Battery and electric device

Abstract

The invention discloses a battery and a power utilization device, the battery comprises a box body, a fixed beam, a battery monomer and a first heat exchange piece, the fixed beam is arranged in the box body and divides the inner space of the box body into a first cavity and a second cavity, the fixed beam and / or the box body form an avoiding space communicating the first cavity and the second cavity, the battery monomer is arranged in the box body and located in the first cavity, and the first heat exchange piece is arranged in the box body. The first heat exchange piece is arranged in the box body and is positioned between the battery monomers and the box body, the first heat exchange piece comprises at least one heat exchange pipe, the heat exchange pipe defines a heat exchange flow channel, the first heat exchange piece comprises a heat exchange part and a connecting part, the heat exchange part is positioned in the first cavity and is used for exchanging heat with the battery monomers, and the connecting part forms a port of the heat exchange flow channel; the connecting part penetrates through the avoiding space from the heat exchange part and extends to the second cavity, so that the port of the heat exchange runner is located in the second cavity, and the avoiding space is constructed to allow the connecting part to extend to the second cavity from the first cavity through the avoiding space. Therefore, the use reliability of the battery can be improved.

Description

[0001] This application is a divisional application of the patent application with the application date of February 6, 2024, application number 202410171916.7, and invention title "Battery and Electrical Appliance". Technical Field

[0002] This application relates to the technical field of batteries, and particularly to a battery and an electrical appliance. Background Art

[0003] In recent years, new energy vehicles have achieved leapfrog development. In the field of electric vehicles, the battery, as the power source of electric vehicles, plays an irreplaceable and important role. Among them, the battery, as a core component of new energy vehicles, has high requirements in terms of reliability. Summary of the Invention

[0004] This application provides a battery and an electrical appliance, which can improve the reliability of battery use.

[0005] In a first aspect, an embodiment of this application provides a battery, including: a box body; a fixed beam disposed in the box body and dividing the internal space of the box body into a first chamber and a second chamber. The fixed beam has a first recess, and / or the wall of the box body has a second recess. The first recess and / or the second recess construct an avoidance space communicating the first chamber and the second chamber; a battery cell disposed in the box body and located in the first chamber; a first heat exchange member disposed in the box body and located between the battery cell and the box body. The first heat exchange member includes at least one heat exchange tube, and the heat exchange tube defines a heat exchange flow path. In the cross-section of the heat exchange tube, the thickness of the heat exchange tube is less than the width of the heat exchange tube. The cross-section of the heat exchange member is perpendicular to the central axis of the heat exchange tube, and the first heat exchange member includes a heat exchange portion and a connection portion. The heat exchange portion is located in the first chamber and is used for heat exchange with the battery cell. The connection portion forms a port of the heat exchange flow path. The connection portion penetrates through the avoidance space from the heat exchange portion and extends to the second chamber, so that the port of the heat exchange flow path is located in the second chamber. The avoidance space is configured to allow the connection portion to extend from the first chamber to the second chamber through the avoidance space.

[0006] In the above technical solution, a relief space is formed in the fixed beam, and the connecting portion passes through the relief space from the heat exchange portion and extends to the second cavity, so that the port of the heat exchange flow path is located in the second cavity, which facilitates the assembly of the first heat exchange member and the fixed beam, and makes it convenient for the connecting portion of the first heat exchange member to extend to the second cavity without being bent greatly around the fixed beam, which is beneficial to simplifying the structure of the first heat exchange member; at the same time, the setting of the above relief space can make the ports of the heat exchange flow paths all located in the second cavity, that is, the ports of the heat exchange flow paths and the battery cells are separated by the fixed beam and located in different cavities respectively, which is convenient for the box body to provide a suitable layout space for the connection between the first heat exchange member and other components. At the same time, even if a heat exchange medium leaks at the port position of the first heat exchange member, the leaked heat exchange medium is not likely to flow to the position where the battery cell is located immediately, so as to be beneficial to reducing the influence of the heat exchange medium leakage at the port position of the first heat exchange member on the battery cell and facilitating the improvement of the use reliability of the battery; by providing the first recess and / or the second recess to construct the relief space, the relief space is arranged between the box body and the fixed beam, so that the connecting portion passing through the relief space can be arranged closer to the wall of the box body corresponding to the first heat exchange member, which is beneficial to reducing the distance between the connecting portion and the heat exchange portion in the normal direction of the above wall of the box body, and even beneficial to making the connecting portion and the heat exchange portion not bent at the connecting position, which is beneficial to simplifying the structure of the first heat exchange member and facilitating processing; by setting the relief space to allow the connecting portion to pass through, that is, the relief space allows the connecting portion to pass through, the relief space can allow the connecting portion to extend from the first cavity to the second cavity through the relief space. Then, when assembling the battery, the assembly method of "first assembling the box body and the fixed beam, and then installing the first heat exchange member on the box body" can be selected. This assembly method is especially suitable for the setting of "after the fixed beam and the box body are assembled, the two are electrophoresed together to form a protective film, and then the first heat exchange member is installed", which is beneficial to improving the assembly convenience.

[0007] In some embodiments, the portion of the first heat exchange member located in the first cavity and the portion located in the second cavity are connected at an obtuse angle.

[0008] In the above technical solution, by setting the parts of the first heat exchanger on the opposite sides of the fixed beam to be obtusely connected, it is convenient for the first part to align with the avoidance space first during the assembly process of the first heat exchanger. At this time, the second part is arranged obliquely approximately. As the first part passes through, the inclination angle of the second part gradually decreases until the first part passes through the avoidance space to complete the threading of the first heat exchanger. At this time, it is convenient for the heat exchange part of the first heat exchanger to fit with the corresponding wall of the box body, facilitating the threading of the first heat exchanger and being beneficial to improving the installation convenience of the first heat exchanger; moreover, the above assembly method is especially applicable to the situation where the heat exchange part occupies a large space on the corresponding wall of the box body. For example, the heat exchange part is configured such that in the direction from the first cavity to the second cavity, the length of the first heat exchanger is greater than or equal to the length of the first cavity. At this time, the first heat exchanger cannot be directly arranged on the corresponding wall along the normal direction of the corresponding wall of the box body. The assembly method in the above solution can be used to achieve the smooth installation of the first heat exchanger, and at the same time, it is beneficial to increase the heat exchange area of the heat exchange part.

[0009] In some embodiments, the battery further includes a current collector, the current collector is communicated with the port of the connecting part, and the current collector is located in the second cavity.

[0010] In the above technical solution, by setting the current collector to be communicated with the port, the heat exchange medium flows to the heat exchange flow channel through the current collector, and / or the heat exchange medium after heat exchange in the heat exchange flow channel flows to the current collector through the port, which is convenient for realizing the circulating flow of the heat exchange medium; since the current collector is located in the second cavity, the communication position between the current collector and other components except the first heat exchanger is also located in the second cavity. Even if heat exchange medium leakage occurs at the communication position between the current collector and the above other components, the leaked heat exchange medium is not likely to flow to the first cavity where the battery cell is located immediately, which is beneficial to reducing the influence of heat exchange medium leakage at the current collector on the battery cell and is beneficial to improving the reliability of battery use.

[0011] In some embodiments, the avoidance space is configured to allow the current collector to move from the first cavity to the second cavity through the avoidance space.

[0012] In the above technical solution, by setting the avoidance space to allow the current collector to move from the first cavity to the second cavity through the avoidance space, then during battery assembly, an assembly method of "first assembling the box body and the fixed beam, assembling the first heat exchanger and the current collector, and then assembling the completed first heat exchanger and current collector onto the box body" can be selected. This assembly method is especially applicable to the setting of "after the fixed beam and the box body are assembled and then electrophoresed together to form a protective film, and then the first heat exchanger is installed", which is beneficial to taking into account both the assembly convenience and the protection ability of the battery.

[0013] In some embodiments, the connecting portion has at least two ports, and the current collector, the connecting portion and the avoidance space correspond one to one. The current collector connects to the multiple ports of the corresponding connecting portion, or the current collector separates the multiple ports of the corresponding connecting portion into multiple independent flow channels.

[0014] In the above technical solution, by setting the collector and the avoidance space in one-to-one correspondence, and making the collector correspond to at least two ports, so that on the premise of realizing the liquid inlet and liquid outlet of the heat exchange channel through the collector, the avoidance space can correspond to at least two ports, which is beneficial to reduce the number of avoidance spaces, simplify the processing procedure of the fixed beam, and facilitate the processing of the fixed beam.

[0015] In some embodiments, there are multiple heat exchange channels, and the two ports of each heat exchange channel are respectively a first port and a second port, the first port is used for liquid inlet, and the second port is used for liquid outlet. There are two current collectors, which are respectively a first current collector and a second current collector. All first ports are connected to the first current collector, and all second ports are connected to the second current collector; or, there is one current collector, and the current collector has two separated and independently arranged channels, all first ports are connected to one of the channels, and all second ports are connected to the other channel.

[0016] In the above technical solution, no matter whether there are one or two current collectors, it is convenient to use a smaller number of current collectors to realize the circulation of media in all heat exchange channels, which can reduce the number of avoidance spaces, and is conducive to reducing processing difficulty and saving processing steps.

[0017] In some embodiments, the fixed beam is configured as a first expansion beam and has a first mating surface that abuts against the battery cell. The battery also includes: a carrier, the carrier is arranged in the avoidance space and has a second mating surface that abuts against the battery cell. The first mating surface is arranged flush with the second mating surface. The carrier has a groove for the avoidance connection part, and the groove runs through the outer peripheral side of the carrier.

[0018] In the above technical scheme, by arranging a carrier in the avoidance space and making the second mating surface of the carrier flush with the first mating surface of the fixed beam, the carrier can bear the expansion force of the battery cell together with the fixed beam, which is beneficial to reducing the deformation difference of the battery cell at the avoidance space position and other positions offset from the first avoidance space, and is beneficial to reducing the risk of lithium precipitation caused by excessive deformation difference at different positions of the battery cell, and is also beneficial to reducing the risk of battery cell shell rupture and electrolyte leakage due to uneven force, thereby improving the reliability of battery use; moreover, since the groove runs through the outer peripheral side of the carrier, not only the groove can achieve avoidance of the corresponding connection part, but also it is convenient to install the carrier to the avoidance space after the first heat exchanger and the fixed beam are installed, so as to achieve smooth installation of the carrier.

[0019] In some embodiments, a stop portion that abuts against the carrier is formed on at least one of the fixed beam and the box body to limit the movement of the carrier in the direction from the first cavity towards the second cavity.

[0020] In the above technical solution, by providing a stop portion formed on at least one of the fixed beam and the box body to limit the movement of the carrier in the direction from the first cavity towards the second direction, reliable positioning of the carrier in the width direction of the fixed beam can be achieved. At the same time, the stop portion can resist the expansion force exerted by the battery cell on the carrier, which is beneficial to improving the load-bearing capacity of the carrier so that the carrier can stably bear the expansion force of the battery cell and reduce the probability of the carrier moving towards the second cavity under the action of the battery cell. Moreover, if at least one of the fixed beam and the box body is also fixedly connected to the carrier in other ways, such as bonding at least one of the fixed beam and the box body to the carrier, the above solution is beneficial to reducing the acting force borne by other connection methods between at least one of the fixed beam and the box body and the carrier, and is beneficial to improving the setting reliability and stability of the carrier.

[0021] In some embodiments, a stop portion is formed on the side of the fixed beam facing the first cavity at the position of the avoidance space; and / or, a stop step protruding towards the fixed beam is formed on the wall of the box body where the first heat exchange member is provided, and the stop step is formed as the stop portion.

[0022] In the above technical solution, by providing a stop portion formed on the side of the fixed beam facing the first cavity at the position of the avoidance space, it is convenient to use the structure of the fixed beam itself to define the stop portion to realize the positioning of the carrier without separately setting it additionally, which is beneficial to simplifying the structure of the fixed beam. At the same time, the stop portion is located on the side of the fixed beam facing the first cavity, which is convenient to match with the installation method of the carrier "cooperating in the avoidance space in the direction from the first cavity towards the second cavity", so that the stop portion does not interfere with the assembly of the carrier, which is beneficial to improving the assembly convenience. By providing a stop step protruding towards the fixed beam on the wall of the box body and forming the stop step as the stop portion, it is convenient to use the structure of the box body itself to define the stop portion to realize the positioning of the carrier without separately setting it additionally, which is beneficial to simplifying the structure of the box body. At the same time, the setting of the stop step does not affect the sealing performance of the box body itself.

[0023] In some embodiments, in the cross-section of the fixed beam, the stop portion on the fixed beam is formed as an arc structure, and the cross-section of the fixed beam is perpendicular to the length direction of the fixed beam.

[0024] In the above technical solution, by setting the stop portion on the fixed beam to form an arc structure on the cross-section of the fixed beam, so that while the stop portion can limit the movement of the bearing member, it can also achieve a certain degree of avoidance of the portion of the bearing member that cooperates with the stop portion. At the same time, combined with the fact that the stop portion is located on the side of the fixed beam facing the first cavity, it is convenient to improve the situation that the bearing member is prone to protrude from the first mating surface toward the first cavity due to cooperation with the stop portion, and it is convenient to achieve the flush setting of the second mating surface and the first mating surface. In addition, when the portion of the fixed beam corresponding to the stop portion is an integrally formed bent plate, the stop portion can be located at the bending position of the plate, so that the stop portion can be directly formed during the forming process of the bent plate, which is beneficial to saving the processing procedures of the fixed beam, reducing the processing difficulty, and improving the production efficiency.

[0025] In some embodiments, the bearing member includes: a plate body portion, a second mating surface is formed on one surface of the thickness of the plate body portion, and a slot penetrates through both sides of the thickness of the plate body portion; a mating portion, the mating portion is formed at the outer edge of the plate body portion and abuts and cooperates with the fixed beam to limit the movement of the bearing member in the direction from the first cavity toward the second cavity.

[0026] In the above technical solution, by setting the bearing member to include a plate body portion and a mating portion, it is convenient for the plate body portion to provide a relatively large and flat second mating surface, improving the shielding ability of the bearing member for the avoidance space, and the mating portion can realize the positioning of the bearing member, achieving the reliable installation of the bearing member, so that the bearing member has a certain ability to withstand the expansion force of the battery cell. At the same time, the structure of the bearing member is simple and easy to implement; in addition, since the mating portion abuts and cooperates with the fixed beam, if the fixed beam is deformed to a certain extent under the action of the battery cell, resulting in the deviation of the first mating surface from its original position and / or original posture, it is convenient for the mating portion to adapt to the deformation of the fixed beam and for the second mating surface of the bearing member to be adaptively adjusted with the change of the first mating surface, which is convenient for the second mating surface and the first mating surface to be always flush or have a very small misalignment to a certain extent.

[0027] In some embodiments, the mating portion has a first surface and a second surface, the first surface is formed as an arc surface that is concave toward the second surface and cooperates with the fixed beam, and the second surface is connected to the first surface and is flush with the second mating surface.

[0028] In the above technical solution, by setting the first surface of the mating portion to abut and cooperate with the fixed beam, due to the arc setting of the first surface, it is convenient to realize the positioning cooperation between the bearing member and the fixed beam, and at the same time, it is convenient to prevent the second surface from protruding from the second mating surface toward the first cavity, which will not affect the cooperation between the second mating surface and the battery cell; of course, the second surface can also abut and cooperate with the battery cell.

[0029] In some embodiments, at least one latch hole is formed on the fixed beam, and the carrier also includes: at least one latch hook portion, the latch hook portion is formed at the outer edge of the plate body and is located on the side of the plate body away from the second mating surface, and the latch hook portion is latched in the corresponding latch hole.

[0030] In the above technical solution, by setting the hook portion of the carrier to be clamped in the clamping hole on the fixed beam, it is convenient to realize the movement of the carrier in the direction from the second cavity toward the first cavity, which is beneficial to further improve the installation reliability of the carrier and improve the problem that the carrier is easy to leave the avoidance channel along the direction from the second cavity to the first cavity during the battery assembly process. For example, the above setting can realize the pre-limitation of the carrier, which is beneficial to further improve the battery assembly efficiency.

[0031] In some embodiments, the carrier also includes: at least one supporting portion, which is disposed on a side of the plate portion away from the second mating surface and is arranged to avoid the slot, and the supporting portion is in a stop-fitting relationship with the box body.

[0032] In the above technical scheme, by setting the support part, it is convenient to strengthen the plate body and improve the structural strength of the carrier, and the support part will not affect the stop-stop cooperation between the plate body and the battery cell; and the stop-stop cooperation between the support part and the box body makes it convenient to disperse the force exerted by the battery cell on the carrier to the box body through the support part, which is beneficial to further improve the installation reliability and carrying capacity of the carrier, and the carrier is respectively matched with the fixed beam and the box body through the matching part and the support part, so that the entire plate body can be supported and limited more evenly. At the same time, since the support part avoids the groove setting, the setting of the support part will not interfere with the connecting part, so that the convenient assembly of the carrier is realized.

[0033] In some embodiments, the width of the support portion in the thickness direction of the plate body increases from the matching portion toward the first heat exchange element.

[0034] In the above technical solution, by setting the width of the support part in the direction of the plate thickness to increase from the matching part toward the first heat exchanger, it is convenient to use a smaller amount of material to increase the stop-fit ​​area between the support part and the box body, improve the matching reliability of the support part and the box body, and achieve a balance between cost and load-bearing reliability.

[0035] In some embodiments, the bearing member is disposed between the first heat exchange member and the fixed beam, and the thermal conductivity of the bearing member is lower than the thermal conductivity of the fixed beam; and / or the bearing member and the first heat exchange member are spaced apart.

[0036] In the above technical solution, the bearing member is arranged between the first heat exchanger and the fixed beam. At the same time, the thermal conductivity of the bearing member is lower than that of the fixed beam, and / or the bearing member is arranged at an interval from the first heat exchanger, which is beneficial to increasing the thermal resistance between the first heat exchanger and the fixed beam, reducing the heat exchange amount between the expansion beam and the first heat exchanger, and to a certain extent, is beneficial to increasing the proportion of the heat or cold transferred from the first heat exchanger to the battery cell, and improving the thermal management performance. In addition, when the bearing member is arranged at an interval from the first heat exchanger, the risk of interference between the bearing member and the first heat exchanger can be reduced during the assembly of the bearing member, and the installation convenience of the bearing member can be improved.

[0037] In some embodiments, the strength of the material of the bearing member is at least 0.8 times the strength of the material of the fixed beam.

[0038] In the above technical solution, by setting the strength of the material of the bearing member to be at least 0.8 times the strength of the material of the fixed beam, it is convenient for the bearing member itself to have good bearing capacity so that the bearing member can reliably and stably bear the expansion force of the battery cell.

[0039] In some embodiments, the first heat exchanger is arranged on the bottom wall of the box body, and one end of the second mating surface facing the first heat exchanger is flush with one end of the battery cell facing the corresponding first heat exchanger, or one end of the second mating surface facing the first heat exchanger is arranged closer to the first heat exchanger than one end of the battery cell facing the corresponding first heat exchanger.

[0040] In the above technical solution, by setting one end of the second mating surface facing the first heat exchanger to be flush with one end of the battery cell facing the corresponding first heat exchanger, or one end of the second mating surface facing the first heat exchanger to be arranged closer to the first heat exchanger than one end of the battery cell facing the corresponding first heat exchanger, it is convenient for the entire surface of the battery cell facing the fixed beam to be supported, which is beneficial to improving the uniformity of the force when the battery cell expands and deforms, and improving problems such as lithium plating and liquid leakage caused by uneven force, thereby improving the reliability of battery use.

[0041] In some embodiments, the fixed beam is configured as a first expansion beam, and the fixed beam is arranged at an interval from the first heat exchanger so that heat insulation is provided between the first heat exchanger and the fixed beam.

[0042] In the above technical solution, by providing heat insulation between the first heat exchanger and the fixed beam, the thermal resistance between the first heat exchanger and the fixed beam is increased, which is beneficial to reducing the heat or cold transferred from the first heat exchanger to the fixed beam, and is beneficial to reducing the temperature difference between the fixed beam and the peripheral battery cells in contact with it, facilitating the improvement of the consistency of the heat exchange environment between the peripheral battery cells and the internal battery cells, and thus being beneficial to reducing the temperature difference between the peripheral battery cells and the internal battery cells and improving the battery reliability.

[0043] In some embodiments, a second recess is formed in the wall of the box body. The second recess constructs at least part of the avoidance space. The part of the first heat exchange member passing through the avoidance space is disposed in the second recess, and the fixing beam is attached to the part of the wall of the box body other than the second recess; alternatively, the fixing beam is spaced apart from the part of the wall of the box body other than the second recess.

[0044] In the above technical solution, by setting the fixing beam to be attached to the part of the wall of the box body other than the second recess, for the above-mentioned wall of the box body and the fixing beam, at the position where the first heat exchange member passes through, the fixing beam is spaced apart from the wall of the box body, that is, the fixing beam is spaced apart from the second recess, so as to achieve heat insulation between the fixing beam and the first heat exchange member while avoiding the first heat exchange member. At the position where the first heat exchange member is not passed through, the fixing beam is attached to the wall of the box body, that is, the fixing beam is in zero contact with the wall of the box body, which is convenient for increasing the fitting area between the fixing beam and the box body and is beneficial to improving the installation reliability of the fixing beam; by setting the fixing beam to be spaced apart from the part of the wall of the box body other than the second recess, it is beneficial to further increase the interval between the entire fixing beam and the first heat exchange member, which is convenient for increasing the thermal resistance between the entire fixing beam and the first heat exchange member, reducing the heat or cold transferred from the first heat exchange member to the fixing beam, and facilitating the improvement of the energy utilization rate of the first heat exchange member.

[0045] In some embodiments, the battery further includes: a heat insulation member, the heat insulation member includes a first heat insulation portion, and the first heat insulation portion is disposed between the wall surface of the fixing beam corresponding to the avoidance space and the connecting portion.

[0046] In the above technical solution, by setting the first heat insulation portion between the wall surface of the expansion beam corresponding to the avoidance channel and the first heat exchange member, the first heat insulation portion corresponds to the second recess, so as to further increase the thermal resistance between the fixing beam and the first heat exchange member through the heat insulation member.

[0047] In some embodiments, the heat insulation member further includes a second heat insulation portion, and the second heat insulation portion is disposed between the part of the wall of the box body other than the second recess and the fixing beam.

[0048] In the above technical solution, by setting the second heat insulation portion between the part of the wall of the box body other than the second recess and the fixing beam, it is convenient to sandwich the heat insulation member between the box body and the fixing beam, and it is convenient to realize the reliable installation of the heat insulation member through the fixation of the fixing beam and the box body. Thus, the heat insulation member is convenient to provide a relatively flat mating surface for the connection between the box body and the fixing beam, and at the same time is beneficial to reducing the depth of the second recess and improving the forming convenience of the second recess.

[0049] In some embodiments, a first fixing member is further provided on the fixing beam. At least part of the first fixing member is located inside the fixing beam. The battery further includes a second fixing member, and the second fixing member passes through the box body, the second heat insulation portion and the fixing beam and is connected to the first fixing member.

[0050] In the above technical solution, at least a part of the first fixing member is disposed within the fixing beam, and the second fixing member passes through the box body, the second heat insulation portion and the fixing beam and is connected to the first fixing member, so as to realize the fixing of the box body, the heat insulation member and the fixing beam through a simple fixing method, and at the same time realize the reliable installation of the heat insulation member; at the same time, the second fixing member can be installed in the direction of the heat insulation member towards the fixing beam, which is convenient for providing sufficient operating space during the assembly process of the second fixing member and improving the assembly convenience. In addition, the second fixing member passes through the second heat insulation portion, which is convenient for separating the second fixing member from the first heat exchange member, so that the arrangement of the second fixing member does not affect the first heat exchange member.

[0051] In some embodiments, the heat exchange tube is a flat tube or a corrugated tube.

[0052] In the above technical solution, by setting the heat exchange tube as a flat tube or a corrugated tube, it is beneficial to save the occupied space of the heat exchange tube, and at the same time it is convenient to utilize one side of the thickness of the heat exchange tube for heat exchange with the battery cell, so as to achieve the balance between the volume energy density and the thermal management of the battery. For example, the heat exchange tube can be extruded, and the thickness of the heat exchange tube can be as small as about 0.7 mm. In the related art, a water cooling plate structure is adopted. The water cooling plate usually includes two stacked plates, and the two plates are welded and fixed to define a flow channel. Therefore, the thickness of the water cooling plate is usually thick, reaching more than 2.4 mm. It can be seen that the above setting of the present application can reduce the cost of the first heat exchange member, and at the same time save the occupied space of the first heat exchange member, which is convenient for also taking into account the improvement of the battery energy density when the first heat exchange member is disposed in the box body.

[0053] In some embodiments, the first heat exchange member includes at least one heat exchange tube, and at least one heat exchange tube is configured as a first heat exchange tube. The first heat exchange tube includes a first heat exchange section and a second heat exchange section. The second heat exchange section is bent to form a U-shaped region, and the first heat exchange section is bent and disposed within the U-shaped region and is bent and connected to the second heat exchange section.

[0054] In the above technical solution, by bending the second heat exchange section to form a U-shaped region, and the first heat exchange section is bent and disposed within the U-shaped region. When the first heat exchange tube exchanges heat with a plurality of battery cells, the U-shaped region formed by the outer second heat exchange section can be opposed to the outer battery cells, and the first heat exchange section within the U-shaped region can be opposed to the inner battery cells, so that the first heat exchange tube can compensate for the internal and external temperature difference caused by the heat exchange between the outer battery cells and the environment, and make the heat exchange effect between the outer battery cells and the inner battery cells tend to be consistent, improving the temperature uniformity of the battery, thereby improving the service life of the battery to a certain extent.

[0055] In some embodiments, the first heat exchange section includes a first heat exchange portion and a first bending portion. There are multiple first heat exchange portions arranged at intervals along a first direction, and each first heat exchange portion extends along a second direction. The first bending portion is arc-shaped and is bent and connected between two adjacent first heat exchange portions, so that the multiple first heat exchange portions are connected in sequence. The second direction is set at an angle to the first direction.

[0056] In the above technical solution, on the one hand, by providing multiple first heat exchange portions, the heat exchange area of the first heat exchange section can be increased, and further the heat exchange area of the first heat exchange tube can be increased, thereby improving the heat exchange effect of the first heat exchange tube. On the other hand, since the internal battery cells are wrapped by the external battery cells and the temperature difference between the internal battery cells is not large, therefore, by providing multiple first heat exchange portions, the overall heat exchange effect can be ensured on the premise of ensuring a small temperature difference between the internal and external battery cells.

[0057] In some embodiments, the second heat exchange section includes a second heat exchange portion, a third heat exchange portion, and a fourth heat exchange portion. The second heat exchange portion extends along the peripheral edge of the first side of the first heat exchange section. The third heat exchange portion is connected between the second heat exchange portion and the first heat exchange section and extends along the peripheral edge of the second side of the first heat exchange section. The first end of the third heat exchange portion is connected to the second heat exchange portion at an angle, and the second end of the third heat exchange portion is connected to the first heat exchange section at an angle. The fourth heat exchange portion communicates with the second heat exchange portion and is connected to the second heat exchange portion at an angle, and the fourth heat exchange portion extends along the peripheral edge of the third side of the first heat exchange section.

[0058] In the above embodiment, by arranging the second heat exchange portion, the third heat exchange portion, and the fourth heat exchange portion on three of the sides of the first heat exchange section respectively, the second heat exchange section can surround the first heat exchange section, thereby increasing the layout compactness of the first heat exchange tube, realizing the miniaturization of the structure of the first heat exchange tube, and further being beneficial to improving the volumetric energy density of the battery. At the same time, the structure of the first heat exchange tube can be simplified, facilitating the processing and production of the first heat exchange member.

[0059] In some embodiments, the first heat exchange section includes a plurality of first heat exchange parts, and the plurality of first heat exchange parts are sequentially bent and connected in a first direction; wherein, the second heat exchange part is located on one side of the plurality of first heat exchange parts along the first direction, the third heat exchange part is located on one side of the plurality of first heat exchange parts along a second direction, and the first direction and the second direction are arranged at an angle; a first end of the third heat exchange part is connected to one end of the second heat exchange part along the second direction, a second end of the third heat exchange part is connected to one of the plurality of first heat exchange parts that is the farthest from the second heat exchange part along the first direction, the fourth heat exchange part is located on the other side of the plurality of first heat exchange parts along the second direction, one end of the fourth heat exchange part is connected to the end of the second heat exchange part that is far from the third heat exchange part, and the other end of the fourth heat exchange part extends along the first direction away from the second heat exchange part; or, the second heat exchange part is located on one side of the plurality of first heat exchange parts along the second direction, the third heat exchange part is located on one side of the plurality of first heat exchange parts along the first direction, and the first direction and the second direction are arranged at an angle; a first end of the third heat exchange part is connected to one end of the second heat exchange part along the first direction, a second end of the third heat exchange part is connected to one of the plurality of first heat exchange parts that is the closest to the third heat exchange part along the first direction, the fourth heat exchange part is located on the other side of the plurality of first heat exchange parts along the first direction, one end of the fourth heat exchange part is connected to the end of the second heat exchange part that is far from the third heat exchange part, and the other end of the fourth heat exchange part extends along the second direction away from the second heat exchange part.

[0060] In the above embodiment, by arranging a plurality of first heat exchange parts to be sequentially bent and connected in the first direction, the second heat exchange part is located on one side of the plurality of first heat exchange parts along the first direction / second direction, the third heat exchange part is located on one side of the plurality of first heat exchange parts along the second direction / first direction, and the fourth heat exchange part is located on the other side of the plurality of first heat exchange parts along the second direction / first direction, the positional relationship among the second heat exchange part, the third heat exchange part, the fourth heat exchange part and the first heat exchange part is defined, further defining the layout of the first heat exchange tube, simplifying the structure of the first heat exchange tube, and facilitating processing and manufacturing.

[0061] In some embodiments, the second heat exchange section further includes: a fifth heat exchange part, the fifth heat exchange part extends along the fourth side perimeter of the first heat exchange section, and at least partially closes the opening of the U-shaped area formed by the second heat exchange part, the third heat exchange part and the fourth heat exchange part.

[0062] In the above technical solution, by arranging the fifth heat exchange part, the second heat exchange section can perform heat exchange on the four-side perimeters of the components formed by all battery monomers. In this way, the second heat exchange section of one first heat exchange tube can perform heat exchange on the four-side perimeters of the components formed by multiple battery monomers, which is beneficial to improving the heat exchange effect on the four sides of the battery and enhancing the battery temperature uniformity.

[0063] In some embodiments, the first heat exchanger further includes a second heat exchange tube. The second heat exchange tube and the first heat exchange tube are disposed on the same side of the battery cell. At least a part of the second heat exchange tube is bent and disposed within the U-shaped region of the first heat exchange tube. The bending structure of the second heat exchange tube is the same as or different from that of the first heat exchange tube.

[0064] In the above technical solution, by providing the second heat exchange tube, the diversity of the heat exchange flow channels of the first heat exchanger can be increased, making the arrangement of the heat exchange flow channels more flexible, which is beneficial to further improving the heat exchange effect of the first heat exchanger and enhancing the temperature uniformity of the battery.

[0065] In some embodiments, the second heat exchange tube includes a U-shaped region having the same structure as the first heat exchange tube. At least a part of the first heat exchange section of the first heat exchange tube is disposed within the U-shaped region of the second heat exchange tube.

[0066] In the above technical solution, by disposing at least a part of the first heat exchange section of the first heat exchange tube within the U-shaped region of the second heat exchange tube, the first heat exchange tube and the second heat exchange tube can be wound around each other. In this way, the winding modes of multiple heat exchange tubes can be arranged according to the heat exchange requirements of different parts of the battery assembly, further increasing the heat exchange effect of the first heat exchanger and enhancing the temperature uniformity of the battery.

[0067] In some embodiments, the second heat exchange tube includes a third heat exchange section and a fourth heat exchange section connected by bending. The third heat exchange section and the fourth heat exchange section are respectively bent to form U-shaped regions. The third heat exchange section is disposed within the U-shaped region of the fourth heat exchange section. At least a part of the first heat exchange section of the first heat exchange tube is disposed within the U-shaped region of the third heat exchange section.

[0068] In the above technical solution, by disposing at least a part of the first heat exchange section of the first heat exchange tube within the U-shaped region of the third heat exchange section, at least a part of the first heat exchange section of the first heat exchange tube is also located within the U-shaped region of the fourth heat exchange section. On the premise of realizing the mutual winding of the first heat exchange tube and the second heat exchange tube, it is convenient to simplify the winding arrangement of the two, and at the same time, it is beneficial to further improve the heat exchange effect and enhance the temperature uniformity of the battery.

[0069] In some embodiments, the second heat exchange tube further includes a fifth heat exchange section. The fifth heat exchange section includes a fifth heat exchange part and a second bending part. There are multiple fifth heat exchange parts arranged at intervals along a first direction. Each first heat exchange part extends along a second direction. The second bending part is arc-shaped and is bent and connected between two adjacent fifth heat exchange parts to connect the multiple fifth heat exchange parts in sequence. The second direction is set at an angle to the first direction. Among them, a fifth heat exchange section is provided between the third heat exchange section and the fourth heat exchange section, and / or a fifth heat exchange section is provided between the third heat exchange section and the corresponding port.

[0070] In the above technical solution, by providing the fifth heat exchange section, it is convenient to further increase the heat exchange area of the second heat exchange tube, improve the heat exchange effect of the second heat exchange tube, and at the same time facilitate the temperature control of the internal battery cells. Moreover, the provision of the fifth heat exchange section does not affect the mutual winding between the first heat exchange tube and the second heat exchange tube.

[0071] In some embodiments, the first heat exchange member further includes a third heat exchange tube, and at least a part of the third heat exchange tube is bent and disposed within the U-shaped region of the second heat exchange tube.

[0072] In the above technical solution, by providing at least a part of the third heat exchange tube bent and disposed within the U-shaped region of the second heat exchange tube, it is convenient to further achieve good temperature control of the internal battery cells, beneficial to improving the temperature distribution of the entire battery, and facilitating the improvement of the temperature uniformity of the battery.

[0073] In some embodiments, the fixed beam is configured as a first expansion beam and includes: a beam body defining a cavity; a reinforcing partition disposed within the cavity and having a plurality of spaced-apart connecting portions. The plurality of connecting portions include a first connecting portion and a second connecting portion. The first connecting portion and the second connecting portion are respectively connected to opposite side walls of the beam body, so that the reinforcing partition divides the cavity into a plurality of chambers, and the first connecting portion and the second connecting portion are staggered.

[0074] In the above technical solution, by providing the first expansion beam including a beam body and a reinforcing partition, the reinforcing partition is disposed within the cavity and divides the cavity of the beam body into a plurality of chambers, such that the reinforcing partition provides a certain supporting and strengthening effect on opposite sides of the beam body, which is beneficial to improving the structural strength, load-bearing capacity and structural stability of the first expansion beam, thereby enhancing the use reliability of the first expansion beam.

[0075] In some embodiments, the beam body includes a first plate body and a second plate body disposed opposite to each other. The first plate body and the second plate body are connected and jointly define a cavity. The reinforcing partition is disposed between the first plate body and the second plate body and has a third connecting portion. The third connecting portion is clamped between the first plate body and the second plate body and is connected to the first plate body and the second plate body.

[0076] In the above technical solution, by providing the beam body including a first plate body and a second plate body, and the reinforcing partition disposed between the first plate body and the second plate body, not only is the connection with the first plate body achieved through the first connecting portion and the third connecting portion, and the connection with the second plate body achieved through the second connecting portion and the third connecting portion, but also the expansion beam has a simple structure, is convenient to assemble, and has good structural stability.

[0077] In some embodiments, the battery further includes a second expansion beam spaced apart from the first expansion beam. The battery cell is disposed between the first expansion beam and the second expansion beam. A third fixing member is provided in the cavity of the first expansion beam, and a fourth fixing member is provided in the cavity of the second expansion beam. The battery further includes a pull rope that passes through the corresponding cavity and is respectively connected to the third fixing member and the fourth fixing member.

[0078] In the above technical solution, by setting the pull rope to be connected to the third fixing member and the pull rope to be connected to the fourth fixing member, when the battery cell between the first expansion beam and the second expansion beam expands and deforms, the pull rope can apply a force to the first expansion beam and the second expansion beam to resist the expansion force of the battery cell; moreover, since the third fixing member and the fourth fixing member are provided in the cavities of the corresponding expansion beams, even if at least one of the third fixing member and the fourth fixing member fails to be connected to the corresponding expansion beam, the above at least one of the third fixing member and the fourth fixing member can be restricted in the cavity of the corresponding expansion beam, which is beneficial to reducing the risk of the above at least one of the third fixing member and the fourth fixing member detaching from the corresponding expansion beam and causing the pull rope to fail.

[0079] In some embodiments, the box body includes a first box body. The first box body is an integrally stamped part and includes a bottom wall and a surrounding wall. The surrounding wall is disposed around the bottom wall. The fixing beam is respectively connected to the bottom wall and the surrounding wall, and at least one of the bottom wall and the surrounding wall is provided with a first heat exchange member.

[0080] In the above technical solution, by setting the first box body including the bottom wall and the surrounding wall as an integrally stamped part, it is convenient for the forming of the first box body, which is beneficial to reducing the cost of the first box body and facilitating the first box body to have good structural strength; at the same time, the structure of the first box body itself realizes the sealing between the bottom wall and the surrounding wall, which is beneficial to improving the sealing performance of the bottom of the first box body, thereby saving a plurality of connecting parts (such as bolts) used in the box body to realize the bottom sealing of the first box body, saving the connection process between the bottom wall and the surrounding wall, and being beneficial to improving the assembly efficiency of the box body.

[0081] In some embodiments, the box body has a top wall, a bottom wall and a surrounding wall. The surrounding wall is disposed between the top wall and the bottom wall, and at least one of the top wall, the bottom wall and the surrounding wall is provided with a first heat exchange member.

[0082] In the above technical solution, by setting at least one of the top wall, the bottom wall and the surrounding wall to be provided with a first heat exchange member, the number and arrangement position of the first heat exchange member can be flexibly set according to actual needs, which is convenient for realizing the diversified design of the battery so as to better meet the actual differentiated needs.

[0083] In some embodiments, the fixing beam is configured as a first expansion beam and abuts against the battery cell. The top wall is provided with a first heat exchange member, and the first heat exchange member on the top wall is connected to the fixing beam.

[0084] In the above technical solution, by connecting the first heat exchange member on the top wall to the fixed beam, it is convenient for the first heat exchange member to exert a certain restraint on the fixed beam, which is beneficial to improving the bearing capacity of the fixed beam.

[0085] In some embodiments, the battery further includes at least one of a second heat exchange member and a third heat exchange member. At least one of the second heat exchange member and the third heat exchange member is used for heat exchange with the battery cell. The second heat exchange member is attached to the outside of the box, and the third heat exchange member is arranged between two adjacent battery cells.

[0086] In the above technical solution, by providing that the battery includes at least one of a second heat exchange member and a third heat exchange member, it is beneficial to improve the temperature control ability of the heat exchange assembly for the battery cell, improve the thermal management performance of the battery, and at the same time facilitate temperature control of the battery cell using different heat transfer paths according to different heat exchange requirements of the battery cell.

[0087] In a second aspect, an embodiment of the present application provides an electrical device including the above battery.

[0088] In the above technical solution, by using the above battery, it is convenient to improve the use reliability of the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0090] Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application;

[0091] Figure 2 is an exploded structural view of a battery provided by some embodiments of the present application;

[0092] Figure 3 is a partial schematic view of a battery provided by some embodiments of the present application;

[0093] Figure 4 is Figure 3 another schematic view of the battery shown in

[0094] Figure 5 is a cross-sectional view along the E-E line in Figure 4 ;

[0095] Figure 6 is a cross-sectional view along the F-F line in Figure 4 ;

[0096] Figure 7 is a cross-sectional view along the G-G line in Figure 4 ;

[0097] Figure 8 is a cross-sectional view along the Figure 4Schematic diagram of the assembly process of the first heat exchanger at the sectional view position of the D-D line in the [specific context];

[0098] Figure 9 For Figure 8 Partial enlarged view of the assembly process of the first heat exchanger in the [specific context];

[0099] Figure 10 Partial sectional view of the box provided by some embodiments of the present application;

[0100] Figure 11 Partial schematic diagram of the battery provided by some embodiments of the present application;

[0101] Figure 12 For Figure 11 Front view of the carrier shown in the [specific context];

[0102] Figure 13 For Figure 12 Top view of the carrier shown in the [specific context];

[0103] Figure 14 For the sectional view along the Figure 12 H-H line in the [specific context];

[0104] Figure 15 For Figure 12 Side view of the carrier shown in the [specific context];

[0105] Figure 16 Partial schematic diagram of the battery provided by some embodiments of the present application;

[0106] Figure 17 For Figure 16 Exploded view of the battery shown in the [specific context];

[0107] Figure 18 For Figure 16 Sectional view of the battery shown in the [specific context];

[0108] Figure 19 For Figure 18 Enlarged view of part A circled in the [specific context];

[0109] Figure 20 Partial schematic diagram of the battery provided by some embodiments of the present application;

[0110] Figure 21 For the sectional view along the Figure 20 B-B line in the [specific context];

[0111] Figure 22 For Figure 21 Enlarged view of part C circled in the [specific context];

[0112] Figure 23 Schematic diagram of the first heat exchanger provided by some embodiments of the present application;

[0113] Figure 24 Schematic diagram of the first heat exchanger provided by some embodiments of the present application;

[0114] Figure 25 Schematic diagram of the first heat exchanger provided by some embodiments of the present application;

[0115] Figure 26 Schematic diagram of the first heat exchanger provided by some embodiments of the present application;

[0116] Figure 27 Schematic diagram of the first heat exchanger provided by some embodiments of the present application;

[0117] Figure 28 Partial schematic diagram of the battery provided by some embodiments of the present application;

[0118] Figure 29 Schematic diagram of the third heat exchanger and the battery cell provided by some embodiments of the present application.

[0119] Reference numerals:

[0120] Electrical device 1000, controller 300, motor 400, battery 200, avoidance space 200a, card hole 200d, battery cell 100, box body 101, first cavity 101a, second cavity 101b, second recess 101c, third recess 101d, first box body 1011, bottom wall 1011a, surrounding wall 1011b, stop step 1011c, first mounting hole 1011d, second box body 1012, first heat exchanger 102, heat exchange part 102a, connecting part 102b, second heat exchanger 103, third heat exchanger 104, fixing beam 105, first expansion beam B1, second expansion beam B2, third expansion beam B3, first recess 105a, first mating surface 105b, third mounting hole 105c, beam body 1051, cavity 1051a, chamber 1051b, first plate body A1, second plate body A2, reinforcing partition 1052, connecting part 1052a, first connecting part 1052b, second connecting part 1052c, third connecting part 1052d, bearing part 106, second mating surface 106a, slot 106b, stop part 106c, plate body part 1061, mating part 1062, first surface 1062a, second surface 1062b, hook part 1063, support part 1064, heat insulation part 107, first heat insulation part 1071, second heat insulation part 1072, second mounting hole 1072a, first fixing part 1081, second fixing part 1082, gasket 1083, pull rope 110, third fixing part 111, fourth fixing part 112, bottom guard plate 113, heat exchange tube 1, heat exchange flow path 10, first heat exchange tube 1a, second heat exchange tube 1b, third heat exchange tube 1c, heat exchange part 1d, connecting part 1e, port 11, first port 11a, second port 11b, communicating section 12, U-shaped area 120, first heat exchange section 121, first heat exchange part 1211, first bending part 1212, second heat exchange section 122, second heat exchange part 1221, third heat exchange part 1222, fourth heat exchange part 1223, fifth heat exchange part 1224, third heat exchange section 123, seventh heat exchange part 1231, eighth heat exchange part 1232, ninth heat exchange part 1233, fourth heat exchange section 124, tenth heat exchange part 1241, eleventh heat exchange part 1242, twelfth heat exchange part 1243, fifth heat exchange section 125, sixth heat exchange part 1251, second bending part 1252, sixth heat exchange section 126, seventh heat exchange section 127, thirteenth heat exchange part 1271, third bending part 1272, current collector 2, first current collector 21, second current collector 22. Detailed implementation manner

[0121] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are part of the embodiments of this application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.

[0122] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims, and drawings of this application are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification, claims, or drawings of this application are used to distinguish different objects and not to describe a specific order or primary-secondary relationship.

[0123] Referring to "embodiment" in this application means that the specific features, structures, or characteristics described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0124] The term "and / or" in this application is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0125] In the embodiments of this application, the same reference numerals represent the same components. For the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thicknesses, lengths, widths, etc. of various components shown in the drawings in the embodiments of this application, as well as the overall thickness, length, width, etc. of the integrated device, are only illustrative and should not constitute any limitation to this application.

[0126] The term "plurality" as used in this application refers to two or more including two.

[0127] In this application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the embodiments of this application do not limit this. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, and the embodiments of this application do not limit this either. Generally, the battery cell is divided into three types according to the encapsulation method: cylindrical battery cell, square battery cell, and soft-pack battery cell, and the embodiments of this application do not limit this either.

[0128] The battery mentioned in the embodiments of this application refers to a single physical module that includes multiple battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application can be a battery module or a battery pack, etc. A battery module generally includes multiple battery cells. A battery generally includes a box for encapsulating multiple battery cells or multiple battery modules, and the box can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells; of course, the battery may not include a box.

[0129] Exemplarily, a battery cell generally may include a housing, a cell component, and an electrolyte. The housing is used to accommodate the cell component and the electrolyte, and at least one positive electrode terminal and at least one negative electrode terminal are provided on the housing. The cell component includes one or more electrode components, and the electrode component is formed by laminating or winding a positive electrode tab, a negative electrode tab, and a separator.

[0130] Among them, the positive electrode tab generally may include a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is directly or indirectly coated on the positive electrode current collector. The positive electrode current collector without the positive electrode active material layer coated thereon protrudes from the positive electrode current collector with the positive electrode active material layer coated thereon. The positive electrode current collector without the positive electrode active material layer coated thereon serves as the positive electrode ear tab, and multiple positive electrode ear tabs are stacked together and form an electrical connection with the positive electrode terminal. Exemplarily, multiple positive electrode ear tabs stacked together can be directly welded to the positive electrode terminal to form an electrical connection; or, the cell component may further include a positive electrode adapter plate. Multiple positive electrode ear tabs stacked together are welded to one end of the positive electrode adapter plate, and the other end of the positive electrode adapter plate is welded to the positive electrode terminal to enable the positive electrode ear tab to form an electrical connection with the positive electrode terminal.

[0131] The negative electrode plate generally may include a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is directly or indirectly coated on the negative electrode current collector. The negative electrode current collector without the negative electrode active material layer coated thereon protrudes from the negative electrode current collector with the negative electrode active material layer coated thereon. The negative electrode current collector without the negative electrode active material layer coated thereon serves as the negative electrode tab. Multiple negative electrode tabs are stacked together and form an electrical connection with the negative electrode terminal. Exemplarily, multiple negative electrode tabs stacked together can be directly welded to the negative electrode terminal to form an electrical connection; alternatively, the battery cell assembly may further include a negative electrode adapter plate. Multiple negative electrode tabs stacked together are welded to one end of the negative electrode adapter plate, and the other end of the negative electrode adapter plate is welded to the negative electrode terminal, so that the negative electrode tabs form an electrical connection with the negative electrode terminal. The material of the separator is not limited. For example, it can be polypropylene or polyethylene, etc.

[0132] In recent years, new energy vehicles have achieved leapfrog development. In the field of electric vehicles, the battery, as the power source of the electric vehicle, plays an irreplaceable and important role. Among them, the battery, as a core component of new energy vehicles, has relatively high requirements in terms of reliability.

[0133] In the related art, the battery includes multiple battery cells, and generally uses a heat exchange component to control the temperature of the battery cells. A heat exchange medium is generally introduced into the heat exchange component; however, there is a risk of leakage of the heat exchange medium at the interface position of the heat exchange component, and the leaked heat exchange medium is likely to have a certain impact on the battery cells, thereby affecting the performance of the battery.

[0134] Based on the above considerations, in order to improve the reliability of the battery, a battery is proposed, which includes a box body, a fixed beam, battery cells, and a first heat exchange component. The fixed beam is arranged in the box body and divides the internal space of the box body into a first cavity and a second cavity. The fixed beam has a first recess, and / or the wall of the box body has a second recess. The first recess and / or the second recess construct a relief space communicating the first cavity and the second cavity. The battery cells are arranged in the box body and located in the first cavity. The first heat exchange component is arranged in the box body and located between the battery cells and the box body. The first heat exchange component includes at least one heat exchange tube. The heat exchange tube defines a heat exchange flow channel. In the cross-section of the heat exchange tube, the thickness of the heat exchange tube is less than the width of the heat exchange tube. The cross-section of the heat exchange tube is perpendicular to the central axis of the heat exchange tube. And the first heat exchange component includes a heat exchange part and a connection part. The heat exchange part is located in the first cavity and is used for heat exchange with the battery cells. The connection part forms a port of the heat exchange flow channel. The connection part passes through the relief space from the heat exchange part and extends to the second cavity, so that the port of the heat exchange flow channel is located in the second cavity. The relief space is configured to allow the connection part to extend from the first cavity to the second cavity through the relief space.

[0135] In the above technical solution, an avoidance space is formed in the fixed beam, and the connecting portion passes through the avoidance space from the heat exchange portion and extends to the second cavity, so that the port of the heat exchange flow path is located in the second cavity, which facilitates the assembly of the first heat exchange member and the fixed beam, and enables the connecting portion of the first heat exchange member to extend to the second cavity without significantly bending around the fixed beam, which is beneficial to simplifying the structure of the first heat exchange member. At the same time, the setting of the above avoidance space can make the ports of the heat exchange flow paths all located in the second cavity, that is, the ports of the heat exchange flow paths and the battery cells are separated by the fixed beam and are located in different cavities respectively, which is convenient for the box body to provide a suitable layout space for the connection between the first heat exchange member and other components. At the same time, even if a heat exchange medium leaks at the port position of the first heat exchange member, the leaked heat exchange medium is not likely to flow to the position where the battery cell is located immediately, which is beneficial to reducing the influence of the heat exchange medium leakage at the port position of the first heat exchange member on the battery cell and facilitating the improvement of the use reliability of the battery. By providing the first recess and / or the second recess to construct the avoidance space, the avoidance space is arranged between the box body and the fixed beam, so that the connecting portion passing through the avoidance space can be arranged closer to the wall of the box body corresponding to the first heat exchange member, which is beneficial to reducing the distance between the connecting portion and the heat exchange portion in the normal direction of the above wall of the box body, and even beneficial to making the connecting portion and the heat exchange portion not bend at the connection position, which is beneficial to simplifying the structure of the first heat exchange member and facilitating processing. By setting the avoidance space to allow the connecting portion to pass through, that is, the avoidance space allows the connecting portion to pass through, the avoidance space can allow the connecting portion to extend from the first cavity to the second cavity through the avoidance space. Then, when assembling the battery, the assembly method of "first assembling the box body and the fixed beam, and then installing the first heat exchange member on the box body" can be selected. This assembly method is particularly suitable for the setting of "after the fixed beam and the box body are assembled, the two are electrophoresed together to form a protective film, and then the first heat exchange member is installed", which is beneficial to improving the assembly convenience. In addition, the setting of the heat exchange tube is convenient for improving the structural flexibility of the heat exchange flow path. At the same time, since the thickness of the heat exchange tube is less than the width of the heat exchange tube, and the part of the heat exchange tube corresponding to the connecting portion has to extend from the first cavity to the second cavity through the avoidance space, it is beneficial to reduce the height of the avoidance space in the thickness direction of the heat exchange tube, reduce the forming difficulty of the avoidance space, and / or reduce the weakening of the corresponding structure (fixed beam and / or box body). If the first recess participates in constructing the avoidance space, it is beneficial to reduce the size of the part of the battery cell opposite to the avoidance space and reduce the risks of lithium plating, shell cracking, electrolyte leakage, etc. caused by uneven stress on the battery cell.

[0136] The embodiments of the present application provide an electrical device using the battery of the present disclosure as a power source. The electrical device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, and so on. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy, and an electric aircraft toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spaceship, etc. The electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact drill, a concrete vibrator, and a planer, etc.

[0137] For the convenience of description, the following embodiments take the electrical device as a vehicle as an example to introduce the structures of the electrical device and the battery of the present application in detail.

[0138] Please refer to Figure 1 , Figure 1 FIG. 1000 is a schematic structural diagram of an electrical device 1000 as a vehicle provided by some embodiments of the present application. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle, etc. The vehicle is provided with a battery 200, and the battery 200 may be arranged at the bottom, the head, or the tail of the vehicle. The battery 200 may be used for power supply of the vehicle. For example, the battery 200 may be used as the operating power source of the vehicle. The vehicle may further include a controller 300 and a motor 400. The controller 300 is used to control the battery 200 to supply power to the motor 400. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle. In some embodiments of the present application, the battery 200 may not only be used as the operating power source of the vehicle, but also be used as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0139] Please refer to Figure 2 , Figure 2The structural explosion diagram of the battery cell 100 provided for some embodiments of the present application is for the battery 200. The battery 200 includes a box body 101 and a plurality of battery cells 100, and the battery cells 100 are accommodated in the box body 101. Among them, the box body 101 is used to provide an assembly space for the battery cells, and the box body 101 can adopt various structures. In some embodiments, the box body 101 may include a first box body 1011 and a second box body 1012. The first box body 1011 and the second box body 1012 cover each other, and the first box body 1011 and the second box body 1012 jointly define an accommodation cavity for accommodating the battery cells. The second box body 1012 may be a hollow structure with one end open, and the first box body 1011 may be a plate-like structure. The first box body 1011 covers the open side of the second box body 1012 so that the first box body 1011 and the second box body 1012 jointly define the accommodation cavity; or, the first box body 1011 and the second box body 1012 may also both be hollow structures with one side open. For example Figure 2 As shown, the open side of the first box body 1011 covers the open side of the second box body 1012. Of course, the box body 101 formed by the first box body 1011 and the second box body 1012 can be of various shapes, such as a cylinder, a cuboid, etc.

[0140] In the battery 200, the plurality of battery cells 100 can be connected in series, in parallel or in a hybrid connection. A hybrid connection means that there are both series and parallel connections among the plurality of battery cells 100. The plurality of battery cells 100 can be directly connected in series, in parallel or in a hybrid connection together, and then the whole formed by the plurality of battery cells 100 is accommodated in the box body 101; or, the battery 200 can also be that the plurality of battery cells 100 are first connected in series, in parallel or in a hybrid connection to form a battery module form, and then the plurality of battery modules are connected in series, in parallel or in a hybrid connection to form a whole and are accommodated in the box body 101. The battery 200 may further include other structures. For example, the battery 200 may further include a bus bar for realizing the electrical connection among the plurality of battery cells 100.

[0141] Please refer to Figure 3 , any two of the first direction X1, the second direction X2 and the third direction X3 intersect, and further any two of the first direction X1, the second direction X2 and the third direction X3 are perpendicular to each other.

[0142] Please refer to Figures 3 - 5, in an embodiment of the present application, the battery 200 includes a box body 101, a fixing beam 105 and battery cells 100. The fixing beam 105 is disposed inside the box body 101, and the fixing beam 105 divides the internal space of the box body 101 into a first cavity 101a and a second cavity 101b. The battery cells 100 are disposed inside the box body 101, and the battery cells 100 are located in the first cavity 101a. It can be seen that the battery cells 100 are disposed on a side of the fixing beam 105 away from the second cavity 101b, so that the second cavity 101b can be arranged without battery cells 100, which is convenient for making some layout space for other components. For example, the second cavity 101b can be used to arrange a battery 200 management system, a high-voltage box, etc.

[0143] Please refer to Figure 3 , the battery 200 further includes a first heat exchange member 102. The first heat exchange member 102 is disposed inside the box body 101, and the first heat exchange member 102 is located between the battery cells 100 and the box body 101. The first heat exchange member 102 is formed with at least one heat exchange flow channel 10, and the first heat exchange member 102 includes a heat exchange portion 1d and a connection portion 1e. The heat exchange portion 1d is located in the first cavity 101a, and the heat exchange portion 1d is used for heat exchange with the battery cells 100. The connection portion 1e is formed with ports 11 of the heat exchange flow channel 10.

[0144] It can be seen that each heat exchange flow channel 10 has two ports 11 respectively. Then the connection portion 1e corresponds to a plurality of ports 11, and when one of the two ports 11 of each heat exchange flow channel 10 is used for liquid inlet, the other is used for liquid outlet. For example, for a single heat exchange flow channel 10, the heat exchange medium flows into the heat exchange flow channel 10 from one of the ports 11 of the heat exchange flow channel 10, exchanges heat with the battery cells 100 when flowing through the flow channel in the heat exchange portion 1d, realizes temperature regulation of the battery cells 100, and the heat exchange medium after heat exchange is discharged through the other port 11 of the heat exchange flow channel 10; wherein, the form of the heat exchange medium is not specifically limited and can be gaseous, or liquid, or gas-liquid mixed state.

[0145] Please refer to Figure 4 and Figure 6 , the fixing beam 105 and / or the box body 101 are formed with an avoidance space 200a. The avoidance space 200a communicates the first cavity 101a and the second cavity 101b. Then the side of the avoidance space 200a facing the first cavity 101a is open, and the side of the avoidance space 200a facing the second cavity 101b is open. The connection portion 1e passes through the avoidance space 200a from the heat exchange portion 1d and extends to the second cavity 101b, so that the ports 11 of the heat exchange flow channel 10 are located in the second cavity 101b; it can be seen that the fixing beam 105 can separate the ports 11 of the heat exchange flow channel 10 from all the battery cells 100.

[0146] It can be understood that the avoidance space 200a can be defined solely by the fixed beam 105, or solely by the box body 101, or formed by the cooperation of the fixed beam 105 and the box body 101. For example, when the avoidance space 200a is defined solely by the fixed beam 105, the specific position of the avoidance space 200a can be set according to actual requirements. For instance, the orientation of the avoidance space 200a is open towards the side where the first heat exchange member 102 is located, and the wall of the box body 101 can block the open side of the avoidance space 200a. Or, the avoidance space 200a and the box body 101 are arranged to be completely separated from the wall of the first heat exchange member 102. Another example is that when the avoidance space 200a is defined solely by the box body 101, the wall of the box body 101 where the first heat exchange member 102 is arranged can form a recess, namely the second recess 101c described later, to define the avoidance space 200a, and the fixed beam 105 can be arranged on the open side of the avoidance space 200a. However, it is not limited to this.

[0147] In the above technical solution, an avoidance space 200a is formed in the fixed beam 105, and the connecting portion 1e passes through the avoidance space 200a from the heat exchange portion 1d and extends to the second cavity 101b, so that the port 11 of the heat exchange flow channel 10 is located in the second cavity 101b. This facilitates the assembly of the first heat exchange member 102 and the fixed beam 105, and enables the connecting portion 1e of the first heat exchange member 102 to extend to the second cavity 101b without being bent significantly around the fixed beam 105, which is beneficial to simplifying the structure of the first heat exchange member 102. At the same time, the setting of the above avoidance space 200a can make the ports 11 of the heat exchange flow channel 10 all located in the second cavity 101b, that is, the ports 11 of the heat exchange flow channel 10 and the battery cell 100 are separated by the fixed beam 105 and are located in different cavities respectively. This is convenient for the box body 101 to provide a suitable layout space for the connection between the first heat exchange member 102 and other components. At the same time, even if a heat exchange medium leakage occurs at the port 11 position of the first heat exchange member 102, the leaked heat exchange medium is not likely to flow to the position where the battery cell 100 is located immediately. Therefore, it is beneficial to reduce the influence of the heat exchange medium leakage at the port 11 position of the first heat exchange member 102 on the battery cell 100, and is convenient for improving the use reliability of the battery 200.

[0148] In addition, in the embodiments of the present application, the first heat exchanger 102, together with any one of the second heat exchanger 103 and the third heat exchanger 104 described below, can be configured to only cool the battery cell 100, or be configured to only heat the battery cell 100, or be configured to not only cool the battery cell 100 but also heat the battery cell 100. The two ports 11 of the heat exchange channel 10 are respectively a first port 11a and a second port 11b. The first port 11a is used for liquid inlet when in use, and the second port 11b is used for liquid outlet, or the second port 11b is used for liquid inlet and the first port 11a is used for liquid outlet; for a single heat exchange channel 10, the heat exchange channel 10 is configured such that one of the two ports 11 is always used for liquid inlet and the other is always used for liquid outlet; or each port 11 can be switched between being used for liquid inlet and being used for liquid outlet.

[0149] It should be noted that in the embodiments of the present application, the connecting portion 1e passes through the avoidance space 200a from the heat exchange portion 1d and extends to the second cavity 101b. It can be understood that: 1. The avoidance space 200a is configured to allow the connecting portion 1e to extend from the first cavity 101a through the avoidance space 200a to the second cavity 101b; 2. The avoidance space 200a is only used to accommodate and avoid a part of the connecting portion 1e, and it does not allow the connecting portion 1e to extend from the first cavity 101a through the avoidance space 200a to the second cavity 101b. For the first of the above-mentioned solutions, the requirements for the assembly sequence of the battery 200 are relatively low. For example, the box body 101 and the fixing beam 105 can be assembled first, and then the first heat exchanger 102 can be installed on the box body 101, or the box body 101 and the first heat exchanger 102 can be assembled first, and then the fixing beam 105 can be installed on the box body 101; for the second of the above-mentioned solutions, the box body 101 and the first heat exchanger 102 can be assembled first, and then the fixing beam 105 can be installed on the box body 101.

[0150] In the embodiments of the present application, the cross-sectional shape of the avoidance space 200a is not specifically limited. The cross-section of the avoidance space 200a is perpendicular to the direction from the first cavity 101a towards the second cavity 101b (for example, the cross-section of the avoidance space 200a is perpendicular to Figure 3in the second direction X2); for example, the fixed beam 105 is formed with a first recess 105a, the first recess 105a defines at least part of the avoidance space 200a, the first heat exchange member 102 is disposed on the wall of the box body 101, the cross-sectional shape of the first recess 105a is trapezoidal, the trapezoid has a top side, a bottom side and two waist sides connecting the top side and the bottom side, the included angle between each waist side and the top side is an obtuse angle, and the side of the first recess 105a facing the above-mentioned wall of the box body 101 corresponds to the bottom side of the trapezoid. Then, during the forming process of the first recess 105a, the top side and the waist sides of the trapezoid need to be machined on the fixed beam 105, and the waist sides and the top side form an obtuse angle, which facilitates the forming of the first recess 105a. Especially when the structural part of the first recess 105a corresponding to the fixed beam 105 includes at least one component and each component is an integrally stamped part, it is convenient for the machining of the first recess 105a.

[0151] In some embodiments, in addition to the battery cells 100, other components can also be provided in the first cavity 101a. For example, the fixed beam 105 is configured as a first expansion beam B1, and a second expansion beam B2 can also be provided in the first cavity 101a, and all the battery cells 100 are clamped between the first expansion beam B1 and the second expansion beam B2; for another example, the fixed beam 105 is configured as a first expansion beam B1, and a second expansion beam B2 and a third expansion beam B3 can also be provided in the first cavity 101a, the third expansion beam B3 is located between the first expansion beam B1 and the second expansion beam B2, and battery cells 100 are provided between the first expansion beam B1 and the third expansion beam B3, and battery cells 100 are also provided between the second expansion beam B2 and the third expansion beam B3.

[0152] It should be noted that the fixed beam 105 can be configured as an expansion beam, or can be configured as other beam structures in the box body 101 except the expansion beam, such as a partition beam.

[0153] Please refer to Figure 6 and Figure 9 , in some embodiments, the fixed beam 105 has a first recess 105a, and / or the wall of the box body 101 has a second recess 101c, and the first recess 105a and / or the second recess 101c constructs the avoidance space 200a. It can be seen that when the fixed beam 105 has the first recess 105a, the first recess 105a constructs at least part of the avoidance space 200a; when the wall of the box body 101 has the second recess 101c, the second recess 101c constructs at least part of the avoidance space 200a.

[0154] Exemplarily, the first heat exchange member 102 is disposed on the bottom wall 1011a of the box body 101: a first concave portion 105a is formed at the bottom of the fixed beam 105 and is recessed upward, and one side of the first concave portion 105a facing the bottom wall 1011a of the box body 101 is open; and / or, a second concave portion 101c is formed on the bottom wall 1011a of the box body 101 and is recessed downward, and the top side of the second concave portion 101c is open. There are also some examples where the first heat exchange member 102 is disposed on the top wall of the box body 101, the first concave portion 105a is formed on the top of the fixed beam 105 and is recessed downward, and one side of the first concave portion 105a facing the top wall of the box body 101 is open; of course, the first heat exchange member 102 can also be disposed on the surrounding wall 1011b of the box body 101, and the surrounding wall 1011b is disposed around the bottom wall 1011a and is connected between the bottom wall 1011a and the top wall of the box body 101.

[0155] In the above technical solution, by providing the first concave portion 105a and / or the second concave portion 101c, an avoidance space 200a is constructed, so that the avoidance space 200a is disposed between the box body 101 and the fixed beam 105. Then, the connecting portion 1e passing through the avoidance space 200a can be disposed closer to the wall of the box body 101 where the first heat exchange member 102 is provided, which is beneficial to reducing the distance between the connecting portion 1e and the heat exchange portion 1d in the normal direction of the above wall of the box body 101. Moreover, it is even beneficial to prevent the connecting portion 1e and the heat exchange portion 1d from being bent at the connecting position, which is beneficial to simplifying the structure of the first heat exchange member 102 and facilitating processing.

[0156] It can be understood that when the first concave portion 105a and the second concave portion 101c construct the avoidance space 200a, it is convenient to provide a larger space for the arrangement of the connecting portion 1e. When the battery 200 is configured to first assemble the box body 101 and the fixed beam 105 and then dispose the first heat exchange member 102 on the box body 101, a larger passing space can be provided between the box body 101 and the fixed beam 105 for the assembly of the connecting portion 1e, which is convenient for the connecting portion 1e to quickly align with the avoidance space 200a between the box body 101 and the beam, and is beneficial to improving the assembly convenience of the first connecting member; moreover, the size of at least one of the first concave portion 105a and the second concave portion 101c can be set to be smaller, which is convenient for reducing the weakening effect of the first concave portion 105a on the fixed beam 105 and / or reducing the forming difficulty of the second concave portion 101c. In addition, the setting of the second concave portion 101c does not affect the sealing performance of the structure of the box body 101 itself.

[0157] It should be noted that the orientation or positional relationship indicated by "top", "bottom", "upper", "lower", etc. described in this article is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application. For example, in Figure 2 In the illustrated embodiment, the housing 101 includes a first housing 1011 and a second housing 1012. The second housing 1012 is disposed on top of the first housing 1011. The bottom wall 1011a of the housing 101 may be formed on the first housing 1011, and the top wall of the housing 101 may be formed on the second housing 1012. In actual use, the battery 200 may be placed upright with the second housing 1012 disposed on top of the first housing 1011, or the battery 200 may be inverted with the second housing 1012 disposed at the bottom of the first housing 1011.

[0158] Please refer to Figure 3 and Figure 6 , in some embodiments, the avoidance space 200a is configured to allow the connecting portion 1e to pass through.

[0159] In the above technical solution, by setting the avoidance space 200a to be configured to allow the connecting portion 1e to pass through, that is, the avoidance space 200a allows the connecting portion 1e to pass through, then the avoidance space 200a can allow the connecting portion 1e to extend from the first chamber 101a through the avoidance space 200a to the second chamber 101b. Then, when assembling the battery 200, the assembly method of "first assembling the housing 101 and the fixing beam 105, and then installing the first heat exchange member 102 on the housing 101" can be selected. This assembly method is particularly suitable for the setting of "after the fixing beam 105 and the housing 101 are assembled and then electrophoresed together to form a protective film, and then the first heat exchange member 102 is installed", which is beneficial to improving the assembly convenience.

[0160] It can be understood that when the material of the fixing beam 105 itself has a certain corrosion resistance, the requirement for the assembly sequence of the housing 101, the fixing beam 105, and the first heat exchange member 102 is relatively low. The housing 101 and the fixing beam 105 can be assembled first, and then the first heat exchange member 102 can be installed on the housing 101. Or the housing 101 and the first heat exchange member 102 can be assembled first, and then the fixing beam 105 can be installed on the housing 101. When the corrosion resistance of the material of the fixing beam 105 itself is poor, the housing 101 and the fixing beam 105 can be assembled first, and after electrophoresis of the two together, the first installation member can be installed on the housing 101.

[0161] Please refer to Figures 6 - 9, in some embodiments, the portion of the first heat exchanger 102 located in the first chamber 101a (hereinafter referred to as the first portion) and the portion located in the second chamber 101b (hereinafter referred to as the second portion) are connected at an obtuse angle, that is, the bending connection angle α between the portion of the first heat exchanger 102 located in the first chamber 101a and the portion of the first heat exchanger 102 located in the second chamber 101b is an obtuse angle.

[0162] Exemplarily, the heat exchange portion 1d of the first heat exchanger 102 can be configured as the first portion, and a part of the connection portion 1e of the first heat exchanger 102 can be configured as the second portion; or, a part of the connection portion 1e and the heat exchange portion 1d together can be configured as the first portion, and another part of the connection portion 1e can be configured as the second portion.

[0163] In the above technical solution, by setting the portions of the first heat exchanger 102 located on the opposite sides of the fixed beam 105 to be connected at an obtuse angle, during the assembly process of the first heat exchanger 102, the first portion first aligns with the avoidance space 200a. At this time, the second portion is disposed approximately obliquely. As the first portion is inserted, the inclination angle of the second portion gradually decreases until the first portion passes through the avoidance space 200a to complete the insertion of the first heat exchanger 102. At this time, it is convenient for the heat exchange portion 1d of the first heat exchanger 102 to be in contact with the corresponding wall of the box body 101, facilitating the insertion of the first heat exchanger 102 and being beneficial to improving the installation convenience of the first heat exchanger 102; moreover, the above assembly method is particularly applicable to the case where the occupied space of the heat exchange portion 1d on the corresponding wall of the box body 101 is relatively large. For example, the heat exchange portion 1d is configured such that in the direction from the first chamber 101a towards the second chamber 101b (for example Figure 8 the X2 direction in, the width direction of the fixed beam 105), the length of the first heat exchanger 102 is greater than or equal to the length of the first chamber 101a. At this time, the first heat exchanger 102 cannot be directly disposed on the corresponding wall along the normal direction of the corresponding wall of the box body 101. The above assembly method in the scheme can be utilized to achieve the smooth installation of the first heat exchanger 102, and at the same time, it is beneficial to increase the heat exchange area of the heat exchange portion 1d.

[0164] Of course, in the above scheme, other assembly methods can also be selected during the assembly of the battery 200. For example, the box body 101 and the first heat exchanger 102 are first assembled, and then the fixed beam 105 is installed on the box body 101.

[0165] In addition, in other embodiments of the present application, the portion of the first heat exchanger 102 located in the first chamber 101a and the portion located in the second chamber 101b can also be connected at a straight angle, that is, the angle α is a straight angle, as shown in the figure.

[0166] Please refer to Figure 3 、 Figure 4 and Figure 6, in some embodiments, the battery 200 further includes a current collector 2. The current collector 2 is in communication with the port 11 of the connecting portion 1e, and the current collector 2 is located in the second chamber 101b.

[0167] In the above technical solution, by setting the current collector 2 to be in communication with the port 11, the heat exchange medium flows through the current collector 2 to the heat exchange channel 10, and / or the heat exchange medium after heat exchange in the heat exchange channel 10 flows through the port 11 into the current collector 2, facilitating the realization of the circulating flow of the heat exchange medium; since the current collector 2 is located in the second chamber 101b, the communication position between the current collector 2 and other components except the first heat exchange member 102 is also located in the second chamber 101b. Even if the heat exchange medium leaks at the communication position between the current collector 2 and the above other components, the leaked heat exchange medium is not likely to flow into the first chamber 101a where the battery cell 100 is located immediately, which is beneficial to reducing the impact of the heat exchange medium leakage at the current collector 2 on the battery cell 100 and improving the use reliability of the battery 200.

[0168] Please refer to Figure 6 、 Figure 8 and Figure 9 , in some embodiments, the avoidance space 200a is configured to allow the current collector 2 to pass through.

[0169] For example, after the fixed beam 105 and the box body 101 are assembled, when the first heat exchange member 102 and the current collector 2 are connected and assembled to the box body 101, the current collector 2 can move from the first chamber 101a to the second chamber 101b through the above avoidance space 200a.

[0170] In the above technical solution, by setting the avoidance space 200a to be configured to allow the current collector 2 to pass through, the avoidance space 200a can allow the current collector 2 to move from the first chamber 101a to the second chamber 101b through the avoidance space 200a. Then, when assembling the battery 200, an assembly method of "first assembling the box body 101 and the fixed beam 105, assembling the first heat exchange member 102 and the current collector 2, and then assembling the assembled first heat exchange member 102 and current collector 2 to the box body 101" can be selected. This assembly method is particularly suitable for the setting of "after the fixed beam 105 and the box body 101 are assembled, the two are electrophoresed together to form a protective film, and then the first heat exchange member 102 is installed", which is beneficial to taking into account both the assembly convenience and the protection ability of the battery 200.

[0171] It can be understood that, generally, in a plane perpendicular to the direction from the first chamber 101a towards the second chamber 101b, the orthographic projection of the connecting portion 1e is within the outer contour range of the orthographic projection of the current collector 2. Then, if the current collector 2 can pass through the avoidance space 200a between the box body 101 and the fixed beam 105, the connecting portion 1e can also pass through the avoidance space 200a.

[0172] Optionally, the fixed beam 105 has a first recess 105a that defines an avoidance space 200a and is configured to allow the current collector 2 to pass through; alternatively, the box body 101 has a second recess 101c that defines an avoidance space 200a and is configured to allow the current collector 2 to pass through; or, the first recess 105a of the fixed beam 105 and the second recess 101c of the box body 101 define an avoidance space 200a, and the current collector 2 can pass through the space formed by the cooperation of the first recess 105a and the second recess 101c.

[0173] Please refer to Figure 3 and Figure 4 , in some embodiments, the connecting portion 1e has at least two ports 11. The current collector 2, the connecting portion 1e, and the avoidance space 200a correspond to each other one by one, and the current collector 2 corresponds to at least two of the multiple ports 11 of the first heat exchange member 102. It can be understood that for a single current collector 2, the multiple ports 11 corresponding thereto may belong to the same heat exchange channel 10 or different heat exchange channels 10.

[0174] It can be seen that the first heat exchange member 102 may include one or more connecting portions 1e, and the multiple ports 11 corresponding to a single connecting portion 1e may belong to the same heat exchange channel 10 or different heat exchange channels 10.

[0175] Wherein, the current collector 2 communicates with multiple ports 11 of the corresponding connecting portion 1e. At this time, the multiple ports 11 corresponding to the current collector 2 may all be used for liquid inlet or all for liquid outlet, and the multiple ports 11 corresponding to the current collector 2 may belong to different heat exchange channels 10 respectively; or, the current collector 2 divides the multiple ports 11 of the corresponding connecting portion 1e into multiple independent flow channels. At this time, at least one of the multiple ports 11 corresponding to the current collector 2 is used for liquid inlet and at least one is used for liquid outlet, and the multiple ports 11 corresponding to the current collector 2 may belong to the same heat exchange channel 10 or different heat exchange channels 10.

[0176] It can be understood that when the current collector 2 divides the above-mentioned multiple ports 11 of the corresponding connecting portion 1e into multiple independent flow channels, the current collector 2 defines multiple independent flow channels, and each flow channel may communicate with at least one port 11; exemplarily, the current collector 2 defines two independent flow channels, namely a first flow channel and a second flow channel. The first flow channel communicates with all the ports 11 for liquid inlet among the above-mentioned at least two ports 11, and the second flow channel communicates with all the flow channels for liquid outlet among the above-mentioned at least two ports 11; of course, three flow channels may also be defined in the current collector 2, where two flow channels are both used for liquid inlet of the corresponding ports 11, and the remaining one flow channel is used for liquid outlet of the corresponding ports 11.

[0177] In the above technical solution, by setting the current collectors 2 in one-to-one correspondence with the avoidance spaces 200a, and making the current collectors 2 correspond to at least two ports 11, on the premise that the liquid inlet and outlet of the heat exchange flow channel 10 are realized through the current collectors 2, the avoidance spaces 200a can correspond to at least two ports 11, which is beneficial to reducing the number of avoidance spaces 200a, simplifying the processing procedure of the fixed beam 105, and facilitating the processing of the fixed beam 105.

[0178] It can be understood that when the current collectors 2 are in one-to-one correspondence with the avoidance spaces 200a, the number, arrangement spacing, etc. of the current collectors 2 and the avoidance spaces 200a can be matched. On the premise of realizing the smooth assembly of the current collectors 2, it is beneficial to reduce the sum of the opening sizes of all the avoidance spaces 200a, facilitate reducing the weakening effect on the fixed beam 105 caused by opening the avoidance spaces 200a, and / or reduce the processing complexity of the box body 101 caused by opening the avoidance spaces 200a.

[0179] Please refer to Figure 3 、 Figure 4 and Figure 17 In some embodiments, there are multiple heat exchange flow channels 10. The two ports 11 of each heat exchange flow channel 10 are respectively a first port 11a and a second port 11b. The first port 11a is used for liquid inlet, and the second port 11b is used for liquid outlet.

[0180] Among them, there are two current collectors 2, and the two current collectors 2 are respectively a first current collector 21 and a second current collector 22. The first ports 11a of all the heat exchange flow channels 10 are all connected to the first current collector 21, and the second ports 11b of all the heat exchange flow channels 10 are all connected to the second current collector 22. Then, one of the first current collector 21 and the second current collector 22 is used for liquid inlet, and the other is used for liquid outlet. There is no need to set multiple separated flow channels in each current collector 2, which is beneficial to simplifying the structure of the current collector 2. At the same time, since both ends of all the heat exchange flow channels 10 are respectively connected to the first current collector 21 and the second current collector 22, it is beneficial to reduce the number of current collectors 2 to a certain extent.

[0181] Alternatively, there is one current collector 2, and the current collector 2 has two separated and independently arranged flow channels. The first ports 11a of all the heat exchange flow channels 10 are all connected to one of the flow channels, and the second ports 11b of all the heat exchange flow channels 10 are all connected to the other flow channel. Then, one current collector 2 realizes the medium flow of all the heat exchange flow channels 10, reduces the number of current collectors 2, and thus can reduce the number of avoidance spaces 200a, reduce the processing difficulty, and save the processing procedure.

[0182] Of course, in other embodiments, there can also be one heat exchange flow channel 10. At this time, the current collector 2 can be one or two, and the specific setting is the same as the above scheme, which will not be elaborated here.

[0183] In the above technical solution, whether the current collector 2 is one or two, it is convenient to use a small number of current collectors 2 to realize the circulation of the media in all the heat exchange channels 10, which can reduce the number of avoidance spaces 200a and is beneficial to reducing the processing difficulty and saving the processing procedures.

[0184] Please refer to Figure 5 , Figure 6 and Figure 11 , in some embodiments, the fixed beam 105 is configured as the first expansion beam B1, and the fixed beam 105 has a first mating surface 105b that abuts against the battery cell 100. At this time, the fixed beam 105 is used to bear the expansion force of the battery cell 100; the battery 200 further includes a bearing member 106, the bearing member 106 is disposed in the avoidance space 200a, and the bearing member 106 has a second mating surface 106a that abuts against the battery cell 100. The first mating surface 105b and the second mating surface 106a are flush with each other. For example, the first mating surface 105b and the second mating surface 106a may be located in the same plane; the bearing member 106 has a slot 106b for avoiding the connecting portion 1e, and the slot 106b penetrates the outer peripheral side of the bearing member 106.

[0185] It can be understood that the first mating surface 105b can be in direct contact with the battery cell 100, or the first mating surface 105b indirectly abuts against the battery cell 100; similarly, the second mating surface 106a can be in direct contact with the battery cell 100, or the second mating surface 106a indirectly abuts against the battery cell 100. The slot 106b on the bearing member 106 can be one or more. For example, the first heat exchange member 102 includes at least one heat exchange tube 1, a heat exchange channel 10 is defined in the heat exchange tube 1, and ports 11 are respectively formed at two end portions of the heat exchange tube 1. The slot 106b is used to avoid one or more end portions; when the slot 106b is used to avoid a plurality of end portions, the plurality of end portions can belong to the same heat exchange tube 1 or different heat exchange tubes 1.

[0186] In the above technical solution, by arranging the carrier 106 in the avoidance space 200a, and making the second mating surface 106a of the carrier 106 flush with the first mating surface 105b of the fixed beam 105, the carrier 106 can bear the expansion force of the battery cell 100 together with the fixed beam 105, which is conducive to reducing the deformation difference of the battery cell 100 at the position of the avoidance space 200a and other positions offset from the first avoidance space 200a, and is conducive to reducing the deformation difference of the battery cell 100 at different positions due to excessive deformation. While it is easy to cause the risk of lithium deposition, it is also beneficial to reduce the risk of shell rupture and electrolyte leakage due to uneven force on the battery cell 100, thereby improving the reliability of the battery 200; moreover, since the groove 106b runs through the outer peripheral side of the supporting member 106, not only can the groove 106b avoid the corresponding connecting part 1e, but it is also convenient to install the supporting member 106 to the avoidance space 200a after the first heat exchange member 102 and the fixed beam 105 are installed, so as to achieve the smooth installation of the supporting member 106.

[0187] It can be understood that when the avoidance space 200a is located between the box body 101 and the fixed beam 105, the bearing member 106 can cooperate with the box body 101 and the fixed beam 105 respectively.

[0188] Please refer to Figure 6 and Figure 10 In some embodiments, at least one of the fixed beam 105 and the box body 101 is formed with a stopper 106c that abuts against the carrier 106 to limit the movement of the carrier 106 from the first cavity 101a toward the second cavity 101b. It can also be understood that the stopper 106c is in direct contact with the carrier 106, or the stopper 106c abuts against the carrier 106 indirectly.

[0189] In the above technical solution, a stopper 106c is formed on at least one of the fixed beam 105 and the box body 101 to limit the movement of the carrier 106 in the direction from the first cavity 101a to the second cavity 101b, so as to realize the carrier 106 in the width direction of the fixed beam 105 (for example, Figure 3A reliable limit in the second direction X2), and at the same time, the stop portion 106c can resist the expansion force exerted by the battery cell 100 on the carrier 106, which is beneficial to improving the load-bearing capacity of the carrier 106 so that the carrier 106 can stably bear the expansion force of the battery cell 100 and reduce the probability of the carrier 106 moving towards the second cavity 101b under the action of the battery cell 100; moreover, if at least one of the fixed beam 105 and the box body 101 is also fixedly connected to the carrier 106 in other ways, such as bonding at least one of the fixed beam 105 and the box body 101 to the carrier 106, the above solution is beneficial to reducing the acting force borne by other connection methods between at least one of the fixed beam 105 and the box body 101 and the carrier 106, and is beneficial to improving the setting reliability and stability of the carrier 106.

[0190] Please refer to Figure 6 and Figure 10 , in some embodiments, a stop portion 106c is formed on one side of the fixed beam 105 facing the first cavity 101a at the position of the avoidance space 200a, that is, one end of the portion of the fixed beam 105 corresponding to the avoidance space 200a facing the first cavity 101a is formed as the stop portion 106c. For example, when the fixed beam 105 has the first recess 105a, a stop portion 106c is formed at one end of the first recess 105a facing the first cavity 101a; and / or, when the box body 101 has the second recess 101c, a stop portion 106c is formed at one end of the portion of the fixed beam 105 corresponding to the second recess 101c facing the first cavity 101a; and / or, a stop step 1011c protruding towards the fixed beam 105 is formed on the wall of the box body 101 where the first heat exchange member 102 is arranged, and the stop step 1011c is formed as the stop portion 106c.

[0191] In the above technical solution, a stop portion 106c is formed on one side of the fixed beam 105 facing the first cavity 101a at the position of the avoidance space 200a, which facilitates using the structure of the fixed beam 105 itself to define the stop portion 106c to realize the limit of the carrier 106 without separately setting it additionally, which is beneficial to simplifying the structure of the fixed beam 105. At the same time, the stop portion 106c is located on one side of the fixed beam 105 facing the first cavity 101a, which is convenient to match with the installation method of the carrier 106 "cooperating with the avoidance space 200a along the direction from the first cavity 101a to the second cavity 101b", so that the stop portion 106c does not interfere with the assembly of the carrier 106, which is beneficial to improving the assembly convenience; by setting that the wall of the box body 101 forms a stop step 1011c protruding towards the fixed beam 105, and the stop step 1011c forms the stop portion 106c, it is convenient to use the structure of the box body 101 itself to define the stop portion 106c to realize the limit of the carrier 106 without separately setting it additionally, which is beneficial to simplifying the structure of the box body 101. At the same time, the setting of the stop step 1011c does not affect the sealing performance of the structure of the box body 101 itself.

[0192] Exemplarily, the first recess 105a of the fixed beam 105 constructs at least part of the avoidance space 200a, and one end of the first recess 105a facing the first cavity 101a forms the stop portion 106c, which is beneficial to increasing the cooperation area between the fixed beam 105 and the carrier 106 and facilitating further improving the setting reliability and load-bearing capacity of the carrier 106; and / or, a concave second recess 101c is formed on the wall of the box body 101 where the first heat exchange member 102 is arranged, and the stop step 1011c is formed on the groove wall of the second recess 101c.

[0193] Please refer to Figure 6 , in some embodiments, in the cross-section of the fixed beam 105, the stop portion 106c on the fixed beam 105 forms an arc structure, and the cross-section of the fixed beam 105 is in the length direction of the fixed beam 105 (for example Figure 3 the first direction X1 in

[0194] In the above technical solution, by setting the stop portion 106c on the cross-section of the fixed beam 105 to be formed into an arc structure, so that while the stop portion 106c can limit the movement of the bearing member 106, it can also achieve a certain degree of avoidance of the part of the bearing member 106 that cooperates with the stop portion 106c. At the same time, combined with the fact that the stop portion 106c is located on the side of the fixed beam 105 facing the first cavity 101a, it is convenient to improve the problem that the bearing member 106 is prone to protrude from the first mating surface 105b towards the first cavity 101a due to cooperation with the stop portion 106c, and it is convenient to achieve the flush setting of the second mating surface 106a and the first mating surface 105b. In addition, when the part of the fixed beam 105 corresponding to the stop portion 106c is an integrally formed bent plate, the stop portion 106c can be located at the bending position of the plate, so that the stop portion 106c can be directly formed during the forming process of the bent plate, which is beneficial to saving the processing procedures of the fixed beam 105, reducing the processing difficulty, and improving the production efficiency.

[0195] Please refer to Figure 6 and Figure 7 , in some embodiments, the bearing member 106 includes a plate body portion 1061 and a mating portion 1062. One surface of the thickness side of the plate body portion 1061 is formed as the second mating surface 106a, then the second mating surface 106a is located on the side of the plate body portion 1061 facing the first cavity 101a, and the slot 106b penetrates through both sides of the thickness of the plate body portion 1061; the mating portion 1062 is formed at the outer edge of the plate body portion 1061, and the mating portion 1062 is in abutting cooperation with the fixed beam 105 to limit the movement of the bearing member 106 along the direction of the first cavity 101a towards the second cavity 101b. For example, the mating portion 1062 is in abutting cooperation with the stop portion 106c on the fixed beam 105.

[0196] In the above technical solution, by setting the bearing member 106 to include a plate body portion 1061 and a mating portion 1062, it is convenient for the plate body portion 1061 to provide a relatively large and flat second mating surface 106a, improving the shielding ability of the bearing member 106 for the avoidance space 200a, and the mating portion 1062 can realize the limiting of the bearing member 106, achieving the reliable installation of the bearing member 106, so that the bearing member 106 has a certain ability to withstand the expansion force of the battery cell 100. At the same time, the structure of the bearing member 106 is simple and easy to implement; in addition, since the mating portion 1062 is in abutting cooperation with the fixed beam 105, then if the fixed beam 105 undergoes a certain deformation under the action of the battery cell 100, resulting in the first mating surface 105b deviating from its original position and / or original posture, it is convenient for the mating portion 1062 to adapt to the deformation of the fixed beam 105, so that the second mating surface 106a of the bearing member 106 can be adjusted accordingly with the change of the first mating surface 105b, which is convenient to make the second mating surface 106a and the first mating surface 105b always flush or have a very small misalignment to a certain extent.

[0197] It can be understood that when the supporting member 106 includes a plate body portion 1061 and a matching portion 1062, if the box body 101 is also formed with a stop portion 106c, the plate body portion 1061 can be stopped and matched with the stop portion 106c on the box body 101; of course, if the supporting member 106 also includes the supporting portion 1064 described below, the stop portion 106c on the box body 101 can be stopped and matched with the supporting portion 1064.

[0198] Please refer to Figure 6 and Figure 7 In some embodiments, the mating portion 1062 has a first surface 1062a and a second surface 1062b, the first surface 1062a is formed as an arc-shaped surface recessed toward the second surface 1062b and the first surface 1062a is matched with the fixed beam 105, the second surface 1062b is connected to the first surface 1062a, and the second surface 1062b is flush with the second mating surface 106a, and the second surface 1062b and the second mating surface 106a can be located in the same plane.

[0199] In the above technical solution, the first surface 1062a of the mating portion 1062 is arranged to be in abutment with the fixed beam 105. Due to the arc-shaped setting of the first surface 1062a, it is convenient to achieve the limited matching of the carrier 106 and the fixed beam 105, and at the same time, it is convenient to prevent the second surface 1062b from protruding out of the second mating surface 106a toward the first cavity 101a, and will not affect the matching of the second mating surface 106a with the battery cell 100; of course, the second surface 1062b can also be in abutment with the battery cell 100.

[0200] Exemplarily, the first surface 1062 a of the matching portion 1062 is abutted against the stop portion 106 c of the fixed beam 105 , and in the cross section of the fixed beam 105 , the first surface 1062 a and the stop portion 106 c are both formed into an arc shape.

[0201] Please refer to Figure 7 , Figure 14 and Figure 15 In some embodiments, at least one latch hole 200d is formed on the fixed beam 105, and the carrier 106 also includes at least one hook portion 1063, which is formed at the outer edge of the plate body 1061, and the hook portion 1063 is located on the side of the plate body 1061 that is away from the second mating surface 106a. The hook portion 1063 is clamped in the corresponding latch hole 200d, and the hook portion 1063 and the mating portion 1062 can be located on the same side of the plate body 1061, and both are located on the side of the plate body 1061 facing the fixed beam 105.

[0202] Exemplarily, the first heat exchange member 102 is arranged on the bottom wall 1011a of the box body 101, the fixed beam 105 is arranged on the upper side of the bottom wall 1011a of the box body 101, and a card hole 200d is formed on the portion of the fixed beam 105 corresponding to the avoidance space 200a, and a portion of the hook portion 1063 extends upward into the card hole 200d.

[0203] In the above technical solution, by setting the hook portion 1063 of the carrier 106 to be clamped in the clamping hole 200d on the fixed beam 105, it is convenient to realize the movement of the carrier 106 in the direction from the second cavity 101b toward the first cavity 101a, which is beneficial to further improve the installation reliability of the carrier 106 and improve the problem that the carrier 106 is easy to leave the avoidance channel along the direction from the second cavity 101b to the first cavity 101a during the assembly of the battery 200. For example, the above setting can realize the pre-limitation of the carrier 106, which is beneficial to further improve the assembly efficiency of the battery 200.

[0204] Optionally, for a single clamping hole 200d, the clamping hole 200d may correspond to one or more clamping hooks 1063, and the number of the clamping holes 200d may be equal to or different from the number of the clamping hooks 1063. Exemplarily, a plurality of clamping hooks 1063 are arranged at intervals along the length direction of the fixed beam 105 to improve the reliability of the pre-limiting of the carrier 106.

[0205] Optionally, the hook portion 1063 is configured as an elastic hook portion 1063. In this case, the hook portion 1063 may include a cantilever portion and a hook portion. The cantilever portion extends along the direction from the first cavity 101a toward the second cavity 101b, one end of the cantilever portion is connected to the plate body portion 1061, and the hook portion is arranged at the other end of the cantilever portion. Then, during the assembly process of the supporting component 106, the direction from the first cavity 101a toward the second cavity 101b cooperates with the avoidance space 200a, the hook portion 1063 is squeezed and deformed by the fixed beam 105, and the supporting component 106 continues to move toward the second cavity 101b until the hook portion 1063 is hooked in the hook hole 200d.

[0206] Please refer to Figure 7 , Figure 14 and Figure 15 In some embodiments, the carrier 106 further includes at least one supporting portion 1064 , which is disposed on a side of the plate portion 1061 away from the second mating surface 106 a , and the supporting portion 1064 is disposed to avoid the slot 106 b , and the supporting portion 1064 is stop-fitted with the box body 101 .

[0207] The support portion 1064 is arranged to avoid the slot 106 b , which can be understood as, in the thickness direction of the plate body 1061 , the orthographic projection of the support portion 1064 is located outside the outer contour of the orthographic projection of the slot wall of the slot 106 b .

[0208] In the above technical solution, by providing the support portion 1064, it is convenient to strengthen the plate portion 1061, improve the structural strength of the carrier 106, and the support portion 1064 does not affect the abutting fit between the plate portion 1061 and the battery cell 100; and the support portion 1064 abuts against the box body 101, which is convenient to disperse the force exerted by the battery cell 100 on the carrier 106 to the box body 101 through the support portion 1064, which is beneficial to further improve the installation reliability and load-bearing capacity of the carrier 106. Moreover, the carrier 106 is respectively fitted with the fixed beam 105 and the box body 101 through the fitting portion 1062 and the support portion 1064, which is convenient to make the entire plate portion 1061 receive relatively balanced support and limitation. At the same time, since the support portion 1064 is provided by avoiding the slot 106b, the setting of the support portion 1064 will not interfere with the connecting portion 1e, which is convenient to realize the convenient assembly of the carrier 106.

[0209] Optionally, the support portion 1064 can be configured such that the support portion 1064 abuts against the box body 101 in the direction from the first cavity 101a towards the second cavity 101b, and / or the support portion 1064 abuts against the box body 101 in the thickness direction of the first heat exchanger 102 (for example Figure 7 the third direction X3 in Figure 7 and 10 ), that is, on the normal of the wall of the box body 101 where the first heat exchanger 102 is provided; for example, in combination with

[0210] the bottom wall 1011a of the box body 101 is provided with the first heat exchanger 102, the fixed beam 105 is provided on the upper side of the bottom wall 1011a of the box body 101, the first cavity 101a and the second cavity 101b are arranged in sequence along the third direction X3, the support portion 1064 can abut against the bottom wall 1011a of the box body 101 in the second direction X2 (for example, the support portion 1064 abuts against the stop step 1011c on the box body 101), and / or the support portion 1064 abuts against the bottom wall 1011a of the box body 101 in the third direction X3.

[0210] Exemplarily, there are multiple support portions 1064, and at least one support portion 1064 is provided on each side of each slot 106b in the length direction of the fixed beam 105 (for example Figure 1 the first direction X1 in

[0211] Please refer to Figure 7 、 Figure 11 、 Figure 14 and Figure 15 , in some embodiments, the width of the support portion 1064 in the thickness direction of the plate portion 1061 increases from the fitting portion 1062 towards the direction of the first heat exchanger 102, so the width of the end of the support portion 1064 facing the wall of the box body 101 where the first heat exchanger 102 is provided is the largest, and the width of the end of the support portion 1064 facing the fitting portion 1062 is the smallest.

[0212] Exemplarily, the first heat exchanger 102 is disposed between the bottom wall 1011a of the box body 101 and the battery cell 100. The fixed beam 105 is disposed above the bottom wall 1011a. The width of the support portion 1064 in the thickness direction of the plate body portion 1061 increases from top to bottom. For example, the support portion 1064 is generally formed in a triangular plate-like structure.

[0213] In the above technical solution, by setting the width of the support portion 1064 in the thickness direction of the plate body to increase in the direction from the fitting portion 1062 toward the first heat exchanger 102, it is convenient to increase the abutting and fitting area between the support portion 1064 and the box body 101 with a relatively small amount of material used, improve the fitting reliability between the support portion 1064 and the box body 101, and achieve the simultaneous consideration of cost and load-bearing reliability.

[0214] Exemplarily, when the carrier 106 includes a plate body portion 1061, a fitting portion 1062, a hook portion 1063, and a support portion 1064, the fitting portion 1062 and the hook portion 1063 are located on the same side of the plate body portion 1061, and the hook portion 1063 and the support portion 1064 can be located on opposite sides of the plate body portion 1061. Then, while realizing the limit of the carrier 106 in the width direction of the fixed beam 105, the rotation of the carrier 106 can also be restricted, which is beneficial to improving the stability of the carrier 106 abutting against the battery cell 100.

[0215] In some embodiments, the carrier 106 is disposed between the first heat exchanger 102 and the fixed beam 105, so that the first heat exchanger 102 and the fixed beam 105 are separated by the carrier 106. At this time, the opening 106b faces the side of the wall of the box body 101 where the first heat exchanger 102 is disposed and is open. Among them, the thermal conductivity of the carrier 106 is lower than that of the fixed beam 105; and / or, the carrier 106 is spaced apart from the first heat exchanger 102.

[0216] Exemplarily, the first heat exchanger 102 is disposed on the bottom wall 1011a of the box body 101, the fixed beam 105 is disposed above the bottom wall 1011a of the box body 101, the carrier 106 is disposed in the avoidance space 200a, the lower side of the opening 106b is open, and the connecting portion 1e passes through the opening 106b. Then, the carrier 106 can separate the connecting portion 1e from the fixed beam 105.

[0217] In the above technical solution, the carrier 106 is arranged between the first heat exchanger 102 and the fixed beam 105. At the same time, the thermal conductivity of the carrier 106 is lower than that of the fixed beam 105, and / or the carrier 106 is spaced apart from the first heat exchanger 102, which is beneficial to increasing the thermal resistance between the first heat exchanger 102 and the fixed beam 105, reducing the heat exchange amount between the expansion beam and the first heat exchanger 102, and to a certain extent, is beneficial to increasing the proportion of the heat or cold transferred from the first heat exchanger 102 to the battery cell 100, and improving the thermal management performance. In addition, when the carrier 106 is spaced apart from the first heat exchanger 102, the risk of interference between the carrier 106 and the first heat exchanger 102 can be reduced during the assembly of the carrier 106, and the installation convenience of the carrier 106 can be improved.

[0218] In some embodiments, the strength of the material of the carrier 106 is at least 0.8 times that of the material of the fixed beam 105. For example, the strength of the material of the carrier 106 is 0.8 times, 0.85 times, 0.9 times, 1 time, etc. of the strength of the material of the fixed beam 105.

[0219] Optionally, the material of the carrier 106 and the material of the fixed beam 105 may be the same or different. For example, the fixed beam 105 is a metal part and the carrier 106 is a plastic part, but it is not limited thereto.

[0220] In the above technical solution, by setting the strength of the material of the carrier 106 to be at least 0.8 times that of the material of the fixed beam 105, it is convenient for the carrier 106 itself to have good load-bearing capacity, so that the carrier 106 can reliably and stably bear the expansion force of the battery cell 100.

[0221] Please refer to Figure 6 , in some embodiments, the first heat exchanger 102 is arranged on the bottom wall 1011a of the box body 101, and one end of the second mating surface 106a facing the first heat exchanger 102 is flush with one end of the battery cell 100 facing the corresponding first heat exchanger 102, or one end of the second mating surface 106a facing the first heat exchanger 102 is arranged adjacent to the first heat exchanger 102 compared with one end of the battery cell 100 facing the corresponding first heat exchanger 102.

[0222] It can be seen that when the first heat exchanger 102 is arranged below the battery cell 100, the lower end of the second mating surface 106a is flush with the lower end of the battery cell 100, or the lower end of the second mating surface 106a is located below the lower end of the battery cell 100.

[0223] In the above technical solution, by setting the end of the second mating surface 106a facing the first heat exchanger 102 to be flush with the end of the battery cell 100 facing the first heat exchanger 102, or by setting the end of the second mating surface 106a facing the first heat exchanger 102 to be adjacent to the first heat exchanger 102 compared with the end of the battery cell 100 facing the first heat exchanger 102, it is convenient to support the entire surface of the battery cell 100 facing the fixed beam 105, which is convenient to improve the uniformity of the force when the battery cell 100 expands and deforms, and to improve problems such as lithium plating and liquid leakage caused by uneven force, thereby improving the use reliability of the battery 200.

[0224] Please refer to Figure 16 and Figure 17 , in some embodiments, the fixed beam 105 is configured as the first expansion beam B1, and the fixed beam 105 is spaced from the first heat exchanger 102 so that heat insulation is provided between the first heat exchanger 102 and the fixed beam 105. It can be seen that the fixed beam 105 is spaced from the heat exchange part 1d, then the surface of the fixed beam 105 facing the first cavity 101a is spaced from the heat exchange part 1d, and at the same time the fixed beam 105 is spaced from the connecting part 1e, then the wall surface of the avoidance space 200a is spaced from the connecting part 1e.

[0225] Generally, when there are multiple battery cells 100, the outer battery cells 100 surround the inner battery cells 100. The heat exchange area of the outer battery cells 100 is usually larger than that of the inner battery cells 100, resulting in a certain temperature difference between the outer battery cells 100 and the inner battery cells 100; in the related art, there is no heat insulation between the heat exchanger for the battery cell 100 and the expansion beam, so that a certain degree of heat exchange can occur between the above heat exchanger and the expansion beam. Then, the temperature of the expansion beam is greatly affected by the heat exchanger, which will cause the temperature of the expansion beam to be lower than that of the outer battery cells 100 when the heat exchanger cools the battery cell 100, and the temperature of the expansion beam to be higher than that of the outer battery cells 100 when the heat exchanger heats the battery cell 100. At this time, the temperature difference between the outer battery cells 100 and the inner battery cells 100 will be further aggravated.

[0226] Therefore, in the above technical solution, by setting heat insulation between the first heat exchanger 102 and the fixed beam 105, the thermal resistance between the first heat exchanger 102 and the fixed beam 105 is increased, which is beneficial to reducing the heat or cold transferred from the first heat exchanger 102 to the fixed beam 105, and is beneficial to reducing the temperature difference between the fixed beam 105 and the outer battery cell 100 that abuts against it, which is convenient to improve the consistency of the heat exchange environment between the outer battery cell 100 and the inner battery cell 100, and thus is beneficial to reducing the temperature difference between the outer battery cell 100 and the inner battery cell 100 and improving the reliability of the battery 200.

[0227] Please refer to Figure 19 and Figure 22 , in some embodiments, a second recess 101c is formed in the wall of the box body 101. The second recess 101c constructs at least part of the avoidance space 200a, and the part of the first heat exchanger 102 passing through the avoidance space 200a is arranged in the second recess 101c. Wherein, the fixed beam 105 is attached to the part of the wall of the box body 101 other than the second recess 101c; alternatively, the fixed beam 105 is spaced from the part of the wall of the box body 101 other than the second recess 101c.

[0228] In the above technical solution, by arranging the fixed beam 105 to be attached to the part of the wall of the box body 101 other than the second recess 101c, for the above-mentioned wall of the fixed beam 105 and the box body 101, at the position where the first heat exchanger 102 passes through, the fixed beam 105 is spaced from the wall of the box body 101, that is, the fixed beam 105 is spaced from the second recess 101c, so as to achieve heat insulation between the fixed beam 105 and the first heat exchanger 102 while avoiding the first heat exchanger 102. At the position where the first heat exchanger 102 is not passed through, the fixed beam 105 is attached to the wall of the box body 101, that is, the fixed beam 105 is in zero contact with the wall of the box body 101, which is convenient for increasing the fitting area between the fixed beam 105 and the box body 101 and is beneficial to improving the installation reliability of the fixed beam 105; by arranging the fixed beam 105 to be spaced from the part of the wall of the box body 101 other than the second recess 101c, it is beneficial to further increase the interval between the entire fixed beam 105 and the first heat exchanger 102, which is convenient for increasing the thermal resistance between the entire fixed beam 105 and the first heat exchanger 102, reducing the heat or cold transferred from the first heat exchanger 102 to the fixed beam 105, and is convenient for improving the energy utilization rate of the first heat exchanger 102.

[0229] Please refer to Figures 17 - 19 , in some embodiments, the battery 200 further includes a heat insulation member 107. The heat insulation member 107 includes a first heat insulation portion 1071, and the first heat insulation portion 1071 is arranged between the wall surface of the fixed beam 105 corresponding to the avoidance space 200a and the connecting portion 1e to fill at least part of the gap between the wall surface of the fixed beam 105 corresponding to the avoidance space 200a and the connecting portion 1e.

[0230] In the above technical solution, by arranging the first heat insulation portion 1071 between the wall surface of the expansion beam corresponding to the avoidance channel and the first heat exchanger 102, the first heat insulation portion 1071 corresponds to the second recess 101c, so as to further increase the thermal resistance between the fixed beam 105 and the first heat exchanger 102 through the heat insulation member 107.

[0231] Please refer to Figure 17 and Figure 19, in some embodiments, the heat insulation member 107 further includes a second heat insulation portion 1072, and the second heat insulation portion 1072 is disposed between the portion of the wall of the box body 101 other than the second recess 101c and the fixed beam 105.

[0232] It can be understood that the second recess 101c can be used to accommodate the connection portion 1e of the first heat exchange member 102. Exemplarily, a plurality of second recesses 101c are formed at intervals at the position of the box body 101 corresponding to the avoidance space 200a, and each second recess 101c accommodates one end of the heat exchange tube 1. The first heat insulation portions 1071 and the second heat insulation portions 1072 are respectively multiple, and the multiple first heat insulation portions 1071 and the multiple second heat insulation portions 1072 are alternately arranged one by one along the length direction of the fixed beam 105.

[0233] In the above solution, by arranging the second heat insulation portion 1072 between the portion of the wall of the box body 101 other than the second recess 101c and the fixed beam 105, it is convenient to sandwich the heat insulation member 107 between the box body 101 and the fixed beam 105, and it is convenient to realize the reliable installation of the heat insulation member 107 through the fixation of the fixed beam 105 and the box body 101. Thus, the heat insulation member 107 is convenient to provide a relatively flat mating surface for the connection between the box body 101 and the fixed beam 105, and at the same time, it is beneficial to reduce the depth of the second recess 101c and improve the forming convenience of the second recess 101c.

[0234] Please refer to Figure 19 , in some embodiments, a first fixing member 1081 is further provided on the fixed beam 105, and at least a part of the first fixing member 1081 is located inside the fixed beam 105; the battery 200 further includes a second fixing member 1082, and the second fixing member 1082 passes through the box body 101, the second heat insulation portion 1072 and the fixed beam 105, and the second fixing member 1082 is connected to the first fixing member 1081.

[0235] In the above technical solution, by arranging at least a part of the first fixing member 1081 inside the fixed beam 105, and making the second fixing member 1082 pass through the box body 101, the second heat insulation portion 1072 and the fixed beam 105 and be connected to the first fixing member 1081, the fixation of the box body 101, the heat insulation member 107 and the fixed beam 105 is realized through a simple fixing method, and at the same time, the reliable installation of the heat insulation member 107 is realized; at the same time, the second fixing member 1082 can be installed along the direction from the heat insulation member 107 towards the fixed beam 105, which is convenient to provide enough operating space during the assembly process of the second fixing member 1082 and improve the assembly convenience. In addition, the second fixing member 1082 passes through the second heat insulation portion 1072, which is convenient to make the second fixing member 1082 spaced apart from the first heat exchange member 102, so that the arrangement of the second fixing member 1082 does not affect the first heat exchange member 102.

[0236] Exemplarily, the first fixing member 1081 is a rivet nut, and the second fixing member 1082 is a threaded fastener such as a bolt. The box body 101 is formed with a first mounting hole, the second heat insulation portion 1072 is formed with a second mounting hole, and the fixing beam 105 is formed with a third mounting hole. The head of the first fixing member 1081 is fitted into the second mounting hole, and the first fixing member 1081 passes through the third mounting hole such that a part of the first fixing member 1081 extends into the fixing beam 105. The second fixing member 1082 passes through the first mounting hole and is threadedly engaged with the part of the first fixing member 1081 even inside the fixing beam 105, so that the above-mentioned part of the first fixing member 1081 is deformed to be riveted on the fixing beam 105. At the same time, the first fixing member 1081 and the second fixing member 1082 are threadedly connected. It can be understood that the above arrangement can achieve the sealing of the opening position of the box body 101 through corresponding sealing means, including but not limited to providing a gasket 1083 between the head of the second fixing member 1082 and the box body 101.

[0237] It can be understood that the above embodiments of the heat insulation arrangement of the first expansion beam B1 in this application are all applicable to other expansion beams of the battery 200. For example, the battery 200 further includes a second expansion beam B2, and the second expansion beam B2 is disposed in the first cavity 101a. All the battery cells 100 are clamped between the first expansion beam B1 and the second expansion beam B2. In the direction of the first cavity 101a facing the second cavity 101b, the first heat exchange member 102 is spaced apart from the second expansion beam B2 to achieve the heat insulation arrangement between the first heat exchange member 102 and the second expansion beam B2, that is, the entire first heat exchange member 102 is spaced apart and disposed on the side of the second expansion beam B2 facing the second cavity 101b. Another example is that the battery 200 further includes a second expansion beam B2 and a third expansion beam B3. The second expansion beam B2 and the third expansion beam B3 are both disposed in the first cavity 101a, and the third expansion beam B3 is located between the first expansion beam B1 and the second expansion beam B2. There are battery cells 100 between the first expansion beam B1 and the third expansion beam B3, and there are also battery cells 100 between the second expansion beam B2 and the third expansion beam B3. Then, a part of the first heat exchange member 102 is disposed on each of the opposite sides of the third expansion beam B3. At this time, an avoidance channel may be formed between the third expansion beam B3 and the box body 101, and the avoidance channel communicates with the above-mentioned opposite sides of the third expansion beam B3. For example, the box body 101 is formed with a third recess 101d and / or the third expansion beam B3 is formed with a fourth recess. The third recess 101d and / or the fourth recess constructs the avoidance channel. The first heat exchange member 102 passes through the avoidance channel, and the part of the first heat exchange member 102 passing through the avoidance channel is spaced apart from the third expansion beam B3 to achieve the heat insulation arrangement between the first heat exchange member 102 and the third expansion beam B3.

[0238] Optionally, the heat insulation method between the first heat exchanger 102 and the third expansion beam B3 is the same as or different from the heat insulation method between the first heat exchanger 102 and the fixed beam 105. Exemplarily, a third recess 101d is formed in the wall of the box body 101, and the third recess 101d constructs at least part of the avoidance channel, and the part of the first heat exchanger 102 passing through the avoidance channel is arranged in the third recess 101d. Wherein, the third expansion beam B3 is attached to the part of the wall of the box body 101 other than the third recess 101d; or, the third expansion beam B3 is spaced apart from the part of the wall of the box body 101 other than the third recess 101d.

[0239] Please refer to Figure 19 , in some embodiments, the first heat exchanger 102 includes at least one heat exchange tube 1, a heat exchange flow channel 10 is defined in the heat exchange tube 1, the heat exchange tube 1 is a flat tube or a corrugated tube, and at this time, in the cross-section of the heat exchange tube 1, the thickness of the heat exchange tube 1 is less than the width of the heat exchange tube 1, and the cross-section of the heat exchange tube 1 is perpendicular to the central axis of the heat exchange tube 1.

[0240] In the above technical solution, by setting the heat exchange tube 1 as a flat tube or a corrugated tube, it is beneficial to save the occupied space of the heat exchange tube 1, and at the same time, it is convenient to utilize the heat exchange on one side of the thickness of the heat exchange tube 1 with the battery cell 100 to achieve the balance between the volumetric energy density and thermal management of the battery 200. For example, the heat exchange tube 1 can be extruded, and the thickness of the heat exchange tube 1 can be as small as about 0.7 mm. In the related art, a water-cooled plate structure is adopted. The water-cooled plate usually includes two stacked plate bodies, and the two plate bodies are welded and fixed to define a flow channel. Therefore, the thickness of the water-cooled plate is usually thick, reaching more than 2.4 mm. It can be seen that the above setting of the present application can reduce the cost of the first heat exchanger 102, and at the same time save the occupied space of the first heat exchanger 102, and is convenient to also consider the improvement of the energy density of the battery 200 when the first heat exchanger 102 is arranged in the box body 101.

[0241] In the embodiment of the present application, the corrugated tube can be understood as adding at least one partition structure inside the flat tube to divide the internal space of the flat tube into multiple flow channels, and both ends of each flow channel are respectively communicated with the liquid inlet end and the liquid outlet end of the heat exchange tube 1. Among them, the multiple flow channels can be arranged at intervals along the width direction of the flat tube; or, the multiple flow channels can be arranged in multiple rows and multiple columns along the width direction and the thickness direction of the flat tube.

[0242] It can be understood that when the heat exchange tube 1 is a flat tube or a corrugated tube, if the heat exchange tube 1 passes through the avoidance space 200a between the fixed beam 105 and the box body 101, the above structure of the heat exchange tube 1 is beneficial to reducing the height of the avoidance space 200a in the thickness direction of the heat exchange tube 1, reducing the forming difficulty of the avoidance space 200a, and / or reducing the weakening of the corresponding structure.

[0243] Of course, in other embodiments, the heat exchange tube 1 can also be a tube of other shapes such as a circular tube.

[0244] In some embodiments, the first heat exchanger 102 includes a plurality of heat exchange tubes 1. The plurality of heat exchange tubes 1 are arranged at intervals in a first direction, or the plurality of heat exchange tubes 1 are wound around each other, and the plurality of heat exchange tubes 1 can be arranged in parallel.

[0245] Please refer to Figure 23 、 Figure 25 and Figure 27 , in some embodiments, the first heat exchanger 102 includes at least one heat exchange tube 1. The heat exchange tube 1 defines a heat exchange flow path 10. Two ports of the heat exchange flow path 10 are respectively located at two ends of the length of the heat exchange tube 1. At least one heat exchange tube 1 is configured as a first heat exchange tube 1a, that is, at least one of all the heat exchange tubes 1 of the first heat exchanger 102 is configured as the first heat exchange tube 1a. Wherein, the first heat exchange tube 1a includes a first heat exchange section 121 and a second heat exchange section 122. The second heat exchange section 122 is bent to form a U-shaped region 120. The first heat exchange section 121 is bent and arranged in the U-shaped region 120, and the first heat exchange section 121 is bent and connected to the second heat exchange section 122. The first heat exchange section 121 and the second heat exchange section 122 of the first heat exchange tube 1a can participate in defining a heat exchange part 1d.

[0246] Specifically, the battery 200 can include a plurality of battery cells 100. The first heat exchange tube 1a is used for heat exchange with the plurality of battery cells 100 of the battery 200, so that the temperature of the battery 200 can be limited within a reliable operating temperature, and reliable operation of the battery 200 is achieved.

[0247] Wherein, the above "the second heat exchange section 122 is bent to form a U-shaped region 120, and the first heat exchange section 121 is bent and arranged in the U-shaped region 120" is intended to illustrate that the second heat exchange section 122 is arranged on the outer periphery of the first heat exchange section 121, and can be arranged on at least three sides of the circumference of the first heat exchange section 121. The second heat exchange section 122 can be arranged closer to the peripheral position of the battery 200 relative to the first heat exchange section 121.

[0248] The second heat exchange section 122 is bent to form a U-shaped region 120, that is, in the direction from one end of the second heat exchange section 122 to the other end, at least a part of the second heat exchange section 122 extends along a U-shaped line to form a U-shaped region 120 in a U-shaped shape.

[0249] The first heat exchange section 121 is bent and arranged in the U-shaped region 120, that is, the first heat exchange section 121 is arranged in the space enclosed by the second heat exchange section 122, and the first heat exchange section 121 extends non-linearly inside the second heat exchange section 122 and has at least one bending position.

[0250] It should be noted that in this embodiment, only the first heat exchange section 121 is defined to be bent and arranged within the U-shaped region 120, and the bending form of the first heat exchange section 121 is not limited. That is, the specific bending form of the first heat exchange section 121 can be designed according to the heat exchange requirements of the battery 200. For example, the first heat exchange section 121 can extend along the length direction of the battery cell 100 (i.e., the first direction X1 in Figure 3 ), and after extending to a certain length, it bends towards the width direction of the battery cell 100 (i.e., the second direction X2 in Figure 3 ), and then continues to extend along the length direction of the battery cell 200 and bend along the width direction. Or, the first heat exchange section 121 can extend along the width direction of the battery cell 100, and after extending to a certain length, it bends towards the length direction of the battery cell 100, and then continues to extend along the width direction of the battery cell 100 and bend along the length direction.

[0251] The first heat exchange section 121 and the second heat exchange section 122 are bent and connected. That is to say, one end of the first heat exchange section 121 is connected to one end of the second heat exchange section 122, and the connection position of the first heat exchange section 121 and the second heat exchange section 122 is a non-linear structure of a bend. For example, the connection position of the first heat exchange section 121 and the second heat exchange section 122 can be bent into an arc section.

[0252] Exemplarily, one end of the first heat exchange section 121 away from the second heat exchange section 122 can form a port of the heat exchange flow channel 10, and the other end of the second heat exchange section 122 away from the first heat exchange section 121 forms another port of the heat exchange flow channel 10. Thus, when the first heat exchange tube 1a exchanges heat, the heat exchange medium can flow from the first heat exchange section 121 to the second heat exchange section 122, or can flow from the second heat exchange section 122 to the first heat exchange section 121.

[0253] It can be understood that during the process of the heat exchange medium flowing in the first heat exchange tube 1a, the temperature of the heat exchange medium gradually changes, resulting in a gradual decrease in the heat exchange effect. For example, when the first heat exchange tube 1a cools and dissipates heat from the battery cell 100, the heat of the battery cell 100 is gradually transferred to the heat exchange medium, causing the temperature of the heat exchange medium to gradually increase during the process of flowing along the first heat exchange tube 1a, the temperature difference with the battery cell 100 gradually becomes smaller, and the heat exchange efficiency gradually decreases; when the first heat exchange tube 1a heats up the battery cell 100, the heat in the heat exchange medium is gradually transferred to the battery cell 100, causing the temperature of the heat exchange medium to gradually decrease during the process of flowing along the first heat exchange tube 1a, the temperature difference with the battery cell 100 gradually becomes smaller, and the heat exchange efficiency gradually decreases.

[0254] In this embodiment, when the first heat exchange tube 1a cools multiple battery cells 100, the heat exchange medium can also flow from the first heat exchange section 121 to the second heat exchange section 122, but the heat exchange medium can also flow from the second heat exchange section 122 to the first heat exchange section 121. When the heat exchange medium also flows from the first heat exchange section 121 to the second heat exchange section 122, the battery cells 100 at the middle position (i.e., the battery cells 100 inside the inner periphery) can be cooled first, and then the battery cells 100 at the peripheral position can be cooled. Since the heat dissipation of the battery cells 100 at the peripheral position is better than that of the battery cells 100 inside, the heat exchange medium with a lower temperature in the first heat exchange section 121 can better meet the heat dissipation requirements of the battery cells 100 at the middle position. At the same time, since the battery cells 100 at the peripheral position can directly dissipate heat to the external environment naturally, when the temperature of the heat exchange medium in the second heat exchange section 122 is slightly higher, it can still meet the heat dissipation requirements of the peripheral battery cells 100, so that the cooling effects obtained by the battery cells 100 at the peripheral position and the battery cells 100 at the middle position are generally the same, and further, the temperatures of the battery cells 100 at the peripheral position and the battery cells 100 at the middle position are relatively consistent after cooling and heat dissipation, making the temperature distribution in the battery 200 more uniform.

[0255] When the first heat exchange tube 1a heats up multiple battery cells 100, the heat exchange medium can also flow from the first heat exchange section 121 to the second heat exchange section 122, but the heat exchange medium can also flow from the second heat exchange section 122 to the first heat exchange section 121. Exemplarily, when the heat exchange medium flows from the second heat exchange section 122 to the first heat exchange section 121, the battery cells 100 at the periphery can be heated first, and then the heat exchange medium can cool the battery cells 100 at the middle position. Since the battery cells 100 at the periphery of the battery 200 dissipate more heat to the external environment, the temperature of the battery cells 100 at the periphery of the battery 200 is more likely to drop. The heat exchange medium first heats the battery cells 100 at the periphery of the battery 200. The heat exchange medium with a higher temperature can, while increasing the temperature of the battery cells 100 at the periphery, make up for the heat lost by the battery cells 100 due to heat dissipation to the external environment and meet their heating needs. The battery cells 100 at the middle position have a small contact area with the external environment and less heat loss. The heat exchange medium with a lower temperature flowing in the first heat exchange section 121 can cooperate with the heat generated by the battery cells 100 themselves to well meet their heating needs. Thus, the heating effects obtained by the battery cells 100 at the periphery and the battery cells 100 at the middle position of the battery assembly can be basically the same, and further, the temperatures of the battery cells 100 at the periphery and the battery cells 100 at the middle position are relatively consistent after heating and temperature rise, making the temperature distribution in the battery 200 more uniform.

[0256] In the above-described embodiment, by bending the second heat exchange section 122 to form a U-shaped region 120, and bending the first heat exchange section 121 to be disposed within the U-shaped region 120, when the first heat exchange tube 1a exchanges heat with a plurality of battery cells 100, the U-shaped region 120 formed by the second heat exchange section 122 on the periphery can be opposed to the peripheral battery cells 100, and the first heat exchange section 121 within the U-shaped region 120 can be opposed to the internal battery cells 100, so that the first heat exchange tube 1a can compensate for the internal and external temperature difference caused by the heat exchange between the peripheral battery cells 100 and the environment, making the heat exchange effect between the peripheral battery cells 100 and the internal battery cells 100 tend to be consistent, improving the temperature uniformity of the battery 200, and thereby increasing the service life of the battery 200 to a certain extent.

[0257] Optionally, the second heat exchange section 122 can be located at the outermost side in the circumferential direction of the first heat exchange tube 1a. That is to say, the second heat exchange section 122 is formed as the outermost flow channel of the first heat exchange tube 1a. In this way, the second heat exchange section 122 can be used to exchange heat with the battery cells 100 along the periphery, which is beneficial to improving the temperature difference between the peripheral battery cells 100 and the internal battery cells 100 caused by heat exchange with the environment, thereby enhancing the temperature uniformity of the battery cells 100 on the outer periphery of the battery 200.

[0258] Optionally, the first heat exchange section 121 and the second heat exchange section 122 are bent in the same plane, which can enable the first heat exchange tube 1a to exchange heat with a plurality of battery cells 100 in the same plane. Thus, the structure of the first heat exchange tube 1a can be simplified, the production difficulty of the first heat exchange tube 1a can be reduced, and at the same time, the occupied space of the first heat exchange tube 1a can be reduced, improving the volume energy density of the battery 200.

[0259] Optionally, as Figure 24 shown, a plurality of heat exchange tubes 1 are arranged at intervals along the first direction. The two heat exchange tubes 1 at both ends in the first direction are both the first heat exchange flow channels 10 of the first heat exchange tube 1; and the two first heat exchange flow channels 10 are symmetrically arranged with respect to the center line L extending in the second direction of the first heat exchange member 102. It can be understood that arranging the second heat exchange section 122 of the first heat exchange tube 1a at the peripheral position can improve the temperature uniformity inside and outside the battery module. Therefore, forming the two heat exchange tubes 1 at both ends in the first direction as the first heat exchange tube 1a can make the temperature equalizing performance of the battery cells 100 at both ends in the first direction of the battery module better, realizing the temperature equalization of the entire battery module. Thus, by providing two symmetrically arranged first heat exchange tubes 1, liquid can be fed simultaneously on both sides, increasing the liquid feeding flow rate, shortening the length of a single heat exchange flow channel, reducing the pressure drop within a single heat exchange flow channel, and thereby improving the heat exchange efficiency.

[0260] Furthermore, the medium flow directions of the two heat exchange tubes 1 at both ends in the first direction and the inlets and outlets at both ends are symmetrically arranged. In this way, the two first heat exchange tubes 1a can synchronously heat exchange the two ends of the battery module in the first direction, and the temperature equalization effect is better.

[0261] Of course, in other embodiments, the plurality of heat exchange tubes 1 may be asymmetric with respect to the center line of the first heat exchange member 102 in the second direction.

[0262] Please refer to Figure 23 , in some embodiments, the first heat exchange section 121 may include a first heat exchange part 1211 and a first bending part 1212. The plurality of first heat exchange parts 1211 are arranged at intervals in the first direction, each first heat exchange part 1211 extends in the second direction, and the first bending part 1212 is bent and connected between two adjacent first heat exchange parts 1211 so that the plurality of first heat exchange parts 1211 are sequentially connected, and the second direction is arranged at an angle with the first direction.

[0263] It should be noted that the shape of the first heat exchange part 1211 can be various. For example, the first heat exchange part 1211 can be linear or curved, etc. In this way, the plurality of first heat exchange parts 1211 are sequentially bent and connected, so that the first heat exchange section 121 can form heat exchange channels in the forms of S-shaped, U-shaped, V-shaped, etc. The shape of the first bending part 1212 can be arc-shaped or zigzag-shaped, etc. "The first direction and the second direction are arranged at an angle" is intended to illustrate that the first direction and the second direction can be vertically arranged or only intersecting and non-vertical arranged. For example, the first direction and the second direction can be arranged at angles of 30°, 60°, 80°, 120°, 150° or 170°. For example Figure 3 As shown, the first direction is the length direction of the battery cell 100, and the second direction is the thickness direction of the battery cell 100. In this way, the plurality of first heat exchange parts 1211 are bent and connected to form an S-shaped heat exchange channel, and heat exchange can be realized for the plurality of battery cells 100.

[0264] In the above embodiment, on the one hand, by providing a plurality of first heat exchange parts 1211, the heat exchange area of the first heat exchange section 121 can be increased, and further the heat exchange area of the first heat exchange tube 1a can be increased, so that the heat exchange effect of the first heat exchange tube 1a can be improved; on the other hand, since the internal battery cells 100 are wrapped by the external battery cells 100 and the temperature difference between the internal battery cells 100 is not large, therefore, by providing a plurality of first heat exchange parts 1211, the overall heat exchange effect can be ensured on the premise of ensuring a small temperature difference between the internal and external battery cells 100.

[0265] It can be understood that the first bending portion 1212 is arc-shaped, and there is a certain included angle between the fluid flow directions at both ends of the first bending portion 1212. Thus, the first bending portion 1212 can change the fluid flow direction, and further enable the two connected first heat exchange portions 1211 to be arranged in an extended manner within a preset area, thereby increasing the heat exchange area of the first heat exchange section 121 and improving the heat exchange efficiency of the first heat exchange section 121. At the same time, the first bending portion 1212 is arc-shaped, and the arc shape can reduce the fluid flow resistance and pressure drop, thereby increasing the fluid flow rate and further increasing the heat exchange efficiency of the first heat exchange section 121. Moreover, it can also make the structure of the first heat exchange tube 1a more compact, occupy a smaller space size, and facilitate the miniaturized design of the battery 200.

[0266] Exemplarily, the first bending portion 1212 is semi-circular arc-shaped to connect two first heat exchange portions 1211 that are parallel and spaced apart from each other, which is beneficial to increasing the design diversity of the heat exchange flow path 10, improving the adaptability of the first heat exchange tube 1a to multiple battery monomers 100, and having a simple structure and being easy to produce. Of course, the bending angle of the first bending portion 1212 can also be adjusted according to requirements, for example, it can be 150° or 135°.

[0267] In addition, the number of the first bending portions 1212 can be one, two, three or more than three. The first bending portions 1212 can make the first heat exchange tube 1a arranged in a circuitous manner, which is convenient for increasing the heat exchange area of the first heat exchange tube 1a and improving the heat exchange efficiency.

[0268] Please refer to Figure 23 , in some embodiments, the second heat exchange section 122 includes a second heat exchange portion 1221, a third heat exchange portion 1222, and a fourth heat exchange portion 1223. The second heat exchange portion 1221 extends along the first side perimeter of the first heat exchange section 121. The third heat exchange portion 1222 is connected between the second heat exchange portion 1221 and the first heat exchange section 121 and extends along the second side perimeter of the first heat exchange section 121. The first end of the third heat exchange portion 1222 is connected to the second heat exchange portion 1221 at an included angle, and the second end of the third heat exchange portion 1222 is connected to the first heat exchange section 121 at an included angle. The fourth heat exchange portion 1223 is communicated with the second heat exchange portion 1221, is connected to the second heat exchange portion 1221 at an included angle, and extends along the third side perimeter of the first heat exchange section 121.

[0269] It can be understood that the fourth heat exchange portion 1223 is connected to the end of the second heat exchange portion 1221 far from the third heat exchange portion 1222. The fourth heat exchange portion 1223, the second heat exchange portion 1221, and the third heat exchange portion 1222 are connected in sequence to form a U-shaped region 120. The first heat exchange section 121 is arranged in the U-shaped region 120 and is connected to the end of the third heat exchange portion 1222 far from the second heat exchange portion 1221.

[0270] The first end of the third heat exchange part 1222 is connected to the second heat exchange part 1221 at an angle, that is, the third heat exchange part 1222 is connected to the second heat exchange part 1221, and the third heat exchange part 1222 and the second heat exchange part 1221 are not collinear and not parallel, but are arranged at an angle greater than 0° and less than 180°. For example, the third heat exchange part 1222 is connected to the second heat exchange part 1221 and the included angle is 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0271] The second end of the third heat exchange part 1222 is connected to the first heat exchange section 121 at an angle; that is, the second end of the third heat exchange part 1222 is connected to the second heat exchange part 1221, and the second end of the third heat exchange part 1222 and the first heat exchange section 121 are arranged at an angle greater than 0° and less than 180°. For example, the second end of the third heat exchange part 1222 is connected to the first heat exchange section 121 and the included angle is 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0272] The fourth heat exchange part 1223 is communicated with the second heat exchange part 1221 and is connected to the second heat exchange part 1221 at an angle, that is, the fourth heat exchange part 1223 is connected to the second heat exchange part 1221 and is arranged at an angle greater than 0° and less than 180°. For example, the fourth heat exchange part 1223 is connected to the second heat exchange part 1221 and the included angle is 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0273] It should be noted that in this embodiment, it is defined that the second heat exchange section 122 is arranged on three sides in the circumferential direction of the first heat exchange section 121, and the specific positions of the second heat exchange part 1221, the third heat exchange part 1222, and the fourth heat exchange part 1223 relative to the first heat exchange section 121 are not defined. Thus, the specific positions of the second heat exchange part 1221, the third heat exchange part 1222, and the fourth heat exchange part 1223 can be designed according to actual situations. For example, if the second heat exchange part 1221 can be arranged on one side in the first direction of the first heat exchange section 121, then the third heat exchange part 1222 and the fourth heat exchange part 1223 are respectively arranged on both sides in the second direction of the first heat exchange section 121; if the second heat exchange part 1221 is arranged on one side in the second direction of the first heat exchange section 121, then the third heat exchange part 1222 and the fourth heat exchange part 1223 are respectively arranged on both sides in the first direction of the first heat exchange section 121.

[0274] In the above-described embodiment, by arranging the second heat exchange part 1221, the third heat exchange part 1222, and the fourth heat exchange part 1223 on three sides of the first heat exchange section 121 respectively, the second heat exchange section 122 can surround the first heat exchange section 121, thereby increasing the layout compactness of the first heat exchange tube 1a, realizing the miniaturization of the structure of the first heat exchange tube 1a, and further facilitating the improvement of the volumetric energy density of the battery 200. At the same time, the structure of the first heat exchange tube 1a can be simplified, which is convenient for the processing and production of the first heat exchange member 102.

[0275] Please refer to Figure 23 , in some embodiments, the first heat exchange section 121 may include a plurality of first heat exchange parts 1211, and the plurality of first heat exchange parts 1211 are sequentially bent and connected in the first direction. Among them, the second heat exchange part 1221 is located on one side of the plurality of first heat exchange parts 1211 along the first direction, the third heat exchange part 1222 is located on one side of the plurality of first heat exchange parts 1211 along the second direction, and the first direction and the second direction are arranged at an angle; the first end of the third heat exchange part 1222 is connected to one end of the second heat exchange part 1221 along the second direction, the second end of the third heat exchange part 1222 is connected to the one that is the farthest from the second heat exchange part 1221 among the plurality of first heat exchange parts 1211 in the first direction, the fourth heat exchange part 1223 is located on the other side of the plurality of first heat exchange parts 1211 along the second direction, one end of the fourth heat exchange part 1223 is connected to the end of the second heat exchange part 1221 that is far from the third heat exchange part 1222, and the other end of the fourth heat exchange part 1223 extends in the first direction away from the second heat exchange part 1221.

[0276] The plurality of first heat exchange parts 1211 are sequentially bent and connected in the first direction, that is to say, the plurality of first heat exchange parts 1211 are sequentially arranged in the first direction, and in the first direction, two adjacent and connected first heat exchange parts 1211 are bent and connected. Among them, the first heat exchange part 1211 may extend along a straight line parallel to the second direction, the first heat exchange part 1211 may also extend along a straight line arranged at an angle to the second direction, and the first heat exchange part 1211 may also extend along a curve and / or a broken line in the second direction.

[0277] It can be understood that the fourth heat exchange part 1223, the second heat exchange part 1221, the third heat exchange part 1222 and a first heat exchange part 1211 which is the farthest from the second heat exchange part 1221 are connected in sequence. A plurality of first heat exchange parts 1211 are arranged at intervals in the first direction and are connected by bending in sequence. In this way, the heat exchange medium can flow through the fourth heat exchange part 1223, the second heat exchange part 1221 and the third heat exchange part 1222 in sequence, and then enter the first heat exchange section 121. In the first heat exchange section 121, the medium first passes through a first heat exchange part 1211 which is the farthest from the second heat exchange part 1221, and finally flows to a first heat exchange part 1211 which is the closest to the second heat exchange part 1221; or, the heat exchange medium can first flow into the first heat exchange section 121. In the first heat exchange section 121, the fluid first flows through a first heat exchange part 1211 which is the closest to the second heat exchange part 1221, flows out from a first heat exchange part 1211 which is the farthest from the second heat exchange part 1221 and then flows to the third heat exchange part 1222, and then sequentially flows through the second heat exchange part 1221 and the fourth heat exchange part 1223 through the third heat exchange part 1222.

[0278] Taking Figure 23 the first heat exchange tube 1a arranged far from the origin of coordinates in the first direction as an example, the first heat exchange part 1211 extends linearly in the second direction. A plurality of first heat exchange parts 1211 are arranged at intervals in the first direction. The second heat exchange part 1221 is arranged on one side of the plurality of first heat exchange parts 1211 far from the origin of coordinates in the first direction and extends linearly in the second direction, and is used for heat exchange with the edges of the plurality of battery monomers 100 on the side far from the origin of coordinates in the first direction. The third heat exchange part 1222 is arranged on one side of the plurality of first heat exchange parts 1211 close to the origin of coordinates in the second direction and extends linearly in the first direction. The third heat exchange part 1222 is used for heat exchange with the edges of the plurality of battery monomers 100 on the side close to the origin of coordinates in the second direction. The fourth heat exchange part 1223 is arranged on one side of the plurality of first heat exchange parts 1211 far from the origin of coordinates in the second direction and extends linearly in the first direction. The fourth heat exchange part 1223 can be used for heat exchange with the edges of the plurality of battery monomers 100 on the side far from the origin of coordinates in the second direction.

[0279] In the above embodiment, by arranging a plurality of first heat exchange parts 1211 to be connected by bending in sequence in the first direction, the second heat exchange part 1221 is located on one side of the plurality of first heat exchange parts 1211 in the first direction, the third heat exchange part 1222 is located on one side of the plurality of first heat exchange parts 1211 in the second direction, and the fourth heat exchange part 1223 is located on the other side of the plurality of first heat exchange parts 1211 in the second direction, the positional relationship between the second heat exchange part 1221, the third heat exchange part 1222, the fourth heat exchange part 1223 and the first heat exchange part 1211 is defined, further defining the layout of the first heat exchange tube 1a, simplifying the structure of the first heat exchange tube 1a and facilitating processing and manufacturing.

[0280] Exemplarily, the third heat exchange part 1222 and the fourth heat exchange part 1223 are arranged to extend along the first direction, and the first heat exchange part 1211 and the second heat exchange part 1221 are both arranged to extend along the second direction, which can facilitate the meandering arrangement of the first heat exchange tube 1a, and further reduce the production difficulty of the first heat exchange tube 1a and the production cost of the first heat exchange member 102. Further, the third heat exchange part 1222 and the fourth heat exchange part 1223 can both extend linearly along the first direction, and the first heat exchange part 1211 and the second heat exchange part 1221 can both extend linearly along the second direction. Among them, the linear structure is simple, the production is convenient, and the arrangement is easy. Therefore, the production complexity and production cost of the first heat exchange flow channel 10 can be further reduced.

[0281] Optionally, as Figure 23 shown, the third heat exchange part 1222 and the fourth heat exchange part 1223 are both arranged to extend along the first direction. In the first direction, the length b1 of the fourth heat exchange part 1223 is less than or equal to the length a1 of the third heat exchange part 1222. Among them, when the length b1 of the fourth heat exchange part 1223 is equal to the length a1 of the third heat exchange part 1222, the fourth heat exchange part 1223, the second heat exchange part 1221 and the third heat exchange part 1222 are connected in sequence to form a standard U-shaped flow channel, and the sizes of both ends of the U-shaped region 120 are close, which is beneficial to controlling the temperature difference between the battery monomers 100 at both ends in the second direction and improving the temperature uniformity; when the length b1 of the fourth heat exchange part 1223 is less than the length a1 of the third heat exchange part 1222, it can be beneficial to avoid other flow channel segments of the first heat exchange tube 1a, other heat exchange flow channels or other components, and further beneficial to the layout of the first heat exchange tube 1a and the compact structure.

[0282] Please refer to Figure 23 , in some embodiments, the fourth heat exchange part 1223 extends along the first direction and extends to a position close to the one of the plurality of first heat exchange parts 1211 that is the farthest from the second heat exchange part 1221. Specifically, the fourth heat exchange part 1223 extends along the first direction, one end of the fourth heat exchange part 1223 is connected to the second heat exchange part 1221, and the other end of the fourth heat exchange part 1223 extends to a position close to the one of the plurality of first heat exchange parts 1211 that is the farthest from the second heat exchange part 1221. That is to say, the other end of the fourth heat exchange part 1223 extends to be flush with the first heat exchange part 1211 that is the farthest from the second heat exchange part 1221, or, the other end of the fourth heat exchange part 1223 extends to be close to the first heat exchange part 1211 that is the farthest from the second heat exchange part 1221, or, the other end of the fourth heat exchange part 1223 extends to exceed the first heat exchange part 1211 that is the farthest from the second heat exchange part 1221.

[0283] In this way, the length of the fourth heat exchange part 1223 can be increased, the heat exchange area of the fourth heat exchange part 1223 can be increased, the heat exchange effect of the first heat exchange member 102 can be further improved, and it is also beneficial to the layout of the first heat exchange tube 1a.

[0284] Please refer to Figure 25 , in some embodiments, the first heat exchange section 121 may include a plurality of first heat exchange parts 1211, and the plurality of first heat exchange parts 1211 are sequentially bent and connected in the first direction; wherein, the second heat exchange part 1221 is located on one side of the plurality of first heat exchange parts 1211 along the second direction, the third heat exchange part 1222 is located on one side of the plurality of first heat exchange parts 1211 along the first direction, and the first direction and the second direction are arranged at an angle; the first end of the third heat exchange part 1222 is connected to one end of the second heat exchange part 1221 along the first direction, the second end of the third heat exchange part 1222 is connected to the one closest to the third heat exchange part 1222 among the plurality of first heat exchange parts 1211 along the first direction, the fourth heat exchange part 1223 is located on the other side of the plurality of first heat exchange parts 1211 along the first direction, one end of the fourth heat exchange part 1223 is connected to the end of the second heat exchange part 1221 far from the third heat exchange part 1222, and the other end of the fourth heat exchange part 1223 extends in the direction away from the second heat exchange part 1221 along the second direction.

[0285] The plurality of first heat exchange parts 1211 are sequentially bent and connected in the first direction, that is to say, the plurality of first heat exchange parts 1211 are sequentially arranged in the first direction, and in the first direction, two adjacent and connected first heat exchange parts 1211 are bent and connected. Among them, the first heat exchange part 1211 may extend along a straight line parallel to the second direction, the first heat exchange part 1211 may also extend along a straight line arranged at an angle to the second direction, and the first heat exchange part 1211 may also extend along a curve and / or a broken line in the second direction.

[0286] It can be understood that the fourth heat exchange part 1223, the second heat exchange part 1221, the third heat exchange part 1222 and the first heat exchange part 1211 closest to the third heat exchange part 1222 are connected in sequence. The multiple first heat exchange parts 1211 are arranged at intervals along the first direction and are connected by bending in sequence. In this way, the heat exchange medium can flow through the fourth heat exchange part 1223, the second heat exchange part 1221 and the third heat exchange part 1222 in sequence, and then enter the first heat exchange section 121. In the first heat exchange section 121, the fluid first passes through the first heat exchange part 1211 closest to the third heat exchange part 1222, and finally flows to the first heat exchange part 1211 farthest from the third heat exchange part 1222; or, the heat exchange medium can first flow into the first heat exchange section 121. In the first heat exchange section 121, the medium first flows through the first heat exchange part 1211 farthest from the third heat exchange part 1222, flows out from the first heat exchange part 1211 closest to the third heat exchange part 1222 and then flows to the third heat exchange part 1222, and then passes through the third heat exchange part 1222 and flows through the second heat exchange part 1221 and the fourth heat exchange part 1223 in sequence.

[0287] In the above embodiment, by arranging the second heat exchange part 1221 on one side of the multiple first heat exchange parts 1211 along the second direction, the third heat exchange part 1222 on one side of the multiple first heat exchange parts 1211 along the first direction, and the fourth heat exchange part 1223 on the other side of the multiple first heat exchange parts 1211 along the first direction, another layout of the first heat exchange tube 1a is defined. Thus, the diversity of the first heat exchange tube 1a can be increased, so that it can meet the heat exchange requirements of different batteries 200, simplify the structure of the first heat exchange tube 1a, and facilitate processing and manufacturing.

[0288] Exemplarily, as Figure 25 shown, the first heat exchange part 1211, the third heat exchange part 1222 and the fourth heat exchange part 1223 extend along the second direction, and the second heat exchange part 1221 extends along the first direction. Further, the first heat exchange part 1211, the third heat exchange part 1222 and the fourth heat exchange part 1223 extend linearly along the second direction, and the second heat exchange part 1221 extends linearly along the first direction. Among them, the linear structure is simple, convenient for production, and easy to arrange. Thus, the production complexity and production cost of the first heat exchange flow channel 10 can be further reduced.

[0289] Exemplarily, the second heat exchange part 1221 and the third heat exchange part 1222 are connected by an arc-shaped bending part for transition, and the third heat exchange part 1222 and the first heat exchange part 1211 are connected by an arc-shaped bending part for transition, so that the flow direction of the heat exchange medium is changed, and the second heat exchange section 122 extends within a preset area and is used for heat exchange with the battery cell 100. At the same time, the arc-shaped bending part can reduce the flow resistance of the fluid and reduce the pressure drop. Therefore, the flow rate of the heat exchange medium can be increased, and the heat exchange efficiency can be further improved. Optionally, the arc-shaped bending parts between the second heat exchange part 1221 and the third heat exchange part 1222 and between the third heat exchange part 1222 and the first heat exchange part 1211 are respectively in a quarter-circular arc shape, which can change the flow direction of the fluid from the original flow direction to a direction perpendicular to the original flow direction after passing through the arc-shaped bending part; at the same time, the circular arc shape can also reduce the flow resistance of the fluid, enable the fluid to flow smoothly within the arc-shaped bending part, and effectively prevent the reduction of heat exchange efficiency caused by too slow medium flow.

[0290] Please refer to Figure 23 , in some embodiments, the second heat exchange section 122 further includes a fifth heat exchange part 1224. The fifth heat exchange part 1224 extends along the fourth side perimeter of the first heat exchange section 121, and the fifth heat exchange part 1224 closes at least part of the opening of the U-shaped area 120 formed by the second heat exchange part 121, the third heat exchange part 122, and the fourth heat exchange part 125. Then, one of the first heat exchange parts 1211 can extend along the fourth side perimeter of the first heat exchange section 121.

[0291] It can be understood that the fifth heat exchange part 1224 can close part of the opening of the U-shaped area 120 or completely close the opening of the U-shaped area 120. Thus, the second heat exchange section 122 can basically cover the perimeter position of the battery 200 and perform heat exchange with the perimeter. In this way, the second heat exchange section 122 can perform heat exchange on all or most of the perimeters of the battery assembly. Therefore, the structure of the first heat exchange tube 1a can be set according to the actual arrangement mode of multiple battery cells 100 or the heat exchange requirements, optimizing the heat exchange structure and improving the heat exchange efficiency.

[0292] In the above embodiment, by providing the fifth heat exchange part 1224, the second heat exchange section 122 can perform heat exchange on the four-side perimeters of the assembly composed of all battery cells 100. In this way, the second heat exchange section 12 of one first heat exchange tube 1a can perform heat exchange on the four-side perimeters of the assembly composed of multiple battery cells 100, which is beneficial to improving the heat exchange effect on the four-side perimeters of the battery 200 and enhancing the temperature uniformity of the battery 200.

[0293] Optionally, the fifth heat exchange part 1224 is disposed opposite to the first heat exchange part 1221, and the fifth heat exchange part 1224 extends along the second direction. The fifth heat exchange part 1224 is connected between the second end of the third heat exchange part 1222 and the first heat exchange section 111, and the fifth heat exchange part 1224 is connected to the third heat exchange part 1222 at an angle, and the fifth heat exchange part 1224 is connected to the first heat exchange section 111 at an angle.

[0294] It should be noted that in the embodiments of the present application, "the fifth heat exchange part 1224 is connected to the third heat exchange part 1222 at an angle" and "the fifth heat exchange part 1224 is connected to the first heat exchange section 111 at an angle" may mean that the corresponding two parts are connected and arranged at an angle greater than 0° and less than or equal to 180°; obviously, the angle between the third heat exchange part 1222 and the second heat exchange part 1221 is greater than 0° and less than 180°, and the angle between the fourth heat exchange part 1223 and the second heat exchange part 1221 is greater than 0° and less than 180°.

[0295] In some embodiments, the first heat exchange section 121 is connected downstream of the second heat exchange section 122 in the direction of the medium flow. That is to say, the heat exchange medium first flows through the second heat exchange section 122 and then flows into the first heat exchange section 121. Among them, the second heat exchange section 122 is wound around the circumference of the first heat exchange section 121. When the first heat exchange tube 1a exchanges heat with the battery cell 100, since the peripheral temperature of the component composed of all the battery cells 100 (hereinafter referred to as the battery pack) dissipates heat faster, especially in the low-temperature heating condition, the high-temperature heat exchange medium starts to exchange heat from the second heat exchange section 122, which can enable the first heat exchange tube 1a to preferentially exchange heat with the outer circumference of the battery pack, thereby facilitating the improvement of the temperature difference between the inside and outside of the above-mentioned battery pack and improving the service life of the battery 200 to a certain extent.

[0296] In some embodiments, the first heat exchange member 102 is configured such that: when heating the battery cell 100, the first connection section 121 is connected downstream of the second heat exchange section 122 in the direction of the medium flow; when cooling the battery cell 100, the first heat exchange section 121 is connected upstream of the second heat exchange section 122 in the direction of the medium flow.

[0297] Specifically, when heating the battery pack of the battery 200, the temperature of the heat exchange medium flowing in the first heat exchange member 102 is higher than the operating temperature of the battery 200. The first heat exchange member 102 heats up the battery pack. The high-temperature heat exchange medium first flows into the second heat exchange section 122 and then flows to the first heat exchange section 121. The temperature of the heat exchange medium flowing inside the second heat exchange section 122 is higher than the temperature of the heat exchange medium flowing inside the first heat exchange section 121.

[0298] Since the high-temperature medium first enters the second heat exchange section 122 located outside the first heat exchange tube 1a, the second heat exchange section 122 can first heat the battery cells 100 on the periphery of the battery module. After the heat exchange medium enters the first heat exchange section 121, it then cools the battery cells 100 at the middle position of the battery module. Since the battery cells 100 on the periphery of the battery module dissipate more heat to the external environment, the temperature of the battery cells 100 on the periphery of the battery module drops more. The heat exchange medium first heats the battery cells 100 on the periphery of the battery module. The higher-temperature heat exchange medium can, while raising the temperature of the battery cells 100 on the periphery, make up for the heat lost by the battery cells 100 due to heat dissipation to the external environment and meet their heating requirements. The battery cells 100 at the middle position of the battery module have less contact area with the external environment and less heat loss. The lower-temperature heat exchange medium flowing in the first heat exchange section 121 can cooperate with the heat generated by the battery cells 100 themselves to well meet their heating requirements. Thus, the battery cells 100 on the periphery of the battery module and the battery cells 100 at the middle position of the battery module can both obtain substantially the same heating effect, and further, the temperatures of the battery cells 100 on the periphery of the battery module and the battery cells 100 at the middle position of the battery module are relatively consistent after heating and temperature rise, making the temperature distribution in the battery 200 more uniform.

[0299] When cooling the battery module of the battery 200, the temperature of the heat exchange medium flowing in the first heat exchange member 102 is lower than the operating temperature of the battery 200. The first heat exchange member 102 is used to cool the battery 200. The heat exchange medium flows from the first heat exchange section 121 to the second heat exchange section 122, and the temperature of the heat exchange medium flowing in the first heat exchange section 121 is lower than the temperature of the heat exchange medium inside the second heat exchange section 122.

[0300] When cooling and reducing the temperature of the battery 200, the heat exchange medium flows from the first heat exchange section 121 to the second heat exchange section 122. That is to say, the heat exchange medium flows from the middle part of the battery module to the edge position of the battery module for heat exchange. Among them, since the heat dissipation of the battery cells 100 at the peripheral position of the battery 200 is better than that of the battery cells 100 inside, the lower-temperature heat exchange medium in the first heat exchange section 121 can better meet the heat dissipation requirements of the battery cells 100 at the middle position of the battery module. At the same time, since the battery cells 100 at the peripheral position of the battery module can directly dissipate heat to the external environment naturally, even when the temperature of the heat exchange medium in the second heat exchange section 122 is slightly higher, it can still meet the heat dissipation requirements of the peripheral battery cells 100. Thus, the battery cells 100 at the peripheral position of the battery module and the battery cells 100 at the middle position of the battery module can obtain substantially the same cooling effect, and further, the temperatures of the battery cells 100 at the peripheral position of the battery module and the battery cells 100 at the middle position of the battery module are relatively consistent after cooling and heat dissipation, reducing the temperature difference inside and outside the battery module and making the temperature distribution in the battery 200 more uniform.

[0301] Please refer to Figures 25 - 27 , in some embodiments, the first heat exchanger 102 further includes a second heat exchange tube 1b. The second heat exchange tube 1b and the first heat exchange tube 1a are arranged on the same side of the battery cell 100. At least a part of the second heat exchange tube 1b is bent and arranged in the U-shaped area 120 of the first heat exchange tube 1a, that is, a part of the second heat exchange tube 1b is bent and arranged in the U-shaped area 120 of the first heat exchange tube 1a, or the entire second heat exchange tube 1b is bent and arranged in the U-shaped area 120 of the first heat exchange tube 1a. The bending structure of the second heat exchange tube 1b is the same as or different from the bending structure of the first heat exchange tube 1a.

[0302] For example, when the bending structure of the second heat exchange tube 1b is the same as the bending structure of the first heat exchange tube 1a, the second heat exchange tube 1b may include a U-shaped area 120 with the same structure as the first heat exchange tube 1a. The second heat exchange tube 1b also includes a first heat exchange part, a second heat exchange part, a third heat exchange part, and a fourth heat exchange part. The fourth heat exchange part, the second heat exchange part, and the third heat exchange part of the second heat exchange tube 1b are bent and connected in sequence to form a U-shaped structure. The first heat exchange parts of the second heat exchange tube 1b are multiple and arranged in the U-shaped area 120 of the second heat exchange tube 1b. The multiple first heat exchange tubes are arranged at intervals and bent and connected in sequence; wherein, the first heat exchange part, the second heat exchange part, the third heat exchange part, and the fourth heat exchange part of the second heat exchange tube 1b are all arranged in the U-shaped area 120 of the first heat exchange tube 1a.

[0303] Of course, in other examples, the bending structure of the second heat exchange tube 1b may also be different from the bending structure of the first heat exchange tube 1a.

[0304] In the above technical solution, by setting the second heat exchange tube 1b, the diversity of the heat exchange flow path 10 of the first heat exchanger 102 can be increased, so that the arrangement of the heat exchange flow path 10 is more flexible, which is beneficial to further improving the heat exchange effect of the first heat exchanger 102 and improving the temperature uniformity of the battery 200.

[0305] Exemplarily, for the second heat exchange tube 1b: A plurality of first heat exchange portions 1211 are sequentially bent and connected in the first direction. The second heat exchange portion 1221 is located on one side of the plurality of first heat exchange portions 1211 in the second direction. The third heat exchange portion 1222 is located on one side of the plurality of first heat exchange portions 1211 in the first direction. The first direction and the second direction are arranged at an angle. The first end of the third heat exchange portion 1222 is connected to one end of the second heat exchange portion 1221 in the first direction. The second end of the third heat exchange portion 1222 is connected to the one of the plurality of first heat exchange portions 1211 that is closest to the third heat exchange portion 1222 in the first direction. The fourth heat exchange portion 1223 is located on the other side of the plurality of first heat exchange portions 1211 in the first direction. One end of the fourth heat exchange portion 1223 is connected to the end of the second heat exchange portion 1221 that is far from the third heat exchange portion 1222. The other end of the fourth heat exchange portion 1223 extends in the second direction away from the second heat exchange portion 1221.

[0306] Of course, in other examples, for the second heat exchange tube 1b: A plurality of first heat exchange portions 1211 are sequentially bent and connected in the first direction. The second heat exchange portion 1221 is located on one side of the plurality of first heat exchange portions 1211 in the first direction. The third heat exchange portion 1222 is located on one side of the plurality of first heat exchange portions 1211 in the second direction. The first direction and the second direction are arranged at an angle. The first end of the third heat exchange portion 1222 is connected to one end of the second heat exchange portion 1221 in the second direction. The second end of the third heat exchange portion 1222 is connected to the one of the plurality of first heat exchange portions 1211 that is farthest from the second heat exchange portion 1221 in the first direction. The fourth heat exchange portion 1223 is located on the other side of the plurality of first heat exchange portions 1211 in the second direction. One end of the fourth heat exchange portion 1223 is connected to the end of the second heat exchange portion 1221 that is far from the third heat exchange portion 1222. The other end of the fourth heat exchange portion 1223 extends in the first direction away from the second heat exchange portion 1221.

[0307] Please refer to Figure 27 , in some embodiments, the second heat exchange tube 1b includes a U-shaped region 120 having the same structure as the first heat exchange tube 1a. At least a part of the first heat exchange section 121 of the first heat exchange tube 1a is disposed within the U-shaped region 120 of the second heat exchange tube 1b. Then, a part of the first heat exchange section 121 of the first heat exchange tube 1a is disposed within the U-shaped region 120 of the second heat exchange tube 1b, or the entire first heat exchange tube 121 of the first heat exchange tube 1a is disposed within the U-shaped region 120 of the second heat exchange tube 1b.

[0308] In the above technical solution, by arranging at least a part of the first heat exchange section 121 of the first heat exchange tube 1a in the U-shaped area 120 of the second heat exchange tube 1b, the first heat exchange tube 1a and the second heat exchange tube 1a can be arranged around each other. In this way, the winding modes of multiple heat exchange tubes 1 can be arranged according to the heat exchange requirements of different parts of the battery module, further enhancing the heat exchange effect of the first heat exchange member 102 and improving the temperature uniformity of the battery 200.

[0309] Please refer to Figure 27 , in some embodiments, the second heat exchange tube 1b includes a third heat exchange section 123 and a fourth heat exchange section 124 that are bent and connected. The third heat exchange section 123 and the fourth heat exchange section 124 are respectively bent to form a U-shaped area 120. The third heat exchange section 123 is arranged in the U-shaped area 120 of the fourth heat exchange section 124, and at least the above-mentioned part of the first heat exchange section 121 of the first heat exchange tube 1a is arranged in the U-shaped area 120 of the third heat exchange section 123.

[0310] In the embodiments of the present application, the opening directions of the U-shaped areas 120 of the third heat exchange section 123 and the fourth heat exchange section 124 may be the same or different. Exemplarily, the opening directions of the U-shaped areas 120 of the third heat exchange section 123 and the fourth heat exchange section 124 are the same. At this time, the three heat exchange sections of the third heat exchange section 123 and the three heat exchange parts of the fourth heat exchange section 124 can be respectively arranged in parallel, which is convenient for simplifying the arrangement of the second heat exchange tube 1b and is also beneficial to providing an avoidance space for at least the above-mentioned part of the first heat exchange section 121 of the first heat exchange tube 1a to extend into the U-shaped area 120 of the third heat exchange section 123.

[0311] In the above technical solution, by arranging at least the above-mentioned part of the first heat exchange section 121 of the first heat exchange tube 1a in the U-shaped area 120 of the third heat exchange section 123, at least the above-mentioned part of the first heat exchange section 121 of the first heat exchange tube 1a is also located in the U-shaped area 120 of the fourth heat exchange section 124. On the premise of realizing the mutual winding of the first heat exchange tube 1a and the second heat exchange tube 1b, it is convenient to simplify the winding arrangement of the two, and at the same time, it is beneficial to further improve the heat exchange effect and the temperature uniformity of the battery 200.

[0312] Exemplarily, as Figure 27 shown, the third heat exchange section 123 includes a seventh heat exchange part 1231, an eighth heat exchange part 1232, and a ninth heat exchange part 1233. The eighth heat exchange part 1232 and the ninth heat exchange part 1233 are respectively bent and connected to the two ends of the length of the seventh heat exchange part 1231; the fourth heat exchange section 124 includes a tenth heat exchange part 1241, an eleventh heat exchange part 1242, and a twelfth heat exchange part 1243. The eleventh heat exchange part 1242 and the twelfth heat exchange part 1243 are respectively bent and connected to the two ends of the length of the tenth heat exchange part 1241.

[0313] Optionally, the seventh heat exchange part 1231 and the tenth heat exchange part 1241 extend in parallel, and the eighth heat exchange part 1232, the ninth heat exchange part 1233, the eleventh heat exchange part 1242 and the twelfth heat exchange part 1243 extend in parallel; in other examples, the seventh heat exchange part 1231 and the tenth heat exchange part 1241 may also be arranged at an angle.

[0314] Please refer to Figure 27 , in some embodiments, the second heat exchange tube 1b further includes a fifth heat exchange section 125, and the fifth heat exchange section 125 includes a sixth heat exchange part 1251 and a second bending part 1252. There are multiple sixth heat exchange parts 1251, and the multiple sixth heat exchange parts 1251 are arranged at intervals along the first direction. Each first heat exchange part 1211 extends along the second direction. The second bending part 1252 is bent and connected between two adjacent sixth heat exchange parts 1251 so that the multiple sixth heat exchange parts 1251 are connected in sequence. The second direction is arranged at an angle with the first direction.

[0315] Wherein, a fifth heat exchange section 125 is provided between the third heat exchange section 123 and the fourth heat exchange section 124; and / or, a fifth heat exchange section 125 is provided between the third heat exchange section 123 and the corresponding port 11 (that is, the port 11 corresponding to the end of the third heat exchange section 123 far from the fourth heat exchange section 124). It can be seen that the fifth heat exchange section 125 is provided at at least one end of the two ends of the length of the third heat exchange section 123. The above-mentioned fifth heat exchange section 125 can be arranged in the U-shaped area 120 of the fourth heat exchange section 124 and outside the U-shaped area 120 of the third heat exchange section 123.

[0316] Optionally, the second bending part 1252 is arc-shaped, and there is a certain angle between the fluid flow directions at both ends of the second bending part 1252. Thus, the second bending part 1252 can change the fluid flow direction, and further enable the two connected sixth heat exchange parts 1251 to extend and be arranged within a preset area, thereby increasing the heat exchange area of the fifth heat exchange section 125 and improving the heat exchange efficiency of the fifth heat exchange section 125. At the same time, the second bending part 1252 is arc-shaped, and the arc shape can reduce the fluid flow resistance and reduce the pressure drop, thereby increasing the fluid flow rate and further increasing the heat exchange efficiency of the fifth heat exchange section 125. Moreover, it can also make the structure of the second heat exchange tube 1b more compact, occupy a smaller space size, and facilitate the miniaturized design of the battery 200.

[0317] Exemplarily, the second bending part 1252 is semi-circular arc-shaped, so as to connect two sixth heat exchange parts 1251 that are parallel and arranged at intervals, which is beneficial to increasing the design diversity of the heat exchange flow channel 10, improving the adaptability of the second heat exchange tube 1b to multiple battery monomers 100, and having a simple structure and being convenient for production. Of course, the bending angle of the second bending part 1252 can also be adjusted according to requirements, for example, it can be 150°, or 135°, etc.

[0318] In addition, the number of the second bending portions 1252 can be one, two, three or more than three. The second bending portions 1252 can make the second heat exchange tube 1b arranged in a meandering manner, which is convenient for increasing the heat exchange area of the second heat exchange tube 1b and improving the heat exchange efficiency.

[0319] In the above technical solution, by providing the fifth heat exchange section 125, it is convenient to further increase the heat exchange area of the second heat exchange tube 1b, improve the heat exchange effect of the second heat exchange tube 1b, and at the same time facilitate the temperature control of the internal battery cells 100. Moreover, the setting of the fifth heat exchange section 125 does not affect the mutual winding between the first heat exchange tube 1a and the second heat exchange tube 1b.

[0320] Please refer to Figure 27 , in some embodiments, the first heat exchange member 102 further includes a third heat exchange tube 1c. At least a part of the third heat exchange tube 1c is bent and arranged in the U-shaped region 120 of the second heat exchange tube 1b. Then, a part of the third heat exchange tube 1c is bent and arranged in the U-shaped region 120 of the second heat exchange tube 1b, or the entire third heat exchange tube 1c is bent and arranged in the U-shaped region 120 of the second heat exchange tube 1b. And at least a part of the third heat exchange tube 1c arranged in the U-shaped region 120 of the second heat exchange tube 1b is non-linear.

[0321] In the above technical solution, by arranging at least a part of the third heat exchange tube 1c to be bent and arranged in the U-shaped region 120 of the second heat exchange tube 1b, it is convenient to further achieve good temperature control of the internal battery cells 100, which is beneficial to improving the temperature distribution of the entire battery 200 and facilitating the improvement of the temperature uniformity of the battery 200.

[0322] It can be understood that when the second heat exchange tube 1b includes a third heat exchange section 123 and a fourth heat exchange section 124 which are bent and connected, and the third heat exchange section 123 and the fourth heat exchange section 124 are respectively bent to form U-shaped regions 120, then at least a part of the third heat exchange tube 1c can be bent and arranged in the U-shaped region 120 of the third heat exchange section 123, and / or at least a part of the third heat exchange tube 1c can be bent and arranged in the U-shaped region 120 of the fourth heat exchange section 124.

[0323] In the embodiments of the present application, there is no specific limitation on the bending setting of the part of the third heat exchange tube 1c arranged in the U-shaped region 120 of the second heat exchange tube 1b. For example, the third heat exchange tube 1c is generally in an S shape, but not limited thereto. Exemplarily, as Figure 27 shown, the third heat exchange tube 1c includes a sixth heat exchange section 126 and a seventh heat exchange section 127. The sixth heat exchange section 126 is bent to form a U-shaped region 120, and the seventh heat exchange section 127 is bent and arranged in the U-shaped region 120 of the sixth heat exchange section 126, and the seventh heat exchange section 127 is bent and connected to the sixth heat exchange section 126.

[0324] Optionally, the seventh heat exchange section 127 includes a thirteenth heat exchange portion 1271 and a third bending portion 1272. There are multiple thirteenth heat exchange portions 1271 arranged at intervals along the first direction, and each thirteenth heat exchange portion 1271 extends along the second direction. The third bending portion 1272 is arc-shaped and is bent and connected between two adjacent thirteenth heat exchange portions 1271 to connect the multiple thirteenth heat exchange portions 1271 in sequence. Of course, the multiple thirteenth heat exchange portions 1271 may also be arranged at intervals along the second direction, and each thirteenth heat exchange portion 1271 extends along the first direction, but is not limited thereto.

[0325] Please refer to Figure 6 , in some embodiments, the fixed beam 105 is configured as a first expansion beam B1, and the fixed beam 105 includes a beam body 1051 and a reinforcing partition 1052. The beam body 1051 defines a cavity 1051a, the reinforcing partition 1052 is disposed in the cavity 1051a, and the reinforcing partition 1052 has a plurality of spaced-apart connecting portions 1052a. The plurality of connecting portions 1052a include a first connecting portion 1052b and a second connecting portion 1052c. The first connecting portion 1052b and the second connecting portion 1052c are respectively connected to opposite side walls of the beam body 1051, so that the reinforcing partition 1052 divides the cavity 1051a into a plurality of chambers 1051b, and the first connecting portion 1052b and the second connecting portion 1052c are arranged in an alternating manner.

[0326] For example, the first connecting portion 1052b and the second connecting portion 1052c are respectively connected to the widthwise two side walls of the beam body 1051. In the height direction of the beam body 1051, the first connecting portion 1052b and the second connecting portion 1052c are arranged in an alternating manner. Then, of the two adjacent connecting portions 1052a, one is the first connecting portion 1052b and the other is the second connecting portion 1052c.

[0327] In the above technical solution, by providing that the first expansion beam B1 includes the beam body 1051 and the reinforcing partition 1052, and the reinforcing partition 1052 is disposed in the cavity 1051a and divides the cavity 1051a of the beam body 1051 into a plurality of chambers 1051b, the reinforcing partition 1052 provides a certain supporting and strengthening effect on the opposite sides of the beam body 1051, which is beneficial to improving the structural strength, load-bearing capacity and structural stability of the first expansion beam B1, thereby improving the use reliability of the first expansion beam B1.

[0328] Exemplarily, the two sides of the beam body 1051 in the width direction are respectively connected to the reinforcing partition 1052, so that the reinforcing partition 1052 can support the beam body 1051 in the width direction of the beam body 1051, and the supporting direction of the reinforcing partition 1052 is substantially opposite to the expansion force direction of the battery cell 100100, realizing reliable support for the battery cell 100100. At this time, each chamber 1051b extends along the length direction of the first expansion beam B1.

[0329] Please refer to Figure 6 In some embodiments, the beam body 1051 includes a first plate body A1 and a second plate body A2 which are oppositely arranged. The first plate body A1 and the second plate body A2 are connected and jointly define a cavity 1051a. The reinforcing partition 1052 is arranged between the first plate body A1 and the second plate body A2, and the reinforcing partition 1052 further has a third connecting portion 1052d. The third connecting portion 1052d is clamped between the first plate body A1 and the second plate body A2, and the third connecting portion 1052d is respectively connected to the first plate body A1 and the second plate body A2.

[0330] Exemplarily, the first plate body A1, the second plate body A2 and the reinforcing partition 1052 respectively extend along the length direction of the first expansion beam B1. The first plate body A1, the reinforcing partition 1052 and the second plate body A2 can be stacked along the width direction of the first expansion beam B1, which facilitates the assembly of the first expansion beam B1. At the same time, the setting of the third connecting portion 1052d is beneficial to improving the connection reliability between the reinforcing partition 1052 and the beam body 1051. It can be seen that the first connecting portion 1052b can be connected to the first plate body A1, and the second connecting portion 1052c can be connected to the second plate body A2.

[0331] In the above technical solution, by setting that the beam body 1051 includes the first plate body A1 and the second plate body A2, and the reinforcing partition 1052 is arranged between the first plate body A1 and the second plate body A2, not only is the connection with the first plate body A1 realized through the first connecting portion 1052b and the third connecting portion 1052d, and the connection with the second plate body A2 is realized through the second connecting portion 1052c and the third connecting portion 1052d, but also the first expansion beam B1 has a simple structure, is convenient to assemble, and has good structural stability.

[0332] Please refer to Figure 6 In some embodiments, the battery 200 further includes a second expansion beam B2 which is spaced from the first expansion beam B1. The battery cell 100 is arranged between the first expansion beam B1 and the second expansion beam B2. A third fixing member 111 is arranged in the cavity 1051a of the first expansion beam B1, a fourth fixing member 112 is arranged in the cavity 1051a of the second expansion beam B2. The battery 200 further includes a pull rope 110. The pull rope 110 penetrates into the corresponding cavity 1051a, and the pull rope 110 is respectively connected to the third fixing member 111 and the fourth fixing member 112.

[0333] In the above technical solution, by setting the pull rope 110 to be connected to the third fixing member 111 and the pull rope 110 to be connected to the fourth fixing member 112, when the battery cell 100 between the first expansion beam B1 and the second expansion beam B2 expands and deforms, the pull rope 110 can apply a force to the first expansion beam B1 and the second expansion beam B2 to resist the expansion force of the battery cell 100 and improve the reliability of the battery 200. Moreover, since the third fixing member 111 and the fourth fixing member 112 are provided in the cavity 1051a of the corresponding expansion beam, even if at least one of the third fixing member 111 and the fourth fixing member 112 fails to be connected to the corresponding expansion beam, the above at least one of the third fixing member 111 and the fourth fixing member 112 can be restricted in the cavity 1051a of the corresponding expansion beam, which is beneficial to reducing the risk that the above at least one of the third fixing member 111 and the fourth fixing member 112 detaches from the corresponding expansion beam and causes the pull rope 110 to fail.

[0334] Optionally, when the battery 200 includes a first expansion beam B1 and a second expansion beam B2, a clearance space 200a may be formed between the first expansion beam B1 and the box body 101, the first heat exchanger 102 is disposed through the clearance space 200a, and no clearance space 200a is formed between the second expansion beam B2 and the box body 101.

[0335] Certainly, the structural form of the fixed beam 105 is not limited to this.

[0336] Please refer to Figure 3 and Figure 16 , in some embodiments, the box body 101 includes a first box body 101. The first box body 101 is an integrally stamped part (for example, the first box body 101 is a sheet metal integrally stamped part), and the first box body 101 includes a bottom wall 1011a and a surrounding wall 1011b. The surrounding wall 1011b is disposed around the bottom wall 1011a, and the fixed beam 105 is respectively connected to the bottom wall 1011a and the surrounding wall 1011b. Among them, at least one of the bottom wall 1011a and the surrounding wall 1011b is provided with a first heat exchanger 102 between it and the battery cell 100, and / or a first heat exchanger 102 is provided between the top wall of the box body 101 and the battery cell 100.

[0337] It can be understood that the surrounding wall 1011b may include a plurality of side walls connected end to end in sequence. The surrounding wall 1011b and the bottom wall 1011a may cooperate to form a receiving space, and the receiving space may form at least part of the internal space of the box body 101. When a first heat exchanger 102 is provided between the surrounding wall 1011b and the battery cell 100, at least one of the plurality of side walls may be provided with a first heat exchanger 102 between it and the battery cell 100.

[0338] In the related art, the bottom wall 1011a and the surrounding wall 1011b of the box body 101 are separate parts, such as a profile box body 101. The two are connected by a plurality of connecting pieces to achieve sealing between the bottom wall 1011a and the surrounding wall 1011b. The number of connecting pieces is large, even up to more than 100, making the assembly of the box body 101 cumbersome and the assembly efficiency low.

[0339] In the above technical solution, by setting the first box body 101 including the bottom wall 1011a and the surrounding wall 1011b as an integrally stamped part, the forming of the first box body 101 is facilitated, which is beneficial to reducing the cost of the first box body 101 and making it easy to have good structural strength; at the same time, the structure of the first box body 101 itself realizes the sealing between the bottom wall 1011a and the surrounding wall 1011b, which is beneficial to improving the sealing performance at the bottom of the first box body 101. Thus, a plurality of connecting pieces such as bolts used to realize the bottom sealing of the first box body 101 in the box body 101 can be saved, the connection process between the bottom wall 1011a and the surrounding wall 1011b is saved, and the assembly efficiency of the box body 101 is improved.

[0340] Please refer to Figure 3 , Figure 16 and Figure 28 , in some embodiments, the box body 101 has a top wall, a bottom wall 1011a and a surrounding wall 1011b. The surrounding wall 1011b is provided between the top wall and the bottom wall 1011a, and at least one of the top wall, the bottom wall 1011a and the surrounding wall 1011b is provided with a first heat exchange member 102.

[0341] In the above technical solution, by setting at least one of the top wall, the bottom wall 1011a and the surrounding wall 1011b to be provided with the first heat exchange member 102, the number and arrangement position of the first heat exchange member 102 can be flexibly set according to actual needs, which is convenient for realizing the diversified design of the battery 200 so as to better meet the actual differentiated needs.

[0342] In some embodiments, the fixed beam 105 is configured as a first expansion beam B1, and the fixed beam 105 abuts against the battery cell 100. The top wall is provided with the first heat exchange member 102, and the first heat exchange member 102 on the top wall is connected to the fixed beam 105. Thus, the first heat exchange member 102 on the top wall can play a certain role in restraining the fixed beam 105, which is beneficial to improving the bearing capacity of the fixed beam 105.

[0343] Please refer to Figure 28 and Figure 29 , in some embodiments, the battery 200 further includes at least one of a second heat exchange member 103 and a third heat exchange member 104. The above at least one of the second heat exchange member 103 and the third heat exchange member 104 is used for heat exchange with the battery cell 100. The second heat exchange member 103 is attached to the outside of the box body 101, and the third heat exchange member 104 is provided between two adjacent battery cells 100.

[0344] When the battery 200 includes the second heat exchange member 103, the second heat exchange member 103 can be attached to the outer wall of the box body 101 so as to achieve heat exchange with the battery cell 100 through the box body 101. Since the second heat exchange member 103 and the battery cell 100 are separated by the box body 101, the insulation setting between the second heat exchange member 103 and the battery cell 100 does not need to be considered, which can simplify the insulation design of the second heat exchange member 103, facilitate the simplification of the setting of the battery 200, reduce the processing difficulty and production cost, and moreover, the second heat exchange member 103 does not occupy the space inside the box body 101, so that the capacity of the battery 200 will not be reduced due to the second heat exchange member 103; and / or, when the battery 200 includes the third heat exchange member 104, the third heat exchange member 104 can perform heat exchange with the adjacent battery cell 100, then the third heat exchange member 104 can perform heat exchange with at least two battery cells 100.

[0345] In the embodiment of the present application, when the battery 200 includes the second heat exchange member 103, the installation position of the second heat exchange member 103 is not specifically limited; for example, the second heat exchange member 103 can be arranged on the lower side of the bottom wall 1011a of the box body 101, which is convenient for the second heat exchange member 103 to exchange heat with the battery cells 100 in a relatively large range, and is beneficial to improving the temperature control effect and temperature control efficiency of the battery cells 100. At this time, a bottom protection plate 113 can be arranged below the second heat exchange member 103 to protect the second heat exchange member 103 more reliably, reduce the risk of damage to the second heat exchange member 103 due to collision and bump, and improve the working reliability of the second heat exchange member 103.

[0346] In the above technical solution, by setting that the battery 200 includes at least one of the second heat exchange member 103 and the third heat exchange member 104, it is beneficial to improve the temperature control ability of the heat exchange assembly 1020 for the battery cell 100, improve the thermal management performance of the battery 200, and at the same time, it is convenient to control the temperature of the battery cell 100 by using different heat transfer paths according to the different heat exchange requirements of the battery cell 100.

[0347] In a second aspect, an electrical device 1000 provided by an embodiment of the present application includes the above battery 200, and the battery 200 is used to provide electric energy.

[0348] In the above technical solution, since the electrical device 1000 adopts the above battery 200, it is beneficial to improve the use reliability of the electrical device 1000.

[0349] Please refer to the drawings again to describe the battery 200 of the specific embodiment of the present application.

[0350] Embodiment 1

[0351] Reference Figures 16 - 19 and Figure 23, the battery 200 includes a box body 101, a fixed beam 105, and a plurality of battery cells 100, and all the battery cells 100 are arranged inside the box body 101; the battery 200 further includes a first heat exchanger 102, and the first heat exchanger 102 and the fixed beam 105 are arranged in the box body 101 at intervals, so that heat insulation is provided between the first heat exchanger 102 and the fixed beam 105. The first heat exchanger 102 is located between the box body 101 and the battery cells 100 for heat exchange with all the battery cells 100. The box body 101 includes a first box body 101 and a second box body 102. The first box body 101 is a sheet metal integrally stamped part and includes a bottom wall 1011a and a surrounding wall 1011b. The surrounding wall 1011b is arranged around the bottom wall 1011a, and the first heat exchanger 102 is located between the bottom wall 1011a and the battery cells 100.

[0352] The fixed beam 105 is configured as a first expansion beam B1. The battery 200 further includes a second expansion beam B2. The first expansion beam B1 divides the internal space of the box body 101 into a first chamber 101a and a second chamber 101b. The second expansion beam B2 is arranged in the first chamber 101a. All the battery cells 100 are arranged in the first chamber 101a and are located between the first expansion beam B1 and the second expansion beam B2. An avoidance channel 200a is formed between the first expansion beam B1 and the box body 101; the first heat exchanger 102 passes through a corresponding avoidance channel 200a, so that the first heat exchanger 102 extends from the first chamber 101a to the second chamber 101b, and the wall surface of the first expansion beam B1 corresponding to the avoidance channel 200a is arranged at an interval from the first heat exchanger 102. Wherein, the box body 101 has a first recess 101c, and the second recess 101c forms at least a part of the avoidance channel 200a. Of course, the first heat exchanger 102 can also pass through a plurality of avoidance channels 200a.

[0353] A heat insulation member 107 is arranged between the first expansion beam B1 and the bottom wall 1011a of the box body 101. The heat insulation member 107 is an integral part and includes a first heat insulation part 1071 and a second heat insulation part 1072. The first heat insulation part 1071 is arranged between the wall surface of the first expansion beam B1 corresponding to the avoidance channel 200a and the first heat exchanger 102, and the second heat insulation part 1072 is arranged between the part of the bottom wall 1011a of the box body 101 other than the corresponding part of the avoidance channel 200a and the first expansion beam B1.

[0354] The first heat exchanger 102 includes two heat exchange tubes 1. Each heat exchange tube 1 respectively has two ends. One end defines a first port 11a, and the other end defines a second port 11b. The circumferential side of the first heat exchanger 102 includes two sides arranged oppositely along a first direction X1 and two sides arranged oppositely along a second direction X2. The first box body 101 and the second box body 102 are arranged oppositely along a fifth direction X5.

[0355] Taking the first direction X1 as the left - to - right direction, the second direction X2 as the back - to - front direction, and the fifth direction X5 as the bottom - to - top direction as examples, the above three directions are perpendicular to each other pairwise:

[0356] The two heat exchange tubes 1 of the first heat exchange member 102 are arranged at intervals in the left - right direction. Each heat exchange tube 1 is formed by bending a single tube. The heat exchange tube 1 is arc - bent at the bending position. Each heat exchange tube 1 is a flat tube or a corrugated tube, and the thickness direction of the heat exchange tube 1 is the X5 direction. Each heat exchange tube 1 further includes a communication section 12 connected between two ends. The central axes of at least the communication sections 12 of all the heat exchange tubes 1 are located in the same plane to better cooperate with the battery cell 100.

[0357] Each heat exchange tube 1 is respectively configured as a first heat exchange tube 1a. The communication section 12 of the first heat exchange tube 1a includes a first heat exchange section 121 and a second heat exchange section 122. The second heat exchange section 122 is bent to form a U - shaped region 120. The first heat exchange section 121 is bent and arranged within the U - shaped region of the second heat exchange section 122, and the first heat exchange section 121 is bent and connected to the second heat exchange section 122. The communication sections 12 of the two heat exchange tubes 1 can be symmetrically arranged about the center line of the first heat exchange member 102 perpendicular to the left - right direction.

[0358] The first heat exchange section 121 includes a first heat exchange part 1211 and a first bending part 1212. There are multiple first heat exchange parts 1211 arranged at intervals in the first direction. Each second heat exchange part 1211 extends linearly in the second direction. The first bending part 1212 is arc - shaped and is bent and connected between two adjacent first heat exchange parts 1211 so that the multiple first heat exchange parts 1211 are connected in sequence.

[0359] The second heat exchange section 122 includes a second heat exchange part 1221, a third heat exchange part 1222, a fourth heat exchange part 1223, and a fifth heat exchange part 1224. The second heat exchange part 1221 extends along the right circumferential edge of the first heat exchange section 121 (the second heat exchange part 1221 extends in the second direction). The third heat exchange part 1222 is connected between the second heat exchange part 1221 and the first heat exchange section 121 and extends along the rear circumferential edge of the first heat exchange section 121 (the third heat exchange part 1222 extends in the first direction). The first end of the third heat exchange part 1222 is connected to the second heat exchange part 1221 at an angle of approximately 90°. The second end of the third heat exchange part 1222 is connected to the first heat exchange section 121 at an angle of approximately 90°. The fourth heat exchange part 1223 communicates with the second heat exchange part 1221 and is connected to the second heat exchange part 1221 at an angle of approximately 90°. The fourth heat exchange part 1223 extends along the front circumferential edge of the first heat exchange section 121 (the fourth heat exchange part 1223 extends in the first direction), such that the opening of the U-shaped area 120 formed by the second heat exchange part 1221, the third heat exchange part 1222, and the fourth heat exchange part 1223 faces left. The fifth heat exchange part 1224 extends along the left circumferential edge of the first heat exchange section 121 and closes at least part of the opening of the U-shaped area 120 formed by the second heat exchange part 1221, the third heat exchange part 1222, and the fourth heat exchange part 1223. One end of the fifth heat exchange part 1224 is bent and connected to the third heat exchange part 1222, and the other end is connected to the first bending part 1212.

[0360] The first heat exchange tube 1a further includes an eighth heat exchange section 128. The first heat exchange section 12 is connected between the eighth heat exchange section 128 and the second heat exchange section 122, and the eighth heat exchange section 128 is connected to the first heat exchange section 121 at an angle of approximately 90°. The eighth heat exchange section 128 is bent and connected to one of the ends of the heat exchange tube 1, and the fourth heat exchange part 1223 is bent and connected to the other end of the heat exchange tube 1.

[0361] Embodiment 2

[0362] Referring to Figure 3 、 Figures 20 - 22 and in combination with Figure 11 , the structure of this embodiment is substantially the same as that of Embodiment 1, where the same components use the same reference numerals. The differences are only as follows: The first expansion beam B1 has a first concave portion 105a. The first concave portion 105a and the second concave portion 101c are configured to avoid the channel 200a. The first heat exchange member 102 further includes a current collector 2. The current collectors 2 correspond to the avoidance channels 200a one by one. The current collector 2 connects multiple ends and is disposed in the second cavity 101b. The avoidance channel 200a is configured to allow the current collector 2 to pass through. Each avoidance channel 200a is respectively provided with a carrier 106, and the carrier 106 abuts against the battery cell 100. Among them, the multiple ends connected by the current collector 2 may belong to the same heat exchange tube 1 or different heat exchange tubes 1.

[0363] The battery 200 further includes a third expansion beam B3, which is disposed at intervals between the first expansion beam B1 and the second expansion beam B2. The box body 101 is formed with a third recess 101d, and the third recess 101d is configured as an avoidance space. The part of the first heat exchanger 102 disposed in the first cavity 101a penetrates through the avoidance space. The third expansion beam B3 is spaced from the first heat exchanger 102 to achieve heat insulation, and the third expansion beam B3 is in contact with the part of the wall of the box body 101 except the third recess 101d.

[0364] The three heat exchange tubes 1 of the first heat exchanger 102 are respectively a first heat exchange tube 1a, a second heat exchange tube 1b, and a third heat exchange tube 1c. The communication section 12 of the first heat exchange tube 1a includes a first heat exchange section 121 and a second heat exchange section 122. The second heat exchange section 122 is bent to form a U-shaped region 120. The first heat exchange section 121 is bent and disposed within the U-shaped region of the second heat exchange section 122, and the first heat exchange section 121 is bent and connected to the second heat exchange section 122; the first heat exchange section 121 includes a first heat exchange portion 1211 and a first bending portion 1212. The first heat exchange portions 1211 are multiple and arranged at intervals along the first direction. Each second heat exchange portion 1211 extends linearly along the second direction. The first bending portion 1212 is arc-shaped and is bent and connected between two adjacent first heat exchange portions 1211, so that the multiple first heat exchange portions 1211 are connected in sequence; the second heat exchange section 122 includes a second heat exchange portion 1221, a third heat exchange portion 1222, and a fourth heat exchange portion 1223. The second heat exchange portion 1221, the third heat exchange portion 1222, and the fourth heat exchange portion 1223 form the U-shaped region 120. The second heat exchange portion 1221 extends along the first direction, the third heat exchange portion 1222 extends along the second direction, and the fourth heat exchange portion 1223 extends along the second direction.

[0365] At least the communicating section 12 of the second heat exchange tube 1a is disposed within the U-shaped region 120 of the first heat exchange tube 1a. For the second heat exchange tube 1a: its communicating section 12 includes a third heat exchange section 123, a fourth heat exchange section 124, and a fifth heat exchange section 125. The third heat exchange section 123 and the fourth heat exchange section 124 are respectively bent to form a U-shaped region 120. The third heat exchange section 123 and the fourth heat exchange section 124 are bent and connected. The third heat exchange section 123 is disposed within the U-shaped region 120 of the fourth heat exchange section 124. At least a part of the first heat exchange section 121 of the first heat exchange tube 1a is disposed within the U-shaped region 120 of the third heat exchange section 123. Among them, the three side edges corresponding to the U-shaped region 120 of the third heat exchange section 123 are respectively parallel to the three side edges corresponding to the U-shaped region 120 of the fourth heat exchange section 124. The fifth heat exchange section 125 is connected to one end of the third heat exchange section 123 away from the fourth heat exchange section 124 and includes a sixth heat exchange portion 1251 and a second bending portion 1252. The sixth heat exchange portions 1251 are multiple and arranged at intervals along the first direction. Each sixth heat exchange portion 1251 extends along the second direction. The second bending portion 1252 is arc-shaped and is bent and connected between two adjacent sixth heat exchange portions 1251 so that the multiple sixth heat exchange portions 1251 are sequentially connected.

[0366] Embodiment III

[0367] Refer to Figure 4 and Figure 25 In this embodiment, the structure is substantially the same as that of Embodiment I, where the same components are denoted by the same reference numerals. The difference lies only in that: one of the two heat exchange tubes 1 of the first heat exchange member 102 is configured as the first heat exchange tube 1a, and the other is configured as the second heat exchange tube 1b; on one side of the first heat exchange member 102 in the second direction, there are two current collectors 2 corresponding thereto. The first ports 11a of all the heat exchange tubes 1 extend to one of the current collectors 2, and the second ports 11b of all the heat exchange tubes 1 extend to the other current collector 2.

[0368] The connecting section 12 of the first heat exchange tube 1a includes a first heat exchange section 121 and a second heat exchange section 122. The second heat exchange section 122 is bent to form a U-shaped area 120. The first heat exchange section 121 is bent and disposed within the U-shaped area of the second heat exchange section 122, and the first heat exchange section 121 is bent and connected to the second heat exchange section 122. The first heat exchange section 121 includes a first heat exchange portion 1211 and a first bending portion 1212. The first heat exchange portions 1211 are multiple and arranged at intervals along a first direction. Each second heat exchange portion 1211 extends linearly along a second direction. The first bending portion 1212 is arc-shaped and is bent and connected between two adjacent first heat exchange portions 1211, so that the multiple first heat exchange portions 1211 are connected in sequence. The second heat exchange section 122 includes a second heat exchange portion 1221, a third heat exchange portion 1222, and a fourth heat exchange portion 1223. The second heat exchange portion 1221, the third heat exchange portion 1222, and the fourth heat exchange portion 1223 form the U-shaped area 120. The second heat exchange portion 1221 extends along the first direction, the third heat exchange portion 1222 extends along the second direction, and the fourth heat exchange portion 1223 extends along the second direction.

[0369] At least the connecting section 12 of the second heat exchange tube 1a is disposed within the U-shaped area 120 of the first heat exchange tube 1a. For the second heat exchange tube 1a: its connecting section 12 includes a first heat exchange section 121 and a second heat exchange section 122. The second heat exchange section 122 is bent to form a U-shaped area 120. The first heat exchange section 121 is bent and disposed within the U-shaped area of the second heat exchange section 122, and the first heat exchange section 121 is bent and connected to the second heat exchange section 122. The first heat exchange section 121 includes a first heat exchange portion 1211 and a first bending portion 1212. The first heat exchange portions 1211 are multiple and arranged at intervals along a first direction. Each second heat exchange portion 1211 extends linearly along a second direction. The first bending portion 1212 is arc-shaped and is bent and connected between two adjacent first heat exchange portions 1211, so that the multiple first heat exchange portions 1211 are connected in sequence. The second heat exchange section 122 includes a second heat exchange portion 1221, a third heat exchange portion 1222, and a fourth heat exchange portion 1223. The second heat exchange portion 1221, the third heat exchange portion 1222, and the fourth heat exchange portion 1223 form the U-shaped area 120. The second heat exchange portion 1221 extends along the first direction, the third heat exchange portion 1222 extends along the second direction, and the fourth heat exchange portion 1223 extends along the second direction.

[0370] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, this application does not separately describe various possible combination methods. In addition, any combination can be made between various different embodiments of this application as long as it does not violate the idea of this application, and it should also be regarded as the content disclosed in this application. That is to say, without conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0371] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A battery, characterized in that: include: Box; A fixed beam is disposed in the box body and divides the internal space of the box body into a first cavity and a second cavity, the fixed beam has a first recess, and / or the wall of the box body has a second recess, and the first recess and / or the second recess construct an escape space connecting the first cavity and the second cavity; A battery cell, disposed in the box and located in the first cavity; A first heat exchange member is arranged in the box body and is located between the battery cell and the box body, the first heat exchange member includes at least one heat exchange tube, the heat exchange tube defines a heat exchange channel, and in the cross section of the heat exchange tube, the thickness of the heat exchange tube is less than the width of the heat exchange tube, the cross section of the heat exchange tube is perpendicular to the central axis of the heat exchange tube, and the first heat exchange member includes a heat exchange part and a connecting part, the heat exchange part is located in the first cavity and is used for heat exchange with the battery cell, the connecting part is formed with a port of the heat exchange channel, the connecting part is passed through the avoidance space from the heat exchange part and extends to the second cavity, so that the port of the heat exchange channel is located in the second cavity, and the avoidance space is configured to allow the connecting part to extend from the first cavity through the avoidance space to the second cavity.

2. The battery according to claim 1, characterized in that A portion of the first heat exchange element located in the first chamber and a portion of the first heat exchange element located in the second chamber are connected at an obtuse angle.

3. The battery according to claim 1 or 2, characterized in that: The battery further includes a current collector that is in communication with the port of the connection portion and is located in the second cavity.

4. The battery according to claim 3, characterized in that The escape space is configured to allow the current collector to move from the first cavity to the second cavity through the escape space.

5. The battery according to claim 3 or 4, characterized in that: The connecting portion has at least two ports, and the current collector, the connecting portion and the avoidance space correspond to each other one by one. The current collector communicates with the plurality of ports corresponding to the connection portion, or the current collector separates the plurality of ports corresponding to the connection portion into a plurality of independent flow channels.

6. The battery according to claim 5, characterized in that There are multiple heat exchange channels, and the two ports of each heat exchange channel are respectively a first port and a second port, the first port is used for liquid inlet, and the second port is used for liquid outlet. There are two current collectors, which are respectively a first current collector and a second current collector, all the first ports are connected to the first current collector, and all the second ports are connected to the second current collector; or, There is one current collector having two separated and independently arranged flow channels, all the first ports are connected to one of the flow channels, and all the second ports are connected to the other flow channel.

7. The battery according to any one of claims 1 to 6, characterized in that The fixed beam is configured as a first expansion beam and has a first mating surface that abuts against the battery cell. The battery further comprises: A carrier is arranged in the avoidance space and has a second mating surface that stops against the battery cell, the first mating surface is arranged flush with the second mating surface, and the carrier has a groove that avoids the connecting part, and the groove runs through the outer peripheral side of the carrier.

8. The battery according to claim 7, characterized in that A stopper that abuts against the bearing member is formed on at least one of the fixed beam and the box body to limit movement of the bearing member in a direction from the first cavity toward the second cavity.

9. The battery according to claim 8, characterized in that The stopper is formed at the position of the avoidance space on one side of the fixed beam facing the first cavity; and / or, A wall of the box body where the first heat exchange element is disposed is formed with a stop step protruding toward the fixing beam, and the stop step is formed as the stop portion.

10. The battery according to claim 9, characterized in that In the cross section of the fixed beam, the stopper on the fixed beam is formed into an arc structure, and the cross section of the fixed beam is perpendicular to the length direction of the fixed beam.

11. The battery according to any one of claims 7 to 10, characterized in that: The bearing member comprises: A plate body, a surface on one side of the thickness of the plate body is formed as the second mating surface, and the slot runs through both sides of the thickness of the plate body; A matching portion is formed at an outer edge of the plate body and is abutted against the fixing beam to limit movement of the bearing member from the first cavity toward the second cavity.

12. The battery according to claim 11, characterized in that The matching portion has a first surface and a second surface, the first surface is formed as an arc-shaped surface recessed toward the second surface and matched with the fixing beam, and the second surface is connected to the first surface and is arranged flush with the second matching surface.

13. The battery according to claim 11 or 12, characterized in that: At least one clamping hole is formed on the fixing beam, and the bearing member further comprises: At least one hook portion, wherein the hook portion is formed at the outer edge of the plate body and is located at a side of the plate body away from the second mating surface, and the hook portion is clamped in the corresponding clamping hole.

14. The battery according to any one of claims 11 to 13, characterized in that The carrier also includes: At least one supporting portion is provided on a side of the plate portion away from the second mating surface and is arranged to avoid the slot, and the supporting portion is in a stop-butt fit with the box body.

15. The battery according to claim 14, characterized in that The width of the support portion in the thickness direction of the plate body increases from the matching portion toward the first heat exchange member.

16. The battery according to any one of claims 7 to 15, characterized in that: The bearing member is disposed between the first heat exchange member and the fixed beam. The thermal conductivity of the bearing member is lower than the thermal conductivity of the fixed beam; and / or, The bearing component is spaced apart from the first heat exchange component.

17. The battery according to any one of claims 7 to 16, characterized in that: The strength of the material of the bearing member is at least 0.8 times the strength of the material of the fixing beam.

18. The battery according to any one of claims 7 to 17, characterized in that: The first heat exchange element is arranged on the bottom wall of the box body, and one end of the second matching surface facing the first heat exchange element is arranged flush with one end of the first heat exchange element corresponding to the battery cell, or, one end of the second matching surface facing the first heat exchange element is arranged adjacent to the first heat exchange element compared to one end of the first heat exchange element corresponding to the battery cell.

19. The battery according to any one of claims 1 to 18, characterized in that The fixed beam is configured as a first expansion beam, and the fixed beam is spaced apart from the first heat exchange member, so that the first heat exchange member and the fixed beam are thermally insulated.

20. The battery according to claim 19, characterized in that A second recess is formed on the wall of the box body, the second recess forms at least a portion of the escape space, and a portion of the first heat exchange element that passes through the escape space is disposed in the second recess. The fixing beam is in contact with the wall of the box except for the second recessed portion; or, The fixing beam is spaced apart from a portion of the wall of the box body except the second recessed portion.

21. The battery according to claim 20, characterized in that The battery also includes: The heat insulating member includes a first heat insulating portion, and the first heat insulating portion is arranged between the wall surface of the fixed beam corresponding to the escape space and the connecting portion.

22. The battery according to claim 21, characterized in that The heat insulating member further includes a second heat insulating portion, which is disposed between a portion of the wall of the box body excluding the second recess and the fixing beam.

23. The battery according to claim 22, characterized in that The fixed beam is further provided with a first fixing member, at least a portion of which is located inside the fixed beam. The battery further includes a second fixing member, which is arranged through the box body, the second heat insulating portion and the fixing beam and is connected to the first fixing member.

24. The battery according to any one of claims 1 to 23, characterized in that The heat exchange tube is a flat tube or a harmonica tube.

25. The battery according to any one of claims 1 to 24, characterized in that The first heat exchange element includes at least one heat exchange tube, at least one of the heat exchange tubes is configured as a first heat exchange tube, the first heat exchange tube includes a first heat exchange section and a second heat exchange section, the second heat exchange section is bent to form a U-shaped area, the first heat exchange section is bent and arranged in the U-shaped area, and is bent and connected to the second heat exchange section.

26. The battery according to claim 25, characterized in that The first heat exchange section includes a first heat exchange part and a first bending part. There are multiple first heat exchange parts and they are arranged at intervals along the first direction. Each first heat exchange part extends along the second direction. The first bending part is arc-shaped and is bent and connected between two adjacent first heat exchange parts so that multiple first heat exchange parts are connected in sequence. The second direction is set at an angle to the first direction.

27. The battery according to claim 25 or 26, characterized in that The second heat exchange section includes a second heat exchange part, a third heat exchange part and a fourth heat exchange part, the second heat exchange part extends along the first side circumference of the first heat exchange section, the third heat exchange part is connected between the second heat exchange part and the first heat exchange section, and extends along the second side circumference of the first heat exchange section, the first end of the third heat exchange part is connected to the second heat exchange part at an angle, the second end of the third heat exchange part is connected to the first heat exchange section at an angle, the fourth heat exchange part is in communication with the second heat exchange part, and is connected to the second heat exchange part at an angle, and the fourth heat exchange part extends along the third side circumference of the first heat exchange section.

28. The battery according to claim 27, characterized in that The first heat exchange section includes a plurality of first heat exchange parts, and the plurality of first heat exchange parts are bent and connected in sequence in a first direction; wherein, The second heat exchange portion is located on one side of the plurality of first heat exchange portions along the first direction, the third heat exchange portion is located on one side of the plurality of first heat exchange portions along the second direction, and the first direction and the second direction are arranged at an angle; a first end of the third heat exchange portion is connected to one end of the second heat exchange portion along the second direction, a second end of the third heat exchange portion is connected to one of the plurality of first heat exchange portions that is farthest from the second heat exchange portion along the first direction, the fourth heat exchange portion is located on the other side of the plurality of first heat exchange portions along the second direction, one end of the fourth heat exchange portion is connected to one end of the second heat exchange portion that is away from the third heat exchange portion, and the other end of the fourth heat exchange portion extends along the first direction toward a direction away from the second heat exchange portion; or, The second heat exchange part is located on one side of the multiple first heat exchange parts along the second direction, the third heat exchange part is located on one side of the multiple first heat exchange parts along the first direction, and the first direction and the second direction are arranged at an angle; the first end of the third heat exchange part is connected to one end of the second heat exchange part along the first direction, the second end of the third heat exchange part is connected to one of the multiple first heat exchange parts that is closest to the third heat exchange part along the first direction, the fourth heat exchange part is located on the other side of the multiple first heat exchange parts along the first direction, one end of the fourth heat exchange part is connected to one end of the second heat exchange part away from the third heat exchange part, and the other end of the fourth heat exchange part extends along the second direction toward a direction away from the second heat exchange part.

29. The battery according to claim 28, characterized in that The second heat exchange section further includes: a fifth heat exchange portion, which extends along a fourth side periphery of the first heat exchange section and closes at least a portion of an opening of the U-shaped region formed by the second heat exchange portion, the third heat exchange portion and the fourth heat exchange portion.

30. The battery according to any one of claims 25 to 29, characterized in that The first heat exchange member also includes a second heat exchange tube, which is arranged on the same side of the battery cell as the first heat exchange tube, and at least a portion of the second heat exchange tube is bent and arranged in the U-shaped area of ​​the first heat exchange tube, and the bending structure of the second heat exchange tube is the same as or different from the bending structure of the first heat exchange tube.

31. The battery according to claim 30, characterized in that The second heat exchange tube includes a U-shaped region with the same structure as the first heat exchange tube, and at least a portion of the first heat exchange section of the first heat exchange tube is disposed in the U-shaped region of the second heat exchange tube.

32. The battery according to claim 31, characterized in that The second heat exchange tube includes a third heat exchange section and a fourth heat exchange section which are bent and connected, and the third heat exchange section and the fourth heat exchange section are respectively bent to form the U-shaped area, and the third heat exchange section is arranged in the U-shaped area of ​​the fourth heat exchange section, and at least a part of the first heat exchange section of the first heat exchange tube is arranged in the U-shaped area of ​​the third heat exchange section.

33. The battery according to claim 32, characterized in that The second heat exchange tube further includes a fifth heat exchange section, the fifth heat exchange section includes a sixth heat exchange portion and a second bending portion, the sixth heat exchange portions are multiple and are arranged at intervals along the first direction, each of the first heat exchange portions extends along the second direction, the second bending portion is arc-shaped and is bent and connected between two adjacent sixth heat exchange portions, so that the multiple sixth heat exchange portions are connected in sequence, and the second direction is arranged at an angle to the first direction. Wherein, the fifth heat exchange section is provided between the third heat exchange section and the fourth heat exchange section, and / or the fifth heat exchange section is provided between the third heat exchange section and the corresponding port.

34. The battery according to any one of claims 30 to 33, characterized in that The first heat exchange member further includes a third heat exchange tube, and at least a portion of the third heat exchange tube is bent and disposed in the U-shaped region of the second heat exchange tube.

35. The battery according to any one of claims 1 to 34, characterized in that The fixed beam is configured as a first expansion beam and comprises: a beam body, the beam body defining a cavity; A reinforcing partition is arranged in the cavity and has a plurality of connection parts arranged at intervals, the plurality of connection parts include a first connection part and a second connection part, the first connection part and the second connection part are respectively connected to the opposite side walls of the beam body, so that the reinforcing partition divides the cavity into a plurality of chambers, and the first connection part and the second connection part are staggered.

36. The battery according to claim 35, characterized in that The beam body includes a first plate body and a second plate body arranged opposite to each other, the first plate body and the second plate body are connected and jointly define the cavity, the reinforcing partition is arranged between the first plate body and the second plate body and has a third connecting portion, the third connecting portion is clamped between the first plate body and the second plate body and connected to the first plate body and the second plate body.

37. The battery according to claim 35 or 36, characterized in that The battery also includes a second expansion beam spaced apart from the first expansion beam, the battery cell is arranged between the first expansion beam and the second expansion beam, a third fixing member is arranged in the cavity of the first expansion beam, a fourth fixing member is arranged in the cavity of the second expansion beam, and the battery also includes a pull rope, which is passed through the corresponding cavity and is respectively connected to the third fixing member and the fourth fixing member.

38. The battery according to any one of claims 1 to 37, characterized in that The box body includes a first box body, which is an integral stamped part and includes a bottom wall and a surrounding wall, the surrounding wall is arranged around the bottom wall, the fixed beam is connected to the bottom wall and the surrounding wall respectively, and at least one of the bottom wall and the surrounding wall is provided with the first heat exchange component.

39. The battery according to any one of claims 1 to 38, characterized in that The box body has a top wall, a bottom wall and a surrounding wall. The surrounding wall is arranged between the top wall and the bottom wall. The first heat exchange element is arranged on at least one of the top wall, the bottom wall and the surrounding wall.

40. The battery according to claim 39, characterized in that The fixed beam is configured as a first expansion beam and abuts against the battery cell. The top wall is provided with the first heat exchange member, and the first heat exchange member on the top wall is connected to the fixed beam.

41. The battery according to any one of claims 1 to 40, characterized in that The battery also includes at least one of a second heat exchange member and a third heat exchange member, wherein the at least one of the second heat exchange member and the third heat exchange member is used for heat exchange with the battery cell, the second heat exchange member is attached to the outside of the box, and the third heat exchange member is arranged between two adjacent battery cells.

42. An electrical device, characterized in that: Comprising a battery according to any one of claims 1-41.

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