Batteries and electrical devices

Abstract

The present application discloses a battery and an electric device, wherein the battery comprises a box, a fixed beam, a battery cell and a first heat exchanger, wherein the fixed beam is arranged in the box and divides the internal space of the box into a first cavity and a second cavity, wherein the fixed beam and / or the box form an escape space connecting the first cavity and the second cavity, wherein the battery cell is arranged in the box and located in the first cavity, wherein the first heat exchanger is arranged in the box and located between the battery cell and the box, wherein the first heat exchanger forms at least one heat exchange channel and comprises a heat exchange part and a connection part, wherein the heat exchange part is located in the first cavity and is used for heat exchange with the battery cell, wherein the connection part forms a port of the heat exchange channel, wherein the connection part passes through the escape 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. Thus, the reliability of the battery can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable and important role. Among them, batteries, as the core components of new energy vehicles, have high requirements in terms of reliability. Summary of the invention

[0003] The present application provides a battery and an electrical device, which can improve the reliability of the battery.

[0004] In a first aspect, an embodiment of the present application provides a battery, comprising: a box body; a fixed beam, which is arranged in the box body and divides the internal space of the box body into a first cavity and a second cavity, and the fixed beam and / or the box body forms an escape space connecting the first cavity and the second cavity; a battery cell, which is arranged in the box body and located in the first cavity; a first heat exchange element, which is arranged in the box body and located between the battery cell and the box body, and the first heat exchange element forms at least one heat exchange channel and comprises 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, and the connecting part forms a port of the heat exchange channel, and the connecting part passes through the escape 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.

[0005] In the above technical solution, an avoidance space is formed in the fixed beam, and the connecting part is arranged in 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, which facilitates the assembly of the first heat exchange element and the fixed beam, and facilitates the connection part of the first heat exchange element to extend to the second cavity without being greatly bent around the fixed beam, which is beneficial to simplifying the structure of the first heat exchange element; at the same time, the setting of the above avoidance space can make the ports of the heat exchange channel all located in the second cavity, that is, the ports of the heat exchange channel and the battery cell are separated by the fixed beam to be located in different cavities respectively, which is beneficial to the box body to provide a suitable layout space for the connection between the first heat exchange element and other components. At the same time, even if the heat exchange medium leaks at the port position of the first heat exchange element, the leaked heat exchange medium is not easy to flow to the battery cell position at the first time, which is beneficial to reduce the influence of the heat exchange medium leakage at the port position of the first heat exchange element on the battery cell, and is beneficial to improve the reliability of the battery.

[0006] In some embodiments, the fixing beam has a first recess, and / or the wall of the box has a second recess, and the first recess and / or the second recess configure an escape space.

[0007] In the above technical solution, an avoidance space is constructed by setting the first recess and / or the second recess, so that the avoidance space is arranged between the box body and the fixed beam. The connecting part passing through the avoidance space can be closer to the wall arrangement of the first heat exchanger corresponding to the arrangement of the box body, which is beneficial to reducing the distance between the connecting part and the heat exchange part in the normal direction of the above-mentioned wall of the box body, and even beneficial to prevent the connecting part and the heat exchange part from bending at the connecting position, which is beneficial to simplifying the structure of the first heat exchanger and facilitating processing.

[0008] In some embodiments, the avoidance space is configured to allow the connection portion to pass through.

[0009] In the above technical solution, the avoidance space is configured to allow the connection part to pass through, that is, the avoidance space allows the connection part to pass through, and the avoidance space can allow the connection part to extend from the first cavity to the second cavity through the avoidance space. Then, when assembling the battery, you can choose the assembly method of "first assemble the box body and the fixed beam, and then install the first heat exchange component on the box body". 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 component is installed", which is beneficial to improving the convenience of assembly.

[0010] In some embodiments, 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.

[0011] In the above technical scheme, by setting the parts of the first heat exchanger located on the opposite sides of the fixed beam to be connected at an obtuse angle, during the assembly process of the first heat exchanger, the first part is first aligned with the avoidance space, and the second part is roughly inclined at this time. As the first part is inserted, the inclination angle of the second part gradually decreases until the first part passes through the avoidance space to complete the insertion of the first heat exchanger. At this time, the heat exchange part of the first heat exchanger can be fitted with the corresponding wall of the box body, which facilitates the insertion of the first heat exchanger and is beneficial to improving the installation convenience of the first heat exchanger. Moreover, the above assembly method is particularly suitable for 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 constructed as follows: 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 set on the corresponding wall along the normal direction of the corresponding wall of the box body, which can be beneficial to the assembly method in the above scheme, realize the smooth installation of the first heat exchanger, and at the same time help to increase the heat exchange area of ​​the heat exchange part.

[0012] In some embodiments, the battery further includes a current collector, the current collector is in communication with the port of the connecting portion, and the current collector is located in the second cavity.

[0013] In the above technical solution, by setting the collector to be connected with the port, the heat exchange medium flows through the collector to the heat exchange channel, and\or the heat exchange medium after heat exchange in the heat exchange channel flows through the port to the collector, so as to realize the circulation of the heat exchange medium; since the collector is located in the second cavity, the connection position between the collector and other components except the first heat exchange element is also located in the second cavity, even if the heat exchange medium leaks at the connection position between the collector and the above-mentioned other components, the leaked heat exchange medium is not easy to flow to the first cavity where the battery cell is located at the first time, which is beneficial to reduce the impact of the heat exchange medium leakage at the collector on the battery cell and to improve the reliability of battery use.

[0014] In some embodiments, the escape space is configured to allow the current collector to pass through.

[0015] In the above technical solution, by setting the avoidance space to allow the current collector to pass through, the avoidance space can allow the current collector to move from the first cavity to the second cavity through the avoidance space. Then, when assembling the battery, you can choose the assembly method of "first assemble the box body and the fixed beam, assemble the first heat exchange component and the current collector, and then assemble the completed first heat exchange component and the current collector to the box body". 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 component is installed", which is beneficial to take into account both the assembly convenience and protection capability of the battery.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] In some embodiments, a stopper that cooperates with the support member is formed on at least one of the fixed beam and the box body to limit the movement of the support member from the first cavity toward the second cavity.

[0023] In the above technical scheme, a stopper 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 toward the second direction, so as to realize reliable limitation of the carrier in the width direction of the fixed beam. At the same time, the stopper can resist the expansion force exerted by the battery cell on the carrier, which is beneficial to improve the carrying capacity of the carrier, so that the carrier can stably withstand the expansion force of the battery cell and reduce the probability of the carrier moving toward the second cavity under the action of the battery cell; and if at least one of the fixed beam and the box body is also connected and fixed to the carrier by other means, such as at least one of the fixed beam and the box body is bonded to the carrier, the above scheme is beneficial to reduce the force borne by other connection methods between at least one of the fixed beam and the box body and the carrier, which is beneficial to improve the setting reliability and stability of the carrier.

[0024] In some embodiments, a stop portion is formed on one side of the fixed beam facing the first cavity at the avoidance space position; and / or, a wall of the box body where the first heat exchange element is arranged is formed with a stop step protruding toward the fixed beam, and the stop step is formed as the stop portion.

[0025] In the above technical scheme, a stop portion is formed at the avoidance space position by setting a side of the fixed beam facing the first cavity, so that the stop portion can be limited by the fixed beam's own structure to achieve the limitation of the load-bearing member, without the need for a separate setting, which is conducive 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 for matching with the installation method of the load-bearing member "cooperating with the avoidance space along the direction from the first cavity to the second cavity", so that the stop portion will not interfere with the assembly of the load-bearing member, which is conducive to improving the convenience of assembly; a stop step protruding toward the fixed beam is formed by setting the wall of the box body, and the stop step is formed as the stop portion, so that the stop portion can be limited by the box body's own structure to achieve the limitation of the load-bearing member, without the need for a separate setting, which is conducive to simplifying the structure of the box body. At the same time, the setting of the stop step will not affect the sealing of the box body's own structure.

[0026] In some embodiments, in a cross section of the fixed beam, the stopper on the fixed beam is formed as an arc-shaped structure, and the cross section of the fixed beam is perpendicular to the length direction of the fixed beam.

[0027] In the above technical solution, the stopper portion on the fixed beam is formed into an arc structure by being arranged on the cross section of the fixed beam, so that under the premise that the stopper portion can limit the movement of the bearing member, the portion of the bearing member that cooperates with the stopper portion can be avoided to a certain extent. At the same time, combined with the fact that the stopper portion is located on the side of the fixed beam facing the first cavity, it is convenient to improve the bearing member that is easy to protrude from the first mating surface toward the first cavity due to the cooperation with the stopper portion, and it is convenient to realize the flush setting of the second mating surface with the first mating surface. In addition, when the portion of the fixed beam corresponding to the stopper portion is an integrally formed bent plate, the stopper portion can be located at the bending position of the plate, so that the formation of the stopper portion can be directly realized during the forming process of the bent plate, which is conducive to saving the processing steps of the fixed beam, reducing the processing difficulty, and improving production efficiency.

[0028] In some embodiments, the carrier includes: a plate body portion, a surface on one side of the thickness of the plate body portion is formed as a second mating surface, and grooves are opened 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 is abutted against the fixed beam to limit the movement of the carrier along the direction from the first cavity to the second cavity.

[0029] In the above technical scheme, by setting the support member including the plate body portion and the matching portion, the plate body portion can provide a second matching surface with a larger area and relatively flat, thereby improving the shielding ability of the support member to the avoidance space, and the matching portion can realize the limiting of the support member, and realize the reliable installation of the support member, so that the support member has a certain ability to withstand the expansion force of the battery cell, and the support member has a simple structure and is easy to implement; in addition, since the matching portion and the fixed beam are stopped and matched, if the fixed beam is deformed to a certain extent under the action of the battery cell, causing the first matching surface to deviate from the original position and / or original posture, it is convenient for the matching portion to adapt to the deformation of the fixed beam and the second matching surface of the support member to adapt and adjust with the change of the first matching surface, which makes it easy to make the second matching surface always flush with the first matching surface or with a small misalignment to a certain extent.

[0030] In some embodiments, the mating 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 mating with the fixed beam, and the second surface is connected to the first surface and is arranged flush with the second mating surface.

[0031] In the above technical solution, the first surface of the matching part is arranged to be engaged with the fixed beam. Due to the arc-shaped setting of the first surface, it is convenient to achieve the limited matching of the carrier and the fixed beam, and at the same time, it is convenient to prevent the second surface from protruding out of the second matching surface toward the first cavity, and will not affect the matching of the second matching surface with the battery cell; of course, the second surface can also be engaged with the battery cell.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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 component.

[0037] 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.

[0038] 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.

[0039] In the above technical solution, the carrier is arranged between the first heat exchanger and the fixed beam, and at the same time, the thermal conductivity of the carrier is lower than the thermal conductivity of the fixed beam, and / or the carrier and the first heat exchanger are arranged at a distance, which is beneficial to increase the thermal resistance between the first heat exchanger and the fixed beam, reduce the heat exchange between the expansion beam and the first heat exchanger, and to a certain extent, help to increase the proportion of heat or cold transferred from the first heat exchanger to the battery cell, thereby improving the thermal management performance; in addition, when the carrier and the first heat exchanger are arranged at a distance, the risk of interference between the carrier and the first heat exchanger can be reduced during assembly of the carrier, thereby improving the installation convenience of the carrier.

[0040] 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 fixing beam.

[0041] In the above technical solution, by setting the strength of the material of the carrier to be at least 0.8 times the strength of the material of the fixed beam, the carrier itself has a good load-bearing capacity, so that the carrier can reliably and stably withstand the expansion force of the battery cell.

[0042] In some embodiments, the first heat exchange element is arranged on the bottom wall of the box body, and one end of the second mating surface facing the first heat exchange element is arranged flush with one end of the first heat exchange element corresponding to the battery cell facing the first heat exchange element, or, one end of the second mating 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 facing the first heat exchange element.

[0043] In the above technical solution, by arranging 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 is arranged adjacent to the first heat exchanger compared to one end of the battery cell facing the corresponding first heat exchanger, it is convenient to support the entire surface of the battery cell facing the fixed beam, so as to improve the uniformity of the force applied to the battery cell when it expands and deforms, improve the problems of lithium deposition, liquid leakage, etc. caused by uneven force, thereby improving the reliability of battery use.

[0044] In some embodiments, the fixed beam is configured as a first expansion beam, and the fixed beam is spaced apart from the first heat exchange element so that the first heat exchange element and the fixed beam are thermally insulated.

[0045] In the above technical solution, by arranging the first heat exchange member and the fixed beam to be heat-insulated, the thermal resistance between the first heat exchange member and the fixed beam is improved, which is beneficial to reducing the heat or cold transferred from the first heat exchange member to the fixed beam, which is beneficial to reducing the temperature difference between the fixed beam and the peripheral battery cells abutting against it, and is convenient to improve the consistency of the heat exchange environment between the peripheral battery cells and the internal battery cells, thereby helping to reduce the temperature difference between the peripheral battery cells and the internal battery cells and improve the battery reliability.

[0046] In some embodiments, a second recess is formed on the wall of the box body, and the second recess constructs at least a portion of the avoidance space. The portion of the first heat exchanger that passes through the avoidance space is arranged in the second recess, and the fixed beam is in contact with the wall of the box body except the second recess; or, the fixed beam is spaced apart from the wall of the box body except the second recess.

[0047] In the above technical scheme, by setting the fixed beam and the wall of the box body except the second recessed portion to fit together, for the fixed beam and the above-mentioned wall of the box body, the fixed beam is separated from the wall of the box body at the penetration position of the first heat exchanger, that is, the fixed beam is separated from the second recessed portion, so as to achieve heat insulation between the fixed beam and the first heat exchanger while avoiding the first heat exchanger, and the fixed beam and the wall of the box body are fitted together at the position where the first heat exchanger is not penetrated, that is, the fixed beam and the wall of the box body are zero-fit, which is convenient for increasing the matching area between the fixed beam and the box body, and is beneficial for improving the installation reliability of the fixed beam; by setting the fixed beam and the wall of the box body except the second recessed portion to be spaced apart, it is beneficial for further increasing the interval between the entire fixed beam and the first heat exchanger, which is convenient for improving the thermal resistance between the entire fixed beam and the first heat exchanger, reducing the heat or cold transferred from the first heat exchanger to the fixed beam, and is convenient for improving the energy utilization rate of the first heat exchanger.

[0048] In some embodiments, the battery further includes: a heat insulating member, the heat insulating member includes a first heat insulating portion, and the first heat insulating portion is disposed between a wall surface of the fixed beam corresponding to the avoidance space and the connecting portion.

[0049] In the above technical solution, by arranging the first insulation part between the wall of the expansion beam corresponding to the avoidance channel and the first heat exchanger, the first insulation part corresponds to the second recess, so that the thermal resistance between the fixed beam and the first heat exchanger is further increased by the insulation part.

[0050] In some embodiments, the thermal insulation member further includes a second thermal insulation portion, and the second thermal insulation portion is disposed between a portion of the wall of the box body excluding the second recess and the fixing beam.

[0051] In the above technical solution, by arranging the second heat insulation part between the part of the wall of the box body except the second recess and the fixed beam, it is convenient to clamp the heat insulation component between the box body and the fixed beam, and to realize the reliable installation of the heat insulation component by fixing the fixed beam and the box body, so that the heat insulation component can provide a relatively flat mating surface for the connection between the box body and the fixed beam, and at the same time it is beneficial to reduce the depth of the second recess and improve the molding convenience of the second recess.

[0052] In some embodiments, a first fixing member is further provided on the fixing beam, at least a portion of which is located inside the fixing beam, and the battery further includes a second fixing member, which passes through the box body, the second insulation portion and the fixing beam and is connected to the first fixing member.

[0053] In the above technical solution, at least part of the first fixing member is arranged in the fixing beam, and the second fixing member is arranged through the box body, the second heat insulation part and the fixing beam and connected to the first fixing member, so that the box body, the heat insulation member and the fixing beam are fixed by a simple fixing method, and the heat insulation member is reliably installed; at the same time, the second fixing member can be installed along the direction of the heat insulation member toward the fixing beam, so that there is enough operating space during the assembly of the second fixing member, and the convenience of assembly is improved. In addition, the second fixing member is arranged through the second heat insulation part, so that the second fixing member is separated from the first heat exchange member, so that the setting of the second fixing member will not affect the first heat exchange member.

[0054] In some embodiments, the first heat exchange element includes at least one heat exchange tube, and the heat exchange tube is a flat tube or a harmonica tube.

[0055] In the above technical solution, by setting the heat exchange tube as a flat tube or a harmonica tube, it is helpful to save the space occupied by the heat exchange tube, and at the same time, it is convenient to use the thick side of the heat exchange tube to exchange heat with the battery cell, so as to achieve a balance between the volume energy density and 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 0.7mm. In the related technology, a water-cooled plate structure is adopted. The water-cooled plate usually includes two stacked plates, which are welded and fixed and define a flow channel. For this reason, the thickness of the water-cooled plate is usually thick, which can reach more than 2.4mm. It can be seen that the above-mentioned setting of the present application can reduce the cost of the first heat exchange component, and at the same time save the space occupied by the first heat exchange component, so that when the first heat exchange component is arranged in the box, it can also take into account the improvement of the battery energy density.

[0056] In some embodiments, the first heat exchange element includes at least one heat exchange tube, 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 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.

[0057] In the above technical solution, the second heat exchange section is bent to form a U-shaped area, and the first heat exchange section is bent and arranged in the U-shaped area. When the first heat exchange tube exchanges heat with multiple battery cells, the U-shaped area formed by the outer second heat exchange section can be opposite to the outer battery cells, and the first heat exchange section in the U-shaped area can be opposite to the internal battery cells, so that the first heat exchange tube can make up for the internal and external temperature difference caused by the heat exchange between the outer battery cells and the environment, so that the heat exchange effect of the outer battery cells and the internal battery cells tends to be consistent, thereby improving the temperature uniformity of the battery, thereby improving the battery life to a certain extent.

[0058] In some embodiments, 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 the multiple first heat exchange parts are connected in sequence, and the second direction is set at an angle to the first direction.

[0059] In the above technical solution, on the one hand, by setting up multiple first heat exchange parts, the heat exchange area of ​​the first heat exchange section can be increased, and then the heat exchange area of ​​the first heat exchange tube can be increased, so that the heat exchange effect of the first heat exchange tube can be improved; on the other hand, since the internal battery cells are wrapped by the external battery cells, the temperature difference between the internal battery cells is not large. Therefore, by setting up multiple first heat exchange parts, the overall heat exchange effect can be guaranteed while ensuring that the temperature difference between the internal and external battery cells is small.

[0060] In some embodiments, 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 connected to 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.

[0061] In the above-mentioned embodiment, by arranging the second heat exchange part, the third heat exchange part and the fourth heat exchange part on three sides of the first heat exchange section respectively, the second heat exchange section can surround the first heat exchange section, thereby increasing the compactness of the arrangement of the first heat exchange tube, realizing the miniaturization of the structure of the first heat exchange tube, which is beneficial to improving the volume energy density of the battery. At the same time, the structure of the first heat exchange tube can be simplified, and the processing and production of the first heat exchange component can be facilitated.

[0062] 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 bent and connected in sequence in the 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, and the third heat exchange part is located on one side of the plurality of first heat exchange parts 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 part is connected to one end of the second heat exchange part along the second direction, and a second end of the third heat exchange part is connected to one of the plurality of first heat exchange parts that is farthest from the second heat exchange part along the first direction, and a fourth heat exchange part is located on the other side of the plurality of first heat exchange parts along the second direction, and one end of the fourth heat exchange part is connected to one end of the second heat exchange part that is farthest from the third heat exchange part, and the other end of the fourth heat exchange part is connected to the other end of the second heat exchange part that is farthest from the third heat exchange part. One end extends along the first direction toward a direction away from the second heat exchange part; or, the second heat exchange part is located on one side of the multiple first heat exchange parts along the second direction, and 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, and 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.

[0063] In the above-mentioned embodiment, a plurality of first heat exchange parts are provided and bent and connected in sequence 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 limited, the layout of the first heat exchange tube is further limited, the structure of the first heat exchange tube is simplified, and processing and manufacturing are facilitated.

[0064] In some embodiments, the second heat exchange section further includes: a fifth heat exchange portion, which extends along the fourth side periphery of the first heat exchange section and closes at least part of the opening of the U-shaped area formed by the second heat exchange portion, the third heat exchange portion and the fourth heat exchange portion.

[0065] In the above technical solution, by setting the fifth heat exchange part, the second heat exchange section can exchange heat on the four sides of the assembly composed of all battery cells. In this way, the second heat exchange section of a first heat exchange tube can be used to exchange heat on the four sides of the assembly composed of multiple battery cells, which is beneficial to improving the heat exchange effect on the four sides of the battery and improving the temperature uniformity of the battery.

[0066] In some embodiments, the first heat exchange element also includes a second heat exchange tube, the second heat exchange tube and the first heat exchange tube are arranged on the same side of the battery cell, at least part 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.

[0067] In the above technical solution, by setting the second heat exchange tube, the diversity of the heat exchange flow channels of the first heat exchange element can be increased, making the arrangement of the heat exchange flow channels more flexible, which is beneficial to further improve the heat exchange effect of the first heat exchange element and improve the temperature uniformity of the battery.

[0068] In some embodiments, 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.

[0069] In the above technical solution, by arranging at least a part of the first heat exchange section of the first heat exchange tube in the U-shaped area of ​​the second heat exchange tube, the first heat exchange tube and the second heat exchange tube can be arranged around each other. In this way, the winding method of multiple heat exchange tubes can be arranged according to the heat exchange requirements of various parts of the battery assembly, further increasing the heat exchange effect of the first heat exchange element and improving the temperature uniformity of the battery.

[0070] In some embodiments, the second heat exchange tube includes a third heat exchange section and a fourth heat exchange section that are bent and connected, and the third heat exchange section and the fourth heat exchange section are respectively bent to form a U-shaped area, the third heat exchange section is arranged in the U-shaped area of ​​the fourth heat exchange section, and at least a portion 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.

[0071] In the above technical solution, by arranging the above-mentioned at least part of the first heat exchange section of the first heat exchange tube to be arranged in the U-shaped area of ​​the third heat exchange section, the above-mentioned at least part of the first heat exchange section of the first heat exchange tube is also located in the U-shaped area of ​​the fourth heat exchange section. On the premise that the first heat exchange tube and the second heat exchange tube are wound around each other, 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 improve the temperature uniformity of the battery.

[0072] 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 portion and a second bending portion, there are multiple fifth heat exchange portions and they are arranged at intervals along the first direction, each first heat exchange portion extends along the second direction, the second bending portion is arc-shaped and bent and connected between two adjacent fifth heat exchange portions, so that multiple fifth heat exchange portions are connected in sequence, and the second direction is arranged at an angle to the first direction, wherein 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,

[0073] In the above technical solution, by setting 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 be beneficial to achieve temperature control of the internal battery cells, and the setting of the fifth heat exchange section will not affect the mutual winding between the first heat exchange tube and the second heat exchange tube.

[0074] In some embodiments, the first heat exchange element 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.

[0075] In the above technical solution, by setting at least a portion of the third heat exchange tube to be bent in the U-shaped area of ​​the second heat exchange tube, it is convenient to further achieve good temperature control of the internal battery cells, which is beneficial to improve the temperature distribution of the entire battery and facilitate improving the temperature uniformity of the battery.

[0076] In some embodiments, the fixed beam is configured as a first expansion beam and includes: a beam body, which defines a cavity; a reinforcing partition, which is arranged in the cavity and has a plurality of spaced-apart connection portions, the plurality of connection portions including a first connection portion and a second connection portion, the first connection portion and the second connection portion being 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 connection portion and the second connection portion are alternately arranged.

[0077] In the above technical solution, the first expansion beam includes a beam body and a reinforcing partition. The reinforcing partition is arranged in the cavity and divides the cavity of the beam body into multiple chambers, so that the reinforcing partition plays a certain supporting and reinforcing role on the relative sides of the beam body, which is beneficial to improving the structural strength, bearing capacity and structural stability of the first expansion beam, thereby improving the reliability of the use of the first expansion beam.

[0078] In some embodiments, 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 a 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.

[0079] In the above technical solution, the beam body includes a first plate body and a second plate body, and a reinforcing partition is arranged between the first plate body and the second plate body. Not only is the expansion beam connected to the first plate body through the first connecting part and the third connecting part, and connected to the second plate body through the second connecting part and the third connecting part, but the expansion beam also has a simple structure, is easy to assemble, and has good structural stability.

[0080] In some embodiments, the battery also 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 disposed in the cavity of the first expansion beam, a fourth fixing member is disposed 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.

[0081] In the above technical solution, by arranging a pull rope connected to the third fixing member and the pull rope 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 exert a force on the first expansion beam and the second expansion beam to resist the expansion force of the battery cell; and, since the third fixing member and the fourth fixing member are arranged in the cavity of the corresponding expansion beam, even if the connection between at least one of the third fixing member and the fourth fixing member and the corresponding expansion beam fails, the above-mentioned at least one of the third fixing member and the fourth fixing member can also be confined in the cavity of the corresponding expansion beam, which is beneficial to reduce the risk of the above-mentioned 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.

[0082] In some embodiments, 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 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 component.

[0083] In the above technical solution, by setting the first box body including the bottom wall and the surrounding wall as an integral stamped part, the forming of the first box body is facilitated, which is beneficial to reducing the cost of the first box body and making the first box body 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 of the bottom of the first box body, thereby saving multiple connecting parts (such as bolts) in the box body for realizing the sealing of the bottom of the first box body, saving the connection process of the bottom wall and the surrounding wall, and is beneficial to improving the assembly efficiency of the box body.

[0084] In some embodiments, 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, and at least one of the top wall, the bottom wall and the surrounding wall is provided with a first heat exchange element.

[0085] In the above technical solution, by setting a first heat exchange element on at least one of the top wall, the bottom wall and the surrounding wall, the number and arrangement positions of the first heat exchange elements can be flexibly set according to actual needs, which is convenient for realizing diversified design of batteries, so as to better meet actual differentiated needs.

[0086] In some embodiments, the fixed 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 fixed beam.

[0087] In the above technical solution, by arranging the first heat exchange element on the top wall to be connected to the fixed beam, the first heat exchange element can play a certain restraining role on the fixed beam, which is beneficial to improving the bearing capacity of the fixed beam.

[0088] In some embodiments, the battery also includes at least one of a second heat exchange element and a third heat exchange element, at least one of the second heat exchange element and the third heat exchange element is used for heat exchange with the battery cell, the second heat exchange element is attached to the outside of the box, and the third heat exchange element is arranged between two adjacent battery cells.

[0089] In the above technical solution, by setting the battery to include at least one of the second heat exchange element and the third heat exchange element, it is beneficial to improve the temperature control ability of the heat exchange component on the battery cell and improve the thermal management performance of the battery. At the same time, it is convenient to use different heat transfer paths to control the temperature of the battery cell according to the different heat exchange requirements of the battery cell.

[0090] In a second aspect, an embodiment of the present application provides an electrical device, comprising the above-mentioned battery.

[0091] In the above technical solution, by adopting the above battery, the reliability of the electrical device can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0092] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0093] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0094] Figure 2 An exploded view of the structure of a battery provided in some embodiments of the present application;

[0095] Figure 3 A partial schematic diagram of a battery provided for some embodiments of the present application;

[0096] Figure 4 for Figure 3 Another schematic diagram of the battery shown in;

[0097] Figure 5 For along Figure 4 Sectional view along line EE;

[0098] Figure 6 For along Figure 4 Sectional view along line FF;

[0099] Figure 7 For along Figure 4 Sectional view of the mid-GG line;

[0100] Figure 8 For along Figure 4A schematic diagram of the assembly process of the first heat exchanger at the cross-sectional position of the middle DD line;

[0101] Fig. 9 for Figure 8 A partial enlarged view of the assembly process of the first heat exchange component;

[0102] Fig.10 A partial cross-sectional view of a box provided in some embodiments of the present application;

[0103] Fig.11 A partial schematic diagram of a battery provided for some embodiments of the present application;

[0104] Fig.12 for Fig.11 A front view of the carrier shown in ;

[0105] Fig.13 for Fig.12 A top view of the carrier shown in ;

[0106] Fig.14 For along Fig.12 Sectional view along the midline HH;

[0107] Fig.15 for Fig.12 A side view of the carrier shown in ;

[0108] Fig.16 A partial schematic diagram of a battery provided for some embodiments of the present application;

[0109] Fig.17 for Fig.16 An exploded view of the battery shown;

[0110] Fig.18 for Fig.16 A cross-sectional view of a battery shown in ;

[0111] Fig.19 for Fig.18 The enlarged view of the circled section A;

[0112] Fig. 20 A partial schematic diagram of a battery provided for some embodiments of the present application;

[0113] Fig.21 For along Fig. 20 Sectional view along the midline BB;

[0114] Fig. 22 for Fig.21 The enlarged view of the C section circled in the middle;

[0115] Fig.23 A schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0116] Fig.24 A schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0117] Fig.25 A schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0118] Fig.26 A schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0119] Fig. 27 A schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0120] Fig.28 A partial schematic diagram of a battery provided for some embodiments of the present application;

[0121] Fig.29 Schematic diagram of a third heat exchange element and a battery cell provided in some embodiments of the present application.

[0122] Reference numerals:

[0123] Electric device 1000, controller 300, motor 400, battery 200, avoidance space 200a, card hole 200d, battery cell 100, box 101, first cavity 101a, second cavity 101b, second recess 101c, third recess 101d, first box 1011, bottom wall 1011a, surrounding wall 1011b, stop step 1011c, first mounting hole 1011d, second box 1012, first heat exchange element 102, heat exchange part 102a, connecting part 102b, second heat exchange element 103, third heat exchange element 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 portion 1052a, first connecting portion 1052b, second connecting portion 1052c, third connecting portion 1052d, bearing member 106, second mating surface 106a, slot 106b, stopper portion 106c, plate body portion 1061, mating portion 1062, first surface 1062a, second surface 1062b, hook portion 1063, support portion 1064, thermal insulation member 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 channel 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, connecting 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, the second heat exchange part 1221, the third heat exchange part 1222, the fourth heat exchange part 1223, the fifth heat exchange part 1224, the third heat exchange section 123, the seventh heat exchange part 1231, the eighth heat exchange part 1232, the ninth heat exchange part 1233, the fourth heat exchange section 124, the tenth heat exchange part 1241, the eleventh heat exchange part 1242, the twelfth heat exchange part 1243, the fifth heat exchange section 125, the sixth heat exchange part 1251, the second bending part 1252, the sixth heat exchange section 126, the seventh heat exchange section 127, the thirteenth heat exchange part 1271, the third bending part 1272, the collector 2, the first collector 21, and the second collector 22. DETAILED DESCRIPTION

[0124] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0125] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; 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" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0126] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0127] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0128] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0129] The term "plurality" used in the present application refers to more than two, including two.

[0130] In the present application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0131] The battery mentioned in the embodiments of the present application refers to a single physical module including multiple battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may be a battery module or a battery pack. A battery module generally includes multiple battery cells. The battery generally includes a box for encapsulating multiple battery cells or multiple battery modules, and the box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells; of course, the battery may not include a box.

[0132] Exemplarily, a battery cell may generally include a shell, a battery cell assembly and an electrolyte, wherein the shell is used to contain the battery cell assembly and the electrolyte, and the shell is provided with at least one positive electrode column and at least one negative electrode column. The battery cell assembly includes one or more electrode assemblies, and the electrode assembly is formed by stacking or winding a positive electrode sheet, a negative electrode sheet and a separator.

[0133] Among them, the positive electrode sheet can generally 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 not coated with the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer, the positive electrode current collector not coated with the positive electrode active material layer serves as a positive electrode tab sheet, and a plurality of positive electrode tab sheets are stacked together and electrically connected to the positive electrode column. Exemplarily, the plurality of stacked positive electrode tab sheets can be directly welded to the positive electrode column to form an electrical connection; or, the battery cell assembly can also include a positive electrode adapter sheet, the plurality of stacked positive electrode tab sheets are welded to one end of the positive electrode adapter sheet, and the other end of the positive electrode adapter sheet is welded to the positive electrode column, so that the positive electrode tab sheet is electrically connected to the positive electrode column.

[0134] The negative electrode sheet can generally 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 not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer, the negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab sheet, and a plurality of negative electrode tab sheets are stacked together and electrically connected to the negative electrode column. Exemplarily, a plurality of negative electrode tab sheets stacked together can be directly welded to the negative electrode column to form an electrical connection; or, the battery cell assembly can also include a negative electrode adapter sheet, a plurality of negative electrode tab sheets stacked together are welded to one end of the negative electrode adapter sheet, and the other end of the negative electrode adapter sheet is welded to the negative electrode column, so that the negative electrode tab sheet is electrically connected to the negative electrode column. The material of the separator is not limited, for example, it can be polypropylene or polyethylene.

[0135] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable and important role. Among them, batteries, as the core components of new energy vehicles, have high requirements in terms of reliability.

[0136] In the related art, a battery includes a plurality of battery cells, and a heat exchange element is usually used to control the temperature of the battery cells. A heat exchange medium is generally introduced into the heat exchange element. However, there is a risk of leakage of the heat exchange medium at the interface of the heat exchange element. The leaked heat exchange medium is likely to have a certain impact on the battery cells, thereby affecting the performance of the battery.

[0137] Based on the above considerations, in order to improve the reliability of the battery, a battery is proposed, including a box body, a fixed beam, a battery cell 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 and / or the box body forms an escape space connecting the first cavity and the second cavity, the battery cell is arranged in the box body and is located in the first cavity, the first heat exchange component is arranged in the box body and is located between the battery cell and the box body, the first heat exchange component forms at least one heat exchange channel and 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 forms a port of the heat exchange channel, the connecting part passes through the heat exchange part in the escape space and extends to the second cavity, so that the port of the heat exchange channel is located in the second cavity.

[0138] In the above technical solution, an avoidance space is formed in the fixed beam, and the connecting part is arranged in 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, which facilitates the assembly of the first heat exchange element and the fixed beam, and facilitates the connection part of the first heat exchange element to extend to the second cavity without being greatly bent around the fixed beam, which is beneficial to simplifying the structure of the first heat exchange element; at the same time, the setting of the above avoidance space can make the ports of the heat exchange channel all located in the second cavity, that is, the ports of the heat exchange channel and the battery cell are separated by the fixed beam to be located in different cavities respectively, which is beneficial to the box body to provide a suitable layout space for the connection between the first heat exchange element and other components. At the same time, even if the heat exchange medium leaks at the port position of the first heat exchange element, the leaked heat exchange medium is not easy to flow to the battery cell position at the first time, which is beneficial to reduce the influence of the heat exchange medium leakage at the port position of the first heat exchange element on the battery cell, and is beneficial to improve the reliability of the battery.

[0139] The embodiment of the present application provides an electric device using the battery disclosed in the present application as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc., the electric tool may include a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc.

[0140] For the convenience of explanation, the following embodiments take the electric device as a vehicle as an example to introduce the structure of the electric device and the battery of the present application in detail.

[0141] Please refer to Figure 1 , Figure 1 The power consumption device 1000 provided for some embodiments of the present application is a structural schematic diagram of a vehicle. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle is provided with a battery 200, and the battery 200 can be arranged at the bottom, head or tail of the vehicle. The battery 200 can be used to power the vehicle, for example, the battery 200 can be used as an operating power source for the vehicle. The vehicle may also include a controller 300 and a motor 400, and the controller 300 is used to control the battery 200 to power the motor 400, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the present application, the battery 200 can be used not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0142] Please refer to Figure 2 , Figure 2 The battery cell 100 provided in some embodiments of the present application is used for the structural explosion diagram of the battery 200. The battery 200 includes a case 101 and a plurality of battery cells 100, and the battery cells 100 are accommodated in the case 101. Among them, the case 101 is used to provide an assembly space for the battery cells, and the case 101 can adopt a variety of structures. In some embodiments, the case 101 may include a first case 1011 and a second case 1012, and the first case 1011 and the second case 1012 cover each other, and the first case 1011 and the second case 1012 jointly define a receiving cavity for accommodating the battery cells. The second case 1012 may be a hollow structure with one end open, and the first case 1011 may be a plate-like structure, and the first case 1011 covers the open side of the second case 1012, so that the first case 1011 and the second case 1012 jointly define a receiving cavity; or, the first case 1011 and the second case 1012 may also 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 in various shapes, such as a cylinder or a cuboid.

[0143] In the battery 200, multiple battery cells 100 can be connected in series, in parallel or in a mixed connection. A mixed connection means that multiple battery cells 100 are both connected in series and in parallel. Multiple battery cells 100 can be directly connected in series, in parallel or in a mixed connection, and then the whole formed by multiple battery cells 100 is accommodated in the box 101; or, the battery 200 can also be a battery module formed by multiple battery cells 100 connected in series, in parallel or in a mixed connection, and then multiple battery modules are connected in series, in parallel or in a mixed connection to form a whole, and accommodated in the box 101. The battery 200 may also include other structures, for example, the battery 200 may also include a busbar for realizing electrical connection between multiple battery cells 100.

[0144] 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.

[0145] Please refer to Figure 3-Figure 5In the embodiment of the present application, the battery 200 includes a box body 101, a fixing beam 105 and a battery cell 100. The fixing beam 105 is arranged in 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 cell 100 is arranged in the box body 101, and the battery cell 100 is located in the first cavity 101a. It can be seen that the battery cell 100 is arranged on the side of the fixing beam 105 away from the second cavity 101b, so the second cavity 101b does not need to be provided with the battery cell 100, so as to make room for other components. For example, the second cavity 101b can be used to set up the battery 200 management system, high-voltage box, etc.

[0146] Please refer to Figure 3 The battery 200 further includes a first heat exchange member 102, which is disposed in the box body 101 and is located between the battery cell 100 and the box body 101. The first heat exchange member 102 is formed with at least one heat exchange channel 10, and the first heat exchange member 102 includes a heat exchange portion 1d and a connecting 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 cell 100. The connecting portion 1e is formed with a port 11 of the heat exchange channel 10.

[0147] It can be seen that each heat exchange channel 10 has two ports 11, and the connection part 1e corresponds to multiple ports 11, and one of the two ports 11 of each heat exchange channel 10 is used for liquid inlet, and the other is used for liquid outlet. For example, for a single heat exchange channel 10, the heat exchange medium flows into the heat exchange channel 10 from one of the ports 11 of the heat exchange channel 10, exchanges heat with the battery cell 100 when flowing through the channel in the heat exchange part 1d, and realizes temperature control of the battery cell 100. The heat exchange medium after heat exchange is discharged through the other port 11 of the heat exchange channel 10; wherein, the form of the heat exchange medium is not specifically limited, and can be gaseous, liquid, or a gas-liquid mixed state.

[0148] Please refer to Figure 4 and Figure 6 The fixed beam 105 and / or the box body 101 form an escape space 200a, and the escape space 200a connects the first cavity 101a and the second cavity 101b, then the side of the escape space 200a facing the first cavity 101a is open, and the side of the escape space 200a facing the second cavity 101b is open, and the connecting part 1e is arranged from the heat exchange part 1d through the escape space 200a and extends to the second cavity 101b, so that the port 11 of the heat exchange channel 10 is located in the second cavity 101b; it can be seen that the fixed beam 105 can separate the port 11 of the heat exchange channel 10 from all the battery cells 100.

[0149] It is understandable that the avoidance space 200a can be defined by the fixed beam 105 alone, or defined by the box 101 alone, or formed by the fixed beam 105 and the box 101. For example, when the avoidance space 200a is defined by the fixed beam 105 alone, the specific position of the avoidance space 200a can be set according to actual needs, such as the avoidance space 200a is open to the side corresponding to the first heat exchange element 102, and the wall of the box 101 can block the open side of the avoidance space 200a, and the avoidance space 200a and the wall of the box 101 corresponding to the first heat exchange element 102 are completely separated and set; for another example, when the avoidance space 200a is defined by the box 101 alone, the wall of the box 101 where the first heat exchange element 102 is set can be formed with a second recess 101c described later to define the avoidance space 200a, and the fixed beam 105 can be set on the open side of the avoidance space 200a; but it is not limited to this.

[0150] In the above technical solution, the avoidance space 200a is formed in the fixed beam 105, and the connecting portion 1e is arranged from the heat exchange portion 1d through the avoidance space 200a and extends to the second cavity 101b, so that the port 11 of the heat exchange channel 10 is located in the second cavity 101b, which facilitates the assembly of the first heat exchange element 102 and the fixed beam 105, and facilitates the connection portion 1e of the first heat exchange element 102 to extend to the second cavity 101b without being greatly bent around the fixed beam 105, which is conducive to simplifying the structure of the first heat exchange element 102; at the same time, the setting of the avoidance space 200a can make the port 11 of the heat exchange channel 10 1 are both located in the second cavity 101b, that is, the port 11 of the heat exchange flow channel 10 and the battery cell 100 are separated by the fixed beam 105 to be located in different cavities respectively, so that the box body 101 provides a suitable arrangement space for the communication between the first heat exchange element 102 and other components. At the same time, even if the heat exchange medium leaks at the position of the port 11 of the first heat exchange element 102, the leaked heat exchange medium is not easy to flow to the position of the battery cell 100 in the first time, which is conducive to reducing the influence of the heat exchange medium leakage at the position of the port 11 of the first heat exchange element 102 on the battery cell 100, and is convenient to improve the use reliability of the battery 200.

[0151] In addition, in the embodiment of the present application, the first heat exchange element 102 together with any one of the second heat exchange element 103 and the third heat exchange element 104 described below can be configured to be used only for cooling the battery cell 100, or to be used only for heating the battery cell 100, or to be used not only for cooling the battery cell 100 but also for heating the battery cell 100. The two ports 11 of the heat exchange channel 10 are respectively the first port 11a and the second port 11b. When the first port 11a is used for liquid inlet, the second port 11b is used for liquid outlet, or when the second port 11b is used for liquid inlet, 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.

[0152] It is worth noting that in the embodiment of the present application, the connection part 1e passes through the avoidance space 200a from the heat exchange part 1d and extends to the second chamber 101b, which can be understood as: 1. The avoidance space 200a is configured to allow the connection part 1e to extend from the first chamber 101a to the second chamber 101b through the avoidance space 200a; 2. The avoidance space 200a is only used to accommodate and avoid a part of the connection part 1e, and it does not allow the connection part 1e to pass through the avoidance space 200a from the first chamber 101a and extend to the second chamber 101b. For the first solution mentioned above, the requirements for the assembly sequence of the battery 200 are relatively low. For example, the box body 101 and the fixed beam 105 can be assembled first, and then the first heat exchange component 102 can be installed on the box body 101, or the box body 101 and the first heat exchange component 102 can be assembled first, and then the fixed beam 105 can be installed on the box body 101; and for the second solution mentioned above, the box body 101 and the first heat exchange component 102 can be assembled first, and then the fixed beam 105 can be installed on the box body 101.

[0153] In the embodiment of the present application, the cross-sectional shape of the avoidance space 200a is not specifically limited. The cross-sectional shape of the avoidance space 200a is perpendicular to the direction from the first cavity 101a to the second cavity 101b (for example, the cross-sectional shape of the avoidance space 200a is perpendicular to the direction from the first cavity 101a to the second cavity 101b). Figure 3The second direction X2 in the drawing); for example, the fixed beam 105 is formed with a first recess 105a, and the first recess 105a defines at least a portion of the avoidance space 200a. The first heat exchanger 102 is arranged on the wall of the box body 101. The cross-sectional shape of the first recess 105a is a trapezoid, and the trapezoid has a top side, a bottom side and two waist sides connected to the top side and the bottom side. The angle between each waist side and the top side is an obtuse angle. 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. Therefore, during the molding process of the first recess 105a, it is necessary to machine the top side and waist side of the trapezoid on the fixed beam 105, and the waist side and the top side are at an obtuse angle, which facilitates the molding 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 integral stamping part, which facilitates the processing of the first recess 105a.

[0154] In some embodiments, the first cavity 101a may be provided with other components in addition to the battery cell 100. For example, the fixed beam 105 is configured as the first expansion beam B1, the second expansion beam B2 may be provided in the first cavity 101a, and all the battery cells 100 are sandwiched between the first expansion beam B1 and the second expansion beam B2; for another example, the fixed beam 105 is configured as the first expansion beam B1, the second expansion beam B2 and the third expansion beam B3 may 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, the battery cell 100 is provided between the first expansion beam B1 and the third expansion beam B3, and the battery cell 100 is also provided between the second expansion beam B2 and the third expansion beam B3.

[0155] It is worth noting that the fixed beam 105 can be constructed as an expansion beam, or can be constructed as other beam structures in the box body 101 except the expansion beam, such as a partition beam.

[0156] Please refer to Figure 6 and Fig. 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 form an escape space 200a. It can be seen that when the fixed beam 105 has a first recess 105a, the first recess 105a forms at least part of the escape space 200a; when the wall of the box body 101 has a second recess 101c, the second recess 101c forms at least part of the escape space 200a.

[0157] Exemplarily, the first heat exchanger 102 is arranged on the bottom wall 1011a of the box body 101: the bottom of the fixed beam 105 is formed with a first recessed portion 105a which is recessed upward, and the first recessed portion 105a is open on one side facing the bottom wall 1011a of the box body 101; and / or, the bottom wall 1011a of the box body 101 is formed with a second recessed portion 101c which is recessed downward, and the top side of the second recessed portion 101c is open. In some other examples, the first heat exchanger 102 is arranged on the top wall of the box body 101, the first recessed portion 105a is formed on the top of the fixed beam 105 and is recessed downward, and the first recessed portion 105a is open on one side facing the top wall of the box body 101; of course, the first heat exchanger 102 can also be arranged on the surrounding wall 1011b of the box body 101, and the surrounding wall 1011b is arranged around the bottom wall 1011a and connected between the bottom wall 1011a and the top wall of the box body 101.

[0158] In the above technical solution, an avoidance space 200a is constructed by setting the first recess 105a and / or the second recess 101c, so that the avoidance space 200a is set between the box body 101 and the fixed beam 105, and the connecting part 1e passing through the avoidance space 200a can be closer to the wall setting of the first heat exchanger 102 corresponding to the setting of the box body 101, which is beneficial to reduce the distance between the connecting part 1e and the heat exchange part 1d in the normal direction of the above-mentioned wall of the box body 101, and even helps to prevent the connecting part 1e and the heat exchange part 1d from bending at the connection position, which is beneficial to simplify the structure of the first heat exchanger 102 and facilitate processing.

[0159] It can be understood that when the first recess 105a and the second recess 101c are configured to form an escape space 200a, it is convenient to provide a larger space for the setting of the connection part 1e. When the battery 200 is configured to first assemble the box body 101 and the fixed beam 105, and then set the first heat exchanger 102 on the box body 101, the box body 101 and the fixed beam 105 can provide a larger penetration space for the assembly of the connection part 1e, which is convenient for the connection part 1e to quickly align with the escape space 200a between the box body 101 and the beam, which is conducive to improving the assembly convenience of the first connecting member; moreover, the size of at least one of the first recess 105a and the second recess 101c can be set smaller, which is convenient to reduce the weakening effect of the first recess 105a on the fixed beam 105 and / or reduce the difficulty of forming the second recess 101c. In addition, the setting of the second recess 101c will not affect the sealing of the structure of the box body 101 itself.

[0160] It is worth noting that the directions or positional relationships indicated by “top”, “bottom”, “upper”, “lower”, etc. described herein are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present application. For example, in Figure 2 In the illustrated embodiment, the box 101 includes a first box 1011 and a second box 1012, the second box 1012 is disposed on the top of the first box 1011, the bottom wall 1011a of the box 101 can be formed on the first box 1011, and the top wall of the box 101 can be formed on the second box 1012. In actual use, the battery 200 can be placed upright, and the second box 1012 is disposed on the top of the first box 1011, or the battery 200 can be placed inverted, and the second box 1012 is disposed on the bottom of the first box 1011.

[0161] Please refer to Figure 3 and Figure 6 In some embodiments, the avoidance space 200a is configured to allow the connection portion 1e to pass through.

[0162] In the above technical solution, the avoidance space 200a is configured to allow the connection part 1e to pass through, that is, the avoidance space 200a allows the connection part 1e to pass through, then the avoidance space 200a can allow the connection part 1e to extend from the first cavity 101a to the second cavity 101b through the avoidance space 200a, then when assembling the battery 200, you can choose the assembly method of "first assemble the box body 101 and the fixed beam 105, and then install the first heat exchanger 102 on the box body 101". 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 exchanger 102 is installed", which is beneficial to improve the convenience of assembly.

[0163] It can be understood that when the material of the fixed beam 105 itself has a certain degree of corrosion resistance, the assembly order of the box body 101, the fixed beam 105 and the first heat exchanger 102 is less demanding. The box body 101 and the fixed 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 fixed beam 105 can be installed on the box body 101; and when the material of the fixed beam 105 itself has poor corrosion resistance, the box body 101 and the fixed beam 105 can be assembled first, and the two can be electrophoresed together before the first installation component is installed on the box body 101.

[0164] Please refer to Figure 6-Figure 9In 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.

[0165] Exemplarily, the heat exchange portion 1d of the first heat exchange element 102 can be configured as a first part, and a part of the connecting portion 1e of the first heat exchange element 102 can be configured as a second part; or, a part of the connecting portion 1e and the heat exchange portion 1d can be jointly configured as a first part, and the other part of the connecting portion 1e can be configured as a second part.

[0166] In the above technical solution, the parts of the first heat exchanger 102 located on the opposite sides of the fixed beam 105 are connected at an obtuse angle, so that during the assembly process of the first heat exchanger 102, the first part is first aligned with the avoidance space 200a, and the second part is roughly inclined. As the first part is inserted, the inclination angle of the second part gradually decreases until the first part passes through the avoidance space 200a to complete the insertion of the first heat exchanger 102. At this time, the heat exchange part 1d of the first heat exchanger 102 can be attached to the corresponding wall of the box body 101, which facilitates the insertion of the first heat exchanger 102 and is conducive to improving the installation convenience of the first heat exchanger 102; and the above assembly method is particularly suitable for the situation where the heat exchange part 1d occupies a large space on the corresponding wall of the box body 101, such as the heat exchange part 1d is constructed as follows: in the direction from the first cavity 101a to the second cavity 101b (for example Figure 8 In the X2 direction, 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 cavity 101a. At this time, the first heat exchanger 102 cannot be directly arranged on the corresponding wall along the normal direction of the corresponding wall of the box body 101, which can be beneficial to the assembly method in the above scheme, so as to realize the smooth installation of the first heat exchanger 102 and at the same time help to increase the heat exchange area of ​​the heat exchange part 1d.

[0167] Of course, in the above solution, other assembly methods may also be selected when assembling the battery 200 , such as first assembling the box body 101 and the first heat exchange component 102 , and then installing the fixing beam 105 onto the box body 101 .

[0168] In addition, in other embodiments of the present application, the portion of the first heat exchange element 102 located in the first chamber 101a and the portion located in the second chamber 101b may also be connected at a right angle, that is, the angle α is a right angle, as shown in the figure.

[0169] Please refer to Figure 3 , Figure 4 and Figure 6In some embodiments, the battery 200 further includes a current collector 2 , which is connected to the port 11 of the connecting portion 1 e and is located in the second cavity 101 b .

[0170] In the above technical solution, by setting the collector 2 to be connected with the port 11, the heat exchange medium flows to the heat exchange channel 10 through the collector 2, and\or the heat exchange medium after heat exchange in the heat exchange channel 10 flows to the collector 2 through the port 11, so as to realize the circulation of the heat exchange medium; since the collector 2 is located in the second cavity 101b, the connection position between the collector 2 and other components except the first heat exchange element 102 is also located in the second cavity 101b, even if the heat exchange medium leaks at the connection position between the collector 2 and the above-mentioned other components, the leaked heat exchange medium is not easy to flow to the first cavity 101a where the battery cell 100 is located at the first time, which is beneficial to reduce the influence of the heat exchange medium leakage at the collector 2 on the battery cell 100, and is beneficial to improve the reliability of the battery 200.

[0171] Please refer to Figure 6 , Figure 8 and Fig. 9 In some embodiments, the avoidance space 200a is configured to allow the current collector 2 to pass through.

[0172] For example, after the fixing beam 105 is assembled with the box body 101, when the first heat exchange component 102 is connected with the current collector 2 and assembled to the box body 101, the current collector 2 can move from the first cavity 101a to the first cavity 101a through the avoidance space 200a.

[0173] In the above technical solution, by setting the avoidance space 200a to allow the current collector 2 to pass through, the avoidance space 200a can allow the current collector 2 to move from the first cavity 101a to the second cavity 101b through the avoidance space 200a. Then, when assembling the battery 200, you can choose the assembly method of "first assemble the box body 101 and the fixed beam 105, assemble the first heat exchanger 102 and the current collector 2, and then assemble the assembled first heat exchanger 102 and the current collector 2 to the box body 101". 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 exchanger 102 is installed", which is beneficial to take into account both the assembly convenience and protection capability of the battery 200.

[0174] It can be understood that, usually, on a plane perpendicular to the direction from the first cavity 101a to the second cavity 101b, the orthographic projection of the connecting portion 1e is located within the outer contour of the orthographic projection of the current collector 2. 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.

[0175] Optionally, the fixed beam 105 has a first recess 105a, the first recess 105a constructs an escape space 200a, and the first recess 105a is configured to allow the collector 2 to pass through; or, the box body 101 has a second recess 101c, the second recess 101c constructs an escape space 200a, and the second recess 101c is configured to allow the 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 construct an escape space 200a, and the collector 2 can pass through the space formed by the first recess 105a and the second recess 101c.

[0176] Please refer to Figure 3 and Figure 4 In some embodiments, the connection portion 1e has at least two ports 11, and the current collector 2, the connection 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 to different heat exchange channels 10.

[0177] It can be seen that the first heat exchange element 102 may include one or more connecting parts 1 e , and the multiple ports 11 corresponding to a single connecting part 1 e may belong to the same heat exchange channel 10 or to different heat exchange channels 10 .

[0178] Among them, the current collector 2 is connected to the multiple ports 11 of the corresponding connecting part 1e. At this time, the multiple ports 11 corresponding to the current collector 2 can all be used for liquid inlet or all for liquid outlet, and the multiple ports 11 corresponding to the current collector 2 can respectively belong to different heat exchange channels 10; or, the current collector 2 separates the multiple ports 11 of the corresponding connecting part 1e into multiple independent 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. The multiple ports 11 corresponding to the current collector 2 can belong to the same heat exchange channel 10 or different heat exchange channels 10.

[0179] It can be understood that when the current collector 2 separates the above-mentioned multiple ports 11 of the corresponding connecting part 1e into multiple independent flow channels, the current collector 2 defines multiple independent flow channels, and each flow channel can be connected to 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 is connected to all the ports 11 for liquid inlet among the above-mentioned at least two ports 11, and the second flow channel is connected to all the flow channels for liquid outlet among the above-mentioned at least two ports 11; of course, three flow channels can also be defined in the current collector 2, two of which are used to realize liquid inlet of the corresponding port 11, and the remaining one flow channel is used to realize liquid outlet of the corresponding port 11.

[0180] In the above technical solution, by setting the collector 2 and the avoidance space 200a to correspond one to one, and making the collector 2 correspond to at least two ports 11, so that on the premise that the liquid inlet and liquid outlet of the heat exchange channel 10 are realized through the collector 2, the avoidance space 200a can correspond to at least two ports 11, which is beneficial to reduce the number of avoidance spaces 200a, simplify the processing procedures of the fixed beam 105, and facilitate the processing of the fixed beam 105.

[0181] It can be understood that when the current collector 2 corresponds to the avoidance space 200a one-to-one, the number, arrangement spacing, etc. of the current collector 2 and the avoidance space 200a can be matched. On the premise of achieving smooth assembly of the current collector 2, it is beneficial to reduce the sum of the opening dimensions of all the avoidance spaces 200a, thereby reducing the weakening effect of the fixed beam 105 caused by the opening of the avoidance space 200a, and / or reducing the processing complexity of the box body 101 caused by the opening of the avoidance space 200a.

[0182] Please refer to Figure 3 , Figure 4 and Fig.17 In some embodiments, there are multiple heat exchange channels 10, and the two ports 11 of each heat exchange channel 10 are respectively a first port 11a and a second port 11b, wherein the first port 11a is used for liquid inlet and the second port 11b is used for liquid outlet.

[0183] Among them, there are two current collectors 2 and the two current collectors 2 are respectively the first current collector 21 and the second current collector 22. The first ports 11a of all heat exchange channels 10 are connected to the first current collector 21, and the second ports 11b of all heat exchange channels 10 are 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 up multiple separated flow channels in each current collector 2, which is beneficial to simplify the structure of the current collector 2. At the same time, since the two ends of all heat exchange 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.

[0184] Alternatively, there is one current collector 2, which has two separated and independently arranged flow channels, the first ports 11a of all heat exchange flow channels 10 are connected to one of the flow channels, and the second ports 11b of all heat exchange flow channels 10 are connected to the other flow channel. Then, one current collector 2 realizes the medium circulation of all 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 processing steps.

[0185] Of course, in other embodiments, there may be one heat exchange channel 10, and in this case, there may be one or two current collectors 2. The specific configuration is the same as the above solution and will not be described in detail here.

[0186] In the above technical solution, no matter there are one or two current collectors 2, it is convenient to use a smaller number of current collectors 2 to realize the circulation of the medium in all heat exchange channels 10, which can reduce the number of avoidance spaces 200a, which is conducive to reducing processing difficulty and saving processing steps.

[0187] Please refer to Figure 5 , Figure 6 and Fig.11 In some embodiments, the fixed beam 105 is configured as a 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 withstand the expansion force of the battery cell 100; the battery 200 also includes a carrier 106, the carrier 106 is arranged in the avoidance space 200a, and the carrier 106 has a second mating surface 106a that abuts against the battery cell 100, the first mating surface 105b is flush with the second mating surface 106a, for example, the first mating surface 105b and the second mating surface 106a can be located in the same plane; the carrier 106 has a groove 106b for avoiding the connecting portion 1e, and the groove 106b runs through the outer peripheral side of the carrier 106.

[0188] 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 can be indirectly stopped with 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 can be indirectly stopped with the battery cell 100. The slot 106b on the carrier 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 formed at both ends of the heat exchange tube 1. The slot 106b is used to avoid one or more ends; when the slot 106b is used to avoid multiple ends, the multiple ends can belong to the same heat exchange tube 1 or different heat exchange tubes 1.

[0189] 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.

[0190] 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.

[0191] Please refer to Figure 6 and Fig.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.

[0192] 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 3The second direction X2) in the direction X2 of the support 106 can be reliably limited, and the stopper 106c can resist the expansion force exerted by the battery cell 100 on the support 106, which is beneficial to improving the carrying capacity of the support 106, so that the support 106 can stably withstand the expansion force of the battery cell 100, and reduce the probability of the support 106 moving toward the second cavity 101b under the action of the battery cell 100; and if at least one of the fixed beam 105 and the box body 101 is connected and fixed to the support 106 by other means, such as at least one of the fixed beam 105 and the box body 101 is bonded to the support 106, the above scheme is beneficial to reduce the force borne by other connection methods between at least one of the fixed beam 105 and the box body 101 and the support 106, and is beneficial to improving the setting reliability and stability of the support 106.

[0193] Please refer to Figure 6 and Fig.10 In some embodiments, a stopper 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, the end of the portion of the fixed beam 105 corresponding to the avoidance space 200a facing the first cavity 101a is formed as the stopper 106c. For example, when the fixed beam 105 has a first recess 105a, the end of the first recess 105a facing the first cavity 101a is formed with the stopper 106c; and / or, when the box body 101 has a second recess 101c, the portion of the fixed beam 105 corresponding to the second recess 101c is formed with the stopper 106c at the end facing the first cavity 101a; and / or, the wall of the box body 101 where the first heat exchanger 102 is arranged is formed with a stopper step 1011c protruding toward the fixed beam 105, and the stopper step 1011c is formed as the stopper 106c.

[0194] In the above technical solution, a stopper 106c is formed at the position of the avoidance space 200a on one side of the fixed beam 105 facing the first cavity 101a, so that the stopper 106c is defined by the structure of the fixed beam 105 itself to limit the position of the carrier 106, and no separate setting is required, which is conducive to simplifying the structure of the fixed beam 105. At the same time, the stopper 106c is located on the side of the fixed beam 105 facing the first cavity 101a, so that it is convenient to cooperate with the carrier 106 "along the direction from the first cavity 101a to the second cavity 101b in the avoidance space 200a". The installation method is matched, so that the stop portion 106c will not interfere with the assembly of the supporting member 106, which is beneficial to improving the convenience of assembly; by arranging the wall of the box body 101, a stop step 1011c protruding toward the fixed beam 105 is formed, and the stop step 1011c is formed as the stop portion 106c, which is convenient for utilizing the structure of the box body 101 itself to limit the stop portion 106c to achieve the limitation of the supporting member 106, without the need for a separate setting, which is beneficial to simplifying the structure of the box body 101. At the same time, the setting of the stop step 1011c will not affect the sealing of the structure of the box body 101 itself.

[0195] Exemplarily, the first recess 105a of the fixed beam 105 constructs at least a portion of the avoidance space 200a, and one end of the first recess 105a facing the first cavity 101a is formed as a stop portion 106c, which is beneficial to increase the matching area between the fixed beam 105 and the support member 106, and facilitates to further improve the setting reliability and bearing capacity of the support member 106; and / or, a recessed second recess 101c is formed on the wall of the box body 101 where the first heat exchanger 102 is set, and a stop step 1011c is formed on the groove wall of the second recess 101c.

[0196] Please refer to Figure 6 In some embodiments, in the cross section of the fixed beam 105, the stopper 106c on the fixed beam 105 is formed as an arc structure, and the cross section of the fixed beam 105 is parallel to the length direction of the fixed beam 105 (for example Figure 3 The first direction X1 in the figure).

[0197] In the above technical solution, the stopper 106c on the fixed beam 105 is formed into an arc structure on the cross section of the fixed beam 105, so that under the premise that the stopper 106c can limit the movement of the carrier 106, the part of the carrier 106 that cooperates with the stopper 106c can be avoided to a certain extent. At the same time, combined with the fact that the stopper 106c is located on the side of the fixed beam 105 facing the first cavity 101a, it is convenient to improve the bearing 106 due to the cooperation with the stopper 106c, which is easy to protrude from the first matching surface 105b toward the first cavity 101a, so as to facilitate the flush setting of the second matching surface 106a and the first matching surface 105b. In addition, when the part of the fixed beam 105 corresponding to the stopper 106c is an integrally formed bent plate, the stopper 106c can be located at the bending position of the plate, so that the stopper 106c can be directly formed in the process of forming the bent plate, which is conducive to saving the processing steps of the fixed beam 105, reducing the processing difficulty, and improving production efficiency.

[0198] Please refer to Figure 6 and Figure 7 In some embodiments, the carrier 106 includes a plate body 1061 and a matching portion 1062. A surface on one side of the thickness of the plate body 1061 is formed as a second matching surface 106a. The second matching surface 106a is located on the side of the plate body 1061 facing the first cavity 101a, and the groove 106b runs through both sides of the thickness of the plate body 1061. The matching portion 1062 is formed at the outer edge of the plate body 1061, and the matching portion 1062 is stopped and matched with the fixed beam 105 to limit the movement of the carrier 106 along the direction from the first cavity 101a to the second cavity 101b, for example, the matching portion 1062 is stopped and matched with the stop portion 106c on the fixed beam 105.

[0199] In the above technical solution, by setting the carrier 106 to include the plate body 1061 and the matching portion 1062, the plate body 1061 can provide a second matching surface 106a with a larger area and a relatively flat surface, thereby improving the shielding ability of the carrier 106 to the avoidance space 200a, and the matching portion 1062 can realize the limit of the carrier 106, and realize the reliable installation of the carrier 106, so that the carrier 106 has a certain ability to withstand the expansion force of the battery cell 100, and the carrier 106 has a simple structure and is easy to implement; In addition, since the mating portion 1062 is in abutment with the fixed beam 105, if the fixed beam 105 is deformed to a certain extent under the action of the battery cell 100, causing the first mating surface 105b to deviate from the original position and / or original posture, it is easy for the mating portion 1062 to adapt to the deformation of the fixed beam 105 and the second mating surface 106a of the carrier 106 to adapt and adjust with the change of the first mating surface 105b, which to a certain extent makes it easy for the second mating surface 106a to always be flush with the first mating surface 105b or with a small misalignment.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] Please refer to Figure 7 , Fig.14 and Fig.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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] Please refer to Figure 7 , Fig.14 and Fig.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 .

[0210] 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 .

[0211] In the above technical scheme, by setting the support portion 1064, it is convenient to strengthen the plate body 1061 and improve the structural strength of the carrier 106, and the support portion 1064 will not affect the stop fit between the plate body 1061 and the battery cell 100; and the stop fit between the support portion 1064 and the box body 101 is convenient for dispersing the force applied by the battery cell 100 to the carrier 106 to the box body 101 through the support portion 1064, which is beneficial to further improve the installation reliability and bearing capacity of the carrier 106, and the carrier 106 is respectively matched with the fixed beam 105 and the box body 101 through the matching portion 1062 and the support portion 1064, so that the entire plate body 1061 can be supported and limited in a more balanced manner. At the same time, since the support portion 1064 avoids the groove 106b, the setting of the support portion 1064 will not interfere with the connecting portion 1e, so that the convenient assembly of the carrier 106 is realized.

[0212] Optionally, the support portion 1064 may be configured such that: the support portion 1064 and the housing 101 are abutted against each other in the direction from the first cavity 101a to the second cavity 101b, and / or the support portion 1064 and the housing 101 are abutted against each other in the thickness direction of the first heat exchange member 102 (for example, Figure 7 The third direction X3) is the normal direction of the wall of the box 101 where the first heat exchange element 102 is arranged; for example, combined with Figure 7 and 10 The bottom wall 1011a of the box body 101 is provided with a first heat exchange member 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 sequentially arranged along the third direction X3, and the support portion 1064 can be abutted 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.

[0213] Exemplarily, there are multiple support portions 1064, and each slot 106b is located in the length direction of the fixed beam 105 (for example Figure 1 At least one supporting portion 1064 is respectively provided on both sides in the first direction X1).

[0214] Please refer to Figure 7 , Fig.11 , Fig.14 and Fig.15 In some embodiments, the width of the support portion 1064 in the thickness direction of the plate body 1061 increases from the matching portion 1062 toward the first heat exchanger 102, and the width of the support portion 1064 at one end facing the wall of the box body 101 where the first heat exchanger 102 is arranged is the largest, and the width of the support portion 1064 at one end facing the matching portion 1062 is the smallest.

[0215] Exemplarily, the first heat exchanger 102 is arranged between the bottom wall 1011a of the box body 101 and the battery cell 100, the fixing beam 105 is arranged on the upper side of the bottom wall 1011a, and the width of the support portion 1064 in the thickness direction of the plate body 1061 increases from top to bottom, for example, the support portion 1064 is roughly formed into a triangular plate structure.

[0216] In the above technical solution, by setting the width of the support part 1064 in the direction of the plate thickness to increase from the matching part 1062 toward the first heat exchanger 102, it is convenient to use a smaller amount of material to increase the stop-fit ​​area between the support part 1064 and the box body 101, thereby improving the matching reliability of the support part 1064 and the box body 101, and achieving a balance between cost and load-bearing reliability.

[0217] Exemplarily, when the carrier 106 includes a plate body portion 1061, a matching portion 1062, a hook portion 1063 and a supporting portion 1064, the matching 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 supporting portion 1064 can be located on opposite sides of the plate body portion 1061. Then, while achieving the upper limit position 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 against the battery cell 100.

[0218] In some embodiments, the bearing member 106 is disposed between the first heat exchange member 102 and the fixed beam 105, so that the first heat exchange member 102 and the fixed beam 105 are separated by the bearing member 106, and at this time, the side of the slot 106b facing the wall of the box body 101 where the first heat exchange member 102 is disposed is open. The thermal conductivity of the bearing member 106 is lower than the thermal conductivity of the fixed beam 105; and / or the bearing member 106 is spaced apart from the first heat exchange member 102.

[0219] Exemplarily, the first heat exchanger 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, the supporting member 106 is arranged in the avoidance space 200a, the lower side of the groove 106b is open, and the connecting part 1e is passed through the groove 106b, then the supporting member 106 can separate the connecting part 1e from the fixed beam 105.

[0220] In the above technical solution, the supporting member 106 is arranged between the first heat exchange member 102 and the fixed beam 105, and at the same time, the thermal conductivity of the supporting member 106 is lower than the thermal conductivity of the fixed beam 105, and / or the supporting member 106 and the first heat exchange member 102 are arranged at intervals, which is beneficial to increase the thermal resistance between the first heat exchange member 102 and the fixed beam 105, and reduce the heat exchange between the expansion beam and the first heat exchange member 102, which is beneficial to increase the proportion of heat or cold transferred from the first heat exchange member 102 to the battery cell 100 to a certain extent, and improve the thermal management performance; in addition, when the supporting member 106 and the first heat exchange member 102 are arranged at intervals, the risk of interference between the supporting member 106 and the first heat exchange member 102 can be reduced when the supporting member 106 is assembled, thereby improving the installation convenience of the supporting member 106.

[0221] In some embodiments, the strength of the material of the support member 106 is at least 0.8 times the strength of the material of the fixed beam 105. For example, the strength of the material of the support member 106-106 is 0.8 times, 0.85 times, 0.9 times, 1 times, etc., the strength of the material of the fixed beam 105-105.

[0222] 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.

[0223] In the above technical solution, by setting the strength of the material of the carrier 106 to be at least 0.8 times the strength of the material of the fixed beam 105 , the carrier 106 itself has a good bearing capacity, so that the carrier 106 can reliably and stably withstand the expansion force of the battery cell 100 .

[0224] Please refer to Figure 6 In some embodiments, the first heat exchange element 102 is disposed on the bottom wall 1011a of the box body 101, and one end of the second mating surface 106a facing the first heat exchange element 102 is flush with one end of the first heat exchange element 102 corresponding to the direction of the battery cell 100, or, one end of the second mating surface 106a facing the first heat exchange element 102 is disposed adjacent to the first heat exchange element 102 compared to one end of the first heat exchange element 102 corresponding to the direction of the battery cell 100.

[0225] It can be seen that when the first heat exchange element 102 is arranged at the lower side of the battery cell 100 , the lower end of the second mating surface 106a is arranged 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 .

[0226] In the above technical solution, by setting one end of the second mating surface 106a facing the first heat exchanger 102 to be flush with one end of the battery cell 100 facing the corresponding first heat exchanger 102, or, the end of the second mating surface 106a facing the first heat exchanger 102 is arranged adjacent to the first heat exchanger 102 compared to the end of the battery cell 100 facing the corresponding first heat exchanger 102, it is convenient to support the entire surface of the battery cell 100 facing the fixed beam 105, so as to improve the uniformity of the force applied to the battery cell 100 when it expands and deforms, improve the problems of lithium deposition, liquid leakage, etc. caused by uneven force, thereby improving the reliability of the battery 200.

[0227] Please refer to Fig.16 and Fig.17 In some embodiments, the fixed beam 105 is configured as a first expansion beam B1, and the fixed beam 105 is spaced apart from the first heat exchange member 102, so that the first heat exchange member 102 and the fixed beam 105 are thermally insulated. It can be seen that the fixed beam 105 is spaced apart from the heat exchange portion 1d, and the surface of the fixed beam 105 facing the first cavity 101a is spaced apart from the heat exchange portion 1d, and the fixed beam 105 is spaced apart from the connecting portion 1e, and the wall surface of the avoidance space 200a is spaced apart from the connecting portion 1e.

[0228] Normally, when there are multiple battery cells 100, the peripheral battery cells 100 are arranged to surround the internal battery cells 100. The heat exchange area of ​​the peripheral battery cells 100 is usually larger than the heat exchange area of ​​the internal battery cells 100, so that there is a certain difference in temperature between the peripheral battery cells 100 and the internal battery cells 100; in the related art, the heat exchange component used for the battery cells 100 is not insulated from the expansion beam, so that a certain degree of heat exchange can be carried out between the above-mentioned heat exchange component and the expansion beam. Then, the temperature of the expansion beam is greatly affected by the heat exchange component, which will make the temperature of the expansion beam lower than the peripheral battery cell 100 when the heat exchange component cools the battery cell 100, and the temperature of the expansion beam higher than the peripheral battery cell 100 when the heat exchange component heats the battery cell 100. At this time, the temperature difference between the peripheral battery cell 100 and the internal battery cell 100 will be further aggravated.

[0229] To this end, in the above technical solution, by arranging the first heat exchange component 102 and the fixed beam 105 to be thermally insulated, the thermal resistance between the first heat exchange component 102 and the fixed beam 105 is improved, which is beneficial to reducing the heat or cold transferred from the first heat exchange component 102 to the fixed beam 105, which is beneficial to reducing the temperature difference between the fixed beam 105 and the peripheral battery cell 100 abutting against it, and is convenient to improve the consistency of the heat exchange environment between the peripheral battery cell 100 and the internal battery cell 100, thereby helping to reduce the temperature difference between the peripheral battery cell 100 and the internal battery cell 100, and improving the reliability of the battery 200.

[0230] Please combine Fig.19 and Fig. 22 In some embodiments, the wall of the box body 101 is formed with a second recess 101c, the second recess 101c forms at least part of the avoidance space 200a, and the first heat exchange member 102 is arranged in the second recess 101c. The fixed beam 105 is in contact with the wall of the box body 101 except the second recess 101c; or, the fixed beam 105 is spaced apart from the wall of the box body 101 except the second recess 101c.

[0231] In the above technical solution, by setting the fixed beam 105 to fit with the wall of the box body 101 except the second recessed portion 101c, for the fixed beam 105 and the above-mentioned wall of the box body 101, the fixed beam 105 is separated from the wall of the box body 101 at the position where the first heat exchanger 102 is penetrated, that is, the fixed beam 105 is separated from the second recessed portion 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, and the fixed beam 105 fits with the wall of the box body 101 at the position where the first heat exchanger 102 is not penetrated, that is, the fixed beam 105 is 05 is zero contact with the wall of the box body 101, which is convenient for increasing the matching area of ​​the fixed beam 105 and the box body 101, which is beneficial to improving the installation reliability of the fixed beam 105; by arranging the fixed beam 105 and the wall of the box body 101 except the second recess 101c to be spaced apart, it is beneficial to further increase the interval between the entire fixed beam 105 and the first heat exchanger 102, which is convenient for improving 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 facilitating improving the energy utilization rate of the first heat exchanger 102.

[0232] Please refer to Figure 17-Figure 19 In some embodiments, the battery 200 further includes a heat insulating member 107, the heat insulating member 107 includes a first heat insulating portion 1071, and the first heat insulating portion 1071 is disposed between the wall surface of the fixed beam 105 corresponding to the avoidance space 200a and the connecting portion 1e to fill at least a portion of the gap between the wall surface of the fixed beam 105 corresponding to the avoidance space 200a and the connecting portion 1e.

[0233] In the above technical solution, by arranging the first heat insulation part 1071 between the wall of the expansion beam corresponding to the avoidance channel and the first heat exchange component 102, the first heat insulation part 1071 corresponds to the second recess 101c, so as to further increase the thermal resistance between the fixed beam 105 and the first heat exchange component 102 through the heat insulation component 107.

[0234] Please refer to Fig.17 and Fig.19In some embodiments, the heat insulating member 107 further includes a second heat insulating portion 1072 , and the second heat insulating portion 1072 is disposed between a portion of the wall of the box body 101 excluding the second recess 101 c and the fixing beam 105 .

[0235] It is understandable that the second recess 101c can be used to accommodate the connecting portion 1e of the first heat exchange member 102. Exemplarily, the box body 101 is formed with a plurality of second recesses 101c arranged at intervals at positions corresponding to the avoidance space 200a, each second recess 101c accommodates one end of the heat exchange tube 1, and the first heat insulation part 1071 and the second heat insulation part 1072 are respectively multiple, and the multiple first heat insulation parts 1071 and the multiple second heat insulation parts 1072 are alternately arranged one by one along the length direction of the fixed beam 105.

[0236] In the above scheme, by arranging the second heat insulation part 1072 between the wall of the box body 101 except the second recessed part 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 conveniently realize the reliable installation of the heat insulation member 107 by fixing the fixed beam 105 and the box body 101, so that the heat insulation member 107 can 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 recessed part 101c and improve the molding convenience of the second recessed part 101c.

[0237] Please refer to Fig.19 In some embodiments, a first fixing member 1081 is further provided on the fixed beam 105, and at least a portion of the first fixing member 1081 is located inside the fixed beam 105; the battery 200 also includes a second fixing member 1082, and the second fixing member 1082 is passed through the box body 101, the second heat insulation part 1072 and the fixed beam 105, and the second fixing member 1082 is connected to the first fixing member 1081.

[0238] In the above technical solution, at least part of the first fixing member 1081 is arranged to be located inside the fixed beam 105, and the second fixing member 1082 is arranged through the box body 101, the second heat insulation part 1072 and the fixed beam 105 and connected to the first fixing member 1081, so that the box body 101, the heat insulation member 107 and the fixed beam 105 are fixed by a simple fixing method, and the heat insulation member 107 is reliably installed; at the same time, the second fixing member 1082 can be installed in the direction from the heat insulation member 107 to the fixed beam 105, so that the second fixing member 1082 has sufficient operating space during the assembly process, thereby improving the convenience of assembly. In addition, the second fixing member 1082 is arranged through the second heat insulation part 1072, so that the second fixing member 1082 is arranged to be separated from the first heat exchange member 102, so that the arrangement of the second fixing member 1082 will not affect the first heat exchange member 102.

[0239] Exemplarily, the first fixing member 1081 is a rivet nut, 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 part 1072 is formed with a second mounting hole, and the fixed beam 105 is formed with a third mounting hole. The head of the first fixing member 1081 is engaged in the second mounting hole, and the first fixing member 1081 is inserted into the third mounting hole so that part of the first fixing member 1081 extends into the fixed beam 105. The second fixing member 1082 is inserted into the first mounting hole and is threadedly engaged with the first fixing member 1081 or even part of the fixed beam 105, so that the above-mentioned part of the first fixing member 1081 is deformed to be riveted to the fixed beam 105, and 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-mentioned arrangement can achieve the sealing of the opening position of the box body 101 by corresponding sealing means, including but not limited to setting a gasket 1083 between the head of the second fixing member 1082 and the box body 101.

[0240] It can be understood that the above-mentioned embodiments of the thermal insulation setting of the first expansion beam B1 in the present application are applicable to other expansion beams of the battery 200. For example, the battery 200 also includes a second expansion beam B2, and the second expansion beam B2 is arranged in the first cavity 101a. All battery cells 100 are sandwiched between the first expansion beam B1 and the second expansion beam B2. In the direction from the first cavity 101a to the second cavity 101b, the first heat exchange element 102 and the second expansion beam B2 are spaced apart to achieve the thermal insulation setting of the first heat exchange element 102 and the second expansion beam B2, that is, the entire first heat exchange element 102 is spaced apart on the side of the second expansion beam B2 facing the second cavity 101b; for another example, the battery 200 also includes a second expansion beam B2 and a third expansion beam B3, and the second expansion beam B2 and the third expansion beam B3 are both arranged 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. A battery cell 100 is provided between the three expansion beams B3, and a battery cell 100 is also provided between the second expansion beam B2 and the third expansion beam B3. Then, a portion of the first heat exchange element 102 is provided on the opposite sides of the third expansion beam B3, respectively. At this time, an avoidance channel can be formed between the third expansion beam B3 and the box body 101, and the avoidance channel connects the above-mentioned opposite sides of the third expansion beam B3. For example, the box body 101 forms a third recess 101d, and / or the third expansion beam B3 forms a fourth recess, and the third recess 101d and / or the fourth recess construct an avoidance channel, and the first heat exchange element 102 is penetrated through the avoidance channel, and the portion of the first heat exchange element 102 penetrated through the avoidance channel is spaced apart from the third expansion beam B3, so that the first heat exchange element 102 and the third expansion beam B3 are thermally insulated.

[0241] 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, the wall of the box body 101 is formed with a third recess 101d, the third recess 101d constructs at least part of the avoidance channel, and the part of the first heat exchanger 102 that penetrates the avoidance channel is arranged in the third recess 101d. The third expansion beam B3 is in contact with the wall of the box body 101 except the third recess 101d; or, the third expansion beam B3 is spaced apart from the wall of the box body 101 except the third recess 101d.

[0242] Please refer to Fig.19 In some embodiments, the first heat exchange element 102 includes at least one heat exchange tube 1, a heat exchange channel 10 is defined in the heat exchange tube 1, and the heat exchange tube 1 is a flat tube or a harmonica tube. 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.

[0243] In the above technical solution, by setting the heat exchange tube 1 as a flat tube or a harmonica tube, it is beneficial to save the space occupied by the heat exchange tube 1, and at the same time, it is convenient to use the thick side of the heat exchange tube 1 to exchange heat with the battery cell 100, so as to achieve the balance between the volume 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 0.7mm. In the related art, a water-cooled plate structure is adopted, and the water-cooled plate usually includes two stacked plates, which are welded and fixed and define a flow channel. For this reason, the thickness of the water-cooled plate is usually thick, which can reach more than 2.4mm. It can be seen that the above-mentioned setting of the present application can reduce the cost of the first heat exchange element 102, and at the same time save the space occupied by the first heat exchange element 102, so that when the first heat exchange element 102 is arranged in the box 101, it can also take into account the improvement of the energy density of the battery 200.

[0244] In the embodiment of the present application, the harmonica 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 the two ends of each flow channel are respectively connected to the liquid inlet and the liquid outlet 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 columns along the width direction of the flat tube and the thickness direction of the flat tube.

[0245] It can be understood that when the heat exchange tube 1 is a flat tube or a harmonica tube, if the heat exchange tube 1 is passed through the avoidance space 200a between the fixed beam 105 and the box body 101, the above-mentioned 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 difficulty of forming the avoidance space 200a, and / or reducing the weakening of the corresponding structure.

[0246] Of course, in other embodiments, the heat exchange tube 1 may also be a tube of other shapes such as a round tube.

[0247] In some embodiments, the first heat exchange element 102 includes a plurality of heat exchange tubes 1, and the plurality of heat exchange tubes 1 are arranged at intervals along the first direction, or the plurality of heat exchange tubes 1 are arranged around each other, and the plurality of heat exchange tubes 1 can be arranged in parallel.

[0248] Please refer to Fig.23 , Fig.25 and Fig. 27 In some embodiments, the first heat exchange element 102 includes at least one heat exchange tube 1, the heat exchange tube 1 defines a heat exchange channel 10, and the two ports of the heat exchange channel 10 are respectively located at the two ends of the length of the heat exchange tube 1, and 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 exchange element 102 is configured as a first heat exchange tube 1a. Among them, the first heat exchange tube 1a includes a first heat exchange section 121 and a second heat exchange section 122, and the second heat exchange section 122 is bent to form a U-shaped area 120, the first heat exchange section 121 is bent and arranged in the U-shaped area 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 the heat exchange portion 1d.

[0249] Specifically, the battery 200 may include a plurality of battery cells 100 , and the first heat exchange tube 1 a is used to exchange heat 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, thereby achieving reliable operation of the battery 200 .

[0250] Among them, the above-mentioned “the second heat exchange section 122 is bent to form a U-shaped area 120, and the first heat exchange section 121 is bent and arranged in the U-shaped area 120” is intended to explain that the second heat exchange section 122 is arranged at the circumferential periphery of the first heat exchange section 121, and can be arranged on at least three circumferential sides 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.

[0251] The second heat exchange section 122 is bent to form a U-shaped area 120 , that is, in the direction from one end of the second heat exchange section 122 toward the other end, at least a portion of the second heat exchange section 122 extends along the U-shaped line to form a U-shaped area 120 .

[0252] The first heat exchange section 121 is bent and disposed in the U-shaped area 120 , that is, the first heat exchange section 121 is arranged in a space enclosed by the second heat exchange section 122 , and the first heat exchange section 121 extends along a non-straight line on the inner side of the second heat exchange section 122 , and has at least one bending position.

[0253] It should be noted that, in this embodiment, only the first heat exchange section 121 is limited to be bent and arranged in the U-shaped area 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 be along the length direction of the battery cell 100 (that is, Figure 3 The battery cell 100 extends in the first direction X1 and extends to a certain length in the width direction (i.e., the width direction X2 of the battery cell 100). Figure 3 Alternatively, the first heat exchange section 121 may extend along the width direction of the battery cell 100, and bend toward the length direction of the battery cell 100 after extending to a certain length, and then continue to extend along the width direction of the battery cell 100 and bend along the length direction.

[0254] The first heat exchange section 121 and the second heat exchange section 122 are connected in a bent manner, that is, 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 between the first heat exchange section 121 and the second heat exchange section 122 is a bent non-linear structure. For example, the connection position between the first heat exchange section 121 and the second heat exchange section 122 can be bent into an arc segment.

[0255] Exemplarily, a port of the heat exchange channel 10 may be formed at one end of the first heat exchange section 121 away from the second heat exchange section 122, and another port of the heat exchange channel 10 may be formed at one end of the second heat exchange section 122 away from the first heat exchange section 121, so that when the first heat exchange tube 1a is exchanging heat, the heat exchange medium may flow from the first heat exchange section 121 to the second heat exchange section 122, or from the second heat exchange section 122 to the first heat exchange section 121.

[0256] It is understandable 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 for the battery cell 100, the heat of the battery cell 100 is gradually transferred to the heat exchange medium, so that the temperature of the heat exchange medium gradually increases during the process of flowing along the first heat exchange tube 1a, and the temperature difference between the heat exchange medium and the battery cell 100 gradually decreases, and the heat exchange efficiency gradually decreases; when the first heat exchange tube 1a heats and heats up the battery cell 100, the heat in the heat exchange medium is gradually transferred to the battery cell 100, so that the temperature of the heat exchange medium gradually decreases during the process of flowing along the first heat exchange tube 1a, and the temperature difference between the heat exchange medium and the battery cell 100 gradually decreases, and the heat exchange efficiency gradually decreases.

[0257] In this embodiment, when the first heat exchange tube 1a dissipates heat and cools the 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, or 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 (that is, the internal battery cells 100 on the inner side of the 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 internal battery cells 100, 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 naturally toward the external environment, 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 roughly the same, and then the temperatures of the battery cells 100 at the peripheral position and the battery cells 100 at the middle position after cooling and heat dissipation are relatively consistent, so that the temperature distribution in the battery 200 is more uniform.

[0258] When the first heat exchange tube 1a heats up the temperature of multiple battery cells 100, the heat exchange medium may also flow from the first heat exchange section 121 to the second heat exchange section 122, but the heat exchange medium may 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 may be heated first, and then the heat exchange medium may cool the battery cells 100 at the middle position. Since the battery cells 100 at the periphery 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 higher temperature heat exchange medium may increase the temperature of the battery cells 100 at the periphery while compensating for the loss of heat from the battery cells 100 to the external environment. The heat generated by the battery cell 100 itself can meet its heating needs. The battery cell 100 in the middle position has a small contact area with the external environment and a small 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 cell 100 itself to meet its heating needs. As a result, the heating effects obtained by the peripheral battery cells 100 and the battery cells 100 in the middle position of the battery assembly can be basically the same, and the temperatures of the peripheral battery cells 100 and the battery cells 100 in the middle position after heating are relatively consistent, making the temperature distribution in the battery 200 more uniform.

[0259] In the above-mentioned embodiment, the second heat exchange section 122 is bent to form a U-shaped area 120, and the first heat exchange section 121 is bent and arranged in the U-shaped area 120. When the first heat exchange tube 1a exchanges heat with multiple battery cells 100, the U-shaped area 120 formed by the outer second heat exchange section 122 can be opposite to the outer battery cells 100, and the first heat exchange section 121 in the U-shaped area 120 can be opposite to the internal battery cells 100, so that the first heat exchange tube 1a can make up for the internal and external temperature difference caused by the heat exchange between the outer battery cells 100 and the environment, so that the heat exchange effect of the outer battery cells 100 and the internal battery cells 100 tend to be consistent, thereby improving the temperature uniformity of the battery 200, thereby improving the service life of the battery 200 to a certain extent.

[0260] Optionally, the second heat exchange section 122 can be located at the outermost side of the first heat exchange tube 1a in the circumferential direction, that is, 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 on the periphery, which is beneficial to improve the temperature difference between the peripheral battery cells 100 and the internal battery cells 100 caused by heat exchange with the environment, thereby improving the temperature uniformity of the battery cells 100 on the periphery of the battery 200.

[0261] Optionally, the first heat exchange section 121 and the second heat exchange section 122 are bent in the same plane, so that the first heat exchange tube 1a can exchange heat for multiple battery cells 100 in the same plane. Therefore, 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 the space occupied by the first heat exchange tube 1a can be reduced, thereby improving the volume energy density of the battery 200.

[0262] Alternatively, if Fig.24 As shown, a plurality of heat exchange tubes 1 are arranged at intervals along the first direction, and the two heat exchange tubes 1 at both ends of the first direction are both the first heat exchange channels 10 of the first heat exchange tube 1; and the two first heat exchange channels 10 are arranged symmetrically about the center line L extending along 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 uniformity of the temperature inside and outside the battery assembly. Therefore, forming the two heat exchange tubes 1 at both ends of the first direction into the first heat exchange tube 1a can make the battery cells 100 at both ends of the battery assembly in the first direction have better temperature uniformity performance, and achieve the uniform temperature of the battery assembly as a whole. Therefore, by setting two symmetrically arranged first heat exchange tubes 1, it is possible to achieve liquid inflow on both sides at the same time, increase the liquid inflow flow rate, shorten the length of a single heat exchange channel, reduce the pressure drop in a single heat exchange channel, and thus improve the heat exchange efficiency.

[0263] Furthermore, the medium flow directions and the inlets and outlets of the two heat exchange tubes 1 at both ends of the first direction are symmetrically arranged, so that the two first heat exchange tubes 1a can synchronously exchange heat at both ends of the battery assembly in the first direction, achieving a better temperature equalization effect.

[0264] Of course, in other embodiments, the plurality of heat exchange tubes 1 may be asymmetric about the center line of the first heat exchange element 102 along the second direction.

[0265] Please refer to Fig.23 In some embodiments, the first heat exchange section 121 may include a first heat exchange portion 1211 and a first bending portion 1212, a plurality of first heat exchange portions 1211 are arranged at intervals along the first direction, each first heat exchange portion 1211 extends along the second direction, and the first bending portion 1212 is bent and connected between two adjacent first heat exchange portions 1211, so that the plurality of first heat exchange portions 1211 are connected in sequence, and the second direction is set at an angle to the first direction.

[0266] It should be noted that the shape of the first heat exchange portion 1211 can be various. For example, the first heat exchange portion 1211 can be straight or curved. In this way, multiple first heat exchange portions 1211 are bent and connected in sequence, so that the first heat exchange section 121 can form an S-shaped, I-shaped, V-shaped, and other forms of heat exchange channels. The shape of the first bending portion 1212 can be an arc or a broken line. "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 arranged vertically or in a non-vertical arrangement that only intersects. For example, the first direction and the second direction can be arranged at an angle 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, multiple first heat exchange parts 1211 are bent and connected to form an S-shaped heat exchange channel, which can realize heat exchange for multiple battery cells 100.

[0267] In the above embodiment, on the one hand, by setting a plurality of first heat exchange parts 1211, the heat exchange area of ​​the first heat exchange section 121 can be increased, and then 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 cell 100 is wrapped by the external battery cell 100, the temperature difference between the internal battery cells 100 is not large. Therefore, by setting a plurality of first heat exchange parts 1211, the overall heat exchange effect can be guaranteed while ensuring that the temperature difference between the internal and external battery cells 100 is small.

[0268] It can be understood that the first bending portion 1212 is arc-shaped, and the fluid flow directions at both ends of the first bending portion 1212 have a certain angle, so that the first bending portion 1212 can change the flow direction of the fluid, and then the two connected first heat exchange portions 1211 can be extended and arranged in 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 flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the fluid and further increasing the heat exchange efficiency of the first heat exchange section 121. Moreover, the structure of the first heat exchange tube 1a can be made more compact and the occupied space size can be smaller, which is convenient for the miniaturized design of the battery 200.

[0269] For example, the first bending portion 1212 is semicircular, so as to connect two first heat exchange portions 1211 that are parallel to each other and arranged at intervals, which is conducive to increasing the design diversity of the heat exchange channel 10, improving the compatibility of the first heat exchange tube 1a with multiple battery cells 100, and having a simple structure and easy production. Of course, the bending angle of the first bending portion 1212 can also be adjusted according to demand, for example, it can be 150°, or 135°, etc.

[0270] In addition, the number of the first bending portions 1212 can be one, two, three or more. The first bending portions 1212 can make the first heat exchange tube 1a arranged in a circuitous manner, thereby increasing the heat exchange area of ​​the first heat exchange tube 1a and improving the heat exchange efficiency.

[0271] Please refer to Fig.23 In some embodiments, the second heat exchange section 122 includes a second heat exchange part 1221, a third heat exchange part 1222 and a fourth heat exchange part 1223, the second heat exchange part 1221 extends along the first side circumference of the first heat exchange section 121, 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 second side circumference of the first heat exchange section 121, the first end of the third heat exchange part 1222 is connected to the second heat exchange part 1221 at an angle, and the second end of the third heat exchange part 1222 is connected to the first heat exchange section 121 at an angle; the fourth heat exchange part 1223 is connected to the second heat exchange part 1221, the fourth heat exchange part 1223 is connected to the second heat exchange part 1221 at an angle, and the fourth heat exchange part 1223 extends along the third side circumference of the first heat exchange section 121.

[0272] It can be understood that the fourth heat exchange part 1223 is connected to the end of the second heat exchange part 1221 away from 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 U-shaped area 120, and the first heat exchange section 121 is arranged in the U-shaped area 120 and is connected to the end of the third heat exchange part 1222 away from the second heat exchange part 1221.

[0273] 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 or 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 angle is 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0274] 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 is arranged at an angle greater than 0° and less than 180° to the first heat exchange section 121. For example, the second end of the third heat exchange part 1222 is connected to the first heat exchange section 121 and the angle is 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0275] The fourth heat exchange part 1223 is connected to 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 angle is 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0276] It should be noted that, this embodiment limits the second heat exchange section 122 to be arranged on three sides of the circumference of the first heat exchange section 121, and does not limit the specific positions of the second heat exchange section 1221, the third heat exchange section 1222 and the fourth heat exchange section 1223 relative to the first heat exchange section 121. Therefore, the specific positions of the second heat exchange section 1221, the third heat exchange section 1222 and the fourth heat exchange section 1223 can be designed according to actual conditions. For example, if the second heat exchange section 1221 can be arranged on one side of the first heat exchange section 121 in the first direction, the third heat exchange section 1222 and the fourth heat exchange section 1223 are respectively arranged on both sides of the first heat exchange section 121 in the second direction; if the second heat exchange section 1221 is arranged on one side of the first heat exchange section 121 in the second direction, the third heat exchange section 1222 and the fourth heat exchange section 1223 are respectively arranged on both sides of the first heat exchange section 121 in the first direction.

[0277] In the above-mentioned 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 compactness of the arrangement of the first heat exchange tube 1a, realizing the miniaturization of the structure of the first heat exchange tube 1a, which is beneficial to improving the volume energy density of the battery 200. At the same time, the structure of the first heat exchange tube 1a can be simplified, and the processing and production of the first heat exchange component 102 can be facilitated.

[0278] Please refer to Fig.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 bent and connected in sequence in the first direction. Among them, the second heat exchange part 1221 is located on one side of the multiple first heat exchange parts 1211 along the first direction, the third heat exchange part 1222 is located on one side of the multiple 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 one of the multiple first heat exchange parts 1211 that is farthest from the second heat exchange part 1221 along the first direction, the fourth heat exchange part 1223 is located on the other side of the multiple first heat exchange parts 1211 along the second direction, one end of the fourth heat exchange part 1223 is connected to one end of the second heat exchange part 1221 away from the third heat exchange part 1222, and the other end of the fourth heat exchange part 1223 extends along the first direction toward a direction away from the second heat exchange part 1221.

[0279] The plurality of first heat exchange parts 1211 are bent and connected in sequence in the first direction, that is, the plurality of first heat exchange parts 1211 are arranged in sequence in the first direction, and in the first direction, two adjacent and connected first heat exchange parts 1211 are bent and connected. The first heat exchange parts 1211 may extend along a straight line parallel to the second direction, the first heat exchange parts 1211 may extend along a straight line arranged at an angle to the second direction, and the first heat exchange parts 1211 may extend along a curve and / or a broken line in the second direction.

[0280] 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 farthest from the second heat exchange part 1221 are connected in sequence, and the multiple first heat exchange parts 1211 are arranged at intervals along the first direction and are bent and connected 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 the first heat exchange part 1211 farthest from the second heat exchange part 1221, and finally flows to the first heat exchange part 1211 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 the first heat exchange part 1211 closest to the second heat exchange part 1221, flows out from the first heat exchange part 1211 farthest from the second heat exchange part 1221, flows to the third heat exchange part 1222, and then flows through the second heat exchange part 1221 and the fourth heat exchange part 1223 in sequence through the third heat exchange part 1222.

[0281] by Fig.23 Taking the first heat exchange tube 1a arranged in the first direction away from the coordinate origin as an example, the first heat exchange part 1211 extends straightly along the second direction, and the multiple first heat exchange parts 1211 are arranged at intervals in the first direction. The second heat exchange part 1221 is arranged on the side of the multiple first heat exchange parts 1211 away from the coordinate origin along the first direction and extends straightly in the second direction, and is used for heat exchange with the edge of the side away from the coordinate origin of the multiple battery cells 100 in the first direction. The third heat exchange part 1222 is arranged on the side of the multiple first heat exchange parts 1211 close to the coordinate origin in the second direction and extends straightly in the first direction. The third heat exchange part 1222 is used for heat exchange with the edge of the side close to the coordinate origin in the second direction of the multiple battery cells 100. The fourth heat exchange part 1223 is arranged on the side of the multiple first heat exchange parts 1211 away from the coordinate origin in the second direction and extends straightly in the first direction. The fourth heat exchange part 1223 can be used for heat exchange with the edge of the side away from the coordinate origin in the second direction of the multiple battery cells 100.

[0282] In the above-mentioned embodiment, a plurality of first heat exchange parts 1211 are provided to be bent and connected 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 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 fourth heat exchange part 1223 is located on the other side of the plurality of first heat exchange parts 1211 along the second direction. The positional relationship among 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 limited, the layout of the first heat exchange tube 1a is further limited, the structure of the first heat exchange tube 1a is simplified, and the processing and manufacturing are facilitated.

[0283] Exemplarily, the third heat exchange part 1222 and the fourth heat exchange part 1223 are extended along the first direction, and the first heat exchange part 1211 and the second heat exchange part 1221 are both extended along the second direction, which can be beneficial to the circuitous arrangement of the first heat exchange tube 1a, thereby reducing the production difficulty of the first heat exchange tube 1a and reducing the production cost of the first heat exchange element 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, convenient to produce, and easy to arrange, thereby further reducing the production complexity and production cost of the first heat exchange channel 10.

[0284] Alternatively, if Fig.23 As shown, the third heat exchange part 1222 and the fourth heat exchange part 1223 are both extended 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. 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 sequentially connected to form a standard U-shaped flow channel. The two ends of the U-shaped region 120 are close in size, which is beneficial to control the temperature difference of the battery cells 100 at the two ends in the second direction and improve the uniformity of temperature. 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 sections of the first heat exchange tube 1a, avoid other heat exchange flow channels or avoid other components, thereby facilitating the layout of the first heat exchange tube 1a and a compact structure.

[0285] Please refer to Fig.23 In some embodiments, the fourth heat exchange portion 1223 extends along the first direction and extends to a position close to one of the plurality of first heat exchange portions 1211 that is farthest from the second heat exchange portion 1221. Specifically, the fourth heat exchange portion 1223 extends along the first direction, one end of the fourth heat exchange portion 1223 is connected to the second heat exchange portion 1221, and the other end of the fourth heat exchange portion 1223 extends to a position close to one of the plurality of first heat exchange portions 1211 that is farthest from the second heat exchange portion 1221, that is, the other end of the fourth heat exchange portion 1223 extends to be flush with the first heat exchange portion 1211 that is farthest from the second heat exchange portion 1221, or the other end of the fourth heat exchange portion 1223 extends to be close to the first heat exchange portion 1211 that is farthest from the second heat exchange portion 1221, or the other end of the fourth heat exchange portion 1223 extends to exceed the first heat exchange portion 1211 that is farthest from the second heat exchange portion 1221.

[0286] In this way, the length of the fourth heat exchange portion 1223 can be increased, the heat exchange area of ​​the fourth heat exchange portion 1223 can be increased, and the heat exchange effect of the first heat exchange element 102 can be further improved, which is also beneficial to the layout of the first heat exchange tube 1a.

[0287] Please refer to Fig.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 bent and connected in sequence 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, and 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; a 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, and a second end of the third heat exchange part 1222 is connected to one of the plurality of first heat exchange parts 1211 that is closest to the third heat exchange part 1222 along the first direction, and a fourth heat exchange part 1223 is located on the other side of the plurality of first heat exchange parts 1211 along the first direction, and one end of the fourth heat exchange part 1223 is connected to one end of the second heat exchange part 1221 away from the third heat exchange part 1222, and the other end of the fourth heat exchange part 1223 extends along the second direction toward a direction away from the second heat exchange part 1221.

[0288] The plurality of first heat exchange parts 1211 are bent and connected in sequence in the first direction, that is, the plurality of first heat exchange parts 1211 are arranged in sequence in the first direction, and in the first direction, two adjacent and connected first heat exchange parts 1211 are bent and connected. The first heat exchange parts 1211 may extend along a straight line parallel to the second direction, the first heat exchange parts 1211 may extend along a straight line arranged at an angle to the second direction, and the first heat exchange parts 1211 may extend along a curve and / or a broken line in the second direction.

[0289] It can be understood that the fourth heat exchange part 1223, the second heat exchange part 1221 and the third heat exchange part 1222 are connected in sequence with the first heat exchange part 1211 closest to the third heat exchange part 1222, and the multiple first heat exchange parts 1211 are arranged at intervals along the first direction and are bent and connected 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 through the second heat exchange part 1221 and the fourth heat exchange part 1223 in sequence through the third heat exchange part 1222.

[0290] In the above-mentioned embodiment, by arranging the second heat exchange part 1221 to be located on one side of the plurality of first heat exchange parts 1211 along the second direction, the third heat exchange part 1222 to be located on one side of the plurality of first heat exchange parts 1211 along the first direction, and the fourth heat exchange part 1223 to be located on the other side of the plurality of first heat exchange parts 1211 along the first direction, another layout of the first heat exchange tube 1a is defined, thereby increasing the diversity of the first heat exchange tube 1a so that it can meet the heat exchange requirements of different batteries 200, simplifying the structure of the first heat exchange tube 1a, and facilitating processing and manufacturing.

[0291] For example, Fig.25 As shown, the first heat exchange portion 1211, the third heat exchange portion 1222 and the fourth heat exchange portion 1223 extend in the second direction, and the second heat exchange portion 1221 extends in the first direction. Further, the first heat exchange portion 1211, the third heat exchange portion 1222 and the fourth heat exchange portion 1223 extend in a straight line in the second direction, and the second heat exchange portion 1221 extends in a straight line in the first direction. Among them, the linear structure is simple, convenient to produce, and easy to arrange, thereby further reducing the production complexity and production cost of the first heat exchange channel 10.

[0292] Exemplarily, the second heat exchange section 1221 and the third heat exchange section 1222 are transitionally connected via an arc-shaped bend, and the third heat exchange section 1222 and the first heat exchange section 1211 are transitionally connected via an arc-shaped bend, so that the flow direction of the heat exchange medium is changed, so that 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 bend can reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the heat exchange medium and further increasing the heat exchange efficiency. Optionally, the arc-shaped bend between the second heat exchange part 1221 and the third heat exchange part 1222, and the arc-shaped bend between the third heat exchange part 1222 and the first heat exchange part 1211 are respectively in the shape of a quarter of a circle, so that after the fluid passes through the arc-shaped bend, its flow direction can be changed from the original flow direction to a direction perpendicular to the original flow direction; at the same time, the arc shape can also reduce the resistance to the fluid flow, so that the fluid can flow smoothly in the arc-shaped bend, effectively preventing the medium from flowing too slowly and causing a decrease in heat exchange efficiency.

[0293] Please refer to Fig.23 In some embodiments, the second heat exchange section 122 further includes a fifth heat exchange portion 1224, which extends along the fourth side periphery of the first heat exchange section 121, and the fifth heat exchange portion 1224 closes at least a portion of the opening of the U-shaped region 120 formed by the second heat exchange portion 121, the third heat exchange portion 122 and the fourth heat exchange portion 125. Then, one of the above-mentioned first heat exchange portions 1211 may extend along the fourth side periphery of the first heat exchange section 121.

[0294] 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, thereby, the second heat exchange section 122 can basically cover the peripheral position of the battery 200 and exchange heat with the peripheral edge, so that the second heat exchange section 122 can exchange heat with all or most of the peripheral edges of the battery assembly. Therefore, the structure of the first heat exchange tube 1a can be set according to the actual arrangement of multiple battery cells 100 or the heat exchange requirements, so as to optimize the heat exchange structure and improve the heat exchange efficiency.

[0295] In the above-mentioned embodiment, by providing the fifth heat exchange part 1224, the second heat exchange section 122 can perform heat exchange on the four sides of the assembly consisting of all battery cells 100. In this way, the second heat exchange section 12 of a first heat exchange tube 1a can perform heat exchange on the four sides of the assembly consisting of multiple battery cells 100, which is beneficial to improving the heat exchange effect on the four sides of the battery 200 and enhancing the temperature uniformity of the battery 200.

[0296] Optionally, the fifth heat exchange part 1224 is arranged 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.

[0297] 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 refer to that the corresponding two parts are connected and are arranged at an angle greater than 0° and less than or equal to 180°; obviously, the third heat exchange part 1222 and the second heat exchange part 1221 are arranged at an angle greater than 0° and less than 180°, and the fourth heat exchange part 1223 and the second heat exchange part 1221 are arranged at an angle greater than 0° and less than 180°.

[0298] In some embodiments, the first heat exchange section 121 is connected to the downstream of the second heat exchange section 122 along the medium flow direction, that is, the heat exchange medium first flows through the second heat exchange section 122 and then flows into the first heat exchange section 121, wherein the second heat exchange section 122 is arranged around the circumference of the first heat exchange section 121. When the first heat exchange tube 1a exchanges heat with the battery cell 100, the peripheral temperature of the assembly composed of all battery cells 100 (hereinafter referred to as the battery assembly) dissipates heat quickly, especially under low-temperature heating conditions. The high-temperature heat exchange medium starts to exchange heat from the second heat exchange section 122, so that the first heat exchange tube 1a can preferentially exchange heat on the outer circumference of the battery assembly, which is beneficial to improve the temperature difference between the inside and outside of the above-mentioned battery assembly, and to a certain extent improve the service life of the battery 200.

[0299] In some embodiments, the first heat exchange element 102 is configured as follows: when heating the battery cell 100, the first connecting section 121 is connected to the downstream of the second heat exchange section 122 along the medium flow direction; when cooling the battery cell 100, the first heat exchange section 121 is connected to the upstream of the second heat exchange section 122 along the medium flow direction.

[0300] Specifically, when heating the battery assembly of the battery 200, the temperature of the heat exchange medium flowing in the first heat exchange element 102 is higher than the operating temperature of the battery 200. The first heat exchange element 102 heats the battery assembly and 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 inside the first heat exchange section 121.

[0301] 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 outside the battery assembly, and then cool the battery cells 100 in the middle of the battery assembly after the heat exchange medium enters the first heat exchange section 121. Since the battery cells 100 at the periphery of the battery assembly dissipate more heat to the external environment, the temperature of the battery cells 100 at the periphery of the battery assembly drops more. The heat exchange medium first heats the battery cells 100 at the periphery of the battery assembly. The higher temperature heat exchange medium can increase the temperature of the battery cells 100 at the periphery while compensating for the heat lost by the battery cells 100 due to heat dissipation to the external environment, thereby meeting their heating needs. The battery cells 100 at the middle position of the battery assembly have a small 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 meet their heating needs well. As a result, the heating effects obtained by the battery cells 100 at the periphery of the battery assembly and the battery cells 100 at the middle position of the battery assembly are basically the same, thereby making the temperatures of the battery cells 100 at the periphery of the battery assembly and the battery cells 100 at the middle position of the battery assembly more consistent after heating, making the temperature distribution in the battery 200 more uniform.

[0302] When cooling the battery assembly of the battery 200, the temperature of the heat exchange medium flowing in the first heat exchange element 102 is lower than the operating temperature of the battery 200. The first heat exchange element 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. 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.

[0303] When the battery 200 is cooled, the heat exchange medium flows from the first heat exchange section 121 to the second heat exchange section 122 , that is, the heat exchange medium flows from the middle of the battery assembly to the edge of the battery assembly and exchanges heat. Among them, since the heat dissipation of the battery cells 100 at the periphery of the battery 200 is better than that of the internal battery cells 100, the lower temperature heat exchange medium of the first heat exchange section 121 can better meet the heat dissipation requirements of the battery cells 100 at the middle of the battery assembly. At the same time, since the battery cells 100 at the periphery of the battery assembly can directly dissipate heat naturally toward the external environment, even if the temperature of the heat exchange medium of 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 periphery of the battery assembly and the battery cells 100 at the middle of the battery assembly are roughly the same, and then the temperatures of the battery cells 100 at the periphery of the battery assembly and the battery cells 100 at the middle of the battery assembly are relatively consistent after cooling and heat dissipation, reducing the temperature difference between the inside and outside of the battery assembly, and making the temperature distribution in the battery 200 more uniform.

[0304] Please refer to Figure 25-27 In some embodiments, the first heat exchange element 102 further includes a second heat exchange tube 1b, and the second heat exchange tube 1b and the first heat exchange tube 1a are arranged on the same side of the battery cell 100, and at least a portion 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 portion 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, and 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.

[0305] 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, and 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. There are multiple first heat exchange parts of the second heat exchange tube 1b and they are 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.

[0306] 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.

[0307] In the above technical solution, by setting the second heat exchange tube 1b, the diversity of the heat exchange channel 10 of the first heat exchange element 102 can be increased, making the arrangement of the heat exchange channel 10 more flexible, which is beneficial to further improve the heat exchange effect of the first heat exchange element 102 and improve the temperature uniformity of the battery 200.

[0308] Exemplarily, for the second heat exchange tube 1b: multiple first heat exchange parts 1211 are bent and connected in sequence in the first direction, the second heat exchange part 1221 is located on one side of the multiple first heat exchange parts 1211 along the second direction, and the third heat exchange part 1222 is located on one side of the multiple 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, and the second end of the third heat exchange part 1222 is connected to one of the multiple first heat exchange parts 1211 that is closest to the third heat exchange part 1222 along the first direction, and the fourth heat exchange part 1223 is located on the other side of the multiple first heat exchange parts 1211 along the first direction, one end of the fourth heat exchange part 1223 is connected to one end of the second heat exchange part 1221 away from the third heat exchange part 1222, and the other end of the fourth heat exchange part 1223 extends along the second direction toward a direction away from the second heat exchange part 1221.

[0309] Of course, in other examples, for the second heat exchange tube 1b: multiple first heat exchange parts 1211 are bent and connected in sequence in the first direction, the second heat exchange part 1221 is located on one side of the multiple first heat exchange parts 1211 along the first direction, and the third heat exchange part 1222 is located on one side of the multiple 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, and the second end of the third heat exchange part 1222 is connected to one of the multiple first heat exchange parts 1211 that is farthest from the second heat exchange part 1221 along the first direction, and the fourth heat exchange part 1223 is located on the other side of the multiple first heat exchange parts 1211 along the second direction, one end of the fourth heat exchange part 1223 is connected to one end of the second heat exchange part 1221 away from the third heat exchange part 1222, and the other end of the fourth heat exchange part 1223 extends along the first direction toward a direction away from the second heat exchange part 1221.

[0310] Please refer to Fig. 27 In some embodiments, the second heat exchange tube 1b includes a U-shaped area 120 having the same structure as the first heat exchange tube 1a, and at least a portion of the first heat exchange section 121 of the first heat exchange tube 1a is disposed in the U-shaped area 120 of the second heat exchange tube 1b, then a portion of the first heat exchange section 121 of the first heat exchange tube 1a is disposed in the U-shaped area 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 in the U-shaped area 120 of the second heat exchange tube 1b.

[0311] In the above technical solution, by arranging at least a portion 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 method of multiple heat exchange tubes 1 can be arranged according to the heat exchange requirements of various parts of the battery assembly, further increasing the heat exchange effect of the first heat exchange element 102 and improving the temperature uniformity of the battery 200.

[0312] Please refer to Fig. 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, and the third heat exchange section 123 and the fourth heat exchange section 124 are respectively bent to form a U-shaped area 120, and the third heat exchange section 123 is arranged in the U-shaped area 120 of the fourth heat exchange section 124, and the above-mentioned at least 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.

[0313] In the embodiment of the present application, the opening direction of the U-shaped region 120 of the third heat exchange section 123 may be the same as or different from the opening direction of the U-shaped region 120 of the fourth heat exchange section 124. Exemplarily, the opening direction of the U-shaped region 120 of the third heat exchange section 123 is the same as the opening direction of the U-shaped region 120 of the fourth heat exchange section 124. 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 conducive to providing a avoidance for the above-mentioned at least part of the first heat exchange section 121 of the first heat exchange tube 1a to extend into the U-shaped region 120 of the third heat exchange section 123.

[0314] In the above technical solution, by arranging the above-mentioned at least part of the first heat exchange section 121 of the first heat exchange tube 1a to be arranged in the U-shaped area 120 of the third heat exchange section 123, the above-mentioned at least 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 that the first heat exchange tube 1a and the second heat exchange tube 1b are wound around each other, 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 improve the temperature uniformity of the battery 200.

[0315] For example, Fig. 27 As shown, the third heat exchange section 123 includes a seventh heat exchange section 1231, an eighth heat exchange section 1232 and a ninth heat exchange section 1233, and the eighth heat exchange section 1232 and the ninth heat exchange section 1233 are respectively bent and connected at both ends of the length of the seventh heat exchange section 1231; the fourth heat exchange section 124 includes a tenth heat exchange section 1241, an eleventh heat exchange section 1242 and a twelfth heat exchange section 1243, and the eleventh heat exchange section 1242 and the twelfth heat exchange section 1243 are respectively bent and connected at both ends of the length of the tenth heat exchange section 1241.

[0316] 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 can also be arranged at an angle.

[0317] Please refer to Fig. 27 In some embodiments, the second heat exchange tube 1b also includes a fifth heat exchange section 125, the fifth heat exchange section 125 includes a sixth heat exchange part 1251 and a second bending part 1252, the sixth heat exchange part 1251 is multiple 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, and 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, and the second direction is set at an angle to the first direction.

[0318] Among them, 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 (i.e., the port 11 corresponding to the end of the third heat exchange section 123 away from the fourth heat exchange section 124). It can be seen that at least one of the two ends of the length of the third heat exchange section 123 is provided with the fifth heat exchange section 125, and the fifth heat exchange section 125 can be provided 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.

[0319] Optionally, the second bend 1252 is arc-shaped, and the fluid flow directions at both ends of the second bend 1252 have a certain angle, so that the second bend 1252 can change the flow direction of the fluid, and then the two connected sixth heat exchange parts 1251 can be extended and arranged in 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 bend 1252 is arc-shaped, and the arc shape can reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the fluid and further increasing the heat exchange efficiency of the fifth heat exchange section 125. Moreover, the structure of the second heat exchange tube 1b can be made more compact and the occupied space size can be smaller, which is convenient for the miniaturized design of the battery 200.

[0320] For example, the second bending portion 1252 is semicircular, so as to connect two sixth heat exchange portions 1251 that are parallel and spaced apart from each other, which is conducive to increasing the design diversity of the heat exchange channel 10, improving the compatibility of the second heat exchange tube 1b with multiple battery cells 100, and having a simple structure and easy production. Of course, the bending angle of the second bending portion 1252 can also be adjusted according to demand, for example, it can be 150°, or 135°, etc.

[0321] In addition, the number of the second bends 1252 can be one, two, three or more. The second bends 1252 can make the second heat exchange tube 1b arranged in a circuitous manner, thereby increasing the heat exchange area of ​​the second heat exchange tube 1b and improving the heat exchange efficiency.

[0322] In the above technical solution, by setting 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 be beneficial to achieve temperature control of the internal battery cell 100, and the setting of the fifth heat exchange section 125 will not affect the mutual winding between the first heat exchange tube 1a and the second heat exchange tube 1b.

[0323] Please refer to Fig. 27 In some embodiments, the first heat exchange element 102 further includes a third heat exchange tube 1c, and at least a portion 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 portion 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 the above-mentioned at least portion of the third heat exchange tube 1c arranged in the U-shaped region 120 of the second heat exchange tube 1b is non-straight.

[0324] In the above technical solution, by setting at least a portion of the third heat exchange tube 1c to be bent in the U-shaped area 120 of the second heat exchange tube 1b, it is convenient to further achieve good temperature control of the internal battery cell 100, which is beneficial to improve the temperature distribution of the entire battery 200 and facilitate improving the temperature uniformity of the battery 200.

[0325] 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 that are bent and connected, and the third heat exchange section 123 and the fourth heat exchange section 124 are respectively bent to form a U-shaped area 120, then at least a portion of the third heat exchange tube 1c can be bent and arranged in the U-shaped area 120 of the third heat exchange section 123, and / or at least a portion of the third heat exchange tube 1c can be bent and arranged in the U-shaped area 120 of the fourth heat exchange section 124.

[0326] In the embodiment of the present application, the bending arrangement of the portion of the third heat exchange tube 1c disposed in the U-shaped region 120 of the second heat exchange tube 1b is not specifically limited. For example, the third heat exchange tube 1c is substantially S-shaped, but is not limited thereto. For example, Fig. 27 As 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 area 120. The seventh heat exchange section 127 is bent within the U-shaped area 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.

[0327] Optionally, the seventh heat exchange section 127 includes a thirteenth heat exchange section 1271 and a third bending section 1272, the thirteenth heat exchange section 1271 is multiple and arranged at intervals along the first direction, each thirteenth heat exchange section 1271 extends along the second direction, and the third bending section 1272 is arc-shaped and is bent and connected between two adjacent thirteenth heat exchange sections 1271, so that the multiple thirteenth heat exchange sections 1271 are connected in sequence; of course, the multiple thirteenth heat exchange sections 1271 can also be arranged at intervals along the second direction, and each thirteenth heat exchange section 1271 extends along the first direction, but is not limited to this.

[0328] 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 arranged in the cavity 1051a, and the reinforcing partition 1052 has a plurality of spaced connection portions 1052a, the plurality of connection portions 1052a include a first connection portion 1052b and a second connection portion 1052c, the first connection portion 1052b and the second connection portion 1052c are respectively connected to the 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 connection portion 1052b and the second connection portion 1052c are staggered.

[0329] For example, the first connection part 1052b and the second connection part 1052c are respectively connected to the two side walls of the width of the beam body 1051. In the height direction of the beam body 1051, the first connection part 1052b and the second connection part 1052c are alternately arranged, then one of the two adjacent connection parts 1052a is the first connection part 1052b, and the other is the second connection part 1052c.

[0330] In the above technical solution, the first expansion beam B1 includes a beam body 1051 and a reinforcing partition 1052. The reinforcing partition 1052 is arranged in the cavity 1051a and divides the cavity 1051a of the beam body 1051 into a plurality of chambers 1051b, so that the reinforcing partition 1052 plays a certain supporting and reinforcing role on the opposite sides of the beam body 1051, which is beneficial to improving the structural strength, bearing capacity and structural stability of the first expansion beam B1, thereby improving the reliability of the use of the first expansion beam B1.

[0331] Exemplarily, both 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, so that the supporting direction of the reinforcing partition 1052 is basically opposite to the expansion force direction of the battery cell 100100, thereby achieving reliable support for the battery cell 100100. At this time, each chamber 1051b extends along the length direction of the first expansion beam B1.

[0332] Please refer to Figure 6 In some embodiments, the beam body 1051 includes a first plate body A1 and a second plate body A2 that are relatively 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 also 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.

[0333] Exemplarily, the first plate body A1, the second plate body A2 and the reinforcing partition 1052 extend along the length direction of the first expansion beam B1 respectively, and 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 conducive 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.

[0334] In the above technical solution, the beam body 1051 includes a first plate body A1 and a 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 it connected to the first plate body A1 through the first connecting part 1052b and the third connecting part 1052d, and is connected to the second plate body A2 through the second connecting part 1052c and the third connecting part 1052d, the first expansion beam B1 has a simple structure, is easy to assemble, and has good structural stability.

[0335] Please refer to Figure 6 In some embodiments, the battery 200 further includes a second expansion beam B2 spaced apart from the first expansion beam B1, the battery cell 100 is disposed between the first expansion beam B1 and the second expansion beam B2, a third fixing member 111 is disposed in the cavity 1051a of the first expansion beam B1, a fourth fixing member 112 is disposed in the cavity 1051a of the second expansion beam B2, and the battery 200 further includes a pull rope 110, the pull rope 110 is passed through the corresponding cavity 1051a, and the pull rope 110 is respectively connected to the third fixing member 111 and the fourth fixing member 112.

[0336] In the above technical solution, by setting the pull rope 110 connected to the third fixing member 111 and the pull rope 110 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; and, since the third fixing member 111 and the fourth fixing member 112 are arranged in the cavity 1051a of the corresponding expansion beam, even if the connection between at least one of the third fixing member 111 and the fourth fixing member 112 and the corresponding expansion beam fails, the above-mentioned at least one of the third fixing member 111 and the fourth fixing member 112 can also be confined in the cavity 1051a of the corresponding expansion beam, which is conducive to reducing the risk of the above-mentioned at least one of the third fixing member 111 and the fourth fixing member 112 being separated from the corresponding expansion beam and causing the pull rope 110 to fail.

[0337] Optionally, when the battery 200 includes a first expansion beam B1 and a second expansion beam B2, an escape space 200a may be formed between the first expansion beam B1 and the box body 101, the first heat exchange component 102 is disposed in the escape space 200a, and the second expansion beam B2 does not form an escape space 200a with the box body 101.

[0338] Of course, the structural type of the fixing beam 105 is not limited thereto.

[0339] Please refer to Figure 3 and Fig.16 In some embodiments, the box 101 includes a first box 101, the first box 101 is an integral stamping part (for example, the first box 101 is an integral sheet metal stamping part), and the first box 101 includes a bottom wall 1011a and a surrounding wall 1011b, the surrounding wall 1011b is arranged around the bottom wall 1011a, and the fixing beam 105 is connected to the bottom wall 1011a and the surrounding wall 1011b respectively. A first heat exchanger 102 is provided between at least one of the bottom wall 1011a and the surrounding wall 1011b and the battery cell 100, and / or a first heat exchanger 102 is provided between the top wall of the box 101 and the battery cell 100.

[0340] It can be understood that the surrounding wall 1011b can include multiple side walls connected end to end in sequence, and the surrounding wall 1011b and the bottom wall 1011a can cooperate to form a accommodating space, and the accommodating space can be formed as at least a part of the internal space of the box body 101; when a first heat exchange element 102 is provided between the surrounding wall 1011b and the battery cell 100, a first heat exchange element 102 can be provided between at least one of the multiple side walls and the battery cell 100.

[0341] 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, and the two are connected by multiple connectors to achieve sealing between the bottom wall 1011a and the surrounding wall 1011b. The number of connectors is large, even up to more than 100, which makes the assembly of the box body 101 cumbersome and the assembly efficiency low.

[0342] In the above technical scheme, by setting the first box body 101 including the bottom wall 1011a and the surrounding wall 1011b as an integral stamping part, the molding of the first box body 101 is facilitated, which is beneficial to reducing the cost of the first box body 101 and making the first box body 101 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 of the bottom of the first box body 101, thereby saving multiple connecting parts such as bolts in the box body 101 for realizing the sealing of the bottom of the first box body 101, saving the connection process of the bottom wall 1011a and the surrounding wall 1011b, and helping to improve the assembly efficiency of the box body 101.

[0343] Please refer to Figure 3 , Fig.16 and Fig.28 In some embodiments, the housing 101 has a top wall, a bottom wall 1011a and a surrounding wall 1011b, the surrounding wall 1011b is disposed 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 element 102.

[0344] In the above technical solution, by setting the first heat exchange element 102 on at least one of the top wall, the bottom wall 1011a and the surrounding wall 1011b, the number and arrangement positions of the first heat exchange elements 102 can be flexibly set according to actual needs, thereby facilitating the realization of diversified designs of the battery 200, so as to better meet actual differentiated needs.

[0345] 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, and the top wall is provided with a first heat exchange member 102, and the first heat exchange member 102 on the top wall is connected to the fixed beam 105. Therefore, the first heat exchange member 102 on the top wall can restrain the fixed beam 105 to a certain extent, which is conducive to improving the bearing capacity of the fixed beam 105.

[0346] Please refer to Fig.28 and Fig.29 In some embodiments, the battery 200 further includes at least one of a second heat exchange element 103 and a third heat exchange element 104, wherein at least one of the second heat exchange element 103 and the third heat exchange element 104 is used for heat exchange with the battery cell 100, and the second heat exchange element 103 is attached to the outside of the box body 101, and the third heat exchange element 104 is disposed between two adjacent battery cells 100.

[0347] When the battery 200 includes a second heat exchange element 103, the second heat exchange element 103 can be fitted with 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 element 103 and the battery cell 100 are separated by the box body 101, there is no need to consider the insulation setting between the second heat exchange element 103 and the battery cell 100, which can simplify the insulation design of the second heat exchange element 103, facilitate the simplification of the setting of the battery 200, reduce the processing difficulty and production cost, and the second heat exchange element 103 will not occupy the space in the box body 101, so that the capacity of the battery 200 will not be reduced due to the second heat exchange element 103; and / or, when the battery 200 includes a third heat exchange element 104, the third heat exchange element 104 can heat exchange with adjacent battery cells 100, and the third heat exchange element 104 can heat exchange with at least two battery cells 100.

[0348] In the embodiment of the present application, when the battery 200 includes a second heat exchange element 103, the setting position of the second heat exchange element 103 is not specifically limited; for example, the second heat exchange element 103 can be arranged on the lower side of the bottom wall 1011a of the box body 101, so that the second heat exchange element 103 can exchange heat with the battery cells 100 within a relatively large range, which is beneficial to improving the temperature control effect and temperature control efficiency of the battery cells 100. At this time, by arranging a bottom protective plate 113 under the second heat exchange element 103, the second heat exchange element 103 can be protected more reliably, the risk of the second heat exchange element 103 being damaged by collision and bump is reduced, and the working reliability of the second heat exchange element 103 is improved.

[0349] In the above technical solution, by setting the battery 200 to include at least one of the second heat exchange element 103 and the third heat exchange element 104, it is beneficial to improve the temperature control ability of the heat exchange component 1020 on the battery cell 100, improve the thermal management performance of the battery 200, and at the same time facilitate the temperature control of the battery cell 100 by using different heat transfer paths according to the different heat exchange requirements of the battery cell 100.

[0350] In a second aspect, an embodiment of the present application provides an electrical device 1000, comprising the above-mentioned battery 200, and the battery 200 is used to provide electrical energy.

[0351] In the above technical solution, since the power-consuming device 1000 adopts the above-mentioned battery 200 , it is beneficial to improve the reliability of the power-consuming device 1000 .

[0352] Please refer to the accompanying drawings again to describe the battery 200 according to a specific embodiment of the present application.

[0353] Embodiment 1

[0354] refer to Figure 16-Figure 19 and Fig.23The battery 200 includes a box body 101, a fixed beam 105 and a plurality of battery cells 100, all of which are arranged in the box body 101; the battery 200 also includes a first heat exchanger 102, the first heat exchanger 102 and the fixed beam 105 are arranged in the box body 101 at intervals, so that the first heat exchanger 102 and the fixed beam 105 are thermally insulated, and the first heat exchanger 102 is located between the box body 101 and the battery cells 100, so as to exchange heat with all of 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 integral stamping 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.

[0355] The fixed beam 105 is configured as a first expansion beam B1, and the battery 200 further includes a second expansion beam B2. The first expansion beam B1 divides the internal space of the box 101 into a first cavity 101a and a second cavity 101b. The second expansion beam B2 is disposed in the first cavity 101a. All battery cells 100 are disposed in the first cavity 101a and 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 101. The first heat exchanger 102 is disposed in a corresponding avoidance channel 200a, so that the first heat exchanger 102 extends from the first cavity 101a to the second cavity 101b. The wall surface of the first expansion beam B1 corresponding to the avoidance channel 200a is spaced from the first heat exchanger 102. The box 101 has a first recess 101c, and the second recess 101c forms at least part of the avoidance channel 200a. Of course, the first heat exchange element 102 may also be disposed through a plurality of avoidance passages 200a.

[0356] A heat insulating member 107 is provided between the first expansion beam B1 and the bottom wall 1011a of the box body 101. The heat insulating member 107 is an integral member and includes a first heat insulating portion 1071 and a second heat insulating portion 1072. The first heat insulating portion 1071 is provided between the wall surface of the first expansion beam B1 corresponding to the avoidance channel 200a and the first heat exchange member 102, and the second heat insulating portion 1072 is provided between the bottom wall 1011a of the box body 101 excluding the portion corresponding to the avoidance channel 200a and the first expansion beam B1.

[0357] The first heat exchange element 102 includes two heat exchange tubes 1, each heat exchange tube 1 has two ends, one of which defines a first port 11a, and the other end defines a second port 11b. The peripheral side of the first heat exchange element 102 includes two sides arranged oppositely along the first direction X1 and two sides arranged oppositely along the second direction X2. The first box body 101 and the second box body 102 are arranged oppositely along the fifth direction X5.

[0358] Taking the first direction X1 as the direction from left to right, the second direction X2 as the direction from back to front, and the fifth direction X5 as the direction from bottom to top as an example, the above three directions are perpendicular to each other:

[0359] The two heat exchange tubes 1 of the first heat exchange member 102 are arranged at intervals along the left-right direction. Each heat exchange tube 1 is formed by bending a single tube. The heat exchange tube 1 is bent in an arc shape at the bending position. Each heat exchange tube 1 is a flat tube or a harmonica tube. The thickness direction of the heat exchange tube 1 is the X5 direction. Each heat exchange tube 1 also includes a connecting section 12 connected between the two ends. The central axes of at least the connecting sections 12 of all heat exchange tubes 1 are located in the same plane to better cooperate with the battery cell 100.

[0360] Each heat exchange tube 1 is respectively configured as a first heat exchange tube 1a, and 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 arranged in 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 connecting sections 12 of the two heat exchange tubes 1 can be arranged symmetrically about the center line of the first heat exchange element 102 perpendicular to the left and right directions.

[0361] The first heat exchange section 121 includes a first heat exchange portion 1211 and a first bending portion 1212. The first heat exchange portion 1211 is multiple and arranged at intervals along the first direction. Each second heat exchange portion 1211 extends straight 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.

[0362] The second heat exchange section 122 includes a second heat exchange portion 1221, a third heat exchange portion 1222, a fourth heat exchange portion 1223 and a fifth heat exchange portion 1224. The second heat exchange portion 1221 extends along the right circumference of the first heat exchange section 121 (the second heat exchange portion 1221 extends along the second direction). 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 rear circumference of the first heat exchange section 121 (the third heat exchange portion 1222 extends along the first direction). The first end of the third heat exchange portion 1222 is connected to the second heat exchange portion 1221 at an angle of approximately 90°, the second end of the third heat exchange portion 1222 is connected to the first heat exchange section 121 at an angle of approximately 90°, and the fourth heat exchange portion 1223 is connected to the second heat exchange portion 1224. The heat exchange part 1221 is connected 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 side periphery of the first heat exchange section 121 (the fourth heat exchange part 1223 extends along the first direction), so 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 is set to the left; the fifth heat exchange part 1224 extends along the left side periphery 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.

[0363] The first heat exchange tube 1a also 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 end of the heat exchange tube 1, and the fourth heat exchange section 1223 is bent and connected to the other end of the heat exchange tube 1.

[0364] Embodiment 2

[0365] Reference Figure 3 , Figure 20-22 Combined with Fig.11 The structure of this embodiment is substantially the same as that of the first embodiment, wherein the same reference numerals are used for the same components, and the only difference is that: the first expansion beam B1 has a first recess 105a, the first recess 105a and the second recess 101c are configured to form a avoidance channel 200a, the first heat exchange member 102 further includes a current collector 2, the current collector 2 corresponds to the avoidance channel 200a one-to-one, the current collector 2 is connected to multiple ends and is arranged in the second cavity 101b, the avoidance channel 200a is configured to allow the current collector 2 to pass through, and each avoidance channel 200a is respectively provided with a bearing 106, and the bearing 106 abuts against the battery cell 100. Among them, the multiple ends connected to the current collector 2 may belong to the same heat exchange tube 1, or may belong to different heat exchange tubes 1.

[0366] The battery 200 also includes a third expansion beam B3, which is arranged 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 escape space. The first heat exchange element 102 is partially arranged in the first cavity 101a and is passed through the escape space. The third expansion beam B3 is spaced apart from the first heat exchange element 102 to achieve heat insulation, and the third expansion beam B3 is in contact with the wall of the box body 101 except for the third recess 101d.

[0367] The three heat exchange tubes 1 of the first heat exchange element 102 are respectively the first heat exchange tube 1a, the second heat exchange tube 1b and the third heat exchange tube 1c. 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 arranged in the U-shaped area of ​​the second heat exchange section 122, and the first heat exchange section 121 is bent and connected with 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 portion 1211 is multiple and arranged at intervals along the first direction. Each second heat exchange portion 1211 extends straight along the second direction. The bending portion 1212 is arc-shaped and is bent and connected between two adjacent first heat exchange portions 1211, so that 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, and the second heat exchange portion 1221, the third heat exchange portion 1222, and the fourth heat exchange portion 1223 form a 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.

[0368] At least the connecting section 12 of the second heat exchange tube 1a is arranged in the U-shaped area 120 of the first heat exchange tube 1a. For the second heat exchange tube 1a, its connecting section 12 includes the third heat exchange section 123, the third heat exchange section 124 and the fifth heat exchange section 125. The third heat exchange section 123 and the fourth heat exchange section 124 are bent to form the U-shaped area 120 respectively. The third heat exchange section 123 and the fourth heat exchange section 124 are bent and connected. The third heat exchange section 123 is arranged in the U-shaped area 120 of the fourth heat exchange section 124. At least 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. Among them, the three side edges corresponding to the U-shaped area 120 of the third heat exchange section 123 are respectively parallel to the three side edges corresponding to the U-shaped area 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 part 1251 and a second bending part 1252. There are multiple sixth heat exchange parts 1251 and they are arranged at intervals along the first direction. Each sixth heat exchange part 1251 extends along the second direction. The second bending part 1252 is arc-shaped and 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.

[0369] Embodiment 3

[0370] Reference Figure 4 and Fig.25 The structure of this embodiment is substantially the same as that of the first embodiment, wherein the same components are marked with the same reference numerals, and the only difference is that: one of the two heat exchange tubes 1 of the first heat exchange element 102 is configured as a first heat exchange tube 1a, and the other is configured as a second heat exchange tube 1b; one side of the first heat exchange element 102 in the second direction corresponds to two current collectors 2, 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.

[0371] 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 arranged in 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 the first direction. Each second heat exchange portion 1211 extends straight along the second direction. The bending portion 1212 is arc-shaped and is bent and connected between two adjacent first heat exchange portions 1211, so that 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, and the second heat exchange portion 1221, the third heat exchange portion 1222, and the fourth heat exchange portion 1223 form a 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.

[0372] At least the connecting section 12 of the second heat exchange tube 1a is arranged in 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 arranged in 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 portion 1211 is multiple and arranged at intervals along the first direction, each of the first heat exchange portions 1211 is arranged at intervals along the first direction, and ... The second heat exchange part 1211 extends linearly along the second direction, and the first bending part 1212 is arc-shaped and bent and connected between two adjacent first heat exchange parts 1211, so that multiple first heat exchange parts 1211 are connected in sequence; the second heat exchange section 122 includes a second heat exchange part 1221, a third heat exchange part 1222, and a fourth heat exchange part 1223, and the second heat exchange part 1221, the third heat exchange part 1222, and the fourth heat exchange part 1223 form a U-shaped area 120, the second heat exchange part 1221 extends along the first direction, the third heat exchange part 1222 extends along the second direction, and the fourth heat exchange part 1223 extends along the second direction.

[0373] In addition, it should be noted that the various specific technical features described in the above-mentioned specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will not further explain various possible combinations. In addition, the various different embodiments of the present application can also be combined arbitrarily, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application. In other words, the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0374] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in 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, and the fixed beam and / or the box body form an escape space connecting the first cavity and the second cavity; A battery cell is disposed in the box body and located in the first cavity, and the fixing beam is configured as a first expansion beam and has a first mating surface that abuts against the battery cell; a first heat exchange member, disposed in the housing and between the battery cell and the housing, the first heat exchange member being formed with at least one heat exchange channel and comprising a heat exchange portion and a connection portion, the heat exchange portion being located in the first cavity and used for heat exchange with the battery cell, the connection portion being formed with a port of the heat exchange channel, the connection portion being connected to the heat exchange portion and being disposed through the avoidance space and extending to the second cavity, so that the port of the heat exchange channel is located in the second cavity, and the avoidance space being configured to allow the connection portion to extend from the first cavity through the avoidance space to the second cavity; 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.

2. The battery according to claim 1, characterized in that The fixing 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 the escape space.

3. 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.

4. The battery according to claim 1, 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.

5. The battery according to claim 4, characterized in that The escape space is configured to allow the current collector to pass therethrough.

6. The battery according to claim 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.

7. The battery according to claim 6, 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.

8. The battery according to claim 1, 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 claim 1, 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, 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 claim 11, 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 claim 1, 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 claim 1, 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 claim 1, 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 claim 1, characterized in that The fixing beam is spaced apart from the first heat exchange element, so that the first heat exchange element and the fixing 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 claim 1, characterized in that The first heat exchange member includes at least one heat exchange tube, which defines the heat exchange flow channel and 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, 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 extending along a fourth side periphery of the first heat exchange section and closing 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 claim 25, characterized in that The first heat exchange element 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 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 claim 30, 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 24, characterized in that The fixed beam 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, 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 24, 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 24, 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 top wall is provided with the first heat exchange component, and the first heat exchange component on the top wall is connected to the fixed beam.

41. The battery according to any one of claims 1 to 24, 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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