Battery and electric device

Abstract

The utility model discloses a battery and a power utilization device, the battery comprises a box body assembly, a battery monomer and a heat exchange assembly, the box body assembly comprises a box body and an expansion beam, the expansion beam is arranged in the box body, the battery monomer is arranged in the box body and abuts against the expansion beam, and the heat exchange assembly comprises a first heat exchange piece; the first heat exchange piece is arranged in the box body and located between the battery monomers and the box body, the first heat exchange piece is used for exchanging heat with the battery monomers, and the first heat exchange piece and the expansion beam are arranged at intervals, so that the first heat exchange piece and the expansion beam are arranged in a heat insulation mode. According to the battery provided by the embodiment of the invention, the loss of heat or cold of the first heat exchange piece can be reduced, and the heat management performance is 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. Usually, batteries use heat exchange components to achieve temperature control of battery cells, and the heat exchange component's ability to control and balance the temperature of battery cells needs to be improved. Utility Model Content

[0003] The present application proposes a battery and an electrical device, wherein the battery can reduce the loss of heat or cold in a first heat exchange component and improve thermal management performance.

[0004] In a first aspect, an embodiment of the present application provides a battery, comprising: a box assembly, comprising a box and an expansion beam, the expansion beam being disposed in the box; a battery cell being disposed in the box and abutting against the expansion beam; a heat exchange assembly, comprising a first heat exchange element, the first heat exchange element being disposed in the box and between the battery cell and the box, the first heat exchange element being used for heat exchange with the battery cell, and the first heat exchange element being spaced apart from the expansion beam so as to be thermally insulated from the expansion beam.

[0005] In the above technical solution, the first heat exchange element and the expansion beam are spaced apart so as to be thermally insulated from each other, thereby reducing the heat exchange between the first heat exchange element and the expansion beam, reducing the amount of heat or cold transferred to the expansion beam by the first heat exchange element, and improving the temperature difference between the battery cells adjacent to the expansion beam and the battery cells at other positions, which is beneficial to improving the balanced temperature distribution inside the battery, and at the same time is beneficial to increasing the proportion of heat or cold transferred to the battery cells by the first heat exchange element, thereby improving the thermal management performance of the battery.

[0006] In some embodiments, the heat exchange assembly further includes at least one of a second heat exchange element and a third heat exchange element, the second heat exchange element is disposed outside the box, and the third heat exchange element is disposed between two adjacent battery cells.

[0007] In the above technical solution, by setting up a heat exchange component including at least one of a second heat exchange component and a third heat exchange component, 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.

[0008] In some embodiments, the battery further includes: a heat insulating member disposed between the first heat exchange member and the expansion beam.

[0009] In the above technical solution, by arranging a heat insulating member between the first heat exchange member and the expansion beam, it is beneficial to further increase the thermal resistance between the first heat exchange member and the expansion beam, and facilitate further reducing the heat exchange amount between the first heat exchange member and the expansion beam.

[0010] In some embodiments, there are multiple expansion beams, one of which divides the internal space of the box into a first cavity and a second cavity, a portion of the first heat exchange element and the battery cell are both arranged in the first cavity, at least one avoidance channel is formed between the expansion beam and the box, the first heat exchange element is inserted into the corresponding avoidance channel so that the first heat exchange element extends from the first cavity to the second cavity, and the wall surface of the expansion beam corresponding to the avoidance channel is spaced apart from the first heat exchange element.

[0011] In the above technical solution, at least one avoidance channel is formed between the expansion beam and the box body, and the first heat exchanger is inserted into the corresponding avoidance channel so that the first heat exchanger extends from the first cavity to the second cavity, which facilitates the assembly of the first heat exchanger and the expansion beam, and facilitates the first heat exchanger to extend to the second cavity without bending around the expansion beam, which is conducive to simplifying the structure of the first heat exchanger; at the same time, the setting of the above avoidance channel can make the interface of the first heat exchanger all located in the second cavity, that is, the interface of the first heat exchanger and the battery cell are respectively located in different cavities, which is convenient for the box body to provide a suitable layout space for the connection between the first heat exchanger and other components, and at the same time, the expansion beam can separate the interface of the first heat exchanger from the battery cell, which is conducive to reducing the influence of heat exchange medium leakage at the interface position of the first heat exchanger on the battery cell, and is convenient to improve the reliability of the battery cell; and the wall surface of the expansion beam corresponding to the avoidance channel is spaced from the first heat exchanger, which is convenient for realizing the heat insulation setting of the first heat exchanger and the expansion beam under the premise that the first heat exchanger is inserted from one side of the expansion beam to the other side of the expansion beam.

[0012] In some embodiments, the expansion 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 avoidance channel.

[0013] In the above technical solution, an avoidance channel is constructed by setting a first recess and / or a second recess, which facilitates the molding of the avoidance channel and facilitates, according to needs, that the avoidance channel has a suitable cross-sectional area that can accommodate the penetration portion of the first heat exchanger. Under the premise of achieving smooth penetration of the first heat exchanger, the cross-sectional area of ​​the avoidance channel can be appropriately reduced, which is beneficial to reducing the molding difficulty of the avoidance channel and / or reducing the weakening of the expansion beam.

[0014] In some embodiments, portions of the first heat exchange element located on opposite sides of the expansion beam are connected at an obtuse angle.

[0015] In the above technical solution, the parts of the first heat exchanger located on the opposite sides of the expansion beam are connected at an obtuse angle, so that during the assembly process of the first heat exchanger, the penetrating part of the first heat exchanger is first aligned with the avoidance channel. At this time, the first heat exchanger is roughly inclined. As the first heat exchanger is penetrated, the inclination angle of the first heat exchanger gradually decreases until the first heat exchanger is completely penetrated. At this time, most of the first heat exchanger is in contact with the corresponding wall of the box body, which facilitates the penetration of the first heat exchanger and is conducive to improving the installation convenience of the first heat exchanger.

[0016] In some embodiments, the first heat exchange component includes a heat exchange tube and a fluid collector, a heat exchange channel is defined in the heat exchange tube, the end of the heat exchange channel is passed through the corresponding avoidance channel, the fluid collector corresponds to the avoidance channel one by one, the fluid collector is connected to the end of the heat exchange channel and is arranged in the second cavity, the fluid collector is connected to the interfaces of multiple ends of the corresponding avoidance channel, or the fluid collector separates the interfaces of multiple ends of the corresponding avoidance channel into multiple independent flow channels.

[0017] In the above technical solution, by setting the first heat exchange element to include a heat exchange tube and a fluid collector, it is convenient to flexibly set the first heat exchange element by adjusting at least one of the number of heat exchange tubes and the number of fluid collectors; at the same time, the setting of the fluid collector makes it easy to improve the overall structural stability and reliability of the first heat exchange element while ensuring the normal circulation of the medium in each heat exchange tube.

[0018] In some embodiments, the avoidance channel is configured to allow the corresponding current collector to pass therethrough.

[0019] In the above technical solution, by setting the avoidance channel structure to allow the corresponding current collector to pass through, it is convenient to achieve sufficient operating space when connecting the heat exchange tube and the current collector, and facilitate the connection operation of the heat exchange tube and the current collector.

[0020] 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 channel. The portion of the first heat exchange element that passes through the avoidance channel is arranged in the second recess, and the expansion beam is in contact with the wall of the box body except the second recess; or, the expansion beam is spaced apart from the wall of the box body except the second recess.

[0021] In the above technical scheme, the expansion beam is arranged to fit with the wall of the box body except the second recess. For the expansion beam and the above-mentioned wall of the box body, the expansion beam is separated from the wall of the box body at the position where the first heat exchanger is inserted, that is, the expansion beam is separated from the second recess c, so as to achieve heat insulation between the expansion beam and the first heat exchanger while avoiding the first heat exchanger. At the position where the first heat exchanger is not inserted, the expansion beam fits with the wall of the box body, that is, the expansion beam and the wall of the box body are zero-fit, which is convenient for increasing the matching area between the expansion beam and the box body, and is beneficial for improving the installation reliability of the expansion beam. By arranging the expansion beam and the wall of the box body except the second recess to be spaced apart, it is beneficial for further increasing the interval between the entire expansion beam and the first heat exchanger, which is convenient for improving the thermal resistance between the entire expansion beam and the first heat exchanger, reducing the heat or cold transferred from the first heat exchanger to the expansion beam, and is convenient for improving the energy utilization rate of the first heat exchanger.

[0022] 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 provided between a wall surface of the expansion beam corresponding to the avoidance channel and the first heat exchange member.

[0023] 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 expansion beam and the first heat exchanger is further increased by the insulation part.

[0024] In some embodiments, the thermal insulation member further comprises 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 expansion beam.

[0025] In the above technical solution, by arranging the second insulation part between the part of the wall of the box body except the second recess and the expansion beam, it is convenient to sandwich the insulation member between the box body and the expansion beam, and to realize reliable installation of the insulation member by fixing the expansion beam and the box body, so that the insulation member can provide a relatively flat mating surface for the connection between the box body and the expansion 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.

[0026] In some embodiments, a first fixing member is further provided on the expansion beam, at least a portion of which is located inside the expansion beam, and the battery further includes a second fixing member, which passes through the box body, the second insulation portion and the expansion beam and is connected to the first fixing member.

[0027] In the above technical solution, at least part of the first fixing member is arranged to be located inside the expansion beam, and the second fixing member is arranged through the box, the second heat insulation part and the expansion beam and connected to the first fixing member, so that the box, the heat insulation member and the expansion 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 expansion beam, so that there is enough operating space during the assembly of the second fixing member, and the assembly convenience 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.

[0028] In some embodiments, the expansion beam has a first recess, which is configured as at least a portion of the avoidance channel. The expansion beam also has a first mating surface that abuts against the battery cell. The box assembly also includes: a carrier, which is arranged in the avoidance channel and has a second mating surface that abuts against the battery cell. The first mating surface is flush with the second mating surface. The carrier has a groove that avoids the first heat exchange component, and the groove runs through the outer peripheral side of the carrier.

[0029] In the above technical solution, by arranging a support in the avoidance channel and making the second mating surface flush with the first mating surface, the support can bear the expansion force of the battery cell together with the expansion beam, which is beneficial to reducing the risk of lithium precipitation caused by excessive deformation difference between the battery cell at the avoidance channel position and other positions. It is also beneficial to reduce the risk of battery cell shell rupture and electrolyte leakage due to uneven force, thereby improving the reliability of battery use.

[0030] In some embodiments, a stopper is formed on at least one of the expansion beam and the box body, which abuts against the support member in the normal direction of the first matching surface to limit the movement of the support member from the first cavity toward the second cavity.

[0031] In the above technical scheme, a stopper is formed on at least one of the expansion beam and the box body to limit the movement of the support member in the direction from the first cavity toward the second cavity, so as to realize reliable limitation of the support member in the width direction of the expansion beam. At the same time, the stopper can resist the expansion force exerted by the battery cell on the support member, which is beneficial to improving the carrying capacity of the support member, so that the support member can stably withstand the expansion force of the battery cell and reduce the probability of the support member moving toward the second cavity under the action of the battery cell; and if at least one of the expansion beam and the box body is also connected and fixed to the support member by other means, such as at least one of the expansion beam and the box body is bonded to the support member, the above scheme is beneficial to reducing the force borne by other connection methods between at least one of the expansion beam and the box body and the support member, which is beneficial to improving the setting reliability and stability of the support member.

[0032] In some embodiments, a stop portion is formed on one side of the expansion beam facing the first cavity at the position of the avoidance channel; 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 expansion beam, and the stop step is formed as the stop portion.

[0033] In the above technical scheme, a stop portion is formed at the avoidance space position by arranging a side of the expansion beam facing the first cavity, so that the stop portion can be limited by the expansion beam's own structure to achieve the limitation of the support member, without the need for a separate setting, which is conducive to simplifying the structure of the expansion beam. At the same time, the stop portion is located on the side of the expansion beam facing the first cavity, which is convenient for matching with the installation method of the support member "cooperating with the avoidance channel 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 support member, which is conducive to improving the convenience of assembly; a stop step protruding toward the expansion beam is formed by arranging 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 support 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.

[0034] In some embodiments, in a cross section of the expansion beam, the stopper on the expansion beam is formed as an arc-shaped structure, and the cross section of the expansion beam is perpendicular to the length direction of the expansion beam.

[0035] In the above technical solution, the stopper portion on the expansion beam is formed into an arc structure by being arranged on the cross section of the expansion 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 expansion 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 expansion 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 expansion beam, reducing the processing difficulty, and improving production efficiency.

[0036] In some embodiments, the support member 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 engaged with the expansion beam to limit the movement of the support member along the direction from the first cavity to the second cavity.

[0037] 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 expansion beam are stop-fitted, if the expansion beam produces a certain deformation 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 expansion beam so that the second matching surface of the support member changes 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.

[0038] In some embodiments, the mating portion has a first surface and a second surface, the first surface is formed as an arcuate surface recessed toward the second surface and mating with the expansion beam, and the second surface is connected to the second surface and is arranged flush with the second mating surface.

[0039] In the above technical solution, the first surface of the matching part is arranged to stop and cooperate with the expansion beam. Since the first surface is arranged in an arc shape, it is convenient to realize the limited cooperation between the carrier and the expansion 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 cooperation between the second matching surface and the battery cell.

[0040] In some embodiments, at least one latch hole is formed on the expansion beam, and the carrier also includes: at least one latch hook portion, which is formed at the outer edge of the plate body and 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.

[0041] In the above technical solution, by setting the hook portion of the carrier to be clamped in the clamping hole on the expansion 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.

[0042] 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 first heat exchange component, and the supporting portion is in a stop-fitting relationship with the box body.

[0043] In the above embodiment, by providing the support portion, it is convenient to strengthen the plate body portion and improve the structural strength of the carrier, and the support portion will not affect the stop-and-stop fit between the plate body portion and the battery cell; and the stop-and-stop fit between the support portion 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 portion, which is beneficial to further improve the installation reliability and load-bearing capacity of the carrier, and the carrier is respectively matched with the expansion beam and the box body through the matching portion and the support portion, so that the entire plate body portion can be supported and limited in a more balanced manner. At the same time, since the support portion avoids the groove setting, the setting of the support portion will not interfere with the first heat exchange component, so that the convenient assembly of the carrier is realized.

[0044] In some embodiments, the width of the support portion in the thickness direction of the plate body increases from the matching portion toward the first heat exchange element.

[0045] In the above technical solution, by setting the width of the support portion in the direction of the plate thickness to increase from the matching portion toward the first heat exchanger, it is convenient to increase the stop matching area between the support portion and the box body with a small amount of material, improve the matching reliability of the support portion and the box body, and achieve a balance between cost and load-bearing reliability.

[0046] In some embodiments, the bearing member is disposed between the first heat exchange member and the expansion beam, and the thermal conductivity of the bearing member is lower than the thermal conductivity of the expansion beam; and / or the bearing member is spaced apart from the first heat exchange member.

[0047] In the above technical solution, the carrier is arranged between the first heat exchanger and the expansion beam, and at the same time, the thermal conductivity of the carrier is lower than the thermal conductivity of the expansion 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 expansion beam, and reduce the heat exchange between the expansion beam and the first heat exchanger group, which is beneficial to increase the proportion of heat or cold transferred from the first heat exchanger to the battery cell to a certain extent, and improve 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.

[0048] In some embodiments, the strength of the material of the load bearing member is at least 0.8 times the strength of the material of the expansion beam.

[0049] In the above technical solution, by setting the strength of the material of the bearing member to be at least 0.8 times the strength of the material of the expansion beam, the bearing member itself can have a good bearing capacity so as to reliably and stably withstand the expansion force of the battery cell.

[0050] 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.

[0051] 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, the entire surface of the battery cell facing the expansion beam can be supported, which is convenient for improving the uniformity of the force applied to the battery cell when it expands and deforms, and improving problems such as lithium deposition and liquid leakage caused by uneven force, thereby improving the reliability of battery use.

[0052] 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.

[0053] 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.

[0054] In some embodiments, the first heat exchange element includes 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] In the above technical solution, 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.

[0060] 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.

[0061] 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 / second 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.

[0062] 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 a portion 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.

[0063] In the above-mentioned embodiment, by providing the fifth heat exchange part, the second heat exchange section can perform heat exchange on the four sides of the assembly consisting of all battery cells. In this way, the second heat exchange section of a first heat exchange tube can be used to perform heat exchange on the four sides of the assembly consisting of multiple battery cells, which is beneficial to improving the heat exchange effect on the four sides of the battery and enhancing the temperature uniformity of the battery.

[0064] In some embodiments, the first heat exchange section is connected to the downstream of the second heat exchange section along the fluid flow direction; or, the first heat exchange tube is configured as follows: when heating the battery cell, the first heat exchange section is connected to the downstream of the second heat exchange section along the fluid flow direction, and when cooling the battery cell, the first heat exchange section is connected to the upstream of the second heat exchange section along the fluid flow direction.

[0065] In the above technical solution, by setting the first heat exchange section to be connected to the downstream of the second heat exchange section along the fluid flow direction, the first heat exchange channel can preferentially exchange heat on the outer circumference of the battery, which is beneficial to improve the temperature difference of the battery in different environments and to a certain extent improve the service life of the battery. By setting the first heat exchange tube to be configured as follows: when heating the battery cell, the first heat exchange section is connected to the downstream of the second heat exchange section along the fluid flow direction; when cooling the battery cell, the first heat exchange section is connected to the upstream of the second heat exchange section along the fluid flow direction, the heat exchange effect on the battery can be further improved, and the temperature uniformity of multiple battery cells can be improved.

[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 and the first heat exchange tube is the same or different.

[0067] In the above technical solution, by setting the second heat exchange tube, the diversity of the heat exchange flow channel of the heat exchange component can be increased, making the arrangement of the heat exchange tube more flexible, which is conducive to further improving the heat exchange effect of the heat exchange component and improving 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 heat exchange assembly 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 end portion,

[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 expansion beam 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 parts, the plurality of connection parts including 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 alternately arranged.

[0077] In the above technical solution, an expansion beam is provided including a beam body and a reinforcing partition. The reinforcing partition is arranged in the cavity and divides the cavity of the beam body into a plurality of 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 expansion beam, thereby improving the reliability of the 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, there are multiple expansion beams including a first expansion beam and a second expansion beam that are spaced apart, 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 box assembly 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, and the expansion beam is connected to the bottom wall and the surrounding wall respectively.

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

[0085] In the above technical solution, by adopting the above battery, it is convenient to achieve good temperature control of the battery and improve the reliability of the use of the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] 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:

[0087] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0088] Figure 2 An exploded view of the structure of a battery provided in some embodiments of the present application;

[0089] Figure 3 A partial schematic diagram of a battery provided for some embodiments of the present application;

[0090] Figure 4 for Figure 3 An exploded view of the battery shown;

[0091] Figure 5 for Figure 3 A cross-sectional view of a battery shown in ;

[0092] Figure 6 for Figure 5 The enlarged view of the circled section A;

[0093] Figure 7 A partial schematic diagram of a battery provided for some embodiments of the present application;

[0094] Figure 8 For along Figure 7 Sectional view along the midline BB;

[0095] Fig. 9 for Figure 8 The enlarged view of the C section circled in the middle;

[0096] Fig.10 for Figure 7 Another schematic diagram of the battery shown in;

[0097] Fig.11 A partial schematic diagram of a battery provided for some embodiments of the present application;

[0098] Fig.12 A schematic diagram of a third heat exchange element and a battery cell provided in some embodiments of the present application;

[0099] Fig.13 A partial schematic diagram of a battery provided for some embodiments of the present application;

[0100] Fig.14 For along Fig.13 Sectional view along line EE;

[0101] Fig.15 For along Fig.13 Sectional view along line FF;

[0102] Fig.16 For along Fig.13 Sectional view of the mid-GG line;

[0103] Fig.17 A partial cross-sectional view of a box provided in some embodiments of the present application;

[0104] Fig.18 For along Fig.13 A schematic diagram of the assembly process of the first heat exchanger at the cross-sectional position of the middle DD line;

[0105] Fig.19 for Fig.18 A partial enlarged view of the assembly process of the first heat exchange component;

[0106] Fig. 20 A partial schematic diagram of a battery provided for some embodiments of the present application;

[0107] Fig.21 for Fig. 20 A front view of the carrier shown in ;

[0108] Fig. 22 for Fig.21 A top view of the carrier shown in ;

[0109] Fig.23 For along Fig.21 Sectional view along the midline HH;

[0110] Fig.24 for Fig.21 A side view of the carrier shown in ;

[0111] Fig.25 A schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0112] Fig.26 A schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0113] Fig. 27 A schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0114] Fig.28 A schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0115] Fig.29A schematic diagram of a first heat exchange element provided in some embodiments of the present application.

[0116] Reference numerals:

[0117] Electric device 1000, controller 300, motor 400, battery 200, avoidance channel 200a, card hole 200d, battery cell 100, box assembly 1010, heat exchange assembly 1020, 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, second heat exchange element 103, third heat exchange element 104, expansion beam 105, first expansion Beam B1, second expansion beam B2, 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 106c, plate body 1061, mating portion 1062, first surface 1062a, second surface 1062b, hook portion 1063, Support portion 1064, heat insulation member 107, first heat insulation portion 1071, second heat insulation portion 1072, second mounting hole 1072a, first fixing member 1081, second fixing member 1082, gasket 1083, third expansion beam B3, pull rope 110, third fixing member 111, fourth fixing member 112, heat exchange tube 1, heat exchange flow channel 10, first heat exchange tube 1a, second heat exchange tube 1b, third heat exchange tube 1c, end portion 11, first end portion 11a, second end portion 11b, connecting section 12, U-shaped area 120, first heat exchange section 121, first heat exchange portion 1211, first bending portion 121 2. The 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, and the collector 2. DETAILED DESCRIPTION

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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 the various components in the embodiments of the present application shown in the drawings are only exemplary and should not constitute any limitation to the present application.

[0123] The term "plurality" used in the present application refers to two or more (including two).

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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 energy density and reliability.

[0130] In the related art, the battery uses a heat exchange component to achieve temperature control of the battery cell. However, the heat or cold loss of the heat exchange component is large, resulting in poor temperature control capability of the battery cell.

[0131] Based on the above considerations, in order to reduce the heat or cold loss of the heat exchange component, a battery is proposed, the battery comprising a box assembly, a battery cell and a heat exchange assembly, the box assembly comprising a box and an expansion beam, the expansion beam is arranged in the box, the battery cell is arranged in the box and abuts against the expansion beam, the heat exchange assembly comprises a first heat exchange element, the first heat exchange element is arranged in the box and located between the battery cell and the box, the first heat exchange element is used for heat exchange with the battery cell, and the first heat exchange element is spaced apart from the expansion beam so that the first heat exchange element and the expansion beam are thermally insulated.

[0132] In the above technical solution, the first heat exchange element and the expansion beam are spaced apart so as to be thermally insulated from each other, thereby reducing the heat exchange between the first heat exchange element and the expansion beam, reducing the amount of heat or cold transferred to the expansion beam by the first heat exchange element, and improving the temperature difference between the battery cells adjacent to the expansion beam and the battery cells at other positions, which is beneficial to improving the balanced temperature distribution inside the battery, and at the same time is beneficial to increasing the proportion of heat or cold transferred to the battery cells by the first heat exchange element, thereby improving the thermal management performance of the battery.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] Please refer to Figure 2 , Figure 2The 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 box body 101 and a plurality of battery cells 100, and the battery cells 100 are accommodated in the box body 101. Among them, the box body 101 is used to provide an assembly space for the battery cells, and the box body 101 can adopt a variety of structures. In some embodiments, the box body 101 may include a first box body 1011 and a second box body 1012, and the first box body 1011 and the second box body 1012 cover each other, and the first box body 1011 and the second box body 1012 jointly define a receiving cavity for accommodating the battery cells 100. The second box 1012 may be a hollow structure with one end open, and the first box 1011 may be a plate-like structure, and the first box 1011 covers the open side of the second box 1012, so that the first box 1011 and the second box 1012 jointly define a receiving cavity; or the first box 1011 and the second box 1012 may both be hollow structures with one end open (for example, Figure 2 As shown in FIG. 1 , 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.

[0137] 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.

[0138] Please refer to Figure 3 Any two of the first direction X1, the second direction X2 and the fifth direction X5 intersect, and further, any two of the first direction X1, the second direction X2 and the fifth direction X5 are perpendicular to each other.

[0139] Please refer to Figure 3-Figure 6In an embodiment of the present application, the battery 200 includes a box assembly 1010, a battery cell 100 and a heat exchange assembly 1020. The box assembly 1010 includes a box 101 and an expansion beam 105. The expansion beam 105 is disposed in the box 101, and the battery cell 100 is disposed in the box 101, and the battery cell 100 and the expansion beam 105 are stopped so that the expansion beam 105 is used to withstand the expansion force of the battery cell 100; the heat exchange assembly 1020 includes a first heat exchange element 102, the first heat exchange element 102 is disposed in the box 101, and the first heat exchange element 102 is located between the battery cell 100 and the box 101, and the first heat exchange element 102 is used for heat exchange with the battery cell 100, so as to realize temperature control of the battery cell 100 through the first heat exchange element 102.

[0140] Since the first heat exchange member 102 is disposed in the box body 101 and between the battery cell 100 and the box body 101, it is convenient to achieve good heat transfer between the first heat exchange member 102 and the battery cell 100, and at the same time, the first heat exchange member 102 will not be exposed outside the box body 101, which is convenient to achieve the sealing of the heat exchange tube 1. At this time, the first heat exchange member 102 can be disposed on any side of the battery cell 100; for example, at least one side of the upper side, lower side, left side, right side, front side and rear side of the battery cell 100 is provided with the first heat exchange member 102. In other words, for the box body 101, at least one of the top wall, bottom wall 1011a, left wall, right wall, front wall and rear wall of the box body 101 is provided with the first heat exchange member 102.

[0141] In the embodiment of the present application, there is no specific limitation on the fixing method of the first heat exchanger 102 and the housing 101. By way of example, the fixing method of the first heat exchanger 102 and the housing 101 includes, but is not limited to, bonding the first heat exchanger 102 and the housing 101, for example, the first heat exchanger 102 is bonded to the housing 101 by double-sided tape or structural tape.

[0142] Among them, the first heat exchanger 102 and the expansion beam 105 are spaced apart so that the first heat exchanger 102 and the expansion beam 105 are thermally insulated. It can be understood that the thermal resistance between the first heat exchanger 102 and the expansion beam 105 is greater than the thermal resistance between the first heat exchanger 102 and the battery cell 100, which is beneficial to reducing the heat or cold taken away from the first heat exchanger 102 by the expansion beam 105.

[0143] 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.

[0144] In the above technical solution, the first heat exchanger 102 and the expansion beam 105 are spaced apart so that the first heat exchanger 102 and the expansion beam 105 are thermally insulated, thereby improving the thermal resistance between the first heat exchanger 102 and the expansion beam 105, reducing the amount of heat or cold transferred from the first heat exchanger 102 to the expansion beam 105, and reducing the loss of heat or cold. At the same time, it is beneficial to reduce the temperature difference between the expansion beam 105 and the peripheral battery cell 100 abutting against it, thereby improving the heat exchange between the adjacent expansion beam 105 and the expansion beam 105. The temperature difference between the battery cells 100 of the expansion beam 105 and the battery cells 100 at other positions is conducive to improving the consistency of the heat exchange environment between the peripheral battery cells 100 and the internal battery cells 100, thereby helping to reduce the temperature difference between the peripheral battery cells 100 and the internal battery cells 100, and helping to improve the internal temperature distribution of the battery 200 and improve the reliability of the battery 200; in addition, it is conducive to increasing the proportion of heat or cold transferred to the battery cell 100 by the first heat exchange component 102, which is beneficial to improving the thermal management performance of the battery 200.

[0145] It is understandable that the first heat exchange member 102 and the expansion beam 105 can be always spaced apart during the entire life cycle of the battery 200. In addition, when the box body 101 has a top wall, a bottom wall 1011a and a surrounding wall, the first heat exchange member 102 is provided between at least one of the top wall, the bottom wall 1011a and the surrounding wall and the battery cell 100; the surrounding wall may include a plurality of side walls connected end to end in sequence, and the first heat exchange member 102 on the surrounding wall may be provided between at least one side wall and the battery cell 100.

[0146] Please refer to Fig.11 and Fig.12In some embodiments, the heat exchange assembly 1020 further includes at least one of a second heat exchange element 103 and a third heat exchange element 104 , the second heat exchange element 103 is disposed outside the box body 101 , and the third heat exchange element 104 is disposed between two adjacent battery cells 100 .

[0147] When the heat exchange component 1020 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 simplifies the insulation design of the second heat exchange element 103, facilitates the simplification of the setting of the battery 200, reduces the processing difficulty and production cost, and the second heat exchange element 103 does 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 heat exchange component 1020 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.

[0148] 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.

[0149] In the above technical solution, by setting the heat exchange component 1020 to include at least one of the second heat exchange component 103 and the third heat exchange component 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.

[0150] Please refer to Figure 4 and Figure 6 In some embodiments, the battery 200 further includes a heat insulating member 107, and the heat insulating member 107 is disposed between the first heat exchange member 102 and the expansion beam 105. In this solution, whether the expansion beam 105 can form an avoidance channel 200a with the box body 101 is not specifically limited.

[0151] In the above technical solution, by arranging a heat insulating member 107 between the first heat exchange member 102 and the expansion beam 105 , it is beneficial to further increase the thermal resistance between the first heat exchange member 102 and the expansion beam 105 , and to further reduce the heat exchange amount between the first heat exchange member 102 and the expansion beam 105 .

[0152] Of course, in other embodiments of the present application, the heat insulating member 107 may not be provided between the first heat exchange member 102 and the expansion beam 105. For example, heat insulation can be achieved between the expansion beam 105 and the first heat exchange member 102 by air, and / or when the first heat exchange member 102 is bonded to the box body 101 by structural adhesive, the structural adhesive will overflow to the side of the first heat exchange member 102 facing the expansion beam 105. The structural adhesive has a certain heat insulating ability and can also increase the thermal resistance between the first heat exchange member 102 and the expansion beam 105.

[0153] Please refer to Figure 4-Figure 6 In some embodiments, there are multiple expansion beams 105, one of which divides the internal space of the box body 101 into a first cavity 101a and a second cavity 101b. A portion of the first heat exchanger 102 and the battery cell 100 are both arranged in the first cavity 101a, and the portion of the first heat exchanger 102 located in the first cavity 101a is used for heat exchange with the battery cell 100; at least one avoidance channel 200a is formed between the expansion beam 105 and the box body 101, and a portion of the surface of the expansion beam 105 defines a portion of the wall surface of the avoidance channel 200a, and a portion of the surface of the box body 101 defines a portion of the wall surface of the avoidance channel 200a. Among them, the first heat exchanger 102 is arranged in the 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 expansion beam 105 corresponding to the avoidance channel 100a is spaced from the first heat exchanger 102.

[0154] It can be understood that there is one expansion beam 105, which divides the internal space of the box body 101 into a first cavity 101a and a second cavity 101b; or, there are multiple expansion beams 105, and one of the multiple expansion beams 105 divides the internal space of the box body 101 into a first cavity 101a and a second cavity 101b.

[0155] In the above technical solution, at least one avoidance channel 200a is formed between the expansion beam 105 and the box body 101, and the first heat exchanger 102 is arranged in the corresponding avoidance channel 200a, so that the first heat exchanger 102 extends from the first cavity 101a to the second cavity 101b, which facilitates the assembly of the first heat exchanger 102 and the expansion beam 105, and facilitates the first heat exchanger 102 to extend to the second cavity 101b without bending around the expansion beam 105, which is conducive to simplifying the structure of the first heat exchanger 102; at the same time, the arrangement of the above avoidance channel 200a can make the interface of the first heat exchanger 102 located in the second cavity 101b, that is, the interface of the first heat exchanger 102 and the battery cell 100 are separated. The expansion beam 105 is located in different cavities, so that the box body 101 can provide a suitable layout space for the connection between the first heat exchanger 102 and other components. At the same time, the expansion beam 105 can separate the interface of the first heat exchanger 102 from the battery cell 100, which is beneficial to reduce the impact of the heat exchange medium leakage at the interface of the first heat exchanger 102 on the battery cell 100, and is convenient to improve the reliability of the use of the battery cell 100; and the wall surface of the expansion beam 105 corresponding to the avoidance channel 200a is spaced apart from the first heat exchanger 102, which is convenient for realizing the heat insulation setting of the first heat exchanger 102 and the expansion beam 105 under the premise that the first heat exchanger 102 passes through from one side of the expansion beam 105 to the other side of the expansion beam 105.

[0156] It can be understood that when there are multiple expansion beams 105, except for the expansion beam 105 that divides the internal space of the box body 101 into the first cavity 101a and the second cavity 101b, the remaining expansion beams 105 may or may not have an avoidance channel 200a formed between them and the box body 101. For example, the first expansion beam B1 described later divides the internal space of the box body 101 into the first cavity 101a and the second cavity 101b, the third expansion beam B3 described later is arranged in the first cavity 101a and also has an avoidance channel 200a formed between it and the box body 101, and the second expansion beam B2 described later is arranged in the first cavity 101a and does not have an avoidance channel 200a formed between it and the box body 101. The entire first heat exchange element 102 is located on one side of the width of the above-mentioned second expansion beam B2, and the first heat exchange element 102 and the above-mentioned second expansion beam B2 are also spaced apart to achieve a heat insulation setting. It can be seen that no matter whether the avoidance channel 200a is formed between the expansion beam 105 and the box body 101, the first heat exchange element 102 is spaced apart from the expansion beam 105 to achieve heat insulation.

[0157] In some embodiments, the first cavity 101a may be provided with other components in addition to the battery cell 100. For example, the first expansion beam B1 divides the internal space of the box body 101 into the first cavity 101a and the second cavity 101b, 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 expansion 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.

[0158] Please refer to Figure 6 and Fig.19 In some embodiments, the expansion 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 avoidance channel 200a. For example, the expansion beam 105 has a first recess 105a, the wall of the box body 101 is not provided with the second recess 101c, and only the first recess 105a forms an avoidance channel 200a; or, the expansion beam 105 is not provided with the first recess 105a, the wall of the box body 101 has the second recess 101c, and only the second recess 101c forms an avoidance channel 200a; or, the expansion beam 105 has a first recess 105a, the wall of the box body 101 has the second recess 101c, and the first recess 105a and the second recess 101c cooperate to form an avoidance channel 200a.

[0159] In the above solution, the wall of the box body 101 can be understood as the wall of the box body 101 corresponding to the first heat exchange element 102 . For example, a first heat exchange component 102 is provided between the bottom wall 1011a of the box body 101 and the battery cell 100, and at least one avoidance channel 200a is formed between the bottom wall 1011a of the box body 101 and the expansion beam 105, and the first heat exchange component 102 is arranged in the corresponding avoidance channel 200a; for another example, a first heat exchange component 102 is provided between the top wall of the box body 101 and the battery cell 100, and an avoidance channel 200a is formed between the top wall of the box body 101 and the expansion beam 105, and the first heat exchange component 102 is arranged in the corresponding avoidance channel 200a; for another example, a first heat exchange component 102 is provided between the side wall of the box body 101 and the battery cell 100, and an avoidance channel 200a is formed between the side wall of the box body 101 and the expansion beam 105, and the first heat exchange component 102 is arranged in the corresponding avoidance channel 200a.

[0160] In the above solution, the wall of the box body 101 can be understood as the wall of the box body 101 corresponding to the first heat exchange element 102 . For example, a first heat exchange component 102 is provided between the bottom wall 1011a of the box body 101 and the battery cell 100, and an avoidance channel 200a is formed between the bottom wall 1011a of the box body 101 and the expansion beam 105, and the first heat exchange component 102 is provided in the corresponding one or more avoidance channels 200a; for another example, a first heat exchange component 102 is provided between the top wall of the box body 101 and the battery cell 100, and an avoidance channel 200a is formed between the top wall of the box body 101 and the expansion beam 105, and the first heat exchange component 102 is provided in the corresponding one or more avoidance channels 200a; for another example, a first heat exchange component 102 is provided between the side wall of the box body 101 and the battery cell 100, and an avoidance channel 200a is formed between the side wall of the box body 101 and the expansion beam 105, and the first heat exchange component 102 is provided in the corresponding one or more avoidance channels 200a. It can be seen that the first heat exchange element 102 and the corresponding avoidance channel 200a can be located on the same side of the battery cell 100 to facilitate the installation and assembly of the first heat exchange element 102. The first heat exchange element 102 can correspond to one or more avoidance channels 200a.

[0161] In the above technical solution, the avoidance channel 200a is constructed by setting the first recess 105a and / or the second recess 101c, which facilitates the molding of the avoidance channel 200a and facilitates the avoidance channel 200a to have a suitable cross-sectional area that can accommodate the penetration part of the first heat exchanger 102 according to needs, so that on the premise of achieving smooth penetration of the first heat exchanger 102, the cross-sectional area of ​​the avoidance channel 200a can be appropriately reduced, which is beneficial to reducing the molding difficulty of the avoidance channel 200a and / or reducing the weakening of the expansion beam 105.

[0162] Please refer to Fig.18 and Fig.19 In some embodiments, the portions of the first heat exchange element 102 located on opposite sides of the expansion beam 105 are connected at an obtuse angle, that is, the angle α between the portions of the first heat exchange element 102 located on opposite sides of the expansion beam 105 is an obtuse angle.

[0163] In the above technical solution, the parts of the first heat exchanger 102 located on the opposite sides of the expansion beam 105 are connected at an obtuse angle, so that during the assembly process of the first heat exchanger 102, the penetrating part of the first heat exchanger 102 is first aligned with the avoidance channel 200a. At this time, the first heat exchanger 102 is roughly inclined. As the first heat exchanger 102 is penetrated, the inclination angle of the first heat exchanger 102 gradually decreases until the first heat exchanger 102 is completely penetrated. At this time, most of the first heat exchanger 102 is in contact with the corresponding wall of the box body 101, which facilitates the penetration of the first heat exchanger 102 and is conducive to improving the installation convenience of the first heat exchanger 102.

[0164] It can be seen that the above scheme is particularly suitable for assembling the first heat exchanger 102 onto the box body 101 after the expansion beam 105 and the box body 101 are assembled; for example, after the expansion beam 105 and the box body 101 are welded, the expansion beam 105 and the box body 101 are electrophoresed together, and the first heat exchanger 102 is installed after the electrophoresis is completed. Of course, in other embodiments of the present application, the first heat exchanger 102 can also be assembled onto the box body 101 first, and then the expansion beam 105 and the box body 101 are assembled.

[0165] Of course, in other embodiments, the angle α can also be a flat angle, such as Fig.10 shown.

[0166] Please refer to Figure 7 In some embodiments, the first heat exchange member 102 includes a heat exchange tube 1 and a current collector 2. A heat exchange channel 10 is defined in the heat exchange tube 1. The end 11 of the heat exchange channel 10 is arranged in the corresponding avoidance channel 200a. The current collector 2 corresponds to the avoidance channel 200a one by one. The current collector 2 is connected to the end 11 of the heat exchange channel 10, and the current collector 2 is arranged in the second cavity 101b. For example, the current collector 2 can be connected to multiple ends 11 arranged in the corresponding avoidance channel 200a. The multiple ends 11 can belong to the same heat exchange tube 1 or different heat exchange tubes 1. The heat exchange channel 10 has two ends 11. When one of the two ends 11 is used for liquid inlet, the other is used for liquid outlet. The two ends 11 of the same heat exchange channel 10 can be arranged in the same avoidance channel 200a or in different avoidance channels 200a.

[0167] The current collector 2 is connected to the interfaces of the multiple ends 11 of the corresponding avoidance channel 200a, or the current collector 2 separates the interfaces of the multiple ends 11 of the corresponding avoidance channel 200a into multiple independent flow channels. For example, the multiple ends 11 penetrating the avoidance channel 200a are all used for liquid inlet or liquid outlet, and the current collector 2 is connected to the interfaces of the multiple ends 11 of the avoidance channel 200a, so that the medium in the current collector 2 is distributed to the multiple ends 11, or the medium flowing out from the multiple ends 11 is gathered in the current collector 2; when at least one of the multiple ends 11 penetrating the avoidance channel 200a is used for liquid inlet and at least one of the other ends is used for liquid outlet, the current collector 2 separates the interfaces of the multiple ends 11 of the avoidance channel 200a into multiple independent flow channels, at least one flow channel is used to provide the medium to the end 11, and at least one of the other flow channels is used to collect the medium flowing out from the end 11.

[0168] For example, Figure 4As shown, when there is one heat exchange tube 1, there is one current collector 2, and the two ends 11 of the heat exchange channel 10 are respectively connected to the current collector 2. At this time, two independent flow channels are defined in the current collector 2, and the two flow channels are respectively connected to the two ends 11 of the heat exchange channel 10; or, when there are multiple heat exchange tubes 2, there is one current collector 2, and the two ends 11 of each heat exchange channel 10 are respectively connected to the current collector 2, and two independent flow channels are also defined in the current collector 2, one of which is connected to one end 11 of each heat exchange channel 10, and the other is connected to the other end of each heat exchange channel 10. At this time, multiple heat exchange channels 10 are arranged in parallel; or, as Figure 7 As shown, there are multiple heat exchange tubes 2 and two current collectors 2, the ends 11 for liquid inlet of all heat exchange channels 10 are connected to one of the current collectors 2, and the ends 11 for liquid outlet of all heat exchange channels 10 are connected to the other current collector 2; or, there are multiple heat exchange tubes 2 and two current collectors 2, the two ends 11 of the heat exchange channels 10 are respectively a first end 11a and a second end 11b, the first end 11a is used for liquid inlet, and the second end 11b is used for liquid outlet, the first end 11a of at least one heat exchange channel 10 and the second end 11b of at least one heat exchange channel 10 are both connected to one of the current collectors 2, and the second end 11b of at least one heat exchange channel 10 and the first end 11a of at least one heat exchange channel 10 both extend to the other current collector 2.

[0169] In the above technical solution, by setting the first heat exchange component 102 to include a heat exchange tube 1 and a collector 2, it is convenient to flexibly set the first heat exchange component 102 by adjusting at least one of the number of heat exchange tubes 1 and the number of collectors 2; at the same time, the setting of the collector 2 makes it easy to improve the overall structural stability and reliability of the first heat exchange component 102 while ensuring the normal circulation of the medium in each heat exchange tube 1.

[0170] Of course, in other embodiments of the present application, the first heat exchange element 102 may also include the heat exchange tube 1 instead of the current collector 2.

[0171] Please refer to Fig.18 and Fig.19 In some embodiments, the avoidance channel 200a is configured to allow the corresponding current collector 2 to pass through; for example, after the expansion beam 105 and the box body 101 are assembled, an avoidance channel 200a is formed between the expansion beam 105 and the box body 101. When the first heat exchange component 102 is assembled, the current collector 2 can move from the side of the expansion beam 105 corresponding to the first cavity 101a to the side of the expansion beam 105 corresponding to the second cavity 101b through the avoidance channel 200a.

[0172] It can be understood that in the above scheme, the heat exchange tube 1 and the current collector 2 can be fixedly connected, and after the expansion beam 105 and the box body 101 are assembled, the structure connecting the heat exchange tube 1 and the current collector 2 is assembled to the box body 101; obviously, the above installation makes it easy for the box body 101 and the expansion beam 105 to limit the operating space when the heat exchange tube 1 and the current collector 2 are connected (for example, the heat exchange tube 1 and the current collector 2 are welded), which is beneficial to improving the connection convenience between the heat exchange tube 1 and the current collector 2.

[0173] In the above technical solution, the avoidance channel 200a is configured to allow the corresponding current collector 2 to pass through, so as to provide sufficient operating space when connecting the heat exchange tube 1 and the current collector 2, thereby facilitating the connection operation of the heat exchange tube 1 and the current collector 2.

[0174] Please combine Figure 8 and Fig. 9 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 channel 200a, and the part of the first heat exchange member 102 that passes through the avoidance channel 200a is arranged in the second recess 101c. The expansion beam 105 is in contact with the wall of the box body 101 except the second recess 101c; or, the expansion beam 105 is spaced apart from the wall of the box body 101 except the second recess 101c.

[0175] In the above technical solution, the expansion beam 105 is arranged to fit with the wall of the box body 101 except the second recessed portion 101c. For the expansion beam 105 and the above wall of the box body 101, the expansion 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 expansion beam 105 is separated from the second recessed portion 101c, so as to achieve heat insulation between the expansion beam 105 and the first heat exchanger 102 while avoiding the first heat exchanger 102. At the position where the first heat exchanger 102 is not penetrated, the expansion beam 105 fits with the wall of the box body 101, that is, the expansion beam 105 is 05 is zero contact with the wall of the box body 101, which is convenient for increasing the matching area between the expansion beam 105 and the box body 101, and is beneficial to improving the installation reliability of the expansion beam 105; by arranging the expansion beam 105 and the wall of the box body 101 except for the second recess 101c, it is beneficial to further increase the interval between the entire expansion beam 105 and the first heat exchanger 102, which is convenient for improving the thermal resistance between the entire expansion beam 105 and the first heat exchanger 102, reducing the heat or cold transferred from the first heat exchanger 102 to the expansion beam 105, and facilitating improving the energy utilization rate of the first heat exchanger 102.

[0176] Please refer to Figure 8 and Fig. 9In some embodiments, the battery 200 further includes a third expansion beam B3, which is disposed in the first cavity 101a, and the battery cells 100 are disposed on opposite sides of the third expansion beam B3, respectively. The portion of the first heat exchange element 102 located in the first cavity 101a is passed through the avoidance space between the third expansion beam B3 and the box body 101, so that a portion of the first heat exchange element 102 is disposed on opposite sides of the third expansion beam B3. The first heat exchange element 102 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.

[0177] Optionally, the box body 101 is formed with a third recess 101d, and / or the third expansion beam B3 is formed with a fourth recess, and the third recess 101d and / or the fourth recess construct an escape space.

[0178] Exemplarily, a third recess 101d is formed on the wall of the box body 101, and the third recess 101d forms at least part of the avoidance space, and the part of the first heat exchanger 102 that penetrates the avoidance space is arranged in the third recess 101d. The third expansion beam B3 is in contact with the part of the wall of the box body 101 except the third recess 101d; or, the third expansion beam B3 is spaced apart from the part of the wall of the box body 101 except the third recess 101d.

[0179] Please refer to Figure 6 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 of the expansion beam 105 corresponding to the avoidance channel 200a and the first heat exchange member 102 to fill at least a portion of the gap between the wall of the expansion beam 105 corresponding to the avoidance channel 200a and the first heat exchange member 102.

[0180] In the above technical solution, by arranging the first heat insulation part 1071 between the wall of the expansion beam 105 corresponding to the avoidance channel 200a 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 expansion beam 105 and the first heat exchange component 102 through the heat insulation component 107.

[0181] Of course, in other embodiments of the present application, the heat insulating member 107 may not be provided. In this case, heat insulation can be achieved between the expansion beam 105 and the first heat exchange member 102 by air, and / or, when the first heat exchange member 102 is bonded to the box body 101 by structural adhesive, the structural adhesive will overflow to the side of the first heat exchange member 102 facing the expansion beam 105. The structural adhesive has a certain heat insulating ability and can also increase the thermal resistance between the first heat exchange member 102 and the expansion beam 105.

[0182] Please refer to Figure 6In some embodiments, the thermal insulation member 107 further includes a second thermal insulation portion 1072 , and the second thermal insulation portion 1072 is disposed between a portion of the wall of the box body 101 excluding the second recess 101 c and the expansion beam 105 .

[0183] It is understandable that the second recess 101c can be used to accommodate at least one end 11 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 channel 200a, each second recess 101a accommodates one end 11, 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 expansion beam 105.

[0184] In the above scheme, by arranging the second insulation part 1072 between the wall of the box body 101 except the second recess 101c and the expansion beam 105, it is convenient to sandwich the insulation member 107 between the box body 101 and the expansion beam 105, and to realize the reliable installation of the insulation member 107 by fixing the expansion beam 105 to the box body 101, so that the insulation member 107 can provide a relatively flat mating surface for the connection between the box body 101 and the expansion beam 105, and at the same time it is beneficial to reduce the depth of the second recess 101c and improve the molding convenience of the second recess 101c.

[0185] Please refer to Figure 6 In some embodiments, a first fixing member 1081 is further provided on the expansion beam 1050, and at least a portion of the first fixing member 1081 is located inside the expansion beam 1050; the battery 200 also includes a second fixing member 1082, which passes through the box body 101, the second heat insulation part 1072 and the expansion beam 105, and the second fixing member 1082 is connected to the first fixing member 1081.

[0186] In the above technical solution, at least part of the first fixing member 1081 is arranged to be located inside the expansion beam 105, and the second fixing member 1082 is arranged through the box body 101, the second heat insulation part 1072 and the expansion beam 105 and connected to the first fixing member 1081, so that the box body 101, the heat insulation member 107 and the expansion 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 along the direction of the heat insulation member 107 toward the expansion 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.

[0187] 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 1011d, the second heat insulation portion 1072 is formed with a second mounting hole 1072a, the expansion beam 105 is formed with a third mounting hole 105c, the head of the first fixing member 1081 is matched in the second mounting hole 1072a, the first fixing member 1081 is penetrated in the third mounting hole 105c so that part of the first fixing member 1081 extends into the expansion beam 105, and the second The fixing member 1082 is passed through the first mounting hole 1011d and cooperates with the partial thread of the first fixing member 1081 or even the expansion beam 105, so that the above-mentioned part of the first fixing member 1081 is deformed to be riveted on the expansion beam 105, and the first fixing member 1081 and the second fixing member 1082 are threadedly connected at the same time; it can be understood that the above-mentioned arrangement can achieve the sealing of the opening position of the box body 101 through 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.

[0188] It can be understood that the above-mentioned embodiments of the present application regarding the insulation setting of the expansion beam 105 that divides the internal space of the box body 101 into the first cavity 101a and the second cavity 101b are applicable to other expansion beams of the battery 200.

[0189] For example, the first expansion beam B1 divides the internal space of the box body 101 into a first chamber 101a and a second chamber 101b, and the battery 200 also includes a second expansion beam B2, which is arranged in the first chamber 101a, and all battery cells 100 are sandwiched between the first expansion beam B1 and the second expansion beam B2. In the direction from the first chamber 101a to the second chamber 101b, the first heat exchange element 102 and the second expansion beam B2 are spaced apart to achieve a heat insulation arrangement 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 chamber 101b; it can be understood that a heat insulating element 107 may or may not be arranged between the second expansion beam B2 and the wall of the box body 101 where the first heat exchange element 102 is arranged.

[0190] For another example, the battery 200 further includes a second expansion beam B2 and a third expansion beam B3, the second expansion beam B2 and the third expansion beam B3 are both disposed in the first cavity 101a, the third expansion beam B3 is located between the first expansion beam B1 and the second expansion beam B2, a battery cell 100 is disposed between the first expansion beam B1 and the third expansion beam B3, and a battery cell 100 is also disposed between the second expansion beam B2 and the third expansion beam B3, then a portion of the first heat exchange element 102 is disposed on opposite sides of the third expansion beam B3, and at this time, the third expansion beam B 3 and the box body 101, and the avoidance channel is connected to the above-mentioned opposite sides of the third expansion beam B3. For example, the box body 101 is formed with a third recess 101d, and / or the third expansion beam B3 is formed with a fourth recess, and the third recess 101d and / or the fourth recess constitute the 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 from the third expansion beam B3, so that the first heat exchange element 102 and the third expansion beam B3 are thermally insulated.

[0191] 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 expansion 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.

[0192] Please refer to Fig.15 , Fig.16 and Fig. 20 In some embodiments, the expansion beam 105 has a first recess 105a, the first recess 105a is configured as at least part of the avoidance channel 200a, the expansion beam 105 also has a first mating surface 105b that abuts against the battery cell 100, the box assembly 1010 also includes a carrier 106, the carrier 106 is disposed in the avoidance channel 200a, and the carrier 106 has a second mating surface 106a that abuts against the battery cell 100, and the first mating surface 105b is abutted against the second mating surface 106a. The mating surface 106a is arranged flush, for example, the first mating surface 105b and the second mating surface 106a can be located in the same plane; the supporting member 106 has a groove 106b for avoiding the first heat exchange member 102, and the groove 106b runs through the outer peripheral side of the supporting member 106. The groove 106b can avoid the part of the first heat exchange member 102 that passes through the corresponding avoidance channel 200a, so as to facilitate the smooth installation of the supporting member 106 after the first heat exchange member 102 is installed.

[0193] It is understandable that the first mating surface 105b can directly contact the battery cell 100, or the first mating surface 105b can indirectly stop the battery cell 100; similarly, the second mating surface 106a can directly contact the battery cell 100, or the second mating surface 106a can indirectly stop the battery cell 100.

[0194] Exemplarily, 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, each heat exchange channel 10 has two ends 11, the portion of the first heat exchange element 102 that passes through the corresponding avoidance channel 200a corresponds to multiple ends 11, the support member 106 corresponds one-to-one to the avoidance channel 200a, and at least one groove 106b is formed on the support member 106, and the groove 106b is used to avoid one or more ends 11.

[0195] In the above technical solution, by arranging the supporting member 106 in the avoidance channel 200a and making the second mating surface 106a flush with the first mating surface 105b, the supporting member 106 can bear the expansion force of the battery cell 100 together with the expansion beam 105, which is beneficial to reducing the risk of lithium precipitation caused by excessive deformation difference between the battery cell 100 at the position of the avoidance channel 200a and other positions, and is also beneficial to reducing the risk of the battery cell 100 ruptured due to uneven force and electrolyte leakage, thereby improving the reliability of the battery 200.

[0196] For example, the groove 106b can be located on the side of the wall of the supporting member 106 that is away from the expansion beam 105 and corresponds to the avoidance channel 200a, and the side of the groove 106b that is away from the expansion beam 105 is open; for example, the first heat exchange element 102 is arranged on the bottom wall 1011a of the box body 101, the expansion beam 105 is arranged on the upper side of the bottom wall 1011a, and the lower side of the groove 106b is open. At this time, the supporting member 106 can separate the first heat exchange element 102 and the expansion beam 105 so as to increase the thermal resistance between the first heat exchange element 102 and the expansion beam 105, which is beneficial to reduce the heat or cold transferred from the first heat exchange element 102 to the expansion beam 105.

[0197] Please refer to Fig.14 and Fig.15 In some embodiments, at least one of the expansion beam 105 and the box body 101 is formed with a stopper 106c, and the stopper 106c is abutted against the bearing member 106 to limit the movement of the bearing member 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 bearing member 106, or the stopper 106c is abutted against the bearing member 106 indirectly.

[0198] In the above technical solution, a stopper 106c is formed on at least one of the expansion beam 105 and the box body 101 to limit the movement of the bearing member 106 in the direction from the first cavity 101a to the second cavity 101b, so as to realize the bearing member 106 in the width direction of the expansion beam 105 (for example, Figure 3 The second direction X2) in the expansion beam 105 can be reliably limited, and the stopper 106c can resist the expansion force exerted by the battery cell 100 on the support member 106, which is beneficial to improving the carrying capacity of the support member 106, so that the support member 106 can stably withstand the expansion force of the battery cell 100, and reduce the probability of the support member 106 moving toward the second cavity 101b under the action of the battery cell 100; and if at least one of the expansion beam 105 and the box body 101 is connected and fixed to the support member 106 by other means, such as at least one of the expansion beam 105 and the box body 101 is bonded to the support member 106, the above scheme is beneficial to reduce the force borne by other connection methods between at least one of the expansion beam 105 and the box body 101 and the support member 106, and is beneficial to improving the setting reliability and stability of the support member 106.

[0199] Please refer to Fig.14 and Fig.16 In some embodiments, a stop portion 106c is formed on one side of the expansion beam 105 facing the first cavity at the position of the avoidance channel, that is, the end of the portion of the expansion beam 105 corresponding to the avoidance channel 200a facing the first cavity 101a is formed as the stop portion 106c; and / or, a wall of the box body 101 where the first heat exchange element 102 is arranged is formed with a stop step 1011c protruding toward the expansion beam 105, and the stop step 1011c is formed as the stop portion 106c.

[0200] For example, Fig.14 As shown, the expansion beam 105 has a first concave portion 105a, and at least part of the edge portion of the first concave portion 105a corresponding to the side where the first cavity 101a is located is formed as a stopper 106c; and / or, as Fig.16 As shown, the wall of the box body 101 has a second recess 101c, and a stop step 1011c is formed on the bottom wall of the second recess 101c.

[0201] In the above technical solution, a stopper 106c is formed at the position of the avoidance space 200a on one side of the expansion beam 105 facing the first cavity 101a, so that the stopper 106c is limited by the structure of the expansion beam 105 itself to realize the limiting of the support member 106, and no separate setting is required, which is conducive to simplifying the structure of the expansion beam 105. At the same time, the stopper 106c is located on the side of the expansion beam 105 facing the first cavity 101a, so that it is convenient to cooperate with the support member 106 "in the direction from the first cavity 101a to the second cavity 101b in the avoidance channel 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 expansion 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.

[0202] Exemplarily, the first recess 105a of the expansion beam 105 constructs at least a portion of the avoidance channel 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 expansion beam 105 and the support member 106, and facilitates further improving 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.

[0203] Please refer to Fig.14 In some embodiments, in the cross section of the expansion beam 105, the stopper 106c on the expansion beam 105 is formed as an arc structure, and the cross section of the expansion beam 105 is parallel to the length direction of the expansion beam 105 (for example Figure 3 The first direction X1) is perpendicular to the axial direction.

[0204] In the above technical solution, the stopper 106c on the expansion beam 105 is formed into an arc structure on the cross section of the expansion beam 105, so that under the premise that the stopper 106c can limit the movement of the bearing member 106, the part of the bearing member 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 expansion beam 105 facing the first cavity 101a, it is convenient to improve the bearing member 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 expansion beam 105 corresponding to the stopper 106c is an integrally formed bending 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 bending plate, which is conducive to saving the processing steps of the expansion beam 105, reducing the processing difficulty, and improving production efficiency.

[0205] Please refer to Fig.14 , Fig.15 and Figure 21-24 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 expansion 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 expansion beam 105.

[0206] 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 expansion beam 105, if the expansion 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 expansion 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.

[0207] 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 matched with the stop portion 106c on the box body 101; of course, when the supporting member 106 also includes the supporting portion 1064 described below, the stop portion 106c on the box body 101 can be matched with the supporting portion 106c.

[0208] Please refer to Fig.14 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 expansion 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, for example, the second surface 1062b and the second mating surface 106a are located in the same plane.

[0209] In the above technical solution, the first surface 1062a of the mating portion 1062 is arranged to be in abutment with the expansion 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 expansion 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.

[0210] Exemplarily, the first surface 1062 a of the matching portion 1062 is abutted against the stop portion 106 c of the expansion beam 105 , and in the cross section of the expansion beam 105 , the first surface 1062 a and the stop portion 106 c are both formed into an arc shape.

[0211] Please refer to Fig.15 In some embodiments, at least one latch hole 200d is formed on the expansion beam 105, and the carrier 106 also includes at least one hook portion 1063. The hook portion 1063 is formed at the outer edge of the plate body 1061 and is located on the side of the plate body 1061 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 are located on the same side of the plate body 1061, and both are located on the side of the plate body 1061 facing the expansion beam 105.

[0212] Exemplarily, the first heat exchange member 102 is arranged on the bottom wall 1011a of the box body 101, the expansion 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 expansion beam 105 corresponding to the avoidance space 200a, and a portion of the hook portion 1063 extends upward into the card hole 200d.

[0213] In the above technical solution, by setting the hook portion 1063 of the supporting member 106 to be clamped in the clamping hole 200d on the expansion beam 105, it is convenient to realize the movement of the supporting member 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 supporting member 106 and improve the problem that the supporting member 106 is easy to leave the avoidance channel along the direction from the second cavity 101b to the first cavity 101a during the assembly process of the battery 200. For example, the above setting can realize the pre-limitation of the supporting member 106, which is beneficial to further improve the assembly efficiency of the battery 200.

[0214] 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 expansion beam 105, so as to improve the reliability of the pre-limiting of the bearing member 106.

[0215] 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 member 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 expansion beam 105, and the supporting member 106 continues to move toward the second cavity 101b until the hook portion 1063 is hooked in the hook hole 200d.

[0216] Please refer to Fig.15 , Figure 21-24 In some embodiments, the carrier 106 further includes at least one supporting portion 1064, which is disposed on a side of the plate body 1061 that is away from the second mating surface 106a, and the supporting portion 1064 is disposed to avoid the first heat exchange member 102, and the supporting portion 1064 can be spaced apart from the groove 106b, and the supporting portion 1064 is stop-fitted with the box body 101.

[0217] The support portion 1064 is arranged to avoid the first heat exchange member 102, which can be understood as that, 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 groove wall of the groove 106b. Exemplarily, the matching portion 1062 is abutted against the stopper 106c of the expansion beam 105, and the support portion 1064 is abutted against the box body 101 (for example, the stopper 106c on the box body 101 mentioned above).

[0218] In the above embodiment, by providing 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 expansion 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 first heat exchange component 102, so that the convenient assembly of the carrier 106 is convenient.

[0219] 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 fifth direction X5 in the figure, the fifth direction X5 may be the height direction of the battery cell 100), that is, the normal direction of the wall of the box body 101 where the first heat exchange member 102 is disposed, and the stop fit; 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 expansion 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 first direction X1, and the support portion 1064 can be abutted with 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 fifth direction X5. The first direction and the second direction intersect with the fifth direction respectively, and illustratively, the first direction, the second direction and the fifth direction are perpendicular to each other.

[0220] Exemplarily, there are multiple support portions 1064, and each slot 106b is located in the length direction of the expansion beam 105 (for example Figure 1At least one supporting portion 1064 is respectively provided on both sides in the first direction X1).

[0221] Please refer to the figure. 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. Then, 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 set is the largest, and the width of the support portion 1064 at one end facing the matching portion 1062 is the smallest.

[0222] Exemplarily, the first heat exchanger 102 is arranged between the bottom wall 1011a of the box body 101 and the battery cell 100, the expansion 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.

[0223] 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.

[0224] Exemplarily, when the supporting member 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 positioning of the supporting member 106 in the width direction of the expansion beam 105, the rotation of the supporting member 106 can also be restricted, which is beneficial to improving the stability of the supporting member 106 against the battery cell 100.

[0225] In some embodiments, the bearing member 106 is disposed between the first heat exchange member 102 and the expansion beam 105, so that the first heat exchange member 102 and the expansion beam 105 are separated by the bearing member 106, and at this time, the side of 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 expansion beam 105; and / or the bearing member 106 is spaced apart from the first heat exchange member 102, so as to achieve a heat insulation setting between the bearing member 106 and the first heat exchange member 102.

[0226] Exemplarily, the first heat exchanger 102 is disposed on the bottom wall 1011a of the box body 101, the expansion beam 105 is disposed on the upper side of the bottom wall 1011a of the box body 101, the supporting member 106 is disposed in the avoidance space 200a, the lower side of the groove 106b is open, and the first heat exchanger 102 is passed through the groove 106b. The supporting member 106 can separate the part of the first heat exchanger 102 passing through the expansion beam 105 from the expansion beam 105.

[0227] In the above technical solution, the carrier 106 is arranged between the first heat exchanger 102 and the expansion beam 105, and at the same time, the thermal conductivity of the carrier 106 is lower than the thermal conductivity of the expansion beam 105, and / or the carrier 106 and the first heat exchanger 102 are arranged at intervals, which is beneficial to increase the thermal resistance between the first heat exchanger 102 and the expansion beam 105, and reduce the heat exchange between the expansion beam and the first heat exchanger 102, which is beneficial to increase the proportion of heat or cold transferred from the first heat exchanger 102 to the battery cell 100 to a certain extent, and improve the thermal management performance; in addition, when the carrier 106 and the first heat exchanger 102 are arranged at intervals, the risk of interference between the carrier 106 and the first heat exchanger 102 can be reduced when the carrier 106 is assembled, thereby improving the installation convenience of the carrier 106.

[0228] In some embodiments, the strength of the material of the bearing member 106 is at least 0.8 times the strength of the material of the expansion beam 105. For example, the strength of the material of the bearing member 106 is 0.8 times, 0.85 times, 0.9 times, 1 times, etc. the strength of the material of the expansion beam 105.

[0229] Optionally, the material of the bearing member 106 and the material of the expansion beam 105 may be the same or different; for example, the expansion beam 105 is a metal member and the bearing member 106 is a plastic member, but it is not limited thereto.

[0230] 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 expansion beam 105 , the carrier 106 itself has a good bearing capacity so as to reliably and stably withstand the expansion force of the battery cell 100 .

[0231] Please refer to Fig.14 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.

[0232] 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 .

[0233] 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 expansion 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.

[0234] Please refer to Figure 6 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.

[0235] 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.

[0236] 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.

[0237] It can be understood that when the heat exchange tube 1 is a flat tube or a harmonica tube, if the end 11 of the heat exchange tube 1 is passed through the avoidance channel 200a between the expansion 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 channel 200a in the thickness direction of the heat exchange tube 1, reducing the difficulty of forming the avoidance channel 200a, and / or reducing the weakening of the corresponding structure.

[0238] Please refer to Figure 25-Figure 29 In some embodiments, the first heat exchange element 102 includes a first heat exchange tube 1a, 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 120, and the first heat exchange tube 121 is bent and connected to the second heat exchange section 122.

[0239] 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 .

[0240] 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.

[0241] 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 .

[0242] 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.

[0243] 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 toward the width direction (i.e., 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.

[0244] 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.

[0245] Exemplarily, one end of the first heat exchange section 121 away from the second heat exchange section 122 can be connected to an end 11, and one end of the second heat exchange section 122 away from the first heat exchange section 121 is connected to another end 11, so that when the first heat exchange tube 1a is exchanging heat, the heat exchange medium can 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.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] Alternatively, if Figure 4 As shown, a plurality of heat exchange tubes 1 are arranged at intervals along the first direction, and the two heat exchange tubes 1 located at both ends of the first direction X1 are both first heat exchange tubes 1a; and the two first heat exchange tubes 1a are symmetrically arranged about the center line L extending along the second direction X2 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 located at both ends of the first direction into the first heat exchange tube 1a can make the battery cell 100 at both ends of the battery assembly in the first direction The temperature uniformity performance is better, and the overall temperature uniformity of the battery assembly is achieved. 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, and reduce the pressure drop in a single heat exchange channel, thereby improving the heat exchange efficiency.

[0253] 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.

[0254] 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.

[0255] Please refer to Figure 25-Figure 29 In some embodiments, the first heat exchange section 121 includes a first heat exchange portion 1211 and a first bending portion 1212. There are multiple first heat exchange portions 1211, and the multiple first heat exchange portions 1211 are arranged at intervals along the first direction. Each first heat exchange portion 1211 extends along the second direction. The first bending portion 1212 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, and the second direction is set at an angle to the first direction.

[0256] 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 heat exchange flow 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 X1 and the second direction X2 can be arranged at an angle of 30°, 60°, 80°, 120°, 150°, or 170°. For example Fig.25 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.

[0257] 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.

[0258] 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.

[0259] 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.

[0260] 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.

[0261] Please refer to Figure 25-Figure 29 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, 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, and 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.

[0262] 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.

[0263] 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.

[0264] 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.

[0265] 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.

[0266] 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.

[0267] 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.

[0268] Please refer to Figure 25-Figure 29 In some embodiments, the first heat exchange section 121 includes a plurality of first heat exchange parts 1211 , and the plurality of first heat exchange parts 1211 are bent and connected sequentially in a 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.

[0269] 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.

[0270] 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.

[0271] by Fig.25 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.

[0272] 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.

[0273] 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.

[0274] Alternatively, if Fig.25 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.

[0275] Please refer to Fig.25 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.

[0276] 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.

[0277] Please refer to Fig. 27 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] For example, Fig. 27 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.

[0282] 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.

[0283] Please refer to Fig.25 and Fig.26 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.

[0284] 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.

[0285] 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.

[0286] 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.

[0287] 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°.

[0288] 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.

[0289] In some embodiments, the first heat exchange tube 1a 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.

[0290] 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.

[0291] 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.

[0292] 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.

[0293] 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.

[0294] Please refer to Figure 27-Figure 29 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, then 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 structures of the second heat exchange tube 1b and the first heat exchange tube 1a are the same or different.

[0295] 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 includes 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 parts 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.

[0296] 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.

[0297] In the above technical solution, by setting the second heat exchange tube 1b, the diversity of the heat exchange flow channel of the first heat exchange element 102 can be increased, making the arrangement of the heat exchange tube 1 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.

[0298] 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.

[0299] 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.

[0300] Please refer to Fig.29 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.

[0301] 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.

[0302] Please refer to Fig.29 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 at least a portion 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.

[0303] 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.

[0304] 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.

[0305] For example, Fig.29 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.

[0306] 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.

[0307] Please refer to Fig.29 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 portion 1252, there are multiple sixth heat exchange parts 1251, and the multiple sixth heat exchange parts 1251 are arranged at intervals along the third direction X3, each sixth heat exchange part 1251 extends along the fourth direction X4, the second bending portion 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, and the fourth direction is set at an angle to the third direction; optionally, the fourth direction is perpendicular to the third direction.

[0308] 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 end 11 (i.e., the end 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 a 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.

[0309] 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.

[0310] 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.

[0311] 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.

[0312] 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.

[0313] Optionally, the third direction X3 is the same as the first direction X1, and the fourth direction X4 is the same as the second direction X2.

[0314] Please refer to Fig.29 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 within the U-shaped region 120 of the second heat exchange tube 1b, and the at least a portion of the third heat exchange tube 1c is non-straight.

[0315] 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.

[0316] For example, 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, the above-mentioned at least part of the third heat exchange tube 1c is bent and arranged in the U-shaped area 120 of the fourth heat exchange section 124 and is located outside the U-shaped area 120 of the third heat exchange section 123; or, the above-mentioned at least part of the third heat exchange tube 1c is bent and arranged in the U-shaped area 120 of the third heat exchange section 123.

[0317] 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.29As 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.

[0318] 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.

[0319] Please refer to Fig.15 In some embodiments, the expansion 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 alternately arranged.

[0320] 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.

[0321] In the above technical solution, the expansion beam 105 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 expansion beam 105, thereby improving the reliability of the expansion beam 105.

[0322] 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 expansion beam 105.

[0323] Please refer to Fig.15 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.

[0324] Exemplarily, the first plate body A1, the second plate body A2 and the reinforcing partition 1052 extend along the length direction of the expansion beam 105 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 expansion beam 105, which facilitates the assembly of the expansion beam 105. 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.

[0325] 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. It is not only connected to the first plate body A1 through the first connecting part 1052b and the third connecting part 1052d, and connected to the second plate body A2 through the second connecting part 1052c and the third connecting part 1052d, but the expansion beam 105 has a simple structure, is easy to assemble, and has good structural stability.

[0326] Please refer to Fig.10 , Fig.15In some embodiments, there are multiple expansion beams 105, and the multiple expansion beams 105 include a first expansion beam B1 and a second expansion beam B2 that are spaced apart. 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, and a fourth fixing member 112 is disposed in the cavity 1051a of the second expansion beam B2. The box assembly 1010 also includes a pull rope 110, which 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.

[0327] In the above technical solution, by arranging the pull rope 110 to be connected with the third fixing member 111 and the pull rope 110 to be connected with 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, since the third fixing member 111 and the fourth fixing member 112 are arranged in the cavity 1051a of the corresponding expansion beam 105, 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 105 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 105, 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 105 and causing the pull rope 110 to fail.

[0328] Optionally, when there are multiple expansion beams 105 including a first expansion beam B1 and a second expansion beam B2, an avoidance channel 200a may be formed between the first expansion beam B1 and the box body 101, the first heat exchange component 102 is arranged in the avoidance channel 200a200a, and the second expansion beam B2 does not form an avoidance channel 200a with the box body 101.

[0329] Of course, the structural type of the expansion beam 105 is not limited thereto.

[0330] Please refer to Figure 3 , Fig.10 and Fig. 20 In some embodiments, the box body 101 includes a first box body 101, the first box body 101 is an integral stamping part and the first box body 101 includes a bottom wall 1011a and a surrounding wall 1011b, the surrounding wall 1011b is arranged around the bottom wall 1011a, and the expansion beam 105 is connected to the bottom wall 1011a and the surrounding wall 1011b respectively. A first heat exchange member 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 exchange member 102 is provided between the top wall of the box body 101 and the battery cell 100.

[0331] 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.

[0332] In the related art, the bottom wall 1011a and the surrounding wall 1011b of the box body 101 are separate parts (for example, the profile box body 101), and the two are connected by multiple connecting parts to achieve sealing between the bottom wall 1011a and the surrounding wall 1011b. The number of connecting parts is large, even up to more than 100, which makes the assembly of the box body 101 cumbersome and the assembly efficiency low.

[0333] 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 a plurality of 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.

[0334] In the second aspect, the embodiment of the present application provides an electric device 1000, including the above-mentioned battery 200, and the battery 200 is used to provide electric energy. In the above technical solution, since the electric device 1000 adopts the above-mentioned battery 200, it is convenient to achieve good temperature control of the battery 200, and improve the reliability of the use of the electric device 1000.

[0335] Please refer to the accompanying drawings again to describe the battery 200 according to a specific embodiment of the present application.

[0336] Embodiment 1

[0337] refer to Figure 3-Figure 6 and Fig.25The battery 200 includes a box body 101, an expansion 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 expansion beam 105 are arranged in the box body 101 at intervals, so that the first heat exchanger 102 and the expansion 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.

[0338] There are two expansion beams 105, which are respectively a first expansion beam B1 and 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 arranged in the first cavity 101a. All battery cells 100 are arranged 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 arranged 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.

[0339] 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.

[0340] The first heat exchange member 102 includes two heat exchange tubes 1, each heat exchange tube 1 has two ends 11, the two ends 11 are respectively a first end 11a and a second end 11b, the circumferential side of the first heat exchange member 102 includes two sides oppositely arranged along the first direction X1 and two sides oppositely arranged along the second direction X2, and the first box body 101 and the second box body 102 are oppositely arranged along the fifth direction X5.

[0341] 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:

[0342] 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 11. 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.

[0343] 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.

[0344] 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.

[0345] 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.

[0346] 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 of the end portions 11, and the fourth heat exchange portion 1223 is bent and connected to the other end portion 11.

[0347] Embodiment 2

[0348] Reference Figure 7-10 and Fig.29 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: 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 a plurality of ends 11 and is disposed in the second cavity 101b, and the avoidance channel 200a is configured to allow the current collector 2 to pass through.

[0349] 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.

[0350] 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.

[0351] 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.

[0352] Embodiment 3

[0353] Reference Fig.13 and Fig. 27 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 ends 11a of all the heat exchange tubes 1 extend to one of the current collectors 2, and the second ends 11b of all the heat exchange tubes 1 extend to the other current collector 2.

[0354] 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.

[0355] 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.

[0356] 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.

[0357] 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: A box assembly comprises a box and an expansion beam, wherein the expansion beam is arranged in the box; A battery cell is disposed in the box and abuts against the expansion beam; The heat exchange assembly includes a first heat exchange element, which is arranged in the box and between the battery cell and the box. The first heat exchange element is used for heat exchange with the battery cell, and the first heat exchange element is spaced apart from the expansion beam so that the first heat exchange element and the expansion beam are thermally insulated.

2. The battery according to claim 1, characterized in that The heat exchange assembly further includes at least one of a second heat exchange element and a third heat exchange element, wherein the second heat exchange element is disposed outside the box body, and the third heat exchange element is disposed between two adjacent battery cells.

3. The battery according to claim 1 or 2, characterized in that: Also includes: A heat insulating member is disposed between the first heat exchange member and the expansion beam.

4. The battery according to any one of claims 1 to 3, characterized in that There are multiple expansion beams, one of which divides the internal space of the box into a first cavity and a second cavity. A part of the first heat exchange element and the battery cell are both arranged in the first cavity. At least one avoidance channel is formed between the expansion beam and the box. The first heat exchange element is inserted into the corresponding avoidance channel so that the first heat exchange element extends from the first cavity to the second cavity. The wall surface of the expansion beam corresponding to the avoidance channel is spaced apart from the first heat exchange element.

5. The battery according to claim 4, characterized in that The expansion 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 configure the avoidance channel.

6. The battery according to claim 4 or 5, characterized in that: Portions of the first heat exchange member located on opposite sides of the expansion beam are connected at an obtuse angle.

7. The battery according to any one of claims 4 to 6, characterized in that: The first heat exchange member includes a heat exchange tube and a current collector. A heat exchange channel is defined in the heat exchange tube. The end of the heat exchange channel is arranged to pass through the corresponding avoidance channel. The current collector corresponds to the avoidance channel one by one. The current collector is connected to the end of the heat exchange channel and is arranged in the second cavity. The current collector is connected to interfaces corresponding to the multiple ends of the avoidance channel, or the current collector separates the interfaces corresponding to the multiple ends of the avoidance channel into multiple independent flow channels.

8. The battery according to claim 7, characterized in that The avoidance channel is configured to allow the corresponding current collector to pass therethrough.

9. The battery according to any one of claims 4 to 8, characterized in that: A second recess is formed on the wall of the box body, and the second recess forms at least a portion of the avoidance channel. The portion of the first heat exchange element that passes through the avoidance channel is disposed in the second recess. The expansion beam is in contact with the wall of the box except the second recessed portion; or, The expansion beam is spaced apart from a portion of the wall of the box body except the second recessed portion.

10. The battery according to claim 9, 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 expansion beam corresponding to the avoidance channel and the first heat exchange member.

11. The battery according to claim 10, characterized in that The heat insulating member further includes a second heat insulating portion, which is provided between a portion of the wall of the box body excluding the second recess and the expansion beam.

12. The battery according to claim 11, characterized in that The expansion beam is also provided with a first fixing member, at least part of which is located inside the expansion beam. The battery further includes a second fixing member, which is disposed through the box body, the second heat insulating portion and the expansion beam and is connected to the first fixing member.

13. The battery according to any one of claims 4 to 12, characterized in that: The expansion beam has a first recessed portion, the first recessed portion is configured as at least a portion of the avoidance channel, the expansion beam also has a first mating surface abutting against the battery cell, and the box assembly further includes: A carrier, which is arranged in the avoidance channel 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 first heat exchange component, and the groove runs through the outer peripheral side of the carrier.

14. The battery according to claim 13, characterized in that A stopper is formed on at least one of the expansion beam and the box body, and is engaged with the bearing member in the normal direction of the first mating surface, so as to limit the movement of the bearing member from the first cavity toward the second cavity.

15. The battery according to claim 14, characterized in that The stopper is formed on one side of the expansion beam facing the first cavity at the position of the avoidance channel; and / or, A stop step protruding toward the expansion beam is formed on the wall of the box body where the first heat exchange member is disposed, and the stop step forms a stop portion.

16. The battery according to claim 15, characterized in that In the cross section of the expansion beam, the stopper on the expansion beam is formed into an arc structure, and the cross section of the expansion beam is perpendicular to the length direction of the expansion beam.

17. The battery according to any one of claims 13 to 16, 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 portion and is abutted against the expansion beam to limit movement of the bearing member along the direction from the first cavity toward the second cavity.

18. The battery according to claim 17, 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 expansion beam, and the second surface is connected to the second surface and is arranged flush with the second matching surface.

19. The battery according to claim 17 or 18, characterized in that: At least one clamping hole is formed on the expansion 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.

20. The battery according to any one of claims 17 to 19, 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 matching surface and is arranged to avoid the first heat exchange component, and the supporting portion is in a stop-matched relationship with the box body.

21. The battery according to claim 20, 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.

22. The battery according to any one of claims 13 to 21, characterized in that The bearing member is disposed between the first heat exchange member and the expansion beam. The thermal conductivity of the bearing member is lower than the thermal conductivity of the expansion beam; and / or, The bearing component is spaced apart from the first heat exchange component.

23. The battery according to any one of claims 13 to 22, 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 expansion beam.

24. The battery according to any one of claims 13 to 23, 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.

25. The battery according to any one of claims 1 to 24, characterized in that The first heat exchange component includes at least one heat exchange tube, and the heat exchange tube is a flat tube or a harmonica tube.

26. The battery according to any one of claims 1 to 25, characterized in that The first heat exchange element includes 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.

27. The battery according to claim 26, 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.

28. The battery according to claim 26 or 27, 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.

29. The battery according to claim 28, 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.

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

31. The battery according to any one of claims 26 to 30, characterized in that The first heat exchange section is connected to the downstream of the second heat exchange section along the fluid flow direction; or, the first heat exchange tube is configured as follows: when heating the battery cell, the first heat exchange section is connected to the downstream of the second heat exchange section along the fluid flow direction; when cooling the battery cell, the first heat exchange section is connected to the upstream of the second heat exchange section along the fluid flow direction.

32. The battery according to any one of claims 26 to 31, 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. The bending structure of the second heat exchange tube and the first heat exchange tube is the same or different.

33. The battery according to claim 32, 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.

34. The battery according to claim 33, characterized in that The second heat exchange tube includes a third heat exchange section and a fourth heat exchange section which are bent and connected, and the third heat exchange section and the fourth heat exchange section are respectively bent to form the U-shaped area, and the third heat exchange section is arranged in the U-shaped area of ​​the fourth heat exchange section, and at least a part of the first heat exchange section of the first heat exchange tube is arranged in the U-shaped area of ​​the third heat exchange section.

35. The battery according to claim 34, 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 portion is multiple and arranged at intervals along the first direction, the first heat exchange section includes a first heat exchange portion, the first heat exchange portion is multiple and 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 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, Among them, 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 end of the second heat exchange tube corresponding to the third heat exchange section away from the fourth heat exchange section.

36. The battery according to any one of claims 32 to 35, 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.

37. The battery according to any one of claims 1 to 36, characterized in that The expansion 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.

38. The battery according to claim 37, 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.

39. The battery according to claim 37 or 38, characterized in that The expansion beams are multiple and include a first expansion beam and a second expansion beam that are spaced apart. 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, and a fourth fixing member is disposed in the cavity of the second expansion beam. The box assembly also includes a pull rope that is passed through the corresponding cavity and is connected to the third fixing member and the fourth fixing member, respectively.

40. The battery according to any one of claims 1 to 39, characterized in that The box body comprises a first box body, which is an integral stamping part and comprises a bottom wall and a surrounding wall, wherein the surrounding wall is arranged around the bottom wall, and the expansion beam is connected to the bottom wall and the surrounding wall respectively.

41. An electrical device, characterized in that: Comprising a battery according to any one of claims 1-40.

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