Battery and electrical apparatus

Abstract

A battery (200) and an electrical apparatus (1000). The battery (200) comprises a box body assembly (1010), a battery cell (100), and a heat exchange assembly (1020). The box body assembly (1010) comprises a box body (101) and an expansion beam (105), the expansion beam (105) being disposed in the box body (101), and the battery cell (100) being disposed in the box body (101) and abutting against the expansion beam (105). The heat exchange assembly (1020) comprises a first heat exchange member (102), the first heat exchange member (102) being disposed in the box body (101) and located between the battery cell (100) and the box body (101). The first heat exchange member (102) is used for heat exchange with the battery cell (100), and the first heat exchange member (102) and the expansion beam (105) are disposed spaced apart, so as to cause the first heat exchange member (102) and the expansion beam (105) to be thermally insulated from each other.

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202420286916.7 and application date of February 6, 2024, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0004] New energy vehicles have experienced rapid growth in recent years. Batteries, as the power source of electric vehicles, play an irreplaceable and important role. Batteries typically use heat exchangers to control the temperature of individual cells, but their ability to maintain a balanced temperature balance within the cells needs improvement.

[0005] Summary of the Invention

[0006] 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.

[0007] 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 member, the first heat exchange member being disposed in the box and located between the battery cell and the box, the first heat exchange member being used for heat exchange with the battery cell, and the first heat exchange member being spaced apart from the expansion beam so as to insulate the first heat exchange member from the expansion beam.

[0008] In the above technical solution, the first heat exchange element is spaced apart from the expansion beam so as to be thermally insulated from the expansion beam, 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, which is beneficial to improving the thermal management performance of the battery.

[0009] 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.

[0010] 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.

[0011] In some embodiments, the battery further includes: a heat insulating member disposed between the first heat exchange member and the expansion beam.

[0012] 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 between the first heat exchange member and the expansion beam.

[0013] 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 arranged in the corresponding avoidance channel so that the first heat exchange element extends from the first cavity to the second cavity. The wall of the expansion beam corresponding to the avoidance channel is spaced apart from the first heat exchange element.

[0014] In the above technical solution, at least one avoidance channel is formed between the expansion beam and the housing, and the first heat exchange element is inserted into the corresponding avoidance channel, so that the first heat exchange element extends from the first chamber to the second chamber. This facilitates assembly of the first heat exchange element with the expansion beam and allows the first heat exchange element to extend into the second chamber without bending around the expansion beam, thereby simplifying the structure of the first heat exchange element. At the same time, the provision of the above avoidance channel allows the interfaces of the first heat exchange element to be located in the second chamber, that is, the interfaces of the first heat exchange element and the battery cells are located in different chambers, thereby providing the housing with suitable layout space for communication between the first heat exchange element and other components. At the same time, the expansion beam can separate the interfaces of the first heat exchange element from the battery cells, thereby reducing the impact of heat exchange medium leakage at the interface of the first heat exchange element on the battery cells and improving the reliability of the battery cells. Moreover, the wall of the expansion beam corresponding to the avoidance channel is spaced apart from the first heat exchange element, thereby facilitating thermal insulation between the first heat exchange element and the expansion beam, provided that the first heat exchange element is inserted from one side of the expansion beam to the other side of the expansion beam.

[0015] 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 form an escape channel. In the above technical solution, the escape channel is formed by providing the first recess and / or the second recess, which facilitates the formation of the escape channel and facilitates the formation of the escape channel with a suitable cross-sectional area to accommodate the portion through which the first heat exchange element is inserted, so that the cross-sectional area of ​​the escape channel can be appropriately reduced while ensuring smooth insertion of the first heat exchange element, thereby reducing the difficulty of forming the escape channel and / or reducing the weakening of the expansion beam.

[0016] In some embodiments, portions of the first heat exchange element located on opposite sides of the expansion beam are connected at an obtuse angle.

[0017] 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 penetration part of the first heat exchanger is first aligned with the avoidance channel. At this time, the first heat exchanger is roughly tilted. 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, which facilitates the penetration of the first heat exchanger and is beneficial to improving the installation convenience of the first heat exchanger.

[0018] 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.

[0019] In the above technical solution, by setting the first heat exchange element to include heat exchange tubes and a fluid collector, it is convenient to flexibly set up 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 facilitates improving 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.

[0020] In some embodiments, the avoidance channel is configured to allow the corresponding current collector to pass through.

[0021] In the above technical solution, by setting up an avoidance channel structure to allow the corresponding current collector to pass through, sufficient operating space is achieved when connecting the heat exchange tube and the current collector, facilitating the connection operation of the heat exchange tube and the current collector.

[0022] 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 portion of the wall of the box body except the second recess; or, the expansion beam is spaced apart from the portion of the wall of the box body except the second recess.

[0023] In the above technical solution, 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 passed through, 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 passed through, 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 distance between the entire expansion beam and the first heat exchanger, and 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.

[0024] In some embodiments, the battery further includes: a heat insulating member, the heat insulating member including 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.

[0025] In the above technical solution, by arranging the first heat insulation part between the wall of the expansion beam corresponding to the avoidance channel and the first heat exchange member, the first heat insulation part corresponds to the second recess, so that the thermal resistance between the expansion beam and the first heat exchange member is further increased through the heat insulation member.

[0026] In some embodiments, the thermal insulation member further comprises a second thermal insulation portion, which is disposed between the portion of the wall of the box body excluding the second recess and the expansion beam. In the above technical solution, by disposing the second thermal insulation portion between the portion of the wall of the box body excluding the second recess and the expansion beam, the thermal insulation member is conveniently sandwiched between the box body and the expansion beam, and the thermal insulation member is conveniently secured to the box body by the expansion beam. Thus, the thermal insulation member provides a relatively flat mating surface for the connection between the box body and the expansion beam, and at the same time helps to reduce the depth of the second recess, thereby improving the ease of forming the second recess.

[0027] In some embodiments, a first fixing member is further provided on the expansion beam, and at least a portion of the first fixing member is located inside the expansion beam. The battery further includes a second fixing member, and the second fixing member is provided through the box body, the second heat insulation part and the expansion beam and is connected to the first fixing member. In the above technical solution, by setting at least a portion of the first fixing member to be located inside the expansion beam, and making the second fixing member provided through the box body, the second heat insulation part and the expansion beam and connected to the first fixing member, the box body, the heat insulation part and the expansion beam are fixed by a simple fixing method, and the heat insulation part is reliably installed; at the same time, the second fixing member can be installed along the direction of the heat insulation part toward the expansion beam, so that there is sufficient operating space during the assembly of the second fixing member, thereby improving the convenience of assembly. In addition, the second fixing member is provided through the second heat insulation part, so that the second fixing member is separated from the first heat exchange part, so that the setting of the second fixing member does not affect the first heat exchange part.

[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 stops against the battery cell. The box assembly also includes: a support member, which is arranged in the avoidance channel and has a second mating surface that stops against the battery cell. The first mating surface is flush with the second mating surface. The support member has a groove for avoiding the first heat exchange member, and the groove runs through the outer peripheral side of the support member.

[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 plating 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 housing to engage with the support member in the normal direction of the first mating surface to limit the movement of the support member along the direction from the first cavity to the second cavity. In the above technical solution, by providing a stopper on at least one of the expansion beam and the housing to limit the movement of the support member in the direction from the first cavity to the second cavity, the support member can be reliably limited 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 conducive to improving the load-bearing 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. If at least one of the expansion beam and the housing is also connected and fixed to the support member by other means, such as bonding at least one of the expansion beam and the housing to the support member, the above solution is conducive to reducing the force exerted by other connection methods between at least one of the expansion beam and the housing and the support member, and is conducive to improving the reliability and stability of the support member.

[0031] In some embodiments, a stop portion is formed on the side of the expansion beam facing the first cavity at the avoidance channel position; and / or, the wall of the box body where the first heat exchange element is located is formed with a stop step protruding toward the expansion beam, and the stop step forms the stop portion.

[0032] In the above technical solution, a stop portion is formed at the avoidance space position by arranging the side of the expansion beam facing the first cavity, which makes it convenient to use the expansion beam's own structure to limit the stop portion to achieve the limitation of the carrier, 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 carrier "along the direction from the first cavity to the second cavity to cooperate with the avoidance channel space", so that the stop portion will not interfere with the assembly of the carrier, 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, which makes it convenient to use the box body's own structure to limit the stop portion to achieve the limitation of the carrier, 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.

[0033] In some embodiments, in a cross section of the expansion beam, the stopper on the expansion beam is formed into an arc-shaped structure, and the cross section of the expansion beam is perpendicular to the length direction of the expansion beam.

[0034] In the above technical solution, the stop portion provided on the expansion beam on the cross section of the expansion beam is formed into an arc-shaped structure, so that under the premise that the stop portion can limit the movement of the carrier, it can also achieve a certain degree of avoidance of the portion of the carrier that cooperates with the stop portion. At the same time, combined with the fact that the stop portion is located on the side of the expansion beam facing the first cavity, it is convenient to improve the bearing member's tendency to protrude from the first mating surface toward the first cavity due to cooperation with the stop portion, and it is convenient to achieve the flush setting of the second mating surface with the first mating surface. In addition, when the portion of the expansion beam corresponding to the stop portion is an integrally formed bent plate, the stop portion can be located at the bent position of the plate, so that the formation of the stop 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.

[0035] In some embodiments, the carrier comprises: a plate portion, wherein a second mating surface is formed on one side of the plate portion, and a groove is formed on both sides of the plate portion; and a mating portion, wherein the mating portion is formed at the outer edge of the plate portion and abuts against the expansion beam to limit the movement of the carrier along the first cavity toward the second cavity. In the above technical solution, by providing the carrier with the plate portion and the mating portion, the plate portion provides a larger and relatively flat second mating surface, thereby improving the shielding ability of the carrier for the avoidance space. The mating portion can also limit the position of the carrier and ensure reliable installation of the carrier, so that the carrier has a certain ability to withstand the expansion force of the battery cell. At the same time, the carrier structure is simple and easy to implement. In addition, because the mating portion abuts against the expansion beam, if the expansion beam deforms to a certain extent under the action of the battery cell, causing the first mating surface to deviate from its original position and / or original posture, the mating portion can adapt to the deformation of the expansion beam and adjust the second mating surface of the carrier to the change of the first mating surface, thereby ensuring that the second mating surface is always flush with the first mating surface or has a small offset.

[0036] In some embodiments, the mating portion has a first surface and a second surface, the first surface is formed as an arcuate surface concave toward the second surface and mated with the expansion beam, and the second surface is connected to the second surface and is flush with the second mating surface.

[0037] In the above technical solution, the first surface of the mating portion is arranged to engage with the expansion beam. Since the first surface is arranged in an arc shape, it is convenient to achieve limited engagement between the carrier and the expansion beam, and at the same time, it is convenient to prevent the second surface from protruding from the second mating surface toward the first cavity, and will not affect the engagement between the second mating surface and the battery cell.

[0038] In some embodiments, at least one latch hole is formed on the expansion beam, and the supporting member further includes: at least one hook portion, the hook portion is formed at the outer edge of the plate body and is located on the side of the plate body away from the second mating surface, and the hook portion is clamped in the corresponding latch hole.

[0039] 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 escape from 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.

[0040] In some embodiments, the carrier further includes: at least one supporting portion, which is provided 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 engagement with the box body.

[0041] 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 abutment fit between the plate body portion and the battery cell; and the abutment 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 more evenly. At the same time, since the support portion avoids the slot setting, the setting of the support portion will not interfere with the first heat exchange component, which facilitates the convenient assembly of the carrier.

[0042] In some embodiments, the width of the support portion in the thickness direction of the plate portion increases from the mating portion toward the first heat exchange element.

[0043] In the above technical solution, by setting the width of the support portion in the thickness direction of the plate to increase from the matching portion toward the first heat exchanger, it is convenient to use less material to increase the stop-fit ​​area between the support portion and the box, thereby improving the matching reliability of the support portion and the box, and achieving a balance between cost and load-bearing reliability.

[0044] 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 that of the expansion beam; and / or the bearing member is spaced apart from the first heat exchange member.

[0045] In the above technical solution, the carrier is arranged between the first heat exchange member and the expansion beam. 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 exchange member are spaced apart, which is beneficial to increase the thermal resistance between the first heat exchange member and the expansion beam, and reduce the heat exchange between the expansion beam and the first heat exchange member group. To a certain extent, it is beneficial to increase the proportion of heat or cold transferred from the first heat exchange member to the battery cell, thereby improving the thermal management performance. In addition, when the carrier and the first heat exchange member are spaced apart, the risk of interference between the carrier and the first heat exchange member can be reduced during assembly of the carrier, thereby improving the installation convenience of the carrier.

[0046] 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.

[0047] In the above technical solution, by setting the strength of the material of the supporting member to be at least 0.8 times the strength of the material of the expansion beam, the supporting member itself has a good load-bearing capacity, so as to reliably and stably withstand the expansion force of the battery cell.

[0048] In some embodiments, the first heat exchange element is arranged on the bottom wall of the box body, and the end of the second mating surface facing the first heat exchange element is arranged flush with the end of the battery cell facing the corresponding first heat exchange element, or, the end of the second mating surface facing the first heat exchange element is arranged adjacent to the first heat exchange element compared to the end of the battery cell facing the corresponding first heat exchange element.

[0049] 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, the end of the second mating surface facing the first heat exchanger is arranged adjacent to the first heat exchanger compared to the 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.

[0050] 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.

[0051] In the above technical solution, by setting the heat exchange tube as a flat tube or a harmonica tube, it is beneficial 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 art, a water-cooled plate structure is adopted. The water-cooled plate usually includes two stacked plates, which are welded and fixed to define a flow channel. For this reason, the thickness of the water-cooled plate is usually thick and can reach 2.4mm or more. It can be seen that the above-mentioned setting of the present application can reduce the cost of the first heat exchange component, while saving the space occupied by the first heat exchange component, so that when the first heat exchange component is arranged in the box, the battery energy density can also be improved.

[0052] 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.

[0053] 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 compensate 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.

[0054] 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 multiple first heat exchange parts are connected in sequence, and the second direction is set at an angle to the first direction.

[0055] 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, thereby improving the heat exchange effect of the first heat exchange tube; on the other hand, since the internal battery cells are wrapped by the external battery cells, 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.

[0056] 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.

[0057] 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 and 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, it can also simplify the structure of the first heat exchange tube and facilitate the processing and production of the first heat exchange component.

[0058] 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 farthest from the second heat exchange part along the first direction; a fourth heat exchange part is located on the other side of the plurality of first heat exchange parts along the second direction, one end of the fourth heat exchange part is connected to 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 is connected to the 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, 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.

[0059] In the above embodiment, a plurality of first heat exchange parts are provided which are 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.

[0060] In some embodiments, the second heat exchange section further includes a fifth heat exchange portion, which extends along the fourth side periphery of the first heat exchange section and closes at least part of the opening of the U-shaped area formed by the second heat exchange portion, the third heat exchange portion and the fourth heat exchange portion.

[0061] In the above embodiment, by providing the fifth heat exchange part, the second heat exchange section can perform heat exchange on the four sides of the assembly composed of all battery cells. In this way, the second heat exchange section of a first heat exchange tube can be used to perform heat exchange on the four sides of the assembly composed of multiple battery cells, which is beneficial to improving the heat exchange effect on the four sides of the battery and enhancing the temperature uniformity of the battery.

[0062] In some embodiments, the first heat exchange section is connected to the downstream of the second heat exchange section along the direction of fluid flow; alternatively, the first heat exchange tube is configured such that: when heating the battery cell, the first heat exchange section is connected to the downstream of the second heat exchange section along the direction of fluid flow; when cooling the battery cell, the first heat exchange section is connected to the upstream of the second heat exchange section along the direction of fluid flow.

[0063] In the above technical solution, by connecting the first heat exchange section downstream of the second heat exchange section along the fluid flow direction, the first heat exchange channel can preferentially exchange heat along the outer circumference of the battery, thereby improving the temperature difference between the battery in different environments and, to a certain extent, increasing the battery's service life. By configuring the first heat exchange tube so that: when heating the battery cell, the first heat exchange section is connected downstream of the second heat exchange section along the fluid flow direction; when cooling the battery cell, the first heat exchange section is connected 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.

[0064] In some embodiments, the first heat exchange element further 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 a portion of the second heat exchange tube is bent and arranged in the U-shaped area of ​​the first heat exchange tube, and the bending structure of the second heat exchange tube and the first heat exchange tube is the same or different.

[0065] In the above technical solution, by setting up the second heat exchange tube, the diversity of the heat exchange flow path 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.

[0066] 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.

[0067] In the above technical solution, by arranging at least part of the first heat exchange section of the first heat exchange tube within 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.

[0068] 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 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.

[0069] 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.

[0070] 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 bend portion, there are multiple fifth heat exchange portions and they are spaced apart along the first direction, each first heat exchange portion extends along the second direction, the second bend portion is arc-shaped and is bent and connected between two adjacent fifth heat exchange portions, so that the 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.

[0071] 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 conducive to achieving temperature control of the internal battery cells. Moreover, 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.

[0072] 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.

[0073] 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 to improve the temperature uniformity of the battery.

[0074] 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 staggered.

[0075] In the above technical solution, an expansion beam is provided including a beam body and a reinforcing partition. The reinforcing partition is provided in the cavity and divides the cavity of the beam body into multiple chambers, so that the reinforcing partition plays a certain supporting and reinforcing role on the relative sides of the beam body, which is beneficial to improving the structural strength, bearing capacity and structural stability of the expansion beam, thereby improving the reliability of the expansion beam.

[0076] 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.

[0077] In the above technical solution, the beam body includes a first plate body and a second plate body, and the 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 connection part and the third connection part, and connected to the second plate body through the second connection part and the third connection part, the expansion beam has a simple structure, is easy to assemble, and has good structural stability.

[0078] In some embodiments, there are multiple expansion beams including a first expansion beam and a second expansion beam arranged at intervals, the battery cell is arranged between the first expansion beam and the second expansion beam, a third fixing member is provided in the cavity of the first expansion beam, and a fourth fixing member is provided in the cavity of the second expansion beam. The 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.

[0079] 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 apply a force to 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 reducing the risk of the above-mentioned at least one of the third fixing member and the fourth fixing member being separated from the corresponding expansion beam, causing the pull rope to fail.

[0080] 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.

[0081] 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 molding 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 helping to improve the assembly efficiency of the box body.

[0082] In a second aspect, an embodiment of the present application provides an electrical device comprising the above-mentioned battery.

[0083] In the above technical solution, by adopting the above battery, it is easy to achieve good temperature control of the battery and improve the reliability of the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] 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:

[0085] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0086] FIG2 is an exploded view of the structure of a battery provided in some embodiments of the present application;

[0087] FIG3 is a partial schematic diagram of a battery provided in some embodiments of the present application;

[0088] FIG4 is an exploded view of the battery shown in FIG3 ;

[0089] FIG5 is a cross-sectional view of the battery shown in FIG3;

[0090] FIG6 is an enlarged view of the circled portion A in FIG5 ;

[0091] FIG7 is a partial schematic diagram of a battery provided in some embodiments of the present application;

[0092] FIG8 is a cross-sectional view along line BB in FIG7;

[0093] FIG9 is an enlarged view of the circled portion C in FIG8 ;

[0094] FIG10 is another schematic diagram of the battery shown in FIG7 ;

[0095] FIG11 is a partial schematic diagram of a battery provided in some embodiments of the present application;

[0096] FIG12 is a schematic diagram of a third heat exchange element and a battery cell provided in some embodiments of the present application;

[0097] FIG13 is a partial schematic diagram of a battery provided in some embodiments of the present application;

[0098] FIG14 is a cross-sectional view along line EE in FIG13;

[0099] FIG15 is a cross-sectional view taken along line FF in FIG13;

[0100] FIG16 is a cross-sectional view taken along line GG in FIG13;

[0101] FIG17 is a partial cross-sectional view of a box provided in some embodiments of the present application;

[0102] FIG18 is a schematic diagram of the assembly process of the first heat exchange member along the sectional view of line DD in FIG13;

[0103] FIG19 is a partial enlarged view of the assembly process of the first heat exchange element in FIG18;

[0104] FIG20 is a partial schematic diagram of a battery provided in some embodiments of the present application;

[0105] FIG21 is a front view of the carrier shown in FIG20;

[0106] FIG22 is a top view of the carrier shown in FIG21;

[0107] FIG23 is a cross-sectional view taken along line HH in FIG21;

[0108] FIG24 is a side view of the carrier shown in FIG21;

[0109] FIG25 is a schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0110] FIG26 is a schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0111] FIG27 is a schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0112] FIG28 is a schematic diagram of a first heat exchange element provided in some embodiments of the present application;

[0113] FIG29 is a schematic diagram of a first heat exchange element provided in some embodiments of the present application.

[0114] Reference numerals: 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 105 c, beam 1051, cavity 1051a, chamber 1051b, first plate A1, second plate 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 portion 1061, mating portion 1062, first surface 1062a, second surface 1062b, hook portion 1063, support portion 1064, thermal insulation member 107, first thermal insulation portion 1071, second Second heat insulation part 1072, second mounting hole 1072a, first fixing part 1081, second fixing part 1082, gasket 1083, third expansion beam B3, pull rope 110, third fixing part 111, fourth fixing part 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 11, first end 11a, second end 11b, connecting section 12, U-shaped area 120, first heat exchange section 121, first heat exchange part 1211, first bending part 1212, second heat exchange section 122, second Heat exchange part 1221, third heat exchange part 1222, fourth heat exchange part 1223, fifth heat exchange part 1224, third heat exchange segment 123, seventh heat exchange part 1231, eighth heat exchange part 1232, ninth heat exchange part 1233, fourth heat exchange segment 124, tenth heat exchange part 1241, eleventh heat exchange part 1242, twelfth heat exchange part 1243, fifth heat exchange segment 125, sixth heat exchange part 1251, second bending part 1252, sixth heat exchange segment 126, seventh heat exchange segment 127, thirteenth heat exchange part 1271, third bending part 1272, collector 2. DETAILED DESCRIPTION

[0115] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0116] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" 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-secondary relationship.

[0117] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0118] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0119] 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 in different embodiments are omitted. 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 for illustrative purposes only and should not constitute any limitation on the present application.

[0120] The term "plurality" used in this application refers to two or more (including two).

[0121] In this 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 this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0122] The battery referred to in the embodiments of this application refers to a single physical module that includes multiple battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may be a battery module or battery pack. A battery module generally includes multiple battery cells. A battery generally includes a casing for enclosing multiple battery cells or multiple battery modules. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells. Of course, the battery may also not include a casing.

[0123] For example, a battery cell typically includes a housing, a cell assembly, and an electrolyte. The housing is used to house the cell assembly and electrolyte, and is provided with at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive and negative electrode sheets and separators.

[0124] The positive electrode sheet generally includes 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. Multiple positive electrode tabs are stacked together and electrically connected to the positive electrode column. For example, the stacked multiple positive electrode tabs can be directly welded to the positive electrode column to form an electrical connection. Alternatively, the battery cell assembly may further include a positive electrode adapter. The stacked multiple positive electrode tabs are welded to one end of the positive electrode adapter, and the other end of the positive electrode adapter is welded to the positive electrode column to form an electrical connection between the positive electrode tab and the positive electrode column.

[0125] 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. Multiple negative electrode tabs are stacked together and electrically connected to the negative electrode column. For example, the multiple stacked negative electrode tabs can be directly welded to the negative electrode column to form an electrical connection; alternatively, the battery cell assembly can further include a negative electrode adapter. The multiple stacked negative electrode tabs are welded to one end of the negative electrode adapter, and the other end of the negative electrode adapter is welded to the negative electrode column to form an electrical connection between the negative electrode tab and the negative electrode column. The material of the separator is not limited, and can be, for example, polypropylene or polyethylene.

[0126] In recent years, new energy vehicles have experienced rapid development. In the electric vehicle sector, batteries, as the power source of electric vehicles, play an irreplaceable and important role. As core components of new energy vehicles, batteries have high requirements in terms of both energy density and reliability.

[0127] In the related art, batteries use heat exchange components to achieve temperature control of battery cells. However, the heat or cold loss of the heat exchange components is large, resulting in poor temperature control capability of the battery cells.

[0128] Based on the above considerations, in order to reduce the heat or cold loss of the heat exchange component, a battery is proposed, which includes a box assembly, a battery cell and a heat exchange component. The box assembly includes a box and an expansion beam. The expansion beam is arranged in the box, and the battery cell is arranged in the box and abuts against the expansion beam. The heat exchange component includes 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.

[0129] In the above technical solution, the first heat exchange element is spaced apart from the expansion beam so as to be thermally insulated from the expansion beam, 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, which is beneficial to improving the thermal management performance of the battery.

[0130] The embodiments of the present application provide an electric device using the battery disclosed herein as a power source. 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-powered vehicle, 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 includes a metal cutting power tool, a grinding power tool, an assembly power tool, and a railway power 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.

[0131] 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.

[0132] Please refer to Figure 1, which is a schematic structural diagram of a vehicle in which the power-consuming device 1000 provided in some embodiments of the present application is 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 not only serve 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.

[0133] Please refer to Figure 2, which is an exploded view of the structure of the battery cell 100 provided in some embodiments of the present application for the battery 200. The battery 200 includes a housing 101 and a plurality of battery cells 100, and the battery cells 100 are accommodated in the housing 101. Among them, the housing 101 is used to provide an assembly space for the battery cells, and the housing 101 can adopt a variety of structures. In some embodiments, the housing 101 may include a first housing 1011 and a second housing 1012, and the first housing 1011 and the second housing 1012 cover each other, and the first housing 1011 and the second housing 1012 jointly define a housing cavity for accommodating the battery cells 100. The second box body 1012 can be a hollow structure with one end open, and the first box body 1011 can be a plate-like structure, with the first box body 1011 covering the open side of the second box body 1012, so that the first box body 1011 and the second box body 1012 jointly define a receiving cavity; alternatively, the first box body 1011 and the second box body 1012 can both be hollow structures with one end open (for example, as shown in FIG. 2 ), with the open side of the first box body 1011 covering 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 have various shapes, such as a cylinder or a rectangular parallelepiped.

[0134] In the battery 200, multiple battery cells 100 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 100. Multiple battery cells 100 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 100 can be housed within the housing 101. Alternatively, the battery 200 can be constructed by first connecting multiple battery cells 100 in series, in parallel, or in a hybrid connection to form a battery module. The multiple battery modules are then connected in series, in parallel, or in a hybrid connection to form a single unit, which is then housed within the housing 101. The battery 200 may also include other structures. For example, the battery 200 may also include a busbar to electrically connect the multiple battery cells 100.

[0135] Referring to FIG. 3 , any two of the first direction X1 , the second direction X2 , and the fifth direction X5 intersect with each other. Furthermore, any two of the first direction X1 , the second direction X2 , and the fifth direction X5 are perpendicular to each other.

[0136] Please refer to Figures 3 to 6. In 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 arranged in the box 101, and the battery cell 100 is arranged in the box 101. 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 arranged in the box 101, and the first heat exchange element 102 is located between the battery cell 100 and the box 101. The first heat exchange element 102 is used to exchange heat with the battery cell 100 so that the temperature of the battery cell 100 can be controlled by the first heat exchange element 102.

[0137] Because the first heat exchange element 102 is located within the housing 101 and between the battery cells 100 and the housing 101, good heat transfer between the first heat exchange element 102 and the battery cells 100 is facilitated. Furthermore, the first heat exchange element 102 is not exposed outside the housing 101, facilitating sealing of the heat exchange tubes 1. In this case, the first heat exchange element 102 can be located on any side of the battery cells 100; for example, the first heat exchange element 102 can be located on at least one of the top, bottom, left, right, front, and rear sides of the battery cells 100. In other words, for the housing 101, the first heat exchange element 102 can be located on at least one of the top wall, bottom wall 1011a, left wall, right wall, front wall, and rear wall of the housing 101.

[0138] In the embodiment of the present application, there is no specific limitation on the fixing method of the first heat exchanger 102 and the box body 101. For example, the fixing method of the first heat exchanger 102 and the box body 101 includes, but is not limited to, bonding the first heat exchanger 102 and the box body 101, for example, the first heat exchanger 102 is bonded to the box body 101 by double-sided tape or structural adhesive.

[0139] Among them, the first heat exchange element 102 and the expansion beam 105 are spaced apart so that the first heat exchange element 102 and the expansion beam 105 are thermally insulated. It can be understood that the thermal resistance between the first heat exchange element 102 and the expansion beam 105 is greater than the thermal resistance between the first heat exchange element 102 and the battery cell 100, which is beneficial to reducing the heat or cold taken away from the first heat exchange element 102 by the expansion beam 105.

[0140] 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 temperature difference 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 cause the temperature of the expansion beam to be lower than the peripheral battery cells 100 when the heat exchange component cools the battery cells 100, and the temperature of the expansion beam to be higher than the peripheral battery cells 100 when the heat exchange component heats the battery cells 100. At this time, the temperature difference between the peripheral battery cells 100 and the internal battery cells 100 will be further aggravated.

[0141] In the above technical solution, the first heat exchange member 102 is spaced apart from the expansion beam 105, so that the first heat exchange member 102 and the expansion beam 105 are thermally insulated, thereby improving the thermal resistance between the first heat exchange member 102 and the expansion beam 105, reducing the amount of heat or cold transferred from the first heat exchange member 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 that stops therewith, thereby improving the adjacent 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, helping to improve the internal temperature distribution balance 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 conducive to improving the thermal management performance of the battery 200.

[0142] It is understood that the first heat exchange element 102 and the expansion beam 105 can be spaced apart throughout the lifecycle of the battery 200. Furthermore, when the housing 101 comprises a top wall, a bottom wall 1011a, and a surrounding wall, the first heat exchange element 102 can be positioned between at least one of the top wall, the bottom wall 1011a, or the surrounding wall and the battery cell 100. The surrounding wall can comprise a plurality of side walls connected end to end, and the first heat exchange element 102 on the surrounding wall can be positioned between at least one of the side walls and the battery cell 100.

[0143] Please refer to Figures 11 and 12. In 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.

[0144] 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 the adjacent battery cell 100, and the third heat exchange element 104 can heat exchange with at least two battery cells 100.

[0145] In the embodiment of the present application, when the battery 200 includes a second heat exchange element 103, there is no specific restriction on the setting position of the second heat exchange element 103; 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 guard plate 113 under the second heat exchange element 103, the second heat exchange element 103 can be more reliably protected, 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.

[0146] 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.

[0147] 4 and 6 , in some embodiments, the battery 200 further includes a heat insulating member 107 disposed between the first heat exchange member 102 and the expansion beam 105. In this embodiment, whether the expansion beam 105 and the housing 101 form an escape channel 200a is not specifically limited.

[0148] In the above technical solution, by arranging the heat insulation 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.

[0149] Of course, in other embodiments of the present application, the heat insulation 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 above-mentioned 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 insulation ability and can also increase the thermal resistance between the first heat exchange member 102 and the expansion beam 105.

[0150] Referring to Figures 4-6 , in some embodiments, there are multiple expansion beams 105 , one of which divides the interior space of the housing 101 into a first chamber 101a and a second chamber 101b . A portion of the first heat exchange element 102 and the battery cell 100 are both located in the first chamber 101a . The portion of the first heat exchange element 102 located in the first chamber 101a is used for heat exchange with the battery cell 100 . At least one escape channel 200a is formed between the expansion beam 105 and the housing 101 . Partial surfaces of the expansion beam 105 and the housing 101 define partial walls of the escape channel 200a , and partial surfaces of the housing 101 define partial walls of the escape channel 200a . The first heat exchange element 102 is disposed in the corresponding escape channel 200a , extending from the first chamber 101a to the second chamber 101b . The wall of the expansion beam 105 corresponding to the escape channel 100a is spaced apart from the first heat exchange element 102 .

[0151] 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.

[0152] 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 exchange element 102 is passed through the corresponding avoidance channel 200a, so that the first heat exchange element 102 extends from the first cavity 101a to the second cavity 101b, which facilitates the assembly of the first heat exchange element 102 and the expansion beam 105, and makes it easier for the first heat exchange element 102 to extend to the second cavity 101b without bending around the expansion beam 105, which is beneficial to simplifying the structure of the first heat exchange element 102; at the same time, the arrangement of the above avoidance channel 200a can make the interfaces of the first heat exchange element 102 all located in the second cavity 101b, that is, the interfaces of the first heat exchange element 102 and the battery cells 100 are separated. They are located in different cavities, which makes it convenient for the box body 101 to 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 heat exchange medium leakage at the interface of the first heat exchanger 102 on the battery cell 100, and is convenient for improving the reliability 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.

[0153] 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. The second expansion beam B2 described later is arranged in the first cavity 101a and has no 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 separated to achieve a heat insulation setting. It can be seen that no matter whether the avoidance channel 200 a 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.

[0154] In some embodiments, the first cavity 101a may also contain other components in addition to the battery cells 100. For example, a first expansion beam B1 divides the interior space of the box body 101 into a first cavity 101a and a second cavity 101b. A second expansion beam B2 may also be disposed within the first cavity 101a, with all battery cells 100 sandwiched between the first expansion beam B1 and the second expansion beam B2. For another example, the expansion beam 105 may be configured as the first expansion beam B1. A second expansion beam B2 and a third expansion beam B3 may also be disposed within 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.

[0155] Referring to Figures 6 and 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 escape passage 200a. For example, the expansion beam 105 has the first recess 105a, the wall of the box body 101 does not have the second recess 101c, and only the first recess 105a forms the escape passage 200a; or, the expansion beam 105 does not have the first recess 105a, the wall of the box body 101 has the second recess 101c, and only the second recess 101c forms the escape passage 200a; or, the expansion beam 105 has the 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 the escape passage 200a.

[0156] 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 element 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 element 102 is provided in the corresponding avoidance channel 200a; for another example, a first heat exchange element 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 element 102 is provided in the corresponding avoidance channel 200a; for another example, a first heat exchange element 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 element 102 is provided in the corresponding avoidance channel 200a.

[0157] 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.

[0158] 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 portion of the first heat exchanger 102 according to needs, so that on the premise of achieving the 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.

[0159] 18 and 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.

[0160] 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 penetration 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 tilted. 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.

[0161] It can be seen that the above solution is particularly suitable for assembling the first heat exchange element 102 onto the housing 101 after the expansion beam 105 and the housing 101 are assembled. For example, after the expansion beam 105 and the housing 101 are welded, the expansion beam 105 and the housing 101 are electrophoresed together, and the first heat exchange element 102 is installed after the electrophoresis is completed. Of course, in other embodiments of the present application, the first heat exchange element 102 can also be assembled onto the housing 101 first, and then the expansion beam 105 and the housing 101 are assembled.

[0162] Of course, in other embodiments, the angle α may also be a flat angle, as shown in FIG. 10 .

[0163] Referring to FIG7 , in some embodiments, the first heat exchange element 102 includes a heat exchange tube 1 and a fluid collector 2. A heat exchange channel 10 is defined within the heat exchange tube 1. An end 11 of the heat exchange channel 10 is disposed in a corresponding avoidance channel 200a. The fluid collector 2 corresponds one-to-one with the avoidance channel 200a. The fluid collector 2 is connected to the end 11 of the heat exchange channel 10 and is disposed in the second cavity 101b. For example, the fluid collector 2 may be connected to multiple ends 11 disposed in corresponding avoidance channels 200a. These multiple ends 11 may belong to the same heat exchange tube 1 or to 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 may be disposed in the same avoidance channel 200a or in different avoidance channels 200a.

[0164] 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 passing through the avoidance channel 200a are all used for liquid inflow or liquid outflow, 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 of the multiple ends 11 is gathered in the current collector 2; when at least one of the multiple ends 11 passing through the avoidance channel 200a is used for liquid inflow and at least one of the other ends is used for liquid outflow, 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 medium to the end 11, and at least one of the other flow channels is used to collect the medium flowing out of the end 11.

[0165] For example, as shown in FIG4 , when there is one heat exchange tube 1, there is one fluid collector 2, and the two ends 11 of the heat exchange channel 10 are respectively connected to the fluid collector 2. At this time, two independent flow channels are defined in the fluid 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 fluid collector 2, and the two ends 11 of each heat exchange channel 10 are respectively connected to the fluid collector 2. Two independent flow channels are also defined in the fluid 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 shown in FIG7 , there are multiple heat exchange tubes 2 and the fluid collector 2 is two, the ends 11 of all heat exchange channels 10 for liquid inlet are connected to one of the collectors 2, and the ends 11 of all heat exchange channels 10 for liquid outlet are connected to the other collector 2; or, there are multiple heat exchange tubes 2, there are two collectors 2, the two ends 11 of the heat exchange channel 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 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 collector 2.

[0166] In the above technical solution, by setting the first heat exchange element 102 to include a heat exchange tube 1 and a fluid collector 2, it is convenient to flexibly set the first heat exchange element 102 by adjusting at least one of the number of heat exchange tubes 1 and the number of fluid collectors 2; at the same time, the setting of the fluid collector 2 makes it convenient to improve the overall structural stability and reliability of the first heat exchange element 102 while ensuring the normal circulation of the medium in each heat exchange tube 1.

[0167] 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.

[0168] Please refer to Figures 18 and 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.

[0169] 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 not 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.

[0170] In the above technical solution, the avoidance channel 200a is configured to allow the corresponding collector 2 to pass through, so as to provide sufficient operating space for connecting the heat exchange tube 1 and the collector 2, thereby facilitating the connection operation of the heat exchange tube 1 and the collector 2.

[0171] Referring to Figures 8 and 9 , in some embodiments, a second recess 101c is formed in the wall of the housing 101. The second recess 101c defines at least a portion of the avoidance passage 200a. The portion of the first heat exchange element 102 extending through the avoidance passage 200a is located in the second recess 101c. The expansion beam 105 is aligned with the portion of the housing 101 wall excluding the second recess 101c, or alternatively, the expansion beam 105 is spaced apart from the portion of the housing 101 wall excluding the second recess 101c.

[0172] In the above technical solution, the expansion beam 105 is arranged to fit the wall of the box body 101 except the second recess 101c. As 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 exchange element 102 is inserted, that is, the expansion beam 105 is separated from the second recess 101c, so as to achieve heat insulation between the expansion beam 105 and the first heat exchange element 102 while avoiding the first heat exchange element 102. At the position where the first heat exchange element 102 is not inserted, the expansion beam 105 fits the wall of the box body 101, that is, the expansion beam 105 is separated from the second recess 101c. 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, which is beneficial to improving the installation reliability of the expansion beam 105; by setting the expansion beam 105 and the wall of the box body 101 except the second recess 101c to be spaced apart, it is beneficial to further increase the distance between the entire expansion beam 105 and the first heat exchange element 102, which is convenient for improving the thermal resistance between the entire expansion beam 105 and the first heat exchange element 102, reducing the heat or cold transferred from the first heat exchange element 102 to the expansion beam 105, and facilitating improving the energy utilization rate of the first heat exchange element 102.

[0173] Referring to Figures 8 and 9 , in some embodiments, the battery 200 further includes a third expansion beam B3 disposed within the first cavity 101a. Battery cells 100 are disposed on opposite sides of the third expansion beam B3. The portion of the first heat exchange element 102 located within the first cavity 101a is disposed within the clearance space between the third expansion beam B3 and the housing 101, allowing portions of the first heat exchange element 102 to be 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 to provide thermal insulation between the two elements.

[0174] Exemplarily, 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.

[0175] For example, the wall of the housing 101 is formed with a third recess 101d, which defines at least a portion of a clearance space. The portion of the first heat exchange element 102 extending through the clearance space is located within the third recess 101d. The third expansion beam B3 is aligned with the portion of the housing 101 wall excluding the third recess 101d; alternatively, the third expansion beam B3 is spaced apart from the portion of the housing 101 wall excluding the third recess 101d.

[0176] Please refer to Figure 6. In some embodiments, the battery 200 also includes a thermal insulation member 107, which includes a first thermal insulation portion 1071. The first thermal insulation portion 1071 is arranged 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 part of the gap between the wall of the expansion beam 105 corresponding to the avoidance channel 200a and the first heat exchange member 102.

[0177] In the above technical solution, by setting the first thermal 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 thermal 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 thermal insulation component 107.

[0178] 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 above-mentioned 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.

[0179] Please refer to FIG. 6 . In some embodiments, the thermal insulation member 107 further includes a second thermal insulation portion 1072 . The second thermal insulation portion 1072 is disposed between the expansion beam 105 and a portion of the wall of the box body 101 excluding the second recess 101 c .

[0180] 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. For example, the housing 101 is formed with a plurality of spaced second recesses 101c at positions corresponding to the avoidance passage 200a, each second recess 101a accommodating one end 11. There are a plurality of first thermal insulation portions 1071 and a plurality of second thermal insulation portions 1072, each of which is alternately arranged along the length of the expansion beam 105.

[0181] In the above scheme, by arranging the second insulation part 1072 between the part of 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.

[0182] 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 insulation portion 1072 and the expansion beam 105, and the second fixing member 1082 is connected to the first fixing member 1081.

[0183] In the above technical solution, by setting at least a portion of the first fixing member 1081 to be located within the expansion beam 105, and by allowing the second fixing member 1082 to pass through the box body 101, the second heat insulation portion 1072, and the expansion beam 105 and be connected to the first fixing member 1081, the box body 101, the heat insulation member 107, and the expansion beam 105 are fixed in a simple fixing manner, while 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, which facilitates sufficient operating space during the assembly of the second fixing member 1082 and improves assembly convenience. In addition, the second fixing member 1082 is passed through the second heat insulation portion 1072, which facilitates the separation of the second fixing member 1082 from the first heat exchange member 102, so that the installation of the second fixing member 1082 will not affect the first heat exchange member 102.

[0184] 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 insulating 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 with the second mounting hole 1072a, the first fixing member 1081 is passed through 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 is engaged 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 to the expansion beam 105, and at the same time, the first fixing member 1081 and the second fixing member 1082 are threadedly connected; it can be understood that the above-mentioned setting 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.

[0185] It is understandable that the above-mentioned embodiments of the present application regarding the thermal insulation arrangement 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.

[0186] For example, the first expansion beam B1 divides the internal space of the box body 101 into a first cavity 101a and a second cavity 101b. The battery 200 also includes a second expansion beam B2, which is arranged in the first cavity 101a. All battery cells 100 are sandwiched between the first expansion beam B1 and the second expansion beam B2. In the direction from the first cavity 101a to the second cavity 101b, the first heat exchange element 102 and the second expansion beam B2 are spaced apart to achieve a heat insulation arrangement between the first heat exchange element 102 and the second expansion beam B2, that is, the entire first heat exchange element 102 is spaced apart on the side of the second expansion beam B2 facing the second cavity 101b. It can be understood that a heat insulation 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.

[0187] 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 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. A battery cell 100 is provided between the first expansion beam B1 and the third expansion beam B3, and a battery cell 100 is also provided between the second expansion beam B2 and the third expansion beam B3. Then, a portion of the first heat exchange element 102 is provided on opposite sides of the third expansion beam B3. At this time, the third expansion beam B 3 and the box body 101, and the avoidance channel connects the above-mentioned opposite sides of the third expansion beam B3. For example, the box body 101 is formed with a third recess 101d, and / or the third expansion beam B3 is formed with a fourth recess. The third recess 101d and / or the fourth recess constitute the avoidance channel. The first heat exchange element 102 is arranged in the avoidance channel, and the portion of the first heat exchange element 102 that is arranged in the avoidance channel is spaced apart from the third expansion beam B3, so that the first heat exchange element 102 and the third expansion beam B3 are thermally insulated.

[0188] Exemplarily, the insulation between the first heat exchange element 102 and the third expansion beam B3 is the same as or different from the insulation between the first heat exchange element 102 and the expansion beam 105. Exemplarily, a third recess 101d is formed in the wall of the housing 101. The third recess 101d defines at least a portion of the escape passage, and the portion of the first heat exchange element 102 extending through the escape passage is located within the third recess 101d. Alternatively, the third expansion beam B3 is spaced from the wall of the housing 101, excluding the third recess 101d.

[0189] Please refer to Figures 15, 16 and 20. In some embodiments, the expansion beam 105 has a first recess 105a, which is configured as at least a portion 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, which is disposed in the avoidance channel 200a and has a second mating surface 106a that abuts against the battery cell 100. The first mating surface 105b is configured as a first mating surface 105b that abuts against the battery cell 100. 105b is arranged flush with the second mating surface 106a, for example, the first mating surface 105b and the second mating surface 106a can be located in the same plane; the 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, then 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 installation of the first heat exchange member 102 is completed.

[0190] 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.

[0191] 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.

[0192] In the above technical solution, by arranging a 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 plating caused by excessive deformation difference between the battery cell 100 at the position of the avoidance channel 200a and other positions. It is also beneficial to reduce the risk of the battery cell 100 rupturing the shell and leaking the electrolyte due to uneven force, thereby improving the reliability of the battery 200.

[0193] For example, the slot 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 slot 106b that is away from the expansion beam 105 is open; for example, 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, and the lower side of the slot 106b is open. At this time, the supporting member 106 can separate the first heat exchange member 102 and the expansion beam 105 so as to increase the thermal resistance between the first heat exchange member 102 and the expansion beam 105, which is beneficial to reduce the heat or cold transferred from the first heat exchange member 102 to the expansion beam 105.

[0194] Referring to Figures 14 and 15 , in some embodiments, a stopper 106c is formed on at least one of the expansion beam 105 and the box body 101. The stopper 106c abuts against the carrier 106 to limit the movement of the carrier 106 from the first cavity 101a toward the second cavity 101b. It is also understood that the stopper 106c can directly contact and engage with the carrier 106, or can indirectly abut against the carrier 106.

[0195] 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 carrier 106 in the direction from the first cavity 101a to the second cavity 101b, so as to achieve reliable positioning of the carrier 106 in the width direction of the expansion beam 105 (for example, the second direction X2 in Figure 3). At the same time, the stopper 106c can resist the expansion force exerted by the battery cell 100 on the carrier 106, which is conducive to improving the carrying capacity of the carrier 106, so that the carrier 106 can stably bear the battery cell 100, reducing the probability of the supporting 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 supporting member 106 by other means, such as at least one of the expansion beam 105 and the box body 101 is bonded to the supporting member 106, the above scheme is conducive to reducing the force borne by other connection methods between at least one of the expansion beam 105 and the box body 101 and the supporting member 106, and is conducive to improving the setting reliability and stability of the supporting member 106.

[0196] Please refer to Figures 14 and 16. In some embodiments, a stop portion 106c is formed on the 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, the wall of the box body 101 where the first heat exchange element 102 is provided is formed with a stop step 1011c protruding toward the expansion beam 105, and the stop step 1011c forms the stop portion 106c.

[0197] Exemplarily, as shown in Figure 14, the expansion beam 105 has a first recess 105a, and at least a portion of the edge portion of the first recess 105a corresponding to the side where the first cavity 101a is located is formed as a stop portion 106c; and / or, as shown in Figure 16, the wall of the box body 101 has a second recess 101c, and the bottom wall of the second recess 101c is formed with a stop step 1011c.

[0198] In the above technical solution, a stopper 106c is formed at the position of the avoidance space 200a on the side of the expansion beam 105 facing the first cavity 101a, so that the stopper 106c is defined by the structure of the expansion beam 105 itself to limit the position of the carrier 106, without the need for a separate setting, 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 carrier 106 "along 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 conducive to improving the convenience of assembly; by setting 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 define the stop portion 106c to achieve the limitation of the supporting member 106, without the need for a separate setting, which is conducive 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.

[0199] 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 exchange member 102 is set, and a stop step 1011c is formed on the groove wall of the second recess 101c.

[0200] Please refer to Figure 14. In some embodiments, on the cross section of the expansion beam 105, the stop portion 106c on the expansion beam 105 is formed as an arc structure, and the cross section of the expansion beam 105 is perpendicular to the length direction of the expansion beam 105 (for example, the first direction X1 in Figure 3).

[0201] In the above technical solution, the stopper 106c provided on the expansion beam 105 in the cross section thereof is formed into an arc-shaped structure. This allows the stopper 106c to restrict the movement of the support member 106 while also, to a certain extent, avoiding the portion of the support member 106 that cooperates with the stopper 106c. Furthermore, the stopper 106c is located on the side of the expansion beam 105 facing the first cavity 101a. This improves the ease with which the support member 106, due to cooperation with the stopper 106c, protrudes from the first mating surface 105b toward the first cavity 101a, thereby facilitating the flush arrangement of the second mating surface 106a with the first mating surface 105b. Furthermore, when the portion of the expansion beam 105 corresponding to the stopper 106c is an integrally formed bent plate, the stopper 106c can be located at the bend of the plate, enabling the stopper 106c to be directly formed during the forming process of the bent plate. This helps to save processing steps for the expansion beam 105, reduce processing difficulty, and improve production efficiency.

[0202] Please refer to Figures 14, 15 and 21-24. In some embodiments, the supporting member 106 includes a plate body 1061 and a matching portion 1062. The surface of one side of the thickness of the plate body 1061 is formed as a second matching surface 106a, and 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 supporting member 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.

[0203] In the above technical solution, by providing the carrier 106 with a plate body 1061 and a 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 limiting 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. At the same time, 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 its original position and / or original posture, it is convenient for the mating portion 1062 to adapt to the deformation of the expansion beam 105 and for the second mating surface 106a of the carrier 106 to adapt and adjust with the changes in the first mating surface 105b, which to a certain extent makes it easy for the second mating surface 106a and the first mating surface 105b to always be flush or have a small misalignment.

[0204] It can be understood that when the supporting member 106 includes a plate body portion 1061 and a matching portion 1062, if the box body 101 is also formed with a stop portion 106c, the plate body portion 1061 can be stopped and matched with the stop portion 106c on the box body 101; of course, when the supporting member 106 also includes the supporting portion 1064 described below, the stop portion 106c on the box body 101 can be stopped and matched with the supporting portion 106c.

[0205] Please refer to Figure 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 concave 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.

[0206] In the above technical solution, the first surface 1062a of the mating portion 1062 is provided to engage with the expansion beam 105. Due to the arc-shaped setting of the first surface 1062a, it is convenient to achieve the limited cooperation between the carrier 106 and the expansion beam 105, and at the same time, it is convenient to prevent the second surface 1062b from protruding from the second mating surface 106a toward the first cavity 101a, and will not affect the cooperation between the second mating surface 106a and the battery cell 100; of course, the second surface 1062b can also engage with the battery cell 100.

[0207] Exemplarily, the first surface 1062 a of the fitting portion 1062 is abutted against the stop portion 106 c of the expansion beam 105 . In the cross section of the expansion beam 105 , the first surface 1062 a and the stop portion 106 c are both formed in an arc shape.

[0208] Please refer to Figure 15. In some embodiments, at least one latch hole 200d is formed on the expansion beam 105, and the supporting member 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 facing 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.

[0209] Exemplarily, 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 of the box body 101, and a card hole 200d is formed on the part of the expansion beam 105 corresponding to the avoidance space 200a, and a part of the hook portion 1063 extends upward into the card hole 200d.

[0210] 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 escape from the avoidance channel along the direction from the second cavity 101b toward the first cavity 101a during the assembly 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.

[0211] For example, for a single latch hole 200d, the latch hole 200d may correspond to one or more latch hooks 1063, and the number of latch holes 200d may be equal to or different from the number of latch hooks 1063. For example, the plurality of latch hooks 1063 are spaced apart along the length of the expansion beam 105 to improve the reliability of the pre-limiting of the carrier 106.

[0212] Exemplarily, 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 of 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 provided at the other end of the cantilever portion. During the assembly process of the supporting component 106, the hook portion 1063 is engaged with the avoidance space 200a along the direction of the first cavity 101a toward the second cavity 101b, and the hook portion 1063 is squeezed and deformed by the expansion beam 105. The supporting component 106 continues to move toward the second cavity 101b until the hook portion 1063 is engaged in the hook hole 200d.

[0213] Please refer to Figures 15 and 21-24. In some embodiments, the carrier 106 also includes at least one support portion 1064, which is arranged on the side of the plate portion 1061 away from the second mating surface 106a, and the support portion 1064 is arranged to avoid the first heat exchange component 102. The support portion 1064 can be spaced apart from the groove 106b, and the support portion 1064 is stopped and matched with the box body 101.

[0214] The support portion 1064 is positioned to avoid the first heat exchange element 102. This means that, in the thickness direction of the plate portion 1061, the orthographic projection of the support portion 1064 is located outside the orthographic projection outer contour of the groove wall of the slot 106b. For example, the mating portion 1062 abuts against the stopper 106c of the expansion beam 105, while the support portion 1064 abuts against the housing 101 (e.g., the stopper 106c on the housing 101 described above).

[0215] 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-and-stop fit between the plate body 1061 and the battery cell 100; and the support portion 1064 and the box body 101 stop-and-stop fit, it is convenient to disperse 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 load-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 more evenly. 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, which facilitates the convenient assembly of the carrier 106.

[0216] Exemplarily, the support portion 1064 can be configured as follows: the support portion 1064 and the box body 101 stop abutting in the direction from the first cavity 101a to the second cavity 101b, and / or the support portion 1064 and the box body 101 stop abutting in the thickness direction of the first heat exchange member 102 (for example, the fifth direction X5 in FIG. 7 , the fifth direction X5 can be the height direction of the battery cell 100), that is, in the normal direction of the wall of the box body 101 where the first heat exchange member 102 is provided; for example, in combination with FIG. 7 and FIG. 10 , the box body 101 The bottom wall 1011a is provided with a first heat exchange element 102, an expansion beam 105 is provided on the upper side of the bottom wall 1011a of the housing 101, the first cavity 101a and the second cavity 101b are arranged sequentially along the first direction X1, and the support portion 1064 can abut against the bottom wall 1011a of the housing 101 in the second direction X2 (for example, the support portion 1064 abuts against the stop step 1011c on the housing 101), and / or the support portion 1064 abuts against the bottom wall 1011a of the housing 101 in the fifth direction X5. The first and second directions respectively intersect with the fifth direction. For example, the first, second, and fifth directions are perpendicular to each other.

[0217] Exemplarily, there are a plurality of support portions 1064 , and each slot 106 b is provided with at least one support portion 1064 on both sides in the length direction (eg, the first direction X1 in FIG. 1 ) of the expansion beam 105 .

[0218] 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 exchange element 102, and the width of the support portion 1064 at one end facing the wall of the box body 101 where the first heat exchange element 102 is arranged is the largest, and the width of the support portion 1064 at one end facing the matching portion 1062 is the smallest.

[0219] 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.

[0220] 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 less material to increase the abutment matching 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.

[0221] 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 of the supporting member 106 in the width direction of the expansion beam 105, it can also limit the rotation of the supporting member 106, which is beneficial to improving the stability of the supporting member 106 against the battery cell 100.

[0222] In some embodiments, the support member 106 is disposed between the first heat exchange member 102 and the expansion beam 105, such that the first heat exchange member 102 and the expansion beam 105 are separated by the support member 106. In this case, the side of the slot 106b facing the wall of the housing 101 where the first heat exchange member 102 is disposed is open. The thermal conductivity of the support member 106 is lower than that of the expansion beam 105, and / or the support member 106 is spaced apart from the first heat exchange member 102 to achieve thermal insulation between the support member 106 and the first heat exchange member 102.

[0223] For example, the first heat exchanger 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, the supporting member 106 is arranged in the avoidance space 200a, the lower side of the slot 106b is open, and the first heat exchanger 102 is passed through the slot 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.

[0224] In the above technical solution, the carrier 106 is arranged between the first heat exchange member 102 and the expansion beam 105. 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 is spaced apart from the first heat exchange member 102, which is beneficial to increase the thermal resistance between the first heat exchange member 102 and the expansion beam 105, and reduce the heat exchange between the expansion beam and the first heat exchange member 102. To a certain extent, it is beneficial to increase the proportion of heat or cold transferred from the first heat exchange member 102 to the battery cell 100, thereby improving the thermal management performance. In addition, when the carrier 106 is spaced apart from the first heat exchange member 102, the risk of interference between the carrier 106 and the first heat exchange member 102 can be reduced during assembly of the carrier 106, thereby improving the installation convenience of the carrier 106.

[0225] In some embodiments, the strength of the material of the support member 106 is at least 0.8 times the strength of the material of the expansion beam 105. For example, the strength of the material of the support member 106 is 0.8, 0.85, 0.9, 1, etc. times the strength of the material of the expansion beam 105.

[0226] Illustratively, the material of the supporting 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 supporting member 106 is a plastic member, but the present invention is not limited thereto.

[0227] 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 .

[0228] Please refer to Figure 14. In some embodiments, the first heat exchange element 102 is arranged on the bottom wall 1011a of the box body 101, and the end of the second mating surface 106a facing the first heat exchange element 102 is arranged flush with the end of the battery cell 100 facing the corresponding first heat exchange element 102, or, the end of the second mating surface 106a facing the first heat exchange element 102 is arranged adjacent to the first heat exchange element 102 compared to the end of the battery cell 100 facing the corresponding first heat exchange element 102.

[0229] It can be seen that when the first heat exchange element 102 is arranged on 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.

[0230] In the above technical solution, by setting the end of the second mating surface 106a facing the first heat exchanger 102 to be flush with the end of the battery cell 100 facing the corresponding first heat exchanger 102, or, the end of the second mating surface 106a facing the first heat exchanger 102 is set 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.

[0231] Please refer to Figure 6. In some embodiments, the first heat exchange element 102 includes at least one heat exchange tube 1, and a heat exchange channel 10 is defined in the heat exchange tube 1. 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.

[0232] 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 a 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. The water-cooled plate usually includes two stacked plates, which are welded and fixed to define a flow channel. For this reason, the thickness of the water-cooled plate is usually thick glue, 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 102, while saving the space occupied by the first heat exchange component 102, and facilitating the improvement of the energy density of the battery 200 when the first heat exchange component 102 is arranged in the box 101.

[0233] In the embodiments of the present application, the harmonica tube can be understood as a flat tube having at least one partitioning structure added thereto to divide the interior of the flat tube into multiple flow channels, with each channel's two ends respectively communicating with the liquid inlet and liquid outlet of the heat exchange tube 1. The multiple flow channels can be spaced apart along the width of the flat tube; alternatively, the multiple flow channels can be arranged in multiple rows and columns along the width and thickness of the flat tube.

[0234] 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 conducive 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.

[0235] Please refer to Figures 25 to 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.

[0236] For example, the battery 200 may include multiple battery cells 100 , and the first heat exchange tube 1 a is used to exchange heat with the multiple battery cells 100 of the battery 200 , so that the temperature of the battery 200 can be limited to a reliable operating temperature, thereby achieving reliable operation of the battery 200 .

[0237] 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 on 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.

[0238] 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.

[0239] The first heat exchange section 121 is bent and arranged in the U-shaped area 120, that is, the first heat exchange section 121 is arranged in the space enclosed by the second heat exchange section 122, and the first heat exchange section 121 extends along a non-straight line on the inner side of the second heat exchange section 122, and has at least one bending position.

[0240] It should be noted that this embodiment only limits the first heat exchange section 121 to being bent and disposed within the U-shaped region 120, and does not limit the bending form of the first heat exchange section 121. That is, the specific bending form of the first heat exchange section 121 can be designed according to the heat exchange requirements of the battery 200. For example, the first heat exchange section 121 can extend along the length direction of the battery cell 100 (i.e., the first direction X1 in FIG. 3 ), and after extending to a certain length, bend toward the width direction of the battery cell 100 (i.e., the second direction X2 in FIG. 3 ), and then continue to extend along the length direction of the battery cell 200 and bend along the width direction. Alternatively, the first heat exchange section 121 can extend along the width direction of the battery cell 100, and after extending to a certain length, bend toward the length direction of the battery cell 100, and then continue to extend along the width direction of the battery cell 100 and bend along the length direction.

[0241] 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.

[0242] For example, 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 the other end 11 can be connected to the end of the second heat exchange section 122 away from the first heat exchange section 121. Thus, 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.

[0243] It is understandable that as the heat exchange medium flows through the first heat exchange tube 1a, its temperature gradually changes, resulting in a gradual decrease in the heat exchange efficiency. For example, when the first heat exchange tube 1a cools and dissipates heat from the battery cells 100, the heat from the battery cells 100 is gradually transferred to the heat exchange medium, causing the temperature of the heat exchange medium to gradually increase as it flows through the first heat exchange tube 1a, the temperature difference between the heat exchange medium and the battery cells 100 gradually decreases, and the heat exchange efficiency gradually decreases. When the first heat exchange tube 1a heats and raises the temperature of the battery cells 100, the heat in the heat exchange medium is gradually transferred to the battery cells 100, causing the temperature of the heat exchange medium to gradually decrease as it flows through the first heat exchange tube 1a, the temperature difference between the heat exchange medium and the battery cells 100 gradually decreases, and the heat exchange efficiency gradually decreases.

[0244] 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.

[0245] When the first heat exchange tube 1a heats up 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. For example, 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 battery cells 100 at the middle may be cooled. 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. Therefore, the heat exchange medium first heats the battery cells 100 at the periphery of the battery 200, and then The higher temperature heat exchange medium can increase the temperature of the peripheral battery cells 100 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 in the middle position have less contact area with the external environment and less heat loss. The lower temperature heat exchange medium flowing in the first heat exchange section 121 can cooperate with the heat generated by the battery cells 100 themselves to meet their heating needs well. 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.

[0246] In the above 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 compensate 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.

[0247] Exemplarily, 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.

[0248] For example, 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. As a result, 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.

[0249] For example, as shown in FIG4 , multiple heat exchange tubes 1 are arranged at intervals along a first direction. The two heat exchange tubes 1 at both ends of the first direction X1 are both first heat exchange tubes 1a. Furthermore, the two first heat exchange tubes 1a are symmetrically arranged about the centerline L extending along the second direction X2 of the first heat exchange element 102. It is understood that arranging the second heat exchange section 122 of the first heat exchange tube 1a at the periphery can improve the temperature uniformity inside and outside the battery assembly. Therefore, forming the two heat exchange tubes 1 at both ends of the first direction into first heat exchange tubes 1a can improve the temperature uniformity of the battery cells 100 at both ends of the battery assembly in the first direction, thereby achieving uniform temperature for the entire battery assembly. Thus, by providing two symmetrically arranged first heat exchange tubes 1, liquid can be simultaneously fed into both sides, increasing the liquid flow rate, shortening the length of a single heat exchange channel, and reducing the pressure drop within a single heat exchange channel, thereby improving heat exchange efficiency.

[0250] Furthermore, the medium flow direction and the inlets and outlets of the two heat exchange tubes 1 at both ends of the first direction are arranged symmetrically, so that the two first heat exchange tubes 1a can synchronously exchange heat at both ends of the battery assembly in the first direction, resulting in a better temperature equalization effect.

[0251] 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.

[0252] Please refer to Figures 25 to 29. In some embodiments, the first heat exchange section 121 includes a first heat exchange part 1211 and a first bending part 1212. There are multiple first heat exchange parts 1211, and the multiple first heat exchange parts 1211 are arranged at intervals along the first direction. Each first heat exchange part 1211 extends along the second direction. The first bending part 1212 is bent and connected between two adjacent first heat exchange parts 1211, so that the multiple first heat exchange parts 1211 are connected in sequence, and the second direction is set at an angle to the first direction.

[0253] It should be noted that the shape of the first heat exchange portion 1211 can be diverse. For example, the first heat exchange portion 1211 can be straight or curved. Thus, by sequentially bending and connecting multiple first heat exchange portions 1211, the first heat exchange section 121 can form an S-shaped, X-shaped, or V-shaped heat exchange channel. The shape of the first bend portion 1212 can be an arc or a broken line. The phrase "the first direction and the second direction are arranged at an angle" is intended to indicate that the first and second directions can be arranged perpendicularly or intersectingly, but not perpendicularly. 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, as shown in Figure 25, the first direction is the length of the battery cell 100, and the second direction is the thickness of the battery cell 100. Thus, by bending and connecting multiple first heat exchange portions 1211, an S-shaped heat exchange channel can be formed, enabling heat exchange between multiple battery cells 100.

[0254] In the above embodiment, on the one hand, by providing multiple 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, thereby improving the heat exchange effect of the first heat exchange tube 1a; on the other hand, since the internal battery cells 100 are wrapped by the external battery cells 100, the temperature difference between the internal battery cells 100 is not large. Therefore, by providing multiple 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.

[0255] It is understood that the first bend 1212 is arc-shaped, and the fluid flow directions at both ends of the first bend 1212 form a certain angle. Thus, the first bend 1212 can change the flow direction of the fluid, thereby allowing the two connected first heat exchange sections 1211 to be extended and arranged within a preset area, thereby increasing the heat exchange area of ​​the first heat exchange section 121 and improving the heat exchange efficiency of the first heat exchange section 121. At the same time, the first bend 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, it can also make the structure of the first heat exchange tube 1a more compact and occupy a smaller space, facilitating the miniaturization design of the battery 200.

[0256] For example, the first bend 1212 is semicircular in shape to connect two parallel and spaced-apart first heat exchange sections 1211. This increases the design diversity of the heat exchange channel 10 and improves the compatibility of the first heat exchange tube 1a with multiple battery cells 100. The structure is simple and easy to manufacture. Of course, the bending angle of the first bend 1212 can be adjusted as needed, for example, to 150° or 135°.

[0257] In addition, the number of the first bends 1212 can be one, two, three or more. The first bends 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.

[0258] Please refer to Figures 25 to 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, and the second end of the third heat exchange part 1222 is connected to the first heat exchange section 121 at an angle. The fourth heat exchange part 1223 is in communication with the second heat exchange part 1221 and is connected to the second heat exchange part 1221 at an angle. The fourth heat exchange part 1223 extends along the third side circumference of the first heat exchange section 121.

[0259] 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.

[0260] The first end of the third heat exchange portion 1222 is connected to the second heat exchange portion 1221 at an angle. That is, the third heat exchange portion 1222 is connected to the second heat exchange portion 1221, and the third heat exchange portion 1222 and the second heat exchange portion 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 portion 1222 and the second heat exchange portion 1221 can be connected at an angle of 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0261] The second end of the third heat exchange portion 1222 is connected to the first heat exchange section 121 at an angle; that is, the second end of the third heat exchange portion 1222 is connected to the second heat exchange portion 1221, and the second end of the third heat exchange portion 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 portion 1222 can be connected to the first heat exchange section 121 at an angle of 30°, 45°, 60°, 90°, 120°, 135°, 150°, and so on.

[0262] The fourth heat exchange portion 1223 is connected to the second heat exchange portion 1221 and is connected to the second heat exchange portion 1221 at an angle. That is, the fourth heat exchange portion 1223 is connected to the second heat exchange portion 1221 and is arranged at an angle greater than 0° and less than 180°. For example, the fourth heat exchange portion 1223 is connected to the second heat exchange portion 1221 at an angle of 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0263] 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.

[0264] In the above 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, and thus facilitating the improvement of the volume energy density of the battery 200. At the same time, the structure of the first heat exchange tube 1a can also be simplified, facilitating the processing and production of the first heat exchange component 102.

[0265] Please refer to Figures 25 to 29. In some embodiments, the first heat exchange section 121 includes a plurality of first heat exchange parts 1211. The plurality of first heat exchange parts 1211 are bent and connected in sequence in the first direction. Among them, the second heat exchange part 1221 is located on one side of the multiple first heat exchange parts 1211 along the first direction, the third heat exchange part 1222 is located on one side of the multiple first heat exchange parts 1211 along the second direction, and the first direction and the second direction are arranged at an angle; the first end of the third heat exchange part 1222 is connected to one end of the second heat exchange part 1221 along the second direction, and the second end of the third heat exchange part 1222 is connected to the 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.

[0266] The plurality of first heat exchange portions 1211 are connected by bending in sequence in the first direction. That is, the plurality of first heat exchange portions 1211 are arranged sequentially in the first direction, and two adjacent and connected first heat exchange portions 1211 are connected by bending in the first direction. The first heat exchange portions 1211 may extend along a straight line parallel to the second direction, along a straight line arranged at an angle to the second direction, or along a curve and / or a broken line in the second direction.

[0267] 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 multiple first heat exchange parts 1211 are arranged at intervals along the first direction and bent 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 and 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.

[0268] Taking the first heat exchange tube 1a arranged in the first direction away from the coordinate origin in Figure 25 as an example, the first heat exchange part 1211 extends straightly along the second direction, and 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 in the first direction and extends straightly in the second direction, and is used to exchange heat with the edge of the side of the multiple battery cells 100 away from the coordinate origin 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 to exchange heat with the edge of the side of the multiple battery cells 100 close to the coordinate origin in the second direction. 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 to exchange heat with the edge of the side of the multiple battery cells 100 away from the coordinate origin in the second direction.

[0269] In the above embodiment, multiple first heat exchange parts 1211 are set up to be 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, 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 fourth heat exchange part 1223 is located on the other side of the multiple 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 defined, the layout of the first heat exchange tube 1a is further defined, the structure of the first heat exchange tube 1a is simplified, and processing and manufacturing are facilitated.

[0270] For example, the third heat exchange section 1222 and the fourth heat exchange section 1223 extend in the first direction, while the first heat exchange section 1211 and the second heat exchange section 1221 both extend in the second direction. This can facilitate the circuitous arrangement of the first heat exchange tube 1a, thereby reducing the difficulty in producing the first heat exchange tube 1a and lowering the production cost of the first heat exchange element 102. Furthermore, the third heat exchange section 1222 and the fourth heat exchange section 1223 can both extend in a straight line in the first direction, while the first heat exchange section 1211 and the second heat exchange section 1221 can both extend in a straight line in the second direction. The linear structure is simple, easy to produce, and convenient to arrange, thereby further reducing the production complexity and cost of the first heat exchange channel 10.

[0271] For example, as shown in FIG25 , the third heat exchange section 1222 and the fourth heat exchange section 1223 both extend along the first direction. In the first direction, the length b1 of the fourth heat exchange section 1223 is less than or equal to the length a1 of the third heat exchange section 1222. When the length b1 of the fourth heat exchange section 1223 is equal to the length a1 of the third heat exchange section 1222, the fourth heat exchange section 1223, the second heat exchange section 1221, and the third heat exchange section 1222 are sequentially connected to form a standard U-shaped flow channel. The two ends of the U-shaped region 120 have similar dimensions, which facilitates controlling the temperature difference between the battery cells 100 at both ends in the second direction and improves temperature uniformity. When the length b1 of the fourth heat exchange section 1223 is less than the length a1 of the third heat exchange section 1222, this facilitates avoiding other flow channel sections, other heat exchange channels, or other components of the first heat exchange tube 1a, thereby facilitating the layout of the first heat exchange tube 1a and achieving a compact structure.

[0272] 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. For example, 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. In other words, the other end of the fourth heat exchange portion 1223 extends to be flush with the first heat exchange portion 1211 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 farthest from the second heat exchange portion 1221, or the other end of the fourth heat exchange portion 1223 extends beyond the first heat exchange portion 1211 farthest from the second heat exchange portion 1221.

[0273] 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. At the same time, it is also beneficial to the layout of the first heat exchange tube 1a.

[0274] Please refer to Figure 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; the first end of the third heat exchange part 1222 is connected to the second heat exchange part 1221 along the first direction. One end of the third heat exchange part 1222 is connected in the first direction, the second end of the third heat exchange part 1222 is connected to the one of the multiple first heat exchange parts 1211 that is closest to the third heat exchange part 1222 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 first direction, one end of 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, 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.

[0275] The plurality of first heat exchange portions 1211 are connected by bending in sequence in the first direction. That is, the plurality of first heat exchange portions 1211 are arranged sequentially in the first direction, and two adjacent and connected first heat exchange portions 1211 are connected by bending in the first direction. The first heat exchange portions 1211 may extend along a straight line parallel to the second direction, along a straight line arranged at an angle to the second direction, or along a curve and / or a broken line in the second direction.

[0276] 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 multiple first heat exchange parts 1211 are arranged at intervals along the first direction and bent 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.

[0277] In the above embodiment, by arranging the second heat exchange part 1221 to be located on one side of the multiple first heat exchange parts 1211 along the second direction, the third heat exchange part 1222 to be located on one side of the multiple 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 multiple 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.

[0278] For example, as shown in Figure 27, the first heat exchange portion 1211, the third heat exchange portion 1222, and the fourth heat exchange portion 1223 extend along the second direction, while the second heat exchange portion 1221 extends along the first direction. Furthermore, the first heat exchange portion 1211, the third heat exchange portion 1222, and the fourth heat exchange portion 1223 extend linearly along the second direction, while the second heat exchange portion 1221 extends linearly along the first direction. The linear structure is simple, easy to manufacture, and convenient to arrange, thereby further reducing the production complexity and cost of the first heat exchange channel 10.

[0279] For example, the second heat exchange section 1221 and the third heat exchange section 1222 are transitionally connected via an arcuate bend, and the third heat exchange section 1222 and the first heat exchange section 1211 are transitionally connected via an arcuate bend. This changes the flow direction of the heat exchange medium, allowing the second heat exchange section 122 to extend within a predetermined area and function as a heat exchanger with the battery cell 100. Furthermore, the arcuate bend reduces fluid flow resistance and pressure drop, thereby increasing the flow rate of the heat exchange medium and further enhancing heat exchange efficiency. For example, 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 is changed from the original flow direction to perpendicular to the original flow direction; at the same time, the arc shape can also reduce the resistance to 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.

[0280] Please refer to Figures 25 and 26. In some embodiments, the second heat exchange section 122 also includes a fifth heat exchange section 1224, which extends along the fourth side periphery of the first heat exchange section 121, and the fifth heat exchange section 1224 closes at least part of the opening of the U-shaped area 120 formed by the second heat exchange section 121, the third heat exchange section 122 and the fourth heat exchange section 125. Then, one of the above-mentioned first heat exchange sections 1211 can extend along the fourth side periphery of the first heat exchange section 121.

[0281] It can be understood that the fifth heat exchange portion 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. In this way, 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 heat exchange requirements, thereby optimizing the heat exchange structure and improving the heat exchange efficiency.

[0282] In the above embodiment, by providing the fifth heat exchange portion 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 be used to 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 improving the temperature uniformity of the battery 200.

[0283] Illustratively, the fifth heat exchange portion 1224 is arranged opposite to the first heat exchange portion 1221, and the fifth heat exchange portion 1224 extends along the second direction, the fifth heat exchange portion 1224 is connected between the second end of the third heat exchange portion 1222 and the first heat exchange section 111, and the fifth heat exchange portion 1224 is connected to the third heat exchange portion 1222 at an angle, and the fifth heat exchange portion 1224 is connected to the first heat exchange section 111 at an angle.

[0284] It should be noted that, in the embodiment 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 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°.

[0285] 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, which can enable the first heat exchange tube 1a to preferentially exchange heat on the outer circumference of the battery assembly, thereby helping 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.

[0286] 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.

[0287] For example, 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.

[0288] 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 less contact area with the external environment and less heat loss. The lower temperature heat exchange medium flowing in the first heat exchange section 121 can cooperate with the heat generated by the battery cells 100 themselves to well meet their heating needs. 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, and 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 after heating are relatively consistent, making the temperature distribution inside the battery 200 more uniform.

[0289] When cooling the battery components 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.

[0290] 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 portion of the battery assembly to the edge portion 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 position 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 position 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 position 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.

[0291] Please refer to Figures 27 to 29. In some embodiments, the first heat exchange element 102 also includes a second heat exchange tube 1b. The second heat exchange tube 1b and the first heat exchange tube 1a are arranged on the same side of the battery cell 100. At least a 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. The bending structures of the second heat exchange tube 1b and the first heat exchange tube 1a are the same or different.

[0292] 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.

[0293] 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.

[0294] 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.

[0295] 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 the 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.

[0296] 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 the one of the multiple first heat exchange parts 1211 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.

[0297] Please refer to Figure 29. In some embodiments, the second heat exchange tube 1b includes a U-shaped area 120 with the same structure as the first heat exchange tube 1a. 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 second heat exchange tube 1b, then 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 second heat exchange tube 1b, or the entire first heat exchange tube 121 of the first heat exchange tube 1a is arranged in the U-shaped area 120 of the second heat exchange tube 1b.

[0298] In the above technical solution, by arranging at least part of the first heat exchange section 121 of the first heat exchange tube 1a in the U-shaped area 120 of the second heat exchange tube 1b, the first heat exchange tube 1a and the second heat exchange tube 1a can be arranged around each other. In this way, the winding 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 component 102 and improving the temperature uniformity of the battery 200.

[0299] Please refer to Figure 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. The third heat exchange section 123 and the fourth heat exchange section 124 are respectively bent to form a U-shaped area 120. The third heat exchange section 123 is arranged in the U-shaped area 120 of the fourth heat exchange section 124, and at least 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.

[0300] In the embodiment of the present application, the opening orientation of the U-shaped region 120 of the third heat exchange segment 123 may be the same as or different from the opening orientation of the U-shaped region 120 of the fourth heat exchange segment 124. For example, the opening orientation of the U-shaped region 120 of the third heat exchange segment 123 is the same as the opening orientation of the U-shaped region 120 of the fourth heat exchange segment 124. In this case, the three heat exchange segments of the third heat exchange segment 123 and the three heat exchange portions of the fourth heat exchange segment 124 can be arranged in parallel, respectively, to simplify the arrangement of the second heat exchange tube 1b and to provide a clearance for at least a portion of the first heat exchange segment 121 of the first heat exchange tube 1a to extend into the U-shaped region 120 of the third heat exchange segment 123.

[0301] 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.

[0302] For example, as shown in Figure 29, 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.

[0303] Illustratively, 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.

[0304] Please refer to Figure 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 part 1252. There are multiple sixth heat exchange parts 1251. 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 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, and the fourth direction is set at an angle to the third direction; illustratively, the fourth direction is perpendicular to the third direction.

[0305] 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). Thus, the fifth heat exchange section 125 is provided at at least one of the two ends of the length of the third heat exchange section 123. The fifth heat exchange section 125 can be provided within the U-shaped region 120 of the fourth heat exchange section 124 and outside the U-shaped region 120 of the third heat exchange section 123.

[0306] For example, the second bend 1252 is arc-shaped, with the fluid flow directions at both ends of the second bend 1252 forming a certain angle. Thus, the second bend 1252 can change the fluid flow direction, thereby allowing the two connected sixth heat exchange sections 1251 to be arranged in an extended manner within a predetermined 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. Furthermore, the second bend 1252 is arc-shaped, and this arc shape can reduce the flow resistance of the fluid and reduce pressure drop, thereby increasing the flow rate of the fluid and further increasing the heat exchange efficiency of the fifth heat exchange section 125. Furthermore, this can make the structure of the second heat exchange tube 1b more compact and occupy less space, facilitating the miniaturization of the battery 200.

[0307] For example, the second bend 1252 is semicircular in shape to connect the two parallel and spaced-apart sixth heat exchange sections 1251. This increases the design diversity of the heat exchange channel 10, improves the compatibility of the second heat exchange tube 1b with multiple battery cells 100, and provides a simple structure for easy production. Of course, the bending angle of the second bend 1252 can be adjusted as needed, for example, to 150° or 135°.

[0308] 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.

[0309] 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 conducive to achieving 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.

[0310] Exemplarily, 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.

[0311] Please refer to Figure 29. In some embodiments, the first heat exchange element 102 also includes a third heat exchange tube 1c. At least a portion of the third heat exchange tube 1c is bent and arranged in the U-shaped area 120 of the second heat exchange tube 1b. Then, the above-mentioned at least portion of the third heat exchange tube 1c is non-straight.

[0312] In the above technical solution, at least part of the third heat exchange tube 1c is bent and arranged in the U-shaped area 120 of the second heat exchange tube 1b, so as 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 the improvement of the temperature uniformity of the battery 200.

[0313] 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.

[0314] In the embodiment of the present application, the bending configuration of the portion of the third heat exchange tube 1c disposed within the U-shaped region 120 of the second heat exchange tube 1b is not specifically limited. For example, the third heat exchange tube 1c may be substantially S-shaped, but is not limited thereto. For example, as shown in FIG29 , the third heat exchange tube 1c includes a sixth heat exchange segment 126 and a seventh heat exchange segment 127 . The sixth heat exchange segment 126 is bent to form the U-shaped region 120 . The seventh heat exchange segment 127 is bent within the U-shaped region 120 of the sixth heat exchange segment 126 , and the seventh heat exchange segment 127 is bent and connected to the sixth heat exchange segment 126 .

[0315] Exemplarily, 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 is 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.

[0316] Please refer to Figure 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 parts 1052a. The plurality of connection parts 1052a include a first connection part 1052b and a second connection part 1052c. The first connection part 1052b and the second connection part 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. The first connection part 1052b and the second connection part 1052c are staggered.

[0317] 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 staggered. Then, one of the two adjacent connection parts 1052a is the first connection part 1052b, and the other is the second connection part 1052c.

[0318] 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 multiple 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.

[0319] Exemplarily, the beam body 1051 is connected to the reinforcing partition 1052 on both sides in the width direction, 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 direction of the expansion force 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.

[0320] Please refer to Figure 15. In some embodiments, the beam body 1051 includes a first plate body A1 and a second plate body A2 arranged opposite to each other. 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.

[0321] For example, the first plate A1, the second plate A2, and the reinforcing baffle 1052 extend along the length of the expansion beam 105. The first plate A1, the reinforcing baffle 1052, and the second plate A2 can be stacked along the width of the expansion beam 105, which facilitates the assembly of the expansion beam 105. Furthermore, the provision of the third connecting portion 1052d helps improve the reliability of the connection between the reinforcing baffle 1052 and the beam 1051. It can be seen that the first connecting portion 1052b can be connected to the first plate A1, and the second connecting portion 1052c can be connected to the second plate A2.

[0322] 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 also the expansion beam 105 has a simple structure, is easy to assemble, and has good structural stability.

[0323] Please refer to Figures 10 and 15. In 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 is connected to the third fixing member 111 and the fourth fixing member 112, respectively.

[0324] In the above technical solution, by providing the pull rope 110 connected to the third fixing member 111 and the pull rope 110 connected to the fourth fixing member 112, when the battery cell 100 between the first expansion beam B1 and the second expansion beam B2 expands and deforms, the pull rope 110 can apply a force to the first expansion beam B1 and the second expansion beam B2 to resist the expansion force of the battery cell 100; moreover, 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, causing the pull rope 110 to fail.

[0325] Exemplarily, when there are multiple expansion beams 105 including a first expansion beam B1 and a second expansion beam B2, an avoidance channel 200a can 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 between the box body 101.

[0326] Of course, the structure of the expansion beam 105 is not limited thereto.

[0327] Referring to Figures 3, 10, and 20, in some embodiments, the housing 101 includes a first housing 101, which is a one-piece stamped part and includes a bottom wall 1011a and a surrounding wall 1011b. The surrounding wall 1011b is disposed 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 element 102 is disposed 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 element 102 is disposed between the top wall of the housing 101 and the battery cell 100.

[0328] It can be understood that the surrounding wall 1011b can include multiple side walls connected end to end, and the surrounding wall 1011b and the bottom wall 1011a can cooperate to form a accommodating space, which can be formed as at least 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.

[0329] 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.

[0330] In the above technical solution, by setting the first box body 101 including the bottom wall 1011a and the surrounding wall 1011b as an integral stamped part, the molding of the first box body 101 is facilitated, which is beneficial to reducing the cost of the first box body 101 and making the first box body 101 have good structural strength; at the same time, the structure of the first box body 101 itself realizes the sealing between the bottom wall 1011a and the surrounding wall 1011b, which is beneficial to improving the sealing of the bottom of the first box body 101, thereby saving multiple connecting parts (such as bolts) in the box body 101 for realizing the sealing of the bottom of the first box body 101, saving the connection process of the bottom wall 1011a and the surrounding wall 1011b, and helping to improve the assembly efficiency of the box body 101.

[0331] Secondly, embodiments of the present application provide an electrical device 1000 comprising the aforementioned battery 200, which is configured to provide electrical energy. In the aforementioned technical solution, since the electrical device 1000 utilizes the aforementioned battery 200, it facilitates good temperature control of the battery 200, thereby improving the reliability of the electrical device 1000.

[0332] Please refer to the accompanying drawings again to describe the battery 200 according to a specific embodiment of the present application.

[0333] Example 1

[0334] With reference to Figures 3-6 and 25, the battery 200 includes a housing 101, an expansion beam 105, and a plurality of battery cells 100. All battery cells 100 are disposed within the housing 101. The battery 200 also includes a first heat exchange element 102. The first heat exchange element 102 and the expansion beam 105 are spaced apart within the housing 101 to provide thermal insulation between the first heat exchange element 102 and the expansion beam 105. The first heat exchange element 102 is located between the housing 101 and the battery cells 100 to facilitate heat exchange with all battery cells 100. The housing 101 includes a first housing 101 and a second housing 102. The first housing 101 is a one-piece sheet metal stamped part and includes a bottom wall 1011a and a surrounding wall 1011b. The surrounding wall 1011b surrounds the bottom wall 1011a. The first heat exchange element 102 is located between the bottom wall 1011a and the battery cells 100.

[0335] There are two expansion beams 105: a first expansion beam B1 and a second expansion beam B2. The first expansion beam B1 divides the interior space of the housing 101 into a first chamber 101a and a second chamber 101b. The second expansion beam B2 is located in the first chamber 101a. All battery cells 100 are located in the first chamber 101a and between the first expansion beam B1 and the second expansion beam B2. An escape channel 200a is formed between the first expansion beam B1 and the housing 101. The first heat exchange element 102 is disposed in a corresponding escape channel 200a, extending from the first chamber 101a to the second chamber 101b. The wall of the first expansion beam B1 corresponding to the escape channel 200a is spaced apart from the first heat exchange element 102. The housing 101 has a first recess 101c, and the second recess 101c forms at least a portion of the escape channel 200a. Of course, the first heat exchange element 102 may also be disposed through a plurality of avoidance channels 200a.

[0336] 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 except the portion corresponding to the avoidance channel 200a and the first expansion beam B1.

[0337] The first heat exchange element 102 includes two heat exchange tubes 1, each heat exchange tube 1 has two ends 11, which are a first end 11a and a second end 11b respectively. The circumferential side of the first heat exchange element 102 includes two sides arranged opposite to each other along the first direction X1 and two sides arranged opposite to each other along the second direction X2. The first box body 101 and the second box body 102 are arranged opposite to each other along the fifth direction X5.

[0338] For example, the first direction X1 is from left to right, the second direction X2 is from back to front, and the fifth direction X5 is from bottom to top. The three directions are perpendicular to each other:

[0339] The two heat exchange tubes 1 of the first heat exchange element 102 are spaced apart in the left-right direction. Each heat exchange tube 1 is formed by bending a single tube, with an arc-shaped bend at the bend. Each heat exchange tube 1 is a flat tube or harmonica tube, and the thickness direction of the heat exchange tube 1 is the X5 direction. Each heat exchange tube 1 also includes a connecting section 12 connecting 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 cells 100.

[0340] Each heat exchange tube 1 is configured as a first heat exchange tube 1a. 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 region 120. The first heat exchange section 121 is bent and disposed within the U-shaped region of the second heat exchange section 122, and the first heat exchange section 121 is bent and connected to the second heat exchange section 122. The connecting sections 12 of the two heat exchange tubes 1 can be arranged symmetrically about the centerline of the first heat exchange element 102, which is perpendicular to the left-right direction.

[0341] 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 they are 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.

[0342] 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), a first end of the third heat exchange portion 1222 is connected to the second heat exchange portion 1221 at a substantially 90° angle, a second end of the third heat exchange portion 1222 is connected to the first heat exchange section 121 at a substantially 90° angle, 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 circumference 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 circumference 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.

[0343] 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.

[0344] Example 2

[0345] 7 to 10 and 29 , the structure of this embodiment is substantially the same as that of the first embodiment, wherein the same components are designated by 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 component 102 further includes a current collector 2, the current collector 2 corresponds one-to-one to the avoidance channel 200a, the current collector 2 is connected to a plurality of ends 11 and is provided in the second cavity 101b, and the avoidance channel 200a is configured to allow the current collector 2 to pass through.

[0346] The battery 200 also includes a third expansion beam B3, which is spaced between the first expansion beam B1 and the second expansion beam B2. The box body 101 is formed with a third recess 101d, and the third recess 101d is configured as an avoidance space. The part of the first heat exchange element 102 provided in the first cavity 101a is passed through the avoidance space. The third expansion beam B3 is spaced from the first heat exchange element 102 to achieve thermal insulation, and the third expansion beam B3 is in contact with the wall of the box body 101 except for the third recess 101d.

[0347] 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 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. There are multiple first heat exchange portions 1211 and they are spaced apart 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. 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.

[0348] At least the connecting section 12 of the second heat exchange tube 1a is disposed within the U-shaped region 120 of the first heat exchange tube 1a. For the second heat exchange tube 1a, its connecting section 12 includes a third heat exchange section 123, a third heat exchange section 124, and a fifth heat exchange section 125. The third heat exchange section 123 and the fourth heat exchange section 124 are each bent to form a U-shaped region 120. The third heat exchange section 123 and the fourth heat exchange section 124 are bent and connected. The third heat exchange section 123 is disposed within the U-shaped region 120 of the fourth heat exchange section 124. At least a portion of the first heat exchange section 121 of the first heat exchange tube 1a is disposed within the U-shaped region 120 of the third heat exchange section 123. The three side edges corresponding to the U-shaped region 120 of the third heat exchange section 123 are parallel to the three side edges corresponding to the U-shaped region 120 of the fourth heat exchange section 124. The fifth heat exchange section 125 is connected to one end of the third heat exchange section 123 away from the fourth heat exchange section 124 and includes a sixth heat exchange 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 multiple sixth heat exchange parts 1251 are connected in sequence.

[0349] Example 3

[0350] 13 and 27 , the structure of this embodiment is substantially the same as that of the first embodiment, wherein the same components are designated by 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, and the first end portions 11a of all the heat exchange tubes 1 extend to one of the current collectors 2, and the second end portions 11b of all the heat exchange tubes 1 extend to the other current collector 2.

[0351] 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. There are multiple first heat exchange portions 1211 and they are spaced apart 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. 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.

[0352] 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, and each first heat exchange portion 1211 is arranged at intervals along the first direction. The second heat exchange part 1211 extends straightly along the second direction, and the first bending part 1212 is arc-shaped and bent 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. 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.

[0353] 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 unless they are contradictory. In order to avoid unnecessary repetition, the present application will no longer describe various possible combinations separately. In addition, the various different embodiments of the present application can also be combined in any manner, as long as they do not violate the ideas 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 unless they conflict.

[0354] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery, wherein: include: The 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 member, which is arranged in the box and located between the battery cell and the box. The first heat exchange member is used for heat exchange with the battery cell, and the first heat exchange member is spaced apart from the expansion beam to ensure thermal insulation between the first heat exchange member and the expansion beam.

2. The battery according to claim 1, wherein 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 arranged outside the box body, and the third heat exchange element is arranged between two adjacent battery cells.

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

4. The battery according to any one of claims 1 to 3, wherein 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. The wall 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, wherein 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 form the avoidance channel.

6. The battery according to claim 4 or 5, wherein Portions of the first heat exchange element 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, wherein The first heat exchange member 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 arranged to pass 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 current collector is connected to the 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, wherein The avoidance channel is configured to allow the corresponding current collector to pass through.

9. The battery according to any one of claims 4 to 8, wherein 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 recess; or The expansion beam is spaced apart from a portion of the wall of the box body except the second recess.

10. The battery according to claim 9, wherein The battery further comprises: 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, wherein The heat insulating member further includes a second heat insulating portion 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, wherein The expansion beam is further provided with a first fixing member, at least a portion of which is located inside the expansion beam. The battery further includes a second fixing member, which is arranged through the box body, the second heat insulation 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, wherein The expansion beam has a first recess, which is configured to form 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 further includes: A carrier is provided in the avoidance channel and has a second mating surface for abutting against the battery cell, the first mating surface is flush with the second mating surface, and the carrier has a groove for avoiding the first heat exchange component, the groove runs through the outer peripheral side of the carrier.

14. The battery according to claim 13, wherein 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 to limit the movement of the bearing member along the direction from the first cavity to the second cavity.

15. The battery according to claim 14, wherein The stopper is formed on the 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 element is disposed, and the stop step serves as a stop portion.

16. The battery according to claim 15, wherein In a cross section of the expansion beam, the stop portion on the expansion beam is formed into an arc-shaped structure, and the cross section of the expansion beam is perpendicular to a length direction of the expansion beam.

17. The battery according to any one of claims 13 to 16, wherein The carrier comprises: A plate body, wherein a surface on one side of the thickness of the plate body is formed as the second mating surface, and the slots penetrate through both sides of the thickness of the plate body; A matching portion is formed at an outer edge of the plate body and is abutted against the expansion beam to limit movement of the bearing member from the first cavity toward the second cavity.

18. The battery according to claim 17, wherein The matching portion has a first surface and a second surface, the first surface is formed as an arc-shaped surface concave 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, wherein At least one clamping hole is formed on the expansion beam, and the bearing member further includes: At least one hook portion is formed at the outer edge of the plate body and is located on a side of the plate body away from the second mating surface, and the hook portion is locked in the corresponding locking hole.

20. The battery according to any one of claims 17 to 19, wherein 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-butt fit with the box body.

21. The battery according to claim 20, wherein The width of the support portion in the thickness direction of the plate portion increases from the matching portion toward the first heat exchange element.

22. The battery according to any one of claims 13 to 21, wherein The bearing member is provided 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 supporting element and the first heat exchange element are spaced apart.

23. The battery according to any one of claims 13 to 22, wherein 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, wherein The first heat exchanger is arranged on the bottom wall of the box body, and the end of the second mating surface facing the first heat exchanger is arranged flush with the end of the battery cell facing the corresponding first heat exchanger, or the end of the second mating surface facing the first heat exchanger is arranged adjacent to the first heat exchanger compared to the end of the battery cell facing the corresponding first heat exchanger.

25. The battery according to any one of claims 1 to 24, wherein 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, wherein 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, wherein The first heat exchange section includes a first heat exchange portion and a first bending portion. There are multiple first heat exchange portions and they are arranged at intervals along the first direction. Each first heat exchange portion extends along the second direction. The first bending portion is arc-shaped and is bent and connected between two adjacent first heat exchange portions so that multiple first heat exchange portions 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, wherein 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, and 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. The fourth heat exchange part extends along the third side circumference of the first heat exchange section.

29. The battery according to claim 28, wherein 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 the fourth heat exchange part is located on the other side of the plurality of first heat exchange parts along the second direction. On one side, one end of the fourth heat exchange portion is connected to an end of the second heat exchange portion 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 section is located on one side of the multiple first heat exchange sections along the second direction, and the third heat exchange section is located on one side of the multiple first heat exchange sections 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 section is connected to one end of the second heat exchange section along the first direction, and the second end of the third heat exchange section is connected to the one of the multiple first heat exchange sections that is closest to the third heat exchange section along the first direction; the fourth heat exchange section is located on the other side of the multiple first heat exchange sections along the first direction, one end of the fourth heat exchange section is connected to one end of the second heat exchange section away from the third heat exchange section, and the other end of the fourth heat exchange section extends along the second direction toward a direction away from the second heat exchange section.

30. The battery according to claim 29, wherein 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.

31. The battery according to any one of claims 26 to 30, wherein 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, wherein 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. 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, wherein 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, wherein The second heat exchange tube includes a third heat exchange section and a fourth heat exchange section that are bent and connected. The third heat exchange section and the fourth heat exchange section are respectively bent to form the U-shaped area. The third heat exchange section is arranged in the U-shaped area of the fourth heat exchange section. At least part of the first heat exchange section of the first heat exchange tube is arranged in the U-shaped area of the third heat exchange section.

35. The battery according to claim 34, wherein The second heat exchange tube further includes a fifth heat exchange section, the fifth heat exchange section including a sixth heat exchange portion and a second bent portion. The sixth heat exchange portions are multiple and are arranged at intervals along the first direction. Each first heat exchange portion extends along the second direction. The second bent portion is arc-shaped and bends and connects between two adjacent sixth heat exchange portions, so that the multiple sixth heat exchange portions are connected in sequence. The second direction is arranged at an angle to the first direction. Wherein, the fifth heat exchange section is provided between the third heat exchange section and the fourth heat exchange section, and / or the fifth heat exchange section is provided between the third heat exchange section and the corresponding end portion.

36. The battery according to any one of claims 32 to 35, wherein The first heat exchange element further includes a third heat exchange tube, at least a portion of which 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, wherein The expansion beam comprises: a beam body defining a cavity; A reinforcing partition is arranged in the cavity and has a plurality of spaced 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 staggered.

38. The battery according to claim 37, wherein 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, wherein There are multiple expansion beams including a first expansion beam and a second expansion beam arranged at intervals. The battery cell is arranged between the first expansion beam and the second expansion beam. A third fixing member is provided in the cavity of the first expansion beam, and a fourth fixing member is provided in the cavity of the second expansion beam. The box assembly also includes a pull rope, which 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, wherein 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.

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

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