Battery and electrical device

Abstract

A battery (100) and an electrical device (1000). The battery (100) comprises a case assembly (20), a first heat exchange assembly (30), a battery cell assembly (101), and a first insulating member (71), wherein the case assembly (20) comprises a case (21); the first heat exchange assembly (30) comprises a first heat exchange member (31), the first heat exchange member (31) being fixed to a bottom wall (211) of the case (21); the battery cell assembly (101) is arranged in the case assembly (20), and the side of the battery cell assembly (101) that faces the bottom wall (211) of the case (21) is bonded to the bottom wall (211) of the case (21) and the first heat exchange member (31) by means of a first bonding layer (34); and the first insulating member (71) is at least partially arranged between the battery cell assembly (101) and the side of the first heat exchange member (31) that faces away from the bottom wall (211) of the case (21), the first bonding layer (34) covering the first insulating member (71). While achieving insulation between the battery cell assembly (101) and the first heat exchange member (31), the technical solution does not affect the continuous fitting arrangement between the first bonding layer (34) and the battery cell assembly (101), such that the reliability of the connection fit can be improved, enhancing the overall structural strength of the battery (100), and thus improving the reliability of the battery (100).

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202420286242.0 and application date of February 6, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

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

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0005] The reliability of batteries in related technologies needs to be further improved.

[0006] Summary of the Invention

[0007] In view of the above problems, the present application provides a battery and an electrical device that can reduce corrosion problems and have higher reliability.

[0008] In the first aspect, the present application provides a battery, which includes a case assembly, a first heat exchange assembly, a cell assembly and a first insulating member, the case assembly includes a case, the case having a bottom wall and a surrounding wall; the first heat exchange assembly is arranged in the case and includes a first heat exchange member, and the first heat exchange member is fixed to the bottom wall of the case; the cell assembly is arranged in the case assembly, and the side of the cell assembly facing the bottom wall of the case is bonded to the bottom wall of the case and the first heat exchange member through a first adhesive layer; the first insulating member is at least partially arranged between the side of the first heat exchange member facing away from the bottom wall of the case and the cell assembly, and the first adhesive layer covers the first insulating member.

[0009] In the technical solution of the embodiment of the present application, by bonding the battery cell assembly to the bottom wall of the box and the first heat exchanger, the battery cell assembly and the first heat exchanger can be fixed in the box, and the first heat exchanger is at least partially located between the bottom wall of the box and the bottom of the battery cell assembly, thereby reducing the heat transfer path, which is beneficial to improving the heat exchange efficiency and enhancing the performance of the battery. At least a portion of the first insulating member is arranged on the side of the first heat exchanger away from the bottom wall of the box, which can achieve insulation between the first heat exchanger and the battery cell assembly, reduce the corrosion problem caused by direct contact between the first heat exchanger and the battery cell assembly, and thus improve the reliability of the battery. In addition, because the first adhesive layer covers the first insulating member, while achieving insulation between the battery cell assembly and the first heat exchanger, it will not affect the continuous matching arrangement between the first adhesive layer and the battery cell assembly, which can improve the reliability of the connection and matching, improve the overall structural strength of the battery, and thus improve the reliability of the battery.

[0010] In some embodiments, the first heat exchange element comprises a heat exchange tube and a current collector, with the first insulating member at least partially disposed between the side of the heat exchange tube facing away from the bottom wall of the housing and the battery cell assembly; the current collector is connected to the heat exchange tube. In the above technical solution, the first heat exchange element is configured to include the heat exchange tube and the current collector. Compared to a double-layer brazed cold plate structure, the heat exchange tube can reduce material usage, thereby significantly reducing material costs, while the current collector acts as a confluence, thereby facilitating connection of the heat exchange tube to the battery's thermal management assembly.

[0011] In some embodiments, the first insulating member wraps around the outer circumference of the heat exchange tube. Wrapping the outer circumference of the heat exchange tube with the first insulating member can, on the one hand, provide insulation between the heat exchange tube and the battery cell assembly, and between the heat exchange tube and the bottom wall of the casing, thereby reducing corrosion caused by direct contact between the heat exchange tube, the battery cell assembly, and the bottom wall of the casing. Furthermore, the installation area and specific location of the first insulating member are no longer necessary, which can reduce the difficulty of installing the first insulating member and thus improve production efficiency.

[0012] In some embodiments, the heat exchange tube is a flat tube, with two walls disposed opposite each other in the thickness direction of the flat tube connected to the bottom wall of the battery cell assembly and the box assembly, respectively. In the above technical solution, configuring the heat exchange tube to include a flat tube reduces material costs. This increases the contact area between the heat exchange tube and the battery cell assembly, improving heat exchange efficiency and thus enhancing battery reliability. Furthermore, the flat tube occupies less space, which helps increase battery capacity while reducing weight, volume, and cost.

[0013] In some embodiments, the heat exchange tube includes a first tube segment and a second tube segment, one end of the first tube segment is bent and connected to one end of the second tube segment, and the other end of the second tube segment is connected to the current collector; wherein the first insulating member includes a first insulating portion and a second insulating portion, the first insulating portion is provided between the side of the first tube segment facing away from the bottom wall of the box and the battery cell assembly, and the second insulating portion is provided between the side of the second tube segment facing away from the bottom wall of the box and the battery cell assembly. In the above technical solution, the heat exchange tube is provided to include a first tube segment and a second tube segment connected in a bent manner, so that the heat exchange tube forms a bent structure, thereby increasing the contact area between the heat exchange tube and the battery cell assembly, improving the heat exchange efficiency of the heat exchange tube, making the temperature of the battery cell assembly more balanced, and thus improving the reliability of the battery. In addition, providing the first insulating portion on the first tube segment and the second insulating portion on the second tube segment can achieve insulation between the first tube segment and the battery cell assembly, and between the second tube segment and the battery cell assembly, reducing the corrosion problem caused by direct contact between the heat exchange tube and the battery cell assembly, thereby improving.

[0014] In some embodiments, the first insulating portion wraps around the outer circumferential wall of the first tube segment. Wrapping the first insulating portion around the outer circumferential wall of the first tube segment can, on the one hand, provide insulation between the first tube segment and the battery cell assembly, and between the first tube segment and the bottom wall of the box, thereby reducing corrosion caused by direct contact between the first tube segment, the battery cell assembly, and the bottom wall of the box. Furthermore, there is no need to consider the installation area and specific installation location of the first insulating portion, which can reduce the difficulty of installing the first insulating portion, thereby improving production efficiency.

[0015] In some embodiments, the second insulating portion wraps around the outer circumferential wall of the second tube segment. Wrapping the second insulating portion around the outer circumferential wall of the second tube segment can, on the one hand, provide insulation between the second tube segment and the battery cell assembly, and between the second tube segment and the bottom wall of the box, thereby reducing corrosion issues caused by direct contact between the second tube segment, the battery cell assembly, and the bottom wall of the box. Furthermore, there is no need to consider the installation area and specific installation location of the second insulating portion, which can reduce the difficulty of installing the second insulating portion, thereby improving production efficiency.

[0016] In some embodiments, the first pipe segment includes multiple first heat exchange sections, which are spaced apart and connected in a first direction and are bent in series. In the above technical solution, on the one hand, by providing multiple first heat exchange sections, the heat exchange area of ​​the first pipe segment can be increased, thereby increasing the heat exchange area of ​​the first pipe segment and improving the heat exchange effect of the first pipe segment. On the other hand, because the internal battery cells are wrapped by the external battery cells, the temperature difference between the internal battery cells is not large. Therefore, by providing multiple first heat exchange sections, the overall heat exchange effect can be improved while minimizing the temperature difference between the internal and external battery cells.

[0017] In some embodiments, the first pipe segment further includes a first bend portion, which is arc-shaped and bends and connects between two adjacent first heat exchange portions. In the above technical solution, by setting the first bend portion, the direction of fluid flow inside the first pipe segment can be changed, a smooth transition between the two first heat exchange portions can be achieved, and a circuitous arrangement of the first pipe segment can be achieved. As a result, the contact area between a single battery cell and the first pipe segment can be increased, thereby increasing the heat exchange area and improving the heat exchange efficiency of the first pipe segment. At the same time, the arc-shaped first bend portion can also 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 pipe segment. In addition, by setting the first bend portion, the structure of the first pipe segment is made more compact, the overall space occupied is smaller, and it is more conducive to realizing the miniaturization design of the battery and improving the volume energy density of the battery.

[0018] In some embodiments, the first heat exchange portion extends along the second direction, and the second pipe segment is disposed on the same side of the plurality of first pipe segments and extends along the first direction. In the above technical solution, disposing the second pipe segment on the same side of the plurality of first pipe segments allows, on the one hand, the second pipe segment to connect the current collector with the first pipe segment, thereby enabling circulation of the heat exchange fluid. On the other hand, it effectively utilizes the space between the current collector and the plurality of first pipe segments, thereby increasing the heat exchange area and improving heat exchange efficiency while also improving space utilization.

[0019] In some embodiments, the second tube segment is bent to form a U-shaped area, and the first tube segment is bent and arranged in the U-shaped area. In the above embodiment, by bending the second tube segment to form a U-shaped area, and the first tube segment is bent and arranged in the U-shaped area, when the first heat exchanger exchanges heat with the battery cell assembly, the U-shaped area formed by the outer second tube segment can be opposite to the outer battery cells of the battery, and the first tube segment in the U-shaped area can be opposite to the inner battery cells, so that the first heat exchanger 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 battery cells outside the battery cell assembly and the battery cells inside the battery cell assembly tend to be consistent, thereby improving the temperature uniformity of the battery, thereby improving the service life of the battery to a certain extent.

[0020] In some embodiments, the heat exchange tube further comprises a third tube segment, the first tube segment is connected between the third tube segment and the second tube segment, one end of the third tube segment is connected to the other end of the first tube segment, and the other end of the third tube segment is connected to the current collector; the first insulating member comprises a third insulating portion, the third insulating portion being at least partially disposed between the side of the third tube segment facing away from the bottom wall of the housing and the battery cell assembly. In the above technical solution, the heat exchange tube is configured to include the first tube segment, the second tube segment, and the third tube segment. On the one hand, the heat exchange tube can be connected to the thermal management assembly of the battery, and on the other hand, the heat exchange tube can be formed into a bent structure, thereby increasing the contact area between the heat exchange tube and the battery cell assembly, improving the heat exchange efficiency of the heat exchange tube, making the temperature of the battery cell assembly more balanced, and thus improving the reliability of the battery. In addition, the third insulating portion is provided on the third tube segment to achieve insulation between the third tube segment and the battery cell assembly, and between the third tube segment and the battery cell assembly, reducing the corrosion problem caused by direct contact between the heat exchange tube and the battery cell assembly, thereby improving.

[0021] In some embodiments, the third insulating portion wraps around the outer circumferential wall of the third tube segment. Wrapping the third insulating portion around the outer circumferential wall of the third tube segment can, on the one hand, provide insulation between the third tube segment and the cell assembly, and between the third tube segment and the bottom wall of the box, thereby reducing corrosion issues caused by direct contact between the third tube segment, the cell assembly, and the bottom wall of the box. Furthermore, the installation area and specific location of the third insulating portion are no longer necessary, which can reduce the difficulty of installing the third insulating portion and thereby improve production efficiency.

[0022] In some embodiments, the number of heat exchange tubes is one or more. When there are multiple heat exchange tubes, the multiple heat exchange tubes are arranged at intervals along the first direction, or arranged in a winding manner. In the above technical solution, arranging the multiple heat exchange tubes at intervals along the first direction, or arranging them in a winding manner, can improve the integrity of the multiple heat exchange tubes in the first heat exchange element, increase the diversity of the heat exchange tubes, and enable the first heat exchange element to better adapt to the needs of battery cell assemblies with different arrangements. The overall structural layout of the first heat exchange element can be more flexible and compact, thereby enabling the first heat exchange element to better meet the heat exchange area requirements of battery cells at different positions in the battery cell assembly.

[0023] In some embodiments, the bottom wall of the box has a receiving groove, the first heat exchange member is at least partially disposed in the receiving groove, and the first adhesive layer is at least partially filled in the receiving groove. In the above technical solution, the provision of the receiving groove can, on the one hand, position the heat exchange tube, reduce the risk of shaking of the heat exchange tube, and improve the installation stability and reliability of the heat exchange tube, thereby improving the reliability of the battery; on the other hand, it can increase the connection area between the heat exchange tube and the bottom wall of the box, thereby improving the reliability of the heat exchange tube fixed to the box. In addition, since the battery cell assembly can contact the bottom wall of the box and the heat exchange tube, the heat exchange efficiency can be improved, thereby further improving the reliability of the battery. In addition, the provision of the receiving groove on the bottom wall of the box makes the bottom wall of the box have a concave-convex structure, thereby improving the structural strength of the box, and the heat exchange tube is provided in the receiving groove, which is equivalent to a reinforcing structure of the box, which can further improve the structural strength of the box.

[0024] In some embodiments, the inner surface of the bottom wall of the case has an installation area for placing the battery cell assembly; the battery also includes: a second insulating member, at least partially arranged in the installation area excluding the accommodating groove, so that the second insulating member is arranged between the bottom wall of the case and the battery cell assembly, and the first adhesive layer is arranged in the installation area to cover the second insulating member. In the above technical solution, the second insulating member is arranged in the installation area excluding the accommodating groove, which can achieve insulation between the bottom wall of the case and the battery cell assembly, reduce the corrosion problem caused by direct contact between the bottom wall of the case and the battery cell assembly, and thus improve the reliability of the battery. In addition, because the first adhesive layer covers the second insulating member, on the basis of achieving insulation between the bottom wall of the case and the battery cell assembly, it will not affect the setting of the first adhesive layer, which can improve the connection reliability.

[0025] In some embodiments, a first expansion beam and a second expansion beam are disposed within the housing, the first and second expansion beams being arranged opposite each other, each of the first and second expansion beams defining a cavity therein; the mounting area is located between the first and second expansion beams, and the battery cell assembly is located between the first and second expansion beams. In the above technical solution, by providing the first and second expansion beams, when a battery cell in the battery cell assembly exhibits an expansion tendency, the first and second expansion beams abut against the battery cell assembly, utilizing the deformation of the cavities of the first and second expansion beams to absorb and transmit the expansion force, thereby reducing the probability of deformation of the battery cell due to the expansion force.

[0026] In some embodiments, the thickness of the first adhesive layer at the location excluding the accommodating groove is 0.5 mm to 2 mm. In the above technical solution, by limiting the thickness of the first adhesive layer at the location excluding the accommodating groove to meet the above conditions, the first adhesive layer can fully cover the first insulating member and the second insulating member, thereby improving the connection reliability between the first insulating member and the battery cell assembly, and between the second insulating member and the battery cell assembly, thereby improving the connection reliability between the bottom wall of the box and the battery cell assembly, and between the first heat exchange member and the battery cell assembly, and thus improving the reliability of the battery.

[0027] In some embodiments, a second adhesive layer is provided between the side of the first heat exchanger facing away from the battery cell assembly and the bottom wall of the box. In the above technical solution, by providing the second adhesive layer, the first heat exchanger can be pre-fixed in the box, thereby facilitating the installation of the remaining components.

[0028] In some embodiments, the box body is an integrally stamped part. In the above technical solution, since the bottom wall and the surrounding wall of the box body are integrally stamped and formed, there is no need to consider the sealing problem at the connection between the bottom wall and the surrounding wall, so the sealing effect can be improved, thereby preventing muddy water from seeping into the box body from the connection between the bottom wall and the surrounding wall and affecting the battery core components in the box body, thereby improving the reliability of the battery. In addition, the integrally stamped box body does not need to be spliced. On the one hand, it can save a large number of bolts on the original profile box body, reducing costs. On the other hand, it saves the connection steps and improves production efficiency. In addition, the integrally stamped box body can prevent the substances ejected when the battery has thermal runaway and the heat exchange fluid leaked from the first heat exchange component from flowing outside the box body, which can reduce the direct contact between the human body and the leaked substances, protect personal safety, and reduce environmental pollution.

[0029] In some embodiments, the battery cell assembly includes multiple battery cells, each of which includes multiple battery cells. The multiple battery cells in each battery cell are arranged along a first direction, and the multiple battery cells are arranged along a second direction, with the first and second directions arranged at an angle to each other. The first heat exchange assembly also includes a second heat exchange element, which is positioned between two adjacent battery cells. In the above technical solution, the provision of the second heat exchange element increases the contact area between the battery cells and the heat exchange assembly, thereby increasing the contact area between the battery cell assembly and the first heat exchange assembly, significantly improving heat exchange efficiency and enhancing battery reliability.

[0030] In some embodiments, the housing assembly further includes a housing cover, which is attached to the top of the housing and has a top wall. The first heat exchange assembly further includes a third heat exchange element, which is at least partially located between the top wall of the housing cover and the battery cell assembly. In this technical solution, the provision of the third heat exchange element increases the contact area between the battery cell assembly and the first heat exchange assembly, thereby significantly improving heat exchange efficiency and enhancing battery reliability.

[0031] In some embodiments, the battery further comprises: a second heat exchange assembly, which is fitted outside the box assembly. In the above technical solution, by placing the second heat exchange assembly outside the box, there is no need to consider issues such as insulation and corrosion protection between the heat exchange component and the battery cells inside the box, thereby simplifying the insulation and corrosion protection design of the second heat exchange assembly, reducing processing difficulty and production costs, solving the short circuit problem between the battery cells and the second heat exchange assembly, and improving battery reliability. Moreover, by placing the second heat exchange assembly outside the box assembly, the second heat exchange assembly does not occupy space inside the box, so that the battery capacity will not be reduced due to the installation of the heat exchange component, thereby significantly improving the battery capacity.

[0032] In a second aspect, the present application provides an electrical device comprising the battery in the above embodiment.

[0033] In the technical solution of the embodiment of the present application, by adopting the above-mentioned battery, the reliability of the electrical device can be improved, and the production efficiency of the electrical device can be improved and the cost can be reduced.

[0034] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0036] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0037] FIG2 is an exploded view of the structure of a battery provided in some embodiments of the present application;

[0038] FIG3 is a schematic diagram of a battery assembly according to some embodiments of the present application from a certain perspective;

[0039] FIG4 is an exploded view of the battery shown in FIG3 ;

[0040] FIG5 is a top view of the battery shown in FIG3 ;

[0041] FIG6 is a cross-sectional view of the structure of the battery shown in FIG3;

[0042] FIG7 is an enlarged view of portion A shown in FIG6 ;

[0043] FIG8 is an enlarged view of portion B shown in FIG7;

[0044] FIG9 is a schematic structural diagram of a first heat exchange element of a battery according to some embodiments of the present application;

[0045] FIG10 is a schematic structural diagram of a first heat exchange element of a battery according to some other embodiments of the present application;

[0046] FIG11 is a schematic structural diagram of a first heat exchange element of a battery according to some other embodiments of the present application;

[0047] FIG12 is a schematic structural diagram of a first heat exchange element of a battery in some further embodiments of the present application;

[0048] FIG13 is a schematic structural diagram of a current collector of a battery according to some embodiments of the present application;

[0049] FIG14 is a cross-sectional view of the structure of the current collector shown in FIG13;

[0050] FIG15 is a schematic structural diagram of the battery shown in FIG3 excluding the cell assembly;

[0051] FIG16 is an exploded view of the structure shown in FIG15 ;

[0052] FIG17 is a diagram of the assembly of batteries according to other embodiments of the present application;

[0053] FIG18 is a diagram of the assembly of batteries according to some other embodiments of the present application;

[0054] FIG19 is a schematic structural diagram of the battery cell and the second heat exchange element shown in FIG18 ;

[0055] FIG20 is a diagram of the assembly of batteries according to some further embodiments of the present application.

[0056] The reference numerals in the specific embodiment are as follows: electric device 1000, battery 100, battery cell assembly 101, battery unit 102, controller 200, motor 300, battery cell 10, box assembly 20, installation area 201, box 21, bottom wall 211, surrounding wall 212, accommodating groove 213, first groove section 2131, second groove section 2133, third groove section 2134, installation groove 214, box cover 22, First heat exchange assembly 30, first heat exchange element 31, first inlet and outlet 3108, second inlet and outlet 3109, heat exchange tube 314, first tube segment 3141, first heat exchange portion 3142, first bend 3143, second tube segment 3144, U-shaped area 3144a, second heat exchange portion 3145, second bend 3146, third heat exchange portion 3147, fourth heat exchange portion 3148, third tube segment 3149, current collector 315, tube body 3151, first space 3151a, second space 3151b, first flow channel interface 3152, second flow channel interface 3153, partition structure 3154, first partition plate 3154a, second partition plate 3154b, liquid inlet interface 3155, liquid discharge interface 3156, second heat exchange component 32, third heat exchange component 33, first adhesive layer 34, second adhesive layer 35, second heat exchange assembly 40, first fixed beam 51, second fixed beam 52, connecting beam 53, expansion beam 60, first expansion beam 61, second expansion beam 62, avoidance hole 6302, first insulating member 71, second insulating member 72, first mounting beam 81, second mounting beam 82, bottom guard plate 90. DETAILED DESCRIPTION

[0057] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0059] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0060] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present 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. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0061] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0062] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0063] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0064] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0065] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0066] In the battery of the related art, a liquid cooling plate is provided between the battery cell assembly and the bottom wall of the box body, an insulating thermal pad is provided between the liquid cooling plate and the battery cell assembly, and the insulating thermal pad and the battery cell assembly are connected together by thermally conductive glue.

[0067] Among them, the insulating thermal pad is provided with multiple deformation zones and multiple filling zones on the side facing the battery cell assembly. The multiple deformation zones and the multiple filling zones are arranged alternately. Penetration holes are provided on the filling zones, so that the thermal conductive glue in the filling zones enters the penetration holes, thereby fixing the liquid cooling plate, the insulating thermal conductive pad and the battery cell assembly together through the thermal conductive glue.

[0068] However, due to the discontinuous arrangement of multiple filling areas, the thermal conductive glue between the insulating thermal pad and the battery cell assembly will be discontinuous. Therefore, the distribution area of ​​the thermal conductive glue between the insulating thermal pad and the battery cell assembly is much smaller than the surface of the insulating thermal pad. This will lead to unreliable connection between the insulating thermal pad and the battery cell assembly, and the insulating thermal pad and the battery cell assembly are easily separated; and the insulating thermal pad and the liquid cooling plate are only connected through the thermal conductive glue at the penetration hole, the connection is unreliable, and the insulating thermal pad and the liquid cooling plate are easily separated.

[0069] To this end, an embodiment of the present application proposes a battery. By arranging the first insulating part at least on the side of the first heat exchange part facing away from the bottom wall of the box body, and making the first adhesive layer cover the first insulating part, double insulation between the first heat exchange part and the battery cell assembly can be achieved, thereby reducing the corrosion problem caused by direct contact between the first heat exchange part and the battery cell assembly. The first adhesive layer can also be arranged continuously, so that the first insulating part and the battery cell assembly can be fully connected, which is beneficial to improving the reliability of the battery.

[0070] The battery disclosed in the embodiments of the present application can be used in electrical devices that use the battery as a power source or various energy storage systems that use the battery as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0071] For the convenience of description, the following embodiments are described by taking an electric device 1000 according to an embodiment of the present application as a vehicle as an example.

[0072] Please refer to Figure 1, which is a schematic diagram of the structure of the vehicle provided in some embodiments of the present application. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle, and the battery 100 can be provided at the bottom, head or tail of the vehicle. The battery 100 can be used to power the vehicle. For example, the battery 100 can be used as an operating power source for the vehicle. The vehicle can also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle during driving.

[0073] In some embodiments of the present application, the battery 100 can serve not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0074] Please refer to FIG2 , which is an exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a box assembly 20 and a cell assembly 101 , wherein the cell assembly 101 is accommodated in the box assembly 20 .

[0075] The box assembly 20 is used to provide a storage space for the battery cells 10. The box assembly 20 can adopt a variety of structures. In some embodiments, the box assembly 20 can include a box body 21 and a box cover 22. The box body 21 and the box cover 22 cover each other, and the box body 21 and the box cover 22 together define a storage space for accommodating the battery cells 10. The box body 21 can be a hollow structure with one end open, and the box cover 22 can be a plate-like structure. The box cover 22 covers the open side of the box body 21, so that the box body 21 and the box cover 22 together define a storage space. The box body 21 and the box cover 22 can also be hollow structures with one side open, and the open side of the box cover 22 covers the open side of the box body 21. Of course, the box assembly 20 formed by the box body 21 and the box cover 22 can have a variety of shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0076] The battery cell assembly 101 may include multiple battery cells 10, which may 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 10. Multiple battery cells 10 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery 10 system may be housed within the housing assembly 20. Alternatively, the battery 100 may be constructed by first connecting multiple battery cells 10 in series, in parallel, or in a hybrid connection to form a battery 100 module. Multiple battery modules 100 may then be connected in series, in parallel, or in a hybrid connection to form an entire battery 100 system, and then housed within the housing assembly 20. The battery 100 may also include other structures. For example, the battery 100 may include a busbar assembly for electrically connecting the multiple battery cells 10.

[0077] Each battery cell 10 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 10 can be cylindrical, flat, rectangular, or in other shapes.

[0078] The battery cell 10 includes a housing cover, a housing body, an electrode assembly, and other functional components.

[0079] The shell cover refers to the component that covers the opening of the shell body to isolate the internal environment of the battery cell 10 from the external environment. The shape of the shell cover can be adapted to the shape of the shell body to match the shell body. Optionally, the shell cover can be made of a material with a certain hardness and strength (such as aluminum alloy). This makes the shell cover less likely to deform when subjected to compression or collision, giving the battery cell 10 greater structural strength and improved reliability. The shell cover can be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect to the electrode assembly to output or input electrical energy to the battery cell 10. In some embodiments, the shell cover can also be provided with a pressure relief mechanism for relieving internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold. The shell cover can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this is not particularly limited in the embodiments of the present application. In some embodiments, an insulating member can also be provided on the inside of the shell cover to isolate the electrical connection components within the shell body from the shell cover to reduce the risk of short circuits. For example, the insulating member may be made of plastic, rubber, or the like.

[0080] The shell body is a component used to cooperate with the shell cover to form the internal environment of the battery cell 10, wherein the formed internal environment can be used to accommodate the electrode assembly, electrolyte and other components. The shell body and the shell cover can be independent components, and an opening can be set on the shell body. The internal environment of the battery cell 10 is formed by covering the opening with the shell cover at the opening. Without limitation, the shell cover and the shell body can also be integrated. Specifically, the shell cover and the shell body can form a common connection surface before other components are inserted into the shell. When the interior of the shell body needs to be encapsulated, the shell cover is closed with the shell body. The shell body can be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the shell body can be determined according to the specific shape and size of the electrode assembly. The material of the shell body can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0081] The electrode assembly is the component in the battery cell 10 where the electrochemical reaction occurs. One or more electrode assemblies may be contained within the battery body. The electrode assembly is primarily formed by winding or stacking positive and negative electrode sheets, and a separator is typically provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active materials constitute the main body of the electrode assembly, while the portions of the positive and negative electrode sheets without active materials each constitute a tab. During the charge and discharge process of the battery 100, the positive and negative electrode active materials react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0082] According to some embodiments of the present application, referring to Figures 3 and 4, Figure 3 is a partial assembly diagram of a battery 100 in some embodiments of the present application from one perspective; Figure 4 is an exploded structural diagram of the battery 100 shown in Figure 3. The battery 100 includes a housing assembly 20, a first heat exchange assembly 30, and a cell assembly 101. The housing assembly 20 includes a housing 21 having a bottom wall 211 and a surrounding wall 212. The first heat exchange assembly 30 and the cell assembly 101 are both disposed within the housing 21, and the first heat exchange assembly 30 includes a first heat exchange member 31, which is fixed to the bottom wall 211 of the housing 21. The side of the cell assembly 101 facing the bottom wall 211 of the housing 21 is bonded to the bottom wall 211 of the housing 21 and the first heat exchange member 31 via a first adhesive layer 34.

[0083] That is, a first adhesive layer 34 is provided between the bottom wall 211 of the housing 21 and the bottom of the battery cell assembly 101, and between the first heat exchange element 31 and the bottom of the battery cell assembly 101, so that the first heat exchange element 31 can be at least partially disposed between the bottom of the housing 21 and the bottom of the battery cell assembly 101. By disposing the first heat exchange element 31 within the housing assembly 20, the first heat exchange element 31 can be in direct contact with the battery cell assembly 101, thereby improving the heat exchange efficiency of the first heat exchange element 30 and thus enhancing the reliability of the battery 100.

[0084] Further referring to Figures 5-8 , Figure 5 is a top view of the battery 100 shown in Figure 3 ; Figure 6 is a cross-sectional view of the structure of the battery 100 shown in Figure 3 ; Figure 7 is an enlarged view of section A shown in Figure 6 ; and Figure 8 is an enlarged view of section B shown in Figure 7 . The housing assembly 20 further includes a first insulating member 71 , which is at least partially disposed between the side of the first heat exchange member 31 facing away from the bottom wall 211 of the housing 21 and the battery cell assembly 101. The first adhesive layer 34 covers the first insulating member 71.

[0085] Specifically, the first insulating member 71 can separate the first heat exchange member 31 from the battery cell assembly 101, and the first adhesive layer 34 covers the first insulating member 71, connecting the first insulating member 71 to the battery cell assembly 101. The first insulating member 71 can be formed on the outside of the first heat exchange member 31 by spraying, electrophoresis, or dipping, or can be bonded to the outside of the first heat exchange member 31, or can be hot-pressed on the outside of the first heat exchange member 31.

[0086] In the technical solution of the embodiment of the present application, the battery cell assembly 101 and the first heat exchanger 31 can be bonded to the bottom wall 211 of the box body 21 and the first heat exchanger 31, so that the battery cell assembly 101 and the first heat exchanger 31 can be fixed in the box body 21, and the first heat exchanger 31 is at least partially located between the bottom wall 211 of the box body 21 and the bottom of the battery cell assembly 101, thereby reducing the heat transfer path, which is beneficial to improving the heat exchange efficiency and enhancing the performance of the battery 100. At least a portion of the first insulating member 71 is arranged on the side of the first heat exchanger 31 away from the bottom wall 211 of the box body 21, so as to achieve insulation between the first heat exchanger 31 and the battery cell assembly 101, reduce the corrosion problem caused by direct contact between the first heat exchanger 31 and the battery cell assembly 101, and thus improve the reliability of the battery 100.

[0087] In addition, since the first adhesive layer 34 covers the first insulating part 71, while achieving insulation between the battery cell assembly 101 and the first heat exchanger 31, it will not affect the continuous matching setting between the first adhesive layer 34 and the battery cell assembly 101, which can improve the reliability of the connection and the overall structural strength of the battery 100, thereby improving the reliability of the battery 100.

[0088] Please refer to Figures 4, 7 and 8 again. The first heat exchange member 31 includes a heat exchange tube 314 and a current collector 315. The first insulating member 71 is at least partially arranged between the side of the heat exchange tube 314 facing away from the bottom wall 211 of the box body 21 and the battery cell assembly 101. The current collector 315 is connected to the heat exchange tube 314.

[0089] In the above technical solution, the first heat exchange element 31 is configured to include a heat exchange tube 314 and a current collector 315. Compared with the double-layer brazed cold plate structure, the heat exchange tube 314 can reduce material usage, thereby significantly reducing material costs, and the current collector 315 can play a confluence role, thereby facilitating the connection of the heat exchange tube 314 to the thermal management component of the battery 100.

[0090] For example, as shown in Figure 8, the first insulating member 71 wraps around the outer circumferential wall of the heat exchange tube 314. By wrapping the first insulating member 71 around the outer circumferential wall of the heat exchange tube 314, insulation can be achieved between the heat exchange tube 314 and the battery cell assembly 101, and between the heat exchange tube 314 and the bottom wall 211 of the housing 21, thereby reducing corrosion caused by direct contact between the heat exchange tube 314, the battery cell assembly 101, and the bottom wall 211 of the housing 21. Furthermore, there is no need to consider the installation area and specific installation position of the first insulating member 71, which can reduce the difficulty of installing the first insulating member 71, thereby improving production efficiency.

[0091] Referring again to Figures 7 and 8 , the heat exchange tube 314 is a flat tube, with two opposing walls disposed along the thickness of the flat tube connected to the battery cell assembly 101 and the bottom wall 211 of the box assembly 20, respectively. The two walls along the thickness of the flat tube have smooth surfaces and a large contact area, increasing the heat transfer area and, in turn, the heat exchange efficiency of the first heat exchange element 31.

[0092] In the above technical solution, the heat exchange tube 314 is configured to include a flat tube. On the basis of reducing material costs, on the one hand, the contact area between the heat exchange tube 314 and the battery cell assembly 101 can be increased, and the heat exchange efficiency can be improved, thereby improving the reliability of the battery 100. On the other hand, the flat tube occupies a small space, which is conducive to increasing the capacity of the battery 100 and reducing the weight, volume and cost of the battery 100.

[0093] Please refer to Figures 9-12. Figure 9 is a schematic diagram of the structure of the first heat exchange member 31 of the battery 100 in some embodiments of the present application; Figure 10 is a schematic diagram of the structure of the first heat exchange member 31 of the battery 100 in other embodiments of the present application; Figure 11 is a schematic diagram of the structure of the first heat exchange member 31 of the battery 100 in still other embodiments of the present application; and Figure 12 is a schematic diagram of the structure of the first heat exchange member 31 of the battery 100 in still other embodiments of the present application. The heat exchange tube 314 includes a first tube segment 3141 and a second tube segment 3144. One end of the first tube segment 3141 is bent and connected to one end of the second tube segment 3144, and the other end of the second tube segment 3144 is connected to the current collector 315.

[0094] Among them, the first insulating part 71 includes a first insulating portion and a second insulating portion. The first insulating portion is arranged between the side of the first tube section 3141 facing away from the bottom wall 211 of the box body 21 and the battery cell assembly 101, and the second insulating portion is arranged between the side of the second tube section 3144 facing away from the bottom wall 211 of the box body 21 and the battery cell assembly 101.

[0095] In the above technical solution, the heat exchange tube 314 is set to include a first tube segment 3141 and a second tube segment 3144 connected in a bent manner, so that the heat exchange tube 314 can form a bent structure, thereby increasing the contact area between the heat exchange tube 314 and the battery cell assembly 101, improving the heat exchange efficiency of the heat exchange tube 314, making the temperature of the battery cell assembly 101 more balanced, and further improving the reliability of the battery 100.

[0096] In addition, a first insulating portion is provided on the first pipe segment 3141 and a second insulating portion is provided on the second pipe segment 3144, so that insulation between the first pipe segment 3141 and the battery cell assembly 101 and between the second pipe segment 3144 and the battery cell assembly 101 can be achieved, and corrosion problems caused by direct contact between the heat exchange tube 314 and the battery cell assembly 101 can be reduced, thereby improving.

[0097] For example, the first insulating portion wraps around the outer circumferential wall of the first tube segment 3141. By wrapping the first insulating portion around the outer circumferential wall of the first tube segment 3141, insulation can be achieved between the first tube segment 3141 and the battery cell assembly 101, and between the first tube segment 3141 and the bottom wall 211 of the housing 21, thereby reducing corrosion caused by direct contact between the first tube segment 3141, the battery cell assembly 101, and the bottom wall 211 of the housing 21. Furthermore, the installation area and specific location of the first insulating portion do not need to be considered, which reduces the difficulty of installing the first insulating portion and thereby improves production efficiency.

[0098] For example, the second insulating portion wraps around the outer circumferential wall of the second tube segment 3144. By wrapping the second insulating portion around the outer circumferential wall of the second tube segment 3144, insulation can be achieved between the second tube segment 3144 and the battery cell assembly 101, and between the second tube segment 3144 and the bottom wall 211 of the housing 21, thereby reducing corrosion caused by direct contact between the second tube segment 3144, the battery cell assembly 101, and the bottom wall 211 of the housing 21. Furthermore, there is no need to consider the installation area and specific installation position of the second insulating portion, which can reduce the difficulty of installing the second insulating portion, thereby improving production efficiency.

[0099] 9 to 12 , the first pipe section 3141 includes a plurality of first heat exchange portions 3142 . The plurality of first heat exchange portions 3142 are arranged at intervals along the first direction, and the plurality of first heat exchange portions 3142 are bent and connected in sequence.

[0100] That is, the plurality of first heat exchange sections 3142 are sequentially connected, and the connection between two connected first heat exchange sections 3142 is bent. For example, the two connected first heat exchange sections 3142 can be bent along a fold line or an arc. The number of first heat exchange sections 3142 can be two, three, four, five, or more.

[0101] It should be noted that the first heat exchange portion 3142 can have various shapes. For example, the first heat exchange portion 3142 can be linear or curved. The first heat exchange portion 3142 can also extend in various directions. For example, it can extend along the length or thickness of the battery cell 10. In this way, multiple first heat exchange portions 3142 can be bent and connected in sequence, so that the first tube segment 3141 can form an S-shape, an X-shape, a V-shape, and other shapes.

[0102] In the above technical solution, on the one hand, by setting up multiple first heat exchange parts 3142, the heat exchange area of ​​the first pipe segment 3141 can be increased, thereby increasing the heat exchange area of ​​the first pipe segment 3141, and then improving the heat exchange effect of the first pipe segment 3141; on the other hand, since the internal battery cells 10 are wrapped by the external battery cells 10, the temperature difference between the internal battery cells 10 is not large. Therefore, by setting up multiple first heat exchange parts 3142, the overall heat exchange effect can be improved while minimizing the temperature difference between the internal and external battery cells 10.

[0103] Specifically, as shown in Figure 12, for the battery cell assembly 101, the X direction in Figure 12 is the width direction of the battery cell assembly 101, and the Y direction is the length direction of the battery cell assembly 101. For the battery cell 10, the X direction in Figure 12 is the length direction of the battery cell 10, and the Y direction is the thickness direction of the battery cell 10. The battery cell assembly 101 includes a plurality of battery cells 102, and the plurality of battery cells 102 are arranged along the second direction, that is, the plurality of battery cells 102 are stacked in the thickness direction of the battery cell 10. Each battery cell 102 includes a plurality of battery cells 10, and the plurality of battery cells 10 of each battery cell 102 are arranged along the first direction, that is, the plurality of battery cells 10 of each battery cell 102 are stacked in the length direction of the battery cell 10.

[0104] The multiple first heat exchange sections 3142 can be arranged along a first direction and extend along a second direction. The multiple first heat exchange sections 3142 are connected end to end, thereby forming a bent structure in the first tube section 3141. In other words, the arrangement direction of the first heat exchange sections 3142 is arranged at an angle to the arrangement direction of the multiple battery cells 102, and the arrangement direction of the first heat exchange sections 3142 is consistent with the arrangement direction of the multiple battery cells 10 in each battery cell 102.

[0105] In the above technical solution, by limiting the arrangement direction of multiple first heat exchange parts 3142, a part of the battery cells 10 of the battery 100 can be in contact with multiple first heat exchange parts 3142, or each first heat exchange part 3142 can be in contact with a part of the battery cells 10, so that the heat exchange of multiple battery cells 10 can be more uniform, which is beneficial to improving the reliability of the battery 100.

[0106] 9 to 12 , a plurality of first heat exchange portions 3142 are arranged at intervals along the first direction, and each first heat exchange portion 3142 extends linearly along the second direction, with the first direction and the second direction forming an angle.

[0107] The phrase "the first direction and the second direction are arranged at an angle" is intended to explain that the first and second directions can be arranged perpendicularly or intersecting non-perpendicularly. For example, the first and second directions can be arranged at an angle of 30°, 60°, 80°, 120°, 150°, or 170°. For example, as shown in Figure 12 , the first direction is the length of the battery cell 10, and the second direction is the thickness of the battery cell 10. The first heat exchange portions 3142 extend along the length of the battery cell 10 and are spaced apart along the thickness of the battery cell 10. In this way, multiple first heat exchange portions 3142 can be bent and connected to form an S-shape, thereby achieving heat exchange for multiple battery cells 10.

[0108] In the above embodiment, by setting the first heat exchange part 3142 to extend straightly along the second direction, the production difficulty of the first heat exchange part 3142 can be reduced, and the production complexity of the first pipe segment 3141 can be reduced. At the same time, the straight pipe can also increase the flow rate of the heat exchange fluid, thereby improving the heat exchange effect of the first pipe segment 3141.

[0109] Please refer to Figures 9 to 12 again. The first pipe section 3141 further includes a first bending portion 3143. The first bending portion 3143 is arc-shaped and is bent and connected between two adjacent first heat exchange portions 3142.

[0110] The first bend 3143 is arc-shaped, that is, it extends along an arc, and the flow direction of the heat exchange fluid at both ends of the first bend 3143 forms a certain angle. As a result, the first bend 3143 can change the flow direction of the heat exchange fluid, thereby allowing the two connected first heat exchange sections 3142 to extend within a predetermined area, thereby increasing the heat exchange area of ​​the first pipe section 3141 and improving the heat exchange efficiency of the first pipe section 3141. Furthermore, the first bend 3143 is arc-shaped, and the arc-shaped bend structure can reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the fluid and further improving the heat exchange efficiency of the first pipe section 3141.

[0111] Furthermore, the number of the first bends 3143 can be one, two, three or more. The first bends 3143 can make the first pipe section 3141 arranged in a circuitous manner, thereby increasing the heat exchange area of ​​the first pipe section 3141 and improving the heat exchange efficiency of the first pipe section 3141.

[0112] In the above technical solution, by setting the first bending portion 3143, the fluid flow direction inside the first pipe section 3141 can be changed, and a smooth transition between the two first heat exchange portions 3142 can be achieved, thereby realizing a circuitous arrangement of the first pipe section 3141. This can increase the contact area between a single battery cell 10 and the first pipe section 3141, thereby increasing the heat exchange area and improving the heat exchange efficiency of the first pipe section 3141.

[0113] At the same time, the arcuate shape of the first bend 3143 can also reduce the flow resistance of the fluid and reduce the pressure drop, thereby increasing the flow rate of the fluid and further improving the heat exchange efficiency of the first tube segment 3141. Furthermore, the provision of the first bend 3143 makes the structure of the first tube segment 3141 more compact, occupying a smaller overall space, which is more conducive to the miniaturization of the battery 100 and improves the volumetric energy density of the battery 100.

[0114] In some specific examples of the present application, referring to FIG. 9 to FIG. 12 , the first bending portion 3143 may be in a semicircular arc shape.

[0115] That is to say, the first bend portion 3143 can extend along a semicircular arc line. Specifically, the first bend portion 3143 can extend along a semicircular arc line that is raised in the direction away from the two first heat exchange portions 3142 connected by the first bend portion 3143. The angle between the inlet and outlet of the first bend portion 3143 is 180°, and the flow directions at the outlet and inlet positions of the first bend portion 3143 are opposite, so that the two adjacent first heat exchange portions 3142 are closer together, and the structure of the entire first pipe section 3141 is more compact and reliable. Among them, the first bend portion 3143 is used to connect two first heat exchange portions 3142 that are parallel to each other and arranged at intervals. In other embodiments, the bending degree of the first bend portion 3143 can also be adjusted according to demand, for example, it can be 150°, 135°, etc., and the embodiments of the present application are not limited thereto.

[0116] The two first heat exchange parts 3142 are formed into a "U"-shaped pipe through the first bending part 3143. The first pipe section 3141 can include one or more "U"-shaped pipes. Multiple "U"-shaped pipes are connected in sequence, and the connected "U"-shaped pipes are connected through the first bending part 3143.

[0117] In the above technical solution, by setting the first bending portion 3143 to be semicircular, the design diversity of the heat exchange tube 314 can be increased, thereby improving the adaptability of the heat exchange tube 314; at the same time, the semicircular structure is relatively simple, thereby reducing the production difficulty of the heat exchange tube 314 and improving the production speed of the heat exchange tube 314.

[0118] Please refer to FIG. 9 again. The first heat exchange portion 3142 extends along the second direction. The second pipe segment 3144 is disposed on the same side of the plurality of first pipe segments 3141 and extends along the first direction.

[0119] Specifically, the second pipe segment 3144 can extend along the first direction, one end of the second pipe segment 3144 is connected to one end of the first pipe segment 3141, and the other end of the second pipe segment 3144 is connected to the collector 315. The second pipe segment 3144 is connected between the collector 315 and the first pipe segment 3141, so that the heat exchange tube 314 can be connected to the thermal management component of the battery 100.

[0120] In the above technical solution, the second pipe segment 3144 is arranged on the same side of the multiple first pipe segments 3141. On the one hand, the second pipe segment 3144 can be used to connect the collector 315 and the first pipe segment 3141, thereby realizing the circulation flow of the heat exchange fluid. On the other hand, the space between the collector 315 and the multiple first pipe segments 3141 is effectively utilized, which can increase the heat exchange area, improve the heat exchange efficiency, and improve the space utilization.

[0121] 10 to 12 , the second tube segment 3144 is bent to form a U-shaped region 3144 a , and the first tube segment 3141 is bent and disposed within the U-shaped region 3144 a , so that the second tube segment 3144 extends along the outer periphery of the first tube segment 3141 .

[0122] Among them, the above-mentioned "the second tube segment 3144 is bent to form a U-shaped area 3144a, and the first tube segment 3141 is bent and arranged in the U-shaped area 3144a" is intended to explain that the second tube segment 3144 is arranged on the circumferential periphery of the first tube segment 3141, and can be arranged on the three circumferential sides of the first tube segment 3141. The second tube segment 3144 can be arranged closer to the peripheral position of the battery 100 relative to the first tube segment 3141.

[0123] The second tube segment 3144 is bent to form a U-shaped area 3144a, that is, in the direction from one end of the second tube segment 3144 toward the other end, the second tube segment 3144 extends along the U-shaped line to form the U-shaped area 3144a.

[0124] The first tube segment 3141 is bent and disposed in the U-shaped area 3144a, that is, the first tube segment 3141 is arranged in the space enclosed by the second tube segment 3144, and the first tube segment 3141 extends along a non-straight line on the inner side of the second tube segment 3144, having at least one bending position.

[0125] It should be noted that in this embodiment, only the first tube segment 3141 is defined as being bent within the U-shaped region 3144a, and the bending form of the first tube segment 3141 is not defined. That is, the specific bending form of the first tube segment 3141 can be designed based on the heat exchange requirements of the battery 100. For example, the first tube segment 3141 may extend along the length direction of the battery cell 10 (i.e., the X direction in FIG. 12 ), and after extending to a certain length, bend toward the width direction of the battery cell 10 (i.e., the Y direction in FIG. 12 ), and then continue to extend along the length direction of the battery cell 10 and bend along the width direction. Alternatively, the first tube segment 3141 may extend along the width direction of the battery cell 10, and after extending to a certain length, bend toward the length direction of the battery cell 10, and then continue to extend along the width direction of the battery cell 10 and bend along the length direction.

[0126] The first pipe segment 3141 and the second pipe segment 3144 are connected in a bent manner, that is, one end of the first pipe segment 3141 is connected to one end of the second pipe segment 3144, and the connection position between the first pipe segment 3141 and the second pipe segment 3144 is a bent non-linear structure. For example, the connection position between the first pipe segment 3141 and the second pipe segment 3144 can be bent into an arc segment.

[0127] Among them, the first pipe section 3141 and the second pipe section 3144 are connected, so that one of the end of the first pipe section 3141 away from the second pipe section 3144 and the end of the second pipe section 3144 away from the first pipe section 3141 can be used as the liquid inlet end and the other can be used as the liquid outlet end. Therefore, when the first pipe section 3141 performs heat exchange, the heat exchange medium can flow from the first pipe section 3141 to the second pipe section 3144, or from the second pipe section 3144 to the first pipe section 3141.

[0128] It is understandable that as the heat exchange fluid flows through the first pipe section 3141, the temperature of the heat exchange fluid gradually changes, resulting in a gradual decrease in the heat exchange effect. For example, when the first heat exchange element 31 cools the battery cell assembly 101, the heat from the battery cell 10 is gradually transferred to the heat exchange fluid, causing the temperature of the heat exchange fluid to gradually increase as it flows along the first pipe section 3141, the temperature difference between the heat exchange fluid and the battery cell 10 gradually decreases, and the heat exchange efficiency gradually decreases. When the first heat exchange element 31 heats the battery cell assembly 101, the heat in the heat exchange fluid is gradually transferred to the battery cell 10, causing the temperature of the heat exchange fluid to gradually decrease as it flows along the first pipe section 3141, the temperature difference between the heat exchange fluid and the battery cell 10 gradually decreases, and the heat exchange efficiency gradually decreases.

[0129] When the first heat exchange component 31 is dissipating heat and cooling the battery cell assembly 101, the heat exchange fluid can also flow from the first pipe segment 3141 to the second pipe segment 3144, but the heat exchange fluid can also flow from the second pipe segment 3144 to the first pipe segment 3141. When the heat exchange fluid also flows from the first pipe segment 3141 to the second pipe segment 3144, the battery cells 10 in the middle of the battery 100 (that is, the internal battery cells 10 on the inner side of the periphery) can be cooled first, and then the battery cells 10 at the peripheral edge of the battery 100 can be cooled. Since the heat dissipation of the battery cells 10 at the peripheral edge of the battery 100 is better than that of the internal battery cells 10, the heat exchange fluid with a lower temperature in the first pipe segment 3141 can better meet the heat dissipation requirements of the battery cells 10 in the middle of the battery 100, and at the same time Since the battery cells 10 at the peripheral position can dissipate heat naturally directly to the external environment, when the temperature of the heat exchange fluid in the second pipe section 3144 is slightly higher, it can still meet the heat dissipation needs of the peripheral battery cells 10, so that the cooling effects obtained by the battery cells 10 at the peripheral position of the battery 100 and the battery cells 10 at the middle position of the battery 100 are roughly the same, and the temperatures of the battery cells 10 at the peripheral position of the battery 100 and the battery cells 10 at the middle position of the battery 100 after cooling and heat dissipation are relatively consistent, making the temperature distribution inside the battery 100 more uniform.

[0130] When the first heat exchange element 31 heats the battery cell assembly 101, the heat exchange fluid can also flow from the first pipe segment 3141 to the second pipe segment 3144, but the heat exchange fluid can also flow from the second pipe segment 3144 to the first pipe segment 3141. For example, when the heat exchange fluid flows from the second pipe segment 3144 to the first pipe segment 3141, the battery cells 10 at the periphery of the battery cell assembly 101 can be heated first, and then the heat exchange fluid can cool the battery cells 10 at the middle of the battery cell assembly 101. Since the battery cells 10 at the periphery of the battery 100 dissipate more heat to the external environment, the temperature of the battery cells 10 at the periphery of the battery 100 is more likely to drop. The heat exchange fluid first heats the battery cells 10 at the periphery of the battery 100. The higher temperature heat exchange fluid can increase the temperature of the battery cells 10 at the periphery while compensating for the heat lost by the battery cells 10 due to heat dissipation to the external environment. To meet its heating needs, the battery cell 10 in the middle of the battery cell assembly 101 has a small contact area with the external environment and a small heat loss. The lower temperature heat exchange fluid flowing in the first pipe section 3141 can cooperate with the heat generated by the battery cell 10 itself to well meet its heating needs. As a result, the heating effects obtained by the battery cells 10 on the periphery of the battery 100 and the battery cells 10 in the middle of the battery cell assembly 101 can be basically the same, thereby making the temperatures of the battery cells 10 on the periphery of the battery 100 and the battery cells 10 in the middle of the battery cell assembly 101 more consistent after heating, so that the temperature distribution in the battery 100 is more uniform.

[0131] In the above embodiment, the second tube segment 3144 is bent to form a U-shaped area 3144a, and the first tube segment 3141 is bent and arranged in the U-shaped area 3144a. When the first heat exchanger 31 exchanges heat with the battery cell assembly 101, the U-shaped area 3144a formed by the outer second tube segment 3144 can be opposite to the outer battery cell 10 of the battery 100, and the first tube segment 3141 in the U-shaped area 3144a can be opposite to the internal battery cell 10, so that the first heat exchanger 31 can compensate for the internal and external temperature difference caused by the heat exchange between the outer battery cell 10 and the environment, so that the heat exchange effect of the battery cell 10 outside the battery cell assembly 101 and the battery cell 10 inside the battery cell assembly 101 tend to be consistent, thereby improving the temperature uniformity of the battery 100, thereby improving the service life of the battery 100 to a certain extent.

[0132] 9 to 12 , the heat exchange tube 314 further includes a third tube segment 3149 . The first tube segment 3141 is connected between the third tube segment 3149 and the second tube segment 3144 . One end of the third tube segment 3149 is connected to the other end of the first tube segment 3141 , and the other end of the third tube segment 3149 is connected to the current collector 315 .

[0133] The first insulating member 71 includes a third insulating portion. The third insulating portion is at least partially disposed between the battery cell assembly 101 and a side of the third tube section 3149 facing away from the bottom wall 211 of the box body 21 .

[0134] In the above technical solution, the heat exchange tube 314 is configured to include a first tube segment 3141, a second tube segment 3144 and a third tube segment 3149. On the one hand, the heat exchange tube 314 can be connected to the thermal management component of the battery 100. On the other hand, the heat exchange tube 314 can be formed into a bent structure, thereby increasing the contact area between the heat exchange tube 314 and the battery cell assembly 101, improving the heat exchange efficiency of the heat exchange tube 314, making the temperature of the battery cell assembly 101 more balanced, and thus improving the reliability of the battery 100.

[0135] In addition, a third insulating portion is provided on the third pipe segment 3149, which can achieve insulation between the third pipe segment 3149 and the battery cell assembly 101, and between the third pipe segment 3149 and the battery cell assembly 101, thereby reducing the corrosion problem caused by direct contact between the heat exchange tube 314 and the battery cell assembly 101, thereby improving.

[0136] For example, the third insulating portion wraps around the outer circumferential wall of the third tube segment 3149. By wrapping the third insulating portion around the outer circumferential wall of the third tube segment 3149, insulation can be achieved between the third tube segment 3149 and the battery cell assembly 101, and between the third tube segment 3149 and the bottom wall 211 of the housing 21, thereby reducing corrosion caused by direct contact between the third tube segment 3149, the battery cell assembly 101, and the bottom wall 211 of the housing 21. Furthermore, there is no need to consider the installation area and specific installation location of the third insulating portion, which can reduce the difficulty of installing the third insulating portion, thereby improving production efficiency.

[0137] According to some embodiments of the present application, the heat exchange tube 314 may be formed by bending a single tube.

[0138] The term "single tube bending" refers to the heat exchange tube 314 being formed by bending a single straight tube multiple times through a process such as pressing and rolling. For example, a single straight tube can be bent at multiple predetermined locations to form a V-shape, a U-shape, or the like. The bending shape of the single tube can be designed based on actual conditions.

[0139] In the above embodiment, by setting the heat exchange tube 314 to be formed by bending a single tube, the number of welding points of the first heat exchange component 31 can be reduced, thereby reducing the risk of leakage of the first heat exchange component 31 and improving the reliability of the first heat exchange component 31; at the same time, the operation process of bending a single tube is simpler than the manufacturing process of the plate structure, thereby significantly reducing the cost of the first heat exchange component 31.

[0140] According to some embodiments of the present application, the heat exchange tube 314 is bent in an arc shape at the bending position.

[0141] Among them, the arc-shaped bend can reduce the flow resistance of the fluid and reduce the pressure drop. Furthermore, the arc-shaped bend of the heat exchange tube 314 at the bending position can increase the flow rate of the heat exchange fluid in the heat exchange channel, thereby increasing the heat exchange efficiency of the first heat exchange element 31.

[0142] In the above embodiment, by setting the heat exchange tube 314 to be bent in an arc shape at the bending position, the flow resistance of the fluid can be reduced, the pressure drop can be reduced, and the flow rate of the heat exchange fluid in the heat exchange channel can be increased, thereby increasing the heat exchange efficiency of the first heat exchange element 31.

[0143] Please refer to FIG. 9 again, the number of the heat exchange tube 314 is one.

[0144] In this embodiment, the number of heat exchange tubes 314 is one, and the heat exchange tube 314 includes a first tube segment 3141, a second tube segment 3144 and a third tube segment 3149. The first tube segment 3141 includes a plurality of first heat exchange parts 3142 and a plurality of first bending parts 3143. The plurality of first heat exchange parts 3142 are arranged along the first direction, and each first heat exchange part 3142 extends along the second direction. The plurality of first heat exchange parts 3142 are connected end to end in sequence through the plurality of first bending parts 3143. The second tube segment 3144 and the third tube segment 3149 are arranged on the same side of the plurality of first tube segments 3141. The second tube segment 3144 and the third tube segment 3149 both extend along the first direction. One end of the second tube segment 3144 is bent and connected to one end of the first tube segment 3141, and the other end is connected to the collector 315. One end of the third tube segment 3149 is bent and connected to the other end of the first tube segment 3141, and the other end is connected to the collector 315.

[0145] Please refer to FIG. 10 and FIG. 11 again. There are multiple heat exchange tubes 314 , and the multiple heat exchange tubes 314 are arranged around each other.

[0146] As shown in Figure 10, in this embodiment, the first heat exchange element 31 includes three heat exchange tubes 314, each heat exchange tube 314 has a first inlet and outlet 3108 at one end and a second inlet and outlet 3109 at the other end, the first inlet and outlet 3108 of the three heat exchange tubes 314 are connected to one of the collectors 315, and the second inlet and outlet 3109 of the three heat exchange tubes 314 are connected to the other collector 315.

[0147] Each heat exchange tube 314 includes a first tube segment 3141, a second tube segment 3144 and a third tube segment 3149. The two ends of the first tube segment 3141 are respectively connected to one end of the second tube segment 3144 and one end of the third tube segment 3149. The other end of the second tube segment 3144 is connected to one of the collectors 315, and the other end of the third tube segment 3149 is connected to another of the collectors 315.

[0148] The first pipe section 3141 of each heat exchange tube 314 includes multiple first heat exchange parts 3142 and multiple first bending parts 3143. The multiple first heat exchange parts 3142 are arranged along the first direction, and the length direction of each first heat exchange part 3142 extends along the second direction. The multiple first heat exchange parts 3142 are connected by bending in sequence end to end through the multiple first bending parts 3143, so that the first pipe section 3141 forms a multi-bending structure.

[0149] The second pipe section 3144 of one heat exchange tube 314 forms a U-shaped structure, so that it can be arranged on the first pipe section 3141 of the heat exchange tube 314 and the outer periphery of the other two heat exchange tubes 314. The second pipe section 3144 of the heat exchange tube 314 includes a second heat exchange portion 3145, a third heat exchange portion 3147 and a fourth heat exchange portion 3148. The second heat exchange portion 3145 and the fourth heat exchange portion 3148 are arranged on opposite sides of the first pipe section 3141, and the length direction of the second heat exchange portion 3145 and the fourth heat exchange portion 3148 are along The third heat exchange part 3147 extends in the second direction, and the length direction of the third heat exchange part 3147 extends along the first direction. One end of the third heat exchange part 3147 and one end of the second heat exchange part 3145 are connected by a bending portion 3146. The other end of the third heat exchange part 3147 and one end of the fourth heat exchange part 3148 are connected by a bending portion 3146. The other end of the second heat exchange part 3145 is connected to the first pipe section 3141 through the second bending portion 3146. The other end of the fourth heat exchange part 3148 is connected to one of the collectors 315.

[0150] The second pipe sections 3144 of the other two heat exchange pipes 314 also form a U-shaped structure, so that they can be arranged on the outer periphery of the first pipe sections 3141 of the corresponding heat exchange pipes 314 .

[0151] In the above technical solution, by arranging the second heat exchange part 3145, the third heat exchange part 3147 and the fourth heat exchange part 3148 on three sides of the first pipe segment 3141 respectively, the second pipe segment 3144 can surround the first pipe segment 3141, thereby increasing the compactness of the arrangement of the first pipe segment 3141 and realizing the miniaturization of the structure of the first pipe segment 3141, which is beneficial to ensuring the volume energy density of the battery 100. At the same time, the structure of the first pipe segment 3141 can be simplified, which facilitates the processing and production of the first heat exchange component 31.

[0152] As shown in Figure 11, in this embodiment, the number of heat exchange tubes 314 is two, and each heat exchange tube 314 has a first inlet and outlet 3108 at one end and a second inlet and outlet 3109 at the other end. The first inlet and outlet 3108 of the two heat exchange tubes 314 are connected to one of the collectors 315, and the second inlet and outlet 3109 of the two heat exchange tubes 314 are connected to the other collector 315.

[0153] Each heat exchange tube 314 includes a first tube segment 3141, a second tube segment 3144 and a third tube segment 3149. The two ends of the first tube segment 3141 are respectively connected to one end of the second tube segment 3144 and one end of the third tube segment 3149. The other end of the second tube segment 3144 is connected to one of the collectors 315, and the other end of the third tube segment 3149 is connected to another of the collectors 315.

[0154] The first pipe section 3141 of each heat exchange tube 314 includes multiple first heat exchange parts 3142 and multiple first bending parts 3143. The multiple first heat exchange parts 3142 are arranged along the first direction, and the length direction of each first heat exchange part 3142 extends along the second direction. The multiple first heat exchange parts 3142 are bent and connected in sequence through the multiple first bending parts 3143, so that the first pipe section 3141 forms a multi-bending structure.

[0155] The second pipe section 3144 of one heat exchange tube 314 forms a U-shaped structure, so that it can be arranged on the first pipe section 3141 of the heat exchange tube 314 and the outer periphery of the remaining heat exchange tube 314. The second pipe section 3144 of the heat exchange tube 314 includes a second heat exchange portion 3145, a third heat exchange portion 3147 and a fourth heat exchange portion 3148. The second heat exchange portion 3145 and the fourth heat exchange portion 3148 are arranged on opposite sides of the first pipe section 3141, and the length direction of the second heat exchange portion 3145 and the fourth heat exchange portion 3148 are along The third heat exchange part 3147 extends in the second direction, and the length direction of the third heat exchange part 3147 extends along the first direction. One end of the third heat exchange part 3147 and one end of the second heat exchange part 3145 are connected by a bending portion 3146. The other end of the third heat exchange part 3147 and one end of the fourth heat exchange part 3148 are connected by a bending portion 3146. The other end of the second heat exchange part 3145 is connected to the first pipe section 3141 through the second bending portion 3146. The other end of the fourth heat exchange part 3148 is connected to one of the collectors 315.

[0156] The second pipe section 3144 of another heat exchange pipe 314 also forms a U-shaped structure, so that it can be arranged on the outer periphery of the first pipe section 3141 of the heat exchange pipe 314 .

[0157] In the above technical solution, by arranging the second heat exchange part 3145, the third heat exchange part 3147 and the fourth heat exchange part 3148 on three sides of the first pipe segment 3141 respectively, the second pipe segment 3144 can surround the first pipe segment 3141, thereby increasing the compactness of the arrangement of the first pipe segment 3141 and realizing the miniaturization of the structure of the first pipe segment 3141, which is beneficial to ensuring the volume energy density of the battery 100. At the same time, the structure of the first pipe segment 3141 can be simplified, which facilitates the processing and production of the first heat exchange component 31.

[0158] Referring again to FIG. 12 , there are multiple heat exchange tubes 314 , which are spaced apart and arranged along the first direction. The multiple heat exchange tubes 314 can be arranged in parallel, allowing the heat exchange fluid to simultaneously transfer heat to different battery cells 102 along the multiple heat exchange tubes 314 , thereby improving the heat exchange efficiency of the battery cell assembly 101 and, to a certain extent, achieving a better heat exchange effect for the battery cell assembly 101 .

[0159] As shown in Figure 12, in this embodiment, there are two heat exchange tubes 314, and the two heat exchange tubes 314 are symmetrically arranged about the center line of the box body 21 extending along the second direction. One end of each heat exchange tube 314 has a first inlet and outlet 3108 and the other end has a second inlet and outlet 3109. The first inlet and outlet 3108 and the second inlet and outlet 3109 of the two heat exchange tubes 314 are both connected to the same collector 315.

[0160] Each heat exchange tube 314 includes a first tube segment 3141, a second tube segment 3144 and a third tube segment 3149. The first tube segment 3141 of each heat exchange tube 314 includes multiple first heat exchange parts 3142 and multiple first bending parts 3143. The multiple first heat exchange parts 3142 are arranged along the first direction, and the length direction of each first heat exchange part 3142 extends along the second direction. The multiple first heat exchange parts 3142 are bent and connected in sequence through multiple first bending parts 3143, so that the first tube segment 3141 forms a multi-bending structure.

[0161] The second pipe section 3144 of each heat exchange tube 314 is arranged on the outer periphery of the first pipe section 3141 and includes a second heat exchange part 3145, a third heat exchange part 3147 and a fourth heat exchange part 3148. The second heat exchange part 3145 and the fourth heat exchange part 3148 are arranged on opposite sides of the first pipe section 3141, and the length direction of the third heat exchange part 3147 extends along the second direction. The length directions of the second heat exchange part 3145 and the fourth heat exchange part 3148 both extend along the first direction. One end of the third heat exchange part 3147 and one end of the second heat exchange part 3145 are connected by a bending portion 3146, and the other end of the third heat exchange part 3147 and one end of the fourth heat exchange part 3148 are connected by a bending portion 3146. The other end of the second heat exchange part 3145 is connected to the first pipe section 3141 through the second bending portion 3146, and the other end of the fourth heat exchange part 3148 is connected to one of the collectors 315.

[0162] In the above technical solution, multiple heat exchange tubes 314 are arranged at intervals along the first direction or arranged around each other, so that the multiple heat exchange tubes 314 in the first heat exchange element 31 can have better integrity, increase the diversity of the heat exchange tubes 314, and enable the first heat exchange element 31 to better adapt to the needs of battery cell assemblies 101 with different arrangements. The overall structural layout of the first heat exchange element 31 can be more flexible and compact, so that the first heat exchange element 31 can better meet the heat exchange area requirements of the battery cells 10 at different positions in the battery cell assembly 101.

[0163] Please refer again to Figure 12 and further to Figures 13 and 14. Figure 13 is a schematic structural diagram of the current collector 315 of the battery 100 according to some embodiments of the present application; Figure 14 is a cross-sectional structural view of the current collector 315 shown in Figure 13. The current collector 315 includes a tube body 3151, a first flow channel interface 3152, and a second flow channel interface 3153. The first flow channel interface 3152 is connected to the first inlet 3108 of the heat exchange tube 314, and the second flow channel interface 3153 is connected to the second inlet 3109 of the heat exchange tube 314.

[0164] The current collector 315 further includes a separation structure 3154 . The separation structure 3154 is disposed inside the tube body 3151 . The separation structure 3154 separates the first flow channel interface 3152 from the second flow channel interface 3153 inside the tube body 3151 .

[0165] Specifically, the tube body 3151 can be used for collecting and diverting heat exchange fluid; the first flow channel interface 3152 and the second flow channel interface 3153 are arranged on the tube body 3151, and the first flow channel interface 3152 and the second flow channel interface 3153 are respectively connected to the inlet and outlet of the heat exchange tube 314, for inputting and outputting the heat exchange fluid into and out of the collecting pipe.

[0166] The partition structure 3154 is disposed within the tube body 3151 and separates the first flow channel interface 3152 from the second flow channel interface 3153 within the tube body 3151. That is, the first flow channel interface 3152 and the second flow channel interface 3153 are not connected within the tube body 3151. This allows the first flow channel interface 3152 and the second flow channel interface 3153 to serve as the input and output ends of the heat exchange tube 314, respectively. This allows the tube body 3151 and the heat exchange tube 314 to form a complete channel, allowing the heat exchange fluid to enter the heat exchange tube 314 from the tube body 3151 for heat exchange and then be discharged from the tube body 3151, completing the heat exchange process. Therefore, a single tube body 3151 can be used to complete both liquid inlet and outlet operations, thereby reducing the number of manifolds used and, consequently, reducing the production cost and space occupied by the thermal management assembly of the battery 100.

[0167] In the above technical solution, by setting the tube body 3151, the first inlet and outlet 3108 and the second inlet and outlet 3109 of the heat exchange tube 314 are integrated into one, and by setting a partition structure 3154 inside the tube body 3151, the first flow channel interface 3152 and the second flow channel interface 3153 are separated, so that the interior of the tube body 3151 can be partitioned so that the liquid inlet and discharge processes do not affect each other.

[0168] 12 and 13 , the number of heat exchange tubes 314, first flow channel interfaces 3152, and second flow channel interfaces 3153 are each multiple. For example, the number of first flow channel interfaces 3152 and second flow channel interfaces 3153 can be two, three, or more. The multiple first flow channel interfaces 3152 correspond one-to-one with and are connected to the first inlets and outlets 3108 of the multiple heat exchange tubes 314, and the multiple second flow channel interfaces 3153 correspond one-to-one with and are connected to the second inlets and outlets 3109 of the multiple heat exchange tubes 314.

[0169] In the above technical solution, by setting up multiple first flow channel interfaces 3152 and multiple second flow channel interfaces 3153, the collector 315 can be used to bring together multiple first inlets and outlets 3108 of multiple heat exchange tubes 314, and bring together multiple second inlets and outlets 3109 of multiple heat exchange tubes 314. On the one hand, the temperature of the heat exchange fluid in the multiple heat exchange tubes 314 can be made more balanced, thereby improving the heat exchange efficiency of the first heat exchange component 31, which is beneficial to improving the reliability of the battery 100. On the other hand, it can facilitate the installation of the first heat exchange component 31.

[0170] Among them, multiple first flow channel interfaces 3152 are connected inside the tube body 3151; and / or, multiple second flow channel interfaces 3153 are connected inside the tube body 3151. The collector 315 can be used to bring together multiple first inlets and outlets 3108 of multiple heat exchange tubes 314, and bring together multiple second inlets and outlets 3109 of multiple heat exchange tubes 314, so that the temperature of the heat exchange fluid in the multiple heat exchange tubes 314 is more balanced.

[0171] Specifically, multiple second flow channel interfaces 3153 are connected inside the tube body 3151, and along the extension direction of the tube body 3151, at least two second flow channel interfaces 3153 are respectively located on both sides of the first flow channel interface 3152, that is, at least two second flow channel interfaces 3153 are arranged at both ends of the tube body 3151, and multiple first flow channel interfaces 3152 are arranged between at least two second flow channel interfaces 3153.

[0172] In this way, the heat exchange fluid can flow out of the tube body 3151 from the second flow channel interfaces 3153 on both sides, and then flow back to the tube body 3151 from the first flow channel interface 3152 in the middle after heat exchange. Alternatively, the heat exchange fluid can flow out of the tube body 3151 from the first flow channel interface 3152 in the middle area of ​​the tube body 3151, and then flow back to the tube body 3151 from the second flow channel interfaces 3153 at both ends of the tube body 3151 after heat exchange. In this way, the heat exchange fluid can flow from the periphery of the battery 100 to the middle area to achieve heat exchange, or from the middle area of ​​the battery 100 to the periphery to achieve heat exchange, thereby improving the temperature uniformity of the battery 100, thereby reducing the assembly steps and installation space of the thermal management component, improving the temperature uniformity of the battery 100, and extending the service life of the battery 100.

[0173] In the above technical solution, by setting the collector 315, the partition structure 3154 is used to separate the multiple first flow channel interfaces 3152 and the multiple second flow channel interfaces 3153, and the multiple second flow channel interfaces 3153 are connected in the tube body 3151, so that the first flow channel interface 3152 and the second flow channel interface 3153 can be formed as the input end and the output end of the heat exchange tube 314 respectively, and then the work of liquid inlet and liquid discharge can be completed by using one tube body 3151, thereby reducing the number of collector pipes used and the use of external connecting pipes. It can reduce the production cost and occupied space of the heat exchange management component 314, and reduce the assembly steps and installation space of the thermal management component; in addition, the second flow channel interface 3153 includes multiple, and at least two second flow channel interfaces 3153 are located on both sides of the first flow channel interface 3152, which can make the heat exchange fluid flow from the surrounding area of ​​the battery 100 to the central area to achieve heat exchange, and can also make the heat exchange fluid flow from the central area of ​​the battery 100 to the surrounding area to achieve heat exchange, thereby improving the temperature uniformity of the battery 100 and extending the service life of the battery 100.

[0174] 13 and 14 , the tube body 3151 can be divided into a first space 3151a and a second space 3151b that are independent of each other by a partition structure 3154. The first space 3151a is connected to the first flow channel interface 3152, and the second space 3151b is connected to the second flow channel interface 3153. Along the extension direction of the tube body 3151, the second space 3151b includes a first section, a second section and a third section that are sequentially connected. The first section and the third section are respectively located on both sides of the first space 3151a, and the second section is side by side with the first space 3151a.

[0175] Specifically, the first space 3151a and the second space 3151b can be independent of each other and not connected to each other, forming two independent flow channels. The second space 3151b includes a first section, a second section, and a third section that are connected in sequence. The first section and the third section are each provided with a second flow channel interface 3153. The second space 3151b can connect multiple second flow channel interfaces 3153. The first space 3151a and the second section are arranged side by side, and the first space 3151a is connected to the first flow channel interface 3152. The first flow channel interface 3152 is further provided in the middle of the multiple second flow channel interfaces 3153.

[0176] For example, as shown in reference figures 13 and 14, there are two first flow channel interfaces 3152 and two second flow channel interfaces 3153, and the two second flow channel interfaces 3153 are arranged on both sides of the two first flow channel interfaces 3152. In the length direction of the tube body 3151, the second space 3151b is "C"-shaped, and the first space 3151a is arranged parallel to the second section and is arranged between the first section and the third section.

[0177] In the above technical solution, by setting the first space 3151a and the second space 3151b to be independent of each other and not connected to each other, two independent flow channels can be formed inside the tube body 3151, so that the inflow and discharge of the heat exchange fluid do not interfere with each other. At the same time, the first space 3151a and the second space 3151b are arranged side by side, thereby reducing the size of the tube body 3151, thereby reducing the space occupied by the collecting pipe.

[0178] Furthermore, as shown in Figures 13 and 14, the partition structure 3154 may include a first partition plate 3154a and a second partition plate 3154b, the first partition plate 3154a is used to separate the second section and the first space 3151a, the second partition plate 3154b includes at least two and is respectively located at both ends of the first partition plate 3154a along the extension direction of the tube body 3151, the second partition plate 3154b is used to separate the first section and the first space 3151a, as well as, the third section and the first space 3151a.

[0179] Specifically, the first partition plate 3154a can be formed into a plate body of a certain size. The size of the first partition plate 3154a can be set according to the position size of the tube body 3151 and the first flow channel interface 3152. The first partition plate 3154a extends along the length direction of the tube body 3151 (for example, the X direction shown in Figure 13), and the two ends of the first partition plate 3154a in the width direction are sealedly connected to the inner wall surface of the tube body 3151. In the width direction of the tube body 3151 (for example, the Y direction shown in Figure 13), it is used to separate the second section and the first space 3151a, so that the second section and the first space 3151a are arranged side by side in the width direction of the tube body 3151.

[0180] The second partition plates 3154b include at least two, that is, the second partition plates 3154b may include two, three or more. When the second partition plates 3154b only include two, the second partition plates 3154b are respectively located at both ends of the first partition plate 3154a in the length direction, and are sealed with the first partition plate 3154a and the inner wall surface of the tube body 3151, so that the first space 3151a and the second space 3151b can be completely independent and not connected to each other.

[0181] In the above technical solution, by providing the first partition plate 3154a and the second partition plate 3154b, two independent spaces can be formed inside the tube body 3151, so that the inflow and outflow of liquid do not interfere with each other, thereby improving the heat exchange effect of the battery 100.

[0182] Please refer to Figure 11 again. There are multiple heat exchange tubes 314, and the collectors 315 include two. One of the collectors 315 has multiple liquid inlet interfaces 3155, and the multiple liquid inlet interfaces 3155 correspond one-to-one to and are connected to the first inlets and outlets 3108 of the multiple heat exchange tubes 314. The other collector 315 has multiple liquid discharge interfaces 3156, and the multiple liquid discharge interfaces 3156 correspond one-to-one to and are connected to the second inlets and outlets 3109 of the multiple heat exchange tubes 314.

[0183] The heat exchange fluid entering from one of the current collectors 315 can flow into the corresponding heat exchange tubes 314 from the first inlets and outlets 3108 of the multiple heat exchange tubes 314 respectively, and finally flow into another current collector 315 from the second inlets and outlets 3109 of the multiple heat exchange tubes 314.

[0184] In the above technical solution, by providing two current collectors 315, one of the current collectors 315 is used for liquid inlet and the other is used for liquid discharge, the structure of the current collectors 315 can be simplified, and the inflow and outflow of the heat exchange fluid can be easily controlled.

[0185] Referring to Figures 15 and 16 , Figure 15 is a schematic diagram of the battery 100 shown in Figure 3 excluding the cell assembly 101; Figure 16 is an exploded view of the structure shown in Figure 15 . The bottom wall 211 of the housing 21 defines a receiving groove 213. The first heat exchange member 31 is at least partially disposed within the receiving groove 213, and the first adhesive layer 34 at least partially fills the receiving groove 213.

[0186] In the above technical solution, the provision of the accommodating groove 213 can, on the one hand, position the heat exchange tube 314, reducing the risk of the heat exchange tube 314 shaking, improving the installation stability and reliability of the heat exchange tube 314, and thus improving the reliability of the battery 100. On the other hand, it can increase the connection area between the heat exchange tube 314 and the bottom wall 211 of the box body 21, thereby improving the reliability of the heat exchange tube 314 fixed to the box body 21. In addition, because the battery cell assembly 101 can contact the bottom wall 211 of the box body 21 and the heat exchange tube 314, the heat exchange efficiency can be improved, thereby further improving the reliability of the battery 100.

[0187] In addition, a receiving groove 213 is provided on the bottom wall 211 of the box body 21, so that the bottom wall 211 of the box body 21 has a concave-convex structure, thereby improving the structural strength of the box body 21, and the heat exchange tube 314 is provided in the receiving groove 213, which is equivalent to the reinforcement structure of the box body 21, and can further improve the structural strength of the box body 21.

[0188] Please refer to Figure 15 again. The inner surface of the bottom wall 211 of the box body 21 has an installation area 201, and the installation area 201 is used to place the battery cell assembly 101. The battery 100 also includes a second insulating member 72, which is at least partially arranged in the installation area 201 except for the position of the accommodating groove 213, so that the second insulating member 72 is arranged between the bottom wall 211 of the box body 21 and the battery cell assembly 101. The first adhesive layer 34 is arranged in the installation area 201 to cover the second insulating member 72.

[0189] Specifically, the second insulating member 72 can separate the bottom wall 211 of the box body 21 from the battery cell assembly 101, and the first adhesive layer 34 covers the second insulating member 72, connecting the second insulating member 72 to the battery cell assembly 101. The second insulating member 72 can be formed on the inner side of the box body 21 by spraying, electrophoresis, or dipping, or can be bonded to the inner side of the box body 21, or can be hot-pressed on the inner side of the box body 21.

[0190] In the above technical solution, the second insulating member 72 is arranged in the installation area 201 without the accommodating groove 213, so as to achieve insulation between the bottom wall 211 of the box body 21 and the battery cell assembly 101, reduce the corrosion problem caused by direct contact between the bottom wall 211 of the box body 21 and the battery cell assembly 101, and thus improve the reliability of the battery 100.

[0191] In addition, since the first adhesive layer 34 covers the second insulating member 72 , the bottom wall 211 of the box body 21 is insulated from the battery cell assembly 101 without affecting the arrangement of the first adhesive layer 34 , thereby improving connection reliability.

[0192] Referring again to FIG. 15 , the receiving groove 213 includes a first groove section 2131, a second groove section 2133, and a third groove section 2134. The shape of the first groove section 2131 is substantially the same as that of the first pipe section 3141, the shape of the second groove section 2133 is substantially the same as that of the second pipe section 3144, and the shape of the third groove section 2134 is substantially the same as that of the third pipe section 3149. The first pipe section 3141 is at least partially disposed within the first groove section 2131, the second pipe section 3144 is at least partially disposed within the second groove section 2133, and the third pipe section 3149 is at least partially disposed within the third groove section 2134.

[0193] In the above technical solution, by setting the accommodating groove 213 to include a first groove section 2131, a second groove section 2133 and a third groove section 2134, the first groove section 2131 can position the first tube section 3141, the second groove section 2133 can position the second tube section 3144, and the third groove section 2134 can position the third tube section 3149, so that the arrangement of the heat exchange tube 314 is more stable, the heat exchange efficiency can be further improved, and thus the reliability of the battery 100 can be improved.

[0194] Please refer to Figure 17, which is a partial assembly diagram of a battery 100 according to another embodiment of the present application. An expansion beam 60 is disposed within the housing 21. The expansion beam 60 includes a first expansion beam 61 and a second expansion beam 62. The first expansion beam 61 and the second expansion beam 62 are disposed opposite each other, and each of the first expansion beam 61 and the second expansion beam 62 has a cavity therein.

[0195] The installation area 201 is located between the first expansion beam 61 and the second expansion beam 62 , and the battery cell assembly 101 is located between the first expansion beam 61 and the second expansion beam 62 .

[0196] In the above technical solution, by providing the first expansion beam 61 and the second expansion beam 62, when the battery cell 10 of the battery cell assembly 101 has an expansion tendency, the first expansion beam 61 and the second expansion beam 62 abut against the battery cell assembly 101, and the deformation of the cavity of the first expansion beam 61 and the second expansion beam 62 is used to absorb and transmit the expansion force, thereby reducing the probability of deformation of the battery cell 10 due to the expansion force.

[0197] The expansion beam 60 may be manufactured by an extrusion process, or may be manufactured by a stamping process into a plurality of plates, which are then assembled to form the expansion beam 60 .

[0198] Referring again to FIG. 8 , the thickness h of the first adhesive layer 34 excluding the accommodating groove 213 is between 0.5 mm and 2 mm. For example, the thickness h of the first adhesive layer 34 excluding the accommodating groove 213 is 0.5 mm, 0.8 mm, 1 mm, 1.5 mm, or 2 mm, allowing the first adhesive layer 34 to fill the gaps between the first heat exchange member 31, the bottom of the battery cell assembly 101, and the bottom wall 211 of the housing 21.

[0199] In the above technical solution, by limiting the thickness of the first adhesive layer 34 at the position excluding the accommodating groove 213 to meet the above conditions, the first adhesive layer 34 can fully cover the first insulating member 71 and the second insulating member 72, thereby improving the connection reliability between the first insulating member 71 and the battery cell assembly 101, and the second insulating member 72 and the battery cell assembly 101, thereby improving the connection reliability between the bottom wall 211 of the box body 21 and the battery cell assembly 101, and the first heat exchange member 31 and the battery cell assembly 101, thereby improving the reliability of the battery 100.

[0200] Please refer to FIG. 16 again. A second adhesive layer 35 is provided between the side of the first heat exchange member 31 facing away from the battery cell assembly 101 and the bottom wall 211 of the box body 21 .

[0201] Specifically, the first heat exchange component 31 can be pre-fixed on the bottom wall 211 of the box body 21, and then the first adhesive layer 34 is set so that the first adhesive layer 34 can cover the first heat exchange component 31 and the installation area 201 where the battery cell assembly 101 is set in the bottom wall 211 of the box body 21. Finally, the battery cell assembly 101 is placed so that the battery cell assembly 101 can be fixed in the box body 21.

[0202] In the above technical solution, by providing the second adhesive layer 35 , the first heat exchange element 31 can be pre-fixed in the box body 21 , thereby facilitating the installation of other components.

[0203] For example, the first adhesive layer 34 and the second adhesive layer 35 may be thermally conductive adhesive.

[0204] The housing 21 is a one-piece stamped and formed part. In the above technical solution, since the bottom wall 211 and the surrounding wall 212 of the housing 21 are stamped and formed in one piece, there is no need to consider sealing issues at the connection between the bottom wall 211 and the surrounding wall 212, which can improve the sealing effect. This can prevent muddy water from seeping into the housing 21 from the connection between the bottom wall 211 and the surrounding wall 212 and affecting the battery cell assembly 101 in the housing 21, thereby improving the reliability of the battery 100. In addition, the one-piece stamped and formed housing 21 does not require splicing. On the one hand, it can save a large number of bolts on the original profile housing 21, reducing costs, and on the other hand, it eliminates the connection steps, which can improve production efficiency.

[0205] In addition, the integrally stamped box body 21 can prevent the substances ejected when the battery 100 has thermal runaway and the heat exchange fluid leaked from the first heat exchange component 30 from flowing outside the box body 21, thereby reducing direct contact between the human body and the leaked substances, protecting personal safety, and reducing environmental pollution.

[0206] Please refer to Figures 18 and 19. Figure 18 is a schematic diagram of the assembly of a battery 100 according to yet another embodiment of the present application; Figure 19 is a schematic diagram of the structure of the battery cell 10 and the second heat exchange element 32 shown in Figure 18. The battery cell assembly 101 includes a plurality of battery cells 102, each of which includes a plurality of battery cells 10. The battery cells 10 in each battery cell 102 are arranged along a first direction, and the battery cells 102 are arranged along a second direction, with the first and second directions forming an angle with each other.

[0207] As shown in Figure 18, for the battery cell assembly 101, the X direction in Figure 18 is the width direction of the battery cell assembly 101, and the Y direction is the length direction of the battery cell assembly 101. For the battery cell 10, the X direction in Figure 18 is the length direction of the battery cell 10, and the Y direction is the thickness direction of the battery cell 10. The battery cell assembly 101 includes a plurality of battery cells 102, and the plurality of battery cells 102 are arranged along the second direction, that is, the plurality of battery cells 102 are stacked in the thickness direction of the battery cell 10. Each battery cell 102 includes a plurality of battery cells 10, and the plurality of battery cells 10 of each battery cell 102 are arranged along the first direction, that is, the plurality of battery cells 10 of each battery cell 102 are stacked in the length direction of the battery cell 10.

[0208] As shown in Figure 19, the first heat exchange assembly 30 further includes a second heat exchange member 32, which is disposed between two adjacent battery cells 102. In other words, the second heat exchange member 32 can be disposed in a position where the large surfaces of two adjacent battery cells 10 face each other, so that the large surfaces of the two adjacent battery cells 10 can both contact the second heat exchange member 32, thereby improving the heat exchange efficiency of the battery cells 10 and further enhancing the reliability of the battery 100.

[0209] Therefore, in the above technical solution, by setting the second heat exchange component 32, the contact area between the battery cell 10 and the heat exchange component can be increased, thereby increasing the contact area between the battery cell assembly 101 and the first heat exchange assembly 30, thereby greatly improving the heat exchange efficiency and improving the reliability of the battery 100.

[0210] 2 , the box assembly 20 further includes a box cover 22 . The box cover 22 is connected to the top of the box body 21 and has a top wall.

[0211] Please refer to Figure 20 again, which is a diagram of the assembly of the battery 100 according to some other embodiments of the present application. The first heat exchange assembly 30 further includes a third heat exchange member 33 , which is at least partially located between the top wall of the case cover 22 and the battery cell assembly 101 .

[0212] In the above technical solution, by providing the third heat exchange component 33 , the contact area between the battery cell assembly 101 and the first heat exchange assembly 30 can be increased, thereby significantly improving the heat exchange efficiency and enhancing the reliability of the battery 100 .

[0213] Please refer to FIG. 20 again. The battery 100 further includes a second heat exchange component 40 . The second heat exchange component 40 is attached to the outside of the box component 20 .

[0214] In the above technical solution, by arranging the second heat exchange component 40 on the outside of the box body 21, there is no need to consider the insulation, corrosion protection and other issues between the heat exchange component and the battery cell 10 in the box body 21, thereby simplifying the insulation and corrosion protection design of the second heat exchange component 40, reducing the processing difficulty and production cost, solving the short circuit problem between the battery cell 10 and the second heat exchange component 40, and improving the reliability of the battery 100. Moreover, by placing the second heat exchange component 40 outside the box body assembly 20, the second heat exchange component 40 will not occupy the space in the box body 21, so that the capacity of the battery 100 will not be reduced due to the installation of the heat exchange component, thereby greatly improving the capacity of the battery 100.

[0215] In the embodiment where the inner surface of the bottom wall 211 of the housing 21 is provided with a receiving groove 213, the receiving groove 213 can be integrally formed during the stamping process of the housing 21, or can be separately machined after the housing 21 is stamped. During the machining of the receiving groove 213, a mounting groove 214 can be integrally formed on the outer surface of the bottom wall 211 of the housing 21, and the second heat exchange assembly 40 can be disposed in the mounting groove 214.

[0216] The installation groove 214 is provided. On the one hand, the second heat exchange component 40 can be positioned to reduce the risk of shaking of the second heat exchange component 40, and the installation stability and reliability of the second heat exchange component 40 can be improved, thereby improving the reliability of the battery 100. On the other hand, the connection area between the second heat exchange component 40 and the bottom wall 211 of the box body 21 can be increased, thereby improving the reliability of the second heat exchange component 40 fixed on the box body 21.

[0217] In addition, since the battery cell assembly 101 can contact the bottom wall 211 of the box body 21, the connection area between the second heat exchange assembly 40 and the bottom wall 211 of the box body 21 is increased, which can further improve the heat exchange efficiency and thus further enhance the reliability of the battery 100.

[0218] Please refer to Figure 16 and Figure 17 again. According to some embodiments of the present application, the battery 100 includes a box assembly 20, a cell assembly 101, a first heat exchange assembly 30, a first expansion beam 61, a second expansion beam 62, a connecting beam 53, a first fixed beam 51, a second fixed beam 52, a first mounting beam 81, a second mounting beam 82, and a bottom guard plate 90.

[0219] The box assembly 20 includes a box body 21 and a box cover 22 . The box body 21 is an integral stamped part having a bottom wall 211 and a surrounding wall 212 .

[0220] The first fixed beam 51 and the second fixed beam 52 are arranged opposite to each other in the first direction, and the length directions of the first fixed beam 51 and the second fixed beam 52 both extend along the second direction and are arranged opposite to the two oppositely arranged side walls of the surrounding wall 212 of the box body 21. The first expansion beam 61 and the second expansion beam 62 are arranged opposite to each other in the second direction, and the length directions of the first expansion beam 61 and the second expansion beam 62 both extend along the first direction. The two ends of the first expansion beam 61 in the length direction are respectively connected to one end of the first fixed beam 51 and one end of the second fixed beam 52, and the two ends of the second expansion beam 62 in the length direction are respectively connected to the other end of the first fixed beam 51 and the other end of the second fixed beam 52. At least one of the first expansion beam 61 and the second expansion beam 62 is connected to a support member on a side facing away from the battery cell assembly 101, and the support member is connected to the bottom wall 211 of the box body 21 or the surrounding wall 212 of the box body 21. The length direction of the connecting beam 53 extends along the first direction, and the two ends of the connecting beam 53 in the length direction are respectively connected to the middle part of the first fixed beam 51 and the middle part of the second fixed beam 52.

[0221] The first heat exchange assembly 30 includes a first heat exchange element 31 , and the first heat exchange element 31 includes a heat exchange tube 314 and a fluid collector 315 .

[0222] The heat exchange tube 314 is arranged in the box body 21 and is located between the first expansion beam 61 and the second expansion beam 62. There are multiple heat exchange tubes 314, and each heat exchange tube 314 includes a first tube segment 3141, a second tube segment 3144 and a second tube segment 3144. The first tube segment 3141 includes multiple first heat exchange parts 3142 and multiple first bending parts 3143. The multiple first heat exchange parts 3142 are arranged along the first direction and each first heat exchange part 3142 extends along the second direction. Two adjacent first heat exchange parts 3142 are connected by the first bending part 3143, so that the multiple first heat exchange parts 3142 and the multiple first bending parts 3143 are connected in sequence to form a multi-bending structure. One end of the second tube segment 3144 is connected to one end of the first tube segment 3141, and one end of the third tube segment 3149 is connected to the other end of the first tube segment 3141.

[0223] There are two current collectors 315 and they are arranged on one side of the heat exchange tube 314, one of the current collectors 315 is connected to one end of the two heat exchange tubes 314, and the other current collector 315 is connected to the other end of the two heat exchange tubes 314. The two current collectors 315 pass through the two avoidance holes 6302 on the first expansion beam 61 respectively, so that the current collectors 315 can be connected to the water nozzle through the hose.

[0224] The battery cell assembly 101 is disposed within the housing 21 and above the first heat exchange member 31. The battery cell assembly 101 includes a plurality of battery cells 102 arranged along the second direction. Each battery cell 102 includes a plurality of battery cells 10, each of which is arranged along the first direction. The bottom of each battery cell 102 contacts at least two first heat exchange members 3142.

[0225] The first mounting beam 81 and the second mounting beam 82 are arranged outside the box body 21 and are located on opposite sides of the box body 21. The first mounting beam 81 and the second mounting beam 82 are spaced apart in the first direction, and the length directions of the first mounting beam 81 and the second mounting beam 82 both extend along the second direction.

[0226] The bottom guard plate 90 is disposed outside the box body 21 and opposite to the bottom wall 211 of the box body 21 . Two opposite sides of the bottom guard plate 90 are connected to the first mounting beam 81 and the second mounting beam 82 respectively.

[0227] According to some embodiments of the present application, the present application further provides an electric device 1000 including the battery 100 described in the above solution, and the battery 100 is used to provide electrical energy to the electric device 1000.

[0228] The electrical device 1000 may be any of the aforementioned devices or systems employing the battery 100. Since the battery 100 according to the present application has the aforementioned technical effects, the electrical device 1000 according to the present application also has the aforementioned technical effects. That is, by employing the aforementioned battery 100, the reliability of the electrical device 1000 can be improved, and the production efficiency of the electrical device 1000 can also be increased, thereby reducing costs.

[0229] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, wherein: include: The box assembly comprises a box having a bottom wall and a surrounding wall; A first heat exchange assembly is provided in the box body and includes a first heat exchange element, wherein the first heat exchange element is fixed to the bottom wall of the box body; A battery cell assembly is provided in the box assembly, wherein the side of the battery cell assembly facing the bottom wall of the box is bonded to the bottom wall of the box and the first heat exchange member through a first adhesive layer; The first insulating member is at least partially disposed between the side of the first heat exchange member facing away from the bottom wall of the box and the battery core assembly, and the first adhesive layer covers the first insulating member.

2. The battery according to claim 1, wherein The first heat exchange element comprises: a heat exchange tube, wherein the first insulating member is at least partially disposed between a side of the heat exchange tube facing away from the bottom wall of the box and the battery core assembly; A current collector is connected to the heat exchange tube.

3. The battery according to claim 2, wherein The first insulating member wraps the outer peripheral wall of the heat exchange tube.

4. The battery according to claim 2, wherein The heat exchange tube is a flat tube, and two walls of the flat tube that are arranged opposite to each other in the thickness direction are respectively connected to the battery core assembly and the bottom wall of the box assembly.

5. The battery according to claim 2, wherein The heat exchange tube includes a first tube segment and a second tube segment, one end of the first tube segment is bent and connected to one end of the second tube segment, and the other end of the second tube segment is connected to the current collector; Wherein, the first insulating member includes a first insulating portion and a second insulating portion, the first insulating portion is arranged between the side of the first tube segment facing away from the bottom wall of the box body and the battery cell assembly, and the second insulating portion is arranged between the side of the second tube segment facing away from the bottom wall of the box body and the battery cell assembly.

6. The battery according to claim 5, wherein The first insulating portion wraps the outer peripheral wall of the first tube segment.

7. The battery according to claim 5, wherein The second insulating portion wraps the outer peripheral wall of the second tube segment.

8. The battery according to claim 5, wherein The first pipe section includes a plurality of first heat exchange parts, which are arranged at intervals along a first direction and are bent and connected in sequence.

9. The battery according to claim 8, wherein The first pipe section further includes a first bending portion, which is arc-shaped and bent and connected between two adjacent first heat exchange portions.

10. The battery according to claim 8, wherein The first heat exchange portion extends along a second direction, and the second pipe segment is disposed on a same side of the plurality of first pipe segments and extends along the first direction.

11. The battery according to any one of claims 5 to 9, wherein The second pipe section is bent to form a U-shaped area, and the first pipe section is bent and arranged in the U-shaped area.

12. The battery according to any one of claims 5 to 11, wherein The heat exchange tube further includes a third tube segment, and the first tube segment is connected between the third tube segment and the second tube segment; One end of the third pipe segment is connected to the other end of the first pipe segment, and the other end of the third pipe segment is connected to the current collector; The first insulating member includes a third insulating portion, and the third insulating portion is at least partially disposed between the battery core assembly and a side of the third tube segment facing away from the bottom wall of the box.

13. The battery according to claim 12, wherein The third insulating portion wraps the outer peripheral wall of the third tube segment.

14. The battery according to any one of claims 2 to 13, wherein The number of the heat exchange tubes is one or more. When the number of the heat exchange tubes is more than one, the heat exchange tubes are arranged at intervals along the first direction, or are arranged around each other.

15. The battery according to any one of claims 1 to 14, wherein The bottom wall of the box body has an accommodating groove, the first heat exchange member is at least partially disposed in the accommodating groove, and the first adhesive layer is at least partially filled in the accommodating groove.

16. The battery according to claim 15, wherein The inner surface of the bottom wall of the box body has an installation area for placing the battery core assembly; The battery also includes: a second insulating member, which is at least partially arranged at a position of the installation area excluding the accommodating groove, so that the second insulating member is arranged between the bottom wall of the box and the battery cell assembly, and the first adhesive layer is arranged in the installation area to cover the second insulating member.

17. The battery according to claim 16, wherein A first expansion beam and a second expansion beam are provided in the box body, the first expansion beam and the second expansion beam are arranged opposite to each other, and each of the first expansion beam and the second expansion beam has a cavity therein; The installation area is located between the first expansion beam and the second expansion beam, and the battery cell assembly is located between the first expansion beam and the second expansion beam.

18. The battery according to claim 15, wherein The thickness of the first adhesive layer at a position excluding the accommodating groove is 0.5 mm to 2 mm.

19. The battery according to any one of claims 1 to 18, wherein A second adhesive layer is provided between the side of the first heat exchange component facing away from the battery core assembly and the bottom wall of the box.

20. The battery according to any one of claims 1 to 19, wherein The box body is an integral stamping part.

21. The battery according to any one of claims 1 to 20, wherein The battery cell assembly includes a plurality of battery cells, each of which includes a plurality of battery cells. The plurality of battery cells in each battery cell are arranged along a first direction, and the plurality of battery cells are arranged along a second direction. The first direction and the second direction are arranged at an angle to each other. The first heat exchange assembly further includes a second heat exchange element, which is disposed between two adjacent battery cells.

22. The battery according to any one of claims 1 to 21, wherein The box assembly further includes a box cover, which is connected to the upper part of the box and has a top wall; The first heat exchange assembly further includes a third heat exchange member, which is at least partially located between the top wall of the box cover and the battery core assembly.

23. The battery according to any one of claims 1 to 22, wherein Also includes: The second heat exchange component is arranged outside the box component.

24. An electrical device, wherein: Comprising a battery according to any one of claims 1-23.

Images