Battery and electric device

Abstract

The utility model discloses a battery and a power utilization device, the battery comprises a box body, a heat exchange piece and a battery monomer, and an accommodating space is formed in the box body; the battery monomers are arranged in the accommodating space; the heat exchange part comprises a heat exchange section, the heat exchange section is arranged on one side of the wall surface of the battery monomer and is used for exchanging heat with the battery monomer, a plurality of cavities are formed in the heat exchange section in the first direction, and the first direction is perpendicular to the wall surface. The battery disclosed by the utility model comprises the heat exchange piece, the heat exchange piece comprises the heat exchange section, the structural strength of the heat exchange section with the plurality of cavities is high, the problems of deformation, collapse and the like are difficult to occur under the action of external force in the use process, the risk of airtight failure is reduced, the overall structural strength of the heat exchange piece is improved, and the service life of the heat exchange piece is prolonged; and different heat exchange media can be introduced into the plurality of cavities or heat exchange media can be introduced in different modes, so that a better cooling effect can be achieved, and the battery disclosed by the utility model has a better cooling effect on the battery monomers and higher external damage resistance.

Description

Technical Field

[0001] The utility model relates to the field of batteries, and in particular to a battery and an electric device using the same. Background Art

[0002] Generally, a heat exchange component for regulating the temperature of battery cells, such as a heat exchange tube, is provided in the battery box. Although the heat exchange tube in the related art has a certain structural strength of its own, it cannot withstand harsh system test conditions such as bottom balls, and is prone to deformation after being impacted, affecting the cooling effect. Summary of the Utility Model

[0003] This application aims to solve at least one of the technical problems existing in the prior art. To this end, an object of this application is to provide a battery with better cooling effect on battery cells and stronger resistance to external damage.

[0004] The battery according to the embodiment of this application includes a box body, a heat exchange member, and battery cells. An accommodation space is formed inside the box body; the battery cells are arranged in the accommodation space; the heat exchange member includes a heat exchange section, and the heat exchange section is arranged on one side of the wall surface of the battery cells for heat exchange with the battery cells. A cavity is arranged in the heat exchange section, and a plurality of cavities are arranged along a first direction, and the first direction is perpendicular to the wall surface.

[0005] In the above technical solution, the heat exchange member includes a heat exchange section, and a plurality of cavities are arranged along the first direction in the heat exchange section. The heat exchange section with a plurality of cavities has high structural strength, and is less likely to deform or collapse under external force during use, with a lower risk of airtight failure, which is beneficial to improving the overall structural strength and service life of the heat exchange member; at the same time, in this application, a plurality of cavities are arranged along the first direction. When the cavities on the outer side are impacted by external force, they can play a buffering role, so that the force transmitted to the inner cavities and the battery cells is gradually weakened, playing a role in protecting the inner cavities and the battery cells, reducing the possibility of heat exchange failure of the heat exchange member, and improving the use reliability of the battery cells; in addition, the plurality of cavities are independent of each other, and different heat exchange media can be introduced into the plurality of cavities or the flow parameters of the heat exchange media in different cavities can be controlled, which is beneficial to achieving the purpose of more refined control of the temperature of the battery and achieving a better cooling effect.

[0006] In some embodiments of this application, in the first direction, heat exchange media are arranged in any two adjacent cavities, and the heat exchange media in any two adjacent cavities are different. In this technical solution, more efficient heat transfer can be realized in a smaller space, and the heat exchange process can be optimized for a specific temperature range, thereby overall improving the heat exchange efficiency of the heat exchange member.

[0007] In some embodiments of the present application, in the first direction, heat exchange medium is disposed in any two adjacent cavities, and the heat exchange medium in any two adjacent cavities is the same.

[0008] In the above technical solution, when one of the cavities is blocked and leaks, the remaining cavities can still perform the heat exchange function normally. Compared with the single-cavity design, the heat exchange component of the present application has higher redundancy and better reliability.

[0009] In some embodiments of the present application, in the first direction, a heat exchange medium is disposed in the cavity close to the battery cell, and the cavity away from the battery cell is a hollow cavity or is provided with a buffer.

[0010] In the above technical solution, the cavity close to the battery cell exchanges heat with the box body, and the cavity far away from the battery cell plays a protective role, so as to enhance the impact resistance of the heat exchange component and reduce the possibility of leakage of the heat exchange medium in the cavity close to the battery cell. Even if the cavity far away from the battery cell is damaged, the heat exchange component can still realize normal heat exchange function and achieve the effect of preventing bottom knocking.

[0011] In some embodiments of the present application, the heat exchanger is arranged on the outside of the box. In this technical solution, on the one hand, the heat exchanger is arranged on the outside of the box, which is conducive to saving space inside the box, increasing the space ratio of the battery cell in the accommodation space, and thus increasing the energy density of the battery. On the other hand, the heat exchanger is arranged on the outside of the box, which also helps to simplify the assembly process of the battery and reduce the difficulty of battery assembly, thereby helping to reduce costs. In addition, the external placement of the heat exchanger is also conducive to disassembly and replacement, and is convenient for maintenance and repair of the heat exchanger.

[0012] In some embodiments of the present application, the battery further includes a protective member, which is attached to the box wall of the box body and covers the heat exchanger. In this technical solution, when the box body is impacted by an external force, the protective member will be impacted first, and the protective member can play a role in buffering or resisting the impact, thereby reducing the possibility of the heat exchanger or the box wall being subjected to a large impact.

[0013] In some embodiments of the present application, the protective member is made of a buffer material and / or a heat-insulating material. In this technical solution, the use of a buffer material as a protective member can buffer and absorb part of the external force and enhance the ability of the battery box to resist external damage. The use of a heat-insulating material as a protective member can reduce the heat loss of the heat exchanger during operation and improve the utilization efficiency of the heat of the heat exchange medium.

[0014] In some embodiments of the present application, the heat exchange member is disposed close to the bottom wall of the box body, or the heat exchange member is disposed close to the side wall of the box body. In this technical solution, since the area of the bottom wall of the box body is relatively large, by disposing the heat exchange member close to the bottom wall of the box body, it is beneficial to increase the area of the heat exchange member, thereby being beneficial to improving the heat exchange efficiency of the battery. Moreover, the bottom wall of the box body is generally far away from the electrical device, so that sufficient space can be provided for arranging the heat exchange member and it is beneficial to the maintenance and replacement of the heat exchange member. By disposing the heat exchange member close to the side wall of the box body, the heat exchange member can be far away from the bottom of the electrical device, thereby reducing the probability of damage to the heat exchange member caused by bottom collision and being beneficial to improving the reliability of the heat exchange member, and thus improving the reliability of the battery.

[0015] In some embodiments of the present application, a plurality of cavities arranged in the first direction form a cavity group, and there are a plurality of cavity groups arranged in the second direction, and the second direction is parallel to the wall surface. In this technical solution, for the same heat exchange section, there are a plurality of cavity groups arranged in the second direction. In this way, it is beneficial to further improve the structural strength of the heat exchange section, and it is less likely to deform, collapse, etc. when subjected to external forces during use.

[0016] In some embodiments of the present application, in any two adjacent cavity groups, the heat exchange media of two adjacent cavities in the second direction are different.

[0017] In the above technical solution, according to the temperature rise difference in different regions of the box wall, different heat exchange media can be introduced into the cavity groups at the corresponding positions, so as to reduce the use cost of the heat exchange member, improve the use efficiency of the heat exchange medium, more accurately control the battery temperature, extend the battery life, and improve the use safety of the battery.

[0018] In some embodiments of the present application, in any two adjacent cavity groups, the heat exchange media of two adjacent cavities in the second direction are the same. In this technical solution, when one of the cavities is blocked and leaks, the remaining cavities can still normally realize the heat exchange function. Compared with the single-cavity design, the heat exchange member of the present application has a higher redundancy and better reliability.

[0019] In some embodiments of the present application, the heat exchange section includes a plurality of pipe bodies, each pipe body forms a cavity inside, and the plurality of pipe bodies are connected. In this technical solution, the heat exchange section is obtained by connecting a plurality of pipe bodies side by side with each other. In this way, the production difficulty of the heat exchange section is low, the manufacturability is better, and the use cost is lower.

[0020] In some embodiments of the present application, the heat exchange section is tubular, the heat exchange section is an integrally formed part, and a plurality of cavities are formed inside. In this technical solution, the tube walls can be shared between adjacent cavities, which is beneficial to reducing the size of the heat exchange section. Moreover, there is no air gap between adjacent cavities, the thermal resistance of heat conduction of the heat exchange section is smaller, the heat conduction effect is better, and the heat exchange efficiency between adjacent cavities is higher. At the same time, the entire heat exchange section is integrally formed without seams or welding points, so the possibility of leakage at the joint part can be reduced, and the sealing performance and reliability of the heat exchange section are improved.

[0021] In some embodiments of the present application, the heat exchange member is disposed in a fitting manner on the box wall of the box body. In this technical solution, by disposing the heat exchange member and the box wall of the box body in a fitting manner, in this way, the contact area between the box wall and the heat exchange member is larger, which is beneficial to achieving more efficient and rapid heat exchange.

[0022] In some embodiments of the present application, there are a plurality of heat exchange sections. Some of the plurality of heat exchange sections are spaced apart along the second direction and are connected in sequence. Each heat exchange section extends along the third direction, the third direction is perpendicular to the second direction, and the third direction and the second direction are parallel to the wall surface. In this technical solution, the arrangement of the heat exchange sections has a good correspondence with the battery cells in the battery box body, and it can enable as many battery cells as possible to obtain a good heat dissipation effect.

[0023] In some embodiments of the present application, the battery includes battery cells. The battery cells are arranged in multiple rows, and each row of battery cells is arranged in multiple numbers. Each row of battery cells corresponds to at least one heat exchange section. In the above technical solution, each row of battery cells corresponds to at least one heat exchange section. In this way, it is beneficial to improve the heat exchange efficiency between the heat exchange member and the battery cells.

[0024] In some embodiments of the present application, the heat exchange section is disposed near the edge of the battery cell.

[0025] In the above technical solution, the edge of the battery cell is usually the junction position of the side walls of the housings of two battery cells. The structural strength at this position is relatively high and it is not easy to deform when subjected to external force impact. By disposing the heat exchange section at a position near the edge of the battery cell, the heat exchange section is not easy to deform.

[0026] In some embodiments of the present application, the heat exchange section is disposed in a centered manner with respect to the battery cell.

[0027] In the above technical solution, the heat generated during the use of the battery cell mainly concentrates in the middle of the battery cell. By arranging the heat exchange section corresponding to the middle of the battery cell, the heat transfer path can be effectively shortened. The heat exchange section can directly contact the core position where the heat is generated, which helps to more quickly and evenly export the heat, reduce the phenomenon of local overheating, improve the thermal management efficiency, and at the same time can also more quickly sense and respond to the temperature change of the battery cell, and timely adjust the cooling or heating. Especially in the scenarios of high-power output or fast charging, it can quickly remove the excess heat and reduce the risk of thermal runaway.

[0028] In a second aspect, an electrical device provided by an embodiment of the present application includes the above battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0030] Figure 1 is a schematic diagram of a vehicle provided by some embodiments of the present application;

[0031] Figure 2 is an exploded view of a battery provided by some embodiments of the present application;

[0032] Figure 3 is a bottom view of a battery provided by some embodiments of the present application;

[0033] Figure 4 is Figure 3 a sectional view taken along line A-A;

[0034] Figure 5 is Figure 4 a partial enlarged view of part B in;

[0035] Figure 6 is a partial structural schematic diagram of a battery provided by some embodiments of the present application;

[0036] Figure 7 is a top view of a battery provided by some embodiments of the present application;

[0037] Figure 8 is a partial structural schematic diagram of a battery provided by some other embodiments of the present application.

[0038] Reference numerals:

[0039] Electrical device 1000; Battery 100; Box body 10; First part 101; Second part 102; Bottom wall 1031; Enclosing wall 1032; Groove 1033;

[0040] Heat exchange member 104; Heat exchange section 1041; Cavity 1042; Cavity group 1043; Pipe body 1044;

[0041] Protective member 105;

[0042] Battery cell 20; protection plate 30; first direction F1; second direction F2; third direction F3. Specific embodiments

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the description and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of the present application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0045] Referring to the "embodiments" in the present application means that the specific features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0046] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0047] The term "and / or" in the present application is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0048] In the embodiments of the present application, the same reference numerals denote the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only for illustrative purposes and should not constitute any limitation to the present application.

[0049] The term "a plurality of" as used in the present application means two or more (including two).

[0050] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0051] It can be understood that the temperature environment inside the battery is affected by external conditions. The battery cells inside the battery need to operate within a certain temperature range. When the temperature inside the battery exceeds or is lower than this range, the stability and performance of the battery will be greatly affected. For example, when the weather is hot, the battery cells inside the battery need to be cooled to keep the temperature inside the battery within the required range. When the weather is cold, the battery cells inside the battery need to be heated to keep the temperature inside the battery still within the required range.

[0052] The heat exchange member can be used to circulate the heat exchange medium and perform heat exchange with the component to be heat-exchanged, such as the battery cell, so that the heat or cold of the heat exchange medium is transferred to the component to be heat-exchanged, realizing heat exchange with the component to be heat-exchanged, heating or cooling the component to be heat-exchanged, realizing temperature adjustment, and enabling the component to be heat-exchanged to be within a more suitable temperature range.

[0053] The structural strength of the heat exchange member has an important impact on its service life and the risk of airtight failure. For example, in some related technologies, the heat exchange member is usually a tube body with a single lumen. The structural strength of the heat exchange member is weak, and the pressure-bearing capacity is insufficient. It is easy to have problems such as structural deformation and damage, airtight failure, reduction of heat exchange capacity or leakage of the heat exchange medium under external forces such as the weight of the battery module, the expansion force of the battery cell, and external impact force. Therefore, how to improve the structural strength of the heat exchange member has become the research focus in this field.

[0054] Based on this, the present application proposes a battery, which includes a box body, a heat exchange member, and battery cells. An accommodation space is formed inside the box body; the battery cells are arranged in the accommodation space; the heat exchange member includes a heat exchange section, and the heat exchange section is arranged on one side of the wall surface of the battery cell for heat exchange with the battery cell. A cavity is arranged in the heat exchange section, and a plurality of cavities are arranged along a first direction, and the first direction is perpendicular to the wall surface.

[0055] In the battery with the above structure, a plurality of cavities in the heat exchange section are arranged along the first direction, and the first direction is perpendicular to the wall surface of the battery cell. That is to say, the heat exchange section has a plurality of tube cavities, and one tube cavity is one cavity. Compared with the heat exchange section with a single tube cavity, when the cross-sectional areas are close, the heat exchange section with a plurality of tube cavities has high structural strength, and is less likely to deform or collapse under external forces during use, and has a lower risk of airtight failure, which is beneficial to improving the overall structural strength and service life of the heat exchange member; at the same time, usually when the box wall is subjected to external forces, the direction of the external force is usually perpendicular to the box wall or has a component force perpendicular to the box wall. In the present application, a plurality of cavities are arranged along the first direction. When the outer cavity is subjected to external force impact, it can also play a buffering role, so that the force transmitted to the inner cavity and the battery cell is gradually weakened, playing a role in protecting the inner cavity and the battery cell, reducing the possibility of heat exchange failure of the heat exchange member, and improving the use reliability of the battery cell. In addition, the plurality of cavities are independent of each other, and different heat exchange media can be introduced into the plurality of cavities or the flow parameters of the heat exchange media can be controlled, so as to be beneficial to achieving the purpose of more refined control of the temperature of the battery and achieving a better cooling effect.

[0056] The battery disclosed in the embodiments of the present application can be used in an electrical device using the battery as a power source or various energy storage systems using the battery as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric aircraft toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0057] For the convenience of description in the following embodiments, a vehicle, i.e., an electrical device 1000 in an embodiment of the present application, is taken as an example for illustration.

[0058] Refer to Figure 1 , Figure 1Schematic diagram of a vehicle provided by 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 disposed inside the vehicle. The battery 100 can be disposed at the bottom, the head or the tail of the vehicle. The battery 100 can be used for power supply of the vehicle. For example, the battery 100 can be used as the operating power source of 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 supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle.

[0059] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle, but also be used as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0060] Refer to Figure 2 , Figure 2 Explosion diagram of the battery 100 according to some embodiments of the present application. The battery 100 includes a box body 10 and battery cells 20. The box body 10 has an accommodating space, and the battery cells 20 are accommodated in the accommodating space of the box body 10.

[0061] Among them, the box body 10 is used to provide an accommodating space for the battery cells 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first part 101 and a second part 102. The first part 101 and the second part 102 are covered with each other, and the first part 101 and the second part 102 jointly define an accommodating space for accommodating the battery cells 20. The second part 102 can be a hollow structure with one end open, and the first part 101 can be a plate-like structure. The first part 101 covers the open side of the second part 102 so that the first part 101 and the second part 102 jointly define an accommodating space; the first part 101 and the second part 102 can also both be hollow structures with one side open, and the open side of the first part 101 covers the open side of the second part 102. Of course, the box body 10 formed by the first part 101 and the second part 102 can be in various shapes, such as a cylinder, a cuboid, etc.

[0062] In the battery 100, there may be multiple battery cells 20. The multiple battery cells 20 can be connected in series, parallel, or in a combined series-parallel connection. A combined series-parallel connection means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, parallel, or in a combined series-parallel connection and then the whole formed by the multiple battery cells 20 is accommodated in the box body 10. Of course, the battery 100 can also be such that multiple battery cells 20 are first connected in series, parallel, or in a combined series-parallel connection to form a battery module, and then multiple battery modules are connected in series, parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box body 10. The battery 100 can also include other structures. For example, the battery 100 can also include a busbar component for realizing the electrical connection among the multiple battery cells 20.

[0063] Among them, each battery cell 20 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 20 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0064] Next, with reference to the accompanying drawings, the battery 100 of the embodiments of the present application will be described.

[0065] Please refer to Figures 3 to 7 as shown in Figure 3 the bottom view of the box body 10 of the battery 100 provided in some embodiments of the present application; Figure 4 is Figure 3 the sectional view taken along A-A in Figure 5 is Figure 4 the partial enlarged view of part B in Figure 6 the sectional view of the box body 10 of the battery 100 provided in some embodiments of the present application with the battery cell 20 provided; Figure 7 the top view of the box body 10 of the battery 100 provided in some embodiments of the present application. The battery 100 includes: a box body 10, a heat exchange member 104, and a battery cell 20.

[0066] An accommodation space is formed inside the box body 10; the battery cell 20 is arranged in the accommodation space; the heat exchange member 104 includes a heat exchange section 1041. The heat exchange section 1041 is arranged on one side of the wall surface of the battery cell 20 for heat exchange with the battery cell 20. A cavity 1042 is arranged inside the heat exchange section 1041, and a plurality of cavities 1042 are arranged along a first direction F1, and the first direction F1 is perpendicular to the wall surface.

[0067] Specifically, the box body 10 of the battery 100 has an accommodation space for accommodating the battery cell 20. During the operation of the battery cell 20, heat can be generated, or in a low-temperature environment, it is necessary to heat the battery cell 20 so that the battery cell 20 is within an appropriate temperature range. By providing the heat exchange member 104, the temperature of the battery cell 20 can be adjusted, the stability of the battery cell 20 can be improved, and the endurance of the battery 100 can be improved.

[0068] The heat exchange section 1041 may refer to a flow channel structure in the heat exchange member 104 that can allow a medium to flow and define the flow path of the medium. Among them, the heat exchange member 104 may include one or more heat exchange sections 1041. When there are multiple heat exchange sections 1041, the multiple heat exchange sections 1041 may be connected in sequence. The heat exchange section 1041 may extend along a straight line, an arc, or a combination of one or more of such shapes. For example, the multiple heat exchange sections 1041 may be linear, and any two adjacent heat exchange sections 1041 may be bent and connected; or, the multiple heat exchange sections 1041 are linear, and the heat exchange member 104 may further include a connecting section 1045, and any two adjacent heat exchange sections 1041 are connected by the connecting section 1045 (see Figure 3 and Figure 4 ). In the embodiments of the present application, the heat exchange section 1041 may be a tubular component, or the heat exchange member 104 is a component formed by laminating multiple plate members, and multiple heat exchange sections 1041 are formed inside the component.

[0069] In the present application, "the heat exchange section 1041 is disposed on one side of the wall surface of the battery cell 20" can be understood that the wall surface may refer to the outer shell surface of the battery cell 20. Among them, the battery cell 20 may include multiple wall surfaces, and the number of wall surfaces may depend on the shape of the battery cell 20. For example, when the battery cell 20 is a cuboid structure, the battery cell 20 may include six wall surfaces. In the embodiments of the present application, the heat exchange section 1041 may be disposed on one or more wall surfaces of the battery cell 20. Optionally, the heat exchange section 1041 may be parallel to the wall surface of the battery cell 20.

[0070] In the above technical solution, the cross-section of the cavity 1042 of the heat exchange section 1041 may be circular, elliptical, rectangular, or other shapes, and the outer contour of the cross-section of the heat exchange section 1041 may be rectangular, so that the heat exchange area between the heat exchange section 1041 and the wall surface of the battery cell 20 is relatively large. The material of the heat exchange section 1041 may be a material with excellent thermal conductivity, such as a metal material, specifically such as aluminum, copper, etc. Exemplarily, the heat exchange section 1041 may be an aluminum tube.

[0071] In the present application, the forming process of the heat exchange section 1041 is not limited. For example, it may be extruded and formed by an extrusion process, or may be formed by sheet metal bending, etc.

[0072] The heat exchange member 104 can be disposed inside the box body 10, that is, disposed in the accommodation space, so that the heat exchange section 1041 can be in contact with the wall surface of the battery cell 20 for heat exchange. The heat exchange member 104 can also be disposed outside the box body 10, so that the heat exchange section 1041 can exchange heat with the battery cell 20 through the box wall of the box body 10. In the battery 100 of the embodiment of the present application, the heat exchange member 104 can be disposed between the top surfaces of a plurality of battery cells 20 and the top wall of the box body 10 (in this example, the battery cells 20 can be inverted, that is, the electrode posts of the battery cells 20 are arranged downward); the heat exchange member 104 can also be disposed between the bottom surfaces of a plurality of battery cells 20 and the bottom wall 1031 of the box body 10; or, the heat exchange member 104 can also be disposed between the side surfaces of the battery cells 20 and the side walls of the box body 10.

[0073] The heat exchange member 104 can be attached to the box wall of the box body 10 to exchange heat with the box wall of the box body 10; or, the heat exchange member 104 can also indirectly exchange heat with the box wall of the box body 10 through a heat conducting member (such as heat conducting silicone grease or a metal plate with good heat conductivity, etc.).

[0074] A plurality of cavities 1042 are arranged along the first direction F1. Specifically, for example, reference can be made to Figure 5 and Figure 6 As shown, two cavities 1042 are arranged along the first direction F1. Or, three or four cavities 1042 can also be arranged along the first direction F1. In practice, it can be set according to requirements and the actual production capacity of the process.

[0075] A heat exchange medium can flow in the cavity 1042 to exchange heat with the surrounding wall of the cavity 102. The heat exchange medium in the cavity 1042 can be water, ethylene glycol / water mixture, R134a (tetrafluoroethane), R1234y (F2,3,3,3-tetrafluoropropene), liquid carbon dioxide (CO2), phase change material, etc.

[0076] Since the plurality of cavities 1042 of the heat exchange section 1041 are independent of each other, in the plurality of cavities 1042 of the heat exchange section 1041, only some of the cavities 1042 can have a heat exchange medium flowing through them, and some of the cavities 1042 do not have a heat exchange medium flowing through them; or, all of the plurality of cavities 1042 of the heat exchange section 1041 can have a heat exchange medium flowing through them. The types, flow directions, flow rates, etc. of the heat exchange media flowing in the plurality of cavities 1042 can be the same or different. Thus, by introducing different heat exchange media into the plurality of cavities 1042 or controlling the flow parameters of the heat exchange medium, the purpose of more refined control of the temperature of the battery can be achieved and a better cooling effect can be achieved.

[0077] For example, along the first direction F1, in the direction away from the battery cell 20, a plurality of cavities 1042 can be sequentially named as the first cavity, the second cavity, and so on. A heat transfer medium with relatively high thermal conductivity can be introduced into the first cavity close to the battery cell 20. Thus, the battery cell 20 can be quickly heat-exchanged through the heat transfer medium in the first cavity. And a heat transfer medium with relatively low thermal conductivity can be introduced into the second cavity, so that the second cavity can heat-exchange with the first cavity, reducing the probability of the heat transfer effect being reduced due to the relatively high temperature of the heat transfer medium in the first cavity. Of course, the heat transfer effect of the entire heat transfer section 1041 can be further adjusted by controlling the flow rates of the heat transfer media in the first cavity and the second cavity.

[0078] In the embodiment of the present application, two adjacent cavities 1042 among the plurality of cavities 1042 arranged along the first direction F1 are connected to each other. There are a plurality of cavities 1042 of the heat transfer section 1041 arranged along the first direction F1, and the first direction F1 is perpendicular to the box wall. That is to say, the heat transfer section 1041 has a plurality of lumen, and one lumen is a cavity 1042. Compared with the heat transfer section with a single lumen, in the case of a similar cross-sectional area, the heat transfer section 1041 with a plurality of lumen has high structural strength and is less likely to deform or collapse when subjected to external forces during use.

[0079] At the same time, when the box wall of the box body 10 is subjected to external forces, the direction of the external force is usually perpendicular to the box wall or has a component force perpendicular to the box wall. In the present application, there are a plurality of cavities 1042 arranged along the first direction F1. When the cavity 1042 located on the outer side along the first direction F1 is subjected to external force impacts, it can also play a buffering role, so that the force transmitted to the inner cavity 1042 and the battery cell 20 is gradually weakened, playing a role in protecting the inner cavity 1042 and the battery cell 20.

[0080] In the battery 100 with the above structure, the cavity 1042 of the heat exchange section 1041 is provided with a plurality of along the first direction F1. The structure of the heat exchange section 1041 with a plurality of cavities 1042 has high structural strength, and is less likely to deform, collapse, etc. under external forces during use, with a lower risk of airtight failure, which is beneficial to improving the overall structural strength and service life of the heat exchange member 104. At the same time, in this application, the cavity 1042 is provided with a plurality of along the first direction F1. When the cavity 1042 located on the outside is subjected to an external impact, it can play a buffering role, so that the force transmitted to the inner cavity 1042 and the battery cell 20 gradually weakens, playing a role in protecting the inner cavity 1042 and the battery cell 20, reducing the possibility of heat exchange failure of the heat exchange member 104, and improving the use reliability of the battery cell 20. In addition, the plurality of cavities 1042 are independent of each other, and different heat exchange media can be introduced into the plurality of cavities 1042 or the flow parameters of the heat exchange media in different cavities 1042 can be controlled, which is beneficial to achieving a more refined control of the temperature of the battery 100 and achieving a better cooling effect.

[0081] According to some embodiments of the present application, in the first direction F1, heat exchange media are provided in any two adjacent cavities 1042, and the heat exchange media in any two adjacent cavities 1042 are different.

[0082] For example, the heat exchange media in the cavity 1042 located on the inner side in the second direction F2 can adopt a heat exchange media with a large thermal conductivity coefficient to facilitate the rapid export of heat, and the heat exchange media in the cavity 1042 located on the outer side in the second direction F2 can adopt a heat exchange media with a small latent heat of vaporization to facilitate the rapid absorption of heat, so as to achieve more efficient heat exchange in a smaller space.

[0083] Different heat exchange media have different thermophysical properties, such as boiling point, latent heat of vaporization, thermal conductivity coefficient, etc. Utilizing these characteristics, more efficient heat transfer can be achieved in a smaller space, optimizing the heat exchange process for a specific temperature range, thereby overall improving the heat exchange efficiency of the heat exchange member 104.

[0084] According to some embodiments of the present application, in the first direction F1, heat exchange media are provided in any two adjacent cavities 1042, and the heat exchange media in any two adjacent cavities 1042 are the same.

[0085] For example, the flow velocities of the heat exchange media in two adjacent cavities 1042 can be different, or the flow velocities of the heat exchange media in two adjacent cavities 1042 can be the same. The flow directions of the heat exchange media in two adjacent cavities 1042 can be different, or the flow directions of the heat exchange media in two adjacent cavities 1042 can also be the same.

[0086] When one of the cavities 1042 is blocked and leaking, the remaining cavities 1042 can still perform the heat exchange function normally. Compared with the single-cavity design, the heat exchange element 104 of the present application has higher redundancy and better reliability. For the single-cavity design, the temperature of the heat exchange medium in the cavity is already high near the water outlet of the heat exchange element, and the cooling effect on the battery cell 20 is poor. The heat exchange section 1041 in the present application has multiple separate cavities 1042, and the flow directions of the heat exchange medium in two adjacent cavities 1042 in the first direction F1 can be opposite. This is conducive to making the temperature of the heat exchange medium in various parts of the heat exchange element 104 more uniform, which is conducive to uniformizing the heat exchange capacity of various parts of the heat exchange element 104 and reducing the temperature difference in various parts of the battery 100.

[0087] According to some embodiments of the present application, in the first direction F1 , a heat exchange medium is disposed in the cavity 1042 close to the battery cell 20 , and the cavity 1042 away from the battery cell 20 is a hollow cavity or is provided with a buffer.

[0088] The cavity 1042 far from the battery cell 20 is a hollow cavity or is provided with a buffer. For example, the cavity 1042 far from the battery cell 20 is filled with air, or filled with sponge, plastic, rubber, etc. as a buffer. When the cavity 1042 far from the battery cell 20 is damaged and the heat exchange element 104 is impacted, the buffer can still resist the impact to reduce the possibility of damage to the cavity 1042 closest to the battery cell 20 due to a large impact.

[0089] In other words, the cavity 1042 close to the battery cell 20 exchanges heat with the battery cell 20, and the cavity 1042 far from the battery cell 20 plays a protective role, so as to enhance the impact resistance of the heat exchange component 104, and reduce the possibility of leakage of the heat exchange medium in the cavity 1042 close to the battery cell 20. Even if the cavity 1042 far from the battery cell 20 is damaged, the heat exchange component 104 can still realize the normal heat exchange function and achieve the effect of preventing bottoming.

[0090] According to some embodiments of the present application, reference Figures 4 to 6 , the heat exchanger 104 is arranged on the outside of the box 10. In this technical solution, on the one hand, the heat exchanger 104 is arranged on the outside of the box 10, which is conducive to saving the space inside the box 10, increasing the space occupied by the battery cell 20 in the accommodation space, and thus improving the energy density of the battery 100. On the other hand, the heat exchanger 104 is arranged on the outside of the box 10, which is also conducive to simplifying the assembly process of the battery 100, reducing the difficulty of assembling the battery 100, thereby helping to reduce costs, and the external placement of the heat exchanger 104 is also conducive to disassembly and replacement, and convenient for maintenance and repair of the heat exchanger 104.

[0091] According to some embodiments of the present application, referring to Figures 3 to 6As shown, the battery 100 further includes a protective member 105, which is attached to the box wall and covers the heat exchange member 104.

[0092] For example, the protective member 105 can be a buffer material layer; or, the protective member 105 can be a heat-insulating material layer; or, the protective member 105 can be a buffer and heat-insulating material layer; or, the protective member 105 is a rigid plate member; or, the protective member 105 can be a coating.

[0093] That is to say, when the box body 10 is impacted by an external force, the protective member 105 will be impacted first. The protective member 105 can play a role in buffering or resisting the impact, reducing the possibility that the heat exchange member 104 or the box wall is directly impacted greatly.

[0094] According to some embodiments of the present application, the protective member 105 is made of a buffer material and / or a heat-insulating material.

[0095] For example, the material of the protective member 105 can be, but is not limited to, TPU (polyurethane), filled foaming materials, etc.

[0096] Using a buffer material member as the protective member 105 can buffer and absorb part of the external force, enhancing the ability of the box body 10 to resist external damage. Using a heat-insulating material member as the protective member 105 can reduce the heat loss of the heat exchange member 104 during operation, improving the utilization efficiency of the heat of the heat exchange medium.

[0097] In some embodiments of the present application, referring to Figure 8 , the heat exchange member 104 is arranged on the outer side of the box body 10. The battery 100 can further include a guard plate 30, which is connected to the box wall of the box body 10 and defines a protective cavity with the box wall, and the heat exchange member 104 is arranged in the protective cavity.

[0098] The guard plate 30 can refer to a plate member that can play a protective role. The guard plate 30 can include, but is not limited to, metal plate members, plastic plate members, and other composite material plate members, etc. In this embodiment, the box wall of the box body 10 can refer to the bottom wall of the box body 10. At this time, the guard plate 30 can be arranged at the bottom of the box body 10; or, the box wall of the box body 10 can refer to the side wall of the box body 10. At this time, the guard plate 30 can be arranged on the side of the box body 10. Optionally, a protective member 105 can be arranged in the protective cavity or not.

[0099] In the above technical solution, the guard plate 30 can play a role in protecting the heat exchange member 104, reducing the probability of damage to the heat exchange member 104 when the battery 100 is bumped, improving the reliability of the heat exchange member 104, and further improving the reliability of the battery 100. Especially when the guard plate 30 is arranged on the bottom wall of the box body 10, the guard plate 30 can reduce the probability of damage to the heat exchange member 104 when the battery 100 is bumped at the bottom, effectively improving the reliability of the heat exchange member 104.

[0100] In some embodiments of the present application, the heat exchanger 104 is disposed close to the bottom wall 1031 of the box body 10, or the heat exchanger 104 is disposed close to the side wall of the box body 10.

[0101] Optionally, referring to Figure 4 , Figure 5 and Figure 8 , the heat exchanger 104 can be disposed close to the bottom wall 1031 of the box body 10. It can be understood that the heat exchanger 104 can be disposed adjacent to the bottom wall 1031 of the box body 10, that is, the heat exchanger 104 and the bottom wall 1031 may not be in contact, and there is a gap between the two; the heat exchanger 104 can also be disposed in contact with the bottom wall 1031 of the box body 10. And in this embodiment, the heat exchanger 104 can refer to being disposed outside the box body 10 or inside the box body 10.

[0102] In the above embodiment, heat exchange is performed between the heat exchange section 1041 and the bottom wall 1031 of the box body 10 located below. The box body 10 can be integrally formed by stamping, and can refer to Figures 3 to 7 as shown. The box body 10 can include a bottom wall 1031 and a surrounding wall 1032. For example, the box body 10 can be made of sheet metal and stamped into a basin shape to include the bottom wall 1031 and the surrounding wall 1032. Since the bottom wall 1031 and the surrounding wall 1032 of the box body 10 are integrally formed by stamping, there is no need to consider the sealing problem at the connection between the bottom wall 1031 and the surrounding wall 1032, and the sealing effect can be ensured, so that it is possible to prevent muddy water from seeping into the box body 10 through the connection between the bottom wall 1031 and the surrounding wall 1032 and affecting the battery cells 20, and the reliability of the battery 100 is improved. Moreover, the integrally stamped box body 10 does not require splicing, which can improve production efficiency.

[0103] In the above technical solution, when the heat exchange section 1041 is damaged and the heat exchange medium in the heat exchange section 1041 leaks, the heat exchange medium is not easily in contact with the battery cells 20 in the box body 10, and the accidental risks such as short circuit and short connection of the battery cells 20 can be reduced. In addition, in the embodiment where the protective member 105 is disposed on the bottom wall 1031 of the box body 10, during the use of the battery 100, usually the bottom wall 1031 of the box body 10 is more likely to be impacted. Disposing the protective member 105 on the bottom wall 1031 is beneficial to better improving the impact resistance of the box body 10.

[0104] Optionally, the heat exchanger 104 can also be disposed close to the side wall of the box body 10. It can be understood that the heat exchanger 104 can be disposed adjacent to the side wall of the box body 10, that is, the heat exchanger 104 and the side wall of the box body 10 may not be in contact, and there is a gap between the two; the heat exchanger 104 can also be disposed in contact with the side wall of the box body 10. And in this embodiment, the heat exchanger 104 can refer to being disposed outside the box body 10 or inside the box body 10.

[0105] In the above technical solution, since the area of the bottom wall 1031 of the box body 10 is relatively large, arranging the heat exchange member 104 close to the bottom wall 1031 of the box body 10 is beneficial to increasing the area of the heat exchange member 104, thereby being beneficial to improving the heat exchange efficiency of the battery 100. Moreover, the bottom wall 1031 of the box body 10 is generally far from the electrical device, so there is sufficient space to arrange the heat exchange member 104, which is beneficial to the maintenance and replacement of the heat exchange member 104. By arranging the heat exchange member 104 close to the side wall of the box body 10, the heat exchange member 104 can be far from the bottom of the electrical device, thereby reducing the probability of damage to the heat exchange member 104 due to bottom collision, being beneficial to improving the reliability of the heat exchange member 104, and thus improving the reliability of the battery 100.

[0106] In some embodiments of the present application, referring to Figure 8 , a groove 1033 is provided on one side of the box wall of the box body 10 close to the heat exchange section 1041, and at least part of the heat exchange section 1041 is arranged in the groove 1033.

[0107] The groove 1033 may refer to a recessed area formed on the box wall, which can play a role in accommodating the heat exchange section 1041. Among them, the depth of the groove 1033 may be less than the thickness of the heat exchange section 1041, so that the heat exchange section 1041 can be partially embedded in the groove 1033; the depth of the groove 1033 may also be greater than or equal to the thickness of the heat exchange section 1041, so that the heat exchange section 1041 can be entirely located in the groove 1033. Optionally, the groove 1033 may be a groove opened on the box wall or a groove formed by stamping the box wall.

[0108] In the above technical solution, by arranging the heat exchange section 1041 in the groove 1033 of the box wall, it is beneficial to improve the integration degree of the heat exchange section 1041 and the box body 10, thereby being beneficial to reducing the overall volume of the battery 100 and improving the volume energy density of the battery 100. Moreover, by arranging the heat exchange section 1041 in the groove 1033 of the box wall, it is also beneficial to improve the connection reliability of the heat exchange section 1041 on the box wall, reducing the probability of the heat exchange member 104 detaching from the box body 10, and thus being beneficial to improving the working reliability of the heat exchange member 104.

[0109] According to some embodiments of the present application, referring to Figure 5 and Figure 6 , a plurality of cavities 1042 arranged along the first direction F1 form a cavity group 1043, and a plurality of cavity groups 1043 are arranged along the second direction F2, and the second direction F2 is parallel to the wall surface.

[0110] Among the multiple cavity groups 1043 arranged along the second direction F2, some adjacent cavity groups 1043 may be connected to each other, and some adjacent cavity groups 1043 may be arranged at intervals; alternatively, all the multiple cavity groups 1043 arranged along the second direction F2 may be arranged at intervals; alternatively, adjacent cavity groups 1043 among the multiple cavity groups 1043 arranged along the second direction F2 may be connected to each other.

[0111] Among them, for the same heat exchange section 1041, multiple cavity groups 1043 are arranged along the second direction F2. In this way, it is beneficial to further improve the structural strength of the heat exchange section 1041, and it is less likely to deform, collapse, etc. when subjected to external forces during use.

[0112] According to some embodiments of the present application, among any two adjacent cavity groups 1043, the heat exchange media of two adjacent cavities 1042 in the second direction F2 are different.

[0113] For example, for the cavity group 1043 corresponding to the area with a lower temperature of the box wall, the latent heat of vaporization of the heat exchange medium in the cavity group 1043 may be larger, and for the cavity group 1043 corresponding to the area with a higher temperature of the box wall, the latent heat of vaporization of the heat exchange medium in the cavity 1042 may be smaller, so as to quickly transfer the heat out.

[0114] Thus, according to the temperature rise differences in different areas of the box wall, different heat exchange media can be introduced into the cavity groups 1043 at corresponding positions, so as to reduce the use cost of the heat exchange member 104, improve the use efficiency of the heat exchange medium, more accurately control the temperature of the battery 100, extend the life of the battery 100, and improve the use safety of the battery 100.

[0115] According to some embodiments of the present application, among any two adjacent cavity groups 1043, the heat exchange media of two adjacent cavities 1042 in the second direction F2 are the same.

[0116] In the embodiment where the heat exchange media of two adjacent cavities 1042 in the second direction F2 are the same, the flow rates of the heat exchange media of the two cavities 1042 may be the same or different. In the embodiment where the heat exchange media of two adjacent cavities 1042 in the second direction F2 are the same, the flow directions of the heat exchange media of the two cavities 1042 may be different or the same.

[0117] When one of the cavities 1042 is blocked or leaks, the remaining cavities 1042 can still achieve the heat exchange function normally. Compared with the single-cavity design, the heat exchanger 104 of the present application has a higher redundancy and better reliability. For the single-cavity design, at the position near the water outlet of the heat exchanger, the temperature of the heat exchange medium in the cavity is already relatively high, and the cooling effect on the battery cell is poor. The heat exchange section 1041 in the present application has multiple separate cavities 1042, and the flow directions of the heat exchange media in two adjacent cavities 1042 in the second direction F2 can be opposite. In this way, it is beneficial to evenly distribute the heat exchange capacity of the heat exchanger 104 and reduce the temperature difference at various parts of the battery 100.

[0118] For example, the flow rates of two adjacent cavities 1042 in the second direction F2 can be different. For example, for the cavity 1042 corresponding to the area with small heat dissipation, the flow rate of the heat exchange medium in the cavity 1042 can be slower, and for the cavity 1042 corresponding to the area with large heat dissipation, the flow rate of the heat exchange medium in the cavity 1042 can be faster, so as to achieve differential heat exchange and improve the energy utilization rate of the heat exchange medium.

[0119] According to some embodiments of the present application, reference may be made to Figure 5 and Figure 6 , the heat exchange section 1041 may include a plurality of pipe bodies 1044, and each pipe body 1044 forms a cavity 1042 inside, and the plurality of pipe bodies 1044 are connected.

[0120] Each pipe body 1044 may include only one pipe cavity, and one pipe cavity is a cavity 1042, or each pipe body 1044 may include a plurality of pipe cavities, and the plurality of pipe cavities correspond to a plurality of cavities 1042. The plurality of pipe bodies 1044 are connected. For example, the plurality of pipe bodies 1044 may be connected by gluing; or, the plurality of pipe bodies 1044 may be connected by fasteners such as bolts or a fixing ring surrounding the outermost side of the plurality of pipe bodies 1044; or, the plurality of pipe bodies 1044 may also be connected by welding or riveting, etc.

[0121] The heat exchange section 1041 is obtained by connecting a plurality of pipe bodies 1044 side by side with each other. In this way, the production difficulty of the heat exchange section 1041 is low, the manufacturability is better, and the use cost is lower.

[0122] According to some embodiments of the present application, the heat exchange section 1041 is tubular, the heat exchange section 1041 is an integrally formed part, and a plurality of cavities 1042 are formed inside.

[0123] That is to say, multiple cavities 1042 are formed in one step. In this way, the tube walls can be shared between adjacent cavities 1042, which is beneficial to reducing the size of the heat exchange section 1041. Moreover, there is no air gap between adjacent cavities 1042, so the thermal conduction resistance of the heat exchange section 1041 is smaller, the heat conduction effect is better, and the heat exchange efficiency between adjacent cavities 1042 is higher. At the same time, the entire heat exchange section 1041 is integrally formed without seams or welding points, so the possibility of leakage at the joint can be reduced, and the sealing performance and reliability of the heat exchange section 1041 are improved.

[0124] According to some embodiments of the present application, reference may be made to Figure 5 and Figure 6 , the heat exchange member 104 is disposed in a fitting manner on the box wall of the box body 10.

[0125] Specifically, the surface of the box wall close to the heat exchange member 104 may be a flat surface. Correspondingly, the surface of the heat exchange member 104 close to the box wall may also be a flat surface. Thus, the heat exchange member 104 and the box wall of the box body 10 are in flat surface contact, and there is a large heat exchange area between the heat exchange member 104 and the box body 10, which is beneficial to improving the heat exchange efficiency. The surface of the box wall close to the heat exchange member 104 may also be a non-flat surface, such as a corrugated surface or a curved surface. Correspondingly, the surface of the heat exchange member 104 close to the box wall may also be a non-flat surface. Thus, the heat exchange member 104 and the box wall of the box body 10 are also in surface-to-surface contact and can also have a large heat exchange area.

[0126] In the above technical solution, the fitting of the heat exchange member 104 and the box wall reduces the gap between the heat exchange member 104 and the box wall, effectively reduces the thermal resistance, makes the heat transfer more direct and rapid, and thus improves the overall heat exchange efficiency. Moreover, the contact area between the box wall and the heat exchange member 104 is larger, which is beneficial to achieving more efficient and rapid heat exchange.

[0127] According to some embodiments of the present application, reference may be made to Figure 3 and Figure 4 , there are multiple heat exchange sections 1041. Some of the multiple heat exchange sections 1041 are spaced apart along the second direction F2 and are sequentially connected. Each heat exchange section 1041 extends along the third direction F3, the third direction F3 is perpendicular to the second direction F2, and the third direction F3 and the second direction F2 are parallel to the wall surface.

[0128] For example, reference may be made to Figure 3 and Figure 4 , the heat exchange sections 1041 spaced apart along the second direction F2 may be sequentially connected through the connection section 1045. The connection section 1045 may be connected to the heat exchange section 1041 through a connection joint. Alternatively, the heat exchange section 1041 may also be integrally formed with the connection section 1045.

[0129] The heat exchange sections 1041 are connected in sequence. For example, there are multiple heat exchange sections 1041 arranged at intervals along the second direction F2. Along the direction from one side to the other side of the second direction F2, the sequentially arranged heat exchange sections 1041 are respectively the first heat exchange section 1041, the second heat exchange section 1041, the third heat exchange section 1041,..., the Nth heat exchange section 1041. Among them, the first heat exchange section 1041 is directly connected to the second heat exchange section 1041 through the connection section 1045, and the second heat exchange section 1041 is directly connected to the third heat exchange section 1041 through the connection section 1045, but the third heat exchange section 1041 is not directly connected to the first heat exchange section 1041, and so on.

[0130] Each heat exchange section 1041 extends along the third direction F3. Here, the extending direction of the heat exchange section 1041 can be parallel to the third direction F3, or part or all of the extending direction of the heat exchange section 1041 can have a certain angle with the third direction F3. For example, the angle between the third direction F3 and the extending direction of the heat exchange section 1041 is 10°, 20°, 30°, 40°, etc.

[0131] In the above technical solution, the arrangement of the heat exchange sections 1041 has a good correspondence with the battery cells 20 in the battery box 10 of the battery 100, which can enable as many battery cells 20 as possible to obtain a good heat dissipation effect.

[0132] According to some embodiments of the present application, the battery cells 20 are arranged in multiple rows, and each row of battery cells 20 is arranged in multiple numbers, and each row of battery cells 20 corresponds to at least one heat exchange section 1041.

[0133] For example, along the second direction F2, the battery cells 20 are arranged in multiple rows, and each row of battery cells 20 is arranged in multiple numbers along the third direction F3. Or, along the third direction F3, the battery cells 20 are arranged in multiple rows, and each row of battery cells 20 is arranged in multiple numbers along the second direction F2.

[0134] Each row of battery cells 20 corresponds to at least one heat exchange section 1041. For example, each row of battery cells 20 corresponds to only one heat exchange section 1041, and the cavity 1042 of the heat exchange section 1041 extends along the arrangement direction of the battery cells 20 in each row of battery cells 20. In this way, the structure of the heat exchange member 104 is simple and convenient for forming and processing. Or, each row of battery cells 20 corresponds to multiple heat exchange sections 1041. In this way, the heat exchange area between each row of battery cells 20 and the heat exchange member 104 is larger, which is beneficial to faster heat dissipation. In some other embodiments, each battery cell 20 in each row of battery cells 20 can correspond to one heat exchange section 1041, and the multiple heat exchange sections 1041 corresponding to one row of battery cells 20 can be arranged at intervals along the arrangement direction of the battery cells 20 in each row of battery cells 20 and connected through the connection section 1045.

[0135] As described above, each row of battery cells 20 corresponds to at least one heat exchange section 1041. In this way, it is beneficial to improve the heat exchange efficiency between the heat exchange member 104 and the battery cells 20.

[0136] According to some embodiments of the present application, the heat exchange section 1041 is arranged close to the edge of the battery cell 20.

[0137] For example, the heat exchange section 1041 is arranged corresponding to the edge in the width direction of the battery cell 20, or the heat exchange section 1041 is arranged corresponding to the edge in the length direction of the battery cell 20. The heat exchange section 1041 is directly opposite to the edge of the battery cell 20, or the heat exchange section 1041 is arranged corresponding to the side of the edge of the battery cell 20 close to the middle of the battery cell 20, or the heat exchange section 1041 is arranged corresponding to the side of the edge of the battery cell 20 far from the middle of the battery cell 20.

[0138] It should be noted that the edge of the battery cell 20 is usually the junction position of the side walls of the housings of two battery cells 20. The structural strength at this position is relatively high, and it is not easy to deform when subjected to external force impact. By arranging the heat exchange section 1041 at a position close to the edge of the battery cell 20, the heat exchange section 1041 is not easy to deform.

[0139] According to some embodiments of the present application, reference can be made to Figure 6 As shown, the heat exchange section 1041 is arranged centrally with respect to the battery cell 20. That is to say, the heat exchange section 1041 is arranged corresponding to the middle of the battery cell 20. Here, it can be that some of the cavities 1042 are arranged centrally with respect to the battery cell 20, or the entire heat exchange section 1041 is arranged centrally with respect to the battery cell 20.

[0140] It should be noted that the heat generated by the battery cell 20 during use is mainly concentrated in the middle of the battery cell 20. By arranging the heat exchange section 1041 corresponding to the middle of the battery cell 20, the heat transfer path can be effectively shortened. The heat exchange section 1041 can directly contact the core position where the heat is generated, which helps to more quickly and evenly dissipate the heat, reduce the local overheating phenomenon, improve the thermal management efficiency, and at the same time can also more quickly sense and respond to the temperature change of the battery cell 20, and timely adjust the cooling or heating. Especially in the high-power output or fast-charging scenario, it can quickly remove the excess heat and reduce the risk of thermal runaway.

[0141] According to some embodiments of the present application, heat exchange sections 1041 are respectively arranged close to the edge of the battery cell 20 and corresponding to the middle of the battery cell 20. In this way, the heat exchange area between the battery cell 20 and the heat exchange member 104 is larger, which is beneficial to faster and more efficient heat dissipation.

[0142] Such as Figure 1As shown, the electrical device 1000 according to an embodiment of the present application includes a battery 100 according to an embodiment of the present application. The electrical device 1000 may be any of the aforementioned devices or systems that use the battery 100. By adopting the above battery 100, the battery 100 includes a box body 10, the box body 10 includes a heat exchange member 104, the heat exchange member 104 includes a heat exchange section 1041, and a plurality of cavities 1042 are arranged along a first direction F1 in the cavity 1042 of the heat exchange section 1041. The heat exchange section 1041 with a plurality of cavities 1042 has high structural strength and is less likely to deform or collapse under external forces during use, and the risk of airtight failure is lower, which is beneficial to improving the overall structural strength and service life of the heat exchange member 104. At the same time, in the present application, a plurality of cavities 1042 are arranged along the first direction F1. When the cavities 1042 located on the outside are subjected to external force impacts, they can play a buffering role, so that the force transmitted to the inner cavities 1042 and the battery cells 20 gradually weakens, protecting the inner cavities 1042 and the battery cells 20, reducing the possibility of heat exchange failure of the heat exchange member 104, and improving the use reliability of the battery cells 20. In addition, the plurality of cavities 1042 are independent of each other, and different heat exchange media can be introduced into the plurality of cavities 1042 or the flow parameters of the heat exchange media in different cavities 1042 can be controlled, so as to be beneficial to achieving a more refined control of the temperature of the battery 100 and achieving a better cooling effect.

[0143] The battery 100 and the vehicle according to a specific embodiment of the present application will be described below with reference to the accompanying drawings.

[0144] As Figures 1 - 2 shown, the vehicle includes a battery 100, and the battery 100 includes a box body 10 and battery cells 20 arranged in the box body 10. Please refer to Figures 3 to 7 , the battery 100 further includes a heat exchange member 104 and a protective member 105. The heat exchange member 104 is attached to the bottom wall 1031 of the box body 10 and can exchange heat with the bottom wall 1031 of the box body 10. The heat exchange member 104 includes a heat exchange section 1041, and a cavity 1042 is arranged in the heat exchange section 1041, and two cavities 1042 are arranged along a first direction F1, and the first direction F1 is perpendicular to the box wall. The two cavities 1042 arranged along the first direction F1 form a cavity group 1043, and two cavity groups 1043 are arranged along a second direction F2, and the second direction F2 is parallel to the box wall.

[0145] In the first direction F1, the heat exchange media of any two adjacent cavities 1042 are different. Among any two adjacent cavity groups 1043, the heat exchange media of two adjacent cavities 1042 in the second direction F2 are different.

[0146] There are multiple heat exchange sections 1041. Some of the multiple heat exchange sections 1041 are spaced apart along the second direction F2 and are connected in sequence. Each heat exchange section 1041 extends along the third direction F3, the third direction F3 is perpendicular to the second direction F2, and the third direction F3 and the second direction F2 are parallel to the box wall.

[0147] The battery cells 20 are arranged in multiple rows, and multiple battery cells 20 are arranged in each row. Each row of battery cells 20 corresponds to one heat exchange section 1041. The heat exchange section 1041 is centered relative to the battery cells 20.

[0148] The heat exchange section 1041 includes a plurality of pipe bodies 1044. A cavity 1042 is formed inside each pipe body 1044, and the multiple pipe bodies 1044 are connected. The protective member 105 is attached to the box wall and wraps the heat exchange member 104. The protective member 105 is made of a buffer heat-insulating material.

[0149] When an external force acts, the protective member 105 acts first, and the cavity 1042 located on the lower side plays a buffering role, and finally the force transmitted to the upper cavity 1042 and the battery cells 20 is gradually weakened. Centering the heat exchange section 1041 relative to the battery cells 20 can achieve a better cooling effect on the battery cells 20. The material of the heat exchange member 104 is not limited, and it can also be a coating or a mat. The number of heat exchange chambers of the heat exchange section 1041 can be infinitely stacked according to the actual process production capacity. The heat exchange section 1041 can be integrally extruded or formed by connecting multiple individual pipe fittings through a certain medium.

[0150] In the above embodiment, the heat exchange section 1041 includes a plurality of cavities 1042 arranged along the first direction F1 and a plurality of cavities 1042 arranged along the second direction F2. Compared with the heat exchange section with only a single pipe cavity, the heat exchange section 1041 of the present application can not only achieve the heat management function, but also has higher structural strength, is not easily deformed, and reduces the dependence of the heat exchange section 1041 on the strength of the box body 10; at the same time, through the design of the size of the heat exchange section 1041, the heat exchange section 1041 can have stronger resistance to external damage.

[0151] Since there are different cavities 1042 and they can be independently used as cooling channels, in order to make the temperature equalization effect of the entire battery 100 better, various heat exchange medium combinations can be made in different cavities 1042, so as to achieve the effect of matrix cooling. Different heat exchange media can be introduced into different cavities 1042, so as to realize more refined control of the temperature of the battery 100 and improve the heat exchange efficiency. The combined use of the multiple cavities 1042 of the heat exchange section 1041 can make the cooling effect reach the best.

[0152] In addition, a buffer and heat insulation structure (protective member 105) is added around the heat exchange section 1041 for protection, realizing functions such as heat insulation and protection against sand and stones. The introduction of the buffer and heat insulation material minimizes the heat loss of the heat exchange member 104 during normal use, and the heat exchange section 1041 has stronger resistance to external damage.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the specification of the present application.

[0154] In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that: include: A box body, wherein a receiving space is formed inside the box body; A battery cell, wherein the battery cell is arranged in the accommodation space; A heat exchange component includes a heat exchange section, which is arranged on one side of the wall of the battery cell and is used for heat exchange with the battery cell. A cavity is arranged in the heat exchange section, and multiple cavities are arranged along a first direction, and the first direction is perpendicular to the wall.

2. The battery according to claim 1, characterized in that In the first direction, heat exchange medium is arranged in any two adjacent cavities, and the heat exchange medium in any two adjacent cavities is different.

3. The battery according to claim 1, characterized in that In the first direction, heat exchange medium is arranged in any two adjacent cavities, and the heat exchange medium in any two adjacent cavities is the same.

4. The battery according to claim 1, characterized in that In the first direction, a heat exchange medium is arranged in the cavity close to the battery cell, and the cavity far from the battery cell is a hollow cavity or is provided with a buffer.

5. The battery according to claim 1, characterized in that The heat exchange element is arranged on the outside of the box body.

6. The battery according to claim 5, characterized in that The battery further comprises a protective member, which is arranged in close contact with the box wall of the box body and covers the heat exchange member.

7. The battery according to claim 6, characterized in that The protective element is made of buffer material and / or heat-insulating material.

8. The battery according to claim 1, characterized in that The heat exchange element is arranged close to the bottom wall of the box body, or the heat exchange element is arranged close to the side wall of the box body.

9. The battery according to claim 1, characterized in that The plurality of cavities arranged along the first direction constitute a cavity group, and the cavity group is arranged in plurality along a second direction, and the second direction is parallel to the wall surface.

10. The battery according to claim 9, characterized in that In any two adjacent cavity groups, the heat exchange media of the two adjacent cavities in the second direction are different.

11. The battery according to claim 9, characterized in that In any two adjacent cavity groups, the heat exchange medium of the two adjacent cavities in the second direction is the same.

12. The battery according to claim 1, characterized in that The heat exchange section includes a plurality of tubes, each of which has a cavity formed inside, and the plurality of tubes are connected.

13. The battery according to claim 1, characterized in that The heat exchange section is tubular and is an integrally formed part, and a plurality of cavities are formed inside.

14. The battery according to claim 1, characterized in that The heat exchange element is arranged in close contact with the box wall of the box body.

15. The battery according to claim 1, characterized in that There are multiple heat exchange sections, some of which are spaced apart along the second direction and connected in sequence, and each heat exchange section extends along a third direction, which is perpendicular to the second direction, and the third direction and the second direction are parallel to the wall.

16. The battery according to any one of claims 1 to 15, characterized in that: The battery cells are arranged in a plurality of rows, each row includes a plurality of battery cells, and each row of battery cells corresponds to at least one heat exchange section.

17. The battery according to claim 16, characterized in that The heat exchange section is arranged close to the edge of the battery cell.

18. The battery according to claim 16, characterized in that The heat exchange section is centrally arranged relative to the battery cell.

19. An electrical device, characterized in that: Comprising a battery as claimed in any one of claims 1 to 18.

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