Battery and electric device

Abstract

A battery (100) and an electric device (1000). The battery (100) comprises a case (10), a heat exchange member (104), and battery cells (20), and an accommodating space is formed in the case (10); the battery cells (20) are arranged in the accommodating space; the heat exchange member (104) comprises a heat exchange section (1041), the heat exchange section (1041) is arranged on one side of the wall surface of the battery cells (20) and is used for performing heat exchange with the battery cells (20), cavities (1042) are provided in the heat exchange section (1041), and there are multiple cavities (1042) arranged in a first direction, the first direction being perpendicular to the wall surface.

Description

Battery and electric device

[0001] Cross-reference to related applications

[0002] The present application is based on the Chinese patent application No. 202421486690.1, filed on June 26, 2024, and claims the priority of the Chinese patent application, the whole content of which is incorporated herein by reference. TECHNICAL FIELD

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

[0004] The battery box is generally provided with a heat exchange component, such as a heat exchange pipe, for adjusting the temperature of the battery monomer. Although the heat exchange pipe in the related art has a certain self-structural strength, it cannot withstand harsh system test conditions such as bottom ball and is prone to deformation after being impacted, affecting the cooling effect.

[0005] SUMMARY

[0006] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a battery, which has a better cooling effect on the battery monomer and a stronger resistance to external damage.

[0007] According to the battery of the present application, the battery comprises a box, a heat exchange component and a battery monomer, the box forms an accommodating space inside; the battery monomer is arranged in the accommodating space; the heat exchange component 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 heat exchange with the battery monomer, the heat exchange section is provided with cavities, the cavities are arranged in a plurality of ways along a first direction, and the first direction is perpendicular to the wall surface.

[0008] In the above technical solution, the heat exchange component comprises a heat exchange section, the cavities of the heat exchange section are arranged in a plurality of ways along a first direction, the heat exchange section with multiple cavities has high structural strength and is less prone to deformation, collapse and other problems when subjected to external force during use, and has lower risk of air tightness failure, which is conducive to improving the overall structural strength and service life of the heat exchange component; at the same time, in the present application, the cavities are arranged in a plurality of ways along the first direction, the cavities on the outer side can play a buffering role when subjected to external force impact, so as to gradually weaken the force transmitted to the cavities on the inner side and the battery monomer, thereby playing a role in protecting the cavities on the inner side and the battery monomer, reducing the possibility of heat exchange failure of the heat exchange component, and improving the use reliability of the battery monomer; in addition, the multiple cavities are independent of each other, different heat exchange media can be introduced into the multiple cavities or the flow parameters of the heat exchange media of different cavities can be controlled, thereby facilitating the purpose of more refined control of the temperature of the battery and achieving a better cooling effect.

[0009] In some embodiments of the present application, 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. In this technical solution, more efficient heat transfer can be achieved in a smaller space, the heat exchange process is optimized for a specific temperature range, thereby improving the heat exchange efficiency of the heat exchange element as a whole.

[0010] In some embodiments of the present application, 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. In this technical solution, more efficient heat transfer can be achieved in a smaller space, the heat exchange process is optimized for a specific temperature range, thereby improving the heat exchange efficiency of the heat exchange element as a whole.

[0011] In the above technical solution, when one of the cavities is blocked or leaks, the remaining cavities can still normally achieve heat exchange function. Compared with single-cavity design, the redundancy of the heat exchange element of the present application is higher, and the reliability is better.

[0012] In some embodiments of the present application, in the first direction, heat exchange medium is arranged in the cavity close to the battery monomer, and the cavity away from the battery monomer is empty or is provided with a buffer element.

[0013] In the above technical solution, the cavity close to the battery monomer exchanges heat with the box, and the cavity away from the battery monomer plays a protective role to enhance the impact resistance of the heat exchange element, which can reduce the possibility of leakage of the heat exchange medium in the cavity close to the battery monomer. Even if the cavity away from the battery monomer is damaged, the heat exchange element can still achieve normal heat exchange function, and the effect of preventing bottom knocking can be achieved.

[0014] In some embodiments of the present application, the heat exchange element is arranged on the outside of the box. In this technical solution, on the one hand, the heat exchange element is arranged on the outside of the box, which is beneficial to save the space inside the box, improve the space ratio of the battery monomer in the containing space, and further improve the energy density of the battery. On the other hand, the heat exchange element arranged on the outside of the box also helps to simplify the assembly process of the battery, reduce the assembly difficulty of the battery, thereby being beneficial to reduce the cost, and the external heat exchange element is also beneficial to disassembly and replacement, facilitating the maintenance and repair of the heat exchange element.

[0015] In some embodiments of the present application, the battery further comprises a protective element, which is arranged in close contact with the wall of the box and covers the heat exchange element. In this technical solution, when the box is impacted by external force, the protective element will be impacted first, and the protective element can play a role in buffering or resisting impact, reducing the possibility of the heat exchange element or the wall being impacted by a larger impact.

[0016] In some embodiments of the present application, the protective member is made of a cushioning material and / or a thermal insulation material. In this technical solution, the cushioning material member is used as the protective member, which can absorb part of external force and enhance the ability of the battery box to resist external damage. The thermal insulation material member is used as the protective member, which can reduce the heat loss of the heat exchange member during operation and improve the utilization efficiency of the heat exchange medium.

[0017] In some embodiments of the present application, the heat exchange member is arranged close to the bottom wall of the box, or the heat exchange member is arranged close to the side wall of the box. In this technical solution, since the area of the bottom wall of the box is relatively large, arranging the heat exchange member close to the bottom wall of the box is beneficial to increase the area of the heat exchange member, thereby improving the heat exchange efficiency of the battery. Moreover, the bottom wall of the box is generally far away from the electric device, thereby providing sufficient space for arranging the heat exchange member and facilitating the maintenance and replacement of the heat exchange member. By arranging the heat exchange member close to the side wall of the box, the heat exchange member can be far away from the bottom of the electric device, thereby reducing the probability of damage caused by the bottom of the heat exchange member being knocked, and improving the reliability of the heat exchange member, thereby improving the reliability of the battery.

[0018] In some embodiments of the present application, the plurality of cavities arranged in the first direction form a cavity group, and a plurality of cavity groups are 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, a plurality of cavity groups are arranged in the second direction, which is beneficial to further improve the structural strength of the heat exchange section and is less likely to deform, collapse, or have other problems when subjected to external force during use.

[0019] In some embodiments of the present application, the heat exchange medium of the two cavities adjacent in the second direction in any two adjacent cavity groups is different.

[0020] In the above technical solution, different heat exchange media can be introduced into the cavity groups at the corresponding positions according to the temperature difference of different regions of the box wall, 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, prolong the battery life, and improve the use safety of the battery.

[0021] In some embodiments of the present application, the heat exchange medium of the two cavities adjacent in the second direction in any two adjacent cavity groups is the same. In this technical solution, when one of the cavities is blocked or leaks, the remaining cavities can still normally realize the heat exchange function, and compared with the single-cavity design, the redundancy of the heat exchange member of the present application is higher and the reliability is better.

[0022] 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, so that the production difficulty of the heat exchange section is low, the manufacturability is better, and the use cost is lower.

[0023] In some embodiments of the present application, the heat exchange section is tubular, the heat exchange section is an integral molding, and a plurality of cavities are formed inside. In this technical solution, the tube wall can be shared between adjacent cavities, which is conducive to reducing the size of the heat exchange section, and there is no air gap between adjacent cavities, so the thermal resistance 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 joints 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 are improved.

[0024] In some embodiments of the present application, the heat exchange section is tubular, the heat exchange section is an integral molding, and a plurality of cavities are formed inside. In this technical solution, the tube wall can be shared between adjacent cavities, which is conducive to reducing the size of the heat exchange section, and there is no air gap between adjacent cavities, so the thermal resistance 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 joints 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 are improved.

[0025] In some embodiments of the present application, the heat exchange section is tubular, the heat exchange section is an integral molding, and a plurality of cavities are formed inside. In this technical solution, the tube wall can be shared between adjacent cavities, which is conducive to reducing the size of the heat exchange section, and there is no air gap between adjacent cavities, so the thermal resistance 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 joints 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 are improved.

[0026] In some embodiments of the present application, the battery includes battery monomers, the battery monomers are arranged in multiple rows, each row of battery monomers is arranged in multiple, and each row of battery monomers corresponds to at least one heat exchange section. In the above technical solution, each row of battery monomers corresponds to at least one heat exchange section, which is conducive to improving the heat exchange efficiency between the heat exchange section and the battery monomers.

[0027] In some embodiments of the present application, the heat exchange section is arranged close to the edge of the battery monomer.

[0028] In the above technical solution, the edge of the battery monomer is usually the intersection position of the side walls of the casings of two battery monomers, which has high structural strength and is not easy to deform under the impact of external force. By arranging the heat exchange section close to the edge of the battery monomer, the heat exchange section is not easy to deform.

[0029] In some embodiments of the present application, the heat exchange section is arranged centrally relative to the battery monomer.

[0030] In the technical solution, the heat generated by the battery cell during use is mainly concentrated in the middle part of the battery cell, the heat exchange section is arranged corresponding to the middle part of the battery cell, the heat transfer path can be effectively shortened, the heat exchange section can directly contact the core position of heat generation, which helps to more quickly and uniformly export heat, reduces local overheating phenomenon, improves heat management efficiency, and can also more quickly perceive and respond to temperature changes of the battery cell, timely adjusts cooling or heating, especially in high-power output or fast charging scenarios, can quickly remove excess heat and reduce the risk of thermal runaway.

[0031] In a second aspect, the embodiments of the present application also provide a power utilization device comprising the battery. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0033] FIG. 1 is a schematic view of a vehicle according to some embodiments of the present application;

[0034] FIG. 2 is an exploded view of a battery according to some embodiments of the present application;

[0035] FIG. 3 is a bottom view of a battery according to some embodiments of the present application;

[0036] FIG. 4 is a sectional view of FIG. 3 taken along line A-A;

[0037] FIG. 5 is a partial enlarged view of portion B in FIG. 4;

[0038] FIG. 6 is a schematic view of a partial structure of a battery according to some embodiments of the present application;

[0039] FIG. 7 is a top view of a battery according to some embodiments of the present application;

[0040] FIG. 8 is a schematic view of a partial structure of a battery according to some other embodiments of the present application.

[0041] REFERENCE SIGNS

[0042] power utilization device 1000; battery 100; box body 10; first part 101; second part 102; bottom wall 1031; surrounding wall 1032; groove 1033;

[0043] heat exchange member 104; heat exchange section 1041; cavity 1042; cavity group 1043; pipe body 1044;

[0044] protection member 105;

[0045] battery cell 20; guard plate 30; first direction F1; second direction F2; third direction F3. DETAILED DESCRIPTION

[0046] So that the objectives, technical solutions and advantages of the embodiments of the present application are more apparent, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationship.

[0048] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments.

[0049] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0051] In the embodiments of the present application, the same reference signs represent the same parts, and for the sake of brevity, detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are only exemplary and should not constitute any limitation on the present application.

[0052] As used herein, the term “plurality” means two or more (including two).

[0053] At present, from the development of market situation, the application of power battery is more and more extensive. Power battery is not only applied to energy storage power supply system such as hydroelectric, thermal, wind and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0054] It can be understood that the temperature environment in the battery is affected by external conditions, and the battery monomer in the battery needs to be in a certain temperature range when it is running. When the temperature in the battery is higher or lower than this range, the stability and performance of the battery will be greatly affected. For example, when the weather is hot, the battery monomer needs to be cooled to make the temperature in the battery within the required temperature range, and when the weather is cold, the battery monomer needs to be heated to make the temperature in the battery still within the required temperature range.

[0055] The heat exchange element can be used to circulate the heat exchange medium and exchange heat with the component to be exchanged, such as the battery monomer, so that the heat or cold of the heat exchange medium is transferred to the component to be exchanged, realizing heat exchange with the component to be exchanged, heating or cooling the component to be exchanged, realizing temperature regulation, and making the component to be exchanged be in a more suitable temperature range.

[0056] The structural strength of the heat exchange element has an important influence on its service life and air tightness failure risk. For example, in some related technologies, the heat exchange element is usually a single-lumen tube, and the structural strength of the heat exchange element is weak, and the pressure bearing capacity is insufficient. Under the action of external forces such as the weight of the battery assembly, the expansion force of the battery monomer, and the external impact force, the heat exchange element is prone to structural deformation and damage, air tightness failure, reduced heat exchange capacity, or leakage of heat exchange medium. Therefore, how to improve the structural strength of the heat exchange element has become a research focus in the field.

[0057] Based on this, the application provides a battery, which includes a box body, a heat exchange element and a battery monomer. The box body forms an accommodation space inside. The battery monomer is arranged in the accommodation space. The heat exchange element includes a heat exchange section, which is arranged on one side of the wall surface of the battery monomer and used for heat exchange with the battery monomer. The heat exchange section is provided with a cavity, and the cavity is provided with a plurality of cavities along a first direction. The first direction is perpendicular to the wall surface.

[0058] In the battery with the above structure, the cavities of the heat exchange section are arranged in multiple numbers along the first direction, which is perpendicular to the wall surface of the battery monomer, that is, the heat exchange section has multiple tube cavities, one tube cavity being one cavity. Compared with the heat exchange section with a single tube cavity, the heat exchange section with multiple tube cavities has high structural strength and is less likely to deform, collapse and the like when subjected to external force during use, and has lower risk of air tightness failure, which is conducive to improving the overall structural strength and service life of the heat exchange member. At the same time, generally, when the box wall is subjected to external force, the direction of the external force is usually perpendicular to the box wall or has a component perpendicular to the box wall. In the present application, the cavities are arranged in multiple numbers along the first direction, and the cavities located on the outer side can also play a buffering role when subjected to external force impact, so that the force transmitted to the cavities on the inner side and the battery monomer is gradually weakened, thereby protecting the cavities on the inner side and the battery monomer and reducing the possibility of heat exchange failure of the heat exchange member, and improving the use reliability of the battery monomer. In addition, the multiple cavities are independent of each other, and different heat exchange media or flow parameters of the heat exchange media can be introduced into the multiple cavities, thereby being conducive to achieving the purpose of more refined control of the temperature of the battery and achieving better cooling effect.

[0059] The battery disclosed in the embodiments of the present application can be used in a power consumption device using the battery as a power source or a variety of energy storage systems using the battery as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, and an electric aircraft toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0060] The following embodiments are described by taking a power consumption device 1000 of an embodiment of the present application as a vehicle for example for convenience of description.

[0061] Referring to FIG. 1, FIG. 1 is a schematic diagram of a vehicle provided by some embodiments of the present application. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The vehicle is internally provided with a battery 100, which can be arranged 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 an operating power source of the vehicle. The vehicle can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle during starting, navigation, and driving.

[0062] In some embodiments of the present application, the battery 100 can not only be used as an operating power source of the vehicle, but also be used as a driving power source of the vehicle, to replace or partially replace fuel or natural gas to provide driving power for the vehicle.

[0063] Referring to FIG. 2, which is an exploded view of a battery 100 according to some embodiments of the present application, the battery 100 includes a case 10 and battery cells 20, the case 10 having a receiving space, and the battery cells 20 being received in the receiving space of the case 10.

[0064] The case 10 is configured to provide a receiving space for the battery cells 20, and the case 10 can have various structures. In some embodiments, the case 10 can include a first part 101 and a second part 102, the first part 101 and the second part 102 being coupled to each other to define a receiving space for receiving the battery cells 20. The second part 102 can be a hollow structure with one open end, and the first part 101 can be a plate structure, the first part 101 being coupled to the open end of the second part 102 to define the receiving space together with the second part 102. Alternatively, the first part 101 and the second part 102 can both be hollow structures with one open end, the open end of the first part 101 being coupled to the open end of the second part 102. Of course, the case 10 defined by the first part 101 and the second part 102 can have various shapes, such as a cylinder, a cuboid, etc.

[0065] In the battery 100, the battery cells 20 can be multiple, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the multiple battery cells 20 are connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed manner, and the whole of the multiple battery cells 20 is received in the case 10. Alternatively, the multiple battery cells 20 can be connected in series, in parallel, or in a mixed manner to form battery modules, and the multiple battery modules are connected in series, in parallel, or in a mixed manner to form a whole, which is received in the case 10. The battery 100 can further include other structures, for example, the battery 100 can further include a busbar component for electrically connecting the multiple battery cells 20.

[0066] Each of the battery cells 20 can be a secondary battery or a primary battery, and can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cells 20 can have various shapes, such as a cylinder, a flat body, a cuboid, or other shapes.

[0067] The battery 100 according to some embodiments of the present application will be described below with reference to the accompanying drawings.

[0068] Please refer to FIG. 3 to FIG. 7, FIG. 3 is a bottom view of the box 10 of the battery 100 provided by some embodiments of the present application; FIG. 4 is a cross-sectional view of A-A in FIG. 3; FIG. 5 is a partial enlarged view of B in FIG. 4; FIG. 6 is a cross-sectional view of the box 10 of the battery 100 provided by some embodiments of the present application, which is provided with the battery monomer 20; FIG. 7 is a top view of the box 10 of the battery 100 provided by some embodiments of the present application. The battery 100 comprises the box 10, the heat exchange member 104 and the battery monomer 20.

[0069] The box 10 is internally formed with an accommodating space; the battery monomer 20 is arranged in the accommodating space; the heat exchange member 104 comprises a heat exchange section 1041, which is arranged at one side of the wall surface of the battery monomer 20 and is used for heat exchange with the battery monomer 20, and the heat exchange section 1041 is internally provided with cavities 1042, and the cavities 1042 are arranged in a plurality along a first direction F1, and the first direction F1 is perpendicular to the wall surface.

[0070] Specifically, the box 10 of the battery 100 has an accommodating space, which is used for accommodating the battery monomer 20. The battery monomer 20 can generate heat during operation, or the battery monomer 20 needs to be heated under a low-temperature environment to make the battery monomer 20 be in a suitable temperature range. The temperature adjustment of the battery monomer 20 can be realized by arranging the heat exchange member 104, the stability of the battery monomer 20 is improved, and the endurance of the battery 100 is improved.

[0071] The heat exchange section 1041 can refer to a flow channel structure in the heat exchange member 104, which can be used for medium flow and can define a medium flow path. The heat exchange member 104 can comprise one or more heat exchange sections 1041, and when the heat exchange section 1041 is a plurality, the plurality of heat exchange sections 1041 can be sequentially communicated. The heat exchange section 1041 can extend along one or a combination of several shapes such as a straight line, an arc, etc. For example, the plurality of heat exchange sections 1041 can be in a straight line type, and any two adjacent heat exchange sections 1041 are connected by bending; or the plurality of heat exchange sections 1041 are in a straight line type, and the heat exchange member 104 can further comprise a connecting section 1045, and any two adjacent heat exchange sections 1041 are connected by the connecting section 1045 (see FIG. 3 and FIG. 4). In the embodiments of the present application, the heat exchange section 1041 can be a tubular component, or the heat exchange member 104 is a component formed by laminating a plurality of plate members, and a plurality of heat exchange sections 1041 are formed in the component.

[0072] In the present application, the "heat exchange section 1041 is arranged at one side of the wall surface of the battery cell 20" can be understood as the wall surface can refer to the surface of the shell of the battery cell 20, wherein the battery cell 20 can include a plurality of wall surfaces, and the number of wall surfaces can depend on the shape of the battery cell 20, for example, when the battery cell 20 is a cuboid structure, the battery cell 20 can include six wall surfaces. In the embodiments of the present application, the heat exchange section 1041 can be arranged at one or more wall surfaces of the battery cell 20. Alternatively, the heat exchange section 1041 can be parallel to the wall surface of the battery cell 20.

[0073] In the above technical solution, the cross section of the cavity 1042 of the heat exchange section 1041 can be circular, elliptical, long strip-shaped or other shapes, and the outer contour of the cross section of the heat exchange section 1041 can be long strip-shaped, so that the heat exchange area between the heat exchange section 1041 and the wall surface of the battery cell 20 is larger. The material of the heat exchange section 1041 can be a material with excellent heat conductivity, such as a metal material, specifically, such as aluminum, copper, etc. For example, the heat exchange section 1041 can be an aluminum pipe.

[0074] In the present application, the forming process of the heat exchange section 1041 is not limited, for example, it can be extruded by an extrusion process, or it can be formed by bending sheet metal, etc.

[0075] The heat exchange member 104 can be arranged inside the box body 10, i.e. arranged 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 arranged 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 embodiments of the present application, the heat exchange member 104 can be arranged between the top surface of the plurality of battery cells 20 and the top wall of the box body 10 (in this example, the battery cell 20 can be inverted, i.e. the pole of the battery cell 20 is arranged downward); the heat exchange member 104 can also be arranged between the bottom surface of the plurality of battery cells 20 and the bottom wall 1031 of the box body 10; or alternatively, the heat exchange member 104 can also be arranged between the side surface of the battery cell 20 and the side wall of the box body 10.

[0076] The heat exchange member 104 can be in contact with the box wall of the box body 10 to exchange heat with the box wall of the box body 10; or alternatively, the heat exchange member 104 can also indirectly exchange heat with the box wall of the box body 10 through a heat conducting member (heat conducting silicone grease or a metal plate with good heat conductivity, etc.).

[0077] The cavity 1042 is arranged in a plurality along the first direction F1, specifically, for example, referring to FIGS. 5 and 6, the cavity 1042 is arranged in two along the first direction F1, or alternatively, the cavity 1042 can be arranged in three or four along the first direction F1, which can be arranged according to the demand and the actual process production capacity in practice.

[0078] The heat exchange medium can flow in the cavities 1042 to exchange heat with the surrounding wall of the cavity 102. The heat exchange medium in the cavities 1042 can be water, ethylene glycol / water mixture, R134a (tetrafluoroethane), R1234y (F2,3,3,3-tetrafluoropropene), liquid carbon dioxide (CO), phase change material, etc.

[0079] Since the cavities 1042 of the heat exchange section 1041 are independent of each other, only some of the cavities 1042 can flow with the heat exchange medium, and some of the cavities 1042 can not flow with the heat exchange medium; or all of the cavities 1042 of the heat exchange section 1041 flow with the heat exchange medium. The types, flow directions, flow rates, etc. of the heat exchange medium flowing in the cavities 1042 can be the same or different. In this way, by introducing different heat exchange media or controlling the flow parameters of the heat exchange medium into the cavities 1042, the purpose of more precise control of the temperature of the battery and better cooling effect can be achieved.

[0080] For example, along the first direction F1, in the direction away from the battery monomer 20, the cavities 1042 can be sequentially named as the first cavity, the second cavity, etc. The first cavity close to the battery monomer 20 can be introduced with a heat exchange medium with high thermal conductivity, so that the battery monomer 20 can be quickly heat exchanged by the heat exchange medium in the first cavity, and the second cavity can be introduced with a heat exchange medium with low thermal conductivity, so that the second cavity can heat exchange the first cavity, and reduce the probability of reducing the heat exchange effect due to the high temperature of the heat exchange medium in the first cavity. Of course, the flow rate of the heat exchange medium in the first cavity and the second cavity can also be controlled to further adjust the heat exchange effect of the entire heat exchange section 1041.

[0081] In the embodiment of the present application, the two adjacent cavities 1042 of the plurality of cavities 1042 arranged along the first direction F1 are connected to each other. The cavities 1042 of the heat exchange section 1041 are arranged in multiple along the first direction F1, and the first direction F1 is perpendicular to the box wall, that is, the heat exchange section 1041 has multiple pipe cavities, one pipe cavity is one cavity 1042. Compared with the single-pipe-cavity heat exchange section, the heat exchange section 1041 with multiple pipe cavities has high structural strength and is less likely to deform, collapse, etc. when subjected to external force during use.

[0082] Meanwhile, when the box wall of the box body 10 is subjected to an external force, the direction of the external force is usually perpendicular to the box wall or has a component perpendicular to the box wall. In the present application, the cavities 1042 are arranged in multiple numbers in the first direction F1, and the cavities 1042 located on the outer side in the first direction F1 can also play a buffering role when subjected to an external force impact, so that the force transmitted to the cavities 1042 on the inner side and the battery monomer 20 is gradually weakened, thereby playing a role in protecting the cavities 1042 on the inner side and the battery monomer 20.

[0083] In the battery 100 with the above structure, the cavities 1042 of the heat exchange section 1041 are arranged in multiple numbers in the first direction F1, and the heat exchange section 1041 with multiple cavities 1042 has high structural strength and is less likely to deform, collapse or have other problems when subjected to an external force during use, thereby reducing the risk of air tightness failure and improving the overall structural strength and service life of the heat exchange member 104. Meanwhile, in the present application, the cavities 1042 are arranged in multiple numbers in the first direction F1, and the cavities 1042 located on the outer side can play a buffering role when subjected to an external force impact, so that the force transmitted to the cavities 1042 on the inner side and the battery monomer 20 is gradually weakened, thereby playing a role in protecting the cavities 1042 on the inner side and the battery monomer 20, reducing the possibility of heat exchange failure of the heat exchange member 104, and improving the use reliability of the battery monomer 20. In addition, the multiple cavities 1042 are independent of each other, and different heat exchange media can be introduced into the multiple cavities 1042 or the flow parameters of the heat exchange media in different cavities 1042 can be controlled, thereby facilitating the purpose of more refined control of the temperature of the battery 100 and achieving better cooling effect.

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

[0085] For example, the heat exchange medium in the cavity 1042 located on the inner side in the second direction F2 can adopt a heat exchange medium with a large thermal conductivity, so as to quickly conduct heat out, and the heat exchange medium in the cavity 1042 located on the outer side in the second direction F2 can adopt a heat exchange medium with a small latent heat of vaporization, so as to quickly absorb heat, so as to achieve high-efficiency heat exchange in a small space.

[0086] Different heat exchange media have different thermal physical properties, such as boiling point, latent heat of vaporization, and thermal conductivity. By utilizing these characteristics, more efficient heat transfer can be achieved in a smaller space, the heat exchange process can be optimized for a specific temperature range, thereby improving the heat exchange efficiency of the heat exchange member 104 as a whole.

[0087] According to some embodiments of the present application, in the first direction F1, heat exchange medium is arranged in any two adjacent cavities 1042, and the heat exchange medium in any two adjacent cavities 1042 is the same.

[0088] For example, the flow speed of the heat exchange medium in the two adjacent cavities 1042 can be different, or the flow speed of the heat exchange medium in the two adjacent cavities 1042 can be the same. The flow direction of the heat exchange medium in the two adjacent cavities 1042 can be different, or the flow direction of the heat exchange medium in the two adjacent cavities 1042 can also be the same.

[0089] When one of the cavities 1042 is blocked or leaks, the remaining cavities 1042 can still normally achieve heat exchange function, and compared with a single-cavity design, the redundancy of the heat exchange member 104 of the present application is higher, and the reliability is better. For a single-cavity design, the temperature of the heat exchange medium in the cavity near the water outlet of the heat exchange member is already relatively high, and the cooling effect on the battery monomer 20 is poor. The heat exchange section 1041 in the present application has a plurality of separate cavities 1042, and the flow direction of the heat exchange medium in the two adjacent cavities 1042 in the first direction F1 can be opposite, which is conducive to making the temperature of the heat exchange medium at each part of the heat exchange member 104 more uniform, and is conducive to uniform heat exchange capacity at each part of the heat exchange member 104, and reducing the temperature difference of the battery 100 at each part.

[0090] According to some embodiments of the present application, in the first direction F1, the cavity 1042 close to the battery monomer 20 is arranged with heat exchange medium, and the cavity 1042 away from the battery monomer 20 is empty or arranged with a buffer member.

[0091] The cavity 1042 away from the battery monomer 20 is empty or arranged with a buffer member, for example, the cavity 1042 away from the battery monomer 20 is filled with air, or filled with sponge, plastic, rubber, etc. as a buffer member. When the cavity 1042 away from the battery monomer 20 is damaged and the heat exchange member 104 is impacted, the buffer member can still resist the impact to reduce the possibility of damage to the cavity 1042 closest to the battery monomer 20 due to a large impact.

[0092] In other words, the cavity 1042 close to the battery monomer 20 exchanges heat with the battery monomer 20, and the cavity 1042 away from the battery monomer 20 plays a protective role to enhance the impact resistance of the heat exchange member 104, and can reduce the possibility of leakage of the heat exchange medium in the cavity 1042 close to the battery monomer 20. Even if the cavity 1042 away from the battery monomer 20 is damaged, the heat exchange member 104 can still achieve normal heat exchange function, and can achieve the effect of preventing bottom knocking.

[0093] According to some embodiments of the present application, referring to FIGS. 4-6, the heat exchange member 104 is arranged outside the box body 10. In this technical solution, on the one hand, the heat exchange member 104 is arranged outside the box body 10, which is beneficial to save the space inside the box body 10, improve the space ratio of the battery monomer 20 in the containing space, and further improve the energy density of the battery 100. On the other hand, the heat exchange member 104 is arranged outside the box body 10, which is also helpful to simplify the assembly process of the battery 100, reduce the assembly difficulty of the battery 100, thereby being beneficial to reduce the cost, and the external heat exchange member 104 is also beneficial to disassembly and replacement, facilitating the maintenance and repair of the heat exchange member 104.

[0094] According to some embodiments of the present application, referring to FIGS. 3-6, the battery 100 further comprises a protective member 105, which is arranged in close contact with the box wall and covers the heat exchange member 104.

[0095] For example, the protective member 105 can be a layer of buffer material; or the protective member 105 can be a layer of thermal insulation material; or the protective member 105 can be a layer of buffer thermal insulation material, or the protective member 105 can be a hard plate member; or the protective member 105 can be a coating.

[0096] That is to say, when the box body 10 is subjected to external force impact, the protective member 105 will first be subjected to impact, and the protective member 105 can play a role in buffering or resisting impact, reducing the possibility of the heat exchange member 104 or the box wall being directly subjected to a larger impact.

[0097] According to some embodiments of the present application, the protective member 105 is made of buffer material and / or thermal insulation material.

[0098] For example, the material of the protective member 105 can be, but is not limited to, TPU (polyurethane), filled foaming material, etc.

[0099] 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 thermal insulation 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 exchange medium heat.

[0100] In some embodiments of the present application, referring to FIG. 8, the heat exchange member 104 is arranged outside the box body 10, and the battery 100 can further comprise a protective plate 30 connected to the box wall of the box body 10, and a protective cavity is defined between the protective plate 30 and the box wall, and the heat exchange member 104 is arranged in the protective cavity.

[0101] The protective plate 30 can be a plate member capable of playing a protective role. The protective plate 30 can include, but is not limited to, a metal plate member, a plastic plate member, and other composite material plate members, and the like. In this embodiment, the tank wall of the tank body 10 can be a bottom wall of the tank body 10, and the protective plate 30 can be arranged at the bottom of the tank body 10 at this time. Alternatively, the tank wall of the tank body 10 can be a side wall of the tank body 10, and the protective plate 30 can be arranged at the side of the tank body 10 at this time. Optionally, the protective member 105 can be arranged or not arranged in the protective cavity.

[0102] In the above technical solution, the protective 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 subjected to a collision, and improving the reliability of the heat exchange member 104, thereby improving the reliability of the battery 100. Especially when the protective plate 30 is arranged at the bottom wall of the tank body 10, the protective plate 30 can reduce the probability of damage to the heat exchange member 104 when the battery 100 is subjected to a bottom collision, effectively improving the reliability of the heat exchange member 104.

[0103] In some embodiments of the present application, the heat exchange member 104 is arranged close to the bottom wall 1031 of the tank body 10, or the heat exchange member 104 is arranged close to the side wall of the tank body 10.

[0104] Optionally, referring to FIGS. 4, 5, and 8, the heat exchange member 104 can be arranged close to the bottom wall 1031 of the tank body 10. It can be understood that the heat exchange member 104 can be arranged immediately adjacent to the bottom wall 1031 of the tank body 10, that is, the heat exchange member 104 and the bottom wall 1031 can be not attached, and a gap is left between them; or the heat exchange member 104 can be attached to the bottom wall 1031 of the tank body 10. In this embodiment, the heat exchange member 104 can be arranged on the outside of the tank body 10 or on the inside of the tank body 10.

[0105] In the above embodiment, the heat exchange section 1041 exchanges heat with the bottom wall 1031 located below the tank body 10. The tank body 10 can be integrally stamped and formed. As shown in FIGS. 3 to 7, the tank body 10 can include a bottom wall 1031 and a surrounding wall 1032. For example, the tank 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 tank body 10 are integrally stamped and formed, the connection between the bottom wall 1031 and the surrounding wall 1032 does not need to consider the sealing problem, and the sealing effect can be guaranteed, thereby avoiding the influence of mud and water from the connection between the bottom wall 1031 and the surrounding wall 1032 on the battery monomer 20, and improving the reliability of the battery 100. Moreover, the integrally stamped and formed tank body 10 does not need to be spliced, and the production efficiency can be improved.

[0106] In the 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 easy to contact the battery monomer 20 in the box 10, and the risk of short circuit, short connection and other accidents of the battery monomer 20 can be reduced. In addition, in the embodiment in which the protection piece 105 is arranged on the bottom wall 1031 of the box 10, the bottom wall 1031 of the box 10 is usually more likely to be impacted during use of the battery 100, and arranging the protection piece 105 on the bottom wall 1031 can help to better improve the impact resistance of the box 10.

[0107] Optionally, the heat exchange piece 104 can also be arranged close to the side wall of the box 10. It can be understood that the heat exchange piece 104 can be arranged immediately adjacent to the side wall of the box 10, that is, the heat exchange piece 104 and the side wall of the box 10 can be not attached, and a gap is left therebetween; or the heat exchange piece 104 can be attached to the side wall of the box 10. In this embodiment, the heat exchange piece 104 can be arranged on the outside of the box 10 or on the inside of the box 10.

[0108] In the technical solution, since the area of the bottom wall 1031 of the box 10 is relatively large, arranging the heat exchange piece 104 close to the bottom wall 1031 of the box 10 can help to increase the area of the heat exchange piece 104, thereby helping to improve the heat exchange efficiency of the battery 100, and the bottom wall 1031 of the box 10 is generally far away from the electric device, thereby providing sufficient space for arranging the heat exchange piece 104 and helping to maintain and replace the heat exchange piece 104. Arranging the heat exchange piece 104 close to the side wall of the box 10 can make the heat exchange piece 104 far away from the bottom of the electric device, thereby reducing the probability of damage of the heat exchange piece 104 due to bottom impact and helping to improve the reliability of the heat exchange piece 104, thereby improving the reliability of the battery 100.

[0109] In some embodiments of the present application, referring to FIG. 8, the side of the box wall of the box 10 close to the heat exchange section 1041 is provided with a groove 1033, and the heat exchange section 1041 is at least partially arranged in the groove 1033.

[0110] The groove 1033 can be a recessed area formed on the box wall and can serve to accommodate the heat exchange section 1041. The depth of the groove 1033 can 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; or the depth of the groove 1033 can 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 can be a slot formed on the box wall or a slot punched and formed on the box wall.

[0111] In the technical solution, the heat exchange section 1041 is arranged in the groove 1033 of the tank wall, which helps to improve the integration of the heat exchange section 1041 and the tank 10, thereby reducing the volume of the battery 100 as a whole and improving the volume energy density of the battery 100. Moreover, the heat exchange section 1041 is arranged in the groove 1033 of the tank wall, which helps to improve the connection reliability of the heat exchange section 1041 on the tank wall and reduce the probability of disengagement of the heat exchange section 1041 on the tank 10, thereby improving the working reliability of the heat exchange section 1041.

[0112] According to some embodiments of the present application, referring to FIGS. 5 and 6, the 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, which is parallel to the wall surface.

[0113] The plurality of cavity groups 1043 arranged along the second direction F2 can have some adjacent cavity groups 1043 connected to each other and some adjacent cavity groups 1043 arranged at intervals; or the plurality of cavity groups 1043 arranged along the second direction F2 are all arranged at intervals; or the adjacent cavity groups 1043 in the plurality of cavity groups 1043 arranged along the second direction F2 are all connected to each other.

[0114] For the same heat exchange section 1041, a plurality of cavity groups 1043 are arranged along the second direction F2, which helps to further improve the structural strength of the heat exchange section 1041 and makes it less likely to deform or collapse under external force during use.

[0115] According to some embodiments of the present application, in any two adjacent cavity groups 1043, the heat exchange medium of the two cavities 1042 adjacent in the second direction F2 is different.

[0116] For example, for the cavity group 1043 corresponding to the region of the tank wall with a lower temperature, the latent heat of vaporization of the heat exchange medium in the cavity group 1043 can be larger, and for the cavity group 1043 corresponding to the region of the tank wall with a higher temperature, the latent heat of vaporization of the heat exchange medium in the cavity 1042 can be smaller, so as to quickly transfer heat away.

[0117] In this way, different heat exchange media can be introduced into the cavity groups 1043 at corresponding positions according to the temperature difference of different regions of the tank wall, so as to reduce the use cost of the heat exchange section 1041, improve the use efficiency of the heat exchange medium, more accurately control the temperature of the battery 100, prolong the service life of the battery 100, and improve the use safety of the battery 100.

[0118] According to some embodiments of the present application, in any two adjacent cavity groups 1043, the heat exchange medium of the two cavities 1042 adjacent in the second direction F2 is the same.

[0119] In the embodiment in which the heat exchange medium of the two cavities 1042 adjacent in the second direction F2 is the same, the flow rate of the heat exchange medium of the two cavities 1042 can be the same or different. In the embodiment in which the heat exchange medium of the two cavities 1042 adjacent in the second direction F2 is the same, the flow direction of the heat exchange medium of the two cavities 1042 can be different or the same.

[0120] When one of the cavities 1042 leaks, the rest of the cavities 1042 can still normally achieve the heat exchange function, and compared with the single-cavity design, the redundancy of the heat exchange element 104 is higher and the reliability is better. 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 monomer 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 the two cavities 1042 adjacent in the second direction F2 can be opposite, which is conducive to uniform heat exchange capacity of the heat exchange element 104 and reduces the temperature difference of the battery 100.

[0121] For example, the flow rates of the two cavities 1042 adjacent in the second direction F2 can be different, for example, the flow rate of the heat exchange medium in the cavity 1042 corresponding to the area with small heat dissipation can be slower, and the flow rate of the heat exchange medium in the cavity 1042 corresponding to the area with large heat dissipation can be faster, thereby realizing differential heat exchange and improving the energy utilization rate of the heat exchange medium.

[0122] According to some embodiments of the present application, referring to FIGS. 5 and 6, the heat exchange section 1041 can include a plurality of pipe bodies 1044, each pipe body 1044 forms a cavity 1042 inside, and the plurality of pipe bodies 1044 are connected.

[0123] Each pipe body 1044 can include only one pipe cavity, one pipe cavity being one cavity 1042, or each pipe body 1044 can include a plurality of pipe cavities, the plurality of pipe cavities corresponding to a plurality of cavities 1042. The plurality of pipe bodies 1044 are connected, for example, the plurality of pipe bodies 1044 can be connected by adhesion; or the plurality of pipe bodies 1044 can 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 can also be connected by welding or riveting, etc.

[0124] The heat exchange section 1041 is obtained by connecting the plurality of pipe bodies 1044 side by side, so that the production difficulty of the heat exchange section 1041 is low, the manufacturability is better, and the use cost is lower.

[0125] According to some embodiments of the present application, the heat exchange section 1041 is tubular, the heat exchange section 1041 is an integrally formed piece, and a plurality of cavities 1042 are formed inside.

[0126] That is, the plurality of cavities 1042 are formed at one time. In this way, the tube walls between adjacent cavities 1042 can be shared, which is conducive to reducing the size of the heat exchange section 1041, and there is no air gap between adjacent cavities 1042, the thermal resistance of the heat exchange section 1041 is smaller, the heat conduction effect is better, and the efficiency of heat exchange 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 and reliability of the heat exchange section 1041 are improved.

[0127] According to some embodiments of the present application, referring to FIGS. 5 and 6, the heat exchange member 104 is attached to the tank wall of the tank 10.

[0128] Specifically, the surface of the tank wall near the heat exchange member 104 can be a plane, and correspondingly, the surface of the heat exchange member 104 near the tank wall can also be a plane, so that the heat exchange member 104 and the tank wall of the tank 10 are in plane contact, and the heat exchange member 104 and the tank 10 have a large heat exchange area, which is conducive to improving the heat exchange efficiency. The surface of the tank wall near the heat exchange member 104 can also be a non-plane, such as a wavy surface or a curved surface, and correspondingly, the surface of the heat exchange member 104 near the tank wall can also be a non-plane, so that the heat exchange member 104 and the tank wall of the tank 10 are also in surface-to-surface contact, and can also have a large heat exchange area.

[0129] In the above technical solution, the attachment of the heat exchange member 104 and the tank wall reduces the gap between the heat exchange member 104 and the tank wall, effectively reduces the thermal resistance, so that the heat transfer is more direct and rapid, thereby improving the overall heat exchange efficiency. Moreover, the contact area between the tank wall and the heat exchange member 104 is larger, which is conducive to achieving more efficient and rapid heat exchange.

[0130] According to some embodiments of the present application, referring to FIGS. 3 and 4, the heat exchange section 1041 is a plurality of heat exchange sections 1041, and part of the plurality of heat exchange sections 1041 are arranged spaced apart along the second direction F2 and sequentially connected, each heat exchange section 1041 extends along a 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.

[0131] For example, referring to FIGS. 3 and 4, the heat exchange sections 1041 arranged spaced apart along the second direction F2 can be sequentially connected through the connecting section 1045, the connecting section 1045 can be connected to the heat exchange section 1041 through a connecting joint, or the heat exchange section 1041 can be integrally formed with the connecting section 1045.

[0132] The heat exchange sections 1041 are sequentially connected. For example, the heat exchange sections 1041 are arranged in multiple numbers along the second direction F2, and arranged in sequence from one side to the other side of the second direction F2, and the heat exchange sections 1041 are respectively a first heat exchange section 1041, a second heat exchange section 1041, a third heat exchange section 1041, …, and an Nth heat exchange section 1041. The first heat exchange section 1041 is directly connected to the second heat exchange section 1041 through a connecting section 1045, the second heat exchange section 1041 is directly connected to the third heat exchange section 1041 through a connecting section 1045, but the third heat exchange section 1041 is not directly connected to the first heat exchange section 1041, and so on.

[0133] Each heat exchange section 1041 extends along the third direction F3. Here, the extension direction of the heat exchange section 1041 can be parallel to the third direction F3, or part or all of the extension direction of the heat exchange section 1041 can have an angle with the third direction F3, for example, the angle between the third direction F3 and the extension direction of the heat exchange section 1041 is 10°, 20°, 30°, 40°, etc.

[0134] In the above technical solution, the arrangement of the heat exchange section 1041 is better corresponding to the battery monomer 20 in the box 10 of the battery 100, which can make as many battery monomers 20 as possible to obtain better heat dissipation effect.

[0135] According to some embodiments of the application, the battery monomer 20 is arranged in multiple rows, each row of battery monomers 20 is arranged in multiple numbers, and each row of battery monomers 20 corresponds to at least one heat exchange section 1041.

[0136] For example, along the second direction F2, the battery monomer 20 is arranged in multiple rows, and each row of battery monomers 20 is arranged in multiple numbers along the third direction F3. Or, along the third direction F3, the battery monomer 20 is arranged in multiple rows, and each row of battery monomers 20 is arranged in multiple numbers along the second direction F2.

[0137] Each row of battery monomers 20 corresponds to at least one heat exchange section 1041, for example, each row of battery monomers 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 monomers 20 in each row of battery monomers 20, so that the structure of the heat exchange member 104 is simple and convenient for forming and processing. Or, each row of battery monomers 20 corresponds to multiple heat exchange sections 1041, so that the heat exchange area between each row of battery monomers 20 and the heat exchange member 104 is larger, which is beneficial to faster heat dissipation. In some other embodiments, each battery monomer 20 in each row of battery monomers 20 can correspond to one heat exchange section 1041, and multiple heat exchange sections 1041 corresponding to one row of battery monomers 20 can be arranged in multiple numbers along the arrangement direction of the battery monomers 20 in each row of battery monomers 20 and connected through the connecting section 1045.

[0138] From the above, each row of battery monomers 20 corresponds to at least one heat exchange section 1041, so as to facilitate improving the heat exchange efficiency between the heat exchange member 104 and the battery monomer 20.

[0139] According to some embodiments of the present application, the heat exchange section 1041 is arranged close to the edge of the battery monomer 20.

[0140] For example, the heat exchange section 1041 is arranged corresponding to the edge of the battery monomer 20 in the width direction, or the heat exchange section 1041 is arranged corresponding to the edge of the battery monomer 20 in the length direction. The heat exchange section 1041 is arranged opposite to the edge of the battery monomer 20, or the heat exchange section 1041 is arranged corresponding to the edge of the battery monomer 20 close to one side of the middle part of the battery monomer 20, or the heat exchange section 1041 is arranged corresponding to the edge of the battery monomer 20 away from one side of the middle part of the battery monomer 20.

[0141] It should be noted that the edge of the battery monomer 20 is usually the junction position of the side walls of the two battery monomer 20 shells, which has high structural strength and is not easy to deform under the impact of external force. By arranging the heat exchange section 1041 close to the edge of the battery monomer 20, the heat exchange section 1041 is not easy to deform.

[0142] According to some embodiments of the present application, referring to FIG. 6, the heat exchange section 1041 is arranged centrally relative to the battery monomer 20. That is, the heat exchange section 1041 is arranged corresponding to the middle part of the battery monomer 20. Here, the partial cavity 1042 can be arranged centrally relative to the battery monomer 20, or the entire heat exchange section 1041 can be arranged centrally corresponding to the battery monomer 20.

[0143] It should be noted that the heat generated by the battery monomer 20 during use is mainly concentrated in the middle part of the battery monomer 20. By arranging the heat exchange section 1041 corresponding to the middle part of the battery monomer 20, the heat transfer path can be effectively shortened, the heat exchange section 1041 can directly contact the core position of heat generation, which helps to more quickly and uniformly export heat, reduces local overheating phenomenon, improves heat management efficiency, and at the same time can more quickly perceive and respond to the temperature change of the battery monomer 20, and timely adjust cooling or heating. In particular, in high-power output or fast charging scenarios, it can quickly remove excess heat and reduce the risk of thermal runaway.

[0144] According to some embodiments of the present application, the heat exchange section 1041 is arranged corresponding to the edge of the battery monomer 20 and the middle part of the battery monomer 20, so that the heat exchange area between the battery monomer 20 and the heat exchange member 104 is larger, which is conducive to faster and more efficient heat dissipation.

[0145] As shown in FIG. 1, the power consuming device 1000 according to the embodiment of the present application includes the battery 100 according to the embodiment of the present application. The power consuming device 1000 can be any of the aforementioned devices or systems using the battery 100. By using the battery 100, the battery 100 includes the box body 10, the box body 10 includes the heat exchange member 104, the heat exchange member 104 includes the heat exchange section 1041, and the plurality of cavities 1042 are arranged along the first direction F1 in the heat exchange section 1041. The heat exchange section 1041 with the plurality of cavities 1042 has high structural strength and is less likely to deform or collapse when subjected to external force during use, and has lower risk of air tightness failure, which is conducive to improving the overall structural strength and service life of the heat exchange member 104. Meanwhile, in the present application, the plurality of cavities 1042 are arranged along the first direction F1, and the cavities 1042 on the outer side can play a buffering role when subjected to external force impact, so that the force transmitted to the cavities 1042 on the inner side and the battery monomer 20 is gradually weakened, thereby protecting the cavities 1042 on the inner side and the battery monomer 20, reducing the possibility of heat exchange failure of the heat exchange member 104, and improving the use reliability of the battery monomer 20. In addition, the plurality of cavities 1042 are independent of each other, and the plurality of cavities 1042 can be filled with different heat exchange media or control the flow parameters of the heat exchange media in different cavities 1042, thereby facilitating the purpose of more refined control of the temperature of the battery 100 and achieving better cooling effect.

[0146] The battery 100 and the vehicle according to one specific embodiment of the present application are described below with reference to the accompanying drawings.

[0147] As shown in FIGS. 1-2, the vehicle includes the battery 100, and the battery 100 includes the box body 10 and the battery monomer 20 arranged in the box body 10. As shown in FIGS. 3-7, the battery 100 further includes the heat exchange member 104 and the protection member 105. The heat exchange member 104 is arranged in close contact with 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 the heat exchange section 1041, and the cavity 1042 is arranged in the heat exchange section 1041. The cavity 1042 is arranged along the 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 the cavity group 1043 is arranged along the second direction F2, and the second direction F2 is parallel to the box wall.

[0148] In the first direction F1, the heat exchange media of any two adjacent cavities 1042 are different. In any two adjacent cavity groups 1043, the heat exchange media of the two cavities 1042 adjacent in the second direction F2 are different.

[0149] The heat exchange section 1041 is multiple, and part of the multiple heat exchange sections 1041 are arranged in the second direction F2 and sequentially communicated, each heat exchange section 1041 extends in 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 tank wall.

[0150] The battery cell 20 is arranged in multiple rows, and each row of battery cells 20 is arranged in multiple, and each row of battery cells 20 corresponds to one heat exchange section 1041. The heat exchange section 1041 is arranged centrally relative to the battery cell 20.

[0151] The heat exchange section 1041 includes multiple pipe bodies 1044, each pipe body 1044 forms a cavity 1042 inside, and the multiple pipe bodies 1044 are connected. The protection piece 105 is arranged on the tank wall and wrapped around the heat exchange piece 104. The protection piece 105 is made of a buffer thermal insulation material.

[0152] When an external force acts, the protection piece 105 first plays a role, the cavity 1042 on the lower side plays a buffering role, and finally the force transmitted to the cavity 1042 on the upper side and the battery cell 20 is gradually weakened. The heat exchange section 1041 is arranged centrally relative to the battery cell 20, which can achieve better cooling effect on the battery cell 20. The material of the heat exchange piece 104 is not limited, which can be a coating or a cushion. The number of heat exchange chambers of the heat exchange section 1041 can be unlimitedly stacked according to the actual production capacity of the process. The heat exchange section 1041 can be integrally extruded or formed by connecting multiple separate pipe pieces through a certain medium.

[0153] In the above embodiment, the heat exchange section 1041 includes multiple cavities 1042 arranged in the first direction F1 and multiple cavities 1042 arranged in 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 realize the heat management function, and has higher structural strength and is not easy to deform, thereby reducing the dependence of the heat exchange section 1041 on the strength of the tank 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.

[0154] Because there are different cavities 1042 and they can be independently used as cooling channels, in order to make the temperature uniformization effect of the entire battery 100 better, various heat exchange medium combinations can be made in different cavities 1042, so that the matrix cooling effect can be achieved. Different heat exchange media can be introduced into different cavities 1042, so that more precise control of the temperature of the battery 100 can be realized, and the heat exchange efficiency can be improved. The cooperation of the multiple cavities 1042 of the heat exchange section 1041 can make the cooling effect optimal,

[0155] In addition, the buffer heat preservation structure (protective member 105) is added outside the heat exchange section 1041 to prevent sandstone and achieve heat preservation and other functions. The introduction of the buffer heat preservation material minimizes the heat loss of the heat exchange member 104 during normal use, and the heat exchange section 1041 is more resistant to external damage.

[0156] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application.

[0157] In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, wherein, The battery comprises: a box body, an accommodating space being formed inside the box body; a battery cell arranged in the accommodating space; a heat exchange member, the heat exchange member comprising a heat exchange section arranged at one side of a wall surface of the battery cell for heat exchange with the battery cell, the heat exchange section being provided with cavities, a plurality of the cavities being arranged along a first direction, the first direction being perpendicular to the wall surface.

2. The battery of claim 1, wherein, 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 or 2, wherein 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 of any one of claims 1-3, wherein, In the first direction, heat exchange medium is arranged 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 member.

5. The battery of any one of claims 1-4, wherein, The heat exchange member is arranged outside the box body.

6. The battery of claim 5, wherein, The battery further comprises a protective member, the protective member being arranged in close contact with a box wall of the box body and covering the heat exchange member.

7. The battery of claim 6, wherein, The protective member is made of a buffer material and / or a thermal insulation material.

8. The battery of any one of claims 1-7, wherein, The heat exchange member is arranged close to a bottom wall of the box body, or the heat exchange member is arranged close to a side wall of the box body.

9. The battery of any one of claims 1-8, wherein, The plurality of cavities arranged along the first direction form a cavity group, a plurality of the cavity groups being arranged along a second direction, the second direction being parallel to the wall surface.

10. The battery of claim 9, wherein, In any two adjacent cavity groups, the heat exchange medium of the two cavities adjacent in the second direction is different.

11. The battery of claim 9 or 10, wherein, In any two adjacent cavity groups, the heat exchange medium of the two cavities adjacent in the second direction is the same.

12. The battery of any one of claims 1-11, wherein, The heat exchange section comprises a plurality of pipe bodies, each of the pipe bodies being internally formed with the cavities, and the plurality of pipe bodies being connected.

13. The battery of any one of claims 1-12, wherein, The heat exchange section is tubular, the heat exchange section is an integrally formed member, and the heat exchange section is internally formed with the plurality of cavities.

14. The battery of any one of claims 1-13, wherein, The heat exchange member is arranged in close contact with the box wall of the box body.

15. The battery of any one of claims 1-14, wherein, The heat exchange section is a plurality of heat exchange sections, part of the plurality of heat exchange sections being arranged apart along a second direction and sequentially connected, each of the heat exchange sections extending along a third direction, the third direction being perpendicular to the second direction, and the third direction and the second direction being parallel to the wall surface.

16. The battery of any one of claims 1-15, wherein, The battery cell is arranged in a plurality of rows, each row of the battery cell being arranged in a plurality of battery cells, and each row of the battery cell corresponding to at least one heat exchange section.

17. The battery of claim 16, wherein, The heat exchange section is arranged close to an edge of the battery cell.

18. The battery of claim 16 or 17, wherein, The heat exchange section is arranged centrally relative to the battery cell.

19. An electrical device, comprising: The battery comprises the battery as claimed in any one of claims 1 to 18.

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