Battery and electric device

Abstract

The utility model provides a battery and a power utilization device, and belongs to the technical field of batteries. The battery comprises a box body, a heat exchange assembly and a battery monomer, the box body comprises a first basin body and a first annular body, the first basin body is provided with a first accommodating cavity, the first annular body is connected with the side wall of the first basin body, and the first annular body surrounds an opening of the first accommodating cavity; the heat exchange assembly comprises a heat exchange body and a second annular body, and the second annular body surrounds the heat exchange body and is connected with the heat exchange body. The battery monomers are positioned in the first accommodating cavity and perform heat exchange with the heat exchange assembly; wherein the first annular body is connected with the second annular body. Through the connection mode of the first annular body and the second annular body, the box body and the heat exchange assembly are fixed, so that the internal space of the battery occupied by the connection of the heat exchange assembly is saved, and the utilization rate of the internal space of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the related art, the battery includes a battery cell and a battery box for accommodating the battery cell. In order to assist the battery cell in heat exchange, a heat exchange component is also provided in the battery box. The installation and fixation of the heat exchange component occupies space in the battery box, thereby affecting the space utilization rate of the battery box. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background technology. To this end, one purpose of the present application is to provide a battery and an electrical device to increase the utilization rate of the internal space of the battery.

[0005] An embodiment of the first aspect of the present application provides a battery, which includes a case and a heat exchange assembly, the case includes a first basin and a first annular body, the first basin has a first accommodating cavity, the first annular body is connected to the side wall of the first basin, and the first annular body surrounds the opening of the first accommodating cavity; the heat exchange assembly includes a heat exchange body and a second annular body, the second annular body surrounds the heat exchange body and is connected to the heat exchange body; the battery cell is located in the first accommodating cavity and performs heat exchange with the heat exchange assembly; wherein the first annular body is connected to the second annular body.

[0006] In the technical solution of the embodiment of the present application, the box body and the heat exchange component are fixedly connected by utilizing the method of connecting the first annular body and the second annular body. The connection position of the first annular body and the second annular body is located on the outside of the first accommodating cavity and will not occupy the space of the first accommodating cavity of the box body, so that the first accommodating cavity has more space to accommodate battery cells, thereby improving the utilization rate of the internal space of the battery and facilitating the arrangement of battery cells. The circumferential connection method adopted by the first annular body and the second annular body further improves the connection strength between the box body and the heat exchange component.

[0007] In some embodiments, the heat exchange body is located in the first accommodating cavity, the heat exchange body has a second accommodating cavity, and the battery cell is located in the second accommodating cavity; the second annular body is connected to the side wall of the heat exchange body, and the second annular body surrounds the opening of the second accommodating cavity. By arranging the heat exchange body in the first accommodating cavity, and the heat exchange body has a second accommodating cavity, the battery cell can be arranged in the second accommodating cavity, the box body carries the heat exchange assembly, and the heat exchange assembly carries the battery cell, so as to realize the heat exchange requirement of the heat exchange assembly from the bottom of the battery cell.

[0008] In some embodiments, the side wall of the heat exchange body is fitted with the side wall of the first basin, the bottom wall of the heat exchange body is fitted with the bottom wall of the first basin, and the heat exchange flow channel of the heat exchange assembly is located on the bottom wall of the heat exchange body. By fitting the side wall of the heat exchange body with the side wall of the first basin, and fitting the bottom wall of the heat exchange body with the bottom wall of the first basin, the space occupied by the heat exchange assembly in the box can be reduced as much as possible, and the uniformity of the bearing force of the box can also be increased.

[0009] In some embodiments, the first annular body has a first connection hole, the second annular body has a second connection hole corresponding to the first connection hole, and the battery further includes a first connection member, and the first connection member connects the first annular body and the second annular body through the first connection hole and the second connection hole. By providing connection holes on the first annular body and the second annular body, and connecting the two by passing the first connection member through the connection holes, the structure is simple and the operation is convenient, which facilitates the installation and connection of the second annular body with the first annular body, and also facilitates the subsequent disassembly and maintenance, thereby improving operability.

[0010] In some embodiments, the first annular body has an insert nut, the insert nut is fixed in the first connection hole, and the first connector passes through the second connection hole and is connected to the insert nut. By installing the insert nut in the first annular body, the connection and fixing strength of the first connector and the insert nut are improved by connecting the first connector and the insert nut, so as to meet the connection requirements of the first annular body with the second annular body under different materials.

[0011] In some embodiments, the battery further comprises: a top cover, the top cover covers the opening of the first accommodating cavity, the second annular body is located between the top cover and the first annular body, and the top cover is connected to the second annular body. By increasing the connection between the top cover and the second annular body, the second annular body is connected to the top cover and the box body respectively, thereby increasing the connection and fixing strength between the heat exchange component and the battery, and at the same time, the connection between the top cover and the second annular body and the connection between the second annular body and the box body is also used to achieve the connection between the top cover and the box body.

[0012] In some embodiments, the top cover has an escape opening, the escape opening is communicated with the second connection hole, and the first connector passes through the escape opening to connect the first annular body and the second annular body. By setting the escape opening on the top cover, an installation space is provided for the first connector to connect the first annular body and the second annular body, which is convenient for operation and installation. At the same time, the first connector is used to connect only the first annular body and the second annular body. Compared with the first connector connecting the top cover, the first annular body and the second annular body, it has better connection stability and reduces the possibility of connection failure caused by too many locking interfaces.

[0013] In some embodiments, the second annular body further has a third connection hole, the top cover has a fourth connection hole corresponding to the third connection hole, and the battery further includes a second connection member, and the second connection member connects the top cover and the second annular body through the third connection hole and the fourth connection hole. By providing corresponding connection holes on the second annular body and the top cover, and connecting the two by passing the second connection member through the connection holes, the structure is simple and the operation is convenient, which facilitates the installation and connection of the second annular body and the top cover, and also facilitates the subsequent disassembly and maintenance, thereby improving operability.

[0014] In some embodiments, the second annular body has a plurality of second connection holes and a plurality of third connection holes, and the plurality of second connection holes and the plurality of third connection holes all surround the heat exchange body. By arranging a plurality of second connection holes and a plurality of third connection holes on the second annular body, and arranging the second connection holes and the third connection holes around the heat exchange body, the connection force is made more uniform, the stability of the connection between the second annular body and the box body and the top cover is improved, and the sealing effect can also be improved.

[0015] In some embodiments, the plurality of second connection holes and the plurality of third connection holes are arranged alternately and spaced apart. By arranging the second connection holes and the third connection holes alternately and spaced apart, the heat exchange assembly is alternately connected to the box body and the top cover, respectively, further improving the stability and sealing of the connection between the heat exchange assembly and the box body and the top cover.

[0016] In some embodiments, the number of the second connection holes is less than the number of the third connection holes, and both sides of the second connection holes are third connection holes. Further considering that the seal between the heat exchange assembly and the top cover needs to be strengthened, and the heat exchange assembly and the box body only need to be fixedly connected, the arrangement of the number of the second connection holes being less than the number of the third connection holes, while meeting the connection requirements of the heat exchange assembly and the box body, appropriately reduces the number of connectors between the heat exchange assembly and the box body, facilitates operation and quick installation, and improves assembly efficiency. At the same time, both sides of the second connection hole are third connection holes, so as to achieve staggered connection between the heat exchange assembly and the top cover and the box body, and improve connection stability.

[0017] In some embodiments, when the heat exchange body has a second accommodating cavity, a sealing gasket is provided between the second annular body and the top cover. By adding a sealing gasket between the second annular body and the top cover, the sealing performance between the heat exchange component and the top cover is improved.

[0018] In some embodiments, the shortest distance from the second connection hole to the side wall of the heat exchange body is greater than the shortest distance from the third connection hole to the side wall of the heat exchange body. Considering that the setting of the avoidance hole of the top cover may affect the sealing of the top cover and the heat exchange assembly, in order to minimize the influence of the avoidance hole, the second connection hole and the third connection hole are arranged in a staggered manner so that the second connection hole is farther away from the side wall of the heat exchange body than the third connection hole, so that the avoidance hole is correspondingly farther away from the side wall of the heat exchange body, which facilitates the arrangement of the sealing gasket between the side wall of the heat exchange body and the third connection hole.

[0019] In some embodiments, the shortest distance from the third connection hole to the side wall of the heat exchange body is greater than or equal to 8 mm and less than or equal to 25 mm. A sealing gasket is laid between the third connection hole and the side wall of the heat exchange body, and the shortest distance from the third connection hole to the side wall of the heat exchange body is greater than or equal to 8 mm, so that there is enough space between the third connection hole and the side wall of the heat exchange body to lay the sealing gasket. At the same time, the shortest distance from the third connection hole to the side wall of the heat exchange body is less than or equal to 25 mm, so that the width of the second annular body is not too large, causing the volume of the battery to be too large.

[0020] In some embodiments, the first annular body is provided with a through hole, which is connected to the third connecting hole, and the opening size of the through hole is larger than the opening size of the third connecting hole. By providing a through hole in the first annular body, an installation space is provided for the second connecting member to connect the second annular body and the top cover, which is convenient for operation and installation. At the same time, the second connecting member is used to connect only the second annular body and the top cover, which has better connection stability compared to the second connecting member connecting the top cover, the first annular body and the second annular body, and reduces the possibility of connection failure caused by too many locking interfaces.

[0021] In some embodiments, a positioning boss is provided on the box body, and a positioning hole is provided on the heat exchange component, and the positioning boss passes through the positioning hole. By providing the positioning boss on the box body and providing the corresponding positioning hole on the heat exchange component, when installing the heat exchange component, it is convenient to quickly install and position the heat exchange component, thereby improving the installation efficiency.

[0022] An embodiment of the second aspect of the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0025] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0026] Figure 2 A schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0027] Figure 3 A schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application;

[0028] Figure 4 This is a schematic diagram of the exploded structure of a battery box according to some embodiments of the present application;

[0029] Figure 5 A schematic diagram of the exploded structure of another battery box according to some embodiments of the present application;

[0030] Figure 6 A top view of a battery box according to some embodiments of the present application;

[0031] Figure 7 for Figure 6 Cross-sectional view of the AA section;

[0032] Figure 8 for Figure 6 A partial enlarged schematic diagram of part B;

[0033] Fig. 9 A top view of another battery box according to some embodiments of the present application.

[0034] Description of reference numerals:

[0035] 1. Vehicle; 10. Battery; 20. Controller; 30. Motor; 100. Battery box; 110. Box; 111. First basin; 112. First annular body; 1121. First connecting hole; 113. First accommodating cavity; 114. Through hole; 115. Positioning boss; 116. Insert nut; 120. Heat exchange component; 121. Heat exchange body; 1211. Second accommodating cavity; 122. Second annular body; 1221. Second connecting hole; 1222. Third connecting hole; 1223. Positioning hole; 130. Top cover; 131. Avoidance; 132. Fourth connecting hole; 140. Sealing gasket; 150. First connecting piece; 160. Second connecting piece; 200. Battery cell; 210. End cover; 211. Electrode terminal; 220. Shell; 230. Cell assembly; 231. Ear. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0041] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0042] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] At present, from the perspective of market development, 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, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0045] Batteries generate heat during use. If the heat cannot be effectively dissipated, it may cause battery performance to decline, shorten life, and even cause safety problems. The main methods of battery heat dissipation include air cooling, liquid cooling, natural convection cooling, and direct cooling. Liquid cooling mainly transfers the heat generated by the battery cell to the liquid cooling pipe through a thermally conductive silicone sheet, and then the coolant circulates in the pipe to take away the heat. The liquid cooling system is highly efficient, and the coolant's strong specific heat capacity can absorb the heat generated by the battery cell during operation, keeping the battery operating within a safe temperature range.

[0046] In a low temperature environment, the chemical reaction rate inside the battery will decrease, resulting in problems such as decreased battery capacity, increased resistance, and decreased discharge voltage. Especially in the cold winter, it is easy for the battery to fail to work properly. In order to solve the problem of decreased battery performance in a low temperature environment, a common method is to heat the battery. By heating, the rate of chemical reactions inside the battery can be increased, and the discharge voltage of the battery can be increased, so that the battery can work better in a low temperature environment. At the same time, heating can also reduce the internal resistance of the battery and increase the output power of the battery. Therefore, by filling the heat exchange pipes of the heat exchange components with heat exchange media of different temperatures, the heat dissipation or heating of the battery can be achieved to meet the current temperature requirements of the battery.

[0047] At present, the battery includes a box body, a battery cell and a heat exchange assembly located inside the box body. By setting a locking structure inside the battery, the heat exchange assembly is fixed inside the battery by using the locking structure. Since the arrangement of the locking structure inside the box body will occupy the space inside the box body, it may lead to a reduction in the number of installed battery cells, reducing the utilization rate of the internal space of the battery.

[0048] In order to solve this technical problem, the connection position between the heat exchange component and the inside of the box is moved from the inside of the box to the outside of the box. By connecting the second annular body of the heat exchange component with the first annular body of the box outside the box, the space inside the box is saved, which makes it easier to accommodate more battery cells inside the box, improve the utilization rate of the box space, and also facilitate the arrangement of battery cells.

[0049] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system comprising the battery disclosed in the present application can be used to form the electrical device, which is beneficial to improve the utilization rate of the internal space of the box and improve the battery performance.

[0050] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0051] For the convenience of description, the following embodiments are described by taking a vehicle 1 as an example of an electrical device in an embodiment of the present application.

[0052] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. Vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 10 is provided inside the vehicle 1, and the battery 10 may be provided at the bottom, head or tail of the vehicle 1. The battery 10 may be used to power the vehicle 1, for example, the battery 10 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 20 and a motor 30, and the controller 20 is used to control the battery 10 to power the motor 30, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0053] In some embodiments of the present application, the battery 10 can be used not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0054] Please refer to Figure 2 , Figure 2 Schematic diagram of the exploded structure of the battery provided for some embodiments of the present application. The battery 10 includes a battery box 100 and a battery cell 200, and the battery cell 200 is contained in the battery box 100. Among them, the battery box 100 is used to provide a storage space for the battery cell 200, and the battery box 100 can adopt a variety of structures. In some embodiments, the battery box 100 may include a box body 110 and a top cover 130, and the box body 110 and the top cover 130 cover each other, and the box body 110 and the top cover 130 jointly define a storage space for accommodating the battery cell 200. The box body 110 can be a hollow structure with one end open, and the top cover 130 can be a plate-like structure, and the top cover 130 covers the open side of the box body 110, so that the top cover 130 and the box body 110 jointly define a storage space; the top cover 130 and the box body 110 can also be hollow structures with one side open, and the open side of the top cover 130 covers the open side of the box body 110. Of course, the battery box 100 formed by the top cover 130 and the box body 110 can be in various shapes, such as a cylinder, a cuboid, etc.

[0055] In the battery 10, there may be multiple battery cells 200, and the multiple battery cells 200 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 200 are both connected in series and in parallel. The multiple battery cells 200 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 200 is accommodated in the battery box 100; of course, the battery 10 may also be a battery module formed by connecting multiple battery cells 200 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the battery box 100. The battery 10 may also include other structures, for example, the battery 10 may also include a busbar component for realizing electrical connection between the multiple battery cells 200.

[0056] Each battery cell 200 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 200 may be cylindrical, flat, rectangular, or in other shapes.

[0057] Please refer to Figure 3 , Figure 3 The schematic diagram of the decomposition structure of a battery cell provided in some embodiments of the present application. A battery cell 200 refers to the smallest unit that constitutes a battery. Figure 3 The battery cell 200 includes an end cover 210, a shell 220, a battery cell assembly 230 and other functional components.

[0058] The end cap 210 refers to a component that covers the opening of the shell 220 to isolate the internal environment of the battery cell 200 from the external environment. Without limitation, the shape of the end cap 210 can be adapted to the shape of the shell 220 to match the shell 220. Optionally, the end cap 210 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 210 is not easily deformed when it is squeezed and collided, so that the battery cell 200 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 211 can be provided on the end cap 210. The electrode terminal 211 can be used to electrically connect with the battery cell assembly 230 to output or input the electrical energy of the battery cell 200. In some embodiments, the end cap 210 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 200 reaches a threshold. The material of the end cap 210 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member may be provided inside the end cap 210 to isolate the electrical connection components in the housing 220 from the end cap 210 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0059] The shell 220 is a component used to cooperate with the end cap 210 to form the internal environment of the battery cell 200, wherein the formed internal environment can be used to accommodate the battery cell assembly 230, the electrolyte and other components. The shell 220 and the end cap 210 can be independent components, and an opening can be set on the shell 220, and the internal environment of the battery cell 200 is formed by covering the opening with the end cap 210 at the opening. Without limitation, the end cap 210 and the shell 220 can also be integrated. Specifically, the end cap 210 and the shell 220 can form a common connection surface before other components are put into the shell, and when the interior of the shell 220 needs to be encapsulated, the end cap 210 covers the shell 220. The shell 220 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 220 can be determined according to the specific shape and size of the battery cell assembly 230. The material of the shell 220 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0060] The battery cell assembly 230 is a component in the battery cell 200 where electrochemical reactions occur. One or more battery cell assemblies 230 may be included in the housing 220. The battery cell assembly 230 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the battery cell assembly, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 231. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tab 231 connects the electrode terminals to form a current loop.

[0061] Please refer to Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the exploded structure of a battery box according to some embodiments of the present application; Figure 5 This is a schematic diagram of the exploded structure of another battery box of some embodiments of the present application; the battery 10 includes a box body 110, a heat exchange assembly 120 and a battery cell 200, the box body 110 includes a first basin body 111 and a first annular body 112, the first basin body 111 has a first accommodating cavity 113, the first annular body 112 is connected to the side wall of the first basin body 111, and the first annular body 112 surrounds the opening of the first accommodating cavity 113; the heat exchange assembly 120 includes a heat exchange body 121 and a second annular body 122, the second annular body 122 surrounds the heat exchange body 121 and is connected to the heat exchange body 121; the battery cell 200 is located in the first accommodating cavity 113, and performs heat exchange with the heat exchange assembly 120, wherein the first annular body 112 is connected to the second annular body 122.

[0062] The battery box 100 includes a box body 110 and a heat exchange assembly 120. The box body 110 is a structure for accommodating a battery cell 200, and includes a first basin body 111 and a first annular body 112. The first basin body 111 can be understood as a hollow structure with one end open, and its hollow structure can be a hollow cylinder, a hollow rectangular parallelepiped, etc. The first basin body 111 includes a bottom wall and a side wall. The bottom wall of the first basin body 111 and the side wall of the first basin body 111 surround a first accommodating cavity 113, and the battery cell 200 is located in the first accommodating cavity 113.

[0063] The first annular body 112 is an edge structure of the box body 110, and is used for connecting and fixing the box body 110. The first annular body 112 surrounds the opening of the first accommodating cavity 113 and is connected to the side wall of the first basin body 111. For example, the opening of the first accommodating cavity 113 is a circular opening, and the first annular body 112 is a circular ring; for example, the opening of the first accommodating cavity 113 is a square opening, and the first annular body 112 is a square ring. Exemplarily, there is an angle between the extension direction of the first annular body 112 and the extension direction of the side wall of the first basin body 111, and the first annular body 112 can be understood as a flange structure of the box body 110.

[0064] The heat exchange assembly 120 is a structure for heat exchange of the battery cell 200, and heat exchange is achieved by contact between the battery cell 200 and the heat exchange assembly 120. Heat exchange includes auxiliary heat dissipation and auxiliary heating, and the location of heat exchange can be the top of the battery cell 200 or the bottom of the battery cell 200. Heat exchange can be achieved by liquid flow or gas flow.

[0065] The heat exchange assembly 120 specifically includes a heat exchange body 121 and a second annular body 122. A heat exchange flow channel is provided inside the heat exchange body 121. The heat exchange flow channel is filled with a heat exchange medium. The battery cell 200 is in contact with the heat exchange body 121. The flow of the heat exchange medium realizes heat exchange with the battery cell 200. Exemplarily, the temperature of the battery cell 200 is relatively high. The bottom of the battery cell 200 is in contact with the heat exchange body 121. The heat exchange flow channel of the heat exchange body 121 contains cooling liquid. The cooling liquid flows in the heat exchange flow channel to perform heat exchange with the battery cell 200, assisting the battery cell 200 in cooling down and reducing the risk of the battery cell 200 caused by high temperature. For example, the battery cell 200 is in a cold environment where it is not in operation, and the bottom of the battery cell 200 is in contact with the heat exchange body 121. The heat exchange flow channel of the heat exchange body 121 contains a liquid with a certain amount of heat. The liquid with heat flows in the heat exchange flow channel to exchange heat with the battery cell 200, which helps the battery cell 200 to heat up quickly and improves the performance of the battery cell 200. The specific structure of the heat exchange flow channel inside the heat exchange body 121 is not limited and can be determined according to actual needs. For example, the heat exchange flow channel inside the heat exchange body 121 is a linear structure or a curved structure.

[0066] The second annular body 122 is the edge structure of the heat exchange assembly 120, which is used for connecting and fixing the heat exchange assembly 120. The second annular body 122 surrounds the heat exchange body 121 and is connected to the heat exchange body 121. For example, the heat exchange body 121 is circular, and the second annular body 122 is a circular ring; for example, the heat exchange body 121 is square, and the second annular body 122 is a square ring. Exemplarily, the extension direction of the second annular body 122 is at an angle to the extension direction of the heat exchange body 121, and the second annular body 122 can be understood as a flange fixing structure of the heat exchange assembly 120. Exemplarily, the extension direction of the second annular body 122 is parallel to the extension direction of the heat exchange body 121, and the second annular body 122 can be understood as an extension fixing structure of the heat exchange assembly 120.

[0067] The connection between the first annular body 112 and the second annular body 122 can be simply understood as the connection between the edge of the box 110 and the edge of the heat exchange assembly 120, so as to realize the fixed connection between the heat exchange assembly 120 and the box 110. The connection position between the first annular body 112 and the second annular body 122 belongs to the outside of the box 110, does not occupy the space inside the box 110, and is convenient for the arrangement of the battery cells 200 inside the box 110. The connection method between the first annular body 112 and the second annular body 122 is not limited, and can be determined according to needs, and a circumferential connection method is adopted to improve the connection stability. Exemplarily, the heat exchange assembly 120 and the box 110 are both made of metal, and the first annular body 112 and the second annular body 122 are fitted and connected by welding. Exemplarily, the heat exchange assembly 120 is made of metal, and the box 110 is made of plastic material. The contact surface of the first annular body 112 and the second annular body 122 is fitted as a flange surface and connected by bolts.

[0068] By utilizing the method of connecting the first annular body 112 and the second annular body 122, the box body 110 and the heat exchange component 120 are fixedly connected. The connection position between the first annular body 112 and the second annular body 122 is located on the outside of the first accommodating cavity 113 and will not occupy the space of the first accommodating cavity 113 of the box body 110, so that the first accommodating cavity 113 has more space to accommodate the battery cells 200, thereby improving the utilization rate of the internal space of the battery 10 and facilitating the arrangement of the battery cells 200.

[0069] Furthermore, the circumferential connection method adopted by the first annular body 112 and the second annular body 122 further improves the connection strength between the box body 110 and the heat exchange assembly 120 .

[0070] According to some embodiments of this application, please refer to Figure 4 and Figure 5The heat exchange body 121 is located in the first accommodating cavity 113 , the heat exchange body 121 has a second accommodating cavity 1211 , the battery cell 200 is located in the second accommodating cavity 1211 , the second annular body 122 is connected to the side wall of the heat exchange body 121 , and the second annular body 122 surrounds the opening of the second accommodating cavity 1211 .

[0071] The heat exchange body 121 is located in the first accommodating chamber 113. The heat exchange body 121 may include a heat exchange bottom wall and a heat exchange side wall. The heat exchange bottom wall and the heat exchange side wall surround and form a second accommodating chamber 1211. The second accommodating chamber 1211 can be used to accommodate the battery cell 200. In the heat exchange body 121, only the heat exchange bottom wall may be provided with a heat exchange flow channel for the heat exchange medium, or both the heat exchange bottom wall and the heat exchange side wall may be provided with a heat exchange flow channel for the heat exchange medium. The heat exchange bottom wall of the heat exchange body 121 is located at the bottom of the battery cell 200, and the heat exchange of the battery cell 200 is realized through the bottom of the battery cell 200.

[0072] The second annular body 122 surrounds the opening of the second accommodating cavity 1211 and is connected to the side wall of the heat exchange body 121. There is an angle between the extension direction of the second annular body 122 and the extension direction of the side wall of the heat exchange body 121. The second annular body 122 can be understood as a flange fixing structure of the heat exchange component 120, that is, the flange structure of the box body 110 is connected to the flange structure of the heat exchange component 120.

[0073] By arranging the heat exchange body 121 in the first accommodating cavity 113, and the heat exchange body 121 has a second accommodating cavity 1211, the battery cell 200 can be arranged in the second accommodating cavity 1211, the box body 110 carries the heat exchange component 120, and the heat exchange component 120 carries the battery cell 200, thereby realizing the heat exchange requirement of the heat exchange component 120 from the bottom of the battery cell 200.

[0074] According to some embodiments of the present application, the side walls of the heat exchange body 121 are in contact with the side walls of the first basin 111 , the bottom wall of the heat exchange body 121 is in contact with the bottom wall of the first basin 111 , and the heat exchange channel of the heat exchange assembly 120 is located on the bottom wall of the heat exchange body 121 .

[0075] The heat exchange body 121 is located in the first accommodating chamber 113. In order to minimize the space occupied by the heat exchange component 120 in the box body 110, the heat exchange bottom wall and the heat exchange side wall of the heat exchange body 121 surround the second accommodating chamber 1211 with a larger space for accommodating the battery cell 200. The heat exchange body 121 is as close to the inner wall of the box body 110 as possible, reducing the space between the heat exchange body 121 and the inner wall of the box body 110 and increasing the space of the second accommodating chamber 1211, that is, the side wall of the heat exchange body 121 is close to the side wall of the first basin body 111, and the bottom wall of the heat exchange body 121 is close to the bottom wall of the first basin body 111. The heat dissipation of the heat exchange component 120 and the space occupied are comprehensively considered. For example, the heat exchange flow channel of the heat exchange component 120 is located on the bottom wall of the heat exchange body 121, and the side wall of the heat exchange body 121 can be a sheet structure connected to the bottom wall of the heat exchange body 121.

[0076] By fitting the side walls of the heat exchange body 121 with the side walls of the first basin 111, and fitting the bottom wall of the heat exchange body 121 with the bottom wall of the first basin 111, the space occupied by the heat exchange assembly 120 in the box body 110 can be reduced as much as possible, while also increasing the uniformity of the load-bearing force of the box body 110.

[0077] According to some embodiments of this application, please refer to Figure 4 and Figure 5 The first annular body 112 has a first connection hole 1121, and the second annular body 122 has a second connection hole 1221 corresponding to the first connection hole 1121. The battery 10 also includes a first connecting member 150, and the first connecting member 150 connects the first annular body 112 and the second annular body 122 through the first connection hole 1121 and the second connection hole 1221.

[0078] The first annular body 112 and the second annular body 122 can be connected by adding a connecting piece. The first annular body 112 serves as the connecting flange surface of the box body 110, and the second annular body 122 serves as the connecting flange surface of the heat exchange component 120. The connecting flange surface of the box body 110 fits with the connecting flange surface of the heat exchange component 120. The first connecting hole 1121 is arranged on the first annular body 112, and the second connecting hole 1221 is arranged on the second annular body 122. The position of the first connecting hole 1121 corresponds to the position of the second connecting hole 1221 one by one. The first connecting piece 150 passes through the first connecting hole 1121 and the second connecting hole 1221 to connect the first annular body 112 and the second annular body 122.

[0079] For example, the first connection hole 1121 and the second connection hole 1221 may be inner holes with threads, and the first connection member 150 may be a self-locking bolt, which is connected to the first connection hole 1121 and the second connection hole 1221. For example, the first connection hole 1121 is a through hole that passes through the first annular body 112, and the second connection hole 1221 is a through hole that passes through the second annular body 122. The first connection member 150 may be a bolt and a nut, and the bolt passes through the first connection hole 1121 and the second connection hole 1221 and is connected with the nut. For example, the second connection hole 1221 is a through hole that passes through the second annular body 122, and the first connection hole 1121 may be an inner hole with threads, which may also be connected with a self-locking bolt.

[0080] By setting connecting holes on the first annular body 112 and the second annular body 122, and connecting the two by passing the first connecting member 150 through the connecting holes, the structure is simple and the operation is convenient, which facilitates the installation and connection of the second annular body 122 and the first annular body 112, and also facilitates the subsequent disassembly and maintenance, thereby improving operability.

[0081] According to some embodiments of the present application, Figure 7 for Figure 6 For the cross-sectional view of the AA part, please refer to Figure 6 and Figure 7 The first annular body 112 has an insert nut 116 , which is fixed in the first connecting hole 1121 , and the first connecting member 150 passes through the second connecting hole 1221 and is connected to the insert nut 116 .

[0082] The materials of the first annular body 112 are different, and the specific connection method needs to be adapted and adjusted. For example, the box body 110 is an injection molded box body, and its first annular body 112 is made of plastic material, the heat exchange component 120 is made of metal material, and the second annular body 122 is also made of metal material. In order to better connect the metal and the plastic material, an insert nut 116 is installed in the first annular body 112, and the insert nut 116 is fixed in the first connecting hole 1121. The first connecting member 150 passes through the second connecting hole 1221 of the second annular body 122 and enters the first connecting hole 1121 to be connected and locked with the insert nut 116, thereby realizing the fixation of the plastic first annular body 112 and the metal second annular body 122.

[0083] By installing the insert nut 116 in the first annular body 112 and connecting the first connecting member 150 with the insert nut 116, the connection and fixing strength between the first connecting member 150 and the insert nut 116 is improved, so as to meet the connection requirements of the first annular body 112 with the second annular body 122 under different materials.

[0084] According to some embodiments of this application, please refer to Figure 4The battery 10 further includes a top cover 130 , which covers the opening of the first accommodating cavity 113 . The second annular body 122 is located between the top cover 130 and the first annular body 112 , and the top cover 130 is connected to the second annular body 122 .

[0085] The battery box 100 includes a box body 110, a heat exchange component 120 and a top cover 130. The top cover 130 and the box body 110 cover each other to jointly define a storage space for accommodating the battery cell 200. The specific structure of the top cover 130 is not limited. The top cover 130 can be a plate-like structure, and the top cover 130 covers the opening of the first storage cavity 113 of the box body 110. The top cover 130 can also be a hollow structure with an opening on one side, and the open side of the top cover 130 covers the open side of the first storage cavity 113 of the box body 110.

[0086] The heat exchange component 120 is located between the top cover 130 and the box body 110, the second annular body 122 is located between the top cover 130 and the first annular body 112, the second annular body 122 is connected to the first annular body 112, and the second annular body 122 is also connected to the top cover 130, and the connection method can be a flange connection method, that is, one side of the connecting flange surface of the heat exchange component 120 is in contact with the connecting flange surface of the box body 110, and the other side opposite to the connecting flange surface of the heat exchange component 120 is in contact with the flange surface of the edge of the top cover 130.

[0087] By increasing the connection between the top cover 130 and the second annular body 122, the connection between the second annular body 122 and the top cover 130 and the box body 110 is realized, thereby increasing the connection and fixing strength between the heat exchange component 120 and the box body 110. At the same time, by utilizing the connection between the top cover 130 and the second annular body 122, and the connection between the second annular body 122 and the box body 110, the connection between the top cover 130 and the box body 110 is also realized.

[0088] According to some embodiments of this application, please refer to Figure 4 and Figure 8 , Figure 8 for Figure 6 In the partially enlarged schematic diagram of part B, the top cover 130 has an escape opening 131 , which is communicated with the second connecting hole 1221 , and the first connecting member 150 passes through the escape opening 131 to connect the first annular body 112 and the second annular body 122 .

[0089] The top cover 130 has an escape opening 131, which can be understood as a through hole or a gap on the edge of the top cover 130. The escape opening 131 is connected to the second connection hole 1221, providing space for the first connection member 150 to pass through the top cover 130 to connect the second annular body 122 with the first annular body 112. The specific structure and shape are not limited. The escape opening 131 can be a square opening, a circular opening, or an opening of other shapes. It should be noted that the opening size of the escape opening 131 should be larger than the opening size of the second connection hole 1221, and should meet the requirements for the first connection member 150 to pass through and connect. It should be noted here that the escape opening 131 is set at the top cover 130 position corresponding to the second connection hole 1221. Figure 4 The single avoidance opening 131 shown is only used for auxiliary explanation and does not mean that the top cover 130 has only a single avoidance opening 131 . The specific number of avoidance openings 131 should be determined according to the actual number of second connection holes 1221 .

[0090] By setting an avoidance opening 131 on the top cover 130, an installation space is provided for the first connecting member 150 to connect the first annular body 112 and the second annular body 122, which is convenient for operation and installation. At the same time, the first connecting member 150 is used to connect only the first annular body 112 and the second annular body 122. Compared with the first connecting member 150 connecting the top cover 130, the first annular body 112 and the second annular body 122, it has better connection stability and reduces the possibility of connection failure caused by too many locking interfaces.

[0091] According to some embodiments of this application, please refer to Figure 6 and Figure 7 The second annular body 122 also has a third connection hole 1222 , the top cover 130 has a fourth connection hole 132 corresponding to the third connection hole 1222 , and the battery 10 further includes a second connector 160 , which connects the top cover 130 and the second annular body 122 through the third connection hole 1222 and the fourth connection hole 132 .

[0092] The top cover 130 and the second annular body 122 can also be connected by adding connecting parts. The edge of the top cover 130 is a connecting flange surface. The second annular body 122 serves as the connecting flange surface of the heat exchange component 120. The edge of the top cover 130 is a connecting flange surface that fits the connecting flange surface of the heat exchange component 120. A fourth connecting hole 132 is arranged on the top cover 130, and a third connecting hole 1222 is arranged on the second annular body 122. The position of the fourth connecting hole 132 corresponds to the position of the third connecting hole 1222 one by one. The second connecting part 160 passes through the fourth connecting hole 132 and the third connecting hole 1222 to connect the top cover 130 and the second annular body 122.

[0093] For example, the fourth connection hole 132 and the third connection hole 1222 are through holes, and a through hole is also provided on the box body 110, and the three are connected by bolts and nuts; for example, the fourth connection hole 132 and the third connection hole 1222 are through holes, and an avoidance groove is provided on the box body 110, and only the fourth connection hole 132 and the third connection hole 1222 are connected by bolts and nuts.

[0094] By setting corresponding connecting holes on the second annular body 122 and the top cover 130, and connecting the two by passing the second connecting member 160 through the connecting holes, the structure is simple and the operation is convenient, which facilitates the installation and connection of the second annular body 122 and the top cover 130, and also facilitates the subsequent disassembly and maintenance, thereby improving operability.

[0095] According to some embodiments of this application, please refer to Figure 5 and Figure 7 The second annular body 122 has a plurality of second connection holes 1221 and a plurality of third connection holes 1222 , and the plurality of second connection holes 1221 and the plurality of third connection holes 1222 both surround the heat exchange body 121 .

[0096] The second connection hole 1221 of the second annular body 122 is used to connect with the box body 110, and the third connection hole 1222 of the second annular body 122 is used to connect with the top cover 130. The multiple second connection holes 1221 and the multiple third connection holes 1222 all surround the heat exchange body 121, that is, the edge of the heat exchange component 120 is connected to the top cover 130 and the box body 110 in a surrounding manner. The surrounding includes a uniform interval arrangement and can also be a non-uniform interval setting, which can be determined according to actual needs.

[0097] By arranging a plurality of second connection holes 1221 and third connection holes 1222 on the second annular body 122, and surrounding the second connection holes 1221 and the third connection holes 1222 around the heat exchange body 121, the connection force is made more uniform, the stability of the connection between the second annular body 122 and the box body 110 and the top cover 130 is improved, and the sealing effect can also be improved.

[0098] According to some embodiments of this application, please refer to Figure 5 , a plurality of second connection holes 1221 and a plurality of third connection holes 1222 are arranged alternately and spaced apart.

[0099] A plurality of second connection holes 1221 and a plurality of third connection holes 1222 are arranged alternately at intervals to achieve alternating connection between the heat exchange assembly 120 and the box body 110 and the top cover 130. The alternating intervals include uniform intervals and non-uniform intervals, and the specific interval values ​​can be determined according to requirements. For example, when the battery box 100 is a cylindrical box, a uniform interval setting can be adopted, and the interval between two adjacent second connection holes 1221 is 80 mm, and the interval between two adjacent third connection holes 1222 is also 80 mm. For example, when the battery box 100 is a cubic box, a non-uniform interval setting can be adopted, and the density of the connection holes close to the square corners is greater than the density of the connection holes far from the square corners.

[0100] By arranging the second connection holes 1221 and the third connection holes 1222 in an alternating manner, the heat exchange component 120 is alternately connected to the box body 110 and the top cover 130, respectively, further improving the stability and sealing of the connection between the heat exchange component 120 and the box body 110 and the top cover 130.

[0101] According to some embodiments of the present application, the number of the second connection holes 1221 is less than the number of the third connection holes 1222 , and the third connection holes 1222 are located on both sides of the second connection hole 1221 .

[0102] The heat exchange component 120 is connected to the box body 110 through the second connecting hole 1221, and the heat exchange component 120 is connected to the top cover 130 through the third connecting hole 1222. The requirements for connecting the heat exchange component 120 to the box body 110 and the top cover 130 are different, so the number of second connecting holes 1221 and the third connecting holes 1222 are also different. For example, if it is necessary to strengthen the connection between the heat exchange component 120 and the top cover 130, the number of third connecting holes 1222 is greater than the number of second connecting holes 1221. The specific arrangement is not limited. For example, two third connecting holes 1222 are arranged between two adjacent second connecting holes 1221, that is, one second connecting hole 1221 and two third connecting holes 1222 are arranged in a cycle in sequence.

[0103] By further considering the need to strengthen the seal between the heat exchange component 120 and the top cover 130, only a fixed connection is required between the heat exchange component 120 and the box body 110, and the number of second connection holes 1221 is less than the number of third connection holes 1222. While meeting the connection requirements of the heat exchange component 120 and the box body 110, the number of connectors between the heat exchange component 120 and the box body 110 is appropriately reduced, which facilitates operation and quick installation, and improves assembly efficiency. At the same time, there are third connection holes 1222 on both sides of the second connection hole 1221, so as to realize the staggered connection between the heat exchange component 120 and the top cover 130 and the box body 110, thereby improving the connection stability.

[0104] According to some embodiments of this application, please refer to Figure 4When the heat exchange body 121 has the second accommodating cavity 1211 , a sealing gasket 140 is provided between the second annular body 122 and the top cover 130 .

[0105] The heat exchange body 121 is located in the first accommodating chamber 113. The heat exchange body 121 may include a heat exchange bottom wall and a heat exchange side wall. The heat exchange bottom wall and the heat exchange side wall surround and form a second accommodating chamber 1211. The second accommodating chamber 1211 can be used to accommodate the battery cell 200. Therefore, the heat exchange assembly 120 and the top cover 130 are combined to form a space for accommodating the battery cell 200. The heat exchange bottom wall of the heat exchange body 121 is located at the bottom of the battery cell 200, and the heat exchange of the battery cell 200 is achieved through the bottom of the battery cell 200. By arranging a sealing gasket 140 between the second annular body 122 and the top cover 130, the sealing performance between the heat exchange assembly 120 and the top cover 130 is improved.

[0106] By adding a sealing gasket 140 between the second annular body 122 and the top cover 130 , the sealing performance between the heat exchange component 120 and the top cover 130 is improved.

[0107] According to some embodiments of this application, please refer to Figure 8 , Figure 8 for Figure 6 In the partially enlarged schematic diagram of part B, the shortest distance d2 from the second connection hole 1221 to the side wall of the heat exchange body 121 is greater than the shortest distance d1 from the third connection hole 1222 to the side wall of the heat exchange body 121 .

[0108] The second connecting hole 1221 is used to connect to the box body 110, and the third connecting hole 1222 is used to connect to the top cover 130. A sealing gasket 140 is laid between the second connecting hole 1221 and the side wall of the heat exchange body 121. The shortest distance between the third connecting hole 1222 and the side wall of the heat exchange body 121 is the width that can lay the sealing gasket 140. The shortest distance from the second connecting hole 1221 to the side wall of the heat exchange body 121 is d2, and the shortest distance from the third connecting hole 1222 to the side wall of the heat exchange body 121 is d1. d2 is greater than d1. It can be understood that the second connecting hole 1221 is farther away from the heat exchange body 121 than the third connecting hole 1222.

[0109] Taking into account that the setting of the avoidance opening 131 of the top cover 130 may affect the sealing between the top cover 130 and the heat exchange assembly 120, in order to minimize the influence of the avoidance opening 131, the second connecting hole 1221 and the third connecting hole 1222 are arranged in a staggered manner so that the second connecting hole 1221 is farther away from the side wall of the heat exchange body 121 than the third connecting hole 1222, so that the avoidance opening 131 is correspondingly away from the side wall of the heat exchange body 121, which facilitates the arrangement of the sealing gasket 140 between the side wall of the heat exchange body 121 and the third connecting hole 1222.

[0110] According to some embodiments of this application, please refer to Figure 8 , the shortest distance d2 from the third connecting hole 1222 to the side wall of the heat exchange body 121 is greater than or equal to 8 mm and less than or equal to 25 mm.

[0111] The shortest distance d2 from the third connecting hole 1222 to the side wall of the heat exchange body 121 is greater than or equal to 8 mm and less than or equal to 25 mm, that is, the width of the sealing gasket 140 that can be laid between the third connecting hole 1222 and the side wall of the heat exchange body 121 can be greater than or equal to 8 mm and less than or equal to 25 mm. For example, d2 can be 10 mm, 15 mm, 20 mm, etc.

[0112] A sealing gasket 140 is laid between the third connecting hole 1222 and the side wall of the heat exchange body 121. The shortest distance from the third connecting hole 1222 to the side wall of the heat exchange body 121 is greater than or equal to 8 mm, so that there is enough space between the third connecting hole 1222 and the side wall of the heat exchange body 121 to lay the sealing gasket 140. At the same time, the shortest distance from the third connecting hole 1222 to the side wall of the heat exchange body 121 is less than or equal to 25 mm, so that the width of the second annular body 122 is not too large, resulting in an excessively large volume of the battery.

[0113] According to some embodiments of this application, please refer to Figure 7 The first annular body 112 is provided with a through hole 114 , the through hole 114 is connected to the third connecting hole 1222 , and the opening size of the through hole 114 is larger than the opening size of the third connecting hole 1222 .

[0114] The first annular body 112 is provided with a through hole 114, which is connected to the third connection hole 1222, providing space for the installation and connection of the second connection member 160. The specific structure and shape are not limited. The through hole 114 can be a square through hole, a circular through hole, or a through hole of other shapes. It should be noted that the opening size of the through hole 114 should be larger than the opening size of the third connection hole 1222. For example, the through hole 114 is a circular through hole, and the second connection member 160 is a rivet bolt, which passes through the fourth connection hole 132 of the top cover 130 and the third connection hole 1222 on the heat exchange assembly 120 in sequence. The end of the rivet bolt is located in the through hole 114 of the first annular body 112 of the box body 110. Tighten the rivet bolt to connect and fix the top cover 130 and the heat exchange assembly 120.

[0115] By setting a through hole 114 in the first annular body 112, an installation space is provided for the second connecting member 160 to connect the second annular body 122 and the top cover 130, which is convenient for operation and installation. At the same time, the second connecting member 160 is used to connect only the second annular body 122 and the top cover 130. Compared with the second connecting member 160 connecting the top cover 130, the first annular body 112 and the second annular body 122, the connection stability is better and the possibility of connection failure caused by too many locking interfaces is reduced.

[0116] According to some embodiments of this application, please refer to Fig. 9 The box body 110 is provided with a positioning boss 115 , the heat exchange assembly 120 is provided with a positioning hole 1223 , and the positioning boss 115 passes through the positioning hole 1223 .

[0117] The positioning boss 115 is a raised structure on the box body 110, and the positioning hole 1223 is a through hole on the heat exchange component 120. The specific shape, structure, quantity and position of the positioning boss 115 are not limited, and the requirements for matching with the positioning hole 1223 can be met. For example, the positioning boss 115 is a cylindrical structure, and the positioning hole 1223 is a circular through hole.

[0118] By providing a positioning boss 115 on the box body 110 and providing a corresponding positioning hole 1223 on the heat exchange assembly 120, the heat exchange assembly 120 can be quickly installed and positioned when installing the heat exchange assembly 120, thereby improving the installation efficiency. At the same time, the positioning boss 115 can also play a positioning role in the installation of the sealing gasket 140.

[0119] An embodiment of the present application provides an electrical device, which includes the battery 10 in any one of the above embodiments.

[0120] According to some embodiments of the present application, the battery 10 includes a battery box 100 and a battery cell 200, wherein the battery box 100 includes a box body 110, a heat exchange assembly 120, and a top cover 130. The box body 110 includes a first basin body 111 and a first annular body 112, wherein the first basin body 111 has a first accommodating cavity 113, the first annular body 112 is connected to the side wall of the first basin body 111, and the first annular body 112 surrounds the opening of the first accommodating cavity 113.

[0121] The heat exchange assembly 120 includes a heat exchange body 121 and a second annular body 122. The heat exchange body 121 is located in the first accommodating cavity 113 and has a second accommodating cavity 1211. The battery cell 200 is located in the second accommodating cavity 1211 and performs heat exchange with the heat exchange assembly 120. The side wall of the heat exchange body 121 is in contact with the side wall of the first basin body 111, and the bottom wall of the heat exchange body 121 is in contact with the bottom wall of the first basin body 111. The second annular body 122 is connected to the side wall of the heat exchange body 121, and the second annular body 122 surrounds the opening of the second accommodating cavity 1211.

[0122] The top cover 130 covers the opening of the first accommodating cavity 113 . The second annular body 122 is located between the top cover 130 and the first annular body 112 . The second annular body 122 is connected to the first annular body 112 and the top cover respectively.

[0123] The first annular body 112 has a first connecting hole 1121, and an insert nut is installed in the first connecting hole 1121. The second annular body 122 has a second connecting hole 1221 corresponding to the first connecting hole 1121. The top cover 130 has an avoidance opening 131 connected to the second connecting hole 1221. The first connecting member 150 passes through the avoidance opening 131 and the second connecting hole 1221 and is connected to the insert nut in the first connecting hole 1121.

[0124] The second annular body 122 also has a third connecting hole 1222, the top cover 130 has a fourth connecting hole 132 corresponding to the third connecting hole 1222, the first annular body 112 is provided with a through hole 114 connected to the third connecting hole 1222, and the second connecting member 160 passes through the fourth connecting hole 132 and the third connecting hole 1222 in sequence and enters the through hole 114 to connect the top cover 130 with the heat exchange assembly 120.

[0125] The second connection holes 1221 and the third connection holes 1222 on the second annular body 122 surround the heat exchange body 121 and are arranged alternately and spaced apart, and the shortest distance from the second connection hole 1221 to the side wall of the heat exchange body 121 is greater than the shortest distance from the third connection hole 1222 to the side wall of the heat exchange body 121. A sealing gasket 140 is laid between the second connection hole 1221 and the side wall of the heat exchange body 121, and the shortest distance from the third connection hole 1222 to the side wall of the heat exchange body 121 is greater than or equal to 8 mm and less than or equal to 25 mm, that is, the width of the sealing gasket 140 is greater than or equal to 8 mm and less than or equal to 25 mm.

[0126] The housing 110 is provided with a positioning boss 115 , and the heat exchange assembly 120 is provided with a positioning hole 1223 , through which the positioning boss 115 passes.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; 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 all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include: The box body (110) comprises a first basin body (111) and a first annular body (112), wherein the first basin body (111) has a first accommodating cavity (113), the first annular body (112) is connected to a side wall of the first basin body (111), and the first annular body (112) surrounds an opening of the first accommodating cavity (113); A heat exchange assembly (120), comprising a heat exchange body (121) and a second annular body (122), wherein the second annular body (122) surrounds the heat exchange body (121) and is connected to the heat exchange body (121); A battery cell (200) located in the first accommodating cavity (113) and performing heat exchange with the heat exchange component (120); Wherein, the first annular body (112) is connected to the second annular body (122).

2. The battery according to claim 1, characterized in that The heat exchange body (121) is located in the first accommodating cavity (113), the heat exchange body (121) has a second accommodating cavity (1211), and the battery cell (200) is located in the second accommodating cavity (1211); the second annular body (122) is connected to the side wall of the heat exchange body (121), and the second annular body (122) surrounds the opening of the second accommodating cavity (1211).

3. The battery according to claim 2, characterized in that The side wall of the heat exchange body (121) is in contact with the side wall of the first basin (111), the bottom wall of the heat exchange body (121) is in contact with the bottom wall of the first basin (111), and the heat exchange flow channel of the heat exchange assembly (120) is located on the bottom wall of the heat exchange body (121).

4. The battery according to any one of claims 1 to 3, characterized in that The first annular body (112) has a first connection hole (1121), the second annular body (122) has a second connection hole (1221) corresponding one-to-one to the first connection hole (1121), and the battery further comprises a first connection member (150), the first connection member (150) connecting the first annular body (112) and the second annular body (122) via the first connection hole (1121) and the second connection hole (1221).

5. The battery according to claim 4, characterized in that The first annular body (112) has an insert nut (116), the insert nut (116) is fixed in the first connecting hole (1121), and the first connecting member (150) passes through the second connecting hole (1221) and is connected to the insert nut (116).

6. The battery according to claim 4, characterized in that The battery further comprises: a top cover (130), the top cover (130) covering the opening of the first accommodating cavity (113), the second annular body (122) being located between the top cover (130) and the first annular body (112), and the top cover (130) being connected to the second annular body (122).

7. The battery according to claim 6, characterized in that The top cover (130) has a relief opening (131), the relief opening (131) being in communication with the second connection hole (1221), and the first connection member (150) passes through the relief opening (131) to connect the first annular body (112) and the second annular body (122).

8. The battery according to claim 6, characterized in that The second annular body (122) also has a third connection hole (1222), the top cover (130) has a fourth connection hole (132) corresponding one-to-one to the third connection hole (1222), and the battery also includes a second connection member (160), and the second connection member (160) connects the top cover (130) and the second annular body (122) through the third connection hole (1222) and the fourth connection hole (132).

9. The battery according to claim 8, characterized in that The second annular body (122) has a plurality of the second connection holes (1221) and a plurality of the third connection holes (1222), and the plurality of the second connection holes (1221) and the plurality of the third connection holes (1222) all surround the heat exchange body (121).

10. The battery according to claim 9, characterized in that The plurality of the second connection holes (1221) and the plurality of the third connection holes (1222) are arranged alternately and at intervals.

11. The battery according to claim 9, characterized in that The number of the second connection holes (1221) is less than the number of the third connection holes (1222), and the third connection holes (1222) are located on both sides of the second connection holes (1221).

12. The battery according to claim 8, characterized in that When the heat exchange body (121) has a second accommodating cavity (1211), a sealing gasket (140) is provided between the second annular body (122) and the top cover (130).

13. The battery according to claim 12, characterized in that The shortest distance from the second connection hole (1221) to the side wall of the heat exchange body (121) is greater than the shortest distance from the third connection hole (1222) to the side wall of the heat exchange body (121).

14. The battery according to claim 13, characterized in that The shortest distance from the third connecting hole (1222) to the side wall of the heat exchange body (121) is greater than or equal to 8 mm and less than or equal to 25 mm.

15. The battery according to any one of claims 8 to 14, characterized in that The first annular body (112) is provided with a through hole (114), the through hole (114) is connected to the third connecting hole (1222), and the opening size of the through hole (114) is larger than the opening size of the third connecting hole (1222).

16. The battery according to any one of claims 1 to 3, characterized in that The box body (110) is provided with a positioning boss (115), the heat exchange component (120) is provided with a positioning hole (1223), and the positioning boss (115) passes through the positioning hole (1223).

17. An electrical device, characterized in that: A battery comprising the battery of any one of claims 1 to 16, wherein the battery is used to provide electrical energy.

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