Battery, heat exchange assembly and electric device

Abstract

The utility model discloses a battery, a heat exchange assembly and an electric device. The battery comprises a box body, a cylindrical battery monomer, a square battery monomer and a heat exchange assembly, and the cylindrical battery monomers and the square battery monomers are arranged in the box body. The heat exchange assembly is arranged in the box body, a heat exchange flow channel is arranged in the heat exchange assembly, and the surface of one side of the heat exchange assembly is concaved inwards to form an arc heat exchange face. And the arc heat exchange surfaces are at least partially attached to the side surfaces of the cylindrical battery monomers so as to perform heat exchange on the cylindrical battery monomers. The box body is used for accommodating the cylindrical battery monomers and the square battery monomers, the internal space of the box body is fully utilized, the space utilization rate is improved, and the battery energy density is improved. Moreover, the heat exchange assemblies with the arc-shaped heat exchange surfaces are arranged in the heat exchange assemblies, so that the cylindrical battery monomers can be limited while heat exchange is performed on the cylindrical battery monomers, and the heat exchange efficiency and the assembly efficiency of the cylindrical battery monomers are improved.

Description

Technical Field

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

[0002] Battery cells are widely used in electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, and energy storage systems, etc. Battery cells can include nickel-cadmium battery cells, nickel-hydrogen battery cells, lithium-ion battery cells, sodium-ion battery cells, and secondary alkaline zinc-manganese battery cells, etc.

[0003] At present, how to improve the heat exchange performance of batteries and improve the stability of battery operation is also one of the research issues in this field. Utility Model Content

[0004] In view of the above problems, the present application provides a battery, a heat exchange component and an electrical device, which can effectively utilize the internal space of the battery, increase the battery energy density, and improve the heat exchange efficiency of the heat exchange component.

[0005] In the first aspect, the present application provides a battery, including a box, a cylindrical battery cell, a square battery cell and a heat exchange assembly. The cylindrical battery cell and the square battery cell are both arranged in the box. The heat exchange assembly is arranged in the box, and a heat exchange flow channel is arranged in the heat exchange assembly. One side surface of the heat exchange assembly is concave to form an arc heat exchange surface, and the arc heat exchange surface is at least partially in contact with the side surface of the cylindrical battery cell to exchange heat with the cylindrical battery cell.

[0006] In the technical solution of the embodiment of the present application, the box is used to accommodate cylindrical battery cells and square battery cells, making full use of the internal space of the box, improving space utilization, and improving battery energy density. In addition, a heat exchange component with an arc-shaped heat exchange surface is provided in the heat exchange component to exchange heat for the cylindrical battery cells, and at the same time, the cylindrical battery cells can be limited, thereby improving the heat exchange efficiency and assembly efficiency of the cylindrical battery cells.

[0007] In some embodiments, a heat exchange plane is provided on the side of the heat exchange assembly away from the arc heat exchange surface, and the square battery cell is provided between the heat exchange plane and the box body, and the heat exchange plane is used to exchange heat for the square battery cell. In the above structure, the heat exchange efficiency of the square battery cell is improved by arranging the heat exchange plane to fit the square battery cell.

[0008] In some embodiments, the number of heat exchange components is two, and the two heat exchange components are arranged on both sides of the cylindrical battery cell. The above technical solution, by arranging heat exchange components on both sides of the cylindrical battery, can increase the heat exchange area of ​​the cylindrical battery cell and improve the heat exchange efficiency of the cylindrical battery cell.

[0009] In some embodiments, the angle corresponding to the arc surface of the arc heat exchange surface is less than or equal to 180°. In the above structure, by reducing the curvature of the arc heat exchange surface, the probability of interference between the two relatively arranged arc heat exchange surfaces is reduced, the space occupied by the heat exchange component is reduced, the rationality of the internal space utilization of the box is improved, and the energy density of the battery is improved.

[0010] In some embodiments, there are multiple arc heat exchange surfaces, and two adjacent arc heat exchange surfaces are connected by a connecting portion, and the connecting portion is used to extend between two adjacent cylindrical battery cells. In the above structure, multiple arc heat exchange surfaces are connected by setting a connecting portion, and the connecting portion can extend into the gap between two cylindrical battery cells, which further increases the heat exchange area of ​​the cylindrical battery cell and improves the heat exchange efficiency of the cylindrical battery cell.

[0011] In some embodiments, the number of square battery cells is two, and the two square battery cells correspond to two heat exchange components. In the above structure, by setting two square battery cells, the heat exchange space of the heat exchange component is fully utilized, the internal space of the box is reasonably utilized, and the energy density is improved.

[0012] In some embodiments, there are multiple cylindrical battery cells, multiple cylindrical battery cells are arranged along the first direction, two heat exchange components are arranged along the second direction, the second direction intersects with the first direction, and multiple arc heat exchange surfaces are arranged on the heat exchange component, each arc heat exchange surface is arranged corresponding to a cylindrical battery cell, and multiple arc heat exchange surfaces are arranged in sequence along the first direction at uniform intervals. In the above technical solution, the cylindrical battery cells and the square battery cells are respectively arranged on both sides of the heat exchange component, which improves the heat exchange efficiency of the heat exchange component, improves the positioning accuracy of the cylindrical battery cells and the square battery cells, and improves the internal space utilization of the box.

[0013] In some embodiments, the heat exchange component includes a containment shell and a heat exchange baffle. The containment shell has a heat exchange cavity, which is used to contain a heat exchange medium. The containment shell includes a first wall portion and a second wall portion that are arranged opposite to each other. The first wall portion is concave on the side away from the heat exchange cavity to form a circular arc heat exchange surface. The heat exchange baffle is arranged in the heat exchange cavity, and the heat exchange baffle is connected between the first wall portion and the second wall portion to form a heat exchange flow channel in the heat exchange cavity. In the above structure, a stable space is provided for the heat exchange medium by arranging the containment shell, the second wall portion is concave to form a circular arc heat exchange surface, the first wall portion can be a heat exchange plane for heat exchange of square batteries, and a heat exchange baffle is arranged between the first wall portion and the second wall portion, which can extend the flow path of the heat exchange medium in the heat exchange cavity, ensure that both the first wall portion and the second wall portion can have a good heat exchange effect, and improve the heat exchange efficiency of the heat exchange component.

[0014] In some embodiments, the containment shell further includes a top wall and a bottom wall. The top wall is connected to the first wall portion and the second wall portion, the bottom wall is connected to the first wall portion and the second wall portion, and the bottom wall is arranged opposite to the top wall. The end of the heat exchange baffle along the third direction is connected to the bottom wall or the top wall, and the third direction intersects with the plane where the first direction and the second direction are located. Connecting the heat exchange baffle to the top wall or the bottom wall facilitates the arrangement of the heat exchange baffle and improves the manufacturing efficiency of the heat exchange assembly.

[0015] In some embodiments, there are multiple heat exchange baffles, and of any two adjacent heat exchange baffles, one is connected to the bottom wall and the other is connected to the top wall. The two heat exchange baffles are staggered to further extend the flow path of the heat exchange medium and improve the heat exchange efficiency.

[0016] On the second aspect, the present application provides a heat exchange component for being arranged between a cylindrical battery cell and a square battery cell. A heat exchange flow channel is arranged in the heat exchange component. The heat exchange component has a first surface and a second surface. The first surface is concave to form an arc heat exchange surface. The arc heat exchange surface is used to fit with the side of the cylindrical battery cell to exchange heat with the cylindrical battery cell. The second surface is used to fit with the square battery cell to exchange heat with the square battery cell. In the above structure, an arc heat exchange surface and a heat exchange plane are arranged in the heat exchange component, which can simultaneously exchange heat for the cylindrical battery cell and the square battery cell, thereby improving the heat exchange efficiency. In addition, the cylindrical battery cell can be limited, thereby improving the assembly efficiency of the cylindrical battery cell. Furthermore, the above structure can be filled between the cylindrical battery cell and the square battery cell, making full use of the space and improving the energy density of the battery.

[0017] In a third aspect, the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0018] 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

[0019] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0020] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the exploded structure of a battery according to an embodiment of the present application;

[0022] Figure 3This is a schematic structural diagram of a square battery cell according to an embodiment of the present application;

[0023] Figure 4 This is a schematic structural diagram of a cylindrical battery cell according to an embodiment of the present application;

[0024] Figure 5 This is a schematic diagram of the structure of a heat exchange component according to an embodiment of the present application;

[0025] Figure 6 This is a schematic structural diagram of a heat exchange assembly and a cylindrical battery cell according to an embodiment of the present application;

[0026] Figure 7 This is a schematic structural diagram of a heat exchange component according to another embodiment of the present application;

[0027] Figure 8 This is a schematic diagram of the distribution of heat exchange baffles according to an embodiment of the present application.

[0028] DETAILED DESCRIPTION OF REFERENCE NUMERALS

[0029] 1. Vehicle; 2. Battery; 10. Electrode assembly; 20. Shell; 24. Pressure relief mechanism; 30. End cover; 40. Shell; 3. Controller; 4. Motor; 5. Box; 51. First part; 52. Second part; 53. Accommodation space; 6. Cylindrical battery cell; 7. Square battery cell; X, first direction; Y, second direction; Z, third direction; 8. Heat exchange assembly; 801, arc heat exchange surface; 802, heat exchange plane; 803, accommodation shell; 804, heat exchange baffle; 805, heat exchange cavity; 806, first wall; 807, second wall; 808, top wall; 809, bottom wall; 810, side wall. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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).

[0036] 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.

[0037] 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.

[0038] 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.

[0039] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0040] 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 2 is provided inside the vehicle 1, and the battery 2 may be provided at the bottom, the head or the tail of the vehicle 1. The battery 2 may be used to power the vehicle 1, for example, the battery 2 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 3 and a motor 4, and the controller 3 is used to control the battery 2 to power the motor 4, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0041] In some embodiments of the present application, the battery 2 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.

[0042] In some embodiments, the battery 2 may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0043] With the development of battery technology, people have put forward higher requirements on the heat exchange efficiency and energy density of batteries. In order to further improve the energy density of batteries on the basis of improving the heat exchange efficiency of battery cells, an embodiment of the present application provides a battery.

[0044] Please refer to Figure 2 , Figure 2 An exploded view of a battery provided in some embodiments of the present application. The battery includes a housing 5, a cylindrical battery cell 6, a square battery cell 7, and a heat exchange assembly 8. The housing 5 has a receiving space 53, and the cylindrical battery cell 6 and the square battery cell 7 are both arranged in the receiving space 53. A heat exchange flow channel is arranged in the heat exchange assembly 8, and the surface of the heat exchange assembly 8 on one side facing away from the housing 5 is concave to form an arc heat exchange surface 801, and the arc heat exchange surface 801 is at least partially in contact with the side of the cylindrical battery cell 6 to exchange heat with the cylindrical battery cell 6.

[0045] In the technical solution of the embodiment of the present application, the box 5 is used to accommodate the cylindrical battery cell 6 and the square battery cell 7, making full use of the internal space of the box 5, improving the space utilization rate, and improving the energy density of the battery 2. In addition, a heat exchange component 8 having an arc heat exchange surface 801 is provided in the heat exchange component 8 to exchange heat with the cylindrical battery cell 6, and at the same time, the cylindrical battery cell 6 can be limited, thereby improving the heat exchange efficiency and assembly efficiency of the cylindrical battery cell 6.

[0046] The box body 5 can adopt a variety of structures. In some optional embodiments, the box body 5 includes a first part 51 and a second part 52, the first part 51 and the second part 52 cover each other, and the first part 51 and the second part 52 jointly define a storage space 53 for accommodating the square battery cell 7 and the cylindrical battery cell 6. The second part 52 can be a hollow structure with one end open, and the first part 51 can be a plate-like structure, and the first part 51 covers the open side of the second part 52, so that the first part 51 and the second part 52 jointly define the storage space 53; the first part 51 and the second part 52 can also be hollow structures with one side open, and the open side of the first part 51 covers the open side of the second part 52. Of course, the box body 5 formed by the first part 51 and the second part 52 can be a variety of shapes, such as a cylinder, a cuboid, etc.

[0047] In some embodiments, the box 5 can be used as part of the chassis structure of the vehicle 1. For example, part of the box 5 can become at least a part of the floor of the vehicle 1, or part of the box 5 can become at least a part of the cross beam and longitudinal beam of the vehicle 1.

[0048] In the battery, both the square battery cells 7 and the cylindrical battery cells 6 can be multiple. Exemplarily, the multiple square battery cells 7 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple square battery cells 7 are both connected in series and in parallel. The multiple square battery cells 7 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple square battery cells 7 is accommodated in the box 5. Of course, the battery 2 can also be a battery module in which multiple square battery cells 7 are first connected in series, in parallel, or in mixed connection, and the multiple battery modules are then connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box 5. The battery 2 may also include other structures. For example, the battery 2 may also include a busbar component for realizing electrical connection between the multiple square battery cells 7. It can be understood that the cylindrical battery cells 6 can also be connected through the above structure, which will not be elaborated here.

[0049] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of a square battery cell 7 provided in one embodiment of the present application. Figure 3 The square battery cell 7 includes a housing 40, an electrode assembly 10 and other functional components. Figure 4 , which is a schematic diagram of the structure of a cylindrical battery cell 6 provided in one embodiment of the present application. The cylindrical battery cell 6 also includes a housing 40 and an electrode assembly 10 , wherein the electrode assembly 10 is disposed in the housing 40 .

[0050] The housing 40 is provided with a receiving cavity, and the electrode assembly 10 is provided in the housing 40. The electrode assembly 10 includes a main body and a tab extending from the main body. The main body may include a portion of the positive electrode sheet coated with an active material layer, a component of the negative electrode sheet coated with an active material layer, and a separator. The active material in the active material layer is used to react with the electrolyte to achieve charging and discharging.

[0051] The housing 40 is a component for accommodating the electrode assembly 10. The housing 40 can be made of various materials, such as copper, iron, aluminum, steel, and aluminum alloy. The housing 40 can be in various shapes, such as a cylinder, a cuboid, etc. The housing 40 in the exemplary figure is a cylinder.

[0052] Exemplarily, the housing 40 may include an end cap 30 and a shell 20. The end cap 30 refers to a component that covers the opening 21 of the shell 20 to isolate the internal environment of the square battery cell 7 from the external environment. Without limitation, the shape of the end cap 30 may be adapted to the shape of the shell 20 to match the shell 20. Optionally, the end cap 30 may be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 30 is not easily deformed when squeezed and collided, so that the square battery cell 7 can have a higher structural strength and the safety performance can also be improved.

[0053] In some embodiments, the end cap 30 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the square battery cell 7 reaches a threshold value. The material of the end cap 30 may also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this. In some embodiments, an insulating component may also be provided on the inner side of the end cap 30, and the insulating component may be used to isolate the electrical connection components in the housing 20 from the end cap 30 to reduce the risk of short circuit. Exemplarily, the insulating component may be plastic, rubber, etc.

[0054] The housing 20 is a component used to cooperate with the end cap 30 to form the internal environment of the square battery cell 7. The formed internal environment can be used to accommodate the electrode assembly 10, the electrolyte and other components. The housing 20 and the end cap 30 can be independent components, and an opening can be set on the housing 20, and the internal environment of the square battery cell 7 can be formed by covering the opening with the end cap 30.

[0055] In some optional embodiments, the end cap 30 and the shell 20 can also be integrated. Specifically, the end cap 30 and the shell 20 can form a common connection surface before other components are put into the shell. When the interior of the shell 20 needs to be encapsulated, the end cap 30 is covered with the shell 20. The shell 20 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 20 can be determined according to the specific shape and size of the electrode assembly 10. The material of the shell 20 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0056] The electrode assembly 10 is a component in the battery cell where electrochemical reactions occur. Taking the square battery cell 7 as an example, one or more electrode assemblies 10 may be included in the housing 20. The electrode assembly 10 includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the square battery cell 7, active ions (such as lithium ions) are embedded and removed back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow active ions to pass through.

[0057] In some embodiments, the separator is a separator. The present application has no particular restrictions on the type of separator, and any known porous separator with good chemical stability and mechanical stability can be selected. As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic.

[0058] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0059] In some embodiments, the square battery cell 7 and the cylindrical battery 6 also include an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0060] Please refer to the following Figures 2 to 5 , Figure 2 This is a schematic diagram of the exploded structure of a battery according to an embodiment of the present application. Figure 3 This is a schematic diagram of the structure of a square battery cell according to an embodiment of the present application. Figure 4 This is a schematic diagram of the structure of a cylindrical battery cell according to an embodiment of the present application. Figure 5 This is a schematic structural diagram of a heat exchange component according to an embodiment of the present application.

[0061] The embodiment of the present application provides a battery 2, including a box body 5, a cylindrical battery cell 6, a square battery cell 7 and a heat exchange assembly 8, wherein the cylindrical battery cell 6 and the square battery cell 7 are both arranged in the box body 5. The heat exchange assembly 8 is arranged in the box body 5, and a heat exchange flow channel is arranged in the heat exchange assembly 8. One side surface of the heat exchange assembly 8 is concave to form an arc heat exchange surface 801, and the arc heat exchange surface 801 is at least partially in contact with the side surface of the cylindrical battery cell 6 to exchange heat with the cylindrical battery cell 6.

[0062] In the technical solution of the embodiment of the present application, the box 5 is used to accommodate the cylindrical battery cell 6 and the square battery cell 7, making full use of the internal space of the box 5, improving the space utilization rate, and improving the energy density of the battery 2. In addition, a heat exchange component 8 having an arc heat exchange surface 801 is provided in the heat exchange component 8 to exchange heat for the cylindrical battery cell 6, and at the same time, the cylindrical battery cell 6 can be limited, thereby improving the heat exchange efficiency and assembly efficiency of the cylindrical battery cell 6.

[0063] In some embodiments of the present application, a heat exchange plane 802 is provided on the side of the heat exchange assembly 8 away from the arc heat exchange surface 801, and the square battery cell 7 is provided between the heat exchange plane 802 and the box body 5, and the heat exchange plane 802 is used to exchange heat for the square battery cell 7. In the above structure, the heat exchange efficiency of the square battery cell 7 is improved by arranging the heat exchange plane 802 to fit the square battery cell 7.

[0064] like Figure 6 As shown, in some embodiments of the present application, the number of heat exchange components 8 is two, and the two heat exchange components 8 are arranged on both sides of the cylindrical battery cell 6. Exemplarily, the two sides of the cylindrical battery cell 6 can be two opposite sides of the cylinder. The above technical solution, by arranging the heat exchange components 8 on both sides of the cylindrical battery 2, can increase the heat exchange area of ​​the cylindrical battery cell 6 and improve the heat exchange efficiency of the cylindrical battery cell 6.

[0065] In some embodiments of the present application, the angle corresponding to the arc surface of the arc heat exchange surface 801 is less than or equal to 180°. In the above structure, by reducing the curvature of the arc heat exchange surface 801, the probability of interference between the two oppositely arranged arc heat exchange surfaces 801 is reduced, the space occupied by the heat exchange component 8 is reduced, the rationality of the internal space utilization of the box body 5 is improved, and the energy density of the battery 2 is improved.

[0066] In some embodiments of the present application, there are multiple arc heat exchange surfaces 801, and two adjacent arc heat exchange surfaces 801 are connected by a connecting portion, and the connecting portion is used to extend between two adjacent cylindrical battery cells 6. In the above structure, multiple arc heat exchange surfaces 801 are connected by providing a connecting portion, and the connecting portion can extend into the gap between two cylindrical battery cells 6, which further increases the heat exchange area of ​​the cylindrical battery cell 6 and improves the heat exchange efficiency of the cylindrical battery cell 6.

[0067] In some embodiments of the present application, the number of square battery cells 7 is two, and the two square battery cells 7 are respectively provided for two heat exchange components 8. In the above structure, by providing two square battery cells 7, the heat exchange space of the heat exchange component 8 is fully utilized, the internal space of the box body 5 is reasonably utilized, and the energy density is improved.

[0068] In some embodiments of the present application, there are multiple cylindrical battery cells 6, multiple cylindrical battery cells 6 are arranged along the first direction X, two heat exchange components 8 are arranged along the second direction Y, the second direction Y intersects with the first direction X, and the heat exchange component 8 is provided with multiple arc heat exchange surfaces 801, each arc heat exchange surface 801 is arranged corresponding to a cylindrical battery cell 6, and multiple arc heat exchange surfaces 801 are arranged in sequence and evenly spaced along the first direction X. Optionally, the second direction Y is perpendicular to the first direction X. Exemplarily, the first direction X can be the width direction of the square battery cell 7, and the second direction Y can be the thickness direction of the square battery cell 7.

[0069] In the above technical solution, the cylindrical battery cell 6 and the square battery cell 7 are respectively arranged on both sides of the heat exchange component 8, which improves the heat exchange efficiency of the heat exchange component 8, improves the positioning accuracy of the cylindrical battery cell 6 and the square battery 2, and improves the internal space utilization of the box 5.

[0070] like Figure 7 As shown, in some embodiments of the present application, the heat exchange assembly 8 includes a housing 803 and a heat exchange baffle 804. The housing 803 has a heat exchange cavity 805, and the heat exchange cavity 805 is used to accommodate a heat exchange medium. The housing 803 includes a first wall portion 806 and a second wall portion 807 that are arranged opposite to each other. The first wall portion 806 is concave on one side away from the heat exchange cavity 805 to form a circular arc heat exchange surface 801. The heat exchange baffle 804 is arranged in the heat exchange cavity 805, and the heat exchange baffle 804 is connected between the first wall portion 806 and the second wall portion 807 and forms a heat exchange flow channel in the heat exchange cavity 805.

[0071] In the above structure, a accommodating shell 803 is provided to provide a stable space for the heat exchange medium, the second wall portion 807 is concave to form a circular arc heat exchange surface 801, and the first wall portion 806 can be a heat exchange plane 802 for heat exchange of the square battery cell 7. A heat exchange baffle 804 is provided between the first wall portion 806 and the second wall portion 807, which can extend the flow path of the heat exchange medium in the heat exchange cavity 805, thereby ensuring that both the first wall portion 806 and the second wall portion 807 can have a good heat exchange effect, thereby improving the heat exchange efficiency of the heat exchange component 8.

[0072] like Figure 7 as well as Figure 8 As shown, in some embodiments of the present application, the containment shell 803 also includes a top wall 808 and a bottom wall 809. The top wall 808 connects the first wall portion 806 and the second wall portion 807, the bottom wall 809 connects the first wall portion 806 and the second wall portion 807, and the bottom wall 809 is arranged opposite to the top wall 808. Among them, the end of the heat exchange baffle 804 along the third direction Z is connected to the bottom wall 809 or the top wall 808, and the third direction Z intersects with the plane where the first direction X and the second direction Y are located. Connecting the heat exchange baffle 804 to the top wall 808 or the bottom wall 809 facilitates the arrangement of the heat exchange baffle 804 and improves the manufacturing efficiency of the heat exchange assembly 8. Optionally, the third direction Z is perpendicular to the first direction X and the second direction Y. Exemplarily, the third direction Z can be the height direction of the square battery cell 7, or the height direction of the cylindrical battery cell 6.

[0073] In some embodiments of the present application, there are multiple heat exchange baffles 804, and among any two adjacent heat exchange baffles 804, one is connected to the bottom wall 809, and the other is connected to the top wall 808. Exemplarily, the first heat exchange baffle 804 is connected to the bottom wall 809, and a heat exchange flow channel is formed between the heat exchange baffle 804 and the top wall 808 for the heat exchange medium to pass through. The second heat exchange baffle 804 is connected to the top wall 808, and a heat exchange flow channel is formed between the heat exchange baffle 804 and the bottom wall 809 for the heat exchange medium to pass through. When the heat exchange medium passes through the first heat exchange baffle 804 and the second heat exchange baffle 804 in sequence, it flows from the top wall 808 to the bottom wall 809, extending the flow path of the heat exchange medium. The two heat exchange baffles 804 are staggered, which can further extend the flow path of the heat exchange medium and improve the heat exchange efficiency.

[0074] In some optional embodiments, the accommodating shell 803 further includes a side wall 810, the two side walls 810 are arranged opposite to each other along the first direction X, and the top wall 808, the bottom wall 809, the first wall portion 806, and the second wall portion 807 are respectively connected to the side walls 810. The top wall 808, the bottom wall 809, the first wall portion 806, the second wall portion 807, and the two side walls 810 are sealed and connected and together enclose a heat exchange cavity 805.

[0075] like Figure 5 as well as Figure 7 As shown, an embodiment of the present application provides a heat exchange component 8, which is used to be arranged between a cylindrical battery cell 6 and a square battery cell 7. A heat exchange flow channel is provided in the heat exchange component 8. The heat exchange component 8 has a first surface and a second surface. The first surface is concave to form an arc heat exchange surface 801. The arc heat exchange surface 801 is used to fit with the side of the cylindrical battery cell 6 to exchange heat with the cylindrical battery cell 6. The second surface is used to fit with the square battery cell 7 to exchange heat with the square battery cell 7.

[0076] In the above structure, the heat exchange assembly 8 is provided with an arc heat exchange surface 801 and a heat exchange plane 802, which can simultaneously exchange heat for the cylindrical battery cell 6 and the square battery cell 7, thereby improving the heat exchange efficiency. In addition, the cylindrical battery cell 6 can be limited, thereby improving the assembly efficiency of the cylindrical battery cell 6. Furthermore, the above structure can be filled between the cylindrical battery cell 6 and the square battery cell 7, thereby making full use of the space and improving the energy density of the battery 2.

[0077] The embodiment of the present application also provides an electrical device, which includes the battery 2 in the above embodiment or the heat exchange assembly 8 in the above embodiment, and the battery 2 is used to provide electrical energy. The electrical device in the present application is provided with a box 5 for accommodating cylindrical battery cells 6 and square battery cells 7, making full use of the internal space of the box 5, improving space utilization, and improving the energy density of the battery 2. In addition, a heat exchange assembly 8 with an arc heat exchange surface 801 is provided in the heat exchange assembly 8 to exchange heat with the cylindrical battery cell 6, and at the same time, the cylindrical battery cell 6 can be limited, thereby improving the heat exchange efficiency and assembly efficiency of the cylindrical battery cell 6.

[0078] 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 (2), characterized in that: include: Box body (5); A cylindrical battery cell (6) is arranged in the box (5); A square battery cell (7) is arranged in the box (5); A heat exchange component (8) is arranged in the box body (5), a heat exchange flow channel is arranged in the heat exchange component (8), a surface on one side of the heat exchange component (8) is concave to form an arc heat exchange surface (801), and the arc heat exchange surface (801) is at least partially in contact with the side surface of the cylindrical battery cell (6) to perform heat exchange on the cylindrical battery cell (6).

2. The battery (2) according to claim 1, characterized in that A heat exchange plane (802) is provided on the side of the heat exchange component (8) facing away from the arc heat exchange surface (801); the square battery cell (7) is arranged between the heat exchange plane (802) and the box body (5); and the heat exchange plane (802) is used to perform heat exchange on the square battery cell (7).

3. The battery (2) according to claim 1, characterized in that The number of the heat exchange components (8) is two, and the two heat exchange components (8) are arranged oppositely on two sides of the cylindrical battery cell (6).

4. The battery (2) according to claim 3, characterized in that The angle corresponding to the arc surface of the circular arc heat exchange surface (801) is less than or equal to 180°.

5. The battery (2) according to claim 4, characterized in that There are a plurality of circular arc heat exchange surfaces (801), and two adjacent circular arc heat exchange surfaces (801) are connected via a connecting portion, wherein the connecting portion is used to extend between two adjacent cylindrical battery cells (6).

6. The battery (2) according to claim 3, characterized in that The number of the square battery cells (7) is two, and the two square battery cells (7) are respectively arranged corresponding to the two heat exchange components (8).

7. The battery (2) according to any one of claims 3 to 6, characterized in that: The number of the cylindrical battery cells (6) is multiple, the multiple cylindrical battery cells (6) are arranged along a first direction (X), the two heat exchange components (8) are arranged along a second direction (Y), the second direction (Y) intersects with the first direction (X), the heat exchange component (8) is provided with multiple arc heat exchange surfaces (801), each of the arc heat exchange surfaces (801) is arranged corresponding to one of the cylindrical battery cells (6), and the multiple arc heat exchange surfaces (801) are arranged in sequence along the first direction (X) at uniform intervals.

8. The battery (2) according to claim 7, characterized in that The heat exchange component (8) comprises: The accommodating shell (803) has a heat exchange cavity (805), the heat exchange cavity (805) is used to accommodate a heat exchange medium, the accommodating shell (803) comprises a first wall portion (806) and a second wall portion (807) arranged opposite to each other, and the first wall portion (806) is concave on one side away from the heat exchange cavity (805) to form the arc heat exchange surface (801); A heat exchange baffle (804) is disposed in the heat exchange cavity (805); the heat exchange baffle (804) is connected between the first wall portion (806) and the second wall portion (807) and forms a heat exchange flow channel in the heat exchange cavity (805).

9. The battery (2) according to claim 8, characterized in that The containing shell (803) further comprises: A top wall (808) connecting the first wall portion (806) and the second wall portion (807); A bottom wall (809) connected to the first wall portion (806) and the second wall portion (807), the bottom wall (809) being arranged opposite to the top wall (808); The end of the heat exchange baffle (804) along the third direction (Z) is connected to the bottom wall (809) or the top wall (808), and the third direction (Z) intersects with the plane where the first direction (X) and the second direction (Y) are located.

10. The battery (2) according to claim 9, characterized in that The number of the heat exchange baffles (804) is multiple, and among any two adjacent heat exchange baffles (804), one is connected to the bottom wall (809) and the other is connected to the top wall (808).

11. A heat exchange component (8), characterized in that: The heat exchange assembly (8) is used to be arranged between a cylindrical battery cell (6) and a square battery cell (7); a heat exchange flow channel is provided in the heat exchange assembly (8); the heat exchange assembly (8) has a first surface and a second surface; the first surface is concave to form an arc heat exchange surface (801); the arc heat exchange surface (801) is used to fit with the side of the cylindrical battery cell (6) to exchange heat with the cylindrical battery cell (6); the second surface is used to fit with the square battery cell (7) to exchange heat with the square battery cell (7).

12. An electrical device, characterized in that: The electrical device comprises a battery (2) as claimed in any one of claims 1 to 10, and the battery (2) is used to provide electrical energy.

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