Battery, battery assembly method, electrical device and energy storage device

Abstract

The present application provides a battery, a battery assembly method, an electrical device, and an energy storage device, belonging to the technical field of batteries. The battery includes battery cells, a box body, a connection assembly, a first adhesive layer, and a second adhesive layer. The box body includes a box body plate for connecting with the battery cells. The connection assembly includes a first connector and a second connector that are detachably connected. The first adhesive layer is pasted between the battery cell and the first connector, and the second adhesive layer is pasted between the box body plate and the second connector.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery, a battery assembly method, an electric device, and an energy storage device. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection.

[0003] In the energy field, energy storage systems are crucial for stabilizing the supply of renewable energy. Wind and solar power generation are unstable, and energy storage systems help to achieve efficient energy storage and release. Among them, battery technology determines the energy density, cost, and lifespan of energy storage systems. Therefore, battery technology is the core driving force for promoting the development of electric vehicles and energy storage systems.

[0004] In battery technology, the battery cell and the box body for accommodating the battery cell are usually fixedly connected. When rework, repair, etc. are required, it is difficult to separate the battery cell and the box body, and the battery cell and the box body are easily damaged during the disassembly process, which is not conducive to the recycling of parts. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the background art. To this end, an object of the present application is to provide a battery, a battery assembly method, an electric device, and an energy storage device, so as to facilitate the detachable connection between the box body and the battery cell.

[0006] An embodiment of the first aspect of the present application provides a battery, including a battery cell, a box body, a connection assembly, a first adhesive layer, and a second adhesive layer. The box body is used to accommodate the battery cell, and the box body includes a box body plate for connecting with the battery cell. The connection assembly includes a first connecting member and a second connecting member that are detachably connected. The first adhesive layer is located between the first connecting member and the battery cell, and the first connecting member is pasted to the surface of the battery cell facing the box body plate through the first adhesive layer. The second adhesive layer is located between the second connecting member and the box body plate, and the second connecting member is pasted to the surface of the box body plate facing the battery cell through the second adhesive layer.

[0007] In the technical solution of the embodiment of the present application, by making the battery include battery cells, a box body, a connection component, a first adhesive layer, and a second adhesive layer, the first connecting member of the connection component is pasted to the surface of the box body plate facing the battery cells through the first adhesive layer, and the second connecting member of the connection component is pasted to the surface of the box body plate facing the battery cells through the second adhesive layer. Thus, through the detachable connection of the first connecting member and the second connecting member, the detachable connection between the battery cells and the box body is realized. Moreover, the connection component is bonded to the battery cells and the box body plate through the first adhesive layer and the second adhesive layer, and a detachable design between the battery cells and the box body can be realized without changing the structures of the battery cells and the box body, enabling the battery cells and the box body to adopt the existing manufacturing processes, which is beneficial to cost savings.

[0008] In some embodiments, the first connecting member includes a first support layer and a first sub-connecting member. The second connecting member includes a second support layer and a second sub-connecting member. The first support layer includes a first surface and a second surface opposite to each other in the thickness direction. The first surface is bonded to the first adhesive layer, and the first sub-connecting member is disposed on the second surface. The second support layer includes a third surface and a fourth surface opposite to each other in the thickness direction. The third surface is bonded to the second adhesive layer, and the second sub-connecting member is disposed on the fourth surface. Among them, the first sub-connecting member and the second sub-connecting member are snap-connected. In this way, the first support layer can be used to provide a support carrier for the first connecting member, facilitating the processing and manufacturing of the first sub-connecting member, and at the same time realizing the connection between the first sub-connecting member and the first adhesive layer through the first support layer, thereby realizing the connection between the first connecting member and the battery cells. The second support layer is used to provide a support carrier for the second connecting member, facilitating the processing and manufacturing of the second sub-connecting member, and at the same time realizing the connection between the second sub-connecting member and the second adhesive layer through the second support layer, thereby realizing the connection between the second connecting member and the box body plate. By snap-connecting the first sub-connecting member and the second sub-connecting member, the detachable connection between the first connecting member and the second connecting member can be realized.

[0009] In some embodiments, the materials of both the first support layer and the first sub-connecting member are insulating materials. In this way, insulation between the battery cells and the box body plate can be achieved through the first support layer and the first sub-connecting member, which is beneficial to improving the insulation performance of the battery.

[0010] In some embodiments, the materials of both the second support layer and the second sub-connecting member are insulating materials. In this way, insulation between the battery cells and the box body plate can be achieved through the second support layer and the second sub-connecting member, which is beneficial to improving the insulation performance of the battery.

[0011] In some embodiments, one of the first sub-connector and the second sub-connector is configured to have at least one protrusion, and the other of the first sub-connector and the second sub-connector is configured to have at least one receiving portion corresponding to the at least one protrusion. Wherein, the first connector and the second connector are snap-fitted through the at least one protrusion and the at least one receiving portion. In this way, the snap-fitting of the first connector and the second connector is achieved through the mutual cooperation of the protrusion and the receiving portion.

[0012] In some embodiments, the number of the first sub-connectors is multiple and they are arranged at intervals. Any one of the first sub-connectors includes a first snap-fit head and a first connecting portion, and the first snap-fit head is connected to the second surface through the first connecting portion. The first snap-fit head forms a protrusion, and / or the gap between two adjacent first sub-connectors forms a receiving portion. Wherein, the minimum distance between two first snap-fit heads of any two adjacent first sub-connectors in a first direction parallel to the second surface is less than the minimum distance between the corresponding two first connecting portions in the first direction. By forming the protrusion on the first snap-fit head of the first sub-connector to be snap-fitted with the receiving portion in the second sub-connector, the snap-fitting of the first connector and the second connector is achieved. By forming the receiving portion from the gap between two adjacent first sub-connectors to be snap-fitted with the protrusion in the second sub-connector, the snap-fitting of the first connector and the second connector is achieved. The minimum distance between two first snap-fit heads of any two adjacent first sub-connectors in a first direction parallel to the second surface is less than the minimum distance between the corresponding two first connecting portions in the first direction, so that the dimension of the first snap-fit head in the first direction is greater than the dimension of the first connecting portion connected thereto. When the snap-fitting of the first connector and the second connector is achieved, the part of the first snap-fit head extending beyond the first connecting portion connected thereto in the first direction can be used to form a block for the protrusion located in the receiving portion, preventing the protrusion located in the receiving portion formed by the gap between two adjacent first sub-connectors from easily coming out of the receiving portion, and improving the connection reliability of the first connector and the second connector.

[0013] In some embodiments, the multiple first sub-connectors are arranged in an array in a first direction and a second direction. Wherein, the second direction is parallel to the second surface and intersects with the first direction. By arranging the multiple first sub-connectors in an array, when the first connector and the second connector are snap-fitted, multi-point snap-fitting is formed between the first sub-connector and the second sub-connector, improving the connection reliability of the first connector and the second connector.

[0014] In some embodiments, the cross-sectional area of the first snap-fit head parallel to the second surface gradually decreases in a third direction perpendicular to the second surface and away from the first connecting portion. In this way, it is convenient to achieve the snap-fitting of the first connector and the second connector.

[0015] In some embodiments, the number of the second sub-connectors is plural and they are arranged at intervals. Any one of the second sub-connectors includes a second clamping head and a second connecting portion. The second clamping head is connected to the fourth surface through the second connecting portion. The minimum distance in the first direction between two second clamping heads of any two adjacent second sub-connectors is less than the minimum distance in the first direction between the corresponding two second connecting portions. Wherein, the second clamping head is used as a protruding portion to be clamped in the accommodating portion formed by the gap between two adjacent first sub-connectors, and the first clamping head is used as a protruding portion to be clamped in the accommodating portion formed by the gap between two adjacent second sub-connectors. In this way, a plurality of first sub-connectors can be clamped with a plurality of second sub-connectors, which is beneficial to improving the connection reliability between the first connector and the second connector.

[0016] In some embodiments, the first connecting portion is rod-shaped, and the first clamping head is configured to be able to swing by bending deformation of the first connecting portion. In this way, when the first connector and the second connector are clamped, through the bending deformation of the first connecting portion, the first clamping head can enter the accommodating portion formed by the gap between two adjacent second sub-connectors more conveniently. When the first connector and the second connector are disassembled, through the bending deformation of the first connecting portion, the first clamping head can also be disengaged from the accommodating portion formed by the gap between two adjacent second sub-connectors more conveniently. While realizing the detachable connection between the first connector and the second connector, the risk of damaging the first sub-connector when disassembling the first connector and the second connector can be reduced.

[0017] In some embodiments, the second connecting portion is rod-shaped, and the second clamping head is configured to be able to swing by bending deformation of the second connecting portion. In this way, when the first connector and the second connector are clamped, through the bending deformation of the second connecting portion, the second clamping head can enter the accommodating portion formed by the gap between two adjacent first sub-connectors more conveniently. When the first connector and the second connector are disassembled, through the bending deformation of the second connecting portion, the second clamping head can also be disengaged from the accommodating portion formed by the gap between two adjacent first sub-connectors more conveniently. While realizing the detachable connection between the first connector and the second connector, the risk of damaging the second sub-connector when disassembling the first connector and the second connector can be reduced.

[0018] In some embodiments, in the clamped state, the projection of the first clamping head on the second surface overlaps partially with the projection of the adjacent second clamping head, and the projection of the first connecting portion on the second surface is completely staggered from the projection of the adjacent second connecting portion. In this way, the reliable clamping between the first connector and the second connector can be realized by using the first clamping head and the second clamping head, and the orthographic projections of the first connecting portion and the second connecting portion on the second surface can be arranged alternately to reserve corresponding accommodating spaces for the first clamping head and the second clamping head respectively.

[0019] In some embodiments, the cross-sectional area of the second latching head parallel to the fourth surface gradually decreases in a fourth direction perpendicular to the fourth surface and away from the second connecting portion. In this way, when the first connecting member is latched with the second connecting member, the second latching head can conveniently enter the corresponding receiving portion, facilitating the connection between the first connecting member and the second connecting member.

[0020] In some embodiments, along the thickness direction of the connection assembly, the size of the first latching head is smaller than that of the second connecting portion, and the size of the second latching head is smaller than that of the first connecting portion. In this way, after the first connecting member and the second connecting member are latched, the first latching head and the second latching head can move along the thickness direction of the connection assembly in the corresponding receiving portions, thereby providing buffering between the battery cell and the box body in scenarios such as handling the battery, which is beneficial to protecting the battery cell. Moreover, when latching and disassembling the first connecting member and the second connection, it can also provide a swinging space for the first latching head and the second latching head, so as to realize the disassembly of the first connecting member and the second connection.

[0021] In some embodiments, along the thickness direction of the connection assembly, the size difference between the second connecting portion and the first latching head is greater than or equal to 0.15 cm and less than or equal to 0.4 cm; the size difference between the first connecting portion and the second latching head is greater than or equal to 0.15 cm and less than or equal to 0.4 cm. In this way, while providing buffering between the battery cell and the box body, the influence of the connection assembly on the battery size can be reduced.

[0022] In some embodiments, the minimum distance between the two first latching heads of any two adjacent first sub-connecting members in the first direction is greater than or equal to 0.5 mm and less than or equal to 1.5 mm. In some embodiments, the minimum distance between the two second latching heads of any two adjacent second sub-connecting members in the first direction is greater than or equal to 0.5 mm and less than or equal to 1.5 mm. In this way, when the first connecting member and the second connecting member are latched, good connection reliability can be achieved, and at the same time, disassembly can be facilitated.

[0023] In some embodiments, the minimum distance between the two first connecting portions of any two adjacent first sub-connecting members in the first direction is greater than or equal to 1.5 mm and less than or equal to 3.5 mm. In some embodiments, the minimum distance between the two second connecting portions of any two adjacent second sub-connecting members in the first direction is greater than or equal to 1.5 mm and less than or equal to 3.5 mm. In this way, when the first connecting member and the second connecting member are latched, good connection reliability can be achieved, and at the same time, the first connecting member and the second connecting member can be conveniently disassembled, and the damage to the first sub-connecting member and the second sub-connecting member caused by disassembly can be reduced.

[0024] In some embodiments, the connection strength between the first connecting member and the second connecting member is greater than the bonding strength between the first adhesive layer and the battery cell, and greater than the bonding strength between the box body plate and the second adhesive layer. In this way, the first connecting member and the second connecting member can have a relatively reliable connection, so as to prevent problems such as mutual separation between the battery cell and the box body that affect the battery quality in scenarios such as handling the battery.

[0025] In some embodiments, the bonding strength between the first adhesive layer and the battery cell is greater than or equal to 7 MPa, and the bonding strength between the box body plate and the second adhesive layer is greater than or equal to 7 MPa. In this way, the battery cell and the box body can respectively have a reliable connection with the connection assembly.

[0026] In some embodiments, the material of the box body plate is steel or aluminum, and the surface of the box body plate facing the battery cell is directly bonded to the second adhesive layer. Since there is a connection assembly between the box body plate and the battery cell, the insulation between the box body plate and the battery cell can be realized through the connection assembly, and there is no need to provide an insulation coating on the surface of the box body plate, which can save costs while realizing the insulation performance between the box body plate and the battery cell.

[0027] In some embodiments, the surface of the battery cell facing the box body plate has a pasting area. The battery includes an insulating film, the insulating film covers the surface of the battery cell, and the insulating film includes a windowing portion that exposes the pasting area. Among them, the first connecting member is pasted to the pasting area of the battery cell through the first adhesive layer. By providing the insulating film, the battery cell has better insulation performance. By pasting the first adhesive layer to the pasting area exposed by the windowing portion of the insulating film, the connection between the first connecting member and the battery cell is realized, so as to fix the position of the battery cell.

[0028] An embodiment of the second aspect of the present application provides a battery assembly method for assembling the battery in the above embodiments. The assembly method includes providing a battery cell, a box body and a connection assembly; using the first adhesive layer to paste the first connecting member of the connection assembly to the surface of the box body plate of the battery cell facing the box body; using the second adhesive layer to paste the second connecting member of the connection assembly to the surface of the box body plate of the box body facing the battery cell; and clamping the first connecting member and the second connecting member to assemble the battery cell and the box body.

[0029] In the technical solution of the embodiment of the present application, the first connecting member of the connection assembly is pasted to the surface of the box body plate of the battery cell facing the box body through the first adhesive layer, the second connecting member of the connection assembly is pasted to the surface of the box body plate of the box body facing the battery cell through the second adhesive layer, and the first connecting member and the second connecting member are clamped to realize the connection between the battery cell and the box body, so as to realize the assembly of the battery.

[0030] An embodiment of the third 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.

[0031] An embodiment of the fourth aspect of the present application provides an energy storage device, which includes the battery in the above embodiment, and the battery is used for energy storage.

[0032] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application are specifically exemplified below. Description of the Drawings

[0033] In the drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings denote the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed according to the present application and should not be regarded as limiting the scope of the present application.

[0034] Figure 1 Structural schematic diagram of a vehicle for some embodiments of the present application;

[0035] Figure 2 Exploded structural schematic diagram of a battery for some embodiments of the present application;

[0036] Figure 3 Structural schematic diagram of a battery cell for some embodiments of the present application;

[0037] Figure 4 Position schematic diagram of a battery cell, a box body plate and a connection component for some embodiments of the present application;

[0038] Figure 5 Structural schematic diagram of a connection component for some embodiments of the present application;

[0039] Figure 6 Structural schematic diagram of disassembling or snap - connecting a first connecting piece and a second connecting piece for some embodiments of the present application;

[0040] Figure 7 Distribution schematic diagram of a first sub - connecting piece in a corresponding snap - connected state for some embodiments of the present application;

[0041] Figure 8 Flowchart of a battery assembly method for some embodiments of the present application.

[0042] Description of the Reference Numerals:

[0043] Vehicle 1000;

[0044] Battery 100, insulating film 1001, window opening portion 1001a, controller 200, motor 300;

[0045] Cabinet 10, cabinet plate 101, first component 11, second component 12;

[0046] Battery cell 20, pasting area 20a; end cover 21, electrode terminal 21a, housing 22, electrode assembly 23, tab 23a;

[0047] Connection assembly 30, first connector 301, first support layer 3011, first surface 3011a, second surface 3011b, first sub - connector 3012, first clamping head 3012a, first connection portion 3012b, second connector 302, second support layer 3021, third surface 3021a, fourth surface 3021b, second sub - connector 3022, second clamping head 3022a, second connection portion 3022b, protruding portion 303, receiving portion 304, first receiving portion 3041, first sub - receiving portion 3041a, second sub - receiving portion 3041b, second receiving portion 3042, third sub - receiving portion 3042a, fourth sub - receiving portion 3042b;

[0048] First adhesive layer 40, second adhesive layer 50. Detailed implementation manners

[0049] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled 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" and any variations thereof in the specification and claims of this application and the above - mentioned drawings are intended to cover non - exclusive inclusion.

[0051] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary - secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means more than two unless otherwise specifically defined.

[0052] Reference to "embodiments" in this document means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0053] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after.

[0054] In the description of the embodiments of the present application, the term "plural" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0055] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0056] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside 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 specific circumstances.

[0057] Currently, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of batteries, the market demand is also continuously increasing.

[0058] Some components of the battery are fixedly connected. When the battery needs to be reworked or repaired, the fixedly connected components need to be separated. However, when separating the fixedly connected components, it is very easy to cause damage to the components to be separated, which is not conducive to achieving the purpose of recycling.

[0059] For example, in a battery with a CTP structure, the battery cell is integrated into the battery box, and the battery cell and the battery box are fixedly connected. When the battery cell and the box need to be separated for rework or repair, it is difficult to separate the battery cell and the box, and it is easy to damage the battery cell and the box in the process of separation, which is not conducive to the recycling of the battery cell or the box.

[0060] Based on the above considerations, the present application provides a battery, a battery assembly method, an electrical device and an energy storage device, wherein the battery includes a battery cell, a box, a connecting assembly, a first adhesive layer and a second adhesive layer. The box is used to accommodate the battery cell, and the box includes a box plate for connecting to the battery cell. The connecting assembly includes a first connector and a second connector that are detachably connected. The first adhesive layer is located between the first connector and the battery cell, and the first connector is adhered to the surface of the battery cell facing the box plate through the first adhesive layer. The second adhesive layer is located between the second connector and the box plate, and the second connector is adhered to the surface of the box plate facing the battery cell through the second adhesive layer. By using the first adhesive layer to adhere the first connector to the surface of the battery cell facing the box plate, and using the second adhesive layer to adhere the second connector to the surface of the box plate facing the battery cell, the detachable connection between the battery cell and the box can be achieved through the detachable connection of the first connector and the second connector. In addition, the connecting component is bonded to the battery cell and the box plate through the first adhesive layer and the second adhesive layer, so that the battery cell and the box can be detachably designed without changing the structure of the battery cell and the box, so that the battery assembly can be manufactured using the existing preparation process as much as possible, which is conducive to cost saving.

[0061] The battery cells and batteries disclosed in the embodiments of the present application can be used in, but not limited to, electrical devices or energy storage devices such as vehicles, ships or aircraft. A power supply system having the battery cells and batteries disclosed in the present application can be used to form the electrical device, which is conducive to the disassembly and recycling of the battery cells.

[0062] The battery structure and assembly method disclosed in the embodiments of the present application can be used in, but not limited to, CTP batteries. For example, they can also be used in the assembly or disassembly of battery cells and module housings.

[0063] An embodiment of the present application provides an energy storage device that uses batteries for energy storage. The energy storage device may be a container energy storage system, a household energy storage system, or a mobile energy storage device.

[0064] Embodiments of the present application provide an electrical device powered by a battery. The electrical device can be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric aircraft toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0065] For the convenience of description, the following embodiments take a vehicle as an example of an electrical device in an embodiment of the present application for illustration.

[0066] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery 100 is disposed inside the vehicle 1000. The battery 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery 100 can be used to supply power to the vehicle 1000. For example, the battery 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0067] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0068] Please refer to Figures 2 to 5 , Figure 2 which is a schematic exploded view of a battery provided in some embodiments of the present application, Figure 3 which is a schematic structural diagram of a battery cell provided in some embodiments of the present application, Figure 4 which is a schematic position diagram of a battery cell, a box body plate, and a connection component provided in some embodiments of the present application, Figure 5 which is a schematic structural diagram of a connection component provided in some embodiments of the present application.

[0069] Embodiments of the present application provide a battery 100. The battery 100 includes a box body 10, battery cells 20, a connection component 30, a first adhesive layer 40, and a second adhesive layer 50.

[0070] The box body 10 is used to accommodate the battery cells 20. The box body 10 includes a box body plate 101 for connecting to the battery cells 20.

[0071] The connecting component 30 includes a first connecting member 301 and a second connecting member 302 which are detachably connected.

[0072] The first adhesive layer 40 is located between the first connecting member 301 and the battery cell 20, and the first connecting member 301 is adhered to the surface of the battery cell 20 facing the box body plate 101 through the first adhesive layer 40.

[0073] The second adhesive layer 50 is located between the second connecting member 302 and the box body plate 101, and the second connecting member 302 is adhered to the surface of the box body plate 101 facing the battery cell 20 through the second adhesive layer 50.

[0074] The box body 10 is used to provide a receiving space for the battery cells 20 so that the battery cells 20 can be received in the box body 10. The box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first component 11 and a second component 12. The first component 11 and the second component 12 cover each other, and the first component 11 and the second component 12 jointly define a receiving space for accommodating the battery cells 20. The second component 12 can be a hollow structure with one end open, and the first component 11 can be a plate-like structure. The first component 11 covers the open side of the second component 12 so that the first component 11 and the second component 12 jointly define a receiving space; the first component 11 and the second component 12 can also both be hollow structures with one side open, and the open side of the first component 11 covers the open side of the second component 12. Of course, the box body 10 formed by the first component 11 and the second component 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0075] The box body plate 101 is a component of the box body 10 used to connect with the battery cells 20. Among them, the box body plate 101 can be the bottom plate of the box body 10 for carrying the battery cells 20, or it can be a side plate of the box body 10 connected to the bottom plate of the box body 10. The side plate is vertically connected to the bottom plate to form a receiving space for accommodating the battery cells 20. One of the first component 11 and the second component 12 includes the box body plate 101. In the same battery 100, at least one box body plate 101 is included.

[0076] The battery cell 20 refers to the smallest unit that makes up the battery 100. The battery cell 20 includes an end cap 21, a housing 22 and an electrode assembly 23, as Figure 3 shown.

[0077] The end cap 21 refers to a component that covers the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 21 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 20 to have higher structural strength and improved safety performance. In some embodiments, functional components such as electrode terminals 21a can be provided on the end cap 21. The electrode terminals 21a can be used to electrically connect to the electrode assembly for outputting or inputting the electrical energy of the battery cell 20. In some embodiments, a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold can also be provided on the end cap 21. The material of the end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0078] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20, where the formed internal environment can be used to accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 is covered at the opening to form the internal environment of the battery cell 20. Without limitation, the end cap 21 and the housing 22 can also be integrated. Specifically, the end cap 21 and the housing 22 can first form a common connection surface before other components are inserted into the housing, and when it is necessary to encapsulate the inside of the housing 22, the end cap 21 is then covered on the housing 22. The housing 22 can be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0079] The electrode assembly 23 is a component in the battery cell 20 where an electrochemical reaction occurs. The housing 22 can contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or laminating a positive electrode sheet and a negative electrode sheet, and usually a separator is provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials respectively constitute the electrode tabs 23a. The positive electrode tab and the negative electrode tab can be located at one end of the main body together or at both ends of the main body respectively. During the charging and discharging process of the battery 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the electrode tabs are connected to the electrode terminals to form an electric current loop.

[0080] The battery cell 20 can be a secondary battery 100 or a primary battery 100; it can also be a lithium-sulfur battery 100, a sodium-ion battery 100 or a magnesium-ion battery 100, but is not limited thereto. The battery cell 20 can be in a cylindrical shape, a flat shape, a cuboid shape or other shapes, etc.

[0081] The battery 100 can include at least one battery cell 20. When the battery 100 includes a plurality of battery cells 20, the plurality of battery cells 20 can be connected in series, in parallel or in a series-parallel combination. A series-parallel combination means that there are both series and parallel connections among the plurality of battery cells 20. The plurality of battery cells 20 can be directly connected in series, in parallel or in a series-parallel combination together, and then the whole formed by the plurality of battery cells 20 is accommodated in the box body 10. Of course, the battery 100 can also be in the form of a battery 100 module formed by first connecting a plurality of battery cells 20 in series, in parallel or in a series-parallel combination, and then a plurality of battery 100 modules are connected in series, in parallel or in a series-parallel combination to form a whole and are accommodated in the box body 10.

[0082] The connection assembly 30 is a component for realizing the detachable connection between the battery cell 20 and the box body plate 101. The connection assembly 30 includes a first connecting member 301 and a second connecting member 302. The detachable connection between the first connecting member 301 and the second connecting member 302 can realize the detachable connection between the battery cell 20 and the box body plate 101. The detachable connection between the first connecting member 301 and the second connecting member 302 means that the first connecting member 301 and the second connecting member 302 can be conveniently disassembled and assembled when needed (such as in the case of repair, etc.).

[0083] The first adhesive layer 40 is an adhesive layer for realizing the reliable connection between the battery cell 20 and the first connecting member 301 and fixing the relative positions of the battery cell 20 and the first connecting member 301.

[0084] In some embodiments, when the battery 100 includes a plurality of battery cells 20, the plurality of battery cells 20 can be connected to the same first adhesive layer 40, so as to save the preparation process of the battery 100 while enabling the plurality of battery cells 20 to have the same connection reference surface, thereby reducing problems such as possible height differences between the plurality of battery cells 20.

[0085] The second adhesive layer 50 is an adhesive layer for realizing the reliable connection between the box body plate 101 and the second connecting member 302 and fixing the relative positions of the box body plate 101 and the second connecting member 302.

[0086] In some embodiments, the materials of the first adhesive layer 40 and the second adhesive layer 50 may be polyurethane structural adhesives, acrylic structural adhesives, silicone rubbers, epoxy structural adhesives, ultraviolet curing adhesives (UV adhesives), or high-temperature resistant hot melt adhesives. In some embodiments, the materials of the first adhesive layer 40 and the second adhesive layer 50 are the same to reduce the types of products applied to the battery 100 and lower the cost. In some embodiments, the materials of the first adhesive layer 40 and the second adhesive layer 50 may also be selected to be different.

[0087] It should be noted that the battery 100 may further include other structures. For example, the battery 100 may further include a busbar component for realizing electrical connection between multiple battery cells 20.

[0088] By including the battery cell 20, the housing 10, the connection assembly 30, the first adhesive layer 40, and the second adhesive layer 50 in the battery 100, the first connecting member 301 of the connection assembly 30 is pasted to the surface of the cell plate 101 of the battery cell 20 facing the housing 10 through the first adhesive layer 40, and the second connecting member 302 of the connection assembly 30 is pasted to the surface of the cell plate 101 facing the battery cell 20 through the second adhesive layer 50. Thus, through the detachable connection between the first connecting member 301 and the second connecting member 302, the detachable connection between the battery cell 20 and the housing 10 is realized. Moreover, the connection assembly 30 is bonded to the battery cell 20 and the cell plate 101 through the first adhesive layer 40 and the second adhesive layer 50, and a detachable design between the battery cell 20 and the housing 10 can be realized without changing the structures of the battery cell 20 and the housing 10, enabling the battery assembly to mostly follow the existing manufacturing processes, which is beneficial to cost savings.

[0089] Furthermore, the first connecting member 301 and the second connecting member 302 can be connected to the battery cell 20 and the cell plate 101 only through the first adhesive layer 40 and the second adhesive layer 50, enabling the connection assembly 30 to be connected to the battery cell 20 and the cell plate 101 with a relatively simple process, which is beneficial to saving the manufacturing cost of the battery 100.

[0090] Please continue to refer to Figures 5 to 6 , Figure 6 which is a schematic structural diagram of disassembling or clamping the first connecting member and the second connecting member in some embodiments of the present application.

[0091] According to some embodiments of the present application, the first connecting member 301 includes a first support layer 3011 and a first sub-connecting member 3012. The first support layer 3011 includes a first surface 3011a and a second surface 3011b opposite to each other in the thickness direction. The first surface 3011a is bonded to the first adhesive layer 40, and the first sub-connecting member 3012 is disposed on the second surface 3011b.

[0092] The second connecting member 302 includes a second support layer 3021 and a second sub-connecting member 3022. The second support layer 3021 includes a third surface 3021a and a fourth surface 3021b that are opposite to each other in the thickness direction. The third surface 3021a is bonded to the second adhesive layer 50, and the second sub-connecting member 3022 is disposed on the fourth surface 3021b.

[0093] Wherein, the first sub-connecting member 3012 and the second sub-connecting member 3022 are snap-connected.

[0094] The first support layer 3011 is a carrier for providing support to the first sub-connecting member 3012. The first support layer 3011 and the first sub-connecting member 3012 can be integrally formed or made step by step.

[0095] The first surface 3011a of the first support layer 3011 refers to the surface that faces the first adhesive layer 40 and is bonded to the first adhesive layer 40. The second surface 3011b is opposite to the first surface 3011a in the thickness direction of the connecting assembly 30, faces the first sub-connecting member 3012, and is in contact with the first sub-connecting member 3012.

[0096] The first sub-connecting member 3012 is an execution component for realizing the detachable connection between the first connecting member 301 and the second connecting member 302. The first sub-connecting member 3012 is connected to the first adhesive layer 40 through the first support layer 3011.

[0097] The second support layer 3021 is a carrier for providing support to the second sub-connecting member 3022. The second support layer 3021 and the second sub-connecting member 3022 can be integrally formed or made step by step.

[0098] The third surface 3021a of the second support layer 3021 refers to the surface that faces the second adhesive layer 50 and is bonded to the second adhesive layer 50. The fourth surface 3021b is opposite to the third surface 3021a in the thickness direction of the connecting assembly 30, faces the second sub-connecting member 3022, and is in contact with the second sub-connecting member 3022.

[0099] The second sub-connecting member 3022 is an execution component for realizing the detachable connection between the first connecting member 301 and the second connecting member 302. The second sub-connecting member 3022 is connected to the second adhesive layer 50 through the second support layer 3021.

[0100] The connecting component 30 is mutually matched through the first sub-connecting piece 3012 and the second sub-connecting piece 3022 to achieve the detachable connection of the first connecting piece 301 and the second connecting piece 302. That is, the first sub-connecting piece 3012 and the second sub-connecting piece 3022 are connected to achieve the connection of the first connecting piece 301 and the second connecting piece 302. The first sub-connecting piece 3012 and the second sub-connecting piece 3022 are separated to achieve the disassembly of the first connecting piece 301 and the second connecting piece 302. The connection of the first sub-connecting piece 3012 and the second sub-connecting piece 3022 can be realized by the tensile force between the first sub-connecting piece 3012 and the second sub-connecting piece 3022 to achieve the fixed connection between the two. The separation of the first sub-connecting piece 3012 and the second sub-connecting piece 3022 can be achieved by means of an external force.

[0101] The snap connection of the first sub-connecting piece 3012 and the second sub-connecting piece 3022 means that the first sub-connecting piece 3012 and the second sub-connecting piece 3022 can achieve a firm connection and detachable connection with each other through insertion, snapping and other means. The snap connection of the first sub-connecting piece 3012 and the second sub-connecting piece 3022 can include the connection of the first sub-connecting piece 3012 and the second sub-connecting piece 3022 in the form of a snap.

[0102] It should be noted that in some embodiments, the first sub-connecting piece 3012 and the second sub-connecting piece 3022 can also be selected to achieve detachable connection in the form of key connection, pin connection, etc.

[0103] By making the first connecting piece 301 include the first support layer 3011 and the first sub-connecting piece 3012, the first support layer 3011 is used to provide a support carrier for the first connecting piece 301, so as to facilitate the processing and manufacturing of the first sub-connecting piece 3012. At the same time, the connection between the first sub-connecting piece 3012 and the first adhesive layer 40 is realized through the first support layer 3011, so as to realize the connection between the first connecting piece 301 and the battery cell 20. The second support layer 3021 is used to provide a support carrier for the second connecting piece 302, so as to facilitate the processing and manufacturing of the second sub-connecting piece 3022. At the same time, the connection between the second sub-connecting piece 3022 and the second adhesive layer 50 is realized through the second support layer 3021, so as to realize the connection between the second connecting piece 302 and the box body plate 101. Through the snap connection of the first sub-connecting piece 3012 and the second sub-connecting piece 3022, the detachable connection of the first connecting piece 301 and the second connecting piece 302 can be realized.

[0104] In some embodiments, the materials of both the first support layer 3011 and the first sub-connecting piece 3012 are insulating materials.

[0105] In some embodiments, the materials of both the second support layer 3021 and the second sub-connecting piece 3022 are insulating materials.

[0106] The materials of the first support layer 3011 and the first sub-connector 3012 are both insulating materials, which means that the first support layer 3011 and the first sub-connector 3012 are both made of insulating materials so that the first support layer 3011 and the first sub-connector 3012 do not conduct electricity under the allowed voltage.

[0107] The materials of the second support layer 3021 and the second sub-connector 3022 are both insulating materials, which means that the second support layer 3021 and the second sub-connector 3022 are both made of insulating materials so that the second support layer 3021 and the second sub-connector 3022 do not conduct electricity under the allowed voltage.

[0108] In some embodiments, the materials of the first support layer 3011, the second support layer 3021, the first sub-connector 3012, and the second sub-connector 3022 can be respectively selected from one of polyamide, polyurethane, polycarbonate, etc. In some embodiments, the materials of the first support layer 3011, the second support layer 3021, the first sub-connector 3012, and the second sub-connector 3022 are polycarbonate, so as to utilize the mechanical properties of polycarbonate to make both the first connector 301 and the second connector 302 have good tensile strength, bending strength, and compressive strength, facilitating the detachable connection of the first connector 301 and the second connector 302.

[0109] In some embodiments, the materials of the first support layer 3011, the first sub-connector 3012, the second support layer 3021, and the second sub-connector 3022 are all insulating materials.

[0110] By making the materials of the first support layer 3011 and the first sub-connector 3012 both insulating materials, and the materials of the second support layer 3021 and the second sub-connector 3022 both insulating materials, the insulation between the battery cell 20 and the box body plate 101 is achieved, which is beneficial to improving the insulation performance of the battery 100.

[0111] Please continue to refer to Figures 5 to 6 , according to some embodiments of the present application, one of the first sub-connector 3012 and the second sub-connector 3022 is configured to have at least one protrusion 303, and the other of the first sub-connector 3012 and the second sub-connector 3022 is configured to have at least one receiving portion 304 corresponding to the at least one protrusion 303. Wherein, the first connector 301 and the second connector 302 are snap-connected through the at least one protrusion 303 and the at least one receiving portion 304.

[0112] One of the first sub-connector 3012 and the second sub-connector 3022 is configured to have at least one protrusion 303 means that it can be the first sub-connector 3012 having at least one protrusion 303, or it can also mean that the second sub-connector 3022 has at least one protrusion 303. In some embodiments, both the first sub-connector 3012 and the second sub-connector 3022 have at least one protrusion 303.

[0113] The other of the first sub-connector 3012 and the second sub-connector 3022 is configured to have at least one receiving portion 304 corresponding to the at least one protrusion 303 means that it can be the first sub-connector 3012 having at least one receiving portion 304, or it can also mean that the second sub-connector 3022 has at least one receiving portion 304. In some embodiments, both the first sub-connector 3012 and the second sub-connector 3022 have at least one receiving portion 304.

[0114] The protrusion 303 refers to the part of the first sub-connector 3012 and / or the second sub-connector 3022 that can cooperate with the receiving portion 304. The receiving portion 304 refers to the space in the first sub-connector 3012 and / or the second sub-connector 3022 that can receive the corresponding protrusion 303.

[0115] By making the first sub-connector 3012 and the second sub-connector 3022 have the protrusion 303 and the receiving portion 304 that cooperate with each other, the snap connection of the first connector 301 and the second connector 302 is achieved.

[0116] Please continue to refer to Figures 5 to 6 , according to some embodiments of the present application, the number of the first sub-connectors 3012 is multiple and they are arranged at intervals. Any one of the first sub-connectors 3012 includes a first snap head 3012a and a first connecting portion 3012b. The first snap head 3012a is connected to the second surface 3011b through the first connecting portion 3012b. The first snap head 3012a forms the protrusion 303, and / or the gap between any two adjacent first sub-connectors 3012 forms the receiving portion 304. Wherein, the minimum distance between the two first snap heads 3012a of any two adjacent first sub-connectors 3012 along the first direction Dr1 parallel to the second surface 3011b is less than the minimum distance between the corresponding two first connecting portions 3012b along the first direction Dr1.

[0117] The number of the first sub-connectors 3012 is multiple and they are arranged at intervals, which means that the orthographic projections of the multiple first sub-connectors 3012 on the second surface 3011b do not overlap. Each first sub-connector 3012 includes a first clamping head 3012a and a first connecting portion 3012b. The first clamping head 3012a can be used as the protruding portion 303 to cooperate with the accommodating portion 304 in the second connector 302 to realize the clamping of the first connector 301 and the second connector 302. The first connecting portion 3012b is the part of the first sub-connector 3012 for connecting the first support layer 3011 and the first clamping head 3012a. In some embodiments, the gap between two adjacent first sub-connectors 3012 can form the accommodating portion 304 to cooperate with the protruding portion 303 in the second connector 302 to realize the clamping of the first connector 301 and the second connector 302.

[0118] In some embodiments, the first clamping head 3012a and the first connecting portion 3012b are integrally formed, so that the first sub-connector 3012 has better structural strength, and thus when the first connector 301 and the second connector 302 are connected, reliable connection between the first connector 301 and the second connector 302 can be achieved.

[0119] Along the first direction Dr1 parallel to the second surface 3011b, the minimum distance (briefly denoted as the first distance La) between the two first clamping heads 3012a of any two adjacent first sub-connectors 3012 is less than the minimum distance (briefly denoted as the second distance Lb) between the corresponding two first connecting portions 3012b, so that the accommodating portion 304 (briefly denoted as the first accommodating portion 3041) formed by the gap between two adjacent first sub-connectors 3012 can be divided into two mutually communicating parts according to different sizes in the thickness direction of the connecting assembly 30.

[0120] Such as please continue to refer to Figures 5 to 6, the first receiving part 3041 includes a first sub-receiving part 3041a and a second sub-receiving part 3041b that are connected. The first sub-receiving part 3041a is located between the first clamping heads 3012a of two adjacent first sub-connectors 3012, and the second sub-receiving part 3041b is located between the first connecting parts 3012b of two adjacent first sub-connectors 3012. Along the first direction Dr1, the first sub-receiving part 3041a has a first spacing La, and the second sub-receiving part 3041b has a second spacing Lb. The first spacing La is smaller than the second spacing Lb. The first spacing La being smaller than the second spacing Lb causes a part of the first clamping head 3012a to protrude from the first connecting part 3012b along the first direction Dr1, that is, the dimension of the first clamping head 3012a along the first direction Dr1 is greater than the dimension of the first connecting part 3012b connected thereto. In this way, when the first connector 301 and the second connector 302 are clamped, the part of the first clamping head 3012a that extends beyond the first connecting part 3012b connected thereto along the first direction Dr1 can form a block for the protruding part 303 located in the second sub-receiving part 3041b, preventing the protruding part 303 located in the second sub-receiving part 3041b from easily coming out of the second sub-receiving part 3041b, and improving the connection reliability between the first connector 301 and the second connector 302.

[0121] By making the first clamping head 3012a of the first sub-connector 3012 form a protruding part 303 to be clamped with the receiving part 304 in the second sub-connector 3022, the clamping of the first connector 301 and the second connector 302 is realized. By making the gap between two adjacent first sub-connectors 3012 form a receiving part 304 to be clamped with the protruding part in the second sub-connector 3022, the clamping of the first connector 301 and the second connector 302 is realized. The minimum spacing between the two first clamping heads 3012a of any two adjacent first sub-connectors 3012 along the first direction Dr1 parallel to the second surface 3011b is smaller than the minimum spacing of the corresponding two first connecting parts 3012b along the first direction Dr1, so that the dimension of the first clamping head 3012a along the first direction Dr1 is greater than the dimension of the first connecting part 3012b connected thereto. When realizing the clamping of the first connector 301 and the second connector 302, the part of the first clamping head 3012a that extends beyond the first connecting part 3012b connected thereto along the first direction Dr1 can form a block for the protruding part 303 located in the receiving part 304, preventing the protruding part 303 located in the receiving part 304 formed by the gap between two adjacent first sub-connectors 3012 from easily coming out of the receiving part 304, and improving the connection reliability between the first connector 301 and the second connector 302.

[0122] Please continue to refer to Figure 7 , Figure 7Schematic diagram of the distribution of the first sub-connector in the corresponding clamped state of some embodiments of the present application.

[0123] According to some embodiments of the present application, a plurality of first sub-connectors 3012 are arranged in an array along a first direction Dr1 and a second direction Dr2. Among them, the second direction Dr2 is parallel to the second surface 3011b and intersects the first direction Dr1.

[0124] The arrangement of a plurality of first sub-connectors 3012 in an array along the first direction Dr1 and the second direction Dr2 means that while the plurality of first sub-connectors 3012 are arranged along the first direction Dr1, they are also arranged along the second direction Dr2.

[0125] The distribution density of the plurality of first sub-connectors 3012 can be adjusted according to actual needs. For example, in some embodiments, the distribution density of the first sub-connectors 3012 near the boundary of the first support layer 3011 is greater than that of the first sub-connectors 3012 far from the boundary of the first support layer 3011 and near the center of the first support layer 3011, so that when the first connector 301 and the second connector 302 are clamped, the connection strength of the corresponding boundary part of the connection assembly 30 is greater than that of the corresponding central part of the connection assembly 30. In this way, the connection reliability of the corresponding boundary part in the connection assembly 30 is good, but the disassembly difficulty is large; the connection reliability of the corresponding central part in the connection assembly 30 is relatively weak, but the disassembly difficulty is small. Therefore, the reliable connection between the battery cell 20 and the box body plate 101 can be realized by using the corresponding boundary part in the connection assembly 30, and the disassembly of the first connector 301 and the second connector 302 can be accelerated by using the corresponding central part in the connection assembly 30.

[0126] By arranging a plurality of first sub-connectors 3012 in an array, when the first connector 301 and the second connector 302 are clamped, a multi-point clamping is formed by the first sub-connectors 3012 and the second sub-connectors 3022, so as to improve the connection reliability between the first connector 301 and the second connector 302.

[0127] Please continue to refer to Figures 5 to 6 , according to some embodiments of the present application, the cross-sectional area of the first clamping head 3012a parallel to the second surface 3011b gradually decreases along a third direction Dr3 perpendicular to the second surface 3011b and away from the first connection part 3012b.

[0128] The cross-sectional area of the first clamping head 3012a parallel to the second surface 3011b gradually decreases along a third direction perpendicular to the second surface 3011b and away from the first connection part 3012b means that the size of the cross-section of the first clamping head 3012a near the first connection part 3012b is larger than that of its cross-section far from the first connection part 3012b.

[0129] In some embodiments, the first snap head 3012a may be hemispherical. The first snap head 3012a has a first plane and a first curved surface. The first plane of the first snap head 3012a is fixedly connected to the first connecting portion 3012b, and the first curved surface is connected to the first plane and protrudes toward the side away from the first connecting portion 3012b. This facilitates the removal of the first snap head 3012a from the receiving portion 304 or the insertion of the first snap head 3012a into the receiving portion 304 when disassembling and connecting the first connector 301 and the second connector 302, thereby improving the convenience of disassembling and connecting the first connector 301 and the second connector 302. Moreover, when the first connector 301 and the second connector 302 are connected, a reliable connection between the first connector 301 and the second connector 302 can be achieved through the first plane.

[0130] In some embodiments, the first snap head 3012a may also be frustum-shaped. The first snap head 3012a has a first plane, a second plane, and a connecting curved surface connecting the first plane and the second plane. The first plane of the first snap head 3012a is fixedly connected to the first connecting portion 3012b, and the orthographic projection area of the second plane on the second surface 3011b is smaller than the orthographic projection area of the first plane on the second surface 3011b. In this way, when connecting the first connector 301 and the second connector 302, the first snap head 3012a can be conveniently inserted into the corresponding receiving portion 304, thereby improving the convenience of connecting the first connector 301 and the second connector 302. Moreover, when the first snap head 3012a enters the corresponding receiving portion 304, a relatively reliable connection between the first connector 301 and the second connector 302 can be achieved through the first plane.

[0131] In some embodiments, the first snap head 3012a may also be prismatic. The first snap head 3012a has a first plane, a second plane, and a plurality of side surfaces connecting the first plane and the second plane. The first plane of the first snap head 3012a is fixedly connected to the first connecting portion 3012b, and the orthographic projection area of the second plane on the second surface 3011b is smaller than the orthographic projection area of the first plane on the second surface 3011b. In this way, when connecting the first connector 301 and the second connector 302, the first snap head 3012a can be conveniently inserted into the corresponding receiving portion 304, thereby improving the convenience of connecting the first connector 301 and the second connector 302. Moreover, when the first connector 301 and the second connector 302 are connected, a reliable connection between the first connector 301 and the second connector 302 can be achieved through the first plane.

[0132] By making the cross-sectional area of the first clamping head portion 3012a parallel to the second surface 3011b gradually decrease in a third direction Dr3 perpendicular to the second surface 3011b and away from the first connection portion 3012b, when the first connecting member 301 and the second connecting member 302 are connected, the first clamping head portion 3012a can be conveniently introduced into the corresponding accommodating portion 304, so as to conveniently realize the clamping connection between the first connecting member 301 and the second connecting member 302.

[0133] Please continue to refer to Figure 5 , in some embodiments, the number of the second sub-connecting members 3022 is multiple and they are arranged at intervals from each other. Any one of the second sub-connecting members 3022 includes a second clamping head portion 3022a and a second connection portion 3022b. The second clamping head portion 3022a is connected to the fourth surface 3021b through the second connection portion 3022b. The minimum distance between two second clamping head portions 3022a of any two adjacent second sub-connecting members 3022 in the first direction Dr1 is less than the minimum distance between the corresponding two second connection portions 3022b in the first direction. Wherein, the second clamping head portion 3022a serves as the protruding portion 303 and is clamped in the accommodating portion 304 formed by the gap between two adjacent first sub-connecting members 3012, and the first clamping head portion 3012a serves as the protruding portion 303 and is clamped in the accommodating portion 304 formed by the gap between two adjacent second sub-connecting members 3022.

[0134] The fact that the number of the second sub-connecting members 3022 is multiple and they are arranged at intervals from each other means that the orthographic projections of the multiple second sub-connecting members 3022 on the fourth surface 3021b do not overlap. Each second sub-connecting member 3022 includes a second clamping head portion 3022a and a second connection portion 3022b. The second clamping head portion 3022a can serve as the protruding portion 303 and cooperate with the accommodating portion 304 in the first connecting member 301 to realize the clamping connection between the first connecting member 301 and the second connecting member 302. The second connection portion 3022b is the part of the second sub-connecting member 3022 for connecting the second support layer 3021 and the second clamping head portion 3022a. In some embodiments, the gap between two adjacent second sub-connecting members 3022 can also form an accommodating portion 304 to cooperate with the protruding portion 303 in the first connecting member 301 to realize the clamping connection between the first connecting member 301 and the second connecting member 302.

[0135] In some embodiments, the second clamping head portion 3022a and the second connection portion 3022b are integrally formed, so that the second sub-connecting member 3022 has better structural strength, and thus when the first connecting member 301 and the second connecting member 302 are connected, the reliable connection between the first connecting member 301 and the second connecting member 302 can be realized.

[0136] Along a first direction Dr1 parallel to the second surface 3011b, the minimum distance (abbreviated as the third distance Lc) between the two second latching heads 3022a of any two adjacent second sub-connectors 3022 is less than the minimum distance (abbreviated as the fourth distance Ld) between the corresponding two second connecting portions 3022b, so that the accommodating portion 304 (abbreviated as the second accommodating portion 3042) formed by the gap between two adjacent second sub-connectors 3022 can be divided into two mutually communicating parts according to different dimensions in the thickness direction of the connecting assembly 30.

[0137] As shown in Figures 5 to 6 , the second accommodating portion 3042 includes a communicating third sub-accommodating portion 3042a and a fourth sub-accommodating portion 3042b. The third sub-accommodating portion 3042a is located between the second latching heads 3022a of two adjacent second sub-connectors 3022, and the fourth sub-accommodating portion 3042b is located between the second connecting portions 3022b of two adjacent second sub-connectors 3022. When the first connector 301 and the second connector 302 are connected, along the first direction Dr1, the third sub-accommodating portion 3042a has a third distance Lc, and the fourth sub-accommodating portion 3042b has a fourth distance Ld. The third distance Lc is less than the fourth distance Ld, so that the second latching head 3022a has a portion protruding from the second connecting portion 3022b along the first direction Dr1, that is, the dimension of the second latching head 3022a along the first direction Dr1 is greater than the dimension of the second connecting portion 3022b connected thereto. In this way, when the first connector 301 and the second connector 302 are latched, the portion of the second latching head 3022a that exceeds the first connecting portion 3012b connected thereto along the first direction Dr1 can be used to form a block for the first latching head 3012a located in the fourth sub-accommodating portion 3042b, so as to prevent the first latching head 3012a located in the fourth sub-accommodating portion 3042b from easily coming out of the fourth sub-accommodating portion 3042b, and improve the connection reliability between the first connector 301 and the second connector 302.

[0138] The second latching head 3022a is latched as the protruding portion 303 to the accommodating portion 304 formed by the gap between two adjacent first sub-connectors 3012, and the first latching head 3012a is latched as the protruding portion 303 to the accommodating portion 304 formed by the gap between two adjacent second sub-connectors 3022 means that when the first connector 301 and the second connector 302 are connected, the second latching head 3022a is located in the second sub-accommodating portion 3041b, and the first latching head 3012a is located in the fourth sub-accommodating portion 3042b.

[0139] In some embodiments, when the first connecting member 301 and the second connecting member 302 are connected, the first latching head 3012a of any one of the first sub-connecting members 3012 is located in the accommodating portion 304 formed by the gaps between the second connecting portions 3022b of the plurality of second sub-connecting members 3022, and the second latching head 3022a of any one of the second sub-connecting members 3022 is located in the accommodating portion 304 formed by the gaps between the first connecting portions 3012b of the plurality of first sub-connecting members 3012. When one of the second sub-connecting members 3022 latched to the first sub-connecting member 301 is damaged, there are still a plurality of second sub-connecting members 3022 latched to the first sub-connecting member 301, and / or when one of the first sub-connecting members 3012 latched to the second sub-connecting member 3022 is damaged, there are still a plurality of first sub-connecting members 3012 latched to the second sub-connecting member 3022, so as to improve the connection reliability between the first sub-connecting member 3012 and the second sub-connecting member 3022.

[0140] In some embodiments, the plurality of second sub-connecting members 3022 are arranged in an array on the fourth surface 3021b, so that when the first connecting member 301 and the second connecting member 302 are connected, the first latching head 3012a of any one of the first sub-connecting members 3012 can be located in the accommodating portion 304 formed by the gaps between the second connecting portions 3022b of the plurality of second sub-connecting members 3022, and the second latching head 3022a of any one of the second sub-connecting members 3022 can also be located in the accommodating portion 304 formed by the gaps between the first connecting portions 3012b of the plurality of first sub-connecting members 3012.

[0141] In some embodiments, the second connecting member 302 can also be arranged in other forms that cooperate with the first connecting member 301. For example, the second connecting member 302 includes a second support layer 3021 and second sub-connecting members 3022 connected to the second support layer 3021. The second sub-connecting members 3022 include second latching heads 3022a and second connecting portions 3022b. The second connecting portion 3022b is connected between the second support layer 3021 and the second latching head 3022a, so that there is a gap between the second latching head 3022a and the second support layer 3021. The second latching head 3022a is arranged parallel to the second support layer 3021, and a plurality of through holes penetrating the second support layer 3021 are provided in the thickness direction of the second latching head 3022a to communicate the gap between the second latching head 3022a and the second support layer 3021. When the first connecting member 301 and the second connecting member 302 are connected, the first latching head 3012a can enter the gap between the second latching head 3022a and the second support layer 3021 through the corresponding through holes, so as to realize the latching between the first connecting member 301 and the second connecting member 302.

[0142] By making the second connecting member 302 include a plurality of second sub-connecting members 3022 arranged at intervals, and making the second clamping head 3022a be clamped in the accommodating portion 304 formed by the gap between two adjacent first sub-connecting members 3012, and the first clamping head 3012a be clamped in the accommodating portion 304 formed by the gap between two adjacent second sub-connecting members 3022, so that the plurality of first sub-connecting members 3012 are clamped with the plurality of second sub-connections, which is beneficial to improving the connection reliability between the first connecting member 301 and the second connecting member 302.

[0143] Please continue to refer to Figures 5 to 6 , according to some embodiments of the present application, the first connecting portion 3012b is rod-shaped, and the first clamping head 3012a is configured to be able to swing by the bending deformation of the first connecting portion 3012b.

[0144] According to some embodiments of the present application, the second connecting portion 3022b is rod-shaped, and the second clamping head 3022a is configured to be able to swing by the bending deformation of the second connecting portion 3022b.

[0145] The first connecting portion 3012b being rod-shaped may mean that the first connecting portion 3012b is a long strip-shaped rod, for example, it may be a cylindrical rod, a square rod, etc.

[0146] The first clamping head 3012a being configured to be able to swing by the bending deformation of the first connecting portion 3012b means that when connecting or disassembling the first connecting member 301 and the second connecting member 302, the first connecting portion 3012b can be bent and deformed in a plane perpendicular to the second surface 3011b, thereby driving the first clamping head 3012a to move in a plane perpendicular to the second surface 3011b, so that the first clamping head 3012a can conveniently enter the corresponding accommodating portion 304 or escape from the corresponding accommodating portion 304.

[0147] The second connecting portion 3022b being rod-shaped may mean that the second connecting portion 3022b is a long strip-shaped rod, for example, it may be a cylindrical rod, a square rod, etc. The second connecting portion 3022b may have the same type of rod-shaped structure as the first connecting portion 3012b, or may have a different type of rod-shaped structure, and the present application does not limit this.

[0148] The second snap head 3022a is configured to be able to swing by the bending deformation of the second connecting portion 3022b, which means that when connecting or disconnecting the first connecting member 301 and the second connecting member 302, the second connecting portion 3022b can be bent and deformed in a plane perpendicular to the fourth surface 3021b, thereby driving the second snap head 3022a to move in a plane perpendicular to the fourth surface 3021b, so that the second snap head 3022a can conveniently enter the corresponding receiving portion 304 or escape from the corresponding receiving portion 304.

[0149] In some embodiments, when connecting or disconnecting the first connecting member 301 and the second connecting member 302, at room temperature, the first snap head 3012a of the first connecting member 301 can be installed into the corresponding fourth sub-receiving portion 3042b along a fifth direction Dr5 intersecting the first direction Dr1, or the second connecting member 302 can be peeled off along the fifth direction Dr5 intersecting the first direction Dr1 to disengage the first snap head 3012a from the corresponding fourth sub-receiving portion 3042b, so as to connect or disconnect the first connecting member 301 and the second connecting member 302. Wherein, the included angle α between the fifth direction Dr5 and the first direction Dr1 is greater than or equal to 30 degrees and less than or equal to 60 degrees, so as to improve the convenience of connecting or disconnecting the first connecting member 301 and the second connecting member 302, and reduce the influence on the battery cell 20 and the box body 10 when disconnecting the first connecting member 301 and the second connecting member 302.

[0150] In addition, the disassembly of the first connecting member 301 and the second connecting member 302 can be achieved at room temperature, without separating the battery cell 20 and the box body plate 101 in a high-temperature or low-temperature environment, which is beneficial to avoiding damage to the battery cell 20 or the box body 10 caused by the high-temperature or low-temperature environment, and can increase the probability of the battery cell 20 and the box body 10 participating in secondary utilization.

[0151] In some embodiments, the first connecting portion 3012b and the second connecting portion 3022b are rod-shaped, the first snap head 3012a is configured to be able to swing by the bending deformation of the first connecting portion 3012b, and the second snap head 3022a is configured to be able to swing by the bending deformation of the second connecting portion 3022b.

[0152] By making the first connecting portion 3012b rod-shaped, the first clamping head 3012a is configured to be able to swing by the bending deformation of the first connecting portion 3012b. When the first connecting member 301 and the second connecting member 302 are clamped, through the bending deformation of the first connecting portion 3012b, the first clamping head 3012a can more conveniently enter the receiving portion 304 formed by the gap between two adjacent second sub-connecting members 3022. When the first connecting member 301 and the second connecting member 302 are disassembled, through the bending deformation of the first connecting portion 3012b, the first clamping head can also more conveniently escape from the receiving portion 304 formed by the gap between two adjacent second sub-connecting members 3022. While realizing the detachable connection between the first connecting member 301 and the second connecting member 302, the risk of damaging the first sub-connecting member 3012 when disassembling the first connecting member 301 and the second connecting member 302 can be reduced.

[0153] By making the second connecting portion 3022b rod-shaped, the second clamping head 3022a is configured to be able to swing by the bending deformation of the second connecting portion 3022b. When the first connecting member 301 and the second connecting member 302 are clamped, through the bending deformation of the second connecting portion 3022b, the second clamping head 3022a can more conveniently enter the receiving portion 304 formed by the gap between two adjacent first sub-connecting members 3012. When the first connecting member 301 and the second connecting member 302 are disassembled, through the bending deformation of the second connecting portion 3022b, the second clamping head can also more conveniently escape from the receiving portion 304 formed by the gap between two adjacent first sub-connecting members 3012. While realizing the detachable connection between the first connecting member 301 and the second connecting member 302, the risk of damaging the second sub-connecting member 3022 when disassembling the first connecting member 301 and the second connecting member 302 can be reduced.

[0154] Please continue to refer to Figures 5 to 7 , according to some embodiments of the present application, in the clamped state, the projection of the first clamping head 3012a on the second surface 3011b overlaps partially with the adjacent second clamping head 3022a, and the projection of the first connecting portion 3012b on the second surface 3011b is completely staggered from the adjacent second connecting portion 3022b.

[0155] In the clamped state, the projection of the first clamping head 3012a on the second surface 3011b overlaps partially with the adjacent second clamping head 3022a, and the projections of the first connecting portion 3012b and the adjacent second connecting portion 3022b on the second surface 3011b are completely staggered. This indicates that when the first connecting member 301 and the second connecting member 302 are clamped, the orthographic projections of the first connecting portion 3012b and the second connecting portion 3022b on the second surface 3011b are alternately arranged. Moreover, the first clamping head 3012a and the second clamping head 3022a can form a mutual block to prevent the first clamping head 3012a and the second clamping head 3022a from easily disengaging from the corresponding receiving portion 304.

[0156] By making the projection of the first clamping head 3012a on the second surface 3011b overlap partially with the adjacent second clamping head 3022a and the projections of the first connecting portion 3012b and the adjacent second connecting portion 3022b on the second surface 3011b be completely staggered in the clamped state, the reliable clamping of the first connecting member 301 and the second connecting member 302 can be achieved by using the first clamping head 3012a and the second clamping head 3022a, and the orthographic projections of the first connecting portion 3012b and the second connecting portion 3022b on the second surface 3011b can be alternately arranged to respectively leave corresponding receiving spaces for the first clamping head 3012a and the second clamping head 3022a.

[0157] Please continue to refer to Figure 5 , according to some embodiments of the present application, the cross-sectional area of the second clamping head 3022a parallel to the fourth surface 3021b gradually decreases in the fourth direction Dr4 perpendicular to the fourth surface 3021b and away from the second connecting portion 3022b.

[0158] The fact that the cross-sectional area of the second clamping head 3022a parallel to the fourth surface 3021b gradually decreases in the fourth direction Dr4 perpendicular to the fourth surface 3021b and away from the second connecting portion 3022b means that the size of the cross-section of the second clamping head 3022a near the second connecting portion 3022b is larger than the size of its cross-section away from the second connecting portion 3022b.

[0159] In some embodiments, the second latching head 3022a may be hemispherical. The second latching head 3022a has a third plane and a second curved surface. The third plane of the second latching head 3022a is fixedly connected to the second connecting portion 3022b. The second curved surface is connected to the third plane and protrudes toward the side away from the second connecting portion 3022b, so as to conveniently disengage the second latching head 3022a from the corresponding receiving portion 304 or introduce it into the corresponding receiving portion 304 when disassembling and connecting the first connector 301 and the second connector 302, thereby improving the convenience of disassembling and connecting the first connector 301 and the second connector 302. Moreover, when the first connector 301 and the second connector 302 are connected, reliable connection between the first connector 301 and the second connector 302 can be achieved through the third plane.

[0160] In some embodiments, the second latching head 3022a may also be frustum-shaped. The second latching head 3022a has a third plane, a fourth plane, and a connecting surface connecting the third plane and the fourth plane. The third plane of the second latching head 3022a is fixedly connected to the second connecting portion 3022b. The orthographic projection area of the fourth plane on the third surface 3021a is smaller than the orthographic projection area of the third plane on the fourth surface 3021b. In this way, when connecting the first connector 301 and the second connector 302, the second latching head 3022a can be conveniently introduced into the corresponding receiving portion 304, thereby improving the convenience of connecting the first connector 301 and the second connector 302. Moreover, when the second latching head 3022a enters the corresponding receiving portion 304, a block can be formed between the third plane and the corresponding first latching head 3012a, so that the first connector 301 and the second connector 302 have a relatively reliable connection.

[0161] In some embodiments, the second latching head 3022a may also be prismatic. The second latching head 3022a has a third plane, a fourth plane, and a plurality of connecting side surfaces connecting the third plane and the fourth plane. The third plane of the second latching head 3022a is fixedly connected to the second connecting portion 3022b. The orthographic projection area of the fourth plane on the third surface 3021a is smaller than the orthographic projection area of the third plane on the third surface 3021a. In this way, when connecting the first connector 301 and the second connector 302, the second latching head 3022a can also be conveniently introduced into the corresponding receiving portion 304, thereby improving the convenience of connecting the first connector 301 and the second connector 302. Moreover, when the first connector 301 and the second connector 302 are connected, a block can be formed between the third plane and the corresponding first latching head 3012a to achieve reliable connection between the first connector 301 and the second connector 302.

[0162] In some embodiments, the structures of the first sub-connector 3012 and the second sub-connector 3022 are the same to facilitate reducing the difficulty of manufacturing the connection assembly 30.

[0163] By making the cross-sectional area of the second latching head 3022a parallel to the fourth surface 3021b gradually decrease in a fourth direction Dr4 perpendicular to the fourth surface 3021b and away from the second connection portion 3022b, when the first connector 301 is latched with the second connector 302, the second latching head 3022a can conveniently enter the corresponding receiving portion 304, facilitating the connection between the first connector 301 and the second connector 302.

[0164] Please continue to refer to Figures 5 to 6 , according to some embodiments of the present application, along the thickness direction of the connection assembly 30, the size of the first latching head 3012a is smaller than the size of the second connection portion 3022b, and the size of the second latching head 3022a is smaller than the size of the first connection portion 3012b.

[0165] Along the thickness direction of the connection assembly 30, the size of the first latching head 3012a (abbreviated as the first size S1) is smaller than the size of the second connection portion 3022b (abbreviated as the second size S2), which can enable the first latching head 3012a to have a space for moving along the thickness direction of the connection assembly 30 within the fourth sub-receiving portion 3042b when the first connector 301 and the second connector 302 are latched.

[0166] Along the thickness direction of the connection assembly 30, the size of the second latching head 3022a (abbreviated as the third size S3) is smaller than the size of the first connection portion 3012b (abbreviated as the fourth size S4), which can enable the second latching head 3022a to have a space for moving along the thickness direction of the connection assembly 30 within the second sub-receiving portion 3041b when the first connector 301 and the second connector 302 are latched.

[0167] By making the size of the first latching head 3012a smaller than the size of the second connection portion 3022b and the size of the second latching head 3022a smaller than the size of the first connection portion 3012b along the thickness direction of the connection assembly 30, after the first connector 301 and the second connector 302 are latched, the first latching head 3012a and the second latching head 3022a can move along the thickness direction of the connection assembly 30 within the corresponding receiving portion 304, thereby providing buffering between the battery cell 20 and the box body 10 in scenarios such as transporting the battery 100, which is beneficial to protecting the battery cell 20. Moreover, when latching and disassembling the first connector 301 and the second connection, it can also provide a swinging space for the first latching head 3012a and the second latching head 3022a to facilitate the disassembly of the first connector 301 and the second connection.

[0168] Please continue to refer to Figures 5 to 6 , according to some embodiments of the present application, along the thickness direction of the connecting component 30, the dimensional difference between the second connecting portion 3022b and the first clamping head portion 3012a is greater than or equal to 0.15 cm and less than or equal to 0.4 cm; the dimensional difference between the first connecting portion 3012b and the second clamping head portion 3022a is greater than or equal to 0.15 cm and less than or equal to 0.4 cm.

[0169] Along the thickness direction of the connecting component 30, the dimensional difference between the second connecting portion 3022b and the first clamping head portion 3012a (briefly denoted as the first dimensional difference) refers to the difference between the dimension of the second connecting portion 3022b along the thickness direction of the connecting component 30 (i.e., the second dimension S2) and the dimension of the first clamping head portion 3012a along the thickness direction of the connecting component 30 (i.e., the first dimension S1). Along the thickness direction of the connecting component 30, the dimensional difference between the first connecting portion 3012b and the second clamping head portion 3022a (briefly denoted as the second dimensional difference) refers to the difference between the dimension of the first connecting portion 3012b along the thickness direction of the connecting component 30 (i.e., the fourth dimension S4) and the dimension of the second clamping head portion 3022a along the thickness direction of the connecting component 30 (i.e., the third dimension S3).

[0170] The larger the first dimensional difference and the second dimensional difference are, the greater the thickness of the connecting component 30 is, and the size of the battery 100 also increases accordingly, which is not conducive to improving the energy density of the battery 100. And the smaller the first dimensional difference and the second dimensional difference are, the smaller the buffering effect on the collision between the battery cell 20 and the box body plate 101 and other problems. Therefore, in order to reduce the influence of the connecting component 30 on the energy density of the battery 100 while realizing the buffering effect between the battery cell 20 and the box body plate 101, the first dimensional difference is greater than or equal to 0.15 cm and less than or equal to 0.4 cm, and the second dimensional difference is greater than or equal to 0.15 cm and less than or equal to 0.4 cm. In some embodiments, the first dimensional difference is equal to 0.15 cm, 0.2 cm, 0.25 cm, 0.3 cm, 0.35 cm or 0.4 cm. In some embodiments, the second dimensional difference is equal to 0.15 cm, 0.2 cm, 0.25 cm, 0.3 cm, 0.35 cm or 0.4 cm.

[0171] Since the first connecting member 301 and the second connecting member 302 are clamped, thus, when buffering the collision and other acting forces between the battery cell 20 and the box body plate 101, the relative moving distance of the first connecting member 301 and the second connecting member 302 along the thickness direction of the connecting component 30 depends on the smaller one of the first dimensional difference and the second dimensional difference. Therefore, in order to realize the buffering effect between the battery cell 20 and the box body plate 101 and reduce the influence of the connecting component 30 on the size of the battery 100, the first dimensional difference and the second dimensional difference can be made equal.

[0172] In some embodiments, along the thickness direction of the connecting component 30, the size of the connecting component 30 is greater than or equal to 0.2 cm and less than or equal to 0.6 cm, so as to reduce the influence of the connecting component 30 on the size of the battery 100. The size of the connecting component 30 along the thickness direction of the connecting component 30 refers to the size between the first surface 3011a and the third surface 3021a when the first connecting member 301 and the second connecting member 302 are snap-connected.

[0173] By making the size difference between the second connecting portion 3022b and the first snap head 3012a greater than or equal to 0.15 cm and less than or equal to 0.4 cm, and the size difference between the first connecting portion 3012b and the second snap head 3022a greater than or equal to 0.15 cm and less than or equal to 0.4 cm along the thickness direction of the connecting component 30, while providing a buffering effect between the battery cell 20 and the box body 10, the influence of the connecting component 30 on the size of the battery 100 can be reduced.

[0174] Please continue to refer to Figures 5 to 6 , in some embodiments, the minimum distance between the two first snap heads 3012a of any two adjacent first sub-connecting members 3012 along the first direction is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

[0175] In some embodiments, the minimum distance between the two second snap heads 3022a of any two adjacent second sub-connecting members 3022 along the first direction is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

[0176] In some embodiments, the minimum distance (i.e., the first distance La) between the first snap heads 3012a of any two adjacent first sub-connecting members 3012 along the first direction can be equal to 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, or 1.5 mm.

[0177] In some embodiments, the minimum distance (i.e., the third distance Lc) between the two second snap heads 3022a of any two adjacent second sub-connecting members 3022 along the first direction can be equal to 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, or 1.5 mm.

[0178] The larger the first spacing La is, the fewer the number of first sub-connectors 3012 that can be arranged on the second surface 3011b. The reduction in the number of first sub-connectors 3012 will affect the connection reliability when the first connector 301 and the second connector 302 are snap-connected. If the first spacing La is set too small, it will increase the difficulty of disassembling the first connector 301 and the second connector 302. Therefore, in order to make the first connector 301 and the second connector 302 have good connection reliability and can be disassembled conveniently, the first spacing La is made equal to 1 mm.

[0179] Similarly, the larger the third spacing Lc is, the fewer the number of second sub-connectors 3022 that can be arranged on the fourth surface 3021b. The reduction in the number of second sub-connectors 3022 will affect the connection reliability when the first connector 301 and the second connector 302 are snap-connected. If the third spacing Lc is set too small, it will increase the difficulty of disassembling the first connector 301 and the second connector 302. Therefore, in order to make the first connector 301 and the second connector 302 have good connection reliability and can be disassembled conveniently, the third spacing Lc is made equal to 1 mm.

[0180] In some embodiments, the first spacing La may be equal to or different from the third spacing Lc. Among them, the equality of the first spacing La and the third spacing Lc can facilitate the matching of the use of the first sub-connector 3012 and the second sub-connector 3022, thereby contributing to improving the connection reliability when the first connector 301 and the second connector 302 are snap-connected.

[0181] It can be understood that because the first connector 301 and the second connector 302 are snap-connected, the dimension of the first plane of the first snap head 3012a along the first direction Dr1 needs to be greater than the third spacing Lc, and the dimension of the third plane of the second snap head 3022a along the first direction needs to be greater than the first spacing La, so that when the first connector 301 and the second connector 302 are snap-connected, the first snap head 3012a and the second snap head 3022a can form a block with each other to ensure that the first connector 301 and the second connector 302 can be reliably connected.

[0182] The greater the distance between the boundary of the orthographic projection of the first latching head 3012a on the second surface 3011b and the boundary of the orthographic projection of the first connecting portion 3012b on the second surface 3011b, the greater the portion of the first latching head 3012a that can block the second latching head 3022a when the first connector 301 and the second connector 302 are latched, and the better the connection reliability between the first connector 301 and the second connector 302. However, the difficulty of disassembling the first connector 301 and the second connector 302 will be greater. Therefore, to balance the connection performance and disassembly performance of the first connector 301 and the second connector 302, the distance between the boundary of the orthographic projection of the first latching head 3012a on the second surface 3011b and the boundary of the orthographic projection of the first connecting portion 3012b on the second surface 3011b can be greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0183] Similarly, the greater the distance between the boundary of the orthographic projection of the second latching head 3022a on the third surface 3021a and the boundary of the orthographic projection of the second connecting portion 3022b on the third surface 3021a, the greater the portion of the second latching head 3022a that can block the first latching head 3012a when the first connector 301 and the second connector 302 are latched, and the better the connection reliability between the first connector 301 and the second connector 302. However, the difficulty of disassembling the first connector 301 and the second connector 302 will be greater. Therefore, to balance the connection performance and disassembly performance of the first connector 301 and the second connector 302, the distance between the boundary of the orthographic projection of the second latching head 3022a on the third surface 3021a and the boundary of the orthographic projection of the second connecting portion 3022b on the third surface 3021a can be greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0184] In some embodiments, the minimum distance along the first direction between two first latching heads 3012a of any two adjacent first sub-connectors 3012 is greater than or equal to 0.5 mm and less than or equal to 1.5 mm, and the minimum distance along the first direction between two second latching heads 3022a of any two adjacent second sub-connectors 3022 is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

[0185] By making the minimum distance along the first direction between two first latching heads 3012a of any two adjacent first sub-connectors 3012 greater than or equal to 0.5 mm and less than or equal to 1.5 mm, and the minimum distance along the first direction between two second latching heads 3022a of any two adjacent second sub-connectors 3022 greater than or equal to 0.5 mm and less than or equal to 1.5 mm, when the first connector 301 and the second connector 302 are latched, it can have better connection reliability and can also be disassembled conveniently.

[0186] Please continue to refer to Figures 5 to 6 , in some embodiments, the minimum distance between two first connection portions 3012b of any two adjacent first sub-connectors 3012 along the first direction is greater than or equal to 1.5 mm and less than or equal to 3.5 mm.

[0187] In some embodiments, the minimum distance between two second connection portions 3022b of any two adjacent second sub-connectors 3022 along the first direction is greater than or equal to 1.5 mm and less than or equal to 3.5 mm.

[0188] The larger the second distance Lb is, the fewer the number of first sub-connectors 3012 that can be provided on the second surface 3011b will be. The reduction in the number of first sub-connectors 3012 affects the connection reliability when the first connector 301 and the second connector 302 are snap-connected. If the second distance Lb is set too small, the accommodation space for the second snap head 3022a will be reduced. When disassembling the first connector 301 and the second connector 302, it is not conducive to the second snap head 3022a to change its position within the accommodation portion 304 formed by the gap between the first connection portions 3012b of two adjacent first sub-connectors 3012, increasing the difficulty for the second snap head 3022a to escape from the corresponding accommodation portion 304 and easily causing damage to the first sub-connector 3012 and / or the second sub-connector 3022. Therefore, in order to make the first connector 301 and the second connector 302 have better connection reliability when snap-connected, and at the same time, the first connector 301 and the second connector 302 can be conveniently disassembled, and the damage to the first sub-connector 3012 and the second sub-connector 3022 caused during disassembly can be reduced, the first distance La is greater than or equal to 1.5 mm and less than or equal to 3.5 mm. In some embodiments, the minimum distance (i.e., the second distance Lb) between the first connection portions 3012b of any two adjacent first sub-connectors 3012 along the first direction can be equal to 1.5 mm, 1.8 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm.

[0189] Similarly, the larger the fourth spacing Ld is, the fewer the number of the second sub-connectors 3022 that can be arranged on the fourth surface 3021b. The reduction in the number of the second sub-connectors 3022 affects the connection reliability when the first connector 301 and the second connector 302 are snap-connected. If the fourth spacing Ld is set too small, the accommodation space for the first snap head 3012a will be reduced. When disassembling the first connector 301 and the second connector 302, it is not conducive to the first snap head 3012a changing its position within the accommodation portion 304 formed by the gap between the second connection portions 3022b of two adjacent second sub-connectors 3022, increasing the difficulty for the first snap head 3012a to escape from the corresponding accommodation portion 304 and easily causing damage to the first sub-connector 3012 and / or the second sub-connector 3022. Therefore, in order to enable the first connector 301 and the second connector 302 to have better connection reliability when snap-connected, and at the same time, to facilitate the disassembly of the first connector 301 and the second connector 302 and reduce the damage caused to the first sub-connector 3012 and the second sub-connector 3022 during disassembly, the first spacing La is greater than or equal to 1.5 mm and less than or equal to 3.5 mm. In some embodiments, the minimum spacing (i.e., the fourth spacing Ld) between the second connection portions 3022b of any two adjacent second sub-connectors 3022 in the first direction may be equal to 1.5 mm, 1.8 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm.

[0190] In some embodiments, the minimum spacing between the two first connection portions 3012b of any two adjacent first sub-connectors 3012 in the first direction is greater than or equal to 1.5 mm and less than or equal to 3.5 mm, and the minimum spacing between the two second connection portions 3022b of any two adjacent second sub-connectors 3022 in the first direction is greater than or equal to 1.5 mm and less than or equal to 3.5 mm.

[0191] By making the minimum spacing between the two first connection portions 3012b of any two adjacent first sub-connectors 3012 in the first direction greater than or equal to 1.5 mm and less than or equal to 3.5 mm, and the minimum spacing between the two second connection portions 3022b of any two adjacent second sub-connectors 3022 in the first direction greater than or equal to 1.5 mm and less than or equal to 3.5 mm, when the first connector 301 and the second connector 302 are snap-connected, they can have better connection reliability, and at the same time, the first connector 301 and the second connector 302 can be conveniently disassembled, and the damage caused to the first sub-connector 3012 and the second sub-connector 3022 during disassembly can be reduced.

[0192] In some embodiments, the connection strength between the first connecting member 301 and the second connecting member 302 is greater than the bonding strength between the first adhesive layer 40 and the battery cell 20, and greater than the bonding strength between the box body plate 101 and the second adhesive layer 50.

[0193] The connection strength between the first connecting member 301 and the second connecting member 302 refers to the maximum external force that can be borne when the first connecting member 301 and the second connecting member 302 are connected. The bonding strength between the first adhesive layer 40 and the battery cell 20 refers to the stress required to break the interface where the battery cell 20 and the first adhesive layer 40 are bonded under the action of an external force. The bonding strength between the box body plate 101 and the second adhesive layer 50 refers to the stress required to break the interface where the box body plate 101 and the second adhesive layer 50 are bonded under the action of an external force.

[0194] The connection strength between the first connecting member 301 and the second connecting member 302 being greater than the bonding strength between the first adhesive layer 40 and the battery cell 20 indicates that after the battery cell 20 is separated from the first adhesive layer 40, the first connecting member 301 and the second connecting member 302 can still be in a connected state. The connection strength between the first connecting member 301 and the second connecting member 302 being greater than the bonding strength between the box body plate 101 and the second adhesive layer 50 indicates that after the box body plate 101 is separated from the second adhesive layer 50, the first connecting member 301 and the second connecting member 302 can still be in a connected state.

[0195] By making the connection strength between the first connecting member 301 and the second connecting member 302 greater than the bonding strength between the first adhesive layer 40 and the battery cell 20, and greater than the bonding strength between the box body plate 101 and the second adhesive layer 50, the first connecting member 301 and the second connecting member 302 can have a relatively reliable connection, so as to prevent problems such as the separation between the battery cell 20 and the box body 10 that affect the quality of the battery 100 during scenarios such as handling the battery 100.

[0196] In some embodiments, the bonding strength between the first adhesive layer 40 and the battery cell 20 is greater than or equal to 7 MPa, and the bonding strength between the box body plate 101 and the second adhesive layer 50 is greater than or equal to 7 MPa.

[0197] In some embodiments, the bonding strength between the first adhesive layer 40 and the battery cell 20 can be the same as or different from the bonding strength between the box body plate 101 and the second adhesive layer 50. In some embodiments, the thickness of the first adhesive layer 40 is greater than or equal to 0.2 mm and less than or equal to 1 mm, and the thickness of the second adhesive layer 50 is greater than or equal to 0.5 mm and less than or equal to 5 mm, so as to reduce the impact on the size of the battery 100 while meeting the bonding strength.

[0198] In some embodiments, the connection strength between the first connecting member 301 and the second connecting member 302 is greater than 7 MPa, so that the connection strength between the first connecting member 301 and the second connecting member 302 is greater than the bonding strength between the first adhesive layer 40 and the battery cell 20, and greater than the bonding strength between the box body plate 101 and the second adhesive layer 50.

[0199] By setting the bonding strength between the first adhesive layer 40 and the battery cell 20 and the bonding strength between the box body plate 101 and the second adhesive layer 50 to be greater than or equal to 7 MPa, a reliable connection between the battery cell 20 and the box body 10 and the connection assembly 30 can be achieved respectively.

[0200] In some embodiments, the material of the box body plate 101 is steel or aluminum, and the surface of the box body plate 101 facing the battery cell 20 is directly bonded to the second adhesive layer 50.

[0201] The fact that the surface of the box body plate 101 facing the battery cell 20 is directly bonded to the second adhesive layer 50 means that there is no insulating spray coating between the surface of the box body plate 101 facing the battery cell 20 and the second adhesive layer 50.

[0202] Since there is a connection assembly 30 between the box body plate 101 and the battery cell 20, insulation between the box body plate 101 and the battery cell 20 can be achieved through the connection assembly 30, and there is no need to provide an insulating coating on the surface of the box body plate 101. The surface of the box body plate 101 facing the battery cell 20 can be directly bonded to the second adhesive layer 50, so as to save costs while achieving insulation between the box body plate 101 and the battery cell 20.

[0203] Please continue to refer to Figure 2 , in some embodiments, the surface of the battery cell 20 facing the box body plate 101 has a bonding area 20a. The battery 100 includes an insulating film 1001, the insulating film 1001 covers the surface of the battery cell 20, and the insulating film 1001 includes a window opening portion 1001a, and the window opening portion 1001a exposes the bonding area 20a. Among them, the first connecting member 301 is bonded to the bonding area 20a of the battery cell 20 through the first adhesive layer 40.

[0204] The bonding area 20a is an area for realizing the connection between the first adhesive layer 40 and the battery cell 20. The insulating film 1001 is a film layer for insulating the battery cell 20. In some embodiments, the insulating film 1001 is also called blue glue or blue film. The window opening portion 1001a is a through hole that penetrates the insulating film 1001 in the thickness direction of the insulating film 1001 at a position corresponding to the bonding area 20a.

[0205] It can be understood that Figure 2Only the case where the pasting area 20a is located at the bottom of the battery cell 20 is shown. In some embodiments, the pasting area 20a may be located at the side of the battery cell 20.

[0206] By providing the insulating film 1001, the battery cell 20 has better insulation performance. By pasting the first adhesive layer 40 to the pasting area 20a exposed by the opening 1001a of the insulating film 1001, the connection between the first connecting member 301 and the battery cell 20 is realized, so that the position of the battery cell 20 is fixed.

[0207] Please continue to refer to Figure 8 , Figure 8 which is a flowchart of the battery assembly method according to some embodiments of the present application. The embodiments of the present application also provide a battery assembly method for assembling the battery 100 in the above embodiments. The battery assembly method includes:

[0208] Step S10: Provide the battery cell 20, the box body 10 and the connection assembly 30;

[0209] Step S20: Use the first adhesive layer 40 to paste the first connecting member 301 of the connection assembly 30 to the surface of the box body plate 101 of the box body 10 facing the battery cell 20; use the second adhesive layer 50 to paste the second connecting member 302 of the connection assembly 30 to the surface of the box body plate 101 of the box body 10 facing the battery cell 20;

[0210] Step S30: Snap the first connecting member 301 and the second connecting member 302 to assemble the battery cell 20 and the box body 10.

[0211] The first connecting member 301 may include a first support layer 3011 and a first sub-connecting member 3012. The first sub-connecting member 3012 is provided on the second surface 3011b of the first support layer 3011, and the second surface 3011b faces the second connecting member 302. The first sub-connecting member 3012 includes a first clamping head 3012a and a first connecting portion 3012b connecting the first clamping head 3012a and the second surface 3011b.

[0212] The second connecting member 302 may include a second support layer 3021 and a second sub-connecting member 3022. The second sub-connecting member 3022 is disposed on a fourth surface 3021b of the second support layer 3021, and the fourth surface 3021b faces the first connecting member 301. The second sub-connecting member 3022 includes a second clamping head 3022a and a second connecting portion 3022b connected between the second clamping head 3022a and the fourth surface 3021b. Wherein, the second clamping head 3022a is clamped in a receiving portion 304 formed by a gap between two adjacent first sub-connecting members 3012, and the first clamping head 3012a is clamped in a receiving portion 304 formed by a gap between two adjacent second sub-connecting members 3022, so as to realize the clamping connection between the first connecting member 301 and the second connecting member 302.

[0213] Correspondingly, step S30 may include:

[0214] Step S301: Fix the second connecting member 302 in place, and install the first clamping head 3012a of the first connecting member 301 into the corresponding receiving portion 304 along a direction intersecting with the fourth surface 3021b of the second connecting member 302, so as to assemble the battery cell 20 and the box body 10.

[0215] Step S301 can be performed at room temperature to avoid the influence of high temperature or low temperature on the battery cell 20 and the box body 10, which is beneficial to improving the probability of the battery cell 20 and the box body 10 participating in recycling.

[0216] When realizing the clamping connection between the first connecting member 301 and the second connecting member 302, the first connecting portion 3012b may be bent and deformed in a plane perpendicular to the second surface 3011b, thereby driving the first clamping head 3012a to move in a plane perpendicular to the second surface 3011b, so that the first clamping head 3012a can conveniently enter the corresponding receiving portion 304. The second connecting portion 3022b may be bent and deformed in a plane perpendicular to the fourth surface 3021b, thereby driving the second clamping head 3022a to move in a plane perpendicular to the fourth surface 3021b, so that the second clamping head 3022a can conveniently enter the corresponding receiving portion 304.

[0217] It should be noted that the sequence of the step of clamping the first connecting member 301 and the second connecting member 302 and step S20 can be swapped. That is, the clamping of the first connecting member 301 and the second connecting member 302 can be performed first, and then the connecting assembly 30 is pasted onto the surface of the box body plate 101 of the box body 10 facing the battery cell 20 by using the first adhesive layer 40, and the connecting assembly 30 is pasted onto the surface of the box body plate 101 of the box body 10 facing the battery cell 20 by using the second adhesive layer 50 to assemble the battery cell 20 and the box body 10. In this way, it is possible to avoid the obstruction caused by the battery cell 20 and the box body 10 during the clamping process of the first connecting member 301 and the second connecting member 302 when step S20 is performed first and then the first connecting member 301 and the second connecting member 302 are clamped.

[0218] It can be understood that for the battery assembly method provided in this application, since it is used to assemble the battery 100 in the above embodiments, therefore, the battery obtained by the assembly method has all the beneficial effects of the above battery 100, which will not be elaborated here.

[0219] In some embodiments, the embodiment of the present application further provides a battery disassembly method for disassembling the battery 100 in the above embodiments. The disassembly method includes:

[0220] Providing the battery 100;

[0221] Peeling the second connecting member 302 along a direction intersecting the second surface 3011b of the first connecting member 301 to disassemble the battery cell 20 and the box body 10.

[0222] In some embodiments, in the step of peeling the second connecting member 302 along a direction intersecting the second surface 3011b of the first connecting member 301 to disassemble the battery cell 20 and the box body 10, the angle between the direction intersecting the second surface 3011b and the first direction is greater than or equal to 30 degrees and less than or equal to 60 degrees, so as to facilitate the disassembly of the first connecting member 301 and the second connecting member 302 and reduce the damage caused to the first connecting member 301 and the second connecting member 302 during the disassembly process. The first direction is parallel to the second surface 3011b.

[0223] In some embodiments, the step of peeling the second connecting member 302 along a direction intersecting the second surface 3011b of the first connecting member 301 to disassemble the battery cell 20 and the box body 10 can be performed at room temperature.

[0224] When disassembling the first connecting member 301 and the second connecting member 302, the first connecting portion 3012b can be bent and deformed in a plane perpendicular to the second surface 3011b, thereby driving the first clamping head 3012a to move in a plane perpendicular to the second surface 3011b, so that the first clamping head 3012a can conveniently enter the corresponding receiving portion 304 or escape from the corresponding receiving portion 304. The second connecting portion 3022b can be bent and deformed in a plane perpendicular to the fourth surface 3021b, thereby driving the second clamping head 3022a to move in a plane perpendicular to the fourth surface 3021b, so that the second clamping head 3022a can conveniently escape from the corresponding receiving portion 304.

[0225] The battery disassembly method provided by the present application can disassemble the battery cell 20 and the box body 10 at room temperature, thus avoiding the influence of high temperature or low temperature on the battery cell 20 and the box body 10, which is beneficial to increasing the probability of the battery cell 20 and the box body 10 participating in recycling.

[0226] An embodiment of the present application further provides an electrical device, which includes the battery 100 in the above embodiment, and the battery 100 is used to provide electrical energy.

[0227] Among them, the electrical device includes transportation tools (such as vehicles, battery cars, ships, spacecrafts, etc.), display devices (such as mobile phones, tablets, laptop computers, etc.), electric toys, electric tools, etc.

[0228] It can be understood that the electrical device provided by the present application, due to the application of any one of the above batteries 100, has all the beneficial effects of the above battery 100, which will not be elaborated here.

[0229] An embodiment of the present application further provides an energy storage device, which includes the battery 100 in the above embodiment, and the battery 100 is used for energy storage.

[0230] The energy storage device may include, but is not limited to, a centralized energy storage device (such as a container energy storage device), a distributed energy storage device, a movable energy storage device, a wearable energy storage device, and the like.

[0231] It can be understood that the energy storage device provided by the present application, due to the application of any one of the above batteries 100, has all the beneficial effects of the above battery 100, which will not be elaborated here.

[0232] The battery 100 of the present application will be further described below with a specific embodiment.

[0233] The battery 100 provided by the embodiment of the present application includes a battery cell 20, a box body 10, a connection assembly 30, a first adhesive layer 40, and a second adhesive layer 50.

[0234] The box body 10 is used to accommodate the battery cells 20, and the box body 10 includes a box body plate 101 for connecting to the battery cells 20.

[0235] The connecting component 30 includes a first connecting piece 301 and a second connecting piece 302 that are detachably connected. The first connecting piece 301 includes a first support layer 3011 and a plurality of first sub-connecting pieces 3012. The first support layer 3011 includes a first surface 3011a and a second surface 3011b that are opposite in the thickness direction. The first surface 3011a is bonded to the first adhesive layer 40, and the first sub-connecting pieces 3012 are disposed on the second surface 3011b. The materials of the first support layer 3011 and the first sub-connecting pieces 3012 are both insulating materials. Any one of the first sub-connecting pieces 3012 includes a first clamping head 3012a and a first connecting portion 3012b. The first clamping head 3012a is connected to the second surface 3011b through the first connecting portion 3012b. The cross-sectional area of the first clamping head 3012a parallel to the second surface 3011b gradually decreases in a third direction perpendicular to the second surface 3011b and away from the first connecting portion 3012b. The minimum distance between the two first clamping heads 3012a of any two adjacent first sub-connecting pieces 3012 in a first direction parallel to the second surface 3011b is less than the minimum distance between the corresponding two first connecting portions 3012b in the first direction. The first connecting portion 3012b is rod-shaped, and the first clamping head 3012a is configured to be able to swing through the bending deformation of the first connecting portion 3012b.

[0236] The second connecting piece 302 includes a second support layer 3021 and a plurality of second sub-connecting pieces 3022. The second support layer 3021 includes a third surface 3021a and a fourth surface 3021b that are opposite in the thickness direction. The third surface 3021a is bonded to the second adhesive layer 50, and the second sub-connecting pieces 3022 are disposed on the fourth surface 3021b. Any one of the second sub-connecting pieces 3022 includes a second clamping head 3022a and a second connecting portion 3022b. The second clamping head 3022a is connected to the fourth surface 3021b through the second connecting portion 3022b. The cross-sectional area of the second clamping head 3022a parallel to the fourth surface 3021b gradually decreases in a fourth direction perpendicular to the fourth surface 3021b and away from the second connecting portion 3022b. The minimum distance between the two second clamping heads 3022a of any two adjacent second sub-connecting pieces 3022 in the first direction is less than the minimum distance between the corresponding two second connecting portions 3022b in the first direction. The second connecting portion 3022b is rod-shaped, and the second clamping head 3022a is configured to be able to swing through the bending deformation of the second connecting portion 3022b.

[0237] In the thickness direction of the connecting component 30, the size of the first clamping head 3012a is smaller than that of the second connecting part 3022b, and the size of the second clamping head 3022a is smaller than that of the first connecting part 3012b.

[0238] In the clamped state, the projection of the first clamping head 3012a and the adjacent second clamping head 3022a on the second surface 3011b partially overlaps, and the projections of the first connecting part 3012b and the adjacent second connecting part 3022b on the second surface 3011b are completely staggered.

[0239] The first adhesive layer 40 is located between the first connecting member 301 and the battery cell 20, and the first connecting member 301 is adhered to the surface of the battery cell 20 facing the box body plate 101 through the first adhesive layer 40. The second adhesive layer 50 is located between the second connecting member 302 and the box body plate 101, and the second connecting member 302 is adhered to the surface of the box body plate 101 facing the battery cell 20 through the second adhesive layer 50. The surface of the box body plate 101 facing the battery cell 20 is directly adhered to the second adhesive layer 50. The connection strength between the first connecting member 301 and the second connecting member 302 is greater than the adhesive strength between the first adhesive layer 40 and the battery cell 20, and greater than the adhesive strength between the box body plate 101 and the second adhesive layer 50.

[0240] The following is a further description in combination with specific embodiments and comparative examples. As shown in Table 1 below, in Comparative Example 1 and Embodiment 1, the same specifications of battery cells and boxes are selected. The battery includes the same number of multiple battery cells. The positive electrodes of the multiple battery cells in the battery are connected in series through components such as connection bars to form the high-voltage output pole of the battery. The material of the box body plate of the box is aluminum.

[0241] Among them, in Comparative Example 1, the connecting component is not provided. An insulating spray coating is provided on the surface of the box body plate in Comparative Example 1. The adhesive layer is adhered to the insulating spray coating provided on the surface of the box body plate, and the adhesive layer is adhered to the surface of the battery cell facing the box body plate. The material of the adhesive layer is polyurethane, and the thickness of the adhesive layer is 0.5 mm.

[0242] In Embodiment 1, the first connecting member 301 is adhered to the surface of the battery cell 20 facing the box body plate 101 through the first adhesive layer 40, and the second connecting member 302 is adhered to the surface of the box body plate 101 facing the battery cell 20 through the second adhesive layer 50, and the second adhesive layer 50 is directly adhered to the surface of the box body plate 101 facing the battery cell 20. The thickness of the connecting component 30 is 0.5 cm. The materials of the first support layer 3011, the second support layer 3021, the first sub-connecting member 3012, and the second sub-connecting member 3022 are polycarbonate. The materials of the first adhesive layer 40 and the second adhesive layer 50 are both polyurethane, and the thicknesses of the first adhesive layer 40 and the second adhesive layer 50 are both 0.5 mm.

[0243] Voltages of 1000V and 2700V were respectively applied between the high-voltage output electrode of the battery 100 in Example 1 and the box body 10, and voltages of 1000V and 2700V were respectively applied between the high-voltage output electrode of the battery 100 in Comparative Example 1 and the box body 10. An insulation withstanding voltage tester was used to verify the insulation performance of the battery 100, and the comparison results shown in Table 1 were obtained.

[0244]

[0245] As can be seen from Table 1, when the connecting component 30 is included in the battery 100 of Example 1, the second adhesive layer 50 is directly bonded to the box body plate 101, and no insulation spray coating is provided between the box body plate 101 and the second adhesive layer 50, and the insulation performance of the battery 100 can still meet the requirements. Moreover, when a voltage of 2700V is applied between the high-voltage output electrode of the battery 100 and the box body 10, the insulation performance of the battery 100 still meets the requirements.

[0246] In Comparative Example 1, since it is impossible to achieve 100% bubble-free glue coating for the adhesive layer, it is necessary to spray an insulation coating or an electrophoretic insulation layer on the battery cell and the box body plate to achieve insulation safety protection of the battery under high voltage. However, as can be seen from Table 1, when a voltage of 1000V is applied between the high-voltage output electrode of the battery 100 in Comparative Example 1 and the box body 10, the insulation performance of the battery 100 can no longer meet the requirements. Moreover, the yield of achieving insulation by spraying the insulation spray coating is low, the manufacturing process is complex, the cost is high, and the rework and scrap rates of the battery cells are high.

[0247] Therefore, the insulation performance of the battery 100 in Example 1 is significantly better than that in Comparative Example 1. Therefore, by making the battery 100 include the connecting component 30, and the connecting component 30 includes a first connecting member 301 and a second connecting member 302 made of an insulating material, double insulation of the battery 100 can be achieved, and the safety problems caused by poor insulation of the battery 100 can be greatly reduced. Moreover, when the battery 100 includes the connecting component 30, there is no need to provide an insulation spray coating on the surface of the box body plate 101, which is beneficial to saving the preparation process and reducing the preparation cost.

[0248] In the technical solution of the embodiment of the present application, the first connecting member 301 is adhered to the surface of the box body plate 101 of the box body 10 facing the battery cell 20 through the first adhesive layer 40, and the second connecting member 302 is adhered to the surface of the box body plate 101 facing the battery cell 20 through the second adhesive layer 50. Without changing the structures of the battery cell 20 and the box body 10, the detachable connection between the battery cell 20 and the box body 10 can be realized by using the detachable connection of the first connecting member 301 and the second connecting member 302, so that the battery assembly can be manufactured as much as possible using the existing preparation process, which is beneficial to cost saving. Moreover, the connecting assembly 30 is made of an insulating material, which is beneficial to improving the insulation performance of the battery 100.

[0249] 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not 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 covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that: include: Battery cells; A box body, used to accommodate the battery cell, the box body comprising a box body plate used to connect with the battery cell; A connecting assembly, comprising a first connecting member and a second connecting member that are detachably connected; a first adhesive layer, located between the first connector and the battery cell, the first connector being adhered to a surface of the battery cell facing the box plate through the first adhesive layer; as well as a second adhesive layer, located between the second connector and the box plate, the second connector being adhered to a surface of the box plate facing the battery cell through the second adhesive layer; The first connecting member comprises a plurality of first sub-connecting members spaced apart from each other, any of the first sub-connecting members comprises a first clamping joint portion and a first connecting portion, the first clamping joint portion is located at an end of the first connecting portion away from the first adhesive layer, and the minimum spacing between the two first clamping joint portions of any two adjacent first sub-connecting members is smaller than the minimum spacing between the corresponding two first connecting portions; The second connecting member comprises a plurality of second sub-connecting members spaced apart from each other, any of the second sub-connecting members comprises a second clamping joint portion and a second connecting portion, the second clamping joint portion is located at an end of the second connecting portion away from the second adhesive layer, and the minimum spacing between the two second clamping joint portions of any two adjacent second sub-connecting members is smaller than the minimum spacing between the corresponding two second connecting portions; The second clamping joint portion is clamped as a protrusion to a receiving portion formed by a gap between two adjacent first sub-connectors, and the first clamping joint portion is clamped as a protrusion to a receiving portion formed by a gap between two adjacent second sub-connectors.

2. The battery according to claim 1, characterized in that The first connecting member further comprises: a first supporting layer, comprising a first surface and a second surface opposite to each other in a thickness direction, the first surface being bonded to the first adhesive layer; The first sub-connector is disposed on the second surface; The second connecting member further comprises: a second supporting layer, comprising a third surface and a fourth surface opposite to each other in a thickness direction, wherein the third surface is bonded to the second adhesive layer; The second sub-connector is disposed on the fourth surface.

3. The battery according to claim 2, characterized in that The materials of the first supporting layer and the first sub-connector are both insulating materials; and / or The second supporting layer and the second sub-connector are both made of insulating materials.

4. The battery according to claim 2, characterized in that A plurality of the first sub-connectors are arranged in an array along a first direction and a second direction parallel to the second surface; The second direction is parallel to the second surface and intersects with the first direction.

5. The battery according to claim 2, characterized in that A cross-sectional area of ​​the first clamping joint portion parallel to the second surface gradually decreases along a third direction perpendicular to the second surface and away from the first connecting portion.

6. The battery according to claim 1, characterized in that The first connecting portion is rod-shaped, and the first clamping joint portion is configured to be able to swing through bending deformation of the first connecting portion; and / or The second connection portion is rod-shaped, and the second clamping joint portion is configured to be able to swing through bending deformation of the second connection portion.

7. The battery according to claim 2, characterized in that In the clamped state, the projections of the first clamping joint portion and the adjacent second clamping joint portion on the second surface partially overlap, and the projections of the first connection portion and the adjacent second connection portion on the second surface are completely staggered.

8. The battery according to claim 2, characterized in that A cross-sectional area of ​​the second clamping joint portion parallel to the fourth surface gradually decreases along a fourth direction perpendicular to the fourth surface and away from the second connecting portion.

9. The battery according to claim 1, characterized in that Along the thickness direction of the connection assembly, the size of the first clamping joint portion is smaller than the size of the second connection portion, and the size of the second clamping joint portion is smaller than the size of the first connection portion.

10. The battery according to claim 9, characterized in that Along the thickness direction of the connecting component, the size difference between the second connecting part and the first card joint part is greater than or equal to 0.15 cm and less than or equal to 0.4 cm; the size difference between the first connecting part and the second card joint part is greater than or equal to 0.15 cm and less than or equal to 0.4 cm.

11. The battery according to claim 2, characterized in that A minimum spacing between the two first clamping joints of any two adjacent first sub-connectors along a first direction parallel to the second surface is greater than or equal to 0.5 mm and less than or equal to 1.5 mm; and / or, The minimum spacing between the two second clamping joints of any two adjacent second sub-connectors along the first direction is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

12. The battery according to claim 2, characterized in that A minimum spacing between the two first connection portions of any two adjacent first sub-connectors along a first direction parallel to the second surface is greater than or equal to 1.5 mm and less than or equal to 3.5 mm; and / or The minimum spacing between the two second connection portions of any two adjacent second sub-connectors along the first direction is greater than or equal to 1.5 mm and less than or equal to 3.5 mm.

13. The battery according to any one of claims 1 to 12, characterized in that: The connection strength between the first connecting member and the second connecting member is greater than the bonding strength between the first adhesive layer and the battery cell, and greater than the bonding strength between the box plate and the second adhesive layer.

14. The battery according to claim 13, characterized in that The bonding strength between the first adhesive layer and the battery cell is greater than or equal to 7 MPa, and the bonding strength between the box plate and the second adhesive layer is greater than or equal to 7 MPa.

15. The battery according to any one of claims 1 to 12, characterized in that: The material of the box plate is steel or aluminum, and the surface of the box plate facing the battery cell is directly bonded to the second adhesive layer.

16. The battery according to any one of claims 1 to 12, characterized in that: The surface of the battery cell facing the box plate has an adhesive area; The battery comprises an insulating film, the insulating film is coated on the surface of the battery cell, and the insulating film comprises a window portion, the window portion exposes the pasting area; Wherein, the first connecting member is adhered to the adhesion area of ​​the battery cell through the first adhesive layer.

17. A battery assembly method, characterized in that: Used to assemble a battery as claimed in any one of claims 1 to 16, the assembling method comprising: Provide battery cells, boxes and connection components; Using a first adhesive layer to adhere a first connector of the connection assembly to a surface of a box plate of the battery cell facing the box; Using a second adhesive layer to adhere the second connector of the connection assembly to the surface of the box plate of the box facing the battery cell; The first connector is snap-connected with the second connector to assemble the battery cell and the box.

18. An electrical device, characterized in that: The electrical device comprises a battery as described in any one of claims 1 to 16, and the battery is used to provide electrical energy.

19. An energy storage device, characterized in that: The energy storage device comprises a battery as described in any one of claims 1 to 16, and the battery is used to store electrical energy.

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