Battery, battery assembly method, power utilization device and energy storage device

Abstract

The invention provides a battery, a battery assembly method, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery comprises a battery monomer, a box body, a connecting assembly, a first adhesive layer and a second adhesive layer, the box body comprises a box body plate used for being connected with the battery monomer, the connecting assembly comprises a first connecting piece and a second connecting piece which are detachably connected, the first adhesive layer is adhered between the battery monomer and the first connecting piece, and the second adhesive layer is adhered between the box body plate and the second connecting piece.

Description

Technical Field

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

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

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

[0004] In battery technology, battery cells and the box that contains them are usually fixedly connected. When rework or repair is required, it is difficult to separate the battery cells and the box, and the battery cells and the box 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 in the background technology. To this end, one 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 realize the detachability between the box and the battery cell.

[0006] An embodiment of the first aspect of the present application provides a battery, comprising a battery cell, a casing, a connecting assembly, a first adhesive layer, and a second adhesive layer. The casing is used to accommodate the battery cell, and the casing comprises a casing plate for connecting to the battery cell. The connecting assembly comprises 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 adhered to the surface of the battery cell facing the casing plate through the first adhesive layer. The second adhesive layer is located between the second connecting member and the casing plate, and the second connecting member is adhered to the surface of the casing plate facing the battery cell through the second adhesive layer.

[0007] In the technical solution of the embodiment of the present application, the battery includes a battery cell, a box, a connection component, a first adhesive layer and a second adhesive layer, so that the first connection component of the connection component is adhered to the surface of the box plate of the battery cell facing the box through the first adhesive layer, and the second connection component of the connection component is adhered to the surface of the box plate facing the battery cell through the second adhesive layer, so that the detachable connection between the battery cell and the box is realized through the detachable connection of the first connection component and the second connection component. In addition, the connection component is bonded to the battery cell and the box plate through the first adhesive layer and the second adhesive layer, and the detachable design between the battery cell and the box can be realized without changing the structure of the battery cell and the box, so that the battery cell and the box can be manufactured using the existing preparation process, which is conducive to cost saving.

[0008] In some embodiments, the first connector includes a first supporting layer and a first sub-connector. The second connector includes a second supporting layer and a second sub-connector. The first supporting 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-connector is arranged on the second surface. The second supporting 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-connector is arranged on the fourth surface. Among them, the first sub-connector and the second sub-connector are snap-fitted. In this way, the first supporting layer can be used to provide a supporting carrier for the first connector, so that the first sub-connector and the first adhesive layer can be connected through the first supporting layer while the first sub-connector is processed and manufactured, thereby realizing the connection between the first connector and the battery cell. The second supporting layer is used to provide a supporting carrier for the second connector, so that the second sub-connector and the second adhesive layer can be connected through the second supporting layer while the second sub-connector is processed and manufactured, thereby realizing the connection between the second connector and the box plate. By snapping the first sub-connector and the second sub-connector, the detachable connection between the first connector and the second connector can be realized.

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

[0010] In some embodiments, the second supporting layer and the second sub-connector are both made of insulating materials. In this way, the insulation between the battery cell and the box plate can be achieved through the second supporting layer and the second sub-connector, 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. The first connector and the second connector are engaged by at least one protrusion and at least one receiving portion. In this way, the engagement of the first connector and the second connector is achieved by the mutual cooperation of the protrusion and the receiving portion.

[0012] In some embodiments, the number of first sub-connectors is multiple and they are arranged at intervals from each other. Any first sub-connector includes a first clamping joint and a first connecting portion, and the first clamping joint is connected to the second surface through the first connecting portion. The first clamping joint forms a protrusion, and / or the gap between two adjacent first sub-connectors forms a receiving portion. Wherein, the minimum spacing between the two first clamping joints of any two adjacent first sub-connectors along the first direction parallel to the second surface is less than the minimum spacing between the corresponding two first connecting portions along the first direction. The first connecting member and the second connecting member are connected by forming a protrusion in the first clamping joint of the first sub-connector to engage with the receiving portion in the second sub-connector. The first connecting member and the second connecting member are connected by forming a receiving portion in the gap between two adjacent first sub-connectors to engage with the convex portion in the second sub-connector. The minimum spacing between the two first clamping joints of any two adjacent first sub-connectors along the first direction parallel to the second surface is smaller than the minimum spacing between the corresponding two first connecting parts along the first direction, so that the size of the first clamping joint along the first direction is larger than the size of the first connecting part connected to it. When the first connecting member and the second connecting member are clamped together, the part of the first clamping joint that exceeds the first connecting part connected to it along the first direction can be used to form a barrier for the protrusion located in the accommodating part, so as to prevent the protrusion in the accommodating part formed by the gap between the two adjacent first sub-connectors from easily falling out of the accommodating part, thereby improving the connection reliability of the first connecting member and the second connecting member.

[0013] In some embodiments, a plurality of first sub-connectors are arranged in an array along 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 a plurality of first sub-connectors in an array, when the first connector and the second connector are engaged, the first sub-connectors and the second sub-connectors form a multi-point engagement, thereby improving the connection reliability of the first connector and the second connector.

[0014] In some embodiments, the 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. In this way, the clamping connection between the first connecting member and the second connecting member can be easily achieved.

[0015] In some embodiments, the number of second sub-connectors is multiple and they are spaced apart from each other, and any second sub-connector includes a second clamping joint and a second connecting portion, and the second clamping joint is connected to the fourth surface through the second connecting portion. The minimum spacing between the two second clamping joints of any two adjacent second sub-connectors along the first direction is smaller than the minimum spacing between the corresponding two second connecting portions along the first direction. The second clamping joint is a protrusion that is clamped into the receiving portion formed by the gap between two adjacent first sub-connectors, and the first clamping joint is a protrusion that is clamped into the receiving portion formed by the gap between two adjacent second sub-connectors. In this way, multiple first sub-connectors can be clamped with multiple second sub-connectors, which is beneficial to improving the connection reliability of the first connector and the second connector.

[0016] In some embodiments, the first connecting portion is rod-shaped, and the first clamping joint portion is configured to be able to swing through the bending deformation of the first connecting portion. In this way, when the first connecting member and the second connecting member are clamped, the bending deformation of the first connecting portion allows the first clamping joint portion to more conveniently enter the accommodation portion formed by the gap between two adjacent second sub-connectors. When the first connecting member and the second connecting member are disassembled, the bending deformation of the first connecting portion allows the first clamping joint portion to more conveniently escape from the accommodation portion formed by the gap between two adjacent second sub-connectors, thereby achieving a detachable connection between the first connecting member and the second connecting member and reducing the risk of damaging the first sub-connector when disassembling the first connecting member and the second connecting member.

[0017] In some embodiments, the second connecting portion is rod-shaped, and the second clamping joint portion is configured to be able to swing through the bending deformation of the second connecting portion. In this way, when the first connecting member and the second connecting member are clamped, the second clamping joint portion can be bent and deformed to make it easier for the second clamping joint portion to enter the receiving portion formed by the gap between two adjacent first sub-connectors. When the first connecting member and the second connecting member are disassembled, the second clamping joint can be bent and deformed to make it easier for the second clamping joint portion to be disengaged from the receiving portion formed by the gap between two adjacent first sub-connectors, thereby achieving a detachable connection between the first connecting member and the second connecting member and reducing the risk of damaging the second sub-connector when disassembling the first connecting member and the second connecting member.

[0018] In some embodiments, in the clamped state, the projections of the first clamping joint and the adjacent second clamping joint on the second surface partially overlap, and the projections of the first connection part and the adjacent second connection part on the second surface are completely staggered. In this way, the first clamping joint and the second clamping joint can be used to realize reliable clamping of the first connection member and the second connection member, and the orthographic projections of the first connection member and the second connection member on the second surface can be alternately arranged to reserve corresponding accommodation spaces for the first clamping joint and the second clamping joint, respectively.

[0019] In some embodiments, the 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 connection portion. In this way, when the first connection member is clamped with the second connection member, the second clamping joint portion can be conveniently inserted into the corresponding accommodation portion, thereby facilitating the connection between the first connection member and the second connection member.

[0020] In some embodiments, along the thickness direction of the connection component, the size of the first clamping joint is smaller than the size of the second connection part, and the size of the second clamping joint is smaller than the size of the first connection part. In this way, after the first connector and the second connector are clamped, the first clamping joint and the second clamping joint can move in the corresponding accommodating part along the thickness direction of the connection component, thereby providing a buffer between the battery cell and the box body in scenes such as transporting batteries, which is beneficial to protecting the battery cell. Moreover, when the first connector and the second connection are clamped and disassembled, a swinging space can be provided for the first clamping joint and the second clamping joint, so as to realize the disassembly of the first connector and the second connection.

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

[0022] In some embodiments, the minimum spacing between the two first clamping joints of any two adjacent first sub-connectors along 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 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. In this way, the first connector and the second connector can have better connection reliability when clamped together, and can also be easily disassembled.

[0023] In some embodiments, the minimum spacing between the two first connection parts of any two adjacent first sub-connectors along 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 spacing between the two second connection parts 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. In this way, the first connector and the second connector can have better connection reliability when they are connected, and the first connector and the second connector can be easily disassembled, and the damage to the first connector and the second connector during disassembly can be reduced.

[0024] In some embodiments, the connection strength between the first connector and the second connector 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. In this way, the first connector and the second connector can be more reliably connected to prevent the battery cell and the box from separating from each other during battery transportation and other situations that affect battery quality.

[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 plate and the second adhesive layer is greater than or equal to 7 MPa. In this way, the battery cell and the box can be reliably connected to the connection assembly.

[0026] In some embodiments, 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. Since a connection component is provided between the box plate and the battery cell, the insulation between the box plate and the battery cell can be achieved through the connection component without providing an insulating coating on the surface of the box plate, which can save costs while achieving insulation performance between the box plate and the battery cell.

[0027] In some embodiments, the surface of the battery cell facing the box plate has an adhesive area. The battery includes an insulating film, the insulating film is coated on the surface of the battery cell, and the insulating film includes a window portion, and the window portion exposes the adhesive area. The first connector is attached to the adhesive area of ​​the battery cell through the first adhesive layer. By providing the insulating film, the battery cell has better insulation performance, and by attaching the first adhesive layer to the adhesive area exposed by the window portion of the insulating film, the connection between the first connector and the battery cell is achieved, so that the position of the battery cell is fixed.

[0028] An embodiment of the second aspect of the present application provides a battery assembly method for assembling the battery in the above-mentioned embodiment, the assembly method comprising providing a battery cell, a case and a connecting assembly; using a first adhesive layer to adhere a first connecting member of the connecting assembly to a surface of a case plate of the battery cell facing the case; using a second adhesive layer to adhere a second connecting member of the connecting assembly to a surface of the case plate of the case facing the battery cell; and clamping the first connecting member and the second connecting member to assemble the battery cell and the case.

[0029] In the technical solution of the embodiment of the present application, the first connector of the connecting assembly is adhered to the surface of the box plate of the battery cell facing the box body through the first adhesive layer, and the second connector of the connecting assembly is adhered to the surface of the box plate of the box body facing the battery cell through the second adhesive layer. The first connector is snap-fitted with the second connector to achieve connection between the battery cell and the box body, thereby realizing 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 storing energy.

[0032] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0034] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application; Figure 2 A schematic diagram of the exploded structure of a battery according to some embodiments of the present application; Figure 3 A schematic diagram of the structure of a battery cell in some embodiments of the present application; Figure 4 A schematic diagram of the positions of battery cells, box plates and connection components in some embodiments of the present application; Figure 5 This is a schematic diagram of the structure of the connection components of some embodiments of the present application; Figure 6 A schematic diagram of the structure of disassembling or clamping the first connecting member and the second connecting member in some embodiments of the present application; Figure 7 This is a schematic diagram of the distribution of the first sub-connectors in some embodiments of the present application in a corresponding clamping state; Figure 8 This is a flow chart of a battery assembly method according to some embodiments of the present application.

[0035] Description of reference numerals: Vehicles 1000; Battery 100, insulating film 1001, window portion 1001a, controller 200, motor 300; Box body 10, box body plate 101, first component 11, second component 12; Battery cell 20, pasting area 20a; end cover 21, electrode terminal 21a, shell 22, electrode assembly 23, pole ear 23a; Connecting assembly 30, first connecting member 301, first supporting layer 3011, first surface 3011a, second surface 3011b, first sub-connecting member 3012, first clamping joint portion 3012a, first connecting portion 3012b, second connecting member 302, second supporting layer 3021, third surface 3021a, fourth surface 3021b, second sub-connecting member 3022, second clamping joint portion 3022a, second connecting portion 3022b, protruding portion 303, accommodating portion 304, first accommodating portion 3041, first sub-accommodating portion 3041a, second sub-accommodating portion 3041b, second accommodating portion 3042, third sub-accommodating portion 3042a, fourth sub-accommodating portion 3042b; The first adhesive layer 40 and the second adhesive layer 50 . DETAILED DESCRIPTION

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

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

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

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

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

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

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

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

[0044] At present, from the perspective of market development, the application of 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 stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, its market demand is also constantly expanding.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0052] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0053] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. Vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0054] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0055] Please refer to Figure 2~Figure 5 , Figure 2 A schematic diagram of the exploded structure of a battery provided in some embodiments of the present application, Figure 3 This is a schematic diagram of the structure of a battery cell in some embodiments of the present application. Figure 4 This is a schematic diagram of the positions of battery cells, box plates and connection components in some embodiments of the present application. Figure 5 This is a schematic diagram of the structure of the connection components of some embodiments of the present application.

[0056] The embodiment of the present application provides a battery 100 , which includes a housing 10 , a battery cell 20 , a connection assembly 30 , a first adhesive layer 40 , and a second adhesive layer 50 .

[0057] 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 with the battery cells 20 .

[0058] The connection assembly 30 includes a first connection member 301 and a second connection member 302 that are detachably connected.

[0059] The first adhesive layer 40 is located between the first connector 301 and the battery cell 20 , and the first connector 301 is adhered to the surface of the battery cell 20 facing the box plate 101 through the first adhesive layer 40 .

[0060] The second adhesive layer 50 is located between the second connector 302 and the box plate 101 , and the second connector 302 is adhered to the surface of the box plate 101 facing the battery cell 20 through the second adhesive layer 50 .

[0061] The box 10 is used to provide a storage space for the battery cell 20 so that the battery cell 20 can be accommodated in the box 10. The box 10 can adopt a variety of structures. In some embodiments, the box 10 may 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 storage space for accommodating the battery cell 20. The second component 12 may be a hollow structure with one end open, and the first component 11 may be a plate-like structure, and 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 storage space; the first component 11 and the second component 12 may also 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 10 formed by the first component 11 and the second component 12 can be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0062] The box plate 101 is a component in the box 10 for connecting with the battery cell 20. The box plate 101 can be a bottom plate in the box 10 for carrying the battery cell 20, or a side plate in the box 10 connected to the bottom plate of the box 10, and the side plate is vertically connected to the bottom plate to form a storage space for accommodating the battery cell 20. One of the first component 11 and the second component 12 includes the box plate 101. The same battery 100 includes at least one box plate 101.

[0063] The battery cell 20 is the smallest unit constituting the battery 100. The battery cell 20 includes an end cap 21, a housing 22 and an electrode assembly 23. Figure 3 shown.

[0064] The end cap 21 refers to a component that covers the opening of the shell 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 shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. In some embodiments, functional components such as electrode terminals 21a can be provided on the end cap 21. The electrode terminal 21a can be used to electrically connect to the electrode assembly for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0065] The shell 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, the electrolyte and other components. The shell 22 and the end cap 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cap 21 at the opening. Without limitation, the end cap 21 and the shell 22 can also be integrated. Specifically, the end cap 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 22, the end cap 21 covers the shell 22. The shell 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0066] The electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 23 may be included in the housing 22. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 23a. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery 100, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0067] The battery cell 20 may be a secondary battery 100 or a primary battery 100, or 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 may be cylindrical, flat, rectangular or in other shapes.

[0068] The battery 100 may include at least one battery cell 20. When the battery 100 includes multiple battery cells 20, the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole body formed by the multiple battery cells 20 is accommodated in the box 10. Of course, the battery 100 may also be a battery 100 module in which multiple battery cells 20 are first connected in series, in parallel, or in a mixed connection, and the multiple battery 100 modules are then connected in series, in parallel, or in a mixed connection to form a whole body and accommodated in the box 10.

[0069] The connection assembly 30 is a component for realizing the detachable connection between the battery cell 20 and the box plate 101. The connection assembly 30 includes a first connection member 301 and a second connection member 302. The detachable connection between the first connection member 301 and the second connection member 302 can realize the detachable connection between the battery cell 20 and the box plate 101. The detachable connection between the first connection member 301 and the second connection member 302 means that the first connection member 301 and the second connection member 302 can be easily disassembled and assembled when necessary (such as in the case of repair).

[0070] The first adhesive layer 40 is used to achieve reliable connection between the battery cell 20 and the first connector 301 and to fix the relative position of the battery cell 20 and the first connector 301 .

[0071] In some embodiments, when the battery 100 includes multiple battery cells 20, the multiple 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 making the multiple battery cells 20 have the same connection reference plane, so as to reduce the height difference and other problems that may occur between the multiple battery cells 20.

[0072] The second adhesive layer 50 is used to achieve reliable connection between the box plate 101 and the second connecting member 302 and to fix the relative position of the box plate 101 and the second connecting member 302 .

[0073] In some embodiments, the material of the first adhesive layer 40 and the material of the second adhesive layer 50 can be polyurethane structural adhesive, acrylic structural adhesive, silicone, epoxy structural adhesive, ultraviolet curing adhesive (UV adhesive) or high temperature resistant hot melt adhesive. In some embodiments, the material of the first adhesive layer 40 and the material of the second adhesive layer 50 are the same to reduce the types of products used by the battery 100 and reduce costs. In some embodiments, the material of the first adhesive layer 40 and the material of the second adhesive layer 50 can also be selected to be different.

[0074] It should be noted that the battery 100 may also include other structures. For example, the battery 100 may also include a busbar component to achieve electrical connection between the plurality of battery cells 20 .

[0075] By making the battery 100 include a battery cell 20, a box 10, a connection assembly 30, a first adhesive layer 40 and a second adhesive layer 50, the first connection member 301 of the connection assembly 30 is adhered to the surface of the box plate 101 of the battery cell 20 facing the box 10 through the first adhesive layer 40, and the second connection member 302 of the connection assembly 30 is adhered to the surface of the box plate 101 facing the battery cell 20 through the second adhesive layer 50, so that the detachable connection between the battery cell 20 and the box 10 is realized through the detachable connection of the first connection member 301 and the second connection member 302. In addition, the connection assembly 30 is bonded to the battery cell 20 and the box plate 101 through the first adhesive layer 40 and the second adhesive layer 50, so that the detachable design between the battery cell 20 and the box 10 can be realized without changing the structure of the battery cell 20 and the box 10, so that the battery assembly can be manufactured using the existing preparation process as much as possible, which is conducive to cost saving.

[0076] Moreover, the first connecting member 301 and the second connecting member 302 can be connected to the battery cell 20 and the box plate 101 only through the first adhesive layer 40 and the second adhesive layer 50, so that the connection component 30 and the battery cell 20 and the box plate 101 can be connected with a simpler process, which is beneficial to saving the manufacturing cost of the battery 100.

[0077] Please continue reading Figure 5~Figure 6 , Figure 6 This is a schematic diagram of the structure of disassembling or clamping the first connecting member and the second connecting member in some embodiments of the present application.

[0078] According to some embodiments of the present application, the first connector 301 includes a first supporting layer 3011 and a first sub-connector 3012. The first supporting layer 3011 includes a first surface 3011a and a second surface 3011b opposite to each other along the thickness direction, the first surface 3011a is bonded to the first adhesive layer 40, and the first sub-connector 3012 is disposed on the second surface 3011b.

[0079] The second connector 302 includes a second supporting layer 3021 and a second sub-connector 3022. The second supporting layer 3021 includes a third surface 3021a and a fourth surface 3021b opposite to each other in the thickness direction, the third surface 3021a is bonded to the second adhesive layer 50, and the second sub-connector 3022 is disposed on the fourth surface 3021b.

[0080] The first sub-connecting member 3012 and the second sub-connecting member 3022 are snap-connected.

[0081] The first supporting layer 3011 is a carrier for providing support for the first sub-connector 3012. The first supporting layer 3011 and the first sub-connector 3012 may be integrally formed or may be formed in steps.

[0082] The first surface 3011a of the first supporting layer 3011 refers to the surface facing the first adhesive layer 40 and bonded to the first adhesive layer 40, and the second surface 3011b is the surface opposite to the first surface 3011a along the thickness direction of the connecting component 30, and faces the first sub-connector 3012 and contacts the first sub-connector 3012.

[0083] The first sub-connector 3012 is an execution component for realizing detachable connection between the first connector 301 and the second connector 302 . The first sub-connector 3012 is connected to the first adhesive layer 40 through the first supporting layer 3011 .

[0084] The second supporting layer 3021 is a carrier for providing support for the second sub-connector 3022. The second supporting layer 3021 and the second sub-connector 3022 may be integrally formed or may be manufactured in steps.

[0085] The third surface 3021a of the second supporting layer 3021 refers to the surface facing the second adhesive layer 50 and bonded to the second adhesive layer 50, and the fourth surface 3021b is the surface opposite to the third surface 3021a along the thickness direction of the connecting component 30, and faces the second sub-connector 3022 and contacts the second sub-connector 3022.

[0086] The second sub-connector 3022 is an execution component for realizing detachable connection between the first connector 301 and the second connector 302 . The second sub-connector 3022 is connected to the second adhesive layer 50 through the second supporting layer 3021 .

[0087] The connection assembly 30 cooperates with the first sub-connector 3012 and the second sub-connector 3022 to realize the detachable connection between the first connection member 301 and the second connection member 302. That is, the first sub-connector 3012 and the second sub-connector 3022 are connected to realize the connection between the first connection member 301 and the second connection member 302. The first sub-connector 3012 and the second sub-connector 3022 are separated to realize the disassembly of the first connection member 301 and the second connection member 302. The connection between the first sub-connector 3012 and the second sub-connector 3022 can be realized by the tension between the first sub-connector 3012 and the second sub-connector 3022 to realize the fixed connection between the two. The separation of the first sub-connector 3012 and the second sub-connector 3022 can be realized by external force.

[0088] The first sub-connector 3012 and the second sub-connector 3022 are connected by snapping, which means that the first sub-connector 3012 and the second sub-connector 3022 can be firmly connected and detachable by insertion, snapping, etc. The first sub-connector 3012 and the second sub-connector 3022 can be connected by snapping.

[0089] It should be noted that, in some embodiments, the first sub-connector 3012 and the second sub-connector 3022 may also be detachably connected in the form of a key connection, a pin connection, or the like.

[0090] By making the first connector 301 include the first supporting layer 3011 and the first sub-connector 3012, the first supporting layer 3011 is used to provide a support carrier for the first connector 301, so that the first sub-connector 3012 is connected to the first adhesive layer 40 through the first supporting layer 3011 while the first connector 301 is processed and manufactured, thereby realizing the connection between the first connector 301 and the battery cell 20. By making the second supporting layer 3021 provide a support carrier for the second connector 302, so that the second sub-connector 3022 is connected to the second adhesive layer 50 through the second supporting layer 3021 while the second connector 302 is processed and manufactured, thereby realizing the connection between the second connector 302 and the box plate 101. By making the first sub-connector 3012 and the second sub-connector 3022 snap-fit, the first connector 301 and the second connector 302 can be detachably connected.

[0091] In some embodiments, the materials of the first supporting layer 3011 and the first sub-connector 3012 are both insulating materials.

[0092] In some embodiments, the materials of the second supporting layer 3021 and the second sub-connector 3022 are both insulating materials.

[0093] The materials of the first supporting layer 3011 and the first sub-connector 3012 are both insulating materials, which means that the first supporting layer 3011 and the first sub-connector 3012 are both made of insulating materials, so that the first supporting layer 3011 and the first sub-connector 3012 are non-conductive under the allowed voltage.

[0094] The second supporting layer 3021 and the second sub-connector 3022 are both made of insulating materials, which means that the second supporting layer 3021 and the second sub-connector 3022 are both made of insulating materials, so that the second supporting layer 3021 and the second sub-connector 3022 are non-conductive under the allowed voltage.

[0095] In some embodiments, the materials of the first supporting layer 3011, the second supporting layer 3021, the first sub-connector 3012, and the second sub-connector 3022 can be selected from one of polyamide, polyurethane, polycarbonate, etc. In some embodiments, the materials of the first supporting layer 3011, the second supporting layer 3021, the first sub-connector 3012, and the second sub-connector 3022 are polycarbonate, so as to utilize the mechanical properties of polycarbonate, so that the first connector 301 and the second connector 302 both have good tensile strength, bending strength, and compression strength, so as to realize the detachable connection between the first connector 301 and the second connector 302.

[0096] In some embodiments, the materials of the first supporting layer 3011 , the first sub-connector 3012 , the second supporting layer 3021 , and the second sub-connector 3022 are all insulating materials.

[0097] 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, insulation between the battery cell 20 and the box plate 101 is achieved, which is beneficial to improving the insulation performance of the battery 100.

[0098] Please continue reading Figure 5~Figure 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. The first connector 301 and the second connector 302 are connected by the at least one protrusion 303 and the at least one receiving portion 304.

[0099] One of the first sub-connector 3012 and the second sub-connector 3022 is configured to have at least one protrusion 303, which may mean that the first sub-connector 3012 has at least one protrusion 303, or 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.

[0100] 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, which may mean that the first sub-connector 3012 has at least one receiving portion 304, or 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.

[0101] The protrusion 303 refers to a portion 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 a space in the first sub-connector 3012 and / or the second sub-connector 3022 that can accommodate the corresponding protrusion 303.

[0102] The first connecting member 3012 and the second connecting member 3022 are provided with a protrusion 303 and a receiving portion 304 that cooperate with each other, so as to realize the clamping connection between the first connecting member 301 and the second connecting member 302 .

[0103] Please continue reading Figure 5~Figure 6 According to some embodiments of the present application, the number of the first sub-connectors 3012 is multiple and they are spaced apart from each other. Any first sub-connector 3012 includes a first clamping joint portion 3012a and a first connecting portion 3012b, and the first clamping joint portion 3012a is connected to the second surface 3011b through the first connecting portion 3012b. The first clamping joint portion 3012a forms a protrusion 303, and / or the gap between two adjacent first sub-connectors 3012 forms a receiving portion 304. The minimum spacing between the two first clamping joint portions 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 spacing between the corresponding two first connecting portions 3012b along the first direction Dr1.

[0104] The number of the first sub-connectors 3012 being multiple and being arranged at intervals from each other 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 joint portion 3012a and a first connecting portion 3012b, and the first clamping joint portion 3012a can be used as a protrusion 303 to cooperate with a receiving portion 304 in the second connecting member 302 to achieve the clamping connection between the first connecting member 301 and the second connecting member 302. The first connecting portion 3012b is a portion of the first sub-connector 3012 used to connect the first supporting layer 3011 and the first clamping joint portion 3012a. In some embodiments, the gap between two adjacent first sub-connectors 3012 can form a receiving portion 304 to cooperate with the protrusion 303 in the second connecting member 302 to achieve the clamping connection between the first connecting member 301 and the second connecting member 302.

[0105] In some embodiments, the first clamping joint portion 3012a and the first connecting portion 3012b are integrally formed so that the first sub-connector 3012 has better structural strength, thereby achieving reliable connection between the first connector 301 and the second connector 302 when the first connector 301 and the second connector 302 are connected.

[0106] Along the first direction Dr1 parallel to the second surface 3011b, the minimum spacing (abbreviated as the first spacing La) between the two first clamping joints 3012a of any two adjacent first sub-connectors 3012 is smaller than the minimum spacing (abbreviated as the second spacing Lb) between the corresponding two first connection parts 3012b, so that the accommodating portion 304 (abbreviated as the first accommodating portion 3041) formed by the gap between the two adjacent first sub-connectors 3012 can be divided into two interconnected parts according to their different sizes along the thickness direction of the connecting component 30.

[0107] Please continue to read Figure 5~Figure 6The first receiving portion 3041 includes a first sub-receiving portion 3041a and a second sub-receiving portion 3041b that are connected. The first sub-receiving portion 3041a is located between the first clamping joint portions 3012a of two adjacent first sub-connectors 3012, and the second sub-receiving portion 3041b is located between the first connecting portions 3012b of two adjacent first sub-connectors 3012. Along the first direction Dr1, the first sub-receiving portion 3041a has a first spacing La, and the second sub-receiving portion 3041b has a second spacing Lb, and the first spacing La is smaller than the second spacing Lb. The first spacing La is smaller than the second spacing Lb, so that the first clamping joint portion 3012a has a portion protruding from the first connecting portion 3012b along the first direction Dr1, that is, the size of the first clamping joint portion 3012a along the first direction Dr1 is larger than the size of the first connecting portion 3012b connected thereto. In this way, when the first connecting member 301 and the second connecting member 302 are clamped together, the portion of the first clamping joint 3012a that extends beyond the first connecting member 3012b connected thereto in the first direction Dr1 can be used to form a barrier for the protrusion 303 located in the second sub-accommodating portion 3041b, so as to prevent the protrusion 303 located in the second sub-accommodating portion 3041b from easily falling out of the second sub-accommodating portion 3041b, thereby improving the connection reliability between the first connecting member 301 and the second connecting member 302.

[0108] The first clamping joint 3012a of the first sub-connector 3012 is formed into a protruding portion 303 to be clamped with the receiving portion 304 in the second sub-connector 3022, thereby realizing the clamping connection between the first connector 301 and the second connector 302. The gap between two adjacent first sub-connectors 3012 is formed into a receiving portion 304 to be clamped with the convex portion in the second sub-connector 3022, thereby realizing the clamping connection between the first connector 301 and the second connector 302. The minimum spacing between the two first clamping joints 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 between the corresponding two first connection parts 3012b along the first direction Dr1, so that the size of the first clamping joint 3012a along the first direction Dr1 is larger than the size of the first connection part 3012b connected thereto. When the first connector 301 and the second connector 302 are clamped together, the portion of the first clamping joint 3012a that exceeds the first connection part 3012b connected thereto along the first direction Dr1 can be used to form a barrier for the protrusion 303 located in the accommodating portion 304, so as to prevent the protrusion 303 in the accommodating portion 304 formed by the gap between the two adjacent first sub-connectors 3012 from easily falling out of the accommodating portion 304, thereby improving the connection reliability between the first connector 301 and the second connector 302.

[0109] Please continue reading Figure 7 , Figure 7This is a schematic diagram of the distribution of the first sub-connectors in some embodiments of the present application in a corresponding snap-in state.

[0110] According to some embodiments of the present application, the plurality of first sub-connectors 3012 are arranged in an array along a first direction Dr1 and a second direction Dr2, wherein the second direction Dr2 is parallel to the second surface 3011b and intersects with the first direction Dr1.

[0111] The plurality of first sub-connectors 3012 are arranged in an array along the first direction Dr1 and the second direction Dr2 , which means that the plurality of first sub-connectors 3012 are arranged in an array along the first direction Dr1 and also along the second direction Dr2 .

[0112] 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 the distribution density 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 engaged, the connection strength of the portion corresponding to the boundary of the connection component 30 is greater than the connection strength of the portion corresponding to the center of the connection component 30. In this way, the connection reliability of the portion corresponding to the boundary of the connection component 30 is good, but the disassembly difficulty is large; the connection reliability of the portion corresponding to the center of the connection component 30 is relatively weak, but the disassembly difficulty is small. Therefore, the portion corresponding to the boundary of the connection component 30 can be used to realize the reliable connection between the battery cell 20 and the box plate 101, and the portion corresponding to the center of the connection component 30 can be used to accelerate the disassembly of the first connector 301 and the second connector 302.

[0113] By arranging the plurality of first sub-connectors 3012 in an array, when the first connector 301 and the second connector 302 are connected, the first sub-connectors 3012 and the second sub-connectors 3022 form a multi-point connection, thereby improving the connection reliability of the first connector 301 and the second connector 302.

[0114] Please continue reading Figure 5~Figure 6 According to some embodiments of the present application, the cross-sectional area of ​​the first clamping joint portion 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 connecting portion 3012b.

[0115] The cross-sectional area of ​​the first clamping joint part 3012a parallel to the second surface 3011b gradually decreases along the third direction perpendicular to the second surface 3011b and away from the first connection part 3012b, which means that the size of the cross section of the first clamping joint part 3012a close to the first connection part 3012b is larger than the size of the cross section away from the first connection part 3012b.

[0116] In some embodiments, the first clamp joint part 3012a can be hemispherical. The first clamp joint part 3012a has a first plane and a first curved surface, the first plane of the first clamp joint part 3012a is fixedly connected to the first connecting part 3012b, the first curved surface is connected to the first plane, and the first curved surface is protruded toward a side away from the first connecting part 3012b, so that when the first connecting member 301 and the second connecting member 302 are disassembled and connected, the first clamp joint part 3012a can be easily removed from the accommodating part 304 or introduced into the accommodating part 304, so as to improve the convenience of disassembly and connection of the first connecting member 301 and the second connecting member 302. In addition, when the first connecting member 301 and the second connecting member 302 are connected, the first connecting member 301 and the second connecting member 302 can be reliably connected through the first plane.

[0117] In some embodiments, the first clamp joint part 3012a can also be truncated cone-shaped, the first clamp joint part 3012a has a first plane, a second plane and a connecting curved surface connected between the first plane and the second plane, the first plane of the first clamp joint part 3012a is fixedly connected to the first connecting part 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 the connection between the first connector 301 and the second connector 302 is realized, the first clamp joint part 3012a can be conveniently introduced into the corresponding accommodating part 304 to improve the convenience of the connection between the first connector 301 and the second connector 302. And, when the first clamp joint part 3012a enters the corresponding accommodating part 304, the first connector 301 and the second connector 302 can be connected more reliably through the first plane.

[0118] In some embodiments, the first clamp joint part 3012a can also be a prism shape. The first clamp joint part 3012a has a first plane, a second plane and a plurality of sides connected between the first plane and the second plane. The first plane of the first clamp joint part 3012a is fixedly connected to the first connecting part 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 the connection of the first connector 301 and the second connector 302 is realized, the first clamp joint part 3012a can be conveniently introduced into the corresponding accommodating part 304 to improve the convenience of the connection of the first connector 301 and the second connector 302. And, when the first connector 301 and the second connector 302 are connected, the reliable connection of the first connector 301 and the second connector 302 can be realized through the first plane.

[0119] By gradually reducing the cross-sectional area of ​​the first clamping joint portion 3012a parallel to the second surface 3011b along the third direction Dr3 perpendicular to the second surface 3011b and away from the first connection portion 3012b, the first clamping joint portion 3012a can be conveniently introduced into the corresponding accommodating portion 304 when the first connection member 301 and the second connection member 302 are connected, so as to conveniently realize the clamping connection between the first connection member 301 and the second connection member 302.

[0120] Please continue reading Figure 5 In some embodiments, the number of second sub-connectors 3022 is multiple and they are spaced apart from each other. Any second sub-connector 3022 includes a second clamping joint portion 3022a and a second connecting portion 3022b. The second clamping joint portion 3022a is connected to the fourth surface 3021b through the second connecting portion 3022b. The minimum spacing between the two second clamping joint portions 3022a of any two adjacent second sub-connectors 3022 along the first direction Dr1 is smaller than the minimum spacing between the corresponding two second connecting portions 3022b along the first direction. The second clamping joint portion 3022a is used as a protrusion 303 to clamp the receiving portion 304 formed by the gap between the two adjacent first sub-connectors 3012, and the first clamping joint portion 3012a is used as a protrusion 303 to clamp the receiving portion 304 formed by the gap between the two adjacent second sub-connectors 3022.

[0121] The number of the second sub-connectors 3022 being multiple and being arranged at intervals from each other means that the orthographic projections of the multiple second sub-connectors 3022 on the fourth surface 3021b do not overlap. Each second sub-connector 3022 includes a second clamping joint portion 3022a and a second connecting portion 3022b, and the second clamping joint portion 3022a can be used as a protrusion 303 to cooperate with the receiving 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 connecting portion 3022b is a portion of the second sub-connector 3022 used to connect the second supporting layer 3021 and the second clamping joint portion 3022a. In some embodiments, the gap between two adjacent second sub-connectors 3022 can also form a receiving portion 304 to cooperate with the protrusion 303 in the first connecting member 301 to realize the clamping connection between the first connecting member 301 and the second connecting member 302.

[0122] In some embodiments, the second clamping joint portion 3022a and the second connecting portion 3022b are integrally formed so that the second sub-connector 3022 has better structural strength, thereby achieving reliable connection between the first connector 301 and the second connector 302 when the first connector 301 and the second connector 302 are connected.

[0123] Along the first direction Dr1 parallel to the second surface 3011b, the minimum spacing (abbreviated as the third spacing Lc) between the two second clamping joints 3022a of any two adjacent second sub-connectors 3022 is smaller than the minimum spacing (abbreviated as the fourth spacing Ld) between the corresponding two second connection parts 3022b, so that the accommodating portion 304 (abbreviated as the second accommodating portion 3042) formed by the gap between the two adjacent second sub-connectors 3022 can be divided into two interconnected parts according to their different sizes along the thickness direction of the connecting component 30.

[0124] Please continue to read Figure 5~Figure 6 The second receiving portion 3042 includes a third sub-receiving portion 3042a and a fourth sub-receiving portion 3042b which are connected to each other. The third sub-receiving portion 3042a is located between the second clamping joint portions 3022a of two adjacent second sub-connectors 3022, and the fourth sub-receiving 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-receiving portion 3042a has a third spacing Lc, and the fourth sub-receiving portion 3042b has a fourth spacing Ld, and the third spacing Lc is smaller than the fourth spacing Ld, so that the second clamping joint portion 3022a has a portion protruding from the second connecting portion 3022b along the first direction Dr1, that is, the size of the second clamping joint portion 3022a along the first direction Dr1 is larger than the size of the second connecting portion 3022b connected thereto. In this way, when the first connecting member 301 and the second connecting member 302 are clamped together, the portion of the second clamping joint 3022a that exceeds the first connecting member 3012b connected to it along the first direction Dr1 can be used to form a barrier for the first clamping joint 3012a located in the fourth sub-accommodating portion 3042b, so as to prevent the first clamping joint 3012a located in the fourth sub-accommodating portion 3042b from easily falling out of the fourth sub-accommodating portion 3042b, thereby improving the connection reliability between the first connecting member 301 and the second connecting member 302.

[0125] The second clamping joint part 3022a is formed by a gap between two adjacent first sub-connectors 3012 as a protrusion 303 clamped in the accommodating part 304, and the first clamping joint part 3012a is formed by a gap between two adjacent second sub-connectors 3022 as a protrusion 303 clamped in the accommodating part 304, which means that when the first connector 301 and the second connector 302 are connected, the second clamping joint part 3022a is located in the second sub-accommodating part 3041b, and the first clamping joint part 3012a is located in the fourth sub-accommodating part 3042b.

[0126] In some embodiments, when the first connector 301 and the second connector 302 are connected, the first clamping joint portion 3012a of any first sub-connector 3012 is located in the accommodating portion 304 formed by the gaps between the second connecting portions 3022b of multiple second sub-connectors 3022, and the second clamping joint portion 3022a of any second sub-connector 3022 is located in the accommodating portion 304 formed by the gaps between the first connecting portions 3012b of multiple first sub-connectors 3012, so that when a second sub-connector 3022 clamped with the first sub-connector 3012 is damaged, there are still multiple second sub-connectors 3022 clamped with the first sub-connector 3012, and / or, when a first sub-connector 3012 clamped with the second sub-connector 3022 is damaged, there are still multiple first sub-connectors 3012 clamped with the second sub-connectors 3022, so as to improve the connection reliability between the first sub-connector 3012 and the second sub-connector 3022.

[0127] In some embodiments, multiple second sub-connectors 3022 are arranged in an array along the fourth surface 3021b, so that when the first connector 301 and the second connector 302 are connected, the first clamping joint portion 3012a of any first sub-connector 3012 can be located in the accommodating portion 304 formed by the gaps between the second connecting portions 3022b of the multiple second sub-connectors 3022, and the second clamping joint portion 3022a of any second sub-connector 3022 can also be located in the accommodating portion 304 formed by the gaps between the first connecting portions 3012b of the multiple first sub-connectors 3012.

[0128] In some embodiments, the second connector 302 may also be configured in other forms that match the first connector 301. For example, the second connector 302 includes a second supporting layer 3021 and a second sub-connector 3022 connected to the second supporting layer 3021, the second sub-connector 3022 includes a second clamping joint portion 3022a and a second connecting portion 3022b, the second connecting portion 3022b is connected between the second supporting layer 3021 and the second clamping joint portion 3022a, so that there is a gap between the second clamping joint portion 3022a and the second supporting layer 3021. The second clamping joint portion 3022a is arranged parallel to the second supporting layer 3021, and a plurality of through holes penetrating the second supporting layer 3021 are arranged along the thickness direction of the second clamping joint portion 3022a to connect the gap between the second clamping joint portion 3022a and the second supporting layer 3021. When the first connector 301 and the second connector 302 are connected, the first clamping joint portion 3012a can enter the gap between the second clamping joint portion 3022a and the second supporting layer 3021 through the corresponding through hole to achieve clamping of the first connector 301 and the second connector 302.

[0129] By making the second connector 302 include a plurality of second sub-connectors 3022 spaced apart, and making the second snap-fit ​​joint portion 3022a snap-fit ​​into the accommodating portion 304 formed by the gap between two adjacent first sub-connectors 3012, and the first snap-fit ​​joint portion 3012a snap-fit ​​into the accommodating portion 304 formed by the gap between two adjacent second sub-connectors 3022, so that a plurality of first sub-connectors 3012 are snap-fitted into a plurality of second sub-connectors, it is beneficial to improve the connection reliability between the first connector 301 and the second connector 302.

[0130] Please continue reading Figure 5~Figure 6 According to some embodiments of the present application, the first connection portion 3012b is rod-shaped, and the first clamping joint portion 3012a is constructed to be able to swing through bending deformation of the first connection portion 3012b.

[0131] According to some embodiments of the present application, the second connection portion 3022b is rod-shaped, and the second clamping joint portion 3022a is configured to be able to swing through bending deformation of the second connection portion 3022b.

[0132] The first connection part 3012b being rod-shaped may mean that the first connection part 3012b is an elongated rod, for example, a cylindrical rod, a square rod, etc.

[0133] The first clamping joint portion 3012a is constructed to be able to swing through the bending deformation of the first connecting portion 3012b, which means that when the first connecting member 301 and the second connecting member 302 are connected or disassembled, the first connecting portion 3012b can bend and deform in a plane perpendicular to the second surface 3011b, thereby driving the first clamping joint portion 3012a to move in a plane perpendicular to the second surface 3011b, so that the first clamping joint portion 3012a can easily enter the corresponding accommodating portion 304 or escape from the corresponding accommodating portion 304.

[0134] The second connection part 3022b being rod-shaped may mean that the second connection part 3022b is an elongated rod, such as a cylindrical rod, a square rod, etc. The second connection part 3022b may be the same type of rod-shaped structure as the first connection part 3012b, or a different type of rod-shaped structure, which is not limited in the present application.

[0135] The second clamping joint portion 3022a is constructed to be able to swing through the bending deformation of the second connecting portion 3022b, which means that when the first connecting member 301 and the second connecting member 302 are connected or disassembled, the second connecting portion 3022b can bend and deform in a plane perpendicular to the fourth surface 3021b, thereby driving the second clamping joint portion 3022a to move in a plane perpendicular to the fourth surface 3021b, so that the second clamping joint portion 3022a can easily enter the corresponding accommodating portion 304 or escape from the corresponding accommodating portion 304.

[0136] In some embodiments, when the first connector 301 and the second connector 302 are connected or disassembled, the first clamping joint portion 3012a of the first connector 301 can be installed into the corresponding fourth sub-accommodation portion 3042b along the fifth direction Dr5 intersecting with the first direction Dr1 at room temperature, or the second connector 302 can be peeled off along the fifth direction Dr5 intersecting with the first direction Dr1 to remove the first clamping joint portion 3012a from the corresponding fourth sub-accommodation portion 3042b, so as to achieve the connection or disassembly of the first connector 301 and the second connector 302. The 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 connection or disassembly of the first connector 301 and the second connector 302, and reduce the impact on the battery cell 20 and the box body 10 when disassembling the first connector 301 and the second connector 302.

[0137] In addition, the first connector 301 and the second connector 302 can be disassembled at room temperature without separating the battery cell 20 and the box plate 101 in a high or low temperature environment, which is beneficial to avoid damage to the battery cell 20 or the box 10 caused by a high or low temperature environment, and can increase the probability of the battery cell 20 and the box 10 being reused.

[0138] In some embodiments, the first connection part 3012b and the second connection part 3022b are rod-shaped, the first clamping joint part 3012a is constructed to be able to swing through bending deformation of the first connection part 3012b, and the second clamping joint part 3022a is constructed to be able to swing through bending deformation of the second connection part 3022b.

[0139] By making the first connection part 3012b rod-shaped, the first clamping joint part 3012a is configured to be able to swing through the bending deformation of the first connection part 3012b, so that when the first connection member 301 and the second connection member 302 are clamped, the first clamping joint part 3012a can be easily inserted into the receiving part 304 formed by the gap between two adjacent second sub-connectors 3022 through the bending deformation of the first connection part 3012b. When the first connection member 301 and the second connection member 302 are disassembled, the first clamping joint can be easily disengaged from the receiving part 304 formed by the gap between two adjacent second sub-connectors 3022 through the bending deformation of the first connection part 3012b, so that the risk of damaging the first sub-connector 3012 when the first connection member 301 and the second connection member 302 are disassembled can be reduced while realizing the detachable connection between the first connection member 301 and the second connection member 302.

[0140] By making the second connection part 3022b into a rod shape, the second clamping joint part 3022a is configured to be able to swing through the bending deformation of the second connection part 3022b, so that when the first connection member 301 and the second connection member 302 are clamped, the second clamping joint part 3022a can be easily inserted into the receiving part 304 formed by the gap between two adjacent first sub-connectors 3012 through the bending deformation of the second connection part 3022b. When the first connection member 301 and the second connection member 302 are disassembled, the second clamping joint can be easily disengaged from the receiving part 304 formed by the gap between two adjacent first sub-connectors 3012 through the bending deformation of the second connection part 3022b, so that the risk of damaging the second sub-connector 3022 when the first connection member 301 and the second connection member 302 are disassembled can be reduced while realizing the detachable connection between the first connection member 301 and the second connection member 302.

[0141] Please continue reading Figure 5~Figure 7 According to some embodiments of the present application, in the clamped state, the projections of the first clamping joint portion 3012a and the adjacent second clamping joint portion 3022a on the second surface 3011b partially overlap, and the projections of the first connection portion 3012b and the adjacent second connection portion 3022b on the second surface 3011b are completely staggered.

[0142] In the locked state, the projections of the first locking joint portion 3012a and the adjacent second locking joint portion 3022a on the second surface 3011b partially overlap, and the projections of the first connection portion 3012b and the adjacent second connection portion 3022b on the second surface 3011b are completely staggered, which indicates that when the first connecting member 301 and the second connecting member 302 are locked, the positive projections of the first connection portion 3012b and the second connection portion 3022b on the second surface 3011b are alternately arranged, and the first locking joint portion 3012a and the second locking joint portion 3022a can form a barrier with each other to prevent the first locking joint portion 3012a and the second locking joint portion 3022a from easily falling out of the corresponding accommodating portion 304.

[0143] By making the projections of the first clamping joint portion 3012a and the adjacent second clamping joint portion 3022a on the second surface 3011b partially overlap in the clamped state, the projections of the first connection portion 3012b and the adjacent second connection portion 3022b on the second surface 3011b are completely staggered, so that the first clamping joint portion 3012a and the second clamping joint portion 3022a can be used to achieve reliable clamping of the first connecting member 301 and the second connecting member 302, 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 reserve corresponding accommodating spaces for the first clamping joint portion 3012a and the second clamping joint portion 3022a respectively.

[0144] Please continue reading Figure 5 According to some embodiments of the present application, the cross-sectional area of ​​the second clamping joint portion 3022a parallel to the fourth surface 3021b gradually decreases along a fourth direction Dr4 perpendicular to the fourth surface 3021b and away from the second connection portion 3022b.

[0145] The cross-sectional area of ​​the second clamping joint part 3022a parallel to the fourth surface 3021b gradually decreases along the fourth direction Dr4 perpendicular to the fourth surface 3021b and away from the second connection part 3022b, which means that the size of the cross section of the second clamping joint part 3022a close to the second connection part 3022b is larger than the size of the cross section away from the second connection part 3022b.

[0146] In some embodiments, the second clamp joint part 3022a can be hemispherical. The second clamp joint part 3022a has a third plane and a second curved surface, the third plane of the second clamp joint part 3022a is fixedly connected to the second connecting part 3022b, the second curved surface is connected to the third plane, and the second curved surface is protruded toward a side away from the second connecting part 3022b, so that when the first connecting member 301 and the second connecting member 302 are disassembled and connected, the second clamp joint part 3022a can be easily removed from the corresponding accommodating portion 304 or introduced into the corresponding accommodating portion 304, so as to improve the convenience of disassembly and connection of the first connecting member 301 and the second connecting member 302. In addition, when the first connecting member 301 and the second connecting member 302 are connected, the first connecting member 301 and the second connecting member 302 can be reliably connected through the third plane.

[0147] In some embodiments, the second clamp joint part 3022a can also be a truncated cone, the second clamp joint part 3022a has a third plane, a fourth plane and a connection surface connected between the third plane and the fourth plane, the third plane of the second clamp joint part 3022a is fixedly connected to the second connection part 3022b, and 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 the connection between the first connector 301 and the second connector 302 is realized, the second clamp joint part 3022a can be conveniently introduced into the corresponding accommodating part 304 to improve the convenience of the connection between the first connector 301 and the second connector 302. And, when the second clamp joint part 3022a enters the corresponding accommodating part 304, it can be blocked by the third plane and the corresponding first clamp joint part 3012a, so that the first connector 301 and the second connector 302 have a more reliable connection.

[0148] In some embodiments, the second clamp joint part 3022a can also be a prism shape. The second clamp joint part 3022a has a third plane, a fourth plane and a plurality of connection sides connected between the third plane and the fourth plane. The third plane of the second clamp joint part 3022a is fixedly connected to the second connection part 3022b, and 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 the connection between the first connector 301 and the second connector 302 is realized, the second clamp joint part 3022a can be conveniently introduced into the corresponding accommodating part 304 to improve the convenience of the connection between the first connector 301 and the second connector 302. And, when the first connector 301 and the second connector 302 are connected, the third plane can be blocked with the corresponding first clamp joint part 3012a to realize the reliable connection between the first connector 301 and the second connector 302.

[0149] In some embodiments, the first sub-connector 3012 and the second sub-connector 3022 have the same structure, so as to reduce the difficulty of manufacturing the connection assembly 30 .

[0150] By gradually reducing the cross-sectional area of ​​the second clamping joint portion 3022a parallel to the fourth surface 3021b along the fourth direction Dr4 perpendicular to the fourth surface 3021b and away from the second connection portion 3022b, the second clamping joint portion 3022a can be easily inserted into the corresponding accommodating portion 304 when the first connection member 301 and the second connection member 302 are clamped, thereby facilitating the connection between the first connection member 301 and the second connection member 302.

[0151] Please continue reading Figure 5~Figure 6 According to some embodiments of the present application, along the thickness direction of the connecting component 30, the size of the first clamping joint portion 3012a is smaller than the size of the second connecting portion 3022b, and the size of the second clamping joint portion 3022a is smaller than the size of the first connecting portion 3012b.

[0152] Along the thickness direction of the connecting component 30, the size of the first clamping joint portion 3012a (abbreviated as the first size S1) is smaller than the size of the second connecting portion 3022b (abbreviated as the second size S2), so that when the first connecting member 301 and the second connecting member 302 are clamped, the first clamping joint portion 3012a can have space to move along the thickness direction of the connecting component 30 in the fourth sub-accommodation portion 3042b.

[0153] Along the thickness direction of the connecting component 30, the size of the second snap-fit ​​joint portion 3022a (abbreviated as the third size S3) is smaller than the size of the first connecting portion 3012b (abbreviated as the fourth size S4), so that when the first connecting member 301 and the second connecting member 302 are snapped together, the second snap-fit ​​joint portion 3022a can have space to move along the thickness direction of the connecting component 30 in the second sub-accommodation portion 3041b.

[0154] By making the size of the first clamping joint part 3012a smaller than the size of the second connection part 3022b in the thickness direction of the connection component 30, and the size of the second clamping joint part 3022a smaller than the size of the first connection part 3012b, after the first connector 301 and the second connector 302 are clamped, the first clamping joint part 3012a and the second clamping joint part 3022a can move in the thickness direction of the connection component 30 in the corresponding accommodating part 304, thereby providing a buffer between the battery cell 20 and the box body 10 in scenes such as transporting the battery 100, which is beneficial to protecting the battery cell 20. Moreover, when the first connector 301 and the second connector are clamped and disassembled, a swinging space can be provided for the first clamping joint part 3012a and the second clamping joint part 3022a, so as to realize the disassembly of the first connector 301 and the second connector.

[0155] Please continue reading Figure 5~Figure 6 According to some embodiments of the present application, along the thickness direction of the connecting component 30, the size difference between the second connecting portion 3022b and the first card joint portion 3012a 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 3012b and the second card joint portion 3022a is greater than or equal to 0.15 cm and less than or equal to 0.4 cm.

[0156] Along the thickness direction of the connecting component 30, the size difference (abbreviated as the first size difference) between the second connecting portion 3022b and the first clamping joint portion 3012a refers to the difference between the size (i.e., the second size S2) of the second connecting portion 3022b along the thickness direction of the connecting component 30 and the size (i.e., the first size S1) of the first clamping joint portion 3012a along the thickness direction of the connecting component 30. Along the thickness direction of the connecting component 30, the size difference (abbreviated as the second size difference) between the first connecting portion 3012b and the second clamping joint portion 3022a refers to the difference between the size (i.e., the fourth size S4) of the first connecting portion 3012b along the thickness direction of the connecting component 30 and the size (i.e., the third size S3) of the second clamping joint portion 3022a along the thickness direction of the connecting component 30.

[0157] The greater the first size difference and the second size difference, the greater the thickness of the connection assembly 30, and the size of the battery 100 also increases, which is not conducive to improving the energy density of the battery 100. The smaller the first size difference and the second size difference, the smaller the effect of buffering the collision between the battery cell 20 and the box plate 101. Therefore, in order to reduce the impact of the connection assembly 30 on the energy density of the battery 100 while achieving the buffering effect between the battery cell 20 and the box plate 101, the first size difference is greater than or equal to 0.15 cm and less than or equal to 0.4 cm, and the second size difference is greater than or equal to 0.15 cm and less than or equal to 0.4 cm. In some embodiments, the first size 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 size difference is equal to 0.15 cm, 0.2 cm, 0.25 cm, 0.3 cm, 0.35 cm or 0.4 cm.

[0158] Since the first connector 301 and the second connector 302 are engaged, when buffering the impact force between the battery cell 20 and the box plate 101, the relative movement distance of the first connector 301 and the second connector 302 along the thickness direction of the connection assembly 30 depends on the smaller one of the first size difference and the second size difference. Therefore, in order to achieve the buffering effect between the battery cell 20 and the box plate 101 and reduce the influence of the connection assembly 30 on the size of the battery 100, the first size difference and the second size difference can be equal.

[0159] In some embodiments, along the thickness direction of the connection component 30, the size of the connection 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 connection component 30 on the size of the battery 100. The size of the connection component 30 along the thickness direction of the connection component 30 refers to the size from the first surface 3011a to the third surface 3021a when the first connection member 301 and the second connection member 302 are engaged.

[0160] By making the size difference between the second connection part 3022b and the first clamping joint part 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 connection part 3012b and the second clamping joint part 3022a greater than or equal to 0.15 cm and less than or equal to 0.4 cm along the thickness direction of the connection component 30, it is possible to provide a buffering effect between the battery cell 20 and the box body 10 while reducing the impact of the connection component 30 on the size of the battery 100.

[0161] Please continue reading Figure 5~Figure 6 In some embodiments, the minimum spacing between the two first clamping joints 3012a of any two adjacent first sub-connectors 3012 along the first direction is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

[0162] In some embodiments, the minimum spacing between the two second clamping joints 3022a of any two adjacent second sub-connectors 3022 along the first direction is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

[0163] In some embodiments, the minimum spacing between the first clamping joints 3012a of any two adjacent first sub-connectors 3012 along the first direction (ie, the first spacing La) may be equal to 0.5 mm, 0.8 mm, 1 mm, 1.2 mm or 1.5 mm.

[0164] In some embodiments, the minimum spacing (ie, the third spacing Lc) between the two second clamping joints 3022a of any two adjacent second sub-connectors 3022 along the first direction may be equal to 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, or 1.5 mm.

[0165] 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 is. 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 engaged. If the first spacing La is set too small, the difficulty of disassembly between the first connector 301 and the second connector 302 will increase. Therefore, in order to ensure that the first connector 301 and the second connector 302 have better connection reliability when engaged, and can also be easily disassembled, the first spacing La is equal to 1 mm.

[0166] 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 is. 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 engaged. If the third spacing Lc is set too small, the difficulty of disassembly between the first connector 301 and the second connector 302 will increase. Therefore, in order to ensure that the first connector 301 and the second connector 302 have better connection reliability when engaged, and can also be easily disassembled, the third spacing Lc is equal to 1 mm.

[0167] In some embodiments, the first spacing La may be equal to or different from the third spacing Lc. The first spacing La is equal to the third spacing Lc, which can facilitate the matching of the use of the first sub-connector 3012 and the second sub-connector 3022, thereby facilitating the connection reliability when the first connector 301 and the second connector 302 are connected.

[0168] It can be understood that since the first connecting member 301 and the second connecting member 302 are snap-connected, the size of the first plane of the first snap-connecting joint portion 3012a along the first direction Dr1 needs to be larger than the third spacing Lc, and the size of the third plane of the second snap-connecting joint portion 3022a along the first direction needs to be larger than the first spacing La, so that when the first connecting member 301 and the second connecting member 302 are snap-connected, the first snap-connecting joint portion 3012a and the second snap-connecting joint portion 3022a can block each other to ensure that the first connecting member 301 and the second connecting member 302 can be reliably connected.

[0169] The larger the distance between the boundary of the orthographic projection of the first clamping joint part 3012a on the second surface 3011b and the boundary of the orthographic projection of the first connecting part 3012b on the second surface 3011b, the larger the portion of the first clamping joint part 3012a that can be used to block the second clamping joint part 3022a when the first connecting member 301 and the second connecting member 302 are clamped, and the better the connection reliability of the first connecting member 301 and the second connecting member 302, but the greater the difficulty in disassembling the first connecting member 301 and the second connecting member 302. Therefore, in order to take into account the connection performance and disassembly performance of the first connecting member 301 and the second connecting member 302, the distance between the boundary of the orthographic projection of the first clamping joint part 3012a on the second surface 3011b and the boundary of the orthographic projection of the first connecting part 3012b on the second surface 3011b can be greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0170] Similarly, the larger the distance between the boundary of the orthographic projection of the second clamping joint part 3022a on the third surface 3021a and the boundary of the orthographic projection of the second connecting part 3022b on the third surface 3021a, the larger the portion of the second clamping joint part 3022a that can be used to block the first clamping joint part 3012a when the first connecting member 301 and the second connecting member 302 are clamped, and the better the connection reliability of the first connecting member 301 and the second connecting member 302, but the greater the difficulty in disassembling the first connecting member 301 and the second connecting member 302. Therefore, in order to take into account the connection performance and disassembly performance of the first connecting member 301 and the second connecting member 302, the distance between the boundary of the orthographic projection of the second clamping joint part 3022a on the third surface 3021a and the boundary of the orthographic projection of the second connecting part 3022b on the third surface 3021a can be greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0171] In some embodiments, the minimum spacing along the first direction between the two first clip joints 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 spacing along the first direction between the two second clip joints 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.

[0172] By making the minimum spacing between the two first clamping joints 3012a of any two adjacent first sub-connectors 3012 along the first direction greater than or equal to 0.5 mm and less than or equal to 1.5 mm, and the minimum spacing between the two second clamping joints 3022a of any two adjacent second sub-connectors 3022 along the first direction greater than or equal to 0.5 mm and less than or equal to 1.5 mm, the first connector 301 and the second connector 302 have better connection reliability when being clamped together and can also be easily disassembled.

[0173] Please continue reading Figure 5~Figure 6 In some embodiments, the minimum spacing between the 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.

[0174] In some embodiments, the minimum spacing between the 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.

[0175] The larger the second spacing Lb is, the fewer the number of first sub-connectors 3012 that can be arranged 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 clamped. If the second spacing Lb is set too small, the accommodation space of the second clamping joint 3022a will be reduced. When the first connector 301 and the second connector 302 are disassembled, it is not conducive to the second clamping joint 3022a to change its position in the accommodation portion 304 formed by the gap between the first connecting portions 3012b of two adjacent first sub-connectors 3012, which increases the difficulty of the second clamping joint 3022a to escape from the corresponding accommodation portion 304, which is easy to cause damage to the first sub-connector 3012 and / or the second sub-connector 3022. Therefore, in order to ensure that the first connector 301 and the second connector 302 have good connection reliability when they are connected, and to facilitate the disassembly of the first connector 301 and the second connector 302, and reduce the damage 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 second spacing Lb) between the first connecting 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.

[0176] Similarly, the larger the fourth spacing Ld is, the smaller the number of second sub-connectors 3022 that can be arranged on the fourth surface 3021b will be. The reduction in the number of second sub-connectors 3022 affects the connection reliability when the first connector 301 and the second connector 302 are engaged. If the fourth spacing Ld is set too small, the accommodation space of the first engaging joint 3012a will be reduced. When the first connector 301 and the second connector 302 are disassembled, it is not conducive to the first engaging joint 3012a to change its position in the accommodation portion 304 formed by the gap between the second connecting portions 3022b of two adjacent second sub-connectors 3022, which increases the difficulty of the first engaging joint 3012a to escape from the corresponding accommodation portion 304, and easily causes damage to the first sub-connector 3012 and / or the second sub-connector 3022. Therefore, in order to ensure that the first connector 301 and the second connector 302 have good connection reliability when they are connected, and to facilitate the disassembly of the first connector 301 and the second connector 302, and reduce the damage 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 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.

[0177] In some embodiments, the minimum spacing between the 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, and the minimum spacing between the 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.

[0178] By making the minimum spacing between the two first connection parts 3012b of any two adjacent first sub-connectors 3012 along 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 parts 3022b of any two adjacent second sub-connectors 3022 along the first direction greater than or equal to 1.5 mm and less than or equal to 3.5 mm, the first connector 301 and the second connector 302 have better connection reliability when they are snapped together, and the first connector 301 and the second connector 302 can be easily disassembled, and the damage to the first sub-connector 3012 and the second sub-connector 3022 caused during disassembly is reduced.

[0179] In some embodiments, the connection strength between the first connector 301 and the second connector 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 plate 101 and the second adhesive layer 50 .

[0180] The connection strength between the first connector 301 and the second connector 302 refers to the maximum external force that the first connector 301 and the second connector 302 can withstand when connected. The bonding strength between the first adhesive layer 40 and the battery cell 20 refers to the stress required to damage the interface between the battery cell 20 and the first adhesive layer 40 under the action of external force. The bonding strength between the box plate 101 and the second adhesive layer 50 refers to the stress required to damage the interface between the box plate 101 and the second adhesive layer 50 under the action of external force.

[0181] The connection strength between the first connector 301 and the second connector 302 is greater than the bonding strength between the first adhesive layer 40 and the battery cell 20, indicating that the first connector 301 and the second connector 302 can also be in a connected state after the battery cell 20 is separated from the first adhesive layer 40. The connection strength between the first connector 301 and the second connector 302 is greater than the bonding strength between the box plate 101 and the second adhesive layer 50, indicating that the first connector 301 and the second connector 302 can also be in a connected state after the box plate 101 and the second adhesive layer 50 are separated.

[0182] By making the connection strength between the first connector 301 and the second connector 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 plate 101 and the second adhesive layer 50, the first connector 301 and the second connector 302 can have a more reliable connection to prevent the battery cell 20 and the box body 10 from separating from each other in scenarios such as transporting the battery 100, which may affect the quality of the battery 100.

[0183] 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 plate 101 and the second adhesive layer 50 is greater than or equal to 7 MPa.

[0184] In some embodiments, the bonding strength between the first adhesive layer 40 and the battery cell 20 may be the same as or different from the bonding strength between the box 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.

[0185] In some embodiments, the connection strength between the first connector 301 and the second connector 302 is greater than 7 MPa, so that the connection strength between the first connector 301 and the second connector 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 plate 101 and the second adhesive layer 50.

[0186] By setting the bonding strength between the first adhesive layer 40 and the battery cell 20 and the bonding strength between the box plate 101 and the second adhesive layer 50 to be greater than or equal to 7 MPa, the battery cell 20 and the box body 10 are reliably connected to the connection assembly 30 .

[0187] In some embodiments, the material of the box plate 101 is steel or aluminum, and the surface of the box plate 101 facing the battery cell 20 is directly bonded to the second adhesive layer 50 .

[0188] The surface of the box plate 101 facing the battery cell 20 is directly bonded to the second adhesive layer 50 , which means that no insulating spray layer is provided between the surface of the box plate 101 facing the battery cell 20 and the second adhesive layer 50 .

[0189] Because a connecting component 30 is provided between the box plate 101 and the battery cell 20, insulation between the box plate 101 and the battery cell 20 can be achieved through the connecting component 30 without providing an insulating coating on the surface of the box plate 101. The surface of the box 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 plate 101 and the battery cell 20.

[0190] Please continue reading Figure 2 In some embodiments, the surface of the battery cell 20 facing the box plate 101 has an adhesive area 20a. The battery 100 includes an insulating film 1001, which is coated on the surface of the battery cell 20, and the insulating film 1001 includes a window portion 1001a, and the window portion 1001a exposes the adhesive area 20a. The first connector 301 is attached to the adhesive area 20a of the battery cell 20 through the first adhesive layer 40.

[0191] The adhesive region 20a is a region for interconnecting 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 referred to as blue glue or blue film. The window portion 1001a is a through hole that penetrates the insulating film 1001 along the thickness direction of the insulating film 1001 at a position corresponding to the adhesive region 20a.

[0192] Understandably, Figure 2FIG. 2 shows only the case where the pasting area 20 a is located at the bottom of the battery cell 20 . In some embodiments, the pasting area 20 a may be located at the side of the battery cell 20 .

[0193] By setting the insulating film 1001, the battery cell 20 has better insulation performance. By adhering the first adhesive layer 40 to the adhesive area 20a exposed by the window portion 1001a of the insulating film 1001, the first connector 301 is connected to the battery cell 20, so that the position of the battery cell 20 is fixed.

[0194] Please continue reading Figure 8 , Figure 8 This is a flow chart of a battery assembly method of some embodiments of the present application. The present application also provides a battery assembly method for assembling the battery 100 in the above embodiment. The battery assembly method includes: Step S10: providing a battery cell 20, a box body 10 and a connecting assembly 30; Step S20: using the first adhesive layer 40 to adhere the first connector 301 of the connector assembly 30 to the surface of the box plate 101 of the box body 10 of the battery cell 20; using the second adhesive layer 50 to adhere the second connector 302 of the connector assembly 30 to the surface of the box plate 101 of the box body 10 facing the battery cell 20; Step S30 : The first connector 301 is connected to the second connector 302 to assemble the battery cell 20 and the box body 10 .

[0195] The first connector 301 may include a first supporting layer 3011 and a first sub-connector 3012, wherein the first sub-connector 3012 is disposed on a second surface 3011b of the first supporting layer 3011, and the second surface 3011b faces the second connector 302. The first sub-connector 3012 includes a first clamping joint portion 3012a and a first connecting portion 3012b connected between the first clamping joint portion 3012a and the second surface 3011b.

[0196] The second connector 302 may include a second support layer 3021 and a second sub-connector 3022, wherein the second sub-connector 3022 is disposed on a fourth surface 3021b of the second support layer 3021, and the fourth surface 3021b faces the first connector 301. The second sub-connector 3022 includes a second clamping joint portion 3022a and a second connecting portion 3022b connected between the second clamping joint portion 3022a and the fourth surface 3021b. The second clamping joint portion 3022a is clamped to a receiving portion 304 formed by a gap between two adjacent first sub-connectors 3012, and the first clamping joint portion 3012a is clamped to a receiving portion 304 formed by a gap between two adjacent second sub-connectors 3022, so as to realize the clamping connection between the first connector 301 and the second connector 302.

[0197] Correspondingly, step S30 may include: Step S301 : fix the second connector 302 and install the first clamping joint 3012 a of the first connector 301 into the corresponding receiving portion 304 along a direction intersecting the fourth surface 3021 b of the second connector 302 to assemble the battery cell 20 and the box body 10 .

[0198] Step S301 may be performed at room temperature to avoid the influence of high or low temperature on the battery cells 20 and the housing 10 , which is beneficial to increase the probability of the battery cells 20 and the housing 10 being recycled.

[0199] When the first connecting member 301 and the second connecting member 302 are connected, the first connecting portion 3012b can be bent and deformed in a plane perpendicular to the second surface 3011b, thereby driving the first clamping joint portion 3012a to move in a plane perpendicular to the second surface 3011b, so that the first clamping joint portion 3012a can easily enter 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 joint portion 3022a to move in a plane perpendicular to the fourth surface 3021b, so that the second clamping joint portion 3022a can easily enter the corresponding receiving portion 304.

[0200] It should be noted that the order of the step of clamping the first connector 301 and the second connector 302 and step S20 can be exchanged. That is, the first connector 301 and the second connector 302 can be clamped first, and then the connection component 30 is adhered to the surface of the box plate 101 of the battery cell 20 facing the box body 10 using the first adhesive layer 40, and the connection component 30 is adhered to the surface of the box plate 101 of the box body 10 facing the battery cell 20 using the second adhesive layer 50, so as to assemble the battery cell 20 and the box body 10. In this way, it can be avoided that the battery cell 20 and the box body 10 hinder the process of clamping the first connector 301 and the second connector 302 when step S20 is performed first and then the first connector 301 and the second connector 302 are clamped.

[0201] It can be understood that the battery assembly method provided in the present application is used to assemble the battery 100 in the above embodiment. Therefore, the battery obtained by the assembly method has all the beneficial effects of the above battery 100, which will not be described in detail here.

[0202] In some embodiments, the present application also provides a battery disassembly method for disassembling the battery 100 in the above embodiment, and the disassembly method includes: Providing a battery 100; The second connection member 302 is peeled off in a direction intersecting the second surface 3011 b of the first connection member 301 to disassemble the battery cell 20 and the case 10 .

[0203] In some embodiments, in the step of peeling off the second connector 302 along the direction intersecting with the second surface 3011b of the first connector 301 to disassemble the battery cell 20 and the box body 10, the angle between the direction intersecting with 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 connector 301 and the second connector 302 and reduce the damage to the first connector 301 and the second connector 302 during the disassembly process. The first direction is parallel to the second surface 3011b.

[0204] In some embodiments, the step of peeling off the second connector 302 along a direction intersecting the second surface 3011 b of the first connector 301 to disassemble the battery cell 20 and the box body 10 may be performed at room temperature.

[0205] When the first connecting member 301 and the second connecting member 302 are disassembled, the first connecting portion 3012b may be bent and deformed in a plane perpendicular to the second surface 3011b, thereby driving the first clamping joint portion 3012a to move in a plane perpendicular to the second surface 3011b, so that the first clamping joint portion 3012a can easily enter the corresponding accommodation portion 304 or escape from the corresponding accommodation 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 joint portion 3022a to move in a plane perpendicular to the fourth surface 3021b, so that the second clamping joint portion 3022a can easily escape from the corresponding accommodation portion 304.

[0206] The battery disassembly method provided in the present application can realize the disassembly of the battery cell 20 and the box body 10 at room temperature, thereby avoiding the influence of high or low temperature on the battery cell 20 and the box body 10, which is beneficial to increase the probability of the battery cell 20 and the box body 10 participating in recycling.

[0207] 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.

[0208] Among them, electrical devices include transportation vehicles (such as vehicles, electric vehicles, ships, spacecraft, etc.), display devices (such as mobile phones, tablets, laptops, etc.), electric toys, electric tools, etc.

[0209] It can be understood that the electrical device provided in the present application uses any of the above-mentioned batteries 100, and therefore, the electrical device has all the beneficial effects of the above-mentioned batteries 100, which will not be described in detail here.

[0210] 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.

[0211] Energy storage devices may include, but are not limited to, centralized energy storage devices (such as container energy storage devices), distributed energy storage devices, mobile energy storage devices, wearable energy storage devices, and the like.

[0212] It can be understood that the energy storage device provided in the present application uses any of the above-mentioned batteries 100, and therefore, the energy storage device has all the beneficial effects of the above-mentioned batteries 100, which will not be described in detail here.

[0213] The battery 100 of the present application is further described below in conjunction with a specific implementation.

[0214] The battery 100 provided in the embodiment of the present application includes a battery cell 20 , a box body 10 , a connecting component 30 , a first adhesive layer 40 and a second adhesive layer 50 .

[0215] 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 with the battery cells 20 .

[0216] The connection assembly 30 includes a first connection member 301 and a second connection member 302 that are detachably connected. The first connection member 301 includes a first support layer 3011 and a plurality of first sub-connectors 3012. The first support layer 3011 includes a first surface 3011a and a second surface 3011b that are opposite to each other in the thickness direction. The first surface 3011a is bonded to the first adhesive layer 40, and the first sub-connectors 3012 are arranged on the second surface 3011b. The materials of the first support layer 3011 and the first sub-connectors 3012 are both insulating materials. Any first sub-connector 3012 includes a first clamping joint 3012a and a first connecting portion 3012b. The first clamping joint 3012a is connected to the second surface 3011b through the first connecting portion 3012b. The cross-sectional area of ​​the first clamping joint 3012a parallel to the second surface 3011b gradually decreases along a third direction perpendicular to the second surface 3011b and away from the first connecting portion 3012b. The minimum spacing between the two first clamping joints 3012a of any two adjacent first sub-connectors 3012 along the first direction parallel to the second surface 3011b is smaller than the minimum spacing between the two corresponding first connecting parts 3012b along the first direction. The first connecting part 3012b is rod-shaped, and the first clamping joint 3012a is configured to swing by bending and deforming the first connecting part 3012b.

[0217] The second connector 302 includes a second supporting layer 3021 and a plurality of second sub-connectors 3022. The second supporting layer 3021 includes a third surface 3021a and a fourth surface 3021b opposite to each other in the thickness direction, the third surface 3021a is bonded to the second adhesive layer 50, and the second sub-connectors 3022 are arranged on the fourth surface 3021b. Any second sub-connector 3022 includes a second clamping joint portion 3022a and a second connecting portion 3022b, the second clamping joint portion 3022a is connected to the fourth surface 3021b through the second connecting portion 3022b, and the cross-sectional area of ​​the second clamping joint portion 3022a parallel to the fourth surface 3021b gradually decreases along a fourth direction perpendicular to the fourth surface 3021b and away from the second connecting portion 3022b. The minimum spacing between the two second clamping joint portions 3022a of any two adjacent second sub-connectors 3022 along the first direction is less than the minimum spacing between the corresponding two second connecting portions 3022b along the first direction. The second connection portion 3022b is rod-shaped, and the second clamping joint portion 3022a is configured to be able to swing through bending deformation of the second connection portion 3022b.

[0218] Along the thickness direction of the connection assembly 30 , the size of the first clamping joint portion 3012 a is smaller than the size of the second connection portion 3022 b , and the size of the second clamping joint portion 3022 a is smaller than the size of the first connection portion 3012 b .

[0219] In the clamped state, the projections of the first clamping joint portion 3012a and the adjacent second clamping joint portion 3022a on the second surface 3011b partially overlap, and the projections of the first connection portion 3012b and the adjacent second connection portion 3022b on the second surface 3011b are completely staggered.

[0220] The first adhesive layer 40 is located between the first connector 301 and the battery cell 20, and the first connector 301 is adhered to the surface of the battery cell 20 facing the box plate 101 through the first adhesive layer 40. The second adhesive layer 50 is located between the second connector 302 and the box plate 101, and the second connector 302 is adhered to the surface of the box plate 101 facing the battery cell 20 through the second adhesive layer 50. The surface of the box plate 101 facing the battery cell 20 is directly bonded to the second adhesive layer 50. The connection strength between the first connector 301 and the second connector 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 plate 101 and the second adhesive layer 50.

[0221] The following is further described in conjunction with specific embodiments and comparative examples. As shown in Table 1 below, comparative example 1 and embodiment 1 use battery cells and boxes of the same specifications, 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 connecting bars to form the high-voltage output electrode of the battery, and the material of the box plate of the box is aluminum.

[0222] Among them, no connecting component is set in Comparative Example 1, and an insulating spray layer is provided on the surface of the box plate in Comparative Example 1. The adhesive layer is bonded to the insulating spray layer provided on the surface of the box plate, and the adhesive layer is bonded to the surface of the battery cell facing the box plate. The material of the adhesive layer is polyurethane, and the thickness of the adhesive layer is 0.5 mm.

[0223] In Example 1, the first connector 301 is adhered to the surface of the battery cell 20 facing the box plate 101 through the first adhesive layer 40, the second connector 302 is adhered to the surface of the box 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 plate 101 facing the battery cell 20. The thickness of the connecting component 30 is 0.5 cm, the material of the first support layer 3011, the second support layer 3021, the first sub-connector 3012 and the second sub-connector 3022 is polycarbonate, the material of the first adhesive layer 40 and the second adhesive layer 50 are both polyurethane, and the thickness of the first adhesive layer 40 and the second adhesive layer 50 are both 0.5 mm.

[0224] Voltages of 1000V and 2700V were applied between the high-voltage output electrode of the battery 100 in Example 1 and the housing 10, respectively; and voltages of 1000V and 2700V were applied between the high-voltage output electrode of the battery 100 in Comparative Example 1 and the housing 10, respectively. An insulation withstand voltage tester was used to verify the insulation performance of the battery 100, and the comparison results shown in Table 1 were obtained.

[0225]

[0226] According to Table 1, when the battery 100 of Example 1 includes the connection assembly 30, the second adhesive layer 50 is directly bonded to the box plate 101, and no insulating spray layer is provided between the box plate 101 and the second adhesive layer 50, and the insulation performance of the battery 100 can also meet the requirements. Moreover, a voltage of 2700V is applied between the high-voltage output pole of the battery 100 and the box 10, and the insulation performance of the battery 100 still meets the requirements.

[0227] In Comparative Example 1, since the adhesive layer cannot be coated 100% without bubbles, it is necessary to spray an insulating coating or an electrophoretic insulating layer on the battery cell and the box plate to achieve insulation safety protection of the battery under high voltage. However, according to Table 1, when a voltage of 1000V is applied between the high-voltage output pole of the battery 100 and the box 10 in Comparative Example 1, the insulation performance of the battery 100 can no longer meet the requirements. Moreover, the insulation yield of the spray insulating coating is low, the manufacturing process is complex, the cost is high, and the rework and scrap rate of the battery cell is high.

[0228] Therefore, the insulation performance of the battery 100 of Example 1 is significantly better than that of the comparative example 1. Therefore, by making the battery 100 include the connection assembly 30, and the connection assembly 30 includes the first connection member 301 and the second connection member 302 made of an insulating material, the double insulation of the battery 100 can be achieved, which greatly reduces the safety problems caused by poor insulation of the battery 100. In addition, when the battery 100 includes the connection assembly 30, there is no need to set an insulating spray layer on the surface of the box plate 101, which is conducive to saving preparation processes and reducing preparation costs.

[0229] In the technical solution of the embodiment of the present application, the first connector 301 is attached to the surface of the box plate 101 of the battery cell 20 facing the box 10 through the first adhesive layer 40, and the second connector 302 is attached to the surface of the box plate 101 facing the battery cell 20 through the second adhesive layer 50. On the basis of not changing the structure of the battery cell 20 and the box 10, the detachable design between the battery cell 20 and the box 10 can be realized by using the detachable connection of the first connector 301 and the second connector 302, so that the battery assembly can be manufactured using the existing preparation process as much as possible, which is conducive to cost saving. In addition, the connection component 30 is made of insulating material, which is conducive to improving the insulation performance of the battery 100.

[0230] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include: 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 The second adhesive layer is located between the second connecting member and the box body plate, and the second connecting member is adhered to the surface of the box body plate facing the battery cell through the second adhesive layer.

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

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 One of the first sub-connector and the second sub-connector is configured to have at least one protrusion; 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 protruding portion; Wherein, the first connecting member and the second connecting member are clamped together by the at least one protruding portion and the at least one accommodating portion.

5. The battery according to claim 4, characterized in that The number of the first sub-connectors is plural and they are arranged at intervals from each other; Any of the first sub-connectors includes a first clamping joint portion and a first connecting portion, and the first clamping joint portion is connected to the second surface through the first connecting portion; The first clamping joint portion forms the protruding portion, and / or the gap between two adjacent first sub-connectors forms the accommodating portion; Wherein, the minimum spacing between the two first clamping joints of any two adjacent first sub-connectors along the first direction parallel to the second surface is smaller than the minimum spacing between the corresponding two first connecting parts along the first direction.

6. The battery according to claim 5, characterized in that A plurality of the first sub-connectors are arranged in an array along the first direction and the second direction; The second direction is parallel to the second surface and intersects with the first direction.

7. The battery according to claim 5, 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.

8. The battery according to claim 5, characterized in that The number of the second sub-connectors is plural and they are arranged at intervals from each other; Any of the second sub-connectors comprises a second clamping joint portion and a second connecting portion, wherein the second clamping joint portion is connected to the fourth surface via the second connecting portion; The minimum spacing between the two second clamping joints of any two adjacent second sub-connectors along the first direction is smaller than the minimum spacing between the corresponding two second connecting parts along the first direction; Among them, the second clamping joint portion is a receiving portion formed by the protrusion clamped in the gap between two adjacent first sub-connectors, and the first clamping joint portion is a receiving portion formed by the protrusion clamped in the gap between two adjacent second sub-connectors.

9. The battery according to claim 8, 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.

10. The battery according to claim 8, 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.

11. The battery according to claim 8, 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.

12. The battery according to claim 8, 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.

13. The battery according to claim 12, 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.

14. The battery according to claim 8, characterized in that The minimum spacing between the two first clamping joints of any two adjacent first sub-connectors along the first direction 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.

15. The battery according to claim 8, characterized in that The minimum spacing between the two first connection parts of any two adjacent first sub-connectors along the first direction 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.

16. The battery according to any one of claims 1 to 15, 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.

17. The battery according to claim 16, 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.

18. The battery according to any one of claims 1 to 15, 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.

19. The battery according to any one of claims 1 to 15, 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.

20. A battery assembly method, characterized in that: Used for assembling a battery as claimed in any one of claims 1 to 19, 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.

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

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

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