Battery cell, battery and electric device

Abstract

The utility model discloses a battery cell, a battery and a power utilization device. The battery cell comprises a battery cell body, a first pole and a second pole. The first pole is arranged on the first side of the battery cell body; the second pole is arranged on the second side of the battery cell body; wherein one of the first pole and the second pole is of a convex structure, and the other one of the first pole and the second pole is of a concave structure matched with the convex structure. Through the structure, the battery cells can be directly connected in series or in parallel through the insertion connection of the groove structures and the convex structures, the battery cells do not need to be welded with the bar sheets, the bar sheets are omitted, the processing cost of the battery can be reduced, and the internal resistance between the battery cells is reduced. And on the other hand, the welding procedure does not exist, so that the problems of particle generation and hole explosion caused by welding do not exist, and the disassembly of each battery cell is also facilitated.

Description

Technical Field

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

[0002] The battery usually includes a box and a plurality of cells arranged in the box, and the plurality of cells are connected in series or in parallel to form a battery module. In the existing battery, each cell is connected with a bar through welding to achieve series or parallel connection between the cells. The connection method of the above-mentioned cells needs to be connected through a separate bar, which increases the cost and the internal resistance between the cells. Utility Model Content

[0003] In view of the above problems, the present application provides a battery cell, a battery and an electrical device, which can eliminate the provision of a tab, achieve connection between battery cells without welding, reduce the processing cost of the battery, and reduce the internal resistance between battery cells.

[0004] In order to solve the above technical problems, a technical solution adopted in the present application is to provide a battery cell, which includes: a battery cell body; a first pole, which is arranged on the first side of the battery cell body; a second pole, which is arranged on the second side of the battery cell body; wherein, one of the first pole and the second pole is a protruding structure, and the other of the first pole and the second pole is a recessed structure matching the protruding structure; a first boss is arranged on the first side of the battery cell body, and the first pole is arranged on the first boss, and a second boss is arranged on the second side of the battery cell body, and the second pole is arranged on the second boss; the heights of the first boss and the second boss are both greater than 0 mm and not greater than 10 mm.

[0005] The battery cells of the above structure can be directly connected in series or in parallel through the groove structure and the protrusion structure. There is no need to weld the battery cells to the tabs, and the tabs are eliminated, which can reduce the processing cost of the battery and the internal resistance between the battery cells. On the other hand, since there is no welding process, there will be no problems of particle generation and explosion holes caused by welding, and it is also convenient to disassemble each battery cell. The first boss and the second boss can reserve space for the battery cell to expand, and the space utilization rate will not be low after the battery cells are stacked due to the excessive height of the first boss and the second boss.

[0006] In a possible implementation manner, the height range of the first boss and the second boss are both 2 mm to 4 mm.

[0007] The above-mentioned size setting can better reserve space for battery cell expansion and improve space utilization.

[0008] In a possible implementation manner, the first side and the second side are two opposite sides of the battery cell body.

[0009] As mentioned above, the protruding structure and the recessed structure are arranged on opposite sides of the battery cell body, so that a plurality of battery cells can be stacked side by side.

[0010] In a possible implementation manner, the first side and the second side are two adjacent sides of the battery cell body.

[0011] As described above, multiple battery cells can be stacked together in another arrangement.

[0012] In a possible implementation manner, the protruding structure and the recessed structure are both cylindrical.

[0013] As described above, the cylindrical protruding structure and the concave structure are easy to align, making it convenient for the protruding structure to be inserted into the concave structure, and can improve the conductivity and reduce the generation of local hot spots.

[0014] In a possible implementation, the first boss is arranged at the edge of the first side, and the second boss is arranged at the edge of the second side; the battery cell further includes: a sampling portion, the sampling portion is arranged on the side wall of the first boss, and / or the sampling portion is arranged on the side wall of the second boss.

[0015] As mentioned above, the first boss and the second boss are both arranged at the edge of the side of the battery body, which can facilitate the connection of the sampling parts on several stacked battery cells to one sampling substrate.

[0016] In order to solve the above technical problems, another technical solution adopted in the present application is to provide a battery, which includes one or more battery cells, and the battery cells are the above-mentioned battery cells.

[0017] As described above, the battery cells can be directly connected in series or in parallel through the groove structure and the protrusion structure, without welding the battery cells to the tabs, eliminating the tabs, reducing the processing cost of the battery, and reducing the internal resistance between the battery cells. On the other hand, since there is no welding process, there will be no problems of particle generation and explosion holes caused by welding, and it is also convenient to disassemble the battery cells.

[0018] In a possible implementation, the battery includes a plurality of battery cells, the plurality of battery cells are arranged in parallel, and the protruding structures of the battery cells are inserted into the recessed structures of the adjacent battery cells.

[0019] As mentioned above, the battery can include a plurality of cells stacked in parallel and connected together.

[0020] In a possible implementation manner, the battery further includes: an elastic bonding portion, wherein the elastic bonding portion is disposed between two adjacent battery cells.

[0021] As described above, two adjacent battery cells can be bonded together by the elastic bonding portion, and the elastic bonding portion is elastic and can buffer the expansion of the battery cells.

[0022] In a possible implementation manner, there are one or more elastic bonding portions between two adjacent battery cells.

[0023] As mentioned above, when a plurality of elastic bonding parts are provided, the elastic bonding parts are not provided on the entire surface, which is beneficial to the heat dissipation of the battery cell.

[0024] In a possible implementation manner, the elastic bonding portion is in a strip shape.

[0025] As mentioned above, the elastic bonding part is in a strip shape, so that the elastic bonding part can not only play a bonding buffer effect, but also facilitate the heat dissipation of the battery core.

[0026] In a possible implementation manner, the battery further includes: one or more fasteners, wherein the fasteners are arranged around the plurality of battery cells arranged in parallel.

[0027] As mentioned above, the fasteners can fix the battery cells together and reduce the risk of deformation of the battery cells after expansion.

[0028] In a possible implementation, the battery further includes: an end plate, two end plates are respectively disposed at two ends of the plurality of battery cells arranged in parallel, and the fasteners are connected to the end plates.

[0029] As described above, the end plates are located at both ends of the multiple parallel battery cells, so that the stress of the fastener acts on the end plates instead of on the battery cells, which can protect the battery cells.

[0030] In a possible implementation manner, the battery further includes: a sampling substrate, wherein the sampling substrate is connected to the sampling parts of each of the battery cells.

[0031] As described above, the temperature, voltage and other data of each battery cell can be sampled through the sampling substrate, so as to facilitate monitoring of the status of the battery cell.

[0032] In order to solve the above technical problem, another technical solution adopted by the present application is to provide an electrical device, which includes a battery, and the battery is the above-mentioned battery, and the battery is used to provide electrical energy.

[0033] In the above-mentioned electrical device, the battery cells can be directly connected in series or in parallel through the groove structure and the protrusion structure. There is no need to weld the battery cells to the tabs, and the tabs are eliminated, which can reduce the processing cost of the battery and reduce the internal resistance between the battery cells. On the other hand, since there is no welding process, there will be no problems of particle generation and explosion holes caused by welding, and it is also convenient to disassemble each battery cell. 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, and 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

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments;

[0036] Figure 2 is a schematic structural diagram of a first side of a battery cell according to some embodiments;

[0037] Figure 3 for Figure 2 A schematic diagram of the structure of the second side of the battery cell;

[0038] Figure 4 is a schematic structural diagram of a first side and a second side of a battery cell according to some other embodiments;

[0039] Figure 5 is a schematic structural diagram of a first side of a battery cell according to some other embodiments;

[0040] Figure 6 for Figure 5 A schematic diagram of the structure of the second side of the battery cell;

[0041] Figure 7 is a schematic structural diagram of a first side of a battery cell according to some other embodiments;

[0042] Figure 8 for Figure 7 A schematic diagram of the structure of the second side of the battery cell;

[0043] Fig. 9 is a schematic structural diagram of a battery according to some embodiments;

[0044] Fig.10 for Fig. 9Schematic diagram of the structure of the first side of the battery cell.

[0045] Among them, 1000, vehicle; 200, controller; 300, motor; 100, battery; 110, battery cell; 111, battery cell body; 112, first side; 113, first boss; 114, raised structure; 115, second side; 116, second boss; 117, recessed structure; 120, elastic bonding portion; 130, end plate; 140, fastener; 150, sampling substrate; 160, gap. DETAILED DESCRIPTION

[0046] The following is a detailed description of the embodiments of the technical solution of the present application. 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.

[0047] 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.

[0048] 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, unless otherwise clearly and specifically defined, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two (including two), and "multiple pieces" refers to more than two (including two).

[0049] 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.

[0050] 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.

[0051] 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. They 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.

[0052] 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.

[0053] At present, from the perspective of market development, batteries are being used more and more widely. 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, the market demand is also constantly expanding.

[0054] The battery generally includes a box and a plurality of cells arranged in the box, and the plurality of cells are connected in series or in parallel to form a battery module. In the existing battery, each cell is connected with a bar through welding to realize the series or parallel connection between the cells. The connection method of the above-mentioned cells needs to be connected through a separate bar, which increases the cost and the internal resistance between the cells.

[0055] Based on the above considerations, in order to solve the technical problems in the prior art that battery cells need to be welded to tabs to achieve series or parallel connection between battery cells, the battery processing cost is high, and the internal resistance between battery cells is large, the present application proposes a battery cell, a battery and an electrical device, in which one of the first pole and the second pole of the battery cell is a protruding structure, and the other of the first pole and the second pole is a recessed structure, so that the two battery cells can be directly connected by inserting the protruding structure into the recessed structure.

[0056] 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.

[0057] Please refer to Figure 1 , Figure 1 is a schematic diagram of the structure of a vehicle according to one or more embodiments.

[0058] The 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 operating power requirements of the vehicle 1000 during driving.

[0059] 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.

[0060] In order to improve the performance of the electrical device, the present application provides a battery cell, please refer to Figure 2 and Figure 3 ; Figure 2 is a schematic structural diagram of a first side of a battery cell according to some embodiments; Figure 3 for Figure 2 Schematic diagram of the structure of the second side of the battery cell.

[0061] In some embodiments, the battery cell 110 includes a battery cell body 111, a first pole (not labeled), and a second pole (not labeled). The first pole is disposed on the first side 112 of the battery cell body 111. The second pole is disposed on the second side 115 of the battery cell body 111. Among them, one of the first pole and the second pole is a protruding structure 114, and the other of the first pole and the second pole is a recessed structure 117 that matches the protruding structure 114. A first boss 113 is disposed on the first side 112 of the battery cell body 111, and the first pole is disposed on the first boss 113. A second boss 116 is disposed on the second side 115 of the battery cell body 111, and the second pole is disposed on the second boss 116. The heights of the first boss 113 and the second boss 116 are both greater than 0 mm and not greater than 10 mm.

[0062] The battery cell body 111 is used for electrochemical reaction. It includes a shell (not marked), a positive electrode material (not marked) located on one side of the shell, and a negative electrode material (not marked) located on the other side of the shell. In this embodiment, the battery cell body 111 is in the shape of a rectangular parallelepiped. In some other embodiments, the battery cell body 111 may also be in the shape of a cylinder, a hexagonal prism, an irregular polygon, etc. In this embodiment, the first pole is the positive pole of the battery cell 110, and the first pole is connected to the positive electrode material in the shell, and the second pole is the negative pole of the battery cell 110, and the second pole is connected to the negative electrode material in the shell. In some other embodiments, the first pole may also be the negative pole of the battery cell 110, and the second pole may be the positive pole of the battery cell 110. In addition, the materials of the first pole and the second pole may include one or more of copper, aluminum, copper-aluminum alloy, etc. In this embodiment, the first pole is a convex structure 114, and the second pole is a concave structure 117. In some other embodiments, the first pole may be a recessed structure 117, and the second pole may be a raised structure 114. In this embodiment, the first side 112 and the second side 115 are opposite sides of the battery cell body 111. In some other embodiments, the first side 112 and the second side 115 may also be adjacent sides or any two sides of the battery cell body 111. The raised structure 114 cooperates with the recessed structure 117, which means that the raised structure 114 of one battery cell 110 can be plugged into the recessed structure 117 of another battery cell 110 to achieve the connection between the two battery cells 110.

[0063] Through the above structure, the battery cells 110 can be directly connected in series or in parallel through the groove structure and the protrusion structure 114, without welding the battery cells 110 and the tabs, eliminating the provision of the tabs, reducing the processing cost of the battery 100, and reducing the internal resistance between the battery cells 110. On the other hand, since there is no welding process, there will be no problems of particle generation and explosion holes caused by welding, and it is also convenient to disassemble each battery cell 110.

[0064] In the present embodiment, the first boss 113 and the second boss 116 are both in the shape of a cuboid. In some other embodiments, the first boss 113 and the second boss 116 may also be in the shape of a cylinder, a hexagonal prism, an irregular polygon, etc. In addition, in the present embodiment, the first boss 113 and the second boss 116 have the same shape, and in some other embodiments, the shapes of the first boss 113 and the second boss 116 may also be different. In the present embodiment, the height of the first boss 113 and the second boss 116 are the same, wherein the height of the first boss 113 refers to the size of the first boss 113 in the direction X perpendicular to the plane where the first side 112 is located; the height of the second boss 116 refers to the size of the second boss 116 in the direction X perpendicular to the plane where the second side 115 is located. In some other embodiments, the height of the first boss 113 and the second boss 116 may also be different. In the present embodiment, the first pole is a raised structure 114, and the second pole is a recessed structure 117. The height of the protruding structure 114 is the same as that of the recessed structure 117 . The height of the recessed structure 117 may be the same as that of the second boss 116 , or the height of the recessed structure 117 may be less than that of the second boss 116 .

[0065] The first pole is formed on the first boss 113, and the second pole is formed on the second boss 116. After the two battery cells 110 are connected together by plugging the protruding structure 114 into the recessed structure 117, there can be a gap between the two battery cells 110, and the size of the gap is equal to the sum of the heights of the first boss 113 and the second boss 116. The gap can reserve space for the battery cell 110 to expand, thereby reducing the risk of damage to the battery cell 110 after expansion.

[0066] The heights of the first boss 113 and the second boss 116 may be the same or different. The heights of the first boss 113 and the second boss 116 may be 10 mm, 8 mm, 5 mm, 3 mm, 1 mm, or other reasonable values. The height of the recessed structure 117 may be the same as the height of the second boss 116, or the height of the recessed structure 117 may be less than the height of the second boss 116. The height of the raised structure 114 is the same as the height of the recessed structure 117.

[0067] As described above, the first boss 113 and the second boss 116 can reserve space for the battery cell 110 to expand, and the space utilization rate of the battery cells 110 after being stacked will not be low due to the excessive height of the first boss 113 and the second boss 116 .

[0068] In some preferred embodiments, the height of the first boss 113 and the second boss 116 ranges from 2 mm to 4 mm.

[0069] The height of the first boss 113 and the second boss 116 can be 2 mm, 3 mm, 3.5 mm, 4 mm, etc. In this embodiment, the height of the first boss 113 and the second boss 116 are both 3 mm, the height of the first pole on the first boss 113 is 3 mm, and the height of the second pole on the second boss 116 is 3 mm.

[0070] The above-mentioned size setting can better reserve space for the battery cell 110 to expand and improve space utilization.

[0071] In some embodiments, the first side 112 and the second side 115 are two opposite sides of the battery cell body 111 .

[0072] In this embodiment, the battery cell body 111 is in the shape of a rectangular parallelepiped, and the battery cell body 111 includes three groups of opposite surfaces with different areas, and the first side 112 and the second side 115 are specifically the group of opposite surfaces with the largest area of ​​the battery cell body 111. The protruding structure 114 and the recessed structure 117 are respectively located on the two opposite surfaces with the largest area of ​​the battery cell body 111. This arrangement maximizes the space utilization after the battery cells 110 are stacked. In some other embodiments, the battery cell body 111 can be in the shape of a cylinder, and the first side 112 and the second side 115 can be specifically the two bottom surfaces of the battery cell body 111.

[0073] As mentioned above, the protruding structure 114 and the recessed structure 117 are disposed on two opposite sides of the battery cell body 111 , so that a plurality of battery cells 110 can be stacked side by side.

[0074] See also Figure 4 , Figure 4 Schematic diagram of the structure of the first side and the second side of the battery cell according to other embodiments. In other embodiments, the first side 112 and the second side 115 of the battery cell body 111 of the battery cell 110 can also be adjacent two sides of the battery cell body 111. By setting the first side 112 and the second side 115 as adjacent two sides of the battery cell body 111, multiple battery cells 110 can be arranged and stacked together in a horizontal and vertical direction, and the space utilization rate can be improved after the battery cells 110 are stacked.

[0075] Please continue reading Figure 2 and Figure 3 In some embodiments, both the protruding structure 114 and the recessed structure 117 are cylindrical.

[0076] The cylindrical protruding structures 114 and the concave structures 117 do not need additional alignment and can be plugged in, which facilitates the connection between the battery cells 110. The cylindrical protruding structures 114 and the concave structures 117 can make the current evenly distributed on the surfaces of the protruding structures 114 and the concave structures 117. After the protruding structures 114 and the concave structures 117 are plugged in, the conductive performance can be improved and the generation of local hot spots can be reduced. In some other embodiments, the protruding structures 114 and the concave structures 117 can also be in other reasonable shapes such as rectangular parallelepiped and prism. For example, please refer to Figure 5 and Figure 6 , Figure 5 is a schematic structural diagram of a first side of a battery cell according to some other embodiments; Figure 6 for Figure 5 Schematic diagram of the structure of the second side of the battery cell. Figure 5 and Figure 6 In the illustrated embodiment, the protruding structure 114 and the recessed structure 117 are in the shape of a rectangular parallelepiped. Figure 7 and Figure 8 , Figure 7 is a schematic structural diagram of a first side of a battery cell according to some other embodiments; Figure 8 for Figure 7 Schematic diagram of the structure of the second side of the battery cell. Figure 7 and Figure 8 In the illustrated embodiment, the protruding structure 114 and the recessed structure 117 are in the shape of triangular prisms.

[0077] As described above, the cylindrical protruding structure 114 and the recessed structure 117 are easy to align, which facilitates the insertion of the protruding structure 114 into the recessed structure 117 , and can improve the conductivity and reduce the generation of local hot spots.

[0078] Please continue reading Figure 2 and Figure 3 In some embodiments, the first boss 113 is disposed at an edge of the first side 112 , and the second boss 116 is disposed at an edge of the second side 115 ; the battery cell 110 further includes: a sampling portion disposed on a side wall of the first boss 113 , and / or a sampling portion disposed on a side wall of each second boss 116 .

[0079] The sampling part of the battery cell 110 is used to connect with the sampling substrate 150, so that the sampling substrate 150 can obtain the temperature, voltage and other data of the battery cell 110, facilitate monitoring the state of the battery cell 110, and can be processed in time when the state of the battery cell 110 is abnormal. Among them, the sampling part can be set on the side wall of the first boss 113, and the sampling part can also be set on the side wall of the second boss 116. Or the sampling part can be set on both the side wall of the first boss 113 and the side wall of the second boss 116. In addition, the sampling part is specifically set on the side wall of the first boss 113 facing away from the battery cell body 111, and / or the sampling part is set on the side wall of each second boss 116 facing away from the battery cell body 111. This setting makes it possible to connect the sampling parts of several stacked battery cells 110 through a sampling substrate 150. The sampling part can be specifically cylindrical, rectangular, irregular polygonal, etc.

[0080] As mentioned above, the first boss 113 and the second boss 116 are both disposed on the edge of the side of the battery cell body 111 , which can facilitate the connection of the sampling parts on a plurality of stacked battery cells 110 to a sampling substrate 150 .

[0081] The present application also provides a battery 100. Fig. 9 , Fig. 9 The battery 100 includes one or more battery cells 110. It should be noted that the battery cells 110 in this embodiment are the battery cells 110 described in the above embodiments, and will not be described one by one here.

[0082] As described above, the cells 110 in the battery 100 can be directly connected in series or in parallel through the groove structure and the protrusion structure 114, without welding the cells 110 to the tabs, eliminating the tabs, reducing the processing cost of the battery 100, and reducing the internal resistance between the cells 110. On the other hand, since there is no welding process, there will be no problems of particle generation and explosion holes caused by welding, and the disassembly of each cell 110 is also convenient.

[0083] In some embodiments, the battery 100 includes a plurality of battery cells 110 , the plurality of battery cells 110 are arranged in parallel, and the protruding structures 114 of the battery cells 110 are inserted into the recessed structures 117 of the adjacent battery cells 110 .

[0084] As described above, the battery 100 includes a plurality of battery cells 110 stacked in parallel. The battery cells 110 are directly stacked to form a battery module, which can improve space utilization.

[0085] In some embodiments, the protruding structure 114 of the battery cell 110 is disposed on the first boss 113 , and the recessed structure 117 is disposed on the second boss 116 of the battery cell 110 , so that after the battery cells 110 are stacked, there are gaps 160 between the battery cells 110 , and the gaps 160 can reserve space for the battery cells 110 to expand.

[0086] Please refer to Fig.10 , Fig.10 for Fig. 9 Schematic diagram of the structure of the first side of the battery cell.

[0087] In some embodiments, the battery 100 further includes an elastic adhesive portion 120 , which is disposed between two adjacent battery cells 110 .

[0088] The elastic bonding part 120 has elasticity and viscosity. By setting the elastic bonding part 120 on the side of the battery cell 110 and then plugging the protruding structure 114 and the recessed structure 117 of the two battery cells 110, the two battery cells 110 can be fixed together. In this embodiment, the elastic bonding part 120 is specifically MPP (Modified Polypropylene). In some other embodiments, the elastic bonding part 120 can also be polyethylene, polystyrene, etc.

[0089] As described above, two adjacent battery cells 110 can be bonded together by the elastic bonding portion 120 , and the elastic bonding portion 120 is elastic and can buffer the expansion of the battery cells 110 .

[0090] In some embodiments, there are one or more elastic bonding parts 120 between two adjacent battery cells 110 .

[0091] The elastic adhesive portion 120 may be provided singly, or a plurality of the elastic adhesive portions 120 may be provided at intervals.

[0092] In some preferred embodiments, the elastic adhesive portion 120 is in a strip shape. The elastic adhesive portion 120 is in a strip shape, so that the elastic adhesive portion 120 is not arranged on the entire side of the battery cell 110, which can be beneficial to the heat dissipation of the battery cell 110. In this embodiment, the strip-shaped elastic adhesive portion 120 is annular, and the elastic adhesive portion 120 is arranged along the edge of the side of the battery cell 110, wherein the first boss 113 and the second boss 116 are located outside the annular elastic adhesive portion 120. The annular elastic adhesive portion 120 is arranged along the side of the battery cell 110, so that the elastic adhesive portion 120 can also play a role in sealing the gap between two adjacent battery cells 110, so as to reduce the risk of impurities such as dust entering the gap between the two battery cells 110.

[0093] In some embodiments, the battery 100 further includes: one or more fasteners 140 , and the fasteners 140 are arranged around the plurality of battery cells 110 arranged in parallel.

[0094] The fastener 140 is specifically made of a rigid material and is annular. The fastener 140 may specifically be a steel strip or an aluminum alloy strip, etc. The fastener 140 surrounds the plurality of parallel battery cells 110 and is used to reduce the risk of the battery cells 110 expanding and deforming.

[0095] As described above, the fasteners 140 can fix the battery cells 110 together and reduce the risk of deformation of the battery cells 110 after expansion.

[0096] In some embodiments, the battery 100 further includes: end plates 130 , which are respectively disposed at two ends of the plurality of battery cells 110 arranged in parallel, and the fasteners 140 connect the end plates 130 .

[0097] The end plate 130 is used to prevent the force applied by the fastener 140 from directly acting on the battery cell 110, reduce the local pressure on the battery cell 110, and reduce the risk of damage to the battery cell 110 caused by the fastener 140 directly connecting the battery cell 110. The end plate 130 can be a rectangular body, a cylinder, an irregular polygon, etc. In this embodiment, the end plate 130 is a rectangular body structure with a notch, and the planar shape of the end plate 130 is the shape of the side of the battery cell 110 minus the first boss 113 and / or the second boss 116.

[0098] As described above, the end plates 130 are located at both ends of the plurality of battery cells 110 arranged in parallel, so that the stress of the fasteners 140 acts on the end plates 130 instead of on the battery cells 110 , thereby protecting the battery cells 110 .

[0099] In some embodiments, the battery 100 further includes a sampling substrate 150 , and the sampling substrate 150 is connected to the sampling parts of each battery cell 110 .

[0100] The sampling substrate 150 is a circuit board, and the sampling substrate 150 is connected to the sampling part on each battery cell 110. The sampling substrate 150 can sample the temperature, voltage and other data of each battery cell 110. When the state of the battery cell 110 is abnormal, it can be processed in time to reduce the risk of damage to the battery cell 110. In this embodiment, the sampling substrate 150 and each sampling part are fixed by dispensing glue. In some other embodiments, the sampling substrate 150 and each sampling part can also be fixed by welding.

[0101] The present application also provides an electric device, which includes a battery 100. It should be noted that the battery 100 in this embodiment is the battery 100 described in the above embodiment, and will not be described in detail here.

[0102] As described above, the cells 110 in the battery 100 can be directly connected in series or in parallel through the groove structure and the protrusion structure 114, without welding the cells 110 to the tabs, eliminating the tabs, reducing the processing cost of the battery 100, and reducing the internal resistance between the cells 110. On the other hand, since there is no welding process, there will be no problems of particle generation and explosion holes caused by welding, and the disassembly of each cell 110 is also convenient.

[0103] Finally, in a specific application scenario, the problem that the cells 110 of the existing battery 100 need to be welded together through a bar. The cell 110 of the present application includes: a cell body 111, a first pole and a second pole. The first pole is arranged on the first side 112 of the cell body 111; the second pole is arranged on the second side 115 of the cell body 111; wherein the first pole is a protruding structure 114, and the second pole is a recessed structure 117 that matches the protruding structure 114. A first boss 113 is arranged on the first side 112 of the cell body 111, and the first boss 113 forms a first pole. A second boss 116 is arranged on the second side 115 of the cell body 111, and the second boss 116 forms a second pole. The heights of the first boss 113 and the second boss 116 are both not greater than 10 mm. The first side 112 and the second side 115 are opposite sides of the cell body 111. The protruding structure 114 and the recessed structure 117 are both cylindrical. The first boss 113 is arranged at the edge of the first side 112, and the second boss 116 is arranged at the edge of the second side 115; the battery cell 110 further includes: a sampling portion, the sampling portion is arranged on the side wall of the first boss 113, and / or the sampling portion is arranged on the side wall of the second boss 116.

[0104] In the above manner, the cells 110 in the battery 100 can be directly connected in series or in parallel through the groove structure and the protrusion structure 114, without welding the cells 110 to the tabs, eliminating the tabs, reducing the processing cost of the battery 100, and reducing the internal resistance between the cells 110. On the other hand, since there is no welding process, there will be no problems of particle generation and explosion holes caused by welding, and it is also convenient to disassemble each cell 110.

[0105] 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 cell, characterized in that: The battery cell comprises: Battery cell body; A first pole, the first pole is arranged on a first side of the battery cell body; A second pole, the second pole is arranged on the second side of the cell body; wherein one of the first pole and the second pole is a protruding structure, and the other of the first pole and the second pole is a concave structure matched with the protruding structure; A first boss is provided on the first side of the cell body, the first pole is provided on the first boss, a second boss is provided on the second side of the cell body, the second pole is provided on the second boss; the heights of the first boss and the second boss are both greater than 0 mm and not greater than 10 mm.

2. The battery cell according to claim 1, characterized in that: The heights of the first boss and the second boss are both in the range of 2 mm to 4 mm.

3. The battery cell according to claim 1, characterized in that: The first side and the second side are two opposite sides of the battery cell body.

4. The battery cell according to claim 1, characterized in that: The first side and the second side are two adjacent sides of the battery cell body.

5. The battery cell according to claim 1, characterized in that: The protruding structure and the concave structure are both cylindrical.

6. The battery cell according to claim 1, characterized in that: The first boss is arranged at an edge of the first side, and the second boss is arranged at an edge of the second side; The battery cell also includes: A sampling portion, wherein the sampling portion is arranged on a side wall of the first boss, and / or the sampling portion is arranged on a side wall of the second boss.

7. A battery, characterized in that: The battery comprises one or more battery cells, and the battery cell is the battery cell according to any one of claims 1 to 6.

8. The battery according to claim 7, characterized in that The battery comprises a plurality of battery cells, the plurality of battery cells are arranged in parallel, and the protruding structures of the battery cells are inserted into the recessed structures of the adjacent battery cells.

9. The battery according to claim 7, characterized in that The battery also includes: An elastic bonding portion is provided between two adjacent battery cells.

10. The battery according to claim 9, characterized in that There are one or more elastic bonding parts between two adjacent battery cells.

11. The battery according to claim 10, characterized in that The elastic bonding portion is in a strip shape.

12. The battery according to claim 7, characterized in that The battery also includes: One or more fasteners are arranged around the plurality of battery cells arranged in parallel.

13. The battery according to claim 12, characterized in that The battery also includes: The end plates are respectively arranged at two ends of the plurality of battery cells arranged in parallel, and the fasteners are connected to the end plates.

14. The battery according to claim 7, characterized in that The battery also includes: A sampling substrate is connected to the sampling parts of the battery cells.

15. An electrical device, characterized in that: The electrical device comprises the battery according to any one of claims 9 to 14, and the battery is used to provide electrical energy.

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