Battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery which comprises a battery cell, an adapter plate and a high-temperature expansion layer, the battery cell comprises a battery cell body and a battery cell tab arranged on the battery cell body; the adapter piece comprises a first connecting part and a second connecting part which are connected, the first connecting part is arranged at the top of the battery cell body at an interval, the battery cell tab is bent and connected to the first connecting part, and the second connecting part is configured to be connected with a pole of a battery; the high-temperature expansion layer is arranged on one side, facing the battery cell body, of the first connecting part, and the volume is increased when the high-temperature expansion layer reaches a preset temperature. When the internal temperature of the battery rises to a dangerous temperature, the battery can quickly cut off the electric connection between the tab of the battery cell and the battery cell connecting piece, so that the safety performance of the battery is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery. BACKGROUND

[0002] The battery includes a shell and an electric core located inside the shell. The battery can be divided into a square battery, a cylindrical battery, or a soft package battery, and is widely used in the fields of notebook computers, mobile power sources, electric tools, and electric vehicles.

[0003] When the battery is in an overheated condition, a series of chemical reactions will occur inside the battery, including decomposition of SEI film, electrolyte, and electrode at a high temperature higher than 90 DEG C, softening and even melting of the separator, and simultaneous release of a large amount of heat, which causes the battery to have accidents such as thermal runaway, smoke, fire, and explosion, and poses a great threat to the safety of people's lives and property.

[0004] Therefore, there is an urgent need for a battery to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a battery which can quickly block the electrical connection between the tab of the electric core and the connecting piece of the electric core when the temperature inside the battery rises to a dangerous temperature, thereby effectively improving the safety performance of the battery.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The battery comprises:

[0008] The electric core comprises an electric core body and an electric core tab provided on the electric core body.

[0009] The adapter piece comprises a first connecting part and a second connecting part connected to each other, the first connecting part is arranged at the top of the electric core body, the electric core tab is bent and connected to the first connecting part, and the second connecting part is configured to connect the pole of the battery.

[0010] The high-temperature expansion layer is arranged on the side of the first connecting part facing the electric core body, and the high-temperature expansion layer increases in volume when reaching a preset temperature.

[0011] Optionally, the high-temperature expansion layer comprises a protective film, an initiator, and a high-temperature polymerization monomer, and the protective film is coated outside the initiator and the high-temperature polymerization monomer.

[0012] Optionally, the protective film is made of PET, PE, or PP material.

[0013] Optionally, the electric core tab and the high-temperature expansion layer are arranged on the upper and lower sides of the first connecting part.

[0014] Optionally, a portion of the electrode tab of the battery cell is connected to an upper surface of the first connecting portion, another portion of the electrode tab of the battery cell is connected to a lower surface of the first connecting portion, and the high-temperature expansion layer is arranged on a side of the electrode tab of the battery cell facing the battery cell body.

[0015] Optionally, a projection of a connecting surface between the electrode tab of the battery cell and the first connecting portion in the thickness direction of the adapter plate at least partially overlaps a projection of the high-temperature expansion layer in the thickness direction of the adapter plate.

[0016] Optionally, a projection of the high-temperature expansion layer in the thickness direction of the adapter plate completely covers a projection of a connecting surface between the electrode tab of the battery cell and the first connecting portion in the thickness direction of the adapter plate.

[0017] The area of the projection of the high-temperature expansion layer in the thickness direction of the adapter plate is S1, the area of the projection of the connecting surface between the electrode tab of the battery cell and the first connecting portion in the thickness direction of the adapter plate is S2, and S1 / S2 is (3-12):1.

[0018] Optionally, the battery cell group at least includes a first battery cell assembly and a second battery cell assembly, the first battery cell assembly includes a first battery cell body and a first battery cell tab, the second battery cell assembly includes a second battery cell body and a second battery cell tab, the first battery cell body and the second battery cell body are arranged in a stack, and the first battery cell tab and the second battery cell tab are connected through the first connecting portion.

[0019] Optionally, the first battery cell tab includes a first battery cell positive tab and a first battery cell negative tab, the second battery cell tab includes a second battery cell positive tab and a second battery cell negative tab, the adapter plate includes a positive connecting plate and a negative connecting plate, the first battery cell positive tab and the second battery cell positive tab are connected through the positive connecting plate, and the first battery cell negative tab and the second battery cell negative tab are connected through the negative connecting plate.

[0020] Optionally, the battery further includes:

[0021] A shell is arranged to accommodate the battery cell, and an opening is arranged at the top of the shell.

[0022] A cover plate is connected to the shell in a buckling manner, and the opening can be closed by the cover plate, a pole is arranged on the cover plate, and the pole is connected to the second connecting portion of the adapter plate.

[0023] The utility model discloses the beneficial effects of:

[0024] The battery provided by the utility model, the cell body is electrically connected to the external power consumption equipment through the cell tab, the first connecting part, the second connecting part and the pole of the battery in sequence, so that the transmission of electric energy is realized. The first connecting part is arranged at the top of the cell body in a spaced manner, the cell tab is bent and connected to the first connecting part, and the high-temperature expansion layer is arranged on the side of the first connecting part facing the cell body. That is to say, the high-temperature expansion layer is arranged between the first connecting part and the top of the cell body. When the temperature in the cell rises to the preset temperature, the volume of the high-temperature expansion layer increases, the high-temperature expansion layer pushes the first connecting part, so that the first connecting part moves away from the cell body. During the movement of the first connecting part, the connection between the first connecting part and the cell tab is gradually disconnected, so that the circulation of electric current is effectively blocked, and the safety during use of the cell is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the utility model embodiment, the drawings needed to be used in the description of the utility model embodiment will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the utility model embodiment and the drawings for those skilled in the art without creating labor.

[0026] Figure 1 It is the sectional view of the cell provided by the utility model embodiment.

[0027] Figure 2 It is the relative position structure diagram when the first cell assembly, the second cell assembly and the adapter piece are assembled.

[0028] Figure 3 It is the structure schematic diagram of the adapter piece connecting the first cell tab and the second cell tab respectively.

[0029] Figure 4 It is the structure schematic diagram of the cell and the cover plate of the battery after being connected.

[0030] Figure 5 It is the structure schematic diagram of the first cell assembly and the second cell assembly after being combined.

[0031] Figure 6 It is the structure schematic diagram of the first cell assembly and the second cell assembly after being wrapped with the insulating film layer.

[0032] Figure 7 It is the structure schematic diagram of the battery provided by the utility model embodiment.

[0033] In the drawings:

[0034] 101, housing; 102, cover plate; 103, pole;

[0035] 1, first battery cell assembly; 11, first battery cell body; 12, first battery cell tab; 121, first battery cell positive tab; 122, first battery cell negative tab;

[0036] 2, second battery cell assembly; 21, second battery cell body; 22, second battery cell tab; 221, second battery cell positive tab; 222, second battery cell negative tab;

[0037] 3, adapter piece; 31, positive connection piece; 311, first positive connection part; 312, second positive connection part; 32, negative connection piece; 321, first negative connection part; 322, second negative connection part;

[0038] 4, high-temperature expansion layer;

[0039] 6, insulation film layer. DETAILED DESCRIPTION

[0040] The technical solutions of the present application will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0041] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0043] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, thus, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] In the description of the utility model, it needs to explain, the term "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, or is the orientation or position relation of the utility model product when using commonly placed, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, construct and operate with a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0045] In the description of the utility model, it also needs to explain, unless otherwise specified and limited, the terms "set", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0046] In the utility model, unless otherwise specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0047] In the description of the utility model, the term "and / or" is only a description of the association between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the utility model generally indicates that the front and rear associated objects have an "or" relationship.

[0048] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as a limitation on the utility model.

[0049] As Figure 1 And Figure 7As shown, the battery provided in the embodiment includes a shell 101, a cover plate 102, a battery cell, a transition piece 3 and a high-temperature expansion layer 4. The shell 101 is provided with an opening at the top, and the shell 101 is used to accommodate the battery cell. The cover plate 102 is connected to the shell 101 by snap-fit, and can close the opening. The cover plate 102 is provided with a pole 103, and the pole 103 is connected to an external power-consuming device. When the temperature rises to a dangerous temperature, the battery can quickly block the electrical connection between the battery tab and the transition piece 3, thereby effectively improving the safety performance of the battery during use.

[0050] Specifically, as shown in the drawings, Figure 1 the battery cell includes a battery cell body and a battery tab provided on the battery cell body. In the embodiment, referring to Figure 2 , the battery cell is a winding type battery cell structure. Of course, in other embodiments, the battery cell can also be a laminated type battery cell structure, which is not limited here. The transition piece 3 includes a first connecting portion and a second connecting portion connected to each other. The first connecting portion is arranged at the top of the battery cell body in a spaced manner. The battery tab is bent and connected to the first connecting portion. The second connecting portion is configured to connect the pole 103 of the battery. That is, the battery cell body is electrically connected to the external power-consuming device through the battery tab, the first connecting portion, the second connecting portion and the pole 103 of the battery in sequence, thereby realizing the transmission of electric energy.

[0051] Further, the high-temperature expansion layer 4 is arranged on the side of the first connecting portion facing the battery cell body. The high-temperature expansion layer 4 increases in volume when it reaches a preset temperature. It can be understood that the preset temperature is the dangerous temperature mentioned above, that is, the temperature when the battery is out of control or the overheat temperature of the battery cell. The preset temperature is determined by experiment according to parameters such as the type and specifications of the battery cell, which is not described here.

[0052] Specifically, the high-temperature expansion layer 4 includes a protective film, an initiator and a high-temperature polymerization monomer. The protective film is coated on the initiator and the high-temperature polymerization monomer to avoid contact between the initiator and the high-temperature polymerization monomer and the battery cell body or the battery tab, which affects the use of the battery cell in a low-temperature or normal-temperature environment. Exemplarily, the material of the protective film can be selected from PET, PE or PP. The initiator functions to initiate the polymerization reaction of the high-temperature polymerization monomer. In the embodiment, the initiator mainly includes any one or a combination of at least two of benzoyl peroxide, azobisisobutyronitrile, dimethyl azobisisobutyrate or azobisisoheptyl cyanide. The high-temperature polymerization monomer mainly includes a bismaleimide monomer, an acrylic monomer or a vinyl siloxane monomer, etc.

[0053] Preferably, the high-temperature expansion layer 4 further includes a solvent. The solvent is arranged in the protective film, and the solvent can include at least one of an ether solvent, a phosphate, a carbonate and a carboxylate.

[0054] In the present embodiment, the high-temperature expansion layer 4 is arranged between the first connecting portion and the top of the battery cell body. When the temperature in the battery cell rises to a preset temperature, the initiator in the protective film decomposes and activates, and induces the high-temperature polymerization monomers in the solvent to undergo a thermal free radical polymerization reaction, so that the volume of the high-temperature expansion layer 4 increases. After the volume of the high-temperature expansion layer 4 increases, the first connecting portion is pushed, so as to move away from the battery cell body. During the movement of the first connecting portion, the connection between the first connecting portion and the battery cell tab is gradually disconnected, so as to effectively block the flow of current, and ensure the safety of the battery cell during use.

[0055] It can be understood that there are three connection modes between the battery cell tab and the first connecting portion of the adapter sheet 3, i.e., the battery cell tab is connected to the upper side surface (the side away from the battery cell body) of the first connecting portion, the battery cell tab is connected to the lower side surface (the side towards the battery cell tab) of the first connecting portion, and part of the battery cell tab is connected to the upper side surface of the first connecting portion, and the other part is connected to the lower side surface of the first connecting portion. Preferably, when the battery cell tab is connected to the upper side surface of the first connecting portion, and the high-temperature expansion layer 4 is connected to the lower side surface of the first connecting portion, during the process that the volume of the high-temperature expansion layer 4 increases when reaching the preset temperature, the battery cell tab and the first connecting portion are subjected to tension, and are more likely to be disconnected. Of course, the battery cell tab and the high-temperature expansion layer 4 can also be arranged on the lower side surface of the first connecting portion, or part of the battery cell tab is connected to the upper side surface of the first connecting portion, and the other part is connected to the lower side surface of the first connecting portion, and the high-temperature expansion layer 4 is arranged on the side of the battery cell tab towards the battery cell body, as long as the volume of the high-temperature expansion layer 4 increases when reaching the preset temperature, and the first connecting portion can be pushed away from the battery cell body.

[0056] Optionally, in order to make the pushing force of the high-temperature expansion layer 4 when the volume increases be able to pull apart the connection position of the first connecting portion and the battery cell tab, it is necessary to ensure that the projection of the connection surface between the battery cell tab and the first connecting portion in the thickness direction of the adapter sheet 3 at least partially coincides with the projection of the high-temperature expansion layer 4 in the thickness direction of the adapter sheet 3. In this way, the pushing force of the high-temperature expansion layer 4 can directly act on the connection surface between the battery cell tab and the first connecting portion, and the battery cell tab and the first connecting portion can be disconnected during the process that the volume of the high-temperature expansion layer 4 gradually increases. It should be noted that the connection surface between the battery cell tab and the first connecting portion is the welding mark formed by welding the battery cell tab and the first connecting portion. That is, the projection of the welding mark formed by welding the battery cell tab and the first connecting portion in the thickness direction of the adapter sheet 3 at least partially coincides with the projection of the high-temperature expansion layer 4 in the thickness direction of the adapter sheet 3.

[0057] Preferably, the projection of the high-temperature expansion layer 4 in the thickness direction of the adapter piece 3 completely covers the projection of the connecting surface between the tab and the first connecting portion in the thickness direction of the adapter piece 3. The area of the projection of the high-temperature expansion layer 4 in the thickness direction of the adapter piece 3 is S1, the area of the projection of the connecting surface between the tab and the first connecting portion in the thickness direction of the adapter piece 3 is S2, and S1 / S2 is (3-12):1.

[0058] It should be noted that the number of the battery cells in the battery shell 101 can be one, two, three or more, which can be determined according to the needs, and is not limited herein. In the following, the structure and assembly process of the battery are described in detail by taking the battery with two battery cells as an example.

[0059] Continuing to refer to Figure 1 , the battery cell includes a first battery cell assembly 1 and a second battery cell assembly 2. The first battery cell assembly 1 includes a first battery cell body 11 and a first battery cell tab 12, and the second battery cell assembly 2 includes a second battery cell body 21 and a second battery cell tab 22. Figures 2-6 The structure step diagram of the battery cell generated by the first battery cell assembly 1 and the second battery cell assembly 2 provided in the embodiment is shown. In the embodiment, the first battery cell assembly 1 and the second battery cell assembly 2 are both wound battery cells, and the first battery cell body 11 and the second battery cell body 21 are arranged in a stacked manner after being combined, and the first battery cell tab 12 and the second battery cell tab 22 are connected through the first connecting portion.

[0060] Specifically, the first battery cell tab 12 and the second battery cell tab 22 are respectively bent towards each other and symmetrically connected on both sides of the first connecting portion. Preferably, the first connecting portion is connected with the first battery cell tab 12 and the second battery cell tab 22 through ultrasonic welding. The first battery cell tab 12 and the second battery cell tab 22 are respectively welded to both sides of the first connecting portion, which not only helps to reduce the welding difficulty, but also helps to reduce the thickness of the first connecting portion after welding, reduce the overall height of the battery cell, and improve the space utilization in the battery.

[0061] Further specifically, referring to Figure 2 and Figure 3 , the first battery cell tab 12 includes a first battery cell positive tab 121 and a first battery cell negative tab 122, and the second battery cell tab 22 includes a second battery cell positive tab 221 and a second battery cell negative tab 222. Correspondingly, the adapter piece 3 includes a positive connecting piece 31 and a negative connecting piece 32, the first battery cell positive tab 121 and the second battery cell positive tab 221 are connected through the positive connecting piece 31, and the first battery cell negative tab 122 and the second battery cell negative tab 222 are connected through the negative connecting piece 32.

[0062] More specifically, the positive connection sheet 31 includes a first positive connection portion 311 and a second positive connection portion 312, and the negative connection sheet 32 includes a first negative connection portion 321 and a second negative connection portion 322. The first positive connection portion 311 connects the first cell positive tab 121 and the second cell positive tab 221, and the first negative connection portion 321 connects the first cell negative tab 122 and the second cell negative tab 222. The second positive connection portion 312 and the second negative connection portion 322 are respectively arranged on the side of the first positive connection portion 311 and the first negative connection portion 321 away from each other, and the second positive connection portion 312 is used to connect the positive pole of the battery, and the second negative connection portion 322 is used to connect the negative pole of the battery. In this embodiment, the second positive connection portion 312 is laser-welded to the positive pole of the battery, and the second negative connection portion 322 is laser-welded to the negative pole of the battery.

[0063] Optionally, the cell further includes an insulating film layer 6, which is wrapped outside the cell body. The insulating film layer 6 uses a Mylar film in the prior art, which is a tough polyester film with good heat resistance and mechanical flexibility.

[0064] The manufacturing process of the battery provided in this embodiment is as follows:

[0065] First, the first cell assembly 1, the second cell assembly 2, the positive connection sheet 31 and the negative connection sheet 32 are provided. The first cell assembly 1 and the second cell assembly 2 are placed symmetrically, wherein the first cell positive tab 121 and the second cell positive tab 221 are directly opposite, and the first cell negative tab 122 and the second cell negative tab 222 are directly opposite. For details, please refer to Figure 2 .

[0066] Second, the adapter sheet 3 is ultrasonically welded. The first cell positive tab 121 and the second cell positive tab 221 are connected by the first positive connection portion 311, and the first cell negative tab 122 and the second cell negative tab 222 are connected by the first negative connection portion 321, as shown in Figure 3 , where the shaded part on the tab represents the ultrasonic welding area.

[0067] Then, the high-temperature expansion layer 4 is installed. The high-temperature expansion layer 4 is arranged on the side of the positive connection sheet 31 and the negative connection sheet 32 away from the cell tabs, for example, the high-temperature expansion layer 4 can be fixed by gluing.

[0068] Next, the adapter sheet is laser welded. The second positive connection portion 312 and the second negative connection portion 322 are respectively laser-welded to the positive and negative poles of the battery. As shown in Figure 4As shown, the black circular rings on the second positive electrode connecting part 312 and the second negative electrode connecting part 322 are soldering marks, indicating that the second positive electrode connecting part 312 and the second negative electrode connecting part 322 are respectively soldered and connected with the battery cover plate 102.

[0069] Next, the core is wrapped with a film. Figure 5 The first battery core assembly 1 and the second battery core assembly 2 are respectively folded away from the battery cover plate 102, so that the large faces of the first battery core assembly 1 and the second battery core assembly 2 are attached. Figure 6 As shown, the Mylar film is wrapped outside the first battery core assembly 1 and the second battery core assembly 2 to form an insulating film layer 6.

[0070] Finally, the battery is put into the shell. The first battery core assembly 1 and the second battery core assembly 2 wrapped with the insulating film layer 6 are put into the shell 101, and the cover plate 102 is sealed and connected with the shell 101 to complete the assembly of the battery.

[0071] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A battery, characterized in that, include: A battery cell includes a battery cell body and battery cell tabs disposed on the battery cell body; The adapter (3) includes a first connecting part and a second connecting part connected together. The first connecting part is spaced apart on the top of the cell body. The cell tab is bent and connected to the first connecting part. The second connecting part is configured to connect to the terminal post (103) of the battery. A high-temperature expansion layer (4) is disposed on the side of the first connection portion facing the battery cell body. The volume of the high-temperature expansion layer (4) increases when it reaches a preset temperature.

2. The battery according to claim 1, characterized in that, The high-temperature expansion layer (4) includes a protective film, an initiator, and a high-temperature polymerizable monomer, wherein the protective film covers the initiator and the high-temperature polymerizable monomer.

3. The battery according to claim 2, characterized in that, The protective film is made of PET, PE or PP material.

4. The battery according to claim 1, characterized in that, The battery electrode tab and the high-temperature expansion layer (4) are respectively located on the upper and lower sides of the first connection part.

5. The battery according to claim 1, characterized in that, A portion of the battery cell tab is connected to the upper surface of the first connection portion, and another portion of the battery cell tab is connected to the lower surface of the first connection portion. The high-temperature expansion layer (4) is disposed on the side of the battery cell tab facing the battery cell body.

6. The battery according to claim 1, characterized in that, The projection of the connection surface between the battery cell tab and the first connection part in the thickness direction of the adapter plate (3) at least partially overlaps with the projection of the high temperature expansion layer (4) in the thickness direction of the adapter plate (3).

7. The battery according to claim 6, characterized in that, The projection of the high-temperature expansion layer (4) on the thickness direction of the adapter piece (3) completely covers the projection of the connection surface between the battery cell tab and the first connection part on the thickness direction of the adapter piece (3). The area of ​​the high-temperature expansion layer (4) projected onto the thickness of the adapter piece (3) is S1, and the area of ​​the connection surface between the battery electrode tab and the first connection part projected onto the thickness of the adapter piece (3) is S2. The ratio of S1 to S2 is (3-12):

1.

8. The battery according to any one of claims 1-7, characterized in that, The battery cell includes at least a first battery cell assembly (1) and a second battery cell assembly (2). The first battery cell assembly (1) includes a first battery cell body (11) and a first battery cell tab (12). The second battery cell assembly (2) includes a second battery cell body (21) and a second battery cell tab (22). The first battery cell body (11) and the second battery cell body (21) are stacked. The first battery cell tab (12) and the second battery cell tab (22) are connected through the first connecting part.

9. The battery according to claim 8, characterized in that, The first battery cell tab (12) includes a first battery cell positive tab (121) and a first battery cell negative tab (122), the second battery cell tab (22) includes a second battery cell positive tab (221) and a second battery cell negative tab (222), the adapter (3) includes a positive electrode connecting piece (31) and a negative electrode connecting piece (32), the first battery cell positive tab (121) and the second battery cell positive tab (221) are connected through the positive electrode connecting piece (31), and the first battery cell negative tab (122) and the second battery cell negative tab (222) are connected through the negative electrode connecting piece (32).

10. The battery according to any one of claims 1-7, characterized in that, The battery also includes: A housing (101) for accommodating the battery cell, the housing (101) having an opening at its top; The cover plate (102) is fastened to the housing (101) and can close the opening. The cover plate (102) is provided with a pole post (103), which is connected to the second connecting part of the adapter piece (3).

Images