Battery cell, battery and electronic equipment

Abstract

The utility model discloses a battery cell, battery and electronic equipment, the battery cell comprises: a main body, which is formed by winding after a first pole piece and a second pole piece are laminated, the main body comprises a first surface and a second surface which are opposite to each other; the first true tab is connected to the first pole piece and protrudes relative to the first surface; the first conductive part comprises a plurality of first false tabs, the plurality of first false tabs are connected to the first pole piece, the plurality of first false tabs are stacked and welded along the thickness direction to define a middle surface, the middle surface divides the second surface into a first part and a second part along the length direction of the main body, and the first false tabs are connected to the first pole piece; the first conductive piece is connected to the first part in a bent mode, and the first conductive piece is attached to the second part. The battery cell disclosed by the utility model can have relatively high energy density.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery cell, a battery and an electronic device. Background Art

[0002] In the related art, after the pole pieces are wound to form a battery cell, the battery cell is charged and discharged with the outside world through the pole ears. Among them, in order to improve the charging efficiency of the battery cell, the existing battery cell is provided with multiple fake pole ears during the manufacturing process. Specifically, the battery cell is provided with a real pole ear and multiple fake pole ears. The real pole ear is mainly responsible for circuit conduction with the outside world, and multiple fake pole ears are welded together. In this way, when the external current enters the battery cell through the real pole ear, the current can pass through each layer of the pole piece through multiple fake pole ears, which can improve the charging efficiency. However, after providing multiple fake pole ears, the energy density of the battery will be lower. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery core that can have a higher energy density.

[0004] The utility model also provides a battery.

[0005] The utility model also provides an electronic device.

[0006] The battery cell according to the first embodiment of the utility model includes:

[0007] A main body, formed by stacking a first pole piece and a second pole piece and then winding them, the main body comprising a first surface and a second surface opposite to each other;

[0008] A first true pole tab, connected to the first pole piece and protruding relative to the first surface;

[0009] The first conductive member includes a plurality of first pseudo-pole ears, each of which is connected to the first pole piece. The plurality of first pseudo-pole ears are stacked and welded along the thickness direction to define an intermediate surface, and the intermediate surface divides the second surface into a first part and a second part along the length direction of the main body. The first conductive member is bent and connected to the first part, and the first conductive member is attached to the second part.

[0010] The battery cell according to the embodiment of the utility model has at least the following beneficial effects: the first conductive member includes a plurality of first false pole tabs, and after the plurality of first false pole tabs are stacked and welded, the current can enter various positions of the first pole piece through the first conductive member, which can improve the charging efficiency of the battery cell, wherein the first conductive member is bent and connected to the first part, and after the first conductive member is attached to the second part, the first conductive member will not occupy the space of the battery cell in the length direction, which can effectively improve the energy density of the battery cell. Specifically, the battery cell has a higher energy density.

[0011] According to the battery core of some embodiments of the present utility model, the battery core further includes a first adhesive layer, and the first adhesive layer is used to fix one end of the first conductive member on the main body.

[0012] According to some embodiments of the battery cell of the present invention, the battery cell also includes two third surfaces, two ends of the second surface are respectively connected to one end of the two third surfaces, two ends of the first surface are respectively connected to the other end of the two third surfaces, one end of the first adhesive layer is bonded to the first conductive component, and the other end of the first adhesive layer is bonded to the third surfaces.

[0013] According to some embodiments of the battery cell of the present invention, when the first pole piece and the second pole piece are stacked and flattened, the first pole piece includes a plurality of first main body parts and a plurality of second main body parts, and the first main body parts and the second main body parts are alternately arranged along the length direction of the first pole piece, and each of the first main body parts is connected to one of the first false pole ears, and the first false pole ears protrude from the second main body part.

[0014] According to some embodiments of the battery cell of the present invention, the first dummy tab and the first main body are an integrated structure. According to some embodiments of the battery cell of the present invention, along the thickness direction of the main body, the size of the main body is L1, and the size of the first conductive member is L2, L2<L1.

[0015] According to some embodiments of the utility model, the battery cell further includes a second true pole tab and a second conductive member, the second true pole tab is connected to the second pole piece and protrudes relative to the first surface; the second conductive member includes a plurality of second false pole tabs, the plurality of second false pole tabs are all connected to the second pole piece, the plurality of second false pole tabs are stacked and welded along the thickness direction, the second conductive member is bent and connected to the first part, and the second conductive member is attached to the second part.

[0016] According to the battery core of some embodiments of the present utility model, the battery core further includes a second adhesive layer, and the second adhesive layer is used to fix one end of the second conductive member on the main body.

[0017] The battery according to the second embodiment of the utility model comprises the battery cell described in any one of the first embodiment

[0018] The battery according to the embodiment of the utility model has at least the following beneficial effects: the first conductive member includes a plurality of first pseudo-electrode tabs, and after the plurality of first pseudo-electrode tabs are stacked and welded, the current can enter various positions of the first pole piece through the first conductive member, which can improve the charging efficiency of the battery cell, wherein the first conductive member is bent and connected to the first part, and after the first conductive member is attached to the second part, the first conductive member will not occupy the space of the battery cell in the length direction, which can effectively improve the energy density of the battery cell. Specifically, the battery cell has a higher energy density. Furthermore, the energy density of the battery is also higher.

[0019] An electronic device according to an embodiment of the third aspect of the utility model comprises the battery described in the embodiment of the second aspect.

[0020] The electronic device according to the embodiment of the utility model has at least the following beneficial effects: the first conductive member includes a plurality of first pseudo-pole ears. After the plurality of first pseudo-pole ears are stacked and welded, the current can enter various positions of the first pole piece through the first conductive member, which can improve the charging efficiency of the battery cell, wherein the first conductive member is bent and connected to the first part, and after the first conductive member is attached to the second part, the first conductive member will not occupy the space of the battery cell in the length direction, which can effectively improve the energy density of the battery cell. Specifically, the battery cell has a higher energy density. Furthermore, the energy density of the battery is also higher. Further, the electronic device having the battery has a better endurance.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 A schematic diagram of a battery cell according to a first embodiment of the present utility model;

[0024] Figure 2 A schematic diagram of a battery cell according to a second embodiment of the present utility model;

[0025] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0026] Figure 4 It is a partial schematic diagram of a battery cell according to a third embodiment of the utility model;

[0027] Figure 5It is a schematic diagram of a first pole piece in a battery cell of some embodiments of the utility model;

[0028] Figure 6 It is a schematic diagram of the second pole piece in the battery cell of the first embodiment of the utility model;

[0029] Figure 7 It is a schematic diagram of the second pole piece in the battery cell of the second embodiment of the utility model.

[0030] Reference numerals:

[0031] Battery cell 10, main body 100, first surface 110, second surface 120, first part 121, second part 122, third surface 130, first pole piece 200, first body part 210, second body part 220, second pole piece 300, first true pole piece 400, first conductive component 500, first fake pole piece 510, middle surface 600, first adhesive layer 700, second true pole piece 800, second conductive component 900, second fake pole piece 910, second adhesive layer 1000. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] In the related art, after the pole piece is wound to form the battery cell 10, the battery cell 10 is charged and discharged with the outside world through the pole ear. Among them, in order to improve the charging efficiency of the battery cell 10, the existing battery cell 10 is provided with multiple fake pole ears during the manufacturing process. Specifically, the battery cell 10 is provided with a real pole ear and multiple fake pole ears. The real pole ear is mainly responsible for circuit conduction with the outside world, and multiple fake pole ears are welded together. In this way, when the external current enters the battery cell 10 through the real pole ear, the current can pass through each layer of pole pieces through multiple fake pole ears, which can improve the charging efficiency. However, after setting up multiple fake pole ears, the energy density of the battery will be lower. Specifically, multiple fake pole ears protrude at one end of the battery cell 10, which will indirectly increase the length of the battery cell body, resulting in that although the battery cell 10 has a longer length, the volume utilization rate is not high, and therefore, the energy density of the battery is low. To this end, the present application proposes a battery cell 10.

[0038] Please refer to Figures 1 to 7In some embodiments, the battery cell 10 includes: a main body 100, a first true pole tab 400 and a first conductive member 500. The main body 100 is formed by stacking and winding the first pole piece 200 and the second pole piece 300, and the main body 100 includes a first surface 110 and a second surface 120 opposite to each other. Specifically, when the first pole piece 200 and the second pole piece 300 are stacked, a diaphragm is also provided between the two to achieve an insulating effect. The first pole piece 200 can be a positive pole piece or a negative pole piece. Similarly, the second pole piece 300 can be a positive pole piece or a negative pole piece. The first true pole tab 400 is connected to the first pole piece 200 and protrudes relative to the first surface 110. Among them, the battery cell 10 can be connected to the external current through the first true pole tab 400, that is, the battery cell 10 is charged and discharged through the first true pole tab 400. The first true pole tab 400 can be a positive pole tab, and the first true pole tab 400 can also be a negative pole tab. The first conductive member 500 includes a plurality of first fake pole ears 510. The plurality of first fake pole ears 510 are all connected to the first pole piece 200, and the plurality of first fake pole ears 510 are stacked and welded along their own thickness direction. It can be imagined that after the first pole piece 200 and the second pole piece 300 are stacked and wound to form the main body 100, along the thickness direction of the main body 100, the structure of the first pole piece 200 is similar to a thousand-layer roll structure. When charging, the current passes through the first real pole ear 400 and then enters each layer of the first pole piece 200. The design of welding the plurality of first fake pole ears 510 together can shorten the path of the current, thereby improving the charging efficiency. For further information, please refer to Figures 1 to 4 , defining a middle surface 600, the middle surface 600 divides the second surface 120 into a first portion 121 and a second portion 122 along the length direction of the main body 100, and the area of ​​the first portion 121 can be equal to the area of ​​the second portion 122. In addition, the first portion 121 and the second portion 122 can also be symmetrically arranged. The first conductive member 500 is bent and connected to the first portion 121, and the first conductive member 500 is attached to the second portion 122.

[0039] For details, please refer to Figure 3 The first conductive member 500 includes a plurality of first pseudo-electrode tabs 510. After the plurality of first pseudo-electrode tabs 510 are stacked and welded, the current can enter various positions of the first electrode sheet 200 through the first conductive member 500, which can improve the charging efficiency of the battery cell 10. After the first conductive member 500 is bent and connected to the first portion 121 and the first conductive member 500 is attached to the second portion 122, the first conductive member 500 will not occupy the space of the battery cell 10 in the length direction, which can effectively improve the energy density of the battery cell 10. Specifically, the battery cell 10 has a high energy density.

[0040] It should be noted that after the first true pole tab 400 protrudes from the first surface 110 and the first conductive member 500 protrudes from the second surface 120, when manufacturing the first pole piece 200, this can facilitate the processing and manufacturing by the staff. If the first true pole tab 400 and the first conductive member 500 are both located at the same end of the main body 100, this will cause processing difficulties. In some special cases, the first conductive member 500 and the first true pole tab 400 can also be arranged at the same end of the main body 100. Alternatively, two first conductive members 500 are arranged, one at one end of the main body 100 and the other at the other end of the main body 100. In addition, the positions of the first conductive member 500 and the first true pole tab 400 are not specifically limited. For example, the first conductive member 500 can be located in the middle of the main body 100 or at the edge of the main body 100. Similarly, the first true pole tab 400 may be located in the middle of the main body 100 or at an edge of the main body 100 . The first true pole tab 400 may also be located in the middle or at an edge of the first pole piece 200 .

[0041] As mentioned above, in order to prevent the first conductive member 500 from increasing the length of the main body 100, the first conductive member 500 can be bent and attached to the second portion 122. Further, in order to effectively prevent the first conductive member 500 from rebounding, a first adhesive layer 700 can be provided. Figure 3 In some embodiments, the battery cell 10 further includes a first adhesive layer 700, and the first adhesive layer 700 is used to fix one end of the first conductive member 500 on the main body 100. The first adhesive layer 700 can be used to fix the end of the first conductive member 500 that is not connected to the main body 100 on the main body 100, which can effectively prevent the first conductive member 500 from rebounding. The first adhesive layer 700 can be adhesive tape.

[0042] Further, the following specifically describes how the first adhesive layer 700 fixes the first conductive member 500. Figures 1 to 3 In some embodiments, the battery cell 10 further includes two third surfaces 130, the two ends of the second surface 120 are respectively connected to one end of the two third surfaces 130, and the two ends of the first surface 110 are respectively connected to the other end of the two third surfaces 130. The shape of the main body 100 is similar to a cuboid, or the shape of the main body 100 is a flat cylinder. The area of ​​the third surface 130 is greater than the area of ​​the first surface 110 and the second surface 120. One end of the first adhesive layer 700 is bonded to the first conductive member 500, and the other end of the first adhesive layer 700 is bonded to the third surface 130. The first adhesive layer 700 connected to the third surface 130 can have a good bonding effect, so that the first adhesive layer 700 can fix the first conductive member 500. In some other embodiments, one end of the first adhesive layer 700 can be bonded to the first conductive member 500, and the other end can be bonded to the second portion 122.

[0043] Further, the specific structure of the main body 100 is described below. Figures 1 to 5 In some embodiments, when the first pole piece 200 and the second pole piece 300 are stacked and flattened, that is, when the main body 100 is flattened, the first pole piece 200 includes a plurality of first body parts 210 and a plurality of second body parts 220. The first pole piece 200 can refer to 5, and the second pole piece 300 can refer to Figure 6 , along the length direction of the first pole piece 200, the first body part 210 and the second body part 220 are alternately arranged. The specific manner of alternating the first body part 210 and the second body part 220 is: along the length direction of the first pole piece 200, the first body part 210 and the second body part 220 are arranged in the following manner: the first body part 210, the second body part 220, the first body part 210, the second body part 220, the first body part 210, the second body part 220, the first body part 210 and the second body part 220; or, along the length direction of the first pole piece 200, the first body part 210 and the second body part 220 are arranged in the following manner: the second body part 220, the first body part 210, the second body part 220, the first body part 210 and the second body part 220. Each first body part 210 is connected to a first false pole lug 510, and the first false pole lug 510 protrudes from the second body part 220. Among them, after the first body part 210 and the second body part 220 are alternately arranged and the first dummy pole tab 510 is connected to the first body part 210, after the first pole piece 200 is wound into the main body 100, the first dummy pole tab 510 will be located in the first part 121, but not in the second part 122. The second part 122 is not provided with the first dummy pole tab 510, which can reserve space for the first conductive member 500, so that the first conductive member 500 can be bent conveniently.

[0044] Further, in some embodiments, please refer to Figure 5 , the first real pole tab 400 and the first fake pole tab 510 are connected to the same first body portion 210. In this way, when the battery cell 10 is charged, the current enters the first body portion 210 from the first real pole tab 400, and the first fake pole tab 510 is arranged on the first body portion 210, so the current can enter the first fake pole tab 510 (first conductive member 500) faster, thereby improving the charging efficiency of the battery cell 10.

[0045] Further, in some embodiments, the first false pole lug 510 and the first body part 210 are an integrated structure. Specifically, the manufacturing process of the first false pole lug 510 and the first body part 210 as an integrated structure can be that when the first pole piece 200 is manufactured, the first pole piece 200 is cut, so that a plurality of first false pole lugs 510 are cut out on the first pole piece 200, and a second body part 220 is spaced between two adjacent first false pole lugs 510. Afterwards, the first pole piece 200 is wound to form the main body 100, which has the characteristic of convenient manufacturing. In some other embodiments, the first false pole lug 510 can be welded to the first body part 210.

[0046] Further, in some embodiments, along the thickness direction of the main body 100, the size of the main body 100 is L1, and the size of the first conductive member 500 is L2, where L2<L1. The size of the first conductive member 500 refers to the length of the first conductive member 500 after it is bent. Specifically, along the thickness direction of the main body 100, the size of the first conductive member 500 is smaller than the size of the main body 100. Therefore, after the first conductive member 500 is bent, it can effectively prevent the first conductive member 500 from exceeding the main body 100 in the thickness direction of the main body 100, thereby preventing the energy density of the battery cell 10 from being low.

[0047] Furthermore, in order to improve the charging efficiency of the battery cell 10, a second conductive member 900 may be provided on the second electrode sheet 300. Figure 1 to Figure 2 In some embodiments, the battery cell 10 further includes a second true pole tab 800 and a second conductive member 900. The second true pole tab 800 is connected to the second pole piece 300 and protrudes relative to the first surface 110. The second pole piece 300 can be a positive pole piece or a negative pole piece. Similarly, the second pole piece 300 can be a positive pole piece or a negative pole piece. Among them, the battery cell 10 can be connected to the external current through the second true pole tab 800, that is, the battery cell 10 is charged and discharged through the second true pole tab 800. The second true pole tab 800 can be a positive pole tab, and the second true pole tab 800 can also be a negative pole tab. For example, the first true pole tab 400 can be a negative pole tab, and the second true pole tab 800 can be a positive pole tab. The second conductive member 900 includes a plurality of second false pole tabs 910, and the plurality of second false pole tabs 910 are all connected to the second pole piece 300, and the plurality of second false pole tabs 910 are stacked and welded along the thickness direction. The flattened state of the second pole piece 300 can refer to Figure 7, the second conductive member 900 is bent and connected to the first portion 121, and the second conductive member 900 is attached to the second portion 122. The second conductive member 900 includes a plurality of second pseudo pole tabs 910. After the plurality of second pseudo pole tabs 910 are stacked and welded, the current can enter various positions of the second pole piece 300 through the second conductive member 900, which can improve the charging efficiency of the battery cell 10. Specifically, with the cooperation of the first conductive member 500 and the second conductive member 900, the charging efficiency of the battery cell 10 is high.

[0048] Furthermore, in order to effectively prevent the second conductive member 900 from rebounding, a second adhesive layer 1000 may be provided. Figure 2 In some embodiments, the battery cell 10 further includes a second adhesive layer 1000, and the second adhesive layer 1000 is used to fix one end of the second conductive member 900 on the main body 100. The second adhesive layer 1000 can fix the end of the second conductive member 900 that is not connected to the main body 100 on the main body 100, which can effectively prevent the second conductive member 900 from rebounding. The second adhesive layer 1000 can be adhesive tape.

[0049] Further, the following specifically describes how the second adhesive layer 1000 fixes the second conductive member 900. Figure 2 In some embodiments, the battery cell 10 further includes two third surfaces 130, two ends of the second surface 120 are respectively connected to one end of the two third surfaces 130, and two ends of the first surface 110 are respectively connected to the other end of the two third surfaces 130. The shape of the main body 100 is similar to a rectangular parallelepiped, or the shape of the main body 100 is a flat cylinder. The area of ​​the third surface 130 is greater than the area of ​​the first surface 110 and the second surface 120. One end of the second adhesive layer 1000 is bonded to the second conductive member 900, and the other end of the second adhesive layer 1000 is bonded to the third surface 130. The second adhesive layer 1000 connected to the third surface 130 can have a better bonding effect, so that the second adhesive layer 1000 can fix the second conductive member 900.

[0050] In some embodiments, the battery includes the battery cell 10 of any one of the above embodiments. The first conductive member 500 includes a plurality of first pseudo-electrode tabs 510. After the plurality of first pseudo-electrode tabs 510 are stacked and welded, the current can enter various positions of the first pole piece 200 through the first conductive member 500, which can improve the charging efficiency of the battery cell 10. After the first conductive member 500 is bent and connected to the first part 121 and the first conductive member 500 is attached to the second part 122, the first conductive member 500 will not occupy the space of the battery cell 10 in the length direction, which can effectively improve the energy density of the battery cell 10. Specifically, the battery cell 10 has a higher energy density. Furthermore, the energy density of the battery is also higher.

[0051] In some embodiments, the electronic device includes the battery in the above embodiment. The first conductive member 500 includes a plurality of first pseudo-pole ears 510. After the plurality of first pseudo-pole ears 510 are stacked and welded, the current can enter various positions of the first pole piece 200 through the first conductive member 500, which can improve the charging efficiency of the battery cell 10. After the first conductive member 500 is bent and connected to the first part 121 and the first conductive member 500 is attached to the second part 122, the first conductive member 500 will not occupy the space of the battery cell 10 in the length direction, which can effectively improve the energy density of the battery cell 10. Specifically, the battery cell 10 has a higher energy density. Furthermore, the energy density of the battery is also higher.

[0052] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A battery cell, characterized in that: include: A main body, formed by stacking a first pole piece and a second pole piece and then winding them, the main body comprising a first surface and a second surface opposite to each other; A first true pole tab, connected to the first pole piece and protruding relative to the first surface; The first conductive member includes a plurality of first pseudo-pole ears, each of which is connected to the first pole piece. The plurality of first pseudo-pole ears are stacked and welded along the thickness direction to define an intermediate surface, and the intermediate surface divides the second surface into a first part and a second part along the length direction of the main body. The first conductive member is bent and connected to the first part, and the first conductive member is attached to the second part.

2. The battery cell according to claim 1, characterized in that: The battery core further includes a first adhesive layer, and the first adhesive layer is used to fix one end of the first conductive member on the main body.

3. The battery cell according to claim 2, characterized in that: The battery cell also includes two third surfaces, two ends of the second surface are respectively connected to one end of the two third surfaces, two ends of the first surface are respectively connected to the other end of the two third surfaces, one end of the first adhesive layer is bonded to the first conductive component, and the other end of the first adhesive layer is bonded to the third surfaces.

4. The battery cell according to claim 1, characterized in that: When the first pole piece and the second pole piece are stacked and flattened, the first pole piece includes a plurality of first main body parts and a plurality of second main body parts, and the first main body parts and the second main body parts are alternately arranged along the length direction of the first pole piece, and each of the first main body parts is connected to a first false pole ear, and the first false pole ear protrudes from the second main body part.

5. The battery cell according to claim 4, characterized in that: The first dummy electrode tab and the first main body are an integrated structure.

6. The battery cell according to claim 1, characterized in that: Along the thickness direction of the main body, the size of the main body is L1, the size of the first conductive member is L2, and L2<L1.

7. The battery cell according to claim 1, characterized in that: The battery cell also includes a second true pole tab and a second conductive member, the second true pole tab is connected to the second pole piece and protrudes relative to the first surface; the second conductive member includes a plurality of second false pole tabs, the plurality of second false pole tabs are all connected to the second pole piece, the plurality of second false pole tabs are stacked and welded along the thickness direction, the second conductive member is bent and connected to the first part, and the second conductive member is attached to the second part.

8. The battery cell according to claim 7, characterized in that: The battery core further includes a second adhesive layer, and the second adhesive layer is used to fix one end of the second conductive member on the main body.

9. A battery, characterized in that The invention comprises the battery cell as claimed in any one of claims 1 to 8.

10. An electronic device, characterized in that A battery comprising the battery of claim 9.

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