Battery cell and battery

Abstract

The utility model discloses a battery cell and a battery. The battery cell provided by the utility model comprises a first pole piece, a second pole piece and a diaphragm, the first pole piece comprises a first current collector and a first active material layer; the first current collector comprises a plurality of first laminated sections and a plurality of first corner sections; the first active material layer comprises a plurality of first stacking sections, a plurality of second pole pieces are arranged, the second pole pieces and the first stacking sections are mutually stacked, one first stacking section is arranged between any two adjacent second pole pieces, one second pole piece is arranged between any two adjacent first stacking sections, and at least part of the surface of one side, facing the second pole pieces, of the first corner section is exposed out of the first active material layer. And the diaphragm is arranged between the first pole piece and the second pole piece. According to the battery cell disclosed by the embodiment of the utility model, the active material layer on the surface of one side, facing the second pole piece, of the corner of the first pole piece is removed, so that the powder falling phenomenon that the active material layer falls off is not easy to generate at the corner.

Description

Technical Field

[0001] This utility model relates to the field of battery processing, specifically to a battery cell and a battery. Background Technology

[0002] A battery cell typically consists of a positive electrode, a negative electrode, and a separator. Mainstream battery cell manufacturing processes include stacked cells. Stacked cells require trimming the edges of each electrode, resulting in excessive burrs, which can easily cause short circuits between the positive and negative electrodes. Therefore, existing technologies use a novel stacking method where the positive electrode is designed as a bent, folded shape, and the negative electrode is designed as a flat shape. The negative electrode is then interspersed within the gaps formed by the bent positive electrode, thus reducing the cutting process for the positive electrode and the number of burrs. However, the battery cell with this design is prone to powder shedding at the corners. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery cell that can reduce powder shedding at the corners of the electrode sheets.

[0004] This utility model also proposes a battery having the above-mentioned battery cell.

[0005] A battery cell according to a first aspect of the present invention includes a first electrode, a second electrode, and a separator. The first electrode includes a first current collector and a first active material layer. The first current collector is folded and includes multiple first stacked segments and multiple first corner segments. The two ends of each first corner segment are connected to two adjacent first stacked segments. The first active material layer is connected to the surface of each first stacked segment. Multiple second electrodes are provided, stacked with the first stacked segments. A first stacked segment is provided between any two adjacent second electrodes, and a second electrode is provided between any two adjacent first stacked segments. At least part of the surface of each first corner segment facing the second electrode is exposed outside the first active material layer. The separator is disposed between the first electrode and the second electrode.

[0006] The battery cell according to the first aspect of this utility model has at least the following beneficial effects: In the prior art battery cell structure, because the corners of the electrode sheets with the serpentine bending design are not specially treated for the active material layer, the inner side of the corner of the first electrode sheet has an active material layer, which is easily detached and causes powder shedding when squeezed. The battery cell of this utility model removes the active material layer from the surface of the first electrode sheet facing the second electrode sheet at the corner, thereby making it less prone to powder shedding at the corner.

[0007] According to some embodiments of the present invention, the surface of the first corner segment facing away from the second electrode is exposed outside the first active material layer.

[0008] According to some embodiments of the present invention, the battery cell further includes an insulating layer, and the insulating layer is disposed on the surface of the first corner segment facing away from the second electrode.

[0009] According to some embodiments of the present invention, the maximum thickness of the first electrode is D1, the maximum thickness of the second electrode is D2, the thickness of the diaphragm is D3, the length of the first corner segment is L1, and (2D1 + D2 + 2D3) ≥ L1 ≥ (D1 + D2 + 2D3).

[0010] According to some embodiments of the present invention, the second electrode includes a second current collector and a second active material layer. The second current collector includes a plurality of second stacked segments and at least one second corner segment. The two ends of the second corner segment are respectively connected to two adjacent second stacked segments. The second active material layer is connected to the surface of the second stacked segments. A first stacked segment is provided between any two adjacent second stacked segments, and a second stacked segment is provided between any two adjacent first stacked segments. The side surface of the second corner segment facing the first electrode is at least partially exposed outside the second active material layer.

[0011] According to some embodiments of the present invention, the first electrode is an anode plate, the second electrode is a cathode plate, the length of one first stacked segment is L2, the length of one second stacked segment is L3, and 0.2mm < (L2 - L3) < 2.4mm.

[0012] According to some embodiments of the present invention, the battery cell includes a plurality of second tabs, each of the plurality of second tabs being connected to a second electrode plate, and the ends of the plurality of second tabs away from the second electrode plate being connected to each other.

[0013] According to some embodiments of the present invention, the diaphragm is serpentine and has two layers, which are respectively disposed on both sides of the first electrode.

[0014] According to some embodiments of the present invention, the diaphragm has multiple layers, and each of the first laminated segments and the second electrode is provided with a diaphragm.

[0015] The battery according to a second aspect of the present invention includes a battery cell as described in any one of the first aspect embodiments, and further includes a housing, wherein the battery cell is encapsulated within the housing.

[0016] The battery according to the embodiments of this utility model has at least the following beneficial effects: In the prior art, the active material layer at the corners of the electrode plates with serpentine bending design is not specially treated. Therefore, the active material layer on the inner side of the corner of the first electrode plate is prone to falling off and causing powder shedding when squeezed. The battery cell of the present utility model removes the active material layer on the surface of the first electrode plate facing the second electrode plate at the corner, thereby making it less likely for the active material layer to fall off and cause powder shedding at the corner. The battery using this cell can also reduce internal powder shedding and improve battery quality.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a schematic diagram of a battery cell in one embodiment of the present invention;

[0020] Figure 2 This is a top view of the first electrode of the battery cell before folding in one embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the battery cell in the second embodiment of the present invention.

[0022] Reference numerals: Cell 100, First electrode 101, First current collector 102, First active material layer 103, First stacked segment 104, First corner segment 105, Second electrode 106, Separator 107, Insulating layer 108, Second current collector 109, Second active material layer 110, Second stacked segment 301, Second corner segment 302, First tab 303, Second tab 304. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] refer to Figure 1 and Figure 2According to a first aspect embodiment of the present invention, a battery cell 100 includes a first electrode 101, a second electrode 106, and a separator 107. The first electrode 101 includes a first current collector 102 and a first active material layer 103. The first current collector 102 is folded and includes multiple first stacked segments 104 and multiple first corner segments 105. The two ends of each first corner segment 105 are connected to two adjacent first stacked segments 104. The first active material layer 103 is connected to the surface of the first stacked segments 104. Multiple second electrode segments 106 are provided, and the second electrode segments 106 are stacked with the first stacked segments 104. A first stacked segment 104 is provided between any two adjacent second electrode segments 106, and a second electrode 106 is provided between any two adjacent first stacked segments 104. At least part of the surface of the first corner segment 105 facing the second electrode 106 is exposed outside the first active material layer 103. The diaphragm 107 is disposed between the first electrode 101 and the second electrode 106.

[0029] In the prior art, the active material layer at the corners of the serpentine electrode 100 structure is not specially treated due to the serpentine bending design. Therefore, the active material layer on the inner side of the corner of the first electrode 101 is prone to detachment and powder shedding when compressed. The battery cell 100 of this embodiment removes the active material layer from the surface of the first electrode 101 facing the second electrode 106 at the corner, thus preventing powder shedding at the corner.

[0030] It should be noted that in some embodiments of this utility model, the surface of the first corner segment 105 is at least partially exposed outside the first active material layer 103, which means that the current collector at that location is at least partially free of the first active material layer 103, but does not mean that the surface is completely exposed. Furthermore, in terms of process technology, it is preferable to completely remove the first active material layer 103 at that location. In some embodiments, an insulating layer 108 or a diaphragm 107 is also provided at the corner, which does not conflict with the fact that the surface is exposed outside the first active material layer 103.

[0031] refer to Figure 1 In some embodiments of this utility model, the side surface of the first corner segment 105 facing away from the second electrode 106 is exposed outside the first active material layer 103. Figure 1 The diagram shows a partial structure of the battery cell 100, illustrating only the three first corner segments 105. The surface of the first corner segment 105 facing away from the second electrode 106 does not have a corresponding second electrode 106, nor does it have a corresponding second active material layer 110. Therefore, not setting the first active material layer 103 at this location can effectively reduce the overall width of the battery cell 100 and improve space utilization, while also reducing unnecessary waste and lowering manufacturing costs.

[0032] It should be noted that, in some embodiments of this utility model, the method of exposing the surface at the corner outside the first active material layer 103 can be done during the coating and manufacturing of the first electrode 101, as shown in the example below. Figure 2 As shown, a first active material layer 103 is intermittently coated on the first current collector 102 to form a first corner segment 105 and a first stacked segment 104. Alternatively, the surface of the first current collector 102 can be coated entirely first, and then the first active material layer 103 of the first corner segment 105 can be removed by means of laser cleaning or other methods. Both methods have their advantages. Intermittent coating can improve the uniformity of the coating of the first active material layer 103, and the required coating amount can be accurately calculated for precise coating, reducing the material cost of processing and reducing the ineffective operating time of the equipment, thus extending the service life of the processing equipment. The method of coating and then removing has better flexibility and controllability. After coating, the coating of the first active material layer 103 can be observed, and then unwanted coating parts such as the first corner segment 105 can be precisely removed to obtain the desired shape. The two methods can be selected according to the actual production needs.

[0033] refer to Figure 1 In some embodiments of this utility model, the battery cell 100 further includes an insulating layer 108, and the insulating layer 108 is provided on the surface of the first corner segment 105 facing away from the second electrode 106. Aluminum casings are commonly used in battery manufacturing to enclose the battery cell 100. However, aluminum is a relatively reactive metal and easily reacts with other materials in the battery environment. Especially at high potentials, aluminum readily undergoes lithium intercalation, generating unstable compounds. Direct contact between the current collector inside the first electrode 101 and the aluminum casing may cause a chemical reaction and corrode the casing. Therefore, providing an insulating layer 108 on the surface of the first corner segment 105 facing away from the second electrode 106 can effectively prevent corrosion caused by direct contact between the first electrode 101 and the casing.

[0034] It should be noted that the reference Figure 1 In some embodiments of this utility model, the surface of the first corner segment 105 facing the second electrode 106 is also provided with an insulating layer 108. This design can prevent the first current collector 102 from directly contacting the second current collector 109 and causing a short circuit, thereby improving safety performance.

[0035] It should be noted that the reference Figure 3In some embodiments of this utility model, when the second electrode 106 also adopts a folded design and has a second corner segment 302, an insulating layer 108 can also be provided on the second corner segment 302. Furthermore, the insulating layer 108 is preferably provided on the side surface of the second corner segment 302 facing the first electrode 101. This design is also to prevent short circuits and improve safety performance.

[0036] It should be noted that, in some embodiments of this utility model, the insulating layer 108 may specifically be made of materials such as polypropylene, polyethylene, or a composite of polypropylene and polyethylene.

[0037] refer to Figure 1 and Figure 2 In some embodiments of this utility model, the maximum thickness of the first electrode 101 is D1, the maximum thickness of the second electrode 106 is D2, the thickness of the diaphragm 107 is D3, and the length of the first corner segment 105 is L1, where (2D1 + D2 + 2D3) ≥ L1 ≥ (D1 + D2 + 2D3). This design ensures that after bending and folding the first electrode 101, the length of the first corner segment 105 is moderate, effectively connecting two adjacent first stacked segments 104 without affecting the arrangement of the diaphragm 107 and the second electrode 106. When the length L1 of the first corner segment 105 is less than (D1 + D2 + 2D3), the size is too small. After folding the first electrode 101, the space between the two first stacked segments 104 is insufficient to accommodate the thickness of the two separators 107, the second electrode 106, and the first active material layer 103. This may cause compression and deformation, which is not conducive to the forming of the cell 100. When the length L1 of the first corner segment 105 is greater than (2D1 + D2 + 2D3), the size is too large. After folding the first electrode 101, a part of the first corner segment 105 will protrude outward, increasing the unnecessary size of the cell 100 and reducing the space utilization rate.

[0038] It should be noted that the maximum thickness of the first electrode 101 and the second electrode 106 mentioned above refers to the overall thickness after both sides of the current collector are coated with active material layers.

[0039] refer to Figure 3In some embodiments of this utility model, the second electrode 106 includes a second current collector 109 and a second active material layer 110. The second current collector 109 includes a plurality of second stacked segments 301 and at least one second corner segment 302. The two ends of the second corner segment 302 are respectively connected to two adjacent second stacked segments 301. The second active material layer 110 is connected to the surface of the second stacked segments 301. A first stacked segment 104 is provided between any two adjacent second stacked segments 301, and a second stacked segment 301 is provided between any two adjacent first stacked segments 104. The surface of the second corner segment 302 facing the first electrode 101 is at least partially exposed outside the second active material layer 110. This design also makes the second electrode 106 bent, reducing the cutting of the second electrode 106, thereby reducing the overall cutting process and the number of burrs.

[0040] It should be noted that the reference Figure 3 In some embodiments of this utility model, a single first electrode 101 or a single second electrode 106 may have only one first corner segment 105 or only one second corner segment 302. However, the actual structure of the battery cell 100 is composed of multiple first electrode 101s and second electrode 106s. Therefore, compared with... Figure 1 The structure shown and the description of the first pole piece 101 having multiple first corner segments are not contradictory. Figure 3 The structure shown represents a further optimization.

[0041] refer to Figure 3 In some embodiments of this utility model, the first electrode 101 is an anode plate, the second electrode 106 is a cathode plate, the length of a first stacked segment 104 is L2, and the length of a second stacked segment 301 is L3, where 0.2mm < (L2 - L3) < 2.4mm. It should be noted that the lengths of the first stacked segment 104 and the second stacked segment 301 mentioned above essentially refer to... Figure 3 In the indicated direction, the lengths of the first active material layer 103 and the second active material layer 110 vary. When the first electrode 101 is the anode and the second electrode 106 is the cathode, to ensure the safety performance and sufficient energy density of the battery, the content of the first active material layer 103 needs to be greater than the content of the second active material layer. Controlling the length difference within the above range is to balance the dual requirements of energy density and safety performance. When (L2-L3) ≤ 0.2 mm, the redundancy of the first active material layer 103 is too small, which may lead to excessive lithium plating, overheating, and puncture hazards. When (L2-L3) ≥ 2.4 mm, the redundancy of the first active material layer 103 is too large, which reduces the overall energy density of the cell 100 and increases the size of the cell 100.

[0042] It should be noted that the above (L2-L3) is essentially to control the one-sided difference between the first layer stack 104 and the second layer stack 301. Because symmetrical stacking is preferred in the manufacturing process, the actual value range that needs to be met is that the one-sided difference (L2-L3) / 2 is between 0.1mm and 1.2mm.

[0043] It should be noted that the reference Figure 3 When the first stacked segment 104 is longer than the second stacked segment 301, the length of the second corner segment 302 also increases or decreases according to the increase or decrease of (L2-L3). The specific value is to consider the changes caused by the fluctuation of the length difference (L2-L3) when the length L1 of the first corner segment 105 is increased.

[0044] refer to Figure 1 In some embodiments of this invention, the second electrode 106 includes a second current collector 109 and a second active material layer 110. The second active material layer 110 is connected to the surface of the second current collector 109 and is disposed between the second current collector 109 and the first laminated segment 104. The second active material layer 110 is responsible for storing and releasing energy. The second electrode 106 ensures efficient energy transmission to the external circuit, improving the conductivity of the battery cell 100. The second active material layer 110 is coated on the surface of the second current collector 109. When the second active material layer 110 undergoes a chemical reaction, the generated current is collected through the second current collector 109 and output to the external circuit.

[0045] It should be noted that the reference Figure 1 In some embodiments of this utility model, the two second electrode plates 106 at both ends along the thickness direction do not have a second active material layer 110 on the side surface of the second current collector 109 facing away from the first electrode plate 101. Not having a second active material layer 110 on the side surface that does not participate in the reaction can improve energy density and energy utilization, and can reduce the size of the cell 100.

[0046] In some embodiments of this invention, the first electrode 101 is a positive electrode, and the second electrode 106 is a negative electrode. Lithium plating refers to the phenomenon in lithium-ion batteries where lithium ions cannot be properly inserted into the negative electrode during charging, and instead deposit on the surface of the negative electrode to form metallic lithium. When the first electrode 101 is a positive electrode and the second electrode 106 is a negative electrode, the existing folded nested structure does not remove the active material layer from the first corner segment 105. Therefore, the portion of the first corner segment 105 near the second electrode 106 has an excessive amount of the first active material layer 103, without a corresponding second electrode 106 and its corresponding active material layer. In this case, the lithium ions released from the positive electrode exceed the capacity of the negative electrode, thus easily leading to lithium plating. The cell 100 of this invention balances the ratio of the active material layers on the first electrode 101 and the second electrode 106, thereby reducing the occurrence of lithium plating.

[0047] In some embodiments of this invention, the battery cell 100 includes a plurality of second tabs, each of which is connected to a second electrode 106. The ends of the plurality of second tabs furthest from the second electrode 106 are interconnected. As a crucial channel for current output, the quality of the tabs directly affects the battery's conductivity. Individual tab designs ensure that each electrode can effectively transmit current, while connecting multiple second tabs together further enhances the current transmission capability, thereby improving the overall conductivity of the battery. In some embodiments of this invention, the multiple second tabs can be connected by welding or bonding, etc., to form a single tab for the second electrode 106.

[0048] It should be noted that in some embodiments of this utility model, the battery cell 100 further includes a first electrode tab, which is connected to the first electrode plate 101. Since the first current collector 102 in the battery cell 100 of this utility model embodiment is a whole, connecting all the first active material layers 103 together, only one conventional first electrode tab is needed, and there is no need to reserve electrode tabs for each layer. This reduces the transfer welding process of the first electrode plate 101, that is, the process of welding multiple electrode tabs together, thus optimizing the processing process and improving production efficiency.

[0049] In some embodiments of this utility model, the separator 107 is serpentine and has two layers, which are respectively disposed on both sides of the first electrode 101. With this design, only after the first active material layer 103 is coated on the first current collector 102 during the processing of the first electrode 101, the two layers of separator 107 can be attached to both sides of the first electrode 101 to form a composite electrode, and then it can be stacked with the second electrode 106 to form the battery cell 100. This design can ensure that the separator 107 completely isolates the first electrode 101 and the second electrode 106, while also simplifying the processing steps and improving manufacturing efficiency.

[0050] like Figure 1 As shown, in some embodiments of this utility model, there are multiple diaphragms 107, with a diaphragm 107 disposed between each first stacked segment 104 and the second electrode 106. This design allows the first electrode 101 and the second electrode 106 to be manufactured separately, and then stacked alternately in the order of the first stacked segment 104, diaphragm 107, and second electrode 106 during the lamination process. This reduces the area of ​​the diaphragm 107 and lowers processing costs.

[0051] The battery according to a second aspect embodiment of the present invention includes a cell 100 as described in any of the first aspect embodiments, and a housing, wherein the cell 100 is encapsulated within the housing. In the prior art, the cell 100 structure lacks special treatment for the active material layer at the corners of the serpentine-bending electrode plates. Therefore, the active material layer on the inner side of the corner of the first electrode plate 101 is prone to detachment and powder shedding when compressed. The cell 100 of the present invention removes the active material layer from the surface of the first electrode plate 101 facing the second electrode plate 106 at the corner, thus reducing the likelihood of powder shedding at the corner. Batteries using this cell 100 also reduce internal powder shedding and improve battery quality.

[0052] It should be noted that in some embodiments of this utility model, when the housing is made of aluminum-plastic film or aluminum shell, an insulating layer 108 is provided on the surface of the first corner segment 105 of the first electrode 101 facing away from the second electrode 106, so as to avoid the first current collector 102 directly contacting the housing and causing corrosion and other phenomena. When the housing is made of steel shell, since steel shell has good chemical stability, the insulating layer 108 can be omitted to obtain a smaller cell 100 size.

[0053] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. An electric cell, characterized by, Comprising: a first pole piece, the first pole piece comprising a first current collector and a first active material layer, the first current collector being folded on itself, the first current collector comprising a plurality of first layering segments and a plurality of first corner segments, two ends of the first corner segment being connected with two adjacent first layering segments respectively, the first active material layer being connected to a surface of the first layering segment; a plurality of second pole pieces, the second pole pieces being stacked with the first layering segments, one first layering segment being arranged between any two adjacent second pole pieces, one second pole piece being arranged between any two adjacent first layering segments, a side surface of the first corner segment facing the second pole piece being at least partially exposed outside the first active material layer; a separator, the separator being arranged between the first pole piece and the second pole piece.

2. The electric cell of claim 1, wherein, A side surface of the first corner segment away from the second pole piece is exposed outside the first active material layer.

3. The electric cell of claim 1, wherein, The first pole piece further comprises an insulating layer, the side surface of the first corner segment away from the second pole piece is provided with the insulating layer.

4. The electric cell of claim 1, wherein, A maximum thickness of the first pole piece is D1, a maximum thickness of the second pole piece is D2, a thickness of the separator is D3, a length of the first corner segment is L1, (2D1+D2+2D3)≥L1≥(D1+D2+2D3).

5. The electric cell of claim 1, wherein, The second pole piece comprises a second current collector and a second active material layer, the second current collector comprising a plurality of second layering segments and at least one second corner segment, two ends of the second corner segment being connected with two adjacent second layering segments respectively, the second active material layer being connected to a surface of the second layering segment; one first layering segment being arranged between any two adjacent second layering segments, one second layering segment being arranged between any two adjacent first layering segments, a side surface of the second corner segment facing the first pole piece being at least partially exposed outside the second active material layer.

6. The electric cell of claim 5, wherein, The first pole piece is an anode pole piece, the second pole piece is a cathode pole piece, a length of one first layering segment is L2, a length of one second layering segment is L3, 0.2mm<(L2-L3)<2.4mm.

7. The electric cell of claim 1, wherein, The battery cell comprises a plurality of second tabs, the plurality of second tabs being connected with the plurality of second pole pieces respectively, the plurality of second tabs being connected with each other away from the plurality of second pole pieces.

8. The electric cell of claim 1, wherein, The separator is serpentine, the separator comprises two layers, the two layers of the separator being arranged on two sides of the first pole piece.

9. The electric cell of claim 1, wherein, The separator comprises a plurality of separators, one separator being arranged between each first layering segment and the second pole piece.

10. A battery characterized by Comprising: The battery cell according to any one of claims 1-9; a housing, the battery cell being packaged in the housing.

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