Cell protection component and cell

Abstract

The present invention relates to the technical field of batteries, and particularly to a cell protection component and a cell. The cell protection component includes: a pressure relief member embedded in an exhaust hole; a protection member attached to the side of the cell cover facing the outside of the cell and covering the exhaust hole; the protection member includes a protection portion and a pasting portion arranged in a stacked manner, the protection portion completely covers the exhaust hole, the pasting portion is clamped between the cell cover and the protection portion, and a diversion groove communicating the exhaust hole and the outside of the cell is formed in the pasting portion. The width dimension of the diversion groove before the protection member is pasted is W, and W≥0.1 mm. In the present invention, a diversion groove communicating the exhaust hole and the outside of the cell is formed in the pasting portion, so as to ensure the integrity of the protection portion, meet the protection and exhaust requirements of the pressure relief member, effectively reduce the risk of the pressure relief member being contaminated, and thus improve the reliability of the safety protection of the cell. W≥0.1 mm enables the exhaust hole to remain communicated with the outside of the cell after the protection member is pasted to ensure a reliable conduction function of the diversion groove.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a cell protection component and a cell. Background Art

[0002] The structure of a lithium-ion battery consists of a cover plate, a housing, an electrode assembly, an electrolyte, an internal and external insulation structure, etc. To ensure the safety of the battery, an explosion-proof valve is installed on the battery cover plate. When the battery has an accident due to improper charging, short circuit, or exposure to harsh environments such as high temperature, a high-energy battery will generate a large amount of gas and the temperature will rise sharply. The gas will blow open the explosion-proof valve to achieve the purpose of pressure relief, thus greatly improving the safety performance of the battery. To prevent sharp objects from damaging the explosion-proof valve or foreign objects, dust, etc. from falling into the explosion-proof valve and affecting the safety of the battery, a protection patch is provided on the explosion-proof valve. There are openings on the protection patch on the cover plate to play the role of exhaust and conduction. However, electrolyte impurities are likely to enter the explosion-proof valve, causing damage to the explosion-proof valve, affecting the bursting strength of the explosion-proof valve, and resulting in the failure of the cell safety protection. Summary of the Invention

[0003] In view of this, the purpose of the present application is to provide a cell protection component and a cell to solve the problem that openings are provided on the protection patch of the existing explosion-proof valve, and electrolyte impurities are likely to enter the explosion-proof valve, causing damage to the explosion-proof valve, affecting the bursting strength of the explosion-proof valve, and resulting in the failure of the cell safety protection.

[0004] The first aspect of the present invention provides a cell protection component, which is arranged on a cell cover plate. An exhaust hole is opened on the cell cover plate. Wherein, the cell protection component includes:

[0005] A pressure relief member, embedded in the exhaust hole;

[0006] A protection member, pasted on the side of the cell cover plate facing the outside of the cell and covering the exhaust hole; the protection member includes a protection part and a pasting part arranged in a stacked manner. The protection part completely covers the exhaust hole. The pasting part is clamped between the cell cover plate and the protection part. A diversion groove communicating the exhaust hole and the outside of the cell is opened on the pasting part. The width dimension of the diversion groove before the protection member is pasted is W, and W≥0.1 mm;

[0007] The total area of the diversion groove is X, in mm 2 ; the area of the protection member is Y, in mm 2 ; the area of the exhaust hole is Z, in mm 2 ; M = X / Z, 0.005≤M≤0.14; N = X / (Y - Z), 14.5%≤N≤33%.

[0008] Preferably, the pasting part is formed into an annular structure with an opening, and the diversion groove is arranged at the opening of the annular structure.

[0009] Preferably, a plurality of the diversion grooves are provided, and the plurality of diversion grooves are arranged at intervals on the pasting part.

[0010] Preferably, at least two of the diversion grooves are arranged opposite to each other on the pasting part.

[0011] Preferably, the thickness dimension of the protection part is H1, and 0.05 mm ≤ H1 ≤ 10 mm.

[0012] Preferably, the thickness dimension of the pasting part is H2, and 0.01 mm ≤ H2 ≤ 5 mm.

[0013] Preferably, the pasting part is arranged at the edge of the protection part, and the shape of the protection part is the same as the shape of the exhaust hole.

[0014] Preferably, a convex platform is formed on the inner wall of the exhaust hole. The convex platform is arranged at one end of the exhaust hole facing the outside of the battery cell. The pressure relief part abuts against one end of the convex platform facing the inside of the battery cell, and the protection part is attached to one end of the convex platform facing the outside of the battery cell.

[0015] Preferably, a recessed scoring part is arranged on the pressure relief part. The pressure inside the battery cell can break through the pressure relief part, so that the pressure relief part cracks along the shape of the scoring part.

[0016] In the second aspect of the present invention, a battery cell is provided, including the battery cell protection component described in any one of the above technical solutions.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The battery cell protection component of the present invention includes a pressure relief part and a protection part. The pressure relief part is embedded in the exhaust hole; the protection part is attached to the side of the battery cell cover facing the outside of the battery cell and covers the exhaust hole; the protection part includes a protection part and a pasting part which are stacked. The protection part completely covers the exhaust hole, and the pasting part is clamped between the battery cell cover and the protection part. A diversion groove communicating the exhaust hole and the outside of the battery cell is arranged on the pasting part, so as to ensure the integrity of the protection part, meet the protection and exhaust requirements of the pressure relief part, effectively reduce the risk of the pressure relief part being contaminated, and thus improve the reliability of the safety protection of the battery cell. In addition, the width dimension of the diversion groove before the protection part is pasted is W, W ≥ 0.1 mm, the total area of the diversion grooves is X, and the unit is mm 2 ; the area of the protection part is Y, and the unit is mm 2 ; the area of the exhaust hole is Z, and the unit is mm 2; M = X / Z, 0.005 ≤ M ≤ 0.14; N = X / (Y - Z), 14.5% ≤ N ≤ 33%, so that after the protective part is pasted, it is ensured that the exhaust hole can be kept in communication with the outside of the battery cell, making the diversion groove have a reliable conduction effect.

[0019] To make the above objects, features and advantages of the present application more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 The first structural schematic diagram of the battery cell protection assembly provided by the embodiment of the present invention;

[0022] Figure 2 For Figure 1 The sectional view taken along the A-A section in

[0023] Figure 3 The schematic diagram of the first structure of the battery cell protection assembly provided by the embodiment of the present invention from another perspective;

[0024] Figure 4 The schematic diagram of the first structure of the battery cell protection assembly provided by the embodiment of the present invention from yet another perspective;

[0025] Figure 5 For Figure 4 The enlarged structural schematic diagram at position B in

[0026] Figure 6 The second structural schematic diagram of the battery cell protection assembly provided by the embodiment of the present invention;

[0027] Figure 7 The schematic diagram of the second structure of the battery cell protection assembly provided by the embodiment of the present invention from another perspective;

[0028] Figure 8 The schematic diagram of the battery cell protection assembly provided by the embodiment of the present invention installed on the battery cell cover plate;

[0029] Figure 9 For Figure 8 The sectional view taken along the C-C section in

[0030] Figure 10 For Figure 9Schematic diagram of the enlarged structure at D in the [Chinese context].

[0031] Icons: 10 - pressure relief component; 11 - thinning groove; 111 - scoring part; 20 - protective component; 21 - protection part; 22 - pasting part; 221 - diversion groove; 30 - battery cell cover plate; 40 - exhaust hole; 41 - boss. Detailed implementation manners

[0032] The following detailed implementation manners are provided to assist the reader in obtaining a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of the operations described herein is merely exemplary and is not limited to the order set forth herein. Rather, changes that will be apparent after understanding the disclosure of this application may be made, except for operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

[0033] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, devices, and / or systems described herein that will be apparent after understanding the disclosure of this application.

[0034] Throughout the specification, when an element (such as a layer, region, or substrate) is described as "on" another element, "connected to" another element, "bonded to" another element, "above" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "above" another element, or "covering" another element, or there may be one or more other elements between them. In contrast, when an element is described as "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly above" another element, or "directly covering" another element, there may be no other elements between them.

[0035] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0036] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or sections, these components, elements, regions, layers, or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or section from another. Thus, a first component, element, region, layer, or section as referred to in the examples described herein may also be termed a second component, element, region, layer, or section without departing from the teachings of the examples.

[0037] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another as shown in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientation of "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or at other orientations), and the spatial relationship terms used herein will be interpreted accordingly.

[0038] The terms used herein are for the purpose of describing various examples only and are not intended to limit the disclosure. Unless the context clearly dictates otherwise, the singular forms are also intended to include the plural forms. The terms "comprises", "comprising", and "having" list the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0039] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the figures may occur. Thus, the examples described herein are not limited to the specific shapes shown in the figures but include changes in shape that occur during manufacturing.

[0040] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0041] According to a first aspect of the present invention, a battery cell protection assembly is provided, which specifically includes a pressure relief member 10 and a protection member 20.

[0042] Hereinafter, the specific structure of the battery cell protection assembly according to the present embodiment as described above will be described.

[0043] In this embodiment, if Figure 8 and Figure 9 As shown, the battery cell protection component is arranged on the battery cell cover 30, and the battery cell cover 30 is provided with an exhaust hole 40. The exhaust hole 40 is a through-hole structure connecting the inside and outside of the battery cell. When the battery cell fails and gas is generated inside, pressure is released through the exhaust hole 40 to ensure the safety performance of the battery cell.

[0044] Specifically, Figure 9 and Figure 10 As shown, the pressure relief member 10 is embedded in the exhaust hole 40 to achieve blocking of the exhaust hole 40 through the pressure relief member 10 . The pressure relief member 10 may be an explosion-proof valve. The pressure relief member 10 is preferably welded and fixed to the cell cover plate 30 .

[0045] In a preferred embodiment, Figure 9 and Figure 10 As shown, a protruding boss 41 is formed on the inner wall of the exhaust hole 40, and the boss 41 is arranged at one end of the exhaust hole 40 facing the outside of the battery cell, and the pressure relief member 10 abuts against one end of the boss 41 facing the inside of the battery cell, so that the boss 41 can play a certain supporting and positioning role for the pressure relief member 10, ensuring that the pressure relief member 10 is firmly fixed to the exhaust hole 40. The boss 41 is preferably formed into an annular structure and protrudes inwardly along the radial direction of the exhaust hole 40, so as to improve the effectiveness and reliability of the supporting role for the pressure relief member 10.

[0046] Furthermore, in this embodiment, if Figure 9 and Figure 10 As shown, the pressure relief member 10 is provided with a recessed notch 111, and the pressure inside the battery cell can break through the pressure relief member 10, so that the pressure relief member 10 cracks along the shape of the notch 111, and the air pressure inside the battery cell opens part of the pressure relief member 10 outward, thereby achieving communication between the inside and outside of the battery cell. The notch 111 can be an annular structure with an opening, so that when the pressure relief member 10 is broken, the opened part remains connected to the unopened part, thereby avoiding the metal sheet from falling off and causing a short circuit. Preferably, the notch 111 is provided on the side of the pressure relief member 10 facing the outside of the battery cell, so as to ensure that the pressure relief member 10 can be opened in time when the preset pressure is reached in the battery cell.

[0047] In an alternative embodiment, Figure 9 and Figure 10As shown, a concave thinning groove 11 is provided on the side of the pressure relief member 10 facing the outside of the battery cell, and a notched portion 111 is provided on the bottom wall of the thinning groove 11, so as to ensure that the circumferential edge of the pressure relief member 10 has sufficient structural strength to prevent the pressure relief member 10 from being deformed and opening prematurely, and to reduce the thickness of the area where the notched portion 111 is provided, so as to facilitate the pressure relief member 10 to be opened outward, increase the exhaust area, and achieve rapid pressure relief.

[0048] In this embodiment, if Figures 1 to 10 As shown, the protective member 20 is attached to the side of the battery cover 30 facing the outside of the battery cell and covers the exhaust hole 40; specifically, the protective member 20 is attached to the end of the boss 41 facing the outside of the battery cell to protect the pressure relief member 10 arranged inside the exhaust hole 40.

[0049] More specifically, if Figures 1 to 7 As shown, the protective member 20 includes a protective portion 21 and an adhesive portion 22 which are stacked. The protective portion 21 can be a film of PET material, and the adhesive portion 22 can be a glue layer. There is no groove or hole structure on the protective portion 21 so that it can completely cover the exhaust hole 40. The adhesive portion 22 is sandwiched between the battery cover 30 and the protective portion 21, so that the protective member 20 is adhered to the surface of the battery cover 30. A guide groove 221 connecting the exhaust hole 40 and the outside of the battery cell is opened on the adhesive portion 22, so that the guide groove 221 is opened on the side of the protective member 20 and will not damage the structure of the protective portion 21, so as to ensure the integrity of the protective portion 21, meet the protection and exhaust requirements of the pressure relief member 10, effectively reduce the risk of contamination of the pressure relief member 10, thereby improving the reliability of the safety protection of the battery cell.

[0050] In this embodiment, if Figure 5 As shown, the width of the guide groove 221 before the protective member 20 is attached is W, W ≥ 0.1 mm, and the total area of the guide groove 221 is X, in mm 2 ; The area of the protective member 20 is Y, in mm 2 ; The area of the exhaust hole 40 is Z, in mm 2 ; M = X / Z, 0.005≤M≤0.14; N = X / (YZ), 14.5%≤N≤33%, so that after the protective member 20 is attached, it is ensured that the exhaust hole 40 can be connected to the outside of the battery cell, so that the guide groove 221 has a reliable conduction function. It should be noted that the total area X of the guide groove 221 is the sum of the areas of the projections of all the guide grooves 221 on the protective member 20 along the thickness direction of the protective member 20, the area Y of the protective member 20 is the area of the plane where the protective part 21 is located, and the area Z of the exhaust hole 40 is the area of the opening part of the exhaust hole 40 that can connect the inside and outside of the battery cell.

[0051] Next, cell safety tests are carried out on cells with different X, Y, and Z dimensions to verify whether the exhaust capacity of the pressure relief part 10 is reliable and whether the protection part 20 can be firmly pasted. The test results are shown in Table 1 below.

[0052] Table 1

[0053]

[0054] Note: In the table, the result of "OK" indicates that the test result is qualified, and the result of "NG" indicates that there are problems during the test.

[0055] Referring to Table 1, it can be seen that in Examples 1 to 8, the cell safety tests are qualified and the protection part 20 is firmly pasted within the limited ranges of 0.005 ≤ M ≤ 0.14 and 14.5% ≤ N ≤ 33%; while in Comparative Example 1, due to the too small parameters of M and N, the exhaust capacity of the pressure relief part 10 is insufficient, which is likely to cause problems such as deformation of the pressure relief part 10 and unstable bursting pressure, resulting in the failure of the cell safety test; in Comparative Example 2, due to the too small parameter of N, the exhaust capacity of the pressure relief part 10 is insufficient, which is likely to cause problems such as deformation of the pressure relief part 10 and unstable bursting pressure, resulting in the failure of the cell safety test; in Comparative Example 3, due to the too large parameter of N, the lack of glue area on the protection part 20 is relatively large, the pasting strength of the protection part 20 is poor and it is easy to fall off, and the risk of pollution and damage to the pressure relief part 10 increases; in Comparative Example 4, due to the too large parameters of M and N, the lack of glue area on the protection part 20 is relatively large, the pasting strength of the protection part 20 is poor and it is easy to fall off, and the risk of pollution and damage to the pressure relief part 10 increases.

[0056] In this embodiment, the diversion groove 221 can be formed into shapes such as polygons, circles, or arcs, as long as it is ensured that the exhaust hole 40 can communicate with the outside of the cell.

[0057] In the first alternative embodiment, as Figures 1 to 5 shown, the protection part 21 can be formed into a structure similar to a runway shape with semi-circular sides and a rectangular middle. In the second alternative embodiment, as Figure 6 and Figure 7 shown, the protection part 21 is formed into a circular structure. However, the structure of the protection part 21 is not limited to this, and it can also be formed into a polygon structure, such as a rectangle, as long as it can effectively block the exhaust hole 40 to achieve a reliable protection effect. In the preferred embodiment, the shape of the protection part 21 is the same as the shape of the exhaust hole 40, so as to ensure that the protection part 21 can effectively cover the exhaust hole 40 without overly blocking the surface of the cell cover 30, avoiding affecting the pasting effect and coverage area of the insulating patch on the cell cover 30.

[0058] In this embodiment, as Figure 3 and Figure 7As shown, the pasting part 22 is formed into an annular structure with an opening, and the diversion groove 221 is arranged at the opening of the annular structure. Preferably, the pasting part 22 is arranged at the edge of the protection part 21 to ensure that the protection piece 20 is firmly fixed on the battery cell cover plate 30 and can also save costs.

[0059] In a preferred embodiment, as Figures 3 to 5 and Figure 7 shown, a plurality of diversion grooves 221 are provided, and the plurality of diversion grooves 221 are arranged at intervals on the pasting part 22 to ensure that there is sufficient exhaust area and the exhaust is uniform.

[0060] Furthermore, in this embodiment, as Figure 3 and Figure 7 shown, at least two diversion grooves 221 are arranged opposite to each other on the pasting part 22, so as to achieve rapid and uniform exhaust.

[0061] In this embodiment, as Figure 4 and Figure 5 shown, the thickness dimension of the protection part 21 is H1, 0.05 mm ≤ H1 ≤ 10 mm, so as to ensure that the protection part 21 has sufficient structural strength to meet the protection requirements for the pressure relief part 10, and also avoid the size of H1 being too large to occupy the battery cell space and affect the energy density of the battery cell.

[0062] In this embodiment, as Figure 5 shown, the thickness dimension of the pasting part 22 is H2, 0.01 mm ≤ H2 ≤ 5 mm, so as to ensure that the pasting part 22 has sufficient bonding strength to avoid the protection piece 20 falling off from the battery cell cover plate 30, and also avoid the size of H2 being too large to occupy the battery cell space and affect the energy density of the battery cell.

[0063] A battery cell protection assembly provided according to the present invention includes a pressure relief part and a protection piece. The pressure relief part is embedded in the exhaust hole; the protection piece is attached to the side of the battery cell cover plate facing the outside of the battery cell and covers the exhaust hole; the protection piece includes a protection part and a pasting part arranged in a stacked manner. The protection part completely covers the exhaust hole, and the pasting part is clamped between the battery cell cover plate and the protection part. A diversion groove communicating the exhaust hole and the outside of the battery cell is provided on the pasting part, so as to ensure the integrity of the protection part, meet the protection and exhaust requirements for the pressure relief part, effectively reduce the risk of the pressure relief part being contaminated, and thus improve the reliability of the safety protection for the battery cell. In addition, the width dimension of the diversion groove before the protection piece is pasted is W, W ≥ 0.1 mm, the total area of the diversion grooves is X, unit: mm 2 ; the area of the protection piece is Y, unit: mm 2 ; the area of the exhaust hole is Z, unit: mm 2; M = X / Z, 0.005 ≤ M ≤ 0.14; N = X / (Y - Z), 14.5% ≤ N ≤ 33%, so that after the protective member is pasted, it is ensured that the exhaust hole can remain connected to the outside of the battery cell, enabling the diversion groove to have a reliable conduction function.

[0064] According to a battery cell provided by the present invention, the battery cell protection assembly as described above is attached to the battery cell cover plate of the battery cell, effectively preventing the pressure relief member from being contaminated, thereby ensuring the bursting strength of the pressure relief member and the safety performance of the battery cell.

[0065] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present application, used to illustrate the technical solutions of the present application, rather than limiting them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: Any person skilled in the art within the technical scope disclosed by the present application can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A battery cell protection component is disposed on a battery cell cover plate, and an exhaust hole is formed in the battery cell cover plate. It is characterized in that The cell protection component includes: A pressure relief member embedded in the exhaust hole; A protection member attached to the side of the cell cover plate facing the outside of the cell and covering the exhaust hole; the protection member includes a protection part and a pasting part arranged in a stacked manner, the protection part completely covers the exhaust hole, the pasting part is clamped between the cell cover plate and the protection part, and a diversion groove communicating the exhaust hole and the outside of the cell is formed on the pasting part. The width dimension of the diversion groove before the protection member is pasted is W, and W≥0.1mm; The total area of the diversion channels is X, with the unit of mm 2 , where X is the sum of the areas of the projections of all the diversion channels on the protective part along the thickness direction of the protective part; the area of the protective part is Y, with the unit of mm 2 , where Y is the area of the plane where the protective portion is located; the area of the exhaust hole is Z, with the unit of mm 2 , where Z is the area of the opening part on the exhaust hole that can communicate the inside and outside of the battery cell; M = X / Z, 0.005 ≤ M ≤ 0.14; N = X / (Y - Z), 14.5% ≤ N ≤ 33%; The pasting part is formed into an annular structure with an opening, and the diversion groove is arranged at the opening of the annular structure; A plurality of the diversion grooves are provided, and the plurality of diversion grooves are arranged at intervals on the pasting part; at least two of the diversion grooves are arranged opposite to each other on the pasting part; The thickness dimension of the protection part is H1, and 0.05mm≤H1≤10mm; The thickness dimension of the pasting part is H2, and 0.01mm≤H2≤5mm.

2. The cell protection component according to claim 1, characterized in that The pasting part is arranged at the edge of the protection part, and the shape of the protection part is the same as the shape of the exhaust hole.

3. The cell protection component according to claim 1, wherein, A convex platform is formed on the inner wall of the exhaust hole, the convex platform is arranged at one end of the exhaust hole facing the outside of the cell, the pressure relief member abuts against one end of the convex platform facing the inside of the cell, and the protection member is attached to one end of the convex platform facing the outside of the cell.

4. The cell protection component according to claim 1, characterized in that, A recessed scoring part is arranged on the pressure relief member, and the pressure inside the cell can break through the pressure relief member, so that the pressure relief member cracks along the shape of the scoring part.

5. A battery cell, characterized in that, Including the cell protection component according to any one of claims 1 to 4.

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