Cell top cover and cell

Abstract

To provide a cell top cover which reduces complexity of assembly and improves safety reliability in use.SOLUTION: A cell top cover includes an aluminum reflection sheet 10 including a top side, an electrode post 20, and an upper plastic assembly 30. An electrode post penetration hole 110 is provided in the aluminum reflection sheet, and the electrode post is provided while being bored in the electrode post penetration hole. The upper plastic assembly is provided at the top side of the aluminum reflection sheet, externally fitted and fixed to the electrode post. A position limiting portion 120 protruding from a peripheral side of the electrode post penetration hole is provided at the top side of the aluminum reflection sheet. The position limiting portion is aligned and connected to the upper plastic assembly and limits the rotation of the upper plastic assembly with respect to the aluminum reflection sheet.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the field of energy storage cell technology, and in particular to cell top covers and cells. [Background technology]

[0002] The top cover of the storage cell currently available on the market includes a structure including a pole, an upper plastic assembly, an aluminum reflective sheet, etc., in which a pole through-hole is formed in the aluminum reflective sheet, the upper plastic assembly is located above the pole through-hole of the aluminum reflective sheet, and the pole penetrates the pole through-hole of the aluminum reflective sheet and is fixedly connected to the upper plastic assembly. In order to prevent the pole and the upper plastic assembly from rotating relative to the aluminum reflective sheet during use, which may cause a problem in the safety of the storage cell, the prior art generally fills the gap between the upper plastic assembly and the aluminum reflective sheet with particles to prevent the rotation, but this method is complicated in assembly and has low safety reliability in use.

[0003] Therefore, the cell top cover of the prior art has problems in that the assembly is complicated and the safety and reliability of use is low. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE DISCLOSURE An object of the present invention is to provide a cell top cover and a cell that reduce assembly complexity and improve safety reliability in use. [Means for solving the problem]

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a cell top cover, which includes an aluminum reflective sheet, a pole, and an upper plastic assembly, the aluminum reflective sheet is provided with a pole through hole, the pole is drilled into the pole through hole, the upper plastic assembly is provided on a top side of the aluminum reflective sheet, and is fitted and fixed to the pole, the top side of the aluminum reflective sheet is provided with a position limiting portion protruding from the peripheral side of the pole through hole, and the position limiting portion, together with the upper plastic assembly, limits the rotation of the upper plastic assembly relative to the aluminum reflective sheet.

[0006] In the present invention, the position of the upper plastic assembly is limited to the aluminum reflective sheet only by the position limiting part, and the rotation of the upper plastic assembly relative to the aluminum reflective sheet can be limited, compared to the conventional method of filling particles between the upper plastic assembly and the aluminum reflective sheet to prevent rotation. Since the position limiting part is provided, the rotation of the upper plastic assembly relative to the aluminum reflective sheet can be limited by simply attaching the upper plastic assembly of the cell top cover of the present invention to the aluminum reflective sheet, and there is no need to fill additional particles between the upper plastic assembly and the aluminum reflective sheet, which reduces the complexity of assembly of the cell top cover. In addition, compared to the method of filling particles between the upper plastic assembly and the aluminum reflective sheet to increase the friction between the upper plastic assembly and the aluminum reflective sheet to prevent rotation of the upper plastic assembly relative to the aluminum reflective sheet, the method of limiting the rotation of the upper plastic assembly relative to the aluminum reflective sheet by the position limiting part is more reliable, and therefore the safety reliability of the cell top cover can be improved. Therefore, this cell top cover can reduce the complexity of assembly and improve the safety reliability of use.

[0007] The position limiting portion is a protrusion structure provided around the pole post through hole, and a recess corresponding to the protrusion structure is provided on the bottom side of the upper plastic assembly, and the protrusion structure is engaged in the recess. This makes it possible to limit the rotation of the upper plastic assembly relative to the aluminum reflective sheet with a simple structure, and makes the structure between the upper plastic assembly and the aluminum reflective sheet simpler.

[0008] The protruding structure includes a first boss and a second boss, the first boss protruding upward from the periphery of the electrode post through hole, and the second boss protruding upward from a portion of the top side of the first boss. In this way, by providing a two-layer position limiting structure consisting of the first boss and the second boss, it is possible to increase the torque resistance ability between the upper plastic assembly and the aluminum reflective sheet, improve the reliability of the position limiting part, and further increase the safety and reliability of the use of the cell top cover. In addition, the first boss 1 acts as a stopper on the periphery of the electrode post through hole, and can prevent the electrolyte in the cell structure from leaking from the electrode post through hole.

[0009] In addition, the first boss has a rectangular shape, the second boss has a rod shape, the first boss is provided with a plurality of the second bosses, and the plurality of the second bosses are evenly provided on both sides in the longitudinal direction of the first boss. In this way, the torque resistance ability of the plurality of rod-shaped second bosses is strengthened, and the reliability of the position limiting part can be further improved.

[0010] Furthermore, the second boss has an arc shape, and the center of the arc of the second boss does not coincide with the center of the pole post through hole.

[0011] In addition, the first boss and the second boss are integrally molded with the aluminum reflective sheet, the pole is integrally molded with the upper plastic assembly after passing through the pole through hole, and the bottom side of the upper plastic assembly is in close contact with the top side of the aluminum reflective sheet. In this way, the first boss and the second boss are integrally molded with the aluminum reflective sheet, which contributes to the processing and manufacturing of the aluminum reflective sheet, and the upper plastic assembly and the pole are integrally molded with each other and are in close contact with the top side of the aluminum reflective sheet, which helps to improve the sealing between the upper plastic assembly and the pole and the aluminum reflective sheet.

[0012] The recess includes a first sink recessed from the bottom side of the upper plastic assembly in a direction away from the aluminum reflective sheet, and the shape of the first sink matches the shape of the first boss. In this way, the first sink is closely attached to the first boss, which can prevent the electrolyte in the cell structure from leaking from the electrode post through-hole, improve the torque resistance ability of the first sink and the first boss, and increase the reliability of the protrusion structure and the recess.

[0013] The recess further includes a second sink recessed from a portion of the bottom side of the first sink in a direction away from the aluminum reflective sheet, and the second sink and the second boss have matching shapes. In this way, the second sink is closely attached to the second boss, which can prevent the electrolyte in the cell structure from leaking from the pole through-hole, increase the torque resistance of the second sink and the second boss, and further improve the positioning ability between the protrusion structure and the recess, thereby increasing the reliability.

[0014] In addition, a fitting portion is provided on the peripheral side of the terminal post at a position corresponding to the terminal post through hole, and a mating portion is provided on the inner wall of the terminal post through hole, and the fitting portion matches with the mating portion to fix the terminal post in the terminal post through hole. In this way, since the upper plastic assembly is fitted onto and fixed to the terminal post, and the terminal post is fixed in the terminal post through hole of the aluminum reflective sheet, it is possible to further prevent the upper plastic assembly from rotating relative to the aluminum reflective sheet and to improve the safety and reliability of the cell top cover.

[0015] An embodiment of the present invention further provides a cell including any one of the cell top covers described above. In this cell, the rotation of the upper plastic assembly relative to the aluminum reflective sheet can be restricted by simply mounting the upper plastic assembly of the cell top cover on the aluminum reflective sheet, and there is no need to fill additional particles between the upper plastic assembly and the aluminum reflective sheet, reducing the complexity of assembling the cell top cover. Furthermore, the method of restricting the rotation of the upper plastic assembly relative to the aluminum reflective sheet by the position limiting part has high reliability, thereby improving the safety and reliability of the use of the cell top cover. [Brief description of the drawings]

[0016] One or more embodiments are illustratively illustrated in the accompanying drawing figures, but these illustrative illustrations are not intended to be limiting of the embodiments, in which like reference numbers represent like parts and, unless otherwise noted, the drawings are not drawn to scale. [Figure 1] FIG. 1 is an exploded view of a cell top cover according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an assembly diagram of a cell top cover according to an embodiment of the present invention. [Diagram 3] FIG. 3 is a diagram showing the structure of an aluminum reflective sheet of a cell top cover according to an embodiment of the present invention. [Figure 4]FIG. 4 is a diagram showing a top view of an aluminum reflecting sheet of a cell top cover according to an embodiment of the present invention. [Diagram 5] FIG. 5 is a diagram showing a cross-sectional structure of the aluminum reflective sheet of FIG. [Figure 6] FIG. 6 is a diagram showing the configuration of the upper plastic assembly of the cell top cover according to the embodiment of the present invention. [Figure 7] FIG. 7 is a diagram showing a cross-sectional configuration of FIG. [Explanation of symbols]

[0017] 10: aluminum reflective sheet, 110: pole through hole, 111: mating portion, 120: position limiting portion, 121: first boss, 122: second boss, 20: pole, 210: fitting portion, 30: upper plastic assembly, 310: recess, 311: first sink, 312: second sink, 40: under plastic assembly, 50: explosion-proof valve, 60: seal ring, X: longitudinal direction of first boss. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] In order to clarify the purpose, technical ideas and advantages of the embodiments of the present invention, the following detailed description will be given of each embodiment of the present invention with reference to the drawings. However, in each embodiment of the present invention, many technical details are described in order to allow the reader to fully understand the present invention, but it is obvious to those skilled in the art that the technical solution protected by the present invention can be realized without these technical details and various changes and modifications based on the following embodiments.

[0019] In the embodiments of the present invention, the orientations or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. are orientations or positional relationships indicated based on the drawings. These terms are primarily intended to better explain the present invention and its embodiments, and are not used to limit that the indicated devices, units or components must have a specific orientation or be configured and operated in a specific orientation.

[0020] In addition, some of the above terms can be used to express other meanings in addition to expressing an orientation or positional relationship. For example, the term "up" can also be used to express a dependency or connection relationship in some cases. Those skilled in the art can understand the specific meanings of these terms in the present invention according to specific situations.

[0021] Furthermore, the terms "attach", "install", "installed", "established", "connected" and "connected" should be understood in a broad sense. For example, they may be fixed connections, removable connections, or integral structures, mechanical connections, or electrical connections, and may be direct connections, indirect connections through intermediate media, or internal communication between two devices, units or components. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0022] Furthermore, the terms "first", "second", etc. are primarily used to distinguish between different devices, units or components (which may be of the same or different specific type and configuration) and are not intended to state or imply the relative importance or quantity of the designated devices, units or components. Unless otherwise specified, "plurality" means two or more.

[0023] In an embodiment of the present invention, a cell top cover is provided, and as shown in Figures 1 and 2, the cell top cover includes an aluminum reflective sheet 10, a pole 20, and an upper plastic assembly 30, in which the aluminum reflective sheet 10 is provided with a pole through hole 110, the pole 20 is drilled into the pole through hole 110, the upper plastic assembly 30 is provided on the top side of the aluminum reflective sheet 10, and is fitted onto and fixed to the pole 20, and the top side of the aluminum reflective sheet 10 is provided with a position limiting portion 120 protruding from the peripheral side of the pole through hole 110, and the position limiting portion 120, together with the upper plastic assembly 30, limits the rotation of the upper plastic assembly 30 relative to the aluminum reflective sheet 10. In some embodiments, the upper plastic assembly 30 is integrally formed of a plastic material, for example, the upper plastic assembly 30 can be manufactured from polypropylene (PP) or other plastic material that is resistant to corrosion and high temperatures.

[0024] In the present invention, the position of the upper plastic assembly 30 is limited to the aluminum reflective sheet 10 only by the position limiting portion 120, thereby limiting the rotation of the upper plastic assembly 30 relative to the aluminum reflective sheet 10. Compared to the conventional technology of filling particles between the upper plastic assembly 30 and the aluminum reflective sheet 10 to prevent rotation, the position limiting portion 120 is provided, so that the rotation of the upper plastic assembly 30 relative to the aluminum reflective sheet 10 can be limited simply by attaching the upper plastic assembly 30 of the cell top cover in the present invention to the aluminum reflective sheet 10, and there is no need to fill additional particles between the upper plastic assembly 30 and the aluminum reflective sheet 10, thereby reducing the complexity of assembly of the cell top cover. In addition, compared to a method of preventing rotation of the upper plastic assembly 30 relative to the aluminum reflective sheet 10 by filling particles between the upper plastic assembly 30 and the aluminum reflective sheet 10 to increase the friction between the upper plastic assembly 30 and the aluminum reflective sheet 10, the method of limiting rotation of the upper plastic assembly 30 relative to the aluminum reflective sheet 10 by the position limiting part 120 is more reliable, and therefore the safety and reliability of the use of the cell top cover can be improved. Therefore, this cell top cover can reduce the complexity of assembly and also improve the safety and reliability of use.

[0025] Specifically, the position limiting portion 120 may be a structure such as a protrusion, an adsorption member, etc. Preferably, in this embodiment, the position limiting portion 120 is a protrusion structure provided on the periphery of the pole post through hole 110, and a recess 310 corresponding to the protrusion structure is provided on the bottom side of the upper plastic assembly 30, and the protrusion structure is engaged in the recess 310, so that the rotation of the upper plastic assembly 30 relative to the aluminum reflective sheet 10 can be restricted with a simple structure, and the structure between the upper plastic assembly 30 and the aluminum reflective sheet 10 becomes simpler.

[0026] More specifically, as shown in Fig. 3 to Fig. 5, the protrusion structure includes a first boss 121 and a second boss 122, the first boss 121 protruding upward from the circumferential side of the electrode post through hole 110, and the second boss 122 protruding upward from a partial area on the top side of the first boss 121. In this way, by providing a two-layer position limiting structure of the first boss 121 and the second boss 122, it is possible to increase the resistance ability against torque between the upper plastic assembly 30 and the aluminum reflective sheet 10, improve the reliability of the position limiting part 120, and further increase the safety reliability in use of the cell top cover. In addition, the first boss 121 plays the role of a stopper against the circumferential side of the electrode post through hole 110, and can prevent the electrolyte in the cell structure from leaking from the electrode post through hole 110.

[0027] More specifically, there is a smooth transition between the first boss 121 and the circumferential side of the pole post through hole 110. The shape of the first boss 121 may be the same as or different from the shape of the upper plastic assembly 30. Preferably, the shape of the first boss 121 is the same as the shape of the upper plastic assembly 30 in order to improve the sealing between the first boss 121 and the upper plastic assembly 30 and increase the reliability of the first boss 121. Also, the first boss 121 may be a circular boss, a rectangular boss, an irregular boss, or the like. In this embodiment, the cross-sectional shape of the first boss 121 in the direction parallel to the top side of the aluminum reflective sheet 10 is rectangular, and the second boss 122 is rod-shaped. The second boss 122 may be a linear boss or a non-linear boss, and the non-linear boss may be specifically S-shaped, C-shaped or arc-shaped, etc., and when the second boss 122 is arc-shaped, the center of the arc of the second boss 122 does not coincide with the center of the pole pillar through hole 110, so that the second boss 122 can be prevented from losing its ability to resist torque when the center of the arc coincides with the center of the circle.

[0028] The first boss 121 is provided with a plurality of second bosses 122, and the plurality of second bosses 122 are evenly provided on two sides arranged along the longitudinal direction X of the first boss 121 (for example, evenly provided on two short sides). Specifically, the number of second bosses 122 may be set to two, and the two second bosses 122 are provided on both sides of the first boss 121 in the longitudinal direction X, respectively, and the number of second bosses 122 may be set to four, and the four second bosses 122 are provided two on each side of the first boss 121 in the longitudinal direction X. The rest can be inferred from this. Also, the number of second bosses 122 may be an odd number, such as three or five. In the case of three, one second boss 122 is provided on one side of the first boss 121 in the longitudinal direction X, and two second bosses 122 are provided on the other side. In this way, the torque resistance ability of the multiple rod-shaped second bosses 122 is increased, further improving the reliability of the position limiting portion 120. In this embodiment, in order to ensure the torque resistance ability of the second bosses 122 and to prevent the protrusion structure from becoming too complicated, it is preferable to provide two second bosses 122. The second bosses 122 may be arranged evenly on the two long sides of the first boss 121.

[0029] Furthermore, the shape of the recess 310 and the shape of the protrusion structure may be the same or different. Preferably, the shape of the recess 310 is the same as the shape of the protrusion structure in order to improve the reliability of the sealing and twist prevention between the first boss 121 and the upper plastic assembly 30. Specifically, as shown in FIG. 6 and FIG. 7, the recess 310 includes a first sink 311 recessed from the bottom side of the upper plastic assembly 30 in a direction away from the aluminum reflective sheet 10, and the shape of the first sink 311 matches the shape of the first boss 121. In this way, by closely contacting the first sink 311 with the first boss 121, it is possible to prevent the electrolyte in the cell structure from leaking from the electrode post through hole 110, improve the torque resistance ability of the first sink 311 and the first boss 121, and increase the reliability of the protrusion structure and the recess 310. The shape of the first sink 311 matching the shape of the first boss 121 refers to the two having substantially the same shape, for example, the first sink 311 may be a square sink, a circular sink, or an irregular sink.

[0030] The recess 310 further includes second sinks 312 recessed from a portion of the bottom side of the first sink 311 in a direction away from the aluminum reflective sheet 10, and the second sinks 312 and the second bosses 122 have matching shapes and are equal in number. In this way, by closely contacting each second sink 312 with the corresponding second boss 122, it is possible to prevent the electrolyte in the cell structure from leaking from the electrode post through-hole 110, to increase the torque resistance ability of the second sinks 312 and the second bosses 122, to further improve the position limiting ability between the protrusion structure and the recess 310, and to thereby increase the reliability. The shape of the second sink 312 matching the shape of the second boss 122 means that the two shapes are approximately the same. For example, the second sink 312 may be a linear sink or a non-linear sink. The non-linear sink may be specifically S-shaped, C-shaped or arc-shaped, and if the second sink 312 is arc-shaped, the center of the second sink 312 does not coincide with the center of the pole post through hole.

[0031] Furthermore, the first boss 121 and the second boss 122 are integrally molded with the aluminum reflective sheet 10, the pole 20 is integrally molded with the upper plastic assembly 30 after penetrating the pole through hole 110, and the bottom side of the upper plastic assembly 30 and the top side of the aluminum reflective sheet 10 are in close contact with each other. In this way, the first boss 121 and the second boss 122 are integrally molded with the aluminum reflective sheet 10, which contributes to the processing and manufacturing of the aluminum reflective sheet 10, and the upper plastic assembly 30 and the pole 20 are integrally molded with each other and in close contact with the top side of the aluminum reflective sheet 10, which helps to improve the sealing between the upper plastic assembly 30 and the pole 20 and between the upper plastic assembly 30 and the aluminum reflective sheet 10. In addition, the first boss 121 and the second boss 122 are integrally molded with the aluminum reflective sheet 10 by extrusion molding, and the upper plastic assembly 30 is integrally molded with the pole 20 by injection molding.

[0032] 1 to 3, a fitting portion 210 is provided on the circumferential side of the terminal post 20 at a position corresponding to the terminal post through hole 110, and a matching portion 111 is provided on the inner wall of the terminal post through hole 110, and the shape of the fitting portion 210 matches the shape of the matching portion 111, thereby fixing the terminal post 20 to the terminal post through hole 110. In this way, the upper plastic assembly 30 is fitted onto and fixed to the terminal post 20, and the terminal post 20 is fixed within the terminal post through hole 110 of the aluminum reflective sheet 10, which further prevents the upper plastic assembly 30 from rotating relative to the aluminum reflective sheet 10 and enhances the safety and reliability of the cell top cover.

[0033] Specifically, the fitting portion 210 may be a structure such as a screw, a locking groove, etc., and accordingly, the mating portion 111 has a structure matching the fitting portion 210, and can be specifically set according to actual design and usage needs. In this embodiment, there is no particular limitation thereon.

[0034] In addition, the pole 20 includes a positive pole and a negative pole, and accordingly, the pole through hole 110 includes a positive pole through hole 110 for drilling the positive pole and a negative pole through hole 110 for drilling the negative pole. The cell top cover further includes structures such as an under plastic assembly 40, an explosion-proof valve 50, and a seal ring 60, and the pole 20 passes through the under plastic assembly 40, the aluminum reflective sheet 10, and the upper plastic assembly 30 in order, and is integrally molded with the upper plastic assembly 30, and the seal ring 60 is provided between the under plastic assembly 40 and the aluminum reflective sheet 10, and is fitted to the pole 20. The seal ring 60 includes a positive seal ring and a negative seal ring, and the upper plastic assembly includes a positive upper plastic assembly and a negative upper plastic assembly. The material of the under plastic assembly 40 may be the same as that of the upper plastic assembly.

[0035] In an embodiment of the present invention, there is further provided a cell including any one of the cell top covers described above. In this cell, the rotation of the upper plastic assembly 30 relative to the aluminum reflective sheet 10 can be restricted by simply mounting the upper plastic assembly 30 of the cell top cover on the aluminum reflective sheet 10, and there is no need to fill additional particles between the upper plastic assembly 30 and the aluminum reflective sheet 10, which reduces the complexity of assembling the cell top cover. Furthermore, the method of restricting the rotation of the upper plastic assembly 30 relative to the aluminum reflective sheet 10 by the position limiting part 120 has high reliability, which in turn increases the safety and reliability of the use of the cell top cover.

[0036] Specifically, the cell includes a cell top cover and a cell body, the cell top cover is provided on the top side of the cell body, and the electrolyte in the cell is provided in the cell body. One end of the electrode post 20 in the cell top cover extends into the cell body and is used to connect the electrodes in the cell body, and the other end of the electrode post 20 extends through the cell top cover to the outside of the cell and is used to connect an external circuit.

[0037] The above is a detailed description of the cell top cover and cell according to the embodiment of the present invention. In this specification, the principle and embodiment of the present invention are described using specific examples, but the description of the above embodiment is only used to help understand the idea of ​​the present invention, and both the specific embodiment and the scope of application are subject to change. In short, the contents of this specification should not be understood as limiting the present invention.

Claims

1. The present invention includes an aluminum reflective sheet having a top side, a pole, and an upper plastic assembly. The aluminum reflective sheet is provided with a pole through hole, the pole is drilled into the pole through hole, the upper plastic assembly is provided on a top side of the aluminum reflective sheet, and is fitted and fixed to the pole; a position limiting portion protruding from a peripheral side of the pole post through hole is provided on a top side of the aluminum reflective sheet, the position limiting portion being aligned with and connected to the upper plastic assembly to limit rotation of the upper plastic assembly relative to the aluminum reflective sheet; A cell top cover characterized by:

2. The position limiting portion is a protruding structure provided on the periphery of the pole post through hole, and a recess corresponding to the protruding structure is provided on the bottom side of the upper plastic assembly close to the aluminum reflective sheet, and the protruding structure is engaged in the recess.

2. The cell top cover according to claim 1.

3. the protruding structure includes a first boss and a second boss, the first boss protruding upward from a peripheral side of the pole post through hole, and the second boss protruding upward from a partial region of a top side of the first boss that is away from the aluminum reflective sheet; 3. The cell top cover according to claim 2.

4. the first boss has a rectangular shape, the second boss has a rod shape, the first boss is provided with a plurality of the second bosses, and the plurality of the second bosses are evenly provided on two sides arranged along a longitudinal direction of the first boss; 4. The cell top cover according to claim 3.

5. The second boss has an arc shape, and the center of the arc of the second boss does not coincide with the center of the pole post through hole.

5. The cell top cover according to claim 4.

6. the first boss and the second boss are integrally formed with the aluminum reflective sheet, the pole is integrally molded with the upper plastic assembly after passing through the pole through hole, and a bottom side of the upper plastic assembly close to the aluminum reflective sheet is in close contact with a top side of the aluminum reflective sheet; 4. The cell top cover according to claim 3.

7. the recess includes a first sink recessed from a bottom side of the upper plastic assembly close to the aluminum reflective sheet in a direction away from the aluminum reflective sheet, and the shape of the first sink matches the shape of the first boss; 4. The cell top cover according to claim 3.

8. The recess further includes a second sink that is recessed from a portion of a bottom side of the first sink that is close to the aluminum reflective sheet in a direction away from the aluminum reflective sheet, and the second sink and the second boss have matching shapes.

8. The cell top cover according to claim 7.

9. a fitting portion is provided on the circumferential side of the pole post at a position corresponding to the pole post through hole, and a mating portion is provided on an inner wall of the pole post through hole, and the fitting portion matches with the mating portion to fix the pole post in the pole post through hole; 2. The cell top cover according to claim 1.

10. A cell top cover according to any one of claims 1 to 9. A cell characterized by:

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