Top cover assembly and square shell battery
The top cover assembly for square shell batteries uses clamping grooves and blocks to stabilize the conductive block, addressing deformation issues and preventing electrolyte leakage by ensuring secure positioning and riveting, thus enhancing safety.
Patent Information
- Application Number
- CN202323320335.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-06
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-06
AI Technical Summary
The conductive block in the top cover assembly of square shell batteries is prone to deformation and warping during the riveting process, leading to loss of positioning function and potential electrolyte leakage due to torsional deformation of the pole.
A top cover assembly design that includes clamping grooves and blocks to securely hold the conductive block, along with a riveting mechanism that shortens the distance between the conductive block end and the riveting position, ensuring stable positioning and preventing deformation.
The solution effectively prevents the conductive block from rotating and warping, thereby avoiding electrolyte leakage and enhancing the safety of the top cover assembly and square shell battery.
Smart Images
Figure CN222261318U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of square shell batteries, in particular to a top cover assembly and a square shell battery. Background Art
[0002] The top cover assembly includes a top cover, an upper plastic, a conductive block, a pole and a lower plastic. The upper plastic is fixed on the top cover. A slot is provided on the top surface of the upper plastic. The outer wall of the conductive block fits with the inner wall of the slot so that the conductive block is snapped into the slot. One end of the pole is arranged between the lower plastic and the pole ear of the battery cell, and the other end of the pole passes through the lower plastic, the top cover and the upper plastic in sequence and is riveted to the conductive block.
[0003] However, during the riveting process between the conductive block and the pole, the conductive block is prone to deformation and end warping. Since the conductive block is thin, the two ends of the deformed conductive block are prone to warping from the slot, causing the slot to lose its positioning function on the conductive block, resulting in the pole being easily twisted and deformed, causing electrolyte leakage, making the top cover assembly less safe to use.
[0004] In view of the above problems, top cover components and square shell batteries are urgently needed to solve the above problems. Utility Model Content
[0005] The purpose of the utility model is to provide a top cover assembly and a square shell battery, which helps to prevent the two ends of the conductive block from warping out of the clamping groove, thereby causing the clamping groove to lose its positioning effect on the conductive block, thereby preventing the pole from torsional deformation, and ensuring the safety of the top cover assembly and the square shell battery.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] Top cover assembly, including:
[0008] A top cover, an upper plastic and a conductive block arranged on the top cover, wherein a clamping groove is arranged in the upper plastic, and the conductive block is clamped into the clamping groove;
[0009] A first clamping block is disposed on one of the upper plastic and the conductive block, and a first clamping groove matched with the first clamping block is disposed on the other one.
[0010] As an optional solution, the first card block is arranged in the card groove on the upper plastic and is connected to the inner side wall of the card groove; the first card groove is opened on the bottom surface of the conductive block and extends to the end surface of the conductive block, and the first card block is inserted into the corresponding first card groove and can fit with the inner side wall of the first card groove.
[0011] As an optional solution, two first clamping blocks and two first clamping slots are respectively provided, and the two first clamping blocks are respectively located at two ends of the upper plastic in the length direction thereof.
[0012] As an optional solution, the top cover assembly also includes a lower plastic and a pole, the lower plastic is located on a side of the top cover away from the upper plastic, one end of the pole is arranged on the lower plastic, and the other end of the pole passes through the lower plastic, the top cover, the upper plastic and the conductive block in sequence and is riveted to the center position of the conductive block.
[0013] As an optional solution, a second clamping block is provided on one of the upper plastic and the conductive block, and a second clamping groove is provided on the other, and the second clamping block and the second clamping groove are both arranged close to the pole; when the conductive block is clamped into the clamping groove, the second clamping block is clamped into the second clamping groove.
[0014] As an optional solution, the second clamping block is arranged in the clamping groove of the upper plastic and is arranged close to the pole; the second clamping groove is arranged on the bottom end surface of the conductive block and is close to the center position of the conductive block.
[0015] As an optional solution, the pole includes:
[0016] A column and a connector, wherein the column is connected to the connector, and the connector is snapped onto the bottom end surface of the lower plastic. The column passes through the lower plastic, the top cover, the upper plastic and the conductive block in sequence and is riveted to the conductive block. The connector is used to connect to the tab on the battery cell.
[0017] As an optional solution, a third card block is provided on one of the top cover and the upper plastic, and a third card slot is provided on the other, and the third card block can be snapped into the third card slot to limit the upper plastic to the top cover.
[0018] As an optional solution, a sealing ring is connected between the column and the top cover.
[0019] A square-shell battery comprises the top cover assembly, a battery cell and a shell as described above, wherein the battery cell is located in the shell, the top cover assembly covers the open end at the top of the shell, and the pole is electrically connected to the pole ear on the battery cell.
[0020] The beneficial effects of the utility model are:
[0021] The upper plastic is fixedly arranged on the top cover, and the conductive block is clamped in the clamping groove of the upper plastic, and a first clamping block is arranged on one of the upper plastic and the conductive block, and a first clamping groove that cooperates with the first clamping block is arranged on the other, so that the clamping degree between the conductive block and the upper plastic can be increased, so that even if the conductive block is deformed and causes its two ends in the length direction to curl up, the first clamping block can still be partially located in the first clamping groove, and cooperate with the first clamping groove to position the conductive block and the upper plastic, thereby preventing the twisting of the pole from affecting the battery.
[0022] In addition, by riveting the pole and the center position of the conductive block together, the distance between the end of the conductive block in the length direction and the riveting position is shortened, so as to reduce the degree of deformation and warping of the conductive block during the riveting process, and reduce the degree to which the two ends of the conductive block are upwardly warped from the snap-in groove, thereby ensuring the positioning effect of the snap-in groove on the conductive block and preventing the conductive block from moving in the snap-in groove, so as to avoid the problem of electrolyte leakage due to torsional deformation of the pole, thereby ensuring that the entire top cover assembly is highly safe to use and improving the safety of square shell batteries. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the exploded structure of the square shell battery provided by the utility model;
[0024] Figure 2 It is a schematic diagram of a partially exploded structure of the top cover assembly provided by the utility model (excluding part of the structure of the top cover) at one viewing angle;
[0025] Figure 3 It is a schematic diagram of a partially exploded structure of the top cover assembly provided by the utility model (excluding part of the structure of the top cover) at another viewing angle;
[0026] Figure 4 It is a schematic diagram of the actual structure of the upper plastic and conductive block products in the top cover assembly provided by the utility model;
[0027] Figure 5 It is a schematic diagram of the actual structure of the top cover product in the top cover assembly provided by the utility model.
[0028] Description of reference numerals:
[0029] 10-shell; 20-cell; 201-ear;
[0030] 1-top cover; 11-third clamping block; 12-explosion-proof valve; 121-notch; 13-explosion-proof hole; 14-protection sheet; 15-liquid injection hole;
[0031] 2-upper plastic; 21-card groove; 22-first card block; 23-second card block; 24-third card slot;
[0032] 3-conductive block; 31-pole hole; 32-first slot; 33-second slot;
[0033] 4-lower plastic; 41-leakage hole;
[0034] 5-pole; 51-column; 52-connector;
[0035] 6- Sealing ring. DETAILED DESCRIPTION
[0036] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.
[0037] Any feature disclosed in this specification, unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features. Throughout the specification, the same reference numerals indicate the same elements.
[0038] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.
[0039] This embodiment provides a top cover assembly and a square shell battery including the top cover assembly, such as Figure 1 As shown, the square shell battery also includes a battery cell 20 and a shell 10, the battery cell 20 is placed in the shell 10, and the top cover assembly is covered at the open end of the top of the shell 10 to encapsulate and form a complete square shell battery; wherein, the pole 5 in the top cover assembly is electrically connected to the pole ear 201 on the battery cell 20, so that the electric energy of the battery cell 20 can be led out of the shell 10 through the pole 5, so as to realize the purpose of the battery cell 20 supplying power to the electrical equipment outside the shell 10, and the electrical equipment can be, for example, a lighting lamp. In this embodiment, the shell 10 is specifically a square structure.
[0040] Specifically, if Figure 1As shown, the top cover assembly includes a top cover 1, an upper plastic 2, a conductive block 3, a lower plastic 4 and the above-mentioned pole 5; wherein the upper plastic 2 is fixedly arranged on the top surface of the top cover 1, and a clamping groove 21 is arranged in the upper plastic 2, and the conductive block 3 is clamped in the clamping groove 21 so that the outer wall surface of the conductive block 3 fits with the inner wall surface of the clamping groove 21; the lower plastic 4 is located below the top cover 1, one end of the pole 5 is clamped at the bottom of the lower plastic 4, and the other end of the pole 5 passes through the lower plastic 4, the top cover 1, the upper plastic 2 and the conductive block 3 in sequence and is riveted to the conductive block 3, and the pole 5 is connected to the pole ear 201 on the battery cell 20, so as to realize that the pole ear 201 on the battery cell 20 is electrically connected to the conductive block 3 through the pole 5, so that the battery cell 20 supplies power to the electrical equipment outside the shell 10.
[0041] like Figures 1 to 3 As shown, a first clamping block 22 is provided on one of the upper plastic 2 and the conductive block 3, and a first clamping groove 32 matched with the first clamping block 22 is provided on the other, and the first clamping block 22 and the first clamping groove 32 are both provided close to the inner side wall of the clamping groove 21, that is, the first clamping block 22 or the first clamping groove 32 is located at the end of the upper plastic 2 in the length direction; when the conductive block 3 is clamped into the clamping groove 21, the first clamping block 22 is clamped into the first clamping groove 32, and the wall surface of the first clamping block 22 is in contact with the wall surface of the first clamping groove 32.
[0042] By providing the first clamping block 22 and the first clamping groove 32, the limiting effect of the upper plastic 2 on the conductive block 3 can be increased, so as to increase the degree of clamping between the conductive block 3 and the upper plastic 2; that is, in the process of riveting the pole 5 and the conductive block 3, even if the end of the conductive block 3 is slightly deformed and the edge is lifted, due to the clamping effect between the first clamping block 22 and the first clamping groove 32 at this time, the first clamping block 22 can still be partially located in the first clamping groove 32, so as to ensure that the conductive block 3 is stably limited in the clamping groove 21, and the conductive block 3 is prevented from rotating, thereby avoiding the problem of electrolyte leakage caused by the torsional deformation of the pole 5, so that the top cover assembly and the square shell battery are safer. Among them, the above-mentioned ends of the conductive block 3 that are prone to deformation and lifting specifically refer to the two ends of the conductive block 3 in its length direction.
[0043] Specifically, in this embodiment, Figure 2 and Figure 3As shown, a first card block 22 is provided on the upper plastic 2, the first card block 22 is located in the card groove 21 and abuts against the inner side wall of the card groove 21, and the first card block 22 extends upward in the direction close to the conductive block 3, that is, the first card block 22 is located at the end of the conductive block 3 in its length direction; a first card groove 32 is provided on the conductive block 3, the first card groove 32 is located at the end of the conductive block 3 in the length direction, the first card groove 32 is located at the bottom end surface of the conductive block 3, and the first card groove 32 extends and penetrates toward the end of the conductive block 3 along the length direction of the conductive block 3; the first card block 22 is inserted into the corresponding first card groove 32 and can fit with the inner side wall of the first card groove 32.
[0044] Furthermore, if Figure 2 and Figure 3 As shown, two first clamping blocks 22 and two first clamping grooves 32 are respectively provided, and the two first clamping blocks 22 are respectively located at the two ends of the upper plastic 2 in the length direction thereof, and correspondingly, the first clamping grooves 32 are respectively provided at the two ends in the length direction of the conductive block 3; so that the two first clamping blocks 22 and the two first clamping grooves 32 can be clamped together, and at the same time, the first clamping grooves 32 are arranged at the ends of the conductive block 3 that are prone to deformation and warping, so as to better ensure that the conductive block 3 is stably limited in the clamping groove 21, prevent the conductive block 3 from rotating, avoid the problem of electrolyte leakage caused by the torsional deformation of the pole 5, and further make the top cover assembly and the square shell battery safer.
[0045] It is worth noting that other numbers of first clamping blocks 22 and first clamping slots 32 may be provided. For example, two first clamping blocks 22 may be provided at one end of the upper plastic 2, or one or more clamping blocks may be provided in a direction close to the pole 5. This is not specifically limited here and needs to be determined according to actual working conditions and clamping requirements. Specifically, Figures 1 to 3 As shown, a second clamping block 23 is further provided on one of the upper plastic 2 and the conductive block 3, and a second clamping groove 33 is further provided on the other, and the second clamping block 23 and the second clamping groove 33 are both provided close to the pole 5; when the conductive block 3 is clamped in the clamping groove 21, the second clamping block 23 is clamped in the second clamping groove 33, and the wall surface of the second clamping block 23 is in contact with the wall surface of the second clamping groove 33.
[0046] By providing the second clamping block 23 and the second clamping groove 33, the limiting effect of the upper plastic 2 on the conductive block 3 can be further increased; that is, during the riveting process of the pole 5 and the conductive block 3, even if the end of the conductive block 3 is slightly deformed and the edge is lifted, due to the clamping effect between the second clamping block 23 and the second clamping groove 33 at this time, it is possible to ensure that the conductive block 3 is stably limited in the clamping groove 21 to prevent the conductive block 3 from rotating, thereby better avoiding the problem of electrolyte leakage caused by the torsional deformation of the pole 5, and further making the top cover assembly and the square shell battery safer.
[0047] That is to say, in this embodiment, three layers of limitation are adopted for the conductive block 3; the first layer of limitation of the conductive block 3 is realized by clamping the conductive block 3 in the clamping groove 21; the second layer of limitation of the conductive block 3 is realized by clamping the first clamping block 22 in the first clamping groove 32; finally, the third layer of limitation of the conductive block 3 is realized by clamping the second clamping block 23 in the second clamping groove 33, so as to ensure that the conductive block 3 is firmly limited in the clamping groove 21, to ensure that the conductive block 3 will not move in the clamping groove 21, and thus to avoid the problem of electrolyte leakage caused by torsional deformation of the pole 5.
[0048] Specifically, Figure 2 and Figure 3 As shown, a second clamping block 23 is provided on the upper plastic 2, and the second clamping block 23 is located in the clamping groove 21 and is arranged close to the pole 5; a second clamping groove 33 is provided on the conductive block 3, and the second clamping groove 33 is located on the bottom end surface of the conductive block 3 and is arranged close to the center position of the conductive block 3.
[0049] When the two ends of the conductive block 3 are deformed and warped, the part closer to the pole 5 has a smaller degree of warping, that is, the distance between the conductive block 3 in this part and the inner bottom end surface of the clamping groove 21 is smaller; therefore, in this embodiment, by providing a second clamping block 23 and a second clamping groove 33 at a position close to the pole 5, the conductive block 3 can be better limited to prevent the conductive block 3 from moving in the clamping groove 21.
[0050] In this embodiment, the first clamping block 22 and the second clamping block 23 are respectively provided at different positions on the periphery of the pole 5 to limit the end and the middle position of the conductive block 3 respectively, thereby ensuring a better limiting effect on the entire conductive block 3.
[0051] Furthermore, if Figure 2 and Figure 3 As shown, two second clamping blocks 23 and two second clamping slots 33 are respectively provided, and the two second clamping blocks 23 are arranged opposite to each other and spaced apart; so that the second clamping slots 33 can be arranged on the conductive block 3 near the pole 5 through the clamping action of the two second clamping blocks 23 and the two second clamping slots 33, so as to better ensure that the conductive block 3 is stably limited in the clamping groove 21, prevent the conductive block 3 from rotating, avoid the problem of electrolyte leakage caused by the torsional deformation of the pole 5, and further make the top cover assembly and the square shell battery safer. In other embodiments, one, three or other numbers of second clamping blocks 23 and second clamping slots 33 can also be provided, which is not limited here.
[0052] The above-mentioned three-layer clamping method is used to limit the conductive block 3 in the upper plastic 2, which can ensure a good limiting effect on the conductive block 3 while facilitating the installation and disassembly between the conductive block 3 and the upper plastic 2, so as to facilitate the replacement of the conductive block 3.
[0053] Specifically, Figures 1 to 3 As shown, a third card block 11 is provided on one of the top cover 1 and the upper plastic 2, and a third card slot 24 is provided on the other. The third card block 11 can be snapped into the third card slot 24, and the wall surface of the third card block 11 fits with the wall surface of the third card slot 24 to limit the upper plastic 2 on the top cover 1, thereby realizing the installation of the upper plastic 2 on the top cover 1, avoiding the upper plastic 2 from moving or shaking and affecting the conductive block 3, and the installation method is simple and convenient. In this embodiment, the third card block 11 is provided on the top end surface of the top cover 1, and the third card slot 24 is provided on the bottom end surface of the upper plastic 2, and the number of the third card block 11 and the third card slot 24 are respectively provided to be two, and here, the number of the third card block 11 and the third card slot 24 is not limited.
[0054] In addition, after the other end of the pole 5 passes through the lower plastic 4, the top cover 1, the upper plastic 2 and the conductive block 3 in sequence, the pole 5 is riveted to the center position of the conductive block 3; that is, a pole hole 31 is provided at the center position of the conductive block 3, and after the top end of the pole 5 passes through the pole hole 31, the top end of the pole 5 is riveted, thereby realizing the riveted connection between the pole 5 and the conductive block 3.
[0055] By riveting the pole 5 and the center position of the conductive block 3 together as described above, the distance between the end of the conductive block 3 in the length direction and the riveting position is shortened, which helps to reduce the degree of deformation and warping of the conductive block 3 during the riveting process, and reduce the degree to which the two ends of the conductive block 3 are upwardly warped from the snap-in groove 21, thereby ensuring that the snap-in groove 21 has a positioning effect on the conductive block 3 and does not allow the conductive block 3 to move in the snap-in groove 21, so as to avoid the problem of electrolyte leakage due to torsional deformation of the pole 5, ensure that the entire top cover assembly is highly safe in use, and improve the safety of square shell batteries.
[0056] Furthermore, if Figure 1 As shown, the pole 5 includes a column 51 and a connector 52, the column 51 is vertically connected to the connector 52, the connector 52 is directly clamped on the bottom end surface of the lower plastic 4, the column 51 passes through the lower plastic 4, the top cover 1, the upper plastic 2 and the pole hole 31 in sequence and is riveted to the conductive block 3, and the connector 52 is used to connect to the pole ear 201 on the battery cell 20.
[0057] Specifically, in this embodiment, Figure 1As shown, since the pole ear 201 of the battery cell 20 is arranged at the top end of the battery cell 20, the connecting piece 52 includes a horizontal connecting piece, which is directly clamped on the bottom end surface of the lower plastic 4, and the column 51 is vertically connected to the horizontal connecting piece; one end of the pole ear 201 facing the horizontal connecting piece is bent and welded to the bottom end surface of the horizontal connecting piece, thereby realizing the welding between the pole ear 201 and the connecting piece 52.
[0058] In other embodiments, when the pole lug 201 is arranged on both sides of the battery cell 20, at this time, the connecting piece 52 includes a vertical piece and a horizontal piece connected in an L shape, the bottom end of the column 51 is arranged on the horizontal piece, the horizontal piece is clamped on the bottom end surface of the lower plastic 4, and the vertical piece is located on one side of the battery cell 20; the pole lug 201 faces the vertical piece and is welded to the side wall of the vertical piece, thereby realizing the welding between the pole lug 201 and the connecting piece 52.
[0059] It is worth noting that the connector 52 is directly snapped onto the bottom surface of the lower plastic 4, and the specific structure of the connector 52 needs to be determined according to the setting position of the pole ear 201 on the battery cell 20. The pole ears 201 at different positions are correspondingly connected to connectors 52 with different structures, thereby ensuring a smooth connection between the pole ear 201 and the connector 52.
[0060] Specifically, if Figure 1 As shown, a sealing ring 6 is connected between the column 51 and the top cover 1, and the sealing ring 6 is used to seal the electrolyte in the shell 10 to prevent the electrolyte in the shell 10 from flowing out from the gap between the column 51 and the top cover 1, thereby ensuring the safety of the square shell battery.
[0061] Furthermore, if Figure 1 As shown, a leakage hole 41 is further provided on the lower plastic 4, and the leakage hole 41 is used to flow out the electrolyte between the top cover 1 and the lower plastic 4; specifically, when the electrolyte flows into between the top cover 1 and the lower plastic 4, the electrolyte can flow back into the shell 10 along the leakage hole 41, avoiding liquid accumulation between the top cover 1 and the lower plastic 4, thereby avoiding the accumulation of liquid to damage the structure on the top cover 1, so as to better protect the structure on the top cover 1.
[0062] Specifically, Figure 1 As shown, an explosion-proof hole 13 is also opened on the top cover 1, and an explosion-proof valve 12 is arranged in the explosion-proof hole 13, and a notch 121 is arranged on the explosion-proof valve 12; when a large amount of gas is generated inside the square shell battery due to an accident, the generated high-temperature and high-pressure gas can directly flush the notch 121 on the explosion-proof valve 12, so that the gas is discharged to the outside of the shell 10, realizing directional explosion protection, so as to ensure the safety of the square shell battery.
[0063] Specifically, if Figure 1As shown, a protective sheet 14 is provided at the explosion-proof hole 13 for covering and protecting the explosion-proof hole 13, which helps to provide protection for the explosion-proof valve 12 and prevent corrosive liquids such as electrolyte from flowing through the explosion-proof hole 13 to the explosion-proof valve 12 and causing the explosion-proof valve 12 to fail.
[0064] Specifically, Figure 1 As shown, the top cover 1 is also provided with a liquid injection hole 15, and the top end of the liquid injection hole 15 is a step surface; after the top cover 1 is placed on the open end of the shell 10, the electrolyte is injected into the shell 10 through the liquid injection hole 15; after the injection is completed, an aluminum sheet is placed on the step surface of the liquid injection hole 15, and the aluminum sheet is heated and melted to fill the entire liquid injection hole 15, and the liquid injection hole 15 can be sealed after cooling. Among them, the aluminum sheet is used to seal the liquid injection hole 15.
[0065] in, Figure 4 This is a schematic diagram of the actual structure of the upper plastic 2 and the conductive block 3 in the top cover assembly provided by the utility model. Figure 5 This is a schematic diagram of the actual structure of the top cover 1 in the top cover assembly provided by the utility model, so that Figure 4 and Figure 5 The structural features of the upper plastic 2 , the conductive block 3 and the top cover 1 are more clearly understood.
[0066] The top cover assembly in this embodiment can reduce the degree of deformation of the end of the conductive block 3 during the riveting process of the conductive block 3 and the pole 5 by shortening the distance between the end of the conductive block 3 in the length direction and the riveting position; at the same time, by providing the clamping groove 21, the first clamping groove 32 / the first clamping block 22 and the second clamping groove 33 / the second clamping block 23, the conductive block 3 is limited in the clamping groove 21 through three layers of clamping, so as to ensure a better limiting effect on the conductive block 3, so as to increase the clamping degree between the conductive block 3 and the upper plastic 2, and avoid the conductive block 3 from rotating in the clamping groove 21; thereby, it is possible to avoid leakage of electrolyte caused by torsional deformation of the pole 5, so as to ensure a higher safety for the top cover assembly and the entire square shell battery.
[0067] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.
Claims
1. A top cover assembly, characterized in that: include: A top cover (1), an upper plastic (2) and a conductive block (3) arranged on the top cover (1), wherein a snap-in groove (21) is arranged in the upper plastic (2), and the conductive block (3) is snap-fitted into the snap-in groove (21); One of the upper plastic (2) and the conductive block (3) is provided with a first clamping block (22), and the other is provided with a first clamping slot (32) that matches the first clamping block (22); The top cover assembly further comprises a lower plastic (4) and a pole (5), wherein the lower plastic (4) is located on a side of the top cover (1) away from the upper plastic (2), one end of the pole (5) is arranged on the lower plastic (4), and the other end of the pole (5) passes through the lower plastic (4), the top cover (1), the upper plastic (2) and the conductive block (3) in sequence and is riveted to the center position of the conductive block (3).
2. The top cover assembly according to claim 1, characterized in that The first clamping block (22) is arranged in the clamping groove (21) on the upper plastic (2) and is connected to the inner side wall of the clamping groove (21); the first clamping groove (32) is opened on the bottom surface of the conductive block (3) and extends to the end surface of the conductive block (3); the first clamping block (22) is inserted into the corresponding first clamping groove (32) and can be fitted with the inner side wall of the first clamping groove (32).
3. The top cover assembly according to claim 2, characterized in that: Two of the first clamping blocks (22) and two of the first clamping slots (32) are provided respectively, and the two first clamping blocks (22) are respectively located at two ends of the upper plastic (2) in the length direction thereof.
4. The top cover assembly according to claim 1, characterized in that: A second clamping block (23) is also provided on one of the upper plastic (2) and the conductive block (3), and a second clamping groove (33) is also provided on the other, and the second clamping block (23) and the second clamping groove (33) are both arranged close to the pole (5); when the conductive block (3) is clamped into the clamping groove (21), the second clamping block (23) is clamped into the second clamping groove (33).
5. The top cover assembly according to claim 4, characterized in that: The second clamping block (23) is arranged in the clamping groove (21) of the upper plastic (2) and is arranged close to the pole (5); the second clamping groove (33) is arranged on the bottom end surface of the conductive block (3) and is close to the center position of the conductive block (3).
6. The top cover assembly according to claim 1, characterized in that: The pole (5) comprises: A column (51) and a connecting piece (52), wherein the column (51) is connected to the connecting piece (52), and the connecting piece (52) is snapped onto the bottom end surface of the lower plastic (4). The column (51) sequentially passes through the lower plastic (4), the top cover (1), the upper plastic (2) and the conductive block (3) and is riveted to the conductive block (3). The connecting piece (52) is used to be connected to a tab (201) on a battery cell (20).
7. The top cover assembly according to any one of claims 1 to 3, characterized in that: A third card block (11) is provided on one of the top cover (1) and the upper plastic (2), and a third card slot (24) is provided on the other, wherein the third card block (11) can be snapped into the third card slot (24) so that the upper plastic (2) is limited to the top cover (1).
8. The top cover assembly according to claim 6, characterized in that: A sealing ring (6) is connected between the column (51) and the top cover (1).
9. Square shell battery, characterized in that: It comprises a top cover assembly, a battery cell (20) and a shell (10) as described in any one of claims 1 to 8, wherein the battery cell (20) is located in the shell (10), the top cover assembly is covered at the open end at the top of the shell (10), and the pole (5) is electrically connected to the pole ear (201) on the battery cell (20).