Poleless top cover assembly, assembly method therefor, battery, and battery pack

Abstract

The present invention relates to the technical field of top cover assemblies. Disclosed are a poleless top cover assembly, an assembly method therefor, a battery, and a battery pack. The poleless top cover assembly comprises a connection element electrically connected to a battery cell, a top cover element, a lower plastic member disposed at a bottom portion of the top cover element, and an upper plastic member disposed at a top portion of the top cover element. The upper plastic member is fixedly connected to the top cover element, and the top cover element is fixedly connected to the lower plastic member. The connection element has an inner connection section electrically connected to the battery cell, and the inner connection section is fixedly connected to the lower plastic member. The connection element has an outer connection section electrically connected to a busbar, and the outer connection section abuts against the upper plastic member. The poleless top cover assembly eliminates terminals and terminal blocks, the inner connection section is electrically connected to the battery cell, and the outer connection section is directly used for electrical connection with the busbar to meet charging and discharging requirements, thereby greatly simplifying the structure and reducing costs. The inner connection section is fixedly connected to the lower plastic member to provide a stable structure, thereby preventing battery cell wobbling caused by pulling forces.

Description

Terminal block top cover assembly and its assembly method, battery and battery pack Technical Field

[0001] This invention patent relates to the technical field of top cover assemblies, specifically to a terminalless top cover assembly and its assembly method, a battery, and a battery pack. Background Technology

[0002] Batteries are widely used in new energy electric vehicles, energy storage, mobile devices and other related products. With the rise of new energy, battery technology and demand are growing rapidly.

[0003] The top cover assembly of the battery includes an upper plastic part, a top cover sheet, a lower plastic part, a terminal post, and a terminal block. The upper plastic part is located on the top of the top cover sheet, the lower plastic part is located at the bottom of the top cover sheet, the terminal block is located on the upper plastic part, and the terminal post passes through the lower plastic part, the top cover sheet, and the upper plastic part and is connected to the terminal block. Technical issues

[0004] In existing technologies, the top cover assembly needs to be arranged with pole posts and pole blocks in order to achieve electrical connection between the battery cell and external electrical components, resulting in a complex overall structure. Technical solutions

[0005] The purpose of this invention is to provide a non-linear cap assembly, which aims to solve the problem of complex structure of cap assemblies in the prior art.

[0006] The present invention is implemented as follows: a terminal block top cover assembly includes a connecting piece electrically connected to the battery cell, a top cover piece, a lower plastic part disposed at the bottom of the top cover piece, and an upper plastic part disposed at the top of the top cover piece; the upper plastic part is fixedly connected to the top cover piece, the top cover piece is fixedly connected to the lower plastic part, the connecting piece has an inner connecting section electrically connected to the battery cell, the inner connecting section is fixedly connected to the lower plastic part; the connecting piece has an outer connecting section electrically connected to the busbar, the outer connecting section abutting against the upper plastic part.

[0007] Furthermore, the connecting piece has a through section that passes through the lower plastic part and the top cover piece and is fixedly arranged. The through section is sealed to the lower plastic part and to the top cover piece.

[0008] Furthermore, the top cover plate has an upper hole, and the lower plastic part has a lower hole. The upper hole and the lower hole are aligned and connected to form a through hole. The through section is inserted into the through hole, and the through hole is filled with colloid. The colloid wraps around the through section, fixing the through section in place and sealing the through section with the lower plastic part and the top cover plate.

[0009] Furthermore, the diameter of the upper hole is different from the diameter of the lower hole, and the lower plastic part protrudes towards the lower hole to form a protrusion, which is covered by the colloid.

[0010] Furthermore, the through section is provided with an outwardly protruding part and an inwardly recessed part, and the colloid wraps around the protruding part and the recessed part.

[0011] Furthermore, the top of the lower plastic part is provided with a lower groove, and the bottom of the top cover is provided with an upper groove. The lower groove and the upper groove are laterally misaligned and connected to form a misaligned groove. The misaligned groove is connected to the through hole, and the colloid extends to the misaligned groove and fills the misaligned groove.

[0012] Furthermore, the inner connecting section extends to form a bent section, the bent section being bent and arranged with the inner connecting section, and the bent section being fixedly built into the lower plastic part.

[0013] Furthermore, the connecting piece is a tab that is electrically connected to the battery cell.

[0014] Furthermore, the battery cell has tabs, and the inner connecting section is fixedly connected to the tabs so that the inner connecting section is electrically connected to the battery cell. Beneficial effects

[0015] Compared with the prior art, the electrodeless top cover assembly provided by the present invention eliminates the electrode posts and electrode blocks. The inner connecting section is electrically connected to the battery cell, and the outer connecting section is directly electrically connected to the busbar to meet the charging and discharging requirements, which greatly simplifies the structure and saves costs. The inner connecting section is fixedly connected to the lower plastic part, which makes the structure stable and can avoid the phenomenon of battery cell shaking caused by pulling.

[0016] The present invention also provides a method for assembling a terminal block top cover assembly, wherein the terminal block top cover assembly is the aforementioned terminal block top cover assembly, and the assembly method includes the following assembly steps:

[0017] 1) The connecting piece is fixedly connected to the lower plastic part, and the connecting piece passes through the lower plastic part and the top cover piece; the connecting piece has an inner connecting section, a through section and an outer connecting section that are electrically connected to the battery cell, the through section passes through the lower plastic part and the top cover piece, the inner connecting section is fixedly connected to the lower plastic part; the lower plastic part is fixedly connected to the bottom of the top cover piece, and the outer connecting section extends to the outside of the top cover piece;

[0018] 2) Seal the protruding section with the lower plastic part and the top cover plate by injecting colloid;

[0019] 3) An upper plastic part is arranged on the top of the top cover plate, the upper plastic part is fixedly connected to the top cover plate, and the through section passes through the upper plastic part;

[0020] 4) The outer connecting section is abutted against the upper plastic part, and the lower plastic part, top cover piece, connecting piece and upper plastic part are assembled to form a top cover assembly.

[0021] Compared with the prior art, the assembly method of the columnless top cover assembly provided by the present invention has the inner connecting section of the connecting piece electrically connected to the battery cell, the inner connecting section fixedly connected to the lower plastic part, the through section passing through the lower plastic part and the top cover piece and sealed with colloid, the lower plastic part and the top cover piece fixedly connected, and after the upper plastic part is connected to the top cover piece, the outer connecting section abuts against the upper plastic part. The whole assembly process is fast and convenient, simplifies the assembly difficulty and improves the assembly efficiency.

[0022] Secondly, the assembled top cover assembly eliminates the need for poles and pole blocks, and can be directly electrically connected to the busbar using the external connection section to meet the charging and discharging requirements, greatly simplifying the structure and saving costs.

[0023] In addition, the upper plastic part, top cover plate, lower plastic part and connecting plate form a fixed integrated structure. The top cover assembly has strong integrity and a stable structure, which can avoid the phenomenon of the battery cell shaking due to pulling.

[0024] The present invention also provides a battery comprising the aforementioned terminal block top cover assembly.

[0025] Compared with the prior art, the battery provided by the present invention greatly simplifies the battery structure and saves costs because the top cover assembly eliminates the terminals and electrode blocks. In addition, the battery cell is more stable and avoids the phenomenon of battery cell shaking.

[0026] The present invention also provides a battery pack comprising a plurality of the batteries, wherein the outer connecting sections of adjacent batteries overlap to electrically connect the adjacent batteries.

[0027] Compared with the prior art, the battery pack provided by the present invention directly uses external connecting sections to connect the batteries to achieve electrical connection. The connection is convenient, the structure is simple, and the method of connecting the batteries is more convenient. Attached Figure Description

[0028] Figure 1 is a partial schematic diagram of the electrodeless column top cover assembly provided by the present invention;

[0029] Figure 2 is a partial three-dimensional schematic diagram of the top cover sheet and the lower plastic part provided by the present invention;

[0030] Figure 3 is a partial schematic diagram of the fit between the through section, the lower plastic part and the top cover plate provided by the present invention;

[0031] Figure 4 is a three-dimensional schematic diagram of the connecting piece provided by the present invention;

[0032] Figure 5 is a partial three-dimensional schematic diagram of the connecting piece provided by the present invention;

[0033] Figure 6 is a partial schematic diagram of the fit between the through section, the lower plastic part and the top cover plate provided by the present invention;

[0034] Figure 7 is a partial perspective view of the battery pack provided by the present invention;

[0035] Figure 8 is a schematic diagram of the assembly process of the terminal block battery top cover provided by the present invention;

[0036] In the diagram: 100 battery cell; 200 lower plastic part, 202 lower groove, 203 protrusion; 300 top cover plate, 301 middle locking block, 302 upper groove, 303 upper slot, 305 protrusion, 306 inclined wall; 400 upper plastic part, 401 upper locking block; 500 connecting piece, 501 inner connecting section, 501 lower locking block, 502 bending section, 503 through section, 503 protrusion, 5031 recess, 5032 outer connecting section, 504 empty slot area, 5041 transition section, 5042; 600 colloid; 700 through hole; 800 fixing part; 900 battery, 901 transition area. The best embodiment of the present invention

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0038] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0039] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0040] Referring to Figures 1-8, a preferred embodiment of the present invention is provided.

[0041] The terminal block top cover assembly includes a connecting piece 500 electrically connected to the battery cell 100, a top cover piece 300, a lower plastic part 200 disposed at the bottom of the top cover piece 300, and an upper plastic part 400 disposed at the top of the top cover piece 300, such that the upper plastic part 400, the top cover piece 300, and the lower plastic part 200 are stacked and connected together.

[0042] The upper plastic part 400 is fixedly connected to the top cover plate 300, the top cover plate 300 is fixedly connected to the lower plastic part 200, the connecting piece 500 has an inner connecting section 501 electrically connected to the battery cell 100, the inner connecting section 501 is fixedly connected to the lower plastic part 200; the connecting piece 500 has an outer connecting section 504 electrically connected to the busbar, the outer connecting section 504 abuts against the upper plastic part 400.

[0043] In practical applications, the busbar can be connected to the external connection section 504, thereby achieving the purpose of electrically connecting the battery cell 100 to the busbar and realizing the charging and discharging effect of the battery 900.

[0044] The aforementioned poleless top cover assembly eliminates the need for poles and pole blocks. The inner connection section 501 is electrically connected to the battery cell 100, and the outer connection section 504 is directly connected to the busbar to meet the charging and discharging requirements, greatly simplifying the structure and saving costs. The inner connection section 501 is fixedly connected to the lower plastic part 200, ensuring a stable structure and preventing the battery cell 100 from shaking due to pulling.

[0045] In this embodiment, the lower plastic part 200 and the top cover piece 300 are fixedly connected by a snap-fit ​​structure, which eliminates the need for welding, greatly simplifying the assembly process and improving assembly efficiency.

[0046] The lower plastic part 200 has a central slot at its top and the top cover plate 300 has a central block 301 at its bottom. The central block 301 is embedded in the central slot to achieve a snap-fit ​​connection, thereby achieving a snap-fit ​​connection between the lower plastic part 200 and the top cover plate 300.

[0047] In this embodiment, the inner connecting section 501 and the lower plastic part 200 are fixedly connected by a snap-fit ​​structure. The connection is fixed by a snap-fit ​​structure, which eliminates the need for welding, greatly simplifies the assembly process and improves assembly efficiency.

[0048] The inner connecting section 501 has a protruding lower locking block 5011, and the bottom of the lower plastic part 200 has a lower locking groove. The lower locking block 5011 is embedded in the lower locking groove to achieve a locking connection, thereby realizing the locking connection between the inner connecting section 501 and the top cover piece 300.

[0049] During the assembly process, the lower plastic part 200 and the top cover plate 300 can be snapped together and fixedly connected first, then the inner connecting section 501 can be snapped together and fixedly connected to the lower plastic part 200, and then the through section 503 can be passed through the lower plastic part 200 and the top cover plate 300.

[0050] Alternatively, the inner connecting section 501 can be first engaged and fixedly connected with the lower plastic part 200, and then the lower plastic part 200 can be engaged and fixedly connected with the top cover plate 300 before the through section 503 passes through the lower plastic part 200 and the top cover plate 300.

[0051] In this embodiment, the upper plastic part 400 and the top cover plate 300 are engaged and fixedly connected. The top of the top cover plate 300 is provided with an upper slot 303, and the upper plastic part 400 is provided with an upper locking block 401. The upper locking block 401 is embedded in the upper slot 303 to fix the upper plastic part 400 and the top cover plate 300 together. In addition, the through section 503 also passes through the upper plastic part 400 and is fixedly connected to it.

[0052] In this embodiment, the connecting piece 500 has a through section 503 that passes through the lower plastic part 200 and the top cover piece 300 and is fixedly arranged. The through section 503 is sealed with the lower plastic part 200 and the top cover piece 300. That is, the through section 503 is sealed with the lower plastic part 200 and the top cover piece 300. The sealing can be achieved by using a sealing ring or by using an adhesive.

[0053] The through section 503 can pass through the lower plastic part 200 and the top cover plate 300, which makes it easier for the outer connecting section 504 to be arranged on the upper plastic part 400, and the connecting plate 500 is integrated with the lower plastic part 200 and the top cover plate 300, making the overall structure more stable.

[0054] In this embodiment, the lower plastic part 200 has a lower hole and the top cover plate 300 has an upper hole. After the lower plastic part 200 and the top cover plate 300 are fixedly connected, the lower hole and the upper hole are aligned and connected to form a through hole 700. The through section 503 passes through the through hole 700. The colloid 600 is injected into the through hole 700, and the colloid 600 fills the through hole 700. The through section 503 is fixedly arranged and sealed between the through section 503 and the lower plastic part 200 and the top cover plate 300.

[0055] After the lower plastic part 200 and the top cover plate 300 are fixedly connected, the upper hole and the lower hole are aligned vertically and connected to form a through hole 700. In this way, the through section 503 can pass through the lower plastic part 200 and the top cover plate 300, and the through hole 700 is filled with the glue 600. This not only fixes the through section 503 and integrates it with the lower plastic part 200 and the top cover plate 300 into a whole structure, but also seals the through section 503 with the lower plastic part 200 and the top cover plate 300.

[0056] In this embodiment, the through section 503 is provided with an outwardly protruding part 5031 and an inwardly recessed part 5032, and the colloid 600 covers the protruding part 5031 and the recessed part 5032.

[0057] By providing the protrusion 5031 and the recess 5032, the outer surface of the through section 503 forms an uneven structure, which can improve the tightness of the bond between the through section 503 and the colloid 600, making the position of the through section 503 more stable and fixed, and greatly enhancing the sealing performance. Alternatively, the through section 503 can also be arranged in a curved shape to increase the contact area of ​​the remaining colloid 600 and the curved connection path, thereby improving the tightness of the bond and enhancing the sealing performance.

[0058] In this embodiment, the diameters of the lower holes and the upper holes are different, so that the through holes 700 are arranged in a variable diameter manner, so that the colloid 600 can be placed more stably in the through holes 700, thereby improving the sealing performance.

[0059] The lower plastic part 200 protrudes towards the lower hole, forming a protrusion 203, which is covered by the colloid 600. By forming the protrusion 203, the bonding between the colloid 600 and the lower plastic part 200 and the top cover plate 300 is strengthened, ensuring that the through section 503 is firmly placed in the through hole 700 and enhancing the sealing performance.

[0060] In this embodiment, the top of the lower plastic part 200 is provided with a lower groove 202, and the bottom of the top cover plate 300 is provided with an upper groove 302. The lower groove 202 and the upper groove 302 are laterally misaligned and connected to form a misaligned groove. The misaligned groove is connected to the through hole. During the process of injecting the colloid 600 into the through hole, the colloid 600 overflows into the misaligned groove and fills the misaligned groove.

[0061] The colloid 600 overflows into the misaligned groove and fills the misaligned groove, further enhancing the stability of the connection between the lower plastic part 200 and the top cover plate 300, and further enhancing the sealing performance.

[0062] In this embodiment, the inner connecting segment 501 extends to form a bent segment 502, which is bent and arranged with the inner connecting segment 501 and is fixedly built into the lower plastic part 200. After the inner connecting segment 501 is snapped and fixedly connected to the lower plastic part 200, the bent segment 502 is fixedly built into the lower plastic part 200.

[0063] By arranging the bent section 502, the structural strength of the entire connecting piece 500 is enhanced, so that the connecting piece 500 and the lower plastic part 200 are fixedly connected as a stable whole. As a preferred embodiment, the bent section 502 and the inner connecting section 501 are arranged vertically at intervals, which facilitates the formation and arrangement of the bent section 502 and further enhances the structural stability of the connecting piece 500.

[0064] In this embodiment, the connecting piece 500 is a tab that is electrically connected to the battery cell 100. In this way, the tab is directly used to electrically connect to the battery cell 100 and to the busbar battery cell 100, which further simplifies the structure.

[0065] Alternatively, the battery cell has tabs, and the inner connecting section 501 is fixedly connected to the tabs, so that the inner connecting section 501 is electrically connected to the battery cell 100. The connecting piece 500, as an independent component, is formed in the lower plastic part 200, the top cover piece 300, and the upper plastic part 400. It is connected to the tabs on the battery cell 100 and can be electrically connected to the busbar, thus achieving the effect of electrically connecting the battery cell 100 to the busbar.

[0066] In this embodiment, the external connection part is provided with a fuse part. When the current through the fuse part is greater than a set value, the fuse part melts. The fuse part is provided with an insulating fixing member 800. When the fuse part melts, the fixing member 800 fixes the fuse part, preventing the external connection part from making secondary contact with external electrical components and preventing secondary damage to the battery 900.

[0067] Specifically, the fusible link has a through-hole area 5041, which reduces the size of the fusible link to allow it to fuse. The fixing member 800 is a colloid 600 supported by a colloid 600. The colloid 600 is placed on the fusible link and fills the through-hole area 5041, and is connected to the external connecting part. In this way, when the fusible link melts, the colloid 600 can fix the fusible link.

[0068] Referring to FIG6, as another embodiment, a protrusion 305 is formed on the top cover 300. The protrusion 305 passes through the upper plastic part 400 and abuts and seals with the upper plastic part 400, or directly abuts; the upper hole extends upward through the protrusion 305, so that the through section 503 passes through the lower hole of the lower plastic part 200 and through the upper hole of the top cover 300, that is, it is inserted in the protrusion 305, and the outer connecting section 504 extends on the upper plastic part 400.

[0069] The glue 600 is injected into the through hole 700 formed by the upper hole and the lower hole, and also fills the interior of the protrusion 305. Of course, resin can also be used to fill the through hole 700, or a sealing ring can be placed directly in the through hole 700, etc. As long as the through section 503 can be sealed with the lower plastic part 200, and the through section 503 can be sealed with the top cover plate 300, the specific sealing material is not limited.

[0070] The inclined wall 306 formed on the outer side of the protrusion 305 is arranged inwardly along the direction from bottom to top of the top cover 300. The inclined wall 306 passes through the upper plastic part 400, and the upper plastic part 400 abuts against the inclined wall 306, which can achieve a tight abutting fit between the upper plastic part 400 and the protrusion 305, and facilitate the protrusion 305 to pass through the upper plastic part 400.

[0071] This embodiment also provides a method for assembling the endless column top cover assembly, including the following assembly steps:

[0072] 1) The connecting piece 500 is fixedly connected to the lower plastic part 200, and the connecting piece 500 passes through the lower plastic part 200 and the top cover piece 300; the connecting piece 500 has an inner connecting section 501, a through section 503 and an outer connecting section 504 that are electrically connected to the battery cell 100, the through section 503 passes through the lower plastic part 200 and the top cover piece 300, the inner connecting section 501 is fixedly connected to the lower plastic part 200; the lower plastic part 200 is fixedly connected to the bottom of the top cover piece 300, and the outer connecting section 504 extends to the outside of the top cover piece 300;

[0073] 2) By injecting colloid 600, the through section 503 is sealed with the lower plastic part 200 and the top cover plate 300. In this way, the through section 503 can be fixed and arranged, and the sealed state can be maintained.

[0074] 3) An upper plastic part 400 is arranged on the top of the top cover plate 300. The upper plastic part 400 is fixedly connected to the top cover plate 300, and the through section 503 passes through the upper plastic part 400.

[0075] 4) The outer connecting section 504 is abutted against the upper plastic part 400, and the lower plastic part 200, the top cover piece 300, the connecting piece 500 and the upper plastic part 400 are assembled to form the top cover assembly.

[0076] The above-mentioned assembly method for the column-free top cover assembly involves an inner connecting section 501 of the connecting piece 500 being electrically connected to the battery cell 100, a fixed connection between the inner connecting section 501 and the lower plastic part 200, a through section 503 passing through the lower plastic part 200 and the top cover piece 300 and being sealed with adhesive 600, a fixed connection between the lower plastic part 200 and the top cover piece 300, and an upper plastic part 400 connected to the top cover piece 300, with the outer connecting section 504 abutting against the upper plastic part 400. The entire assembly process is quick and convenient, simplifies assembly difficulty, and improves assembly efficiency.

[0077] Secondly, the assembled top cover assembly eliminates the need for poles and pole blocks, and can be directly electrically connected to the busbar using the external connection section 504 to meet the charging and discharging requirements, greatly simplifying the structure and saving costs.

[0078] In addition, the upper plastic part 400, the top cover plate 300, the lower plastic part 200 and the connecting piece 500 form a fixed integrated structure. The top cover assembly has strong integrity and a stable structure, which can prevent the phenomenon of the battery cell 100 shaking due to pulling.

[0079] In this embodiment, in assembly step 1), when the connecting piece 500 is an electrode that is electrically connected to the battery cell 100, it can be directly connected to the battery cell 100 and the busbar battery cell 100, further simplifying the structure.

[0080] In assembly step 1), when the connecting piece 500 is an independent component, the battery cell 100 has tabs, and the inner connecting section 501 is fixedly connected to the tabs to make the inner connecting section 501 electrically connected to the battery cell 100. The connecting piece 500, as an independent component, is formed in the lower plastic part 200, the top cover piece 300, and the upper plastic part 400. It is connected to the tabs on the battery cell 100 and can be electrically connected to the busbar, thus achieving the effect of electrically connecting the battery cell 100 to the busbar.

[0081] This embodiment also provides a battery 900, including the aforementioned terminalless top cover assembly. Since the top cover assembly eliminates the terminals and electrode blocks, it greatly simplifies the structure of the battery 900, saves costs, and makes the battery cell 100 more stable, avoiding the phenomenon of the battery cell 100 shaking.

[0082] Referring to Figure 7, this embodiment also provides a battery pack, including the battery 900 described above. The outer connection segments 504 of adjacent batteries 900 overlap to make adjacent batteries 900 electrically connected. Of course, multiple batteries 900 can be connected in series or in parallel, not limited to specific connection methods.

[0083] The battery pack provided above directly uses the external connecting section 504 to connect the batteries 900, so as to realize the electrical connection between the batteries 900. The connection is convenient, the structure is simple, and the connection method between the batteries 900 is more convenient.

[0084] In this embodiment, a recessed transition region 901 is formed between the top cover plates 300 of adjacent batteries 900. The outer connecting section 504 crosses the transition region 901 and overlaps with the outer connecting section 504 of the adjacent battery 900. The outer connecting section 504 bends toward the transition region to form a downwardly recessed transition section 5042. The transition section 5042 is vertically aligned with the transition region 901 and can be embedded in the transition region 901. By forming the bent transition section 5042, the structural strength and stability of the outer connecting section 504 can be enhanced, preventing the movement of the connecting piece 500 from causing pulling and shaking of the cell 100. Furthermore, when the batteries 900 move or vibrate relative to each other, the force generated by the connecting piece 500 is reduced from being transmitted to the cell 100.

[0085] Specifically, the transition section 5042 can be arc-shaped, which facilitates its formation and further enhances the structural stability of the connecting piece 500. Secondly, adjacent outer connecting sections 504 are joined by a surface-fitting overlapping method to ensure a stable connection and a large contact area between adjacent outer connecting sections 504.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A column-free top cover assembly, characterized in that, The device includes a connecting piece electrically connected to the battery cell, a top cover piece, a lower plastic part disposed at the bottom of the top cover piece, and an upper plastic part disposed at the top of the top cover piece; the upper plastic part is fixedly connected to the top cover piece, the top cover piece is fixedly connected to the lower plastic part, the connecting piece has an inner connecting section electrically connected to the battery cell, the inner connecting section is fixedly connected to the lower plastic part; the connecting piece has an outer connecting section electrically connected to the busbar, the outer connecting section abutting against the upper plastic part.

2. The endless column top cover assembly as described in claim 1, characterized in that, The connecting piece has a through section that passes through the lower plastic part and the top cover piece and is fixedly arranged. The through section is sealed to the lower plastic part and to the top cover piece.

3. The endless column top cover assembly as described in claim 2, characterized in that, The top cover plate has an upper hole, and the lower plastic part has a lower hole. The upper hole and the lower hole are aligned and connected to form a through hole. The through section is inserted into the through hole, and the through hole is filled with colloid. The colloid wraps around the through section, fixes the through section, and seals the through section with the lower plastic part and the top cover plate.

4. The endless column top cover assembly as described in claim 3, characterized in that, The diameter of the upper hole is different from that of the lower hole, and the lower plastic part protrudes towards the lower hole to form a protrusion, which is covered by the colloid.

5. The endless column top cover assembly as described in claim 3, characterized in that, The through section is provided with an outwardly protruding part and an inwardly recessed part, and the colloid wraps around the protruding part and the recessed part.

6. The endless column top cover assembly as described in claim 3, characterized in that, The lower plastic part has a lower groove at the top and an upper groove at the bottom of the top cover. The lower groove and the upper groove are laterally offset and connected to form an offset groove. The offset groove is connected to the through hole, and the colloid extends to the offset groove and fills the offset groove.

7. The endless column top cover assembly as described in any one of claims 1 to 3, characterized in that, The inner connecting section extends to form a bent section, which is arranged in a bent manner with the inner connecting section, and the bent section is fixedly built into the lower plastic part.

8. The endless column top cover assembly as described in any one of claims 1 to 3, characterized in that, The connecting piece is a tab that is electrically connected to the battery cell.

9. The endless column top cover assembly as described in any one of claims 1 to 3, characterized in that, The battery cell has tabs, and the inner connecting section is fixedly connected to the tabs so that the inner connecting section is electrically connected to the battery cell.

10. A method for assembling a column-type top cover assembly, characterized in that, The endless column top cover assembly is the endless column top cover assembly according to any one of claims 1 to 9, and its assembly method includes the following assembly steps: 1) The connecting piece is fixedly connected to the lower plastic part, and the connecting piece passes through the lower plastic part and the top cover piece; the connecting piece has an inner connecting section, a through section and an outer connecting section that are electrically connected to the battery cell, the through section passes through the lower plastic part and the top cover piece, the inner connecting section is fixedly connected to the lower plastic part; the lower plastic part is fixedly connected to the bottom of the top cover piece, and the outer connecting section extends to the outside of the top cover piece; 2) Seal the protruding section with the lower plastic part and the top cover plate by injecting colloid; 3) An upper plastic part is arranged on the top of the top cover plate, the upper plastic part is fixedly connected to the top cover plate, and the through section passes through the upper plastic part; 4) The outer connecting section is abutted against the upper plastic part, and the lower plastic part, top cover piece, connecting piece and upper plastic part are assembled to form a top cover assembly.

11. A battery, characterized in that, Includes the endless column top cover assembly as described in any one of claims 1 to 9.

12. A battery pack, characterized in that, The battery includes multiple batteries as described in claim 11, wherein the outer connecting sections of adjacent batteries overlap to make the adjacent batteries electrically connected.

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