Top cover assembly, single battery and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and discloses a top cover assembly, a single battery and electric equipment. The top cover assembly comprises a cover plate body and a pole assembly, the size of the cover plate body in the first direction is larger than that of the cover plate body in the second direction, and the first direction is perpendicular to the second direction; wherein the cover plate body is provided with a pole mounting hole, the size of the pole mounting hole in the first direction is larger than that of the pole mounting hole in the second direction, a riveting turnup edge is arranged at a top port of the pole mounting hole in an upward protruding mode, and the riveting turnup edge is provided with a riveting part capable of stretching out towards the center position of the pole mounting hole; the pole assembly is installed in the pole installation hole in a matched mode, and the bottom wall of the riveting part abuts against the top wall of the pole assembly. According to the top cover assembly, the structure of the top cover assembly is simplified while the rapid charging and discharging functions of the single battery using the top cover assembly are realized, so that the manufacturing cost of the top cover assembly is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a top cover assembly, a single battery cell, and an electrical device. Background Technology

[0002] The cell cover and terminals of power batteries are generally injection-molded or riveted. However, to ensure the structural strength between the cover and the terminals, the plastic part of the injection-molded structure is designed to be larger. Riveted terminals, due to the uniformity of the riveting process, are often cylindrical. When these two cover structures are used in small-sized batteries, the current-carrying portion of the terminals is too small to meet the increasingly higher capacity and faster charging requirements of the cells.

[0003] Currently, battery capacities are increasing, and charging and discharging speeds are also accelerating. This places increasingly stringent requirements on the current carrying capacity of the battery cover's terminals. The size of the terminals directly affects the current carrying capacity; specifically, a larger terminal area results in less heat generation even with increased current carrying capacity, while a smaller area leads to more heat generation. Increased heat generation at the battery terminals can negatively impact battery performance and even safety. Wider cover plates facilitate the installation of large circular or other shaped terminals. However, with narrower cover plates, increasing the terminal area necessitates a long, narrow shape. This requires larger riveting blocks to secure the cell cover and terminals, increasing the manufacturing cost of the battery cell.

[0004] Therefore, there is an urgent need to provide a new type of top cover assembly, single battery cell, and electrical device to solve the aforementioned technical problems in the prior art. Utility Model Content

[0005] The purpose of this utility model is to provide a top cover assembly that enables fast charging and discharging of the elongated cover body, while having the advantages of simple structure and low manufacturing cost.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The top cover assembly includes a cover plate body and a pole post assembly. The cover plate body has a dimension along a first direction that is larger than its dimension along a second direction, and the first direction is perpendicular to the second direction. The cover plate body is provided with a pole post mounting hole, and the dimension of the pole post mounting hole along the first direction is larger than its dimension along the second direction. The top port of the pole post mounting hole has a riveting flange protruding upward, and the riveting flange has a riveting portion that can extend toward the center of the pole post mounting hole. The pole post assembly is fitted into the pole post mounting hole, and the bottom wall of the riveting portion abuts against the top wall of the pole post assembly.

[0008] Optionally, a fixed step is provided at the bottom port of the aforementioned pole mounting hole facing the center of the aforementioned pole mounting hole, and at least a portion of the aforementioned pole assembly is sandwiched between the aforementioned riveting part and the aforementioned fixed step.

[0009] Optionally, the circumferential outer wall of the above-mentioned pole assembly is provided with an annular fixing boss, which is sandwiched between the above-mentioned riveting part and the above-mentioned fixing step.

[0010] Optionally, an upper plastic part is sandwiched between the aforementioned electrode assembly and the aforementioned electrode mounting hole.

[0011] Optionally, the aforementioned upper plastic part includes a first part, a second part, a third part, and a fourth part integrally formed from top to bottom. The first part is sandwiched between the circumferential inner wall of the aforementioned riveting part and the circumferential outer wall of the aforementioned pole assembly. The second part is sandwiched between the bottom wall of the aforementioned riveting part and the top wall of the aforementioned annular fixing boss. The third part is sandwiched between the circumferential inner wall of the aforementioned pole mounting hole and the circumferential outer wall of the aforementioned annular fixing boss. The fourth part is sandwiched between the bottom wall of the aforementioned annular fixing boss and the top wall of the aforementioned fixing step.

[0012] Optionally, a sealing ring is further provided between the pole assembly and the fixed step. The sealing ring includes an integrally formed first sealing part and a second sealing part. The first sealing part is sandwiched between the bottom wall of the annular fixed boss and the top wall of the fixed step, and the second sealing part is sandwiched between the circumferential outer wall of the pole assembly and the circumferential inner wall of the fixed step.

[0013] Optionally, the aforementioned riveting flange is provided at the top port of the aforementioned pole mounting hole, and the aforementioned riveting portion is provided in multiple circumferentially spaced.

[0014] Optionally, a lower plastic part is provided at the bottom of the cover plate body, and the lower plastic part has a clearance hole for avoiding the pole assembly.

[0015] Another objective of this invention is to provide a single-cell battery, which includes the top cover assembly described in any of the above embodiments.

[0016] Another objective of this invention is to provide an electrical device comprising a single battery as described above.

[0017] Beneficial effects:

[0018] The top cover assembly of this invention has a cover plate body whose dimension along the first direction is larger than that along the second direction, making the top cover assembly a long strip-shaped cover plate. The terminal post assembly is installed through the terminal post mounting holes formed in the cover plate body. When fixing the terminal post assembly, a riveting flange protrudes upwards from the top end of the terminal post mounting hole. The top of the riveting flange has a riveting part facing the center of the terminal post mounting hole, which abuts against the top wall of the terminal post assembly, thus fixing the terminal post assembly. This top cover assembly eliminates the need for additional riveting blocks to rivet and fix the terminal post assembly in the terminal post mounting hole; the terminal post assembly is fixed simply by the riveting part at the top of the terminal post mounting hole abutting against the terminal post assembly. This allows for a larger terminal post assembly size, enabling fast charging and discharging of the single battery using this top cover assembly while simplifying the structure of the top cover assembly and reducing its manufacturing cost. Attached Figure Description

[0019] Figure 1 This is an isometric view of the top cover assembly provided in a specific embodiment of this utility model;

[0020] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 3 This is a partially enlarged view of the longitudinal section of the top cover assembly provided in a specific embodiment of this utility model.

[0022] In the picture:

[0023] 100. Cover plate body; 110. Pole post mounting hole; 120. Riveting flange; 130. Riveting part; 140. Fixing step; 200. Pole post assembly; 210. Annular fixing boss; 220. Upper plastic part; 221. First part; 222. Second part; 223. Third part; 224. Fourth part; 230. Sealing ring; 231. First sealing part; 232. Second sealing part; 300. Lower plastic part; 310. Clearance hole. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0028] like Figure 1 As shown, the first direction described in this embodiment is Figure 1 The X direction shown is the length direction of the cover plate body 100, and the second direction is... Figure 1 The Y direction shown is the width direction of the cover body 100, and the first direction is perpendicular to the second direction.

[0029] like Figure 1 and Figure 2As shown, the top cover assembly includes a cover plate body 100 and a pole post assembly 200. The cover plate body 100 has a dimension along a first direction that is larger than its dimension along a second direction, and the first direction is perpendicular to the second direction. The cover plate body 100 is provided with a pole post mounting hole 110, and the dimension of the pole post mounting hole 110 along the first direction is larger than its dimension along the second direction. The top port of the pole post mounting hole 110 is provided with a riveting flange 120 protruding upward, and the riveting flange 120 has a riveting portion 130 that can extend toward the center position of the pole post mounting hole 110. The pole post assembly 200 is fitted into the pole post mounting hole 110, and the bottom wall of the riveting portion 130 abuts against the top wall of the pole post assembly 200.

[0030] In this embodiment, the size of the cover plate body 100 along the first direction is larger than the size of the cover plate body 100 along the second direction, making the top cover assembly a long strip cover plate. The pole post assembly 200 is installed through the pole post mounting hole 110 opened in the cover plate body 100. When fixing the pole post assembly 200, a riveting flange 120 is provided on the top port of the pole post mounting hole 110. The top of the riveting flange 120 is provided with a riveting part 130 facing the center position of the pole post mounting hole 110. The riveting part 130 abuts against the top wall of the pole post assembly 200 to fix the pole post assembly 200. This top cover assembly eliminates the need for additional rivet blocks to rivet and fix the terminal assembly 200 within the terminal mounting hole 110. The terminal assembly 200 can be fixed simply by using the rivet part 130 at the top of the terminal mounting hole 110 to abut against the terminal assembly 200. This allows for a larger size of the terminal assembly 200, thereby enabling fast charging and discharging of individual batteries using this top cover assembly while simplifying the structure of the top cover assembly and reducing its manufacturing cost.

[0031] like Figure 2 and Figure 3 As shown, the aforementioned riveting flange 120 is circumferentially disposed at the top port of the aforementioned pole mounting hole 110, and multiple riveting portions 130 are provided at intervals along the circumference. It should be noted that the aforementioned riveting portions 130 are constructed by cutting notches into the riveting flange 120, and then fixing the remaining portion after cutting to the top of the pole assembly 200 by riveting. In this embodiment, four riveting portions 130 are provided. By setting them at intervals (i.e., cutting notches), wrinkles can be avoided in the riveting flange 120 during subsequent riveting assembly of the top cover assembly, thus avoiding affecting the airtightness of the top cover assembly.

[0032] Furthermore, a lower plastic component 300 is provided at the bottom of the cover plate body 100, and the lower plastic component 300 has a clearance hole 310 for avoiding the electrode assembly 200. The lower plastic component 300 is used to insulate the internal electrode of the single cell from the cover plate body 100, avoid short circuits in the single cell, and improve the safety and reliability of use.

[0033] like Figure 3 As shown, a fixing step 140 protrudes from the bottom port of the aforementioned pole mounting hole 110 toward the center of the pole mounting hole 110, and at least a portion of the aforementioned pole assembly 200 is sandwiched between the aforementioned riveting portion 130 and the aforementioned fixing step 140. Through the fixing step 140 at the bottom of the pole mounting hole 110 and the riveting portion 130 at the top, the interface snaps and fixes at least a portion of the structure of the pole assembly 200, thereby achieving stable fixation of the pole assembly 200 by the pole mounting hole 110.

[0034] In this embodiment, the circumferential outer wall of the aforementioned pole assembly 200 is provided with an annular fixing boss 210, which is sandwiched between the aforementioned riveting portion 130 and the aforementioned fixing step 140. The annular fixing boss 210 can cooperate with the aforementioned riveting portion 130 and fixing step 140, further improving the stable connection between the pole assembly 200 and the pole mounting hole 110, which will not be described in detail here.

[0035] Optionally, an upper plastic part 220 is sandwiched between the terminal assembly 200 and the terminal mounting hole 110. The upper plastic part 220 is used to insulate and seal the terminal assembly 200 and the terminal mounting hole 110, preventing electrolyte leakage. It also serves as an insulator to prevent short circuits between the terminal assembly 200 and the cover plate body 100, thereby improving the safety and reliability of the single battery using this top cover assembly.

[0036] Furthermore, the aforementioned upper plastic part 220 includes a first part 221, a second part 222, a third part 223, and a fourth part 224 integrally formed from top to bottom. The first part 221 is sandwiched between the circumferential inner wall of the riveting part 130 and the circumferential outer wall of the pole post assembly 200. The second part 222 is sandwiched between the bottom wall of the riveting part 130 and the top wall of the annular fixing boss 210. The third part 223 is sandwiched between the circumferential inner wall of the pole post mounting hole 110 and the circumferential outer wall of the annular fixing boss 210. The fourth part 224 is sandwiched between the bottom wall of the annular fixing boss 210 and the top wall of the fixing step 140. By setting the upper plastic part 220 as a first part 221, a second part 222, a third part 223 and a fourth part 224, four seals and insulations can be achieved between the pole post assembly 200 and the pole post mounting hole 110, further improving the sealing and insulation performance.

[0037] In this embodiment, a sealing ring 230 is further sandwiched between the terminal post assembly 200 and the fixed step 140. The sealing ring 230 includes an integrally formed first sealing part 231 and a second sealing part 232. The first sealing part 231 is sandwiched between the bottom wall of the annular fixed boss 210 and the top wall of the fixed step 140, and the second sealing part 232 is sandwiched between the circumferential outer wall of the terminal post assembly 200 and the circumferential inner wall of the fixed step 140. The sealing ring 230 can achieve insulation and isolation between the fixed step 140 and the terminal post assembly 200, avoid short circuit between the terminal post assembly 200 and the cover plate body 100, and prevent electrolyte leakage from the terminal post mounting hole 110, further improving the safety and reliability of the top cover assembly and the single battery using the top cover assembly.

[0038] This embodiment also provides a single battery cell, which includes the top cover assembly described in any of the above-described solutions. Specifically, the single battery cell can be a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid (or lead-acid) battery, a lithium-ion battery, a polymer lithium-ion battery, etc. The single battery cell can also be a primary lithium-ion battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., which will not be elaborated further here. This single battery cell has the beneficial effects of the top cover assembly described in any of the above-described solutions, which will not be elaborated further here.

[0039] Specifically, when the above-mentioned top cover assembly is used in this single battery, the terminal assembly 200 can be riveted and fixed in the terminal mounting hole 110 without the need for additional riveting blocks. The terminal assembly 200 can be fixed by using the riveting part 130 at the top of the terminal mounting hole 110 to abut against the terminal assembly 200. This allows the terminal assembly 200 to be made larger, thereby achieving the function of fast charging and discharging of the single battery while simplifying the structure of the top cover assembly and reducing the manufacturing cost of the single battery.

[0040] This embodiment also provides an electrical device, which includes a single battery as described in the above scheme. Specifically, this electrical device can be an electric bicycle, an electric vehicle, a hybrid vehicle, a ship, an energy storage device, etc., as long as it uses electrical energy as its energy source; further details are omitted here.

[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A top cover assembly, characterized in that, include: A cover plate body (100) has a dimension along a first direction that is larger than the dimension along a second direction, the first direction being perpendicular to the second direction; wherein, the cover plate body (100) is provided with a pole mounting hole (110), the dimension of the pole mounting hole (110) along the first direction being larger than the dimension of the pole mounting hole (110) along the second direction, and a riveting flange (120) protruding upward from the top port of the pole mounting hole (110), the riveting flange (120) having a riveting portion (130) that can extend toward the center position of the pole mounting hole (110); The pole assembly (200) is fitted into the pole mounting hole (110), and the bottom wall of the riveting part (130) abuts against the top wall of the pole assembly (200).

2. The top cover assembly according to claim 1, characterized in that, The bottom port of the pole mounting hole (110) is provided with a fixed step (140) protruding towards the center of the pole mounting hole (110), and at least part of the pole assembly (200) is sandwiched between the riveting part (130) and the fixed step (140).

3. The top cover assembly according to claim 2, characterized in that, The outer circumferential wall of the pole assembly (200) is provided with an annular fixing boss (210), which is sandwiched between the riveting part (130) and the fixing step (140).

4. The top cover assembly according to claim 3, characterized in that, An upper plastic part (220) is sandwiched between the pole assembly (200) and the pole mounting hole (110).

5. The top cover assembly according to claim 4, characterized in that, The upper plastic part (220) includes a first part (221), a second part (222), a third part (223), and a fourth part (224) integrally formed from top to bottom. The first part (221) is sandwiched between the inner circumferential wall of the riveting part (130) and the outer circumferential wall of the pole post assembly (200). The second part (222) is sandwiched between the bottom wall of the riveting part (130) and the top wall of the annular fixing boss (210). The third part (223) is sandwiched between the inner circumferential wall of the pole post mounting hole (110) and the outer circumferential wall of the annular fixing boss (210). The fourth part (224) is sandwiched between the bottom wall of the annular fixing boss (210) and the top wall of the fixing step (140).

6. The top cover assembly according to claim 5, characterized in that, A sealing ring (230) is also provided between the pole post assembly (200) and the fixed step (140). The sealing ring (230) includes an integrally formed first sealing part (231) and a second sealing part (232). The first sealing part (231) is sandwiched between the bottom wall of the annular fixed boss (210) and the top wall of the fixed step (140). The second sealing part (232) is sandwiched between the circumferential outer wall of the pole post assembly (200) and the circumferential inner wall of the fixed step (140).

7. The top cover assembly according to any one of claims 1-6, characterized in that, The riveting flange (120) is circumferentially disposed at the top port of the pole mounting hole (110), and the riveting part (130) is provided in multiple circumferentially spaced.

8. The top cover assembly according to any one of claims 1-6, characterized in that, The bottom of the cover plate body (100) is provided with a lower plastic part (300), and the lower plastic part (300) has a clearance hole (310) for avoiding the pole post assembly (200).

9. A single-cell battery, characterized in that, Includes the top cover assembly as described in any one of claims 1-8.

10. Electrical equipment, characterized in that, Includes the single-cell battery as described in claim 9.

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