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 top cover body, a battery pole, a lower insulating part and an insulating sheet, wherein the top cover body is provided with a pole mounting hole; the battery pole comprises a mounting part and a connecting part which are integrally formed from top to bottom, the mounting part is inserted into the pole mounting hole, and a lower sealing piece is clamped between the connecting part and the bottom wall of the top cover body; the lower insulating part abuts against the bottom wall of the top cover body, at least part of the lower insulating part is clamped between the connecting part and the bottom wall of the top cover body, and the lower sealing part is installed in a clamping hole of the lower insulating part; and the insulating sheet is clamped between the connecting part and the lower sealing piece and correspondingly covers the connecting part of the lower sealing piece and the lower insulating piece. According to the top cover assembly, the high-temperature resistance of the top cover assembly can be improved at low cost, the insulating property of the top cover assembly is improved, and the use safety and reliability of the top cover assembly are improved.

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 battery casing is an essential component of a cylindrical battery. It houses the battery's cell pack assembly and terminal assembly. The terminal assembly is used to connect with electronic components, sensors, or connectors to enable the cylindrical battery's external discharge function. At the same time, the terminal assembly and the battery casing are usually insulated from each other by a lower plastic part to prevent short circuits and other unsafe phenomena in the cylindrical battery.

[0003] As cylindrical batteries are developing towards higher energy density and higher charge / discharge power, the short-term current intensity of the terminal components is high, and the usage frequency is frequent. Therefore, the terminal components generate a significant amount of heat. Thus, while ensuring good insulation between the terminal components and the battery casing, the battery cover, terminal components, and lower plastic parts must also possess certain high-temperature resistance and aging resistance. Existing lower plastic parts can only guarantee stable insulation performance below 300℃. Above 300℃, the insulation performance of the lower plastic parts decreases significantly, and at certain temperatures, the lower plastic parts may even melt, resulting in poor insulation or even short circuits. Furthermore, because there is a gap between the lower plastic parts and the insulating components of the terminal components, high-voltage overcurrents can occur in this gap during high-power charge / discharge, posing a potential risk of short circuits to the cylindrical battery.

[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 invention is to provide a top cover assembly that can improve its high temperature resistance at low cost and improve its insulation performance, thereby enhancing the safety and reliability of the top cover assembly.

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

[0007] The top cover assembly includes a top cover body, battery terminals, a lower insulator, and an insulating sheet. The top cover body has a terminal mounting hole. The battery terminal includes a mounting portion and a connecting portion integrally formed from top to bottom. The mounting portion is inserted into the terminal mounting hole. A lower sealing member is sandwiched between the connecting portion and the bottom wall of the top cover body. The lower insulator abuts against the bottom wall of the top cover body. At least a portion of the lower insulator is sandwiched between the connecting portion and the bottom wall of the top cover body. The lower sealing member is installed in a snap-fit ​​hole in the lower insulator. The insulating sheet is sandwiched between the connecting portion and the lower sealing member and correspondingly covers the connection between the lower sealing member and the lower insulator.

[0008] Optionally, a receiving groove is provided at the connection between the bottom wall of the lower sealing member and the bottom wall of the lower insulating member, and / or a receiving groove is provided on the top wall of the connection portion, and the receiving groove is filled with the insulating sheet.

[0009] Optionally, the insulating sheet includes an adsorption frame and an aerogel, the top wall of the connecting portion is provided with the receiving groove, the adsorption frame is disposed in the receiving groove, and the aerogel fills the gap between the receiving groove and the adsorption frame.

[0010] Optionally, the aforementioned adsorption frame includes any one of fiber strips, porous ceramic profiles, foam plastics, and porous glass.

[0011] Optionally, the high temperature resistance of the insulating sheet is not less than that of the lower seal, and the thermal insulation performance of the insulating sheet is not less than that of the lower seal.

[0012] Optionally, the connection between the top wall of the insulating sheet and the bottom wall of the lower seal and the bottom wall of the lower insulating member is interference-fitted.

[0013] Optionally, the top of the mounting portion further includes a crimping portion, and an upper insulating member is sandwiched between the crimping portion and the top wall of the top cover body.

[0014] Optionally, the above-mentioned upper insulating member further includes an insulating portion sandwiched between the above-mentioned mounting portion and the above-mentioned pole mounting hole.

[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 comprises a top cover body, battery terminals, a lower insulator, and an insulating sheet. The battery terminals are installed in the terminal mounting holes of the top cover body, with the mounting portion of the terminals passing through the terminals mounting holes. A lower sealing member is sandwiched between the connecting portion of the terminals and the top cover body. The lower insulator abuts against the bottom wall of the top cover body, and the lower sealing member is installed in the snap-fit ​​hole of the lower insulator. This creates a gap between the lower insulator and the lower sealing member, posing a risk of short circuit breakdown between the terminals of a single battery cell and the cover body. Therefore, an insulating sheet is provided at the connection between the lower insulator and the lower sealing member. The insulating sheet is sandwiched between the connecting portion and the lower sealing member, improving the sealing and insulation performance at the connection. Even if the lower insulator or the lower sealing member fails or deforms under high-temperature conditions, the insulating sheet can still ensure the insulation and sealing performance at the connection. This top cover assembly can improve its high-temperature resistance at low cost and enhance its insulation performance, thereby improving the safety and reliability of the battery cover. Attached Figure Description

[0019] Figure 1 This is an isometric view of the casing of a single battery cell provided in a specific embodiment of this utility model;

[0020] Figure 2 This is a longitudinal cross-sectional view of the single battery casing provided in a specific embodiment of this utility model;

[0021] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0022] In the picture:

[0023] 100. Top cover body; 110. Terminal mounting hole; 200. Battery terminal; 210. Mounting part; 220. Connecting part; 221. Receiving groove; 230. Pressing part; 240. Lower seal; 300. Lower insulation part; 310. Snap-fit ​​hole; 400. Insulating sheet; 500. Battery casing; 600. Upper insulation part; 610. Insulation part. 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 Figures 1 to 3 As shown, in this embodiment, the top cover assembly includes a top cover body 100, a battery terminal post 200, a lower insulating member 300, and an insulating sheet 400. The top cover body 100 has a terminal post mounting hole 110. The battery terminal post 200 includes a mounting portion 210 and a connecting portion 220 integrally formed from top to bottom. The mounting portion 210 is inserted into the terminal post mounting hole 110, and a lower sealing member 240 is sandwiched between the connecting portion 220 and the bottom wall of the top cover body 100. The lower insulating member 300 abuts against the bottom wall of the top cover body 100, and at least a portion of the lower insulating member 300 is sandwiched between the connecting portion 220 and the bottom wall of the top cover body 100. The lower sealing member 240 is installed in the snap-fit ​​hole 310 of the lower insulating member 300. The insulating sheet 400 is sandwiched between the connecting portion 220 and the lower sealing member 240, and correspondingly covers the connection between the lower sealing member 240 and the lower insulating member 300.

[0029] In this embodiment, the top cover assembly consists of a top cover body 100, battery terminals 200, a lower insulator 300, and an insulating sheet 400. The battery terminals 200 are installed in the terminal mounting holes 110 of the top cover body 100, and the mounting portion 210 of the terminals passes through the terminal mounting holes 110. A lower sealing member 240 is sandwiched between the connecting portion 220 of the terminals and the top cover body 100. The lower insulator 300 abuts against the bottom wall of the top cover body 100, and the lower sealing member 240 is installed in the snap-fit ​​hole 310 of the lower insulator 300. Thus, the lower insulator 300 and the lower sealing member... Gaps exist between the 240 components, posing a risk of short circuit breakdown between the terminal posts of individual cells and the cover plate body. Therefore, an insulating sheet 400 is provided at the connection between the lower insulating component 300 and the lower sealing component 240. The insulating sheet 400 is sandwiched between the connection portion 220 and the lower sealing component 240, improving the sealing and insulation performance at the connection between the lower insulating component 300 and the lower sealing component 240. Even if the lower insulating component 300 or the lower sealing component 240 fails or deforms under high-temperature conditions, the insulating sheet 400 can still ensure the insulation and sealing performance at the connection. This top cover assembly can improve its high-temperature resistance at low cost, and its insulation performance is improved, thus enhancing the safety and reliability of the battery cover.

[0030] like Figure 1 and Figure 2 As shown, the top cover body 100 of the single battery is installed at the top opening of the battery housing 500; furthermore, the top cover body 100 and the battery housing 500 are integrally formed to constitute the outer shell of the single battery, which is a cylindrical battery, and will not be described in detail here.

[0031] Please continue to refer to this. Figure 3 A receiving groove 221 is provided at the connection between the bottom wall of the lower sealing member 240 and the bottom wall of the lower insulating member 300, and / or a receiving groove 221 is provided on the top wall of the connecting part 220. The receiving groove 221 is filled with the insulating sheet 400. The receiving groove 221 can limit and fix the insulating sheet 400, prevent the insulating sheet 400 from loosening or shifting, and ensure that the insulating sheet 400 is always aligned with the connection between the lower insulating member 300 and the lower sealing member 240, thereby further improving the insulation and sealing performance.

[0032] In this embodiment, the insulating sheet 400 includes an adsorption frame and aerogel. The top wall of the connecting portion 220 has a receiving groove 221, within which the adsorption frame is disposed. The aerogel fills the gap between the receiving groove 221 and the adsorption frame. It should be noted that when manufacturing the insulating sheet 400, the receiving groove 221 is first formed on the top wall of the connecting portion 220. Then, porous material is placed in the receiving groove 221, followed by the injection of aerogel. After curing, the insulating sheet 400 is formed. This method of forming the insulating sheet 400 provides excellent heat insulation and high-temperature resistance to burn-through, and can prevent breakdown by thermal runaway high-temperature ejected materials, providing better protection for individual batteries and battery packs.

[0033] In this embodiment, the adsorption frame includes any one of fiber cotton strips, porous ceramic profiles, foam plastics, and porous glass. Furthermore, the adsorption frame in this embodiment is a special fiber cotton and porous ceramic material, using a proprietary formula with full-gradient compounding technology, thereby achieving higher high-temperature resistance, insulation, and sealing performance; details will not be elaborated further here.

[0034] Furthermore, the top wall of the insulating sheet 400 is interference-fitted with the bottom walls of the lower seal 240 and the lower insulating member 300. This allows the insulating sheet 400 to be compressed, thereby applying pressure to the bottom walls of the lower seal 240 and the lower insulating member 300, further improving the sealing effect.

[0035] In this embodiment, the top wall of the insulating sheet 400 is 0.1 mm higher than the top wall of the connecting part 220. After the lower insulating part 300 and the lower sealing part 240 melt at high temperature, the connecting part 220 will not come into contact with the top cover body 100, which further improves safety and reliability.

[0036] Please continue to refer to this. Figure 3 The high-temperature resistance of the insulating sheet 400 is no less than that of the lower sealing member 240, and the thermal insulation performance of the insulating sheet 400 is no less than that of the lower sealing member 240. With this configuration, even if the lower insulating member 300 and the lower sealing member 240 melt at high temperatures, the insulating sheet 400 can still maintain structural integrity, and the connection portion 220 can always be separated from the top cover body 100, further improving safety and reliability. Furthermore, during high-power charging and discharging, the high-temperature fumes or liquids generated during thermal runaway of a single battery cell will not affect the insulating sheet 400.

[0037] In this embodiment, the top of the mounting portion 210 further includes a crimping portion 230, and an upper insulating member 600 is sandwiched between the crimping portion 230 and the top wall of the top cover body 100. Thus, the upper insulating member 600 can achieve insulation between the crimping portion 230 of the battery terminal 200 and the top wall of the top cover body 100, further improving the insulation performance between the battery terminal 200 and the top cover body 100, which will not be elaborated further here.

[0038] Optionally, the upper insulating member 600 further includes an insulating portion 610 sandwiched between the mounting portion 210 and the terminal mounting hole 110. The insulating portion 610 can achieve insulation and isolation between the mounting portion 210 and the terminal mounting hole 110, preventing short circuits between the battery terminal 200 and the cover plate body, and also preventing electrolyte leakage from the terminal mounting hole 110, further improving the safety and reliability of the top cover assembly and the individual battery cells using the top cover assembly.

[0039] It should be noted that the bottom wall of the aforementioned insulating part 610 abuts against the top wall of the aforementioned lower sealing member 240. Thus, the upper insulating member 600, the insulating part 610, the lower sealing member 240, and the lower insulating member 300 can form a complete covering surface, which can cover the upper and lower surfaces of the terminal mounting hole 110 and the top cover body 100 surrounding the terminal mounting hole 110, improving the insulation performance between the battery terminal 200 and the top cover body 100, which will not be elaborated further here.

[0040] 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.

[0041] Specifically, when the above-mentioned top cover assembly is used in this single cell, the sealing and insulation performance at the connection between the lower insulator 300 and the lower seal 240 can be improved. Even if the lower insulator 300 or the lower seal 240 fails or deforms under high temperature conditions, the insulating sheet 400 can still ensure the insulation and sealing performance at the connection, thereby improving the safety and reliability of the single cell.

[0042] 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.

[0043] 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: The top cover body (100) has a pole mounting hole (110); A battery terminal (200) includes an integrally formed mounting part (210) and a connecting part (220) from top to bottom. The mounting part (210) is inserted into the terminal mounting hole (110), and a lower sealing member (240) is sandwiched between the connecting part (220) and the bottom wall of the top cover body (100). The lower insulating member (300) abuts against the bottom wall of the top cover body (100), and at least a portion of the lower insulating member (300) is sandwiched between the connecting part (220) and the bottom wall of the top cover body (100). The lower sealing member (240) is installed in the snap-fit ​​hole (310) of the lower insulating member (300). An insulating sheet (400) is sandwiched between the connecting portion (220) and the lower sealing member (240), and correspondingly covers the connection between the lower sealing member (240) and the lower insulating member (300).

2. The top cover assembly according to claim 1, characterized in that, A receiving groove (221) is provided at the connection between the bottom wall of the lower sealing member (240) and the bottom wall of the lower insulating member (300), and / or a receiving groove (221) is provided on the top wall of the connecting part (220), and the receiving groove (221) is filled with the insulating sheet (400).

3. The top cover assembly according to claim 2, characterized in that, The insulating sheet (400) includes an adsorption frame and an aerogel. The top wall of the connecting part (220) is provided with the receiving groove (221). The adsorption frame is disposed in the receiving groove (221). The aerogel fills the gap between the receiving groove (221) and the adsorption frame.

4. The top cover assembly according to claim 3, characterized in that, The adsorption frame includes any one of fiber strips, porous ceramic profiles, foam plastics, and porous glass.

5. The top cover assembly according to claim 4, characterized in that, The high temperature resistance of the insulating sheet (400) is not less than that of the lower seal (240), and the heat insulation performance of the insulating sheet (400) is not less than that of the lower seal (240).

6. The top cover assembly according to claim 3, characterized in that, The top wall of the insulating sheet (400) is interference-fitted with the bottom wall of the lower seal (240) and the bottom wall of the lower insulating member (300).

7. The top cover assembly according to claim 1, characterized in that, The top of the mounting part (210) also includes a crimping part (230), and an upper insulating member (600) is sandwiched between the crimping part (230) and the top wall of the top cover body (100).

8. The top cover assembly according to claim 7, characterized in that, The upper insulating member (600) further includes an insulating portion (610) sandwiched between the mounting portion (210) and the pole mounting hole (110).

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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