Cover plate assembly, battery and electronic equipment

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate assembly, a battery and electronic equipment. The cover plate assembly comprises a cover plate body, a pole terminal, an insulating sealing ring and a temperature-resistant piece, wherein the cover plate body is provided with a mounting hole; the pole terminal is inserted into the mounting hole, and a connecting part exceeding the mounting hole in the radial direction is arranged at the top of the pole terminal; the insulation sealing ring is annular, the insulation sealing ring comprises a first part and a second part which are perpendicular to each other, the bottom wall of the first part abuts against the top wall of the cover plate body, and the second part is clamped between the circumferential inner wall of the mounting hole and the circumferential outer wall of the pole terminal; the temperature-resistant piece is annular and is clamped between the connecting part and the first part, and the heat resistance of the temperature-resistant piece is higher than that of the insulating sealing ring. According to the cover plate assembly, the high-temperature resistance of the cover plate assembly can be achieved at low cost, the insulation performance of the cover plate assembly is improved, and the use safety and reliability of the cover plate assembly are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cover plate assembly, a battery and an electronic device. Background Technique

[0002] The battery housing is an essential part of a cylindrical battery, which is used to accommodate the core package assembly and the terminal assembly of the battery. The terminal assembly is used to connect with electronic components, sensors or connectors to realize the external discharge function of the cylindrical battery. At the same time, the terminal assembly and the battery housing are often insulated and connected through an upper plastic part to avoid unsafe phenomena such as short circuits in the cylindrical battery.

[0003] Since cylindrical batteries are developing towards high energy density and high charge-discharge power, the short-term current intensity of the terminal assembly is large and the usage frequency is high. Therefore, the heat generated by the terminal assembly is relatively high. So while ensuring good insulation between the terminal assembly and the battery housing, it is also required that the battery cover plate assembly, the terminal assembly and the upper plastic part have certain high-temperature resistance and aging resistance. The existing upper plastic part can only ensure stable insulation performance below 300°C, while the insulation performance of the plastic part will drop significantly above 300°C, and even the upper plastic part will melt above a certain temperature, resulting in poor insulation and even short circuits. To improve the heat resistance of the upper plastic part so that it can withstand temperatures above 500°C and maintain insulation stability under a high-voltage test of more than 2.5 kV, a special ceramic high-temperature-resistant material needs to be used to make the upper plastic part, which will undoubtedly increase the manufacturing cost of the upper plastic part.

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

[0005] The purpose of the utility model is to provide a cover plate assembly, which can achieve the high-temperature resistance performance of the cover plate assembly at low cost, and its insulation performance is improved, thereby improving the use safety and reliability of the cover plate assembly.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The cover plate assembly includes a cover plate body, a pole terminal, an insulating sealing ring, and a heat-resistant member. The cover plate body is provided with a mounting hole; the pole terminal is inserted into the mounting hole, and a connecting portion extending radially beyond the mounting hole is provided at the top of the pole terminal; the insulating sealing ring is annular, and the insulating sealing ring includes a first portion and a second portion that are perpendicular to each other. The bottom wall of the first portion abuts against the top wall of the cover plate body, and the second portion is clamped between the circumferential inner wall of the mounting hole and the circumferential outer wall of the pole terminal; the heat-resistant member is annular and is clamped between the connecting portion and the first portion, and the heat resistance of the heat-resistant member is higher than that of the insulating sealing ring.

[0008] Optionally, an avoidance groove is provided on the bottom wall of the connecting portion, and the heat-resistant member is fitted and accommodated in the avoidance groove.

[0009] Optionally, the avoidance groove is communicated with the circumferential outer wall of the connecting portion, and the outer diameter of the heat-resistant member is not greater than the outer diameter of the connecting portion.

[0010] Optionally, the inner diameter of the heat-resistant member is not less than the inner diameter of the insulating sealing ring.

[0011] Optionally, the insulating sealing ring further includes a third portion perpendicular to the second portion, and the third portion abuts against the bottom wall of the cover plate body.

[0012] Optionally, the bottom of the pole terminal includes an abutting portion extending radially beyond the mounting hole, and the third portion is clamped between the abutting portion and the cover plate body.

[0013] Optionally, the insulating sealing ring is made of any one of polyphenylene sulfide parts, liquid crystal polymer parts, polyether ether ketone parts, and soluble polytetrafluoroethylene parts.

[0014] Optionally, the heat-resistant member is made of any one of ceramic parts, mica parts, and silicone rubber parts.

[0015] Another object of the present invention is to provide a battery, which includes the cover plate assembly described in any of the above solutions.

[0016] Another object of the present invention is to provide an electronic device, which includes the battery described in the above solution.

[0017] Beneficial effects:

[0018] In the cover plate assembly of the present utility model, by opening an installation hole on the cover plate body, inserting the pole terminal into the installation hole, and using the second part of the insulating sealing ring to clamp between the circumferential side wall of the pole terminal and the circumferential inner wall of the installation hole, and the first part of the insulating sealing ring abuts against the top of the cover plate body, the sealed insulation connection between the pole terminal and the cover plate body is realized; at the same time, a heat-resistant part is clamped between the connection part at the top of the pole terminal and the first part. When the cover plate assembly is placed in a high-temperature environment, due to the heat resistance of the heat-resistant part being higher than that of the insulating sealing ring, even if the insulating sealing ring is damaged or fails at high temperature, the heat-resistant part can still maintain good insulation performance in the high-temperature environment, preventing the pole terminal from contacting the cover plate body due to the damage of the sealed insulation ring, ensuring the reliability of the insulation between the pole terminal and the cover plate body, and without the need to make the entire sealed insulation ring from the heat-resistant part, the high-temperature resistance performance of the battery is realized at low cost, and its insulation performance is improved, improving the use safety and reliability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an axonometric view of the battery provided by the specific embodiment of the present utility model;

[0020] Figure 2 is a longitudinal sectional view of the battery with the battery core hidden provided by the specific embodiment of the present utility model;

[0021] Figure 3 is Figure 2 a partial enlarged view of part A in

[0022] In the figure:

[0023] 100, cover plate body; 110, installation hole; 120, lower housing; 200, pole terminal; 210, connection part; 220, abutting part; 300, insulating sealing ring; 310, first part; 320, second part; 330, third part; 400, heat-resistant part. SPECIFIC EMBODIMENTS

[0024] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the sake of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0025] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0027] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0028] Please refer to Figure 1 and Figure 2 , the cover plate assembly in this embodiment is used for cylindrical batteries. The cover plate body 100 is actually integrally formed with the lower shell 120, and the lower shell 120 is provided with a through hole for the battery core to be placed. Of course, this cover plate assembly can also be applied to square batteries, and only the specific structure of the cover plate assembly described in this embodiment needs to be adopted. The cover plate assembly is directly installed on the bottom shell of the square battery, which will not be elaborated here. Next, the specific structure of the cover plate assembly in this embodiment will be described in detail with reference to Figure 2 and Figure 3 in detail.

[0029] As Figure 2 and Figure 3As shown in the figure, the cover plate assembly includes a cover plate body 100, a pole terminal 200, an insulating sealing ring 300, and a heat-resistant component 400. The cover plate body 100 is provided with a mounting hole 110; the pole terminal 200 is inserted into the mounting hole 110, and a connecting portion 210 extending radially beyond the mounting hole 110 is provided at the top of the pole terminal 200; the insulating sealing ring 300 is annular, and the insulating sealing ring 300 includes a first portion 310 and a second portion 320 that are perpendicular to each other. The bottom wall of the first portion 310 abuts against the top wall of the cover plate body 100, and the second portion 320 is clamped between the circumferential inner wall of the mounting hole 110 and the circumferential outer wall of the pole terminal 200; the heat-resistant component 400 is annular and is clamped between the connecting portion 210 and the first portion 310, and the heat resistance of the heat-resistant component 400 is higher than that of the insulating sealing ring 300.

[0030] In the cover plate assembly of this embodiment, by providing a mounting hole 110 in the cover plate body 100, inserting the pole terminal 200 into the mounting hole 110, and using the second portion 320 of the insulating sealing ring 300 to be clamped between the circumferential side wall of the pole terminal 200 and the circumferential inner wall of the mounting hole 110, and the first portion 310 of the insulating sealing ring 300 abuts against the top of the cover plate body 100, a sealed and insulated connection between the pole terminal 200 and the cover plate body 100 is achieved; at the same time, a heat-resistant component 400 is clamped between the connecting portion 210 at the top of the pole terminal 200 and the first portion 310. When the cover plate assembly is placed in a high-temperature environment, since the heat resistance of the heat-resistant component 400 is higher than that of the insulating sealing ring 300, even if the insulating sealing ring 300 is damaged or fails at high temperature, the heat-resistant component 400 can still maintain good insulation performance in the high-temperature environment, preventing the pole terminal 200 from contacting the cover plate body 100 due to the damage of the sealed insulating ring, ensuring the reliability of the insulation between the pole terminal 200 and the cover plate body 100, and without the need to make the entire sealed insulating ring of the heat-resistant component 400, the high-temperature resistance performance of the battery is achieved at low cost, and its insulation performance is improved, improving the use safety and reliability of the battery.

[0031] In this embodiment, an avoidance groove is provided in the bottom wall of the connecting portion 210, and the heat-resistant component 400 is fitted and accommodated in the avoidance groove. The provision of the avoidance groove can not only position and limit the installation position of the heat-resistant component 400, prevent the heat-resistant component 400 from loosening, improve the installation stability, and thus improve the insulation effect, but also reduce the size of the cover plate assembly in the height direction, thereby reducing the space occupied by the cover plate assembly and improving the energy density of the battery using the cover plate assembly.

[0032] Further, the avoidance groove is communicated with the outer circumferential wall of the connecting portion 210, and the outer diameter of the temperature-resistant member 400 is not greater than the outer diameter of the connecting portion 210. That is to say, the avoidance groove is formed by opening from the outer circumferential wall of the connecting portion 210 toward the central axis. When installing the temperature-resistant member 400, it is only necessary to align the inner circumferential wall of the temperature-resistant member 400 with one side wall of the avoidance groove, which improves the positioning efficiency, facilitates the assembly of the temperature-resistant member 400, and thus improves the production efficiency. At the same time, the outer diameter of the temperature-resistant member 400 is not greater than the outer diameter of the connecting portion 210, so that the outer circumferential wall of the temperature-resistant member 400 does not exceed the connecting portion 210, making the temperature-resistant member 400 and the pole terminal 200 form an integral body, improving the aesthetic degree and preventing the temperature-resistant member 400 from being damaged by external object collision, and improving the reliability of use.

[0033] Optionally, the inner diameter of the temperature-resistant member 400 is not less than the inner diameter of the insulating sealing ring 300. The temperature-resistant member 400 arranged in this way has a coverage area in the vertical projection that is smaller than the coverage area of the sealing insulating ring, so that the size of the temperature-resistant member 400 can be made as small as possible, thereby reducing the production cost. At the same time, the contact surfaces between the pole terminal 200, the temperature-resistant member 400, and the insulating sealing ring 300 form a plurality of stepped structures, thereby improving the sealing performance.

[0034] As a preferred embodiment, the insulating sealing ring 300 further includes a third portion 330 perpendicular to the second portion 320, and the third portion 330 abuts against the bottom wall of the cover plate body 100. Thus, the longitudinal section of the insulating sealing ring 300 is in a "C" shape, realizing multi-channel sealing between the insulating sealing ring 300, the mounting hole 110, and the cover plate body 100, and improving the insulation and sealing effects.

[0035] Specifically, the thickness of the temperature-resistant member 400 is the same as the thickness of the avoidance groove, and the thickness of the temperature-resistant member 400 is not less than 0.3 mm. If the thickness of the temperature-resistant member 400 is less than 0.3 mm, the high-temperature resistance performance of the temperature-resistant member 400 cannot be guaranteed. The specific thickness selection is determined by those skilled in the art according to the working environment and specific dimensions of the cover plate assembly, and will not be elaborated here.

[0036] Please continue to refer to Figure 3 , the bottom of the pole terminal 200 includes a contact portion 220 that extends radially beyond the mounting hole 110, and the third portion 330 is clamped between the contact portion 220 and the cover plate body 100. The pole terminal 200 is riveted and fixed in the mounting hole 110 of the cover plate body 100, thus forming the connecting portion 210 and the contact portion 220 at the top and bottom of the pole terminal 200. Through the arrangement of the first portion 310, the second portion 320, and the third portion 330, the pole terminal 200 realizes sealed and insulated connection with the mounting hole 110 and the cover plate body 100, and its insulation effect is better.

[0037] Optionally, the above-mentioned insulating sealing ring 300 is made of any one of polyphenylene sulfide (PPS) parts, liquid crystal polymer (LCP) parts, polyether ether ketone (PEEK) parts, and soluble polytetrafluoroethylene (PFA) parts. In this embodiment, the manufacturing material of the insulating sealing ring 300 is not specifically limited, as long as it has good insulating properties and can withstand high-temperature environments. Specifically, it is a plastic part and has the advantage of low cost.

[0038] Furthermore, the above-mentioned temperature-resistant part 400 is made of any one of ceramic parts, mica parts, and silicone rubber parts. The temperature-resistant part 400 has better heat resistance than the insulating sealing ring 300, that is, it can withstand higher temperatures, but its manufacturing cost is relatively high. In this embodiment, the temperature-resistant part 400 is made of a ceramic part, which will not be elaborated here.

[0039] In this embodiment, a battery is also provided. The battery includes the cover assembly described in any of the above solutions. Specifically, this battery is a cylindrical battery. Its cover body 100 is actually integrally formed with the lower shell 120, and the lower shell 120 is provided with a through hole for the battery core to be placed in. The battery has the beneficial effects of the cover assembly described in any of the above solutions, which will not be elaborated here. Specifically, the temperature-resistant part 400 of this battery can still maintain good insulating properties in a high-temperature environment, avoiding the pole terminal 200 from contacting the cover body 100 due to the damage of the sealing insulating ring, ensuring the insulation reliability between the pole terminal 200 and the cover body 100. And it is not necessary to make the entire sealing insulating ring of the temperature-resistant part 400, realizing the high-temperature resistance performance of the battery at low cost, and improving its insulating performance, thereby improving the use safety and reliability of the battery.

[0040] In this embodiment, an electronic device is also provided. The electronic device includes the battery described in the above solution. Specifically, the electronic device can be a battery module, a battery pack, an electric bicycle, an electric vehicle, a hybrid vehicle, a ship, an energy storage device, etc., as long as it uses the power of the battery as the energy source, which will not be elaborated here.

[0041] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Cover plate assembly, characterized in that, Comprising: A cover body (100), the cover body (100) being provided with a mounting hole (110); A pole terminal (200), the pole terminal (200) being inserted into the mounting hole (110), and a connecting portion (210) extending radially beyond the mounting hole (110) being provided at the top of the pole terminal (200); An insulating sealing ring (300), the insulating sealing ring (300) being annular, the insulating sealing ring (300) including a first portion (310) and a second portion (320) that are perpendicular to each other, the bottom wall of the first portion (310) abutting against the top wall of the cover body (100), and the second portion (320) being clamped between the circumferential inner wall of the mounting hole (110) and the circumferential outer wall of the pole terminal (200); A temperature-resistant member (400), the temperature-resistant member (400) being annular and clamped between the connecting portion (210) and the first portion (310), and the heat resistance of the temperature-resistant member (400) being higher than that of the insulating sealing ring (300).

2. The cover plate assembly according to claim 1, wherein A relief groove is provided in the bottom wall of the connecting portion (210), and the temperature-resistant member (400) is fitted and accommodated in the relief groove.

3. The cover plate assembly according to claim 2, wherein, The relief groove is communicated with the circumferential outer wall of the connecting portion (210), and the outer diameter of the temperature-resistant member (400) is not greater than the outer diameter of the connecting portion (210).

4. The cover plate assembly according to claim 3, wherein, The inner diameter of the temperature-resistant member (400) is not less than the inner diameter of the insulating sealing ring (300).

5. The cover plate assembly according to claim 1, characterized in that, The insulating sealing ring (300) further includes a third portion (330) perpendicular to the second portion (320), and the third portion (330) abuts against the bottom wall of the cover body (100).

6. The cover plate assembly according to claim 5, wherein The bottom of the pole terminal (200) includes an abutting portion (220) extending radially beyond the mounting hole (110), and the third portion (330) is clamped between the abutting portion (220) and the cover body (100).

7. The cover plate assembly according to any one of claims 1-6, characterized in that, The insulating sealing ring (300) is made of any one of a polyphenylene sulfide member, a liquid crystal polymer member, a polyether ether ketone member, and a soluble polytetrafluoroethylene member.

8. The cover plate assembly according to any one of claims 1-6, characterized in that, The temperature-resistant member (400) is made of any one of a ceramic member, a mica member, and a silicone rubber member.

9. The battery is characterized in that, Comprising the cover assembly according to any one of claims 1-8.

10. An electronic device, characterized in that, Comprising the battery according to claim 9.

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