Battery cap and battery thereof

Abstract

The battery cap comprises an upper cover assembly and a lower bottom assembly, the upper cover assembly comprises an upper cover, a first gasket, a second gasket, a thermosensitive element and an insulating ring, the upper cover is provided with a protruding part and an abutting part which are connected with each other, the thermosensitive element, the abutting part and the insulating ring are sequentially stacked on the first gasket, and the second gasket is arranged on the lower bottom assembly. The second gasket is connected with the first gasket; the lower bottom assembly comprises a lower bottom, an anti-explosion film, a third gasket and a mounting ferrule, the anti-explosion film and the third gasket are sequentially stacked in the lower bottom, and the lower bottom is arranged in the mounting ferrule. According to the battery cap disclosed by the utility model, the upper cover assembly and the lower bottom assembly are arranged, so that the thermosensitive element can be effectively fixed in the first gasket under the clamping matching of the first gasket and the second gasket, the unstable performance or failure of the thermosensitive element caused by the extrusion of external force is avoided, the overall structural strength is better, and the service life of the battery cap is prolonged. And an effective current disconnection protection effect can be achieved when the battery is short-circuited.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a battery cap and its battery. Background Technology

[0002] In battery caps, thermal protection elements are typically used to suppress current. When the battery temperature is too high, the thermal protection element increases resistance to disconnect the entire battery, thus providing protection. However, existing thermal protection elements are usually placed directly at the mounting position on the battery cap. This makes them prone to loosening or displacement during assembly or under external force, leading to their failure and potentially posing a safety hazard to the overall battery structure. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a battery cap and battery with a more stable and reliable overall structure that can effectively disconnect current when the battery is short-circuited.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A battery cap includes an upper cover assembly and a lower base assembly. The upper cover assembly includes an upper cover, a first gasket, a second gasket, a thermistor, and an insulating ring. The upper cover has interconnected protrusions and abutments. The thermistor, the abutment, and the insulating ring are stacked sequentially on the first gasket, with the thermistor and the abutment located within the insulating ring. The second gasket is connected to the first gasket, and the first and second gaskets correspond and cooperate with each other. The side of the insulating ring away from the first gasket abuts against the second gasket. The lower base assembly includes a lower base, an explosion-proof film, a third gasket, and a mounting ring. The explosion-proof film and the third gasket are stacked sequentially within the lower base, which is located within the mounting ring. When the upper cover assembly is installed within the mounting ring, the first gasket abuts against both the lower base and the third gasket.

[0006] In one embodiment, the first gasket has a first placement groove and the second gasket has a second placement groove. When the first gasket and the second gasket are connected, the first placement groove and the second placement groove correspond to each other to form a placement area, and the thermal element, the insulating ring and the supporting part are respectively located in the placement area.

[0007] In one embodiment, the first gasket has a first welding portion near the first placement groove, and the second gasket has a second welding portion near the second placement groove, wherein the first welding portion and the second welding portion are welded together.

[0008] In one embodiment, the first welded portion and the second welded portion are both planar structures.

[0009] In one embodiment, the insulating ring has an "L"-shaped cross-section.

[0010] In one embodiment, the insulating ring is an insulating rubber ring structure.

[0011] In one embodiment, the thermistor is a thermistor.

[0012] In one embodiment, an installation groove is provided on the bottom, and the explosion-proof film and the third gasket are stacked sequentially in the installation groove.

[0013] In one embodiment, the lower bottom is provided with a folded edge portion near the mounting groove. The folded edge portion is used to fold towards the third gasket so that the third gasket is pressed and fixed in the mounting groove, and the first gasket abuts against the folded edge portion.

[0014] A battery includes the aforementioned battery cap and battery cell, wherein the battery cap is connected to the battery cell.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] 1. The battery cap of this utility model, by setting an upper cover assembly and a lower bottom assembly, enables the thermal element to be effectively fixed in the first gasket under the clamping cooperation of the first gasket and the second gasket. This can prevent the thermal element from falling off under external force, resulting in better overall structural strength and effective current disconnection protection when the battery is short-circuited.

[0017] 2. The battery cap of this utility model uses the first gasket and the second gasket to install and fix the thermal element, so that the thermal element will not be squeezed after the installation ring is wrapped, thereby ensuring that the thermal element has good and stable performance, thereby improving the safety and stability of the battery product. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0019] Figure 1 This is a schematic diagram of the structure of the battery cap in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 An exploded view of the battery cap. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Figure 1 and Figure 2 As shown, a battery cap 10 includes an upper cover assembly 100 and a lower base assembly 200. The upper cover assembly 100 includes an upper cover 110, a first gasket 120, a second gasket 130, a thermistor 140, and an insulating ring 150. The upper cover 110 is provided with a protrusion 111 and a supporting portion 112 connected to each other. The thermistor 140, the supporting portion 112, and the insulating ring 150 are stacked sequentially on the first gasket 120, and the thermistor 140 and the supporting portion 112 are located inside the insulating ring 150. The second gasket 130 is connected to the first gasket 120. Furthermore, the first gasket 120 and the second gasket 130 correspond to each other and cooperate, and the side of the insulating ring 150 away from the first gasket 120 abuts against the second gasket 130; the lower bottom assembly 200 includes a lower bottom 210, an explosion-proof film 220, a third gasket 230 and a mounting ring 240. The explosion-proof film 220 and the third gasket 230 are stacked in sequence inside the lower bottom 210, and the lower bottom 210 is disposed inside the mounting ring 240. When the upper cover assembly 100 is installed inside the mounting ring 240, the first gasket 120 abuts against the lower bottom 210 and the third gasket 230 respectively.

[0022] It should be noted that in the upper cover assembly 100, the thermal element 140 and the upper cover 110 are stacked sequentially on the first gasket 120. At this time, the supporting portion 112 of the upper cover 110 presses against the thermal element 140, and the insulating ring 150 passes through the protrusion 111 of the upper cover 110 and is placed on the first gasket 120, thereby wrapping and fixing the thermal element 140 and the supporting portion 112 of the upper cover 110, making the overall structure more stable and providing good insulation. The structure of the second gasket 130 corresponds to and matches the structure of the first gasket 120. After the installation of the insulating ring 150 is completed, the second gasket 130 passes through the upper cover 120. The protrusion 111 of the 10 is installed and connected to the first gasket 120. At this time, the side of the insulating ring 150 away from the first gasket 120 abuts against the second gasket 130, thereby providing good insulation protection. After the second gasket 130 is installed, the upper cover assembly 100 forms an integral structure, and the thermal element 140 is effectively fixed inside the first gasket 120 under the clamping cooperation of the first gasket 120 and the second gasket 130. This prevents the thermal element 140 from moving under external force, resulting in better overall structural strength and effective current disconnection protection in the event of a battery short circuit. In this embodiment, the second gasket 130 and the first gasket 120 are installed and fixed by welding. This effectively improves the overall structural strength, allowing the thermal element 140 to be better fixed between the first gasket 120 and the second gasket 130. Consequently, the thermal element 140 will not change its installation position under external force, thus providing good current disconnection protection for the battery product. The battery cap 10 of this utility model, by setting an upper cover assembly 100 and a lower bottom assembly 200, allows the thermal element 140 to be effectively fixed within the first gasket 120 under the clamping cooperation of the first gasket 120 and the second gasket 130. This prevents the thermal element 140 from falling off under external force, and also prevents it from being squeezed by external force, resulting in better overall structural strength. It can also play a role in effective current disconnection protection in the event of a battery short circuit. At the same time, by installing and fixing the thermal element through the first and second gaskets, the thermal element is not squeezed after the installation ring is wrapped, thus ensuring that the thermal element has good and stable performance, thereby improving the safety and stability of the battery product.

[0023] Please see Figure 2 In one embodiment, a first placement groove 121 is provided on the first gasket 120, and a second placement groove 131 is provided on the second gasket 130. When the first gasket 120 and the second gasket 130 are connected, the first placement groove 121 and the second placement groove 131 correspond to each other to form a placement area, and the thermal element 140, the insulating ring 150 and the supporting part 112 are respectively located in the placement area.

[0024] It should be noted that the first gasket 120, by providing the first placement groove 121, enables the installation of the thermal element 140, the insulating ring 150, and the supporting part 112. Similarly, the second gasket 130, by providing the second placement groove 131, can cooperate with the first placement groove 121 to install and fix the thermal element 140, the insulating ring 150, and the supporting part 112, thereby making the overall structure more compact. Specifically, after the first gasket 120 and the second gasket 130 are installed and fitted, the first placement groove 121 and the second placement groove 131 correspond to each other to form placement areas. At this time, the thermal element 140, the insulating ring 150 and the supporting part 112 are respectively located in the placement areas. Since the insulating ring 150 is an insulating rubber ring, it can deform during the installation of the first gasket 120 and the second gasket 130, thereby wrapping and fixing the thermal element 140 and the supporting part 112. In this way, not only can the insulation performance be improved, but the overall structure can also be made more compact, so that the thermal element 140 will not move or fall off under the action of external force, thereby improving the overall safety performance of the battery product.

[0025] In one implementation method, please refer again. Figure 2 The first gasket 120 has a first welding portion 122 near the first placement groove 121, and the second gasket 130 has a second welding portion 132 near the second placement groove 131. The first welding portion 122 and the second welding portion 132 are welded together. In this way, the first gasket 120 and the second gasket 130 can be installed and fixed by welding, thereby improving the strength of the overall structure and thus improving the installation stability of the thermistor 140. Alternatively, the first welding portion 122 and the second welding portion 132 are both planar structures, which allows the first gasket 120 to be more flexible and secure. The second gasket 130 fits better together, which facilitates welding and improves the overall compactness of the structure. For example, the insulating ring 150 has an "L"-shaped cross-section and is an insulating rubber ring. This allows the insulating ring 150 to wrap and fix the thermistor 140 and the supporting portion 112, and to cover the top surface of the supporting portion 112, thus providing good insulation. Furthermore, the thermistor is a PTC thermistor, which provides good overheat protection and improves the safety performance of the battery product.

[0026] Combination Figure 1 and Figure 2In one embodiment, a mounting groove 211 is provided on the lower base 210, and the explosion-proof film 220 and the third gasket 230 are stacked sequentially in the mounting groove 211. A folded edge portion 212 is provided on the lower base 210 near the mounting groove 211. The folded edge portion 212 is used to fold towards the third gasket 230 so that the third gasket 230 is pressed and fixed in the mounting groove 211, and the first gasket 120 abuts against the folded edge portion 212.

[0027] It should be noted that the lower base 210, by providing an installation groove 211, allows for the installation and placement of the explosion-proof film 220 and the third gasket 230. After the explosion-proof film 220 and the third gasket 230 are placed, the folded edge portion 212 on the lower base 210 is pressed and connected to the third gasket 230 by folding, thereby fixing the explosion-proof film 220 and the third gasket 230 in the installation groove 211. In this way, the lower base 210, the explosion-proof film 220, and the third gasket 230 form an integral structure, which facilitates subsequent assembly operations and improves the overall structural strength. Specifically, the lower base 210, the explosion-proof film 220, and the third gasket 230 are installed inside the mounting ring 240 and secured by the mounting ring 240. Then, the upper cover assembly 100 is installed into the mounting ring 240. At this time, the first welded portion 122 of the first gasket 120 of the upper cover assembly 100 abuts against the folded edge portion 212 of the lower base 210, and the remaining portion of the first gasket 120 abuts against the third gasket 230, thereby completing the conductive connection operation. Under the fixing action of the mounting ring 240, an integral structure is formed, making the overall structure more compact. In this embodiment, the mounting ring 240 is a rubber ring structure, which provides good protection.

[0028] In one embodiment, a battery includes the aforementioned battery cap 10 and a battery cell. The battery cap is connected to the battery cell. Thus, by installing the battery cap 10 on the battery cell, the thermal element 140 can be effectively fixed within the first gasket 120 under the clamping engagement of the first gasket 120 and the second gasket 130. This prevents the thermal element 140 from falling off under external force, resulting in better overall structural strength and providing effective current disconnection protection during battery short circuits. Simultaneously, by installing and fixing the thermal element with the first and second gaskets, the thermal element is not squeezed after the installation ring is used for edge wrapping, thereby ensuring that the thermal element has good and stable performance, thus improving the safety and stability of the battery product.

[0029] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A battery cap, characterized in that, include: The upper cover assembly includes an upper cover, a first gasket, a second gasket, a thermal element, and an insulating ring. The upper cover is provided with interconnected protrusions and abutments. The thermal element, the abutment, and the insulating ring are stacked sequentially on the first gasket, and the thermal element and the abutment are located inside the insulating ring. The second gasket is connected to the first gasket, and the first gasket and the second gasket are correspondingly engaged. The side of the insulating ring away from the first gasket abuts against the second gasket. and The bottom assembly includes a bottom, an explosion-proof film, a third gasket, and a mounting ring. The explosion-proof film and the third gasket are stacked sequentially inside the bottom, and the bottom is disposed inside the mounting ring. When the top cover assembly is installed inside the mounting ring, the first gasket abuts against the bottom and the third gasket respectively.

2. The battery cap according to claim 1, characterized in that, The first gasket has a first placement groove, and the second gasket has a second placement groove. When the first gasket and the second gasket are connected, the first placement groove and the second placement groove correspond to each other to form a placement area. The thermal element, the insulating ring and the supporting part are respectively located in the placement area.

3. The battery cap according to claim 2, characterized in that, The first gasket has a first welding part near the first placement groove, and the second gasket has a second welding part near the second placement groove. The first welding part and the second welding part are welded together.

4. The battery cap according to claim 3, characterized in that, The first welded part and the second welded part are both planar structures.

5. The battery cap according to claim 1, characterized in that, The cross-section of the insulating ring is "L" shaped.

6. The battery cap according to claim 1, characterized in that, The insulating ring is an insulating rubber ring structure.

7. The battery cap according to claim 1, characterized in that, The thermistor is a thermistor.

8. The battery cap according to claim 1, characterized in that, An installation groove is provided on the bottom, and the explosion-proof film and the third gasket are stacked in sequence into the installation groove.

9. The battery cap according to claim 8, characterized in that, The bottom edge near the mounting groove is provided with a folded edge portion, which is used to fold towards the third gasket so that the third gasket is pressed and fixed in the mounting groove, and the first gasket abuts against the folded edge portion.

10. A battery comprising the battery cap as described in any one of claims 1-9, characterized in that, It also includes individual battery cells, with the battery cap connected to the individual battery cells.

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