Explosion-proof cap and battery

Abstract

The utility model relates to an explosion-proof cap and a battery, the explosion-proof cap comprises a first cover plate and a second cover plate, the first cover plate is electrically connected with a tab, the second cover plate is connected with the first cover plate in an insulating manner, the first cover plate is provided with a first through hole, the second cover plate is provided with a second through hole, and the first through hole and the second through hole are opposite in position and are separated from each other through a sealing piece. According to the explosion-proof cap and the battery, the explosion-proof cap is a brand-new design scheme of the explosion-proof cap, the two layers of cover plates with the through holes are adopted, and the sealing and explosion-proof functions are realized by matching with the sealing element, so that the cost can be effectively reduced, and the production efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and more specifically, to an explosion-proof cap and a battery. Background Technology

[0002] In today's world, technological innovation is a key force driving social progress, especially in the energy sector, where every breakthrough in battery technology signifies a significant leap in quality of life. Among these advancements, ensuring user safety while maintaining high performance has become a core issue of industry concern. Battery explosion-proof technology, in particular, as the last line of defense for safety, is undeniably crucial. However, the laser grooving method relied upon by traditional explosion-proof caps, while once considered an industry standard, has gradually revealed its drawbacks due to its inherent limitations.

[0003] Complex process flow: Laser grooving requires highly precise operation. From preparation to execution, every step needs to be strictly controlled, which places extremely high demands on the production line and increases the difficulty of operation and time cost.

[0004] Yield Challenge: Due to the difficulty in perfectly controlling the precision and consistency of laser grooving, some finished products fail to meet standards during the testing phase, directly affecting the final product quality and user trust.

[0005] Increased cost burden: Frequent technical adjustments and material waste have significantly increased the cost of each unit of product, which is detrimental to large-scale production and market competition.

[0006] Faced with these challenges, the industry is urgently calling for more advanced, efficient, and economical alternatives. Utility Model Content

[0007] In view of this, the present invention provides an explosion-proof cap, which is a brand-new explosion-proof cap design. It adopts two layers of cap plates with through holes and is used in conjunction with sealing elements to achieve sealing and explosion-proof functions, which can effectively reduce costs and improve production efficiency.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] An explosion-proof cap includes a first cover plate electrically connected to an electrode lug and a second cover plate insulated from the first cover plate. The first cover plate has a first through hole, and the second cover plate has a second through hole. The first through hole and the second through hole are positioned opposite each other and separated by a sealing element.

[0010] The new explosion-proof cap design employs a two-layer cover with through-holes, combined with a sealant to achieve both sealing and explosion-proof functions, effectively reducing costs and improving production efficiency. The first cover is directly connected to the battery tabs, responsible for conductivity; the second cover is insulated from it, together forming a complete protection system that effectively avoids the risk of short circuits. Through-holes are provided on each cover layer, separated by a sealant. When the internal pressure of the battery abnormally increases, simply breaking through this sealant quickly releases the pressure, achieving a highly efficient explosion-proof effect. Compared to traditional laser-etched grooves, the through-hole design can be easily completed through a simple stamping process, greatly simplifying the production process, improving efficiency, significantly reducing manufacturing time and material waste, and lowering the unit product cost.

[0011] In addition to its explosion-proof function, the through holes on the cover plate can also be used as process positioning holes, making it highly practical.

[0012] Preferably, there is a gap between the first cover plate and the second cover plate, and the gap is filled with the sealing element.

[0013] By creating a gap between the first and second cover plates and filling it with a sealant, the connection between the cover and the battery tabs can be made more airtight, enhancing the overall structural stability of the cover and reducing structural deformation caused by changes in external pressure. This protects the internal components of the battery from damage. The sealant can also absorb thermal expansion and contraction caused by temperature changes, maintaining good contact between the cover and the battery tabs, avoiding poor contact caused by temperature changes, and improving the safety and reliability of the battery.

[0014] Preferably, the seal is made of insulating material, and the first cover plate and the second cover plate are insulatedly connected by the seal.

[0015] The use of seals made of insulating materials can effectively isolate the first and second cover plates, preventing internal short circuits in the battery and improving battery safety.

[0016] Preferably, the seal is made of heat-sealing adhesive.

[0017] Using heat-sealing adhesives as sealants simplifies the production process, enabling rapid and efficient sealing through heat sealing technology, thus reducing production costs. The use of heat-sealing adhesives allows for automated production, improving efficiency, reducing manual operation, and minimizing human error. Heat-sealing adhesives possess excellent adhesion and sealing properties, and can rapidly cure at high temperatures to form a stable sealing layer, improving the battery's sealing performance. Heat-sealing adhesives can be customized according to different materials and shapes, adapting to various battery cap design requirements and providing flexible solutions.

[0018] Preferably, the first cover plate is provided with a pole post, and the first through hole and the pole post are staggered.

[0019] The staggered distribution design reduces direct interference between the pole and the first through hole, ensuring that they operate independently without interfering with each other.

[0020] Preferably, the second cover plate is provided with an electrode opening, through which the electrode passes.

[0021] A battery comprising an explosion-proof cap as described above.

[0022] By integrating the aforementioned explosion-proof cap into the battery, costs can be effectively reduced and production efficiency improved. When the internal pressure rises abnormally, the sealing element can release pressure, effectively preventing battery explosion and ensuring user safety.

[0023] Preferably, it also includes a housing, a core, and a tab, wherein the second cover plate is separately connected to the housing, integrally formed, or is part of the housing.

[0024] The second cover plate can be connected separately from the casing, integrally molded, or integrated as part of the casing, providing flexible manufacturing options. The most suitable manufacturing method can be selected based on production needs and cost-effectiveness. Integral molding or integration as part of the casing can improve the overall structural strength of the battery and reduce potential weaknesses during assembly. Separate connection designs can reduce material usage and manufacturing steps, lowering production costs.

[0025] Preferably, one end of the tab is connected to the first cover plate and the other end is connected to the winding core. An insulating element is provided on the top of the winding core, and the first cover plate is located above the insulating element.

[0026] The tabs are stably connected to the first cover plate. The use of insulating components improves the battery's insulation performance, reduces the risk of leakage, and enhances battery safety.

[0027] The advantages of this utility model compared to the prior art are:

[0028] This utility model presents a novel explosion-proof cap design. It employs a two-layer cover plate with through-holes, combined with a sealing element to achieve both sealing and explosion-proof functions, effectively reducing costs and improving production efficiency. The first cover plate is directly connected to the battery terminals, responsible for conductivity; the second cover plate is insulated from it, together forming a complete protection system that effectively avoids the risk of short circuits. Through-holes are provided on each cover plate, separated by a sealing element. When the internal pressure of the battery abnormally increases, simply breaking through this sealing element quickly releases the pressure, achieving a highly efficient explosion-proof effect. Compared to traditional laser-etched grooves, the through-hole design can be easily completed through a simple stamping process, greatly simplifying the production process, improving efficiency, significantly reducing manufacturing time and material waste, and lowering the unit product cost. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an exploded view of an embodiment of the explosion-proof cap of this utility model.

[0031] Figure 2 This is a cross-sectional view of an embodiment of the explosion-proof cap of this utility model.

[0032] Figure 3 This is a structural diagram of an explosion-proof cap according to an embodiment of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of this application, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0037] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0038] This embodiment provides a battery, including a casing 100, a winding core 200, tabs 300, and an explosion-proof cap 400. The explosion-proof cap 400 includes a first cover plate 410 electrically connected to the tabs 300 and a second cover plate 420 insulated from the first cover plate 410. The first cover plate 410 has a first through hole 411, and the second cover plate 420 has a second through hole 421. The first through hole 411 and the second through hole 421 are opposite to each other and separated by a sealing member 430. The second cover plate 420 is separately connected to the casing 100. One end of the tab 300 is connected to the first cover plate 410, and the other end is connected to the winding core 200. An insulating member 210 is provided on the top of the winding core 200, and the first cover plate 410 is located above the insulating member 210. An insulating member 220 is provided on the top of the winding core 200. In other embodiments, the second cover plate 420 and the casing 100 may be integrally formed or be part of the casing 100.

[0039] The new explosion-proof cap design employs a two-layer cover plate with through holes, combined with a seal 430 to achieve sealing and explosion-proof functions, effectively reducing costs and improving production efficiency. The first cover plate 410 is directly connected to the battery tab 300, responsible for conductivity; the second cover plate 420 is insulated from it, together forming a complete protection system, effectively avoiding the risk of short circuits. Through holes are provided on each cover plate, with the seal 430 separating the two through holes. When the internal pressure of the battery abnormally increases, simply breaking through this seal 430 can quickly release the pressure, achieving a highly efficient explosion-proof effect. Compared to traditional laser grooving, the through-hole design can be easily completed through a simple stamping process, greatly simplifying the production process, improving efficiency, significantly reducing manufacturing time and material waste, and lowering the unit product cost.

[0040] In addition to its explosion-proof function, the through holes on the cover plate can also be used as process positioning holes, making it highly practical.

[0041] In this embodiment, there is a gap between the first cover plate 410 and the second cover plate 420, and the gap is filled with a sealing element 430.

[0042] A gap is provided between the first cover plate 410 and the second cover plate 420, and a seal 430 is filled in to ensure a more airtight connection between the cap and the battery tab 300, enhance the overall structural stability of the cap, reduce structural deformation caused by changes in external pressure, thereby protecting the internal components of the battery from damage. The seal 430 can also absorb thermal expansion and contraction caused by temperature changes, maintain good contact between the cap and the battery tab 300, avoid poor contact caused by temperature changes, and improve the safety and reliability of the battery.

[0043] In this embodiment, the seal 430 is made of insulating material, and the first cover plate 410 and the second cover plate 420 are insulatedly connected through the seal 430.

[0044] The seal 430, made of insulating material, can effectively isolate the first cover plate 410 and the second cover plate 420, preventing internal short circuits in the battery and improving battery safety.

[0045] In this embodiment, the seal 430 is made of heat-sealing adhesive.

[0046] Using heat-sealing adhesive as a sealant (430) simplifies the production process, enabling rapid and efficient sealing through heat sealing technology, thus reducing production costs. The use of heat-sealing adhesive allows for automated production, improving efficiency, reducing manual operation, and minimizing human error. Heat-sealing adhesive possesses excellent adhesion and sealing properties, and can rapidly cure at high temperatures to form a stable sealing layer, improving the battery's sealing performance. Heat-sealing adhesive can be customized according to different materials and shapes, adapting to various battery cap design requirements and providing flexible solutions.

[0047] In this embodiment, the first cover plate 410 is provided with a pole post 412, and the first through hole 411 is staggered with the pole post 412.

[0048] The staggered distribution design can reduce the direct interference between the pole post 412 and the first through hole 411, ensuring that the two operate independently and do not interfere with each other.

[0049] In this embodiment, the second cover plate 420 is provided with a pole post opening 422, and the pole post 412 passes through the pole post opening 422.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof cap, characterized by, The first cover plate and the second cover plate are insulated from each other by a sealing member.

2. The explosion-proof cap of claim 1, wherein, The first cover plate and the second cover plate are insulated from each other by a sealing member.

3. The explosion-proof cap of claim 1, wherein, The sealing member is made of an insulating material.

4. The explosion-proof cap of claim 1, wherein, The sealing member is made of a heat-sealing glue.

5. The explosion-proof cap of claim 1, wherein, The first cover plate is provided with a pole post, and the first through hole is distributed in a staggered manner with the pole post.

6. The explosion-proof cap of claim 5, wherein, The second cover plate is provided with a pole post opening, and the pole post passes through the pole post opening.

7. A battery, characterized by The explosion-proof cap also comprises a shell, a winding core and a tab.

8. The battery of claim 7, wherein, The second cover plate is connected to the shell in a separate manner, is integrally formed with the shell or is a part of the shell.

9. The battery of claim 8, wherein, One end of the tab is connected to the first cover plate, and the other end is connected to the winding core.

10. The battery of claim 8, wherein, The top of the winding core is provided with an insulating member, and the first cover plate is located above the insulating member.

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