Automatic pressure relief reset battery cover plate, secondary battery and electric equipment

Abstract

The utility model provides an automatic pressure-relief reset battery cover plate, a secondary battery and electric equipment, and the automatic pressure-relief reset battery cover plate comprises a body which is provided with an exhaust hole; the exhaust mechanism comprises a connecting body and a sealing body, the connecting body is connected to the body, part of the connecting body is arranged above the exhaust hole and is spaced from the exhaust hole, the sealing body is inserted into the exhaust hole in an interference manner and comprises an elastic filling part and an exhaust part, one end of the elastic filling part is connected with the connecting body, and the other end of the elastic filling part is connected with the exhaust part; the exhaust part is in clearance fit with the exhaust hole, and the elastic filling part moves in the depth direction of the exhaust hole. According to the present invention, the exhaust can be performed in time when the gas production rate in the battery is low so as to form the maximum protection on the internal structure of the battery, the high sealing state of the internal environment of the battery can be achieved through the sealing body when the exhaust is not needed, and the significant advantages of simple structure, convenient assembly processing, low cost and the like are provided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an automatic pressure relief and reset battery cover, a secondary battery and electrical equipment. Background Art

[0002] In modern battery technology, especially lithium-ion batteries, their high energy density and excellent charge and discharge performance have made them widely used in many fields, such as mobile communications, electric vehicles and portable electronic devices. However, the safety of batteries has always been a key factor restricting their widespread application. During the charging and discharging process of the battery, the lithium salt in the electrolyte undergoes redox reactions accompanied by decomposition reactions, which produce a large amount of gas. As the volume of gas continues to increase, the internal pressure of the battery will also increase. If the pressure cannot be effectively released, it may lead to serious accidents such as battery shell rupture, electrolyte leakage, fire and even explosion.

[0003] At present, battery systems usually use venting structures such as explosion-proof discs or safety valves to relieve internal pressure to prevent the above-mentioned safety accidents. The design principle of these venting structures is to release pressure by mechanical deformation or breaking through obstacles when the internal pressure of the battery reaches a certain threshold. However, these venting structures are often disposable, and once activated, the battery will fail and need to be replaced with a new one. This not only increases the cost, but for some applications, such as electric vehicles, the convenience and cost-effectiveness of replacing batteries are important factors to consider.

[0004] In addition, the amount of gas produced by the battery is affected by many factors, including the battery's own materials and manufacturing process, usage conditions (such as temperature, charge and discharge rate), and the battery's life cycle. These factors make it difficult to accurately control the amount of gas produced by the battery, which poses a challenge to the safe management of the battery. In actual applications, there may be a situation where the amount of gas produced is small and can be safely released through the exhaust structure. Therefore, existing battery technology has certain limitations in safety performance, especially the reliability and reusability of the exhaust structure. Summary of the invention

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the problem that the battery exhaust structure in the prior art is difficult to reuse, and to provide an automatic pressure relief and reset battery cover, a secondary battery and an electrical device.

[0006] In order to solve the above technical problems, the utility model provides an automatic pressure relief and reset battery cover, which includes: a main body, on which at least one exhaust hole is provided; at least one exhaust mechanism, at least one exhaust mechanism is arranged in a one-to-one correspondence with at least one exhaust hole, the exhaust mechanism includes a connector and a sealing body, the connector is connected to the main body, part of the connector is arranged above the exhaust hole and is spaced apart from the exhaust hole, the sealing body is interference fit in the exhaust hole, and includes an elastic filling part and an exhaust part, wherein one end of the elastic filling part is connected to the connector, and the other end is connected to the exhaust part, the exhaust part is gap-matched with the exhaust hole, and the elastic filling part moves along the depth direction of the exhaust hole.

[0007] In one embodiment of the utility model, the connecting body includes a first connecting part and a second connecting part, the first connecting part is connected to the main body around the exhaust hole, the second connecting part is arranged above the exhaust hole at intervals and connected to the sealing body, wherein in the thickness direction of the main body, the second connecting part gradually moves away from the first connecting part to the main body.

[0008] In one embodiment of the present invention, the second connecting portion is arranged at the center of the first connecting portion.

[0009] In one embodiment of the present invention, at least one operating groove is provided on the connecting body.

[0010] In one embodiment of the present invention, in the thickness direction of the body, the exhaust portion is inclined from the edge of the elastic filling portion toward the center of the exhaust hole.

[0011] In one embodiment of the present invention, in the thickness direction of the main body, the spacing distance between the connector and the exhaust hole is not less than the deformation amount of the elastic filling portion.

[0012] In one embodiment of the present invention, the body further comprises a pole connection assembly, and the pole connection assembly is spaced apart from at least one of the exhaust holes.

[0013] In an embodiment of the utility model, the pole connection assembly is provided with two pole mounting holes, and the two pole mounting holes are spaced apart along the length direction of the body.

[0014] In one embodiment of the utility model, a mounting step is provided outside the exhaust hole, and the edge of the connecting body is embedded in the main body and supported and connected to the mounting step.

[0015] The utility model also provides a secondary battery, which comprises the above-mentioned automatic pressure-releasing and resetting battery cover.

[0016] The utility model also provides an electrical device, which comprises at least one of the above-mentioned secondary batteries.

[0017] The above technical solution of the utility model has the following advantages compared with the prior art:

[0018] The automatic pressure relief and reset battery cover, secondary battery and electrical equipment described in the utility model realize pneumatic discharge of gas inside the battery by at least one exhaust mechanism filled in the exhaust hole. The exhaust mechanism can be automatically reset and used repeatedly, thereby greatly reducing the scrap rate of the battery, which is of great significance in extending the service life of the battery. The present application can exhaust gas in time when the gas production inside the battery is small, thereby forming the greatest degree of protection for the internal structure of the battery. When no exhaust is required, the internal environment of the battery can be highly sealed through the sealing body. At the same time, the present application also has the significant advantages of simple structure, easy assembly and processing, and low cost. It is a new type of automatic pressure relief and reset battery cover, secondary battery and electrical equipment with broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the automatic pressure relief and reset battery cover in the preferred embodiment of the utility model;

[0021] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the automatic pressure relief and reset battery cover from another perspective;

[0022] Figure 3 yes Figure 1 A schematic diagram of a partial explosion structure in the automatic pressure relief reset battery cover is shown;

[0023] Figure 4 yes Figure 3 Schematic diagram of the method at A in the middle;

[0024] Figure 5 yes Figure 1 A three-dimensional structural schematic diagram of the exhaust mechanism in the automatic pressure relief and reset battery cover;

[0025] Figure 6 yes Figure 3 Front view of the exhaust mechanism shown.

[0026] Explanation of the reference numerals in the specification: 100, main body; 110, exhaust hole; 120, pole connection assembly; 121, pole mounting hole; 130, mounting step; 200, exhaust mechanism; 210, connector; 211, first connecting portion; 2111, operating groove; 212, second connecting portion; 220, sealing body; 221, elastic filling portion; 222, exhaust portion. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0028] Embodiment 1

[0029] See also Figures 1 to 6 As shown, the present embodiment provides an automatic pressure relief and reset battery cover, which includes: a main body 100, on which at least one exhaust hole 110 is provided; at least one exhaust mechanism 200, at least one exhaust mechanism 200 is arranged in a one-to-one correspondence with at least one exhaust hole 110, the exhaust mechanism 200 includes a connector 210 and a sealing body 220, the connector 210 is connected to the main body 100, a portion of the connector 210 is arranged above the exhaust hole 110, and is spaced apart from the exhaust hole 110, the sealing body 220 is interference-inserted in the exhaust hole 110, and includes an elastic filling portion 221 and an exhaust portion 222, wherein one end of the elastic filling portion 221 is connected to the connector 210, and the other end is connected to the exhaust portion 222, the exhaust portion 222 is clearance-matched with the exhaust hole 110, and the elastic filling portion 221 moves along the depth direction of the exhaust hole 110.

[0030] The automatic pressure relief and reset battery cover described in the present invention realizes the pneumatic discharge operation of the gas inside the battery by filling at least one exhaust mechanism 200 inside the exhaust hole 110. The exhaust mechanism 200 can be automatically reset and reused, thereby greatly reducing the scrap rate of the battery, which is of great significance in extending the service life of the battery. The present application can timely exhaust the gas when the gas production inside the battery is small, thereby forming the maximum protection for the internal structure of the battery. When there is no need to exhaust, the sealing body 220 can achieve a highly sealed state of the internal environment of the battery. At the same time, the present application also has the significant advantages of simple structure, easy assembly and processing, and low cost. It is a new type of automatic pressure relief and reset battery cover with broad application prospects.

[0031] See also Figure 1 and Figure 2As shown, the cover plate in this embodiment is suitable for square batteries, and the body 100 is preferably a flat rectangular plate, which is used to cover the battery shell. Further, a pole connection assembly 120 and an exhaust hole 110 are respectively provided at both ends of the plate in the length direction, wherein the pole connection assembly 120 is spaced apart from at least one of the exhaust holes 110, which is used to connect the battery cell, and the exhaust hole 110 is used to cooperate with the exhaust mechanism 200 to discharge excess gas inside the shell. Further, two pole mounting holes 121 are provided on the pole connection assembly 120, and the two pole mounting holes 121 are spaced apart along the length direction of the body 100.

[0032] See also Figure 3 and Figure 4 As shown, a mounting step is provided on the outside of the exhaust hole, and the edge of the connector is embedded in the main body and supported and connected to the mounting step. Specifically, the mounting step is recessed inward from the surface of the main body, thereby providing a semi-enclosed space for the installation and fixation of the connector, thereby improving the stability of the circumferential position of the connector. At the same time, based on the setting of the mounting step, the exhaust mechanism will not protrude excessively in the thickness direction of the main body, thereby minimizing the space occupied by it.

[0033] See also Figure 5 and Figure 6 As shown, in this embodiment, the connecting body 210 includes a first connecting portion 211 and a second connecting portion 212, the first connecting portion 211 is connected to the main body 100 around the exhaust hole 110, and the second connecting portion 212 is spaced above the exhaust hole 110 and connected to the sealing body 220, wherein in the thickness direction of the main body 100, the second connecting portion 212 gradually moves away from the main body 100 from the first connecting portion 211. In this embodiment, the first connecting portion 211 is preferably a circular element with a diameter greater than the exhaust hole 110, which is convenient for fixedly fitting and connecting with the surface of the main body 100, and is arranged at the center of the first connecting portion 211. The second connecting portion 212 is a circular horizontal element with the same diameter as the sealing body 220. The first connecting portion 211 and the second connecting portion 212 are evenly connected by an inclined surface, and the two are actually arranged as one body, thereby ensuring that the second connecting portion 212 and the main body 100 are spaced apart. This structural setting is used to realize the connection between the exhaust mechanism 200 and the main body 100 on the one hand, and on the other hand, it can also provide space for the compression movement of the sealing body 220, thereby ensuring that when gas is generated inside the shell, the sealing body 220 can be squeezed to the outside of the exhaust hole 110 by air pressure, thereby achieving the purpose of exhaust. Furthermore, in the thickness direction of the main body 100, the spacing distance between the connecting body 210 and the exhaust hole 110 is not less than the deformation amount of the elastic filling portion.

[0034] In this embodiment, at least one operation groove 2111 is provided on the connecting body 210. Specifically, three operation grooves 2111 are evenly spaced on the transition slope between the first connecting portion 211 and the second connecting portion 212, and the operator can adjust the angle and / or position, disassemble and install, and connect and fix the exhaust mechanism 200 through the operation grooves 2111. The present invention does not impose any specific restrictions on the specific shape, number, and setting position of the operation grooves 2111.

[0035] See also Figure 5 and Figure 6 As shown, the elastic filling portion 221 in this embodiment is preferably a cylindrical rubber element with a diameter slightly larger than the exhaust hole 110. In the thickness direction of the body 100, the exhaust portion 222 is tilted from the edge of the elastic filling portion 221 toward the center of the exhaust hole 110. Based on this, the exhaust portion 222 in this embodiment is arranged at the center of the connector 210, so that when it is squeezed by the gas, the force can be evenly dispersed to the connector 210, thereby ensuring that the connector 210 can move along the thickness direction of the body 100. Further, the elastic filling portion 221 and the exhaust portion 222 in this embodiment are fixedly connected and are actually integrated. Based on this, when the elastic filling portion 221 moves toward the connector 210 under the action of the air pressure inside the shell, the exhaust portion 222 can move synchronously with the elastic filling portion 221. When the exhaust portion 222 moves above the exhaust hole 110, it can connect the internal and external environments of the battery shell, thereby releasing the gas inside the shell. Accordingly, in other embodiments, the exhaust portion 222 may be configured to have other shapes that can form a gap structure with the exhaust hole 110 , and the present invention does not impose any specific limitation on this.

[0036] The following describes the operation process and principle of the automatic pressure relief and reset battery cover in this embodiment:

[0037] When the internal environment of the battery is stable and there is no excess gas, the sealant 220 is inserted into the exhaust hole 110 with interference fit and can isolate the environment inside and outside the battery housing, thereby creating a stable space for normal use of the battery;

[0038] After repeated charge and discharge operations, the electrolyte inside the battery will gradually generate gas. When the gas reaches a certain level, it will squeeze the sealing body 220 outward, thereby pushing the sealing body 220 to squeeze and move toward the connecting body 210 until the exhaust portion 222 is higher than the exhaust hole 110, and the sealing environment inside the shell is broken, and the gas is released from the exhaust hole 110;

[0039] When the gas inside the battery is released, the sealant 220 can return to its original position due to its own elastic recovery, thereby re-creating a sealed environment of the battery shell, thereby effectively extending the battery life.

[0040] Embodiment 2

[0041] This embodiment provides a secondary battery, which includes the automatic pressure-releasing and resetting battery cover described in the first embodiment.

[0042] Embodiment 3

[0043] This embodiment provides an electrical device, which includes the secondary battery described in the second embodiment.

[0044] Furthermore, the secondary battery in this embodiment can be used in automobiles, portable devices, laptop computers, ships, spacecraft, electric toys, electric tools, etc. Automobiles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0045] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. An automatic pressure relief and reset battery cover, characterized in that: include: A body, wherein at least one exhaust hole is provided on the body; At least one exhaust mechanism, at least one of the exhaust mechanisms is arranged in a one-to-one correspondence with at least one of the exhaust holes, the exhaust mechanism includes a connector and a sealing body, the connector is connected to the main body, a portion of the connector is arranged above the exhaust hole and is spaced apart from the exhaust hole, the sealing body is interference fit in the exhaust hole, and includes an elastic filling part and an exhaust part, wherein one end of the elastic filling part is connected to the connector, and the other end is connected to the exhaust part, the exhaust part is gap-matched with the exhaust hole, and the elastic filling part moves along the depth direction of the exhaust hole.

2. The automatic pressure relief and reset battery cover according to claim 1, characterized in that: The connecting body includes a first connecting portion and a second connecting portion, the first connecting portion is connected to the main body around the exhaust hole, the second connecting portion is spaced above the exhaust hole and connected to the sealing body, wherein in the thickness direction of the main body, the second connecting portion gradually moves away from the first connecting portion to the main body.

3. The automatic pressure relief and reset battery cover according to claim 2, characterized in that: The second connection portion is disposed at the center of the first connection portion.

4. The automatic pressure relief and reset battery cover according to claim 2 or 3, characterized in that: The connecting body is provided with at least one operating groove.

5. The automatic pressure relief and reset battery cover according to claim 1, characterized in that: In the thickness direction of the body, the exhaust portion is inclined from the edge of the elastic filling portion toward the center of the exhaust hole.

6. The automatic pressure relief and reset battery cover according to claim 1, characterized in that: In the thickness direction of the main body, the spacing distance between the connecting body and the exhaust hole is not less than the deformation amount of the elastic filling part.

7. The automatic pressure relief and reset battery cover according to claim 1, characterized in that: An installation step is arranged outside the exhaust hole, and an edge of the connecting body is embedded in the main body and supported and connected to the installation step.

8. The automatic pressure relief and reset battery cover according to claim 1, characterized in that: The body further comprises a pole connection assembly, which is spaced apart from at least one of the exhaust holes; the pole connection assembly is provided with two pole mounting holes, which are spaced apart along the length direction of the body.

9. A secondary battery, characterized in that: The invention comprises the automatic pressure relief and reset battery cover as claimed in any one of claims 1 to 8.

10. An electrical equipment, characterized in that: Comprising at least one secondary battery according to claim 9.

Images