Battery cap exhaust structure

Abstract

The utility model provides a battery cap exhaust structure, which relates to the technical field of battery caps and comprises a cap body. According to the utility model, after the battery cap and the battery are assembled and a battery cell is charged and formed, a hard needle-shaped object is used for pushing the mounting block in an abutting manner through the second air hole, and under the action of external force, the pushing block overcomes the elastic force of the spring and drives the piston to move to the inner bottom of the hollow column, so that the inside of the battery is communicated with the outside; and when a spring is reset and a fixed block and an outer circular block are pulled, two guide rods push a pushing block above, so that the pushing block drives a piston to reset and a plurality of first air holes are blocked, and the problem that in the background technology, the battery is directly sealed by a battery cap, so that the service life of the battery is prolonged is solved. And a large amount of gas generated by decomposition in the battery is difficult to be discharged out of the battery, and part of gas generated by decomposition of an electrolyte continuously reacts with the electrolyte, so that the stability in the battery is relatively poor.

Description

Technical Field

[0001] The utility model relates to the technical field of battery caps, in particular to an exhaust structure for a battery cap. Background Art

[0002] A battery cap is a top cover arranged on the top of a battery. The battery cap can play the roles of sealing the battery, acting as a safety valve and acting as a positive conductive terminal. The battery cap is widely used in the battery manufacturing fields such as alkaline batteries, lead-acid batteries and lithium batteries.

[0003] In the prior art, after the electrolyte is injected into the battery, the battery cap directly seals the battery. After the battery is manufactured, the battery needs to be formed to be activated so that the battery can be used normally. However, during the forming process of the battery, a large amount of gas is generated by the decomposition of the electrolyte in the battery. Since the battery cap directly seals the battery, it is difficult for the large amount of gas generated by the decomposition of the electrolyte to be discharged outside the battery, and some of the gas generated by the decomposition of the electrolyte will continue to react with the electrolyte, resulting in poor stability inside the battery. Therefore, a new exhaust structure for a battery cap is needed. Summary of the Utility Model

[0004] The utility model mainly provides an exhaust structure for a battery cap that is convenient for discharging the gas inside the battery and avoiding the influence on the battery stability caused by the inability to discharge the gas.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: An exhaust structure for a battery cap includes a cap body, a positive electrode column is arranged at the center of the top of the cap body, and mounting holes are symmetrically opened near the center of the top of the cap body; an exhaust component, the exhaust component is set in two groups, and the two groups of exhaust components are respectively arranged inside the two mounting holes. The exhaust component includes a hollow column, a plurality of first air holes are uniformly opened on the outer surface of the hollow column, the outer surface of the hollow column near the top is fixedly connected with the inner surface of the mounting hole, a pushing block is slidably connected to the inner surface of the hollow column, guide rods are symmetrically fixedly connected to the bottom of the pushing block, and outer round blocks are fixedly connected to the bottoms of the two guide rods, and a fixing block is fixedly connected between the two outer round blocks.

[0006] A fixing seat is fixedly connected to the center of the bottom of the hollow column, and a spring is fixedly connected between the fixing seat and the fixing block, which is convenient for the pushing block to reset under the elastic reset action of the spring after the gas exhaust inside the battery is completed, so as to seal the inside of the battery.

[0007] An installation block is fixedly connected to the top of the pushing block, and a piston is arranged on the outer surface of the installation block, which is convenient for arranging the piston on the surface of the protruding installation block and fixing it on the top of the pushing block.

[0008] The outer surface of the piston fits with the inner surface of the hollow column. The piston and the hollow column are provided in a matching manner, which is convenient for the piston to fit inside the hollow column, playing a sealing role to prevent external gas from entering the battery after the exhaust is completed.

[0009] The top of the hollow column is fixedly connected to the top plate. A plurality of second air holes are evenly opened on the top of the top plate, which is convenient for shielding the top of the hollow column to prevent sundries from entering the hollow column and causing blockage.

[0010] The outer surface of the top plate fits with the inner surface of the mounting hole, and the top of the top plate and the top of the cap body are on the same plane, which is convenient for making the top plate flush with the top of the cap body to avoid the protrusion of the exhaust structure.

[0011] The first air hole is located at the central position of the outer surface of the hollow column, and the outer surface of the guide rod slides through the bottom of the hollow column, which is convenient for playing a limiting and guiding role when the guide rod slides on the inner wall of the hollow column to prevent the pushing block from shifting.

[0012] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0013] 1. In the present utility model, after the battery cap and the battery are assembled and the battery core is charged and formed, a hard needle-like object is used to push against the mounting block through the second air hole. Under the action of external force, the pushing block overcomes the elastic force of the spring, and the pushing block drives the piston to move to the inner bottom of the hollow column, making the inside of the battery communicate with the outside, facilitating the rapid discharge of the gas decomposed from the electrolyte inside the battery. And when the spring resets, it pulls the fixed block and the outer circular block, so that the two guide rods push the upper pushing block, making it drive the piston to reset and block the plurality of first air holes, solving the problem in the background technology that the battery cap directly seals the battery, and a large amount of gas decomposed inside the battery is difficult to be discharged to the outside of the battery, and some of the gas decomposed from the electrolyte will continue to react with the electrolyte, resulting in poor stability inside the battery.

[0014] 2. In the present utility model, by fixedly connecting the top plate to the top of the hollow column and evenly opening a plurality of second air holes on the top of the top plate, it plays a role in shielding the top of the hollow column to prevent sundries from entering the inside of the hollow column and causing blockage inside it, thereby affecting the movement of the pushing block inside the hollow column, and has high practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of an exhaust structure of a battery cap proposed by the present utility model;

[0016] Figure 2 is a bottom view of an exhaust structure of a battery cap proposed by the present utility model;

[0017] Figure 3The structural schematic diagram of an exhaust component of an exhaust structure of a battery cap is proposed by the present utility model;

[0018] Figure 4 The structural schematic diagram of a hollow column of an exhaust structure of a battery cap is proposed by the present utility model;

[0019] Figure 5 The structural schematic diagram of a push block of an exhaust structure of a battery cap is proposed by the present utility model.

[0020] Legend: 1. Cap main body; 2. Exhaust component; 201. Hollow column; 202. First air hole; 203. Push block; 204. Piston; 205. Installation block; 206. Guide rod; 207. Outer circular block; 208. Fixed block; 209. Spring; 210. Fixed seat; 211. Top plate; 212. Second air hole; 3. Positive electrode column; 4. Installation hole. Specific embodiments

[0021] In order to more clearly understand the above objects, features and advantages of the present utility model, the following further describes the present utility model with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the following description, many specific details are set forth to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0023] Please refer to Figures 1-5 , the present utility model provides a technical solution: an exhaust structure of a battery cap, including a cap main body 1, a positive electrode column 3 is arranged at the center of the top of the cap main body 1, and installation holes 4 are symmetrically opened near the center of the top of the cap main body 1; an exhaust component 2, two groups of exhaust components 2 are provided, and the two groups of exhaust components 2 are respectively arranged inside the two installation holes 4. The exhaust component 2 includes a hollow column 201, a plurality of first air holes 202 are evenly opened on the outer surface of the hollow column 201, the outer surface of the hollow column 201 near the top is fixedly connected to the inner surface of the installation hole 4, a push block 203 is slidably connected to the inner surface of the hollow column 201, guide rods 206 are symmetrically fixedly connected to the bottom of the push block 203, and outer circular blocks 207 are fixedly connected to the bottoms of the two guide rods 206, and a fixed block 208 is fixedly connected between the two outer circular blocks 207.

[0024] Such as Figures 3-4As shown, a fixing seat 210 is fixedly connected to the center of the bottom of the hollow column 201. A spring 209 is fixedly connected between the fixing seat 210 and the fixing block 208. After the air exhaust inside the battery is completed, under the elastic reset of the spring 209, the pushing block 203 is reset to seal the inside of the battery.

[0025] As Figure 3 and Figure 5 shown, an installation block 205 is fixedly connected to the top of the pushing block 203. A piston 204 is arranged on the outer surface of the installation block 205, which is convenient for arranging the piston 204 on the surface of the protruding installation block 205 and fixing it to the top of the pushing block 203.

[0026] As Figure 3 and Figure 5 shown, the outer surface of the piston 204 fits with the inner surface of the hollow column 201. The piston 204 and the hollow column 201 are set in a matching way, which is convenient for the piston 204 to fit the inner side of the hollow column 201 to play a sealing role and prevent external gas from entering the battery after the air exhaust is completed.

[0027] As Figure 3 shown, a top plate 211 is fixedly connected to the top of the hollow column 201. A plurality of second air holes 212 are evenly opened on the top of the top plate 211, which is convenient for shielding the top of the hollow column 201 to prevent sundries from entering the hollow column 201 and causing blockage.

[0028] As Figure 1 and Figure 2 shown, the outer surface of the top plate 211 fits with the inner surface of the installation hole 4. The top of the top plate 211 and the top of the cap body 1 are on the same plane, which is convenient for making the top of the top plate 211 flush with the top of the cap body 1 to avoid the protrusion of the air exhaust structure.

[0029] As Figures 3-5 shown, the first air hole 202 is located at the center of the outer surface of the hollow column 201. The outer surface of the guide rod 206 slidably penetrates the bottom of the hollow column 201, which is convenient for playing a limiting and guiding role when the guide rod 206 slides in the inner wall of the hollow column 201 to prevent the pushing block 203 from shifting.

[0030] The method of use and working principle of this device are as follows: when in use, the battery cap is connected to the battery body to seal the inside of the battery. After the battery cell is charged, the internal electrolyte decomposes to produce a large amount of gas that accumulates between the battery shell and the cap body 1. A hard needle is used to insert into any second air hole 212, so that it contacts the top of the mounting block 205 and pushes it. Under the action of external force, the pushing block 203 moves downward on the inner side of the hollow column 201, and the two guide rods 206 drive the two outer circular blocks 207 and the fixed block 208 to move downward synchronously. The spring 209 fixed between the fixed block 208 and the fixing seat 210 is deformed and elongated under the force, so that the pushing block 203 drives the piston 204 to move to the inner bottom of the hollow column 201. At this time, multiple first air holes 202 are connected with the upper space of the hollow column 201, and gas is generated in the battery. Under the action of pressure, the gas will enter the hollow column 201 from the multiple first air holes 202 and be discharged to the external environment from the multiple second air holes 212. After the needle-shaped object is removed, the spring 209 contracts under the action of elastic reset and pulls the fixed block 208, so that the outer circular blocks 207 fixed on both sides thereof will synchronously push the two guide rods 206, driving the pushing block 203 to move up and reset. After reset, the piston 204 fits tightly with the inner surface of the hollow column 201, blocking the multiple first air holes 202 and preventing external gas from entering the battery. This solves the problem in the background technology that the battery cap directly seals the battery, a large amount of gas generated by the decomposition of the battery is difficult to be discharged outside the battery, and some of the gas generated by the decomposition of the electrolyte will continue to react with the electrolyte, thereby resulting in poor stability inside the battery.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A battery cap exhaust structure, comprising a cap body (1), characterized in that: A positive pole (3) is provided at the center of the top of the cap body (1), and a mounting hole (4) is symmetrically provided near the center of the top of the cap body (1); An exhaust assembly (2), wherein the exhaust assembly (2) is provided in two groups, and the two groups of the exhaust assembly (2) are respectively arranged inside two mounting holes (4), the exhaust assembly (2) comprises a hollow column (201), a plurality of first air holes (202) are evenly provided on the outer surface of the hollow column (201), a position near the top of the outer surface of the hollow column (201) is fixedly connected to the inner surface of the mounting hole (4), the inner surface of the hollow column (201) is slidably connected to a push block (203), the bottom of the push block (203) is symmetrically fixedly connected to a guide rod (206), the bottoms of the two guide rods (206) are fixedly connected to an outer circular block (207), and a fixing block (208) is fixedly connected between the two outer circular blocks (207).

2. The battery cap venting structure according to claim 1, characterized in that: The center of the bottom of the hollow column (201) is fixedly connected to a fixing seat (210), and a spring (209) is fixedly connected between the fixing seat (210) and the fixing block (208).

3. The battery cap venting structure according to claim 1, characterized in that: The top of the pushing block (203) is fixedly connected to the mounting block (205), and a piston (204) is provided on the outer surface of the mounting block (205).

4. The battery cap venting structure according to claim 3, characterized in that: The outer surface of the piston (204) is in contact with the inner surface of the hollow column (201), and the piston (204) and the hollow column (201) are arranged in a matching manner.

5. The battery cap venting structure according to claim 1, characterized in that: The top of the hollow column (201) is fixedly connected to a top plate (211), and a plurality of second air holes (212) are evenly arranged on the top of the top plate (211).

6. The battery cap venting structure according to claim 5, characterized in that: The outer surface of the top plate (211) is in contact with the inner surface of the mounting hole (4), and the top of the top plate (211) and the top of the cap body (1) are in the same plane.

7. The battery cap venting structure according to claim 1, characterized in that: The first air hole (202) is located at the center of the outer surface of the hollow column (201), and the outer surface of the guide rod (206) slides through the bottom of the hollow column (201).

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