Battery cap exhaust structure

Abstract

The utility model relates to the technical field of battery caps, and discloses a battery cap exhaust structure which comprises a battery top cover, a battery bottom cover is fixedly connected to the bottom of the battery top cover, exhaust holes are formed in the inner wall of the battery top cover, a fixing plate is arranged in the battery bottom cover, a sealing ring is fixedly connected to the surface of the fixing plate, and the sealing ring is fixedly connected to the surface of the fixing plate. A movable assembly is arranged at the upper end of the fixing plate and comprises a sleeve, and a limiting groove is formed in the inner wall of the sleeve. According to the utility model, the push rod is pushed to move upwards through the gas pressure inside the battery, so that the mounting plate moves upwards, the spring is extruded, the spring is compressed, the fixed plate is driven to move upwards, and the sealing ring moves upwards; the diameter of the upper surface of the battery bottom cover is larger than that of the lower surface, so that the sealing ring is not contacted with the inner wall of the battery bottom cover; and gas enters the exhaust cavity and then is exhausted through a plurality of exhaust holes, so that explosion caused by excessive internal pressure of the battery is avoided.

Description

Technical Field

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

[0002] The battery cap is an important part of the battery. It provides the battery sealing function and acts as a safety valve. The battery cap usually consists of a top cover, a safety valve and a bottom cover. The top cover is used to provide the function of the positive conductive terminal.

[0003] When the battery is in use, especially during the charging and discharging process, the electrolyte inside the battery will decompose to generate a large amount of gas. 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. When the gas pressure is too high, it is easy to cause battery damage or explosion. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides an exhaust structure of a battery cap.

[0005] The utility model is realized by the following technical solutions: an exhaust structure of a battery cap, including a battery top cover, the bottom of the battery top cover is fixedly connected with a battery bottom cover, an exhaust hole is opened on the inner wall of the battery top cover, a fixing plate is arranged inside the battery bottom cover, a sealing ring is fixedly connected to the surface of the fixing plate, and a movable component is arranged at the upper end of the fixing plate;

[0006] The movable component includes a sleeve, a limiting groove is opened on the inner wall of the sleeve, a spring is arranged inside the sleeve, the bottom of the spring is fixedly connected with a mounting plate, and the bottom of the mounting plate is fixedly connected with a push rod.

[0007] Through the above technical solutions, the push rod is pushed upward by the gas pressure inside the battery, so that the mounting plate moves upward, compresses the spring, the spring is compressed, drives the fixing plate to move upward, and the sealing ring moves upward. Since the diameter of the upper part of the battery bottom cover is larger than that of the lower part, the sealing ring does not contact the inner wall of the battery bottom cover, so that the gas enters the inside of the exhaust cavity and is then discharged through a plurality of exhaust holes, avoiding explosion due to excessive internal pressure of the battery and improving the safety during use.

[0008] As a further improvement of the above solution, the number of the exhaust holes is set to be several, and several exhaust holes are arranged in a circumferential distribution with the battery top cover as the center.

[0009] Through the above technical solutions, through a plurality of exhaust holes, it is ensured that the gas can be discharged evenly and quickly, thereby improving the exhaust efficiency, reducing the explosion or damage of the battery caused by excessive air pressure, and improving the safety of use.

[0010] As a further improvement of the above solution, the top of the sleeve is fixedly connected to the inner top wall of the battery top cover, and the top of the spring is fixedly connected to the inner top wall of the battery top cover.

[0011] Through the above technical solution, the elastic reset of the spring pushes the mounting plate downward, causing the push rod to move downward, and the fixed plate to move downward, making the sealing ring contact the inner wall of the battery bottom cover, thereby achieving sealing, realizing automatic exhaust, and improving practicability.

[0012] As a further improvement of the above solution, both ends of the mounting plate are slidably connected to the inner wall of the limiting groove.

[0013] Through the above technical solution, the two ends of the mounting plate are limited by the limiting groove, so that the push rod will not deviate when moving, thereby improving the stability of the push rod when moving.

[0014] As a further improvement of the above solution, the bottom of the push rod extends to the outside of the sleeve and is fixedly connected to the top of the fixed plate.

[0015] Through the above technical solution, when the push rod moves, it will drive the fixed plate to move, causing the sealing ring to move, achieving sealing and exhaust, and improving the convenience during use.

[0016] As a further improvement of the above solution, a limiting plate is fixedly connected to the inner wall of the battery bottom cover, and an exhaust cavity is provided inside the battery bottom cover.

[0017] Through the above technical solution, the limiting plate ensures the correct position of the sealing ring when it is subjected to the force of the push rod, avoiding the deviation or detachment of the sealing ring.

[0018] As a further improvement of the above solution, the top of the limiting plate contacts the bottom of the sealing ring, and the surface of the sealing ring contacts the inner wall of the battery bottom cover.

[0019] Through the above technical solution, the sealing of the battery bottom cover is achieved by the contact between the sealing ring and the inner wall of the battery bottom cover.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] The utility model realizes automatic exhaust and improves practicability by setting a fixed plate, a sealing ring and a movable component. Specifically, when excessive gas is generated during battery use, the gas pressure pushes the push rod to move upward, causing the mounting plate to move upward, compressing the spring, driving the fixed plate to move upward, and making the sealing ring move upward. Since the diameter of the upper part of the battery bottom cover is larger than that of the lower part, the sealing ring does not contact the inner wall of the battery bottom cover, allowing gas to enter the interior of the exhaust cavity and then be discharged through a plurality of exhaust holes, avoiding explosion due to excessive internal pressure of the battery and improving safety during use. When the internal pressure of the battery decreases, the elastic reset of the spring pushes the mounting plate to move downward, causing the push rod to move downward, making the fixed plate move downward and the sealing ring contact the inner wall of the battery bottom cover, thereby realizing sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 is a schematic sectional view of the overall structure of the utility model;

[0024] Figure 3 is an exploded view of the movable component of the utility model;

[0025] Figure 4 is a schematic diagram of the internal structure of the battery bottom cover of the utility model;

[0026] Figure 5 is a schematic diagram of the movement structure of the fixed plate of the utility model.

[0027] MAIN SYMBOL DESCRIPTION:

[0028] 1. Battery top cover; 2. Battery bottom cover; 3. Exhaust hole; 4. Fixed plate; 5. Sealing ring; 6. Movable component; 601. Sleeve; 602. Limiting groove; 603. Spring; 604. Mounting plate; 605. Push rod; 7. Limiting plate; 8. Exhaust cavity. SPECIFIC EMBODIMENTS

[0029] Next, in combination with the drawings and specific embodiments, the utility model will be further described. It should be noted that on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0030] Embodiment:

[0031] Please refer to Figures 1-5, An exhaust structure for a battery cap in this embodiment includes a battery top cover 1. A battery bottom cover 2 is fixedly connected to the bottom of the battery top cover 1. An exhaust hole 3 is provided on the inner wall of the battery top cover 1. A fixing plate 4 is arranged inside the battery bottom cover 2. A sealing ring 5 is fixedly connected to the surface of the fixing plate 4. An active component 6 is arranged above the fixing plate 4;

[0032] The active component 6 includes a sleeve 601. A limiting groove 602 is provided on the inner wall of the sleeve 601. A spring 603 is arranged inside the sleeve 601. The bottom of the spring 603 is fixedly connected to a mounting plate 604. The bottom of the mounting plate 604 is fixedly connected to a push rod 605. When excessive gas is generated during battery use, the gas pressure pushes the push rod 605 upward, causing the mounting plate 604 to move upward, compressing the spring 603, driving the fixing plate 4 to move upward, and causing the sealing ring 5 to move upward. Since the diameter of the upper part of the battery bottom cover 2 is larger than that of the lower part, the sealing ring 5 does not contact the inner wall of the battery bottom cover 2, allowing gas to enter the interior of the exhaust cavity 8 and then be discharged through a plurality of exhaust holes 3, preventing the battery from exploding due to excessive internal pressure and improving safety during use. When the internal pressure of the battery decreases, the spring 603 elastically resets to push the mounting plate 604 downward, causing the push rod 605 to move downward, the fixing plate 4 to move downward, and the sealing ring 5 to contact the inner wall of the battery bottom cover 2, thereby achieving sealing and automatic exhaust, improving practicality.

[0033] A plurality of exhaust holes 3 are provided. The plurality of exhaust holes 3 are circumferentially distributed around the battery top cover 1. The plurality of exhaust holes 3 improve the exhaust efficiency, thereby reducing the risk of excessive pressure and improving safety during use.

[0034] The top of the sleeve 601 is fixedly connected to the inner top wall of the battery top cover 1. The top of the spring 603 is fixedly connected to the inner top wall of the battery top cover 1.

[0035] Both ends of the mounting plate 604 are slidably connected to the inner wall of the limiting groove 602.

[0036] The bottom of the push rod 605 extends outside the sleeve 601 and is fixedly connected to the top of the fixing plate 4.

[0037] A limiting plate 7 is fixedly connected to the inner wall of the battery bottom cover 2. An exhaust cavity 8 is arranged inside the battery bottom cover 2.

[0038] The top of the limiting plate 7 contacts the bottom of the sealing ring 5. The surface of the sealing ring 5 contacts the inner wall of the battery bottom cover 2. The position of the sealing ring 5 is limited by the limiting plate 7.

[0039] The implementation principle of an exhaust structure for a battery cap in an embodiment of the present application is as follows: During use, the battery bottom cover 2 is fixedly installed with the battery. When excessive gas is generated during battery use, the gas pressure pushes the push rod 605 to move upward, causing the mounting plate 604 to move upward, squeezing the spring 603, so that the spring 603 is compressed, driving the fixing plate 4 to move upward, causing the sealing ring 5 to move upward. Since the diameter of the upper part of the battery bottom cover 2 is larger than that of the lower part, the sealing ring 5 does not contact the inner wall of the battery bottom cover 2, allowing gas to enter the interior of the exhaust cavity 8 and then be discharged through a plurality of exhaust holes 3, avoiding explosion due to excessive internal pressure of the battery and improving safety during use. When the internal pressure of the battery decreases, the elastic reset of the spring 603 pushes the mounting plate 604 to move downward, causing the push rod 605 to move downward, causing the fixing plate 4 to move downward so that the sealing ring 5 contacts the inner wall of the battery bottom cover 2, thereby achieving sealing and realizing automatic exhaust, improving practicability.

[0040] The above-mentioned implementation manners are only the preferred implementation manners of the present utility model and cannot be used to limit the scope of protection of the present utility model. Any non-substantive changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. A battery cap exhaust structure, characterized in that: The battery top cover (1) comprises a battery bottom cover (2) fixedly connected to the bottom of the battery top cover (1), an exhaust hole (3) is provided on the inner wall of the battery top cover (1), a fixing plate (4) is provided inside the battery bottom cover (2), a sealing ring (5) is fixedly connected to the surface of the fixing plate (4), and a movable component (6) is provided at the upper end of the fixing plate (4); The movable component (6) comprises a sleeve (601), the inner wall of the sleeve (601) is provided with a limiting groove (602), a spring (603) is arranged inside the sleeve (601), the bottom of the spring (603) is fixedly connected to a mounting plate (604), and the bottom of the mounting plate (604) is fixedly connected to a push rod (605).

2. A battery cap venting structure as claimed in claim 1, characterized in that: The exhaust holes (3) are provided in a plurality, and the plurality of exhaust holes (3) are distributed around the battery top cover (1) in a circular manner.

3. A battery cap venting structure as claimed in claim 1, characterized in that: The top of the sleeve (601) is fixedly connected to the inner top wall of the battery top cover (1), and the top of the spring (603) is fixedly connected to the inner top wall of the battery top cover (1).

4. A battery cap venting structure as claimed in claim 1, characterized in that: Both ends of the mounting plate (604) are slidably connected to the inner wall of the limiting groove (602).

5. A battery cap venting structure as claimed in claim 1, characterized in that: The bottom of the push rod (605) extends to the outside of the sleeve (601) and is fixedly connected to the top of the fixing plate (4).

6. A battery cap venting structure as claimed in claim 1, characterized in that: The inner wall of the battery bottom cover (2) is fixedly connected to a limit plate (7), and an exhaust cavity (8) is provided inside the battery bottom cover (2).

7. A battery cap venting structure as claimed in claim 6, characterized in that: The top of the limiting plate (7) contacts the bottom of the sealing ring (5), and the surface of the sealing ring (5) contacts the inner wall of the battery bottom cover (2).

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