High-safety battery cover plate structure

Abstract

The utility model relates to the technical field of cover plate structures, and discloses a high-safety battery cover plate structure which comprises a cover plate main body, an anti-explosion valve is fixedly connected to the outer surface of one side of the cover plate main body, a valve port is fixedly formed in the position, close to the center, of the top of the anti-explosion valve, and a positive plate is fixedly connected to the position, close to the center, of the top of the cover plate main body in a penetrating mode. The bottom of the positive plate is fixedly provided with a pole, the bottom of the pole is fixedly connected with a confluence piece, the confluence piece comprises a connecting piece, one side of the connecting piece is fixedly connected with an anti-explosion structure, one side of the anti-explosion structure is fixedly connected with a welding core wrapping tab structure, and the top of the connecting piece is connected with the bottom of the pole in a spot welding mode. The utility model solves the problems that the existing cover plate has defects, the internal pressure is increased, the pressure is released by opening an explosion-proof valve, but after the pressure is released, the battery still can be normally charged and discharged, a current loop is not cut off, the battery still works and still continues to react, and the safety problem still exists.

Description

Technical Field

[0001] The utility model relates to the technical field of cover plate structures, in particular to a high-safety battery cover plate structure. Background Art

[0002] A battery is a device that converts chemical energy into electrical energy. It contains an electrolyte solution and metal electrodes to generate an electric current. A battery has both positive and negative electrodes. With technological advancements, batteries generally refer to small devices that generate electrical energy, such as solar cells. Battery performance parameters primarily include electromotive force, capacity, specific energy, and resistance. Existing cover structures are equipped with explosion-proof valves for safety. When the abnormal internal pressure of the battery continues to increase and reaches the valve's set value, the valve opens to release pressure, preventing explosion and ensuring battery safety.

[0003] However, the traditional cover has shortcomings. When the internal pressure increases, the explosion-proof valve is opened to release the pressure. However, after the pressure is released, the battery can still charge and discharge normally. The current circuit is not cut off. The battery is still working and continuing to react, and there are still safety issues. Utility Model Content

[0004] The purpose of the present utility model is to provide a high-safety battery cover structure to solve the shortcomings of the existing cover mentioned in the above background technology. When the internal pressure increases, the explosion-proof valve opens to release the pressure. However, after the pressure is released, the battery can still charge and discharge normally, and the current circuit is not cut off. The battery is still working and continuing to react, and there is still a safety problem.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-safety battery cover structure, comprising a cover body, an explosion-proof valve fixedly connected to the outer surface of one side of the cover body, a valve port fixedly provided near the center of the top of the explosion-proof valve, a positive electrode sheet fixedly connected through the top of the cover body near the center, a pole fixedly provided at the bottom of the positive electrode sheet, a bus bar fixedly connected to the bottom of the pole, the bus bar comprising a connecting piece, one side of the connecting piece fixedly connected to an explosion-proof structure, and one side of the explosion-proof structure fixedly connected to a welded core package ear structure.

[0006] As a preferred embodiment, the top of the connecting piece is spot-welded to the bottom of the pole.

[0007] As a preferred embodiment, the explosion-proof structure is located directly below the valve port, and the explosion-proof structure is fixedly connected to the lower plastic portion of the cover body.

[0008] As a preferred embodiment, the welded core package tab structure is connected to a subsequent core package tab.

[0009] As a preferred embodiment, a first explosion-proof notch is formed in the gap between the connecting piece and the opposite side of the explosion-proof structure.

[0010] As a preferred embodiment, a second explosion-proof notch is formed in the gap between the welded core package tab structure and the opposite side of the explosion-proof structure.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] According to the utility model, when the internal pressure of the battery increases, the first explosion-proof notch and the second explosion-proof notch will be broken first, so that the internal current is disconnected and the current circuit is blocked. Then, the explosion-proof valve on the cover body releases pressure to prevent explosion, thereby making the battery doubly safe and improving the battery safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main three-dimensional structure of a high-safety battery cover structure proposed by the utility model;

[0014] Figure 2 This is a side view schematic diagram of a high-safety battery cover structure proposed by the utility model;

[0015] Figure 3 This is a top-down perspective structural diagram of a high-safety battery cover structure proposed by the utility model;

[0016] Figure 4 This utility model proposes a high-safety battery cover structure Figure 3 Schematic diagram of the three-dimensional structure at point A in the middle.

[0017] In the figure: 1. Cover plate body; 2. Explosion-proof valve; 3. Valve port; 4. Positive electrode; 5. Pole; 6. Connecting piece; 7. Explosion-proof structure; 8. Welded core package tab structure; 9. First explosion-proof notch; 10. Second explosion-proof notch; 11. Busbar. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] See also Figures 1-4The utility model provides a technical solution: a high-safety battery cover structure, including a cover body 1, an explosion-proof valve 2 is fixedly connected to the outer surface of one side of the cover body 1, and a valve port 3 is fixedly provided near the center of the top of the explosion-proof valve 2, and a positive electrode sheet 4 is fixedly connected and penetrated at the top of the cover body 1 near the center, and a pole 5 is fixedly provided at the bottom of the positive electrode sheet 4, and a bus bar 11 is fixedly connected to the bottom of the pole bar 5, and the bus bar 11 includes a connecting piece 6, one side of the connecting piece 6 is fixedly connected to an explosion-proof structure 7, and one side of the explosion-proof structure 7 is fixedly connected to a welded core package ear structure 8, and the pressure is released in the gap between the first explosion-proof notch 9 and the second explosion-proof notch 10 by air pressure, and then when the air pressure passes through, the first explosion-proof notch 9 and the second explosion-proof notch 10 will be broken, thereby disconnecting the internal current of the bus bar 11 and blocking the current circuit, and then the explosion-proof valve 2 on the cover body 1 will release the pressure to prevent explosion, thereby making the battery doubly safe.

[0021] The top of the connecting piece 6 is spot-welded to the bottom of the pole 5 . The connecting piece 6 is welded to the pole 5 , so that the device is more stable when disconnecting the busbar.

[0022] The explosion-proof structure 7 is located directly below the valve port 3, and is fixedly connected to the lower plastic portion of the cover body 1. By having the explosion-proof structure 7 directly below the valve port 3, the first explosion-proof notch 9 and the second explosion-proof notch 10 can be easily broken when the device is relieving pressure, making it easy to use the device effectively.

[0023] The welding core package tab structure 8 is connected to the subsequent core package tab. The welding core package tab structure 8 is connected to the internal core package tab, so that the internal current can be easily discharged and broken through a unique path, making the device easy to use.

[0024] A first explosion-proof notch 9 is connected to the gap between the connecting piece 6 and the opposite side of the explosion-proof structure 7, and a second explosion-proof notch 10 is connected to the gap between the welding core package tab structure 8 and the opposite side of the explosion-proof structure 7. The pressure is released inside the gap between the first explosion-proof notch 9 and the second explosion-proof notch 10 by air pressure, and then when the air pressure passes through, the first explosion-proof notch 9 and the second explosion-proof notch 10 will be broken, thereby disconnecting the internal current of the busbar 11 and blocking the current circuit.

[0025] Working principle: When the internal pressure of the battery increases, the pressure is first released inside the gap between the first explosion-proof notch 9 and the second explosion-proof notch 10 through air pressure, and then when the air pressure passes, the first explosion-proof notch 9 and the second explosion-proof notch 10 will be broken, thereby disconnecting the internal current of the busbar 11 and blocking the current circuit. Then the explosion-proof valve 2 on the cover body 1 releases pressure to prevent explosion, thereby making the battery doubly safe and improving the safe use of the battery. Further, the pressure is released through the valve port 3 of the explosion-proof valve 2, and the backflow inside the positive electrode 4 is blocked, so that the device will not pass current when it is released, thereby improving the safety of the device and further improving the use effect of the cover body 1 structure of the device.

[0026] 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 high-safety battery cover structure, comprising a cover body (1), characterized in that: An explosion-proof valve (2) is fixedly connected to the outer surface of one side of the cover plate body (1), a valve port (3) is fixedly provided near the center of the top of the explosion-proof valve (2), a positive electrode sheet (4) is fixedly connected and penetrated near the center of the top of the cover plate body (1), a pole (5) is fixedly provided at the bottom of the positive electrode sheet (4), a busbar (11) is fixedly connected to the bottom of the pole (5), the busbar (11) includes a connecting piece (6), one side of the connecting piece (6) is fixedly connected to an explosion-proof structure (7), and one side of the explosion-proof structure (7) is fixedly connected to a core package pole ear structure (8) for welding.

2. The high-safety battery cover structure according to claim 1, characterized in that: The top of the connecting piece (6) is spot-welded to the bottom of the pole (5).

3. The high-safety battery cover structure according to claim 1, characterized in that: The explosion-proof structure (7) is located directly below the valve port (3), and the explosion-proof structure (7) is fixedly connected to the lower plastic portion of the cover plate body (1).

4. The high-safety battery cover structure according to claim 1, characterized in that: The welded core package tab structure (8) is connected to the subsequent core package tab.

5. The high-safety battery cover structure according to claim 3, characterized in that: A first explosion-proof notch (9) is connected in the gap between the connecting piece (6) and the opposite side of the explosion-proof structure (7).

6. The high-safety battery cover structure according to claim 5, characterized in that: A second explosion-proof notch (10) is connected in the gap between the welded core package tab structure (8) and the opposite side of the explosion-proof structure (7).

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