Lithium battery cover plate

Abstract

The utility model relates to the technical field of batteries, and discloses a lithium battery cover plate which comprises a base plate, a positive pole and a negative pole are symmetrically arranged on the two sides of the base plate, an anti-explosion valve is arranged in the middle of the base plate, a connecting plate is fixedly connected to the bottom face of the base plate, a liquid leakage cavity is formed in the connecting plate, and a liquid leakage conical opening is formed in the liquid leakage cavity. A waterproof film is arranged at an opening of the liquid leakage conical opening and is similar to a heart valve, observation openings are formed in the positions, on the two sides of the anti-explosion valve, of the base plate, transparent cover plates are fixedly connected into the observation openings, and PH test paper is fixedly connected to the lower portions of the transparent cover plates. By arranging the liquid leakage conical opening and the waterproof film, leaked liquid of the battery enters the liquid leakage cavity from the waterproof film, the waterproof film can prevent the leaked liquid from flowing back, and the stability of the battery is guaranteed; and by arranging the PH test paper and the transparent cover plate, when the color of the PH test paper is changed due to liquid leakage, a worker can observe and timely respond, so that dangerous situations are avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a lithium battery cover. Background Technology

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloys as positive / negative electrode materials and a non-aqueous electrolyte solution. The lithium-ion battery cover plays a crucial role in the assembly process. A lithium-ion battery cover is a plate-like material used to cover the lithium-ion battery. It is typically used to wrap and protect the battery casing, and is fixed to the battery casing using methods such as laser welding. It wraps and secures the bare battery cells, achieving a sealing effect, preventing external substances from entering the battery, and ensuring the normal operation of the battery.

[0003] Patent CN211182356U discloses a lithium battery cover plate, including a cover plate body. Symmetrically distributed positive and negative electrode bases are arranged on one side surface of the cover plate body, and conductive sheets are arranged on the other side surface. A positive electrode post is arranged on the positive electrode base, and a negative electrode post is arranged on the negative electrode base. An explosion-proof valve is provided on the cover plate body. Several leakage return chambers are provided on the cover plate body, each chamber being elongated and located on one side of the conductive sheets. Several fastening bolts and threaded holes are also provided on the cover plate body, with the fastening bolts and threaded holes connected by a threaded engagement. This invention, by designing several leakage return chambers within the cover plate body, can effectively accommodate a certain amount of leakage, avoiding the problem of battery leakage accumulating inside the battery assembly, alleviating excessive leakage, and preventing environmental pollution and injury to personnel.

[0004] Although the above-mentioned device can effectively contain a certain amount of leakage, it still has the following shortcomings:

[0005] While the aforementioned cover prevents battery liquid from accumulating inside the battery assembly, it does not transmit information about liquid leaks to staff. Staff can only detect leaks when the cover is opened, making the process complicated. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a lithium battery cover that can collect leaked liquid when the battery leaks, while allowing staff to observe whether there is leakage without opening the cover.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery cover plate, comprising a substrate, on which positive and negative electrode posts are symmetrically arranged on both sides, and an explosion-proof valve is provided in the middle of the substrate. Conductive plates are fixedly connected to the bottom surfaces of the positive and negative electrode posts, and a connecting plate is fixedly connected to the bottom surface of the substrate. The connecting plate has a leakage cavity, and a channel post for the positive and negative electrode posts to pass through is provided on the leakage cavity. A partition for the explosion-proof valve to pass through is provided on the leakage cavity, and a leakage cone is provided on the leakage cavity. A waterproof membrane, similar to a heart valve, is provided at the opening of the leakage cone. Observation ports are provided on both sides of the explosion-proof valve on the substrate. A transparent cover plate is fixedly connected inside the observation port, and a pH test strip is fixedly connected below the transparent cover plate, with the pH test strip hanging down to the top surface of the leakage cavity.

[0008] Furthermore, a waterproof membrane is installed at both the upper and lower openings of the leakage cone.

[0009] Furthermore, the positive and negative terminals are fixed by a fixing plate on the upper surface of the substrate.

[0010] Furthermore, the substrate has a test strip slot for placing test strips at the transparent cover plate.

[0011] Furthermore, the connecting plate and the base plate are connected by fastening bolts, and the leakage cavity is provided with bolt posts for the fastening bolts to pass through.

[0012] Furthermore, the positive and negative terminals are provided with terminal sealing rings at the conductive plate, and the fastening bolts are provided with bolt sealing rings on the top surface of the substrate.

[0013] Furthermore, a cover sealing ring is provided around the base plate and the connecting plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By incorporating a leakage cone and a waterproof membrane into the connecting plate, when leakage occurs, the leaking liquid is forced through the membrane into the leakage chamber by the internal pressure of the battery. The membrane's valve-like structure prevents backflow, ensuring battery stability. Furthermore, a pH test strip is placed within the leakage chamber; its color changes upon entering the chamber. Combined with a transparent cover on the substrate, this allows staff to observe the leakage and react promptly, preventing dangerous situations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the present invention after being disassembled as a whole;

[0018] Figure 3 This is a three-dimensional structural diagram of the connecting plate of this utility model after disassembly;

[0019] Figure 4 This is a three-dimensional structural diagram of the leakage cone and waterproof membrane of this utility model.

[0020] In the diagram: 1. Substrate; 2. Positive electrode post; 3. Negative electrode post; 4. Explosion-proof valve; 5. Conductive plate; 6. Connecting plate; 7. Leakage chamber; 8. Channel post; 9. Separator; 10. Leakage cone; 11. Waterproof membrane; 12. Observation port; 13. Transparent cover; 14. pH test paper; 15. Fixing plate; 16. Test paper trough; 17. Fastening bolt; 18. Bolt post; 19. Electrode post sealing ring; 20. Bolt sealing ring; 21. Cover sealing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] like Figures 1 to 3 As shown, a lithium battery cover includes a substrate 1. Positive electrode posts 2 and negative electrode posts 3 are symmetrically arranged on both sides of the substrate 1. An explosion-proof valve 4 is located in the middle of the substrate 1. Conductive plates 5 are fixedly connected to the bottom surfaces of the positive electrode posts 2 and negative electrode posts 3. A connecting plate 6 is fixedly connected to the bottom surface of the substrate 1. The connecting plate 6 has a leakage cavity 7. A channel post 8 for the passage of the positive electrode posts 2 and negative electrode posts 3 is provided on the leakage cavity 7. A partition 9 for the passage of the explosion-proof valve 4 is provided on the leakage cavity 7. A leakage cone 10 is provided on the leakage cavity 7. A waterproof membrane 11, similar to a heart valve, is provided at the opening of the leakage cone 10. Observation ports 12 are provided on both sides of the explosion-proof valve 4 on the substrate 1. A transparent cover plate 13 is fixedly connected inside the observation port 12. A pH test strip 14 is fixedly connected below the transparent cover plate 13 and hangs down to the bottom surface of the leakage cavity 7.

[0023] like Figure 1 As shown, the lithium battery cover in this utility model is similar in structure to existing lithium battery cover designs. For example, patent CN211182356U discloses a lithium battery cover. The main improvement of this utility model is that it can collect the leaking liquid when the battery leaks, and at the same time, it allows the operator to observe whether there is a leak without opening the cover. Figures 1 to 3As shown, in this utility model, a lithium battery cover is installed on the battery during use. The leakage chamber 7 inside the cover collects any leakage that may occur during battery use. When the pressure inside the battery is too high and leakage occurs, the leakage will enter the sealed leakage chamber 7 through the leakage cone 10 and the waterproof membrane 11, preventing the cover from being pushed open by the excessive pressure and causing leakage. When leakage occurs and enters the leakage chamber 7, the leakage will react with the pH test paper 14, causing the pH test paper 14 to change color. This phenomenon can be observed by the staff through the transparent cover 13, allowing them to react in time and avoid dangerous situations.

[0024] like Figure 3 and Figure 4 As shown, the waterproof membrane 11 is provided at both the upper and lower openings of the leakage cone 10. This design can effectively prevent liquid inside the battery from flowing into the leakage chamber 7 at will.

[0025] like Figure 1 and Figure 2 As shown, the positive electrode post 2 and the negative electrode post 3 are fixed by the fixing plate 15 on the upper surface of the substrate 1, thereby preventing the liquid in the battery from leaking due to the shaking of the positive electrode post 2 and the negative electrode post 3.

[0026] like Figure 2 and Figure 3 As shown, the substrate 1 has a test strip slot 16 for placing test strips at the transparent cover plate 13. The test strip slot 16 can display the pH test strip 14 parallel at the transparent cover plate 13, preventing the pH test strip 14 from being bent and causing blurred observation.

[0027] like Figures 1 to 3 As shown, the connecting plate 6 and the base plate 1 are connected by fastening bolts 17. The leakage cavity 7 is provided with bolt posts 18 for the fastening bolts 17 to pass through. The bolt connection can better fix the connecting plate 6 and the base plate 1, and the bolt posts 18 can prevent leakage from the fastening bolts 17.

[0028] like Figures 1 to 3 As shown, the positive electrode post 2 and the negative electrode post 3 are provided with electrode post sealing rings 19 at the conductive plate 5, the fastening bolt 17 is provided with bolt sealing rings 20 on the top surface of the substrate 1, and the substrate 1 and the connecting plate 6 are provided with cover plate sealing rings 21. The sealing rings can better prevent liquid leakage from the structure.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lithium battery cover plate, comprising a substrate (1), on which positive electrode posts (2) and negative electrode posts (3) are symmetrically arranged on both sides, and an explosion-proof valve (4) is disposed in the middle of the substrate (1), and a conductive plate (5) is fixedly connected to the bottom surface of the positive electrode posts (2) and the negative electrode posts (3), characterized in that, A connecting plate (6) is fixedly connected to the bottom surface of the substrate (1). The connecting plate (6) has a leakage cavity (7). A channel column (8) for passing through the positive electrode post (2) and the negative electrode post (3) is provided on the leakage cavity (7). A partition (9) for the explosion-proof valve (4) to pass through is provided on the leakage cavity (7). A leakage cone (10) is provided on the leakage cavity (7). A waterproof membrane (11) is provided at the opening of the leakage cone (10). The waterproof membrane (11) is similar to a heart valve. An observation port (12) is provided on both sides of the explosion-proof valve (4) on the substrate (1). A transparent cover plate (13) is fixedly connected inside the observation port (12). A pH test paper (14) is fixedly connected below the transparent cover plate (13). The pH test paper (14) hangs down to the bottom surface of the leakage cavity (7).

2. A lithium battery cover plate according to claim 1, characterized in that, The waterproof membrane (11) is provided at both the upper and lower openings of the leakage cone (10).

3. A lithium battery cover plate according to claim 1, characterized in that, The positive electrode post (2) and the negative electrode post (3) are fixed by a fixing plate (15) on the upper surface of the substrate (1).

4. A lithium battery cover plate according to claim 1, characterized in that, The substrate (1) has a test paper slot (16) for placing test paper at the transparent cover plate (13).

5. A lithium battery cover plate according to claim 1, characterized in that, The connecting plate (6) and the base plate (1) are connected by fastening bolts (17), and the leakage cavity (7) is provided with bolt posts (18) for the fastening bolts (17) to pass through.

6. A lithium battery cover plate according to claim 1, characterized in that, The positive electrode post (2) and the negative electrode post (3) are provided with electrode post sealing rings (19) at the conductive plate (5), and the fastening bolt (17) is provided with bolt sealing rings (20) on the top surface of the substrate (1).

7. A lithium battery cover plate according to claim 1, characterized in that, A cover sealing ring (21) is provided around the substrate (1) and the connecting plate (6).

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