Power battery cover plate

Abstract

The utility model relates to the technical field of battery cover plates, and discloses a power battery cover plate which comprises a cover plate body, an insulating plate is arranged at the bottom of the cover plate body, an inner groove is formed in the inner wall of the insulating plate, the inner wall of the cover plate body is connected with an anti-explosion valve, a valve hole is formed in the inner wall of the anti-explosion valve, and the valve hole is communicated with the inner groove. The outer wall of the insulating plate is provided with a mounting block, the outer wall of the cover plate body is connected with a butt joint column, the top of the cover plate body is provided with an upper insulating part, the inner wall of the upper insulating part is sleeved with a pole unit, the bottom of the insulating plate is provided with a conductive base block, and the top of the conductive base block is provided with a conductive column. According to the power battery cover plate, the plug, the liquid conveying groove, the valve element and the compression spring on the power battery cover plate are matched for use, so that the valve element on the power battery cover plate cannot block the inner cavity of the liquid conveying groove in a one-way mode, and then electrolyte can enter the power battery cover plate through the liquid conveying groove and the inner cavity of the liquid conveying groove.

Description

Technical Field

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

[0002] Battery cover plates and their power batteries play a crucial role in the field of new energy vehicles. As an important component of the power battery, the battery cover plate has a variety of excellent performance characteristics. The power battery, as the "heart" of a new energy vehicle, provides continuous power support for the vehicle.

[0003] One existing power battery cover can be found in Chinese utility model patent CN207489931U, which discloses a power battery cover and its power battery, "including a cover plate, a first terminal post and a second terminal post disposed on the cover plate; the cover plate is provided with an upward first protrusion, and the first protrusion is provided with a liquid injection hole penetrating the cover plate."

[0004] In use, the existing device utilizes a liquid injection through-hole on the first and / or second electrode units, which penetrates the cover plate body. This through-hole is fitted with a sealing element to seal it, raising the height distance between the through-hole and the inside of the power battery. This effectively improves the utilization rate of the internal space, increases the efficiency of liquid injection and vacuuming, and allows for a more efficient liquid injection method. It also prevents the injected electrolyte from flowing back out of the device, avoiding electrolyte leakage and cleaning issues. Furthermore, it allows for the expulsion of air from the device while injecting electrolyte, and the status of the valve orifice can be observed to understand the electrolyte injection status, preventing excessive injection and waste. Therefore, a power battery cover plate and its power battery that solve the above problems are needed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a power battery cover plate that has the advantages of unidirectional input, venting and liquid delivery, and observation of input volume, thus solving the problems mentioned in the background art.

[0006] This utility model provides the following technical solution: a power battery cover plate, including a cover plate body, an insulating plate at the bottom of the cover plate body, an inner groove on the inner wall of the insulating plate, an explosion-proof valve connected to the inner wall of the cover plate body, a valve hole on the inner wall of the explosion-proof valve, an mounting block on the outer wall of the insulating plate, a docking post connected to the outer wall of the cover plate body, an upper insulating component at the top of the cover plate body, an electrode post unit sleeved on the inner wall of the upper insulating component, a conductive base block at the bottom of the insulating plate, a conductive post installed on the top of the conductive base block, an infusion groove in the inner cavity of the cover plate body, a fixing seat sleeved on the inner wall of the infusion groove, an input groove in the inner cavity of the fixing seat, a compression spring connected to the top of the fixing seat, a valve core connected to the top of the compression spring, a plug head threadedly connected to the inner wall of the electrode post unit, and an installation screw hole on the inner wall of the plug head.

[0007] As a preferred embodiment of this utility model, the inner groove penetrates the inner wall of the insulating plate and the cover plate body, and the outer wall of the explosion-proof valve is adapted to the size of the inner wall of the inner groove.

[0008] In a preferred embodiment of this invention, the conductive post is positioned directly above the conductive base block, and the conductive post passes through the inner cavity of the insulating plate and the cover plate body to contact the pole unit.

[0009] In a preferred embodiment of this invention, the fixing base is installed in the inner cavity of the insulating plate, and the input groove is connected to the inner cavity of the infusion groove.

[0010] As a preferred embodiment of this utility model, the inner wall of the pole unit is provided with internal teeth, and the pole unit is threadedly connected to the plug head through the internal teeth.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The power battery cover plate, through the coordinated use of the plug head, the infusion tank, the valve core, and the compression spring, allows the plug head to be spirally ejected from the inner cavity of the terminal unit when electrolyte needs to be input into the device. The pressure of the electrolyte being output downwards is applied to the surface of the valve core, and the compression spring is compressed downwards. This prevents the valve core from blocking the inner cavity of the infusion tank in one direction, thus allowing the electrolyte to enter the device through the inner cavities of the infusion tank and the input tank.

[0013] 2. The power battery cover, through the coordinated use of the liquid infusion tank, valve core, explosion-proof valve, and valve hole on the device, allows the electrolyte to be input into the device when the valve core is pushed down, using the input tank in conjunction with the liquid infusion tank. At the same time, the air is vented outward through the valve hole at the explosion-proof valve in the middle of the device, thereby replacing the air in the device cavity with electrolyte. By observing whether electrolyte overflows at the valve hole, it can be determined whether the amount of electrolyte input is sufficient. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the insulating board of this utility model;

[0017] Figure 4 This is a schematic diagram of the valve hole structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the valve core structure of this utility model.

[0019] In the diagram: 1. Cover plate body; 2. Insulating plate; 3. Inner groove; 4. Explosion-proof valve; 5. Valve hole; 6. Mounting block; 7. Connecting post; 8. Upper insulating component; 9. Terminal post unit; 10. Conductive base block; 11. Conductive post; 12. Infusion tank; 13. Fixing base; 14. Input groove; 15. Compression spring; 16. Valve core; 17. Plug head; 18. Mounting screw hole; 19. Battery body; 20. Battery pack. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-5A power battery cover includes a cover body 1, an insulating plate 2 at the bottom of the cover body 1, an inner groove 3 on the inner wall of the insulating plate 2, an explosion-proof valve 4 connected to the inner wall of the cover body 1, a valve hole 5 on the inner wall of the explosion-proof valve 4, an mounting block 6 on the outer wall of the insulating plate 2, a docking post 7 connected to the outer wall of the cover body 1, an upper insulating component 8 at the top of the cover body 1, an electrode post unit 9 sleeved on the inner wall of the upper insulating component 8, a conductive base block 10 at the bottom of the insulating plate 2, a conductive post 11 mounted on the top of the conductive base block 10, an infusion groove 12 in the inner cavity of the cover body 1, a fixing seat 13 sleeved on the inner wall of the infusion groove 12, an input groove 14 in the inner cavity of the fixing seat 13, and the fixing seat 13... A compression spring 15 is connected to the top of the device, and a valve core 16 is connected to the top of the compression spring 15. A plug head 17 is threadedly connected to the inner wall of the electrode unit 9. The inner wall of the plug head 17 has a mounting screw hole 18. Through the cooperation of the plug head 17, the infusion tank 12, the valve core 16, and the compression spring 15, when electrolyte needs to be input into the device, the plug head 17 is spirally pulled out of the inner cavity of the electrode unit 9. The pressure of the electrolyte output downward is applied to the surface of the valve core 16, and the compression spring 15 is compressed downward. This prevents the valve core 16 from blocking the inner cavity of the infusion tank 12 in one direction, and allows the electrolyte to enter the device through the inner cavities of the infusion tank 12 and the input tank 14.

[0022] In a preferred embodiment, the inner groove 3 penetrates the inner walls of the insulating plate 2 and the cover plate body 1, and the outer wall of the explosion-proof valve 4 is adapted to the size of the inner wall of the inner groove 3. By having the inner groove 3 penetrate the inner walls of the insulating plate 2 and the cover plate body 1, the inner cavities of the cover plate body 1 and the insulating plate 2 are connected by the inner groove 3. The explosion-proof valve 4 is located in the inner wall of the cover plate body 1, isolating the upper and lower sides of the cover plate body 1. This allows the explosion pressure threshold of the cover plate body 1 to be determined by the explosion-proof valve 4 when the pressure of the bottom of the cover plate body 1 bursts upwards.

[0023] In a preferred embodiment, the conductive post 11 is disposed directly above the conductive base block 10, and the conductive post 11 passes through the inner cavity of the insulating plate 2 and the cover plate body 1 to contact the pole unit 9. By disposing the conductive post 11 directly above the conductive base block 10, when the conductive post 11 is installed on the top of the conductive base block 10, the current flowing at the conductive base block 10 is transmitted upward by the conductive post 11, thereby allowing the conductive post 11 to pass through the cover plate body 1 and the insulating plate 2 and contact the pole unit 9, thus achieving the effect of transmission.

[0024] In a preferred embodiment, the fixing seat 13 is installed in the inner cavity of the insulating plate 2, and the input groove 14 is connected to the inner cavity of the infusion tank 12. By installing the fixing seat 13 in the inner cavity of the insulating plate 2, the fixing seat 13 is installed from the bottom of the insulating plate 2 upwards, and the input groove 14 opened in the inner cavity of the fixing seat 13 is connected to the inner cavity of the infusion tank 12. Thus, when the valve core 16 of the device is driven downwards, the electrolyte is input by utilizing the connection between the input groove 14 and the infusion tank 12.

[0025] In a preferred embodiment, the inner wall of the pole unit 9 is provided with internal teeth, and the pole unit 9 is threadedly connected to the plug head 17 through the internal teeth. By providing internal teeth on the inner wall of the pole unit 9, after the opening of the infusion tank 12, the pole unit 9 is provided with internal teeth on its inner wall, and the plug head 17 is threadedly connected to the pole unit 9, thereby blocking the opening of the pole unit 9 by the plug head 17.

[0026] An application of a power battery cover in a power battery includes a battery body 19, which is disposed at the bottom of a cover body 1. The inner cavity of the battery body 19 contains a battery pack 20. By placing the battery body 19 at the bottom of the cover body 1, the battery pack 20 is loaded in the inner cavity of the battery body 19. The battery body 19 is connected to the cover body 1, thereby protecting the battery pack 20.

[0027] The working principle is as follows: First, through the coordinated use of the plug head 17, the infusion tank 12, the valve core 16, and the compression spring 15, when electrolyte needs to be input into the device, the plug head 17 is spirally ejected from the inner cavity of the electrode unit 9. The pressure from the downward output of electrolyte is applied to the surface of the valve core 16, causing the compression spring 15 to compress downward. This prevents the valve core 16 from blocking the inner cavity of the infusion tank 12 in one direction, allowing the electrolyte to enter the device through the inner cavities of the infusion tank 12 and the input tank 14. Then, through the coordinated use of the infusion tank 12, the valve core 16, the explosion-proof valve 4, and the valve hole 5, when the valve core 16 is pushed downward, the input tank 14, in conjunction with the infusion tank 12, inputs electrolyte into the device. At the same time, the valve hole 5 at the explosion-proof valve 4 in the middle of the device vents air outward, replacing the air in the inner cavity of the device with electrolyte. By observing whether electrolyte overflows from the valve hole 5, it can be determined whether the input amount of electrolyte is sufficient.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A power cell cover plate comprising a cover plate body (1), characterized in that: The bottom of the cover plate body (1) is provided with an insulating plate (2), the inner wall of the insulating plate (2) is provided with an inner groove (3), the inner wall of the cover plate body (1) is connected with an explosion-proof valve (4), the inner wall of the explosion-proof valve (4) is provided with a valve hole (5), the outer wall of the insulating plate (2) is provided with a mounting block (6), the outer wall of the cover plate body (1) is connected with a butt joint column (7), the top of the cover plate body (1) is provided with an upper insulating part (8), the inner wall of the upper insulating part (8) is sleeved with a pole column unit (9), the bottom of the insulating plate (2) is provided with a conductive base block (10), the top of the conductive base block (10) is provided with a conductive column (11), the inner cavity of the cover plate body (1) is provided with a transfusion groove (12), the inner wall of the transfusion groove (12) is sleeved with a fixing seat (13), the inner cavity of the fixing seat (13) is provided with an input slot (14), the top of the fixing seat (13) is connected with a compression spring (15), the top of the compression spring (15) is connected with a valve core (16), the inner wall of the pole column unit (9) is threadedly connected with a plug head (17), the inner wall of the plug head (17) is provided with a mounting screw hole (18).

2. The power battery cover plate according to claim 1, characterized in that: The inner groove (3) penetrates the inner walls of the insulating plate (2) and the cover plate body (1), and the outer wall of the explosion-proof valve (4) is matched with the inner wall of the inner groove (3).

3. The power cell cover plate of claim 2, wherein: The conductive column (11) is arranged above the conductive base block (10), and the conductive column (11) penetrates the inner cavities of the insulating plate (2) and the cover plate body (1) and is in contact with the pole column unit (9).

4. The power cell cover plate of claim 3, wherein: The fixing seat (13) is arranged in the inner cavity of the insulating plate (2), and the input slot (14) is communicated with the inner cavities of the transfusion groove (12).

5. The power cell cover plate of claim 4, wherein: The inner wall of the pole column unit (9) is provided with inner teeth, and the pole column unit (9) is threadedly connected with the plug head (17) through the inner teeth.

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