Detachable battery cover plate liquid injection hole structure

Abstract

The utility model discloses a detachable battery cover plate liquid injection hole structure which is applied to a cover plate and comprises a rotation stopping screw and a sealing ring, the cover plate is provided with a positive pole hole, a negative pole hole, an explosion-proof membrane exhaust hole and a liquid injection hole, the cover plate where the liquid injection hole is located is designed to be thickened, and the sealing ring is arranged on the sealing ring. The liquid injection hole comprises a threaded mounting hole and a feeding hole, the hole diameter of the threaded mounting hole decreases gradually from top to bottom, a rotation stopping screw is mounted at the threaded mounting hole in a threaded mode, a sealing ring is mounted below the rotation stopping screw, one end of the sealing ring abuts against the end face of the rotation stopping screw, and the other end of the sealing ring abuts against the bottom end face of the rotation stopping screw. A sealing line is arranged on the end face of the bottom of the rotation stopping screw in an upward protruding mode. According to the mode, the secondary electrolyte injection device is simple in structure, ingenious in design, capable of being detachably installed, good in sealing performance and capable of injecting electrolyte for the second time, and the recovery cost of the battery is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a detachable battery cover liquid injection hole structure. Background Art

[0002] After the battery is assembled, electrolyte needs to be injected into the battery cell through the injection hole on the cover, and finally the injection hole is sealed. At present, the injection holes of most batteries are sealed with steel balls and welds, and the injection holes are permanently sealed and cannot be removed. On the one hand, when the battery cell is bloated, the battery cell can only be opened through the explosion-proof membrane to release the internal pressure of the battery cell. After the explosion-proof membrane is opened, the entire battery cell fails and cannot be used anymore. On the other hand, as the battery cell is used, the amount of electrolyte decreases and the capacity decreases. The above-mentioned sealing structure cannot be repeatedly disassembled for refilling.

[0003] Based on the above defects and shortcomings, it is necessary to improve the existing technology and design a detachable battery cover injection hole structure. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a detachable battery cover injection hole structure, which has a simple structure, ingenious design, detachable installation, good sealing performance, and can be injected with electrolyte for a second time, thereby reducing the recycling cost of the battery.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a detachable battery cover injection hole structure, and the detachable battery cover injection hole structure is applied to the cover, and the cover is provided with positive and negative pole holes, explosion-proof membrane exhaust holes and injection holes, and also includes a stop screw and a sealing ring. The cover is thickened at the location of the injection hole, and the injection hole includes a threaded mounting hole with a decreasing aperture from top to bottom and a feed hole. A stop screw is threadedly installed at the threaded mounting hole, and a sealing ring is installed under the stop screw, one end of the sealing ring is abutted against the end face of the stop screw, and the other end of the sealing ring is abutted against the bottom end face of the stop screw, and the bottom end face of the stop screw is protruding upward and provided with a sealing line.

[0006] Preferably, the sealing line surrounds the bottom end surface of the stop screw.

[0007] Preferably, the cross section of the sealing line is semicircular or triangular.

[0008] Preferably, the stop screw is provided with an external thread matching with the threaded mounting hole, and the upper end surface of the stop screw is provided with a groove for facilitating installation and locking.

[0009] Preferably, an R angle for guiding is provided at the connection between the feed hole and the threaded mounting hole.

[0010] Preferably, the depth of the injection hole is not less than 1 mm.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The anti-rotation screw and the injection hole are installed by thread locking. The threaded connection has a large torque, which can be locked in the forward direction and removed in the reverse direction. It can be detachably installed and can be filled with electrolyte for the second time, reducing the recycling cost of the battery.

[0013] The sealing ring and sealing line are set to increase the sealing performance and the sealing resistance after the sealing ring is compressed to avoid leakage;

[0014] An R angle is arranged on the upper end of the through hole at the bottom of the injection hole to play a guiding role when injecting liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of a detachable battery cover liquid injection hole structure.

[0016] Figure 2 The figure is a schematic diagram of the unfolded structure of a detachable battery cover liquid injection hole structure.

[0017] Figure 3 The present invention is an assembly diagram of a liquid injection hole of a detachable battery cover liquid injection hole structure.

[0018] Figure 4 The figure is a schematic diagram of a liquid injection hole structure of a detachable battery cover.

[0019] Among them, 1. Cover plate, 10. Positive and negative pole holes, 11. Explosion-proof membrane exhaust hole, 12. Liquid injection hole, 121. Threaded mounting hole, 122. Feed hole, 13. Sealing line, 2. Stop screw, 3. Sealing ring, etc. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0021] See also Figures 1 to 4 , the utility model embodiment includes:

[0022] A detachable battery cover injection hole structure, the detachable battery cover injection hole structure is applied to the cover 1, including a stop screw 2 and a sealing ring 3, the cover 1 is provided with positive and negative pole holes 10, an explosion-proof membrane exhaust hole 11 and an injection hole 12, the cover 1 is thickened at the location of the injection hole 12, the depth of the injection hole 12 is not less than 1 mm, the injection hole 12 includes a threaded mounting hole 121 with a decreasing aperture from top to bottom and a feed hole 122, a stop screw 2 is threadedly mounted at the threaded mounting hole 121, a sealing ring 3 is installed below the stop screw 2, one end of the sealing ring 3 is abutted against the end face of the stop screw 2, and the other end of the sealing ring 3 is abutted against the bottom end face of the stop screw 2, the bottom end face of the stop screw 2 is protruded upward with a sealing line 13, which increases the sealing resistance after the sealing ring 3 is compressed, and the sealing line 13 surrounds the bottom end face of the stop screw 2; the cross-section of the sealing line 13 is semicircular, triangular or other protruding shapes.

[0023] The stop screw 2 is provided with an external thread that matches the threaded mounting hole 121, and the torque at the threaded connection is up to 8 N.m. The upper end surface of the stop screw 2 is provided with a groove that is convenient for installation and locking.

[0024] An R angle is provided at the connection between the feed hole 122 and the threaded mounting hole 121 to play a guiding role, so as to facilitate the flow of liquid into the feed hole 122 .

[0025] The positive and negative electrode post holes 10 are in a square, rectangular or elliptical shape, and the size and shape of the through holes can be changed according to product requirements.

[0026] The size, shape and position of the explosion-proof membrane exhaust hole 11 can be changed according to product requirements, and can be square, rectangular or elliptical, etc., limited to the shape shown in the figure but not limited to other shapes.

[0027] When the detachable battery cover liquid injection hole structure of the utility model is in operation, the cover plate 1 is installed on the battery. After the battery has been used for a period of time, the anti-rotation screw 2 is reversely unscrewed, the sealing ring 3 is taken out, and electrolyte is injected from the liquid injection hole 12 for a second time. Then the sealing ring 3 is replaced and the anti-rotation screw 2 is locked. The repair rate of waste batteries is greatly improved through the secondary liquid injection. In the battery manufacturing process, the anti-rotation screw replaces the existing welding process, which can effectively improve the product yield and reduce the production cost.

[0028] The utility model discloses a detachable battery cover liquid injection hole structure, which has the advantages of simple structure, ingenious design, detachable installation, good sealing performance, and the ability to inject electrolyte for a second time, thus reducing the recycling cost of the battery.

[0029] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A detachable battery cover injection hole structure, applied to the cover, the cover is provided with positive and negative pole holes, explosion-proof membrane exhaust holes and injection holes, characterized in that: It also includes a stop screw and a sealing ring. The cover plate at the location of the injection hole is thickened. The injection hole includes a threaded mounting hole with a decreasing aperture from top to bottom and a material inlet hole. A stop screw is threadedly installed at the threaded mounting hole. A sealing ring is installed under the stop screw. One end of the sealing ring is abutted against the end face of the stop screw, and the other end of the sealing ring is abutted against the bottom end face of the stop screw. The bottom end face of the stop screw is protruding upward and is provided with a sealing line.

2. The detachable battery cover liquid injection hole structure according to claim 1, characterized in that: The sealing line surrounds the bottom end surface of the stop screw.

3. The detachable battery cover liquid injection hole structure according to claim 1, characterized in that: The cross section of the sealing line is semicircular or triangular.

4. The detachable battery cover liquid injection hole structure according to claim 1, characterized in that: The anti-rotation screw is provided with an external thread that matches the threaded mounting hole, and the upper end surface of the anti-rotation screw is provided with a groove that is convenient for installation and locking.

5. The detachable battery cover liquid injection hole structure according to claim 1, characterized in that: The connection between the feeding hole and the threaded mounting hole is provided with an R angle which plays a guiding role.

6. The detachable battery cover liquid injection hole structure according to claim 1, characterized in that: The depth of the injection hole is not less than 1 mm.

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