Anti-cracking lithium battery safety cap

Abstract

The utility model discloses an anti-cracking lithium battery safety cap, which comprises a battery body, a cap is fixedly arranged at one end of the battery body, the cap is arranged at the positive electrode end of the battery body, an anti-cracking component is arranged on the inner wall of the cap, the positive electrode of the battery body is electrically connected with the anti-cracking component in the cap through a lead, and the negative electrode of the battery body is electrically connected with the anti-cracking component through the lead. The utility model relates to the field of battery cover caps, and aims to solve the problem that the use cost of a battery is increased due to the fact that the battery cover cap needs to be returned to a factory for maintenance after being damaged. The device has the technical effects that the third circular plate is rotationally detached through the anti-cracking assembly, internal damaged parts are detached and replaced, and the cap can be conveniently used for the second time.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery equipment, in particular to a rupture-proof lithium battery safety cap. Background Art

[0002] A lithium battery is a battery with lithium metal or lithium compounds as the negative electrode material. It is a rechargeable battery that can convert chemical energy into electrical energy by inputting current into the battery, or store chemical energy by generating current in the battery. Lithium batteries are widely used in mobile devices, electric vehicles, and energy storage systems due to their high energy density, long cycle life, and low self-discharge rate. The anti-rupture safety cap of a lithium battery is a device used to improve the safety performance of a lithium battery, designed to prevent the lithium battery from exploding or rupturing under abnormal conditions (such as overcharging, over-discharging, external damage, etc.).

[0003] Most of the existing lithium battery anti-rupture caps push up the diaphragm inside the cap when the battery is overcharged and generates expansion pressure, thereby opening the circuit of the battery's positive electrode. However, this structure requires the battery to be replaced every time a failure occurs. Once the battery cap is damaged, the cap usually cannot be used again and needs to be returned to the factory for maintenance, which increases the cost of using the battery.

[0004] In view of this, we propose an anti-rupture lithium battery safety cap. Utility Model Content

[0005] Therefore, the purpose of the utility model is to provide a rupture-proof lithium battery safety cap to solve the above-mentioned problems in the prior art.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] According to the first aspect of the utility model, it includes a battery body, one end of which is fixedly mounted with a cap, the cap is arranged at the positive end of the battery body, the inner wall of the cap is provided with an anti-rupture component, the positive electrode of the battery body is electrically connected to the anti-rupture component in the cap through a wire, and the anti-rupture component can protect the use of the battery body.

[0008] Furthermore, the anti-rupture component includes a circular plate 1, the surface of which is evenly provided with openings, the circular plate 1 is arranged on the inner wall of the cap, the bottom of the inner wall of the cap is provided with a protrusion, and the protrusion is a circular ring structure.

[0009] Furthermore, the bottom surface of the circular plate 1 contacts the protrusion of the inner wall of the cap, and the surface of the circular plate 1 is covered with a resistance layer. The resistance layer on the surface of the circular plate 1 uses a PTC thermistor material, and the resistance layer on the surface of the circular plate 1 is consistent with the structural shape of the circular plate 1.

[0010] Furthermore, a circular plate 2 is provided on the top of the circular plate 1, a circular opening is provided at the center of the surface of the circular plate 2, a filter membrane is fixedly installed on the inner wall of the circular opening of the circular plate 2, and the filter membrane is made of EPTFE membrane material.

[0011] Furthermore, threads are evenly arranged on the top of the inner wall of the cap, a circular plate three is arranged on the top of the cap, holes are evenly opened on the surface of the circular plate three, and a threaded opening is arranged on the bottom of the circular plate three.

[0012] Furthermore, the circular plate three is threadedly connected to the cap, and a spring is provided on the top surface of the circular plate two, one end of the spring contacts the bottom surface of the circular plate three, and the other end of the spring contacts the top surface of the circular plate two.

[0013] Furthermore, the circular plate 1, the circular plate 2 and the circular plate 3 are all made of metal, and the circular plate 3 can be electrically connected to the positive electrode of the battery body through the circular plate 1.

[0014] Furthermore, one end of the wire is welded to the circular plate, and the other end of the wire is electrically connected to the battery body.

[0015] The utility model has the following advantages: the utility model can protect the battery body when the battery body is in use through the anti-rupture component; when the battery is overcharged, the expansion pressure generated inside the battery can lift up the circular plate two, thereby disconnecting the contact with the circular plate one, causing the battery to short-circuit; and because the temperature inside the battery is high, the resistance of the resistance layer on the surface of the circular plate one can increase, further causing the battery to short-circuit; and the anti-rupture component can disassemble and replace the damaged internal parts by rotating and disassembling the circular plate three, so that the cap can be easily reused, effectively reducing the use cost of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of an anti-rupture lithium battery safety cap of the utility model;

[0017] Figure 2 This is a schematic diagram of disassembling a cap of an anti-rupture lithium battery safety cap according to the utility model;

[0018] Figure 3 This is a schematic diagram of disassembling an anti-rupture component of an anti-rupture lithium battery safety cap of the utility model;

[0019] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of an anti-rupture component of an anti-rupture lithium battery safety cap.

[0020] In the figure: 11, battery body, 12, wire, 21, cap, 211, protrusion, 212, thread, 22, round plate one, 23, round plate two, 231, filter membrane, 24, spring, 25, round plate three, 251, threaded mouth. DETAILED DESCRIPTION

[0021] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1

[0023] like Figure 1-Figure 2 As shown, an anti-rupture lithium battery safety cap in the embodiment of the first aspect of the utility model comprises a battery body 11, a cap 21 is fixedly mounted on one end of the battery body 11, the cap 21 is arranged at the positive end of the battery body 11, an anti-rupture component is arranged on the inner wall of the cap 21, the positive electrode of the battery body 11 is electrically connected to the anti-rupture component in the cap 21 through a wire 12, and the anti-rupture component can protect the use of the battery body 11;

[0024] In the above embodiment, it should be noted that the cap 21 is the positive electrode of the battery body 11. When in use, one end of the cap 21 is installed at the positive electrode position. When the battery body 11 is overcharged, the expansion pressure generated can disconnect the anti-rupture component, making the positive electrode of the battery body 11 open.

[0025] Example 2

[0026] like Figure 2-Figure 4 As shown, an anti-rupture lithium battery safety cap in the embodiment of the first aspect of the utility model includes all the contents of embodiment 1, and in addition, the anti-rupture component includes a circular plate 22, the surface of the circular plate 22 is evenly provided with openings, the circular plate 22 is arranged on the inner wall of the cap 21, the bottom of the inner wall of the cap 21 is provided with a protrusion 211, the protrusion 211 is a circular ring structure, the bottom surface of the circular plate 22 is in contact with the protrusion 211 on the inner wall of the cap 21, the surface of the circular plate 22 is covered with a resistance layer, the resistance layer on the surface of the circular plate 22 uses a PTC thermistor material, the resistance layer on the surface of the circular plate 22 is consistent with the structural shape of the circular plate 22, and the top of the circular plate 22 is provided with a circular plate 23;

[0027] In the above embodiment, it should be noted that when the battery body 11 is overcharged, the high temperature generated can cause the resistance layer on the surface of the circular plate 22 to heat up. When the PTC thermistor material is at a high temperature, the resistance of the resistance layer can be increased, so that the resistance value between the circular plate 1 22 and the circular plate 2 23 becomes higher, thereby protecting the positive electrode of the battery body 11.

[0028] Example 3

[0029] like Figure 2-Figure 4 As shown, a rupture-proof lithium battery safety cap in the embodiment of the first aspect of the utility model includes all the contents of embodiment 2, in addition, a circular opening is provided at the center of the surface of the circular plate 23, a filter membrane 231 is fixedly installed on the inner wall of the circular opening of the circular plate 23, and the filter membrane 231 is made of EPTFE membrane material, threads 212 are evenly provided on the top of the inner wall of the cap 21, a circular plate 3 25 is provided on the top of the cap 21, openings are evenly provided on the surface of the circular plate 3 25, a threaded opening 251 is provided on the bottom of the circular plate 3 25, the circular plate 3 25 is threadedly connected to the cap 21, a spring 24 is provided on the top surface of the circular plate 23, one end of the spring 24 is in contact with the bottom surface of the circular plate 3 25, and the other end of the spring 24 is in contact with the top surface of the circular plate 23;

[0030] In the above embodiment, it should be noted that when the battery body 11 is overcharged, the expansion pressure generated can squeeze the filter membrane 231, so that the filter membrane 231 drives the circular plate 23 to lift up and away from the circular plate 1 22, thereby further opening the positive electrode of the battery body. When the pressure inside the battery body 11 becomes smaller, the circular plate 23 can be reset by the spring 24. When the battery body 11 is damaged due to overcharging, the circular plate 3 25 can be disassembled by rotating the circular plate 3 25, so that the internal parts can be replaced, which is convenient for the secondary use of the cap 21.

[0031] Example 4

[0032] like Figure 2-Figure 4 As shown, a rupture-proof lithium battery safety cap in the embodiment of the first aspect of the utility model includes all the contents of embodiment 3. In addition, the circular plate 1 22, the circular plate 23 and the circular plate 3 25 are all made of metal, and the circular plate 3 25 can be electrically connected to the positive electrode of the battery body 11 through the circular plate 1 22. One end of the wire 12 is welded to the circular plate 1 22, and the other end of the wire 12 is electrically connected to the battery body 11.

[0033] In the above embodiment, it should be noted that the circular plate 1 22 , the circular plate 23 and the circular plate 3 25 can be electrically conductive with each other, so that the circular plate 3 25 can be electrically connected to the positive electrode of the battery body 11 .

[0034] The use process of the utility model is as follows. Those skilled in the art will understand that when the battery body 11 is overcharged, the expansion pressure generated can disconnect the anti-rupture component, so that the positive electrode of the battery body 11 is open-circuited, and the expansion pressure generated can squeeze the filter membrane 231, so that the filter membrane 231 drives the circular plate 23 to lift up and away from the circular plate 1 22, thereby further opening the positive electrode of the battery body. When the internal pressure of the battery body 11 becomes smaller, the circular plate 23 can be reset by the spring 24. When the battery body 11 is damaged due to overcharging, the circular plate 3 25 can be disassembled by rotating the circular plate 3 25, so that the internal parts can be replaced, which is convenient for the secondary use of the cap 21.

[0035] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A rupture-proof lithium battery safety cap, comprising a battery body (11), one end of the battery body (11) being fixedly mounted with a cap (21), the cap (21) being arranged at the positive end of the battery body (11), characterized in that: The inner wall of the cap (21) is provided with an anti-rupture component, the positive electrode of the battery body (11) is electrically connected to the anti-rupture component in the cap (21) via a wire (12), and the anti-rupture component can protect the battery body (11) during use.

2. The anti-rupture lithium battery safety cap according to claim 1, characterized in that: The anti-rupture component comprises a circular plate (22), the surface of which is evenly provided with openings, the circular plate (22) is arranged on the inner wall of the cover cap (21), the bottom of the inner wall of the cover cap (21) is provided with a protrusion (211), and the protrusion (211) is a circular ring structure.

3. The anti-rupture lithium battery safety cap according to claim 2, characterized in that: The bottom surface of the circular plate 1 (22) contacts the protrusion (211) on the inner wall of the cap (21), and the surface of the circular plate 1 (22) is covered with a resistance layer. The resistance layer on the surface of the circular plate 1 (22) uses a PTC thermistor material, and the resistance layer on the surface of the circular plate 1 (22) is consistent with the structural shape of the circular plate 1 (22).

4. The anti-rupture lithium battery safety cap according to claim 3, characterized in that: A second circular plate (23) is provided on the top of the first circular plate (22), a circular opening is provided at the center of the surface of the second circular plate (23), a filter membrane (231) is fixedly installed on the inner wall of the circular opening of the second circular plate (23), and the filter membrane (231) is made of EPTFE membrane material.

5. The anti-rupture lithium battery safety cap according to claim 4, characterized in that: The top of the inner wall of the cap (21) is evenly provided with threads (212), the top of the cap (21) is provided with a circular plate three (25), the surface of the circular plate three (25) is evenly provided with openings, and the bottom of the circular plate three (25) is provided with a threaded opening (251).

6. The anti-rupture lithium battery safety cap according to claim 5, characterized in that: The circular plate three (25) is threadedly connected to the cover cap (21), and a spring (24) is provided on the top surface of the circular plate two (23), one end of the spring (24) contacts the bottom surface of the circular plate three (25), and the other end of the spring (24) contacts the top surface of the circular plate two (23).

7. The anti-rupture lithium battery safety cap according to claim 6, characterized in that: The circular plate one (22), circular plate two (23) and circular plate three (25) are all made of metal, and circular plate three (25) can be electrically connected to the positive pole of the battery body (11) through circular plate one (22).

8. The anti-rupture lithium battery safety cap according to claim 7, characterized in that: One end of the wire (12) is welded to the circular plate (22), and the other end of the wire (12) is electrically connected to the battery body (11).

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