CN220341348U - Ultra-thin explosion-proof combined cap - Google Patents

Abstract

The utility model discloses an ultra-thin explosion-proof combined cap, which comprises a sealing ring; the lower end of the sealing ring is internally provided with a boss; the explosion-proof piece is arranged on a boss at the lower end of the sealing ring; the isolating ring is arranged on the periphery of the bottom of the explosion-proof piece; the connecting aluminum sheet is arranged at the bottom of the isolation ring; the steel cap is arranged at the top of the explosion-proof piece and is fixed with the periphery of the explosion-proof piece through wire welding. According to the ultra-thin explosion-proof combined cap, the steel cap and the explosion-proof piece are directly connected in a wire welding mode, so that a traditional riveting process is omitted, the design height of a sealing ring can be greatly reduced, the integral height of the cap is greatly reduced, and the battery capacity is improved.

Description

Ultra-thin explosion-proof combined cap

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to an ultrathin explosion-proof combined cap.

Background

A battery refers to a device that converts chemical energy into electrical energy in a cup, tank, or other container or portion of a composite container that contains an electrolyte solution and metal electrodes to generate an electrical current. Has a positive electrode and a negative electrode. With the advancement of technology, batteries are widely referred to as small devices capable of generating electrical energy. The performance parameters of the battery are mainly electromotive force, capacity, specific energy and resistance. The battery is used as an energy source, the current which has stable voltage, stable current, long-time stable power supply and little influence from the outside can be obtained, the battery has simple structure, convenient carrying, simple and easy charging and discharging operation, is not influenced by the outside climate and temperature, has stable and reliable performance, and plays a great role in various aspects in the life of the modern society.

Because the lithium battery is usually used in a multi-serial and parallel combination way, the total energy of the battery is larger, the hidden danger of overcharging a single battery or overcharging the whole battery pack exists in the charging process, and when the lithium battery is overcharged, the battery voltage rapidly rises along with the increase of polarization, the irreversible change of a positive electrode active material structure and the decomposition of electrolyte can be caused, a large amount of gas is generated, a large amount of heat is released, the temperature and the internal pressure of the battery are rapidly increased, and hidden troubles such as explosion, combustion and the like exist. Then the explosion-proof cap is arranged for protection in the prior art.

The explosion-proof cap in the prior art generally comprises a steel cap, a sealing ring, a spacer, a connecting aluminum sheet, an explosion-proof sheet and the like, wherein the thickness of the explosion-proof sheet is generally 0.4mm, and the thickness of the steel cap is generally 0.8mm, so that the sealing ring needs to be designed to be higher in height, the explosion-proof sheet and the steel cap are riveted firstly and then are connected through arc welding, the process is complex, the cost is high, and the heat dissipation effect is poor.

Therefore, it is necessary to provide an ultra-thin explosion-proof combined cap to solve the above problems.

Disclosure of Invention

The utility model mainly aims to provide an ultrathin explosion-proof combined cap which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

an ultra-thin explosion-proof combined cap comprises a sealing ring;

the lower end of the sealing ring is internally provided with a boss;

the explosion-proof piece is arranged on a boss at the lower end of the sealing ring;

the isolating ring is arranged on the periphery of the bottom of the explosion-proof piece;

the connecting aluminum sheet is arranged at the bottom of the isolation ring;

the steel cap is arranged at the top of the explosion-proof piece and is fixed with the periphery of the explosion-proof piece through wire welding.

Preferably, the edge thickness of the explosion-proof sheet is 0.3mm, and the edge thickness of the steel cap is 0.5mm.

Preferably, the middle part of the explosion-proof sheet is concave downwards, the edge is provided with an explosion-proof sheet folding edge which is vertically upwards, and the height of the explosion-proof sheet folding edge is the same as the thickness of the edge of the steel cap.

Preferably, an annular groove is formed in the periphery of the top of the steel cap, and wire welding areas are uniformly formed in the annular groove.

Preferably, the number of wire bonding areas is three, and the wire bonding areas are used for wire bonding connection between the steel cap and the explosion-proof sheet.

Preferably, the bottom of the explosion-proof sheet is tightly attached to the middle part of the top of the connecting aluminum sheet, a gap is formed between the inner periphery of the bottom of the explosion-proof sheet and the top of the periphery of the connecting aluminum sheet, a waterproof breathable film is arranged in the gap, and heat dissipation holes corresponding to the waterproof breathable film are uniformly formed in the inner periphery of the explosion-proof sheet.

Preferably, the upper side and the lower side of the waterproof breathable film are tightly attached to the bottom of the explosion-proof piece and the top of the connecting aluminum sheet.

Advantageous effects

Compared with the prior art, the utility model provides an ultrathin explosion-proof combined cap, which has the following beneficial effects:

1. this ultra-thin explosion-proof combination block through the steel cap that sets up and explosion-proof piece through the mode lug connection of wire bonding, has cancelled traditional riveting technology, and sealing washer design height can reduce by a wide margin, greatly reduced the block overall height, makes battery capacity obtain promoting, and the setting of ring channel and wire bonding district is convenient for go on of wire bonding.

2. This ultra-thin explosion-proof combination block, waterproof ventilated membrane and the louvre through setting up are convenient for improve the heat dispersion of this block, and when inside heat transfer was given and is connected the aluminum sheet, connect the aluminum sheet and can pass through waterproof ventilated membrane and transfer away from the louvre with heat to waterproof ventilated membrane can avoid outside water to get into, does not influence inside thermal discharge again simultaneously.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the present utility model in section taken along the A-A direction in FIG. 1;

fig. 3 is an enlarged view of fig. 2 at a in accordance with the present utility model.

In the figure: 1. a steel cap; 2. an annular groove; 3. folding the explosion-proof sheet; 4. a seal ring; 5. a wire bonding region; 6. a boss; 7. a spacer ring; 8. connecting an aluminum sheet; 9. explosion-proof sheet; 10. a waterproof breathable film; 11. and the heat dissipation holes.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

As shown in fig. 1-3, an ultra-thin explosion-proof combined cap comprises a sealing ring 4; a boss 6 is inwards arranged at the lower end of the sealing ring 4;

further, the anti-explosion device also comprises an anti-explosion piece 9, wherein the anti-explosion piece 9 is arranged on the boss 6 at the lower end of the sealing ring 4, the edge thickness of the anti-explosion piece 9 is 0.3mm, the middle part of the anti-explosion piece 9 is concave downwards, the edge is provided with an anti-explosion piece folded edge 3 which is vertically upwards, and the height of the anti-explosion piece folded edge 3 is the same as the edge thickness of the steel cap 1;

further, the explosion-proof device further comprises a steel cap 1, wherein the steel cap 1 is arranged on the top of the explosion-proof piece 9, the steel cap 1 is fixed with the periphery of the explosion-proof piece 9 through wire welding, and the edge thickness of the steel cap 1 is 0.5mm.

Further, the top periphery of the steel cap 1 is provided with the annular groove 2, wire welding areas 5 are uniformly arranged in the annular groove 2, the number of the wire welding areas 5 is three, the wire welding areas 5 are used for wire welding connection between the steel cap 1 and the explosion-proof piece 9, the traditional riveting process is cancelled through the direct connection of the arranged steel cap 1 and the explosion-proof piece 9 in a wire welding mode, the design height of the sealing ring 4 can be greatly reduced, the overall height of the cap is greatly reduced, and the battery capacity is improved.

Further, a spacer 7 is also arranged, and the spacer 7 is arranged at the periphery of the bottom of the explosion-proof sheet 9;

further, a connecting aluminum sheet 8 is also arranged, and the connecting aluminum sheet 8 is arranged at the bottom of the isolation ring 7;

further, the bottom of explosion-proof piece 9 closely laminates with the top middle part of connecting aluminum sheet 8, form the clearance between the bottom inner periphery of explosion-proof piece 9 and the peripheral top of connecting aluminum sheet 8, be provided with waterproof ventilated membrane 10 in this clearance, the upper and lower both sides of waterproof ventilated membrane 10 closely laminate with the bottom of explosion-proof piece 9 and the top of connecting aluminum sheet 8, the louvre 11 that corresponds with waterproof ventilated membrane 10 has evenly been seted up to the inner periphery of explosion-proof piece 9, be convenient for improve the heat dispersion of this block through waterproof ventilated membrane 10 and louvre 11 that set up, when inside heat transfer was given and is connected aluminum sheet 8, connect aluminum sheet 8 can pass through waterproof ventilated membrane 10 and follow louvre 11 with heat transfer, and waterproof ventilated membrane 10 can avoid outside water to get into, simultaneously do not influence inside heat's discharge.

It should be noted that, the utility model is an ultra-thin explosion-proof combined cap, the explosion-proof sheet 9 is fixed on the boss 6 of the lower end of the seal ring 4 when in use, the steel cap 1 is arranged at the upper end of the explosion-proof sheet 9, three wire welding areas 5 in the annular groove 2 are fixed by wire welding, the steel cap 1 and the explosion-proof sheet 9 are directly connected by wire welding, the traditional riveting process is cancelled, the design height of the seal ring 4 can be greatly reduced, the overall height of the cap is greatly reduced, the battery capacity is improved, in addition, the waterproof breathable film 10 and the radiating hole 11 are convenient for improving the radiating performance of the cap, when internal heat is transferred to the connecting aluminum sheet 8, the connecting aluminum sheet 8 can transfer heat from the radiating hole 11 through the waterproof breathable film 10, compared with the method of directly transferring heat through the explosion-proof sheet 9, the waterproof breathable film 10 can avoid external water from entering, meanwhile, the device has a simple and compact structure and low cost, and is suitable for wide popularization.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (7)

1. An ultra-thin explosion-proof combined cap is characterized by comprising a sealing ring (4);

the lower end of the sealing ring (4) is internally provided with a boss (6);

the explosion-proof piece (9) is arranged on the boss (6) at the lower end of the sealing ring (4);

the isolating ring (7) is arranged on the periphery of the bottom of the explosion-proof piece (9);

the aluminum connecting piece (8) is arranged at the bottom of the isolation ring (7);

the steel cap (1), steel cap (1) sets up in the top of explosion-proof piece (9) to steel cap (1) is fixed with the peripheral wire bonding of explosion-proof piece (9).

2. The ultra-thin explosion-proof composite cap according to claim 1, wherein: the edge thickness of the explosion-proof sheet (9) is 0.3mm, and the edge thickness of the steel cap (1) is 0.5mm.

3. The ultra-thin explosion-proof composite cap according to claim 2, wherein: the middle part of the explosion-proof sheet (9) is concave downwards, the edge is provided with an explosion-proof sheet folding edge (3) which is vertically upwards, and the height of the explosion-proof sheet folding edge (3) is the same as the thickness of the edge of the steel cap (1).

4. An ultra-thin explosion-proof composite cap according to claim 3, wherein: an annular groove (2) is formed in the periphery of the top of the steel cap (1), and wire welding areas (5) are uniformly formed in the annular groove (2).

5. The ultra-thin explosion-proof composite cap according to claim 4, wherein: the number of the wire bonding areas (5) is three, and the wire bonding areas (5) are used for wire bonding connection between the steel cap (1) and the explosion-proof piece (9).

6. The ultra-thin explosion-proof composite cap according to claim 1, wherein: the bottom of explosion-proof piece (9) closely laminates with the top middle part of connecting aluminum sheet (8), forms the clearance between the bottom inner periphery of explosion-proof piece (9) and the peripheral top of connecting aluminum sheet (8), is provided with waterproof ventilated membrane (10) in this clearance, the radiating hole (11) that correspond with waterproof ventilated membrane (10) have evenly been seted up to the inner periphery of explosion-proof piece (9).

7. The ultra-thin explosion-proof composite cap according to claim 6, wherein: the upper side and the lower side of the waterproof breathable film (10) are tightly attached to the bottom of the explosion-proof piece (9) and the top of the connecting aluminum sheet (8).