CN219321503U

CN219321503U - Environment-friendly explosion-proof lithium ion battery

Info

Publication number: CN219321503U
Application number: CN202223302112.1U
Authority: CN
Inventors: 车小林
Original assignee: Qingdao Longxiang Precision Industry Co ltd
Current assignee: Qingdao Longxiang Precision Industry Co ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-07-07
Anticipated expiration: 2032-12-06

Abstract

The utility model discloses an environment-friendly explosion-proof lithium ion battery, and relates to the field of lithium batteries. Comprising the following steps: the anti-explosion shell is of two groups of shell structures which are symmetrically arranged, the two groups of anti-explosion shells are mutually buckled to form a box body, and a lithium ion battery cell body is arranged in the box body formed by the two groups of anti-explosion shells; an internal support structure disposed inside the explosion proof housing; an anti-gassing structure disposed on the internal support structure to prevent gassing of the lithium ion battery cell body; and the leakage observation mechanism is arranged on the explosion-proof shell so as to observe the leakage condition of the lithium ion battery cell body.

Description

Environment-friendly explosion-proof lithium ion battery

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to an environment-friendly explosion-proof lithium ion battery.

Background

Lithium batteries are a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a positive/negative electrode material. The chemical characteristics of lithium metal are very active, so that the processing, storage and use of lithium metal have very high requirements on environment. With the development of science and technology, lithium batteries have become mainstream, but the environmental protection and explosion protection properties of lithium batteries are still main research and development objects.

As in the prior art, application number: CN201821340353.6, patent title: the utility model discloses an environment-friendly explosion-proof lithium ion battery, which comprises a shell, wherein fireproof material bags are fixedly arranged on two sides of the inside of the shell, fireproof particles are filled in the fireproof material bags, a plurality of exhaust holes are formed in two ends of the shell, one end of each exhaust hole, which is close to the lithium ion battery, is connected with an air outlet end of a one-way valve, the one-way valve is embedded on the inner wall of the shell, and the lithium ion battery is arranged in the shell.

However, the safety of the lithium ion battery in the above patent is still insufficient, especially in the observation of the use state, for example, the observation of the leakage condition of the battery cannot be achieved, that is, the observation and the early warning of the leakage condition of the lithium ion battery cannot be achieved, in the above patent, only the leakage and fire prevention condition can be dealt with, and the manner that the puncture needle punctures the fire-proof material bag cannot accurately cope with the fire condition of the lithium ion battery, because the battery bulge does not represent the fire condition of the battery, but only the gas expansion condition inside the battery, in order to more reasonably and environmentally protect and explosion-proof the lithium ion battery, the above problem needs to be solved.

Disclosure of Invention

The utility model aims to solve the problems and provide an environment-friendly explosion-proof lithium ion battery.

In order to achieve the above object, the present utility model provides the following technical solutions:

the utility model relates to an environment-friendly explosion-proof lithium ion battery, which comprises:

the anti-explosion shell is of two groups of shell structures which are symmetrically arranged, the two groups of anti-explosion shells are mutually buckled to form a box body, and a lithium ion battery cell body is arranged in the box body formed by the two groups of anti-explosion shells;

an internal support structure disposed inside the explosion proof housing;

an anti-gassing structure disposed on the internal support structure to prevent gassing of the lithium ion battery cell body;

and the leakage observation mechanism is arranged on the explosion-proof shell so as to observe the leakage condition of the lithium ion battery cell body.

Preferably, the internal support structure comprises:

the strip-shaped supporting protrusions are arranged on the bottom surface of the inner side of the explosion-proof housing, and the number of the strip-shaped supporting protrusions is multiple, and the strip-shaped supporting protrusions are parallel to each other and distributed at intervals.

Preferably, the anti-flatulence structure comprises:

the ejector pins are arranged on each group of the strip-shaped supporting protrusions, and the plurality of groups of ejector pins are uniformly distributed along the extending direction of the strip-shaped supporting protrusions.

Preferably, the anti-flatulence structure further comprises an exhaust hole which is arranged on the side surface of the explosion-proof shell, and a one-way valve is embedded in the exhaust hole.

Preferably, the leakage observation mechanism includes:

the assembly groove is formed in the side surface of the explosion-proof shell, transparent glass is embedded in the assembly groove, and the transparent glass and the strip-shaped supporting protrusions are mutually perpendicular;

the liquid-absorbing sponge is arranged between every two adjacent groups of strip-shaped supporting protrusions;

the openings are formed in the side surface of the explosion-proof shell and are communicated with the assembly grooves, one end of the liquid-absorbing sponge extends into the openings, and the plurality of openings are arranged in a one-to-one correspondence with the liquid-absorbing sponge;

and the color development top is arranged in the opening and attached to the transparent glass, and the liquid absorption sponge extending into the opening is attached to the color development top.

Preferably, the chromogenic plug is a PH test paper.

Preferably, the height of the liquid absorbing sponge is higher than the tail end height of the thimble, and the lithium ion battery cell body is clamped between two groups of liquid absorbing sponge in the two groups of explosion-proof shells.

In the technical scheme, the environment-friendly explosion-proof lithium ion battery provided by the utility model has the following beneficial effects:

the explosion-proof shell loads the lithium ion battery cell body, prevents through preventing expanding gas structure that the battery continues to expand when lithium ion battery cell body bloated and swells, kills the serious result that will lead to with the battery swell in the bud state to whether the weeping condition appears in the lithium battery through weeping observation mechanism can be observed, make safe observation and preparation in advance, avoid the lithium battery to take place dangerous situation, have fine explosion-proof effect, then also avoid the pollution to the environment that leads to because of circumstances such as battery explosion, have fine environmental protection effect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

Fig. 1 is a schematic structural diagram of an environment-friendly explosion-proof lithium ion battery according to an embodiment of the utility model;

fig. 2 is a side sectional view of an environment-friendly explosion-proof lithium ion battery according to an embodiment of the utility model;

fig. 3 is an internal top view of an explosion-proof housing of an environment-friendly explosion-proof lithium ion battery according to an embodiment of the utility model.

Reference numerals illustrate:

1. an explosion-proof housing; 2. a lithium ion battery cell body; 3. a bar-shaped supporting protrusion; 4. a thimble; 5. an exhaust hole; 6. a one-way valve; 7. an assembly groove; 8. transparent glass; 9. a liquid-absorbing sponge; 10. an opening; 11. and (5) a color development plug.

Detailed Description

In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1-3, an environment-friendly explosion-proof lithium ion battery, comprising:

the explosion-proof housing 1 is of two groups of symmetrically arranged housing structures, the two groups of explosion-proof housings 1 are mutually buckled to form a box body, and a lithium ion battery cell body 2 is arranged in the box body formed by the two groups of explosion-proof housings 1; namely, the explosion-proof housing 1 is used as a protective housing of the lithium ion battery cell body 2 to play a role in protecting the lithium ion battery cell body 2;

the inner supporting structure is arranged inside the explosion-proof housing 1, and is used as a supporting framework to be combined with the explosion-proof housing 1 to play a role in reinforcing the explosion-proof housing 1;

the anti-expanding structure is arranged on the internal supporting structure to prevent the expansion of the lithium ion battery cell body 2; explosion caused by excessive expansion of the battery is prevented;

and the leakage observing mechanism is arranged on the explosion-proof housing 1 to observe the leakage condition of the lithium ion battery cell body 2, so that early warning can be performed in advance, and the environmental pollution, explosion and other dangerous cases caused by battery leakage are prevented.

In summary, the explosion-proof housing loads the lithium ion battery cell body and supports the lithium ion battery cell body by the inside bearing structure, prevent through preventing expanding gas structure that the battery continues to expand when the expanding of lithium ion battery cell body is swelled, with the serious result that the battery swell will lead to kill in the bud state, and whether the weeping condition appears in the lithium battery can be observed through weeping observation mechanism, make safe observation and preparation in advance, avoid the lithium battery to take place dangerous situation, have fine explosion-proof effect, also avoid the pollution to the environment that leads to because of circumstances such as battery explosion then, have fine environmental protection effect.

Further, the internal support structure includes:

and strip-shaped supporting protrusions 3 which are arranged on the inner bottom surface of the explosion-proof housing 1, wherein the number of the strip-shaped supporting protrusions 3 is a plurality of and mutually parallel and mutually spaced.

Further, the anti-flatulence structure comprises:

the ejector pins 4 are arranged on each group of strip-shaped supporting protrusions 3, and the groups of ejector pins 4 are uniformly distributed along the extending direction of the strip-shaped supporting protrusions 3.

The strip-shaped supporting protrusions 3 in the inner supporting structure also play a supporting role on the thimble 4. When the ejector pin 4 can expand the gas of the lithium ion battery cell body 2, the outer surface of the lithium ion battery cell body 2 is passively punctured to exhaust due to the fact that the lithium ion battery cell body 2 expands in volume to contact with the ejector pin 4.

Further, the anti-flatulence structure also comprises an exhaust hole 5 which is arranged on the side surface of the explosion-proof housing 1, and a one-way valve 6 is embedded in the exhaust hole 5. The outer surface of the lithium ion battery cell body 2 is passively punctured to exhaust, so that gas is discharged through the exhaust hole 5, and the inside of the explosion-proof housing 1 is prevented from entering air and the like on the premise that the one-way valve 6 can exhaust.

Further, the liquid leakage observation mechanism includes:

the assembly groove 7 is formed in the side surface of the explosion-proof housing 1, transparent glass 8 is embedded in the assembly groove 7, and the transparent glass 8 and the strip-shaped supporting protrusions 3 are mutually perpendicular;

the liquid-absorbing sponge 9 is arranged between every two adjacent groups of strip-shaped supporting protrusions 3;

the openings 10 are formed in the side surface of the explosion-proof housing 1 and are communicated with the assembly grooves 7, one end of the liquid-absorbing sponge 9 extends into the openings 10, and the plurality of the openings 10 are arranged in a one-to-one correspondence with the liquid-absorbing sponge 9;

and a color-developing plug 11 which is provided inside the opening 10 and is attached to the transparent glass 8, and a liquid-absorbing sponge 9 which extends into the opening 10 is attached to the color-developing plug 11.

Specifically, the liquid-absorbing sponge 9 has the property of absorbing the leakage of the battery, and permeates the leakage to the color-developing plug 11 after absorbing the leakage, and the color-developing plug 11 contacts the leakage for color development so as to observe whether the leakage is observed through the transparent glass 8 for warning and processing in advance.

Further, the chromogenic plug 11 is a pH test paper. The PH paper changes color when it meets battery leakage, which is well known to those skilled in the art and will not be described in detail herein. And the test paper is not limited to PH test paper, and can be other test papers which can change color when encountering battery leakage.

Further, the height of the liquid absorbing sponge 9 is higher than the tail end height of the thimble 4, and the lithium ion battery cell body 2 is clamped between the two groups of liquid absorbing sponge 9 in the two groups of explosion-proof shells 1. That is, the lithium ion battery cell body 2 is supported and clamped by two groups of liquid absorbing sponges 9 in the two groups of explosion-proof shells 1, under the condition that the lithium ion battery cell body 2 is normally filled and does not bulge, the liquid absorbing sponges 9 are extruded to deform after bulge, paper contacts the thimble 4, then the surface of the paper is passively punctured by the thimble 4 to exhaust, meanwhile, leakage is observed through a leakage observation mechanism, and warning treatment is performed in advance, so that battery explosion and environmental pollution are avoided, and the lithium battery is more environment-friendly and safer.

While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.

Claims

1. An environmentally friendly explosion-proof lithium ion battery, comprising:

the anti-explosion shell (1) is of two groups of shell structures which are symmetrically arranged, the two groups of anti-explosion shells (1) are mutually buckled to form a box body, and a lithium ion battery cell body (2) is arranged in the box body formed by the two groups of anti-explosion shells (1);

an internal support structure, which is arranged inside the explosion-proof housing (1);

an anti-gassing structure disposed on the internal support structure to prevent gassing of the lithium ion battery cell body (2);

the leakage observation mechanism is arranged on the explosion-proof shell (1) so as to observe the leakage condition of the lithium ion battery cell body (2);

the internal support structure includes:

the strip-shaped supporting protrusions (3) are arranged on the inner bottom surface of the explosion-proof shell (1), and the number of the strip-shaped supporting protrusions (3) is multiple, and the strip-shaped supporting protrusions are parallel to each other and are distributed at intervals;

the anti-flatulence structure comprises:

the ejector pins (4) are arranged on each group of the strip-shaped supporting protrusions (3), and the ejector pins (4) are uniformly distributed along the extending direction of the strip-shaped supporting protrusions (3);

the anti-flatulence structure also comprises an exhaust hole (5) which is arranged on the side surface of the anti-explosion shell (1), and a one-way valve (6) is embedded in the exhaust hole (5);

the leakage observation mechanism includes:

the assembly groove (7) is formed in the side surface of the explosion-proof housing (1), transparent glass (8) is embedded in the assembly groove (7), and the transparent glass (8) and the strip-shaped supporting protrusions (3) are mutually perpendicular;

the liquid absorbing sponge (9) is arranged between every two adjacent groups of strip-shaped supporting protrusions (3);

the opening (10) is formed in the side surface of the explosion-proof shell (1) and is communicated with the assembly groove (7), one end of the liquid-absorbing sponge (9) extends into the opening (10), and the plurality of openings (10) are arranged in a one-to-one correspondence with the liquid-absorbing sponge (9);

and a color development top (11) which is arranged in the opening (10) and is attached to the transparent glass (8), wherein the liquid absorption sponge (9) which stretches into the opening (10) is attached to the color development top (11).

2. The environment-friendly explosion-proof lithium ion battery according to claim 1, wherein the chromogenic plug (11) is a PH test paper.

3. An environment-friendly explosion-proof lithium ion battery according to claim 1, wherein the height of the liquid absorbing sponge (9) is higher than the tail end height of the ejector pin (4), and the lithium ion battery cell body (2) is clamped between two groups of liquid absorbing sponge (9) in two groups of explosion-proof shells (1).