CN210897445U

CN210897445U - Lithium battery explosion test protective box

Info

Publication number: CN210897445U
Application number: CN201922425368.3U
Authority: CN
Inventors: 高忠
Original assignee: Jiangxi Neutron Energy Co ltd
Current assignee: Jiangxi Neutron Energy Co ltd
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2020-06-30
Anticipated expiration: 2029-12-28

Abstract

The utility model provides a lithium cell explosion test protective housing belongs to battery testing technique field, including protective box body subassembly and pressure release subassembly, pressure release unit mount is in protective box body subassembly's inside, and the pressure release chamber link up and sets up in the top surface of interior case lid, and the fixed encapsulation in the top outside in pressure release chamber is filled in to the shutoff, and ventilative apron fixed mounting is in the bottom in pressure release chamber, places the pressure release intracavity portion in the piston activity, and spring fixed connection piston top and the other end are fixed in the shutoff and block up, and the lid surface and link up in pressure release chamber in the passageway that loses heart is seted up in. The utility model discloses a set up the piston and lose heart the passageway, the spring that the piston is connected with the top is packed in pressure release chamber by shutoff stopper and ventilative apron among, and the inner box battery explosion produces the impact force and can upwards dash the piston, dashes the high pressure discharge in the disappointing passageway that exposes after, reduces the inside pressure of inner box, avoids the inner box in the high pressure produce danger, is applicable to the production and the use of lithium cell explosion test protecting box.

Description

Lithium battery explosion test protective box

Technical Field

The utility model relates to a battery detects technical field, specifically is an experimental guard box.

Background

At present, rechargeable batteries such as lithium ion batteries are widely applied to mobile phones, toys, electric bicycles or other daily necessities, and China is a large country for producing and selling rechargeable batteries and has huge export quantity. The safety risk of the battery is directly related to the safety of consumers, and according to the standard requirements of a lithium ion battery detection test method, when the lithium ion battery is subjected to a fire hazard or explosion danger safety test, the rechargeable battery needs to be subjected to danger tests such as overcharge, overdischarge and short circuit, and the like. Because the inside of the existing explosion-proof test box can not be timely decompressed when the existing explosion-proof test box is used for a heating and pressurizing test, the risk of explosion can occur when the air pressure intensity in the test box is too high, and certain danger exists. Therefore, the protection box for the lithium battery explosion test is required to be upgraded and transformed on the basis of the existing explosion test protection box device so as to overcome the existing problems and defects.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at solving current explosion proof test case when carrying out dangerous tests such as the battery overcharge, overdischarge and short circuit, can not be timely carry out the pressure release to inside, the battery explosion accident of starting a fire takes place many times, has threatened the technical problem of experimenter and test equipment's safety, provides a lithium cell explosion test protective housing.

In order to achieve the above object, the utility model provides a following technical scheme: a lithium battery explosion test protection box comprises a protection box body assembly and a pressure relief assembly, wherein the pressure relief assembly is arranged inside the protection box body assembly;

the pressure relief assembly comprises a sealing plug, a spring, a piston, a pressure relief cavity, an air leakage channel and an air permeable cover plate, the pressure relief cavity is arranged on the top end surface of the inner box cover in a penetrating mode, the sealing plug is fixedly packaged on the outer side of the top of the pressure relief cavity, the air permeable cover plate is fixedly mounted at the bottom of the pressure relief cavity, the piston is movably arranged in the pressure relief cavity, the spring is fixedly connected with the top end of the piston, the other end of the spring is fixed to the sealing plug, and the air leakage channel is arranged on the surface of the inner box cover and;

the protection box subassembly includes the outer container, the inner box, the heelpiece, the outer case lid, compression screw, the bolster, connect claw spare, the inner box lid, explosion-proof cylinder mould, the spliced pole, the inner box lid is followed, through-hole and sealing washer, place in the outer container in the inner box among, explosion-proof cylinder mould lays and installs in the inside of inner box, the heelpiece is installed in the inner box bottom and is connected inside the outer container, the through-hole is seted up in a side surface of inner box, bolster erection joint is between the inner box outside and outer container inner wall, outer container lid movable cover is adorned on outer container top and the bottom is connected the inner box lid by the spliced pole, the inner box lid sets up in the edge department of inner box lid along the embedding, the sealing washer is fixed to be bonded along inboard in the inner box lid, connect claw spare swing joint in the.

As a further aspect of the present invention: the air leakage channel is L-shaped and bent to penetrate through the surface of the inner box cover and is connected to the pressure leakage cavity, and the air leakage channel is connected with the pressure leakage cavity body and is provided with a plurality of channels with different heights.

As a further aspect of the present invention: and a spring connected with the top of the piston is sealed in the pressure relief cavity by a sealing plug and a ventilation cover plate.

As a further aspect of the present invention: a clamping groove assembly is reserved between the outer box cover and the outer box, and a certain space is reserved by incomplete closed covering after installation.

As a further aspect of the present invention: the buffer parts are symmetrically arranged at the center between the two sides of the inner box and the outer box for supporting.

As a further aspect of the present invention: the length of the connecting column between the outer box cover and the inner box cover is larger than the distance between the box openings of the outer box and the inner box.

As a further aspect of the present invention: the explosion-proof net cage is paved and covered in the inner wall of the inner box body, and the material of the explosion-proof net cage is 316L stainless steel.

The utility model has the advantages that:

1. the utility model discloses in set up the passageway that loses heart, the spring that the piston is connected with the top is packed in pressure release chamber by shutoff stopper and ventilative apron among for can be with piston upswept after the inside battery explosion of inner box produces the impact force, the piston of jack-up can extrude the spring, and the rethread reduces the pressure of inner box inside in losing heart the passageway that exposes behind the compression of spring and discharge the high pressure, avoids the inner box in the high pressure production danger.

2. This kind of lithium battery explosion test protective housing's advantage lies in being provided with explosion-proof cylinder mould, and explosion-proof cylinder mould lays and covers among the inner wall of inner box, and explosion-proof cylinder mould material is 316L stainless steel, and the explosion-proof cylinder mould of 316L stainless steel material can effectively block the piece that the battery flew out after exploding, reduces and produces huge impact to the box when the explosion.

3. This kind of lithium battery explosion test protective housing is provided with outer case lid and interior case lid, spliced pole length between outer case lid and the interior case lid is greater than the case mouth junction interval of outer case and inner box for the housing washer at top also produces the fastening extrusion between the inner box lid of bottom and the inner box when compressing tightly to outer case lid, make interior case lid also with inner box zonulae occludens, make the inner box form good zonulae occludens state, can be better through the pressure release chamber pressure release.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the inner box structure of the present invention.

Fig. 3 is a schematic view of the top cover structure of the present invention.

Fig. 4 is the schematic view of the top cover structure of the present invention.

In FIGS. 1-4: 1-outer box, 2-inner box, 3-bottom pad, 4-outer box cover, 5-compression screw, 6-buffer piece, 7-connecting claw piece, 8-inner box cover, 9-explosion-proof net cage, 10-sealing plug, 11-connecting column, 12-inner box cover edge, 13-through hole, 14-sealing ring, 15-spring, 16-piston, 17-pressure relief cavity, 18-air relief channel and 19-air relief cover plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

Referring to fig. 1 to 4, in an embodiment of the present invention, a lithium battery explosion test protection box includes a protection box body assembly and a pressure relief assembly, wherein the pressure relief assembly is installed inside the protection box body assembly;

the pressure relief assembly comprises a sealing plug 10, a spring 15, a piston 16, a pressure relief cavity 17, an air relief channel 18 and a ventilation cover plate 19, the pressure relief cavity 17 is arranged on the top end surface of the inner box cover 8 in a penetrating manner, the sealing plug 10 is fixedly packaged on the outer side of the top of the pressure relief cavity 17, the ventilation cover plate 19 is fixedly mounted at the bottom of the pressure relief cavity 17, the piston 16 is movably arranged in the pressure relief cavity 17, the spring 15 is fixedly connected with the top end of the piston 16, the other end of the spring 15 is fixed on the sealing plug 10, the air relief channel 18 is arranged on the surface of the inner box cover 8 and is connected with the pressure relief cavity 17 in a penetrating manner, the spring 15 connected with the top of the piston 16 is packaged in the pressure relief cavity 17 by the sealing plug 10 and the ventilation cover plate 10, so that the piston 16 can be upwards punched after the battery in the inner box 2 explodes to generate impact force, the upwards punched piston 16 can extrude the spring, the pressure inside the inner box 2 is reduced, and the danger caused by overhigh pressure in the inner box 2 is avoided;

the protective box body component comprises an outer box 1, an inner box 2, a bottom pad 3, an outer box cover 4, a compression screw 5, a buffer piece 6, a connecting claw piece 7, an inner box cover 8, an explosion-proof net cage 9, a connecting column 11, an inner box cover edge 12, a through hole 13 and a sealing ring 14, wherein the inner box 2 is arranged in the outer box 1, the explosion-proof net cage 9 is laid and installed inside the inner box 2, the explosion-proof net cage 9 is laid and covered inside the inner wall of the box body of the inner box 2, the explosion-proof net cage 9 is made of 316L stainless steel, the explosion-proof net cage 9 made of 316L stainless steel can effectively block fragments flying out after the explosion of a battery and reduce the huge impact on the box body during explosion, the bottom pad 3 is installed at the bottom of the inner box 2 and connected inside the outer box 1, the through hole 13 is opened on one side surface of the inner box 2, the buffer piece 6 is installed and connected between the outer side of the inner box 2 and the inner wall of the outer box 1, the top end, interior case lid sets up in the edge of interior case lid 8 along 12 embeddings, spliced pole 11 length between outer case lid 4 and the interior case lid 8 is greater than the case mouth junction interval of outer case 1 and inner box 2, make the clamp bolt 5 at top also produce the fastening extrusion between inner box lid 8 and the inner box 2 to the bottom when compressing tightly outer case lid 4, make interior case lid 8 also with inner box 2 zonulae occludens, make inner box 2 form good zonulae occludens state, can be better through the pressure release chamber 17 pressure release, sealing washer 14 is fixed bonds along 12 inboards in interior case lid, connecting claw spare 7 swing joint is in outer case 1, the top of 5 movable butt outer case lids 4 of clamp screw.

Wherein, the passageway 18 of disappointing is the L shape and buckles the surface that the form link up interior case lid 8 and connect in pressure release chamber 17, and the passageway that passageway 18 of disappointing connects pressure release chamber 17 cavity is a plurality of and the height differs, can play the effect of effective pressure release to the high pressure of inside through the passageway 18 of disappointing of a plurality of.

Wherein, leave the draw-in groove subassembly between outer container lid 4 and the outer container 1, the installation back is not totally closed to cover and leaves certain space, and the space of leaving makes experimental power cord with connecting the battery can be followed the gap and is connected.

Wherein, 6 symmetrical centre departments of installing between inner box 2 and outer container 1 both sides of bolster support play the vibrations buffering after 2 explosions of inner box, avoid inner box 2 striking outer container 1.

Wherein, the buffer member 6 is made of a compression spring.

The working principle is as follows: firstly, a test battery is put into an inner box 2, a charging wire is plugged into the inner box 2 through a through hole 1 to be connected with the test battery, then an outer box cover 4 is covered on the outer box 1, so that an inner box cover 8 connected by a connecting column 11 is covered on an opening at the top of the inner box 2, an inner box cover edge 12 is attached to an opening of the inner box 2 through a sealing ring 14 at the bottom, then the inner box cover edge 12 is connected with the outer box 1 through a connecting claw piece 7 and then is adjusted and fastened to the outer box cover 4 through a pressing screw rod 5, after the inner box cover 8 at the bottom of the outer box cover 4 is stressed, the inner box cover edge 12 is tightly closed to the opening of the inner box 2 through the sealing ring 14 at the bottom, so that the four walls in the inner box 2 form good protection, then a power supply is connected for battery test, when the inner battery explodes, an experimenter records experimental data, the impact force generated by the explosion can punch up a piston 16 through an upward air, high pressure is discharged from the air leakage channel 18 exposed after the compression of the spring 15, the pressure inside the inner box 2 is reduced, danger caused by overhigh pressure in the inner box 2 is avoided, the explosion-proof net cage 9 in the inner box 2 can block fragments flying out after the explosion of the battery, great impact on the box body during explosion is reduced, the buffer parts 6 on the two sides of the inner box 2 play a role in shock buffering after the explosion, the inner box 2 is prevented from impacting the outer box 1, and the protection effect is good.

Claims

1. A lithium battery explosion test protection box comprises a protection box body assembly and a pressure relief assembly, wherein the pressure relief assembly is arranged inside the protection box body assembly;

the method is characterized in that: the pressure relief assembly comprises a sealing plug (10), a spring (15), a piston (16), a pressure relief cavity (17), an air leakage channel (18) and an air permeable cover plate (19), the pressure relief cavity (17) is communicated with the top end surface of the inner box cover (8), the sealing plug (10) is fixedly packaged on the outer side of the top of the pressure relief cavity (17), the air permeable cover plate (19) is fixedly installed at the bottom of the pressure relief cavity (17), the piston (16) is movably arranged in the pressure relief cavity (17), the spring (15) is fixedly connected with the top end of the piston (16) and the other end of the piston (16) is fixed on the sealing plug (10), and the air leakage channel (18) is arranged on the surface of the inner box cover (8) and is communicated with the pressure relief cavity;

the protective box body component comprises an outer box (1), an inner box (2), a bottom pad (3), an outer box cover (4), a compression screw (5), a buffer piece (6), a connecting claw piece (7), an inner box cover (8), an explosion-proof net cage (9), a connecting column (11), an inner box cover edge (12), a through hole (13) and a sealing ring (14), wherein the inner box (2) is arranged in the outer box (1), the explosion-proof net cage (9) is laid and installed in the inner part of the inner box (2), the bottom pad (3) is installed at the bottom of the inner box (2) and connected to the inner part of the outer box (1), the through hole (13) is arranged on one side surface of the inner box (2), the buffer piece (6) is installed and connected between the outer side of the inner box (2) and the inner wall of the outer box (1), the outer box cover (4) is movably covered at the top end of the outer box (1) and the bottom of the inner box cover (8) is connected with the connecting column, the sealing ring (14) is fixedly adhered to the inner side of the inner box cover edge (12), the connecting claw piece (7) is movably connected to the outer box (1), and the compression screw (5) is movably abutted to the top end of the outer box cover (4).

2. The lithium battery explosion test protective box according to claim 1, characterized in that: the air leakage channel (18) is L-shaped and bent to penetrate through the surface of the inner box cover (8) and is connected to the pressure leakage cavity (17), and the air leakage channel (18) is connected with the pressure leakage cavity (17) and is provided with a plurality of channels with different heights.

3. The lithium battery explosion test protective box according to claim 1, characterized in that: the piston (16) and a spring (15) connected with the top are sealed in the pressure relief cavity (17) by a sealing plug (10) and a gas-permeable cover plate (19).

4. The lithium battery explosion test protective box according to claim 1, characterized in that: a clamping groove assembly is reserved between the outer box cover (4) and the outer box (1), and a certain space is reserved after the outer box cover is installed and is not completely closed and covered.

5. The lithium battery explosion test protective box according to claim 1, characterized in that: the buffer parts (6) are symmetrically arranged at the center between the two sides of the inner box (2) and the outer box (1) for supporting.

6. The lithium battery explosion test protective box according to claim 1, characterized in that: the length of a connecting column (11) between the outer box cover (4) and the inner box cover (8) is larger than the distance between the box opening connecting parts of the outer box (1) and the inner box (2).

7. The lithium battery explosion test protective box according to claim 1, characterized in that: the explosion-proof net cage (9) is paved and covered in the inner wall of the box body of the inner box (2), and the material of the explosion-proof net cage (9) is 316L stainless steel.