CN217466380U

CN217466380U - Battery internal gas sampling device

Info

Publication number: CN217466380U
Application number: CN202220987361.XU
Authority: CN
Inventors: 刘应春; 詹新举; 肖长喜; 王媛; 刘萌萌
Original assignee: Wuhu Etc Battery Ltd
Current assignee: Wuhu Etc Battery Ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-09-20
Anticipated expiration: 2032-04-26

Abstract

The utility model discloses an inside gaseous sampling device of battery relates to gaseous sampling technical field, including chassis and gas storage storehouse, the lower extreme of gas storage storehouse is connected with manual valve one, the metal syringe needle is installed to the lower extreme of manual valve one, the metal syringe needle is pegged graft on sealed rubber mat, and the upper end butt of sealed rubber mat is in the lower terminal surface of manual valve one, sliding connection has the piston in the gas storage storehouse, be equipped with the gas production mouth that feeds through in the gas storage storehouse on the piston, the gas production mouth passes through the plug and seals, the lateral wall of gas storage storehouse is connected with manual valve two, the end of manual valve two passes through hose connection on the vacuum pump, the gas storage storehouse is through installing the drive arrangement drive on the chassis and carry out gas collection work. The utility model utilizes the negative pressure to extract the gas in the battery into the gas storage bin, effectively eliminates the interference of air through the sealing rubber gasket, and improves the accuracy of collection; the gas that the gas storage storehouse can be collected is preserved, the multiple test research of being convenient for and gas storage storehouse can carry out gas collection many times.

Description

Battery internal gas sampling device

Technical Field

The utility model relates to a gaseous sampling technical field, concretely relates to inside gaseous sampling device of battery.

Background

The thermal runaway of the power battery is one of the main causes of spontaneous combustion, fire and explosion of the electric automobile. For lithium ion power batteries, a certain amount of gas is produced under normal cycling and abuse conditions such as overcharge and overdischarge. A series of chain type exothermic reactions occur in the power battery under the abuse condition, so that the temperature is continuously increased; meanwhile, the internal pressure of the battery is increased by gas generation in the use process of the battery, and the thermal runaway of the battery is caused by the aggravation of combustible gas in gas generation components. In addition, the thermal runaway of the battery generates a large amount of combustible gas and toxic gas, which causes serious harm to both personnel and the environment. Therefore, the gas inside the power battery needs to be collected and analyzed in the production process of the power battery.

Traditional gaseous sampling instrument adopts the sample bag to gather more, and the syringe needle can get into the air when gathering the inside gas of battery, influences the test analysis result of final gas composition, and the sample bag is inconvenient to carry out a lot of samplings to power battery. Therefore, a device for sampling gas inside a battery is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an inside gaseous sampling device of battery to solve the above-mentioned multinomial defect that leads to among the prior art.

The utility model provides a gaseous sampling device in battery, includes chassis and gas storage bin, the lower extreme of gas storage bin is connected with manual valve one, the metal syringe needle is installed to manual valve one's lower extreme, the metal syringe needle pegs graft on sealed rubber mat, and the upper end butt of sealed rubber mat in the lower terminal surface of manual valve one, sliding connection has the piston in the gas storage bin, be equipped with the gas production mouth that communicates in the gas storage bin on the piston, the gas production mouth passes through the plug and seals, the lateral wall of gas storage bin is connected with manual valve two, the end of manual valve two passes through hose connection on the vacuum pump, the gas storage bin drives and carries out gas collection work through the drive arrangement who installs on the chassis.

Preferably, drive arrangement is including installing the support frame on the chassis, be equipped with the guide arm on the support frame, sliding connection has the mount table on the guide arm, install slip table cylinder one on the mount table, the output of slip table cylinder one is connected with the bearing board, the gas storage bin is installed on the bearing board, the cylinder is installed to the upper end of support frame, the output of cylinder is connected in one side of mount table to promote the mount table and carry out reciprocating motion along the guide arm.

Preferably, draw-in groove one is installed to the upper end of chassis, just be located draw-in groove one side on the chassis and install slip table cylinder two, draw-in groove two is installed to the output of slip table cylinder two, draw-in groove one with two cooperation clamps of draw-in groove hold electric core.

Preferably, a supporting bracket for supporting the sealing rubber gasket is mounted at the upper end of the underframe.

Preferably, the upper end of the battery cell is provided with an explosion-proof valve, and the metal needle head collects gas inside the battery cell by puncturing the explosion-proof valve and through the gas storage bin.

The utility model has the advantages that: the utility model discloses a sealed cushion seals the metal syringe needle, manually open manual valve one and manual valve two and start the vacuum pump and carry out the evacuation to the gas storage bin, close manual valve one and manual valve two, it moves down to start first promotion gas storage bin of slip table cylinder, behind the sealed cushion butt explosion-proof valve, continue to move down the gas storage bin and make the metal syringe needle expose and puncture the explosion-proof valve, open manual valve one after that, make the inside gas compression of electric core advance the gas storage bin, use the valve injector to pierce through the plug afterwards, absorb gas and use the chromatograph to carry out the analysis to the gas of absorption. The utility model utilizes the negative pressure to extract the gas in the battery into the gas storage bin, effectively eliminates the interference of air through the sealing rubber gasket, and improves the accuracy of collection; the gas that the gas storage storehouse can be collected is preserved, the multiple test research of being convenient for and gas storage storehouse can carry out gas collection many times.

Drawings

Fig. 1 and fig. 2 are schematic structural diagrams of the whole body of the present invention with different viewing angles.

Fig. 3 is a schematic structural view of the gas storage bin of the present invention.

Wherein: 1-a chassis; 2-gas storage; 3-a manual valve I; 4-metal needle; 5-sealing the rubber gasket; 6-a piston; 7-gas extraction port; 8-rubber plug; 9-manual valve II; 10-a drive device; 11-a support frame; 12-a guide rod; 13-mounting a table; 14-a sliding table cylinder I; 15-a support plate; 16-a cylinder; 17-a first clamping groove; 18-a second sliding table cylinder; 19-card slot two; 20-electric core; 21-a support bracket; 22-explosion-proof valve.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1 to 3, the device for sampling gas inside a battery comprises an underframe 1 and a gas storage bin 2, wherein the lower end of the gas storage bin 2 is connected with a first manual valve 3, a metal needle 4 is installed at the lower end of the first manual valve 3, the metal needle 4 is inserted into a sealing rubber gasket 5, the upper end of the sealing rubber gasket 5 abuts against the lower end face of the first manual valve 3, a piston 6 is connected in the gas storage bin 2 in a sliding manner, a gas production port 7 communicated with the gas storage bin 2 is formed in the piston 6, the gas production port 7 is sealed through a rubber plug 8, the side wall of the gas storage bin 2 is connected with a second manual valve 9, the tail end of the second manual valve 9 is connected to a vacuum pump through a hose, and the gas storage bin 2 is driven by a driving device 10 installed on the underframe 1 to collect gas. The sealing rubber cushion prevents residual air in the metal needle 4 from influencing gas collection, the rubber plug 8 can be punctured by a valve sample injector for a plurality of times for sampling gas in the gas storage bin 2, so that various test researches are facilitated, the sealing rubber pad 5 and the rubber plug 8 need to be replaced before measurement, the bottom side of the sealing rubber pad 5 is provided with a radian, the contact area is reduced, the sealing rubber pad 5 and the explosion-proof valve 22 are prevented from being wrapped by outside air, after the metal needle 4 pierces the explosion-proof valve 22, air enters to affect the purity of gas collection, the side wall of the gas storage bin 2 is provided with a transparent window and scales of the lowest point and the highest point to which the piston 6 moves, judging the gas collecting condition through the scales, manually closing the first manual valve 3 and the second manual valve 9 when the piston 6 is at the bottom scale, when the piston 6 is at the highest scale, gas sampling is performed by the valve injector piercing the plug 8.

In this embodiment, drive arrangement 10 is including installing support frame 11 on chassis 1, be equipped with guide arm 12 on support frame 11, sliding connection has mount table 13 on guide arm 12, install a slip table cylinder 14 on mount table 13, the output of a slip table cylinder 14 is connected with bearing board 15, gas storage bin 2 installs on bearing board 15, cylinder 16 is installed to the upper end of support frame 11, cylinder 16's output is connected in one side of mount table 13 to promote mount table 13 and carry out reciprocating motion along guide arm 12.

In this embodiment, draw-in groove 17 is installed to the upper end of chassis 1, chassis 1 is last and is located draw-in groove 17 one side and installs two slip table cylinders 18, two draw-in grooves 19 are installed to the output of two slip table cylinders 18, draw-in groove 17 with two 19 cooperation clamps of draw-in groove hold electric core 20.

In this embodiment, a support bracket 21 for supporting the sealing rubber pad 5 is mounted on the upper end of the chassis 1.

In the present embodiment, the upper end of the battery cell 20 is provided with an explosion-proof valve 22, and the metal needle 4 collects gas inside the battery cell 20 by puncturing the explosion-proof valve 22 and passing through the gas storage bin 2.

The utility model discloses a theory of operation does: before testing, a new sealing rubber pad 5 is placed in a support bracket 21, then an air cylinder 16 is started to push an installation table 13 to move along a guide rod 12, a metal needle 4 is opposite to the position of the sealing rubber pad 5, a sliding table air cylinder 14 is started to push a support plate 15 to move downwards, the metal needle 4 is further penetrated into the sealing rubber pad 5, the upper end of the sealing rubber pad 5 is abutted to the lower end of a manual valve I3, meanwhile, air is sent into a gas storage bin 2 through an external vacuum pump, a piston 6 reaches the top end of the gas storage bin 2, then a rubber plug 8 is replaced, then the gas storage bin 2 is reset, a battery cell 20 is installed in a clamping groove I17, then a sliding table air cylinder II 18 is started to drive a clamping groove II 19 to move and clamp the battery cell 20 in cooperation with the clamping groove I17, the gas storage bin 2 is vacuumized through the vacuum pump, when the piston 6 reaches the bottommost side of the gas storage bin 2, the manual valve I3 and the manual valve II 4 are manually closed, start the first 14 promotion metal syringe needles 4 of slip table cylinder and move down, and with 5 butt explosion-proof valve 22 backs of sealed cushion, continue to move down supporting plate 15 and make metal syringe needles 4 pass sealed cushion 5 and explosion-proof valve 22 and get into inside electric core 20, manually open manual valve 3 afterwards and pass through the negative pressure with the inside gas of electric core 20 and impress in the gas storage storehouse 2, when piston 6 reachs the highest position of gas storage storehouse 2, pierce the gas that the plug 8 extraction gas storage storehouse 2 was sampled through valve type injector, and carry out the analysis through the gas of chromatograph to the sampling.

The utility model discloses a sealed cushion 5 seals metal needle 4, manually open manual valve one 3 and two 9 of manual valve and start the vacuum pump and carry out the evacuation to gas storage bin 2, close manual valve one 3 and two 9 of manual valve, start the slip table cylinder one 14 and promote gas storage bin 2 and move down, sealed cushion 5 butt explosion-proof valve 22 back, continue to move down gas storage bin 2 and make metal needle 4 expose and puncture explosion-proof valve 22, open manual valve one 3 after that, make the inside gas compression of electricity core 20 advance gas storage bin 2, use the valve injector to pierce through plug 8 afterwards, absorb gas and use the chromatograph to carry out the analysis to the gas of absorption. The utility model utilizes the negative pressure to extract the gas in the battery into the gas storage bin, effectively eliminates the interference of air through the sealing rubber mat 5, and improves the accuracy of collection; the gas that gas storage bin 2 can be collected is preserved, and the gas storage bin can carry out gas collection many times of the multiple test research of being convenient for.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.

Claims

1. The utility model provides a gaseous sampling device in battery which characterized in that: comprises an underframe (1) and a gas storage bin (2), the lower end of the gas storage bin (2) is connected with a first manual valve (3), the lower end of the manual valve I (3) is provided with a metal needle head (4), the metal needle head (4) is inserted on the sealing rubber mat (5), the upper end of the sealing rubber gasket (5) is abutted against the lower end face of the first manual valve (3), a piston (6) is connected in the gas storage bin (2) in a sliding way, a gas collecting port (7) communicated with the gas storage bin (2) is arranged on the piston (6), the gas collecting port (7) is sealed by a rubber plug (8), the side wall of the gas storage bin (2) is connected with a second manual valve (9), the tail end of the second manual valve (9) is connected to a vacuum pump through a hose, and the gas storage bin (2) is driven by a driving device (10) arranged on the bottom frame (1) and performs gas collection.

2. The battery internal gas sampling device of claim 1, wherein: drive arrangement (10) is including installing support frame (11) on chassis (1), be equipped with guide arm (12) on support frame (11), sliding connection has mount table (13) on guide arm (12), install slip table cylinder (14) on mount table (13), the output of slip table cylinder (14) is connected with bearing board (15), install on bearing board (15) gas storage silo (2), cylinder (16) are installed to the upper end of support frame (11), the output of cylinder (16) is connected in one side of mount table (13) to promote mount table (13) and carry out reciprocating motion along guide arm (12).

3. The battery internal gas sampling device according to claim 1, wherein: draw-in groove (17) are installed to the upper end of chassis (1), just be located draw-in groove (17) one side and install slip table cylinder two (18) on chassis (1), draw-in groove two (19) are installed to the output of slip table cylinder two (18), draw-in groove one (17) with draw-in groove two (19) cooperation centre gripping has electric core (20).

4. The battery internal gas sampling device according to claim 1, wherein: and a bearing bracket (21) for bearing the sealing rubber gasket (5) is arranged at the upper end of the bottom frame (1).

5. A battery internal gas sampling apparatus according to claim 3, wherein: the upper end of the battery cell (20) is provided with an explosion-proof valve (22), and the metal needle (4) collects gas inside the battery cell (20) through puncturing the explosion-proof valve (22) and through the gas storage bin (2).