CN218067279U

CN218067279U - Lithium ion battery gas collecting device

Info

Publication number: CN218067279U
Application number: CN202221962764.5U
Authority: CN
Inventors: 王化胜; 顾玲铭; 葛科; 郑渊博
Original assignee: Jiangsu Higee Energy Co Ltd
Current assignee: Jiangsu Higee Energy Co Ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-12-16
Anticipated expiration: 2032-07-28

Abstract

The utility model relates to a lithium ion battery gas collection device, include the first connecting piece of being connected with lithium ion battery, the gas receiver is connected through the second connecting piece to first connecting piece, the stock solution bottle is still connected to the second connecting piece, second connecting piece upper end is equipped with the head, the gas receiver is the transparent gas receiver of polytetrafluoroethylene. The utility model discloses a lithium ion battery gas collecting device convenient operation avoids the interference of water, and does not influence gaseous discharge pressure, speed and quantity.

Description

Lithium ion battery gas collecting device

Technical Field

The utility model belongs to the technical field of lithium ion battery, concretely relates to lithium ion battery gas collection device.

Background

The lithium battery has unique advantages and can be widely applied to the field of new energy, but with the development of times, people have higher and higher requirements on high and low temperature performance, rate capability, cycle life, safety and the like of the lithium battery. The research on the gases is helpful for researching the reaction mechanism and failure mode of the manufacturing process and the using process of the lithium battery, and is helpful for improving the performance of the lithium battery. Common gas collection methods include a drainage method, an evacuation method, an air bag collection method and the like, wherein the drainage method can introduce moisture impurities, and the lithium battery is inconvenient to operate because water interferes in the manufacturing and testing processes; the emptying method is not known to adopt an upward or downward exhaust method for collection because the collected gas is colorless and has indefinite components, and the quantity of the collected gas cannot be judged; the bag-in-bag method is a good method for collecting the gas, but the inflation of the air bag requires a certain pressure, which affects the gas discharge and the amount of the gas.

Disclosure of Invention

The utility model aims at providing a lithium ion battery gas collection device, convenient operation avoids the interference of water, and is little to gaseous discharge pressure, speed and quantity influence.

The utility model provides a technical scheme that above-mentioned problem adopted does: the utility model provides a lithium ion battery gas collection device, includes the first connecting piece of being connected with lithium ion battery, the gas receiver is connected through the second connecting piece to first connecting piece, the stock solution bottle is still connected to the second connecting piece, second connecting piece upper end is equipped with the head.

Preferably, the lithium ion battery gas collection device still includes the tube panel of fixed gas receiver, the tube panel still is equipped with the base and the spirit level of adjusting tube panel position, the base is tripod base or four corners base, still is equipped with height-adjusting's knob to the bubble of adjustment spirit level is in the intermediate position, guarantees the balance of tube panel.

Preferably, the first connecting piece is a stainless steel first connecting piece or a polytetrafluoroethylene first connecting piece, and the second connecting piece is a stainless steel connecting piece or a polytetrafluoroethylene second connecting piece, and both the stainless steel connecting piece and the polytetrafluoroethylene second connecting piece are resistant to corrosion of organic electrolyte, hydrogen fluoride and acid and alkali.

More preferably, the first connecting piece is a polytetrafluoroethylene first connecting piece, and the second connecting piece is a stainless steel connecting piece.

Preferably, the first connecting piece is connected with the lithium ion battery in different connection modes according to different battery shells, and if the first connecting piece is a metal shell, the first connecting piece can be connected with the lithium ion battery in a sealing manner through sealant, and if the first connecting piece is an aluminum plastic film, the first connecting piece can be connected with the lithium ion battery in a heat sealing manner.

Preferably, the first connecting piece is connected with the second connecting piece through bolt compression joint.

Preferably, the second connecting piece is connected with a liquid storage bottle through compression joint, and the liquid storage bottle is a stainless steel liquid storage bottle or a polytetrafluoroethylene liquid storage bottle and is resistant to organic electrolyte, hydrogen fluoride and acid-base corrosion.

Preferably, the gas storage pipe is a polytetrafluoroethylene transparent gas storage pipe with volume scales marked on the outer wall, and the inner diameter of the gas storage pipe is 2-12mm.

Preferably, the second connecting piece is connected with an air storage pipe through compression joint, and the air storage pipe is wound and fixed in the pipe coil.

Preferably, the seal head is a rubber plug seal head and is used for injecting oil drops, and the oil drops are used for isolating gas generated by the lithium ion battery from air.

Compared with the existing gas collecting device, the utility model has the advantages that:

the gas collecting device of the lithium ion battery is convenient to operate, avoids the interference of water, and has little influence on the discharge pressure, speed and quantity of gas; wherein, lithium ion battery gas collection device includes the first connecting piece of being connected with lithium ion battery, and the connecting piece is through the second connecting piece connection gas receiver, and the liquid storage bottle is still connected to the second connecting piece, and second connecting piece upper end is equipped with the head, the gas receiver is the transparent gas receiver of polytetrafluoroethylene that the outer wall mark volume scale, so set up for the liquid storage bottle is detached and is accompanied gas spun electrolyte, and the gas that lithium ion battery produced is through first connecting piece, second connecting piece entering gas receiver, and it drips the oil through the head and not only makes the gas of collecting totally keep apart with the outside air to drip, still be convenient for calculate the gas that lithium ion battery produced, and drip and the gas receiver is non-infiltration, the oil drips the frictional force with the gas receiver inner wall just for little, does not basically influence the pressure, speed and the quantity of gaseous emission.

Drawings

Fig. 1 is a schematic structural diagram of a gas collecting device for a lithium ion battery according to an embodiment of the present invention.

Wherein: 1 is lithium ion battery, 2 is first connecting piece, 3 is the second connecting piece, 4 are the gas receiver, 5 are the stock solution bottle, 6 are the head, 7 are the tube dish, 8 are the base, 9 are the spirit level.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1, a schematic structural diagram of a lithium ion battery gas collection device in this embodiment is shown.

The utility model provides a lithium ion battery gas collection device, includes the first connecting piece 2 of being connected with lithium ion battery 1, gas receiver 4 is connected through second connecting piece 3 to first connecting piece 2, first connecting piece 2 is through bolt crimping connection second connecting piece 3, gas receiver 4 is connected through the crimping to second connecting piece 3, liquid storage bottle 5 is still connected to second connecting

piece

3, 3 upper ends of second connecting piece are equipped with head 6, second connecting piece 3 is arranged in introducing gas in first connecting

piece

2 and 4, and separates the electrolyte along with gas ejection, and the electrolyte along with gas ejection is because of the action of gravity deposit in liquid storage bottle 5, liquid storage bottle 5 is the crimping with being connected of second connecting piece 3 to the taking out of the electrolyte of deposit in liquid storage bottle 5.

First connecting piece 2 is the polytetrafluoroethylene connecting piece, second connecting piece 3 is the stainless steel connecting piece, stock solution bottle 5 is the polytetrafluoroethylene stock solution bottle, first connecting piece 2, second connecting piece 3, stock solution bottle 5 all are able to bear or endure organic electrolyte, hydrogen fluoride and acid-base corrosion.

The seal head 6 is a rubber plug seal head and is used for injecting oil drops, and the oil drops are used for isolating gas generated by the lithium ion battery from air.

The gas storage tube 4 is used for storing gas generated by the lithium ion battery and is a polytetrafluoroethylene transparent tube, the inner diameter of the gas storage tube 4 is 10mm, and volume scales are marked on the outer wall of the gas storage tube 4.

Lithium ion battery gas collection device is still including the pipe dish 7 of the fixed gas receiver of winding 4, pipe dish 7 still is equipped with base 8 and spirit level 9, base 8 is the tripod base, and it is equipped with height-adjusting's knob to the bubble of adjustment spirit level 9 is in the intermediate position, guarantees the balance of pipe dish 7.

The operation of the present embodiment is described in detail below with reference to the accompanying drawings:

firstly, connecting a first connecting piece 2 with a lithium ion battery 1, and then adjusting a leveling knob of a base 8 of a tube plate 7 to enable a bubble of a level gauge 9 to be in the middle position, so as to ensure the balance of the tube plate 7; then, injecting silicon oil from the rubber plug seal head 6 by using an injector, wherein the length of the silicon oil drops is more than or equal to 1mm and is marked as first oil drops; starting a charging and discharging cabinet to charge and discharge the lithium ion battery 1, generating gas inside along with the charging and discharging of the lithium ion battery 1, wherein the gas pressure inside the battery is higher and higher along with the gathering of the generated gas, the gas inside the lithium ion battery 1 is diffused through the inner walls of the first connecting piece 2 and the second connecting piece 3 to push first oil drops to move forwards along the gas storage pipe 4, when the gas inside the battery is diffused, part of electrolyte gas is sprayed out, and the sprayed electrolyte is converged in the liquid storage bottle 5 due to the principle of gravity; until the charging and discharging are terminated in stages, pumping silicon oil from the rubber plug end socket 6 again, wherein the length of the silicon oil drops is more than or equal to 1mm and is recorded as second oil drops, pumping air from the rubber plug end socket 6 by using an injector, pushing the second oil drops to move into the gas storage pipe 4 by more than 15mm, plugging the orifice of the gas storage pipe 4 by using a rubber plug, and taking out the gas storage pipe 4 from the pipe coil 7; and finally, calculating and analyzing the volume of the collected gas, wherein the method specifically comprises the following steps:

volume calculation of collected gas: the gas storage pipe 4 is placed on a horizontal desktop, the gas storage pipe is straightened, and the volume of gas generated in the charging process of the lithium ion battery 1 is the reading difference from the first oil drop to the second oil drop.

Component analysis of the collected gas: the syringe needle is inserted into the rubber plug of the gas storage tube 4, the gas between the rubber plug and the second oil drop is extracted firstly until the silicone oil of the second oil drop is extracted, at the moment, the gas between the first oil drop and the rubber plug is the gas generated inside the lithium ion battery 1, and the analysis can be carried out by adopting the syringe extraction.

In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A lithium ion battery gas collection device is characterized in that: include first connecting piece (2) of being connected with lithium ion battery (1), gas receiver (4) is connected through second connecting piece (3) in first connecting piece (2), stock solution bottle (5) are still connected in second connecting piece (3), second connecting piece (3) upper end is equipped with head (6), gas receiver (4) are the transparent gas receiver of polytetrafluoroethylene.

2. The lithium ion battery gas collection device of claim 1, wherein: the lithium ion battery gas collection device further comprises a pipe disc (7) for fixing the gas storage pipe (4), and the pipe disc (7) is further provided with a base (8) and a level gauge (9).

3. The lithium ion battery gas collection device of claim 2, wherein: the base (8) is a three-leg base or a four-corner base.

4. The lithium ion battery gas collection device of claim 1, wherein: the first connecting piece (2) is a stainless steel first connecting piece or a polytetrafluoroethylene first connecting piece, and the second connecting piece (3) is a stainless steel connecting piece or a polytetrafluoroethylene second connecting piece.

5. The lithium ion battery gas collection device of claim 4, wherein: the first connecting piece (2) is a polytetrafluoroethylene first connecting piece, and the second connecting piece (3) is a stainless steel connecting piece.

6. The lithium ion battery gas collection device of claim 1, wherein: the first connecting piece (2) is connected with the second connecting piece (3) through bolt crimping.

7. The lithium ion battery gas collection device of claim 1, wherein: the second connecting piece (3) is connected with a liquid storage bottle (5) through compression joint, and the liquid storage bottle (5) is a stainless steel liquid storage bottle or a polytetrafluoroethylene liquid storage bottle.

8. The lithium ion battery gas collection device of claim 1, wherein: the gas storage pipe (4) is a polytetrafluoroethylene transparent gas storage pipe with volume scales marked on the outer wall, and the inner diameter of the gas storage pipe (4) is 2-12mm.

9. The lithium ion battery gas collection device of claim 1, wherein: the second connecting piece (3) is connected with the gas storage pipe (4) through compression joint.

10. The lithium ion battery gas collection device of claim 1, wherein: the seal head (6) is a rubber plug seal head.