CN209085568U - A kind of test soft-package battery volume devices - Google Patents

Abstract

The utility model relates to a device for testing the volume of a soft pack battery, which comprises a one-way door opening a battery airtight box, a vacuum meter, a vacuum pump, a gas collecting bottle, a rubber stopper, a U-shaped pipe connector and a plurality of air pipes; the one-way door opening the airtight box The body is a rectangular or square box with good sealing performance with a one-way door. There is a circular opening on the top side and the right side of the one-way door closed box. The circular opening on the top side is used for and vacuum. The right side circular opening is connected to the vacuum pump through the air pipe, and the vacuum pump is connected to the gas collecting bottle through the air pipe; a hole plug is installed on the gas collecting bottle, and the hole plug has two holes, respectively Connect the vacuum pump through the connecting air tube and connect the U-tube connector through the connecting air tube. The utility model can quickly and accurately measure the volume of the soft-pack battery to be tested and reduce errors. The expansion rate of the battery can be calculated by the volume difference before and after the same battery experiment, which is fast and convenient, and the error is small.

Description

A device for testing the volume of a soft pack battery

technical field

The utility model relates to the field of batteries, in particular to a device for testing the volume of a soft pack battery.

Background technique

After entering the 21st century, electronic products have fully covered our lives, mobile phones, computers, watches, etc. are too numerous to enumerate; at the same time, polymer soft pack batteries that provide power for electronic products also frequently appear in our lives. As an electrical component used at a high frequency, safety performance is more critical, so in the battery development stage, researchers will strictly control the volume change of the pouch battery during cycling and storage. The researchers will test the volume expansion of the soft pack battery after high temperature storage to prevent the battery from expanding too much and bursting the outer packaging when the user uses it in a high temperature environment, which will eventually lead to safety problems. The traditional test method is to use a caliper to measure the length, width and height of the pouch battery, and finally calculate the battery volume to calculate the expansion rate of the battery. This measurement method will increase human error due to factors such as different operators and inconsistent use, resulting in inaccurate measurement values. At the same time, this measurement method is likely to cause the positive and negative electrodes of the battery to be conductive due to improper operation of the operator during the measurement process, causing the battery to catch fire and burn, which poses a great safety hazard.

Utility model content

The purpose of the utility model is to provide a device for testing the volume of a soft-pack battery, which has the advantages of rapidly and accurately measuring the volume of the soft-pack battery to be tested, reduces human measurement errors, and at the same time does not affect other follow-up research on the soft-pack battery to be tested, And reduce potential safety hazards during testing.

In order to solve the above-mentioned technical problems, the technical scheme provided by the utility model is:

A device for testing the volume of a soft pack battery, comprising a one-way door open battery airtight box, a vacuum gauge, a vacuum pump, a gas collecting bottle, a rubber stopper, a U-shaped pipe connector and several air guide tubes; The rectangular or square box with good sealing performance towards the door opening has a circular opening on the top side and the right side of the one-way door closing box. The circular opening on the upper side is used to connect with the vacuum meter. The side circular opening is connected to the vacuum pump through the air guide, and the vacuum pump is connected to the gas collecting bottle through the air guide; the hole is plugged with two holes, one end is connected to the vacuum pump through the connecting air guide, and the other end is connected to the U-shaped through the connecting air guide Tube connector; the U-shaped tube connector is made of transparent material, with one side thick and one side thin, and a scale on the thinner side; the thicker end of the U-shaped tube is connected to the gas collecting bottle through the air guide , the thinner end of the U-shaped pipe is directly communicated with the atmosphere.

Further, the vacuum gauge adopts a digital display vacuum gauge.

Further, the vacuum pump adopts a negative pressure oil-free vacuum pump.

Further, the inner diameter of the thicker side of the U-shaped pipe connector is in the range of 50mm to 60mm, and the inner diameter of the thinner side is 10mm to 8mm.

Further, the air guide tube is a rubber tube that meets the requirements of vacuuming.

By adopting the utility model, the volume of the battery before and after the experiment can be measured respectively. The expansion rate of the battery.

Beneficial effects:

The utility model is a non-destructive volume testing method, which is simple to operate, easy to grasp, does not generate toxic and harmful gases during the experiment, is safe and environmentally friendly, has small human error during the testing process, does not affect the subsequent research of the soft pack battery to be tested, and reduces the Potential safety hazards during testing.

Description of drawings

Figure 1: Schematic diagram of the structure of the device for measuring the volume of a soft-pack battery of the present invention.

In the picture: 1-One-way door open battery airtight box, 2-Vacuum gauge, 3-Vacuum pump, 4-Gas collection cylinder, 5-U-shaped tube connector, 6-U-shaped tube connector on the thicker side, 7-U The thinner side of the type tube connector, 8-airway.

Detailed ways

The present utility model will be further described below in conjunction with specific embodiments.

A novel measuring device for the volume of a soft pack battery includes a one-way door open battery airtight box, a vacuum gauge, a vacuum pump, a gas collecting bottle, a rubber stopper, a U-shaped pipe connector and several air pipes.

The one-way door closed box is a cuboid or a cube. It is required to have good sealing performance and no air leakage. Zhuo's acrylic material ZDPO1C can meet the requirements. There is a circular opening on the top side and the right side of the closed box, the circular opening on the top side is used for connecting with the vacuum meter, and the opening on the right side is connected with the vacuum pump through an air duct.

The vacuum gauge is used to monitor the air pressure inside the closed box. The vacuum gauge is required to have a large range and high precision. MEACON-MIK-Y190 digital vacuum gauge (0.4 grade accuracy, -100Kpa～200Kpa) can meet the requirements of use.

The vacuum pump is used to pump out the gas in the closed box and transfer it to the gas cylinder, and requires no loss of gas during the pumping process. Fujiwara (Fujiawara) negative pressure oil-free vacuum pump, two-stage microcomputer double-head 1550D vacuum pump can meet the requirements.

The gas collecting bottle is used to collect the gas extracted from the closed box, and it is required to be durable and air-tight.

The rubber stopper is used to seal the mouth of the gas collecting bottle, which requires good elasticity and strong airtightness.

The U-tube connector is used for the reading of the gas extracted from the airtight box, and the inner diameter has a gradient change when it is required to be customized, D1>D2>D3. The inner diameter of the side connected to the gas collecting cylinder is the largest, D1 is 50mm, the atmospheric gradient of the connection is reduced, D2 is 30mm, the inner diameter of the reading section should be the smallest, and D3 is 10mm. In this way, the volume reading obtained by the drainage method can be more accurate. The liquid contained in the U-tube connector is water.

The air-conducting connecting pipe is used to connect all the above devices. It requires good airtightness and meets the requirements of vacuuming, so it is made of rubber.

The operation process is: first connect all devices except the U-tube connector, open the valve of the closed box, when the vacuum gauge reads 0MPa, turn on the vacuum pump to evacuate the closed box, and when the vacuum gauge reads -101KPa , read the upward movement level on the right side of the U-tube connector, that is, the volume V1 in the closed box; then turn off the vacuum pump, open the valve of the closed box, put in the soft pack battery to be tested, and wait for the U-tube connector to return to its position and When the vacuum gauge reads 0MPa, close the valve and turn on the vacuum pump. After the vacuum gauge reads -101KPa, read the liquid level V2 on the right side of the U-tube connector, and then the volume of the soft pack battery to be measured V=V1-V2 can be obtained. After the different types of batteries to be tested are stored at high temperature, the above operations are repeated to obtain the volume V' of the battery after expansion, and the expansion rate of the battery after high temperature storage ρ=(V'-V)/V

Table 1 Volume test results of five types of soft pack batteries

Table 2 The battery volume test results of five types of soft pack batteries after high temperature storage

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model in any form. The technical essence, any simple modifications, equivalent replacements and improvements made to the above embodiments still fall within the protection scope of the technical solutions of the present invention.

Claims (5)

1. a test soft pack battery volume device, it is characterized in that: comprise one-way door open battery airtight box, vacuum meter, vacuum pump, gas cylinder, rubber stopper, U-shaped pipe connector and some air guides; Described one-way door open The closed box is a rectangular or square box with a one-way door with good sealing performance, and the air leakage rate is ≤ 0.1%. The circular opening on the side is used to connect with the vacuum meter, and the circular opening on the right is connected with the vacuum pump through the air pipe, and the vacuum pump is connected with the gas collecting bottle through the air pipe; There are two holes in the hole plug, one end is connected to the vacuum pump through the connecting air tube, and the other end is connected to the U-shaped tube connector through the connecting air tube; the U-shaped tube connector is made of transparent material, and one side is thick and the other side is thin. The thinner side has a scale; the thicker end of the U-shaped pipe is connected to the gas collecting bottle through the air conduit, and the thinner end of the U-shaped pipe is directly communicated with the atmosphere. 2 . The device for testing the volume of a soft pack battery according to claim 1 , wherein the vacuum gauge adopts a digital display vacuum gauge. 3 . 3 . The device for testing the volume of a soft pack battery according to claim 1 , wherein the vacuum pump adopts a negative pressure oil-free vacuum pump. 4 . 4 . The device for testing the volume of a soft pack battery according to claim 1 , wherein the inner diameter of the thicker side of the U-shaped tube connector is in the range of 50mm to 60mm, and the inner diameter of the thinner side is 10mm to 8mm. 5 . 5 . The device for testing the volume of a soft-pack battery according to claim 1 , wherein the air conduit is a rubber tube that meets the requirements of vacuuming. 6 .