CN215678262U

CN215678262U - Semi-automatic gas sample introduction device

Info

Publication number: CN215678262U
Application number: CN202120756529.1U
Authority: CN
Inventors: 王修芳; 胡淑婉; 张峥; 陆大班; 鲁扬
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Anhui Guoxuan New Energy Vehicle Technology Co ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2022-01-28
Anticipated expiration: 2031-04-13

Abstract

The utility model provides a gas semi-automatic sample introduction device, which comprises a syringe needle, a vacuum pump, a quantitative ring, an air outlet pipe, a carrier gas storage device and a detector, wherein the syringe needle is provided with a vacuum pump; the syringe needle, the vacuum pump, the carrier gas storage device, the detector and the air outlet pipe are all communicated with the quantitative ring. The utility model realizes semi-automatic sample introduction and saves part of human resources; the device is suitable for a semi-automatic sample introduction device which is small in gas quantity and avoids gas samples from being polluted by air, and the device has important significance for gas analysis and failure research of lithium batteries.

Description

Semi-automatic gas sample introduction device

Technical Field

The utility model belongs to the technical field of lithium battery gas testing, and particularly relates to a gas semi-automatic sampling device.

Background

Lithium ion batteries have been widely used in portable devices because of their advantages of high output voltage, no memory effect, long service life, environmental protection, etc. With the vigorous support and popularization of new energy automobiles in various countries in the world, lithium ion batteries are rapidly developed in the field of electric automobiles in recent years. During the storage and charge-discharge processes of lithium ion batteries, gases are easily generated inside the batteries due to the existence of various chemical reactions. The generation of these gases seriously affects the cycle performance and capacity of the battery and also poses safety problems.

At present, a gas chromatograph is generally adopted to analyze the content of components in gas, and a gas sample injection injector adopts two sample injection modes of manual sample injection or six-way valve automatic sample injection. The injector sample injection method is simple and flexible, but has the defects of poor sealing performance, poor sample injection stability, large workload of operators, higher operation proficiency of the operators and the like. No matter in the lithium battery gas collection process or the gas analysis sampling process, the air component can be mixed in the injector in the manual sampling process, so that the accuracy of the quantitative result of the gas production component of the lithium battery is influenced. The commercialized six-way valve sample injection mode adopts the flow mode to inject the sample, though convenient operation, reproducibility are good, but gas consumption is big. The lithium battery has less gas production, so the six-way valve sample injection system is not suitable.

SUMMERY OF THE UTILITY MODEL

Based on the technical problems in the background art, the utility model provides a gas semi-automatic sampling device.

The utility model provides a gas semi-automatic sample introduction device, which comprises an injector needle, a vacuum pump, a quantitative ring, an air outlet pipe, a carrier gas storage device and a detector, wherein the injector needle is provided with a vacuum pump; the syringe needle, the vacuum pump, the carrier gas storage device, the detector and the air outlet pipe are all communicated with the quantitative ring.

Preferably, the device further comprises a six-way valve, a first vent pipe, a second vent pipe, a third vent pipe, a fourth vent pipe and a fifth vent pipe; six valve ports of the six-way valve are sequentially communicated with a first vent pipe, a second vent pipe, a third vent pipe, a fourth vent pipe, an air outlet pipe and a fifth vent pipe; the inlet end and the outlet end of the quantitative ring are respectively communicated with the first vent pipe and the fourth vent pipe, the carrier gas storage device is communicated with the second vent pipe, the detector is communicated with the third vent pipe, and the syringe needle and the vacuum pump are communicated with the fifth vent pipe

Preferably, the device further comprises a first three-way valve, a sixth vent pipe and a seventh vent pipe; the tee joint of the first three-way valve is respectively communicated with a fifth vent pipe, a sixth vent pipe and a seventh vent pipe, and the sixth vent pipe and the seventh vent pipe are respectively communicated with the syringe needle and the vacuum pump.

Preferably, still include second three-way valve, eighth breather pipe and pressure sensor, the tee bend of second three-way valve communicates with seventh breather pipe, eighth breather pipe, pressure sensor respectively, and the second three-way valve passes through eighth breather pipe and vacuum pump intercommunication.

Preferably, the sixth breather pipe, the eighth breather pipe and the air outlet pipe are respectively provided with a first electromagnetic valve, a second electromagnetic valve and a third electromagnetic valve.

According to the semi-automatic gas sample introduction device, the pressure sensor on the second three-way valve can measure the pressure in the second three-way valve, so that the consistency of the gas sample introduction pressure is ensured, and the accuracy of a test result is improved; the electromagnetic valve can avoid the interference of air gas, improve the accuracy of the gas component test of the lithium battery and improve the utilization rate of a sample; by adjusting the opening and closing of the electromagnetic valve and the rotation of the six-way valve, semi-automatic sample injection is realized, and partial human resources are saved; the device is suitable for a semi-automatic sample introduction device which is small in gas quantity and avoids gas samples from being polluted by air, and the device has important significance for gas analysis and failure research of lithium batteries.

Drawings

FIG. 1 is a schematic view of a flow path for evacuating a gas pipeline of a semi-automatic gas sample injection device according to the present invention;

FIG. 2 is a schematic view of a sample injection flow path of a gas entering a six-way valve of a gas semi-automatic sample injection device according to the present invention;

FIG. 3 is a schematic view of a flow path of gas entering a gas chromatography detector of a semi-automatic gas sample injection device according to the present invention.

Detailed Description

Referring to fig. 1-3, the utility model provides a gas semi-automatic sample introduction device, which comprises a syringe needle 1 for gas collection, a vacuum pump 2, a quantitative ring 3, an air outlet pipe 4, a carrier gas storage device 5, a detector 6, a six-way valve 7, a first vent pipe, a second vent pipe, a third vent pipe, a fourth vent pipe and a fifth vent pipe;

six valve ports of the six-way valve 7 are communicated with a first vent pipe, a second vent pipe, a third vent pipe, a fourth vent pipe, an air outlet pipe 4 and a fifth vent pipe in sequence; the air inlet end and the air outlet end of the quantitative ring 3 are respectively communicated with the first vent pipe and the fourth vent pipe, the carrier gas storage device 5 is communicated with the second vent pipe, the detector 6 is communicated with the third vent pipe, and the syringe needle 1 and the vacuum pump 2 are communicated with the fifth vent pipe.

In a specific embodiment, the system further comprises a first three-way valve 8, a second three-way valve 9, a pressure sensor 13, a sixth vent pipe, a seventh vent pipe and an eighth vent pipe. The tee joint of the first three-way valve 8 is communicated with a fifth vent pipe, a sixth vent pipe and a seventh vent pipe respectively, the tee joint of the second three-way valve 9 is communicated with the seventh vent pipe, an eighth vent pipe and a pressure sensor 13 respectively, the sixth vent pipe is communicated with the syringe needle 1, and the eighth vent pipe is communicated with the vacuum pump 2. The sixth vent pipe, the eighth vent pipe and the air outlet pipe 4 are respectively provided with a first electromagnetic valve 10, a second electromagnetic valve 11 and a third electromagnetic valve 12.

The specific working principle of the utility model is as follows:

firstly, vacuumizing: as shown in fig. 1, the six-way valve 7 is rotated to communicate the second vent pipe with the third vent pipe, the first vent pipe with the fifth vent pipe, and the fourth vent pipe with the outlet pipe, so that the carrier gas storage device 5 is communicated with the detector 6, and the quantitative ring 3 is communicated with the vacuum pump 2; closing the first electromagnetic valve 10 and the third electromagnetic valve 12, opening the second electromagnetic valve 11, starting the vacuum pump 2, and vacuumizing the quantitative ring; when the pressure value output by the pressure sensor 13 is stable, the vacuumizing is finished, and the second electromagnetic valve 11 and the vacuum pump 2 are closed;

secondly, air intake sample: as shown in fig. 2, the syringe needle 1 is pricked into the edge of the dead battery within 1cm or the port of the gas collection bag, the first electromagnetic valve 10 and the third electromagnetic valve 12 are opened, the gas in the battery or the gas collection bag can naturally enter the quantitative ring 3 along each path of vent pipe, after the pressure is stabilized, the gas sampling is finished, and the first electromagnetic valve 10 and the third electromagnetic valve 12 are closed;

and finally, detecting: as shown in fig. 3, the six-way valve 7 is rotated to communicate the first vent pipe with the second vent pipe, the third vent pipe with the fourth vent pipe, and the air outlet pipe with the fifth vent pipe; so that the gas inlet end and the gas outlet end of the quantitative ring 3 are respectively communicated with the carrier gas storage device 5 and the detector 6; the carrier gas storage device 5 releases the carrier gas to convey the gas sample in the quantitative ring 3 to the detector 6 for the next testing analysis; after the detection is finished, the six-way valve 7 is restored to the state before the sample introduction, and the first electromagnetic valve 10, the second electromagnetic valve 11 and the third electromagnetic valve 12 are all closed.

According to the semi-automatic gas sample introduction device, the pressure sensor 13 can measure the pressure in the second three-way valve, the pressure of gas sample introduction is ensured to be consistent, and the accuracy of a test result is improved; the first electromagnetic valve 10, the second electromagnetic valve 11 and the third electromagnetic valve 12 can guide the sample into the quantitative ring, so that the interference of air gas can be avoided, the accuracy of the gas component test of the lithium battery is improved, and the utilization rate of the sample is improved; by adjusting the opening and closing of the first electromagnetic valve 10, the second electromagnetic valve 11 and the third electromagnetic valve 12 and the rotation of the six-way valve 7 on the sample analyzer, semi-automatic sample introduction is realized, and partial human resources are saved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A gas semi-automatic sample introduction device is characterized by comprising a syringe needle (1), a vacuum pump (2), a quantitative ring (3), an air outlet pipe (4), a carrier gas storage device (5) and a detector (6); the syringe needle (1), the vacuum pump (2), the carrier gas storage device (5), the detector (6) and the air outlet pipe (4) are communicated with the quantitative ring (3);

the gas semi-automatic sample introduction device further comprises a six-way valve (7), a first vent pipe, a second vent pipe, a third vent pipe, a fourth vent pipe and a fifth vent pipe; six valve ports of the six-way valve (7) are communicated with a first vent pipe, a second vent pipe, a third vent pipe, a fourth vent pipe, an air outlet pipe (4) and a fifth vent pipe in sequence; the gas inlet end and the gas outlet end of the quantitative ring (3) are respectively communicated with a first vent pipe and a fourth vent pipe, the carrier gas storage device (5) is communicated with the second vent pipe, the detector (6) is communicated with the third vent pipe, and the syringe needle (1) and the vacuum pump (2) are communicated with a fifth vent pipe;

the gas semi-automatic sample introduction device further comprises a first three-way valve (8), a sixth vent pipe and a seventh vent pipe; a tee joint of the first three-way valve (8) is respectively communicated with a fifth vent pipe, a sixth vent pipe and a seventh vent pipe, and the sixth vent pipe and the seventh vent pipe are respectively communicated with the syringe needle (1) and the vacuum pump (2);

the gas semi-automatic sample introduction device further comprises a second three-way valve (9), an eighth vent pipe and a pressure sensor (13), wherein a tee joint of the second three-way valve (9) is respectively communicated with the seventh vent pipe, the eighth vent pipe and the pressure sensor, and the second three-way valve (9) is communicated with the vacuum pump (2) through the eighth vent pipe;

a gas semi-automatic sampling device, install first solenoid valve (10), second solenoid valve (11), third solenoid valve (12) on sixth breather pipe, eighth breather pipe, outlet duct (4) respectively.