Lithium ion battery in-situ gas yield detection device and method
A lithium-ion battery and detection device technology, applied in the direction of measuring devices, sampling devices, measuring electricity, etc., can solve problems such as complexity, impossibility of application, difficulty in online monitoring of battery gas production, etc., to achieve simple test methods, universal applicability, The effect of convenient operation
Inactive Publication Date: 2019-10-25
YANCHENG INST OF TECH
View PDF6 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The gas production test of soft-pack batteries is generally measured by measuring the volume change of its shape. The gas production test of round and square hard-shell batteries is relatively difficult and complicated. In-situ online monitoring of gas is more difficult
CN206095503U has introduced a kind of cylindrical lithium ion battery internal gas pressure on-line monitoring device, this invention can only realize the monitoring to battery internal pressure, can't carry out real-time monitoring to gas production composition
CN201620946362 proposes an on-line component analysis device for the internal gas production of a square aluminum shell lithium battery. The gas produced is drawn out from the battery liquid injection port for testing, but for round batteries, this method cannot be applied
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0015] In this embodiment, the device and method of the present invention are used to test the composition and amount of gas produced during the test of the circular battery.
[0016] First, under the protection of the inert atmosphere of the glove box, fix the bottom of the battery upwards, insert the needle 1 into the center of the battery case until the umbrella-shaped gasket 2 completely enters the shell, and pull the needle tube 3 back to make the umbrella-shaped gasket The sheet 2 is unfolded in the battery case; then the sealing gasket 5 is set on the needle tube 3 , and the threaded two-way tube 6 is screwed on the needle tube 3 .
[0017] Then, the bolt 8 with holes is tightened with the two-way pipe 6, and the gas outlet branch pipe 7 is connected to the gas collection bag for collecting gas, or directly connected to a gas analysis instrument such as infrared, chromatography, mass spectrometry, etc. through a sealed pipeline. in the sampling device.
[0018] Finally...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a lithium ion battery in-situ gas yield detection device and method. The device is composed of three parts; the three parts are made of stainless steel material and comprise apuncture needle, a nut type gas-guiding branch, and a gas sampling port; the top of the puncture needle is a triangle and contains a gas-guiding channel therein, the lower surface of the needle is provided with an umbrella-shaped metal gasket; when the detection device is in use, the nut type gas-guiding branch with a main body provided with an internal threaded two-way pipe is screwed with the needle, and a sealing gasket is arranged in the middle to ensure the sealing at a punching part of the battery; and meanwhile, the gas-guiding branch is connected to a gas collecting bag for collectingthe gas. Through the device disclosed by the invention, the gas sample collection can be performed at any time as required, and then the analysis and detection are performed; the device is easy to process, the testing method is simple, convenient to operate, and universal, suitable for each of a round battery and a square battery, and especially suitable for the in-situ detection of the lithium titanate battery gas yield.
Description
technical field [0001] The invention relates to an in-situ gas production detection device and method of a lithium ion battery. Background technique [0002] Lithium-ion batteries will generate gas during the formation of the SEI film during the first charge and discharge process, and the gas-producing components are mostly alkanes, olefins, hydrogen and carbon monoxide. Gas will be generated during storage and cycle testing, which will increase the internal pressure of the battery, degrade battery performance, and even cause safety failures such as loss of control. [0003] In the battery failure analysis, the failure reaction mechanism is usually analyzed in combination with the gas composition and gas production of the battery. The gas production test of soft-pack batteries is generally measured by measuring the volume change of its shape. The gas production test of round and square hard-shell batteries is relatively difficult and complicated. The in-situ online monitor...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/385G01N33/00G01N1/22
CPCG01N1/2226G01N33/0009
Inventor 熊永莲严军陈玉炜樊永胜高豪杰郑尧刚
Owner YANCHENG INST OF TECH