Thermal runaway gas filtration and collection device for soft-pack lithium batteries and operating method

Abstract

The invention discloses a thermal runaway gas filtration and collection device for soft-pack lithium batteries. The device structurally comprises a steel needle driving device, a heating device, a gastransferring device, a gas collection device, a neutralizer filter device, a battery fixing device and a base supporting structure. The device is characterized in that the base supporting structure is fixedly connected with the heating device; the neutralizer filter device, the battery fixing device and the heating device sleeve sequentially and are fixed by a seal ring; the neutralizer filter device, the gas transferring device and the gas collection device are connected through a connection pipe, the steel needle driving device penetrates a neutralization filter system to fixedly connect with a steel needle, and the whole gas filtration and collection device is fixed to the corresponding position of the base supporting structure. The thermal runaway gas filtration and collection devicehas advantages that due to detachability of a case, a battery can be mounted and taken out conveniently; an explosion venting sheet on the inner wall of the case plays a role in protection in batteryexplosion; stability in thermal runaway is realized, gas filtration and adjustment are realized, and easiness in operation and popularization is achieved.

Description

technical field [0001] The invention relates to a thermal runaway gas filtering and collecting device of a soft-pack lithium battery and an operation method thereof, belonging to the field of lithium batteries. Background technique [0002] At present, power batteries are an important part of new energy vehicles, and their safety is a crucial technical parameter. For the safety of the battery, two of the tests are the acupuncture test and the furnace heating test. In order to simulate the situation when the battery is subjected to acupuncture, needles with different diameters are generally used to penetrate the battery or half of the battery at a certain rate, and observe whether the battery is on fire, explodes or leaks, but only in a single Testing under certain conditions cannot guarantee the thermal runaway of the battery, and the existing detection devices cannot achieve the integration of control of battery thermal runaway, battery gas filtration, and gas collection. ...

AI Technical Summary

Problems solved by technology

In order to simulate the situation when the battery is subjected to acupuncture, needles with different diameters are generally used to penetrate the battery or half of the battery at a certain rate, and observe whether the battery is on fire, explodes or leaks, but only in a single Testing under certain conditions cannot guarantee the thermal runaway of the battery, and the existing detection devices cannot achieve the integration of control of battery thermal runaway, battery gas filtration, and gas collection. During gas collection, the change of test gas flow rate cannot be adjusted. Test and test separately. In addition, if the battery explodes, the power of the battery explosion will be very large, and it is easy to injure the test personnel, and the safety of the test personnel cannot be guaranteed. Moreover, the battery has no limit device inside the box and is easy to roll. The test cannot be carried out or the test data is inaccurate, and there are defects such as poor operability and low test efficiency, which are the deficiencies of the existing technology

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