Power battery needling triggering thermal runaway system in closed space and gas collecting device

The invention belongs to the technical field of battery safety testing, and particularly relates to a power battery needling triggering thermal runaway system in a closed space and a gas collecting device. The device comprises a closed anti-explosion cavity, a needling device, a battery charging and discharging module, a vacuumizing device, a gas collecting device, a gas analyzing device, an inert gas circulating device and a control system; a needling triggering system in a closed space is built and connected with a special gas collecting device, and accurate data support is provided for gas component analysis of a lithium ion battery needling test. All parts of the device can be connected with a control system, and independent control can be achieved. Test conditions can be selected at will in the test process; according to the invention, the influence of sealed space and mechanical abuse on thermal runaway of the power battery and a gas analysis function are realized; the system is simple and convenient to