System for testing thermal performance of vehicle power battery

Abstract

A system for testing thermal performance of a vehicle power battery belongs to the field of electric vehicle batteries. The system includes a high-temperature explosion-proof box; a pressure sensor, a temperature sensor, a heating and cooling device, a battery module and a circulating fan are arranged in the high temperature explosion-proof box; the circulating fan is connected with a circulating motor; the high temperature explosion-proof box is provided with an exhaust hole; the exhaust hole, a ball valve, a sampling port, a cut-off valve and a gas chromatograph are connected in sequence; the ball valve is connected to a gas collecting bag through an air exhaust pipe; the pressure sensor and the temperature sensor are connected to the computer through a data collector; a charge-discharge machine is connected to the battery module through a socket; the high temperature explosion-proof box is provided with an observation window; and the observation window is connected to a camera through an endoscope. The system can perform thermal property test of the battery, battery discharge analysis and thermal runaway test of the battery. The system has the advantages of simple structure and low cost, can carry out test on multiple functions of the lithium ion battery, so as to realize design optimization on the structure of the battery pack; and the system has broad market prospects.

Description

Technical field [0001] The invention provides a thermal performance test system for a vehicle power battery, which belongs to the field of electric vehicle batteries. Background technique [0002] With the development of modern technology and the increasingly prominent energy and environmental issues, the application of electric vehicles has become more and more extensive, and the performance requirements for power batteries have become higher and higher. Lithium-ion batteries have become people’s first choice due to their high voltage, high specific energy, long cycle life, and low environmental pollution. However, fire and explosion accidents caused by thermal runaway of lithium-ion batteries have been reported frequently, and safety issues have become obstacles. One of the main reasons for the mass production and application of lithium-ion batteries. Therefore, many scholars at home and abroad have carried out researches on the thermal characteristics and thermal runaway of l...

AI Technical Summary

Problems solved by technology

At present, the experimental devices for the research on the thermal characteristics of batteries mainly include vacuum tanks, incubators, etc. When the heat dissipation rate of the battery in the working process is lower than the heat generation rate, thermal runaway will occur

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