Battery in-situ test system

Abstract

The invention discloses a battery in-situ test system, and relates to the technical field of precise instruments, the battery in-situ test system comprises a charging and discharging module, an environment module and a mechanical loading module, a battery to be tested is electrically connected with the charging and discharging module, and the environment module comprises a temperature control box; the battery to be tested, an optical imaging module, an infrared thermal imaging module and an ultrasonic scanning imaging module are arranged in the temperature control box, and the mechanical loading module is used for loading the battery to be tested. The environment module simulates a test environment, and the optical imaging module observes microscopic deformation or damage of the surface of the battery to be tested; the infrared thermal imaging module identifies the temperature distortion point of the battery to be tested and observes the thermal runaway process of the battery to be tested; and the ultrasonic scanning imaging module monitors the damage, lithium precipitation and state of charge of the battery to be tested. According to the invention, instrument support is provided for revealing a battery performance degradation mechanism and a service life change rule under multiple mechanical-low temperature-electrochemical coupling external fields.

Description

technical field [0001] The invention relates to the technical field of precision instruments, in particular to a battery in-situ testing system. Background technique [0002] With the development of new energy vehicles, batteries with high specific energy and high working voltage, represented by the new generation of lithium-ion technology, have become the mainstream power source of electric vehicles and the research hotspot of future vehicle power batteries. However, the electrochemical cycle performance and safety of lithium-ion batteries in cold environments are still the weak links of this technology. The deposition and intercalation phenomenon caused by cyclic charging and discharging behaviors in low temperature environment accelerates battery aging and the resulting dendrite phenomenon can easily lead to battery short circuit, and even cause property loss and serious accidents. This is an urgent technical problem for lithium-ion batteries to be solved. It also limits...

AI Technical Summary

Problems solved by technology

The battery measuring instruments in the prior art have a single function, and can only perform a qualification test on one performance, and cannot simulate the real service conditions of lithium-ion batteries

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