Online monitoring method for short-circuit fault in battery energy storage system caused by low-temperature working condition
A battery energy storage system, internal short circuit technology, applied in short circuit testing, measuring electricity, measuring devices and other directions, can solve the problems of lithium dendrite piercing the diaphragm, direct contact between positive and negative electrodes, etc., to ensure safe and reliable operation at low temperature, reduce The effect of solving complexity and reducing the probability of misidentification
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[0084] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0085] The technical solution of the present invention can be divided into four major steps, which are respectively establishing an equivalent model including the internal short circuit of the lithium battery, analyzing the typical process and interference factors of the internal short circuit fault of the lithium battery under low temperature conditions, and determining the characteristic value of the internal short circuit curve caused by the low temperature condition and lithium battery internal short-circuit safety status assessment, where each major step and its minor steps are described in detail as follows:
[0086] Step 1. Establish an equivalent model of a lithium battery internal short circuit
[0087] ① In engineering, the Thevenin model connected by second-order RC circuits is generally used to equivalently simulate the tr...
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