Method and device for predicting charging and discharging performance of battery cell, storage medium and electronic equipment

Abstract

The invention relates to a method and device for predicting charging and discharging performance of a battery cell, a storage medium and electronic equipment. The method comprises the steps: in the process of predicting the target performance of a to-be-produced target battery cell, for multiple different preset environment temperatures, obtaining the voltage actual measurement data and battery cell temperatures, measured at multiple moments at the preset environment temperatures, of the small soft package battery cell, wherein the target performance comprises the charging performance or the discharging performance; calibrating model parameters of a preset small soft package battery cell model corresponding to the preset environment temperature according to the voltage measured data and the battery cell temperature to obtain a target small soft package model after parameter calibration; obtaining battery cell design parameters corresponding to the target battery cell; establishing a target battery cell model corresponding to the target battery cell according to the battery cell design parameters and the target small soft package model; and predicting charging and discharging performance parameters of the target cell during constant-current rate charging or discharging through the target cell model.

Description

technical field [0001] The present disclosure relates to the field of battery performance detection, and in particular, to a method, device, storage medium and electronic equipment for predicting the charging and discharging performance of a battery. Background technique [0002] With the urgent demand for new energy vehicles in the market, power battery companies must also speed up the battery cell iteration speed and shorten the R&D cycle. The battery cells are divided into different stages from design to mass production. In related technologies, a certain number of batteries are selected for each stage. For example, first design a small soft-pack battery, and then conduct a performance test based on the small soft-pack battery. After the performance of the small soft-pack battery meets the requirements, the small soft-pack battery that meets the performance requirements can cores to produce large square batteries, and then to test whether the produced large square batteri...

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Problems solved by technology

[0002] With the urgent demand for new energy vehicles in the market, power battery companies must also speed up the battery cell iteration speed and shorten the R&D cycle. The battery cells are divided into different stages from design to mass production. In related technologies, a certain number of batteries are selected for each stage. For example, first design a small soft-pack battery, and then conduct a performance test based on the small soft-pack battery. After the performance of the small soft-pack battery meets the requirements, the small soft-pack battery that meets the performance requirements can cores to produce large square batteries, and then to test whether the produced large square batteries meet the performance requirements of charging and discharging. However, a certain number of parallel samples are selected for testing at each stage, which will not only increase product costs, manpower and material resources The consumption will also reduce the research and development efficiency of the battery cell, which will affect the iteration speed of the battery cell

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