Power map switching method and device of power battery and electronic equipment

Abstract

The invention discloses a power map switching method and device of a power battery and electronic equipment, which are applied to a battery management system. The method comprises the steps of: counting battery using power within current using duration, and acquiring loss speed increase corresponding to the battery using power based on a first mapping relation, wherein the first mapping relation is determined by a ratio of a switching threshold value of each power map to the longest service time, and the loss acceleration is used for representing the loss rate of the pulse discharging or pulse charging capability of the battery; and calculating an integral value of the loss acceleration in the current using duration, and when the integral value is equal to a target switching threshold value, switching the current power map to the power map corresponding to the target switching threshold value. According to the power map switching method and device provided by the invention, the power map switching method is established by taking the switching threshold value representing the charge and discharge capacity loss state of the battery as a reference, and the accuracy of the power map switching time is improved.

Description

technical field [0001] The invention relates to the field of new energy batteries, in particular to a power map switching method, device and electronic equipment of a power battery. Background technique [0002] With the development of various technologies of power batteries, the application of electric vehicles has become more and more extensive, and the improvement of power and driving range of electric vehicles has become more and more obvious, so that the peak discharge power and peak feedback of the power battery of the vehicle Power has a higher requirement. The power map is a power table recorded under different temperature conditions and different battery state of charge (State of Charge, SOC) conditions. Each power value in the table represents two layers of meaning, and a specified temperature and SOC condition is used as the use condition For example, on the one hand, under the current conditions, the corresponding power value can last for the longest usage time;...

AI Technical Summary

Problems solved by technology

However, in the actual use process, the actual power of the battery is constantly changing below the power value limited in the power map, and is not used constantly according to the limited value marked in the power map. Therefore, the longest use time of each power map is used as the The switching time of the power map cannot accurately match the maximum power actually supported by the power battery in each time period, which makes it difficult to grasp the switching time of switching to a power map with a smaller power value

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