Storage battery charging method and device

Abstract

The invention discloses a storage battery charging method and device. The method includes using preset maximum charging current as initial current to perform charging; sampling charging current in real time; judging the magnitude of current of a current moment and a preset minimum charging current; if the current of the current moment is smaller than the minimum charging current, assigning the minimum charging current to the current of the current moment and continuing to sample; if the current of the current moment is larger than or equal to the minimum charging current, sampling voltage of the current moment, and calculating current of a next moment based on a storage battery model capable of dynamically correcting voltage; judging the magnitude of the current of the next moment and the maximum charging current; if the current of the next moment is larger than the maximum charging current, assigning the maximum charging current to the current of the next moment and continuing to sample; and if the current of the next moment is smaller than or equal to the maximum charging current, updating an energy storage capacitor, electromotive force and internal resistance and continuing to sample. Based on the storage battery model capable of dynamically correcting voltage, the storage battery charging method provided by the invention corrects storage battery parameters in real time, so as to rapidly and accurately charge.

Description

technical field [0001] The present invention relates to the field of storage battery technology, in particular to a storage battery charging method and device. Background technique [0002] There are two main types of existing battery models: the internal resistance model and the resistance-capacitance model, and the model parameters are generally fixed. In fact, these model parameters are all functions of the battery state, which are variables. The model with fixed parameters cannot meet the real-time requirements of the battery management system, and cannot fully characterize the characteristics of the battery, which makes the charging method based on this model also exist. question. [0003] At present, battery charging is based on the Maas law (MAS law), based on the premise of the lowest gas evolution rate and the maximum charging current that the battery can accept. The gas voltage will affect the service life of the battery. Contents of the invention [0004] The...

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Problems solved by technology

[0004] The embodiment of the present invention provides a battery charging method and device to solve the problems in the prior art that the battery charging method affects the service life of the battery, the battery model with fixed parameters cannot meet the real-time requirements of the battery management system, and cannot fully characterize the characteristics of the battery

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