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Optimization method of lithium ion battery charging

A lithium-ion battery and optimization method technology, applied in the field of lithium-ion batteries, can solve problems such as low efficiency, poor safety, and slow speed

Active Publication Date: 2019-01-08
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the deficiencies of the prior art, the present invention provides a lithium ion battery charging optimization method that solves the problems of relatively slow charging process, low efficiency and poor safety in the existing lithium ion battery charging process

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  • Optimization method of lithium ion battery charging
  • Optimization method of lithium ion battery charging
  • Optimization method of lithium ion battery charging

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Embodiment Construction

[0020] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0021] like figure 1 As shown, a lithium-ion battery charging optimization method includes the following steps: S1 establishes a lithium-ion battery equivalent circuit model, S2 obtains the model state through a state estimation method, S3 establishes a charging strategy multi-system optimization model, and S4 designs a genetic algorithm-based Multi-system optimization method, S5 performs iterative optimization on the multi-system optimization model of the charging strategy through the multi-system optimization method.

[0022] For step S1, an equivalent circuit model of a lithium-ion battery is established:

[0023] like figure 2 As shown, the internal circuit of the lithium-ion battery can be equivalent to a first-order RC circuit. In the figure, OCV is the power supply value when the battery equivalent circuit is open, and V 1 , R ...

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Abstract

The invention discloses a charging optimization method of a lithium ion battery, comprising the following steps: establishing an equivalent circuit model of the lithium ion battery; The model state isobtained by the state estimation method. Establish multi-system optimization model of charging strategy; Design of Multi-system Optimization Method Based on Genetic Algorithm; The multi-system optimization model of charging strategy is iteratively optimized by the multi-system optimization method. The lithium ion battery charging optimization method provided by the invention can improve the rapidity, the efficiency and the safety of the lithium ion battery charging, and can prolong the service life of the lithium ion.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a charging optimization method for lithium ion batteries. Background technique [0002] Lithium-ion batteries are widely used in electric vehicles. However, due to the nonlinear characteristics of the charging process of lithium-ion batteries, especially the slight changes in the state of various parameters of the battery being charged during the entire charging process, it is difficult to use accurate functions to calculate, and the charging process of lithium-ion batteries will inevitably change. It causes the battery to heat up, which reduces the charging efficiency and life of the battery. With the increase of the charging current, the internal polarization of the battery is serious, which leads to the increase of the internal and external temperature of the battery, which further causes the safety problem of the battery. In a sense, performances su...

Claims

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Application Information

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IPC IPC(8): H01M10/44H01M10/0525
CPCH01M10/0525H01M10/44Y02E60/10Y02T10/40
Inventor 马海平潘张鑫卢新祥
Owner SHAOXING UNIVERSITY