Method for controlling balance of power lithium ion battery

A lithium-ion battery and control method technology, which is applied in the field of battery equalization control, can solve the problems of inability to protect the service life of batteries, outdated equalization means, and low equalization efficiency, so as to improve battery consistency, increase cruising range, The effect of prolonging the service life

Active Publication Date: 2012-02-22
CHERY AUTOMOBILE CO LTD
View PDF4 Cites 47 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the power battery equalization method is backward, and most of them adopt passive equalization method, that is, the battery equalization control is performed after the battery fails, which cannot protect the battery and prolong the service life of the battery, making its equalization efficiency low and the effect not obvious

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for controlling balance of power lithium ion battery
  • Method for controlling balance of power lithium ion battery
  • Method for controlling balance of power lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] Specific as figure 1 shown.

[0035] (1) Online determination of battery cells that need to be balanced under charging or discharging state

[0036] Specifically include:

[0037] Pre-measure the capacity index SOC of each battery cell i And the balanced capacity index SOC of the entire battery pack A ;

[0038] Get the capacity index SOC of each battery cell i with balanced capacity index SOC A The capacity deviation value ΔSOC between i , where ΔSOC i = SOC i -SOC A ;

[0039] According to the capacity deviation value ΔSOC i and balanced capacity index SOC A Identify the battery cells that need to be balanced.

[0040] Determine the battery cells that need to be balanced according to the capacity deviation value ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for controlling the balance of a power lithium ion battery, belonging to the technical field of battery balance control. The method comprises the following steps of: determining battery monomers needing to be balanced in the charging or discharging state on line, calculating balance time needed by the battery monomers needing to be balanced for reaching a target balance capacity, and calculating a start time point when the battery monomers are balanced; and triggering a balance executing mechanism to execute balancing at the initial time point. In the invention, an online active balance way is adopted, and energy is supplemented when the energy level is in low and is released when the energy level is high, so that the energy of each battery monomer tends to be consistent, the discharging capability and cruising distance of a battery pack are increased, the problem caused by battery consistence is solved, and the balance efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of battery equalization control, in particular to a power lithium-ion battery equalization control method, which is mainly applied to active equalization systems of power batteries such as pure electric vehicles, hybrid electric vehicles, and plug-in hybrid electric vehicles. Background technique [0002] Energy shortage and environmental protection calls are getting higher and higher, and new energy vehicles have become one of the most important development directions of green vehicles. The safety and stability of power batteries have also been greatly improved, and they play a pivotal role in the field of new energy vehicles today. However, the problem that restricts the development of electric vehicles is still the energy storage technology and application technology of power batteries. Lithium-ion batteries are one of the most commonly used power batteries for electric vehicles today. Its advantages are...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/44
CPCY02E60/10
Inventor 许莉
Owner CHERY AUTOMOBILE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap