Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for compound equalization control of power battery pack

A power battery pack and balanced control technology, which is applied in electric traction, electric vehicles, vehicle components, etc., can solve problems such as voltage criterion error and power battery pack working current instability

Active Publication Date: 2018-12-18
SINOCAT ENVIRONMENTAL TECH
View PDF8 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But on the one hand, because the working current of the power battery pack is not constant, that is, there are errors in the voltage criterion; on the other hand, due to the existence of cumulative errors in SOC estimation, this method also has certain defects.

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
  • A method for compound equalization control of power battery pack
  • A method for compound equalization control of power battery pack
  • A method for compound equalization control of power battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0061] The technical scheme of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0062] figure 1 A schematic structural diagram of a system used in the composite balance control of a power battery pack provided for an embodiment of the present invention, mainly including a power battery pack, a battery status monitoring module, an MCU main control module and a battery balancing circuit module, wherein the battery status monitoring module It includes a monomer voltage acquisition circuit, a temperature acquisition circuit and a current acquisition circuit to monitor in real time the temperature and current value at both ends of the power battery pack, as well as the monomer voltage value at both ends of each monomer.

[0063] specific, figure 2 It is a schematic diagram of the electrical connection of the power battery pack in the embodiment of the present invention. The lithium iron phosphate battery has ...

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 provides a composite balancing control method of a power battery pack, belonging to the technical field of battery management. By collecting the voltage of each cell of the power batterypack and calculating the voltage difference, the SOC of each cell is estimated and the SOC difference is calculated by the ampere-hour integration method. Then the voltage difference and SOC difference are considered in a weighted manner, and the weight coefficients of voltage difference and SOC difference are set in stages according to the operation state of the power battery pack, so as to achieve the optimal judgment of the balance degree of the power battery pack. The method improves the accuracy of judging the battery pack inconsistency, improves the equalization efficiency, and improvesthe equalization effect.

Description

technical field [0001] The invention belongs to the technical field of battery management, and in particular relates to a compound balance control method for a power battery pack. Background technique [0002] At present, the power system of pure electric vehicles is mainly powered by lithium-ion power battery packs. The lithium-ion power battery pack is composed of a large number of single lithium-ion batteries connected in series and parallel, connected in series to obtain a higher output voltage, and connected in parallel to obtain a larger capacity. Lithium-ion battery cells have many advantages such as high energy density, long cycle life, mature production technology, and relatively low cost. However, when a large number of battery cells are used in groups, there are usually differences between each battery cell. These differences will cause inconsistencies in the performance of each battery cell. Overcharging and overdischarging of single cells occurs, which leads t...

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
IPC IPC(8): B60L11/18
CPCY02T10/70
Inventor 徐自强王晓辉吴孟强冯也彧黄继瑶张淑萍丁晨光林金明
Owner SINOCAT ENVIRONMENTAL TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com