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

State of charge (SOC)-based power battery pack equalizing charge and discharge control method and system

A power battery pack, balanced charge and discharge technology, applied to battery circuit devices, current collectors, electric vehicles, etc., can solve the problem of not being able to quickly and accurately monitor the SOC change of the battery pack

Inactive Publication Date: 2016-01-06
GUANGXI UNIV
View PDF5 Cites 51 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defect that the SOC of the battery pack cannot be monitored quickly and accurately in the prior art. According to one aspect of the present invention, a method for controlling the balanced charge and discharge of the power battery pack based on SOC is proposed

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
  • State of charge (SOC)-based power battery pack equalizing charge and discharge control method and system
  • State of charge (SOC)-based power battery pack equalizing charge and discharge control method and system
  • State of charge (SOC)-based power battery pack equalizing charge and discharge control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] In Example 1, see Figure 10 As shown, the work flow of the power battery pack equalization charge and discharge control system is as follows:

[0146] Step 201 : the temperature monitoring module, the LTC6804-based terminal voltage detection module, and the current monitoring module acquire the temperature, voltage and current data of the battery in real time, and transmit the data to the SOC estimation module through the SPI serial port.

[0147] Step 202: The SOC module estimates the state of charge of each battery cell according to the trained SOC prediction model, and transmits the calculated SOC data of the single battery to the top-level controller and the corresponding bottom-level controller.

[0148] Step 203: The top-level controller calculates the inconsistency of the battery pack according to the balancing strategy, and analyzes whether the battery pack needs a balancing operation.

[0149] Step 204: When it is detected that the inconsistency of the batter...

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 state of charge (SOC)-based power battery pack equalizing charge and discharge control method and device. The method comprises the steps as follows: charge and discharge data of power batteries are obtained; the charge and discharge data comprise terminal voltage, current and temperature of the power batteries; each power battery comprises a single battery; a mathematic model for calculating the SOC of each power battery is established on the basis of an ELM method; with charge and discharge data as inputs of the mathematic models, the SOC data of the power batteries are determined according to outputs of the mathematic models; a consistency analysis is carried out on power battery packs according to the SOC data of the power batteries; and an on / off state of a switch tube of an equalizer circuit is controlled when the power battery packs are not consistent according to an equalizing control strategy, so that energy transfer of the power batteries is achieved. According to the method, the current state of charge of each battery can be relatively accurately and rapidly predicted; and the equalization accuracy and the equalization power are effectively improved.

Description

technical field [0001] The invention relates to the technical field of battery pack balance control, in particular to a SOC-based power battery pack balance charge and discharge control method and system. Background technique [0002] Due to the advantages of high energy density, low self-discharge rate, and long cycle life, lithium power batteries have been widely used in the field of energy storage. In the process of using the power battery, it is necessary to connect multiple single cells in series to provide energy for the load. At this time, the difference in the performance of the single battery will lead to inconsistency of the battery pack, and the inconsistency of the battery pack will cause the performance of the battery pack to decline, resulting in the attenuation of the available capacity and service life of the battery pack, thereby reducing the battery life of pure electric vehicles. Driving mileage increases the cost of use. Therefore, research on the equal...

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): H02J7/00
Inventor 宋绍剑王志浩林小峰宋春宁廖碧莲
Owner GUANGXI UNIV
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