Power battery pack allowable discharging power estimation method

A technology that allows discharge power and power battery packs. It is applied in the direction of secondary battery charging/discharging, secondary battery repair/maintenance, and electrical measurement. It can solve the problems of battery over-discharge, battery damage, and failure to consider consistency. The effect of reducing the possibility of over-discharge and accurately predicting the discharge power

Active Publication Date: 2013-01-09
HUIZHOU EPOWER ELECTRONICS
View PDF6 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the method for estimating the allowable discharge power of the battery pack is relatively simple, mainly based on the temperature T and SOC of the battery pack for power estimation
This method does not consider factors such as the voltage, interna

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] In order to facilitate those skilled in the art to understand, the present invention will be described in further detail below in conjunction with embodiment:

[0015] During the driving of the electric vehicle, the battery management system and the vehicle control unit collect the parameters of the battery pack in real time, and use the method designed in this embodiment to estimate the allowable discharge power of the power battery pack. Specifically, the method includes the following steps:

[0016] First, pre-calculate the allowable discharge power Pset value under each temperature T and corresponding SOC value of the battery pack, form a discharge power comparison table MAP, and pre-store the data in the battery management system database; the discharge power comparison Table MAP is shown in the following table:

[0017] SOC / T -35℃ -30℃ -20℃ -10℃ 0℃ 10℃ 20℃ 40℃ 55℃ 5% 0 0 0 0 0 0 0 0 0 10% 0 0 20 40 60 90 120 120 120 ...

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 relates to a power battery pack allowable discharging power estimation method, which is characterized in that an allowable discharging power value Pset under each temperature T and corresponding system-on-chip (SOC) value when a battery pack is in work is previously measured, a discharging power reference table MAP is formed, and the data is prestored in a battery management system database; and then the allowable discharging power value is obtained by adopting different calculation methods according to the SOC values. By comprehensively considering factors such as internal resistance of the battery pack, the lowest voltage, consistency of the battery pack and the like and segmenting the SOC, the estimation of the battery pack allowable discharging power is more accurate. Moreover, a battery management system can better control the discharging of the battery pack according to the acquired allowable discharging power, the over discharge possibility is reduced, and the battery pack is better protected.

Description

technical field [0001] The present invention relates to an improvement of a method for controlling a battery pack. Background technique [0002] At present, the method for estimating the allowable discharge power of the battery pack is relatively simple, mainly based on the temperature T and SOC of the battery pack for power estimation. This method does not consider factors such as the voltage, internal resistance, and consistency of each single battery in the battery pack. When there is an error in the SOC, the internal resistance of the battery increases, and the inconsistency of the battery increases, some batteries may be over-discharged and damaged. Battery. Contents of the invention [0003] In view of this, the technical problem to be solved by the present invention is to provide a comprehensive consideration of the battery pack, temperature, SOC value, voltage, internal resistance, and the consistency factors of each battery cell, and accurately estimate the allow...

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): G01R31/36H01M10/44
CPCY02E60/12Y02E60/10
Inventor 刘飞文锋阮旭松张金灵
Owner HUIZHOU EPOWER ELECTRONICS
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