Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and system for estimating state of health of battery pack

A technology of health status and battery pack, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of spending a lot of time and inconvenience for users

Active Publication Date: 2017-07-21
AUTOMOTIVE RES & TESTING CENT
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, it is known that the methods used in the research on the battery management system can be roughly divided into the open circuit voltage method, the Coulomb electric quantity integration method and the load voltage method, etc., but the above methods need to spend a lot of time to construct the measurement database of the rechargeable battery. Estimates the state of charge and state of health of rechargeable batteries
In addition, the open circuit voltage method can only be measured when the rechargeable battery stops charging and discharging, which is extremely inconvenient for users

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 and system for estimating state of health of battery pack
  • Method and system for estimating state of health of battery pack
  • Method and system for estimating state of health of battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Please refer to figure 1 and figure 2 ,in figure 1 is a schematic block diagram illustrating a system for estimating the state of health of a battery pack according to an embodiment of the present invention, figure 2 is drawn according to figure 1 The block diagram of the computing module. The system for estimating the state of health of the battery pack 100 includes a battery pack 110 , a voltage detection circuit 120 , a current detection circuit 130 , an operation module 140 , a memory module 150 , a display module 160 and a load 170 .

[0018] The battery pack 110 has a plurality of battery cores 111 , and the present invention is described with a lithium-iron battery pack as an example, but is not limited thereto.

[0019] The voltage detection circuit 120 is electrically connected to the battery pack 110 , and the voltage detection circuit 120 repeatedly measures a plurality of loop voltages V of each battery cell 111 with different discharge capacities AH u...

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 battery pack health state estimation method and system. According to the battery pack health state estimation method, a battery cell discrete quantitative calculation method is used for calculating the health state of a battery pack, wherein the loop voltage of the battery pack is used for calculation to obtain the voltage standard difference, in addition, the discharging electric quantity corresponding to the voltage standard difference is used for comparing the rated discharging electric quantity of the battery pack, and the health state of the battery pack can be estimated.

Description

technical field [0001] The present invention relates to a method and system for estimating the state of health of a battery pack, and in particular to a method and system for estimating the state of health of a battery pack without setting up a database. Background technique [0002] With the rising awareness of environmental protection and energy saving, related technologies of special power vehicles are developing vigorously. Special power vehicles use gaseous fuel or electric energy to assist or even replace liquid fuel as the power source of the vehicle. The current special power vehicles are divided into oil-electric hybrid, oil-gas hybrid or pure electric drive. [0003] Among them, the gasoline-electric hybrid vehicle has the advantage of reducing the fuel consumption of the vehicle. It is different from the general gasoline-powered vehicle in that the gasoline-electric hybrid vehicle has more electric motors and rechargeable batteries. When the engine is started, par...

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 Patents(China)
IPC IPC(8): G01R31/36
Inventor 黄柏翁国梁林登禾
Owner AUTOMOTIVE RES & TESTING CENT