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

Method for calibrating SOC of lithium-ion battery

A power battery and lithium-ion technology, applied in the field of lithium-ion battery calibration, can solve the problems of battery charging efficiency or discharge rate instability, SOC estimation error, error increase, etc., to achieve easy implementation, high calibration accuracy, and energy saving. Effect

Inactive Publication Date: 2013-10-09
TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD
View PDF4 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, due to the influence of temperature, current and other factors, the charging efficiency or discharge rate of the battery is not constant, and there is a cumulative error in calculating SOC by cumulative current integration.
If not corrected regularly, this error will gradually increase over time, resulting in incorrect SOC estimation

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 calibrating SOC of lithium-ion battery
  • Method for calibrating SOC of lithium-ion battery
  • Method for calibrating SOC of lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The lithium battery SOC calibration method involved in the present invention will be described in detail below in conjunction with the accompanying drawings. A general hybrid drive system mainly includes an engine; a main motor (generator), which is controlled by a controller of the main motor (generator); and a battery, which is managed and controlled by a battery management system (BMS). The vehicle control mechanism controls the coordinated work of the motor controllers of the vehicle.

[0028] The SOC calibration method that the present invention relates to comprises the following steps:

[0029] a. Determine whether the battery meets the SOC calibration conditions, if so, execute step b, if not, exit;

[0030] b. Send the SOC calibration command.

[0031] c. Receive the SOC calibration mode signal, if the signal is received, execute step d, if no signal is received, return to step a;

[0032] d. Determine whether the battery voltage reaches the upper limit thres...

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 method for calibrating the SOC of a lithium-ion battery which is applied to a hybrid power vehicle. According to the method for calibrating the SOC of the lithium-ion battery, the SOC of the battery is calibrated in the traveling process of the vehicle under the combined action of a BMS and an entire vehicle control system, the threshold value of the battery is used as a datum point, and calibration accuracy is high; an entire vehicle controller participates in the calibration process, the calibration of the SOC is easy to implement, stable and reliable, the SOC of the battery can be calibrated at any time according to the demand in the traveling process of the vehicle, and energy is saved.

Description

technical field [0001] The invention relates to a lithium ion battery calibration method, which is suitable for electric vehicles and hybrid vehicles. Background technique [0002] With the promotion and popularization of new energy vehicles, more and more attention has been paid to electric drive vehicles. Commonly used batteries for gasoline-electric hybrid vehicles include lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries and lithium batteries. Lithium-powered batteries are more and more popular because of their high specific energy, light weight, and long life. The first choice for gasoline-electric hybrid vehicles. Hybrid vehicles, especially heavy hybrid vehicles, achieve energy saving effects by coordinating the energy output between the engine and the battery during driving, which requires the battery management system to display and report accurate battery power (SOC) at all times, and the vehicle control mechanism In order to determine...

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): G01R31/36
Inventor 王润鑫何斌柴晓飞
Owner TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD