Stable capacity calibration method for long-time stored retired lithium battery

A battery capacity and calibration method technology, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problems of different storage environments for storage time and different recovery time of lithium batteries.

Active Publication Date: 2018-08-03
DALIAN UNIV OF TECH
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the health status of each decommissioned single lithium battery and the storage time and storage environment of decomm

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
  • Stable capacity calibration method for long-time stored retired lithium battery
  • Stable capacity calibration method for long-time stored retired lithium battery
  • Stable capacity calibration method for long-time stored retired lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific examples. The present invention uses a decommissioned lithium iron phosphate battery that has been stored for one year as the research object. The present invention will be further described in conjunction with the flow chart and specific examples. The specific process is as follows:

[0030] Step 1: Disassemble the old retired lithium iron phosphate battery pack to obtain lithium iron phosphate battery cells. Under good light conditions, visually inspect the appearance of the power lithium battery cell, and select a battery with no cracks, no deformation, and no leakage for capacity testing.

[0031] Step 2: Through information collection, it is known that this batch of batteries has a nominal voltage of 3.2V and a nominal capacity (C n ) is a 10Ah lithium iron phosphate battery.

[0032] Step 3: Activate the lithium iron phosphate battery selected through ...

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 belongs to the technical field of storage batteries, and provides a stable capacity calibration method for a long-time stored retired lithium battery. The method comprises the steps: carrying out the activation processing of a battery cell at a small multiplying power after the appearance inspection and information collection of a long-time stored retired lithium battery cell; carrying out the room temperature capacity testing; collecting the capacity Q data and voltage V data in a room temperature capacity testing process, and drawing a charging capacity increment curve dQ/dV-Vmap; solving the difference of X-axis coordinate data corresponding to a peak value of the capacity increment curve in a former and latter testing process through combining with the charging capacityincrement curve, and determining whether the capacity value in the testing process is the stable value of the retired battery or not in a testing process according to the difference. The method solvesa problem that a conventional battery capacity calibration method is not accurate in the calibration of the capacity of the long-time stored retired lithium battery, and lays an application foundation for the safe and reliable stepped reuse of a subsequent retired battery.

Description

technical field [0001] The invention belongs to the technical field of accumulators, and in particular relates to a method for calibrating the stable capacity value of decommissioned lithium batteries stored for a long time. Background technique [0002] Environmental pollution and energy depletion are two major problems facing mankind. In order to cope with the dual pressure of environment and energy, countries all over the world regard the development and utilization of new energy as an important strategy for sustainable development. In recent years, most countries in the world have regarded the development of electric vehicles as an important way to save energy and reduce emissions. [0003] The power battery is one of the core components of the electric vehicle, and the performance index of the power battery directly affects the overall performance of the electric vehicle. In order to ensure the driving and safety performance of electric vehicles, when the electric vehi...

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): G01R31/36
CPCG01R31/367
Inventor 刘伟嵬王海将董萌萌王爽余跃
Owner DALIAN UNIV OF TECH
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