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

Battery sorting method

A battery and sorting technology, which is applied in sorting and other directions, can solve problems such as limitations, inconsistencies that cannot be eliminated, battery cycle life attenuation, etc., to achieve efficient power supply, increase cycle life and charge and discharge performance, and reduce costs.

Active Publication Date: 2017-10-03
威胜能源技术股份有限公司
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with the battery, the structure of the battery pack is more complicated, rather than the proportion of the battery being enlarged. The production process and use environment of the same type of battery are different, resulting in more or less inconsistencies in the capacity, internal resistance and voltage platform of the battery. Inconsistency, and this inconsistency cannot be eliminated, and the performance of the lithium battery pack is quite demanding on the consistency of the battery
[0005] Practice has proved that the actual cycle life of a battery with a single cycle of about 1,000 times is less than 200 times after being grouped.
The reason for this phenomenon is not that the cycle life of a certain battery in the battery pack is attenuated to about 200 times, but that the capacity of the battery pack is affected by the remaining capacity of the battery pack on the basis of satisfying safety. Limitations of the smallest and smallest rechargeable batteries

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
  • Battery sorting method
  • Battery sorting method
  • Battery sorting method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0082] Hereinafter, one hundred 26650 lithium iron phosphate batteries with a rated capacity of 3Ah and a nominal voltage of 3.2V are taken as an example to introduce the battery sorting method of the present invention.

[0083] (1) Calculate the instantaneous charging DC internal resistance and instantaneous discharge DC internal resistance of the battery to be sorted, and use the instantaneous charging voltage in the first recording point of the last charging state in a batch of battery charge and discharge cycle data as U 1 , The charging current is set to I 1 , The voltage of the last recording point of the previous shelving state is set to U 0 , Then the instantaneous DC internal resistance R of the battery in this SOC state 1 =(U 1 -U 0 ) / I 1 ; Similarly, the instantaneous discharge voltage in the first recording point of the last discharge state is set to U 2 , The discharge current is set to I 2 , The voltage of the last recording point of the previous shelving state is set...

specific Embodiment 2

[0104] The following uses a 25Ah lithium iron phosphate battery with a rated capacity of 25Ah and a nominal voltage of 3.2V as an example to introduce the battery sorting method of the present invention.

[0105] (1) The battery is sorted for the instantaneous charge and discharge DC internal resistance, and the method for calculating the instantaneous charge and discharge DC internal resistance is the same as that of Embodiment 1. After that, the instantaneous charging and discharging instantaneous resistance data of each batch of batteries in the same state are summarized, and the instantaneous charging DC internal resistance of each battery is divided by the instantaneous discharging DC internal resistance, and the quotient is greater than 1 into a group, namely Batteries with instantaneous charging DC internal resistance greater than instantaneous discharging DC internal resistance are divided into one group; other batteries are divided into another group, as shown in Table 2 ...

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 sorting method. Batteries are sorted through three reference quantities of charging and discharging instantaneous internal resistance, battery capacity, and corresponding voltage values of different SOC of the batteries. The batteries with same parameters can be sorted accurately and reliably, so that the batteries with good conformance are assembled as a battery pack; the cycling life and charging and discharging performance of the matched battery pack are guaranteed so that the battery pack can supply electricity for electrical equipment safely, stably and efficiently; and the cycling life of the battery pack is prolonged, the charging and discharging performance of the battery pack is improved, so that cost of the battery pack is reduced.

Description

Technical field [0001] The invention relates to the technical field of battery detection and sorting, in particular to a battery sorting method. Background technique [0002] As we all know, with the widespread use of fossil fuels, environmental pollution has become a worldwide problem. Disasters such as large areas of smog in the north, urban heat island effect, acid rain, etc. are sounding alarm bells time and time again for mankind. Therefore, with this increasingly serious environmental problem, the goal of finding an environmentally friendly energy source has become urgent. Environmental pollution and energy crisis are spurring scientific research to find new energy sources to solve these two major problems. [0003] Batteries, as a storage and conversion carrier of electrical energy, have received extensive attention because of their extremely high electrical energy conversion efficiency without affecting the environment. At present, from small electrical equipment such as ...

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): B07C5/344
Inventor 李霖黎朝晖蒋凯方瑛王康丽胡林李建颖何亚玲陈金玲张玘徐振轩
Owner 威胜能源技术股份有限公司
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