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Sorting method for adjustable speed cascade utilization power battery

A power battery and battery technology, applied in the field of lithium-ion batteries, to achieve the effects of ensuring consistency, enhancing economy, and improving utilization

Active Publication Date: 2022-02-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing cascade utilization sorting method is difficult to sort the decommissioned batteries in a specific time.

Method used

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  • Sorting method for adjustable speed cascade utilization power battery
  • Sorting method for adjustable speed cascade utilization power battery
  • Sorting method for adjustable speed cascade utilization power battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] According to different requirements, the invention performs step-by-step utilization and sorting on the waste batteries eliminated from electric vehicles at different speeds and precisions. When sorting a group of ladder batteries, the following steps are included:

[0047] Step 1. First, calculate the duration required for a single battery, and use the calculation formula Calculation. Among them, T is the total time requirement for sorting, N is the total number of sorting batteries required, n is the number of equipment channels for battery testing, and t is the time required for sorting each battery.

[0048] Step 2. Through calculation, if the time t is between 1-3h, the batteries are quickly sorted, and the batteries with no obvious shell damage, battery bulging, swelling, and leakage are selected, and the batteries with good appearance are selected. Measure the voltage value of the selected battery, and eliminate the battery whose voltage value drops to the minim...

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Abstract

The invention discloses a speed-adjustable echelon utilization power battery sorting method. The method performs sorting at different speeds according to the actual application scenario requirements of different echelon utilization, and formulates fast, medium speed and slow speed according to the required duration of the sorting. There are three sorting methods, and different sorting strategies are adopted. The invention mainly performs matching and sorting through the battery capacity and the internal resistance under different SOC conditions, and determines the sorting accuracy according to the required sorting speed, so as to realize the sorting of the echelon batteries, so as to ensure the consistency of the battery group. , improve the utilization rate of the power battery and enhance the economy of the battery.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a sorting method for adjustable-speed cascade utilization power batteries. Background technique [0002] With the improvement of the country's requirements for energy conservation and environmental protection and the rapid development of the new energy vehicle industry, the explosive growth of my country's electric vehicle production and sales has driven the growth of power batteries in the same proportion. Decommissioned power batteries still have huge residual value. The power can still meet the needs of various energy storage occasions, but after one use, due to the difference in the use environment, temperature and working state, there will be inconsistencies between the single cells in the battery pack, and even Leakage, short circuit and other problems seriously affect the secondary use of the battery pack. [0003] At present, there is no in-depth ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/387G01R31/389G01R31/392B07C5/344B07C5/34
CPCG01R31/387G01R31/389G01R31/392B07C5/344B07C5/34
Inventor 孙金磊王天如刘瑞航唐传雨马乾
Owner NANJING UNIV OF SCI & TECH