Method for fast detecting cycle life of lead-acid accumulator

A lead-acid battery, cycle life technology, applied in the direction of measuring electricity, measuring electrical variables, measuring current/voltage, etc., can solve the problems of reducing the effective surface area of ​​the negative plate, unable to recover braking energy, unable to truly reflect the failure mode of the battery, etc. Achieve the effect of shortening detection time, saving cost and energy, and rapid detection

Inactive Publication Date: 2011-04-13
张天任
View PDF3 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During operation, the negative plate accumulates to form non-renewable sulfates, which significantly reduces the effective surface area of ​​the negative plate, making it unable to provide the energy necessary to start the engine and accelerate, and to recover braking en...

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take the state of charge window of 30%-80% as an example for illustration. The 12v12Ah battery is tested as follows.

[0019] (1) First discharge the battery with a constant current of 6A (0.5C) to a cut-off voltage of 10.5V, and then charge it with a constant voltage of 15±0.05V and a current limit of 3A (0.225C) for 3-5h, and cycle like this for 5 times. The five-time battery discharge capacity is: 12.1Ah, 12.31Ah, 12.26Ah, 12.40Ah, 12.3Ah, and the fourth-time capacity value of 12.4Ah is the actual capacity of the battery

[0020] (2) Determine the partial state-of-charge voltage of the battery:

[0021] A: 80% charged charging voltage is determined: the battery in step (1) is charged at a current limiting rate of 0.25C at a rate of 3A to a voltage value of 14.5V, and then discharged at a constant current of 6A (0.5C) to a cut-off voltage of 10.5V, and the discharge is measured The capacity is 9.92Ah, and compared with the actual capacity in step (1), the upper limi...

Embodiment 2

[0025] Take the state of charge window of 60%-80% as an example for illustration. The 12V100Ah battery shall be tested as follows.

[0026] (1) First discharge the battery with a constant current of 33.3A (0.33C) to a cut-off voltage of 10.5V, and then charge it with a constant voltage of 1540.05V and a current limiting current of 22.5A (0.225C) for 3-5h, and cycle like this for 5 times. The five discharge capacities of the battery are: 102.5Ah, 103Ah, 104Ah, 104.5Ah, 103.8Ah, and the fourth discharge capacity value of 104.5Ah is the actual capacity of the battery

[0027] 2) Determine the partial state-of-charge voltage of the battery:

[0028] A: 80% charged charging voltage is determined: the battery in step (1) is charged at a current limiting rate of 0.25C at a rate of 25A to a voltage value of 14.7V, and then discharged at a constant current of 33.3A (0.33C) to a cut-off voltage of 10.5V, measured The discharge capacity is 83.6Ah, and compared with the actual capacity ...

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 discloses a method of fast detecting the cycle life of a lead-acid accumulator, which comprises the following steps of detecting real release capacity at first; then determining charge and discharge voltage of partial charge state of the accumulator; determining the charge voltage of the partial charge state; determining the discharge voltage of partial charge state so as to ensure that the accumulator circularly works at the charge and discharge voltage U1 and U2, is charged to U1/each accumulator at the limited current of 0.2 to 2C, and is discharged to U2/ each accumulator as one cycle at the 2 to 4C-time large current; detecting the capacity after a plurality of times of cycle; comparing the measured discharge capacity with the actual capacity; and judging that the accumulator fails if the measured capacity is lower than 80% of the actual capacity. The invention has the advantages of actually reflecting the failure mode of the lead-acid accumulator for a power-driven automobile during operation, obviously shortening the detection time, and greatly saving the cost and energy sources.

Description

technical field [0001] The invention relates to the field of preparation of valve-regulated lead-acid batteries, in particular to a method for quickly detecting the cycle life of supercapacitor batteries and lead-acid batteries for electric vehicles. Background technique [0002] Cycle life, the unit is the number of times, it is an important indicator of the battery. [0003] Conventional life testing tests take too long, at least 4-5 months, and long-life battery tests take 6-12 months. There have been some rapid life test methods in the industry, and it has been confirmed by many enterprises that these rapid life test methods cannot reflect the real life of the battery, that is, they cannot truly reflect the failure mode of the lead-acid battery. The reasons are: the discharge current is too large, which deviates too much from the actual use value; the charging current is too large, and the water loss is large; due to the large charging and discharging current, the failu...

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): G01R31/36G01R19/165
Inventor 胡新春陈飞王殿龙任安福马换玉王晓琼
Owner 张天任
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