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

Method for selecting low-voltage storage battery

A storage battery and low-voltage technology, which is applied in the field of selecting defective batteries, can solve the problems of defective product selection, long selection time, and insignificant loss of battery capacity, etc., and achieve the effect of improving product quality, reducing product complaints and maintenance rates

Active Publication Date: 2012-05-30
湖南科霸汽车动力电池有限责任公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the low voltage phenomenon is not serious, the capacity loss of the battery will not be obvious, so it cannot be judged by the first method
Even if the second method is used to discharge the battery to the cut-off voltage, there is still a part of the capacity inside the battery, which will cause the open circuit voltage of the battery to not decrease significantly in a long period of time, so it will result in a long selection time or failure at all. Pick out defective products

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

[0013] The battery to be selected is 6 Ni-MH batteries with a 1C discharge capacity of 10Ah. Connect them in series and discharge continuously to the set voltage value of 6V, that is, the set voltage value of each Ni-MH battery is 1V, and then the set voltage value of 6V Under the condition of constant voltage discharge to 64 hours, stop discharging, and then put it aside for 10 days at 25°C, monitor the open circuit voltage of the battery, if there is a battery with a voltage lower than the average voltage of normal batteries by 0.2V, then the battery is a low-voltage battery.

Embodiment 2

[0015] The steps are basically the same as in Example 1, except that the constant voltage discharge stops when the discharge current is less than 10mA.

Embodiment 3

[0017] The battery to be selected is a single nickel battery with a 1C discharge capacity of 50Ah, continuously discharged to a set value of 0.8V, and then discharged at a constant voltage for 6 hours under the set voltage value, then stopped discharging, and then shelved at 60°C for 3 Every day, monitor the open circuit voltage of the battery. If the voltage of any battery is lower than the average voltage of normal batteries by 0.05V, the battery is a low-voltage battery.

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 method for selecting a low-voltage storage battery, comprising the following steps: continuously discharging the batteries to be selected to a set value; continuously discharging at the constant voltage of the set voltage to the set time or the battery current being lower than the set value, stopping discharging; keeping the discharged batteries for 1-30 days at 25-60 DEG. C and monitoring the open circuit voltage of the batteries, the batteries with the voltage being lower than the average voltage of the normal battery for 0.01V-0.5V are the low-voltage batteries. The method is fast and has high efficiency and no damage to the battery; the badness battery can be prevented and the product quality can be improved; the product complaint and repairing rate can be reduced.

Description

technical field [0001] The invention relates to a method for selecting defective batteries, in particular to a method for selecting low-voltage batteries. Background technique [0002] During the manufacturing process of the battery, due to foreign objects, plate burrs, diaphragm perforation and internal leakage (connected battery) and other reasons, the battery may have low voltage. In order to select these defective products, there are two methods currently used. One is to charge the battery to a certain capacity after the battery has been tested for capacity, and then test the capacity again after leaving the battery for a period of time, and judge qualified products and unqualified products according to the amount of capacity loss. Another method is to discharge the battery to the cut-off voltage after the battery has been tested for capacity, and then measure the open circuit voltage of the battery after leaving it for a period of time, and judge qualified produc...

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 Patents(China)
IPC IPC(8): G01R19/165G01R31/36
Inventor 邓江南丸山弘美胡向宇
Owner 湖南科霸汽车动力电池有限责任公司