A method and device for detecting the aging performance of a lead-acid battery safety valve

A kind of technology of aging performance and lead-acid storage battery, applied in the direction of measuring device, mechanical valve test, mechanical component test, etc., can solve the problems of not being able to truly reflect the working condition of the safety valve, misjudgment, affecting battery life, etc.

Active Publication Date: 2020-10-30
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the safety valve of the recycled lead-acid power battery is frequently opened and closed with each use cycle. The above-mentioned aging test method cannot truly reflect the working conditions of the safety valve, causing misjudgment and affecting the battery life. cause an accident

Method used

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  • A method and device for detecting the aging performance of a lead-acid battery safety valve
  • A method and device for detecting the aging performance of a lead-acid battery safety valve
  • A method and device for detecting the aging performance of a lead-acid battery safety valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, a device for testing the aging performance of the lead-acid battery safety valve includes: a battery tank, a compressed air source 4, a vacuum pump 5, an inflation tube 6 and an exhaust tube 7.

[0033] The compressed air source 4 is used to inflate the battery tank to maintain a positive pressure in the battery tank. Generally, the compressed air source 4 can use a steel cylinder with compressed air; the vacuum pump 5 is used to pump air to the battery tank to maintain a negative pressure in the battery tank. The compressed air source 4 and the vacuum pump 5 are switched to maintain positive and negative pressures in the interval of the battery tank, simulating the state of charging and discharging of the battery during actual use. The two ends of the inflation tube 6 are respectively connected to the compressed air source 4 and the battery tank; the two ends of the air extraction tube 7 are respectively connected to the vacuum pump 5 and the...

Embodiment 2

[0041] The device in Example 1 was used for detection. The temperature of the incubator was set at 45°C.

[0042] The detection method comprises the following steps:

[0043] (1) Detect the initial valve opening pressure and valve closing pressure of the safety valve sample, which are respectively K 0 and B 0 ;

[0044] (2) Install the safety valve sample on the valve seat of the empty battery tank cover filled with electrolyte, so that positive pressure and negative pressure are maintained in the empty battery tank in sequence. The positive pressure value is set to 20kPa, and the negative pressure value is Set to -10kP, one positive pressure and one negative pressure are one cycle, each positive pressure and negative pressure are maintained for 5 minutes respectively, and the valve opening pressure K of the safety valve sample is tested again after 80 cycles n and closing valve pressure B n ;

[0045] (3) Calculate the rate of change of valve opening pressure and valve cl...

Embodiment 3

[0052] The device in Example 1 was used for detection. The temperature of the incubator was set at 55°C.

[0053] The detection method comprises the following steps:

[0054] (1) Detect the initial valve opening pressure and valve closing pressure of the safety valve sample, which are respectively K 0 and B 0 ;

[0055] (2) Install the safety valve sample on the valve seat of the empty battery tank cover filled with electrolyte, so that positive pressure and negative pressure are maintained in the empty battery tank in sequence. The positive pressure value is set to 45kPa, and the negative pressure value is Set to -20kPa, one positive pressure and one negative pressure are one cycle, each positive pressure and negative pressure are maintained for 2 minutes respectively, and the valve opening pressure K of the safety valve sample is tested again after 100 cycles n and closing valve pressure B n ;

[0056] (3) Calculate the rate of change of valve opening pressure and valv...

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Abstract

The invention discloses a method and device for detecting the aging performance of a lead storage battery safety valve. According to the method disclosed by the invention, by testing a valve opening and closing pressure change of the safety valve in a state of simulating cyclic use of a battery and judging the aging condition of the safety valve according to a valve opening and closing pressure change ratio, a result is more real and reliable and can accurately reflect the actual aging condition of the safety valve; and a more effective test measure is provide for material selection and batchinspection for the safety valve. The device disclosed by the invention is developed for the method. An existing battery tank is applied to detection after being transformed, and is matched with the safety valve and closer to a use state of the safety valve; and a detection result is more real and reliable.

Description

technical field [0001] The invention relates to the technical field of lead-acid battery detection, in particular to a method and device for detecting the aging performance of a lead-acid battery safety valve. Background technique [0002] Lead-acid batteries have a history of more than 150 years and have been used in a wide range of fields. In recent years, electric vehicles have developed rapidly in my country due to their better mobility performance, lower storage space requirements and excellent price advantages. Thanks to this, the battery industry has also developed rapidly. [0003] Lead storage battery is a reversible DC power supply, which can convert chemical energy into electrical energy, and also convert electrical energy into chemical energy. Lead storage battery is mainly composed of electrolyte, tank cover and pole group. The electrolyte of lead storage battery is sulfuric acid solution. The pole group is mainly composed of positive plate, negative plate and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/003
CPCG01M13/00
Inventor 李桂发郭志刚毛书彦刘玉邓成智李亚
Owner TIANNENG BATTERY GROUP
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