Method for testing opening and closing pressure of gum cap of safety valve of lead-acid accumulator and special testing device thereof

A technology of lead-acid battery and detection device, which is applied in the direction of pressure difference measurement between multiple valves, measurement device, and measurement of fluid pressure. It can solve the problems of detection data influence, deviating from the working state of safety valve, etc., and achieve convenient detection and operation. Effect

Active Publication Date: 2010-10-13
ZHEJIANG TIANNENG BATTERY JIANGSU +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some methods are even seriously separated from the actual working state of the safety valve (for example, some simulate the detection head into the water for detection), which has a great impact on the detection data

Method used

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  • Method for testing opening and closing pressure of gum cap of safety valve of lead-acid accumulator and special testing device thereof
  • Method for testing opening and closing pressure of gum cap of safety valve of lead-acid accumulator and special testing device thereof

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Embodiment Construction

[0017] The detection method for the opening and closing pressure of the rubber cap of the lead-acid battery safety valve includes the following steps:

[0018] (1) Test at an environment of 25±5°C, connect the safety valve to the liquid injection hole of the battery middle cover of the analog detection head of the special detection device and compact it, and drop an appropriate amount of water into the groove around the liquid injection hole Water, it is advisable not to pass through the lower edge of the safety valve 9 rubber cap, and then cover the transparent cover of the analog detection head on the battery cover; then insert one end of the plastic tube into the liquid injection below the battery cover holes to ensure no air leakage;

[0019] (2) Close the pressure relief valve on the plastic pipe in the special detection device, open the stop valve, apply pressure to the pressure valve, pay attention to the movement of the rubber cap of the safety valve 9, and it can be c...

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Abstract

The invention discloses a method for testing opening and closing pressure of a gum cap of a safety valve of a lead-acid accumulator and a special testing device thereof. The method comprises the following steps: (1) testing in an environment at a temperature of between 20 and 30 DEG C, connecting the safety valve to a liquid filling port on a battery middle cap of the special testing device, dripping a proper amount of water in a groove surrounding the liquid filling port, covering a transparent cover plate on the battery middle cap, and inserting the pipe orifice on one end of a plastic pipeinto a liquid filling port under the battery middle cap; and (2) closing a pressure relief valve in the plastic pipe, opening a stop valve, pressurizing a boost valve, recording the reading on a pressure gauge when air bubbles emerge from the lower edge of the rubber cap as a open valve pressure, closing the stop valve, opening the pressure relief valve to relive pressure, and recording the reading on the pressure gauge when no air bubble emerges from the lower edge of the rubber cap and the pointer on the pressure gauge does not fall any more as a closed valve pressure. The method has the advantages that: the testing operation is convenient, visual and quick; and the tested data can be completely used for the quality control of the safety valve and production instruction.

Description

technical field [0001] The invention relates to a valve-controlled sealed lead-acid battery, in particular to a detection method and a special detection device for the opening and closing pressure of a safety valve rubber cap of a valve-controlled sealed lead-acid battery. Background technique [0002] The safety valve is a very important part of a small valve-regulated sealed lead-acid battery, also known as the exhaust valve. The opening and closing pressure of the rubber cap of the safety valve is a very critical performance indicator. Its working principle is: when the gas pressure inside the battery reaches a certain value, the rubber cap of the safety valve will automatically open for exhaust and pressure relief, and when the internal pressure of the battery drops to a certain limit value, it will automatically shrink and close, so as to achieve Requirements for battery safety performance. [0003] Due to design requirements, different battery manufacturers have diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L13/00G01M3/08G01M3/28
Inventor 王杜友任安福杨惠强陈建强胡建强
Owner ZHEJIANG TIANNENG BATTERY JIANGSU
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