A method for controlling swelling and deformation of valve-controlled sealed lead-acid batteries

A technology of lead-acid batteries and control valves, which is applied in the direction of lead-acid batteries, lead-acid battery construction, secondary batteries, etc., can solve the problems of battery safety hazards, negative impact on the economy, battery deformation, etc., to avoid economic losses, The effect of reducing the amount of thermal deformation and reducing the internal air pressure

Active Publication Date: 2017-12-01
FENGFAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bulging and deformed battery has potential safety hazards, so it will cause users to be highly vigilant, and a large number of complaints or returns due to battery deformation will cause serious negative impacts on the production of battery companies and major economic losses.
There are many factors that cause battery deformation, and the problem of controlling battery swelling and deformation is very difficult and needs to be solved urgently

Method used

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  • A method for controlling swelling and deformation of valve-controlled sealed lead-acid batteries

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Effect test

example 1

[0019]Example 1: For the production of 12V 180Ah batteries, the assembly compression ratio of the pole group is 20%. In the process of adding electrolyte to the battery, the battery is first cooled to a low temperature, and the assembled battery is placed in a freezer at a temperature lower than 0°C for 4 hours. Take out the cooled battery and add electrolyte immediately. The temperature of the electrolyte is cooled to 13°C by cooling acid machine; the temperature of the water bath in the battery formation process is controlled at 20°C; Put on the safety valve; after the valve is closed, let it stand for 72 hours, and then detect the battery swelling deformation of 0.8mm.

example 2

[0020] Example 2: For the production of 12V 1800Ah batteries, the assembly compression ratio of the pole group is 25%; in the process of adding electrolyte to the battery, the battery is first cooled to a low temperature, and the assembled battery is placed in a freezer with a temperature below 0°C for 15 hours , Take out the cooled battery and add electrolyte immediately, the temperature of the electrolyte is cooled to 13°C by cooling acid machine; the temperature of the water bath in the battery formation process is controlled at 25°C; after the battery is formed and charged, when the internal temperature of the battery is 15°C different from the room temperature Fasten the safety valve; put it aside for 72 hours after the valve is fastened, and then detect the bulging deformation of the battery to be 1.0mm.

example 3

[0021] Example 3: For the production of 12V 1800Ah batteries, the assembly compression ratio of the pole group is 23%. In the process of adding electrolyte to the battery, the battery is first cooled to a low temperature, and the assembled battery is placed in a freezer at a temperature below 0°C for 10 hours. Take out the cooled battery and add electrolyte immediately. The temperature of the electrolyte is cooled to 14°C by cooling acid machine; the temperature of the water bath in the battery formation process is controlled at 30°C; Install the safety valve; after closing the valve, let it stand for 72 hours, and then detect the battery swelling and deformation to be 1.8mm. Use the vacuum equipment installed in the acid adding machine to pump air out of the battery, detect the deformation of the battery during the pumping process, and stop the pumping when the deformation of the battery is less than 1mm.

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Abstract

A method for controlling the swelling and deformation of a valve-controlled sealed lead-acid battery, including the steps of assembling the pole group into the tank, sealing the cover, adding electrolyte to the battery, forming the battery, and buckling the safety valve. The assembly compression ratio is controlled between 20% and 25%. In the process of adding electrolyte to the battery, the battery is firstly frozen at low temperature, and the assembled battery is placed in an environment with a temperature lower than 0°C for 4-15 hours. After the frozen battery is taken out, the electrolyte solution is added immediately, and the temperature of the electrolyte solution is controlled below 15°C; the temperature of the water bath in the battery formation process is controlled at 20-30°C. The VRLA lead-acid storage battery produced by the method of the present invention has significantly improved the bulging deformation of the battery compared with the battery produced by the current process, and eliminated or greatly reduced the bulging deformation of the VRLA battery. The huge economic loss caused by the deformation and return to the enterprise.

Description

technical field [0001] The invention relates to a storage battery production method, in particular to a method for controlling swelling and deformation of a valve-controlled sealed lead-acid storage battery after forming and charging, and belongs to the technical field of storage batteries. Background technique [0002] Valve-regulated sealed lead-acid batteries are referred to as VRLA batteries for short. Its basic feature is that it does not need to add acid and water for maintenance during use. The battery is a sealed structure. There is a one-way exhaust valve (safety valve) on the battery cover. When the air pressure inside the battery rises to a certain value, the exhaust valve automatically opens to discharge the gas, and then automatically closes the valve to prevent air from entering the battery. Because VRLA batteries do not emit acid or acid mist to corrode equipment and pollute the environment, they are popular with users and have become more and more widely used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/12H01M10/14
CPCH01M10/12H01M10/121H01M10/14Y02E60/10Y02P70/50
Inventor 赵从印孙晓飞邬会杰许丽丽吴学谦
Owner FENGFAN
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