Lead-acid accumulator with coil structure and manufacturing method thereof

Abstract

The invention relates to a lead acid battery with winding structure and its manufacturing method. A lug of pole is inwoven to and fixed to a lead meshwork, making electrical connection. Coating active material of positive and negative electrode on the lead meshwork makes a positive and negative electrode plate. Winding the positive, spacer plate and negative in sequence makes a battery core. The battery core is fixed by an excircle fixture, then is installed to a battery case perpendicularly with a lid being added for packaging. The invented battery possesses features of low internal resistance, high specific energy, strong capability of charging and discharging with large current, long service life and wide application area. Moreover the technique of method for manufacturing the battery is easy and efficiency.

Description

Technical field: [0001] The invention relates to a novel winding structure lead-acid storage battery and a manufacturing method thereof. Background technique: [0002] Lead-acid batteries are widely used in energy, electricity, transportation, communications, computers, military and other fields. There are still problems in the plate material and winding process of the existing lead-acid battery with wound structure. Due to the low mechanical strength of lead, punched lead foil is used as the grid material of the wound structure battery, the material calendering process and the battery plate. The manufacturing process of winding is complicated, the cost is high, and it has not been widely used. The cylindrical small-density battery disclosed in patent 98202241.7 adopts expanded mesh grid, and the stress concentration generated in the manufacturing process of the grid material causes severe stress corrosion of the grid material in the electrolyte, and it is very easy to crac...

AI Technical Summary

Problems solved by technology

There are still problems in the plate material and winding process of the existing lead-acid battery with wound structure. Due to the low mechanical strength of lead, punched lead foil is used as the grid material of the wound structure battery, the material calendering process and the battery plate. The manufacturing process of winding is complicated, the cost is high, and it has not been widely used

The cylindrical small-density battery disclosed in patent 98202241.7 adopts expanded mesh grid, and the stress concentration generated in the manufacturing process of the grid material causes severe stress corrosion of the grid material in the electrolyte, and it is very easy to crack the plate, and the grid is resistant to The ability of the active material to deform during the charge-discharge cycle is poor, which can easily cause the separation of the active material from the grid

cause premature battery failure

At the same time, the process method of manufacturing lead-acid batteries with a wound structure is adopted by the expanded grid. Since the material of the expanded grid is easy to produce sharp-edged protrusions during the punching and stretching process, the positive and negative active materials are coated and connected with the separator. After being wound at intervals, the protrusion is likely to cause a short circuit of the battery, resulting in battery failure

[0003] At the same time, because the manufacturing method of this kind of lead-acid battery with winding structure is still at the level of the traditional battery manufacturing method, there is no targeted, simple and effective process for the specific structure and properties of this kind of lead-acid battery. production method

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