Polar plate for battery, manufacturing method of polar plate, polar plate group with polar plates and lead storage battery

Abstract

The invention provides a polar plate for a polar plate for a battery, a manufacturing method of the polar plate, a polar plate group with the polar plates and a lead storage battery. The polar plate comprises a current collector and a active substance layer kept by the current collector, wherein the current collector is an expanded grid manufactured with a cutting and drawing method, the polar plate is composed of two protruding end parts with protrusions and a flat middle part between the two end parts, the thickness of each end part is more than that of the middle part, and when the thickness of the middle part is set to be H2 and the height difference between each end part and the middle part is H1, the ratio of H1/H2 is 3-9%. According to the invention, by means of designing the polar plate to be provided with protrusions at the end parts to form the protruding end parts with the protrusions and making the thickness of each end part of the polar plate more than that of other parts of the polar plate, a distance between a positive polar plate and a negative polar plate is properly enlarged, so that the cycle life, capacity and charging efficiency of the battery are greatly increased.

Description

technical field [0001] The present invention relates to a pole plate for a battery and a manufacturing method thereof, in particular to a pole plate for a battery with a simple process, low cost and good capacity, cycle life, and charging efficiency, a manufacturing method thereof, and a pole plate with the pole plate Plate packs and lead accumulators. Background technique [0002] In addition to being used as a power source for starting vehicles and as a backup power source, lead-acid batteries are also widely used as main power sources, that is, as power sources for independent charging and discharging equipment such as electric vehicles, electric bicycles, electric motorcycles, electric scooters, small Power sources for electric mopeds, golf carts, etc., batteries for solar energy, etc. In these applications, the working characteristics of lead-acid batteries are: large current when starting, small discharge current when driving, and long discharge time. At the same tim...

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Problems solved by technology

[0006] Chinese utility model patent CN201820837U discloses a kind of equal deflection plaster board for double-sided coating. The technical problem to be solved is: the working surface at the lower end of the existing plaster board is flat. The pressure makes the plate concave, the distance between the masking plate and the plate increases, and the amount of paste in the middle increases relatively. The raw plate after double-sided coating is often thicker in the middle and thinner on both sides, and the plate is seriously bent after curing. , affecting the quality of the plate

The technical problem to be solved by this method is: increase the porosity of the positive plate by reducing the paste density of the positive plate, thereby improving the rapid discharge characteristics of the sealed lead-acid battery, but in order to suppress the reduction of the life due to the reduction of the paste density , an aqueous dispersion of polytetrafluoroethylene added to the lead paste

Moreover, in the prior art, the design of the pole plate has also been considered and some methods have been found, for example, as mentioned above, by reducing the density of the lead paste of the positive plate to improve the porosity of the positive plate, thereby improving the performance of the sealed lead-acid battery. Rapid discharge characteristics, but reducing the density of the lead paste will lead to a decrease in battery life; or

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