Method for improving utilization rate of active substance of polar plate and equipment thereof

Abstract

Disclosed are a method for improving utilization rate of an active substance of a polar plate and equipment thereof; a pressing roller in a coating-filing machine head is located above a hub in a coating-filling process of a grid mesh belt, wherein the center axis of the pressing roller is parallel to the central axis of the hub; the roller surface of the pressing roller comprises working sectionsB and a non-working section A, and the roller surfaces of the working sections B at the two ends of the non-working section A are inclined surfaces; the grid mesh belt is subjected to coating and filling by a coating-filling machine to prepare a wet unprocessed plate belt, and the wet unprocessed plate belt is subjected to separating and cutting through a separating-cutting machine to obtain a wet polar plate, wherein the lead paste is decreased gradually from the upper part to the lower part of the polar plate; the wet polar plates are stacked in a curing frame; four layers of the wet polarplates are stacked in each frame, and a bakelite plate is placed after two layers are stacked; six stacks of polar plates are arranged in each layer, wherein the tab stacking directions of the wet polar plates in the upper and lower layers are opposite, and 30-40 pieces of wet polar plates are stacked in each stack of the polar plates; and curing and drying are carried out to obtain a polar plate,wherein the upper part of the polar plate is 0.05-0.5mm thicker than the lower part. The lead paste distribution of the polar plate is changed, so that the lead paste is gradually decreased from theupper part of the polar plate to the lower part of the polar plate, thereby improving the utilization rate of the active substance of the whole polar plate.

Description

technical field [0001] The invention belongs to the technical field of lead-acid storage batteries, and in particular relates to a method and equipment for improving the utilization rate of active materials in the polar plates of flooded storage batteries. Background technique [0002] The current production process is to alternately arrange positive plates, separators, and negative plates together to form an electrode group. This assembly structure will produce the following defects when the battery is used for a long time: ① The utilization rate of active materials on the upper part of the plate is higher than that on the lower part; ②Electrolyte stratification after long-term use; ③According to the current transmission direction and current distribution, the resistance of the lower part of the plate is higher than that of the upper part of the plate. [0003] When the battery is charging, electrons flow from the positive electrode to the negative electrode, and the ions a...

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Problems solved by technology

[0002] The current production process is to alternately arrange positive plates, separators, and negative plates together to form an electrode group. This assembly structure will produce the following defects when the battery is used for a long time: ① The utilization rate of active materials on the upper part of the plate is higher than that on the lower part; ② Long-term use leads to electrolyte stratification; ③ According to the current transmission direction and current distribution, the resistance of the lower part of the plate is higher than that of the upper part of the plate.

The number of ions transported in the upper part of the polar plate is much larger than that in the lower part of the polar plate, which causes the active material in the upper part of the polar plate to soften earlier than the active material in the lower part of the polar plate. The lower utilization rate of the active material in the lower part of the polar plate also affects the overall active material utilization rate

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