Negative plate for lead acid battery

A technology for battery packs and pole plates, which is applied to the electrodes of lead-acid batteries, lead-acid batteries, and battery electrodes, etc. It can solve problems such as shortened life of battery packs, corrosion of positive grid alloys, loss of excess water, etc., to reduce maintenance, The effect of reducing the amount of overcharge and long cycle life

Inactive Publication Date: 2012-07-11
TROJAN BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high overcharging causes loss of excess water, corrosion of the positive grid alloy, and shortened battery life

Method used

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  • Negative plate for lead acid battery
  • Negative plate for lead acid battery
  • Negative plate for lead acid battery

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0038] Example 1: Capacitor Slurry and Capacitor Negative Plate Formation

[0039] First, a carbon negative active material slurry was prepared by mixing 10 lbs of lead oxide powder, 3.8 g of polyester fiber, and 0.135 lbs of expander and carbon additives in a mixer. The lead oxide powder used in this example contained some pure lead. The weight of pure lead plus the weight of lead in lead oxide is 94.69wt% of the lead oxide powder. The expansion agent in each slurry contains 0.1 lbs of BaSO 4 , 0.02 lbs of lignosulfonate sodium salt (Lignin Vanisperse A) and 0.015 lbs of carbon black. Carbon additives for various examples include carbon black, graphite, activated carbon, and combinations of these materials. The specific amounts and types of carbon additives used for each plate are described in specific examples. The amount of carbon addition varied from about 1% to about 12% by mass of lead oxide throughout the test period. If the amount of carbon additive is greater tha...

example 2

[0043] Example 2: Hybrid Negative Plate Formation

[0044] The conventional negative paste described in Comparative Example 1 was used for the top portion of the negative electrode grid, and the capacitor paste described in Example 1 was used for the bottom portion of the negative electrode grid. The surface area of ​​the negative electrode grid covered by the carbon negative slurry varied between approximately 14% and 48% of the negative electrode grid. The resulting hybrid negative plate was then processed as described in Example 1 to form a hybrid negative plate.

example 1-2 and comparative example 1

[0045] Examples 1-2 and Comparative Example 1: Battery Assembly

[0046] Each set is assembled into a single 2 volt battery case. Each battery contains 6 positive plates and 6 negative plates. The plates alternate with conventional separators in between. The positive plate contains a grid of positive electrode plates. Each positive electrode grid was slurried with a positive slurry comprising lead oxide, polyester fiber, water, and sulfuric acid. This plate was then treated in the same manner as the negative plate.

[0047] The tabs of the negative plate of each cell are welded together using known processes. Similarly, the tabs of the positive plates of each cell are welded together using known processes. Then, the assembled battery was filled with an aqueous sulfuric acid solution. Within thirty minutes of filling the cell with acid, the plate formation step began. According to the plate forming steps, a charge is applied to the battery using a constant current formin...

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Abstract

Capacitor pastes for flooded deep discharge lead-acid batteries include lead oxide, a carbon additive, and an aqueous acid. The capacitor paste contains lead and carbon in a lead to carbon mass ratio of about 5:1 to 82:1. Hybrid negative plates for flooded deep discharge lead-acid batteries can be made using such pastes in combination with traditional pastes. The hybrid negative plates include a capacitor paste on a bottom portion of the plate, and a traditional paste on the remainder of the plate. Batteries using the capacitor paste and hybrid plates exhibit improved performance over batteries with conventional plates and pastes and require less overcharge to prevent electrolyte stratification.

Description

technical field [0001] The present invention relates to flooded or wet cell lead-acid electrochemical batteries, and more particularly to negative hybrid electrodes for such batteries and methods of making and using such negative hybrid electrodes. Background technique [0002] A typical flooded lead-acid battery pack consists of positive and negative plates and an electrolyte. The positive and negative active materials are made into slurry, which are respectively coated on the grids of positive and negative electrode plates to form positive and negative plates. The positive and negative active material pastes typically contain lead oxide (PbO or lead(II) oxide). The electrolyte usually consists of an acidic aqueous solution, most commonly sulfuric acid (H 2 SO 4 ). Once the battery pack is assembled, the battery pack undergoes a forming step in which a charge is applied to the battery pack in order to convert the lead oxide of the positive plate to lead dioxide (PbO 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/14
CPCH01M4/583Y02E60/126Y02T10/7016H01M4/14H01M10/06H01M4/56H01M4/73H01M4/362Y02E60/10Y02T10/70
Inventor M·C·霍G·C·贝克莱C·史密斯C·E·斯奈德
Owner TROJAN BATTERY
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