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Lead-acid battery grid alloy for power

A lead-acid battery and grid technology, applied in the direction of electrode carrier/collector, etc., can solve the problems of grid and active material binding ability reduction, grid corrosion, battery capacity decline, etc., to achieve enhanced deep charge and discharge resistance, Increased cycle life, enhanced electrical conductivity, and

Active Publication Date: 2012-09-12
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The lead-acid battery grids currently produced for power are susceptible to stratification due to sulfuric acid concentration during use, and the concentration polarization is enlarged, resulting in polarization impedance and reducing the utilization of active materials. Under deep discharge conditions , due to the reduction of the combination ability of the grid and the active material, the battery capacity will be greatly reduced, and the active material of the plate is prone to fall off, resulting in corrosion of the grid, which leads to an increase in the internal resistance of the battery and a shortened cycle life. Shallow deep discharge range of grid alloys for power lead-acid batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Put 93.5kg of electrolytic lead into the crucible furnace, heat up to 600~660℃, add 500gAl and 500gCa successively, stir at 15-20r / min for 20~30 minutes, and cool to 350~400℃;

[0054] (2) Add 5kg of metallic tin, stir at 15-20r / min, add 500g of metallic sodium while stirring, continue to stir for 10-30min after the addition is complete, then grid alloy can be obtained;

[0055] The above grid alloy is made into a lead-acid battery (6-DZM-12). It is detected that the internal resistance of the lead-acid battery is 12mΩ, the first two-hour rate capacity discharge is 136min, the cycle is 50 times, the capacity discharge is 128min, and the cycle is 100 times. Capacity discharge 122min, cycle 200 times, capacity discharge 114min.

Embodiment 2

[0057] (1) Put 98.41kg of electrolytic lead into the crucible furnace, heat up to 600-660℃, add 30gAl and 80gCa successively, stir at 15-20r / min for 20-30 minutes, and cool to 350-400℃;

[0058] (2) Add 1.4kg of metallic tin, stir at 15-20r / min, add 80g of metallic sodium while stirring, continue to stir for 10-30min after the addition is complete, then grid alloy can be obtained;

[0059] The above grid alloy is made into a lead-acid battery (6-DZM-12). It is detected that the internal resistance of the lead-acid battery is 6mΩ, the first two-hour rate capacity discharge is 138min, the cycle is 50 times, the capacity discharge is 135min, and the cycle is 100 times. Capacity discharge 130min, cycle 200 times, capacity discharge 120min.

Embodiment 3

[0061] (1) Put 98.21kg of electrolytic lead into the crucible furnace, heat up to 600-660℃, add 30gAl and 80gCa successively, stir at 15-20r / min for 20-30 minutes, and cool down to 350-400℃;

[0062] (2) Add 1.6kg of metallic tin, stir at 15-20r / min, add 80g of metallic sodium while stirring, continue to stir for 10-30min after the addition is complete, then grid alloy can be obtained;

[0063] The above grid alloy is made into a battery (6-DZM-12), the internal resistance of the battery is detected to be 7mΩ, the first two-hour rate capacity discharge is 135min, the cycle is 50 times, the capacity discharge is 125min, the cycle is 100 times, and the capacity discharge is 120min. Cycle 200 times and discharge the capacity for 115 minutes.

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Abstract

The invention discloses a lead-acid battery grid alloy for power. The lead-acid battery grid alloy for power comprises the following raw materials by weight percentage: 0.05-0.50% of Ca, 1-5% of Sn, 0.05-0.50% of Na, 0.01-0.50% of Al and 93.5-98.89% of Pb. The invention further discloses a method for preparing the lead-acid battery grid alloy for power. The metal Na and the metal Sn added in the grid alloy improve combination performance of the grid and activate substances, prolong service life of the battery and reduce the ohmic resistance of the prepared lead-acid battery grid alloy for power by about 30% compared with the existing lead-acid battery grid alloy for power prepared by grid alloys, and deep discharging performance and circulation service life are improved by about 15%.

Description

Technical field [0001] The invention relates to the field of lead-acid batteries, in particular to a grid alloy of lead-acid batteries for power. Background technique [0002] Lead-acid batteries were invented by the French Plante in 1859. It has a history of more than 100 years. It has made great progress in the theoretical research of lead-acid batteries, product types and varieties, and product electrical performance. . [0003] Since the invention of lead-acid batteries, due to its low price, easy availability of raw materials, full reliability in use, suitable for high current discharge and wide ambient temperature range, it has always occupied an absolute advantage in chemical power supplies, no matter in Lead-acid batteries have played an indispensable and important role in transportation, communications, electricity, military, navigation and aviation. [0004] The main components of lead-acid batteries for power use are: positive plate, negative plate, glass fiber separator...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C11/06C22C1/02H01M4/68
CPCY02E60/10
Inventor 高根芳柏钱华陈清元张天任赵海敏佘秋利朱健朱建峰宋文龙施璐
Owner TIANNENG BATTERY GROUP
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