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Electric vehicle lead-acid battery electrolyte

A lead-acid battery, electrolyte technology, applied in lead-acid battery, lead-acid battery construction, acid electrolyte and other directions, can solve the problems of battery capacity decline, poor charging receiving ability, short battery life, etc., to improve over-discharge performance , Improve the capacity and life, improve the effect of cycle life

Active Publication Date: 2017-01-11
HENAN CHAOWEI POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The following phenomena of short service life of the battery can be improved in terms of electrolyte formula: the battery loses water too quickly, and the electrolyte bulges and deforms after it dries up; the particles of lead sulfate are particularly large after the battery is deeply discharged, and lead sulfate cannot be converted into Active material; the capacity of the battery drops sharply in the low temperature season; the interface resistance between the grid and the lead paste is large, the bonding force between the lead paste and the lead paste is poor, and finally loosens and falls off; Less, it belongs to the poor charging receiving ability; the battery capacity is a bit low compared with the design capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The lead-acid battery electrolyte of the electric vehicle of this embodiment is made of the raw materials comprising the following parts by weight: 3 parts of sodium carboxymethyl cellulose, 0.8 part of succinate, 0.5 part of bismuth trioxide, 0.3 part of stannous sulfate, sulfuric acid 34 parts, 61.4 parts of water.

[0023] The sulfuric acid is concentrated sulfuric acid with a mass fraction of 97%; the water is deionized water.

[0024] Due to the small design space of the battery, in order to ensure that the amount of lead is sufficient, it is only necessary to reduce the electrolyte space, and the amount of electrolyte determines the performance of the battery; the battery is used in a high temperature environment, and the battery loses water quickly. The electrolyte solution in this embodiment is suitable for reducing water loss in the battery.

Embodiment 2

[0026] The lead-acid battery electrolyte of the electric vehicle of this embodiment is made of the raw materials comprising the following parts by weight: 2 parts of sodium carboxymethyl cellulose, 2 parts of succinate, 0.4 part of bismuth trioxide, 0.3 part of stannous sulfate, sulfuric acid 33 parts, 62.3 parts of water.

[0027] The sulfuric acid is concentrated sulfuric acid with a mass fraction of 98%, Fe content≤0.0005wt%, Cl content≤0.0005wt%; the water is deionized water, and its conductivity is≤5μS / cm.

[0028] The battery is used for a long time under the condition of over-discharge, and the charging is not timely, which is easy to generate large particles of lead sulfate; the negative plate of the battery is easy to over-discharge and generate a large amount of lead sulfate when used in a low-temperature environment, and it is not easy to convert into active substances during charging. The electrolyte of this embodiment should be used for the above phenomena, becaus...

Embodiment 3

[0030] The lead-acid battery electrolyte of the electric vehicle of this embodiment is made from the raw materials that comprise the following parts by weight: 2.5 parts of sodium carboxymethyl cellulose, 1 part of succinate, 0.8 part of bismuth trioxide, 0.4 part of stannous sulfate, sulfuric acid 35 parts, 60.3 parts of water.

[0031] The sulfuric acid is concentrated sulfuric acid with a mass fraction of 99%, Fe content≤0.0005wt%, and Cl content≤0.0005wt%; the water is deionized water with a conductivity≤5μS / cm.

[0032] Poor solidification of the plate, easy separation of the lead paste and the grid; the early capacity decay of the battery is fast, and the interface resistance between the grid and the lead paste is large; the dissection of the battery is the phenomenon of loose and falling off living things; the battery will be damaged if the battery is charged or discharged at a high current for a long time. The bonding force between the lead paste and the grid is gettin...

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Abstract

The invention belongs to the technical field of accumulators, and in particular relates to an electrolytic solution for lead-acid accumulators of electric vehicles. The electrolytic solution of the lead-acid battery of the electric vehicle of the present invention is made of the raw materials comprising the following parts by weight: 2-3 parts of sodium carboxymethylcellulose, 0.5-2 parts of succinate, 0.1-0.8 parts of bismuth trioxide, stannous sulfate 0.3-0.7 parts, 32-36 parts of sulfuric acid, 58-65 parts of water. The electrolytic solution of the invention can avoid the early capacity attenuation of the lead-acid battery of the electric vehicle, reduce the water loss in the cycle process, hinder the generation of large-particle lead sulfate, and improve the battery capacity and service life.

Description

technical field [0001] The invention belongs to the technical field of accumulators, and in particular relates to an electrolytic solution for lead-acid accumulators of electric vehicles. Background technique [0002] The following phenomena of short service life of the battery can be improved in terms of electrolyte formula: the battery loses water too quickly, and the electrolyte bulges and deforms after it dries up; the particles of lead sulfate are particularly large after the battery is deeply discharged, and lead sulfate cannot be converted into Active material; the capacity of the battery drops sharply in the low temperature season; the interface resistance between the grid and the lead paste is large, the bonding force between the lead paste and the lead paste is poor, and finally loosens and falls off; Less, it belongs to the poor charging receiving ability; the battery capacity is a bit low compared with the design capacity. Contents of the invention [0003] In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/08H01M10/12
CPCH01M10/08H01M2300/0011Y02E60/10Y02P70/50
Inventor 李松林柴成雷
Owner HENAN CHAOWEI POWER SUPPLY
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