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Electromobile lead acid storage battery electrolyte

A lead-acid battery and electrolyte technology, used in lead-acid batteries, lead-acid battery construction, electric vehicles, etc., can solve the problems of battery capacity decline, loose shedding, short battery life, etc. Effects of improved discharge performance and improved cycle life

Active Publication Date: 2014-03-26
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 electrolyte of the lead-acid battery for the electric vehicle of this embodiment is made of raw materials including the following parts by weight: 3 parts of sodium carboxymethyl cellulose, 0.8 parts of succinate, 0.5 parts of bismuth trioxide, 0.3 parts 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] Because the battery design space is small, in order to ensure sufficient lead content, the only way to reduce the electrolyte space, and the amount of electrolyte determines the battery performance; the battery is used in a high temperature environment, and the battery loses water quickly. The electrolyte of this embodiment is suitable for reducing battery loss.

Embodiment 2

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

[0027] The sulfuric acid is concentrated sulfuric acid, the mass fraction is 98%, the Fe content is less than or equal to 0.0005 wt%, and the Cl content is less than or equal to 0.0005 wt%; the water is deionized water, and its conductivity is less than or equal to 5 μS / cm.

[0028] The battery is used for a long time under the condition of over-discharge, and the charge is not timely, it is easy to generate large particles of lead sulfate; when the battery is used in a low temperature environment, the negative plate is easy to over-discharge and generate a large amount of lead sulfate, which is not easily converted into active material during charging. ...

Embodiment 3

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

[0031] The sulfuric acid is concentrated sulfuric acid, the mass fraction is 99%, the Fe content is less than or equal to 0.0005 wt%, and the Cl content is less than or equal to 0.0005 wt%; the water is deionized water, and its conductivity is less than or equal to 5 μS / cm.

[0032] Poor solidification of the plate, the lead paste and the grid are easy to separate; the battery capacity at the early stage decays quickly, which belongs to the large interface resistance between the grid and the lead paste; the battery anatomy is a phenomenon of loose living things; the battery will be caused by long-term high current rapid charging or discharging The bond...

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Abstract

The invention relates to the technical field of storage batteries, and particularly relates to an electromobile lead acid storage battery electrolyte. The electrolyte is prepared from following raw materials by weight: 2-3 parts of sodium carboxymethylcellulose, 0.5-2 parts of a succinate, 0.1-0.8 part of bismuth oxide, 0.3-0.7 part of stannous sulfate, 32-36 parts of sulfuric acid and 58-65 parts of water. The electrolyte is capable of avoiding capacity fading in the early stage of the electromobile lead acid storage battery, reducing the water loss in the cycle process, inhibiting generation of large-granule lead sulphate, increasing the battery capacity and prolonging the service lifetime of the battery.

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 Applications(China)
IPC IPC(8): H01M10/08H01M10/12
CPCY02E60/126Y02T10/7016H01M10/08H01M2300/0011Y02E60/10Y02P70/50
Inventor 李松林柴成雷
Owner HENAN CHAOWEI POWER SUPPLY
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