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Low-temperature-resisting storage battery electrolyte and preparation method thereof

A storage battery and low-temperature-resistant technology, applied in lead-acid batteries, acid electrolytes, aqueous electrolytes, etc., can solve the problems of poor low-temperature performance and short service life of batteries, prevent crystallization, avoid sulfation, and improve low-temperature performance and life Effect

Active Publication Date: 2018-07-27
浙江天能汽车电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a low-temperature-resistant battery electrolyte to solve the problems of poor low-temperature performance of the battery and short service life caused by sulfation of the plates in the prior art

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  • Low-temperature-resisting storage battery electrolyte and preparation method thereof

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Effect test

Embodiment 1

[0042] 1. Battery electrolyte formula: pure water (conductivity less than 0.3μS / cm) 63kg, sulfuric acid (analytical pure) 32kg, tannin (for battery) 0.3kg, magnesium lignosulfonate 0.2kg, lithium sulfite 0.08kg, Stannous sulfate 0.06kg, polyepoxysuccinic acid 4kg, hydroxymethylcellulose 0.7kg.

[0043] 2. Preparation method

[0044] (1) Heat 6.4kg of formula water, keep it at 80°C, then add tannin, stir at 400r / min for 30 minutes to ensure that the tannin is evenly mixed in the water, lower the temperature of the solution to 60°C, and then add lignosulfonic acid Magnesium was stirred at a speed of 200r / min for 20 minutes to ensure that the magnesium lignosulfonate was evenly mixed in the solution, and left to stand at room temperature for use.

[0045] (2) Heat 20% of the formula water, keep it at 50°C, then add polyepoxysuccinic acid, stir at a speed of 200r / min for 20 minutes, ensure that the polyepoxysuccinic acid is evenly mixed in the solution, keep the temperature and t...

Embodiment 2

[0048] 1. Battery electrolyte formula: pure water (conductivity less than 0.3μS / cm) 66kg, sulfuric acid (analytical pure) 34kg, tannin (for battery) 0.4kg, magnesium lignosulfonate 0.15kg, lithium sulfite 0.07kg, Stannous sulfate 0.08kg, polyepoxysuccinic acid 6kg, hydroxymethylcellulose 0.2kg.

[0049] 2. Preparation method

[0050] (1) Heat 6.4kg of formula water, keep it at 90°C, then add tannin, stir at a speed of 300r / min for 20 minutes to ensure that the tannin is evenly mixed in the water, lower the temperature of the solution to 70°C, and then add lignosulfonic acid Magnesium was stirred at a speed of 100 r / min for 10 minutes to ensure that the magnesium lignosulfonate was evenly mixed in the solution, and left to stand at room temperature for use.

[0051] (2) Heat 20% of the formula water, keep it at 60°C, then add polyepoxysuccinic acid, stir at a speed of 100r / min for 10 minutes, ensure that the polyepoxysuccinic acid is evenly mixed in the solution, keep the temp...

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Abstract

The invention discloses low-temperature-resisting storage battery electrolyte and a preparation method thereof and belongs to the technical field of manufacturing of storage batteries. The storage battery electrolyte is prepared from the following components in percentage by mass: 60 to 65 percent of water, 30 to 35 percent of sulfuric acid, 0.1 to 0.5 percent of tannin, 0.05 to 0.3 percent of magnesium lignosulphonate, 0.02 to 0.1 percent of lithium sulfite, 0.02 to 0.1 percent of stannous sulfate, 3 to 10 percent of polyepoxysuccinic acid or sodium polyepoxysuccinate and 0.05 to 0.3 percentof hydroxymethyl cellulose. According to the electrolyte disclosed by the invention, a polar plate sulfated new component, i.e., polyepoxysuccinic acid or sodium polyepoxysuccinate, is added into theelectrolyte to alleviate the utilization invalidation of lignin components in a negative electrode additive, so that the service life of a storage battery is prolonged; meanwhile, the low-temperatureperformance of the storage battery is increased; the special tannin for the storage battery is added into the storage battery in an another way, so that the low-temperature performance of the storagebattery is improved; magnesium lignosulphonate and metal salt components are added to avoid short circuit of storage battery dendritic crystal and prevent a polar plate from being sulfated.

Description

technical field [0001] The invention relates to the technical field of battery manufacturing, in particular to a low-temperature-resistant battery electrolyte and a preparation method thereof. Background technique [0002] In most cases, the lead-acid battery cannot reach the expected service life. The main problem is the early decay and failure of the capacity. One of the main reasons affecting the life of the lead-acid battery is: the sulfation of the plate, that is, the formation of white hard particles on the plate. Lead sulfate crystallizes, and it is very difficult to convert it into an active substance when charging, which is called "sulfation" for short. To put it simply, the plate of the lead-acid battery is covered by lead sulfate crystals, resulting in a decrease in battery capacity or a decline in function. [0003] The reason for the formation of this kind of lead sulfate is that after over-discharge or long-term storage after discharge, the lead sulfate partic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/08
CPCH01M10/08H01M2300/0011Y02E60/10
Inventor 程艳青熊正林方明学陆辉刘海凤
Owner 浙江天能汽车电池有限公司
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