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Lead storage battery formation method

A chemical formation method and technology for lead-acid batteries, applied in the direction of lead-acid batteries, lead-acid battery construction, secondary batteries, etc., can solve the problems of short battery life and low α-PbO2 content, and achieve extended life, rapid formation, and increased content Effect

Active Publication Date: 2020-09-18
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to: when adopting battery formation, a kind of improving α-PbO 2 Method, to solve the α-PbO caused by battery formation in the prior art 2 The problem of low content and short battery life, in order to achieve the above purpose, the present invention adopts the following technical solutions:

Method used

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  • Lead storage battery formation method

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Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation of sodium sulfate aqueous solution

[0023] Prepare an aqueous solution with a mass concentration of sodium sulfate of 0.4%.

[0024] 2. Initial formation

[0025] Prepare the 20Ah battery with the assembled raw board, add the prepared aqueous solution containing sodium sulfate to the battery, add 1.2 times the volume of saturated liquid absorption, put the battery in a vacuum box after the addition, and connect the power cord to the battery Formation, the vacuum degree is controlled at -0.08MPa (the reading on the vacuum pressure gauge refers to the pressure smaller than the atmospheric pressure when the atmospheric pressure is taken as the reference, and the negative value indicates the vacuum degree), the formation current is controlled at 1.5C, and the formation time is 2h, so , the formation temperature can be precisely controlled at 60°C, and it is easy to form α-PbO under the initial alkaline condition 2 .

[0026] 3. The second step of formatio...

Embodiment 2

[0031] 1. Preparation of sodium sulfate aqueous solution

[0032] Prepare an aqueous solution with a mass concentration of sodium sulfate of 0.4%.

[0033] 2. Initial formation

[0034] Prepare the 20Ah battery with the assembled raw board, add the prepared aqueous solution containing sodium sulfate to the battery, the volume added is 1.4 times the saturated liquid absorption capacity, after adding, put the battery in a vacuum box, and connect the power cord Carry out battery formation, the vacuum degree is controlled at -0.08MPa (the reading on the vacuum pressure gauge refers to the pressure less than the atmospheric pressure when the atmospheric pressure is taken as the reference, and the negative value indicates the vacuum degree), the formation current is controlled at 1.0C, and the formation time is 3h , so that the formation temperature can be precisely controlled at 60°C, and it is easy to form α-PbO under the initial alkaline condition. 2 .

[0035] 3. The second s...

Embodiment 3

[0040] 1. Preparation of sodium sulfate aqueous solution

[0041] Prepare an aqueous solution with a mass concentration of sodium sulfate of 0.4%.

[0042] 2. Initial formation

[0043] Prepare the 20Ah battery with the assembled raw board, add the prepared aqueous solution containing sodium sulfate to the battery, the volume added is 1.4 times the saturated liquid absorption capacity, after adding, put the battery in a vacuum box, and connect the power cord For battery formation, the vacuum degree is controlled at -0.089MPa (the reading on the vacuum pressure gauge refers to the pressure less than the atmospheric pressure when the atmospheric pressure is taken as the reference, and the negative value indicates the vacuum degree), the formation current is controlled at 1.5C, and the formation time is 2h , so that the formation temperature can be precisely controlled at 50°C, and it is easy to form α-PbO under the initial alkaline condition. 2 .

[0044] 3. The second step o...

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Abstract

The invention discloses a lead storage battery formation method which comprises the following steps: (1) adding a sulfate aqueous solution which is 1.1-1.4 times of saturated liquid absorption and hasthe mass concentration of 0.4-0.8% into a battery, then carrying out first-stage formation, and controlling the boiling point of water to be 50-60 DEG C by vacuumizing the interior of the battery; and (2) adding 1.2-1.8 times of sulfuric acid solution with saturated liquid absorption capacity and density of 1.19-1.25 g / ml into the battery, then carrying out second-stage formation, and controllingthe boiling point of water to be 40-50 DEG C by vacuumizing the interior of the battery. According to the method, the sulfate-containing aqueous solution is firstly added, the temperature rise of thebattery is avoided, the alkaline condition maintaining time of formation is obviously prolonged, the formation temperature is controlled to be 50-60 DEG C through the vacuum degree, high current canbe adopted for rapid formation, formation conditions beneficial to alpha-PbO2 are created, and the content of alpha-PbO2 is increased. Then, a sulfuric acid solution with a certain concentration is added in the second stage, battery formation is continued under the condition of a certain vacuum degree, and rapid formation can be realized. After the battery is formed, the content of alpha-PbO2 is increased, and the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of lead storage batteries, in particular to a method for forming lead storage batteries. Background technique [0002] In the production process of lead-acid batteries, the batteries need to be formed. When the battery is formed, due to the high density of the electrolyte used, the temperature rises when the acid is added. Generally, a small current is used for the formation, and the formation time is long. After the formation, the positive electrode α-PbO 2 If the content is small, the life of the battery will be significantly shortened. [0003] For example, the invention with the publication number CN105186055A discloses a method for internally forming a lead-acid storage battery, and the following steps are carried out in sequence: step (a): charge with 0.03C2~0.06C2 for 0.2-0.5 hours; then charge with 0.12C2~0.16C2 0.2-0.5 hours; step (b): cycle charge and discharge with degraded electrode: transfer t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44H01M10/12
CPCH01M10/12H01M10/446Y02E60/10Y02P70/50
Inventor 郭志刚李海彪沈菲许宝云李桂发洪清富宋文龙
Owner TIANNENG BATTERY GROUP
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