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A kind of lead accumulator that overcomes early capacity fading and preparation method thereof

A lead-acid battery and capacity decay technology, applied in the field of lead-acid battery and its preparation for overcoming the early capacity decay of lead-calcium alloy batteries, can solve the problems of easy decay of early capacity and the like, and achieve maintenance-free, no increase in water loss rate, good capacity performance effect

Active Publication Date: 2021-02-19
TIANNENG BATTERY GROUP
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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 preparation method of a lead-acid storage battery that overcomes early capacity attenuation, to solve the problem that the early capacity is easy to attenuate due to the preferential discharge of the grid corrosion layer in the prior art lead-calcium alloy battery

Method used

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  • A kind of lead accumulator that overcomes early capacity fading and preparation method thereof
  • A kind of lead accumulator that overcomes early capacity fading and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] 1. Preparation of transition layer paste

[0037] Add 100Kg of lead powder, 70g of fiber and 1Kg of Sb to a common paste machine 2 o 3 , dry mix for 5 minutes, add 18Kg of water, stir for 5 minutes after adding water, then add 9.6Kg of 1.4 sulfuric acid, control the speed of acid addition, finish adding within 15 minutes, and stir for 3 minutes after adding acid to form Sb 2 o 3 A paste with a content of about 0.8% and an apparent specific gravity of 3.7.

[0038] 2. Formation of transition layer

[0039] The lead-calcium alloy grid of the 20Ah battery is immersed in the paste for 5 minutes, and the surface of the grid is coated with a brush, and the weight of the paste is controlled to be 10% of the total amount of the paste.

[0040] 3. Production of positive electrode paste

[0041] Add 100Kg of lead powder, 70g of fiber and 0.1Kg of Sb to a common paste machine 2 o 3 and 0.1Kg of SnSO 4 , dry mix for 5 minutes, add 12Kg of water, add water for 5 minutes, the...

Embodiment 2

[0051] 1. Preparation of transition layer paste

[0052] Add 100Kg of lead powder, 70g of fiber and 1Kg of Sb to a common paste machine 2 o 3 , dry mix for 5 minutes, add 18Kg of water, stir for 5 minutes after adding water, then add 9.6Kg of 1.4 sulfuric acid, control the speed of acid addition, finish adding within 15 minutes, and stir for 3 minutes after adding acid to form Sb 2 o 3 A paste with a content of about 0.8% and an apparent specific gravity of 3.7.

[0053] 2. Formation of transition layer

[0054] The lead-calcium alloy grid of the 20Ah battery is immersed in the paste for 5 minutes, and the surface of the grid is coated with a brush, and the content of the paste is controlled at 10% of the total amount of paste.

[0055] 3. Production of positive electrode paste

[0056] Add 100Kg of lead powder, 70g of fiber and 0.1Kg of Sb to a common paste machine 2 o 3 and 0.1Kg of SnSO 4 , dry mix for 5 minutes, add 12Kg of water, add water for 5 minutes, then add ...

Embodiment 3

[0066] 1. Preparation of transition layer paste

[0067] Add 100Kg of lead powder, 70g of fiber and 1Kg of Sb to a common paste machine 2 o 3 , dry mix for 5 minutes, add 18Kg of water, stir for 5 minutes after adding water, then add 9.6Kg of 1.4 sulfuric acid, control the speed of acid addition, finish adding within 15 minutes, and stir for 3 minutes after adding acid to form Sb 2 o 3 A paste with a content of about 0.8% and an apparent specific gravity of 3.7.

[0068] 2. Formation of transition layer

[0069] Immerse the lead-calcium alloy grid of a 20Ah battery in the paste for 5 minutes, and use a brush to coat the surface of the grid, and control the weight of the paste to 5% of the total amount of the paste .

[0070] 3. Production of positive electrode paste

[0071] Add 100Kg of lead powder, 70g of fiber and 0.1Kg of Sb to a common paste machine 2 o 3 and 0.1Kg of SnSO 4 , dry mix for 5 minutes, add 12Kg of water, add water for 5 minutes, then add 10Kg of 1.4...

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Abstract

The invention discloses a lead accumulator for overcoming early capacity attenuation of lead-calcium alloy batteries and a preparation method thereof, belonging to the technical field of accumulators. The preparation method comprises: (1) dry mixing antimony trioxide or antimony pentoxide, fiber and lead powder, adding water for wet mixing, adding sulfuric acid solution to form a paste with a specific gravity of 3-3.8; (2) Immersing the lead-calcium alloy grid in the paste, wrapping the paste on its surface to form a transition layer; (3) coating the lead paste on the grid with the transition layer to obtain a green electrode plate; (4 ) curing under the condition of no more than 55° C. to obtain the positive plate; (5) assembling the battery, adding electrolyte, and internalizing to obtain the lead storage battery. In the present invention, a transition layer with high content of antimony is formed on the surface of the lead-calcium alloy grid in advance, and the antimony-containing corrosion layer is more difficult to discharge than the active material, so that the grid-active material interface cannot form a passivation layer, effectively overcoming the early stage of the battery. capacity decay.

Description

technical field [0001] The invention relates to the technical field of accumulators, in particular to a lead accumulator for overcoming early capacity attenuation of lead-calcium alloy batteries and a preparation method thereof. Background technique [0002] Valve-regulated batteries have become the mainstream of lead-acid batteries, using lead-calcium alloys with low self-discharge, high-purity lead powder materials and sulfuric acid electrolytes to reduce battery dehydration, while using one-way valves to achieve oxygen circulation and reduce battery charging and battery life. The loss of water during the placement process achieves the purpose of maintenance-free during the entire life of the battery. [0003] After using the lead-calcium alloy, the battery is prone to early capacity fading in the case of deep cycle. The main reason is the corrosion layer formed at the interface between the positive grid and the active material using the lead-calcium alloy, because the ant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/06H01M10/12H01M4/48H01M4/56
CPCH01M4/48H01M4/56H01M10/06H01M10/12Y02E60/10Y02P70/50
Inventor 郭志刚张峰博李桂发邓成智刘玉李亚
Owner TIANNENG BATTERY GROUP
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