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Maintenance-free starting lead-acid storage battery with long service life and high specific energy, and production method thereof

A lead-acid battery, maintenance-free technology, applied in the direction of lead-acid battery, lead-acid battery electrode, lead-acid battery construction, etc., can solve problems such as cost increase, battery performance decline, capacity decline, etc., to improve life, high specific energy Effect

Pending Publication Date: 2020-08-28
CAMEL GRP HUAZHONG BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the use of lead-acid batteries, there are generally problems such as low utilization rate and insufficient charging, which lead to sulfation, resulting in decreased battery performance and short service life of lead-acid batteries.
In order to solve the above technical problems, the current solutions of manufacturers generally increase the lifespan by increasing the amount of lead paste and reducing the utilization rate of active materials. The disadvantages of the existing technical solutions are as follows: 1. The weight and weight of the battery are increased by increasing the amount of lead paste. Lead consumption, the capacity increases, but the cost will also increase; 2. Reduce the utilization rate of active substances through formula adjustment, but the capacity will decrease. If the rated capacity cannot be met, the amount of paste needs to be increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1 (the acid content and apparent density of the lead paste coated on the upper and lower parts of the positive plate grid are different, and the lead paste coated on the upper and lower parts of the negative plate grid is the same)

[0069] 1) Preparation of the first positive electrode paste

[0070] The ingredients are: short fiber 0.07%, red lead 7%, 4BS seeds 0.8%, pure water 10%, 1.38g / cm 3 The sulfuric acid solution is 8%, and the rest is lead powder.

[0071] Its preparation process is as follows:

[0072] (1) Mechanically premix red lead and 4BS seeds for 2-5 minutes, and mix well;

[0073] (2) Put the auxiliary materials mixed in step (1) together with the short fibers into the lead powder, and dry stir for 5-10 minutes;

[0074] (3) Add pure water within 5 minutes, and wet stir for 5~10 minutes;

[0075] (4) Slowly add the sulfuric acid solution to the mixture in step (3), the acid addition time is controlled within 10~20min, the temperature during...

Embodiment 2

[0100] Example 2 (the conductive substance content of the lead paste coated on the upper and lower parts of the positive plate grid is different, and the lead paste coated on the upper and lower parts of the negative plate grid is the same)

[0101] 1) Preparation of the first positive electrode paste

[0102] The ingredients are: short fiber 0.08%, red lead 8%, 4BS seeds 1.2%, pure water 9%, 1.38g / cm 3 The sulfuric acid solution is 9%, and the rest is lead powder.

[0103] Its preparation process is as follows:

[0104] (1) Mechanically premix red lead and 4BS seeds for 2-5 minutes, and mix well;

[0105] (2) Put the auxiliary materials mixed in step (1) together with the short fibers into the lead powder, and dry stir for 5-10 minutes;

[0106] (3) Quickly add pure water, wet stirring for 5~10min;

[0107] (4) Slowly add the sulfuric acid solution to the mixture in step (3), the acid addition time is controlled within 10~20min, the temperature during the process does not...

Embodiment 3

[0132] Example 3 (the lead paste coated on the upper and lower parts of the positive grid is the same, and the lead pastes coated on the upper and lower parts of the negative grid have different acid contents and different apparent densities)

[0133] 1) Preparation of positive electrode paste

[0134] The ingredients are: short fiber 0.09%, red lead 10%, 4BS seeds 1.2%, pure water 11%, 1.38g / cm 3 10% sulfuric acid solution, the rest is lead powder.

[0135] Its preparation process is as follows:

[0136] (1) Mechanically premix red lead and 4BS seeds for 2-5 minutes, and mix well;

[0137] (2) Put the auxiliary materials mixed in step (1) together with the short fibers into the lead powder, and dry stir for 5-10 minutes;

[0138] (3) Quickly add pure water, wet stirring for 5~10min;

[0139] (4) Slowly add the sulfuric acid solution to the mixture in step (3), the acid addition time is controlled within 10~20min, the temperature during the process does not exceed 65°C, af...

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Abstract

The invention relates to a long-service-life high-specific-energy maintenance-free starting lead-acid storage battery and a production method thereof. According to the battery, lead plasters coated atthe upper portion and the lower portion of a grid of at least one of a positive electrode plate and a negative electrode plate are different, and the conductivity or the utilization rate of the leadplaster at the lower portion of the grid is superior to that of the lead plaster at the upper portion of the grid. According to the invention, the upper portion and the lower portion of an electrode plate adopt different formulas and are respectively coated and filled, wherein the acid content of the lead plaster at the lower portion is different so as to reduce that the apparent density of the lead plaster or the conductive substance content of the lead plaster at the lower portion is different so as to improve the utilization rate, so that the problem of low utilization rate of the active substance at the lower portion is effectively improved, and the capacity of the battery is improved; the internal resistance of the lower portion is reduced, and the utilization rate is improved, so that the problem of high proportion of upper discharge capacity is slowed down, wherein the upper discharge capacity of the electrode plate is reduced and the discharge rate is reduced under the condition of the same discharge capacity, so that the softening and falling of the active substance are reduced, and the service life of the battery is prolonged; and under the condition of the same paste coating amount, the capacity, the low-temperature discharge performance and the cycle durability of the prepared battery are improved.

Description

technical field [0001] The invention belongs to the field of accumulators, in particular to a maintenance-free starting lead-acid accumulator with long service life and high specific energy. Background technique [0002] Lead-acid battery is mainly composed of positive plate, negative plate, separator, bus bar, electrolyte, tank cover and so on. The plate is the core component of the lead-acid battery. The performance of the plate directly affects the performance and service life of the battery, and the plate is usually composed of grids and lead paste. The main function of lead paste is to provide energy storage and output in the charging and discharging process. It is the most important active substance directly participating in the reaction, and it is a key factor affecting the performance of the battery. Lead paste is generally composed of lead powder, sulfuric acid, pure water, additives (such as short fibers, lignin), etc. After a suitable paste process, coating, curi...

Claims

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Application Information

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IPC IPC(8): H01M4/20H01M10/12H01M10/14
CPCH01M4/20H01M10/12H01M10/14Y02E60/10Y02P70/50
Inventor 高国兴史俊雷余萍庞雨雨王倩徐建刚张祖波
Owner CAMEL GRP HUAZHONG BATTERY
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