Substation lead-acid battery maintenance "boss is difficult" problem

Mwandishi:Iflowpower- Leverandør av bærbar kraftstasjon

Battery Rehabilitation Regeneration The second application of exceeding 95% $ Notiod Recreation The second application of the scrapped battery is not a dream. As an important part of the electricity system, the operation and maintenance of the substation is related to the important and responsibility of its operation and maintenance. Desolate.

However, during the daily operation and maintenance, the operation and maintenance personnel have found that the valve-controlled lead-acid battery (hereinafter referred to as "battery" in recent years is difficult to achieve the design life, such as the battery's design life is 10 ~ 12. In the year, most of the battery actual life is only 6-8 years. In recent years, the transmission and maintenance personnel of the substation have tried to use innovative technical means to decompose the sulfate product of sulfate-producing product by supplementing the lead-acid battery repair liquid, and the repair of regeneration has exceeded 95%, which improves the utilization efficiency of resources, and reduces The emergence of pollution achieves regenerative use of waste lead-acid batteries.

Challenge: The battery replacement cycle has caused economic losses and environmental pollution. Power schedule, reserve power supply. According to Zhou Zhe, from the Guangzhou Power Network Guangzhou Power Supply Bureau, Zhou Zhe, the battery of the DC system technology research, put into the power storage battery, 3 to 5 years, its capacity is lower than the national requirements of 80% Require.

At the same time, the current power grid's management strategy is also allowed to make battery maintenance personnel in the face of huge pressure: On the one hand, the battery does not meet the design life, and cannot easily replace the new battery; second, even if the new battery is allowed, the entire approval process is relatively long. In the approval period, the battery is sick, which seriously affects the safety of the DC system, and also affects the reliable operation of the grid. "During use, due to the volatilization of the electrolyte, the negative electrode vulcanization, the positive electrode plate gate is softened, thermal out of control, diaphragm failure, self-discharge, etc.

, causing the battery to fail in advance, and the service life is shortened. Zhou Zhe said that due to the failure of the battery in advance, the battery replacement cycle is shortened, causing huge economic losses. At the same time, due to the lead concentrate content of more than 70%, sulfuric acid and suspension of the lead compound in the lead-acid battery, which belongs to the dangerous solid waste, and the environmental idea.

It can be seen that if these batteries can be repaired, they can reduce the damage of the waste battery to the environment, and save a lot of natural resources and energy, and can bring huge economic benefits to the company. Therefore, battery repair regeneration technology has very important economic benefits and social significance. Innovation: Supplementary repair solution decomposes the lead crystal battery capacity to restore more than 95%, however, battery repair regeneration is not an easy thing.

"The common pulse restoration method, multi-spectrum resulcual repair, etc. "Zhou Zhe recalls, in 2014, a new battery renewable repair technology changed his cognition. He introduced that the technique can decompose sulfate cell sulfate crystals by supplementing the lead-acid battery repair liquid.

The degradation of lead crystals of sulfate is to decompose metal lead, lead-neutral active substances, so that these substances restore chemical reaction substances of batteries. This reduces the internal resistance of the battery, and effectively prevents the crystal from being further formed again, and realizes the battery repair and reproduction. Compared with the traditional pulse repair, the repair technology of the lead-acid battery repair liquid repair technology is greatly reduced to the damage to the battery body.

"The battery sulfate is inexplicler, but after this, the battery can be repaired as long as its physical structure does not change severe damage. "Zhou Zhe explained, after adding the lead-acid battery repairing liquid to repair the value, use the intelligent repair equipment to apply a safe voltage and repair the battery to the battery, promote the decomposition of lead-soluble sulfate transistor And reducing the lead and the neutral active material returning to the electrolyte, thereby achieving the negative electrode plate void, promotes the sufficient contact of the electrolyte and plate active substance, and restores the capacity of lead-acid battery capacity. After the test.

In terms of life, the battery is repaired by high temperature aging test, and the battery after repairing the repair technology can reach more than 3 years. According to Zhou Zhe, the addition of the lead-acid battery repair liquid has no corrosive, there is no impact on the inside of the battery, and it will not cause the battery to open, and the safety is obvious. At present, the first group of repaired batches after the Guangzhou Power Supply Bureau has been re-put into use in the substation in September last year.

It has been 14 months old, and the operation is good. It is reported that the battery regeneration and repair promotion work is also carried out at the Shenzhen Power Supply Bureau. At the beginning of this year, the battery repair regeneration studies have been formally established in the bureau.

So far, the battery has been repaired, and the capacity is restored to more than 95% of the rated capacity. It has been put into the substation operation. The bureau is engaged in the Substation DC System Technology Research Work, and the Shenzhen Power Supply Bureau Substation is currently about 480 groups of battery batteries.

If the service life is 8 years, it will replace 60 sets of batteries averaged a year, but If the battery can be used for 12 years by scientific repair, then only 40 sets of battery will be replaced, which can be $ 1.8 million for the company's annual festival. Prospect: Strengthening the full life cycle management to realize the scrap battery secondary application, the lead-acid battery repair technology not only solves the big problems in the maintenance staff of the substation, but also supplies scientific means for the full life cycle management of the battery.

Ji Zhe Fu introduced that in the power industry, the existing equipment with low assets and secondary equipment and other high-life cycle costs have less research, more high-voltage, high-voltage, high voltage, relatively high-volume. In fact, the annual cost of use after the battery depreciation calculation of the substation DC system is not low, and the existing management strategy is not perfect, and it is urgent to conduct a full life cycle cost study, establish the operation and maintenance of the substation battery pack, repair Utilize the best way to manage the system of retirement scrap, thereby improving the company's comprehensive economic benefits. To this end, Ji Zhe Fu and team members have tested hundreds of batteries.

After analyzing data, the current economic benefits are the highest operation mode, that is, after the battery capacity is reduced to 70%, the repair liquid is used for secondary light. Degree repair. "Those lead-acid batteries that are aborted in the power system, after complementing the scientific lead-acid battery repair technology, can be used to large knife, home energy storage, energy storage power station, thereby achieving the two lead-acid batteries Application, extend its life, reduce the amount of use of lead-acid battery, reduce such battery's environmental pollution.

"Ji Zhefu believes that the development of energy storage can alleviate the problem of peak electrical and powerless, low peak electrical no one, greatly enhance the value of the power system, more convenient for the company, household electricity, and the development of the grid. .