Effect of the Breakthrough of Lead Carbon Battery Technology on Energy Storage Industry

With the increasing demand of energy storage market, lead-carbon batteries with rapidly declining energy storage costs have a good prospect in the energy storage market. The lead-carbon batteries of Nandu Power, Shuangdeng Group and Shengyang Shares have begun to produce results.

First, technology upgrading promotes the reduction of energy storage costs

In recent years, domestic energy storage technology has been continuously developed, especially the lead carbon battery energy storage technology in chemical energy storage has achieved great breakthroughs and improvements. The energy storage economy brought about by the development of energy storage technology of lead-carbon battery has brought about a new turning point in energy storage industry in China. At present, domestic companies that master lead-carbon battery technology mainly include Nandu Power, Sunyang Shares and Shuangdeng Group.

Nando Power Lead Carbon Battery

Nandu Power's lead-carbon batteries mainly have the following advantages:

1, better charging and discharging reception capacity: after 100 % deep discharge, charge with 2.35 V/monomer constant pressure limit 0.15 C10(A) 10 H, the charge is more than 98 % of the discharge power.

2, overcharge over discharge temperature adaptability: the use of ambient temperature range of -40 °C ~ +60 °C.

3, short circuit resistance performance, short circuit after the test battery capacity: 8 short connection, the capacity is greater than 98 % of the initial capacity.

4, self-discharge is extremely low: after 90 days of static storage, the remaining capacity is greater than 93 %.

5, stable discharge voltage: 80 % discharge depth battery pressure drop ≤ 0.12 V/unit; Can provide higher energy density.

6, 70 % DOD life expectancy 4000 times.

In the actual operation, the running data of lead-carbon battery of Nandu Power reached the design data standard. At present, the discharge depth of the energy storage battery of the Nandu power supply is 70 %, but the battery can fully meet 80 % of the DOD operation. According to this calculation, the daily charging period is 8 hours, and the average daily charge is 10666.7 kWh; The peak discharge period is 8 hours, and the average daily discharge is 9600 kWh; The charging and discharging efficiency is 90 %. Combined with the existing peak price difference, the average daily income is about 6773.33 yuan, which is more than 70 % charged and discharged, and the income has increased by 14 %; Based on 360 days of operation per year, the annual income is approximately 2.4384 million yuan, and the income is increased by 14 %. The expected increase in revenue is mainly due to the improvement of charging and discharging efficiency. The number of charges is currently within 6,000, and there is no significant attenuation. 70 % of DODs have considered the possibility of attenuation and have not reached the limit after the future has been reduced. 80 per cent are terminations and meet international standards.

In addition, judging from the energy storage cost of lead-carbon batteries, the power supply in South China has now been reduced to less than 0.45 yuan / KWh, which has reached the lowest level of domestic lead-carbon battery energy storage costs. This has brought advantages that other companies can not surpass for the commercialization and development of power lead-carbon batteries in Nandu.

Unlike other energy storage power stations, in addition to batteries, the Battery Management System(BMS) and Process Control System(PCS) provided by the South Power Storage Power Station are a major highlight, equipped with a battery management system that can optimize the use of batteries and extend life. In the current energy storage project, if it can have an independent design and manufacturing of a full set of batteries and control systems, it can also provide customers with high-quality services and solutions, which will help the company enhance customer stickiness. In addition, the energy storage power station of Nandu Power Station adopts a centralized monitoring function, that is, the state of each part of the system is uniformly assembled on the software platform, and Humanized monitoring and management is carried out to improve the efficiency of system management. The power station itself adopts the form of a container. It can be arbitrarily combined and dismantled according to the size of the capacity, which is convenient for transportation, and the station is built quickly and the overall beauty is more beautiful.

Sunyang SHARES lead carbon batteries

In June 2014, Sunyang SHARES formally signed a technical cooperation agreement with Furukawa Battery Co., Ltd. of Japan. The two sides plan to carry out strategic cooperation on lead-acid battery products with international leading capacity, deep circulation, and ultra-long-life lead-carbon technology storage. The company's FCP lead-carbon batteries have increased the recycling life of 70 % D0D to more than 4,200 times and have a design life of 15 years. High voltage batteries(600V) can have a cycle life of more than 3,500 times in an energy storage system. In addition, with its excellent battery cycle function, the company reduced the power storage cost of energy storage batteries to 0.5 yuan/KWh, which opened up profit space for the commercialization of energy storage projects, but this cost is still slightly higher than that of the power supply in Nandu. Lead carbon battery energy storage project.

Shuangdeng Group lead-carbon batteries

According to the failure mode of the ordinary battery in the energy storage scene, Shuangdeng Group has carried out a new design of the battery's grid, diaphragm, and shell, and has specifically developed lead-carbon batteries. The main features of the company's lead-carbon batteries include:

Rechargeting capacity: Rechargeting capacity is one of the key indicators of lead-carbon batteries, and lead-carbon batteries can receive up to twice the charging capacity of ordinary lead-acid batteries.

2, PSoC cycle life is long: in the state of 30 % ~ 90 % PSOCC cycle, the double lead carbon battery has been recycled 4500 +, still 97.5 % of the rated capacity, the battery is in good condition.

3, good product consistency: for group battery system voltage detection, system battery consistency is good, group battery open pressure difference is less than 13 mV, group battery discharge, discharge terminal pressure difference is less than 61 mV.

Cost reductions due to economies of scale

Although energy storage technology has a lot of application space on the user side, at present, the market size of user-side energy storage is still small, and the size of user-side energy storage power stations is also about 10-20 MWh. Even commercial projects are generally experimental energy storage projects.

However, with the continuous development and maturity of energy storage technology, on the one hand, the total installed capacity and scale of energy storage will continue to expand, and the scale effect will be realized and the cost will decrease; On the other hand, if the scale of energy storage plants can be expanded, the cost of energy storage per unit of energy in a single power station can be reduced because the price of distribution facilities will decrease with the increase in procurement; Since the monitoring equipment is produced by the company itself, the production cost and cost can be controlled, and the possibility of sudden fluctuations is less likely. In addition, in the next process of commercialization of energy storage projects, labor costs will decrease with the introduction of remote monitoring and the application rate will continue to increase. Therefore, the impact of labor costs on the construction of energy storage projects in the future will be less and less.

The page contains the contents of the machine translation.