At this time, the pitch backup power supply of the wind turbine generator plays a crucial role. To ensure the start-up and operation of the feathering motor, the battery pack must be able to provide sufficient voltage and current, thus requiring the battery to have good rate performance, especially under harsh low-temperature conditions, which will place even higher demands on battery performance. Zhongcheng's excellent pitch system energy storage products have already gained a strong reputation in the industry; this issue introduces its lithium batteries and supercapacitors.
Zhongcheng Excellent Lithium Battery
Question 1: What is the difference between lithium batteries for wind power and commercial lithium batteries?
A: The pitch backup power supply for wind turbine generators provides power when the generator stops working, allowing the blades to feather. The total amount of electrical energy required is not large, but to ensure the starting and operation of the feathering motor, the battery pack must be able to provide sufficient voltage and current. Therefore, the battery must have good rate performance, especially in harsh low-temperature conditions, which will place even higher demands on battery performance. Commercial lithium batteries, especially those used in electric vehicles, are used in environments less harsh than wind power.
Question 2: Why replace lead-acid batteries with lithium batteries?
A: The traditional lead-acid batteries, which are the mainstream backup power source for pitch control systems, have many failures and short lifespans, which seriously affect the efficiency of wind turbines. Currently, they have been largely replaced by lithium batteries and supercapacitors. Compared with lead-acid batteries, lithium batteries have the following advantages: high energy density, long lifespan, small size, light weight, high output voltage, good safety cycle performance, low self-discharge rate, allow for fast charging and discharging, high charging efficiency, and are green and pollution-free.
Question 3: What are the characteristics of Zhongcheng Zhuoyue lithium batteries?
A: Advantages of Zhongcheng Excellent Lithium Batteries:
1. Thermal management.
It features 8 channels for voltage and temperature acquisition, ensuring the normal operation of each module. Simultaneously, it monitors the voltage of each string in real time, promptly balancing the voltage if it exceeds the range to guarantee battery consistency; the heating consistency control accuracy is ±5%.
2. It has comprehensive battery management functions.
It features overcharge, over-discharge, and over-temperature protection, along with alarm functions, effectively preventing the battery from exceeding its specifications and extending its lifespan.
3. All components are selected from top international brands and have been widely used in wind turbines.
4. Customizable communication with multiple interfaces: CANopen, serial port, dry contact, etc.
Question 4: What are the differences between Zhongcheng Zhuoyue lithium batteries and supercapacitors?
A: The differences between lithium batteries and supercapacitors are as follows:
Zhongcheng Excellent Supercapacitor
Question 5: What is the application status of Zhongcheng Excellence's energy storage products?
A: Zhongcheng Zhuoyue lithium batteries can directly replace imported products: the size, interface, and performance are completely identical; we have optimized and solved many problems encountered in the use of imported products, and we are a major supplier of lithium batteries for the wind power industry.
Since 2014, Shenzhen Zhongcheng Excellence has been providing energy storage lithium battery module products for backup power of wind turbines. The total number of lithium batteries and supercapacitors supplied has exceeded 50,000, serving as backup power for more than 2,500 wind turbines.
