A capacity detection method of energy storage battery for wind-solar hybrid
A capacity detection and wind-solar complementary technology, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problems of battery power loss and scrapping, and achieve the effect of prolonging the service life
Active Publication Date: 2019-03-15
杭州瑞利超声科技有限公司
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Problems solved by technology
For batteries that have been used for a long time or are often in a state of depletion, the floating charge voltage of the battery is relatively high, but the battery is still in a state of depletion, but the control system mistakenly believes that the storage is in a state of saturation, and the system is in a charging prohibition state. state, and when the load is turned on, the battery will stop supplying power to the load in a short period of time. This kind of working condition is repeated continuously, and eventually the battery will be scrapped due to long-term power loss
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[0012] The present invention will be described in detail below in conjunction with accompanying drawing: figure 1 , 2 As shown, in this online detection method, according to the characteristics of the battery, the storage battery pack 4 charges the detection capacitor 9 with a certain initial high current. The terminal voltage curve 10 and the voltage curve 11 at both ends of the detection resistor; take the voltage U at both ends of the detection capacitor 9 C0.1 , U C0.2 The voltage U at both ends of the detection resistor 6 when reaching 10% and 20% of the rated voltage of the battery pack 4 respectively R1 , U R2 , in the case of ensuring a large enough discharge current, according to the formula The internal resistance of the storage battery pack 4 can be calculated; then the capacity of the storage battery pack 4 can be analyzed and calculated according to the correlation between the internal resistance and capacity by comparing the battery characteristic data of th...
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The invention relates to a capacitor detection method for an energy-storage storage battery for wind-solar complementation, and the online detection method comprises the steps: controlling a storage battery pack to charge a detection capacitor through a certain big initial current according to the characteristics of the battery, and recording and storing the voltage of two ends of a detection capacitor and the voltage of two ends of a detection resistor in real time in a capacitor charging process; calculating the internal resistance of the storage battery pack according to the voltage of two points in a discharge curve obtained through measurement, comparing the characteristic data of the storage batteries of a storage battery enterprise, and analyzing and calculating the capacity of the storage battery pack according to the correlation between the internal resistance and the capacity. The beneficial effects of the invention are that 1, the method can effectively monitor the real capacity of the storage battery pack, and can protect the storage battery from being short of power for a long time and thereby being discarded because of a floating charge voltage; 2, the method can effectively prolong the service life of the storage battery.
Description
technical field [0001] The invention belongs to the technical field of solar-light complementary storage batteries, and in particular relates to a method for detecting the capacity of solar-light complementary energy storage batteries. Background technique [0002] With the continuous development of renewable energy, energy storage batteries are more and more widely used in the field of renewable energy. However, the detection and protection method for the storage battery is currently only able to detect the floating charge voltage of the storage battery. This detection method is feasible for newly installed batteries. For batteries that have been used for a long time or are often in a state of depletion, the floating charge voltage of the battery is relatively high, but the battery is still in a state of depletion, but the control system mistakenly believes that the storage is in a state of saturation, and the system is in a charging prohibition state. state, and when the...
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IPC IPC(8): G01R31/389G01R31/387
CPCG01R31/36
Inventor 王泽民刘蕴博黄清龙金杭超郦元宏齐丽强陈立新
Owner 杭州瑞利超声科技有限公司