Lithium battery voltage detection method is introduced

Source: 2020 - 04 - 11 as hits: lithium battery voltage test methods abstract: this paper proposes a circuit implementation is simple, high precision, low consumption of isolated lithium battery voltage detection method. Lithium battery voltage detection method is based on the battery voltage detection principle and the technology of electromagnetic switch. Get the raw data and fitting. The advantages of data fitting method to determine the circuit. Practice has proved that this method is simple and practical, high detection accuracy, applicability is wide and has high practical value. Key words: lithium battery; Voltage detection; Mirror detection; Data fitting of lithium battery is energy than high, long life, light weight, environmental protection and other advantages, is widely used in hydraulic, heat and power generation such as wind power and solar energy storage system. The lithium battery voltage detection is an important part of the whole power energy storage system. System control signal according to the battery voltage work in the same area. At present, lithium battery voltage measurement methods mainly include mechanical relay isolation part inspection, differential amplifier isolation, voltage detecting voltage isolation, photoelectric relay isolation, etc. Because of its low precision, complex structure and so on, these methods have not been widely used. Put forward a kind of circuit implementation is simple, high precision, low consumption of isolated lithium battery voltage detection method. System design of this system adopts the battery voltage detection principle. As shown in figure 1, the original side L3 form an oscillating circuit, and the complexity of L1 and L2 rectifier output structure is symmetrical, so as to achieve the output voltage of the sampling point B relative to the point a of lithium-ion batteries. Because the detection method is based on the electromagnetic switch technology, the original signal is nonlinear, so the data fitting method to determine the advantages of the circuit. When the VCC is 12 v, oscillation frequency of 10 KHZ, coil turn ratio for 12:10:10, 0 - measurement 5 v lithium battery data as shown in table 1. In this paper, the data in 0 ~ 5 v range measurement, every 0. 1 V a measurement. This paper proposes a lithium battery voltage detection method, this method basic is better than that of 3% when the battery voltage is 1 v, basic is better than that of 1% when the battery voltage is 1 v. Detection method is simple, practical, and high precision, wide application scope.