Communication room and other . If the battery failure lack of capacity, it possible to cause a accident, it is necessary conduct a comprehensive online of the operating parameters the special battery. One the important signs of method is its battery . Whether it is the failure coming, insufficient capacity improper charge discharge, can reflected from the change the battery's internal resistance. , by measuring the internal of the battery can to assess the of their work. The of measuring the internal of battery has the special:
(1) density method
Density method mainly through measurement of electrolyte density estimate the battery's internal , internal resistance measurement commonly in open type lead-acid , not suitable for measuring resistance of lead-acid battery. scope of application of method is narrow.
(2) open circuit voltage
The open circuit voltage is to estimate the of the battery by battery terminal voltage measurement, accuracy is poor, even wrong conclusion. Because even a battery capacity has very small, then the state of terminal voltage still likely to be .
(3) DC discharge
DC discharge is through large current discharge of battery, the battery on measurement of instantaneous voltage , calculated by the ohm resistance of the battery. this method has been used in practice, but also has some shortcomings. internal resistance of the must be tested in or is offline if this method, can realize measurement. And large current will cause a great to the battery, thereby the capacity and life the battery.
(4) AC injection method
By the method of AC current signal of battery into a constant, measured battery voltage at ends of the response of Vo, and the difference from the impedance to determine the battery's resistance R. This method not need to discharge battery, can realize online of battery internal resistance safety, so it will affect the performance of battery. But this method measurement of AC current voltage response Is signal, signal, and the phase between voltage and current, this method is not more interference factors, but increases the complexity of system, but also affect measurement accuracy. In order solve the defects of method, this paper adopts terminal measurement method, the voltage on both ends the response signal through communication circuit and differential signal generating a constant source after the analog multiply the analog output multiplier signal through the circuit, the AC signal a DC signal, DC the DC amplifier analog-to-digital , the converted value into SCM process.
(5) resistance tester
Internal resistance tester is to measure the internal of battery and battery film damage degree of instrument, hereinafter referred to the instrument. It is to 1KHz AC signal the measured object, and the resistance by measuring AC voltage drop. (principle, is different from the to measure the resistance the measured value is level, while the multimeter is Ohm level; and multimeter can only measure object without power resistance, resistance instrument can measure object without power resistance, also can measure the of object resistance, so may not be equal) state to determine the of the internal resistance the battery using resistance, () the better the performance the battery resistance is . Therefore, the method of the internal resistance of detection is a good with fast speed and reliability.
- FIAMM ASIA PACIFIC
- 21 Toh Guan Road East,
- #09-08 Toh Guan Centre,
- 608609 SINGAPORE
- Tel: +65 6867 6155
- Fax: +65 68626558
- Email: [email protected]
Industry new Your position: Home > Industry new
Resistance method of precise of special battery.
2023-11-11
PREVIOUS： Italy special storage battery perfor
NEXT： FLB battery and battery new