电池内阻及测量方法(国外英文资料).docVIP

电池内阻及测量方法(国外英文资料) Central issue: The internal resistance of the battery is not a fixed value Measuring method for internal resistance of batteries Solution： DC discharge internal resistance measurement AC pressure drop internal resistance measurement Different types of batteries have different internal resistances. The same type of battery, due to the internal chemical properties of inconsistencies, the internal resistance is not the same. The internal resistance of a cell is very small. We usually define it in a European unit. Internal resistance is an important technical index to measure the performance of a battery. Under normal circumstances, the small resistance of the battery discharge capacity of large current, internal resistance of the battery discharge capacity is weak. This paper mainly introduces the difficulty of internal resistance measurement and the method of measuring battery internal resistance. In the schematic of the discharge circuit, we can take the battery and internal resistance into consideration, divided into a no internal resistance power, connected to a very small resistance. If the external load is light, then the voltage distribution in the small resistance is small, if the external load is very heavy, so the voltage distribution in the resistance is relatively large, there will be a part of the power consumed in the resistance (may be converted to heat, or some complex reverse the electrochemical reaction). The internal resistance of a rechargeable battery factory is relatively small, but after long-term use, due to the internal electrolyte battery depletion, and decrease the cell internal chemical activity, the resistance will increase gradually, until the resistance inside the battery to power cannot be released at this time will come to an end of the battery. Most of the aging batteries are useless because of excessive internal resistance, so they have to be scrapped. Therefore, we should pay more attention to the capacity of the b