Brief introduction of Ni-MH battery performance indicators

Rated capacity of Ni-MH battery: refers to the amount of electricity released when the battery is discharged to the final voltage under certain discharge conditions; IEC standards stipulate that MH-Ni batteries are charged at 0.1C for 16 hours and discharged at 0.2C under an environment of 20±5°C The amount of electricity released when it reaches 1.0V is the rated capacity of the battery. Ni-MH battery rechargeable Ni-MH battery rate: refers to the battery based on the current under 1 unit of rated capacity, when a certain current is used for charging or discharging, the corresponding current ratio, we call this current XC; For example: AA2000mAh battery, the current of 1 unit of rated capacity is 2000mA, when 400mA, 2000mA, 4000mA is used for charging or discharging, the corresponding current ratio is 0.2, 1, 2, we call this current 0.2C , 1C, 2C. The internal resistance performance of the Ni-MH battery: refers to the internal resistance encountered by the battery when the Ni-MH battery is charged and discharged; the internal resistance of the battery includes the ohmic internal resistance and the polarization resistance; the ohmic internal resistance is the electronic conductivity resistance of each component , Ionic conductivity resistance and contact resistance are related to the electrode structure and assembly process; polarization resistance is formed by the electrode reaction, and is related to the nature of the electrode reaction and the battery material; the smaller the internal resistance of the battery, the output current of the battery will cause the battery The smaller the internal voltage drop, the higher the working voltage and the larger the current the battery will output, the more energy and capacity it can output. Self-discharge: After the battery is fully charged and left unused for a period of time, the phenomenon of capacity reduction or loss is called self-discharge. Cycle life of Ni-MH battery: The rechargeable battery undergoes a charge and discharge process, called a cycle or a cycle. Under a certain charging and discharging system, the battery can withstand the cycle before the battery capacity drops to a certain value. The number of times is called the cycle life of the rechargeable battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.