Battery internal resistance depends on the resistance of the plate and the ion flow impedance

Battery internal resistance depends on the resistance of the plate and the ion flow impedance

Battery parameters

Battery of five key parameters: battery capacity, nominal voltage, internal resistance, discharge termination voltage and charge termination voltages. Battery capacity is usually Ah (ampere hours), said, 1Ah is able to 1A of current, discharge for 1 hour. Unit cell with the number of live material and the decision unit * battery charge with the amount of live material and content * the materials used by the battery and the volume of decisions, therefore, usually the larger battery volume, the higher capacity. And battery capacity is a parameter related to the battery charge current. Battery charge current charge rate is usually expressed C, C is the rated battery capacity. For example, with 2A current on 1Ah battery charging, the charging rate is 2C; Similarly, with 2A current on the 500mAh battery, the charging rate is 4C SONY Laptop Battery TOSHIBA Laptop Battery .

The battery just the factory, positive and negative potential difference between the nominal voltage as the battery. Nominal voltage electrode potential from the electrode material and the internal electrolyte concentration. When the ambient temperature, use of time and work status changes, the unit cell of the output voltage changes slightly, in addition, the battery output voltage and the battery power is left there is a certain relationship. Cell nickel-cadmium battery nominal voltage of about 1.3V (but is generally considered to 1.25V), cell Ni-MH battery nominal voltage of 1.25V.

Battery internal resistance depends on the resistance of the plate and the ion flow impedance. In the charge-discharge process, the plate resistance is unchanged, but the impedance of ion flow will vary with the electrolyte concentration changes and changes in the change of charged ions

Battery fully charged, the very board of live material has reached saturation point * and then continue charging the battery voltage will not rise, then the voltage as charge termination voltage. Nickel-cadmium battery charge termination voltage of 1.75 ~ 1.8V, Ni-MH battery charge termination voltage of 1.5V.

Table 1-1 nickel-cadmium batteries of different discharge rate of discharge termination voltage

Battery discharge termination voltage is the minimum allowable discharge voltage. If the voltage is lower than the discharge termination voltage battery to discharge, the battery voltage will drop rapidly at both ends to form a deep discharge, so that the resultant formation of plates when the normal charge is not easy to be recovered and thus affect the battery life. Discharge voltage and discharge rate of the termination. Nickel-cadmium battery discharge voltage and discharge rate of termination of the relationship between the listed in Table 1-1, Ni-MH battery discharge termination voltage of the general provisions of the 1V.

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