Battery Shelf Life And Period Of Use Are Also Important

Battery Shelf Life And Period Of Use Are Also Important

The internal resistance of the battery is the resistance that the current passes through the inside of the battery. It includes ohmic resistance and polarization resistance, polarization resistance, including electrochemical polarization resistance and concentration polarization resistance. Due to the presence of internal resistance, the operating voltage of the battery is always less than the battery electromotive force or open circuit voltage. The internal resistance of the battery is not constant and changes over time (gradually becoming larger) during the charging and discharging process. This is because the composition of the active substance, the concentration and the temperature of the electrolyte are constantly changing. The ohmic resistance follows the Ohm's law, and the polarized internal resistance increases with the increase of the current density, but not the linear relationship. Often increases with increasing current density.

Storage life refers to the maximum time allowed to be stored between the battery and the start of use, in years. Including the shelf life and the duration of the battery, including the total period of validity. The life of the storage battery has a dry storage life and a wet storage life. The cycle life is the maximum number of charge and discharge cycles that the battery can achieve under the specified conditions. In the provisions of the cycle life must also specify the charge and discharge cycle test system, including charge and discharge rate, discharge depth and ambient temperature range.

Dry batteries are also called manganese zinc batteries, the so-called dry batteries is relative to the volt battery, the so-called manganese zinc refers to its raw materials. For other materials such as silver batteries, nickel-cadmium batteries. The voltage of the manganese zinc battery is 15V. Dry batteries are consumed by the consumption of chemical raw materials. Its voltage is not high, can produce the continuous current can not exceed 1 amp.

The battery is one of the most widely used batteries. With a glass groove or plastic tank, filled with sulfuric acid, and then insert two pieces of lead, one with the positive charger connected, a negative connection with the charger, after 10 hours of charging to form a battery. There is a voltage of 2 volts between its positive and negative poles. The benefits of the battery can be repeated many times. In addition, because of its very small internal resistance, it can provide a large current. Use it to the car's engine power supply, instantaneous current up to 20 amps. When the battery is charged, the electric energy is stored and the chemical energy is converted into electrical energy when discharged.

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