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What are the factors affecting the capacity of lithium batteries

Time:2021-01-21 Views:191

  There are four common influencing factors, namely discharge rate, temperature, terminal voltage, and board geometry.

  1. Discharge rate

  When charging at different speeds, the capacity of the battery is different. So when we discuss the rate or multiplier of the released capacity, it is just the amount of current used to discharge.

What are the factors affecting the capacity of lithium batteries

  2, temperature

  When the temperature of the electrolyte decreases, the viscosity of the electrolyte increases, the ions receive greater resistance, the diffusion ability decreases, and the resistance of the electrolyte increases, which increases the resistance of the electrochemical reaction, and some chemical substances cannot be converted normally. The charge capacity is reduced, resulting in a decrease in the capacity of the lithium battery.

  3, termination voltage

  When the lithium ion battery is discharged to a certain voltage value, the voltage drops sharply, and the energy obtained is actually very small. If it is discharged for a long time, the damage to the lithium battery is considerable. Therefore, the discharge must be terminated at a certain voltage value, and the cut-off discharge voltage is called the discharge termination voltage. Setting the end-of-discharge voltage is of great significance to prolong the service life of lithium ion.

  4. The geometric dimensions of the board

  The thickness, height and area of the plate all affect the capacity of the lithium ion battery. In fact, this is the problem of the contact area, which involves the reaction plate. The larger the area, the more reaction, and the battery capacity will increase.

  The capacity and life of lithium batteries are usually constant. It is not constant because the user's usage habits have a great influence on the lithium battery. Such as overcharge and overdischarge

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