# Lithium battery charging time

APR 15, 2019   Pageview：50

Knowing the charging time of lithium batteries, from the difficulty level, the operation problem is not big, and clarifying the source of lithium battery charging time is more helpful to make it more scientific in theory and practice.

The theoretical lithium battery charging time is the ratio of the battery's nominal capacity to current:

Lithium battery charging time (h) = battery capacity (mAh) ÷ charging current (mA)

However, since there is impedance during charging, in order to offset the influence of the impedance, the actual charging time is greater than the above theoretical charging time. In order to make the charging time of the lithium battery meet the actual full power requirement, it is generally based on the ratio of the charging capacity to the battery capacity. The size is set to a factor greater than one for example,

When the charging current is less than or equal to 5% of the battery capacity, the coefficient is 1.6.

Lithium battery charging time = battery capacity ÷ charging current × 1.6

By analogy, according to the ratio of the battery capacity of the charging current, the coefficient of the lithium battery charging time is calculated.

1.5 (5% < charging current 10%),

1.3 (10% < charging current 15%),

1.2 (15% < charging current 20%),

1.1 (20% < charging current).

In practice, the lithium battery charging time of portable electronic products is also designed according to the above formula. These lithium batteries are generally equipped with corresponding constant current chargers and the lithium battery charger controls the charging time of the lithium battery to be full. The electric indicator light indicates that when the battery is fully charged, an alarm signal will be issued. Therefore, the consumer only needs to follow the instructions, and it is not necessary to charge the lithium battery for a long time.

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