18650 battery charging time introduction

The 18650 battery charging time is the same as the theory of all secondary battery charging time, that is, the battery charging time is equal to the ratio of the nominal capacity to the charging current. However, since the lithium battery is internally charged when it is charged, the 18650 battery is charged. Time should consider factors that overcome this impedance.

A factor is designed based on the magnitude of the impedance as a comparison of the charging time of the rechargeable battery. After long-term experiments, the acquisition method of this coefficient is simplified as the proportion of the charging current to the nominal capacity. Thus, the above 18650 battery charging time evolved into:

18650 battery charging time = nominal capacity ÷ charging current × coefficient

According to the national standard, the rechargeable battery should be charged at no more than 0.2C (C is the nominal capacity). According to this standard, the above coefficient is set to at least 1.2. Due to the high capacity of the 18650 lithium battery, plus different lithium battery charging. The characteristics of the manufacturer's charger are generally set to 1.5 for the calculation of the charging time of the 18650 battery. The charger is basically designed according to this principle. For example, the capacity of 18650 battery is generally 1800~2600mAh. According to the above formula, the choice of charger and the charging time of 18650 battery (discharge within 0.2C) are as follows:

1800mAh generally uses a 350mA charger, charging about 7.5 hours (1800 ÷ 350 × 1.5)

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