Ni-MH battery charging current division method

Ni-MH battery charging, if the current is different, the charging effect and the impact on the power battery will have a big difference.

The expression of the charging current is the concept of magnification, which is numerically equal to the ratio of the charging current to the battery capacity, and the unit of measurement is mA. For example, a nickel-hydrogen battery with a nominal capacity of 2000 mAh, if charged with a current of 1000 mA, has a charging rate of 0.5 C. If charged with a current of 400 mA, the charging rate is 0.2 C.

Taking a single battery as an example, it is generally considered that:

Ni-MH battery charging is divided into three methods: small current, standard current and high current. The charging current is 0.1~0.3C. Less than 0.1C is a small current, and greater than 0.3C is a large current. Usually, the charging current cannot be greater than 1C.

The advantage of small current charging is to protect the battery, there is slight overcharge, but it has no influence on the battery; the shortage is that the charging time is very long;

The advantage of high current charging is that the charging time is short; the disadvantage is that continuous high current damages the battery and affects the service life.

The advantage of the standard charging mode is that the charging circuit is simple and the charging time is slightly longer, but this mode has achieved a balance between design complexity and taking care of battery charging time, which has been recognized by the industry.

Nickel-metal hydride battery packs In the choice of charging mode, nickel-metal hydride battery manufacturers will have their own color products, some focus on time, some focus on full power, and some design small current charging from a safety perspective.

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