18650 battery charging precautions

18650battery charging can be decomposed into 18650 battery charging method, 18650 battery charging condition setting and 18650 battery charging precautions.

The premise of discussing 18650battery charging is: 18650 lithium battery and 18650 lithium battery charger are qualified.

Here we recommend a "large" brand. The brand owner Dongguan Juda Electronics Co., Ltd. is a professional battery manufacturer with 18650 batteries and supporting chargers. The R&D strength is in the forefront of the industry. The company's 18650battery can be imported according to different electrical requirements. Or domestically produced batteries, among which, the 18650 charger adopts the standard charging method of lithium battery, first constant current and constant voltage, the highest termination voltage is 4.23V, and the lowest is 4.18V, which fully meets the standard.

After selecting the authentic battery and charger, the 18650 battery is also very simple to charge. For the lithium battery charger designed by Dongguan Juda as a single 18650 battery, the charger for the general charger is only charged from the charger. The wires that lead to the positive and negative poles are connected to the battery respectively, and some designs can directly use the mobile phone charger they produce.

However, if the charger quality is not guaranteed, will you worry about the charger misjudgment? This problem exists. There are two ways to remedy the misjudgment. Consider the following: First, test with a voltmeter. If the battery voltage is at 4.2V, the other method is to charge the battery for about 10 hours. The hour value is based on the capacity setting of the 18650 battery. The average 18650 battery capacity is in the range of 1800~3000mAh, especially 2000~2600mAh. Therefore, choose 350mA and 400mA chargers, according to the formula:

18650 battery charging time = battery capacity ÷ charging current × 1.5 (coefficient)

The general 18650 battery is fully charged for 10 hours. Since the chargers of Dongguan and other manufacturers generally have constant voltage charging after constant current charging, it is not necessary to consider overcharging for 10 hours.

The standard of whether the 18650 battery is fully charged in the above example can also be used when referring to other lithium batteries.

Although the manufacturer has considered the charging conditions in the charger design, we still have to pay attention to some problems that the charger can't solve:

1, the standard charging current 0.2C, which is one-fifth of the nominal capacity, according to the capacity of the 18650 battery on the market, generally 350mAh or 400mAh on the line;

2. Control the limit temperature during charging, try to avoid charging below 0 °C, otherwise it will seriously affect the battery life;

3. Some batteries and chargers do not have a protection circuit, it will cause abnormal battery charging, overcharge may affect the battery performance, or affect the normal state of the charger, said above to avoid overcharging;

4. When the power is too low, the 18650 battery can be charged, and it is not necessary to wait until the battery power is put to the termination voltage to avoid over-discharge.

18650 battery applications are extremely wide. Consumers in the consumer electronics and industrial instruments, medical devices and other industries, including laptops, have an understanding of the safety and importance of 18650battery charging. The consumer must strengthen the understanding of the knowledge of 18650 batteries, in accordance with the scientific 18650 battery charging method, thus showing economic benefits in the application.

The page contains the contents of the machine translation.