What are the correct charging methods for lithium batteries?

Lithium has a lifetime of 300-500 charging cycles. Assuming that the amount of electricity provided by a complete discharge is 1Q, if the reduction in the amount of electricity after each charging cycle is not considered, lithium electricity can provide or supplement 300Q-500Q of electricity in total during its lifetime. From this we know that if you charge 1/2 at a time, you can charge 600-1000 times; If you charge 1/3 at a time, you can charge 900-1500 times. By analogy, if the charge is random, the number of times is uncertain. In short, no matter how charged, the total amount of electricity added to 300Q-500Q is constant.

Therefore, we can also understand that lithium battery life is related to the total charge of the battery, regardless of the number of charges. The effects of deep charge and shallow charge on the electrical life of lithium are not significant. Then, when some MP3 manufacturers advertised, they said, "A certain model MP3 uses a tough lithium battery and can charge more than 1,500 times. "This is purely deceiving the consumer ignorance.

In fact, the shallow charge is more beneficial to lithium electricity, only when the power supply module of the product is done for lithium electricity, there is a need for a deep charge. Therefore, the use of lithium power supply products do not have to stick to the process, everything to facilitate first, charging at any time, do not worry about affecting life.

Avoid charging at too high a temperature

If lithium is used in an environment higher than the specified operating temperature, that is, 35 °C, the battery's power will continue to decrease, that is, the battery's power supply time will not be as long as usual. If you have to charge the device at this temperature, the damage to the battery will be even greater. Even if the battery is stored in a hotter environment, it will inevitably cause corresponding damage to the quality of the battery. Therefore, it is a good way to prolong the lithium electric life to keep the operating temperature at the optimum.

Avoid charging at too low a temperature

If lithium is used in a low-temperature environment, that is, below 4 °C, it will also be found that the battery's service time is reduced. Some mobile phones 'original lithium power is not even charged in a low-temperature environment. But don't worry too much, it's just a temporary situation. Unlike the use in high-temperature environments, once the temperature rises and the molecules in the battery are heated, they immediately return to their previous electricity.

Regular use

Life is about movement. To maximize the performance of lithium-ion batteries, it is necessary to use it often so that the electrons in the lithium battery are always in a state of flow. If you do not often use lithium electricity, please remember to give lithium electricity to complete a charging cycle every month, do a charge calibration, that is, deep charge once.

In recent years, the market share of lithium batteries has increased rapidly, and lithium batteries have developed rapidly. According to relevant data, the lithium-ion battery market is expected to reach 450 billion yuan in 2020. Then, as more and more people use lithium batteries, there are also some concerns and hidden dangers. At present, lithium-ion battery technology is relatively mature, correct use of the lithium-ion battery, lithium-ion battery charge, and discharge, not only can guarantee the battery service life, but also can avoid safety hidden dangers.

Regarding how lithium batteries are charged, we know that lithium batteries require a supporting charger for charging. In the industrial supporting market, since each product is also individually packaged and non-universal, the corresponding charger should be selected according to the lithium batteries used. Charge strictly according to the requirements. Regardless of whether it is an industrial or civil market, the basic principle of how lithium-ion batteries are charged is the same. Therefore, the steps and standards for charging lithium batteries can be standardized. Under normal circumstances, the nominal voltage of lithium batteries is 3.7 V, and the charging voltage is 4.2 V. Here we take the 1000mAh battery capacity as an example to illustrate the correct charging method for lithium batteries.

That's the correct way to charge a lithium battery.

Lithium battery charging is divided into two phases:

First, constant current charging, that is, the current is certain, and the lithium battery voltage gradually increases with the charging process. According to the above specification, it is generally charged with a current of 0.2 C (C is a representation of the battery's nominal capacity and current, 0.2 C is 200mA). When the battery voltage is close to the full voltage of 4.2 V, the constant current charge is changed to a constant voltage charge. This process is about five hours.

Second, constant voltage charging, that is, the voltage is certain, and the current gradually decreases with the saturation degree of the core. According to the specification, when the current decreases to 0.01 C, that is, 10mA, the charge is considered to be terminated. After this process and constant current charging time is added, the total charging time should not exceed eight hours. Therefore, there are two criteria for judging whether lithium battery charging has reached saturation: first, the current is 0.01 C, and the second is that the total length of the lithium battery does not exceed eight hours. In other words, if the lithium battery charging process still cannot reach 0.01 C after eight hours, it is considered not qualified. At this point, we have a theoretical understanding of how lithium batteries are charged. When users charge lithium batteries, they only need to charge according to the normal charger instructions, because regular lithium battery chargers are designed according to the characteristics of lithium batteries. Charging mode, that is, including the constant current and constant pressure charging process, we only need to determine whether the battery is full according to the charger's indicator light. If the charger is abnormal, we can rely on 8 hours (if your charger is 0.1 C).

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