New lithium battery charge

Lithium batteries are widely used in various fields: consumer electronics, power tools and power cars, all of these lithium batteries are the same principle, people are most concerned about the lithium battery life problems, and this lithium battery with the scientific use, Especially the scientific charge and discharge are closely related, often being raised by a topic is how the new lithium battery charge.

      Most of this problem is for portable electronic products with lithium batteries, to explain how the new lithium battery charging, the premise is to clear the new lithium battery charging characteristics:

      1, the new lithium battery activation: lithium battery core in the factory has been activated by the battery manufacturers (using a dedicated charge and discharge equipment to activate), the user does not need to get the new battery after the first three 12-hour charge activation, only in accordance with the normal Method can be charged;

      2, the new lithium battery charging method: lithium battery generally has a protective board, and the protection board by the protection of IC and power MOSFET composition, with self-protection function, the charging device (charger) is also highly targeted, whether it is plug or Cradle is also a protective circuit to play a role, that is, lithium battery work and charging process design is the implementation of the program operation, the user simply use the charger to charge the battery can be.

      3, the new lithium battery charging time: the new lithium battery charging time generally depends on two factors: First, lithium battery charge (that is, the remaining capacity), the second is the charging current.

      From the charging current point of view, the scientific test method is to 0.2C (5-hour rate) charge, regardless of other factors, from 2.75V charge to 4.2V takes 5 hours. But practical, manufacturers in the design of the charger for the battery can be more quickly, usually 2-4 hours full; large-capacity lithium battery is certainly not the same, for example, power lithium battery may really have more than 10 hours to full.

      Lithium battery with how much power and discharge depth, such as 80% of the depth of the discharge means: lithium battery before charging with 20% of the remaining capacity. The new lithium battery will also have a certain amount of electricity from the lithium battery manufacturers will come out when there are 50 to 60% of the electricity, because the lithium battery self-discharge is very small, so this 50 to 60% of the power consumption of the slow, In the case, if the battery is shipped within 3 months can be used directly without charging, shelved for more than six months (from the battery factory when the new lithium battery is best to recharge and then use, because to prevent over-discharge. 3 to 6 months between the first charge or the first use of lithium battery performance is not a big impact.

      From the theoretical point of view, the charging time is the ratio of capacity and current, it is clear that the charging current in certain circumstances, the new lithium battery charge when the charge is large, you need to charge the time naturally much less, it is easy to understand , Because the need to add a small amount of electricity. Due to the existence of the internal impedance of the battery to consume some of the current, so the actual charging time will be greater than the theoretical charge time, according to the battery charge different, on this basis there is a 1.1 to 1.6 range coefficient. In reality, the charging time is set by the protection IC to charge the voltage to achieve, that is, once charged to 4.2V near the lithium battery will automatically stop charging, then there will be indicators.