Common sense problem with lithium batteries

1. Do users want to activate the battery for the first time?

Before the lithium battery is delivered from the factory, the lithium battery manufacturer will divide the capacity of each battery-that is, constant pressure charging, and then discharge, so that several cycles are carried out so that the electrode can fully infiltrate the electrolyte, fully activate, and reach the required capacity. This is actually an activation process. So lithium-ion batteries have been activated in the user's hand.

Despite this, the manufacturer will still recommend that the user's initial battery should be fully charged 3-5 times. This is mainly to consider the existence of a process from the battery factory to the user's hand, which is as short as one month and as long as six months. At this time, the battery electrode material will be passivated. So this is done in order to eliminate the passivation of the electrode material and achieve maximum capacity.

2. The battery charging time is too long or the battery is completely consumed?

The structure of the lithium battery is mainly composed of a core, a shell, and a protective circuit. The protective circuit is to prevent this phenomenon from affecting battery life.

The principle of the protection circuit is

1, during the charging process, when the battery voltage reaches a certain set value, the circuit connected to the protection plate and the core will be disconnected, so that the outside world will no longer charge the core.

2, in the discharge process, when the battery's voltage is lowered to a certain set value, the connection circuit between the protective plate and the core will also be disconnected, and the core will no longer discharge externally.

3, does lithium battery have a memory effect?

The memory effect is a temporary loss of capacity (generated after several incomplete bursts) and can be restored after several deep bursts. Lithium batteries do not have this effect, but there is a similar inert effect (this is different from the memory effect, other batteries have this effect) refers to the chemical substances in the battery that do not participate in the reaction for a long time and become lazy. It will not react. It's no use going deep. Therefore, there is no need to deliberately discharge when using it, and there is no problem with letting it go naturally. In addition, if you do not use it for a long time, you should retain 30 % of the electricity, which can extend your life.

3.The higher the battery capacity, the better?

The higher the capacity of different models and sizes of batteries, the longer the service time. Regardless of the factors of volume and weight, the higher the capacity, the better. But the same battery model, the nominal capacity (such as 700mAh) is also the same, and the actual initial capacity is different: for example, one is 760mAh and the other is 705mAh, then 760mAh is better than 705mAh.

The actual situation may be that the high capacity is due to the increase in the initial capacity of the electrode material, and the reduction of the electrode stability, the result is that after the recycling of dozens of times, the high-capacity battery rapidly fails. Low capacity batteries are still strong. Many domestic core manufacturers often use this method to obtain high-capacity batteries. The user's standby time after half a year is a mess.

The cost of increasing capacity is to sacrifice the cycle life. Manufacturers can not really "increase" the battery capacity without changing the battery material.

The page contains the contents of the machine translation.