How do you charge a polymer battery without a protective panel?

The polymer battery of the protective plate can be charged according to the correct charging method, but after being filled quickly, it should be removed immediately to stop charging;

Role of polymer battery panels:

1: Effective protection of over-charging behavior, automatic shutdown of charging after the battery is filled; Protect the battery from overcharging.

2: Effective protection of excessive discharge behavior, the battery is not conducive to the complete use of electricity; Seiko dual protection panels will have a specific cut-off voltage of 2.25 V-3 .0 V, and automatic power cuts will shut down the battery. Ordinary double protection panels will shut down the battery at a specific cut-off voltage of 2.25 V-3 .25 V.

3: Effective protection of the battery to prevent short circuit, the so-called short circuit, that is, positive and negative and the impact caused by the internal tissue of the battery caused the battery body to heat up, rise, can not use the problem.

Effective protection of battery power loss. Often the behemoths, guarded by the inconspicuous, think of a car, brakes and clutches that add up to little.

The current mobile power supply, and even all batteries, is the same, especially batteries using polymer cores, in this area is more urgent.

Now there are few detachable batteries, whether mobile phones or mobile power supplies, but friends who have noticed detachable cell phone batteries before know that the batteries are divided into two parts, one is the core and the other is a small circuit board., through the small circuit board, We can charge and discharge.

And that tiny circuit board is the protective plate for the polymer battery.

After so many years of development, there are already many models of protective panels. The style of protective panels produced by different manufacturers have different performance, but the basic functions are still the same.

1) Overcharge protection function:

Overcharge protection refers to the prohibition of charging by the charger when it reaches or exceeds the rated charging voltage. That is, the control of the MOS tube into the off state, stop charging.

2) Over protection function:

The over discharge protection function stops the discharge on the load when the battery voltage becomes lower. The controlled over discharge MOS tube is put into the shutdown state and its discharge is prohibited. Therefore, the product will be automatically shut down, forming an over-release protection effect, which is exactly the opposite of the action of overcharging detection.

3) Over stream protection function:

The over current protection function stops the discharge of the load when a large current is consumed. The purpose of this function is to protect the battery and the MOS tube and ensure the safety of the battery in the working state. When the battery is discharged, the protective plate will have a maximum limit current., Different products are different. When the discharge exceeds this current protection plate, it will automatically turn off. After the over current detection, the battery and the load will return to normal and can be recharged or discharged.

4) Short circuit protection function:

When the battery is accidentally short-circuited, the protective plate will automatically close within a few milliseconds and will not be energized. At this time, the positive and negative poles will not touch one piece. The resulting short-circuit protection will not cause a fire incident.

It is useless to question the safety and stability protection effect of the protective plate on the charge and discharge of the electric core, and it is even more irreducible. Now, whether it is a polymer or a 18650 core, the circuit of the protective plate will basically be added to the circuit to ensure the safety of the battery.

The most classic case must be Samsung note 7. In order to increase battery capacity, the volume of the protective plate was reduced. As a result, the circuit board was squeezed when the core was released from heat, causing the positive and negative contact to cause a short circuit and become a "bomb."

The page contains the contents of the machine translation.