How to activate and repair NiMH batteries

　　Author ：Iflowpower – Portable Power Station Supplier

How to activate the nickel-hydrogen charging battery 1, cannot use a high voltage to activate the nickel-hydrogen charging battery because its protective voltage of its protective plate is the upper limit, the high voltage will burn the MOS tube, lithium ion battery on the protective plate. Activation To charge the positive and negative poles of the charger to the positive and negative electrode of the battery. When the voltage rises to the lower line voltage of the protective plate, the protective plate will work properly, and the charge and discharge is performed normally.

2. The purpose of the new old MH-Ni battery is different, and short-circuit experiments should be used to activate new batteries. After long-term use, the capacity of the old NIMH battery will decrease.

At the same time, the effective output of the capacitor will be affected by the oxide layer that appears in the internal electrode, which will add the internal resistance of the battery, and cannot reverse the capacitor reduction. Therefore, reducing the internal resistance of the battery is the key to activating the old NIH battery, otherwise the old NIH battery will be increasingly adapted to a large current device. 3.

The self-discharge of the MH-Ni battery is relatively large, and the power is gradually lost during the long-term transition process, so that the activity of the battery is lowered, and the sleep state is entered. If the battery does not charge and discharge, the output capacity cannot reach the rated capacity due to the memory effect of the MH-Ni battery. In a detailed charge and discharge method, three complete charge and discharge are usually performed, with the charging mode of 0.

1c, which is due to the battery is not activated, and the charging intensity is low, the large current charge will cause damage to the electrode. 1. Complete the MH-NI battery.

According to the status of the battery, when the load discharge voltage is close to 0 volts, the straight short circuit battery or the electric resistance of 1 euro is about 5 to 10 hours. This can be alert due to accidental short circuit after adding water, and can reduce electrochemical corrosion in the water impregnation process. Open the safety valve.

Sanyo and Sony (SONY) have four caves. You can see the rubber cover of the safety valve Use the gear wire to bend into a U-shaped (I use 1 to 4 resistors). Then insert about 2 mm from the bottom of the rubber cap to the center.

Such a safety valve is forced to open, and the u-shape is bent into a rubber cap. 2. Burn the battery with boiling water until the foam is no longer bubble, but do not burn the battery, but boil water, burn it.

Immediately put it in a cold (room temperature) pure water bottle, wait for 1 minute, when some water is inhaled, immediately tighten the cap and squeeze for about 10 seconds, let more water enter the battery: take out the MH-Ni battery, bake Dry, pull out U-shaped wires, tip the skin. It is best to use a large cross screwdriver with a hammer, the top position of the top, with the sealing degree of the new safety valve, the concave 0.5mm, and more dangerous conditions when hitting.

3. After storage for 5 hours, repeat charge and discharge 3-5 times. With the fast charging of about half an hour, then charge to the terminal voltage exceeding 1.

45V (for a long time), then use a medium or slow charger. 4. Re-determination.

After 5 hours of fully charged, the ZB210 multi-function battery capacity detector is discharged to the end in a cross flow in a 1-A, then marked with a paint pen on a nickel-hydrogen battery (10mAh, circular). .