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Six steps for nickel-metal hydride battery repair
- May 26, 2018 -

At present, nickel-metal hydride batteries are used in different products. We should understand the use and maintenance of nickel-metal hydride batteries. Now many nickel-metal hydride rechargeable batteries are not bad and most of them are bad. Because nickel-metal hydride batteries have a self-discharge reaction, the use of nickel-metal hydride batteries for a long time may result in over-discharge of the nickel-metal hydride batteries, resulting in excessive internal resistance and inability to charge the batteries. The batteries will also be wasted. Make repairs. The

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Specific steps:

The first step: completely discharge the battery after de-lighting, according to the battery status, let the battery directly short-circuit or use 1 ohm resistor when the load discharge to the terminal voltage close to 0 volts, it takes about 5-10 hours. This can prevent the battery from short-circuiting the battery after accidentally adding water, and it can also reduce the electrochemical corrosion when it is immersed in water.

The second step: open the safety valve. For example, Sanyo, SONY and other brands of batteries have four holes at the positive pole. You can see that the rubber cap of the safety valve has a U-shaped wire using a thin wire (I'm using a 1/4-resistor pin). Then insert approximately 2 mm from the bottom end of the rubber cap to the center. In this way, the safety valve is forced to open and bent into a U shape so as not to damage the rubber cap.

Step 3: Boil the battery with freshly boiled water and wait until the positive electrode does not bubble anymore. However, remember not to cook the battery, but boil the water and heat it.

Immediately put in cool (room temperature) purified water in the bottle, probably wait about 1 minute, when part of the water has been inhaled, immediately squeeze the bottle cap and squeeze the bottle for about 10 seconds, so that more water enters the battery:

Step 4: Take out the battery, dry it, pull out the U-shaped wire and cover it. The best use of a large Phillips screwdriver with a small hammer, the positive center of the cap slightly concave, in order to increase the safety valve seal, recessed 0.5 mm can be more than a dangerous situation.

Step 5: After 5 hours of standing, charge and discharge are repeated 3-5 times. For the first charge, charge with fast charge for about half an hour, then charge with a slow charge to the terminal voltage of 1.45V or more (take a long time), and then use a medium or slow charger.

Part VI: Reschedule capacity. In this case, it is fully charged for 5 hours before being discharged, and then it is discharged by 1A cross-flow using the "ZB210 Multi-Function Battery Capacity Tester". The capacity (accurate to 10mAh, rounded) is then marked on the battery with a paint pen.

After completing the above steps, do you feel that the battery has a feeling of rejuvenation? The above is personal experience sharing. For more information, you can continue to browse the site.