What are the repair methods for Ni-MH batteries?

The first step of the repair method of the nickel-metal hydride battery is to completely discharge the nickel-metal hydride battery. According to the current situation of the battery, the battery is directly short-circuited or the load is discharged with a resistance of 1 ohm until the terminal voltage is close to 0 volts, which is about 5-10 hours. This can prevent accidental short-circuit of the battery after adding water and burn the battery, and can reduce the electrochemical corrosion when immersed in water. Step 2: Open the safety valve. There are four holes in the positive electrode of the battery of Sanyo, SONY and other brands. You can see the rubber cap of the safety valve. Use a thin iron wire to bend into a U-shape, and then insert about 2 mm from the bottom of the rubber cap to the center. In this way, the safety valve is forced to open, and it is bent into a U-shape in order not to damage the rubber cap. Step 3: Use freshly boiled water to scald the nickel-metal hydride battery, and wait until the positive electrode no longer bubbling, but remember not to boil the battery, but to boil the water and then scald it. Put it in the bottle of cool purified water immediately, and wait for about 1 minute. At this time, part of the water has been inhaled. Immediately twist the cap and squeeze the bottle for about 10 seconds to make more water enter the battery. Step 4: Take out the Ni-MH battery, wipe it dry, pull out the U-shaped iron wire, and cover it. It is best to use a large Phillips screwdriver with a small hammer to slightly dent the center of the positive electrode cap to increase the sealing degree of the safety valve. It is enough to dent 0.5 mm. If you smash it too much, dangerous situations may occur. Step 5: After standing for 5 hours, start charging and discharging repeatedly 3-5 times. For the first charge, use fast charge for about half an hour, then use slow charge to charge the terminal voltage above 1.45V, and then use a medium-speed or slow-speed charger. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: How to charge the lithium iron phosphate battery pack correctly?