602030 polymer battery.Nickel-metal hydride lithium battery technology and repair methods

How to repair nickel metal hydride batteries and how to activate nickel metal hydride rechargeable batteries? MH-Ni batteries theoretically have no memory effect. For batteries with reduced capacity due to memory effects, we can repeat them several times with sufficient and one-time discharges at a time, and most of the batteries can be repaired. The main characteristics of MH-Ni batteries are small internal resistance and large discharge current, so many digital cameras use 1.2V MH-Ni batteries for power supply.

How to repair nickel metal hydride batteries and how to activate nickel metal hydride rechargeable batteries? MH-Ni batteries theoretically have no memory effect. For batteries with reduced capacity due to memory effects, we can repeat them several times with sufficient and one-time discharges at a time, and most of the batteries can be repaired. The main characteristics of MH-Ni batteries are small internal resistance and large discharge current, so many digital cameras use 1.2V MH-Ni batteries for power supply. Currently, MH-Ni batteries are used in different products, and a certain understanding of their use and maintenance is required. Many MH-Ni rechargeable batteries are now intact and most are discharged. Since nickel-metal hydride batteries have a self-discharge reaction, nickel-metal hydride batteries will not be overcharged for a long time. If the internal resistance is too large, the battery will not be charged and the battery will be wasted. The Energy Storage Electrical Editor below shows you how to repair NiMH batteries. 1. Completely discharge the MH-Ni battery. Depending on the current condition of the battery, when the load discharge voltage is close to 0 volts, it will take about 5 to 10 hours to directly short-circuit the battery or use a 1 euro resistor. This prevents the battery from burning due to accidental short circuit after adding water, and can reduce electrochemical corrosion during water immersion. Open the safety valve. Brands such as Sanyo and Sony have four holes in the positive terminal of their batteries. You can see that the rubber cover of the safety valve is bent into a U shape using thin wire (I used pins from 1 to 4 resistors). Then insert about 2mm from the bottom of the rubber cap to the center. In this way, the safety valve is forced to open and is bent into a U shape to avoid damaging the rubber cap. 2. Use boiling water to boil the battery until the foam stops foaming, but remember not to boil the battery, but to boil the water to boil it. Immediately put into a cold (room temperature) purified water bottle and wait for about 1 minute. When some water is sucked in, immediately tighten the bottle cap and squeeze for about 10 seconds to let more water enter the battery: Take out the MH-Ni battery and bake it To dry, pull out the U-shaped wire and cover the skin. It is best to use a large Phillips screwdriver and a hammer. The center of the top is slightly concave to increase the sealing degree of the safety valve. A concave of 0.5mm is sufficient, but more dangerous situations will occur during impact. 3. After 5 hours of storage, charge and discharge should be repeated 3-5 times. Use fast charge for about half an hour, then slow charge until the terminal voltage exceeds 1.45V (which takes a long time), then use a medium or slow charger. 4. Redefine capabilities. After it is fully charged for 5 hours, the "ZB210 Multifunctional Battery Capacity Tester" discharges to the end in a 1-A cross-current manner, and then uses a paint pen to mark the capacity (10mAh, round) on the nickel-metal hydride battery. How to activate nickel-metal hydride rechargeable batteries 1. High voltage cannot be used to activate nickel-metal hydride rechargeable batteries, because the protection voltage of its protective board has an upper and lower limit. High voltage will burn out the MOS tube on the protection board. The activation of lithium batteries requires Directly charge the positive and negative poles of the charger to the positive and negative poles of the battery. When the voltage rises to the lower line voltage of the protection board, the protection board will work normally and charge and discharge normally. 2. The activation purposes of new and old MH-Ni batteries are different, and short circuit tests should not be used to activate new batteries. After long-term use, the capacity of old NiMH batteries will decrease. At the same time, the effective output of the capacitor will be affected by the oxide layer produced by the internal electrode, which will increase the internal resistance of the battery and cannot reverse the reduction in capacitance. Therefore, reducing the internal resistance of the battery is the key to activating old NiH batteries, otherwise the old NiH batteries will become increasingly unable to adapt to high-current devices. 3. The self-discharge of MH-Ni batteries is relatively large, and it will gradually lose power during the long-term transition process, causing the battery activity to decrease and enter a dormant state. If the battery is not charged and discharged many times, the output capacity cannot reach the rated capacity due to the memory effect of the MH-Ni battery. In the specific charging and discharging method, three complete charging and discharging are usually performed, in which the charging method is 0.1C. This is because the battery is not activated and the charging intensity is low. High-current charging will cause damage to the electrodes. The above is the activation method of lithium battery. Lithium battery needs to be activated, but this is what the lithium battery manufacturer has to do, not what the user has to do.