Recovery of the battery after its damage is possible in some cases, however, none of the existing methods gives a 100% guarantee of proper operation.
Necessary
- - source of power;
- - indicators of current and voltage;
- - batteries;
- - bulb;
- - device for measuring temperature;
- - thermal grease.
Instructions
Step 1
Find the tools you need to recover. Please note that the power supply must have a continuously variable voltage regulation. You will also need an ammeter and voltmeter if the required indicators are missing from the power supply. Find a light bulb or other load device. It is also desirable to have a thermal sensor and a thermal relay to interrupt the current supply.
Step 2
Please note that the resistance of the device you have chosen should be calculated as a result of dividing the nominal voltage of the recovered battery by the required current strength. In turn, the last parameter is taken from the following calculation: I = 0.4 C (baht). Check the voltage periodically and do not let it drop below 0.9 V. The temperature should not rise above fifty degrees Celsius.
Step 3
Discharge your battery before the recovery procedure to a voltage equal to 1V, here connect a light bulb or any other load and voltmeter of your choice, installing them in parallel with the element. Check the temperature and voltage, if the readings are close to unwanted marks, temporarily disconnect the load and let the element cool down. It is best to let the voltage rise after that, so leave it on for 20-25 minutes, and then recharge it again to 0.9 V.
Step 4
Proceed to the charging process by connecting the device for measuring the amperage to the charged cell in series, and the power supply in parallel with the voltmeter. Hold one contact in the position of the free pole of the recovered battery, and connect the other to the unoccupied contact of the current indicator. Pre-install the thermal sensor and thermal relay using special thermal paste, this will help you avoid inaccuracies.
Step 5
Set the rheostat to the position of maximum resistance, and the voltage regulator to the lowest value, then gradually increase the load until the indicator on your ammeter shows the following value:
I (charge) = 0.1C (baht)
Step 6
Watch how the current strength indicator drops, do not forget to raise the voltage at the same time about once every 3-4 minutes during the first hour, and then every hour until the voltage is equal to the nominal one. After that, do not increase this indicator. When (after about 5 hours) the amperage approaches zero, unplug the charger. Wait half an hour for the processes to return to normal.
Step 7
Connect the battery to the charger and leave it connected to the power source for about 8 hours. Do not forget to ensure that the temperature level does not exceed the maximum permissible value. If there is a tendency to become very hot, reduce the amperage by half. After the battery has cooled down to about 30 degrees, gradually increase the value again.
Step 8
If you want to restore your battery to its original capacity, repeat this cycle 3 or 4 times. Be careful and remember to monitor the temperature.
