Forklift battery charging process
1. Check before charging: whether the battery is intact, whether the wiring is intact, and open the gas cover.
Do not open or pull out the liquid injection plug on the battery
Do not add liquid before or during charging
Smoking, sparks or open flames are strictly prohibited near the battery
The battery cannot be discharged at the same time while charging
Do not leave metal tools on the battery while charging
Do not repair the battery while charging
When charging, the electrolyte temperature is lower than 55℃
2. If it is a new battery, cool the electrolyte with a specific weight of 1.26 to 30°C and inject it into the battery. The injection amount should be 10-20 mm higher than the protective plate. Wait for 6 hours and the liquid temperature drops below 35°C. Start charging. The specific gravity of the electrolyte refers to 30 ℃, at different temperatures should be converted according to the following formula: D30 ℃ = Dt + 0.007 (t-30 ℃)
3. During the charging process, the electrolyte temperature should not exceed 55℃, otherwise measures such as reducing the charging current, artificially cooling the temperature or suspending the charging should be taken.
4. When the battery is charged to saturation, the voltage and the specific gravity of the electrolyte will not rise within 2 to 3 hours, and a large number of bubbles will appear. The specific gravity of the electrolyte reaches 1.26 and the single cell voltage reaches 2.4V.
5. When the single cell voltage drops to 1.7V, the voltmeter voltage is 41V (driving load), and the electrolytic specific gravity drops to 1.18, it should be charged in time.
6. At the end of battery charging, use distilled water or dilute sulfuric acid with a specific gravity of 1.4 to adjust the specific gravity of the electrolyte to 1.26 and maintain a sufficient height. The specific gravity of voltage and electrolyte should be recorded at the beginning and end of battery charging. The records will help the maintenance and assurance analysis of the battery.
7. Keep the battery away from fire and heat sources. After charging, close the gas cap, wipe off the splashing electrolyte, keep the connector clean and dry, and apply petroleum jelly. Battery flushing must be carried out of the vehicle.
8. The battery charging environment must be well ventilated. Especially when the car is charging, it must be forced to exhaust the air around. The ventilation equipment of the battery charging room must be good, the temperature should not be higher than 40°C, the air flow can be calculated to avoid the explosion caused by the accumulation of hydrogen-oxygen mixed gas when the battery is charged, and can be calculated by the following formula: Q=0.05×I×N (where Q : Air flow, I: Charging current at the end of charging, N: Number of battery cells), should ensure that the air flow in the charging room is greater than the air flow in the calculation formula.
9. The initial and normal charging data of the battery can refer to the following table, (if the battery has a manual, please follow the instructions)
Initial charge
Ⅰ Ⅱ Ⅰ Ⅱ
Current (A) Time (h) Current (A) Time (h) Current (A) Time (h) Current (A) Time (h)
45 35-45 26 35-50 62 4-6 31 6-10
The charging time of the first stage can be controlled according to the charging characteristics. When the battery voltage rises above 2.4V, it can be changed to the second stage charging.
Note: An automatic charger can be equipped. The charging procedure will automatically charge the battery without overcharging or undercharging.
Battery safety instructions
1. Daily inspection
1. Liquid level
Below the rated liquid level will shorten the service life of the battery, and too little electrolyte will cause the battery to heat and damage, so you must always pay attention to whether the electrolyte is sufficient.
2. Terminals, wires, covers
Always check the corrosion of the battery terminal joints and the connection with the wires due to oxidation, and check whether the cover is deformed or whether there is heat.
3. Appearance
Dirty battery surface will cause leakage, and the battery surface should be clean and dry at any time.
Second, maintenance
1. Add water
Add distilled water according to the specified liquid level. Do not add too much distilled water in order to prolong the interval of adding water. If too much water is added, the electrolyte will overflow, causing leakage.
2. Charging
The battery will generate gas during the charging process. Keep the charging place well ventilated and there is no open flame around. At the same time, the oxygen and acid gas generated during the charging process will affect the surroundings.
Unplugging the charging plug during charging will cause an arc, and the plug can only be unplugged after turning off the charger.
After charging, there is a lot of hydrogen remaining around the battery. No open flame is allowed. Open the cover of the battery for charging.
3. Maintenance of terminals, wires and covers
Only professional and technical personnel designated by the manufacturer can proceed.
4. Clean
If it is not too dirty, you can clean it with a damp cloth. If it is very dirty, you should remove the battery from the car, wash it with water and let it dry naturally.
3. Custody
1. Storage place
It cannot be short-circuited;
A short circuit caused by rain may cause a fire and may generate a small amount of hydrogen. Therefore, the battery must be stored in a ventilated and cool place.
2. Used batteries
Waste batteries still contain electrical energy, and should be kept in accordance with the storage method of the batteries used.
4. Operation of electrolyte
1. Check the specific gravity
Use a suction-type hydrometer to check the specific gravity. Do not let the electrolyte splash out during the operation and wear protective equipment.
2. Operations other than inspection
Consult a professional, especially when replenishing electrolyte (dilute sulfuric acid).
3. Electrolyte leakage
If the battery is overturned or damaged and the electrolyte leaks, emergency treatment should be carried out immediately (refer to emergency handling items)
5. Operation of end-of-life batteries
1. Operation of end-of-life battery
When the battery is nearing the end of its life, the electrolyte in the single-cell battery diminishes very quickly, and distilled water should be added daily.
2. Disposal of waste batteries
For used batteries, extract the electrolyte to decompose the batteries. It is possible to discuss whether the battery manufacturer should recycle it.
6. Emergency treatment
1. Electrolyte splashed on the skin
Rinse with plenty of water
2. Electrolyte splashed into eyes
Rinse with plenty of water and receive treatment from a professional doctor
3. Spilled electrolyte on clothes
Take off your clothes immediately, rinse with water and then rinse with weak alkaline soap.
4. Electrolyte leakage
When the electrolyte leaks to the outside, immediately neutralize with lime, strong carbonate soda or carbonate soda, and rinse with plenty of water.
