You will need
- Distilled water, syringe, glass tube with a diameter of about 5mm, the charger from 0.05-1.5 A.
First you need to measure the level of the electrolyte. For this you need to Unscrew the tube on the upper surface of the battery (good wide screwdriver), insert a glass tube the size of a ballpoint pen in one of the compartments and plunge it to the bottom. To shield the finger the upper hole of the tube and pull it out, the level of electrolyte in the tube equals the level in the battery (normal 13-15 mm), if higher, then you should suck up the excess electrolyte with a syringe, below – so time to top up distilled water.
Suck clean water into the syringe and pour 5-10 ml into each of the six sections of the battery. Thus, to achieve the desired level of electrolyte in the battery.
Take a special charger, connect it to the battery without closing the tube. This is necessary if there is too much electrolyte, it will be where to flow out. First 3-4 times to charge and discharge a battery to restore capacity. Then set the current device to charge at 0.1 A and monitor the voltage at the terminals. It is impossible to prevent boiling or overheating of the battery, if necessary, to reduce the charging current. Normal voltage when fully charged should be 13.9-14.5 V. to Further reduce the current to 0.05 A and continue to charge. If in the next 2 hours, the voltage remains the same – to stop to charge!
To close the lid. For greater reliability to withstand the battery about 12 hours. Then begin to operate. The battery is ready to go!
During maintenance of the battery can not forget about their own safety. You should strictly observe the elementary rules of precaution. Battery contains sulfuric acid and flammable explosive gas, while working to stay away from open flames.
In the process of operation and maintenance of the battery, its surface is better cleaned with a cloth dampened with ammonia or a solution of water with baking soda. Especially effective it helps when the surface of the battery enters the electrolyte.
Advice 2: How to measure the current the charger
The charger can charge the battery almost the same current or to dynamically change it during the set capacity. The inclusion in series with the battery ammeter even with a very small internal resistance can disrupt the charging mode. Come to the aid of a special contactless device.
The necessary device can be called in different ways: clampmeter, non-contact ammeter, clamp on meter, etc. All of these names are synonyms. Choose clampmeter in which the element sensitive to the magnetic field produced by the conductor is an inductor and Hall sensor. It differs coil that responds not only to AC but also on the constant field, and then clamps him capable of measuring in a contactless manner and a constant current.
The limits switch on the instrument select the range that most closely matches the intended charge current. Its estimated value is stated in the instructions to the charger or directly on the housing of the latter. Click on the lever clampmeter, and the halves of the magnetic core will disperse. Place between one of the conductors that are traversed by the charging current. Do not place both the conductor, because then their fields will be mutually compensated for, and the clamp meter will show zero even when a significant current.
Close the magnetic circuit and connect the charger. You will immediately see the current value on the display. At the same time turn on the stopwatch. Write in the table the readings on both instruments. Share specified in the instructions to the charger duration of charge cycle into several intervals and with such frequency continue to record readings from both devices in the table.
When the charge is complete, turn off all devices, including the charger itself, disconnect battery, and then build a graph of charging current against time. For time select horizontal coordinate, and amperage - vertical. If we now show this graph to a specialist, he will be able to say much about literacy as charging algorithms chosen by the designers of the deviceand the condition of the battery. Maybe the last needs to be replaced or restored using special equipment.
Do not short circuit the battery. Note that some chargers are made for transformerless scheme, so do not touch the terminals while charging.