1. First, unplug the motor and use a metal wire (a thin copper wire the size of a hair like that of floral wire) to instantly short the positive and negative poles. If there is sparking, the battery is normal; If there is no spark, the battery power is insufficient or the battery is broken. The size of the spark indicates the size of the battery. If the wire (a single copper wire) is pulled out by a simple touch, the battery has enough power. If there is no problem with the battery, the problem should be with the generator.
2. Car owners can observe battery usage themselves. Nowadays, the battery of many car models has an observation hole, also called an "electric eye", which is usually located in the upper right corner of the battery. The condition of the battery can be judged by observing the color change of the battery.'electric eye'. ".
If the color inside the "electric eye" is green, it means that the battery is in good condition and there is a problem with the engine; if it has become white, it means that the battery is about to be discharged and needs to be replaced in time
Detailed information
Faults. common in electrical systems:
1. The battery discharges itself after it is fully charged and not used, the power reduction phenomenon is mainly caused. by impure battery electrode materials, impure electrolyte, too high storage temperature or the battery has been left unused for a long time, sulfuric acid flows, and a potential difference occurs between the upper and lower parts of the plate
2. The battery electrolyte is consumed too quickly, which may be related to uprevent leakage and overflow caused by cracks in the casing and sealing glue, excessive charging current, bumpy roads, etc.
3. The charging system is not charging, which means the charging light does not turn off when the engine is running at medium or high speed. The main reasons are that the generator drive belt slips or breaks, the circuit is open or shorted, the regulator is damaged, or the generator cannot produce electricity.
4. Charging current is too low In addition to poor line contact and transmission belt slippage, it is also related to poor brush contact, commutator or deformed and partial surface oil. short circuit or open circuit of the rotor or stator winding.
The charger fuse may be blown. The reverse current of the reverse load is quite large. In order toTo protect the charger, a fuse is installed on the output part for protection. Check the fuse.
Partial short circuit of the quality plate
Theoretically speaking, if it is lower than 9.5 volts, it will not be able to ignite, and if it is lower than 10.5 volts, it will not be easy to ignite. Generally, it cannot be lower than 11.5 volts. It needs 12 volts to be normal after ignition, because the generator starts charging the battery after ignition.
I am a battery specialist. The situation you mentioned is caused by lack of fluid in the battery. Distilled water should be added (remember it should be distilled water and not electrolyte). Also, it depends on the age of your battery. If it is more than 3 years old, it has virtually no repair value. If the battery is deformed, you can only replace it with a new one!
Charge with a neckrant of one tenth of the rated capacity until the battery temperature increases significantly and observe if the network boils. If there are still no bubbles, but the battery can still be used, don't worry about it for now. Today's batteries have a sealed structure, making it difficult to replace individual cells, so there is no need to worry about this. .Repair recommended.
Nowadays, dry batteries are mainly used. Once water batteries are used in large tricycles or boats, most people will not repair them for you. It is recommended to replace them with new ones.