What is the fault of Yutong auxiliary battery?

1 First, check whether there is a red light when the charger is plugged into the 220V power supply, and whether the rectifier circuit with the red light as the power supply is normal.

2. Check the voltage of the output socket with a multimeter, and check whether the measured data is consistent with the nominal voltage on the box. For example, there are four batteries, which should be 48V, and the voltage of the charging box is about 10V higher than that of the batteries. At 58V, the output is normal. If it is 4 ~ 5V lower, it will not be charged. If the charging box is normal, then focus on the battery.

3. Check the tram battery, measure the voltage of the charging pile of the battery car with a multimeter, adjust the meter to DC 50V, and insert the black and red probes of the multimeter into the left and right piles (positive and negative collisions are strictly prohibited), otherwise it will burn out the probes. If the four batteries have no voltage at all, the battery wires are broken, including the fuse. At this point, you should open the battery cover and directly measure the battery. If the battery inside is normal and there is no electricity outside, you need to check this.

4. If the battery is only about 40V, then there is something wrong with the battery and it needs to be measured one by one. If the battery is lower than 10.8V, the battery is useless. If a bad battery is connected in series in the circuit, it will affect the charging of other batteries. If the battery is used for two years, the whole battery group is aging. You can go to the parking lot and exchange it for a broken one. Choose one from the old battery, 12V, and make up some small money. Later, you can come to his shop to change it.

5. The battery can only be recharged if it is broken, but it should not be replaced.

First, check whether the charger is normal. Check whether the output voltage of the charger is normal. There must be something wrong with the battery.

You can also connect a multimeter in series in the circuit to check whether there is output current. Once there is current, it can basically be confirmed that the battery has been scrapped and replaced; If there is no current, it is necessary to carefully check whether the connecting wires between batteries are disconnected and whether the connecting wires inside the battery socket are off-welded.

First, check the charger, what color is the indicator light, and whether the charger fan is rotating. If the charger doesn't light up or doesn't turn, there is something wrong with the power supply.