Does your electric bike battery has BMS function, if with BMS function,had better to always make this red button to be “down”(Don’t be up)… (After testing, LCD-008HU is no problem for working with the battery without BMS function.)
This red button be “up”, when ride, press brake lever,it will reverse charging battery.
It is necessary to confirm whether the lithium battery has BMS function. If the electric bike battery has BMS function, if the battery is full, use the reverse charging function of the controller, and the battery protection will not absorb. Then the reverse current of 70V, 80V and 110V will be reverse charged to LCD and controller.
The controller has a large capacitance, which can absorb the counter current. But LCD does not have a large capacitance, it will act on the LCD switching power supply and burn the switching power supply.
Other LCD-003 use resistance step-down power supply, reverse charging, resistance can step-down, will not damage the switch.
But for the LCD with USB port, the USB module will be burnt if the counter charging exceeds 70V
Because there are a lot of things that need to be lit for this color screen instrument. It uses the switching power supply. If the reverse charging exceeds 70V, the switching power supply will be burnt out
If your lithium battery has BMS, can’t make that red button to be “up”(three button switch). (red button should as “down” as below picture)
Had better Not use this red button. Thanks.
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