Battery FAQ

1.Q:How to connect Bluetooth after buying a Bluetooth battery?

  • A:Step 1,The mobile phone scans the QR code on the battery to download the Xiaoxiang Electric APP

  •      Step 2,Log in and register the Xiaoxiang Electric APP

  •      Step 3,Scan the QR code through the Bluetooth list/scan the QR code icon in the upper right corner/search the Bluetooth number in the upper right corner to connect.

  •      Step 4,After the connection is successful, bind the device

2.Q:The LCD display capacity is not satisfactory when the 12V battery and 24V100Ah battery are fully charged.

  • A:  The LCD they use is a voltmeter, and he shows the amount of electricity according to the voltage. Due to the characteristics of lithium iron phosphate batteries, the voltage will drop after the battery is fully charged (the normal voltage drop range is 3.35V-3.45V), generally we calculate it as 3.4V.A drop in voltage causes the percentage of capacity shown by the voltmeter to drop, but in reality the battery is still fully charged.

  • You can refer to our test data

3.Q:The size of the terminal

  • A:Terminal aperture used for cell stud: 6.5mm, nut: M6

         Lead to lithium output terminal aperture: 8.5mm, nut: M8

4.Q:The size of the battery cable

  • A:The connection wire used for 100A current

Conductorstructure/outer diameter

Cross-sectional area(mm²) Conductor outer diameter(mm) Insulation thickness(mm) Complete the outer diameter(mm) Conductor resistance(Ω/km.20℃) Current rating(A) Maximum current(A)
3200/0.08*8.5 16 5.23 1.64 8.5 1.403 128 300

5.Q:The battery supports the maximum number of series connections and voltages

  • A:Up to 16 strings in series, with a maximum standard voltage of 52.8V.

6.Q:Can the battery be connected in series and parallel before charging?

  • A:Yes

7.Q:The charging voltage of the battery, what kind of charger is needed

  • A:12.8V uses a 14.6V charger  /  25.6V uses a 29.2V charger  /  52.8V uses a 58.4V charger

  • The charger requires the use of a lithium iron phosphate charger

8.Q:LiFePO4 batteries cannot be charged or discharged

  • A:1. The battery enters the protection state: it can be activated with a small current (5-10A). (Only for short-circuit protection, discharge over-current protection...)

  •    2. Ambient temperature protection: the ambient temperature is too high or too low, (need to be replaced to a temperature environment suitable for battery operation)

  •    3.Charge and discharge high temperature and low temperature protection, (stand still, wait for the temperature to be normal) (special circumstances: NTC is damaged, NTC needs to be replaced, NTC interface plugged in wrong or loose, plugged back into place and fixed steadily.) 

  •    4.The smart BMS switch function is not off: customers need to connect to Bluetooth to keep online, and we will remotely turn off the switch function

  •    5.False soldering of connecting lugs: no solution (unless the customer has professional equipment, laser welding)

  •    6.The power line of the collection line falls off: a soldering iron is needed to solder it back

  •    7.If the grip of the collection cable port is loose or falls off: just plug it in

9.Q:The charging voltage does not reach the upper limit

  • A:1. High cell voltage: it is normal for the charging voltage difference to be below 200mV, and the smaller the static voltage difference, the better.Generally, the normal range is below 10mV, and too large the voltage difference will lead to undercharging and affect the life of the battery pack

  • Solution: Balance, if the voltage difference is not large 20mV, you can use a small current charge and discharge to adjust it slightly (1-3A)

  • Equipment: e.g. equalizer, equalization module

  •  Note: If the pressure difference is too large, the equalization module that comes with the BMS is basically useless (the current BMS).

  •      2.The upper limit voltage is generally only reached at the moment of full charge, and devices that do not record data generally cannot capture this moment.When the upper limit voltage is reached, the voltage will drop rapidly, and when the cell voltage drops to about 3.5V, it will slow down until it is completely static to 3.3-3.4V, which will cause an illusion that the charging voltage does not reach the upper limit voltage we are talking about, and it feels that it is not fully charged.