1,Check whether the mobile phone positioning and Bluetooth switch is on.

2, in the mobile phone settings,bluetooth turn interface can search the bluetooth device number, if bluetooth app can not search the bluetooth device number, may be bluetooth app related permissions are restricted, need to open the corresponding permissions restriction, or bluetooth app version problem,please contact customer service.

3、Mobile phone settings, Bluetooth on interface and Bluetooth APP can't search Bluetooth device number,please confirm whether BMS is activated, through charging and discharging, key, key switch, communication, etc. to wake up the BMS in connecting Bluetooth.

4、Whether the BMS is closed in the iron box, the Bluetooth signal is interfered, the effective connection distance is within 2 metres, and whether it can be connected beside the iron box.

5, unplug the BMS collection line end B + line, let the BMS re-power, such as the BMS working indicator does not light, may be BMS has been damaged, such as the working indicator light in the search for bluetooth device number in the connection

1、When parallel connection, you need to set the board number in the upper computer to distinguish the communication address of each BMS.

2、RS485 and CAN support parallel communication, UART does not support parallel communication.

3、Whether to use our communication module, other communication modules may have compatibility problems.

4、Confirm whether the communication wiring is correct

5, RS485 serial port number, baud rate, CAN device, device index, CAN channel, baud rate is correctly selected.

1、Check whether the BMS is over-discharge protection, if over-discharge protection, can only charge to wake up the BMS.

2、Confirm whether RS485 and CAN communication is normal, cross-verification.

3、Confirm whether BMS can be charged and discharged, if not, the probability of BMS has been damaged, contact customer service to deal with.

1、Confirm whether the driver of UART communication module is installed.

2, the host computer communication settings: confirm the serial port number, baud rate (default 9600) is selected correctly.

3, measure the BMS UART port RX, TX to ground voltage is 3.2V-3.3V (not connected to the UART line for measurement).

4, check whether the RX, TX, GND communication line is reversed, whether the line is loose.

5, UART communication can only point-to-point communication, not point-to-multiple communication.

1, RS485 communication module driver is installed.

2, the host computer communication settings: confirm the serial port number, baud rate (default 9600) is selected correctly.

3、Measure whether the communication line between A and B matches the terminal resistance 120 ohm or 1K resistance, which needs to be measured with power off.

4, measure the BMS RS485/CAN port of A, B on the isolated ground (ABGND) voltage is 2.4V-2.6V (not connected to the RS485 communication line for measurement)

5、Check whether the RS485 A and B communication lines are reversed or loose.

6, RS485 communication can be point-to-point, point-to-multipoint communication, confirm whether the BMS board number address is modified, if it has been modified, you need to select the appropriate board number to communicate (default 1 board).

7, RS485 communication module and the host computer communication compatibility issues (customer's own RS485 communication module)

1、Confirm whether the CAN box communication module driver is installed.

2、Confirm whether the communication settings of the upper computer: CAN device, device index, CAN channel, baud rate (default 250K) are selected correctly.

3、Measure the CAN-H and CAN-L communication line between the matching terminal resistance 120 ohm or 1K resistance, need to power off to measure.

4, measure the BMS RS485/CAN port CAN-H, CAN-L on the isolated ground (ABGND) voltage is 2.4V-2.6V (not connected to the CAN box communication harness to measure).

5、Check whether the CAN box communication wires CAN-H and CAN-L are reversed and loose, and whether the CAN box communication status indicator is on.

6、CAN box communication can be point-to-point or point-to-multiple communication, confirm whether the BMS board number address is modified or not, such as modification needs to select the corresponding board number in order to communicate (default board No.1).

7, CAN box communication module and the host computer compatibility issues (support Zhou Ligong CAN box communication).

1、After overcharging, BMS still has charging current, remove P-, sampling line, adjust the multimeter to diode, put the black pen on the P-end, put the red pen on the B-end, measure the value between B- and P-, if there is 0.4 voltage or so, the charging MOS has been broken.

2、After over-discharge, BMS still has discharge current, remove P-, sampling line, set multimeter to diode, black pen on B-end, red pen on P-end, measure the value between B- and P-, if there is 0.4 voltage or so, the discharge MOS has been broken.

3、No overcharge, overdischarge protection, remove the P-, sampling line, use a multimeter to measure whether B- and P- between the full conduction, such as full conduction, charge and discharge MOS or TVS tube has been broken.

1、BMS zero-drift current setting value is modified, involving BMS parameter setting please consult customer service.

2、Confirm whether the load interference, in the host computer or Bluetooth APP manually disconnect the discharge MOS whether the zero-drift current jump, such as zero-drift current still exists, confirm whether the BMS zero-drift current setting value has been modified or caused by the interference of external environmental factors (such as temperature, electromagnetic field, radiation, etc.)

3、Cross-verify the BMS under the same condition.

1, NTC default inserted into the BMS interface NTC A (or NTC-1) interface,check if interface is inserted correctly,if contact is good?

2、Measure whether the NTC internal resistance is normal (NTC internal resistance at room temperature is about 8-11K)

3、Check whether the NTC probe and wiring harness are damaged.

4、Check whether the number of NTCs set by BMS matches the actual number.

1, MOS temperature protection value default 100 ℃, when triggered MOS temperature protection, charge and discharge MOS will shut down, cut off charging and discharging.

2、if Report MOS temperature failure, need to wait for the MOS temperature to reach the recovery value to resume charging and discharging.

3、Confirm whether the BMS is charging and discharging over the rated power, and the MOS tube is overloaded, resulting in high temperature rise of the MOS tube.

4、Confirm whether the working environment temperature is too high, which will easily trigger the MOS temperature failure.

5、If the MOS temperature shows -40℃, the probability of MOS temperature detection circuit is abnormal, contact customer service to deal with.

1、SOC average accuracy: ≤10%.

2, the first power-up needs to set the rated capacity of the battery pack in the Bluetooth APP or the host computer software, a cycle of charging and discharging, the BMS automatically calibrate the SOC, if the battery pack capacity value is wrong, it will lead to an error in the logic of the SOC calculation, and inaccurate SOC display.

3, whether the battery pack is applied for a long time with shallow charging and discharging, the SOC error is proportional to the time, there is no regular charging and discharging cycle, the SOC is not corrected by full charging or full discharging, which leads to the SOC error and inaccurate display.

4、SOC rises when discharging, the BMS B- and P-terminal harnesses are connected in reverse, the correct B-terminal is connected to the total negative terminal of the battery pack, and the P-terminal is connected to the negative terminal of the charger or load.

5、The consistency of the battery pack is poor, the internal resistance of a string of batteries is different, due to the trigger of overcharging or over-discharging, the SOC end correction is 100% or 0%, it is necessary to replace the batteries with large internal resistance.

6、BMS collects abnormal voltage and current of single unit, which leads to inaccurate calculation of SOC, probability BMS has been damaged, contact customer service to deal with it.

1, to confirm whether the BMS selection is reasonable, for example: two-wheeled electric car has 55A current-limiting controller, the correct selection of BMS current needs to ≧ 55A, if the BMS current <55A, the electric car in the process of riding may be a sudden high-current discharges, it will trigger the BMS overcurrent protection, power-off protection.

2、Connect with Bluetooth APP to check whether the configuration parameters such as undervoltage, overcurrent discharge and temperature are reasonable.

3、Connect the Bluetooth APP to check whether the fault is triggered, and the fault information can be used to check the problem point.

4、The consistency of the battery pack is poor, the internal resistance of a string of cells is large, easy to trigger the over-discharge protection, the BMS judge the voltage of the lowest string of cells for over-discharge protection, cut off the discharge MOS, stop discharging.

1、Ensure that the mobile phone positioning and Bluetooth switch are turned on.

2、Ensure that the BMS has been working normally, you can press the button of WiFi module for 2~3 seconds to activate the BMS.

3、Pull out and re-insert the B+ line of the capture terminal to restart the BMS, and then search for the WiFi module device number.

4、Is it restricted by APP authority, uninstall and install it again, then search the WiFi module device number.

5、Cross-verify with another mobile phone to see if it can search WiFi module device number.

1、Connection interface appears prompt 502:Bad Gateway, maybe the server is under maintenance, you need to wait for the server to connect again after maintenance.

2、WiFi module device shows offline, confirm whether BMS has been hibernated, hibernation will disconnect the WiFi module power supply. You can wake up the BMS by charging/discharging, pressing key, key switch, RS485/CAN communication, etc., and then connect the WiFi module again.

3、WiFi module device shows offline, re-plug the B+ wire of the BMS collection line end, and let the BMS re-power on. If the BMS working indicator light is not on, the BMS may be damaged; if the working indicator light is on, connect the WiFi module again.

4、Cross-verify the WiFi module or cross-verify the BMS.

5, whether the WiFi module is disconnected from the network, need to ensure that the WiFi module connected to the WiFi wireless network.

1、WiFi module device add failure, re-plug the WiFi module, or press the button of WiFi module for 5~10 seconds to restart the WiFi module, and exit the APP and then reconnect the WiFi module.

2、Make sure you have turned on WiFi and mobile phone positioning function.

3, Make sure the WiFi 2.4GHz and WiFi password are correct.

1、In the remote monitoring login interface, click "Forgot Password", enter the "Retrieve Password" interface, enter the corresponding information.

2、Contact customer service.