JIKONG Smart Battery Management System (BMS) Instruction Manual

1. Produttu Finituview

The JIKONG Smart Battery Management System (BMS) is designed for large-capacity series lithium battery packs. It provides comprehensive management and protection features to ensure the safety and longevity of your battery system.

Key functionalities include voltage acquisition, high-current active balancing, overcharge, over-discharge, overcurrent, over-temperature protection, coulomb metering, Bluetooth communication, and optional GPS and heating functions. This BMS is compatible with various battery chemistries such as lithium iron phosphate (LiFePo4), ternary lithium (Li-ion), and lithium titanate (LTO) batteries.

The active balancing technology, with independent intellectual property rights, achieves a continuous balance current of 1A or 2A, significantly improving battery consistency, extending battery range, and delaying aging. The compact design, ease of operation, and full functionality make it suitable for a wide range of applications, including small sightseeing vehicles, mobility scooters, shared cars, high-power energy storage, base station backup power supplies, and solar power stations.

2. Funzioni chjave

• **Active Equalization:** 1A or 2A continuous balance current for superior cell consistency.
• **Real-time Monitoring:** LED Bluetooth status indicator and APP remote operation.
• **Accurate Data Acquisition:** High-precision voltage (±3mV) and current acquisition.
• **Comprehensive Protection:** Overcharge, over-discharge, overcurrent, short circuit, over-temperature, and low-temperature protection.
• **Communication Interfaces:** Support for RS485 (optional), CAN (optional), and GPS communication.
• **Smart Functions:** Heating function (optional), battery pack parallel function (optional), ACC detection function (optional), alarm function (optional), and intelligent sleep mode.
• **Information Display:** Support for external information screens.
• **Data Logging:** Accurate time logging.

3. Specificazioni

3.1. General Parameters

3.2. Default Parameters (Example for LiFePo4)

Note: Default parameters may vary slightly based on battery type (Li-ion, LiFePo4, LTO). Refer to the APP for specific settings.

4. Setup è Installazione

4.1. Cuntenutu di u pacchettu

4.2. Schema di Cablaggio

The JK-BxA8S-20P series protection board is suitable for 3-8 series lithium battery packs. The specific wiring method depends on the number of cells in your battery pack. Always ensure correct polarity and secure connections.

4.3. Interface Definitions

The BMS features various interfaces for communication, sensors, and control. Refer to the following diagrams for connector types and pin definitions.

For detailed pinouts and connector types, please refer to the "5.2. 产品连接器、LED 定义(Product connector, LED definition)" section in the PDF manual.

5. Operation Instructions

5.1. APP Installation and Initial Setup

1. **Download APP:**
   • **iOS:** Search "JIKONG BMS" in the APP Store.
   • **Android:** Search "JK BMS" in the Google Store. (Android Version 7 minimum is required).

   

2. **Hardware Connection:** Connect the protection board and battery pack according to the wiring diagram (Figure 10). Ensure the last power cord is connected to the main positive pole. The total battery pack voltage must be greater than 20V (Default BMS) or 10V (4S BMS) before startup.
3. **BMS Activation:** Use the display activation button or an additional switch to activate the BMS. Alternatively, connect a charger (charger voltage > battery voltage by 2V) to activate the BMS.
4. **Connect via APP:**
   • Attivate u GPS è u Bluetooth nant'à u vostru telefuninu.
   • Open the APP, click the top left corner to search for devices.
   • Click on the device name to connect. The default password is "1234".
5. **Parameter Setting (First Start-up):**
   • Setting parameters requires a password. The default parameter setting password is "123456".
   • Set the number of units (strings) and battery type (LiFePo4, Li-ion, LTO).
   • Refer to the "Instructions for Setting Protection Board Parameters" in the full PDF manual for detailed parameter configuration.
6. **Check Battery Status:** After setting parameters, return to the real-time status page. Verify that there are no error messages and that the battery status is normal. Blue indicates the highest voltage, red indicates the lowest voltage.

5.2. Key Functions and Usage

Equalizazione attiva

The BMS actively balances cell voltages by transferring energy from high-voltagcellule e à bassu vulumetage cells. This process improves battery consistency and extends battery life. Users can set the balance trigger pressure difference (mV) in the APP. The default balance current is 1A/2A. It is recommended that the balance current does not exceed 0.2C of the battery capacity. The balancing function can be turned off via the BMS control page in the APP if not needed.

Heating Function (Optional)

If your BMS model includes the "Heat" function, it supports an optional heating feature for low-temperature environments. This prevents reduced battery activity and ensures proper charging/discharging. The heating current is 20A. Users can control this function via the APP. It is recommended to use a normally closed temperature switch (45°C to 65°C) in series with the heating circuit for secondary protection.

• **Heating on Condition:**
  1. Battery temperature is lower than the low-temperature protection temperature for charge.
  2. Connecting a heating film will activate heating via the APP, consuming battery power.
  3. Heating through the charger is related to the protection board hardware and charger. Confirm technical status before ordering.

Alarm Function (Optional)

The BMS can be configured with an alarm function to alert users to safety risks such as over-temperature, overcharge, or over-discharge conditions.

Battery Pack Parallel Function (Optional)

For energy storage applications, the BMS supports parallel battery pack functionality. This requires synchronous use with parallel modules and disabling the "charging current limiting" function in the APP.

ACC Detection Function (Optional)

This function enables discharge and can be implemented by applying a voltage (20V-100V) between ACC+ and ACC- or by short-circuiting them. A charger detection function (C_detect+ and C_detect-) is also available for enabling charging, connecting to the 12V voltage signal output of the charger.

Communication Functions (Optional)

The BMS supports optional CAN and RS485 communication. Users can select these options via the APP's BMS control page. Address and communication protocol can be configured based on requirements. Refer to the Jikong Protection Board Communication Protocol document for details.

Intelligent Sleep

The intelligent sleep function is standard. It allows the BMS to enter a low-power standby state (charging/discharging current less than 1A for 26 consecutive hours) to reduce self-consumption. The BMS can be reactivated by pressing a button or connecting a charger.

6. Mantenimentu

Regular maintenance of your JIKONG Smart BMS ensures optimal performance and longevity of your battery system.

• **Firmware Updates:** Check the JIKONG official website or APP for any available firmware updates to ensure your BMS has the latest features and bug fixes.
• **Connection Integrity:** Periodically inspect all wiring connections, especially the balance cables and main power connections (B- and P-), for any signs of corrosion, looseness, or damage. Secure any loose connections.
• **Environmental Conditions:** Ensure the BMS operates within its specified temperature range (-30°C to 70°C). Avoid exposing the unit to excessive moisture or extreme temperatures.
• **Cleaning:** Keep the BMS unit clean and free from dust and debris. Use a soft, dry cloth for cleaning. Do not use liquid cleaners.
• **Battery Health Monitoring:** Regularly monitor battery cell voltages and overall pack health via the mobile APP. Address any significant cell imbalances promptly.

7. Risoluzione di prublemi

7.1. Prublemi cumuni è suluzioni

• **BMS Does Not Turn On:**
  1. Ensure the last "B+" line of the cable is connected to the positive pole of the battery.
  2. Start up after charging and ensure the charger voltage hè più grande di 4V di u vulume di a batteriatage.
  3. Verificate se u caricatore hà vulumetage uscita.
• **Inaccurate Voltage Readings:**
  1. Measure the actual total pressure of the battery pack with a multimeter and input this value into the "voltage calibration" setting on the parameter setting page in the APP.
• **Inaccurate Current Readings:**
  1. Ensure that both B- and P- of the protection board are connected with two 7AWG wires in parallel. Failure to do so may lead to current errors.
  2. Misura u currente attuale di a batteria cù un clamp meter and input this value into the "current calibration" setting on the parameter setting page. Higher actual current leads to higher calibration accuracy.
• **Inaccurate Capacity:**
  1. Initial capacity estimation based on monomer voltage when the protection board is first powered on may be inaccurate.
  2. To calibrate, fully discharge the battery pack to its cut-off voltage, then fully charge it without interruption.
• **Designed String Number Inconsistent with Actual String Number:**
  1. Check if the "unit quantity" in the parameter setting is correct.
  2. Se ùn ci hè micca voltage in two or more strings in the middle, check if the acquisition cable has fallen off.
• **Short Circuit Protection Triggered:**

  If short circuit protection is triggered during initial charging or connecting a load, increase the short circuit protection delay in the APP. This can compensate for peak currents from chargers or large capacitances in loads. Ensure external wiring is correct and free from actual shorts.

8. Cunsiglii d'utilizatori

• **Initial Setup Patience:** Take your time during the initial setup, especially with wiring and APP parameter configuration. Double-check all connections before powering on.
• **Regular Monitoring:** Utilize the mobile APP to regularly monitor your battery's health, especially cell voltages and temperatures. This proactive approach can help identify potential issues before they become critical.
• **Customization:** Explore the APP's parameter settings to fine-tune the BMS behavior to your specific battery chemistry and application needs.
• **Safety First:** Always prioritize safety. Ensure proper insulation for all connections and avoid operating the BMS in conditions outside its specified environmental limits.

9. Certificazioni

The JIKONG Smart BMS holds the following certifications, ensuring compliance with international standards for safety and quality:

• CE
• FCC
• RoHS

10. Garanzia è Support

For warranty information and technical support, please refer to the official JIKONG website or contact your vendor. Keep your purchase records for any warranty claims.

Un manuale d'usu dettagliatu in furmatu PDF hè dispunibule per scaricamentu: JIKONG BMS User Manual (PDF).