JIKONG JK BMS B2A24S20P Bluetooth Battery Management System User Manual

1. Introducció

The JIKONG JK BMS B2A24S20P is an intelligent battery protection board designed for large capacity series lithium battery packs. It offers comprehensive management features including voltage acquisition, high current active balancing, overcharge, over-discharge, overcurrent, over-temperature protection, coulomb metering, Bluetooth communication, and optional GPS remote functionality. This BMS is suitable for LiFePO4, ternary lithium, and LTO battery types.

1.1. Escenaris d'aplicació

This protection board is versatile and can be widely used in various applications, including:

• E-bikes, Electric Tricycles, Low Speed Quads
• Forklifts, Cleaning Cars, Tourist Cars
• Industrial Drones, Scooters
• RV Energy Storage, Power Banks, General Storage Batteries

2. Configuració i instal·lació

2.1. Llista d'embalatge

Before installation, please verify that all components are present and undamaged:

• BMS *1
• NTC *1 (Temperature Sensor, 400mm long)
• Balance Wires *1 (750mm long)
• Switch *1 (500mm long)
• Caixa d'embalatge * 1

2.2. Mètode d'instal·lació

Handle the packing box and the protection board gently. Before unpacking, check for any signs of impact or damage. The JK-BxAxxS-15P/20P series protection board is suitable for 7-24 series lithium battery packs. The specific wiring method varies depending on the number of cells in the battery pack.

Comprovació de seguretat important: Before powering on the protection board, double-check that the balance wires are correctly connected and that the P- and B- terminals are properly connected. Ensure the protection board is securely fixed to the battery cells. Incorrect connections can lead to abnormal operation or damage.

The diagram above illustrates the connections for the BMS. Ensure that the load, charger, temperature probe, and all balance wires (B+, B1, B2... up to B24, B-) are connected according to the specified terminals. The heating interface and charge indication inputs are also shown.

2.3. Definició de la interfície

The BMS features a rich set of interfaces to meet various daily needs, allowing for multiple communication modes simultaneously.

The following table details the pin definitions for the main connectors:

3. Funcionament

3.1. APP Installation and Device Activation

The JIKONG BMS comes with a mobile APP for Android and iOS. To install the APP, scan the QR code below. Android Version 7 or higher is required.

The protection board does not have a power-on control switch. It is designed for charging activation. After assembling the battery, connect the charger (charger voltage ha de ser 2 V superior al volum de la bateriatage) to activate the BMS. Alternatively, if you have an optional display screen and button, you can activate the BMS by inserting the cable into the display interface and pressing the button.3.2. Active Equalization

The BMS utilizes active equalization technology to transfer energy from higher voltage cells to lower voltage cells, ensuring voltage balance with minimal energy loss. The continuous balance current is 1A/2A.

To use the balancing function, set the battery parameters in the APP. After selecting the battery type, configure the number of cells, battery capacity, trigger equalization differential pressure (default is usually fine), voltagcalibratge electrònic i calibratge actual.

You can set the balance trigger pressure difference (mV) via the APP. When balancing is enabled, it activates automatically if the voltage difference between any two battery strings exceeds the set value, and deactivates when it falls below the set value. It is recommended that the balance current does not exceed 0.2C of the battery capacity. If not needed, the balancing function can be turned off in the BMS control page of the APP.

3.3. Multi-screen Display and Data Connection

The JIKONG BMS supports multi-screen display and data connection, allowing you to monitor battery information through various interfaces:

• APP mòbil: A personal lithium battery steward installed on your mobile phone (iOS/Android/HarmonyOS). All kinds of information are clear at a glance.
• Programari de PC: For detailed monitoring and control on a computer.
• JIKONG 4.3LCD: An external display screen for real-time data.

3.4. Funció de calefacció

The BMS supports an optional heating function to warm the battery at low temperatures using a resistance heater or heating film. This prevents charging/discharging issues due to reduced battery activity in cold conditions. The designed heating current is 4A.

You can enable/disable this function via the APP's BMS control page based on ambient temperature. It is recommended to use a temperature control switch (45°C to 65°C normally closed type) in series with the heating circuit as a secondary protection to prevent thermal runaway.3.5. Communication and GPS

The BMS supports optional CAN/RS485 communication. You can select CAN or RS485 for multiplexed ports on the APP's BMS control page. Address and communication protocols can be configured as needed. The BMS also reserves a GPS port for optional GPS devices, allowing for battery location tracking.

4. Maintenance and Protection Functions

The JIKONG BMS provides comprehensive protection features to ensure the safety and longevity of your battery pack. These functions are standard and can be configured via the APP.

4.1. Sobrevoltage Protection (Charge)

The BMS includes charge overvoltage protection. You can set the single cell overcharge protection voltage and recovery voltage in the APP. If any cell's voltage exceeds the set overvoltage protection during charging, the BMS will stop charging. Charging resumes when all cell voltages drop below the recovery voltage.4.2. Undervoltage Protection (Discharge)

Descàrrega subvoltage protection is standard. Set the battery undervoltage protecció voltage, recovery voltage, and automatic shutdown voltage in the APP. If any cell's voltage drops below the protection voltage during discharge, the BMS will stop discharging. Discharge resumes when all cell voltages rise above the recovery voltage. If any cell's voltage falls below the automatic shutdown voltage, the BMS will shut down automatically.4.3. Overcurrent Protection (Charge & Discharge)

The BMS features charge and discharge overcurrent protection. You can set the continuous current, overcurrent delay, and overcurrent release time in the APP. If the current exceeds the set continuous current for the specified delay time, the BMS will trigger protection and stop charging/discharging. Operation resumes after the overcurrent release time. Note: The maximum continuous discharge current cannot exceed the nominal current (150A/200A).4.4. Over-temperature Protection

Charge and discharge over-temperature protection is included. Set the over-temperature protection and recovery temperatures in the APP. If the BMS detects a temperature above the set protection value, it will stop charging/discharging. Operation resumes when the temperature drops below the recovery value.4.5. Low Temperature Protection (Charge)

Charge low temperature protection is standard. Set the low temperature protection and recovery temperatures in the APP. If the BMS detects a temperature below the set protection value, it will stop charging. Charging resumes when the temperature rises above the recovery value. For extremely cold areas, using the heating function is recommended.4.6. Short Circuit Protection

Short circuit protection is standard. You can set the short circuit protection delay (µs) and recovery time (S) in the APP. If a short circuit occurs during charging or discharge, the BMS will activate protection. If the protection is triggered upon initial connection of a charger or load, increasing the delay time might resolve it, especially if large capacitors in the load cause high instantaneous currents.4.7. Discharge Precharge Function

The BMS includes a discharge precharge function, with a default precharge time of 5 seconds. This can be enabled or disabled via the APP. Setting the precharge time to 0 disables the function.4.8. Emergency Switch

A standard emergency switch function is available. If issues like over-temperature, over-discharge, over-charge, or cell string drops occur during normal use, activating the emergency switch in the APP's BMS control page will allow the BMS to continue charging/discharging for 30 minutes. This provides an emergency usage period, preventing situations like being stranded on the road.4.9. Intelligent Sleep

The intelligent sleep function is standard. You can enable or disable it in the APP. Its purpose is to reduce the BMS's self-consumption by closing the protection board when it's in standby (charging/discharging current less than 1A for 26 consecutive hours). To reactivate, press a button or connect a charger.

5. Solució De Problemes

If you encounter issues with your JIKONG BMS, consider the following:

• Charging/Discharging Stops: Check the APP for active protection alerts (e.g., overvoltage, minvartage, overcurrent, over-temperature). Address the root cause (e.g., adjust charging parameters, reduce load, allow cooling).
• Protecció contra curtcircuits: If triggered, ensure all external wiring is correct and free of shorts. If it occurs during initial connection of a charger or load, try increasing the short circuit protection delay in the APP.
• BMS Not Activating: Ensure the balance wires and main power connections (P- and B-) are correctly installed. Activate the BMS by connecting a charger (voltage 2V higher than battery) or using the optional key/display activation.
• Lectures inexactes: Realitzar voltage and current calibration via the APP if readings appear incorrect.

5.1. Consells d'usuari

• Always double-check all balance wire connections before powering on the BMS to prevent damage.
• Utilize the mobile APP for real-time monitoring and parameter adjustments to optimize battery performance.
• In cold environments, consider enabling the heating function to maintain battery efficiency and prevent low-temperature protection from activating.

6. Especificacions

6.1. Característiques generals

• Indicador LED d'estat del Bluetooth
• Funcionament remot per APP Bluetooth
• Càlcul de la capacitat de la bateria
• Alta precisió voltagadquisició electrònica (±3 mV)
• Adquisició de corrent d'alta precisió
• Visualització de la pantalla d'informació de suport
• Registre de temps precís
• Support RS485/CAN (one of two)
• Support heating function
• Suport a la comunicació GPS
• Discharge precharge function
• Protecció contra sobreintensitat de càrrega
• Sobrevol de càrregatage protecció
• Protecció de càrrega per sobre de la temperatura
• Protecció de baixa temperatura durant la càrrega
• Protecció contra sobreintensitat de descàrrega
• Descàrrega subvoltage protecció
• Protecció de sobretemperatura de descàrrega
• Protecció contra curtcircuits

6.2. Main Parameters (200A Protection Board)

6.3. Dimensions del producte

The dimensions of the JK-BxAxxS-15P/20P series protection board are 162mm × 102mm × 20.4mm.

7. Garantia i Suport

7.1. Compromís de servei

The product comes with a warranty covering quality issues not caused by human factors for three years from the date of receipt. The service form includes free repair or replacement, depending on the product's repairability evaluation results.

7.2. After-Sales Process

1. Customer Application: Submit applications through official after-sales channels (email/online customer service), providing order numbers, fault descriptions, and evidence (photos/videos).
2. Devolució de mercaderies: The customer is responsible for the international logistics cost of sending the product back to China and providing the waybill number for tracking purposes.
3. Requisits d'embalatge: Ensure that the product accessories are complete and the packaging is intact to avoid transportation damage.
4. Detection and Processing: After receiving the product, our quality department will complete the inspection and inform the repair/replacement plan within 5-7 working days. Responsibility definition: Non-human damage will receive free repair/replacement, with the seller bearing the return international logistics costs.
5. Return and Tracking: After the repair/replacement passes the quality inspection, it will be sent back to the customer through logistics, and full logistics tracking information will be provided throughout the process. Time commitment: The return logistics cycle is controlled within 7-15 working days (may fluctuate due to customs clearance and other factors). Cross-border compliance: Customers need to cooperate in providing necessary customs declaration documents (such as original purchase vouchers, repair statements) to avoid customs clearance delays.

For detailed item guides and documents, please refer to the official user manual PDF available at https://manuals.plus/m/83b0a03e83a3380e2f77cb3097ec8fe4e6b7bf44c54228a924c2e38254baf989.