Step-by-Step Guide for Remote Monitoring of a Lithium Battery via External GSM Card
1. Understand System Components & Requirements:
- BMS (Battery Management System): Manages battery parameters (voltage, current, temperature, cycles, alerts).
- OBD Interface: Connects to the BMS for data extraction and programming (e.g., CAN bus, SAE J1939 protocols).
- GSM Module: Enables cellular communication (e.g., SIM800C, Quentel modules) with a SIM card and data plan.
- Remote Server/Cloud Platform: Stores and processes data (e.g., AWS, Things Board, custom server).
- Connect OBD Port to GSM Module:
- Use an OBD-II to UART/CAN converter to interface the BMS with the GSM module. In Su-vastika BMS there is a CAN protocol in the smart BMS which can interface with Su-vastika Lithium UPS and can interact with each other. The Lithium UPS start functioning according to the data received from the BMS specially for the protections.
- Power Supply:
- Power of the GSM module and OBD interface is taken from the BMS of the lithium battery
5. Set Up Remote Server:
- Cloud Platform: Configure an MQTT broker (e.g., Mosquitto) or HTTP API endpoint.
- Database: Store parameters (e.g., InfluxDB for time-series data).
- Security: Enable SSL/TLS encryption and API authentication (e.g., tokens).
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Connect Your Device
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Connection Diagram
Parameters of Lithium Battery
1.BMS ID: Identifies the Battery Management System (BMS) connected to the system.
2.Voltage: Represents the current voltage level of the battery.
3.Current: Indicates the rate of flow of electricity through the system.
4.Paralleling: Indicates whether the battery system is connected in parallel with other units.
5.SOC (State of Charge): Percentage of charge left in the battery.
6.Fault: Shows if any faults have been detected in the system.
7.Load: Displays the current power consumption or demand placed on the battery.
8.Charging: Indicates if the battery is in charging mode.
9.Discharging: Shows if the battery is in discharging mode.
10.SOH (State of Health): Reflects the overall health of the battery, including capacity loss and degradation.
11.Cycles: Represents the number of charge-discharge cycles the battery has gone through.
7. Configure Alerts & Notifications:
- Threshold Triggers: Program the microcontroller to detect BMS alerts (e.g., overcurrent) and send SMS/email via GSM.
- Real-Time Dashboards: Use Grafana or Node-RED to visualize data and trigger alerts.
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BatBot Application
8. Data Retrieval & Analysis:
- Automated Reports: Schedule server scripts to compile cycle counts, historical alerts, and health metrics.
- User Access: Develop a web/mobile app for users to download logs and adjust settings remotely.
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BMS Monitoring application on the server
1.SOC (State of Charge): The percentage of charge remaining in the battery.
2.Remaining Capacity: The remaining usable energy in the battery, typically measured in amp-hours (Ah).
3.Pack Voltage: The total voltage across the entire battery pack, which is the sum of the voltages of all the cells in the pack.
4.SOH (State of Health): Represents the overall health of the battery, accounting for wear, capacity loss, and degradation over time.
5.Cycle Count: The number of complete charge and discharge cycles the battery has gone through.
6.Battery Parallel: Indicates whether the battery is operating in parallel with other batteries.
7.Status: Real-Time status of the Battery.
- IDEAL CONDITION : If no Charging/Discharging is going ON.
7.Charging: Shows whether the battery is currently in charging mode.
8.Discharging: Shows whether the battery is in discharging mode, providing power to connected loads.
Card Descripition
1.Temperature: The current temperature of the individual battery cells. Monitoring temperature is critical to ensure the cells are not overheating, which can damage the battery and cause safety hazards.
- Difference: Temperature difference between the max and min zone.
- Bar Color: The bar with green color represents the lower value and red represents the higher value.
2.Cell Voltage: The voltage of each individual battery cell in the pack. Essential for assessing the balance and health of each cell.
- Difference: Difference between max and min cell/string voltages.
- Min Cell Voltage: The lowest voltage recorded across any of the individual cells in the battery pack.
- Max Cell Voltage: The highest voltage recorded across any of the individual cells in the battery pack.
9. Testing & Validation:
- Local Tests: Verify OBD data reading and GSM transmission using serial monitors.
- Remote Tests: Confirm server data storage and command execution (e.g., changing a voltage limit).
- Fail-Safes: Test network dropout recovery and watchdog timers.
10. Deployment & Maintenance:
- Power Optimization: Enable GSM sleep modes to conserve battery.
- Firmware Updates: Implement OTA (Over-the-Air) updates for the microcontroller/GSM module.
- Monitoring: Track data usage and server uptime.
Tools & Tips:
- GSM Modules: Use modules with MQTT/HTTP support (e.g., SIM7600).
- Security: Use VPNs or private APNs for sensitive applications.
- Protocols: Refer to BMS datasheets for custom OBD PIDs and commands.
By following these steps, one can achieve real-time remote monitoring, parameter adjustment, and historical analysis of your lithium battery system via GSM.
Su-vastika is the first company in India which has taken the Technology patent for the BMS and it has the proprietary software.
Su-vastika
Su-vastika
Su-vastika
Su-vastika
Su-vastika
