JK BMS 8S to 24S 0.6A Active Balancer 40A Smart Bluetooth BMS

Overview: JK BMS 8S to 24S 0.6A Active Balancer 40A Smart Bluetooth BMS

The JK BMS 8S-24S 0.6A 40A is designed for higher-voltage lithium battery packs ranging from 24V to 96V. Its wide cell count flexibility (8S to 24S) makes it one of the most versatile BMS units in the JK lineup, suitable for e-bikes, electric scooters, small EVs, and lower-current 48V solar storage systems where cost-effective active balancing is needed.

This smart BMS offers comprehensive battery management with Bluetooth connectivity, multiple communication protocols, and robust protection features. Whether you’re building a 48V e-bike pack or a 72V electric scooter battery, this BMS provides the flexibility and reliability you need for professional-grade battery systems.

Key Features and Specifications

• Cell range: 8S to 24S, fully app-configurable
• Voltage range: 24V (8S LiFePO4) to 96V (24S Li-ion)
• Active balancing: 0.6A continuous balancing current
• Continuous current: 40A charge and discharge
• Communication: Bluetooth 5.0, RS485, CAN, UART
• Chemistry support: Li-ion, LiFePO4, LTO
• Temperature sensors: 2 x NTC temperature probes included
• Full protection suite with dry-contact alarm output
• Compact aluminum housing for efficient heat dissipation
• Mobile app control and monitoring via Bluetooth

Active Balancing Technology

The JK BMS features 0.6A active balancing that continuously monitors and equalizes cell voltages across your battery pack. Unlike passive balancing systems that waste energy as heat, active balancing redistributes energy from higher-voltage cells to lower-voltage cells, improving overall pack performance and longevity.

This active balancing technology is particularly beneficial for larger battery packs (12S and above) where cell voltage drift can significantly impact capacity and cycle life. The 0.6A balancing current ensures cells remain matched even during extended storage periods or after partial charge cycles.

Voltage Configuration Examples

Common Battery Pack Configurations

• 8S LiFePO4 = 25.6V nominal (small solar/UPS systems)
• 13S Li-ion = 48V nominal (standard e-bike packs)
• 16S LiFePO4 = 51.2V nominal (48V solar inverter systems)
• 20S Li-ion = 72V nominal (e-scooter and small EV applications)
• 24S LiFePO4 = 76.8V nominal (high-voltage industrial packs)
• 24S Li-ion = 86.4V nominal (maximum voltage configuration)

The BMS automatically detects and adjusts to your specific cell count through the mobile app, making it simple to configure for any voltage within the supported range.

Smart Bluetooth Connectivity and Mobile App

Monitor and control your battery pack remotely using the JK BMS mobile app via Bluetooth 5.0. The app provides real-time access to:

• Individual cell voltages and pack voltage
• Charge and discharge currents
• State of charge (SOC) percentage
• Temperature readings from both sensors
• Protection status and alarm history
• Balancing activity and cell statistics
• Configurable protection parameters
• Firmware update capability

The Bluetooth connection range allows monitoring from up to 10 meters away, perfect for installations in enclosed battery boxes or vehicle compartments.

Multiple Communication Protocols

Beyond Bluetooth, the JK BMS includes RS485, CAN, and UART communication ports for integration with:

• Solar inverters and charge controllers
• Electric vehicle motor controllers
• Battery monitoring systems
• Industrial automation equipment
• Custom data logging solutions

The CAN bus protocol is compatible with common inverter brands, allowing automatic charge/discharge control based on battery status.

Comprehensive Battery Protection Features

The JK BMS provides multi-layered protection to safeguard your battery investment:

• Overvoltage protection (OVP) – per cell and pack level
• Undervoltage protection (UVP) – prevents deep discharge damage
• Overcurrent protection – charge and discharge limits
• Short circuit protection – instant cutoff
• Overtemperature protection – charge and discharge limits
• Low temperature protection – prevents cold charging
• Cell imbalance protection – alerts on excessive drift
• Dry-contact alarm output – for external warning systems

All protection thresholds are fully customizable through the mobile app, allowing you to optimize settings for your specific battery chemistry and application requirements.

Recommended Applications

Electric Mobility

• 48V and 52V e-bike battery packs
• 60V and 72V electric scooter batteries
• Small electric vehicle conversions
• Electric motorcycle and moped packs
• Golf cart battery upgrades

Solar and Energy Storage

• 48V solar storage systems with low to medium loads
• Off-grid battery banks up to 96V
• Backup power and UPS systems
• Portable power stations

Industrial and Custom Applications

• Custom 60V-72V industrial battery packs
• AGV and robotics power systems
• Marine and RV house banks
• Telecommunications backup power

Chemistry Compatibility

The JK BMS supports multiple lithium battery chemistries with pre-configured voltage profiles:

• LiFePO4 (LFP): 2.5V to 3.65V per cell – ideal for 48V solar systems and long-life applications
• Li-ion (NMC/NCR): 2.5V to 4.2V per cell – common in e-bike and EV applications
• LTO (Lithium Titanate): 1.5V to 2.8V per cell – specialized fast-charge applications

Simply select your chemistry in the app and the BMS automatically applies appropriate voltage limits and charging parameters.

Temperature Monitoring and Protection

Two NTC temperature sensors are included with the BMS, allowing you to monitor:

• Battery pack core temperature
• Ambient or BMS temperature
• Individual cell or module temperatures

The BMS can automatically limit charge current at high temperatures or completely disable charging below freezing, protecting your cells from damage during extreme conditions. Temperature thresholds are fully configurable to match your specific battery specifications.

Installation and Wiring

The JK BMS comes with a complete balance lead harness capable of supporting up to 24S configurations. The harness uses standardized connectors for easy cell connection and includes clearly labeled wires for error-free installation.

The compact aluminum housing measures approximately 130mm x 100mm x 20mm, making it suitable for installation in tight spaces. Mounting holes allow secure fastening to battery boxes or vehicle frames.

For optimal performance, install the BMS in a well-ventilated area and position temperature sensors at representative locations within your battery pack.

What’s in the Box

• 1 x JK BMS unit (8S-24S 0.6A 40A)
• 2 x NTC temperature sensors with cables
• 1 x Balance lead harness (24S capable)
• 1 x User guide and documentation
• Mounting hardware

Technical Support and Configuration Assistance

Our team at Hybrid EV Engineering provides comprehensive technical support for all JK BMS installations. Whether you need help selecting the right BMS for your application, configuring protection parameters, or troubleshooting connectivity issues, we’re here to assist.

We offer:

• Pre-sale consultation and compatibility verification
• Installation guidance and wiring diagrams
• App configuration support
• Integration assistance with inverters and controllers
• Post-installation troubleshooting

Availability and Warranty in Pakistan

This product is available across Pakistan with fast shipping from Hybrid EV Engineering, Rawalpindi. We maintain stock of all popular JK BMS models and ship within 24-48 hours of order confirmation.

We offer technical support, installation guidance, and a 6-month warranty on all JK BMS units against manufacturing defects. The warranty covers electronic failures and component defects under normal operating conditions.

For bulk orders, custom configuration help, or compatibility queries with your specific battery pack, contact us before placing the order. We can provide quantity discounts for system integrators, EV builders, and solar installers.

Why Choose JK BMS for Your Battery Pack

JK BMS has established itself as a leading brand in battery management systems, known for reliability, advanced features, and excellent value. The 8S-24S 0.6A 40A model combines active balancing technology with smart connectivity at an affordable price point, making professional-grade battery management accessible for DIY builders and small businesses.

With support for voltage ranges from 24V to 96V, this single BMS model can serve multiple applications, reducing inventory complexity for integrators and providing upgrade flexibility for end users.