JK-BD4A20S4P Smart BMS 40A 4S-20S with 0.4A Active Balancing

Product Description

        
The JK-BD4A20S4P Smart BMS is a high-performance Battery Management System designed for advanced lithium battery applications. With 4A Active Cell Balancing and support for 4S–20S battery configurations, it helps maintain cell voltage balance while providing essential battery monitoring and protection functions.

It is suitable for professionally assembled battery packs used in solar energy storage, inverter systems, UPS, backup power, EVs and other lithium battery applications.

Applications

The JK-BD4A20S4P can be used in a wide range of lithium battery systems, including:

Solar Energy Storage Systems
Home & Commercial Energy Storage
Inverter Battery Systems
UPS & Backup Power Systems
LiFePO4 Battery Packs
Lithium-Ion Battery Packs
LTO Battery Systems
Electric Vehicle (EV) Battery Packs
Custom Lithium Battery Projects
Off-Grid Power Systems
Renewable Energy Storage
Product Highlights
4A Active Cell Balancing
4S–20S Series Configuration Support
Smart Battery Management & Monitoring
Designed for High-Capacity Lithium Battery Packs
Individual Cell Voltage Monitoring
Battery Pack Protection Functions
Suitable for Multiple Lithium Battery Applications
Ideal for Solar & Inverter Energy Storage
Suitable for Custom Battery Pack Assembly
Compact & Professional BMS Design
Reliable Solution for Long-Term Battery Management
Key Features
0.4A Active Balancing

The built-in 4A active balancing system helps minimize voltage differences between individual cells by transferring energy between cells, improving overall battery pack balance.

4S–20S Battery Support

The BMS is designed for lithium battery packs with 4 to 20 cells connected in series, making it suitable for a wide range of battery voltage configurations.

Intelligent Battery Monitoring

The BMS continuously monitors important battery parameters, including individual cell voltage and overall battery conditions, helping identify abnormal operating conditions.

Comprehensive Battery Protection

The BMS is designed to help protect the battery pack against conditions such as:

Overcharge
Over-Discharge
Over-Current
Short Circuit
Over-Temperature
Abnormal Battery Conditions
Multi-Application Compatibility

The JK-BD4A20S4P can be used in different lithium battery applications, including solar storage, inverter systems, UPS, EVs and custom battery packs, when correctly configured.

Custom Battery Pack Support

Suitable for professionally assembled lithium battery packs where the cell chemistry, series configuration, voltage range and current requirements match the BMS specifications.

Technical Specifications

Parameter Specification

• Model JK-BD4A20S4P
• Product Type Smart Battery Management System (BMS)
• Series Configuration 4S–20S
• Active Balancing Current 4A
• Battery Chemistry LiFePO4 / Lithium-Ion / LTO*
• Cell Monitoring Individual Cell Voltage Monitoring
• Balancing Type Active Balancing
• Protection Functions Overcharge / Over-Discharge / Over-Current / Short Circuit / Temperature*
• Application Voltage According to battery configuration and chemistry
• Battery Application Energy Storage / Inverter / UPS / EV / Custom Battery Pack
• Installation Type Lithium Battery Pack Integration
• BMS Configuration Programmable according to battery chemistry and application

*Actual supported chemistry, protection thresholds and operating limits should be verified according to the exact hardware version and official JK documentation.

Package Includes

1 × JK-BD4A20S4P Smart BMS

1 × BMS Wiring Harness / Balance Cable (where supplied with the specific version)

1 × Temperature Sensor (where supplied with the specific version)

1 × Installation Accessories Set (if included with the selected package)

Note: Package contents may vary depending on the specific JK-BD4A20S4P version and supplier configuration. Please confirm the package before installation.

Recommended For

The JK-BD4A20S4P is an excellent choice for users and battery manufacturers looking for a 0.4A active balancing BMS for 4S–20S lithium battery packs. It is particularly suitable for LiFePO4 energy storage, solar batteries, inverter batteries, backup systems and custom lithium battery applications.

Important Installation Note

For safe operation, the BMS must be installed according to the correct cell sequence and wiring configuration. Battery chemistry, cell count, voltage limits, charging parameters and protection settings should be configured correctly before operating the battery pack.

Professional installation is recommended for high-voltage or high-current battery systems.