The JK-B1A8S20P Smart BMS is a high-performance Battery Management System designed for 4S-8S lithium battery packs
Featuring 1A active balancing, 200A continuous charge/discharge current, and 350A peak current, it provides superior battery protection, longer battery life, and real-time monitoring through Bluetooth and LCD display support
Ideal for solar energy storage, UPS systems, EVs, and high-power lithium battery applications
Key Highlights
✅ 200A Continuous Charge &
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Product Description
Short Description
The JK-B1A8S20P Smart BMS is a high-performance Battery Management System designed for 4S-8S lithium battery packs. Featuring 1A active balancing, 200A continuous charge/discharge current, and 350A peak current, it provides superior battery protection, longer battery life, and real-time monitoring through Bluetooth and LCD display support. Ideal for solar energy storage, UPS systems, EVs, and high-power lithium battery applications.
Key Highlights
✅ 200A Continuous Charge & Discharge Current
✅ 350A Peak Current Support
✅ 1A Active Balancing Technology
✅ Bluetooth Mobile App Monitoring
✅ LCD Display Compatible
✅ Supports 4S-8S Battery Packs
✅ LiFePO4, Li-ion & LTO Compatible
✅ Smart Battery Protection System
✅ Overcharge & Over-Discharge Protection
✅ Overcurrent & Short Circuit Protection
✅ Temperature Monitoring Support
✅ Improves Battery Performance & Lifespan
✅ Ideal for Solar, UPS & Energy Storage Systems
Product Features
1A Active Cell Balancing
Automatically balances cell voltages by transferring energy between cells, improving battery efficiency and extending cycle life.
Heavy-Duty 200A Output
Built for high-power applications requiring reliable and stable performance.
350A Peak Current Capability
Handles high startup and surge loads with ease, making it suitable for inverters and demanding power systems.
Bluetooth Smart Monitoring
Monitor battery voltage, current, cell status, temperature, alarms, and SOC directly from your smartphone.
LCD Display Support
Compatible with JK LCD displays for real-time battery information and diagnostics.
Complete Battery Protection
•Overcharge Protection
•Over-Discharge Protection
•Overcurrent Protection
•Short Circuit Protection
•Temperature Protection
•Cell Imbalance Protection
JK-B1A8S20P Technical Specifications
Model: JK-B1A8S20P
Battery Type: LiFePO₄ / Li-ion / LTO
Supported Cell Series: 4S–8S
Nominal Battery Voltage: 12V / 24V
Max Continuous Charge Current: 200A
Max Continuous Discharge Current: 200A
Active Balancing Current: 1A
Communication: Bluetooth, CAN, RS485
Mobile App: Android & iOS
PC Software: Supported
Frequently Asked Questions
The JK-B1A8S20P is a Smart Battery Management System (BMS) designed to monitor, manage, and protect compatible lithium battery packs. It supports 4S to 8S battery configurations, with a 200A continuous discharge rating and 1A active cell balancing.
The JK-B1A8S20P supports 4S to 8S battery configurations, allowing it to be used with 4, 5, 6, 7, or 8 cells connected in series, depending on the battery chemistry and required voltage.
Yes. When correctly configured, the JK-B1A8S20P can be used with a 4S LiFePO4 battery pack, which has a nominal voltage of approximately 12.8V.
Yes. An 8S LiFePO4 battery pack has a nominal voltage of approximately 25.6V, making the JK-B1A8S20P suitable for this configuration when properly configured.
The JK-B1A8S20P is rated for 200A continuous discharge current. The actual safe operating current also depends on the battery cells, wiring, connectors, terminals, temperature, and installation conditions.
The 1A active balancing function helps reduce voltage differences between individual cells. It transfers energy between cells to help maintain a more balanced battery pack.
Active balancing can help:
- Reduce voltage differences between cells
- Improve battery pack balance
- Improve usable battery capacity
- Maintain more consistent cell voltages
- Improve overall battery performance
- Support better long-term battery management
Yes. The JK-B1A8S20P can be used for compatible LiFePO4 lithium battery applications, provided that the correct battery chemistry, cell configuration, and BMS parameters are selected.
The JK-B1A8S20P can be used for various compatible lithium battery applications, including:
- LiFePO4 battery packs
- Solar energy storage systems
- Inverter batteries
- Home energy storage
- Custom lithium battery packs
- EV and electric vehicle applications
- High-current battery systems
Yes. Its 200A current rating makes it suitable for compatible high-current solar storage and inverter battery applications, provided that the battery cells, wiring, inverter, and other components are correctly matched.
Yes, where the battery voltage and current requirements are compatible. The BMS can be used in suitable EV and electric bike battery projects, but the motor controller's maximum current and battery cell capability must be considered before installation.
JK Smart BMS models may offer Bluetooth monitoring and mobile app functionality depending on the specific model/version. Always verify the communication features of the exact BMS version before purchase.
The BMS is designed to monitor and protect the battery against abnormal conditions such as over-voltage, under-voltage, over-current, and temperature-related conditions, according to the configured parameters and product version.
Yes, it can be suitable for a 200Ah lithium battery, but BMS selection should not be based only on battery capacity. The battery chemistry, cell configuration, maximum charge/discharge current, and application should also be considered.
No. The 1A active balancing current is separate from the 200A continuous discharge rating.
The 1A specification refers to the cell balancing function, while 200A refers to the rated continuous discharge capability of the BMS.
Before installation, verify:
- Battery chemistry
- Number of cells in series
- Cell voltage
- Balance wire sequence
- Main negative connection
- Main power connections
- Cable size
- Terminal connections
- Charger and load current
Incorrect wiring can damage the BMS or battery cells. Professional installation is recommended.
The JK-B1A8S20P supports 4S–8S configurations. The nominal battery voltage depends on the cell chemistry.
For LiFePO4 batteries:
- 4S = approximately 12.8V nominal
- 8S = approximately 25.6V nominal
Cells connected in series may develop differences in voltage and state of charge. Active balancing helps reduce these differences by transferring energy between cells, helping the battery pack operate more consistently.
Yes. It can be installed in a new compatible lithium battery pack. The battery's series configuration, chemistry, current requirements, and BMS settings must match the BMS specifications.
A 200A BMS is designed to handle a higher rated continuous current than a 100A BMS. However, the correct choice depends on the battery's actual current requirements. A higher-rated BMS does not automatically make a battery capable of delivering more current than its cells, wiring, or other components can safely handle.
The JK-B1A8S20P is ideal for users looking for a high-current 200A Smart BMS with 1A active balancing for compatible lithium battery systems, including solar storage, inverter batteries, EV projects, and custom LiFePO4 battery packs.
The main difference is the rated continuous discharge current:
- JK-B1A8S10P: 100A
- JK-B1A8S20P: 200A
- Both: 1A active balancing and 4S–8S configuration
Choose the model according to the maximum current required by your battery application.
For correct BMS selection, provide:
- Battery voltage
- Battery Ah capacity
- Battery chemistry
- Number of cells in series
- Maximum load current
- Maximum charging current
- Inverter/controller model
- Application type
When purchasing the JK-B1A8S20P in Pakistan, verify the exact JK-B1A8S20P model, 200A current rating, 1A active balancing, and 4S–8S configuration to ensure you receive the correct BMS for your battery project.
