Quick Specifications
| Model | JK-B2A24S |
|---|---|
| Dimensions | 160 x 100 x 20 mm |
| Balance | 0.1~2A |
| Strings | 2~24S |
| Accessories | Balance wire harness |
| Application Scenarios | Small sightseeing cars, scooters, shared e-bikes, battery power systems, base station backup, solar power stations, and pack maintenance and repair. |
Quick Specifications
| Model | JK-B2A24S |
|---|---|
| Dimensions | 160 x 100 x 20 mm |
| Balance Current | 0.1~2A |
| Cell Strings | 2~24S |
| Supply Voltage | 40~100V |
| Communication | Bluetooth + mobile app |
| Accessories | Balance wire harness |
| Application Scenarios | Small sightseeing cars, scooters, shared e-bikes, battery power systems, base station backup, solar power stations, and pack maintenance and repair. |
Product Overview
The JK-B2A24S is a 2A active balancer for 2–24S lithium battery packs. Instead of bleeding excess charge through resistors, it shuttles energy between cells through supercapacitors — a transfer method whose current stays constant no matter how small the voltage difference gets.
With ±3mV voltage acquisition accuracy and post-balance cell differences held within 3mV, it keeps large series packs consistent over thousands of cycles. It runs self-powered from the pack itself (or an external 40–100V DC supply), is monitored over Bluetooth, and can be cascaded for strings beyond 24S.
Learn why active balancing beats passive in our active vs. passive balancing guide.
Core Features
- 2A Energy-Transfer Balancing: Supercapacitor-based balancing moves charge between cells at up to 2A — no heat waste, and current stays independent of the voltage delta.
- ≤3mV Post-Balance Accuracy: ±3mV acquisition precision holds finished packs within a 3mV cell spread, protecting usable capacity.
- Wire Resistance Detection: Balance-lead resistance checks catch loose or corroded contacts before they turn into failures.
- Bluetooth App Control: Real-time monitoring and parameter setup from a mobile app, with low-voltage shutdown guarding the pack.
- Cascadable Design: Link multiple units to cover battery strings over 24S without changing the setup workflow.
- Flexible Power: Self-powered from the battery or an external 40–100V DC source; draws 10mA balanced / 6mA idle at 100V.
Application Scenarios
A fit for packs that need regular equalization, the JK-B2A24S serves Small sightseeing cars, scooters, shared e-bikes, battery power systems, base station backup, solar power stations, and pack maintenance and repair.
Active balancing also cuts warranty costs — see the warranty cost analysis.
Frequently Asked Questions
Does the JK-B2A24S replace my BMS?
No. The JK-B2A24S is a standalone active balancer that works alongside your existing BMS. The BMS keeps handling protection (over-charge, over-discharge, short circuit); the JK-B2A24S focuses on keeping every cell at the same voltage.
What is the balancing current of the JK-B2A24S?
The JK-B2A24S balances at up to 2A, transferring energy from the strongest cells to the weakest ones. Higher balancing current means a large or badly imbalanced pack reaches equilibrium much faster.
Can the JK-B2A24S work with fewer than 24 cells?
Yes. The JK-B2A24S supports any pack from 2 to 24 cells in series. Unused balance leads are connected according to the wiring diagram included with the unit — if you are unsure, send us your pack layout and we will confirm the wiring.
Do you offer wholesale pricing on the JK-B2A24S?
Yes. JKBMS supplies the JK-B2A24S to battery pack assemblers, distributors and brands worldwide. Click Request a Quote above for wholesale pricing, OEM/ODM customization options and lead times.