JKBMS Active Balancer JK-B2A16S — 2A 2~16S Battery Equalizer

JKBMS JK-B2A16S — 2A Active Battery Balancer for 2~16S Packs

The JK-B2A16S is a lightweight, high-precision active battery balancer engineered for 2 to 16 series battery packs. Weighing just 300g, it is the most compact mid-range balancer in the JKBMS lineup — yet delivers the same constant 2A balancing current using ultracapacitor energy transfer technology, regardless of cell voltage difference.

Whether you're building a 48V home ESS, a solar storage system, or a high-voltage EV pack, the JK-B2A16S keeps every cell in balance — quietly, efficiently, and without wasting energy as heat.

Key Features

• 2A constant active balancing current — independent of cell voltage delta
• Supports 2~16S configurations — LiFePO4, Li-ion, LiPo, LTO, lead-acid
• High-precision voltage monitoring — ±3mV accuracy per cell
• Bluetooth connectivity — monitor cell voltages, balancing status, and configure parameters via mobile app
• Optional RS485 or CAN communication (one of two, select at order)
• Optional temperature sensor input
• LED Bluetooth status indicator
• Ultra-lightweight design — 157.6 × 99 × 18.5 mm, only 300g
• No power-on switch — connects and starts balancing automatically

Technical Specifications

• Cell count: 2S ~ 16S
• Balancing current: 2A (constant)
• Cell voltage range: 1V ~ 5V
• Voltage accuracy: ±3mV
• External power supply: DC 24~70V (via V+ / V− terminals)
• Dimensions: 157.6 × 99 × 18.5 mm
• Weight: 300g
• Communication: Bluetooth (standard) + optional RS485 or CAN

Interface

• P1 — Balance & cell voltage connector: B0~B16 cell taps + V+/V− power
• P2 — Temperature sensor input (optional)
• P3 — RS485 / CAN communication port (optional)
• D1 — LED Bluetooth status indicator

Typical Applications

• 48V ~ 60V home energy storage systems (ESS)
• Solar power stations and off-grid systems
• High-voltage e-bike and EV battery packs
• Base station backup power
• Battery pack maintenance and cell recovery

Wiring Notes

• Verify all balance wire connections before powering on
• When used alongside a BMS protection board, connect V− to the BMS P− terminal
• No power-on switch — the balancer starts working immediately upon connection
• External supply voltage must be within DC 24~70V range

📱 Bluetooth App: Available for iOS and Android — monitor cell voltages, balancing status, and configure parameters wirelessly.

⚠️ Shipping Note: Default ships from China. US warehouse stock available upon request — US inventory levels may vary and cannot be guaranteed. Please contact us before ordering if US local shipping is required. WhatsApp: +1 818 938 3175

Need help? Contact us via WhatsApp: +1 818 938 3175 | Email: service@jkbms-ess.com