WBMS-SW-16S Contactor

Specification: WBMS-SW 16S

Current Rating: >150A

Balance Rating: 400mA

FEATURES

Salient Features

AIS-156 PH-II Compliant (automotive safety standard)

Over Voltage, Under Voltage, Over Current (charge/discharge), Short Circuit, and Temperature protections

Multi-level Over Current Protection (configurable up to 400A in discharge and 250A in charge)

Hardware & Software Interlocks for charger and discharge paths

Predischarge control to prevent inrush currents

Fault latch mechanisms for repeated short circuit/overcurrent events

Automatic recovery or load removal required depending on fault type

Supports 3–16 cells, up to 48–60V packs

High Cell Balancing Current: Up to 400mA/cell

Charging/Discharging Current: Up to 250A

Voltage Sensing Accuracy: ±3mV

Current Sensing Accuracy: ±1%

Predischarge Load Capacity: 3–6mF in 0.5 sec (customizable)

Built-in Power Supply (no external 12V needed)

Low BMS Self-Consumption

Active: ~50–100mA
Shutdown: ~8μA

Isolated CAN2.0B

Bluetooth Low Energy (BLE)

Proprietary CAN Tools

For monitoring, logging, firmware updates

1 Onboard MOSFET Temperature Sensor

6 External Cell Temperature Sensors

Temperature Range: -10°C to 120°C

Accuracy: ±1°C

Over/Under Temperature Protection (for both charging & discharging)

Buzzer Output on:

Thermal Runaway
Contactor Failure
Cell Open Wire
Short Circuit Latch
Over Current in Discharge Latch
Insulation Failure

LED Indication for faults

Onboard uSD Card & EEPROM

Logs data every 1 second
Stores up to 60 days of data

Field Servicing Tools (via CAN)

Data monitoring
Logging
Firmware update

DIAGRAMS

Product Images

Technological

Sustainable

Innovative

Reliable

FAQs

Frequently Asked Questions

How many cells can these BMS units manage?

All models support multiple lithium‑ion cells. Depending on the variant, they can manage anywhere from 3 cells up to 32 cells, covering battery packs from about 48V up to 140V.

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How many cells can these BMS units manage?

All models support multiple lithium‑ion cells. Depending on the variant, they can manage anywhere from 3 cells up to 32 cells, covering battery packs from about 48V up to 140V.

Item #2

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Our Happy Customers

Webber’s BMS is truly ahead of the curve. Installation was seamless, and the support team was responsive and technically sound. Highly recommended for EV startups.

Reliable performance and excellent app interface. The real-time monitoring helped us optimize our fleet management significantly. A great product with room to grow on service speed.

We’ve deployed over 500 units of their motor controller and BMS combo—zero failures so far. The quality is unmatched for the price. Proud to support a Make in India solution.

Their charger integration with our existing systems was surprisingly smooth. The documentation is clear, and they delivered everything on time. Impressive engineering.

The ‘Webber Connect’ app is a game-changer. We now get instant diagnostics and analytics on battery health. This is what India’s EV industry needed.

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