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BMS1601

16S Standalone BMS

The BMS1601 is a compact, all-in-one digital battery management system for standalone 6S to 16S lithium applications. It integrates a 250 A power path with onboard MOSFET switching, a 250 A shunt current sensor, and built-in precharge, so it controls charge and discharge directly without external contactors. Four high-side switches, isolated CAN Bus, RS485, and RS232 interfaces, and configurable relays and I/O make it a complete, ready-to-use controller for industrial battery systems.

BMS1601

Overview

The BMS1601 is an all-in-one standalone BMS built for industrial 6S to 16S battery systems. It combines cell monitoring, passive balancing, and protection with an integrated 250 A power path, so onboard MOSFETs switch charge and discharge directly with no external contactors. A 250 A shunt sensor, built-in precharge, and four high-side switches handle the full power stage, while isolated CAN Bus, RS485, and RS232 keep integration simple. Configured once, it runs as a complete, self-contained controller.

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The BMS1601 is a fully digital, all-in-one standalone BMS for 6S to 16S lithium packs, measuring every cell to 0.1 mV resolution and balancing passively at up to 420 mA per cell. It tracks temperature through up to three external NTC probes and one onboard sensor, and enforces a complete protection suite covering over and under voltage, over current, over and under temperature, short circuit, delta, precharge, and balancing faults. It can be self-powered or run from an external 12 V to Vbat supply, drawing around 1015 mW in run state and dropping to roughly 0.05 mW in power down until the user button wakes it. What sets the BMS1601 apart is its integrated power stage: an onboard 250 A path with MOSFET switching and a 250 A shunt current sensor let it control charge and discharge directly, with built-in configurable precharge and four high-side switches rated up to 3 A each. Isolated CAN Bus, RS485, and a service RS232 port speak the LiBat, JSON, Modbus RTU, and LiBat CAN protocols, while two relays, three isolated logic inputs, and two isolated logic outputs adapt the board to each system.

Highlighted Features

  1. 01

    Flexible Cell Support

    Monitors and protects from 6 to 16 cells, depending on cell chemistry.

  2. 02

    Current Limit

    ±250A. User need to consider FET cooling options.

  3. 03

    Shutdown or Run Mode

    Device runs in full power mode when powered up, but a shutdown mode can be triggered anytime by parameters or user button action. In shutdown mode, all components are powered down, including the input DC-DC, for minimum power consumption.

  4. 04

    Wake-Up

    User button input always wakes the device up from shutdown mode.

  5. 05

    Onboard Power Supply

    Any power source can be applied as power supply between 18V and 80V. Depending on cell chemistry, the device can directly power up from the battery output.

  6. 06

    Parallel or Series Modes

    Standalone master and multi-master modes can be set via the configuration tool for various battery pack architectures.

  7. 07

    Balancing

    Balance progress parameters can be set via the configuration tool. Balancing start-stop values, delta values, balancing start status, balance ratio, and the maximum number of balancing cells can be configured for application needs.

  8. 08

    Flexible Inputs and Outputs

    Any I/O function can be assigned to any available input or output for maximum flexibility.

  9. 09

    Pre-Charge

    On board precharge power path. Precharge events can be observed and their parameters set via the configuration tool. Precharge can be disabled, or activated in time-only or time/current mode, to meet the maximum flexibility of the battery pack.

  10. 10

    Pre-Discharge

    On board predischarge power path. Predischarge power path option for limiting input current.

  11. 11

    Display

    Any CAN Bus compatible display option can be used for detailed monitoring.

  12. 12

    Remote Monitoring

    A GSM and GPS based optional extension board can be used as an add-on. After connecting the extension, a simple firmware upgrade is needed to start remote monitoring of the system via the GSM line.

  13. 13

    Bluetooth and Wireless

    You have options for Bluetooth monitoring via a mobile application, or wireless monitoring via a browser on the local network. An external wireless-compatible display option or wireless module device needs to be connected via the CAN Bus line.

  14. 14

    Flexible Digital Charger Integration

    Digital charger integration can be configured for various charging scenarios: start-stop charging at a certain level, setting power paths according to the charger connection, preventing driving while charging, and more.

  15. 15

    Charging Curve

    Up to 30 charging current points can be defined for a more efficient charging profile suited to any type of battery pack. Current points based on SOC and temperature set the current level when a digital charger is connected to the CAN Bus line.