CJMCU-LTC2944 60V Battery Power Measurement Module – Voltage, Current, Temperature Monitor

The CJMCU-LTC2944 is a compact breakout board built around the Analog Devices (Linear Technology) LTC2944, a high-voltage battery gas gauge designed to measure battery charge state, voltage, current, and temperature in portable and multicell battery applications. The module provides a complete battery monitoring solution by integrating a precision coulomb counter, a 14-bit No Latency ΔΣ™ ADC, and an I²C/SMBus interface on a single board, making it suitable for electric vehicles, power tools, e-bikes, solar systems, and backup battery installations.

The LTC2944 Measurement Module measures accumulated battery charge and discharge by integrating the current flowing through an external high-side sense resistor connected between the battery's positive terminal and the load or charger. This bidirectional analog integrator accommodates both charge and discharge currents, and a programmable prescaler supports a wide range of battery capacities. The module operates over a 3.6V to 60V input range, allowing direct measurement of multicell battery stacks without external level-shifting circuitry. Voltage, current, and temperature are measured with 1% accuracy, and the 14-bit ADC provides high-resolution data for precise state-of-charge (SoC) estimation.

All measurements are stored in internal registers accessible via the I²C/SMBus interface, and the module supports programmable high and low thresholds for all four measured quantities. If a programmed threshold is exceeded, the device signals an alert using either the SMBus alert protocol or by setting a flag in the internal status register. The ALCC pin can be configured as an alarm output or charge-complete input, and the module draws a quiescent current of less than 150µA. The CJMCU-LTC2944 is a passive monitoring module—it does not include a display, wireless interface, or enclosure. It is intended for integration into custom battery management systems where accurate charge and discharge tracking is required.