New Industry Products

High-Voltage Battery Management System Offers Configurability and Safety

October 07, 2023 by Mike Falter

The HiVO high-voltage battery management system from BMS PowerSafe offers a modular and scalable approach for high-voltage battery packs in electric vehicles and heavy equipment.

Based in Bordeaux, France, BMS PoweSafe is launching HiVO, a high-voltage battery management system optimized for safety, and designed for configurability and flexibility. 

 

Battery electric rover for agriculture.

Battery electric rover for agriculture. Image used courtesy of BMS PowerSafe
 

The platform consists of three battery management system (BMS) controller sub-systems (cell, battery pack, and isolation) designed to work seamlessly together. 

The HiVO Cell Management Controller (CMC) is a slave board that receives inputs directly from individual battery cells and is serializable up to twelve units as needed to accommodate higher battery voltages.

 

HiVO BMC master board.

HiVO BMC master board. Image used courtesy of BMS PowerSafe
 

The Battery Management Controller (BMC) is a master board that supervises the slave CMC boards and is the intelligence driving the HiVO platform. It monitors and calculates all of the battery’s key performance and operating parameters based on data received from the CMCs.  

The HiVO Isolation Management Controller (IMC) is an isolation board that serves at the interface between the BMS and CMS, providing isolation from the high voltages and currents within the battery system, and facilitating communications.       

Target applications for the HiVO battery management system include battery-powered electric vehicles, buses, boats, agriculture, and construction equipment.
 

Battery Management Systems

The battery management system (BMS) is an essential component of the battery systems used in electric vehicles, trucks, battery energy storage systems (BESS), or any equipment that relies on large battery packs to power its operation.

Within a battery pack, the BMS provides real-time monitoring and communication of critical battery parameters like cell voltages, currents, temperature, and charge status. The BMS helps to coordinate charge and discharge cycles for the battery and ensures battery health and safety are maintained at all times.   

 

Battery management system (BMS) within an HEV.

Battery management system (BMS) within an HEV. Image used courtesy of NXP Semiconductors
 

HiVO - Modular Battery Management Solution

The HiVO battery management system uses a layered approach to battery management that starts with the individual cell and scales to the full battery pack, accommodating batteries of various sizes and voltage levels.

The Cell Management Controller (CMC) is a slave board that monitors and communicates parameters at the individual battery cell level. Each CMC is capable of monitoring up to twelve series connected lithium-ion cells and is compatible with multiple cell technologies (such as NMC, LiFe, and LiPo). The CMC can measure cell voltages with an accuracy of +/- 2 mV and has the capability of monitoring up to four NTC thermistors for temperature data.  

The Battery Management Controller (BMC) is a master board that receives data inputs via the Isolation Management Controller (IMC) from up to twenty CMC slave boards, allowing it to manage battery packs with bus voltages as high as 1000 V. 

 

HiVO layered battery management system.

HiVO layered battery management system. Image used courtesy of BMS PowerSafe

 

The BMC incorporates processing capabilities that allow it to calculate the battery’s state of charge (SOC) to ensure current limits are adhered to during charge and discharge cycles. It can also calculate the state of health (SOH) of the battery, comparing the current performance of the battery to performance benchmarks for a fresh battery. The BMC also has self-diagnostic capabilities and assists with cell balancing.       

Located between the CMC and BMC boards is the Isolation Management Controller (IMC),  which provides an isolation and communication interface between the master and slave. The IMC helps isolate the control circuitry of the BMC from the high voltages of the battery bus and facilitates data communication via an opto-isolated CAN bus 2.0B protocol.