From cell-level monitoring to megawatt charging — scalable BMS architectures, SiC/GaN power converters, and ISO 26262 ASIL-C safety. Proven across electric trucks, EV charging infrastructure, and stationary energy storage.
The global BMS market is growing at 19% CAGR, driven by EV adoption, grid-scale energy storage, and increasingly stringent safety regulations. Promwad designs battery management systems and power conversion hardware that meet automotive functional safety standards while delivering the performance and efficiency that modern electrification demands.
Our BMS and power electronics team covers the full stack: cell-level voltage and temperature monitoring, SOC/SOH/SOE estimation algorithms, active and passive cell balancing, thermal management control, high-voltage DC/DC and AC/DC conversion with SiC and GaN semiconductors, and wireless charging systems. Every design is developed under ISO 26262 processes with full requirements traceability.
Designed a modular BMS on NXP MPC5775B for a Central European electric truck OEM. The system monitors 800V battery packs with up to 192 cells, implements AI-based SOC/SOH prediction, and integrates with the vehicle CAN-FD network. Dual-core lockstep architecture ensures ASIL-C compliance.
Developed a 4kW SiC-based LLC resonant DC/DC converter for a European EV charging infrastructure company. The converter achieves 98.3% peak efficiency with bidirectional power flow for vehicle-to-grid (V2G) applications. Digital control implemented on TI C2000 DSP.
Built a 3.6kW wireless charging system compliant with SAE J2954 WPT2 for an automated guided vehicle manufacturer. The system enables opportunity charging during loading/unloading stops, eliminating manual plug-in downtime. Coil design optimized for 150mm air gap tolerance.
Client identities changed. Methodologies and outcomes are real.
High-efficiency SiC-based traction inverter for 800V EV platforms. LLC resonant topology with digital control on TI C2000 DSP.
Modular BMS architecture from cell-level monitoring through pack management to vehicle integration. ASIL-C safety with lockstep MCU.
Yes. Our BMS architecture is cell-chemistry-agnostic — we have deployed systems for NMC, LFP, NCA, and solid-state cells. The SOC/SOH algorithms are tuned to each chemistry's voltage-capacity curve and aging characteristics during the calibration phase.
SiC MOSFETs operate at higher switching frequencies (100-500 kHz vs. 20-60 kHz for IGBTs), enabling smaller magnetics and filters. They also have lower conduction losses at high voltages (800V+) and better thermal performance. Our 4kW LLC converter achieves 98.3% efficiency with SiC vs. 96-97% with silicon. The tradeoff is higher semiconductor cost, which is offset by reduced passive component size and improved system-level efficiency.
Yes. Our DC/DC converter designs support bidirectional power flow with seamless mode transitions. We implement OCPP 2.0.1 for communication with charging management systems and handle the regulatory complexity of grid interconnection standards (IEEE 1547, VDE-AR-N 4105).
A complete BMS from architecture through ASIL-C certification typically takes 12-18 months. A BMS without functional safety certification (e.g., for prototyping or stationary storage) can be delivered in 6-9 months. We also offer modular BMS platforms that can be customized in 3-4 months for specific cell configurations.