Denso Announces New Electrification Components for Electric Vehicles

Denso Corporation has announced the development of new electrification products designed to improve energy efficiency, driving performance, and charging time in electric vehicles. The company states that these innovations are intended to enhance the practicality of EVs.

The four new products include an inverter for installation in BluE Nexus Corporation's new eAxle, a Cell Supervising Circuit for measuring battery voltage and temperature, and a Shunt Current Sensor for measuring current. All three components will be integrated into the new Toyota bZ4X.

The inverter converts DC power from the battery into AC power to drive the motor. According to Denso, the new inverter features a flat dual-sided cooling structure utilizing the company's proprietary dual-sided cooling technology and power semiconductor expertise.

The inverter incorporates silicon carbide (SiC) power semiconductors, surrounding circuitry, structural design, and high-efficiency cooling. Denso states that compared to its previous silicon-based products, the new inverter reduces power loss by approximately 70% and decreases the core module size by about 30%.

Denso developed a new Cell Supervising Circuit and Shunt Current Sensor using proprietary semiconductor technology and detection accuracy improvements based on material property verification.

According to the company, the Cell Supervising Circuit features a 28-channel cell voltage monitoring IC that reduces the number of monitoring circuits by 20% compared to conventional technologies. Denso also reports that application of noise stress quantification technologies has reduced the number of components required for overvoltage and noise countermeasures.

The Shunt Current Sensor measures electric current through a resistor made of copper material. When current flows through the resistor, a voltage is generated that can be measured to detect current with precision.

Denso conducted material characteristic evaluation of shunt resistors to address variations in resistance caused by ambient temperature and individual differences from welding. The company states that its proprietary correction logic achieves similar precision to multi-point correction while using minimal temperature data, reducing detection error by approximately 50% compared to conventional products while maintaining low costs.