Device supports the battery management system for 800V batteries
Electronics manufacturer Toshiba Electronics Europe GmbH has launched the TLX9165T, an automotive photorelay in a 10-pin SOL6-T package.
The product can achieve an output withstand voltage of 1800V (min) and is designed to support the battery management system (BMS) for high-voltage, 800V electric vehicle (EV) batteries as well as battery energy storage systems (ESS).
For EVs to be more widely adopted, improvements are needed to shorten charging times and extend cruising range. This can be achieved by making battery systems operate more efficiently. BMS are integral to attaining enhanced efficiency by monitoring the battery charge status and the insulation between the battery and the vehicle body, which is crucial for the safe use of high-voltage batteries.
Electrically isolated photorelays are essential for BMSs that handle high voltages. Similarly, ESSs, which are necessary for the efficient operation of renewable energy, adopt a comparable BMS configuration.
For photorelays that are commonly used in these battery systems, they must be able to withstand a voltage that is approximately twice the system voltage. For example, for an 800V system, it must have an output withstand voltage of over 1600V.
Toshiba's new TLX9165T photorelay is able to meet and exceed this requirement as it is equipped with a newly developed high-voltage MOSFET that can achieve an output withstand voltage of 1800V, making it suitable for 800V systems.The 10-pin SO16L-T package of the TLX9165T incorporates a resin with a Comparative Tracking Index (CTI) of 600 or higher, belonging to Material Group I of the international standard IEC 60664-1.
In addition to this, its pin configuration ensures a creepage distance of 7.5mm or more on the light receiver side, allowing for an operating voltage of 1500V. Ensuring everyday use of PCB pattern designs, the pin pitch and configuration are identical to Toshiba's existing SO16L-T packages (such as TLX9160T and TLX9152M).
The TLX9165T is a normally open (1-From-A) device with an avalanche current rating of IAV=0.6mA and a high isolation voltage of 5000Vrms (min.). It is AEC-Q101 qualified and fully compliant with the IEC 60664-1 international standard. Key applications for the TLX9165T include automotive equipment, particularly BMS for monitoring battery voltage, detecting mechanical relay sticking, and ground fault detection, as well as serving as a replacement for mechanical relays.
