Bosch Motorsport created the L-HSCU, a liquid hydrogen storage control unit with an integrated safety system, in response to these pressing issues. The forthcoming Le Mans 24 Hours event will include this creative idea.
The L-HSCU is designed to manage and oversee the complete hydrogen storage process within a vehicle. This covers every phase, from tank storage and refilling to moving hydrogen to an internal combustion engine or fuel cell. The device uses sensors to collect information on vital characteristics like hydrogen concentration, fuel line temperature, and tank pressure. The L-HSCU automatically initiates safety procedures in the event that any anomalies occur within the hydrogen system. For instance, fans are activated to provide efficient gas dilution in the case of a hydrogen leak. To ensure a safe and effective refueling procedure, the control unit also communicates with exterior and internal refueling systems.
For motorsport uses, liquid hydrogen is being explored as a possible fuel source. Hydrogen must be cooled to about -253°C and kept in insulated, low-temperature tanks at a pressure of about 5 bar in order to liquefy it. This method of storage provides a higher volumetric density compared to gaseous storage, resulting in significantly smaller tank sizes within a race car. The utilization of hydrogen storage necessitates stringent fuel management and safety measures.
The H24EVO fuel cell-powered demonstration vehicle, created as part of the MissionH24 program, was the first to use the L-HSCU liquid hydrogen storage control unit.
The demonstrator will take part in special hydrogen-powered race vehicle demonstration laps on Thursday, June 12, and Saturday, June 14, 2025, as well as be showcased in the H2 Village during the Le Mans 24 Hours event.
Building upon the hydrogen technology incorporated in Bosch Engineering’s Ligier JS2 RH2 test vehicle, further advancements are being made to meet the specific demands of high-performance road-going sports cars. In addition to the established safety system, an emissions control strategy tailored for road applications is currently under development.
