ACCUWATT TECHNOLOGIES
73220 AITON
ACCUWATT Technologies is an independent French company whose industrial activity began in 2004 with the support of the French Ministry of Research, EADS and CEA. Established in Savoie following the takeover of an Arcelor-Mittal plant with support from the Département, the Region and BPI, ACCUWATT Technologies specializes in the development of lithium batteries for applications in constrained environments: Special Services, Defense, Intelligence, Research, as well as in the field of electric mobility. ACCUWATT Technologies is headquartered in Aiton (73220), Savoie, France.
ACCUWATT Technologies’ expertise covers the entire value chain of energy storage systems, from the basic electrochemical cell to commissioning and recycling:
– procurement and qualification (including safety tests) of electrochemical components;
– design of component assembly and welding;
– design and development of BMS, both software and hardware, CAN, LORA, RS485 communication;
– design of calculation algorithms (SOC, SOH…) and safety PLCs;
– design and implementation of thermal and mechanical integration;
– assembly of prototypes;
– small and medium-scale production.These stages are often carried out in partnership with the customer; several projects have been carried out in close collaboration with ECA-Robotics, Thales, MBDA, Naval Group, Alstom, Ifremer.
The technical solution proposed by ACCUWATT technologies is based on batteries already developed and validated by ACCUWATT Technologies for hybrid vehicles or autonomous electric vehicles in marine and underwater environments. The proposed battery is designed to be integrated into an existing IFREMER-supplied watertight enclosure containing other electronic equipment.
The enclosure containing this battery is usually slightly depressurized (300mbars below atmospheric pressure) during charging and/or discharging. The batteries developed by ACCUWATT Technologies for underwater applications are designed to operate nominally in this type of environment. Charging and discharging are possible separately or simultaneously. The battery can be charged and discharged on a table, outside its metal enclosure. The design of the battery as proposed is compatible with the ambient temperature in the enclosure, which can reach 45°C. The total charging time of the battery does not exceed 8 hours. All electrical potentials of the battery are isolated from the mechanical mass.
This charger is supervised, secured and designed to:
– enable charging current parameters to be set;
– integrate a cut-off system, activated automatically in the event of detection of a major fault on the battery (fault to be determined between Ifremer and the supplier) or on a fault in the main charging unit (voltage, current, temperature, charging time, etc.);
– retrieve information from the battery via a CAN bus;
– display this information on a large, easy-to-read touchscreen;
– display this information via a PC via the PC.) ;
– retrieve information from the battery via a CAN bus display this information on a large, easy-to-read touch screen ;
– display this information on a remote PC via an Ethernet link ;
– archive data during charging phases retrieve data locally (USB key or SD card) ;
– be equipped with a stop and start function for the battery;an emergency stop Integrate an emergency power supply system enabling the operator to be alerted in the event of loss of the charger’charger power supply (mains failure);
– integrate an insulation monitoring system between each electrical battery terminal and the mechanical earth of the charger/engine assembly. Integrate a « time out » which will automatically stop charging after a set time.’
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