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Power from the high-voltage battery is cut off via the high-voltage service disconnect. When the Manual Service Disconnect (MSD), a removable part of the battery pack, is removed to repair or diagnose the car, the series connection between the modules or cells is broken.
A method that doesn’t require tools for detaching the internal high-voltage battery pack and securing it against short circuits.
The high-voltage battery will be automatically turned off if the circuit is disconnected. The high-voltage disconnect circuit to deactivate the battery and end all high-voltage electric activity in the car. To accomplish this, the circuit must be unplugged from the circuit port associated with the battery.
The Global Electric Vehicle Manual Service Disconnect market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
SAE standards require a Manual Service Disconnect (MSD) to eliminate any voltage between the positive and negative Rechargeable Energy Storage System (RESS) output terminals.
Another SAE standard requires that the measured voltage across all external battery terminal sets be less than 60 VDC within 5 seconds of activating the manual disconnect with the automated disconnect (e.g., contactors) closed. The manual service disconnect position is checked to ensure that it meets the isolation requirements of the battery pack system (i.e., RESS).
Battery topologies featuring manual service disconnects on the most positive, most negative, and center of the array or pack were investigated. The voltage measuring points and single point failure modes were taken into account.
It was discovered that placing the MSD on the other side of the contactor is most efficient in decreasing voltage potential at the terminals for a single contactor pack. The optimal position and design of the service disconnect provide a battery system that can be installed, used, and serviced properly in an electrified vehicle.
