The patent application showcases a Bronco-like SUV with a roof rack that houses a roof box-like structure. The backup battery is installed in this box, and a charging cable extends from it, resembling a smartphone backup battery.
The backup battery assembly consists of multiple battery modules and a connection port. A cordset is used to electrically connect the backup battery assembly to the EV's charge port.
The roof-mounted backup battery includes features such as air ducts for improved cell cooling, remotely operated valves to protect against water, extreme cold, or sand entering the enclosure, and thermal management through the use of polyurethane foam lining.
Ford patent for roof-mounted EV backup battery
The backup battery can be charged in the same way as the EV's main battery, and it includes a controller module that can wirelessly communicate with the EV's communication module to control the recharging of the main high-voltage battery.
The concept of a roof-mounted backup battery offers a potential solution for off-roading with EVs in areas with limited charging infrastructure.
Weight is identified as a potential issue due to the heaviness of lithium-ion batteries. Top-heavy vehicles may have a higher risk of tipping over, particularly at high speeds. The presence of the backup battery would affect driving dynamics, requiring drivers to choose between slower driving with the backup battery or faster driving without it.
Source: USPTO
