Bollinger Motors Files Patent For New Modular Batteries It Will Build In-House

EV startup Bollinger Motors has filed a new patent with the United States Patent and Trademark Office (USPTO) on October 12, this time for the battery pack design that forms part of the world’s first Class 3 electric commercial truck platform.

The patent is meant to protect mechanical, electrical, and systems-engineering innovations of the batteries that Bollinger Motors will build themselves. The battery pack consists of modules in 35 kWh strings that can be connected in series or parallel to form a variety of pack sizes and configurations.

Sizes will include 35, 70, 105, 140, 175 kWh and higher, with many of them available in both 350V and 700V configurations. Structurally, the modules are connected to both sides of a symmetrical and structural I-beam. The latter includes channels through which cooling fluid is pumped to extract heat away from the modules. In addition, the I-beams also provide cross-vehicle structural support and help protect the pack from side intrusions.

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“The heart of every EV is the battery, so it was crucial for us to develop our own battery pack in-house,” says Bollinger Motors CEO Robert Bollinger. “Our engineering team has created a pack with high-strength structural properties, exemplary cooling features, and state-of-the-art software.”

Bollinger Motors has also developed the Battery Management System (BMS) in-house. According to the company, the BMS can handle any number of strings, enabling Bollinger to manufacture one BMS for all future battery-pack sizes and voltages. The Battery Management System monitors voltage, current and temperature at multiple points within the pack, working with other vehicle-control units to maintain optimum operating conditions that increase efficiency and extend battery life. The BMS is also designed to ensure system safety by detecting and isolating faults to enable continued vehicle operation.

The company says its new battery pack will be suitable for heavier applications such as medium duty trucks (the B1 SUV and B2 pickup), agricultural and construction equipment. The company will manufacture the batteries for its own vehicles while also making them commercially available for standalone applications starting in 2021.