Applied Thermoelectric Solutions Awarded U.S. Patent for VoltaTherm® Battery Thermal Management Technology

The issued claims address multiple parts of a battery thermal-management system rather than a single cooling component.

Individual-Battery Thermoelectric Heating and Cooling

The patent includes claims involving multiple batteries with thermoelectric devices in thermal communication with substantial areas of their battery cases.

This architecture creates the ability to apply heating or cooling locally rather than relying exclusively on a common pack-level thermal condition.

The issued claims also include control circuitry configured to monitor and control battery temperatures individually, including an embodiment in which one battery can be heated while another is cooled.

This capability is directly relevant to the VoltaTherm® concept of individual-battery thermal control.

Independent Temperature Monitoring and Control

Cells within the same battery system do not necessarily experience identical conditions. Differences can develop from electrical loading, internal resistance, state of charge, aging, manufacturing variation, local cooling conditions, and ambient exposure.

Monitoring those differences is useful. Being able to actively respond to them provides an additional level of control.

Thermoelectric devices can reverse the direction of heat pumping when electrical polarity is reversed. The same solid-state device can therefore provide either heating or cooling at the battery interface.

This creates a path toward coordinating thermal actuation with changing battery conditions rather than applying the same thermal response throughout the pack.

Separate Thermal and High-Current Electrical Pathways

Another important concept addressed by the patent is reducing dependence on the battery’s high-current electrical terminals as the primary thermal-management pathway.

Battery posts, tabs, bus bars, and related structures are primarily required to conduct electrical current. Their thermal performance can be constrained by electrical, mechanical, packaging, and manufacturing requirements.

The patented configurations include thermoelectric devices thermally coupled to battery cases, creating greater freedom to optimize the electrical and thermal pathways for their respective functions.

The issued claims also include circuit-board structures that can retain and electrically connect thermoelectric devices while allowing thermal contact with individual batteries.

Integrated Heat Rejection

Removing heat from the battery interface does not complete the thermal-management problem. That heat must ultimately be transferred through the rest of the system and rejected to the environment or another thermal sink.

The patent includes claimed configurations involving radiators in conductive thermal communication with thermoelectric devices, as well as heat-transfer-fluid arrangements and control of fluid flow through portions of the heat-rejection system.

This reflects a central principle of Applied Thermoelectric Solutions’ engineering approach: thermoelectric performance cannot be evaluated from the thermoelectric device alone.

The complete thermal path matters:

Battery → thermal interface → thermoelectric device → heat-rejection interface → radiator or heat sink → environment

VoltaTherm® development therefore considers the thermal, electrical, mechanical, controls, and heat-rejection systems together.