Battery and Electronics Cooling for Electric Off-Road Vehicles

Thermal management solutions for construction, mining, utility, municipal, agricultural, and other off-road mobile machine applications

Why Thermal Management is Crucial

In electric and hybrid off-road machinery, multiple components generate heat during operation:

• Lithium-Ion Battery Packs: Require precise temperature control (typically between 20°C and 35°C) to maintain efficiency and safety.
• Inverters & Power Electronics: Convert and manage high voltage power, generating concentrated heat that must be dissipated to prevent performance degradation.
• Electric Motors: Operate continuously under high load, creating heat that can shorten the life of motor insulation and magnets.

If these thermal loads are not effectively managed, the result can be system inefficiency, reduced power output, or even catastrophic component failure.

Cooling Strategies: Why Liquid Cooling is the Standard

While air cooling may be sufficient in smaller consumer EVs, liquid cooling is the clear choice for off-highway machines. These vehicles experience:

• Higher continuous loads
• Longer duty cycles
• Harsher environments (dust, mud, vibration, wide temperature ranges)

A typical liquid cooling loop includes:

• Electric coolant pump (e.g., from Concentric EMP)
• Heat exchanger or radiator (e.g., from ASA, Bondioli)
• Cold plates or battery jackets (e.g., from Zappi Group)
• Sensors and controller (e.g., from STW, Borg Warner, Zappi Group)
• Coolant reservoir and lines (e.g., from Zappi Group)

Some systems use dual-loop designs—with a separate loop for power electronics and another for batteries—to handle differing thermal needs.

As the off-highway machinery market transitions to electrification, thermal management is becoming a critical design priority. Whether powering a fully electric compact loader or a hybrid utility truck, electric drive systems generate significant heat that must be properly managed to ensure long-term performance, safety, and uptime.

At Quality Hydraulics & Pneumatics, Inc. (QHP), we partner with OEMs to provide proven battery and electronics cooling solutions designed specifically for the demands of mobile off-road equipment. Concentric EMP and Zappi are two of our suppliers that offer components and systems that are rugged, reliable, and integration ready.

Concentric EMP – Brushless DC Coolant Pumps

Concentric EMP’s SmartFlow™ electric coolant pumps are ideal for cooling batteries, inverters, and traction motors in off-road EVs. Key features:

• Variable-speed control via CAN J1939
• Sealed, brushless design for long life
• Flow rates up to 100 L/min
• Pressure capability up to 2.5 bar
• Resistant to vibration and contamination (IP67/IP6K9K rated)

These pumps help reduce parasitic load and increase overall thermal system efficiency.

Zappi – Integrated Thermal Management Components

Zappi offers a full range of modular components tailored to mobile electrification:

• Cold plates and battery chillers
• Custom liquid-cooled manifolds
• High-efficiency liquid-to-air heat exchangers
• Temperature sensors and flow balancing hardware

Zappi systems are built for rugged environments and engineered for thermal uniformity—critical for safe and efficient battery operation.

Engineering Support from QHP

More than just a component supplier, QHP provides application-specific engineering support to help OEMs:

• Evaluate thermal load profiles
• Select and size cooling components
• Integrate pumps, exchangers, and sensors into vehicle architecture
• Ensure compliance with industry standards and vehicle duty cycles

From initial concept through field validation, our team works alongside yours to ensure reliable, efficient thermal performance.

Whether you’re electrifying a mining hauler, a road maintenance vehicle, or a precision agricultural machine, QHP offers the knowledge, components, and support you need to build robust thermal management systems.

Contact us to discuss how battery and power electronics cooling from Concentric EMP and Zappi can fit into your electrification roadmap.