High Voltage Coolant Heater Sizing for EVs: Flow, Temperature and Power A high voltage coolant heater is sized right when three things line up: the heat load, the coolant flow, and the voltage platform. Get the heat load wrong and…
A battery thermal management system (BTMS) can fit the vehicle drawing and still be difficult to service. Before releasing the packaging design, ask a technician to show how they would reach the coolant connections, read the unit label and remove…
Picking a high-voltage PTC heater starts with the heating task, not the kilowatt rating. Define what the battery system needs — preheating, cabin heating, or both — under real operating conditions, then match the heater’s voltage platform, power band, control…
An electric bus battery thermal management system (BTMS) supplier should be able to explain how its proposed unit will work on your bus, identify the assumptions behind that proposal, and agree on what the first sample must demonstrate. Use those…
A review of the integration of a braking resistor tends to get bogged down in the same three questions. They seem straightforward, but each one has posed a problem in a real-world project. Can the vehicle cut the power supply…
Battery pack thermal management is most effective when the battery supplier and vehicle team agree on the boundaries before they compare equipment. A cooling unit cannot be selected from battery capacity alone. The decision also depends on the battery’s permissible…
Intro (no heading — first paragraphs as plain paragraphs) These types of support calls usually follow a similar pattern: a bus breaks down on a long downhill stretch, but runs perfectly fine on flat roads. Drivers report that the brakes…
A practical interface and procurement checklist for selecting a PTC coolant heater for a battery thermal management system.
We receive enquiries of this kind every week, often consisting of just a single line: ‘12-metre electric bus, requires a battery thermal management system (BTMS), please provide a quotation. ’ When we reply and ask for further details, buyers sometimes…
Previously, we received a request for quotation containing just one specification: ‘120 kW, air-cooled or liquid-cooled, please provide a quote.’ We replied with six questions, but the client assumed we were deliberately stalling. Three weeks later, he finally provided the…