- Max. flow
- 30 L/min
- Max. pressure
- 0.6 MPa
Industry
Electric Vehicles
Electric vehicles run two thermal loops — coolant for the battery and power electronics, oil for the oil-cooled e-drive. Electric water pumps and electric oil pumps drive them.
Overview
Overview
As e-drive power density grows, a water jacket alone can no longer remove enough heat from the motor windings. Oil cooling lets dielectric oil touch the windings and bearings directly for more effective cooling — and lubricates the reduction gears at the same time.
The electric oil pump is independent of vehicle speed and meters oil precisely by temperature and load, while the battery-side electric water pump works with the heat pump to heat and cool.
Key challenges
- 01 Automotive reliability Vibration, thermal shock, salt spray and EMC validated to automotive processes.
- 02 Cold start Oil is extremely viscous at -40 °C; the pump must start reliably and build pressure fast.
- 03 NVH Without engine noise to mask it, pump noise and vibration are easily noticed.
- 04 Energy use Speed on demand limits the impact of thermal management on range.
Scenarios
Applications
-
Battery pack cooling
An electric water pump drives coolant through the battery cold plates, working with the heat pump to heat or cool.
Recommended: CP-D DC canned pump -
Oil-cooled e-drives
An electric oil pump sprays oil onto stator windings and bearings and lubricates the reduction gears.
Recommended: EOP Electric oil pump -
Hybrid transmission lubrication
The electric oil pump maintains lubrication and cooling while the engine is off.
System solution
Oil-cooled e-drive loop
The electric oil pump draws from the sump; after the oil cooler, flow splits to spray the stator windings and bearings and to lubricate the reduction gears, then returns to the sump.
- 01 Sump Oil reservoir and return
- 02 Electric oil pump EOP integrated pump & controller Our product
- 03 Oil cooler Heat exchange with the coolant loop
- 04 Windings & bearings Spray cooling
- 05 Reduction gears Lubrication
Products
Recommended products
- Max. flow
- 80 L/min
- Max. head
- 18 m
- Displacement
- 5–40 mL/rev
- Speed
- 500–4000 rpm
Case study
Electric oil pump for a 3-in-1 oil-cooled e-drive (sample case)
- Challenge
- Start at -40 °C and coordinate with the vehicle thermal controller over CAN FD.
- Solution
- EOP-12-15 flange-mounted on the e-drive housing, with FOC start-up tuned for cold oil and flow scheduled by motor temperature.
- Result
- Reliable cold starts, lower speed at normal temperatures and reduced drive losses. (Sample content; real case to follow.)
Tell us your duty point — we’ll propose the pump
Flow, head / pressure, fluid, temperature, voltage — the more complete, the more precise the selection.