Datasheet PAD2 (PDF 124.19 kB)

Electrical Drives
PAD2 electrical coolant pump
2nd generation with brushless motor
Customer benefits
Bosch has been offering the 2nd generation electrical
coolant pump (PAD2) since 2011 in the power range
up to 20 watts. The newly developed pump has all the
advantages of the first generation, such as high durability,
low space, and low weight. In addition PAD2 offers even
further benefits:
▶ Extended temperature range
The usage of the new pump is possible up to a
maximum ambient temperature and a maximum
fluid temperature of 135 °C.
PAD2 electrical coolant pump
Product description
▶ Extended temperature range
▶ Engine mounting possible
The robust design of the pump allows mounting to the
combustion engine.
▶ Minimized noise level
▶ Engine mounting possible
Lower noise levels, achieved by improved internal pump
▶ Minimized noise level
geometry, enables PAD2 to be even more suitable for
▶ Low current consumption
▶ Diagnosis ability and controllability
applications such as hybrid or electric vehicles.
▶ Low current consumption
The current consumption of the pump is reduced by
Technology
approximately 15% at the working point (as compared
PAD2 is a centrifugal pump. The stator and electronics
to PAD1) and is less than 1 A.
are mechanically separated from the rotor within the
sealed-motor housing. The electronics produce a
changing magnetic field via the stator winding when
energized, which then drives the rotor (impeller) –
completing the hydraulic circuit. Since PAD2 (or coolant
▶ Diagnosis ability and controllability
The pump is controllable and capable of various
diagnostics via an additional PWM input signal pin or
via LIN interface.
pumps with electric drives in general) is not connected
to the drive train, it enables and maintains a consistent
coolant flow even after the engine has been switched
off. Electrical and hydraulic connections are adaptable
to specific requirements of the customer.
Examples of application
PAD2 can be used to support the heating circuit, to
utilize residual engine heat and to aid in component
cooling, e.g. turbo chargers, charge-air coolers, and
power-electronic modules for hybrid and electric vehicles.
© Robert Bosch GmbH 2014. All rights reserved, also regarding any disposal,
exploitation, reproduction, editing, distribution, as well as in the event of
applications for industrial property rights.
Robert Bosch GmbH
Electrical Drives
Postfach 11 63
77183 Bühl
Germany
www.bosch-mobility-solutions.com
Printed in Germany
292000P1D7-C/CCA2-201410-De, En