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Electric motor waste heat mode to heat battery

  • US 10,587,162 B2
  • Filed: 11/30/2017
  • Issued: 03/10/2020
  • Est. Priority Date: 06/07/2016
  • Status: Active Grant
First Claim
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1. An electric motor comprising:

  • a case;

    a stator that includes a stator lamination and end-windings; and

    a rotor coupled to the case via at least one rotor bearing, the rotor comprising;

    a hollow cylindrical body having an inner wall, an outer wall, a first distal end, and a second distal end;

    a first shaft portion coupled to the first distal end of the hollow cylindrical body;

    a second shaft portion coupled to the second distal end of the hollow cylindrical body;

    a fluid feed tube having a fluid receive end and a fluid feed end, the fluid feed end extending into the hollow cylindrical body; and

    a plurality of fluid exit ports;

    at least one drive motor fluid pump to pump fluid into the fluid receive end of the fluid feed tube; and

    drive motor electronics, wherein in a waste heat mode;

    the drive motor electronics power the stator with or without causing rotation of the rotor;

    the drive motor fluid pump at least partially fills the hollow cylindrical body with the fluid to force the fluid from the hollow cylindrical body to collect heat from the stator end-windings; and

    the drive motor fluid pump circulates the fluid to a heat exchanger for heating a battery.

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