Induction charging device for a vehicle charging system

Patent metadata

Field	Value
Publication number	US-11818873-B2
Application number	US-202017129378-A
Country	US
Kind code	B2
Filing date	Dec 21, 2020
Priority date	Dec 20, 2019
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

An induction charging device for a vehicle charging system may include a magnetic field conductor, a control device, a temperature-control device configured to temperature-control the magnetic field conductor, and an induction coil configured to at least one of transmit and receive a wireless energy transmission. The temperature-control device configured such that a temperature-control fluid is flowable therethrough. The induction charging device may include a first temperature sensor configured to determine a temperature of a temperature-control side of the magnetic field conductor. The induction charging device may include at least one of (i) a second temperature sensor configured to determine a temperature of a coil side of the magnetic field conductor, and (ii) a temperature-control fluid temperature sensor configured to measure a temperature-control fluid temperature of the temperature-control fluid in the temperature-control device. The control device may be configured to limit a thermal load of the magnetic field conductor.

First claim

The invention claimed is:

1. An induction charging device for a vehicle charging system, comprising:
at least one magnetic field conductor;
at least one control device;
at least one temperature-control device configured to temperature-control the at least one magnetic field conductor, the at least one temperature-control device having a temperature-control power that is preset via the at least one control device;
the at least one temperature-control device configured such that a temperature-control fluid is flowable therethrough;
at least one induction coil configured to at least one of transmit and receive a wireless energy transmission with a transmission power that is preset via the at least one control device;
the at least one temperature-control device and the at least one induction coil arranged spaced apart from one another with respect to an axial axis;
the at least one magnetic field conductor arranged between the at least one temperature-control device and the at least one induction coil with respect to the axial axis;
with respect to the axial axis, the at least one temperature-control device is disposed at least one of opposite a temperature-control side of the at least one magnetic field conductor and facing the temperature-control side;
with respect to the axial axis, the at least one induction coil is disposed at least one of opposite a coil side of the at least one magnetic field conductor and facing the coil side;
a first temperature sensor configured to determine a temperature-control-side magnetic field conductor temperature of the temperature-control side;
at least one of (i) a second temperature sensor configured to determine a coil side magnetic field conductor temperature of the coil side and (ii) a temperature-control fluid temperature sensor configured to measure a temperature-control fluid temperature of the temperature-control fluid in the at least one temperature-control device;
wherein the first temperature sensor and the at least one of the second temperature sensor and the temperature-control fluid temperature sensor are each communicatingly connected to the at least one control device; and
wherein the at least one control device is configured to limit a thermal load of the at least one magnetic field conductor.

2. A method for limiting thermal loading of the at least one magnetic field conductor of the induction charging device according to claim 1 , the method comprising:
transmitting, via the first temperature sensor, a first temperature value to the at least one control device;
determining, via the at least one control device, the temperature-control-side magnetic field conductor temperature of the temperature-control side based on the first temperature value;
transmitting, via the second temperature sensor, a second temperature value to the at least one control device;
determining, via the at least one control device, the coil side magnetic field conductor temperature of the coil side based on the second temperature value;
determining, via the at least one control device, a temperature gradient value from an absolute amount of a differential between the determined temperature-control-side magnetic field conductor temperature and the determined coil side magnetic field conductor temperature;
comparing, via the at least one control device, the temperature gradient value with a predefined gradient limit value; and
when the temperature gradient value is greater than the predefined gradient limit value, adjusting, via the at least one control device, at least one of (i) the temperature-control power of the at least one temperature-control device and (ii) a transmission power of at least one of the induction charging device, the at least one induction coil, and a transmission power adjustment device.

3. The method according to claim 2 , further comprising:
transmitting, via the temperature-control fluid temperature sensor, a measured temperature-control fluid temperature of the temperature-control fluid to the at least one control device;
determining, via the at least one control device a differential value from an absolute amount of a differential between the determined temperature-control-side magnetic field conductor temperature and the measured temperature-control fluid temperature;
comparing, via the at least one control device, the differential value with a predefined differential limit value; and
when the differential value is greater than the predefined differential limit value, adjusting, via the at least one control device, at least one of (i) the temperature-control power of the at least one temperature-control device and (ii) the transmission power of at least one of the induction charging device, the at least one induction coil, and the transmission power adjustment device.

4. The method according to claim 3 , further comprising carrying out, via the at least one control device, a wireless energy transmission with a maximum transmission power of the induction charging device when at least one of:
the temperature gradient value is equal to or smaller than the predefined gradient limit value;
the differential value is equal to or smaller than the predefined differential limit value; and
at least one of the determined temperature-control-side magnetic field conductor temperature and the determined coil side magnetic field conductor temperature is equal to or smaller than a predefined temperature limit value.

5. The method according to claim 2 , further comprising:
comparing, via the at least one control device, at least one of the determined temperature-control-side magnetic field conductor temperature and the determined coil side magnetic field conductor temperature with a predefined temperature limit value; and
when the at least one of the determined temperature-control-side magnetic field conductor temperature and the determined coil side magnetic field conductor temperature is greater than the predefined temperature limit value, adjusting, via the at least one control device, at least one of (i) the temperature-control power of the at least one temperature-control device and (ii) the transmission power of the induction charging device.

6. The method according to claim 2 , further comprising at least one of:
measuring, via the first temperature sensor, the first temperature value on the temperature-control side of the at least one magnetic field conductor; and
measuring, via the second temperature sensor, the second temperature value on the coil side of the at least one magnetic field conductor.

7. The method according to claim 2 , further comprising at least one of:
measuring, via the first temperature sensor, the first temperature value at a measurement point on the at least one magnetic field conductor disposed spaced apart from the temperature-control side, and wherein the at least one control device, with a stored transmission function, determines the temperature-control-side magnetic field conductor temperature on the temperature-control side from the first temperature value; and
measuring, via the second temperature sensor, the second temperature value at a measurement point on the at least one magnetic field conductor disposed spaced apart from the coil side, and wherein the at least one control device, with a stored transmission function, determines the coil-side magnetic field conductor temperature on the coil side from the second temperature value.

8. The method according to claim 2 , further comprising:
correcting, via the at least one control device utilizing at least one stored correcting function, at least one of the first temperature value and the second temperature value with respect to at least one of electromagnetic effects and parasitic thermal effects;

Assignees

• Mahle Int Gmbh

Inventors

• Wiebelt Achim
• Schall Volker
• Laemmle Christopher
• Schroth Holger

Classifications

• H05K7/20945 Primary

  Thermal management, e.g. inverter temperature control · CPC title

• B60L53/126

  Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver · CPC title

• B60L53/302

  Cooling of charging equipment · CPC title

• H02J50/12

  of the resonant type · CPC title

• H02J50/40

  using two or more transmitting or receiving devices (H02J50/50 takes precedence) · CPC title