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CN-122008779-A - Thermal management system and motor vehicle with thermal management system

CN122008779ACN 122008779 ACN122008779 ACN 122008779ACN-122008779-A

Abstract

The invention relates to a thermal management system (100) for a motor vehicle (200), comprising an electric machine (10), a traction battery (11), an inverter (12), and a coolant circuit (13), wherein the electric machine has a stator (14) with a multiphase stator winding (15), the traction battery is electrically connected to the inverter, the inverter has a plurality of output phases (171, 172, 173), which are connected to phases (161,162,163) of the multiphase stator winding of the electric machine to generate a rotating magnetic field, and the coolant circuit is designed to guide a cooling medium (22). The coolant circuit (13) accommodates at least one heating resistor (211, 212, 213) which is electrically connected to the inverter (12) and is arranged for the purpose of releasing heat to the cooling medium (22). The invention further relates to a motor vehicle (200) comprising such a thermal management system (100).

Inventors

  • P-O. Gronwald
  • S. Gruzner

Assignees

  • 大众汽车股份公司

Dates

Publication Date
20260512
Application Date
20251110
Priority Date
20241112

Claims (10)

  1. 1. A thermal management system (100) of a motor vehicle (200), in particular for pre-treating the motor vehicle (200), with an electric machine (10), a traction battery (11), an inverter (12) and a coolant circuit (13), wherein the electric machine (10) has a stator (14) with a multiphase stator winding (15), the traction battery (11) is electrically conductively connected to the inverter (12), the inverter (12) has a plurality of output phases (171, 172, 173) which are connected to the phases (161,162,163) of the multiphase stator winding (15) of the electric machine (10) for generating a rotating magnetic field, and the coolant circuit (13) is configured for guiding a cooling medium (22), characterized in that the coolant circuit (13) accommodates at least one heating resistor (211, 212, 213) which is electrically conductively connected to the inverter (12) and is arranged for discharging heat to the cooling medium (22).
  2. 2. The thermal management system (100) of claim 1, wherein the electric machine (10) has a housing (20) that partially accommodates the coolant circuit (13) in sections.
  3. 3. The thermal management system (100) according to claim 2, wherein the at least one heating resistor (211, 212, 213) is arranged in a section of a coolant circuit (13) which is accommodated by a housing (20) of the electric machine (10).
  4. 4. The thermal management system (100) according to any one of the preceding claims, wherein the coolant circuit (13) is connected with at least one heat sink (23) for heat removal.
  5. 5. The thermal management system (100) of claim 4, wherein the heat sink (23) is a traction battery (11).
  6. 6. The thermal management system (100) according to any one of the preceding claims, wherein the coolant circuit (13) is configured for guiding cooling water (221) as cooling medium (22).
  7. 7. The thermal management system (100) according to any one of the preceding claims, wherein the electrically conductive connection between the inverter (12) and the at least one heating resistor (211, 212, 213) can be switched by means of an actuator (24) such that in the energized state of the at least one heating resistor (211, 212, 213) the phase (161,162,163) of the stator winding (15) is currentless.
  8. 8. The thermal management system (100) of any of claims 1 to 6, wherein the electrically conductive connection between the inverter (12) and the heating resistors (211, 212, 213) is switchless such that in an energized state of the phase (161,162,163) of the stator winding (15), the at least one heating resistor (211, 212, 213) is energized.
  9. 9. The thermal management system (100) of claim 8, wherein the at least one heating resistor (211, 212, 213) is coupled in parallel with one of the phases (161,162,163) of the stator winding (15).
  10. 10. Motor vehicle (200), comprising a thermal management system (100), in particular for pre-treatment of the motor vehicle (200), with an electric machine (10), a traction battery (11), an inverter (12) and a coolant circuit (13), characterized in that the thermal management system (100) is constructed according to any one of claims 1 to 9.

Description

Thermal management system and motor vehicle with thermal management system Technical Field The invention relates to a thermal management system for a motor vehicle, in particular for pre-treatment of a motor vehicle, comprising an electric machine, a traction battery, an inverter and a coolant circuit, wherein the electric machine has a stator with multiphase stator windings, the traction battery is electrically connected to the inverter, the inverter has a plurality of output phases, the output phases are connected to the multiphase stator windings of the electric machine to generate a rotating magnetic field, and the coolant circuit is designed to guide a cooling medium. The invention also relates to a motor vehicle comprising a thermal management system, in particular for pre-conditioning a motor vehicle, having an electric machine, a traction battery, an inverter and a coolant circuit. Background Traction batteries are typically designed as high voltage batteries and supply dc power to an inverter. In electric vehicles, the inverter is in particular configured as a pulse-wave inverter and has three output phases, which are electrically connected to the three phases of the stator winding in such a way that a rotating magnetic field is generated in the operating state of the electric machine. A rotor is rotatably supported within the stator, the rotor rotating in response to a rotating magnetic field and transmitting the rotational motion to a transmission of the motor vehicle, the transmission being in force transmitting connection with a drive wheel of the motor vehicle. Thereby, the electric energy contained in the traction battery is converted into kinetic energy. In the field of electric activity mentioned here, pretreatment is understood to mean, in particular, preheating the traction battery and/or tempering the vehicle interior before starting. If the traction battery of an electric vehicle has a too low temperature, in particular a temperature below 0 ℃, for example in cold winter months, the traction battery can be permanently damaged when the traction battery is often charged with too high a charging power. Thus, known battery management systems reduce the charging power so long, i.e., until the traction battery is heated to a sufficiently high temperature. The optimum temperature of the traction battery should be between 25 ℃ and 45 ℃ depending on the battery type and (battery) cell chemistry. In order to avoid this delay and to enable the traction battery to be charged directly with high charging power, preheating of the traction battery is planned in the context of pretreatment. In order to generate the required heat, a device and a control device are provided, which in combination generate heat and regulate the distribution of heat in the motor vehicle. Providing a large number of devices for generating heat and providing suitable control equipment is costly, and therefore setting and maintaining a desired temperature profile in the context of pretreatment represents a high cost factor in a disadvantageous manner. The following are known from the prior art: In particular, DE 10 2013 012 164 A1 describes a traction battery system for an electrically drivable vehicle, comprising a high-voltage battery, a temperature control device for controlling the temperature of the high-voltage battery, a temperature measuring device for detecting the temperature of the high-voltage battery or the ambient temperature of the high-voltage battery, a battery control device, and an electrical heating device for directly or indirectly heating the high-voltage battery, wherein the battery control device is designed such that the current generated by regenerative braking is conducted to the heating device below a predefinable threshold temperature of the high-voltage battery or of the environment of the high-voltage battery. DE 10 2022 004 894 B3 discloses a temperature control device for a motor vehicle having a refrigerant circuit through which a refrigerant can flow, in which at least one refrigerant compressor for compressing the refrigerant, at least one evaporator for evaporating the refrigerant and a cooling heat exchanger for cooling the refrigerant, which can be circulated by air, are arranged, wherein: The temperature control device has a temperature control circuit through which a temperature control medium can flow, in which at least one electrical or electronic component is arranged, which can be controlled by means of the temperature control medium; The temperature control device has a third heat exchanger which is arranged in the refrigerant circuit and in the temperature control circuit, through which the refrigerant and the temperature control medium can flow and which is provided in addition to the evaporator and in addition to the cooling heat exchanger, via which heat can be exchanged between the refrigerant and the temperature control medium; in the refrigerant circuit, downstream of the thi