EP4580906A1 - Dispositif et procédé de détermination d'une température de liquide de refroidissement d'un circuit de refroidissement - Google Patents

Dispositif et procédé de détermination d'une température de liquide de refroidissement d'un circuit de refroidissement

Info

Publication number
EP4580906A1
EP4580906A1 EP23735714.0A EP23735714A EP4580906A1 EP 4580906 A1 EP4580906 A1 EP 4580906A1 EP 23735714 A EP23735714 A EP 23735714A EP 4580906 A1 EP4580906 A1 EP 4580906A1
Authority
EP
European Patent Office
Prior art keywords
component
power electronics
temperature
cooling circuit
switched
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23735714.0A
Other languages
German (de)
English (en)
Inventor
Koji Rudolf Jaeger
Markus Michels
Julia Bihlmaier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP4580906A1 publication Critical patent/EP4580906A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/302—Cooling of charging equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/12—Recording operating variables ; Monitoring of operating variables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/36—Temperature of vehicle components or parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/52—Drive Train control parameters related to converters
    • B60L2240/525—Temperature of converter or components thereof

Definitions

  • the invention relates to a device and a method for determining a coolant temperature of a cooling circuit.
  • the invention further relates to an electrical system, a drive train with a device, a vehicle with a drive train as well as a computer program and a machine-readable storage medium.
  • Power electronic devices preferably in vehicles, such as chargers, DC-DC converters, inverters and/or electrical machines, generate waste heat during operation, which is removed from the heat source by means of a coolant in a cooling circuit.
  • the heat sources are preferably power electronic components, preferably circuit breakers.
  • a corresponding implementation is known from the publication WO 2017/182226 Al.
  • the temperature of the coolant must be known. If the coolant temperature exceeds a predeterminable threshold value, sufficient waste heat can no longer be dissipated using the heated coolant. Therefore, the device is switched off or its currently implemented power is reduced to such an extent that the coolant temperature drops again and cooling of the power electronic components is made possible again.
  • temperature sensors are arranged on the cooling circuit or in the coolant, which determine the temperature.
  • the temperature sensors In order to reduce the installation space required for the temperature sensors, there is a need for solutions for determining the coolant temperature that enable the coolant temperature to be determined without appropriately arranged temperature sensors on the cooling circuit. Disclosure of the invention
  • a device for determining a coolant temperature of a cooling circuit is provided.
  • the cooling circuit is designed for sequentially cooling the power electronics of at least a first and a second power electrical component.
  • the first component includes a first sensor device for determining the temperature of the power electronics of the first component.
  • the second component includes a second sensor device for determining the temperature of the power electronics of the second component.
  • the first component is switched on at least temporarily and its power electronics generate waste heat. At the same time, the second component is switched off.
  • the device is set up to receive and evaluate a signal that characterizes the temperature of the power electronics of the switched-off second component during operation of the first component to determine the coolant temperature of the cooling circuit and to determine the coolant temperature of the cooling circuit during operation of the second component Receive and evaluate signal that characterizes the temperature of the power electronics of the switched off first component.
  • the coolant temperature is preferably the temperature of the coolant in the cooling circuit, preferably the average temperature of the coolant in the cooling circuit.
  • the cooling circuit preferably comprises a closed line system through which a cooling medium, cooling fluid or coolant flows, the coolant flowing through a heat exchanger and being cooled therein. The coolant then flows past heat sources one after the other and heats up again in order to be cooled again via the heat exchanger.
  • the heat sources or power electrical components are preferably individual line electronic assemblies or devices which, when switched on, preferably during operation, generate waste heat which is dissipated by means of the coolant flowing past. When the power electrical components are switched off, preferably not in operation, they do not generate any waste heat.
  • the first and second power electrical components Each can be arranged in its own housing, or preferably in a common housing, preferably with a spatial distance on a common or several circuit boards.
  • corresponding power electrical components include sensor devices for determining the temperature of their power electronic components, preferably power switches, capacitors, chokes or windings of an electrical machine.
  • the sensor devices for determining the temperature of the power electronics of the components are preferably arranged in the immediate vicinity of the power electronics and enable the temperature of the power electronics of the component to be determined precisely.
  • the power electronics are preferably connected to the cooling circuit in a very good heat-conducting manner. Consequently, the power electronics quickly assume the temperature of the coolant when it is not being operated or is switched off, preferably permanently.
  • the device receives and evaluates a signal that characterizes the temperature of the switched-off power electrical component.
  • the signal is preferably received and evaluated by the switched off component or by the sensor device of the switched off component.
  • the greater the distance between the sensor device used to determine the coolant temperature and the actual heat source the more accurately the determination of the actual coolant temperature of the cooling circuit is possible.
  • the influence of the heat source on the coolant temperature in the area of the sensor device to be taken into account decreases as the distance between the heat source and the sensor device to be taken into account increases.
  • the coolant temperature is preferably determined when evaluating the signal.
  • the coolant temperature is preferably determined from the received signal using a calculation model.
  • the calculation model taken into account preferably depicts the heat transfer from the sensor device to the coolant.
  • the coolant temperature exceeds a predeterminable threshold value and sufficient waste heat is no longer dissipated by means of the heated coolant, at least one component is switched off or its currently implemented power is reduced to such an extent that the coolant temperature drops again and cooling of the power electronic components is made possible again.
  • the volume flow of the coolant is preferably increased or the Coolant temperature is reduced by increasing the cooling capacity of the heat exchanger located in the cooling circuit.
  • a simple device is advantageously provided which determines the coolant temperature of a cooling circuit. No additional components or installation space are required for this solution.
  • An embodiment of a first power electrical component is advantageously provided.
  • the second component is a DC-DC converter or an inverter.
  • the power electronics of the second component includes circuit breakers.
  • the second component is a DC-DC converter for converting the high voltage of the high-voltage battery into a low-voltage voltage for supplying an on-board electrical system of the vehicle.
  • the second sensor device for determining the temperature of the power electronics of the second component is preferably arranged in the immediate vicinity of the power switches of the DC-DC converter and enables the temperature of the power switches of the DC-DC converter to be precisely determined.
  • the circuit breakers, IGBT or MOSFET are preferably connected to the cooling circuit in a very good heat-conducting manner. Consequently, the circuit breakers quickly assume the temperature of the coolant when they are not being operated or, preferably permanently, are switched off.
  • An embodiment of a second power electrical component is advantageously provided.
  • an electrical system which comprises at least a first and a second power electronic component, a common cooling circuit for sequentially cooling the power electronics of the first and second components, and a device for determining a coolant temperature of the cooling circuit.
  • the first component comprises a first sensor device for determining the temperature of the power electronics of the first component and the second component comprises a second sensor device for determining the temperature of the power electronics of the second component. At least temporarily the first component is switched on and its power electronics generate waste heat and at the same time the second component is switched off and vice versa.
  • the device is set up to receive and evaluate a signal that characterizes the temperature of the power electronics of the switched-off second component during operation of the first component for determining the coolant temperature of the cooling circuit and during operation of the second component to determine the coolant temperature of the cooling circuit to receive and evaluate a signal that characterizes the temperature of the power electronics of the switched off first component.
  • An electrical system is advantageously provided which determines the coolant temperature of a cooling circuit. No additional components or installation space are required for this solution.
  • the invention further relates to a drive train with a device as described above, the drive train in particular comprising a high-voltage battery, an inverter and/or an electric machine.
  • a drive train of an electric vehicle is advantageously provided with a device that determines the coolant temperature of a cooling circuit. No additional components or installation space are required for this solution.
  • the invention further relates to a vehicle with a drive train as described above.
  • a vehicle is advantageously provided with a device that determines the coolant temperature of a cooling circuit. No additional components or installation space are required for this solution.
  • the invention further relates to a method for operating a device as presented above, with the following steps:
  • a method is provided which determines the coolant temperature of a cooling circuit. No additional components or installation space are required for this solution.
  • the invention further relates to a computer program comprising commands which, when the program is executed by the device, cause it to carry out the method described.
  • the invention further relates to a machine-readable storage medium comprising instructions which, when executed by the device, cause it to carry out the method described.
  • Figure 1 shows a schematically illustrated vehicle with a drive train with a device
  • the vehicle 700 is shown here only as an example with four wheels, the invention being equally applicable in any vehicle with any number of wheels Can be used on land, on water and in the air.
  • the drive train 600 shown as an example includes at least the device 100.
  • the drive train also preferably includes a first and second power electrical component 510, 520 with a cooling circuit 300 or an electrical system 500, a battery 470, an inverter 472 and/or an electrical machine 474.
  • the Device 100 is set up to determine a coolant temperature of the coolant in the cooling circuit 300.
  • the cooling circuit 300 is designed to sequentially cool the power electronics of at least the first and second power electrical components 510, 520.
  • the cooling circuit is preferably a closed system in which the coolant flows and circulates in one direction.
  • the first component 510 includes a first sensor device 512 for determining the temperature of the power electronics of the first component 510.
  • the first component 510 is shown as a charger, preferably with an input connection 514 for connecting a single- or multi-phase alternating voltage source for charging the battery or high-voltage battery 470 that can be connected on the output side
  • the battery is preferably charged using the alternating voltage source when the vehicle is at a standstill.
  • the second component 520 includes a second sensor device 522 for determining the temperature of the power electronics of the second component 520.
  • the second component 520 is shown as a DC-DC converter, preferably with a low-voltage connection 524, to which the vehicle electrical system and a low-voltage battery of a vehicle are preferably connected.
  • the on-board electrical system is preferably supplied with energy from the high-voltage network or the high-voltage battery, with the high-voltage input voltage being converted into the low voltage of the on-board electrical system.
  • the low-voltage network is supplied by means of the DC-DC converter preferably while the vehicle is traveling. Consequently, the first component 510 is preferably switched on and the second component 520 switched off while the vehicle is at a standstill, and the first component 510 is switched off and the second component 520 switched on while the vehicle is moving.
  • the signal is preferably the signal from the sensor device, also a further processed signal, which determines the temperature characteristic of the power electronics of the switched off power electronics is possible.
  • the coolant temperature is preferably determined when evaluating the signal.
  • the evaluation of the signal preferably includes the direct further use of the signal or includes an evaluation that can include filtering, an offset shift, an application of a calculation model, or further signal processing steps.
  • the electrical system 500 includes at least the first and second power electronic components 510, 520, the common cooling circuit 300, preferably a common cooling circuit section, for sequentially cooling the power electronics of the first and second components 510, 520 and the device 100 for determining the coolant temperature of the Cooling circuit 300.
  • the electrical system 500 is shown as a combination of a charger and a DC-DC converter, preferably within a housing.
  • step 810 a signal is received which characterizes the temperature of the power electronics of the switched off power electronics.
  • step 820 the received signal is evaluated.
  • the coolant temperature is preferably determined when evaluating the signal.
  • step 825 ends with step 825.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

L'invention concerne un dispositif (100) pour déterminer une température de liquide de refroidissement d'un circuit de refroidissement (300), le circuit de refroidissement (300) étant conçu pour un refroidissement séquentiel de l'électronique de puissance d'au moins un premier et un second composant de puissance électrique (510, 520). Le dispositif (100) est conçu pour recevoir et évaluer un signal qui caractérise la température de l'électronique de puissance du second composant éteint (520) pendant le fonctionnement du premier composant (510), afin de déterminer la température de liquide de refroidissement du circuit de refroidissement (300), et pour recevoir et évaluer un signal qui caractérise la température de l'électronique de puissance du premier composant éteint (510) pendant le fonctionnement du second composant (520), afin de déterminer la température de liquide de refroidissement du circuit de refroidissement (300).
EP23735714.0A 2022-08-29 2023-06-27 Dispositif et procédé de détermination d'une température de liquide de refroidissement d'un circuit de refroidissement Pending EP4580906A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022208918.9A DE102022208918A1 (de) 2022-08-29 2022-08-29 Vorrichtung und Verfahren zur Ermittlung einer Kühlmitteltemperatur eines Kühlkreislaufes
PCT/EP2023/067459 WO2024046613A1 (fr) 2022-08-29 2023-06-27 Dispositif et procédé de détermination d'une température de liquide de refroidissement d'un circuit de refroidissement

Publications (1)

Publication Number Publication Date
EP4580906A1 true EP4580906A1 (fr) 2025-07-09

Family

ID=87060420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23735714.0A Pending EP4580906A1 (fr) 2022-08-29 2023-06-27 Dispositif et procédé de détermination d'une température de liquide de refroidissement d'un circuit de refroidissement

Country Status (4)

Country Link
EP (1) EP4580906A1 (fr)
CN (1) CN119816430A (fr)
DE (1) DE102022208918A1 (fr)
WO (1) WO2024046613A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5197713B2 (ja) * 2010-10-28 2013-05-15 三菱電機株式会社 冷却システム
CN103415989A (zh) * 2011-03-16 2013-11-27 丰田自动车株式会社 变换器的过热保护控制装置和变换器的过热保护控制方法
US20160318409A1 (en) * 2015-04-28 2016-11-03 Atieva, Inc. EV Muti-Mode Thermal Control System
DE102016206836A1 (de) 2016-04-22 2017-10-26 Robert Bosch Gmbh Verfahren und Vorrichtung zur Bestimmung der Flussrichtung eines Kühlmediums
JP7184607B2 (ja) * 2018-11-22 2022-12-06 日立Astemo株式会社 温度調整システム
EP3979480A1 (fr) * 2020-10-01 2022-04-06 Siemens Aktiengesellschaft Agencement et procédé de détermination des températures des composants électroniques

Also Published As

Publication number Publication date
DE102022208918A1 (de) 2024-02-29
WO2024046613A1 (fr) 2024-03-07
CN119816430A (zh) 2025-04-11

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