Automobile thermal management domain controller

Abstract

The utility model discloses an automobile thermal management domain controller which is connected with a vehicle control unit through a CAN (controller area network) bus. The automobile thermal management domain controller comprises a low-pressure area and a high-pressure area. The low-voltage area is connected with the vehicle control unit through the CAN bus; the low-voltage area is provided with a microcontroller and a plurality of low-voltage control circuits; the high-voltage area is provided with a plurality of high-voltage control circuits; the microcontroller controls the plurality of low-voltage control circuits and the plurality of high-voltage control circuits. According to the automobile thermal management domain controller, the microcontroller is only arranged in the low-voltage area, so that the low-voltage area is interacted with the whole automobile controller through the CAN bus, signals of the high-voltage area and the low-voltage area are collected through the microcontroller, various control over all control circuits is executed through certain logic, and the reliability of the automobile thermal management domain controller is improved. Therefore, all loads are operated according to a set program, and the thermal management requirement of the whole vehicle is met.

Description

Technical Field

[0001] The utility model belongs to the field of automobile thermal management, and in particular relates to an automobile thermal management domain controller. Background Art

[0002] With the modularization and refinement of automotive thermal management systems, more expansion valves and stop valves are used for precise control of refrigerants, and the corresponding control components and interfaces have also increased, increasing the demand for the number of chips and pushing up the overall cost of components. However, the thermal management of existing automobiles is relatively decentralized, each component has its own controller, and information transmission is slow and unreliable; the circuit integration of thermal management controllers is not high enough, the communication delay between high-voltage components is high, the experience is poor, and the reliability is low.

[0003] Patent number "CN202310743803.5" discloses a heat pump thermal management controller circuit with a multi-transceiver circuit, which is compatible with a variety of loads and designed to be compatible with the different needs of different customers. However, the circuit requires multiple microcontrollers, which is costly, and the high-voltage side microcontroller is easily damaged, resulting in the inability to collect high-voltage area information, reducing reliability. Utility Model Content

[0004] The utility model aims to provide an automobile thermal management domain controller, which improves the integration of internal circuits, reduces the number of microcontrollers used and improves the communication efficiency between components.

[0005] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0006] A vehicle thermal management domain controller is connected to a vehicle controller via a CAN bus; the vehicle thermal management domain controller comprises a low-voltage area and a high-voltage area; the low-voltage area is connected to the vehicle controller via the CAN bus; the low-voltage area is provided with a microcontroller and a plurality of low-voltage control circuits; the high-voltage area is provided with a plurality of high-voltage control circuits; the microcontroller controls the plurality of low-voltage control circuits and the plurality of high-voltage control circuits.

[0007] The utility model discloses an automobile thermal management domain controller, in which a microcontroller is arranged only in the low-voltage area, so that the low-voltage area interacts with the whole vehicle controller through the CAN bus, and the microcontroller collects signals from the high-voltage area and the low-voltage area, and performs various controls on each control circuit through a certain logic, so that all loads operate according to the set program to meet the thermal management requirements of the whole vehicle.

[0008] Preferably, the low-voltage area is further provided with a transceiver; the microcontroller sends and receives information of the CAN bus through the transceiver.

[0009] Preferably, the low-voltage area is also provided with a low-voltage power supply; the low-voltage power supply supplies power to the microcontroller, the transceiver, and the multiple low-voltage control circuits.

[0010] Preferably, the multiple low-voltage control circuits include a water pump drive circuit, a sensor acquisition circuit, a brushed motor drive circuit, a stepper motor drive circuit, and a blower control circuit; the microcontroller controls the water pump drive circuit, the sensor acquisition circuit, the brushed motor drive circuit, the stepper motor drive circuit, and the blower control circuit.

[0011] Preferably, the multiple high-voltage control circuits include a filter circuit; the high-voltage area is provided with a high-voltage power supply; and the high-voltage power supply supplies power to the filter circuit.

[0012] Preferably, the multiple high-voltage control circuits also include switching devices and drive circuits, three-phase half-bridges and drive circuits; the automotive thermal management domain controller also includes an isolation transformer; the low-voltage power supply is connected to the output end of the isolation transformer; the first output end of the isolation transformer is connected to the first input end of the switching device and drive circuit; the second output end of the isolation transformer is connected to the first input end of the three-phase half-bridge and drive circuit.

[0013] Preferably, the automotive thermal management domain controller also includes an isolation driver chip; the third output end of the isolation transformer is connected to the first input end of the isolation driver chip; the microcontroller is connected to the second input end of the isolation driver chip; the first output end of the isolation driver chip is connected to the second input end of the switch device and the drive circuit; the second output end of the isolation driver chip is connected to the second input end of the three-phase half-bridge and drive circuit.

[0014] Preferably, the first output end of the filter circuit and the switch device are connected to the third input end of the drive circuit; the second output end of the filter circuit and the third input end of the three-phase half-bridge drive circuit are connected.

[0015] Preferably, the automotive thermal management domain controller also includes multiple loads; the multiple loads include a heating component and an air-conditioning compressor; the switching device is connected to the output end of the drive circuit and the heating component; the three-phase half-bridge is connected to the output end of the drive circuit and the air-conditioning compressor.

[0016] Preferably, the automotive thermal management domain controller further includes a current sampling chip; one end of the current sampling chip communicates with the microcontroller; and the other end of the current sampling chip is coupled to the high voltage area.

[0017] Beneficial effects:

[0018] The utility model discloses an automobile thermal management domain controller, in which a microcontroller is arranged only in the low-voltage area, so that the low-voltage area interacts with the whole vehicle controller through the CAN bus, and the microcontroller collects signals from the high-voltage area and the low-voltage area, and performs various controls on each control circuit through a certain logic, so that all loads operate according to the set program to meet the thermal management requirements of the whole vehicle; it can also reduce costs, improve integration, and improve reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a structural block diagram of an automobile thermal management domain controller according to an embodiment.

[0020] Reference numerals

[0021] 1. High pressure area; 2. Low pressure area. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0023] The technical solution of the utility model is described in detail below with specific embodiments.

[0024] Example

[0025] like Figure 1 As shown, an automobile thermal management domain controller of the present embodiment is connected to the whole vehicle controller via a CAN bus; the automobile thermal management domain controller includes a low-voltage area 2 and a high-voltage area 1; the low-voltage area 2 is connected to the whole vehicle controller via the CAN bus; the low-voltage area 2 is provided with a microcontroller and multiple low-voltage control circuits; the high-voltage area 1 is provided with multiple high-voltage control circuits; the microcontroller controls the multiple low-voltage control circuits and the multiple high-voltage control circuits.

[0026] Preferably, the low-voltage area 2 is also provided with a CAN / CANFD transceiver; the microcontroller sends and receives information of the CAN bus through the CAN / CANFD transceiver.

[0027] Preferably, the low-voltage area 2 is also provided with a low-voltage power supply; the low-voltage power supply supplies power to the microcontroller, the CAN / CANFD transceiver, and the multiple low-voltage control circuits.

[0028] Preferably, the multiple low-voltage control circuits include a water pump drive circuit, a sensor acquisition circuit, a brushed motor drive circuit, a stepper motor drive circuit, and a blower control circuit; the microcontroller controls the water pump drive circuit, the sensor acquisition circuit, the brushed motor drive circuit, the stepper motor drive circuit, and the blower control circuit.

[0029] Preferably, the multiple high-voltage control circuits include a filter circuit; the high-voltage area 1 is provided with a high-voltage power supply; and the high-voltage power supply supplies power to the filter circuit.

[0030] Preferably, the multiple high-voltage control circuits also include switching devices and drive circuits, three-phase half-bridges and drive circuits; the automotive thermal management domain controller also includes an isolation transformer; the low-voltage power supply is connected to the output end of the isolation transformer; the first output end of the isolation transformer is connected to the first input end of the switching device and drive circuit; the second output end of the isolation transformer is connected to the first input end of the three-phase half-bridge and drive circuit.

[0031] Preferably, the automotive thermal management domain controller also includes an isolation driver chip; the third output end of the isolation transformer is connected to the first input end of the isolation driver chip; the microcontroller is connected to the second input end of the isolation driver chip; the first output end of the isolation driver chip is connected to the second input end of the switch device and the drive circuit; the second output end of the isolation driver chip is connected to the second input end of the three-phase half-bridge and drive circuit.

[0032] Preferably, the first output end of the filter circuit and the switch device are connected to the third input end of the drive circuit; the second output end of the filter circuit and the third input end of the three-phase half-bridge drive circuit are connected.

[0033] Preferably, the automotive thermal management domain controller also includes multiple loads; the multiple loads include PTC (thermistor) and an air-conditioning compressor; the switching device is connected to the output end of the drive circuit and the PTC; the three-phase half-bridge is connected to the output end of the drive circuit and the air-conditioning compressor.

[0034] Preferably, the automotive thermal management domain controller further includes a Hall current sampling chip; one end of the Hall current sampling chip communicates with the microcontroller; and the other end of the Hall current sampling chip is coupled with the high voltage area 1.

[0035] Specifically, the Hall current sampling chip collects the current of the high-voltage area load through magnetic coupling, and converts it into an analog or digital signal and sends it out.

[0036] Specifically, an automotive thermal management domain controller of the present embodiment includes a low-voltage area 2 and a high-voltage area 1; the low-voltage area 2 has a microcontroller, and the high-voltage area 1 does not have a microcontroller; energy is transmitted between the high-voltage area 1 and the low-voltage area 2 through an isolation transformer, a drive signal is transmitted through an isolation drive chip, and a current signal is transmitted through a Hall current sampling chip; the high-voltage area 1 and the low-voltage area 2 each have one or more loads, and information is exchanged with the vehicle controller through the CAN bus.

[0037] Specifically, compared with the old controller, this controller reduces one microcontroller, collects load information through the isolation chip and the Hall current sampling chip, and controls the high-voltage area 1 and the low-voltage area 2 respectively through one microcontroller.

[0038] Specifically, the microcontroller of the low-voltage area 2 collects various signals from the high-voltage area 1 and the low-voltage area 2, and performs various controls through certain logic.

[0039] Specifically, the low-voltage area 2 is powered by a low-voltage power supply; the high-voltage area 1 generates an output power supply from a low-voltage power supply through a switching power supply chip and an isolation transformer to power the three-phase half-bridge drive circuit, the switching device and the drive circuit (PTC control), and the isolation drive chip. The power supply can be one power supply or multiple power supplies, and the drive circuit can be one or more; among them, there may be only one of the three-phase half-bridge drive circuit, the PTC control switch device and the drive circuit, or there may be multiple three-phase half-bridge drive circuits, PTC control switch devices and drive circuits.

[0040] Specifically, the low-voltage area 2 interacts with the vehicle controller via the CAN bus.

[0041] Specifically, the circuits controlled by the low-pressure area 2 include water pump drive circuits and other circuits, and the above control can be single-channel or multi-channel.

[0042] Specifically, the filter circuit is provided with a support capacitor.

[0043] Specifically, the load of the three-phase half bridge and the driving circuit is a load such as an air-conditioning compressor.

[0044] Specifically, the load of the switching device and the driving circuit is a PTC (positive temperature coefficient resistor).

[0045] Specifically, the microcontroller collects information from the high-voltage area 1 and load information from the low-voltage area 2, and is responsible for communicating with other components of the vehicle. As the main device for control execution and logic processing, the microcontroller controls all loads through set programs to meet the thermal management requirements of the vehicle.

[0046] Specifically, through an automotive thermal management domain controller of this embodiment, the number of microcontrollers can be reduced while maintaining high reliability.

[0047] In the automotive thermal management domain controller of the present embodiment, a microcontroller is provided only in the low-voltage area 2, so that the low-voltage area 2 interacts with the vehicle controller through the CAN bus, and the microcontroller collects signals from the high-voltage area 1 and the low-voltage area 2, and performs various controls on each control circuit through a certain logic, so that all loads operate according to the set program to meet the thermal management requirements of the whole vehicle.

[0048] The above is a detailed description of an embodiment of an automotive thermal management domain controller provided by the utility model. This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An automotive thermal management domain controller, characterized in that: The vehicle thermal management domain controller is connected to the vehicle controller via a CAN bus; the vehicle thermal management domain controller comprises a low-voltage area (2) and a high-voltage area (1); the low-voltage area (2) is connected to the vehicle controller via the CAN bus; the low-voltage area (2) is provided with a microcontroller and a plurality of low-voltage control circuits; the high-voltage area (1) is provided with a plurality of high-voltage control circuits; the microcontroller controls the plurality of low-voltage control circuits and the plurality of high-voltage control circuits.

2. The automotive thermal management domain controller according to claim 1, characterized in that: The low-voltage area (2) is also provided with a transceiver; the microcontroller sends and receives information of the CAN bus via the transceiver.

3. The automotive thermal management domain controller according to claim 2, characterized in that: The low-voltage area (2) is also provided with a low-voltage power supply; the low-voltage power supply supplies power to the microcontroller, the transceiver, and the plurality of low-voltage control circuits.

4. The automotive thermal management domain controller according to claim 3, characterized in that: The multiple low-voltage control circuits include a water pump drive circuit, a sensor acquisition circuit, a brush motor drive circuit, a stepper motor drive circuit, and a blower control circuit; the microcontroller controls the water pump drive circuit, the sensor acquisition circuit, the brush motor drive circuit, the stepper motor drive circuit, and the blower control circuit.

5. The automotive thermal management domain controller according to claim 3, characterized in that: The multiple high-voltage control circuits include a filter circuit; the high-voltage area (1) is provided with a high-voltage power supply; the high-voltage power supply supplies power to the filter circuit.

6. The automotive thermal management domain controller according to claim 5, characterized in that: The multiple high-voltage control circuits also include a switch device and a drive circuit, a three-phase half-bridge and a drive circuit; the automotive thermal management domain controller also includes an isolation transformer; the low-voltage power supply is connected to the input end of the isolation transformer; the first output end of the isolation transformer is connected to the first input end of the switch device and the drive circuit; The second output end of the isolation transformer and the first input end of the three-phase half bridge and driving circuit are connected.

7. The automotive thermal management domain controller according to claim 6, characterized in that: The automotive thermal management domain controller also includes an isolation driver chip; the third output end of the isolation transformer is connected to the first input end of the isolation driver chip; the microcontroller is connected to the second input end of the isolation driver chip; the first output end of the isolation driver chip is connected to the second input end of the switch device and the drive circuit; the second output end of the isolation driver chip is connected to the second input end of the three-phase half-bridge and drive circuit.

8. The automotive thermal management domain controller according to claim 7, characterized in that: The first output end of the filter circuit and the switch device are connected to the third input end of the drive circuit; the second output end of the filter circuit and the third input end of the three-phase half-bridge drive circuit are connected.

9. The automotive thermal management domain controller according to claim 8, characterized in that: The automotive thermal management domain controller also includes multiple loads; the multiple loads include heating components and air-conditioning compressors; the switching device is connected to the output end of the drive circuit and the heating components; the three-phase half-bridge is connected to the output end of the drive circuit and the air-conditioning compressor.

10. The automotive thermal management domain controller according to any one of claims 1 to 9, characterized in that: The automobile thermal management domain controller also includes a current sampling chip; one end of the current sampling chip communicates with the microcontroller; and the other end of the current sampling chip is coupled to the high voltage area (1).

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