Air-conditioner controller, control method, and electric-vehicle air conditioning system

Abstract

An air-conditioner controller, a control method, and an electric-vehicle air conditioning system. The controller comprises: a high-voltage-side control unit (10), which comprises a high-voltage-side controller (101); a low-voltage-side control unit (20), which comprises a low-voltage-side controller (201), wherein the low-voltage-side controller (201) receives an external input instruction and transmits same to the high-voltage-side controller (101); a digital isolation unit (30), which is provided between the high-voltage-side control unit (10) and the low-voltage-side control unit (20); and a circuit board (40), wherein the high-voltage-side control unit (10), the low-voltage-side control unit (20) and the digital isolation unit (30) are provided on the circuit board (40).

Description

Air conditioning controller, control method, and electric vehicle air conditioning system

[0001] Related applications

[0002] This disclosure claims priority to Chinese patent application No. 202310748885.2, filed on June 25, 2023, entitled “AN AIR CONDITIONER ALL-IN-ONE CONTROLLER, CONTROL METHOD AND ELECTRIC VEHICLE AIR CONDITIONING SYSTEM,” the entire text of which is incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of automobile air conditioning, and in particular to an air conditioning controller, a control method, and an air conditioning system for an electric vehicle. Background Art

[0004] Whether it's a traditional fuel-powered vehicle, a hybrid vehicle, or a pure electric vehicle, the principles of in-vehicle air conditioning are similar, differing only in the power source. Traditional fuel-powered vehicles' air conditioning is powered by the engine, while hybrid and pure electric vehicles typically rely on batteries to drive the electric air conditioning compressor. However, the heating principles differ significantly between traditional fuel-powered vehicles and electric vehicles. Traditional fuel-powered vehicles primarily generate heat from waste heat generated during engine operation, which is then transported into the vehicle interior via a blower to achieve heating. Pure electric vehicles, lacking an engine, rely on auxiliary heating methods, such as PTC heating or other similar heating methods.

[0005] The entire automotive thermal management system requires multiple functional circuits or controllers, as well as structural components. Typical electrical and structural components of a complete thermal management system generally include: a top-level thermal management controller, a PTC controller, an air conditioning compressor controller, water heater channels, and a water heater resistor unit. In related technologies, each of these subcomponents is relatively independent, typically connected by external wiring harnesses for communication and control.

[0006] Summary of the Invention

[0007] According to various embodiments of the present disclosure, an air-conditioning controller, a control method, and an electric vehicle air-conditioning system are provided.

[0008] As one aspect of an embodiment of the present disclosure, an air conditioner controller is provided, comprising:

[0009] A high-pressure side control unit, comprising a high-pressure side controller, wherein the high-pressure side controller is used to control the operation of the water heater and the compressor to achieve temperature regulation;

[0010] A low-pressure side control unit includes a low-pressure side controller, the low-pressure side controller is used to receive external input instructions and transmit the external input instructions to the high-pressure side controller, the external input instructions are transmitted through the communication circuit via the digital isolation unit, and the external input instructions are used to control the water heater and the compressor;

[0011] a digital isolation unit, disposed between the high-voltage side control unit and the low-voltage side control unit to implement isolated communication between the high-voltage side control unit and the low-voltage side control unit;

[0012] A circuit board is provided on which the high-voltage side control unit, the low-voltage side control unit and the digital isolation unit are arranged.

[0013] Optionally, the high-voltage side control unit further includes a high-voltage EMC filter circuit, which is connected to the power battery and is used to provide stable power supply to the power battery.

[0014] Optionally, the high-voltage side control unit further includes a phase current sampling circuit, and the phase current sampling circuit is used to monitor the three-phase current of the compressor.

[0015] Optionally, the high-voltage side control unit further includes a bus voltage sampling circuit for detecting the voltage of the power battery.

[0016] Optionally, the high-voltage side control unit further includes:

[0017] The bus current sampling circuit is used to sample the input current of the controller.

[0018] Optionally, the high-voltage side control unit further includes:

[0019] The compressor U, V, W three-phase full-bridge circuit / module is used to control the start and stop, speed and working power of the compressor.

[0020] Optionally, the high-voltage side control unit further includes:

[0021] water heaters;

[0022] The water heater power circuit is used to control the start and stop and power of the water heater.

[0023] Optionally, the high-voltage side control unit further includes:

[0024] The water heater resistance current sampling circuit is used to collect the working current of the water heater.

[0025] Optionally, the high-voltage side control unit further includes:

[0026] Power device shell temperature sampling module, used for the shell temperature of power devices of compressor controller and water heater controller;

[0027] The board temperature sampling module is used to collect the temperature of the circuit board.

[0028] Optionally, the low-voltage side control unit or the high-voltage side control unit includes:

[0029] A water temperature sampling module is electrically connected to the low-pressure side control unit or the high-pressure side control unit, and is used to detect the water temperature of the water heater.

[0030] Optionally, the low-voltage side control unit further includes:

[0031] The low-voltage EMC filter circuit is connected to a low-voltage power supply battery. The low-voltage power supply battery supplies power to the low-voltage side control unit. The low-voltage EMC filter circuit is used to achieve stable power supply to the low-voltage side control unit.

[0032] Optionally, the low-voltage side control unit further includes:

[0033] The solenoid valve control module is used to control the start and stop or power of the fan.

[0034] Optionally, the solenoid valve control module is also used to control the start and stop or power of the water pump.

[0035] As another aspect of the embodiments of the present disclosure, a method for controlling thermal management of an air conditioner is provided, which uses the controller according to the first aspect and includes the following steps:

[0036] The low-voltage side controller is used to obtain an external input instruction inputted by the control panel, wherein the external input instruction includes one or more of the following information: power on / off information, temperature setting information or air volume;

[0037] The low-voltage side controller transmits the external input command to the high-voltage side controller, and the external input command is transmitted via the digital isolation unit through the communication circuit; wherein the digital isolation unit is provided between the high-voltage side control unit and the low-voltage side control unit to realize isolated communication between the high-voltage side control unit and the low-voltage side control unit;

[0038] The high-pressure side controller controls the operation of the water heater and the compressor to achieve temperature regulation.

[0039] Optionally, the high-pressure side or the low-pressure side is further used to obtain: the water temperature of the water heater.

[0040] Optionally, the high-pressure side or the low-pressure side is further used to obtain: an operating current of a water heater.

[0041] Optionally, the high-pressure side or the low-pressure side is further used to obtain: the shell temperature of the power components of the compressor controller and the water heating controller, and the temperature of the circuit board.

[0042] As another aspect of the embodiments of the present disclosure, an electric vehicle air-conditioning system is provided, comprising the controller as described in the first aspect; or implementing the control method as described in the second aspect.

[0043] The details of one or more embodiments of the present disclosure are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present disclosure will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the disclosed drawings without any creative work.

[0045] FIG1 is a structural block diagram of an air conditioning controller according to one or more embodiments;

[0046] FIG2 is a schematic structural diagram of an air conditioning controller according to one or more embodiments;

[0047] FIG3 is a power topology schematic diagram of an air conditioning controller according to one or more embodiments;

[0048] FIG4 is a flow chart of an air conditioner thermal management control method according to one or more embodiments;

[0049] FIG5 is a flow chart illustrating a method for implementing temperature regulation according to one or more embodiments.

[0050] Figure numerals: 10, high-voltage side control unit; 101, high-voltage side controller; 102, high-voltage EMC filter circuit; 103, phase current sampling circuit; 104, bus voltage sampling circuit; 105, water heater resistance current sampling circuit; 106, bus current sampling circuit; 107, water heater driven power semiconductor device; 20, low-voltage side control unit; 201, low-voltage side controller; 202, water temperature sampling module; 203, low-voltage EMC filter circuit; 204, solenoid valve control module; 30, digital isolation unit; 40, circuit board; 50, compressor U, V, W three-phase full-bridge circuit / module; 60, water heater. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0053] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0054] The term "and / or" herein simply describes an association relationship between associated objects, indicating that three relationships can exist. For example, "A and / or B" can represent the existence of three situations: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" herein refers to any combination of at least two of any one or more of a plurality of items. For example, "at least one of A, B, and C" can represent any one or more elements selected from the set consisting of A, B, and C.

[0055] In addition, numerous specific details are provided in the following detailed description to better illustrate the present disclosure. Those skilled in the art will appreciate that the present disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main points of the present disclosure.

[0056] It can be understood that the above-mentioned various method embodiments mentioned in the present disclosure can be combined with each other to form combined embodiments without violating the principle logic. Due to space limitations, the present disclosure will not elaborate on them.

[0057] In related solutions, the various sub-components of the air-conditioning controller are often developed and designed by different suppliers or technicians, with inconsistent structures and lack of aesthetics; the entire thermal management system is bulky, reducing the space for vehicle drivers and passengers and reducing their comfort; each sub-component is an independent system with a heavy total weight, which reduces the range of electric vehicles; the sub-components are connected by external wiring harnesses, which are easily damaged or the connector ports have poor contact, reducing product reliability and posing a threat to the smooth operation of the vehicle and the safety of drivers and passengers; the housings and filter components of the sub-components cannot be shared, resulting in a waste of resources, and external connectors and wiring harnesses are expensive, leading to increased manufacturing costs.

[0058] One embodiment of the present disclosure provides an air conditioning controller, as shown in FIG1 , FIG2 , and FIG3 , the air conditioning controller includes:

[0059] The high-pressure side control unit 10 includes a high-pressure side controller 101, which is used to control the operation of the water heater 60 and the compressor (not shown) to achieve temperature regulation;

[0060] The low-pressure side control unit 20 includes a low-pressure side controller 201. The low-pressure side controller 201 is used to receive external input instructions and transmit the external input instructions to the high-pressure side controller 101. The external input instructions are transmitted through the digital isolation unit 30 via a communication circuit (not shown). The external input instructions are used to control the water heater 60 and the compressor.

[0061] The digital isolation unit 30 is provided between the high-voltage side control unit 10 and the low-voltage side control unit 20 to implement isolated communication between the high-voltage side control unit 10 and the low-voltage side control unit 20;

[0062] The circuit board 40 , on which the high-voltage side control unit 10 , the low-voltage side control unit 20 and the digital isolation unit 30 are arranged.

[0063] Among them, the air conditioning controller can be used to realize the control of battery-powered heating in electric vehicles or hybrid vehicles, and can also be used for control equipment in other fields that need to use electric heating to obtain heat.

[0064] The high-voltage side controller 101 or the low-voltage side controller 201 may be a processor or a microcontroller capable of implementing control and data processing, such as an 8-bit or 32-bit MCU.

[0065] The water heater 60 may be a resistive water heater, such as a PTC resistor or a membrane resistor, for increasing the temperature in a space such as a vehicle.

[0066] Among them, the external input instructions can be instructions input by the control panel (not shown) to the low-voltage side controller 201, or they can be received wireless signal instructions, such as power on / off instructions, heating or cooling instructions, temperature adjustment instructions or cooling and heating modes, etc.

[0067] The digital isolation unit 30 may be a digital isolation chip, such as a photoelectric coupler.

[0068] The communication circuit may be a commonly used vehicle communication method, such as CAN communication, LIN communication, or a combination of the two;

[0069] The circuit board 40 may be a PCBA board, and a single PCBA board may be used to implement the functions of multiple controllers.

[0070] In some embodiments, the connection between the air-conditioning controller and the outside, such as the connection between the high-voltage side control unit 10 and the compressor, can be realized through a high-voltage DC connector. The port of the high-voltage DC connector is connected to the high-voltage DC wiring harness and connected to the power battery PDU; the low-voltage side control unit 20 can use a low-voltage signal connector to realize signal transmission, thereby saving the cost of multiple chips such as connectors, wiring harnesses, housings, filter components and MCUs. The low-voltage signal connector port is connected to the low-voltage wiring harness, which is mainly used to receive / send low-voltage battery power supply signals, air-conditioning panel communication signals, fan control signals, water pump control signals, solenoid valves and other signals.

[0071] In some embodiments, the external physical interface of the air-conditioning controller further includes a water channel interface of the water heater 60 , which is used to supply water to the water heater 60 and is connected to a circulating water channel of the entire vehicle.

[0072] In some embodiments, the air conditioning controller can be connected to the three-phase terminals of the air conditioner compressor and the power terminals of the water heater 60 respectively by elastic plug-in, crimping or screw locking.

[0073] Among them, the high-voltage side control unit 10 and the low-voltage side control unit 20 respectively control the high-voltage equipment and the low-voltage equipment, and the high-voltage side control unit 10 and the low-voltage side control unit 20 realize two-way communication through isolated communication, which can enhance the reliability of the electric vehicle air-conditioning thermal management system and reduce the manufacturing and R&D costs of the electric vehicle air-conditioning thermal management system.

[0074] In some embodiments, the high-side control unit 10 further includes a high-voltage EMC filter circuit 102, which is connected to a power battery (not shown) to provide stable power to the power battery. The power battery may be a lithium battery pack or other battery capable of providing power.

[0075] In some embodiments, the high-voltage side control unit 10 further includes a phase current sampling circuit 103 , which is used to monitor the three-phase current of the compressor.

[0076] The phase current sampling circuit 103 may include a current monitor to monitor the three-phase current flowing through the compressor in real time.

[0077] In some embodiments, the high-voltage side control unit 10 further includes a bus voltage sampling circuit 104 , which is used to detect the voltage of the power battery.

[0078] In some embodiments, the high-voltage side control unit 10 further includes a bus current sampling circuit 106 , which is used to sample the input current of the air-conditioning controller.

[0079] In some embodiments, the high-voltage side control unit 10 also includes a compressor U, V, W three-phase full-bridge circuit / module 50, which is used to control the start and stop, speed, and working power of the compressor.

[0080] In some embodiments, the high-voltage side control unit 10 further includes a water heater 60 and a water heater power circuit 104 . The water heater power circuit 104 is used to control the start and stop and power of the water heater.

[0081] In some embodiments, the high-voltage side control unit 10 further includes a water heater resistance current sampling circuit 105 , which is used to collect the operating current of the water heater 60 .

[0082] In some embodiments, the high-voltage side control unit 10 also includes a power device shell temperature sampling module 106 and a board temperature sampling module 107. The power device shell temperature sampling module 106 is used to collect the temperature of the outer shell of the power device of the compressor controller and the water heater controller 60, and the board temperature sampling module 107 is used to collect the temperature of the circuit board 40.

[0083] In some embodiments, the low-pressure side control unit 20 includes: a water temperature sampling module 202 , which is electrically connected to the low-pressure side controller 201 and is used to detect the water temperature of the water heater.

[0084] In some embodiments, the low-voltage side control unit 20 also includes a low-voltage EMC filter circuit 203, which is connected to a low-voltage power supply battery (not shown in the figure). The low-voltage power supply battery supplies power to the low-voltage side control unit 20, and the low-voltage EMC filter circuit 203 is used to achieve stable power supply of the low-voltage side control unit 20.

[0085] In some embodiments, the low-pressure side control unit 20 further includes a solenoid valve control module 204 , which is used to control the start and stop or power of the fan.

[0086] In some embodiments, the solenoid valve control module 204 is also used to control the start and stop or power of the water pump.

[0087] In some embodiments, the solenoid valve control module 204 can control the start and stop or power of the fan or water pump through a power switch device, which can be a MOSFET, an IGBT, a diode, or a triode.

[0088] In other embodiments, the solenoid valve control module 204 may also control the start and stop or power of the fan or water pump through a power module.

[0089] Figure 3 shows the power topology schematic of the air conditioner controller, which includes a high-voltage EMC filter circuit 203, a three-phase full-bridge circuit / module 50 for the compressor U, V, and W, a phase current sampling circuit 103, a bus voltage sampling circuit 104, a bus current sampling circuit 106, a water heater 60, a power semiconductor device 107 of the water heater controller (not shown), and a water heater resistor current sampling circuit 105. G1-G6 are power switching devices that control the normal operation of the compressor, G7-G8 are power switching devices that control the heating of the PTC resistor or membrane resistor, M is the compressor, R1-R6 are current sampling resistors, and the sampled current signals are used for loop control. Power devices are not limited to IGBTs, MOSFETs, etc.

[0090] Each module in the aforementioned air conditioning controller may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a server processor in hardware form, or may be stored in a server memory in software form, allowing the processor to call and execute the corresponding operations of each module.

[0091] As used in this application, the terms "component," "module," and "system" are intended to refer to a computer-related entity, which can be hardware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable code, a thread of execution, a program, and / or a computer. As an illustration, both an application running on a server and the server can be a component. One or more components can reside in a process and / or thread of execution, and a component can be located within a computer and / or distributed between two or more computers.

[0092] One embodiment of the present disclosure provides an air conditioning thermal management control method, which adopts the air conditioning controller in the above embodiment. Figure 4 is a flow chart of the air conditioning thermal management control method of one embodiment of the present disclosure. It should be understood that although the various steps in the flow chart shown in Figure 4 are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and they can be executed in other orders. Moreover, at least part of the steps in Figure 4 may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternating with other steps or at least part of the sub-steps or stages of other steps.

[0093] As shown in FIG4 , the air conditioner thermal management control method of this embodiment includes the following steps:

[0094] S10. Use the low-voltage side controller to obtain an external input command input from the control panel.

[0095] The external input command includes one or more of the following information: power on / off information, temperature setting information or air volume.

[0096] S20, the low-voltage side controller transmits the external input command to the high-voltage side controller, and the external input command is transmitted through the communication circuit and the digital isolation unit.

[0097] The digital isolation unit is provided between the high-voltage side control unit and the low-voltage side control unit to achieve isolated communication between the high-voltage side control unit and the low-voltage side control unit.

[0098] S30, the high-pressure side controller controls the operation of the water heater and the compressor to achieve temperature regulation.

[0099] In some embodiments, the low-pressure side controller 201 is further configured to obtain: the water temperature of the water heater.

[0100] In some embodiments, the low-pressure side controller 201 is further configured to obtain the inlet and outlet temperatures of the water heater.

[0101] In some embodiments, the low-voltage side controller 201 is further configured to obtain the operating current of the water heater.

[0102] In some embodiments, the low-voltage side controller 201 is also used to monitor the shell temperature of power devices of the compressor controller and the water heating controller, as well as the temperature of the circuit board.

[0103] In some embodiments, the high-voltage side controller 101 is further configured to obtain: the water temperature of the water heater.

[0104] In some embodiments, the high-pressure side controller 101 is also used to obtain the inlet and outlet temperatures of the water heater.

[0105] In some embodiments, the high-voltage side controller 101 is further used to obtain the operating current of the water heater.

[0106] In some embodiments, the high-side controller 101 is further configured to obtain the shell temperature of power devices of the compressor controller and the water heating controller, as well as the temperature of a circuit board.

[0107] According to an exemplary embodiment, as shown in FIG5 , a flow chart of temperature regulation is implemented using the method in this embodiment; the driver and passengers input external input instructions through the air conditioning panel, and the low-pressure side controller 201 receives the external input instructions from the air conditioning panel through CAN / LIN communication (including power on / off information, temperature setting information or air outlet air volume information, etc.), and the low-pressure side controller 201 sends the external input instructions to the high-pressure side controller 101 (Compressor & Heater main control MCU) through CAN / LIN communication. The low-pressure side controller 201 also controls the operation of the fan, water pump, solenoid valve and other actuators; the high-pressure side controller 101 sends PWM waves to control the opening and closing of the EAC / Heater power device, controls the operation of the air conditioning compressor / Heater, adjusts the temperature of the air conditioning system cockpit, and implements temperature regulation. Wherein the heater is a PTC-heated water heater 60.

[0108] According to an exemplary embodiment, this embodiment provides an electric vehicle air-conditioning system, including the air-conditioning controller in the above embodiment; or, implementing the above air-conditioning thermal management control method.

[0109] The present disclosure can solve the difficult problems caused by the relative independence of each sub-component of the air-conditioning thermal management system of an electric vehicle. The high-voltage side control unit 10 and the low-voltage side control unit 20 are arranged on the same circuit board 40 to form an all-in-one air-conditioning controller, which has the following beneficial effects: 1) The structure of the air-conditioning controller is perfectly matched and the appearance is neat; 2) The air-conditioning controller reduces overall consumables and reduces costs by sharing control circuits and EMC components; 3) The power density of the air-conditioning controller is improved and the system volume is reduced; 4) The air-conditioning controller reduces the overall weight and increases the cruising range; 5) The air-conditioning controller eliminates external wiring harness connections, reduces failure points, and enhances reliability.

[0110] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, and the scope of the present disclosure is defined by the appended claims and their equivalents.

[0111] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An air conditioning controller, characterized in that: include: A high-pressure side control unit, comprising a high-pressure side controller, wherein the high-pressure side controller is used to control the operation of the water heater and the compressor to achieve temperature regulation; A low-pressure side control unit, comprising a low-pressure side controller, the low-pressure side controller is used to receive an external input instruction and transmit the external input instruction to the high-pressure side controller, the external input instruction is transmitted through a communication circuit via a digital isolation unit, and the external input instruction is used to control the water heater and the compressor; A digital isolation unit is arranged between the high-voltage side control unit and the low-voltage side control unit to realize isolated communication between the high-voltage side control unit and the low-voltage side control unit; A circuit board, the high-voltage side control unit, the low-voltage side control unit and the digital isolation unit are arranged on the circuit board.

2. The controller according to claim 1, characterized in that The high-voltage side control unit also includes a high-voltage EMC filter circuit, which is connected to the power battery and is used for stable power supply to the power battery.

3. The controller according to claim 1, characterized in that The high-voltage side control unit further includes a phase current sampling circuit, and the phase current sampling circuit is used to monitor the three-phase current of the compressor.

4. The controller according to claim 2, characterized in that The high-voltage side control unit also includes a bus voltage sampling circuit for detecting the voltage of the power battery.

5. The controller according to claim 1, characterized in that The high-voltage side control unit also includes: The bus current sampling circuit is used to sample the input current of the controller.

6. The controller according to any one of claims 1 to 5, characterized in that: The high-voltage side control unit also includes: The compressor U, V, W three-phase full-bridge circuit / module is used to control the start and stop, speed and working power of the compressor.

7. The controller according to claim 1, characterized in that The high-voltage side control unit also includes: Water heaters; The water heater power circuit is used to control the start and stop and power of the water heater.

8. The controller according to claim 7, characterized in that The high-voltage side control unit also includes: The water heater resistance current sampling circuit is used to collect the working current of the water heater.

9. The controller according to any one of claims 1 to 5 and 7, characterized in that: The high-voltage side control unit also includes: Power device shell temperature sampling module, used to collect the shell temperature of power devices of compressor controller and water heater controller; The board temperature sampling module is used to collect the temperature of the circuit board.

10. The controller according to any one of claims 1 to 5 and 7, characterized in that: The low-voltage side control unit or the high-voltage side controller unit comprises: A water temperature sampling module, the water temperature sampling module is electrically connected to the low-pressure side control unit or the high-pressure side control unit, and is used to detect the water temperature of the water heater.

11. The controller according to any one of claims 1 to 5 and 7, characterized in that: The low-voltage side control unit also includes: The low-voltage EMC filter circuit is connected to a low-voltage power supply battery. The low-voltage power supply battery supplies power to the low-voltage side control unit. The low-voltage EMC filter circuit is used to achieve stable power supply of the low-voltage side control unit.

12. The controller according to any one of claims 1 to 5 and 7, characterized in that: The low-voltage side control unit also includes: The solenoid valve control module is used to control the start and stop or power of the fan.

13. The controller according to claim 12, characterized in that The solenoid valve control module is also used to control the start and stop or power of the water pump.

14. An air conditioning thermal management control method, using the controller according to any one of claims 1 to 13, characterized in that: The steps include: The low-voltage side controller is used to obtain an external input instruction input by the control panel, wherein the external input instruction includes one or more of the following information: power on / off information, temperature setting information or air volume; The low-voltage side controller transmits the external input command to the high-voltage side controller, and the external input command is transmitted via the communication circuit via the digital isolation unit; wherein the digital isolation unit is arranged between the high-voltage side control unit and the low-voltage side control unit to realize isolated communication between the high-voltage side control unit and the low-voltage side control unit; The high-pressure side controller controls the operation of the water heater and the compressor to achieve temperature regulation.

15. The control method according to claim 14, characterized in that: The high-pressure side or the low-pressure side is also used to obtain: the water temperature of the water heater.

16. The control method according to claim 14, characterized in that: The high-pressure side or the low-pressure side is also used to obtain: an operating current of a water heater.

17. The control method according to claim 16, characterized in that: The high-pressure side or the low-pressure side is also used to obtain: the shell temperature of the power devices of the compressor controller and the water heating controller and the temperature of the circuit board.

18. An electric vehicle air conditioning system, characterized in that: Comprising a controller as described in any one of claims 1-13; or, implementing a control method as described in any one of claims 14-17.

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