Control systems and vehicles

Abstract

This application provides a control system and a vehicle. The control system includes a high-voltage side circuit and a low-voltage side circuit, with the high-voltage side circuit including a first load. The control system also includes a sampling isolation circuit, which includes a first capacitor and a second capacitor. A first terminal of the first capacitor is electrically connected to a first terminal of the first load, and a first terminal of the second capacitor is electrically connected to a second terminal of the first load. The low-voltage side circuit includes a main control circuit. The sampling isolation circuit is used to transmit the AC signal of the first load to the main control circuit. The main control circuit is also used to control the first load to stop working when the voltage of the received AC signal is greater than a first preset voltage and / or the current is greater than a first preset current. This application uses the first and second capacitors in the sampling isolation circuit to transmit the AC signal of the first load, thereby realizing the current / voltage detection of the first load in the high-voltage side circuit by the main control circuit and the isolation between the main control circuit and the high-voltage side circuit.

Description

Technical Field

[0001] This application relates to the field of vehicles, and more particularly to a control system and a vehicle. Background Technology

[0002] To meet market demands, electric vehicles are becoming increasingly feature-rich, leading to more complex hardware and software designs, and consequently, increased costs and power consumption. For example, in the thermal management system of an electric vehicle, a centralized control scheme is used to dissipate heat from the vehicle's heat-generating components and control the ambient temperature, improving various aspects of vehicle performance, enhancing vehicle safety, and increasing customer satisfaction. This requires the thermal management control module to have the capability for centralized control of multiple functions, various types of loads, and multiple voltage platforms. The thermal management system contains both high-voltage and low-voltage loads. Using two separate control chips to control these loads would increase costs and circuit power consumption; using a single control chip to uniformly control both loads would require an isolation sampling chip for high-low voltage isolation. Currently, single-channel isolation sampling chips are commonly available on the market, which also does not reduce costs and power consumption. Utility Model Content

[0003] To address the problems in the prior art, this application provides a control system and vehicle that helps reduce costs and power consumption.

[0004] This application provides a control system, which includes a high-voltage side circuit and a low-voltage side circuit. The high-voltage side circuit includes a first load. The control system further includes:

[0005] A sampling isolation circuit, comprising a first capacitor and a second capacitor; a first terminal of the first capacitor is electrically connected to a first terminal of the first load, and a first terminal of the second capacitor is electrically connected to a second terminal of the first load.

[0006] The low-voltage side circuit includes a main control circuit, and the operating voltage of the main control circuit is lower than the operating voltage of the first load.

[0007] The main control circuit is also electrically connected to the second terminal of the first capacitor and the second terminal of the second capacitor respectively; the sampling isolation circuit is used to transmit the AC signal of the first load to the main control circuit; the AC signal includes a voltage signal and / or a current signal; the main control circuit is also used to control the first load to stop working when the voltage of the received AC signal is greater than a first preset voltage and / or the current is greater than a first preset current.

[0008] In one embodiment, the sampling isolation circuit further includes a sampling resistor;

[0009] The sampling resistor is connected in series with the first load; the first end of the sampling resistor is electrically connected to the first end of the first capacitor, and the second end of the sampling resistor is electrically connected to the first end of the second capacitor; the sampling resistor is used to collect the AC signal of the first load, and the first capacitor and the second capacitor are used to transmit the AC signal to the main control circuit.

[0010] In one embodiment, the sampling isolation circuit further includes an amplifier;

[0011] The first input terminal of the amplifier is electrically connected to the second terminal of the first capacitor; the second input terminal of the amplifier is electrically connected to the second terminal of the second capacitor; the output terminal of the amplifier is electrically connected to the main control circuit; the amplifier is used to convert the AC signal output by the first capacitor and the second capacitor into a single-ended signal and transmit it to the main control circuit.

[0012] In one embodiment, the number of the first loads is multiple, and the number of the sampling isolation circuits is the same as the number of the first loads.

[0013] In one embodiment, the first load includes a three-phase motor and a three-phase drive circuit, wherein the three-phase drive circuit is used to drive the three-phase motor to work;

[0014] The control system includes three sampling isolation circuits, namely a first sampling isolation circuit, a second sampling isolation circuit, and a third sampling isolation circuit.

[0015] The sampling resistor in the first sampling isolation circuit is connected in series with the first phase driving circuit of the three-phase driving circuit, and is used to collect the AC signal of the first phase driving circuit.

[0016] The sampling resistor in the second sampling isolation circuit is connected in series with the second phase driving circuit of the three-phase driving circuit, and is used to collect the AC signal of the second phase driving circuit;

[0017] The sampling resistor in the third sampling isolation circuit is connected in series with the third phase drive circuit of the three-phase drive circuit, and is used to collect the AC signal of the third phase drive circuit.

[0018] The main control circuit is used to control the three-phase drive circuit to stop working when the voltage of the AC signal received from any one phase drive circuit is greater than a first preset voltage and / or the current is greater than a first preset current.

[0019] In one embodiment, the first load includes a compressor;

[0020] The compressor is electrically connected to the main control circuit, and the main control circuit is used to control the operation of the compressor.

[0021] The compressor is electrically connected to the first terminal of the first capacitor and the first terminal of the second capacitor, respectively. The first capacitor and the second capacitor are used to transmit the AC signal of the compressor to the main control circuit.

[0022] In one embodiment, the first load includes a heater;

[0023] The heater is electrically connected to the main control circuit, and the main control circuit is used to control the operation of the heater.

[0024] The heater is connected to the first terminal of the first capacitor and the first terminal of the second capacitor respectively. The first capacitor and the second capacitor are used to transmit the AC signal of the heater to the main control circuit.

[0025] In one embodiment, the low-pressure side circuit further includes a second load, which includes one or more of a water pump, a multi-way valve, and an expansion valve;

[0026] The water pump is electrically connected to the main control circuit, and the main control circuit is used to control the operation of the water pump;

[0027] The multi-way valve is electrically connected to the main control circuit, and the main control circuit is used to control the operation of the multi-way valve.

[0028] The expansion valve is electrically connected to the main control circuit, and the main control circuit is used to control the operation of the expansion valve.

[0029] In one embodiment, the control system further includes a low-voltage side sampling circuit, and the low-voltage side circuit further includes a second load;

[0030] The low-voltage side sampling circuit is electrically connected to the second load and the main control circuit respectively; the low-voltage side sampling circuit is used to detect the operating voltage and / or operating current of the second load.

[0031] The main control circuit is also used to control the second load to stop working when the operating voltage detected by the low-voltage side sampling circuit is greater than the second preset voltage and / or the operating current is greater than the second preset current.

[0032] This application also proposes a vehicle including the aforementioned control system.

[0033] This application transmits the AC signal of the first load through the first and second capacitors in the sampling isolation circuit, enabling the main control circuit to detect the current / voltage of the first load in the high-voltage side circuit. Simultaneously, utilizing the characteristics of the first and second capacitors, isolation can be achieved between the first load and the main control circuit, preventing the large current in the first load from affecting the main control circuit. This application features a simple circuit structure and uses fewer electronic components, achieving the aforementioned detection and isolation functions while also reducing circuit cost and power consumption. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of an embodiment of the control system of this application.

[0035] Figure 2 This is a structural diagram of an embodiment of the high-voltage side circuit of this application.

[0036] Figure 3 This is a structural diagram of another embodiment of the control system of this application.

[0037] Figure 4 This is a structural diagram of another embodiment of the high-voltage side circuit of this application.

[0038] Figure 5 This is a schematic diagram of the module structure of a first load embodiment of this application.

[0039] Figure 6 This is a structural diagram of another embodiment of the control system of this application.

[0040] Figure 7 This is a schematic diagram of the module structure of another embodiment of the control system of this application.

[0041] Key component symbols: Control system - 100; High-voltage side circuit - 110; Low-voltage side circuit - 120; Sampling isolation circuit - 130; First load - 111; Main control circuit - 121; Sampling resistor - R1; Amplifier - Q1; First capacitor - C1; Second capacitor - C2; Three-phase motor - 111a; Three-phase drive circuit - 111b; First sampling isolation circuit - 131; Second sampling isolation circuit - 132; Third sampling isolation circuit - 133; Second load - 122; Low-voltage side sampling circuit - 140.

[0042] The following detailed description, in conjunction with the accompanying drawings, further illustrates this application. Detailed Implementation

[0043] The following description will refer to the accompanying drawings to provide a more complete picture of the present application. The drawings illustrate exemplary embodiments of the present application. However, the present application may be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components.

[0044] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to limit the application. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to also include the plural forms. Furthermore, when used herein, “comprising” and / or “including” and / or “having,” integers, steps, operations, components, and / or components, but does not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components, and / or groups thereof.

[0045] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Furthermore, unless expressly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as they have in the relevant art and in the content of this application, and will not be interpreted as having an idealized or overly formal meaning.

[0046] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments. It should be noted that components depicted in the drawings are not necessarily shown to scale; and identical or similar components will be designated with the same or similar reference numerals or similar technical terms.

[0047] Reference Figure 1This application proposes a control system 100, which includes a high-voltage side circuit 110 and a low-voltage side circuit 120. The high-voltage side circuit 110 includes a first load 111. The control system 100 also includes a sampling isolation circuit 130. The sampling isolation circuit 130 includes a first capacitor C1 and a second capacitor C2; a first terminal of the first capacitor C1 is electrically connected to a first terminal of the first load 111, and a first terminal of the second capacitor C2 is electrically connected to a second terminal of the first load 111. The low-voltage side circuit 120 further includes a main control circuit 121, the operating voltage of which is less than the operating voltage of the first load 111. The main control circuit 121 is also electrically connected to the second terminal of the first capacitor C1 and the second terminal of the second capacitor C2, respectively. The sampling isolation circuit 130 is used to transmit the AC signal of the first load 111 to the main control circuit 121. The AC signal includes a voltage signal and / or a current signal. The main control circuit 121 is also used to control the first load 111 to stop working when the voltage of the received AC signal is greater than a first preset voltage and / or the current is greater than a first preset current.

[0048] In this embodiment, the control system 100 can be applied to vehicles, ships and other means of transportation, or to home appliances such as air conditioners and refrigerators, or to lights in energy storage devices. This application does not limit this application.

[0049] For example, the control system 100 can be a thermal management system in a vehicle. The first load 111 can be a compressor, heater, or other load requiring a higher voltage power supply, while the low-voltage side circuit 120 can include a second load 122, such as an air pump, multi-way valve, or expansion valve, requiring a lower voltage power supply. In a thermal management system that simultaneously has a high-voltage side circuit 110 and a low-voltage side circuit 120, a main control circuit 121 is used for centralized control. The main control circuit 121 is located in the low-voltage side circuit 120, which can save power consumption. The main control circuit 121 can control the operation of the first load 111 and the second load 122 by outputting PWM signals, high / low levels, etc., and collects parameters such as the operating voltage and operating current of the first load 111 through a sampling isolation circuit 130, while achieving isolation between the high-voltage side circuit 110 and the main control circuit 121. The main control circuit 121 can be implemented using a microprocessor, digital signal processor, system-on-a-chip, etc.

[0050] Specifically, the sampling isolation circuit 130 is located between the first load 111 of the high-voltage side circuit 110 and the main control circuit 121 of the low-voltage side circuit 120. Utilizing the AC-passing and DC-blocking characteristics of the first capacitor C1 and the second capacitor C2, it transmits the AC signal or other data signals of the first load 111 to the main control circuit 121, enabling the main control circuit 121 to detect the current / voltage of the first load 111. If the detected current of the first load 111 is greater than a first preset voltage and / or a first preset current, the main control circuit 121 can control the first load 111 to stop working, preventing damage to the first load 111. The first preset voltage / first preset current can be set according to the actual application; for example, it can be set slightly higher than the operating voltage / current of the first load 111, so that the main control circuit 121 can promptly control the first load 111 to stop working when the voltage / current of the first load 111 is abnormal.

[0051] Meanwhile, the first capacitor C1 and the second capacitor C2 also provide isolation between the first load 111 and the main control circuit 121. Based on the charging and discharging characteristics of capacitors, they exhibit high impedance to direct current (DC) and low impedance to alternating current (AC). Therefore, DC signals cannot pass through the capacitor, while AC signals can. This AC-passing, DC-blocking characteristic allows capacitors to act as isolation devices between DC circuits. If a large current, such as a lightning surge, is present in the first load 111, the first capacitor C1 and the second capacitor C2 present high impedance to this large current, preventing it from being transmitted to the main control circuit 121, thus avoiding damage to the main control circuit 121.

[0052] This application uses the first capacitor C1 and the second capacitor C2 in the sampling isolation circuit 130 to transmit the AC signal of the first load 111, thereby enabling the main control circuit 121 to detect the current / voltage of the first load 111 in the high-voltage side circuit 110. Simultaneously, by utilizing the characteristics of the first capacitor C1 and the second capacitor C2, isolation can be achieved between the first load 111 and the main control circuit 121, preventing the large current in the first load 111 from affecting the main control circuit 121. This application features a simple circuit structure and uses fewer electronic components, achieving the aforementioned detection and isolation functions while also reducing circuit cost and power consumption.

[0053] Reference Figure 2In one embodiment, the sampling isolation circuit 130 further includes a sampling resistor R1. The sampling resistor R1 is connected in series with the first load 111; the first terminal of the sampling resistor R1 is electrically connected to the first terminal of the first capacitor C1, and the second terminal of the sampling resistor R1 is electrically connected to the first terminal of the second capacitor C2; the sampling resistor R1 is used to acquire the AC signal from the first load 111, and the first capacitor C1 and the second capacitor C2 are used to transmit the AC signal to the main control circuit 121. The resistance value of the sampling resistor R1 can be set according to the actual application so that the voltage / current transmitted to the main control circuit 121 is within the operating voltage / current range of the main control circuit 121.

[0054] In one embodiment, the sampling isolation circuit 130 further includes an amplifier Q1. The first input terminal of the amplifier Q1 is electrically connected to the second terminal of the first capacitor C1; the second input terminal of the amplifier Q1 is electrically connected to the second terminal of the second capacitor C2; the output terminal of the amplifier Q1 is electrically connected to the main control circuit 121; the amplifier Q1 is used to convert the AC signal output from the first capacitor C1 and the second capacitor C2 into a single-ended signal and transmit it to the main control circuit 121.

[0055] In this embodiment, the AC signal forms a differential signal in the first capacitor C1 and the second capacitor C2. The amplifier Q1 can convert the differential signal into a corresponding single-ended signal so that the main control circuit 121 can determine the voltage / current of the first load 111 based on the single-ended signal.

[0056] Reference Figure 3 In one embodiment, the number of the first loads 111 is multiple, and the number of the sampling isolation circuits 130 is the same as the number of the first loads 111.

[0057] For example, the high-voltage side circuit 110 of the thermal management control system 100 includes two loads: a compressor and a heater. The number of sampling isolation circuits 130 can be set to two to detect the voltage / current of the compressor and the heater respectively and to isolate them.

[0058] Reference Figure 4 , Figure 5 and Figure 6 In one embodiment, the first load 111 includes a three-phase motor 111a and a three-phase drive circuit 111b, wherein the three-phase drive circuit 111b is used to drive the three-phase motor 111a to work.

[0059] The control system 100 includes a first sampling isolation circuit 131, a second sampling isolation circuit 132, and a third sampling isolation circuit 133. The circuit structures of the first sampling isolation circuit 131, the second sampling isolation circuit 132, and the third sampling isolation circuit 133 are all the same as the circuit structure of the sampling isolation circuit 130. Figure 6 The circuit structures of the first sampling isolation circuit 131, the second sampling isolation circuit 132, and the third sampling isolation circuit 133, each including a sampling resistor R1, a first capacitor C1, a second capacitor C2, and an amplifier Q1, are illustrated below. The sampling resistor R1 in the first sampling isolation circuit 131 is connected in series with the first phase drive circuit of the three-phase drive circuit 111b to acquire the AC signal of the first phase drive circuit. The sampling resistor R1 in the second sampling isolation circuit 132 is connected in series with the second phase drive circuit of the three-phase drive circuit 111b to acquire the AC signal of the second phase drive circuit. The sampling resistor R1 in the third sampling isolation circuit 133 is connected in series with the third phase drive circuit of the three-phase drive circuit 111b to acquire the AC signal of the third phase drive circuit. The main control circuit 121 is used to control the three-phase drive circuit 111b to stop working when the voltage of any received AC signal from any phase drive circuit is greater than a first preset voltage and / or the current is greater than a first preset current.

[0060] In this embodiment, the number of sampling isolation circuits 130 can be set according to the actual number of circuits to be detected. The sampling resistor R1 in each sampling isolation circuit 130 can detect the voltage / current of one phase drive circuit, and transmit and isolate the voltage / current through the first capacitor C1 and the second capacitor C2. Thus, the main control circuit 121 can determine the three-phase voltage / current through the three sampling isolation circuits 130 respectively. If any one of the three phases has an abnormal voltage / current, the three-phase motor 111a and the three-phase drive circuit 111b are controlled to stop working.

[0061] In one embodiment, the first load 111 may be a compressor located on the high-pressure side. The compressor is electrically connected to the main control circuit 121, which controls the operation of the compressor. The compressor is point-connected to the first terminal of the first capacitor C1 and the first terminal of the second capacitor C2, respectively, and the first capacitor C1 and the second capacitor C2 are used to transmit the AC signal of the compressor to the main control circuit 121.

[0062] In one embodiment, the first load 111 may be a heater located on the high-voltage side. The heater is electrically connected to the main control circuit 121, which controls the operation of the heater. The heater is electrically connected to the first terminal of the first capacitor C1 and the first terminal of the second capacitor C2, respectively, and the first capacitor C1 and the second capacitor C2 are used to transmit the AC signal of the heater to the main control circuit 121.

[0063] In one embodiment, the low-pressure side circuit 120 includes one or more of a water pump, a multi-way valve, and an expansion valve. The water pump is electrically connected to the main control circuit 121, which controls the operation of the water pump. The multi-way valve is electrically connected to the main control circuit 121, which controls the operation of the multi-way valve. The expansion valve is electrically connected to the main control circuit 121, which controls the operation of the expansion valve.

[0064] For example, control system 100 is a vehicle thermal management system, which may include a compressor, heater, water pump, multi-way valve and expansion valve.

[0065] The main control circuit 121 controls the compressor for cooling and the heater for heating, thereby regulating the temperature inside the vehicle. The main control circuit 121 can also control the water pump, adjusting the flow rate and speed of the coolant to dissipate heat from the battery or other heat-generating components. In the thermal management system, multi-way valves are widely used to connect multiple circuits, such as the battery, motor control system, and air conditioning system, forming a large circulation loop. The main control circuit 121 can control the multi-way valve to open the corresponding circulation loop, achieving efficient energy utilization. The main control circuit 121 can also control the expansion valve for throttling and pressure reduction. Thus, by controlling the compressor, heater, water pump, multi-way valve, and expansion valve through a single main control circuit 121, temperature control inside the vehicle is achieved.

[0066] Reference Figure 7 In one embodiment, the control system 100 further includes a low-voltage side sampling circuit 140. The low-voltage side sampling circuit 140 is electrically connected to the second load 122 and the main control circuit 121, respectively. The low-voltage side sampling circuit 140 is used to detect the operating voltage and / or operating current of the second load 122. The main control circuit 121 is used to control the second load 122 to stop operating when the operating voltage detected by the low-voltage side sampling circuit 140 is greater than a second preset voltage and / or the operating current is greater than a second preset current.

[0067] In this embodiment, the low-voltage side sampling circuit 140 can use a current sampling resistor R1 for current sampling and / or a voltage divider resistor for voltage sampling. The second preset voltage and the second preset current can be set according to actual applications, for example, set to be slightly greater than the operating voltage and operating current of the second load 122. If the low-voltage side sampling circuit 140 detects an abnormality in the operating voltage and / or operating current of the second load 122, it controls the second load 122 to operate to prevent damage to the second load 122.

[0068] In one embodiment, the high-voltage side circuit 110 may further include a first filter circuit for filtering the AC signal of the first load 111. The low-voltage side circuit 120 may further include a second filter circuit for filtering the differential signal transmitted by the first capacitor C1 and the second capacitor C2. The first filter circuit and the second filter circuit may be implemented using capacitors and resistors.

[0069] This application also proposes a vehicle that includes the aforementioned control system 100.

[0070] The detailed structure of the control system 100 can be referred to the above embodiments, and will not be repeated here. It is understood that since the above control system 100 is used in the vehicle of this application, the embodiments of the vehicle of this application include all the technical solutions of all embodiments of the above control system 100, and the technical effects achieved are exactly the same, and will not be repeated here.

[0071] The specific embodiments of this application have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the spirit and scope of this application. All such changes and substitutions fall within the scope defined by this application.

Claims

1. A control system comprising a high side circuit and a low side circuit, the high side circuit comprising a first load, characterized in that, The control system further includes: A sampling isolation circuit, comprising a first capacitor and a second capacitor; a first terminal of the first capacitor is electrically connected to a first terminal of the first load, and a first terminal of the second capacitor is electrically connected to a second terminal of the first load. The low-voltage side circuit includes a main control circuit, and the operating voltage of the main control circuit is lower than the operating voltage of the first load. The main control circuit is also electrically connected to the second terminal of the first capacitor and the second terminal of the second capacitor respectively; the sampling isolation circuit is used to transmit the AC signal of the first load to the main control circuit; the AC signal includes a voltage signal and / or a current signal; the main control circuit is also used to control the first load to stop working when the voltage of the received AC signal is greater than a first preset voltage and / or the current is greater than a first preset current.

2. The control system of claim 1, wherein, The sampling isolation circuit also includes a sampling resistor; The sampling resistor is connected in series with the first load; the first end of the sampling resistor is electrically connected to the first end of the first capacitor, and the second end of the sampling resistor is electrically connected to the first end of the second capacitor; the sampling resistor is used to collect the AC signal of the first load, and the first capacitor and the second capacitor are used to transmit the AC signal to the main control circuit.

3. The control system of claim 1 or 2, wherein, The sampling isolation circuit also includes an amplifier; The first input terminal of the amplifier is electrically connected to the second terminal of the first capacitor; the second input terminal of the amplifier is electrically connected to the second terminal of the second capacitor; the output terminal of the amplifier is electrically connected to the main control circuit; the amplifier is used to convert the AC signal output by the first capacitor and the second capacitor into a single-ended signal and transmit it to the main control circuit.

4. The control system of claim 1, wherein, The number of the first loads is multiple, and the number of the sampling isolation circuits is the same as the number of the first loads.

5. The control system of claim 2, wherein, The first load includes a three-phase motor and a three-phase drive circuit, wherein the three-phase drive circuit is used to drive the three-phase motor to work; The control system includes three sampling isolation circuits, namely a first sampling isolation circuit, a second sampling isolation circuit, and a third sampling isolation circuit. The sampling resistor in the first sampling isolation circuit is connected in series with the first phase driving circuit of the three-phase driving circuit, and is used to collect the AC signal of the first phase driving circuit. The sampling resistor in the second sampling isolation circuit is connected in series with the second phase driving circuit of the three-phase driving circuit, and is used to collect the AC signal of the second phase driving circuit; The sampling resistor in the third sampling isolation circuit is connected in series with the third phase drive circuit of the three-phase drive circuit, and is used to collect the AC signal of the third phase drive circuit. The main control circuit is used to control the three-phase drive circuit to stop working when the voltage of the AC signal received from any one phase drive circuit is greater than a first preset voltage and / or the current is greater than a first preset current.

6. The control system of claim 1, wherein, The first load includes a compressor; The compressor is electrically connected to the main control circuit, and the main control circuit is used to control the operation of the compressor. The compressor is electrically connected to the first terminal of the first capacitor and the first terminal of the second capacitor, respectively. The first capacitor and the second capacitor are used to transmit the AC signal of the compressor to the main control circuit.

7. The control system of claim 1, wherein, The first load includes a heater; The heater is electrically connected to the main control circuit, and the main control circuit is used to control the operation of the heater. The heater is connected to the first terminal of the first capacitor and the first terminal of the second capacitor respectively. The first capacitor and the second capacitor are used to transmit the AC signal of the heater to the main control circuit.

8. The control system of claim 1, wherein, The low-pressure side circuit also includes a second load, which includes one or more of a water pump, a multi-way valve, and an expansion valve. The water pump is electrically connected to the main control circuit, and the main control circuit is used to control the operation of the water pump; The multi-way valve is electrically connected to the main control circuit, and the main control circuit is used to control the operation of the multi-way valve. The expansion valve is electrically connected to the main control circuit, and the main control circuit is used to control the operation of the expansion valve.

9. The control system of claim 1, wherein, The low-voltage side circuit also includes a second load, and the control system also includes a low-voltage side sampling circuit. The low-voltage side sampling circuit is electrically connected to the second load and the main control circuit respectively; the low-voltage side sampling circuit is used to detect the operating voltage and / or operating current of the second load. The main control circuit is also used to control the second load to stop working when the operating voltage detected by the low-voltage side sampling circuit is greater than the second preset voltage and / or the operating current is greater than the second preset current.

10. A vehicle characterized by comprising: Including the control system as described in any one of claims 1 to 9.

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