Integrated controller, low-voltage electrical system and power supply method and control method therefor

Abstract

The present invention relates to the technical field of low-voltage electrical systems for electric vehicles. Disclosed are an integrated controller, a low-voltage electrical system and a power supply method and a control method therefor. The low-voltage electrical system comprises an integrated controller, and the integrated controller comprises a control module and a transfer module; the control module comprises a sensing signal input end and a control signal output end; the transfer module comprises a signal forwarding sub-module and a first voltage conversion unit; the signal forwarding sub-module is used for forwarding a control signal generated by the control module to a controlled device; the first voltage conversion unit is used for inputting a power supply voltage and converting the voltage level of the power supply voltage to the voltage level of the working voltage of an electric device; and the electric device comprises the control module and the controlled device. According to the present invention, by means of the combination of the control module and the transfer module, the circuit structure is simplified, the cost is reduced, and the ability to resist electromagnetic interference is improved. The function of controlling different types of low-voltage electrical equipment while supplying power to the different types of low-voltage electrical equipment is achieved.

Description

Integrated controller, low-voltage electrical system, power supply method and control method thereof Technical Field

[0001] The invention belongs to the technical field of electric vehicles and relates to a low-voltage electrical system in an electric vehicle. Background Art

[0002] Electric vehicle electrical systems can be divided into high-voltage and low-voltage systems based on voltage levels. Low-voltage systems generally use a DC 12V or 24CV power supply. Low-voltage systems primarily consist of a controller and several low-voltage electrical devices. These devices are numerous and diverse, requiring complex circuits to connect them. Summary of the Invention

[0003] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art and to provide an integrated controller that has the functions of supplying power to low-voltage electrical equipment and controlling low-voltage electrical equipment.

[0004] The present invention is achieved through the following technical solutions: an integrated controller, comprising a control module and a transfer module;

[0005] The control module has a sensing signal input terminal and a control signal output terminal;

[0006] The transfer module includes: a signal forwarding submodule and a first voltage conversion unit;

[0007] The signal forwarding submodule is used to forward the control signal generated by the control module to the controlled device;

[0008] The first voltage conversion unit is used to input a power supply voltage and convert the voltage level of the power supply voltage into the voltage level of an operating voltage of an electrical device; the electrical device includes the control module and the controlled device.

[0009] Furthermore, the control module and the transfer module are connected via a first low-voltage connector, and the first low-voltage connector integrates a signal pin and a power supply pin.

[0010] Furthermore, the signal pin includes a CAN signal pin;

[0011] The signal forwarding submodule includes a CAN signal forwarding unit;

[0012] The CAN signal forwarding unit receives the CAN signal in the control signal generated by the control module through the CAN signal pin.

[0013] Furthermore, the signal pin includes a switch signal pin;

[0014] The signal forwarding submodule includes a switch signal forwarding unit;

[0015] The switch signal forwarding unit receives the switch signal in the control signal generated by the control module through the switch signal pin, and forwards the switch signal to the switch circuit;

[0016] The switch circuit is used to output the operating voltage converted by the first voltage conversion unit to a controlled device controlled by a switch signal, and the switch circuit can be turned on or off when receiving the switch signal.

[0017] Furthermore, the transfer module also includes a current monitoring unit for monitoring the output current of the first voltage conversion unit.

[0018] Furthermore, the control module includes: a main control chip, a second voltage conversion unit;

[0019] The main control chip is connected in parallel with the second voltage conversion unit to obtain a voltage equal to the voltage input to the control module;

[0020] The second voltage conversion unit is used to convert the voltage input to the control module into an operating voltage of the sensor.

[0021] Furthermore, it also includes a second low-voltage connector;

[0022] The first end of the second low-voltage connector is arranged on the integrated controller; the first end of the second low-voltage connector is provided with a sensor signal input pin, a sensor power output pin, a controlled device power output pin and a control signal output pin, which are respectively used to electrically connect the sensor signal input end of the control module, the power output end of the second voltage conversion unit, the voltage output end of the first voltage conversion module and the signal output end of the signal forwarding submodule.

[0023] The present invention also provides a low-voltage electrical system, including the integrated controller of the present invention, wherein the transfer module of the integrated controller inputs the power supply voltage and outputs the working voltage to each electrical device; the control module of the integrated controller inputs the sensor signal of the sensor and can control each controlled device according to the sensor signal.

[0024] Furthermore, the sensor includes an eddy current sensor and a pressure sensor;

[0025] The controlled equipment includes an electronic oil pump and a motor;

[0026] The control module is used to generate a CAN signal according to a sensing signal of the eddy current sensor to control the motor, and is used to generate a CAN signal according to a sensing signal of the pressure sensor to control the electronic oil pump.

[0027] Furthermore, the controlled device also includes a solenoid valve, and the control module controls the opening and closing of the solenoid valve by generating a switching signal.

[0028] Furthermore, the controlled device is connected to the second end of the second low-voltage connector via a wiring harness or a flat cable;

[0029] The wiring harness or cable arrangement includes signal lines and power supply lines;

[0030] The second end of the second low-voltage connector is plugged into the first end of the second low-voltage connector on the integrated controller.

[0031] The present invention also provides a method for powering a low-voltage electrical system of the present invention, comprising the following steps:

[0032] The power supply voltage is converted into the operating voltage of each controlled device through the first voltage conversion unit in the transfer module, and then output to the controlled device through the second low-voltage connector, the wiring harness or the cable in sequence;

[0033] The input voltage of the control module is converted into the operating voltage of the sensor by the second voltage conversion unit in the control module, and then output to the sensor through the second low-voltage connector, the wiring harness or the flat cable in sequence.

[0034] The present invention also provides a control method for a low-voltage electrical system of the present invention, comprising the following steps:

[0035] The control signal generated by the control module is sent to the signal forwarding submodule in the transfer module, and the signal forwarding submodule then outputs the signal to the controlled device through the second low-voltage connector and the wiring harness or cable.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention simplifies the circuit structure, reduces costs, and improves anti-electromagnetic interference capability by combining a control module with a transfer module. The present invention realizes the function of controlling different types of low-voltage electrical equipment while supplying power to them. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is an architecture diagram of a low-voltage electrical system in the prior art;

[0039] FIG2 is an architecture diagram of the integrated controller in Example 1;

[0040] FIG3 is a wiring diagram of the integrated controller in Example 3;

[0041] FIG4 is an architecture diagram of a low-voltage electrical system in Example 4. DETAILED DESCRIPTION

[0042] In the prior art, a low-voltage electrical system is mainly composed of a controller and a number of low-voltage electrical devices. There are many types and quantities of low-voltage electrical devices, and currently complex circuits are required to connect the low-voltage electrical devices.

[0043] As shown in Figure 1, low-voltage electrical equipment includes motors (such as various electronic oil pumps, parking motors, and shift motors), sensors (including pressure sensors and eddy-current sensors), and solenoid valves. Different types of low-voltage electrical equipment require different voltage levels. Motors require a 12V operating voltage, while sensors and solenoid valves require a 5V operating voltage.

[0044] In order to meet the requirements of different voltage levels, the existing technology directly provides 12V power supply voltage to low-voltage electrical equipment such as motors through power supply lines. Therefore, each low-voltage electrical equipment such as motors must be equipped with corresponding power supply lines, which leads to a large number of power supply lines and complicated wiring.

[0045] In addition, different types of low-voltage electrical equipment require different types of control signals. Among them, motors require CAN signals for control, while solenoid valves require switch signals for control. Therefore, different controllers need to be configured to control them separately. As shown in Figure 1, a motor controller and a transmission controller are used for control respectively.

[0046] However, the integrated controller provided by the present invention can simultaneously supply power to different types of low-voltage electrical equipment and can control different types of low-voltage electrical equipment, thereby simplifying the circuit structure and reducing costs.

[0047] The following is a further detailed description with reference to the accompanying drawings.

[0048] Referring to FIG2 , an integrated controller includes a control module and a transfer module;

[0049] The control module has a sensing signal input terminal and a control signal output terminal;

[0050] The transfer module includes: a signal forwarding submodule and a first voltage conversion unit;

[0051] The signal forwarding submodule is used to forward the control signal generated by the control module to the controlled device;

[0052] The first voltage conversion unit is used to input a power supply voltage and convert the voltage level of the power supply voltage into the voltage level of an operating voltage of an electrical device; the electrical device includes the control module and the controlled device.

[0053] In this specific implementation, the control module may be an MCU controller, a PLC controller, a control board, etc.

[0054] In this specific embodiment, the first voltage conversion unit uses a DC-DC chip, and multiple DC-DC chips are configured according to the type of required voltage level. For example, if the power supply voltage is 24V and the required working voltages include 3.3V, 5V and 12V, then three DC-DC chips are correspondingly configured in the first voltage conversion unit to convert the 24V power supply voltage into 3.3V, 5V and 12V respectively.

[0055] In this specific implementation, the transfer module further includes a current monitoring unit for monitoring the output current of the first voltage conversion unit.

[0056] In this specific embodiment, the relay module also includes a low-voltage connection board (a type of printed circuit board). The low-voltage connection board serves the same function as the printed circuit board, supporting and connecting the various electronic components. Specifically, the low-voltage connection board connects the various electronic components via conductive traces to enable signal transmission and energy conversion between the electronic components. The signal forwarding submodule, first voltage conversion unit, and current monitoring unit in the relay module are each electrically connected to the low-voltage connection board.

[0057] Example 1

[0058] To simplify internal wiring in the integrated controller, this embodiment uses a low-voltage connector to connect the control module and the relay module. Specifically, the control module and the relay module are connected via a first low-voltage connector, which integrates signal pins and power pins. The pins of a low-voltage connector are also called pins.

[0059] The first low-voltage connector includes a female end and a male end, which are respectively connected to the control module and the transfer module. For example, the signal line (the signal line here refers to the conductive signal pattern printed on the low-voltage connection board) and the power supply line (the power supply line here refers to the conductive power supply pattern printed on the low-voltage connection board) on the transfer module are respectively electrically connected to one end of the pin on the male end, and the other end of the pin on the male end is connected to the corresponding pin on the female end by plugging. In this way, the control module and the transfer module do not need to be connected by wires. The low-voltage connector belongs to the existing technology and will not be described here.

[0060] The signal pin includes a CAN signal pin, the signal forwarding submodule includes a CAN signal forwarding unit, and the CAN signal forwarding unit receives a CAN signal in the control signal generated by the control module through the CAN signal pin.

[0061] The signal pin includes a switch signal pin, and the signal forwarding submodule includes a switch signal forwarding unit. The switch signal forwarding unit receives the switch signal in the control signal generated by the control module through the switch signal pin, and forwards the switch signal to the switching circuit. The switching circuit is used to output the working voltage converted by the first voltage conversion unit to the controlled device controlled by the switch signal, and the switching circuit can be connected or disconnected when receiving the switch signal.

[0062] A switching signal refers to the two states of a switch: open and closed. Turning on a controllable switch (such as a thyristor or transistor) in a switching circuit connects the circuit, allowing the device controlled by the switching signal to operate. Turning off the controllable switch disconnects the circuit, causing the device controlled by the switching signal to stop operating.

[0063] Referring to Figure 2, the dotted line in the figure represents the signal line, the solid line represents the power supply line, the controlled device A in the figure represents the controlled device controlled by the switch signal, such as a solenoid valve, and the controlled device B in the figure represents the controlled device controlled by the CAN signal, such as a motor.

[0064] The signal forwarding submodule forwards CAN signals and switch signals through the CAN signal forwarding unit and the switch signal forwarding unit respectively, avoiding conflicts when forwarding CAN signals and switch signals at the same time, and making the control more reliable.

[0065] The CAN signal generated by the control module is a digital signal. The CAN signal forwarding unit then converts the digital CAN signal into a differential voltage signal. The differential voltage signal has a large fault tolerance range, so the CAN signal has strong anti-interference performance during the transmission process.

[0066] The switch signal generated by the control module is a digital signal ("1" or "0"), and the switch forwarding unit converts the switch signal in the form of a digital signal into a high level or low level signal. The controllable switch in the switch circuit is turned on at a high level and closed at a low level. The high level or low level signal

[0067] Example 2

[0068] Motors require a large driving current, and solenoid valves generate a large current when in operation, which makes them prone to electromagnetic interference. The analog signals generated by sensors are susceptible to electromagnetic interference during transmission.

[0069] To reduce electromagnetic interference from motors and solenoid valves on low-voltage sensor-type electrical equipment, this embodiment uses a control module to independently power the sensors. Specifically, the control module includes a main control chip and a second voltage conversion unit. The main control chip and the second voltage conversion unit are connected in parallel to obtain a voltage equal to the voltage input to the control module. The second voltage conversion unit is used to convert the voltage input to the control module into the operating voltage of the sensor. This embodiment uses a DC-DC chip as the second voltage conversion unit.

[0070] When the second voltage conversion unit is connected in parallel with the main control chip, the first voltage conversion unit can power the control module according to the voltage level of the main control chip. That is, the voltage level of the input control module is the voltage level of the main control chip. The parallel connection of the second voltage conversion unit and the main control chip does not change the voltage level of the input control module, thus ensuring the reliability of the power supply to the main control chip. If the second voltage conversion unit is connected in series with the main control chip, due to voltage division, it will not be able to meet the voltage level requirements of the main control chip, or a complex circuit design will be required to meet the voltage level requirements of the main control chip.

[0071] Example 3

[0072] Different external low-voltage electrical devices are installed in different locations and at different distances from the integrated controller, and therefore require cables of different lengths to connect to the integrated controller. To simplify the wiring between the integrated controller and the external low-voltage electrical devices, this embodiment uses a second low-voltage connector based on Example 2.

[0073] Specifically, the second low-voltage connector includes a first end and a second end, the first end and the second end are electrically connected by plugging, and the first end of the second low-voltage connector is mounted on the integrated controller.

[0074] As shown in Figure 3, in this embodiment, the first end (female end) of the second low-voltage connector is mounted on the integrated controller. The female end of the second low-voltage connector is equipped with sensor signal input pins, sensor power output pins, controlled device power output pins, and control signal output pins. The male end of the second low-voltage connector is connected to the sensor and controlled device via a wiring harness or flat cable.

[0075] The sensor signal input end of the main control chip in the control module within the integrated controller is connected to the inner end of the sensor signal input pin through a signal line; the power output end of the second voltage conversion unit of the control module is connected to the inner end of the sensor power output pin through a wire.

[0076] The power output end of the first voltage conversion unit of the transfer module in the integrated controller is connected to the inner end of the power output pin of the controlled device through a wire; the signal forwarding submodule of the transfer module is connected to the inner end of the control signal output pin through a signal line

[0077] More specifically, the control signal output pins include: a CAN signal output pin and a switch signal output pin; the CAN signal forwarding unit is connected to the inner end of the CAN signal output pin through a signal line, and the switch signal forwarding unit is connected to the inner end of the switch signal output pin through a signal line.

[0078] The second end of the second low-voltage connector (the male end of the second low-voltage connector) is connected to the sensor and the controlled device through a wiring harness or a flat cable. Both the wiring harness and the flat cable combine multiple signal lines and power lines to form a whole. The wiring harness generally wraps multiple signal lines and power lines together, and the appearance is only one thicker line. The flat cable puts multiple signal lines and power lines side by side, and the appearance looks wide and flat.

[0079] Specifically, a jack corresponding to the pin on the female end of the second low-voltage connector is provided on the male end of the second low-voltage connector, and the inner wall and bottom of the jack are made of conductive material. The signal line, power supply line of the sensor and the signal line and power supply line of the controlled device are integrated into a wiring harness or a cable, and are correspondingly connected to the bottom of the jack of the male end of the second low-voltage connector. In this way, after the pin of the female end of the second low-voltage connector is inserted into the jack of the male end of the second low-voltage connector, the electrical connection between the integrated controller and the external low-voltage electrical equipment is completed, the wiring is simple, and the connection is convenient.

[0080] Example 4

[0081] Referring to Figure 3, this embodiment provides a low-voltage electrical system, including the integrated controller of Example 3, wherein the transfer module of the integrated controller is used to input the power supply voltage and output the working voltage to each electrical device; the control module of the integrated controller is used to input the sensor signal of the sensor and can control each controlled device according to the sensor signal.

[0082] The low-voltage electrical system of this embodiment is suitable for the low-voltage electrical architecture modification of a hybrid DHT (Dedicated Hybrid Transmission) hybrid dedicated transmission, and is also suitable for a pure electric vehicle drive system with oil cooling, two gears, parking brake and other related devices.

[0083] This embodiment is specifically described by taking the low-voltage electrical system of a hybrid DHT as an example.

[0084] The sensors include an eddy current sensor and a pressure sensor, and the controlled device includes an electronic oil pump and a motor; the control module is used to generate a CAN signal based on the sensing signal of the eddy current sensor to control the motor, and is also used to generate a CAN signal based on the sensing signal of the pressure sensor to control the electronic oil pump.

[0085] The electronic oil pump includes a lubrication electronic oil pump and a pressure electronic oil pump. The lubrication electronic oil pump is used to provide lubrication pressure to the entire DHT system; the pressure electronic oil pump is used to provide pressure to the DHT hydraulic system.

[0086] The motor includes a parking motor and a shift motor. The parking motor is used to lock the DHT gear to achieve the parking effect; the shift motor is used to drive the shift fork to achieve gear switching.

[0087] The lubrication electronic oil pump, pressure electronic oil pump, parking motor and shift motor all require a 12V operating voltage. Since the power supply voltage used in this embodiment is 12V, a voltage stabilizing chip can be added to the transfer module, and the voltage is stabilized by the voltage stabilizing chip and then output to the parking motor and shift motor; or the voltage stabilizing chip can be omitted, and the transfer module only provides 12V voltage output contacts, which can save a DC-DC chip.

[0088] Since the motor controller is located near the DHT, the distance between the motor controller and the lubrication electronic oil pump, pressure electronic oil pump, parking motor, and shift motor is relatively short. In this embodiment, the transmission controller is removed and the motor controller is retained. Integration is performed based on the motor controller (i.e., the low-voltage connection board is combined with the control board of the motor controller), which can greatly reduce the length of the wiring harness.

[0089] The controlled device also includes a solenoid valve. The control module generates a switching signal to control the opening and closing of the solenoid valve. The solenoid valve is used to control the DHT oil circuit, thereby achieving oil circuit control (such as gear shifting, clutch control, cooling / lubrication flow regulation, etc.). The solenoid valve is controlled by a switching signal and is closed / opened when the power is turned on.

[0090] The working voltage of the solenoid valve is 5V, so a DC-DC chip is needed to convert the 12V power supply voltage into 5V.

[0091] The controlled device is connected to the male or female end of the second low-voltage connector through a wiring harness or a cable. The wiring harness or cable includes a signal line and a power supply line. The male or female end is then connected to the female or male end of the second low-voltage connector on the integrated controller.

[0092] Example 5

[0093] Based on Example 4, this embodiment provides a power supply method for a low-voltage electrical system, comprising the following steps:

[0094] The power supply voltage is converted into the operating voltage of each controlled device through the first voltage conversion unit in the transfer module, and then output to the controlled device through the second low-voltage connector, the wiring harness or the cable in sequence;

[0095] The input voltage of the control module is converted into the operating voltage of the sensor by the second voltage conversion unit in the control module, and then output to the sensor through the second low-voltage connector, the wiring harness or the flat cable in sequence.

[0096] The power supply method of this embodiment avoids electromagnetic interference caused by the controlled device to the sensor for the following reasons:

[0097] The drive current required by motors and solenoid valves is greater than the operating current required by sensors. For sensors, the drive current required by motors or solenoid valves is considered "high current." If the sensor is powered by the first voltage conversion unit in the relay module, the large electromagnetic interference signal generated by the first voltage conversion unit outputting "high current" to the motor or solenoid valve (when the current is increased from zero to high, causing electromagnetic induction) can easily be input to the sensor through the power supply line between the relay module and the sensor.

[0098] However, in this embodiment, the sensor is powered solely by the second voltage conversion unit in the control module. The control module does not output a large current, but continuously and stably outputs the working current to the sensor without a sudden change in current. Therefore, the control module will not output an interference signal to the sensor, thereby avoiding electromagnetic interference caused by the controlled device to the sensor.

[0099] Example 6

[0100] Based on Example 4, this embodiment provides a control method for a low-voltage electrical system, comprising the following steps:

[0101] The control signal generated by the control module is sent to the signal forwarding submodule in the transfer module, and the signal forwarding submodule then outputs the signal to the controlled device through the second low-voltage connector, the wiring harness or the flat cable.

[0102] The control method of this embodiment realizes controlling controlled devices of different voltage levels by using the same controller.

[0103] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0104] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0105] The above technical solutions are only specific implementation methods of the present invention. For those skilled in the art, it is easy to make various types of improvements or modifications based on the principles disclosed in the present invention, and are not limited to the technical solutions described in the above specific embodiments of the present invention. Therefore, the above description is only preferred and does not have a restrictive meaning.

Claims

1. An integrated controller, characterized in that: It includes a control module and a transfer module; The control module has a sensing signal input terminal and a control signal output terminal; The transfer module includes: a signal forwarding sub-module, a first voltage conversion unit; The signal forwarding sub-module is used to forward the control signal generated by the control module to the controlled device; The first voltage conversion unit is used to input the power supply voltage and convert the voltage level of the power supply voltage to the voltage level of the working voltage of the electrical equipment; the electrical equipment includes the control module and the controlled device.

2. The integrated controller according to claim 1, characterized in that: The control module and the transfer module are connected through a first low-voltage connector, and the first low-voltage connector integrates signal pins and power supply pins.

3. The integrated controller according to claim 2, characterized in that: The signal pins include CAN signal pins; The signal forwarding sub-module includes a CAN signal forwarding unit; The CAN signal forwarding unit receives the CAN signal in the control signal generated by the control module through the CAN signal pin.

4. The integrated controller according to claim 2, wherein: The signal pins include digital input signal pins; The signal forwarding sub-module includes a digital input signal forwarding unit; The digital input signal forwarding unit receives the digital input signal in the control signal generated by the control module through the digital input signal pin and forwards the digital input signal to the switch circuit; The switch circuit is used to output the working voltage converted by the first voltage conversion unit to the controlled device controlled by the digital input signal, and the switch circuit can be turned on or off when receiving the digital input signal.

5. The integrated controller according to claim 1, wherein: The transfer module further includes a current monitoring unit for monitoring the output current of the first voltage conversion unit.

6. The integrated controller according to any one of claims 1 to 5, characterized in that: The control module includes: a main control chip, a second voltage conversion unit; The main control chip is connected in parallel with the second voltage conversion unit to obtain a voltage equal to the voltage input to the control module; The second voltage conversion unit is used to convert the voltage input to the control module into the working voltage of the sensor.

7. The integrated controller according to claim 6, wherein: It further includes a second low-voltage connector; The first end of the second low-voltage connector is arranged on the integrated controller; on the first end of the second low-voltage connector, there are a sensor signal input pin, a sensor power supply output pin, a controlled device power supply output pin and a control signal output pin, which are respectively used for electrically connecting the sensing signal input terminal of the control module, the power supply output terminal of the second voltage conversion unit, the voltage output terminal of the first voltage conversion module and the signal output terminal of the signal forwarding sub-module.

8. A low-voltage electrical system, characterized in that: It includes the integrated controller as claimed in claim 7, and the transfer module of the integrated controller is used to input the power supply voltage and output the working voltage to each electrical equipment; the control module of the integrated controller is used to input the sensing signal of the sensor and can control each controlled device according to the sensing signal.

9. The low-voltage electrical system according to claim 8, wherein: The sensor includes an eddy current sensor and a pressure sensor; The controlled device includes an electronic oil pump and a motor; The control module is used to generate a CAN signal according to the sensing signal of the eddy current sensor to control the motor, and is used to generate a CAN signal according to the sensing signal of the pressure sensor to control the electronic oil pump.

10. The low-voltage electrical system according to claim 9, characterized in that: The controlled device further includes a solenoid valve, and the control module controls the opening and closing of the solenoid valve by generating a digital input signal.

11. The low-voltage electrical system according to claim 10, characterized in that: The controlled device is connected to the second end of the second low-voltage connector through a wire harness or a flat cable; The wire harness or flexible printed circuit includes a signal line and a power supply line; The second end of the second low-voltage connector is plugged into the first end of the second low-voltage connector on the integrated controller.

12. A power supply method for a low-voltage electrical system as described in claim 11, characterized in that: Comprising the following steps: The power supply voltage is converted into the operating voltage of each controlled device by the first voltage conversion unit in the transfer module, and then output to the controlled device through the second low-voltage connector and the wire harness or flexible printed circuit in sequence; The input voltage of the control module is converted into the operating voltage of the sensor by the second voltage conversion unit in the control module, and then output to the sensor through the second low-voltage connector and the wire harness or flexible printed circuit in sequence.

13. A control method for a low-voltage electrical system as claimed in claim 11, characterized in that: Comprising the following steps: The control signal generated by the control module is sent to the signal forwarding sub-module in the transfer module, and the signal forwarding sub-module then outputs it to the controlled device through the second low-voltage connector and the wire harness or flexible printed circuit in sequence.

Images