Electric vehicle heating control device

Abstract

The utility model provides a heating control device for an electric vehicle. The heating control device comprises a vehicle end central controller, a heating control box, a converter and a plurality of heating devices. Two-way communication is established between the vehicle end central controller and the heating control box, the heating control box is externally connected with an NTC thermistor and used for sensing the external environment temperature, and the vehicle end central controller is further connected with the heating control box through a converter and used for providing power supply for the heating control box; and the heating control box is connected with a plurality of heating devices and is used for performing heating control on the plurality of heating devices. According to the heating control device of the electric vehicle, a monitoring mechanism can be flexibly triggered, the safety of components and parts of the whole vehicle is effectively improved, meanwhile, no harm is caused to the human body, and high safety and stability are achieved.

Description

Technical Field

[0001] This application belongs to the field of electric vehicle heating control technology, and in particular relates to an electric vehicle heating control device. Background Technology

[0002] Currently, most heating control architectures used in the market send heating control commands to the cloud via mobile clients or mini-programs. The cloud then forwards the received commands to the vehicle's central controller. The central controller then opens the heating path of the relevant heating equipment via communication or hard-wired direct drive, and starts heating timing, thereby realizing the heating process of the vehicle's equipment.

[0003] The current heating control architecture lacks a monitoring mechanism, so when abnormal temperatures occur, the components themselves are easily damaged, or even the entire vehicle parts are burned out, causing serious safety accidents. At the same time, the power supply of the existing heating control architecture mostly comes from the battery power (48V or 60V). Since the battery power voltage is high, when the battery is abnormal, direct contact with the heating equipment can cause great harm to the human body, posing a significant safety hazard. Utility Model Content

[0004] In view of this, the present application aims to provide a heating control device for electric vehicles to solve at least one of the above-mentioned problems.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] This application provides a heating control device for an electric vehicle, comprising:

[0007] Vehicle-mounted central control unit, heating control box, converter, and multiple heating devices;

[0008] The vehicle-mounted central controller establishes bidirectional communication with the heating control box. The heating control box is externally connected to an NTC thermistor for sensing the ambient temperature. The vehicle-mounted central controller is also connected to the heating control box via a converter to provide power to the heating control box.

[0009] The heating control box is connected to multiple heating devices and is used to control the heating of the multiple heating devices.

[0010] Furthermore, the heating control box includes a main control microcontroller, and a power module, a communication module, and a heating control on / off module connected to the main control microcontroller. The power module is connected to the converter, the communication module is connected to the vehicle-side central controller, and is used to establish instruction communication between the vehicle-side central controller and the main control microcontroller. The heating control on / off module is connected to the heating equipment and is used to control the on / off state of the heating equipment.

[0011] Furthermore, the first pin of the main control microcontroller is connected to the power module through the ninth resistor. The power module is used to convert the 12V voltage output by the converter into 5V voltage and to provide power to each module.

[0012] Furthermore, the communication module includes a communication interface circuit composed of a seventh switch, an eighth switch, and a ninth switch;

[0013] The first terminal of the seventh switch is connected to the second pin of the main control microcontroller through the thirty-fifth resistor, the second terminal of the seventh switch is connected to the first terminal of the eighth switch through the thirty-seventh resistor, and the third terminal of the seventh switch is connected to the 5V power supply terminal.

[0014] The second terminal of the eighth switch is connected to the eleventh pin of the main control microcontroller through the series connection of the thirty-third, thirty-fourth, and fourteenth resistors. The second terminal of the eighth switch is also connected to the vehicle-end central controller. A fourth Zener diode and a thirty-sixth resistor are connected between the thirty-third and thirty-fourth resistors. The second terminal of the fourth Zener diode is grounded, and the other terminal of the thirty-sixth resistor is grounded. The third terminal of the eighth switch is connected to the first terminal of the ninth switch through the fortieth resistor.

[0015] The second terminal of the ninth switch is connected to the fifteenth pin of the main control microcontroller and a 5V voltage source through the thirty-ninth resistor, respectively, and the third terminal of the ninth switch is grounded.

[0016] Furthermore, the seventh switch is a PNP transistor, and the eighth and ninth switches are NPN transistors.

[0017] Furthermore, the heating control on / off module includes multiple on / off units, one of which includes a fifth switching transistor. The first end of the fifth switching transistor is connected to the seventh pin of the main control microcontroller through a twenty-first resistor and grounded through a twenty-second resistor. The second end of the fifth switching transistor is connected to the heating device and is also grounded through an eleventh capacitor. The third end of the fifth switching transistor is connected to the ninth pin of the main control microcontroller and is also grounded through a thirty-first resistor.

[0018] Furthermore, the fifth switch is an NMOS transistor.

[0019] Furthermore, the sixth pin of the main control microcontroller is connected to the NTC thermistor via the NTC detection module.

[0020] Compared with the prior art, the electric vehicle heating control device described in this application has the following advantages:

[0021] The electric vehicle heating control device described in this application, through the cooperation of a vehicle-side central controller, a heating control box, a converter, an NTC thermistor, and multiple heating devices, can control the heating operation of the heating devices in real time based on the collected external ambient temperature. It can flexibly trigger the monitoring mechanism, effectively improving the safety of components and vehicle parts. In addition, based on the converter connected between the central controller and the heating control box, the operating voltage is controlled at 12V, which complies with the voltage range under the new regulations. Even in the event of an accident, it will not cause harm to the human body, and has high safety and stability. Experimental verification shows that it has strong promotional value. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a block diagram of an electric vehicle heating control device according to an embodiment of this application;

[0024] Figure 2 This is a circuit diagram of the power module described in an embodiment of this application;

[0025] Figure 3 This is a circuit diagram of the main control microcontroller described in the embodiments of this application;

[0026] Figure 4 This is a circuit diagram of the communication module described in an embodiment of this application;

[0027] Figure 5 This is a circuit diagram of the heating control on / off module described in an embodiment of this application;

[0028] Figure 6 This is a circuit diagram of the NTC detection module described in an embodiment of this application. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0030] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] Please see Figure 1 As shown, this embodiment provides an electric vehicle heating control device, including:

[0032] Vehicle-mounted central control unit, heating control box, converter, and multiple heating devices;

[0033] Two-way communication is established between the vehicle-side central controller and the heating control box. The heating control box is externally connected to an NTC thermistor to sense the ambient temperature. The vehicle-side central controller is also connected to the heating control box through a converter to provide power to the heating control box.

[0034] The heating control box connects to multiple heating devices and is used to control the heating of these devices.

[0035] Specifically, in this embodiment, the central controller is connected to the vehicle power supply and is normally powered. When the central controller receives a heating control command, it connects ACC2 to the vehicle power supply. ACC2 is the "auxiliary power supply" for the vehicle's heating system only, and it is responsible for providing power to the heating control box.

[0036] When ACC2 is turned on, the central controller sends instructions to the heating control box via the "two-way communication" line and heats the subsequent equipment. The NTC thermistor connected to the heating control box is responsible for sensing the ambient temperature and feeding it back to the heating control box in real time. The heating control box then performs subsequent heating actions and maintains the temperature based on the feedback status.

[0037] The electric vehicle heating control device described in this embodiment, through the cooperation of a vehicle-side central controller, a heating control box, a converter, an NTC thermistor, and multiple heating devices, can control the heating operation of the heating devices in real time based on the collected external ambient temperature. It can flexibly trigger the monitoring mechanism, effectively improving the safety of components and vehicle parts. In addition, based on the converter connected between the central controller and the heating control box, the operating voltage is controlled at 12V, which complies with the voltage range under the new regulations. Even in the event of an accident, it will not cause harm to the human body, and has high safety and stability. Experimental verification shows that it has strong promotional value.

[0038] In some implementations, the heating control box includes a main control microcontroller, a power module, a communication module, and a heating control on / off module connected to the main control microcontroller. The power module is connected to a converter, the communication module is connected to the vehicle-side central controller to establish instruction communication between the vehicle-side central controller and the main control microcontroller, and the heating control on / off module is connected to the heating equipment to control the on / off state of the heating equipment.

[0039] Furthermore, the various modules of the heating control box in this embodiment are explained as follows:

[0040] Part 1, Power Module, etc. Figure 2 As shown, the power supply module is the power supply part of the heating control box. It converts the 12V voltage output by the converter into 5V voltage and outputs it to power the main control microcontroller and its peripheral circuits of the control box.

[0041] The 12V power supply (J_VBAT_12V) is converted to VCC_5V through the reverse polarity protection diode D1, current limiting resistors R1 and R2, and transistor Q1;

[0042] Rectification and protection: D1 rectifies and blocks possible reverse current.

[0043] Voltage regulation: The output voltage can be adjusted by the voltage divider bias circuit of R1, R2 and Q1 to provide a suitable supply voltage for subsequent circuits.

[0044] Filtering and smoothing: C1, C2, C3 and C4 work together to remove high-frequency noise and low-frequency fluctuations in the power supply, providing a stable DC power supply to the load.

[0045] Part Two: The main control microcontroller, such as Figure 3 As shown, the main control microcontroller uses the PY32F002BW15S6 chip. The main control microcontroller is the main control part of the heating control box. It completes the instruction communication between (Pin-2) and the host (vehicle-side central controller) and provides effective control for the heating equipment drive.

[0046] Part Three, Communication Module, etc. Figure 4As shown, the communication module is the communication interface circuit between the heating control box and the vehicle-side central controller, enabling instruction exchange between the master and slave devices.

[0047] Specifically, VCC_5V provides a high pull-up level for the communication interface, while ONE_SG_OUT_MCU is the "data output terminal" for sending data from the device. This port is connected to Pin-2 on the main controller. The high and low level changes of the main controller's signal are converted to conduction and closure by transistor Q7, which in turn drives transistor Q8 to conduction and closure, thereby transmitting the high and low levels to "SXT" in the diagram for external devices (vehicle-side central controller) to recognize.

[0048] Additionally, data reception is handled by the "One-Line Input" on the right, which performs level conversion: when the external host interface "SXT" level changes, "ONE_SG_IO_MCU" can simultaneously receive the corresponding signal change to complete data reading. These two parts constitute the single-port data transceiver function of this device.

[0049] Part Four, the heating control on / off module, is shown in Figure 5. In this embodiment, the heating control on / off module of the throttle and seat cushion is used as an example. The heating path can be turned on and off and the power-on time can be realized by sending the corresponding high and low levels to SEAT and HANDLEBAR through the microcontroller I / O port. Furthermore, half-power and full-power heating output modes can be realized through PWM waveform control.

[0050] In some implementations, the sixth pin of the main control microcontroller is connected to an NTC thermistor via an NTC detection module.

[0051] Furthermore, such as Figure 6 As shown, the NTC detection circuit is composed of the 27th resistor R27, the 124th resistor R24, the 17th capacitor C17, and the 18th capacitor C18. The first end of resistor R27 is connected to the sixth pin of the main control microcontroller U1, and the other end is connected to the NTC thermistor through the connection port. One end of resistor R24 ​​is connected to a 5V voltage, and the other end is connected to resistor R27. Capacitors C17 and C18 are respectively placed across resistor R27, and the other ends of capacitors C17 and C18 are grounded.

[0052] In this embodiment, an NTC detection circuit connected to the main control microcontroller is connected to an external NTC thermistor. The NTC thermistor senses the ambient temperature and feeds it back to the heating control box in real time. The heating control box controls whether to heat the heating equipment based on the collected ambient temperature, thereby improving the precision control of the heating equipment.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0054] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A heating control device for an electric vehicle, characterized in that, include: Vehicle-mounted central control unit, heating control box, converter, and multiple heating devices; The vehicle-mounted central controller establishes bidirectional communication with the heating control box. The heating control box is externally connected to an NTC thermistor for sensing the ambient temperature. The vehicle-mounted central controller is also connected to the heating control box via a converter to provide power to the heating control box. The heating control box is connected to multiple heating devices and is used to control the heating of the multiple heating devices.

2. The electric vehicle heating control device according to claim 1, characterized in that: The heating control box includes a main control microcontroller, a power module, a communication module, and a heating control on / off module connected to the main control microcontroller. The power module is connected to the converter, and the communication module is connected to the vehicle-side central controller to establish instruction communication between the vehicle-side central controller and the main control microcontroller. The heating control on / off module is connected to the heating equipment to control the on / off state of the heating equipment.

3. The electric vehicle heating control device according to claim 2, characterized in that: The first pin of the main control microcontroller is connected to the power module through the ninth resistor. The power module is used to convert the 12V voltage output by the converter to 5V voltage and provide power to each module.

4. The electric vehicle heating control device according to claim 2, characterized in that: The communication module includes a communication interface circuit composed of a seventh switch, an eighth switch, and a ninth switch. The first terminal of the seventh switch is connected to the second pin of the main control microcontroller through the thirty-fifth resistor, the second terminal of the seventh switch is connected to the first terminal of the eighth switch through the thirty-seventh resistor, and the third terminal of the seventh switch is connected to the 5V power supply terminal. The second terminal of the eighth switch is connected to the eleventh pin of the main control microcontroller through the series connection of the thirty-third, thirty-fourth, and fourteenth resistors. The second terminal of the eighth switch is also connected to the vehicle-end central controller. A fourth Zener diode and a thirty-sixth resistor are connected between the thirty-third and thirty-fourth resistors. The second terminal of the fourth Zener diode is grounded, and the other terminal of the thirty-sixth resistor is grounded. The third terminal of the eighth switch is connected to the first terminal of the ninth switch through the fortieth resistor. The second terminal of the ninth switch is connected to the fifteenth pin of the main control microcontroller and a 5V voltage source through the thirty-ninth resistor, respectively, and the third terminal of the ninth switch is grounded.

5. The electric vehicle heating control device according to claim 4, characterized in that: The seventh switch is a PNP transistor, and the eighth and ninth switches are NPN transistors.

6. The electric vehicle heating control device according to claim 2, characterized in that: The heating control on / off module includes multiple on / off units, one of which includes a fifth switching transistor. The first end of the fifth switching transistor is connected to the seventh pin of the main control microcontroller through a twenty-first resistor and grounded through a twenty-second resistor. The second end of the fifth switching transistor is connected to the heating device and is also grounded through an eleventh capacitor. The third end of the fifth switching transistor is connected to the ninth pin of the main control microcontroller and is also grounded through a thirty-first resistor.

7. The electric vehicle heating control device according to claim 6, characterized in that: The fifth switch is an NMOS transistor.

8. The electric vehicle heating control device according to claim 2, characterized in that: The sixth pin of the main control microcontroller is connected to the NTC thermistor via the NTC detection module.

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