CN212373100U - New energy automobile PTC heating control system - Google Patents
New energy automobile PTC heating control system Download PDFInfo
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- CN212373100U CN212373100U CN202021865668.XU CN202021865668U CN212373100U CN 212373100 U CN212373100 U CN 212373100U CN 202021865668 U CN202021865668 U CN 202021865668U CN 212373100 U CN212373100 U CN 212373100U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 61
- 238000004891 communication Methods 0.000 claims abstract description 31
- 230000001629 suppression Effects 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 11
- 230000002159 abnormal effect Effects 0.000 description 7
- 238000005485 electric heating Methods 0.000 description 3
- 101100236764 Caenorhabditis elegans mcu-1 gene Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The utility model relates to a new energy automobile PTC heating control system, include: an MCU central processing unit; the CAN bus communication unit is connected with the automobile central control system; the temperature detection unit is connected with the MCU central processing unit and is used for detecting the real-time temperature of the PTC heater; the IGBT control unit is connected with the MCU central processing unit and is used for controlling the PTC heater to work; a PTC voltage detection unit for detecting a voltage signal of the PTC heater; and a power supply unit. The real-time working temperature of the PTC heater is detected by the temperature detection unit, the control signal of the automobile central control system is transmitted through the CAN bus communication unit, the output power of the PTC heater is controlled by the MCU central processing unit through the IGBT control unit according to the control signal, and meanwhile, the working current of the PTC heater is detected in real time through the PTC voltage detection unit, so that the output power of the PTC heater is controlled by the MCU central processing unit in real time, and the centralized control of the PTC heater is realized.
Description
Technical Field
The utility model relates to a new energy automobile technical field, in particular to new energy automobile PTC heating control system.
Background
The traditional automobile can heat and supply the temperature in the automobile by transmitting the waste heat of the engine into the automobile; however, the new energy automobile must be heated by using a special electric heating device through electric energy. The heating devices that can be selected at present include PTC (Positive Temperature Coefficient) elements, heating wires, and electric heating tubes. Since PTC has obvious advantages in the aspects of electric heat conversion rate, safety in use, service life, etc. compared with the heating wire and the electric heating tube, PTC is widely used in new energy vehicles. However, due to the characteristics of the PTC heater and the use limitation of the new energy automobile, the PTC heater must be strictly controlled in the use process in order to meet the use standard of the new energy automobile, and the existing PTC heater has poor centralized control capability and is difficult to meet the increasingly developed requirements in the field of new energy automobiles.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a new energy automobile PTC heating control system has the advantage that improves integrated control can.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a new energy automobile PTC heating control system includes:
an MCU central processing unit;
the CAN bus communication unit is connected with the automobile central control system and is used for transmitting control signals of the automobile central control system;
the temperature detection unit is connected with the MCU central processing unit and used for detecting the real-time temperature of the PTC heater, and the temperature detection unit is connected with a first interface used for being connected with the PTC heater;
the IGBT control unit is connected with the MCU central processing unit and is used for controlling the PTC heater to work;
the PTC current detection unit is connected with the MCU central processing unit and the IGBT control unit and is used for detecting a voltage signal of the PTC heater; and the number of the first and second groups,
a power supply unit for providing an operating voltage.
When the technical scheme is used, the power supply unit provides working voltage for the system, the PTC heater is connected with the first interface, the temperature detection unit detects the real-time working temperature of the PTC heater, the CAN bus communication unit transmits control signals of the automobile central control system, the MCU central processing unit controls the output power of the PTC heater through the IGBT control unit according to the control signals of the automobile central control system, and meanwhile, the PTC current detection unit detects the working current of the PTC heater in real time during working, so that the MCU central processing unit conveniently controls the output power of the PTC heater in real time, and when the working voltage or the working temperature of the PTC processor is abnormal, the MCU central processing unit CAN cut off the work of the PTC heater in time to prevent the damage of the PTC heater, thereby realizing the centralized control of the PTC heater.
As a preferred embodiment of the present invention, the CAN bus communication unit includes:
the second interface is used for being connected with an automobile central control system;
the port electrostatic protection module is connected with the second interface;
the signal interference suppression module is connected with the port electrostatic protection module and used for suppressing interference signals; and the number of the first and second groups,
and the communication processing chip is connected with the signal interference suppression module.
As an optimized scheme of the utility model, the IGBT the control unit includes:
the IGBT driving circuit is connected with the MCU central processing unit and is used for amplifying a control signal of the MCU central processing unit;
and the IGBT switch circuit is connected with the IGBT driving circuit and is connected with the first interface.
According to the technical scheme, the control signal of the MCU central processing unit is amplified through the IGBT drive circuit, the drive work of the IGBT switch circuit is realized, and the switching value is controlled through the IGBT switch circuit, so that the PTC heater is controlled and the output power is adjusted.
As an optimized scheme of the utility model, MCU central processing unit still is connected with IGBT temperature detection module, IGBT temperature detection module is used for detecting IGBT the operating temperature of the control unit of IGBT.
According to the technical scheme, when the temperature of the IGBT control unit is detected to be abnormal, the PTC heater can be timely controlled to be closed through the MCU central processing unit, and the IGBT control unit is prevented from being damaged.
As an optimized scheme of the utility model, MCU central processing unit still is connected with IGBT drive voltage detection module, IGBT drive voltage detection module is used for detecting IGBT drive circuit's drive voltage.
By the technical scheme, when the driving voltage is abnormal, the PTC heater can be controlled to be closed in time through the MCU, so that the IGBT control unit is prevented from being damaged.
As a preferred aspect of the present invention, the PTC current detection unit includes:
the signal amplification module is connected with the IGBT switching circuit;
the current processing module is connected with the MCU and is used for calculating and processing the working voltage of the PTC processor;
and the voltage comparator is connected with the MCU central processing unit and is used for comparing the working voltage of the PTC processor with a preset voltage.
According to the technical scheme, the collected voltage signal of the PTC heater is amplified through the signal amplification module, so that subsequent calculation processing is facilitated, the voltage signal is calculated through the current processing module, the working current and the output power of the PTC heater can be accurately obtained, the calculation result is sent to the MCU central processing unit, so that the MCU central processing unit can accurately control the PTC heater, a certain time is needed for calculation processing of the current processing module, the voltage signal of the PTC heater is compared with the preset voltage through the voltage comparator, and when the voltage signal is larger than the preset voltage, the MCU central processing unit can timely control the PTC heater to be turned off, and the timeliness of fault processing is improved.
As a preferred aspect of the present invention, the power supply unit includes: the IGBT driving power supply module is connected with the IGBT driving circuit.
As an optimized scheme of the utility model, power module still includes logic circuit power module and CAN communication power module, logic circuit power module with power control chip is connected, CAN communication power module with the communication is handled the chip and is connected.
According to the technical scheme, each functional module is isolated and powered through the IGBT driving power module, the logic circuit power module and the CAN communication power module, and the power supply stability is improved.
As an optimized scheme of the utility model, first interface connection has the PTC power supply detecting element who is used for detecting the supply voltage of PTC heater, PTC power supply detecting element's output with MCU central processing unit is connected.
As a preferred aspect of the present invention, the PTC power supply detection unit includes:
the high-voltage filtering module is connected with the first interface; and the number of the first and second groups,
and the power supply detection module is modularly connected with the high-voltage filter and is connected with the MCU.
According to the technical scheme, the power supply detection module is used for detecting the PTC power supply voltage, and when the power supply voltage is too high, the PTC heater can be timely closed through the MCU central processing unit, so that the damage of the PTC heater is reduced.
To sum up, the utility model discloses following beneficial effect has:
the embodiment of the utility model provides a through a new energy automobile PTC heating control system, include: an MCU central processing unit; the CAN bus communication unit is connected with the automobile central control system and is used for transmitting control signals of the automobile central control system; the temperature detection unit is connected with the MCU central processing unit and used for detecting the real-time temperature of the PTC heater, and the temperature detection unit is connected with a first interface used for being connected with the PTC heater; the IGBT control unit is connected with the MCU central processing unit and is used for controlling the PTC heater to work; the PTC current detection unit is connected with the MCU central processing unit and the IGBT control unit and is used for detecting a voltage signal of the PTC heater; and a power supply unit for supplying an operating voltage. When the integrated control system is used, the power supply unit provides working voltage for the system, the PTC heater is connected with the first interface, the temperature detection unit detects the real-time working temperature of the PTC heater, the CAN bus communication unit transmits control signals of the central control system of the automobile, the MCU central processing unit controls the output power of the PTC heater through the IGBT control unit according to the control signals of the central control system of the automobile, and meanwhile, the PTC current detection unit detects the working current of the PTC heater in real time during working, so that the MCU central processing unit conveniently controls the output power of the PTC heater in real time, and when the working voltage or the working temperature of the PTC processor is abnormal, the MCU central processing unit CAN cut off the work of the PTC heater in time to prevent the damage of the PTC heater, thereby realizing the integrated control of the PTC heater.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a control block diagram of an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of the MCU cpu in the embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a CAN bus communication unit according to an embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of the temperature detecting unit in the embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of an IGBT driving circuit according to an embodiment of the present invention.
Fig. 6 is a schematic circuit diagram of an IGBT switching circuit according to an embodiment of the present invention.
Fig. 7 is the utility model provides an embodiment IGBT temperature detection module's schematic circuit diagram.
Fig. 8 is the circuit schematic diagram of the IGBT driving voltage detection module in the embodiment of the present invention.
Fig. 9 is a schematic circuit diagram of the PTC current detection unit according to the embodiment of the present invention.
Fig. 10 is a schematic circuit diagram of a power supply unit according to an embodiment of the present invention.
Fig. 11 is a schematic circuit diagram of the PTC power supply detection unit in the embodiment of the present invention.
The corresponding part names indicated by the numbers and letters in the drawings:
1. an MCU central processing unit; 2. a CAN bus communication unit; 21. a second interface; 22. a port electrostatic protection module; 23. a signal interference suppression module; 24. a communication processing chip; 3. a temperature detection unit; 31. a first interface; 4. an IGBT control unit; 41. an IGBT drive circuit; 42. an IGBT switching circuit; 43. an IGBT temperature detection module; 44. an IGBT driving voltage detection module; 5. a PTC current detection unit; 51. a signal amplification module; 52. a current processing module; 53. a voltage comparator; 6. a power supply unit; 61. a power supply control chip; 62. a power supply filtering module; 63. an IGBT driving power supply module; 64. a logic circuit power supply module; 65. a CAN communication power supply module; 7. a PTC power supply detection unit; 71. a high voltage filtering module; 72. and a power supply detection module.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Examples
A PTC heating control system for a new energy vehicle, as shown in fig. 1 to 11, comprising: MCU central processing unit 1; the CAN bus communication unit 2 is connected with the MCU central processing unit, and the CAN bus communication unit 2 is connected with the automobile central control system and used for transmitting control signals of the automobile central control system; the temperature detection unit 3 is connected with the MCU central processing unit 1 and is used for detecting the real-time temperature of the PTC heater, the temperature detection unit 3 comprises a temperature sensor, and the temperature detection unit 3 is connected with a first interface 31 used for being connected with the PTC heater; the IGBT control unit 4 is connected with the MCU central processing unit 1 and is used for controlling the PTC heater to work; a PTC current detection unit 5 connected with the MCU central processing unit 1 and the IGBT control unit 4 and used for detecting a voltage signal of the PTC heater; and a power supply unit 6 for supplying an operating voltage.
Specifically, as shown in fig. 3, the CAN bus communication unit 2 includes: a second interface 21 for connecting with a central control system of the vehicle; a port electrostatic protection module 22 connected to the second interface 21; a signal interference suppression module 23 connected to the port electrostatic protection module 22 and configured to suppress an interference signal, where the signal interference suppression module 23 employs a common mode inductor; and a communication processing chip 24 connected to the signal interference suppression module 23.
As shown in fig. 5 to 8, the IGBT control unit 4 includes: the IGBT driving circuit 41 is connected with the MCU central processing unit 1, and the IGBT driving circuit 41 is used for amplifying a control signal of the MCU central processing unit 1; and an IGBT switch circuit 42 connected to the IGBT drive circuit 41, the IGBT switch circuit 42 being connected to the first interface 31. In this embodiment, the first interface 31 is connected with two groups of PTC heaters, the corresponding IGBT driving circuit 41 and the IGBT switching circuit 42 are also respectively provided with two branches to respectively control the two groups of PTC heaters, the IGBT driving circuit 41 amplifies the control signal of the MCU cpu 1 to realize the driving operation of the IGBT switching circuit 42, and the IGBT switching circuit 42 controls the switching value, thereby realizing the control of the PTC heaters and the adjustment of the output power.
Further, the MCU central processing unit 1 is further connected to an IGBT temperature detection module 43 and an IGBT driving voltage detection module 44, the IGBT temperature detection module 43 is configured to detect the operating temperature of the IGBT control unit 4, and the IGBT driving voltage detection module 44 is configured to detect the driving voltage of the IGBT driving circuit 41; when the temperature of the IGBT control unit 4 is detected to be abnormal, the MCU central processing unit 1 can timely control the PTC heater to be closed, so that the IGBT control unit 4 is prevented from being damaged, and when the driving voltage is abnormal, the MCU central processing unit 1 can also control the PTC heater to be closed in time, so that the IGBT control unit 4 is prevented from being damaged.
As shown in fig. 9, the PTC current detection unit 5 includes: a signal amplification module 51 connected to the IGBT switching circuit 42; the current processing module 52 is connected with the signal amplification module 51, and the current processing module 52 is connected with the MCU 1 and is used for calculating and processing the working voltage of the PTC processor; the voltage comparator 53 is connected with the current processing module 52, and the voltage comparator 53 is connected with the MCU central processing unit 1 and is used for comparing the working voltage of the PTC processor with a preset voltage; the collected voltage signal of the PTC heater is amplified through the signal amplification module 51 to facilitate subsequent calculation processing, the voltage signal is calculated through the current processing module 52, so that the working current and the output power of the PTC heater can be accurately obtained, and the calculation result is sent to the MCU central processing unit 1, so that the MCU central processing unit 1 can accurately control the PTC heater, a certain time is required for calculation processing of the current processing module 52, the voltage signal of the PTC heater is compared with the preset voltage through the voltage comparator 53, and when the voltage signal is greater than the preset voltage, the MCU central processing unit 1 can timely control the PTC heater to be closed, and the timeliness of fault processing is improved.
As shown in fig. 10, the power supply unit 6 includes: the power supply control chip 61, the power supply filter module 62 connected with the voltage control chip, and the IGBT drive power supply module 63 connected with the power supply filter module 62, wherein the IGBT drive power supply module 63 is connected with the IGBT drive circuit 41, the power supply module further comprises a logic circuit power supply module 64 and a CAN communication power supply module 65, the logic circuit power supply module 64 is connected with the power supply control chip 61, and the CAN communication power supply module 65 is connected with the communication processing chip 24; each functional module is isolated and powered through the IGBT driving power supply module 63, the logic circuit power supply module 64 and the CAN communication power supply module 65, and the power supply stability is improved.
Further, as shown in fig. 11, the first interface 31 is further connected to a PTC power supply detection unit 7 for detecting a power supply voltage of the PTC heater, an output end of the PTC power supply detection unit 7 is connected to the MCU central processing unit 1, and the PTC power supply detection unit 7 includes: the high-voltage filtering module 71 is connected with the first interface 31, and the high-voltage filtering module 71 adopts a common-mode inductor; and a power supply detection module 72 connected with the high voltage filtering module 71, wherein the power supply detection module 72 is connected with the MCU 1. The power supply detection module 72 detects the PTC power supply voltage, and when the power supply voltage is too high, the PTC heater can be timely turned off through the MCU central processing unit 1, so that the damage of the PTC heater is reduced.
When the device is used, the power supply unit 6 provides working voltage for the system, the PTC heater is connected with the first interface 31, the temperature detection unit 3 detects the real-time working temperature of the PTC heater, the control signal of the automobile central control system is transmitted through the CAN bus communication unit 2, the MCU central processing unit controls the output power of the PTC heater through the IGBT control unit 4 according to the control signal of the automobile central control system, and meanwhile, the PTC current detection unit 5 detects the working current of the PTC heater in real time during working, so that the MCU central processing unit CAN conveniently control the output power of the PTC heater in real time, and when the working voltage or the working temperature of the PTC processor is abnormal, the MCU central processing unit CAN cut off the work of the PTC heater in time to prevent the damage of the PTC heater, thereby realizing the centralized control of the PTC heater.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a new energy automobile PTC heating control system which characterized in that includes:
an MCU central processing unit;
the CAN bus communication unit is connected with the automobile central control system and is used for transmitting control signals of the automobile central control system;
the temperature detection unit is connected with the MCU central processing unit and used for detecting the real-time temperature of the PTC heater, and the temperature detection unit is connected with a first interface used for being connected with the PTC heater;
the IGBT control unit is connected with the MCU central processing unit and is used for controlling the PTC heater to work;
the PTC current detection unit is connected with the MCU central processing unit and the IGBT control unit and is used for detecting a voltage signal of the PTC heater; and the number of the first and second groups,
a power supply unit for providing an operating voltage.
2. The PTC heating control system for a new energy vehicle according to claim 1, wherein the CAN bus communication unit comprises:
the second interface is used for being connected with an automobile central control system;
the port electrostatic protection module is connected with the second interface;
the signal interference suppression module is connected with the port electrostatic protection module and used for suppressing interference signals; and the number of the first and second groups,
and the communication processing chip is connected with the signal interference suppression module.
3. The new energy vehicle PTC heating control system according to claim 1 or 2, wherein the IGBT control unit comprises:
the IGBT driving circuit is connected with the MCU central processing unit and is used for amplifying a control signal of the MCU central processing unit;
and the IGBT switch circuit is connected with the IGBT driving circuit and is connected with the first interface.
4. The PTC heating control system for the new energy automobile according to claim 3, wherein the MCU central processing unit is further connected with an IGBT temperature detection module, and the IGBT temperature detection module is used for detecting the working temperature of the IGBT control unit.
5. The PTC heating control system for the new energy automobile according to claim 4, wherein the MCU central processing unit is further connected with an IGBT driving voltage detection module, and the IGBT driving voltage detection module is used for detecting the driving voltage of the IGBT driving circuit.
6. The new energy vehicle PTC heating control system according to claim 3, wherein the PTC current detection unit comprises:
the signal amplification module is connected with the IGBT switching circuit;
the current processing module is connected with the MCU and is used for calculating and processing the working voltage of the PTC processor;
and the voltage comparator is connected with the MCU central processing unit and is used for comparing the working voltage of the PTC processor with a preset voltage.
7. The new energy vehicle PTC heating control system according to claim 2, wherein the power supply unit comprises: the IGBT driving power supply module is connected with the IGBT driving circuit.
8. The PTC heating control system for the new energy automobile according to claim 7, wherein the power module further comprises a logic circuit power module and a CAN communication power module, the logic circuit power module is connected with the power control chip, and the CAN communication power module is connected with the communication processing chip.
9. The PTC heating control system for the new energy automobile according to claim 1, wherein a PTC power supply detection unit for detecting a power supply voltage of a PTC heater is connected to the first interface, and an output end of the PTC power supply detection unit is connected to the MCU central processing unit.
10. The PTC heating control system for a new energy vehicle according to claim 9, wherein the PTC power supply detection unit comprises:
the high-voltage filtering module is connected with the first interface; and the number of the first and second groups,
and the power supply detection module is modularly connected with the high-voltage filter and is connected with the MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021865668.XU CN212373100U (en) | 2020-08-31 | 2020-08-31 | New energy automobile PTC heating control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021865668.XU CN212373100U (en) | 2020-08-31 | 2020-08-31 | New energy automobile PTC heating control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212373100U true CN212373100U (en) | 2021-01-19 |
Family
ID=74176032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021865668.XU Expired - Fee Related CN212373100U (en) | 2020-08-31 | 2020-08-31 | New energy automobile PTC heating control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212373100U (en) |
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2020
- 2020-08-31 CN CN202021865668.XU patent/CN212373100U/en not_active Expired - Fee Related
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Granted publication date: 20210119 |