CN217824737U - Vehicle low-voltage power control system and vehicle - Google Patents
Vehicle low-voltage power control system and vehicle Download PDFInfo
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- CN217824737U CN217824737U CN202221828890.1U CN202221828890U CN217824737U CN 217824737 U CN217824737 U CN 217824737U CN 202221828890 U CN202221828890 U CN 202221828890U CN 217824737 U CN217824737 U CN 217824737U
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- 239000003990 capacitor Substances 0.000 claims description 9
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
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- 239000004065 semiconductor Substances 0.000 claims 1
- 230000017105 transposition Effects 0.000 abstract description 2
- 101100236764 Caenorhabditis elegans mcu-1 gene Proteins 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000003745 diagnosis Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model discloses a vehicle low pressure power control system and vehicle, wherein the vehicle low pressure power control system includes MCU, power supply circuit, CAN transceiver circuit, storage battery reverse connection protection circuit and at least one way low pressure power control circuit; the input end of the power circuit is connected with an external storage battery, the output end of the power circuit outputs a system power supply, and the output end of the power circuit is connected with the input end of the MCU; the CAN transceiver circuit is respectively connected with an external vehicle control unit and an MCU; the input end of the storage battery reverse connection protection circuit is connected with the output end of the MCU; the low-voltage power control circuit comprises a high-side driving chip, the output end of the MCU is connected with the signal control end of the high-side driving chip, the signal feedback end of the high-side driving chip is connected with the input end of the MCU, the voltage input end of the high-side driving chip is connected with an external storage battery, and the voltage output end of the high-side driving chip is connected with an external low-voltage load. The utility model discloses the realization realizes intelligent control and storage battery transposition protection to vehicle low voltage power supply, has low-power consumption operation design simultaneously.
Description
Technical Field
The utility model relates to a vehicle circuit design technical field, concretely relates to vehicle low pressure power control system and vehicle.
Background
With the gradual improvement of the living standard of people, vehicles have become main tools of riding instead of walk, and the power utilization management on the vehicles gets more and more attention of users.
The management of low-voltage power electrical appliances on the current vehicle has the following defects: 1. the traditional vehicle low-voltage power supply management adopts a relay and fuse scheme to realize on/off control and overcurrent protection, but the design requirements of intelligent control are not met for diagnosis and feedback of fault types such as short circuit, overcurrent, open circuit, over-temperature fault and the like; 2. the traditional vehicle low-voltage power supply management module cannot realize a low-power consumption mode, and the power consumption of the whole vehicle is large in a vehicle parking state, so that the power of the vehicle is insufficient; or, the low power consumption design needs to use multiple DCDC power supplies, so that the material cost is high, the number of fault points is increased, and the cost reduction of the whole vehicle is not facilitated; 3. the traditional control module cannot achieve reverse connection protection of the storage battery, and when the anode and the cathode of the vehicle-mounted storage battery are in reverse connection, electronic components in the control module are burnt to cause faults.
SUMMERY OF THE UTILITY MODEL
For solving above-mentioned at least one technical problem, the utility model provides a technical scheme does:
a vehicle low-voltage power control system comprises an MCU, a power circuit, a CAN transceiver circuit, a storage battery reverse connection protection circuit and at least one path of low-voltage power control circuit;
the input end of the power supply circuit is connected with an external battery, the output end of the power supply circuit outputs a system power supply, and the output end of the power supply circuit is connected with the input end of the MCU;
the CAN transceiver circuit is respectively connected with an external vehicle control unit and the MCU;
the input end of the storage battery reverse connection protection circuit is connected with the output end of the MCU;
the low-voltage power control circuit comprises a high-side driving chip, the output end of the MCU is connected with the signal control end of the high-side driving chip, the signal feedback end of the high-side driving chip is connected with the input end of the MCU, the voltage input end of the high-side driving chip is connected with an external storage battery, and the voltage output end of the high-side driving chip is connected with an external low-voltage load.
The utility model discloses further set up to power supply circuit is including awakening up drive circuit and DC-DC power chip, awaken up drive circuit's input and connect the output and the outside source of awakening up of CAN transceiver circuitry, awaken up drive circuit's output and connect the enable end of DC-DC power chip, outside storage battery is connected to DC-DC power supply circuit's voltage input end, DC-DC power supply circuit's output system power.
The utility model discloses further set up to low pressure power control circuit still includes temperature sensor, temperature sensor sets up on the circuit at high limit driver chip place, temperature sensor's output is connected MCU's input.
The utility model discloses further set up as high limit driver chip's voltage output end is connected with a zener diode and an electric capacity at least, zener diode's negative pole is connected high limit driver chip's voltage output end, zener diode's anodal connection protection ground PGND, the one end of electric capacity is connected high limit driver chip's voltage output end, the negative pole of outside storage battery is connected to the other end of electric capacity.
The utility model discloses further set up as storage battery transposition protection circuit includes first resistance, second resistance and MOS pipe, the one end of first resistance is connected MCU's output, the other end of first resistance is connected the one end of second resistance with the grid of MOS pipe, the negative pole of outside storage battery is connected to the other end of second resistance, the negative pole and the protection ground PGND of outside storage battery are connected respectively to the drain electrode and the source electrode of MOS pipe.
The utility model discloses further set up to high limit driver chip's feeder ear by system power supply.
The utility model discloses further set up to high limit driver chip's supply end is supplied power by outside storage battery.
The utility model discloses further set up to the outside source of awakening up includes that the vehicle starts to awaken up in the source, the brake awakens up the source and charges and awaken up at least one in the source.
The utility model discloses further set up as the system power supply is 3.3V or 5V DC voltage.
A vehicle comprises the vehicle low-voltage power control system.
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
according to the technical scheme, the vehicle low-voltage power control system realizes on/off control of the MCU on each low-voltage power control circuit power supply through the high-side driving chip, the high-side driving chip feeds back working signals in the working process, the MCU diagnoses the feedback working signals and reports fault types to the vehicle control unit through the CAN receiving and sending circuit, and meanwhile, a temperature sensor is arranged to detect the heating condition of the low-voltage power control circuit.
According to the technical scheme, the storage battery reverse connection protection circuit is arranged, when an external vehicle-mounted storage battery is reversely connected, the DC-DC power supply chip does not work and cannot provide a system power supply for the MCU, the MCU cannot provide a working signal for the storage battery reverse connection protection circuit, so that the negative electrode of the external storage battery and a protection ground PGND are disconnected, the low-voltage power control circuit cannot form a loop, and therefore the high-side driving chip is protected. The storage battery reverse connection protection circuit only adopts one MOS tube to disconnect the power control module power ground and the frame ground, so that the storage battery reverse connection protection is realized, and under the working condition of the storage battery reverse connection fault, a current loop cannot be formed, so that the purpose of protecting electronic components is achieved, and the cost is low.
According to the technical scheme, the vehicle low-voltage power control system is only provided with one DC-DC power supply chip, so that the material cost of the system is reduced; and the awakening drive circuit is arranged for awakening the DC-DC power supply chip, and the power supply of the vehicle is disconnected after the low-voltage power control system stops using, so that the phenomenon of power shortage of the storage battery caused by long-time vehicle stop is avoided.
Drawings
Fig. 1 is a schematic block diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a power circuit according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a CAN transceiver circuit according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a reverse connection protection circuit of a storage battery in an embodiment of the present invention.
Fig. 5 is a basic circuit diagram of a low voltage power control circuit according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a low-voltage power control circuit according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of another low voltage power control circuit according to an embodiment of the present invention.
Fig. 8 is a basic circuit diagram of the low-voltage power control circuit when the storage battery is reversely connected according to the embodiment of the present invention.
Detailed Description
For a further understanding of the present invention, reference will be made to the drawings and examples for a detailed description of the invention.
It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an integral connection, or a detachable connection; either mechanically or electrically, or internally communicating two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art will understand the specific meanings of the above terms according to specific situations.
Example 1
With reference to fig. 1 to 5, the technical scheme of the present invention is a vehicle low voltage power control system, which comprises an MCU1, a power circuit 2, a CAN transceiver circuit 3, a battery reverse connection protection circuit 4, and at least one low voltage power control circuit 5;
the input end of the power circuit 2 is connected with an external storage battery, the output end of the power circuit 2 outputs a system power supply, and the output end of the power circuit 2 is connected with the input end of the MCU1;
the CAN transceiver circuit 3 is respectively connected with an external vehicle control unit and the MCU1;
the input end of the storage battery reverse connection protection circuit 4 is connected with the output end of the MCU1;
the low-voltage power control circuit 5 comprises a high-side driving chip, the output end of the MCU1 is connected with the signal control end of the high-side driving chip 51, the signal feedback end of the high-side driving chip 51 is connected with the input end of the MCU1, the voltage input end of the high-side driving chip 51 is connected with an external storage battery, and the voltage output end of the high-side driving chip 51 is connected with an external low-voltage load.
In this embodiment, as shown in fig. 2, the power circuit 2 includes a wake-up driving circuit and a DC-DC power chip, an input end of the wake-up driving circuit is connected to an output end of the CAN transceiver circuit and an external wake-up source, an output end of the wake-up driving circuit is connected to an enable end of the DC-DC power chip, a voltage input end of the DC-DC power circuit is connected to an external battery, and an output end of the DC-DC power circuit outputs a system power.
In this embodiment, as shown in fig. 3, the CAN transceiver circuit 3 includes a CAN transceiver chip, the CAN transceiver chip is powered by an external battery, and the CAN transceiver chip is respectively connected to an external vehicle controller and the MCU1, so as to implement communication between the external vehicle controller and the MCU 1.
In this embodiment, as shown in fig. 5, the low voltage power control circuit 5 further includes a temperature sensor 52, the temperature sensor 52 is disposed on a circuit where the high side driver chip 51 is located, and an output end of the temperature sensor 52 is connected to an input end of the MCU 1.
In this embodiment, the voltage output end of the high-side driver chip 51 is connected to at least one zener diode and a capacitor, the negative electrode of the zener diode is connected to the voltage output end of the high-side driver chip, the positive electrode of the zener diode is connected to the protection ground PGND, one end of the capacitor is connected to the voltage output end of the high-side driver chip, and the other end of the capacitor is connected to the negative electrode of the external battery.
In the above embodiment, as shown in fig. 5, a zener diode D12 and a capacitor C9 are connected to the voltage output terminal of the high-side driver chip 51, a cathode of the zener diode D12 is connected to the voltage output terminal of the high-side driver chip 51, an anode of the zener diode D12 is connected to a protection ground PGND, one end of the capacitor C9 is connected to the voltage output terminal of the high-side driver chip 51, and the other end of the capacitor C9 is connected to a cathode of an external battery.
In this embodiment, storage battery joins conversely protection circuit 4 includes first resistance, second resistance and MOS pipe, the one end of first resistance is connected MCU's output, the other end of first resistance is connected the one end of second resistance with the grid of MOS pipe, the negative pole of outside storage battery is connected to the other end of second resistance, the drain electrode and the source electrode of MOS pipe are connected the negative pole of outside storage battery and are protected ground PGND respectively.
In the above embodiment, as shown in fig. 4, the storage battery reverse connection protection circuit 4 includes a resistor R16, a resistor R17, and a MOS transistor Q3, one end of the resistor R16 is connected to the output end of the MCU, the other end of the resistor R16 is connected to one end of the resistor R17 and the gate of the MOS transistor Q3, the other end of the resistor R17 is connected to the negative electrode of the external storage battery, and the drain and the source of the MOS transistor Q3 are respectively connected to the negative electrode of the external storage battery and the protection ground PGND.
In the above embodiment, as shown in fig. 8, when the external vehicle-mounted battery is reversely connected, the positive and negative electrodes of the high-side driver chip are reversed, since the high-side driver chip has the reverse parasitic diode Dn, the current flows from the positive electrode of the battery through the freewheeling diode D12, flows through the parasitic reverse diode Dn, and flows back to the negative electrode of the battery, and since the loop impedance is small, the large current will burn the freewheeling diode D12 and the high-side driver chip; however, when the vehicle-mounted storage battery is reversely connected, the DC-DC power supply chip does not work and cannot provide a system power supply for the MCU, the MCU cannot provide a working signal for the storage battery reverse connection protection circuit, the MOS tube Q3 cannot be conducted, the negative electrode of the external storage battery and the PGND are disconnected, and the low-voltage power control circuit cannot form a loop, so that the high-side driving chip is protected.
In this embodiment, the power supply terminal of the high-side driver chip 51 may be powered by the system power supply.
IN the above embodiment, as shown IN fig. 6, the model of the high-side driver chip U4 is VN5T006, an IN pin of the high-side driver chip U4 is connected to an output terminal of the MCU, a CS pin of the high-side driver chip U4 is connected to an input terminal of the MCU, an FR _ Stby pin of the high-side driver chip U4 is connected to the system power supply, a VCC pin of the high-side driver chip U4 is connected to an anode of the battery, and an OUT pin of the high-side driver chip U4 outputs a voltage for driving a load; the NTC temperature sensor R36 is used for detecting the heating condition of the circuit where the high-side driving chip U4 is located and connecting a temperature sampling signal to the input end of the MCU.
In this embodiment, the power supply terminal of the high side driver chip 51 can be powered by an external battery.
IN the above embodiment, as shown IN fig. 7, the type of the high-side driver chip U5 IS BTS50085, an IN pin of the high-side driver chip U5 IS connected to the output terminal of the MCU, an IS pin of the high-side driver chip U5 IS connected to the input terminal of the MCU, a VBB pin of the high-side driver chip U5 IS connected to the positive electrode of the battery, and OUT1-OUT4 pins of the high-side driver chip U5 output the voltage of the driving load; the NTC temperature sensor R42 is used for detecting the heating condition of the circuit where the high-side driving chip U5 is located and connecting a temperature sampling signal to the input end of the MCU.
In this embodiment, the external wake-up source includes at least one of a vehicle start wake-up source, a brake wake-up source, and a charge wake-up source.
In this embodiment, the system power supply is 3.3V or 5V dc voltage.
The utility model discloses vehicle low pressure power control system realizes MCU through high limit driver chip to the on/off control of each way low pressure power control circuit power, and high limit driver chip feeds back working signal in the course of the work, diagnoses feedback working signal through MCU and reports the fault type to vehicle control unit through CAN transceiver circuit, still is provided with the heating condition that temperature sensor detected low pressure power control circuit simultaneously; the low-voltage power control system of the vehicle is only provided with one DC-DC power supply chip, so that the material cost of the system is reduced; and the awakening driving circuit is arranged for awakening the DC-DC power supply chip, and a vehicle power supply is disconnected after the low-voltage power control system is stopped, so that the phenomenon of storage battery power shortage caused by long-time vehicle stop is avoided.
Example 2
A vehicle comprising the vehicle low-voltage power control system of embodiment 1.
The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.
Claims (10)
1. A low-voltage power control system of a vehicle is characterized by comprising an MCU, a power circuit, a CAN transceiver circuit, a storage battery reverse connection protection circuit and at least one path of low-voltage power control circuit;
the input end of the power circuit is connected with an external storage battery, the output end of the power circuit outputs a system power supply, and the output end of the power circuit is connected with the input end of the MCU;
the CAN transceiver circuit is respectively connected with an external vehicle control unit and the MCU;
the input end of the storage battery reverse connection protection circuit is connected with the output end of the MCU;
the low-voltage power control circuit comprises a high-side driving chip, the output end of the MCU is connected with the signal control end of the high-side driving chip, the signal feedback end of the high-side driving chip is connected with the input end of the MCU, the voltage input end of the high-side driving chip is connected with an external storage battery, and the voltage output end of the high-side driving chip is connected with an external low-voltage load.
2. The vehicle low-voltage power control system according to claim 1, wherein the power circuit comprises a wake-up driving circuit and a DC-DC power chip, an input end of the wake-up driving circuit is connected to an output end of the CAN transceiver circuit and an external wake-up source, an output end of the wake-up driving circuit is connected to an enable end of the DC-DC power chip, a voltage input end of the DC-DC power circuit is connected to an external battery, and an output end of the DC-DC power circuit outputs a system power.
3. The vehicle low-voltage power control system according to claim 1, wherein the low-voltage power control circuit further comprises a temperature sensor, the temperature sensor is arranged on a circuit where the high-side driving chip is located, and an output end of the temperature sensor is connected with an input end of the MCU.
4. The vehicle low-voltage power control system according to any one of claims 1 to 3, wherein at least one zener diode and a capacitor are connected to the voltage output terminal of the high-side driver chip, the cathode of the zener diode is connected to the voltage output terminal of the high-side driver chip, the anode of the zener diode is connected to a protection ground PGND, one end of the capacitor is connected to the voltage output terminal of the high-side driver chip, and the other end of the capacitor is connected to the cathode of an external battery.
5. The vehicle low-voltage power control system according to claim 4, wherein the battery reverse connection protection circuit comprises a first resistor, a second resistor and an MOS (metal oxide semiconductor) transistor, one end of the first resistor is connected with the output end of the MCU, the other end of the first resistor is connected with one end of the second resistor and the grid electrode of the MOS transistor, the other end of the second resistor is connected with the negative electrode of an external battery, and the drain electrode and the source electrode of the MOS transistor are respectively connected with the negative electrode of the external battery and a protection ground PGND.
6. The vehicle low-voltage power control system according to any one of claims 1 to 3, wherein the power supply terminal of the high-side driver chip is powered by the system power supply.
7. The vehicle low-voltage power control system according to any one of claims 1 to 3, wherein the power supply terminal of the high-side driving chip is powered by an external battery.
8. The vehicle low voltage power control system according to claim 2, wherein the external wake-up source comprises at least one of a vehicle start wake-up source, a brake wake-up source, and a charge wake-up source.
9. A vehicle low voltage power control system according to any one of claims 1 to 3 wherein the system power supply is 3.3V or 5V dc.
10. A vehicle characterized by comprising a vehicle low-voltage power control system of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221828890.1U CN217824737U (en) | 2022-07-15 | 2022-07-15 | Vehicle low-voltage power control system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221828890.1U CN217824737U (en) | 2022-07-15 | 2022-07-15 | Vehicle low-voltage power control system and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN217824737U true CN217824737U (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221828890.1U Active CN217824737U (en) | 2022-07-15 | 2022-07-15 | Vehicle low-voltage power control system and vehicle |
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| CN (1) | CN217824737U (en) |
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- 2022-07-15 CN CN202221828890.1U patent/CN217824737U/en active Active
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