CN218161910U - Vehicle low-voltage power grid, power supply system and vehicle - Google Patents
Vehicle low-voltage power grid, power supply system and vehicle Download PDFInfo
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- CN218161910U CN218161910U CN202221816289.0U CN202221816289U CN218161910U CN 218161910 U CN218161910 U CN 218161910U CN 202221816289 U CN202221816289 U CN 202221816289U CN 218161910 U CN218161910 U CN 218161910U
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Abstract
The utility model discloses a vehicle low voltage electric wire netting, electrical power generating system and vehicle, the positive pole of power battery in the vehicle low voltage electric wire netting is connected with the input of DCDC converter, and the output of DCDC converter is connected with consumer; the output end of the DCDC converter is also connected with the input end of a low-voltage storage battery, and the output end of the low-voltage storage battery is connected with electric equipment; the first electronic control unit is connected with the output end of the DCDC converter, the second electronic control unit is connected with the output end of the low-voltage storage battery, the first electronic control unit is in communication connection with the second electronic control unit, the second electronic control unit outputs a power grid fault signal to the first electronic control unit, and the first electronic control unit executes corresponding safety action. The utility model discloses need not additionally to set up electric wire netting protection control ware, the cost is lower, and the circuit is simple, can make the vehicle get into safe state fast.
Description
Technical Field
The utility model relates to a vehicle-mounted power system technical field especially relates to a vehicle low pressure electric wire netting, electrical power generating system and vehicle.
Background
In the existing power system architecture, when a low-voltage power grid supply system fails due to short circuit, open circuit and the like, the power supply of a vehicle is cut off, so that a driving control component cannot operate, the risk of vehicle out of control exists, and the personal safety of drivers and passengers is damaged. In order to solve the above problems, the prior art adopts a redundant circuit design. When any trunk power supply of the vehicle breaks down, the power supply isolation component disconnects the fault loop to ensure that one normal power supply is provided in the system loop.
At present, common power grid redundancy is realized by a power grid protection controller, and front and back isolation of a power grid is realized by the power grid protection controller. Once one power supply fails, the power grid protection controller disconnects the failed power supply to realize the isolation of the failed power supply, so that the other power supply is kept to work normally. However, this method requires an additional grid protection controller in the low-voltage grid, which is costly and complicated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a vehicle low pressure electric wire netting, electrical power generating system and vehicle are provided, need not additionally to set up electric wire netting protection control ware, and the cost is lower, and the circuit is simple, can make the vehicle get into safe state fast.
In order to achieve the above object, an embodiment of the present invention provides a vehicle low-voltage power grid, which includes a power battery, a DCDC converter, a low-voltage battery, a first electronic control unit, and a second electronic control unit;
the anode of the power battery is connected with the input end of the DCDC converter, and the output end of the DCDC converter is connected with electric equipment;
the output end of the DCDC converter is also connected with the input end of the low-voltage storage battery, and the output end of the low-voltage storage battery is connected with electric equipment;
the first electronic control unit is connected with the output end of the DCDC converter, the second electronic control unit is connected with the output end of the low-voltage storage battery, the first electronic control unit is in communication connection with the second electronic control unit, the second electronic control unit outputs a power grid fault signal to the first electronic control unit, and the first electronic control unit executes corresponding safety action.
As an optional embodiment, the first electronic control unit executes a corresponding safety action, specifically:
the first electronic control unit outputs a safety action execution signal to the actuator, and the actuator executes a corresponding safety action.
As an alternative embodiment, the actuator comprises a brake controller, and the safety action is to perform braking.
As an optional embodiment, the actuator further includes a parking controller, and the safety action is to perform parking.
As an alternative embodiment, the first electronic control unit and the second electronic control unit are connected through bus communication.
As an alternative embodiment, the low-voltage battery is a 12V battery.
The embodiment of the utility model provides a still provide a power supply system, power supply system includes above-mentioned arbitrary vehicle low voltage electric wire netting.
The embodiment of the utility model provides a vehicle is still provided, the vehicle includes above-mentioned electrical power generating system.
Compared with the prior art, the embodiment of the utility model provides a pair of vehicle low pressure electric wire netting, electrical power generating system and vehicle's beneficial effect lies in: the vehicle low-voltage power grid comprises a power battery, a DCDC converter, a low-voltage storage battery, a first electronic control unit and a second electronic control unit; the anode of the power battery is connected with the input end of the DCDC converter, and the output end of the DCDC converter is connected with electric equipment; the output end of the DCDC converter is also connected with the input end of the low-voltage storage battery, and the output end of the low-voltage storage battery is connected with electric equipment; the first electronic control unit is connected with the output end of the DCDC converter, the second electronic control unit is connected with the output end of the low-voltage storage battery, the first electronic control unit is in communication connection with the second electronic control unit, the second electronic control unit outputs a power grid fault signal to the first electronic control unit, and the first electronic control unit executes corresponding safety action. The embodiment of the utility model provides a need not additionally to set up electric wire netting protection control ware, the cost is lower, and the circuit is simple, can make the vehicle get into safe state fast.
Drawings
Fig. 1 is a schematic circuit diagram of a preferred embodiment of a vehicle low-voltage power grid according to the present invention.
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.
In the description of the present application, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first," "second," "third," etc. may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description of the present application, it is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the present invention, and the specific meanings of the terms in the present application will be understood to those skilled in the art in a specific context.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of a preferred embodiment of a low voltage power grid for a vehicle according to the present invention. The vehicle low-voltage power grid comprises a power battery, a DCDC converter, a low-voltage storage battery, a first electronic control unit and a second electronic control unit;
the anode of the power battery is connected with the input end of the DCDC converter, and the output end of the DCDC converter is connected with electric equipment;
the output end of the DCDC converter is also connected with the input end of the low-voltage storage battery, and the output end of the low-voltage storage battery is connected with electric equipment;
the first electronic control unit is connected with the output end of the DCDC converter, the second electronic control unit is connected with the output end of the low-voltage storage battery, the first electronic control unit is in communication connection with the second electronic control unit, the second electronic control unit outputs a power grid fault signal to the first electronic control unit, and the first electronic control unit executes corresponding safety action.
Specifically, the present embodiment provides a vehicle low-voltage power grid including a power battery, a DCDC converter, a low-voltage battery, a first electronic control unit, and a second electronic control unit. Among them, the electronic control units, i.e., ECUs, the first electronic control unit is typically a redundant ECU, and the second electronic control unit is typically an actuator ECU. The anode of the power battery is connected with the input end of the DCDC converter, and the output end of the DCDC converter is connected with the electric equipment. The DCDC converter is used for converting high-voltage direct current of the power battery into low-voltage direct current to supply power to electric equipment. The output end of the DCDC converter is also connected with the input end of the low-voltage storage battery and used for converting high-voltage direct current of the power battery into low-voltage direct current to charge the low-voltage storage battery. The output end of the low-voltage storage battery is connected with the electric equipment and used for supplying power to the electric equipment. The first electronic control unit is connected with the output end of the DCDC converter, the second electronic control unit is connected with the output end of the low-voltage storage battery, and the first electronic control unit is in communication connection with the second electronic control unit. The second electronic control unit outputs a power grid fault signal to the first electronic control unit, and the first electronic control unit executes corresponding safety action to enable the vehicle to enter a safety state.
In practical application, the grid voltage is monitored by the second electronic control unit, namely, the actuator ECU, and when the actuator ECU monitors that the grid voltage is abnormal, for example: and outputting a power grid fault signal by overvoltage, undervoltage, short circuit, open circuit and the like, and sending the power grid fault signal to a first electronic control unit, namely the redundancy ECU. And after receiving the grid fault signal, the redundant ECU executes corresponding safety action, so that the vehicle enters a safety state.
The embodiment does not need to additionally arrange a power grid protection controller, and has the advantages of low cost and simple circuit. When the voltage of the low-voltage power grid is abnormal, the safety action executing mechanism is directly controlled to execute corresponding safety action, so that the vehicle can quickly enter a safety state.
As an optional embodiment, the first electronic control unit executes a corresponding safety action, specifically:
the first electronic control unit outputs a safety action execution signal to an actuator, and the actuator executes a corresponding safety action.
Specifically, in this embodiment, after receiving the grid fault signal, the first electronic control unit outputs a safety action execution signal, and sends the safety action execution signal to an actuator in the first electronic control unit, and the actuator executes a corresponding safety action, so that the vehicle enters a safety state.
As an alternative, the actuator comprises a brake controller, and the safety action is to perform braking.
Specifically, the actuator in this embodiment may be a brake controller, and when the first electronic control unit receives the grid fault signal, outputs a safety action execution signal, and sends the safety action execution signal to the brake controller. And after receiving the safety action execution signal, the brake controller stops torque output and executes braking so as to enable the vehicle to enter a safety state.
As an optional embodiment, the actuator further includes a parking controller, and the safety action is to perform parking.
Specifically, the actuator in this embodiment may be a parking controller, and when the first electronic control unit receives the power grid fault signal, outputs a safety action execution signal, and sends the safety action execution signal to the parking controller. And after receiving the safety action execution signal, the parking controller executes parking to enable the vehicle to enter a safe state.
It should be noted that the actuator in this embodiment is not limited to the brake controller and the parking controller, and other actuators capable of performing safety actions to enable the vehicle to enter a safe state are all within the protection scope of the present invention.
As an alternative embodiment, the first electronic control unit and the second electronic control unit are connected in communication through a bus.
Specifically, in this embodiment, the first electronic control unit and the second electronic control unit are connected through bus communication. The embodiment is preferably connected through a CAN network, because the CAN network has a high transmission speed, when the second electronic control unit monitors that the voltage of the power grid is abnormal, the CAN network quickly sends a power grid fault signal to the first electronic control unit, so that the first electronic control unit CAN quickly control the actuator to execute a safety action.
As an alternative embodiment, the low-voltage battery is a 12V battery.
Specifically, the low-voltage battery in the present embodiment is preferably a 12V battery, and the negative electrode of the low-voltage battery is grounded. The positive pole of the low-voltage storage battery is output to each electrical appliance, each electrical appliance is directly grounded on the vehicle body, the negative pole of the low-voltage storage battery is grounded on the vehicle body to form a loop, and the negative poles of each electrical appliance and the negative pole of the low-voltage storage battery are grounded.
The embodiment of the utility model provides a still provide a power supply system, power supply system includes above-mentioned arbitrary embodiment vehicle low voltage electric wire netting.
The embodiment of the utility model provides a vehicle is still provided, the vehicle includes above-mentioned electrical power generating system.
The embodiment of the utility model provides a vehicle low voltage electric wire netting, electrical power generating system and vehicle, vehicle low voltage electric wire netting includes power battery, DCDC converter, low voltage battery, first electronic control unit and second electronic control unit; the anode of the power battery is connected with the input end of the DCDC converter, and the output end of the DCDC converter is connected with electric equipment; the output end of the DCDC converter is also connected with the input end of the low-voltage storage battery, and the output end of the low-voltage storage battery is connected with electric equipment; the first electronic control unit is connected with the output end of the DCDC converter, the second electronic control unit is connected with the output end of the low-voltage storage battery, the first electronic control unit is in communication connection with the second electronic control unit, the second electronic control unit outputs a power grid fault signal to the first electronic control unit, and the first electronic control unit executes corresponding safety action. The embodiment of the utility model provides a need not additionally to set up electric wire netting protection controller, the cost is lower, and the circuit is simple, can make the vehicle get into safe state fast.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (8)
1. A vehicle low-voltage power grid is characterized by comprising a power battery, a DCDC converter, a low-voltage storage battery, a first electronic control unit and a second electronic control unit;
the anode of the power battery is connected with the input end of the DCDC converter, and the output end of the DCDC converter is connected with electric equipment;
the output end of the DCDC converter is also connected with the input end of the low-voltage storage battery, and the output end of the low-voltage storage battery is connected with electric equipment;
the first electronic control unit is connected with the output end of the DCDC converter, the second electronic control unit is connected with the output end of the low-voltage storage battery, the first electronic control unit is in communication connection with the second electronic control unit, the second electronic control unit outputs a power grid fault signal to the first electronic control unit, and the first electronic control unit executes corresponding safety action.
2. A vehicle low-voltage power network according to claim 1, characterized in that said first electronic control unit performs corresponding safety actions, in particular:
the first electronic control unit outputs a safety action execution signal to the actuator, and the actuator executes a corresponding safety action.
3. A vehicle low voltage grid according to claim 2, wherein the actuator comprises a brake controller and the safety action is the execution of a brake.
4. A vehicle low voltage power network according to claim 3, characterized in that the actuator further comprises a parking controller, the safety action then being the execution of parking.
5. The vehicle low-voltage power grid according to claim 1, characterized in that the first electronic control unit and the second electronic control unit are communicatively connected by a bus.
6. A vehicle low voltage power network according to claim 1, characterized in that said low voltage battery is a 12V battery.
7. An electric power supply system, characterized in that it comprises a vehicle low-voltage electric network according to any one of claims 1 to 6.
8. A vehicle characterized by comprising the power supply system according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221816289.0U CN218161910U (en) | 2022-07-14 | 2022-07-14 | Vehicle low-voltage power grid, power supply system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221816289.0U CN218161910U (en) | 2022-07-14 | 2022-07-14 | Vehicle low-voltage power grid, power supply system and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN218161910U true CN218161910U (en) | 2022-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221816289.0U Active CN218161910U (en) | 2022-07-14 | 2022-07-14 | Vehicle low-voltage power grid, power supply system and vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN218161910U (en) |
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- 2022-07-14 CN CN202221816289.0U patent/CN218161910U/en active Active
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Effective date of registration: 20240222 Granted publication date: 20221227 |
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