Prompting system for abnormal power supply of low-voltage loop of whole vehicle
By using communication detection and fault diagnosis between the vehicle controller and the DC/DC converter, combined with the instrument module to illuminate the fault indicator light, the problem of the inability to fully cover the low-voltage circuit abnormality indication in the existing technology is solved. This achieves the effect of improving driving safety and timely reminding the driver without adding any parts.
Patent Information
- Application Number
- CN202423158274.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing methods for indicating abnormalities in the vehicle's low-voltage circuit cannot cover more scenarios without adding components, especially when bus communication is lost, which can lead to driving safety hazards.
By detecting and diagnosing communication between the vehicle control unit (VCU) and the DC/DC converter, and by illuminating the fault indicator light in conjunction with the instrument module, more low-voltage circuit power supply abnormality scenarios are covered, including communication abnormalities, fault levels, and voltage abnormalities, so as to promptly remind the driver.
Without adding any components, it can cover more scenarios of low-voltage circuit power supply abnormality warnings, improve driving safety, promptly remind the driver, and allow more time for vehicle control.
Smart Images
Figure CN223877939U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of automobile, specifically, the utility model relates to a whole vehicle low-voltage loop power supply abnormity prompting system. BACKGROUND
[0002] At present, the existing prompt for the whole vehicle low-voltage loop abnormity usually refers to that when the direct current / direct current (DC / DC) converter works abnormally, the fault state is reported through the bus message to light the direct current / direct current (DC / DC) fault prompt lamp. However, the current prompting method is not perfect, for example, when the bus communication is lost, the prompt cannot be carried out, and if the vehicle continues to run, the vehicle may suddenly break down, which has great driving safety hazards.
[0003] In the patent CN113765166A, a DC / DC circuit, a fault detection method, a device and an automobile are disclosed, the DC / DC circuit comprises: a DC / DC controller connected with a low-voltage storage battery and a high-voltage battery pack, the DC / DC controller comprises: a current detection circuit for detecting the current at the low-voltage positive output port, a voltage detection circuit for detecting the voltage between the low-voltage positive output port and the low-voltage negative output port, and a control circuit connected with the current detection circuit and the voltage detection circuit.
[0004] However, the technology disclosed in the above patent cannot cover more prompt scenarios of the whole vehicle low-voltage loop power supply abnormity and carry out the prompt without increasing parts. UTILITY MODEL CONTENTS
[0005] The utility model solves the technical problem of the prior art, provides a whole vehicle low-voltage loop power supply abnormity prompting system to achieve the purpose of covering more prompt scenarios of the whole vehicle low-voltage loop power supply abnormity and carrying out the prompt without increasing parts.
[0006] In order to achieve the above purpose, the utility model adopts the technical scheme that:
[0007] The utility model provides a whole vehicle low-voltage loop power supply abnormity prompting system, which comprises a whole vehicle controller (VCU), an instrument module and a direct current / direct current (DC / DC) converter, the whole vehicle controller (VCU) is connected with the instrument module, and the whole vehicle controller (VCU) is connected with the direct current / direct current (DC / DC) converter.
[0008] Further, the whole vehicle controller (VCU) detects whether the communication with the direct current / direct current (DC / DC) converter is normal.
[0009] Further, when the vehicle control unit (VCU) detects that the communication with the direct current / direct current (DC / DC) converter is abnormal, the vehicle control unit (VCU) controls the instrument module to light up the direct current / direct current (DC / DC) fault prompt lamp after satisfying the fault diagnosis (Debounce) time.
[0010] Further, when the vehicle control unit (VCU) detects that the communication with the direct current / direct current (DC / DC) converter is normal, the direct current / direct current (DC / DC) converter feeds back the fault level information of itself to the vehicle control unit (VCU); and the direct current / direct current (DC / DC) converter feeds back the working state information of itself to the vehicle control unit (VCU).
[0011] Further, when the direct current / direct current (DC / DC) converter feeds back to the vehicle control unit (VCU) is a high-level fault, the vehicle control unit (VCU) controls the instrument module to light up the direct current / direct current (DC / DC) fault prompt lamp.
[0012] Further, when the working state of the direct current / direct current (DC / DC) converter fed back to the vehicle control unit (VCU) is fault (Fault), the vehicle control unit (VCU) controls the instrument module to light up the direct current / direct current (DC / DC) fault prompt lamp.
[0013] Further, when the direct current / direct current (DC / DC) converter feeds back to the vehicle control unit (VCU) is no fault and the working state fed back to the vehicle control unit (VCU) is normal (Normal), the vehicle control unit (VCU) detects the voltage of the vehicle low-voltage loop.
[0014] Further, when the vehicle control unit (VCU) detects that the voltage of the vehicle low-voltage loop is less than 12 volts and the duration that the voltage of the vehicle low-voltage loop is less than 12 volts is greater than a preset time threshold, the vehicle control unit (VCU) controls the instrument module to light up the direct current / direct current (DC / DC) fault prompt lamp.
[0015] Further, the preset time threshold is 5 seconds.
[0016] The vehicle low-voltage loop power supply abnormity prompting system has the following advantages:
[0017] (1) The vehicle low-voltage loop power supply abnormity prompting system can cover more vehicle low-voltage loop power supply abnormity prompting scenarios and prompt without increasing parts.
[0018] (2) After prompting the vehicle low-voltage loop power supply abnormity by the vehicle low-voltage loop power supply abnormity prompting system, the driver can be reminded in time, and the safety of driving is improved.
[0019] (3) The whole vehicle low-voltage circuit power supply abnormity prompting system can timely remind the driver when the high-level fault of the direct current / direct current (DC / DC) converter, the communication abnormity of the whole vehicle controller (VCU) and the direct current / direct current (DC / DC) converter, the working state fault (Fault) of the direct current / direct current (DC / DC) converter, more time is reserved for the driver to control the vehicle, and the safety is higher. BRIEF DESCRIPTION OF DRAWINGS
[0020] The present specification includes the following drawings, and the shown contents are respectively:
[0021] Figure 1 is the logic structure block diagram of the whole vehicle low-voltage circuit power supply abnormity prompting system of the utility model.
[0022] The figure mark is: 1, whole vehicle controller (VCU); 2, instrument module; 3, direct current / direct current (DC / DC) converter. DETAILED DESCRIPTION
[0023] The specific embodiment of the utility model is further explained in detail by the description of the embodiment by comparing with the drawings, the purpose is to help the technical personnel in the field to have more complete, accurate and in-depth understanding to the conception, technical scheme of the utility model, and help its implementation.
[0024] Figure 1 is the logic structure block diagram of the whole vehicle low-voltage circuit power supply abnormity prompting system of the utility model, including whole vehicle controller (VCU) 1, instrument module 2, direct current / direct current (DC / DC) converter 3, whole vehicle controller (VCU) 1 is connected with instrument module 2;Whole vehicle controller (VCU) 1 is connected with direct current / direct current (DC / DC) converter 3. Wherein, whole vehicle controller (VCU) 1 and direct current / direct current (DC / DC) converter 3 are connected respectively through bus and hard wire. In addition, instrument module 2 refers to automobile instrument module.
[0025] The working principle of the whole vehicle low-voltage circuit power supply abnormity prompting system of the utility model is introduced as follows: Figure 1
[0026] In the whole vehicle low-voltage loop power supply abnormality prompting system of the utility model, the vehicle controller (VCU) 1 detects whether the communication with the direct current / direct current (DC / DC) converter 3 is normal, that is, the vehicle controller (VCU) 1 will detect and judge whether the communication with the direct current / direct current (DC / DC) converter 3 is lost, when the vehicle controller (VCU) 1 detects that the communication with the direct current / direct current (DC / DC) converter 3 is abnormal, that is, when the vehicle controller (VCU) detects that the communication with the direct current / direct current (DC / DC) converter 3 is lost, then the vehicle controller (VCU) 1 controls the instrument module 2 to light the direct current / direct current (DC / DC) fault prompt lamp after meeting the fault diagnosis (Debounce) time, prevents misjudgment, so that the driver can be reminded in time when the communication between the vehicle controller (VCU) 1 and the direct current / direct current (DC / DC) converter 3 is abnormal, more time is reserved for the driver to control the vehicle, and it is more safe; when the vehicle controller (VCU) 1 detects that the communication with the direct current / direct current (DC / DC) converter 3 is normal, that is, when the vehicle controller (VCU) 1 detects and judges that the communication with the direct current / direct current (DC / DC) converter 3 is not lost, then the direct current / direct current (DC / DC) converter 3 feeds back the fault level information of itself to the vehicle controller (VCU) 1, and the direct current / direct current (DC / DC) converter 3 feeds back the working state information of itself to the vehicle controller (VCU) 1.When the high-level fault is fed back to the vehicle control unit (VCU) 1 by the direct current / direct current (DC / DC) converter 3, the vehicle control unit (VCU) 1 controls the instrument module 2 to light up the direct current / direct current (DC / DC) fault prompt lamp, that is, the driver can be timely reminded when the high-level fault of the direct current / direct current (DC / DC) converter 3, and the driver is given more time to control the vehicle, which is more secure; when the working state fed back to the vehicle control unit (VCU) 1 by the direct current / direct current (DC / DC) converter 3 is fault (Fault), the vehicle control unit (VCU) 1 controls the instrument module 2 to light up the direct current / direct current (DC / DC) fault prompt lamp, that is, the driver can be timely reminded when the working state fault (Fault) of the direct current / direct current (DC / DC) converter 3, and the driver is given more time to control the vehicle, which is more secure; when the no fault is fed back to the vehicle control unit (VCU) 1 by the direct current / direct current (DC / DC) converter 3 and the working state fed back to the vehicle control unit (VCU) 1 is normal (Normal), the vehicle control unit (VCU) 1 detects the voltage of the vehicle low-voltage loop, and when the vehicle control unit (VCU) 1 detects that the voltage of the vehicle low-voltage loop is less than 12 volts and the duration that the voltage of the vehicle low-voltage loop is less than 12 volts is greater than a preset time threshold, the vehicle control unit (VCU) 1 controls the instrument module 2 to light up the direct current / direct current (DC / DC) fault prompt lamp, that is, when the vehicle control unit (VCU) 1 judges that the voltage of the vehicle low-voltage loop is less than 12 volts, the vehicle control unit (VCU) 1 will judge whether the duration that the voltage of the vehicle low-voltage loop is less than 12 volts is greater than a preset time threshold, and if the vehicle control unit (VCU) 1 judges that the duration that the voltage of the vehicle low-voltage loop is less than 12 volts is greater than a preset time threshold, the vehicle control unit (VCU) 1 will control the instrument module 2 to light up the direct current / direct current (DC / DC) fault prompt lamp. Thus, more vehicle low-voltage loop power supply abnormality prompt scenarios can be covered without increasing parts, the driver can be timely reminded, and the safety of driving is improved.
[0027] In the specific embodiment, the preset time threshold is 5 seconds.
[0028] Effects of implementation
[0029] The vehicle control unit (VCU) 1 detects whether the communication with the direct current / direct current (DC / DC) converter 3 is normal, that is, the vehicle control unit (VCU) 1 detects and judges whether the communication with the direct current / direct current (DC / DC) converter 3 is lost, when the vehicle control unit (VCU) 1 detects that the communication with the direct current / direct current (DC / DC) converter 3 is abnormal, that is, when the vehicle control unit (VCU) detects that the communication with the direct current / direct current (DC / DC) converter 3 is lost, the vehicle control unit (VCU) 1 controls the instrument module 2 to light up the direct current / direct current (DC / DC) fault prompt lamp after satisfying the fault diagnosis (Debounce) time, preventing misjudgment, so that the driver can be reminded in time when the communication between the vehicle control unit (VCU) 1 and the direct current / direct current (DC / DC) converter 3 is abnormal, and more time is reserved for the driver to control the vehicle, which is more secure; when the vehicle control unit (VCU) 1 detects that the communication with the direct current / direct current (DC / DC) converter 3 is normal, that is, when the vehicle control unit (VCU) 1 detects and judges that the communication with the direct current / direct current (DC / DC) converter 3 is not lost, the direct current / direct current (DC / DC) converter 3 feeds back the fault level information of itself to the vehicle control unit (VCU) 1, and at the same time, the direct current / direct current (DC / DC) converter 3 feeds back the working state information of itself to the vehicle control unit (VCU) 1.When the high-level fault is fed back to the vehicle control unit (VCU) 1 by the direct current / direct current (DC / DC) converter 3, the vehicle control unit (VCU) 1 controls the instrument module 2 to light the direct current / direct current (DC / DC) fault prompt lamp, that is, the driver can be timely reminded when the high-level fault of the direct current / direct current (DC / DC) converter 3, and more time is reserved for the driver to control the vehicle, which is more secure; when the working state of the direct current / direct current (DC / DC) converter 3 is fed back to the vehicle control unit (VCU) 1 as fault (Fault), the vehicle control unit (VCU) 1 controls the instrument module 2 to light the direct current / direct current (DC / DC) fault prompt lamp, that is, the driver can be timely reminded when the working state of the direct current / direct current (DC / DC) converter 3 is fault (Fault), and more time is reserved for the driver to control the vehicle, which is more secure; when the no fault is fed back to the vehicle control unit (VCU) 1 by the direct current / direct current (DC / DC) converter 3 and the working state fed back to the vehicle control unit (VCU) 1 is normal (Normal), the vehicle control unit (VCU) 1 detects the voltage of the vehicle low-voltage loop, and when the vehicle control unit (VCU) 1 detects that the voltage of the vehicle low-voltage loop is less than 12 volts and the duration that the voltage of the vehicle low-voltage loop is less than 12 volts is greater than a preset time threshold, the vehicle control unit (VCU) 1 controls the instrument module 2 to light the direct current / direct current (DC / DC) fault prompt lamp, that is, when the vehicle control unit (VCU) 1 judges that the voltage of the vehicle low-voltage loop is less than 12 volts, the vehicle control unit (VCU) 1 judges whether the duration that the voltage of the vehicle low-voltage loop is less than 12 volts is greater than a preset time threshold, and if the vehicle control unit (VCU) 1 judges that the duration that the voltage of the vehicle low-voltage loop is less than 12 volts is greater than a preset time threshold, the vehicle control unit (VCU) 1 controls the instrument module 2 to light the direct current / direct current (DC / DC) fault prompt lamp. Thus, more prompt scenarios of vehicle low-voltage loop power supply abnormalities can be covered without increasing parts, the driver can be timely reminded, and the safety of driving is improved.
[0030] The utility model is described exemplarily above in combination with the drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned mode. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model, or the above-mentioned concept and technical scheme of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.
Claims
1. A vehicle low-voltage circuit power supply abnormality prompting system characterized by comprising: a vehicle low-voltage circuit power supply abnormality prompting device; and a vehicle low-voltage circuit power supply abnormality prompting method. The vehicle controller unit (VCU) is connected with the instrument module and the direct current / direct current (DC / DC) converter.
2. The system for prompting power supply abnormality of a low-voltage circuit of a whole vehicle according to claim 1, characterized in that: The vehicle controller unit (VCU) detects whether the communication with the direct current / direct current (DC / DC) converter is normal.
3. The system of claim 2, wherein the system further comprises: a low voltage circuit power supply abnormality detection unit configured to detect an abnormality in the low voltage circuit power supply; and a low voltage circuit power supply abnormality notification unit configured to notify the abnormality in the low voltage circuit power supply. When the vehicle controller unit (VCU) detects that the communication with the direct current / direct current (DC / DC) converter is abnormal, the vehicle controller unit (VCU) controls the instrument module to light up the direct current / direct current (DC / DC) fault prompt lamp after satisfying the fault diagnosis (Debounce) time.
4. The system for prompting power supply abnormality of a low-voltage circuit of a whole vehicle according to claim 2, characterized in that: When the vehicle controller unit (VCU) detects that the communication with the direct current / direct current (DC / DC) converter is normal, the direct current / direct current (DC / DC) converter feeds back the fault level information of itself to the vehicle controller unit (VCU), and feeds back the working state information of itself to the vehicle controller unit (VCU).
5. The system for prompting power supply abnormality of a low-voltage circuit of a whole vehicle according to claim 4, characterized in that: When the direct current / direct current (DC / DC) converter feeds back to the vehicle controller unit (VCU) is a high-level fault, the vehicle controller unit (VCU) controls the instrument module to light up the direct current / direct current (DC / DC) fault prompt lamp.
6. The system for prompting power supply abnormality of a low pressure circuit of a whole vehicle according to claim 4, characterized in that: When the working state of the direct current / direct current (DC / DC) converter fed back to the vehicle controller unit (VCU) is fault (Fault), the vehicle controller unit (VCU) controls the instrument module to light up the direct current / direct current (DC / DC) fault prompt lamp.
7. The system for prompting power supply abnormality of a low pressure circuit of a whole vehicle according to claim 4, characterized in that: When the direct current / direct current (DC / DC) converter feeds back to the vehicle controller unit (VCU) is no fault and the working state fed back to the vehicle controller unit (VCU) is normal (Normal), the vehicle controller unit (VCU) detects the voltage of the vehicle low-voltage loop.
8. The system for prompting power supply abnormality of a low-voltage circuit of a whole vehicle according to claim 7, characterized in that: When the vehicle controller unit (VCU) detects that the voltage of the vehicle low-voltage loop is less than 12 volts and the duration that the voltage of the vehicle low-voltage loop is less than 12 volts is greater than a preset time threshold, the vehicle controller unit (VCU) controls the instrument module to light up the direct current / direct current (DC / DC) fault prompt lamp.
9. The system of claim 8, wherein the system further comprises: a low voltage circuit power supply abnormality detection unit configured to detect an abnormality in the low voltage circuit power supply; and a display unit configured to display the abnormality in the low voltage circuit power supply. The preset time threshold is 5 seconds.