CN218678531U - Low-voltage power supply network intelligent safety system - Google Patents
Low-voltage power supply network intelligent safety system Download PDFInfo
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- CN218678531U CN218678531U CN202221007471.1U CN202221007471U CN218678531U CN 218678531 U CN218678531 U CN 218678531U CN 202221007471 U CN202221007471 U CN 202221007471U CN 218678531 U CN218678531 U CN 218678531U
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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Abstract
The utility model discloses a low voltage power supply network intelligence safety coefficient, low voltage power supply network intelligence safety coefficient sets up between DCDC circuit and safety ECU, and by UEC fuse, the IEC fuse, control point M1, control point M2, control point M3, control point M4, control point M5, control point M6 and switch E1, switch E2, switch E3, switch E4, switch E5 constitutes, effectively solved the voltage of DCDC circuit output and appear undulant back, in time switch stand-by power supply prevents that safety ECU from causing the damage.
Description
Technical Field
The utility model relates to an energy automobile and intelligent networking automobile field specifically are a low voltage power supply network intelligent security system.
Background
The new energy automobile adopts unconventional automobile fuel as a power source (or adopts conventional automobile fuel and a novel vehicle-mounted power device), integrates advanced technologies in the aspects of power control and driving of the automobile, and forms an automobile with advanced technical principle, new technology and new structure; intelligent networked automobile (ICV) refers to the organic association of the internet of vehicles and Intelligent vehicles, and is a new generation automobile which carries advanced Vehicle-mounted sensors, controllers, actuators and other devices, integrates modern communication and network technologies, realizes Intelligent information exchange and sharing between vehicles and people, roads, backgrounds and the like, realizes safe, comfortable, energy-saving and efficient driving, and can finally replace people to operate.
When the existing energy automobile and the intelligent networking automobile are used, the output voltage of the battery is converted by the DC/DC converter and then is provided for the vehicle-mounted ECU, and when the voltage transformed by the DC/DC converter fluctuates, the vehicle-mounted ECU is greatly influenced, so that an intelligent safety system of a low-voltage power supply network is needed, the power supply output by the DC/DC converter is detected, and if the voltage fluctuates, the power supply is timely adjusted.
The intelligent safety system of the low-voltage power supply network is a safety system installed on a new energy vehicle, when the voltage of an automobile circuit fluctuates, a circuit safety protection device can act in a short time to complete the electricity changing operation, so that the normal operation of each working platform in the automobile is realized, particularly the requirement on redundant power supply under the Level3 automatic driving scene is met, and the PNC meets the intelligent redundant power supply of function safety ASILD for preventing overvoltage and undervoltage. The situations of vehicle power loss, steering loss, braking loss and the like which are caused by faults of power supply overvoltage, undervoltage, short circuit and the like and dynamic driving task capacity (DDT) loss are effectively prevented.
Based on this, the utility model designs a low pressure power supply network intelligence safety coefficient to solve above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an intelligent safety system of a low-voltage power supply network, which aims to solve the requirement of redundancy (when one power supply fails, the other power supply can take over the work immediately) of the automatic driving low-voltage power supply of an automobile; the low-voltage power supply meets the design of the functional safety requirement of ASILD (safety level); and the cost of redundant power supply hardware of the low-voltage power supply is reduced.
In order to achieve the above object, the utility model provides a following technical scheme: the intelligent safety system of the low-voltage power supply network is arranged between a DCDC circuit and a safety ECU, and consists of a UEC fuse, an IEC fuse, a monitoring point M1, a monitoring point M2, a monitoring point M3, a monitoring point M4, a monitoring point M5, a monitoring point M6, a switch E1, a switch E2, a switch E3, a switch E4 and a switch E5, wherein the UEC and the IEC are connected in parallel to a bus, and are connected with the switch E1, the switch E2 and the switch E3 in series and arranged on the bus, a battery is connected to the bus and arranged on the right side of the switch E3, one ends of two branch lines are respectively connected between the switch E1 and the switch E2 and between the switch E2 and the switch E3, the safety ECU comprises an EPS, a BCU, an ADC, a CDC and a CGW which are respectively connected in parallel to the two branch lines, the switches E4 and E5 are respectively arranged between the two branch lines and a working platform, the monitoring point M1 is arranged on the left side of the main line, the monitoring point M2 and the two branch lines, the monitoring point M4 and the monitoring point E5 are respectively arranged at interfaces of the main line, and the safety switch E3.
Furthermore, the EPS and the BCU in the safety ECU are provided with two power supply access ports which are respectively and electrically connected to the two branch wires.
Furthermore, the battery is an alternative power supply, and when the working voltage fluctuates, the battery gets power from the alternative power supply.
Furthermore, the monitoring point M1, the monitoring point M2, the monitoring point M3, the monitoring point M4, the monitoring point M5 and the monitoring point M6 are used for monitoring the voltage conditions of the bus and the branch line.
Furthermore, the working process is as follows:
a. when the DCDC voltage is higher than the working voltage of each working platform, the switch E1 is closed at the moment to isolate the DCDC circuit, if the switch E1 fails to be closed, the switch E2 and the switch E4 are closed, the current is disconnected between the DCDC circuit and each working platform at the moment, the safety ECU obtains electricity from the battery through the monitoring point M5,
b. when the voltage at the monitoring point M1 is lower than the working voltage of each working platform due to the fact that the DCDC voltage or the ground short circuit occurs between the E1 and the DCDC, the switch E1 is closed to isolate the DCDC circuit, if the switch E1 fails to be closed, the switch E2 and the switch E4 are closed, the current is disconnected between the DCDC circuit and each working platform, the safety ECU obtains electricity from the battery through the monitoring point M5,
c. when the power utilization network measured by UEC/IEC has a short circuit, the switch E1 is closed at the moment, the DCDC circuit is isolated, if the switch E1 fails to be closed, the switches E2 and E4 are closed, the DCDC circuit is disconnected with each working platform at the moment, the safety ECU obtains electricity from the battery through the monitoring point M5,
d. when the voltage of the monitoring point M4 is too low, the switch E4 is closed, the failed ECU circuit is isolated, if the E4 is failed to be closed, the switch E2 is closed, the safety ECU obtains electricity from the battery through the monitoring point M5,
e. when the voltage of the monitoring point M5 is too low, the switch E5 is closed, the failed ECU circuit is isolated, if the E5 is failed to be closed, the switch E2 is closed, the safety ECU obtains electricity from the battery through the monitoring point M4,
f. when the battery voltage is too low or a short circuit to the ground occurs between the E3 and the battery, the E3 is closed, the battery is isolated, if the E3 is not closed, the switch E2 is closed, and the safety ECU obtains electricity from the battery through the monitoring point M4.
Compared with the prior art, the beneficial effects of the utility model are that:
the intelligent safety system of the low-voltage power supply network has a compact structure and reasonable design, and solves the problem of redundancy of the automatic driving low-voltage power supplies (when one power supply fails, the other power supply can take over the work of the other power supply at once); an intelligent safety system of a low-voltage power supply network is arranged between a DCDC circuit and a safety ECU (electronic control unit), so that the problem that the safety ECU is damaged by timely switching a standby power supply after the voltage of the DCDC circuit is transformed fluctuates is effectively solved, and the low-voltage power supply of the system meets the design of the functional safety requirement of ASIL D (safety class); the cost of redundant power supply hardware of the low-voltage power supply is greatly reduced;
compared with the existing products on the market, the product has the advantages that:
a. the single part realizes the functional safety requirement of overvoltage and undervoltage of a low-voltage power grid of the ASIL D.
b. The size is small.
c. The cost is low.
d. Conveniently integrated with a low voltage battery or DCDC.
e. The application matching is convenient, and the requirements of self-driving level3 and above vehicles on the redundant power distribution and function safety of the low-voltage power grid can be directly realized based on the traditional low-voltage power grid.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a circuit diagram of the intelligent safety system of the low-voltage power supply network of 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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The utility model discloses a low voltage power supply network intelligent security system
The safety ECU obtains electricity through a UEC fuse and an IEC fuse, the battery is a safety ECU alternative power supply, and when the UEC and IEC voltages fluctuate, the battery disconnects the non-safety related power grid through E1 of the PNG and continuously supplies redundant power to the safety related ECU.
The intelligent safety system of the low-voltage power supply network is arranged between a DCDC circuit and a safety ECU and consists of a UEC fuse, an IEC fuse, a monitoring point M1, a monitoring point M2, a monitoring point M3, a monitoring point M4, a monitoring point M5, a monitoring point M6, a switch E1, a switch E2, a switch E3, a switch E4 and a switch E5, wherein the UEC and the IEC are connected in parallel to a bus and are connected with the switch E1, the switch E2 and the switch E3 in series to be installed on the bus, a battery is connected to the bus and is positioned at the right side of the switch E3, one end of each of two branch lines is respectively connected between the switch E1 and the switch E2 and between the switch E2 and the switch E3, the safety ECU EPS, the BCU, the ADC, the CDC and the CGW are respectively connected in parallel to the two branch lines, the switches E4 and the E5 are respectively installed between the two branch lines and a working platform, the monitoring point M1 is arranged on the main line and is positioned at the left side of the switch E1, the monitoring point M2 and the main line are respectively installed between the switch E4 and the main line, the switch E5 and the switch E3, and the safety point E3,
the working platform EPS and BCU are provided with two power supply access ports and are respectively connected to two branch lines
When in use
In the power supply process of the electric automobile, the fluctuation of the power supply voltage can occur, each monitoring point monitors the voltage in real time,
when the DCDC voltage is higher than the working voltage of each working platform, the switch E1 is closed at the moment to isolate the DCDC circuit, if the switch E1 fails to be closed, the switch E2 and the switch E4 are closed, the current is disconnected between the DCDC circuit and each working platform at the moment, the safety ECU obtains electricity from the battery through the monitoring point M5, the safety ECU circuit supplies power for each working platform,
when the voltage at the monitoring point M1 is lower than the working voltage of each working platform due to the fact that the voltage of the DCDC or the ground short circuit occurs between the E1 and the DCDC, the switch E1 is closed at the moment to isolate the DCDC circuit, if the switch E1 is failed to be closed, the switches E2 and E4 are closed, the current is disconnected between the DCDC circuit and each working platform at the moment, the safety ECU obtains electricity from the battery through the monitoring point M5, the safety ECU circuit supplies power for each working platform,
when the power utilization network measured by UEC/IEC has a short circuit, the switch E1 is closed, the DCDC circuit is isolated, if the switch E1 fails to be closed, the switches E2 and E4 are closed, at the moment, the DCDC circuit is disconnected with each working platform, the safety ECU obtains electricity from the battery through the monitoring point M5, the safety ECU circuit supplies power for each working platform,
when the voltage of the monitoring point M4 is too low, the switch E4 is closed, the failed ECU circuit is isolated, if the E4 is failed to be closed, the switch E2 is closed, the safety ECU obtains electricity from the battery through the monitoring point M5 to supply power for each working platform,
when the voltage of the monitoring point M5 is too low, the switch E5 is closed, the ECU circuit which fails is isolated, if the E5 is failed to be closed, the switch E2 is closed, the safety ECU obtains electricity from the battery through the monitoring point M4 to supply power for each working platform,
when the battery voltage is too low or a short circuit to the ground occurs between the E3 and the battery, the E3 is closed, the battery is isolated, if the E3 is not closed, the switch E2 is closed, and the safety ECU obtains electricity from the battery through the monitoring point M4.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (4)
1. A low-voltage power supply network intelligent safety system is characterized in that: the intelligent safety system of the low-voltage power supply network is arranged between a DCDC circuit and a safety ECU, and consists of a UEC fuse, an IEC fuse, a monitoring point M1, a monitoring point M2, a monitoring point M3, a monitoring point M4, a monitoring point M5, a monitoring point M6, a switch E1, a switch E2, a switch E3, a switch E4 and a switch E5, wherein the UEC and the IEC are connected in parallel to a bus, and are connected in series with the switch E1, the switch E2 and the switch E3 and are arranged on the bus, a battery is connected to the bus and is arranged on the right side of the switch E3, one end of each branch line is connected between the switch E1 and the switch E2, and one end of each branch line is connected between the switch E2 and the switch E3, the safety ECU comprises an EPS, a BCU, an ADC, a CDC and a CGW which are connected in parallel to the two branch lines, respectively, the switches E4 and the switch E5 are arranged between the two branch lines and a working platform, the monitoring point M1 is arranged on the main line and on the left side of the switch E1, the monitoring point M2 and the monitoring point M3 are arranged at interfaces of the main line and the two branch lines, and the ECU, and the battery E4, the monitoring point M5 are arranged between the switches and the switches E6.
2. A low voltage power supply network intelligent security system of claim 1, wherein: EPS and BCU in the safety ECU are provided with two power supply access ports which are respectively and electrically connected to two branch lines.
3. A low voltage power supply network intelligent security system of claim 1, wherein: the battery is an alternative power supply, and when the working voltage fluctuates, the battery obtains electricity from the alternative power supply.
4. A low voltage power supply network intelligent security system of claim 1, wherein: the monitoring point M1, the monitoring point M2, the monitoring point M3, the monitoring point M4, the monitoring point M5 and the monitoring point M6 are used for monitoring the voltage conditions of the bus and the branch line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221007471.1U CN218678531U (en) | 2022-04-27 | 2022-04-27 | Low-voltage power supply network intelligent safety system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221007471.1U CN218678531U (en) | 2022-04-27 | 2022-04-27 | Low-voltage power supply network intelligent safety system |
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| Publication Number | Publication Date |
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| CN218678531U true CN218678531U (en) | 2023-03-21 |
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| CN202221007471.1U Active CN218678531U (en) | 2022-04-27 | 2022-04-27 | Low-voltage power supply network intelligent safety system |
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