CN113306396A - DCDC (direct current DC) awakening system and method for pure electric vehicle - Google Patents
DCDC (direct current DC) awakening system and method for pure electric vehicle Download PDFInfo
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- CN113306396A CN113306396A CN202110760699.1A CN202110760699A CN113306396A CN 113306396 A CN113306396 A CN 113306396A CN 202110760699 A CN202110760699 A CN 202110760699A CN 113306396 A CN113306396 A CN 113306396A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/10—DC to DC converters
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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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- 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
- Y02T10/72—Electric energy management in electromobility
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a DCDC (direct current DC) awakening system and an DCDC awakening method for a pure electric vehicle, wherein the system comprises the following components: the control output end of the vehicle control unit is connected with the DCDC converter and the high-voltage storage battery, the power output end of the high-voltage storage battery is connected with the power input end of the DCDC converter, and the low-voltage output end of the DCDC converter is connected with the power input end of the low-voltage storage battery and the power input end of each low-voltage load. The pure electric vehicle DCDC awakening system and the awakening method can enable the pure electric vehicle DCDC converter to respond to the whole vehicle awakening work instruction in time, and avoid the problems of deep discharge of a low-voltage storage battery and power interruption of the whole vehicle caused by long-time non-work of the DCDC converter.
Description
Technical Field
The invention relates to the technical field of electric vehicle awakening, in particular to a DCDC awakening system and an awakening method for a pure electric vehicle.
Background
The DCDC converter is also called a direct current voltage converter, is a core part for ensuring normal power supply of low-voltage parts for the new-energy pure electric vehicle, mainly functions to convert high-voltage direct current of a power battery of the whole vehicle into 12V or 24V low-voltage direct current, provides a power supply for stable work of low-voltage electric appliances of the whole vehicle, has a function of charging a low-voltage lead-acid storage battery for the vehicle, and is an indispensable key part for the new-energy pure electric vehicle.
The main drawbacks of the currently used DCDC converters are: the low-voltage storage battery is deeply discharged, the service life of the low-voltage storage battery is shortened, the vehicle cost is increased, and in severe cases, the power of the whole vehicle is interrupted, and personal safety is harmed.
Therefore, a DCDC wake-up system and a wake-up method for a pure electric vehicle are needed.
Disclosure of Invention
The invention aims to provide a pure electric vehicle DCDC awakening system and an awakening method, which are used for solving the problems in the prior art and ensuring that the DCDC can stably and reliably respond to a finished vehicle instruction in time.
The invention provides a DCDC (direct current DC) awakening system of a pure electric vehicle, which comprises the following components:
the control output end of the vehicle control unit is connected with the DCDC converter and the high-voltage storage battery, the power output end of the high-voltage storage battery is connected with the power input end of the DCDC converter, and the low-voltage output end of the DCDC converter is connected with the power input end of the low-voltage storage battery and the power input end of each low-voltage load.
The pure electric vehicle DCDC awakening system preferably further comprises a CAN communication chip, which is arranged in the DCDC converter and used for transmitting CAN communication signals between the DCDC converter and the high-voltage storage battery to a whole vehicle CAN network.
The invention also provides a pure electric vehicle DCDC awakening method adopting the method, which comprises the following steps:
s1, sending a CAN awakening message and an EN enabling high-level signal by the vehicle controller under the condition of high voltage on the vehicle;
step S2, determining whether to awaken the DCDC converter according to whether the DCDC converter receives the CAN awakening message and/or the EN enabling high level signal, if only receiving a CAN awakening instruction and not receiving the EN enabling high level signal, awakening the DCDC converter, executing step S3, if only receiving the EN enabling high level signal, awakening the DCDC converter, and executing step S4;
step S3, waiting for detecting a CAN working instruction sent by the vehicle controller, and executing step S4 if the CAN working instruction is received;
and step S4, detecting whether the DCDC high voltage meets the working requirement of the DCDC converter, if so, starting the DCDC converter to work, outputting low-voltage direct current to supply power for the low-voltage storage battery and supplying power to a low-voltage load.
The pure electric vehicle DCDC wake-up method as described above, wherein preferably, the pure electric vehicle DCDC wake-up method further includes:
and step S5, when the DCDC high voltage does not meet the working requirement of the DCDC converter, reporting the DCDC high voltage fault, and continuously detecting the whole vehicle high voltage until the working requirement of the DCDC converter is met, and then executing step S4.
The DCDC wake-up method for the pure electric vehicle, preferably, in step S1, when high voltage is applied to the entire vehicle, the entire vehicle controller sends a CAN wake-up message and an EN enable high level signal, and the method specifically includes:
and when the whole vehicle keyon is in high voltage, the whole vehicle controller sends a CAN awakening message and an EN enabling high-level signal to the CAN bus through the CAN communication chip.
The DCDC wake-up method for the pure electric vehicle as described above, wherein preferably, the step S2 determines whether to wake up the DCDC converter according to whether the DCDC converter receives the CAN wake-up message and/or the EN enable high level signal, and specifically includes:
step S21, if the CAN communication chip receives a CAN awakening work message sent by the vehicle controller and the DCDC converter detects an EN enabling high level signal, awakening the DCDC converter and jumping to the step S4;
step S22, if the CAN communication chip receives a CAN awakening work message sent by the vehicle controller and the DCDC converter does not detect an EN enabling high level signal, the DCDC converter keeps an awakening state, reports an EN high level signal abnormal fault to a vehicle CAN bus through the CAN communication chip, and jumps to step S3;
and step S23, if the DCDC converter detects an EN enabling high level signal and the CAN communication chip does not receive a wake-up working message sent by the whole vehicle controller, the DCDC converter reports a CAN communication abnormal fault to the whole vehicle CAN bus through the CAN communication chip and skips to step S4.
The pure electric vehicle DCDC wake-up method as described above, wherein preferably, the CAN communication chip is disposed in a hardware circuit of the DCDC converter.
In the DCDC wake-up method for the pure electric vehicle, preferably, in the steps S21 to S23, the EN enable high signal is detected by the hardware circuit of the DCDC converter.
In the pure electric vehicle DCDC wake-up method, preferably, in step S22, the system-side single chip microcomputer of the DCDC converter is used to report an EN high-level signal abnormal fault to the entire vehicle CAN bus through the CAN communication chip; in the step S23, a system-side single chip of the DCDC converter is used to report a CAN communication abnormal fault to the entire vehicle CAN bus through the CAN communication chip.
The pure electric vehicle DCDC wake-up method as described above, wherein preferably, the step S4 of detecting whether the DCDC high voltage meets the operating requirement of the DCDC converter specifically includes:
and detecting the high-voltage bus voltage of the DCDC converter through a high-voltage direct-current side single chip microcomputer of the DCDC converter, feeding the detection result back to a system side single chip microcomputer of the DCDC converter, and judging whether the high-voltage bus voltage of the DCDC converter meets the working requirement of the DCDC converter or not according to the detection result by the system side single chip microcomputer.
The invention provides a pure electric vehicle DCDC awakening system and an awakening method, which can enable a pure electric vehicle DCDC converter to respond to a whole vehicle awakening work instruction in time and avoid the problems of deep discharge of a low-voltage storage battery and power interruption of a whole vehicle caused by long-time non-work of the DCDC converter.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:
fig. 1 is a structural block diagram of an embodiment of a DCDC wake-up system of a pure electric vehicle according to the present invention;
FIG. 2 is a flowchart of an embodiment of a DCDC wake-up method for a blade electric vehicle according to the present invention;
fig. 3 is a working schematic diagram of an embodiment of a DCDC wake-up method for a pure electric vehicle according to the present invention.
Description of reference numerals:
1-vehicle controller 2-DCDC converter 3-high voltage storage battery
4-low voltage accumulator 5-low voltage load
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
As used in this disclosure, "first", "second": and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific component is described as being located between a first component and a second component, there may or may not be intervening components between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without having an intervening component, or may be directly connected to the other components without having an intervening component.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
As shown in fig. 1, the present invention provides a DCDC wake-up system for a pure electric vehicle, including:
the vehicle-mounted controller comprises a vehicle controller 1, a DCDC converter 2, a low-voltage storage battery 4, a high-voltage storage battery 3 and a plurality of low-voltage loads 5, wherein a control output end of the vehicle controller 1 is connected with the DCDC converter 2 and the high-voltage storage battery 3, a power output end of the high-voltage storage battery 3 is connected with a power input end of the DCDC converter 2, and a low-voltage output end of the DCDC converter 2 is connected with a power input end of the low-voltage storage battery 4 and a power input end of each low-voltage load 5.
Further, the pure electric vehicle DCDC awakening system further comprises a CAN communication chip which is arranged in the DCDC converter 2 and used for transmitting CAN communication signals between the DCDC converter 2 and the high-voltage storage battery 3 to a whole vehicle CAN network.
In operation, CAN communication signals of the DCDC converter 2 and the high-voltage storage battery 3 are transmitted into a finished automobile CAN network through a CAN communication chip, so that information interaction between the DCDC converter 2 and the high-voltage storage battery 3 and the finished automobile controller 1 is realized. When the whole vehicle detects a key signal, the whole vehicle controller 1 sends an instruction to the CAN communication chips of the high-voltage storage battery 3 and the DCDC converter 2 to require the whole vehicle to be powered on at high voltage, and simultaneously starts to perform self-checking whether a high-voltage system of the whole vehicle is powered on or not. If the power-on is completed, the vehicle control unit 1 sends a specific message to the specific ID of the CAN bus through the CAN communication chip, and after the CAN communication chip of the DCDC converter 2 receives the specific message sent by the vehicle control unit 1 on the CAN bus, the vehicle control unit responds in real time to complete the starting-up work and outputs 13.8V voltage, so that the power is supplied to the low-voltage load 5 of the vehicle and the power is supplemented to the low-voltage storage battery 4. Through the vehicle control unit 1, the DCDC converter 2, the low-voltage storage battery 4 and the high-voltage storage battery 3, the DCDC converter of the pure electric vehicle can timely respond to a vehicle wake-up working instruction, and the problems of deep discharge of the low-voltage storage battery and power interruption of the vehicle caused by long-time non-working of the DCDC converter are avoided.
The pure electric vehicle DCDC awakening system provided by the embodiment of the invention can enable the pure electric vehicle DCDC converter to timely respond to the whole vehicle awakening work instruction, and avoid the problems of deep discharge of a low-voltage storage battery and power interruption of the whole vehicle caused by long-time non-work of the DCDC converter.
As shown in fig. 2, in an actual execution process of the DCDC wake-up method for the pure electric vehicle provided by this embodiment, the method specifically includes the following steps:
and step S1, sending CAN awakening messages and EN enabling high-level signals by the vehicle controller 1 under the condition of high voltage on the vehicle.
The EN enable high signal may be, for example, a 12V EN enable high signal. Specifically, when the entire vehicle keyon is in high voltage, the entire vehicle controller 1 sends a CAN wake-up message and an EN enable high-level signal to the CAN bus through the CAN communication chip. Wherein, the CAN communication chip is arranged in a hardware circuit of the DCDC converter 2.
Step S2, determining whether to wake up the DCDC converter 2 according to whether the DCDC converter 2 receives the CAN wake-up message and/or the EN enable high level signal, if only the CAN wake-up command is received and the EN enable high level signal is not received, waking up the DCDC converter 2, and executing step S3, if only the EN enable high level signal is received, waking up the DCDC converter 2, and executing step S4.
In an embodiment of the DCDC wake-up method for the pure electric vehicle according to the present invention, the step S2 may specifically include:
and step S21, if the CAN communication chip receives a CAN awakening work message sent by the vehicle control unit 1 and the DCDC converter 2 detects an EN enabling high level signal, awakening the DCDC converter 2 and skipping to step S4.
Step S22, if the CAN communication chip receives a CAN wake-up working message sent by the vehicle controller 1 and the DCDC converter 2 does not detect the EN enable high level signal, the DCDC converter 2 keeps a wake-up state, and simultaneously the DCDC converter 2 reports an EN high level signal abnormal fault to the vehicle CAN bus through the CAN communication chip and jumps to step S3.
In the step S22, the system-side single chip of the DCDC converter 2 is used to report the EN high-level signal abnormal fault to the vehicle CAN bus through the CAN communication chip.
And step S23, if the DCDC converter 2 detects an EN enabling high level signal and the CAN communication chip does not receive the awakening work message sent by the vehicle controller 1, the DCDC converter 2 reports a CAN communication abnormal fault to the vehicle CAN bus through the CAN communication chip and skips to step S4.
In the step S23, the system-side single chip of the DCDC converter 2 is used to report the CAN communication abnormal fault to the vehicle CAN bus through the CAN communication chip.
As described above, the CAN communication chip is provided in the hardware circuit of the DCDC converter 2. Further, in step S21 to step S23, the EN enable high level signal is detected by the hardware circuit of the DCDC converter 2.
And step S3, waiting for detection of a CAN working instruction sent by the vehicle controller 1, and executing step S4 if the CAN working instruction is received.
And step S4, detecting whether the DCDC high voltage meets the working requirement of the DCDC converter 2, if so, starting the DCDC converter 2 to work, outputting low-voltage direct current to supply power for the low-voltage storage battery 4 and supplying power to the low-voltage load 5.
Specifically, the high-voltage bus voltage of the DCDC converter 2 is detected by the high-voltage direct-current side single chip microcomputer of the DCDC converter 2, and the detection result is fed back to the system side single chip microcomputer of the DCDC converter 2, and the system side single chip microcomputer judges whether the high-voltage bus voltage of the DCDC converter 2 meets the working requirement of the DCDC converter 2 according to the detection result.
Further, in some embodiments of the present invention, the DCDC wake-up method for the pure electric vehicle further includes:
and step S5, when the DCDC high voltage does not meet the working requirement of the DCDC converter 2, reporting the DCDC high voltage fault, and continuously detecting the whole vehicle high voltage until the working requirement of the DCDC converter 2 is met, and then executing step S4.
According to the DCDC awakening method for the pure electric vehicle, whether the DCDC converter is awakened or not is determined according to whether the DCDC converter receives the CAN awakening message and the EN enabling high-level signal sent by the vehicle control unit or not, the DCDC CAN be ensured to be awakened and operated stably and reliably, and the adverse vehicle using effect caused by the fact that the DCDC cannot respond to the vehicle awakening operation instruction in time is avoided.
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (10)
1. The utility model provides a pure electric vehicles DCDC awakens up system which characterized in that includes:
the control output end of the vehicle control unit is connected with the DCDC converter and the high-voltage storage battery, the power output end of the high-voltage storage battery is connected with the power input end of the DCDC converter, and the low-voltage output end of the DCDC converter is connected with the power input end of the low-voltage storage battery and the power input end of each low-voltage load.
2. The pure electric vehicle DCDC awakening system according to claim 1, further comprising a CAN communication chip disposed in said DCDC converter for transmitting CAN communication signals between said DCDC converter and said high-voltage battery to a vehicle CAN network.
3. A DCDC awakening method for a pure electric vehicle is characterized by comprising the following steps:
s1, sending a CAN awakening message and an EN enabling high-level signal by the vehicle controller under the condition of high voltage on the vehicle;
step S2, determining whether to awaken the DCDC converter according to whether the DCDC converter receives the CAN awakening message and/or the EN enabling high level signal, if only receiving a CAN awakening instruction and not receiving the EN enabling high level signal, awakening the DCDC converter, executing step S3, if only receiving the EN enabling high level signal, awakening the DCDC converter, and executing step S4;
step S3, waiting for detecting a CAN working instruction sent by the vehicle controller, and executing step S4 if the CAN working instruction is received;
and step S4, detecting whether the DCDC high voltage meets the working requirement of the DCDC converter, if so, starting the DCDC converter to work, outputting low-voltage direct current to supply power for the low-voltage storage battery and supplying power to a low-voltage load.
4. The pure electric vehicle DCDC wake-up method according to claim 3, further comprising:
and step S5, when the DCDC high voltage does not meet the working requirement of the DCDC converter, reporting the DCDC high voltage fault, and continuously detecting the whole vehicle high voltage until the working requirement of the DCDC converter is met, and then executing step S4.
5. The pure electric vehicle DCDC awakening method according to claim 3, wherein, in step S1, when high voltage is applied to the whole vehicle, the whole vehicle controller sends a CAN awakening message and an EN enabling high level signal, and the method specifically comprises:
and when the whole vehicle keyon is in high voltage, the whole vehicle controller sends a CAN awakening message and an EN enabling high-level signal to the CAN bus through the CAN communication chip.
6. The DCDC wake-up method for the pure electric vehicle according to claim 3, wherein the step S2 of determining whether to wake up the DCDC converter according to whether the DCDC converter receives the CAN wake-up message and/or the EN enable high level signal specifically includes:
step S21, if the CAN communication chip receives a CAN awakening work message sent by the vehicle controller and the DCDC converter detects an EN enabling high level signal, awakening the DCDC converter and jumping to the step S4;
step S22, if the CAN communication chip receives a CAN awakening work message sent by the vehicle controller and the DCDC converter does not detect an EN enabling high level signal, the DCDC converter keeps an awakening state, reports an EN high level signal abnormal fault to a vehicle CAN bus through the CAN communication chip, and jumps to step S3;
and step S23, if the DCDC converter detects an EN enabling high level signal and the CAN communication chip does not receive a wake-up working message sent by the whole vehicle controller, the DCDC converter reports a CAN communication abnormal fault to the whole vehicle CAN bus through the CAN communication chip and skips to step S4.
7. A pure electric vehicle DCDC awakening method according to claim 5 or 6, wherein the CAN communication chip is arranged in a hardware circuit of the DCDC converter.
8. The DCDC wake-up method for the blade electric vehicle of claim 6, wherein in steps S21-S23, an EN enable high signal is detected by a hardware circuit of the DCDC converter.
9. The pure electric vehicle DCDC awakening method according to claim 6, wherein in said step S22, a system side single chip microcomputer of the DCDC converter is used to report an EN high level signal abnormal fault to a vehicle CAN bus through a CAN communication chip; in the step S23, a system-side single chip of the DCDC converter is used to report a CAN communication abnormal fault to the entire vehicle CAN bus through the CAN communication chip.
10. The pure electric vehicle DCDC awakening method according to claim 3, wherein the step S4 of detecting whether the DCDC high voltage meets the operating requirement of the DCDC converter specifically includes:
and detecting the high-voltage bus voltage of the DCDC converter through a high-voltage direct-current side single chip microcomputer of the DCDC converter, feeding the detection result back to a system side single chip microcomputer of the DCDC converter, and judging whether the high-voltage bus voltage of the DCDC converter meets the working requirement of the DCDC converter or not according to the detection result by the system side single chip microcomputer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113799610A (en) * | 2021-09-06 | 2021-12-17 | 华人运通(江苏)技术有限公司 | Vehicle redundancy control method and device and vehicle |
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