CN111284424A - Power management method and power management system - Google Patents
Power management method and power management system Download PDFInfo
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- CN111284424A CN111284424A CN201811505509.6A CN201811505509A CN111284424A CN 111284424 A CN111284424 A CN 111284424A CN 201811505509 A CN201811505509 A CN 201811505509A CN 111284424 A CN111284424 A CN 111284424A
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- control unit
- electronic control
- power management
- management method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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Abstract
The invention relates to a power management method for an electronic control unit of a motor vehicle and a corresponding power management system. The electronic control unit has a main power supply and a backup power supply, and the power supply management method is based on an automobile open system architecture, and in the power supply management method, if the electronic control unit is expected to stop working, closing operation is executed and the main power supply is closed; in the shutdown operation, a standby mode can be selected in which the electronic control unit is maintained in a standby state by the standby power supply and wake-up source detection is performed at a certain polling cycle, and the electronic control unit is woken up in the case where the wake-up source is detected.
Description
Technical Field
The invention relates to a power management method and a power management system for an electronic control unit of an automobile.
Background
In the automotive field, some automotive Electronic Control Units (ECUs) have a backup power source (e.g., a capacitor, etc.) in addition to a main power source to ensure that they can still operate normally or in an emergency when an unexpected power loss occurs. For example, an electronic control unit for an airbag is provided with a backup power supply to ensure that the airbag is properly detonated in the event of an accidental power loss due to a crash.
On the other hand, as an open, standardized software architecture, an automobile open system architecture (AUTOSAR) is increasingly applied to the field of software architecture of automobiles.
In the current open system architecture of the automobile, no consideration is made ON the standby power of the electronic control unit in terms of the power management of the electronic control unit, i.e., power ON/power OFF/SLEEP/wake (IG ON/OFF/SLEEP/wake). That is, the feature that the electronic control unit can still operate using the standby power supply when the main power supply is turned off is not considered at all in the power management. Thus, a problem arises in that the electronic control unit cannot be awakened in time when the awakening source is detected or the potential of the backup power supply is not utilized.
Disclosure of Invention
Based on the above prior art, the present invention aims to provide a power management system and a power management method for an electronic control unit, wherein the above-mentioned drawbacks of the prior art can be avoided.
According to the invention, a power management method for an electronic control unit of a vehicle is proposed, the electronic control unit having a main power supply and a backup power supply, the power management method being based on a vehicle open system architecture, in which power management method, if it is desired that the electronic control unit stops working, a shut-down operation is performed and the main power supply is shut down; in the shutdown operation, a standby mode can be selected in which the electronic control unit is maintained in a standby state by the standby power supply and wake-up source detection is performed at a certain polling cycle, and the electronic control unit is woken up in the case where the wake-up source is detected.
Therefore, by providing the standby mode which is maintained by the electronic control unit by using the standby power supply, the power supply management mode in the automobile open system architecture system is optimized, and the power supply management mode is increased. Thus, when the electronic control unit loses the main power supply, the power supply is provided by the backup power supply. The electronic control unit can be ensured to normally operate at least partial functions while the wake-up source is detected, and the electronic control unit can be awakened in time when the effective wake-up source is detected.
According to a preferred embodiment, the polling period is 0.1ms to 100ms, preferably 0.1 to 10ms, more preferably less than or equal to 1 ms. By reasonably setting the polling period for detecting the awakening source, the awakening source can be prevented from being captured due to short occurrence on the one hand and resource waste can be avoided on the other hand in a way of matching with the application condition.
According to a preferred embodiment, in the standby state, at least part of the functions of the electronic control unit are operating normally.
According to a preferred embodiment, other modes can be selected in the closing operation.
According to a preferred embodiment, a SLEEP (SLEEP/HALT) mode can be selected during the shutdown operation; in the sleep mode, a wake-up source is detected in an infinite loop (ENDLOOP), and the electronic control unit is woken up if the wake-up source is detected.
According to a preferred embodiment, characterized in that in said closing operation a SHUTDOWN (SHUTDOWN) mode can be selected; a shutdown mode, in which the ECU cannot be directly restored to the running mode, can be selected in the shutdown operation. Preferably, in the shutdown mode the operating system is shut down and no further wake source detection is performed.
Finally, the invention also relates to a power management system for an electronic control unit of a vehicle, the electronic control unit having a backup power supply, the power management system being based on a vehicle open system architecture, the power management system being designed to perform the power management method according to the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
Fig. 1 shows a block diagram of a power management method in the prior art.
Fig. 2 shows a block diagram of a preferred embodiment of a power management method according to the present invention.
Detailed Description
A power management method according to the present invention will be described below by way of specific embodiments with reference to the accompanying drawings. The exemplary embodiments, however, may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
In the conventional power management method in the open system architecture (automotive) of the vehicle, as shown in fig. 1, after a main power supply switch of an electronic control unit is turned on, a start-up step 1 of the electronic control unit is first performed, in which initialization of the electronic control unit is performed. Then, a wake-up step 2 is performed, in which wake-up step 2 it is detected whether there is a valid wake-up source. If a valid wake-up source is present, the electronic control unit is operated normally or all its functions are operated normally. Whereas if there is no active wake-up source (which means that it is desired that the electronic control unit stops working), a shut-down operation is performed. In this closing operation, a closing preparation step 4 is first performed.
If it is desired to stop the electronic control unit, for example if all active wake-up sources have failed, a shutdown operation is likewise carried out when the electronic control unit is operating or performing a function.
In the shutdown preparation step 4, first, a selection is made between the sleep mode and the shutdown mode. The selection may be made by the ECU vendor based on the characteristics of the ECU. The main power supply is then turned off and power is supplied by the backup power supply.
If the shutdown mode is selected in the shutdown preparation step 4, the electronic control unit is in the shutdown state 6 and the electronic control unit cannot be directly restored to the run mode. Optionally, the operating system is shut down and no longer performs wake source detection. At this time, even if there is a wake-up source, the electronic control unit cannot be directly returned to the normal operation state again. For electronic control units that include a backup power source, the shutdown mode makes the potential of the backup power source completely unavailable and fails to meet the functional characteristics of the electronic control unit itself.
If the sleep mode is selected in the off preparation step 4, the electronic control unit performs the sleep step and is in the sleep state 5. In the sleep state, the main power source is first turned off and the passive power source supplies power. The electronic control unit then detects the wake-up source in an infinite loop. In this manner, other tasks of the operating system are halted and the operating system only performs an operation to detect the wake source. If a wake-up source is detected in the sleep state, the electronic control unit performs the wake-up step 2 described above.
In the sleep mode, the electronic control unit performs wake source detection in an "infinite loop" manner, and therefore, the operating system is always performing the operation of detecting the wake source, so that other tasks cannot be performed because the operating system resources cannot be obtained.
One embodiment of a power management method according to the present invention is shown in fig. 2. The start-up step 1, the wake-up step 2 and the normal operation of the electronic control unit in this embodiment are the same as in the embodiment shown in fig. 1. The difference is mainly in the closing operation. Here, a standby mode (goapacitance) different from the above power-off/sleep mode is proposed. That is, when the shutdown preparation step 4 is performed, the standby mode may be selected and the electronic control unit may be put in the standby state 7. In the standby state 7, the wake-up source is periodically detected in a periodic polling manner. The polling period may be variable or fixed, e.g. 0.1-10ms, preferably 1 ms. If a wake-up source is detected, the electronic control unit performs a wake-up step 2.
Compared with the sleep mode, the standby mode can abandon the infinite loop detection mode because the wake-up source is detected by using the periodic polling mode, thereby avoiding the problem that other tasks cannot be executed because time slices cannot be acquired. In addition, by reasonably specifying the polling period, the problem that the awakening source cannot be captured due to short occurrence can be avoided. And compared with a shutdown mode of completely shutting down the operating system, the standby mode can fully utilize the standby power supply to implement continuous detection of the wake-up source, thereby providing better standby performance.
Other embodiments of the present invention will readily suggest themselves to such skilled persons having the benefit of this disclosure. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (9)
1. A power management method for an electronic control unit of an automobile, the electronic control unit having a main power supply and a backup power supply, the power management method being based on an automobile open system architecture,
in the power management method, if it is desired that the electronic control unit stops operating, a shutdown operation is performed and the main power supply is shut down;
in the shutdown operation, a standby mode can be selected in which the electronic control unit is maintained in a standby state by the standby power supply and wake-up source detection is performed at a certain polling cycle, and the electronic control unit is woken up in the case where the wake-up source is detected.
2. The power management method of claim 1, wherein the polling period is 0.1ms to 100 ms.
3. The method of claim 1, wherein the polling period is less than or equal to 1 ms.
4. The power management method of claim 1, wherein in the standby state, at least a portion of the functions of the electronic control unit are operating normally.
5. The power management method of claim 1, wherein other modes can be selected in the shutdown operation.
6. The power management method according to claim 4, wherein a sleep mode can be selected in the shutdown operation; in the sleep mode, a wake-up source is detected in an infinite loop, and the electronic control unit is woken up in case a wake-up source is detected.
7. The power management method according to claim 4, wherein a shutdown mode in which the electronic control unit cannot be directly restored to the running mode can be selected in the shutdown operation.
8. The power management method of claim 7, wherein in the shutdown mode an operating system is shut down and wake source detection is no longer performed.
9. A power management system for an electronic control unit of an automobile, the electronic control unit having a backup power source, the power management system being based on an automobile open system architecture,
the power management system comprises an electronic control unit state manager capable of performing the power management method according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811505509.6A CN111284424A (en) | 2018-12-10 | 2018-12-10 | Power management method and power management system |
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| CN201811505509.6A CN111284424A (en) | 2018-12-10 | 2018-12-10 | Power management method and power management system |
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| CN111284424A true CN111284424A (en) | 2020-06-16 |
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| CN108227576A (en) * | 2017-12-28 | 2018-06-29 | 北京经纬恒润科技有限公司 | The suspend mode control system and method for a kind of vehicle control device |
| CN108819884A (en) * | 2018-05-30 | 2018-11-16 | 江铃汽车股份有限公司 | A kind of car networking terminal supplying power control method |
| KR20180126307A (en) * | 2017-05-17 | 2018-11-27 | 엘지이노텍 주식회사 | Black box device |
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2018
- 2018-12-10 CN CN201811505509.6A patent/CN111284424A/en active Pending
Patent Citations (11)
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| CN1910073A (en) * | 2004-01-13 | 2007-02-07 | 摩托罗拉公司 | Wake-up circuit |
| JP2015199444A (en) * | 2014-04-09 | 2015-11-12 | 株式会社デンソー | Electronic control device |
| KR20160074199A (en) * | 2014-12-18 | 2016-06-28 | 현대오트론 주식회사 | Electronic control apparatus for supporting emergency mode and operating method thereof |
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