CN113500972B - Self-locking circuit and automobile body controller - Google Patents
Self-locking circuit and automobile body controller Download PDFInfo
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- CN113500972B CN113500972B CN202110701734.2A CN202110701734A CN113500972B CN 113500972 B CN113500972 B CN 113500972B CN 202110701734 A CN202110701734 A CN 202110701734A CN 113500972 B CN113500972 B CN 113500972B
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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
- B60R16/023—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 transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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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
- B60R16/023—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 transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a self-locking circuit, comprising: the first end of the first switching device is connected with the first electric node of the self-locking circuit, the second end of the first switching device is connected with the third end of the self-locking circuit through a first load, the second end of the first switching device is connected with the second electric node of the self-locking circuit, and the third end of the first switching device is connected with the third electric node of the self-locking circuit through a second load and a first current limiting element; the first end of the second switching element is connected with the fourth electrical node of the self-locking circuit through a second current limiting element, the second end of the second switching element is connected with the fifth electrical node of the self-locking circuit and is connected with the third end of the self-locking circuit through a third load, and the third end of the second switching element passes through the sixth electrical node of the self-locking circuit through a fourth load; the third current limiting element is connected between a third electrical node and a fourth electrical node of the self-locking circuit; one end of the voltage stabilizer is connected with the second electric node, and the other end of the voltage stabilizer is connected between the second load and the first current limiting element. The invention also discloses a vehicle body controller with the self-locking circuit. The vehicle body controller can still keep the output of the driving current when the BCM enters the dormant state, and has better power-saving effect.
Description
Technical Field
The invention relates to the field of automotive electronics, in particular to a self-locking circuit. The invention also relates to a vehicle body controller with the self-locking circuit.
Background
And a Body controller (BCM-Body Control Module) drives the external load to work by enabling the output port to be in a high level or a low level. When the vehicle body controller does not need to work normally or has no control command, the BCM enters a dormant state. The aim is to reduce BCM power consumption, save the power consumption of the whole vehicle and prevent electricity shortage.
The position lamp is generally a load driven by a BCM in the whole vehicle structure, and according to the related requirements of vehicle lamp regulations, when the position lamp is turned on as a parking lamp function, the position lamp needs to be kept on and cannot be automatically turned off. Therefore, when the BCM is lightened at the position lamp, the Micro Control Unit (MCU-Micro Control Unit) needs to enable output continuously, so that the BCM cannot enter a dormant state, and the whole vehicle is in a normal power consumption state for a long time, and power shortage is easy to occur.
For this problem, the current BCM power saving measure is generally designed on the basis of software strategy, such as: under the condition that the position lamp is lightened, the software configured BCM can enter a network sleep state, other Electronic Control Units (ECU) on the whole vehicle are in a sleep state at the moment, and the power consumption of the whole vehicle is only the power consumption of the BCM and the lamp load; or monitoring the voltage of the KL30 (positive electrode of the storage battery), and forcibly turning off the output when the voltage of the KL30 is lower than a threshold value. The existing scheme can achieve the effect of power saving, but the power saving is incomplete, and the following defects mainly exist:
1) The BCM still cannot enter the sleep state and cannot achieve the lowest power consumption.
2) Forced shutdown or other triggered shutdown processes may violate user operational intent, affecting the user experience.
3) Except the power consumption of the lamp, other power consumptions belong to additional consumptions which should not exist, and electricity saving is not facilitated.
Disclosure of Invention
In the summary section a series of simplified form concepts are introduced, which are all simplifications of the prior art in this field, which will be further detailed in the detailed description section. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
The invention aims to provide a novel self-locking circuit.
Another technical problem to be solved by the present invention is to provide a vehicle body controller capable of maintaining the driving current output when the BCM enters a sleep state.
In order to solve the above technical problem, the present invention provides a self-locking circuit, including:
a first switch device Q1, a first end C1 of which is connected to the first electrical node En1 of the self-locking circuit, a second end E1 of which is connected to a third end B1 of the self-locking circuit through a first load R1, a second end E1 of which is connected to the second electrical node En2 of the self-locking circuit, and a third end B1 of which is connected to the third electrical node En3 of the self-locking circuit through a second load R2 and a first current limiting device R3;
a first end C2 of the second switching device Q2 is connected to the fourth electrical node En4 of the self-locking circuit through a second current limiting device R4, a second end E2 thereof is connected to the fifth electrical node En5 of the self-locking circuit and is connected to a third end B2 thereof through a third load R5, and the third end B2 thereof passes through a fourth load R6 and is connected to a sixth electrical node En6 of the self-locking circuit;
a third current limiting element R7 connected between the latching circuit third electrical node En3 and the fourth electrical node En 4;
the regulator C1 has one end connected to the second electrical node En2 and the other end connected between the second load R2 and the first current limiter R3.
Optionally, the self-locking circuit is further modified, and the first switching device Q1 and the second switching device Q2 are triodes, and have a collector at a first end, an emitter at a second end, and a base at a third end.
Optionally, the self-locking circuit is further modified, and the first load R1, the second load R2, the third load R5 and the fourth load R6 are resistors.
Optionally, the self-locking circuit is further modified, and the first current limiting element R3, the second current limiting element R4 and the third current limiting element R7 are resistors.
Optionally, the self-locking circuit is further improved, and the voltage stabilizing part C1 is a capacitor.
Optionally, the self-locking circuit is further improved, in operation, the first electrical node En1 is connected to the sixth electrical node En6, the second electrical node En2 is grounded, the third electrical node En3 is connected to the enable port of the signal source, the fourth electrical node En4 is connected to the input port of the driver chip, and the fifth electrical node En5 is connected to the first power source.
In order to solve the above technical problem, the present invention provides a vehicle body controller having any one of the above self-locking circuits, wherein the MCU serves as a signal source, and the high side driver chip HSD serves as a driver chip.
Optionally, the vehicle body controller is further improved, when the MCU outputs a high level, the high side driver chip HSD outputs a driving current;
when the MCU outputs a high-resistance state, the high-side driving chip HSD still outputs a driving current.
Optionally, the vehicle body controller is further improved, and the high-side driving chip HSD outputs a driving current for driving a vehicle position lamp.
The vehicle body controller provided by the invention can be used for any vehicle-mounted electronic component which has a power saving requirement and still needs to keep a driving current when the BCM enters a dormant state, and the working principle of the vehicle body controller is described by taking a vehicle body position lamp as an example:
under the working condition I, the BCM works normally, and the position lamp is lightened;
a. the MCU enables the output port OUT _ OPH _ side light to be at a high level (5V) according to the input signal and the processing logic, and at this time, a high level (5V) is set between the second load R2 and the first current limiting element R3 of the latch circuit, which is named as point a for convenience of description;
b. because the point a is at a high level (5V), the second electrical node En2 of the self-locking circuit is connected to a low level (0V), and the first triode Q1 is turned on, the first electrical node En1 and the sixth electrical node En6 are both at a low level (0V); since the fifth electrical node En5 is connected to the power supply and is at a high level (5V), the second transistor Q2 is turned on, and a high level (5V) is provided between the collector of the second transistor Q2 and the second current limiter R4, which is designated as point B for convenience of description;
c. since the output ports OUT _ OPH _ side light and B of the MCU are both at high level (5V), the current can drive the position lamp output to light after passing through the high side driver chip HSD.
Under the working condition II, the BCM is dormant, and the BCM can enter the dormancy after meeting the dormancy condition under the condition that the position lamp is kept in the lighting state;
a. before the BCM is in a sleep state, the output port OUT _ OPH _ SideLight of the MCU is configured to be in a high impedance state, and at the moment, the OUT _ OPH _ SideLight is invalid input to the self-locking circuit;
b. since the point B is at a high level (5V) at the last time, after the BCM enters a sleep state, the current of the point B passes through the first current limiting element R3, the second current limiting element R4 and the third current limiting element R7 of the resistor, so that the point a is at a high level (5V);
c. similarly, in the step B, the point B keeps high level (5V) continuously to form self-locking logic; therefore, the current can still drive the position lamp to output after passing through the high-side driving chip HSD, and keeps lighting.
The invention can at least realize the following technical effects:
1. and the power saving effect is improved. The BCM can enter a dormant state, so that the power consumption of the whole vehicle is mainly the power consumption of a lamp, and no other additional power consumption exists; compared with the prior art that the BCM enters the network dormancy, the power consumption of the whole vehicle is mainly the BCM and the lamp power consumption. The technology of the invention can minimize the power consumption of the whole vehicle and optimize the power-saving effect.
2. And optimizing the power saving performance. In order to save power, the invention uses hardware circuit to realize the function of keeping the drive output. The invention can be applied to the BCM sleep state and can realize output maintenance when the MCU is abnormal. If the output port is changed into a high impedance state due to the abnormal condition of the MCU, the driving output can still be continued at the moment. Therefore, compared with the power-saving scheme based on the software design in the prior art, the invention can improve the output stability and the power-saving performance.
3. The invention has wider application range and can save the software design cost. Because the technical scheme is a hardware design scheme, the coupling with software design is low, the vehicle-mounted electronic component can be reused in practical application, and the effect is stable.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification. The drawings are not necessarily to scale, however, and may not be intended to accurately reflect the precise structural or performance characteristics of any given embodiment, and should not be construed as limiting or restricting the scope of values or properties encompassed by exemplary embodiments in accordance with the invention. The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
FIG. 1 is a schematic diagram of a self-locking circuit structure according to the present invention.
Fig. 2 is a partial structural schematic diagram of the vehicle body controller of the present invention.
Description of the reference numerals
First switching device Q1
First end C1
Second end E1
Third terminal B1
Second switching device Q2
First end C2
Second end E2
Third terminal B3
First load R1
Second load R2
Third load R5
First current limiter R3
Second current limiter R4
Third current limiter R7
Self-locking circuit first electrical node En1
Second electrical node En2 of latching circuit
Third electrical node En3 of latching circuit
Fourth electrical node En4 of the latch circuit
Fifth electrical node En5 of the latch circuit
Sixth electrical node En6 of self-locking circuit
Stabilizer C1
Point A
And point B.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and technical effects of the present invention will be fully apparent to those skilled in the art from the disclosure in the specification. The invention is capable of other embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the general spirit of the invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. The following exemplary embodiments of the present invention may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the technical solutions of these exemplary embodiments to those skilled in the art.
It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. Like reference numerals refer to like elements throughout the drawings. Further, it will be understood that, although the terms first, second, etc. may be used herein to describe various elements, parameters, components, regions, layers and/or sections, these elements, parameters, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, parameter, component, region, layer or section from another element, parameter, component, region, layer or section. Thus, a first element, parameter, component, region, layer or section discussed below could be termed a second element, parameter, component, region, layer or section without departing from the teachings of exemplary embodiments according to the present invention.
A first embodiment;
the invention provides a self-locking circuit, comprising:
a first switching device Q1, a first end C1 of which is connected to the first electrical node En1 of the self-locking circuit, a second end E1 of which is connected to a third end B1 of the self-locking circuit through a first load R1, a second end E1 of which is connected to the second electrical node En2 of the self-locking circuit, and a third end B1 of which is connected to the third electrical node En3 of the self-locking circuit through a second load R2 and a first current limiting device R3;
a first end C2 of the second switching device Q2 is connected to the fourth electrical node En4 of the self-locking circuit through a second current limiting device R4, a second end E2 thereof is connected to the fifth electrical node En5 of the self-locking circuit and is connected to a third end B2 thereof through a third load R5, and the third end B2 thereof passes through a fourth load R6 and is connected to a sixth electrical node En6 of the self-locking circuit;
a third current limiting element R7 connected between the latching circuit third electrical node En3 and the fourth electrical node En 4;
the regulator C1 has one end connected to the second electrical node En2 and the other end connected between the second load R2 and the first current limiter R3.
A second embodiment;
as shown in fig. 1, the present invention provides a self-locking circuit, including:
a first triode, namely a first switching device Q1, a collector C1 of the first triode is connected with a first electrical node En1 of the self-locking circuit, an emitter E1 of the first triode is connected with a base B1 of the self-locking circuit through a first load R1, the emitter E1 of the first triode is connected with a second electrical node En2 of the self-locking circuit, and the base B1 of the first triode is connected with a third electrical node En3 of the self-locking circuit through a second load R2 and a first current limiting element R3;
a second triode, namely a second switching device Q2, the collector C2 of which is connected with the fourth electrical node En4 of the self-locking circuit through a second current limiting element R4, the emitter E2 of which is connected with the fifth electrical node En5 of the self-locking circuit and is connected with the base B2 of which through a third load R5, and the base B2 of which is connected with the sixth electrical node En6 of the self-locking circuit through a fourth load R6;
a third current limiter R7 connected between the third electrical node En3 and the fourth electrical node En4 of the latch circuit;
the regulator C1 has one end connected to the second electrical node En2 and the other end connected between the second load R2 and the first current limiter R3.
The first load R1, the second load R2, the third load R5, the fourth load R6, the first current limiting element R3, the second current limiting element R4, and the third current limiting element R7 are resistors, and the voltage stabilizing element C1 is a capacitor.
In the first and second embodiments, during operation, the first electrical node En1 is connected to the sixth electrical node En6, the second electrical node En2 is grounded, the third electrical node En3 is connected to the enable port of the signal source, the fourth electrical node En4 is connected to the input port of the driver chip, and the fifth electrical node En5 is connected to the first power supply (+ 5V).
A third embodiment;
referring to fig. 2, the present invention provides a vehicle body controller of the self-locking circuit according to any one of the first or second embodiments, fig. 2 shows a related part of the structure of the present invention, and other structures of the vehicle body controller can be implemented by any existing vehicle body controller, which is not an improvement point of the present invention and is not shown; the MCU is used as a signal source, and the high-side driver chip HSD is used as a driver chip;
when the MCU outputs a high level, the HSD outputs a driving current;
when the MCU outputs a high-resistance state, the high-side driving chip HSD still outputs a driving current.
When the MCU fails, the output is still in a high-impedance state.
Alternatively, the third embodiment is further modified, and the high-side driver chip HSD outputs a driving current for driving the vehicle position light.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. 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.
The present invention has been described in detail with reference to the specific embodiments and examples, but these are not to be construed as limiting the invention. Many variations and modifications may be made by one of ordinary skill in the art without departing from the principles of the present invention, which should also be considered as within the scope of the present invention.
Claims (9)
1. A self-locking circuit, comprising:
a first switching device (Q1), a first end of which is connected with the first electric node (En 1) of the self-locking circuit, a second end (E1) of which is connected with a third end (B1) of the self-locking circuit through a first load (R1), the second end (E1) of which is connected with the second electric node (En 2) of the self-locking circuit, and the third end (B1) of which is connected with the third electric node (En 3) of the self-locking circuit through a second load (R2) and a first current limiting element (R3);
a second switching device (Q2) having a first end (C2) connected to the fourth electrical node (En 4) of the self-locking circuit via a second current limiting device (R4), a second end (E2) connected to the fifth electrical node (En 5) of the self-locking circuit and to a third end (B2) of the self-locking circuit via a third load (R5), and a third end (B2) connected to the sixth electrical node (En 6) of the self-locking circuit via a fourth load (R6);
a third current limiting element (R7) connected between the latching circuit third electrical node (En 3) and a fourth electrical node (En 4);
and a voltage stabilizer (C1) having one end connected to the second electrical node (En 2) and the other end connected between the second load (R2) and the first current limiter (R3).
2. The self-locking circuit of claim 1, wherein: the first switching device (Q1) and the second switching device (Q2) are transistors, the first terminal of which is a collector, the second terminal of which is an emitter, and the third terminal of which is a base.
3. The self-locking circuit of claim 1, wherein: the first load (R1), the second load (R2), the third load (R5) and the fourth load (R6) are resistors.
4. The self-locking circuit of claim 1, wherein: the first current limiter (R3), the second current limiter (R4) and the third current limiter (R7) are resistors.
5. The self-locking circuit of claim 1, wherein: the voltage stabilizer (C1) is a capacitor.
6. The self-locking circuit of claim 1, wherein: when the circuit works, the first electrical node (En 1) is connected with the sixth electrical node (En 6), the second electrical node (En 2) is grounded, the third electrical node (En 3) is connected with the enabling port of the signal source, the fourth electrical node (En 4) is connected with the input port of the driving chip, and the fifth electrical node (En 5) is connected with the first power supply.
7. A vehicle body controller having the self-locking circuit of any one of claims 1 to 6, characterized in that:
the MCU is used as a signal source, and the high-side driving chip HSD is used as a driving chip.
8. The vehicle body controller according to claim 7, wherein:
when the MCU outputs a high level, the high side driving chip HSD outputs a driving current;
when the MCU outputs a high-resistance state, the high-side driving chip HSD still outputs a driving current.
9. The vehicle body controller according to claim 8, wherein: and the high-side driving chip HSD outputs a driving current for driving a vehicle position lamp.
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| CN111976634A (en) * | 2019-05-21 | 2020-11-24 | 现代自动车株式会社 | Apparatus for managing electric power of vehicle and control method thereof |
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| FR2874138A1 (en) * | 2004-08-06 | 2006-02-10 | St Microelectronics Sa | REGULATION OF A CUTTING FEED |
| CN201989734U (en) * | 2011-02-23 | 2011-09-28 | 浙江吉利汽车研究院有限公司 | Low-power consumption car control system |
| CN104467422B (en) * | 2014-12-22 | 2017-04-26 | 英飞特电子（杭州）股份有限公司 | Constant-current Buck converter and constant-current control circuit thereof |
| CN207053651U (en) * | 2017-06-07 | 2018-02-27 | 四川长虹电器股份有限公司 | A kind of circuit and television set for reducing television standby power consumption |
| CN112440775A (en) * | 2019-09-04 | 2021-03-05 | 联合汽车电子有限公司 | Charging awakening system and method of electric automobile |
| CN110829815A (en) * | 2019-10-30 | 2020-02-21 | 东莞市奥海科技股份有限公司 | High-voltage starting circuit for switching power supply and capable of effectively reducing standby power consumption |
| CN110769571A (en) * | 2019-11-12 | 2020-02-07 | 合肥长安汽车有限公司 | Control method for brightness compensation of automobile A lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020191914A1 (en) * | 2019-03-22 | 2020-10-01 | 广东美的制冷设备有限公司 | Drive control circuit and home appliance |
| CN111976634A (en) * | 2019-05-21 | 2020-11-24 | 现代自动车株式会社 | Apparatus for managing electric power of vehicle and control method thereof |
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