CN108963996A - A kind of method and device reducing transient state inrush current - Google Patents
A kind of method and device reducing transient state inrush current Download PDFInfo
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- CN108963996A CN108963996A CN201810819578.8A CN201810819578A CN108963996A CN 108963996 A CN108963996 A CN 108963996A CN 201810819578 A CN201810819578 A CN 201810819578A CN 108963996 A CN108963996 A CN 108963996A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/001—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
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Abstract
This application discloses a kind of method and devices for reducing transient state inrush current, the first power supply is first controlled to be powered on, so that the first power supply can charge to the capacitor in the component of power supply rear end, then, in the first power supply when powering on duration and reaching the first prefixed time interval, control second source is powered on, so that second source charges to the capacitor in component.It can be seen that, second source is not powered on simultaneously with the first power supply, but the first power supply electrifying for a period of time after, second source is just powered on, this allows for generated peak charging current when generated peak charging current will not charge to capacitor with second source when the first power supply charges to capacitor and is overlapped, so that the first power supply and second source generated surge current when powering on, generated surge current when being powered on simultaneously less than the first power supply and second source, namely reduce generated transient state inrush current when the first power supply is powered on second source.
Description
Technical field
This application involves Current Control Technology field, more particularly to a kind of method for reducing transient state inrush current and
Device.
Background technique
Transient state inrush current, refer to power supply connect moment caused by much larger than steady-state current peak point current or
Person's overload current.In the moment that multi-group power is powered on simultaneously, multi-group power can be simultaneously the electricity in the component of power supply rear end
Appearance charge, thus the presence based on charging current and cause power supply that can generate biggish surge current in powered on moment.And
And, it is generally the case that generated surge current is in steady-state current when normal operating conditions much larger than component, therefore,
Generated surge current may be damaged the element in component when power supply electrifying, and if capacitance of PN junction punctures, resistance is blown
Deng, or even a degree of damage will also result in power supply, reduce the service life of component and power supply.
Summary of the invention
The technical problem to be solved in the embodiments of the present application is that provide it is a kind of reduce transient state inrush current method and
Device, to reduce surge current caused by the moment that multi-group power is powered on, thus after protecting power supply and power supply
Element in end member device increases the service life of component and power supply.
In a first aspect, the embodiment of the present application provides a kind of method for reducing transient state inrush current, the method packet
It includes:
It controls the first power supply to be powered on, so that first power supply charges to the capacitor in component；
When the first power supply electrifying duration reaches the first prefixed time interval, control second source is powered on, with
So that the second source charges to the capacitor in the component.
In some possible embodiments, the power up of first power supply and the second source meets the member
The electrifying timing sequence requirement of system where device.
In some possible embodiments, the method also includes:
It measures between first power supply and the second source when being powered on the first prefixed time interval, it is described
The first surge current in component；
After controlling the first power supply electrifying duration and reaching the second prefixed time interval, control second source is powered on, with
So that the second source charges to the capacitor in the component；
It measures between first power supply and the second source when being powered on the second prefixed time interval, it is described
The second surge current in component；
If first surge current is greater than second surge current, first power supply and second electricity are controlled
Second prefixed time interval is divided between the power-on time of source next time.
In some possible embodiments, first power supply and the second source are with direct current to the member
Capacitor in device charges.
In some possible embodiments, the method also includes:
When the second source powers on duration and reaches the first prefixed time interval, control third power supply is powered on, with
So that the third power supply charges to the capacitor in the component.
Second aspect, the embodiment of the present application also provides a kind of device for reducing transient state inrush current, described devices
Include:
First control unit is powered on for controlling the first power supply, so that first power supply is in component
Capacitor charges；
Second control unit, for when the first power supply electrifying duration reaches the first prefixed time interval, control the
Two power supplys are powered on, so that the second source charges to the capacitor in the component.
In some possible embodiments, the power up of first power supply and the second source meets the member
The electrifying timing sequence requirement of system where device.
In some possible embodiments, described device further include:
First measuring unit, for measuring between first power supply and the second source between the first preset time
The first surge current when being powered on, in the component；
Third control unit, for controlling second after controlling the second prefixed time interval that the first power supply is powered on
Power supply is powered on, so that the second source charges to the capacitor in the component；
Second measuring unit, for measure first power supply and the second source with the second prefixed time interval into
The second surge current when row powers on, in the component；
4th control unit controls described the if being greater than second surge current for first surge current
Second prefixed time interval is divided between the power-on time of one power supply and the second source next time.
In some possible embodiments, first power supply and the second source are with direct current to the member
Capacitor in device charges.
In some possible embodiments, described device further include:
5th control unit, for when the second source powers on duration and reaches the first prefixed time interval, control the
Three power supplys are powered on, so that the third power supply charges to the capacitor in the component.
It in the above-mentioned implementation of the embodiment of the present application, is powered on by Time-sharing control multi-group power, to reduce electricity
Transient state inrush current when source is powered on.It is powered on specifically, the first power supply can be controlled first, so that the first electricity
Source can charge to the capacitor in the component of power supply rear end, and then, in the duration that powers on of the first power supply, to reach first default
When time interval, control second source is powered on, so that second source charges to the capacitor in component.As it can be seen that
Second source not be powered on simultaneously with the first power supply, but the first power supply electrifying for a period of time after, second source
It is powered on, this allows for generated maximum current when the first power supply charges to capacitor will not be with second source to capacitor
Generated maximum current is overlapped when being charged, so that the first power supply and second source generated wave when powering on
Electric current is gushed, generated surge current when being powered on simultaneously less than the first power supply and second source, namely reduce the first electricity
Source and second source generated transient state inrush current when being powered on.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations as described in this application
Example, for those of ordinary skill in the art, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of method flow schematic diagram for reducing transient state inrush current in the embodiment of the present application；
Fig. 2 is another method flow schematic diagram for reducing transient state inrush current in the embodiment of the present application；
Fig. 3 is surge current schematic diagram when Time-sharing control power supply is powered on and powered on simultaneously；
Fig. 4 is a kind of apparatus structure schematic diagram for reducing transient state inrush current in the embodiment of the present application.
Specific embodiment
Inventor it has been investigated that, in the scheme that existing multiple groups battery is powered on, usually simultaneously by multiple groups battery
It is powered on, due in powered on moment, every group of battery is that the capacitor in the prototype part of power supply rear end charges, and every group of battery
Generated maximum charging current is superimposed when charging to capacitor, result in multiple groups battery powered on moment can be in member
Generate biggish surge current in device, and it is steady when generated surge current is in normal operating conditions much larger than component
State electric current, therefore, generated surge current may be damaged the element in component when battery powers on, even power supply electricity
Pond, to reduce the service life of component and power supply.
For this purpose, the embodiment of the present application provides a kind of method for reducing transient state inrush current, it is more by Time-sharing control
Group power supply is powered on, to reduce transient state inrush current when power supply is powered on.Specifically, the first electricity can be controlled first
Source is powered on, so that the first power supply can charge to the capacitor in the component of power supply rear end, then, in the first power supply
When powering on duration and reaching the first prefixed time interval, control second source is powered on, so that second source is to component
In capacitor charge.As it can be seen that second source is not powered on simultaneously with the first power supply, but in the first power supply electrifying
After a period of time, second source is just powered on, this allows for generated peak value when the first power supply charges to capacitor and fills
Electric current when will not charge with second source to capacitor generated peak charging current be overlapped so that first
Power supply and second source generated surge current when powering on, are produced when being powered on simultaneously less than the first power supply with second source
Raw surge current, namely reduce generated transient state inrush current when the first power supply is powered on second source.
In order to make the above objects, features, and advantages of the present application more apparent, below in conjunction with attached drawing to this Shen
Please the various non-limiting implementations in embodiment illustrate.Obviously, described embodiment is the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
All other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.
Refering to fig. 1, Fig. 1 shows a kind of flow diagram of method, this method in the embodiment of the present application and specifically can wrap
It includes:
S101: the first power supply of control is powered on, so that the first power supply charges to the capacitor in component.
In the present embodiment, the first power supply and second source are that the component of power supply rear end is powered, also, in control the
It is not to power on the first power supply simultaneously with second source when one power supply and second source are powered on, but control the
One power supply is first powered on.First power supply rapidly charges to the capacitor in component in the moment powered on, the first power supply,
Charging current is formed in component, so that the charging current caused by the first power supply electrifying moment is maximum, as peak value charges
Electric current.
In some possible embodiments, the first power supply and second source be with direct current to the capacitor in component into
Row charging.
S102: when the first power supply electrifying duration reaches the first prefixed time interval, control second source is powered on, with
So that second source charges to the capacitor in component.
In the present embodiment, second source the first power supply electrifying for a period of time after, second source is just powered on, therefore,
There are certain time intervals, as the first prefixed time interval between second source and the power-on time of the first power supply.Second
Power supply is in powered on moment, and second source can also charge to the capacitor in component, so that second source is when powering on
Also corresponding charging current can be generated.In some possible embodiments, it can be through delays time to control such as RC delay circuits
Module controls powering on for the first power supply and second source.
It should be noted that under normal conditions, being charged with being formed to the capacitor in component after the first power supply electrifying
Charging current can be gradually reduced with the increase in charging time, therefore, the electric current meeting after the first power supply electrifying, in component
It is gradually decreased with the increase in charging time until in stable state.In this way, when second source is powered on, the first electricity
Source be capacitor charging for a period of time, then the first power supply to capacitor carry out charging be formed by charging current can less than first electricity
Source powered on moment is formed by peak charging current (namely maximum charging current), at this point, if second source is powered on again, though
Right second source can rapidly for the capacitor in component is charged and there are peak charging currents, but at this time on second source
Peak charging current caused by electric moment can't peak charging current corresponding with the first power supply be overlapped, but with than
First power supply generates, lesser charging current is overlapped, this allows for the first power supply and fills with total caused by second source
Electric current, total charging current caused by the moment powered on simultaneously less than the first power supply and second source, so that second
Power supply carries out powering on generated surge current after for a period of time in the first power supply electrifying again, can be less than the first power supply and the second electricity
Source generated surge current when powering on simultaneously, namely reduce surge caused by the first power supply and second source powered on moment
Electric current.
In practical application, if desired the electronic equipments such as server, memory are powered on, then the first power supply and the second electricity
The electrifying timing sequence requirement of system where source usually also needs to meet component when being powered on.Specifically, on electronic equipment
When being powered on, multiple groups power supply (including the first power supply and second source) is usually required to need in a timing system
Between complete in section to power on, i.e., multiple groups power supply must complete powering on for all power supplys within a certain period of time, for example, system exists
When powering on to start starting, if the power-on time of power supply exceeds preset time range, system may can not be normal
Starting；In addition to this, the electric sequence of multiple groups power supply is also likely to be present requirement, for example, in part electronic apparatus system
During electrifying timing sequence requires, it is desirable that second source cannot power in advance before the first power supply, therefore, and in practical application, every group of power supply
The electric sequence needs of power supply are determined according to the requirement of electrifying timing sequence.
In addition, identified first is pre- when presetting the power-on time interval between the first power supply and second source
If time interval, the first power supply and the second source generated wave when being powered on may not be able to be reduced to the greatest extent
Gush electric current.For example, the first prefixed time interval is longer within certain time, then the first power supply and second source are powering on
When generated surge current would generally be smaller.Meanwhile the system of distinct electronic apparatuses is required when being powered on powers on
Time restriction also can be different, this makes the power-on time interval between the first power supply and second source be also required to carry out adaptability
Adjustment.In some possible embodiments, when can be powered on according to the first power supply every time and second source when powering on
Between be spaced and generated surge current size determines more preferably power-on time interval.
Specifically, when first the first power supply of secondary control and second source are powered on, can control the first power supply with
The first prefixed time interval is divided between power-on time between second source, meanwhile, the first power supply and second source can be measured
When being powered on the first prefixed time interval, the size of the first surge current in component；Then, in the second secondary control
When first power supply and second source are powered on, the second prefixed time interval can be reached controlling the first power supply electrifying duration
Afterwards, control second source is powered on, so that second source charges to the capacitor in component, in this power up
In, default second time interval is divided between the power-on time between the first power supply and second source, meanwhile, the first electricity can be measured
The second surge current size between source and second source when being powered on the second prefixed time interval, in component；It connects
, the first surge current corresponding to the first prefixed time interval when first powering on can be compared, with when powering on for the second time
Corresponding to two prefixed time intervals the and the size between surge current, if the first surge current is greater than the second surge current,
It is then divided between next time or in subsequent power up, controlling the power-on time between the first power supply and second source default
Second time interval, certainly, if the first surge current is less than or equal to the second surge current, next time or candidate
In power up, preset first time interval is divided between the power-on time between the first power supply of control and second source.
It should be noted that being to compare surge current corresponding to two power-on time intervals in above embodiment
Size determines more preferably power-on time interval, in other similar embodiment, is also possible to more power-on times
Interval can determine optimal power-on time from multiple power-on time intervals to measure multiple surge currents and compare
Interval, as the power-on time interval in subsequent power up between the first power supply and second source.
In the present embodiment, powered on by Time-sharing control multi-group power, it is defeated to reduce transient state when power supply is powered on
Enter surge current.It is powered on specifically, the first power supply can be controlled first, so that the first power supply can be to end member device after power supply
Capacitor in part charges, then, in the first power supply when powering on duration and reaching the first prefixed time interval, the second electricity of control
Source is powered on, so that second source charges to the capacitor in component.As it can be seen that second source is not and the first electricity
Source is powered on simultaneously, but the first power supply electrifying for a period of time after, second source is just powered on, this allow for first electricity
Generated maximum when generated maximum current will not charge to capacitor with second source when source charges to capacitor
Electric current is overlapped so that the first power supply and second source generated surge current when powering on, less than the first power supply with
Second source generated surge current when being powered on simultaneously, namely reduce the first power supply and when second source is powered on
Generated transient state inrush current.
The process that the first power supply of Time-sharing control and second source are powered on is described in detail in above-described embodiment, and it is real
Border application in, power supply may not only only have the first power supply and second source, in the following, with the first power supply of Time-sharing control,
For second source and third power supply are powered on, the technical solution of the application is described in detail.Referring to fig. 2, Fig. 2 shows
Having gone out another method flow schematic diagram for reducing transient state inrush current, this method in the embodiment of the present application specifically can wrap
It includes:
S201: the first power supply of control is powered on, so that the first power supply charges to the capacitor in component.
S202: when the first power supply electrifying duration reaches the first prefixed time interval, control second source is powered on, with
So that second source charges to the capacitor in component.
In the present embodiment, step S201 and step S202 and the step S101 in a upper embodiment are similar with step S102,
The related place that can refer to an embodiment is understood that therefore not to repeat here.
S203: when second source powers on duration and reaches the first prefixed time interval, control third power supply is powered on, with
So that third power supply charges to the capacitor in component.
It in the present embodiment, successively controls the first power supply, second source and third power supply and is powered on, also, the first electricity
Power-on time interval between power-on time interval between source and second source and second source and third power supply is consistent,
When powering on duration and reaching default first prefixed time interval of second source, control third power supply are powered on.
Certainly, in practical application, the power-on time interval between second source and third power supply might not be with the first electricity
Power-on time interval holding between source and second source is consistent, to preset time first time, can be according to the actual situation
Needs, the power-on time interval between second source and third power supply is adjusted to other values, that is, the first power supply and second electricity
Power-on time interval between source, can power-on time interval between second source and third power supply it is different.
It should be noted that powered on by the first power supply of Time-sharing control, second source and third power supply, it is produced
Surge current generated surge electricity when will usually be less than the first power supply, second source and third power supply while being powered on
Stream, as shown in Figure 3.Wherein, it is produced when left side is powered on simultaneously by the first power supply, second source and third power supply in Fig. 3
Raw surge current schematic diagram, right side is that the first power supply of Time-sharing control, second source and third power supply carry out simultaneously in Fig. 3
Generated surge current schematic diagram when electric.
Certainly, the upper electric control of the first power supply, second source and third power supply needs to meet system where power supply
Electrifying timing sequence require (electric sequence and total power-on time including power supply etc.).
In the present embodiment, powered on by the first power supply of Time-sharing control, second source and third power supply, so that first
Power supply, second source and third power supply when charging respectively to capacitor generated maximum current will not be overlapped mutually, because
This, generated total charging current, is consistently less than power supply while being produced when powering on during power supply time-sharing power
Raw total charging current, so that the first power supply and second source generated surge current when powering on, less than the first electricity
Source and second source generated surge current when being powered on simultaneously, namely reduce the first power supply and carried out with second source
Generated transient state inrush current when electric.
In addition, the embodiment of the present application also provides a kind of devices for reducing transient state inrush current.Show refering to Fig. 4, Fig. 4
Having gone out a kind of apparatus structure schematic diagram for reducing transient state inrush current, described device 400 in the embodiment of the present application includes:
First control unit 401 is powered on for controlling the first power supply, so that first power supply is in component
Capacitor charge；
Second control unit 402, for controlling when the first power supply electrifying duration reaches the first prefixed time interval
Second source is powered on, so that the second source charges to the capacitor in the component.
In some possible embodiments, the power up of first power supply and the second source meets the member
The electrifying timing sequence requirement of system where device.
In some possible embodiments, described device 200 further include:
First measuring unit, for measuring between first power supply and the second source between the first preset time
The first surge current when being powered on, in the component；
Third control unit, for controlling second after controlling the second prefixed time interval that the first power supply is powered on
Power supply is powered on, so that the second source charges to the capacitor in the component；
Second measuring unit, for measure first power supply and the second source with the second prefixed time interval into
The second surge current when row powers on, in the component；
4th control unit controls described the if being greater than second surge current for first surge current
Second prefixed time interval is divided between the power-on time of one power supply and the second source next time.
In some possible embodiments, first power supply and the second source are with direct current to the member
Capacitor in device charges.
In some possible embodiments, described device 200 further include:
5th control unit, for when the second source powers on duration and reaches the first prefixed time interval, control the
Three power supplys are powered on, so that the third power supply charges to the capacitor in the component.
In the present embodiment, second source is not powered on simultaneously with the first power supply, but in the first power supply electrifying one
After the section time, second source is just powered on, this allows for generated maximum current when the first power supply charges to capacitor
Generated maximum current is overlapped when will not charge with second source to capacitor, so that the first power supply and second
Generated surge current when power supply electrifying, generated surge electricity when being powered on simultaneously less than the first power supply and second source
Stream, namely reduce generated transient state inrush current when the first power supply is powered on second source.
" the first prefixed time interval ", " the first power supply ", " first control unit ", " mentioned in the embodiment of the present application
" first " in the titles such as one control unit 401 " is used only to do name mark, does not represent first sequentially.The rule
It is equally applicable to " second ", " third " etc..
As seen through the above description of the embodiments, those skilled in the art can be understood that above-mentioned implementation
All or part of the steps in example method can add the mode of general hardware platform to realize by software.Based on this understanding,
The technical solution of the application can be embodied in the form of software products, which can store is situated between in storage
In matter, such as read-only memory (English: read-only memory, ROM)/RAM, magnetic disk, CD etc., including some instructions to
So that a computer equipment (can be the network communication equipments such as personal computer, server, or router) executes
Method described in certain parts of each embodiment of the application or embodiment.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device reality
For applying example, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to embodiment of the method
Part explanation.Equipment and system embodiment described above is only schematical, wherein saying as separation unit
Bright module may or may not be physically separated, and the component shown as module can be or can not also
It is physical module, it can it is in one place, or may be distributed over multiple network units.It can be according to actual need
Some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying
Out in the case where creative work, it can understand and implement.
The above is only the illustrative embodiment of the application, is not intended to limit the protection scope of the application.
Claims (10)
1. a kind of method for reducing transient state inrush current, which is characterized in that the described method includes:
It controls the first power supply to be powered on, so that first power supply charges to the capacitor in component；
When the first power supply electrifying duration reaches the first prefixed time interval, control second source is powered on, so that
The second source charges to the capacitor in the component.
2. the method according to claim 1, wherein the power up of first power supply and the second source
The electrifying timing sequence requirement of system where meeting the component.
3. the method according to claim 1, wherein the method also includes:
It measures between first power supply and the second source when being powered on the first prefixed time interval, the member device
The first surge current in part；
After controlling the first power supply electrifying duration and reaching the second prefixed time interval, control second source is powered on, so that
The second source charges to the capacitor in the component；
It measures between first power supply and the second source when being powered on the second prefixed time interval, the member device
The second surge current in part；
If first surge current is greater than second surge current, control under first power supply and the second source
Second prefixed time interval is divided between primary power-on time.
4. the method according to claim 1, wherein first power supply and the second source are with direct current
Electricity charges to the capacitor in the component.
5. the method according to claim 1, wherein the method also includes:
When the second source powers on duration and reaches the first prefixed time interval, control third power supply is powered on, so that
The third power supply charges to the capacitor in the component.
6. a kind of device for reducing transient state inrush current, which is characterized in that described device includes:
First control unit is powered on for controlling the first power supply, so that first power supply is to the capacitor in component
It charges；
Second control unit, for when the first power supply electrifying duration reaches the first prefixed time interval, control second to be electric
Source is powered on, so that the second source charges to the capacitor in the component.
7. device according to claim 6, which is characterized in that the power up of first power supply and the second source
The electrifying timing sequence requirement of system where meeting the component.
8. device according to claim 6, which is characterized in that described device further include:
First measuring unit, for measure between first power supply and the second source with the first prefixed time interval into
The first surge current when row powers on, in the component；
Third control unit, for controlling second source after controlling the second prefixed time interval that the first power supply is powered on
It is powered on, so that the second source charges to the capacitor in the component；
Second measuring unit is carried out for measuring first power supply and the second source with the second prefixed time interval
The second surge current when electric, in the component；
4th control unit controls first electricity if being greater than second surge current for first surge current
Second prefixed time interval is divided between the power-on time of source and the second source next time.
9. device according to claim 6, which is characterized in that first power supply and the second source are with direct current
Electricity charges to the capacitor in the component.
10. device according to claim 6, which is characterized in that described device further include:
5th control unit, for when the second source powers on duration and reaches the first prefixed time interval, control third to be electric
Source is powered on, so that the third power supply charges to the capacitor in the component.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115061789A (en) * | 2022-06-09 | 2022-09-16 | 海光信息技术股份有限公司 | Transient current control method and related device |
| CN116908599A (en) * | 2023-09-12 | 2023-10-20 | 中汽研新能源汽车检验中心(天津)有限公司 | Surge test monitoring system, method, equipment and medium for automobile alternating-current charging port |
| US11837912B2 (en) | 2021-07-02 | 2023-12-05 | Delta Electronics (Shanghai) Co., Ltd. | Switching method and multi-input power system |
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| CN115061789B (en) * | 2022-06-09 | 2024-02-09 | 海光信息技术股份有限公司 | Transient current control method and related device |
| CN116908599A (en) * | 2023-09-12 | 2023-10-20 | 中汽研新能源汽车检验中心(天津)有限公司 | Surge test monitoring system, method, equipment and medium for automobile alternating-current charging port |
| CN116908599B (en) * | 2023-09-12 | 2023-12-01 | 中汽研新能源汽车检验中心(天津)有限公司 | Surge test monitoring system, method, equipment and medium for automobile alternating-current charging port |
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Application publication date: 20181207 |