CN104467395A - Hot-plug power source system and power source control device and method - Google Patents
Hot-plug power source system and power source control device and method Download PDFInfo
- Publication number
- CN104467395A CN104467395A CN201410843131.6A CN201410843131A CN104467395A CN 104467395 A CN104467395 A CN 104467395A CN 201410843131 A CN201410843131 A CN 201410843131A CN 104467395 A CN104467395 A CN 104467395A
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- switch
- control unit
- power supply
- voltage
- power
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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
- H02M1/36—Means for starting or stopping converters
-
- 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
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides a hot-plug power source system and a power source control device and method. The power source control device comprises a control unit and a switch. The first end of the switch is connected with a power source, the second end of the switch is connected with electric equipment, and the third end of the switch is connected with the control unit. The control unit is connected with the power source and used for detecting the voltage between the first end and the second end of the switch and judging whether the voltage between the first end and the second end of the switch is smaller than or equal to a first preset value or not, if the judgment result is that the voltage between the first end and the second end of the switch is smaller than or equal to the first preset value, the switch is turned on, a first control signal is sent to the power source, and soft start of the power source is triggered to output the preset voltage; if the judgment result is that the voltage between the first end and the second end of the switch is larger than the first preset value, a second control signal is sent to the power source, the power source is triggered to output the preset voltage, and until it is detected that the voltage between the first end and the second end of the switch is smaller than or equal to a second preset value, the switch is turned on. According to the hot-plug power source system and the power source control device and method, electromagnetic interference can be reduced.
Description
Technical field
The present invention relates to electronic technology field, particularly hot connecting and disconnecting origin system, power control and method.
Background technology
Along with the increase of the power of power consumption equipment, need by multiple power supply jointly for power consumption equipment is powered.This power supply is generally hot plug power supply, and multiple hot plug power supply combines as power consumption equipment is powered.
In prior art, hot plug power supply is inserted into after on power consumption equipment, and power consumption equipment is to power supply enable signal, and power supply receives enable signal just directly to start to power to power consumption equipment.In the moment that power supply and power consumption equipment are connected, may there is larger voltage difference between power supply and power consumption equipment, and then produce very large surge current, surge current can bring electromagnetic interference to power consumption equipment.In addition, when other power supplys existing in power consumption equipment are powered for it, the electric current that the power supply of just access exports instantaneously in access is different from the electric current that existing power supply exports, or the output voltage of the two is different, supply current in the short time can be made to occur larger change, produce larger electromagnetic interference.
Summary of the invention
The invention provides hot connecting and disconnecting origin system, power control and method, can electromagnetic interference be reduced.
First aspect, the invention provides a kind of power control, comprising: control unit, switch;
The first end of described switch is connected with power supply, and the second end of described switch is connected with power consumption equipment, and the 3rd end of described switch is connected with described control unit;
Described control unit, also be connected with described power supply, for detecting the voltage between the first end of described switch and the second end, judge whether the voltage between the first end of described switch and the second end is less than or equal to the first preset value, when judged result is for being, open described switch, the first control signal is sent to described power supply, trigger described soft startup of electric power and export the voltage preset, when judged result is no, the second control signal is sent to described power supply, trigger described power supply and export described default voltage, until when the voltage detected between the first end of described switch and the second end is less than or equal to the second preset value, open described switch.
Further, described control unit, also for send when receiving described power failure fault-signal time, disconnect described switch.
Further, described switch comprises: two enhancement mode N-channel MOS pipes;
The S pole of the first metal-oxide-semiconductor is connected with described power supply, and the G pole of described first metal-oxide-semiconductor is connected with described control unit, and the D pole of described first metal-oxide-semiconductor is extremely connected with the D of the second metal-oxide-semiconductor;
The S pole of described second metal-oxide-semiconductor is connected with described power consumption equipment, and the G pole of described second metal-oxide-semiconductor is connected with described control unit.
Further, described control unit comprises: drive circuit, and described drive circuit is for driving described first metal-oxide-semiconductor and described second metal-oxide-semiconductor.
Second aspect, the invention provides a kind of power control method, is connected by the first end of switch with power supply, second end of described switch is connected with power consumption equipment, 3rd end of described switch is connected with control unit, described control unit is connected with described power supply, also comprises:
S1: described control unit detects the voltage between the first end of described switch and the second end;
S2: described control unit judges whether the voltage between the first end of described switch and the second end is less than or equal to the first preset value, if so, performs step S3, otherwise performs step S4;
S3: described control unit opens described switch, sends the first control signal to described power supply, triggers described soft startup of electric power and exports the voltage preset;
S4: described control unit sends the second control signal to described power supply, triggers described power supply and exports described default voltage, until when the voltage detected between the first end of described switch and the second end is less than or equal to the second preset value, open described switch.
Further, also comprise: during the fault-signal sent when described control unit receives described power failure, disconnect described switch.
Further, described first preset value is equal with described second preset value.
The third aspect, the invention provides a kind of hot connecting and disconnecting origin system, comprising: power supply and as arbitrary in first aspect as described in power control;
Described power supply, is connected with the first end of the switch in described power control, and is connected with the control unit in described power control, under the control of described control unit, export default voltage.
Hot connecting and disconnecting origin system provided by the invention, power control and method, voltage between the first end of control unit detection switch and the second end, if the control unit voltage detected between the first end of switch and the second end is less than or equal to the first preset value, ensure that the voltage of power consumption equipment is less, then, control unit opening switch, triggering voltage soft start, power supply is powered to power consumption equipment, in the process of soft startup of electric power, the voltage that power supply exports rises to default voltage gradually, power supply is powered on to power consumption equipment from less voltage, avoid between power consumption equipment and power supply and produce larger voltage difference instantaneously, reduce electromagnetic interference, if the control unit voltage detected between the first end of switch and the second end is greater than the first preset value, control power supply and export the voltage preset, until when the voltage detecting between the first end of switch and the second end is less than or equal to the second preset value, ensure that the voltage difference between power supply and power consumption equipment is less, then, opening switch, makes power supply power to power consumption equipment, avoid between power consumption equipment and power supply and produce larger voltage difference instantaneously, reduce electromagnetic interference.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of power control that one embodiment of the invention provides;
Fig. 2 is the structural representation of a kind of switch that one embodiment of the invention provides;
Fig. 3 is the flow chart of a kind of power control method that one embodiment of the invention provides;
Fig. 4 is the structural representation of a kind of hot connecting and disconnecting origin system that one embodiment of the invention provides.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly; below in conjunction with the accompanying drawing in the embodiment of the present invention; technical scheme in the embodiment of the present invention is clearly and completely described; obviously; described embodiment is the present invention's part embodiment, instead of whole embodiments, based on the embodiment in the present invention; the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
Embodiments provide a kind of power control, see Fig. 1, this device comprises: control unit 101, switch 102;
The first end of described switch 102 is connected with power supply, and the second end of described switch 102 is connected with power consumption equipment, and the 3rd end of described switch 102 is connected with described control unit 101;
Described control unit 101, also be connected with described power supply, for detecting the voltage between the first end of described switch 102 and the second end, judge whether the voltage between the first end of described switch and the second end is less than or equal to the first preset value, when judged result is for being, open described switch, the first control signal is sent to described power supply, trigger described soft startup of electric power and export the voltage preset, when judged result is no, the second control signal is sent to described power supply, trigger described power supply and export described default voltage, until when the voltage difference detected between the first end of described switch and the second end is less than or equal to the second preset value, open described switch.
A kind of power control that the present embodiment provides, voltage between the first end of control unit 101 detection switch 102 and the second end, if control unit 101 voltage detected between the first end of switch and the second end is less than or equal to the first preset value, ensure that the voltage of power consumption equipment is less, then, control unit 101 opening switch, triggering voltage soft start, power supply is powered to power consumption equipment, in the process of soft startup of electric power, the voltage that power supply exports rises to default voltage gradually, power supply is powered on to power consumption equipment from less voltage, avoid between power consumption equipment and power supply and produce larger voltage difference instantaneously, reduce electromagnetic interference, if control unit 101 voltage detected between the first end of switch and the second end is greater than the first preset value, control power supply and export the voltage preset, until when the voltage detecting between the first end of switch 102 and the second end is less than or equal to the second preset value, ensure that the voltage difference between power supply and power consumption equipment is less, then, opening switch 102, makes power supply power to power consumption equipment, avoid between power consumption equipment and power supply and produce larger voltage difference instantaneously, reduce electromagnetic interference.
When there is the faults such as overcurrent, overvoltage, excess temperature when power supply, in order to avoid power failure brings impact to power consumption equipment, in a kind of possible implementation, described control unit 101, also for send when receiving described power failure fault-signal time, disconnect described switch 102.After power detecting goes out faults itself, send fault-signal to control unit 101, control unit 101 receives cut-off switch after this fault-signal, stops power supply powering to power consumption equipment, avoids power failure and bring infringement to power consumption equipment.
In a kind of possible implementation, the switch of the present embodiment can adopt metal-oxide-semiconductor switch, and see Fig. 2, described switch 102 comprises: two enhancement mode N-channel MOS pipes;
The S pole of the first metal-oxide-semiconductor 201 is connected with described power supply, and the G pole of described first metal-oxide-semiconductor 201 is connected with described control unit, and the D pole of described first metal-oxide-semiconductor 201 is extremely connected with the D of the second metal-oxide-semiconductor 202;
The S pole of described second metal-oxide-semiconductor 202 is connected with described power consumption equipment, and the G pole of described second metal-oxide-semiconductor 202 is connected with described control unit.
Control unit is by applying conducting and the cut-off that voltage signal controls the first metal-oxide-semiconductor 201, second metal-oxide-semiconductor 202 to the G pole of the G pole of the first metal-oxide-semiconductor 201, the second metal-oxide-semiconductor 202.
When switch is the switch in this implementation, in a control unit, can drive circuit be set, drives the metal-oxide-semiconductor in this switch by this drive circuit.
Described control unit comprises: drive circuit, and described drive circuit is for driving described first metal-oxide-semiconductor 201 and described second metal-oxide-semiconductor 202.
The embodiment of the present invention additionally provides a kind of power control method, and see Fig. 3, the method comprises:
S0: be connected with power supply by the first end of switch, is connected the second end of described switch with power consumption equipment, is connected by the 3rd end of described switch, is connected by described control unit with described power supply with control unit;
S1: described control unit detects the voltage between the first end of described switch and the second end;
S2: described control unit judges whether the voltage between the first end of described switch and the second end is less than or equal to the first preset value, if so, performs step S3, otherwise performs step S4;
S3: described control unit opens described switch, sends the first control signal to described power supply, triggers described soft startup of electric power and exports the voltage preset;
S4: described control unit sends the second control signal to described power supply, triggers described power supply and exports described default voltage, until when the voltage detected between the first end of described switch and the second end is less than or equal to the second preset value, open described switch.
When there is the faults such as overcurrent, overvoltage, excess temperature when power supply, in order to avoid power failure brings impact to power consumption equipment, in a kind of possible implementation, the method also comprises: described control unit send when receiving described power failure fault-signal time, disconnect described switch.
In order to reduce the electromagnetic interference that hot plug power supply brings to power consumption equipment when inserting power consumption equipment, embodiments provide a kind of hot connecting and disconnecting origin system, control unit is provided with to control the power supply process of hot plug power supply in hot plug power supply, this hot connecting and disconnecting origin system, comprising: arbitrary described power control in power supply and above-described embodiment;
Described power supply, is connected with the first end of the switch in described power control, and is connected with the control unit in described power control, under the control of described control unit, export default voltage.
See Fig. 4, this hot connecting and disconnecting origin system, specifically comprises: power supply 401, control unit 402, switch 403;
The first end of described switch 403 is connected with power supply 401, and the second end of described switch 403 is connected with power consumption equipment, and the 3rd end of described switch 403 is connected with described control unit 402;
Described control unit 402, also be connected with described power supply 401, for detecting the voltage between the first end of described switch 403 and the second end, judge whether the voltage between the first end of described switch 403 and the second end is less than or equal to the first preset value, when judged result is for being, open described switch 403, the first control signal is sent to described power supply 401, trigger described power supply 401 soft start and export the voltage preset, when judged result is no, the second control signal is sent to described power supply 401, trigger described power supply 401 and export described default voltage, until when the voltage detected between the first end of described switch 403 and the second end is less than or equal to the second preset value, open described switch 403.
Described power supply 401, is connected with the first end of the switch 403 in described power control, and is connected with the control unit 402 in described power control, under the control of described control unit 402, export default voltage.
Described power supply 401, specifically for after receiving described first control signal that described control unit 402 sends, soft start also exports the voltage preset, and after receiving described second control signal that described control unit 402 sends, exports described default voltage.
When there is the faults such as overcurrent, overvoltage, excess temperature when power supply, in order to avoid power failure brings impact to power consumption equipment, in a kind of possible implementation, described power supply 401, for detecting the state of this power supply, when detecting this power failure, send fault-signal to described control unit 402;
Described control unit 402, also for when receiving the described fault-signal that described power supply 401 is sent, disconnects described switch 403.
In a kind of possible implementation, described switch 403 comprises: two enhancement mode N-channel MOS pipes;
The S pole of the first metal-oxide-semiconductor is connected with described power supply, and the G pole of described first metal-oxide-semiconductor is connected with described control unit, and the D pole of described first metal-oxide-semiconductor is extremely connected with the D of the second metal-oxide-semiconductor;
The S pole of described second metal-oxide-semiconductor is connected with described power consumption equipment, and the G pole of described second metal-oxide-semiconductor is connected with described control unit.
When switch is the switch in this implementation, described control unit comprises: drive circuit, and described drive circuit is for driving described first metal-oxide-semiconductor and described second metal-oxide-semiconductor.
The hot connecting and disconnecting origin system that the present embodiment provides in use, is connected with power consumption equipment by the second end of switch, and after being connected with power consumption equipment, power consumption equipment can send enable signal to hot plug power-supply system, triggers hot connecting and disconnecting origin system and carries out work.Voltage between the first end and the second end of switch 403 is less than or equal to the first preset value, illustrate that this hot connecting and disconnecting origin system is first power supply of powering for power consumption equipment, or, illustrate that this hot connecting and disconnecting origin system is current first in good condition power supply of powering for power consumption equipment, the current voltage of power consumption equipment is less, can by soft startup of electric power directly for power consumption equipment is powered.
It should be noted that: in the various embodiments described above, also comprise in control unit: ADC (Analog toDigital Converter, analog to digital converter), is converted to digital signal by analog signal.By this ADC control unit can voltage between the first end of detection switch and the second end time, convert voltage analog signal to digital signal.The first above-mentioned preset value, the second preset value can be identical, and the first above-mentioned preset value, the second preset value all can be set to 0.The above-mentioned voltage preset can voltage required for power consumption equipment.
Hot connecting and disconnecting origin system, power control and method that the embodiment of the present invention provides, have following beneficial effect:
1, the hot connecting and disconnecting origin system that the embodiment of the present invention provides, power control and method, voltage between the first end of control unit detection switch and the second end, if the control unit voltage detected between the first end of switch and the second end is less than or equal to the first preset value, ensure that the voltage of power consumption equipment is less, then, control unit opening switch, triggering voltage soft start, power supply is powered to power consumption equipment, in the process of soft startup of electric power, the voltage that power supply exports rises to default voltage gradually, power supply is powered on to power consumption equipment from less voltage, avoid between power consumption equipment and power supply and produce larger voltage difference instantaneously, reduce electromagnetic interference, if the control unit voltage detected between the first end of switch and the second end is greater than the first preset value, control power supply and export the voltage preset, until when the voltage detecting between the first end of switch and the second end is less than or equal to the second preset value, ensure that the voltage difference between power supply and power consumption equipment is less, then, opening switch, makes power supply power to power consumption equipment, avoid between power consumption equipment and power supply and produce larger voltage difference instantaneously, reduce electromagnetic interference.
2, the hot connecting and disconnecting origin system, power control and the method that provide of the embodiment of the present invention, power supply and switch is controlled by control unit, when ensureing that voltage between the first end and the second end of switch is less, power supply is just allowed to be that power consumption equipment is powered, avoid power supply to produce surge current instantaneously, reduce noise jamming and electromagnetic interference.
The content such as information interaction, implementation between each unit in the said equipment, due to the inventive method embodiment based on same design, particular content can see in the inventive method embodiment describe, repeat no more herein.
It should be noted that, in this article, the relational terms of such as first and second and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element " being comprised " limited by statement, and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical factor.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in the storage medium of embodied on computer readable, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium in.
Finally it should be noted that: the foregoing is only preferred embodiment of the present invention, only for illustration of technical scheme of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (8)
1. a power control, is characterized in that, comprising: control unit, switch;
The first end of described switch is connected with power supply, and the second end of described switch is connected with power consumption equipment, and the 3rd end of described switch is connected with described control unit;
Described control unit, also be connected with described power supply, for detecting the voltage between the first end of described switch and the second end, judge whether the voltage between the first end of described switch and the second end is less than or equal to the first preset value, when judged result is for being, open described switch, the first control signal is sent to described power supply, trigger described soft startup of electric power and export the voltage preset, when judged result is no, the second control signal is sent to described power supply, trigger described power supply and export described default voltage, until when the voltage detected between the first end of described switch and the second end is less than or equal to the second preset value, open described switch.
2. device according to claim 1, is characterized in that, described control unit, also for send when receiving described power failure fault-signal time, disconnect described switch.
3. device according to claim 1 and 2, is characterized in that, described switch comprises: two enhancement mode N-channel MOS pipes;
The S pole of the first metal-oxide-semiconductor is connected with described power supply, and the G pole of described first metal-oxide-semiconductor is connected with described control unit, and the D pole of described first metal-oxide-semiconductor is extremely connected with the D of the second metal-oxide-semiconductor;
The S pole of described second metal-oxide-semiconductor is connected with described power consumption equipment, and the G pole of described second metal-oxide-semiconductor is connected with described control unit.
4. device according to claim 3, is characterized in that, described control unit comprises: drive circuit, and described drive circuit is for driving described first metal-oxide-semiconductor and described second metal-oxide-semiconductor.
5. a power control method, is characterized in that, is connected by the first end of switch with power supply, is connected by the second end of described switch with power consumption equipment, is connected by the 3rd end of described switch, is connected by described control unit, also comprises with described power supply with control unit:
S1: described control unit detects the voltage between the first end of described switch and the second end;
S2: described control unit judges whether the voltage between the first end of described switch and the second end is less than or equal to the first preset value, if so, performs step S3, otherwise performs step S4;
S3: described control unit opens described switch, sends the first control signal to described power supply, triggers described soft startup of electric power and exports the voltage preset;
S4: described control unit sends the second control signal to described power supply, triggers described power supply and exports described default voltage, until when the voltage detected between the first end of described switch and the second end is less than or equal to the second preset value, open described switch.
6. method according to claim 5, is characterized in that, also comprises: during the fault-signal sent when described control unit receives described power failure, disconnects described switch.
7. the method according to claim 5 or 6, is characterized in that, described first preset value is equal with described second preset value.
8. a hot connecting and disconnecting origin system, is characterized in that, comprising: power supply and as the power control as described in arbitrary in Claims 1-4;
Described power supply, is connected with the first end of the switch in described power control, and is connected with the control unit in described power control, under the control of described control unit, export default voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410843131.6A CN104467395A (en) | 2014-12-30 | 2014-12-30 | Hot-plug power source system and power source control device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410843131.6A CN104467395A (en) | 2014-12-30 | 2014-12-30 | Hot-plug power source system and power source control device and method |
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| CN104467395A true CN104467395A (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410843131.6A Pending CN104467395A (en) | 2014-12-30 | 2014-12-30 | Hot-plug power source system and power source control device and method |
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| CN105958628A (en) * | 2016-05-16 | 2016-09-21 | 浪潮电子信息产业股份有限公司 | Power supply system and method |
| CN110137927A (en) * | 2019-06-11 | 2019-08-16 | 合肥联宝信息技术有限公司 | The anti-surge circuit and electronic equipment of a kind of electronic equipment |
| CN110504747A (en) * | 2019-08-26 | 2019-11-26 | 南京奥视威电子科技股份有限公司 | A kind of battery pinch plate, power supply unit and method of supplying power to |
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| CN103777554A (en) * | 2014-02-07 | 2014-05-07 | 浪潮(北京)电子信息产业有限公司 | Hot swap protection circuit system |
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| JP2010148262A (en) * | 2008-12-19 | 2010-07-01 | Hitachi Kokusai Electric Inc | Excess current protection circuit |
| CN102156525A (en) * | 2011-03-11 | 2011-08-17 | 福建星网锐捷网络有限公司 | Method, circuit and device for controlling hot plug of power supply |
| CN103777554A (en) * | 2014-02-07 | 2014-05-07 | 浪潮(北京)电子信息产业有限公司 | Hot swap protection circuit system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105958628A (en) * | 2016-05-16 | 2016-09-21 | 浪潮电子信息产业股份有限公司 | Power supply system and method |
| CN110137927A (en) * | 2019-06-11 | 2019-08-16 | 合肥联宝信息技术有限公司 | The anti-surge circuit and electronic equipment of a kind of electronic equipment |
| CN110137927B (en) * | 2019-06-11 | 2021-06-08 | 合肥联宝信息技术有限公司 | Anti-surge circuit of electronic equipment and electronic equipment |
| CN110504747A (en) * | 2019-08-26 | 2019-11-26 | 南京奥视威电子科技股份有限公司 | A kind of battery pinch plate, power supply unit and method of supplying power to |
| CN110504747B (en) * | 2019-08-26 | 2021-08-13 | 南京奥视威电子科技股份有限公司 | Battery buckle plate, power supply device and power supply method |
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