CN103715750B - Power-off circuit, direct-current combination power supply system and power-off control method - Google Patents
Power-off circuit, direct-current combination power supply system and power-off control method Download PDFInfo
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- CN103715750B CN103715750B CN201210377980.8A CN201210377980A CN103715750B CN 103715750 B CN103715750 B CN 103715750B CN 201210377980 A CN201210377980 A CN 201210377980A CN 103715750 B CN103715750 B CN 103715750B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000005611 electricity Effects 0.000 claims description 28
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 description 18
- 238000007599 discharging Methods 0.000 description 9
- 238000004134 energy conservation Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005779 cell damage Effects 0.000 description 1
- 208000037887 cell injury Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
-
- 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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Direct Current Feeding And Distribution (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a power-off circuit, a direct-current combination power supply system and a power-off control method. The power-off circuit comprises a power-off control circuit, a first contactor, a second contactor. The power-off control circuit is used for controlling connection and disconnection of the first contactor and the second contactor; the first contactor is connected between a storage battery and a first bus and a primary load is connected to the first bus, wherein the first contactor is a magnetic latching direct-current contactor; and the second contactor is connected between the first bus and a second bus and a secondary load is connected to the second bus, wherein the second contactor is a normally-closed direct-current contactor. According to the invention, a problem that the power-off circuit does not have the energy saving effect because the power-off contactor needs continuous power supplying or the system power supplying reliability is influenced because the failure mode of the power-off contactor is not determined according to the correlation technique can be solved.
Description
Technical field
The present invention relates to the communications field, in particular to circuit electric under one kind, direct current combined power supply system and under automatically controlled
Method processed.
Background technology
Direct current combined power supply system is typically made up of DC source and accumulator, wherein, DC source by alternating current or its
Its energy conversion supplies electricity to load supplying and charging a battery for stable DC, accumulator as back-up source, in DC source
Powering load when quitting work.Because accumulator over-discharge can cause the damage of accumulator, so direct current integrated drive generator system
System has to design battery overdischarge protection circuit, to ensure that accumulator is not in that overdischarge damages.
The general circuit structure using the lower electricity of classification of battery overdischarge protection of DC power system, current main electricity
Line structure form has two kinds：
The first adopts two normally closed type D.C. contactors, as shown in figure 1, when battery discharging is to certain voltage, directly
Stream catalyst KM2 disconnects, and cuts off the power supply of secondary load, ensures the power supply of important load using the remaining electric energy of accumulator；When
When battery tension continues to drop to final discharging voltage, D.C. contactor KM1 disconnects, the power supply that cut-out all loads, to protect
Shield accumulator will not be damaged because of overdischarge.Benefit using normally closed contactor is direct current in the case of power supply normal work
In the case that catalyst is maintained at attracted position, do not need its control line bag to be powered, with energy saving；Once controlling
Circuit malfunction, catalyst can unanimously be maintained at on-position, does not interfere with the power supply of load；But, need after disconnection using storage
Battery is powered to its control line bag, to be maintained at off-state, so overlong time also results in cell damage, and is unfavorable for saving
Energy.
Second adopts two magnetic freeze mode D.C. contactors, as shown in Fig. 2 when battery discharging is to certain voltage,
D.C. contactor KM2 disconnects, and cuts off the power supply of secondary load, ensures the power supply of important load using the remaining electric energy of accumulator；
When battery tension continues to drop to final discharging voltage, D.C. contactor KM1 disconnects, the power supply that cut-out all loads, with
Protection accumulator will not be damaged because of overdischarge.Benefit using magnetic freeze mode catalyst is no matter catalyst is in adhesive or disconnection
State, do not need its control line bag to be powered to keep its state, so being very beneficial for energy-conservation；But, magnetic is protected
Holding to reclose after catalyst disconnects needs control circuit to apply a direct impulse to its control line bag, once this control circuit
Failure, even if DC source also cannot be powered to secondary load after recovering output.
For at least one above-mentioned problem in correlation technique, effective solution is not yet proposed at present.
Content of the invention
The invention provides a kind of lower electricity circuit, direct current combined power supply system and lower electric control method, at least to solve phase
The problem that in the technology of pass, lower electricity circuit can not be provided simultaneously with battery overdischarge protective energy conservation and ensure system power supply reliability.
According to an aspect of the invention, it is provided a kind of lower electricity circuit, it includes：Lower electric control circuit, for controlling
The disconnection of first contactor and second contactor with connect；Above-mentioned first contactor, connects to accumulator and above-mentioned first bus
Between, important load connects to above-mentioned first bus, and above-mentioned first contactor is magnetic freeze mode D.C. contactor；Above-mentioned second
Catalyst, connects between the first bus and the second bus, secondary load connects to above-mentioned second bus, above-mentioned second contact
Device is normally closed type D.C. contactor.
Preferably, above-mentioned first contactor, in the case of reaching the first preset value in the magnitude of voltage of above-mentioned accumulator,
Control according to above-mentioned lower electric control circuit disconnects；Above-mentioned second contactor, reaches second in the magnitude of voltage of above-mentioned accumulator pre-
If in the case of value, the control according to above-mentioned lower electric control circuit disconnects, and wherein, it is pre- that above-mentioned second preset value is more than above-mentioned first
If value.
According to a further aspect in the invention, there is provided a kind of direct current combined power supply system, it includes：Above-mentioned under any one
Circuit, accumulator, DC source.
Preferably, above-mentioned accumulator is connected by above-mentioned first contactor to the first bus of direct current combined power supply system
On, above-mentioned important load connects to above-mentioned first bus；Above-mentioned secondary load connects to above-mentioned direct current combined power supply system
On second bus, wherein, above-mentioned second bus and above-mentioned first bus are connected by above-mentioned second contactor.
Preferably, above-mentioned DC source connects to above-mentioned first bus.
According to another aspect of the invention, there is provided a kind of lower electric control method, it includes：By above-mentioned lower electric control electricity
Road controls the disconnection of first contactor cutting off the first bus, and wherein, important load connects to above-mentioned first bus, and above-mentioned the
One catalyst is magnetic freeze mode D.C. contactor；Cut off second by the disconnection that lower electric control circuit controls second contactor female
Line, wherein, secondary load connects to above-mentioned second bus, and above-mentioned second contactor is normally closed type D.C. contactor.
Preferably, in the case that the magnitude of voltage of above-mentioned accumulator reaches the first preset value, by above-mentioned lower electric control electricity
Road controls the disconnection of first contactor；In the case that the magnitude of voltage of above-mentioned accumulator reaches the second preset value, under above-mentioned
Electric control circuit controls the disconnection of second contactor, and wherein, above-mentioned second preset value is more than above-mentioned first preset value.
Preferably, above-mentioned accumulator is connected by above-mentioned first contactor to the first bus of direct current combined power supply system
On, above-mentioned important load connects to above-mentioned first bus；Above-mentioned secondary load connects to above-mentioned direct current combined power supply system
On second bus, wherein, above-mentioned first bus and above-mentioned second bus are connected by above-mentioned second contactor.
Preferably, above-mentioned DC source connects to above-mentioned first bus.
In the present invention, control the disconnection of first contactor and second contactor by lower electric control circuit and connect,
This second contactor connects between the first bus and the second bus, and secondary load connects to above-mentioned second bus, when this
When two catalysts disconnect, cut off the power supply to secondary load for the accumulator, above-mentioned first contactor connects to above-mentioned accumulator and upper
State between the first bus, important load connects to above-mentioned first bus, when this first contactor disconnects, cut off accumulator pair
The power supply of important load, to realize electricity under the classification to the important load in accumulator and secondary load, realizes to accumulator
Over, above-mentioned second contactor is normally closed type D.C. contactor, and above-mentioned first contactor is that magnetic freeze mode direct current contacts
Device, in the case of disconnecting first contactor, except cutting off the power supply to important load for the accumulator, can also cut off simultaneously
The power supply to second contactor for the accumulator, can realize the purpose of energy-conservation；Further, since second contactor is normally closed type direct current
Catalyst, even if in the case of control circuit failure, after DC source recovers output it is ensured that can to important load and
Secondary load supplying, thus improve the power supply reliability of system.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the first the direct current combined power supply system according to correlation technique；
Fig. 2 is the structural representation of the second direct current combined power supply system according to correlation technique；
Fig. 3 is the structured flowchart of lower electricity circuit according to embodiments of the present invention；
Fig. 4 is the structural representation of direct current combined power supply system according to embodiments of the present invention；And
Fig. 5 is the flow chart of lower electric control method according to embodiments of the present invention.
Specific embodiment
To describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that not conflicting
In the case of, the embodiment in the application and the feature in embodiment can be mutually combined.
Present embodiments provide electric circuit under one kind, as shown in figure 3, this lower electricity circuit includes：Lower electric control circuit 102,
For controlling the disconnection of first contactor 104 and second contactor 106 and connecting；First contactor 104, connect to accumulator and
Between above-mentioned first bus, important load connects to above-mentioned first bus, and above-mentioned first contactor connects for magnetic freeze mode direct current
Tentaculum；Second contactor 106, connects between the first bus and the second bus, secondary load connects to above-mentioned second bus,
Above-mentioned second contactor is normally closed type D.C. contactor.
In the above-described embodiments, control the disconnection of first contactor and second contactor by lower electric control circuit and connect
Logical, this second contactor connects between the first bus and the second bus, and secondary load connects to above-mentioned second bus, when this
When second contactor disconnects, cut off the power supply to secondary load for the accumulator, above-mentioned first contactor connect to above-mentioned accumulator and
Between above-mentioned first bus, important load connects to above-mentioned first bus, when this first contactor disconnects, cuts off accumulator
Power supply to important load, to realize electricity under the classification to the important load in accumulator and secondary load, realizes to accumulator
Over, above-mentioned second contactor is normally closed type D.C. contactor, and above-mentioned first contactor connects for magnetic freeze mode direct current
Tentaculum, in the case of disconnecting first contactor, except cutting off the power supply to important load for the accumulator, can also cut simultaneously
The power supply to second contactor for the disconnected accumulator, can realize the purpose of energy-conservation；Further, since second contactor is that normally closed type is straight
Stream catalyst, even if in the case of control circuit failure, it is ensured that can be to important load after DC source recovers output
With secondary load supplying, thus improving the power supply reliability of system.
In order to realize being classified lower electricity, in the preferred embodiment, above-mentioned first contactor 104, in above-mentioned accumulator
Magnitude of voltage reach the first preset value in the case of, disconnected according to the control of above-mentioned lower electric control circuit；Above-mentioned second contactor
106, in the case that the magnitude of voltage of above-mentioned accumulator reaches the second preset value, the control according to above-mentioned lower electric control circuit is broken
Open, wherein, above-mentioned second preset value is more than above-mentioned first preset value.I.e. by being each turned off above-mentioned first contactor 104 and upper
Realize classification since stating second contactor 106 and lower electricity is carried out to important load and secondary load, additionally, when accumulator reaches first
First contactor 104 is disconnected again, it is possible to achieve the cut-out power supply to second contactor 106 for the accumulator in the case of preset value, with
Save the electric energy of accumulator further, preferably over is carried out to accumulator.
Preferably, above-mentioned lower electricity circuit goes for the various direct current groups using DC source and Combined storage battery
Close power-supply system.
In the preferred embodiment, there is provided a kind of direct current combined power supply system, as shown in figure 4, this direct current integrated drive generator
System includes：Above-mentioned any one lower electricity circuit, accumulator, DC source.
In above preferred embodiment, during system worked well, system is normally to load supplying, first contactor
104（Magnetic latching contactor KM1）With second contactor 106（Normally closed D.C. contactor KM2）Be held at on-state it is not necessary to
Expend electric energy control of which line bag to be powered；After DC source quits work, this system continues by accumulator to load
It is powered；When battery discharging is to certain voltage（Be equivalent to above-mentioned second preset value）When, control circuit disconnects the second contact
Device 106（Normally closed type catalyst）To cut off the power supply to secondary load for the accumulator；When battery discharging is to final discharging voltage（Phase
When in above-mentioned first preset value）When, lower electric control circuit sends out a reverse impulse to first contactor 104（Magnetic freeze mode contacts
Device）It is made to disconnect, to cut off the power supply to important load for the accumulator（Now have been turned off the power supply to whole loads for the accumulator）, with
When, also cut-out accumulator is to second contactor 106（Normally closed type catalyst）It is powered, now, second contactor 106（Normally closed
Catalyst）Revert to on-state, all D.C. contactors all do not need to expend electric energy again, be equivalent to such as figure of the prior art
The first lower electricity circuit more energy-conservation shown in 1.Simultaneously as second contactor 106（Normally closed contactor）Recover to connect, that is,
So that lower electric control circuit is broken down, after DC source recovers output, can also ensure to secondary load and important negative simultaneously
The power supply carrying, is equivalent to electric circuit under second as shown in Figure 2 of the prior art relatively reliable.
In the preferred embodiment, there is provided a kind of attachment structure of preferably above-mentioned direct current combined power supply system, as Fig. 4
Shown, above-mentioned accumulator is connected to the first bus of direct current combined power supply system by above-mentioned first contactor 104, above-mentioned heavy
Negative pole to be loaded connects to above-mentioned first bus；Above-mentioned secondary load connects to the second of above-mentioned direct current combined power supply system
On bus, wherein, above-mentioned first bus（Be equivalent to 1L-）With above-mentioned second bus（Be equivalent to 2L-）Contact by above-mentioned second
Device 106 connects.
In order to ensure, in the case of lower electric control circuit is out of order, can ensure that simultaneously when DC source recovers output
Important load and secondary load are powered, in the preferred embodiment, as shown in figure 4, the connection of above-mentioned DC source is supreme
State on the first bus.
In the preferred embodiment, there is provided a kind of lower electric control method, as shown in figure 5, this lower electric control method includes
Step S502 value step S504.
Step S502：The disconnection of first contactor is controlled to cut off the first bus by above-mentioned lower electric control circuit, wherein,
Important load connects to above-mentioned first bus, and above-mentioned first contactor is magnetic freeze mode D.C. contactor；
Step S504：Second bus is cut off by the disconnection that lower electric control circuit controls second contactor, wherein, secondary
Load connects to above-mentioned second bus, and above-mentioned second contactor is normally closed type D.C. contactor.
By above-mentioned steps, control the disconnection of first contactor and second contactor by lower electric control circuit, this
Two catalysts connect between the first bus and the second bus, and secondary load connects to above-mentioned second bus, when this second connects
When tentaculum disconnects, cut off the power supply to secondary load for the accumulator, above-mentioned first contactor connects to above-mentioned accumulator and above-mentioned the
Between one bus, important load connects to above-mentioned first bus, and when this first contactor disconnects, cut-out accumulator is to important
The power supply of load, to realize electricity under the classification to the important load in accumulator and secondary load, realizes the mistake of accumulator is put
Electric protection, above-mentioned second contactor is normally closed type D.C. contactor, and above-mentioned first contactor is magnetic freeze mode D.C. contactor,
In the case of disconnecting first contactor, except the power supply to important load for the accumulator can be cut off, electric power storage can also be cut off simultaneously
The power supply to second contactor for the pond, can realize the purpose of energy-conservation；Further, since second contactor contacts for normally closed type direct current
Device, even if in the case of control circuit failure, it is ensured that can be to important load and secondary after DC source recovers output
Load supplying, thus improve the power supply reliability of system.
In order to realize being classified lower electricity, in the preferred embodiment, the magnitude of voltage in above-mentioned accumulator reaches the first preset value
In the case of, control the disconnection of first contactor by above-mentioned lower electric control circuit；Reach the in the magnitude of voltage of above-mentioned accumulator
In the case of two preset values, control the disconnection of second contactor, wherein, above-mentioned second preset value by above-mentioned lower electric control circuit
More than above-mentioned first preset value.
During stating lower electric control method on the implementation, in the preferred embodiment, there is provided a kind of preferably control
Method, for example, taking such as Fig. 4 as a example, in a preferred embodiment, direct current combined power supply system to include a DC source DC, one
Individual control circuit Ctrl, as a example a Battery pack Battery, this direct current combined power supply system is taking negative output as a example.This direct current combines
The direct current negative busbar of power-supply system is divided into two sections, i.e. bus 1L- and bus 2L-, first paragraph negative busbar 1L- and second segment negative busbar
Pass through normally closed contactor KM2 between 2L-（Be equivalent to above-mentioned second contactor 106）Connect, above-mentioned accumulator is kept by magnetic
Catalyst KM1（Be equivalent to above-mentioned first contactor 104）Connect to the first bus of direct current combined power supply system（1L-）On, on
State important load to connect to above-mentioned first bus, above-mentioned DC source connects to above-mentioned first bus, be connected in parallel to above-mentioned
Between one catalyst 104 and above-mentioned important load；Above-mentioned secondary load connects to the second mother of above-mentioned direct current combined power supply system
Line（2L-）On, wherein, above-mentioned first bus and above-mentioned second bus are connected by above-mentioned second contactor 106.Because this direct current
Combined power supply system is negative output, positive bus-bar L+ not segmentation.During direct current combined power supply system normal work, normally closed direct current connects
Tentaculum and magnetic latching contactor KM1（Be equivalent to above-mentioned first contactor 104）It is held at on-state it is not necessary to expend electricity
Can, direct current combined power supply system is normally to all load supplyings；After DC source no exports, direct current combined power supply system continue by
Accumulator is powered to all loads；When battery discharging is to certain voltage（Be equivalent to above-mentioned second preset value）When, lower electricity
Control circuit disconnects normally closed contactor, to cut off the power supply to secondary load for the accumulator；When battery discharging is to electric discharge end of a period electricity
Pressure（Be equivalent to above-mentioned first preset value）When, lower electric control circuit sends out a reverse impulse to magnetic latching contactor, to cut off storage
The power supply to whole loads for the battery, meanwhile, also cut-out accumulator is to second contactor 106（Normally closed contactor）It is powered, this
When, second contactor 106（Normally closed contactor）Revert to on-state, all D.C. contactors all do not need to expend electric energy again,
Be equivalent to the first lower electricity circuit more energy-conservation as shown in Figure 1 of the prior art.Simultaneously as second contactor 106（Often
Close catalyst）Recover to connect, even if lower electric control circuit breaks down, after DC source recovers output, can also be simultaneously
Ensure power supply to secondary load and important load, be equivalent under second as shown in Figure 2 of the prior art electric circuit more
Plus it is reliable.
As can be seen from the above description, above preferred embodiment achieves following technique effect：By lower electric control
Controlling the disconnection of first contactor and second contactor and to connect, this second contactor connects to the first bus and second circuit
Between bus, secondary load connects to above-mentioned second bus, and when this second contactor disconnects, cut-out accumulator is to secondary negative
The power supply carrying, above-mentioned first contactor connects between above-mentioned accumulator and above-mentioned first bus, and important load connects to above-mentioned
On first bus, when this first contactor disconnects, cut off the power supply to important load for the accumulator, to realize in accumulator
Electricity under the classification of important load and secondary load, realizes the over to accumulator, and above-mentioned second contactor is normally closed type
D.C. contactor, above-mentioned first contactor is magnetic freeze mode D.C. contactor, in the case of disconnecting first contactor, except can
To cut off the power supply to important load for the accumulator, the power supply to second contactor for the accumulator can also be cut off, with can be real simultaneously
The purpose of existing energy-conservation；Further, since second contactor is normally closed type D.C. contactor, even if the situation in control circuit failure
Under, it is ensured that can be to important load and secondary load supplying, thus improving the power supply of system after DC source recovers output
Reliability.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of lower electricity circuit is it is characterised in that include：
Lower electric control circuit, for controlling the disconnection of first contactor and second contactor and connecting；
Described first contactor, connects between accumulator and the first bus, important load connects to described first bus, institute
Stating first contactor is magnetic freeze mode D.C. contactor；
Described second contactor, connects between the first bus and the second bus, secondary load connects to described second bus,
Described second contactor is normally closed type D.C. contactor.
2. according to claim 1 lower electricity circuit it is characterised in that
Described first contactor, in the case of reaching the first preset value in the magnitude of voltage of described accumulator, under described
The control of electric control circuit disconnects；
Described second contactor, in the case that the magnitude of voltage of described accumulator reaches the second preset value, according to automatically controlled under described
The control of circuit processed disconnects, and wherein, described second preset value is more than described first preset value.
3. a kind of direct current combined power supply system is it is characterised in that include：Lower electricity circuit described in claim 1 or 2, accumulator
And DC source, wherein, described DC source connects to the first bus.
4. direct current combined power supply system according to claim 3 it is characterised in that
Described accumulator is connected to the first bus of direct current combined power supply system by described first contactor, described important negative
Carry and connect to described first bus；
Described secondary load connects to the second bus of described direct current combined power supply system, wherein, described second bus and institute
State the first bus to connect by described second contactor.
5. direct current combined power supply system according to claim 4 it is characterised in that
Described DC source connects to described first bus.
6. a kind of lower electric control method is it is characterised in that include：
Connection between second bus and the first bus is cut off by the disconnection that lower electric control circuit controls second contactor, its
In, secondary load connects to described second bus, and described second contactor is normally closed type D.C. contactor；
The disconnection of first contactor is controlled to cut off between described first bus and accumulator by described lower electric control circuit
Connect, wherein, important load connects to described first bus, described first contactor is magnetic freeze mode D.C. contactor.
7. method according to claim 6 it is characterised in that
In the case that the magnitude of voltage of accumulator reaches the first preset value, first contactor is controlled by described lower electric control circuit
Disconnection；
In the case that the magnitude of voltage of described accumulator reaches the second preset value, second is controlled to connect by described lower electric control circuit
The disconnection of tentaculum, wherein, described second preset value is more than described first preset value.
8. method according to claim 7 it is characterised in that
Described accumulator is connected to the first bus of direct current combined power supply system by described first contactor, described important negative
Carry and connect to described first bus；
Described secondary load connects to the second bus of described direct current combined power supply system, wherein, described first bus and institute
State the second bus to connect by described second contactor.
9. method according to claim 8 it is characterised in that
DC source connects to described first bus.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210377980.8A CN103715750B (en) | 2012-10-08 | 2012-10-08 | Power-off circuit, direct-current combination power supply system and power-off control method |
| PCT/CN2013/079736 WO2013174316A1 (en) | 2012-10-08 | 2013-07-19 | Power-off circuit, direct current combination power supply system and power-off control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210377980.8A CN103715750B (en) | 2012-10-08 | 2012-10-08 | Power-off circuit, direct-current combination power supply system and power-off control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103715750A CN103715750A (en) | 2014-04-09 |
| CN103715750B true CN103715750B (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210377980.8A Active CN103715750B (en) | 2012-10-08 | 2012-10-08 | Power-off circuit, direct-current combination power supply system and power-off control method |
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| CN (1) | CN103715750B (en) |
| WO (1) | WO2013174316A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110474395A (en) * | 2019-08-27 | 2019-11-19 | 常州格力博有限公司 | Electric system |
| CN113037508B (en) * | 2019-12-24 | 2022-10-25 | 华为技术有限公司 | Power-down control circuit and power-down control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5864221A (en) * | 1997-07-29 | 1999-01-26 | Trw Inc. | Dedicated avionics standby power supply |
| CN2437531Y (en) * | 2000-07-14 | 2001-07-04 | 徐平 | Storage battery overdischarge protector for moped |
| CN201113406Y (en) * | 2007-09-11 | 2008-09-10 | 邢建峰 | A battery protection circuit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002162150A (en) * | 2000-11-24 | 2002-06-07 | Sawafuji Electric Co Ltd | Power supply for in-vehicle refrigerator |
| JP2010057290A (en) * | 2008-08-28 | 2010-03-11 | Sanyo Electric Co Ltd | Power supply for vehicle |
| CN101989515B (en) * | 2009-07-30 | 2013-11-13 | 艾默生网络能源系统北美公司 | Magnetic latching contactor and communication power supply system |
| CN101826747B (en) * | 2010-03-19 | 2012-09-19 | 艾默生网络能源有限公司 | A communication power supply circuit |
| CN101854072B (en) * | 2010-05-11 | 2013-06-19 | 中达电通股份有限公司 | DC contactor control system, control method and master control system |
-
2012
- 2012-10-08 CN CN201210377980.8A patent/CN103715750B/en active Active
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2013
- 2013-07-19 WO PCT/CN2013/079736 patent/WO2013174316A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5864221A (en) * | 1997-07-29 | 1999-01-26 | Trw Inc. | Dedicated avionics standby power supply |
| CN2437531Y (en) * | 2000-07-14 | 2001-07-04 | 徐平 | Storage battery overdischarge protector for moped |
| CN201113406Y (en) * | 2007-09-11 | 2008-09-10 | 邢建峰 | A battery protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103715750A (en) | 2014-04-09 |
| WO2013174316A1 (en) | 2013-11-28 |
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