CN109066958A - Power supply serial and parallel switching circuit and switching method and power-supply device - Google Patents
Power supply serial and parallel switching circuit and switching method and power-supply device Download PDFInfo
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- CN109066958A CN109066958A CN201811052798.9A CN201811052798A CN109066958A CN 109066958 A CN109066958 A CN 109066958A CN 201811052798 A CN201811052798 A CN 201811052798A CN 109066958 A CN109066958 A CN 109066958A
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- power supply
- hilted broadsword
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- 238000000034 method Methods 0.000 title abstract description 10
- 239000004065 semiconductor Substances 0.000 claims description 23
- 230000003071 parasitic effect Effects 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 8
- 238000010891 electric arc Methods 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
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- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000024241 parasitism Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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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
- H02J7/36—Arrangements using end-cell switching
-
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
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- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a kind of power supply serial and parallel switching circuit and switching methods and power-supply device.Power supply serial and parallel switching circuit, comprising: the first power supply, second source, the first hilted broadsword two-way switch, the second hilted broadsword two-way switch, the first power switch circuit；First hilted broadsword two-way switch, the second hilted broadsword two-way switch the first contact be electrically connected respectively with the second electrode of the first electrode of second source, the first power supply, first hilted broadsword two-way switch, the second hilted broadsword two-way switch the second contact be electrically connected respectively with the first electrode of the first power supply, the second electrode of second source, first power switch circuit is connected electrically between the third contact of the first hilted broadsword two-way switch, the second hilted broadsword two-way switch, the anode of first power supply is electrically connected with the anode of voltage output end, and the cathode of second source is electrically connected with the cathode of voltage output end.
Description
Technical field
The present invention relates to a kind of power supply serial and parallel switching circuit and switching methods and power-supply device.
Background technique
The car emergency startup power supply of market is broadly divided into three kinds at present, the first is the automobile for supporting 12V lead-acid battery
Starting, second is the automobile starting for supporting 24V lead-acid battery, the third is the automobile for supporting 12V and 24V lead-acid battery simultaneously
Starting, but the inside is equipped with two sets of completely self-contained 12V and 24V activation systems.The third startup power supply compensates for two kinds of front
Power supply cannot be compatible with the problem of 12V and 24V lead-acid battery automobile simultaneously, but volume is big, and operation is inflexible, and user experience is not
It is fine.
Summary of the invention
The first purpose of the embodiment of the present invention is to provide a kind of power supply serial and parallel switching circuit and switching method and power supply
Equipment can realize that series, parallel exports using two power supplys using the technical solution, externally export different voltages.
In a first aspect, a kind of power supply serial and parallel switching circuit provided in an embodiment of the present invention, comprising: the first power supply, second
Power supply, the first hilted broadsword two-way switch, the second hilted broadsword two-way switch, the first power switch circuit；
First contact of the first hilted broadsword two-way switch is electrically connected with the first electrode of the second source, the second hilted broadsword two-way
First contact of switch is electrically connected with the second electrode of the first power supply, and the first electrode is one of positive, cathode, the
Two electrodes be it is another,
The first electrode of second contact of the first hilted broadsword two-way switch and first power supply, the second hilted broadsword two-way are opened
The second contact closed is electrically connected with the second electrode of the second source,
First power switch circuit is connected electrically in the third touching of the first hilted broadsword two-way switch, the second hilted broadsword two-way switch
Between point,
The anode of first power supply is electrically connected with the anode of voltage output end, and the cathode of the second source and the voltage are defeated
The cathode of outlet is electrically connected.
Optionally, first power switch circuit includes: the first power switch tube.
Optionally, first power switch tube is N-type metal-oxide-semiconductor, drain electrode and the of the first hilted broadsword two-way switch
The electrical connection of three contacts, source electrode are electrically connected with the third contact of the second hilted broadsword two-way switch.
Optionally, first power switch circuit further include:
Second power switch tube, two switch terminals and first power switch tube are connected in series, when first power switch tube
When conducting, the second power switch tube conducting,
The parasitic diode of the current direction of the parasitic diode of second power switch tube and first power switch tube
Current direction it is opposite.
Optionally, further include the second power switch circuit, be connected electrically in first power supply and second source and for outer
It connects between the power output end of load.
Optionally, second power switch circuit includes:
Third power switch tube, the cathode of the parasitic diode of the third power switch tube and the cathode of the power output end
Electrical connection, positive the second contact with the second hilted broadsword two-way switch is electrically connected.
Optionally, second power switch tube is N-type metal-oxide-semiconductor, and the cathode of source electrode and the power output end is electrically connected
It connects, drain electrode is electrically connected with the second contact of the second hilted broadsword two-way switch.
Optionally, the first hilted broadsword two-way switch, and/or the second hilted broadsword two-way switch are as follows: relay.
Optionally, for being attracted the portion of conducting to the first contact and the second contact that control the first hilted broadsword two-way switch
The power supply of part power supply are as follows: the cathode of the anode of second source, the first power supply.
Optionally, for being attracted the portion of conducting to the first contact and the second contact that control the second hilted broadsword two-way switch
The power supply of part power supply are as follows: the cathode of the anode of second source, the first power supply.
Optionally, when the first hilted broadsword two-way switch unpowered inputs, the first contact is connected with third contact, institute
The first contact and the second contact is stated to disconnect；
When the first hilted broadsword two-way switch has the supply input, the first contact and third contact are disconnected, and described first
Contact is connected with the second contact.
Optionally, when the second hilted broadsword two-way switch unpowered inputs, the first contact is connected with third contact, institute
The first contact and the second contact is stated to disconnect；
When the second hilted broadsword two-way switch has the supply input, the first contact and third contact are disconnected, and described first
Contact is connected with the second contact.
Optionally, third power is also parallel between the first contact, the second contact of the first hilted broadsword two-way switch
Switching circuit.
Optionally, third power switch circuit includes: metal-oxide-semiconductor, the current direction of parasitic diode and the third function
Current direction when rate switching tube is connected is opposite.
Optionally, third power switch circuit includes: N-type metal-oxide-semiconductor, and the anode of source electrode and first power supply is electrically connected
It connects, drains and be electrically connected with the anode of the second source.
Optionally, the 4th power is also parallel between the first contact, the second contact of the second hilted broadsword two-way switch
Switching circuit.
Optionally, the 4th power switch circuit includes: metal-oxide-semiconductor, the current direction of parasitic diode and the third function
Current direction when rate switching tube is connected is opposite.
Optionally, the 4th power switch circuit includes: p-type metal-oxide-semiconductor, and the cathode of source electrode and the second source is electrically connected
It connects, drain electrode is electrically connected with the cathode of first power supply.
Optionally, the first electrode is one of anode, cathode, and the second electrode is anode, cathode
It is another.
Second aspect, a kind of series-parallel switching method of power supply provided in an embodiment of the present invention, comprising:
The first contact of the first hilted broadsword two-way switch, the second hilted broadsword two-way switch is connected with third contact, described in control
The conducting of first power switch circuit, the first power supply, second source are connected in series connection by first power switch circuit；
Control first power switch circuit shutdown, make respectively the first hilted broadsword two-way switch, the second hilted broadsword two-way switch the
One contact is connected with the second contact, and the first power supply, second source are opened by the first hilted broadsword two-way switch, the second hilted broadsword two-way
The access of pass is in parallel, and first power supply externally exports electric current, the second source by the second hilted broadsword two-way switch
Electric current is externally exported by the first hilted broadsword two-way switch；
The first hilted broadsword two-way switch, the second hilted broadsword two-way switch the first contact can be touched respectively with the second contact or third
Point conducting；
The first hilted broadsword two-way switch, the second contact of the second hilted broadsword two-way switch are electric with the second of first power supply respectively
The first electrode electrical connection of pole, second source,
First power switch circuit is connected electrically in the third touching of the first hilted broadsword two-way switch, the second hilted broadsword two-way switch
Between point.
Optionally, after the first power supply, second source are connected in series connection by first power switch circuit,
Alternatively,
It is in parallel in the first power supply, second source by the access of the first hilted broadsword two-way switch, the second hilted broadsword two-way switch
Later,
Conducting is connected electrically in the second power switch between first power supply, second source and the power output end of external load
Circuit, external out-put supply.
The third aspect, a kind of power-supply device provided in an embodiment of the present invention, including above-mentioned any power supply are series-parallel
Switching circuit.
11, according to claim 1 to 7 any power supply serial and parallel switching circuit, characterized in that
When the first hilted broadsword two-way switch unpowered input, the first contact is connected with third contact, first contact
It is disconnected with the second contact；
When the first hilted broadsword two-way switch has the supply input, the first contact and third contact are disconnected, and described first
Contact is connected with the second contact.
12, according to claim 1 to 7 any power supply serial and parallel switching circuit, characterized in that
When the second hilted broadsword two-way switch unpowered input, the first contact is connected with third contact, first contact
It is disconnected with the second contact；
When the second hilted broadsword two-way switch has the supply input, the first contact and third contact are disconnected, and described first
Contact is connected with the second contact.
13, according to claim 1 to 7 any power supply serial and parallel switching circuit, characterized in that
Third power switch circuit is also parallel between the first contact, the second contact of the first hilted broadsword two-way switch.
14, power supply serial and parallel switching circuit according to claim 13, characterized in that
Third power switch circuit includes: metal-oxide-semiconductor, and the current direction of parasitic diode is connected with the third power switch tube
When current direction it is opposite.
15, power supply serial and parallel switching circuit according to claim 14, characterized in that
Third power switch circuit includes: N-type metal-oxide-semiconductor, and source electrode be electrically connected with the anode of first power supply, drain with it is described
The anode electrical connection of second source.
16, according to claim 1 to 7 any power supply serial and parallel switching circuit, characterized in that
The 4th power switch circuit is also parallel between the first contact, the second contact of the second hilted broadsword two-way switch.
17, power supply serial and parallel switching circuit according to claim 13, characterized in that
4th power switch circuit includes: metal-oxide-semiconductor, and the current direction of parasitic diode is connected with the third power switch tube
When current direction it is opposite.
18, power supply serial and parallel switching circuit according to claim 17, characterized in that
4th power switch circuit includes: p-type metal-oxide-semiconductor, and source electrode is electrically connected with the cathode of the second source, drain electrode with it is described
The cathode of first power supply is electrically connected.
19, according to claim 1 to 7 any power supply serial and parallel switching circuit, characterized in that
The first electrode is one of anode, cathode, and the second electrode is positive, cathode another.
20, the series-parallel switching method of a kind of power supply, characterized in that include:
The first contact of the first hilted broadsword two-way switch, the second hilted broadsword two-way switch is connected with third contact, described in control
The conducting of first power switch circuit, the first power supply, second source are connected in series connection by first power switch circuit；
Control first power switch circuit shutdown, make respectively the first hilted broadsword two-way switch, the second hilted broadsword two-way switch the
One contact is connected with the second contact, and the first power supply, second source are opened by the first hilted broadsword two-way switch, the second hilted broadsword two-way
The access of pass is in parallel, and first power supply externally exports electric current, the second source by the second hilted broadsword two-way switch
Electric current is externally exported by the first hilted broadsword two-way switch；
The first hilted broadsword two-way switch, the second hilted broadsword two-way switch the first contact can be touched respectively with the second contact or third
Point conducting；
The first hilted broadsword two-way switch, the second contact of the second hilted broadsword two-way switch are electric with the second of first power supply respectively
The first electrode electrical connection of pole, second source,
First power switch circuit is connected electrically in the third touching of the first hilted broadsword two-way switch, the second hilted broadsword two-way switch
Between point.
21, the series-parallel switching method of a kind of power supply according to claim 20, characterized in that
After the first power supply, second source are connected in series connection by first power switch circuit,
Alternatively,
It is in parallel in the first power supply, second source by the access of the first hilted broadsword two-way switch, the second hilted broadsword two-way switch
Later,
Conducting is connected electrically in the second power switch between first power supply, second source and the power output end of external load
Circuit, external out-put supply.
22, a kind of power-supply device, it is characterized in that any power supply including claim 1 to 11 switches electricity in series and parallel
Road.
Therefore using the present embodiment technical solution, it can realize that series, parallel exports using two power supplys, externally export
Different voltages, and circuit safety is strong.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, not
Constitute inappropriate limitation of the present invention.
Fig. 1 is a kind of power supply serial and parallel switching circuit schematic illustration that the embodiment of the present invention 1 provides；
Circuit theory schematic diagram when Fig. 2 is the first power supply of Fig. 1 circuit, second source is in series connection；
Circuit theory schematic diagram when Fig. 3 is the first power supply of Fig. 1 circuit, second source is in parallel connection；
Fig. 4 is a kind of power supply serial and parallel switching circuit preferred embodiment schematic illustration that the embodiment of the present invention 1 provides；
Fig. 5 is the first power supply serial and parallel switching circuit preferred embodiment schematic illustration that the embodiment of the present invention 1 provides；
Fig. 6 is second of power supply serial and parallel switching circuit preferred embodiment schematic illustration that the embodiment of the present invention 1 provides；
Fig. 7 is the third power supply serial and parallel switching circuit preferred embodiment schematic illustration that the embodiment of the present invention 1 provides；
The circuit theory schematic diagram of load short circuits moment occurs when Fig. 8 is circuit in parallel shown in Fig. 7；
Fig. 9 is equivalent circuit schematic of the circuit after load short circuits shown in Fig. 8；
Figure 10 is the 4th kind of power supply serial and parallel switching circuit preferred embodiment schematic illustration that the embodiment of the present invention 1 provides；
Equivalent circuit theory schematic diagram when Figure 11 is the first power supply of circuit shown in Fig. 9, second source parallel connection.
Figure 12 is the 5th kind of power supply serial and parallel switching circuit preferred embodiment principle signal that the embodiment of the present invention 1 provides
Figure.
Specific embodiment
Below in conjunction with attached drawing and specific embodiment, the present invention will be described in detail, herein illustrative examples of the invention
And explanation is used to explain the present invention, but not as a limitation of the invention.
Embodiment 1
It is shown in Figure 1, present embodiments provide a kind of power supply serial and parallel switching circuit comprising: the first power supply BT1, second
Power supply BT2, the first hilted broadsword two-way switch K1, the second hilted broadsword two-way switch K2, the first power switch circuit M1.
For convenience, the first electrode of the present embodiment is one of positive "+", cathode "-", and second electrode is
It is another.
It is below positive "+" with first electrode, second electrode is that cathode "-" is illustrated.
It is defeated with the cathode "-" of second source BT2 using the positive "+" of the first power supply BT1 as the positive "+" of out-put supply
The cathode "-" of power supply out.The first contact A of first hilted broadsword two-way switch K1 is electrically connected with the positive "+" of second source BT2, the
The first contact A of two hilted broadsword two-way switch K2 is electrically connected with the cathode "-" of the first power supply BT1.
The second contact B of first hilted broadsword two-way switch K1 is electrically connected with the positive "+" of the first power supply BT1, and the second hilted broadsword is double
The second contact B of way switch K2 is electrically connected with the cathode "-" of second source BT2,
First power switch circuit M1 is connected electrically in the third contact C and the second hilted broadsword two-way switch of the first hilted broadsword two-way switch K1
Between the third contact C of K2.
The working principle of circuit shown in Fig. 1 is as follows:
It is shown in Figure 2, it is connected when controlling the first power switch circuit M1, also, make the first hilted broadsword two-way switch K1, the second list
When the first contact A of knife two-way switch K2 is connected with third contact C respectively, the positive "+" and the first power supply of second source BT2
The cathode "-" of BT1 is electrically connected, and the first power supply BT1, second source BT2 are connected in series, the first power supply BT1 positive "+", the
The cathode "-" output of two power supply BT2 is connected the output voltage formed by the first power supply BT1, second source BT2.
It is shown in Figure 3, the first hilted broadsword two-way switch K1, the second hilted broadsword two-way switch K2 the first contact A respectively with
When two contact B are connected, the positive "+" of the first power supply BT1 is electrically connected with second source BT2 anode "+", and the first power supply BT1's is negative
Pole "-" is electrically connected with second source BT2 cathode "-", forms the first power supply BT1, second source BT2 parallel connectivity, the
Positive "+" that one power supply BT1, second source BT2 are in parallel, cathode "-" output-parallel voltage.The first power supply BT1 passes through at this time
The access of second hilted broadsword two-way switch K2 externally exports electric current, and second source BT2 passes through the access of the first hilted broadsword two-way switch K1
Externally output electric current, in circuit design, it is only necessary to using the first hilted broadsword two-way switch K1, the second hilted broadsword two-way of same size
Switch K2, keeps their internal resistance identical, that is, can ensure that when the first power supply BT1, second source BT2 externally output electric current in parallel,
It is full symmetric that it exports electric current, and it is completely the same to make to flow through the first power supply BT1, the electric current of second source BT2, it is advantageously ensured that first
The consistency of power supply BT1, second source BT2.In particular, using rechargeable batteries such as lithium ion battery or lead-acid batteries as
When one power supply BT1, second source BT2, the service life of battery is conducive to extend using the technical program.
As the signal of the present embodiment, in the series-parallel handoff procedure for carrying out power supply, opened switching the first hilted broadsword two-way
Before closing K1 and the second hilted broadsword two-way switch K2, the first power switch tube Q1 off state is preferably remained, completes the first hilted broadsword
The first power switch tube Q1 is just connected after the contact change-over of two-way switch K1 and the second hilted broadsword two-way switch K2, using the skill
Art scheme may insure that the first hilted broadsword two-way switch K1 and the contact change-over moment of the second hilted broadsword two-way switch K2 do not generate electricity
Arc avoids damage of the electric arc to switch.
When power supply is switched to parallel connection by connecting, it is first turned off the first power switch circuit M1, makes the first hilted broadsword two-way switch
No current flows through between the first contact A of K1, third contact C, makes the first contact A, the third touching of the second hilted broadsword two-way switch K2
No current flows through between point C, then the first contact A of the first hilted broadsword two-way switch K1 is switched to respectively and is connected with the second contact B,
And the first contact A of the second hilted broadsword two-way switch K2 is switched to respectively and is connected with the second contact B, circuit is switched at this time
One power supply BT1, second source BT2 are in parallel.In the mistake that the first hilted broadsword two-way switch K1 and the second hilted broadsword two-way switch K2 switches
Cheng Zhong, due to no current between the first contact A, third contact C, without pressure drop (the first hilted broadsword between the first contact A, the second contact B
The first contact A of two-way switch K1 and the second hilted broadsword two-way switch K2 respectively with the first power supply BT1, second source BT2 just
The electrical connection of pole "+", the second contact B is electrically connected with the cathode "-" of the first power supply BT1, second source BT2 respectively, therefore the first contact
A, the second contact B is without pressure drop), electricity is not generated in the first hilted broadsword two-way switch K1, the first hilted broadsword two-way switch K1 contact change-over
Arc avoids damage of the electric arc to switch.
When power supply is switched to series connection by parallel connection, first disconnect load output electric current, make the first hilted broadsword two-way switch K1 and
No current between the first contact A of second hilted broadsword two-way switch K2, the second contact B, then by the first hilted broadsword two-way switch K1, with
And second the first contact A of hilted broadsword two-way switch K2 be switched to be connected with third contact C respectively, the first power is finally connected again and opens
It closes, circuit is switched to the first power supply BT1, second source BT2 series connection at this time.It is single in the first hilted broadsword two-way switch K1 and second
Knife two-way switch K2 switches moment, due to no current between the first contact A, the second contact B, the first contact A, third contact C it
Between without pressure drop (when contact change-over, the first power switch is in an off state, and third contact C is maintained at high potential), therefore first
Electric arc is not generated when hilted broadsword two-way switch K1, the first hilted broadsword two-way switch K1 contact change-over, avoids damage of the electric arc to switch.
Therefore it is opened in the switching circuit of the present embodiment using the first hilted broadsword two-way switch K1, the second hilted broadsword two-way
Close K2 and realize series-parallel switching, switch it is highly reliable, and conventional solid switch touching is avoided using the present embodiment technical solution
Point switching generates the technological deficiency of electric arc.
In addition, shown in Figure 4, the first power switch circuit M1 of the present embodiment can be using a power switch tube (note
For the first power switch tube Q1, which is preferably metal-oxide-semiconductor) it realizes, be conducive to improve using power switch tube realization
The speed of switch, improves the reaction speed of circuit, and switch is avoided to strike sparks.
Fig. 4 is to use N-type metal-oxide-semiconductor to make the drain electrode of N-type metal-oxide-semiconductor in connection for signal as the first power switch tube Q1
The positive "+" of second source BT2 (is connected) in " D " electrical connection by first the first contact A of hilted broadsword two-way switch K1, third contact C,
Source electrode " S " with the cathode "-" for being electrically connected the first power supply BT1 the second hilted broadsword two-way switch K2 the first contact A be electrically connected.
It is shown in Figure 4, since there are parasitic diode D1 by the first power switch tube Q1, at the first power switch tube Q1
In off state, it can not be passed through by the electric current in the direction " D " to source electrode " S " that drains, be able to achieve the complete pass of circuit in the direction
It is disconnected；But may be flowed through from parasitic diode D1 by the electric current in source electrode " S " to drain electrode direction " D ", cause the direction complete
The case where turning off, causing the first power switch circuit M1 that can only unidirectionally turn off.In order to further increase the first power switch circuit
The shutdown completeness of M1 realizes two-way shutdown, realizes that circuit is shown in Figure 5.
Shown in Figure 5, as the signal of the present embodiment, the first power switch circuit M1 of the present embodiment further includes second
Power switch tube Q2, the second power switch tube Q2 connect with the first power switch tube Q1, the second power switch tube Q2 and first
The synchronous conducting of power switch tube Q1.
As the signal of the present embodiment, Fig. 5 is to contain the N-type metal-oxide-semiconductor of parasitic diode D1 as the second power switch tube
Q2 is signal, makes the second power switch tube Q2 is opposite with the first power switch tube Q1 to be grounded series connection, even if the second power is opened
The source electrode " S " for closing pipe Q2 is electrically connected with the source electrode " S " of the first power switch tube Q1, error of omission " D " and the second hilted broadsword two-way switch K2
Third contact C electrical connection, so that the control terminal grid " G " of the first power switch tube Q1, the second power switch tube Q2 is attempted by one
It rises, synchronous conducting or synchronous shutdown under same switch control signal.In the circuit, the parasitism two of the second power switch tube Q2
The direction pole pipe D1 is contrary with the parasitic diode D1 of the first power switch tube Q1, makes even if second switch due to failure not
When conducting synchronous with the first power switch tube Q1, electric current can be flowed through from the parasitic diode D2 of the second power switch tube Q2, really
Protect the series connection for realizing the first power supply BT1, second source BT2.In addition, differential concatenation the present embodiment after the first power switch tube Q1
Second power switch tube Q2's, reversely charging electric current can also be separated using the parasitic diode D2 of the second power switch tube Q2, avoided
The first power supply of reversely charging current direction BT1, second source BT2, damage power supply, further increase the safety of circuit, mention
The service life of high power supply.
It is shown in Figure 6, as the signal of the present embodiment, can also be constituted in the first power supply BT1 and second source BT2
Further connect the second power switch circuit M2 between series-parallel circuit and the power output end for external load, passes through control
The conducting and shutdown of second power switch circuit M2 controls conducting and shutdown to the output electric current of load.In this way into
When the series-parallel switching of row power supply, the second power switch circuit M2 is turned off first, the output electric current of power cutoff, so that it is guaranteed that by
The contact no current of switching, generation when the first hilted broadsword two-way switch K1, the second hilted broadsword two-way switch K2 being avoided to carry out contact change-over
Electric arc.
As the signal of the present embodiment, Fig. 6 is (to be denoted as the second power switch tube Q3, which opens using power switch tube
Closing pipe is preferably metal-oxide-semiconductor) it realizes, the speed for being conducive to improve switch is realized using power switch tube, improves the reaction speed of circuit
Degree, and switch is avoided to strike sparks.
Fig. 6 is to use the N-type metal-oxide-semiconductor for containing parasitic diode D3, for preferred signal, to make as third power switch tube Q3
Third power switch tube Q3 is connected to the cathode "-" end of power output end, makes the source electrode " S " and second of third power switch tube Q3
The cathode "-" of battery is electrically connected, and drain electrode " D " is electrically connected with the cathode "-" of power output end, and grid " D " accesses switch control letter
Number, make the current direction when direction parasitic diode D3 therein and switch conduction on the contrary, reverse current is avoided to flow to the first electricity
Source BT1, second source BT2, damage power supply, further increase the safety of circuit, improve the service life of power supply.And
And the present embodiment technical solution is used using third power switch tube Q3, it also further ensures when Q3 is in nonconducting state
When, it avoids the first hilted broadsword two-way switch K1, the second hilted broadsword two-way switch K2 band from carrying switching, avoids generating electric arc when switching.
As the present embodiment signal rather than limit, the first hilted broadsword two-way switch K1, the second hilted broadsword two-way of the present embodiment
One of both switch K2 can all be realized using relay.
It is shown in Figure 7, it can be, but not limited to using following optimal technical scheme, make the first hilted broadsword two-way switch K1, the
The power supply of two hilted broadsword two-way switch K2 is that the positive "+" of second source BT2 and the cathode "-" of the first power supply BT1 mention
For.In unpowered input, the first hilted broadsword two-way switch K1, the first contact A of the second hilted broadsword two-way switch K2 and third contact C
It is connected (normally off being commonly called as), the first contact A and the second contact B shutdown (what is be commonly called as is normally opened).When there is supply input,
First hilted broadsword two-way switch K1, the first contact A of the second hilted broadsword two-way switch K2 and third contact C are disconnected, the first contact A and the
Two contact B are mutually attracted conducting.There is technical effect further below using the optimal technical scheme:
If current circuit be in the first power supply BT1, second source BT2 when being in parallel, if it happens load short circuits at this time are at this time
The positive and negative anodes of first power supply BT1, second source BT2 parallel with one another are short-circuit, are easy to happen power supply equal danger on fire, and use this
Embodiment technical solution, equivalent circuit is as shown in figure 8, as seen from Figure 8 at this time, at this time the cathode "-" and second of the first power supply BT1
The positive "+" of power supply BT2 is electrically connected, at this point, due to controlling the first hilted broadsword two-way switch K1 and the second hilted broadsword two-way switch K2
The first contact A and the coil power supply that is mutually attracted of the second contact B be positive "+" and the first power supply BT1 by second source BT2
Cathode "-" provide, the power supply for being supplied to coil at this time be in short-circuit condition, i.e. coil unpowered input, so the first hilted broadsword
The first contact A of two-way switch K1 and the second hilted broadsword two-way switch K2 can not be attracted with the second contact B, the first hilted broadsword two-way
Switch K1 and the second hilted broadsword two-way switch K2 can switch to the normality of unpowered input, i.e. the first hilted broadsword two-way switch at once
The first contact A of K1 and the second hilted broadsword two-way switch K2 can switch to the state being conducted with third contact C at once respectively,
Equivalent circuit at this time is as shown in figure 9, shown in Figure 9, at this time, it is assumed that the first power in the first power switch circuit M1 is opened
Pass pipe Q1, the second power switch tube Q2 are in normal turn-off state, at this time between the positive "+" and cathode "-" of the first power supply BT1
Current loop can not be formed, current loop, Bu Huifa can not be formed between the positive "+" and cathode "-" of second source BT2
Raw power supply short circuit is dangerous；Even if in addition, it is assumed that the first power switch tube Q1 in the first power switch circuit M1, the second function at this time
Rate switching tube Q2 is connected due to malfunction conducting or due to failure, then the first power supply BT1, second source BT2 are in string at this time
Join connection relationship, still, at this time due to for controlling the first hilted broadsword two-way switch K1 and the second hilted broadsword two-way switch K2
The coil that one contact A and the second contact B are mutually attracted is in unpowered input state, thus the first hilted broadsword two-way switch K1, with
And second the first contact A of hilted broadsword two-way switch K2 can not be attracted with the second contact B, will not be missed due to above-mentioned electronic switching tube
The mistake switching for acting and power supply being caused to connect, current circuit can not switch to series connection, at this time the positive "+" of the first power supply BT1
Current loop still can not be formed between cathode "-", between the positive "+" and cathode "-" of second source BT2 also still
Current loop can not be formed, power supply short circuit danger will not occur.
To sum up, using the present embodiment preferred embodiment, a kind of connect is established from hardware and is designed with mutual exclusion in parallel, from
The case where power supply short circuit is reliably avoided on hardware substantially increases the safety of circuit.
As using technical solution shown in Fig. 7, if current first power supply BT1, second source BT2 be in it is shown in Fig. 3 simultaneously
Connection state, at this point, even if the series connection switching that the first power switch circuit M1 has carried out mistake due to external disturbance or failure is moved
Make (the first power switch circuit M1 is connected), but the first hilted broadsword two-way switch K1 and the second hilted broadsword two-way switch at this time
K2 is in power-up state, and the first contact A is connected with the second contact B, and the malfunction of the first power switch circuit M1 is to current
Parallel circuit has no effect, and the changing of the relative positions that circuit is not compromised by first power switch circuit M1 is made and switches to series-like
State.
As using technical solution shown in Fig. 7, if current first power supply BT1, second source BT2 are in string shown in Fig. 2
When connection state, the first power supply BT1, second source BT2 connect at this time, at this time the first hilted broadsword two-way switch K1 and the second hilted broadsword
Two-way switch K2 is in off-position, and contact is in normally off, even if instruction input in parallel vicious at this time is to first single
Knife two-way switch K1 and the second hilted broadsword two-way switch K2, the first hilted broadsword two-way switch K1 and the second hilted broadsword two-way switch K2
Also contact change-over movement can not be carried out, not will cause the risk of power supply short circuit.
It is above positive "+" with first electrode, second electrode is cathode "-", using embodiment and diagram to this implementation
Example circuit and the switch operating principle of circuit are illustrated, and however, it is not limited to this when first electrode is cathode "-", and second
When electrode is positive "+", embodiments thereof and it is upper similarly.
The power supply serial and parallel switching circuit of the present embodiment can be applied to power-supply device, and the first power supply is arranged in power-supply device
BT1, second source BT2, are switched by the series/parallel of the first power supply BT1, second source BT2, need to export not according to user
With the power supply of voltage.
It is shown in Figure 10, as the preferred of the present embodiment rather than limit, it can also be the first hilted broadsword two-way switch K1's
Third power switch circuit M3 in parallel between first contact A, the second contact B, in the first contact of the second hilted broadsword two-way switch K2
A, the 4th power switch circuit M4 of parallel connection between the second contact B, makes third power switch circuit M3, the 4th power switch circuit M4
Synchronous conducting or synchronous shutdown.Its working principle is that if currently needing the output electricity of the first power supply BT1, second source BT2 parallel connection
When pressure, even if the first contact A of current first hilted broadsword two-way switch K1 and the second hilted broadsword two-way switch K2 and third are touched at this time
Point C conducting, disconnects with the second contact C, and the first power switch circuit M1 is in an off state, controls third power switch electricity at this time
Road M3, the 4th power switch circuit M4 conducting, mandatory can be switched to the first power supply BT1, second source BT2 simultaneously for circuit at this time
Connection state, voltage when external output-parallel state, meets the needs of users.
As the signal of the present embodiment, the present embodiment can be, but not limited to realize third power switch circuit using metal-oxide-semiconductor
M3, and/or the 4th power switch circuit M4, is denoted as the 4th power switch tube Q4, the 5th power switch tube Q5 respectively, optional but not
It is limited to using the opposite polarity metal-oxide-semiconductor of selection as the 4th power switch tube Q4, the 5th power switch tube Q5, as schematically shown in Figure 9,
P-type metal-oxide-semiconductor can be selected as the 4th power switch tube Q4, the positive "+" and second source BT2 of parasitic diode D4 therein
The electrical connection of positive "+", cathode "-" is electrically connected with the positive "+" of the first power supply BT1；Select N-type metal-oxide-semiconductor as the 5th power
Switching tube Q5, the positive "+" of parasitic diode D5 therein are electrically connected with the cathode "-" of second source BT2, cathode "-" and the
The cathode "-" of one power supply BT1 is electrically connected.In use, the second power switch circuit M2 of shutdown, cuts off the output of output end P0；
Equivalent circuit is as shown in Figure 10 at this time.
It is shown in Figure 11, when third power switch circuit M3, the 4th power switch circuit M4 conducting:
The current loop of first power supply BT1 is that electric current flows through the 4th power of conducting from the positive "+" of the first power supply BT1
Switching circuit M4, flows into load, and the cathode "-" through overload returns to the cathode "-" of the first power supply BT1；
The current loop of second source BT2 is that electric current flows into load, through overload from the positive "+" of second source BT2
Cathode "-", flow through the third power switch circuit M3 of conducting, return to the cathode "-" of second source BT2.
In circuit setting, the identical metal-oxide-semiconductor of internal resistance can be selected to open as third power switch circuit M3, the 4th power
Powered-down road M4, at this time when the first power supply BT1, second source BT2 parallel connection supplying power for outside, third power switch circuit M3, the 4th function
The internal resistance of rate switching circuit M4 route is completely the same, and it is identical to flow through the first power supply BT1, the electric current of second source BT2, is conducive to really
Protect the consistency of the first power supply BT1, second source BT2.In particular, using rechargeable batteries such as lithium ion battery or lead-acid batteries
When as the first power supply BT1, second source BT2, the service life of battery is conducive to extend using the technical program.
In addition, the 4th power switch tube Q4, the 5th power switch tube Q5 be using Fig. 9, circuit connecting mode shown in 10,
In parasitic diode D4, D5 be avoided that reverse current flow into the first power supply BT1, second source BT2, improve the safety of circuit
Property, improve power supply service life.
It is shown in Figure 12, it can be drawn in the present embodiment circuit multiple for exporting the first power supply BT1, second source
Voltage output end P1, P2, P3, P4 when BT2 parallel connection, to meet the various application needs of user.
In order to maximumlly facilitate application, on each voltage output end P1, P2, P3, P4 series power switch circuit S1,
S2, S3, S4, to control the voltage output of voltage output end P1, P2, P3, P4, are realized by the output of each power switch circuit
When only user needs, just in voltage output end (one of P1, P2, P3, P4 or part or all of) output voltage, otherwise
In the voltage output end Non voltage output, be conducive to the safety for improving circuit.
Wherein, power switch circuit S1, S2, S3, S4 using power switch tube realize, can also using relay or its
He realizes ordinary tap.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (10)
1. a kind of power supply serial and parallel switching circuit, characterized in that include: that the first power supply, second source, the first hilted broadsword two-way are opened
It closes, the second hilted broadsword two-way switch, the first power switch circuit；
First contact of the first hilted broadsword two-way switch is electrically connected with the first electrode of the second source, the second hilted broadsword two-way
First contact of switch is electrically connected with the second electrode of the first power supply, and the first electrode is one of positive, cathode, the
Two electrodes be it is another,
The first electrode of second contact of the first hilted broadsword two-way switch and first power supply, the second hilted broadsword two-way are opened
The second contact closed is electrically connected with the second electrode of the second source,
First power switch circuit is connected electrically in the third touching of the first hilted broadsword two-way switch, the second hilted broadsword two-way switch
Between point,
The anode of first power supply is electrically connected with the anode of voltage output end, and the cathode of the second source and the voltage are defeated
The cathode of outlet is electrically connected.
2. power supply serial and parallel switching circuit according to claim 1, characterized in that
First power switch circuit includes: the first power switch tube.
3. power supply serial and parallel switching circuit according to claim 2, characterized in that
First power switch tube is N-type metal-oxide-semiconductor, drains and is electrically connected with the third contact of the first hilted broadsword two-way switch
It connects, source electrode is electrically connected with the third contact of the second hilted broadsword two-way switch.
4. power supply serial and parallel switching circuit according to claim 2, characterized in that
First power switch circuit further include:
Second power switch tube, two switch terminals and first power switch tube are connected in series, when first power switch tube
When conducting, the second power switch tube conducting,
The parasitic diode of the current direction of the parasitic diode of second power switch tube and first power switch tube
Current direction it is opposite.
5. power supply serial and parallel switching circuit according to claim 1, characterized in that further include:
Second power switch circuit is connected electrically in first power supply and second source and is used for the power output end of external load
Between.
6. the power supply serial and parallel switching circuit stated according to claim 5, characterized in that
Second power switch circuit includes:
Third power switch tube, the cathode of the parasitic diode of the third power switch tube and the cathode of the power output end
Electrical connection, positive the second contact with the second hilted broadsword two-way switch is electrically connected.
7. the power supply serial and parallel switching circuit stated according to claim 5, characterized in that
Second power switch tube is N-type metal-oxide-semiconductor, and source electrode is electrically connected with the cathode of the power output end, drain electrode and institute
State the second contact electrical connection of the second hilted broadsword two-way switch.
8. according to claim 1 to 7 any power supply serial and parallel switching circuit, characterized in that
The first hilted broadsword two-way switch, and/or the second hilted broadsword two-way switch are as follows: relay.
9. according to claim 1 to 7 any power supply serial and parallel switching circuit, characterized in that
The electricity that component for being attracted conducting to the first contact and the second contact that control the first hilted broadsword two-way switch is powered
Source are as follows: the cathode of the anode of second source, the first power supply.
10. according to claim 1 to 7 any power supply serial and parallel switching circuit, characterized in that
The electricity that component for being attracted conducting to the first contact and the second contact that control the second hilted broadsword two-way switch is powered
Source are as follows: the cathode of the anode of second source, the first power supply.
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| CN201811052798.9A CN109066958B (en) | 2018-09-11 | 2018-09-11 | Power supply series-parallel switching circuit, switching method and power supply equipment |
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| CN201811052798.9A CN109066958B (en) | 2018-09-11 | 2018-09-11 | Power supply series-parallel switching circuit, switching method and power supply equipment |
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| CN109560798A (en) * | 2019-01-29 | 2019-04-02 | 葛文博 | Power distribution switching device based on forward and reverse on-state functional switch |
| CN115566773A (en) * | 2022-10-27 | 2023-01-03 | 西安星源博锐新能源技术有限公司 | Series-parallel connection switching circuit of vehicle charging module and vehicle charging pile |
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| CN115566773A (en) * | 2022-10-27 | 2023-01-03 | 西安星源博锐新能源技术有限公司 | Series-parallel connection switching circuit of vehicle charging module and vehicle charging pile |
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| CN109066958B (en) | 2024-03-26 |
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