CN109378876B - Power supply parallel output circuit - Google Patents
Power supply parallel output circuit Download PDFInfo
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- CN109378876B CN109378876B CN201811338394.6A CN201811338394A CN109378876B CN 109378876 B CN109378876 B CN 109378876B CN 201811338394 A CN201811338394 A CN 201811338394A CN 109378876 B CN109378876 B CN 109378876B
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- power supply
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- output circuit
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- 230000009286 beneficial effect Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 13
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
-
- 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
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a power supply parallel output circuit, which comprises: at least two power supplies, one of the arbitrary two units is marked as a first power supply, the other is marked as a second power supply, a first switch circuit is electrically connected between positive poles of the first power supply and the second power supply, a second switch circuit is electrically connected between negative poles of the first power supply and the second power supply, the positive pole of one of the first power supply and the second power supply is used as the positive pole of an output circuit, and the negative pole of the other of the first power supply and the second power supply is used as the negative pole of the output circuit. The technical scheme is beneficial to improving the consistency between the power supplies which are connected in parallel in the power supply parallel output circuit.
Description
Technical Field
The invention relates to a power supply parallel output circuit.
Background
In battery pack application, the connection relation of the batteries is often required to be switched according to the needs to meet the current application needs, and the consistency of each battery in the battery pack is a great difficulty affecting the current battery pack application.
Disclosure of Invention
One of the purposes of the embodiments of the present invention is to provide a parallel power supply output circuit, which is beneficial to improving the consistency between the parallel power supplies in the parallel power supply output circuit.
In a first aspect, an embodiment of the present invention provides a parallel power supply output circuit, including: at least two power supplies, one of the arbitrary two units is marked as a first power supply, the other is marked as a second power supply,
A first switch circuit is electrically connected between the positive poles of the first power supply and the second power supply,
A second switch circuit is electrically connected between the cathodes of the first power supply and the second power supply,
And taking the positive electrode of one of the first power supply and the second power supply as the positive electrode of the output circuit, and taking the negative electrode of the other of the first power supply and the second power supply as the negative electrode of the output circuit.
Optionally, the method further comprises:
and the third switch circuit is electrically connected with the positive electrode or the negative electrode of the power supply parallel output circuit.
Optionally, the first switching circuit includes: and the source electrode and the drain electrode of the first switch tube are respectively and electrically connected with the anodes of the first power supply and the second power supply.
Optionally, the first switching tube is a P-type switching tube,
The first switch circuit further includes: and the first impedance circuit is connected with the first switching tube in series, and when the output circuit outputs current outwards, the current direction is from the first impedance circuit to the first switching tube.
Optionally, the first impedance circuit includes: a first resistor.
Optionally, the first impedance circuit includes: a first inductor.
Optionally, the first impedance circuit includes: a first resistor and a first inductor which are connected in series.
Optionally, the second switching circuit is: and the source electrode and the drain electrode of the second switch tube are respectively and electrically connected with the anodes of the first power supply and the second power supply.
Optionally, the second switching tube is an N-type switching tube,
The second switching circuit further includes: and the second impedance circuit is connected with the second switching tube in series, and when the output circuit outputs current outwards, the current direction is from the second impedance circuit to the second switching tube.
Optionally, the second impedance circuit includes: and a second resistor.
Optionally, the second impedance circuit includes: and a second inductor.
Optionally, the second impedance circuit includes: a second resistor and a second inductor which are connected in series.
Optionally, the impedance of the first switch circuit and the impedance of the second switch circuit are the same.
Optionally, each of the power sources is a chargeable and dischargeable battery.
Therefore, by adopting the technical scheme of the embodiment, when the impedance of the first switch circuit and the impedance of the second switch circuit are set to be the same, the current flowing through any power supply is the same when the parallel output circuit outputs the current to the outside, so that the consistency of the first power supply and the second power supply is ensured.
Particularly, when rechargeable batteries such as lithium ion batteries or lead-acid batteries are used as the first power supply and the second power supply, the technical scheme is beneficial to prolonging the service life of the batteries.
Drawings
The accompanying drawings are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification.
Fig. 1 is a schematic diagram of a first power supply parallel output circuit according to embodiment 1 of the present invention;
Fig. 2 is a schematic diagram of a second power supply parallel output circuit according to embodiment 1 of the present invention;
Fig. 3 is a schematic diagram of a third power supply parallel output circuit according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of a fourth power supply parallel output circuit according to embodiment 1 of the present invention;
Fig. 5 is a schematic diagram of a fifth power supply parallel output circuit according to embodiment 1 of the present invention;
Fig. 6 is a schematic diagram of a sixth power supply parallel output circuit according to embodiment 1 of the present invention;
fig. 7 is a schematic diagram of a seventh power supply parallel output circuit according to embodiment 1 of the present invention;
fig. 8 is a schematic diagram of an eighth power supply parallel output circuit according to embodiment 1 of the present invention;
fig. 9 is a schematic diagram of a ninth power supply parallel output circuit according to embodiment 1 of the present invention;
Fig. 10 is a schematic diagram of a tenth power supply parallel output circuit according to embodiment 1 of the present invention;
fig. 11 is a schematic diagram of a circuit topology principle of outputting current by three power sources connected in parallel to each other according to embodiment 1 of the present invention.
Detailed Description
The present invention will now be described in detail with reference to the drawings and the specific embodiments thereof, wherein the exemplary embodiments and descriptions of the present invention are provided for illustration of the invention and are not intended to be limiting.
Example 1
Referring to fig. 1 and 2, the present embodiment provides a parallel power supply output circuit, which mainly includes: at least two power supplies, for convenience of description, one of any two power supplies will be referred to as a first power supply BT1 and the other as a second power supply BT2.
For any first power supply BT1 and second power supply BT2, the first switch circuit M1 is electrically connected between their positive poles "+", the second switch circuit M2 is electrically connected between their negative poles "-", the positive pole "+", which is one of the first power supply BT1 and the second power supply BT2, of the output circuit is led out, as the positive pole "+", of the power supply parallel output circuit of this embodiment, and the negative pole "-", which is the other of the first power supply BT1 and the second power supply BT2, of the output circuit is led out, as the negative pole "-", of the power supply parallel output circuit of this embodiment.
Such as: as shown in fig. 1, the positive electrode "+" of the output circuit is led out from the positive electrode "+" of the first power BT1, the negative electrode "-" of the output circuit is led out from the negative electrode "-" of the second power BT2, when the first power BT1 and the second power BT2 are connected in parallel, the first switch circuit M1 and the second switch circuit M2 are respectively turned on, after the two ends of the output circuit are connected with loads, the current I1 flowing out from the positive electrode "+" of the first power BT1 flows back to the negative electrode "-" of the first power BT1 after passing through the loads and the second switch circuit M2, so as to form a current loop; the current I2 flowing from the positive electrode "+" of the second power BT2 flows back to the negative electrode "-" of the first power BT1 after passing through the first switch circuit M1 and the load, forming a current loop.
Such as: as shown in fig. 2, the negative electrode "-" of the output circuit is led out from the negative electrode "-" end of the first power BT1, the positive electrode "+" of the output circuit is led out from the positive electrode "+" end of the second power BT2, when the first power BT1 and the second power BT2 are connected in parallel, the first switch circuit M1 and the second switch circuit M2 are respectively turned on, and when the load is connected to the two ends of the output circuit, the current I1' flowing out from the positive electrode "+" of the first power BT1 flows back to the negative electrode "-" of the first power BT1 after passing through the load and the second switch circuit M2, so as to form a current loop; the current I2' flowing from the positive electrode "+" of the second power BT2 flows back to the negative electrode "-" of the first power BT1 after passing through the first switch circuit M1 and the load, forming a current loop.
As can be seen from fig. 1 and 2, when the impedances of the first switch circuit M1 and the second switch circuit M2 are the same, the currents I1 and I2 flowing through the first power BT1 and the second power BT2 are the same, which is beneficial to ensuring the consistency of the first power BT1 and the second power BT 2. Particularly, when rechargeable batteries such as lithium ion batteries or lead-acid batteries are used as the first power supply BT1 and the second power supply BT2, the technical scheme is beneficial to prolonging the service life of the batteries.
Referring to fig. 3 and 4, a third switch circuit M3 is further provided at the positive "+" or negative "-" end of the output circuit to control the connection between the parallel power output circuit and the external load, so as to further improve the application convenience of the circuit, for example, when the third switch circuit M3 is turned off, the first switch circuit M1 and the second switch circuit M2 are controlled to be turned on, and after the first switch circuit M1 and the second switch circuit M2 are both turned on to ensure that the parallel power connection is realized, the third switch circuit M3 is turned on, and the parallel output current is output to the external load; when the circuit is turned off, the third switching circuit M3 is turned off to disconnect the load, and then the first switching circuit M1 and the second switching circuit M2 are turned off. Compared with the technical scheme without the third switch, the technical scheme is beneficial to avoiding the situation that the circuit possibly outputs a power supply or partial power supply parallel current to the load when the first switch circuit M1 and the second switch circuit M2 cannot be simultaneously turned on or turned off, so that the technical scheme is beneficial to realizing effective control of circuit output.
The first switch circuit M1, the second switch circuit M2, and the third switch circuit M3 of the present embodiment may be implemented by using controllable switches in the prior art.
As an illustration of this embodiment, the first switch circuit M1, the second switch circuit M2, and the third switch circuit M3 of this embodiment may be implemented by using semiconductor switch tubes, and as shown in fig. 1-4, MOS switch tubes are respectively used to implement the first switch circuit M1, the second switch circuit M2, and the third switch circuit M3, where the MOS switch tubes are respectively recorded as a first switch tube Q1, a second switch tube Q2, and a third switch tube Q3. The adoption of the switching tube is beneficial to improving the switching reaction speed during switching of the switch and avoiding the arc phenomenon during switching of the switch.
For example, referring to fig. 1 to 4, in this embodiment, a P-type MOS suitable for high voltage end driving is used as the first switching tube Q1, the source electrode "S" thereof is electrically connected to the positive electrode "+" of the first power BT1, the drain electrode "D" thereof is electrically connected to the positive electrode "+" of the second power BT2, and the gate electrode "G" of the first switching tube Q1 is inputted with a first switching control signal, so that when the gate-source voltage VGS of the first switching tube Q1 is smaller than the on threshold voltage of the first switching tube Q1, the first switching tube Q1 is turned on.
For example, referring to fig. 1 to 4, in this embodiment, an N-type MOS transistor suitable for low-voltage end driving is used as the second switching transistor Q2, the source "S" thereof is electrically connected to the negative electrode "-" of the second power BT2, the drain "D" thereof is electrically connected to the negative electrode "-" of the first power BT1, the gate "G" of the second switching transistor Q2 is input with the second switching control signal, and the gate "G" of the second switching transistor Q2 is input with the second switching control signal, so that when the gate-source voltage VGS of the second switching transistor Q2 is greater than the turn-on threshold voltage of a certain second switching transistor Q2, the second switching transistor Q2 is turned on.
Referring to fig. 5 to 6, the first switching circuit M1 may further include: the first impedance circuit Z1 connected in series with the front end of the first switching tube Q1 enables current to pass through the first impedance circuit Z1 before reaching the first switching tube Q1 when the output circuit generates current. When the front load is short-circuited, referring to the equivalent circuit diagram shown in fig. 6, the current at the moment of short-circuit is increased relative to the current before short-circuit, namely, the voltage at the two ends of the first impedance circuit Z1 is increased, so that the voltage of the source electrode S of the first switching tube Q1 is reduced relative to the voltage of the source electrode S of the first switching tube Q1 when the load is not short-circuited, and the gate-source voltage VGs of the first switching tube Q1 is increased under the condition that the control signal input to the gate electrode G is still a conduction control signal when the load is not short-circuited even though the control signal is still the conduction control signal VG is unchanged, and the gate-source voltage VGs of the first switching tube Q1 is larger than the conduction threshold voltage of the first switching tube Q1, so that the first switching tube Q1 is forcibly turned off.
Referring to fig. 5 to 6, similarly to the first switching circuit M1, the second switching circuit M2 may further include: the second impedance circuit Z2 connected in series with the front end of the second switching tube Q2 enables the current to pass through the second impedance circuit Z2 before reaching the second switching tube Q2 when the output circuit generates the current. When the front load is short-circuited, referring to the equivalent circuit diagram shown in fig. 6, the current at the moment of short-circuit is increased relative to the current before short-circuit, namely, the two ends of the second impedance circuit Z2 are increased, so that the voltage of the source electrode S of the second switching tube Q2 is increased relative to the voltage of the source electrode S of the second switching tube Q2 when the load is not short-circuited, and the gate-source voltage VGs of the second switching tube Q2 is reduced under the condition that the control signal input to the gate electrode G is still a conduction control signal when the load is not short-circuited and VG is unchanged, the gate-source voltage VGs of the first switching tube Q1 is smaller than the conduction threshold voltage thereof, and the second switching tube Q2 is forcibly turned off, therefore, by adopting the technical scheme of the embodiment, the second impedance circuit Z2 is connected in series at the front end of the second switching tube Q2, the second switching tube Q2 can be forcibly turned off under the abnormal condition of the load short-circuit, the large short-circuit current is prevented from entering the power supply, and the protection of the power supply is facilitated.
As an illustration of the present embodiment, the first impedance circuit Z1 and the second impedance circuit Z2 may be implemented by, but not limited to, using a first resistor R1 and a second resistor R2, respectively.
Referring to fig. 7-8, the first impedance circuit Z1 and the second impedance circuit Z2 in this embodiment may be further implemented by a first inductor and a second inductor, respectively, and in the moment of load short-circuit, voltages at two ends of the first inductor and the second inductor reach very high instantly, so that the source electrode "S" voltage of the first switch tube Q1 can be raised instantly, the first switch tube Q1 can be turned off instantly, the source electrode "S" voltage of the second switch tube Q2 can be pulled down instantly, the second switch tube Q2 can be turned off instantly, the response speed of the currents of the first switch circuit M1 and the second switch circuit M2 can be forced to be turned off when the load short-circuit is raised, and the safety is further improved.
Referring to fig. 9 to 10, as an illustration of the present embodiment, the first impedance circuit Z1 and the second impedance circuit Z2 of the present embodiment may further be respectively formed by serially connecting a first resistor and a first inductor, and serially connecting a second resistor and a second inductor.
It should be noted that, the first power BT1 and the second power BT2 in this embodiment refer to any two power sources connected in parallel in the battery pack, that is, the technical solution of this embodiment is not only applicable to a parallel output circuit formed by two power sources, but also applicable to a parallel output circuit formed by more than two groups of power sources. The circuit connection relationship of any two power supplies in the circuit is the same as that of the first power supply BT1 and the second power supply BT2 in the embodiment, and the connection circuits between the positive poles "+" and the negative poles "-" of any two power supplies are the same as those of the first power supply BT1 and the second power supply BT2 in the embodiment.
Referring to fig. 11, as an illustration of the present embodiment, the present embodiment shows a parallel output circuit including three power supplies.
As can be seen from fig. 11, the connection relationship between the third power BT3 and the second power BT2 is the same as the connection relationship between the first power BT1 and the first power BT2, and the connection relationship between the third power BT3 and the first power BT1 is the same as the connection relationship between the first power BT1 and the second power BT 2. Starting from fig. 11, those skilled in the art can analogize a circuit structure including four, five or even more power supplies to form a parallel circuit and output a parallel current to the outside, which is not described herein.
The above-described embodiments do not limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the above embodiments should be included in the scope of the present invention.
Claims (10)
1. A parallel power output circuit, comprising: at least two power supplies, one of the arbitrary two units is marked as a first power supply, the other is marked as a second power supply,
A first switch circuit is electrically connected between the positive poles of the first power supply and the second power supply, and the first switch circuit comprises: the first switching tube is a P-type switching tube, the source electrode and the drain electrode are respectively and electrically connected with the anodes of the first power supply and the second power supply, and the first switching circuit further comprises: the first impedance circuit is connected with the first switching tube in series, and when the output circuit outputs current outwards, the current direction is from the first impedance circuit to the first switching tube;
The second switching circuit comprises a second switching tube, an N-type switching tube, a source electrode and a drain electrode, wherein the second switching tube is electrically connected between the cathodes of the first power supply and the second power supply, the source electrode and the drain electrode are respectively and electrically connected with the anodes of the first power supply and the second power supply, and the second switching circuit further comprises: the second impedance circuit is connected with the second switching tube in series, and when the output circuit outputs current outwards, the current direction is from the second impedance circuit to the second switching tube;
And taking the positive electrode of one of the first power supply and the second power supply as the positive electrode of the output circuit, and taking the negative electrode of the other of the first power supply and the second power supply as the negative electrode of the output circuit.
2. The power supply parallel output circuit according to claim 1, further comprising:
and the third switch circuit is electrically connected with the positive electrode or the negative electrode of the power supply parallel output circuit.
3. The power supply parallel output circuit according to claim 1, wherein,
The first impedance circuit includes: a first resistor.
4. The power supply parallel output circuit according to claim 1, wherein,
The first impedance circuit includes: a first inductor.
5. The power supply parallel output circuit according to claim 1, wherein,
The first impedance circuit includes: a first resistor and a first inductor which are connected in series.
6. The power supply parallel output circuit according to claim 1, wherein,
The second impedance circuit includes: and a second resistor.
7. The power supply parallel output circuit according to claim 1, wherein,
The second impedance circuit includes: and a second inductor.
8. The power supply parallel output circuit according to claim 1, wherein,
The second impedance circuit includes: a second resistor and a second inductor which are connected in series.
9. A power supply parallel output circuit according to any one of claims 1 to 8, wherein,
The impedance of the first switch circuit and the impedance of the second switch circuit are the same.
10. A power supply parallel output circuit according to any one of claims 1 to 8, wherein,
Each power supply is a chargeable and dischargeable battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811338394.6A CN109378876B (en) | 2018-11-12 | 2018-11-12 | Power supply parallel output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811338394.6A CN109378876B (en) | 2018-11-12 | 2018-11-12 | Power supply parallel output circuit |
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| Publication Number | Publication Date |
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| CN109378876A CN109378876A (en) | 2019-02-22 |
| CN109378876B true CN109378876B (en) | 2024-06-04 |
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| CN201811338394.6A Active CN109378876B (en) | 2018-11-12 | 2018-11-12 | Power supply parallel output circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110635469B (en) * | 2019-10-12 | 2021-11-09 | 深圳市爱兰博功率电子有限公司 | Parallel power expansion circuit and method |
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| CN106253842A (en) * | 2016-09-07 | 2016-12-21 | 华南理工大学 | Photovoltaic cell connection in series-parallel automatic switch-over circuit and method |
| CN106300962A (en) * | 2016-08-08 | 2017-01-04 | 杰华特微电子（杭州）有限公司 | A kind of self-powered control circuit |
| WO2018036556A1 (en) * | 2016-08-26 | 2018-03-01 | 常州聚为智能科技有限公司 | Electronic cigarette power supply circuit |
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| CN209046307U (en) * | 2018-11-12 | 2019-06-28 | 深圳市格瑞普智能电子有限公司 | Power sources in parallel output circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7808131B2 (en) * | 2006-10-12 | 2010-10-05 | Xtreme Power Inc. | Precision battery pack circuits |
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2018
- 2018-11-12 CN CN201811338394.6A patent/CN109378876B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300962A (en) * | 2016-08-08 | 2017-01-04 | 杰华特微电子（杭州）有限公司 | A kind of self-powered control circuit |
| WO2018036556A1 (en) * | 2016-08-26 | 2018-03-01 | 常州聚为智能科技有限公司 | Electronic cigarette power supply circuit |
| CN106253842A (en) * | 2016-09-07 | 2016-12-21 | 华南理工大学 | Photovoltaic cell connection in series-parallel automatic switch-over circuit and method |
| CN207216350U (en) * | 2017-09-01 | 2018-04-10 | 厦门马恒达汽车零部件有限公司 | A kind of high voltage power distribution controller of low-power consumption |
| CN209046307U (en) * | 2018-11-12 | 2019-06-28 | 深圳市格瑞普智能电子有限公司 | Power sources in parallel output circuit |
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