CN112564265A - Power supply switching circuit - Google Patents
Power supply switching circuit Download PDFInfo
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- CN112564265A CN112564265A CN202011463839.0A CN202011463839A CN112564265A CN 112564265 A CN112564265 A CN 112564265A CN 202011463839 A CN202011463839 A CN 202011463839A CN 112564265 A CN112564265 A CN 112564265A
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- power supply
- module
- input interface
- switch
- interface
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- 238000002955 isolation Methods 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000004044 response Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- 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
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- 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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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a power supply switching circuit, which comprises an input interface, an output interface, an inversion module, an isolation module and a standby battery, wherein the input interface is connected with the output interface; the input interface is connected with an external power supply, the input end of the inversion module is connected with the input interface, the inversion module is connected with the standby battery through the isolation module, the output end of the inversion module is connected with the output interface, and the output interface is connected with an external load. The invention provides a standby battery, which is characterized in that an input interface is connected with an external power supply, the input end of an inverter module is connected with the input interface, a working signal for controlling the inverter module is converted according to a voltage or current signal of the input interface, and the working state of the standby battery is determined according to the working signal. The standby battery can be quickly switched according to the working condition of the external power supply without occupying an I/O interface of a digital chip, and the circuit switching response time of most of the standby batteries is met.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a power supply switching circuit.
Background
At present, various uninterrupted electric equipment exists in places such as machine rooms and hospitals, and therefore, a power supply unit is required to perform uninterrupted power configuration service, so that the requirement of uninterrupted protection of load power supply can be met, and the reliability of power supply is improved.
Therefore, a backup power supply is generally provided, and power is supplied by switching to the backup power supply through the power supply switching circuit in the case of an abnormality in the power supply unit. However, the conventional power switching circuit generally needs to use an I/O interface of a digital chip to detect the power supply condition of the power supply unit, and drive the standby power supply to start supplying power through the driving circuit. Therefore, the time for switching the power supply is long, limited I/O interfaces and design driving circuits on a digital chip are occupied, the hardware cost is increased, and the existing requirements cannot be met.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a power supply switching circuit, which can quickly switch a standby battery according to the working condition of an external power supply without occupying an I/O interface of a digital chip, and meets the circuit switching response time of most of standby batteries.
One of the purposes of the invention is realized by adopting the following technical scheme:
a power supply switching circuit comprises an input interface, an output interface, an inversion module, an isolation module and a standby battery; the input interface is connected with an external power supply, the input end of the inversion module is connected with the input interface, the inversion module is connected with the standby battery through the isolation module, the output end of the inversion module is connected with the output interface, and the output interface is connected with an external load.
Further, the BUCK module comprises a capacitor C2, an inductor L7, a switch S7 and a switch S10; one end of the capacitor C2 is connected with the inductor L7 and the isolation module, and the other end of the capacitor C2 is connected with the switch S10 and the isolation module; one end of the inductor L7 is connected to the switch S7 and the switch S10, respectively.
Further, the inverter module is a bridge inverter circuit.
Further, the isolation module is an LLC circuit.
Further, the external power supply is an alternating current power supply or a direct current power supply, and a switch is arranged between the external power supply and the input interface.
Further, the backup battery is a BMS power supply unit.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a power supply switching circuit, wherein an input interface is connected with an external power supply, the input end of an inverter module is connected with the input interface, the input interface is converted into a working signal for controlling the inverter module according to a voltage or current signal of the input interface, and the working state of a standby battery is determined according to the working signal. The standby battery can be quickly switched according to the working condition of the external power supply without occupying an I/O interface of a digital chip, and the circuit switching response time of most of the standby batteries is met.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
As shown in fig. 1, the present invention provides a power switching circuit, which can be incorporated into an existing power circuit. When an external power supply circuit is abnormal, the standby battery can be quickly switched, the circuit switching response time of most of the standby batteries is met, and the influence on an external load is reduced.
Specifically, the power switching circuit comprises an input interface, an output interface, an inverter module, an isolation module and a standby battery; the input interface is connected with an external power supply, the input end of the inversion module is connected with the input interface, the inversion module is connected with the standby battery through the isolation module, the output end of the inversion module is connected with the output interface, and the output interface is connected with an external load.
The input interface is connected with an external power supply, and can be a direct current power supply or an alternating current power supply. In order to facilitate control, a switch is further arranged between the external power supply and the input interface, and the switch can be a diode or a switch tube. The external load connected to the output interface may be an external controller or an electric device, and is not limited herein. The input end of the inversion module is connected with the input interface and is used for receiving an output voltage signal or a current signal of the external power supply and converting the output voltage signal or the current signal into a control signal for controlling the working state of the standby battery. And the output end of the inverter module is connected with the output interface and is used for outputting the standby battery. The power supply switching circuit directly controls the working state of the standby battery by the voltage signal or the current signal output by the external power supply, so that the process of signal acquisition and analysis is not needed, an I/O (input/output) interface of a digital chip is not needed, the driving power of a control signal is not needed to be increased by a driving circuit, and the hardware cost is reduced.
Specifically, the inverter module is a bridge inverter circuit, and the bridge inverter circuit is formed by a switch S5, a switch S6, a switch S8 and a switch S9. The switch S5, the switch S6, the switch S8 and the switch S9 are diodes, the switch S6 is connected in series with the switch S9, and the switch S5 is connected in series with the switch S8, and the on and off of the inverter module are controlled by a voltage signal of an input interface connected with the switch S3583, so that a voltage signal of an external power supply connected with the input interface is converted into a control signal for controlling the working state of the backup battery.
A BUCK module is arranged between the inverter module and the isolation module, and comprises a capacitor C2, an inductor L7, a switch S7 and a switch S10; one end of the capacitor C2 is connected with the inductor L7 and the isolation module, and the other end of the capacitor C2 is connected with the switch S10 and the isolation module; one end of the inductor L7 is connected to the switch S7 and the switch S10, respectively, and the switch S10 and the switch S7 are diodes or switching tubes. The BUCK module is matched with the inversion module to monitor the change of the output voltage in real time.
An isolation module is further arranged in the power supply switching circuit, and the isolation module is an LLC circuit. A resonant inductor, a resonant capacitor and an excitation inductor are arranged in the LLC circuit to form a resonant network, and the purpose of voltage stabilization is achieved through frequency conversion. More, the spare battery adopts a BMS (battery management system) power supply unit, so that the service state of the battery can be monitored at any time, and the service of the battery is guaranteed.
The invention provides a power supply switching circuit, wherein an input interface is connected with an external power supply, the input end of an inverter module is connected with the input interface, the input interface is converted into a working signal for controlling the inverter module according to a voltage or current signal of the input interface, and the working state of a standby battery is determined according to the working signal. The standby battery can be switched within 3 seconds according to the working condition of the external power supply without occupying an I/O interface of a digital chip, and the circuit switching response time of most of the standby batteries is met.
The device and the modules and sub-modules in the terminal in the embodiments of the present application can be combined, divided and deleted according to actual needs.
The modules or sub-modules described as separate parts may or may not be physically separate, and parts that are modules or sub-modules may or may not be physical modules or sub-modules, may be located in one place, or may be distributed over a plurality of network modules or sub-modules. Some or all of the modules or sub-modules can be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, each functional module or sub-module in the embodiments of the present application may be integrated into one processing module, or each module or sub-module may exist alone physically, or two or more modules or sub-modules may be integrated into one module. The integrated modules or sub-modules may be implemented in the form of hardware, or may be implemented in the form of software functional modules or sub-modules.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (6)
1. A power supply switching circuit is characterized by comprising an input interface, an output interface, an inverter module, an isolation module and a standby battery; the input interface is connected with an external power supply, the input end of the inversion module is connected with the input interface, the inversion module is connected with the standby battery through the isolation module, the output end of the inversion module is connected with the output interface, and the output interface is connected with an external load.
2. The power switching circuit of claim 1, further comprising a BUCK module, said BUCK module comprising a capacitor C2, an inductor L7, a switch S7, a switch S10; one end of the capacitor C2 is connected with the inductor L7 and the isolation module, and the other end of the capacitor C2 is connected with the switch S10 and the isolation module; one end of the inductor L7 is connected to the switch S7 and the switch S10, respectively.
3. The power switching circuit according to claim 2, wherein the inverter module is a bridge inverter circuit.
4. The power switching circuit of claim 2, wherein said isolation module is an LLC circuit.
5. The power switching circuit according to claim 2, wherein the external power source is an ac power source or a dc power source, and a switch is provided between the external power source and the input interface.
6. The power switching circuit of claim 5, wherein the backup battery is a BMS power supply unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463839.0A CN112564265A (en) | 2020-12-10 | 2020-12-10 | Power supply switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463839.0A CN112564265A (en) | 2020-12-10 | 2020-12-10 | Power supply switching circuit |
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| Publication Number | Publication Date |
|---|---|
| CN112564265A true CN112564265A (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011463839.0A Pending CN112564265A (en) | 2020-12-10 | 2020-12-10 | Power supply switching circuit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723744A (en) * | 2011-03-29 | 2012-10-10 | 力博特公司 | UPS module and UPS system |
| CN108011395A (en) * | 2017-12-11 | 2018-05-08 | 江苏辉伦太阳能科技有限公司 | The control method of charging and discharging circuit automatic optimal in a kind of mixing inverter |
| FR3082683A1 (en) * | 2018-06-13 | 2019-12-20 | Valeo Siemens Eautomotive France Sas | BIDIRECTIONAL CONVERTER FOR ELECTRIC OR HYBRID VEHICLE |
| CN111660844A (en) * | 2020-06-10 | 2020-09-15 | 中国矿业大学 | Plug-in electric automobile three-phase integrates on-vehicle charging system |
| CN214429313U (en) * | 2020-12-10 | 2021-10-19 | 深圳市瑞能时代科技有限公司 | Power supply switching circuit |
-
2020
- 2020-12-10 CN CN202011463839.0A patent/CN112564265A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723744A (en) * | 2011-03-29 | 2012-10-10 | 力博特公司 | UPS module and UPS system |
| CN108011395A (en) * | 2017-12-11 | 2018-05-08 | 江苏辉伦太阳能科技有限公司 | The control method of charging and discharging circuit automatic optimal in a kind of mixing inverter |
| FR3082683A1 (en) * | 2018-06-13 | 2019-12-20 | Valeo Siemens Eautomotive France Sas | BIDIRECTIONAL CONVERTER FOR ELECTRIC OR HYBRID VEHICLE |
| CN111660844A (en) * | 2020-06-10 | 2020-09-15 | 中国矿业大学 | Plug-in electric automobile three-phase integrates on-vehicle charging system |
| CN214429313U (en) * | 2020-12-10 | 2021-10-19 | 深圳市瑞能时代科技有限公司 | Power supply switching circuit |
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