CN219477641U - Bidirectional charger - Google Patents
Bidirectional charger Download PDFInfo
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- CN219477641U CN219477641U CN202320631287.2U CN202320631287U CN219477641U CN 219477641 U CN219477641 U CN 219477641U CN 202320631287 U CN202320631287 U CN 202320631287U CN 219477641 U CN219477641 U CN 219477641U
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- circuit
- power supply
- energy storage
- mcu
- storage power
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application provides a bidirectional charger for connect external battery and energy storage power supply, bidirectional charger includes main circuit and control circuit, main circuit includes input protection circuit, BUCK-BOOST circuit and output protection circuit, external battery loops through input protection circuit, BUCK-BOOST circuit, output protection circuit connects energy storage power supply, control circuit includes MCU and isolation communication circuit, MCU connects energy storage power supply through isolation communication circuit, and feed back drive signal to BUCK-BOOST circuit, auxiliary power supply gets the electricity from energy storage power supply, and provide the power for MCU and isolation communication circuit. The bidirectional charger provided by the utility model can realize that different external batteries supply power to the energy storage power supply, accurately control the charge and discharge voltage of the batteries, and simultaneously can detect the electric quantity of the energy storage power supply in real time through communication with the energy storage power supply, and reversely charge the external batteries under the condition that the energy storage power supply is full and has external input.
Description
Technical Field
The application relates to the field of chargers, in particular to a bidirectional charger.
Background
With the development of the energy storage power supply, the requirements of users on the cruising performance and the output power of the energy storage power supply are higher and higher, and the capacity of the energy storage power supply is also larger and larger. With the increase of the capacity of the built-in battery of the energy storage power supply, the user gradually discards the traditional lead-acid battery and changes the traditional lead-acid battery into a lithium battery with high power density. However, even this cannot meet the needs of some users, and only an external battery can be used to increase the capacity of the energy storage power supply.
Therefore, it is necessary to propose a bidirectional charger applied to intelligence for the above-mentioned problems.
Disclosure of Invention
The purpose of the application is to provide a bidirectional charger.
In order to achieve the above object, the present application provides the following technical solutions:
the bidirectional charger comprises a main circuit and a control circuit, wherein the main circuit comprises an input protection circuit, a BUCK-BOOST circuit and an output protection circuit, the external battery is connected with the energy storage power supply through the input protection circuit, the BUCK-BOOST circuit and the output protection circuit in sequence, the control circuit comprises an MCU, an auxiliary power supply and an isolation communication circuit, the MCU is connected with the energy storage power supply through the isolation communication circuit and feeds back a driving signal to the BUCK-BOOST circuit, and the auxiliary power supply is powered from the energy storage power supply and provides power for the MCU and the isolation communication circuit.
Further, the input protection circuit comprises a fuse F1 and a relay K1, and the external battery is connected with the protection relay K1 through the fuse F1.
Further, the BUCK-BOOST circuit comprises a switching tube Q1, a switching tube Q2, a switching tube Q3, a switching tube Q4 and an inductor L1, wherein the center points of the switching tube Q2 and the switching tube Q3 and the center points of the switching tube Q1 and the switching tube Q4 are respectively connected with the inductor L1.
Further, the output protection circuit includes a fuse F2, and the fuse F2 is connected to an energy storage power source.
Further, the control circuit further comprises a sampling circuit, an intelligent judging circuit, a driving module, a temperature protection circuit and an isolation communication circuit, the external battery is connected with the MCU through the sampling circuit, the BUCK-BOOST circuit is connected with the MCU through the sampling circuit, the external battery is connected with the MCU through the intelligent judging circuit, the MCU is connected with the BUCK-BOOST circuit through the driving module, the MCU is connected with an energy storage power supply through the isolation communication circuit, and the BUCK-BOOST circuit is connected with the MCU through the temperature protection circuit.
Further, the model of the MCU is DSPIC33CK128MP205T-I/PT.
The beneficial effects of this application are:
the bidirectional charger provided by the utility model can realize that different external batteries supply power to the energy storage power supply, accurately control the charge and discharge voltage of the batteries, simultaneously can detect the electric quantity of the energy storage power supply in real time through communication with the energy storage power supply, reversely charges the external batteries under the condition that the energy storage power supply is full of electricity and has external input, can intelligently judge the type of the external batteries, and has the advantages of high efficiency, bidirectional energy output, high power level, high dynamic performance and steady state performance index. This is a problem to a certain extent that most external batteries in the market today are not able to supply energy storage power sources of different voltage classes.
Drawings
FIG. 1 is a block schematic diagram of a bi-directional charger according to one embodiment of the present application;
FIG. 2 is a circuit diagram of a bi-directional charger according to an embodiment of the present application;
Detailed Description
The terminology used in the description of the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application, as will be described in detail with reference to the accompanying drawings.
As shown in FIG. 1, the bidirectional charger is used for connecting an external battery and an energy storage power supply, the bidirectional charger comprises a main circuit and a control circuit, the main circuit comprises an input protection circuit, a BUCK-BOOST circuit and an output protection circuit, the external battery is connected with the energy storage power supply through the input protection circuit, the BUCK-BOOST circuit and the output protection circuit in sequence, the control circuit comprises an MCU, an auxiliary power supply and an isolation communication circuit, the MCU is connected with the energy storage power supply through the isolation communication circuit and feeds back a driving signal to the BUCK-BOOST circuit, and the auxiliary power supply takes power from the energy storage power supply and provides power for the MCU and the isolation communication circuit. The bidirectional charger provided by the utility model can realize that different external batteries supply power to the energy storage power supply, accurately control the charge and discharge voltage of the batteries, simultaneously can detect the electric quantity of the energy storage power supply in real time through communication with the energy storage power supply, reversely charges the external batteries under the condition that the energy storage power supply is full of electricity and has external input, can intelligently judge the type of the external batteries, and has the advantages of high efficiency, bidirectional energy output, high power level, high dynamic performance and steady state performance index. This is a problem to a certain extent that most external batteries in the market today are not able to supply energy storage power sources of different voltage classes.
The external battery in this embodiment may be a 12V/24V/48V lead-acid battery, and the energy storage power source may be 16 strings of 4 parallel, 51.2V,4000wh for example, and the main circuit parameters mainly include a protection circuit parameter, an inductance parameter, and a switching tube parameter.
As shown in fig. 2, in the present embodiment, the input protection circuit includes a fuse F1 and a relay K1, and the external battery is connected to the protection relay K1 through the fuse F1.
In this embodiment, the BUCK-BOOST circuit includes a switching tube Q1, a switching tube Q2, a switching tube Q3, a switching tube Q4, and an inductor L1, where the center points of the switching tube Q2 and the switching tube Q3 and the center points of the switching tube Q1 and the switching tube Q4 are respectively connected with the inductor L1.
In this embodiment, the output protection circuit includes a fuse F2, and the fuse F2 is connected to the energy storage power source.
In this embodiment, the control circuit further includes a sampling circuit, an intelligent judging circuit, a driving module and an isolation communication circuit, the external battery is connected with the MCU through the sampling circuit, the BUCK-BOOST circuit is connected with the MCU through the sampling circuit, the external battery is connected with the MCU through the intelligent judging circuit, the MCU is connected with the BUCK-BOOST circuit through the driving module, the MCU is connected with the energy storage power supply through the isolation communication circuit, and the BUCK-BOOST circuit is connected with the MCU through the temperature protection circuit.
The sampling circuit includes an output voltage current sample and an input voltage current sample.
The intelligent judging circuit can automatically identify the type of the input battery and further control the charge and discharge voltage of the external battery.
The driving module is a PWM controller, and adopts a digital control technology according to the sampled voltage and current, so that the accurate control of the voltage and current is realized, and the process requirements of charging and discharging of the battery are ensured.
The isolation communication circuit comprises a 485 communication circuit which is communicated with the energy storage power supply in real time so as to confirm the current state of the energy storage power supply and further realize the bidirectional charging function.
The protection circuit comprises an output overcurrent, an output overvoltage, an input overcurrent, an input overvoltage, an input undervoltage and an over-temperature protection circuit.
In the embodiment, the MCU is of the type DSPIC33CK128MP205T-I/PT, and the chip has the advantages of high precision, low power consumption, high performance, large data storage capacity and the like, and can provide complete software and hardware control and protection for the bidirectional charger.
In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, indirectly connected through an intermediary, or may be in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
The embodiments or implications herein must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the embodiments herein. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more, unless specifically stated otherwise.
The terms first, second, third, fourth and the like in the description and in the claims of embodiments of the application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented, for example, in sequences other than those illustrated or described herein. Furthermore, the terms "may include" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the foregoing embodiments are merely illustrative of the technical solutions of the embodiments of the present application, and are not limiting thereof. Although embodiments of the present application have been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments may be modified or some or all of the technical features may be replaced with equivalents. Such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (6)
1. The utility model provides a two-way charger for connect external battery and energy storage power, its characterized in that: the bidirectional charger comprises a main circuit and a control circuit, wherein the main circuit comprises an input protection circuit, a BUCK-BOOST circuit and an output protection circuit, the external battery is connected with an energy storage power supply through the input protection circuit, the BUCK-BOOST circuit and the output protection circuit in sequence, the control circuit comprises an MCU, an auxiliary power supply and an isolation communication circuit, the MCU is connected with the energy storage power supply through the isolation communication circuit and feeds back a driving signal to the BUCK-BOOST circuit, and the auxiliary power supply takes power from the energy storage power supply and provides power for the MCU and the isolation communication circuit.
2. A bi-directional charger as defined in claim 1, wherein: the input protection circuit comprises a fuse F1 and a relay K1, and the external battery is connected with the protection relay K1 through the fuse F1.
3. A bi-directional charger as defined in claim 1, wherein: the BUCK-BOOST circuit comprises a switching tube Q1, a switching tube Q2, a switching tube Q3, a switching tube Q4 and an inductor L1, wherein the center points of the switching tube Q2 and the switching tube Q3 and the center points of the switching tube Q1 and the switching tube Q4 are respectively connected with the inductor L1.
4. A bi-directional charger as defined in claim 1, wherein: the output protection circuit comprises a fuse F2, wherein the fuse F2 is connected to an energy storage power supply.
5. A bi-directional charger as defined in claim 1, wherein: the control circuit further comprises a sampling circuit, an intelligent judging circuit, a driving module, a temperature protection circuit and an isolation communication circuit, wherein the external battery is connected with the MCU through the sampling circuit, the BUCK-BOOST circuit is connected with the MCU through the sampling circuit, the external battery is connected with the MCU through the intelligent judging circuit, the MCU is connected with the BUCK-BOOST circuit through the driving module, the MCU is connected with an energy storage power supply through the isolation communication circuit, and the BUCK-BOOST circuit is connected with the MCU through the temperature protection circuit.
6. A bi-directional charger as defined in claim 1, wherein: the MCU is of the type DSPIC33CK128MP205T-I/PT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320631287.2U CN219477641U (en) | 2023-03-28 | 2023-03-28 | Bidirectional charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320631287.2U CN219477641U (en) | 2023-03-28 | 2023-03-28 | Bidirectional charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219477641U true CN219477641U (en) | 2023-08-04 |
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ID=87435469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320631287.2U Active CN219477641U (en) | 2023-03-28 | 2023-03-28 | Bidirectional charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219477641U (en) |
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2023
- 2023-03-28 CN CN202320631287.2U patent/CN219477641U/en active Active
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