CN116111671A - Single-interface charge-discharge circuit and energy storage device - Google Patents

Single-interface charge-discharge circuit and energy storage device Download PDF

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Publication number
CN116111671A
CN116111671A CN202211581395.XA CN202211581395A CN116111671A CN 116111671 A CN116111671 A CN 116111671A CN 202211581395 A CN202211581395 A CN 202211581395A CN 116111671 A CN116111671 A CN 116111671A
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China
Prior art keywords
energy storage
control module
storage device
signal
module
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CN202211581395.XA
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Chinese (zh)
Inventor
黄柳
欧阳正良
吴浩
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Shenzhen Longtech Smart Control Co ltd
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Shenzhen Longtech Smart Control Co ltd
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Priority to CN202211581395.XA priority Critical patent/CN116111671A/en
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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
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • 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
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • 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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a single-interface charge-discharge circuit and energy storage equipment, which are respectively connected with an input end of the energy storage equipment, an output end of the energy storage equipment and an external interface, and comprise: the device comprises a power supply module, a control module, a detection module and a switch module; the power module is respectively connected with the control module, the external interface and the input end of the energy storage device; the detection module is respectively connected with the external interface, the detection module and the control module; the control module is respectively connected with the input end of the energy storage device and the switch module; the switch module is respectively connected with the output end of the energy storage device and the external interface so as to realize the charging and discharging functions through one external interface.

Description

Single-interface charge-discharge circuit and energy storage device
Technical Field
The present invention relates to the field of electronic devices, and in particular, to a single-interface charge and discharge circuit and an energy storage device.
Background
As shown in fig. 1, the present energy storage device includes an energy storage unit and an energy storage inverter, wherein, current can be input through an input end of the energy storage device, and a BMS control board in the energy storage unit controls a battery pack to charge. The battery pack can be controlled by the BMS control panel in the energy storage unit to discharge, current is supplied to the energy storage inverter, the primary circuit in the energy storage inverter filters, stabilizes and boosts the direct current discharged and output by the battery pack to the secondary circuit, and the secondary circuit in the energy storage inverter outputs alternating current through the output end of the energy storage device after rectifying, stabilizing, inverting and LC oscillating the boosted current to supply power to a load (the left side of a broken line is the primary circuit, and the right side of the broken line is the secondary circuit).
However, the existing energy storage device needs two interfaces to realize the functions of charging and discharging, namely, the input end of the energy storage device is required to be charged, the output end of the energy storage device is required to be discharged, and the functions of charging and discharging cannot be realized at the same interface.
Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a single-interface charging and discharging circuit and an energy storage device, so as to solve the problem that the energy storage device in the prior art cannot be charged and discharged at the same ac interface.
The technical scheme of the invention is as follows:
a single interface charge-discharge circuit, respectively connected with an energy storage device input end, an energy storage device output end and an external interface, comprising: the device comprises a power supply module, a control module, a detection module and a switch module;
the power module is respectively connected with the control module, the external interface and the input end of the energy storage device and is used for rectifying and reducing the voltage of an alternating current signal input by the external interface so as to charge the input end of the energy storage device;
the detection module is respectively connected with the external interface, the detection module and the control module and is used for outputting a first signal to the control module when the external interface inputs an alternating current signal;
the control module is respectively connected with the input end of the energy storage device and the switch module and is used for outputting a second signal to the switch module when receiving the first signal and outputting a third signal to the switch module when not receiving the first signal;
the switch module is connected with the output end of the energy storage device and the external interface respectively and is used for disconnecting the output end of the energy storage device from the external interface according to the second signal and controlling the output end to be connected with the external interface according to the third signal.
According to a further arrangement of the invention, the switching module comprises a first switching tube and a relay;
the first switching tube is connected with the control module and used for being cut off according to the second signal;
the relay is connected with the switching tube, the output end of the energy storage device and the external interface respectively, and is used for disconnecting the connection between the output end of the energy storage device and the external interface when the switching tube is cut off.
In a further arrangement of the invention, the first switching tube is a triode.
In a further arrangement of the invention, the relay is a double pole double throw relay.
In a further arrangement of the present invention, the second signal is at a low level and the third signal is at a high level.
According to a further arrangement of the invention, the detection module comprises a diode, a first resistor and an optical coupler;
the positive pole of diode with the live wire end of external interface is connected, the negative pole of diode is connected with the first input of optocoupler, the second input of optocoupler with the zero line end of external interface is connected, the first output of optocoupler respectively with one end of first resistance and control module is connected, the other end of first resistance with power module connects, the second output ground connection of optocoupler.
Further, the power module of the present invention includes: a rectifying and voltage-reducing unit and a voltage-stabilizing unit;
the rectification voltage reduction unit is respectively connected with the external interface and the input end of the energy storage device and is used for rectifying and reducing the voltage of the alternating current input by the external interface and outputting the alternating current to the input end of the energy storage device;
the voltage stabilizing unit is respectively connected with the rectification voltage reducing unit, the detection module and the control module and is used for stabilizing voltage of signals after the rectification voltage reducing unit reduces voltage and outputting the signals to the control module.
The invention further provides a display module;
the display module is connected with the control module and is used for displaying the state when the control module receives the first signal.
The invention is further characterized in that the control module comprises: the system comprises a primary control module, an isolated communication interface and a secondary control module;
one end of the primary control module is connected with the input end of the energy storage device, the other end of the primary control module is connected with one end of the isolation communication interface, and the other end of the isolation communication interface is connected with the secondary control module.
An energy storage device comprising an energy storage unit, an energy storage inverter and a single interface charge-discharge circuit as described above;
the energy storage unit is respectively connected with the input end of the energy storage equipment and the energy storage inverter, and is used for carrying out charge and discharge through signals input by the input end of the energy storage equipment and outputting direct current signals to the energy storage inverter during discharge;
the energy storage inverter is respectively connected with the energy storage unit and the output end of the energy storage device and is used for inverting the direct current signal into an alternating current signal and outputting the alternating current signal to the output end of the energy storage device.
The invention provides a single-interface charge-discharge circuit and energy storage equipment, which are respectively connected with an input end of the energy storage equipment, an output end of the energy storage equipment and an external interface, and are characterized by comprising the following components: the device comprises a power supply module, a control module, a detection module and a switch module; the power module is respectively connected with the control module, the external interface and the input end of the energy storage device and is used for rectifying and reducing the voltage of an alternating current signal input by the external interface so as to charge the input end of the energy storage device; the detection module is respectively connected with the external interface, the detection module and the control module and is used for outputting a first signal to the control module when the external interface inputs an alternating current signal; the control module is respectively connected with the input end of the energy storage device and the switch module and is used for outputting a second signal to the switch module when receiving the first signal and outputting a third signal to the switch module when not receiving the first signal; the switch module is connected with the output end of the energy storage device and the external interface respectively and is used for disconnecting the output end of the energy storage device from the external interface according to the second signal and controlling the output end to be connected with the external interface according to the third signal. According to the invention, the external interface is used as a charging interface and a discharging interface, and the switch module is respectively connected with the external interface and the output end of the energy storage device, so that the switch module is controlled to disconnect the connection between the external interface and the output end of the energy storage device during charging (when an alternating current signal is input by the external interface), thereby preventing the energy storage device from being damaged, and the switch module is controlled to connect the external interface and the output end of the energy storage device during discharging (when an alternating current signal is not input by the external interface), thereby enabling the output end of the output device to normally output current. Thereby realizing the charge and discharge functions through one interface (external interface).
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained from the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a prior art energy storage device.
Fig. 2 is a schematic diagram of a single interface charge-discharge circuit in accordance with the present invention.
Fig. 3 is a circuit diagram of a switch module in a single-interface charge-discharge circuit according to the present invention.
Fig. 4 is a circuit diagram of a detection module in a single-interface charge-discharge circuit according to the present invention.
Fig. 5 is a schematic diagram of an energy storage device of the present invention.
Detailed Description
The invention provides a single-interface charge-discharge circuit and energy storage equipment, which are used for making the purposes, technical schemes and effects of the invention clearer and more definite, and the invention is further described in detail below by referring to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description and claims, unless the context specifically defines the terms "a," "an," "the," and "the" include plural referents. If there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 2 to 5, the present invention provides a preferred embodiment of a single-interface charge-discharge circuit.
As shown in fig. 2, the single-interface charge-discharge circuit is connected to the input end P1 of the energy storage device, the output end P2 of the energy storage device, and the external interface P3, and is characterized by comprising: a power module 100, a control module 200, a detection module 300, and a switching module 400; the power module 100 is respectively connected with the control module 200, the external interface P3 and the input end P1 of the energy storage device, and is configured to rectify and step down an ac signal input by the external interface P3 to charge the input end P1 of the energy storage device; the detection module 300 is respectively connected with the external interface P3 and the control module 200, and is configured to output a first signal to the control module 200 when the external interface P3 inputs an ac signal; the control module 200 is respectively connected with the energy storage device input end P1 and the switch module 400, and is configured to output a second signal to the switch module 400 when receiving the first signal, and output a third signal to the switch module 400 when not receiving the first signal; the switch module 400 is connected to the energy storage device output end P2 and the external interface P3, and is configured to disconnect the connection between the energy storage device output end P2 and the external interface P3 according to the second signal, and control the connection between the output end and the external interface P3 according to the third signal.
Specifically, with the external interface P3 as a charging interface, the external interface P3 is connected with the power module 100, when the external interface P3 is connected with an ac signal, the power module 100 rectifies and reduces the voltage of the ac signal and outputs the rectified ac signal to the input end P1 of the energy storage device, when the input end of the energy storage device receives a current, the BMS control board in the energy storage device controls the battery pack to charge, the detection module 300 is respectively connected with the external interface P3 and the control module 200, when the external interface P3 inputs the ac signal, the detection module 300 outputs a first signal to the control module 200, and outputs a second signal to the switch module 400 according to the first signal by the control module 200, so as to control the switch module 400 to disconnect the connection between the output end of the energy storage device and the external interface P3, thereby preventing the external interface P3 from being connected with the ac signal to burn the circuit when the energy storage device is charged.
The external interface P3 is used as a discharging interface, and the BMS control board in the energy storage device controls the battery pack to discharge, at this time, the external interface P3 has no ac signal input, that is, the detection module 300 connected to the external interface P3 has no ac signal input, and will not output a first signal to the control module 200. And when the control module 200 does not receive the first signal, a third signal is output to the switch module 400 to control the output end to connect with the external interface P3, so that the external interface P3 normally outputs an ac signal to supply power to the load. Thereby realizing the function of charging and discharging through one interface (the external interface P3).
It should be noted that, the power module 100 is further connected to the detection module 300 and the control module 200, when the energy storage device is charged, that is, when the external interface P3 is connected to the ac signal, the power module 100 not only rectifies the ac signal and steps down the voltage to output the ac signal to the input end P1 of the energy storage device, but also rectifies and steps down the ac signal to output the ac signal to the control module 200 and the detection module 300, so as to supply power to the control module 200 and the detection module 300, and further can control the switch to operate when the energy storage device is charged.
The control module 200 is further connected to the input end P1 of the energy storage device, and when the energy storage device discharges, the control module 200 is connected to the input end P1 of the energy storage device, so as to provide electric energy for the control module 200 through the discharge of the energy storage device, and further, when the energy storage device discharges, the switch module 400 can be controlled to operate.
In one embodiment, as shown in fig. 3, the switching module 400 includes a first switching tube Q1 and a relay K1; the first switching tube Q1 is connected with the control module 200, and is configured to perform blocking according to the second signal; the relay K1 is respectively connected with the switching tube, the energy storage device output end P2 and the external interface P3, and is used for disconnecting the energy storage device output end P2 from the external interface P3 when the switching tube is cut off.
Specifically, the first switching tube Q1 is a triode, and the relay K1 is a double-pole double-throw relay K1. The base of the first switch tube Q1 is connected with the control module 200, the emitter of the first switch tube Q1 is grounded, the collector of the first switch tube Q1 is connected with the grounding end of the relay K1, the power end of the relay K1 is connected with the power module 100, two common endpoints of the relay K1 are respectively connected with a live wire port P31 of an external interface and a zero wire port P32 of the external interface, two normally open contacts of the relay K1 are suspended, and two normally closed contacts of the relay K1 are connected with a live wire port P21 of an output end of the energy storage equipment and a zero wire port P22 of the output end of the energy storage equipment. The default state of the relay K1 is a normally open state.
When the energy storage device is in the standby state, the control module 200 is in the standby state because it is not powered, that is, it will not output a signal to the switch module 400, that is, the relay K1 is kept in the normally open state, and the output end P2 of the energy storage device is kept disconnected from the external interface P3, so as to prevent the external interface P3 from being connected with an ac signal and burning the circuit in the standby state.
When the energy storage device is in a working state and is in charging, that is, when the external connection interface P3 has an ac signal input, the control module 200 is connected with the power module 100 when the input end P1 of the energy storage device has a signal input, the control module 200 rectifies and reduces the voltage of the ac signal input by the external connection interface P3 through the power module 100 and outputs the rectified and reduced voltage to the control module 200 so as to supply power to the control module 200, and after the control module 200 receives the power supply, when the detection module 300 outputs a first signal, a low level (the second signal is a low level) is output to the base electrode of the first switching tube Q1 so as to cut off the first switching tube Q1, and the energy storage output end is disconnected from the external connection interface P3 so as to avoid burning a circuit when the energy storage device is charged.
When the energy storage device is in a working state and is in a discharging state, that is, when no signal is input to the input end P1 of the energy storage device, the external connection interface P3 does not input an alternating current signal, the detection module 300 does not output a first signal to the control module 200, when the control module 200 is powered but does not receive the first signal, a high level (the third signal is in a high level) is output to the base electrode of the first switching tube Q1, the first switching tube Q1 is conducted, so that the collector electrode of the first switching tube Q1 is in equipotential with the emitter electrode of the first switching tube Q1, which can be understood as that at this time, the collector electrode of the first switching tube Q1 is grounded, that is, the grounding end of the relay K1 connected with the collector electrode of the first switching tube Q1 is grounded, so that the relay K1 is electrified, when the relay K1 is electrified, the relay K1 has a normally-open state, so that the public end of the relay K1 is in normally-closed state, and the normally-closed end point of the relay K1 is connected with the relay K1, so that the external connection interface P3 is normally connected with the output end P3.
In one embodiment, as shown in fig. 4, the detection module 300 includes a diode VD1, a first resistor R1, and an optocoupler IC1; the anode of the diode VD1 is connected with a live wire end P31 of the external interface, and the cathode of the diode VD1 is connected with a first input end of the optical coupler IC1; the second input end of the optocoupler IC1 is connected with the zero line end P32 of the external interface, the first output end of the optocoupler IC1 is connected with one end of the first resistor R1 and the control module 200, the other end of the first resistor R1 is connected with the power module 100, and the second output end of the optocoupler IC1 is grounded.
Specifically, since the external interface P3 inputs an ac signal, the ac signal is a signal whose current direction changes, and the change is positive and negative with respect to the reference voltage. Therefore, by setting the positive electrode of the diode VD1 to be connected to the live wire end P31 of the external interface, when the ac signal input by the external interface P3 is in the positive half cycle, the diode VD1 is turned on, so that the optocoupler IC1 connected to the diode VD1 is turned on, and after the optocoupler IC1 is turned on, the first output end and the second output end have the same potential, which means that after the optocoupler IC1 is turned on, the first output end is grounded, and the control module 200 connected to the first output end receives a low level input. When the ac signal input from the external interface P3 is in the negative half cycle, the diode VD1 is turned off due to unidirectional conductivity, so that the optocoupler IC1 connected to the diode VD1 is turned off, that is, the first output terminal and the second output terminal are in a disconnected state, and the voltage input from the control module 200 and the power module 100 is equal in potential. And further, when an ac signal is input to the external interface P3, a square wave signal is output to the control module 200, so as to implement an ac detection function.
In one embodiment, as shown in fig. 5, the control module 200 includes: a primary control module 210, an isolated communication interface 220, and a secondary control module 230; one end of the primary control module 210 is connected to the detection module 300, the power module 100, and the energy storage device input end P1, the other end of the primary control module 210 is connected to one end of the isolation communication interface 220, the other end of the isolation communication interface 220 is connected to one end of the secondary control module 230, and the other end of the secondary control module 230 is connected to the switch module 400.
Specifically, the primary control module 210, the isolated communication interface 220, and the secondary control module 230 are part of an energy storage device, the primary control module 210 is a controller of a primary circuit in the energy storage device, and the secondary control module 230 is a controller of a secondary circuit in the energy storage device.
When the energy storage device is charged, the primary control module 210 is connected to the power module 100, when the external interface P3 inputs an ac signal, the power module 100 processes the ac signal and outputs the processed ac signal to the primary control module 210 to supply power to the primary control module 210, and the primary control module 210 is further connected to the detection module 300, when the detection module 300 detects the input of the ac signal, a first signal is output to the primary control module 210, and when the primary control module 210 receives the first signal, a second signal is sent to the secondary control module 230 through the isolated communication interface 220, where, because the secondary circuit is a high voltage circuit with respect to the primary circuit, the isolated communication interface 220 needs to be set to perform signal transmission between the primary control module 210 and the secondary control module 230, so as to prevent the primary control module 210 from being damaged due to high voltage. When the secondary control module 230 receives the second signal, the secondary control module 230 is connected with the switch module 400 to control the switch module 400 to disconnect the connection between the output end P2 of the energy storage device and the external interface P3, so as to prevent the external interface P3 from being connected with an ac signal to burn the circuit when the energy storage device is charged.
When the energy storage device discharges, the primary control module 210 is powered by the current discharged and output by the battery pack in the energy storage device, and when the primary control module 210 is powered, but the detection module 300 connected with the primary control module 210 does not output a first signal to the primary control module 210 (the detection module 300 does not detect the ac input of the external interface P3), the primary control module 210 outputs a third signal to the secondary control module 230 through the isolated communication interface 220, and the secondary control module 230 controls the switch module 400 to control the output end P2 of the energy storage device to be connected with the external interface P3, so that the external interface P3 normally outputs the current. By employing the primary control module 210 and the secondary control module 230 internal to the energy storage device for control, costs may be further reduced.
In one embodiment, as shown in fig. 5, the power module 100 includes: a rectifying step-down unit 110 and a voltage stabilizing unit 120; the rectifying and voltage-reducing unit 110 is respectively connected with the external interface P3 and the input end P1 of the energy storage device, and is configured to rectify and reduce voltage of the alternating current input by the external interface P3 and output the rectified and voltage reduced alternating current to the input end P1 of the energy storage device; the voltage stabilizing unit 120 is respectively connected to the rectifying and voltage reducing unit 110 and the control module 200, and is configured to stabilize the voltage of the signal after the voltage is reduced by the rectifying and voltage reducing unit 110 and output the stabilized voltage to the control module 200.
Specifically, in some cases, the battery pack in the energy storage device cannot directly receive the ac signal for charging, so by setting the rectification step-down unit 110, the external connection interface P3 is respectively connected to the input end P1 of the energy storage device, the rectification step-down unit 110 rectifies the ac signal input by the external connection interface P3 to output a dc signal, and performs a step-down process to provide a suitable voltage for the battery pack connected to the input end P1 of the energy storage device for charging.
The control module 200 cannot be powered when the battery pack in the energy storage device is charged, and the switching module 400 cannot be controlled to operate without the control module 200 being supplied with power. Also, in some cases, the charging voltage required by the battery pack is not the same as the power supply voltage of the control module 200 and the power supply voltage of the detection module 300. Therefore, by providing the voltage stabilizing unit 120 to be respectively connected with the detection module 300 and the control module 200, the voltage stabilizing unit 120 performs voltage stabilizing processing on the signal output by the rectifying and voltage reducing unit 110, so as to provide appropriate voltages for the control module 200 and the detection module 300 to supply power.
In one embodiment, as shown in fig. 5, the single-interface charge-discharge circuit further includes a display module 500; the display module 500 is connected to the control module 200, and is configured to perform status display when the control module 200 receives the first signal.
Specifically, the display module 500 is connected to the control module 200, and when the control module 200 receives the first signal, that is, when detecting that the external interface P3 has an ac signal input, the control module 200 controls the display module 500 to perform status display, which indicates that the status is in a charging state at this time.
The invention also provides energy storage equipment, which comprises an energy storage unit, an energy storage inverter and the single-interface charge-discharge circuit; the energy storage unit is respectively connected with the input end of the energy storage equipment and the energy storage inverter and is used for charging and discharging through signals input by the input end of the energy storage equipment and outputting direct current signals to the energy storage inverter during discharging. The energy storage inverter is respectively connected with the energy storage unit and the output end of the energy storage device and is used for inverting the direct current signal into an alternating current signal and outputting the alternating current signal to the output end of the energy storage device so as to supply power for a load. In particular, the embodiment of the single-interface charge-discharge circuit is described, and will not be described herein.
In summary, the single-interface charge-discharge circuit and the energy storage device provided by the invention are respectively connected with the input end of the energy storage device, the output end of the energy storage device and the external interface, and comprise: the device comprises a power supply module, a control module, a detection module and a switch module; the power module is respectively connected with the control module, the external interface and the input end of the energy storage device and is used for rectifying and reducing the voltage of an alternating current signal input by the external interface so as to charge the input end of the energy storage device; the detection module is respectively connected with the external interface, the detection module and the control module and is used for outputting a first signal to the control module when the external interface inputs an alternating current signal; the control module is respectively connected with the input end of the energy storage device and the switch module and is used for outputting a second signal to the switch module when receiving the first signal and outputting a third signal to the switch module when not receiving the first signal; the switch module is connected with the output end of the energy storage device and the external interface respectively and is used for disconnecting the output end of the energy storage device from the external interface according to the second signal and controlling the output end to be connected with the external interface according to the third signal. According to the invention, the external interface is used as a charging interface and a discharging interface, and the switch module is respectively connected with the external interface and the output end of the energy storage device, so that the switch module is controlled to disconnect the connection between the external interface and the output end of the energy storage device during charging (when an alternating current signal is input by the external interface), thereby preventing the energy storage device from being damaged, and the switch module is controlled to connect the external interface and the output end of the energy storage device during discharging (when an alternating current signal is not input by the external interface), thereby enabling the output end of the output device to normally output current. Thereby realizing the charge and discharge functions through one interface (external interface).
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.

Claims (10)

1. A single interface charge-discharge circuit, respectively with energy storage equipment input, energy storage equipment output and external interface connection, its characterized in that includes: the device comprises a power supply module, a control module, a detection module and a switch module;
the power module is respectively connected with the control module, the external interface and the input end of the energy storage device and is used for rectifying and reducing the voltage of an alternating current signal input by the external interface so as to charge the input end of the energy storage device;
the detection module is respectively connected with the external interface, the detection module and the control module and is used for outputting a first signal to the control module when the external interface inputs an alternating current signal;
the control module is respectively connected with the input end of the energy storage device and the switch module and is used for outputting a second signal to the switch module when receiving the first signal and outputting a third signal to the switch module when not receiving the first signal;
the switch module is connected with the output end of the energy storage device and the external interface respectively and is used for disconnecting the output end of the energy storage device from the external interface according to the second signal and controlling the output end to be connected with the external interface according to the third signal.
2. The single interface charge and discharge circuit of claim 1, wherein the switch module comprises a first switch tube and a relay;
the first switching tube is connected with the control module and used for being cut off according to the second signal;
the relay is connected with the switching tube, the output end of the energy storage device and the external interface respectively, and is used for disconnecting the connection between the output end of the energy storage device and the external interface when the switching tube is cut off.
3. The single interface charge and discharge circuit of claim 2, wherein the first switching transistor is a triode.
4. The single-interface charge and discharge circuit of claim 2, wherein the relay is a double pole double throw relay.
5. The single interface charge and discharge circuit of claim 2, wherein the second signal is low and the third signal is high.
6. The single interface charge and discharge circuit of claim 1, wherein the detection module comprises a diode, a first resistor, and an optocoupler;
the positive pole of diode with the live wire end of external interface is connected, the negative pole of diode is connected with the first input of optocoupler, the second input of optocoupler with the zero line end of external interface is connected, the first output of optocoupler respectively with one end of first resistance and control module is connected, the other end of first resistance with power module connects, the second output ground connection of optocoupler.
7. The single interface charge and discharge circuit of claim 1, wherein the power module comprises: a rectifying and voltage-reducing unit and a voltage-stabilizing unit;
the rectification voltage reduction unit is respectively connected with the external interface and the input end of the energy storage device and is used for rectifying and reducing the voltage of the alternating current input by the external interface and outputting the alternating current to the input end of the energy storage device;
the voltage stabilizing unit is respectively connected with the rectification voltage reducing unit, the detection module and the control module and is used for stabilizing voltage of signals after the rectification voltage reducing unit reduces voltage and outputting the signals to the control module.
8. The single interface charge and discharge circuit of claim 1, further comprising a display module;
the display module is connected with the control module and is used for displaying the state when the control module receives the first signal.
9. The single interface charge and discharge circuit of claim 1, wherein the control module comprises: the system comprises a primary control module, an isolated communication interface and a secondary control module;
one end of the primary control module is connected with the input end of the energy storage device, the other end of the primary control module is connected with one end of the isolation communication interface, and the other end of the isolation communication interface is connected with the secondary control module.
10. An energy storage device, characterized in that the energy storage device comprises an energy storage unit, an energy storage inverter and the single interface charge-discharge circuit of any one of claims 1-8;
the energy storage unit is respectively connected with the input end of the energy storage equipment and the energy storage inverter, and is used for carrying out charge and discharge through signals input by the input end of the energy storage equipment and outputting direct current signals to the energy storage inverter during discharge;
the energy storage inverter is respectively connected with the energy storage unit and the output end of the energy storage device and is used for inverting the direct current signal into an alternating current signal and outputting the alternating current signal to the output end of the energy storage device.
CN202211581395.XA 2022-12-09 2022-12-09 Single-interface charge-discharge circuit and energy storage device Pending CN116111671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211581395.XA CN116111671A (en) 2022-12-09 2022-12-09 Single-interface charge-discharge circuit and energy storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211581395.XA CN116111671A (en) 2022-12-09 2022-12-09 Single-interface charge-discharge circuit and energy storage device

Publications (1)

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CN116111671A true CN116111671A (en) 2023-05-12

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