Circuit for realizing charging and discharging switching and charging and discharging equipment

Abstract

The invention relates to the technical field of electric vehicle charging and discharging guns, and discloses a circuit for realizing charging and discharging switching and charging and discharging equipment, a rectifying circuit outputs a first power supply voltage aiming at a voltage control circuit according to a voltage received by an input end of the rectifying circuit, and outputs a target signal aiming at a signal control circuit according to the voltage; the voltage control circuit reduces the first power supply voltage to obtain second power supply voltage and provides the second power supply voltage to the signal control circuit; the signal control circuit controls the charging end or the discharging end to execute corresponding charging and discharging operation through the rectifying circuit according to the target signal, automatic switching of the charging and discharging modes can be achieved based on the received voltage, the application requirements of different input ends can be met, manual replacement of a charging and discharging gun is not needed, the charging and discharging efficiency is improved, and the charging and discharging cost is reduced. And through the circuit designed by the scheme, the reduction of charge and discharge gun heads can be realized, the cost of the gun heads is reduced, and the charge and discharge cost of charge and discharge equipment is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle charging and discharging guns, and in particular to a circuit and a charging and discharging device for realizing charging and discharging switching. Background Art

[0002] In the prior art, since the resistance values ​​of CC to PE of the charging gun and the discharging gun are often different (for example, the resistance value of CC to PE of the discharging gun head is usually 2KΩ, and the resistance value of CC to PE of the charging gun head is usually between 100Ω-1.5KΩ), the charging gun and the discharging gun in the traditional charging and discharging equipment cannot share the same gun head.

[0003] However, practice has found that the traditional electric vehicle charging and discharging equipment designed with two gun heads usually requires users to manually switch the charging and discharging mode according to actual needs. Specifically, the user manually selects the required gun head and manually inserts the selected gun head into the corresponding interface, which is not conducive to the charging and discharging efficiency. In addition, each gun head is expensive, which easily leads to high charging and discharging costs of the charging and discharging equipment. It can be seen that it is particularly important to propose a technical solution that improves the charging and discharging efficiency while reducing the cost of the charging and discharging equipment. Summary of the invention

[0004] The present invention provides a circuit and a charging and discharging device for realizing charging and discharging switching, which can realize automatic switching of charging and discharging modes without manual replacement of charging and discharging guns, thereby being beneficial to improving charging and discharging efficiency and reducing charging and discharging costs of the charging and discharging device.

[0005] In order to solve the above technical problems, the first aspect of the present invention discloses a method for realizing charge and discharge switching, wherein the circuit includes a signal control circuit, a rectifier circuit and a voltage control circuit, wherein:

[0006] The first input end of the rectifier circuit is used to be electrically connected to the charging end, the second input end of the rectifier circuit is used to be electrically connected to the discharging end, the signal output end of the rectifier circuit is electrically connected to the signal input end of the signal control circuit, the voltage output end of the rectifier circuit is electrically connected to the voltage input end of the voltage control circuit and the first power supply end of the signal control circuit, the voltage output end of the voltage control circuit is electrically connected to the second power supply end of the signal control circuit, and the enable end of the rectifier circuit is electrically connected to the signal output end of the signal control circuit;

[0007] The rectifier circuit is used to output a first supply voltage for the voltage control circuit according to the voltage received at the input terminal of the rectifier circuit, and output a target signal for the signal control circuit according to the voltage at the input terminal, the voltage at the input terminal comprising a charging voltage from the charging terminal or a discharging voltage from the discharging terminal, and the target signal comprising a charging signal corresponding to the charging voltage or a discharging signal corresponding to the discharging voltage;

[0008] The voltage control circuit is used to step down the received first supply voltage to obtain a second supply voltage, and provide the second supply voltage to the signal control circuit;

[0009] The signal control circuit is used to receive the target signal and, based on the target signal, control the charging end or the discharging end to perform corresponding charging and discharging operations through the rectifier circuit, wherein the charging and discharging operations include charging operations corresponding to the charging signal or discharging operations corresponding to the discharging signal.

[0010] As an optional implementation, in the first aspect of the present invention, the rectifier circuit includes a rectifier bridge circuit and a signal detection circuit, wherein:

[0011] The first input end of the rectifier circuit is used to electrically connect to the charging end, the second input end of the rectifier bridge circuit and the input end of the signal detection circuit are both used to electrically connect to the discharging end, the signal output end of the signal detection circuit is electrically connected to the signal input end of the signal control circuit, the voltage output end of the rectifier bridge circuit is electrically connected to the voltage input end of the voltage control circuit and the first power supply end of the signal control circuit, and the enable end of the rectifier bridge circuit is electrically connected to the signal output end of the signal control circuit;

[0012] The rectifier bridge circuit is used for converting the charging voltage or the discharging voltage from the charging end to obtain a first supply voltage for the voltage control circuit when receiving the charging voltage from the charging end or the discharging voltage from the discharging end;

[0013] The signal detection circuit is used to output a charging signal corresponding to the charging voltage to the signal control circuit when receiving a charging voltage from the charging end, and to output a discharge signal corresponding to the discharge voltage to the signal control circuit when receiving a discharge voltage from the discharge end.

[0014] As an optional implementation, in the first aspect of the present invention, the rectifier bridge circuit includes a first rectifier bridge module, a second rectifier bridge module and a step-down module, wherein:

[0015] The first input end of the first rectifier bridge module and the second input end of the first rectifier bridge module are both used to electrically connect to the charging end, the first input end of the second rectifier bridge module and the second input end of the second rectifier bridge module are both used to electrically connect to the discharging end, the voltage output end of the first rectifier bridge module and the voltage output end of the second rectifier bridge module are both electrically connected to the voltage input end of the step-down circuit, the first enable end of the first rectifier bridge module and the first enable end of the second rectifier bridge module are both electrically connected to the first signal output end of the signal control circuit, the second enable end of the first rectifier bridge module and the second enable end of the second rectifier bridge module are both electrically connected to the second signal output end of the signal control circuit, and the voltage output end of the step-down module is electrically connected to the voltage input end of the voltage control circuit and the first power supply end of the signal control circuit;

[0016] The first rectifier bridge module is used to convert the charging voltage from an AC voltage to a DC voltage to obtain a target charging voltage when receiving the charging voltage from the charging end;

[0017] The second rectifier bridge module is used for converting the discharge voltage from an AC voltage to a DC voltage to obtain a target discharge voltage when receiving the discharge voltage from the discharge end;

[0018] The voltage reduction module is used to reduce the received target charging voltage or target discharging voltage to obtain a first supply voltage for the voltage control circuit.

[0019] As an optional implementation, in the first aspect of the present invention, the signal control circuit includes a signal control chip, a first switch control circuit and a second switch control circuit, wherein:

[0020] The signal input end of the first switch control circuit is electrically connected to the first signal output end of the signal control chip, the signal input end of the second switch control circuit is electrically connected to the second signal output end of the signal control chip, the signal output end of the first switch control circuit is electrically connected to the first enable end of the first rectifier bridge module in the rectifier circuit and the first enable end of the second rectifier bridge module in the rectifier circuit, the signal output end of the second switch control circuit is electrically connected to the second enable end of the first rectifier bridge module and the second enable end of the second rectifier bridge module, the power supply end of the first switch control circuit and the power supply end of the second switch control circuit are both electrically connected to the voltage output end of the buck module in the rectifier circuit, the signal input end of the signal control chip is electrically connected to the signal output end of the signal detection circuit, and the power supply end of the signal control chip is electrically connected to the voltage output end of the voltage control circuit;

[0021] The signal control chip is used to receive the target signal, and output a conduction control signal for the first switch control circuit and the second switch control circuit according to the target signal, and control the conduction of the first switch control circuit and the second switch control circuit according to the conduction control signal, so as to realize the charging end or the discharging end performing corresponding charging and discharging operations through the rectifier circuit.

[0022] As an optional implementation, in the first aspect of the present invention, the first switch control circuit includes a first switch device, a second switch device, a first diode, a first capacitor, a first resistor and a second resistor, wherein:

[0023] One end of the first resistor is electrically connected to the first signal output end of the signal control chip, the other end of the first resistor is electrically connected to the first pole of the first switching device, one end of the second resistor and one end of the first capacitor, the second pole of the first switching device is electrically connected to the positive pole of the first diode and the first pole of the second switching device, the negative pole of the first diode and the second pole of the second switching device are both electrically connected to the voltage output end of the step-down module, the third pole of the second switching device is electrically connected to the first enable end of the first rectifier bridge module and the first enable end of the second rectifier bridge module, the third pole of the second switching device is electrically connected to the first enable end of the first rectifier bridge module, and the fourth pole of the second switching device is electrically connected to the first enable end of the second rectifier bridge module, and the third pole of the first switching device, the other end of the second resistor and the other end of the first capacitor are all used for grounding.

[0024] As an optional implementation, in the first aspect of the present invention, the signal control circuit further includes a parameter detection circuit, a voltage input terminal of the parameter detection circuit is electrically connected to a voltage output terminal of the voltage control circuit, and a signal output terminal of the parameter detection circuit is electrically connected to a third signal input terminal of the signal control chip, wherein:

[0025] The parameter detection circuit is used to output corresponding parameter detection signals to the signal control chip according to the components of the parameter detection circuit, so that the signal control chip can perform safety detection on the process of the charging and discharging operation.

[0026] As an optional implementation, in the first aspect of the present invention, the number of the parameter detection circuits is greater than 1, and each of the parameter detection circuits is connected in parallel;

[0027] Wherein, each of the parameter detection circuits includes one of a current detection circuit, a voltage detection circuit, a leakage detection circuit and a temperature detection circuit.

[0028] As an optional implementation, in the first aspect of the present invention, the signal control circuit further includes a state display control circuit, wherein the power supply end of the state display control circuit is electrically connected to the voltage output end of the step-down module, and the signal input end of the state display control circuit is electrically connected to the third signal output end of the signal control chip;

[0029] The state display control circuit is used to receive the target display signal sent by the signal control chip, and according to the target display signal, control the state display control circuit to perform a state display operation corresponding to the target display signal.

[0030] As an optional implementation, in the first aspect of the present invention, the number of the status display control circuits is greater than 1, and each of the status display control circuits is connected in parallel.

[0031] A second aspect of the present invention discloses a charging and discharging device, which includes a device body, and further includes a circuit for realizing charging and discharging switching as described in any one of the items disclosed in the first aspect of the present invention.

[0032] The implementation of the present invention has the following beneficial effects:

[0033] The present invention provides a circuit for realizing charge and discharge switching, the circuit comprising a signal control circuit, a rectifier circuit and a voltage control circuit, wherein the first input end of the rectifier circuit is used to electrically connect to the charging end, the second input end of the rectifier circuit is used to electrically connect to the discharging end, the first signal output end of the rectifier circuit is electrically connected to the first signal input end of the signal control circuit, the second signal output end of the rectifier circuit is electrically connected to the second signal input end of the signal control circuit, the voltage output end of the rectifier circuit is electrically connected to the voltage input end of the voltage control circuit and the voltage input end of the signal control circuit, the voltage output end of the voltage control circuit is electrically connected to the power supply end of the control circuit, and the enable end of the rectifier circuit is electrically connected to the signal output end of the signal control circuit; the rectifier circuit is used to output a signal according to the rectifier circuit output. The voltage received by the input end is used to output the first supply voltage for the voltage control circuit, and according to the voltage of the input end, the target signal for the signal control circuit is output, the voltage of the input end includes the charging voltage from the charging end or the discharging voltage from the discharging end, and the target signal includes the charging signal corresponding to the charging voltage or the discharging signal corresponding to the discharging voltage; the voltage control circuit is used to step down the received first supply voltage to obtain the second supply voltage, and provide the second supply voltage to the signal control circuit; the signal control circuit is used to receive the target signal, and according to the target signal, control the charging end or the discharging end to perform the corresponding charging and discharging operation through the rectifier circuit, and the charging and discharging operation includes the charging operation corresponding to the charging signal or the discharging operation corresponding to the discharging signal. It can be seen that the present invention can realize the automatic switching of the charging and discharging mode based on the received voltage, can meet the application requirements of different input ends, does not need to manually replace the charging and discharging gun, is conducive to improving the charging and discharging efficiency, and the circuit designed by this scheme can realize the reduction of the charging and discharging gun head, reduce the cost of the gun head, and thus help reduce the charging and discharging cost of the charging and discharging equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 It is a structural schematic diagram of a circuit for realizing charge and discharge switching disclosed in an embodiment of the present invention;

[0036] Figure 2 It is a structural schematic diagram of a rectifier circuit disclosed in an embodiment of the present invention;

[0037] Figure 3 is a structural schematic diagram of a signal detection circuit disclosed in an embodiment of the present invention;

[0038] Figure 4 It is a structural schematic diagram of a rectifier bridge circuit disclosed in an embodiment of the present invention;

[0039] Figure 5 It is a structural schematic diagram of a voltage control circuit disclosed in an embodiment of the present invention;

[0040] Figure 6 It is a structural schematic diagram of a signal control circuit disclosed in an embodiment of the present invention;

[0041] Figure 7 is a structural schematic diagram of a first switch control circuit disclosed in an embodiment of the present invention;

[0042] Figure 8 is a structural schematic diagram of a second switch control circuit disclosed in an embodiment of the present invention;

[0043] Fig. 9 is a structural schematic diagram of another signal control circuit disclosed in an embodiment of the present invention;

[0044] Fig.10 is a structural schematic diagram of a current detection circuit disclosed in an embodiment of the present invention;

[0045] Fig.11 It is a structural schematic diagram of a voltage detection circuit disclosed in an embodiment of the present invention;

[0046] Fig.12 It is a structural schematic diagram of a leakage detection circuit disclosed in an embodiment of the present invention;

[0047] Fig.13 It is a structural schematic diagram of a temperature detection circuit disclosed in an embodiment of the present invention;

[0048] Fig.14 It is a structural schematic diagram of another circuit for realizing charge and discharge switching disclosed in an embodiment of the present invention;

[0049] Fig.15 It is a structural schematic diagram of a pulse width modulation circuit disclosed in an embodiment of the present invention;

[0050] Fig.16 It is a structural schematic diagram of a pulse signal detection circuit disclosed in an embodiment of the present invention;

[0051] Fig.17 It is a logic diagram of a pulse signal connected to a vehicle and a control output disclosed in an embodiment of the present invention;

[0052] Fig.18 It is a structural schematic diagram of a status display control circuit disclosed in an embodiment of the present invention;

[0053] Fig.19 It is a structural schematic diagram of a signal control chip disclosed in an embodiment of the present invention;

[0054] Fig. 20 It is a relationship chart of a vehicle interface connection state and RC resistance value disclosed in an embodiment of the present invention;

[0055] Fig.21 It is a structural schematic diagram of a charging and discharging device disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] It should be noted that, unless otherwise clearly specified and limited, the term "electrical connection" in the specification and claims of the present invention and the above-mentioned drawings should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. In addition, the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. The terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Embodiment 1

[0059] See also Figure 1 , Figure 1 is a schematic diagram of a circuit structure for realizing charge-discharge switching disclosed in an embodiment of the present invention. Figure 1 The circuit for realizing charge-discharge switching described above can be applied to any product that needs to charge and discharge an electric vehicle, and the embodiments of the present invention are not limited thereto. Figure 1 As shown, the circuit for realizing charge and discharge switching includes a signal control circuit 101, a rectifier circuit 102 and a voltage control circuit 103, wherein:

[0060] The first input end of the rectifier circuit 102 is used to electrically connect to the charging end, the second input end of the rectifier circuit 102 is used to electrically connect to the discharging end, the signal output end of the rectifier circuit 102 is electrically connected to the signal input end of the signal control circuit 101, the voltage output end of the rectifier circuit 102 is electrically connected to the voltage input end of the voltage control circuit 103 and the first power supply end of the signal control circuit 101, the voltage output end of the voltage control circuit 103 is electrically connected to the second power supply end of the signal control circuit 101, and the enable end of the rectifier circuit 102 is electrically connected to the signal output end of the signal control circuit 101;

[0061] The rectifier circuit 102 is used to output a first supply voltage for the voltage control circuit 103 according to the voltage received at the input end of the rectifier circuit 102, and output a target signal for the signal control circuit 101 according to the voltage at the input end;

[0062] The voltage control circuit 103 is used to step down the received first power supply voltage to obtain a second power supply voltage, and provide the second power supply voltage to the signal control circuit 101;

[0063] The signal control circuit 101 is used to receive the target signal and control the charging end or the discharging end to perform corresponding charging and discharging operations through the rectifier circuit 102 according to the target signal.

[0064] In the embodiment of the present invention, the charging end may be an interface of a power grid (such as a city power grid), and the discharging end may be a discharging interface of a tram (such as a discharging power strip or a charging converter).

[0065] In the embodiment of the present invention, optionally, the input end of the rectifier circuit 102 includes a first input end of the rectifier circuit 102 and a second input end of the rectifier circuit 102, wherein the first input end of the rectifier circuit 102 can receive a charging voltage from the charging end, and the second input end of the rectifier circuit 102 can receive a discharge voltage from the discharge end. The voltage of the input end includes a charging voltage from the charging end or a discharge voltage from the discharge end, and the target signal includes a charging signal corresponding to the charging voltage or a discharge signal corresponding to the discharge voltage. Specifically, when the received voltage is a charging voltage, the output target signal is a charging signal corresponding to the charging voltage, and when the received voltage is a discharge voltage, the output target signal is a discharge signal corresponding to the discharge voltage. It should be noted that the charging voltage at the charging end and the discharge voltage at the discharge end are not sent to the rectifier circuit 102 at the same time.

[0066] In the embodiment of the present invention, optionally, the charging and discharging operation includes a charging operation corresponding to the charging signal or a discharging operation corresponding to the discharging signal. Specifically, when the target signal is a charging signal, the charging end is controlled to perform a charging operation on the discharging end through the rectifier circuit 102 according to the charging signal corresponding to the charging voltage from the charging end; when the target signal is a discharging signal, the discharging end is controlled to perform a discharging operation through the rectifier circuit 102 according to the discharging signal corresponding to the discharging voltage from the discharging end.

[0067] It can be seen that implementation Figure 1 The described circuit for realizing charge and discharge switching can output a first supply voltage for the voltage control circuit 103 according to the voltage received at the input end of the rectifier circuit 102 through the rectifier circuit 102, and output a target signal for the signal control circuit 101 according to the voltage at the input end; the first supply voltage received is stepped down by the voltage control circuit 103 to obtain a second supply voltage, and the second supply voltage is provided to the signal control circuit 101; the target signal is received by the signal control circuit 101, and according to the target signal, the charging end or the discharging end is controlled to perform corresponding charge and discharge operations through the rectifier circuit 102, and the automatic switching of the charge and discharge mode can be realized based on the received voltage, and the application requirements of different input ends can be met, and there is no need to manually replace the charge and discharge gun, which is beneficial to improving the charge and discharge efficiency. In addition, the circuit designed by this scheme can realize the reduction of charge and discharge gun heads, reduce the cost of gun heads, and thus help reduce the charge and discharge cost of charging and discharging equipment.

[0068] In an optional embodiment, if Figure 2 and Figure 3 As shown, Figure 2 is a structural schematic diagram of a rectifier circuit disclosed in an embodiment of the present invention, Figure 3 1 is a schematic diagram of a signal detection circuit disclosed in an embodiment of the present invention, wherein the rectifier circuit 102 includes a rectifier bridge circuit 1021 and a signal detection circuit 1022, wherein:

[0069] The first input end of the rectifier bridge circuit 1021 is used to electrically connect to the charging end, the second input end of the rectifier bridge circuit 1021 and the input end of the signal detection circuit 1022 are both used to electrically connect to the discharging end, the signal output end KM-C of the signal detection circuit 1022 is electrically connected to the signal input end of the signal control circuit 101, the voltage output end of the rectifier bridge circuit 1021 is electrically connected to the voltage input end of the voltage control circuit 103 and the first power supply end of the signal control circuit 101, and the enable end of the rectifier bridge circuit 1021 is electrically connected to the signal output end of the signal control circuit 101;

[0070] The rectifier bridge circuit 1021 is used for converting the charging voltage or the discharging voltage from the charging end to obtain a first supply voltage for the voltage control circuit 103 when receiving the charging voltage from the charging end or the discharging voltage from the discharging end;

[0071] The signal detection circuit 1022 is used to output a charging signal corresponding to the charging voltage to the signal control circuit 101 when receiving a charging voltage from the charging end, and to output a discharge signal corresponding to the discharge voltage to the signal control circuit 101 when receiving a discharge voltage from the discharge end.

[0072] In an embodiment of the present invention, specifically, the target signal (the target signal includes a charging signal or a discharging signal) KM-C output by the signal output end of the signal detection circuit 1022 can be used to detect whether there is power at the first input end of the rectifier bridge, thereby detecting whether there is power at the charging end, and can also be used to detect whether there is power at the second input end of the rectifier bridge circuit 1021, thereby detecting whether there is power at the discharging end.

[0073] It can be seen that this optional embodiment can convert the charging voltage or the discharging voltage when receiving the charging voltage from the charging end or the discharging voltage from the discharging end through the rectifier bridge circuit 1021 to obtain the first power supply voltage for the voltage control circuit 103. By setting the rectifier bridge circuit 1021, the voltages output by the charging end and the discharging end can be converted to provide an accurate activation voltage for subsequent charging and discharging operations. When receiving the charging voltage from the charging end, the signal detection circuit 1022 outputs a charging signal corresponding to the charging voltage to the signal control circuit 101, and when receiving the discharging voltage from the discharging end, the signal detection circuit 1022 outputs a discharging signal corresponding to the discharging voltage to the signal control circuit 101. By setting the signal detection circuit 1022, an accurate target signal can be provided to the signal control circuit 101, which is beneficial to improve the accuracy of the subsequent signal control circuit 101 in judging the charging and discharging mode based on the accurate target signal, and further beneficial to realize the precise switching of the charging and discharging mode based on the accurate charging and discharging mode judgment result.

[0074] In this optional embodiment, as an optional implementation, as Figure 2 , Figure 4 and Figure 5 As shown, Figure 4 is a structural schematic diagram of a rectifier bridge circuit disclosed in an embodiment of the present invention, Figure 5 1 is a schematic diagram of a voltage control circuit disclosed in an embodiment of the present invention, wherein the rectifier bridge circuit 1021 includes a first rectifier bridge module 10211, a second rectifier bridge module 10212 and a step-down module 10213, wherein:

[0075] The first input terminal L1-IN of the first rectifier bridge module 10211 and the second input terminal N / L2-IN of the first rectifier bridge module 10211 are both used to electrically connect to the charging terminal, the first input terminal L1-OUT of the second rectifier bridge module 10212 and the second input terminal N / L2-OUT of the second rectifier bridge module 10212 are both used to electrically connect to the discharging terminal, the voltage output terminal of the first rectifier bridge module 10211 and the voltage output terminal of the second rectifier bridge module 10212 are both electrically connected to the voltage input terminal of the step-down circuit, the first enable terminal of the first rectifier bridge module 10211 and the first enable terminal of the second rectifier bridge module 10212 are both electrically connected to the first signal output terminal of the signal control circuit 101, the second enable terminal of the first rectifier bridge module 10211 and the second enable terminal of the second rectifier bridge module 10212 are both electrically connected to the second signal output terminal of the signal control circuit 101, and the voltage output terminal (such as Figure 4 +12V in the signal control circuit 101) is electrically connected to the voltage input terminal of the voltage control circuit 103 and the first power supply terminal of the signal control circuit 101;

[0076] The first rectifier bridge module 10211 is used for converting the charging voltage from an AC voltage to a DC voltage to obtain a target charging voltage when receiving the charging voltage from the charging end;

[0077] The second rectifier bridge module 10212 is used for converting the discharge voltage from an AC voltage to a DC voltage to obtain a target discharge voltage when receiving the discharge voltage from the discharge end;

[0078] The voltage reduction module 10213 is used to reduce the received target charging voltage or target discharging voltage to obtain a first supply voltage for the voltage control circuit 103 .

[0079] For example, when the charging end outputs an AC charging voltage of 220 volts, the 220 volt AC charging voltage can be converted into a DC charging voltage of 220 volts (i.e., the above-mentioned target charging voltage) through the first rectifier bridge module 10211; when the discharging end outputs an AC discharging voltage of 220 volts, the 220 volt AC discharging voltage can be converted into a DC discharging voltage of 220 volts (i.e., the above-mentioned target discharging voltage) through the second rectifier bridge module 10212, and then the received 220 volt DC voltage (the 220 volt DC voltage includes the 220 volt AC discharging voltage or the 220 volt DC discharging voltage) is stepped down to a DC voltage of 12 volts (i.e., the above-mentioned first supply voltage) through the step-down module 10213, and then the 12 volt DC voltage is stepped down to a DC voltage of 5 volts (i.e., the above-mentioned first supply voltage) through the voltage control circuit 103. Figure 5 +5V in the power supply).

[0080] It can be seen that this optional implementation can convert the charging voltage from an AC voltage to a DC voltage to obtain a target charging voltage when the charging voltage from the charging end is received by the first rectifier bridge module 10211; convert the discharge voltage from an AC voltage to a DC voltage to obtain a target discharge voltage when the discharge voltage from the discharge end is received by the second rectifier bridge module 10212; and step down the received target charging voltage or target discharge voltage by the step-down module 10213 to obtain a first power supply voltage for the voltage control circuit 103. By setting two rectifier bridges at the charging end and the discharge end, the AC voltage output by the charging end or the discharge end can be accurately converted into a DC voltage, and by setting the step-down module 10213, the DC voltage is stepped down to a suitable voltage, so that the voltage control circuit 103 can provide an accurate power supply voltage for the signal control circuit 101 based on the suitable voltage, thereby facilitating the activation of the signal control circuit 101, and further facilitating the signal control circuit 101 to control the normal operation of the entire charging and discharging process. The circuit designed in this embodiment can realize the automatic operation of the charging and discharging process when the charging and discharging end outputs a voltage, without the need for manual startup.

[0081] In another optional embodiment, Figure 6 , Figure 7 and Figure 8 As shown, Figure 6 is a structural diagram of a signal control circuit disclosed in an embodiment of the present invention, Figure 7 is a structural diagram of a first switch control circuit disclosed in an embodiment of the present invention, Figure 8 1 is a schematic diagram of a structure of a second switch control circuit disclosed in an embodiment of the present invention, wherein the signal control circuit 101 includes a signal control chip 1011, a first switch control circuit 1012 and a second switch control circuit 1013, wherein:

[0082] The signal input terminal KM2 of the first switch control circuit 1012 is electrically connected to the first signal output terminal of the signal control chip 1011, the signal input terminal KM1 of the second switch control circuit 1013 is electrically connected to the second signal output terminal of the signal control chip 1011, the signal output terminal of the first switch control circuit 1012 is electrically connected to the first enable terminal of the first rectifier bridge module 10211 in the rectifier circuit 102 and the first enable terminal of the second rectifier bridge module 10212 in the rectifier circuit 102, the signal output terminal of the second switch control circuit 1013 is electrically connected to the second enable terminal of the first rectifier bridge module 10211 and the second enable terminal of the second rectifier bridge module 10212, and the power supply terminal (such as Figure 7+12V in) and the power supply terminal of the second switch control circuit 1013 (such as Figure 7 The +12V in the rectifier circuit 102 is electrically connected to the voltage output terminal (such as the +12V in the rectifier circuit 102) of the step-down module 10213. Figure 4 The signal input terminal of the signal control chip 1011 is electrically connected to the signal output terminal KM-C of the signal detection circuit 1022, and the power supply terminal of the signal control chip 1011 is electrically connected to the voltage output terminal of the voltage control circuit 103 (such as Figure 5 +5V in the

[0083] The signal control chip 1011 is used to receive the target signal, and output a conduction control signal for the first switch control circuit 1012 and the second switch control circuit 1013 according to the target signal, and control the conduction of the first switch control circuit 1012 and the second switch control circuit 1013 according to the conduction control signal, so as to realize the corresponding charging and discharging operation of the charging end or the discharging end through the rectifier circuit 102.

[0084] In this optional embodiment, optionally, as Figure 7 As shown, the first switch control circuit 1012 includes a first switch device Q5, a second switch device RL1, a first diode D3, a first capacitor C18, a first resistor R52 and a second resistor R54, wherein:

[0085] One end of the first resistor R52 is electrically connected to the first signal output terminal KM2 of the signal control chip 1011, the other end of the first resistor R52 is electrically connected to the first pole of the first switch device Q5, one end of the second resistor R54 and one end of the first capacitor C18, the second pole of the first switch device Q5 is electrically connected to the positive pole of the first diode D3 and the first pole of the second switch device RL1, the negative pole of the first diode D3 and the second pole of the second switch device RL1 are both electrically connected to the voltage output end of the step-down module 10213, the third pole of the second switch device RL1 is electrically connected to the first enable end of the first rectifier bridge module 10211, and the fourth pole of the second switch device RL1 is electrically connected to the first enable end of the second rectifier bridge module 10212, the third pole of the first switch device Q5, the other end of the second resistor R54 and the other end of the first capacitor C18 are all used for grounding.

[0086] In the embodiment of the present invention, optionally, the first switching device Q5 can be a transistor, a MOS tube or any other device or component that can play an equivalent switching role, and the second switching device RL1 can be a relay, which can be automatically attracted when the signal control chip 1011 controls the first switching device Q5 to be turned on, so that the first enable end of the first rectifier bridge module 10211 and the first enable end of the second rectifier bridge module 10212 are turned on, thereby turning on the charging end and the discharging end, and then enabling the charging end or the discharging end to perform corresponding charging and discharging operations through the turned-on rectifier circuit 102.

[0087] Optionally, this optional embodiment can receive the target signal through the signal control chip 1011, and output a conduction control signal (KM1 and KM2) for the first switch control circuit 1012 and the second switch control circuit 1013 according to the target signal, and control the first switch control circuit 1012 and the second switch control circuit 1013 to be turned on according to the conduction control signal, so that the enable end of the rectifier circuit 102 is turned on, thereby turning on the charging end and the discharging end, so as to realize the corresponding charging and discharging operation of the charging end or the discharging end through the rectifier circuit 102, and can accurately realize the corresponding charging and discharging process of the charging end or the discharging end based on the conduction control signal of the signal control chip 1011.

[0088] The working principle of the circuit for realizing charge and discharge switching in the present invention is as follows:

[0089] In the embodiment of the present invention, when the charging end (such as the grid interface) is powered on, the charging voltage (such as 220V AC voltage) output by the charging end is converted into a target charging voltage (such as 220V DC voltage) through the first rectifier bridge module 10211, and the target charging voltage is stepped down into a first power supply voltage (such as +12V) through the step-down module 10213 to supply power to the first switch control circuit 1012 and the second switch control circuit 1013, and the first power supply voltage is stepped down into a second power supply voltage (such as +5V) through the voltage control circuit 103 to supply power to the signal control circuit 101. The signal control chip 1011 is powered by the second power supply voltage. At this time, the signal control circuit 101 receives the charging signal output by the signal detection circuit 1022 based on the charging voltage, thereby determining that the mode of the overall circuit is the charging mode, and outputs the conduction control signals KM2 and KM1 to the first switch control circuit 1012 and the second switch control circuit 1013 respectively, so that the switch devices Q5 and Q6 in the two switch control circuits are turned on, so that the relays RL1 and RL2 in the two switch control circuits are attracted, and then the charging end can be connected to the discharge end (such as the electric end) through the attracted relay. When the discharge end is powered on, the discharge voltage (e.g., 220V AC voltage) output by the discharge end is converted into a target charging voltage (e.g., 220V DC voltage) through the second rectifier bridge module 10212, and the target charging voltage is stepped down into a first power supply voltage (e.g., +12V) through the step-down module 10213 to supply power to the first switch control circuit 1012 and the second switch control circuit 1013, and the first power supply voltage is stepped down into a second power supply voltage (e.g., +5V) through the voltage control circuit 103 to supply power to the signal control circuit 101. The control chip 1011 is powered. At this time, the signal control circuit 101 is powered by the second power supply voltage, and the receiving signal detection circuit 1022 receives the discharge signal output by the above-mentioned discharge voltage, thereby determining that the mode of the overall circuit is the discharge mode, and outputs the conduction control signals KM2 and KM1 to the first switch control circuit 1012 and the second switch control circuit 1013 respectively, so that the switch devices Q5 and Q6 in the two switch control circuits are turned on, so that the relays RL1 and RL2 in the two switch control circuits are attracted, and then the discharge end can perform external discharge operation through the attracted relay. This scheme can realize automatic switching of the charge and discharge mode based on the received voltage, can meet the application requirements of different input ends, and does not need to manually replace the charge and discharge gun, which is conducive to improving the charge and discharge efficiency. The circuit designed by this scheme can reduce the charge and discharge gun heads, reduce the cost of the gun heads, and thus help reduce the charge and discharge cost of the charge and discharge equipment.

[0090] Embodiment 2

[0091] See also Fig. 9 , Fig. 9 is a schematic diagram of the structure of another signal control circuit disclosed in an embodiment of the present invention. Fig. 9 The signal control circuit 101 described is applied to a circuit for realizing charge and discharge switching, that is, Fig. 9 The signal control circuit 101 shown in FIG. 1 is a more specific circuit structure of the signal control circuit 101 in the first embodiment. Fig. 9 As shown, the signal control circuit 101 includes a signal control chip 1011, a first switch control circuit 1012 and a second switch control circuit 1013, and the signal control circuit 101 also includes a parameter detection circuit 1014, the voltage input end of the parameter detection circuit 1014 is electrically connected to the voltage output end of the voltage control circuit 103, and the signal output end of the parameter detection circuit 1014 is electrically connected to the third signal input end of the signal control chip 1011, wherein:

[0092] The parameter detection circuit 1014 is used to output corresponding parameter detection signals to the signal control chip 1011 according to the components of the parameter detection circuit 1014, so that the signal control chip 1011 can perform safety detection on the process of the charging and discharging operation.

[0093] It can be seen that implementation Fig. 9 The circuit used in the described signal control circuit 101 to realize charge and discharge switching can output corresponding parameter detection signals to the signal control chip 1011 through the parameter detection circuit 1014 according to the components of the parameter detection circuit 1014, so that the signal control chip 1011 performs safety detection on the process of the charge and discharge operation, and when it is detected that the parameters of the circuit meet the safety standards, the signal control chip 1011 outputs a conduction control signal to the first switch control circuit 1012 and the second switch control circuit 1013. By setting the parameter detection circuit 1014, the relevant parameters of the charge and discharge operation process can be accurately detected before the signal control chip 1011 controls the charging end or the discharging end to perform the corresponding charge and discharge operation, which is beneficial to improving the control safety of the charge and discharge operation.

[0094] In an optional embodiment, the number of parameter detection circuits 1014 is greater than 1, and each of the parameter detection circuits 1014 is connected in parallel; wherein each of the parameter detection circuits 1014 includes one of a current detection circuit, a voltage detection circuit, a leakage detection circuit and a temperature detection circuit.

[0095] For example, Figure 10-13 As shown, Fig.10 is a structural diagram of a current detection circuit disclosed in an embodiment of the present invention, Fig.11 is a schematic diagram of a voltage detection circuit disclosed in an embodiment of the present invention. Fig.12 is a schematic diagram of a leakage detection circuit disclosed in an embodiment of the present invention, Fig.13 is a schematic diagram of a temperature detection circuit disclosed in an embodiment of the present invention. Fig.10 , the signal control chip 1011 detects whether the current signal CI output by the received current detection circuit exceeds the preset output current (such as 1.1*standard output current) to determine whether there is overcurrent. Fig.11 , the signal control chip 1011 detects whether the voltage signal CV output by the received voltage detection circuit is greater than the overvoltage value to determine whether it is overvoltage. Fig.12 The leakage detection circuit outputs a corresponding leakage detection signal LK to the signal control chip 1011 according to whether the difference in the current vector sum of the L / N lines connected to the rectifier bridge circuit 1021 reaches 30mA, so that the signal control chip 1011 can determine whether there is leakage based on the leakage detection signal LK. Fig.13 , through the temperature sensing element set in the temperature detection circuit, such as using Fig.13 The NTC (negative temperature coefficient) thermistors R39 and R38 in the Fig.13 The voltage across the NTC decreases, and when the voltage decreases to a threshold, the signal control chip 1011 determines that the entire circuit is in an over-temperature state.

[0096] In this optional embodiment, if Fig.14 As shown, Fig.14 1 is a schematic diagram of a structure of another circuit for realizing charge-discharge switching disclosed in an embodiment of the present invention, wherein the circuit for realizing charge-discharge switching further includes a pulse width modulation circuit 104, and the signal control circuit 101 further includes a pulse signal detection circuit 1016, and Fig.15 , Fig.16 and Fig.17 As shown, Fig.15 is a schematic diagram of a pulse width modulation circuit disclosed in an embodiment of the present invention, Fig.16 is a schematic diagram of a pulse signal detection circuit disclosed in an embodiment of the present invention. Fig.17 is a logic diagram of a pulse signal connected to a vehicle and a control output disclosed in an embodiment of the present invention, wherein the voltage input terminal (such as Fig.15 The voltage output terminal of the voltage-reducing module 10213 in the rectifier circuit 102 is electrically connected to the voltage output terminal of the pulse width modulation circuit 104 (such as +12V in the rectifier circuit 102). Fig.15 -12V in) is electrically connected to the first power supply terminal (such as Fig.15-12V in), the second power supply terminal of the pulse signal detection circuit 1016 (such as Fig.16 The +12V in the voltage output terminal of the voltage module is electrically connected to the signal input terminal of the pulse signal detection circuit 1016 (such as Fig.16 The PWM_CTR and CC in the pulse signal detection circuit 1016 are electrically connected to the signal output terminal of the signal control chip 1011, and the signal output terminal CP_VOLIN of the pulse signal detection circuit 1016 is electrically connected to the fourth signal input terminal of the signal control chip 1011; the pulse width modulation circuit 104 is used to receive the first power supply voltage output by the step-down module 10213, and modulate the first power supply voltage to obtain the modulated first power supply voltage, and flow the modulated first power supply voltage to the pulse signal detection circuit 1016; the pulse signal detection circuit 1016 is used to output the pulse detection signal CP_VOLIN to the signal control chip 1011 according to the PWM_CTR signal output by the signal control chip 1011 under the power supply of the modulated first power supply voltage, so that the signal control chip 1011 can detect the pulse detection signal CP_VOLIN according to the PWM_CTR signal output by the signal control chip 1011. Fig.17 The logic diagram shown is used to determine whether the pulse detection signal CP_VOLIN is normal; the pulse signal detection circuit 1016 is also used to control the resistance value in the pulse signal detection circuit 1016 from the resistance value required for charging to the resistance value required for discharging according to the CC signal output by the signal control chip 1011 when the signal control chip 1011 switches to the discharge mode, so as to realize automatic switching of the charge and discharge operations.

[0097] It can be seen that this optional embodiment can realize the accuracy, flexibility and diversity of the signal control chip 1011's detection of multiple parameters by providing multiple parameter detection circuits 1014, which is beneficial to ensuring the safety of the overall circuit operation process, and the comprehensive parameter detection circuit is conducive to realizing the comprehensiveness of the protection function of the overall circuit.

[0098] In another optional embodiment, Fig. 9 and Fig.14 As shown, the signal control circuit 101 further includes a state display control circuit 1015, wherein the power supply end of the state display control circuit 1015 is electrically connected to the voltage output end (such as Figure 4 +12V in the state display control circuit 1015), the signal input end of the state display control circuit 1015 is electrically connected to the third signal output end of the signal control chip 1011; the state display control circuit 1015 is used to receive the target display signal sent by the signal control chip 1011, and according to the target display signal, control the state display control circuit 1015 to perform a state display operation corresponding to the target display signal.

[0099] In this optional embodiment, optionally, the number of the status display control circuits 1015 is greater than 1, and each of the status display control circuits 1015 is connected in parallel. Optionally, each status display control circuit 1015 may include one of a standby display control circuit, an operation display control circuit, and a fault display control circuit.

[0100] For example, Fig.18 As shown, Fig.18 It is a structural schematic diagram of a status display control circuit disclosed in an embodiment of the present invention, wherein, when the signal input terminal G of the standby display control circuit receives the standby display signal output by the signal control chip 1011, the standby display control circuit displays that the signal control chip 1011 is in the standby state, such as: the green light is turned on by the standby display control circuit; when the signal input terminal B of the operation display control circuit receives the operation display signal output by the signal control chip 1011, the operation display control circuit displays that the signal control chip 1011 is in the operation state, such as: the blue light is turned on when the gun is plugged in, and the blue light flashes when charging; when the signal input terminal R of the fault display control circuit receives the fault display signal output by the signal control chip 1011, the fault display control circuit displays that the entire circuit is in a fault state, such as: the red light is turned on by the fault display control circuit, and different faults can correspond to different red light lighting times (such as: the red light lighting times are 1 when overcurrent, and the red light lighting times are 2 when overvoltage).

[0101] It can be seen that this optional embodiment can achieve accuracy, diversity and flexibility in displaying the status of the entire circuit by setting up multiple status display control circuits 1015, and can quickly and accurately prompt the user of the corresponding status, so that the user can discover abnormal conditions in time, thereby helping to improve the accuracy and timeliness of maintenance of the entire circuit.

[0102] In this optional real-life example, Fig.19 As shown, Fig.19It is a structural schematic diagram of a signal control chip disclosed in an embodiment of the present invention, wherein the signal KM-C connected to the single-chip microcomputer U6 in the signal control chip 1011 is a detection signal of whether there is electricity at the output end of the rectifier circuit 102, and / or a detection signal of whether the relay is stuck / refuses to move; the signal PWM_CTR output by the single-chip microcomputer U6 is a CP signal generation signal, which is used to output to the pulse signal detection circuit 1016; the signal CP_VOLIN connected to the single-chip microcomputer U6 is a detection signal of whether a CP signal is generated, which is used to detect a pulse signal; the signal CV connected to the single-chip microcomputer U6 is a voltage detection signal of the charging end / discharging end, which is used to detect overvoltage; the signal CI connected to the single-chip microcomputer U6 is a current detection signal ; The signal P1 connected to the single-chip computer U6 is the detection signal of the discharge power strip / charging conversion head, which is used for gun insertion detection (specifically, the P1 end is used to electrically connect the discharge end, and the gun end CC and PE have built-in 2K resistor R9. When the P1 end is electrically connected to the discharge end, the resistor R9 is connected in parallel with the resistor R41. At this time, the parallel resistance is 1.05KΩ / / 2KΩ=688Ω. At this time, the electric car corresponding to the discharge end detects an impedance of 688Ω, and communicates with the single-chip computer U6 through the CM signal, and the gun insertion is completed; and after the gun is inserted, the relationship chart of the vehicle interface connection status corresponding to the electric car and the resistance value of RC is sent to the single-chip computer U6 through the CM signal, so that the single-chip computer U6 can control the charging current in the charging and discharging operation according to the relationship chart, such as Fig. 20 As shown, Fig. 20 It is a relationship chart of a vehicle interface connection state and a resistance value of RC disclosed in an embodiment of the present invention); the signal LK connected to the single-chip microcomputer U6 is a leakage current detection signal, which is used for leakage detection; the signals T1 and T2 connected to the single-chip microcomputer U6 are temperature detection signals, which are used for over-temperature detection; the signals R, G, and B output by the single-chip microcomputer U6 are indicator light color control signals, which are used to display the indicator light color displayed by the control state display control circuit 1015 and the display status of the corresponding indicator light color (such as: continuous lighting duration, number of lighting times, etc.) to realize the display of the overall circuit status; the signal CC output by the single-chip microcomputer U6 is a charge / discharge selection signal, which is used to determine the current mode of the circuit through the charge / discharge selection signal, specifically: if the current mode is the charging mode, the single-chip microcomputer U6 sets the CC signal to a high level; if the current mode is the discharging mode, the single-chip microcomputer U6 sets the CC signal to a low level.

[0103] The working principle of the circuit for realizing charge and discharge switching in the present invention is as follows:

[0104] In the embodiment of the present invention, when the charging end and the discharging end are not powered on, the standby display control circuit displays that the signal control chip 1011 is in a standby state (such as a green light), and the running display control circuit displays whether the overall circuit is plugged in (such as a blue light), and the subsequent process of energizing the charging end or the discharging end is performed only when the signal control chip 1011 is in a standby state and the overall circuit is plugged in. When the charging end (such as a power grid interface) is powered on, the charging voltage (such as a 220V AC voltage) output by the charging end is converted into a target charging voltage (such as a 220V DC voltage) through the first rectifier bridge module 10211, and the target charging voltage is stepped down into a first power supply voltage (such as +12V) through the step-down module 10213 to power the first switch control circuit 1012 and the second switch control circuit 1013, and the first power supply voltage is stepped down into a second power supply voltage (such as +5V) through the voltage control circuit 103 to power the signal control circuit 101. The signal control chip 1011 supplies power. At this time, the signal control circuit 101, under the power supply of the second power supply voltage, first detects the operating parameters of the overall circuit through the multiple parameter detection circuit 1014. When at least one operating parameter is detected to be abnormal, the fault display control circuit displays the fault state (such as a red light, and different fault conditions correspond to different light-on times). When all operating parameters are detected to be normal, the signal control circuit 101 receives the charging signal output by the signal detection circuit 1022 based on the above-mentioned charging voltage, thereby determining that the mode of the overall circuit is the charging mode, and outputs the conduction control signals KM2 and KM1 to the first switch control circuit 1012 and the second switch control circuit 1013 respectively, so that the switch devices Q5 and Q6 in the two switch control circuits are turned on, so that the relays RL1 and RL2 in the two switch control circuits are attracted, and then the charging end can perform a charging operation on the discharge end (such as the discharge interface of the electric vehicle) through the attracted relay;When the discharge end is powered on, the discharge voltage (such as 220V AC voltage) output by the discharge end is converted into a target charging voltage (such as 220V DC voltage) through the second rectifier bridge module 10212, and the target charging voltage is stepped down into a first power supply voltage (such as +12V) through the step-down module 10213 to power the first switch control circuit 1012 and the second switch control circuit 1013, and the first power supply voltage is stepped down into a second power supply voltage (such as +5V) through the voltage control circuit 103 to power the signal control chip 1011 in the signal control circuit 101. At this time, the signal control circuit 101, under the power supply of the second power supply voltage, first detects the operating parameters of the overall circuit through the multiple parameter detection circuit 1014, When at least one operating parameter is detected to be abnormal, the fault display control circuit displays the fault status (such as a red light turns on, and different fault conditions correspond to different light-on times). When all operating parameters are detected to be normal, the signal control circuit 101 receives the discharge signal output by the signal detection circuit 1022 based on the above-mentioned discharge voltage, thereby determining that the mode of the overall circuit is the discharge mode, and outputs conduction control signals KM2 and KM1 to the first switch control circuit 1012 and the second switch control circuit 1013 respectively, so that the switch devices Q5 and Q6 in the two switch control circuits are turned on, thereby closing the relays RL1 and RL2 in the two switch control circuits, and then enabling the discharge end to perform external discharge operation through the closed relay. This solution can realize automatic switching of the charging and discharging mode based on the received voltage, can meet the application requirements of different input terminals, and does not require manual replacement of the charging and discharging gun, which is conducive to improving the charging and discharging efficiency. The circuit designed by this solution can reduce the number of charging and discharging gun heads, reduce the cost of the gun heads, and thus help reduce the charging and discharging cost of the charging and discharging equipment; in addition, by setting a variety of parameter detection circuits 1014 and a variety of state display control circuits 1015, it is possible to accurately detect the operating parameters of the overall circuit and display the various states of the overall circuit, which is conducive to improving the control safety of subsequent charging and discharging operations based on the parameter detection circuit 1014, and is conducive to realizing the comprehensiveness of the protection function of the overall circuit, and is conducive to quickly and accurately prompting the user with the corresponding state based on the state display control circuit 1015, so that the user can find out in time when an abnormal state occurs, which is conducive to improving the accuracy and timeliness of the maintenance of the overall circuit. ;

[0105] Embodiment 3

[0106] See also Fig.21 , Fig.21 : is a schematic diagram of the structure of a charging and discharging device disclosed in an embodiment of the present invention. Fig. 20 The described charging and discharging device comprises a device body, and Fig.21The charging and discharging device described can be applied to any product that needs to charge and discharge an electric vehicle, and the embodiments of the present invention are not limited thereto. Fig. 20 As shown, the charging and discharging device also includes a circuit for realizing charging and discharging switching according to any one of the first embodiment of the present invention or the second embodiment of the present invention, or two embodiments, or three embodiments. It should be noted that for a detailed description of the circuit for realizing charging and discharging switching, please refer to the specific description of the relevant contents in the first embodiment to the second embodiment, which will not be repeated in this embodiment.

[0107] It can be seen that implementation Fig.21 The described charging and discharging device can realize automatic switching of the charging and discharging mode based on the received voltage, can meet the application requirements of different input ends, and does not require manual replacement of the charging and discharging guns, which is beneficial to improving the charging and discharging efficiency. The circuit designed by this scheme can realize the reduction of charging and discharging gun heads, reduce the cost of the gun heads, and thus help to reduce the charging and discharging cost of the charging and discharging equipment.

[0108] The above is a detailed introduction to a circuit and a charging and discharging device for realizing charging and discharging switching disclosed in an embodiment of the present invention. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present invention, but the above preferred embodiments are not used to limit the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for a general technician in this field, according to the idea of ​​the present invention, without departing from the spirit and scope of the present invention, there will be changes in the specific implementation method and the scope of application. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A circuit for realizing charge and discharge switching, characterized in that: The circuit includes a signal control circuit, a rectifier circuit and a voltage control circuit, wherein: The first input end of the rectifier circuit is used to be electrically connected to the charging end, the second input end of the rectifier circuit is used to be electrically connected to the discharging end, the signal output end of the rectifier circuit is electrically connected to the signal input end of the signal control circuit, the voltage output end of the rectifier circuit is electrically connected to the voltage input end of the voltage control circuit and the first power supply end of the signal control circuit, the voltage output end of the voltage control circuit is electrically connected to the second power supply end of the signal control circuit, and the enable end of the rectifier circuit is electrically connected to the signal output end of the signal control circuit; The rectifier circuit is used to output a first supply voltage for the voltage control circuit according to the voltage received at the input terminal of the rectifier circuit, and output a target signal for the signal control circuit according to the voltage at the input terminal, the voltage at the input terminal comprising a charging voltage from the charging terminal or a discharging voltage from the discharging terminal, and the target signal comprising a charging signal corresponding to the charging voltage or a discharging signal corresponding to the discharging voltage; The voltage control circuit is used to step down the received first supply voltage to obtain a second supply voltage, and provide the second supply voltage to the signal control circuit; The signal control circuit is used to receive the target signal and, according to the target signal, control the charging end or the discharging end to perform corresponding charging and discharging operations through the rectifier circuit, wherein the charging and discharging operations include charging operations corresponding to the charging signal or discharging operations corresponding to the discharging signal.

2. The circuit for realizing charge-discharge switching according to claim 1, characterized in that: The rectifier circuit includes a rectifier bridge circuit and a signal detection circuit, wherein: The first input end of the rectifier circuit is used to electrically connect to the charging end, the second input end of the rectifier bridge circuit and the input end of the signal detection circuit are both used to electrically connect to the discharging end, the signal output end of the signal detection circuit is electrically connected to the signal input end of the signal control circuit, the voltage output end of the rectifier bridge circuit is electrically connected to the voltage input end of the voltage control circuit and the first power supply end of the signal control circuit, and the enable end of the rectifier bridge circuit is electrically connected to the signal output end of the signal control circuit; The rectifier bridge circuit is used for converting the charging voltage or the discharging voltage from the charging end to obtain a first supply voltage for the voltage control circuit when receiving the charging voltage from the charging end or the discharging voltage from the discharging end; The signal detection circuit is used to output a charging signal corresponding to the charging voltage to the signal control circuit when receiving a charging voltage from the charging end, and to output a discharge signal corresponding to the discharge voltage to the signal control circuit when receiving a discharge voltage from the discharge end.

3. The circuit for realizing charge-discharge switching according to claim 2, characterized in that: The rectifier bridge circuit includes a first rectifier bridge module, a second rectifier bridge module and a step-down module, wherein: The first input end of the first rectifier bridge module and the second input end of the first rectifier bridge module are both used to electrically connect to the charging end, the first input end of the second rectifier bridge module and the second input end of the second rectifier bridge module are both used to electrically connect to the discharging end, the voltage output end of the first rectifier bridge module and the voltage output end of the second rectifier bridge module are both electrically connected to the voltage input end of the step-down circuit, the first enable end of the first rectifier bridge module and the first enable end of the second rectifier bridge module are both electrically connected to the first signal output end of the signal control circuit, the second enable end of the first rectifier bridge module and the second enable end of the second rectifier bridge module are both electrically connected to the second signal output end of the signal control circuit, and the voltage output end of the step-down module is electrically connected to the voltage input end of the voltage control circuit and the first power supply end of the signal control circuit; The first rectifier bridge module is used to convert the charging voltage from an AC voltage to a DC voltage to obtain a target charging voltage when receiving the charging voltage from the charging end; The second rectifier bridge module is used for converting the discharge voltage from an AC voltage to a DC voltage to obtain a target discharge voltage when receiving the discharge voltage from the discharge end; The voltage reduction module is used to reduce the received target charging voltage or target discharging voltage to obtain a first supply voltage for the voltage control circuit.

4. The circuit for realizing charge-discharge switching according to any one of claims 1 to 3, characterized in that: The signal control circuit includes a signal control chip, a first switch control circuit and a second switch control circuit, wherein: The signal input end of the first switch control circuit is electrically connected to the first signal output end of the signal control chip, the signal input end of the second switch control circuit is electrically connected to the second signal output end of the signal control chip, the signal output end of the first switch control circuit is electrically connected to the first enable end of the first rectifier bridge module in the rectifier circuit and the first enable end of the second rectifier bridge module in the rectifier circuit, the signal output end of the second switch control circuit is electrically connected to the second enable end of the first rectifier bridge module and the second enable end of the second rectifier bridge module, the power supply end of the first switch control circuit and the power supply end of the second switch control circuit are both electrically connected to the voltage output end of the buck module in the rectifier circuit, the signal input end of the signal control chip is electrically connected to the signal output end of the signal detection circuit, and the power supply end of the signal control chip is electrically connected to the voltage output end of the voltage control circuit; The signal control chip is used to receive the target signal, and output a conduction control signal for the first switch control circuit and the second switch control circuit according to the target signal, and control the conduction of the first switch control circuit and the second switch control circuit according to the conduction control signal, so as to realize the charging end or the discharging end performing corresponding charging and discharging operations through the rectifier circuit.

5. The circuit for realizing charge-discharge switching according to claim 4, characterized in that: The first switch control circuit includes a first switch device, a second switch device, a first diode, a first capacitor, a first resistor and a second resistor, wherein: One end of the first resistor is electrically connected to the first signal output end of the signal control chip, the other end of the first resistor is electrically connected to the first pole of the first switching device, one end of the second resistor and one end of the first capacitor, the second pole of the first switching device is electrically connected to the positive pole of the first diode and the first pole of the second switching device, the negative pole of the first diode and the second pole of the second switching device are both electrically connected to the voltage output end of the step-down module, the third pole of the second switching device is electrically connected to the first enable end of the first rectifier bridge module and the first enable end of the second rectifier bridge module, the third pole of the second switching device is electrically connected to the first enable end of the first rectifier bridge module, and the fourth pole of the second switching device is electrically connected to the first enable end of the second rectifier bridge module, and the third pole of the first switching device, the other end of the second resistor and the other end of the first capacitor are all used for grounding.

6. The circuit for realizing charge-discharge switching according to claim 4, characterized in that: The signal control circuit further includes a parameter detection circuit, a voltage input terminal of the parameter detection circuit is electrically connected to a voltage output terminal of the voltage control circuit, and a signal output terminal of the parameter detection circuit is electrically connected to a third signal input terminal of the signal control chip, wherein: The parameter detection circuit is used to output corresponding parameter detection signals to the signal control chip according to the components of the parameter detection circuit, so that the signal control chip can perform safety detection on the process of the charging and discharging operation.

7. The circuit for realizing charge-discharge switching according to claim 6, characterized in that: The number of the parameter detection circuits is greater than 1, and each of the parameter detection circuits is connected in parallel with each other; Wherein, each of the parameter detection circuits includes one of a current detection circuit, a voltage detection circuit, a leakage detection circuit and a temperature detection circuit.

8. The circuit for realizing charge-discharge switching according to claim 6 or 7, characterized in that: The signal control circuit further comprises a state display control circuit, wherein the power supply end of the state display control circuit is electrically connected to the voltage output end of the step-down module, and the signal input end of the state display control circuit is electrically connected to the third signal output end of the signal control chip; The state display control circuit is used to receive the target display signal sent by the signal control chip, and according to the target display signal, control the state display control circuit to perform a state display operation corresponding to the target display signal.

9. The circuit for realizing charge-discharge switching according to claim 7, characterized in that: The number of the status display control circuits is greater than 1, and each of the status display control circuits is connected in parallel.

10. A charging and discharging device, comprising a device body, characterized in that: The charging and discharging device also includes a circuit for realizing charging and discharging switching as described in any one of claims 1-9.

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