Circuit for implementing charge-discharge switching and charge-discharge device

Abstract

The application relates to the technical field of electric vehicle charging and discharging guns, and discloses a circuit for realizing charging and discharging switching and a charging and discharging device, wherein a rectifier circuit outputs a first power supply voltage for a voltage control circuit according to a voltage received by an input end of the rectifier circuit, and outputs a target signal for a signal control circuit according to the voltage; the voltage control circuit reduces the first power supply voltage to obtain a second power supply voltage, and provides the second power supply voltage to the signal control circuit; the signal control circuit controls a charging end or a discharging end to perform corresponding charging and discharging operations through the rectifier circuit according to the target signal, the automatic switching of the charging and discharging modes can be realized based on the received voltage, the application demands of different input ends can be met, manual replacement of the charging and discharging gun is not needed, the charging and discharging efficiency is improved, the number of gun heads can be reduced through the circuit designed by the scheme, the cost of the gun heads is reduced, and then the charging and discharging cost of the charging and discharging device is reduced.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle charging and discharging gun technology, and in particular to a circuit and charging and discharging device for realizing charging and discharging switching. Background Technology

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

[0003] However, in practice, it has been found that traditional electric vehicle charging and discharging equipment designed with two charging heads typically requires users to manually switch charging and discharging modes according to actual needs. Specifically, users manually select the desired charging head and manually insert it into the corresponding interface, which is detrimental to charging and discharging efficiency. Furthermore, each charging head is costly, easily leading to high charging and discharging costs for the equipment. Therefore, proposing a technical solution that improves charging and discharging efficiency while reducing the cost of the charging and discharging equipment is particularly important. Summary of the Invention

[0004] This invention provides a circuit and a charging / discharging device for switching between charging and discharging modes, which can achieve automatic switching of charging and discharging modes without the need for manual replacement of the charging / discharging gun, thereby improving charging and discharging efficiency and reducing the charging and discharging cost of the charging / discharging device.

[0005] To address the aforementioned technical problems, the first aspect of this invention discloses a method for implementing charge-discharge switching, wherein the circuit includes a signal control circuit, a rectifier circuit, and a voltage control circuit, wherein:

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

[0007] The rectifier circuit is used to output a first supply voltage for the voltage control circuit based on the voltage received at the input terminal of the rectifier circuit, and to output a target signal for the signal control circuit based on the voltage at the input terminal. The voltage at the input terminal includes a charging voltage from the charging terminal or a discharging voltage from the discharging terminal, and the target signal includes 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 power supply voltage to obtain a second power supply voltage, and to provide the second power 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. The charging and discharging operations include the charging operation corresponding to the charging signal or the discharging operation 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 terminal of the rectifier circuit is used to electrically connect to the charging terminal, the second input terminal of the rectifier bridge circuit and the input terminal of the signal detection circuit are both used to electrically connect to the discharging terminal, the signal output terminal of the signal detection circuit is electrically connected to the signal input terminal of the signal control circuit, the voltage output terminal of the rectifier bridge circuit is electrically connected to the voltage input terminal of the voltage control circuit and the first power supply terminal of the signal control circuit, and the enable terminal of the rectifier bridge circuit is electrically connected to the signal output terminal of the signal control circuit.

[0012] The rectifier bridge circuit is used to convert the charging voltage or the discharging voltage when it receives the charging voltage from the charging terminal or the discharging voltage from the discharging terminal to obtain a first supply voltage for the voltage control circuit.

[0013] The signal detection circuit is configured to output a charging signal corresponding to the charging voltage to the signal control circuit when a charging voltage is received from the charging terminal, and to output a discharge signal corresponding to the discharge voltage to the signal control circuit when a discharge voltage is received from the discharging terminal.

[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 terminal and the second input terminal of the first rectifier bridge module are both electrically connected to the charging terminal. The first input terminal and the second input terminal of the second rectifier bridge module are both electrically connected to the discharging terminal. The voltage output terminal of the first rectifier bridge module and the voltage output terminal of the second rectifier bridge module are both electrically connected to the voltage input terminal of the step-down circuit. The first enable terminal of the first rectifier bridge module and the first enable terminal of the second rectifier bridge module are both electrically connected to the first signal output terminal of the signal control circuit. The second enable terminal of the first rectifier bridge module and the second enable terminal of the second rectifier bridge module are both electrically connected to the second signal output terminal of the signal control circuit. The voltage output terminal of the step-down module is electrically connected to the voltage input terminal of the voltage control circuit and the first power supply terminal of the signal control circuit.

[0016] The first rectifier bridge module is used to convert the charging voltage from AC voltage to DC voltage to obtain the target charging voltage when it receives the charging voltage from the charging terminal.

[0017] The second rectifier bridge module is used to convert the discharge voltage from AC voltage to DC voltage to obtain the target discharge voltage when it receives the discharge voltage from the discharge terminal.

[0018] The step-down module is used to step down 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 terminal of the first switch control circuit is electrically connected to the first signal output terminal of the signal control chip, the signal input terminal of the second switch control circuit is electrically connected to the second signal output terminal of the signal control chip, the signal output terminal of the first switch control circuit is electrically connected to the first enable terminal of the first rectifier bridge module and the first enable terminal of the second rectifier bridge module in the rectifier circuit, the signal output terminal of the second switch control circuit is electrically connected to the second enable terminal of the first rectifier bridge module and the second enable terminal of the second rectifier bridge module, the power supply terminals of the first switch control circuit and the second switch control circuit are both electrically connected to the voltage output terminal of the step-down module in the rectifier circuit, the signal input terminal of the signal control chip is electrically connected to the signal output terminal of the signal detection circuit, and the power supply terminal of the signal control chip is electrically connected to the voltage output terminal 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 first switch control circuit and the second switch control circuit to conduct according to the conduction control signal, so as to realize that the charging end or the discharging end performs the corresponding charging and discharging operation through the rectifier circuit.

[0022] As an optional implementation, in a 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 terminal of the signal control chip. The other end of the first resistor is electrically connected to the first terminal of the first switching device, one end of the second resistor, and one end of the first capacitor. The second terminal of the first switching device is electrically connected to the positive terminal of the first diode and the first terminal of the second switching device. The negative terminal of the first diode and the second terminal of the second switching device are both electrically connected to the voltage output terminal of the step-down module. The third terminal of the second switching device is electrically connected to the first enable terminal of the first rectifier bridge module and the first enable terminal of the second rectifier bridge module. The fourth terminal of the second switching device is electrically connected to the first enable terminal of the second rectifier bridge module. The third terminal of the first switching device, the other end of the second resistor, and the other end of the first capacitor are all grounded.

[0024] As an optional implementation, in the first aspect of the present invention, the signal control circuit further includes a parameter detection circuit, wherein the voltage input terminal of the parameter detection circuit is electrically connected to the voltage output terminal of the voltage control circuit, and the signal output terminal of the parameter detection circuit is electrically connected to the 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 each component of the parameter detection circuit, so that the signal control chip can perform safety detection on the charging and discharging operation process.

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

[0027] Each of the parameter detection circuits includes one of a current detection circuit, a voltage detection circuit, a leakage current 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 status display control circuit, wherein the power supply terminal of the status display control circuit is electrically connected to the voltage output terminal of the step-down module, and the signal input terminal of the status display control circuit is electrically connected to the third signal output terminal of the signal control chip.

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

[0031] The second aspect of the present invention discloses a charging and discharging device, the charging and discharging device including a device body, and the charging and discharging device further including a circuit for realizing charging and discharging switching as described in any of the claims of the first aspect of the present invention.

[0032] Implementing this invention has the following beneficial effects:

[0033] This invention provides a circuit for switching between charging and discharging. The circuit includes a signal control circuit, a rectifier circuit, and a voltage control circuit. The first input terminal of the rectifier circuit is electrically connected to the charging terminal, and the second input terminal is electrically connected to the discharging terminal. The first signal output terminal of the rectifier circuit is electrically connected to the first signal input terminal of the signal control circuit, and the second signal output terminal is electrically connected to the second signal input terminal of the signal control circuit. The voltage output terminal of the rectifier circuit is electrically connected to both the voltage input terminals of the voltage control circuit and the signal control circuit. The voltage output terminal of the voltage control circuit is electrically connected to the power supply terminal of the control circuit, and the enable terminal of the rectifier circuit is electrically connected to the signal output terminal of the signal control circuit. The rectifier circuit is used to control the charging and discharging of the signal circuit according to the input signal. The voltage received at the input terminal is used to output a first supply voltage for the voltage control circuit, and a target signal for the signal control circuit is output based on the input voltage. The input voltage includes a charging voltage from the charging terminal or a discharging voltage from the discharging terminal, and the target signal includes 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, based on the target signal, control the charging terminal or the discharging terminal to perform corresponding charging and discharging operations through the rectifier circuit. The charging and discharging operations include a charging operation corresponding to the charging signal or a discharging operation corresponding to the discharging signal. Therefore, this invention can automatically switch charging and discharging modes based on the received voltage, meeting the application requirements of different input terminals without requiring manual replacement of the charging and discharging gun, which is beneficial for improving charging and discharging efficiency. Furthermore, the circuit designed in this solution can reduce the number of charging and discharging gun heads, lowering the cost of the gun heads and thus reducing the charging and discharging cost of the charging and discharging equipment. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of a circuit for implementing charge-discharge switching disclosed in an embodiment of the present invention;

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

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

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

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

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

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

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

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

[0044] Figure 10 This is a schematic diagram of the structure of a current detection circuit disclosed in an embodiment of the present invention;

[0045] Figure 11 This is a schematic diagram of the structure of a voltage detection circuit disclosed in an embodiment of the present invention;

[0046] Figure 12 This is a schematic diagram of a leakage current detection circuit disclosed in an embodiment of the present invention;

[0047] Figure 13 This is a schematic diagram of the structure of a temperature detection circuit disclosed in an embodiment of the present invention;

[0048] Figure 14 This is a schematic diagram of another circuit for implementing charge-discharge switching disclosed in an embodiment of the present invention;

[0049] Figure 15 This is a schematic diagram of the structure of a pulse width modulation circuit disclosed in an embodiment of the present invention;

[0050] Figure 16 This is a schematic diagram of the structure of a pulse signal detection circuit disclosed in an embodiment of the present invention;

[0051] Figure 17 This is a logic diagram of the change in pulse signal connection with a vehicle and the control output disclosed in an embodiment of the present invention;

[0052] Figure 18 This is a schematic diagram of the structure of a status display control circuit disclosed in an embodiment of the present invention;

[0053] Figure 19 This is a schematic diagram of the structure of a signal control chip disclosed in an embodiment of the present invention;

[0054] Figure 20 This is a graph showing the relationship between the vehicle interface connection status and the RC resistance value, as disclosed in an embodiment of the present invention.

[0055] Figure 21 This is a schematic diagram of the structure of a charging and discharging device disclosed in an embodiment of the present invention. Detailed Implementation

[0056] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] It should be noted that, unless otherwise explicitly specified and limited, the term "electrical connection" in the specification, claims, and accompanying drawings of this invention should be interpreted broadly. For example, it can refer to 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 a connection capable of communication; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection of two elements or the interaction between two elements. Furthermore, the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. The terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] Example 1

[0059] Please see Figure 1 , Figure 1 This is a schematic diagram of a circuit for implementing charge-discharge switching, as disclosed in an embodiment of the present invention. Wherein, Figure 1 The described circuit for implementing charge / discharge switching can be applied to any product that requires charging and discharging of an electric vehicle; the embodiments of this invention are not limited thereto. Figure 1 As shown, the circuit for implementing charge / discharge switching includes a signal control circuit 101, a rectifier circuit 102, and a voltage control circuit 103, wherein:

[0060] The first input terminal of the rectifier circuit 102 is used to electrically connect to the charging terminal, the second input terminal of the rectifier circuit 102 is used to electrically connect to the discharging terminal, the signal output terminal of the rectifier circuit 102 is electrically connected to the signal input terminal of the signal control circuit 101, the voltage output terminal of the rectifier circuit 102 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, the voltage output terminal of the voltage control circuit 103 is electrically connected to the second power supply terminal of the signal control circuit 101, and the enable terminal of the rectifier circuit 102 is electrically connected to the signal output terminal 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 based on the voltage received at the input terminal of the rectifier circuit 102, and to output a target signal for the signal control circuit 101 based on the voltage at the input terminal.

[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 to 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, based on the target signal, control the charging end or the discharging end to perform corresponding charging and discharging operations through the rectifier circuit 102.

[0064] In this embodiment of the invention, the charging end can be an interface of the power grid (such as the mains power grid). The discharging end can be a discharge interface of the tram (such as a discharge power strip or a charging adapter).

[0065] In this embodiment of the invention, optionally, the input terminals of the rectifier circuit 102 include a first input terminal and a second input terminal. The first input terminal of the rectifier circuit 102 can receive a charging voltage from the charging terminal, and the second input terminal can receive a discharging voltage from the discharging terminal. The voltage at the input terminal includes either the charging voltage from the charging terminal or the discharging voltage from the discharging terminal. The target signal includes either a charging signal corresponding to the charging voltage or a discharging signal corresponding to the discharging voltage. Specifically, when the received voltage is a charging voltage, the output target signal is the charging signal corresponding to the charging voltage; when the received voltage is a discharging voltage, the output target signal is the discharging signal corresponding to the discharging voltage. It should be noted that the charging voltage from the charging terminal and the discharging voltage from the discharging terminal are not simultaneously sent to the rectifier circuit 102.

[0066] In this embodiment of the 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 terminal is controlled to perform a charging operation on the discharging terminal through the rectifier circuit 102 according to the charging signal corresponding to the charging voltage from the charging terminal; when the target signal is a discharging signal, the discharging terminal 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 terminal.

[0067] It is evident that implementation Figure 1 The described circuit for switching between charging and discharging modes can output a first supply voltage for the voltage control circuit 103 based on the voltage received at the input terminal of the rectifier circuit 102, and output a target signal for the signal control circuit 101 based on the voltage at the input terminal. The voltage control circuit 103 reduces the received first supply voltage to obtain a second supply voltage and provides the second supply voltage to the signal control circuit 101. The signal control circuit 101 receives the target signal and controls the charging terminal or the discharging terminal to perform corresponding charging and discharging operations through the rectifier circuit 102 based on the target signal. It can automatically switch between charging and discharging modes based on the received voltage, meet the application requirements of different input terminals, eliminate the need for manual replacement of the charging and discharging gun, improve charging and discharging efficiency, and reduce the number of charging and discharging gun heads, thereby reducing the cost of the charging and discharging equipment.

[0068] In an optional embodiment, such as Figure 2 and Figure 3 As shown, Figure 2 This is a schematic diagram of the structure of a rectifier circuit disclosed in an embodiment of the present invention. Figure 3 This is a schematic diagram of a signal detection circuit disclosed in an embodiment of the present invention. The rectifier circuit 102 includes a rectifier bridge circuit 1021 and a signal detection circuit 1022, wherein:

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

[0070] The rectifier bridge circuit 1021 is used to convert the charging voltage or the discharging voltage when it receives the charging voltage from the charging terminal or the discharging voltage from the discharging terminal to obtain a first supply voltage for the voltage control circuit 103.

[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 a charging voltage is received from the charging terminal, and to output a discharge signal corresponding to the discharge voltage to the signal control circuit 101 when a discharge voltage is received from the discharging terminal.

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

[0073] As can be seen, this optional embodiment can convert the charging voltage or the discharging voltage received from the charging terminal or the discharging terminal by the rectifier bridge circuit 1021 to obtain a first supply voltage for the voltage control circuit 103. By setting the rectifier bridge circuit 1021, the voltages output from the charging terminal and the discharging terminal can be converted to provide an accurate activation voltage for subsequent charging and discharging operations. When the signal detection circuit 1022 receives the charging voltage from the charging terminal, it outputs a charging signal corresponding to the charging voltage to the signal control circuit 101, and when it receives the discharging voltage from the discharging terminal, it 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 thus facilitates 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 method, such as Figure 2 , Figure 4 and Figure 5 As shown, Figure 4 This is a schematic diagram of a rectifier bridge circuit disclosed in an embodiment of the present invention. Figure 5 This is a schematic diagram of a voltage control circuit disclosed in an embodiment of the present invention. The rectifier bridge circuit 1021 includes a first rectifier bridge module 10211, a second rectifier bridge module 10212, and a step-down module 10213.

[0075] The first input terminal L1-IN and the second input terminal N / L2-IN of the first rectifier bridge module 10211 are both electrically connected to the charging terminal. The first input terminal L1-OUT and the second input terminal N / L2-OUT of the second rectifier bridge module 10212 are both electrically connected to the discharging terminal. The voltage output terminals of the first rectifier bridge module 10211 and 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 terminals of the first rectifier bridge module 10211 and the second enable terminals of the second rectifier bridge module 10212 are both electrically connected to the second signal output terminal of the signal control circuit 101. The voltage output terminal of the step-down module 10213 (e.g., ...) Figure 4 The +12V terminal 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 to convert the charging voltage from AC voltage to DC voltage to obtain the target charging voltage when it receives the charging voltage from the charging terminal.

[0077] The second rectifier bridge module 10212 is used to convert the discharge voltage from AC voltage to DC voltage to obtain the target discharge voltage when it receives the discharge voltage from the discharge terminal.

[0078] The step-down module 10213 is used to step down 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 terminal outputs a 220V AC charging voltage, the first rectifier bridge module 10211 can convert the 220V AC charging voltage into a 220V DC charging voltage (i.e., the target charging voltage mentioned above); when the discharging terminal outputs a 220V AC discharging voltage, the second rectifier bridge module 10212 can convert the 220V AC discharging voltage into a 220V DC discharging voltage (i.e., the target discharging voltage mentioned above), and then the step-down module 10213 steps down the received 220V DC voltage (which includes either a 220V AC discharging voltage or a 220V DC discharging voltage) to a 12V DC voltage (i.e., the first supply voltage mentioned above), and then the voltage control circuit 103 steps down the 12V DC voltage to a 5V DC voltage (e.g., the target discharging voltage mentioned above). Figure 5 (+5V in the middle).

[0080] As can be seen, this optional implementation can convert the charging voltage from AC to DC to obtain the target charging voltage when the first rectifier bridge module 10211 receives the charging voltage from the charging end; and convert the discharging voltage from AC to DC to obtain the target discharging voltage when the second rectifier bridge module 10212 receives the discharging voltage from the discharging end; and step down the received target charging voltage or target discharging voltage through the step-down module 10213 to obtain the first supply voltage for the voltage control circuit 103. By setting two rectifier bridges at the charging end and the discharging end, the AC voltage output from the charging end or the discharging end can be accurately converted into DC voltage. Furthermore, by setting the step-down module 10213 to step down the DC voltage to a suitable voltage, the voltage control circuit 103 can provide an accurate supply voltage to the signal control circuit 101 based on the suitable voltage. This is beneficial for activating the signal control circuit 101, and thus for 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 voltage, without the need for manual start-up.

[0081] In another alternative embodiment, such as Figure 6 , Figure 7 and Figure 8 As shown, Figure 6 This is a schematic diagram of the structure of a signal control circuit disclosed in an embodiment of the present invention. Figure 7 This is a schematic diagram of the structure of a first switch control circuit disclosed in an embodiment of the present invention. Figure 8 This is a schematic diagram of a second switch control circuit disclosed in an embodiment of the present invention. 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 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. The power supply terminal of the first switch control circuit 1012 (e.g., Figure 7The +12V in the middle) and the power supply terminal of the second switch control circuit 1013 (such as the ... Figure 7 The +12V voltage in the rectifier circuit 102 is electrically connected to the voltage output terminal of the step-down module 10213 in the rectifier circuit 102 (e.g., +12V). 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 (e.g., +12V). Figure 5 +5V);

[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 first switch control circuit 1012 and the second switch control circuit 1013 to conduct according to the conduction control signal, so as to realize that the charging end or the discharging end performs the corresponding charging and discharging operation through the rectifier circuit 102.

[0084] In this optional embodiment, optionally, such 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 terminal of the first switching device Q5, one end of the second resistor R54, and one end of the first capacitor C18. The second terminal of the first switching device Q5 is electrically connected to the positive terminal of the first diode D3 and the first terminal of the second switching device RL1. The negative terminal of the first diode D3 and the second terminal of the second switching device RL1 are both electrically connected to the voltage output terminal of the step-down module 10213. The third terminal of the second switching device RL1 is electrically connected to the first enable terminal of the first rectifier bridge module 10211, and the fourth terminal of the second switching device RL1 is electrically connected to the first enable terminal of the second rectifier bridge module 10212. The third terminal of the first switching device Q5, the other end of the second resistor R54, and the other end of the first capacitor C18 are all grounded.

[0086] In this embodiment of the invention, optionally, the first switching device Q5 can be a transistor, a MOSFET, or any other device or component that can perform the same switching function, and the second switching device RL1 can be a relay. The relay can automatically engage when the signal control chip 1011 controls the first switching device Q5 to conduct, thereby turning on the first enable terminal of the first rectifier bridge module 10211 and the first enable terminal of the second rectifier bridge module 10212, thus turning on the charging terminal and the discharging terminal, and enabling the charging terminal or the discharging terminal to perform the corresponding charging and discharging operation through the rectifier circuit 102 after it is turned on.

[0087] Optionally, this optional embodiment can receive the target signal through the signal control chip 1011, and output conduction control signals (KM1 and KM2) for the first switch control circuit 1012 and the second switch control circuit 1013 according to the target signal. It can also control the first switch control circuit 1012 and the second switch control circuit 1013 to conduct according to the conduction control signals, so that the enable terminal of the rectifier circuit 102 is turned on, thereby turning on the charging terminal and the discharging terminal. This enables the charging terminal or the discharging terminal to perform corresponding charging and discharging operations through the rectifier circuit 102, and can accurately realize the corresponding charging and discharging process of the charging terminal or the discharging terminal based on the conduction control signals of the signal control chip 1011.

[0088] The working principle of the circuit used to achieve charge / discharge switching in this invention is as follows:

[0089] In this embodiment of the invention, when the charging terminal (e.g., a mains interface) is powered on, the charging voltage (e.g., 220V AC voltage) output by the charging terminal is converted into a target charging voltage (e.g., 220V DC voltage) by the first rectifier bridge module 10211, and then the target charging voltage is stepped down to a first supply voltage (e.g., +12V) by the step-down module 10213 to supply power to the first switch control circuit 1012 and the second switch control circuit 1013. Additionally, the first supply voltage is stepped down to a second supply voltage (e.g., +5V) by the voltage control circuit 103 to supply power to the signal control circuit 101. When the control chip 1011 is powered, the signal control circuit 101, under the second power supply voltage, receives the charging signal output by the signal detection circuit 1022 based on the charging voltage, thereby determining that the overall circuit mode is charging 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 switching devices Q5 and Q6 in the two switch control circuits are turned on, thereby energizing the relays RL1 and RL2 in the two switch control circuits, and thus enabling the charging terminal to discharge the terminal (such as an electric discharge terminal) through the energized relays. The vehicle's discharge interface performs a charging operation; when the discharge terminal is energized, the discharge voltage (e.g., 220V AC voltage) output from the discharge terminal is converted into a target charging voltage (e.g., 220V DC voltage) by the second rectifier bridge module 10212, and then stepped down to a first supply voltage (e.g., +12V) by the step-down module 10213 to power the first switch control circuit 1012 and the second switch control circuit 1013, and the first supply voltage is stepped down to a second supply voltage (e.g., +5V) by the voltage control circuit 103 to power the signal control circuit 101. When the chip 1011 is powered, the signal control circuit 101, under the second power supply voltage, receives the discharge signal output by the signal detection circuit 1022 based on the discharge voltage, thereby determining that the overall circuit mode is 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, causing the switching devices Q5 and Q6 in the two switch control circuits to conduct, thereby causing the relays RL1 and RL2 in the two switch control circuits to engage, and thus enabling the discharge terminal to perform external discharge operation through the engaged relays. This solution can realize automatic switching of charging and discharging modes based on the received voltage, which can meet the application requirements of different input terminals. It eliminates the need for manual replacement of the charging and discharging gun, which is beneficial to improving charging and discharging efficiency. Furthermore, the circuit designed in this solution can reduce the number of charging and discharging gun heads, thereby reducing the cost of the gun heads and thus reducing the charging and discharging cost of the charging and discharging equipment.

[0090] Example 2

[0091] Please see Figure 9 , Figure 9 This is a schematic diagram of another signal control circuit disclosed in an embodiment of the present invention. Figure 9 The described signal control circuit 101 is used in a circuit for implementing charge / discharge switching, that is... Figure 9 The signal control circuit 101 shown is a more specific circuit structure of the signal control circuit 101 in Embodiment 1. For example... Figure 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. The signal control circuit 101 also includes a parameter detection circuit 1014. The voltage input terminal of the parameter detection circuit 1014 is electrically connected to the voltage output terminal of the voltage control circuit 103, and the signal output terminal of the parameter detection circuit 1014 is electrically connected to the third signal input terminal of the signal control chip 1011.

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

[0093] It is evident that implementation Figure 9 The circuit used in the described signal control circuit 101 for switching between charging and discharging can output corresponding parameter detection signals to the signal control chip 1011 based on the components of the parameter detection circuit 1014. This allows the signal control chip 1011 to perform safety checks on the charging and discharging operation. Only when the circuit parameters are found to meet safety standards will the signal control chip 1011 output 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 charging and discharging operation can be accurately detected before the signal control chip 1011 controls the charging or discharging end to perform the corresponding charging or discharging operation, which helps to improve the control safety of the charging and discharging 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 with each other; wherein each of the parameter detection circuits 1014 includes one of a current detection circuit, a voltage detection circuit, a leakage current detection circuit, and a temperature detection circuit.

[0095] For example, such as Figures 10-13 As shown, Figure 10 This is a schematic diagram of the structure of a current detection circuit disclosed in an embodiment of the present invention. Figure 11 This is a schematic diagram of the structure of a voltage detection circuit disclosed in an embodiment of the present invention. Figure 12 This is a schematic diagram of a leakage current detection circuit disclosed in an embodiment of the present invention. Figure 13 This is a schematic diagram of a temperature detection circuit disclosed in an embodiment of the present invention. Specifically, in conjunction with... Figure 10 The signal control chip 1011 detects whether the current signal CI output by the current detection circuit exceeds the preset output current (e.g., 1.1 * standard output current) to determine if there is an overcurrent. Combined with... Figure 11 The signal control chip 1011 detects whether the voltage signal CV output by the voltage detection circuit is greater than the overvoltage value to determine if there is an overvoltage. Combined with... Figure 12 The leakage current detection circuit outputs a corresponding leakage current detection signal LK to the signal control chip 1011 based on whether the difference between the current vector and the L / N line connected to the rectifier bridge circuit 1021 reaches 30mA. The signal control chip 1011 then determines whether there is a leakage current based on the leakage current detection signal LK. Figure 13 Through the temperature sensing element set in the temperature detection circuit, such as using Figure 13 The NTC (negative temperature coefficient) thermistors R39 and R38 in the sample, at temperatures (e.g., ... Figure 13 When the voltage across the NTC increases (T1 and T2), the NTC resistance decreases. At this time, the signal control chip 1011 detects that the voltage across the NTC has decreased. When the voltage decreases to the threshold, the signal control chip 1011 determines that the entire circuit is in an over-temperature state.

[0096] In this optional embodiment, such as Figure 14 As shown, Figure 14 This is a schematic diagram of another circuit for implementing charge / discharge switching disclosed in an embodiment of the present invention. The circuit for implementing 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 as shown below... Figure 15 , Figure 16 and Figure 17 As shown, Figure 15 This is a schematic diagram of a pulse width modulation circuit disclosed in an embodiment of the present invention. Figure 16 This is a schematic diagram of the structure of a pulse signal detection circuit disclosed in an embodiment of the present invention. Figure 17 This is a logic diagram of the change in pulse signal connection with a vehicle and the control output disclosed in an embodiment of the present invention, wherein the voltage input terminal of the pulse width modulation circuit 104 (e.g. Figure 15 The +12V voltage in the rectifier circuit 102 is electrically connected to the voltage output terminal of the step-down module 10213 in the rectifier circuit 102, and the voltage output terminal of the pulse width modulation circuit 104 (e.g., +12V) is connected to the voltage output terminal of the step-down module 10213 in the rectifier circuit 102. Figure 15 The -12V) electrical connection is made to the first power supply terminal of the pulse signal detection circuit 1016 (e.g., ...). Figure 15-12V), the second power supply terminal of the pulse signal detection circuit 1016 (such as... Figure 16 The +12V electrical connection is used to connect the voltage output terminal of the voltage module and the signal input terminal of the pulse signal detection circuit 1016 (e.g., ...). Figure 16 The PWM_CTR and CC signals in the signal control chip 1011 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 supply voltage output by the buck module 10213, modulate the first supply voltage to obtain the modulated first supply voltage, and send the modulated first supply voltage to the pulse signal detection circuit 1016. The pulse signal detection circuit 1016 is used to output a 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 supply voltage, so that the signal control chip 1011 can make a pulse detection signal according to the signal output of the signal control chip 1011. Figure 17 The logic diagram shown determines 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 to be adjusted 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 the automatic switching of charging and discharging operations.

[0097] As can be seen, this optional embodiment can achieve the accuracy, flexibility and diversity of signal control chip 1011 in detecting multiple parameters by providing multiple parameter detection circuits 1014, which is conducive to ensuring the safety of the overall circuit operation process, and the comprehensive parameter detection circuit is conducive to realizing the comprehensive protection function of the overall circuit.

[0098] In another alternative embodiment, such as Figure 9 and Figure 14 As shown, the signal control circuit 101 further includes a status display control circuit 1015, wherein the power supply terminal of the status display control circuit 1015 is electrically connected to the voltage output terminal of the step-down module 10213 (e.g., ...). Figure 4 The signal input terminal of the status display control circuit 1015 is electrically connected to the third signal output terminal of the signal control chip 1011 (+12V in the circuit). The status display control circuit 1015 is used to receive the target display signal sent by the signal control chip 1011, and control the status display control circuit 1015 to perform a status display operation corresponding to the target display signal according to the target display signal.

[0099] In this optional embodiment, the number of status display control circuits 1015 may be greater than one, and each of the status display control circuits 1015 may be connected in parallel with each other. Optionally, each status display control circuit 1015 may include one of a standby display control circuit, a running display control circuit, and a fault display control circuit.

[0100] For example, such as Figure 18 As shown, Figure 18 This is a schematic diagram of a status display control circuit disclosed in an embodiment of the present invention. When the signal input terminal G of the standby display control circuit receives a standby display signal output from the signal control chip 1011, the standby display control circuit indicates that the signal control chip 1011 is in a standby state, such as by illuminating a green light. When the signal input terminal B of the running display control circuit receives a running display signal output from the signal control chip 1011, the running display control circuit indicates that the signal control chip 1011 is in a running state, such as by illuminating a blue light when the charging gun is inserted, or by flashing a blue light during charging. When the signal input terminal R of the fault display control circuit receives a fault display signal output from the signal control chip 1011, the fault display control circuit indicates that the entire circuit is in a fault state, such as by illuminating a red light. Different faults correspond to different numbers of red light illuminations (e.g., one red light illumination for overcurrent, two red light illuminations for overvoltage).

[0101] As can be seen, this optional embodiment, by setting multiple status display control circuits 1015, can achieve accuracy, diversity, and flexibility in the status display of the overall circuit. It can quickly and accurately prompt the user with the corresponding status, making it easier for the user to discover abnormal statuses in a timely manner, thereby improving the accuracy and timeliness of maintenance of the overall circuit.

[0102] In this optional life example, such as Figure 19 As shown, Figure 19This is a schematic diagram of a signal control chip disclosed in an embodiment of the present invention. In the signal control chip 1011, the signal KM-C connected to the microcontroller U6 is a detection signal indicating whether there is power at the output of the rectifier circuit 102, and / or a detection signal indicating whether the relay is stuck / refusing to operate. The signal PWM_CTR output by the microcontroller U6 is a CP signal generation signal, used to output to the pulse signal detection circuit 1016. The signal CP_VOLIN connected to the microcontroller U6 is a detection signal indicating whether a CP signal is generated, used for pulse signal detection. The signal CV connected to the microcontroller U6 is a voltage detection signal at the charging / discharging end, used for overvoltage detection. The signal CI connected to the microcontroller U6 is a current detection signal. The signal P1 input to the microcontroller U6 is the detection signal for the discharge connector / charge converter, used for connector insertion detection. (Specifically, P1 is used to electrically connect to the discharge end, and the CC and PE terminals of the connector have a built-in 2K resistor R9. When P1 is electrically connected to the discharge end, resistor R9 and resistor R41 are connected in parallel. The parallel resistance is 1.05KΩ / / 2KΩ = 688Ω. At this time, the vehicle corresponding to the discharge end detects an impedance of 688Ω and communicates with the microcontroller U6 via the CM signal, indicating that the connector insertion is complete.) After the connector insertion, the CM signal sends a graph showing the relationship between the vehicle interface connection status and the RC resistance value to the microcontroller U6, enabling the microcontroller U6 to control the charging current during the charging and discharging operation based on this graph. Figure 20 As shown, Figure 20 This is a diagram showing the relationship between the vehicle interface connection status and the RC resistance value disclosed in an embodiment of the present invention; the signal LK input to the microcontroller U6 is a leakage current detection signal used for leakage detection; the signals T1 and T2 input to the microcontroller U6 are temperature detection signals used for over-temperature detection; the signals R, G, and B output by the microcontroller U6 are indicator light color control signals, used to display the overall circuit status by controlling the indicator light color and the corresponding indicator light color display status (e.g., continuous lighting duration, number of lighting times, etc.) displayed by the control status display control circuit 1015; the signal CC output by the microcontroller U6 is a charging / discharging selection signal, used to determine the current mode of the circuit through the charging / discharging selection signal, specifically: if the current mode is charging mode, the microcontroller U6 sets the CC signal to a high level; if the current mode is discharging mode, the microcontroller U6 sets the CC signal to a low level.

[0103] The working principle of the circuit used to achieve charge / discharge switching in this invention is as follows:

[0104] In this embodiment of the invention, when neither the charging nor discharging end is powered, the standby display control circuit indicates that the signal control chip 1011 is in standby mode (e.g., a green light), and the operation display control circuit indicates whether the charging gun is plugged in (e.g., a blue light). The subsequent process of powering the charging or discharging end only proceeds when the signal control chip 1011 is in standby mode and the charging gun is plugged in. When the charging end (e.g., a mains interface) is powered, the first rectifier bridge module 10211 converts the charging voltage (e.g., 220V AC voltage) output from the charging end into a target charging voltage (e.g., 220V DC voltage). The step-down module 10213 then steps down this target charging voltage to a first supply voltage (e.g., +12V) to power the first switch control circuit 1012 and the second switch control circuit 1013. The voltage control circuit 103 then steps down the first supply voltage to a second supply voltage (e.g., +5V) to power the signal control circuit 101. When the signal control chip 1011 is powered, 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 multi-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, and different fault conditions correspond to different number of times the light is lit). 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 charging voltage, thereby determining that the overall circuit mode 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 switching devices Q5 and Q6 in the two switch control circuits are turned on, thereby causing the relays RL1 and RL2 in the two switch control circuits to be energized, so that the charging end can perform a charging operation on the discharging end (such as the discharge interface of the tram) through the energized relays.When the discharge terminal is energized, the discharge voltage (e.g., 220V AC voltage) output from the discharge terminal is converted into a target charging voltage (e.g., 220V DC voltage) by the second rectifier bridge module 10212. This target charging voltage is then stepped down to a first supply voltage (e.g., +12V) by the step-down module 10213 to power the first switch control circuit 1012 and the second switch control circuit 1013. The first supply voltage is also stepped down to a second supply voltage (e.g., +5V) by the voltage control circuit 103 to power the signal control chip 1011 in the signal control circuit 101. At this time, under the power of the second supply voltage, the signal control circuit 101 first detects the overall circuit's operating parameters through the multi-parameter detection circuit 1014. When at least one operating parameter is detected to be abnormal, the fault status is displayed through the fault display control circuit (e.g., a red light is lit, and different fault conditions correspond to different numbers of light illuminations). 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 overall circuit mode 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 switching devices Q5 and Q6 in the two switch control circuits are turned on, thereby causing the relays RL1 and RL2 in the two switch control circuits to be energized, and thus enabling the discharge terminal to perform external discharge operation through the energized relays. This solution enables automatic switching of charging and discharging modes based on the received voltage, meeting the application requirements of different input terminals. It eliminates the need for manual replacement of the charging and discharging gun, thus improving charging and discharging efficiency. Furthermore, the circuit design reduces the number of charging and discharging gun heads, lowering their cost and consequently reducing the overall cost of the charging and discharging equipment. In addition, by setting up multiple parameter detection circuits 1014 and multiple status display control circuits 1015, the solution accurately detects the operating parameters of the entire circuit and displays its various statuses. This improves the safety of subsequent charging and discharging operations based on the parameter detection circuit 1014, enhances the comprehensiveness of the circuit's protection functions, and allows the status display control circuit 1015 to quickly and accurately alert the user to the corresponding status, enabling timely detection of abnormal conditions and improving the accuracy and timeliness of overall circuit maintenance.

[0105] Example 3

[0106] Please see Figure 21 , Figure 21 This is a schematic diagram of the structure of a charging and discharging device disclosed in an embodiment of the present invention. Figure 20 The described charging and discharging device includes the device body, and Figure 21The described charging and discharging equipment can be applied to any product that requires charging and discharging of electric vehicles; the embodiments of this invention are not limited thereto. Figure 20 As shown, the charging and discharging device also includes a circuit for implementing charge-discharge switching in any one, two, or three of the embodiments of Embodiment 1 or Embodiment 2 of the present invention. It should be noted that for a detailed description of the circuit for implementing charge-discharge switching, please refer to the specific descriptions of the relevant content in Embodiments 1 and 2; this embodiment will not repeat them.

[0107] It is evident that implementation Figure 21 The described charging and discharging device can automatically switch charging and discharging modes based on the received voltage, which can meet the application requirements of different input terminals. It does not require manual replacement of the charging and discharging gun, which helps to improve charging and discharging efficiency. Furthermore, the circuit designed in this solution can reduce the number of charging and discharging gun heads, thereby reducing the cost of the gun heads and thus helping to reduce the charging and discharging cost of the charging and discharging device.

[0108] The foregoing has provided a detailed description of a circuit and charging / discharging device for implementing charge / discharge switching according to embodiments of the present invention. Specific embodiments have been used to illustrate the principles and implementation methods of the present invention. However, the above preferred embodiments are not intended to limit the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is determined by the scope defined in the claims.

Claims

1. A circuit for implementing charge / discharge switching, characterized in that, The circuit includes a signal control circuit, a rectifier circuit, and a voltage control circuit, wherein: The first input terminal of the rectifier circuit is used to electrically connect to the charging terminal, the second input terminal of the rectifier circuit is used to electrically connect to the discharging terminal, the signal output terminal of the rectifier circuit is electrically connected to the signal input terminal of the signal control circuit, the voltage output terminal of the rectifier circuit is electrically connected to the voltage input terminal of the voltage control circuit and the first power supply terminal of the signal control circuit, the voltage output terminal of the voltage control circuit is electrically connected to the second power supply terminal of the signal control circuit, and the enable terminal of the rectifier circuit is electrically connected to the signal output terminal of the signal control circuit. The rectifier circuit is used to output a first supply voltage for the voltage control circuit based on the voltage received at the input terminal of the rectifier circuit, and to output a target signal for the signal control circuit based on the voltage at the input terminal. The voltage at the input terminal includes a charging voltage from the charging terminal or a discharging voltage from the discharging terminal, and the target signal includes 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 power supply voltage to obtain a second power supply voltage, and to provide the second power 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. The charging and discharging operations include the charging operation corresponding to the charging signal or the discharging operation corresponding to the discharging signal. The rectifier circuit includes a rectifier bridge circuit and a signal detection circuit, wherein: The first input terminal of the rectifier circuit is used to electrically connect to the charging terminal, the second input terminal of the rectifier bridge circuit and the input terminal of the signal detection circuit are both used to electrically connect to the discharging terminal, the signal output terminal of the signal detection circuit is electrically connected to the signal input terminal of the signal control circuit, the voltage output terminal of the rectifier bridge circuit is electrically connected to the voltage input terminal of the voltage control circuit and the first power supply terminal of the signal control circuit, and the enable terminal of the rectifier bridge circuit is electrically connected to the signal output terminal of the signal control circuit. The rectifier bridge circuit is used to convert the charging voltage or the discharging voltage when it receives the charging voltage from the charging terminal or the discharging voltage from the discharging terminal to obtain a first supply voltage for the voltage control circuit. The signal detection circuit is configured to output a charging signal corresponding to the charging voltage to the signal control circuit when a charging voltage is received from the charging terminal, and to output a discharge signal corresponding to the discharge voltage to the signal control circuit when a discharge voltage is received from the discharging terminal.

2. The circuit for implementing charge / discharge switching according to claim 1, 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 terminal and the second input terminal of the first rectifier bridge module are both electrically connected to the charging terminal. The first input terminal and the second input terminal of the second rectifier bridge module are both electrically connected to the discharging terminal. The voltage output terminal of the first rectifier bridge module and the voltage output terminal of the second rectifier bridge module are both electrically connected to the voltage input terminal of the step-down module. The first enable terminal of the first rectifier bridge module and the first enable terminal of the second rectifier bridge module are both electrically connected to the first signal output terminal of the signal control circuit. The second enable terminal of the first rectifier bridge module and the second enable terminal of the second rectifier bridge module are both electrically connected to the second signal output terminal of the signal control circuit. The voltage output terminal of the step-down module is electrically connected to the voltage input terminal of the voltage control circuit and the first power supply terminal of the signal control circuit. The first rectifier bridge module is used to convert the charging voltage from AC voltage to DC voltage to obtain the target charging voltage when it receives the charging voltage from the charging terminal. The second rectifier bridge module is used to convert the discharge voltage from AC voltage to DC voltage to obtain the target discharge voltage when it receives the discharge voltage from the discharge terminal. The step-down module is used to step down the received target charging voltage or target discharging voltage to obtain a first supply voltage for the voltage control circuit.

3. The circuit for implementing charge / discharge switching according to claim 1 or 2, 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 terminal of the first switch control circuit is electrically connected to the first signal output terminal of the signal control chip, the signal input terminal of the second switch control circuit is electrically connected to the second signal output terminal of the signal control chip, the signal output terminal of the first switch control circuit is electrically connected to the first enable terminal of the first rectifier bridge module and the first enable terminal of the second rectifier bridge module in the rectifier circuit, the signal output terminal of the second switch control circuit is electrically connected to the second enable terminal of the first rectifier bridge module and the second enable terminal of the second rectifier bridge module, the power supply terminals of the first switch control circuit and the second switch control circuit are both electrically connected to the voltage output terminal of the step-down module in the rectifier circuit, the signal input terminal of the signal control chip is electrically connected to the signal output terminal of the signal detection circuit, and the power supply terminal of the signal control chip is electrically connected to the voltage output terminal 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 first switch control circuit and the second switch control circuit to conduct according to the conduction control signal, so as to realize that the charging end or the discharging end performs the corresponding charging and discharging operation through the rectifier circuit.

4. The circuit for implementing charge / discharge switching according to claim 3, 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 terminal of the signal control chip. The other end of the first resistor is electrically connected to the first terminal of the first switching device, one end of the second resistor, and one end of the first capacitor. The second terminal of the first switching device is electrically connected to the positive terminal of the first diode and the first terminal of the second switching device. The negative terminal of the first diode and the second terminal of the second switching device are both electrically connected to the voltage output terminal of the step-down module. The third terminal of the second switching device is electrically connected to the first enable terminal of the first rectifier bridge module and the first enable terminal of the second rectifier bridge module. The fourth terminal of the second switching device is electrically connected to the first enable terminal of the second rectifier bridge module. The third terminal of the first switching device, the other end of the second resistor, and the other end of the first capacitor are all grounded.

5. The circuit for implementing charge / discharge switching according to claim 3, characterized in that, The signal control circuit further includes a parameter detection circuit. The voltage input terminal of the parameter detection circuit is electrically connected to the voltage output terminal of the voltage control circuit, and the signal output terminal of the parameter detection circuit is electrically connected to the third signal input terminal of the signal control chip. The parameter detection circuit is used to output corresponding parameter detection signals to the signal control chip according to each component of the parameter detection circuit, so that the signal control chip can perform safety detection on the charging and discharging operation process.

6. The circuit for implementing charge / discharge switching according to claim 5, characterized in that, The number of parameter detection circuits is greater than 1, and each of the parameter detection circuits is connected in parallel with each other; Each of the parameter detection circuits includes one of a current detection circuit, a voltage detection circuit, a leakage current detection circuit, and a temperature detection circuit.

7. The circuit for implementing charge / discharge switching according to claim 5 or 6, characterized in that, The signal control circuit further includes a status display control circuit, wherein the power supply terminal of the status display control circuit is electrically connected to the voltage output terminal of the step-down module, and the signal input terminal of the status display control circuit is electrically connected to the third signal output terminal of the signal control chip. The status display control circuit is used to receive the target display signal sent by the signal control chip, and control the status display control circuit to perform a status display operation corresponding to the target display signal according to the target display signal.

8. The circuit for implementing charge / discharge switching according to claim 7, characterized in that, The number of status display control circuits is greater than 1, and each of the status display control circuits is connected in parallel with each other.

9. A charging and discharging device, the charging and discharging device comprising a device body, characterized in that, The charging and discharging device further includes the circuit for switching between charging and discharging as described in any one of claims 1-8.

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