Charging and discharging gun, discharging power strip, charging adapter and charging and discharging system

Abstract

The invention discloses a charging and discharging gun, a discharging power strip, a charging adapter and a charging and discharging system, the charging and discharging gun comprises a gun head end and a pin end, and the pin end is used for plugging the discharging power strip or the charging adapter; the pin end is provided with a first connection confirmation circuit, and the charging and discharging gun is also internally provided with a charging and discharging circuit connected with the first connection confirmation circuit; the first connection confirmation circuit is used for being coupled with a second connection confirmation circuit in the discharge power strip when the pin end is plugged with the discharge power strip, so that the charge and discharge circuit is in a discharge path state; or when the pin end is plugged with the charging adapter, the pin end is coupled with a third connection confirmation circuit in the charging adapter, so that the charging and discharging circuit is in a charging access state. The charging and discharging gun can ensure that the charging and discharging operation is carried out only after the charging and discharging gun is plugged into the discharging socket or the charging adapter, so that the charging and discharging process is safer and more reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle charging and discharging, and particularly to a charging and discharging gun, a discharging socket strip, a charging adapter and a charging and discharging system. Background Art

[0002] At present, new energy electric vehicles are increasingly recognized and chosen by people. With the large-scale application of bidirectional on-board chargers for electric vehicles, most electric vehicles have a 3.5KW discharging function, which provides convenience for outdoor travel and household emergency power use.

[0003] Currently, there are already various models of charging and discharging guns on the market. When the charging and discharging gun is connected between an electric vehicle and an electrical appliance, it can realize the external discharging function; when the charging and discharging gun is connected between an electric vehicle and the mains circuit, it can realize the charging of the electric vehicle. However, in the discharging mode of the existing charging and discharging guns, as long as the charging and discharging gun is inserted into the vehicle end, discharging can be carried out immediately. If the charging and discharging gun is not properly connected to the electrical appliance and is in a suspended state at this time, there will be an electric shock risk; when the existing charging and discharging gun is connected to the mains circuit for charging, it needs to be connected to the mains power socket through an adapter. If it is not connected through an adapter, it will cause problems such as overload of the household power distribution or burning out of the socket. Therefore, the existing charging and discharging guns lack a charging and discharging safety protection mechanism, and there are potential safety hazards during the charging and discharging process. Summary of the Invention

[0004] Embodiments of the present invention provide a charging and discharging gun, a discharging socket strip, a charging adapter and a charging and discharging system to solve the problem that the existing charging and discharging guns lack a charging and discharging safety protection mechanism.

[0005] Embodiments of the present invention provide a charging and discharging gun, including a gun head end and a pin end, and the pin end is used for plugging into a discharging socket strip or a charging adapter; The pin end is provided with a first connection confirmation circuit, and a charging and discharging circuit connected to the first connection confirmation circuit is further provided in the charging and discharging gun; The first connection confirmation circuit is used for coupling with a second connection confirmation circuit in the discharging socket strip when the pin end is plugged into the discharging socket strip, so that the charging and discharging circuit is in a discharging path state; or, coupling with a third connection confirmation circuit in the charging adapter when the pin end is plugged into the charging adapter, so that the charging and discharging circuit is in a charging path state.

[0006] Preferably, when the charging and discharging circuit is in a discharging path state, it includes: the ground wire in the charging and discharging circuit is in a conducting state; When the charging and discharging circuit is in a charging path state, it includes: the ground wire in the charging and discharging circuit is in a conducting state.

[0007] Preferably, the first connection confirmation circuit includes a normally closed magnetic switch; The normally closed magnetic switch is arranged on the ground wire in the charge and discharge circuit and is used for attracting and combining with a first magnet in a second connection confirmation circuit in the discharge socket when the pin end is plugged into the discharge socket, so that the ground wire in the charge and discharge circuit is in a conducting state; or, attracting and combining with a second magnet in a third connection confirmation circuit in the charging adapter when the pin end is plugged into the charging adapter, so that the ground wire in the charge and discharge circuit is in a conducting state.

[0008] Preferably, the first connection confirmation circuit includes a pin socket. The first end of the pin socket is connected to the ground wire in the charge and discharge circuit. The second end of the pin socket is used for plugging into a first pin in the second connection confirmation circuit in the discharge socket when the pin end is plugged into the discharge socket, so that the ground wire in the charge and discharge circuit is in a conducting state; or, plugging into a second pin in the third connection confirmation circuit in the charging adapter when the pin end is plugged into the charging adapter, so that the ground wire in the charge and discharge circuit is in a conducting state.

[0009] Preferably, the charge and discharge circuit includes a main control chip and a mode conversion control circuit; The main control chip is connected to the mode conversion control circuit and is used for outputting a discharge mode conversion signal to the mode conversion control circuit based on the discharge mode, or outputting a charging mode conversion signal to the mode conversion control circuit based on the charging mode; The input end of the mode conversion control circuit is used for connecting to the ground wire, and the output end of the mode conversion control circuit is used for connecting to an electric vehicle. When the ground wire is in a conducting state, a discharge signal is output to the electric vehicle based on the discharge mode conversion signal, or a charging signal is output to the electric vehicle based on the charging mode conversion signal.

[0010] Preferably, the mode conversion control circuit includes a first relay, a first voltage dividing circuit and a second voltage dividing circuit; The control end of the first relay is connected to the main control chip and is used for receiving a discharge mode conversion signal or a charging mode conversion signal; The first relay includes two moving contacts, two first static contacts and two second static contacts; The two moving contacts are respectively used for connecting to the ground wire and the electric vehicle. The two first static contacts are connected to the first voltage dividing circuit, and the two second static contacts are connected to the second voltage dividing circuit; The first relay is configured to control the connection of the two moving contacts to the two first stationary contacts based on the discharge mode conversion signal, so that the first voltage dividing circuit is connected between the ground wire and the electric vehicle, and the mode conversion control circuit outputs a discharge signal to the electric vehicle; or, based on the charging mode conversion signal, control the connection of the two moving contacts to the two second stationary contacts, so that the second voltage dividing circuit is connected between the ground wire and the electric vehicle, and the mode conversion control circuit outputs a charging signal to the electric vehicle.

[0011] Preferably, the charge and discharge circuit further includes a first mode conversion protection circuit and a second mode conversion protection circuit; The main control chip is connected to the first mode conversion protection circuit and the second mode conversion protection circuit, and is configured to output an analog unplug signal to the first mode conversion protection circuit when switching from the discharge mode to the charging mode, or output a disconnect isolation signal to the second mode conversion protection circuit when switching from the charging mode to the discharge mode; The input end of the first mode conversion protection circuit is connected to the output end of the mode conversion control circuit, and the output end of the first mode conversion protection circuit is used to connect to the electric vehicle, and is configured to control the disconnection of the first mode conversion protection circuit from the electric vehicle based on the analog unplug signal, and then reconnect the first mode conversion protection circuit to the electric vehicle after a first preset time; The input end of the second mode conversion protection circuit is used to connect to the charging adapter, and the output end of the second mode conversion protection circuit is used to connect to the electric vehicle, and is configured to disconnect the control pilot signal connection between the charging adapter and the electric vehicle based on the disconnect isolation signal.

[0012] Preferably, the first mode conversion protection circuit includes a second relay; The stationary contacts of the second relay are connected to the output end of the mode conversion control circuit, the moving contacts of the second relay are used to connect to the electric vehicle, the second relay is a normally open relay, and the control end of the second relay is connected to the main control chip and is configured to disconnect when receiving the analog unplug signal.

[0013] Preferably, the second mode conversion protection circuit includes an optocoupler module; The light emitting part of the optocoupler module is connected to the main control chip, the first end of the light receiving part of the optocoupler module is used to connect to the charging adapter, and the second end of the light receiving part of the optocoupler module is used to connect to the electric vehicle, and is configured to turn off when receiving the disconnect isolation signal, and disconnect the control pilot signal connection between the charging adapter and the electric vehicle.

[0014] An embodiment of the present invention further provides a discharge socket strip, including a socket strip body, on which a charging and discharging gun jack is provided; the charging and discharging gun jack is used for plugging with the pin end of a charging and discharging gun; A second connection confirmation circuit is provided in the socket strip body. The second connection confirmation circuit is used for coupling with a first connection confirmation circuit in the charging and discharging gun when the socket strip body is plugged with the charging and discharging gun, so that the charging and discharging circuit in the charging and discharging gun is in a discharge path state.

[0015] An embodiment of the present invention further provides a charging adapter, including an adapter body, on which an adapter jack is provided; the adapter jack is used for plugging with the pin end of a charging and discharging gun; A third connection confirmation circuit is provided in the adapter body. The third connection confirmation circuit is used for coupling with the first connection confirmation circuit in the charging and discharging gun when the adapter body is plugged with the charging and discharging gun, so that the charging and discharging circuit in the charging and discharging gun is in a charging path state.

[0016] An embodiment of the present invention further provides a charging and discharging system, including the charging and discharging gun described in any one of the above, and further including the above-mentioned discharge socket strip and / or the above-mentioned charging adapter.

[0017] The charging and discharging gun, discharge socket strip, charging adapter and charging and discharging system provided by the embodiments of the present invention can ensure that the charging and discharging gun can perform charging and discharging operations only after being correctly plugged with the discharge socket strip or the charging adapter by setting a first connection confirmation circuit for coupling when the charging and discharging gun is plugged with the discharge socket strip or the charging adapter, avoiding electric shock phenomena caused by poor contact or failure to connect the discharge socket strip, etc., and making the charging and discharging process safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic block diagram structure of a charging and discharging system in an embodiment of the present invention; Figure 2 It is another schematic block diagram structure of a charging and discharging system in an embodiment of the present invention; Figure 3 It is a schematic circuit structure diagram of a first connection confirmation circuit in an embodiment of the present invention; Figure 4 It is another schematic circuit structure diagram of a first connection confirmation circuit in an embodiment of the present invention; Figure 5 It is a schematic circuit diagram of a mode conversion control circuit in an embodiment of the present invention; Figure 6 It is a schematic circuit diagram of a first mode conversion protection circuit in an embodiment of the present invention; Figure 7 It is a schematic circuit diagram of a second mode conversion protection circuit in an embodiment of the present invention.

[0020] In the figure: 1. Charge and discharge gun; 11. Gun head end; 12. Pin end; 13. First connection confirmation circuit; 14. Charge and discharge circuit; 141. Main control chip; 142. Mode conversion control circuit; 1421. First voltage division circuit; 1422. Second voltage division circuit; 143. First mode conversion protection circuit; 144. Second mode conversion protection circuit; 2. Discharge socket; 21. Second connection confirmation circuit; 3. Charging adapter; 31. Third connection confirmation circuit. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] It should be understood that the present invention can be implemented in different forms and should not be construed as limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. In the drawings, for clarity, the dimensions and relative dimensions of layers and regions may be exaggerated. The same reference numerals denote the same elements throughout the drawings.

[0023] It should be understood that when an element or layer is referred to as "on", "adjacent to", "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected or coupled to the other element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as "directly on", "directly adjacent to", "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Thus, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below may be denoted as the second element, component, region, layer or part.

[0024] Spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. are used herein for convenience in describing the relationship of one element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relationship terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, then an element or feature described as "under" or "beneath" or "below" other elements or features will be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "beneath" can include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are to be interpreted accordingly.

[0025] The purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present invention. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, specify the presence of the stated features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups. As used herein, the term "and / or" includes any and all combinations of the associated listed items.

[0026] To fully understand the present invention, detailed structures and steps will be set forth in the following description in order to explain the technical solutions proposed by the present invention. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may have other embodiments.

[0027] An embodiment of the present invention provides a charging and discharging gun 1, asFigure 1 and Figure 2 As shown in Figure 2 , it includes a gun head end 11 and a pin end 12. The pin end 12 is used to plug into a discharge socket strip 2 or a charging adapter 3. The pin end 12 is provided with a first connection confirmation circuit 13, and a charge-discharge circuit 14 connected to the first connection confirmation circuit 13 is further provided in the charge-discharge gun 1. The first connection confirmation circuit 13 is used to couple with a second connection confirmation circuit 21 in the discharge socket strip 2 when the pin end 12 is plugged into the discharge socket strip 2, so that the charge-discharge circuit 14 is in a discharge path state; or, when the pin end 12 is plugged into the charging adapter 3, it is coupled with a third connection confirmation circuit 31 in the charging adapter 3, so that the charge-discharge circuit 14 is in a charging path state.

[0028] As an example, the charge-discharge gun 1 includes a gun head end 11 and a pin end 12, and the gun head end 11 and the pin end 12 are connected by a cable. The gun head end 11 is used to plug into an electric vehicle. The gun head end 11 can be provided with corresponding connection jacks for transmitting electric energy, protective earthing, transmitting charge / discharge connection confirmation signal CC and control pilot signal CP. The pin end 12 is used to plug into a discharge socket strip 2 or a charging adapter 3. When the gun head end 11 of the charge-discharge gun 1 is connected to the electric vehicle and the pin end 12 is connected to the discharge socket strip 2, the electric vehicle can discharge to the outside through the charge-discharge gun 1 and the discharge socket strip 2, and an electrical appliance is plugged into the discharge socket strip 2 to draw the vehicle's electric energy; when the gun head end 11 of the charge-discharge gun 1 is connected to the electric vehicle and the pin end 12 is connected to the charging adapter 3, the charging adapter 3 can be plugged into a mains power socket to charge the electric vehicle in a 10A household power environment.

[0029] The pin end 12 is provided with a first connection confirmation circuit 13, and the charging and discharging gun 1 is also provided with a charging and discharging circuit 14 connected to the first connection confirmation circuit 13. When the pin end 12 is plugged into the discharge socket 2, the first connection confirmation circuit 13 in the charging and discharging gun 1 can be coupled with the second connection confirmation circuit 21 in the discharge socket 2, so that the charging and discharging circuit 14 is in the discharge path state. At this time, the discharge socket 2 and the charging and discharging circuit 14 can handshake with the electric vehicle normally to complete the discharge operation. When the pin end 12 is plugged into the charging adapter 3, the first connection confirmation circuit 13 in the charging and discharging gun 1 can be coupled with the third connection confirmation circuit 31 in the charging adapter 3, so that the charging and discharging circuit 14 is in the charging path state. At this time, the charging adapter 3 and the charging and discharging circuit 14 can handshake with the electric vehicle normally to complete the charging operation. When the first connection confirmation circuit 13 is not coupled with the second connection confirmation circuit 21 or the third connection confirmation circuit 31, the charging and discharging circuit 14 cannot be in the discharge path state or the charging path state and cannot discharge externally or charge the electric vehicle. Therefore, the risk of electric shock caused by directly discharging when the charging and discharging gun 1 is not connected to the discharge socket 2 can be avoided, and the phenomena such as overload of the household power distribution or burning out of the socket caused by directly connecting to the mains when the charging and discharging gun 1 is not connected to the charging adapter 3 can also be avoided, making the charging and discharging safer.

[0030] In this embodiment, by providing the first connection confirmation circuit 13 for coupling when the charging and discharging gun 1 is plugged into the discharge socket 2 or the charging adapter 3, it can be ensured that the charging and discharging gun 1 can perform the charging and discharging operation only after being correctly plugged into the discharge socket 2 or the charging adapter 3, avoiding electric shock phenomena caused by poor contact or not connecting to the discharge socket 2, and making the charging and discharging process safer and more reliable.

[0031] In an embodiment, the charging and discharging circuit 14 being in the discharge path state includes: the ground wire PE in the charging and discharging circuit 14 being in the path state; the charging and discharging circuit 14 being in the charging path state includes: the ground wire PE in the charging and discharging circuit 14 being in the path state.

[0032] As an example, the charge and discharge circuit 14 being in the discharge path state includes: the ground wire PE in the charge and discharge circuit 14 being in a conducting state; the charge and discharge circuit 14 being in the charge path state, including: the ground wire PE in the charge and discharge circuit 14 being in a conducting state. For example, the first connection confirmation circuit 13 can be provided on the ground wire PE in the charge and discharge gun 1. When the first connection confirmation circuit 13 is coupled to the second connection confirmation circuit 21 in the discharge socket 2, or when the first connection confirmation circuit 13 is coupled to the third connection confirmation circuit 31 in the charging adapter 3, the ground wire PE in the charge and discharge gun 1 is in a conducting state and can be properly grounded. When the ground wire PE in the charge and discharge gun 1 is not in a conducting state, the charge and discharge circuit 14 cannot perform the charge / discharge operation normally. When the charge and discharge circuit 14 is in a conducting state, the charge and discharge circuit 14 can complete the charge / discharge operation after further confirming that the charge / discharge conditions are met.

[0033] In one embodiment, as Figure 3 shown, the first connection confirmation circuit 13 includes a normally closed magnetic switch K1; the normally closed magnetic switch K1 is provided on the ground wire PE in the charge and discharge circuit 14 and is used to attract and combine with the first magnet in the second connection confirmation circuit 21 in the discharge socket 2 when the pin end 12 is plugged into the discharge socket 2, so that the ground wire PE in the charge and discharge circuit 14 is in a conducting state, or, when the pin end 12 is plugged into the charging adapter 3, to attract and combine with the second magnet in the third connection confirmation circuit 31 in the charging adapter 3, so that the ground wire PE in the charge and discharge circuit 14 is in a conducting state.

[0034] As an example, the first connection confirmation circuit 13 includes a normally closed magnetic switch K1. The normally closed magnetic switch K1 is provided on the ground wire PE in the charge and discharge circuit 14. Under normal circumstances, the normally closed magnetic switch K1 is in an open state, so that the ground wire PE is also in an open state, and the charge and discharge circuit 14 cannot perform the charge / discharge operation. When the pin end 12 is plugged into the discharge socket 2, the normally closed magnetic switch K1 can be attracted and combined under the magnetic force of the first magnet in the second connection confirmation circuit 21, so that the ground wire PE in the charge and discharge circuit 14 is in a conducting state, and the charge and discharge circuit 14 can perform the discharge operation. When the pin end 12 is plugged into the charging adapter 3, the normally closed magnetic switch K1 can be attracted and combined under the magnetic force of the second magnet in the third connection confirmation circuit 31, so that the ground wire PE in the charge and discharge circuit 14 is in a conducting state, and the charge and discharge circuit 14 can perform the charging operation. When the pin end 12 leaves the discharge socket 2 or the charging adapter 3, the magnetic force acting on the normally closed magnetic switch K1 disappears, and the normally closed magnetic switch K1 will return to the open state again, making the ground wire PE return to the open state.

[0035] In one embodiment, as Figure 4As shown in the figure, the first connection confirmation circuit 13 includes a pin socket. The first end of the pin socket is connected to the ground wire PE in the charge and discharge circuit 14. The second end of the pin socket is used to be plugged into the first pin in the second connection confirmation circuit 21 in the discharge socket 2 when the pin end 12 is plugged into the discharge socket 2, so that the ground wire PE in the charge and discharge circuit 14 is in a conductive state; or, when the pin end 12 is plugged into the charging adapter 3, it is plugged into the second pin in the third connection confirmation circuit 31 in the charging adapter 3, so that the ground wire PE in the charge and discharge circuit 14 is in a conductive state.

[0036] As an example, the first connection confirmation circuit 13 includes a pin socket. The first end of the pin socket is connected to the ground wire PE in the charge and discharge circuit 14. In the normal state, the second end of the pin socket is in a floating and ungrounded state, so that the ground wire PE is also in a floating and ungrounded state, and the charge and discharge circuit 14 cannot perform charge / discharge operations. The discharge socket 2 is provided with a first pin. The first end of the first pin is grounded, and the second end is in a floating state. When the charge and discharge gun 1 is plugged into the discharge socket 2, the first pin is plugged into the pin socket, and the second end of the pin socket contacts the second end of the first pin. The floating states of the pin socket and the first pin are released, and the ground wire PE in the charge and discharge circuit 14 is in a normally grounded conductive state, and the charge and discharge circuit 14 can perform discharge operations. The charging adapter 3 is provided with a second pin. The first end of the second pin is grounded, and the second end is in a floating state. When the pin end 12 is plugged into the charging adapter 3, the second pin is plugged into the pin socket, and the second end of the pin socket contacts the second end of the second pin. The floating states of the pin socket and the second pin are released, and the ground wire PE in the charge and discharge circuit 14 is in a normally grounded conductive state, and the charge and discharge circuit 14 can perform charging operations. When the pin end 12 leaves the discharge socket 2 or the charging adapter 3, the pin socket will return to the floating and ungrounded state, making the ground wire PE return to the floating and ungrounded state.

[0037] In one embodiment, as Figure 2 shown, the charge and discharge circuit 14 includes a main control chip 141 and a mode conversion control circuit 142; the main control chip 141 is connected to the mode conversion control circuit 142 for outputting a discharge mode conversion signal or a charging mode conversion signal to the mode conversion control circuit 142; the input end of the mode conversion control circuit 142 is used to connect to the ground wire PE, and the output end of the mode conversion control circuit 142 is used to connect to the electric vehicle, and is used to output a discharge signal to the electric vehicle based on the discharge mode conversion signal or a charging signal to the electric vehicle based on the charging mode conversion signal when the ground wire PE is in a conductive state.

[0038] As an example, the charge and discharge circuit 14 includes a main control chip 141 and a mode conversion control circuit 142. The main control chip 141 is connected to the mode conversion control circuit 142. When the main control chip 141 detects a discharge demand, it can determine the current usage mode of the charge and discharge gun as the discharge mode, and based on the discharge mode, output a discharge mode conversion signal to the mode conversion control circuit 142; when the main control chip 141 detects a charging demand, it can determine the current usage mode as the charging mode, and based on the charging mode, output a charging mode conversion signal to the mode conversion control circuit 142. The input end of the mode conversion control circuit 142 is used to connect to the ground wire PE, and the output end of the mode conversion control circuit 142 is used to connect to the electric vehicle. When the ground wire PE is in a conducting state, the mode conversion control circuit 142 can, based on the discharge mode conversion signal, output a discharge signal to the electric vehicle, so that the electric vehicle can, based on the discharge signal, control the bi-directional on-board charger in the electric vehicle to output electric energy to the outside and realize external discharge, or, based on the charging mode conversion signal, output a charging signal to the electric vehicle, so that the electric vehicle can, based on the charging signal, control the bi-directional on-board charger in the electric vehicle to receive the electric energy transmitted from the outside and charge the electric vehicle.

[0039] In one embodiment, as Figure 5 shown, the mode conversion control circuit 142 includes a first relay K2, a first voltage dividing circuit 1421, and a second voltage dividing circuit 1422; the control end of the first relay K2 is connected to the main control chip 141 and is used to receive the discharge mode conversion signal or the charging mode conversion signal; the first relay K2 includes two moving contacts P0, two first stationary contacts P1, and two second stationary contacts P2; the two moving contacts P0 are respectively used to connect to the ground wire PE and the electric vehicle, the two first stationary contacts P1 are connected to the first voltage dividing circuit 1421, and the two second stationary contacts P2 are connected to the second voltage dividing circuit 1422; the first relay K2 is used to, based on the discharge mode conversion signal, control the two moving contacts P0 to be connected to the two first stationary contacts P1, so that the first voltage dividing circuit 1421 is connected between the ground wire PE and the electric vehicle, and the mode conversion control circuit 142 outputs a discharge signal to the electric vehicle, or, based on the charging mode conversion signal, control the two moving contacts P0 to be connected to the two second stationary contacts P2, so that the second voltage dividing circuit 1422 is connected between the ground wire PE and the electric vehicle, and the mode conversion control circuit 142 outputs a charging signal to the electric vehicle.

[0040] As an example, the mode conversion control circuit 142 includes a first relay K2, a first voltage dividing circuit 1421, and a second voltage dividing circuit 1422; the control terminal of the first relay K2 is connected to the main control chip 141 for receiving a discharge mode conversion signal or a charging mode conversion signal; the first relay K2 includes two moving contacts P0, two first stationary contacts P1, and two second stationary contacts P2; the two moving contacts P0 are respectively used for connecting to the ground wire PE and the electric vehicle, the two first stationary contacts P1 are connected to the first voltage dividing circuit 1421, and the two second stationary contacts P2 are connected to the second voltage dividing circuit 1422.

[0041] The discharge mode conversion signal can be a high-level signal, the charging mode conversion signal can be a low-level signal, the first relay K2 can be a normally closed relay, and it can be attracted when controlled by a high-level signal and disconnected when controlled by a low-level signal. When the first relay K2 is in the off state, it can make the two moving contacts P0 respectively connected to the two second stationary contacts P2, so that the second voltage dividing circuit 1422 is connected into the mode conversion control circuit 142; when the first relay K2 is in the attracted state, it can make the two moving contacts P0 respectively connected to the two first stationary contacts P1, so that the first voltage dividing circuit 1421 is connected into the mode conversion control circuit 142. Since both ends of the mode conversion control circuit 142 are respectively connected to the electric vehicle and the ground wire PE, and the resistance values of the resistors included in the first voltage dividing circuit 1421 and the second voltage dividing circuit 1422 are different, when different voltage dividing circuits are connected into the mode conversion control circuit 142, the current value or voltage value of the signal that can be detected at the electric vehicle end is also different. Thus, when the first voltage dividing circuit 1421 is connected into the mode conversion control circuit 142, the signal detected by the electric vehicle is used as the discharge signal, and when the second voltage dividing circuit 1422 is connected into the mode conversion control circuit 142, the signal detected by the electric vehicle is used as the charging signal, so that the electric vehicle performs corresponding charging and discharging actions according to the discharge signal or the charging signal.

[0042] In an embodiment, as Figure 2As shown, the charge and discharge circuit 14 further includes a first mode conversion protection circuit 143 and a second mode conversion protection circuit 144; the main control chip 141 is connected to the first mode conversion protection circuit 143 and the second mode conversion protection circuit 144, and is configured to output an analog unplugging signal to the first mode conversion protection circuit 143 when switching from the discharge mode to the charging mode, or output a disconnect isolation signal to the second mode conversion protection circuit 144 when switching from the charging mode to the discharge mode; the input end of the first mode conversion protection circuit 143 is connected to the output end of the mode conversion control circuit 142, and the output end of the first mode conversion protection circuit 143 is used to connect to an electric vehicle, and is configured to, based on the analog unplugging signal, control to disconnect the connection between the first mode conversion protection circuit 143 and the electric vehicle, and then reconnect the first mode conversion protection circuit 143 and the electric vehicle after a first preset time; the input end of the second mode conversion protection circuit 144 is used to connect to the charging adapter 3, and the output end of the second mode conversion protection circuit 144 is used to connect to an electric vehicle, and is configured to, based on the disconnect isolation signal, disconnect the control pilot signal connection between the charging adapter 3 and the electric vehicle.

[0043] As an example, the charge and discharge circuit 14 further includes a first mode conversion protection circuit 143 and a second mode conversion protection circuit 144. The main control chip 141 is connected to the first mode conversion protection circuit 143 and the second mode conversion protection circuit 144. The input end of the first mode conversion protection circuit 143 is connected to the output end of the mode conversion control circuit 142, and the output end of the first mode conversion protection circuit 143 is used to connect to an electric vehicle. The input end of the second mode conversion protection circuit 144 is used to connect to the charging adapter 3, and the output end of the second mode conversion protection circuit 144 is used to connect to an electric vehicle.

[0044] When switching from the discharge mode to the charging mode, the main control chip 141 can output an analog unplugging signal to the first mode conversion protection circuit 143. The analog unplugging signal can be a control signal output by the main control chip 141 with a duration of the first preset time. When the first mode conversion protection circuit 143 receives the analog unplugging signal, it can control to disconnect the connection between the first mode conversion protection circuit 143 and the electric vehicle, and when it does not receive the analog unplugging signal, it controls to reconnect the first mode conversion protection circuit 143 and the electric vehicle. Therefore, when receiving the analog unplugging signal, it can complete the reconnection after disconnecting the charge / discharge connection confirmation signal CC for the first preset time to complete the analog unplugging action, so as to prevent the phenomenon of charging and discharging voltage conflict when the electric vehicle switches from the discharge mode to the charging mode, and improve the safety of the charge and discharge conversion process.

[0045] When the charging mode is changed to the discharging mode, the main control chip 141 can output a disconnection isolation signal to the second mode conversion protection circuit 144. The second mode conversion protection circuit 144 can disconnect the control pilot signal CP between the charging adapter 3 and the electric vehicle based on the disconnection isolation signal, so that the electric vehicle can stop the discharge action of the bidirectional on-board charger in advance before entering the discharging mode, so as to prevent the bidirectional on-board charger from discharging the voltage for too long, causing the charging voltage to enter the bidirectional on-board charger, causing the circuit inside the bidirectional on-board charger to burn out, and other undesirable phenomena, thereby improving the safety of the charging and discharging conversion process.

[0046] In one embodiment, if Figure 6 As shown, the first mode conversion protection circuit 143 includes a second relay K3; the static contact of the second relay K3 is connected to the output end of the mode conversion control circuit 142, the moving contact of the second relay K3 is used to connect the electric vehicle, the second relay K3 is a normally open relay, and the control end of the second relay K3 is connected to the main control chip 141, which is used to disconnect when receiving a simulated gun drawing signal.

[0047] As an example, the first mode conversion protection circuit 143 includes a second relay K3. The static contact of the second relay K3 is connected to the output end of the mode conversion control circuit 142, the moving contact of the second relay K3 is used to connect the electric vehicle, the second relay K3 is a normally open relay, and the control end of the second relay K3 is connected to the main control chip 141. The simulated gun drawing signal can be a signal output by the main control chip 141 with a duration of a first preset time. The normally open relay is disconnected when receiving the low-level signal to disconnect the first mode conversion protection circuit 143 and the electric vehicle, and is re-engaged when the low-level signal is not received to reconnect the first mode conversion protection circuit 143 and the electric vehicle. Therefore, when the simulated gun drawing signal is received, the charge / discharge connection confirmation signal CC can be disconnected and reconnected after the first preset time, completing the simulated gun drawing action, so as to prevent the electric vehicle from generating a charge and discharge voltage conflict when the discharge mode is changed to the charging mode, thereby improving the safety of the discharge and charge conversion process.

[0048] In one embodiment, if Figure 7 As shown, the second mode conversion protection circuit 144 includes an optocoupler module U1; the light-emitting part of the optocoupler module U1 is connected to the main control chip 141, the first end of the light-receiving part of the optocoupler module U1 is used to connect to the charging adapter 3, and the second end of the light-receiving part of the optocoupler module U1 is used to connect to the electric vehicle, and is used to shut down when receiving a disconnect isolation signal, thereby disconnecting the control guidance signal connection between the charging adapter 3 and the electric vehicle.

[0049] As an example, the second mode conversion protection circuit 144 includes an optocoupler module U1. The light-emitting part of the optocoupler module U1 is connected to the main control chip 141, the first end of the light-receiving part of the optocoupler module U1 is used to connect to the charging adapter 3, and the second end of the light-receiving part of the optocoupler module U1 is used to connect to the electric vehicle. When the charging and discharging gun is in the charging mode, the main control chip 141 can output a high-level signal to the optocoupler module U1 to make the light-emitting part of the optocoupler module U1 work, the light-receiving part of the optocoupler module U1 is turned on, and the connection between the electric vehicle and the charging adapter 3 is turned on. The electric vehicle can transmit a handshake signal with the charging adapter 3 to communicate and determine the charging information. When switching from charging mode to discharging mode, the main control chip 141 can output a low-level signal to the optocoupler module U1, that is, disconnect the isolation signal, so that the light-emitting part of the optocoupler module U1 does not work, the light-receiving part of the optocoupler module U1 is cut off, and the control guide signal CP between the charging adapter 3 and the electric vehicle is disconnected, so that the electric vehicle can stop the discharge action of the bidirectional on-board charger in advance before entering the discharge mode, to prevent the bidirectional on-board charger from discharging voltage for too long, causing the charging voltage to enter the bidirectional on-board charger, causing the circuit inside the bidirectional on-board charger to burn out, and other adverse phenomena, thereby improving the safety of the charging and discharging conversion process.

[0050] The embodiment of the present invention further provides a discharge socket 2, including a socket body, on which a charge-discharge gun socket is provided; the charge-discharge gun socket is used to be plugged into the pin end 12 of the charge-discharge gun 1; a second connection confirmation circuit 21 is provided in the socket body, and the second connection confirmation circuit 21 is used to couple with the first connection confirmation circuit 13 in the charge-discharge gun 1 when the socket body is plugged into the charge-discharge gun 1, so that the charge-discharge circuit 14 in the charge-discharge gun 1 is in a discharge path state.

[0051] As an example, the discharge socket 2 includes a socket body, which is provided with a charging and discharging gun socket and a discharging socket; the charging and discharging gun socket is used to be plugged into the pin end 12 of the charging and discharging gun 1, and the discharging socket is used to connect the electrical appliance. During operation, the discharge socket 2 is used to supply the electric energy of the electric vehicle to the electrical appliance through the charging and discharging gun 1 to achieve external discharge. A second connection confirmation circuit 21 is provided in the socket body. When the socket body is plugged into the charging and discharging gun 1, the second connection confirmation circuit 21 can be coupled with the first connection confirmation circuit 13 in the charging and discharging gun 1, so that the charging and discharging circuit 14 in the charging and discharging gun 1 is in a discharge path state. The charging and discharging gun 1 can normally discharge to the outside when the charging and discharging circuit 14 is in the discharge path state. If the charging and discharging circuit 14 is not in the discharge path state, the charging and discharging gun 1 cannot discharge to the outside, thereby avoiding the risk of electric shock caused by direct discharge of the charging and discharging gun 1 without being connected to the discharge socket 2.

[0052] An embodiment of the present invention further provides a charging adapter 3, which includes an adapter body provided with an adapter jack; the adapter jack is used for plugging into the pin end 12 of the charging and discharging gun 1; a third connection confirmation circuit 31 is arranged in the adapter body, and the third connection confirmation circuit 31 is used for coupling with the first connection confirmation circuit 13 in the charging and discharging gun 1 when the adapter body is plugged into the charging and discharging gun 1, so that the charging and discharging circuit 14 in the charging and discharging gun 1 is in a charging path state.

[0053] As an example, the charging adapter 3 includes an adapter body provided with an adapter jack and an adapter pin. The adapter jack is used for plugging into the pin end 12 of the charging and discharging gun 1, and the adapter pin is used for accessing the mains power socket to charge the electric vehicle in a 10A household power environment. A third connection confirmation circuit 31 is arranged in the adapter body. When the adapter body is plugged into the charging and discharging gun 1, the third connection confirmation circuit 31 is coupled with the first connection confirmation circuit 13 in the charging and discharging gun 1, so that the charging and discharging circuit 14 in the charging and discharging gun 1 is in a charging path state. The charging and discharging gun 1 can normally charge the electric vehicle when the charging and discharging circuit 14 is in the charging path state. If the charging and discharging circuit 14 is not in the charging path state, the charging and discharging gun 1 cannot charge the electric vehicle. Therefore, it can avoid phenomena such as household power distribution overload or socket burnout caused by directly connecting the charging and discharging gun 1 to the mains without connecting it to the charging adapter 3, and make the charging and discharging safer.

[0054] An embodiment of the present invention further provides a charging and discharging system, which includes the charging and discharging gun 1 in the above embodiment, the discharging socket 2 in the above embodiment, and / or the charging adapter 3 in the above embodiment.

[0055] As an example, the charging and discharging system includes the charging and discharging gun 1 in the above example, the discharging socket 2 in the above example, and / or the charging adapter 3 in the above example. In this example, by setting the first connection confirmation circuit 13 in the charging and discharging gun 1 for coupling when plugging into the discharging socket 2 or the charging adapter 3, it can be ensured that the charging and discharging gun 1 can perform the charging and discharging operation only after being correctly plugged into the discharging socket 2 or the charging adapter 3, avoiding electric shock phenomena caused by poor contact or not connecting to the discharging socket 2, and making the charging and discharging process safer and more reliable.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A charging and discharging gun, characterized in that: It includes a gun head end and a pin end, and the pin end is used to plug into a discharge socket or a charging adapter; The pin end is provided with a first connection confirmation circuit, and the charge-discharge gun is also provided with a charge-discharge circuit connected to the first connection confirmation circuit; The first connection confirmation circuit is used to couple with the second connection confirmation circuit in the discharge socket when the pin end is plugged into the discharge socket, so that the charge and discharge circuit is in a discharge path state; or, when the pin end is plugged into the charging adapter, couple with the third connection confirmation circuit in the charging adapter, so that the charge and discharge circuit is in a charging path state.

2. The charge-discharge gun according to claim 1, characterized in that: The charging and discharging circuit is in a discharge path state, comprising: a ground line in the charging and discharging circuit is in a path state; The charging and discharging circuit is in a charging path state, which includes: a ground line in the charging and discharging circuit is in a path state.

3. The charge-discharge gun according to claim 2, characterized in that: The first connection confirmation circuit includes a normally closed magnetic switch; The normally closed magnetic switch is arranged on the ground wire in the charging and discharging circuit, and is used to attract the first magnet in the second connection confirmation circuit in the discharge socket when the pin end is plugged into the discharge socket, so that the ground wire in the charging and discharging circuit is in a connection state, or, when the pin end is plugged into the charging adapter, attract the second magnet in the third connection confirmation circuit in the charging adapter, so that the ground wire in the charging and discharging circuit is in a connection state.

4. The charge-discharge gun according to claim 2, characterized in that: The first connection confirmation circuit includes a pin socket, a first end of the pin socket is connected to the ground wire in the charge and discharge circuit, and a second end of the pin socket is used to connect with the first pin in the second connection confirmation circuit in the discharge socket when the pin end is connected to the discharge socket, so that the ground wire in the charge and discharge circuit is in a connection state; or, when the pin end is connected to the charging adapter, it is connected with the second pin in the third connection confirmation circuit in the charging adapter, so that the ground wire in the charge and discharge circuit is in a connection state.

5. The charge-discharge gun according to claim 2, characterized in that: The charging and discharging circuit includes a main control chip and a mode conversion control circuit; The main control chip is connected to the mode conversion control circuit, and is used to output a discharge mode conversion signal to the mode conversion control circuit based on the discharge mode, or output a charge mode conversion signal to the mode conversion control circuit based on the charge mode; The input end of the mode conversion control circuit is used to connect to the ground line, and the output end of the mode conversion control circuit is used to connect to the electric vehicle, and is used to output a discharge signal to the electric vehicle based on the discharge mode conversion signal when the ground line is in a conductive state, or to output a charging signal to the electric vehicle based on the charging mode conversion signal.

6. The charge-discharge gun according to claim 5, characterized in that: The mode conversion control circuit includes a first relay, a first voltage dividing circuit and a second voltage dividing circuit; The control end of the first relay is connected to the main control chip and is used to receive a discharge mode conversion signal or a charge mode conversion signal; The first relay comprises two moving contacts, two first stationary contacts and two second stationary contacts; The two moving contacts are used to connect the ground wire and the electric vehicle respectively, the two first static contacts are connected to the first voltage divider circuit, and the two second static contacts are connected to the second voltage divider circuit; The first relay is used to control the two moving contacts to be connected to the two first static contacts based on the discharge mode conversion signal, so that the first voltage-dividing circuit is connected between the ground wire and the electric vehicle, and the mode conversion control circuit outputs a discharge signal to the electric vehicle, or, based on the charging mode conversion signal, control the two moving contacts to be connected to the two second static contacts, so that the second voltage-dividing circuit is connected between the ground wire and the electric vehicle, and the mode conversion control circuit outputs a charging signal to the electric vehicle.

7. The charge-discharge gun according to claim 5, characterized in that: The charge and discharge circuit also includes a first mode conversion protection circuit and a second mode conversion protection circuit; The main control chip is connected to the first mode conversion protection circuit and the second mode conversion protection circuit, and is used to output a simulated gun-drawing signal to the first mode conversion protection circuit when the discharge mode is converted to the charging mode, or to output a disconnection isolation signal to the second mode conversion protection circuit when the charging mode is converted to the discharge mode; The input end of the first mode conversion protection circuit is connected to the output end of the mode conversion control circuit, and the output end of the first mode conversion protection circuit is used to connect the electric vehicle, and is used to control the disconnection of the first mode conversion protection circuit and the electric vehicle after a first preset time based on the simulated gun drawing signal, and then reconnect the first mode conversion protection circuit and the electric vehicle; The input end of the second mode conversion protection circuit is used to connect to the charging adapter, and the output end of the second mode conversion protection circuit is used to connect to the electric vehicle, and is used to disconnect the control guidance signal connection between the charging adapter and the electric vehicle based on the disconnection isolation signal.

8. The charge-discharge gun according to claim 7, characterized in that: The first mode conversion protection circuit includes a second relay; The static contact of the second relay is connected to the output end of the mode conversion control circuit, the moving contact of the second relay is used to connect to the electric vehicle, the second relay is a normally open relay, and the control end of the second relay is connected to the main control chip for disconnecting when receiving the simulated gun drawing signal.

9. The charge-discharge gun according to claim 7, characterized in that: The second mode conversion protection circuit includes an optical coupler module; The light-emitting part of the optocoupler module is connected to the main control chip, the first end of the light-receiving part of the optocoupler module is used to connect to the charging adapter, and the second end of the light-receiving part of the optocoupler module is used to connect to the electric vehicle, and is used to shut down when receiving the disconnection isolation signal, thereby disconnecting the control guidance signal connection between the charging adapter and the electric vehicle.

10. A discharge socket, characterized in that: It comprises a socket body, on which a charging and discharging gun socket is provided; the charging and discharging gun socket is used to be plugged into the pin end of the charging and discharging gun; A second connection confirmation circuit is provided in the socket body, and the second connection confirmation circuit is used to couple with the first connection confirmation circuit in the charge-discharge gun when the socket body is plugged into the charge-discharge gun, so that the charge-discharge circuit in the charge-discharge gun is in a discharge path state.

11. A charging adapter, characterized in that: It includes an adapter body, on which an adapter socket is provided; the adapter socket is used to be plugged into the pin end of the charging and discharging gun; A third connection confirmation circuit is provided in the adapter body, and the third connection confirmation circuit is used to couple with the first connection confirmation circuit in the charge-discharge gun when the adapter body is plugged into the charge-discharge gun, so that the charge-discharge circuit in the charge-discharge gun is in a charging path state.

12. A charging and discharging system, characterized in that: It comprises the charging and discharging gun according to any one of claims 1 to 9, and also comprises the discharging socket strip according to claim 10 and / or the charging adapter according to claim 11.

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