Charging and discharging control circuit and system and vehicle

Abstract

The utility model relates to a charging and discharging control circuit and system and a vehicle. The circuit comprises a switch module, a battery power supply module, a vehicle-mounted OBC module, an external power grid interface and a power utilization module. The battery power supply module, the vehicle-mounted OBC module, the switch module and the power utilization module are electrically connected to form a second loop; the switch module, the battery power supply module, the vehicle-mounted OBC module, the external power grid interface and the power utilization module are electrically connected to form a third loop; wherein the power utilization module uses power, the second loop is conducted, and the battery power supply module takes power through the vehicle-mounted OBC module and the switch module to supply power to the power utilization module; when the power utilization module supplies power, the external power grid is connected to the external power grid interface, the second loop is disconnected and the third loop is connected at the same time, the external power grid charges the battery power supply module through the switch module and the vehicle-mounted OBC module, and the external power grid supplies power to the power utilization module through the switch module. According to the invention, the circuit for supplying power to the power utilization module is switched while the power supply to the power utilization module is not interrupted, so that the user experience is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of charge and discharge control technology, and in particular to a charge and discharge control circuit, system, and vehicle. Background Art

[0002] As new energy vehicles continue to expand in functionality, more and more require V2L (Vehicle to Load) capabilities, which allow the vehicle to provide external power, such as powering common household appliances. V2L functionality is typically implemented through an onboard charger (OBC). The OBC can supply power to power-consuming devices when the vehicle's power battery isn't needed.

[0003] In the prior art, when a power battery is directly supplying power to an electrical device, if a charging gun needs to be inserted, the power to the electrical device will be cut off and then restarted when the charging gun is used to charge the power battery and supply power to the electrical device, which seriously affects the user experience. Utility Model Content

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a charge and discharge control circuit, system and vehicle.

[0005] The present disclosure provides a charge and discharge control circuit, including: a switch module, a battery power module, an on-board OBC module, an off-vehicle power grid interface, and a power consumption module; the off-vehicle power grid interface, the switch module, the on-vehicle OBC module, and the battery power module are electrically connected to form a first circuit; the battery power module, the on-vehicle OBC module, the switch module, and the power consumption module are electrically connected to form a second circuit; the switch module, the battery power module, the on-vehicle OBC module, the off-vehicle power grid interface, and the power consumption module are electrically connected to form a third circuit.

[0006] Among them, the external power grid is connected to the external power grid interface, the first circuit is turned on, and the external power grid charges the battery power module through the switch module and the on-board OBC module; the power consumption module consumes power, the second circuit is turned on, and power is taken from the battery power module through the on-board OBC module and the switch module to supply power to the power consumption module; when the power consumption module consumes power, the external power grid is connected to the external power grid interface, the second circuit is disconnected and the third circuit is turned on, the external power grid charges the battery power module through the switch module and the on-board OBC module, and the external power grid supplies power to the power consumption module through the switch module.

[0007] Optionally, the switch module includes a first switch unit, a second switch unit and a third switch unit; the first end of the vehicle-mounted OBC module is electrically connected to the first end of the first switch unit and the first end of the second switch unit, the off-vehicle power grid interface is electrically connected to the second end of the first switch unit and the first end of the third switch unit, the power module is electrically connected to the second end of the second switch unit and the second end of the third switch unit, and the control end of the first switch unit, the control end of the second switch unit and the control end of the third switch unit are electrically connected to each output end of the vehicle-mounted OBC module one by one.

[0008] Among them, the external power grid is connected to the external power grid interface, the first switch unit is turned on, and the first circuit is turned on; the power-consuming module consumes power, the second switch unit is turned on, and the second circuit is turned on; when the power-consuming module consumes power, the external power grid is connected to the external power grid interface, the first switch unit and the third switch unit are turned on at the same time, the second switch unit is turned off, the third circuit is turned on, and the second circuit is disconnected.

[0009] Optionally, the first switch unit is a first relay, the second switch unit is a second relay, and the third switch unit is a third relay; the first end of the vehicle-mounted OBC module is electrically connected to the first end of the first relay and the first end of the second relay, the off-vehicle power grid interface is electrically connected to the second end of the first relay and the first end of the third relay, the power module is electrically connected to the second end of the second relay and the second end of the third relay, and the control end of the first relay, the control end of the second relay, and the control end of the third relay are electrically connected to each output end of the vehicle-mounted OBC module one by one.

[0010] Optionally, the first switch unit is a first MOS tube, the second switch unit is a second MOS tube, and the third switch unit is a third MOS tube; the first end of the vehicle-mounted OBC module is electrically connected to the first pole of the first MOS tube and the first pole of the second MOS tube, the off-vehicle power grid interface is electrically connected to the second pole of the first MOS tube and the first pole of the third MOS tube, the power module is electrically connected to the second pole of the second MOS tube and the second pole of the third MOS tube, and the gate of the first MOS tube, the gate of the second MOS tube, and the gate of the third MOS tube are electrically connected one-to-one to each output end of the vehicle-mounted OBC module.

[0011] Optionally, the switch module includes a fourth switch unit and a fifth switch unit; the first end of the vehicle-mounted OBC module is electrically connected to the first end of the fourth switch unit and the first end of the fifth switch unit, the off-vehicle power grid interface is electrically connected to the second end of the fourth switch unit and the second end of the fifth switch unit, the power module is electrically connected to the third end of the fifth switch unit, and the control end of the fourth switch unit and the control end of the fifth switch unit are electrically connected to the respective output ends of the vehicle-mounted OBC module.

[0012] Among them, the external power grid is connected to the external power grid interface, the fourth switch unit is turned on, and the first circuit is turned on; the power consumption module consumes power, the fifth switch unit switches to the first working state, and the second circuit is turned on; when the power consumption module consumes power, the external power grid is connected to the external power grid interface, the fourth switch unit is turned on, the fifth switch unit switches to the second working state, the third circuit is turned on and the second circuit is disconnected; the first working state is the working state in which the first end of the fifth switch unit is connected to the third end of the fifth switch unit, and the second working state is the working state in which the second end of the fifth switch unit is connected to the third end of the fifth switch unit.

[0013] Optionally, the fourth switch unit is a first NMOS tube, and the fifth switch unit includes a second NMOS tube and a PMOS tube; the first end of the vehicle-mounted OBC module is electrically connected to the first pole of the first NMOS tube and the first pole of the second NMOS tube, the off-vehicle power grid interface is electrically connected to the second pole of the first NMOS tube and the first pole of the PMOS tube, and the power module is electrically connected to the second pole of the second NMOS tube and the second pole of the PMOS tube; the first output end of the vehicle-mounted OBC module is electrically connected to the gate of the first NMOS tube, and the gate of the second NMOS tube and the gate of the PMOS tube are both electrically connected to the second output end of the vehicle-mounted OBC module.

[0014] Optionally, the off-vehicle power grid interface includes a detection unit; the detection unit is electrically connected to the on-board OBC module; the detection unit is used to detect whether the off-vehicle power grid interface is connected to the off-vehicle power grid.

[0015] Optionally, the vehicle-mounted OBC module includes: a charging and discharging unit and a control unit; the control end of the charging and discharging unit is electrically connected to the first output end of the control unit, the second output end of the control unit is electrically connected to the control end of the switch module, and the input end of the control unit is electrically connected to the detection unit; the control unit is used to switch the charging and discharging state of the charging and discharging unit according to the detection conditions of the detection unit, and to control the working state of the switch module.

[0016] The present disclosure also provides a charge and discharge control system, comprising any of the above-mentioned charge and discharge control circuits.

[0017] The present disclosure also provides a vehicle, comprising the above charge and discharge control system.

[0018] The present disclosure provides a charge and discharge control circuit, system and vehicle. The charge and discharge control circuit includes a switch module, a battery power module, an on-board OBC module, an off-board power grid interface and a power consumption module. When the off-board power grid is connected to the off-board power grid interface, the present disclosure makes the first circuit conductive, and the off-board power grid charges the battery power module through the switch module and the on-board OBC module. When the power consumption module consumes power, the second circuit is conductive, and the battery power module supplies power to the power consumption module through the on-board OBC module and the switch module. While the battery power module supplies power to the power consumption module, the off-board power grid can be connected to the off-board power grid interface, and while the off-board power grid charges the battery power module, it also supplies power to the power consumption module. At this time, the third circuit of the charge and discharge control circuit is conductive, and the second circuit is disconnected at the same time. The off-board power grid charges the battery power module through the switch module and the on-board OBC module, and the off-board power grid supplies power to the power consumption module through the switch module. The present disclosure switches on the third circuit while cutting off the power supply from the battery power module to the power-consuming module. Therefore, the present disclosure switches the power supply path to the power-consuming module without interrupting the power supply to the power-consuming module, thereby avoiding the situation where the power-consuming module is powered off and restarted during use, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A schematic diagram of a charge and discharge control circuit according to an embodiment of the present disclosure

[0021] Figure 2 A schematic structural diagram of a preferred charge and discharge control circuit provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0022] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed in order to provide a comprehensive understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The embodiments will be described in detail below with reference to the accompanying drawings.

[0024] Figure 1 A schematic diagram of a charge and discharge control circuit according to an embodiment of the present disclosure is shown in FIG. Figure 1 As shown, the charge and discharge control circuit includes: a switch module 100 , a battery power module 200 , an on-board OBC module 300 , an off-vehicle power grid interface 400 and a power consumption module 500 .

[0025] The external power grid interface 400, the switch module 100, the on-board OBC module 300 and the battery power module 200 are electrically connected to form a first circuit; the battery power module 200, the on-board OBC module 300, the switch module 100 and the power consumption module 500 are electrically connected to form a second circuit; the switch module 100, the battery power module 200, the on-board OBC module 300, the external power grid interface 400 and the power consumption module 500 are electrically connected to form a third circuit.

[0026] Among them, the external power grid is connected to the external power grid interface 400, the first circuit is turned on, and the external power grid charges the battery power module 200 through the switch module 100 and the on-board OBC module 300; the power-consuming module 500 consumes electricity, the second circuit is turned on, and the battery power module 200 takes electricity through the on-board OBC module 300 and the switch module 100 to supply power to the power-consuming module 500; when the power-consuming module 500 consumes electricity, the external power grid is connected to the external power grid interface 400, the second circuit is disconnected and the third circuit is turned on, the external power grid charges the battery power module 200 through the switch module 100 and the on-board OBC module 300, and the external power grid supplies power to the power-consuming module 500 through the switch module 100.

[0027] Specifically, a first branch 110, a second branch 120 and a third branch 130 are provided in the switch module 100. The first end 101 of the switch module 100 is electrically connected to the second end 102 of the switch module 100 through the first branch 110, the first end 101 of the switch module 100 is electrically connected to the third end 103 of the switch module 100 through the second branch 120, and the second end 102 of the switch module 100 is electrically connected to the third end 103 of the switch module 100 through the third branch 130. The first end 101 of the switch module 100 is electrically connected to the first end 301 of the vehicle-mounted OBC module 300, the second end 102 of the switch module 100 is electrically connected to the external power grid interface 400, the third end 103 of the switch module 100 is electrically connected to the power consumption module 500, the control end 104 of the switch module 100 is electrically connected to the output end 302 of the vehicle-mounted OBC module 300, the external power grid interface 400 is electrically connected to the input end 303 of the vehicle-mounted OBC module 300, and the battery power module 200 is electrically connected to the vehicle-mounted OBC module 300.

[0028] The off-vehicle power grid interface 400 is electrically connected to the second end 102 of the switch module 100, the second end 102 of the switch module 100 is electrically connected to the first end 101 of the switch module 100 through the first branch 110, the first end 101 of the switch module 100 is electrically connected to the first end 301 of the on-board OBC module 300, and the on-board OBC module 300 is electrically connected to the battery power module 200, forming a first loop. When the first branch 110 is turned on, the first loop is turned on.

[0029] The battery power module 200 is electrically connected to the on-board OBC module 300, the first end 301 of the on-board OBC module 300 is electrically connected to the first end 101 of the switch module 100, the first end 101 of the switch module 100 is electrically connected to the third end 103 of the switch module 100 through the second branch 120, and the third end 103 of the switch module 100 is electrically connected to the power module 500 to form a second loop. When the second branch 120 is turned on, the second loop is turned on.

[0030] The off-vehicle power grid interface 400 is electrically connected to the second end 102 of the switch module 100, the second end 102 of the switch module 100 is electrically connected to the third end 103 of the switch module 100 through the third branch 130, the third end 103 of the switch module 100 is electrically connected to the power consumption module 500, the second end 102 of the switch module 100 is electrically connected to the first end 101 of the switch module 100 through the first branch 110, the first end 101 of the switch module 100 is electrically connected to the first end 301 of the on-board OBC module 300, and the on-board OBC module 300 is electrically connected to the battery power module 200, forming a third loop. When the first branch 110 and the third branch 130 are turned on, the third loop is turned on.

[0031] When the external grid is connected to the external grid interface 400, the first circuit is activated, and the external grid charges the battery power module 200 through the switch module 100 and the onboard OBC module 300. When the power consumption module 500 consumes power, the second circuit is activated, and the battery power module 200 supplies power to the power consumption module 500 through the onboard OBC module 300 and the switch module 100. While the battery power module 200 is supplying power to the power consumption module 500, the external grid can be connected to the external grid interface 400 to stop charging the power consumption module 500 from the battery power module 200, allowing the external grid to simultaneously charge the battery power module 200 and supply power to the power consumption module 500. At this point, the third circuit of the charge and discharge control circuit is activated, while the second circuit is disconnected. The external grid charges the battery power module 200 through the switch module 100 and the onboard OBC module 300, and the external grid supplies power to the power consumption module 500 through the switch module 100. The present disclosure switches on the third circuit while cutting off the power supply from the battery power module 200 to the power-consuming module 500. Therefore, the present disclosure switches the power supply path to the power-consuming module 500 without interrupting the power supply to the power-consuming module 500, thereby avoiding the situation where the power-consuming module 500 is powered off and restarted during use, thereby improving the user experience.

[0032] In some embodiments, the switch module includes a first switch unit, a second switch unit and a third switch unit; the first end of the on-board OBC module is electrically connected to the first end of the first switch unit and the first end of the second switch unit, the off-board power grid interface is electrically connected to the second end of the first switch unit and the first end of the third switch unit, the power consumption module is electrically connected to the second end of the second switch unit and the second end of the third switch unit, and the control end of the first switch unit, the control end of the second switch unit and the control end of the third switch unit are electrically connected one-to-one with each output end of the on-board OBC module; wherein, the off-board power grid is connected to the off-board power grid interface, the first switch unit is turned on, and the first circuit is turned on; the power consumption module uses power, the second switch unit is turned on, and the second circuit is turned on; when the power consumption module uses power, the off-board power grid is connected to the off-board power grid interface, the first switch unit and the third switch unit are turned on at the same time, the second switch unit is disconnected, the third circuit is turned on and the second circuit is disconnected.

[0033] Specifically, the external grid interface is electrically connected to the first end of the onboard OBC module via a first switch unit, and the onboard OBC module is electrically connected to the battery power module, forming a first circuit. When the external grid is connected to the external grid interface, the corresponding output end of the onboard OBC module outputs a level signal to the control end of the first switch unit, turning on the first switch unit. This completes the first circuit, and the external grid charges the battery power module through the first switch unit and the onboard OBC module.

[0034] The battery power module is electrically connected to the onboard OBC module. The first end of the onboard OBC module is electrically connected to the power-consuming module via the second switch unit, forming a second circuit. When the power-consuming module consumes power, the corresponding output end of the onboard OBC module outputs a level signal to the control end of the second switch unit, turning on the second switch unit. This activates the second circuit, and the battery power module supplies power to the power-consuming module via the onboard OBC module and the second switch unit.

[0035] The external power grid interface is electrically connected to the power consumption module via a third switch unit. The first end of the onboard OBC module is electrically connected to the external power grid interface via the first switch unit. The onboard OBC module is electrically connected to the battery power module, forming a third circuit. While the battery power module is supplying power to the power consumption module, the external power grid is connected to the external power grid interface, stopping the battery power module from charging the power consumption module. This allows the external power grid to simultaneously charge the battery power module and supply power to the power consumption module. After the external power grid is connected to the external power grid interface, the corresponding output end of the onboard OBC module outputs a level signal, disconnecting the second switch unit and the second circuit. Simultaneously, the first and third switch units are connected, connecting the third circuit. The external power grid charges the battery power module via the first switch unit and the onboard OBC module, and the external power grid supplies power to the power consumption module via the third switch unit. The present disclosure turns on the first switch unit and the third switch unit while cutting off the second switch unit, so that while cutting off the second circuit for supplying power from the battery power module to the power module, the third circuit for supplying power from the off-vehicle power grid interface to the power module is turned on. Therefore, the present disclosure achieves switching of the power supply path to the power module by switching the conduction states of the first switch unit, the second switch unit and the third switch unit without interrupting the power supply to the power module, thereby preventing the power module from being powered off and restarted during use, thereby improving the user experience.

[0036] In some embodiments, the first switch unit is a first relay, the second switch unit is a second relay, and the third switch unit is a third relay; the first end of the vehicle-mounted OBC module is electrically connected to the first end of the first relay and the first end of the second relay, the off-vehicle power grid interface is electrically connected to the second end of the first relay and the first end of the third relay, the power module is electrically connected to the second end of the second relay and the second end of the third relay, and the control end of the first relay, the control end of the second relay, and the control end of the third relay are electrically connected one-to-one with each output end of the vehicle-mounted OBC module.

[0037] Specifically, the external power grid interface is electrically connected to the first end of the onboard OBC module via a first relay, and the onboard OBC module is electrically connected to the battery power module, forming a first circuit. When the external power grid is connected to the external power grid interface, the corresponding output end of the onboard OBC module outputs a level signal to the control end of the first relay, turning on the first relay. This completes the first circuit, allowing the external power grid to charge the battery power module through the first relay and the onboard OBC module.

[0038] The battery power module is electrically connected to the onboard OBC module. The first terminal of the onboard OBC module is electrically connected to the power consumption module via a second relay, forming a second circuit. When the power consumption module consumes power, the corresponding output terminal of the onboard OBC module outputs a level signal to the control terminal of the second relay, turning on the second relay. This activates the second circuit, and the battery power module supplies power to the power consumption module via the onboard OBC module and the second relay.

[0039] The external power grid interface is electrically connected to the power consumption module via a third relay. The first end of the onboard OBC module is electrically connected to the external power grid interface via the first relay. The onboard OBC module is electrically connected to the battery power module, forming a third circuit. While the battery power module is supplying power to the power consumption module, the external power grid is connected to the external power grid interface, stopping the battery power module from charging the power consumption module. This allows the external power grid to simultaneously charge the battery power module and supply power to the power consumption module. After the external power grid is connected to the external power grid interface, the corresponding output end of the onboard OBC module outputs a level signal, disconnecting the second relay and the second circuit. Simultaneously, the first and third relays are connected, connecting the third circuit. The external power grid charges the battery power module through the first relay and the onboard OBC module, and the external power grid supplies power to the power consumption module through the third relay. The present disclosure simultaneously disconnects the second relay and connects the first and third relays, thereby disconnecting the second circuit from the battery power module and connecting the third circuit from the external power grid interface to the power consumption module. Therefore, the present invention can switch the power supply path of the power module by switching the conduction state of the first relay, the second relay and the third relay without interrupting the power supply of the power module, thereby avoiding the power outage and restart of the power module during use, thereby improving the user experience.

[0040] In some embodiments, the first switch unit is a first MOS tube, the second switch unit is a second MOS tube, and the third switch unit is a third MOS tube; the first end of the vehicle-mounted OBC module is electrically connected to the first pole of the first MOS tube and the first pole of the second MOS tube, the off-vehicle power grid interface is electrically connected to the second pole of the first MOS tube and the first pole of the third MOS tube, the power module is electrically connected to the second pole of the second MOS tube and the second pole of the third MOS tube, and the gate of the first MOS tube, the gate of the second MOS tube, and the gate of the third MOS tube are electrically connected one-to-one to each output end of the vehicle-mounted OBC module.

[0041] Specifically, the external power grid interface is electrically connected to the first end of the onboard OBC module via a first MOS transistor, and the onboard OBC module is electrically connected to the battery power module, forming a first circuit. When the external power grid is connected to the external power grid interface, the corresponding output end of the onboard OBC module outputs a level signal to the gate of the first MOS transistor, turning on the first MOS transistor. This completes the first circuit, and the external power grid charges the battery power module through the first MOS transistor and the onboard OBC module.

[0042] The battery power module is electrically connected to the onboard OBC module. The first end of the onboard OBC module is electrically connected to the power consumption module via a second MOS transistor, forming a second circuit. When the power consumption module consumes power, the corresponding output end of the onboard OBC module outputs a level signal to the gate of the second MOS transistor, turning the second MOS transistor on. This activates the second circuit, and the battery power module supplies power to the power consumption module through the onboard OBC module and the second MOS transistor.

[0043] The off-board power grid interface is electrically connected to the power consumption module via a third MOS transistor. The first end of the on-board OBC module is electrically connected to the off-board power grid interface via a first MOS transistor. The on-board OBC module is electrically connected to the battery power module, forming a third circuit. While the battery power module is supplying power to the power consumption module, the off-board power grid is connected to the off-board power grid interface, stopping the battery power module from charging the power consumption module, so that the off-board power grid simultaneously charges the battery power module and supplies power to the power consumption module. After the off-board power grid is connected to the off-board power grid interface, the corresponding output end of the on-board OBC module outputs level signals to the first MOS transistor, the second MOS transistor, and the third MOS transistor, respectively, disconnecting the second MOS transistor and disconnecting the second circuit. At the same time, the first MOS transistor and the third MOS transistor are connected, connecting the third circuit. The off-board power grid charges the battery power module via the first MOS transistor and the on-board OBC module, and the off-board power grid supplies power to the power consumption module via the third MOS transistor. The present disclosure switches on the first and third MOS tubes while cutting off the second MOS tube, so that while cutting off the second circuit from the battery power module to the power-consuming module, the third circuit from the off-vehicle power grid interface to the power-consuming module is switched on. Therefore, the present disclosure directly switches the power supply path to the power-consuming module without interrupting the power supply to the power-consuming module, avoiding the situation where the power-consuming module is powered off and restarted during use, thereby improving the user experience.

[0044] In some embodiments, the switch module includes a fourth switch unit and a fifth switch unit; the first end of the vehicle-mounted OBC module is electrically connected to the first end of the fourth switch unit and the first end of the fifth switch unit, the off-vehicle power grid interface is electrically connected to the second end of the fourth switch unit and the second end of the fifth switch unit, the power module is electrically connected to the third end of the fifth switch unit, and the control end of the fourth switch unit and the control end of the fifth switch unit are electrically connected to the respective output ends of the vehicle-mounted OBC module.

[0045] Among them, the external power grid is connected to the external power grid interface, the fourth switch unit is turned on, and the first circuit is turned on; the power consumption module consumes power, the fifth switch unit switches to the first working state, and the second circuit is turned on; when the power consumption module consumes power, the external power grid is connected to the external power grid interface, the fourth switch unit is turned on, the fifth switch unit switches to the second working state, the third circuit is turned on and the second circuit is disconnected; the first working state is the working state in which the first end of the fifth switch unit is connected to the third end of the fifth switch unit, and the second working state is the working state in which the second end of the fifth switch unit is connected to the third end of the fifth switch unit.

[0046] Exemplarily, the fifth switch unit can be a mechanical linkage switch, in which a first branch, a second branch, and a third branch are provided in the switch module. The on-board OBC module is electrically connected to the off-board power grid interface via the first branch, the on-board OBC module is also electrically connected to the power consumption module via the second branch, and the off-board power grid interface is electrically connected to the power consumption module via the third branch. The fourth switch unit is electrically connected to the first branch for turning on or off the first branch. The first end of the fifth switch unit and the third end of the fifth switch unit are electrically connected to the second branch, respectively, for turning on or off the second branch. The second end of the fifth switch unit and the third end of the fifth switch unit are electrically connected to the third branch, respectively, for turning on or off the third branch. Since the fifth switch unit is a mechanical linkage switch, when the fifth switch unit turns on the second branch, the third branch will be turned off, i.e., the first working state, or when the fifth switch unit turns off the second branch, the third branch will be turned on, i.e., the second working state.

[0047] The external power grid interface is electrically connected to the first terminal of the onboard OBC module via the fourth switch unit. The onboard OBC module is then electrically connected to the battery power module, forming a first circuit. When the external power grid is connected to the external power grid interface, the corresponding output terminal of the onboard OBC module outputs a level signal to the control terminal of the fourth switch unit, turning on the fourth switch unit. This activates the first circuit, allowing the external power grid to charge the battery power module through the fourth switch unit and the onboard OBC module.

[0048] The battery power module is electrically connected to the onboard OBC module. The first end of the onboard OBC module is electrically connected to the first end of the fifth switch unit. The third end of the fifth switch unit is electrically connected to the power-consuming module, forming a second circuit. When the power-consuming module is consuming power, the corresponding output end of the onboard OBC module outputs a level signal to the control end of the fifth switch unit, causing the fifth switch unit to enter a first operating state, connecting the second branch and disconnecting the third branch. This connects the second circuit, and the battery power module supplies power to the power-consuming module through the onboard OBC module in a direction from the first end of the fifth switch unit to the third end of the fifth switch unit.

[0049] The external power grid interface is electrically connected to the second end of the fifth switch unit, the third end of the fifth switch unit is electrically connected to the power consumption module, the first end of the onboard OBC module is electrically connected to the external power grid interface via the fourth switch unit, and the onboard OBC module is electrically connected to the battery power module, forming a third circuit. While the battery power module is supplying power to the power consumption module, the external power grid is connected to the external power grid interface, stopping the battery power module from charging the power consumption module, so that the external power grid simultaneously charges the battery power module and supplies power to the power consumption module. After the external power grid is connected to the external power grid interface, the corresponding output end of the onboard OBC module outputs a level signal, turning on the fourth switch unit and switching the fifth switch unit from the first operating state to the second operating state. At this time, the second branch switches from the on-state to the off-state, disconnecting the second circuit. Simultaneously, the third branch switches from the off-state to the on-state, connecting the third circuit. The external power grid charges the battery power module through the fourth switch unit and the onboard OBC module, and the external power grid supplies power to the power consumption module from the second end of the fifth switch unit to the third end of the fifth switch unit. The present disclosure includes a fifth switch unit that can link the on / off states of the second and third branches, allowing the third branch to be switched on while the second branch is disconnected. This allows the second circuit, which supplies power from the battery power module to the power module, to be disconnected while the third circuit, which supplies power from the off-board power grid interface to the power module, is switched on. Therefore, the present disclosure can switch the power supply path of the power module without interrupting the power supply to the power module, and the switching of the paths occurs almost simultaneously, preventing the power module from being disconnected and restarted during use, further improving the user experience.

[0050] It should be noted that the fifth switch unit being a mechanical linkage switch is only an example, and the fifth switch unit may also be other modules capable of realizing linkage switching of the second branch and the third branch, which is not specifically limited here.

[0051] In some embodiments, the fourth switch unit is a first NMOS tube, and the fifth switch unit includes a second NMOS tube and a PMOS tube; the first end of the vehicle-mounted OBC module is electrically connected to the first pole of the first NMOS tube and the first pole of the second NMOS tube, the off-vehicle power grid interface is electrically connected to the second pole of the first NMOS tube and the first pole of the PMOS tube, and the power module is electrically connected to the second pole of the second NMOS tube and the second pole of the PMOS tube; the first output end of the vehicle-mounted OBC module is electrically connected to the gate of the first NMOS tube, and the gate of the second NMOS tube and the gate of the PMOS tube are both electrically connected to the second output end of the vehicle-mounted OBC module.

[0052] Specifically, the fifth switch unit includes a second NMOS transistor and a PMOS transistor, and the gate of the second NMOS transistor and the gate of the PMOS transistor are electrically connected to the second output terminal of the vehicle-mounted OBC module. When the second output terminal of the vehicle-mounted OBC module is on, the fifth switch unit simultaneously connects the second branch and disconnects the third branch, i.e., the first working state, or simultaneously disconnects the second branch and connects the third branch, i.e., the second working state.

[0053] The external power grid interface is electrically connected to the first end of the onboard OBC module via a first NMOS transistor. The onboard OBC module is then electrically connected to the battery power module, forming a first circuit. When the external power grid is connected to the external power grid interface, the first output end of the onboard OBC module outputs a high-level signal to the gate of the first NMOS transistor, turning on the first NMOS transistor and, in turn, completing the first circuit. The external power grid charges the battery power module through the turned-on first NMOS transistor and the onboard OBC module.

[0054] The battery power module is electrically connected to the onboard OBC module. The first end of the onboard OBC module is electrically connected to the power consumption module via a PMOS transistor, forming a second circuit. When the power consumption module is using power, the second output end of the onboard OBC module outputs a low-level signal to the gate of the PMOS transistor and the gate of the second NMOS transistor, turning on the PMOS transistor and turning off the second NMOS transistor. This, in turn, connects the second branch and disconnects the third branch. At this point, the second circuit is connected, and the battery power module supplies power to the power consumption module via the onboard OBC module and the PMOS transistor.

[0055] The external power grid interface is electrically connected to the power consumption module via the second NMOS transistor. The first end of the on-board OBC module is electrically connected to the external power grid interface via the first NMOS transistor. The on-board OBC module is electrically connected to the battery power module, forming a third circuit. While the battery power module is supplying power to the power consumption module, the external power grid is connected to the external power grid interface, stopping the battery power module from charging the power consumption module. This allows the external power grid to simultaneously charge the battery power module and supply power to the power consumption module. After the external power grid is connected to the external power grid interface, the first and second output terminals of the on-board OBC module both output high-level signals, causing the PMOS transistor to turn off. At this point, the second branch switches from an on state to an off state, disconnecting the second circuit. Simultaneously, the first and second NMOS transistors are turned on, switching the first and third branches from an off state to an on state, connecting the third circuit. The external power grid charges the battery power module via the first NMOS transistor and the on-board OBC module, and the external power grid supplies power to the power consumption module via the second NMOS transistor.

[0056] The present disclosure connects the PMOS tube and the second NMOS tube to the same output terminal and receives the same level signal, so that when a high level signal is output, the PMOS tube is turned off and the second NMOS tube is turned on, and when a low level signal is output, the PMOS tube is turned on and the second NMOS tube is turned off, thereby realizing the linkage between the PMOS tube and the second NMOS tube in turning on and off. Furthermore, it is possible to turn on the third branch while the second branch is disconnected, realizing that while the second circuit from the battery power module to the power module is cut off, the third circuit from the off-vehicle power grid interface to the power module is turned on. Therefore, the present disclosure can switch the power supply path of the power module without interrupting the power supply to the power module, and the switching of the path occurs almost simultaneously, so that the power module will not be powered off and restarted during use, further improving the user experience.

[0057] In some embodiments, the off-vehicle power grid interface includes a detection unit; the detection unit is electrically connected to the on-vehicle OBC module; the detection unit is used to detect whether the off-vehicle power grid interface is connected to the off-vehicle power grid.

[0058] Specifically, a detection unit is provided in the external power grid interface. After the external power grid is connected to the external power grid interface, the detection unit outputs a corresponding level signal to the on-board OBC module. The on-board OBC module determines whether the external power grid is connected to the external power grid interface based on the received level signal, and outputs the level signal to the switch module through the output end, thereby realizing the control of the on and off of the switch module.

[0059] In some embodiments, the vehicle-mounted OBC module includes: a charging and discharging unit and a control unit; the control end of the charging and discharging unit is electrically connected to the first output end of the control unit, the second output end of the control unit is electrically connected to the control end of the switch module, and the input end of the control unit is electrically connected to the detection unit; the control unit is used to switch the charging and discharging state of the charging and discharging unit according to the detection conditions of the detection unit, and to control the working state of the switch module.

[0060] Specifically, when the detection unit detects that the external power grid is connected to the external power grid interface, it sends a level signal to the input terminal of the control unit. The control unit determines whether the external power grid is connected to the external power grid interface based on the received level signal. When it is determined that the external power grid is connected to the external power grid interface, the control unit switches the charging and discharging unit to the charging state, and turns on the branch of the switch module that charges the battery power module from the external power grid, and / or the branch that supplies power to the power consumption module from the external power grid, and turns off the branch that supplies power to the power consumption module from the battery power module, thereby enabling the external power grid to charge the battery power module and enable the external power grid to supply power to the power supply module. When it is determined that the external power grid is not connected to the external power grid interface, the control unit switches the charging and discharging unit to the discharging state, and turns on the branch of the switch module that supplies power to the power consumption module from the battery power module, and turns off the other branches, thereby enabling the battery power module to supply power to the power consumption module.

[0061] Figure 2 A schematic diagram of a preferred charge and discharge control circuit provided in an embodiment of the present disclosure is shown in FIG. Figure 2 As shown, the charge and discharge control circuit includes: an off-vehicle power grid interface 400 , a first relay 140 , a second relay 150 , a third relay 160 , a charge and discharge unit 310 , a control unit 320 , a battery power module 200 and a power consumption module 500 .

[0062] The external power grid interface 400 is electrically connected to the charge-discharge unit 310 via the first relay 140, and the charge-discharge unit 310 is electrically connected to the battery power module 200, forming a first circuit. The battery power module 200 is electrically connected to the charge-discharge unit 310, and the charge-discharge unit 310 is electrically connected to the power consumption module 500 via the second relay 150, forming a second circuit. The external power grid interface 400 is electrically connected to the charge-discharge unit 310 via the first relay 140, and the charge-discharge unit 310 is electrically connected to the battery power module 200. The external power grid interface 400 is also electrically connected to the power consumption module 500 via the third relay 160, forming a third circuit. The output terminals of the control unit 320 are respectively electrically connected to the control terminal 141 of the first relay 140, the control terminal 151 of the second relay 150, the control terminal 161 of the third relay 160, and the control terminal 311 of the charge-discharge unit 310. The input terminal 321 of the control unit 320 is electrically connected to the external power grid interface 400. The control unit 320 is used to switch the conduction states of the first relay 140 , the second relay 150 , and the third relay 160 to achieve on-off control of each circuit.

[0063] Specifically, when the external grid is connected to the external grid interface 400, the control unit 320 turns on the first relay 140 and switches the charge-discharge unit 310 to the charging state, completing the first circuit. The external grid charges the battery power module 200 through the first relay 140 and the charge-discharge unit 310. When the power consumption module 500 consumes power, the control unit 320 turns on the second relay 150 and switches the charge-discharge unit 310 to the discharging state, completing the second circuit. The battery power module 200 supplies power to the power consumption module 500 through the charge-discharge unit 310 and the second relay 150.

[0064] While the battery power module 200 is supplying power to the power consumption module 500, the off-board power grid can be connected to the off-board power grid interface 400, stopping the battery power module 200 from charging the power consumption module 500. This allows the off-board power grid to simultaneously charge the battery power module 200 and supply power to the power consumption module 500. The control unit 320 turns on the first relay 140 and the third relay 160, turns off the second relay 150, and switches the charge-discharge unit 310 to a charging state. At this point, the third circuit of the charge-discharge control circuit is turned on, while the second circuit is turned off. The off-board power grid charges the battery power module 200 through the first relay 140 and the charge-discharge unit 310, and supplies power to the power consumption module 500 through the third relay 160. The present disclosure switches on the third circuit while cutting off the power supply from the battery power module 200 to the power-consuming module 500. Therefore, the present disclosure switches the power supply path to the power-consuming module 500 without interrupting the power supply to the power-consuming module 500, thereby avoiding the situation where the power-consuming module 500 is powered off and restarted during use, thereby improving the user experience.

[0065] An embodiment of the present disclosure further provides a charge and discharge control system, comprising any one of the charge and discharge control circuits described above.

[0066] It can be understood that the charge and discharge control system provided in the embodiment of the present disclosure can achieve the corresponding beneficial effects of any of the charge and discharge control circuits provided in the above-mentioned embodiments, which will not be described in detail here.

[0067] The embodiments of the present disclosure also provide a vehicle, comprising the above-mentioned charge and discharge control system.

[0068] It can be understood that the vehicle provided by the embodiment of the present disclosure can achieve the corresponding beneficial effects of the charging and discharging control system provided by the above-mentioned embodiment, which will not be elaborated here.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0070] The above are merely specific embodiments of the present disclosure, intended to enable those skilled in the art to understand and implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not limited to these embodiments, but is to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A charge and discharge control circuit, characterized in that: include: Switch module, battery power module, on-board OBC module, off-board power grid interface and power consumption module; The external power grid interface, the switch module, the on-board OBC module, and the battery power module are electrically connected to form a first loop; the battery power module, the on-board OBC module, the switch module, and the power module are electrically connected to form a second loop; the switch module, the battery power module, the on-board OBC module, the external power grid interface, and the power module are electrically connected to form a third loop; The off-vehicle power grid is connected to the off-vehicle power grid interface, the first circuit is turned on, and the off-vehicle power grid charges the battery power module through the switch module and the on-vehicle OBC module; The power-consuming module consumes electricity, the second circuit is turned on, and the battery power module takes electricity through the on-board OBC module and the switch module to supply power to the power-consuming module; When the power-consuming module consumes electricity, the off-vehicle power grid is connected to the off-vehicle power grid interface, the second circuit is disconnected and the third circuit is connected, the off-vehicle power grid charges the battery power module through the switch module and the on-board OBC module, and the off-vehicle power grid supplies power to the power-consuming module through the switch module.

2. The charge and discharge control circuit according to claim 1, wherein: The switch module includes a first switch unit, a second switch unit and a third switch unit; The first end of the on-board OBC module is electrically connected to the first end of the first switch unit and the first end of the second switch unit, the off-board power grid interface is electrically connected to the second end of the first switch unit and the first end of the third switch unit, the power consumption module is electrically connected to the second end of the second switch unit and the second end of the third switch unit, and the control end of the first switch unit, the control end of the second switch unit, and the control end of the third switch unit are electrically connected to the output ends of the on-board OBC module in a one-to-one correspondence; The external power grid is connected to the external power grid interface, the first switch unit is turned on, and the first loop is turned on; The power-consuming module consumes electricity, the second switch unit is turned on, and the second circuit is turned on; When the power consumption module consumes power, the off-vehicle power grid is connected to the off-vehicle power grid interface, the first switch unit and the third switch unit are turned on, the second switch unit is turned off, and the third circuit is turned on while the second circuit is turned off.

3. The charge and discharge control circuit according to claim 2, wherein: The first switch unit is a first relay, the second switch unit is a second relay, and the third switch unit is a third relay; The first end of the on-board OBC module is electrically connected to the first end of the first relay and the first end of the second relay, the off-vehicle power grid interface is electrically connected to the second end of the first relay and the first end of the third relay, the power consumption module is electrically connected to the second end of the second relay and the second end of the third relay, and the control end of the first relay, the control end of the second relay, and the control end of the third relay are electrically connected to the various output ends of the on-board OBC module in a one-to-one correspondence.

4. The charge and discharge control circuit according to claim 2, characterized in that: The first switch unit is a first MOS transistor, the second switch unit is a second MOS transistor, and the third switch unit is a third MOS transistor; The first end of the on-board OBC module is electrically connected to the first electrode of the first MOS tube and the first electrode of the second MOS tube, the off-vehicle power grid interface is electrically connected to the second electrode of the first MOS tube and the first electrode of the third MOS tube, the power consumption module is electrically connected to the second electrode of the second MOS tube and the second electrode of the third MOS tube, and the gate of the first MOS tube, the gate of the second MOS tube, and the gate of the third MOS tube are electrically connected to the respective output ends of the on-board OBC module in a one-to-one correspondence.

5. The charge and discharge control circuit according to claim 1, wherein: The switch module includes a fourth switch unit and a fifth switch unit; The first end of the on-board OBC module is electrically connected to the first end of the fourth switch unit and the first end of the fifth switch unit, the off-board power grid interface is electrically connected to the second end of the fourth switch unit and the second end of the fifth switch unit, the power module is electrically connected to the third end of the fifth switch unit, and the control end of the fourth switch unit and the control end of the fifth switch unit are electrically connected to the respective output ends of the on-board OBC module; The external power grid is connected to the external power grid interface, the fourth switch unit is turned on, and the first circuit is turned on; The power-consuming module consumes power, the fifth switch unit switches to the first working state, and the second circuit is turned on; When the power consumption module consumes power, the off-vehicle power grid is connected to the off-vehicle power grid interface, the fourth switch unit is turned on, the fifth switch unit is switched to the second working state, the third circuit is turned on and the second circuit is disconnected; The first working state is a working state in which the first end of the fifth switch unit is conductively connected to the third end of the fifth switch unit, and the second working state is a working state in which the second end of the fifth switch unit is conductively connected to the third end of the fifth switch unit.

6. The charge and discharge control circuit according to claim 5, characterized in that: The fourth switch unit is a first NMOS transistor, and the fifth switch unit includes a second NMOS transistor and a PMOS transistor; The first end of the on-board OBC module is electrically connected to the first pole of the first NMOS tube and the first pole of the second NMOS tube, the off-vehicle power grid interface is electrically connected to the second pole of the first NMOS tube and the first pole of the PMOS tube, and the power consumption module is electrically connected to the second pole of the second NMOS tube and the second pole of the PMOS tube; the first output end of the on-board OBC module is electrically connected to the gate of the first NMOS tube, and the gate of the second NMOS tube and the gate of the PMOS tube are both electrically connected to the second output end of the on-board OBC module.

7. The charge and discharge control circuit according to any one of claims 1 to 6, characterized in that: The off-vehicle power grid interface includes a detection unit; The detection unit is electrically connected to the vehicle-mounted OBC module; the detection unit is used to detect whether the external power grid interface is connected to the external power grid.

8. The charge and discharge control circuit according to claim 7, characterized in that: The vehicle-mounted OBC module includes: a charging and discharging unit and a control unit; The control end of the charge and discharge unit is electrically connected to the first output end of the control unit, the second output end of the control unit is electrically connected to the control end of the switch module, and the input end of the control unit is electrically connected to the detection unit; the control unit is used to switch the charge and discharge state of the charge and discharge unit according to the detection situation of the detection unit, and to control the working state of the switch module.

9. A charge and discharge control system, characterized in that: The charging and discharging control circuit comprises the charging and discharging control circuit according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Including the charge and discharge control system according to claim 9.

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