Direct-current charging module and direct-current charging pile

Abstract

Provided in the embodiments of the present application are a direct-current charging module and a direct-current charging pile. The direct-current charging module comprises an AC / DC converter, a DC / DC converter, an internal controller, a first internal power source, a second internal power source and a wake-up module, wherein an input end of the AC / DC converter is connected to an alternating-current power source, and an output end of the AC / DC converter is connected to an input end of the DC / DC converter and a power supply end of the first internal power source; the internal controller is used for sending a turning-off signal to the first internal power source upon receiving a dormancy instruction sent by the wake-up module, such that the first internal power source is turned off; when the first internal power source is turned off, the internal controller, the AC / DC converter and the DC / DC converter are all in a dormant state; and the second internal power source is used for supplying power to the wake-up module when the first internal power supply is turned off. By means of the embodiments of the present application, the standby power consumption of a direct-current charging module can be reduced.

Description

DC charging module and DC charging pile Technical Field

[0001] The present application relates to the field of electronic circuit technology, and in particular to a DC charging module and a DC charging pile. Background Art

[0002] The rapid development of new energy vehicles has led to significant investment in charging infrastructure. Currently, China has over 700,000 public DC charging stations. Assuming one station is equipped with five DC charging modules, the installed base of DC charging modules has exceeded 3.5 million. Based on the current standby power consumption of 15W per DC charging module, the total power consumption of DC charging modules in standby mode (calculated as 12 hours per day) exceeds 630,000 kWh. Therefore, reducing the standby power consumption of DC charging modules has become an urgent issue.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a DC charging module and a DC charging pile, which can reduce the standby power consumption of the DC charging module.

[0005] A first aspect of an embodiment of the present application provides a DC charging module, comprising an AC / DC converter, a DC / DC converter, an internal controller, a first internal power supply, a second internal power supply, and a wake-up module; an input end of the AC / DC converter is connected to an AC power supply, and an output end of the AC / DC converter is connected to an input end of the DC / DC converter and a power supply end of the first internal power supply;

[0006] the internal controller is configured to, upon receiving a sleep instruction sent by the wake-up module, send a shutdown signal to the first internal power supply to shut down the first internal power supply; when the first internal power supply is shut down, the internal controller, the AC / DC converter, and the DC / DC converter are all in a sleep state;

[0007] The second internal power supply is used to supply power to the wake-up module when the first internal power supply is turned off.

[0008] Optionally, the wake-up module is configured to send an enable signal to the first internal power supply upon receiving a wake-up command, so as to turn on the first internal power supply;

[0009] The first internal power supply is configured to supply power to the internal controller, the AC / DC converter, the DC / DC converter, and the wake-up module when the first internal power supply is turned on;

[0010] The second internal power supply is configured to stop supplying power to the wake-up module when the first internal power supply is turned on.

[0011] Optionally, the AC power supply includes a three-phase AC power supply, and the power supply end of the second internal power supply is connected to one phase of the three-phase AC power supply.

[0012] Optionally, the DC charging module also includes a first capacitor, a second capacitor and a third capacitor; the positive pole of the power supply end of the second internal power supply is connected to one phase of the three-phase AC power supply, the first phase of the three-phase AC power supply is connected to the first end of the first capacitor, the second phase of the three-phase AC power supply is connected to the first end of the second capacitor, the third phase of the three-phase AC power supply is connected to the first end of the third capacitor, and the second end of the first capacitor, the second end of the second capacitor, and the third end of the third capacitor are connected to the negative pole of the power supply end of the second internal power supply.

[0013] Optionally, the capacitances of the three capacitors are equal.

[0014] Optionally, the AC / DC converter includes a first inductor, a second inductor, a third inductor, a bus capacitor, a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a fifth switching tube, a sixth switching tube, a first body diode, a second body diode, a third body diode, a fourth body diode, a fifth body diode, and a sixth body diode;

[0015] The first end of the first inductor is connected to the first phase of the three-phase AC power supply, the first end of the second inductor is connected to the second phase of the three-phase AC power supply, the first end of the third inductor is connected to the third phase of the three-phase AC power supply, the second end of the first inductor is connected to the first end of the first switching tube, the anode of the first body diode, the first end of the fourth switching tube, and the cathode of the fourth body diode, the second end of the second inductor is connected to the first end of the second switching tube, the anode of the second body diode, the first end of the fifth switching tube, and the cathode of the fifth body diode, the second end of the third inductor is connected to the first end of the third switching tube, the anode of the third body diode, the cathode of the sixth switching tube The first end of the first switching tube, the second end of the second switching tube, the second end of the third switching tube, the cathode of the first body diode, the cathode of the second body diode, the cathode of the third body diode and the positive electrode of the bus capacitor are connected; the second end of the fourth switching tube, the second end of the fifth switching tube, the second end of the sixth switching tube, the anode of the fourth body diode, the anode of the fifth body diode, the anode of the sixth body diode and the negative electrode of the bus capacitor are connected; the positive electrode of the power supply end of the first internal power supply is connected to the positive electrode of the bus capacitor, and the negative electrode of the power supply end of the first internal power supply is connected to the negative electrode of the bus capacitor.

[0016] Optionally, a power supply end of the second internal power supply is connected to an output end of the AC / DC converter.

[0017] Optionally, the DC charging module further includes a first diode, the power supply end of the wake-up module is connected to the output end of the first internal power supply and the cathode of the first diode, and the anode of the first diode is connected to the output end of the second internal power supply;

[0018] When the first internal power supply is started, the voltage at the output end of the first internal power supply is greater than the voltage at the output end of the second internal power supply.

[0019] Optionally, the internal controller is further configured to turn off the second internal power supply when the first internal power supply is turned on.

[0020] Optionally, the internal controller is configured to send a shutdown signal to the first internal power supply upon receiving a sleep instruction sent by the wake-up module to shut down the first internal power supply, including:

[0021] The internal controller is configured to send an enable signal to the second internal power supply upon receiving the sleep instruction sent by the wake-up module, so as to turn on the second internal power supply;

[0022] The internal controller is further configured to send a shutdown signal to the first internal power supply after sending an enable signal to the second internal power supply, so as to shut down the first internal power supply.

[0023] Optionally, the wake-up module includes a controller area network (CAN) communication controller.

[0024] A second aspect of the embodiments of the present application provides a DC charging pile, comprising the DC charging module and an AC power supply as described in any one of the first aspects of the embodiments of the present application.

[0025] In the DC charging module of an embodiment of the present application, upon receiving a sleep command from the wake-up module, the internal controller sends a shutdown signal to the first internal power supply, thereby shutting down the first internal power supply. When the first internal power supply is shut down, the internal controller, the AC / DC converter, and the DC / DC converter are all in a sleep state. When the first internal power supply is shut down, the second internal power supply supplies power to the wake-up module. Upon receiving a sleep command from the wake-up module, the embodiment of the present application shuts down the first internal power supply, putting the internal controller, the AC / DC converter, and the DC / DC converter in a sleep state, thereby reducing the standby power consumption of the DC charging module. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0027] FIG1 is a schematic structural diagram of a DC charging module provided in an embodiment of the present application;

[0028] FIG2 is a schematic structural diagram of another DC charging module provided in an embodiment of the present application;

[0029] FIG3 is a schematic structural diagram of another DC charging module provided in an embodiment of the present application;

[0030] FIG4 is a schematic structural diagram of an AC / DC converter provided in an embodiment of the present application;

[0031] FIG5 is a schematic structural diagram of another DC charging module provided in an embodiment of the present application;

[0032] FIG6 is a schematic structural diagram of another DC charging module provided in an embodiment of the present application;

[0033] FIG7 is a schematic structural diagram of a DC charging pile provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0035] The terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, not to describe a particular order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, product, or apparatus.

[0036] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0037] Please refer to Figure 1, which is a schematic diagram of the structure of a DC charging module provided in an embodiment of the present application. As shown in Figure 1, the DC charging module 100 may include an AC / DC converter 10, a DC / DC converter 20, an internal controller 30, a first internal power supply 41, a second internal power supply 42, and a wake-up module 50; the input end of the AC / DC converter 10 is connected to an AC power source, and the output end of the AC / DC converter 10 is connected to the input end of the DC / DC converter 20 and the power supply end of the first internal power supply 41;

[0038] The internal controller 30 is configured to, upon receiving a sleep instruction sent by the wake-up module 50, send a shutdown signal to the first internal power supply 41 to shut down the first internal power supply 41; when the first internal power supply 41 is shut down, the internal controller 30, the AC / DC converter 10, and the DC / DC converter 20 are all in a sleep state;

[0039] The second internal power supply 42 is configured to supply power to the wake-up module 50 when the first internal power supply 41 is turned off.

[0040] An AC / DC converter (also known as an AC-DC converter) is a device that converts alternating current (AC) to direct current (DC). The AC / DC converter 10 may include a switching transistor, a voltage sampling module, a current sampling module, and the like.

[0041] In the dormant state, the AC / DC converter 10 does not have a power factor correction (PFC) function and can maintain a low-power DC output. The AC / DC converter 10 can operate normally when powered by the first internal power supply 41. In the normal operating state, the AC / DC converter 10 has a PFC function to ensure a high-power DC output.

[0042] A direct current / direct current converter (DC / DC) is a device that converts a DC power source into another DC voltage. A DC / DC converter can convert high voltages to low voltages, or vice versa. The DC / DC converter 20 may include a switching transistor, a transformer, a voltage sampling module, a current sampling module, and the like. The DC / DC converter 20 can convert one type of direct current into another type of direct current.

[0043] The internal controller 30 can control the on or off of the switch tube in the AC / DC converter 10, can obtain the voltage sampling results of the voltage sampling module and the current sampling results of the current sampling module in the AC / DC converter 10, and can control the on or off of the switch tube in the AC / DC converter 10 according to the voltage sampling results of the voltage sampling module in the AC / DC converter 10 and the current sampling results of the current sampling module in the AC / DC converter 10.

[0044] The internal controller 30 can control the on / off of the switch tube in the DC / DC converter 20, obtain the voltage sampling results of the voltage sampling module and the current sampling results of the current sampling module in the DC / DC converter 20, and control the on / off of the switch tube in the DC / DC converter 20 according to the voltage sampling results of the voltage sampling module in the DC / DC converter 20 and the current sampling results of the current sampling module in the DC / DC converter 20.

[0045] The wake-up module 50 can send a sleep command to the internal controller 30 when it receives a sleep command. The wake-up module 50 can receive a sleep command sent by an external controller and send the sleep command to the internal controller 30. The external controller can be a controller other than the DC charging module, such as a controller of a DC charging pile. A DC charging pile can include multiple DC charging modules, and the controller of the DC charging pile can be used to control whether each DC charging module is working. For example, when it is detected that the DC charging module has no charging demand (for example, when the user unplugs the charging gun from the DC charging pile), the controller of the DC charging pile can send a sleep command to the wake-up module of the DC charging module to put the DC charging module into a sleep state.

[0046] The wake-up module 50 may be a module capable of sending a control signal (eg, a sleep command or a wake-up command).

[0047] In one possible embodiment, the wake-up module 50 may be a Controller Area Network (CAN) communication controller. The CAN communication controller is an existing module on a DC charging station. The existing CAN communication controller can be used as the wake-up module, eliminating the need for a new module and reducing costs.

[0048] In one possible embodiment, the wake-up module 50 may be a controller of a DC charging pile, which may directly send a sleep instruction to the internal controller 30. The controller of the DC charging pile may also directly send a wake-up instruction to the first internal power supply 41 to turn on the first internal power supply 41.

[0049] The wake-up module 50 needs to be continuously powered and can promptly wake up the DC charging module when a charging demand is detected. When no charging demand is detected, the internal controller 30 is promptly notified to shut down the first internal power supply 41, putting the DC charging module into a dormant state, thereby reducing the standby power consumption of the DC charging module.

[0050] The first internal power supply 41 may be a DC-to-DC power supply module, and may convert the DC voltage output by the AC / DC converter 10 into a voltage for supplying power to each module.

[0051] The first internal power supply 41 can power the switch tube, voltage sampling module, current sampling module, etc. in the AC / DC converter 10. The first internal power supply 41 can power the switch tube, transformer, voltage sampling module, current sampling module, etc. in the DC / DC converter 20.

[0052] When the first internal power source 41 is turned on, the first internal power source 41 can supply power to the wake-up module 50. When the first internal power source 41 is turned off, the second internal power source 42 can supply power to the wake-up module 50.

[0053] When the first internal power source 41 is turned off, the internal controller 30 , the AC / DC converter 10 , and the DC / DC converter 20 are all in a dormant state and do not generate power consumption.

[0054] The operating power of the second internal power source 42 is less than the operating power of the first internal power source 41. The operating power of the second internal power source 42 is less than the standby power of the first internal power source 41. For example, if the operating power of the first internal power source 41 is 40 watts (W), the standby power of the first internal power source 41 is 15 W, and the operating power of the second internal power source 42 is 1 W.

[0055] The power consumption of the first internal power supply 41 in standby mode is different from the power consumption when the first internal power supply 41 is turned off. In the absence of the second internal power supply 42, when the first internal power supply 41 is in standby mode, the first internal power supply 41 needs to power the internal controller 30, the driver chip for the switching transistors in the AC / DC converter 10, and the driver chip for the switching transistors in the DC / DC converter 20, and the first internal power supply 41 still consumes power. When the first internal power supply 41 is turned off, the power consumption of the first internal power supply 41 is zero, and the first internal power supply 41 does not consume any power.

[0056] In an embodiment of the present application, when a sleep command is received from the wake-up module, the first internal power supply is turned off, and the internal controller, AC / DC converter, and DC / DC converter are all in a sleep state. When the internal controller, AC / DC converter, and DC / DC converter are all in a sleep state, no energy is consumed, thereby reducing the standby power consumption of the DC charging module.

[0057] Optionally, the wake-up module 50 is configured to send an enable signal to the first internal power supply 41 upon receiving a wake-up command, so as to turn on the first internal power supply 41;

[0058] The first internal power supply 41 is used to supply power to the internal controller 30, the AC / DC converter 10, the DC / DC converter 20 and the wake-up module 50 when the first internal power supply 41 is turned on;

[0059] The second internal power supply 42 can be an AC-to-DC power module or a DC-to-DC power module. When the second internal power supply 42 is an AC-to-DC power module, the second internal power supply 42 can be powered by an AC power source. When the second internal power supply 42 is a DC-to-DC power module, the second internal power supply 42 can be powered by the output terminal of the AC / DC converter 10.

[0060] The second internal power supply 42 is used to supply power to the wake-up module 50 when the first internal power supply 41 is turned off, and is also used to stop supplying power to the wake-up module 50 when the first internal power supply 41 is turned on.

[0061] In an embodiment of the present application, when a charging demand is detected, the controller of the DC charging pile can send a wake-up command to the wake-up module 50. When receiving the wake-up command, the wake-up module 50 can directly send an enable signal to the first internal power supply 41 to turn on the first internal power supply 41. After the first internal power supply 41 is turned on, it can supply power to the internal controller 30, the AC / DC converter 10, the DC / DC converter 20 and the wake-up module 50 to ensure that the DC charging module can work normally.

[0062] When the first internal power supply 41 is turned on, the second internal power supply 42 stops supplying power to the wake-up module 50. The second internal power supply 42 stops supplying power to the wake-up module 50 because the second internal power supply 42 is turned off or because the power supply voltage output by the first internal power supply 41 to the wake-up module 50 is greater than the power supply voltage output by the second internal power supply 42 to the wake-up module 50.

[0063] The internal controller 30 sends a shutdown signal to the first internal power supply 41, which can disconnect the power supply end of the first internal power supply 41 from the output end of the AC / DC converter 10. Please refer to Figure 2, which is a structural schematic diagram of another DC charging module provided in an embodiment of the present application. As shown in Figure 2, a first switch S1 can be set in the first internal power supply 41, and the first switch S1 can be set between the power supply end of the first internal power supply 41 and the output end of the AC / DC converter 10 (the first switch S1 can be set outside the first internal power supply 41, or it can be set inside the first internal power supply 41. Figure 2 takes the setting inside the first internal power supply 41 as an example). When the first switch S1 receives a shutdown signal, the first switch S1 is disconnected and the first internal power supply 41 is turned off. When the first switch S1 receives an enable signal, the first switch S1 is turned on and the first internal power supply 41 is turned on.

[0064] The first switch S1 can be any one of a relay, an insulated gate bipolar transistor (IGBT), a triode, and a metal-oxide-semiconductor field-effect transistor (MOSFET). MOSFET can be simply referred to as a MOS transistor. When the first switch S1 is an N-type MOS transistor, the enable signal is a high-level signal, and the disable signal is a low-level signal.

[0065] Optionally, the AC / DC converter 10 is configured to convert alternating current into first direct current to power the first internal power supply 41 when the first internal power supply 41 is started;

[0066] The DC / DC converter 20 is configured to convert the first direct current into a second direct current output when the first internal power source 41 is started and under the control of the internal controller 30 .

[0067] When the first internal power supply 41 is turned on, the first internal power supply 41 is used to convert the first direct current output by the AC / DC converter 10 into a third direct current, and use the third direct current to power the internal controller 30, the driver chip of the switch tube of the AC / DC converter 10, the DC / DC converter 20, and the wake-up module 50. The voltage of the third direct current is different from the voltage of the first direct current.

[0068] When the AC / DC converter 10 is in a dormant state, the AC / DC converter 10 is capable of converting alternating current into a fourth direct current. The voltage of the fourth direct current may be different from or the same as the voltage of the first direct current. When the first internal power supply 41 is awakened by the awakening module 50, the first internal power supply 41 can draw power from the output of the AC / DC converter 10, convert the fourth direct current into a third direct current, and then use the third direct current to power the internal controller 30, the driver chip of the switch tube of the AC / DC converter 10, the DC / DC converter 20, and the awakening module 50.

[0069] Please refer to Figure 3, which is a schematic diagram of the structure of another DC charging module provided in an embodiment of the present application. Figure 3 is obtained on the basis of Figure 1. As shown in Figure 3, the AC power supply includes a three-phase AC power supply, and the power supply end of the second internal power supply 42 is connected to one phase of the three-phase AC power supply. The three phases of the three-phase AC power supply are the first phase L1, the second phase L2, and the third phase L3. In Figure 3, the power supply end of the second internal power supply 42 is connected to the first phase L1 of the three-phase AC power supply. Figure 3 takes the case where the power supply end of the second internal power supply 42 is connected to the first phase L1 of the three-phase AC power supply as an example.

[0070] Among them, L1, L2, and L3 correspond to the input of three-phase electricity respectively, and L1, L2, and L3 are all live wires.

[0071] In an embodiment of the present application, the second internal power supply 42 can be an AC-to-DC power supply module. The second internal power supply 42 draws power from one phase of the three-phase AC power supply. Compared with drawing power from all three phases of the three-phase AC power supply, the DC voltage output by the second internal power supply 42 after AC-to-DC conversion is lower. The second internal power supply 42 can use power devices with low withstand voltage (i.e., power devices with relatively low voltage stress), which can save costs. The second internal power supply 42 only works when the first internal power supply 41 is turned off to power the wake-up module 50. When the first internal power supply 41 is working, the second internal power supply 42 is not working. The second internal power supply 42 draws power from one phase of the three-phase AC power supply, and will not affect the three-phase imbalance of the power grid.

[0072] As shown in Figure 3, the DC charging module also includes a first capacitor C1, a second capacitor C2 and a third capacitor C3; the positive pole of the power supply end of the second internal power supply 42 is connected to one phase of the three-phase AC power supply, the first phase L1 of the three-phase AC power supply is connected to the first end of the first capacitor C1, the second phase L2 of the three-phase AC power supply is connected to the first end of the second capacitor C2, the third phase L3 of the three-phase AC power supply is connected to the first end of the third capacitor C3, the second end of the first capacitor C1, the second end of the second capacitor C2, and the third end of the third capacitor C3 are connected to the negative pole of the power supply end of the second internal power supply 42.

[0073] The capacitances of the first capacitor C1 , the second capacitor C2 and the third capacitor C3 are equal.

[0074] When the capacitances of C1, C2, and C3 are equal, the voltage at the node where C1, C2, and C3 are connected in parallel is the same as the voltage of the neutral line. The second internal power supply 42 obtains the voltage of one phase from the node where L1 and C1, C2, and C3 are connected in parallel.

[0075] Please refer to Figure 4, which is a schematic diagram of the structure of an AC / DC converter provided by an embodiment of the present application. As shown in Figure 4, the AC / DC converter 10 includes a first inductor Lr1, a second inductor Lr2, a third inductor Lr3, a bus capacitor C bus , a first switching tube Q1, a second switching tube Q2, a third switching tube Q3, a fourth switching tube Q4, a fifth switching tube Q5, a sixth switching tube Q6, a first body diode D1, a second body diode D2, a third body diode D3, a fourth body diode D4, a fifth body diode D5 and a sixth body diode D6;

[0076] A first end of the first inductor Lr1 is connected to the first phase L1 of the three-phase AC power supply, a first end of the second inductor Lr2 is connected to the second phase L2 of the three-phase AC power supply, a first end of the third inductor Lr3 is connected to the third phase L3 of the three-phase AC power supply, a second end of the first inductor Lr1 is connected to the first end of the first switching tube Q1, the anode of the first body diode D1, the first end of the fourth switching tube Q4 and the cathode of the fourth body diode D4, a second end of the second inductor Lr2 is connected to the first end of the second switching tube Q2, the anode of the second body diode D1, the first end of the fourth switching tube Q4 and the cathode of the fourth body diode D4. The positive electrode of the fifth switching transistor D2, the first end of the fifth switching transistor Q5 and the cathode of the fifth body diode D5, the second end of the third inductor Lr3 is connected to the first end of the third switching transistor Q3, the positive electrode of the third body diode D3, the first end of the sixth switching transistor Q6 and the cathode of the sixth body diode D6, the second end of the first switching transistor Q1, the second end of the second switching transistor Q2, the second end of the third switching transistor Q3, the cathode of the first body diode D1, the cathode of the second body diode D2, the cathode of the third body diode D3 and the bus capacitor C bus The positive electrode of the fourth switch tube Q4, the second end of the fifth switch tube Q5, the second end of the sixth switch tube Q6, the positive electrode of the fourth body diode D4, the positive electrode of the fifth body diode D5, the positive electrode of the sixth body diode D6 and the bus capacitor C bus The positive electrode of the power supply end of the first internal power supply 41 is connected to the bus capacitor C bus The positive electrode of the first internal power supply 41 is connected to the bus capacitor C bus of the negative electrode.

[0077] The switch tube in FIG4 can be any one of a relay, an insulated gate bipolar transistor (IGBT), a triode, and a metal-oxide-semiconductor field-effect transistor (MOSFET). A MOSFET can be simply referred to as a MOS tube. The switch tube in FIG4 takes an N-type MOS tube (i.e., an NMOS tube) as an example. The first and second ends of the switch tube can be the source and drain of the NMOS tube.

[0078] The first body diode D1, the second body diode D2, the third body diode D3, the fourth body diode D4, the fifth body diode D5 and the sixth body diode D6 are the body diodes of the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6 respectively.

[0079] The third end of the switch tube in Figure 4 (for example, the gate of the MOS tube) can be connected to the driver chip corresponding to each switch tube, and the driver chip is powered by the first internal power supply 41. When the first internal power supply 41 is turned off, the driver chips of the switch tubes in Figure 4 lose power. At this time, the first inductor Lr1, the second inductor Lr2, the third inductor Lr3, the first body diode D1, the second body diode D2, the third body diode D3, the fourth body diode D4, the fifth body diode D5 and the sixth body diode D6 of the AC / DC converter 10 form a three-phase rectifier bridge, which still has a rectification function and can convert the three-phase AC power of the three-phase AC power supply into a DC output. After the wake-up module 50 sends an enable signal to the first internal power supply 41, the first internal power supply 41 can draw power from the output end of the AC / DC converter 10 so that the first internal power supply 41 can be turned on immediately. After the first internal power supply 41 is turned on, it can power the driver chip of the switch tube, and the internal controller 30 can control the conduction or shutdown of the switch tube in the AC / DC converter 10, so that the AC / DC converter 10 can operate normally.

[0080] Optionally, a power supply end of the second internal power supply 42 is connected to an output end of the AC / DC converter 10 .

[0081] In the embodiment of the present application, the second internal power source 42 can be powered by the output terminal of the AC / DC converter 10. The second internal power source 42 can be a DC-to-DC power module.

[0082] Please refer to Figure 5, which is a schematic diagram of the structure of another DC charging module provided in an embodiment of the present application. Figure 5 is obtained based on Figure 3. As shown in Figure 5, the DC charging module also includes a first diode D11. The power supply end of the wake-up module 50 is connected to the output end of the first internal power supply 41 and the cathode of the first diode D11. The anode of the first diode D11 is connected to the output end of the second internal power supply 42.

[0083] When the first internal power supply 41 is on, the voltage at the output of the first internal power supply 41 is greater than the voltage at the output of the second internal power supply 42. At this time, the first diode D11 is not conducting, and the wake-up module 50 is powered by the first internal power supply 41. When the first internal power supply 41 is off, the voltage at the output of the first internal power supply 41 is less than the voltage at the output of the second internal power supply 42. At this time, the first diode D11 is conducting, and the wake-up module 50 is powered by the second internal power supply 42.

[0084] In the embodiment of the present application, the standby power consumption of the second internal power supply 42 is very low, and the second internal power supply 42 can be continuously turned on. By adding a first diode D11 between the output end of the first internal power supply 41 and the output end of the second internal power supply 42, the switching of the internal power supply for powering the wake-up module 50 is realized.

[0085] Please refer to Figure 6, which is a schematic diagram of the structure of another DC charging module provided in an embodiment of the present application. Figure 6 is obtained based on Figure 3. The internal controller 30 is further configured to shut down the second internal power supply 42 when the first internal power supply 41 is turned on. The internal controller 30 can send a shutdown signal to the second internal power supply 42 to shut it down. The internal controller 30 can also send an enable signal to the second internal power supply 42 to turn it on.

[0086] As shown in FIG6 , a second switch S2 can be provided in the second internal power supply 42. The second switch S2 can be provided between the positive pole of the power supply end of the second internal power supply 42 and the first phase L1 of the three-phase AC power supply (the second switch S2 can be provided outside the second internal power supply 42 or inside the second internal power supply 42. FIG6 takes the second switch S2 provided inside the second internal power supply 42 as an example).

[0087] When the second switch S2 receives a shutdown signal, the second switch S2 is turned off, and the second internal power supply 42 is turned off. When the second switch S2 receives an enable signal, the second switch S2 is turned on, and the second internal power supply 42 is turned on.

[0088] The second switch S2 can be any one of a relay, an insulated gate bipolar transistor (IGBT), a triode, and a metal-oxide-semiconductor field-effect transistor (MOSFET). When the second switch S2 is an N-type MOS transistor, the enable signal is a high-level signal, and the disable signal is a low-level signal.

[0089] The internal controller 30 is configured to send an enable signal to the second internal power supply 42 upon receiving the sleep instruction sent by the wake-up module 50, so as to turn on the second internal power supply 42;

[0090] The internal controller 30 is further configured to send a shutdown signal to the first internal power source 41 after sending an enable signal to the second internal power source 42 , so as to shut down the first internal power source 41 .

[0091] In the embodiment of the present application, upon receiving the sleep command from the wake-up module 50, the internal controller 30 first sends an enable signal to the second internal power supply 42 to turn on the second internal power supply 42 and ensure power to the wake-up module 50. It then sends a shutdown signal to the first internal power supply 41 to turn off the first internal power supply 41. This reduces the standby power consumption of the DC charging module while ensuring that the wake-up module 50 remains powered.

[0092] The first internal power supply 41 is turned on after receiving the wake-up instruction sent by the wake-up module 50. When the first internal power supply 41 is turned on, the internal controller 30 turns off the second internal power supply 42 to reduce the overall power consumption of the DC charging module.

[0093] Please refer to Figure 7, which is a schematic diagram of the structure of a DC charging pile provided in an embodiment of the present application. As shown in Figure 7, the DC charging pile may include a DC charging module and an AC power supply.

[0094] The DC charging module in FIG7 can refer to the above embodiment and will not be described again here.

[0095] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0096] In the several embodiments provided in this application, it should be understood that the disclosed DC charging module and DC charging pile can be implemented in other ways. For example, the DC charging module embodiment described above is merely illustrative. For example, the division of the units described is merely a logical functional division. In actual implementation, other division methods may be used. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not implemented.

Claims

1. A DC charging module, characterized in that: It includes an AC / DC converter, a DC / DC converter, an internal controller, a first internal power supply, a second internal power supply and a wake-up module; the input end of the AC / DC converter is connected to an AC power supply, and the output end of the AC / DC converter is connected to the input end of the DC / DC converter and the power supply end of the first internal power supply; The internal controller is configured to send a shutdown signal to the first internal power supply when receiving a sleep instruction sent by the wake-up module, so as to shut down the first internal power supply; when the first internal power supply is shut down, the internal controller, the AC / DC converter, and the DC / DC converter are all in a sleep state; The second internal power supply is used to supply power to the wake-up module when the first internal power supply is turned off.

2. The DC charging module according to claim 1, characterized in that: The wake-up module is configured to send an enable signal to the first internal power supply upon receiving a wake-up command, so as to turn on the first internal power supply; The first internal power supply is used to supply power to the internal controller, the AC / DC converter, the DC / DC converter and the wake-up module when the first internal power supply is turned on; The second internal power supply is used to stop supplying power to the wake-up module when the first internal power supply is turned on.

3. The DC charging module according to claim 1, characterized in that: The AC power source includes a three-phase AC power source, and the power supply end of the second internal power source is connected to one phase of the three-phase AC power source.

4. The DC charging module according to claim 3, characterized in that: The DC charging module also includes a first capacitor, a second capacitor and a third capacitor; the positive pole of the power supply end of the second internal power supply is connected to one phase of the three-phase AC power supply, the first phase of the three-phase AC power supply is connected to the first end of the first capacitor, the second phase of the three-phase AC power supply is connected to the first end of the second capacitor, the third phase of the three-phase AC power supply is connected to the first end of the third capacitor, and the second end of the first capacitor, the second end of the second capacitor, and the third end of the third capacitor are connected to the negative pole of the power supply end of the second internal power supply.

5. The DC charging module according to claim 4, characterized in that: The capacitance of the first capacitor, the capacitance of the second capacitor and the capacitance of the third capacitor are equal.

6. The DC charging module according to claim 1, characterized in that: The DC charging module further includes a first diode, the power supply end of the wake-up module is connected to the output end of the first internal power supply and the cathode of the first diode, and the anode of the first diode is connected to the output end of the second internal power supply; When the first internal power source is started, a voltage at an output end of the first internal power source is greater than a voltage at an output end of the second internal power source.

7. The DC charging module according to claim 1, characterized in that: The internal controller is further configured to turn off the second internal power supply when the first internal power supply is turned on.

8. The DC charging module according to claim 7, characterized in that: The internal controller is used to send a shutdown signal to the first internal power supply to shut down the first internal power supply when receiving the sleep instruction sent by the wake-up module, including: The internal controller is configured to send an enable signal to the second internal power supply to turn on the second internal power supply when receiving the sleep instruction sent by the wake-up module; The internal controller is further configured to send a shutdown signal to the first internal power supply after sending an enable signal to the second internal power supply, so as to shut down the first internal power supply.

9. The DC charging module according to any one of claims 1 to 8, characterized in that: The wake-up module includes a controller area network (CAN) communication controller.

10. A DC charging pile, characterized in that: It comprises a DC charging module and an AC power supply as described in any one of claims 1 to 9.

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