Charging management method, power router and charging pile

Abstract

The application is suitable for the field of charging technology, and provides a charging management method, a power router and a charging pile. The detection module in the power router is used for detecting first current information, and the first current information includes currents on each phase line in the power router; the communication module is used for receiving second current information sent by a distribution box and third current information sent by other power routers associated with the power router, the second current information includes maximum currents allowed to pass through on each phase line in the distribution box, and the third current information includes currents on each phase line in the other power routers; the control module is used for determining a target phase line in the distribution box for charging an electric vehicle according to the first current information, the second current information and the third current information, and generating a selection signal according to the determined target phase line; and the switch module is used for selecting the target phase line in the distribution box to charge the electric vehicle according to the selection signal, so that currents on all phase lines in the distribution box are balanced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of charging, and particularly relates to a charging management method, a power router and a charging pile. BACKGROUND

[0002] Under the trend of gradual penetration of electric vehicles, the charging problem of electric vehicles has become a major technical difficulty. The charging of the electric vehicles on the market is currently divided into direct current charging and alternating current charging. The alternating current charging is further divided into single-phase alternating current charging, two-phase alternating current charging and three-phase alternating current charging. The electric vehicles of single-phase alternating current charging and two-phase alternating current charging often only draw part of the phase fire line electricity in the power grid. The part of the phase fire line power supply is tight, and the other phase fire line is idle, causing the load imbalance on each phase fire line in the power grid, greatly increasing the pressure of the power grid and affecting the charging efficiency of the electric vehicles. SUMMARY

[0003] The embodiments of the application provide a charging management method, a power router and a charging pile, which can solve the problem of load imbalance on each phase fire line in the power grid when the electric vehicles of single-phase alternating current charging and two-phase alternating current charging are charged.

[0004] In a first aspect, the embodiments of the application provide a charging management method applied to a power router, and the charging management method comprises the following steps.

[0005] obtaining first current information of the power router, second current information sent by a distribution box and third current information sent by other power routers associated with the power router; wherein the first current information comprises currents on each phase fire line in the power router, the second current information comprises maximum currents allowed to pass through each phase fire line in the distribution box, and the third current information comprises currents on each phase fire line in the other power routers;

[0006] determining a target fire line in the distribution box for charging the electric vehicle according to the first current information, the second current information and the third current information, and sending a selection signal to a switch module according to the determined target fire line; wherein the selection signal is used to instruct the switch module to select the target fire line in the distribution box to charge the electric vehicle, so that the currents on all fire lines in the distribution box are balanced.

[0007] In a possible implementation manner of the first aspect, the determining of the target fire line in the distribution box for charging the electric vehicle according to the first current information, the second current information and the third current information comprises the following steps.

[0008] determining a target number of fire lines required when the electric vehicle connected to the power router is charged according to the first current information;

[0009] determining, according to the third current information, a load current on each phase line in the distribution box;

[0010] determining, according to the second current information, the load current on each phase line in the distribution box, and the target number, a target phase line in the distribution box with the target number; wherein Ia < Ib, Ia is a sum of a current on a phase line corresponding to the target phase line in the power router and currents on phase lines corresponding to the target phase line in all other power routers, and Ib is a current on the target phase line in the distribution box.

[0011] In a possible implementation of the first aspect, the distribution box includes a first phase line, a second phase line, and a third phase line, and the determining, according to the third current information, a load current on each phase line in the distribution box includes:

[0012] calculating a sum of currents on phase lines corresponding to the first phase line in all other power routers as the load current on the first phase line;

[0013] calculating a sum of currents on phase lines corresponding to the second phase line in all other power routers as the load current on the second phase line;

[0014] calculating a sum of currents on phase lines corresponding to the third phase line in all other power routers as the load current on the third phase line.

[0015] In a possible implementation of the first aspect, the determining, according to the second current information, the load current on each phase line in the distribution box, and the target number, a target phase line in the distribution box with the target number includes:

[0016] when the electric vehicle charging requires a single-phase line, determining a phase line with the minimum load current in the distribution box as the target phase line;

[0017] when the electric vehicle charging requires a two-phase line, determining two-phase lines with the minimum load current in the distribution box as the target phase line;

[0018] when the electric vehicle charging requires a three-phase line, determining three-phase lines in the distribution box as the target phase line.

[0019] In a second aspect, an embodiment of the present application provides a power router, including:

[0020] a detection module configured to detect first current information, the first current information including currents on each phase line in the power router;

[0021] a communication module, configured to receive second current information sent by a distribution box and third current information sent by other power routers associated with the power router, the second current information comprising maximum currents allowed to pass through each phase line in the distribution box, and the third current information comprising currents on each phase line in other power routers;

[0022] a control module, electrically connected with the detection module and the communication module respectively, configured to determine a target phase line in the distribution box for charging the electric vehicle according to the first current information, the second current information and the third current information, and generate a selection signal according to the determined target phase line;

[0023] a switch module, electrically connected with the control module, configured to be connected in series between the distribution box and the electric vehicle, and further configured to select the target phase line in the distribution box to charge the electric vehicle according to the selection signal, so that currents on all phase lines in the distribution box are balanced.

[0024] In a possible implementation of the second aspect, the detection module comprises three current transformers, and the three current transformers are respectively installed on three phase lines in the power router, and are electrically connected with the control module.

[0025] In a possible implementation of the second aspect, when the distribution box comprises a neutral line, the switch module comprises a first switch, a second switch, a third switch, a fourth switch, a fifth switch and a sixth switch; a first end of the first switch is configured to be electrically connected with the neutral line in the distribution box, a first end of the second switch is configured to be electrically connected with a first phase line in the distribution box, a first end of the third switch and a first end of the fifth switch are configured to be electrically connected with a second phase line in the distribution box, a first end of the fourth switch and a first end of the sixth switch are configured to be electrically connected with a third phase line in the distribution box, a second end of the first switch, a second end of the second switch, a second end of the third switch, a second end of the fourth switch, a second end of the fifth switch and a second end of the sixth switch are configured to be electrically connected with the electric vehicle, and a control end of the first switch, a control end of the second switch, a control end of the third switch, a control end of the fourth switch, a control end of the fifth switch and a control end of the sixth switch are electrically connected with the control module.

[0026] In a possible implementation of the second aspect, when the distribution box does not include a zero line, the switch module includes a seventh switch, an eighth switch, a ninth switch, and a tenth switch, a first end of the seventh switch is configured to be electrically connected with a first live wire in the distribution box, a first end of the eighth switch and a first end of the ninth switch are configured to be electrically connected with a second live wire in the distribution box, a first end of the tenth switch is configured to be electrically connected with a third live wire in the distribution box, a second end of the seventh switch, a second end of the eighth switch, a second end of the ninth switch, and a second end of the tenth switch are configured to be electrically connected with the electric vehicle, and a control end of the seventh switch, a control end of the eighth switch, a control end of the ninth switch, and a control end of the tenth switch are electrically connected with the control module.

[0027] In a possible implementation of the second aspect, the communication module includes a first communication unit and a second communication unit, and the first communication unit and the second communication unit are electrically connected with the control module, the control module is configured to interact with the distribution box information through the first communication unit, and the control module is further configured to interact with other power router information through the second communication unit.

[0028] In a third aspect, an embodiment of the present application provides a charging pile, including a distribution box and a plurality of power routers according to any one of the second aspect.

[0029] Compared with the prior art, the embodiment of the present application has the following beneficial effects:

[0030] The embodiment of the present application provides a charging management method, first, obtaining first current information of a power router, second current information sent by a distribution box, and third current information sent by other power routers associated with the power router, wherein the first current information includes currents on each phase live wire in the power router, the second current information includes maximum currents allowed to pass through on each phase live wire in the distribution box, and the third current information includes currents on each phase live wire in the other power routers. Then, according to the first current information, the second current information, and the third current information, a target live wire in the distribution box for charging an electric vehicle is determined, and a selection signal is sent to a switch module according to the determined target live wire; the selection signal is used to instruct the switch module to select the target live wire in the distribution box to charge the electric vehicle, so that the currents on all live wires in the distribution box are balanced, and the problem of unbalanced load on each phase live wire in the power grid caused by single-phase alternating current charging and bidirectional alternating current charging of the electric vehicle is solved.

[0031] The application discloses an electric power router, wherein a detection module is used for detecting first current information, the first current information comprising currents on each phase live wire in the electric power router; a communication module is used for receiving second current information sent by a distribution box and third current information sent by other electric power routers associated with the electric power router, the second current information comprising maximum currents allowed to pass through each phase live wire in the distribution box, and the third current information comprising currents on each phase live wire in the other electric power routers; a control module is electrically connected with the detection module and the communication module, and is used for determining a target live wire in the distribution box for charging an electric vehicle according to the first current information, the second current information and the third current information, and generating a selection signal according to the determined target live wire; and a switch module is electrically connected with the control module, and is used for being connected in series between the distribution box and the electric vehicle, and further used for selecting the target live wire in the distribution box to charge the electric vehicle according to the selection signal, so that the currents on all the live wires in the distribution box are balanced, and the problem of unbalanced load on each phase live wire in the power grid caused by single-phase alternating current charging and bidirectional alternating current charging of the electric vehicle is solved. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0033] Figure 1 is a structural schematic diagram of a charging pile provided by an embodiment of the present application;

[0034] Figure 2 is a structural schematic diagram of an electric power router provided by an embodiment of the present application;

[0035] Figure 3 is a connection schematic diagram of a use state of an electric power router provided by an embodiment of the present application;

[0036] Figure 4 is a connection schematic diagram of a use state of an electric power router provided by another embodiment of the present application;

[0037] Figure 5 is a flow schematic diagram of a charging management method provided by an embodiment of the present application.

[0038] In the drawings: 100, distribution box; 200, electric power router; 201, detection module; 202, communication module; 203, control module; 204, switch module; 300, electric vehicle. DETAILED DESCRIPTION

[0039] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and

[0040] It will be understood that the term "includes," "including," "has," "having," "comprises," "comprising," "contains" or "containing," when used in this specification and in the following claims, specifies the presence of the stated features, integers, steps, operations, elements, and / or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0041] It will also be understood that the term "and / or," when used in this specification and in the following claims, can connote any conjunctive or disjunctive sense, in any combination, and can include any of the possible combinations of the items linked by the term.

[0042] As used in this specification and claims, the terms "if' can be interpreted to mean "when," or "once," or "in response to determining," or "in response to detecting," as appropriate, depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be interpreted to mean "once it is determined" or "in response to determining" or "once [the described condition or event] is detected" or "in response to detecting [the described condition or event]," as appropriate, depending on the context.

[0043] In addition, the terms "first," "second," "third," etc. as used in this specification and the following claims are not used to denote or otherwise connote any relative importance.

[0044] Reference throughout this specification to "one embodiment" or "an embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, the appearances of the phrases "in one embodiment" or "in some embodiments" or "in other embodiments" or "in still other embodiments" or the like in various places throughout this specification are not necessarily referring to the same embodiment of the application, unless otherwise expressly specified. The terms "including," "containing," "having," and the like are meant to be inclusive in a manner similar to the term "comprising," unless otherwise expressly specified.

[0045] As Figure 1As shown, the application provides a charging pile, which comprises a distribution box 100 and a plurality of power routers 200, the plurality of power routers 200 are respectively electrically connected with the distribution box 100, each power router 200 can perform single-phase alternating current charging, two-phase alternating current charging and three-phase alternating current charging for an electric vehicle 300, and each power router 200 can interact with the distribution box 100 and other power routers. When the power router 200 charges the electric vehicle 300, the power router 200 obtains first current information of itself, second current information sent by the distribution box 100 and third current information sent by other power routers associated with the power router 200; wherein the first current information comprises current on each phase of the power router 200, the second current information comprises maximum current allowed to pass on each phase of the distribution box 100, and the third current information comprises current on each phase of other power routers. The power router 200 determines a target phase for charging the electric vehicle 300 in the distribution box 100 according to the first current information, the second current information and the third current information, and controls the target phase in the distribution box 100 to charge the electric vehicle 300, so that the current on all phases in the distribution box 100 is balanced, and the problem of unbalanced load on each phase in the power grid caused by charging the electric vehicle 300 by single-phase alternating current charging and two-way alternating current charging is solved.

[0046] As shown in Figures 2 to 3 The power router 200 comprises a detection module 201, a communication module 202, a control module 203 and a switch module 204, and the control module 203 is electrically connected with the detection module 201, the communication module 202 and the switch module 204 respectively.

[0047] Specifically, the detection module 201 is configured to detect first current information and transmit the first current information to the control module 203, the first current information comprising currents on each phase live wire in the power router 200. The communication module 202 is configured to receive second current information transmitted by the distribution box 100 and third current information transmitted by other power routers associated with the power router 200, and transmit the second current information and the third current information to the control module 203, the second current information comprising maximum currents allowed to pass through each phase live wire in the distribution box 100, and the third current information comprising currents on each phase live wire in the other power routers. After receiving the first current information, the second current information and the third current information, the control module 203 is configured to determine a target live wire in the distribution box 100 for charging the electric vehicle 300 according to the first current information, the second current information and the third current information, generate a selection signal according to the determined target live wire, and transmit the selection signal to the switch module 204. The switch module 204 is configured to be connected in series between the distribution box 100 and the electric vehicle 300, and when the switch module 204 receives the selection signal, select the target live wire in the distribution box 100 for charging the electric vehicle 300 according to the selection signal, so that the currents on all live wires in the distribution box 100 are balanced, and the problem of unbalanced load on each phase live wire in the power grid caused by charging the electric vehicle 300 in single-phase alternating current charging and bidirectional alternating current charging is solved.

[0048] As shown in Figure 3 and Figure 4 The detection module 201 comprises three current transformers (current transformer CT1, current transformer CT2 and current transformer CT3), and the three current transformers are respectively installed on three live wires (L1, L2 and L3) in the power router 200 and are electrically connected with the control module 203.

[0049] Specifically, each current transformer is installed on a corresponding phase live wire, and the current transformer can detect the current on the live wire and transmit the detected current to the control module 203. The three current transformers can respectively detect the currents on the corresponding live wires, and the currents detected by the three current transformers are the first current information.

[0050] In an embodiment of the present application, the communication module 202 comprises a first communication unit and a second communication unit, and the first communication unit and the second communication unit are electrically connected with the control module 203.

[0051] Specifically, the control module 203 can interact with the distribution box 100 through the first communication unit, and the control module 203 can receive the second current information sent by the distribution box 100 through the first communication unit. The first communication unit can be selected from a network cable or a first wireless module, and the first wireless module can be selected from an 868 module. The control module 203 can interact with other power routers through the second communication unit, and the control module 203 can send the first current information to other power routers through the second communication unit, and can also receive the third current information sent by other power routers through the second communication unit. The first communication unit can be selected from a network cable or a second wireless module, and the second wireless module can be selected from a WiFi module or a Bluetooth module.

[0052] As shown in Figure 3 When the distribution box 100 includes a zero line L0, the switch module 204 includes a first switch K1, a second switch K2, a third switch K3, a fourth switch K4, a fifth switch K5, and a sixth switch K6. The first end of the first switch K1 is used for electrical connection with the zero line L0 in the distribution box 100, the first end of the second switch K2 is used for electrical connection with the first live wire L1 in the distribution box 100, the first end of the third switch K3 and the first end of the fifth switch K5 are both used for electrical connection with the second live wire L2 in the distribution box 100, the first end of the fourth switch K4 and the first end of the sixth switch K6 are both used for electrical connection with the third live wire L3 in the distribution box 100, the second end of the first switch K1, the second end of the second switch K2, the second end of the third switch K3, the second end of the fourth switch K4, the second end of the fifth switch K5, and the second end of the sixth switch K6 are all used for electrical connection with the electric vehicle 300, and the control end of the first switch K1, the control end of the second switch K2, the control end of the third switch K3, the control end of the fourth switch K4, the control end of the fifth switch K5, and the control end of the sixth switch K6 are all electrically connected with the control module 203.

[0053] Specifically, when the power router 200 is connected with the electric vehicle 300, the common end of the second end of the second switch K2, the second end of the third switch K3, and the second end of the fourth switch K4 is electrically connected with the electric vehicle 300.

[0054] When the charging mode of the electric vehicle 300 is three-phase alternating current charging, the control module 203 controls the first switch K1, the second switch K2, the fifth switch K5, and the sixth switch K6 to be conductive, and controls the third switch K3 and the fourth switch K4 to be disconnected, at this time the power router 200 performs three-phase alternating current charging for the electric vehicle 300.

[0055] When the charging mode of the electric vehicle 300 is single-phase alternating current charging, the control module 203 can control the first switch K1 and the second switch K2 to be turned on, and control other switches to be turned off, at this time, the first firewire L1 charges the electric vehicle 300; the control module 203 can also control the first switch K1 and the third switch K3 to be turned on, and control other switches to be turned off, at this time, the second firewire L2 charges the electric vehicle 300; the control module 203 can also control the first switch K1 and the fourth switch K4 to be turned on, and control other switches to be turned off, at this time, the third firewire L3 charges the electric vehicle 300.

[0056] When the power router 200 starts to charge the electric vehicle 300, the control module 203 in the power router 200 obtains the second current information and the third current information through communication, and the control module 203 also obtains the first current information of itself through the detection module 201. The control module 203 determines the target number of firewires required when the electric vehicle 300 connected to the power router 200 is charging according to the first current information, and determines the load current on each phase firewire in the distribution box 100 according to the third current information. Then, according to the second current information, the load current on each phase firewire in the distribution box 100, and the target number, the target firewires of the target number in the distribution box 100 are determined; wherein, Ia < Ib, Ia is the sum of the current on the firewire corresponding to the target firewire in the power router 200 and the current on the firewire corresponding to the target firewire in all other power routers, Ib is the current on the target firewire in the distribution box 100, and finally the selection signal is sent to the switch module 204 according to the determined target firewire. After receiving the selection signal, the switch module 204 selects the target firewire in the distribution box 100 to charge the electric vehicle 300 according to the selection signal, so that the currents on all firewires in the distribution box 100 are balanced, solving the problem of unbalanced load on each phase firewire in the power grid when the electric vehicle 300 is charging in single-phase alternating current charging and bidirectional alternating current charging.

[0057] As shown in Figure 4 When the distribution box 100 does not include the zero line L0, the switch module 204 includes the seventh switch K7, the eighth switch K8, the ninth switch K9 and the tenth switch K10, the first end of the seventh switch K7 is used for electrical connection with the first firewire L1 in the distribution box 100, the first end of the eighth switch K8 and the first end of the ninth switch K9 are both used for electrical connection with the second firewire L2 in the distribution box 100, the first end of the tenth switch K10 is used for electrical connection with the third firewire L3 in the distribution box 100, the second end of the seventh switch K7, the second end of the eighth switch K8, the second end of the ninth switch K9 and the second end of the tenth switch K10 are all used for electrical connection with the electric vehicle 300, and the control end of the seventh switch K7, the control end of the eighth switch K8, the control end of the ninth switch K9 and the control end of the tenth switch K10 are all electrically connected with the control module 203.

[0058] Specifically, when the power router 200 is connected with the electric vehicle 300, the common end of the second end of the eighth switch K8 and the second end of the tenth switch K10 is electrically connected with the electric vehicle 300.

[0059] When the charging mode of the electric vehicle 300 is three-phase alternating current charging, the control module 203 controls the seventh switch K7, the ninth switch K9 and the tenth switch K10 to be turned on, and controls other switches to be turned off, at this time, the power router 200 performs three-phase alternating current charging for the electric vehicle 300.

[0060] When the charging mode of the electric vehicle 300 is single-phase alternating current charging, the control module 203 can control the seventh switch K7 and the eighth switch K8 to be turned on, and control other switches to be turned off, at this time, the L2 phase live wire charges the electric vehicle 300; the control module 203 can also control the seventh switch K7 and the tenth switch K10 to be turned on, and control other switches to be turned off, at this time, the L3 phase live wire charges the electric vehicle 300.

[0061] When the power router 200 starts charging the electric vehicle 300, the control module 203 in the power router 200 obtains the second current information and the third current information through communication, and the control module 203 also obtains the first current information of itself through the detection module 201. The control module 203 determines the target number of live wires required when the electric vehicle 300 connected with the power router 200 is charging according to the first current information, and determines the load current on each phase live wire in the distribution box 100 according to the third current information. Then, according to the second current information, the load current on each phase live wire in the distribution box 100 and the target number, the target live wire of the target number is determined in the distribution box 100; wherein, Ia < Ib, Ia is the sum of the current on the live wire corresponding to the target live wire in the power router 200 and the current on the live wire corresponding to the target live wire in all other power routers, Ib is the current on the target live wire in the distribution box 100, and finally the selection signal is sent to the switch module 204 according to the determined target live wire. After receiving the selection signal, the switch module 204 selects the target live wire in the distribution box 100 to charge the electric vehicle 300 according to the selection signal, so that the current on all live wires in the distribution box 100 is balanced, solving the problem of unbalanced load on each phase live wire in the power grid when the electric vehicle 300 is charging in single-phase alternating current charging and bidirectional alternating current charging.

[0062] Figure 5 A flowchart of a charging management method provided by an embodiment of the application is shown. Referring to FIG. 5, the charging management method includes steps S501 and S502. Figure 5 As shown, the charging management method includes steps S501 and S502.

[0063] In step S501, the first current information of the power router 200, the second current information sent by the distribution box 100, and the third current information sent by other power routers associated with the power router 200 are acquired; wherein the first current information includes the current on each phase line in the power router 200, the second current information includes the maximum current allowed to pass on each phase line in the distribution box 100, and the third current information includes the current on each phase line in other power routers.

[0064] Specifically, the first current information is detected by the detection module 201 in the power router 200, the power router 200 can communicate with the distribution box 100 and other power routers, and the power router 200 can acquire the second current information sent by the distribution box 100 and the third current information sent by other power routers through the communication module 202.

[0065] In step S502, the target phase line in the distribution box 100 for charging the electric vehicle 300 is determined according to the first current information, the second current information, and the third current information, and a selection signal is sent to the switch module 204 according to the determined target phase line; wherein the selection signal is used to instruct the switch module 204 to select the target phase line in the distribution box 100 for charging the electric vehicle 300, so that the currents on all phase lines in the distribution box 100 are balanced.

[0066] Specifically, the power router 200 determines the target number of phase lines required for charging the electric vehicle 300 connected to the power router 200 according to the first current information, records the phase lines with currents greater than a preset current in the power router 200 as effective phase lines, then counts the number of effective phase lines, and records the number of effective phase lines as the target number. The designer can set the specific value of the preset current according to actual needs, for example, the preset current is 0.1A.

[0067] The power router 200 determines the load current on each phase line in the distribution box 100 according to the third current information. The sum of the currents on the phase lines corresponding to the first phase line in all other power routers is calculated and recorded as the load current on the first phase line. The sum of the currents on the phase lines corresponding to the second phase line in all other power routers is calculated and recorded as the load current on the second phase line. The sum of the currents on the phase lines corresponding to the third phase line in all other power routers is calculated and recorded as the load current on the third phase line.

[0068] The power router 200 determines the target number of target fire lines in the distribution box 100 according to the second current information, the load current on each phase fire line in the distribution box 100 and the target number; wherein Ia < Ib, Ia is the sum of the current on the fire line corresponding to the target fire line in the power router 200 and the current on the fire line corresponding to the target fire line in all other power routers, Ib is the current on the target fire line in the distribution box 100.

[0069] When the electric vehicle 300 needs to charge with one phase fire line, the fire line with the minimum load current in the distribution box 100 is determined as the target fire line. When the electric vehicle 300 needs to charge with two phase fire lines, the two phase fire lines with the minimum load current in the distribution box 100 are determined as the target fire lines. When the electric vehicle 300 needs to charge with three phase fire lines, the three phase fire lines in the distribution box 100 are determined as the target fire lines; wherein Ia < Ib, Ia is the sum of the current on the fire line corresponding to the target fire line in the power router 200 and the current on the fire line corresponding to the target fire line in all other power routers, Ib is the current on the target fire line in the distribution box 100. Thus, the current balance of all fire lines in the distribution box 100 is ensured, and the problem of unbalanced load on each phase fire line in the power grid caused by the charging of the single-phase alternating current charging and bidirectional alternating current charging electric vehicle 300 is solved.

[0070] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A charge management method of a power router, characterized by, The charging management method is applied to a power router capable of single-phase alternating current charging, two-phase alternating current charging and three-phase alternating current charging for an electric vehicle, and comprises the following steps: A detection module of the power router acquires first current information of the power router itself; A communication module of the power router receives second current information sent by a distribution box and third current information sent by other power routers associated with the power router; wherein the first current information comprises current on each phase line in the power router, the second current information comprises maximum current allowed to pass on each phase line in the distribution box, and the third current information comprises current on each phase line in other power routers; A control module of the power router is electrically connected with the detection module and the communication module, respectively, determines a target phase line in the distribution box for charging the electric vehicle according to the first current information, the second current information and the third current information, and sends a selection signal to a switch module according to the determined target phase line; The switch module of the power router is electrically connected with the control module and is connected in series between the distribution box and the electric vehicle, selects the target phase line in the distribution box to charge the electric vehicle according to the selection signal, so that the current on all phase lines in the distribution box is balanced; The determination of the target phase line in the distribution box for charging the electric vehicle according to the first current information, the second current information and the third current information comprises the following steps: According to the first current information, the target number of phase lines required for charging the electric vehicle connected with the power router is determined; According to the third current information, load current on each phase line in the distribution box is determined; According to the second current information, the load current on each phase line in the distribution box and the target number, the target number of target phase lines in the distribution box is determined; wherein Ia < Ib, Ia is the sum of current on the phase line corresponding to the target phase line in the power router and current on the phase line corresponding to the target phase line in all other power routers, and Ib is the maximum current allowed on the target phase line in the distribution box; The determination of the target number of target phase lines in the distribution box according to the second current information, the load current on each phase line in the distribution box and the target number comprises the following steps: When the electric vehicle charging requires one phase line, the phase line with the minimum load current in the distribution box is determined as the target phase line; When the electric vehicle charging requires two phase lines, the two phase lines with the minimum load current in the distribution box are determined as the target phase lines; When the electric vehicle charging requires three phase lines, the three phase lines in the distribution box are determined as the target phase lines.

2. The charge management method according to claim 1, characterized by, The distribution box comprises a first phase line, a second phase line and a third phase line, and the determination of the load current on each phase line in the distribution box according to the third current information comprises the following steps: calculating the sum of the currents on the corresponding firewire of the first phase firewire in all other power routers as the load current on the first phase firewire; calculating the sum of the currents on the corresponding firewire of the second phase firewire in all other power routers as the load current on the second phase firewire; calculating the sum of the currents on the corresponding firewire of the third phase firewire in all other power routers as the load current on the third phase firewire.

3. An electrical power router, characterized by The power router can perform single-phase AC charging, two-phase AC charging and three-phase AC charging for the electric vehicle, and the power router comprises: a detection module configured to detect first current information, the first current information comprising currents on each phase firewire in the power router; a communication module configured to receive second current information sent by a distribution box and third current information sent by other power routers associated with the power router, the second current information comprising maximum currents allowed to pass through each phase firewire in the distribution box, and the third current information comprising currents on each phase firewire in other power routers; a control module electrically connected to the detection module and the communication module, configured to determine a target firewire in the distribution box for charging the electric vehicle according to the first current information, the second current information and the third current information, and to generate a selection signal according to the determined target firewire; the determination of the target firewire in the distribution box for charging the electric vehicle according to the first current information, the second current information and the third current information comprises: determining a target number of firewires required for charging the electric vehicle connected to the power router according to the first current information; determining load currents on each phase firewire in the distribution box according to the third current information; and determining the target number of target firewires in the distribution box according to the second current information, the load currents on each phase firewire in the distribution box and the target number, wherein Ia < Ib, Ia is the sum of the current on the corresponding firewire of the target firewire in the power router and the current on the corresponding firewire of the target firewire in all other power routers, and Ib is the maximum current allowed on the target firewire in the distribution box; the determination of the target number of target firewires in the distribution box according to the second current information, the load currents on each phase firewire in the distribution box and the target number comprises: when one-phase firewire is required for charging the electric vehicle, determining the firewire with the minimum load current in the distribution box as the target firewire; when two-phase firewires are required for charging the electric vehicle, determining two-phase firewires with the minimum load currents in the distribution box as the target firewires; and when three-phase firewires are required for charging the electric vehicle, determining three-phase firewires in the distribution box as the target firewires; a switch module electrically connected to the control module, configured to be connected in series between the distribution box and the electric vehicle, and to select the target firewires in the distribution box for charging the electric vehicle according to the selection signal, so that the currents on all firewires in the distribution box are balanced.

4. The power router of claim 3, wherein, The detection module comprises three current transformers, the three current transformers are respectively installed on three live wires in the power router, and the three current transformers are electrically connected with the control module.

5. The power router of claim 3, wherein, When the distribution box comprises a zero line, the switch module comprises a first switch, a second switch, a third switch, a fourth switch, a fifth switch and a sixth switch; a first end of the first switch is used for being electrically connected with the zero line in the distribution box, a first end of the second switch is used for being electrically connected with the first live wire in the distribution box, a first end of the third switch and a first end of the fifth switch are both used for being electrically connected with the second live wire in the distribution box, a first end of the fourth switch and a first end of the sixth switch are both used for being electrically connected with the third live wire in the distribution box, a second end of the first switch, a second end of the second switch, a second end of the third switch, a second end of the fourth switch, a second end of the fifth switch and a second end of the sixth switch are all used for being electrically connected with the electric vehicle, and a control end of the first switch, a control end of the second switch, a control end of the third switch, a control end of the fourth switch, a control end of the fifth switch and a control end of the sixth switch are all electrically connected with the control module.

6. The power router of claim 3, wherein, When the distribution box does not comprise a zero line, the switch module comprises a seventh switch, an eighth switch, a ninth switch and a tenth switch, a first end of the seventh switch is used for being electrically connected with the first live wire in the distribution box, a first end of the eighth switch and a first end of the ninth switch are both used for being electrically connected with the second live wire in the distribution box, a first end of the tenth switch is used for being electrically connected with the third live wire in the distribution box, a second end of the seventh switch, a second end of the eighth switch, a second end of the ninth switch and a second end of the tenth switch are all used for being electrically connected with the electric vehicle, and a control end of the seventh switch, a control end of the eighth switch, a control end of the ninth switch and a control end of the tenth switch are all electrically connected with the control module.

7. The power router of claim 3, wherein, The communication module comprises a first communication unit and a second communication unit, the first communication unit and the second communication unit are both electrically connected with the control module, the control module is used for interacting with the distribution box information through the first communication unit, and the control module is also used for interacting with other power router information through the second communication unit.

8. A charging station, characterized in that The distribution box and a plurality of power routers as claimed in any one of claims 3-7 are comprised, and the plurality of power routers are respectively electrically connected with the distribution box.

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