Charging load management system and management method

Abstract

The invention discloses a charging load management system and method, and the system is characterized in that a power grid is connected with the first end of each first charging pile, the second end of each first charging pile is connected with an electric vehicle, and the power grid supplies power to the electric vehicle through the first charging piles; the first end of the load management module is connected with the third end of each first charging pile, and the load management module is used for obtaining the output current of the first charging pile in the working state in real time and outputting the output current of the first charging pile when at least one new charging pile is connected with the electric vehicle. And according to the pre-output current of the newly added first charging pile and the output current of the first charging pile in the working state, determining the pre-output total current of the first charging pile, and according to the pre-output total current and the preset current, controlling the output current of each working charging pile for supplying power to the electric vehicle. The power distribution equipment connected with the power grid is prevented from being damaged, and it is guaranteed that the power grid can continuously and stably supply power to the electric vehicle through the first charging pile.

Description

Technical Field

[0001] The present invention relates to the technical field of charging load management, and in particular to a charging load management system and method. Background Art

[0002] In recent years, the development of new energy vehicles is an inevitable trend in the development of the automobile industry. Intelligence, environmental protection and energy saving will be the general trend of automobile development. As the number of electric vehicles continues to increase, the safety and reliability of the power grid are also tested.

[0003] However, in the prior art, when charging piles are used, it is easy for the power distribution equipment connected to the power grid to be damaged due to excessive number of charging piles in use. Summary of the invention

[0004] The present invention provides a charging load management system and management method to avoid damage to power distribution equipment connected to a power grid, thereby ensuring that the power grid can continuously and stably supply power to the electric vehicle through a first charging pile.

[0005] According to one aspect of the present invention, a charging load management system is provided, the charging load management system comprising:

[0006] A plurality of first charging piles and a load management module;

[0007] The power grid is connected to the first end of each first charging pile, the second end of the first charging pile is connected to the electric vehicle, and the power grid supplies power to the electric vehicle through the first charging pile; the first end of the load management module is connected to the third end of each first charging pile, and the load management module is used to obtain the output current of the first charging pile in a working state in real time, and when at least one first charging pile is newly added and connected to the electric vehicle, the load management module determines the pre-output total current of the first charging pile according to the pre-output current of the newly added first charging pile connected to the electric vehicle and the output current of the first charging pile in a working state, and controls the output current of each working charging pile to supply power to the electric vehicle according to the pre-output total current and the preset current; wherein the working charging pile includes the first charging pile in a working state and the newly added first charging pile connected to the electric vehicle.

[0008] Furthermore, the load management module is used to:

[0009] Compare the pre-output total current with the preset current;

[0010] If the total pre-output current is less than or equal to the preset current, controlling the newly added first charging pile connected to the electric vehicle to supply power to the electric vehicle according to the pre-output current;

[0011] If the total pre-output current is greater than the preset current, the working charging pile is current limited according to the preset current.

[0012] Furthermore, the load management module is used to:

[0013] If the total pre-output current is greater than the preset current, the preset current is divided by the number of working charging piles to determine the current-limited output current of each working charging pile.

[0014] Furthermore, the load management module is used to:

[0015] If the total pre-output current is greater than the preset current, the output current of each working charging pile is determined according to the preset current, the pre-output current of the newly added first charging pile connected to the electric vehicle, and the output current of each first charging pile in working state.

[0016] Furthermore, the charging load management system also includes:

[0017] Detection module;

[0018] The detection module is arranged at the output port of the power grid, the first end of the detection module is connected to the second end of the load management module, and the detection module is used to collect the power supply current of the output port of the power grid in real time and transmit the power supply current to the load management module;

[0019] The load management module is used to determine the output current of each working charging pile according to the difference between the power supply current and the preset current when the power supply current is greater than the preset current.

[0020] Furthermore, the charging load management system also includes:

[0021] Scheduling module and transmission module;

[0022] The dispatching module is connected to the third end of the load management module through the transmission module, and the dispatching module and the load management module exchange information through the transmission module.

[0023] Furthermore, the scheduling module is used to send the first charging pile power supply control information to the load management module to remotely adjust the output current of any first charging pile.

[0024] Furthermore, the charging load management system also includes:

[0025] at least one standby load management module and a plurality of second charging piles;

[0026] The power grid is connected to the first end of each second charging pile, the second end of the second charging pile is connected to the electric vehicle, and the power grid supplies power to the electric vehicle through the second charging pile; the first end of the standby load management module is connected to the third end of each second charging pile, and the second end of the standby load management module is connected to the fourth end of the load management module;

[0027] The standby load management module is used to collect the working status information of each second charging pile in real time, and transmit the working status information of each second charging pile to the load management module;

[0028] The load management module is used to receive the working status information of each second charging pile, and send the second charging pile power supply control information to the standby load management module according to the working status information of each second charging pile, the total pre-output current of the plurality of first charging piles and the preset current;

[0029] The standby load management module is used to control the working state of each second charging pile according to the second charging pile power supply control information.

[0030] Furthermore, the load management module is also used to:

[0031] When one or some first charging piles communicate abnormally with the load management module, a new preset current is determined according to the preset current and the number of first charging piles that communicate abnormally with the load management module, and the output current of the working charging pile is controlled according to the new preset current.

[0032] According to another aspect of the present invention, a charging load management method is provided, the charging load management method comprising:

[0033] Acquire the output current of the first charging pile in working state in real time;

[0034] When at least one newly added first charging pile is connected to the electric vehicle, the total pre-output current of the first charging pile is determined according to the pre-output current of the newly added first charging pile connected to the electric vehicle and the output current of the first charging pile in working state;

[0035] The output current of each working charging pile for supplying power to the electric vehicle is controlled according to the pre-output total current and the preset current; wherein the working charging pile includes a first charging pile in a working state and a newly added first charging pile connected to the electric vehicle.

[0036] The charging load management system provided by the embodiment of the present invention obtains the output current of the first charging pile in a working state in real time, and when at least one first charging pile is newly added and connected to the electric vehicle, determines the total pre-output current of the first charging piles according to the pre-output current of the newly added first charging pile connected to the electric vehicle and the output current of the first charging pile in a working state, and controls the output current of each working charging pile to supply power to the electric vehicle according to the pre-output total current and the preset current, thereby realizing overall control of the output currents of multiple first charging piles through the load management module, avoiding the sum of the output currents of each first charging pile exceeding the maximum current allowed to flow through the distribution equipment connected to the power grid, thereby avoiding damage to the distribution equipment connected to the power grid, and ensuring that the power grid can continuously and stably supply power to the electric vehicle through the first charging piles.

[0037] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 is a structural schematic diagram of a charging load management system provided according to an embodiment of the present invention;

[0040] Figure 2 is a structural schematic diagram of another charging load management system provided according to an embodiment of the present invention;

[0041] Figure 3 is a structural schematic diagram of another charging load management system provided according to an embodiment of the present invention;

[0042] Figure 4 is a structural schematic diagram of another charging load management system provided according to an embodiment of the present invention;

[0043] Figure 5 is a flow chart of a charging load management method provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] The embodiment of the present invention provides a charging load management system. Figure 1 is a schematic diagram of a charging load management system provided according to an embodiment of the present invention, with reference to Figure 1 , the charging load management system includes:

[0047] A plurality of first charging piles 1 and a load management module 2;

[0048] The power grid 3 is connected to the first end of each first charging pile 1, the second end of the first charging pile 1 is connected to the electric vehicle 4, and the power grid 3 supplies power to the electric vehicle through the first charging pile 1; the first end of the load management module 2 is connected to the third end of each first charging pile 1, and the load management module 2 is used to obtain the output current of the first charging pile 1 in a working state in real time, and when at least one new first charging pile 1 is connected to the electric vehicle, the load management module 2 determines the pre-output total current of the first charging pile 1 according to the pre-output current of the newly added first charging pile 1 connected to the electric vehicle and the output current of the first charging pile 1 in a working state, and controls the output current of each working charging pile to supply power to the electric vehicle according to the pre-output total current and the preset current; wherein the working charging pile includes the first charging pile 1 in a working state and the newly added first charging pile 1 connected to the electric vehicle.

[0049] Among them, all of the multiple first charging piles 1 can be AC ​​charging piles, or all can be DC charging piles, or AC charging piles and DC charging piles can be mixed, and multiple can be understood as two or more than two. The number of first charging piles 1 can be set according to actual conditions, and the embodiment of the present invention does not limit this. The load management module 2 can be connected to each first charging pile 1 through a wired communication module, and can also be connected to each first charging pile 1 through a wireless communication module, wherein the wired communication module includes a CAN communication module, an RS485 communication module, etc., and the wireless communication module includes a ZigBee communication module, a LoRa communication module, a Wi-SUN communication module, etc.; and the load management module 2 can be integrated inside any first charging pile 1. At least one can be understood as one or more than one, and one or more first charging piles 1 can be added to connect to the electric vehicle. For example, if a new first charging pile 1 is connected to the electric vehicle, in the k1th electric vehicle N k1 When the first charging pile 1 is connected, all the electric vehicles N except the k1th electric vehicle can be charged. k1 Other than kn electric vehicles kn Connect to a first charging pile 1 that is not connected to an electric vehicle, wherein the first charging pile 1 needs to be connected to the electric vehicle one by one, wherein the number of electric vehicles is less than or equal to the number of first charging piles 1. The preset current can be set according to actual conditions, and can be less than or equal to the maximum output current of the output end of the power grid 3.

[0050] Specifically, the load management module 2 can detect the working state of each first charging pile 1 in real time, and obtain the output current of the first charging pile 1 in the working state. If it is necessary to add one or more first charging piles 1 to connect to the electric vehicle to power the electric vehicle, it is necessary to obtain the pre-output current of the newly added first charging pile 1 connected to the electric vehicle when the first charging pile 1 is connected to the electric vehicle, and sum the pre-output current of each newly added first charging pile 1 connected to the electric vehicle and the output current of each first charging pile 1 in the working state to determine the total pre-output current of the first charging pile 1. The pre-output total current can be compared with the preset current, and each working charging pile can be controlled to supply power to the electric vehicle based on the comparison result. For example, if the pre-output total current is less than or equal to the preset current, the newly added first charging pile 1 connected to the electric vehicle is controlled to supply power to the electric vehicle according to the pre-output current. If the pre-output total current is greater than the preset current, the working charging pile is current limited according to the preset current. The pre-output total current can also be subtracted from the preset current to determine a first difference, and each working charging pile can be controlled to supply power to the electric vehicle based on the first difference. For example, if the first difference is less than or equal to 0, the newly added first charging pile 1 connected to the electric vehicle is controlled to supply power to the electric vehicle according to the pre-output current. If the first difference is greater than 0, the working charging pile is current limited according to the preset current. After charging is completed, one / some first charging piles 1 will send charging completion information to the load management module 2. The load management module 2 will control the output current of each first charging pile 1 according to the charging completion information. For example, before the charging of a first charging pile 1 is completed, the output current of the first charging pile 1 is an output current that has been processed by current limiting. After the charging of the first charging pile 1 is completed, the load management module 2 will recalculate the output current of each working charging pile to power the electric vehicle according to the number of working charging piles.

[0051] The charging load management system provided by the embodiment of the present invention obtains the output current of the first charging pile 1 in a working state in real time, and when at least one new first charging pile 1 is connected to the electric vehicle, determines the total pre-output current of the first charging pile 1 according to the pre-output current of the newly added first charging pile 1 connected to the electric vehicle and the output current of the first charging pile 1 in a working state, and controls the output current of each working charging pile to supply power to the electric vehicle according to the pre-output total current and the preset current, thereby realizing overall control of the output currents of multiple first charging piles 1 through the load management module 2, avoiding the sum of the output currents of each first charging pile 1 exceeding the maximum current allowed to flow through the distribution equipment connected to the power grid 3, thereby avoiding damage to the distribution equipment connected to the power grid 3, and ensuring that the power grid 3 can continuously and stably supply power to the electric vehicle through the first charging pile 1.

[0052] Furthermore, the load management module is used to:

[0053] Compare the pre-output total current with the preset current;

[0054] If the total pre-output current is less than or equal to the preset current, controlling the newly added first charging pile connected to the electric vehicle to supply power to the electric vehicle according to the pre-output current;

[0055] If the total pre-output current is greater than the preset current, the working charging pile is current limited according to the preset current.

[0056] Specifically, if the total pre-output current is less than or equal to the preset current, it means that based on the output current of the first charging pile in working state, the pre-output current of the newly added first charging pile connected to the electric vehicle cannot exceed the preset current close to the maximum output current of the power grid output end. At this time, the newly added first charging pile connected to the electric vehicle can be controlled to power the electric vehicle according to the pre-output current.

[0057] If the total pre-output current is greater than the preset current, it means that the pre-output current of the newly added first charging pile connected to the electric vehicle, based on the output current of the first charging pile in working state, has exceeded the preset current close to the maximum output current of the power grid output end. In order to ensure that the first charging pile can sustainably and stably supply power to the electric vehicle, the working charging pile needs to be current limited at this time so that the total pre-output current is less than or equal to the preset current. For example, the preset current can be divided by the number of working charging piles to determine the output current of each working charging pile. Alternatively, each working charging pile can be current limited according to the current output ratio of each working charging pile so that the total pre-output current is less than or equal to the preset current.

[0058] Furthermore, the load management module is used to:

[0059] If the total pre-output current is greater than the preset current, the preset current is divided by the number of working charging piles to determine the current-limited output current of each working charging pile.

[0060] Specifically, if the total pre-output current is greater than the preset current, the preset current can be divided by the number of working charging piles to ensure that the output current for each electric vehicle is the same. At this time, each working charging pile can be controlled to power the electric vehicle with the same current-limited output current.

[0061] Furthermore, the load management module is used to:

[0062] If the total pre-output current is greater than the preset current, the output current of each working charging pile is determined according to the preset current, the pre-output current of the newly added first charging pile connected to the electric vehicle, and the output current of each first charging pile in working state.

[0063] Specifically, the current output ratio of each working charging pile can be determined by the pre-output current of the newly added first charging pile connected to the electric vehicle and the output current of each first charging pile in a working state, and the preset current is multiplied by the current output ratio of each working charging pile to determine the current-limited output current of each working charging pile, and each working charging pile is controlled to power the electric vehicle according to the corresponding current-limited output current. For example, if the output currents of the two first charging piles in a working state are 100A and 100A respectively, and the pre-output current of the newly added first charging pile is 120A, it can be determined that the total pre-output current is 320A and the current output ratio is 5:5:6. If the preset current is 300A, the total pre-output current is greater than the preset current. At this time, the preset current is multiplied by the current output ratio of each working charging pile, that is, the current-limited output currents of the two first charging piles in a working state are both 300*5 / 16=93.75A, and the current-limited output current of the newly added first charging pile is 300*6 / 16=112.5A.

[0064] Furthermore, Figure 2 is a schematic diagram of the structure of another charging load management system provided according to an embodiment of the present invention, with reference to Figure 2 , the charging load management system also includes:

[0065] Detection module 5;

[0066] The detection module 5 is arranged at the output port of the power grid 3, and the first end of the detection module 5 is connected to the second end of the load management module 2. The detection module 5 is used to collect the power supply current of the output port of the power grid 3 in real time, and transmit the power supply current to the load management module 2;

[0067] The load management module 2 is used to determine the output current of each working charging pile according to the difference between the power supply current and the preset current when the power supply current is greater than the preset current.

[0068] Specifically, the load management module 2 can compare the power supply current detected in real time by the detection module 5 with the preset current. If the power supply current is less than or equal to the preset current, it means that the output current on the grid side does not exceed the preset current close to the maximum output current of the output end of the grid 3. At this time, each working charging pile can be controlled to continue to supply power to the electric vehicle according to the current output current; if the power supply current is greater than the preset current, it means that the grid 3 is supplying power to the electric vehicle through the first charging pile 1 while also supplying power to other loads. At this time, the power supply current can be subtracted from the preset current to determine the second difference, and the preset update current can be determined based on the difference between the preset current and the second difference, and the output current of each working charging pile can be determined based on the preset update current. For example, the output current of each working charging pile can be determined by dividing the preset update current by the number of working charging piles, or each working charging pile can be current limited based on the current output ratio of each working charging pile so that the total pre-output current is less than or equal to the preset current. Among them, the detection module 5 can be a smart meter. Exemplarily, the smart meter can also be integrated into the load management module 2 to collect the power supply current and power supply voltage of the output port of the power grid 3 in real time, and calculate the output power of the output port of the power grid 3 based on the power supply voltage and power supply current.

[0069] Furthermore, Figure 3 is a schematic diagram of a charging load management system according to an embodiment of the present invention, with reference to Figure 3 , the charging load management system also includes:

[0070] Scheduling module 6 and transmission module 7;

[0071] The scheduling module 6 is connected to the third end of the load management module 2 via the transmission module 7 , and the scheduling module 6 and the load management module 2 exchange information via the transmission module 7 .

[0072] Specifically, the load management module 2 can transmit the working information of each first charging pile 1 to the scheduling module 6 through the transmission module 7 at the first preset frequency, so as to store the working information of each first charging pile 1 through the scheduling module 6, so that the staff can view the working information of each first charging pile 1 in real time. At the same time, the staff can send the first charging pile power supply control information to the load management module 2 through the transmission module 7 according to the actual situation, so as to control the output current of at least one first charging pile 1 through the load management module 2. Among them, the transmission module 7 can be a wired transmission module or a wireless transmission module. For example, the wired transmission module can be Ethernet, and the wireless transmission module can be a 4G transmission module, a WiFi transmission module, etc., which is not limited in this embodiment of the present invention.

[0073] Furthermore, the scheduling module is used to send the first charging pile power supply control information to the load management module to remotely adjust the output current of any first charging pile.

[0074] Specifically, when the load management module turns on remote operation control, it can receive the first charging pile power supply control information sent by the scheduling module, so that the scheduling module can remotely control the output current of the first charging pile. Exemplarily, the scheduling module can directly adjust the output current of any first charging pile, or it can adjust the preset current set in the load management module to adjust the output current of each first charging pile.

[0075] Furthermore, Figure 4 is a schematic diagram of a charging load management system according to an embodiment of the present invention, with reference to Figure 4 , the charging load management system also includes:

[0076] At least one standby load management module 8 and a plurality of second charging posts 9;

[0077] The power grid 3 is connected to the first end of each second charging pile 9, the second end of the second charging pile 9 is connected to the electric vehicle, and the power grid 3 supplies power to the electric vehicle through the second charging pile 9; the first end of the standby load management module 8 is connected to the third end of each second charging pile 9, and the second end of the standby load management module 8 is connected to the fourth end of the load management module 2;

[0078] The standby load management module 8 is used to collect the working status information of each second charging pile 9 in real time, and transmit the working status information of each second charging pile 9 to the load management module 2;

[0079] The load management module 2 is used to receive the working status information of each second charging pile 9, and send the second charging pile power supply control information to the standby load management module 2 according to the working status information of each second charging pile 9, the total pre-output current of the plurality of first charging piles 1 and the preset current;

[0080] The standby load management module 8 is used to control the working state of each second charging pile 9 according to the second charging pile power supply control information.

[0081] Among them, at least one can be understood as one or more than one, and the number of standby load management modules 8 can be set according to actual conditions, and the embodiment of the present invention does not limit this. The number of second charging piles 9 can be the same as the number of first charging piles 2, or it can be different from the number of first charging piles 2. The standby load management module 8 can exchange information with the load management module 2 through the RS485 communication module, and can also exchange information with the load management module 2 through other communication modules. The standby load management module 8 can be connected to each second charging pile 9 through a wired communication module, and can also be connected to each second charging pile 9 through a wireless communication module, wherein the wired communication module includes a CAN communication module, an RS485 communication module, etc., and the wireless communication module includes a ZigBee communication module, a LoRa communication module, a Wi-SUN communication module, etc.; and the standby load management module 8 can be integrated inside any second charging pile 9.

[0082] Specifically, the standby load management module 8 can collect the working status information of each second charging pile 9 in real time, and transmit the working status information of each second charging pile 9 to the load management module 2, wherein the working status information can be the working status, output current, pre-output current and other information of the second charging pile 9. The load management module 2 calculates the total pre-output current of the first charging pile 1 and the second charging pile 9 according to the working status information of each second charging pile 9 and the total pre-output current of multiple first charging piles 1, and compares the total pre-output current with the preset current, controls each working charging pile to supply power to the electric vehicle according to the comparison result, and generates the second charging pile power supply control information, and transmits the second charging pile power supply control information to the standby load management module 2. The standby load management module 2 collects the working status of each second charging pile 9 according to the second charging pile power supply control information. For example, if the total pre-output current is greater than the preset current, the first charging pile 1 and the second charging pile 9 need to be simultaneously current-limited so that the total pre-output current is less than or equal to the preset current. Among them, the second charging pile 9 needs to be connected to the electric vehicle one by one, and the number of electric vehicles is less than or equal to the number of second charging piles 9. For example, in the m1th electric vehicle N m1 When the second charging pile 9 is connected, all the electric vehicles N except the m1th electric vehicle can be charged. m1 Other than the mnth electric vehicle N kn Connect to a second charging post 9 that is not connected to the electric vehicle.

[0083] Furthermore, the load management module is also used to:

[0084] When one or some first charging piles communicate abnormally with the load management module, a new preset current is determined according to the preset current and the number of first charging piles that communicate abnormally with the load management module, and the output current of the working charging pile is controlled according to the new preset current.

[0085] Specifically, if one or some first charging piles have abnormal communication with the load management module, and the first charging piles with abnormal communication supply power to the electric vehicle according to the minimum output current, the load management module can generate a new preset current by subtracting the minimum output current and the number of first charging piles with abnormal communication from the preset current. For example, if the number of first charging piles with abnormal communication is 2, the new preset current = preset current - minimum output current * 2. At this time, the load management module can control the output current of each working charging pile supplying power to the electric vehicle according to the new preset current and the re-determined total preset output current.

[0086] The embodiment of the present invention provides a charging load management method. Figure 5 is a flow chart of a charging load management method provided according to an embodiment of the present invention, with reference to Figure 5 , the charging load management method includes:

[0087] S110: Acquire the output current of the first charging pile in working state in real time.

[0088] S120, when at least one first charging pile is newly added and connected to the electric vehicle, determining the total pre-output current of the first charging pile according to the pre-output current of the newly added first charging pile connected to the electric vehicle and the output current of the first charging pile in a working state;

[0089] S130, controlling the output current of each working charging pile for supplying power to the electric vehicle according to the pre-output total current and the preset current; wherein the working charging pile includes a first charging pile in a working state and a newly added first charging pile connected to the electric vehicle.

[0090] The charging load management method corresponding to the charging load management system provided in the embodiment of the present invention obtains the output current of the first charging pile in a working state in real time, and when at least one first charging pile is newly added and connected to the electric vehicle, determines the pre-output total current of the first charging pile according to the pre-output current of the newly added first charging pile connected to the electric vehicle and the output current of the first charging pile in a working state, and controls the output current of each working charging pile to power the electric vehicle according to the pre-output total current and the preset current, thereby realizing overall control of the output currents of multiple first charging piles through the load management module, avoiding the sum of the output currents of each first charging pile exceeding the maximum current allowed to flow through the distribution equipment connected to the power grid, thereby avoiding damage to the distribution equipment connected to the power grid, and ensuring that the power grid can continuously and stably supply power to the electric vehicle through the first charging pile.

[0091] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0092] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A charging load management system, characterized in that: include: A plurality of first charging piles and a load management module; The power grid is connected to the first end of each of the first charging piles, the second end of the first charging pile is connected to the electric vehicle, and the power grid supplies power to the electric vehicle through the first charging pile; the first end of the load management module is connected to the third end of each of the first charging piles, and the load management module is used to obtain the output current of the first charging piles in a working state in real time, and when at least one new first charging pile is connected to the electric vehicle, the load management module determines the pre-output total current of the first charging pile according to the pre-output current of the newly added first charging pile connected to the electric vehicle and the output current of the first charging pile in a working state, and controls the output current of each working charging pile to supply power to the electric vehicle according to the pre-output total current and the preset current; wherein the working charging piles include the first charging piles in a working state and the newly added first charging piles connected to the electric vehicle.

2. The charging load management system according to claim 1, characterized in that: The load management module is used to: Comparing the pre-output total current with the preset current; If the pre-output total current is less than or equal to the preset current, controlling the newly added first charging pile connected to the electric vehicle to supply power to the electric vehicle according to the pre-output current; If the pre-output total current is greater than the preset current, current limiting processing is performed on the working charging pile according to the preset current.

3. The charging load management system according to claim 2, characterized in that: The load management module is used to: If the total pre-output current is greater than the preset current, the preset current is divided by the number of the working charging piles to determine the current-limited output current of each of the working charging piles.

4. The charging load management system according to claim 2, characterized in that: The load management module is used to: If the total pre-output current is greater than the preset current, the output current of each working charging pile is determined according to the preset current, the pre-output current of the newly added first charging pile connected to the electric vehicle, and the output current of each first charging pile in working state.

5. The charging load management system according to claim 1, characterized in that: Also includes: Detection module; The detection module is arranged at the output port of the power grid, the first end of the detection module is connected to the second end of the load management module, and the detection module is used to collect the power supply current of the output port of the power grid in real time and transmit the power supply current to the load management module; The load management module is used to determine the output current of each of the working charging piles according to the difference between the power supply current and the preset current when the power supply current is greater than the preset current.

6. The charging load management system according to claim 1, characterized in that: Also includes: Scheduling module and transmission module; The scheduling module is connected to the third end of the load management module through the transmission module, and the scheduling module and the load management module exchange information through the transmission module.

7. The charging load management system according to claim 6, characterized in that: The scheduling module is used to send the first charging pile power supply control information to the load management module to remotely adjust the output current of any of the first charging piles.

8. The charging load management system according to claim 1, characterized in that: Also includes: at least one standby load management module and a plurality of second charging piles; The power grid is connected to the first end of each second charging pile, the second end of the second charging pile is connected to the electric vehicle, and the power grid supplies power to the electric vehicle through the second charging pile; the first end of the standby load management module is connected to the third end of each second charging pile, and the second end of the standby load management module is connected to the fourth end of the load management module; The standby load management module is used to collect the working status information of each second charging pile in real time, and transmit the working status information of each second charging pile to the load management module; The load management module is used to receive the working status information of each second charging pile, and send the second charging pile power supply control information to the standby load management module according to the working status information of each second charging pile, the total pre-output current and the preset current of the plurality of first charging piles; The standby load management module is used to control the working state of each of the second charging piles according to the power supply control information of the second charging piles.

9. The charging load management system according to claim 1, characterized in that: The load management module is also used for: When one or some of the first charging piles communicate abnormally with the load management module, a new preset current is determined according to the preset current and the number of the first charging piles that communicate abnormally with the load management module, and the output current of the working charging pile is controlled according to the new preset current.

10. A charging load management method, characterized in that: include: Acquire the output current of the first charging pile in working state in real time; When at least one newly added first charging pile is connected to the electric vehicle, the total pre-output current of the first charging pile is determined according to the pre-output current of the newly added first charging pile connected to the electric vehicle and the output current of the first charging pile in working state; The output current of each working charging pile for supplying power to the electric vehicle is controlled according to the pre-output total current and the preset current; wherein the working charging pile includes the first charging pile in a working state and the newly added first charging pile connected to the electric vehicle.

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