Charging system, charging control method and device

Abstract

The application provides a charging system, a charging control method and a device, wherein the charging system comprises M power modules, N charging interfaces, a first switch unit, a second switch unit, a third switch unit and a control unit. The input end of the M power modules is used for connecting a preset power supply. The positive and negative output ends of two adjacent power modules are connected with the first switch unit. The positive output ends of two adjacent power modules are connected with the second switch unit to form a first positive power line of the M power modules. The negative output ends of two adjacent power modules are connected to form a negative power line of the M power modules. The first positive power line is connected with the positive power supply end of the N charging interfaces. The negative power line is connected with the negative power supply end of the N charging interfaces. The negative output ends of the first power module to the Mth power module are connected with the negative power line through the third switch unit. The power modules are connected in series and parallel by controlling the switches to meet the charging requirements of different charging vehicles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging control, in particular to a charging system, a charging control method and device. BACKGROUND

[0002] With the rapid development of new energy vehicles, charging piles as basic supporting facilities are also constantly upgraded and improved. In order to meet the charging needs of new energy vehicles of different manufacturers, different charging pile manufacturers have successively launched charging piles of various voltage levels.

[0003] At present, with the user's requirement for charging speed, the demand for higher power charging is becoming more and more mainstream. The highest voltage of the current market passenger car is 800Vdc, and the highest voltage of the bus or commercial vehicle has reached 900Vdc. With the further development of new energy vehicles, 1000Vdc-1500Vdc or higher voltage level new energy vehicles may become the mainstream of the market.

[0004] However, limited by the current semiconductor devices and cost, the voltage level of the charging module is only 1000Vdc at most, thereby forming an obstacle to the development of electric vehicles. SUMMARY

[0005] Therefore, the embodiments of the present application provide a charging system, a charging control method and device to meet the charging needs of different charging vehicles by controlling the switch to connect the power modules in series and parallel.

[0006] In a first aspect, the embodiments of the present application provide a charging system, comprising: M power modules, N charging interfaces, a first switch unit, a second switch unit, a third switch unit, a control unit; M and N are integers greater than or equal to 2;

[0007] The input end of the M power modules is used to connect a preset power supply, wherein the positive and negative output ends of adjacent two power modules are connected with the first switch unit, the positive output ends of the adjacent two power modules are connected with the second switch unit to form a first positive power line of the M power modules, and the negative output ends of the adjacent two power modules are connected to form a negative power line of the M power modules;

[0008] The first positive power line and the positive power supply end of the N charging interfaces are connected, the negative power line and the negative power supply end of the N charging interfaces are connected, and the negative output ends of the first power module to the M-1 power module are connected with the negative power line through the third switch unit;

[0009] The first switch unit, the second switch unit and the third switch unit are connected with the control unit, so that the corresponding power module in the M power modules is connected in series and / or parallel by controlling the first switch unit, the second switch unit and the third switch unit to be closed or opened, and the corresponding power module after being connected in series and / or parallel is charged through the corresponding charging interface.

[0010] In an optional embodiment, the charging system further comprises a fourth switch unit, the fourth switch unit is connected between the positive output terminals of two adjacent power modules among the first power module to the M-1th power module, so as to form a second positive power line of the first power module to the M-1th power module, and the second positive power line is connected with the positive power supply end of the N charging interfaces.

[0011] In an optional embodiment, the charging system further comprises a fifth switch unit, M-2 connection points on the first positive power line are connected with the corresponding connection points of the second positive power line through the fifth switch unit respectively, the M-2 connection points are the connection points of the positive output terminals of M-2 power modules among the M power modules on the first positive power line, and the M-2 power modules comprise the second power module to the M-1th power module.

[0012] In an optional embodiment, the charging system further comprises a sixth switch unit, the positive output terminals of the second power module to the Mth power module are connected with the first positive power line through the sixth switch unit respectively.

[0013] In an optional embodiment, the charging system further comprises N seventh switch units and N eighth switch units, the first positive power line is connected with the positive power supply end of the N charging interfaces through the N seventh switch units, and the negative power line is connected with the negative power supply end of the N charging interfaces through the N eighth switch units.

[0014] In a second aspect, the embodiments of the present application further provide a charging control method, which is applied to the control unit in any charging system of the first aspect, and the method comprises the following steps:

[0015] obtaining the charging demand parameter of at least one to-be-charged device connected with at least one charging interface;

[0016] determining the switch control signal corresponding to each to-be-charged device according to the charging demand parameter of each to-be-charged device;

[0017] controlling the first switch unit, the second switch unit and the third switch unit to be closed or opened according to the switch control signal corresponding to each to-be-charged device, so that the corresponding power module in the M power modules is connected in series and / or parallel.

[0018] The corresponding power module after the series-parallel connection controls the charging of each device to be charged through the charging interface corresponding to each device to be charged.

[0019] In an optional embodiment, the charging demand parameter includes a charging demand voltage and a charging demand power; and the determination of the switch control signal corresponding to each device to be charged according to the charging demand parameter of each device to be charged includes:

[0020] determination of the switch state of the first switch unit, the second switch unit and the third switch unit according to the charging demand voltage and the charging demand power of each device to be charged;

[0021] generation of the switch control signal corresponding to each device to be charged according to the switch state.

[0022] In an optional embodiment, the number of the at least one charging interface is greater than or equal to 2; and the determination of the switch control signal corresponding to each device to be charged according to the charging demand parameter of each device to be charged includes:

[0023] determination of whether there is a charging conflict of the at least one device to be charged according to the charging demand parameter of the at least one device to be charged;

[0024] if there is no charging conflict of the at least one device to be charged, determination of the switch control signal corresponding to each device to be charged according to the charging demand parameter of each device to be charged;

[0025] if there is a charging conflict of the at least one device to be charged, sequential acquisition of the switch control signal corresponding to the at least one device to be charged according to the charging demand parameter of each device to be charged and the charging priority of each device to be charged.

[0026] In an optional embodiment, the determination of the switch state of the first switch unit, the second switch unit and the third switch unit according to the charging demand voltage and the charging demand power of each device to be charged includes:

[0027] determination of a target switch state table from a plurality of preset switch state tables according to the charging demand voltage of each device to be charged, each switch state table including a plurality of charging power ranges corresponding to a charging voltage range and state information of a switch unit corresponding to each charging power range;

[0028] querying of the target switch state table according to the charging demand power of each device to be charged to obtain the switch state of the target switch unit.

[0029] In a third aspect, the embodiments of the present application further provide a charging control device, comprising:

[0030] an acquisition module, configured to acquire charging demand parameters of at least one to-be-charged device connected to at least one charging interface;

[0031] a determination module, configured to determine a switch control signal corresponding to each to-be-charged device according to the charging demand parameters of the to-be-charged device;

[0032] The determination module is further configured to control the closing or opening of the first switch unit, the second switch unit and the third switch unit according to the switch control signal corresponding to each to-be-charged device, so as to connect the corresponding power module in the M power modules in series and / or in parallel.

[0033] a control module, configured to control the corresponding power module after series-parallel connection to charge each to-be-charged device through the charging interface corresponding to the to-be-charged device.

[0034] The present application provides a charging system, a charging control method and a device, wherein the charging system comprises: M power modules, N charging interfaces, a first switch unit, a second switch unit, a third switch unit, a control unit, the input end of the M power modules is used to connect a preset power supply, the positive and negative output ends of adjacent two power modules are connected with the first switch unit, the positive output ends of adjacent two power modules are connected with the second switch unit, so as to form a first positive power line of the M power modules, the negative output ends of adjacent two power modules are connected, so as to form a negative power line of the M power modules, the first positive power line is connected with the positive power supply end of the N charging interfaces, the negative power line is connected with the negative power supply end of the N charging interfaces, and the negative output ends of the first power module to the M-1th power module are connected with the negative power line through the third switch unit. By controlling the switch, the power modules are connected in series and / or in parallel, so as to meet the charging demand of different charging vehicles.

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0037] Figure 1 The circuit structure of the charging system provided by the embodiments of the present application Figure One ;

[0038] Figure 2 Circuit structure of a charging system provided for an embodiment of the present application Figure Two ;

[0039] Figure 3 Circuit structure of a charging system provided for an embodiment of the present application Figure Three ;

[0040] Figure 4 Circuit structure of a charging system provided for an embodiment of the present application Figure Four ;

[0041] Figure 5 Circuit structure of a charging system provided for an embodiment of the present application Figure Five ;

[0042] Figure 6 Circuit structure of a charging system provided for an embodiment of the present application

[0043] Figure 7 Flow of a charging control method provided for an embodiment of the present application Figure One ;

[0044] Figure 8 Flow of a charging control method provided for an embodiment of the present application Figure Two ;

[0045] Figure 9 Flow of a charging control method provided for an embodiment of the present application Figure Three ;

[0046] Figure 10 Circuit structure of a charging system provided for an embodiment of the present application Figure Six ;

[0047] Figure 11 Flow of a charging control method provided for an embodiment of the present application Figure Four ;

[0048] Figure 12 Flow of a charging control method provided for an embodiment of the present application Figure Five ;

[0049] Figure 13 Circuit structure of a charging system provided for an embodiment of the present application

[0050] Figure 14 Structure of a charging control device provided for an embodiment of the present application

[0051] Reference signs:

[0052] 01 - power module; 02 - charging interface; 03 - first switch unit; 04 - second switch unit; 05 - third switch unit; 06 - control unit; 07 - fourth switch unit; 08 - fifth switch unit; 09 - first positive power line connection point; 10 - second positive power line connection point; 11 - sixth switch unit; 12 - seventh switch unit; 13 - eighth switch unit. DETAILED DESCRIPTION

[0053] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application and are not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0054] At present, from the voltage level, the current mainstream charging pile product covers the voltage range of 200Vdc-500Vdc, 200Vdc-750Vdc, and 200Vdc-1000Vdc. From the power level, the current mainstream single pile power level mainly has 30kW, 40kW, 80kW, 120kW, 180kW, 240kW, 300kW, 320kW, 360kW, 400kW, 480kW, etc. With the user's requirement for charging speed, the demand for larger power charging is becoming more and more mainstream. Since the power of electric vehicle charging is usually large, low voltage necessarily requires larger current, thereby putting forward higher challenge to the heat dissipation of the charging gun, and the efficiency of the line and the converter will be greatly reduced, so high-voltage charging will continue to be the direction of constantly pursuing high-power charging development.

[0055] Currently, the highest voltage for passenger vehicles on the market is 800Vdc, while buses and commercial vehicles have reached 900Vdc. With the further development of new energy vehicles, 1000Vdc-1500Vdc or even higher voltage levels may become the mainstream. However, due to current limitations in semiconductor devices and costs, the highest voltage level for charging modules is only 1000Vdc, which hinders the development of electric vehicles. Meanwhile, energy conservation and emission reduction, and lowering the operating costs of equipment, are ongoing pursuits within the industry. Therefore, researching a small, low-cost charging module that can adapt to various voltage levels and can schedule the smallest unit according to power demand has become a key research focus.

[0056] Based on this, this application provides a charging system that, based on the connection relationship of switches and control logic, controls power modules to be connected in series and / or in parallel to achieve voltage range adjustment and power distribution control, realizing ultra-wide voltage range and high-power charging with a single gun. Furthermore, the system uses fewer switches, occupies less space, and has lower cost, thereby meeting the charging needs of different charging vehicles while reducing charging losses.

[0057] The following is combined Figures 1-6 The circuit structure of the charging system provided in this application is described.

[0058] Figure 1 Circuit structure diagram of the charging system provided in the embodiments of this application Figure One ,like Figure 1 As shown, the charging system includes: M power modules 01, N charging interfaces 02, a first switch unit 03, a second switch unit 04, a third switch unit 05, and a control unit 06, where M and N are integers greater than or equal to 2.

[0059] Among them, M power modules are denoted as P1 to Pm, where m equals M. The input terminals of the M power modules 01 are used to connect to a preset power supply. A first switching unit 03 is connected between the positive and negative output terminals of two adjacent power modules 01. For example, the first switching unit 03 is connected between the negative output terminal of the first power module 01 and the positive output terminal of the second power module 01, and between the negative output terminal of the second power module 01 and the positive output terminal of the third power module 01. The other power modules 01 are connected in the same way.

[0060] A second switching unit 04 is connected between the positive output terminals of two adjacent power modules 01 to form the first positive power line of M power modules 01. The negative output terminals of two adjacent power modules 01 are connected to form the negative power line of M power modules 01.

[0061] Wherein, the N charging interfaces are denoted as A1 to An, n is equal to N, the first positive power line is connected with the positive power supply end of the N charging interfaces 02, the negative power line is connected with the negative power supply end of the N charging interfaces 02, and the negative output end of the first power module 01 to the M-1th power module 01 is connected with the negative power line through the third switch unit 05 respectively.

[0062] The first switch unit 03, the second switch unit 04 and the third switch unit 05 are connected with the control unit 06, so as to realize the series connection and / or parallel connection of the corresponding power modules in the M power modules 01 by controlling the closing or opening of the first switch unit 03, the second switch unit 04 and the third switch unit 05, so that the corresponding power modules after series connection and / or parallel connection are charged through the corresponding charging interfaces, wherein the control unit 06 can be a microcontroller unit (MCU) for example.

[0063] Wherein, the first switch unit 03 is a series switching switch, by controlling the closing or opening of the first switch unit 03, different power modules 01 can be combined in series, so as to realize the charging demand of wide voltage and large power, the second switch unit 04 is a parallel switching switch, by controlling the closing or opening of the second switch unit 04, different power modules 01 can be combined in parallel, so as to realize the charging demand of low voltage, and the third switch unit 05 is a negative electrode gating switch, by controlling the closing or opening of the third switch unit 05, different power modules 01 can be selected to be connected in series and / or parallel.

[0064] It is worth noting that the N charging interfaces 02 are respectively used for charging devices, the charging devices can be charging guns for example, if the vehicle to be charged needs to be charged, the vehicle to be charged can be connected with the charging device, wherein the maximum charging voltage that can be output by the M power modules 01 can be the same, for example V0, when the control unit 06 obtains the charging demand of the vehicle to be charged through the charging interface 02, the control unit 06 can control the closing or opening of the first switch unit 03, the second switch unit 04 and the third switch unit 05 according to the charging demand of the vehicle, so as to make different power modules 01 be combined in series or in parallel to charge the vehicle to be charged, so as to adapt to the charging demand of different vehicles to be charged, wherein the charging demand can include the charging voltage demand and the charging power demand.

[0065] For example, the A2 charging interface is connected with a charging gun, the charging gun is connected with a vehicle to be charged, if P1, P2 and P3 are required to be connected in series to charge the vehicle to be charged, the control unit 06 can control the first switch unit 03 between the positive output end of P1 and the positive output end of P2 to be closed, the first switch unit 03 between the negative output end of P2 and the positive output end of P3 to be closed, the second switch unit 04 between the positive output end of P1 and the positive output end of P2 to be closed, and the third switch unit 05 between the negative output end of P3 and the negative power line to be closed.

[0066] For example, the A2 charging interface is connected with a charging gun, the charging gun is connected with a vehicle to be charged, if P1, P2 and P3 are required to be connected in series to charge the vehicle to be charged, the control unit 06 can control the first switch unit 03 between the positive output end of P1 and the positive output end of P2 to be closed, the first switch unit 03 between the negative output end of P2 and the positive output end of P3 to be closed, the second switch unit 04 between the positive output end of P1 and the positive output end of P2 to be closed, and the third switch unit 05 between the negative output end of P3 and the negative power line to be closed.

[0067] In an optional embodiment, the number of the first switch unit 03, the second switch unit 04 and the third switch unit 05 is M-1, one first switch unit 03 is connected between the positive output end and the negative output end of adjacent two power modules 01, one second switch unit 04 is connected between the positive output ends of adjacent two power modules 01, and the negative output ends of the first power module 01 to the M-1th power module 01 are connected to the negative power line through one third switch unit 05 respectively.

[0068] In some embodiments, the first switch unit 03, the second switch unit 04 and the third switch unit 05 can be mechanical switches or semiconductor switches, the mechanical switches include relays or contactors, and the semiconductor switches are full-controlled semiconductor switching devices, and the specific form of the switch unit is not particularly limited in the embodiment.

[0069] In the embodiment, the control unit 06 can also be connected with the M power modules 01 to control the corresponding power modules connected in series and / or parallel to charge the vehicle to be charged through the corresponding charging interface 02.

[0070] In the charging system of the embodiment, different power modules are called to be connected in series and / or parallel by controlling the closing and opening of the switches, so that the charging voltage and the charging power of different charging vehicles are met, the charging vehicle obtains the required charging voltage and charging power, the number of switches used is small, the system occupies less space, the cost is lower, and the charging loss is reduced.

[0071] Figure 2 Circuit structure of the charging system provided by the embodiment Figure Two For example, the A2 charging interface is connected with a charging gun, the charging gun is connected with a vehicle to be charged, if P1, P2 and P3 are required to be connected in series to charge the vehicle to be charged, the control unit 06 can control the first switch unit 03 between the positive output end of P1 and the positive output end of P2 to be closed, the first switch unit 03 between the negative output end of P2 and the positive output end of P3 to be closed, the second switch unit 04 between the positive output end of P1 and the positive output end of P2 to be closed, and the third switch unit 05 between the negative output end of P3 and the negative power line to be closed. Figure 2As shown, the charging system also includes: a fourth switching unit 07, which is connected between the positive output terminals of two adjacent power modules 01 from the first power module 01 to the (M-1)th power module 01 to form a second positive power line from the first power module 01 to the (M-1)th power module 01. The second positive power line is connected to the positive power supply terminals of N charging interfaces 02.

[0072] The fourth switch unit 07 is connected to the control unit 06. When two charging interfaces 02 are used to charge two vehicles to be charged respectively, if both charging interfaces need to use positive power lines to call different power modules 01 for charging, in order to charge the two vehicles to be charged at the same time, the two charging interfaces 02 can be controlled to use the first positive power line and the second positive power line respectively to call different power modules 01 for charging the vehicles to be charged, so that the two vehicles can be charged at the same time.

[0073] For example, charging ports A2 and A3 are each connected to a charging gun, and each charging gun is connected to a vehicle to be charged. Charging port A3 requires P2 and P3 to be connected in series to charge the vehicle to be charged. In this case, the first switch unit 03 between the negative output terminal of P2 and the positive output terminal of P3 is closed, the second switch unit 04 between the positive output terminal of P2 and the positive output terminal of P3 on the first positive power line is closed, and the third switch unit 05 between the negative output terminal of P3 and the negative power line is closed. Charging port A2 requires P1 to charge the vehicle to be charged. In this case, the second switch unit 04 between the positive output terminal of P1 and the positive output terminal of P2 on the second positive power line is closed, and the third switch unit 05 between the negative output terminal of P1 and the negative power line is closed.

[0074] In an optional implementation, the number of fourth switching units is M-2, where M is greater than 2, and a fourth switching unit 07 is connected between the positive output terminals of two adjacent power modules 01 from the first power module 01 to the (M-1)th power module 01.

[0075] In the charging system of this embodiment, a fourth switching unit is provided between the positive output terminals of two adjacent power modules from the first power module to the (M-1)th power module to form a second positive power line from the first power module to the (M-1)th power module. This ensures that when power modules are simultaneously used for charging via the positive power line, another vehicle to be charged can be charged via the second positive power line without affecting charging via the first positive power line, making charging more flexible.

[0076] Figure 3 Circuit structure diagram of the charging system provided in the embodiments of this application Figure Three ,like Figure 3As shown, the charging system further comprises: a fifth switch unit 08, and M-2 connection points 09 on the first positive power line are connected to the corresponding connection points 10 of the second positive power line through the fifth switch unit 08.

[0077] The M-2 connection points are the connection points 09 of the positive output ends of M-2 power modules 01 in the M power modules on the first positive power line, that is, the intersection of the extension line of the positive output ends of the M-2 power modules 01 and the first positive power line, and the M-2 power modules include the second power module 01 to the M-1 power module 01.

[0078] Among them, the first positive power line includes M-2 connection points 09, one end of the fifth switch unit 08 is connected through the M-2 connection points 09, and the other end of the fifth switch unit 08 is connected to the corresponding connection points 10 of the second positive power line, that is, the fifth switch unit is arranged between the M-2 connection points 09 on the first positive power line and the M-2 connection points 10 on the second positive power line.

[0079] It is worth noting that when the first positive power line and the second positive power line are used to call the power module 01 at the same time, the control unit 06 can also control the fifth switch unit between the connection points on the first positive power line and the corresponding connection points on the second positive power line to be disconnected, so as to avoid mis-calling and calling failure, so that the two charging interfaces 02 can accurately control the different power modules 01 to be called through the first positive power line and the second positive power line respectively.

[0080] Similarly, referring to the above example, the A2 and A3 charging interfaces are respectively connected with one charging gun, and each charging gun is connected with one vehicle to be charged, the A3 charging interface needs P2 and P3 to be connected in series to charge the vehicle to be charged, and the A2 charging interface needs P1 to charge the vehicle to be charged. In addition, the fifth switch unit 08 between the connection point of P2 on the first positive power line and the corresponding connection point on the second positive power line can be controlled to be disconnected, so as to improve the success rate of calling the power module, and avoid mis-calling the power module and calling the power module failure.

[0081] In an optional embodiment, the number of the fifth switch unit 08 is M-2, and the M-2 connection points 09 in the first positive power line are connected to the corresponding connection points 10 of the second positive power line through one fifth switch unit 08.

[0082] Among them, the fifth switch unit 08 is also connected with the control unit 06, so as to be closed or disconnected under the control of the control unit 06.

[0083] Figure 4 The structure of the charging system provided by the embodiment of the application Figure Four As shown in FIG. 1, Figure 4As shown, the charging system further comprises: a sixth switch unit 11, and the positive output end of the second power module 01 to the Mth power module 01 is connected to the first positive power line through the sixth switch unit 11.

[0084] Wherein, by controlling the sixth switch unit 11 to be closed or opened, multiple power modules 01 can be called in parallel to charge, for example, A3 charging interface needs P1, P3 in parallel to charge the vehicle to be charged, then control the second switch unit 04 between the positive output end of P1 and the positive output end of P2 to be closed, the second switch unit 04 between the positive output end of P2 and the positive output end of P3 to be closed, the third switch unit 05 between the negative output end of P3 and the negative power line to be closed, the sixth switch unit 11 between the positive output end of P2 and the first positive power line to be opened, and the sixth switch unit 11 between the positive output end of P3 and the first positive power line to be opened, so that when calling non-adjacent power modules 01, the sixth switch unit 11 corresponding to the power module 01 between the non-adjacent power modules 01 can be controlled to be opened, and the sixth switch unit 11 corresponding to the non-adjacent power module 01 is closed, so as to realize the successful calling of the power module.

[0085] For example, when calling adjacent power modules 01, the sixth switch unit 11 corresponding to the adjacent power modules 01 can be controlled to be closed, so as to realize the successful calling of the power module.

[0086] In an optional embodiment, the number of sixth switch units 11 is M-1, and the positive output end of the second power module 01 to the Mth power module 01 is connected to the first positive power line through one sixth switch unit 11.

[0087] Figure 5 Circuit structure of the charging system provided by the embodiment of the application Figure Five As shown in the figure, Figure 5 The charging system further comprises: N seventh switch units 12 and N eighth switch units 13, the first positive power line is connected to the positive power supply end in the N charging interfaces 02 through the N seventh switch units 12, and the negative power line is connected to the negative power supply end in the N charging interfaces 02 through the N eighth switch units 13.

[0088] Wherein, the charging interface 02 comprises a positive power supply end and a negative power supply end, which are used for connecting the positive power supply end and the negative power supply end of the charging device, the positive power supply end of the N charging interfaces 02 is connected to the first positive power line through the N seventh switch units 12, and the negative power supply end of the N charging interfaces 02 is connected to the negative power line through the N eighth switch units 13.

[0089] The charging interface 02 is connected with the corresponding charging device. If the vehicle to be charged needs to be charged, the vehicle to be charged and the charging device are connected, and the control unit 06 controls the seventh switch unit 12 connected to the positive power supply end of the charging interface 02 to be closed and the eighth switch unit 13 connected to the negative power supply end to be closed. The seventh switch unit 12 and the eighth switch unit 13 are terminal selection switches used to distribute charging terminals, that is, charging devices used for charging vehicles.

[0090] For example, the A3 charging interface needs P1 and P3 to be connected in parallel to charge the vehicle to be charged. Then, the seventh switch unit 12 between the positive power supply end of A3 and the first positive power line is closed, the eighth switch unit 13 between the negative power supply end of A3 and the negative power line is closed, the second switch unit 04 between the positive output end of P1 and the positive output end of P2 is closed, the second switch unit 04 between the positive output end of P2 and the positive output end of P3 is closed, and the third switch unit 05 between the negative output end of P3 and the negative power line is closed to connect P1 and P3 in parallel to charge the vehicle to be charged.

[0091] The second positive power line is connected to the positive power supply end in the N seventh switch units 12 and the N charging interfaces 02.

[0092] In the charging system of the embodiment, when there is a charging demand at the charging interface, the seventh switch unit and the eighth switch unit are closed to control the charging through the charging interface, so that all the seventh switch units and the eighth switch units are not closed to reduce the charging loss.

[0093] In some embodiments, the fourth switch unit 07, the fifth switch unit 08, the sixth switch unit 11, the seventh switch unit 12, and the eighth switch unit 13 can be mechanical switches or semiconductor switches. The mechanical switch includes a relay or a contactor, and the semiconductor switch is a fully controlled semiconductor switching device. The specific form of the switch unit is not particularly limited in the embodiment.

[0094] The embodiment of the application also provides a charging pile, which comprises a charging system and at least one charging device. At least one charging interface of the charging system is used to connect at least one charging device.

[0095] The charging device can be a charging gun. One charging interface can be connected with one charging device, and the charging system can be connected with at least one charging device through at least one charging interface.

[0096] It is worth noting that the commonly used charging piles at present are mostly in the form of single gun or double gun. Here, the double gun is taken as an example for description. Figure 6 A specific circuit structure schematic diagram of the charging system provided by the embodiment of the application is as follows: Figure 6As shown, the system has M power modules, 2 charging interfaces (A1 and A2), 2 charging interfaces are respectively connected with a charging gun, the control unit is MCU, a first switch unit 03 is connected between the positive and negative output terminals of adjacent two power modules 01, a second switch unit 04 is connected between the positive output terminals of adjacent two power modules 01, to form a first positive power line of the M power modules 01, and the negative output terminals of adjacent two power modules 01 are connected to form a negative power line of the M power modules 01.

[0097] The negative output terminals of the first power module 01 to the M-1th power module 01 are respectively connected to the negative power line through a third switch unit 05, the positive output terminals of the second power module 01 to the Mth power module 01 are respectively connected to the first positive power line through a sixth switch unit 11, the positive power supply terminals of A1 and A2 are respectively connected to the first positive power line through a seventh switch unit 12, and the negative power supply terminals of A1 and A2 are respectively connected to the negative power line through an eighth switch unit 13.

[0098] The first switch unit 03, the second switch unit 04, the third switch unit 05, the sixth switch unit 11, the seventh switch unit 12 and the eighth switch unit 13 are all connected to the control unit 06, so as to be closed or opened under the control of the control unit 06.

[0099] The MCU can control the power modules to be connected in series and / or parallel according to the charging demand of the to-be-charged vehicle connected with the charging interface, so as to realize the control of voltage range adjustment and power distribution, realize super-wide voltage range and single-gun high-power charging, and compared with the existing scheme, the number of switches used is less, the system occupies less space, and the cost is lower, so that the charging demand of different charging vehicles can be met, and the charging loss is reduced.

[0100] On the basis of the above-mentioned embodiments, the following will be combined Figures 7-13 The charging control method provided in the application is described.

[0101] Figure 7 The flowchart of the charging control method provided in the embodiment of the application is shown Figure One The execution subject of the embodiment can be the control unit in the charging system.

[0102] As Figure 7 shown, the method can include:

[0103] S101, acquiring the charging demand parameter of at least one to-be-charged device connected with at least one charging interface.

[0104] The to-be-charged device connected with the charging interface can be understood as a to-be-charged device connected with a charging device connected with the charging interface. The charging interface is used to connect the charging device, for example, a charging gun. The charging device is used to connect the to-be-charged device, for example, a to-be-charged vehicle. If the to-be-charged vehicle needs to be charged, the to-be-charged vehicle and the charging gun are connected.

[0105] In S102, a switch control signal corresponding to each to-be-charged device is determined according to the charging demand parameter of each to-be-charged device.

[0106] In S102, a switch control signal corresponding to each to-be-charged device is determined according to the charging demand parameter of each to-be-charged device. The switch control signal is used to control the closing or opening of the first switch unit, the second switch unit and the third switch unit, so as to connect the corresponding power module in the M power modules in series and / or in parallel. The corresponding power module after series and / or parallel connection charges the to-be-charged device through the charging interface according to the charging demand parameter of each to-be-charged device.

[0107] In S103, the closing or opening of the first switch unit, the second switch unit and the third switch unit is controlled according to the switch control signal corresponding to each to-be-charged device, so as to connect the corresponding power module in the M power modules in series and / or in parallel.

[0108] In S104, the corresponding power module after series and / or parallel connection charges each to-be-charged device through the charging interface corresponding to each to-be-charged device.

[0109] In S103, the closing or opening of the first switch unit, the second switch unit and the third switch unit is controlled according to the switch control signal corresponding to each to-be-charged device, so as to connect the corresponding power module in the M power modules in series and / or in parallel. The corresponding power module after series and / or parallel connection charges each to-be-charged device through the charging interface corresponding to each to-be-charged device according to the charging demand parameter of each to-be-charged device.

[0110] In the charging control method of the embodiment, the calling of the power module and the combination of the switch units are performed according to the charging demand parameter of the to-be-charged device, so that the to-be-charged device can obtain the required charging demand parameter, thereby meeting the charging demand of different to-be-charged devices.

[0111] It is worth noting that the control unit can also determine the target output power of the corresponding power module according to the charging demand parameter, and control the corresponding power module to charge the to-be-charged device through the charging interface according to the target output power.

[0112] Among them, the charging demand parameters include the charging demand power, and the target output power can be the average power of the charging demand power, that is, each corresponding power module charges the device to be charged according to the average power to meet the charging demand power of the device to be charged.

[0113] Figure 8 Flowchart of the charging control method provided in the embodiments of this application Figure Two ,like Figure 8 As shown, in an optional embodiment, step S102, determining the switch control signal corresponding to each device to be charged based on the charging demand parameters of each device to be charged, may include:

[0114] S201. Determine the switching states of the first switching unit, the second switching unit, and the third switching unit based on the charging voltage and charging power requirements of each device to be charged.

[0115] S202. Generate a switch control signal for each device to be charged based on the switch status.

[0116] The charging requirement parameters include the charging requirement voltage and the charging requirement power. Based on the charging requirement voltage and the charging requirement power of each device to be charged, the switching states of the first switching unit, the second switching unit, and the third switching unit can be determined. The switching states include the open state and the closed state.

[0117] Then, based on the switching states of the first, second, and third switching units, a switching control signal is generated for each device to be charged. The switching control signal corresponds to the switching state. For example, if the switching state of the first switching unit is closed, the switching control signal is used to control the first switching unit to close; if the switching state of the first switching unit is open, the switching control signal is used to control the first switching unit to open.

[0118] In the charging control method of this embodiment, the switching states of the first, second, and third switching units are determined according to the charging voltage and charging power requirements of each device to be charged. A switching control signal corresponding to each device to be charged is generated based on the switching states to control the first, second, and third switching units to close or open. Corresponding power modules from the M power modules are connected in series and / or in parallel. The series-parallel connected power modules are then used to charge each device to be charged according to its charging voltage and charging power requirements, through the corresponding charging interface of each device. This satisfies the charging needs of different devices.

[0119] Figure 9 Flowchart of the charging control method provided in the embodiments of this application Figure Three ,like Figure 9As shown, in an optional embodiment, the step S102 of determining the switch control signal corresponding to each of the to-be-charged devices according to the charging demand parameter of each of the to-be-charged devices can include:

[0120] S301, judging whether there is a charging conflict of the at least one to-be-charged device according to the charging demand parameter of the at least one to-be-charged device.

[0121] The number of the at least one charging interface is greater than or equal to 2, and the number of the at least one to-be-charged device is equal to the number of the at least one charging interface, that is, there are more than or equal to 2 to-be-charged devices that need to be charged at the same time.

[0122] According to the charging demand parameter of the at least one to-be-charged device, it can be judged whether there is a charging conflict of the at least one to-be-charged device. The charging conflict can be understood as that the M power modules cannot simultaneously charge each of the to-be-charged devices according to the charging demand parameter of each of the to-be-charged devices.

[0123] In an optional embodiment, the control unit obtains a total charging demand parameter according to the charging demand parameter of the at least one to-be-charged device. If the total charging demand parameter is greater than the maximum charging parameter provided by the M power modules, it is determined that there is a charging conflict of the at least one to-be-charged device. If the total charging demand parameter is less than or equal to the maximum charging parameter provided by the M power modules, it is determined that there is no charging conflict of the at least one to-be-charged device.

[0124] The charging demand parameter includes the charging demand voltage and the charging demand power, and the maximum charging parameter provided by the M power modules includes the maximum charging voltage and the maximum charging power. For example, the highest charging voltage that can be output by each power module is V0, and the maximum power that can be output is P. The maximum charging voltage provided by the M power modules is M*V0, and the maximum charging power is M*P.

[0125] Taking the charging demand voltage as an example, the total charging demand voltage is calculated according to the charging demand voltage of the at least one to-be-charged device. The total charging demand voltage is the sum of the charging demand voltages of the at least one to-be-charged device. Then, the total charging demand voltage is compared with the maximum charging voltage provided by the M power modules. If the total charging demand voltage is greater than the maximum charging voltage, there is a charging conflict of the at least one to-be-charged device, that is, it is impossible to simultaneously charge each of the to-be-charged devices according to the charging demand voltage of each of the to-be-charged devices. If the total charging demand voltage is less than or equal to the maximum charging voltage, there is no charging conflict of the at least one to-be-charged device, that is, it is possible to simultaneously charge each of the to-be-charged devices according to the charging demand voltage of each of the to-be-charged devices.

[0126] S302. If at least one device to be charged does not have a charging conflict, then determine the corresponding switch control signal for each device to be charged based on the charging demand parameters of each device.

[0127] If at least one device to be charged does not have a charging conflict, then the switch control signal corresponding to each device to be charged is determined according to the charging demand parameters of each device to be charged. Specifically, the switch states of the first switch unit, the second switch unit, and the third switch unit can be obtained according to the charging demand parameters of each device to be charged, and then the switch control signal corresponding to each device to be charged is generated according to the switch states.

[0128] The switch control signal is used to control the first switch unit, the second switch unit, and the third switch unit to close or open, that is, to allocate the power module to be called to the device to be charged.

[0129] The process of acquiring switch control signals includes the following situations:

[0130] The first method involves the highest output charging voltage of each power module being V0. If the charging voltage required by the device to be charged is less than or equal to V0, the power modules are connected in parallel. The number of power modules to be called is then determined based on the charging requirements of the device to be charged. Let i0 = Pn / P, where P is the maximum output power of each power module and Pn is the charging power required by the device to be charged. If i0 is an integer, the number of power modules to be called is i = i0. If i0 is not an integer, the number of power modules to be called is i = the integer part of i0 + 1.

[0131] It is worth noting that when assigning power modules to devices to be charged, priority should be given to starting with the power module that is closest to the charging gun corresponding to the device. Figure 10 Circuit structure diagram of the charging system provided in the embodiments of this application Figure Six ,like Figure 10 As shown, the first switch unit includes: S0_00, S0_10…S0_(m-1)0; the second switch unit includes: S1_00, S1_11…S1_(m-1)1; the third switch unit includes: S7_1, S7_2, S7_3…S7_m; the fourth switch unit includes: S1_0(n-2), S1_1(n-3); the fifth switch unit includes: S2_02, S2_12; the sixth switch unit includes: S2_01, S2_11…S2_(m-1)1; the seventh switch unit includes: S8_11, S8_12, S8_13…S8_1n; and the eighth switch unit includes: S8_21, S8_22, S8_23…S8_2n.

[0132] For example, the charging gun of the A1 charging interface is closest to the P1, and the first power module P1 is called first. Correspondingly, to successfully call the corresponding power module, the switch states of S2_01-S2_(i-1)1, S1_00-S1_(i-1)1, S7_1-S7_i-1, S8_11 and S8_12 are determined to be in the closed state. For another example, the charging gun of the A2 charging interface is closest to the Pm, and the mth power module Pm is called first. Correspondingly, to successfully call the corresponding power module, the switch states of S2_(m-1)1-S2_(m-i)1, S1_(m-1)1-S1_(m-i)1, S7_m-1-S7_(m-i), S8_12 and S8_22 are determined to be in the closed state.

[0133] Secondly, if the charging demand voltage of the to-be-charged device is greater than V0, the calling mode of the power module is module series, j0=charging demand voltage / V0, if j0 is an integer, the number j of the power module to be called is j0, if j0 is not an integer, the number j of the power module to be called is j=integer bit of j0+1, and in the case of charging demand power Pn<j*P, the switch states of j-1 first switch units between the positive and negative power supply ends of the i power modules in series are determined to be in the closed state.

[0134] Taking the A1 and A2 charging interfaces as examples, for the to-be-charged device connected to A1, the first power module P1 is called first, and the switch states of S0_00-S0_(j-1)0, S7_j, and S8_11 and S8_12 are in the closed state. For the to-be-charged device connected to A2, the mth module is called first, and the switch states of S0_(m-1)0-S0_(m-j+1)0, S2_(m-j)1, S8_12, S8_22 are determined to be in the closed state.

[0135] Thirdly, on the basis of the second case, if the charging demand power Pn>j*P, the module group number k0=Pn / j*P, if the module group number k0 is an integer, the parallel module group number k=k0, if the module group number k0 is not an integer, the parallel module group number k=integer bit of k0+1, and one parallel module group is composed of j power modules in series, thereby the switch states of the first switch unit, the second switch unit and the third switch unit can be obtained to realize the combination and calling of the power module.

[0136] S303, if at least one to-be-charged device has a charging conflict, the switch control signal corresponding to each to-be-charged device is obtained in sequence according to the charging demand parameters of each to-be-charged device and the charging priority of each to-be-charged device.

[0137] The charging priority of the to-be-charged device can be a priority of the to-be-charged device in charging which is set in advance.

[0138] If there is a charging conflict for the at least one to-be-charged device, the to-be-charged device with a high charging priority is preferentially assigned a power module in order of the charging priority from high to low, and then a switch control signal corresponding to the to-be-charged device with a lower charging priority is obtained, that is, the to-be-charged device with the lower charging priority is assigned a power module, and the remaining power modules are sequentially assigned to the to-be-charged device with the lowest charging priority.

[0139] It should be noted that, when the to-be-charged device is assigned a called power module, the calling can be preferentially started from a power module closest to the to-be-charged device corresponding to a charging gun. In addition, for a double-gun system, there are two charging interfaces (A1 and A2), and when there is a charging conflict, the switch control signal corresponding to the to-be-charged device with a high charging priority can be obtained according to the above three cases to complete the calling of the power module, and the remaining power modules can be combined to charge the to-be-charged device with a low charging priority.

[0140] For a multi-gun system, when there is a charging conflict, the switch control signal can be sequentially obtained according to the charging priority from high to low according to the above three cases, and the remaining power modules can be combined to charge the to-be-charged device with the lowest charging priority.

[0141] In the charging control method of the embodiment, when the at least one to-be-charged device is simultaneously charged, it is determined whether there is a charging conflict, and if there is a charging conflict, the switch control signal corresponding to the at least one to-be-charged device is sequentially obtained according to the charging priority to charge the to-be-charged device, thereby meeting the demand of simultaneously charging different to-be-charged devices and improving the flexibility of charging control.

[0142] Figure 11 Flowchart of the charging control method provided by the embodiment Figure Four As shown in Figure 10 In an optional embodiment, step S201, according to the charging demand voltage and the charging demand power of each to-be-charged device, the switch state of the first switch unit, the second switch unit and the third switch unit is determined, which can include:

[0143] S401, according to the charging demand voltage of each to-be-charged device, a target switch state table is determined from a plurality of preset switch state tables.

[0144] S402, according to the charging demand power of each to-be-charged device, the target switch state table is queried to obtain the switch state.

[0145] Each switch state table includes: a plurality of charging power ranges corresponding to a charging voltage range and state information of a switch unit corresponding to each charging power range, wherein the charging voltage range is any one of M charging voltage ranges of M power modules, for example, the maximum charging voltage that each power module can output is V0, and the maximum power is P, then there are M charging voltage ranges, which are 0-V0, V0-2V0, 2V0-3V0…(M-1)*V0-M*V0, and one charging voltage range corresponds to M charging power ranges, and the M charging power ranges are 0-P, P-2P, 2P-3P…(M-1)*P-M*P.

[0146] The state information of the switch unit corresponding to each charging power range is used to indicate the switch state of the switch unit, including the closed state and the open state, and the switch unit corresponding to each charging power range includes a first switch unit, a second switch unit and a third switch unit, that is, if the charging demand power of the to-be-charged device is within the charging power range, the switch state of the first switch unit, the second switch unit and the third switch unit can be determined according to the state information of the switch unit corresponding to the charging power range.

[0147] According to the charging demand voltage of each to-be-charged device, the switch state table corresponding to the charging voltage range in which the charging demand voltage is located is determined as a target switch state table from the plurality of preset switch state tables, and then according to the charging demand power of each to-be-charged device, the target switch state table is queried to obtain the switch state of the first switch unit, the second switch unit and the third switch unit corresponding to the charging power range in which the charging demand power is located.

[0148] It is worth noting that in the case that there is no charging conflict among the at least one to-be-charged device, the corresponding switch state table can be queried to obtain the switch state corresponding to each to-be-charged device, and in the case that there is a charging conflict among the at least one to-be-charged device, the corresponding switch state table can be queried in turn according to the charging priority from high to low to obtain the switch state corresponding to the at least one to-be-charged device, so as to realize the allocation and calling of the power module, and for the to-be-charged device with the lowest charging priority, the corresponding switch state table can be queried according to the maximum power of the remaining power module after the allocation to obtain the switch state corresponding to the to-be-charged device with the lowest charging priority.

[0149] In the charging control method of the embodiment, the corresponding switch state table is queried according to the charging demand voltage and the charging demand power of each to-be-charged device to obtain the switch state of the first switch unit, the second switch unit and the third switch unit. The switch state is determined by querying the switch state table, which improves the charging control efficiency.

[0150] The generation process of the plurality of preset switch state tables will be described below.

[0151] Figure 12 Flowchart of the charging control method provided for the embodiments of the present application Figure Five As shown in the figure, in an optional embodiment, before step S401, according to the charging demand voltage of each device to be charged, the method can further include: Figure 12

[0152] S501, obtain M charging voltage ranges and M charging power ranges corresponding to the M power modules.

[0153] For example, the maximum charging voltage that each power module can output is V0, and the maximum power is P, then the M charging voltage ranges are 0-V0, V0-2V0, 2V0-3V0…(M-1)*V0-M*V0, and the M charging power ranges are 0-P, P-2P, 2P-3P…(M-1)*P-M*P.

[0154] S502, according to each charging voltage range, determine the module connection mode corresponding to each charging voltage range.

[0155] The module connection mode includes module parallel connection and module series connection. Compare the voltage included in each charging voltage range with the maximum charging voltage V0 of each power module. If the charging voltage included in the charging voltage range is less than or equal to V0, it is determined that the module connection mode corresponding to the charging voltage range is module parallel connection. If the charging voltage included in the charging voltage range is greater than V0, it is determined that the module connection mode corresponding to the charging voltage range is module series connection.

[0156] For example, the charging voltage included in the charging voltage range 0-V0 is less than or equal to V0, so it is determined that the module connection mode is module parallel connection. The charging voltage included in the charging voltage range V0-2V0 is greater than V0, so it is determined that the module connection mode is module series connection.

[0157] S503, according to the module connection mode and the M charging power ranges, determine the target power module group corresponding to the M charging power ranges.

[0158] If the module connection mode is module parallel connection, according to the M charging power ranges, determine the first module number corresponding to the M charging power ranges, and according to the first module number, determine the target power module group from the M power modules. The target power module group includes the first module number of power modules.

[0159] ​Let i0=Pn / P, P is the maximum output power of each power module, Pn is the charging power included in the charging power range, if i0 is an integer, the first module number is i=i0, if i0 is not an integer, the first module number is i=i0 integer bit+1, for example, the ratio of the charging power included in the charging power range 0~P and P is a number less than 1, then the first module number is determined to be 1, and one power module is determined from the M power modules.

[0160] In some embodiments, according to the first module number, at least one first power module group is determined from the M power modules; according to the module connection mode, the number of each switch unit corresponding to the at least one first power module group is obtained; and according to the number of each switch unit, a target power module group is determined from the at least one first power module group.

[0161] According to the first module number, at least one first power module group can be determined from the M power modules, and a first power module group includes: the first module number of power modules, then according to the module connection mode, i.e. module parallel connection, the number of each switch unit corresponding to the at least one first power module group is obtained, i.e. according to the first module number, from the M power modules, a plurality of first power module groups meeting the condition can be determined, in order to reduce the number of switches used, according to the module parallel connection mode, the number of switch units used by each first power module group can be further obtained, and then the switch unit with the least number of switches is used as the target power module group. Thus, it is ensured that the switch state table is generated by the switch combination with the least number of switch units under the condition of realizing the same function.

[0162] If the module connection mode is module series connection, according to each charging voltage range and the M charging power ranges, the second module number and the module group number are determined; according to the second module number and the module group number, a target power module group is determined from the M power modules, and the target power module group includes: the module group number of second power module groups, and one second power module group includes: the second module number of power modules.

[0163] Let j0=charging voltage included in the charging voltage range / V0, if j0 is an integer, the second module number j is j0, if j0 is not an integer, the second module number j=j0 integer bit+1, for example, j0=charging voltage included in the charging voltage range 0~V0 / V0, j0 is not an integer, then the second module number j=1.

[0164] In a case where the charging power Pn included in the charging power range is less than j*P, the module group number is determined as 1, that is, one second power module group, and the one second power module group includes: j power modules, wherein the connection mode between the second power module groups of the module group number is a parallel connection mode, and the connection mode between the j power module groups is a module series connection, that is, in this example, only j power modules in series are needed, based on which, the state information of each switch unit corresponding to each charging power range can be obtained to realize successful calling of the power module.

[0165] In a case where the charging power Pn included in the charging power range is greater than j*P, the module group number k0=Pn / j*P, if the module group number k0 is an integer, the module group number k=k0, if the module group number k0 is not an integer, the module group number k is the integer part of k0+1, one module group is composed of j power modules in series, and k second power module groups of the module group number are connected in parallel.

[0166] In some embodiments, according to the second module number and the module group number, at least one third power module group is determined from the M power modules; according to the module connection mode and the module group connection mode, the number of each switch unit corresponding to the at least one third power module group is obtained; and according to the number of each switch unit, a target power module group is determined from the at least one third power module group.

[0167] According to the second module number and the module group number, at least one third power module group can be determined from the M power modules, one third power module group includes: second power modules of the module group number, one second power module includes: power modules of the second module number, and then according to the module group connection mode and the module connection mode, the number of each switch unit corresponding to the at least one third power module group is obtained, wherein the module group connection mode is a parallel connection, and the module connection mode is a series connection, in order to reduce the number of switches used, the switch unit used the least can also be used as the target power module group. Thus, it is ensured that the switch state table is generated by the switch combination with the least switch units under the condition of realizing the same function.

[0168] S504, according to the target power module group and the module connection mode, the state information of each switch unit corresponding to the M charging power ranges is obtained.

[0169] S505, according to the M charging power ranges and the state information of each switch unit corresponding to the M charging power ranges, a switch state table corresponding to each charging voltage range is generated.

[0170] According to the target power module group and the module connection mode, the state information of each switch unit corresponding to the M charging power ranges can be obtained, the switch unit including a first switch unit, a second switch unit and a third switch unit.

[0171] Then, according to the M charging power ranges and the state information of each switch unit corresponding to the M charging power ranges, a switch state table corresponding to each charging voltage range is generated, one charging voltage range corresponds to one switch state table, and the state information of each switch unit corresponding to the M charging power ranges is included in one switch state table.

[0172] In the charging control method of the embodiment, by generating the switch state table corresponding to each charging voltage range, in the subsequent charging process, the switch state of each switch unit can be obtained by querying the corresponding switch state table, and the corresponding switch control signal is generated. The charging control efficiency is improved.

[0173] On the basis of the above switch state table, the charging control method of the present application is described below with one specific embodiment.

[0174] Figure 13 Another specific circuit structure schematic diagram of the charging system provided by the embodiment of the present application is shown in FIG. 4, which has four power modules, two charging interfaces (A1 and A2), and two charging interfaces are respectively connected with one charging gun, and the charging gun is used to connect the device to be charged. Figure 13

[0175] The following cases are described respectively:

[0176] The first kind, the charging demand voltage of A1 gun and A2 gun is less than V0, then the module connection mode of A1 gun and A2 gun is parallel, and Table 1 is a schematic table of the calling situation of the power module, as shown in Table 1:

[0177]

[0178]

[0179] Table 1

[0180] As can be seen from Table 1, taking the first row as an example, the charging demand power of A1 gun is 0, indicating that A1 gun is connected with the vehicle to be charged, but the charging has not been triggered, and the power module P4 is called to charge A2 gun, so that the maximum power obtained by A2 is P, and the switch state is closed, that is, S2_21, S8_21 and S8_22 are closed.

[0181] ​Taking the ninth row as an example, if the charging demand power of the A1 gun is 3*P and the charging demand power of the A2 gun is 2*P, the A1 gun and the A2 gun have a charging conflict, since the charging priority of the device to be charged connected to the A1 gun is high, three power modules are called for the A1 gun, and the remaining one power module is called for the A2 gun, so that the power modules called for the A1 gun and the A2 gun are P1, P2, P3, P4, S2_01, S2_11, S2_21, S1_01, S1_02, S7_1, S7_2, S7_3, S7_1, S8_11, S8_12, S8_21, S8_22 are closed. Of course, if the charging demand power of the A1 gun is 3*P and the charging demand power of the A2 gun is P, the switch states are similar to the process.

[0182] The explanations of other rows in Table 1 are similar to the above explanations, which are not described here again.

[0183] The second, the A1 gun demand voltage is less than or equal to V0, the module connection mode of the A1 gun is parallel, the A2 gun demand voltage is V0~2*V0, the module connection mode of the A2 gun is series, Table 2 is a schematic table two of the calling situation of the power module, as shown in Table 2:

[0184]

[0185]

[0186] Table 2

[0187] As can be seen from Table 2, taking the first row as an example, the A1 gun charging demand power is 0, indicating that the A1 gun is connected with a vehicle to be charged, but the charging has not been triggered, the power modules P3, P4 are called for the A2 gun charging, so that the maximum power obtained by the A2 is 2*P, and the switch state is indicated by •, that is, S0_20, S2_11, S1_03, S8_21, S8_22 are closed.

[0188] The explanations of other rows in Table 2 are similar to the above explanations, which are not described here again.

[0189] The third, the A1 gun demand voltage is less than V0, the module connection mode of the A1 gun is parallel, the A2 gun demand voltage is 2V0~3V0, the module connection mode of the A2 gun is series, Table 3 is a schematic table three of the calling situation of the power module, as shown in Table 3:

[0190]

[0191] Table 3

[0192] As can be seen from Table 3, taking the first row as an example, the A1 gun has no charging demand power, indicating that the A1 gun is connected with a vehicle to be charged, but has not triggered charging, and the power modules P2, P3 and P4 are called to charge the A2 gun, so that the A2 gun obtains the maximum power 3*P, and the ● indicates that the switch state is in a closed state, i.e., S0_10, S0_20, S2_01, S1_02, S1_03, S8_21 and S8_22 are closed.

[0193] The explanations of other rows in Table 3 are similar to the above explanations, which will not be repeated here.

[0194] The fourth, the A gun has no power demand, the A2 gun demands voltage 3V0~4V0, and the module connection mode of the A2 gun is in series. Table 4 is a schematic table four of the calling situation of the power module, as shown in Table 4:

[0195]

[0196] Table 4

[0197] As can be seen from Table 4, taking the first row as an example, the A1 gun has no charging demand power, and the power modules P1, P2, P3 and P4 are called to charge the A2 gun, so that the A2 gun obtains the maximum power 4*P, and the ● indicates that the switch state is in a closed state, i.e., S0_00, S0_10, S0_20, S1_01, S1_02, S1_03, S8_21 and S8_22 are closed.

[0198] The explanations of other rows in Table 4 are similar to the above explanations, which will not be repeated here.

[0199] The fifth, the A1 gun demands voltage V0~2V0, the module connection mode of the A1 gun is in series, the A2 gun demands voltage less than V0, and the module connection mode of the A2 gun is in parallel. Table 5 is a schematic table five of the calling situation of the power module, as shown in Table 5:

[0200]

[0201]

[0202] Table 5

[0203] As can be seen from Table 5, taking the first row as an example, the A2 gun has no charging demand power, indicating that the A2 gun is connected with a vehicle to be charged, but has not triggered charging, and the power modules P1 and P2 are called to charge the A1 gun, so that the A1 gun obtains the maximum power 2*P, and the ● indicates that the switch state is in a closed state, i.e., S0_00, S7_2, S8_11 and S8_12 are closed.

[0204] The explanations of other rows in Table 5 are similar to the above explanations, which will not be repeated here.

[0205] Sixth, A1 gun demand voltage 2V0~3V0, A1 gun module connection mode for series, A2 gun demand voltage less than V0, A2 gun module connection mode for parallel, table 6 is the schematic table six of power module calling condition, as shown in table 6:

[0206]

[0207] Table 6

[0208] As can be seen from table 6, taking the first row as an example, A2 gun charging demand power is 0, indicating that A2 gun is connected with the vehicle to be charged, but has not triggered charging, calling power module P1, P2, P3 to charge A1 gun, so that A1 gets the maximum power 3*P, and ● indicates that the switch state is closed, that is, S0_00, S0_10, S7_3, S8_11, S8_12 are closed.

[0209] The explanation of other rows in / 6 is similar to the above explanation, which will not be repeated here.

[0210] Seventh, A gun demand voltage less than 3V0~4V0, A1 gun module connection mode for series, A2 gun has no power demand, table 7 is the schematic table seven of power module calling condition, as shown in table 7:

[0211]

[0212] Table 7

[0213] As can be seen from table 7, A2 gun charging demand power is 0, indicating that A2 gun is connected with the vehicle to be charged, but has not triggered charging, calling power module P1, P2, P3, P4 to charge A1 gun, so that A1 gets the maximum power 4*P, and ● indicates that the switch state is closed, that is, S0_00, S0_10, S0_20, S8_11, S8_12 are closed.

[0214] Eighth, A gun demand voltage 500Vdc~1000Vdc, A2 gun demand voltage 500Vdc~1000Vdc, table 8 is the schematic table eight of power module calling condition, as shown in table 8:

[0215]

[0216] Table 8

[0217] As can be seen from table 8, calling power module P1, P2, P3, P4 to charge A1 gun and A2 gun, so that A1 gun and A2 gun get the maximum power 2*P respectively.

[0218] Based on the same inventive concept, the application also provides a charging control device corresponding to the charging control method. Since the device solves problems in the same principle as the charging control method described above, the implementation of the device can be referred to the implementation of the method, and the repeated parts will not be described here.

[0219] Figure 14 The charging control device provided in the application is shown in the structural schematic diagram, which can be integrated in the control unit described above. As shown in the figure, the device can include: Figure 14

[0220] The acquisition module 601 is configured to acquire the charging demand parameters of at least one to-be-charged device connected to at least one charging interface.

[0221] The determination module 602 is configured to determine the switch control signal corresponding to each to-be-charged device according to the charging demand parameters of each to-be-charged device.

[0222] The determination module 602 is further configured to control the closing or opening of the first switch unit, the second switch unit and the third switch unit according to the switch control signal corresponding to each to-be-charged device, so as to connect the corresponding power module in the M power modules in series and / or in parallel.

[0223] The control module 603 is configured to control the corresponding power module connected in series and / or in parallel to charge each to-be-charged device through the charging interface corresponding to each to-be-charged device.

[0224] In an optional embodiment, the charging demand parameters include charging demand voltage and charging demand power; and the determination module 602 is specifically configured to:

[0225] determine the switch state of the first switch unit, the second switch unit and the third switch unit according to the charging demand voltage and the charging demand power of each to-be-charged device;

[0226] generate the switch control signal corresponding to each to-be-charged device according to the switch state.

[0227] In an optional embodiment, the number of at least one charging interface is greater than or equal to 2; and the determination module 602 is specifically configured to:

[0228] determine whether there is a charging conflict in at least one to-be-charged device according to the charging demand parameters of at least one to-be-charged device;

[0229] if there is no charging conflict in at least one to-be-charged device, determine the switch control signal corresponding to each to-be-charged device according to the charging demand parameters of each to-be-charged device;

[0230] ​If the at least one to-be-charged device has a charging conflict, a switch control signal corresponding to each to-be-charged device is obtained in sequence according to the charging demand parameter of each to-be-charged device and the charging priority of each to-be-charged device.

[0231] In an optional embodiment, the determining module 602 is specifically configured to:

[0232] According to the charging demand voltage of each to-be-charged device, a target switch state table is determined from a plurality of preset switch state tables, each switch state table including a plurality of charging power ranges corresponding to a charging voltage range and state information of a switch unit corresponding to each charging power range.

[0233] According to the charging demand power of each to-be-charged device, the target switch state table is queried to obtain a switch state.

[0234] The description of the processing procedure of each module in the device and the interaction procedure between the modules can refer to the related description in the above method embodiments, and will not be described in detail here.

[0235] The embodiment of the present application further provides a computer readable storage medium, and the computer readable storage medium stores a computer program. The computer program is executed by a controller, and the controller executes the above method.

[0236] In the embodiment of the present application, the computer program executed by the controller can also execute other machine readable instructions to execute the method described in other embodiments. For specific method steps and principles, refer to the description of the embodiments, which will not be described in detail here.

[0237] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other manners. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0238] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0239] In addition, each of the functional units in the embodiments of the present application can be integrated in one processing unit, or each can exist as an independent physical unit, or two or more than two of them can be integrated in one physical unit.

[0240] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of a software product, and the computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0241] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings, in addition, the terms "first", "second", "third" and the like are only used to distinguish description, and cannot be understood as indicating or implying relative importance.

[0242] Finally, it should be noted that: the above-described embodiments are merely specific embodiments of the present application, used to illustrate the technical solutions of the present application, and not to limit them, the protection scope of the present application is not limited thereto, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: any skilled person in the art within the technical scope disclosed by the present application, they can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application. All should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A charging system, characterized by, The charging system comprises: M power modules, N charging interfaces, a first switch unit, a second switch unit, a third switch unit, and a control unit; M and N are integers greater than or equal to 2; input ends of the M power modules are used to connect preset power supplies, wherein positive and negative output ends of adjacent two power modules are connected with the first switch unit, positive output ends of the adjacent two power modules are connected with the second switch unit to form a first positive power line of the M power modules, and negative output ends of the adjacent two power modules are connected to form a negative power line of the M power modules; the first positive power line is connected with positive power supply ends of the N charging interfaces, the negative power line is connected with negative power supply ends of the N charging interfaces, and negative output ends of a first power module to an (M-1)th power module are connected with the negative power line through the third switch unit; the first switch unit, the second switch unit, and the third switch unit are connected with the control unit, so that corresponding power modules in the M power modules are connected in series and / or parallel through the control of the first switch unit, the second switch unit, and the third switch unit being closed or disconnected, and the corresponding power modules after being connected in series and / or parallel are charged through corresponding charging interfaces; the charging system further comprises a fourth switch unit, positive output ends of adjacent two power modules in the first power module to the (M-1)th power module are connected with the fourth switch unit to form a second positive power line of the first power module to the (M-1)th power module, the second positive power line is connected with the positive power supply ends of the N charging interfaces, wherein the fourth switch unit is connected with the control unit, when two charging interfaces are used to charge two vehicles to be charged respectively, if the two charging interfaces both need to use a positive power line to call different power modules to charge, in order to charge the two vehicles to be charged at the same time, the two charging interfaces are controlled to pass through the first positive power line and the second positive power line respectively, so as to call different power modules to charge the two vehicles to be charged; the charging system further comprises a fifth switch unit, M-2 connection points on the first positive power line are connected with corresponding connection points of the second positive power line through the fifth switch unit, the M-2 connection points are positive output ends of M-2 power modules in the M power modules on the first positive power line, the M-2 power modules comprise a second power module to an (M-1)th power module, wherein the fifth switch unit is connected with the control unit, so as to be closed or disconnected under the control of the control unit, when the first positive power line and the second positive power line are used to call the power modules at the same time, the control unit controls the fifth switch unit between the connection point on the first positive power line and the corresponding connection point on the second positive power line to be disconnected. The charging system further comprises a sixth switch unit, and positive output ends of the second power module to the Mth power module are connected to the first positive power line through the sixth switch unit, wherein the sixth switch unit is connected to the control unit to be closed or opened under the control of the control unit.

2. The charging system of claim 1, wherein, The charging system further comprises N seventh switch units and N eighth switch units, and the first positive power line is connected to the positive power supply end in the N charging interfaces through the N seventh switch units, and the negative power line is connected to the negative power supply end in the N charging interfaces through the N eighth switch units.

3. A charge control method characterized by, The control unit applied to the charging system of claim 1 or 2, the method comprises: obtaining the charging demand parameters of at least one to-be-charged device connected to at least one charging interface; determining the switch control signal corresponding to each to-be-charged device according to the charging demand parameters of each to-be-charged device; controlling the first switch unit, the second switch unit and the third switch unit to be closed or opened according to the switch control signal corresponding to each to-be-charged device, so as to connect the corresponding power module in the M power modules in series and / or in parallel; controlling the corresponding power module after series and / or parallel connection to charge each to-be-charged device through the charging interface corresponding to each to-be-charged device; When two charging interfaces are used to charge two to-be-charged vehicles respectively, if the two charging interfaces need to use the positive power line to call different power modules for charging, in order to charge the two to-be-charged vehicles at the same time, the control unit controls the two charging interfaces to pass through the first positive power line and the second positive power line respectively, so as to call different power modules to charge the two to-be-charged vehicles; when the first positive power line and the second positive power line are used to call the power module, the control unit controls the fifth switch unit between the connection point on the first positive power line and the corresponding connection point on the second positive power line to be opened.

4. The method of claim 3, wherein, The charging demand parameters include charging demand voltage and charging demand power; and the determination of the switch control signal corresponding to each to-be-charged device according to the charging demand parameters of each to-be-charged device comprises: determining the switch state of the first switch unit, the second switch unit and the third switch unit according to the charging demand voltage and the charging demand power of each to-be-charged device; generating the switch control signal corresponding to each to-be-charged device according to the switch state.

5. The method of claim 3, wherein, The number of the at least one charging interface is greater than or equal to 2; and the determination of the switch control signal corresponding to each to-be-charged device according to the charging demand parameters of each to-be-charged device comprises: judging whether there is a charging conflict in the at least one to-be-charged device according to the charging demand parameters of the at least one to-be-charged device; if there is no charging conflict in the at least one to-be-charged device, determining the switch control signal corresponding to each to-be-charged device according to the charging demand parameters of each to-be-charged device; If the at least one to-be-charged device has a charging conflict, a switch control signal corresponding to each to-be-charged device is obtained in sequence according to the charging demand parameter of each to-be-charged device and the charging priority of each to-be-charged device.

6. The method of claim 4, wherein, The switch state of the first switch unit, the second switch unit and the third switch unit is determined according to the charging demand voltage and the charging demand power of each to-be-charged device, including: According to the charging demand voltage of each to-be-charged device, a target switch state table is determined from a plurality of preset switch state tables, each switch state table including: a plurality of charging power ranges corresponding to a charging voltage range and state information of a switch unit corresponding to each charging power range; According to the charging demand power of each to-be-charged device, the target switch state table is queried to obtain the switch state.

7. A charge control device, characterized by comprising: The control unit applied to the charging system of claim 1 or 2, comprising: An acquisition module is configured to acquire charging demand parameters of at least one to-be-charged device connected to at least one charging interface; A determination module is configured to determine a switch control signal corresponding to each to-be-charged device according to the charging demand parameter of each to-be-charged device; The determination module is further configured to control the closing or opening of the first switch unit, the second switch unit and the third switch unit according to the switch control signal corresponding to each to-be-charged device, so as to connect the corresponding power module in the M power modules in series and / or in parallel; A control module is configured to control the corresponding power module connected in series and / or in parallel to charge each to-be-charged device through the charging interface corresponding to each to-be-charged device; When two charging interfaces are used to charge two to-be-charged vehicles respectively, if the two charging interfaces need to use positive power lines to call different power modules for charging, in order to charge the two to-be-charged vehicles at the same time, the control module controls the two charging interfaces to pass through the first positive power line and the second positive power line respectively, so as to call different power modules to charge the two to-be-charged vehicles; when the first positive power line and the second positive power line are used to call the power module at the same time, the control unit controls the fifth switch unit between the connection point on the first positive power line and the corresponding connection point on the second positive power line to be disconnected.

Images