Electric vehicle charging system, charging method and electric vehicle

Abstract

This article provides a charging system, a charging method and an electric vehicle for an electric vehicle, wherein the system includes a human-machine interaction module, a power module and a main control module; the human-machine interaction module is connected to the main control module, receives the charging demand information of the electric vehicle, and sends the charging demand information to the main control module; the power module includes multiple power branches, each of which includes a switch unit and a power unit, and the switch unit is connected or disconnected according to the opening or closing signal of the main control module; the main control module is configured to determine the power unit to be turned on or off in the power module according to the charging demand information when receiving the charging demand of the electric vehicle, send an opening or closing signal to the power branch where the power unit to be turned on or off is located, and control the switch unit to be turned on or off, and the power unit to be turned on or off. This article has the function of large current and high power output, and can also control the operation of some internal power supplies according to the charging demand, and has a regulation function.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicle charging, and in particular to a charging system and a charging method for an electric vehicle and an electric vehicle. Background Art

[0002] With the rapid development of the automobile industry and the enhancement of people's environmental awareness, new energy electric vehicles are becoming more and more popular. The principle of new energy electric vehicles is to convert electrical energy into kinetic energy through motors to drive the car. Its energy storage system is a battery. In order to ensure the normal operation of the motor, the battery must be charged.

[0003] A charging system is required for charging. The core component of the charging system is the power supply, which converts the AC power on the grid into DC power to charge the battery of the electric vehicle. At present, the output power of the power supply in the charging system is generally small, and the charging is slow. With the development of electric vehicle charging, the concept of "super charging" has come into being. The most obvious advantage of "super charging" is the fast charging speed (large current and high power), which requires the charging system to have a large current and high power output function, and the output power should reach 100kw or 200kw. At present, there is no power supply that can output this power. Summary of the invention

[0004] The purpose of the embodiments of this article is to provide an electric vehicle charging system, a charging method and an electric vehicle, which have large current and high power output functions, and can also control the internal power supply to be turned on according to the charging demand, thereby reducing a large amount of unnecessary energy loss and achieving energy saving purposes, and at the same time have an automatic adjustment function.

[0005] To achieve the above-mentioned purpose, on the one hand, the embodiment of this article provides a charging system for an electric vehicle, including: a human-computer interaction module, a power module and a main control module;

[0006] The human-computer interaction module is connected to the main control module, and is used to receive the charging demand information of the electric vehicle, and send the charging demand information to the main control module;

[0007] The power module includes multiple power branches, each of which includes a switch unit and a power unit. The switch unit is used to connect or disconnect the power branch according to the start signal or the shutdown signal of the main control module.

[0008] The main control module is configured to determine the power supply unit to be turned on or the power supply unit to be turned off in the power supply module according to the charging demand information when receiving the charging demand of the electric vehicle, send an on signal or a off signal to the power branch where the power supply unit to be turned on or the power supply unit to be turned off is located, and control the switch unit to be turned on or off and the power supply unit to be turned on or off.

[0009] Preferably, a plurality of power supply branches are connected in parallel.

[0010] Preferably, the charging system further comprises: a state detection module;

[0011] The status detection module is connected to the main control module and is used to detect the status of the charging system in real time and send the status information of the charging system to the main control module;

[0012] The main control module is also configured to analyze the charging status information of the charging system when receiving the charging demand of the electric vehicle. When the analysis result shows that the status is normal, it executes the steps of determining the power supply unit to be turned on in the power supply module according to the charging demand information, and sending a start signal to the power branch where the power supply unit to be turned on is located, so as to control the switch unit to be turned on and the power supply unit to be turned on.

[0013] Preferably, the status information of the charging system includes: the input voltage of the charging system, the temperature of the charging system and the properties of each power supply unit;

[0014] The main control module includes a judgment unit and a selection unit;

[0015] The judgment unit is configured to perform the following state judgment process after receiving the charging demand of the electric vehicle: judging whether the input voltage of the charging system is within the standard voltage range, whether the temperature of the charging system is below the system standard temperature, and whether the properties of all power supply units are normal;

[0016] If the judgment results of all items are yes, it is determined that the status of the charging system is normal;

[0017] If the judgment result of any one item is negative, it is determined that the state of the charging system is abnormal;

[0018] The selection unit is configured to determine the power supply unit to be turned on in the power supply module according to the charging demand information, send a start signal to the power supply branch where the power supply unit to be turned on is located, and control the switch unit to be turned on and the power supply unit to be turned on.

[0019] Preferably, the judgment unit is also configured to, when the judgment result of a certain item is no, execute the following steps to determine whether the state of the charging system is abnormal: continuously judge the item and count the number of times the judgment result is no, when the counted number of times does not reach the preset number of times, the judgment result of the item becomes yes, then it is determined that the state of the charging system is normal; when the counted number of times reaches the preset number of times, the judgment result of the item is still no, then it is determined that the state of the charging system is abnormal.

[0020] Preferably, the judgment unit is further configured to judge whether the charging demand information meets a preset range after receiving the charging demand information of the electric vehicle;

[0021] If yes, the judgment process is performed according to the charging demand information, and the number N of power supply units to be turned on in the power supply module is determined;

[0022] If not, a prompt message indicating that the charging demand exceeds the range is sent to the human-computer interaction module.

[0023] Preferably, the selection unit is further configured to screen out normal power supply units according to the properties of all power supply units in the power supply module;

[0024] The selection unit determines the power supply unit to be turned on in the power supply module according to the charging requirement information, further comprising: determining the power supply unit to be turned on from the screened power supply units according to the charging requirement information.

[0025] Preferably, the selection unit is further configured to screen out normal power supply units according to the properties of all power supply units in the power supply module;

[0026] The selection unit determines the power supply unit to be turned on in the power supply module according to the charging requirement information, and further determines the power supply unit to be turned on from the screened power supply units according to the charging requirement information and the power supply performance.

[0027] Preferably, the power supply performance includes the number of failures and the length of time in use;

[0028] The selection unit is also configured to sort the screened power supplies in order of the number of failures from small to large and the usage time from small to large; according to the number N of power supply units to be turned on in the power supply module, the first N power supply units in the sorting are selected as the power supply units to be turned on.

[0029] Preferably, the main control module is further configured to calculate the difference between the input power and the output power of the charging system in real time during the charging process of the electric vehicle;

[0030] If the difference is less than the set value, the electric vehicle continues to be charged;

[0031] If the difference is greater than the set value, charging of the electric vehicle is stopped.

[0032] Preferably, the main control module is further configured to determine whether the temperature of all turned-on power supply units exceeds the power supply standard temperature during the charging process of the electric vehicle;

[0033] If the temperature of a certain turned-on power supply unit exceeds the power supply standard temperature, the output current of other turned-on power supply units is increased, and the output current of the power supply unit is reduced.

[0034] Preferably, the main control module is further configured to determine whether there is an unpowered power supply unit before increasing the output current of other powered-on power supply units;

[0035] If yes, sending a start signal to the power branch where the unstarted power supply unit is located, and sending a shut down signal to the power branch where the power supply unit whose temperature exceeds the standard power supply temperature is located;

[0036] If not, the output current of other turned-on power supply units is increased, and the output current of the power supply unit whose temperature exceeds the standard temperature of the power supply is reduced.

[0037] Preferably, the charging system further comprises a cooling fan;

[0038] The main control module is also configured to determine whether the temperature of the charging system is greater than the system standard temperature during the charging process of the electric vehicle;

[0039] If yes, increase the speed of the cooling fan;

[0040] If not, keep the speed of the cooling fan unchanged.

[0041] Preferably, the main control module is further configured to determine whether the output current of the charging system is greater than a current threshold during the charging process of the electric vehicle;

[0042] If so, a fault prompt message is sent to the human-computer interaction module, and charging of the electric vehicle is stopped;

[0043] If not, continue to charge the electric vehicle.

[0044] On the other hand, an embodiment of the present invention provides a charging method for an electric vehicle, which is applied to a main control module of a charging system for an electric vehicle as described above, and the charging method includes:

[0045] Receive charging demand information of electric vehicles;

[0046] When receiving the charging demand of the electric vehicle, determining the power supply unit to be turned on or the power supply unit to be turned off in the power supply module according to the charging demand information;

[0047] Sending an on signal or a off signal to the power supply unit to be turned on or to the power supply branch where the power supply unit to be turned off is located.

[0048] On the other hand, the embodiments of the present invention further provide a computer device, including a memory, a processor, and a computer program stored in the memory, wherein when the computer program is executed by the processor, any of the above methods is executed.

[0049] On the other hand, the embodiments of the present invention further provide a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor of a computer device, the method according to any one of the above items is executed.

[0050] On the other hand, the embodiments of this document further provide an electric vehicle, including a charging system for the electric vehicle according to any one of the above items.

[0051] It can be seen from the technical solutions provided in the above embodiments of the present invention that the embodiments of the present invention receive charging demand information of the electric vehicle; when receiving the charging demand of the electric vehicle, determine the power supply unit to be turned on or off in the power module according to the charging demand information; send an opening signal or close the power branch where the power supply unit to be turned on is located, so as to have a large current and high power output function, and can also control the operation of part of the internal power supply according to the charging demand, which can reduce a large amount of unnecessary energy loss and achieve the purpose of energy saving, and at the same time has an automatic adjustment function.

[0052] In order to make the above and other purposes, features and advantages of this article more obvious and easy to understand, the following specifically cites preferred embodiments and describes them in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of this article or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of this article. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0054] Figure 1 A schematic diagram of the module structure of a charging system for an electric vehicle provided in an embodiment of this invention is shown;

[0055] Figure 2 The structure diagram of the power module provided in the embodiment of this invention is shown;

[0056] Figure 3 The schematic diagram of the structure of the main control module provided in the embodiment of this article is shown;

[0057] Figure 4 A schematic diagram of a charging method for an electric vehicle provided in an embodiment of the present invention is shown;

[0058] Figure 5 A schematic diagram of the module structure of a charging device for an electric vehicle provided in an embodiment of this invention is shown;

[0059] Figure 6 A schematic diagram of the structure of a computer device provided in an embodiment of this invention is shown.

[0060] Description of the accompanying symbols:

[0061] 100. Main control module;

[0062] 200. Human-computer interaction module;

[0063] 300, power module;

[0064] 400. Status detection module;

[0065] 500, judgment unit;

[0066] 600, selection unit;

[0067] 700, receiving unit;

[0068] 602. Computer equipment;

[0069] 604, processor;

[0070] 606. Memory;

[0071] 608, driving mechanism;

[0072] 610, input / output module;

[0073] 612. Input devices;

[0074] 614. Output device;

[0075] 616. Presentation equipment;

[0076] 618. Graphical user interface;

[0077] 620, network interface;

[0078] 622, communication link;

[0079] 624. Communication bus. DETAILED DESCRIPTION

[0080] The following will be combined with the drawings in the embodiments of this article to clearly and completely describe the technical solutions in the embodiments of this article. Obviously, the described embodiments are only part of the embodiments of this article, not all of the embodiments. Based on the embodiments of this article, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this article.

[0081] When charging electric vehicles, a charging system is needed. The core component of the charging system is the power supply, which converts the AC power on the grid into DC power to charge the electric vehicle battery. At present, the output power of the power supply in the charging system is generally small, and the charging is slow. With the development of electric vehicle charging, the concept of "super charging" has come into being. The most obvious advantage of "super charging" is the fast charging speed (large current and high power), which requires the charging system to have a large current and high power output function, and the output power should reach 100kw or 200kw. At present, there is no power supply that can output this power.

[0082] Reference Figure 1 , In order to solve the above problems, the embodiment of this article provides a charging system for an electric vehicle, including: a human-computer interaction module 200, a power module 300 and a main control module 100;

[0083] The human-computer interaction module 200 is connected to the main control module 100 and is used to receive the charging demand information of the electric vehicle and send the charging demand information to the main control module 100;

[0084] The power module 300 includes a plurality of power branches, each of which includes a switch unit and a power unit, and the switch unit is used to connect or disconnect the power branch according to the start signal or the shutdown signal of the main control module 100;

[0085] The main control module 100 is configured to determine the power supply unit to be turned on or the power supply unit to be turned off in the power supply module 300 according to the charging demand information when receiving the charging demand of the electric vehicle, send an on signal or a off signal to the power branch where the power supply unit to be turned on or the power supply unit to be turned off is located, and control the switch unit to be turned on or off and the power supply unit to be turned on or off.

[0086] The human-machine interaction module 200 may be a display screen with an operable interface on the display screen, and the owner may input the charging requirements of the electric vehicle through the operable interface on the display screen. In addition, the human-machine interaction module 200 may also be integrated on a handheld terminal, such as a mobile phone or a tablet computer, and the owner may directly input the charging requirements of the electric vehicle through the handheld terminal.

[0087] Specifically, the charging demand information includes charging current and charging power, and the charging power may also be charging time. After the car owner inputs the charging demand into the human-computer interaction module 200 , the human-computer interaction module 200 sends the charging demand information to the main control module 100 .

[0088] Multiple power branches are connected in parallel. It should be noted that the parallel connection shown in this article does not mean that multiple power branches are connected in parallel, but means that multiple power branches are connected in parallel in connection structure, that is, the lines of multiple power branches are connected in parallel.

[0089] Reference Figure 2In one embodiment, all power branches connected in parallel can be numbered as 1, 2, 3... Power branch 1 includes switch unit 1 and power unit 1, and the same applies to other subsequent power branches. It can be further understood that in some embodiments, multiple power units can be connected in series in each power branch. Taking power branch 1 as an example, 2 or 3 or any suitable number of power units can be connected in series in power branch 1. Therefore, in some embodiments, the following situations may exist: power branch 1 includes a switch unit and 2 power units; other power branches include a switch unit and a power unit. That is, among multiple power branches, at least one power branch with multiple power units connected in series is connected in parallel with the remaining power branches with only one power unit; or among multiple power branches, each power branch is connected in series with multiple power units. The power unit is a power supply (AC / DC) for charging electric vehicles, and the switch unit can be an electromagnetic relay arranged outside the power unit and connected to the power unit, or it can be an electromagnetic relay integrated on the power unit. The power branch where it is connected on / off is realized.

[0090] The main control module 100 can determine the power supply unit to be turned on or off according to the charging demand information. There can be multiple power supply units to be turned on, and the switch units of the multiple power supply units to be turned on receive the start signal of the main control module, and multiple power supply branches will be turned on. Since the power supply branches are arranged in parallel, the meaning of the parallel arrangement is: if any two or more power supply branches are opened, then these opened power supply branches are connected in parallel. Therefore, after receiving the start signal of the main control module, the multiple power supply branches are in a parallel state to charge the electric vehicle.

[0091] The car owner can input the charging requirements of the electric car through the human-computer interaction module 200 according to his own needs. When receiving the charging requirements of the electric car, the main control module 100 can determine the corresponding power supply to be turned on or off according to different charging demand information, thereby realizing the high current and high power output function, and controlling the operation of some internal power supplies according to the charging demand, which can reduce a large amount of unnecessary energy loss and achieve energy saving. At the same time, it has an automatic adjustment function.

[0092] Reference Figure 1 , in the embodiment of this article, the charging system further includes: a state detection module 400;

[0093] The state detection module 400 is connected to the main control module 100 and is used to detect the state of the charging system in real time and send the state information of the charging system to the main control module 100;

[0094] The main control module 100 is also configured to analyze the charging status information of the charging system when receiving the charging demand of the electric vehicle. When the analysis result shows that the status is normal, it executes the steps of determining the power supply unit to be turned on in the power supply module 300 according to the charging demand information, and sending a start signal to the power branch where the power supply unit to be turned on is located, so as to control the switch unit to be turned on and the power supply unit to be turned on.

[0095] Specifically, the status detection module 400 includes a system temperature sensor, a system ADC sampling unit, etc. The temperature sensor can collect temperature information of the charging system, and the ADC sampling unit can collect current and voltage information of the charging system. The system temperature sensor and the system ADC sampling unit and other status detection modules 400 can be directly installed in the charging system.

[0096] In addition to the state detection module 400 detecting the charging state of the charging system, for the charging state of each power supply unit, the temperature, current and voltage information of the power supply unit can be collected through the temperature sensor and ADC sampling unit integrated on the power supply unit. The charging state of each power supply unit detected can be directly integrated to obtain the charging state information of the charging system, or the charging state of multiple power supply units can be used to eliminate the charging units with the worst and best charging states, and then the charging states of the remaining power supply units after elimination are integrated to obtain the charging state information of the charging system. Of course, the charging state information of the charging system can also be obtained by other methods, and it is not necessary to stick to the method defined in this article.

[0097] When receiving the charging demand of the electric vehicle, the main control module 100 analyzes the charging status information of the charging system, and executes subsequent steps only when the analysis result shows that the status is normal.

[0098] Reference Figure 3 ,In the embodiment of this article, the state information of the charging system includes: the input voltage of the charging system, the temperature of the charging system and the attributes of each power unit;

[0099] The main control module 100 includes a judgment unit 500 and a selection unit 600;

[0100] The judgment unit 500 is configured to perform the following state judgment process after receiving the charging demand of the electric vehicle: judging whether the input voltage of the charging system is within the standard voltage range, whether the temperature of the charging system is below the system standard temperature, and whether the properties of all power supply units are normal;

[0101] If the judgment results of all items are yes, it is determined that the status of the charging system is normal;

[0102] If the judgment result of any one item is negative, it is determined that the state of the charging system is abnormal;

[0103] The selection unit 600 is configured to determine the power supply unit to be turned on in the power supply module 300 according to the charging demand information, send a start signal to the power branch where the power supply unit to be turned on is located, and control the switch unit to be turned on and the power supply unit to be turned on.

[0104] Among them, the input voltage of the charging system refers to the voltage input to the charging system. Generally speaking, the electric energy in the power grid is input to multiple power supply units, and then output by multiple power supply units to the electric vehicle for charging. The input voltage can be detected by the system ADC sampling unit, and the temperature of the charging system can be detected by the system temperature sensor. The power properties of the power supply unit may include but are not limited to the temperature of the power supply unit, the communication status of the power supply unit, and the discharge status of the power supply unit. In addition, each power supply unit is mostly integrated with a fan, and the power properties of the power supply unit may also include the fan status of the power supply unit. Different sensors, detectors or detectors can be used for detection of the different power properties mentioned above.

[0105] Furthermore, the power attributes of the power supply unit being normal may be that the temperature of the power supply unit is below the standard temperature of the power supply unit, the communication status with the power supply unit is normal, the discharge status of the power supply unit is normal, and the fan status in the power supply unit is normal.

[0106] When executing the state judgment process, as long as the judgment result of any of the above items is no, the state of the charging system is abnormal.

[0107] In the embodiment of this article, the judgment unit 500 is also configured to, when the judgment result of a certain item is no, perform the following steps to determine whether the state of the charging system is abnormal: continuously judge the item and count the number of times the judgment result is no, when the counted number of times does not reach the preset number of times, the judgment result of the item becomes yes, then it is determined that the state of the charging system is normal; when the counted number of times reaches the preset number of times, the judgment result of the item is still no, then it is determined that the state of the charging system is abnormal.

[0108] Specifically, the judgment unit 500 above only performs one state judgment process, and determines the state of the charging system based on the result of this state judgment. However, this method is risky. Since there are many states that need to be judged in the state judgment process, it is impossible to avoid that one or several states are affected by other factors and become abnormal, which results in the state judgment result of the entire charging system being abnormal. In order to avoid this situation, the state judgment process can be executed multiple times in a loop. When the number of consecutive negative judgment results of one of the items is greater than a preset value, the state of the charging system is determined to be abnormal.

[0109] For example, the preset value is 3 times. When the status judgment process is executed for the first time, the temperature of the charging system is greater than the system standard temperature. If the result of the continuous judgment is no for less than 3 times, the status judgment process can be executed for the second time, and the temperature of the charging system is greater than the system standard temperature. If the result of the continuous judgment is no for less than 3 times, the temperature of the charging system is still greater than the system standard temperature when the status judgment process is executed for the third time. If the result of the continuous judgment is no for 3 times, which is equal to 3 times, it is determined that the charging system status is abnormal.

[0110] Of course, if the state judgment process is performed for the third time and the temperature of the charging system is lower than the system standard temperature, it is determined that the state of the charging system is normal.

[0111] However, it is also inevitable that for a certain judgment result, after multiple consecutive judgment results are negative, the subsequent judgment result of yes may be caused by special reasons, including deviations in the state acquisition of this judgment, or other emergencies that cause the judgment result to be yes. Therefore, for any judgment result, after A consecutive judgment results are negative, it is necessary to have B consecutive judgment results of yes to determine that the state of the charging system is normal. The values ​​of A and B can be set according to actual conditions, and this article does not make specific restrictions.

[0112] If the state of the charging system is abnormal, the abnormal information can be sent to the human-computer interaction module 200 to prompt the owner to pay attention to the situation.

[0113] In the embodiment of this article, the judgment unit 500 is further configured to judge whether the charging demand information of the electric vehicle meets a preset range after receiving the charging demand information of the electric vehicle;

[0114] If yes, the judgment process is performed according to the charging demand information, and the number N of power supply units to be turned on in the power supply module is determined;

[0115] If not, a prompt message indicating that the charging requirement exceeds the range is sent to the human-computer interaction module 200 .

[0116] For the required charging current, it is necessary to determine whether the charging current is within the set current range; for the method for determining the required number of power supply units N, it can be determined by the method described above.

[0117] Since the performance of the electric vehicle determines its maximum allowable charging current, and each power unit in the charging system also determines the maximum output current of the charging system when leaving the factory, the maximum value of the set current range should be the smaller value of the maximum allowable charging current of the electric vehicle and the maximum allowable output current of the charging system, and the minimum value of the set current range should be at least 0 amperes.

[0118] The charging voltage of electric vehicles is generally the voltage set at the factory.

[0119] The state judgment process is performed only when the charging demand information meets the preset range. If not, a prompt message indicating that the charging demand exceeds the range is sent to the human-computer interaction module 200. After the owner sees the prompt message through the human-computer interaction module 200, he can re-enter the charging demand and perform the above process of determining whether the charging demand information meets the preset range again until the charging demand information meets the preset range. Alternatively, a prompt message indicating that the charging demand exceeds the range can be sent to the human-computer interaction module 200, and a suitable preset range can be sent at the same time, so that the owner can re-enter the charging demand within the suitable preset range to save execution time and improve charging efficiency.

[0120] In the embodiment of this article, the selection unit 600 is further configured to filter out normal power supply units according to the properties of all power supply units in the power supply module 300;

[0121] The selecting unit 600 determines the power supply unit to be turned on in the power supply module 300 according to the charging requirement information, further comprising: determining the power supply unit to be turned on from the screened power supply units according to the charging requirement information.

[0122] Specifically, the charging demand information is the charging current and the charging power. Since the output current of the power unit is the set current, for the charging current, the required number of power units N can be obtained by dividing the charging current by the set current; all power units are numbered in the order of 1, 2, 3...M, and the power units numbered 1-N are selected as the power units to be turned on. The charging power is the charging power required by the owner, and can also be the charging time.

[0123] In addition, the selection unit 600 is further configured to filter out normal power supply units according to the properties of all power supply units in the power supply module 300;

[0124] The selection unit 600 determines the power supply unit to be turned on in the power supply module 300 according to the charging requirement information, further comprising: determining the power supply unit to be turned on from the screened power supply units according to the charging requirement information and the power supply performance.

[0125] Specifically, power supply performance includes the number of failures and the length of time in use;

[0126] The selection unit 600 is also configured to sort the screened power supplies in the order of the number of failures from small to large and the usage time from small to large; and according to the number N of power supply units to be turned on in the power module, select the first N power supply units in the sort as the power supply units to be turned on.

[0127] The number of faults and the length of time used can be obtained through the historical data of the power supply unit. You can first sort the faults from small to large and the length of time used from small to large to get the fault sorting and length sorting, and fine-tune the fault sorting through the length sorting. The fine-tuning is: if there are multiple power supply units with the same number of faults, check the length sorting of multiple power supply units, and the fault sorting corresponding to the power supply unit with a higher length sorting will be ranked first, and the fault sorting corresponding to the power supply unit with a lower length sorting will be ranked last.

[0128] In the embodiment of this article, the main control module 100 is also configured to calculate the difference between the input power and the output power of the charging system in real time during the charging process of the electric vehicle;

[0129] If the difference is less than the set value, the electric vehicle continues to be charged;

[0130] If the difference is greater than the set value, charging of the electric vehicle is stopped.

[0131] During the charging process, the input power and output power of the charging system need to be calculated in real time. The input power of the charging system is the product of the input voltage of the charging system and the input current of the charging system, and the output power of the charging system is the product of the output voltage of the charging system and the output current of the charging system. The input voltage and input current are the voltage and current input from the power grid to the charging system, and the output voltage and output current are the voltage and current output from the charging system to the electric vehicle.

[0132] The difference between the input power and the output power is the loss value of the charging system itself. If the loss value is less than the set value, it means normal loss. If the loss value is greater than the set value, it means abnormal loss and charging needs to be stopped. After stopping charging, the abnormal information can be sent to the human-computer interaction module 200 to prompt the owner to pay attention.

[0133] In the embodiment of this article, the main control module 100 is also configured to determine whether the temperature of all turned-on power supply units exceeds the power supply standard temperature during the charging process of the electric vehicle;

[0134] If the temperature of a certain turned-on power supply unit exceeds the power supply standard temperature, the output current of other turned-on power supply units is increased, and the output current of the power supply unit is reduced.

[0135] Specifically, the output current of the turned-on power supply unit can be reduced according to the current-temperature variation curve configured when the power supply unit leaves the factory. In the current-temperature variation curve, the horizontal axis is the temperature, and the vertical axis is the output current. The curve reflects the trend of the output current of the power supply unit changing with the temperature. When the temperature of the turned-on power supply unit exceeds the standard temperature of the power supply, the output current of the power supply unit is reduced according to the current-temperature variation curve, so that the output current of the power supply unit is lower than the maximum output current of the power supply at this temperature. In order to ensure that the output current of the entire charging system is constant, it is necessary to increase the output current of other turned-on power supply units, but it is also necessary to ensure that the output current of other turned-on power supply units does not exceed the maximum output current of the power supply according to the current-temperature variation curve.

[0136] In the embodiment of this article, the main control module 100 is further configured to determine whether there is an unpowered power supply unit before increasing the output current of other powered-on power supply units;

[0137] If yes, sending a start signal to the power branch where the unstarted power supply unit is located, and sending a shut down signal to the power branch where the power supply unit whose temperature exceeds the standard power supply temperature is located;

[0138] If not, the output current of other turned-on power supply units is increased, and the output current of the power supply unit whose temperature exceeds the standard temperature of the power supply is reduced.

[0139] Of course, if the temperature of a certain turned-on power supply unit exceeds the standard power supply temperature, the output current of the power supply unit is reduced so that the output current of the power supply unit is lower than the maximum output current of the power supply at the temperature. In order to ensure the constant output current of the entire charging system, the unturned power supply unit can also be turned on.

[0140] Preferably, as described above: sort the selected power supplies in order of the number of failures from small to large and the length of time used from small to large. The N+1th power supply unit can be selected and turned on according to the sorting order. If the output current of the entire charging system cannot be kept constant after turning on the N+1th power supply unit, the N+2th power supply unit can be turned on... Of course, during the turning-on process, it is necessary to ensure that the temperature of all turned-on power supply units does not exceed the standard power supply temperature.

[0141] In the embodiment of this article, the charging system also includes a cooling fan;

[0142] The main control module 100 is also configured to determine whether the temperature of the charging system is greater than the system standard temperature during the charging process of the electric vehicle;

[0143] If yes, increase the speed of the cooling fan;

[0144] If not, keep the speed of the cooling fan unchanged.

[0145] In the embodiment of this article, the main control module 100 is also configured to determine whether the output current of the charging system is greater than the current threshold during the charging process of the electric vehicle;

[0146] If yes, a fault prompt message is sent to the human-computer interaction module 200, and charging of the electric vehicle is stopped;

[0147] If not, continue to charge the electric vehicle.

[0148] The output current of the charging system can be detected by the system ADC sampling unit, and the current threshold can be the smaller value of the maximum allowable charging current of the electric vehicle and the maximum allowable output current of the charging system. If the output current of the charging system is greater than the current threshold, a prompt message is sent to the human-computer interaction module 200 to remind the owner to pay attention to this situation.

[0149] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0150] Reference Figure 4 Based on the above-mentioned charging system for an electric vehicle, the embodiment of this invention further provides a charging method for an electric vehicle, which is applied to the main control module 100 of any of the above-mentioned charging systems for an electric vehicle. The charging method includes:

[0151] S101: receiving charging demand information of an electric vehicle;

[0152] S102: upon receiving a charging demand of the electric vehicle, determining a power supply unit to be turned on or a power supply unit to be turned off in the power supply module according to the charging demand information;

[0153] S103: Sending an on signal or a off signal to the power branch where the power supply unit to be turned on or the power supply unit to be turned off is located.

[0154] Among them, the charging demand information of the electric vehicle is the charging current and the charging power. When the charging demand of the electric vehicle is received, the power supply unit to be turned on in the power module 300 is determined according to the charging demand information: since the output current of the power supply unit is the set current determined at the factory, the output voltage is the set voltage determined at the factory. For the charging current, the required number of power supply units N can be obtained by dividing the charging current by the set current; all power supply units are numbered in the order of 1, 2, 3...M, and the power supply units numbered 1-N are selected as the power supply units to be turned on.

[0155] The charging capacity refers to the charging capacity required by the car owner, and may also be the charging time.

[0156] Based on the above-mentioned charging method of an electric vehicle, an embodiment of this invention also provides a charging device for an electric vehicle. The device may include a system (including a distributed system), software (application), module, component, server, client, etc. using the method described in the embodiment of this invention and a device combined with necessary implementation hardware. Based on the same innovative concept, the device in one or more embodiments provided in the embodiment of this invention is as described in the following embodiments. Since the implementation scheme and method of the device to solve the problem are similar, the implementation of the specific device in the embodiment of this invention can refer to the implementation of the aforementioned method, and the repetitions will not be repeated. As used below, the term "unit" or "module" can implement a combination of software and / or hardware of predetermined functions. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0157] Specifically, Figure 5 is a schematic diagram of a module structure of an embodiment of a charging device for an electric vehicle provided in an embodiment of this invention, referring to Figure 5 As shown, an electric vehicle charging device provided in an embodiment of the present invention includes: a receiving unit 700 and a selecting unit 600 .

[0158] The receiving unit 700 is used to receive the charging demand information of the electric vehicle;

[0159] The selection unit 600 is used to determine the power supply unit to be turned on or the power supply unit to be turned off in the power supply module according to the charging demand information when receiving the charging demand of the electric vehicle; and send an on signal or a off signal to the power branch where the power supply unit to be turned on or the power supply unit to be turned off is located.

[0160] Based on the above-mentioned charging method for an electric vehicle, an embodiment of the present invention further provides an electric vehicle, wherein the electric vehicle comprises any of the above-mentioned charging systems for the electric vehicle.

[0161] Reference Figure 6As shown, based on the above-mentioned charging method for an electric vehicle, a computer device 602 is also provided in one embodiment of the present invention, wherein the above-mentioned method is run on the computer device 602. The computer device 602 may include one or more processors 604, such as one or more central processing units (CPUs) or graphics processing units (GPUs), and each processing unit may implement one or more hardware threads. The computer device 602 may also include any memory 606, which is used to store any kind of information such as code, settings, data, etc. In a specific embodiment, a computer program on the memory 606 and executable on the processor 604, when the computer program is executed by the processor 604, can execute instructions according to the above-mentioned method. Non-limitingly, for example, the memory 606 may include any one or more combinations of the following: any type of RAM, any type of ROM, flash memory device, hard disk, optical disk, etc. More generally, any memory may use any technology to store information. Further, any memory may provide volatile or non-volatile retention of information. Further, any memory may represent a fixed or removable component of the computer device 602. In one embodiment, when the processor 604 executes the associated instructions stored in any memory or combination of memories, the computer device 602 can perform any operation of the associated instructions. The computer device 602 also includes one or more drive mechanisms 608 for interacting with any memory, such as a hard disk drive mechanism, an optical disk drive mechanism, etc.

[0162] The computer device 602 may also include an input / output module 610 (I / O) for receiving various inputs (via input device 612) and for providing various outputs (via output device 614). A specific output mechanism may include a presentation device 616 and an associated graphical user interface 618 (GUI). In other embodiments, the input / output module 610 (I / O), input device 612, and output device 614 may not be included, and the computer device 602 may be used as a computer device in a network. The computer device 602 may also include one or more network interfaces 620 for exchanging data with other devices via one or more communication links 622. One or more communication buses 624 couple the components described above together.

[0163] The communication link 622 may be implemented in any manner, for example, through a local area network, a wide area network (e.g., the Internet), a point-to-point connection, etc., or any combination thereof. The communication link 622 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc. governed by any protocol or combination of protocols.

[0164] Corresponds to Figure 4The method in this article also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are executed.

[0165] The embodiment of the present invention also provides a computer readable instruction, wherein when the processor executes the instruction, the program therein causes the processor to execute the following Figure 4 The method shown.

[0166] The embodiments of this document also provide an electric vehicle, comprising the charging system for the electric vehicle described in any of the above embodiments.

[0167] It should be understood that in the various embodiments of this document, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this document.

[0168] It should also be understood that in the embodiments of this article, the term "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0169] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this article.

[0170] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0171] In the several embodiments provided herein, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or can be electrical, mechanical or other forms of connection.

[0172] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of this article.

[0173] In addition, each functional unit in each embodiment of this invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional unit.

[0174] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this article is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of this article. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0175] Specific embodiments are used in this article to illustrate the principles and implementation methods of this article. The description of the above embodiments is only used to help understand the methods and core ideas of this article. At the same time, for general technicians in this field, according to the ideas of this article, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on this article.

Claims

1. A charging system for an electric vehicle, characterized in that: include: Human-computer interaction module, power module and main control module; The human-computer interaction module is connected to the main control module, and is used to receive charging demand information of the electric vehicle, and send the charging demand information to the main control module; The power module includes a plurality of power branches, each of which includes a switch unit and a power unit, the switch unit is used to connect or disconnect the power branch according to the start signal or the shutdown signal of the main control module, and the plurality of power branches are connected in parallel; The main control module is configured to determine the power supply unit to be turned on or the power supply unit to be turned off in the power supply module according to the charging demand information when receiving the charging demand of the electric vehicle, send an opening signal or a closing signal to the power supply branch where the power supply unit to be turned on or the power supply unit to be turned off is located, and control the switch unit to be turned on or off and the power supply unit to be turned on or off; The main control module includes a judgment unit; The judgment unit is configured to perform the following state judgment process after receiving the charging demand of the electric vehicle: judging whether the input voltage of the charging system is within the standard voltage range, whether the temperature of the charging system is below the system standard temperature, and whether the properties of all power supply units are normal; If the judgment results of all items are yes, it is determined that the state of the charging system is normal; When the judgment result of one item is no, the following steps are performed to determine whether the charging system state is abnormal: Continuously judge this item and count the number of times the judgment result is negative. After the judgment result is negative for A consecutive times, the judgment result is positive for B consecutive times, and it is determined that the state of the charging system is normal. When the statistical number of times reaches the preset number of times, the judgment result of this item is still no, then it is determined that the charging system state is abnormal.

2. The charging system according to claim 1, characterized in that: The charging system further includes: a state detection module; The state detection module is connected to the main control module, and is used to detect the state of the charging system in real time, and send the state information of the charging system to the main control module; The main control module is also configured to analyze the charging status information of the charging system when receiving the charging demand of the electric vehicle. When the analysis result shows that the status is normal, it executes the steps of determining the power supply unit to be turned on in the power supply module according to the charging demand information, sending a start signal to the power supply branch where the power supply unit to be turned on is located, and controlling the switch unit to be turned on and the power supply unit to be turned on.

3. The charging system according to claim 2, characterized in that: The state information of the charging system includes: the input voltage of the charging system, the temperature of the charging system and the properties of each power supply unit; The main control module includes a selection unit; The selection unit is configured to determine the power supply unit to be turned on in the power supply module according to the charging demand information, send a start signal to the power supply branch where the power supply unit to be turned on is located, and control the switch unit to be turned on and the power supply unit to be turned on.

4. The charging system according to claim 3, characterized in that: The judgment unit is further configured to judge whether the charging demand information of the electric vehicle meets a preset range after receiving the charging demand information of the electric vehicle; If yes, the judgment process is performed according to the charging demand information, and the number N of power supply units to be turned on in the power supply module is determined; If not, a prompt message indicating that the charging demand exceeds the range is sent to the human-computer interaction module.

5. The charging system according to claim 3, characterized in that: The selection unit is further configured to filter out normal power supply units according to the properties of all power supply units in the power supply module; The selecting unit determines the power supply unit to be turned on in the power supply module according to the charging requirement information, further comprising: determining the power supply unit to be turned on from the screened power supply units according to the charging requirement information.

6. The charging system according to claim 4, characterized in that: The selection unit is further configured to filter out normal power supply units according to the properties of all power supply units in the power supply module; The selecting unit further determines the power supply unit to be turned on in the power supply module according to the charging requirement information: determining the power supply unit to be turned on from the screened power supply units according to the charging requirement information and power supply performance.

7. The charging system according to claim 6, characterized in that: The power supply performance includes the number of failures and the length of time in use; The selection unit is further configured to sort the screened power supplies in the order of the number of failures from small to large and the length of time used from small to large; According to the number N of power supply units to be started in the power supply module, the first N power supply units in the sorting are selected as the power supply units to be started.

8. The charging system according to claim 1, characterized in that: The main control module is also configured to calculate the difference between the input power and the output power of the charging system in real time during the charging process of the electric vehicle; If the difference is less than the set value, the electric vehicle continues to be charged; If the difference is greater than the set value, charging of the electric vehicle is stopped.

9. The charging system according to claim 1, characterized in that: The main control module is also configured to determine whether the temperature of all turned-on power supply units exceeds the power supply standard temperature during the charging process of the electric vehicle; If the temperature of a certain turned-on power supply unit exceeds the power supply standard temperature, the output current of other turned-on power supply units is increased, and the output current of the power supply unit is reduced.

10. The charging system according to claim 9, characterized in that: The main control module is further configured to determine whether there is an unpowered power supply unit before increasing the output current of other powered-on power supply units; If yes, sending a start signal to the power branch where the unstarted power supply unit is located, and sending a shut down signal to the power branch where the power supply unit whose temperature exceeds the standard power supply temperature is located; If not, the output current of other turned-on power supply units is increased, and the output current of the power supply unit whose temperature exceeds the standard temperature of the power supply is reduced.

11. The charging system according to claim 1, characterized in that: The charging system also includes a cooling fan; The main control module is also configured to determine whether the temperature of the charging system is greater than the system standard temperature during the charging process of the electric vehicle; If yes, increasing the speed of the cooling fan; If not, the speed of the cooling fan is kept unchanged.

12. The charging system according to claim 1, characterized in that: The main control module is also configured to determine whether the output current of the charging system is greater than a current threshold during the charging process of the electric vehicle; If so, a fault prompt message is sent to the human-computer interaction module, and charging of the electric vehicle is stopped; If not, continue to charge the electric vehicle.

13. A method for charging an electric vehicle, characterized in that: In the main control module of the charging system of the electric vehicle according to any one of claims 1 to 12, the charging method comprises: Receive charging demand information of electric vehicles; When receiving a charging demand of the electric vehicle, determining a power supply unit to be turned on or a power supply unit to be turned off in the power supply module according to the charging demand information; Sending an on signal or a off signal to the power branch where the power supply unit to be turned on or the power supply unit to be turned off is located.

14. A computer device comprising a memory, a processor, and a computer program stored in the memory, characterized in that: When the computer program is executed by the processor, the method according to claim 13 is performed.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor of a computer device, the method according to claim 13 is performed.

16. An electric vehicle, characterized in that: A charging system for an electric vehicle comprising any one of claims 1 to 12.

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