Integrated direct current charging pile power distribution method

Abstract

The invention belongs to the technical field of new energy automobiles, and particularly relates to an integrated direct current charging pile power distribution method, which comprises the following steps of: in a charging process, calculating the number of required charging modules of each gun in real time, recording, and comparing with the number of required charging modules recorded last time; according to the method, charging modules needing to be added (charging modules which are used for the least times) are input in real time, or charging modules needing to be reduced are cut out in real time, and the number of the charging modules which are input for charging can be changed in real time according to actual vehicle requirements; therefore, the problem of power waste caused by charging of all modules regardless of the magnitude of current in the prior art is solved, the use times of each charging module can be recorded, the charging modules with less use times are put into use in sequence, and the charging modules with more use times are cut out in sequence. Therefore, the service life of the whole charging module is prolonged by reducing the use frequency of a single charging module.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicles, and in particular relates to an integrated DC charging pile power distribution method. Background Art

[0002] During the charging process of new energy vehicles, the power demand changes in real time. At the beginning of charging, the power demand is relatively large. At this time, the DC charging pile needs to cut in as many charging modules as possible to meet the charging needs of the vehicle. As charging continues, the power demand is getting smaller and no longer requires as many charging modules as before. At this time, the DC charging pile can cut out the excess charging modules and set them idle until the next charging gun is connected to the vehicle for charging, so as to make full use of the charging module resources. The allocation and calling process of the charging module is what we call power allocation.

[0003] Most of the existing integrated DC charging piles are dual-gun free charging. The charging method is: when a single gun is charging, all charging modules charge the gun; when both guns are charging, the modules are charged to each gun. Assuming that there are 2N charging modules, the maximum output power of each charging module is 20kW. Figure 1 (1) As shown, dual-gun charging is as follows Figure 1 (2) as shown.

[0004] Under the existing charging method, as the charging demand power becomes smaller and smaller, since the charging module is not switched out, the output power of each charging module becomes smaller, and the charging efficiency of the charging module becomes lower, which easily causes a waste of electricity. Summary of the invention

[0005] The object of the present invention is to provide an integrated DC charging pile power distribution method, which can fully utilize the charging module regardless of whether the charging power is large or small, so as to maximize the efficiency of the charging module. At the same time, by rotating the charging modules, the overall service life of all charging modules can be extended to solve the problems in the prior art raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an integrated DC charging pile power distribution method, comprising: calculating the vehicle demand power in a single-gun or dual-gun charging mode, wherein the demand power is equal to the demand voltage multiplied by the demand current; calculating the required number of charging modules according to the demand power, the required number of charging modules = demand power / preset maximum power + 1, rounded up; in the initial stage of charging, polling and starting the charging module with the least number of uses, the number of which is the calculated number of required charging modules, and recording the number of times each module is used; during the charging process, the vehicle charging demand is monitored in real time, the number of required charging modules is recalculated, and compared with the previous record; real-time adjustment is made to put in or cut out the charging module, when the demand increases, the module with the least number of uses is put in, and when the demand decreases, the module with the most number of uses is cut out; in the dual-gun charging mode, the required power of the two guns is calculated respectively, and the number of modules required for each is determined accordingly, and if the demand of the rear-starting gun exceeds the number of remaining modules, all remaining modules are enabled; the output voltage and current of each charging module are dynamically set according to the vehicle demand to ensure that the total output power meets the vehicle demand and is reasonably distributed; the number of times all charging modules are used is continuously recorded to ensure that the modules are put in or cut out in the order of the least number of uses to the most number of uses, and the service life is balanced.

[0007] Preferably, when charging with a single gun, the vehicle's required power is calculated based on the vehicle's actual required voltage and current, and the number of charging modules invested is then determined.

[0008] Preferably, in the dual-gun charging mode, the vehicle demand for starting the charging gun first is calculated and met, and the demand for starting the charging gun later is met according to the situation of the remaining modules, or all the remaining modules are enabled.

[0009] Preferably, the on and off operations of the charging module are performed dynamically based on real-time monitoring of vehicle charging demand.

[0010] Preferably, the method further includes: recording the usage history of each charging module, and giving priority to switching out the most frequently used modules in subsequent charging processes.

[0011] Preferably, the method further includes: tracking and recording in real time the changes in the number of modules required by each gun during the charging process.

[0012] Preferably, the output voltage and current settings of the charging module are dynamically adjusted according to the required voltage and current of the vehicle and the number of modules currently put into use.

[0013] Preferably, in the single-gun or dual-gun charging mode, a polling mechanism is adopted to select the charging module with the least number of uses to be charged first.

[0014] Technical effects and advantages of the present invention: Compared with the prior art, the integrated DC charging pile power distribution method proposed in the present invention has the following advantages: The present invention can change the number of charging modules put into charging in real time according to actual vehicle needs, thereby solving the power waste problem caused by all modules being put into charging regardless of the current size in the known prior art. The number of times each charging module is used can be recorded, and charging modules with fewer uses can be put into use in sequence, and charging modules with more uses can be cut out in sequence, thereby solving the problem of extending the overall service life of the charging module by reducing the number of times a single charging module is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the existing charging process of single-gun and double-gun charging; Figure 2 This is a flow chart of the single-gun charging method of the present invention; Figure 3 This is a flow chart of the double-gun charging method of the present invention; Figure 4 The present invention is a flow chart of an integrated DC charging pile power distribution method. DETAILED DESCRIPTION

[0016] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] The present invention provides Figure 4 An integrated DC charging pile power distribution method is shown, comprising: Step 1: Calculate the vehicle power requirement in single-gun or dual-gun charging mode, where the required power is equal to the required voltage multiplied by the required current; Step 2: Calculate the number of charging modules required based on the required power: the number of charging modules required = required power / preset maximum power + 1, round up; Step 3: At the beginning of charging, poll and start the charging module with the least number of times used, the number of which is the calculated number of required charging modules, and record the number of times each module is used; Step 4: Monitor the vehicle charging demand in real time during the charging process, recalculate the number of required charging modules, and compare with the previous records; Step 5: Real-time adjustment of charging modules. When demand increases, the module with the least number of uses is put into use. When demand decreases, the module with the most number of uses is cut out. Step 6: In the dual-gun charging mode, calculate the power requirements of the two guns respectively, and determine the number of modules required for each accordingly. If the demand of the later-starting gun exceeds the number of remaining modules, all remaining modules are enabled; Step 7: The output voltage and current of each charging module are dynamically set according to the vehicle demand to ensure that the total output power meets the vehicle demand and is reasonably distributed; Step 8: Keep a record of the number of times all charging modules are used to ensure that the modules are put in or out in the order of least to most times used to balance their service life.

[0018] Furthermore, when charging with a single gun, the vehicle's required power is calculated based on the vehicle's actual required voltage and current, and the number of charging modules used is then determined.

[0019] Furthermore, in the dual-gun charging mode, by calculating and meeting the vehicle demand of starting the charging gun first, the demand of starting the charging gun later is met according to the situation of the remaining modules, or all the remaining modules are enabled.

[0020] In addition, the opening and closing operations of the charging module are carried out dynamically based on the real-time monitoring of the vehicle charging demand.

[0021] In some other embodiments, the above-mentioned integrated DC charging pile power distribution method also includes: recording the usage history of each charging module, and giving priority to cutting out the most frequently used modules in the subsequent charging process; and tracking and recording the changes in the number of modules required by each gun in real time during the charging process.

[0022] Furthermore, the output voltage and current settings of the charging module are dynamically adjusted according to the vehicle's required voltage and current and the number of modules currently put into operation.

[0023] Furthermore, in the single-gun or dual-gun charging mode, a polling mechanism is adopted to select the charging module with the least number of uses to be put into charging priority.

[0024] The following will further illustrate with reference to specific embodiments. like Figure 2 As shown, Figure 2 It is a flow chart of the single-gun charging method of the present invention.

[0025] In this embodiment, when charging with a single gun, the vehicle power requirement is calculated as required voltage * required current, and then the required number of charging modules is calculated as required power / 20+1, and the integer is taken; the required number of charging modules is polled and turned on (the charging modules with the least number of uses) for charging, and the number of times each charging module has been used is recorded. During the charging process, the vehicle charging demand is obtained in real time, the required number of charging modules is calculated, and the number of times the charging modules that need to be added are recorded in real time (the charging modules with the least number of uses are put into use), or the charging modules that need to be reduced are cut out in real time (the charging modules with the most number of uses are cut out). The number of times the module is used is calculated from the time the charging pile is used.

[0026] like Figure 3 As shown, Figure 3 The figure is a flow chart of the double-gun charging method of the present invention.

[0027] In this embodiment, when charging with two guns, the power requirement 1 of the vehicle whose charging gun is started first = the required voltage 1*required current 1, and the power requirement 2 of the vehicle whose charging gun is started later = the required voltage 2*required current 2. Then, the number of charging modules required for the charging gun started first = the required power 1 / 20+1, and the number of charging modules required for the charging gun started later = the required power 2 / 20+1, and the integers are taken.

[0028] Poll and start (the number of charging modules required is 1) charging modules (the modules that have been used the least since the charging pile was put into use) to charge the charging gun that was started first, and set the output voltage of each charging module to the required voltage 1, and the output current to the required current 1 / the number of charging modules required is 1; poll and start (the number of charging modules required is 2) charging modules (the modules that have been used the least) to charge the charging gun that was started later. If the calculated number of charging modules required is 2 is greater than the number of remaining idle charging modules, start all remaining charging modules to charge the charging gun that was started later, and set the output voltage of each charging module to the required voltage 2, and the output current to the required current 2 / the number of charging modules required is 2.

[0029] During the charging process, the number of charging modules required for each gun is calculated in real time and recorded. The charging modules that need to be added are put into use in real time (the charging modules that have been used the least) or the charging modules that need to be reduced are cut out in real time (the charging modules that have been used the most) .

[0030] The number of times all charging modules are put into use is recorded separately. When they need to be put into use, the charging module with the least number of uses is put into use in sequence; when they need to be switched out, the charging module with the most number of uses is switched out in sequence, so that the overall number of times the charging modules are used is evenly distributed, and the number of times the charging modules are used can be reduced compared to the known prior art, thereby extending the overall service life.

[0031] In summary, the present invention can change the number of charging modules put into charging in real time according to actual vehicle needs, thereby solving the power waste problem caused by all modules being put into charging regardless of the current size in the known prior art. The number of times each charging module is used can be recorded, and the charging modules with fewer uses can be put into use in sequence, and the charging modules with more uses can be cut out in sequence, thereby solving the problem of extending the overall service life of the charging modules by reducing the number of times a single charging module is used.

[0032] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated DC charging pile power distribution method, characterized in that: include: Calculate the vehicle power requirement in single-gun or dual-gun charging mode, where the power requirement is equal to the voltage requirement multiplied by the current requirement; Calculate the required number of charging modules based on the required power: required number of charging modules = required power / preset maximum power + 1, rounded up; At the beginning of charging, poll and open the charging module with the least number of times used, the number of which is the calculated number of required charging modules, and record the number of times each module is used; During the charging process, the vehicle charging demand is monitored in real time, the number of required charging modules is recalculated, and compared with the previous records; Real-time adjustment of charging modules, putting the least used modules into use when demand increases, and cutting out the most used modules when demand decreases; In dual-gun charging mode, the power requirements of the two guns are calculated separately, and the number of modules required for each is determined accordingly. If the power requirements of the later-starting gun exceed the number of remaining modules, all remaining modules are enabled; The output voltage and current of each charging module are dynamically set according to the vehicle's needs to ensure that the total output power meets the vehicle's needs and is reasonably distributed; The number of times all charging modules are used is continuously recorded to ensure that the modules are put into or removed in the order of least to most times used, thus balancing their service life.

2. The integrated DC charging pile power distribution method according to claim 1, characterized in that: When charging with a single gun, the vehicle's required power is calculated based on the vehicle's actual required voltage and current, and the number of charging modules used is then determined.

3. The integrated DC charging pile power distribution method according to claim 1, characterized in that: In dual-gun charging mode, the vehicle needs of the charging gun that is started first are calculated and met, and the needs of the charging gun that is started later are met according to the situation of the remaining modules, or all remaining modules are enabled.

4. The integrated DC charging pile power distribution method according to claim 1, characterized in that: The on and off operations of the charging module are performed dynamically based on the real-time monitoring of the vehicle charging demand.

5. The integrated DC charging pile power distribution method according to claim 1, characterized in that: Also includes: The usage history of each charging module is recorded, and the most frequently used modules are preferentially switched out during subsequent charging.

6. The integrated DC charging pile power distribution method according to claim 5, characterized in that: Also includes: During the charging process, the changes in the number of modules required for each gun are tracked and recorded in real time.

7. The integrated DC charging pile power distribution method according to claim 6, characterized in that: The output voltage and current settings of the charging module are dynamically adjusted according to the vehicle's required voltage and current and the number of modules currently put into use.

8. The integrated DC charging pile power distribution method according to claim 7, characterized in that: In single-gun or dual-gun charging mode, a polling mechanism is used to select the charging module with the least usage times for charging first.

Images