Power distribution method and distribution system for load side of charging pile

Abstract

The invention relates to the technical field of power distribution, in particular to a charging pile load side power distribution system which comprises a charging power calculation module, a vehicle charging judgment module, a vehicle information acquisition module and a charging adjustment module. The distribution judgment unit calculates the sum of the minimum charging power of each charging vehicle, calculates the difference value between the sum of the minimum charging power and the rated power, compares the difference value with the minimum charging power of the to-be-charged vehicle, and judges whether the charging power of the charging vehicle can be reduced for charging the to-be-charged vehicle or not; when the distribution judgment unit judges that the charging power of the charged vehicle can be reduced for charging the to-be-charged vehicle, the charging power of the charging pile is adjusted according to the electric quantity of the charged vehicle and the battery of the to-be-charged vehicle, the charging power is reasonably distributed, energy is utilized more efficiently, and energy waste is avoided.

Description

Technical Field

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

[0002] In recent years, with the increase of environmental awareness and the government's support for the new energy vehicle industry, the number of electric vehicles has grown rapidly. More consumers choose to buy electric vehicles as their daily means of transportation. Whether it is private cars, online ride-hailing vehicles or logistics vehicles, the penetration rate of electric vehicles continues to increase.

[0003] During the charging process of the vehicle, the current charging usually installs a controller at the output end of the charging station. Before the vehicle battery is charged, it is determined whether there will be a load overload during the charging process of the vehicle to prevent the charging station from being overloaded when the vehicle is charging. When the controller determines that there will be an overload, it will suspend the entry of new vehicles into the charging station.

[0004] At the same time, when the vehicle is charging, the charging station usually provides electricity according to the charging power required by the vehicle. However, during the charging process, due to the difference in charging power of each vehicle, when a new vehicle needs to be charged, the charging station detects that the total charging power of the vehicles to be charged is greater than the remaining charging power of the charging station. The controller suspends the new vehicle from entering the charging, resulting in excess charging power in the charging pile. If the charging power in the charging station cannot be reasonably allocated at this time, it will cause a waste of power resources. In view of this, we propose a power distribution method and distribution system on the load side of the charging pile. Summary of the invention

[0005] The object of the present invention is to provide a power distribution method and distribution system on the load side of a charging pile to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides a power distribution system for the load side of a charging pile, comprising a charging power calculation module, a vehicle charging judgment module, a vehicle information acquisition module and a charging adjustment module;

[0007] The charging power calculation module calculates the charging power of the vehicle when it is charging by a power calculation method. The vehicle charging judgment module calculates the used charging power of the charging pile by the sum of the charging powers of each charging station, and compares it with the rated power to determine whether the charging station is overloaded. When the charging station is not overloaded, the difference between the used charging power of the charging station and the rated power is calculated as the remaining charging power of the charging station. When a new vehicle to be charged is added, the vehicle information acquisition module establishes a connection with the vehicle through the charging protocol, obtains the vehicle model and battery power, and obtains the minimum charging power of the vehicle through the network crawler and the vehicle model. The minimum charging power is compared with the remaining charging power calculated by the vehicle charging judgment module to determine whether the vehicle to be charged can be charged, wherein:

[0008] The charging adjustment module includes an allocation judgment unit and a power adjustment unit;

[0009] The allocation judgment unit receives a signal that the vehicle to be charged cannot be charged as judged by the vehicle information acquisition module, calculates the sum of the minimum charging powers of each charged vehicle at the charging station, compares the sum of the minimum charging powers with the rated power of the charging station, and determines whether the charging power of the charged vehicles can be reduced to charge the vehicles to be charged; when the charging power of the charged vehicles cannot be reduced to charge the vehicles to be charged, the waiting time of the vehicles to be charged is calculated according to the battery power of each vehicle in the vehicle information acquisition module and the vehicle charging power corresponding to the charging power calculation module; the power adjustment unit receives a signal that the charging power of the charged vehicles can be reduced to charge the vehicles to be charged, sets different weights according to the battery power of each charged vehicle and the battery power of the vehicles to be charged to reduce the charging power for charging the vehicles to be charged.

[0010] The charging power calculation module is used to calculate the charging power of each charging pile corresponding to the vehicle when the vehicle is charged through the charging pile by a power calculation method;

[0011] First, the voltage and current output by the charging station are detected by the voltage sensor and the current sensor, and the charging power is calculated based on the corresponding relationship between the voltage, current and charging power.

[0012] P = UI;

[0013] Among them, P is the charging power, U is the voltage detected by the voltage sensor, and I is the current detected by the current sensor.

[0014] The vehicle charging judgment module includes a total power calculation unit and an overload judgment unit;

[0015] The total power calculation unit is used to receive the charging power calculated by the charging power calculation module, and calculate the total charging power of the charging station according to the total charging power of the charging piles;

[0016] P 总 =P1+P2,…,P I;

[0017] Among them, P 总 Charging power for the charging station, P1+P2,…,P I Charging power for each charging pile in the charging station;

[0018] The overload judgment unit is used to receive the rated power of the charging station and the charging power calculated by the total power calculation unit. If the charging power is ≥ equal to the rated power, it means that the charging station is overloaded at this time. If the charging power is <rated power, it means that the charging station is not overloaded at this time.

[0019] The overload judgment unit calculates the remaining charging power in the following steps:

[0020] Receive a signal from the overload judgment unit that the charging station is not overloaded, calculate the difference between the rated power and the charging power, and obtain the remaining charging power of the charging station;

[0021] P 剩 =P 额定 -P 总 ;

[0022] Among them, P 剩 is the remaining charging power of the charging station, P 额定 is the rated power of the charging station, P 总 The used charging power calculated for the total power calculation unit.

[0023] When a new vehicle to be charged is added, the vehicle information acquisition module sends a request to obtain the vehicle model and battery power to each vehicle in the charging station through the charging pile. The vehicle management system responds to the request and obtains the vehicle model and battery power in the charging pile. At this time, the web crawler sends a request to the website server containing the vehicle model and the vehicle charging power information. After receiving the web crawler request, the website server feedbacks the request success and failure response. If it fails, the web crawler reselects the website server. If the request is successful, the web crawler obtains the web page content and determines the minimum charging power required for the vehicle to charge.

[0024] The steps of determining whether the vehicle to be charged can be charged in the vehicle information acquisition module are as follows:

[0025] Receiving the remaining charging power of the charging station calculated in the overload judgment unit, if the remaining charging power of the charging station is greater than the minimum charging power of the vehicle to be charged, it means that the vehicle to be charged can be charged; if the remaining charging power of the charging station is less than or equal to the minimum charging power of the vehicle to be charged, it means that the vehicle to be charged cannot be charged;

[0026] After determining whether the vehicle can be charged, the result is fed back to the vehicle to be charged through the connection established with the vehicle.

[0027] The allocation judgment unit is used to receive a signal that the vehicle to be charged cannot be charged as judged by the vehicle information acquisition module, calculate the total minimum charging power of each charged vehicle in the charging station, the difference between the total minimum charging power and the rated power, and compare the difference with the minimum charging power of the vehicle to be charged. If the difference is ≥ the rated power, it means that the charging power of the charged vehicle can be reduced to charge the vehicle to be charged. If the difference is < the rated power, it means that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged.

[0028] The steps of the allocation judgment unit judging the vehicle charging time are as follows:

[0029] The allocation judgment unit receives a signal indicating that the charging power of the charged vehicle cannot be reduced to provide charging power for the vehicle to be charged, and the vehicle information acquisition module acquires the battery power of each charged vehicle, and calculates the charging time of each charged vehicle according to the battery power of each charged vehicle and the corresponding charging power of each charging vehicle calculated by the charging power calculation module;

[0030] Sort the charging time from the shortest to the longest, add the charging power of the vehicle with the shortest time to the remaining charging power calculated by the overload judgment unit, and compare it with the minimum charging power to be charged, to determine whether the vehicle to be charged can be charged after the charging of the vehicle with the shortest time is completed. If it can be charged, the charging time of the vehicle with the shortest time is the waiting time of the vehicle to be charged. If it cannot be charged, output the comparison result to the power adjustment unit to determine whether the charging power of the charged vehicle can be reduced to charge the vehicle to be charged;

[0031] The charging time for each vehicle is: Among them, A I is the battery capacity of the charged vehicle, B I is the charging power of the charged vehicle, and the charging time is sorted from the shortest to the longest as follows: T1<T2<T3<…<T n ;

[0032] The minimum vehicle charging power plus the remaining charging power is: E = F + J; at this time, if E ≥ P E , indicating that after the vehicle with the shortest waiting time is charged, the vehicle to be charged can be charged, P E is the minimum charging power of the vehicle to be charged. At this time, the waiting time of the vehicle to be charged is equal to the charging time of the vehicle with the minimum time. If E<P E , indicating that after the waiting vehicle with the shortest waiting time has completed charging, the vehicle to be charged cannot be charged. At this time, the comparison result is output to the charging power adjustment unit to determine whether the charging power of the charged vehicle can be reduced to charge the vehicle to be charged.

[0033] The power adjustment unit receives a signal that can reduce the charging power of the charged vehicle to provide charging power for the vehicle to be charged, and the vehicle information acquisition module obtains the battery power of each charged vehicle, and sets different weights to reduce the power according to the corresponding battery power of each charged vehicle and the vehicle to be charged;

[0034] The battery power of the i-th charging vehicle is C i (i=1,2,…,n), the battery capacity of the vehicle to be charged is C d ;

[0035] Assume that the charging power reduction weight of the i-th vehicle is The receiving weight of the power to be charged is W d , where W i +W d =1, the remaining charging power of the charging station calculated by the overload judgment unit is the initial charging power P0 to be charged, and the power adjusted by the i-th charging vehicle is P i , the power allocated to the vehicle to be charged is P d ;

[0036] Calculate the total power of all charged vehicles and vehicles to be charged.

[0037] The weight W of the i-th charged vehicle i Equal to the vehicle's charge C i Divide by the total power T, C i is relatively large, which means that the battery power of the vehicle is relatively sufficient, and it bears a relatively large reduction weight in power adjustment. The weight of the vehicle to be charged is C d for: The lower the battery level of the vehicle to be charged, the greater its share in the total weight, so that it can obtain more allocated power;

[0038] When calculating the power adjustment value, first calculate the total power reduction required for all charged vehicles:

[0039] Then calculate the adjusted power P of the i-th charging vehicle i =P0(1-W i ), and then calculate the power P allocated to the vehicle to be charged d =ΔP=P0(1-W d ).

[0040] The power distribution system on the load side of the charging pile includes the following steps:

[0041] Step 1: The charging power detection module detects the charging power of each charging pile in real time;

[0042] Step 2: The total power calculation unit calculates the sum of the charging powers of the charging piles, and the overload judgment unit compares the sum of the charging powers of the charging piles with the rated power to determine whether the charging station is overloaded, and calculates the remaining charging power of the charging station;

[0043] Step 3: The vehicle information acquisition module establishes a connection with the vehicle to obtain the vehicle model and battery power. The web crawler obtains the minimum charging power of the vehicle when charging through the vehicle model, and compares the minimum charging power of the vehicle to be charged with the remaining charging power to determine whether the vehicle to be charged can be charged;

[0044] Step 4: When the vehicle information acquisition module determines that the vehicle to be charged cannot be charged, the allocation judgment unit calculates the sum of the minimum charging powers of each charged vehicle in the charging station, calculates the difference between the sum of the minimum charging powers and the rated power, compares the difference with the minimum charging power of the vehicle to be charged, and determines whether the power of the charged vehicle can be reduced to charge the vehicle to be charged;

[0045] Step 5: When the allocation judgment unit determines that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged, the charging time of each charged vehicle is calculated according to the battery power and charging power of each charged vehicle in the vehicle information acquisition module, and the charging time is sorted. The charging power of the vehicle with the shortest charging time is taken, and the sum of the charging power of the vehicle with the shortest charging time and the remaining charging power is calculated. It is determined whether the vehicle with the shortest charging time can charge the vehicle to be charged after charging is completed. If it can be charged, the charging time of the vehicle with the shortest charging time is the waiting time of the vehicle to be charged.

[0046] Step 6: When the allocation judgment unit judges that the charging power of the charged vehicle can be reduced to charge the vehicle to be charged, the power adjustment unit sets different weights to reduce the power according to the corresponding battery power of each charged vehicle and the vehicle to be charged.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] 1. In the power distribution method and distribution system on the load side of a charging pile, the remaining charging power in the charging station is calculated by the remaining charging power calculation module, and then the vehicle information acquisition module establishes a connection with the vehicle to obtain the minimum charging power of the vehicle to be charged, and the minimum charging power is compared with the remaining charging power of the charging station to determine whether the vehicle to be charged will be overloaded during the charging process, thereby avoiding safety accidents caused by overload, improving the reliability of the charging system, and ensuring the smooth progress of the vehicle charging process.

[0049] 2. In the power distribution method and distribution system on the load side of the charging pile, when the vehicle information acquisition module determines that the charging of the to-be-charged vehicle will be overloaded, the distribution judgment unit calculates the sum of the minimum charging powers of each charging vehicle, and calculates the difference between the sum of the minimum charging powers and the rated power, and compares the difference with the minimum charging power of the to-be-charged vehicle to determine whether the charging power of the charging vehicle can be reduced to charge the to-be-charged vehicle;

[0050] When the allocation judgment unit determines that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged, the charging time is calculated according to the battery power and charging power of each charged vehicle, and the charging power of the vehicle with the shortest charging time is taken, and the sum of the charging power and the remaining power of the charging station is compared with the minimum charging power to be charged, and it is determined whether the vehicle to be charged can be charged after the charging of the vehicle with the shortest waiting time is completed. If it can be charged, the charging time of the vehicle with the shortest waiting time is the waiting time of the vehicle to be charged;

[0051] When the allocation judgment unit determines that the charging power of the charged vehicle can be reduced to charge the vehicle to be charged, the charging power of the charging pile is adjusted according to the battery power of the charged vehicle and the vehicle to be charged, and the charging power is reasonably allocated to make energy more efficiently utilized and avoid energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is the overall module principle diagram of the present invention.

[0053] The meaning of each number in the figure is:

[0054] 100, charging power calculation module; 200, vehicle charging judgment module; 210, total power calculation unit; 220, overload judgment unit; 300, vehicle information acquisition module; 400, charging adjustment module; 410, allocation judgment unit; 420, power adjustment unit. DETAILED DESCRIPTION

[0055] The following will be combined with the accompanying drawings in 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] A power distribution system for a charging pile load side includes a charging power calculation module 100, a vehicle charging judgment module 200, a vehicle information acquisition module 300 and a charging adjustment module 400;

[0057] The charging power calculation module 100 calculates the charging power of the vehicle when it is charging by the power calculation method. The vehicle charging judgment module 200 calculates the used charging power of the charging pile by the sum of the charging power of each charging station, and compares it with the rated power to determine whether the charging station is overloaded. When the charging station is not overloaded, the difference between the used charging power of the charging station and the rated power is calculated as the remaining charging power of the charging station. When a new vehicle to be charged is added, the vehicle information acquisition module 300 establishes a connection with the vehicle through the charging protocol, obtains the vehicle model and battery power, and obtains the minimum charging power of the vehicle through the network crawler and the vehicle model. The minimum charging power is compared with the remaining charging power calculated by the vehicle charging judgment module 200 to determine whether the vehicle to be charged can be charged, wherein:

[0058] The charging adjustment module 400 includes an allocation determination unit 410 and a power adjustment unit 420;

[0059] The allocation judgment unit 410 receives the signal that the vehicle to be charged cannot be charged as judged by the vehicle information acquisition module 300, calculates the sum of the minimum charging powers of each charged vehicle at the charging station, compares the sum of the minimum charging powers with the rated power of the charging station, and determines whether the charging power of the charged vehicles can be reduced to charge the vehicles to be charged. When the charging power of the charged vehicles cannot be reduced to charge the vehicles to be charged, the waiting time of the vehicles to be charged is calculated according to the battery power of each vehicle in the vehicle information acquisition module 300 and the vehicle charging power corresponding to the charging power calculation module 100. The power adjustment unit 420 receives the signal that the charging power of the charged vehicles can be reduced to charge the vehicles to be charged, sets different weights according to the battery power of each charged vehicle and the battery power of the vehicles to be charged to reduce the charging power for charging the vehicles to be charged.

[0060] The charging power calculation module 100 is used to calculate the charging power of each charging pile corresponding to the vehicle when the vehicle is charged through the charging pile by a power calculation method;

[0061] First, the voltage and current output by the charging station are detected by the voltage sensor and the current sensor, and the charging power is calculated based on the corresponding relationship between the voltage, current and charging power.

[0062] P = UI;

[0063] Among them, P is the charging power, U is the voltage detected by the voltage sensor, and I is the current detected by the current sensor.

[0064] The vehicle charging determination module 200 includes a total power calculation unit 210 and an overload determination unit 220;

[0065] The total power calculation unit 210 is used to receive the charging power calculated by the charging power calculation module 100, and calculate the total charging power of the charging station according to the total charging power of the charging piles;

[0066] P 总 =P1+P2,…,P I ;

[0067] Among them, P 总 Charging power for the charging station, P1+P2,…,P I Charging power for each charging pile in the charging station;

[0068] The overload judgment unit 220 is used to receive the rated power of the charging station and the charging power calculated by the total power calculation unit 210. If the charging power is ≥ equal to the rated power, it means that the charging station is overloaded at this time. If the charging power is <rated power, it means that the charging station is not overloaded at this time.

[0069] The overload determination unit 220 calculates the remaining charging power in the following steps:

[0070] Receiving a signal from the overload judgment unit 220 that the charging station is not overloaded, calculating the difference between the rated power and the charging power, and obtaining the remaining charging power of the charging station;

[0071] P 剩 =P 额定 -P 总 ;

[0072] Among them, P 剩 is the remaining charging power of the charging station, P 额定 is the rated power of the charging station, P 总 The used charging power is calculated by the total power calculation unit 210 .

[0073] When a new vehicle to be charged is added, the vehicle information acquisition module 300 sends a request to obtain the vehicle model and battery power to each vehicle in the charging station through the charging pile. The vehicle management system responds to the request and obtains the vehicle model and battery power in the charging pile. At this time, the web crawler sends a request to the website server containing the vehicle model and the vehicle charging power information. After receiving the web crawler request, the website server feedbacks the request success and failure response. If it fails, the web crawler reselects the website server. If the request is successful, the web crawler obtains the web page content and determines the minimum charging power required for the vehicle to charge.

[0074] The steps of determining whether the vehicle to be charged can be charged in the vehicle information acquisition module 300 are as follows:

[0075] Receiving the remaining charging power of the charging station calculated by the overload judgment unit 220, if the remaining charging power of the charging station is greater than the minimum charging power of the vehicle to be charged, it means that the vehicle to be charged can be charged; if the remaining charging power of the charging station is less than or equal to the minimum charging power of the vehicle to be charged, it means that the vehicle to be charged cannot be charged;

[0076] After determining whether the vehicle can be charged, the result is fed back to the vehicle to be charged through the connection established with the vehicle.

[0077] The allocation judgment unit 410 is used to receive the signal that the vehicle to be charged cannot be charged determined by the vehicle information acquisition module 300, calculate the total minimum charging power of each charged vehicle in the charging station, the difference between the total minimum charging power and the rated power, and compare the difference with the minimum charging power of the vehicle to be charged. If the difference is ≥ the rated power, it means that the charging power of the charged vehicle can be reduced for charging the vehicle to be charged. If the difference is < the rated power, it means that the charging power of the charged vehicle cannot be reduced for charging the vehicle to be charged.

[0078] The allocation determination unit 410 determines the vehicle charging time in the following steps:

[0079] The receiving allocation judgment unit 410 cannot reduce the charging power of the charged vehicle to provide a charging signal to the to-be-charged vehicle, the vehicle information acquisition module 300 acquires the battery power of each charged vehicle, and calculates the charging time of each charged vehicle according to the battery power of each charged vehicle and the corresponding charging power of each charging vehicle calculated by the charging power calculation module 100;

[0080] Sort the charging time from the shortest to the longest, add the charging power of the vehicle with the shortest time to the remaining charging power calculated by the overload judgment unit 220, and compare it with the minimum charging power to be charged, and judge whether the vehicle to be charged can be charged after the charging of the vehicle with the shortest time is completed. If it can be charged, the charging time of the vehicle with the shortest time is the waiting time of the vehicle to be charged. If it cannot be charged, output the comparison result to the power adjustment unit 420 to judge whether the charging power of the charged vehicle can be reduced to charge the vehicle to be charged;

[0081] The charging time for each vehicle is: Among them, A I is the battery capacity of the charged vehicle, B I is the charging power of the charged vehicle, and the charging time is sorted from the shortest to the longest as follows: T1<T2<T3<…<T n ;

[0082] The minimum vehicle charging power plus the remaining charging power is: E = F + J; at this time, if E ≥ P E , indicating that after the vehicle with the shortest waiting time is charged, the vehicle to be charged can be charged, P E is the minimum charging power of the vehicle to be charged. At this time, the waiting time of the vehicle to be charged is equal to the charging time of the vehicle with the minimum time. If E<P E , indicating that after the waiting vehicle with the shortest waiting time has been charged, the vehicle to be charged cannot be charged. At this time, the comparison result is output to the charging power adjustment unit 420 to determine whether the charging power of the charged vehicle can be reduced to charge the vehicle to be charged.

[0083] The power adjustment unit 420 receives a signal that can reduce the charging power of the charged vehicle to provide charging power for the vehicle to be charged. The vehicle information acquisition module 300 obtains the battery power of each charged vehicle and sets different weights to reduce the power according to the corresponding battery power of each charged vehicle and the vehicle to be charged;

[0084] The battery power of the i-th charging vehicle is C i (i=1,2,…,n), the battery capacity of the vehicle to be charged is C d ;

[0085] Assume that the charging power reduction weight of the i-th vehicle is The receiving weight of the power to be charged is W d , where W i +W d =1, the remaining charging power of the charging station calculated by the overload judgment unit 220 is the initial charging power P0 to be charged, and the power adjusted by the i-th charging vehicle is P i , the power allocated to the vehicle to be charged is P d ;

[0086] Calculate the total power of all charged vehicles and vehicles to be charged.

[0087] The weight W of the i-th charged vehicle i Equal to the vehicle's charge C i Divide by the total power T, C i is relatively large, which means that the battery power of the vehicle is relatively sufficient, and it bears a relatively large reduction weight in power adjustment. The weight of the vehicle to be charged is C d for: The lower the battery level of the vehicle to be charged, the greater its share in the total weight, so that it can obtain more allocated power;

[0088] When calculating the power adjustment value, first calculate the total power reduction required for all charged vehicles:

[0089] Then calculate the adjusted power P of the i-th charging vehicle i =P0(1-W i ), and then calculate the power P allocated to the vehicle to be charged d =ΔP=P0(1-W d ).

[0090] The power distribution system on the load side of the charging pile includes the following steps:

[0091] Step 1: The charging power detection module 100 detects the charging power of each charging pile in real time;

[0092] Step 2: The total power calculation unit 210 calculates the sum of the charging powers of the charging piles, and the overload judgment unit 220 compares the sum of the charging powers of the charging piles with the rated power to determine whether the charging station is overloaded, and calculates the remaining charging power of the charging station;

[0093] Step 3: The vehicle information acquisition module 300 establishes a connection with the vehicle to obtain the vehicle model and battery power. The web crawler obtains the minimum charging power of the vehicle when charging through the vehicle model, and compares the minimum charging power of the vehicle to be charged with the remaining charging power to determine whether the vehicle to be charged can be charged;

[0094] Step 4: When the vehicle information acquisition module 300 determines that the vehicle to be charged cannot be charged, the allocation judgment unit 410 calculates the sum of the minimum charging powers of each charged vehicle in the charging station, calculates the difference between the sum of the minimum charging powers and the rated power, compares the difference with the minimum charging power of the vehicle to be charged, and determines whether the power of the charged vehicle can be reduced to charge the vehicle to be charged;

[0095] Step 5: When the allocation judgment unit 410 judges that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged, the charging time of each charged vehicle is calculated according to the battery power and charging power of each charged vehicle in the vehicle information acquisition module 300, and the charging time is sorted, the charging power of the vehicle with the minimum charging time is taken, and the sum of the charging power of the vehicle with the minimum charging time and the remaining charging power is calculated, and it is judged whether the vehicle with the minimum charging time can charge the vehicle to be charged after charging is completed. If it can be charged, the charging time of the vehicle with the minimum charging time is the waiting time of the vehicle to be charged;

[0096] Step 6: When the allocation determination unit 410 determines that the charging power of the charged vehicle can be reduced to charge the vehicle to be charged, the power adjustment unit 420 sets different weights to reduce the power according to the corresponding battery power of each charged vehicle and the vehicle to be charged.

[0097] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A power distribution system on the load side of a charging pile, characterized in that: It comprises a charging power calculation module (100), a vehicle charging determination module (200), a vehicle information acquisition module (300) and a charging adjustment module (400); The charging power calculation module (100) calculates the charging power of the vehicle when it is charging by a power calculation method. The vehicle charging judgment module (200) calculates the charging power used by the charging pile by the sum of the charging powers of each charging station, compares it with the rated power, and judges whether the charging station is overloaded. When the charging station is not overloaded, the difference between the charging power used by the charging station and the rated power is calculated as the remaining charging power of the charging station. When a new vehicle to be charged is added, the vehicle information acquisition module (300) establishes a connection with the vehicle through a charging protocol, obtains the vehicle model and battery power, and obtains the minimum charging power of the vehicle through a network crawler and the vehicle model. The minimum charging power is compared with the remaining charging power calculated by the vehicle charging judgment module (200) to judge whether the vehicle to be charged can be charged, wherein: The charging adjustment module (400) comprises an allocation determination unit (410) and a power adjustment unit (420); The allocation judgment unit (410) receives a signal from the vehicle information acquisition module (300) that the vehicle to be charged cannot be charged, calculates the sum of the minimum charging powers of each charged vehicle at the charging station, compares the sum of the minimum charging powers with the rated power of the charging station, and judges whether the charging power of the charged vehicles can be reduced to charge the vehicle to be charged. When the charging power of the charged vehicles cannot be reduced to charge the vehicle to be charged, the waiting time of the vehicle to be charged is calculated according to the battery power of each vehicle in the vehicle information acquisition module (300) and the vehicle charging power corresponding to the charging power calculation module (100). The power adjustment unit (420) receives a signal that the charging power of the charged vehicles can be reduced to charge the vehicle to be charged, and sets different weights according to the battery power of each charged vehicle and the battery power of the vehicle to be charged to reduce the charging power for charging the vehicle to be charged.

2. The power distribution system for the charging pile load side according to claim 1, characterized in that: The charging power calculation module (100) is used to calculate the charging power of each charging pile corresponding to the vehicle when the vehicle is charged through the charging pile by using a power calculation method.

3. The power distribution system on the load side of the charging pile according to claim 2, characterized in that: The vehicle charging judgment module (200) comprises a total power calculation unit (210) and an overload judgment unit (220); The total power calculation unit (210) is used to receive the charging power calculated by the charging power calculation module (100), and calculate the total charging power of the charging station according to the total charging power of the charging piles; The overload judgment unit (220) is used to receive the rated power of the charging station and the charging power calculated by the total power calculation unit (210); if the charging power is ≥ or equal to the rated power, it means that the charging station is overloaded at this time; if the charging power is < the rated power, it means that the charging station is not overloaded at this time.

4. The power distribution system for the load side of the charging pile according to claim 3, characterized in that: The overload judgment unit (220) calculates the remaining charging power in the following steps: The charging station is not overloaded and a signal is received, and the difference between the rated power and the charging power is calculated to obtain the remaining charging power of the charging station.

5. The power distribution system for the charging pile load side according to claim 4, characterized in that: When a new vehicle to be charged is added, the vehicle information acquisition module (300) sends a request to obtain the vehicle model and battery power to each vehicle in the charging station through the charging pile. The vehicle management system responds to the request and obtains the vehicle model and battery power in the charging pile. At this time, the web crawler sends a request to a website server containing the vehicle model and the vehicle charging power information. After receiving the web crawler request, the website server feeds back a response of success or failure of the request. In case of failure, the web crawler reselects the website server. After the request is successful, the web crawler obtains the web page content and determines the minimum charging power required for the vehicle to be charged.

6. The power distribution system on the load side of the charging pile according to claim 5, characterized in that: The steps of judging whether the vehicle to be charged can be charged in the vehicle information acquisition module (300) are as follows: Receiving the remaining charging power of the charging station calculated in the overload judgment unit (220), if the remaining charging power of the charging station is greater than the minimum charging power of the vehicle to be charged, it means that the vehicle to be charged can be charged; if the remaining charging power of the charging station is less than or equal to the minimum charging power of the vehicle to be charged, it means that the vehicle to be charged cannot be charged; After determining whether the vehicle can be charged, the result is fed back to the vehicle to be charged through the connection established with the vehicle.

7. The power distribution system on the load side of the charging pile according to claim 6, characterized in that: The allocation judgment unit (410) is used to receive a signal that the to-be-charged vehicle cannot be charged as judged by the vehicle information acquisition module (300), calculate the sum of the minimum charging powers of each charged vehicle in the charging station, the difference between the sum of the minimum charging powers and the rated power, and compare the difference with the minimum charging power of the to-be-charged vehicle. If the difference is ≥ the rated power, it means that the charging power of the charged vehicle can be reduced to charge the to-be-charged vehicle; if the difference is < the rated power, it means that the charging power of the charged vehicle cannot be reduced to charge the to-be-charged vehicle.

8. The power distribution system for the load side of the charging pile according to claim 6, characterized in that: The allocation determination unit (410) determines the vehicle charging time in the following steps: The allocation judgment unit (410) receives a signal indicating that the charging power of the charged vehicle cannot be reduced to provide charging power for the vehicle to be charged, the vehicle information acquisition module (300) acquires the battery power of each charged vehicle, and calculates the charging time of each charged vehicle based on the battery power of each charged vehicle and the corresponding charging power of each charged vehicle calculated by the charging power calculation module (100); The charging time is sorted from the shortest to the longest, the charging power of the vehicle with the shortest time is added to the remaining charging power calculated by the overload judgment unit (220), and the sum is compared with the minimum charging power to be charged, and it is determined whether the vehicle to be charged can be charged after the charging of the vehicle with the shortest time is completed. If it can be charged, the charging time of the vehicle with the shortest time is the waiting time of the vehicle to be charged. If it cannot be charged, the comparison result is output to the power adjustment unit (420) to determine whether the charging power of the charged vehicle can be reduced to charge the vehicle to be charged.

9. The power distribution system for the load side of the charging pile according to claim 8, characterized in that: The power adjustment unit (420) receives a signal that can reduce the charging power of a charged vehicle to provide charging power for a vehicle to be charged, and the vehicle information acquisition module (300) acquires the battery power of each charged vehicle and sets different weights to reduce the power according to the corresponding battery power of each charged vehicle and vehicle to be charged; The battery power of the i-th charging vehicle is C i (i=1,2,…,n), the battery capacity of the vehicle to be charged is C d ; Assume that the charging power reduction weight of the i-th vehicle is The receiving weight of the power to be charged is W d , where W i +W d =1, the remaining charging power of the charging station calculated by the overload judgment unit (220) is the initial charging power P0 to be charged, and the power adjusted by the i-th charging vehicle is P i , the power allocated to the vehicle to be charged is P d ; Calculate the total power of all charged vehicles and vehicles to be charged. The weight W of the i-th charged vehicle i Equal to the vehicle's charge C i Divide by the total power T, C i Relatively large, which means that the battery power of the vehicle is sufficient, and it bears a relatively large reduction weight in power adjustment. The weight of the vehicle to be charged is C d for: The lower the battery level of the vehicle to be charged, the greater its share in the total weight, so that it can obtain more allocated power; When calculating the power adjustment value, first calculate the total power reduction required for all charged vehicles: Then calculate the adjusted power P of the i-th charging vehicle i =P0(1-W i ), and then calculate the power P allocated to the vehicle to be charged d =ΔP=P0(1-W d ).

10. A method for implementing power distribution on the load side of a charging pile, applied to the power distribution system on the load side of a charging pile as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: The charging power detection module (100) detects the charging power of each charging pile in real time; Step 2: The total power calculation unit (210) calculates the sum of the charging powers of the charging piles, and the overload judgment unit (220) compares the sum of the charging powers of the charging piles with the rated power to judge whether the charging station is overloaded, and calculates the remaining charging power of the charging station; Step 3: The vehicle information acquisition module (300) establishes a connection with the vehicle to obtain the vehicle model and battery power. The web crawler obtains the minimum charging power of the vehicle when charging through the vehicle model, and compares the minimum charging power of the vehicle to be charged with the remaining charging power to determine whether the vehicle to be charged can be charged. Step 4: When the vehicle information acquisition module (300) determines that the vehicle to be charged cannot be charged, the allocation judgment unit (410) calculates the sum of the minimum charging powers of each charged vehicle in the charging station, calculates the difference between the sum of the minimum charging powers and the rated power, compares the difference with the minimum charging power of the vehicle to be charged, and determines whether the power of the charged vehicle can be reduced to charge the vehicle to be charged; Step 5: When the allocation judgment unit (410) judges that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged, the charging time of each charged vehicle is calculated according to the battery power and charging power of each charged vehicle in the vehicle information acquisition module (300), and the charging time is sorted, the charging power of the vehicle with the minimum charging time is obtained, and the sum of the charging power of the vehicle with the minimum charging time and the remaining charging power is calculated, and it is judged whether the vehicle with the minimum charging time can charge the vehicle to be charged after charging is completed. If charging is possible, the charging time of the vehicle with the minimum charging time is the waiting time of the vehicle to be charged; Step 6: When the allocation judgment unit (410) judges that the charging power of the charged vehicle can be reduced to charge the vehicle to be charged, the power adjustment unit (420) sets different weights to reduce the power according to the corresponding battery power of each charged vehicle and the vehicle to be charged.

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