A power distribution method and system for the load side of a charging pile

Abstract

The present invention relates to the technical field of power distribution, and specifically, to a power distribution system on the load side of a charging pile, including a charging power calculation module, a vehicle charging judgment module, a vehicle information acquisition module, and a charging adjustment module. When the vehicle information acquisition module determines that overload will occur during the charging of the vehicle to be charged, the distribution judgment unit calculates the sum of the minimum charging powers of each charged vehicle, 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 charging power of the charged vehicle can be reduced to charge the vehicle to be charged. When the distribution 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 distributed to make more efficient use of energy and avoid waste of energy.

Description

Technical Field

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

[0002] In recent years, with the enhancement of environmental awareness and the support of the government for the new energy vehicle industry, the ownership of electric vehicles has increased rapidly. More consumers choose to buy electric vehicles as their daily travel tools. Whether in the fields of private cars, online car-hailing, or logistics vehicles, the penetration rate of electric vehicles is constantly increasing.

[0003] During the charging process of a vehicle, currently, a controller is usually installed at the output end of the charging station. Before the vehicle battery is charged, it is judged whether there will be a load overload during the vehicle charging process to prevent the charging station from being overloaded when the vehicle is charging. When the controller judges that an overload situation will occur, new vehicles will be suspended from entering the charging.

[0004] Meanwhile, when the vehicle is charging, the charging station usually provides power according to the charging power required by the vehicle. However, during the charging process, due to the difference in the charging power of each vehicle, when a new vehicle needs to be charged and 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 will suspend new vehicles from entering the charging, resulting in a situation where there is remaining charging power in the charging pile. At this time, if the charging power in the charging station cannot be reasonably distributed, it will cause a waste of electric power resources. In view of this, we propose a power distribution method and system on the load side of a charging pile. Summary of the Invention

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

[0006] To achieve the above object, the present invention provides a power distribution system on the load side of a charging pile, including 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 during vehicle charging through the power calculation method. The vehicle charging judgment module calculates the used charging power of the charging pile by summing up the charging powers of each charging station, compares it with the rated power to determine whether there is an overload situation at the charging station. When the charging station is not overloaded, it calculates the difference between the used charging power of the charging station and the rated power 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 web crawlers and the vehicle model. It compares the minimum charging power with the remaining charging power calculated by the vehicle charging judgment module to determine whether the vehicle to be charged can be charged. Among them:

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

[0009] The distribution judgment unit receives the signal that the vehicle to be charged cannot be charged judged by the vehicle information acquisition module, calculates the total sum of the minimum charging powers of each charged vehicle at the charging station, compares the total sum of the minimum charging powers with the rated power of the charging station to determine whether the charging power of the charged vehicle can be reduced to charge the vehicle to be charged. When the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged, it calculates the waiting time of the vehicle to be charged 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 the signal that the charging power of the charged vehicle can be reduced to charge the vehicle to be charged, and sets different weights according to the battery powers 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.

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

[0011] First, it detects the voltage and current output by the charging station through a voltage sensor and a current sensor, and calculates the charging power according to the corresponding relationship between 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 sum of the charging powers of the charging piles;

[0016] P 总 = P1 + P2,..., P I;

[0017] Among them, P 总 is the charging power of the charging station, P1 + P2, …, P I are the charging powers of each charging pile in the charging station;

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

[0019] The steps for the overload judgment unit to calculate the remaining charging power are as follows:

[0020] Receive the signal that the charging station is not overloaded in the overload judgment unit, 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, and P 总 is the charging power used calculated by the total power calculation unit.

[0023] When a new vehicle to be charged is added, the vehicle information acquisition module sends requests for obtaining the vehicle model and battery power to each vehicle in the charging station through the charging pile. The vehicle management system responds to the requests and obtains the vehicle model and battery power in the charging pile. At this time, the web crawler sends requests to the website server containing the vehicle model and the website server containing the vehicle charging power information. After receiving the requests from the web crawler, the website server sends success and failure responses. When it fails, 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 when the vehicle is charging.

[0024] The steps for the vehicle information acquisition module to judge whether the vehicle to be charged can be charged are as follows:

[0025] Receive the remaining charging power of the charging station calculated in the overload judgment unit. If the remaining charging power of the charging station > 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 ≤ the minimum charging power of the vehicle to be charged, it means that the vehicle to be charged cannot be charged;

[0026] After judging whether the vehicle can be charged, feedback the result to the vehicle to be charged through the connection established with the vehicle.

[0027] The allocation judgment unit is used to receive the signal that the vehicle to be charged cannot be charged 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 ≥ 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 < 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 for the allocation judgment unit to judge the vehicle charging time are as follows:

[0029] Receive the signal that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged by the allocation judgment unit. The vehicle information acquisition module obtains the battery power of each charged vehicle, calculates the corresponding charging power of each charged vehicle according to the battery power of each charged vehicle and the charging power calculation module, and calculates the charging time of each charged vehicle;

[0030] Sort the charging times from the smallest to the largest. Add the charging power of the vehicle with the smallest time to the remaining charging power calculated by the overload judgment unit, and compare it with the minimum charging power of the vehicle to be charged. Judge whether the vehicle to be charged can be charged after waiting for the vehicle with the smallest charging time to finish charging. If it can be charged, the charging time of the vehicle with the smallest 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 judge whether the charging power of the charged vehicle can be reduced to charge the vehicle to be charged;

[0031] The charging time of each vehicle is: Among them, A I is the battery power of the charged vehicle, B I is the charging power of the charged vehicle. Sort the charging times from the smallest to the largest as: T1 < T2 < T3 < … < T n ;

[0032] The sum of the minimum vehicle charging power and the remaining charging power is: E = F + J; At this time, if E ≥ P E , it means that after waiting for the vehicle with the smallest charging time to finish charging, 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 smallest time; if E < P E , it means that after waiting for the vehicle with the smallest charging time to finish charging, the vehicle to be charged cannot be charged. At this time, output the comparison result to the charging power adjustment unit to judge 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 for reducing the charging power of a charged vehicle to charge a to-be-charged vehicle. The vehicle information acquisition module acquires the battery power of each charged vehicle and sets different weights to reduce the power according to the battery powers of each charged vehicle and the to-be-charged vehicle.

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

[0035] Let the weight for reducing the charging power of the i-th vehicle be The weight for receiving the to-be-charged power 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 for the to-be-charged vehicle. Let the power adjusted for the i-th charged vehicle be P i , and the power allocated to the to-be-charged vehicle is P d ;

[0036] Calculate the total power of all charged vehicles and the to-be-charged vehicle,

[0037] For the weight W i of the i-th charged vehicle, it is equal to the power C i of this vehicle divided by the total power T, C i being relatively large means that the battery power of this vehicle is relatively sufficient, and it undertakes a relatively large weight reduction in power adjustment. The weight C d of the to-be-charged vehicle is: It means that the lower the power of the to-be-charged vehicle, the larger its proportion in the total weight, so as to obtain more allocated power;

[0038] When calculating the power adjustment value, first calculate the total power that all charged vehicles need to reduce:

[0039] Then calculate the power P i adjusted for the i-th charged vehicle = P0(1 - W i ), and then calculate the power P d allocated to the to-be-charged vehicle = 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 each charging pile. The overload judgment unit compares the sum of the charging powers of the charging piles with the rated power to determine whether there is an overload in the charging station 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 during vehicle charging based on 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, and compares the difference with the minimum charging power of the vehicle to be charged to determine 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, based on the battery power and charging power of each charged vehicle in the vehicle information acquisition module, calculates the charging time of each charged vehicle, sorts the charging times, takes the charging power of the vehicle with the minimum charging time, calculates the sum of the charging power of the vehicle with the minimum charging time and the remaining charging power, and determines whether the vehicle with the minimum charging time can charge the vehicle to be charged after charging is completed. If it can charge, the charging time of the vehicle with the minimum charging time at this time is the waiting time of the vehicle to be charged.

[0046] Step 6: 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 power adjustment unit reduces the power according to the different weights set by the corresponding battery powers of each charged vehicle and the vehicle to be charged.

[0047] Compared with the prior art, the beneficial effects of the present invention are:

[0048] 1. In this method and system for power distribution on the load side of a charging pile, the remaining charging power calculation module calculates the remaining charging power in the charging station. 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 compares the minimum charging power with the remaining charging power of the charging station to determine whether there will be an overload situation during the charging process of the vehicle to be charged, 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 system on the load side of a charging pile, when the vehicle information acquisition module determines that overloading will occur during the charging of the vehicle to be charged, the distribution judgment unit calculates the sum of the minimum charging powers of each charged vehicle, 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 charging power of the charged vehicle can be reduced to charge the vehicle to be charged;

[0050] When the distribution judgment unit determines that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged, it calculates the charging time according to the battery power and charging power of each charged vehicle, takes the charging power of the vehicle with the shortest charging duration, sums it with the remaining power of the charging station and compares it with the minimum charging power of the vehicle to be charged, and determines whether the vehicle to be charged can be charged after waiting for the vehicle with the shortest waiting time to finish charging. 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;

[0051] When the distribution judgment unit determines that the charging power of the charged vehicle can be reduced to charge the vehicle to be charged, it adjusts the charging power of the charging pile according to the battery powers of the charged vehicle and the vehicle to be charged, reasonably distributes the charging power to make more efficient use of energy and avoid waste of energy. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0053] The meanings of the reference numerals in the figure are as follows:

[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, distribution judgment unit; 420, power adjustment unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0055] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0056] A power distribution system on the load side of a charging pile 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 during vehicle charging through the power calculation method. The vehicle charging judgment module 200 calculates the used charging power of the charging piles by summing up the charging powers of each charging station, compares it with the rated power, and determines whether there is an overload situation at the charging station. When the charging station is not overloaded, it calculates the difference between the used charging power of the charging station and the rated power 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 web crawlers and the vehicle model. It compares the minimum charging power with the remaining charging power calculated by the vehicle charging judgment module 200 to determine whether the vehicle to be charged can be charged. Among them:

[0058] The charging adjustment module 400 includes a distribution judgment unit 410 and a power adjustment unit 420;

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

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

[0061] First, it detects the voltage and current output by the charging station through a voltage sensor and a current sensor, and calculates the charging power according to the corresponding relationship between 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 judgment module 200 includes a total power calculation unit 210 and an overload judgment 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 sum of the charging powers of the charging piles;

[0066] P 总 = P1 + P2, …, P I ;

[0067] Wherein, P 总 is the charging power of the charging station, and P1 + P2, …, P I are the charging powers of 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 ≥ the rated power, it means that the charging station is overloaded at this time. If the charging power < the rated power, it means that the charging station is not overloaded at this time.

[0069] The steps for the overload judgment unit 220 to calculate the remaining charging power are as follows:

[0070] Receive the signal that the charging station is not overloaded in the overload judgment unit 220, calculate the difference between the rated power and the charging power, and obtain the remaining charging power of the charging station;

[0071] P 剩 = P 额定 - P 总 ;

[0072] Wherein, P 剩 is the remaining charging power of the charging station, P 额定 is the rated power of the charging station, and P 总 is the charging power used 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 requests for obtaining vehicle models and battery power to each vehicle in the charging station through the charging piles. The vehicle management system responds to the requests and obtains the vehicle models and battery power in the charging piles. At this time, the web crawler sends requests to the website server that contains vehicle models and vehicle charging power information. After receiving the requests from the web crawler, the website server feeds back success and failure responses. When it fails, 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 when the vehicle is charging.

[0074] The steps for the vehicle information acquisition module 300 to judge whether a vehicle to be charged can be charged are as follows:

[0075] Receive the remaining charging power of the charging station calculated in the overload judgment unit 220. If the remaining charging power of the charging station > 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 ≤ the minimum charging power of the vehicle to be charged, it means that the vehicle to be charged cannot be charged;

[0076] Determine whether the vehicle can be charged and feedback the result to the vehicle to be charged through the established connection with the vehicle.

[0077] The allocation judgment unit 410 is used to receive the signal that the vehicle to be charged cannot be charged judged 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, compare the difference with the minimum charging power of the vehicle to be charged. If the difference ≥ 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 < the rated power, it means that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged.

[0078] The allocation judgment unit 410 judges the charging time of the vehicle as follows:

[0079] Receive the signal that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged from the allocation judgment unit 410. The vehicle information acquisition module 300 obtains the battery power of each charged vehicle, calculates the corresponding charging power of each charged vehicle according to the battery power of each charged vehicle and the charging power calculation module 100, and calculates the charging time of each charged vehicle;

[0080] Sort the charging times from the smallest to the largest. Add the charging power of the vehicle with the smallest time to the remaining charging power calculated by the overload judgment unit 220, and compare it with the minimum charging power of the vehicle to be charged. Judge whether the vehicle to be charged can be charged after waiting for the vehicle with the smallest time to finish charging. If it can be charged, the charging time of the vehicle with the smallest 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 of each vehicle is: Among them, A I is the battery power of the charged vehicle, B I is the charging power of the charged vehicle. Sort the charging times from the smallest to the largest as: T1 < T2 < T3 < … < T n ;

[0082] The sum of the minimum vehicle charging power and the remaining charging power is: E = F + J; at this time, if E ≥ P E , it means that after waiting for the vehicle with the smallest time to finish charging, 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 smallest time; if E < P E , it means that after waiting for the vehicle with the smallest time to finish charging, the vehicle to be charged cannot be charged. At this time, output the comparison result to the charging power adjustment unit 420 to judge 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 for reducing the charging power of the charged vehicle to charge the vehicle to be charged. 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 powers of each charged vehicle and the vehicle to be charged;

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

[0085] Let the weight for reducing the charging power of the i-th vehicle be The weight for receiving 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. Let the power adjusted by the i-th charged vehicle be P i , and the power allocated to the vehicle to be charged is P d ;

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

[0087] For the weight W i of the i-th charged vehicle, it is equal to the power C i of the vehicle divided 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 weight reduction in power adjustment. The weight C d of the vehicle to be charged is: It means that the lower the power of the vehicle to be charged, the larger its proportion in the total weight, so as to obtain more allocated power;

[0088] When calculating the power adjustment value, first calculate the total power that all charged vehicles need to reduce:

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

[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 each charging pile. 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 during vehicle charging based on 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, and compares the difference with the minimum charging power of the vehicle to be charged to determine whether the charging power of the charged vehicle can be reduced to charge the vehicle to be charged.

[0095] Step 5: When the allocation judgment unit 410 determines that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged, it calculates the charging time of each charged vehicle based on the battery power and charging power of each charged vehicle in the vehicle information acquisition module 300, sorts the charging times, selects the charging power of the vehicle with the minimum charging time, calculates the sum of the charging power of the vehicle with the minimum charging time and the remaining charging power, and determines whether the vehicle with the minimum charging time can charge the vehicle to be charged after charging is completed. If it can charge, the charging time of the vehicle with the minimum charging time at this time is the waiting time of the vehicle to be charged.

[0096] Step 6: When the allocation judgment 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 powers 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 in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A power distribution system on the load side of a charging pile, characterized in that It 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); The charging power calculation module (100) calculates the charging power during vehicle charging through a power calculation method. The vehicle charging judgment module (200) calculates the used charging power of the charging pile by summing up the charging powers of each charging station, compares it with the rated power to determine whether there is an overload situation at the charging station. When the charging station is not overloaded, it calculates the difference between the used charging power of the charging station and the rated power 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 web crawlers and the vehicle model. It compares the minimum charging power with the remaining charging power calculated by the vehicle charging judgment module (200) to determine whether the vehicle to be charged can be charged. Among them: The charging adjustment module (400) includes a distribution judgment unit (410) and a power adjustment unit (420); The distribution judgment unit (410) receives the signal that the vehicle to be charged cannot be charged judged by the vehicle information acquisition module (300), calculates the total minimum charging power of each charged vehicle at the charging station, compares the total minimum charging power with the rated power of the charging station to determine whether the charging power of the charged vehicle can be reduced to charge the vehicle to be charged. When the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged, it calculates the waiting time of the vehicle to be charged 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 vehicle 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 the vehicle to be charged; The steps for the distribution judgment unit (410) to judge the vehicle charging time are as follows: Receiving the signal that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged by the distribution judgment unit (410), the vehicle information acquisition module (300) obtains the battery power of each charged vehicle, calculates the corresponding charging power of each charged vehicle according to the battery power of each charged vehicle and the charging power calculation module (100), and calculates the charging time of each charged vehicle; Sort the charging times from the shortest to the longest. Add the charging power of the vehicle with the shortest charging time to the remaining charging power calculated by the overload judgment unit (220), and compare it with the minimum charging power of the vehicle to be charged to determine whether the vehicle to be charged can be charged after waiting for the vehicle with the shortest charging time to finish charging. 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. If it cannot be charged, output the comparison result 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; The power adjustment unit (420) receives a signal for reducing the charging power of a charged vehicle to charge a vehicle to be charged. 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 battery powers of the charged vehicles and the vehicle to be charged. Receive the battery power of the first charging vehicle is ; the battery power of the vehicle to be charged is Let the charging power reduction weight of the $i$-th vehicle be , and the received weight of the power to be charged be , where , the remaining charging power of the charging station calculated by the overload judgment unit (220) is the initial charging power to be charged , let the power adjusted by the $i$-th charging vehicle be , and the power allocated to the vehicle to be charged be ; Calculate the total power of all charged vehicles and vehicles to be charged, ; For the weight of the nth charged vehicle equals the electricity quantity of the vehicle divided by the total electricity quantity , relatively large, meaning that the vehicle has a relatively sufficient battery charge and undertakes a relatively large weight reduction in power adjustment. The weight of the vehicle to be charged is: , indicating that the lower the electricity quantity of the vehicle to be charged, the larger its proportion in the total weight, in order to obtain more allocated power; When calculating the power adjustment value, first calculate the total power that all charged vehicles need to reduce: ; Then calculate the adjusted power of the th charging vehicle, and then calculate the power assigned to the vehicle to be charged.

2. The power distribution system on the load side of the charging pile according to claim 1, wherein: The charging power calculation module (100) is configured to calculate the charging power of each charging pile for a vehicle during charging by a power calculation method when the vehicle charges through the charging pile.

3. The power distribution system on the load side of the charging pile according to claim 2, wherein: The vehicle charging judgment module (200) includes a total power calculation unit (210) and an overload judgment unit (220); The total power calculation unit (210) is configured 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 sum of the charging powers of the charging piles. The overload judgment unit (220) is configured 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 ≥ the rated power, it indicates that the charging station is overloaded at this time. If the charging power < the rated power, it indicates that the charging station is not overloaded at this time.

4. The power distribution system on the load side of the charging pile according to claim 3, characterized in that: The steps for the overload judgment unit (220) to calculate the remaining charging power are as follows: Receive the signal 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.

5. The power distribution system on the load side of the charging pile according to claim 4, characterized in that: When a vehicle to be charged is newly added, the vehicle information acquisition module (300) sends a request for obtaining 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 acquires the vehicle model and battery power in the charging pile. At this time, the web crawler sends a request to a website server including the vehicle model and vehicle charging power information. After receiving the request from the web crawler, the website server feeds back a success and failure response. When it fails, the web crawler re-selects the website server. After the request is successful, the web crawler obtains the web page content and determines the minimum charging power required when the vehicle charges.

6. The power distribution system on the load side of the charging pile according to claim 5, characterized in that: The steps for the vehicle information acquisition module (300) to judge whether the vehicle to be charged can be charged are as follows: Receive the remaining charging power of the charging station calculated by the overload judgment unit (220). If the remaining charging power of the charging station > the minimum charging power of the vehicle to be charged, it indicates that the vehicle to be charged can be charged. If the remaining charging power of the charging station ≤ the minimum charging power of the vehicle to be charged, it indicates that the vehicle to be charged cannot be charged; After judging whether the vehicle can be charged, feedback the result to the vehicle to be charged through the established connection with the vehicle.

7. The power distribution system on the load side of the charging pile according to claim 6, characterized in that: The distribution judgment unit (410) is configured to receive the signal that the vehicle to be charged cannot be charged 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 vehicle to be charged. If the difference ≥ the rated power, it indicates that the charging power of the charged vehicle can be reduced to charge the vehicle to be charged. If the difference < the rated power, it indicates that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged.

8. A method for implementing power distribution on the load side of a charging pile, which is applied to the power distribution system on the load side of the charging pile described in any one of claims 1-7, and is characterized in that, Include the following steps: Step 1: The charging power calculation module (100) calculates the charging power during vehicle charging through the power calculation method; Step 2: The total power calculation unit (210) calculates the sum of the charging powers of each charging pile. 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; 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 during vehicle 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, and compares the difference with the minimum charging power of the vehicle to be charged to determine 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) determines that the charging power of the charged vehicle cannot be reduced to charge the vehicle to be charged, according to the battery power and charging power of each charged vehicle in the vehicle information acquisition module (300), calculates the charging time of each charged vehicle, sorts the charging times, selects the charging power of the vehicle with the minimum charging time, calculates the sum of the charging power of the vehicle with the minimum charging time and the remaining charging power, and determines whether the vehicle with the minimum charging time can charge the vehicle to be charged after charging is completed. If it can charge, the charging time of the vehicle with the minimum charging time at this time is the waiting time of the vehicle to be charged; Step 6: When the allocation judgment 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 powers of each charged vehicle and the vehicle to be charged.

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