Station pile power distribution method for new energy automobile battery swap station

Abstract

The invention discloses a station pile power distribution method for a new energy automobile battery swap station. The method comprises the following steps: S1) setting the highest available power of a station in a station control system; s2, the station control system is connected with all the charging bins and the charging piles through network cables; s3) calculating the highest autonomous charging power of the charging pile by using the number of the charging bins and the total power of the station after the station control system of the battery swap station is successfully connected with the equipment; and S4, when the charging bin has a new charging demand, the station control system checks the used power of the current charging pile and the occupied power of other charging bins, and distributes the power. According to the invention, the real-time power and demand power of the charging bin of the battery swap station and the charging pile outside the station are regulated and controlled, and the safety of the station transformer is protected while the energy storage effect of the battery in the station is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicles, and particularly relates to a method for allocating the power of station piles in a new energy vehicle swapping station. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional vehicle fuels as power sources (or use conventional vehicle fuels but adopt new in-vehicle power devices), integrating advanced technologies in vehicle power control and drive, and forming vehicles with advanced technical principles, new technologies, and new structures. New energy vehicles include: hybrid vehicles, pure electric vehicles, fuel cell vehicles, hydrogen engine vehicles, gas vehicles, alcohol ether vehicles, and so on.

[0003] Currently, as an energy storage facility, there are multiple battery devices in a new energy vehicle swapping station that need to be charged. Currently, the most commonly used new energy vehicle charging equipment is a charging pile. However, with the increase in power consumption and the aging of the substation transformers at the station, the total power of the station cannot support the simultaneous charging and energy replenishment operations of the swapping station and the charging piles, which easily leads to overvoltage and failure accidents of the substation transformers at the station. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that the substation transformers of existing swapping stations are prone to overvoltage and often malfunction.

[0005] To solve the above technical problems, a technical solution adopted by the present invention is as follows:

[0006] A method for allocating the power of station piles in a new energy vehicle swapping station, comprising the following steps:

[0007] S1): Set the maximum available power of the station in the station control system;

[0008] The maximum available power is calculated using the following formula:

[0009] P m = P x - P g

[0010] Wherein, P m is the maximum available power, P x is the power of the box-type transformer of the substation transformer at the station, and P g is the necessary power of non-charging equipment for the operation of the swapping station;

[0011] S2): The station control system connects all charging bins and charging piles through network cables;

[0012] S3): After the equipment connection is successful, the station control system of the swapping station calculates the maximum independent charging power of the charging piles using the number of charging bins and the total power of the station;

[0013] S4): When the charging bin has a new charging demand, the station control system checks the currently used power of the charging pile and the occupied power of other charging bins, and allocates power.

[0014] Furthermore, the step S3 includes the following steps:

[0015] S3-1): The charging bin or the charging pile is connected to the station control system;

[0016] S3-2): Calculate the autonomous power of the charging pile;

[0017] The autonomous charging power in the S3-2) is calculated using the following formula:

[0018] P zo = P m - P c * n

[0019] where, P zo is the maximum autonomous charging power, P m is the maximum available power, P c is the maximum charging power of the charging bin module of the battery swapping station, and n is the number of charging bin modules of the battery swapping station;

[0020] S3-3): Send the autonomous power to the charging pile.

[0021] Furthermore, the step S4 is divided into the following steps:

[0022] 4-1): Check the currently used power and calculate the occupied power of the charging bin;

[0023] The formula for the currently used power is as follows:

[0024] P n = P m - P cn - P zn

[0025] where, P n is the currently used power, P cn is the total used power of the charging bins that are charging, P zn is the currently used power of the charging pile;

[0026] 4-2): Compare the currently used power with the total power of the station:

[0027] If P n < P m then send a charging command

[0028] If P s > P cm , then send P cmPower charging;

[0029] If P s < P cm , then issue P s Power charging;

[0030] Among them, P s = P m - P n , P m is the maximum available power, P cm is the required power, P s is the remaining power;

[0031] 4 - 3): When the charging pile needs to change power, the station control system compares the remaining power with the required power:

[0032] If P zm < P za Then sort the charging bins being charged by SOC, stop charging the charging bins with lower SOC one by one, and save the power for the charging pile

[0033] If P zm > P za Then issue P za Power charging;

[0034] If P cn + P zn > P m Then perform emergency stop protection on the charging bins and the charging pile;

[0035] Among them, P zm = P m - P cn , where P zm is the current remaining power, P m is the maximum available power, P za is the required power, P cn is the total power used by the charging bins being charged, P zn is the current power used by the charging pile.

[0036] Furthermore, the autonomous power in S3 - 3 is sent to the charging pile through the Modbus communication method.

[0037] Furthermore, the number of charging bins that need to be stopped in step 4 - 3 is calculated according to the following formula:

[0038] N = P cd / P c

[0039] P cd = P za + P cn - P m

[0040] Among them, N is the number of charging bins that need to stop charging, and P cd Power saving, P za is the required power, P cn is the total power consumption of the charging bins that are currently charging, P m is the maximum available power, P c is the maximum charging power of the charging bin module in the battery swapping station.

[0041] Furthermore, the station control system and the charging bins adopt the TCP communication method.

[0042] Advantages of the present invention:

[0043] The present invention takes the station control system as the central control system of the entire battery swapping station. By connecting to the off-station charging piles through the network and interacting with the charging piles to obtain the current power consumption and power demand of the charging piles, under the premise of the total power of the station yard, the power consumption of the in-station charging bins and the off-station charging piles is flexibly allocated and balanced to ensure that the total power of the station yard does not exceed the maximum power that the transformer can withstand, which not only ensures the energy storage effect of the batteries in the station but also guarantees the charging efficiency of new energy vehicles outside the station, and at the same time protects the safety of the station yard transformer.

[0044] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following describes the preferred embodiments of the present invention in detail with reference to the accompanying drawings. Brief Description of the Drawings

[0045] Figure 1 is a relationship diagram of the station control system, charging bins, and charging piles of the present invention;

[0046] Figure 2 is a schematic diagram of the process of step 3;

[0047] Figure 3 is a schematic diagram of the process of step 4; Specific Embodiments

[0048] The following elaborates on the preferred embodiments of the present invention in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby clearly defining the protection scope of the present invention. Specific embodiments:

[0050] Such as Figures 1 to 3 shown, a method for allocating the power of the charging piles in a new energy vehicle battery swapping station includes the following steps:

[0051] S1): Set the maximum available power of the station yard in the station control system;

[0052] The maximum available power is calculated using the following formula:

[0053] Pm = Px - Pg

[0054] where Pm is the maximum available power, Px is the power of the substation transformer's box-type transformer, and Pg is the necessary power of the non-charging equipment for the operation of the swapping station;

[0055] S2): The station control system connects all charging bins and charging piles through a network cable; specifically, the station control system and the charging bin use the TCP (Transmission Control Protocol) communication method;

[0056] S3): After the equipment connection of the swapping station is successful, the station control system calculates the maximum independent charging power of the charging pile using the number of charging bins and the total power of the substation;

[0057] Specifically, step S3 includes the following steps:

[0058] S3-1): The charging bin or the charging pile links to the station control system;

[0059] S3-2): Calculate the independent power of the charging pile;

[0060] The independent charging power is calculated using the following formula:

[0061] Pzo = Pm - Pc * n

[0062] where Pzo is the maximum independent charging power, Pm is the maximum available power, Pc is the maximum charging power of the charging bin module of the swapping station, and n is the number of charging bin modules of the swapping station;

[0063] S3-3): Send the independent power to the charging pile. Specifically, the independent power is sent to the charging pile through the Modbus (a serial communication protocol) communication method.

[0064] S4): When there is a new charging demand in the charging bin, the station control system checks the currently used power of the current charging pile and the occupied power of other charging bins, and allocates power. Specifically, step S4 is divided into the following steps:

[0065] 4-1): Check the currently used power and calculate the occupied power of the charging bin;

[0066] The formula for the currently used power is as follows:

[0067] Pn = Pm - Pcn - Pzn

[0068] where Pn is the currently used power, Pcn is the total used power of the charging bins that are currently charging, and Pzn is the currently used power of the charging pile;

[0069] 4-2): Compare the currently used power with the total power of the station yard:

[0070] If Pn < Pm, issue a charging command.

[0071] If Ps > Pcm, charge at Pcm power;

[0072] If Ps < Pcm, charge at Ps power;

[0073] Where Ps = Pm - Pn, Pm is the maximum available power, Pcm is the required power, and Ps is the remaining power;

[0074] 4-3): When the power of the charging pile needs to change, the station control system compares the remaining power with the required power:

[0075] If Pzm < Pza, sort the charging bins in SOC during charging, stop charging the charging bins with lower SOC one by one, and save the power for the charging pile.

[0076] If Pzm > Pza, charge at Pza power;

[0077] If Pcn + Pzn > Pm, perform emergency stop protection on the charging bin and the charging pile;

[0078] Where Pzm = Pm - Pcn, where Pzm is the current remaining power, Pm is the maximum available power, Pza is the required power, Pcn is the total power used by the charging bins during charging, and Pzn is the current power used by the charging pile. Specifically, the number of charging bins to be stopped is calculated according to the following formula:

[0079] N = Pcd / Pc

[0080] Pcd = Pza + Pcn - Pm

[0081] Where N is the number of charging bins to be stopped, Pcd is the saved power, Pza is the required power, Pcn is the total power used by the charging bins during charging, Pm is the maximum available power, and Pc is the maximum charging power of the charging bin module of the battery swapping station.

[0082] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A method for allocating the power of charging piles in a new energy vehicle swapping station, characterized in that : It includes the following steps: S1): Set the maximum available power of the station in the station control system; The maximum available power is calculated using the following formula: P m = P x -P g Among them, P m is the highest available power, P x is the power of the box-type transformer of the substation, P g is the necessary power of the non-charging equipment for the operation of the battery swapping station; S2): The station control system connects all charging bins and charging piles through the network cable; S3): After the equipment connection of the station control system of the battery swapping station is successful, calculate the maximum independent charging power of the charging pile based on the number of charging bins and the total power of the station; S4): When there is a new charging demand in the charging bin, the station control system checks the power already used by the current charging pile and the power occupied by other charging bins, and allocates power.

2. The method for allocating the power of charging piles in a new energy vehicle swapping station according to claim 1, characterized in that: The step S3 includes the following steps: S3-1): The charging bin or the charging pile is connected to the station control system; S3-2): Calculate the independent power of the charging pile; In the S3-2), the independent charging power is calculated using the following formula: P zo = P m - P c * n Among them, P zo is the maximum autonomous charging power, P m is the maximum available power, P c is the maximum charging power of the charging bin module of the battery swapping station, and n is the number of charging bin modules of the battery swapping station; S3-3): Send the independent power to the charging pile.

3. The method for allocating the power of charging piles in a new energy vehicle swapping station according to claim 1, characterized in that: The step S4 is divided into the following steps: 4-1): Check the power already used currently and calculate the power occupied by the charging bin; The formula for the power already used currently is as follows: P n = P m -P cn -P zn Among them, P n is the currently used power, P cn is the total power used by the charging case during charging, P zn is the current power used by the charging pile; 4-2): Compare the power already used currently with the total power of the station: If P n <P m then issue a charging command If P s >P cm , then send P cm for power charging; If P s <P cm , then send P s for power charging; Among them, P s = P m - P n , where P m is the maximum available power, P cm is the required power, and P s is the remaining power; 4-3): When the power of the charging pile needs to change, the station control system compares the remaining power with the required power: If P zm <P za Then, perform SOC sorting on the charging bins during charging, stop charging the charging bins with lower SOC one by one, and save the power for the charging pile If P zm > P za then issue P za Power charging; If P cn +P zn >P m then perform emergency stop protection on the charging case and the charging pile; Among them, P zm = P m - P cn , where P zm is the remaining power at present, P m is the highest available power, P za is the required power, P cn is the total power consumption of the charging bin during charging, and P zn is the current power consumption of the charging pile.

4. The method for allocating the power of charging piles in a new energy vehicle swapping station according to claim 2, characterized in that: In the S3-3, the independent power is sent to the charging pile through the Modbus communication method.

5. The method for allocating the power of charging piles in a new energy vehicle swapping station according to claim 3, characterized in that: The number of charging bins that need to be stopped in the 4-3 step is calculated according to the following formula: N = P cd / P c P cd = P za + P cn - P m Among them, N is the number of charging bins that need to be stopped, P cd Power saving, P za Is the required power, P cn Is the total power consumption of the charging bins that are currently charging, P m Is the maximum available power, P c Is the maximum charging power of the charging bin module in the battery swapping station.

6. The method for allocating the power of the station pile of a new energy vehicle swapping station according to claim 1, characterized in that: The station control system and the charging bin adopt the TCP communication method.

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