Split type high-power charging equipment single-gun megawatt-level power distribution system and method

Abstract

The invention relates to the technical field of battery charging, and discloses a single-gun megawatt-level power distribution system and method for split type high-power charging equipment. Comprising a mode allocation module for executing a single-gun allocation mode or a multi-gun allocation mode, a single-gun execution module for allocating charging power to a charging gun, a state switching module for switching to a full-gun full-amount state or a local allocation state, a full-amount allocation module for allocating the charging power to the charging gun, a hierarchical allocation module for allocating the charging power to a high-order battery and a flat-order battery, the surplus distribution module is used for redistributing the released surplus power; according to the invention, irreversible damage to the batteries due to the fact that part of the to-be-charged batteries are in high charging power for a long time can be avoided, and redundant power of the to-be-charged batteries in a high electric quantity state can be redistributed to other to-be-charged batteries with low charging power in time; and all the to-be-charged batteries can be safely charged as soon as possible.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery charging, more particularly, the present application relates to a split type high-power charging equipment single-gun megawatt power distribution system and method. BACKGROUND

[0002] In the field of commercial transportation and special operation such as heavy trucks and engineering machinery, due to the huge battery capacity, the demand for single-gun megawatt high-power charging technology is extremely urgent to meet the battery charging needs of mechanical equipment with large battery capacity. Therefore, a split type high-power charging equipment is needed to distribute the charging power of the charging gun to ensure the rationality and accuracy of power distribution on the charging equipment.

[0003] The patent application with publication number CN116729188A discloses a method and system for multi-section power distribution of a direct current charging pile. The charging mode is divided into normal charging and intelligent charging. The power of the charging pile and the charging gun can be limited under intelligent charging. Different module node scheduling schemes are proposed under single-gun and multi-gun charging scenarios to limit the charging power of each gun according to the requirements issued by the platform and control the charging process. The method and system can make the power distribution more reasonable, effectively reduce the action of the contactor switch, and prolong the service life of the equipment. The existing power distribution system usually relies on the current power, rated capacity and other basic state parameters of the battery, and combines first-come-first-served or simple average distribution method when distributing power. This power distribution method makes the power distribution process relatively static, which cannot differentiate the power distribution according to the urgency of the battery to be charged, cannot meet the actual priority needs of the charging equipment operation, and cannot monitor, release and redistribute the surplus power in the charging process in real time, resulting in the idle and waste of part of the charging power of the high-power battery in the charging power reduction stage, thereby reducing the rationality and efficiency of the power distribution of the charging equipment.

[0004] Therefore, the present application provides a split type high-power charging equipment single-gun megawatt power distribution system and method to solve the above problems. SUMMARY

[0005] In order to overcome the above-mentioned defects of the prior art and achieve the above-mentioned purposes, the present application provides the following technical solutions: a split type high-power charging equipment single-gun megawatt power distribution system applied to a charging server, comprising: A mode distribution module based on the basic operating parameters of the charging gun, counts the number of charging guns in working state, and controls the charging equipment to execute single-gun distribution mode or multi-gun distribution mode. The single-gun execution module collects the power demand parameter of the battery to be charged, calculates a first demand value, and controls the charging equipment to distribute charging power to the charging gun; The state switching module calculates a second demand value of the battery to be charged, analyzes the second demand value and the total power value, and controls the charging equipment to switch to a full-gun full-capacity state or a local distribution state; The full-capacity distribution module determines a power distribution value of the charging gun, and controls the charging equipment to distribute charging power to the charging gun; The step-by-step distribution module collects priority parameters of the battery to be charged, calculates a priority index, divides the battery to be charged into high-order batteries and flat-order batteries, and distributes charging power to the high-order batteries and the flat-order batteries based on a safety distribution criterion; The surplus distribution module determines surplus power of the high-order batteries and the flat-order batteries, and redistributes the surplus power released by the high-order batteries and the flat-order batteries.

[0006] Further, the basic operating parameters include an on-off state value, a fault state value, a real-time power value, and a real-time current value; The state of the charging gun in which the on-off state value is 11, the fault state value is 0, the real-time power value is greater than the power lower limit value, and the real-time current value is greater than the current lower limit value is recorded as a working state.

[0007] Further, the execution steps of the single-gun distribution mode or the multi-gun distribution mode are: The number of charging guns in the working state is counted and recorded as an effective charging amount; When the effective charging amount is 1, the charging equipment executes the single-gun distribution mode; When the effective charging amount is greater than 1, the charging equipment executes the multi-gun distribution mode.

[0008] Further, the power demand parameter includes a rated power and a power conversion rate; The calculation formula of the first demand value is: ; In the formula, is the first demand value, is the rated power, is the power conversion rate; When distributing charging power, the maximum charging power of the charging gun is queried and recorded as a single-gun power. When the first demand value is greater than the single-gun power, the charging equipment distributes charging power to the charging gun consistent with the single-gun power; When the first demand value is less than or equal to the single-gun power, the charging equipment distributes charging power to the charging gun consistent with the first demand value.

[0009] Further, when calculating the second demand value, the rated power and power conversion rate of the A to-be-charged batteries are collected first, the first demand values of the A to-be-charged batteries are calculated, and the A first demand values are added one by one to obtain the second demand value.

[0010] Further, the switching step of the full-gun full-capacity state or the local distribution state is: The maximum power supply power of the charging device at the current time is queried through the charging server, recorded as a total power value, and the total power value is compared with the second demand value; When the total power value is greater than or equal to the second demand value, the charging state is switched to the full-gun full-capacity state; When the total power value is less than the second demand value, the charging state is switched to the local distribution state.

[0011] Further, the priority parameters include the unit price excess proportion, the user level value and the remaining power proportion; The division step of the high-order battery and the flat-order battery is: The unit price excess proportion, the user level value and the remaining power proportion of the A to-be-charged batteries are respectively given different proportion coefficients and compared to obtain A priority indexes; The priority indexes of the A to-be-charged batteries are compared with the calibrated priority threshold value in turn; The calculation formula of the priority index is: ; In the formula, is the priority index, is the user level value, , , The proportion coefficients of the unit price excess proportion, the user level value and the remaining power proportion respectively are; When the priority index is greater than or equal to the priority threshold value, the to-be-charged battery is divided into a high-order battery to obtain B high-order batteries; When the priority index is less than the priority threshold value, the to-be-charged battery is divided into a flat-order battery to obtain D flat-order batteries.

[0012] Further, the safety distribution criterion is that the to-be-charged battery is in a safe state as a benchmark; The step of distributing charging power to the high-order battery and the flat-order battery is: The first demand value of the B high-order batteries is compared with the single-gun power of the charging gun respectively; When the first demand value is greater than the single-gun power, the charging power consistent with the single-gun power is distributed to the high-order battery; When the first demand value is less than or equal to the single-gun power, the charging power consistent with the first demand value is distributed to the high-order battery; After all the B high-order batteries have been allocated their corresponding charging power, the remaining charging power of the charging device is evenly distributed to the D equal-order batteries.

[0013] Furthermore, the steps for determining surplus power are as follows: The battery capacity ratio and charging power of B high-order batteries and D equal-order batteries in historical charging events were retrieved from the database to obtain the capacity value and power value. Plot an energy-power curve with energy value on the x-axis and power value on the y-axis. Record the power value of any two adjacent points on the energy-power curve as an identification unit, and calculate the absolute value of the difference between the two power values ​​in the identification unit, which is recorded as the power difference. The identification unit whose power difference is greater than the calibration difference is recorded as the attenuation unit, and the smaller power value in the attenuation unit is recorded as the attenuation power value; The difference between the charging power and the power degradation value of the high-end battery is calculated, and the difference is taken as the surplus power of the high-end battery. When the charging power of a flat battery is greater than the degradation power value, the difference between the charging power and the degradation power value is calculated and recorded as the surplus power of the flat battery; when the charging power is less than or equal to the degradation power value, the flat battery has no surplus power.

[0014] A method for single-gun megawatt-level power distribution in split-type high-power charging equipment, applied to charging servers, is implemented based on a single-gun megawatt-level power distribution system for split-type high-power charging equipment, including: S01: Based on the basic operating parameters of the charging gun, count the number of charging guns in working state, and control the charging equipment to execute single-gun distribution mode or multi-gun distribution mode; if single-gun distribution mode is executed, execute S02; if multi-gun distribution mode is executed, execute S03. S02: Collect the power demand parameters of the battery to be charged, calculate the first demand value, and control the charging equipment to allocate charging power to the charging gun. S03: Calculate the second demand value of the battery to be charged, analyze the second demand value with the total power value, and control the charging equipment to switch to full-gun full-capacity state or partial distribution state; if switching to full-gun full-capacity state, execute S04; if switching to partial distribution state, execute S05. S04: Determine the power allocation value of the charging gun and control the charging equipment to allocate charging power to the charging gun; S05: Collect the priority parameters of the battery to be charged, calculate the priority index, divide the battery to be charged into high-order batteries and flat-order batteries, and allocate charging power to high-order batteries and flat-order batteries based on the safety allocation criteria. S06: Determine the surplus power of the high-order and flat-order batteries, and redistribute the surplus power released by the high-order and flat-order batteries.

[0015] The technical effects and advantages of the split type high-power charging equipment single-gun megawatt power distribution system and method are as follows: (1) The charging equipment can be controlled to execute single-gun distribution mode or multi-gun distribution mode, and the charging equipment can be controlled to switch between full-gun full-capacity state and local distribution state, so that single-gun independent charging and multi-gun synchronous charging can be realized according to the number of charging guns in working state on the charging equipment, the adaptive power distribution demand of different numbers of charging guns can be met, and the charging equipment can be controlled to execute the corresponding distribution state according to the size relationship between the charging power required by the charging gun and the charging power provided by the charging equipment, so that different effects in the case of full-capacity power distribution and non-full-capacity power distribution of the charging gun can be realized, the charging equipment can be adaptively adjusted and controlled in power distribution from two dimensions of the number and power demand of the actual charging gun, and the application range of the charging equipment is improved.

[0016] (2) The charging equipment can be controlled to execute the corresponding distribution state according to the size relationship between the charging power required by the charging gun and the charging power provided by the charging equipment, so that different effects in the case of full-capacity power distribution and non-full-capacity power distribution of the charging gun can be realized, the charging equipment can be adaptively adjusted and controlled in power distribution from two dimensions of the number and power demand of the actual charging gun, and the application range of the charging equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The architecture schematic diagram of the split type high-power charging equipment single-gun megawatt power distribution system provided by the first embodiment of the present application is shown in the figure. Figure 2 The power curve diagram provided by the first embodiment of the present application is shown in the figure. Figure 3 The flowchart of the split type high-power charging equipment single-gun megawatt power distribution method provided by the second embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0018] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below, obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0019] Embodiment one: please refer to Figures 1-2 The single-gun megawatt power distribution system of the split type high-power charging device described in the embodiment is applied to a charging server and includes: The mode distribution module, in a device startup state, queries the basic operation parameters of the charging gun in real time, counts the number of charging guns in a working state, and controls the charging device to execute the corresponding power distribution mode, including a single-gun distribution mode and a multi-gun distribution mode. The split type high-power charging device refers to a split type charging device containing a high-power power supply cabinet and multiple independent charging guns. The single-gun megawatt indicates that the maximum charging power of a single charging gun can reach the power range of megawatts, thereby meeting the charging needs of heavy mechanical equipment loaded with large-capacity batteries.

[0020] The basic operation parameters refer to related parameters that affect normal charging at the current time and serve as the basic parameters for judging whether the charging gun remains in a normal charging state at the current time. When collecting the basic operation parameters, it is necessary to ensure that the charging device is in a startup state, and the prerequisite for the charging device being in a startup state is that the charging gun has generated corresponding parameter changes. The basic operation parameters include switch state values, fault state values, real-time power values, and real-time current values. Specifically, the switch state value is used to represent the result of the on-off state of the charging line at the current time of the charging gun. The on-off state includes the open state and the closed state. When in the open state, the switch state value is 11, and when in the closed state, the switch state value is 00. The fault state value refers to the number of faults in the safety self-checking system of the charging gun at the current time, that is, it can represent the number of real-time charging faults of the charging gun. The real-time power value and the real-time current value refer to the working power and the working current of the charging gun at the current time, that is, they can represent the power and current size of the charging gun.

[0021] The switch state value, the fault state value, the real-time power value, and the real-time current value are all obtained by querying the charging server of the charging device.

[0022] After the basic operation parameters of the charging gun are queried, whether the charging gun is in a working state can be determined based on the basic operation parameters. When the charging gun is in a working state, the charging gun can normally and safely charge the battery connected thereto. Therefore, the switch state value, the fault state value, the real-time power value and the real-time current value of the charging gun in the working state need to meet the corresponding requirements. In this embodiment, when it is determined whether the charging gun is in a working state, the state in which the switch state value of the charging gun is 11, the fault state value is 0, the real-time power value is greater than the power lower limit value, and the real-time current value is greater than the current lower limit value is recorded as a working state. The power lower limit value and the current lower limit value respectively refer to the minimum values corresponding to the real-time power value and the real-time current value of the charging gun in the working state, so as to ensure that the charging gun in the working state can guarantee the most basic charging capacity. Specifically, the power lower limit value and the current lower limit value are obtained by querying the minimum values corresponding to the real-time power value and the real-time current value of the charging gun in the working state.

[0023] The power distribution mode is used to represent the working mode of the charging gun of the charging device to specifically perform single-gun operation or multi-gun operation, that is, to realize different power distribution effects of single charging of one charging gun of the charging device or simultaneous charging of multiple charging guns. Specifically, the power distribution mode includes a single-gun distribution mode and a multi-gun distribution mode. The single-gun distribution mode and the multi-gun distribution mode respectively meet the power distribution needs of one charging gun and multiple charging guns.

[0024] In order to accurately control the charging device to perform the single-gun distribution mode or the multi-gun distribution mode, the number of charging guns in the working state needs to be counted, and the final mode to be executed is determined according to the counting result. The execution steps of the power distribution mode are as follows: The number of charging guns in the working state is counted and recorded as the effective charging amount. When the effective charging amount is 1, it indicates that only one charging gun of the charging device is in a working state. At this time, the charging device performs the single-gun distribution mode. When the effective charging amount is greater than 1, it indicates that more than one charging gun of the charging device is in a working state. At this time, the charging device performs the multi-gun distribution mode.

[0025] It should be noted that when the effective charging amount is 0, it indicates that the charging device has not reached the normal working standard. At this time, the charging device has not performed the charging operation, and therefore the charging device will not perform the single-gun distribution mode or the multi-gun distribution mode, and will remain in the current state. The subsequent technical solutions in this embodiment are based on the execution of the single-gun distribution mode or the multi-gun distribution mode, and therefore the case where the effective charging amount is 0 is not considered.

[0026] The single-gun execution module collects the power demand parameter of the battery to be charged in the single-gun distribution mode, calculates a first demand value, and controls the charging device to distribute charging power to the charging gun; When in the single-gun distribution mode, only one charging gun needs to be charged at this time, and the situation that other charging guns will snatch power supply power does not need to be considered, therefore, only the maximum power that the battery to be charged can withstand needs to be considered, and the maximum power that the battery to be charged can withstand is recorded as the first demand value; When calculating the first demand value, the power demand parameter of the battery to be charged needs to be collected first, so that the power demand parameter can reflect the value of the power demand of the battery to be charged itself, and serve as the basis for the power value of the charging device to the battery to be charged; Specifically, the power demand parameter includes rated power and power conversion rate; the rated power refers to the maximum charging power that the battery to be charged can withstand in a safe state, and the power conversion rate refers to the efficiency of the charging power in the charging gun actually introduced to the battery to be charged; when collecting the rated power and the power conversion rate, the parameter database of the battery to be charged is queried to obtain.

[0027] The rated power and the power conversion rate are combined to calculate the first demand value of the battery to be charged for safe charging, and specifically, the calculation formula of the first demand value is: ; In the formula, is the first demand value, is the rated power, is the power conversion rate.

[0028] In order to ensure that the charging gun can charge the battery to be charged in a safe state, the power supply power that the charging gun and the battery to be charged can withstand needs to be compared in size, and the charging gun is distributed power according to the comparison result; Specifically, after the first demand value is calculated, the maximum charging power of the charging gun is queried and recorded as single-gun power, and the first demand value of the battery to be charged is compared with the single-gun power; when the first demand value is greater than the single-gun power, the charging device distributes charging power to the charging gun, and the size of the charging power is consistent with the single-gun power; when the first demand value is less than or equal to the single-gun power, the charging device distributes charging power to the charging gun, and the size of the charging power is consistent with the first demand value.

[0029] It should be noted that the charging power of a single charging gun in this embodiment can reach the megawatt level, making the maximum charging power of a single charging gun at least 1000KW. However, the maximum charging power allowed for the battery to be charged under safe conditions may be below or above 1000KW. Therefore, the maximum charging power of a single charging gun is greater than, equal to, or less than the maximum charging power allowed for the battery to be charged under safe conditions.

[0030] In multi-gun allocation mode, the state switching module collects the power demand parameters of the battery to be charged, calculates the second demand value, performs full-capacity analysis on the second demand value, and controls the charging equipment to switch charging states based on the analysis results; the charging states include full-gun capacity state and partial allocation state. When in multi-gun distribution mode, there are multiple charging guns that need to perform charging operations. It is necessary to consider the situation where other charging guns will compete for power. Therefore, it is necessary to consider the sum of the maximum power that the batteries to be charged connected to multiple charging guns can withstand, and record the sum of the maximum power that the batteries to be charged can withstand as the second demand value. When calculating the second demand value, it is also necessary to first collect the power demand parameters of the batteries to be charged, calculate the power required by each battery to be charged, and add the power required by multiple batteries to be charged to calculate the sum of the maximum power that multiple batteries to be charged can withstand, and record it as the second demand value. Specifically, when calculating the second demand value, the rated power and power conversion rate need to be collected first, and the first demand value of A batteries to be charged needs to be calculated using the same method as the first demand value. The second demand value is obtained by adding the A first demand values ​​together. Specifically, the formula for calculating the second demand value is as follows: ; In the formula, This is the second demand value. For the first The rated power of each battery to be charged. For the first The power conversion efficiency of a battery to be charged.

[0031] After calculating the second demand value, the second demand value of A batteries to be charged can be compared with the maximum charging power that the charging device can provide to perform a full-capacity analysis of the second demand value, thereby determining whether A batteries to be charged can be charged at full charging power. At the same time, based on the results of the full-capacity analysis, the charging device can be controlled to enter different charging states. The charging status is used to indicate the current charging power of the charging gun connected to the battery to be charged, and serves as a prerequisite for the power allocation of the subsequent A charging guns. The charging state includes a full gun full state and a local distribution state; wherein the full gun full state refers to the state that all the battery connections connected with the A charging guns are in full charging power, at this time the power that the charging device can provide is greater than or equal to the sum of the power required by all the batteries to be charged, and the local distribution state refers to the state that not all the battery connections connected with the A charging guns are in full charging power, at this time the power that the charging device can provide is less than the sum of the power required by all the batteries to be charged.

[0032] The switching method of the charging state is: The maximum power supply power of the charging device at the current time is queried through the charging server, which is recorded as a total power value, and the total power value is compared with the second demand value; When the total power value is greater than or equal to the second demand value, at this time the charging device can meet the demand of full charging power of the A charging guns, and the charging state is switched to the full gun full state; When the total power value is less than the second demand value, at this time the charging device cannot meet the demand of full charging power of the A charging guns, and the charging state is switched to the local distribution state.

[0033] It should be noted that when all the charging guns are in the maximum charging power for charging, the sum of the maximum charging power of all the charging guns is equal to the maximum charging power that the charging device can provide.

[0034] The full distribution module determines the power distribution value of each charging gun under the full gun full state, and controls the charging device to distribute the corresponding charging power to the charging gun; When in the full gun full state, all the batteries to be charged can be kept in the state of rated power for charging, and the charging device needs to distribute the corresponding power distribution value to the A charging guns connected with the A batteries to be charged, so as to ensure that the A batteries to be charged can be kept in the state of rated power for charging; Specifically, when determining the power distribution value of the charging gun, the maximum charging power of the charging gun is queried, which is recorded as a single gun power, and the first demand value of the battery to be charged is compared with the single gun power; when the first demand value is greater than the single gun power, the single gun power is taken as the power distribution value; when the first demand value is less than or equal to the single gun power, the first demand value is taken as the power distribution value.

[0035] It should be noted that the power distribution value of the charging gun is actually the charging power when the battery to be charged is safely charged, after the power distribution value of the A charging guns is determined, the charging device can distribute the charging power with the same size as the power distribution value to the A charging guns, and full charging in the safe state is carried out on the A batteries to be charged through the A charging guns, so as to ensure that the A batteries to be charged can be kept in the best and safe state.

[0036] The step distribution module collects the priority parameters of each battery to be charged respectively in the local distribution state, calculates the priority index of the battery to be charged, divides the battery to be charged into high-order batteries and flat-order batteries, and distributes corresponding charging power to the high-order batteries and the flat-order batteries based on the safety distribution criteria; When in the local distribution state, not all batteries to be charged can be kept in the best safe state for charging. The charging device needs to distribute corresponding power to A charging guns connected with A batteries to be charged respectively to realize the orderly charging process of A batteries to be charged. Since the distributable power of the charging device cannot meet the condition that A batteries to be charged are all in the rated power state, it is necessary to calculate and sort the power size distributed to A batteries to be charged, and to adjust the power size distributed to A batteries to be charged according to the calculation and sorting results.

[0037] Since the charging guns corresponding to A batteries to be charged may be in different factors such as electricity price, user level, emergency degree, etc. when charging, the size of the charging power distributed to different batteries to be charged may be different when the charging power of the charging device is distributed. In order to clarify the differences between the batteries to be charged and determine the charging power distributed to each battery to be charged, the priority index of the battery to be charged needs to be calculated, so that the priority index can be used as a numerical basis for distinguishing the levels of the batteries to be charged, and the size of the distributed power of each battery to be charged is determined in turn. When calculating the priority index, the priority parameters of the battery to be charged need to be collected first, so that the priority parameters can be used as the influencing parameters reflecting the priority level of the battery to be charged when the power is distributed. Specifically, the priority parameters include the excess proportion of unit price, the user level value and the proportion of remaining power. The excess proportion of unit price refers to the proportion of the real-time unit price selected by the charging gun corresponding to the battery to be charged when charging exceeding the benchmark unit price, that is, it can represent the excess proportion of the electricity fee paid by the battery to be charged when charging. The larger the excess proportion of unit price, the larger the priority index of the battery to be charged, and the higher the priority order of full-charge. Specifically, when collecting the excess proportion of unit price, first, the charging unit prices selected by A batteries to be charged when charging are queried respectively to obtain A real-time unit prices, then A unit price differences are obtained by comparing A real-time unit prices with the benchmark unit price one by one, and finally A unit price excess proportions are calculated by comparing A unit price differences with the benchmark unit price in turn. The benchmark unit price refers to the lowest charging unit price when normal charging on the charging device, which is obtained by querying the charging server.

[0038] The calculation formula of the unit price excess proportion is: ; In the formula, is the unit price excess proportion, is the real-time unit price, is the reference unit price.

[0039] The user level value refers to the level value of the account user corresponding to the battery to be charged connected with the charging gun during charging, that is, the value of the account user of the battery to be charged can be represented; when the user level value is larger, the priority index of the battery to be charged is larger, and the priority order of full-charge is earlier; Specifically, when collecting the user level value, the charging server is queried to query the level data of the account user corresponding to the battery to be charged one by one, and the digital part in the level data is recorded as the user level value.

[0040] The residual capacity proportion refers to the ratio between the residual capacity and the total capacity of the battery to be charged connected with the charging gun during charging, that is, the size of the residual capacity of the battery to be charged can be represented; when the residual capacity proportion is larger, it means that the priority index of the battery to be charged is smaller, and the priority order of full-charge is later; Specifically, when collecting the residual capacity proportion, the residual capacities of the A batteries to be charged at the current time are queried one by one, and after comparing the A residual capacities with the total capacities of the A batteries to be charged, the A residual capacity proportions are calculated.

[0041] The calculation formula of the residual capacity proportion is: ; In the formula, is the residual capacity proportion, is the residual capacity, is the total capacity.

[0042] After collecting the priority parameters of the battery to be charged, the priority index of the battery to be charged can be calculated based on the priority parameters; Specifically, the calculation steps of the priority index are: The unit price excess proportions, the user level values and the residual capacity proportions of the A batteries to be charged are respectively assigned different proportion coefficients and compared to obtain A priority indexes; The calculation formula of the priority index is: ; In the formula, is the priority index, is the user level value, , , The ratio coefficients are respectively a monovalent excess ratio, a user level value and a residual power ratio, and .

[0043] After the priority index of the to-be-charged battery is calculated, the priority order of full-charge of different to-be-charged batteries can be distinguished according to the size of the priority index, and the to-be-charged batteries with different priority orders are divided into high-order batteries and flat-order batteries. The high-order battery refers to a to-be-charged battery that can be charged with a larger power, so that the high-order battery can be charged with the maximum power in a safe state, and the flat-order battery refers to a to-be-charged battery that cannot be charged with the maximum power in a safe state.

[0044] The division steps of the high-order battery and the flat-order battery are as follows: The priority index of the A to-be-charged batteries is compared with the calibrated priority threshold value in turn; When the priority index is greater than or equal to the priority threshold value, the priority level of full-charge of the to-be-charged battery is higher than the basic level at this time, and the to-be-charged battery is divided into a high-order battery, and B high-order batteries are obtained; When the priority index is less than the priority threshold value, the priority level of full-charge of the to-be-charged battery is consistent with the basic level at this time, and the to-be-charged battery is divided into a flat-order battery, and D flat-order batteries are obtained.

[0045] It should be noted that the priority threshold value refers to the critical value of the priority index corresponding to the priority level and the non-priority level when the to-be-charged battery is fully charged, which can provide accurate numerical basis for the division of the high-order battery and the flat-order battery, and ensure the accuracy of the division of the high-order battery and the flat-order battery. Specifically, the priority threshold value is obtained by averaging a large number of critical values of the priority index corresponding to the priority level and the non-priority level.

[0046] After the high-order battery and the flat-order battery are divided, the maximum charging power that the charging device can provide can be distributed to the high-order battery and the flat-order battery according to certain distribution criteria. In order to ensure the accuracy of the power distribution of the high-order battery and the flat-order battery, the power distribution operation needs to be performed under the limitation of the safe distribution criteria. Specifically, the safe distribution criteria are: taking the to-be-charged battery in a safe state as the benchmark; the high-order battery and the flat-order battery can be orderly and reasonably distributed to the corresponding charging power.

[0047] The steps of distributing the charging power to the high-order battery and the flat-order battery are as follows: The first demand value of the B high-order batteries is compared with the single-gun power of the corresponding charging gun; When the first demand value is greater than the single-gun power, at this time the charging power demanded by the high-order battery is greater than the maximum charging power of the charging gun, the charging power consistent with the size of the single-gun power is allocated to the high-order battery; When the first demand value is less than or equal to the single-gun power, at this time the charging power demanded by the high-order battery is less than or equal to the maximum charging power of the charging gun, the charging power consistent with the size of the first demand value is allocated to the high-order battery; After the B high-order batteries are all allocated to the corresponding charging power, the remaining charging power of the charging device is evenly allocated to the D flat-order batteries.

[0048] It should be noted that since the B high-order batteries allocate the maximum charging power when allocating the charging power, the maximum charging power allocated will be less than or equal to the maximum charging power of the charging gun connected thereto, so that part of the power on the charging device will not be allocated. Therefore, after the B high-order batteries are all allocated to the corresponding charging power, a certain amount of charging power will be left on the charging device, i.e. the remaining charging power on the charging device can be evenly allocated to the D flat-order batteries.

[0049] The surplus allocation module determines the surplus power of the high-order battery and the flat-order battery, releases the surplus power when the high-order battery and the flat-order battery reach the power attenuation moment, and reallocates the released surplus power; The surplus power refers to the power released when the charging power of the high-order battery and the flat-order battery decreases at the power attenuation moment, so that the surplus power can be recovered into the charging device again and allocated to other high-order batteries and flat-order batteries again; Specifically, the determination step of the surplus power is: The battery power and the corresponding charging power of the B high-order batteries and the D flat-order batteries in the historical charging event are obtained by querying the database respectively. The power value is taken as the abscissa and the power value is taken as the ordinate to draw a power-quantity curve graph. The power values corresponding to any two adjacent points in the power-quantity curve graph are taken as an identification unit, and the absolute value of the difference between the two power values in the identification unit is calculated one by one and recorded as a power difference value. The identification unit with a power difference value greater than a calibration difference value is recorded as a decay unit, and the smaller power value in the decay unit is recorded as a decay power value. The calibration difference value is the minimum value of the absolute value of the difference between the two power values recorded as the decay unit, which can be used as a basis for judging whether the power value in the identification unit contains the decay power value. Specifically, the calibration difference value is obtained by averaging the minimum value of the absolute value of the difference between the two power values recorded as the decay unit after collecting a large number of historical data. The charging power of the high-order battery is compared with the decay power value, and the difference value is taken as the surplus power of the high-order battery. The charging power of the flat-stage battery is compared with the attenuation power value, and when the charging power is greater than the attenuation power value, the charging power is compared with the attenuation power value, and the difference is recorded as the surplus power of the flat-stage battery; When the charging power is less than or equal to the attenuation power value, there is no surplus power in the flat-stage battery at this time.

[0050] It should be noted that when there is no surplus power in the flat-stage battery, there will be no power attenuation time, and no surplus power will be released to the outside. The flat-stage battery can only receive the surplus power released by other high-stage batteries and flat-stage batteries.

[0051] According to the above method of drawing the power curve, the power values and power values of a plurality of high-stage batteries and flat-stage batteries are queried, and the power values and power values of one of the high-stage batteries are selected to draw the power curve, as shown in Figure 2 As shown in the figure, the maximum charging power of the high-stage battery in the safe state is 800KW, and the attenuation power value is 270KW.

[0052] The power attenuation time is the time when the charging power of the high-stage battery and the flat-stage battery drops sharply during charging, and is used as the time basis for the charging power of the high-stage battery and the flat-stage battery to change greatly. When determining whether the power attenuation time is reached, only the power values of the high-stage battery and the flat-stage battery need to be monitored in real time, and the time when the power values of the high-stage battery and the flat-stage battery first reach the attenuation power value is recorded as the power attenuation time.

[0053] After determining the surplus power of the high-stage battery and the flat-stage battery, the power values of the high-stage battery and the flat-stage battery can be detected in real time, and when the high-stage battery or the flat-stage battery first reaches the power attenuation time, the surplus power on the high-stage battery or the flat-stage battery is released, and the released surplus power is recovered to the charging device. At this time, the charging power available for distribution in the charging device will increase, and the recovered surplus power can be distributed again to achieve the effect of dynamic redistribution of the charging power of the high-stage battery and the flat-stage battery.

[0054] Embodiment two: please refer to Figure 3 As shown in the figure, the embodiment does not describe some parts in detail, and provides a megawatt power distribution method for a split large-power charging device single gun, which is applied to a charging server and realized based on a split large-power charging device single gun megawatt power distribution system, including: S01: based on the basic operating parameters of the charging gun, the number of charging guns in the working state is counted, and the charging equipment is controlled to execute a single-gun distribution mode or a multi-gun distribution mode; if the single-gun distribution mode is executed, S02 is executed; if the multi-gun distribution mode is executed, S03 is executed; S02: the power demand parameters of the battery to be charged are collected, a first demand value is calculated, and the charging equipment is controlled to distribute charging power to the charging gun; S03: a second demand value of the battery to be charged is calculated, the second demand value is analyzed with a total power value, and the charging equipment is controlled to switch to a full-gun full-capacity state or a local distribution state; if the full-gun full-capacity state is switched, S04 is executed; if the local distribution state is switched, S05 is executed; S04: the power distribution value of the charging gun is determined, and the charging equipment is controlled to distribute charging power to the charging gun; S05: the priority parameters of the battery to be charged are collected, a priority index is calculated, the battery to be charged is divided into high-order batteries and flat-order batteries, and charging power is distributed to the high-order batteries and the flat-order batteries based on a safety distribution criterion; S06: the surplus power of the high-order batteries and the flat-order batteries is determined, and the surplus power released by the high-order batteries and the flat-order batteries is redistributed.

[0055] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A split high-power charging device single-gun megawatt power distribution system applied to a charging server, characterized in that, The application relates to a charging device and a charging method thereof. The mode distribution module calculates the number of charging guns in a working state based on basic operation parameters of the charging gun, and controls the charging device to execute a single-gun distribution mode or a multi-gun distribution mode; The single-gun execution module collects power demand parameters of the battery to be charged, calculates a first demand value, and controls the charging device to distribute charging power to the charging gun; The state switching module calculates a second demand value of the battery to be charged, analyzes the second demand value and a total power value, and controls the charging device to switch to a full-gun full-capacity state or a local distribution state; The full-capacity distribution module determines a power distribution value of the charging gun, and controls the charging device to distribute charging power to the charging gun; The step-by-step distribution module collects priority parameters of the battery to be charged, calculates a priority index, divides the battery to be charged into high-order batteries and flat-order batteries, and distributes charging power to the high-order batteries and the flat-order batteries based on a safety distribution criterion; The surplus distribution module determines surplus power of the high-order batteries and the flat-order batteries, and redistributes the surplus power released by the high-order batteries and the flat-order batteries.

2. The split type high-power charging device single-gun megawatt-level power distribution system according to claim 1, characterized in that, The basic operation parameters include an on-off state value, a fault state value, a real-time power value and a real-time current value; The state of the charging gun in which the on-off state value is 11, the fault state value is 0, the real-time power value is greater than a power lower limit value, and the real-time current value is greater than a current lower limit value is recorded as the working state.

3. The split type high-power charging device single-gun megawatt-level power distribution system according to claim 2, characterized in that, The execution steps of the single-gun distribution mode or the multi-gun distribution mode are as follows: The number of charging guns in the working state is calculated and recorded as an effective charging amount; When the effective charging amount is 1, the charging device executes the single-gun distribution mode; When the effective charging amount is greater than 1, the charging device executes the multi-gun distribution mode.

4. The split type high-power charging device single-gun megawatt-level power distribution system according to claim 3, characterized in that, The power demand parameters include a rated power and a power conversion rate; The calculation formula of the first demand value is as follows: ； wherein is a first demand value, is a rated power, is a power conversion rate; When the charging power is distributed, the maximum charging power of the charging gun is inquired and recorded as a single-gun power; when the first demand value is greater than the single-gun power, the charging device distributes charging power to the charging gun, and the charging power is consistent with the single-gun power; When the first demand value is less than or equal to the single-gun power, the charging device distributes charging power to the charging gun, and the charging power is consistent with the first demand value.

5. The split type high-power charging device single-gun megawatt-level power distribution system according to claim 4, characterized in that, When the second demand value is calculated, the rated power and the power conversion rate of A batteries to be charged are collected, the first demand values of the A batteries to be charged are calculated, and the second demand value is obtained by adding the A first demand values one by one.

6. The split type high-power charging device single-gun megawatt-level power distribution system according to claim 5, characterized in that, The switching steps of the full-gun full-capacity state or the local distribution state are as follows: The maximum power supply power of the charging device at the current time is inquired through a charging server and recorded as a total power value, and the total power value is compared with the second demand value; When the total power value is greater than or equal to the second demand value, the charging state is switched to the full-gun full-capacity state; When the total power value is less than the second demand value, the charging state is switched to the local distribution state.

7. The split type high-power charging device single-gun megawatt-level power distribution system according to claim 6, characterized in that, The priority parameters include a single-price excess proportion, a user level value and a remaining power proportion; The division steps of the high-order batteries and the flat-order batteries are as follows: The single-price excess proportion, the user level value and the remaining power proportion of the A batteries to be charged are respectively given different proportion coefficients and compared to obtain A priority indexes; The priority indexes of the A batteries to be charged are compared with a calibrated priority threshold value in sequence; The calculation formula of the priority index is as follows: ； In the formula, is a priority index, is a user level value, , , are the proportional coefficients of the unitary excess proportion, the user level value and the residual power proportion, respectively. When the priority index is greater than or equal to the priority threshold, the battery to be charged is divided into a high-order battery, and B high-order batteries are obtained; When the priority index is less than the priority threshold, the battery to be charged is divided into a flat-order battery, and D flat-order batteries are obtained.

8. The split type high-power charging device single-gun megawatt-level power distribution system according to claim 7, characterized in that, The safety distribution criterion is that the battery to be charged is in a safe state as the basis; The steps of the high-order battery and the flat-order battery distributing charging power are: The first demand value of the B high-order batteries is compared with the single-gun power of the charging gun respectively; When the first demand value is greater than the single-gun power, the charging power consistent with the single-gun power is distributed to the high-order battery; When the first demand value is less than or equal to the single-gun power, the charging power consistent with the first demand value is distributed to the high-order battery; After the B high-order batteries are all distributed to the corresponding charging power, the remaining charging power of the charging device is evenly distributed to the D flat-order batteries.

9. The split type high-power charging device single-gun megawatt-level power distribution system according to claim 8, characterized in that, The determination steps of the surplus power are: The battery power ratio and the charging power of the B high-order batteries and the D flat-order batteries in the historical charging event are queried from the database respectively, and the power value and the power value are obtained; The power value is taken as the abscissa, and the power value is taken as the ordinate, and the power curve graph is drawn, the power value of any two adjacent points in the power curve graph is recorded as an identification unit, and the absolute value of the difference between the two power values in the identification unit is calculated, which is recorded as a power difference value; The identification unit with a power difference value greater than a calibrated difference value is recorded as a decay unit, and the smaller power value in the decay unit is recorded as a decay power value; The charging power of the high-order battery is subtracted from the decay power value, and the difference is taken as the surplus power of the high-order battery; When the charging power of the flat-order battery is greater than the decay power value, the charging power is subtracted from the decay power value, and the difference is recorded as the surplus power of the flat-order battery; when the charging power is less than or equal to the decay power value, the flat-order battery does not have surplus power.

10. A method for megawatt power distribution of a split high-power charging device single gun, applied to a charging server, based on the split high-power charging device single gun megawatt power distribution system of any one of claims 1-9, characterized in that, It includes: S01: Based on the basic operating parameters of the charging gun, the number of charging guns in the working state is counted, and the charging device is controlled to execute a single-gun distribution mode or a multi-gun distribution mode; If the single-gun distribution mode is executed, S02 is executed; if the multi-gun distribution mode is executed, S03 is executed; S02: Collect the power demand parameters of the battery to be charged, calculate the first demand value, and control the charging device to distribute charging power to the charging gun; S03: Calculate the second demand value of the battery to be charged, analyze the second demand value with the total power value, and control the charging device to switch to a full-gun full-capacity state or a local distribution state; if the full-gun full-capacity state is switched, S04 is executed; if the local distribution state is switched, S05 is executed; S04: Determine the power distribution value of the charging gun, and control the charging device to distribute charging power to the charging gun; S05: Collect the priority parameters of the battery to be charged, calculate the priority index, divide the battery to be charged into a high-order battery and a flat-order battery, and distribute charging power to the high-order battery and the flat-order battery based on the safety distribution criterion; S06: Determine the surplus power of the high-order battery and the flat-order battery, and redistribute the surplus power released by the high-order battery and the flat-order battery.

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