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

Abstract

The application relates to the technical field of battery charging, and discloses a split type large-power charging equipment single-gun megawatt power distribution system and method; the system comprises a mode distribution module, a single-gun execution module, a state switching module, a full-capacity distribution module, a step distribution module and a surplus distribution module; the mode distribution module executes a single-gun distribution mode or a multi-gun distribution mode; the single-gun execution module distributes charging power to the charging gun; the state switching module switches to a full-gun full-capacity state or a local distribution state; the full-capacity distribution module distributes charging power to the charging gun; the step distribution module distributes charging power to high-order batteries and flat-order batteries; and the surplus distribution module redistributes the released surplus power; the application can avoid the irreversible damage to the batteries caused by the long-time high charging power of part of the to-be-charged batteries, can timely redistribute the surplus power of the to-be-charged batteries in a high power state to other to-be-charged batteries with low charging power, and ensures that all the to-be-charged batteries can be charged as soon as possible and safely.

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, it is necessary to use a split type high-power charging equipment 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.

[0004] 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 real time during the charging process, 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.

[0005] In view of this, 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

[0006] 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:

[0007] 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 a single-gun distribution mode or a multi-gun distribution mode;

[0008] The single-gun execution module collects the 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;

[0009] 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 device to switch to a full-gun full-capacity state or a local distribution state;

[0010] The full-capacity distribution module determines the power distribution value of the charging gun and controls the charging device to distribute charging power to the charging gun;

[0011] The step-by-step distribution module collects the 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 flat-order batteries based on a safety distribution criterion;

[0012] The surplus distribution module determines the surplus power of the high-order batteries and flat-order batteries and redistributes the surplus power released by the high-order batteries and flat-order batteries.

[0013] Further, the basic operating parameters include switch state values, fault state values, real-time power values, and real-time current values;

[0014] The state of the charging gun in which the switch 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 the working state.

[0015] Further, the execution steps of the single-gun distribution mode or the multi-gun distribution mode are:

[0016] The number of charging guns in the working state is counted as the effective charging amount;

[0017] When the effective charging amount is 1, the charging device executes the single-gun distribution mode;

[0018] When the effective charging amount is greater than 1, the charging device executes the multi-gun distribution mode.

[0019] Further, the power demand parameters include the rated power and the power conversion rate;

[0020] The calculation formula of the first demand value is:

[0021] ;

[0022] In the formula, is the first demand value, is the rated power, is the power conversion rate;

[0023] When the charging power is distributed, the maximum charging power of the charging gun is queried and recorded as single-gun power. When the first demand value is greater than the single-gun power, the charging device distributes the charging power consistent with the single-gun power to the charging gun;

[0024] When the first demand value is less than or equal to the single-gun power, the charging device distributes the charging power consistent with the first demand value to the charging gun.

[0025] Further, when the second demand value is calculated, the rated power and power conversion rate of A batteries to be charged are collected, the first demand value of the A batteries to be charged is calculated, and the A first demand values are added one by one to obtain the second demand value.

[0026] Further, the switching step of the full-gun full-capacity state or the local distribution state is:

[0027] The maximum power supply power of the charging device at the current time is queried through the charging server and recorded as a total power value, and the total power value is compared with the second demand value;

[0028] 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;

[0029] When the total power value is less than the second demand value, the charging state is switched to the local distribution state.

[0030] Further, the priority parameters include the single price excess proportion, the user level value and the remaining power proportion;

[0031] The division step of the high-order battery and the flat-order battery is:

[0032] The single price excess proportion, the user level value and the remaining power proportion of the A batteries to be charged are respectively assigned to different proportion coefficients and compared to obtain A priority indexes;

[0033] The priority indexes of the A batteries to be charged are compared with the calibrated priority threshold value in turn;

[0034] The calculation formula of the priority index is:

[0035] ;

[0036] In the formula, is the priority index, is the user level value, , , The proportion coefficients of the single price excess proportion, the user level value and the remaining power proportion respectively;

[0037] When the priority index is greater than or equal to the priority threshold value, the battery to be charged is divided into a high-order battery, and B high-order batteries are obtained;

[0038] When the priority index is less than the priority threshold, the battery to be charged is divided into a flat battery, and D flat batteries are obtained.

[0039] Further, the safety distribution criterion is that the battery to be charged is in a safe state as the basis;

[0040] The steps of distributing charging power to the high-order battery and the flat battery are:

[0041] The first demand value of the B high-order batteries is compared with the single-gun power of the charging gun respectively;

[0042] 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;

[0043] 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;

[0044] 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 batteries.

[0045] Further, the determination step of the surplus power is:

[0046] The battery capacity ratio and the charging power of the B high-order batteries and the D flat batteries in the historical charging event are queried from the database respectively, and the capacity value and the power value are obtained;

[0047] The capacity-power curve graph is drawn with the capacity value as the abscissa and the power value as the ordinate, the power values of any two adjacent points in the capacity-power curve graph are recorded as the identification unit, and the absolute value of the difference between the two power values in the identification unit is calculated, which is recorded as the power difference value;

[0048] The identification unit with a power difference value greater than the calibrated difference value is recorded as the attenuation unit, and the smaller power value in the attenuation unit is recorded as the attenuation power value;

[0049] The charging power of the high-order battery is subtracted from the attenuation power value, and the difference value is taken as the surplus power of the high-order battery;

[0050] When the charging power of the flat battery is greater than the attenuation power value, the charging power is subtracted from the attenuation power value, and the difference value is recorded as the surplus power of the flat battery; when the charging power is less than or equal to the attenuation power value, the flat battery has no surplus power.

[0051] The single-gun megawatt power distribution method of the split type high-power charging device is applied to the charging server and realized based on the single-gun megawatt power distribution system of the split type high-power charging device, and includes:

[0052] S01: based on the basic operating parameters of the charging gun, the number of working state charging guns is counted, and the charging equipment is controlled to execute single-gun distribution mode or multi-gun distribution mode; if single-gun distribution mode is executed, S02 is executed; if multi-gun distribution mode is executed, S03 is executed;

[0053] S02: the power demand parameters of the battery to be charged are collected, the first demand value is calculated, and the charging equipment is controlled to distribute charging power to the charging gun;

[0054] S03: the second demand value of the battery to be charged is calculated, the second demand value is analyzed with the total power value, and the charging equipment is controlled to switch to full-gun full-capacity state or local distribution state; if full-gun full-capacity state is switched, S04 is executed; if local distribution state is switched, S05 is executed;

[0055] 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;

[0056] S05: the priority parameters of the battery to be charged are collected, the priority index is calculated, the battery to be charged is divided into high-order battery and flat-order battery, and based on the safety distribution criterion, the charging power is distributed to the high-order battery and the flat-order battery;

[0057] S06: the surplus power of the high-order battery and the flat-order battery is determined, and the surplus power released by the high-order battery and the flat-order battery is redistributed.

[0058] The technical effects and advantages of the split type high-power charging equipment single-gun megawatt power distribution system and method are as follows:

[0059] (1) The charging equipment is controlled to execute single-gun distribution mode or multi-gun distribution mode, and the charging equipment is controlled to switch to full-gun full-capacity state or local distribution state, which can realize single-gun independent charging and multi-gun synchronous charging according to the number of working state charging guns on the charging equipment, meet the adaptive power distribution demand of different number of charging guns, and also can reasonably and accurately control the charging equipment 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 as to realize different effects under the conditions of full power distribution and non-full power distribution of the charging gun, ensure that the charging equipment can adaptively adjust and control the power distribution from two dimensions of the number and power demand of the actual charging gun, and improve the application range of the charging equipment.

[0060] (2): the application can arrange the charging priority level of the battery to be charged according to the charging priority level of the battery to be charged, and can monitor and analyze the charging process of the charging device in real time and dynamically, and release and recover the charging power when the battery to be charged reaches the preset condition, which can avoid irreversible damage to the battery caused by long-time high charging power of part of the battery to be charged, improve the charging safety of the battery to be charged, and also can timely redistribute the excess power of the battery to be charged in the high power state to other batteries to be charged with low charging power, ensure that all batteries to be charged can be charged as soon as possible and safely, and ensure that the charging power of the charging device can be dynamically, efficiently and reasonably distributed, and the phenomenon of waste of charging power is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0061] Figure 1 The architecture schematic diagram of the split type high-power charging equipment single-gun megawatt power distribution system provided by the embodiment one of the application is shown in the figure.

[0062] Figure 2 The power curve provided by the embodiment one of the application is shown in the figure.

[0063] Figure 3 The flowchart of the split type high-power charging equipment single-gun megawatt power distribution method provided by the embodiment two of the application is shown in the figure. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0065] Embodiment one: please refer to Figures 1-2 The split type high-power charging equipment single-gun megawatt power distribution system described in the embodiment is applied to a charging server, which comprises:

[0066] The mode distribution module, in the device starting state, real-time queries the basic running parameters of the charging gun, counts the number of charging guns in the working state, and controls the charging device to execute the corresponding power distribution mode, the power distribution mode includes single-gun distribution mode and multi-gun distribution mode;

[0067] The split type high-power charging equipment refers to a split type charging equipment including a high-power power supply cabinet and multiple independent charging guns. Single gun megawatt indicates that the maximum charging power of a single charging gun can reach the power range of megawatt, thereby meeting the charging needs of heavy mechanical equipment loaded with large-capacity batteries.

[0068] The basic operation parameter refers to a related parameter of the charging gun at the current time that will affect normal charging, and serves as a basic parameter for judging whether the charging gun at the current time is kept in a normal charging state. When collecting the basic operation parameter, it is necessary to ensure that the charging equipment is in a starting state, and the prerequisite for the charging equipment being in the starting state is that the charging gun has generated corresponding parameter changes;

[0069] The basic operation parameter includes a switch state value, a fault state value, a real-time power value and a real-time current value. Specifically, the switch state value is used to represent the result of the on-off state of the charging line of the charging gun at the current time. The on-off state includes an open state and a 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.

[0070] 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, the number of real-time charging faults of the charging gun can be represented.

[0071] The real-time power value and the real-time current value respectively refer to the working power and the working current of the charging gun at the current time, that is, the power and the current size of the charging gun can be represented.

[0072] 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 equipment.

[0073] After the basic operation parameters of the charging gun are queried, the basic operation parameters can be used as the basis to judge whether the charging gun is in a working state. When the charging gun is in a working state, the charging gun at this time can normally and safely charge the battery connected thereto, so it is necessary for 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 to meet the corresponding requirements.

[0074] In the embodiment, when judging whether the charging gun is in a working state, the state of the switch state value of the charging gun being 11, the fault state value being 0, the real-time power value being greater than the power lower limit value, and the real-time current value being greater than the current lower limit value is recorded as the 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 when the charging gun is 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 when the charging gun is in the working state.

[0075] 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.

[0076] 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 requirements of one charging gun and multiple charging guns.

[0077] 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.

[0078] The execution steps of the power distribution mode are as follows:

[0079] The number of charging guns in the working state is counted and recorded as the effective charging amount.

[0080] When the effective charging amount is 1, it indicates that only one charging gun of the charging device is in the working state, at this time, the charging device performs the single-gun distribution mode.

[0081] When the effective charging amount is greater than 1, it indicates that more than one charging gun of the charging device is in the working state, at this time, the charging device performs the multi-gun distribution mode.

[0082] 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, therefore, the charging device will not perform the single-gun distribution mode or the multi-gun distribution mode, and still maintains the current state unchanged; the subsequent technical solutions in the embodiment are based on the execution of the single-gun distribution mode or the multi-gun distribution mode, therefore, the case of the effective charging amount being 0 is not considered.

[0083] The single-gun execution module collects the power demand parameter of the battery to be charged, calculates the first demand value, and controls the charging device to distribute the charging power to the charging gun under the single-gun distribution mode.

[0084] 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 the power supply power does not need to be considered, therefore, only the maximum power that the battery to be charged connected with the charging gun can withstand needs to be considered, and the maximum power that the battery to be charged can withstand is recorded as a first demand value;

[0085] 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 charging the battery to be charged;

[0086] 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.

[0087] 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:

[0088]

[0089] In the formula, is the first demand value, is the rated power, is the power conversion rate.

[0090] 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 power-distributed according to the comparison result;

[0091] Specifically, after the first demand value is calculated, the maximum charging power of the charging gun is queried and 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 charging device distributes the charging power consistent with the size of the single-gun power to the charging gun; when the first demand value is less than or equal to the single-gun power, the charging device distributes the charging power consistent with the size of the first demand value to the charging gun.

[0092] ​It should be noted that the single-gun charging power of the charging device in the embodiment can reach the megawatt level, so that the maximum charging power of a single charging gun is at least 1000KW, and the maximum charging power allowed by the battery to be charged connected with the charging gun in a safe state can 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 by the battery to be charged in a safe state.

[0093] The state switching module collects the power demand parameters of the battery to be charged in the multi-gun distribution mode, calculates a second demand value, and performs full-capacity analysis on the second demand value, and controls the charging device to switch the charging state according to the analysis result; the charging state includes a full-gun full-capacity state and a local distribution state.

[0094] When in the multi-gun distribution mode, multiple charging guns need to be charged at this time, the situation that other charging guns will snatch power supply needs to be considered, therefore, the sum of the maximum power that the batteries to be charged connected with the multiple charging guns can withstand needs to be considered, and the sum of the maximum power that the multiple batteries to be charged can withstand is recorded as a second demand value.

[0095] When calculating the second demand value, the power demand parameters of the battery to be charged also need to be collected first to calculate the power required by each battery to be charged, and the sum of the maximum power that the multiple batteries to be charged can withstand is calculated after the power required by the multiple batteries to be charged is added, and recorded as the second demand value.

[0096] Specifically, when calculating the second demand value, the rated power and the power conversion rate need to be collected first, and the first demand value of A batteries to be charged is calculated by the above-mentioned calculation method of the first demand value, and the second demand value is obtained after the A first demand values are added.

[0097] Specifically, the calculation formula of the second demand value is:

[0098] ;

[0099] In the formula, is the second demand value, is the rated power of the i-th battery to be charged, is the power conversion rate of the i-th battery to be charged.

[0100] ​​After the second demand value is calculated, the second demand value of the A to-be-charged batteries can be compared with the maximum value of the charging power that the charging device can provide to perform full analysis on the second demand value, so as to determine whether the A to-be-charged batteries can all be charged in the state of full charging power, and according to the result of the full analysis, the control of the charging device entering different charging states is performed;

[0101] The charging state is used to represent the result of the current charging power of the charging gun connected with the to-be-charged battery, and serves as a prerequisite for the power distribution of the subsequent A charging guns;

[0102] 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 the to-be-charged batteries connected with the A charging guns are all connected in the state of 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 to-be-charged batteries, and the local distribution state refers to the state that the to-be-charged batteries connected with the A charging guns are not all connected in the state of 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 to-be-charged batteries.

[0103] The switching method of the charging state is:

[0104] 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;

[0105] 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 the full charging power of the A charging guns, and the charging state is switched to the full gun full state;

[0106] When the total power value is less than the second demand value, at this time, the charging device cannot meet the demand of the full charging power of the A charging guns, and the charging state is switched to the local distribution state.

[0107] It should be noted that when all the charging guns are in the state of maximum charging power, 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.

[0108] The full distribution module determines the power distribution value of each charging gun in the full gun full state, and controls the charging device to distribute the corresponding charging power to the charging gun;

[0109] When in the full gun full state, all the to-be-charged batteries 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 to-be-charged batteries respectively, so as to ensure that the A to-be-charged batteries can all be kept in the state of rated power for charging;

[0110] Specifically, in the determination of the power allocation value of the charging gun, the maximum charging power of the charging gun is queried, denoted 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 single-gun power is taken as the power allocation 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 allocation value.

[0111] It should be noted that the power allocation value of the charging gun is actually the charging power when the battery to be charged is safely charged, and after the power allocation value of the A charging guns is determined, the charging device can allocate charging power to the A charging guns consistent with the power allocation value, and full charging of the A batteries to be charged in a safe state is realized through the A charging guns, ensuring that the A batteries to be charged can be kept in the best and safe state.

[0112] The step distribution module collects the priority parameters of each battery to be charged in the local distribution state, calculates the priority index of the battery to be charged, and divides the battery to be charged into high-order batteries and flat-order batteries, and allocates corresponding charging power to the high-order batteries and flat-order batteries based on the safety distribution criterion;

[0113] When in the local distribution state, not all batteries to be charged can be kept in the best and safe state for charging, and the charging device needs to allocate corresponding power to the A charging guns connected to the A batteries to be charged to realize the ordered charging of the A batteries to be charged;

[0114] Since the allocatable power of the charging device cannot meet the condition that the A batteries to be charged are all in the rated power state, it is necessary to calculate and sort the power allocated to the A batteries to be charged, and to adjust the power allocated to the A batteries to be charged based on the calculation and sorting results.

[0115] Since the charging guns corresponding to the A batteries to be charged may be in different electricity prices, user levels, emergency levels and other factors during charging, the charging power allocated to different batteries to be charged may differ in size when the charging power of the charging device is allocated, in order to clarify the differences between the batteries to be charged and determine the charging power allocated to each battery to be charged, it is necessary to calculate the priority index of the battery to be charged, so that the priority index can be used as a numerical basis for distinguishing the levels of the batteries to be charged, and the allocation power of each battery to be charged is determined in turn;

[0116] In the calculation of the priority index, the priority parameters of the battery to be charged are first collected, so that the priority parameters can be used as the influence parameters reflecting the priority level of the battery to be charged when the power is allocated;

[0117] Specifically, the priority parameter includes a unit price excess proportion, a user level value, and a residual power proportion.

[0118] The unit price excess proportion refers to a proportion of a real-time unit price selected by the battery to be charged when the charging gun corresponding to the battery to be charged is charging and exceeding a benchmark unit price, that is, the unit price excess proportion can represent an excess proportion of the electricity fee paid by the battery to be charged in real time when the battery to be charged is charging. When the unit price excess proportion is larger, the priority index of the battery to be charged is larger, and the priority order of full-amount charging is earlier.

[0119] Specifically, when the unit price excess proportion is collected, first, A charging unit prices selected by A batteries to be charged when the charging gun is charging are queried respectively to obtain A real-time unit prices. Then, the A real-time unit prices are compared with the benchmark unit price one by one to obtain A unit price difference values. Finally, the A unit price difference values are compared with the benchmark unit price in sequence to calculate A unit price excess proportions. The benchmark unit price refers to the lowest charging unit price when normal charging is performed on the charging device, and the benchmark unit price is obtained by querying the charging server.

[0120] The calculation formula of the unit price excess proportion is:

[0121] ;

[0122] In the formula, P represents the unit price excess proportion, P represents the real-time unit price, and P represents the benchmark unit price.

[0123] The user level value refers to a level value of an account user corresponding to the battery to be charged when the charging gun is connected to the battery to be charged, that is, the user level value can represent the value size of the account user of the battery to be charged. When the user level value is larger, the priority index of the battery to be charged is larger, and the priority order of full-amount charging is earlier.

[0124] Specifically, when the user level value is collected, the level data of the account user corresponding to the battery to be charged is queried one by one by the charging server, and the digital part in the level data is recorded as the user level value.

[0125] The residual power proportion refers to a ratio between a residual power and a total power of the battery to be charged when the charging gun is connected to the battery to be charged, that is, the residual power proportion can represent the size of the residual power of the battery to be charged. When the residual power proportion is larger, it indicates that the priority index of the battery to be charged is smaller, and the priority order of full-amount charging is later.

[0126] Specifically, when the residual power proportion is collected, the residual powers of A batteries to be charged at the current time are queried one by one, and the residual powers are compared with the total powers of the A batteries to be charged to calculate A residual power proportions.

[0127] The calculation formula of the residual power proportion is:​​​

[0128] ;

[0129] In the formula, is the remaining power ratio, is the remaining power, is the total amount of the battery.

[0130] After the priority parameters of the to-be-charged batteries are collected, the priority index of the to-be-charged battery can be calculated based on the priority parameters;

[0131] Specifically, the calculation steps of the priority index are as follows:

[0132] The unit price excess ratio, the user level value and the remaining power ratio of the A to-be-charged batteries are respectively assigned different proportion coefficients and compared to obtain A priority indexes;

[0133] The calculation formula of the priority index is as follows:

[0134] ;

[0135] In the formula, is the priority index, is the user level value, , , are the proportion coefficients of the unit price excess ratio, the user level value and the remaining power ratio respectively, and .

[0136] After the priority index of the to-be-charged battery is calculated, the priority order of the 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;

[0137] The high-order battery refers to a to-be-charged battery that can be charged at a large power, so that the high-order battery can be charged at the maximum power in a safe state, and the flat-order battery refers to a to-be-charged battery that cannot be charged at the maximum power in a safe state.

[0138] The division steps of the high-order battery and the flat-order battery are as follows:

[0139] The priority indexes of the A to-be-charged batteries are compared with the calibrated priority threshold value in sequence;

[0140] When the priority index is greater than or equal to the priority threshold value, the priority level of the to-be-charged battery for full-charge is higher than the basic level at this time, and the to-be-charged battery is divided into a high-order battery to obtain B high-order batteries;

[0141] When the priority index is less than the priority threshold value, at this time, the priority level of the battery to be charged for full charging is consistent with the basic level, the battery to be charged is divided into flat batteries, and D flat batteries are obtained.

[0142] 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 battery to be charged is fully charged, that is, it can provide accurate numerical basis for the division of high-order batteries and flat batteries, and ensure the accuracy of the division of high-order batteries and flat batteries. 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.

[0143] After the high-order batteries and flat batteries are divided, the maximum charging power that the charging device can provide can be distributed to the high-order batteries and flat batteries according to certain distribution criteria. In order to ensure the accuracy of the power distribution of high-order batteries and flat batteries, the power distribution operation needs to be performed under the limitation of the safety distribution criteria.

[0144] Specifically, the safety distribution criteria are: taking the battery to be charged in a safe state as the benchmark; that is, it can ensure that high-order batteries and flat batteries can be orderly and reasonably distributed to the corresponding charging power.

[0145] The step of distributing charging power to high-order batteries and flat batteries is:

[0146] The first demand value of the B high-order batteries is compared with the single-gun power of the corresponding charging gun.

[0147] When the first demand value is greater than the single-gun power, at this time, the charging power required by the high-order battery is greater than the maximum charging power of the charging gun, and the charging power consistent with the single-gun power is distributed to the high-order battery.

[0148] When the first demand value is less than or equal to the single-gun power, at this time, the charging power required by the high-order battery is less than or equal to the maximum charging power of the charging gun, and the charging power consistent with the first demand value is distributed to the high-order battery.

[0149] 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 batteries.

[0150] It should be noted that since the B high-order batteries are distributed to the charging power, the maximum charging power distributed to them 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 distributed. Therefore, after the B high-order batteries are all distributed to the corresponding charging power, a certain amount of charging power will be left on the charging device, that is, the remaining charging power on the charging device can be evenly distributed to the D flat batteries.

[0151] a surplus power distribution module, which determines surplus power of the high-order batteries and the flat-order batteries, releases the surplus power when the high-order batteries and the flat-order batteries reach the power attenuation time, and redistributes the released surplus power;

[0152] The surplus power refers to the power released by the high-order batteries and the flat-order batteries when the charging power decreases at the power attenuation time, so that the surplus power can be recovered into the charging device again and be redistributed to other high-order batteries and flat-order batteries.

[0153] Specifically, the determination of the surplus power comprises the following steps:

[0154] The database is queried to obtain the battery capacity ratio and the corresponding charging power of the B high-order batteries and the D flat-order batteries in the historical charging event, so as to obtain the capacity value and the power value.

[0155] The capacity value is taken as the horizontal coordinate and the power value is taken as the vertical coordinate, and a capacity-power curve is drawn.

[0156] The power values corresponding to any two adjacent points in the capacity-power curve are taken 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 the power difference.

[0157] The identification unit with a power difference greater than the calibration difference is recorded as an attenuation unit, and the smaller power value in the attenuation unit is recorded as the attenuation power value. The calibration difference refers to the minimum value of the absolute value of the difference between the two power values recorded as the attenuation unit, which can be used as a basis for determining whether the power value in the identification unit contains the attenuation power value. Specifically, the calibration difference is obtained by averaging the minimum value of the absolute value of the difference between the two power values recorded as the attenuation unit after collecting a large number of historical data.

[0158] The charging power of the high-order battery is compared with the attenuation power value, and the difference is taken as the surplus power of the high-order battery.

[0159] The charging power of the flat-order 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-order battery.

[0160] When the charging power is less than or equal to the attenuation power value, the flat-order battery does not have surplus power.

[0161] It should be noted that when there is no surplus power in the flat-order battery, the flat-order battery will not have a power attenuation time and will not release surplus power. The flat-order battery can only receive surplus power released by other high-order batteries and flat-order batteries.

[0162] According to the above method of drawing the power curve, the power values and the capacity values of the high-order battery and the flat-order battery are queried, and the power value and the capacity value of one of the high-order batteries are selected to draw the power curve, as shown in Figure 2 The maximum charging power of the high-order battery in the safe state is 800KW, and the decay power value is 270KW.

[0163] The power decay time is the time when the charging power of the high-order battery and the flat-order battery drops sharply during the charging process, and is used as the time basis for the charging power of the high-order battery and the flat-order battery to change greatly.

[0164] When determining whether the power decay time is reached, only the power values of the high-order battery and the flat-order battery need to be monitored in real time, and the time when the power values of the high-order battery and the flat-order battery reach the decay power value for the first time is recorded as the power decay time.

[0165] After determining the surplus power of the high-order battery and the flat-order battery, the capacity values of the high-order battery and the flat-order battery can be detected in real time, and when the high-order battery or the flat-order battery reaches the power decay time for the first time, the surplus power on the high-order battery or the flat-order 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 dynamic redistribution effect of the charging power of the high-order battery and the flat-order battery.

[0166] Embodiment two: please refer to Figure 3 The part not described in detail in this embodiment is described in embodiment one. The single-gun megawatt power distribution method of the split type high-power charging device is provided, applied to a charging server, and realized based on a single-gun megawatt power distribution system of the split type high-power charging device, comprising:

[0167] 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;

[0168] S02: The power demand parameters of the battery to be charged are collected, the first demand value is calculated, and the charging device is controlled to distribute the charging power to the charging gun;

[0169] S03: The second demand value of the battery to be charged is calculated, the second demand value is analyzed with the total power value, and the charging device 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;

[0170] S04: determining the power distribution value of the charging gun, and controlling the charging device to distribute the charging power to the charging gun;

[0171] S05: collecting the priority parameters of the battery to be charged, calculating the priority index, dividing the battery to be charged into high-order batteries and flat-order batteries, and distributing the charging power to the high-order batteries and the flat-order batteries based on the safety distribution criterion;

[0172] S06: determining the surplus power of the high-order batteries and the flat-order batteries, and redistributing the surplus power released by the high-order batteries and the flat-order batteries.

[0173] 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 is used for counting the number of charging guns in a working state based on basic operation parameters of the charging guns, and controlling the charging device to execute a single-gun distribution mode or a multi-gun distribution mode. The single-gun execution module is used for collecting power demand parameters of the battery to be charged in the single-gun distribution mode, calculating a first demand value, and controlling the charging device to distribute charging power to the charging gun. The power demand parameters include rated power and power conversion rate. The first demand value is calculated according to the following formula: ； wherein is a first demand value, is a rated power, is a power conversion rate; When distributing the charging power, the maximum charging power of the charging gun is inquired and recorded as 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. The state switching module is used for calculating a second demand value of the battery to be charged in the multi-gun distribution mode, analyzing the second demand value and a total power value, and controlling the charging device to switch to a full-gun full-capacity state or a local distribution state. When calculating the second demand value, 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 first demand values are added one by one to obtain the second demand value. 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 the 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. The full-capacity distribution module is used for determining the power distribution value of the charging gun in the full-gun full-capacity state, and controlling the charging device to distribute charging power to the charging gun. The step-by-step distribution module is used for collecting priority parameters of the battery to be charged in the local distribution state, calculating a priority index, dividing the battery to be charged into high-order batteries and flat-order batteries, and distributing charging power to the high-order batteries and the flat-order batteries based on a safety distribution criterion. The priority parameters include a unit 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 unit 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. ； In the formula, is a priority index, is a unit excess proportion, is a user level value, is a remaining power proportion, , , are proportion coefficients of the unit excess proportion, the user level value, and the remaining power proportion, respectively; The priority index is calculated according to the following formula: ； In the formula, is the real-time unit price, is the benchmark unit price; The unit price excess proportion is calculated according to the following formula: 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. ； wherein is the remaining power, is the total battery power; The remaining power proportion is calculated according to the following formula: When the priority index is greater than or equal to the priority threshold value, the battery to be charged is divided into the high-order battery, and B high-order batteries are obtained. When the priority index is less than the priority threshold value, the battery to be charged is divided into the flat-order battery, and D flat-order batteries are obtained. The safety distribution criterion is that the battery to be charged is in a safe state. The steps of distributing charging power to the high-order batteries and the flat-order batteries are as follows: The first demand values of the B high-order batteries are compared with the single-gun power of the charging gun. When the first demand value is greater than the single-gun power, the high-order battery is allocated the charging power consistent with the single-gun power; When the first demand value is less than or equal to the single-gun power, the high-order battery is allocated the charging power consistent with the first demand value; After the B high-order batteries are all allocated to the corresponding charging power, the charging device remaining charging power is evenly allocated to the D flat-order batteries; The surplus allocation module determines the surplus power of the high-order battery and the flat-order battery, and reallocates the surplus power released by the high-order battery and the flat-order battery.

2. The split type high-power charging device single-gun megawatt-level power distribution system according to claim 1, characterized in that, The basic operating parameters include switch state value, fault state value, real-time power value and real-time current value; The state of the charging gun in which the switch 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 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 allocation mode or the multi-gun allocation mode are: The number of charging guns in the working state is counted, which is recorded as the effective charging amount; When the effective charging amount is 1, the charging device executes the single-gun allocation mode; When the effective charging amount is greater than 1, the charging device executes the multi-gun allocation mode.

4. The split type high-power charging device single-gun megawatt-level power distribution system according to claim 3, 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 through the database respectively to obtain the power value and the power value. The power difference value is calculated as the absolute value of the difference between the two power values in the identification unit, and is recorded as the power difference value. The identification unit with a power difference value greater than the calibration difference value is recorded as the attenuation unit, and the smaller power value in the attenuation unit is recorded as the attenuation power value. The charging power of the high-order battery is subtracted from the attenuation 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 attenuation power value, the charging power is subtracted from the attenuation 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 attenuation power value, the flat-order battery does not have surplus power.

5. The method for megawatt power distribution of single gun of split type high-power charging equipment, applied to a charging server, is characterized in that, the method is implemented based on the megawatt power distribution system of single gun of split type high-power charging equipment according to any one of claims 1-4. 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 the single-gun allocation mode or the multi-gun allocation mode; If the single-gun allocation mode is executed, S02 is executed; if the multi-gun allocation mode is executed, S03 is executed; S02: In the single-gun allocation mode, the power demand parameters of the battery to be charged are collected, the first demand value is calculated, and the charging device is controlled to allocate charging power to the charging gun; S03: In the multi-gun allocation mode, the second demand value of the battery to be charged is calculated, the second demand value is analyzed with the total power value, and the charging device is controlled to switch to the full-gun full-capacity state or the 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: In the full-gun full-capacity state, the power allocation value of the charging gun is determined, and the charging device is controlled to allocate charging power to the charging gun; S05: In the local distribution state, the priority parameters of the battery to be charged are collected, the priority index is calculated, the battery to be charged is divided into high-order battery and flat-order battery, and the charging power is distributed 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.

Images