CN110782591A - Charging gun linkage complementary method of multi-head charging pile - Google Patents
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Abstract
The invention provides a charging gun linkage complementation method of a multi-head charging pile, which is characterized in that a plurality of charging guns are arranged in one charging pile, when the charging guns carry out charging operation, the charging method comprises the steps of recording corresponding charging power according to the same time axis, adding the charging power of all charging guns to obtain the total load power of the charging pile, calculating surplus charging power by using the rated power and the total load power of the charging pile, and finally controlling the charging power of each operating charging gun and the charging power of each newly added charging gun in real time by taking the surplus charging power as a power distribution reference of the charging pile, so that the purpose that the surplus charging power can be distributed to other charging guns by a single charging gun in a low-power charging stage, and the charging pile with the same rated charging power can support more charging operations is achieved.
Description
Technical Field
The invention belongs to the technical field of charging pile power distribution control, and particularly relates to a charging gun linkage complementation method of a multi-head charging pile.
Background
The function of the charging pile is similar to that of an oiling machine in a gas station, and the charging pile can be fixed on the ground or on the wall, is installed in public buildings (public buildings, shopping malls, public parking lots and the like) and residential area parking lots or charging stations, and can charge various types of electric vehicles according to different voltage levels. The input end of the charging pile is directly connected with an alternating current power grid, and the output end of the charging pile is provided with a charging plug for charging the electric automobile. Fill electric pile and generally provide two kinds of charging methods of conventional charging and quick charge, people can use specific charging card to swipe the card and use on the human-computer interaction operation interface that fills electric pile and provide, carry out operations such as corresponding charging method, charging time, expense data printing, fill electric pile display screen and can show data such as the charge volume, expense, charging time.
The present electric pile that fills is mostly single-end charging pile, and every fills electric pile only has a rifle or the socket that charges, and each fills electric pile all has its rated power, but in the actual charging process, actual charging power is a dynamic change process, especially current intelligent charging, quick charge etc. and the change of height difference can appear in charging power. In order to meet the charging requirement of the battery, the rated power of the charging pile must be larger than the rated charging power of the battery, that is, in the initial pre-charging stage and the stage of low power such as the relaxation charging when the charging pile is close to full charge, the rated power of the charging pile is far larger than the actual charging power, that is, a large amount of charging power is surplus, which causes the waste of resources to some extent.
Disclosure of Invention
For the convenience of understanding the technical scheme of the present invention, some terms in the technical scheme of the present invention are explicitly defined herein:
1. rated charging power (voltage, current) of charging pile: that is, the rated power (voltage, current) set in the production design of the charging pile is an inherent characteristic of the charging pile.
2. Battery rated charging power (voltage, current): that is, the rated charging power (voltage, current) set at the time of production design of the battery is an inherent characteristic of the battery.
3. Total load power (voltage, current): i.e. the sum of the actual load power (voltage, current) of all charging guns and charging sockets at the same time.
4. Surplus charging power: and subtracting the total load power from the rated charging power (namely the maximum charging power) of the charging pile to obtain surplus charging power, namely the charging power of the charging pile capable of loading.
5. Quick charging: compared with non-rapid charging, the charging method has higher charging speed, and the specific process is that 10% of rated charging current of the battery is firstly adopted for pre-charging until the voltage of the battery reaches a pre-charging voltage threshold value, then the charging current is increased to the rated charging current of the battery for constant-current charging until the voltage of the battery reaches the rated voltage, finally the charging voltage is kept unchanged for constant-voltage charging, and when the charging current is reduced to 10% of the rated charging current of the battery, the charging is completed.
6. Non-fast charging: compared with the situation that the charging speed of the 'quick charging' is slow, the 'quick charging' process is preferentially adopted in the whole charging process, and the surplus charging power is adopted for charging when the surplus charging power cannot meet the requirement of the 'quick charging' in the charging process.
Based on the problem of resource waste in the prior art, the invention provides a charging gun linkage complementation method for a multi-head charging pile, which is characterized in that a plurality of charging guns are arranged in one charging pile, the charging guns record corresponding charging powers according to the same time axis when performing charging operation, the charging powers of all the charging guns are added to obtain the total load power of the charging pile, the surplus charging power is calculated by utilizing the rated power and the total load power of the charging pile, and finally the surplus charging power is used as the power distribution reference of the charging pile to control the charging power of each operating charging gun and each newly added charging gun in real time, so that the purposes that the surplus charging power can be distributed to other charging guns in the low-power charging stage by a single charging gun, the charging pile with the same rated charging power can support more charging operations are achieved Fully utilizes charging resources and saves space.
The invention achieves the above purpose through the following detailed technical scheme:
a charging gun linkage complementary method of a multi-head charging pile is characterized in that a plurality of charging guns are arranged in one charging pile, when the charging guns carry out charging operation, corresponding charging power is recorded according to the same time axis, the charging power of all the charging guns is added to obtain the total load power of the charging pile, surplus charging power is calculated by utilizing the rated power and the total load power of the charging pile, and finally the surplus charging power is used as a power distribution reference of the charging pile to control the charging power of each operating charging gun and the charging power of each newly-added charging gun in real time, and the method specifically comprises the following steps:
step S10, logging in a user account, selecting the type of a battery to be charged according to the actual situation, calling a standard charging current change curve corresponding to the type of the battery from a database by a charging pile according to the type of the battery, comparing a charging current change curve with a surplus charging current change curve corresponding to surplus charging power of the charging pile, and executing step S20 if the battery charging current change curve is lower than the surplus charging current; if the battery charging current variation curve and the surplus charging current have an intersection point, executing the step S30; if the variation curve of the battery charging current is higher than the surplus charging current, executing step S40;
step S20, charging the battery stage by stage, firstly pre-charging by adopting 10% of rated charging current of the battery until the voltage of the battery reaches the pre-charging voltage threshold, then increasing the charging current to the rated charging current of the battery to perform constant current charging until the voltage of the battery reaches the rated voltage, and finally keeping the charging voltage unchanged to perform constant voltage charging until the charging current is reduced to 10% of the rated charging current of the battery to finish charging;
step S30, a non-quick charging confirmation prompt is sent to the user, after the user confirms the acceptance, when the change curve of the charging current of the battery is lower than the surplus charging current change curve, the battery is charged by adopting the staged charging mode of the step S20, and when the change curve of the charging current of the battery is higher than the surplus charging current change curve, the maximum surplus current left by the charging pile is used for charging;
step S40, the charging pile main control unit calculates waiting time according to the standard charging current change data and surplus charging current change data of the selected battery in the database, and sends a waiting signal and waiting time to the user;
and step S50, which is executed in the whole charging process, detects and records the data of the charging current, the charging voltage and the battery voltage in real time, calculates the real-time charging power, the surplus charging power and the surplus charging current at the same time, and plots the change curve graphs of the charging current, the charging voltage, the battery voltage, the real-time charging power, the surplus charging power and the surplus charging current by using the same time axis.
The step S10 further includes a step S11, in which the user enters specifications of relevant parameters of the battery, including a rated charge/discharge voltage, a rated charge/discharge current, a charge/discharge temperature, and a charge/discharge power, according to actual conditions, and the charging pile enters types of commonly used batteries and relevant parameters in advance in a production stage, but some of the infrequent batteries need to be entered by himself, so that the deficiencies of files and supplementary databases are conveniently established.
In order to reduce the operation burden of the charging pile main control unit, a sub-step may be added in step S10: the charging pile main control unit compares the rated charging power and the total surplus power of the battery according to the battery type selected by a user, and if the rated charging power is smaller than the total surplus power, a traditional charging control method is adopted, namely charging power which is equal to the rated charging power of the battery is distributed to a charging gun connected with the battery for charging; if the rated charging power is larger than the total surplus power, continuing to execute the step S10, and when the rated charging power of the battery is smaller than the total surplus power, representing that a larger amount of surplus power exists in the charging pile, at the moment, a complex power distribution operation method is not needed, the operation workload of the main control unit is reduced, the energy consumption can be reduced to a certain extent, the operation capability can be distributed to data analysis by the main control unit, and a more accurate data base is analyzed and calculated; if the computing power of the charging pile main control unit is sufficient, the step S10 may be directly executed without adding this sub-step.
Wherein, the steps S30 and S40 further include step S31 of sending a priority charging request confirmation signal to the new user, after the new user confirms, the charging post broadcasts and sends a priority charging request to all users using the charging post, if the user agrees, the new user exchanges the charging priority order with the device agreeing to the user with priority charging, the device of the new user enters into the fast charging process, the user agreeing to give priority charging continues to execute the steps S30 and S40, so that the user with emergency charging can request help from other users, such as the charging post arranged near the office building, the person on duty can have the charging time of a whole day, the person on duty or the person going out urgently can have more abundant time, the other people can be charged preferentially, and in the actual execution process, a reward rule can be added, the incentives give away charging priority.
Step S30 further includes step S32, where the charging pile main control unit establishes a data file for each electric device of each user according to the electric device set by the user, and separately records charging data of the electric device, including voltage, charging current, and charging time at two ends of the battery, and forms a separate data time variation curve graph, and establishes a separate data file, so that charging waiting time and other personalized analysis and judgment can be more accurately judged, and an actual data basis can be provided for big data analysis.
In step S10 and step S40, the method further includes the steps of determining, by the charging pile master control unit, whether an independent data file exists in the database of the device to be charged, and if so, comparing, in step S10, the standard charging current change curve and the surplus charging current change curve are replaced by an independent charging current time change curve generated in the independent data file; step S40 performs the calculation of the waiting time using the individual charging current variation data in the independent data file instead of the standard charging current variation data and the surplus charging current variation data.
The step S50 further includes a step S51, in which the charging pile main control unit compares the charging data of the current charging of the electric device with the previous charging data after each charging is completed, analyzes the battery aging condition of the electric device, and sends the analysis result to the user terminal.
The invention has the following beneficial effects:
1. fill electric pile cooperation with the bull and adopt battery charging current variation curve and surplus charging current variation curve to make the contrast, judge whether the rifle that charges that newly launches has sufficient charging power according to the contrast result, for traditional one a stake a rifle mode, be equivalent to and transfer the surplus charging power of the rifle that charges to new rifle, make the stake of filling under the same power can support more rifle that charges.
2. Independent data archives are established for analysis, more accurate analysis is carried out to the data of battery condition, charging time and latency etc, and after one of them rifle that charges that uses one of them electric pile to charge simultaneously, the high in the clouds can be sent to data, and other electric piles carry out information sharing, make to charge more conveniently and intelligent.
Drawings
Fig. 1 is a flowchart of a charging gun linkage complementation method of a multi-head charging pile.
Fig. 2 is a schematic diagram showing a battery charging current variation curve lower than a surplus charging current curve.
Fig. 3 is a schematic diagram showing the intersection point of the battery charging current variation curve and the surplus charging current curve.
Fig. 4 is a schematic diagram showing a battery charging current variation curve higher than a surplus charging current curve.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
A charging gun linkage complementary method of a multi-head charging pile is characterized in that a plurality of charging guns are arranged in one charging pile, when the charging guns carry out charging operation, corresponding charging power is recorded according to the same time axis, the charging power of all the charging guns is added to obtain the total load power of the charging pile, surplus charging power is calculated by utilizing the rated power and the total load power of the charging pile, and finally the surplus charging power is used as a power distribution reference of the charging pile to control the charging power of each operating charging gun and the charging power of each newly-added charging gun in real time, and the method specifically comprises the following steps:
step S10, logging in a user account, selecting a battery type to be charged according to an actual situation or automatically recording relevant parameter specifications of the battery according to the actual situation, calling a standard charging current change curve chart corresponding to the battery type from a database by a charging pile according to the battery type, calling relevant data from a network database or adopting relevant data of battery types with approximate parameters through big data analysis if the battery type is the automatically recorded battery type, comparing a charging current change curve with a surplus charging current change curve corresponding to surplus charging power of the charging pile, and executing step S20 if the battery charging current change curve is lower than the surplus charging current as shown in FIG. 2; as shown in fig. 3, if there is an intersection between the battery charging current variation curve and the surplus charging current, step S30 is executed; as shown in fig. 4, if the variation curve of the charging current of the battery is higher than the surplus charging current, step S40 is executed, for example, the rated charging current of one battery is 2A, and the rated charging current of the charging pile is 10A, in the conventional control method, the charging pile can accommodate 5 charging guns at the same time, each gun distributes 2A current, but in the pre-charging stage, each battery actually only needs 0.2A current, and the rest of power is in the idle state; if the method of the patent is adopted, if two batteries are in a constant current charging stage, the two batteries are in a pre-charging stage, and one is in a finished constant voltage charging stage, the load power of the actual charging pile is 4.4-6.4A (2 +2+0.2+0.2+ A, the current in the constant voltage stage is gradually reduced from the rated current), and the surplus charging current is 3.6-5.6A and is greater than the rated charging current of the batteries, so that one more battery can be connected, and the charging resources are fully utilized;
step S20, charging the battery stage by stage, firstly pre-charging by adopting 10% of rated charging current of the battery until the voltage of the battery reaches the pre-charging voltage threshold, then increasing the charging current to the rated charging current of the battery to perform constant current charging until the voltage of the battery reaches the rated voltage, and finally keeping the charging voltage unchanged to perform constant voltage charging until the charging current is reduced to 10% of the rated charging current of the battery to finish charging;
step S30, a non-quick charging confirmation prompt is sent to the user, after the user confirms the acceptance, when the change curve of the charging current of the battery is lower than the surplus charging current change curve, the battery is charged by adopting the staged charging mode of the step S20, and when the change curve of the charging current of the battery is higher than the surplus charging current change curve, the maximum surplus current left by the charging pile is used for charging;
step S40, the charging pile main control unit calculates waiting time according to the standard charging current change data and surplus charging current change data of the selected battery in the database, and sends a waiting signal and waiting time to the user;
step S50, executed in the whole charging process, detecting and recording data of charging current, charging voltage and battery voltage in real time, calculating real-time charging power, surplus charging power and surplus charging current, and drawing a change curve graph of charging current, charging voltage, battery voltage, real-time charging power, surplus charging power and surplus charging current with the same time axis, after each charging, the charging pile main control unit compares the charging data of the current charging of the electric equipment with the previous charging data, analyzes the battery aging condition of the electric equipment, and determines whether the battery is aged or has other abnormal conditions if the charging time is obviously shortened or the full voltage is abnormal, and sends the analysis result to the user terminal.
As a preferred embodiment, the step S10 further includes a step S12, where the charging pile main control unit compares the rated charging power and the total surplus power of the battery according to the battery type selected by the user, and if the rated charging power is smaller than the total surplus power, a conventional charging control method is adopted; if the rated charging power is greater than the total surplus power, the process continues to step S10.
As a preferred embodiment, the steps S30 and S40 further include a step S31 of sending a priority charging request confirmation signal to the new user, after the new user confirms, the charging post broadcasts and sends a priority charging request to all users who are using the charging post, if the user agrees, the new user and the device agreeing to the user with priority charging exchange the charging priority order, the device of the new user enters a fast charging process, and the user agreeing to priority charging continues to execute the steps S30 and S40.
As a preferred embodiment, the step S30 further includes a step S32, where the charging pile main control unit creates a data file for each electric device of each user according to the electric device set by the user, and separately records charging data of the electric device, including voltage across the battery, charging voltage, charging current and charging time, and forms a separate data time variation graph.
As a preferred embodiment, the steps S10 and S40 further include the step of determining, by the main control unit of the charging pile, whether the device to be charged has an independent data file in the database, and if so, the step S10 comparing the standard charging current variation curve with the surplus charging current variation curve with the single charging current time variation curve generated in the independent data file; step S40 performs the calculation of the waiting time using the individual charging current variation data in the independent data file instead of the standard charging current variation data and the surplus charging current variation data.
The charging pile adopting the charging gun linkage complementation method comprises a main control unit, a charging unit, a power distribution control unit, a detection unit, an auxiliary power supply and a plurality of charging guns; the input end of the charging unit is connected with a power grid, and the output end of the charging unit is connected with a plurality of charging guns which are connected in parallel; the detection unit detects the voltage, the charging voltage and the charging current at two ends of the battery to be charged, is in communication connection with the power distribution control unit and the main control unit, and sends detection data to the power distribution control unit and the main control unit; the power distribution control unit is in communication connection with the main control unit, the main control unit sends a control instruction to the power distribution control unit, and the power distribution control unit controls and distributes electric energy output to each charging gun from the charging unit; the auxiliary power supply provides working power supply for each unit module of the charging pile; the main control unit is integrated with a communication module, is in communication connection with the charging unit, the power distribution control unit, the detection unit, the auxiliary power supply and the plurality of charging guns, and is connected to the cloud server through the communication module; the rifle that charges on be provided with parallel connection's charging plug, the socket and the automatic rifle lock that charges, the automatic rifle lock that charges by auxiliary power supply energy supply and communication connection to main control unit, open and close by main control unit control, follow the rifle through the automatic rifle lock locking that charges on filling the electric pile shell.
The above-mentioned embodiments only express one embodiment of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. A charging gun linkage complementation method of a multi-head charging pile is characterized in that a plurality of charging guns are arranged in one charging pile, when the charging guns carry out charging operation, corresponding charging power is recorded according to the same time axis, the charging power of all the charging guns is added to obtain the total load power of the charging pile, surplus charging power is calculated by utilizing the rated power and the total load power of the charging pile, and finally, the surplus charging power is used as a power distribution reference of the charging pile, the charging power of each operating charging gun and the charging power of each newly added charging gun are controlled in real time, and the method specifically comprises the following steps:
step S10, logging in a user account, selecting the type of a battery to be charged according to the actual situation, calling a standard charging current change curve corresponding to the type of the battery from a database by a charging pile according to the type of the battery, comparing a charging current change curve with a surplus charging current change curve corresponding to surplus charging power of the charging pile, and executing step S20 if the battery charging current change curve is lower than the surplus charging current; if the battery charging current variation curve and the surplus charging current have an intersection point, executing the step S30; if the variation curve of the battery charging current is higher than the surplus charging current, executing step S40;
step S20, charging the battery stage by stage, firstly pre-charging by adopting 10% of rated charging current of the battery until the voltage of the battery reaches the pre-charging voltage threshold, then increasing the charging current to the rated charging current of the battery to perform constant current charging until the voltage of the battery reaches the rated voltage, and finally keeping the charging voltage unchanged to perform constant voltage charging until the charging current is reduced to 10% of the rated charging current of the battery to finish charging;
step S30, a non-quick charging confirmation prompt is sent to the user, after the user confirms the acceptance, when the change curve of the charging current of the battery is lower than the surplus charging current change curve, the battery is charged by adopting the staged charging mode of the step S20, and when the change curve of the charging current of the battery is higher than the surplus charging current change curve, the maximum surplus current left by the charging pile is used for charging;
step S40, the charging pile main control unit calculates waiting time according to the standard charging current change data and surplus charging current change data of the selected battery in the database, and sends a waiting signal and waiting time to the user;
and step S50, which is executed in the whole charging process, detects and records the data of the charging current, the charging voltage and the battery voltage in real time, calculates the real-time charging power, the surplus charging power and the surplus charging current at the same time, and plots the change curve graphs of the charging current, the charging voltage, the battery voltage, the real-time charging power, the surplus charging power and the surplus charging current by using the same time axis.
2. The charging gun linkage complementation method for a multi-head charging pile according to claim 1, wherein the step S10 further comprises a step S11, in which the user enters the relevant parameters of the battery according to the actual situation.
3. The method as claimed in claim 2, wherein the steps S30 and S40 further include a step S31 of sending a priority charging request confirmation signal to the new user, after the confirmation of the new user, the charging post broadcasting a priority charging request to all users using the charging post, if the user agrees, the new user and the device agreeing to the user with priority charging interchange the charging priority order, the device of the new user enters a fast charging process, and the user agreeing to priority charging continues to execute the steps S30 and S40.
4. The method as claimed in claim 3, wherein the step S30 further includes a step S32, the charging post main control unit creates a data file for each user' S electric device according to the electric device set by the user, and records the charging data of the electric device individually, including the voltage across the battery, the charging voltage, the charging current and the charging time, and forms an individual data time variation graph.
5. The charging gun linkage complementation method of a multi-head charging pile according to claim 4, wherein the steps S10 and S40 further comprise the steps of determining whether an independent data file exists in the database of the device to be charged by the main control unit of the charging pile, and if so, comparing a standard charging current change curve with a surplus charging current change curve by using an independent charging current time change curve generated in the independent data file in the step S10; step S40 performs the calculation of the waiting time using the individual charging current variation data in the independent data file instead of the standard charging current variation data and the surplus charging current variation data.
6. The charging gun linkage complementation method of the multi-head charging pile according to claim 5, characterized in that the step S50 further comprises a step S51, the charging pile main control unit compares the charging data of the current charging of the electric equipment with the previous charging data after each charging, analyzes the battery aging condition of the electric equipment, and sends the analysis result to the user terminal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112277674A (en) * | 2020-10-19 | 2021-01-29 | 西安特锐德智能充电科技有限公司 | Charging control method, device, equipment and storage medium |
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