KR102763534B1 - Smart-charging and expandable using dispenser electric vehicle charging system - Google Patents

Abstract

The electric vehicle charging system of the present invention may include a main charger including a display unit that can be operated to switch between a plurality of operation modes by selecting one of the operation modes from the outside, a channel that supplies charging power to the electric vehicle, a main control unit that controls the entire charging process, a main communication unit that transmits and receives charging-related information with the outside, and a power module that converts power supplied to the main charger from a power system into charging power supplied to the electric vehicle, and the main charger may be charged in an integrated mode that controls a charging speed based on a state of charge (SOC) of a battery of the electric vehicle connected to the channel.

Description

{Smart-charging and expandable using dispenser electric vehicle charging system}

The present invention relates to an electric vehicle charging system capable of smart output based on the SOC of the electric vehicle and expandable to charge multiple electric vehicles using a dispenser.

Most of the existing literature has been about individual electric vehicle chargers that control the charging power of electric vehicles according to the state of charge (SOC) of the electric vehicle's battery or charge multiple electric vehicles using a dispenser more than the number of channels of the main charger.

For example, in a 1:N type electric vehicle charging system, there are many patents that utilize multiple dispensers, such as application number 10-2020-0188771 for an electric vehicle charging system including N dispensers individually connected to electric vehicles located in multiple parking spaces to perform electric charging, an electric supply device that supplies DC voltage and non-flammable refrigerant gas to each of the N dispensers, and a control server connected to the N dispensers and the electric supply device through a network, or application numbers 1020210074874 and 1020200127832 that attempt to use electric vehicle SOC information for control/charging methods, etc., by receiving SOC information of an electric vehicle to correct abnormal voltage or shorten a slow charging time.

The present invention can provide an electric vehicle charger that can adjust charging power based on SOC information of the electric vehicle being charged, while being capable of expanding the number of electric vehicles being charged using a dispenser connected from a main charger.

The electric vehicle charging system of the present invention may include a main charger including a display unit that can be operated to switch between a plurality of operation modes by selecting one of the operation modes from the outside, a channel that supplies charging power to the electric vehicle, a main control unit that controls the entire charging process, a main communication unit that transmits and receives charging-related information with the outside, and a power module that converts power supplied to the main charger from a power system into charging power supplied to the electric vehicle, and the main charger may be charged in an integrated mode that controls a charging speed based on a state of charge (SOC) of a battery of the electric vehicle connected to the channel.

The present invention can switch between an integrated mode for smart charging based on the SOC of an electric vehicle and an extended mode for increasing the number of electric vehicles being charged using a dispenser or delaying the charging time period, depending on the charging situation.

In this way, the present invention can provide improved charging efficiency by combining the existing SOC information-based charging method with the expansion of the charging number using a dispenser, thereby switching between an integrated mode using the channel of the main charger, a simultaneous mode using the main charger and the dispenser, and a sequential mode using multiple dispensers.

Figure 1 is a general description of the electric vehicle charging system of the present invention.
FIG. 2 is a diagram illustrating an electric vehicle charging system including an operating server of the present invention.
FIG. 3 shows examples of an integrated mode using smart charging of the present invention.
Figure 4 is an example of classification of charging speed in an integrated mode using smart charging of the present invention.
FIG. 5 shows examples of the integrated mode and extended mode of the present invention.
Figure 6 is a schematic diagram illustrating a mode using the main charger and dispensers of the present invention.
FIG. 7 is an embodiment of an electric vehicle charging system including one dispenser of the present invention.
FIG. 8 is an embodiment of an electric vehicle charging system including two dispensers of the present invention.

Using FIGS. 1 to 8, the electric vehicle charging system of the present invention is described.

The electric vehicle charging system of the present invention may include a main charger (100), a dispenser (200), or an operation server (90).

The main charger (100) and the dispenser (200) can be distinguished based on the presence or absence of a power module (160) that converts the power supplied to the main charger (100) from the power grid into charging power supplied to the electric vehicle (10:11,12,13,14), and the remaining components can be configured identically or similarly.

According to FIG. 1, for example, the main charger (100) and the dispenser (200) may include a display unit, a channel, a control unit, a communication unit, etc. as common components. The charging status unit (140), the mode selection unit (150), or the charging speed classification unit (180) are conveniently described as being included in the main charger (100), but even if at least some of them are installed in the dispenser (200), the contents described in this specification may be expanded and applied. Therefore, the biggest difference between the main charger (100) and the dispenser (200) is the dependency due to the existence of the power module (160).

The main charger (100) may include at least one of a display unit (110), a channel (120), a main control unit (130), a main communication unit (170), a charging status unit (140), a mode selection unit (150), a power module (160), and a charging speed classification unit (180).

The dispenser (200) can receive charging power from the main charger (100) and can have a function of expanding the number of electric vehicles (10) that can be charged. In this specification, for convenience of explanation, it is described that both the main charger (100) and the dispenser (200) are provided with two channels, but the number of channels of the main charger (100) and the dispenser (200) can also be expanded to a case where they are different. For example, the number of channels of the charger (100) is two, and two charging cables are provided, and the number of channels of the dispenser (200) is four, and four charging cables are provided.

The display unit (110) can be operated externally by a charger user or charger operator through a touch panel, etc., and the charger user or operator can switch between multiple operation modes or charging modes by selecting or setting one of the operation modes or charging modes through the display unit (110).

The channel (120) can be connected to the electric vehicle (10) to supply charging power. The channel (120) can include a charging cable (350), an inlet and an outlet through which the charging cable (350) is connected to the main body of the main charger (100), a delay for opening and closing the power of the charging cable (350), etc. The first channel (121) of the main charger (100), the first channel (221a) of the first dispenser (201), and the first channel (222a) of the second dispenser (202) are classified as group A, and thus, in the power transmission relationship between the main charger (100) and the dispenser (200), the channel and the charging cable can be used interchangeably depending on the situation.

In this specification, for convenience of explanation, an example is given where two channels are provided for each of the main charger (100) and the dispenser (200), but the invention can also be applied to cases where the number of channels is one or expanded to three or more.

The main control unit (130) can control the entire charging operation of the electric vehicle charging system of the present invention. The main control unit (130) can receive commands related to charger control from an external operation server (90) and can switch between modes according to the commands of the operation server (90).

From Fig. 2, the operation server (90) can manage a charging spot where one main charger (100) is installed, but it is also effective in managing multiple main chargers (100) of multiple charging spots that are spaced apart. Even when the operation server (90) is not present, a main control unit (130) that can control the entire electric vehicle charging system by itself may be required. If communication between the main charger (100) and the operation server (90) becomes unsatisfactory due to reasons such as communication failure, the system switches to a local automatic driving mode, and the main control unit (130) can operate the electric vehicle charging system by itself according to the charging logic (charging method, charging mode, etc.) that was previously operated during the communication failure.

The main communication unit (170) can exchange information with an external operation server (90) or dispenser communication unit (140) through a communication line (330).

The communication line (330) may include at least one of a first communication line (331) between the main charger (100) and the first-priority dispenser (201), a second communication line (332) between the main charger (100) and the second-priority dispenser (202), a third communication line (333) between the dispensers (201, 201), and a fourth communication line (334) between the main charger (100) and the operation server (90). That is, the main communication unit (170) may communicate with the operation server (90) (334) or communicate with the dispenser communication unit (140) via wired or wireless communication such as RS485, CAN, Modbus, or Ethernet via a LAN cable (331, 332).

When a mode selection operation, etc. is performed on the display unit (110) of the main charger (100) or the display unit (210) of the dispenser (200), the mode to be used can be determined by information transmission and reception between the main communication unit (170), the dispenser communication unit (240), etc. In addition, even if there is no operation through the display unit, when the charging cable (350) is connected to the electric vehicle (10), the display unit can notify that charging is performed in a mode set according to the situation, or the charging cable or channel connection method according to the situation can be notified and a suggestion can be made as to whether to charge as is.

As an example, the present invention can be charged in an integrated mode (S100) that is based on the battery state of charge (SOC, State Of Charging) of the electric vehicle (10) when there is no electric vehicle (10) connected to the dispenser (200) and charging is performed only with the main charger (100). However, when a user attempts to charge the dispenser (200) at a charging spot equipped with the main charger (100) and the main charger (100), even though there is no electric vehicle (10) to be charged with the main charger (100), the main control unit (130), the dispenser control unit (230), or the operation server (90) proceeds with charging in an extended mode (S200) instead of the integrated mode (S100). In this case, it can be compared that the charging power is lower compared to the integrated mode (S100), and thus the expected charging completion time may be somewhat delayed.

That is, even if there is no operation through the display unit (110, 210), when the electric vehicle (10) is connected to the channel (120, 220) of the main charger (100) or dispenser (200), charging in a preset operation mode according to the connection status can be indicated through the display unit (110, 2210), or a channel connection method according to the connection status can be notified or recommended.

In the case of sequential mode (S220) or sequential charging, if at least one of the grouped channels (120, 220) is in a charging state, the setting change through the display unit (110, 210) may not be made. In other words, the setting change through the display unit (110, 210) may be possible only when the status of all chargers in the grouped channel (120, 220) is in a charging standby state.

Meanwhile, in the case of simultaneous mode (S210) or simultaneous charging, if at least one of the grouped first channel group or second channel group is being charged, it can be charged at 120 kW (a value obtained by dividing the total charging capacity of the main charger (100) by the number of channels), and if at least two units in the first channel group or second channel group are being charged, the main charger (100) and the dispenser (200) (or the priority dispenser (201)) can be charged at 80 kW (between the highest charging speed and the lowest charging speed) and 40 kW (the lowest charging speed among the charging speeds of each channel), respectively.

In addition, in the case of simultaneous mode (S210) or simultaneous charging, if simultaneous charging mode selection is made on one of the display unit (110) of the main charger (100) and the display unit (200) of the dispenser (200), the remaining ones are automatically switched to simultaneous mode, and the remaining display units can also display that they are being charged in simultaneous charging or simultaneous mode.

When a sequential charging operation is performed on the display unit (211) of one (201) among the display units (211, 212) of the dispensers (201, 202) set to sequential charging, the remaining dispensers (202) are also automatically switched to the sequential mode, and the display units (212) of the remaining dispensers (202) can also display that they are being charged in sequential charging or sequential mode.

The charging status unit (140) can collect the battery state of charge (SOC) of an electric vehicle (10) connected to the main charger (100) or dispenser (200) and transmit it to the main control unit (130) or dispenser control unit (230). The SOC information exchange can be performed simultaneously with the connection of the charging cable (350) or through separate wireless communication equipment.

As an example of a charging method, the integrated mode (S100) performs smart charging based on SOC information, while the extended mode (S200) does not perform smart charging based on SOC information but uses a separate charging method, so that the charging status unit (140) can only operate in the integrated mode (S100). For example, in the case of charging an electric bus overnight at a charging spot of an electric bus company, compared to rapid charging at general electric vehicle charging spots, which are mostly fast charging, in the case of electric bus charging, it is sufficient to charge overnight and complete charging by the next morning, so that the charging status unit (140) operates for each of a plurality of electric buses extended by the dispenser (200), and the power required to exchange information can be reduced or time delays can be prevented.

For similar reasons, the present invention does not charge in parallel between multiple dispensers (200) but sequentially charges the dispensers (200) in the set order. At this time, it is not based on the SOC information of the connected electric vehicle (10), but rather, when the charging completion of the electric vehicle (10) with a higher priority is triggered, and when the charging of the electric vehicle (10) with a higher priority is completed, the charging of the electric vehicle (10) with a lower priority or the dispenser (200) can begin.

The power module (160) may be included in the main charger (100). In the embodiments of the modes of the present invention, such as those of FIGS. 3 and 5, it is convenient to explain that six power modules (160) with a capacity of 40 kW each are provided, but the contents described in this specification may be expanded and applied even if the capacity or number of the power modules (160) is changed.

When a user or operator of a charger sets one of the modes through the display unit (110), the mode selection unit (150) can switch between charging modes of the present invention, such as an integrated mode (S100), an extended mode (S200), a simultaneous mode (S210), and a sequential mode (S220), appropriately depending on the charging situation, and can display the result to the user or operator of the charger through the display unit (110).

In addition, even if the charger user or operator does not directly select the mode, when the charger user connects his or her electric vehicle (10) to one of the channels (120) of the main charger (100) or the channel (220) of the dispenser (200) for charging for the convenience of the user, the main control unit (130), the dispenser control unit (230), or the operation server (90) automatically sets the charging to a mode appropriate for the charging situation and proceeds with charging, and the result can be displayed to the charger user through the display unit (110).

The charging mode of the electric vehicle charging system may include an integrated mode (S100) or an extended mode (S200), and the extended mode (S200) may include a simultaneous mode (S210) or a sequential mode (S220).

The integrated mode (S100) may be a case where only the main charger (100) is provided and no dispenser (200) is provided, or a case where the dispenser (200) is provided but the electric vehicle (10) to be charged is not connected to the dispenser (200), so that only the main charger (100) is used as a charger.

Meanwhile, the dispenser expansion mode (S200) may be a case where a dispenser (200) is provided or an electric vehicle (10) to be charged is connected to the dispenser (200) and charging power is supplied to the dispenser (200) from the main charger (100).

In the integrated mode (S100), smart charging can be performed based on the SOC information of the electric vehicle (10), in the extended mode (S200), preset charging power can be supplied to the dispenser (200) or the electric vehicle (10) regardless of the SOC information of the connected electric vehicle (10), the simultaneous mode (S210) can be a charging method between the main charger (100) and a dispenser (201) designated as a priority, and the sequential mode (S220) can be a charging method between the main charger (100), a priority dispenser (201), and a lower priority dispenser (202). That is, in the sequential mode (S220), a time-series charging priority can be set between a plurality of dispensers.

An integrated mode (S100) using smart charging is described according to FIGS. 3 and 4.

The charging status unit (140) can divide the SOC of the electric vehicle (10) into multiple SOC sections using a reference value. For example, if two reference values of 40% and 80% are used, the SOC can be divided into three sections of 40% or less, 40 to 80%, and 80% or more, and if two charging channels (120) are installed in the main charger (100), the SOC can be divided into nine embodiments according to the three sections of the two channels, respectively. In expanded form, if the main charger (100) is divided into N-1 reference values and M-1 reference values for each of the two channels (120), the SOC can be divided into N sections and M sections, respectively, and can be divided into N * M embodiments. The number of channels of the main charger (100) can also be expanded to L. (N, M, L are natural numbers.) Each of these embodiments can be referred to as a channel operation mode. That is, the main control unit (130) can compare the SOC sections of electric vehicles (10) connected to each channel (120) of the main charger (110) to determine the charging power supplied to each channel (120).

The numbers of each embodiment in the table of Fig. 3 may be the charging speed according to Fig. 4. (a), (b), and (c) in the first row of the table may correspond to (a), (b), and (c) of Fig. 2.

The charging speed classification unit (180) can determine the charging speed according to the configuration of the power module (160) of the main charger (100). For example, if six power modules (160) with a capacity of 40 kW are provided, the charging speed classification unit (180) can classify the charging speed according to the capacity of each power module (160) into a first stage (low speed, 40 kW), a second stage (medium speed, 80 kW), a third stage (standard, 120 kW), a fourth stage (high speed, 160 kW), a fifth stage (ultra high speed, 200 kW), etc., based on a predetermined unit time. Here, the speed of 240 kW (*) in which all power modules (160) are turned on can be excluded.

In this way, even when the electric vehicle (10) is connected to only one channel (120), the entire charging capacity of the main charger (100) may not be fully used, and charging may be performed only at the charging speed of the previous stage (e.g., stage 5). The present invention does not assume a case in which no charging power is supplied at all according to the SOC section of each electric vehicle (10), and can charge at a charging speed of at least the lowest stage (stage 1). That is, the charging speed classification unit (180) may exclude a case in which all of the power modules (160) are turned ON when setting the charging speed, and may set a case in which at least one of the power modules (160) is turned ON as the lowest charging speed. The charging power supplied to the channel (120) of the main charger (100) may be set to at least the lowest charging speed or higher.

Accordingly, the present invention can have a feature of determining a charging speed such as low speed or high speed by comparing the SOCs of multiple electric vehicles (11, 12, etc.) when a second electric vehicle (12) is to be charged while the first electric vehicle (11) is being charged, and can have a feature of not charging at a stage where the charging speed is 0 and the charging speed is maximum and the power modules (160) are all turned on.

In the above-described embodiment, the charging speed classification unit (180) determines the charging speed for each unit of power module (160), but the standard for distinguishing the charging speed for units of two or more power modules (160) may be different.

By comparing the SOC between electric vehicles (10) connected to channels (121, 122), an electric vehicle with a relatively lower SOC can be charged at a relatively higher charging speed, i.e., an electric vehicle with a relatively higher SOC can be charged at a relatively lower charging speed.

If the number of sections for each SOC channel is the same, electric vehicles with matching SOC sections can be charged at the same charging speed. At this time, the same charging speed can be set to half (120 kW) of the total capacity (240 kW) of all power modules (160) of the main charger (100). Half can be set to the total capacity divided by L if it consists of L channels.

In summary, the main control unit (130) can compare the SOC sections of electric vehicles (100) connected to each channel (120) of the main charger (100) with each other to determine the charging power supplied to each channel (120). A channel with a relatively lower SOC section can be charged at a relatively higher charging speed, a channel with a relatively higher SOC section can be charged at a relatively lower charging speed, and channels with matching SOC sections can be charged at the same charging speed.

Fig. 5 shows the overall operation mode or charging mode (150) of the electric vehicle charging system of the present invention equipped with two dispensers (201, 202). Using examples (E1 to E10) of the extended mode (S200), the simultaneous mode (S210) and the sequential mode (S220) are described.

Embodiments E1 to E8 can be used to describe the simultaneous mode (S210), and embodiments E8 to E10 can be used to describe the sequential mode (S220).

Simultaneous mode (S210) can be implemented between the main charger (100) and the dispenser (200). Simultaneous charging (power sharing) may mean that charging is performed by distributing charging power simultaneously rather than charging after the charging of the one set to priority is completed compared to sequential mode.

On the other hand, the sequential mode (S220) can be implemented between multiple dispensers (200) having preset priorities. The meaning of the sequential mode may be that when the charging of the first electric vehicle (11) connected to the first dispenser (201) set to a higher priority is completely completed compared to the simultaneous mode, the charging of the second electric vehicle (12) connected to the second dispenser (202) set to a lower priority begins.

When one dispenser (200) is provided, only the simultaneous mode (S210) between the main charger (100) and the dispenser (200) can be performed. (E1 to E10)

When a plurality of dispensers (200) are provided, the simultaneous mode (S210) and the sequential mode (S220) can be performed simultaneously (E8 to E10). The simultaneous mode (S210) can be performed between the main charger (100) and the first dispenser (201) set as a priority (E8), and the second dispenser (202) set as a relatively lower priority can stand by without being charged. When the charging of the first electric vehicle (11) connected to the first dispenser (201) of the higher priority is completed, the charging of the second electric vehicle (12) connected to the second dispenser (202) of the lower priority can start (E9). Embodiment E10 can be a case where the charging of all electric vehicles connected to the main charger (100) is completed at E9, or the electric vehicle is charged only by the second dispenser (202) of the lower priority.

From Fig. 5, if the dispenser (201, 202) is not provided or charging power is not supplied to the dispenser (201, 202), an integrated mode (S100) that is smartly charged based on SOC information using only the main charger (100) can be operated.

When an electric vehicle (10) is connected to the dispenser (200), it switches to the dispenser expansion mode (S200) and the integrated mode (S100) of smart charging can be stopped.

E1 is when the electric vehicle (10) is connected only to the main charger (100). Even when the dispenser (200) is connected, if charging is performed only at the main charger (100), the integrated mode (S100) of smart charging can be performed. However, depending on the operator settings, the main control unit (130) or the dispenser control unit (230) can be set so that the extended mode (S200) is performed instead of the integrated mode (S100) even if charging is performed only at the main charger (100), such as when charging of the dispenser (200) is expected.

The above embodiment may also be a case where six power modules (160) each having a charging capacity of 40 kW are provided. In this case, the total capacity of the main charger (100) is 240 kW, and when only the main charger (100) is charged (E1), or when only the dispenser (201) is charged, charging can be performed at a charging speed of half (120 kW) of the total capacity (240 kW) of the main charger (100).

If only the main charger (100) is charged while the extended mode (S200) is set to the default state, the main control unit (130) can automatically switch to the integrated mode (S100) of smart charging to charge, unless it is set to operate in the extended mode (S200).

On the other hand, if it is set to operate in the extended mode (S200), the main control unit (130) can notify the user through the display unit (110) that the main charger (100) is currently set to the extended mode (S200), or can notify that it can be switched to the integrated mode (S100) using smart charging through mode selection.

This is because the charging speed may be set differently in integrated mode (S100) and extended mode (S200) even when only one device is being charged.

For example, in the case of the integrated mode (S100), even if only one unit is charged, the maximum charging speed is not set when all power modules (160) are turned ON, and the previous stage (e.g., stage 5, ultra-high speed, 200 kW) excluding the maximum possible charging speed (or maximum charging capacity) when all power modules (160) are turned ON can be set as the maximum charging speed stage.

On the other hand, in the case of extended mode (S200), even if only one unit is charged, the maximum charging capacity (maximum charging speed) (240 kW) of the main charger (100) for each channel can be set to half (120 kW). Here, half can be set to the total capacity divided by L if it consists of L channels.

Referring to FIGS. 6 to 8, the extended mode (S200) and grouping for each channel are described.

Figure 6 shows grouping by channel (group A, group B, etc.), Figure 7 shows a case where one dispenser (200) is provided, and Figure 8 shows a case where two dispensers (201, 202) are provided.

Figure 7 (a) corresponds to E6 in the embodiment of Figure 5 (Figure 5 is a table that summarizes the case of two dispensers as a whole, and may also include the case of one dispenser. E6' is used to mean the case of only one dispenser), and (b) may correspond to E8.

Fig. 8 shows a case where two charging cables (350) are required due to a high charging capacity, such as an electric bus, and can correspond to the sequential mode (S220) moving from embodiment E8 to E9 of Fig. 5.

The electric vehicle charging system of the present invention can group each channel between the main charger (100) and the dispenser (200), and distribute charging power only to each group.

For example, if the main charger (100) and the dispensers (201, 202) are equipped with two channels, the first channel (121) of the main charger (100), the first channel (221a) of the first dispenser (201), and the first channel (222a) of the second dispenser (202) may form a first group or group A. Similarly, the second channel (122) of the main charger (100), the second channel (221b) of the first dispenser (201), and the second channel (222b) of the second dispenser (202) may form a second group or group B.

That is, group A can distribute charging power only between the channels forming group A, and group B can distribute charging power only between the channels forming group B.

Each channel group (A, B) can distribute charging power internally by the connection part (310). That is, each dispenser (201, 202) can be equally connected in parallel so that the charging power transmission can be controlled by delay, but the charging power can be controlled by the connection part (311, 312) provided for each channel group (A, B).

The power line (320) may include a power line (321, 323) connecting the main charger (100) and the first dispenser (201) with the charging priority, or a power line (322, 324) branched from the power line (321, 323) through a connection part (311, 312) and connected to the second dispenser (202) with the charging priority.

The connecting portion (310) can be used to connect a power line (320) or a communication line (330).

The connection part (310) can distribute charging power between a plurality of dispensers (200) in a daisy chain connection, as an example. It can be a bus connection method that connects a first dispenser and a second dispenser, and connects the second dispenser and a third dispenser in series. In this case, energy can be saved by constructing a power grid or a communication network without distinguishing between input connectors and output connectors, and the addition and disassembly work of each component can be facilitated, a plurality of dispensers can be connected to a single Ethernet jack of the main charger, and can be utilized even when the distance between each dispenser is far, and can be suitable for most Modbus equipment that uses economical RS485 communication, and can reduce the occurrence of reflected waves or noise that cause communication failures such as signal distortion.

When an electric vehicle (10) is connected to the first channel (221a) of the first dispenser (201) and the first channel (222a) of the second dispenser (202) for charging and the first dispenser (201) is set to have a charging priority over the second dispenser (202), the charging power supplied to the first channel (121) of the main charger (100) can be supplied to the first channel (221a) of the first dispenser (201) with a higher priority along the first power line (321). When charging of the electric vehicle (10) connected to the first channel (221a) is completed, the charging power supplied from the first power line (321) can be supplied to the first channel (222a) of the second dispenser (202) with a lower priority through the second power line (322).

Similarly, when an electric vehicle (10) is connected for charging to the second channel (221b) of the first dispenser (201) and the second channel (222b) of the second dispenser (202), and the first dispenser (201) is set to have a charging priority over the second dispenser (202), the charging power supplied to the second channel (122) of the main charger (100) can be supplied to the second channel (221b) of the first dispenser (201) with a higher priority along the third power line (323). When charging of the electric vehicle (10) connected to the second channel (221b) is completed, the charging power supplied from the third power line (323) can be supplied to the second channel (222b) of the second dispenser (202) with a lower priority through the fourth power line (324).

In this way, the channel (120) of the main charger (100) and the channel (220) of the dispenser (200) can be grouped, and the charging power can be set to be mutually distributed only between the channels belonging to each channel group without mutually distributing the charging power between the grouped channels.

In order to compare the charging speed of the extended mode (S200) with the charging speed of the integrated mode (S100), the charging speed can be conveniently distinguished for each power module (160) in FIGS. 5 to 8. The case where one power module (160) is turned on can be referred to as the first stage (40 kW), which is the lowest charging speed, and the case where half of the total six power modules (160), three, are divided into each channel and two power modules (160) are turned on can be referred to as the second stage (80 kW), and the case where all three power modules (160) are turned on can be referred to as the third stage (120 kW), which is the maximum charging speed.

As in the case of the integrated mode (S100) based on SOC information, the number of classifications of charging speeds or the linkage between power modules (160) can be performed in units of multiple power modules (160) rather than in a single unit.

In this way, the charging speed of the extended mode (S200) is the same as that of the integrated mode (S100) in that it does not assume a charging speed of 0 in which all power modules (160) are turned off. That is, in the case where the main charger (100) and the priority dispenser (201) are charged simultaneously (S210) as in Example E6, the first channel (121) of the main charger (100) can be charged in the second stage (80 kW) and the first channel (221a) of the first dispenser (201) can be charged in the first stage (40 kW).

Here, even in the case of simultaneous mode (S210), the charging speed of the main charger (100) can be set faster than the charging speed of the dispenser (201). This may be more desirable in cases where rapid charging is not required immediately, such as at an electric bus charging spot, and where the electric bus (10) is parked overnight and extended charging using the dispenser (200) is acceptable even if the charging is delayed further.

There is a difference in that only the charging power which is the total charging capacity of the main charger (100) divided by the number of channels is supplied for each channel, and the maximum/highest charging speed (maximum/highest charging capacity) possible when all the power modules (160) distributed to each channel are turned ON is set as the maximum charging speed. In the expansion mode (S200), the power modules (160) are distributed for each channel, so that, like in the integrated mode (S100), there is no need to charge at a charging speed that is one step lower than the maximum possible charging speed even when only one vehicle is charged, in order to prevent an electric vehicle that is to be additionally charged in another channel from being charged at a speed of 0. From the embodiments E6 and E7 of FIG. 5, it can be seen that the main charger (100) does not unconditionally take priority over the dispenser (200), but that the charging power is distributed separately for each channel.

10,11,12,13,14... Electric car 90... Operating server
100... Main charger 110... Display part
120... Channel 121... Channel 1
122... 2nd channel 130... Main control unit
140... Charging status section 150... Mode selection section
160... Power module 170... Main communication unit
180... Charging speed classification 200... Dispenser
201... 1st dispenser 202... 2nd dispenser
210,211,212... Display section 220... Channel
221a,221b... Channel 1 222a,222b... Channel 2
230... Dispenser control unit 240... Dispenser communication unit
310,311,312... connector 320,321,322,323,324... power line
330,331,332,333,340... communication lines
350,351,352,353,354,355,356... charging cable
S100... All-in-one mode S200... Extended mode
S210... Simultaneous mode S220... Sequential mode

Claims (19)

A main charger including a channel for supplying charging power to an electric vehicle and a power module for converting power supplied from a power grid into charging power supplied to an electric vehicle;
A dispenser that supplies charging power from the main charger to expand the number of electric vehicles that can be charged;
If there is no electric vehicle connected to the above dispenser and charging is only done with the main charger, charging is done in an integrated mode that adjusts the charging power based on the battery state of charge (SOC) of the electric vehicle connected to the main charger.
When charging starts from the above dispenser, it switches to an extended mode that charges the electric vehicle connected to the main charger and dispenser with a preset charging power regardless of the SOC of the electric vehicle.
An electric vehicle charging system that switches from the integrated mode to the extended mode when charging is attempted at the dispenser even though there is no electric vehicle to be charged at the main charger, and provides a comparison that the charging power is lower or the expected charging completion time is delayed compared to the integrated mode.
In the first paragraph,
The above extended mode is an electric vehicle charging system including a simultaneous mode in which charging is performed simultaneously between the main charger and the dispenser, or a sequential mode in which charging is performed sequentially between multiple dispensers.
In the first paragraph,
The channels of the above main charger and the channels of the above dispenser are grouped,
An electric vehicle charging system in which charging power is not mutually distributed between grouped channel groups, but is set to mutually distribute charging power only between the channels belonging to each channel group.
In the first paragraph,
From the above integrated mode, it switches to an extended mode including a simultaneous mode of charging between the main charger and the dispenser,
An electric vehicle charging system, wherein, in the above simultaneous mode, the charging speed of the main charger is set faster than the charging speed of the dispenser.
In the first paragraph,
Includes a charging status unit that collects the SOC of an electric vehicle connected to the main charger and transmits it to a main control unit that controls the entire charging process.
The above charging status section divides the SOC of the electric vehicle into multiple SOC sections based on a reference value.
The above main control unit is an electric vehicle charging system that compares the SOC sections of electric vehicles connected to each channel of the main charger to determine the charging power supplied to each channel.
In the first paragraph,
Includes a charging status unit that collects the SOC of an electric vehicle connected to the main charger and transmits it to a main control unit that controls the entire charging process.
The above charging status section divides the SOC of the electric vehicle into multiple SOC sections based on a reference value.
The above main control unit compares the SOC sections of electric vehicles connected to each channel of the main charger to determine the charging power supplied to each channel.
An electric vehicle charging system in which a channel with a relatively low SOC section is charged at a relatively high charging rate, a channel with a relatively high SOC section is charged at a relatively low charging rate, and channels with matching SOC sections are charged at the same charging rate.
In the first paragraph,
A time-series charging priority is set between the plurality of above dispensers,
The above extended mode includes a simultaneous mode in which charging is performed simultaneously between the main charger and the dispenser, or a sequential mode in which charging is performed sequentially between multiple dispensers.
The above simultaneous mode is a charging method between the main charger and the priority dispenser,
The above sequential mode is an electric vehicle charging system that is a charging method between the above first-priority dispenser and the second-priority dispenser.
In the first paragraph,
The above extended mode includes a simultaneous mode in which charging is performed simultaneously between the main charger and the dispenser, or a sequential mode in which charging is performed sequentially between multiple dispensers.
The above sequential mode is not based on the SOC information of the electric vehicle being charged, and is an electric vehicle charging system in which, when the charging of the electric vehicle connected to the dispenser set with the highest priority is completed, the charging of the electric vehicle connected to the dispenser set with the lowest priority begins.
In the first paragraph,
Includes a charging status unit that collects the SOC of an electric vehicle connected to the main charger and transmits it to the main control unit,
The above charging status section divides the SOC of the electric vehicle into multiple SOC sections based on a reference value.
The above main control unit sets the channel operation mode by combining the SOC sections for each channel,
The channels of the above main charger include the first channel and the second channel,
An electric vehicle charging system in which N * M channel operation modes are set, when the first channel is divided into N sections and the second channel is divided into M sections.
In the first paragraph,
Includes a charging speed classification unit that determines the charging speed of each channel according to the configuration of the power module provided in the main charger.
The above charging speed classification unit sets the lowest charging speed when at least one of the above power modules is turned on.
The charging power supplied to the channel of the above main charger is set at least higher than the minimum charging speed,
The above charging speed classification unit is an electric vehicle charging system that excludes the charging speed when all of the power modules are turned on from the charging speed classification.
In the first paragraph,
Includes an operation server that transmits and receives information from the main communication unit and issues commands to the main control unit,
If communication between the main charger and the operating server is not smooth due to reasons such as communication failure, the main charger switches to local automatic driving mode.
An electric vehicle charging system including a main control unit that operates the main charger independently according to the charging method previously operated during a communication outage.
In the first paragraph,
An electric vehicle charging system in which, in the above expansion mode, when charging is performed only through one channel of the main charger or the dispenser, the channel is charged by dividing the total charging capacity of the main charger by the number of channels.
In the first paragraph,
The above extended mode includes a simultaneous mode in which charging is performed simultaneously between the main charger and the dispenser, or a sequential mode in which charging is performed sequentially between multiple dispensers.
A channel group is set in which the channels of the above main charger and the channels of the dispenser are grouped.
In the above simultaneous mode, if any one of the grouped channel groups is charging, the total charging capacity of the main charger is divided by the number of channels, and
An electric vehicle charging system in which, when both the main charger and the dispenser are charging, the main charger is charged at a speed between the maximum charging speed and the minimum charging speed, and the dispenser is charged at the minimum charging speed.
In the first paragraph,
The above dispensers are provided in multiple units so that the sequential charging order is set.
It includes a first power line connecting the main charger and the first dispenser with the charging priority, and a second power line branched from the first power line and connected to the second dispenser with the charging priority.
It includes a connecting portion for branching the second power line from the first power line,
The above connection part is an electric vehicle charging system that distributes charging power between multiple dispensers in a daisy chain connection manner.
In the first paragraph,
In the above expansion mode, the power modules are distributed to each channel of the main charger,
An electric vehicle charging system in which each channel of the above main charger is turned on to charge at the highest speed when all of the above power modules are turned on.
In the first paragraph,
When an operation including selection of an operation mode is performed on the display unit of the main charger or the display unit of the dispenser, the operation mode to be used is determined by information transmission and reception between the main communication unit or the dispenser communication unit.
An electric vehicle charging system that displays through a display unit that charging is performed in a preset operation mode according to the connection status when an electric vehicle is connected to a channel of the main charger or dispenser even without any operation through the display unit, or notifies or recommends a channel connection method according to the connection status.
In the first paragraph,
The above extended mode includes a simultaneous mode in which charging is performed simultaneously between the main charger and the dispenser, or a sequential mode in which charging is performed sequentially between multiple dispensers.
A channel group is set in which the channels of the above main charger and the channels of the dispenser are grouped.
An electric vehicle charging system in which, in the above sequential mode, if at least one of the grouped channel groups is in a charging state, the settings cannot be changed through the display unit of the main charger or the display unit of the dispenser, and the settings can be changed only when all chargers in the grouped channel group are in a charging standby state.
In the first paragraph,
The above extended mode includes a simultaneous mode in which charging is performed simultaneously between the main charger and the dispenser, or a sequential mode in which charging is performed sequentially between multiple dispensers.
An electric vehicle charging system in which, when the simultaneous mode is selected on either the display section of the main charger or the display section of the dispenser, the remaining ones are automatically switched to the simultaneous mode, and the remaining display sections also indicate that charging is being done in the simultaneous mode.
In the first paragraph,
The above extended mode includes a simultaneous mode in which charging is performed simultaneously between the main charger and the dispenser, or a sequential mode in which charging is performed sequentially between multiple dispensers.
An electric vehicle charging system in which, when the sequential mode is selected on one of the display units of a plurality of dispensers set to the sequential mode, the remaining dispensers are also automatically switched to the sequential mode, and the display units of the remaining dispensers also display that they are being charged in the sequential mode.