JP2013090416A - Charging facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce charging time to batteries in a plurality of electric automobiles.SOLUTION: A charging facility includes: a plurality of feeding wirings 32 that allow separate batteries to be connected to a plurality of power supply parts 31; a coupling wiring 33 to establish a connection between the feeding wirings 32; change-over switches 34a and 34b for turning on/off electrification on the individual wirings; and switch control means 35 that controls the turning on/off of the change-over switches 34a and 34b. When performing feeding to a battery to be charged, the switch control means 35 disconnects the change-over switch 34b disposed on the coupling wiring 33 when a current value necessary for charging the battery reaches a predetermined value. Then, the switch control means 35 turns on the change-over switch 34a(2) disposed on the feeding wiring 32(2) in order to start feeding from the power supply part 31(2), in which the feeding is stopped by the disconnection, to a new feeding path connected to another battery other than the battery to be charged.

Description

  The present invention relates to a charging facility for charging a battery mounted on a moving body.

  Recently, a charging facility for charging a battery (secondary battery) mounted on a moving body such as an electric vehicle or a mobile power supply device is becoming popular. As an application example of this charging facility, an electric vehicle is popularized. For this purpose, there are charging stations installed in various places under the initiative of local governments. The charging facility provided in the charging stand is for charging a driving battery mounted on an electric vehicle.

  By the way, it takes time to charge the battery for driving the electric vehicle, and it takes about 30 minutes to complete the charging of one battery of the electric vehicle even if the charging is rapid (for example, the output is about 44 to 50 kW). It is. Since the user must wait near the charging facility until the charging is completed, in order to promote the spread of the charging facility, it is necessary to shorten the waiting time of the user until the charging is completed, that is, charging is required. It is essential to shorten the time (charging time). In particular, in a charging facility in which the batteries of multiple electric vehicles are sequentially charged, the waiting time until the charging of the battery starts and the charging time are combined for the electric vehicles whose charging order is second or later. For this reason, the user may have to wait considerably.

  As an example of the charging facility, Patent Literature 1 describes a charging facility (charging device) that can charge a plurality of batteries (secondary batteries) in parallel. Further, in Patent Document 1, a plurality of DC stabilized power supplies are provided in an output distribution unit of a charging facility (charging device) in order to output electric power for charging. It is described that the combination of a battery and a plurality of direct current stabilized power supplies mounted on each of a plurality of electric vehicles can be changed (paragraphs 0045 to 0046, FIG. 5). Therefore, according to this configuration, when charging the battery of one electric vehicle, it is possible to be in charge of one DC stabilized power supply, and when performing quick charging, multiple (two or more) DC stable It can also be in charge of joint power generation.

  Further, Patent Document 1 discloses that a DC-stabilized power supply that is not in use after being charged to a battery of an electric vehicle is switched at the time, and charging is continued at that time. By connecting to the battery of an electric vehicle, the number of DC stabilized power supplies in charge of charging is increased to reduce the time required for the ongoing charging, and the total of the batteries mounted on each of the plurality of electric vehicles is reduced. There is a description that the charging time can be shortened (paragraphs 0047 to 0050, FIG. 6).

  In the charging facility (charging device) described in Patent Document 1, each DC stabilized power source is not related at all to the charging status of the battery of another electric vehicle, and the charging of the electric vehicle battery to be charged is not related. Until the charging is completed, it is used exclusively for charging the battery of the electric vehicle. Therefore, when charging the battery of one electric vehicle as described above jointly with a plurality (two or more) of DC stabilized power supplies, the plurality (two or more) of the plurality of (two or more) from the start of charging to the completion of charging. The DC stabilized power supply will continue to take charge.

JP 2008-199752 A (7, 8, 10 pages)

  However, when performing constant current and constant voltage charging, which is a general battery charging method, charging is performed at a constant current in the initial stage, the battery voltage rises as charging progresses, and after reaching a certain voltage, the battery voltage May be charged while reducing the charging current so as to be constant. At this time, the charging current droops as the charging time elapses.

  Therefore, when multiple (two or more) DC stabilized power supplies are in charge of charging one electric vehicle, the charging current drooped as described above by each of the DC stabilized power supplies from the middle. Will be fed. However, if the current droops due to the above phenomenon, even a smaller number of DC stabilized power supplies than the above will be sufficient in terms of capability. Nevertheless, charging with a plurality of stabilized DC power supplies continues until charging of one electric vehicle is completed. In other words, in such a situation where the charging current droops, each DC-stabilized power supply does not fully perform its capacity, and waste is generated.

  Therefore, in the charging facility (charging device) described in Patent Document 1, when charging the batteries of a plurality of electric vehicles, the total charging time until the charging of the plurality of electric vehicles is completed is as described above. As described above, a time for continuously supplying power using a plurality of stabilized DC power supplies is included.

  From this, it can be said that the charging facility (charging device) described in Patent Document 1 still has room for further shortening the charging time for the batteries respectively mounted on the plurality of electric vehicles.

  Then, this invention makes it a subject to provide the charging equipment which can shorten the charge time to several batteries.

  The charging facility of the present invention is a charging facility capable of charging a battery mounted on a mobile body, and a plurality of power supply units that output charging power and a separate battery can be connected to each of the power supply units. A plurality of power supply lines, a connection line connecting the power supply lines to each other, a changeover switch provided on each of the power supply lines and the connection lines, for turning on / off the power supply of the lines, and an input of the changeover switch. A switch control unit that controls switching off, and of the changeover switches, a changeover switch provided on a power supply wiring is provided on the battery side with respect to the connection wiring, and the switch control unit When power is supplied to the battery from the plurality of power supply units, if the current value necessary for charging the battery reaches a predetermined value, In order to stop a part of the power supply path of the power supply path, the changeover switch related to the power supply stop is disconnected from among the changeover switches provided in the connection wiring, and the battery to be charged is supplied from the power supply unit that has stopped the power supply by the disconnection. In order to start power feeding to another battery, a switch for starting power feeding is turned on among the selector switches provided in the power feeding wiring.

  According to the above configuration, the switch control means disconnects the changeover switch related to the power supply stop among the changeover switches provided in the connection wiring in order to stop a part of the plurality of power supply paths to the battery to be charged. In order to start power feeding from the power supply unit that has stopped power supply due to this disconnection to a battery different from the battery to be charged, a changeover switch for power supply start is inserted among the changeover switches provided in the power supply wiring. The power supply to the battery to be charged can be continued with the power supply unit having a reduced number of units, and the power supply unit that has stopped supplying power can be directed to supply power to another battery. Therefore, it is possible to perform charging while fully demonstrating the capabilities of the plurality of power supply units.

  The “moving body” includes, for example, an electric vehicle. However, the present invention is not limited to this, and general means in which a battery is mounted and movable is applicable. The concept of the electric vehicle includes all vehicles (not limited to four-wheeled vehicles) in which an electric motor takes at least a part of driving force, and also includes so-called “hybrid vehicles”. Further, the battery to be charged is not necessarily limited to the use for driving the electric motor, but includes batteries for other purposes. The term “mounted” is not limited to the state of being actually mounted on a mobile body, but also includes a single battery that has not been mounted yet but has a mountable configuration.

  Moreover, naturally the connection of each electric power supply part by the said electric power feeding wiring and a battery also includes the aspect indirectly connected via a cable.

  In the charging facility according to the present invention, the plurality of power supply paths for the battery to be charged includes a main path that passes only the power supply wiring, and one or more sub-paths that pass through the power supply wiring and the connection wiring. Preferably, the control means disconnects a changeover switch on a connection line belonging to at least one of the sub-routes, and turns on a changeover switch on a power supply line belonging to a sub-route that has stopped power supply due to this disconnection.

  According to the preferable configuration, the power supply path can be switched by providing one changeover switch for each of the power supply wiring and the connection wiring, so that the configuration of the electric circuit can be simplified.

  The charging facility according to the present invention includes a current control unit that reduces an output of the power supply unit belonging to the power supply path that performs the power supply stop before the changeover switch is cut, thereby reducing a current passing through the power supply path. It is preferable to provide it.

  According to the preferable configuration, since the output of the power supply unit belonging to the power supply path for stopping the power supply is reduced before the changeover switch is cut off, the changeover switch can be cut off with a small passing current. Increases nature.

  And the said current control means shall increase the output of the electric power supply part which belongs to the electric power feeding path which does not perform the said electric power feeding stop while decreasing the output of the electric power supply part which belongs to the electric power feeding path which performs the said electric power feeding stop. preferable.

  According to the preferable configuration, since the outputs of the respective power supply units can be adjusted simultaneously, the power supply units can be switched efficiently.

  According to the present invention, it is possible to perform charging without losing the ability of each of the plurality of power supply units, and therefore it is possible to shorten the charging time for a plurality of batteries.

It is one Embodiment of this invention, Comprising: The main main-body part and the operation part are integrated, (A) is a front view, (B) is a right view. It is other embodiment of this invention, Comprising: The operation part is shown among the main body parts and the operation part which were made into a different body, (A) is a front view, (B) is a right view. (A) (B) is the schematic which shows the progress of charge of the charging equipment which concerns on further another embodiment of this invention. (A) (B) is the schematic which shows the progress of the charge following the state shown in FIG. 3 of the charging equipment. 5A to 5C are schematic views showing the progress of charging following the state shown in FIG. 4 of the charging facility. (A) is the schematic which showed the progress of the charge for every electric vehicle of the charging equipment which concerns on embodiment shown to FIGS. 3-5 in time passage, (B) is about the charging equipment of (A). It is the schematic which showed the progress of the charge for every electric vehicle at the time passage when charging was performed by changing the charging mode.

  Embodiments of the present invention will be described below with reference to the drawings.

  In addition, the meaning of the phrase “electrically connected” used in the following description is not limited to the case where the cable 2 is directly connected to the battery. This includes cases where they are connected via internal electrical wiring.

  The charging equipment of each of the following embodiments is used as a quick charging equipment that can charge a driving battery mounted on an electric vehicle in a short time. The charging facility can be charged at a charging speed corresponding to the selected charging mode when the user selects the charging mode. That is, not only rapid charging (for example, output is about 44 to 50 kW) but also medium speed charging (for example, output is about 10 to 30 kW) can be performed. As shown in FIG. 1, the charging facility includes a main body 1 for charging, and a cable 2 extending from the main body 1 and capable of electrically connecting the main body 1 and the battery. The main body 1 includes a main main body 11 that adjusts electric power so as to be suitable for charging the battery, and an operation unit 12 for operating the main main body 11. As shown in FIG. 1, the main body 11 and the operation unit 12 may be integrated by being physically coupled (in addition, the main body 11 and the operation unit 12 may be integrated completely, for example, both may be provided in one casing). May be physically separated and separated as shown in FIG. In FIG. 2, only the operation unit 12 is illustrated.

  The main body 11 is also referred to as a “power supply panel”, and includes a power supply unit 31 and a management electronic circuit (other than the power supply unit 31 is not shown). The power supply unit 31 (see FIGS. 3 to 5) converts externally taken power (for example, commercial AC power) into DC power suitable for charging a battery mounted on the electric vehicle, and supplies the battery via the cable 2. A portion for transmitting power, and includes, for example, a rectifier, a transformer, an inverter, and the like. The main body 11 is provided with a plurality of power supply units 31 so that a plurality of batteries can be charged simultaneously. 3 to 5 show two power supply units 31 with an output of 25 kW. With respect to one battery, the power supply unit 31 can perform medium-speed charging with a maximum output of 25 kW by supplying power from one unit, and can rapidly charge with a maximum output of 50 kW by supplying power from two units.

  The management electronic circuit is a part that performs signal processing and the like to cooperate with the power supply unit 31 and the operation unit 12. Specifically, it processes information such as the battery storage amount transmitted from the electric vehicle and issues an instruction to send electric power corresponding to the information, or a power supply unit by charging start and stop instructions from the operation unit 12 31 is operated, or an instruction to display the charging status is given to the display 121a1 of the operation unit 12.

  In addition to the above, the main body 11 can be provided with means having various functions as required, such as a lightning protection circuit.

  The operation unit 12 is formed to have a size that is at least smaller in the vertical direction than the main body 11, and is provided integrally (see FIG. 1) or separately (see FIG. 2) in the main body 11. This is a part for performing the charging operation. The separate type operation unit 12 shown in FIG. 2 is also referred to as a “charging stand” (different from the “charging stand” in the “background art” column). The operation unit 12 includes an operation unit main body 121 for operating the main main body unit 11 by a user of the charging facility, and a cable support unit 122 provided in the operation unit main body 121. When the operation unit 12 is separated as in the embodiment shown in FIG. 2, a stand 123 for installing the operation unit main body 121 on the installation surface G is used.

  The operation unit 12 includes an operation panel 121a including a display 121a1, a charge start button 121a2, a charge stop button 121a3, and an emergency stop button 121a4, and a connector storage unit 121b. The operation panel 121a is provided on the front side of the operation unit main body 121, and the connector storage part 121b is provided on the same side. The emergency stop button 121a4 is for emergency stop of the charging facility in the event of a fire, and the emergency stop button 11a is also provided on the front side of the main body 11.

  In the embodiments shown in the drawings, a display 121a1, a charge start button 121a2, and a charge stop button 121a3 are provided separately. The display 121a1 is a touch panel. Therefore, the charging operation can be performed by the user touching the display 121a1 without providing the charging start button 121a2 and the charging stop button 121a3.

  In the embodiments shown in the drawings, the connector storage portion 121b is provided in the operation portion main body 121. However, the present invention is not limited to this. For example, the connector storage portion 121b is provided in the stand 123 of the “charging stand” in the embodiment shown in FIG. It may be.

  Since the main body unit 1 includes the main main body unit 11 and the operation unit 12, only the means having a minimum function necessary for an operation of charging the battery by the user who performs the charging operation is provided on the operation unit 12. Since the other means only has to be provided in the main body part 11, the operation part 12 can be made compact, and the conventional main body part and the operation part are completely integrated. Compared to equipment, it is advantageous because of its high degree of freedom in arrangement.

  Since the installation location of the charging facility is basically outdoors, the operation unit 12 has a waterproof structure. The outer shape of the operation unit 12 is a substantially square shape with the rear side chamfered in a plan view, and a trapezoidal shape with a narrow front side in a side view. Therefore, the upper surface 121c of the operation unit 12 is a slope that goes down to the front side. Therefore, for example, rainwater or the like does not collect on the upper surface 121c. The shape of the operation unit 12 is not limited to that shown in the drawings, and can be implemented in various shapes such as a cylindrical shape or a triangular roof shape on the upper surface 121c.

  The operation unit 12 can be integrated with the main body unit 11 by being physically coupled by various means such as bolting. For example, as in the embodiment shown in FIG. 1, the side surface of the main body portion 11 and the side surface of the operation portion 12 can be in contact with each other, or the side surface of the main body portion 11 and the back surface of the operation portion 12 can be in contact with each other. However, the present invention is not limited to this, and by providing means for physically coupling the main body 11 and the operation unit 12, it can be integrated in various ways. It should be noted that when uniting in this way, the operation unit 12 can be operated at a position where a user can reach, more specifically, a position where both a standing user and a user in a wheelchair can reach. It is desirable to form the space S <b> 1 below the operation unit main body 121 by providing the panel 121 a and providing the operation unit main body 121 at a predetermined distance from the installation surface G of the operation unit 12.

  Note that the “installation surface G of the operation unit 12” is a surface on which the main body 11 is installed in the case where the main body 11 and the operation unit 12 are integrated as in the embodiment shown in FIG. In the case where the operation unit 12 is separated from the main body unit 11 as in the embodiment shown in FIG. 2, the surface on which the operation unit 12 itself is installed is indicated. Point to.

  When the operation unit 12 is provided separately from the main body unit 11, the stand 123 is provided so as to protrude from the lower surface 121d of the operation unit 12, as shown in FIG. The stand 123 is formed of a pipe material, and the lower end portion is enlarged to be an installation portion 123a. The operation portion 12 is installed by embedding the installation portion 123a in the installation surface G or using an anchor bolt. It can be fixed to the surface G. In addition, when the operation part 12 is made into a different body, of course, it is necessary to electrically connect the main body part 11 and the operation part 12 using a power supply cable and a communication cable. Further, as in the case of the integrated case described above, the operation panel 121a of the operation unit 12 is located at a position where the user's hand can reach, more specifically, a position where both a standing user and a wheelchair user can reach. In addition, it is desirable to form the space S <b> 1 below the operation unit main body 121 by providing the operation unit main body 121 at a predetermined distance from the installation surface G of the operation unit 12.

  A plurality of operation units 12 can be electrically connected to one main body unit 11. Therefore, it can be connected to a plurality of batteries at the same time. Since the main body 11 is provided with a plurality of power supply units 31 as described above, a plurality of batteries can be charged simultaneously. That is, when the cables 2... 2 are connected to the batteries of two or more electric vehicles, charging of the batteries mounted on the number of electric vehicles according to the capacity of the power supply unit 31 is started first. When there is a margin in the capacity of the power supply unit 31 according to the progress of the battery, charging of the batteries mounted on other electric vehicles starts in parallel (overlapping). Specific explanation regarding this simultaneous charging will be described later.

  In addition, since charging is sequentially performed according to the capability of the power supply unit 31 as described above, a charge reservation is made for the battery of the electric vehicle that is waiting for charging, and the power supply unit 31 is configured as described above. When there is a margin in capacity, charging is started sequentially in the order in which the charge reservations are made. Therefore, the user does not need to wait for the completion of charging of the battery of another electric vehicle on the spot, and connects the cable 2 to the charging terminal provided in his / her electric vehicle, makes a charge reservation, and then charges. The waiting time can be effectively utilized by shopping, for example, until the end. In addition, since the single main body 11 can support a plurality of electric vehicles, the cost of the entire charging facility system can be reduced.

  As described above, the electrical connection of the plurality of operation units 12 to 12 with respect to one main body unit 11 is not limited to the case where the operation unit 12 is provided separately from the main body unit 11, and is integrated. But it is possible. In the embodiment shown in FIG. 1, a maximum of four operation units 12 can be integrally attached to one main body 11.

  Here, when the operation unit 12 is provided separately from the main body unit 11, for example, when installing this charging facility in a parking lot, only the operation unit 12 is installed in the parking space, The main body 11 can be installed in a place where it does not become necessary. Therefore, the space can be used effectively, and the charging facility can be installed without problems even in a narrow parking lot where there is no space. Moreover, since commercial power before voltage transformation (step-down) is introduced into the main body 11, it is dangerous. Therefore, installing the main body 11 away from the user can provide a safe environment for the user.

  Whether the operation unit 12 is provided integrally with the main body unit 11 or a separate unit, the space S1 is at least below the operation unit body 121 in the body unit 1. Exists. Since the space S1 exists in this manner, even if the user is a person on a wheelchair, for example, the user can work close to the operation unit and the workability of the user is improved. Therefore, this charging facility can meet the recent demand for universal design.

  The cable 2 protrudes from the main body 1 (more specifically, the operation unit main body 121 of the operation unit 12). As the cable 2, a captyre cable in which a plurality of core wires (electric wires) are collectively covered is used.

  A connector 21 having a well-known structure is provided at the tip of the cable 2 for electrical connection to a battery by connecting to a charging terminal provided in the electric vehicle. The connector 21 is provided with a lock lever 21a as a lock means. The lock lever 21a is used to lock (fix) the connector 21 in an electrically connected state after the connector 21 is inserted into a charging terminal provided in the electric vehicle.

  The cable 2 is provided with a communication cable as well as a power cable for sending power for charging the battery from the main body 11. The communication cable transmits information transmitted from an electric vehicle, such as the amount of stored battery power and the occurrence of charging abnormality, to the main body 1 side. By processing the information in the main body part 1 (main main body part 11), power is supplied from the main body part 1 (main main body part 11) to the battery of the electric vehicle with the power corresponding to the information, or charging is performed. You can stop.

  The main body 1 is provided with a cable support 122 that supports the cable 2. In the embodiments shown in the drawings, the cable support portion 122 is provided integrally with the operation portion main body 121, and a part of the cable 2 is disposed therein.

  The cable support portion 122 extends from the main body portion 1 and suspends the cable 2 with a first support portion 122a whose distal end is located above the proximal end, and is proximal to the distal end of the first support portion 122a. And a second support part 122b whose distal end is located outward with respect to the proximal end.

  The second support portion 122b is formed to extend in a radial direction (horizontal direction away from the first support portion 122a) centered on the extending direction of the first support portion 122a and obliquely upward. In the embodiment shown in each figure, a base portion 122b1 formed so as to extend linearly obliquely upward and an arch portion 122b2 formed in a semicircular shape above this base portion 122b1 are combined, These are fixed to the first support part 122a. With this configuration, the second support portion 122b can support the cable 2 while maintaining strength. The curvature of the arch portion 122b2 is determined in consideration of the rigidity of the cable 2 or the core wire of the cable 2 so as not to be subjected to excessive stress. The second support portion 122b is fixed to the first support portion 122a in a positional relationship that is most suitable for the installation location of the charging facility. More specifically, the angle of the circumferential direction of the 2nd support part 122b with respect to the 1st support part 122a is set and fixed.

  The cable 2 is disposed inside the arch portion 122b2. Since the cable 2 has a semicircular shape in the second support portion 122b, the cable 2 is not easily stressed by bending, and the possibility that the core wire (electric wire) constituting the cable 2 is disconnected can be reduced. The base portion 122b1 is a portion that receives the weight of the cable disposed in the arch portion 122b2, and an illumination portion 122b11 that is lit at night or the like is provided on the lower surface.

  The cable support portion 122 is fixed to the operation portion main body 121. However, the configuration is not limited thereto, and the cable support portion 122 may be configured to be rotatable with respect to the operation portion main body 121, or the first support portion 122a. However, the second support portion 122b may be configured to be rotatable. Moreover, it is good also as a structure which can expand-contract the 1st support part 122a or the 2nd support part 122b.

  Next, the progress of charging will be described with reference to FIGS. In the embodiment of FIGS. 3 to 5, two elements for charging are provided. That is, two power supply units 31 and 31 are provided in one main body unit 11, and two operation units 12 and 12 are provided correspondingly. In order to facilitate understanding, in the following description and FIGS. 3 to 5, “(1)” is added to the end of a reference symbol attached to an element belonging to one system, and a reference symbol attached to an element belonging to the other system. “(2)” is added to the end of “.

  The main body 11 in the charging facility of this embodiment includes a plurality of power supply units 31 (1), 31 for supplying power to the batteries mounted on the two electric vehicles EV (1), EV (2), respectively. (2) and a plurality of power supply wirings 32 (1) and 32 (2) that can connect the power supply units and the batteries are provided. In other words, the plurality of power supply wirings 32 (1) and 32 (2) can connect the power supply units 31 on a one-to-one basis with the same number of batteries as the number of power supply units 31.

  Then, the power supply wirings 32 (1) and 32 (2) are connected to each other, and one electric vehicle EV (1) or EV (2) is connected from the two power supply units 31 (1) and 31 (2). ) Is provided with a connection wiring 33 that enables power supply to the battery. As shown in the figure, one connection wiring 33 of this embodiment is provided between two power supply wirings 32 (1) and 32 (2). However, when three or more power supply wirings 32 are provided. A plurality of connecting wires 33... 33 are provided so as to connect the power supply wires 32.

  By providing the connection wiring 33 in this way, the power supply path from each power supply unit to the battery is an example of the power supply state (power supply to the battery of the electric vehicle EV (1)) shown in FIG. In this case, from the main route E1 passing only the power supply wiring 32 (1), and the sub route E2 passing through each of the power supply wiring 32 (2), the connection wiring 33, and the power supply wiring 32 (1) of one system. Composed. In the case where power is supplied from three or more power supply units 31 to 31 to the battery of one electric vehicle, there are a plurality of sub-routes.

  Further, change-over switches 34a (1), 34a (2), 34b that are provided in each of the power supply wirings 32 (1), 32 (2) and the connection wiring 33 and turn on / off the power of the respective wirings, Switch control means 35 is provided for controlling on / off of the changeover switch. The changeover switches 34 a (1) and 34 a (2) on the power supply wirings 32 (1) and 32 (2) are provided closer to the battery than the connection point between the power supply wirings 32 (1) and 32 (2) and the connection wiring 33. It has been. Therefore, in the power supply state shown in FIG. 3A, the energization of the main path E1 is turned on / off by the changeover switch 34a (1), and the energization of the sub path E2 is made by the two changeover switches 34a (1), 34b. Turned on / off.

  The switch control unit 35 proceeds with charging when power is supplied from the two power supply units 31 (1) and 31 (2) to the battery of one electric vehicle EV (1) or EV (2). Accordingly, the charging current droops and is detected by the current detecting means 36 (1), 36 (2), and the electric vehicle EV (1), It is determined that the current value to the battery of EV (2) has decreased to a predetermined value, and thereafter, the changeover switch 34b of the connection wiring 33 is disconnected, and the power supply units 31 (1), 31 (2) Of these, the power supply is switched to one. However, in this embodiment, the current control unit 37 operates as follows before the switch control unit 35 disconnects the changeover switch 34b.

  In this embodiment, the switch control unit 35 is described as determining the current value and the switching switch on / off state. However, a determination unit independent of the switch control unit 35 may be provided. Good (the same applies to the current control means 37 described below).

  The current detection means 36 (1) and 36 (2) are provided in the middle of the respective power supply wirings 32 (1) and 32 (2). The “predetermined value” is a current value (after drooping) required for charging a battery mounted on one electric vehicle EV (1) or EV (2), and decreased 1 The current when the power supply unit 31 (1) or 31 (2) of the unit can supply power to the battery mounted on the electric vehicle EV (1) or EV (2) within the range of the output it has Value.

  In a more general manner, the “predetermined value” is a current value necessary for charging the battery to be charged, and the reduced number of power supply units 31 supplies the number of power supplies. This is the current value at the time when power can be supplied to the one battery within the range of the total output of the unit 31. However, this is only a guideline for switching the power supply, and the power supply is switched even when the current value necessary for charging exceeds the total output range of the reduced number of power supply units 31. Is possible. However, in this case, the charging time by the reduced number of power supply units 31 is longer than when switching within the range of the total output. Therefore, it is desirable to perform switching near the “predetermined value”.

  In this embodiment, the output from the power supply unit 31 (2) belonging to the power supply path that stops power supply before disconnecting the changeover switch 34b of the connection wiring 33 (targeted to decrease the number of units) is reduced (an example). Current control means 37 is provided to reduce the current passing through the change-over switch.

  The current control unit 37 operates before the switch control unit 35 operates. Specifically, as the charging progresses, the charging current droops and is detected by each of the electric power supply units 31 (1) and 31 (2) during the charging detected by the current detecting means 36 (1) and 36 (2). After the current value to the batteries of the automobiles EV (1) and EV (2) has decreased to a predetermined value, the current control means 37 before the switch control means 35 disconnects the changeover switch 34b of the connection wiring 33. Decreases the output of the power supply unit 31 (2). Thereby, since the changeover switch 34b can be disconnected in a state where the passing current is small, safety at the time of disconnection is high.

  Note that the current control unit 37 reduces the output of the power supply unit 31 (2) belonging to the sub route E2, which is the power supply route for stopping power supply as described above (to be reduced in number of units), and FIG. As shown in (A), the output of the power supply unit 31 (1) belonging to the main path E1 (not subject to the decrease in the number of units) that is a power supply path that does not stop power supply is increased (as an example, the PWM duty is increased). ) Is desirable.

  Hereinafter, the charging procedure in this embodiment will be described in the order shown. In addition, the thickness of the broken line in the figure corresponds to the magnitude of the current value.

  FIG. 3A shows that the charging terminal provided in the first electric vehicle EV (1) is connected to the operation unit 12 (1) via the cable 2 (1), and the cable 2 is connected to the operation unit 12 (2). The charging terminals provided in the second electric vehicle EV (2) are connected via (2), respectively, and the power supply to the battery of the first electric vehicle EV (1) is started. . At this time, power is not supplied to the battery of the second electric vehicle EV (2), and a charge reservation is made.

  First, two power supply units 31 (1) and 31 (2) are in charge of charging the battery of the first electric vehicle EV (1) through the two power supply paths illustrated by the broken lines with thick arrows. (Quick charge). Therefore, the changeover switches 34a (1) and 34b are turned on. On the other hand, the changeover switch 34a (2) is disconnected. The power supply path includes the main path E1 passing only the power supply wiring 32 (1) by power supply from the power supply unit 31 (1) of one system and the power supply of the other system by power supply from the power supply unit 31 (2) of the other system. The wiring 32 (2), the connection wiring 33, and the sub route E2 passing through each of the one-system power supply wiring 32 (1).

  When time elapses from the start of charging, the charging current droops as shown by a thin broken line with an arrow in FIG. When the charging current droops in this way, what required two power supply units 31 (1) and 31 (2) for charging (rapid charging) belongs to the main path E1. On the other hand, only the power supply unit 31 (1) of the system is sufficient. Therefore, as described below, the power supply from the power supply unit 31 (2) of the other system to the sub route E2 is stopped, and only the power supply from the power supply unit 31 (1) of the one system to the main route E1 is performed. The battery of the electric vehicle EV (1) is charged, and the number of power supply units 31 used for charging is reduced.

  Details will be described below. The current control means 37 determines that the current detected by the current detection means 36 (1), 36 (2) has dropped to a predetermined value before stopping the power supply to the sub-path E2. By this determination, the current control means 37 decreases the output of the power supply unit 31 (2) that is scheduled to stop feeding (see FIG. 4A), and the changeover switch 34b (on the connection wiring 33) to be disconnected. Reduce the current through. By doing so, safety when the changeover switch 34b is disconnected as described below is enhanced.

  In addition to the above, according to the determination (determination by the current control unit 37 that the current detected by the current detection units 36 (1) and 36 (2) has decreased to a predetermined value), the current control unit 37 The output of the power supply unit 31 (1) scheduled to continue power supply is increased (see FIG. 4A). This is because the sum of the charging currents of the main route E1 and the sub route E2 shown in FIG. 3B is secured only by the main route E1 even after the power supply to the sub route E2 is stopped as shown in FIG. 4B. It is made for the purpose of making it possible. In this way, the amount of power supplied to the battery of the first electric vehicle EV (1) by the main route E1 before and after the changeover switch 34b is disconnected can be prevented, so that the two power supply units 31 ( Compared with the case where power is continuously supplied in 1) and 31 (2), the charging time does not increase and the number of power supply units can be reduced efficiently. And the capability of the electric power supply part 31 (1) scheduled to continue feeding can be used effectively.

  As described above, when the switch control unit 35 determines that the output of the power supply unit 31 (2) is decreased and the output of the power supply unit 31 (1) is increased, FIG. As illustrated, the switch control unit 35 cuts the changeover switch 34b (on the connection wiring 33) related to the power supply stop, and the power supply to the sub-path E2 is stopped.

  Then, after the switch control means 35 determines that the changeover switch 34b has been disconnected, as shown in FIG. 5A, the switch control means 35 changes the changeover switch 34a (2) (the power supply of the other system). The wiring 32 (2)) is turned on, and feeding of a new feeding path (new main path E3) is started. At this time, power supply to the battery of the second electric vehicle EV (2) is started from the power supply unit 31 (2) of the other system (medium speed charging). At this time, power supply from the power supply unit 31 (1) of one system to the battery of the first electric vehicle EV (1) is also continuing. That is, the batteries of the two electric vehicles EV (1) and EV (2) are simultaneously charged.

  Here, in the charging facility (charging device) described in Patent Document 1, switching of the DC stabilized power source (corresponding to the power supply unit of the present application) has not been made until charging is completed. There was a useless situation where the DC stabilized power supply was not fully capable.

  On the other hand, in the embodiment shown in FIGS. 3 to 5, the switch control means 35 switches the changeover switch 34b when the charging of the battery of the first electric vehicle EV (1) is not yet completed. The number of power supply units 31 used for charging the battery of the first electric vehicle EV (1) is changed from two (31 (1) and 31 (2)) to one (31 (1)). ing. By doing so, the power supply unit 31 (2) on the other side is turned to charge the battery of the second electric vehicle EV (2), and the two electric vehicles EV (1) and EV (2) Each battery can be charged simultaneously, and the capabilities of the power supply units 31 (1) and 31 (2) can be used effectively. And since it is less likely to generate a useless situation in which the ability is not sufficiently exhibited as in Patent Document 1, as a result, the total for each battery of the two electric vehicles EV (1) and EV (2) Charging time can be shortened.

  Next, when the switch control unit 35 determines that charging of the battery of the first electric vehicle EV (1) is completed based on the current value detected by the current detection unit 36 (1), FIG. As shown in FIG. 4, the switch control unit 35 disconnects the changeover switch 34a (1) (on the power supply wiring 32 (1) of one system), and the power supply of the main path E1 is stopped. In this embodiment, charging is completed at a charging rate of 80%, and the current detection means 36 (1) detects a current value corresponding to the charging rate of 80%.

  Then, after the switch control means 35 determines that the changeover switch 34a (1) has been disconnected, the switch control means 35 turns on the changeover switch 34b (on the connection wiring 33), and a new power supply path (new subpath) The power supply of E4) is started. From this point onward, as shown by the thick broken lines with arrows in FIG. 5C, two power supply units 31 (1), 31 (2) are provided for the battery of the second electric vehicle EV (2). Is charged by charging (rapid charging).

  Through the series of flows, the batteries of the two electric vehicles EV (1) and EV (2) are charged. As described above, in the embodiment shown in FIGS. 3 to 5, the two electric vehicles EV (1), EV ( 2) The batteries of the second electric vehicle EV (2) can be fully charged after starting the charging of the battery of the first electric vehicle EV (1). Total charge time can be shortened.

  FIG. 6A shows the progress of charging for each of the electric vehicles EV (1) and EV (2) in the embodiment shown in FIGS. In the illustrated section A1-1, the battery of the first electric vehicle EV (1) is rapidly charged with a maximum output of 50 kW (corresponding to FIGS. 3A to 4A). And in section A2-1 corresponding to this, the battery of the 2nd electric vehicle EV (2) is reserved for charge.

  In section A1-2 in FIG. 6A, the battery of the first electric vehicle EV (1) is charged at medium speed with a maximum output of 25 kW, and charging is completed (FIGS. 4B to 5B). Corresponding). In the section A2-2 corresponding to this, the battery of the second electric vehicle EV (2) is also charged at a medium speed with a maximum output of 25 kW (corresponding to FIGS. 5A to 5B).

  In section A2-3 in FIG. 6A, the battery of the second electric vehicle EV (2) is rapidly charged at a maximum output of 50 kW, and charging is completed (corresponding to FIG. 5C).

  As can be clearly understood from FIG. 6A, in this embodiment, simultaneous charging is performed by effectively using the capabilities of the power supply units 31 (1) and 31 (2). Therefore, the battery charging time for two electric vehicles can be shortened.

  FIG. 6B shows the progress of charging for each of the electric vehicles EV (1) and EV (2) over time when charging is performed by changing the charging mode.

  The sections B1-1, B1-2, and B2-1 in FIG. 6B are the same as the sections A1-1, A1-2, and A2-1 illustrated in FIG. In the embodiment of FIG. 6B, even if the battery of the first electric vehicle EV (1) is completely charged in the middle of the section B2-2, the maximum battery of the second electric vehicle EV (2) is reached. The medium-speed charging at the output of 25 kW continues as it is, and reaches the section B2-3 as it is to complete the charging. As described above, when the user of the second electric vehicle EV (2) has time, or when the user wants to reduce the battery load due to the rapid charging, the user sets the charging mode to “medium speed”. When is selected, quick charging is not performed, and such charging is performed. Even in this way of charging, one of the power supply units 31 is directed to charge the battery of the second electric vehicle EV (2) when the section B1-1 is shifted to B1-2. Therefore, since the batteries of the two electric vehicles EV (1) and EV (2) can be charged simultaneously in the section B1-2 and the section B2-2, the total charging time is shortened compared with the case where the simultaneous charging is not performed. it can.

  In the embodiment of FIGS. 3 to 5, power is supplied from the two power supply units 31 (1) and 31 (2) to the battery of one electric vehicle EV (1) at the start of charging. In order to reduce the number of power supply units 31 that perform power supply to one unit (power supply unit 31 (1)), one changeover switch 34b is disconnected. If power is supplied to the battery of one electric vehicle from three or more power supply units 31... 31, the power supply unit 31 that is not subject to decrease in number (continues power supply) and the electricity to be charged. The changeover switches 34b... 34b on the plurality of connecting wires 33... 33 that are directly energized with respect to the power supply wiring 32 that connects to the automobile battery are disconnected. In this case, each change-over switch 34b... 34b may be cut off sequentially so that the number of power supply units 31 used for charging is sequentially decreased from 3 to 2 to 1 or the power supply unit The plurality of change-over switches 34b... 34b may be disconnected simultaneously so that the number of 31 is reduced from 3 to 1 at a stretch.

  Finally, the operation method of this charging facility will be briefly described. First, a user removes the connector 21 of the cable 2 from the connector storage part 121b of the operation part main body 121, and inserts the connector 21 into the charging terminal provided in the electric vehicle. And the lock lever 21a provided in the connector 21 is pulled, and the state is fixed so that the connector 21 can be energized. When this fixing is performed, it becomes possible to energize for charging. In the embodiment of FIGS. 3 to 5, as described above, the cable 2 can be connected to each charging terminal of two electric vehicles (EV (1), EV (2)) at the same time.

  Then, the user presses the charge start button 121a2 on the operation panel 121a to start charging. When the charging mode (rapid or medium speed) can be selected, the user touches the display 121a1, which is a touch panel, to select the charging mode and then start charging. The state of charging is displayed on the display 121a1. Charging is automatically terminated when a predetermined charging state is reached, but can be forcibly terminated by the user pressing the charging stop button 121a3. In the embodiment of FIGS. 3 to 5, as described above, charging of the battery of one electric vehicle EV (1) is started (see FIGS. 3A to 5A), and the other halfway is performed. Charging of the battery of the electric vehicle EV (2) is started (see FIGS. 5A to 5C).

  When charging is completed, the connector 21 is removed from the charging terminal of the electric vehicle and returned to the connector storage part 121b of the operation part main body 121.

  In the embodiment of FIGS. 3 to 5, the capacity of each of the power supply units 31 (1) and 31 (2) is maximized, and the battery of one electric vehicle EV (1) and the other electric vehicle EV (2 ), It is possible to further reduce the charging time for each battery of a plurality of electric vehicles as compared with the related art (for example, related to Patent Document 1). Therefore, a user's charging waiting time can be shortened and it can contribute to the spread of charging equipment. Further, since the quick charger is expensive, it can be used without playing a small number of quick chargers, which is economically advantageous.

DESCRIPTION OF SYMBOLS 1 Main body part 11 Main body part 12 Operation part 121 Operation part main body 121a1 Display 122 Cable support part 2 Cable 21 Connector 31 Power supply part 32 Power supply wiring 33 Connection wiring 34a Changeover switch (power supply wiring)
34b Changeover switch (connection wiring)
35 Switch control means 37 Current control means E1 Power supply path (main path)
E2 Power supply route (sub route)
G Installation surface

Claims (4)

In a charging facility that can charge a battery mounted on a moving body,
A plurality of power supply units that output power for charging;
A plurality of power supply wirings capable of connecting separate batteries to each of the power supply units;
A connecting line for connecting the power supply lines to each other;
A change-over switch that is provided in each of the power supply wiring and the connection wiring, and that turns on and off the energization of each wiring,
Switch control means for controlling on / off of the changeover switch,
Among the changeover switches, the changeover switch provided on the power supply wiring is provided on the battery side with respect to the connection wiring,
The switch control means supplies power to the battery to be charged when a current value necessary for charging the battery reaches a predetermined value when power is supplied from the plurality of power supply units to the battery to be charged. In order to stop a part of the plurality of power supply paths, the changeover switch related to the power supply stop is disconnected from among the changeover switches provided in the connection wiring, and the power supply unit that has stopped the power supply by the disconnection is connected to the charging target. A charging facility characterized in that, in order to start power supply to a battery different from the battery, a changeover switch for starting power supply is turned on among changeover switches provided in the power supply wiring. A plurality of power supply paths for the battery to be charged is composed of a main path that passes only the power supply wiring, and one or more sub-paths that pass through the power supply wiring and the connection wiring,
The switch control means disconnects a changeover switch on a connection wiring belonging to at least one of the sub-routes, and turns on a changeover switch on a power supply wiring belonging to a sub-route for which power supply is stopped by this disconnection. The charging equipment according to claim 1.   The current control means for reducing the current passing through the power supply path by reducing the output of the power supply unit belonging to the power supply path for stopping the power supply before the changeover switch is cut off. The charging facility according to 1 or 2.   The current control means decreases the output of a power supply unit belonging to a power supply path that performs the power supply stop and increases the output of a power supply unit that belongs to a power supply path that does not perform the power supply stop. 3. The charging facility according to 3.