JPS5826536A - Charger for electric vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to an electric vehicle charging device, and in particular, when charging multiple storage batteries installed in multiple electric vehicles at the same time, priorities are determined and storage batteries with a high priority are selected. The present invention relates to a charging device for an electric vehicle that quickly charges a storage battery with the next highest priority based on the charging status.

In general, electric vehicles have the disadvantage that although charging time is long, their mileage is short. Since it is possible to use a quick charger to speed up the charging time, slow chargers, which require about 7 to 10 hours to charge, are often used as chargers.

By the way, one charger is usually prepared for one electric vehicle. Therefore, for example, in a place where there are three electric vehicles, three chargers are prepared. Such a charger is placed in a garage and charges the storage battery when an electric vehicle is in the garage. Therefore, in a vehicle where an electric vehicle is running, each charger is idle. If these chargers are effectively used to enable rapid charging, it will be possible to charge efficiently without using an expensive rapid charger.

In addition, the daily mileage of each electric vehicle is increasing, and the remaining charge capacity of each electric vehicle's storage battery is also increasing. Therefore, if it is possible to prioritize and quickly charge the storage batteries of electric vehicles that have relatively long distances,
The charger can be used more effectively and the storage battery can be charged more efficiently.

Therefore, the main object of the present invention is to prioritize the connection means to be connected to each of a plurality of electric vehicles, and to sequentially connect the plurality of parallel-connected storage batteries starting with the connection means connected to the connection means with the highest priority. An object of the present invention is to provide a charging device for an electric vehicle that can be rapidly charged using a charger.

An advantageous object of this invention is to be able to select the 6th priority among a plurality of connection means, and to quickly charge a battery by connecting a plurality of chargers in parallel in order from the storage battery to which the connection means with the highest priority is connected. The purpose of the present invention is to provide a charging device for an electric vehicle.

To summarize this invention, the output terminals of a plurality of chargers can be switched arbitrarily to connect them in parallel, and the number of chargers connected to a connection means with a high priority determined in advance is relatively increased. This connection means is connected to a storage battery to charge it, and the number of chargers connected in parallel is reduced based on the state of charge of this storage battery. This structure is designed to increase the number of chargers that can be used. Also, the second
In the invention 5-, the priority order of the connection means can be arbitrarily set.

The above objects and other objects and features of the present invention will become more apparent from the detailed description given below with reference to the drawings.

FIG. 1 is a schematic block diagram of an embodiment of the present invention.

In the configuration, the CPU 1 constitutes a switching control means. In connection with this CPU, there is a read-only memory (ROM) 2 that stores in advance a program based on the flowcharts shown in FIGS. 6 to 10 described below, and a random access memory for storing data shown in FIG. 2 described later. A memory (RAM) 3 is provided. Further, the interface 7 is connected to the cpui via l104. A display 5 and a quick charge instruction switch 6 are connected to this interface 7. This quick charge instruction switch 6 is connected to the A storage battery 1 which will be described later.
This is to give an instruction to preferentially rapidly charge any one of the storage batteries 61 to C 181. A changeover switch 12 is connected to the interface 7, and various information signals from, for example, 6-3 electric vehicles 16 to 18 are applied via connectors 19 to 21.

For example, three chargers 9 to 1 are connected to the changeover switch 12.
A charging output is given from 1. The A charger 9 to the C charger 11 each output a pulsating voltage having a different phase based on each phase U, V, and W of the three-phase AC current 118, for example.

Normally, a storage battery is charged using a pulsating current voltage, and charging is performed only during a period when the pulsating current voltage exceeds the storage battery voltage. Therefore,
When charging is performed by overlapping pulsating currents with different phases, the period during which the pulsating current voltage exceeds the storage battery voltage increases, and the charging time can be shortened. For this reason, also in this embodiment, each of the chargers 9 to 11 outputs a pulsating voltage.

The changeover switch 12 switches the output terminals of the A chargers 9 to C chargers 11 to connect them in parallel, and connects any of the switched chargers 9 to 11 to the plugs 13 to 11.
15 to any of the electric vehicles 16, 17, and 18. Note that this changeover switch 12 will be explained in detail with reference to FIG. 3, which will be described later.

are doing. Further, this electric vehicle 16 includes a plug 13.
Plug insertion detector (P) 1 that detects that the plug is inserted
62, a liquid level detector 163 for detecting the liquid level of the storage battery 161, a temperature detector 164 for detecting overtemperature of the storage battery 161, and a voltage detector 165 for detecting the terminal voltage of the storage side 161. provided. These detectors 162
The detection signal detected at connector 19. It is given to the CPU 1 via the interface 7, l104. Similarly, in the B electric vehicle 17, the B storage battery 1
71 is mounted, and a plug insertion detector 172, a liquid level detector 173, a temperature detector 174, and a voltage detector 175 are also provided.

The detection signals detected by each of the detectors 172 to 175 are then given to the Inter 7 Eighth 7 via the connector 20. The C electric vehicle 18 is also equipped with a C storage battery 181, and is also provided with a plug insertion detector 182, a liquid level detector 183, a temperature detector 184, and a voltage detector 11185. The detection signals of each detection 11182 to 185 are then given to the interface 7 via the connector 21.

FIG. 2 is an illustrative diagram showing data stored in the RAM 3 shown in FIG. 1. In the figure, RAM3 is a storage area 31
~39 included. The storage area 31 stores electric vehicles 16, 17 .
When the plug insertion detectors 162, 172, and 182 detect that the plug 13.14.15 is inserted into the plug 18, the flags pa, pb, and pc are respectively stored. The storage area 32 stores seven lags Qa, Qb, and Qc for specifying the electric vehicle for which quick charging has been instructed by the quick charging instruction switch 6, respectively. Storage area 3
3 are flags La, Lb, which indicate when the liquid level is detected by the liquid level detectors 163, 173, and 183 and the liquid level is below a predetermined level;
Memorize each LJ.

The storage area 34 stores flags Ta, Tb, and Tc that indicate when the concentration is detected by the temperature detectors 164, 174, and 184 and exceed a predetermined temperature.
memorize each. The storage area 39-5 stores the voltage level ya of the A storage battery 161 detected by the voltage detector 165 of the A electric vehicle 16 as 3-bit data. The storage area 36 similarly stores the voltage vb of the 8 storage batteries 171 of the B electric vehicle 17, and the storage area 3
7 stores the voltage VC of the C storage battery 181 of the C electric vehicle 18. The storage area 38 is the A storage battery 161. B storage battery 17
1. Seven lags X are stored for specifying which of the C storage batteries 181 should be given top priority for rapid charging. Storage area 39
stores a flag Y indicating the storage battery with the next highest priority. That is, in the storage areas 38 and 39, for example, if the A electric vehicle 16 has the highest priority (9), A is stored as X, and the Nichi electric vehicle 17 has the next highest priority. Store B as Y.

FIG. 3 is a specific circuit diagram of the changeover switch 12 shown in FIG. 1. This changeover switch 12 has contacts 121 to 126
including. The contacts 121 are closed when the respective output ends of the A charger 9 and the B charger 10 are connected in parallel.

Contact 122 is used when connecting the output ends of B charger-10-10 and C charger 1111 in parallel. In addition, the contact 123 is connected to the A charger 9 and the C charger 9.
It is closed when the respective output terminals of charging 1111 are connected in parallel. The contact 124 is closed when charging the A electric storage To 161 of the A electric vehicle 16, and the contact 125 is closed when charging the A electric storage To 161 of the A electric vehicle 16.
The contact 126 is closed when the storage battery 171 is charged, and the contact 126 is closed when the C storage battery 181 is charged. These contacts 121 to 126&tCPU1 to l104. Switching is performed based on a command signal given via the A:/Turf AIF. Thereby, for example, contact Ja12
1, 122 and 124 are closed, A charge 119°B charger 10. The respective output terminals of the C charger 11 are connected in parallel, and the pulsating current voltage of each phase is applied to the A storage battery 161.

FIG. 4 is an external view showing the panel surface of one embodiment of the present invention. The display 5 indicates charging, rapid charging, complete, insufficient liquid, 31
11 degrees, and the quick charging instruction switch 6 is connected to the terminal for not instructing quick charging.
OFF and A storage battery 161.8 storage battery 171.0 m
Contacts A, B, for giving instructions for quick charging to 1ai.
and C.

FIG. 5 is an illustrative diagram for explaining a charging sequence according to an embodiment of the present invention. Next, the charging sequence will be briefly explained with reference to FIG. 5. In this invention, the connection pattern of the chargers 9 to 11 connected in parallel by the changeover switch 12 is predetermined in accordance with the number of vehicles to be simultaneously charged. Further, this pattern is also changed in response to switching of the quick charge instruction switch 6. In other words, if the number of charging vehicles is one,
Ignoring the switching of the quick charging instruction switch 6, three charging units 119 to 11 are connected in parallel in an initial state to quickly charge one storage battery. When the voltage of the storage battery reaches a predetermined voltage, the number of chargers connected in parallel is reduced to two, and when the voltage reaches a predetermined voltage or higher, only one charger is used.

In addition, the charging time with only one charger is -
determined by a built-in timer.

In addition, when charging the storage batteries of two vehicles at the same time and the quick charging instruction switch 6 is switched to the OFF position, the two chargers are connected in parallel to quickly charge one storage battery. Then, use the remaining charger to gently charge the other storage battery. Then, when the voltage of one storage battery exceeds a predetermined value, the two chargers are combined into one, and the two chargers connected to the other storage battery are connected in a row. moreover,
When the voltage of the other storage battery exceeds a predetermined value, the charger is turned off.
Reduce to table. If two vehicles are to be charged, and one of the vehicles has been given a quick charge instruction, three chargers 9 to 11 are connected in parallel to one storage battery for quick charging. Then, when the voltage of the storage battery exceeds a predetermined voltage, the number of chargers is reduced to two, and the other storage battery is slowly charged using the remaining one charger. Further, when the voltage of one storage battery exceeds a predetermined value, the number of chargers is reduced to one, and the number of chargers for the other storage battery is increased to two.

13- When charging the storage batteries of three vehicles at the same time, each charge 119-1
1 to each charger individually for slow charging. If a quick charging instruction is given to one storage battery, three chargers 9 to 11 are connected in parallel to that storage battery for quick charging. When the voltage of the storage battery exceeds a predetermined value, the number of chargers is reduced to two, and the remaining one charger charges the storage battery selected as having the next highest priority. Further, when the voltage of the storage battery to which the rapid instruction is given exceeds a predetermined value, the number of chargers is reduced to one, and the remaining one storage battery is charged with that charger.

FIGS. 6 to 11 are flowcharts for explaining the specific operation of one embodiment of the present invention.

Next, the specific operation of one embodiment of the present invention will be described with reference to FIGS. 1 to 11. First, with reference to FIG. 6, when any of the plugs 13, 14, 15 is inserted into any of the electric vehicles 16, 17, 18, the plug insertion detector 162 included in each electric vehicle,
172.18214- detects it. This detection signal is from the connector 19°20
．． 21 to the interface 7. Furthermore, the detection signal is sent from the interface 7 to ■1
04 to the cpui. In addition, the liquid level detectors 163, 173, 183 included in each electric vehicle 16, 17, 18 are connected to each storage battery 161, 171.
, Detects the liquid level of 181 and detects the temperature! 1164.
174° and 184 detect each concentration, and voltage detection l
1165, 175, and 185 each detect voltage.

Signals detected by these detectors are given to CPU1.

In step 1, CPLll connects plugs 13°14.
15 is inserted, and when any of the insertion signals is input, in step 2, the flag and data are stored in the RAM 3 based on each detected data. . That is,
Based on the insertion signal, flags Qa to Qc representing the electric vehicle designated by the quick charge instruction switch 6 are stored in flags pa to P32 representing which of the electric vehicles 16, 17, and 18 the plug is inserted. . Furthermore, seven lags la, lb, and lc of the liquid level of the batteries 161, 171, and 181 are stored in the storage area 33, and temperature flags Ta and Tb are stored.

7c is stored in the storage area 34, and voltage data is stored in the storage areas 35-37. Furthermore, a priority order is determined based on the number of vehicles to which the plugs 13 to 15 are connected, the vehicle number for which quick charging is instructed by the quick charging instruction switch 6, and the pattern of the number of parallel operating chargers shown in FIG. 5 described above. .

That is, vehicle numbers with higher priorities are sequentially stored in storage areas 38 and 39.

After storing each data in the RAM 3, the CPU 1 proceeds to step 3. Then, based on the flags Pa to Pc stored in the storage area 31, it is determined whether the number of charged vehicles is one. That is, the flag p is stored in the storage area 31.
If any one of a-pc is set, N1. Proceed to the QNl subroutine. Storage area 3
If two flags are set in 1, it is determined in step 4 that the number of charging vehicles is 2, and the process proceeds to step 5. In step 5, each of the flags pa to pc stored in the storage area 31 is corresponded to. Then, it is determined whether the flags Qa to Qc are set in the storage value area 32. That is, in step 5, it is determined whether or not a quick charge instruction is given by the quick charge instruction switch 6. If a quick charge instruction has not been given, the process proceeds to subroutine N2 shown in FIG. 8, and if a quick charge instruction has been given, step 91! Proceed to subroutine QN2 shown in I. When it is determined in step 4 that the number of charging vehicles is three, it is determined in step 6 whether or not a quick charging instruction has been given to any of the three vehicles. Discern. If there is no quick charge instruction, N3 as shown in Figure 10
If a quick charge instruction has been given, the process advances to subroutine QN3 shown in FIG.

Next, 17 specific operations in each subroutine will be explained. First of all, only plug 13 is electric car 16
A case will be explained in which the number of charging vehicles is one. In this case, flags Pa, La, Ta, and Va are stored in each storage area of the RAM 3, respectively. Note that when there is only one vehicle to be charged, quick charging is forcibly achieved regardless of the instruction from the quick charging instruction switch 6.

In the subroutine shown in FIG. 7, X represents the symbol of the electric vehicle to be charged. Therefore, when charging the electric vehicle 16, x becomes A. First, in step 7, the CPU determines that the charging vehicle is the A electric vehicle 16 based on the flag pa, and determines whether the liquid level of the A storage battery 161 is normal based on the flag Qa. . If not normal, proceed to step 12; if normal, proceed to step 8. In step 8, it is determined whether the temperature of the A storage battery 161 is normal based on the flag Ta. If it is not normal, proceed to step 12.
If normal, a command is given to the selector switch 12 for rapid charging in the chargers 9 to 11. That is, the output terminals of the three charging units W9 to 11 are connected in parallel, and the output terminals of the three charging units W9 to 11 are connected in parallel, Voltage is A 161
given to. Note that each of the chargers 9 to 11 has a built-in timer, and outputs voltage only for a predetermined pupil plane set by the timer.

In step 10, the voltage level of the A storage battery 161 is V
It is determined whether or not the value exceeds a. This voltage v3 is charging I
! This is a predetermined voltage for switching the parallel connection of 9 to 11 from three to two, and data representing this voltage is set in a storage area (not shown) of the RAM 3. A
If the voltage va of the electricity storage m161 is 3 or less, the process proceeds to step 11.

In step 11, it is determined whether a flag other than the flag Pa stored in the storage area 31 has been set. That is, in this step 11, it is determined whether or not the insertion of the plug has been changed. If it has not been changed, return to step 8 again.

Note that, although generally a storage battery rises by m degrees rapidly during charging, the liquid level changes comparatively little, so it is determined whether the liquid level is normal or not only at the initial stage. Therefore, during charging, it is determined whether the temperature and voltage are normal.

The above operation is repeated, and in step 10 the voltage Va
When becomes v3 or higher, the process proceeds to step 12. Step 1
In step 2, it is determined again whether the liquid level is normal or not, and if it is not normal, the process proceeds to step 17. If it is normal, the process proceeds to step 13, where it is determined whether the density is normal or not. If not normal, proceed to step 1; if normal, proceed to step 14. In step 14, the CPU 1 gives a command signal to the changeover switch 12 to connect two chargers in parallel. In other words, the voltage of the A storage battery 161 is
When a becomes equal to or higher than v3, the changeover switch 12 opens the contact 122, for example, based on a command signal from the CPUI to reduce the number of chargers to two. As a result, the output terminals of A charge [19] and 8 charge W10 are connected in parallel, and the A power storage 161 is charged. Then, in step 15, it is determined whether the voltage a exceeds the voltage v2. This voltage v2 is a predetermined voltage for switching from two chargers to one, and is the voltage v3 mentioned above.
It is set in RAM3 in the same way. The voltage va is v
If it does not exceed 2, the process advances to step 16, where it is determined whether or not the plug has been changed. Below, steps 13-1
Repeat step 6, and when the voltage ya exceeds 8V2, step 1
Proceed to step 7. In step 17, a command signal is given from the CPU 1 to the changeover switch 12. Based on this switching signal, the changeover switch 12 opens its contact 121. Contact 121
Since the A storage battery 161 is opened, the A storage battery 161 is charged only by the 11A charging 119. Then, charging is performed for the timer set in A Charging - O, and when that time has elapsed, charging is stopped.

As described above, when the plug 13 is inserted into the A electric vehicle 16, three chargers 9--
11 are connected in parallel, and the parallel connection of the charger 21 can be switched from 3 to 2 and further from 2 to 1 depending on the charging voltage. Since the number of charging vehicles is one, the quick charging instruction switch 6
instructions are completely ignored and rapid charging is achieved.

Next, with reference to FIG. 8, the operation when two electric automatic *16°17 power storage units 6161, 171 are simultaneously charged with two charging units 119°10 will be explained. in this case,
Plugs 13.14 are respectively connected to electric vehicles 16.17, and RAM3 has flags pa, pb, La, l-b.
, Ta, Tb, Va.

vb are stored respectively. Furthermore, it is assumed that the B electric vehicle 17 is given a high priority and the electric vehicle 16 is given a low priority. For this purpose, B is stored in storage area 38 and 8 is stored in storage area 39. In step 18, the cpui is connected to the A charger 9.
In order to charge the storage battery 161, a command signal is given to the changeover switch 12. In response, switch 12 closes only its contacts 124. With that, A charge! I9 is A
It is connected to the power storage Ih161 to charge it. Ste 22
- In the knob 19, the CPU 1 selects B based on the flag Lb.
It is determined whether the liquid level of the storage battery 171 is normal. If not normal, proceed to step 24; if normal, proceed to step 20. In step 20, the flag Tb
&:l Then, it is determined whether the temperature of the B storage battery 171 is normal. If not normal, proceed to step 24; if normal, proceed to step 21. In step 21, cp
ui is a command signal for charging the B storage battery 171 by the 8 charger 10 and the C charger 111 by the changeover switch 12
give to Accordingly, the changeover switch 12 has its contacts 122
and 125 are closed. As a result, B charger 10 and C
The charger 1111 is connected in parallel to the B storage battery 171. Thereafter, the B storage battery 171 is charged based on the output voltages of the B charger 10 and the C charger 111.

In step 22, it is determined whether the voltage vb of the B storage battery 171 exceeds the voltage v2. This voltage v2 is the 7th m! It is the same as the voltage v2 in step 15 of 1. If the voltage vb does not exceed the voltage v2, it is determined in step 23 whether the plug insertion has been changed. If it has not been changed, the concentration T is changed again in step 20.
Determine whether b is normal. Below, step 20
Repeat steps 23 to 81 to store B power storage 81!171.
Rapid charging is performed using charging W10 and C charger 11.

When voltage vb exceeds voltage v2 in step 22,
In step 24, the B storage battery 171 is charged with B l111
A command signal for charging the battery only is given to the changeover switch 12. In response, transfer switch 12 opens contact 122;
Thereby, only the B charger 10 is connected to the 8 storage battery 171, and thereafter, slow charging is achieved.

Thereafter, the CPU 1 proceeds to step 25, and this time determines whether the liquid level 1-a of the A storage battery 161 is normal. Then, in step 26, it is determined whether the temperature Ta is normal, and in step 27, the contact 123 is closed and A
Charger 9 and C charger 11 are connected in parallel to form A storage battery 16.
Quickly charge 1. Thereafter, steps 26 to 29 are repeated in the same manner as steps 19 to 23 described above, that is, the B storage battery 171 is rapidly charged with the two chargers 9.11, and the voltage of the B storage battery 171 is set to a predetermined voltage. If this is the case, the number of chargers connected to the B storage battery 171 is reduced, and the number of chargers connected to the A storage battery 161 is increased. Then, when the voltage Va of the A storage battery 161 becomes equal to or higher than the voltage V2, in step 30, the number of chargers connected to the A storage battery *iei is reduced.

Next, when charging two storage batteries, it is assumed that a quick charging instruction is given to one of them.

For example, if the quick charge instruction switch 6 causes the A storage battery 1 to
When a quick charging instruction is given to 61, flag Qa is stored in storage area 32. Then, proceeding to the subroutine shown in FIG. 9, in steps 31 to 35,
A storage battery 1 is created by connecting three charging units 119 to 11 in parallel.
61 is quickly charged. This operation is the same as steps 7 to 11 in FIG. 7 described above. and,
When the voltage Va exceeds v3 in step 34, 82
5- Reduce the number of chargers connected to the storage battery 161 to two, and charge 8 storage batteries 171 with one charger. In this case, for example, if contacts 121 and 122 are opened and contacts 123 and 124 are closed, A storage battery 161 can be rapidly charged by A charger 9 and C charger 11, and contact 1
25, the eight storage batteries 171 can be slowly charged by the B charger 10.

By repeating steps 37 to 41, the A storage battery 161 can be rapidly charged by the A charger 9 and the C charger 11, and the B storage battery 171 can be slowly charged by the 8 charger 10.

This operation is the same as steps 12 to 16 above. Then, when the voltage of the A storage battery 161 exceeds v2, the parallel connection between the A charger 9 and the C charger 11 is disconnected, and the A storage battery 161 is now charged only by the A charger 9. and,
In steps 43 to 47, the B charger 10 and the C charger 1111 are connected in parallel to rapidly charge the B storage battery 171 with the two chargers. Then, the voltage v of the B storage battery 171
When b exceeds 26- predetermined voltage, C charger 11 is disconnected and 8
Eight storage batteries 171 are slowly charged only by charging 1110.

As mentioned above, when charging A storage battery 161 and No. 161 quickly charged, then B
Disconnect only the charger and connect it to the 8-storage battery 171, and then disconnect the IIC charger 11 from the A-storage battery 161.
71 can be charged quickly.

Next, with reference to FIG. 10, an explanation will be given of the operation when the number of charging vehicles is three and a quick charging instruction is not given to each vehicle. In this case, in step 49, the contact 124 of the changeover switch 12 is tapped to connect the A charge 119 to the A storage battery 161, and in step 5o, the contact 125 is closed to connect the B charge aio to the 8 storage battery 171! III, and in step 51 contact 12
6 can be heard. As a result, each storage battery 161 to 181 is charged individually.

If a quick charging instruction has been given to any of the three electric vehicles 16 to 18, the process advances to subroutine 11el. That is, for example, if the electric vehicle A 16
If a charging instruction has been given, steps 52 to 5
6, connect three charging units I9 to 11 in parallel to A
Connect to power storage a161. Then, when the voltage Va of the A storage battery 161 exceeds the voltage v3, the 8-charger 1110 is disconnected in step 57, and this B-charger iio is transferred to the 8-storage battery 17.
Connect to 1. Then, step 58 to step 2
At this time, the A storage battery 161 is rapidly charged by two charging units -9 and 11. Then, the voltage Va of the A storage battery 161 is V2
If it exceeds, the C charger 1111 is disconnected in step 63, and the C charger 11 is connected to the C storage battery 181 in step 64.

In other words, the number of charging vehicles is 3, and the A storage battery is 161.
If a quick charging instruction is given to the A storage battery 161, the number of chargers connected to the A storage battery 161 will be set to three in the initial state, and then the number of chargers connected in parallel will be reduced, and the remaining chargers will be used to sequentially connect the B storage battery 171. It is possible to slowly charge the °C storage battery a181.

In addition, in the operation shown in FIG. 11, the number of chargers connected to the A storage battery 161 is reduced in the order of 3-2-1-0,
When the number of chargers connected to the A storage battery 161 is two, the number of chargers connected to the B storage battery 171 is one, and
When the number of chargers connected to storage battery 161 is one, the number of chargers connected to C storage battery 181 is one. However, the present invention is not limited to this (if the number of chargers connected to the A storage battery 161 is one, the number of chargers connected to the B storage battery 171 is two, and in this case, the C storage battery 1
81 may not be connected to the charger. and,
B storage a! ! When the voltage of 171 becomes equal to or higher than a predetermined voltage, the number of charging batteries connected to B storage battery 171 is 1,
The number of chargers connected to the C power storage 11181 may be two.

29- As described above, according to the present invention, a plurality of chargers are connected in parallel, and the storage battery is connected to an electric vehicle connected to a connection means with a high priority determined in advance by these chargers. According to the state of charge of the storage battery, it is possible to charge the storage battery of the electric vehicle that is connected to the connection means with the next highest priority. Therefore, 5 runs per day
If the connection means connected to an electric vehicle with a long driving distance is given a high priority, the storage battery of the electric vehicle can be rapidly charged in one hour. Moreover, the number of chargers connected in parallel is reduced according to the state of charge of the storage batteries connected to the connection means selected with the highest priority, and other storage batteries are charged by the connection means with the next highest priority. As a result, multiple chargers can be used in a friendly manner without being idle, and the storage battery can be charged efficiently. Furthermore, in the second invention, the priority order of the connection means can be specified arbitrarily.

[Brief explanation of the drawing]

11th! I is a schematic block diagram 30 of an embodiment of the present invention.
- FIG. 2 is an illustrative diagram showing data stored in the RAM shown in FIG. 1. FIG. 3 is also a specific circuit diagram of the changeover switch. FIG. 4 is an external view of one embodiment of the present invention. FIG. 5 is an illustrative diagram for explaining a charging sequence according to an embodiment of the present invention. FIGS. 6, 7, 8, 9, 10, and 11 μ are 70-70 for explaining specific operations of an embodiment of the present invention, respectively.
It is a diagram. In the figure, 1 is a CPU, 3 is a RAM, 6 is a quick charge instruction switch, 8 is a three-phase power supply, 9 to 11 are chargers, 1
2 is a changeover switch, 121 to 126 are contacts, 13 to 15 are plugs, 16 to 18 are electric vehicles, 16
1,171.181 is Rose W Pond, 162,172,182
indicates a plug insertion detector, and 165, 175, and 185 indicate voltage detectors. Figure 7 Figure 8 Figure 10 Figure 11

Claims (1)

[Scope of Claims] (1) A charging device for charging storage batteries installed in each of a plurality of electric vehicles, including a plurality of chargers each outputting voltages with different phases, each of the chargers described above. a switching means for arbitrarily switching the output terminals of the charger and connecting them in parallel, and a plurality of connection means for connecting the output terminal of each of the chargers and any of the plurality of storage batteries, and the plurality of connection means are further provided with a priority order. is determined in advance, and the storage battery is connected to the connection means with a high priority in the initial state! Increase the - of the charger relatively,
Charge the storage battery! Decrease the number of chargers connected to the battery based on the status and prioritize next ^
A charging device for an electric vehicle, comprising a switch II control means that controls the switching means so as to increase the number of chargers that charge storage batteries connected to the second connection means. (2) The electric vehicle charging device according to claim 1, wherein the charger outputs a pulsating voltage whose phase varies according to each phase of a three-phase AC power source. (h) A charging device for charging the storage batteries installed in each of a plurality of electric vehicles, including a plurality of chargers each outputting a voltage of a different phase, and the output terminal of each of the chargers can be set arbitrarily. Niichi! a plurality of connecting means for i-connecting the output end of each of the chargers to any one of the plurality of storage batteries; a selection means for giving priority to any one of the plurality of unifying means; The number of chargers connected in parallel to charge the storage battery connected to the selected connection means is relatively increased by the means, and the number of chargers connected in parallel is increased based on the state of charge of the storage battery. the switching means for controlling the switching means to decrease the number of battery chargers connected to the connection means having the next highest priority according to the selection means or a predetermined order. A charging device for an electric vehicle, comprising a control means. (4) Claim 3, wherein the charger outputs pulsating current voltages having different phases depending on each phase of a three-phase AC power supply. Charging of the electric vehicle described am.