JPH11146653A - Power supply for electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply for an electric vehicle which can improve the rigging work and can easily design the equipment for weight balancing. SOLUTION: A reactor 5 and a capacitor 6, which have been stored in a trans box 3A in the conventional equipment, are stored in an inverter box 1A. Therefore, cables 7 which connect the inverter box 1A and the transformer box 3A come in an after stage of the reactor 5 and the capacitor 6, and the voltage and current waves on the cables 7 are normal ones clear of direct noise.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for an electric vehicle, and more particularly, to a technique for fitting a power supply device to an electric vehicle.

[0002]

2. Description of the Related Art FIG. 7 is a circuit diagram of a conventional electric vehicle power supply device. In this figure, inverter box 1
Inside, an inverter device 2 including a switching element such as an IGBT, a smoothing capacitor, a current detector, and the like.
Is stored, and in the transformer box 3,
An output transformer 4, a reactor 5 for removing harmonics, and a capacitor 6 for shaping an output waveform are housed therein. The inverter device 2 and the reactor 5 are connected by a cable 7, and the secondary side of the output transformer 4 is connected by a cable 8 to a load-side device (not shown).

FIG. 8 is an explanatory diagram showing the arrangement of the inverter box 1 and the transformer box 3 shown in FIG. 7 under the floor of a vehicle. As shown in this figure, an inverter box 1 and a transformer box 3 are arranged continuously along the traveling direction of the vehicle 9, and another device 10 is provided on the opposite side of the inverter box 1 and the transformer box 3. It is arranged. In this case, the other devices 10 include:
In consideration of the right and left balance of the vehicle 9, the type of equipment is selected so as to be as equal as possible to the total weight of the inverter box 1 and the transformer box 3 side. And
The cable 7 between the inverter device 2 in the inverter box 1 and the reactor 5 in the transformer box 3 is connected through shield ducts 11, 12, and 13.

FIG. 9 is a side view of FIG. 8 viewed from the direction AA. As shown in this figure, the cable 7 extending from the inverter device 2 in the inverter box 1 to the transformer box 3 side passes through the shield ducts 11 and 12 via the terminal block 14 and the reactor 5 in the transformer box 3. It is connected to the.

FIG. 10 is an explanatory diagram showing the arrangement of each device inside the transformer box 3 in FIG. 8, and FIG. 11 is a side view of FIG. 10 as viewed from the direction BB. As shown in these figures, the transformer box 3 is formed with a sealed chamber 15 having a waterproof structure and an open chamber 16 whose periphery is covered with a net cover or the like.
, A capacitor 6 and a terminal block 14 are provided, and an open chamber 16 is provided with an output transformer 4 and a reactor 5. Further, terminal blocks 14 connected to the output side of the inverter device 2 are provided in two shield ducts 13 adjacent to the open chamber 16.

[0006]

In the above-described conventional configuration, as shown in FIG. 7, the voltage or current waveform on the cable 7 connecting the inverter box 1 and the transformer box 3 is formed by the reactor 5 and the capacitor 6. Is included in a large amount of noise (this noise is called “direct noise” in the technical field). In order to prevent this direct noise from adversely affecting peripheral devices, as shown in FIGS.
Are covered by shield ducts 11 to 13.

However, such shield ducts 11 to 11
The presence of 13 complicates equipment installation work, wiring work, and the like under the vehicle floor, and is a factor that hinders improvement in workability in outfitting work.

As shown in FIG. 8, the inverter box 1 and the transformer box 3 are both arranged on one side of the vehicle 9. This is because the transformer box 3 housing the reactor 5 and the condenser 6 has a considerable weight, and if the transformer box 3 and the inverter box 1 are arranged on opposite sides, the left and right balance of the vehicle 9 will be reduced. Because you can no longer take
However, conversely, since the inverter box 1 and the transformer box 3 are arranged on the same side, devices corresponding to the total weight of these must be collected and arranged as another device 10, and the weight balance must be increased. Had to struggle with the outfitting design to take.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is intended for an electric vehicle capable of improving workability in outfitting work and easily performing outfitting design for achieving weight balance. It is intended to provide a power supply.

[0010]

Means for Solving the Problems As means for solving the above problems, the invention according to claim 1 is an inverter device housed in an inverter box, an output transformer housed in a transformer box, and an inverter device. A reactor and a capacitor connected between the power transformer and an output transformer, and in a power supply device for an electric vehicle disposed below the floor of the vehicle, the reactor and the capacitor are housed in the inverter box. It is characterized by.

According to a second aspect of the present invention, in the first aspect of the present invention, the inverter box and the transformer box are disposed at positions facing each other with a center line along a longitudinal direction of the vehicle interposed therebetween. , Characterized in that.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a lead wire connecting the inverter device and the output transformer is connected to the output box without a terminal block in the transformer box. Connected to a transformer.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. However, the same components as those shown in FIGS. 7 to 11 are denoted by the same reference numerals, and redundant description will be omitted.

FIG. 1 is a circuit diagram of a power supply device for an electric vehicle according to an embodiment of the present invention. As shown in this figure, the reactor 5 and the capacitor 6 housed in the transformer box in the conventional device of FIG.
It is stored on the A side. Therefore, the cable 7 connecting the inverter box 1A side and the transformer box 3A side.
The upper voltage or current waveform is on the subsequent stage of the reactor 5 and the capacitor 6, and is a clean waveform from which direct noise has been removed.

FIG. 2 is an explanatory diagram showing the arrangement of the inverter box 1A and the transformer box 3A shown in FIG. 1 under the floor of the vehicle. In FIG. 8, the periphery of the cable 7 connecting the inverter box 1 side and the transformer box 3 side is covered with shield ducts 11 to 13, but in FIG. 2, such a shield duct is not provided. This is because the cable 7 connecting the side of the inverter box 1A and the side of the transformer box 3A is located after the reactor 5 and the capacitor 6 housed in the inverter box 1A. As described above, since the shield duct is not provided, the electric vehicle power supply device according to the present invention can improve workability in outfitting work such as equipment mounting work and wiring work. It has become.

In addition, the inverter box 1A has a large weight since the reactor 5 and the capacitor 6 are housed therein. Therefore, it is possible to dispose the transformer box 3A so as to face the inverter box 1A with the center line along the longitudinal direction of the vehicle 9 therebetween. As described above, since the transformer box 3A can be disposed on the opposite side of the inverter box 1A, other transformer boxes 3A and other devices 10A are balanced so that the weight of the inverter box 1A and the weight of the transformer box 3A and other devices 10A are balanced. What is necessary is just to arrange an apparatus in the apparatus 10A. Therefore, unlike the conventional apparatus, there is no need to struggle with the outfitting design for achieving the weight balance.

FIG. 3 is a side view of FIG. 2 as viewed from the direction of arrows CC. As shown in this figure, the inverter box 1A
A terminal block 14 is provided inside the inverter device 2.
And the terminal block 14 are connected by a lead wire 24. Also, a terminal block 14 is provided in the transformer box 3A.
Are connected by a lead wire 20. The terminal blocks 14 in the inverter box 1A and the transformer box 3A are connected to each other by a cable 7.

FIG. 4 shows the transformer box 3 shown in FIG.
FIG. 5 is a front view showing the structure of A, and FIG. 5 is a side view of FIG. The output transformer 4 in the transformer box 3 </ b> A is attached to the flange portion 17 using a bolt member 18, and the periphery thereof is covered with a net cover 19. A lead wire 20 having a crimp terminal 21 at the tip extends from a lower portion of the output transformer 4. As shown in FIG.
As shown in FIG. 0, it was necessary to provide a closed chamber 15 for accommodating the capacitor 6, but in the present invention, since the reactor 5 and the capacitor 6 are accommodated in the inverter box 1A, the transformer box 3A It is no longer necessary to provide a closed chamber.

Although the illustration of the structure of the inverter box 1A side is omitted, the portion accommodating the reactor 5 is the same as the transformer box 3A.
9 to promote the heat radiation of the reactor 5, and the portion housing the inverter device 2 and the capacitor 6 has a sealed structure having a waterproof function.

FIG. 6 shows a wiring structure of an output transformer 4 according to another embodiment of the present invention. The lead 20A of the output transformer 4 in FIG.
Is much longer than the lead wire 20 of the output transformer 4 at the center, and the middle part thereof is
The crimp terminal 21 is connected to the terminal block 14 on the side of the inverter box 1A while being supported by 23. Then, the terminal block 1 in the transformer box 3A in FIG.
4 is omitted.

Normally, the lead wire of a transformer shipped from a transformer maker is not so long, and when this lead wire is connected to another remote device, another long lead wire and terminal block are required on the user side. Wiring work had to be performed by preparing such items. Therefore, in the related art, a considerable amount of labor has been spent for wiring work around the output transformer 4, but according to the configuration of FIG. 6, the labor required for such wiring work can be reduced.

[0022]

As described above, according to the present invention, the reactor and the capacitor, which were conventionally housed in the transformer box, are housed in the inverter box. In addition to being able to plan, outfitting design for achieving weight balance can be easily performed.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of an electric vehicle power supply device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an arrangement state of an inverter box 1A and a transformer box 3A shown in FIG. 1 under a vehicle floor.

FIG. 3 is a side view of FIG. 2 as viewed from the direction of arrows C-C.

FIG. 4 is a front view showing the structure of a transformer box 3A in FIG. 3;

FIG. 5 is a side view of FIG. 4 as seen from the direction D-D.

FIG. 6 is an explanatory diagram showing a wiring structure of an output transformer 4 according to another embodiment of the present invention.

FIG. 7 is a circuit configuration diagram of a conventional electric vehicle power supply device.

FIG. 8 is an explanatory diagram showing an arrangement state of the inverter box 1 and the transformer box 3 shown in FIG. 7 under a vehicle floor.

FIG. 9 is a side view of FIG. 8 viewed from the direction AA.

FIG. 10 is an explanatory diagram showing an arrangement state of each device inside the transformer box 3 in FIG. 8;

FIG. 11 is a side view of FIG. 10 viewed from the direction BB.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A Inverter box 2 Inverter device 3, 3A Transformer box 4 Output transformer 5 Reactor 6 Capacitor 7 Cable 8 Cable 9 Vehicle 10, 10A Other devices 11 Shield duct 12 Shield duct 13 Shield duct 14 Terminal block 15 Sealed room 16 Open room 17 Flange part 18 Bolt member 19 Mesh cover 20, 20A, 24 Lead wire 21 Crimp terminal 22, 23 Support bracket

Claims (3)

[Claims] 1. An inverter device housed in an inverter box, an output transformer housed in a transformer box, and a reactor and a capacitor connected between the inverter device and the output transformer, which are located under the floor of the vehicle. A power supply device for an electric vehicle, wherein the reactor and the capacitor are housed in the inverter box. 2. The electric vehicle according to claim 1, wherein the inverter box and the transformer box are disposed at positions facing each other with a center line along the longitudinal direction of the vehicle therebetween. Power supply. 3. The transformer according to claim 1, wherein a lead wire connecting the inverter device and the output transformer is connected to the output transformer without a terminal block in the transformer box. 2. The power supply device for an electric vehicle according to 2.