CN101138963B

CN101138963B - Electrical device cooling structure in vehicle

Info

Publication number: CN101138963B
Application number: CN2007101497469A
Authority: CN
Inventors: 深津友博; 西堀毅雄; 涩谷健太郎; 川田政夫; 山口浩央; 藤泽纯也; 中野笃; 小坂裕
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2006-09-07
Filing date: 2007-09-05
Publication date: 2012-02-29
Anticipated expiration: 2027-09-05
Also published as: JP2008062780A; JP4832225B2; CN101138963A

Abstract

In a power supply unit (19) disposed below a floor behind a seat, battery modules (37) are disposed in a lower position, and a DC/DC converter (41) and a motor driving inverter (42) are disposed side by side in a vehicle width direction above the battery modules (37). Thus, cooling air flowing from the front side to the rear side of a vehicle body is divided into upper and lower portions to cool in parallel the DC/DC (41) and the motor driving inverter (42) on the upper side and the battery modules (37) on the lower side. Thus, it is possible to simplify a passage of the cooling air to reduce the size of the entire power supply unit (19), and improve mountability of the power supply unit (19) on the vehicle body. Also, it is possible to apply cooling air at low temperature before heat exchange to all the battery module (37), the DC/DC converter (41), and the motor driving inverter (42), thereby enhancing cooling effect.

Description

The cooling construction of vehicular electrical equipment

Technical field

The present invention relates to a kind of vehicular electrical equipment cooling construction; It will comprise being used to drive go and be arranged on the below of the base plate at seat rear with battery, DC/DC conv and the direct motor drive of electrical motor with the electrical equipment of current transformer, with coolant air this electrical equipment cooled off.

Background technology

Knownly open in the 2003-45392 communique in Japanese Patent Laid; Disclose a kind of following technology: the supply unit that will comprise the battery that going of self-propelled vehicle driven with electrical motor carries in the baggage container at the rear of back seat, through being made as the coolant air that the forced air supply machine of one supplies with this supply unit battery is cooled off.

In addition; Open in the 2005-153827 communique in Japanese Patent Laid; Also disclose following a kind of technology: will comprise that the driving motor-driven vehicle going is located at the below of seat afterwards with battery, DC/DC conv, the direct motor drive of electrical motor with the electrical storage device of current transformer, cooling fan etc., the coolant air that aspirates with cooling fan cools off with current transformer battery, DC/DC conv and direct motor drive.

; Open in the technology of 2003-45392 communique record in above-mentioned Japanese Patent Laid; Disclose the method that the coolant air supplied with the forced air supply machine cools off the battery of supply unit, but do not related to the content that the DC/DC conv that comprises in the supply unit and direct motor drive are cooled off with current transformer.

In addition; Open in the technology of putting down in writing in the 2005-153827 communique in above-mentioned Japanese Patent Laid; With battery, DC/DC conv, direct motor drive with current transformer and cooling fan along overall width direction arranged in series, with the coolant air of cooling fan suction battery, DC/DC conv and direct motor drive are cooled off with current transformer successively.

In this case; Coolant air battery, DC/DC conv, direct motor drive are cooled off with current transformer during; Because heat exchange temperature raises gradually; Even, still have the possibility that fully to cool off with current transformer the direct motor drive in downstream so can the battery of upstream side be cooled off fully.And; Since with battery, D C/D C conv, direct motor drive with current transformer and cooling fan arranged in series; Therefore cause the elongated change of size of supply unit big; Its assembling on vehicle is very limited, also can causes stream opposing to increase, and need problem large-scale, performance-oriented cooling fan because of cooling air channels.

Summary of the invention

The present invention is just in view of said situation and design-calculated, and its purpose is, avoids being used to drive the maximization of going with the electrical equipment of the floor below at rear electrical motor, that be arranged on seat, simultaneously, improves its cooling performance.

In order to reach above-mentioned purpose; According to the 1st characteristic of the present invention; Proposed a kind of cooling construction of electrical equipment of vehicle, it will comprise being used to drive go and be configured in the below of the base plate at rear, seat with battery, DC/DC conv and the direct motor drive of electrical motor with the electrical equipment of current transformer, through coolant air this electrical equipment cooled off; Wherein, Be set up in parallel said DC/DC conv and said direct motor drive is used current transformer on the top of said battery along the overall width direction, the coolant air that rearward flows from vehicle body the place ahead is divided into two strands up and down, and the said battery of downside and the said DC/DC conv and the said direct motor drive of upside are cooled off with current transformer abreast; Wherein, At overall width direction one side of said battery configuration high-tension distribution panel, the extension of this high-tension distribution panel is extended to the top from the upper end of said battery, with said extension with said DC/DC conv or be located at said direct motor drive and be connected with the smooth condenser on the current transformer.

According to above-mentioned formation; Be used for driving the electrical equipment that goes with the floor below at rear electrical motor, that be arranged on the seat; Battery is located at the bottom, and DC/DC conv and direct motor drive are placed side by side setting at an upper portion thereof with current transformer along the overall width direction, therefore; The coolant air that flows to the rear from vehicle body the place ahead is divided into two strands up and down, can cool off with current transformer the battery of downside and the DC/DC conv and the direct motor drive of upside abreast.Thus; The passage that not only can simplify coolant air makes the electrical equipment miniaturization; Improve its assembling to vehicle body; Can also make cooling down air before the interchange of heat in whole with current transformer of battery, DC/DC conv and direct motor drive, thus the raising cooling performance, and can reduce the crushing of coolant air.

In addition; According to above-mentioned formation; Because extension is connected the DC/DC conv or is located at direct motor drive with on the smooth condenser on the current transformer; This extension is to make the high-tension distribution panel of overall width direction one side that is configured in battery prolong to the top from the upper end of this battery, thereby can cancel or shorten to greatest extent high-tension distribution panel, smooth condenser, DC/DC conv and direct motor drive with carrying out the bonded assembly lead between the current transformer.

In addition, according to the 2nd characteristic of the present invention, proposed a kind of cooling construction of vehicular electrical equipment, except above-mentioned the 1st characteristic, configuration is used for cutting off the contactless switch from the electric current of battery on said high-tension distribution panel.

According to above-mentioned formation, be used for cutting off contactless switch owing on high-tension distribution panel, disposed from the electric current of battery, therefore can cancel or shorten to greatest extent the lead that connects between battery, contactless switch and the electrical equipment.

In addition; According to the 3rd characteristic of the present invention; A kind of cooling construction of vehicular electrical equipment has been proposed; On the above-mentioned the 1st or 2 characteristics, said DC/DC conv and said direct motor drive are accommodated in current transformer in the common can that is fixed on the vehicle body, below this can, are supported with said battery.

According to above-mentioned formation; Owing to be accommodated in DC/DC conv and said direct motor drive in the common can that is fixed on the vehicle body with current transformer; Below this can, be supported with said battery; Not only can cut off effectively from DC/DC conv and direct motor drive electric noise through can with current transformer; Can also be through cell arrangement that weight is bigger at downside, DC/DC conv that weight is lighter and direct motor drive are configured in upside with current transformer and improve the stability of vehicle body.

In addition; According to the 4th characteristic of the present invention; A kind of cooling construction of vehicular electrical equipment has been proposed; Outside above-mentioned the 1st characteristic, said battery has been carried out the cooling air of cooling and the cooling air interflow that said DC/DC conv and said direct motor drive have been carried out cooling with current transformer, the cooling fan in the downstream through being configured in its interflow portion is discharged from.

According to above-mentioned formation, owing to can reduce the crushing of coolant air, therefore can adopt small-sized and cheap cooling fan, it is arranged on the downstream of the interflow portion of coolant air.

In addition, according to the 5th characteristic of the present invention, proposed a kind of cooling construction of vehicular electrical equipment, outside above-mentioned the 4th characteristic, said cooling fan is a tube axial fan.

According to above-mentioned formation, because cooling fan is made up of tube axial fan, therefore compare with the situation of the centrifugal fan that adopts complex structure and costliness, can cost-cutting.And, through battery and electrical controller are carried out parallel cooling the crushing of coolant air is diminished, therefore,, also can guarantee sufficient cooling performance even adopt cheap tube axial fan.

In addition; According to the 6th characteristic of the present invention; A kind of cooling construction of vehicular electrical equipment has been proposed, outside the above-mentioned the 4th or the 5th characteristic, on the bottom surface of the base plate member at said cooling fan rear; Two strands of coolant air escape routes about the overall width direction forms, this coolant air escape route will be discharged to body exterior the coolant air that said electrical equipment has carried out cooling off.

According to above-mentioned formation; Because on the bottom surface of the base plate member at cooling fan rear; Towards about the overall width direction, form two strands and will carry out the coolant air escape route that cooled coolant air is discharged to body exterior said electrical equipment; So not only can prevent that the superjacent air space of base plate member from narrowing down through the coolant air escape route; The flow path cross sectional area that can also fully guarantee the coolant air escape route in cooling fan downstream further reduces crushing, thereby alleviates the load of cooling fan.

In addition; The back seat 16 corresponding seats of the present invention of embodiment; The power subsystem unit 19 corresponding electrical equipments of the present invention of embodiment, the heel slab 17 corresponding base plates of the present invention of embodiment, the upper resin box 32 corresponding base plate members of the present invention of embodiment; The battery module 37 corresponding batteries of the present invention of embodiment, the lower metal box 45 of embodiment and upper metal box 46 corresponding cans of the present invention.

According to accompanying drawing,, can make above-mentioned the present invention, other purpose, characteristic and advantage clearer and more definite in the following detailed description that suitable embodiment is carried out.

Description of drawings

Fig. 1～Fig. 9 is the figure of expression embodiments of the invention.

Fig. 1 is the whole lateral plan of motor vehicle driven by mixed power;

Fig. 2 be Fig. 1 want portion's enlarged drawing;

Fig. 3 is the exploded perspective view of resin box and power subsystem unit;

Fig. 4 is the exploded perspective view of power subsystem unit;

Fig. 5 is the view of 5 directions among Fig. 2;

Fig. 6 is the 6-6 line section drawing of Fig. 5;

Fig. 7 is the 7-7 line section drawing of Fig. 6;

Fig. 8 is the 8-8 line section drawing of Fig. 7;

Fig. 9 is the Action Specification figure of power subsystem unit cooling.

The specific embodiment

Below, according to Fig. 1～Fig. 9 embodiments of the invention are described.

Like Fig. 1 and shown in Figure 2, not shown driving engine and electrical motor are possessed as the motor vehicle driven by mixed power of exercising drive source: the preceding seat of forming by the seat cushion 11 and the seat back of the body 12 13; The back seat of forming by seat cushion 14 and the seat back of the body 15 16.Below the seat cushion 11 of preceding seat 13, be provided with tanks 17, and below the luggage space 18 at seat 16 rears, back, be equipped with the power subsystem unit 19 that is used for driving motor.

Be provided with a pair of pillar that can fold 20,20 about the seat cushion 14 of back seat 16 following; In the running condition of back seat 16; End with

hook

22,22 card that is located on the seat lower shoe 21 lower end of

pillar

20,20, and the rear end of seat cushion 14 and the seat cushion fastener that on the protrusion 23 that is located at seat lower shoe 21 rears, is provided with 24 cards are ended and fix.The seat back of the body 15 tilting axiss via the rear end that is located at seat cushion 14 (reclining shaft) 25 can forwards lodge.

So when the seat cushion fastener of protrusion 23 was opened in 24 minutes,

pillar

20,20 was that fulcrum forwards shakes to link up with 22,22 with the rear end of seat cushion 14, thus, seat cushion 14 parallel beneath forward moves and drops to the position of the lower shoe 21 along the seat.And, be that the center makes the seat back of the body 15 swing forwards with tilting axis 25, thereby can make seat fold back seat 16 (with reference to the dotted line among the figure 2) with carrying on the back 15 approximate horizontal.

The rear of the protrusion 23 at lower shoe 21 rears at the seat is connected with the power subsystem unit incorporating section 26 of depression downwards, and the back base plate 27 (with reference to figure 5) that is configured the base plate of luggage space 18 around the upper surface open portion of this power subsystem unit incorporating section 26 covers.

Below, according to Fig. 3～Fig. 8 the structure of power subsystem unit 19 is described.

The box of taking in power subsystem unit 19 is made up of container-like bottom resin box 31 and the upper resin box 32 that is the cap-like of general planar.The front portion of resin box 31 in the bottom; The coolant air suction passage 31a～31c of 3 tubuloses of integrally formed oriented vehicle body front openings and towards vehicle body left side side the tubulose coolant air suction passage 31d of opening, and in the bottom rear portion of resin box 31 is formed with 2 groove shape coolant air escape route 31e, the 31f that extends in the overall width direction.

Coolant air suction passage 31a～31c is opened on the rear end of the seat cushion 14 of back seat 16, through the air (with reference to figure 6) in the following suction compartment of seat cushion 14.In addition, coolant air suction passage 31d is opened on the sidepiece of the seat cushion 14 of back seat 16, aspirates the air in the compartment from here.The coolant air escape route 31e of groove shape, 31f are through constituting air flue with the interaction that is bonded to its lip-deep upper resin box 32.

The pars intermedia of resin box 31 in the bottom, horizontal fixed has deflector shield 33, drives the cooling fan driving motor 35 of the cooling fan 34 that is made up of tube axial fan, and quilt supports (with reference to figure 6) with the motor bracket 33a that this deflector shield 33 is integrally formed.Bottom box 31 attenuates in the position of cooling fan 34, is formed with the power subsystem unit ingathering chamber 36 of big volume in its front side, is communicated with said coolant

air escape route

31e, 31f at its rear side.Therefore, through being guided the coolant air at rear behind the cooling fan 34, among the coolant air escape route 31e about being assigned to, the 31f.

Power subsystem unit 19 possesses the cylindrical battery modules 37 that are configured to 12 of 3 layers of totals of 4 row ..., these battery modules 37 ... Be split into up and down 4 parts, be clamped in by two groups battery bracket 39 about 2 bolted by boundling ... Between.At this moment, deflector shield 40 is layered on undermost battery bracket 39 following, by said bolt 38 ... Tighten (with reference to figure 8).With undermost battery module 37 ... The upper surface of relative deflector shield 40 uprises, promptly approaches undermost battery module 37 with rear side ... Mode tilt.

Moreover power subsystem unit 19 possesses: with the battery module that is electrically connected in series 37 ... The DC/DC conv 41 of high voltage drop to 12 volt; With battery module 37 ... DC current convert alternating current to and direct motor drive that the driving of electrical motor is controlled with current transformer (PDU) 42; Be located at the ECU 43 on the PC board; Direct motor drive is with the smooth condenser 44 of current transformer 42 usefulness; These DC/DC convs 41, direct motor drive are with current transformer 42, ECU 43 and smooth condenser 44 ... Be incorporated in the space of being divided by lower metal box 45 and upper metal box 46; This lower metal box 45 is the container-like of upper surface opening, and this upper metal box 46 is by many bolts 47 ... Be combined on the upper surface of lower metal box 45, be smooth lid shape.So, the high pressure base part of the major cause through will causing electric noise is accommodated in the space that is surrounded by lower metal box 45 and upper metal box 46, can remove the influence that electric noise causes miscellaneous equipment.

DC/DC conv 41 and direct motor drive are configured in the left side and the right side of overall width direction respectively side by side with current transformer 42; Above DC/DC conv 41, dispose ECU 43, on the upper surface of direct motor drive, dispose 3 smooth condensers 44 with current transformer 42 ...

Said can 45 is by many bolts 50 ... Be fixed on 2 power subsystem unit supports 49,49 below, these 2 power subsystem unit supports 49,49 with about 48,48 of curb girders on the overall width direction.In addition, the boundling battery module 37 ... About two Battery pack supports 39 ... By 51 hangings of many bolts be fixed on lower metal box 45 below.At this moment, at the bottom surface of lower metal box 45 and the battery module 37 of the superiors ... Upper surface between, accompany the insulator 52 of plastic foam system.

So; In power subsystem unit 19, heavier battery module 37 ... Be arranged on downside, the DC/DC conv 41 little than weight is arranged on battery module 37 with direct motor drive with current transformer 42 ... Upside; Therefore can reduce the center of gravity of power subsystem unit 19, thereby improve the stability of vehicle.

On lower metal box 45, be formed with bottom surface opening opposing 45a and the direct motor drive of DC/DC conv 41 bottom surface opening opposing 45b with current transformer 42; On the upper surface of the insulator 52 that two

opening

45a, 45b face, be formed with the 2 air guide channel 52a, the 52b (with reference to figure 7) that extend at fore-and-aft direction.To the outstanding a plurality of cooling fan 41a in the bottom surface of DC/DC conv 41 ... Opening 45a through lower metal box 45; Be projected in the air guide channel 52a of insulator 52; To direct motor drive with the outstanding a plurality of cooling fan 42a in the bottom surface of current transformer 42 ...,, be projected in the air guide channel 52b of insulator 52 through the opening 45b of lower metal box 45.

In addition; With the battery module 37 of the superiors ... The lower surface of the relative insulator 52 of upper surface on; Be formed with the 52c of rank portion (with reference to figure 8) that extends in the overall width direction; At the front side of the 52c of this rank portion, battery module 37 ... The lower surface of upper surface and insulator 52 between the interval wide, narrow down at the said interval of rear side.

Range upon range of be 3 layers battery module 37 ... Right flank on dispose dimetric tabular high-tension distribution panel 53.The top of high-tension distribution panel 53 becomes the battery module 37 than the superiors ... The extension 53a that more extends of upper surface to the top, the left surface of this extension 53a and direct motor drive are with the right flank adjacency of current transformer 42, in relative position extension.And, the extension 53a of high-tension distribution panel 53 and smooth condenser 44 ... Connected by pair of terminal 54,54.In addition, at the right flank of high-tension distribution panel 53, be provided with switch from battery module 37 ... Electric current contactless switch 55, detect to flow into or flow out battery module 37 ... The current sensor 56 of electric current.

The power subsystem unit 19 that so constitutes is incorporated in the inside of bottom resin box 31, and the upper resin box 32 that covers its upper surface open portion is by many bolts 57 ... Fixing.In this state, it is identical that upper resin box 32 and the height of back base plate 27 become, and constitutes the floor of luggage space jointly.

Secondly, the effect to the embodiments of the invention that possess above-mentioned formation describes.

When the current drives of supplying with power subsystem unit 19 is gone and is used electrical motor; The battery module 37 of power subsystem unit 19 ..., DC/DC conv 41, direct motor drive can heatings with current transformer 42 etc.; Therefore need cool off them with coolant air, this coolant air drives cooling fan 34 through fan drive motor 35 and produces.

As shown in Figure 6, when cooling fan 34 rotates, in by the power subsystem unit ingathering chamber 36 of

bottom resin box

31 and 32 divisions of upper resin box, produce negative pressure, the air in the compartment is drawn in the power subsystem unit ingathering chamber 36 from 4 coolant air suction passage 31a～31d.In power subsystem unit ingathering chamber 36 inside; This coolant air is that the boundary is to shunting up and down with insulator 52; The coolant air that flows to the below is through being set as 3 layers of battery module 37 that adds up to 12 of 4 row ... Between the space flow to the rear, during this period to battery module 37 ... Cool off.

At this moment; As shown in Figure 8; With undermost battery module 37 ... The relative deflector shield in bottom surface 40 be inclined upwardly towards the rear; And with the battery module 37 of the superiors ... The lower surface of the relative insulator 53 of upper surface on be formed with the 52c of rank portion, so the flow path cross sectional area in the downstream of power subsystem unit ingathering chamber 36 dwindles, and the flow velocity of coolant air is uprised.Thus, can be effectively to the battery module 37 in the downstream that is difficult to cool off ... Cool off, thereby reach all battery modules 37 ... Even cooling.

In addition; Like Fig. 6, Fig. 7 and shown in Figure 9; Be diverted to the coolant air of insulation division 52 upsides, the left and right sides air guide channel 52a, the 52b branch that are formed on along fore-and-aft direction on insulation division 52 upper surfaces are opened, and flow to the rear from the place ahead; Wherein one with from the opening 45a of lower metal box 45 downwards the cooling fan 41a of outstanding DC/DC conv 41 contact; This DC/DC conv 41 is cooled off, and another strand contacts with the cooling fan 42a of the downward direct motor drive of giving prominence to of the opening 45b of lower metal box 45 with current transformer 42, and this direct motor drive is cooled off with current transformer 42.

So, power subsystem unit 19 is carried out cooled coolant air collaborate once more, among the left and right sides coolant air escape route 31e through being diverted to cooling fan 34 rears behind the cooling fan 34, the 31f.In overall width direction left side and the left and right sides coolant air escape route 31e of right-hand branch, the downstream end of 31f, flow in the liner and the space between the boot-mounted wing of luggage space 18, a part is excluded outside the car, and another part is returned in the compartment.At this moment, pass in the compartment in order not make exhaust noise, also can be at coolant air escape route 31e, the last sound arrester that disposes of 31f.

The power subsystem unit incorporating section 26 that on the base plate 27 of back, forms, this space be usually as the incorporating section of spare tyre, through this space is used for taking in power subsystem unit 19, can be not the luggage space 18 at seat 16 rears, back do not caused compressing.In addition, cover the upper resin box 32 of the surface opening portion of the bottom resin 31 of taking in power subsystem unit 19, link to each other at grade, constitute the smooth floor of luggage space 18, therefore can improve the usability of luggage space 18 with back base plate 27.

In addition; At the battery module 37 that by boundling is 12 ... Top divide right and left configuration DC/DC conv 41 and direct motor drive with current transformer 42; The upper support ECU 43 of DC/DC conv 41; Support smooth condenser 44 in direct motor drive with the top of current transformer 42 ..., moreover, dispose high-tension distribution panel 53 in their side; So not only can be formed in the power subsystem unit incorporating section 26 of back on the base plate 27, can also cancel and connect the lead between them or make weak pointization of lead with being received into easily behind power subsystem unit 19 close modes.For example; Through contactless switch 55 is set on high-tension distribution panel 53; Can cancel and connect battery module 37 ... With the lead of direct motor drive with current transformer 42; Perhaps, can pass through 54,54 couples of this extension 53a of terminal and smooth condenser 44 without lead through on high-tension distribution panel 53, forming extension 53a ... Connect.

In addition; Be inhaled into the coolant air in the power subsystem unit ingathering chamber 36 in the bottom resin box 31; At the battery module of being shunted up and down downside 37 ... Cool off abreast with current transformer 42 with the DC/DC conv 41 and the direct motor drive of upside; So can make cooling down air and these battery modules 37 before the interchange of heat ..., DC/DC conv 41 and direct motor drive are with current transformer 42 contacts and evenly cool off, and can the crushing of coolant air be controlled to bottom line.Thus, need not to adopt expensive centrifugal fan (for example sirocco fan), only need cheap tube axial fan can guarantee sufficient cooling performance as cooling fan 34.

If to battery module 37 ..., when DC/DC conv 41 and direct motor drive are connected cooling with current transformer 42; Exist the cooling performance of the equipment be configured in upstream side to be improved, and be configured in the problem that the cooling performance of the equipment in downstream descends, and; Also there is the another one problem; Promptly, need to adopt performance-oriented cooling fan 34 and cooling fan driving motor 35, thereby become the essential factor that cost raises because the crushing of coolant air increases.

In addition; Because the coolant air escape route 31e, the 31f that flow through through the coolant air behind the cooling fan 34 are divided into two strands; Therefore can fully ensure total flow path cross sectional area of coolant

air escape route

31e, 31f; And the back pressure of cooling fan 34 is reduced, thereby further alleviate the load of cooling fan driving motor 35.And, owing to coolant

air escape route

31e, 31f are formed on the bottom surface of upper resin box 32, promptly on the bottom surface of back base plate 27, so can not oppress the volume of luggage space 18.

More than, embodiments of the invention are illustrated, but so long as in the scope that does not exceed main idea of the present invention, can carry out various design modifications.

For example, in an embodiment, enumerated the hybrid motor vehicle that possesses driving engine and electrical motor as exercising drive source, but the present invention also is applicable to the battery-driven car that only possesses electrical motor as the enforcement drive source.

Claims

1. the cooling construction of the electrical equipment of a vehicle; It will comprise being used to drive go and be configured in the below of the base plate at rear, seat with battery, DC/DC conv and the direct motor drive of electrical motor with the electrical equipment of current transformer; Through coolant air this electrical equipment is cooled off; Wherein, be set up in parallel said DC/DC conv and said direct motor drive is used current transformer on the top of said battery along the overall width direction, the coolant air that rearward flows from vehicle body the place ahead is divided into two strands up and down; The said battery of downside and the said DC/DC conv and the said direct motor drive of upside are cooled off with current transformer abreast

Wherein, Overall width direction one side configuration high-tension distribution panel at said battery; The extension of this high-tension distribution panel is extended to the top from the upper end of said battery, with said extension with said DC/DC conv or be located at said direct motor drive and be connected with the smooth condenser on the current transformer.

2. the cooling construction of the electrical equipment of vehicle as claimed in claim 1 wherein, disposes the contactless switch of cut-out from the electric current of said battery on said high-tension distribution panel.

3. according to claim 1 or claim 2 the cooling construction of electrical equipment of vehicle, wherein, said DC/DC conv and said direct motor drive are accommodated in current transformer in the common can that is fixed on the vehicle body, below this can, are supported with said battery.

4. the cooling construction of the electrical equipment of vehicle as claimed in claim 1; Wherein, Said battery has been carried out the cooling air of cooling and the cooling air interflow that said DC/DC conv and said direct motor drive have been carried out cooling with current transformer, and the cooling fan in the downstream through being configured in its interflow portion is discharged from.

5. the cooling construction of the electrical equipment of vehicle as claimed in claim 4, wherein, said cooling fan is a tube axial fan.

6. like the cooling construction of the electrical equipment of claim 4 or 5 described vehicles; Wherein, On the bottom surface of the base plate member at said cooling fan rear; Two strands of coolant air escape routes about the overall width direction forms, this coolant air escape route will be discharged to body exterior the coolant air that said electrical equipment has carried out cooling off.