WO2013084939A1 - Battery pack for electric vehicle - Google Patents

Battery pack for electric vehicle Download PDF

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Publication number
WO2013084939A1
WO2013084939A1 PCT/JP2012/081509 JP2012081509W WO2013084939A1 WO 2013084939 A1 WO2013084939 A1 WO 2013084939A1 JP 2012081509 W JP2012081509 W JP 2012081509W WO 2013084939 A1 WO2013084939 A1 WO 2013084939A1
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WO
WIPO (PCT)
Prior art keywords
passage
cooling
cooling air
passages
battery
Prior art date
Application number
PCT/JP2012/081509
Other languages
French (fr)
Japanese (ja)
Inventor
片山　吾一
康晶 保戸塚
山本　康一
Original Assignee
本田技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to JP2013548269A priority Critical patent/JP5843177B2/en
Publication of WO2013084939A1 publication Critical patent/WO2013084939A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6552—Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention provides a battery pack for an electric vehicle in which a plurality of batteries are mounted on a battery tray having a cooling passage connected to a cooling air inlet and a cooling air outlet, and the battery is cooled by cooling air flowing through the cooling passage.
  • the present invention relates to a battery pack for electric vehicles.
  • the single battery cell group is supported on the upper surface of the heat sink covering the upper surface opening of the box-shaped partition wall, and the heated single battery cell group is cooled with the cooling air by flowing cooling air through the cooling passage inside the partition wall.
  • the central portion of the battery tray is likely to be relatively hot because the entire circumference is surrounded by the battery.
  • the end portion tends to be relatively low temperature because only the surrounding half circumference is surrounded by the battery.
  • the cooling effect is the same at the center and the end of the battery tray simply by flowing cooling air from one end to the other end of the cooling passage formed inside the battery tray.
  • the battery located on the end side of the battery tray becomes low temperature due to the high temperature of the battery located on the center side and the life of the high temperature battery is shortened.
  • the present invention has been made in view of the above-described circumstances, and an object thereof is to equalize the temperature of a plurality of batteries supported by a battery tray through which cooling air flows.
  • a plurality of batteries are placed on a battery tray having a cooling passage connected to a cooling air inlet and a cooling air outlet, and the cooling air flowing through the cooling passage is used.
  • the battery pack for an electric vehicle that cools the battery wherein the cooling passage includes a first cooling passage whose upstream end is connected to the cooling air inlet, and a downstream end that is disposed on both sides of the first cooling passage.
  • the first cooling passage is connected to the first passage through which cooling air flows in a first direction and the downstream side of the first passage, and And a second passage through which cooling air flows in a second direction opposite to the first direction, wherein the first passage and the second passage are adjacent to each other.
  • the first cooling passage includes an upstream portion connected to a part of the third cooling passage, and the third cooling passage.
  • a downstream portion connected to a part of the downstream portion, wherein the downstream end of the upstream portion and the downstream end of the downstream portion are attached to each other with a blocking member for blocking the flow of cooling air interposed therebetween.
  • a fourth cooling passage connecting the first cooling passage and the second cooling passage is provided, and an inlet portion of the fourth cooling passage is the first cooling passage.
  • a battery pack for an electric vehicle is proposed, which is provided in the upstream portion of the passage.
  • the battery module 42 of the embodiment corresponds to the battery of the present invention
  • the third passage forming member 45c of the embodiment corresponds to the blocking member of the present invention
  • the second passage b of the embodiment is the present invention.
  • the third passage c of the embodiment corresponds to the upstream portion of the present invention.
  • the cooling passage of the battery tray on which the battery is placed is disposed on both sides of the first cooling passage whose upstream end is connected to the cooling air inlet and the first cooling passage. Since the downstream end includes two second cooling passages connected to the cooling air discharge port and the third cooling passage connecting the first cooling passage and the two second cooling passages, the battery is likely to be relatively hot.
  • the cooling air flowing through the first cooling passage located on the central portion side of the tray has a low temperature and a large flow rate, and the cooling air flowing through the second cooling passage located on both end portions of the battery tray that tends to be relatively low in temperature is high.
  • the temperature of a plurality of batteries can be made uniform by reducing the flow rate.
  • the first passage of the first cooling passage through which the cooling air flows in the first direction and the first passage connected to the downstream side of the first passage are opposite to the first direction. Since the second passage of the first cooling passage through which the cooling air flows in the second direction is adjacent to each other, the relatively low temperature cooling air flowing through the first passage on the upstream side and the second passage on the downstream side are arranged. By exchanging heat with the relatively high-temperature cooling air that flows, the temperature of the cooling air in the first passage and the second passage can be made uniform to cool the battery uniformly.
  • the first cooling passage includes an upstream portion and a downstream portion, the upstream portion is connected to a part of the third cooling passage, and the downstream portion is the third cooling passage. Connected to the other part of. Since the downstream end of the upstream portion and the downstream end of the downstream portion are abutted against each other with a blocking member for blocking the flow of the cooling air, supplied from the cooling air suction port to the upstream portion of the first cooling passage The cooling air can be blocked by the blocking member and actively supplied to a part of the third cooling passage. Thereby, the cooling air in the upstream portion of the first cooling passage flows into the downstream portion and is supplied only to the other part of the third cooling passage, and is difficult to be supplied to a part of the third cooling passage. The situation can be avoided.
  • the inlet portion of the fourth cooling passage connecting the first cooling passage and the second cooling passage is provided in the upstream portion of the first cooling passage.
  • the cooling air flowing in the upstream portion can be blocked by the blocking member and can be positively supplied from the inlet portion to the fourth cooling passage.
  • FIG. 1 is a side view of an electric vehicle.
  • FIG. 2 is a perspective view of the battery pack.
  • FIG. 3 is an exploded perspective view of the battery tray.
  • FIG. 4 is a view showing a cooling air passage in the battery tray.
  • (First embodiment) 5 is a cross-sectional view taken along line 5-5 of FIG.
  • (First embodiment) 6 is a cross-sectional view taken along line 6-6 of FIG.
  • (First embodiment) 7 is a cross-sectional view taken along line 7-7 of FIG.
  • First embodiment) 8 is a cross-sectional view taken along line 8-8 of FIG.
  • (First embodiment) 9 is a view taken in the direction of arrow 9 in FIG. (First embodiment)
  • a body frame 11 of an electric vehicle includes a pair of left and right floor frames 12 and 12 extending in the longitudinal direction of the vehicle body, and left and right extending forward while bending upward from the front ends of the floor frames 12 and 12.
  • a pair of front side frames 13, 13, a pair of left and right rear side frames 14, 14 that extend rearward while bending upward from the rear ends of the floor frames 12, 12, and the floor frames 12, 12 are disposed on the outside in the vehicle width direction.
  • a pair of left and right side sills 15, 15, a pair of left and right front outriggers 16, 16 that connect the front ends of the side sills 15, 15 to the front ends of the floor frames 12, 12, and the rear ends of the side sills 15, 15 are the floor frames 12, 12.
  • a pair of left and right rear outriggers 17 and 17 connected to the rear end, and a pair of left and right front side A front bumper beam 18 connecting the front ends of the frames 13, 13 in the vehicle width direction, a front cross member 19 connecting the front ends of the pair of left and right floor frames 12, 12 in the vehicle width direction, and a pair of left and right floors
  • a rear bumper beam 22 that connects the rear end portions of the pair of left and right rear side frames 14, 14 in the vehicle width direction is provided.
  • a battery pack 31 serving as a power source of a motor / generator 23 that is a driving source for driving an electric vehicle is supported by being suspended from the lower surface side of the vehicle body frame 11. That is, a front suspension beam 32, a middle suspension beam 33 and a rear suspension beam 34 extending in the vehicle width direction are fixed to the lower surface of the battery pack 31, and both ends of the front suspension beam 32 are a pair of left and right floor frames. 12, both ends of the middle suspension beam 33 are fixed to the rear part of the pair of left and right floor frames 12, 12, and both ends of the rear suspension beam 34 are in front of the pair of left and right rear side frames 14, 14. It fixes to the lower end of the supporting members 35 and 35 which hang down from a part.
  • the vehicle width direction center portion of the front end of the battery pack 31 is supported by the front cross member 19 via the front bracket 36, and the vehicle width direction center portion of the rear end of the battery pack 31 is supported via the rear bracket 37. Supported by the cross member 21. Further, the battery pack 31 is supported on the lower surface of the middle cross member 20 at an intermediate position between the front hanging beam 32 and the middle hanging beam 33.
  • the battery pack 31 of the present embodiment is disposed outside the vehicle compartment 25.
  • the battery pack 31 includes a battery tray 38 made of metal and a battery cover 39 made of synthetic resin that is superimposed on the battery tray 38 from above.
  • the peripheral portion of the battery tray 38 and the peripheral portion of the battery cover 39 are fastened by a large number of bolts 41 with the seal member 40 (see FIG. 2) interposed therebetween, so that the interior of the battery pack 31 is basically sealed. Space.
  • On the upper surface of the battery tray 38 a plurality of battery modules 42 are stacked in which a plurality of battery cells are stacked in series.
  • the battery tray 38 and the battery cover 39 constitute the battery case 24 of the present invention.
  • the battery tray 38 is formed by joining an upper plate 43 and a lower plate 44 with a plurality of passage forming members 45a to 45i interposed therebetween, and a cooling passage through which cooling air flows. Is formed, heat exchange is performed with the battery modules 42 contacting the upper surface of the upper plate 43, and the battery modules 42 that generate heat by charging and discharging are cooled. Further, a battery support member 27 is supported at a position higher by a pair of left and right legs 28 and 29 at the rear portion of the battery tray 38, and two battery modules 42 and 42 are supported on the upper surface thereof. A cooling passage is formed inside the battery support member 27.
  • the cooling device 46 provided at the rear portion of the battery pack 31 includes a suction duct 48 disposed at the center in the vehicle width direction and a pair of left and right discharge ducts 49, 49 disposed on both sides of the suction duct 48 in the vehicle width direction. Prepare.
  • the lower end of the suction duct 48 is connected to the upstream end of the cooling passage of the battery tray 38, and the lower ends of the left and right discharge ducts 49, 49 are connected to the downstream end of the cooling passage of the battery tray 38.
  • a cooling air suction port 48a for sucking air outside the battery pack 31 as cooling air is provided in the upper front surface of the suction duct 48 in which the upstream suction passage 54 and the downstream suction passage 55 are formed. Open forward.
  • the discharge ducts 49, 49 are upstream discharge passages 56, 56 that rise upward from the downstream ends of the left and right cooling passages of the battery tray 38, and downstream sides that are continuous from the upper ends of the upstream discharge passages 56, 56 to the inside in the vehicle width direction.
  • Discharge passages 57 and 57 are provided, and cooling fans 47 and 47 are disposed immediately below the downstream discharge passages 57 and 57.
  • the outer periphery of the cooling fans 47, 47 is surrounded by spiral fan casings 58, 58, and cooling air discharge ports 49a, 49a are opened at the outer ends thereof.
  • the cooling air sucked from the cooling air suction port 48a of the suction duct 48 is supplied to the inside of the battery tray 38, and flows through the cooling passage inside the battery tray 38. After exchanging heat with 42..., The air passes through the cooling fans 47 and 47 of the discharge ducts 49 and 49 and is discharged from the cooling air discharge ports 49a and 49a. Part of the cooling air flows through the cooling passage inside the battery support member 27 and cools the two battery modules 42 and 42 supported on the upper surface thereof.
  • FIG. 9 is a top view of the lower plate 44 to which the passage forming members 45a to 45i are fixed.
  • the cooling passage of the battery pack 31 is a first cooling that extends in the vehicle width direction central portion of the lower plate 44 in the front-rear direction. Passing between the passage P1, the pair of left and right second cooling passages P2 and P2 extending in the front-rear direction at both ends in the vehicle width direction of the lower plate 44, and the first cooling passage P1 and the second cooling passages P2 and P2 The plurality of third cooling passages P3... Extending, and a fourth cooling passage P4 (see FIG. 3) formed in the rear portion of the lower plate 44 in the vehicle width direction.
  • the first cooling passage P1 is composed of a first passage forming member 45a made of corrugated plate, and second passage forming members 45b surrounding the front portion and the left and right side portions, and is an outlet at the lower end of the suction duct 48.
  • the part 48b faces the rear end of the first passage forming member 45a.
  • Three parallel first passages a extending forward from the outlet portion 48b are formed in the first passage forming member 45a.
  • the downstream end of the first passage a is U-turned to the left and right, and is connected to the left and right second passages b and b extending rearward between the front half of the first passage forming member 45a and the second passage forming members 45b and 45b.
  • left and right third passages c, c extending forward between the second half of the first passage forming member 45a and the second passage forming members 45b, 45b are formed.
  • the second passages b and b and the third passages c and c are arranged on the same straight line, and the abutting portions of both are blocked by third passage forming members 45c and 45c extending in the vehicle width direction.
  • the third cooling passages P3 are constituted by fourth passage forming members 45d made of twelve corrugated plates, and a plurality of fourth passages d extending from the inner side to the outer side in the vehicle width direction are formed therein.
  • the second and third passages b, b; c, c and the fourth passages d are communicated by communication holes p (see FIG. 8) formed in the left and right second passage forming members 45b.
  • the left and right second cooling passages P2, P2 are formed substantially symmetrically, and the outer ends in the vehicle width direction of the four fourth passage formation members 45d, which are located in front of the third passage formation members 45c, 45c.
  • the left and right fifth passage forming members 45e, 45e extending in the front-rear direction are arranged, and the left and right fifth passages e extending in the front-rear direction between the fourth passage forming member 45d...
  • the fifth passage forming members 45e, 45e. , E are formed.
  • Left and right sixth passage forming members 45f, 45f extending in the front-rear direction are disposed at the outer ends in the vehicle width direction of the four fourth passage forming members 45d ... located behind the third passage forming members 45c, 45c, Left and right eighth passages h, h extending in the front-rear direction are formed between the fourth passage formation member 45d... And the sixth passage formation members 45f, 45f, and the sixth passage formation members 45f, 45f are outside in the vehicle width direction. Left and right sixth passages f, f extending in the front-rear direction are formed. The downstream end of the fifth passages e, e and the upstream end of the sixth passages f, f are connected by seventh passage forming members 45g, 45g.
  • the left and right eighth passage forming members 45h, 45h extending in the front-rear direction are disposed at the outer ends in the vehicle width direction of the four fourth passage forming members 45d located at the rearmost positions, and the fourth passage forming members 45d,.
  • Left and right ninth passages i, i extending in the front-rear direction are formed between the eighth passage forming members 45h, 45h, and left and right second passages extending in the front-rear direction outward of the eighth passage forming members 45h, 45h in the vehicle width direction.
  • Seven passages g and g are formed.
  • the downstream ends of the sixth passages f, f and the eighth passages h, h are connected to the upstream ends of the seventh passages g, g.
  • the downstream ends of the seventh passages g, g and the ninth passages i, i are connected to the left and right discharge ducts 49, 49 via a pair of inlet portions 49b, 49b.
  • a tenth passage j extending from the inner side to the outer side in the vehicle width direction is formed between the second and third third passage forming members 45c, 45c from the rear on the left side.
  • the upstream end of the tenth passage j communicates with the left third passage c through a communication hole q (see FIG. 8) formed in the second passage forming member 45b.
  • the downstream end of the tenth passage j blocked by the ninth passage forming member 45 i is connected to the inlet portion 28 a at the lower end of the left leg portion 28.
  • An outlet 29a at the lower end of the right leg 29 is connected between the sixth and eighth passages f and h on the right side and the seventh passage g.
  • the battery modules 42 accommodated in the battery case 24 of the battery pack 31 generate heat due to charging / discharging, they are cooled by the cooling air supplied to the inside of the battery tray 38 by the cooling device 46. That is, when the cooling fans 47 are driven, air between the upper surface of the battery case 24 and the lower surface of the floor panel 26 is sucked as cooling air from the cooling air inlet 48a of the suction duct 48, and the upstream suction passage of the suction duct 48. 54 and the downstream suction passage 55 to be supplied into the battery tray 38 (see FIG. 5).
  • the cooling air passes through the fourth passage d formed by the four fourth passage forming members 45d through the communication holes p formed in the second passage forming members 45b and 45b (see FIG. 8).
  • the left and right fifth passage forming members 45e and 45e flow backward, and further the seventh passage is formed.
  • the sixth passages f and f outside the sixth passage forming members 45f and 45f in the vehicle width direction and the eighth passage forming members 45h and 45h outside the vehicle width direction are deflected by the members 45g and 45g toward the outside in the vehicle width direction. 7 flows backward through the passages g and g, and is discharged from the inlet portions 49b and 49b to the discharge ducts 49 and 49.
  • the cooling air flowing forward in the left and right third passages c, c formed by the first passage formation member 45a and the second passage formation members 45b, 45b hits the third passage formation members 45c, 45c, and a part thereof is the first
  • the left and right sixth passage forming members 45f and 45f are examples of the cooling air flowing forward in the left and right third passages c, c formed by the first passage formation member 45a and the second passage formation members 45b, 45b.
  • the eighth passage forming members 45h and 45h are discharged from the inlet portions 49b and 49b to the discharge ducts 49 and 49 via the seventh passages g and g outside the vehicle width direction.
  • Other part of the cooling air flowing forward in the left and right third passages c, c is the four fourth passage formation members 45d at the rearmost from the communication holes p ... formed in the second passage formation members 45b, 45b.
  • the left and right ninth passages i formed by the four fourth passage forming members 45d and the left and right eighth passage forming members 45h, 45h are allowed to flow through the fourth passage d formed by the , I flows rearward and is discharged from the inlet portions 49b, 49b to the discharge ducts 49, 49.
  • the other part of the cooling air flowing forward through the left third passage c flows into the tenth passage j from the communication hole q (see FIG. 8) formed in the second passage forming member 45b, and from there into the inlet portion 28a. Then, it flows from the left to the right through the tenth passage j inside the battery support member 27 through the left leg portion 28, and flows into the right seventh passage g through the right leg portion 29 and the outlet portion 29a.
  • the battery modules 42 supported on the upper surfaces thereof can be cooled.
  • relatively low-temperature cooling air before heat exchange flows through the first cooling passage P1 disposed in the vehicle width direction central portion of the battery tray 38, and both end portions of the battery tray 38 in the vehicle width direction.
  • the relatively high-temperature cooling air after heat exchange flows, and the flow rate of the cooling air flowing through the central first cooling passage P1 is the right and left second cooling passages. Since the flow rate of the cooling air flowing through the passages P2 and P2 is twice, the temperature difference between the central portion and the outer peripheral portion of the battery tray 38 is compensated to cool all the battery modules 42 uniformly, and the temperature difference between them Can be reduced.
  • the first cooling passage P1 has upstream first passages a through which the cooling air flows forward and downstream second passages b and b through which the cooling air flows backward.
  • the relatively low-temperature cooling air flowing through the first passages a on the side and the relatively high-temperature cooling air flowing through the second passages b, b on the downstream side exchange heat, so that the first passage a ...
  • the temperature of the cooling air flowing through the second passages b and b can be made uniform to cool the battery modules 42.
  • the third passages c and c through which the cooling air directly supplied from the cooling air suction port 48a flows forward are provided. Since the downstream ends of the passages c and c and the second passages b and b facing each other are partitioned by the third passage forming members 45c and 45c, all the passages connected to the third passage c and c and the second passages b and b are all made. A sufficient amount of cooling air can be evenly supplied to the third cooling passages P3.
  • the fourth cooling passage P4 provided at a position spaced upward from the battery tray 38 is difficult to be supplied with a sufficient amount of cooling air because the flow passage resistance is increased, but is stopped by the third passage forming member 45c. Since the cooling air is branched from the third passage c to the fourth cooling passage P4, a sufficient amount of cooling air can be positively supplied to the fourth cooling passage.
  • the cooling air suction port 48a and the cooling air discharge port 49a are provided at the rear end portion of the battery tray 38, but they may be provided at the front end portion or one of the left and right side portions of the battery tray 38. .

Abstract

This battery pack for an electric vehicle, wherein a cooling passage of a battery tray (38) on which batteries (42) are mounted is provided with: a first cooling passage (P1) having an upstream end that is connected to a cooling air inlet (48a); two second cooling passage (P2) that are positioned on either side of the first cooling passage (P1), and have a downstream end connected to a cooling air outlet (49a); and a third cooling passage (P3) that connects the first cooling passage (P1) and the two second cooling passages (P2). Thus, cooling air that flows through the first cooling passage (P1), which tends to become comparatively hot and is positioned at the center of the battery tray (38), attains a low temperature and high flow rate, and cooling air that flows through the second cooling passages (P2), which tend to be comparatively cold and are positioned on either side of the battery tray (38), attains a high temperature and low flow rate, thereby enabling the temperature of a plurality of batteries (42) to be homogenized.

Description

電動車両用バッテリパックBattery pack for electric vehicles
　本発明は、冷却空気吸入口および冷却空気排出口に接続された冷却通路を有するバッテリトレーに複数のバッテリを載置し、前記冷却通路を流れる冷却空気で前記バッテリを冷却する電動車両用バッテリパック電動車両用バッテリパックに関する。 The present invention provides a battery pack for an electric vehicle in which a plurality of batteries are mounted on a battery tray having a cooling passage connected to a cooling air inlet and a cooling air outlet, and the battery is cooled by cooling air flowing through the cooling passage. The present invention relates to a battery pack for electric vehicles.
　箱状の区画壁の上面開口部を覆うヒートシンクの上面に単電池セル群を支持し、区画壁の内部の冷却通路に冷却空気を流すことで、発熱した単電池セル群を冷却空気で冷却するものが、下記特許文献１により公知である。 The single battery cell group is supported on the upper surface of the heat sink covering the upper surface opening of the box-shaped partition wall, and the heated single battery cell group is cooled with the cooling air by flowing cooling air through the cooling passage inside the partition wall. This is known from the following patent document 1.
日本特開２００９－３０１８７７号公報Japanese Unexamined Patent Publication No. 2009-301877
　ところで、バッテリトレーの上面に発熱部材である複数のバッテリを並べて支持した場合、バッテリトレーの中央部は周囲の全周がバッテリで取り囲まれるために比較的に高温になり易く、逆にバッテリトレーの端部は周囲の半周だけがバッテリで取り囲まれるために比較的に低温になり易いという傾向がある。 By the way, when a plurality of batteries, which are heat generating members, are supported side by side on the upper surface of the battery tray, the central portion of the battery tray is likely to be relatively hot because the entire circumference is surrounded by the battery. The end portion tends to be relatively low temperature because only the surrounding half circumference is surrounded by the battery.
　しかしながら、バッテリトレーの内部に形成した冷却通路の一端側から他端側に直線状に冷却空気を流すだけでは、バッテリトレーの中央部と端部とで冷却効果が同じになるため、バッテリトレーの中央部側に位置するバッテリが高温になってバッテリトレーの端部側に位置するバッテリが低温になり、高温なるバッテリの寿命が短くなる問題がある。 However, the cooling effect is the same at the center and the end of the battery tray simply by flowing cooling air from one end to the other end of the cooling passage formed inside the battery tray. There is a problem that the battery located on the end side of the battery tray becomes low temperature due to the high temperature of the battery located on the center side and the life of the high temperature battery is shortened.
　本発明は前述の事情に鑑みてなされたもので、内部を冷却空気が流れるバッテリトレーに支持した複数のバッテリの温度を均一化することを目的とする。 The present invention has been made in view of the above-described circumstances, and an object thereof is to equalize the temperature of a plurality of batteries supported by a battery tray through which cooling air flows.
　上記目的を達成するために、本発明によれば、冷却空気吸入口および冷却空気排出口に接続された冷却通路を有するバッテリトレーに複数のバッテリを載置し、前記冷却通路を流れる冷却空気で前記バッテリを冷却する電動車両用バッテリパックであって、前記冷却通路は、上流端が前記冷却空気吸入口に接続される第１冷却通路と、前記第１冷却通路の両側に配置されて下流端が前記冷却空気排出口に接続される二つの第２冷却通路と、前記第１冷却通路および前記二つの第２冷却通路を接続する第３冷却通路とを備えることを第１の特徴とする電動車両用バッテリパックが提案される。 In order to achieve the above object, according to the present invention, a plurality of batteries are placed on a battery tray having a cooling passage connected to a cooling air inlet and a cooling air outlet, and the cooling air flowing through the cooling passage is used. The battery pack for an electric vehicle that cools the battery, wherein the cooling passage includes a first cooling passage whose upstream end is connected to the cooling air inlet, and a downstream end that is disposed on both sides of the first cooling passage. Has two first cooling passages connected to the cooling air discharge port, and a third cooling passage connecting the first cooling passage and the two second cooling passages. A vehicle battery pack is proposed.
　また本発明によれば、前記第１の特徴に加えて、前記第１冷却通路は、第１の方向に冷却空気が流れる第１通路と、前記第１通路の下流側に接続されて前記第１の方向とは逆の第２の方向に冷却空気が流れる第２通路とを備え、前記第１通路および前記第２通路は相互に隣接することを第２の特徴とする電動車両用バッテリパックが提案される。 According to the invention, in addition to the first feature, the first cooling passage is connected to the first passage through which cooling air flows in a first direction and the downstream side of the first passage, and And a second passage through which cooling air flows in a second direction opposite to the first direction, wherein the first passage and the second passage are adjacent to each other. Is proposed.
　また本発明によれば、前記第１または第２の特徴に加えて、前記第１冷却通路は、前記第３冷却通路の一部に接続される上流側部分と、前記第３冷却通路の他の一部に接続される下流側部分とを備え、前記上流側部分の下流端および前記下流側部分の下流端は冷却空気の流れを阻止する阻止部材を挟んで相互に付き当てられることを第３の特徴とする電動車両用バッテリパックが提案される。 According to the invention, in addition to the first or second feature, the first cooling passage includes an upstream portion connected to a part of the third cooling passage, and the third cooling passage. A downstream portion connected to a part of the downstream portion, wherein the downstream end of the upstream portion and the downstream end of the downstream portion are attached to each other with a blocking member for blocking the flow of cooling air interposed therebetween. The battery pack for an electric vehicle having the third feature is proposed.
　また本発明によれば、前記第３の特徴に加えて、前記第１冷却通路および前記第２冷却通路を接続する第４冷却通路を備え、前記第４冷却通路の入口部は前記第１冷却通路の前記上流側部分に設けられることを第４の特徴とする電動車両用バッテリパックが提案される。 According to the invention, in addition to the third feature, a fourth cooling passage connecting the first cooling passage and the second cooling passage is provided, and an inlet portion of the fourth cooling passage is the first cooling passage. A battery pack for an electric vehicle is proposed, which is provided in the upstream portion of the passage.
　尚、実施の形態のバッテリモジュール４２は本発明のバッテリに対応し、実施の形態の第３通路形成部材４５ｃは本発明の阻止部材に対応し、実施の形態の第２通路ｂは本発明の下流側部分に対応し、実施の形態の第３通路ｃは本発明の上流側部分に対応する。 The battery module 42 of the embodiment corresponds to the battery of the present invention, the third passage forming member 45c of the embodiment corresponds to the blocking member of the present invention, and the second passage b of the embodiment is the present invention. Corresponding to the downstream portion, the third passage c of the embodiment corresponds to the upstream portion of the present invention.
　本発明の第１の特徴によれば、バッテリを載置するバッテリトレーの冷却通路は、上流端が冷却空気吸入口に接続される第１冷却通路と、第１冷却通路の両側に配置されて下流端が冷却空気排出口に接続される二つの第２冷却通路と、第１冷却通路および二つの第２冷却通路を接続する第３冷却通路とを備えるので、比較的に高温になり易いバッテリトレーの中央部側に位置する第１冷却通路を流れる冷却空気が低温かつ大流量になり、比較的に低温になり易いバッテリトレーの両端部側に位置する第２冷却通路を流れる冷却空気が高温かつ小流量になることで、複数のバッテリの温度を均一化することができる。 According to the first aspect of the present invention, the cooling passage of the battery tray on which the battery is placed is disposed on both sides of the first cooling passage whose upstream end is connected to the cooling air inlet and the first cooling passage. Since the downstream end includes two second cooling passages connected to the cooling air discharge port and the third cooling passage connecting the first cooling passage and the two second cooling passages, the battery is likely to be relatively hot. The cooling air flowing through the first cooling passage located on the central portion side of the tray has a low temperature and a large flow rate, and the cooling air flowing through the second cooling passage located on both end portions of the battery tray that tends to be relatively low in temperature is high. Moreover, the temperature of a plurality of batteries can be made uniform by reducing the flow rate.
　また本発明の第２の特徴によれば、第１の方向に冷却空気が流れる第１冷却通路の第１通路と、第１通路の下流側に接続されて前記第１の方向とは逆の第２の方向に冷却空気が流れる第１冷却通路の第２通路とを相互に隣接させたので、上流側の第１通路を流れる比較的に低温の冷却空気と、下流側の第２通路を流れる比較的に高温の冷却空気とが熱交換することで、第１通路および第２通路の冷却空気の温度を均一化してバッテリを均一に冷却することができる。 According to the second aspect of the present invention, the first passage of the first cooling passage through which the cooling air flows in the first direction and the first passage connected to the downstream side of the first passage are opposite to the first direction. Since the second passage of the first cooling passage through which the cooling air flows in the second direction is adjacent to each other, the relatively low temperature cooling air flowing through the first passage on the upstream side and the second passage on the downstream side are arranged. By exchanging heat with the relatively high-temperature cooling air that flows, the temperature of the cooling air in the first passage and the second passage can be made uniform to cool the battery uniformly.
　また本発明の第３の特徴によれば、第１冷却通路は上流側部分および下流側部分を備え、上流側部分は第３冷却通路の一部に接続され、下流側部分は第３冷却通路の他の一部に接続される。上流側部分の下流端および下流側部分の下流端は冷却空気の流れを阻止する阻止部材を挟んで相互に突き合わされるので、冷却空気吸入口から第１冷却通路の上流側部分に供給された冷却空気を阻止部材で阻止して第３冷却通路の一部に積極的に供給することができる。これにより、第１冷却通路の上流側部分の冷却空気が下流側部分に流入して第３冷却通路の他の一部だけに供給されてしまい、第３冷却通路の一部に供給され難くなる事態を回避することができる。 According to a third aspect of the present invention, the first cooling passage includes an upstream portion and a downstream portion, the upstream portion is connected to a part of the third cooling passage, and the downstream portion is the third cooling passage. Connected to the other part of. Since the downstream end of the upstream portion and the downstream end of the downstream portion are abutted against each other with a blocking member for blocking the flow of the cooling air, supplied from the cooling air suction port to the upstream portion of the first cooling passage The cooling air can be blocked by the blocking member and actively supplied to a part of the third cooling passage. Thereby, the cooling air in the upstream portion of the first cooling passage flows into the downstream portion and is supplied only to the other part of the third cooling passage, and is difficult to be supplied to a part of the third cooling passage. The situation can be avoided.
　また本発明の第４の特徴によれば、第１冷却通路および第２冷却通路を接続する第４冷却通路の入口部を第１冷却通路の上流側部分に設けたので、第１冷却通路の上流側部分を流れる冷却空気を阻止部材で阻止して入口部から第４冷却通路に積極的に供給することができる。 According to the fourth aspect of the present invention, the inlet portion of the fourth cooling passage connecting the first cooling passage and the second cooling passage is provided in the upstream portion of the first cooling passage. The cooling air flowing in the upstream portion can be blocked by the blocking member and can be positively supplied from the inlet portion to the fourth cooling passage.
図１は電気自動車の側面図である。（第１の実施の形態）FIG. 1 is a side view of an electric vehicle. (First embodiment) 図２はバッテリパックの斜視図である。（第１の実施の形態）FIG. 2 is a perspective view of the battery pack. (First embodiment) 図３はバッテリトレーの分解斜視図である。（第１の実施の形態）FIG. 3 is an exploded perspective view of the battery tray. (First embodiment) 図４はバッテリトレー内の冷却空気の通路を示す図である。（第１の実施の形態）FIG. 4 is a view showing a cooling air passage in the battery tray. (First embodiment) 図５は図２の５－５線断面図である。（第１の実施の形態）5 is a cross-sectional view taken along line 5-5 of FIG. (First embodiment) 図６は図２の６－６線断面図である。（第１の実施の形態）6 is a cross-sectional view taken along line 6-6 of FIG. (First embodiment) 図７は図３の７－７線断面図である。（第１の実施の形態）7 is a cross-sectional view taken along line 7-7 of FIG. (First embodiment) 図８は図３の８－８線断面図である。（第１の実施の形態）8 is a cross-sectional view taken along line 8-8 of FIG. (First embodiment) 図９は図４の９方向矢視図である。（第１の実施の形態）9 is a view taken in the direction of arrow 9 in FIG. (First embodiment)
２８ａ　　　入口部
３８　　　　バッテリトレー
４２　　　　バッテリモジュール（バッテリ）
４５ｃ　　　第３通路形成部材（阻止部材）
４８ａ　　　冷却空気吸入口
４９ａ　　　冷却空気排出口
Ｐ１　　　　第１冷却通路
Ｐ２　　　　第２冷却通路
Ｐ３　　　　第３冷却通路
Ｐ４　　　　第４冷却通路
ａ　　　　　第１通路
ｂ　　　　　第２通路（下流側部分）
ｃ　　　　　第３通路（上流側部分） 28a Inlet part 38 Battery tray 42 Battery module (battery)
45c Third passage forming member (blocking member)
48a Cooling air inlet 49a Cooling air outlet P1 First cooling passage P2 Second cooling passage P3 Third cooling passage P4 Fourth cooling passage a First passage b Second passage (downstream portion)
c Third passage (upstream part)
　以下、図１～図９に基づいて本発明の実施の形態を説明する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS.
第１の実施の形態First embodiment
　図１および図２に示すように、電気自動車の車体フレーム１１は、車体前後方向に延びる左右一対のフロアフレーム１２，１２と、フロアフレーム１２，１２の前端から上方に屈曲しながら前方に延びる左右一対のフロントサイドフレーム１３，１３と、フロアフレーム１２，１２の後端から上方に屈曲しながら後方に延びる左右一対のリヤサイドフレーム１４，１４と、フロアフレーム１２，１２の車幅方向外側に配置された左右一対のサイドシル１５，１５と、サイドシル１５，１５の前端をフロアフレーム１２，１２の前端に接続する左右一対のフロントアウトリガー１６，１６と、サイドシル１５，１５の後端をフロアフレーム１２，１２の後端に接続する左右一対のリヤアウトリガー１７，１７と、左右一対のフロントサイドフレーム１３，１３の前端部間を車幅方向に接続するフロントバンパービーム１８と、左右一対のフロアフレーム１２，１２の前端部間を車幅方向に接続するフロントクロスメンバ１９と、左右一対のフロアフレーム１２，１２の前後方向中間部間を車幅方向に接続するミドルクロスメンバ２０と、左右一対のリヤサイドフレーム１４，１４の前後方向中間部間を車幅方向に接続するリヤクロスメンバ２１と、左右一対のリヤサイドフレーム１４，１４の後端部間を車幅方向に接続するリヤバンパービーム２２とを備える。 As shown in FIGS. 1 and 2, a body frame 11 of an electric vehicle includes a pair of left and right floor frames 12 and 12 extending in the longitudinal direction of the vehicle body, and left and right extending forward while bending upward from the front ends of the floor frames 12 and 12. A pair of front side frames 13, 13, a pair of left and right rear side frames 14, 14 that extend rearward while bending upward from the rear ends of the floor frames 12, 12, and the floor frames 12, 12 are disposed on the outside in the vehicle width direction. A pair of left and right side sills 15, 15, a pair of left and right front outriggers 16, 16 that connect the front ends of the side sills 15, 15 to the front ends of the floor frames 12, 12, and the rear ends of the side sills 15, 15 are the floor frames 12, 12. A pair of left and right rear outriggers 17 and 17 connected to the rear end, and a pair of left and right front side A front bumper beam 18 connecting the front ends of the frames 13, 13 in the vehicle width direction, a front cross member 19 connecting the front ends of the pair of left and right floor frames 12, 12 in the vehicle width direction, and a pair of left and right floors A middle cross member 20 for connecting the front and rear intermediate portions of the frames 12 and 12 in the vehicle width direction, and a rear cross member 21 for connecting the front and rear middle portions of the pair of left and right rear side frames 14 and 14 in the vehicle width direction; A rear bumper beam 22 that connects the rear end portions of the pair of left and right rear side frames 14, 14 in the vehicle width direction is provided.
　電気自動車の走行用駆動源であるモータ・ジェネレータ２３の電源となるバッテリパック３１は車体フレーム１１の下面側から吊り下げ支持される。即ち、バッテリパック３１の下面には車幅方向に延びるフロント吊り下げビーム３２、ミドル吊り下げビーム３３およびリヤ吊り下げビーム３４が固定されており、フロント吊り下げビーム３２の両端が左右一対のフロアフレーム１２，１２の前部に固定され、ミドル吊り下げビーム３３の両端が左右一対のフロアフレーム１２，１２の後部に固定され、リヤ吊り下げビーム３４の両端が左右一対のリヤサイドフレーム１４，１４の前部から垂下する支持部材３５，３５の下端に固定される。またバッテリパック３１の前端の車幅方向中央部が前部ブラケット３６を介してフロントクロスメンバ１９に支持されるとともに、バッテリパック３１の後端の車幅方向中央部が後部ブラケット３７を介してリヤクロスメンバ２１に支持される。更に、バッテリパック３１は、フロント吊り下げビーム３２およびミドル吊り下げビーム３３の中間位置において、ミドルクロスメンバ２０の下面に支持される。 A battery pack 31 serving as a power source of a motor / generator 23 that is a driving source for driving an electric vehicle is supported by being suspended from the lower surface side of the vehicle body frame 11. That is, a front suspension beam 32, a middle suspension beam 33 and a rear suspension beam 34 extending in the vehicle width direction are fixed to the lower surface of the battery pack 31, and both ends of the front suspension beam 32 are a pair of left and right floor frames. 12, both ends of the middle suspension beam 33 are fixed to the rear part of the pair of left and right floor frames 12, 12, and both ends of the rear suspension beam 34 are in front of the pair of left and right rear side frames 14, 14. It fixes to the lower end of the supporting members 35 and 35 which hang down from a part. Further, the vehicle width direction center portion of the front end of the battery pack 31 is supported by the front cross member 19 via the front bracket 36, and the vehicle width direction center portion of the rear end of the battery pack 31 is supported via the rear bracket 37. Supported by the cross member 21. Further, the battery pack 31 is supported on the lower surface of the middle cross member 20 at an intermediate position between the front hanging beam 32 and the middle hanging beam 33.
　バッテリパック３１を車体フレーム１１に支持した状態で、バッテリパック３１の上面は、車室２５の下部にフロアパネル２６を介して対向する。即ち、本実施の形態のバッテリパック３１は、車室２５の外部に配置される。 In a state where the battery pack 31 is supported on the vehicle body frame 11, the upper surface of the battery pack 31 faces the lower part of the passenger compartment 25 through the floor panel 26. That is, the battery pack 31 of the present embodiment is disposed outside the vehicle compartment 25.
　バッテリパック３１は、金属製のバッテリトレー３８と、バッテリトレー３８に上方から重ね合わされた合成樹脂製のバッテリカバー３９とを備える。バッテリトレー３８の周縁部とバッテリカバー３９の周縁部とは、シール部材４０（図２参照）を挟んで多数のボルト４１…で締結されており、従ってバッテリパック３１の内部は基本的に密閉された空間となる。バッテリトレー３８の上面には、複数のバッテリセルを直列に積層したバッテリモジュール４２…が複数個搭載される。バッテリトレー３８およびバッテリカバー３９は、本発明のバッテリケース２４を構成する。 The battery pack 31 includes a battery tray 38 made of metal and a battery cover 39 made of synthetic resin that is superimposed on the battery tray 38 from above. The peripheral portion of the battery tray 38 and the peripheral portion of the battery cover 39 are fastened by a large number of bolts 41 with the seal member 40 (see FIG. 2) interposed therebetween, so that the interior of the battery pack 31 is basically sealed. Space. On the upper surface of the battery tray 38, a plurality of battery modules 42 are stacked in which a plurality of battery cells are stacked in series. The battery tray 38 and the battery cover 39 constitute the battery case 24 of the present invention.
　図３～図６に示すように、バッテリトレー３８は、アッパープレート４３とロアプレート４４とを複数の通路形成部材４５ａ～４５ｉを挟んで結合したもので、それらの間に冷却空気が流れる冷却通路が形成されており、アッパープレート４３の上面に接触するバッテリモジュール４２…との間で熱交換を行い、充放電により発熱するバッテリモジュール４２…を冷却する。またバッテリトレー３８の後部には左右一対の脚部２８，２９によってバッテリ支持部材２７が一段高い位置に支持されており、その上面に２個のバッテリモジュール４２，４２が支持される。バッテリ支持部材２７の内部には冷却通路が形成される。 As shown in FIGS. 3 to 6, the battery tray 38 is formed by joining an upper plate 43 and a lower plate 44 with a plurality of passage forming members 45a to 45i interposed therebetween, and a cooling passage through which cooling air flows. Is formed, heat exchange is performed with the battery modules 42 contacting the upper surface of the upper plate 43, and the battery modules 42 that generate heat by charging and discharging are cooled. Further, a battery support member 27 is supported at a position higher by a pair of left and right legs 28 and 29 at the rear portion of the battery tray 38, and two battery modules 42 and 42 are supported on the upper surface thereof. A cooling passage is formed inside the battery support member 27.
　バッテリパック３１の後部に設けられた冷却装置４６は、車幅方向中央部に配置された吸入ダクト４８と、吸入ダクト４８の車幅方向両側に配置された左右一対の排出ダクト４９，４９とを備える。吸入ダクト４８の下端はバッテリトレー３８の冷却通路の上流端に接続され、左右の排出ダクト４９，４９の下端はバッテリトレー３８の冷却通路の下流端に接続される。内部に上流側吸入通路５４および下流側吸入通路５５が形成された吸入ダクト４８の上部前面には、その内部にバッテリパック３１の外部の空気を冷却空気として吸入するための冷却空気吸入口４８ａが前向きに開口する。また排出ダクト４９，４９は、バッテリトレー３８の左右の冷却通路の下流端から上向きに立ち上がる上流側排出通路５６，５６と、上流側排出通路５６，５６の上端から車幅方向内側に連なる下流側排出通路５７，５７とを備えており、下流側排出通路５７，５７の直下に冷却ファン４７，４７が配置される。冷却ファン４７，４７の外周を渦巻き形のファンケーシング５８，５８が取り囲んでおり、その外端に冷却空気排出口４９ａ，４９ａが開口する。 The cooling device 46 provided at the rear portion of the battery pack 31 includes a suction duct 48 disposed at the center in the vehicle width direction and a pair of left and right discharge ducts 49, 49 disposed on both sides of the suction duct 48 in the vehicle width direction. Prepare. The lower end of the suction duct 48 is connected to the upstream end of the cooling passage of the battery tray 38, and the lower ends of the left and right discharge ducts 49, 49 are connected to the downstream end of the cooling passage of the battery tray 38. A cooling air suction port 48a for sucking air outside the battery pack 31 as cooling air is provided in the upper front surface of the suction duct 48 in which the upstream suction passage 54 and the downstream suction passage 55 are formed. Open forward. Further, the discharge ducts 49, 49 are upstream discharge passages 56, 56 that rise upward from the downstream ends of the left and right cooling passages of the battery tray 38, and downstream sides that are continuous from the upper ends of the upstream discharge passages 56, 56 to the inside in the vehicle width direction. Discharge passages 57 and 57 are provided, and cooling fans 47 and 47 are disposed immediately below the downstream discharge passages 57 and 57. The outer periphery of the cooling fans 47, 47 is surrounded by spiral fan casings 58, 58, and cooling air discharge ports 49a, 49a are opened at the outer ends thereof.
　従って、冷却ファン４７，４７を駆動すると、吸入ダクト４８の冷却空気吸入口４８ａから吸入された冷却空気はバッテリトレー３８の内部に供給され、バッテリトレー３８の内部の冷却通路を流れる間にバッテリモジュール４２…との間で熱交換を行った後、排出ダクト４９，４９の冷却ファン４７，４７を通過して冷却空気排出口４９ａ，４９ａから排出される。前記冷却空気の一部はバッテリ支持部材２７の内部の冷却通路を流れ、その上面に支持した前記２個のバッテリモジュール４２，４２を冷却する。 Accordingly, when the cooling fans 47 and 47 are driven, the cooling air sucked from the cooling air suction port 48a of the suction duct 48 is supplied to the inside of the battery tray 38, and flows through the cooling passage inside the battery tray 38. After exchanging heat with 42..., The air passes through the cooling fans 47 and 47 of the discharge ducts 49 and 49 and is discharged from the cooling air discharge ports 49a and 49a. Part of the cooling air flows through the cooling passage inside the battery support member 27 and cools the two battery modules 42 and 42 supported on the upper surface thereof.
　次に、バッテリトレー３８の冷却通路の構造を、図７～図９に基づいて説明する。 Next, the structure of the cooling passage of the battery tray 38 will be described with reference to FIGS.
　図９は通路形成部材４５ａ～４５ｉが固定されたロアプレート４４を上から見た図であり、バッテリパック３１の冷却通路は、ロアプレート４４の車幅方向中央部を前後方向に延びる第１冷却通路Ｐ１と、ロアプレート４４車幅方向両端部を前後方向に延びる左右一対の第２冷却通路Ｐ２，Ｐ２と、第１冷却通路Ｐ１および第２冷却通路Ｐ２，Ｐ２に挟まれて車幅方向に延びる複数の第３冷却通路Ｐ３…と、ロアプレート４４の後部に車幅方向に形成された第４冷却通路Ｐ４（図３参照）とで構成される。 FIG. 9 is a top view of the lower plate 44 to which the passage forming members 45a to 45i are fixed. The cooling passage of the battery pack 31 is a first cooling that extends in the vehicle width direction central portion of the lower plate 44 in the front-rear direction. Passing between the passage P1, the pair of left and right second cooling passages P2 and P2 extending in the front-rear direction at both ends in the vehicle width direction of the lower plate 44, and the first cooling passage P1 and the second cooling passages P2 and P2 The plurality of third cooling passages P3... Extending, and a fourth cooling passage P4 (see FIG. 3) formed in the rear portion of the lower plate 44 in the vehicle width direction.
　第１冷却通路Ｐ１は、波板よりなる第１通路形成部材４５ａと、その前部および左右両側部を囲む第２通路形成部材４５ｂ…とで構成されるもので、吸入ダクト４８の下端の出口部４８ｂが第１通路形成部材４５ａの後端に臨んでいる。第１通路形成部材４５ａの内部には出口部４８ｂから前方に延びる３本の平行な第１通路ａ…が形成される。第１通路ａ…の下流端は左右にＵターンし、第１通路形成部材４５ａの前半部および第２通路形成部材４５ｂ，４５ｂの間を後方に延びる左右の第２通路ｂ，ｂに接続される。また第１通路形成部材４５ａの後半部および第２通路形成部材４５ｂ，４５ｂの間を前方に延びる左右の第３通路ｃ，ｃが形成される。第２通路ｂ，ｂおよび第３通路ｃ，ｃは同一直線上に配置され、両者の突き当たり部は車幅方向に延びる第３通路形成部材４５ｃ，４５ｃによって遮断されている。 The first cooling passage P1 is composed of a first passage forming member 45a made of corrugated plate, and second passage forming members 45b surrounding the front portion and the left and right side portions, and is an outlet at the lower end of the suction duct 48. The part 48b faces the rear end of the first passage forming member 45a. Three parallel first passages a extending forward from the outlet portion 48b are formed in the first passage forming member 45a. The downstream end of the first passage a is U-turned to the left and right, and is connected to the left and right second passages b and b extending rearward between the front half of the first passage forming member 45a and the second passage forming members 45b and 45b. The Further, left and right third passages c, c extending forward between the second half of the first passage forming member 45a and the second passage forming members 45b, 45b are formed. The second passages b and b and the third passages c and c are arranged on the same straight line, and the abutting portions of both are blocked by third passage forming members 45c and 45c extending in the vehicle width direction.
　第３冷却通路Ｐ３…は１２枚の波板よりなる第４通路形成部材４５ｄ…により構成されるもので、それらの内部に車幅方向内側から外側に延びる多数の第４通路ｄ…が形成される。第２、第３通路ｂ，ｂ；ｃ，ｃと第４通路ｄ…とは、左右の第２通路形成部材４５ｂ…に形成した連通孔ｐ…（図８参照）によって連通する。 The third cooling passages P3 are constituted by fourth passage forming members 45d made of twelve corrugated plates, and a plurality of fourth passages d extending from the inner side to the outer side in the vehicle width direction are formed therein. The The second and third passages b, b; c, c and the fourth passages d are communicated by communication holes p (see FIG. 8) formed in the left and right second passage forming members 45b.
　左右の第２冷却通路Ｐ２，Ｐ２は実質的に左右対称に形成されており、第３通路形成部材４５ｃ，４５ｃの前方に位置する４枚の第４通路形成部材４５ｄ…の車幅方向外端には、前後方向に延びる左右の第５通路形成部材４５ｅ，４５ｅが配置され、第４通路形成部材４５ｄ…および第５通路形成部材４５ｅ，４５ｅの間に前後方向に延びる左右の第５通路ｅ，ｅが形成される。 The left and right second cooling passages P2, P2 are formed substantially symmetrically, and the outer ends in the vehicle width direction of the four fourth passage formation members 45d, which are located in front of the third passage formation members 45c, 45c. The left and right fifth passage forming members 45e, 45e extending in the front-rear direction are arranged, and the left and right fifth passages e extending in the front-rear direction between the fourth passage forming member 45d... And the fifth passage forming members 45e, 45e. , E are formed.
　第３通路形成部材４５ｃ，４５ｃの後方に位置する４枚の第４通路形成部材４５ｄ…の車幅方向外端には、前後方向に延びる左右の第６通路形成部材４５ｆ，４５ｆが配置され、第４通路形成部材４５ｄ…および第６通路形成部材４５ｆ，４５ｆの間に前後方向に延びる左右の第８通路ｈ，ｈが形成されるとともに、第６通路形成部材４５ｆ，４５ｆの車幅方向外側に前後方向に延びる左右の第６通路ｆ，ｆが形成される。第５通路ｅ，ｅの下流端と第６通路ｆ，ｆの上流端とは、第７通路形成部材４５ｇ，４５ｇによって接続される。 Left and right sixth passage forming members 45f, 45f extending in the front-rear direction are disposed at the outer ends in the vehicle width direction of the four fourth passage forming members 45d ... located behind the third passage forming members 45c, 45c, Left and right eighth passages h, h extending in the front-rear direction are formed between the fourth passage formation member 45d... And the sixth passage formation members 45f, 45f, and the sixth passage formation members 45f, 45f are outside in the vehicle width direction. Left and right sixth passages f, f extending in the front-rear direction are formed. The downstream end of the fifth passages e, e and the upstream end of the sixth passages f, f are connected by seventh passage forming members 45g, 45g.
　最も後方に位置する４枚の第４通路形成部材４５ｄ…の車幅方向外端には、前後方向に延びる左右の第８通路形成部材４５ｈ，４５ｈが配置され、第４通路形成部材４５ｄ…および第８通路形成部材４５ｈ，４５ｈの間に前後方向に延びる左右の第９通路ｉ，ｉが形成されるとともに、第８通路形成部材４５ｈ，４５ｈの車幅方向外側に前後方向に延びる左右の第７通路ｇ，ｇが形成される。第６通路ｆ，ｆおよび第８通路ｈ，ｈの下流端は第７通路ｇ，ｇの上流端に接続される。第７通路ｇ，ｇおよび第９通路ｉ，ｉの下流端が、一対の入口部４９ｂ，４９ｂを介して左右の排出ダクト４９，４９に接続される。 The left and right eighth passage forming members 45h, 45h extending in the front-rear direction are disposed at the outer ends in the vehicle width direction of the four fourth passage forming members 45d located at the rearmost positions, and the fourth passage forming members 45d,. Left and right ninth passages i, i extending in the front-rear direction are formed between the eighth passage forming members 45h, 45h, and left and right second passages extending in the front-rear direction outward of the eighth passage forming members 45h, 45h in the vehicle width direction. Seven passages g and g are formed. The downstream ends of the sixth passages f, f and the eighth passages h, h are connected to the upstream ends of the seventh passages g, g. The downstream ends of the seventh passages g, g and the ninth passages i, i are connected to the left and right discharge ducts 49, 49 via a pair of inlet portions 49b, 49b.
　左側の後から２枚目および３枚目の第３通路形成部材４５ｃ，４５ｃの間に車幅方向内側から外側に延びる第１０通路ｊが形成される。第１０通路ｊの上流端は、第２通路形成部材４５ｂに形成した連通孔ｑ（図８参照）を介して左側の第３通路ｃに連通する。第９通路形成部材４５ｉによって遮られた第１０通路ｊの下流端が、左側の脚部２８の下端の入口部２８ａに接続される。また右側の第６、第８通路ｆ，ｈおよび第７通路ｇの間に、右側の脚部２９の下端の出口部２９ａが接続される。 A tenth passage j extending from the inner side to the outer side in the vehicle width direction is formed between the second and third third passage forming members 45c, 45c from the rear on the left side. The upstream end of the tenth passage j communicates with the left third passage c through a communication hole q (see FIG. 8) formed in the second passage forming member 45b. The downstream end of the tenth passage j blocked by the ninth passage forming member 45 i is connected to the inlet portion 28 a at the lower end of the left leg portion 28. An outlet 29a at the lower end of the right leg 29 is connected between the sixth and eighth passages f and h on the right side and the seventh passage g.
　次に、上記構成を備えた本発明の実施の形態の作用を説明する。 Next, the operation of the embodiment of the present invention having the above configuration will be described.
　バッテリパック３１のバッテリケース２４内に収納したバッテリモジュール４２…は充放電により発熱するため、冷却装置４６によりバッテリトレー３８の内部に供給される冷却空気で冷却される。即ち、冷却ファン４７，４７を駆動すると、バッテリケース２４の上面およびフロアパネル２６の下面間の空気が冷却空気として吸入ダクト４８の冷却空気吸入口４８ａから吸入され、吸入ダクト４８の上流側吸入通路５４および下流側吸入通路５５を経てバッテリトレー３８の内部に供給される（図５参照）。 Since the battery modules 42 accommodated in the battery case 24 of the battery pack 31 generate heat due to charging / discharging, they are cooled by the cooling air supplied to the inside of the battery tray 38 by the cooling device 46. That is, when the cooling fans 47 are driven, air between the upper surface of the battery case 24 and the lower surface of the floor panel 26 is sucked as cooling air from the cooling air inlet 48a of the suction duct 48, and the upstream suction passage of the suction duct 48. 54 and the downstream suction passage 55 to be supplied into the battery tray 38 (see FIG. 5).
　図９に示すように、吸入ダクト４８の下端の入口部４８ｂから、第１通路形成部材４５ａによって形成された３本の第１通路ａ…と、第１通路形成部材４５ａおよび第２通路形成部材４５ｂ，４５ｂによって形成された左右の第３通路ｃ，ｃとに冷却空気が流入する。３本の第１通路ａ…を前方に流れた冷却空気は突き当たりで左右にＵターンし、第１通路形成部材４５ａおよび第２通路形成部材４５ｂ，４５ｂによって形成された左右の第２通路ｂ，ｂを後方に流れて第３通路形成部材４５ｃ，４５ｃに突き当たる。その間に、冷却空気は、第２通路形成部材４５ｂ，４５ｂに形成した連通孔ｐ…（図８参照）から４枚の第４通路形成部材４５ｄ…によって形成された第４通路ｄ…を車幅方向外側に流れた後、４枚の第４通路形成部材４５ｄ…および左右の第５通路形成部材４５ｅ，４５ｅによって形成された左右の第５通路ｅ，ｅを後方に流れ、更に第７通路形成部材４５ｇ，４５ｇで車幅方向外側に偏向して第６通路形成部材４５ｆ，４５ｆの車幅方向外側の第６通路ｆ，ｆと、第８通路形成部材４５ｈ，４５ｈの車幅方向外側の第７通路ｇ，ｇとを後方に流れ、入口部４９ｂ，４９ｂから排出ダクト４９，４９に排出される。 As shown in FIG. 9, from the inlet 48b at the lower end of the suction duct 48, three first passages a formed by the first passage forming member 45a, the first passage forming member 45a and the second passage forming member. Cooling air flows into the left and right third passages c, c formed by 45b, 45b. The cooling air that has flowed forward through the three first passages a is U-turned to the left and right at the end, and the left and right second passages b formed by the first passage formation member 45a and the second passage formation members 45b and 45b, b flows backward and hits the third passage forming members 45c and 45c. Meanwhile, the cooling air passes through the fourth passage d formed by the four fourth passage forming members 45d through the communication holes p formed in the second passage forming members 45b and 45b (see FIG. 8). After flowing outward in the direction, the left and right fifth passages e and e formed by the four fourth passage forming members 45d... And the left and right fifth passage forming members 45e and 45e flow backward, and further the seventh passage is formed. The sixth passages f and f outside the sixth passage forming members 45f and 45f in the vehicle width direction and the eighth passage forming members 45h and 45h outside the vehicle width direction are deflected by the members 45g and 45g toward the outside in the vehicle width direction. 7 flows backward through the passages g and g, and is discharged from the inlet portions 49b and 49b to the discharge ducts 49 and 49.
　第１通路形成部材４５ａおよび第２通路形成部材４５ｂ，４５ｂによって形成された左右の第３通路ｃ，ｃを前方に流れる冷却空気は第３通路形成部材４５ｃ，４５ｃに突き当たり、その一部は第２通路形成部材４５ｂ，４５ｂに形成した連通孔ｐ…（図８参照）から第３通路形成部材４５ｃ，４５ｃの後方の４枚の第４通路形成部材４５ｄ…によって形成された第４通路ｄ…を車幅方向外側に流れた後、４枚の第４通路形成部材４５ｄ…および左右の第６通路形成部材４５ｆ，４５ｆによって形成された左右の第８通路ｈ，ｈを後方に流れ、更に前記第８通路形成部材４５ｈ，４５ｈの車幅方向外側の第７通路ｇ，ｇを介して入口部４９ｂ，４９ｂから排出ダクト４９，４９に排出される。左右の第３通路ｃ，ｃを前方に流れる冷却空気の他の一部は、第２通路形成部材４５ｂ，４５ｂに形成した連通孔ｐ…から最も後方の４枚の第４通路形成部材４５ｄ…によって形成された第４通路ｄ…を車幅方向外側に流れた後、４枚の第４通路形成部材４５ｄ…および左右の第８通路形成部材４５ｈ，４５ｈによって形成された左右の第９通路ｉ，ｉを後方に流れ、入口部４９ｂ，４９ｂから排出ダクト４９，４９に排出される。 The cooling air flowing forward in the left and right third passages c, c formed by the first passage formation member 45a and the second passage formation members 45b, 45b hits the third passage formation members 45c, 45c, and a part thereof is the first The fourth passage d formed by the four fourth passage formation members 45d ... behind the third passage formation members 45c, 45c from the communication holes p ... (see Fig. 8) formed in the two passage formation members 45b, 45b. And the left and right eighth passages h and h formed by the four fourth passage forming members 45d... And the left and right sixth passage forming members 45f and 45f. The eighth passage forming members 45h and 45h are discharged from the inlet portions 49b and 49b to the discharge ducts 49 and 49 via the seventh passages g and g outside the vehicle width direction. Other part of the cooling air flowing forward in the left and right third passages c, c is the four fourth passage formation members 45d at the rearmost from the communication holes p ... formed in the second passage formation members 45b, 45b. The left and right ninth passages i formed by the four fourth passage forming members 45d and the left and right eighth passage forming members 45h, 45h are allowed to flow through the fourth passage d formed by the , I flows rearward and is discharged from the inlet portions 49b, 49b to the discharge ducts 49, 49.
　左側の第３通路ｃを前方に流れる冷却空気の他の一部は、第２通路形成部材４５ｂに形成した連通孔ｑ（図８参照）から第１０通路ｊに流入し、そこから入口部２８ａおよび左側の脚部２８を経てバッテリ支持部材２７の内部の第１０通路ｊを左から右に流れ、右側の脚部２９および出口部２９ａを経て右側の第７通路ｇに流入する。 The other part of the cooling air flowing forward through the left third passage c flows into the tenth passage j from the communication hole q (see FIG. 8) formed in the second passage forming member 45b, and from there into the inlet portion 28a. Then, it flows from the left to the right through the tenth passage j inside the battery support member 27 through the left leg portion 28, and flows into the right seventh passage g through the right leg portion 29 and the outlet portion 29a.
　以上のように、冷却空気がバッテリトレー３８の内部に形成された第１通路ａ～第１０通路ｊを流れる間に、それらの上面に支持したバッテリモジュール４２…を冷却することができる。 As described above, while the cooling air flows through the first passage a to the tenth passage j formed in the battery tray 38, the battery modules 42 supported on the upper surfaces thereof can be cooled.
　ところで、バッテリトレー３８の中央部では周囲の全周がバッテリモジュール４２…によって囲まれるため、熱が逃げ難くなって温度が比較的に高温になる。一方、バッテリトレー３８の外周部では周囲の半周だけがバッテリモジュール４２…によって囲まれるため、熱がバッテリトレー３８の外部に逃げ易くなって温度が比較的に低温になる。従って、複数のバッテリモジュール４２…の温度を均一化して耐久性を高めるには、バッテリトレー３８の中央部の冷却効率を外周部の冷却効率よりも高く設定する必要がある。 Incidentally, since the entire periphery of the battery tray 38 is surrounded by the battery modules 42 at the center of the battery tray 38, it is difficult for heat to escape and the temperature becomes relatively high. On the other hand, in the outer periphery of the battery tray 38, only the surrounding half circumference is surrounded by the battery modules 42, so that heat easily escapes to the outside of the battery tray 38, and the temperature becomes relatively low. Therefore, in order to make the temperature of the plurality of battery modules 42... Uniform and enhance the durability, it is necessary to set the cooling efficiency of the central portion of the battery tray 38 higher than the cooling efficiency of the outer peripheral portion.
　本実施の形態によれば、バッテリトレー３８の車幅方向中央部に配置した第１冷却通路Ｐ１には熱交換前の比較的に低温の冷却空気が流れ、バッテリトレー３８の車幅方向両端部に配置した左右の第２冷却通路Ｐ２，Ｐ２には熱交換後の比較的に高温の冷却空気が流れ、しかも中央の第１冷却通路Ｐ１を流れる冷却空気の流量は、左右各々の第２冷却通路Ｐ２，Ｐ２を流れる冷却空気の流量の２倍であるため、バッテリトレー３８の中央部および外周部の前記温度差を補償して全てのバッテリモジュール４２…均一に冷却し、それらの温度差を減少させることができる。 According to the present embodiment, relatively low-temperature cooling air before heat exchange flows through the first cooling passage P1 disposed in the vehicle width direction central portion of the battery tray 38, and both end portions of the battery tray 38 in the vehicle width direction. In the left and right second cooling passages P2 and P2 arranged in the left and right, the relatively high-temperature cooling air after heat exchange flows, and the flow rate of the cooling air flowing through the central first cooling passage P1 is the right and left second cooling passages. Since the flow rate of the cooling air flowing through the passages P2 and P2 is twice, the temperature difference between the central portion and the outer peripheral portion of the battery tray 38 is compensated to cool all the battery modules 42 uniformly, and the temperature difference between them Can be reduced.
　また第１冷却通路Ｐ１は、冷却空気が前向きに流れる上流側の第１通路ａ…と、冷却空気が後向きに流れる下流側の第２通路ｂ，ｂとが相互に隣接しているので、上流側の第１通路ａ…を流れる比較的に低温の冷却空気と、下流側の第２通路ｂ，ｂを流れる比較的に高温の冷却空気とが熱交換することで、第１通路ａ…および第２通路ｂ，ｂを流れる冷却空気の温度を均一化してバッテリモジュール４２…を均一に冷却することができる。 Further, the first cooling passage P1 has upstream first passages a through which the cooling air flows forward and downstream second passages b and b through which the cooling air flows backward. The relatively low-temperature cooling air flowing through the first passages a on the side and the relatively high-temperature cooling air flowing through the second passages b, b on the downstream side exchange heat, so that the first passage a ... The temperature of the cooling air flowing through the second passages b and b can be made uniform to cool the battery modules 42.
　また仮に、第３通路ｃ，ｃおよび第３通路形成部材４５ｃ，４５ｃを廃止し、第２通路ｂ，ｂをバッテリトレー３８の後端部まで延長すると、その第２通路ｂ，ｂの延長部分は冷却空気吸入口４８ａから遠く離れるために冷却空気の流量が少なくなり、それに連なる第３冷却通路Ｐ３…に充分な量の冷却空気を供給できなくなる可能性がある。 Also, if the third passages c and c and the third passage forming members 45c and 45c are abolished and the second passages b and b are extended to the rear end portion of the battery tray 38, an extended portion of the second passages b and b. Is far away from the cooling air inlet 48a, the flow rate of the cooling air is reduced, and there is a possibility that a sufficient amount of cooling air cannot be supplied to the third cooling passages P3.
　しかしながら本実施の形態によれば、前記第２通路ｂ，ｂの延長部分の代わりに、冷却空気吸入口４８ａから直接供給された冷却空気が前向きに流れる第３通路ｃ，ｃを設け、第３通路ｃ，ｃおよび第２通路ｂ，ｂの相互に対向する下流端どうしを第３通路形成部材４５ｃ，４５ｃによって仕切ったので、第３通路ｃ，ｃおよび第２通路ｂ，ｂに連なる全ての第３冷却通路Ｐ３…に充分な量の冷却空気を均等に供給することができる。 However, according to the present embodiment, in place of the extended portions of the second passages b and b, the third passages c and c through which the cooling air directly supplied from the cooling air suction port 48a flows forward are provided. Since the downstream ends of the passages c and c and the second passages b and b facing each other are partitioned by the third passage forming members 45c and 45c, all the passages connected to the third passage c and c and the second passages b and b are all made. A sufficient amount of cooling air can be evenly supplied to the third cooling passages P3.
　またバッテリトレー３８から上方に離間した位置に設けた第４冷却通路Ｐ４は、流路抵抗が大きくなるために充分な量の冷却空気が供給され難くなるが、第３通路形成部材４５ｃによって行き止まりになった第３通路ｃから第４冷却通路Ｐ４に冷却空気を分岐させるので、充分な量の冷却空気を第４冷却通路に積極的に供給することができる。 The fourth cooling passage P4 provided at a position spaced upward from the battery tray 38 is difficult to be supplied with a sufficient amount of cooling air because the flow passage resistance is increased, but is stopped by the third passage forming member 45c. Since the cooling air is branched from the third passage c to the fourth cooling passage P4, a sufficient amount of cooling air can be positively supplied to the fourth cooling passage.
　以上、本発明の実施の形態を説明したが、本発明はその要旨を逸脱しない範囲で種々の設計変更を行うことが可能である。 Although the embodiments of the present invention have been described above, various design changes can be made without departing from the scope of the present invention.
　例えば、実施の形態では冷却空気吸入口４８ａおよび冷却空気排出口４９ａをバッテリトレー３８の後端部に設けているが、それらをバッテリトレー３８の前端部や左右一方の側部に設けても良い。 For example, in the embodiment, the cooling air suction port 48a and the cooling air discharge port 49a are provided at the rear end portion of the battery tray 38, but they may be provided at the front end portion or one of the left and right side portions of the battery tray 38. .

Claims (4)

  1. 　冷却空気吸入口（４８ａ）および冷却空気排出口（４９ａ）に接続された冷却通路を有するバッテリトレー（３８）に複数のバッテリ（４２）を載置し、前記冷却通路を流れる冷却空気で前記バッテリ（４２）を冷却する電動車両用バッテリパックであって、
    　前記冷却通路は、上流端が前記冷却空気吸入口（４８ａ）に接続される第１冷却通路（Ｐ１）と、前記第１冷却通路（Ｐ１）の両側に配置されて下流端が前記冷却空気排出口（４９ａ）に接続される二つの第２冷却通路（Ｐ２）と、前記第１冷却通路（Ｐ１）および前記二つの第２冷却通路（Ｐ２）を接続する第３冷却通路（Ｐ３）とを備えることを特徴とする電動車両用バッテリパック。     A plurality of batteries (42) are placed on a battery tray (38) having a cooling passage connected to a cooling air inlet (48a) and a cooling air outlet (49a), and the battery is cooled by the cooling air flowing through the cooling passage. An electric vehicle battery pack for cooling (42),
    The cooling passage is disposed on both sides of the first cooling passage (P1) whose upstream end is connected to the cooling air suction port (48a) and the first cooling passage (P1), and the downstream end is the cooling air exhaust. Two second cooling passages (P2) connected to the outlet (49a), and a third cooling passage (P3) connecting the first cooling passage (P1) and the two second cooling passages (P2). A battery pack for an electric vehicle, comprising:
  2. 　前記第１冷却通路（Ｐ１）は、第１の方向に冷却空気が流れる第１通路（ａ）と、前記第１通路（ａ）の下流側に接続されて前記第１の方向とは逆の第２の方向に冷却空気が流れる第２通路（ｂ）とを備え、前記第１通路（ａ）および前記第２通路（ｂ）は相互に隣接することを特徴とする、請求項１に記載の電動車両用バッテリパック。 The first cooling passage (P1) is connected to the first passage (a) through which cooling air flows in a first direction and the downstream side of the first passage (a) and is opposite to the first direction. The second passage (b) through which cooling air flows in a second direction, wherein the first passage (a) and the second passage (b) are adjacent to each other. Battery pack for electric vehicles.
  3. 　前記第１冷却通路（Ｐ１）は、前記第３冷却通路（Ｐ３）の一部に接続される上流側部分（ｃ）と、前記第３冷却通路（Ｐ３）の他の一部に接続される下流側部分（ｂ）とを備え、前記上流側部分（ｃ）の下流端および前記下流側部分（ｂ）の下流端は冷却空気の流れを阻止する阻止部材（４５ｃ）を挟んで相互に付き当てられることを特徴とする、請求項１または請求項２に記載の電動車両用バッテリパック。 The first cooling passage (P1) is connected to an upstream portion (c) connected to a part of the third cooling passage (P3) and another part of the third cooling passage (P3). A downstream portion (b), and the downstream end of the upstream portion (c) and the downstream end of the downstream portion (b) are attached to each other with a blocking member (45c) blocking the flow of cooling air. The battery pack for an electric vehicle according to claim 1, wherein the battery pack is applied.
  4. 　前記第１冷却通路（Ｐ１）および前記第２冷却通路（Ｐ２）を接続する第４冷却通路（Ｐ４）を備え、前記第４冷却通路（Ｐ４）の入口部（２８ａ）は前記第１冷却通路（Ｐ１）の前記上流側部分（ｃ）に設けられることを特徴とする、請求項３に記載の電動車両用バッテリパック。 A fourth cooling passage (P4) connecting the first cooling passage (P1) and the second cooling passage (P2) is provided, and an inlet portion (28a) of the fourth cooling passage (P4) is the first cooling passage. The battery pack for an electric vehicle according to claim 3, wherein the battery pack is provided in the upstream portion (c) of (P1).
PCT/JP2012/081509 2011-12-09 2012-12-05 Battery pack for electric vehicle WO2013084939A1 (en)

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CN105377603A (en) * 2013-07-16 2016-03-02 奥迪股份公司 Receiving device for receiving at least one energy storage component
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