JP2012214077A - Cooling structure of battery for electric vehicle - Google Patents

Cooling structure of battery for electric vehicle Download PDF

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Publication number
JP2012214077A
JP2012214077A JP2011079432A JP2011079432A JP2012214077A JP 2012214077 A JP2012214077 A JP 2012214077A JP 2011079432 A JP2011079432 A JP 2011079432A JP 2011079432 A JP2011079432 A JP 2011079432A JP 2012214077 A JP2012214077 A JP 2012214077A
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Prior art keywords
battery
storage chamber
exhaust port
vehicle
air flow
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JP2011079432A
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Japanese (ja)
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Yoshihiro Ogura
良宏 小倉
Kuniaki Hasegawa
邦明 長谷川
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Kojima Industries Corp
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Kojima Press Industry Co Ltd
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Priority to JP2011079432A priority Critical patent/JP2012214077A/en
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    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Body Structure For Vehicles (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve a cooling performance of a battery by ventilating a space storing the battery, by using the dynamic pressure generated by the rolling stock run wind.SOLUTION: A battery storage chamber 10 that stores the battery 20 in a vehicle body floor is provided, an air intake 11 and an exhaust port 12 are provided at a front side and a rear side of the vehicle in the battery storage chamber, and a projection (second opening and closing damper 15) is provided in the part that crosses the air flow according to the vehicle running, and the exhaust port is opened in the downstream side of the projection. The ventilating performance of the battery storage chamber is improved since the negative pressure is generated in the exhaust port along with the vehicle running, and ventilation is promoted by the negative pressure, and the cooling performance of the battery can be improved.

Description

本発明は、車体床部に設けられたバッテリ収納室を換気して、そこに収納されたバッテリを冷却する電気自動車用バッテリの冷却構造に関する。   The present invention relates to a battery cooling structure for an electric vehicle that ventilates a battery storage chamber provided on a vehicle body floor and cools the battery stored therein.

電気自動車の走行エネルギーを供給するバッテリは車体床部に載置されている。かかるバッテリは充放電に伴って発熱するため冷却が必要である。そのため、バッテリは一つの空間内に収納され、この空間内を換気するようにしている（下記特許文献１参照）。   A battery for supplying running energy of the electric vehicle is placed on the vehicle body floor. Such a battery needs to be cooled because it generates heat as it is charged and discharged. For this reason, the battery is housed in one space, and the space is ventilated (see Patent Document 1 below).

特開平９−１８８１４４号公報Japanese Patent Laid-Open No. 9-188144

しかし、従来は換気性能が充分ではなかった。そのため、バッテリの冷却性能が充分ではなかった。
本発明は、このような問題に鑑み、車両の走行風によって発生する動圧を利用して、バッテリを収納した空間を換気することによりバッテリの冷却性能を改善することを課題とする。 However, the ventilation performance has not been sufficient in the past. Therefore, the cooling performance of the battery was not sufficient.
In view of such a problem, an object of the present invention is to improve the cooling performance of a battery by ventilating a space in which the battery is stored by using a dynamic pressure generated by a traveling wind of a vehicle.

本発明の第１発明は、車体床部にバッテリを収納するバッテリ収納室を設け、このバッテリ収納室の車両前方側に吸気口、後方側に排気口を設け、また車両走行に伴う空気流を横切る部位に凸部を設け、該凸部の下流側に前記排気口を開口したことを特徴とする電気自動車用バッテリの冷却構造である。
第１発明によれば、車両走行に伴う空気流を横切る部位に凸部を設け、その凸部の下流側にバッテリ収納室の排気口を開口したので、排気口には車両走行に伴って負圧が発生し、その負圧によって換気が促進されるため、バッテリ収納室の換気性能を向上し、バッテリの冷却性能を改善することができる。 In the first aspect of the present invention, a battery storage chamber for storing a battery is provided in a vehicle body floor, an intake port is provided on the vehicle front side of the battery storage chamber, an exhaust port is provided on the rear side, and an air flow associated with vehicle travel is provided. A cooling structure for a battery for an electric vehicle, characterized in that a projecting portion is provided at a crossing portion, and the exhaust port is opened downstream of the projecting portion.
According to the first aspect of the present invention, the convex portion is provided in the portion that crosses the air flow accompanying the vehicle travel, and the exhaust port of the battery storage chamber is opened downstream of the convex portion. Since pressure is generated and ventilation is promoted by the negative pressure, the ventilation performance of the battery storage chamber can be improved, and the cooling performance of the battery can be improved.

本発明の第２発明は、上記第１発明において、前記凸部は、前記空気流を横切る突出量を可変とされたことを特徴とする電気自動車用バッテリの冷却構造である。
第２発明によれば、空気流を横切る凸部の突出量を可変としたので、バッテリ収納室における換気の必要度合や車両走行に伴う空気流の速さに応じて突出量を変えてバッテリ収納室の換気量を調整することができる。 A second invention of the present invention is the battery cooling structure for an electric vehicle according to the first invention, wherein the protrusion has a variable projection amount across the air flow.
According to the second aspect of the present invention, since the protrusion amount of the convex portion that crosses the air flow is variable, the battery storage is performed by changing the protrusion amount according to the degree of ventilation required in the battery storage chamber and the speed of the air flow accompanying vehicle travel. The room ventilation can be adjusted.

本発明に係る電気自動車用バッテリの冷却構造の一実施形態を示す部分断面側面図である。It is a partial section side view showing one embodiment of the cooling structure of the battery for electric vehicles concerning the present invention. 上記実施形態の底面図である。It is a bottom view of the embodiment.

本発明の一実施形態を図面に基づいて説明する。
図１、２において、床部を成す骨格部材３５には、バッテリ２０が載置され、このバッテリ２０は、電気自動車の走行エネルギー源を成すものである。骨格部材３５上には、バッテリ２０を収納するように容器１３が被せられ、バッテリ収納室１０が形成されている。バッテリ収納室１０は一つの空間とされ、自動車の進行方向前方側には吸気口１１、後方側には排気口１２が設けられている。
また、吸気口１１には、吸気口１１全体を開閉するように第１の開閉ダンパ１４が設けられ、排気口１２には、第２の開閉ダンパ１５が設けられている。第１の開閉ダンパ１４及び第２の開閉ダンパ１５とも、骨格部材３５の前方端及び後方端にヒンジ中心が設けられ、いずれも自動車の走行に伴う空気流を横切る位置に突出可能としている。 An embodiment of the present invention will be described with reference to the drawings.
In FIGS. 1 and 2, a battery 20 is placed on a skeleton member 35 constituting a floor, and this battery 20 constitutes a travel energy source of an electric vehicle. On the skeleton member 35, the container 13 is covered so as to store the battery 20, and the battery storage chamber 10 is formed. The battery storage chamber 10 is a single space, and an intake port 11 is provided on the front side in the traveling direction of the automobile, and an exhaust port 12 is provided on the rear side.
The intake port 11 is provided with a first open / close damper 14 so as to open and close the entire intake port 11, and the exhaust port 12 is provided with a second open / close damper 15. Both the first opening / closing damper 14 and the second opening / closing damper 15 are provided with hinge centers at the front end and the rear end of the skeleton member 35, and both can project to a position crossing the air flow accompanying the traveling of the automobile.

第１の開閉ダンパ１４は、ヒンジを中心として回動することにより、吸気口１１を閉じる位置と、吸気口１１を開き、且つ空気流を横切る位置との間で動作される。
第１の開閉ダンパ１４により吸気口１１が閉じられたときは、排気口１２に設けられた第２の開閉ダンパ１５の位置に係らずバッテリ収納室１０には空気は流入しないが、第１の開閉ダンパ１４が開き、空気流を横切る位置となったときには、空気流が第１の開閉ダンパ１４に案内されて吸気口１１に流入し、バッテリ収納室１０には第１の開閉ダンパ１４の開度に応じた量の空気が取り込まれる。 The first opening / closing damper 14 is operated between a position for closing the air inlet 11 and a position for opening the air inlet 11 and crossing the air flow by rotating about the hinge.
When the air inlet 11 is closed by the first opening / closing damper 14, air does not flow into the battery storage chamber 10 regardless of the position of the second opening / closing damper 15 provided at the exhaust port 12. When the open / close damper 14 opens and reaches a position crossing the air flow, the air flow is guided to the first open / close damper 14 and flows into the intake port 11, and the battery storage chamber 10 has the first open / close damper 14 opened. An appropriate amount of air is taken in.

第２の開閉ダンパ１５は、ヒンジを中心として回動することにより、排気口１２を閉じることはないが、第２の開閉ダンパ１５が空気流を横切らない位置と、空気流を大きく横切る最大突出量の位置との間で変化するように動作される。
第２の開閉ダンパ１５が空気流を横切る位置にあるときには、第２の開閉ダンパ１５の下流側には第２の開閉ダンパ１５を横切る空気流によって負圧が発生し、排気口１２にその負圧が供給される。そのため、排気口１２の空気圧が正圧の場合に比べてバッテリ収納室１０に流入する空気量は多くなり、より換気性能が向上され、バッテリの冷却性能は改善される。このようにして発生される排気口１２の負圧は、第２の開閉ダンパ１５の空気流を横切る突出量によって発生し、突出量を大きくすれば負圧も大きくなって換気性能はより高められる。
第２の開閉ダンパ１５が空気流を横切らない位置にあれば、上述のような負圧は発生しないため、バッテリ収納室１０に流れる空気流は吸気口１１の第１の開閉ダンパ１４によってのみ決定される。 The second opening / closing damper 15 does not close the exhaust port 12 by rotating around the hinge, but the position where the second opening / closing damper 15 does not cross the air flow and the maximum protrusion that greatly crosses the air flow. Operated to change between the position of the quantity.
When the second open / close damper 15 is in a position crossing the air flow, a negative pressure is generated on the downstream side of the second open / close damper 15 by the air flow crossing the second open / close damper 15, and the negative pressure is generated in the exhaust port 12. Pressure is supplied. Therefore, the amount of air flowing into the battery storage chamber 10 is increased as compared with the case where the air pressure at the exhaust port 12 is positive, and the ventilation performance is further improved, and the cooling performance of the battery is improved. The negative pressure of the exhaust port 12 generated in this way is generated by the amount of protrusion that crosses the air flow of the second opening / closing damper 15, and if the amount of protrusion is increased, the negative pressure increases and the ventilation performance is further enhanced. .
If the second open / close damper 15 is in a position that does not cross the air flow, the negative pressure as described above is not generated, and therefore the air flow flowing through the battery storage chamber 10 is determined only by the first open / close damper 14 of the intake port 11. Is done.

図１、２において、３６は車体前方側の床下整流板であり、走行時の空気流が吸気口１１にスムースに流れるように機能している。３７は、その床下整流板３６の前方側に、略車幅方向全体に設けられた可動スパッツで、必要時に吸気口１１の前方側に位置して吸気口１１に泥、石などが入るのを防ぐように機能している。更に、３１は電気自動車の車体であり、３２〜３４は電気自動車の前後左右の４つの車輪を示している。   In FIGS. 1 and 2, reference numeral 36 denotes an underfloor rectifying plate on the front side of the vehicle body, which functions so that an air flow during traveling flows smoothly to the intake port 11. 37 is a movable spat provided substantially in the vehicle width direction on the front side of the underfloor rectifying plate 36, and is located on the front side of the intake port 11 when necessary so that mud, stones, etc. enter the intake port 11. It works to prevent. Furthermore, 31 is a vehicle body of the electric vehicle, and 32 to 34 show four wheels on the front, rear, left and right of the electric vehicle.

本発明は、上記実施形態で説明した外観、構成に限定されず、本発明の要旨を変更しない範囲で種々の変更、追加、削除が可能である。例えば、凸部は、第２の開閉ダンパ１５のように動作せず、骨格部材３５の後方端に固定して設けても良い。   The present invention is not limited to the appearance and configuration described in the above embodiment, and various changes, additions, and deletions can be made without changing the gist of the present invention. For example, the convex portion may not be operated like the second opening / closing damper 15 but may be fixed to the rear end of the skeleton member 35.

１０ バッテリ収納室
１１ 吸気口
１２ 排気口
１３ 容器
１４ 第１の開閉ダンパ
１５ 第２の開閉ダンパ
２０ バッテリ
３５ 骨格部材
DESCRIPTION OF SYMBOLS 10 Battery storage chamber 11 Intake port 12 Exhaust port 13 Container 14 1st opening / closing damper 15 2nd opening / closing damper 20 Battery 35 Frame | skeleton member

Claims (2)

車体床部にバッテリを収納するバッテリ収納室を設け、このバッテリ収納室の車両前方側に吸気口、後方側に排気口を設け、また車両走行に伴う空気流を横切る部位に凸部を設け、該凸部の下流側に前記排気口を開口したことを特徴とする電気自動車用バッテリの冷却構造。   A battery storage chamber for storing the battery is provided on the vehicle body floor, an intake port is provided on the front side of the vehicle in the battery storage chamber, an exhaust port is provided on the rear side, and a convex portion is provided at a portion that crosses the air flow associated with vehicle travel, A cooling structure for a battery for an electric vehicle, wherein the exhaust port is opened downstream of the convex portion. 請求項１において、前記凸部は、前記空気流を横切る突出量を可変とされたことを特徴とする電気自動車用バッテリの冷却構造。
2. The cooling structure for an electric vehicle battery according to claim 1, wherein the protrusion has a variable amount of protrusion across the air flow.
JP2011079432A 2011-03-31 2011-03-31 Cooling structure of battery for electric vehicle Withdrawn JP2012214077A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015216013A (en) * 2014-05-09 2015-12-03 株式会社デンソー Battery pack
KR101704571B1 (en) * 2015-09-21 2017-02-08 현대자동차주식회사 Apparatus for cooling battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015216013A (en) * 2014-05-09 2015-12-03 株式会社デンソー Battery pack
KR101704571B1 (en) * 2015-09-21 2017-02-08 현대자동차주식회사 Apparatus for cooling battery

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