JP2015118823A - Battery unit cooling device - Google Patents

Battery unit cooling device Download PDF

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JP2015118823A
JP2015118823A JP2013261986A JP2013261986A JP2015118823A JP 2015118823 A JP2015118823 A JP 2015118823A JP 2013261986 A JP2013261986 A JP 2013261986A JP 2013261986 A JP2013261986 A JP 2013261986A JP 2015118823 A JP2015118823 A JP 2015118823A
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refrigerant
battery unit
battery
introduction passage
passage member
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JP6258693B2 (en
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俊文 高松
Toshibumi Takamatsu
俊文 高松
隆幸 信平
Takayuki Nobuhira
隆幸 信平
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Automotive Energy Supply Corp
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Automotive Energy Supply Corp
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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
    • 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
    • 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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  • Electric Propulsion And Braking For Vehicles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

PROBLEM TO BE SOLVED: To efficiently cool a battery unit.SOLUTION: In a battery unit 11 having multiple laminated battery modules 13, each air passage 19 between the laminated battery modules 13, 13 is sealed from both sides by second seal members 28, 28. Each air passage 18 between an end plate 22 and the battery module 13 is sealed from both sides by third seal members. An introduction duct 17, which introduces cooling air into the battery unit 11, is formed by a first duct member 41, which is made of a resin material and is lightweight, and a second duct member 42, which is made of a metal and has high rigidity. The high rigidity second duct member 42 is connected with the battery unit 11 through the first seal members 28 from a direction perpendicular to a lamination direction of the multiple battery modules 13.

Description

本発明は、例えば、ハイブリッド自動車等の車両に搭載される電池ユニット冷却装置に関する。   The present invention relates to a battery unit cooling device mounted on a vehicle such as a hybrid vehicle.

例えば、特許文献１には、蓄電池が収容された蓄電装置の収容ケースに対して、車室内の後部座席下から取り入れられた空気を供給するとともに、収容ケース内の空気をファンユニットにより吸引して車外に排出する構成が開示されている。   For example, in Patent Document 1, air taken in from under a rear seat in a vehicle compartment is supplied to a storage case of a power storage device in which a storage battery is stored, and air in the storage case is sucked by a fan unit. A configuration for discharging outside the vehicle is disclosed.

この特許文献１においては、車両のトランクルームに配置された収容ケースに、車両幅方向に間隔を空けて並んだ一対の直方体形状の蓄電池が収容されており、各蓄電池は複数の電池モジュールが車両前後方向に間隔を空けて配置された構成となっている。そして、この収容ケースには、吸気ダクトが接続され、この吸気ダクトにより蓄電池冷却用の空気が導入されている。収容ケース内に導入された空気は、収容ケースに接続された排気ダクトから収容ケース外に排出されている。   In this patent document 1, a pair of rectangular parallelepiped storage batteries arranged in the vehicle width direction are stored in a storage case arranged in a trunk room of a vehicle, and each storage battery includes a plurality of battery modules in front and rear of the vehicle. It is the structure arrange | positioned at intervals in the direction. An air intake duct is connected to the housing case, and air for cooling the storage battery is introduced through the air intake duct. Air introduced into the storage case is discharged out of the storage case through an exhaust duct connected to the storage case.

特開２００９−２１８０６７号公報JP 2009-218067 A

しかしながら、このような特許文献１においては、収容ケースに対して、吸気ダクトが単に接続されているにすぎず、収容ケース内に導入された空気の一部は、蓄電池を構成する複数の電池モジュール間の間隙以外の部分を流れて収容ケース外に排出されてしまう可能性もある。つまり、収容ケースに導入された空気の一部は、蓄電池を構成する電池モジュールの冷却に十分に寄与することなく排気ダクトから排出されている可能性があり、収容ケース内に蓄電池を冷却する上で、蓄電装置の構成には更なる改善の余地がある。   However, in Patent Document 1, such an intake duct is merely connected to the housing case, and a part of the air introduced into the housing case is a plurality of battery modules constituting the storage battery. There is a possibility that it will flow out of the housing case through a portion other than the gap between them. In other words, a part of the air introduced into the storage case may be discharged from the exhaust duct without sufficiently contributing to cooling of the battery module constituting the storage battery, and the storage battery is cooled in the storage case. Thus, there is room for further improvement in the configuration of the power storage device.

本発明の電池ユニット冷却装置は、所定の間隔を空けて積層された複数の単電池を有する電池ユニットと、一端が複数の単電池の積層方向に直交する方向から第１シール部材を介して上記電池ユニットに接続され、複数の単電池間の間隙に冷媒を導入する第１冷媒導入通路部材と、上記第１冷媒導入通路部材の他端に一端が接続された第２冷媒導入通路部材と、上記電池ユニットが収容されるケーシングと、を備え、上記ケーシングは、上記電池ユニットを挟んで上記第１冷媒導入通路部材の一端と対向する冷媒排出用の冷媒排出口を有し、上記電池ユニットは、各単電池間に間に介装され、各単電池間の間隙の両側をシールして、上記第１冷媒導入通路部材から導入された冷媒が上記複数の単電池間の間隙を流れて上記冷媒排出口から排出されるようにする第２シール部材を有し、上記第１冷媒導入通路部材は剛性の高い材料からなり、上記第２冷媒導入通路部材は重量の軽い材料からなることを特徴としている。   The battery unit cooling device of the present invention includes a battery unit having a plurality of unit cells stacked at a predetermined interval, and a first end from a direction perpendicular to the stacking direction of the plurality of unit cells via a first seal member. A first refrigerant introduction passage member connected to the battery unit and introducing refrigerant into a gap between the plurality of single cells; a second refrigerant introduction passage member having one end connected to the other end of the first refrigerant introduction passage member; A casing in which the battery unit is accommodated, the casing having a refrigerant discharge port for discharging a refrigerant facing one end of the first refrigerant introduction passage member with the battery unit interposed therebetween, The refrigerant is interposed between the single cells, seals both sides of the gap between the single cells, and the refrigerant introduced from the first refrigerant introduction passage member flows through the gaps between the plurality of single cells. Discharge from refrigerant outlet A second seal member to be, the first refrigerant introduction passage member is made of a material having high rigidity, the second refrigerant introduction passage member is characterized by comprising a lighter material weight.

より具体的には、電池ユニット冷却装置は、車両の車室後方に形成されたトランクルームのフロアパネル上に配置され、上記第１冷媒導入通路部材及び上記第２冷媒導入通路部材は、上記電池ユニットの上方側に位置し、上記冷媒排出口は、上記電池ユニットの下方側に位置している。   More specifically, the battery unit cooling device is disposed on a floor panel of a trunk room formed at the rear of the vehicle compartment of the vehicle, and the first refrigerant introduction passage member and the second refrigerant introduction passage member include the battery unit. The refrigerant discharge port is located on the lower side of the battery unit.

上記第２冷媒導入通路部材の他端は、車内の空間に連通するように構成してもよい。   The other end of the second refrigerant introduction passage member may be configured to communicate with a space in the vehicle.

また、上記冷媒排出口に隣接して配置され、上記冷媒排出口から冷媒を吸い込み、上記第１冷媒導入通路部材の一端から上記冷媒排出口へと向かう冷媒の流れを形成し、吹出口から冷媒を排出するファンユニットを有し、上記吹出口が、車両幅方向に向かって開口するように、電池ユニット冷却装置を構成してもよい。   Further, the refrigerant is disposed adjacent to the refrigerant discharge port, sucks the refrigerant from the refrigerant discharge port, forms a refrigerant flow from one end of the first refrigerant introduction passage member to the refrigerant discharge port, The battery unit cooling device may be configured such that the air outlet has a fan unit and the air outlet opens in the vehicle width direction.

本発明によれば、重量の増加を招くことなく、第１冷媒導入通路部材と複数の単電池との間のシール性を確保することができ、冷媒が単電池間の隙間の外へ漏れでることがなく、複数の単電池に対する冷却性能を向上させることができる。   According to the present invention, the sealing property between the first refrigerant introduction passage member and the plurality of unit cells can be ensured without causing an increase in weight, and the refrigerant leaks out of the gap between the unit cells. In this way, the cooling performance for a plurality of single cells can be improved.

本発明に係る電池ユニット冷却装置が搭載された車両を模式的に示した説明図。Explanatory drawing which showed typically the vehicle by which the battery unit cooling device which concerns on this invention was mounted. 本発明に係る電池ユニット冷却装置を模式的に示した平面図。The top view which showed typically the battery unit cooling device which concerns on this invention. 電池ユニットがケーシングに収容された状態を示す斜視図。The perspective view which shows the state in which the battery unit was accommodated in the casing. 電池モジュール集合体の分解斜視図。The exploded perspective view of a battery module aggregate. 本発明に係る電池ユニット冷却装置の分解斜視図。The disassembled perspective view of the battery unit cooling device which concerns on this invention. 電池モジュールの積層方向に沿った電池ユニット冷却装置の要部断面図。The principal part sectional drawing of the battery unit cooling device along the lamination direction of a battery module. 電池モジュールの積層方向に対して直交する平面に沿った電池ユニット冷却装置の要部断面図。The principal part sectional drawing of the battery unit cooling device along the plane orthogonal to the lamination direction of a battery module.

以下、本発明の一実施例を図面に基づいて詳細に説明する。図１及び図２は、本発明の電池ユニット冷却装置１が搭載された車両２の後方部分を模式的に示した説明図である。   Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG.1 and FIG.2 is explanatory drawing which showed typically the rear part of the vehicle 2 by which the battery unit cooling device 1 of this invention was mounted.

電池ユニット冷却装置１は、車両２の車室３後方に形成されたトランクルーム４のフロアパネル４ａ上に配置されている。車室３とトランクルーム４とは、仕切部材５とリアパーセル６とによって仕切られている。仕切部材５は、後部座席７の背面に沿って配置され、後部座席７の外形状に沿って傾斜している板状の部材である。リアパーセル６は、後部座席７のヘッドレスト７ａ後方に位置する板状の部材である。   The battery unit cooling device 1 is disposed on a floor panel 4 a of a trunk room 4 formed at the rear of the vehicle compartment 3 of the vehicle 2. The vehicle compartment 3 and the trunk room 4 are partitioned by a partition member 5 and a rear parcel 6. The partition member 5 is a plate-like member that is disposed along the back surface of the rear seat 7 and is inclined along the outer shape of the rear seat 7. The rear parcel 6 is a plate-like member located behind the headrest 7 a of the rear seat 7.

なお、本実施例においては、トランクリッド８開口部を通して見た際の見栄えを良くするために、電池ユニット冷却装置１の後方側が板状部材９により覆われる。この板状部材９は、例えば、樹脂材料からなる母材をトランクルーム４の内張りと同一の表皮材（例えば不織布）よって被覆してなるものである。   In this embodiment, the rear side of the battery unit cooling device 1 is covered with the plate-like member 9 in order to improve the appearance when viewed through the opening of the trunk lid 8. The plate-like member 9 is formed, for example, by covering a base material made of a resin material with the same skin material (for example, non-woven fabric) as the lining of the trunk room 4.

この電池ユニット冷却装置１は、複数の扁平な直方体形状の電池モジュール（単電池）１３を有する電池ユニット１１と、細長い直方体形状で金属製のケーシング１５と、ケーシング１５内に冷媒としての空気の流れを生成する冷媒移送手段としての排出ファンユニット１６と、ケーシング１５内の電池ユニット１１に車室３内の空気を供給する導入ダクト１７と、から大略構成されている。   The battery unit cooling apparatus 1 includes a battery unit 11 having a plurality of flat rectangular parallelepiped battery modules (unit cells) 13, an elongated rectangular parallelepiped metal casing 15, and an air flow as a refrigerant in the casing 15. The exhaust fan unit 16 as a refrigerant transfer means for generating the air and the introduction duct 17 for supplying the air in the vehicle compartment 3 to the battery unit 11 in the casing 15 are roughly constituted.

排出ファンユニット１６は、いわゆるシロッコファンであり、当該排出ファンユニット１６に対する空気の流入方向と当該排出ファンユニット１６からの空気の吹き出し方向とが直交している。この排出ファンユニット１６は、空気吹き出し口１６ａからの空気の吹き出し方向が、車両側方を向くように配置されている。なお、図２中の４ｂは、トランクルーム４の車両前後方向に沿ったサイドパネルである。   The exhaust fan unit 16 is a so-called sirocco fan, and the inflow direction of air to the exhaust fan unit 16 and the direction of blowing air from the exhaust fan unit 16 are orthogonal to each other. The discharge fan unit 16 is arranged such that the air blowing direction from the air blowing port 16a faces the vehicle side. In addition, 4b in FIG. 2 is the side panel along the vehicle front-back direction of the trunk room 4. As shown in FIG.

電池ユニット１１は、図３に示すように、複数の電池モジュール１３が最も広い側面が向き合うように積層されてなる一対の電池モジュール集合体１２ａ、１２ｂと、これら一対の電池モジュール集合体１２ａ、１２ｂの充放電の制御等を行うコントローラとしてのバッテリコントローラ２１と、から大略構成され、細長い直方体形状のケーシング１５内に収容されている。   As shown in FIG. 3, the battery unit 11 includes a pair of battery module assemblies 12a and 12b in which a plurality of battery modules 13 are stacked so that the widest side faces each other, and the pair of battery module assemblies 12a and 12b. The battery controller 21 is a controller that controls charging / discharging of the battery and is housed in an elongated rectangular parallelepiped casing 15.

図４は、電池モジュール集合体１２の概略構成を模式的に示した分解斜視図である。電池モジュール集合体１２は、５個の電池モジュール１３と、この５個の電池モジュール１３を当該電池モジュール１３の積層方向で挟み込む一対のエンドプレート２２、２２と、各電池モジュール１３、１３間の両側に介装されたスペーサ２３、２３と、５つの電池モジュール１３を電気的に接続するバスバー２４と、から大略構成されている。   FIG. 4 is an exploded perspective view schematically showing a schematic configuration of the battery module assembly 12. The battery module assembly 12 includes five battery modules 13, a pair of end plates 22 and 22 that sandwich the five battery modules 13 in the stacking direction of the battery modules 13, and both sides between the battery modules 13 and 13. The spacers 23 and 23 interposed between the two and the bus bar 24 that electrically connects the five battery modules 13 are generally configured.

エンドプレート２２は、矩形板状を呈し、隣接する電池モジュール１３とは所定の間隔を空けて離間している。電池モジュール１３に対向するエンドプレート２２の内側面２２ａの両側には、電池モジュール１３に密着する細長い第３シール部材２５、２５が縦方向に延接して取り付けられている。これら第３シール部材２５、２５によって、エンドプレート２２と電池モジュール１３との間には、空気通路１８（図６参照）が形成されている。   The end plate 22 has a rectangular plate shape and is separated from the adjacent battery module 13 with a predetermined interval. On both sides of the inner side surface 22a of the end plate 22 facing the battery module 13, elongated third seal members 25, 25 that are in close contact with the battery module 13 are attached so as to extend in the vertical direction. An air passage 18 (see FIG. 6) is formed between the end plate 22 and the battery module 13 by the third seal members 25 and 25.

スペーサ２３は、細長い矩形板状の部材を折曲してなり、電池モジュール１３、１３間に挟み込まれる基部２６と、電池モジュール１３の積層方向に基部２６から折曲された両側の端部２７ａ、２７ｂと、から大略構成され、電池モジュール１３、１３間に所定の間隔を設定する。   The spacer 23 is formed by bending an elongated rectangular plate-like member, and includes a base portion 26 sandwiched between the battery modules 13 and 13, and end portions 27 a on both sides bent from the base portion 26 in the stacking direction of the battery modules 13. 27b, and a predetermined interval is set between the battery modules 13 and 13.

基部２６には、電池モジュール１３、１３間にあって両者に密着する第２シール部材２８が取り付けられている。これら第２シール部材２８によって、電池モジュール１３、１３間には、空気通路１９（図６参照）が形成されている。第２シール部材２８と第３シール部材２５とは、平面でみて一直線状に並ぶように配置される。   A second seal member 28 that is between the battery modules 13 and 13 and is in close contact with the both is attached to the base portion 26. By these second seal members 28, an air passage 19 (see FIG. 6) is formed between the battery modules 13 and 13. The second seal member 28 and the third seal member 25 are arranged so as to be aligned in a straight line when viewed in plan.

スペーサ２３の両側にスペーサ２３が略コ字状になるように折曲されて形成されている端部２７には、それぞれネジ部３０が取り付けられている。スペーサ２３の端部２７ａ、２７ｂのうち、車両２搭載時に上方側（図４における上方側）となる端部２７ａ側のネジ部３０により、導入ダクト１７の第２ダクト部材４２（図５参照）が電池モジュール集合体１２と連結される。スペーサ２３の端部２７ａ、２７ｂのうち、車両２搭載時に下方側（図４における下方側）となる端部２７ｂ側のネジ部３０により、ケーシング１５の底面に電池モジュール集合体１２が連結される。詳細は後述する。   Screw portions 30 are respectively attached to end portions 27 formed by bending the spacers 23 so as to be substantially U-shaped on both sides of the spacers 23. Of the end portions 27a and 27b of the spacer 23, the second duct member 42 of the introduction duct 17 (see FIG. 5) is formed by the screw portion 30 on the end portion 27a side that is the upper side (the upper side in FIG. 4) when the vehicle 2 is mounted. Are connected to the battery module assembly 12. Of the end portions 27a and 27b of the spacer 23, the battery module assembly 12 is connected to the bottom surface of the casing 15 by the screw portion 30 on the end portion 27b side that is the lower side (lower side in FIG. 4) when the vehicle 2 is mounted. . Details will be described later.

バスバー２４は、ナット３１と電池モジュール１３の対向する位置に突設されたネジ部（図示せず）により複数の電池モジュール１３に跨って連結されている。   The bus bar 24 is connected across the plurality of battery modules 13 by screw portions (not shown) protruding from the positions where the nut 31 and the battery module 13 face each other.

電池モジュール集合体１２においては、各電池モジュール１３の略４隅を貫通するボルト３２と、これらボルト３２と螺合するナット３３と、により５個の電池モジュール１３が互いに連結されている。ボルト３２は、エンドプレート２２、２２の４隅を貫通するとともに、電池モジュール１３の積層方向で各スペーサ２３の基部２６をも貫通している。また、電池モジュール１３、エンドプレート２２及びスペーサ２３に形成されるボルト３２の貫通穴３４、３５、３６は、ボルト３２の軸部よりも大径となるように形成されている。   In the battery module assembly 12, five battery modules 13 are connected to each other by bolts 32 penetrating substantially four corners of each battery module 13 and nuts 33 screwed into the bolts 32. The bolt 32 penetrates through the four corners of the end plates 22 and 22 and also penetrates the base portion 26 of each spacer 23 in the stacking direction of the battery modules 13. Further, the through holes 34, 35, 36 of the bolt 32 formed in the battery module 13, the end plate 22 and the spacer 23 are formed so as to have a larger diameter than the shaft portion of the bolt 32.

図５は、電池ユニット冷却装置１の分解斜視図である。導入ダクト１７は、上流端がリアパーセル６に開口し、下流端が後述する第１ダクト部材４１に連通する上流ダクト部材４０と、下流側が二股形状に分岐して後述の第２ダクト部材４２に連通する中空の第１ダクト部材４１と、第１ダクト部材４１の下流端に環状のシール材４３を介して連通接続された第２ダクト部材４２と、を有している。   FIG. 5 is an exploded perspective view of the battery unit cooling device 1. The introduction duct 17 has an upstream end that opens into the rear parcel 6, a downstream end that communicates with a first duct member 41 that will be described later, and a downstream side that branches into a bifurcated shape into a second duct member that will be described later. A hollow first duct member 41 that communicates with the first duct member 41 and a second duct member 42 that communicates with the downstream end of the first duct member 41 via an annular seal member 43.

上流ダクト部材４０及び第１ダクト部材４１は、例えば樹脂材料等の重量の軽い材料からなり、二股形状に分岐した下流側の分岐管部４４、４４の外周面に鍔状のフランジ４４ａが形成されている。このフランジ４４ａは、ケーシング１５の上面に短いボルト４５（後述の図６を参照）で固定される。   The upstream duct member 40 and the first duct member 41 are made of a light material such as a resin material, for example, and a flange-like flange 44a is formed on the outer peripheral surface of the downstream branch pipe portions 44 and 44 branched into a bifurcated shape. ing. The flange 44a is fixed to the upper surface of the casing 15 with a short bolt 45 (see FIG. 6 described later).

第２ダクト部材４２は、金属等の剛性の高い材料からなり、二股形状の第１ダクト部材４１の分岐管部４４の下流端に夫々対応する２つの空気導入路４６、４６を有している。空気導入路４６、４６の下流側端は、対応する電池モジュール集合体１２に対して環状の第１シール部材４７、４７を介してそれぞれ接続されている。すなわち、導入ダクト１７は、一端が電池モジュール１３の積層方向に直交する方向から第１シール部材４７を介して電池ユニット１１に接続される第１冷媒導入通路部材としての第２ダクト部材４２と、第２ダクト部材４２の他端にシール材４３を介して接続された第２冷媒導入通路部材としての第１ダクト部材４１と、を有している。   The second duct member 42 is made of a highly rigid material such as metal and has two air introduction paths 46 and 46 respectively corresponding to the downstream ends of the branch pipe portions 44 of the bifurcated first duct member 41. . The downstream ends of the air introduction passages 46 and 46 are connected to the corresponding battery module assemblies 12 via annular first seal members 47 and 47, respectively. That is, the introduction duct 17 has a second duct member 42 as a first refrigerant introduction passage member, one end of which is connected to the battery unit 11 via the first seal member 47 from a direction perpendicular to the stacking direction of the battery modules 13. And a first duct member 41 as a second refrigerant introduction passage member connected to the other end of the second duct member 42 via a seal material 43.

ケーシング１５は、断面が略コ字形の細長いアッパー部材５１と、アッパー部材５１の一側面の開口５２を覆うカバー部材５３と、細長い矩形板状のロア部材５４と、矩形板状の一対のサイド部材５５、５５と、から構成されている。   The casing 15 includes an elongated upper member 51 having a substantially U-shaped cross section, a cover member 53 covering an opening 52 on one side of the upper member 51, an elongated rectangular plate-like lower member 54, and a pair of rectangular plate-like side members. 55, 55.

アッパー部材５１には、第１ダクト部材４１の下流端である分岐管部４４が挿入される２つのアッパー開口部５６、５６が上部に形成されている。   The upper member 51 is formed with two upper openings 56, 56 into which the branch pipe portion 44 that is the downstream end of the first duct member 41 is inserted.

カバー部材５３は、アッパー部材５１の一側面の開口５２から突出する電池ユニット１１のバッテリコントローラ２１を覆うものであり、略皿形状を呈している。カバー部材５３は、アッパー部材５１に、スポット溶接等により接合される。   The cover member 53 covers the battery controller 21 of the battery unit 11 protruding from the opening 52 on one side surface of the upper member 51, and has a substantially dish shape. The cover member 53 is joined to the upper member 51 by spot welding or the like.

ロア部材５４には、アッパー部材５１の２つのアッパー開口部５６、５６と対向するように冷媒排出口としての２つのロア開口部５７、５７が形成されている。各ロア開口部５７の下方には、排出ファンユニット１６（図７参照）がそれぞれ配置される。サイド部材５５は、アッパー部材５１とロア部材５４とを接合してなる筒状体の両端を塞ぐものであり、３辺がアッパー部材５１に対してスポット溶接等により接合される。このロア部材５４とサイド部材５５の１辺は、アッパー部材５１にボルト（図示せず）により接合される。   The lower member 54 is formed with two lower openings 57 and 57 as refrigerant discharge ports so as to face the two upper openings 56 and 56 of the upper member 51. Below each lower opening 57, the discharge fan unit 16 (see FIG. 7) is arranged. The side member 55 closes both ends of a cylindrical body formed by joining the upper member 51 and the lower member 54, and three sides are joined to the upper member 51 by spot welding or the like. One side of the lower member 54 and the side member 55 is joined to the upper member 51 by a bolt (not shown).

２つの電池モジュール集合体１２ａ、１２ｂからなる電池ユニット１１は、スペーサ２３（図４参照）の下方側となる端部２７ｂのネジ部３０をロア部材５４の孔５４ａに貫通させてナット（図示せず）によりロア部材５４に連結される。また、電池ユニット１１は、電池モジュール１３の積層方向に直交する上方向から第１シール部材４７を介して、スペーサ２３の上方側となる端部２７ａのネジ部３０を第２ダクト部材４２の孔４２ａに貫通させて図外のナットにより第２ダクト部材４２に締結されて、第２ダクト部材４２の空気導入路４６に接続されている。   The battery unit 11 composed of the two battery module assemblies 12a and 12b has a nut (not shown) passing through the hole 30a of the lower member 54 through the threaded portion 30 of the end 27b on the lower side of the spacer 23 (see FIG. 4). To the lower member 54. Further, the battery unit 11 has the screw portion 30 of the end portion 27a on the upper side of the spacer 23 from the upper direction perpendicular to the stacking direction of the battery modules 13 through the first seal member 47, and the hole of the second duct member 42. The second duct member 42 is fastened to the second duct member 42 by a nut (not shown) through the 42a, and is connected to the air introduction path 46 of the second duct member 42.

第１シール部材４７は、図６、図７に示すように、各第２シール部材２８の上端及び各第３シール部材２５の上端に密接する。つまり上方からみた場合に、各第２シール部材２８と各第３シール部材２５は、第１シール部材４７と重なる位置に配置されている。図６は、電池モジュール１３の積層方向に沿った電池ユニット冷却装置１の要部断面図であり、図７は、電池モジュール１３の積層方向に対して直交する平面に沿った電池ユニット冷却装置１の要部断面図である。なお、図６及び図７中の６１は、スペーサ２３の端部２７ａに形成され第２ダクト部材４２を貫通するネジ部３０に螺合するナットである。   As shown in FIGS. 6 and 7, the first seal member 47 is in close contact with the upper ends of the second seal members 28 and the upper ends of the third seal members 25. That is, when viewed from above, each second seal member 28 and each third seal member 25 are disposed at a position overlapping the first seal member 47. FIG. 6 is a cross-sectional view of the main part of the battery unit cooling device 1 along the stacking direction of the battery modules 13, and FIG. 7 is the battery unit cooling device 1 along the plane orthogonal to the stacking direction of the battery modules 13. FIG. In FIG. 6 and FIG. 7, reference numeral 61 denotes a nut that is formed on the end portion 27 a of the spacer 23 and screwed into the screw portion 30 that passes through the second duct member 42.

各電池モジュール１３、１３間に形成された空気通路１９は、第１シール部材４７と第２シール部材２８とによって画成され、電池モジュール１３とエンドプレート２２との間に形成された空気通路１８は、第１シール部材４７と第３シール部材２５とによって画成される。   The air passage 19 formed between the battery modules 13 and 13 is defined by the first seal member 47 and the second seal member 28, and the air passage 18 formed between the battery module 13 and the end plate 22. Is defined by the first seal member 47 and the third seal member 25.

導入ダクト１７から導入される空気で電池モジュール１３を効率よく冷却するために、導入された空気が電池モジュール１３の最も広い側面上を流れるのが望ましい。つまり、導入ダクト１７から電池モジュール集合体１２に導入された空気が、電池モジュール１３、１３間の空気通路１９や、電池モジュール１３とエンドプレート２２との間の空気通路１８を効率良く流れる。   In order to efficiently cool the battery module 13 with the air introduced from the introduction duct 17, it is desirable that the introduced air flows on the widest side surface of the battery module 13. That is, the air introduced into the battery module assembly 12 from the introduction duct 17 efficiently flows through the air passage 19 between the battery modules 13 and 13 and the air passage 18 between the battery module 13 and the end plate 22.

電池モジュール１３、１３間の空気通路１９は、第２シール部材２８によって両側がシールされるため、この空気通路１９から電池モジュール１３の両側に空気が流れ出てしまうことはない。電池モジュール１３とエンドプレート２２との空気通路１８は、第３シール部材２５によって両側がシールされるため、この空気通路１８から電池モジュール１３の両側に空気が流れ出てしまうこともない。   Since both sides of the air passage 19 between the battery modules 13 and 13 are sealed by the second seal member 28, air does not flow out from the air passage 19 to both sides of the battery module 13. Since both sides of the air passage 18 between the battery module 13 and the end plate 22 are sealed by the third seal member 25, air does not flow out from the air passage 18 to both sides of the battery module 13.

電池モジュール１３、１３間の空気通路１９や、電池モジュール１３とエンドプレート２２との間の空気通路１８に、導入ダクト１７からの空気が全て流れ込むようにするには、電池モジュール集合体１２と導入ダクト１７との接続部分のシール性が重要となる。   In order to allow all the air from the introduction duct 17 to flow into the air passage 19 between the battery modules 13 and 13 and the air passage 18 between the battery module 13 and the end plate 22, the battery module assembly 12 and the introduction are introduced. The sealability of the connecting portion with the duct 17 is important.

上述したように、寸法誤差を許容して組立てることができるようにするために、電池モジュール１３の４隅に形成された各貫通穴３４，３５，３６は挿入されるボルト３２よりも大径となっている。そのため、組立てた後の電池モジュール集合体１２において、各電池モジュール１３同士が互いに少しもずれることなく重なり合うように連結することは難しい。つまり、各電池モジュール１３の上端面が厳密に同一平面上に位置するように、電池モジュール集合体１２を組み立てることは難しく、導入ダクト１７の下流端を電池モジュール集合体１２の上端端面に突き当てただけでは、電池モジュール集合体１２の上端面の位置が面一にならない場合が多く、導入ダクト１７からの空気の一部が導入ダクト１７の下流端と電池モジュール集合体１２の上端端面との間の隙間から電池モジュール集合体１２の外側に流出してしまう。   As described above, each of the through holes 34, 35, 36 formed at the four corners of the battery module 13 has a diameter larger than that of the bolt 32 to be inserted in order to allow assembly with a dimensional error. It has become. For this reason, in the assembled battery module assembly 12, it is difficult to connect the battery modules 13 so as to overlap each other without any deviation. That is, it is difficult to assemble the battery module assembly 12 so that the upper end surfaces of the respective battery modules 13 are located exactly on the same plane, and the downstream end of the introduction duct 17 is abutted against the upper end end surface of the battery module assembly 12. In many cases, the position of the upper end surface of the battery module assembly 12 is not always flush, and a part of the air from the introduction duct 17 is formed between the downstream end of the introduction duct 17 and the upper end end surface of the battery module assembly 12. It will flow out of the battery module assembly 12 from the gap between them.

電池モジュール集合体１２に接続される導入ダクト１７は、全て樹脂製とすれば軽量になるものの剛性が低下するため、変形により当該導入ダクト１７と電池モジュール集合体１２との連結部分のシール性が確保できなくなる虞がある。   Since the introduction duct 17 connected to the battery module assembly 12 is all made of resin, the weight is reduced, but the rigidity is reduced. Therefore, the sealing property of the connecting portion between the introduction duct 17 and the battery module assembly 12 is reduced by deformation. There is a possibility that it cannot be secured.

また、導入ダクト１７を全て剛性の高い金属製とすれば、導入ダクト１７の変形は防止できるものの重量が増加してしまう。   Further, if the introduction duct 17 is made of a highly rigid metal, the introduction duct 17 can be prevented from being deformed, but the weight increases.

本実施例では、電池ユニット１１に空気を導入する導入ダクト１７を樹脂材料からなる軽量な第１ダクト部材４１と金属製で剛性の高い第２ダクト部材４２とから構成し、剛性の高い第２ダクト部材４２を第１シール部材４７を介して電池ユニット１１に押し当てて接続することで、各電池モジュール１３の上端が同一平面内になくても第１シール部材４７が剛性の高い第２ダクト部材４２で押さえつけられることで変形して、シール機能を発揮させることができ、導入ダクト１７の重量増加を招くことなく導入ダクト１７と電池ユニット１１との間のシール性を確保することができる。   In this embodiment, the introduction duct 17 for introducing air into the battery unit 11 is composed of a lightweight first duct member 41 made of a resin material and a second duct member 42 made of metal and having high rigidity. The duct member 42 is pressed and connected to the battery unit 11 via the first seal member 47, so that the first seal member 47 has a high rigidity even if the upper ends of the battery modules 13 are not in the same plane. By being pressed by the member 42, it can be deformed to exhibit a sealing function, and the sealing performance between the introduction duct 17 and the battery unit 11 can be ensured without causing an increase in the weight of the introduction duct 17.

そのため、第２ダクト部材４２の空気導入路４６から電池モジュール集合体１２に導入された空気は、電池モジュール１３、１３間の空気通路１９もしくは電池モジュール１３とエンドプレート２２との間の空気通路１８のいずれかを電池モジュール集合体１２の下端まで流れてケーシング１５のロア開口部５７から排出されることになり、空気通路１９及び空気通路１８の外側といった電池モジュール集合体１２の外周側に導入ダクト１７からの空気が分散して流れてしまう場合に比べて、各電池モジュール１３を効率良く冷却することができる。   Therefore, the air introduced into the battery module assembly 12 from the air introduction path 46 of the second duct member 42 is the air passage 19 between the battery modules 13, 13 or the air passage 18 between the battery module 13 and the end plate 22. Any one of the battery module assembly 12 flows to the lower end of the battery module assembly 12 and is discharged from the lower opening 57 of the casing 15, and is introduced to the outer peripheral side of the battery module assembly 12 such as the outside of the air passage 19 and the air passage 18. Each battery module 13 can be efficiently cooled compared to the case where the air from 17 flows in a distributed manner.

上述した実施例では、エンドプレート２２と電池モジュール１３との間に吸気通路１８を設定したが、この吸気通路１８を設定しないようにしてもよい。この場合には、電池ユニットの冷却効率が相対的には低下するものの、エンドプレート２２に取り付けられた第３シール部材２５を省略できる。   In the above-described embodiment, the intake passage 18 is set between the end plate 22 and the battery module 13, but the intake passage 18 may not be set. In this case, although the cooling efficiency of the battery unit is relatively lowered, the third seal member 25 attached to the end plate 22 can be omitted.

１…電池ユニット冷却装置
１１…電池ユニット
１２…電池モジュール集合体
１３…電池モジュール
１５…ケーシング
１６…排出ファンユニット
１７…導入ダクト
２２…エンドプレート
２３…スペーサ
２５…第３シール部材
２８…第２シール部材
４１…第１ダクト部材
４２…第２ダクト部材
４７…第１シール部材 DESCRIPTION OF SYMBOLS 1 ... Battery unit cooling device 11 ... Battery unit 12 ... Battery module assembly 13 ... Battery module 15 ... Casing 16 ... Exhaust fan unit 17 ... Introduction duct 22 ... End plate 23 ... Spacer 25 ... Third seal member 28 ... Second seal Member 41 ... First duct member 42 ... Second duct member 47 ... First seal member

Claims (4)

所定の間隔を空けて積層された複数の単電池を有する電池ユニットと、
一端が複数の単電池の積層方向に直交する方向から第１シール部材を介して上記電池ユニットに接続され、複数の単電池間の間隙に冷媒を導入する第１冷媒導入通路部材と、
上記第１冷媒導入通路部材の他端に一端が接続された第２冷媒導入通路部材と、
上記電池ユニットが収容されるケーシングと、を備え、
上記ケーシングは、上記電池ユニットを挟んで上記第１冷媒導入通路部材の一端と対向する冷媒排出用の冷媒排出口を有し、
上記電池ユニットは、各単電池間に間に介装され、各単電池間の間隙の両側をシールして、上記第１冷媒導入通路部材から導入された冷媒が上記複数の単電池間の間隙を流れて上記冷媒排出口から排出されるようにする第２シール部材を有し、
上記第１冷媒導入通路部材は剛性の高い材料からなり、
上記第２冷媒導入通路部材は重量の軽い材料からなることを特徴とする電池ユニット冷却装置。 A battery unit having a plurality of single cells stacked at a predetermined interval; and
A first refrigerant introduction passage member, one end of which is connected to the battery unit via a first seal member from a direction perpendicular to the stacking direction of the plurality of unit cells, and introduces a refrigerant into a gap between the plurality of unit cells;
A second refrigerant introduction passage member having one end connected to the other end of the first refrigerant introduction passage member;
A casing in which the battery unit is accommodated,
The casing has a refrigerant discharge port for discharging a refrigerant that faces one end of the first refrigerant introduction passage member across the battery unit,
The battery unit is interposed between the single cells, seals both sides of the gap between the single cells, and the refrigerant introduced from the first refrigerant introduction passage member is a gap between the plurality of single cells. A second seal member that flows through the refrigerant outlet and flows through the refrigerant,
The first refrigerant introduction passage member is made of a highly rigid material,
The battery unit cooling device, wherein the second refrigerant introduction passage member is made of a light material. 車両の車室後方に形成されたトランクルームのフロアパネル上に配置され、
上記第１冷媒導入通路部材及び上記第２冷媒導入通路部材は、上記電池ユニットの上方側に位置し、
上記冷媒排出口は、上記電池ユニットの下方側に位置することを特徴とする請求項１に記載の電池ユニット冷却装置。 Arranged on the floor panel of the trunk room formed at the rear of the vehicle compartment,
The first refrigerant introduction passage member and the second refrigerant introduction passage member are located above the battery unit,
The battery unit cooling device according to claim 1, wherein the refrigerant discharge port is positioned below the battery unit. 上記第２冷媒導入通路部材の他端は、車内の空間に連通することを特徴とする請求項２に記載の電池ユニット冷却装置。   The battery unit cooling device according to claim 2, wherein the other end of the second refrigerant introduction passage member communicates with a space in the vehicle. 上記冷媒排出口に隣接して配置され、上記冷媒排出口から冷媒を吸い込み、上記第１冷媒導入通路部材の一端から上記冷媒排出口へと向かう冷媒の流れを形成し、吹出口から冷媒を排出するファンユニットを有し、
上記吹出口が、車両幅方向に向かって開口することを特徴とする請求項１〜３のいずれかに記載の電池ユニット冷却装置。 The refrigerant is disposed adjacent to the refrigerant outlet, sucks the refrigerant from the refrigerant outlet, forms a refrigerant flow from one end of the first refrigerant introduction passage member to the refrigerant outlet, and discharges the refrigerant from the outlet. A fan unit that
The battery unit cooling device according to any one of claims 1 to 3, wherein the air outlet opens toward the vehicle width direction.
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