JP2019123355A - Vehicle body structure of electric vehicle - Google Patents

Vehicle body structure of electric vehicle Download PDF

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Publication number
JP2019123355A
JP2019123355A JP2018004914A JP2018004914A JP2019123355A JP 2019123355 A JP2019123355 A JP 2019123355A JP 2018004914 A JP2018004914 A JP 2018004914A JP 2018004914 A JP2018004914 A JP 2018004914A JP 2019123355 A JP2019123355 A JP 2019123355A
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Prior art keywords
floor
floor panel
battery pack
vehicle
fastening
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JP2018004914A
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JP7198422B2 (en
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直弘 山本
Naohiro Yamamoto
直弘 山本
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Suzuki Motor Corp
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Suzuki Motor Corp
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Priority to JP2018004914A priority Critical patent/JP7198422B2/en
Priority to DE102019100748.8A priority patent/DE102019100748A1/en
Priority to FR1900329A priority patent/FR3076796B1/en
Priority to CN201910040105.2A priority patent/CN110040179B/en
Publication of JP2019123355A publication Critical patent/JP2019123355A/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
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66—Arrangements of batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/09—Means for mounting load bearing surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • 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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
    • B60K2001/0438—Arrangement under the floor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0455—Removal or replacement of the energy storages
    • B60K2001/0472—Removal or replacement of the energy storages from below
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection

Abstract

To provide a vehicle body structure of an electric vehicle capable of securing a battery pack mounting space in a wide range under a floor, and securing vibration rigidity of a floor center part.SOLUTION: A battery pack (3) storing a battery module (30) is supported in a separated state (F1-F4) to a lower side of a floor panel (2, 23) by a plurality of support members (45, 46, 47, 48) provided on both side parts of the battery pack in a separated manner in a vehicle length direction, a top surface (33) of the battery pack (3) is coupled to the floor panel by a plurality of fastening parts (P1, P2) arranged in a surface direction of the top surface in a discrete manner. The respective fastening parts (P1, P2, P3) include a bolt/nut (33b/23b) fastened to the floor panel by a bolt hole penetrating a fastening surface being provided individually in a dent state, the respective fastening parts have an upper end provided on a lower position of a general surface of the floor panel.SELECTED DRAWING: Figure 3

Description

本発明は、電動車両の車体構造に関する。   The present invention relates to a vehicle body structure of an electric vehicle.

電動車両（ＥＶ）は、航続距離を確保するためには電源となるバッテリパックが大容量化される必要がある。乗用車では、車両室内空間や荷室空間を確保しつつバッテリパックを大型化するために、バッテリパックは扁平化されてフロア下の広範囲に配置されるのが一般的である（例えば特許文献１参照）。   In the electric powered vehicle (EV), in order to secure the cruising distance, it is necessary to increase the capacity of the battery pack serving as the power source. In a passenger car, in order to increase the size of the battery pack while securing the vehicle interior space and the cargo space, the battery pack is generally flattened and disposed in a wide area under the floor (see, for example, Patent Document 1) ).

国際公開第２０１２／５４２７９０号公報International Publication No. 2012/542790 gazette

ところで、現在主流のモノコック構造の車両では、車体の剛性を確保するための骨格構造としてフロアトンネルが重要な役割を果たしているが、フロア下にバッテリパックの搭載スペースが設定される場合、フロア面の上昇分だけフロアトンネルの高さが減少し（断面係数が減少し）、フロア中央の振動剛性を確保し難い問題が有った。   By the way, the floor tunnel plays an important role as a frame structure for securing the rigidity of the vehicle body in the mainstream vehicle of the monocoque structure at present, but when the mounting space of the battery pack is set under the floor, The height of the floor tunnel decreases (the section coefficient decreases) by the amount of rise, and there is a problem that it is difficult to secure the vibration rigidity at the center of the floor.

本発明はこのような実状に鑑みてなされたものであって、その目的は、フロア下の広範囲にバッテリパック搭載スペースを確保しつつ、フロア中央の振動剛性を確保するのに有利な電動車両の車体構造を提供することにある。   The present invention has been made in view of such a situation, and its object is to provide an electric vehicle that is advantageous for securing vibration rigidity at the center of the floor while securing a battery pack mounting space in a wide area under the floor. It is to provide a car body structure.

上記課題を解決するために、本発明に係る電動車両の車体構造は、バッテリモジュールを収納したバッテリパックが、その両側部に車長方向に離間して配設された複数の支持部在により、フロアパネルの下側に離間して支持され、かつ、前記バッテリパックの上面が、その面方向に離散的に配設された複数の締結部で前記フロアパネルに結合されている。   In order to solve the above problems, according to a vehicle body structure of an electric vehicle according to the present invention, a battery pack containing a battery module is provided with a plurality of support portions provided on both sides thereof in a vehicle length direction. The lower surface of the floor panel is supported in a spaced manner, and the upper surface of the battery pack is coupled to the floor panel at a plurality of discretely disposed fastening portions in the surface direction.

本発明に係る電動車両の車体構造は、上記のように、バッテリパックが両側部の支持部在によりフロアパネルの下側に離間して支持され、かつ、バッテリパックの上面が離散的に配設された複数の締結部でフロアパネルに結合されている構成により、バッテリパックの剛性を利用してフロア中央の振動が抑制され、フロア下の広範囲にバッテリパック搭載スペースを確保しつつ、フロア中央の振動剛性を確保するうえで有利である。   As described above, in the vehicle body structure of the electric vehicle according to the present invention, the battery pack is separately supported on the lower side of the floor panel by the support portions on both sides, and the upper surface of the battery pack is discretely disposed. The structure coupled to the floor panel at the plurality of fastening portions suppresses the vibration at the center of the floor by using the rigidity of the battery pack, and while securing the battery pack mounting space in a wide area under the floor, It is advantageous in securing vibration rigidity.

本発明実施形態に係る電動車両を下方から見た斜視図である。1 is a perspective view of an electric vehicle according to an embodiment of the present invention as viewed from below. 本発明実施形態に係る電動車両の車体フロアを示す平面図である。FIG. 1 is a plan view showing a vehicle body floor of an electric vehicle according to an embodiment of the present invention. 図２のＸ−Ｘ断面図である。It is XX sectional drawing of FIG. 図３の要部拡大断面図である。It is a principal part expanded sectional view of FIG.

以下、本発明の一実施形態について図面を参照しながら詳細に説明する。
図１および図２において、電動車両１の車体下面を画成するフロアパネル２は、その両側部において車長方向ＦＲに延びるサイドシル１４，１４に接合され、それらの車幅方向中央側に隣接したフロアパネル２の下面には、車長方向ＦＲに延びるフロアサイドメンバー１０，１０が接合されている。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
1 and 2, the floor panel 2 defining the lower surface of the electric vehicle 1 is joined to the side sills 14 and 14 extending in the vehicle length direction FR on both sides thereof and is adjacent to the center side in the vehicle width direction On the lower surface of the floor panel 2, floor side members 10, 10 extending in the vehicle length direction FR are joined.

フロアサイドメンバー１０，１０は、図３に示すように、逆ハット状断面を有し、両側フランジ部においてフロアパネル２の下面に溶接接合され、その内部に長手方向に延在する閉断面が画成されている。フロアサイドメンバー１０，１０は、図２に示すように、車両後方に向かい互いの間隔が拡大するように平面視において斜めに配設されている。   As shown in FIG. 3, the floor side members 10, 10 have an inverted hat-like cross section and are welded to the lower surface of the floor panel 2 at the flanges on both sides, and a closed cross section extending longitudinally in the inside is defined. It is made. As shown in FIG. 2, the floor side members 10, 10 are obliquely disposed in a plan view so that the distance between the floor side members 10, 10 increases toward the rear of the vehicle.

フロアパネル２は、フロアサイドメンバー１０，１０が接合された部分の車幅方向Ｗ外方（ＷＲ，ＷＬ）および車長方向ＦＲの前部の低位面２１（基本面）に対して、左右のフロアサイドメンバー１０，１０の車幅方向Ｗ中央側は段差面２２を介して車高方向Ｈに隆起した高位面２３が形成されており、その下側に、バッテリパック３の搭載空間２０が画成されている。バッテリパック３の支持構造については後述する。   The floor panel 2 is provided to the left and right with respect to the lower surface 21 (basic surface) of the front in the vehicle width direction W (WR, WL) of the portion where the floor side members 10 are joined and the vehicle length direction FR. A high-level surface 23 raised in the vehicle height direction H via the step surface 22 is formed on the center side in the vehicle width direction W of the floor side members 10, 10, and the mounting space 20 of the battery pack 3 is drawn below it. It is made. The support structure of the battery pack 3 will be described later.

フロアパネル２の車幅方向Ｗの中央には車長方向ＦＲに延びるフロアトンネル２４が設けられている。フロアトンネル２４は、フロアパネル２に対して車高方向Ｈに膨出したハット状断面をなしており、フロアトンネル２４の頂面は、フロアパネル２の最高位面２９の前方では高さ変化が殆ど無いが、フロアパネル２の低位面２１の区間に対し、高位面２３の区間では比高が小さくなる。これは、換言すれば、フロアパネル２の高位面２３は、フロアトンネル２４が車幅方向Ｗに拡幅された部分であるとも言える。なお、フロアパネル２最高位面２９は、不図示の後部座席シートクッションの取付けベースとなる。   At the center of the floor panel 2 in the vehicle width direction W, a floor tunnel 24 extending in the vehicle length direction FR is provided. The floor tunnel 24 has a hat-like cross section which bulges in the vehicle height direction H with respect to the floor panel 2, and the top surface of the floor tunnel 24 has a height change in front of the highest surface 29 of the floor panel 2. Although there is almost no, in the section of the high level surface 23 relative to the section of the low level surface 21 of the floor panel 2, the specific height becomes smaller. In other words, it can be said that the high level surface 23 of the floor panel 2 is a portion where the floor tunnel 24 is widened in the vehicle width direction W. The floor panel 2 highest surface 29 is a mounting base of a rear seat cushion not shown.

フロアパネル２の上面側には、図２に示すように、左右のサイドシル１４，１４とフロアトンネル２４との間に車幅方向Ｗに延びる２つのフロアクロスメンバー１１，１２が車長方向ＦＲに離間して接合されている。各フロアクロスメンバー１１，１２は、何れもハット状断面を有し、それぞれの内部に車幅方向Ｗに延びる閉断面が画成されている。なお、フロアクロスメンバー１１，１２は、不図示の左右前部座席の取付けベースとなる。   On the upper surface side of the floor panel 2, as shown in FIG. 2, two floor cross members 11, 12 extending in the vehicle width direction W between the left and right side sills 14, 14 and the floor tunnel 24 extend in the vehicle length direction FR. It is separated and joined. Each of the floor cross members 11 and 12 has a hat-like cross section, and a closed cross section extending in the vehicle width direction W is defined in the inside. The floor cross members 11 and 12 serve as mounting bases for left and right front seats (not shown).

さらに、フロアクロスメンバー１２の後方のフロアパネル２の下面には、図１に示すように、左右のフロアサイドメンバー１０，１０間に車幅方向Ｗに延びるリアフロアクロスメンバー１３が接合されている。リアフロアクロスメンバー１３は逆ハット状断面を有し、両側フランジ部においてフロアパネル２の下面に溶接接合され、その内部に車幅方向Ｗに延びる閉断面が画成されている。   Furthermore, as shown in FIG. 1, a rear floor cross member 13 extending in the vehicle width direction W is joined between the left and right floor side members 10, 10 on the lower surface of the floor panel 2 behind the floor cross member 12. The rear floor cross member 13 has a reverse hat-like cross section and is welded to the lower surface of the floor panel 2 at the flanges on both sides, and a closed cross section extending in the vehicle width direction W is defined therein.

なお、フロアパネル２の高位面２３には、バッテリパック３のサービスプラグ３６にアクセスするための開口部２３６が設けられている。サービスプラグ３６は、点検時や非常時にバッテリモジュール３０の電力遮断する電源回路の遮断装置である。   An opening 236 for accessing the service plug 36 of the battery pack 3 is provided on the high-order surface 23 of the floor panel 2. The service plug 36 is a shutoff device of a power supply circuit that shuts off the power of the battery module 30 at the time of inspection or in an emergency.

（バッテリパックおよびその支持構造）
バッテリパック３は、図３に示すように、多数のバッテリモジュール３０がホルダ３２に保持され、電源ケーブルなどが配索された状態で、アッパケース３３、ロアケース３４からなるバッテリケースに収容され、周囲のフランジ部３５で接合され密封されることによって構成されている。 (Battery pack and its supporting structure)
As shown in FIG. 3, the battery pack 3 is housed in a battery case formed of an upper case 33 and a lower case 34 in a state where a large number of battery modules 30 are held by a holder 32 and power cables and the like are wired. It is constituted by being joined and sealed by flange part 35 of a.

アッパケース３３およびロアケース３４は、金属板のプレス成形品または樹脂成形品によりシェル状に形成されており、周囲のフランジ部３５でシール材を介して接合されることにより、バッテリパック３内部の防水性、気密性が確保されている。バッテリパック３の下部（ロアケース３４側）には、バッテリパック３の支持枠となるサポートフレーム４が固定されている。   The upper case 33 and the lower case 34 are formed in a shell shape with a press-formed product or a resin-formed product of a metal plate, and are joined with the surrounding flange portion 35 via a sealing material to waterproof the inside of the battery pack 3 Sex and airtightness are secured. A support frame 4 serving as a support frame for the battery pack 3 is fixed to the lower portion (lower case 34 side) of the battery pack 3.

サポートフレーム４は、図１に示すように、ロアケース３４の両側部に沿って車長方向ＦＲに延びる左右一対のサイドフレーム４０，４０と、それらの間に車幅方向Ｗに延びる４つのクロスフレーム４１，４２，４３，４４とを備え、各クロスフレーム４１，４２，４３，４４の両端がサイドフレーム４０，４０に溶接等で剛結合され一体化されることによって構成されている。   As shown in FIG. 1, the support frame 4 is a pair of left and right side frames 40, 40 extending in the vehicle length direction FR along both sides of the lower case 34, and four cross frames extending in the vehicle width direction W therebetween. The cross frames 41, 42, 43, 44 are configured by being rigidly coupled and integrated with the side frames 40, 40 by welding or the like.

サポートフレーム４には、車体側への取付け部として、左右各側に４つの支持部材４５，４６，４７，４８が設けられている。すなわち、サイドフレーム４０，４０の前端部から左右一対の支持部材２５，２５が前方に延設され、クロスフレーム４２，４３，４４の各接合に隣接した左右のサイドフレーム４０，４０の側面に支持部材４６，４７，４８が接合されている。これらの支持部材４５，４６，４７，４８は、バッテリパック３（ロアケース３４）のフランジ部３５にも接合されている。   The support frame 4 is provided with four support members 45, 46, 47, 48 on the left and right sides as attachment parts to the vehicle body side. That is, the left and right support members 25 are extended forward from the front end of the side frames 40, and supported by the side surfaces of the left and right side frames 40 adjacent to each joint of the cross frames 42, 43, 44 The members 46, 47, 48 are joined. These support members 45, 46, 47, 48 are also joined to the flange portion 35 of the battery pack 3 (lower case 34).

上記のようなサポートフレーム４の支持部材４５，４６，４７，４８に対応して、車体側の取付け部としてブラケット２５，２６，２７，２８が設けられている。ブラケット２５，２６，２７，２８は、図１および図２に示すように、左右のフロアサイドメンバー１０，１０の車幅方向Ｗ中央側に隣接して左右対称に設けられ、ブラケット２５はフロアパネル２の低位面２１に接合され、ブラケット２６，２７，２８はフロアパネル２の高位面２３の下側に接合されており、これらのうち、ブラケット２６は、フロアクロスメンバー１２の位置で接合されている。   Brackets 25, 26, 27, 28 are provided as mounting portions on the vehicle body side corresponding to the support members 45, 46, 47, 48 of the support frame 4 as described above. As shown in FIGS. 1 and 2, the brackets 25, 26, 27, 28 are symmetrically provided adjacent to the center side of the left and right floor side members 10, 10 in the vehicle width direction W, and the brackets 25 are floor panels And the brackets 26, 27, 28 are joined to the lower side of the high level surface 23 of the floor panel 2, and among them, the brackets 26 are joined at the position of the floor cross member 12 There is.

各ブラケット２５，２６，２７，２８の固定点Ｆ１〜Ｆ４には、ボルト孔が穿設され、その下面視における裏面側となる上側にウエルドナットが固定されており、サポートフレーム４を備えたバッテリパック３は、リフトアップされるかまたはピット上に位置した車体の下方から、フロアパネル２の高位面２３の下側に画成された搭載空間２０に収容され、不図示のボルトを前記ウエルドナットに締結することにより、車体に固定される。   Bolt holes are bored at fixing points F1 to F4 of the respective brackets 25, 26, 27, 28 and weld nuts are fixed on the upper side to be the back side in the bottom view, and the battery provided with the support frame 4 The pack 3 is housed in the mounting space 20 defined under the high level surface 23 of the floor panel 2 from the lower side of the vehicle body lifted up or positioned on the pit, and a bolt (not shown) is mounted on the weld nut It is fixed to the car body by fastening it to the

（バッテリパック上面とフロアパネルの結合構造）
上記の計８箇所の固定点Ｆ１〜Ｆ４におけるボルトとウエルドナットの締結により、バッテリパック３は、設計上十分な支持強度で車体に懸架されるが、本発明に係る車体構造では、フロアパネル２の振動剛性を高めるために、バッテリパック３の上面（アッパシェル３１）が、面方向に離散的に配設された６箇所の締結部Ｐ１，Ｐ２，Ｐ３においてフロアパネル２（高位面２３）に結合されている。 (Connection structure of battery pack top and floor panel)
The battery pack 3 is suspended on the vehicle body with sufficient support strength in design by the fastening of bolts and weld nuts at a total of eight fixing points F1 to F4 described above, but in the vehicle body structure according to the present invention, the floor panel 2 The upper surface (upper shell 31) of the battery pack 3 is coupled to the floor panel 2 (high surface 23) at six fastening portions P1, P2 and P3 discretely disposed in the surface direction in order to enhance the vibration rigidity of the It is done.

図４は一方の締結部Ｐ１を示しており、図示のように、フロアパネル２の高位面２３には、締結面２３ａが凹設され、換言すれば、フロアパネル２の高位面２３に凹部（２３ａ）が形成されその底面にボルト孔が穿設されることで締結面２３ａが構成されている。   FIG. 4 shows one fastening portion P1, and as shown in the figure, a fastening surface 23a is recessed on the high-level surface 23 of the floor panel 2, in other words, a recess on the high-level surface 23 of the floor panel 2 A fastening surface 23a is formed by forming a bolt hole 23a) and forming a bolt hole on the bottom surface thereof.

この凹部（２３ａ）は下面視においては截頭円錐状の凸部となっており、バッテリパック３のアッパシェル３３には、この凸部（締結面２３ａ）を受容可能な相補的な截頭円錐状をなす凹部（３３ａ）が形成されており、その底面（締結面３３ａ）にスタッドボルト３３ｂが突設されている。   The recess (23a) is a frusto-conical protrusion in a bottom view, and the upper shell 33 of the battery pack 3 has a complementary frusto-conical shape capable of receiving the protrusion (fastening surface 23a) A recess (33a) is formed, and a stud bolt 33b is provided in a projecting manner on the bottom surface (fastening surface 33a).

バッテリパック３の車体への取付けに際して、スタッドボルト３３ｂには、リング状のシール材３３ｓ（シールゴム）が外嵌された金属製のカラー３３ｃが嵌合される。カラー３３ｃは、シール材３３ｓよりも硬質な弾性体や樹脂材など金属以外で構成されたものを用いることもできる。シール材３３ｓの厚さは、自然状態でカラー３３ｃの厚さよりも大きく、図４に示すように、スタッドボルト３３ｂがフロアパネル２の締結面２３ａのボルト孔に下方から挿通され、ワッシャ―２３ｃを介してナット２３ｂがスタッドボルト３３ｂに締結されることで、シール材３３ｓおよびカラー３３ｃを介して、バッテリパック３の締結面３３ａとフロアパネル２の締結面２３ａとが締結固定され、この状態で、カラー３３ｃとの厚さの差の分だけシール材３３ｓが圧縮され、予圧される。他の締結部Ｐ２，Ｐ３も基本的に同構造である。   When the battery pack 3 is attached to the vehicle body, a metal collar 33c on which a ring-shaped seal member 33s (seal rubber) is externally fitted is fitted to the stud bolt 33b. The collar 33c may be made of an elastic body harder than the sealing material 33s, a resin material or the like other than metal. The thickness of the sealing member 33s is larger than the thickness of the collar 33c in the natural state, and as shown in FIG. 4, the stud bolt 33b is inserted from below into the bolt hole of the fastening surface 23a of the floor panel 2, and the washer 23c is By fastening the nut 23b to the stud bolt 33b, the fastening surface 33a of the battery pack 3 and the fastening surface 23a of the floor panel 2 are fastened and fixed via the seal member 33s and the collar 33c. The sealing material 33s is compressed and preloaded by the difference in thickness from the collar 33c. The other fastening portions P2 and P3 basically have the same structure.

上記のようなバッテリパック上面（３３）とフロアパネル（２，２３）の締結部Ｐ１，Ｐ２，Ｐ３の結合構造により、バッテリパック３の箱体（シェル構造）としての剛性および固定点Ｆ１〜Ｆ４による支持剛性を利用して、フロアパネル２の振動が抑制され、フロア下の広範囲にバッテリパック３の搭載空間２０を確保しつつ、フロアパネル２の振動剛性を確保するうえで有利である。   By the joint structure of the battery pack upper surface (33) and the fastening portions P1, P2, P3 of the floor panel (2, 23) as described above, rigidity and fixing points F1 to F4 of the battery pack 3 as a box (shell structure) Vibration of the floor panel 2 is suppressed by utilizing the support rigidity by the above, and it is advantageous in securing the vibration rigidity of the floor panel 2 while securing the mounting space 20 of the battery pack 3 in a wide area under the floor.

フロアパネル２の高位面２３に形成された凹部にフロア側の締結面２３ａが配設されることで、締結面２３ａの凹部の立体形状による局所剛性が付与され、この構成によってもフロアパネル２の振動剛性の確保に有利である。また、凹部（２３ａ）内でスタッドボルト３３ｂにナット２３ｂが締結され、スタッドボルト３３ｂの上端がフロアパネル２の一般面から突出することがない。   By arranging the fastening surface 23a on the floor side in the recess formed in the high-order surface 23 of the floor panel 2, local rigidity is given due to the three-dimensional shape of the recess in the fastening surface 23a. It is advantageous for securing vibration rigidity. Further, the nut 23b is fastened to the stud bolt 33b in the recess (23a), and the upper end of the stud bolt 33b does not protrude from the general surface of the floor panel 2.

さらに、バッテリパック３の上面（アッパシェル３３）に形成された凹部にバッテリパック側の締結面３３ａが配設されることで、締結部Ｐ１，Ｐ２，Ｐ３の局所剛性が向上し、フロアパネル２の振動剛性の確保に有利であることに加えて、フロアパネル２の一般面から突出しない締結部Ｐ１，Ｐ２，Ｐ３を構成しつつも、バッテリパック上面（３３）とフロアパネル（２，２３）との間隔を最小限に留めることができる。   Furthermore, the fastening surface 33a on the battery pack side is disposed in the recess formed in the upper surface (upper shell 33) of the battery pack 3, whereby the local rigidity of the fastening portions P1, P2, P3 is improved. In addition to being advantageous for securing vibration rigidity, the battery pack upper surface (33) and the floor panel (2, 23) and the fastening portions P1, P2 and P3 which do not protrude from the general surface of the floor panel 2 Interval can be kept to a minimum.

この際、カラー３３ｃは、シール材３３ｓの予圧を調整してシール性を最適化する機能を果たすとともに、シール材３３ｓ（およびカラー３３ｃ）の硬さを調整することにより共鳴振動周波数を調整でき、この構成もフロアパネル２の振動剛性の確保に有利である。   At this time, the collar 33c functions to optimize the sealing performance by adjusting the preload of the sealing member 33s, and can adjust the resonance vibration frequency by adjusting the hardness of the sealing member 33s (and the collar 33c), This configuration is also advantageous for securing the vibration rigidity of the floor panel 2.

なお、上記実施形態では、締結部Ｐ１，Ｐ２，Ｐ３が、バッテリパック３の上面に溶接されたスタッドボルト３３ｂと、該スタッドボルトに締結されたナット２３ｂで構成される場合を示したが、各締結部Ｐ１，Ｐ２，Ｐ３は、バッテリパック３の上面に溶接されたウエルドナットと、締結面２３ａのボルト孔に上方から挿通されて前記ウエルドナットに締結されるボルトで構成することもできる。   In the above embodiment, the fastening portions P1, P2 and P3 are each composed of the stud bolt 33b welded to the upper surface of the battery pack 3 and the nut 23b fastened to the stud bolt. The fastening portions P1, P2 and P3 can also be configured by a weld nut welded to the upper surface of the battery pack 3 and a bolt inserted from above into the bolt hole of the fastening surface 23a and fastened to the weld nut.

この場合、ウエルドナットは、バッテリパック３の上面（３３）側に溶接されるか、または、バッテリパック３の上面（３３）を貫通する孔の裏面側（下面側）に溶接されても良く、前者の場合、ウエルドナットの周囲にカラーおよびシール材が設けられるか、カラーを兼ねたウエルドナットにシール材が嵌着されるように構成することもできる。後者の場合は、バッテリパック３の上面側にカラー（およびシール材）が位置決めされる段差などが形成されることが好ましい。   In this case, the weld nut may be welded to the upper surface (33) side of the battery pack 3, or may be welded to the back surface side (lower surface side) of the hole penetrating the upper surface (33) of the battery pack 3. In the former case, a collar and a seal material may be provided around the weld nut, or the seal material may be fitted to the weld nut which also serves as the collar. In the latter case, it is preferable that a step or the like in which the collar (and the seal material) is positioned is formed on the upper surface side of the battery pack 3.

また、上記実施形態では、左右各側に３カ所の締結部Ｐ１，Ｐ２，Ｐ３が設けられる場合を示したが、締結部Ｐ３またはＰ２を省略して左右各側２箇所とすることもできる。何れの場合にも、左右各側の締結部Ｐ１，Ｐ２，Ｐ３は、車両後方に向かいフロアトンネル２４との間隔が拡大するように平面視において左右対称に配設され、かつ、斜めに配列されることが好ましい。   Moreover, although the case where three fastening parts P1, P2, P3 were provided in each left and right side was shown in the said embodiment, the fastening part P3 or P2 can be abbreviate | omitted and it can also be set as two left and right sides. In any case, the fastening portions P1, P2 and P3 on the left and right sides are symmetrically disposed in left and right symmetry in plan view so that the distance between the vehicle and the floor tunnel 24 may be extended toward the rear of the vehicle, and may be arranged obliquely. Is preferred.

このような締結部Ｐ１，Ｐ２，Ｐ３の配置は、車両後方に向かいフロアトンネル２４との間隔が拡大するように平面視において斜めに配設された左右のフロアサイドメンバー１０，１０の配置や、各フロアサイドメンバー１０，１０とフロアトンネル２４との間に設定される高位面２３や段差面２２と整合した配置となり、振動剛性の向上に有利である。   The arrangement of the fastening portions P1, P2 and P3 is the arrangement of the left and right floor side members 10 and 10 disposed obliquely in plan view so that the distance between the vehicle and the floor tunnel 24 increases toward the rear of the vehicle, This arrangement is in alignment with the high level surface 23 and the step surface 22 set between the floor side members 10, 10 and the floor tunnel 24, which is advantageous for improving the vibration rigidity.

以上、本発明の実施の形態について述べたが、本発明は上記実施形態に限定されるものではなく、本発明の技術的思想に基づいてさらに各種の変形および変更が可能である。   As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, Based on the technical idea of this invention, various deformation | transformation and change are possible further.

１ 電動車両
２ フロアパネル
３ バッテリパック
４ サポートフレーム
１０ フロアサイドメンバー
１１ フロアクロスメンバー
１２ フロアクロスメンバー
１３ リアフロアクロスメンバー
１４ サイドシル
２０ 空間
２１ 低位面
２２ 段差面
２３ 高位面
２３ａ 締結面
２３ｂ ナット（締結部材）
２３ｃ ワッシャ―
２４ フロアトンネル
２５，２６，２７，２８ ブラケット
３０ バッテリモジュール
３１ インナカバー
３２ ホルダ
３３ アッパシェル（上面）
３３ａ 締結面（底面）
３３ｂ スタッドボルト（締結部材）
３３ｃ カラー
３３ｓ シール材
３４ ロアシェル
３５ フランジ部
４０ サイドフレーム
４１，４２，４３，４４ クロスフレーム
４５，４６，４７，４８ 支持部材
Ｆ１，Ｆ２，Ｆ３，Ｆ４ 固定部（結合点）
Ｐ１，Ｐ２，Ｐ３ 締結部 Reference Signs List 1 electric vehicle 2 floor panel 3 battery pack 4 support frame 10 floor side member 11 floor cross member 12 floor cross member 13 rear floor cross member 14 side sill 20 space 21 lower surface 22 stepped surface 23 high surface 23 a fastening surface 23 b nut (fastening member)
23c Washer
24 floor tunnel 25, 26, 27, 28 bracket 30 battery module 31 inner cover 32 holder 33 upper shell (upper surface)
33a Fastening surface (bottom)
33b Stud bolt (fastening member)
33c Color 33s Sealing Material 34 Lower Shell 35 Flange Part 40 Side Frame 41, 42, 43, 44 Cross Frame 45, 46, 47, 48 Support Member F1, F2, F3, F4 Fixing Part (Joining Point)
P1, P2, P3 fastening part

Claims (6)

バッテリモジュールを収納したバッテリパックが、その両側部に車長方向に離間して配設された複数の支持部在により、フロアパネルの下側に離間して支持され、
前記バッテリパックの上面が、その面方向に離散的に配設された複数の締結部で前記フロアパネルに結合されている、電動車両の車体構造。 The battery pack containing the battery module is separated and supported on the lower side of the floor panel by the presence of a plurality of supporting portions arranged on both sides at a distance in the vehicle length direction.
A vehicle body structure of an electric vehicle, wherein an upper surface of the battery pack is coupled to the floor panel by a plurality of fastening portions discretely disposed in the surface direction. 前記各締結部は、前記フロアパネルに個別に凹設された締結面を貫通するボルト孔を通して締結されるボルト／ナットであって、
前記バッテリパックの上面に溶接されたスタッドボルトまたはウエルドナットと、
前記ボルト孔に下方から挿通された前記スタッドボルトに締結されるナットまたは前記ボルト孔に上方から挿通されて前記ウエルドナットに締結されるボルトと、を含み、
前記各締結部の上端は、前記フロアパネルの一般面より低位置にある、請求項１に記載の電動車両の車体構造。 Each of the fastening portions is a bolt / nut that is fastened through a bolt hole penetrating a fastening surface individually recessed in the floor panel,
A stud bolt or a weld nut welded to the top surface of the battery pack;
A nut fastened to the stud bolt inserted from below into the bolt hole or a bolt inserted from above into the bolt hole and fastened to the weld nut;
The vehicle body structure of the electric vehicle according to claim 1, wherein the upper end of each of the fastening portions is at a lower position than a general surface of the floor panel. 前記各締結部における前記バッテリパックの上面に、前記フロアパネルの前記締結面を受容可能な凹部が設けられている、請求項２に記載の電動車両の車体構造。   The vehicle body structure of the electric vehicle according to claim 2, wherein a recess capable of receiving the fastening surface of the floor panel is provided on the upper surface of the battery pack in each fastening portion. 前記バッテリパックの前記凹部の底面と、前記フロアパネルの前記締結面との間に、前記ボルト孔の周囲を封止するシール材が介設されている、請求項３に記載の電動車両の車体構造。   The vehicle body of the electric vehicle according to claim 3, wherein a sealing material for sealing the periphery of the bolt hole is interposed between the bottom surface of the recess of the battery pack and the fastening surface of the floor panel. Construction. 前記フロアパネルの下面に車長方向に延びる左右のフロアサイドメンバーが接合され、かつ、前記フロアパネルの前記左右のフロアサイドメンバーの間に高位面が形成され、その下側に前記バッテリパックの少なくとも上部が収容される空間が画成されており、前記各支持部材は、前記左右のフロアサイドメンバーの車幅方向中央側に沿って配設され、前記各締結面は、前記高位面に凹設されている、請求項１〜４の何れか一項に記載の電動車両の車体構造。   Left and right floor side members extending in the vehicle length direction are joined to the lower surface of the floor panel, and a high-level surface is formed between the left and right floor side members of the floor panel. A space in which the upper portion is accommodated is defined, and the support members are disposed along the center in the vehicle width direction of the left and right floor side members, and the fastening surfaces are recessed in the high-level surface The vehicle body structure of the electric vehicle according to any one of claims 1 to 4, wherein 前記フロアパネルの車幅方向中央に車長方向に延びるフロアトンネルが形成され、かつ、前記左右のフロアサイドメンバーは、車両後方に向かい前記フロアトンネルとの間隔が拡大するように平面視において斜めに配設されており、前記左右各側の複数の締結部は、車両後方に向かい前記フロアトンネルとの間隔が拡大するように配設されている、請求項５に記載の電動車両の車体構造。   A floor tunnel extending in the vehicle length direction is formed at the center of the floor panel in the vehicle width direction, and the left and right floor side members are inclined in a plan view so that the distance with the floor tunnel is expanded toward the rear of the vehicle. The vehicle body structure of the electric vehicle according to claim 5, wherein the plurality of fastening portions disposed on the left and right sides are disposed toward the rear of the vehicle so as to increase a distance from the floor tunnel.
JP2018004914A 2018-01-16 2018-01-16 Body structure of electric vehicle Active JP7198422B2 (en)

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JP2018004914A JP7198422B2 (en) 2018-01-16 2018-01-16 Body structure of electric vehicle
DE102019100748.8A DE102019100748A1 (en) 2018-01-16 2019-01-14 Vehicle body structure of an electric vehicle
FR1900329A FR3076796B1 (en) 2018-01-16 2019-01-14 ELECTRIC VEHICLE BODY STRUCTURE
CN201910040105.2A CN110040179B (en) 2018-01-16 2019-01-16 Vehicle body structure of electric vehicle

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JP2021041783A (en) * 2019-09-10 2021-03-18 株式会社神戸製鋼所 Battery case for electric vehicle
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