JP2017218036A - Protective structure of battery pack - Google Patents

Protective structure of battery pack Download PDF

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Publication number
JP2017218036A
JP2017218036A JP2016114419A JP2016114419A JP2017218036A JP 2017218036 A JP2017218036 A JP 2017218036A JP 2016114419 A JP2016114419 A JP 2016114419A JP 2016114419 A JP2016114419 A JP 2016114419A JP 2017218036 A JP2017218036 A JP 2017218036A
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Prior art keywords
battery pack
instrument panel
high voltage
pair
vehicle
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JP2016114419A
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JP6753156B2 (en
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弘二 瀧澤
Koji Takizawa
弘二 瀧澤
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Suzuki Motor Corp
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Suzuki Motor Corp
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Priority to JP2016114419A priority Critical patent/JP6753156B2/en
Priority to DE102017105080.9A priority patent/DE102017105080A1/en
Priority to FR1754897A priority patent/FR3052414B1/en
Priority to CN201710414510.7A priority patent/CN107471990B/en
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    • 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
    • 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
    • B60K2001/0427—Arrangement between the seats
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a protective structure of a battery pack which does not affect function of the battery pack.SOLUTION: A protective structure of a battery pack comprises: a battery pack 7 which is located forward from between left ans right sheets 2, 3; a high voltage cable 10 which is wired in the front of the battery pack 7; a fitting component 19 provided on a component which is provided on a front side of the battery pack 7 and is extended upward from a floor; and a pair of protective components C which are provided on the fitting component 19 and are extended rearward along a side face of the battery pack 7. The pair of protective components C is provided to a position, at which the protective components cover a part of the side face of the battery pack 7, beyond a position of an active part E of the battery pack 7.SELECTED DRAWING: Figure 9

Description

本発明は、電動車両の電池パックの保護構造に関する。   The present invention relates to a battery pack protection structure for an electric vehicle.

周知のように近年では、エンジンとモータの併用で走行するハイブリッド自動車、モータのみで走行する電気自動車、あるいは燃料電池によってモータを駆動する燃料電池車両等が普及し始めており、このような車両では、エンジンと共に、あるいはエンジンに変えて駆動用のモータがエンジンルーム等に搭載されている。
駆動用のモータをエンジンルーム等に搭載した車両では、モータを駆動するための電源となるバッテリー等の電池パックを車室内に搭載する電動車両が知られている。このような電動車両において、モータを駆動するための電池パックを左右のフロントシート相互間のセンターコンソール部に搭載する技術（特許文献１参照）が知られている。 As is well known, in recent years, hybrid vehicles that run using a combination of an engine and a motor, electric vehicles that run using only a motor, fuel cell vehicles that drive a motor by a fuel cell, and the like have begun to spread. A drive motor is mounted in an engine room or the like together with or in place of the engine.
As a vehicle having a driving motor mounted in an engine room or the like, an electric vehicle in which a battery pack such as a battery serving as a power source for driving the motor is mounted in the vehicle interior is known. In such an electric vehicle, a technique (see Patent Document 1) in which a battery pack for driving a motor is mounted on a center console portion between left and right front seats is known.

特開２０１３−１１２１３７号公報JP 2013-112137 A

しかしながら、車両に対する衝撃荷重が側面から加わった際に電池パックの左右に配置されているシートが車体の左右方向に動く恐れがあり、このシートの動きによって電池パックに接続されている活電部のワイヤーハーネス等のケーブルがシートによって荷重を受け、電池パックの機能に影響を及ぼす恐れがあった。   However, when the impact load on the vehicle is applied from the side, the seats arranged on the left and right sides of the battery pack may move in the left-right direction of the vehicle body, and the movement of the seat causes the live parts connected to the battery pack to move. A cable such as a wire harness is subjected to a load by the sheet, which may affect the function of the battery pack.

本発明は、上記課題を解決し、側面からの衝撃荷重に対して電池パックの機能に影響を及ぼすことがない電池パックの保護構造を提供することを目的とする。   An object of the present invention is to solve the above-mentioned problems and to provide a battery pack protection structure that does not affect the function of the battery pack against impact loads from the side surfaces.

本発明は、上記課題を解決するため、左右のシート間から前方に向けて配置された電池パックと、前記電池パックの前方に配索された高電圧ケーブルと、前記電池パックの前方側に設けられ、かつ、フロアから上方に延出された部材に設けられた取付部材と、この取付部材に設けられ、前記電池パックの側面に沿って後方に延出された一対の保護部材とを備え、この一対の保護部材が、前記電池パックの活電部の位置を越えて前記電池パックの側面の一部を覆う位置まで配設されていることにある。   In order to solve the above-described problems, the present invention provides a battery pack arranged forward from the left and right seats, a high-voltage cable arranged in front of the battery pack, and a front side of the battery pack. And an attachment member provided on a member extending upward from the floor, and a pair of protection members provided on the attachment member and extending rearward along the side surface of the battery pack, The pair of protective members are disposed to a position that covers a part of the side surface of the battery pack beyond the position of the live part of the battery pack.

車両側面からの衝撃荷重に対して電池パックの活電部を一対の保護部材によって保護することができる。保護部材によって横方向からの耐衝撃性が向上する。   The live part of the battery pack can be protected against a shock load from the side of the vehicle by a pair of protective members. The impact resistance from the lateral direction is improved by the protective member.

本発明の実施の形態による電池パックの取付構造を示す車室内電池パックの背面図である。It is a rear view of the vehicle interior battery pack showing the battery pack mounting structure according to the embodiment of the present invention. 図１の電池パック搭載状態を示す電池パック後方からの斜視図である。It is a perspective view from the battery pack back which shows the battery pack mounting state of FIG. 図１の電池パック搭載状態を示す電池パックの正面図である。It is a front view of the battery pack which shows the battery pack mounting state of FIG. 図１の電池パック搭載状態を示す電池パックの左側面図である。It is a left view of the battery pack which shows the battery pack mounting state of FIG. 図４のシートを外して示す電池パックの左側面図である。It is a left view of the battery pack which removes and shows the sheet | seat of FIG. 図１の電池パック搭載状態を示す電池パックの平面図である。It is a top view of the battery pack which shows the battery pack mounting state of FIG. 図６の電池パック結線とインパネブラケットガードを示す平面図である。It is a top view which shows the battery pack connection and instrument panel bracket guard of FIG. 図７のインパネブラケットとインパネブラケットガードを示す電池パックの左側面図である。It is a left view of the battery pack which shows the instrument panel bracket and instrument panel bracket guard of FIG. 図８の斜め上方から見た斜視図である。It is the perspective view seen from diagonally upward of FIG.

以下、本発明の実施の形態を、図面を参照しながら詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１ないし図９は電動車両のモータを駆動するための電池パックの取付構造を示したもので、これら図１ないし図９において、１は車室内前部に設けられたインストルメントパネルである。２、３は、インストルメントパネル１に向かって車幅方向に並べて設けられた運転席用フロントシートと助手席用フロントシートである。これらフロントシート２，３はフロアパネル４にスライドレール５を介して車体の前後方向にスライド可能に配設されている。   FIGS. 1 to 9 show a battery pack mounting structure for driving a motor of an electric vehicle. In FIGS. 1 to 9, reference numeral 1 denotes an instrument panel provided in the front part of the vehicle interior. Reference numerals 2 and 3 denote a driver seat front seat and a passenger seat front seat arranged side by side in the vehicle width direction toward the instrument panel 1. The front seats 2 and 3 are arranged on the floor panel 4 via a slide rail 5 so as to be slidable in the front-rear direction of the vehicle body.

図４および図７に示すように、前記フロントシート２，３相互間にはインストルメントパネル１に向けてセンターコンソールボックス６が設けられており、このセンターコンソールボックス６の内側には電池パック７が配設されている。この電池パック７は、フロントシート２，３の間から前方にかけてのフロアパネル４に、車体の前後方向に沿って取り付けられている。この電池パック７は、インストルメントパネル１の中央部下部側に車幅方向に一定間隔で設けられた一対のステー８に上端部が連結されたインストルメントパネルブラケット９によって前端部の両側面７ａが支持されている。前記ステー８と前記インストルメントパネルブラケット９は、連結兼取付部材１９によって連結されており、この連結兼取付部材１９に設けられた２個の取付孔にボルト１９ａ、１９ｂおよびナット（図示せず）を介して前記ステー８と前記インストルメントパネルブラケット９が連結兼取付部材１９に連結されている。
前記一対のステー８は、下方向に向けて垂下されており、この一対のステー８にそれぞれ連結兼取付部材１９を介してインストルメントパネルブラケット９が垂下されている。これら一対のインストルメントパネルブラケット９は、フロアから上方に延出されており、上端部を、前記連結兼取付部材１９を介して前記ステー８に取り付けられ、下端部がフロアパネル等の車体の一部に固定されている。
これら一対のインストルメントパネルブラケット９は、電池パック７の幅寸法に合うように一定幅Ｌに装着されており、これら一対のインストルメントパネルブラケット９をガイドにして電池パック７がその間に組み付けられている。 As shown in FIGS. 4 and 7, a center console box 6 is provided between the front seats 2 and 3 toward the instrument panel 1, and a battery pack 7 is placed inside the center console box 6. It is arranged. The battery pack 7 is attached to the floor panel 4 from the front seats 2 and 3 to the front along the front-rear direction of the vehicle body. This battery pack 7 has both side surfaces 7a at the front end portion thereof by an instrument panel bracket 9 having upper end portions connected to a pair of stays 8 provided at regular intervals in the vehicle width direction on the lower side of the center portion of the instrument panel 1. It is supported. The stay 8 and the instrument panel bracket 9 are connected by a connecting / attaching member 19, and bolts 19 a, 19 b and nuts (not shown) are provided in two attaching holes provided in the connecting / attaching member 19. The stay 8 and the instrument panel bracket 9 are connected to a connecting / attaching member 19 via the connection.
The pair of stays 8 are suspended downward, and an instrument panel bracket 9 is suspended from the pair of stays 8 via connection and attachment members 19. The pair of instrument panel brackets 9 extends upward from the floor, and has an upper end portion attached to the stay 8 via the connection / attachment member 19 and a lower end portion of a vehicle body such as a floor panel. It is fixed to the part.
The pair of instrument panel brackets 9 are mounted with a constant width L so as to match the width dimension of the battery pack 7, and the battery pack 7 is assembled between the pair of instrument panel brackets 9 using the pair of instrument panel brackets 9 as a guide. Yes.

前記電池パック７の前端部には、２本の高電圧ケーブル１０がコネクタ部１０ａを介して接続されている。これら電池パック７の前方に配索された２本の高電圧ケーブル１０はエンジンルーム１１内のモータに接続されている。前記コネクタ部１０ａからなる活電部Ｅは、前記電池パック７の前方で、かつ上方部分に設けられている。前記センターコンソールボックス６は、前記コネクタ部１０ａの電池パック７との電気的な接続作業を可能にするため、コネクタ部１０ａから後方に側壁部６ａが設けられ（図５参照）、上面を露出するように側壁部６ａから後方位置に上部壁面６ｂが設けられている（図７参照）。
図５に示すように、エンジンルーム１１と車室内１２は、前記インストルメントパネル１の前方に設けられたダッシュパネル１３により仕切られており、このダッシュパネル１３に形成された図示しない開口部を通して前記高電圧ケーブル１０がエンジンルーム１１内のモータ（図示せず）に接続されている。 Two high voltage cables 10 are connected to the front end portion of the battery pack 7 via a connector portion 10a. Two high voltage cables 10 routed in front of these battery packs 7 are connected to a motor in the engine room 11. The live part E composed of the connector part 10a is provided in front of the battery pack 7 and in an upper part. The center console box 6 is provided with a side wall portion 6a behind the connector portion 10a (see FIG. 5) to expose the upper surface so that the connector portion 10a can be electrically connected to the battery pack 7. Thus, an upper wall surface 6b is provided at a rear position from the side wall 6a (see FIG. 7).
As shown in FIG. 5, the engine room 11 and the vehicle compartment 12 are partitioned by a dash panel 13 provided in front of the instrument panel 1, and the opening is formed through an opening (not shown) formed in the dash panel 13. A high voltage cable 10 is connected to a motor (not shown) in the engine room 11.

前記ステー８とインストルメントパネルブラケット９を連結した連結兼取付部材１９には、前記高電圧ケーブル１０および高電圧ケーブル１０の電池パック７とのコネクタ部１０ａ、すなわち活電部Ｅを側方から遮蔽する保護部材Ｃとしてのインストルメントパネルブラケットガード１４が設けられている。前記活電部Ｅは電池パック７の前部に設けられている。これらインストルメントパネルブラケットガード１４は、前端部を前記ステー８とインストルメントパネルブラケット９を連結した前記連結兼取付部材１９にボルト１９ａ、１９ｂおよびナットを介して共締めにより固定されて支持されている。前記インストルメントパネルブラケットガード１４は、電池パック７の側面形状に沿うように後端側を車両後方に延出させて、活電部Ｅを越えて電池パック７の側面の一部を覆うように側方から遮蔽して覆っている。前記一対のインストルメントパネルブラケット９およびインストルメントパネルブラケットガード１４の外側には、活電部Ｅとともに、全体を覆うカバー１５が設けられている。このカバー１５の一部を覆うようにして前記センターコンソールボックス６が組み付けられている。 The connecting and mounting member 19 that connects the stay 8 and the instrument panel bracket 9 shields the connector portion 10a of the high voltage cable 10 and the battery pack 7 of the high voltage cable 10, that is, the live portion E from the side. An instrument panel bracket guard 14 is provided as a protective member C. The live part E is provided in the front part of the battery pack 7. These instrument panel bracket guards 14 are supported by being fastened together with bolts 19a, 19b and nuts to the connecting and mounting member 19 connecting the stay 8 and the instrument panel bracket 9 at the front end. . The instrument panel bracket guard 14 extends the rear end side toward the rear of the vehicle along the side shape of the battery pack 7 so as to cover a part of the side surface of the battery pack 7 beyond the live part E. Covered from the side. On the outside of the pair of instrument panel brackets 9 and the instrument panel bracket guard 14, a cover 15 is provided to cover the whole together with the live part E. The center console box 6 is assembled so as to cover a part of the cover 15.

前記電池パックの保護構造によれば、側面からの衝撃荷重に対して前記フロントシート２，３が車体前方に移動した場合、電池パック７に接続された高電圧ケーブル１０のコネクタ部１０ａは、保護部材Ｃとしてのインストルメントパネルブラケットガード１４によって側方が覆われているので、高電圧ケーブル１０のコネクタ部１０ａに側方からの衝撃を防ぐことができる。また、前記フロントシート２，３が前方に移動しても直接、高電圧ケーブル１０のコネクタ部１０ａに接触することはない。保護部材Ｃとしてのインストルメントパネルブラケットガード１４は、高電圧ケーブル１０のコネクタ部１０ａを越えて電池パック７の前端部の側面の一部を覆う位置まで、車体の後方に延びているので、高電圧ケーブル１０に対しても側方からの衝撃が高電圧ケーブル１０のコネクタ部１０ａに加わる虞がない。また、前記フロントシート２，３が前方に移動しても高電圧ケーブル１０のコネクタ部１０ａに直接、接触することはない。したがって、高電圧ケーブル１０のコネクタ部１０ａあるいは、高電圧ケーブル１０などの活電部Ｅに側方からの衝撃が直接加わる虞がない。さらに、前記活電部Ｅは、前記電池パック７の前方で、かつ上方に設けられているので、センターコンソールボックス６で覆われていない部分をインストルメントパネルブラケットガード１４で保護することができる。また、横方向、すなわち側方からの衝撃で、電池パック７が車両幅方向に押し出された場合に活電部Ｅに負荷がかからないようにすることで保護することができる。さらに、保護部材Ｃとしてのインストルメントパネルブラケットガード１４によって横方向からの耐衝撃性が向上する。またさらに、保護部材Ｃとしてのインストルメントパネルブラケットガード１４がガイドとなり、電池パック７の組付け性が向上する。 According to the protection structure of the battery pack, when the front seats 2 and 3 move forward of the vehicle body against an impact load from the side, the connector portion 10a of the high voltage cable 10 connected to the battery pack 7 is protected. Since the side is covered with the instrument panel bracket guard 14 as the member C, it is possible to prevent an impact from the side on the connector portion 10a of the high voltage cable 10. Even if the front seats 2 and 3 move forward, they do not directly contact the connector portion 10a of the high voltage cable 10. Since the instrument panel bracket guard 14 as the protective member C extends beyond the connector portion 10a of the high voltage cable 10 to a position covering a part of the side surface of the front end portion of the battery pack 7, There is no possibility that the impact from the side of the voltage cable 10 is applied to the connector portion 10a of the high voltage cable 10. Even if the front seats 2 and 3 move forward, they do not directly contact the connector portion 10a of the high voltage cable 10. Therefore, there is no possibility that the impact from the side is directly applied to the connector part 10a of the high voltage cable 10 or the live part E such as the high voltage cable 10. Furthermore, since the live part E is provided in front of and above the battery pack 7, a portion not covered by the center console box 6 can be protected by the instrument panel bracket guard 14. Further, when the battery pack 7 is pushed out in the vehicle width direction due to an impact from the side, that is, from the side, it can be protected by preventing the live part E from being loaded. Furthermore, the impact resistance from the lateral direction is improved by the instrument panel bracket guard 14 as the protective member C. Furthermore, the instrument panel bracket guard 14 as the protective member C serves as a guide, and the assembling property of the battery pack 7 is improved.

本発明は、前記実施の形態のみに限定されるものではなく、例えば、保護部材Ｃとなるインストルメントパネルブラケットガード１４は、インストルメントパネルブラケット９と別体に成形されているが、インストルメントパネルブラケット９の一部を大きく形成して、この一体成形部分を保護部材Ｃに利用することもできる。また、前記実施の形態では、フロントシート相互間に電池パック７を配置したが、リヤシ−ト相互間に配置してもよい。さらに、シート相互間に配置される部分は、電池パック７として説明したが、インバータなどの高電圧制御部も含まれることは言うまでもない。さらに、モータと電池パック７を備えた車両であれば、ハイブリッド車両、電気自動車、燃料電池車両等種々の車両に適用することができる。その他、発明の技術的範囲を変更しない範囲内で適宜変更して実施し得ることは言うまでもない。 The present invention is not limited to the embodiment described above. For example, the instrument panel bracket guard 14 serving as the protection member C is formed separately from the instrument panel bracket 9. A part of the bracket 9 can be formed large, and this integrally molded portion can be used as the protective member C. Moreover, in the said embodiment, although the battery pack 7 was arrange | positioned between front seats, you may arrange | position between retreats. Furthermore, although the part arrange | positioned between sheets demonstrated as the battery pack 7, it cannot be overemphasized that a high voltage control part, such as an inverter, is also included. Furthermore, any vehicle including a motor and a battery pack 7 can be applied to various vehicles such as a hybrid vehicle, an electric vehicle, and a fuel cell vehicle. In addition, it goes without saying that the present invention can be implemented with appropriate modifications within the scope not changing the technical scope of the invention.

１ インストルメントパネル
２ 運転席用フロントシート
３ 助手席用フロントシート
４ フロアパネル
５ スライドレール
６ センターコンソールボックス
７ 電池パック
９ インストルメントパネルブラケット
１０ 高電圧ケーブル
１０ａ コネクタ部
１１ エンジンルーム
１２ 車室内
１３ ダッシュパネル
１４ インストルメントパネルブラケットガード（保護部材Ｃ）
１９ 連結兼取付部材（取付部材）
Ｅ 活電部 DESCRIPTION OF SYMBOLS 1 Instrument panel 2 Driver seat front seat 3 Passenger seat front seat 4 Floor panel 5 Slide rail 6 Center console box 7 Battery pack 9 Instrument panel bracket 10 High voltage cable 10a Connector part 11 Engine room 12 Car interior 13 Dash panel 14 Instrument panel bracket guard (Protective member C)
19 Connecting and mounting member (Mounting member)
E Live electricity department

Claims (3)

左右のシート間から前方に向けて配置された電池パックと、前記電池パックの前方に配索された高電圧ケーブルと、前記電池パックの前方側に設けられ、かつ、フロアから上方に延出された部材に設けられた取付部材と、この取付部材に設けられ、前記電池パックの側面に沿って後方に延出された一対の保護部材とを備え、この一対の保護部材が、前記電池パックの活電部の位置を越えて前記電池パックの側面の一部を覆う位置まで配設されていることを特徴とする電池パックの取付構造。 A battery pack disposed forwardly from between the left and right seats, a high voltage cable routed in front of the battery pack, provided on the front side of the battery pack, and extended upward from the floor An attachment member provided on the member, and a pair of protection members provided on the attachment member and extending rearward along the side surface of the battery pack. A battery pack mounting structure, wherein the battery pack mounting structure is disposed up to a position that covers a part of the side surface of the battery pack beyond the position of the live part. 前記活電部は、前記電池パックの前部に設けられていることを特徴とする請求項１に記載の電池パックの取付構造。 The battery pack mounting structure according to claim 1, wherein the live part is provided in a front part of the battery pack. 前記保護部材は、前記電池パックの側面形状に沿うように車両後方に延出されていることを特徴とする請求項１に記載の電池パックの取付構造。 The battery pack mounting structure according to claim 1, wherein the protection member extends rearward of the vehicle so as to follow a side shape of the battery pack.
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DE102017105080.9A DE102017105080A1 (en) 2016-06-08 2017-03-10 Protective structure for battery pack
FR1754897A FR3052414B1 (en) 2016-06-08 2017-06-02 PROTECTIVE STRUCTURE FOR BATTERY PACK
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CN107471990A (en) 2017-12-15
JP6753156B2 (en) 2020-09-09

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