JP6939909B2 - Power storage module - Google Patents

Power storage module Download PDF

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JP6939909B2
JP6939909B2 JP2019567857A JP2019567857A JP6939909B2 JP 6939909 B2 JP6939909 B2 JP 6939909B2 JP 2019567857 A JP2019567857 A JP 2019567857A JP 2019567857 A JP2019567857 A JP 2019567857A JP 6939909 B2 JP6939909 B2 JP 6939909B2
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printed circuit
flexible printed
main body
circuit board
body portion
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JPWO2019146197A1 (en
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伊藤　智之
智之 伊藤
悟士 山本
悟士 山本
洋明 加藤
洋明 加藤
卓矢 山本
卓矢 山本
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Toyota Industries Corp
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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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/14—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • 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

Description

本発明の一側面は、蓄電モジュールに関する。 One aspect of the present invention relates to a power storage module.

配列された複数の蓄電セルに接続されたフレキシブルプリント基板（ＦＰＣ）を備える蓄電モジュールが知られている（例えば特許文献１）。このフレキシブルプリント基板は、蓄電セルの上面上に載置されており、電子制御ユニット（ＥＣＵ）に接続されている。 A power storage module including a flexible printed circuit board (FPC) connected to a plurality of arranged power storage cells is known (for example, Patent Document 1). This flexible printed circuit board is placed on the upper surface of the power storage cell and is connected to an electronic control unit (ECU).

特開２０１３−８０６２０号公報Japanese Unexamined Patent Publication No. 2013-80620

蓄電セルの上面に、蓄電セル内のガスを放出するための安全弁が設けられる場合、蓄電セルの上面上に、安全弁を覆う排煙ダクトが設けられる。この場合、例えばフレキシブル基板を排煙ダクトの上面上に載置することが考えられる。しかしながら、その場合、蓄電モジュール全体の高さが高くなる。 When a safety valve for discharging the gas in the storage cell is provided on the upper surface of the storage cell, a smoke exhaust duct covering the safety valve is provided on the upper surface of the storage cell. In this case, for example, it is conceivable to place the flexible substrate on the upper surface of the smoke exhaust duct. However, in that case, the height of the entire power storage module becomes high.

本発明の一側面は、高さの低い蓄電モジュールを提供することを目的とする。 One aspect of the present invention is to provide a power storage module having a low height.

本発明の一側面に係る蓄電モジュールは、安全弁をそれぞれ有し、配列された複数の蓄電セルと、前記複数の蓄電セルの配列方向に延在する第１及び第２の側面と、前記第１の側面と前記第２の側面との間に配置された上面と、を有し、前記安全弁を覆う排煙ダクトと、前記複数の蓄電セルに接続され、前記排煙ダクトの前記第１及び第２の側面上にそれぞれ設けられた第１及び第２のフレキシブルプリント基板と、を備える。 The power storage module according to one aspect of the present invention has a safety valve, a plurality of power storage cells arranged therein, first and second side surfaces extending in the arrangement direction of the plurality of power storage cells, and the first side. A smoke exhaust duct covering the safety valve and a smoke exhaust duct connected to the plurality of storage cells, the first and first smoke exhaust ducts having an upper surface arranged between the side surface and the second side surface. It includes first and second flexible printed substrates provided on the side surfaces of the two, respectively.

上記蓄電モジュールによれば、排煙ダクトの両側面上にフレキシブルプリント基板がそれぞれ設けられているので、排煙ダクトの上面上にフレキシブルプリント基板を設ける場合に比べて、蓄電モジュールの高さを低くすることができる。 According to the above-mentioned power storage module, since the flexible printed circuit boards are provided on both side surfaces of the smoke exhaust duct, the height of the power storage module is lowered as compared with the case where the flexible printed circuit boards are provided on the upper surface of the smoke exhaust duct. can do.

前記第１及び第２のフレキシブルプリント基板には、第１及び第２のヒューズがそれぞれ実装されており、前記第１のヒューズは、前記複数の蓄電セルのうちの１つの蓄電セルの正極端子に電気的に接続され、前記第２のヒューズは、前記１つの蓄電セルの負極端子に電気的に接続されてもよい。この場合、第１のヒューズと第２のヒューズとが互いに離間して配置されるので、各ヒューズと各端子との間に位置する導線間において短絡の発生を抑制することができる。 The first and second fuses are mounted on the first and second flexible printed circuit boards, respectively, and the first fuse is attached to the positive electrode terminal of one of the plurality of storage cells. Electrically connected, the second fuse may be electrically connected to the negative electrode terminal of the one storage cell. In this case, since the first fuse and the second fuse are arranged apart from each other, it is possible to suppress the occurrence of a short circuit between the conducting wires located between each fuse and each terminal.

前記第１及び第２のフレキシブルプリント基板は、前記第１及び第２の側面にそれぞれ保持される第１及び第２の本体部を有しており、前記第１及び第２のヒューズは、前記第１及び第２の本体部にそれぞれ実装されてもよい。この場合、各フレキシブルプリント基板の本体部は、排煙ダクトの各側面に保持されるので、外力が加えられても折れ曲がり難い。よって、当該本体部に実装される各ヒューズに応力が掛かることを抑制できる。 The first and second flexible printed circuit boards have first and second main body portions held on the first and second side surfaces, respectively, and the first and second fuses are said. It may be mounted on the first and second main bodies, respectively. In this case, since the main body of each flexible printed circuit board is held on each side surface of the smoke exhaust duct, it is difficult to bend even if an external force is applied. Therefore, it is possible to prevent stress from being applied to each fuse mounted on the main body.

前記排煙ダクトは、前記第１及び第２の側面の下端からそれぞれ外側に広がる第１及び第２の底板を有しており、前記第１のフレキシブルプリント基板は、前記第１の側面に沿って延在する第１の本体部と、前記第１の本体部の下端から前記第１の底板に沿って外側に広がる第１の屈曲部と、を有し、前記第２のフレキシブルプリント基板は、前記第２の側面に沿って延在する第２の本体部と、前記第２の本体部の下端から前記第２の底板に沿って外側に広がる第２の屈曲部と、を有してもよい。これにより、各フレキシブルプリント基板の幅が大きい場合であっても、各フレキシブルプリント基板が屈曲部を有するので、本体部の幅を小さくすることができる。その結果、蓄電モジュールの高さを更に低くすることができる。 The smoke exhaust duct has first and second bottom plates extending outward from the lower ends of the first and second side surfaces, respectively, and the first flexible printed circuit board is along the first side surface. The second flexible printed circuit board has a first main body portion extending from the lower end of the first main body portion and a first bent portion extending outward along the first bottom plate. A second main body portion extending along the second side surface, and a second bent portion extending outward along the second bottom plate from the lower end of the second main body portion. May be good. As a result, even when the width of each flexible printed circuit board is large, the width of the main body portion can be reduced because each flexible printed circuit board has a bent portion. As a result, the height of the power storage module can be further reduced.

前記第１のフレキシブルプリント基板は、前記第１の側面に沿って延在する第１の本体部と、前記第１の本体部から分岐する複数の第１の分岐部と、を有しており、前記複数の第１の分岐部のそれぞれは、前記配列方向に延在する前記第１のフレキシブルプリント基板の一部を折り曲げられた部分であり、前記第１の側面に交差する方向に延在し、前記第２のフレキシブルプリント基板は、前記第２の側面に沿って延在する第２の本体部と、前記第２の本体部から分岐する複数の第２の分岐部と、を有しており、前記複数の第２の分岐部のそれぞれは、前記配列方向に延在する前記第２のフレキシブルプリント基板の一部を折り曲げられた部分であり、前記第２の側面に交差する方向に延在してもよい。各フレキシブルプリント基板において、例えば分岐部が引っ張られることによって分岐部と本体部との間に応力が発生することがある。分岐部が側面に交差する方向に延在していると、応力は主に配列方向に発生する。よって、分岐部と本体部との間に、応力により配列方向に裂け目が形成されたとしても、分岐部と本体部との間においてフレキシブルプリント基板が破断し難い。 The first flexible printed circuit board has a first main body portion extending along the first side surface, and a plurality of first branch portions branching from the first main body portion. Each of the plurality of first branch portions is a bent portion of the first flexible printed circuit board extending in the arrangement direction, and extends in a direction intersecting the first side surface. However, the second flexible printed circuit board has a second main body portion extending along the second side surface, and a plurality of second branch portions branching from the second main body portion. Each of the plurality of second branch portions is a bent portion of the second flexible printed circuit board extending in the arrangement direction, and is in a direction intersecting the second side surface. It may be postponed. In each flexible printed circuit board, stress may be generated between the branch portion and the main body portion, for example, by pulling the branch portion. When the bifurcation extends in the direction intersecting the side surface, the stress is mainly generated in the arrangement direction. Therefore, even if a rift is formed between the branch portion and the main body portion in the arrangement direction due to stress, the flexible printed circuit board is unlikely to break between the branch portion and the main body portion.

本発明の一側面によれば、高さの低い蓄電モジュールが提供され得る。 According to one aspect of the present invention, a storage module having a low height can be provided.

一実施形態に係る蓄電モジュールを模式的に示す平面図である。It is a top view which shows typically the power storage module which concerns on one Embodiment. 図１のＩＩ−ＩＩ線に沿った断面図である。It is sectional drawing along the line II-II of FIG. 図１の蓄電モジュールの一部を模式的に示す斜視図である。It is a perspective view which shows a part of the power storage module of FIG. 1 schematically.

以下、添付図面を参照しながら本発明の実施形態が詳細に説明される。図面の説明において、同一又は同等の要素には同一符号が用いられ、重複する説明は省略される。図面にはＸＹＺ直交座標系が示される。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used for the same or equivalent elements, and duplicate description is omitted. The drawing shows the XYZ Cartesian coordinate system.

図１は、一実施形態に係る蓄電モジュールを模式的に示す平面図である。図２は、図１のＩＩ−ＩＩ線に沿った断面図（ＸＺ断面図）である。図３は、図１の蓄電モジュールの一部を模式的に示す斜視図である。図１〜図３に示されるように、蓄電モジュール１は、配列体２と、弾性部材３と、拘束部材４と、排煙ダクト５と、第１のフレキシブルプリント基板６と、第２のフレキシブルプリント基板７とを備え得る。 FIG. 1 is a plan view schematically showing a power storage module according to an embodiment. FIG. 2 is a cross-sectional view (XZ cross-sectional view) taken along the line II-II of FIG. FIG. 3 is a perspective view schematically showing a part of the power storage module of FIG. As shown in FIGS. 1 to 3, the power storage module 1 includes an array 2, an elastic member 3, a restraint member 4, a smoke exhaust duct 5, a first flexible printed circuit board 6, and a second flexible. It may include a printed circuit board 7.

蓄電モジュール１は、例えばフォークリフト、ハイブリッド自動車、電気自動車等の各種車両のバッテリとして用いられる。蓄電モジュール１は、例えばリチウムイオン二次電池等の非水電解質二次電池であるが、電気二重層キャパシタであってもよい。 The power storage module 1 is used as a battery for various vehicles such as forklifts, hybrid vehicles, and electric vehicles. The power storage module 1 is a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery, but may be an electric double layer capacitor.

配列体２は、配列された複数（本実施形態では７つ）の蓄電セル１１を備える。各蓄電セル１１は、例えば矩形箱状のケース内に電極組立体が収容された単電池である。複数の蓄電セル１１は、配列方向Ｄ（Ｙ方向）に配列されている。各蓄電セル１１は、樹脂製のセルホルダ（不図示）に保持される。蓄電セル１１の上面１１ｄには、正極端子１１ａ及び負極端子１１ｂが互いに離間して設けられている。正極端子１１ａは、電極組立体の正極に接続された電極端子であり、負極端子１１ｂは、電極組立体の負極に接続された電極端子である。隣り合う蓄電セル１１は、正極端子１１ａと負極端子１１ｂとが互いに隣り合うように配列され、隣り合う正極端子１１ａと負極端子１１ｂとがバスバー１２によって互いに電気的に接続されている。これにより、隣り合う蓄電セル１１が電気的に直列に接続されている。正極端子１１ａ及び負極端子１１ｂは、ボルトによってバスバー１２に接続されてもよいし、溶接によってバスバー１２に接続されてもよい。蓄電セル１１の配列方向Ｄにおいて、一端の蓄電セル１１の負極端子１１ｂ及び他端の蓄電セル１１の正極端子１１ａには、例えば板状の導電部材である外部接続端子１３がそれぞれ接続されている。 The array 2 includes a plurality of (7 in this embodiment) storage cells 11 arranged. Each storage cell 11 is, for example, a cell cell in which an electrode assembly is housed in a rectangular box-shaped case. The plurality of storage cells 11 are arranged in the arrangement direction D (Y direction). Each storage cell 11 is held in a resin cell holder (not shown). A positive electrode terminal 11a and a negative electrode terminal 11b are provided on the upper surface 11d of the power storage cell 11 so as to be separated from each other. The positive electrode terminal 11a is an electrode terminal connected to the positive electrode of the electrode assembly, and the negative electrode terminal 11b is an electrode terminal connected to the negative electrode of the electrode assembly. In the adjacent storage cells 11, the positive electrode terminals 11a and the negative electrode terminals 11b are arranged so as to be adjacent to each other, and the adjacent positive electrode terminals 11a and the negative electrode terminals 11b are electrically connected to each other by the bus bar 12. As a result, the adjacent storage cells 11 are electrically connected in series. The positive electrode terminal 11a and the negative electrode terminal 11b may be connected to the bus bar 12 by bolts or may be connected to the bus bar 12 by welding. In the arrangement direction D of the storage cell 11, for example, an external connection terminal 13 which is a plate-shaped conductive member is connected to the negative electrode terminal 11b of the storage cell 11 at one end and the positive electrode terminal 11a of the storage cell 11 at the other end. ..

各蓄電セル１１は、安全弁１１ｃを有している。安全弁１１ｃは、例えば蓄電セル１１の上面１１ｄに設けられる。安全弁１１ｃは、蓄電セル１１内のガス圧力が予め定められた値を超えた場合にガスを外部に放出する。安全弁１１ｃは、蓄電セル１１の上面１１ｄにおいて、正極端子１１ａと負極端子１１ｂとの間に配置される。よって、複数の安全弁１１ｃが配列方向Ｄに沿って配列される。 Each power storage cell 11 has a safety valve 11c. The safety valve 11c is provided, for example, on the upper surface 11d of the power storage cell 11. The safety valve 11c releases gas to the outside when the gas pressure in the storage cell 11 exceeds a predetermined value. The safety valve 11c is arranged between the positive electrode terminal 11a and the negative electrode terminal 11b on the upper surface 11d of the power storage cell 11. Therefore, the plurality of safety valves 11c are arranged along the arrangement direction D.

弾性部材３は、蓄電セル１１の配列方向Ｄにおいて、配列体２の一端に配置されている。弾性部材３は、拘束荷重による蓄電セル１１の破損を防止する目的で用いられる部材であり、例えばウレタン製のゴムスポンジから構成されている。弾性部材３は、矩形の板状部材である。弾性部材３の材料としては、例えばエチレンプロピレンジエンゴム（ＥＰＤＭ）、クロロプレンゴム、及びシリコーンゴム等が挙げられる。弾性部材３は、ゴムに限られず、バネ材等であってもよい。弾性部材３は、配列方向Ｄにおける配列体２の両端に配置されていてもよく、互いに隣り合う蓄電セル１１，１１間に配置されていてもよい。 The elastic member 3 is arranged at one end of the array body 2 in the array direction D of the storage cell 11. The elastic member 3 is a member used for the purpose of preventing damage to the power storage cell 11 due to a restraining load, and is made of, for example, a urethane rubber sponge. The elastic member 3 is a rectangular plate-shaped member. Examples of the material of the elastic member 3 include ethylene propylene diene rubber (EPDM), chloroprene rubber, and silicone rubber. The elastic member 3 is not limited to rubber, and may be a spring material or the like. The elastic members 3 may be arranged at both ends of the array body 2 in the arrangement direction D, or may be arranged between the storage cells 11 and 11 adjacent to each other.

拘束部材４は、配列体２に対して配列方向Ｄに拘束荷重を付加するための部材である。拘束部材４は、一対のエンドプレート４１と、複数の連結部材４２と、を備えている。一対のエンドプレート４１は、配列体２を配列方向Ｄの両側から挟持するための部材である。エンドプレート４１は、鉄等の金属材料からなる板状部材である。 The restraint member 4 is a member for applying a restraint load to the array body 2 in the arrangement direction D. The restraint member 4 includes a pair of end plates 41 and a plurality of connecting members 42. The pair of end plates 41 are members for sandwiching the array 2 from both sides in the array direction D. The end plate 41 is a plate-shaped member made of a metal material such as iron.

連結部材４２は、一対のエンドプレート４１同士を連結する。連結部材４２は、例えば鉄等の金属から構成されたボルト及びナットによって構成されている。各連結部材４２のボルトは、一方のエンドプレート４１の挿通孔、各セルホルダの挿通孔、及び他方のエンドプレート４１の挿通孔に順次挿通され、他方のエンドプレート４１の外側でナットにより締結されている。この締結によって配列体２に対して配列方向Ｄに拘束荷重が付加される。 The connecting member 42 connects the pair of end plates 41 to each other. The connecting member 42 is composed of bolts and nuts made of a metal such as iron. The bolts of each connecting member 42 are sequentially inserted into the insertion holes of one end plate 41, the insertion holes of each cell holder, and the insertion holes of the other end plate 41, and are fastened with nuts on the outside of the other end plate 41. There is. By this fastening, a restraining load is applied to the array body 2 in the array direction D.

排煙ダクト５は、安全弁１１ｃを覆う。排煙ダクト５は、正極端子１１ａと負極端子１１ｂとの間に配置され得る。排煙ダクト５は、例えば樹脂製の部材である。排煙ダクト５は、第１の側面５１ａを有する側板５１と、第２の側面５２ａを有する側板５２と、上面５３ａを有する上板５３とを有する。側面５１ａ，５２ａ及び上面５３ａは、配列方向Ｄに延在している。上板５３は、安全弁１１ｃと対向配置される。安全弁１１ｃから放出されるガスは、排煙ダクト５の側板５１，５２及び上板５３と、蓄電セル１１の上面１１ｄとによって囲まれる空間を通って外部に排出される。蓄電セル１１の上面１１ｄから排煙ダクト５の上面５３ａまでの高さは、蓄電セル１１の上面１１ｄからバスバー１２の上面１２ａまでの高さと同じであるかそれよりも低い。排煙ダクト５の上面５３ａ上には、蓄電セル１１を覆うカバー（不図示）が設けられている。配列方向Ｄに直交する排煙ダクト５の断面（図２の断面）における空間領域は、例えば矩形状であるが、上面５３ａから蓄電セル１１の上面１１ｄに向かうに連れて幅が広がる台形状であってもよい。排煙ダクト５は、側面５１ａの下端から空間領域の外側に広がる第１の底板５４と、側面５２ａの下端から空間領域の外側に広がる第２の底板５５とを有してもよい。底板５４，５５は、それぞれ側板５１，５２と交差する方向（例えばＸ方向）に延在し、蓄電セル１１の上面１１ｄ上に載置される。底板５４，５５によって、排煙ダクト５は、蓄電セル１１の上面１１ｄ上に安定して載置され得る。 The smoke exhaust duct 5 covers the safety valve 11c. The smoke exhaust duct 5 may be arranged between the positive electrode terminal 11a and the negative electrode terminal 11b. The smoke exhaust duct 5 is, for example, a member made of resin. The smoke exhaust duct 5 has a side plate 51 having a first side surface 51a, a side plate 52 having a second side surface 52a, and an upper plate 53 having an upper surface 53a. The side surfaces 51a and 52a and the upper surface 53a extend in the arrangement direction D. The upper plate 53 is arranged to face the safety valve 11c. The gas released from the safety valve 11c is discharged to the outside through a space surrounded by the side plates 51 and 52 and the upper plate 53 of the smoke exhaust duct 5 and the upper surface 11d of the storage cell 11. The height from the upper surface 11d of the storage cell 11 to the upper surface 53a of the smoke exhaust duct 5 is the same as or lower than the height from the upper surface 11d of the storage cell 11 to the upper surface 12a of the bus bar 12. A cover (not shown) covering the power storage cell 11 is provided on the upper surface 53a of the smoke exhaust duct 5. The spatial region in the cross section (cross section of FIG. 2) of the smoke exhaust duct 5 orthogonal to the arrangement direction D is, for example, rectangular, but has a trapezoidal shape whose width increases from the upper surface 53a toward the upper surface 11d of the storage cell 11. There may be. The smoke exhaust duct 5 may have a first bottom plate 54 extending from the lower end of the side surface 51a to the outside of the space area, and a second bottom plate 55 extending from the lower end of the side surface 52a to the outside of the space area. The bottom plates 54 and 55 extend in directions intersecting the side plates 51 and 52 (for example, the X direction), respectively, and are placed on the upper surface 11d of the power storage cell 11. The bottom plates 54 and 55 allow the smoke exhaust duct 5 to be stably placed on the upper surface 11d of the storage cell 11.

フレキシブルプリント基板６は、排煙ダクト５の側面５１ａ上に設けられ、複数の蓄電セル１１に接続される。フレキシブルプリント基板６は、側面５１ａに保持される第１の本体部６１と、本体部６１から分岐する複数の第１の分岐部６２とを有する。本体部６１は、側面５１ａに沿って延在するフィルム部である。本体部６１は例えば接着剤等により側面５１ａに固定される。フレキシブルプリント基板６は、本体部６１の下端から底板５４に沿って外側に広がる第１の屈曲部６３を有してもよい。屈曲部６３は例えば接着剤等により底板５４に固定される。各分岐部６２は、側面５１ａから離れる方向（例えば側面５１ａの法線方向（Ｘ方向）等の側面５１ａに交差する方向）に延在するフィルム部である。図３に示されるように、分岐部６２は、配列方向Ｄに延在するフレキシブルプリント基板の一部を切り取って折り曲げられた部分（例えば矩形状部分）である。フレキシブルプリント基板６は、複数の絶縁フィルム間に挟まれた複数（本実施形態では５本）の導線６ａを有している。図１及び図２において導線６ａは図示されていない。各導線６ａは、配列方向Ｄに延在している。分岐部６２の先端において導線６ａは露出しており、例えばリベット接続又は溶接等によってバスバー１２に接続される。分岐部６２の先端は、バスバー１２の上面１２ａに沿うように捩れた状態でバスバー１２に接続される。 The flexible printed circuit board 6 is provided on the side surface 51a of the smoke exhaust duct 5 and is connected to a plurality of storage cells 11. The flexible printed substrate 6 has a first main body portion 61 held on the side surface 51a, and a plurality of first branching portions 62 branching from the main body portion 61. The main body portion 61 is a film portion extending along the side surface 51a. The main body 61 is fixed to the side surface 51a with, for example, an adhesive. The flexible printed circuit board 6 may have a first bent portion 63 extending outward from the lower end of the main body portion 61 along the bottom plate 54. The bent portion 63 is fixed to the bottom plate 54 with, for example, an adhesive. Each branch portion 62 is a film portion extending in a direction away from the side surface 51a (for example, a direction intersecting the side surface 51a such as the normal direction (X direction) of the side surface 51a). As shown in FIG. 3, the branch portion 62 is a portion (for example, a rectangular portion) formed by cutting and bending a part of the flexible printed circuit board extending in the arrangement direction D. The flexible printed circuit board 6 has a plurality of (five in this embodiment) conducting wires 6a sandwiched between the plurality of insulating films. Conductors 6a are not shown in FIGS. 1 and 2. Each conductor 6a extends in the arrangement direction D. The conducting wire 6a is exposed at the tip of the branch portion 62, and is connected to the bus bar 12 by, for example, rivet connection or welding. The tip of the branch portion 62 is connected to the bus bar 12 in a twisted state along the upper surface 12a of the bus bar 12.

本体部６１には、複数の第１のヒューズ８が実装され得る。各ヒューズ８は、本体部６１における当該ヒューズ８が実装される部分において露出した各導線６ａに接続される。ヒューズ８は、分岐部６２の隣に配置される。ヒューズ８は、分岐部６２に実装されてもよい。一部の分岐部６２の先端にはサーミスタ８１が実装され得る。サーミスタ８１は蓄電セル１１の上面１１ｄに例えば接着剤により固定される。サーミスタ８１は、蓄電セル１１の温度を検知する。サーミスタ８１は全ての蓄電セル１１に接続されなくてもよい。ヒューズ８及びサーミスタ８１は、フレキシブルプリント基板６の一方の面のみに実装されてもよい。 A plurality of first fuses 8 may be mounted on the main body 61. Each fuse 8 is connected to each of the conductors 6a exposed in the portion of the main body 61 where the fuse 8 is mounted. The fuse 8 is arranged next to the branch portion 62. The fuse 8 may be mounted on the branch portion 62. A thermistor 81 may be mounted at the tip of some branch portions 62. The thermistor 81 is fixed to the upper surface 11d of the storage cell 11 with, for example, an adhesive. The thermistor 81 detects the temperature of the storage cell 11. The thermistor 81 does not have to be connected to all storage cells 11. The fuse 8 and the thermistor 81 may be mounted on only one surface of the flexible printed circuit board 6.

フレキシブルプリント基板７は、排煙ダクト５の側面５２ａ上に設けられ、複数の蓄電セル１１に接続される。フレキシブルプリント基板７は、側面５２ａに保持される第２の本体部７１と、本体部７１から分岐する複数の第２の分岐部７２とを有する。本体部７１は、側面５２ａに沿って延在するフィルム部である。本体部７１は例えば接着剤等により側面５２ａに固定される。フレキシブルプリント基板７は、本体部７１の下端から底板５５に沿って外側に広がる第２の屈曲部７３を有してもよい。屈曲部７３は例えば接着剤等により底板５５に固定される。各分岐部７２は、側面５２ａから離れる方向（例えば側面５２ａの法線方向（Ｘ方向）等の側面５２ａに交差する方向）に延在するフィルム部である。分岐部７２は、配列方向Ｄに延在するフレキシブルプリント基板の一部を切り取って折り曲げられた部分（例えば矩形状部分）である。フレキシブルプリント基板７は、複数の絶縁フィルム間に挟まれた複数の導線（不図示）を有している。各導線は、配列方向Ｄに延在している。分岐部７２の先端において導線は露出しており、例えばリベット接続又は溶接等によってバスバー１２に接続される。分岐部７２の先端は、バスバー１２の上面１２ａに沿うように捩れた状態でバスバー１２に接続される。 The flexible printed circuit board 7 is provided on the side surface 52a of the smoke exhaust duct 5 and is connected to a plurality of storage cells 11. The flexible printed circuit board 7 has a second main body portion 71 held on the side surface 52a, and a plurality of second branch portions 72 branching from the main body portion 71. The main body portion 71 is a film portion extending along the side surface 52a. The main body 71 is fixed to the side surface 52a with, for example, an adhesive. The flexible printed circuit board 7 may have a second bent portion 73 extending outward from the lower end of the main body portion 71 along the bottom plate 55. The bent portion 73 is fixed to the bottom plate 55 with, for example, an adhesive. Each branch portion 72 is a film portion extending in a direction away from the side surface 52a (for example, a direction intersecting the side surface 52a such as the normal direction (X direction) of the side surface 52a). The branch portion 72 is a portion (for example, a rectangular portion) formed by cutting and bending a part of the flexible printed circuit board extending in the arrangement direction D. The flexible printed circuit board 7 has a plurality of conductors (not shown) sandwiched between the plurality of insulating films. Each conductor extends in the arrangement direction D. The conducting wire is exposed at the tip of the branch portion 72, and is connected to the bus bar 12 by, for example, rivet connection or welding. The tip of the branch portion 72 is connected to the bus bar 12 in a twisted state along the upper surface 12a of the bus bar 12.

本体部７１には、複数の第２のヒューズ９が実装され得る。各ヒューズ９は、本体部７１における当該ヒューズ９が実装される部分において露出した各導線に接続される。ヒューズ９は、分岐部７２の隣に配置される。ヒューズ９は、分岐部７２の隣に配置される。ヒューズ８は、分岐部６２に実装されてもよい。一部の分岐部７２の先端にはサーミスタ９１が実装され得る。サーミスタ９１は蓄電セル１１の上面１１ｄに例えば接着剤により固定される。サーミスタ９１は、蓄電セル１１の温度を検知する。サーミスタ９１は全ての蓄電セル１１に接続されなくてもよい。ヒューズ９及びサーミスタ９１は、フレキシブルプリント基板７の一方の面のみに実装されてもよい。 A plurality of second fuses 9 may be mounted on the main body 71. Each fuse 9 is connected to each of the exposed conductors in the main body 71 where the fuse 9 is mounted. The fuse 9 is arranged next to the branch portion 72. The fuse 9 is arranged next to the branch portion 72. The fuse 8 may be mounted on the branch portion 62. A thermistor 91 may be mounted at the tip of some branch portions 72. The thermistor 91 is fixed to the upper surface 11d of the power storage cell 11 with, for example, an adhesive. The thermistor 91 detects the temperature of the storage cell 11. The thermistor 91 does not have to be connected to all storage cells 11. The fuse 9 and the thermistor 91 may be mounted on only one surface of the flexible printed circuit board 7.

例えば配列方向Ｄにおいて一端に位置する１つの蓄電セル１１では、ヒューズ８が正極端子１１ａに電気的に接続され、ヒューズ９が負極端子１１ｂに電気的に接続される。一方、例えば配列方向Ｄにおいて一端に位置する蓄電セル１１の隣の蓄電セル１１では、ヒューズ８が負極端子１１ｂに電気的に接続され、ヒューズ９が正極端子１１ａに電気的に接続される。全ての蓄電セル１１のそれぞれにヒューズ８，９が接続されている。 For example, in one storage cell 11 located at one end in the arrangement direction D, the fuse 8 is electrically connected to the positive electrode terminal 11a, and the fuse 9 is electrically connected to the negative electrode terminal 11b. On the other hand, for example, in the storage cell 11 next to the storage cell 11 located at one end in the arrangement direction D, the fuse 8 is electrically connected to the negative electrode terminal 11b, and the fuse 9 is electrically connected to the positive electrode terminal 11a. Fuse 8 and 9 are connected to each of all the storage cells 11.

フレキシブルプリント基板６の本体部６１は、監視装置１００のコネクタ１０１に接続される。同様に、フレキシブルプリント基板７の本体部７１は、監視装置１００のコネクタ１０２に接続される。これにより、蓄電セル１１の電圧又は温度に関する信号が、フレキシブルプリント基板６，７を通して監視装置１００に送られる。監視装置１００は、配列方向Ｄにおいて一端に位置するエンドプレート４１の外側に位置する。コネクタ１０１，１０２は、排煙ダクト５の側面５１ａ，５２ａと交差する面に沿って延在しているため、本体部６１，７１は、先端が捩れた状態でコネクタ１０１，１０２にそれぞれ接続される。監視装置１００は、蓄電セル１１の電圧又は温度を監視する監視回路１０３と、監視回路１０３に電力を供給する電源回路１０４とを備える。監視回路１０３は、複数の導線１０１ａによりコネクタ１０１と接続され、複数の導線１０２ａによりコネクタ１０２と接続される。フレキシブルプリント基板６の導線６ａの本数は、導線１０１ａの本数と対応している。同様に、フレキシブルプリント基板７の導線の本数は、導線１０２ａの本数と対応している。監視装置１００は、プリント配線板とプリント配線板に実装された部品（例えば半導体チップ）とから構成され得る。 The main body 61 of the flexible printed circuit board 6 is connected to the connector 101 of the monitoring device 100. Similarly, the main body 71 of the flexible printed circuit board 7 is connected to the connector 102 of the monitoring device 100. As a result, a signal regarding the voltage or temperature of the storage cell 11 is sent to the monitoring device 100 through the flexible printed circuit boards 6 and 7. The monitoring device 100 is located outside the end plate 41 located at one end in the arrangement direction D. Since the connectors 101 and 102 extend along the surfaces intersecting the side surfaces 51a and 52a of the smoke exhaust duct 5, the main bodies 61 and 71 are connected to the connectors 101 and 102 with their tips twisted, respectively. NS. The monitoring device 100 includes a monitoring circuit 103 that monitors the voltage or temperature of the storage cell 11, and a power supply circuit 104 that supplies power to the monitoring circuit 103. The monitoring circuit 103 is connected to the connector 101 by a plurality of conductors 101a, and is connected to the connector 102 by a plurality of conductors 102a. The number of conductors 6a of the flexible printed circuit board 6 corresponds to the number of conductors 101a. Similarly, the number of conductors of the flexible printed circuit board 7 corresponds to the number of conductors 102a. The monitoring device 100 may be composed of a printed wiring board and a component (for example, a semiconductor chip) mounted on the printed wiring board.

ヒューズ８に電気的に接続されるフレキシブルプリント基板６の導線６ａは、蓄電セル１１の電圧に関する信号を監視装置１００に伝達する。同様に、ヒューズ９に電気的に接続されるフレキシブルプリント基板７の導線は、蓄電セル１１の電圧に関する信号を監視装置１００に伝達する。ヒューズ８，９によって、過大電流が監視装置１００とフレキシブルプリント基板６の導線６ａとフレキシブルプリント基板７の導線に流れることが抑制される。ヒューズ８が分岐部６２の隣に配置されることにより、過大電流がヒューズ８よりも監視装置１００側の導線６ａに流れることを抑制できる。その結果、過大電流により、本体部６１のその他の導線６ａに影響を及ぼすことが抑制される。同様に、ヒューズ９が分岐部７２の隣に配置されることにより、過大電流がヒューズ９よりも監視装置１００側の導線に流れることを抑制できる。その結果、過大電流により、本体部７１のその他の導線に影響を及ぼすことが抑制される。また、サーミスタ８１に電気的に接続されるフレキシブルプリント基板６の導線６ａは、蓄電セル１１の温度に関する信号を監視装置１００に伝達する。同様に、サーミスタ９１に電気的に接続されるフレキシブルプリント基板７の導線は、蓄電セル１１の温度に関する信号を監視装置１００に伝達する。これにより、蓄電セル１１の温度を監視することができる。 The lead wire 6a of the flexible printed circuit board 6 electrically connected to the fuse 8 transmits a signal related to the voltage of the storage cell 11 to the monitoring device 100. Similarly, the lead wire of the flexible printed circuit board 7 electrically connected to the fuse 9 transmits a signal regarding the voltage of the storage cell 11 to the monitoring device 100. The fuses 8 and 9 suppress the excessive current from flowing through the conductor 100 of the monitoring device 100, the conductor 6a of the flexible printed circuit board 6, and the conductors of the flexible printed circuit board 7. By arranging the fuse 8 next to the branch portion 62, it is possible to prevent an excessive current from flowing to the conducting wire 6a on the monitoring device 100 side of the fuse 8. As a result, it is suppressed that the excessive current affects the other conductors 6a of the main body 61. Similarly, by arranging the fuse 9 next to the branch portion 72, it is possible to prevent an excessive current from flowing to the conducting wire on the monitoring device 100 side of the fuse 9. As a result, it is possible to suppress the influence of the excessive current on the other conductors of the main body 71. Further, the lead wire 6a of the flexible printed circuit board 6 electrically connected to the thermistor 81 transmits a signal regarding the temperature of the storage cell 11 to the monitoring device 100. Similarly, the conductor of the flexible printed circuit board 7 electrically connected to the thermistor 91 transmits a signal regarding the temperature of the storage cell 11 to the monitoring device 100. Thereby, the temperature of the storage cell 11 can be monitored.

以上説明したように、蓄電モジュール１は、排煙ダクト５の側面５１ａ，５２ａ上にそれぞれ設けられたフレキシブルプリント基板６，７を備える。そのため、排煙ダクト５の上面５３ａ上にフレキシブルプリント基板を設ける必要がない。よって、排煙ダクト５の上面５３ａ上にフレキシブルプリント基板を設ける場合に比べて、蓄電モジュール１の高さを低くすることができる。さらに、排煙ダクト５の上面５３ａと、上面５３ａ上に配置されるカバーとの間のデッドスペースを小さくできる。また、フレキシブルプリント基板６，７は互いに別体なので、フレキシブルプリント基板６とフレキシブルプリント基板７とを互いに離間して配置することができる。そのため、フレキシブルプリント基板６とフレキシブルプリント基板７との間の短絡の発生を抑制することができる。 As described above, the power storage module 1 includes flexible printed circuit boards 6 and 7 provided on the side surfaces 51a and 52a of the smoke exhaust duct 5, respectively. Therefore, it is not necessary to provide a flexible printed circuit board on the upper surface 53a of the smoke exhaust duct 5. Therefore, the height of the power storage module 1 can be lowered as compared with the case where the flexible printed circuit board is provided on the upper surface 53a of the smoke exhaust duct 5. Further, the dead space between the upper surface 53a of the smoke exhaust duct 5 and the cover arranged on the upper surface 53a can be reduced. Further, since the flexible printed circuit boards 6 and 7 are separate from each other, the flexible printed circuit boards 6 and the flexible printed circuit boards 7 can be arranged apart from each other. Therefore, it is possible to suppress the occurrence of a short circuit between the flexible printed circuit board 6 and the flexible printed circuit board 7.

フレキシブルプリント基板６，７にヒューズ８，９がそれぞれ実装されており、１つの蓄電セル１１の正極端子１１ａにヒューズ８が電気的に接続され、当該蓄電セル１１の負極端子１１ｂにヒューズ９が電気的に接続されてもよい。この場合、ヒューズ８とヒューズ９とが互いに離間して配置されるので、ヒューズ８と正極端子１１ａとの間に位置する導線６ａと、ヒューズ９と負極端子１１ｂとの間に位置する導線との間において短絡の発生を抑制することができる。 Fuse 8 and 9 are mounted on the flexible printed circuit boards 6 and 7, respectively, the fuse 8 is electrically connected to the positive electrode terminal 11a of one storage cell 11, and the fuse 9 is electrically connected to the negative electrode terminal 11b of the storage cell 11. May be connected. In this case, since the fuse 8 and the fuse 9 are arranged apart from each other, the conductor 6a located between the fuse 8 and the positive electrode terminal 11a and the conductor wire located between the fuse 9 and the negative electrode terminal 11b It is possible to suppress the occurrence of a short circuit between them.

フレキシブルプリント基板６，７が、側面５１ａ，５２ａにそれぞれ保持される本体部６１，７１を有しており、ヒューズ８，９が本体部６１，７１にそれぞれ実装されてもよい。この場合、フレキシブルプリント基板６，７の本体部６１，７１は、排煙ダクト５の側面５１ａ，５２ａに保持されるので、外力が加えられても折れ曲がり難い。よって、例えば分岐部６２，７２が折れ曲がった場合であっても、本体部６１，７１に実装されるヒューズ８，９に応力が掛かることを抑制できる。また、本体部６１，７１の折れ曲がりが抑制されるので、フレキシブルプリント基板６，７の信頼性が向上する。さらに、フレキシブルプリント基板６，７を排煙ダクト５と一体化できるので、予めフレキシブルプリント基板６，７を排煙ダクト５と一体化した状態で蓄電セル１１上に排煙ダクト５を組み付けることができる。その結果、蓄電モジュール１の製造時の組み付け工程数を低減できる。 The flexible printed circuit boards 6 and 7 have main bodies 61 and 71 held on the side surfaces 51a and 52a, respectively, and the fuses 8 and 9 may be mounted on the main bodies 61 and 71, respectively. In this case, since the main bodies 61 and 71 of the flexible printed circuit boards 6 and 7 are held by the side surfaces 51a and 52a of the smoke exhaust duct 5, they are not easily bent even when an external force is applied. Therefore, for example, even when the branch portions 62 and 72 are bent, it is possible to prevent stress from being applied to the fuses 8 and 9 mounted on the main body portions 61 and 71. Further, since the bending of the main bodies 61 and 71 is suppressed, the reliability of the flexible printed circuit boards 6 and 7 is improved. Further, since the flexible printed circuit boards 6 and 7 can be integrated with the smoke exhaust duct 5, the smoke exhaust duct 5 can be assembled on the storage cell 11 in a state where the flexible printed circuit boards 6 and 7 are integrated with the smoke exhaust duct 5 in advance. can. As a result, the number of assembly steps at the time of manufacturing the power storage module 1 can be reduced.

フレキシブルプリント基板６は、側面５１ａに沿って延在する本体部６１と、本体部６１の下端から底板５４に沿って外側に広がる屈曲部６３とを有してもよい。これにより、フレキシブルプリント基板６の幅（配列方向Ｄに直交する方向の長さ）が大きい場合であっても、フレキシブルプリント基板６が屈曲部６３を有するので、本体部６１の幅を小さくすることができる。その結果、蓄電モジュール１の高さを更に低くすることができる。 The flexible printed circuit board 6 may have a main body portion 61 extending along the side surface 51a and a bent portion 63 extending outward along the bottom plate 54 from the lower end of the main body portion 61. As a result, even when the width of the flexible printed circuit board 6 (the length in the direction orthogonal to the arrangement direction D) is large, since the flexible printed circuit board 6 has the bent portion 63, the width of the main body portion 61 can be reduced. Can be done. As a result, the height of the power storage module 1 can be further reduced.

同様に、フレキシブルプリント基板７は、側面５２ａに沿って延在する本体部７１と、本体部７１の下端から底板５５に沿って外側に広がる屈曲部７３とを有してもよい。フレキシブルプリント基板７においてもフレキシブルプリント基板６と同様の作用効果が得られる。 Similarly, the flexible printed circuit board 7 may have a main body portion 71 extending along the side surface 52a and a bent portion 73 extending outward along the bottom plate 55 from the lower end of the main body portion 71. The same effect as that of the flexible printed circuit board 6 can be obtained in the flexible printed circuit board 7.

フレキシブルプリント基板６は、側面５１ａに沿って延在する本体部６１と、本体部６１から分岐する複数の分岐部６２とを有しており、複数の分岐部６２のそれぞれは、配列方向Ｄに延在するフレキシブルプリント基板６の一部を折り曲げられた部分であり、側面５１ａに交差する方向に延在してもよい。フレキシブルプリント基板６において、例えば次のようなメカニズムで分岐部６２が引っ張られることによって分岐部６２と本体部６１との間に応力が発生することがある。配列方向Ｄは、各蓄電セル１１内の電極組立体を構成する電極板の積層方向と一致するので、蓄電モジュール１の使用時に各蓄電セル１１は配列方向Ｄに膨張する。膨張に伴ってバスバー１２の位置が排煙ダクト５に対して配列方向Ｄにずれるので、バスバー１２に接続された分岐部６２の先端と本体部６１に繋がる分岐部６２の基端との間で配列方向Ｄの位置ずれが生じる。ここで、分岐部６２が側面５１ａに交差する方向に延在していると、応力は主に配列方向Ｄに発生する。よって、分岐部６２と本体部６１との間に、応力により配列方向Ｄに裂け目が形成されたとしても、分岐部６２の基端が本体部６１から分離し難い。したがって、分岐部６２と本体部６１との間においてフレキシブルプリント基板６が破断し難い。一方、排煙ダクト５の上面５３ａにフレキシブルプリント基板を配置して、配列方向Ｄに沿ったフレキシブルプリント基板の本体部から分岐した分岐部をバスバー１２に接続する場合、上面５３ａにおいて、分岐部を配列方向Ｄに直交する方向（Ｘ方向）に折り曲げる。この場合、分岐部は上面５３ａに平行な方向に延在する。蓄電セル１１の膨張によって分岐部の先端と基端との間で配列方向Ｄの位置ずれが生じると、分岐部と本体部との間において、配列方向Ｄ（Ｙ方向）だけでなく分岐部の延在方向（Ｘ方向）にも応力が発生する。これらの応力が合成されると、上面５３ａに平行な平面において、配列方向Ｄ（Ｙ方向）及び分岐部の延在方向（Ｘ方向）のそれぞれに対して４５度の角度をなす方向に応力が発生する。その結果、当該方向に裂け目が形成されるので、分岐部の基端が本体部から分離してフレキシブルプリント基板６が破断し易い。 The flexible printed circuit board 6 has a main body portion 61 extending along the side surface 51a and a plurality of branching portions 62 branching from the main body portion 61, and each of the plurality of branching portions 62 is in the arrangement direction D. A part of the extending flexible printed circuit board 6 is a bent portion, and may extend in a direction intersecting the side surface 51a. In the flexible printed circuit board 6, stress may be generated between the branch portion 62 and the main body portion 61 by pulling the branch portion 62 by, for example, the following mechanism. Since the arrangement direction D coincides with the stacking direction of the electrode plates constituting the electrode assembly in each storage cell 11, each storage cell 11 expands in the arrangement direction D when the power storage module 1 is used. Since the position of the bus bar 12 shifts in the arrangement direction D with respect to the smoke exhaust duct 5 due to the expansion, between the tip of the branch portion 62 connected to the bus bar 12 and the base end of the branch portion 62 connected to the main body portion 61. A misalignment in the arrangement direction D occurs. Here, when the branch portion 62 extends in the direction intersecting the side surface 51a, the stress is mainly generated in the arrangement direction D. Therefore, even if a rift is formed between the branch portion 62 and the main body portion 61 in the arrangement direction D due to stress, the base end of the branch portion 62 is difficult to separate from the main body portion 61. Therefore, the flexible printed circuit board 6 is unlikely to break between the branch portion 62 and the main body portion 61. On the other hand, when the flexible printed circuit board is arranged on the upper surface 53a of the smoke exhaust duct 5 and the branch portion branched from the main body portion of the flexible printed circuit board along the arrangement direction D is connected to the bus bar 12, the branch portion is formed on the upper surface 53a. Bend in the direction orthogonal to the arrangement direction D (X direction). In this case, the branch portion extends in a direction parallel to the upper surface 53a. When the position shift of the arrangement direction D occurs between the tip end and the base end of the branch portion due to the expansion of the storage cell 11, not only the arrangement direction D (Y direction) but also the branch portion is located between the branch portion and the main body portion. Stress is also generated in the extending direction (X direction). When these stresses are combined, the stresses are generated in a plane parallel to the upper surface 53a in a direction forming an angle of 45 degrees with respect to each of the arrangement direction D (Y direction) and the extension direction (X direction) of the branch portion. appear. As a result, a rift is formed in that direction, so that the base end of the branch portion is separated from the main body portion and the flexible printed circuit board 6 is easily broken.

同様に、フレキシブルプリント基板７は、側面５２ａに沿って延在する本体部７１と、本体部７１から分岐する複数の分岐部７２とを有しており、複数の分岐部７２のそれぞれは、配列方向Ｄに延在するフレキシブルプリント基板７の一部を折り曲げられた部分であり、側面５２ａに交差する方向に延在してもよい。フレキシブルプリント基板７においてもフレキシブルプリント基板６と同様の作用効果が得られる。 Similarly, the flexible printed circuit board 7 has a main body portion 71 extending along the side surface 52a and a plurality of branching portions 72 branching from the main body portion 71, and each of the plurality of branching portions 72 is arranged. A part of the flexible printed circuit board 7 extending in the direction D is a bent portion, and may extend in a direction intersecting the side surface 52a. The same effect as that of the flexible printed circuit board 6 can be obtained in the flexible printed circuit board 7.

以上、本発明の好適な実施形態について詳細に説明されたが、本発明は上記実施形態に限定されない。 Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the above embodiment.

１…蓄電モジュール、５…排煙ダクト、６…第１のフレキシブルプリント基板、７…第２のフレキシブルプリント基板、８…第１のヒューズ、９…第２のヒューズ、１１…蓄電セル、１１ａ…正極端子、１１ｂ…負極端子、１１ｃ…安全弁、５１ａ…第１の側面、５２ａ…第２の側面、５３ａ…上面、５４…第１の底板、５５…第２の底板、６１…第１の本体部、６２…第１の分岐部、６３…第１の屈曲部、７１…第２の本体部、７２…第２の分岐部、７３…第２の屈曲部、Ｄ…配列方向。 1 ... power storage module, 5 ... smoke exhaust duct, 6 ... first flexible printed circuit board, 7 ... second flexible printed circuit board, 8 ... first fuse, 9 ... second fuse, 11 ... power storage cell, 11a ... Positive electrode terminal, 11b ... Negative electrode terminal, 11c ... Safety valve, 51a ... First side surface, 52a ... Second side surface, 53a ... Top surface, 54 ... First bottom plate, 55 ... Second bottom plate, 61 ... First main body Part, 62 ... 1st branch portion, 63 ... 1st bent portion, 71 ... 2nd main body portion, 72 ... 2nd branch portion, 73 ... 2nd bent portion, D ... Arrangement direction.

Claims (4)

安全弁をそれぞれ有し、配列された複数の蓄電セルと、
前記複数の蓄電セルの配列方向に延在する第１及び第２の側面と、前記第１の側面と前記第２の側面との間に配置された上面と、を有し、前記安全弁を覆う排煙ダクトと、
前記複数の蓄電セルに接続され、前記排煙ダクトの前記第１及び第２の側面上にそれぞれ設けられた第１及び第２のフレキシブルプリント基板と、
を備え、
前記第１及び第２のフレキシブルプリント基板には、第１及び第２のヒューズがそれぞれ実装されており、
前記第１のヒューズは、前記複数の蓄電セルのうちの１つの蓄電セルの正極端子に電気的に接続され、
前記第２のヒューズは、前記１つの蓄電セルの負極端子に電気的に接続される、蓄電モジュール。 With multiple storage cells arranged, each with a safety valve,
It has first and second side surfaces extending in the arrangement direction of the plurality of storage cells, and an upper surface arranged between the first side surface and the second side surface, and covers the safety valve. Smoke exhaust duct and
A first and second flexible printed circuit board connected to the plurality of storage cells and provided on the first and second side surfaces of the smoke exhaust duct, respectively.
Equipped with a,
The first and second fuses are mounted on the first and second flexible printed circuit boards, respectively.
The first fuse is electrically connected to the positive electrode terminal of one of the plurality of storage cells.
The second fuse is a power storage module that is electrically connected to the negative electrode terminal of the one power storage cell. 前記第１及び第２のフレキシブルプリント基板は、前記第１及び第２の側面にそれぞれ保持される第１及び第２の本体部を有しており、前記第１及び第２のヒューズは、前記第１及び第２の本体部にそれぞれ実装されている、請求項１に記載の蓄電モジュール。 The first and second flexible printed circuit boards have first and second main body portions held on the first and second side surfaces, respectively, and the first and second fuses are said. The power storage module according to claim 1 , which is mounted on each of the first and second main bodies. 前記排煙ダクトは、前記第１及び第２の側面の下端からそれぞれ外側に広がる第１及び第２の底板を有しており、
前記第１のフレキシブルプリント基板は、前記第１の側面に沿って延在する第１の本体部と、前記第１の本体部の下端から前記第１の底板に沿って外側に広がる第１の屈曲部と、を有し、
前記第２のフレキシブルプリント基板は、前記第２の側面に沿って延在する第２の本体部と、前記第２の本体部の下端から前記第２の底板に沿って外側に広がる第２の屈曲部と、を有する、請求項１又は２に記載の蓄電モジュール。 The smoke exhaust duct has first and second bottom plates extending outward from the lower ends of the first and second side surfaces, respectively.
The first flexible printed circuit board has a first main body portion extending along the first side surface and a first main body portion extending outward from the lower end of the first main body portion along the first bottom plate. With a bent part,
The second flexible printed circuit board has a second main body portion extending along the second side surface and a second main body portion extending outward from the lower end of the second main body portion along the second bottom plate. The power storage module according to claim 1 or 2 , further comprising a bent portion. 前記第１のフレキシブルプリント基板は、前記第１の側面に沿って延在する第１の本体部と、前記第１の本体部から分岐する複数の第１の分岐部と、を有しており、
前記複数の第１の分岐部のそれぞれは、前記配列方向に延在する前記第１のフレキシブルプリント基板の一部を折り曲げられた部分であり、前記第１の側面に交差する方向に延在し、
前記第２のフレキシブルプリント基板は、前記第２の側面に沿って延在する第２の本体部と、前記第２の本体部から分岐する複数の第２の分岐部と、を有しており、
前記複数の第２の分岐部のそれぞれは、前記配列方向に延在する前記第２のフレキシブルプリント基板の一部を折り曲げられた部分であり、前記第２の側面に交差する方向に延在する、請求項１〜３のいずれか一項に記載の蓄電モジュール。 The first flexible printed circuit board has a first main body portion extending along the first side surface, and a plurality of first branch portions branching from the first main body portion. ,
Each of the plurality of first branch portions is a bent portion of the first flexible printed circuit board extending in the arrangement direction, and extends in a direction intersecting the first side surface. ,
The second flexible printed circuit board has a second main body portion extending along the second side surface, and a plurality of second branch portions branching from the second main body portion. ,
Each of the plurality of second branch portions is a bent portion of the second flexible printed circuit board extending in the arrangement direction, and extends in a direction intersecting the second side surface. , The power storage module according to any one of claims 1 to 3.
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