JP2009170687A - Electrochemical power storage element module - Google Patents

Electrochemical power storage element module Download PDF

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JP2009170687A
JP2009170687A JP2008007739A JP2008007739A JP2009170687A JP 2009170687 A JP2009170687 A JP 2009170687A JP 2008007739 A JP2008007739 A JP 2008007739A JP 2008007739 A JP2008007739 A JP 2008007739A JP 2009170687 A JP2009170687 A JP 2009170687A
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storage element
electrochemical storage
capacitor
casing
element module
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JP5067171B2 (en
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Ron Horikoshi
論 堀越
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13—Energy storage using capacitors

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrochemical power storage element module capable of improving durability against vibration, and a cooling function. <P>SOLUTION: A plurality of capacitors 2 connected in parallel to one another are arranged side by side on an antivibration mat 3 having plasticity and arranged in a box shape metal housing 1 and on the undersurface 1a of the metal housing 1 in one direction; heat conductive pressurized rubber materials 5 having a heat conduction property are interposed between the capacitors 2 adjacent to each other, and between the capacitors 2 arranged at both ends within the plurality of capacitors 2, and surfaces 1c and 1d of the housing facing the capacitors 2; and, between at least one side of the heat conductive pressurized rubber materials 5 interposed between the capacitors 2 and the metal housing 1, and the metal housing 1, springs 9 pressing the heat conductive pressurized rubber material 5 to restrict the movement of the plurality of capacitors 2 housed in the metal housing 1 are arranged. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、放熱構造を備える電気二重層キャパシタモジュールまたはリチウム電池モジュール等の電気化学蓄電素子モジュールに関する。   The present invention relates to an electrochemical storage element module such as an electric double layer capacitor module or a lithium battery module having a heat dissipation structure.

電気二重層キャパシタ（以後キャパシタと呼称する）は分極性電極に電解質中のアニオン、カチオンを正極、負極表面に物理吸着させて電気を蓄えることを原理としている。このようなキャパシタの電解液は、大別すると有機溶媒系、水系に分けられる。近年、キャパシタの大容量化、大型化が進んでおり、ほとんどのものにキャパシタ充電電圧をより高くすることができ高エネルギー密度化に有利な有機溶媒系の電解液が用いられている。   An electric double layer capacitor (hereinafter referred to as a capacitor) is based on the principle that an anion and a cation in an electrolyte are physically adsorbed on a polarizable electrode on the surface of the positive electrode and the negative electrode to store electricity. The electrolytic solution of such a capacitor is roughly classified into an organic solvent system and an aqueous system. In recent years, capacitors have become larger in capacity and larger in size, and most of them use an organic solvent-based electrolytic solution that can increase the capacitor charging voltage and is advantageous for increasing the energy density.

水系の電解液を用いるキャパシタはセル電圧が１．０Ｖ程度であるのに対し、有機溶媒系の電解液を用いるキャパシタはセル電圧が２．３〜２．７Ｖである。蓄電エネルギーは電圧の二乗に比例するので水系の電解液を用いるキャパシタに対して有機溶媒系の電解液を用いるキャパシタはエネルギー密度の点から有利である。   A capacitor using an aqueous electrolyte has a cell voltage of about 1.0 V, whereas a capacitor using an organic solvent-based electrolyte has a cell voltage of 2.3 to 2.7 V. Since the stored energy is proportional to the square of the voltage, a capacitor using an organic solvent-based electrolyte is more advantageous than a capacitor using an aqueous electrolyte from the viewpoint of energy density.

ただし、有機溶媒系の電解液を用いたキャパシタは極端に水分を嫌う。その理由としては、水分が電解液中に混入すると水の分解電位である１．８Ｖ以上でガスが発生し、フッ酸の発生が起こることが挙げられる。フッ酸が発生すると、キャパシタの構成部材の劣化が進行して耐久性能が低下するおそれがある。また、前記構成部材の劣化が進行して該構成部材が破損すると、キャパシタの外装の内部でガス圧が高まり外装故障を引き起こすおそれがある。   However, capacitors using an organic solvent-based electrolyte extremely dislike moisture. The reason is that when water is mixed in the electrolyte, gas is generated at a decomposition potential of water of 1.8 V or more, and hydrofluoric acid is generated. When hydrofluoric acid is generated, deterioration of the constituent members of the capacitor may occur and durability may be deteriorated. Further, when the component member is further deteriorated and is damaged, the gas pressure is increased inside the capacitor case, which may cause a failure of the case.

従って、従来、キャパシタにあっては製造時において十分な水分進入に対する対策が行われている。また、製造後におけるキャパシタ内部への水分の進入を防止する構造も必要であり、一般的にはキャパシタを金属管へ封入する、又はアルミラミネートフィルム等の金属フィルムで覆う等の構造が用いられている（例えば、特許文献１〜５参照）。   Therefore, conventionally, in the capacitor, measures against sufficient moisture ingress are taken at the time of manufacture. In addition, a structure that prevents the ingress of moisture into the capacitor after manufacturing is also necessary. Generally, a structure in which the capacitor is sealed in a metal tube or covered with a metal film such as an aluminum laminate film is used. (For example, see Patent Documents 1 to 5).

そして、例えば、大型のキャパシタにおいてはキャパシタ全体を大きな密閉管で覆うことはコストおよび信頼性の面で難点があることから、ほとんどのものは金属フィルムで外周を覆うことにより水分の進入を防ぐ構造を採っている。   And, for example, in large capacitors, it is difficult to cover the entire capacitor with a large sealed tube in terms of cost and reliability, so most of them are structured to prevent moisture from entering by covering the outer periphery with a metal film. Is adopted.

特開２００４−２９６９５６号公報Japanese Patent Laid-Open No. 2004-296156 特開２００６−４８９９６号公報JP 2006-48996 A 特開２００５−３０２６９８号公報JP-A-2005-302698 特開２００２−１６５６９８号公報JP 2002-165698 A 特開２００７−１６５６９８号公報JP 2007-165698 A

しかし、キャパシタの外周を覆う金属フィルムは一般的に強度が低く、衝撃、振動などで簡単にダメージを受け、ピンホール等が生じる可能性がある。ピンホール等が生じると、金属フィルムの内部に水分が進入し、金属フィルムによる水分遮断構造が機能しなくなるおそれがあった。   However, the metal film covering the outer periphery of the capacitor is generally low in strength, and can be easily damaged by impact, vibration, etc., which may cause pinholes. When pinholes or the like are generated, moisture enters the inside of the metal film, and the moisture blocking structure by the metal film may not function.

特に大型キャパシタは自重が大きいため金属フィルムで覆う構造を採用すると、自重のかかるところは金属フィルムがよりダメージを受けやすいと考えられることから、例えば、振動の影響を受け易い車載用途等のキャパシタにあっては外周を金属フィルムによって覆う構造を採らず、当該キャパシタを衝撃、振動などに耐え得る丈夫な金属筐体等に納め、その筐体に保護、耐震、防振、絶縁等の機能を付加している。   In particular, large capacitors have a large weight, so if a structure covered with a metal film is adopted, the metal film is considered to be more susceptible to damage where the weight is applied. In this case, the capacitor is not covered with a metal film, but the capacitor is placed in a strong metal case that can withstand shocks, vibrations, etc., and functions such as protection, earthquake resistance, vibration isolation, and insulation are added to the case. is doing.

また、キャパシタは充放電を行うことによる電流の出入りがあると〔内部抵抗〕×〔電流〕2に相当するジュール熱を発生させ、これがそのままキャパシタの温度を上昇させる要因となる。そのため、頻繁に充放電を繰り返すような用途に適用されるキャパシタにおいては、当該キャパシタの温度が急激に上昇し、使用可能な温度の上限を超えてしまうおそれがあった。 In addition, when current flows in and out due to charging / discharging of the capacitor, Joule heat corresponding to [internal resistance] × [current] 2 is generated, and this causes the temperature of the capacitor to rise as it is. For this reason, in a capacitor that is used for applications where charging and discharging are frequently repeated, the temperature of the capacitor suddenly rises and may exceed the upper limit of the usable temperature.

そこで、キャパシタを収納する筐体には当該キャパシタを機械的に保護するための上述した保護、耐震、防振、絶縁等の機能と同時に、放熱の機能をも付加する必要があり、従来、このような放熱の機能としてはキャパシタを収納する筐体に冷却ファンを取り付けるだけの簡単な構造を用いることが多かった。   Therefore, it is necessary to add a function of heat dissipation to the housing for storing the capacitor as well as the above-described protection, earthquake resistance, vibration isolation, insulation and the like functions for mechanical protection of the capacitor. In many cases, such a heat dissipation function uses a simple structure in which a cooling fan is simply attached to a housing that houses a capacitor.

しかし、筐体に冷却ファンを取り付けるだけの構造では、キャパシタの表面の熱を空気による熱伝導のみを利用して放熱する構成であるため、冷却能力が不十分となる場合が考えられた。特に回生吸収用途のキャパシタなどにあっては、３０秒以上連続で大電流の放電を行う等が要求されるため、キャパシタを有効に冷却する構造を備える必要がある。   However, in the structure in which only the cooling fan is attached to the housing, the heat of the surface of the capacitor is radiated using only heat conduction by air, so that the cooling capacity may be insufficient. In particular, a capacitor for regenerative absorption is required to discharge a large current continuously for 30 seconds or more, and therefore needs to have a structure for effectively cooling the capacitor.

このようなキャパシタの放熱の問題に対応するために、キャパシタ外部からの水冷や、金属製の大型ヒートシンクの取り付け等が考案されているがいずれも実用化するにはメンテナンス性、スペース効率などの点において難点があった。   In order to deal with such problems of capacitor heat dissipation, water cooling from the outside of the capacitor and installation of a large metal heat sink have been devised. There were difficulties.

また各キャパシタに設けられた電気取り出し用の端子部は、例えば車載用途等、キャパシタが振動を受けるような場合、繰り返し振動を受けることにより疲労等が生じて破損する可能性があった。   In addition, when the capacitor is subjected to vibration, for example, for in-vehicle use, the terminal portion for taking out electricity provided in each capacitor may be damaged due to repeated vibration.

このようなことから本発明は、振動に対する耐久性及び冷却機能を向上させることが可能な電気化学蓄電素子モジュールを提供することを目的とする。   Therefore, an object of the present invention is to provide an electrochemical storage element module capable of improving durability against vibration and cooling function.

上記の課題を解決するための第１の発明に係る電気化学蓄電素子モジュールは、箱型の筐体内に、並列または直列に接続される複数の電気化学蓄電素子を収納してなる電気化学蓄電素子モジュールであって、前記複数の電気化学蓄電素子が前記筐体の下面に設けられた可塑性を有する振動防止部材の上に一方向に並置され、相互に隣接する前記電気化学蓄電素子間、及び、前記複数の電気化学蓄電素子のうち両端に配置された電気化学蓄電素子と該電気化学蓄電素子に対向する前記筐体の面との間に伝熱性を有する加圧部材が介装され、前記電気化学蓄電素子と前記筐体との間に介装された前記加圧部材のうちの少なくとも一方と前記筐体との間に、前記筐体内に収納された複数の前記電気化学蓄電素子の移動を規制するように前記加圧部材を押圧する弾性体が設けられていることを特徴とする。   An electrochemical storage element module according to a first invention for solving the above-described problems is an electrochemical storage element in which a plurality of electrochemical storage elements connected in parallel or in series are housed in a box-shaped housing. A module, wherein the plurality of electrochemical storage elements are juxtaposed in one direction on a plastic vibration-preventing member provided on the lower surface of the housing, and between the adjacent electrochemical storage elements; and A pressurizing member having heat conductivity is interposed between the electrochemical storage element disposed at both ends of the plurality of electrochemical storage elements and the surface of the casing facing the electrochemical storage element, The movement of the plurality of electrochemical storage elements housed in the casing is performed between at least one of the pressure members interposed between the chemical storage element and the casing and the casing. The pressure member to regulate And an elastic member for pressing is provided.

上記の課題を解決するための第２の発明に係る電気化学蓄電素子モジュールは、第１の発明において、一つの前記電気化学蓄電素子に対して少なくとも一つの伝熱性を有するシート状物を前記電気化学蓄電素子と前記加圧部材との間に設け、前記シート状物を前記電気化学蓄電素子に面接触させる一方、前記シート状物の一端を前記筐体に加圧した状態で面接触させることを特徴とする。   An electrochemical storage element module according to a second invention for solving the above-described problems is the first invention, wherein the sheet-like material having at least one heat transfer property with respect to one electrochemical storage element is the electrical storage element. Provided between the chemical electricity storage element and the pressure member, the sheet-like material is brought into surface contact with the electrochemical electricity storage element, and one end of the sheet-like material is brought into surface contact with the casing being pressurized. It is characterized by.

上記の課題を解決するための第３の発明に係る電気化学蓄電素子モジュールは、第１又は第２の発明において、前記筐体に伝導性を有する二つの導体を設け、前記電気化学蓄電素子に設けられた正負の端子と前記導体とを、それぞれ弾性変形可能に形成されたケーブルで接続したことを特徴とする。   An electrochemical storage element module according to a third invention for solving the above-described problems is the first or second invention, wherein the casing is provided with two conductive conductors, and the electrochemical storage element is provided in the electrochemical storage element. The provided positive and negative terminals and the conductor are connected by cables formed to be elastically deformable.

上記の課題を解決するための第４の発明に係る電気化学蓄電素子モジュールは、第１乃至第３のいずれかの発明において、前記筐体の前記電気化学蓄電素子の配列方向に沿って延びる側壁の一方に冷却ファンを設置するとともに、前記筐体の前記電気化学蓄電素子の配列方向に沿って延びる側壁の他方に通風孔を形成したことを特徴とする。   An electrochemical energy storage element module according to a fourth invention for solving the above-mentioned problems is the sidewall according to any one of the first to third inventions, extending along the arrangement direction of the electrochemical energy storage element of the housing. A cooling fan is installed on one side of the casing, and a ventilation hole is formed on the other side wall of the casing extending along the arrangement direction of the electrochemical storage element.

上記の課題を解決するための第５の発明に係る電気化学蓄電素子モジュールは、第１乃至第４のいずれかの発明において、前記電気化学蓄電素子が、アルミラミネートフィルムによって外装された電気二重層キャパシタ、又はリチウムイオン電池であることを特徴とする。   An electrochemical storage element module according to a fifth invention for solving the above-mentioned problems is the electric double layer according to any one of the first to fourth inventions, wherein the electrochemical storage element is packaged with an aluminum laminate film. It is a capacitor or a lithium ion battery.

上記の課題を解決するための第６の発明に係る電気化学蓄電素子モジュールは、第１乃至第５のいずれかの発明において、前記振動防止部材が、シリコンゴムであることを特徴とする。   The electrochemical storage element module according to a sixth invention for solving the above-mentioned problems is characterized in that, in any one of the first to fifth inventions, the vibration preventing member is silicon rubber.

上記の課題を解決するための第７の発明に係る電気化学蓄電素子モジュールは、第２乃至第６のいずれかの発明において、前記シート状物がグラファイトシートであることを特徴とする。   An electrochemical storage element module according to a seventh invention for solving the above-mentioned problems is any one of the second to sixth inventions, wherein the sheet-like material is a graphite sheet.

上述した本発明に係る電気化学蓄電素子モジュールによれば、電気化学蓄電素子の振動に対する耐久性を向上させることができるとともに、より高効率に電気化学蓄電素子が発生する熱を筐体の外部へ放熱することができる。   According to the above-described electrochemical storage element module according to the present invention, durability against vibration of the electrochemical storage element can be improved, and heat generated by the electrochemical storage element to the outside of the casing can be increased more efficiently. It can dissipate heat.

以下に本発明の実施例を説明する。   Examples of the present invention will be described below.

図面を用いて本発明の一実施例を詳細に説明する。図１は本実施例に係るキャパシタモジュールの内部構造を示す上面図、図２は本実施例に係るキャパシタモジュールの側面図、図３は本実施例に係るキャパシタモジュールの内部構造を示す側部断面図、図４は本実施例に係るキャパシタモジュールの内部構造を示す他の側部断面図、図５は本実施例に用いるキャパシタの一例を示す斜視図である。   An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a top view showing the internal structure of the capacitor module according to this embodiment, FIG. 2 is a side view of the capacitor module according to this embodiment, and FIG. 3 is a side cross-sectional view showing the internal structure of the capacitor module according to this embodiment. FIG. 4 is another side cross-sectional view showing the internal structure of the capacitor module according to this embodiment, and FIG. 5 is a perspective view showing an example of the capacitor used in this embodiment.

図１乃至図４に示すように、本実施例において電気化学蓄電素子モジュールとしてのキャパシタモジュールは、衝撃、振動などに耐え得る強度を有する材料によって形成された箱型の金属筐体１内に、複数（本実施例では９個）のキャパシタ２を相互に間隔をおいた状態で一列に並べた状態で収納した構成となっている。金属筐体１の底面１ａには、当該金属筐体１の振動がキャパシタ２に伝達されることを防止するため、振動を吸収する振動防止部材としての防振マット３が設けられており、キャパシタ２はこの防振マット３上に載置されているものとする。また、キャパシタ２の配列方向に平行する、換言すると、キャパシタ２の配列方向に沿って延びる金属筐体１の一側壁１ｂには複数（本実施例では、キャパシタ２の配列方向に沿って３つ）の冷却ファン４が設置されている。   As shown in FIGS. 1 to 4, a capacitor module as an electrochemical storage element module in the present embodiment is provided in a box-shaped metal housing 1 formed of a material having strength that can withstand impact, vibration, and the like. A plurality of (9 in this embodiment) capacitors 2 are housed in a state of being arranged in a row with a space between each other. The bottom surface 1a of the metal casing 1 is provided with a vibration isolating mat 3 as a vibration preventing member that absorbs vibration in order to prevent the vibration of the metal casing 1 from being transmitted to the capacitor 2. 2 is assumed to be placed on the anti-vibration mat 3. In addition, a plurality of (in this embodiment, three along the arrangement direction of the capacitors 2) are provided on one side wall 1 b of the metal housing 1 extending in the arrangement direction of the capacitors 2, which is parallel to the arrangement direction of the capacitors 2. ) Cooling fan 4 is installed.

相互に隣接するキャパシタ２間、及び、並置されたキャパシタ２のうち両側に配置されたキャパシタ２とこれらにそれぞれ対向する金属筐体１の側壁１ｃ，１ｄとの間にはそれぞれ加圧部材としての伝熱加圧ゴム５が介装されている。伝熱加圧ゴム５は、熱伝導性とクッション性を兼ね備えたものであり、例えば、シリコンゴム等を用いると好適である。   Between the capacitors 2 adjacent to each other and between the capacitors 2 arranged on both sides of the juxtaposed capacitors 2 and the side walls 1c and 1d of the metal housing 1 facing each of them, a pressure member is provided. A heat transfer pressure rubber 5 is interposed. The heat transfer pressure rubber 5 has both thermal conductivity and cushioning properties. For example, silicon rubber or the like is preferably used.

また、本実施例では、それぞれのキャパシタ２に対してそれぞれ一つのシート状物としての熱伝導シート６が配設されている。詳しくは、熱伝導シート６は、ほぼ矩形状に形成されたシート状の部材であり、一端側が、金属筐体１の側壁であって冷却ファン４が設置された側壁１ｂに対向する側壁１ｅに、板状の部材（以下、伝熱加圧板という）７を介して締め付けネジ８によって固定されて側壁１ｅに面接触した状態で密着し、他端側が、キャパシタ２と伝熱加圧ゴム５との間に挿入されキャパシタ２に面接触した状態で密着している。なお、該熱伝導シート６には熱伝導が大きい素材、例えば、５００〜８００Ｗ／ｍ・ｋのグラファイトシートを用いると好適である。また、省スペース性を考慮するならば厚さは０．１ｍｍ以下のものが適する。   In the present embodiment, one heat conductive sheet 6 as a sheet is provided for each capacitor 2. Specifically, the heat conductive sheet 6 is a sheet-like member formed in a substantially rectangular shape, and one end side is a side wall 1e which is the side wall of the metal housing 1 and faces the side wall 1b where the cooling fan 4 is installed. The plate 2 is fixed by a clamping screw 8 through a plate-like member (hereinafter referred to as a heat transfer pressure plate) 7 and is in close contact with the side wall 1e, and the other end is connected to the capacitor 2 and the heat transfer pressure rubber 5 And is in close contact with the capacitor 2 in surface contact. The heat conductive sheet 6 is preferably made of a material having high heat conductivity, for example, a graphite sheet of 500 to 800 W / m · k. In consideration of space saving, a thickness of 0.1 mm or less is suitable.

更に、本実施例においてキャパシタ２と金属筐体１との間に介装された伝熱加圧ゴム５のうち、一方（図１では右側）の伝熱加圧ゴム５と金属筐体１の内壁（図１では内壁１ｄ）との間には伸縮方向がキャパシタ２の配列方向と等しい複数の弾性体としてのバネ９が介装され、このばね９によって金属筐体１内に収納されたキャパシタ２が加圧、固定されている。即ち、このバネ９を設けることにより、キャパシタ２は間に伝熱加圧ゴム５を挟んだ状態で金属筐体１内に固定されて金属筐体１内における移動を規制されるとともに、それぞれ熱伝導シート６に密着した状態となっている。なお、バネ９は板材１０を介して伝熱加圧ゴム５およびキャパシタ２を押圧している。   Furthermore, of the heat transfer pressure rubber 5 interposed between the capacitor 2 and the metal casing 1 in the present embodiment, one of the heat transfer pressure rubber 5 and the metal casing 1 (on the right side in FIG. 1). Between the inner wall (inner wall 1d in FIG. 1), a plurality of springs 9 as elastic bodies whose expansion and contraction directions are equal to the arrangement direction of the capacitors 2 are interposed, and the capacitors housed in the metal housing 1 by the springs 9 2 is pressurized and fixed. That is, by providing this spring 9, the capacitor 2 is fixed in the metal casing 1 with the heat transfer pressure rubber 5 sandwiched therebetween, so that the movement in the metal casing 1 is restricted, and each capacitor 2 is heated. The conductive sheet 6 is in close contact with the conductive sheet 6. The spring 9 presses the heat transfer pressure rubber 5 and the capacitor 2 through the plate material 10.

更に、金属筐体１内には、キャパシタ２の配列方向に沿って延び、片方の端部が金属筐体１から突出するように配置されたプラス導体１１及びマイナス導体１２が設けられている。また、図５に示すように、各々のキャパシタ２にはプラス端子１３およびマイナス端子１４が設けられている。   Furthermore, a plus conductor 11 and a minus conductor 12 are provided in the metal casing 1 so as to extend along the arrangement direction of the capacitors 2 and so that one end protrudes from the metal casing 1. Further, as shown in FIG. 5, each capacitor 2 is provided with a plus terminal 13 and a minus terminal 14.

本実施例において、各々のキャパシタ２のプラス端子１３およびマイナス端子１４と、上記プラス導体１１、マイナス導体１２とは、図１に示すように、それぞれ導電性を有し弾性変形可能に構成されたフレキシブルなケーブルであるプラス接続ケーブル１５、マイナス接続ケーブル１６を介して接続されている。   In this embodiment, the positive terminal 13 and the negative terminal 14 of each capacitor 2 and the positive conductor 11 and the negative conductor 12 are each configured to be conductive and elastically deformable as shown in FIG. They are connected via a plus connection cable 15 and a minus connection cable 16 which are flexible cables.

また、図２に示すように、金属筐体１の熱伝導シート６が固定された面１ｅ、換言すると、冷却ファン４が設置された面１ｂに対向する面には、隣接するキャパシタ１間の間隙に対応する位置（図２では８箇所）に、それぞれ複数（図２では１８箇所ずつ）の通風孔１７が形成されている。   Moreover, as shown in FIG. 2, the surface 1e to which the heat conductive sheet 6 of the metal casing 1 is fixed, in other words, the surface facing the surface 1b on which the cooling fan 4 is installed, is located between adjacent capacitors 1. A plurality (18 in FIG. 2) of ventilation holes 17 are formed at positions corresponding to the gaps (8 in FIG. 2).

なお、上記金属筐体１は衝撃、振動などに耐え得る強度を有する材料によって形成されているものとし、冷却ファン４は必要に応じた冷却機能を有するものを用いるようにする。また、キャパシタ２は、図５に示すようにアルミラミネートフィルム１８によって覆われているものとする。   The metal casing 1 is made of a material having a strength capable of withstanding impacts, vibrations, and the like, and the cooling fan 4 having a cooling function as required is used. Further, it is assumed that the capacitor 2 is covered with an aluminum laminate film 18 as shown in FIG.

以下に、本実施例に係るキャパシタモジュールの作用効果について説明する。本実施例に係るキャパシタモジュールにおいては、金属筐体１内に一列に配置、収納したキャパシタ２を金属筐体１の底面１ａに設けた防振マット３の上に載置するとともに、金属筐体１内に一列に配置、収納したキャパシタ２に、熱伝導シート６を伝熱加圧ゴム５及びバネ９を用いて加圧した状態でそれぞれ面接触させる構成としたことにより、振動に対する耐久性が向上するとともに、熱抵抗を小さくしてキャパシタの熱を効率よく熱伝導シート６に伝達させることが可能になる。   Below, the effect of the capacitor module which concerns on a present Example is demonstrated. In the capacitor module according to the present embodiment, the capacitors 2 arranged and housed in a row in the metal housing 1 are placed on the anti-vibration mat 3 provided on the bottom surface 1a of the metal housing 1, and the metal housing Since the capacitors 2 arranged and housed in a row in 1 are in contact with each other in a state where the heat conductive sheet 6 is pressed using the heat transfer pressure rubber 5 and the spring 9, durability against vibration is achieved. In addition to improving the thermal resistance, the heat of the capacitor can be efficiently transmitted to the heat conductive sheet 6.

また、キャパシタ２の熱を吸収した熱伝導シート６の一端側を、伝熱加圧板７および締め付けネジ８を用いて加圧した状態で金属筐体１に密着させるようにしたため、金属筐体１を介してキャパシタ２から熱伝導シート６に伝達された熱を効率よく放熱させることができる。更に、金属筐体１の一側壁１ｂに冷却ファン４を設置する一方、該側壁１ｂに対向する他の側壁１ｅに通風孔１７を形成する構成とし、冷却風を併用するようにしたことによって、より冷却効率を向上させることが可能となった。具体的には、熱伝導シートを備えない従来の構成に比較して冷却効率を８０％程度向上させることが可能となった。   In addition, since one end side of the heat conduction sheet 6 that has absorbed the heat of the capacitor 2 is brought into close contact with the metal case 1 in a state of being pressurized using the heat transfer pressure plate 7 and the fastening screw 8, the metal case 1 Thus, the heat transferred from the capacitor 2 to the heat conductive sheet 6 can be efficiently radiated. Further, the cooling fan 4 is installed on one side wall 1b of the metal casing 1, while the ventilation hole 17 is formed on the other side wall 1e facing the side wall 1b, and the cooling air is used together. It became possible to improve cooling efficiency more. Specifically, it has become possible to improve the cooling efficiency by about 80% as compared with a conventional configuration not including a heat conductive sheet.

更に加えて、熱伝導シート６は薄くフレキシブルなものを用いることができるため従来の金属筐体に比較して、設置スペースを拡張することなく高い冷却効率を得ることが可能となった。   In addition, since the heat conductive sheet 6 can be thin and flexible, it is possible to obtain high cooling efficiency without expanding the installation space as compared with the conventional metal casing.

なお、上述した実施例においては、複数の電気化学蓄電素子としてキャパシタ２を収納する金属筐体１について説明したが、本発明は上述した実施例に限定されるものではなく、例えば、リチウムイオン電池などの組電池を金属筐体内に一列に配設するような構成に適用した場合でも同様の効果を得ることができる。   In the above-described embodiment, the metal casing 1 that houses the capacitor 2 as a plurality of electrochemical storage elements has been described. However, the present invention is not limited to the above-described embodiment, and for example, a lithium ion battery Even when the assembled battery is applied to a configuration in which the assembled batteries are arranged in a row in the metal casing, the same effect can be obtained.

また、上述した実施例においては、複数の電気化学蓄電素子としてのキャパシタ２を並列に接続する例を示したが、電気化学蓄電素子を直列に接続する場合であっても同様に構成することが可能であることはいうまでもない。   Moreover, although the example which connects the capacitor 2 as several electrochemical electrical storage elements in parallel was shown in the Example mentioned above, even if it is a case where an electrochemical electrical storage element is connected in series, it can comprise similarly. It goes without saying that it is possible.

本発明は、放熱構造を備える電気二重層キャパシタモジュールまたはリチウム電池モジュール等の電気化学蓄電素子モジュールに適用可能である。   The present invention is applicable to an electrochemical storage element module such as an electric double layer capacitor module or a lithium battery module having a heat dissipation structure.

本発明の実施例に係るキャパシタモジュールの内部構造を示す上面図である。It is a top view which shows the internal structure of the capacitor module which concerns on the Example of this invention. 本発明の実施例に係るキャパシタモジュールの側面図である。It is a side view of the capacitor module which concerns on the Example of this invention. 本発明の実施例に係るキャパシタモジュールの内部構造を示す側部断面図である。It is side part sectional drawing which shows the internal structure of the capacitor module based on the Example of this invention. 本発明の実施例に係るキャパシタモジュールの内部構造を示す他の側部断面図である。FIG. 6 is another side cross-sectional view showing the internal structure of the capacitor module according to the embodiment of the present invention. 本発明の実施例に係るキャパシタモジュールに用いるキャパシタの一例を示す斜視図である。It is a perspective view which shows an example of the capacitor used for the capacitor module which concerns on the Example of this invention.

符号の説明Explanation of symbols

１ 金属筐体
１ａ 金属筐体の底面
１ｂ，１ｃ，１ｄ，１ｅ 金属筐体の側壁
２ キャパシタ
３ 防振マット
４ 冷却ファン
５ 伝熱加圧ゴム
６ 熱伝導シート
７ 伝熱加圧板
８ 締め付けネジ
９ バネ
１０ 板材
１１ プラス導体
１２ マイナス導体
１３ プラス端子
１４ マイナス端子
１５ プラス接続ケーブル
１６ マイナス接続ケーブル
１７ 通風孔
１８ アルミラミネートフィルム DESCRIPTION OF SYMBOLS 1 Metal housing 1a Bottom surface of metal housing 1b, 1c, 1d, 1e Side wall of metal housing 2 Capacitor 3 Anti-vibration mat 4 Cooling fan 5 Heat transfer pressure rubber 6 Heat transfer sheet 7 Heat transfer pressure plate 8 Tightening screw 9 Spring 10 Plate material 11 Positive conductor 12 Negative conductor 13 Positive terminal 14 Negative terminal 15 Positive connection cable 16 Negative connection cable 17 Ventilation hole 18 Aluminum laminate film

Claims (7)

箱型の筐体内に、並列または直列に接続される複数の電気化学蓄電素子を収納してなる電気化学蓄電素子モジュールであって、
前記複数の電気化学蓄電素子が前記筐体の下面に設けられた可塑性を有する振動防止部材の上に一方向に並置され、
相互に隣接する前記電気化学蓄電素子間、及び、前記複数の電気化学蓄電素子のうち両端に配置された電気化学蓄電素子と該電気化学蓄電素子に対向する前記筐体の面との間に伝熱性を有する加圧部材が介装され、
前記電気化学蓄電素子と前記筐体との間に介装された前記加圧部材のうちの少なくとも一方と前記筐体との間に、前記筐体内に収納された複数の前記電気化学蓄電素子の移動を規制するように前記加圧部材を押圧する弾性体が設けられている
ことを特徴とする電気化学蓄電素子モジュール。 An electrochemical storage element module comprising a plurality of electrochemical storage elements connected in parallel or in series in a box-shaped housing,
The plurality of electrochemical energy storage elements are juxtaposed in one direction on a plastic vibration preventing member provided on the lower surface of the housing,
Transmission between the electrochemical storage elements adjacent to each other and between the electrochemical storage elements disposed at both ends of the plurality of electrochemical storage elements and the surface of the housing facing the electrochemical storage element. A pressure member having thermal properties is interposed,
Between the casing and at least one of the pressure members interposed between the electrochemical storage element and the casing, a plurality of the electrochemical storage elements housed in the casing An electrochemical storage element module, wherein an elastic body that presses the pressure member so as to restrict movement is provided. 一つの前記電気化学蓄電素子に対して少なくとも一つの伝熱性を有するシート状物を前記電気化学蓄電素子と前記加圧部材との間に設け、前記シート状物を前記電気化学蓄電素子に面接触させる一方、前記シート状物の一端を前記筐体に加圧した状態で面接触させることを特徴とする請求項１記載の電気化学蓄電素子モジュール。   A sheet-like material having at least one heat transfer property with respect to one electrochemical storage element is provided between the electrochemical storage element and the pressure member, and the sheet-like material is in surface contact with the electrochemical storage element. 2. The electrochemical storage element module according to claim 1, wherein one end of the sheet-like material is brought into surface contact with the casing in a pressurized state. 前記筐体に伝導性を有する二つの導体を設け、前記電気化学蓄電素子に設けられた正負の端子と前記導体とを、それぞれ弾性変形可能に形成されたケーブルで接続したことを特徴とする請求項１又は請求項２記載の電気化学蓄電素子モジュール。   Two conductive conductors are provided in the casing, and positive and negative terminals provided in the electrochemical storage element are connected to the conductors by cables formed to be elastically deformable, respectively. The electrochemical storage element module according to claim 1 or 2. 前記筐体の前記電気化学蓄電素子の配列方向に沿って延びる側壁の一方に冷却ファンを設置するとともに、前記筐体の前記電気化学蓄電素子の配列方向に沿って延びる側壁の他方に通風孔を形成したことを特徴とする請求項１乃至請求項３のいずれか１項に電気化学蓄電素子モジュール。   A cooling fan is installed on one side wall of the casing extending along the arrangement direction of the electrochemical storage element, and a ventilation hole is provided on the other side wall of the casing extending along the arrangement direction of the electrochemical storage element. The electrochemical storage element module according to any one of claims 1 to 3, wherein the electrochemical storage element module is formed. 前記電気化学蓄電素子が、アルミラミネートフィルムによって外装された電気二重層キャパシタ、又はリチウムイオン電池であることを特徴とする請求項１乃至請求項４のいずれか１項に記載の電気化学蓄電素子モジュール。   The electrochemical storage element module according to any one of claims 1 to 4, wherein the electrochemical storage element is an electric double layer capacitor or a lithium ion battery covered with an aluminum laminate film. . 前記振動防止部材が、シリコンゴムであることを特徴とする請求項１乃至請求項５のいずれか１項に記載の電気化学蓄電素子モジュール。   The electrochemical storage element module according to any one of claims 1 to 5, wherein the vibration preventing member is silicon rubber. 前記シート状物がグラファイトシートであることを特徴とする請求項２乃至請求項６のいずれか１項に記載の電気化学蓄電素子モジュール。   The electrochemical storage element module according to any one of claims 2 to 6, wherein the sheet-like material is a graphite sheet.
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