JP2015191867A - Power storage module and method for cooling storage battery - Google Patents

Power storage module and method for cooling storage battery Download PDF

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JP2015191867A
JP2015191867A JP2014070141A JP2014070141A JP2015191867A JP 2015191867 A JP2015191867 A JP 2015191867A JP 2014070141 A JP2014070141 A JP 2014070141A JP 2014070141 A JP2014070141 A JP 2014070141A JP 2015191867 A JP2015191867 A JP 2015191867A
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flow path
storage battery
cooling medium
flow
storage module
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JP6143699B2 (en
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正人 齋藤
Masato Saito
正人 齋藤
新吾 中野
Shingo Nakano
新吾 中野
雅弘 塚本
Masahiro Tsukamoto
雅弘 塚本
健夫 田中
Takeo Tanaka
健夫 田中
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FDK Lithium Ion Capacitor Co Ltd
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FDK Lithium Ion Capacitor 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
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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E60/10—Energy storage using batteries

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Abstract

PROBLEM TO BE SOLVED: To provide a power storage module and a method for cooling a storage battery, highly efficiently cooling storage batteries and reducing a temperature difference between the storage batteries.SOLUTION: A storage battery laminate 2 is formed by laminating a plurality of storage batteries 1. A channel 111 flows a cooling medium therethrough in a predetermined direction along the storage battery laminate 2. A plurality of current plates 105 are disposed in the predetermined direction of the channel 111, have apertures where the cooling medium passes in the channel 111, an aperture ratio of the apertures gradually decreasing as proceeding in the predetermined direction, and direct the flow direction of the cooling medium colliding with the current plates toward a lamination plane extending in the lamination direction of the storage battery laminate 2. A channel 121 flows the cooling medium therethrough along the lamination plane, the cooling medium having being changed in a flow direction thereof by the current plates 105.

Description

本発明は、蓄電モジュール及び蓄電池冷却方法に関する。   The present invention relates to a power storage module and a storage battery cooling method.

近年、リチウムイオン二次電池、ニッケル水素電池、電気二重層キャパシタ又はリチウムイオンキャパシタなどの蓄電池を用いた蓄電モジュールが開発されている。このような蓄電モジュールは、複数の蓄電池が直列又は並列に接続された蓄電体を有し、高電圧や大容量の状態で充放電することができるため、電源装置として様々な用途に用いられている。   In recent years, power storage modules using storage batteries such as lithium ion secondary batteries, nickel metal hydride batteries, electric double layer capacitors, or lithium ion capacitors have been developed. Such a power storage module has a power storage unit in which a plurality of storage batteries are connected in series or in parallel, and can be charged / discharged in a high voltage or large capacity state. Therefore, it is used for various applications as a power supply device. Yes.

例えば、太陽光発電や風力発電などの負荷平準化装置、瞬時電圧低下対策装置、電気自動車やハイブリッドカーのエネルギー回生装置などのような蓄電システムにおいては、エネルギー容量が大きく且つ急速充放電が可能な蓄電デバイスが好ましい。そこで、これらのような蓄電システムでは、リチウムイオン二次電池などを用いた上述した蓄電モジュールが用いられることが多い。   For example, in energy storage systems such as load leveling devices such as solar power generation and wind power generation, instantaneous voltage drop countermeasure devices, and energy regeneration devices for electric vehicles and hybrid cars, the energy capacity is large and rapid charging and discharging are possible. An electricity storage device is preferred. Therefore, in the power storage systems such as these, the above-described power storage module using a lithium ion secondary battery or the like is often used.

これらの蓄電モジュールに搭載されている蓄電池は、充放電により発熱する。そして、一般的に蓄電池は熱環境によって劣化が進行することが知られている。そこで、蓄電池の寿命性能を延ばすために効率よく放熱することが好ましい。   The storage batteries mounted on these power storage modules generate heat by charging and discharging. In general, it is known that the storage battery deteriorates due to the thermal environment. Therefore, it is preferable to efficiently dissipate heat in order to extend the life performance of the storage battery.

また、搭載されている蓄電池の一部に熱が集中し温度むらが発生した場合、一部の蓄電池の寿命が他の蓄電池と比べて短くなってしまい、全体的な蓄電池の寿命性能に悪影響を及ぼす。そのため、各蓄電池の温度差を小さくすることが好ましい。   In addition, when heat is concentrated on some of the installed storage batteries and temperature unevenness occurs, the life of some storage batteries is shortened compared to other storage batteries, which adversely affects the overall performance of the storage batteries. Effect. Therefore, it is preferable to reduce the temperature difference between the storage batteries.

従来、蓄電モジュールの放熱構造として、蓄電池を一定の間隔をあけて一列に並べ、並んでいる方向の一方から他方に向けてファンにより風を送り蓄電池間に風を流して蓄電池を冷却する技術が提案されている。   Conventionally, as a heat dissipation structure for a power storage module, there is a technology in which storage batteries are arranged in a line at regular intervals, and a fan is sent from one side to the other in a lined direction to send wind between the storage batteries to cool the storage battery. Proposed.

特開２００９−２５２７３０号公報JP 2009-252730 A

そこで、放熱性能を向上させるために、単純に放熱面積を大きくすることが考えられる。しかしながら、放熱面積を大きくした場合、蓄電モジュールの体積が大きくなってしまう。   In order to improve the heat dissipation performance, it is conceivable to simply increase the heat dissipation area. However, when the heat radiation area is increased, the volume of the power storage module is increased.

また、蓄電池間の間隔に風流して冷却する従来技術では、蓄電モジュールの体積を小さくしようとすると蓄電池間の間隔を狭くすることが考えられる。しかし、蓄電池間の間隔を狭くした場合、冷却媒体を流す際の圧力損失が大きくなってしまう。そのため、強力なブロワーや送風ファンなどが必要となり、製造コストの増加や製造工程の煩雑化などが発生してしまう。   Moreover, in the prior art which cools by wind-flowing in the space | interval between storage batteries, when trying to make the volume of an electrical storage module small, it is possible to narrow the space | interval between storage batteries. However, when the interval between the storage batteries is narrowed, the pressure loss when the cooling medium flows is increased. For this reason, a powerful blower, a blower fan, or the like is required, resulting in an increase in manufacturing cost and a complicated manufacturing process.

開示の技術は、上記に鑑みてなされたものであって、蓄電池を効率よく冷却し、各蓄電池の温度差を小さくする蓄電モジュール及び蓄電池冷却方法を提供することを目的とする。   The disclosed technology has been made in view of the above, and an object thereof is to provide a power storage module and a storage battery cooling method that efficiently cool a storage battery and reduce a temperature difference between the storage batteries.

本願の開示する蓄電モジュール及び蓄電池冷却方法は、一つの態様において、蓄電池積層体は、複数の蓄電池が積層されて形成される。第１流路は、冷却媒体を前記蓄電池積層体に沿って所定方向に流す。整流部材は、前記第１流路の前記所定方向に複数配置され、前記所定方向に進むにしたがい前記第１流路における前記冷却媒体が通過する開口率を狭め、ぶつかった前記冷却媒体の流向を前記蓄電池積層体の積層方向へ延びる積層面へ向ける。第２流路は、前記整流部材により流向が変更された前記冷却媒体を前記積層面に沿って流す。   In one aspect of the storage module and the storage battery cooling method disclosed in the present application, the storage battery stack is formed by stacking a plurality of storage batteries. The first flow path causes the cooling medium to flow in a predetermined direction along the storage battery stack. A plurality of rectifying members are arranged in the predetermined direction of the first flow path, and the opening rate through which the cooling medium passes in the first flow path is narrowed as the flow proceeds in the predetermined direction. Directed to the stacking surface extending in the stacking direction of the storage battery stack. The second flow path flows the cooling medium whose flow direction is changed by the rectifying member along the laminated surface.

本願の開示する蓄電モジュール及び蓄電池冷却方法の一つの態様によれば、蓄電池を効率よく冷却し、各蓄電池の温度差を小さくすることができるという効果を奏する。   According to one aspect of the power storage module and the storage battery cooling method disclosed in the present application, it is possible to efficiently cool the storage battery and reduce the temperature difference between the storage batteries.

図１は、蓄電池積層体の斜視図である。FIG. 1 is a perspective view of a battery stack. 図２は、実施例１に係る蓄電モジュールの斜視図である。FIG. 2 is a perspective view of the power storage module according to the first embodiment. 図３は、本実施例に係る仕切板の説明図である。FIG. 3 is an explanatory diagram of the partition plate according to the present embodiment. 図４は、図２における蓄電モジュールのＡ−Ａ断面図である。4 is a cross-sectional view of the power storage module taken along the line AA in FIG. 図５は、図２における蓄電モジュールのＢ−Ｂ断面図である。5 is a cross-sectional view of the power storage module taken along line BB in FIG. 図６は、図２における蓄電モジュールのＣ−Ｃ断面図である。6 is a cross-sectional view of the power storage module taken along the line C-C in FIG. 2. 図７は、実施例１に係る蓄電モジュール１００における蓄電池の冷却処理のフローチャートである。FIG. 7 is a flowchart of the storage battery cooling process in the power storage module 100 according to the first embodiment. 図８は、実施例１に係る蓄電モジュールを用いた放熱実験の結果を表す図である。FIG. 8 is a diagram illustrating a result of a heat radiation experiment using the power storage module according to Example 1. 図９Ａは、整流板を設けない場合の冷却状態を表す図である。FIG. 9A is a diagram illustrating a cooling state when a current plate is not provided. 図９Ｂは、Ａ＝４００とした整流板を設けた場合の冷却状態を表す図である。FIG. 9B is a diagram illustrating a cooling state when a current plate with A = 400 is provided. 図１０は、仕切板の他の例を示す図である。FIG. 10 is a diagram illustrating another example of the partition plate. 図１１は、ＸＺ方向の断面が三角形となる三角柱の形状を有する整流板を用いた場合の冷却部材のＸＺ断面の一例の図である。FIG. 11 is an example of an XZ cross section of the cooling member when a rectifying plate having a triangular prism shape in which the cross section in the XZ direction is a triangle is used. 図１２は、ＸＺ方向の断面が三角形となる三角柱の形状を有する整流板を用いた場合の冷却部材のＸＺ断面の他の例の図である。FIG. 12 is a diagram of another example of the XZ cross section of the cooling member when a rectifying plate having a triangular prism shape in which the cross section in the XZ direction is a triangle is used. 図１３は、実施例２に係る蓄電モジュールの斜視図である。FIG. 13 is a perspective view of the power storage module according to the second embodiment. 図１４は、図１３における蓄電モジュールのＤ−Ｄ断面図である。14 is a DD cross-sectional view of the power storage module in FIG. 13. 図１５は、図１３における蓄電モジュールのＥ−Ｅ断面図である。15 is an EE cross-sectional view of the power storage module in FIG. 13.

以下に、本願の開示する蓄電モジュール及び蓄電池冷却方法の実施例を図面に基づいて詳細に説明する。なお、以下の実施例により本願の開示する蓄電モジュール及び蓄電池冷却方法が限定されるものではない。   Hereinafter, embodiments of a power storage module and a storage battery cooling method disclosed in the present application will be described in detail with reference to the drawings. In addition, the electrical storage module and storage battery cooling method which this application discloses are not limited by the following examples.

図１は、蓄電池積層体の斜視図である。図１に示すように、蓄電池積層体２は、複数の蓄電値１をまとめて一つの蓄電池としたものである。蓄電池１は、電気的な極性を持つ電極を有する。そして、蓄電池１同士が電極を介して直列接続又は並列接続された状態で組み合わさり、蓄電池積層体２を形成する。電極は、蓄電池１から延びる端子３を有しており、端子３により電極同士が電接続される。この蓄電池積層体２と後述する冷却部材などとを組み合わせて蓄電モジュールが生成される。   FIG. 1 is a perspective view of a battery stack. As shown in FIG. 1, the storage battery stack 2 is a storage battery in which a plurality of storage values 1 are combined. The storage battery 1 has an electrode having electrical polarity. Then, the storage batteries 1 are combined together in a state where they are connected in series or in parallel via electrodes to form the storage battery stack 2. The electrode has a terminal 3 extending from the storage battery 1, and the electrodes are electrically connected by the terminal 3. A power storage module is generated by combining the battery stack 2 and a cooling member described later.

蓄電池１には、外装がアルミニウムなどの金属材料を内包するラミネートフィルムなどの気密性軟包装材を用いたソフト容器や、アルミニウムやステンレスなどの金属材料で作られた角型缶や円筒缶などのハード容器に収めるものがある。本実施例では、説明のため、角型缶のハード容器を有する角形形状の蓄電池１を用いているが、これに限らず、ラミネートフィルムなどのソフト容器や円筒缶などのハード容器であってもよい。   The storage battery 1 includes a soft container using a hermetic flexible packaging material such as a laminate film that encloses a metal material such as aluminum, and a square can or a cylindrical can made of a metal material such as aluminum or stainless steel. Some are in hard containers. In the present embodiment, for the sake of explanation, the rectangular storage battery 1 having a square can hard container is used. However, the present invention is not limited to this, and a soft container such as a laminate film or a hard container such as a cylindrical can may be used. Good.

積層された蓄電池１は、アルミニウムや鉄、プラスチック樹脂を主材料とする固定部品や、粘着剤や粘着テープなどを用いた固定方法によって固定される。本実施例では、蓄電池１は、Ｘ方向に積層され、蓄電池積層体２を形成している。ここで、蓄電池１同士は、粘着剤や粘着テープなどで直接的に積層固定されている。ただし、並んだ蓄電池１の間に金属材料や樹脂材料で形成された固定部品を介して間接的に積層固定されてもよい。   The stacked storage battery 1 is fixed by a fixing method using aluminum, iron, or plastic resin as a main material, or a fixing method using an adhesive or an adhesive tape. In this embodiment, the storage battery 1 is stacked in the X direction to form a storage battery stack 2. Here, the storage batteries 1 are directly laminated and fixed with an adhesive, an adhesive tape, or the like. However, it may be indirectly laminated and fixed between the storage batteries 1 arranged side by side through a fixing part formed of a metal material or a resin material.

また、本実施例では、蓄電池１同士は、空隙なく積層固定されている。蓄電池１同士を空隙なく積層固定することで、蓄電モジュール全体の体積を小さくすることが可能である。   Moreover, in this embodiment, the storage batteries 1 are laminated and fixed without a gap. By stacking and fixing the storage batteries 1 without gaps, the volume of the entire power storage module can be reduced.

ただし、蓄電モジュールの体積に余裕がある場合、本実施例とは逆に、蓄電池１は、蓄電池１同士の間に空隙を設けて積層固定されてもよい。このように、空隙を設けることで、空隙を冷却媒体が通過して蓄電池１を冷やすことができ、蓄電池１の冷却効率を向上させることができる。   However, when there is a margin in the volume of the power storage module, the storage battery 1 may be laminated and fixed by providing a gap between the storage batteries 1 contrary to the present embodiment. Thus, by providing a space | gap, a cooling medium can pass through a space | gap and the storage battery 1 can be cooled, and the cooling efficiency of the storage battery 1 can be improved.

図２は、実施例１に係る蓄電モジュールの斜視図である。図２に示すように、蓄電モジュール１００は、蓄電池積層体２のＹ方向の両端に冷却媒体である空気を通して蓄電池１を冷却するための冷却部材が設けられている。冷却部材は、第１部材１０１及び第２部材１０２を有している。蓄電池積層体２のＹ方向の両端に配置された各冷却部材は、同じ構造を有している。   FIG. 2 is a perspective view of the power storage module according to the first embodiment. As shown in FIG. 2, the power storage module 100 is provided with cooling members for cooling the storage battery 1 through air as a cooling medium at both ends in the Y direction of the storage battery stack 2. The cooling member has a first member 101 and a second member 102. The cooling members disposed at both ends in the Y direction of the storage battery stack 2 have the same structure.

第１部材１０１及び第２部材１０２は、どのような材質で形成されてもよい。例えば、第１部材１０１及び第２部材１０２は、樹脂、金属、木材、セラミックス、ガラス又はゴムなどを主とする材料によって形成されてもよい。一般的には、第１部材１０１及び第２部材１０２は、形状加工が行いやすいプラスチック樹脂やアルミ合金、ステンレス又は鋼板などで形成されることができる。   The first member 101 and the second member 102 may be formed of any material. For example, the first member 101 and the second member 102 may be formed of a material mainly composed of resin, metal, wood, ceramics, glass, rubber, or the like. In general, the first member 101 and the second member 102 can be formed of plastic resin, aluminum alloy, stainless steel, steel plate, or the like that can be easily processed.

第１部材１０１及び第２部材１０２は、蓄電池積層体２側が凹んで空洞となっている。そして、第１部材１０１のＸ方向の一端には、空洞の中に空気を流入させるための流入口１０３が設けられている。第１部材１０１の空洞には、流入口１０３から流入した空気が流れる。そこで、第１部材１０１の空洞を「流路１１１」という。この流路１１１が、第１流路の一例にあたる。   The 1st member 101 and the 2nd member 102 are hollow in the storage battery laminated body 2 side being dented. An inlet 103 for allowing air to flow into the cavity is provided at one end of the first member 101 in the X direction. Air that flows in from the inlet 103 flows into the cavity of the first member 101. Therefore, the cavity of the first member 101 is referred to as “flow path 111”. This flow path 111 is an example of a first flow path.

また、第１部材１０１の空洞と第２部材１０２の空洞とは、Ｚ方向で連結している。すなわち、第１部材１０１の空洞にある空気は、第２部材１０２の空洞へと流れ込むことができる。ここで、流入口１０３から流入した空気は、流路１１１を経由して、第２部材１０２の空洞を流れていく。そこで、第２部材１０２の空洞を「流路１２１」という。この流路１２１が、第２流路の一例にあたる。   The cavity of the first member 101 and the cavity of the second member 102 are connected in the Z direction. That is, the air in the cavity of the first member 101 can flow into the cavity of the second member 102. Here, the air flowing in from the inflow port 103 flows through the cavity of the second member 102 via the flow path 111. Therefore, the cavity of the second member 102 is referred to as “flow path 121”. This flow path 121 is an example of a second flow path.

また、本実施例では、第１部材１０１と第２部材１０２との境界に、仕切板１０４が配置されている。図３は、本実施例に係る仕切板の説明図である。図３の上段の図は、仕切板１０４の平面図であり、下段の図は、仕切板１０４に整流板１０５を接続した状態の断面図である。本実施例に係る仕切板１０４は、図３の上段の図に示すように、蓄電池積層体２に接する側が開口したコの字型が連続している形状を有している。さらに、仕切板１０４のＺ方向の第２部材１０２とは逆側には、整流板１０５が設けられている。   In the present embodiment, the partition plate 104 is disposed at the boundary between the first member 101 and the second member 102. FIG. 3 is an explanatory diagram of the partition plate according to the present embodiment. The upper diagram in FIG. 3 is a plan view of the partition plate 104, and the lower diagram is a cross-sectional view in a state where the rectifying plate 105 is connected to the partition plate 104. As shown in the upper diagram of FIG. 3, the partition plate 104 according to the present embodiment has a shape in which a U-shape that is open on the side in contact with the storage battery stack 2 is continuous. Furthermore, a rectifying plate 105 is provided on the opposite side of the partition plate 104 from the second member 102 in the Z direction.

仕切板１０４及び整流板１０５は、第１部材１０１及び第２部材１０２と同様に、どのような材質で形成されてもよい。例えば、仕切板１０４及び整流板１０５は、樹脂、金属、木材、セラミックス、ガラス又はゴムなどを主とする材料によって形成されてもよい。   Like the first member 101 and the second member 102, the partition plate 104 and the current plate 105 may be formed of any material. For example, the partition plate 104 and the rectifying plate 105 may be formed of a material mainly composed of resin, metal, wood, ceramics, glass, rubber, or the like.

整流板１０５は、本実施例では、板状の部材である。そして、整流板１０５は、流路１１１を流れる空気の進行方向に直交する面を有するように配置されている。以下では、整流板１０５の流路１１１を流れる空気の進行方向に直交する面を、「整流面」という。整流板１０５は、本実施例では、仕切板１０４及び第１部材１０１の蓄電池積層体２と対向する面に固定されている。そして、整流面は、流路１１１のＹ方向の幅と同じ幅をＹ方向に有する面である。   The current plate 105 is a plate-like member in this embodiment. And the baffle plate 105 is arrange | positioned so that it may have a surface orthogonal to the advancing direction of the air which flows through the flow path 111. FIG. Hereinafter, a surface orthogonal to the traveling direction of the air flowing through the flow path 111 of the rectifying plate 105 is referred to as a “rectifying surface”. In this embodiment, the rectifying plate 105 is fixed to the surface of the partition plate 104 and the first member 101 facing the storage battery stack 2. The rectifying surface is a surface having the same width in the Y direction as the width of the flow path 111 in the Y direction.

図４は、図２における蓄電モジュールのＡ−Ａ断面図である。また、図５は、図２における蓄電モジュールのＢ−Ｂ断面図である。ただし、図２では、分かり易いように左側の第１部材１０１及び第２部材１０２を蓄電モジュール１００から離して記載しているが、図５及び６は、左側の第１部材１０１及び第２部材１０２を蓄電モジュール１００に接触した状態の断面図としている。   4 is a cross-sectional view of the power storage module taken along the line AA in FIG. FIG. 5 is a cross-sectional view taken along the line BB of the power storage module in FIG. However, in FIG. 2, the first member 101 and the second member 102 on the left side are separated from the power storage module 100 for easy understanding, but FIGS. 5 and 6 illustrate the first member 101 and the second member on the left side. 102 is a cross-sectional view in a state where the battery 102 is in contact with the power storage module 100.

整流板１０５は、図４に示すように、第１部材１０１のＸ方向の開口率、言い換えれば整流板１０５による流路１１１の開口率を制限する。図４では、空気は紙面奥に向かって流れる。流路１１１を流れる空気は、整流板１０５にぶつからない場合、流路１１１の整流板１０５で塞がれていない開口部分を通って流路１１１を流れていく。これに対して、整流板１０５にぶつかった空気は、流れる方向が変更され、流路１２１に流れ込む。   As shown in FIG. 4, the rectifying plate 105 limits the opening ratio of the first member 101 in the X direction, in other words, the opening ratio of the flow path 111 by the rectifying plate 105. In FIG. 4, air flows toward the back of the page. When the air flowing through the flow path 111 does not collide with the flow rectifying plate 105, the air flows through the flow path 111 through an opening portion of the flow path 111 that is not blocked by the flow rectifying plate 105. On the other hand, the air that collides with the rectifying plate 105 changes its flowing direction and flows into the flow path 121.

また、本実施例では、一例として、整流板１０５は、図５に示すように等間隔に９枚配置されている。すなわち、第１部材１０１の第２部材１０２に向かう空間は、９枚の整流板１０５によって１０個の空間に分割されている。ただし、設置される整流板１０５の枚数は、これに限らず、冷却効率に応じて決定されることが好ましい。   In the present embodiment, as an example, nine rectifying plates 105 are arranged at equal intervals as shown in FIG. That is, the space of the first member 101 toward the second member 102 is divided into ten spaces by the nine rectifying plates 105. However, the number of rectifying plates 105 to be installed is not limited to this and is preferably determined according to the cooling efficiency.

次に、整流板１０５の大きさについて説明する。図６は、図２における蓄電モジュールのＣ−Ｃ断面図である。整流面は、図６に示すように、流入口１０３から離れるようにＸ方向に進むにしたがって大きくなっている。すなわち、流入口１０３から離れるＸ方向に進むにしたがい、整流面のＹ方向に延びる辺と第１部材１０１の蓄電池積層体２に対向する面との距離が小さくなる。   Next, the size of the rectifying plate 105 will be described. 6 is a cross-sectional view of the power storage module taken along the line C-C in FIG. 2. As shown in FIG. 6, the rectifying surface becomes larger as it proceeds in the X direction away from the inflow port 103. That is, the distance between the side extending in the Y direction of the rectifying surface and the surface facing the storage battery stack 2 of the first member 101 becomes smaller as it proceeds in the X direction away from the inflow port 103.

具体的には、整流板１０５の大きさは、次の数式（１）を満たすように決定される。   Specifically, the size of the rectifying plate 105 is determined so as to satisfy the following formula (1).

Figure 2015191867
Figure 2015191867

ここで、ｈ（ｘ）は、整流板１０５により制限された第１部材１０１のＸ方向の開口率、言い換えれば整流板１０５による流路１１１の開口率を表す。開口率ｈ（ｘ）は、図６に示すように、Ｘ方向において空気の流れる方向に座標ｘを設定し、流路１１１の入り口である流入口１０３の位置をｘ＝０とし、流路１１１の全長をｘ＝１００として１００（％）に正規化される。さらに、Ａは開口率調整用のパラメータであり、｜Ａ｜＞３０を満たす。さらに、後述するように、Ａの値は、Ａ≧｜４０｜を満たすことがより好ましい。   Here, h (x) represents the aperture ratio in the X direction of the first member 101 limited by the rectifying plate 105, in other words, the aperture ratio of the flow path 111 by the rectifying plate 105. As shown in FIG. 6, the opening ratio h (x) is set such that the coordinate x is set in the direction of air flow in the X direction, the position of the inlet 103 that is the inlet of the channel 111 is x = 0, and the channel 111 Is normalized to 100 (%) where x = 100. Furthermore, A is a parameter for adjusting the aperture ratio and satisfies | A |> 30. Furthermore, as will be described later, it is more preferable that the value of A satisfies A ≧ | 40 |.

流入口１０３から流入した空気は、Ｘ方向の各位置の整流板１０５によってＺ方向に整流される。整流された各Ｘ方向の位置の空気の流れは、それぞれのほぼ均一な流速となる。この整流板１０５が、「整流部材」の一例にあたる。   The air flowing in from the inflow port 103 is rectified in the Z direction by the rectifying plate 105 at each position in the X direction. The rectified air flows at the positions in the X direction have substantially uniform flow rates. This rectifying plate 105 corresponds to an example of a “rectifying member”.

第２部材１０２は、Ｚ方向の第１部材１０１と逆側の面に空気の排出口１０６を有している。本実施例では、第２部材１０２のＺ方向の第１部材１０１と逆側の面はすべて開放されており、全面が排出口１０６となっている。すなわち、流路１２１を流れる空気は、排出口１０６から外部に排出される。   The second member 102 has an air outlet 106 on the surface opposite to the first member 101 in the Z direction. In the present embodiment, the entire surface of the second member 102 opposite to the first member 101 in the Z direction is open, and the entire surface is the discharge port 106. That is, the air flowing through the flow path 121 is discharged from the discharge port 106 to the outside.

さらに、図６を参照して、冷却部材における空気の流れを説明する。矢印２０１は、整流された空気の流れを表している。また、矢印２０２は、整流後の空気の流路１２１における流れを表している。   Furthermore, the flow of air in the cooling member will be described with reference to FIG. An arrow 201 represents the flow of rectified air. An arrow 202 represents the flow in the air flow path 121 after rectification.

空気は流入口１０３から、流路１１１へ流入する。そして、整流板１０５にぶつからなければ、流入した空気は、流路１１１を流入口１０３から離れるＸ方向へ進む。これに対して、流入した空気は、整流板１０５にぶつかると、流れる方向が流路１２１へ向かう方向に整流される。また、流路１１１を流れる空気は、第１部材１０１の流入口１０３と対向する面にぶつかると、流れる方向が流路１２１へ向かう方向に整流される。そして、整流された空気は、仕切板１０４を通過して、流路１２１へ流れ込む。流路１２１へ流れ込んだ空気は、そのまま、流路１２１を進んで、排出口１０６から外部に排出される。この一連の流れの中で、流路１１１及び１２１を流れる空気は、蓄電値積層体２に接するように流れている。そして、流路１１１及び１２１を流れる空気は、蓄電池１から熱を奪うことで、蓄電池１を冷却する。   Air flows from the inlet 103 into the flow path 111. And if it does not collide with the baffle plate 105, the inflowed air will progress to the X direction which leaves | separates the flow path 111 from the inflow port 103. On the other hand, when the inflowing air hits the rectifying plate 105, the flowing direction is rectified in the direction toward the flow path 121. Further, when the air flowing through the flow path 111 hits the surface of the first member 101 facing the inlet 103, the flow direction is rectified in the direction toward the flow path 121. Then, the rectified air passes through the partition plate 104 and flows into the flow path 121. The air that has flowed into the flow path 121 proceeds through the flow path 121 as it is, and is discharged from the discharge port 106 to the outside. In this series of flows, the air flowing through the flow paths 111 and 121 flows so as to be in contact with the stored electricity value stack 2. And the air which flows through the flow paths 111 and 121 cools the storage battery 1 by taking heat from the storage battery 1.

次に、図７を参照して、本実施例に係る蓄電モジュールにおける蓄電池１の冷却処理の流れについて説明する。図７は、実施例１に係る蓄電モジュール１００における蓄電池の冷却処理のフローチャートである。以下では、流路１１１及び１２１を流れる空気の流れの１つを例に説明する。   Next, with reference to FIG. 7, the flow of the cooling process of the storage battery 1 in the power storage module according to the present embodiment will be described. FIG. 7 is a flowchart of the storage battery cooling process in the power storage module 100 according to the first embodiment. Hereinafter, one of the air flows flowing through the flow paths 111 and 121 will be described as an example.

第１部材１０１は、外部から流路１１１への空気の流入を受ける（ステップＳ１）。   The first member 101 receives an inflow of air from the outside into the flow path 111 (step S1).

第１部材１０１は、流路１１１の空気の流れにより、蓄電池１を冷却する（ステップＳ２）。   The first member 101 cools the storage battery 1 by the air flow in the flow path 111 (step S2).

空気が整流板１０５又は流入口１０３に対向する第１部材１０１の壁にぶつかったか否かにより、冷却処理の分岐が発生する（ステップＳ３）。整流板１０５又は流入口１０３に対向する第１部材１０１の壁に空気がぶつからない場合（ステップＳ３：否定）、冷却処理は、ステップＳ２に戻る。   A branch of the cooling process occurs depending on whether or not the air collides with the wall of the first member 101 facing the current plate 105 or the inlet 103 (step S3). When air does not collide with the wall of the first member 101 facing the current plate 105 or the inlet 103 (No at Step S3), the cooling process returns to Step S2.

これに対して、整流板１０５又は流入口１０３に対向する第１部材１０１の壁に空気がぶつかった場合（ステップＳ３：肯定）、第１部材１０１は、整流板１０５又は壁により空気の流れを第２部材１０２に向かうように整流する（ステップＳ４）。   On the other hand, when the air collides with the wall of the first member 101 facing the rectifying plate 105 or the inflow port 103 (step S3: Yes), the first member 101 causes the air to flow through the rectifying plate 105 or the wall. Rectification is performed so as to face the second member 102 (step S4).

第２部材１０２は、第１部材１０１から仕切板１０４を通って流路１２１への空気の流入を受ける（ステップＳ５）。   The second member 102 receives the inflow of air from the first member 101 to the flow path 121 through the partition plate 104 (step S5).

第２部材１０２は、流路１２１の空気の流れにより、蓄電池１を冷却する（ステップＳ６）。   The 2nd member 102 cools the storage battery 1 with the flow of the air of the flow path 121 (step S6).

第２部材１０２は、排出口１０６から空気を外部に排出する（ステップＳ７）。   The second member 102 discharges air to the outside from the discharge port 106 (step S7).

次に、図８を参照して、本実施例に係る蓄電モジュールを用いた放熱実験の結果について説明する。図８は、実施例１に係る蓄電モジュールを用いた放熱実験の結果を表す図である。図８は、縦軸で風速を表し、横軸に空気の排出位置を表している。この実験では、流路１１１の全長を５５０ｍｍとした。また、整流板１０５は、９枚等間隔に設置した。図８における空気の排出位置ｘは、第１部材１０１の第２部材１０２へ向かう方向の等間隔に分割された１０区画の中心の位置を表している。   Next, with reference to FIG. 8, the result of the heat radiation experiment using the electrical storage module according to this example will be described. FIG. 8 is a diagram illustrating a result of a heat radiation experiment using the power storage module according to Example 1. In FIG. 8, the vertical axis represents the wind speed and the horizontal axis represents the air discharge position. In this experiment, the total length of the flow path 111 was set to 550 mm. Further, nine current plates 105 were installed at equal intervals. The air discharge position x in FIG. 8 represents the position of the center of 10 sections divided at equal intervals in the direction toward the second member 102 of the first member 101.

そして、１．５ｍ３／分の風量を有するシロッコファンを用いて流入口１０３から空気を流路１１１に送り込み、第２流路から排出される風速を計測した。 And using the sirocco fan which has an air volume of 1.5 m < 3 > / min, air was sent into the flow path 111 from the inflow port 103, and the wind speed discharged | emitted from the 2nd flow path was measured.

グラフ３０１は、整流板１０５を設置しない場合の風速を表す。グラフ３０２は、Ａ＝２０としたｈ（ｘ）を用いて決定された大きさを有する整流板１０５を用いた場合の風速を表す。グラフ３０３は、Ａ＝４０としたｈ（ｘ）を用いて決定された大きさを有する整流板１０５を用いた場合の風速を表す。グラフ３０４は、Ａ＝４００としたｈ（ｘ）を用いて決定された大きさを有する整流板１０５を用いた場合の風速を表す。グラフ３０５は、Ａ＝１００としたｈ（ｘ）を用いて決定された大きさを有する整流板１０５を用いた場合の風速を表す。グラフ３０６は、Ａ＝−１００としたｈ（ｘ）を用いて決定された大きさを有する整流板１０５を用いた場合の風速を表す。グラフ３０７は、Ａ＝−４０としたｈ（ｘ）を用いて決定された大きさを有する整流板１０５を用いた場合の風速を表す。グラフ３０８は、Ａ＝−２０としたｈ（ｘ）を用いて決定された大きさを有する整流板１０５を用いた場合の風速を表す。   A graph 301 represents the wind speed when the rectifying plate 105 is not installed. A graph 302 represents the wind speed when the rectifying plate 105 having a size determined using h (x) with A = 20 is used. A graph 303 represents the wind speed when the rectifying plate 105 having a size determined using h (x) with A = 40 is used. A graph 304 represents the wind speed when the rectifying plate 105 having a size determined using h (x) with A = 400 is used. A graph 305 represents the wind speed when the rectifying plate 105 having a size determined using h (x) with A = 100 is used. A graph 306 represents the wind speed when the rectifying plate 105 having a size determined using h (x) where A = −100 is used. A graph 307 represents the wind speed when the rectifying plate 105 having a size determined using h (x) where A = −40 is used. A graph 308 represents the wind speed when the rectifying plate 105 having a size determined using h (x) where A = −20 is used.

整流板１０５を設置しない場合、グラフ３０１で示されるように、位置ｘ＝１０での風速は０．５ｍ／ｓである。これに対して、位置ｘ＝１００での風速は４．５ｍ／ｓである。この場合、蓄電池積層体２に対する各蓄電池１の配置されている位置に応じて、風速の差が大きい。そのため、各蓄電池１の冷却効果にムラができ、蓄電池積層体２を形成する各蓄電池１の温度が均一にならない。そのため、特定の蓄電池１が急激に劣化するおそれがある。   When the rectifying plate 105 is not installed, as indicated by the graph 301, the wind speed at the position x = 10 is 0.5 m / s. On the other hand, the wind speed at the position x = 100 is 4.5 m / s. In this case, the difference in wind speed is large depending on the position where each storage battery 1 is disposed with respect to the storage battery stack 2. Therefore, the cooling effect of each storage battery 1 is uneven, and the temperature of each storage battery 1 forming the storage battery stack 2 is not uniform. Therefore, the specific storage battery 1 may deteriorate rapidly.

Ａ＝２０の条件で大きさを決定した整流板１０５を設置した場合、グラフ３０２に示すように、整流体を設置しない場合のグラフ３０１と比べて、位置ｘ＝１００での風速が小さくなり、風量差が小さくなっている。しかし、この場合も、各位置における風速は０．４〜３．１ｍ／ｓであり風速差が大きく、蓄電池積層体２を形成する各蓄電池１の温度が均一にならない。   When the rectifying plate 105 whose size is determined under the condition of A = 20 is installed, as shown in the graph 302, the wind speed at the position x = 100 is smaller than the graph 301 when the rectifying body is not installed, The air flow difference is small. However, also in this case, the wind speed at each position is 0.4 to 3.1 m / s, and the wind speed difference is large, and the temperature of each storage battery 1 forming the storage battery stack 2 is not uniform.

Ａ＝−２０の条件で大きさを決定した整流板１０５を設置した場合、グラフ３０８に示すように、位置ｘ＝１０での風速と位置ｘ＝１００での風速との差が大きく、蓄電池積層体２を形成する各蓄電池１の温度が均一にならない。   When the rectifying plate 105 whose size is determined under the condition of A = −20 is installed, as shown in the graph 308, the difference between the wind speed at the position x = 10 and the wind speed at the position x = 100 is large, and the storage battery stack The temperature of each storage battery 1 forming the body 2 is not uniform.

Ａ＝−４０の条件で大きさを決定した整流板１０５を設置した場合、グラフ３０７で示すように、Ａ＝−２０の場合に比べてｘ＝７０〜１００における風速が大きくなり、全体的な風速差は小さくなっている。すなわち、この場合、Ａ＝−２０の場合に比べて、蓄電池積層体２を形成する各蓄電池１の温度を均一にすることができる。   When the rectifying plate 105 whose size is determined under the condition of A = −40 is installed, as shown in the graph 307, the wind speed at x = 70 to 100 becomes larger than the case of A = −20, and the overall The wind speed difference is small. That is, in this case, the temperature of each storage battery 1 forming the storage battery stack 2 can be made uniform as compared with the case of A = −20.

Ａ＝−１００の条件で大きさを決定した整流板１０５を設置した場合、グラフ３０６で示すように、Ａ＝−４０の場合に比べてさらに全体的に風速の均一化がなされている。すなわち、この場合、Ａ＝−４０の場合に比べて、蓄電池積層体２を形成する各蓄電池１の温度をさらに均一にすることができる。   When the rectifying plate 105 whose size is determined under the condition of A = −100 is installed, as shown by the graph 306, the wind speed is made uniform as a whole as compared with the case of A = −40. That is, in this case, the temperature of each storage battery 1 forming the storage battery stack 2 can be made more uniform than in the case of A = −40.

Ａ＝４０の条件で大きさを決定した整流板１０５を設置した場合、グラフ３０３で示すように、Ａ＝−１００の場合と同じ程度もしくはそれ以上に全体的に風速の均一化がなされている。すなわち、この場合、Ａ＝−１００の場合に比べて、蓄電池積層体２を形成する各蓄電池１の温度を同等かそれ以上に均一化することができる。   When the rectifying plate 105 whose size is determined under the condition of A = 40 is installed, as shown in the graph 303, the wind speed is made uniform as a whole as much as or more than in the case of A = -100. . That is, in this case, the temperature of each storage battery 1 forming the storage battery stack 2 can be equalized or more uniform than in the case of A = −100.

Ａ＝４００又は１００の条件で大きさを決定した整流板１０５を設置した場合、グラフ３０４又は３０５で示すように、風速は０．９〜２．５ｍ／ｓの範囲に収まっており、Ａ＝４０の場合以上に全体的に風速の均一化がなされている。すなわち、この場合、Ａ＝４０の場合に比べて、蓄電池積層体２を形成する各蓄電池１の温度をより均一化することができる。   When the rectifying plate 105 whose size is determined under the condition of A = 400 or 100 is installed, as shown by the graph 304 or 305, the wind speed is within the range of 0.9 to 2.5 m / s, and A = Even in the case of 40, the wind speed is made uniform as a whole. That is, in this case, the temperature of each storage battery 1 forming the storage battery stack 2 can be made more uniform than in the case of A = 40.

以上の結果から、１．５ｍ３／分の風量を有するシロッコファンを用いた場合、流路１２１から排出される空気の風速差を２．５ｍ／ｓ以下にすることが好ましい。そこで、Ａ≧｜４０｜とすることが好ましい。 From the above results, when a sirocco fan having an air volume of 1.5 m 3 / min is used, it is preferable that the wind speed difference of the air discharged from the flow path 121 is 2.5 m / s or less. Therefore, it is preferable that A ≧ | 40 |.

ただし、ここで説明した実験結果は一例であり、流路１１１に空気を送り込むファンの性能や風量を変化させると、流路１２１から排出される空気の風速差の好適な値は変化する。しかし、その場合にも、好適なＡの範囲は変化せず、Ａ≧｜４０｜とすることが好ましい。   However, the experimental result described here is only an example, and when the performance and the air volume of the fan that sends air into the flow path 111 are changed, the preferable value of the wind speed difference of the air discharged from the flow path 121 changes. However, even in this case, the preferable range of A does not change, and it is preferable that A ≧ | 40 |.

さらに、図９Ａ及び図９Ｂを参照して、本実施例に係る蓄電モジュール１００による蓄電池１の冷却効果について説明する。図９Ａは、整流板を設けない場合の冷却状態を表す図である。また、図９Ｂは、Ａ＝４００とした整流板を設けた場合の冷却状態を表す図である。図９Ａ及び図９Ｂは、それぞれ縦軸で蓄電池１の上昇温度を表し、横軸で蓄電池積層体２内のどの蓄電池１かを表す。横軸の各値は、その値の蓄電池１が流入口１０３側から数えて何番目の蓄電池１かを表す。   Furthermore, with reference to FIG. 9A and 9B, the cooling effect of the storage battery 1 by the electrical storage module 100 which concerns on a present Example is demonstrated. FIG. 9A is a diagram illustrating a cooling state when a current plate is not provided. Moreover, FIG. 9B is a figure showing the cooling state at the time of providing the baffle plate made into A = 400. In FIG. 9A and FIG. 9B, the vertical axis represents the rising temperature of the storage battery 1, and the horizontal axis represents which storage battery 1 in the storage battery stack 2. Each value on the horizontal axis represents the number of storage batteries 1 counted from the inlet 103 side.

図９Ａに示すように、整流板１０５を設けない場合、蓄電池１の最高上昇温度が約２０℃であり、最低上昇温度が約１０℃である。すなわち、整流板１０５を設けない場合、温度差Ｔ１は約１０℃に達している。これに対して、図９Ｂに示すように、実施例１と同様に整流板１０５を設けた場合、蓄電池１の最高上昇温度は約１５℃に抑えられ、最低上昇温度は約１０℃である。すなわち、実施例１の蓄電モジュール１００を用いた場合、温度差Ｔ２は約５度に抑えられている。このように、整流板１０５を設けた蓄電モジュール１００は、整流板１０５を設けない場合に比べて、蓄電池１を均一に冷却することができる。   As shown in FIG. 9A, when the rectifying plate 105 is not provided, the maximum rise temperature of the storage battery 1 is about 20 ° C., and the minimum rise temperature is about 10 ° C. That is, when the rectifying plate 105 is not provided, the temperature difference T1 reaches about 10 ° C. On the other hand, as shown in FIG. 9B, when the rectifying plate 105 is provided as in the first embodiment, the maximum rise temperature of the storage battery 1 is suppressed to about 15 ° C., and the minimum rise temperature is about 10 ° C. That is, when the power storage module 100 of Example 1 is used, the temperature difference T2 is suppressed to about 5 degrees. As described above, the power storage module 100 provided with the rectifying plate 105 can cool the storage battery 1 more uniformly than when the rectifying plate 105 is not provided.

ここで、本実施例では、冷却媒体として空気を例に説明したが、冷却媒体は、これに限らず、蓄電池１から温度を奪うことができる気体であれば他のものを用いてもよい。   Here, in the present embodiment, air has been described as an example of the cooling medium. However, the cooling medium is not limited to this, and any other gas may be used as long as it can take the temperature from the storage battery 1.

以上に説明したように、本実施例に係る蓄電モジュールは、流入した特定の方向へ蓄電池積層体の側面に沿って進む空気を、特定の方向の異なる位置で整流板により整流し、積層面に沿って流れる向きに流向を変更し、蓄電池積層体の積層面に沿って流す。これにより、蓄電モジュールの体積を小さく抑えつつ、効率よく放熱することができる。   As described above, the power storage module according to the present embodiment rectifies the air that flows along the side surface of the storage battery stack in a specific direction that has flowed in at a different position in a specific direction by using a current plate. The flow direction is changed to the direction of flowing along, and the flow is made along the stacking surface of the battery stack. Thereby, heat can be efficiently radiated while keeping the volume of the power storage module small.

例えば、蓄電池間に設けられた一定の間隔に冷却媒体を流し蓄電池を冷却する蓄電モジュールの場合、蓄電モジュールを小型化すると間隔が狭くなり、冷却媒体を流す際の圧力損失が大きくなってしまい、流入する冷却媒体の流れを阻害する。これに対して、本実施例に係る蓄電モジュールでは、蓄電モジュールの体積を小さくしても冷却媒体が流れる流路の大きさに影響は少なく、圧力損失を小さく抑えることができるので、流入する冷却媒体の流れを妨げずに、蓄電池を効率よく冷却することができる。   For example, in the case of a power storage module that cools a storage battery by flowing a cooling medium at a constant interval provided between the storage batteries, when the power storage module is downsized, the interval is narrowed, and the pressure loss when the cooling medium flows is increased. The flow of the cooling medium flowing in is obstructed. On the other hand, in the power storage module according to the present embodiment, even if the volume of the power storage module is reduced, the size of the flow path through which the cooling medium flows is little affected, and the pressure loss can be suppressed. The storage battery can be efficiently cooled without obstructing the flow of the medium.

また、本実施例に係る蓄電モジュールは、冷却媒体の流路内に流れにぶつかるように設けられ、且つ流入口から離れるにしたがい開口率を狭くする整流体が設けられ、冷却媒体の流れを整流体により制御して各蓄電池の側面を流れる冷却媒体の流速を一定にしている。これにより、各蓄電池間の温度差を小さくすることができ、蓄電池を均一に冷却することができる。   In addition, the power storage module according to the present embodiment is provided so as to collide with the flow in the flow path of the cooling medium, and is provided with a rectifier that narrows the aperture ratio as the distance from the inflow port increases, thereby regulating the flow of the cooling medium. The flow rate of the cooling medium flowing on the side surface of each storage battery is made constant by controlling with fluid. Thereby, the temperature difference between each storage battery can be made small, and a storage battery can be cooled uniformly.

（変形例）
次に、実施例１に係る蓄電モジュールの変形例について説明する。実施例１では、吸入口１０３を有する第２部材１０２を第１部材１０１のＺ方向の端部に配置したが、第２部材１０２の位置はこれに限らない。 (Modification)
Next, a modified example of the power storage module according to the first embodiment will be described. In the first embodiment, the second member 102 having the suction port 103 is arranged at the end of the first member 101 in the Z direction. However, the position of the second member 102 is not limited to this.

例えば、図１における第１部材１０１のＺ方向の逆側の端部、すなわち図１に示された状態の上端部に、第２部材１０２が配置されてもよい。その場合、整流板１０５は、第１部材１０１の第２部材１０２と接する側、すなわち、第１部材の図１の下側に設けられる。   For example, the second member 102 may be arranged at the end of the first member 101 in FIG. 1 opposite to the Z direction, that is, at the upper end in the state shown in FIG. In that case, the current plate 105 is provided on the side of the first member 101 in contact with the second member 102, that is, on the lower side of the first member in FIG.

また、例えば、第２部材１０２は、第１部材１０１のＺ方向の中間、すなわち、第１部材１０１を分割するように設けられてもよい。その場合、整流板１０５は、第１部材１０１のＺ方向の両側に設けられる。そして、この場合も、整流板１０５の大きさは、開口率がｈ（ｘ）を満たすように決定される。   Further, for example, the second member 102 may be provided in the middle of the first member 101 in the Z direction, that is, so as to divide the first member 101. In that case, the current plate 105 is provided on both sides of the first member 101 in the Z direction. Also in this case, the size of the rectifying plate 105 is determined so that the aperture ratio satisfies h (x).

さらに、実施例１では、蓄電池１の積層方向に空気を流入させ、その流入した空気を整流して積層方向と直交する方向に空気を流したが、各蓄電池１の側面に沿ってバランスよく空気を流すことができれば、空気の流れはこれに限らない。例えば、積層方向と直交する方向に流入させ、流入した空気を整流して積層方向に流してもよい。   Further, in Example 1, air was introduced in the stacking direction of the storage batteries 1, and the inflowed air was rectified to flow the air in a direction orthogonal to the stacking direction, but the air was well balanced along the side surface of each storage battery 1. However, the air flow is not limited to this. For example, the air flowing in a direction orthogonal to the stacking direction may be rectified and flown in the stacking direction.

また、実施例１では、図３に示すように、仕切板１０４をコの字型を繋げた形状としたが、仕切板１０４は、流路１１１から流路１２１への十分な空気の移動が可能であれば、他の形状でもよい。例えば、図１０に示すように、格子状の孔を有している形状でもよい。図１０は、仕切板の他の例を示す図である。この場合、仕切板１０４のＺ方向の厚みの分だけ、蓄電池１への風の当たりを妨げるが、この幅は蓄電池１の大きさに比べて十分小さいので、蓄電池１の冷却効果への影響は軽微である。そのため、この形状の仕切板１０４を用いた蓄電モジュール１００であっても蓄電池１を冷却することができる。   Further, in Example 1, as shown in FIG. 3, the partition plate 104 has a U-shaped shape, but the partition plate 104 has sufficient air movement from the flow path 111 to the flow path 121. Other shapes are possible if possible. For example, as shown in FIG. 10, it may have a shape having grid-like holes. FIG. 10 is a diagram illustrating another example of the partition plate. In this case, the amount of wind on the storage battery 1 is prevented by the thickness of the partition plate 104 in the Z direction, but since this width is sufficiently smaller than the size of the storage battery 1, the effect on the cooling effect of the storage battery 1 is not affected. Minor. Therefore, even the power storage module 100 using the partition plate 104 having this shape can cool the storage battery 1.

さらに、仕切板１０４を設けなくてもよい。その場合、整流板１０５は、第１部材１０１の蓄電池積層体２と対向する面のみに固定される。この場合のように、第１部材１０１と第２部材１０２とを区別しなくてもよい。すなわち、第１部材１０１と第２部材１０２とは説明の都合上２つの部材として説明しているが、第１部材１０１と第２部材１０２とを合わせて１つの部材と考えてもよい。   Furthermore, the partition plate 104 may not be provided. In that case, the current plate 105 is fixed only to the surface of the first member 101 facing the storage battery stack 2. As in this case, the first member 101 and the second member 102 need not be distinguished. That is, although the first member 101 and the second member 102 are described as two members for convenience of description, the first member 101 and the second member 102 may be considered as one member.

また、本実施例では、整流板１０５を板状としたが、空気を整流する部材の形状は、第１部材１０１の開口率をｈ（ｘ）で決定される値に制限できれば、板状や矩形に限らない。例えば、整流板１０５は、ＸＺ方向の断面が三角形、台形、ひし形、五角形以上の多角形又は楕円形であってもよい。   Further, in this embodiment, the rectifying plate 105 is plate-shaped, but the shape of the member that rectifies air may be plate-shaped or the like if the aperture ratio of the first member 101 can be limited to a value determined by h (x). It is not limited to a rectangle. For example, the rectifying plate 105 may have a cross section in the XZ direction that is a triangle, a trapezoid, a diamond, a pentagon or more polygon, or an ellipse.

図１１は、ＸＺ方向の断面が三角形となる三角柱の形状を有する整流板を用いた場合の冷却部材のＸＺ断面の一例の図である。図１１に示すように、整流板１０５の形状がＸＺ方向の断面が三角形となる三角柱であっても、流入口１０３から流入し流路１１１を流れる空気は、矢印２０３のように流れ、流路１２１に向かうように整流される。そして、整流された空気は、流路１２１に流入する。その後、空気は、流路１２１を矢印２０４のように流れ、排出口１０６で排出される。   FIG. 11 is an example of an XZ cross section of the cooling member when a rectifying plate having a triangular prism shape in which the cross section in the XZ direction is a triangle is used. As shown in FIG. 11, even if the shape of the rectifying plate 105 is a triangular prism whose section in the XZ direction is a triangle, the air that flows in from the inlet 103 and flows through the flow path 111 flows as indicated by an arrow 203. Rectified to 121. Then, the rectified air flows into the flow path 121. Thereafter, the air flows through the flow path 121 as indicated by an arrow 204 and is discharged from the discharge port 106.

冷却媒体である空気が、矢印２０３及び２０４のように流れることで、蓄電池１は冷却される。したがって、ＸＺ方向の断面が三角形となる三角柱の形状を有する整流板１０５を用いても実施例１と同様の効果を得られる。   The storage battery 1 is cooled by the air as the cooling medium flowing as indicated by arrows 203 and 204. Therefore, the same effect as that of the first embodiment can be obtained even when the rectifying plate 105 having a triangular prism shape whose cross section in the XZ direction is a triangle is used.

さらに、図１１では、整流板１０５のＸＺ方向の断面の三角形の頂点が仕切板１０４に接している場合で説明したが、例えば、三角形の底辺が仕切板１０４に接する状態で整流板１０５を配置してもよい。図１２は、ＸＺ方向の断面が三角形となる三角柱の形状を有する整流板を用いた場合の冷却部材のＸＺ断面の他の例の図である。   Furthermore, in FIG. 11, the description has been given of the case where the vertex of the triangle of the cross section in the XZ direction of the rectifying plate 105 is in contact with the partition plate 104, but for example, the rectifying plate 105 is disposed in a state where the base of the triangle is in contact with the partition plate 104. May be. FIG. 12 is a diagram of another example of the XZ cross section of the cooling member when a rectifying plate having a triangular prism shape in which the cross section in the XZ direction is a triangle is used.

図１２に示すように、整流板１０５のＸＺ方向の断面の三角形の底辺が仕切板１０４に接する状態であっても、流路１１１を流れる空気は、矢印２０５のように流れ、流路１２１に向かうように整流される。そして、整流された空気は、流路１２１に流入し、矢印２０６のように流れ、排出口１０６で排出される。   As shown in FIG. 12, even when the bottom of the triangle of the cross section in the XZ direction of the rectifying plate 105 is in contact with the partition plate 104, the air flowing through the flow path 111 flows as indicated by an arrow 205 and flows into the flow path 121. Rectified to head. The rectified air flows into the flow path 121, flows as indicated by an arrow 206, and is discharged from the discharge port 106.

ここで、整流板１０５の間隔はＬ１であり、開口幅はＬ２である。この場合、整流板１０５の間隔における開口率であるＬ２／Ｌ１が、９０％以上になることが好ましい。   Here, the interval between the rectifying plates 105 is L1, and the opening width is L2. In this case, it is preferable that L2 / L1, which is the aperture ratio in the interval between the rectifying plates 105, is 90% or more.

また、排出口１０６は、排出ダクトと接続されていてもよい。その場合、流路１２１を流れる空気は排出口１０６を通過した後、排出ダクトの形状に則して流れる方向を変えてもよい。   Further, the discharge port 106 may be connected to a discharge duct. In that case, the air flowing through the flow path 121 may change the flow direction according to the shape of the discharge duct after passing through the discharge port 106.

以上に説明したように、実施例１の蓄電モジュールにおいて、流入口の位置、空気の流れる方向、仕切板の形状、整流板の形状を変更しても、実施例１と同様の効果を得ることができる。   As described above, even if the position of the inlet, the direction of air flow, the shape of the partition plate, and the shape of the rectifying plate are changed in the power storage module of Example 1, the same effect as in Example 1 can be obtained. Can do.

図１３は、実施例２に係る蓄電モジュールの斜視図である。本実施例に係る蓄電モジュール１００は、１つの流入口１０３から流入させた冷却媒体を分岐させて蓄電池１の２つの側面に流すことが実施例１と異なる。   FIG. 13 is a perspective view of the power storage module according to the second embodiment. The power storage module 100 according to the present embodiment is different from the first embodiment in that the cooling medium introduced from one inlet 103 is branched and allowed to flow on two side surfaces of the storage battery 1.

本実施例に係る蓄電モジュール１００の第１部材１０１は、蓄電池積層体２のＺ方向の一方の側面の全面を覆うように配置されている。そして、第１部材１０１のＸ方向の一端に、流入口１０３が設けられている。冷却媒体である空気が、流入口１０３から第１部材１０１の内部に流入する。   The 1st member 101 of the electrical storage module 100 which concerns on a present Example is arrange | positioned so that the whole surface of one side surface of the Z direction of the storage battery laminated body 2 may be covered. An inflow port 103 is provided at one end of the first member 101 in the X direction. Air that is a cooling medium flows into the first member 101 from the inlet 103.

図１４は、図１３における蓄電モジュールのＤ−Ｄ断面図である。図１４に示すように、第１部材１０１の内部空間である流路１１１には、流入する空気に直交する整流面を有する整流板１０５が、Ｘ方向に一定間隔で配置されている。また、整流板１０５は、流入口１０３に対してＹ方向に対称に２つずつ配置される。   14 is a DD cross-sectional view of the power storage module in FIG. 13. As shown in FIG. 14, rectifying plates 105 having rectifying surfaces orthogonal to the inflowing air are arranged at regular intervals in the X direction in the flow path 111 that is the internal space of the first member 101. Two rectifying plates 105 are arranged symmetrically in the Y direction with respect to the inlet 103.

さらに、整流板１０５は、第１部材１０１が覆う蓄電池積層体２の側面の端部に整流面の一辺が一致するように配置される。また、整流板１０５の整流面のＺ方向の長さは、流路１１１のＺ方向の全幅と一致する。すなわち、整流板１０５は、流路１１１のＺ方向の全幅を遮蔽する。   Furthermore, the rectifying plate 105 is arranged so that one side of the rectifying surface coincides with the end of the side surface of the storage battery stack 2 covered by the first member 101. Further, the length of the rectifying surface of the rectifying plate 105 in the Z direction coincides with the entire width of the flow path 111 in the Z direction. That is, the rectifying plate 105 shields the entire width of the flow path 111 in the Z direction.

また、整流板１０５は、流入口１０３から離れるＸ方向に進むにしたがい、整流面が大きくなる。すなわち、流入口１０３から離れるＸ方向に進むにしたがい、整流面のＹ方向の辺が、第１部材１０１の中央に近づく。具体的には、整流板１０５の大きさは、実施例１の数式（１）で示すｈ（ｘ）を満たすように決定される。   Further, as the rectifying plate 105 advances in the X direction away from the inlet 103, the rectifying surface becomes larger. That is, the side in the Y direction of the rectifying surface approaches the center of the first member 101 as it proceeds in the X direction away from the inflow port 103. Specifically, the size of the rectifying plate 105 is determined so as to satisfy h (x) represented by the formula (1) of the first embodiment.

流入口１０３から流入した空気は、第１部材１０１が覆う蓄電池積層体２の側面に沿って流路１０１を流入口１０３から離れるＸ方向に進む。そして、流入した空気は、矢印２０７で示すように、整流板１０５にぶつかって整流され、第１部材１０１が覆う蓄電池積層体２の側面に沿って流路１０１をＹ方向に進む。空気は、流入口１０３から流入し整流板１０５にぶつかりＹ方向に向かうように流路１１１を流れることで、蓄電池１が冷却される。   The air that flows in from the inflow port 103 travels in the X direction away from the inflow port 103 along the side surface of the battery stack 2 covered by the first member 101. Then, as shown by an arrow 207, the inflowing air collides with the rectifying plate 105 and is rectified, and proceeds along the side surface of the storage battery stack 2 covered by the first member 101 in the Y direction. The storage battery 1 is cooled by air flowing from the inflow port 103 and flowing through the flow path 111 so as to collide with the rectifying plate 105 and go in the Y direction.

ここで、空気は、流入口１０３に対してＹ方向に対称に配置された整流板１０５により、第１部材１０１のＹ方向に直交する２つの面のそれぞれに向かう流れに分岐される。また、空気は、Ｘ方向の各位置の整流板１０５によってＹ方向に整流される。整流された各Ｘ方向の位置の空気は、それぞれのほぼ均一な流速となる。   Here, the air is branched into flows toward the two surfaces orthogonal to the Y direction of the first member 101 by the rectifying plates 105 arranged symmetrically in the Y direction with respect to the inflow port 103. Further, the air is rectified in the Y direction by the rectifying plate 105 at each position in the X direction. The rectified air at each X-direction position has a substantially uniform flow velocity.

第２部材１０２は、第１部材１０１が覆う蓄電池積層体２の面の端部で第１部材１０１と連結し、蓄電池積層体２のＹ方向と直交する２つの面を覆う。そして、第２部材１０２は、Ｚ方向の第１部材１０１とは逆側の端部に排出口１０６を有している。   The second member 102 is connected to the first member 101 at the end of the surface of the storage battery stack 2 covered by the first member 101 and covers two surfaces orthogonal to the Y direction of the storage battery stack 2. And the 2nd member 102 has the discharge port 106 in the edge part on the opposite side to the 1st member 101 of the Z direction.

図１５は、図１３における蓄電モジュールのＥ−Ｅ断面図である。矢印２０８で示すように、整流板１０５で整流されＹ方向に向けて流れる空気が、第１部材１０１のＹ方向に直交する面にぶつかり、第２部材１０２の流路１２１に流入する。その後、空気は、蓄電池積層体２の側面に沿って流路１２１を流れ排出口１０６で排出される。空気が流路１２１を流れることで、蓄電池１が冷却される。   15 is an EE cross-sectional view of the power storage module in FIG. 13. As indicated by an arrow 208, air that is rectified by the rectifying plate 105 and flows in the Y direction collides with a surface orthogonal to the Y direction of the first member 101 and flows into the flow path 121 of the second member 102. Thereafter, the air flows through the flow path 121 along the side surface of the battery stack 2 and is discharged at the discharge port 106. The storage battery 1 is cooled by the air flowing through the flow path 121.

例えば、本実施例に係る蓄電モジュール１００の第１部材１０１及び第２部材１０２の寸法は以下のようにすることができる。第１部材１０１及び第２部材１０２のＸ方向の長さを２５０ｍｍとする。また、第１部材１０１のＹ方向の長さを２４０ｍｍとする。また、第２部材１０２のＹ方向の長さを２０ｍｍとする。また、蓄電モジュール１００のＹ方向の長さを２００ｍｍとする。また、第１部材１０１のＺ方向の高さを２０ｍｍとする。さらに、第２部材１０２のＺ方向の高さを２００ｍｍとする。このような寸法を有する蓄電モジュール１００によって蓄電値１を冷却することができる。   For example, the dimensions of the first member 101 and the second member 102 of the power storage module 100 according to the present embodiment can be as follows. The length in the X direction of the first member 101 and the second member 102 is 250 mm. The length of the first member 101 in the Y direction is 240 mm. The length of the second member 102 in the Y direction is 20 mm. Further, the length of the power storage module 100 in the Y direction is set to 200 mm. The height of the first member 101 in the Z direction is 20 mm. Further, the height of the second member 102 in the Z direction is set to 200 mm. The electricity storage value 1 can be cooled by the electricity storage module 100 having such dimensions.

以上に説明したように、本実施例に係る蓄電モジュールは、１つの流入口から流入した冷却媒体を２つに分岐し、蓄電池積層体の異なる側面に沿って流すことで、蓄電池を冷却する。このように、流入口を１つにした構成でも、蓄電モジュールの体積を小さく抑えつつ、蓄電池を効率よく冷却することができ、且つ、蓄電池を均一に冷却することができる。   As described above, the power storage module according to this embodiment cools the storage battery by branching the cooling medium flowing in from one inflow port into two and flowing along different side surfaces of the storage battery stack. As described above, even with the configuration in which one inflow port is provided, the storage battery can be efficiently cooled while the volume of the power storage module is kept small, and the storage battery can be uniformly cooled.

１ 蓄電池
２ 蓄電池積層体
３ 端子
１００ 蓄電モジュール
１０１ 第１部材
１０２ 第２部材
１０３ 流入口
１０４ 仕切板
１０５ 整流板
１０６ 排出口 DESCRIPTION OF SYMBOLS 1 Storage battery 2 Storage battery laminated body 3 Terminal 100 Power storage module 101 1st member 102 2nd member 103 Inlet 104 Partition plate 105 Current plate 106 Outlet

Claims (7)

複数の蓄電池が積層された蓄電池積層体と、
冷却媒体を前記蓄電池積層体に沿って所定方向に流す第１流路と、
前記第１流路の前記所定方向に複数配置され、前記所定方向に進むにしたがい前記第１流路における前記冷却媒体が通過する開口率を狭め、ぶつかった前記冷却媒体の流向を前記蓄電池積層体の積層方向へ延びる積層面へ向ける整流部材と、
前記整流部材により流向が変更された前記冷却媒体を前記積層面に沿って流す第２流路と
を備えたことを特徴とする蓄電モジュール。 A storage battery stack in which a plurality of storage batteries are stacked;
A first flow path for flowing a cooling medium in a predetermined direction along the storage battery stack,
A plurality of the first flow paths are arranged in the predetermined direction, and the opening ratio through which the cooling medium passes in the first flow path is narrowed in the predetermined direction, and the flow direction of the cooling medium that has collided is determined in the storage battery stack. A rectifying member directed to the laminated surface extending in the laminating direction of
A power storage module comprising: a second flow path for flowing the cooling medium whose flow direction is changed by the rectifying member along the stacked surface. 前記第１流路は、前記蓄電池積層体の積層方向に延び、前記冷却媒体を前記積層方向に流す空間であり、
前記第２流路は、前記第１流路に接続して前記積層方向に延び、且つ前記積層面を覆う空間である
ことを特徴とする請求項１に記載の蓄電モジュール。 The first flow path is a space that extends in the stacking direction of the storage battery stack and allows the cooling medium to flow in the stacking direction;
The power storage module according to claim 1, wherein the second flow path is a space that is connected to the first flow path and extends in the stacking direction and covers the stacked surface. 前記蓄電池積層体は、前記蓄電池が面一になるように積層され、
前記第１流路は、前記積層面上の積層方向の一端から他端まで延びる空間であり、
前記第２流路は、前記第１流路と接続して前記積層面の積層方向の一端から他端まで延び、且つ前記積層面の１つ又は複数を覆う空間を有する
ことを特徴とする請求項１又は２に記載の蓄電モジュール。 The storage battery stack is stacked so that the storage batteries are flush with each other,
The first flow path is a space extending from one end to the other end in the stacking direction on the stacking surface,
The second flow path has a space that is connected to the first flow path and extends from one end to the other end in the stacking direction of the stacked surface and covers one or more of the stacked surfaces. Item 3. The power storage module according to Item 1 or 2. 前記第１流路は、前記積層面の前記積層方向に直交する方向の一方の端部に配置されることを特徴とする請求項３に記載の蓄電モジュール。   4. The power storage module according to claim 3, wherein the first flow path is disposed at one end of the stacking surface in a direction orthogonal to the stacking direction. 前記第１流路は、前記蓄電池積層体の前記積層面の１つの第１積層面を覆い、
前記整流部材は、前記第１積層面に隣り合う第２積層面及び第３積層面へ前記冷却媒体の流向を向け、
前記第２流路は、前記第２積層面及び前記第３積層面を覆う
ことを特徴とする請求項３に記載の蓄電モジュール。 The first flow path covers one first laminated surface of the laminated surfaces of the storage battery laminate,
The rectifying member directs the flow direction of the cooling medium to the second laminated surface and the third laminated surface adjacent to the first laminated surface,
The power storage module according to claim 3, wherein the second flow path covers the second stacked surface and the third stacked surface. 前記第１流路の入り口を０とし前記第１流路の前記所定方向の長さを１００として表される前記第１流路の所定位置に配置された前記整流部材は、１００％に正規化された前記第１流路の開口率が、所定値で前記所定位置を除算した値の指数関数から１を減算した値となる大きさを有し、前記所定値の絶対値が４０以上である
ことを特徴とする請求項１〜５のいずれか一つに記載の蓄電モジュール。 The rectifying member arranged at a predetermined position of the first flow path represented by 0 as the entrance of the first flow path and 100 as the length of the first flow path in the predetermined direction is normalized to 100% The opening ratio of the first flow path has a magnitude that is a value obtained by subtracting 1 from an exponential function obtained by dividing the predetermined position by a predetermined value, and the absolute value of the predetermined value is 40 or more. The power storage module according to claim 1, wherein the power storage module is a power storage module. 複数の蓄電池が積層された蓄電池積層体に対する蓄電池冷却方法であって、
冷却媒体を前記蓄電池積層体に沿って所定方向に延びる第１流路に流し、
前記第１流路の前記所定方向に複数配置され、前記所定方向に進むにしたがい前記第１流路における前記冷却媒体が通過する開口率を狭め、ぶつかった前記冷却媒体の流向を前記蓄電池積層体の積層方向へ延びる積層面へ向ける整流部材により前記第１流路を流れる前記冷却媒体の流向を変更し、
流向が変更された前記冷却媒体を前記積層面に沿った第２流路に流す
ことを特徴とする蓄電池冷却方法。 A storage battery cooling method for a storage battery stack in which a plurality of storage batteries are stacked,
Flowing a cooling medium through a first flow path extending in a predetermined direction along the storage battery stack,
A plurality of the first flow paths are arranged in the predetermined direction, and the opening ratio through which the cooling medium passes in the first flow path is narrowed in the predetermined direction, and the flow direction of the cooling medium that has collided is determined in the storage battery stack. The flow direction of the cooling medium flowing through the first flow path is changed by a rectifying member directed to the stacking surface extending in the stacking direction,
The storage medium cooling method, wherein the cooling medium whose flow direction is changed is caused to flow in a second flow path along the laminated surface.
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