JP2010049842A - Battery pack for vehicle - Google Patents

Battery pack for vehicle Download PDF

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JP2010049842A
JP2010049842A JP2008211197A JP2008211197A JP2010049842A JP 2010049842 A JP2010049842 A JP 2010049842A JP 2008211197 A JP2008211197 A JP 2008211197A JP 2008211197 A JP2008211197 A JP 2008211197A JP 2010049842 A JP2010049842 A JP 2010049842A
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separator
insulating sheet
battery cell
battery cells
gap
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JP5305780B2 (en
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Takahiro Nakamura
隆広 中村
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

<P>PROBLEM TO BE SOLVED: To cool or heat adjacent square battery cells in an ideal state, by enlarging an effective heat radiation area while insulating them. <P>SOLUTION: A battery pack for a vehicle has a plurality of square battery cells 1 laminated through separators 2 with wind-blasting gaps 3 provided. The separator 2 is provided with an insulation sheet 10 arranged between opposing faces 1A of the adjacent square battery cells, and a pair of divided separators 11 fitted at either side of the insulation sheet 10 for pinching the same. The divided separator 11 has a frame part 12 at an outer periphery of the square battery cell 1, and a wind-blasting gap 3 is provided between both faces of the insulation sheet 10 and the square battery cell 1 in an opening 13 made by opening an inside of the frame part 12. Further, the dividing separator 11 has a wind-blasting opening 14 formed at the frame part 12 for blasting air to the wind-blasting gap. The battery pack cools or heats the square battery cells 1 by forcibly blasting air to the wind-blasting gaps 3 from the wind-blasting openings 14 of the separators 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、主として、ハイブリッドカーや電気自動車等の電動車両に搭載されて、車両を走行させるモータに電力を供給する車両用の組電池に関し、とくに電池を強制冷却する車両用の組電池に関する。   The present invention mainly relates to an assembled battery for a vehicle that is mounted on an electric vehicle such as a hybrid car or an electric vehicle and supplies electric power to a motor that runs the vehicle, and more particularly to an assembled battery for a vehicle that forcibly cools the battery.

車両用の組電池は、多数の電池セルを直列に接続して出力電圧を高く、出力電力を大きくしている。また、体積に対する充電容量を大きくすることから、多数の角形電池セルを積層状態に配置する組電池が開発されている。この組電池は、大電流で充放電されて電池セルの温度が上昇する。また、極めて高温な環境でも使用されることから、角形電池セルを強制冷却する必要がある。さらに、角形電池セルは、外装缶をアルミニウムなどの金属製として、放熱特性と強度を向上できるが、この角形電池セルは絶縁して積層する必要がある。外装缶が電位を有するからである。   An assembled battery for a vehicle has a large number of battery cells connected in series to increase output voltage and output power. Further, in order to increase the charging capacity with respect to the volume, an assembled battery in which a large number of rectangular battery cells are arranged in a stacked state has been developed. This assembled battery is charged and discharged with a large current, and the temperature of the battery cell rises. Moreover, since it is used also in an extremely high temperature environment, it is necessary to forcibly cool the prismatic battery cell. Furthermore, the prismatic battery cell can be improved in heat dissipation characteristics and strength by making the outer can made of a metal such as aluminum. However, the prismatic battery cell needs to be insulated and laminated. This is because the outer can has an electric potential.

積層される角形電池セルの間に、セパレータを挟着する組電池は開発されている(特許文献1及び2参照)。これらの特許文献に記載される組電池は、角形電池セルの間にセパレータを挟着して、送風隙間を設けている。また、セパレータを絶縁材として、隣接する角形電池セルを絶縁できる。
特開平10−112301号公報 特開2008−166191号公報
An assembled battery in which a separator is sandwiched between stacked rectangular battery cells has been developed (see Patent Documents 1 and 2). In the assembled battery described in these patent documents, a separator is sandwiched between rectangular battery cells to provide a ventilation gap. Moreover, an adjacent square battery cell can be insulated by using a separator as an insulating material.
Japanese Patent Laid-Open No. 10-112301 JP 2008-166191 A

特許文献1の組電池は、角形電池セルの間に金属板のセパレータを配置する。このセパレータは、表面に凹凸を設けて、角形電池セルの表面に送風隙間を設けている。また、特許文献2の組電池は、絶縁材のプラスチックを成形しているセパレータとし、これを角形電池セルの間に挟着している。このセパレータは、両面に凸条と溝を交互に設ける形状に成形して送風隙間を設けている。   In the assembled battery of Patent Document 1, a metal plate separator is disposed between rectangular battery cells. This separator is provided with unevenness on the surface, and a ventilation gap is provided on the surface of the rectangular battery cell. Moreover, the assembled battery of patent document 2 is made into the separator which shape | molded the plastic of an insulating material, and this is clamped between the square battery cells. This separator is formed into a shape in which ridges and grooves are alternately provided on both surfaces to provide an air blowing gap.

特許文献の組電池は、セパレータで積層している角形電池セルの間に送風隙間を設けることはできるが、角形電池セルの対向面を広い面積で送風隙間に開口できない。このため、角形電池セルの対向面を広い面積で送風隙間に露出して、有効放熱面積を大きくできない。たとえば、特許文献1のセパレータは、金属板を、矩形波等の凹凸形状とするので、送風隙間に露出する有効放熱面積が対向面の半分以下となる。また、特許文献2のセパレータも、プラスチック板の断面形状を矩形波状に成形するので、有効放熱面積は対向面の半分以下と小さくなる。このため、角形電池セルを広い面積で送風隙間に露出して、有効放熱面積を広くして、強制送風される冷却空気などで効率よく冷却できない。   The assembled battery disclosed in Patent Literature can provide a ventilation gap between the prismatic battery cells stacked with the separator, but cannot open the facing surface of the prismatic battery cell in a large area to the ventilation gap. For this reason, the opposing surface of a square battery cell is exposed to a ventilation gap by a large area, and an effective heat radiation area cannot be enlarged. For example, since the separator of patent document 1 makes a metal plate uneven | corrugated shape, such as a rectangular wave, the effective thermal radiation area exposed to a ventilation gap becomes below half of an opposing surface. Moreover, since the separator of patent document 2 shape | molds the cross-sectional shape of a plastic plate in rectangular wave shape, an effective thermal radiation area becomes small below half of an opposing surface. For this reason, a square battery cell is exposed to a ventilation gap in a wide area, and the effective heat radiation area is widened, so that it cannot be efficiently cooled with cooling air that is forcedly blown.

さらに、特許文献1のセパレータは、金属板を凹凸形状に加工するので、薄くできるが隣接する角形電池セルを絶縁できない。このため、角形電池セルの外装缶を絶縁材のプラスチックなどで成形し、あるいは外装缶の表面を絶縁材で被覆する必要がある。絶縁材は熱伝導率が低く、内部の熱を効率よく表面に伝導できない。   Furthermore, since the separator of patent document 1 processes a metal plate in uneven | corrugated shape, it can be made thin, but cannot insulate the adjacent square battery cell. For this reason, it is necessary to mold the outer can of the rectangular battery cell with an insulating plastic or the like, or to coat the surface of the outer can with an insulating material. Insulating materials have low thermal conductivity and cannot efficiently conduct internal heat to the surface.

特許文献2のセパレータは、隣接する角形電池セルを絶縁して送風隙間を設けることはできるが、送風隙間が狭くなって、冷却気体の圧力損失が大きくなる。それは、セパレータの厚さが送風隙間を狭くするからである。圧力損失の大きい送風隙間は、ここに強制送風する冷却ファンの消費電力が大きく、強制送風する冷却気体の騒音レベルも高くなる。   Although the separator of patent document 2 can insulate an adjacent square battery cell and can provide a ventilation gap, a ventilation gap becomes narrow and the pressure loss of cooling gas becomes large. This is because the thickness of the separator narrows the air blowing gap. In the air blowing gap with a large pressure loss, the power consumption of the cooling fan forcedly blown here is large, and the noise level of the cooling gas forcedly blown is also high.

本発明は、以上の欠点を解決することを目的に開発されたものである。本発明の重要な目的は、角形電池セルを絶縁しながら理想的な状態で冷却又は加温できる車両用の組電池を提供することにある。
また、本発明の他の大切な目的は、隣接する角形電池セルを絶縁しながら有効放熱面積を大きくし、また、送風隙間に強制送風する冷却気体の圧力損失を小さくできる車両用の組電池を提供することにある。
The present invention has been developed for the purpose of solving the above drawbacks. An important object of the present invention is to provide an assembled battery for a vehicle that can cool or heat in an ideal state while insulating rectangular battery cells.
Another important object of the present invention is to provide an assembled battery for a vehicle that can increase the effective heat dissipation area while insulating adjacent rectangular battery cells, and can reduce the pressure loss of the cooling gas forcedly blown into the ventilation gap. It is to provide.

課題を解決するための手段及び発明の効果Means for Solving the Problems and Effects of the Invention

本発明の車両用の組電池は、前述の目的を達成するために以下の構成を備える。
車両用の組電池は、複数の角形電池セル1をセパレータ2を介して送風隙間3を設ける状態で積層している。セパレータ2は、隣接する角形電池セル1の対向面1Aの間に配設してなる絶縁シート10と、この絶縁シート10の両側にあって絶縁シート10を挟着してなる一対の分割セパレータ11とを備えている。分割セパレータ11は、角形電池セル1の外周に沿う枠部12を有し、この枠部12の内側を開口して、この開口部13において、絶縁シート10の両面と角形電池セル1の間に送風隙間3を設けている。さらに、分割セパレータ11は、送風隙間3に気体を送風する送風開口14を枠部12に有する。組電池は、セパレータ2の送風開口14から送風隙間3に強制送風して角形電池セル1を冷却し、又は加温する。
The assembled battery for a vehicle of the present invention has the following configuration in order to achieve the above-described object.
An assembled battery for a vehicle is formed by stacking a plurality of rectangular battery cells 1 with a blower gap 3 provided through a separator 2. The separator 2 includes an insulating sheet 10 disposed between the opposing surfaces 1A of adjacent rectangular battery cells 1 and a pair of divided separators 11 formed on both sides of the insulating sheet 10 and sandwiching the insulating sheet 10 therebetween. And. The divided separator 11 has a frame portion 12 that extends along the outer periphery of the rectangular battery cell 1, and the inside of the frame portion 12 is opened, and in this opening portion 13, between the both surfaces of the insulating sheet 10 and the rectangular battery cell 1. A ventilation gap 3 is provided. Further, the divided separator 11 has a blowing opening 14 in the frame portion 12 for blowing gas into the blowing gap 3. The assembled battery forcibly blows air from the air blowing opening 14 of the separator 2 to the air gap 3 to cool or warm the rectangular battery cell 1.

以上の車両用の組電池は、角形電池セルを絶縁しながら理想的な状態で冷却又は加温できる特徴がある。さらに、本発明の車両用の組電池は、隣接する角形電池セルを絶縁しながら送風隙間に露出する有効放熱面積を大きくでき、また、送風隙間に強制送風する冷却気体の圧力損失を小さくできる特徴も実現する。有効放熱面積を広くできるのは、積層する角形電池セルの間に絶縁シートを配設し、この絶縁シートの両側を、角形電池セルの外周に沿う枠部の分割セパレータで挟着する独特の構造のセパレータを積層する角形電池セルの間に配設しているからである。とくに、絶縁シートの両側を枠部の分割セパレータで挟着する構造は、絶縁シートを薄くできるので、送風隙間の断面積を大きく、すなわち圧力損失を小さくできる。また、角形電池セルの対向面のほぼ全面を露出できることから、有効放熱面積を著しく大きくできる。   The assembled battery for vehicles described above has a characteristic that it can be cooled or heated in an ideal state while insulating the rectangular battery cells. Furthermore, the assembled battery for a vehicle of the present invention can increase the effective heat radiation area exposed to the air gap while insulating adjacent rectangular battery cells, and can reduce the pressure loss of the cooling gas forcedly blown into the air gap. Also realized. The effective heat dissipation area can be widened because of the unique structure in which an insulating sheet is arranged between the stacked rectangular battery cells, and both sides of this insulating sheet are sandwiched by divided separators in the frame portion along the outer periphery of the rectangular battery cell. It is because it arrange | positions between the square battery cells which laminate | stack this separator. In particular, the structure in which both sides of the insulating sheet are sandwiched by the divided separators of the frame portion can make the insulating sheet thin, so that the cross-sectional area of the air blowing gap can be increased, that is, the pressure loss can be reduced. Moreover, since the substantially whole surface of the opposing surface of the rectangular battery cell can be exposed, the effective heat radiation area can be remarkably increased.

ちなみに、本発明の組電池は、特許文献2の組電池に比較して、角形電池セルの有効放熱面積を2.7倍と極めて大きくし、また、送風隙間の断面積を約80%も大きくして、圧力損失を70%も低減できる。このことは、角形電池セルの冷却気体による効率的な冷却を実現し、さらに強制送風する強制送風機構を小さく省エネルギー化できる特徴を実現する。   By the way, the assembled battery of the present invention has an effective heat radiation area of the square battery cell as much as 2.7 times larger than the assembled battery of Patent Document 2, and the cross-sectional area of the air gap is about 80% larger. Thus, the pressure loss can be reduced by 70%. This implement | achieves the characteristic which can implement | achieve efficient cooling with the cooling gas of a square battery cell, and also can make the forced ventilation mechanism forcedly ventilated small and can save energy.

本発明の車両用の組電池は、一対の分割セパレータ11を、絶縁シート10との挟着面を嵌合構造として連結することができる。
この組電池は、一対の分割セパレータを位置ずれしないように連結して角形電池セルの間に配置できる。
The assembled battery for a vehicle of the present invention can connect a pair of divided separators 11 with a sandwiching surface with the insulating sheet 10 as a fitting structure.
This assembled battery can be disposed between prismatic battery cells by connecting a pair of divided separators so as not to be displaced.

本発明の車両用の組電池は、一対の分割セパレータ11の挟着面に設けた嵌合構造を、一方の分割セパレータ11に設けた嵌着凸部16と、この嵌着凸部16を挿入する嵌着凹部17とすることができる。さらに、絶縁シート10に、嵌着凸部16を挿入する貫通孔10Aを設けて、嵌着凸部16を絶縁シート10の貫通孔10Aに貫通して嵌着凹部17に挿入して、一対の分割セパレータ11と絶縁シート10とを定位置に連結することができる。
この組電池は、一対の分割セパレータと絶縁シートとを位置ずれしないように連結して、角形電池セルの間に配設できる。
In the assembled battery for a vehicle according to the present invention, a fitting structure provided on a sandwiching surface of a pair of divided separators 11 is inserted into a fitting convex part 16 provided on one divided separator 11 and the fitting convex part 16 is inserted. It can be set as the fitting recessed part 17 to do. Furthermore, the insulating sheet 10 is provided with a through hole 10A for inserting the fitting convex portion 16, the fitting convex portion 16 is inserted into the fitting concave portion 17 through the through hole 10A of the insulating sheet 10, and a pair of The division separator 11 and the insulating sheet 10 can be connected to a fixed position.
The assembled battery can be disposed between the square battery cells by connecting the pair of divided separators and the insulating sheet so as not to be displaced.

本発明の車両用の組電池は、分割セパレータ11の枠部12を、両側の縦枠12Aと上下の横枠12Bとで構成し、両側の縦枠12Aに送風開口14を設けて、縦枠12Aの中間に両端を縦枠12Aに連結してなる支持ロッド15を設けて、この支持ロッド15で絶縁シート10を挟着すると共に、絶縁シート10を挟着する一対の支持ロッド15を隣接する角形電池セル1の対向面1Aに挟着することができる。
この組電池は、絶縁シートを隣接する角形電池セルの中間に正確に配置できると共に、支持ロッドで角形電池セルの膨張を防止できる特徴がある。
In the assembled battery for a vehicle according to the present invention, the frame portion 12 of the divided separator 11 is composed of a vertical frame 12A on both sides and an upper and lower horizontal frame 12B, and a ventilation opening 14 is provided on each vertical frame 12A. A support rod 15 having both ends connected to the vertical frame 12A is provided in the middle of 12A, and the insulating sheet 10 is sandwiched by the support rod 15 and a pair of support rods 15 that sandwich the insulating sheet 10 are adjacent to each other. It can be sandwiched between the opposing surfaces 1 </ b> A of the prismatic battery cell 1.
This assembled battery is characterized in that the insulating sheet can be accurately placed in the middle of the adjacent rectangular battery cells and the expansion of the rectangular battery cells can be prevented by the support rod.

以下、本発明の実施例を図面に基づいて説明する。ただし、以下に示す実施例は、本発明の技術思想を具体化するための車両用の組電池を例示するものであって、本発明は車両用の組電池を以下のものに特定しない。   Embodiments of the present invention will be described below with reference to the drawings. However, the following embodiment exemplifies an assembled battery for a vehicle for embodying the technical idea of the present invention, and the present invention does not specify the assembled battery for a vehicle as follows.

さらに、この明細書は、特許請求の範囲を理解しやすいように、実施例に示される部材に対応する番号を、「特許請求の範囲」および「課題を解決するための手段の欄」に示される部材に付記している。ただ、特許請求の範囲に示される部材を、実施例の部材に特定するものでは決してない。   Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

図1に示す車両用の組電池は、主として、エンジンとモータの両方で走行するハイブリッドカーや、モータのみで走行する電気自動車などの電動車両の電源に最適である。ただし、ハイブリッドカーや電気自動車以外の車両にも使用される。   The assembled battery for a vehicle shown in FIG. 1 is mainly suitable for a power source of an electric vehicle such as a hybrid car that runs with both an engine and a motor and an electric vehicle that runs with only a motor. However, it is also used for vehicles other than hybrid cars and electric cars.

図1ないし図4に示す組電池は、複数の角形電池セル1をセパレータ2を介して送風隙間3を設ける状態で積層している。組電池の両端側には、エンドプレート4を配置して、エンドプレート4で組電池の両側を狭持した状態で、連結固定具5にて固定している。エンドプレート4は、角形電池セル1の外形と同じ形状と寸法の四角形として、組電池を両端面から挟着して固定している。この組電池は、図1と図3に示すように、対向位置に送風ダクト6を設けて、送風ダクト6から送風隙間3に冷却気体を強制送風して、角形電池セル1を冷却し、あるいは加温する。   In the assembled battery shown in FIGS. 1 to 4, a plurality of rectangular battery cells 1 are stacked with a blower gap 3 provided through a separator 2. End plates 4 are arranged at both ends of the assembled battery, and are fixed by the connecting fixture 5 with both ends of the assembled battery held between the end plates 4. The end plate 4 is a quadrangle having the same shape and size as the outer shape of the prismatic battery cell 1, and the assembled battery is sandwiched and fixed from both end faces. As shown in FIGS. 1 and 3, this assembled battery is provided with a blower duct 6 at an opposed position, forcing cooling gas from the blower duct 6 to the blower gap 3 to cool the rectangular battery cell 1, or Warm up.

角形電池セル1は、幅よりも薄い薄型の角形電池で、互いに平行な姿勢としてセパレータ2を挟んで積層している。角形電池セル1は、図5に示すように、上面の両端部に正負の出力端子7を突出させて固定している。出力端子7を突出させる位置は、正極と負極が左右対称となる位置としている。これにより、角形電池セル1を裏返して重ねると、正極と負極とを重ね合わせることができ、直列接続を容易に行える。出力端子7は、それぞれ断面L字状に折曲され、さらに折曲部には連結穴を開口している。これらの出力端子7は、図4に示すように、連結穴に連結ボルト8を挿通して互いに積層される折曲部を連結している。とくに、正負の出力端子7は、図5に示すように互いに逆方向に折曲されると共に、互いに隣接する電池セル同士では、正負の出力端子7が交互に逆向きに折曲されている。これらの出力端子7は、隣接する角形電池セル1の間で、直接接続可能な大きさ及び形状に形成している。これにより、隣接する電池間で正極と負極を直接接続して、複数の電池を直列に接続している。ただ、出力端子は、金属板のバスバーを接続して、隣接する角形電池セルを直列に接続することもできる。以上のように、角形電池セル1を直列に接続する組電池は、出力電圧を高くして出力を大きくできる。ただし、組電池は、角形電池セルを並列と直列に接続することもできる。   The prismatic battery cell 1 is a thin prismatic battery that is thinner than the width, and is stacked with a separator 2 sandwiched between them in a parallel posture. As shown in FIG. 5, the prismatic battery cell 1 has positive and negative output terminals 7 protruding and fixed at both ends of the upper surface. The position where the output terminal 7 is projected is a position where the positive electrode and the negative electrode are symmetrical. Thereby, if the square battery cell 1 is turned upside down, the positive electrode and the negative electrode can be overlapped, and series connection can be easily performed. Each of the output terminals 7 is bent into an L-shaped cross section, and a connecting hole is opened in the bent portion. As shown in FIG. 4, these output terminals 7 are connected to bent portions that are stacked on each other by inserting connecting bolts 8 through connecting holes. In particular, the positive and negative output terminals 7 are bent in opposite directions as shown in FIG. 5, and the positive and negative output terminals 7 are alternately bent in opposite directions between adjacent battery cells. These output terminals 7 are formed in a size and shape that can be directly connected between adjacent rectangular battery cells 1. Thereby, a positive electrode and a negative electrode are directly connected between adjacent batteries, and a plurality of batteries are connected in series. However, the output terminal can be connected to a series of adjacent rectangular battery cells by connecting a metal plate bus bar. As described above, the battery pack in which the rectangular battery cells 1 are connected in series can increase the output voltage and increase the output. However, the assembled battery can also connect the square battery cells in parallel and in series.

セパレータ2は、互いに隣接する角形電池セル1の間に挟着されて、隣接する角形電池セル1を一定の間隔に保持して絶縁すると共に、角形電池セル1の対向面1Aに送風隙間3を設ける。図6と図7のセパレータ2は、隣接する角形電池セル1の対向面1Aの間に配設される絶縁シート10と、この絶縁シート10の両側にあって絶縁シート10を挟着する一対の分割セパレータ11とを備える。   The separator 2 is sandwiched between the adjacent rectangular battery cells 1 to insulate the adjacent rectangular battery cells 1 while keeping the adjacent rectangular battery cells 1 at a constant interval. Provide. The separator 2 in FIGS. 6 and 7 includes a pair of insulating sheets 10 disposed between opposing surfaces 1A of adjacent rectangular battery cells 1 and a pair of sandwiching the insulating sheets 10 on both sides of the insulating sheet 10. A split separator 11.

絶縁シート10は、絶縁材のシートで、たとえば厚さを0.1mmないし0.5mmとしている。絶縁シート10は薄くして、送風隙間3の圧力損失をより小さくできる。ただ、絶縁シート10は、薄くなると強度が低下して、隣接する角形電池セル1を長期間にわたって安定して確実に絶縁するのが難しくなる。したがって、絶縁シート10の厚さは、材質や要求される強度と圧力損失とを考慮して最適値に特定される。絶縁シート10は、プラスチックシートである。絶縁シート10には、絶縁特性に加えて、優れた熱伝導特性のシート、たとえば熱伝導特性の優れた粉末を絶縁材のプラスチックに充填しているシートも使用できる。この絶縁シート10は、全体の温度を均一化することで、温度むらを少なくする効果がある。さらに、絶縁シート10には、不織布や絶縁紙も使用できる。また、マイカなどの無機質シートも使用できる。絶縁シート10は、隣接する角形電池セル1の対向面1Aを絶縁するので、その外形は、角形電池セル1の外形にほぼ等しく、あるいは角形電池セルの外形よもわずかに大きく、あるいは小さくする。角形電池セル1の外形よりも小さい絶縁シート10は、絶縁シート10で絶縁されない角形電池セルの対向面1Aを、分割セパレータ11の枠部12で絶縁する。   The insulating sheet 10 is an insulating material sheet having a thickness of 0.1 mm to 0.5 mm, for example. The insulating sheet 10 can be made thin to reduce the pressure loss of the air blowing gap 3. However, when the insulating sheet 10 becomes thin, the strength decreases, and it becomes difficult to stably and reliably insulate the adjacent rectangular battery cells 1 over a long period of time. Therefore, the thickness of the insulating sheet 10 is specified to an optimum value in consideration of the material, required strength, and pressure loss. The insulating sheet 10 is a plastic sheet. As the insulating sheet 10, in addition to the insulating characteristics, a sheet having excellent heat conduction characteristics, for example, a sheet in which a powder having excellent heat conduction characteristics is filled in an insulating plastic can be used. The insulating sheet 10 has the effect of reducing temperature unevenness by making the entire temperature uniform. Furthermore, a nonwoven fabric or insulating paper can also be used for the insulating sheet 10. An inorganic sheet such as mica can also be used. Since the insulating sheet 10 insulates the opposing surface 1A of the adjacent rectangular battery cells 1, the outer shape thereof is approximately equal to the outer shape of the rectangular battery cell 1, or slightly larger or smaller than the outer shape of the rectangular battery cell. The insulating sheet 10 smaller than the outer shape of the rectangular battery cell 1 insulates the facing surface 1A of the rectangular battery cell that is not insulated by the insulating sheet 10 with the frame portion 12 of the divided separator 11.

分割セパレータ11は、角形電池セル1の外周に沿う枠部12を有し、この枠部12の内側を開口している。枠部12の内側にできる開口部13を送風隙間3として、有効放熱面積を大きくしている。すなわち、分割セパレータ11の開口部13において、絶縁シート10の表面と角形電池セル1の間に送風隙間3が形成される。この分割セパレータ11は、枠部12に送風開口14を設けて、この送風開口14から送風隙間3に冷却気体を強制送風するようにしている。また、組電池が極低温環境で使用される状態にあっては、送風開口14から送風隙間3に温風を強制送風して、角形電池セル1を加温することもできる。   The divided separator 11 has a frame portion 12 along the outer periphery of the rectangular battery cell 1, and the inside of the frame portion 12 is opened. The opening 13 formed inside the frame portion 12 is used as the air blowing gap 3 to increase the effective heat radiation area. That is, the air gap 3 is formed between the surface of the insulating sheet 10 and the rectangular battery cell 1 in the opening 13 of the divided separator 11. The divided separator 11 is provided with a ventilation opening 14 in the frame portion 12 so as to forcibly blow cooling gas from the ventilation opening 14 into the ventilation gap 3. Further, when the assembled battery is used in an extremely low temperature environment, the rectangular battery cell 1 can be heated by forcibly blowing warm air from the air blowing opening 14 to the air blowing gap 3.

図の分割セパレータ11の枠部12は、角形電池セル1の両側に沿う縦枠12Aと、上下縁部に沿う横枠12Bとを連結した四角形としている。この図の分割セパレータ11は、縦枠12Aを角形電池セル1の外周面に沿う板状とし、横枠12Bの断面形状をL字状としている。縦枠12Aは、角形電池セル1に挟着される状態で、角形電池セル1の両側面の全体をカバーする幅としている。また、縦枠12Aは、絶縁シート10を挟着して一対の分割セパレータ11を連結する状態で、絶縁シート10の両側にスリット状に送風開口14を設けている。このセパレータ2は、冷却気体を水平方向に強制送風して、角形電池セル1を冷却する。L字状の横枠12Bは、角形電池セル1の上下面に沿う水平部12aと、隣接する角形電池セル1の間に挟着される垂直部12bとを連結する形状に成形している。角形電池セル1の上面に沿う水平部12aは、角形電池セル1の上面に設けている出力端子7や安全弁9の開口部を閉塞しないように、出力端子7や安全弁9の開口部を露出させる形状としている。角形電池セル1の下面に沿う水平部12aは、縦枠12Aと同じ幅として、角形電池セル1に挟着される状態で、角形電池セル1の下面全体をカバーするようにしている。このセパレータ2は、角形電池セル1の間に挟着されて、積層される角形電池セル1の両側面と下面をセパレータ2でカバーして絶縁できる。   The frame part 12 of the divided separator 11 in the figure is a quadrilateral that connects a vertical frame 12A along both sides of the prismatic battery cell 1 and a horizontal frame 12B along the upper and lower edges. In the divided separator 11 in this figure, the vertical frame 12A has a plate shape along the outer peripheral surface of the rectangular battery cell 1, and the cross-sectional shape of the horizontal frame 12B has an L shape. The vertical frame 12 </ b> A has a width that covers the entire side surfaces of the prismatic battery cell 1 while being sandwiched between the prismatic battery cells 1. Further, the vertical frame 12 </ b> A is provided with a blower opening 14 in a slit shape on both sides of the insulating sheet 10 in a state where the insulating sheet 10 is sandwiched and the pair of divided separators 11 are connected. The separator 2 cools the prismatic battery cell 1 by forcibly blowing cooling gas in the horizontal direction. The L-shaped horizontal frame 12B is formed in a shape that connects the horizontal portion 12a along the upper and lower surfaces of the prismatic battery cell 1 and the vertical portion 12b sandwiched between the adjacent prismatic battery cells 1. The horizontal portion 12a along the upper surface of the rectangular battery cell 1 exposes the opening of the output terminal 7 and the safety valve 9 so as not to close the opening of the output terminal 7 and the safety valve 9 provided on the upper surface of the rectangular battery cell 1. It has a shape. The horizontal portion 12a along the lower surface of the prismatic battery cell 1 has the same width as the vertical frame 12A and covers the entire lower surface of the prismatic battery cell 1 while being sandwiched between the prismatic battery cells 1. The separator 2 is sandwiched between the rectangular battery cells 1 and can be insulated by covering both side surfaces and the lower surface of the stacked rectangular battery cells 1 with the separator 2.

さらに、図の分割セパレータ11は、縦枠12Aの中間に位置して、両端を縦枠12Aに連結してする支持ロッド15を一体的に成形して設けている。図の分割セパレータ11は、縦枠12Aの上下の中央に1本の支持ロッド15を設けている。支持ロッド15は、絶縁シート10を挟着して、絶縁シート10を角形電池セル1の対向面1Aの中間に配置する。さらに、一対の支持ロッド15が絶縁シート10を挟着する状態で、その厚さ、すなわち2本の支持ロッド15と絶縁シート10の厚さが加算される厚さは、隣接して配設される角形電池セル1の対向面1Aの間隔としている。いいかえると、絶縁シート10を挟着する一対の支持ロッド15を、隣接する角形電池セル1の対向面1Aで挟着するようにしている。この構造のセパレータ2は、支持ロッド15で絶縁シート10を対向面1Aに中央に正確に配置して、絶縁シート10の両面に設けられる送風隙間3の隙間を正確に同じにできる。また、一対の支持ロッド15を対向面1Aに挟着する構造によって、角形電池セル1の対向面1Aが膨れるように変形するのを防止できる。図の分割セパレータ11は、中央に1本の支持ロッド15を設けている。この分割セパレータ11は、支持ロッド15を設けながら、有効放熱面積の減少を最も少なくできる。ただし、分割セパレータは、図示しないが、中間に複数の支持ロッドを設けることもできる。複数の支持ロッドを設ける分割セパレータは、各々の支持ロッドを細くして、有効放熱面積の減少を少なくできる。また、複数の支持ロッドを隣接する角形電池セルの対向面に挟着して、角形電池セルの対向面の膨れをより確実に阻止できる。   Further, the divided separator 11 shown in the figure is located in the middle of the vertical frame 12A, and is integrally provided with a support rod 15 having both ends connected to the vertical frame 12A. The illustrated separator 11 is provided with a single support rod 15 at the center of the vertical frame 12A. The support rod 15 sandwiches the insulating sheet 10 and arranges the insulating sheet 10 in the middle of the facing surface 1 </ b> A of the rectangular battery cell 1. Further, in a state where the pair of support rods 15 sandwich the insulating sheet 10, the thickness thereof, that is, the thickness in which the thicknesses of the two support rods 15 and the insulating sheet 10 are added is arranged adjacent to each other. It is set as the space | interval of 1 A of opposing surfaces of the square battery cell 1 which is. In other words, the pair of support rods 15 that sandwich the insulating sheet 10 are sandwiched between the opposing surfaces 1A of the adjacent rectangular battery cells 1. In the separator 2 having this structure, the insulating sheet 10 is accurately arranged in the center on the facing surface 1A by the support rod 15, and the gaps of the air blowing gaps 3 provided on both surfaces of the insulating sheet 10 can be made exactly the same. Moreover, it can prevent that the opposing surface 1A of the square battery cell 1 expand | swells by the structure which clamps a pair of support rod 15 to 1A of opposing surfaces. The illustrated separator 11 is provided with one support rod 15 in the center. The split separator 11 can minimize the decrease in the effective heat radiation area while providing the support rod 15. However, although the separator is not shown, a plurality of support rods may be provided in the middle. In the divided separator provided with a plurality of support rods, each support rod can be made thinner to reduce the reduction of the effective heat radiation area. In addition, the plurality of support rods can be sandwiched between the opposing surfaces of the adjacent rectangular battery cells to more reliably prevent swelling of the opposing surfaces of the rectangular battery cells.

支持ロッド15は、送風隙間3の送風方向に伸びるように設けられる。図の組電池は、組電池の両側に送風ダクト6を設けて、送風隙間3に水平方向に強制送風するので、支持ロッド15を水平姿勢に配設している。図示しないが、組電池は、角形電池セルの間で冷却空気を上下方向に強制送風することもできる。この組電池は、上下の横枠に送風開口を設けて、上下に送風ダクトを配置する。また、支持ロッドも上下に伸びるように設けて、支持ロッドが冷却空気の送風を阻害しないようにする。   The support rod 15 is provided so as to extend in the blowing direction of the blowing gap 3. In the illustrated assembled battery, the air duct 6 is provided on both sides of the assembled battery, and the air is forcedly blown in the horizontal direction through the air gap 3, so that the support rod 15 is disposed in a horizontal posture. Although not shown, the assembled battery can also forcibly blow cooling air in the vertical direction between the rectangular battery cells. In this assembled battery, air blowing openings are provided in upper and lower horizontal frames, and air blowing ducts are arranged on the upper and lower sides. In addition, the support rod is also provided so as to extend vertically so that the support rod does not hinder the cooling air.

さらに、図のセパレータ2は、絶縁シート10の挟着面を嵌合構造としている。図のセパレータ2は、一対の分割セパレータ11の挟着面に設けた嵌合構造を、一方の分割セパレータ11に設けた嵌着凸部16と、この嵌着凸部16を挿入する嵌着凹部17とで構成する。図の分割セパレータ11は、上下の横枠12Bに、両側部と中間部とに嵌着凸部16と、嵌着凹部17を設けている。嵌着凸部16を嵌着凹部17に挿入して、一対の分割セパレータ11は定位置に連結される。いいかえると、嵌着凸部16を嵌着凹部17に挿入して、定位置に連結できる位置に、嵌着凸部16と嵌着凹部17を設けている。   Furthermore, the separator 2 in the drawing has a fitting structure on the sandwiching surface of the insulating sheet 10. The separator 2 in the figure has a fitting structure provided on a sandwiching surface of a pair of divided separators 11, a fitting convex part 16 provided on one divided separator 11, and a fitting concave part into which the fitting convex part 16 is inserted. 17. The divided separator 11 shown in the figure is provided with fitting convex portions 16 and fitting concave portions 17 on both side portions and an intermediate portion on the upper and lower horizontal frames 12B. By inserting the fitting convex portion 16 into the fitting concave portion 17, the pair of divided separators 11 are connected to a fixed position. In other words, the fitting convex portion 16 and the fitting concave portion 17 are provided at a position where the fitting convex portion 16 is inserted into the fitting concave portion 17 and can be connected to a fixed position.

さらに、図のセパレータ2は、絶縁シート10にも、嵌着凸部16を挿入する貫通孔10Aを設けている。このセパレータは、嵌着凸部16を絶縁シート10の貫通孔10Aに貫通して嵌着凹部17に挿入することで、一対の分割セパレータ11と絶縁シート10とを定位置に連結できる。互いに定位置に連結された一対の分割セパレータ11は、互いに結合することなく、角形電池セル1の間に挟着され、あるいは超音波溶着や接着などの方法で結合して、角形電池セル1の間に挟着される。   Further, in the illustrated separator 2, the insulating sheet 10 is also provided with a through hole 10 </ b> A for inserting the fitting convex portion 16. This separator can connect the pair of divided separators 11 and the insulating sheet 10 at a fixed position by inserting the fitting convex portion 16 through the through hole 10A of the insulating sheet 10 and inserting the fitting convex portion 16 into the fitting concave portion 17. The pair of divided separators 11 connected to each other in a fixed position are sandwiched between the rectangular battery cells 1 without being bonded to each other, or bonded by a method such as ultrasonic welding or adhesion, so that the rectangular battery cell 1 It is sandwiched between.

さらに、図に示すセパレータ2は、角形電池セル1の温度を検出する温度センサ(図示せず)を挿入する挿入口18を開口している。温度センサは、組電池を構成する角形電池セル1の温度を検出する。温度センサは、サーミスタ等の温度で電気抵抗が変化する素子である。図のセパレータは、上面から斜めに傾斜して挿入口18を開口している。セパレータ2は、角形電池セル1をより広い面積で冷却できるように、できる限り上部まで送風隙間3を設けている。したがって、セパレータ2の上縁部にあって、互いに接触して積層される横枠12Bの垂直部12bは、上下幅が狭くなる。この垂直部12bに傾斜して挿入口18を設けて挿入口18を長くできる。長い挿入口18に挿入される温度センサは、角形電池セル1の温度を正確に検出しながら、挿入口18にしっかりと確実に固定される。さらに、サーミスタなどの温度センサは、図示しないが、金属筒に入れて挿入口18に挿入される。この温度センサは、熱伝導に優れた金属筒を介して角形電池セル1の温度を速やかに検出する。挿入口18に挿入された金属筒は、絶縁材のセパレータ2で角形電池セル1から絶縁される。角形電池セル1の上部に熱結合して配設される温度センサは、冷却気体の影響を受けず、角形電池セル1の温度を正確に検出する。   Further, the separator 2 shown in the figure has an insertion port 18 into which a temperature sensor (not shown) for detecting the temperature of the rectangular battery cell 1 is inserted. A temperature sensor detects the temperature of the square battery cell 1 which comprises an assembled battery. A temperature sensor is an element whose electrical resistance changes with temperature, such as a thermistor. The separator shown in the figure is inclined obliquely from the upper surface and opens the insertion port 18. The separator 2 is provided with the air gap 3 as far as possible so that the prismatic battery cell 1 can be cooled in a wider area. Accordingly, the vertical width 12b of the horizontal frame 12B that is stacked in contact with each other at the upper edge of the separator 2 has a narrow vertical width. The insertion port 18 can be lengthened by providing the insertion port 18 with an inclination in the vertical portion 12b. The temperature sensor inserted into the long insertion port 18 is firmly and securely fixed to the insertion port 18 while accurately detecting the temperature of the prismatic battery cell 1. Furthermore, although not shown, a temperature sensor such as a thermistor is inserted into the insertion port 18 in a metal tube. This temperature sensor quickly detects the temperature of the prismatic battery cell 1 through a metal cylinder excellent in heat conduction. The metal tube inserted into the insertion port 18 is insulated from the rectangular battery cell 1 by the separator 2 made of an insulating material. The temperature sensor that is thermally coupled to the upper part of the prismatic battery cell 1 is not affected by the cooling gas and accurately detects the temperature of the prismatic battery cell 1.

図1と図3の組電池は、左右の両側に一対の送風ダクト6を設けている。送風ダクト6は、流入ダクト6Aと排出ダクト6Bからなる。流入ダクト6Aと排出ダクト6Bは、互いに反対側に設けられて、冷却気体を流入ダクト6Aから送風隙間3に、送風隙間3から排出ダクト6Bに送風して、角形電池セル1を冷却する。流入ダクト6Aと排出ダクト6Bには複数の送風隙間3が並列に連結される。したがって、流入ダクト6Aに送風される冷却気体は、複数の送風隙間3に分岐して送風され、送風ダクト6から排出ダクト6Bに送風される。図の組電池は、流入ダクト6Aと排出ダクト6Bを両側に設けているので、送風隙間3を水平方向に伸びるように設けている。冷却気体は、送風隙間3に水平方向に送風されて、角形電池セル1を冷却する。ただし、組電池は、送風隙間を上下方向に伸びるように設けて、一対の送風ダクトを組電池の上下の対向面に設けることもできる。   1 and 3 has a pair of air ducts 6 on both the left and right sides. The air duct 6 includes an inflow duct 6A and an exhaust duct 6B. The inflow duct 6 </ b> A and the exhaust duct 6 </ b> B are provided on opposite sides, and cool the rectangular battery cell 1 by sending cooling gas from the inflow duct 6 </ b> A to the blower gap 3 and from the blower gap 3 to the discharge duct 6 </ b> B. A plurality of air gaps 3 are connected in parallel to the inflow duct 6A and the exhaust duct 6B. Therefore, the cooling gas blown to the inflow duct 6 </ b> A branches into the plurality of blow gaps 3 and is blown, and blown from the blow duct 6 to the discharge duct 6 </ b> B. In the illustrated battery pack, the inflow duct 6A and the exhaust duct 6B are provided on both sides, so that the air gap 3 is provided so as to extend in the horizontal direction. The cooling gas is blown horizontally in the blowing gap 3 to cool the rectangular battery cell 1. However, an assembled battery can also provide a ventilation gap so that it may extend in the up-down direction, and can provide a pair of ventilation ducts on the upper and lower opposing surfaces of the assembled battery.

以上の組電池は、車両用の電源装置に組み込まれる。この組電池を備える電源装置は、図示しないが、角形電池セル1の温度を検出する複数の温度センサと、この温度センサで検出される角形電池セル1の温度で、送風ダクト6を介して各々の送風隙間3に分岐して冷却気体を送風する強制送風機と、温度センサで検出される角形電池セル1の温度で電池の電流を制御する制御回路とを備える。   The above assembled battery is incorporated in a power supply device for a vehicle. Although not shown, the power supply device including the assembled battery includes a plurality of temperature sensors for detecting the temperature of the prismatic battery cell 1 and the temperature of the prismatic battery cell 1 detected by the temperature sensor via the air duct 6. A forced air blower that branches into the air gap 3 and blows the cooling gas, and a control circuit that controls the battery current at the temperature of the rectangular battery cell 1 detected by the temperature sensor.

強制送風機は、送風ダクト6に連結される。電源装置は、たとえば、流入ダクト6Aに強制送風機を連結して、強制送風機から流入ダクト6Aに冷却気体を強制送風する。この電源装置は、強制送風機→流入ダクト6A→送風隙間3→排出ダクト6Bに冷却気体を送風して、角形電池セル1を冷却する。ただし、強制送風機は、排出ダクトに連結することもできる。この強制送風機は、排出ダクトから冷却気体を強制的に吸入して排気する。したがって、この電源装置は、冷却気体を、流入ダクト→送風隙間→排出ダクト→強制送風機に送風して、角形電池セルを冷却する。送風される冷却気体は空気であるが、空気に代わって窒素や炭酸ガスなどの不活性ガスを送風することもできる。冷却気体を不活性ガスとする電源装置は、冷却気体を循環して、角形電池セル1を冷却する。循環される不活性ガスは、流路の途中に配設している冷却用の熱交換器で冷却されて、流入ダクト→送風隙間3→排出ダクト→強制送風機に循環されて、角形電池セル1を冷却する。   The forced blower is connected to the blower duct 6. The power supply device, for example, connects a forced blower to the inflow duct 6A and forcibly blows cooling gas from the forced blower to the inflow duct 6A. This power supply device cools the prismatic battery cell 1 by sending cooling gas to the forced blower → the inflow duct 6 </ b> A → the ventilation gap 3 → the discharge duct 6 </ b> B. However, the forced blower can also be connected to the discharge duct. The forced blower forcibly sucks and exhausts the cooling gas from the discharge duct. Therefore, this power supply device cools the rectangular battery cell by blowing the cooling gas to the inflow duct → the ventilation gap → the discharge duct → the forced blower. The cooling gas to be blown is air, but an inert gas such as nitrogen or carbon dioxide can be blown instead of air. The power supply device using the cooling gas as an inert gas circulates the cooling gas to cool the rectangular battery cell 1. The inert gas to be circulated is cooled by a cooling heat exchanger disposed in the middle of the flow path, and is circulated through the inflow duct → the ventilation gap 3 → the exhaust duct → the forced blower, and the rectangular battery cell 1 Cool down.

強制送風機は、モータで回転されるファンを備え、モータの運転は制御回路に制御される。制御回路は、温度センサの信号で強制送風機のモータの運転を制御する。制御回路は、温度センサが検出する最高温度が設定温度よりも高くなると、強制送風機のモータを運転して、送風隙間に冷却気体を強制送風する。最高温度が設定温度よりも低くなると、モータの運転を停止する。さらに、制御回路は、温度センサの検出温度によって、モータに供給する電力をコントロールして、角形電池セルを所定の温度範囲に制御することもできる。たとえば、温度センサの検出温度が高くなるとモータに供給する電力を次第に大きくして、強制送風機が送風する風量を多くし、検出温度が低くなるとモータの供給電力を小さくして、設定された温度範囲に制御することもできる。   The forced blower includes a fan that is rotated by a motor, and the operation of the motor is controlled by a control circuit. The control circuit controls the operation of the motor of the forced air blower with a signal from the temperature sensor. When the maximum temperature detected by the temperature sensor becomes higher than the set temperature, the control circuit operates the motor of the forced blower to forcibly blow the cooling gas into the blower gap. When the maximum temperature is lower than the set temperature, the motor is stopped. Furthermore, the control circuit can control the electric power supplied to the motor according to the temperature detected by the temperature sensor to control the rectangular battery cell to a predetermined temperature range. For example, when the detected temperature of the temperature sensor increases, the power supplied to the motor is gradually increased, the amount of air blown by the forced blower is increased, and when the detected temperature is decreased, the supplied power of the motor is decreased, and the set temperature range It can also be controlled.

本発明の一実施例にかかる車両用の組電池の斜視図である。It is a perspective view of the assembled battery for vehicles concerning one Example of this invention. 図1に示す車両用の組電池の分解斜視図である。It is a disassembled perspective view of the assembled battery for vehicles shown in FIG. 図1に示す車両用の組電池の拡大水平断面図である。It is an expanded horizontal sectional view of the assembled battery for vehicles shown in FIG. 図1に示す車両用の組電池の拡大垂直断面図である。It is an expansion vertical sectional view of the assembled battery for vehicles shown in FIG. 角形電池セルとセパレータの積層状態を示す分解斜視図である。It is a disassembled perspective view which shows the lamination | stacking state of a square battery cell and a separator. セパレータの斜視図である。It is a perspective view of a separator. 図6に示すセパレータの分解斜視図である。It is a disassembled perspective view of the separator shown in FIG.

符号の説明Explanation of symbols

1…角形電池セル 1A…対向面
2…セパレータ
3…送風隙間
4…エンドプレート
5…連結固定具
6…送風ダクト 6A…流入ダクト
6B…排出ダクト
7…出力端子
8…連結ボルト
9…安全弁
10…絶縁シート 10A…貫通孔
11…分割セパレータ
12…枠部 12A…縦枠
12B…横枠
12a…水平部
12b…垂直部
13…開口部
14…送風開口
15…支持ロッド
16…嵌着凸部
17…嵌着凹部
18…挿入口
DESCRIPTION OF SYMBOLS 1 ... Square battery cell 1A ... Opposite surface 2 ... Separator 3 ... Air blowing gap 4 ... End plate 5 ... Connection fixture 6 ... Air blowing duct 6A ... Inflow duct
6B ... Exhaust duct 7 ... Output terminal 8 ... Connection bolt 9 ... Safety valve 10 ... Insulating sheet 10A ... Through hole 11 ... Division separator 12 ... Frame portion 12A ... Vertical frame
12B ... Horizontal frame
12a ... Horizontal part
12b ... Vertical part 13 ... Opening part 14 ... Blower opening 15 ... Support rod 16 ... Fitting convex part 17 ... Fitting concave part 18 ... Insertion port

Claims (4)

複数の角形電池セル(1)をセパレータ(2)を介して送風隙間(3)を設ける状態で積層してなる車両用の組電池であって、
前記セパレータ(2)が、隣接する角形電池セル(1)の対向面(1A)の間に配設してなる絶縁シート(10)と、この絶縁シート(10)の両側にあって、絶縁シート(10)を挟着してなる一対の分割セパレータ(11)とを備え、
前記分割セパレータ(11)は、角形電池セル(1)の外周に沿う枠部(12)を有し、この枠部(12)の内側を開口して、この開口部(13)において、絶縁シート(10)の両面と角形電池セル(1)の間に送風隙間(3)を設けており、
さらに、前記分割セパレータ(11)は、送風隙間(3)に気体を送風する送風開口(14)を枠部(12)に有し、この送風開口(14)から送風隙間(3)に強制送風して角形電池セル(1)を冷却し、又は加温するようにしてなる車両用の組電池。
A battery pack for a vehicle in which a plurality of prismatic battery cells (1) are stacked in a state of providing a ventilation gap (3) via a separator (2),
The separator (2) is disposed between the opposing surfaces (1A) of the adjacent rectangular battery cells (1), and the insulating sheet (10) is on both sides of the insulating sheet (10). A pair of split separators (11) sandwiched between (10),
The divided separator (11) has a frame portion (12) along the outer periphery of the rectangular battery cell (1), and an inner side of the frame portion (12) is opened, and an insulating sheet is formed in the opening portion (13). There is a ventilation gap (3) between both sides of (10) and the square battery cell (1),
Further, the divided separator (11) has a blower opening (14) for blowing gas to the blower gap (3) in the frame part (12), and forced blower from the blower opening (14) to the blower gap (3). Then, the assembled battery for a vehicle, wherein the prismatic battery cell (1) is cooled or heated.
一対の分割セパレータ(11)が、絶縁シート(10)の挟着面を嵌合構造としている請求項1に記載される車両用の組電池。   2. The assembled battery for a vehicle according to claim 1, wherein the pair of divided separators (11) has a fitting structure on a sandwiching surface of the insulating sheet (10). 一対の分割セパレータ(11)の挟着面に設けた嵌合構造が、一方の分割セパレータ(11)に設けた嵌着凸部(16)と、この嵌着凸部(16)を挿入する嵌着凹部(17)とからなり、前記絶縁シート(10)が嵌着凸部(16)を挿入する貫通孔(10A)を設けており、嵌着凸部(16)が絶縁シート(10)の貫通孔(10A)に貫通されて嵌着凹部(17)に挿入されて、一対の分割セパレータ(11)と絶縁シート(10)とを定位置に連結するようにしてなる請求項2に記載される車両用の組電池。   The fitting structure provided on the sandwiching surface of the pair of split separators (11) includes a fitting convex part (16) provided on one split separator (11) and a fitting for inserting the fitting convex part (16). The insulating sheet (10) is provided with a through hole (10A) for inserting the fitting convex part (16), and the fitting convex part (16) is formed on the insulating sheet (10). It is penetrated by a through-hole (10A), is inserted in a fitting recessed part (17), and connects a pair of division | segmentation separator (11) and an insulating sheet (10) to a fixed position, It is described in Claim 2 Assembled battery for vehicles. 前記分割セパレータ(11)の枠部(12)が、両側の縦枠(12A)と上下の横枠(12B)からなり、両側の縦枠(12A)に送風開口(14)を設けて、縦枠(12A)の中間に両端を縦枠(12A)に連結してなる支持ロッド(15)を設けており、この支持ロッド(15)で絶縁シート(10)を挟着すると共に、絶縁シート(10)を挟着する一対の支持ロッド(15)を隣接する角形電池セル(1)の対向面(1A)に挟着してなる請求項1に記載される車両用の組電池。   A frame portion (12) of the divided separator (11) includes a vertical frame (12A) on both sides and an upper and lower horizontal frame (12B), and a vertical opening (14) is provided in the vertical frame (12A) on both sides to A support rod (15) having both ends connected to the vertical frame (12A) is provided in the middle of the frame (12A) .The insulation sheet (10) is sandwiched between the support rods (15) and the insulation sheet ( The assembled battery for vehicles according to claim 1, wherein a pair of support rods (15) sandwiching 10) is sandwiched between opposing faces (1A) of adjacent rectangular battery cells (1).
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