JP5478791B2 - Assembled battery - Google Patents
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- JP5478791B2 JP5478791B2 JP2009169143A JP2009169143A JP5478791B2 JP 5478791 B2 JP5478791 B2 JP 5478791B2 JP 2009169143 A JP2009169143 A JP 2009169143A JP 2009169143 A JP2009169143 A JP 2009169143A JP 5478791 B2 JP5478791 B2 JP 5478791B2
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- 238000009434 installation Methods 0.000 claims description 30
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- 229920002379 silicone rubber Polymers 0.000 claims description 15
- 239000004945 silicone rubber Substances 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 22
- 229910052799 carbon Inorganic materials 0.000 description 22
- 238000009792 diffusion process Methods 0.000 description 11
- 239000013078 crystal Substances 0.000 description 9
- 229920001971 elastomer Polymers 0.000 description 9
- 230000017525 heat dissipation Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- -1 etc.) Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Description
本発明は、各単電池の熱を外部に効率的に放熱可能な組電池に関する。 The present invention relates to an assembled battery that can efficiently dissipate the heat of each unit cell to the outside.
従来、多様な負荷電圧や負荷容量に対し共通化された電池で対応する為に、電池を直列接続や並列接続、又はそれらを組み合わせた接続をし、組電池を構成することが多い。特に、近年は、急速充填や高率放電にて使用される用途が増大し、電池温度が高温になり易く、寿命を縮める原因となっている。特に、扁平形電池の長側面同士を接するように組電池を構成した場合、放熱経路がタブリード以外ほとんど無く、中央部に位置する電池の温度が非常に高くなり、他に位置する電池よりも早期に寿命意至り、結果的に組電池としての寿命が短くなってしまう。 Conventionally, in order to cope with various load voltages and load capacities by using a common battery, the battery is often connected in series, parallel, or a combination thereof to form an assembled battery. In particular, in recent years, applications used for rapid filling and high-rate discharge have increased, and the battery temperature tends to be high, leading to a shortened life. In particular, when the assembled battery is configured so that the long side surfaces of the flat battery are in contact with each other, there is almost no heat dissipation path other than the tab lead, and the temperature of the battery located in the central part becomes very high, which is earlier than the batteries located elsewhere. As a result, the lifetime of the assembled battery is shortened.
このような課題を解決するため、特許文献１や特許文献２が提案されている。特許文献１では、単電池間に隙間を開け、そこに冷却風を流して冷却する空冷方式が開示されている。特許文献２には、単電池間に冷却液を循環させる水冷方式が開示されている。
In order to solve such problems,
しかしながら、上記方式では、単電池間に冷却風や冷却液を循環させるための隙間が必要になり、その分、組電池の大きさが大きくなってしまう。また、これらの方式の組電池を、自動車や航空機などの常に大きな衝撃が加わる移動体に使用した場合、単電池間に隙間を設けているために、耐振設計が複雑になり、十分な耐振構造を得ることが難しく、コスト高も招く。 However, the above method requires a gap for circulating the cooling air or the coolant between the single cells, and the size of the assembled battery increases accordingly. In addition, when these types of assembled batteries are used for mobile objects that are subject to constant impact, such as automobiles and airplanes, there is a gap between the cells, which complicates the vibration resistance design and provides sufficient vibration resistance structure. Is difficult and costly.
なお、電池に限らず、極一般的な放熱手段として、熱源の熱をアルミニウムや銅などでできたヒートシンクに伝熱させ、そのヒートシンクから空気中に放熱させる手段がよく知られている。しかし、この方法を電池に適用すると、どうしても質量が大きくなり、コストも高くなる。 In addition, not only the battery but also a very general heat dissipating means is well known as a means for transferring heat from a heat source to a heat sink made of aluminum, copper or the like and dissipating the heat from the heat sink into the air. However, when this method is applied to a battery, the mass inevitably increases and the cost also increases.
本発明はこうした事情を考慮してなされたもので、組電池の質量増大やコスト高を招くことなく、温度上昇を抑制しえる寿命性能のよい組電池を提供することを目的とする。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide an assembled battery with good life performance capable of suppressing a temperature rise without increasing the mass of the assembled battery and increasing the cost.
本発明に係る組電池は、電池収納ケース内に複数の角形単電池を互いに隣接する面が前記電池収納ケース内の設置面に対して交差するように設置、収納した組電池であって、
前記複数の角形単電池と前記電池収納ケース内の設置面との間に配置した熱伝導性シリコーンゴムシートと、
前記複数の角形単電池の互いに隣接する面の間、および前記複数の角形単電池の隣接方向の端部に位置し、前記電池収納ケースの内面と対向する角形単電池の面にそれぞれ配置した複数の矩形状アルミニウム板と
を具備し、
前記各矩形状アルミニウム板は、４つの辺が前記角形電池の互いに隣接する面の４つ辺から０．０５〜０．１ｍｍ突出し、前記熱伝導性シリコーンゴムシート側に位置する前記各矩形状アルミニウム板の突出部を前記熱伝導性シリコーンゴムシートに食い込ませ、各矩形状アルミニウム板の突出部を前記熱伝導性シリコーンゴムシートに密着させ、同時に前記複数の角形単電池を前記熱伝導性シリコーンゴムシートに密着させることを特徴とする。
The assembled battery according to the present invention is an assembled battery in which a plurality of rectangular cells are installed and stored in a battery storage case so that surfaces adjacent to each other intersect an installation surface in the battery storage case,
A thermally conductive silicone rubber sheet disposed between the plurality of rectangular cells and an installation surface in the battery storage case;
A plurality of prismatic cells that are positioned between adjacent surfaces of the plurality of prismatic cells and at an end in the adjacent direction of the plurality of prismatic cells and that are respectively disposed on the surfaces of the prismatic cells facing the inner surface of the battery storage case. With rectangular aluminum plate
Comprising
Each rectangular aluminum plate has four sides protruding 0.05 to 0.1 mm from the four sides of the adjacent surfaces of the rectangular battery, and each rectangular aluminum plate located on the thermally conductive silicone rubber sheet side. The protruding portion of the plate is bitten into the thermally conductive silicone rubber sheet, the protruding portion of each rectangular aluminum plate is brought into close contact with the thermally conductive silicone rubber sheet, and at the same time, the plurality of rectangular unit cells are connected to the thermally conductive silicone rubber. It is characterized by being in close contact with the sheet .
本発明によれば、組電池の質量増大やコスト高を招くことなく、温度上昇を抑制しえる寿命性能のよい組電池が得られる。 ADVANTAGE OF THE INVENTION According to this invention, the assembled battery with the sufficient lifetime performance which can suppress a temperature rise is obtained, without causing the mass increase and cost increase of an assembled battery.
本発明に係る組電池について以下に詳細に説明する。
本発明において、単電池と組電池設置部間に配置される熱伝導性部材としては、例えば熱伝導性シート、熱伝導性接着剤、熱伝導性ペースト、熱伝導性ゲルが挙げられる。ここで、前記熱伝導性シートとは、熱伝導性に優れる物質を樹脂やゴムに混合してシート状に固化したものである。前記熱伝導性接着剤とは、熱伝導性に優れる物質を接着性物質に混合したものである。前記熱伝導性ペーストとは、熱伝導性に優れる物質を粘性のある物質で混合したものである。前記熱伝導性ゲルとは、熱伝導性に優れる物質にゲルを配合したもの（シリコーンゲル等）である。
The assembled battery according to the present invention will be described in detail below.
In this invention, as a heat conductive member arrange | positioned between a cell and an assembled battery installation part, a heat conductive sheet, a heat conductive adhesive, a heat conductive paste, and a heat conductive gel are mentioned, for example. Here, the heat conductive sheet is a sheet obtained by mixing a material having excellent heat conductivity with a resin or rubber and solidifying the sheet. The heat conductive adhesive is obtained by mixing a material having excellent heat conductivity with an adhesive material. The heat conductive paste is obtained by mixing a material having excellent heat conductivity with a viscous material. The said heat conductive gel is what mix | blended gel with the substance excellent in heat conductivity (silicone gel etc.).
こうした熱伝導性部材を単電池と組電池設置部間に配置することにより、単電池の熱を組電池設置部に伝熱させ、組電池設置部から外部に放熱することができる。
上記熱伝導性シートを、幅方向（図１のｘ方向）の熱伝導率が低く、厚み方向（図１のｙ方向）の熱伝導率が高いシートにすることにより、更に効率よく組電池の熱を組電池設置部に伝熱させ、組電池設置部から外部に放熱することができる。前記熱伝導性シートとしては、例えばカーボン結晶を幅方向に積層させたカーボンシートが挙げられる。
By disposing such a heat conductive member between the unit cell and the assembled battery installation part, the heat of the unit cell can be transferred to the assembled battery installation part and radiated from the assembled battery installation part to the outside.
By making the thermal conductive sheet into a sheet having a low thermal conductivity in the width direction (x direction in FIG. 1) and a high thermal conductivity in the thickness direction (y direction in FIG. 1), the assembled battery is more efficiently produced. Heat can be transferred to the assembled battery installation section and radiated from the assembled battery installation section to the outside. Examples of the thermally conductive sheet include a carbon sheet in which carbon crystals are laminated in the width direction.
カーボンシートは、カーボン結晶の配列方向により熱伝導率が異なり、厚み方向にカーボン結晶を積層させることにより、幅方向の熱伝導率は２００〜５００Ｗｈ／ｃｍ２と非常に高く、厚み方向の熱伝導率は１０Ｗｈ／ｃｍ２以下と幅方向の熱伝導率に比べて低くできる。このようなカーボンシートを使用することで、組電池の熱を非常に効率的に組電池設置部に伝熱させ、組電池設置部から外部に放熱することができる。 The carbon sheet has a different thermal conductivity depending on the arrangement direction of the carbon crystals, and by laminating the carbon crystals in the thickness direction, the thermal conductivity in the width direction is as high as 200 to 500 Wh / cm 2. The rate can be as low as 10 Wh / cm 2 or less compared to the thermal conductivity in the width direction. By using such a carbon sheet, the heat of the assembled battery can be transferred to the assembled battery installation portion very efficiently and can be radiated to the outside from the assembled battery installation portion.
本発明において、前記熱伝導性部材をゴム弾性体の熱伝導性部材にすることが好ましい。前記ゴム弾性体の熱伝導性部材を組電池等に用いる場合、設置，配置等の観点からシート状（ゴム弾性熱伝導シート）とすることが好ましい。ゴム弾性熱伝導シートを用いることにより、耐振性が向上する。ここで、ゴム弾性体の熱伝導性部材としては、例えば硬化後ゴム弾性体になる熱伝導性接着剤や、熱伝導性シリコーンゴムシートが挙げられる。本発明において、ゴム弾性熱伝導性シートとカーボン結晶を幅方向に積層させたカーボンシートとを積層させることが好ましい。これにより、放熱性と耐振性を兼ね合わせることができる。 In the present invention, the heat conductive member is preferably a rubber elastic heat conductive member. When the heat conductive member of the rubber elastic body is used for an assembled battery or the like, it is preferable to form a sheet (rubber elastic heat conductive sheet) from the viewpoint of installation, arrangement, and the like. By using the rubber elastic heat conductive sheet, vibration resistance is improved. Here, examples of the heat conductive member of the rubber elastic body include a heat conductive adhesive that becomes a rubber elastic body after curing, and a heat conductive silicone rubber sheet. In this invention, it is preferable to laminate | stack the rubber elastic heat conductive sheet and the carbon sheet which laminated | stacked the carbon crystal on the width direction. Thereby, heat dissipation and vibration resistance can be combined.
本発明において、単電池間に熱伝導率の高い板を配置し、この板が前記熱伝導性部材と密着するように配置することが好ましい。熱伝導率の高い板としては、アルミニウムや銅などの金属板が挙げられる。こうした金属板の配置により、各単電池の熱を、金属板を介して熱伝導性部材に移動させることができる。ここで、前記金属板は熱伝導率が全方向に同じであるため、隣接する単電池を加熱してしまう。しかし、厚み方向の熱伝導率が低く、幅方向の熱伝導率が厚み方向の熱伝導率より高いシート（熱拡散シート）を配置することにより、隣接する単電池へは熱をあまり伝えず、効率的に熱を移動することができる。 In this invention, it is preferable to arrange | position a board | substrate with high heat conductivity between single cells, and to arrange | position so that this board | plate may contact | adhere with the said heat conductive member. Examples of the plate having high thermal conductivity include metal plates such as aluminum and copper. With the arrangement of the metal plate, the heat of each unit cell can be transferred to the heat conductive member via the metal plate. Here, since the metal plate has the same thermal conductivity in all directions, the adjacent unit cells are heated. However, by disposing a sheet (heat diffusion sheet) having a low thermal conductivity in the thickness direction and a higher thermal conductivity in the width direction than the thermal conductivity in the thickness direction, it does not transmit much heat to adjacent unit cells, Heat can be transferred efficiently.
また、前記熱伝導性の高い板は夫々の単電池より若干突出させることにより熱伝導性の高い板と外部（空気）との接触面積を増加させ、放熱性を向上させることが可能である。特に、突出した熱伝導性の高い板（熱拡散シート）を熱伝導性部材に密着（突出している分、熱伝導部材に食込む形となる。）させることにより、熱伝導性の高い板と熱伝導性部材との密着性が向上し放熱性が促進される。なお、熱伝導性の高い板はその大きさは特に限定するものではないが、突出部が０．１ｍｍ以下とすることが好ましい。ここで、突出部が０．１ｍｍ超過すると、熱伝導シートを破損する恐れがあり、組電池の熱を放熱する力が低下する。 Further, the plate having high thermal conductivity slightly protrudes from each unit cell, whereby the contact area between the plate having high thermal conductivity and the outside (air) can be increased, and heat dissipation can be improved. In particular, by sticking a protruding plate (thermal diffusion sheet) with high thermal conductivity to the thermal conductive member (because it protrudes, the thermal conductive member bites into the thermal conductive member) Adhesiveness with a heat conductive member improves and heat dissipation is accelerated | stimulated. In addition, although the magnitude | size does not specifically limit the board with high heat conductivity, It is preferable that a protrusion part shall be 0.1 mm or less. Here, when a protrusion part exceeds 0.1 mm, there exists a possibility that a heat conductive sheet may be damaged and the force which thermally radiates the heat | fever of an assembled battery falls.
前記厚み方向の熱伝導率が低く、幅方向の熱伝導率が厚み方向の熱伝導率より高い熱拡散シートとしては、例えば厚み方向にカーボン結晶を積層させたカーボンシートやヒートプレートがあるが、軽量化を考えた場合、安価で軽量なカーボンシートが適している。 As the thermal diffusion sheet having a low thermal conductivity in the thickness direction and a thermal conductivity in the width direction higher than the thermal conductivity in the thickness direction, for example, there are carbon sheets and heat plates in which carbon crystals are laminated in the thickness direction, When considering weight reduction, an inexpensive and lightweight carbon sheet is suitable.
前記カーボンシートは、カーボン結晶の配列方向により熱伝導率が異なり、カーボン結晶を厚み方向に積層させることにより、幅方向の熱伝導率は２００〜５００Ｗｈ／ｃｍ２と非常に高く、厚み方向の熱伝導率は１０Ｗｈ／ｃｍ２以下と幅方向の熱伝導率に比べて低くできる。このようなカーボンシートを使用することで、隣接する単電池へは熱をあまり伝えず、効率的に熱を移動することができる。 The carbon sheet has a different thermal conductivity depending on the arrangement direction of the carbon crystals, and by laminating the carbon crystals in the thickness direction, the thermal conductivity in the width direction is as high as 200 to 500 Wh / cm 2. The conductivity can be reduced to 10 Wh / cm 2 or less compared to the thermal conductivity in the width direction. By using such a carbon sheet, heat can be efficiently transferred without transferring much heat to adjacent single cells.
次に、本発明に係る組電池について図面を参照して説明する。
（第１の実施形態）
図１は、本発明の第１の実施形態に係る組電池の概略的な斜視図を示す。図中の符番１は互いに隣接して設置（立設）された単電池である。各単電池１の上部には、柱状（円柱状）の正極端子２，及び柱状（円柱状）の負極端子３が夫々取付けられている。各単電池１の正極端子２と負極端子３とは、夫々隣接する異極性の端子同士を接続板４により電気的に直列に接続されている。各単電池１の外側に露出する主面及び側面に、各単電池１を固定するための結束具６が各単電池１に接して巻かれており、各単電池１を結束具６によって固定することで組電池８が構成されている。前記組電池８は、金属製（アルミニウム、ステンレス、スチール、鉄−ニッケルメッキ、マグネシウム等）の組電池設置部９に設置され、前記単電池１と組電池設置部９間には熱伝導性部材７が設置されている。
Next, the assembled battery according to the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic perspective view of an assembled battery according to the first embodiment of the present invention.
なお、前記組電池８を図示しない電池収納ケースに収納し、該電池収納ケースは内部に積層された単電池１に対して高い気密性を有し、熱伝導性の高い材料を用いることが好ましい。前記電池収納ケースの材料としては、金属製（アルミニウム、ステンレス、スチール、鉄−ニッケルメッキ、マグネシウム等）、合成樹脂製（ポリエチレン、ポリプロピレン等のポリオレフィン系樹脂、ポリアミド系樹脂等の高融点樹脂）、熱伝導プラスチック等を用いることができる。
The assembled battery 8 is stored in a battery storage case (not shown), and the battery storage case is preferably made of a material having high airtightness and high heat conductivity with respect to the
（第２の実施形態）
図２及び図３は本発明の第２の実施形態に係る組電池であり、図２は概略的な斜視図、図３は図２の展開図である。なお、図１と同部材は同符番を付して説明を省略する。
図２，３中の符番１１は、単電池１間に配置された熱拡散シートである。この熱拡散シート１１は、各単電池１と組電池設置部９間に配置された熱伝導性部材７と当接するように設置されている。熱拡散シート１１は単電池より若干突出する大きさとし、熱伝導性部材７に熱拡散シート１１が密着する（食込む）様に設置することが好ましい。
(Second Embodiment)
2 and 3 show an assembled battery according to the second embodiment of the present invention, FIG. 2 is a schematic perspective view, and FIG. 3 is a developed view of FIG. Note that the same members as those in FIG.
次に、本発明の具体的な実施例について説明する。
最初に、長さ１４０ｍｍ，幅８０ｍｍ，厚み１０ｍｍの定格容量１０Ａｈのリチウムイオン蓄電池（単電池）を公知の方法にて作製し、前記リチウムイオン蓄電池（単電池）を隣接する異極性の端子同士を接続板を用いて８個直列に接続して、２４Ｖ−１０Ａｈの組電池を作製した。
Next, specific examples of the present invention will be described.
First, a lithium ion storage battery (unit cell) having a rated capacity of 10 Ah having a length of 140 mm, a width of 80 mm, and a thickness of 10 mm is manufactured by a known method, and adjacent terminals of different polarities are connected to the lithium ion storage battery (unit cell). Eight batteries were connected in series using a connection plate to produce a 24V-10Ah assembled battery.
（実施例１）
上記のように作製した組電池を、図示しない電池収納ケースに前記組電池と前記収納ケース底面である組電池設置部間に熱伝導性部材としてカーボンシートを配して収納、設置した。この組電池を電池Ａとした。
Example 1
The assembled battery produced as described above was stored and installed in a battery storage case (not shown) by placing a carbon sheet as a heat conductive member between the assembled battery and the assembled battery installation part at the bottom of the storage case. This assembled battery was designated as battery A.
（実施例２）
上記のように作製した組電池を、図示しない電池収納ケースに前記単電池と前記収納ケース底面である組電池設置部間に熱伝導性部材として熱伝導性シリコーンゴムートを配して収納、設置した。この組電池を電池Ｂとした。
(Example 2)
The assembled battery produced as described above is stored and installed in a battery storage case (not shown) by placing a heat conductive silicone rubber as a heat conductive member between the unit cell and the assembled battery installation part at the bottom of the storage case. did. This assembled battery was designated as battery B.
（実施例３）
上記のように作製した組電池を、図示しない電池収納ケースに前記単電池と前記収納ケース底面である組電池設置部間に熱伝導性部材として熱伝導性接着剤を配して収納、設置した。この組電池を電池Ｃとした。
(Example 3)
The assembled battery produced as described above was stored and installed in a battery storage case (not shown) with a heat conductive adhesive disposed as a heat conductive member between the unit cell and the assembled battery installation part at the bottom of the storage case. . This assembled battery was designated as a battery C.
（実施例４）
上記のように作製した組電池を、図示しない電池収納ケースに前記単電池と前記収納ケース底面である組電池設置部間に熱伝導性部材として熱伝導性ペーストを配して収納、設置した。この組電池を電池Ｄとした。
Example 4
The assembled battery produced as described above was stored and installed in a battery storage case (not shown) by placing a heat conductive paste as a heat conductive member between the unit cell and the assembled battery installation part at the bottom of the storage case. This assembled battery was designated as Battery D.
（実施例５）
まず、組電池設置面と交差する各単電池の隣接する当接面間及び単電池と電池収納ケース間に、アルミニウム板を付けて組電池を作製した。次に、その組電池を電池収納ケースに前記単電池と電池収納ケース底面である組電池設置部間に熱伝導性部材として熱伝導性シリコーンゴムシートを配して収納、設置した。この電池を電池Ｅとした。
(Example 5)
First, an assembled battery was manufactured by attaching an aluminum plate between adjacent contact surfaces of each unit cell intersecting the assembled battery installation surface and between the unit cell and the battery storage case. Next, the assembled battery was stored and installed in a battery storage case by disposing a heat conductive silicone rubber sheet as a heat conductive member between the unit cell and the assembled battery installation part at the bottom of the battery storage case. This battery was designated as battery E.
（実施例６）
まず、組電池設置面と交差する各単電池の隣接する当接面間及び単電池と電池収納ケース間に、厚み方向にカーボン結晶を積層させた熱拡散シート（カーボンシート）を付けて組電池を作製した。次に、その組電池を電池収納ケースに前記単電池と前記電池収納ケース底面である組電池設置部間に熱伝導性部材として熱伝導性シリコーンゴムシートを配して収納、設置した。この電池を電池Ｆとした。
(Example 6)
First, the assembled battery is provided with a heat diffusion sheet (carbon sheet) in which carbon crystals are laminated in the thickness direction between adjacent contact surfaces of each unit cell intersecting the assembled battery installation surface and between the unit cell and the battery storage case. Was made. Next, the assembled battery was stored and installed in a battery storage case by disposing a heat conductive silicone rubber sheet as a heat conductive member between the unit cell and the assembled battery installation part at the bottom of the battery storage case. This battery was designated as battery F.
（実施例７）
まず、組電池設置面と交差する各単電池の隣接する当接面間及び単電池と電池収納ケース間に、アルミニウム板を積層する各単電池の隣接する当接表面から四周の外方へ０．０５ｍｍずつ突出するように設けて組電池を作製した。次に、その組電池を電池収納ケースに前記単電池と電池収納ケース底面である組電池設置部間に熱伝導性部材として熱伝導性シリコーンゴムシートを配し、前記アルミ板が熱伝導性部材と密着するように（アルミ板が熱伝導性部材に食込むように）収納、設置した。この電池を電池Ｇとした。
(Example 7)
First, between the adjacent contact surfaces of each unit cell intersecting with the assembled battery installation surface and between the unit cell and the battery storage case, the adjacent contact surface of each unit cell on which the aluminum plate is laminated is moved to the outside of the four circumferences. An assembled battery was prepared by projecting by 0.05 mm. Next, a thermally conductive silicone rubber sheet is disposed as a thermally conductive member between the unit cell and the assembled battery installation part at the bottom of the battery storage case in the battery storage case, and the aluminum plate is a heat conductive member. It was stored and installed so that it was in close contact with the aluminum plate (so that the aluminum plate would bite into the heat conductive member). This battery was designated as battery G.
（実施例８）
まず、組電池設置面と交差する各単電池の隣接する当接面間及び単電池と電池収納ケース間に、厚み方向にカーボン結晶を積層させた熱拡散シート（カーボンシート）を付けて組電池を作製した。次に、その組電池を電池収納ケースに前記単電池と電池収納ケース底面である組電池設置部間に熱伝導性部材として幅方向にカーボン結晶を積層させたカーボンシートの両面に熱伝導性シリコーンゴムシートを配して収納、設置した。この電池を電池Ｈとした。
(Example 8)
First, the assembled battery is provided with a heat diffusion sheet (carbon sheet) in which carbon crystals are laminated in the thickness direction between adjacent contact surfaces of each unit cell intersecting the assembled battery installation surface and between the unit cell and the battery storage case. Was made. Next, the thermally conductive silicone is formed on both surfaces of the carbon sheet in which the assembled battery is laminated in the width direction as a thermally conductive member between the unit cell and the assembled battery installation portion which is the bottom surface of the battery storage case. A rubber sheet was placed and stored. This battery was designated as battery H.
（比較例１）
単電池を電池収納ケース底面である組電池設置部間に熱伝導性部材を設けなかった以外は、実施例１と同様に組電池を電池収納ケースに収納、設置した。この組電池を電池Ｉとした。
(Comparative Example 1)
The assembled battery was housed and installed in the battery housing case in the same manner as in Example 1, except that the heat conductive member was not provided between the assembled battery installation portions on the bottom surface of the battery housing case. This assembled battery was designated as Battery I.
［実験１］
上述した本発明による電池Ａ乃至Ｈと比較例による電池Ｉを、以下の条件で充放電を繰り返した時の各単電池の温度を測定した。各単電池の温度は、各単電池の中央部に熱電対を取り付けた測定した。その結果を下記表１に示す。但し、充電条件、放電条件は、次のとおりである。
充電条件：ＣＣ−ＣＶ １．０ＣＡ，３３．２Ｖ，０．０５ＣＡ Ｃｕｔ−ｏｆｆ
放電条件：ＣＣ ９．０ＣＡ，１７．２Ｖ Ｃｕｔ−ｏｆｆ
The temperature of each cell when the above-described batteries A to H according to the present invention and the battery I according to the comparative example were repeatedly charged and discharged under the following conditions was measured. The temperature of each unit cell was measured by attaching a thermocouple to the center of each unit cell. The results are shown in Table 1 below. However, charging conditions and discharging conditions are as follows.
Charging conditions: CC-CV 1.0CA, 33.2V, 0.05CA Cut-off
Discharge conditions: CC 9.0CA, 17.2V Cut-off
上記表１から分かるように、本発明の電池（電池Ａ乃至Ｈ）は、比較例（電池Ｉ）の電池と比べて単電池の温度を低く抑えることができる。また、熱伝導性部材としてカーボンシートを用いた電池Ａ及び電池Ｆは、他の熱伝導性部材を用いた電池Ｂ乃至Ｅ及び電池Ｈに比べ、単電池の温度上昇を低く抑えることが可能である。 As can be seen from Table 1 above, the batteries (batteries A to H) of the present invention can suppress the temperature of the unit cell to be lower than that of the battery of the comparative example (battery I). In addition, the battery A and the battery F using the carbon sheet as the heat conductive member can suppress the temperature rise of the unit cell to be lower than those of the batteries B to E and the battery H using the other heat conductive members. is there.
更に、単電池間に熱拡散シートを設けることで放熱性が促進され、電池Ｇのようにアルミ板を積層する各単電池表面から０．０５ｍｍずつ突出するように設けて組電池を作製することで、より熱伝導性の高い板と熱伝導性部材との密着性が向上し、他の組電池に比べて放熱性が促進されたものと考えられる。 Furthermore, heat dissipation is promoted by providing a heat diffusion sheet between the single cells, and a battery assembly is prepared by projecting 0.05 mm from the surface of each single cell on which an aluminum plate is laminated like the battery G. Therefore, it is considered that the adhesion between the plate having higher thermal conductivity and the thermal conductive member is improved, and the heat dissipation is promoted as compared with other assembled batteries.
なお、本発明は、上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施形態に開示されている複数の構成要素の適宜な組み合せにより種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。更に、異なる実施形態に亘る構成要素を適宜組み合せてもよい。 Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.
１…単電池、２…正極端子、３…負極端子、４，５…単電池接続板、６…結束具、７…熱伝導性部材、８…組電池、９…組電池設置部、１１…熱拡散シート。
DESCRIPTION OF
Claims (1)
前記複数の角形単電池と前記電池収納ケース内の設置面との間に配置した熱伝導性シリコーンゴムシートと、
前記複数の角形単電池の互いに隣接する面の間、および前記複数の角形単電池の隣接方向の端部に位置し、前記電池収納ケースの内面と対向する角形単電池の面にそれぞれ配置した複数の矩形状アルミニウム板と
を具備し、
前記各矩形状アルミニウム板は、４つの辺が前記角形電池の互いに隣接する面の４つ辺から０．０５〜０．１ｍｍ突出し、前記熱伝導性シリコーンゴムシート側に位置する前記各矩形状アルミニウム板の突出部を前記熱伝導性シリコーンゴムシートに食い込ませ、各矩形状アルミニウム板の突出部を前記熱伝導性シリコーンゴムシートに密着させ、同時に前記複数の角形単電池を前記熱伝導性シリコーンゴムシートに密着させることを特徴とする組電池。 A battery pack in which a plurality of rectangular cells are installed and stored in a battery storage case so that surfaces adjacent to each other intersect an installation surface in the battery storage case,
A thermally conductive silicone rubber sheet disposed between the plurality of rectangular cells and an installation surface in the battery storage case;
A plurality of prismatic cells that are positioned between adjacent surfaces of the plurality of prismatic cells and at an end in the adjacent direction of the plurality of prismatic cells and that are respectively disposed on the surfaces of the prismatic cells facing the inner surface of the battery storage case. With rectangular aluminum plate
Comprising
Each rectangular aluminum plate has four sides protruding 0.05 to 0.1 mm from the four sides of the adjacent surfaces of the rectangular battery, and each rectangular aluminum plate located on the thermally conductive silicone rubber sheet side. The protruding portion of the plate is bitten into the thermally conductive silicone rubber sheet, the protruding portion of each rectangular aluminum plate is brought into close contact with the thermally conductive silicone rubber sheet, and at the same time, the plurality of rectangular unit cells are connected to the thermally conductive silicone rubber. An assembled battery characterized by being adhered to a sheet .
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| WO2012147801A1 (en) * | 2011-04-27 | 2012-11-01 | 三洋電機株式会社 | Power supply device and vehicle equipped with power supply device |
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| JP5754497B2 (en) * | 2013-12-04 | 2015-07-29 | 株式会社豊田自動織機 | Battery pack and battery pack manufacturing method |
| JP5835315B2 (en) * | 2013-12-26 | 2015-12-24 | 株式会社豊田自動織機 | Power storage module unit and method for manufacturing power storage module unit |
| JP6610008B2 (en) * | 2015-06-03 | 2019-11-27 | 株式会社豊田自動織機 | Battery pack and battery pack manufacturing method |
| WO2018061738A1 (en) * | 2016-09-27 | 2018-04-05 | パナソニックＩｐマネジメント株式会社 | Battery module |
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