JP4944618B2 - Device case, battery cell and battery pack - Google Patents

Device case, battery cell and battery pack Download PDF

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JP4944618B2
JP4944618B2 JP2006548707A JP2006548707A JP4944618B2 JP 4944618 B2 JP4944618 B2 JP 4944618B2 JP 2006548707 A JP2006548707 A JP 2006548707A JP 2006548707 A JP2006548707 A JP 2006548707A JP 4944618 B2 JP4944618 B2 JP 4944618B2
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film
battery
side support
device case
housing member
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JPWO2006067903A1 (en
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猛 金井
久子 中野
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Subaru Corp
NEC Corp
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NEC Corp
Fuji Jukogyo KK
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Description

本発明の一つは、充放電可能な電気デバイス要素がフィルムによって被覆されたフィルム外装電気デバイスを収容可能なデバイスケースに関するものである。本発明の他の一つは、前記デバイスケースにフィルム外装電池を収容してなるケース入りフィルム外装電池に関するものである。   One aspect of the present invention relates to a device case that can accommodate a film-covered electrical device in which a chargeable / dischargeable electrical device element is covered with a film. Another aspect of the present invention relates to a cased film-clad battery in which a film-clad battery is accommodated in the device case.

近年、電動モータを駆動源とする電気自動車やハイブリッド電気自動車（以下、単に「電気自動車」という）の開発が急速に進められている。電気自動車に搭載される電動モータの電源には、電気自動車の操縦特性や一回の充電での走行距離等を向上させるために、小型軽量化が求められる。かかる要求に応える電源を実現すべく、特開２００１−７６６９１号公報などに開示されているフィルム外装電池が開発されている。また、前記フィルム外装電池をケース（以下「セルケース」）内に個別に収容したケース入りのフィルム外装電池（以下「電池セル」）が開発されている。さらに、前記電池セルを多数積層すると共に、積層された各電気セル同士を電気接続して所望の出力電圧が得られるようにした電池セルの集合体（以下「組電池」）も開発されている。   In recent years, development of electric vehicles and hybrid electric vehicles (hereinafter simply referred to as “electric vehicles”) using an electric motor as a drive source has been rapidly advanced. The power source of the electric motor mounted on the electric vehicle is required to be small and light in order to improve the driving characteristics of the electric vehicle, the travel distance by one charge, and the like. In order to realize a power supply that meets such requirements, a film-clad battery disclosed in Japanese Patent Application Laid-Open No. 2001-76691 has been developed. In addition, a film-cased battery (hereinafter “battery cell”) containing a case in which the film-cased battery is individually housed in a case (hereinafter “cell case”) has been developed. Further, a battery cell assembly (hereinafter referred to as “assembled battery”) has been developed in which a large number of the battery cells are stacked and the stacked electric cells are electrically connected to obtain a desired output voltage. .

特開２００１−７６６９１号公報などに開示されているフィルム外装電池の基本構造を図７に示す。このフィルム外装電池１００は、正極側活電極、負極側活電極、及び電解液からなる発電要素１０１がラミネートフィルム１０２によって被覆されている。ラミネートフィルム１０２は、アルミニウムなどの金属フィルムと熱融着性の樹脂フィルムとを重ね合わされたフィルムである。発電要素１０１を被覆している２枚のラミネートフィルム１０２の対向する４辺は、気密に溶着されている。また、溶着されたラミネートフィルム１０２の一方の短辺部１０６ａからは、フィルム状の正電極端子１０３が引き出され、他方の短辺部１０６ｂからはフィルム状の負電極端子１０４が引き出されている。   FIG. 7 shows the basic structure of a film-clad battery disclosed in Japanese Patent Application Laid-Open No. 2001-76691. In this film-clad battery 100, a power generation element 101 composed of a positive electrode side active electrode, a negative electrode side active electrode, and an electrolytic solution is covered with a laminate film 102. The laminate film 102 is a film in which a metal film such as aluminum and a heat-sealable resin film are overlaid. Four opposing sides of the two laminated films 102 covering the power generation element 101 are welded in an airtight manner. A film-like positive electrode terminal 103 is drawn out from one short side portion 106a of the laminated film 102 that has been welded, and a film-like negative electrode terminal 104 is drawn out from the other short side portion 106b.

組電池は、上記構造を有するフィルム外装電池がセルケース内に収容された電池セルを多数備える。組電池の性能は、各フィルム外装電池の温度変化に大きく左右される。そこで、フィルム外装電池の温度を管理すべく、各電池セルに温度センサが装着されることがある。この場合、より正確な温度を測定するためには、セルケース内のフィルム外装電池の表面にセンサを接触させるか、フィルム外装電池の表面の極めて近傍に温度センサを配置することが望ましい。しかし、組電池をなるべく小型化するためには、各電池セルを隙間なく積層することが必要である。従って、電池セルを積層した後に各セルケース内のフィルム外装電池の表面やその近傍に温度センサを設置することは極めて困難である。そこで従来は、予め温度センサが装着された複数の電池セルを積層して組電池を組上げていた。   The assembled battery includes a large number of battery cells in which a film-clad battery having the above structure is accommodated in a cell case. The performance of the assembled battery greatly depends on the temperature change of each film-covered battery. Therefore, a temperature sensor may be attached to each battery cell in order to manage the temperature of the film-clad battery. In this case, in order to measure a more accurate temperature, it is desirable that the sensor is brought into contact with the surface of the film-clad battery in the cell case, or that the temperature sensor is disposed very close to the surface of the film-clad battery. However, in order to reduce the size of the assembled battery as much as possible, it is necessary to stack the battery cells without gaps. Therefore, it is extremely difficult to install a temperature sensor on the surface of the film-clad battery in each cell case or in the vicinity thereof after stacking the battery cells. Therefore, conventionally, an assembled battery is assembled by laminating a plurality of battery cells each having a temperature sensor mounted in advance.

複数の電池セルに個別に温度センサを装着するには、多くの手間と時間を要する。かかる手間と時間は、組電池を構成する電池セルの数が多くなるほど増大する。センサ装着の手間と時間は、組電池の製造効率を低下させ、製造コストを上昇させる要因の一つとなっていた。例えば、電動モータによって自動車を走行させるために必要とされる３００Ｖ〜４００Ｖ程度の電圧を得るためには、１００個程度の電池セルが必要となる。１００個以上の電池セルの一つ一つに予め温度センサを装着するには、非常に多くの手間と時間を要する。   It takes a lot of work and time to attach temperature sensors individually to a plurality of battery cells. Such labor and time increase as the number of battery cells constituting the assembled battery increases. The labor and time for mounting the sensor have been one of the factors that reduce the manufacturing efficiency of the assembled battery and increase the manufacturing cost. For example, in order to obtain a voltage of about 300V to 400V that is required for running an automobile with an electric motor, about 100 battery cells are required. It takes a lot of labor and time to attach a temperature sensor to each of 100 or more battery cells in advance.

本発明の目的は、フィルム外装電気デバイスを収容可能なデバイスケースであって、複数積層されたときに、温度センサを挿入可能な空間が形成されるデバイスケースを提供することである。   An object of the present invention is to provide a device case capable of accommodating a film-clad electrical device, in which a space into which a temperature sensor can be inserted is formed when a plurality of layers are stacked.

本発明のデバイスケースは、充放電可能な電気デバイス要素がフィルムによって被覆されたフィルム外装電気デバイスを収容可能な収容部材と、前記収容部材内に収容された前記フィルム外装電気デバイスを前記収容部材の内面との間に挟持可能な保持部材とを有する。前記収容部材の外面には、他のデバイスケースと重ね合わされた際に、前記収容部材の外面と前記他のデバイスケースとの間に、温度センサが挿入される隙間を形成するための凹凸が設けられている。   The device case of the present invention includes a housing member capable of housing a film-clad electrical device in which a chargeable / dischargeable electrical device element is coated with a film, and the film-clad electrical device accommodated in the housing member. And a holding member that can be held between the inner surface and the inner surface. The outer surface of the housing member is provided with irregularities for forming a gap into which a temperature sensor is inserted between the outer surface of the housing member and the other device case when the other device case is overlaid. It has been.

前記凹凸は、収容部材の外面の一部を他の部分よりも相対的に高くすることによって形成することができる。例えば、保持部材に、フィルム外装電気デバイスの長辺部に接する長辺支持部と、短辺部に接する短辺支持部とを設け、短辺支持部又は長辺支持部の外面を他方の外面よりも高くする。また、長辺支持部又は短辺支持部の外面に凹部を設ける。   The unevenness can be formed by making a part of the outer surface of the housing member relatively higher than the other parts. For example, the holding member is provided with a long side support portion that contacts the long side portion of the film-covered electrical device and a short side support portion that contacts the short side portion, and the outer surface of the short side support portion or the long side support portion is the other outer surface. Higher than. Moreover, a recessed part is provided in the outer surface of a long side support part or a short side support part.

前記デバイスケースに、発電要素がフィルムによって被覆されたフィルム外装電池を収容して電池セルを製作することができる。前記電池セルを多数積層して組電池を製作することができる。   A battery cell can be manufactured by accommodating a film-covered battery in which a power generation element is covered with a film in the device case. A battery pack can be manufactured by stacking a large number of the battery cells.

デバイスケースの実施形態の一例を示す分解斜視図である。It is a disassembled perspective view which shows an example of embodiment of a device case. 組電池の一例を示す斜視図である。It is a perspective view which shows an example of an assembled battery. 電池セル間に挿入されたサーミスタの位置を示す斜視図である。It is a perspective view which shows the position of the thermistor inserted between battery cells. サーミスタの構造を示す平面図である。It is a top view which shows the structure of a thermistor. デバイスケースの他の実施形態を示す斜視図である。It is a perspective view which shows other embodiment of a device case. 組電池の他例を示す斜視図である。It is a perspective view which shows the other example of an assembled battery. フィルム外装電池の一例を示す斜視図である。It is a perspective view which shows an example of a film-clad battery.

以下、本発明のデバイスケースの実施形態の一例について説明する。本例のデバイスケースの収容対象である電気デバイスは、図７に示すフィルム外装電池１００である。図１に示すように、本例のデバイスケース４は、収容部材１と、保持部材２とから構成されている。さらに、収容部材１は、合成樹脂によって一体成形された底板３と、側壁５とから構成されている。底板３は、全体として枠状の形態を有する。底板３の周縁には、該垂直に立ち上げられた側壁５が設けられている。側壁５の内側にフィルム外装電池１００が収容されると、該フィルム外装電池１００の周縁部が底板３に当接する。一方、保持部材２は、収容部材１の側壁５の内側に嵌合可能な枠状の形態を有する。保持部材２をフィルム外装電池１００が収容された収容部材１の内側に嵌め込むと、フィルム外装電池１００の周縁部が収容部材１の底板３と保持部材２との間に挟まれる。尚、保持部材２の材質も合成樹脂である。以下、収容部材１及び保持部材２の詳細について説明する。   Hereinafter, an example of an embodiment of a device case of the present invention will be described. The electric device which is the accommodation target of the device case of this example is a film-clad battery 100 shown in FIG. As shown in FIG. 1, the device case 4 of this example includes a housing member 1 and a holding member 2. Further, the housing member 1 is composed of a bottom plate 3 and a side wall 5 that are integrally formed of synthetic resin. The bottom plate 3 has a frame shape as a whole. On the periphery of the bottom plate 3, the side wall 5 raised vertically is provided. When the film-clad battery 100 is accommodated inside the side wall 5, the peripheral portion of the film-clad battery 100 comes into contact with the bottom plate 3. On the other hand, the holding member 2 has a frame shape that can be fitted inside the side wall 5 of the housing member 1. When the holding member 2 is fitted inside the housing member 1 in which the film-covered battery 100 is housed, the peripheral portion of the film-covered battery 100 is sandwiched between the bottom plate 3 of the housing member 1 and the holding member 2. The material of the holding member 2 is also a synthetic resin. Hereinafter, details of the storage member 1 and the holding member 2 will be described.

収容部材１の底板３は、収容部材１に収容されたフィルム外装電池１００の４辺にそれぞれ接触する一組の長辺支持部６ａ、６ｂ及び一組の短辺支持部７ａ、７ｂを有する。一組の長辺支持部６ａ、６ｂは、フィルム外装電池１００の長辺部１０５ａ及び１０５ｂとそれぞれ接触する。短辺支持部７ａは、フィルム外装電池１００の短辺部１０６ａ及び該短辺部１０６ａから引き出されている正電極端子１０３と接触する。短辺支持部７ｂは、フィルム外装電池１００の短辺部１０６ｂ及び該短辺部１０６ｂから引き出されている負電極端子１０４と接触する。   The bottom plate 3 of the housing member 1 includes a pair of long side support portions 6 a and 6 b and a set of short side support portions 7 a and 7 b that are in contact with the four sides of the film-clad battery 100 housed in the housing member 1. The pair of long side support portions 6a and 6b are in contact with the long side portions 105a and 105b of the film-clad battery 100, respectively. The short side support part 7a contacts the short side part 106a of the film-clad battery 100 and the positive electrode terminal 103 drawn out from the short side part 106a. The short side support part 7b contacts the short side part 106b of the film-clad battery 100 and the negative electrode terminal 104 drawn out from the short side part 106b.

長辺支持部６ａ、６ｂは、帯状の形態を有し、所定間隔で平行に並んでいる。一方の短辺支持部７ａは、長辺支持部６ａ、６ｂの一端同士を連結させ、他方の短辺支持部７ｂは長辺支持部６ａ、６ｂの他端同士を連結させている。また、長辺支持部６ａ、６ｂの長手方向略中央には、流路形成部材８が掛け渡されている。流路形成部材８は、中央より長辺支持部６ｂ寄りの部分の幅が長辺支持部６ｂに近接するに従って次第に拡大されている。   The long side support portions 6a and 6b have a strip shape and are arranged in parallel at a predetermined interval. One short side support portion 7a connects one ends of the long side support portions 6a and 6b, and the other short side support portion 7b connects the other ends of the long side support portions 6a and 6b. Further, the flow path forming member 8 is stretched around the longitudinal center of the long side support portions 6a and 6b. The flow path forming member 8 is gradually enlarged as the width of the portion closer to the long side support portion 6b from the center approaches the long side support portion 6b.

ここで、保持部材１の表面のうち、該保持部材１内に収容されたフィルム外装電池１００の表面と対向する面を「内面」と称する。また、前記内面と反対側の面を「外面」と称する。短辺支持部７ａ、７ｂの外面１０は、長辺支持部６ａ、６ｂの外面１１よりも1.0mm以上高い。また、流路形成部８の外面１２も長辺支持部６ａ、６ｂの外面１１よりも1.0mm以上高い。換言すれば、短辺支持部７ａ、７ｂ及び流路形成部８の外面１０、１２と長辺支持部６ａ、６ｂの外面１１との間には1.0mm以上の段差が存在している。尚、以下の説明では、保持部材２に関しても、フィルム外装電池１００の表面と対向する面を内面、該内面と反対側の面を外面と称して区別する。   Here, the surface of the holding member 1 that faces the surface of the film-clad battery 100 housed in the holding member 1 is referred to as an “inner surface”. A surface opposite to the inner surface is referred to as an “outer surface”. The outer surface 10 of the short side support portions 7a and 7b is 1.0 mm or more higher than the outer surface 11 of the long side support portions 6a and 6b. Further, the outer surface 12 of the flow path forming portion 8 is also higher by 1.0 mm or more than the outer surface 11 of the long side support portions 6a and 6b. In other words, there is a step of 1.0 mm or more between the outer surfaces 10 and 12 of the short side support portions 7a and 7b and the flow path forming portion 8 and the outer surface 11 of the long side support portions 6a and 6b. In the following description, the holding member 2 is also distinguished by referring to the surface facing the surface of the film-clad battery 100 as the inner surface and the surface opposite to the inner surface as the outer surface.

再び図１を参照する。短辺支持部７ａ、７ｂから立ち上げられている側壁５には、フィルム外装電池１００の正電極端子１０３及び負電極端子１０４と略同一幅の第１の切欠１３が形成されている。収容部材１の内側に保持部材２を嵌め込むと、収容部材１と保持部材２との間に、電極導出口が形成される。また、収容部材１の長辺支持部６ｂから立ち上げられている側壁５には第２の切欠１６が形成されている。収容部材１の内側に保持部材２が嵌め込まれると、第２の切欠１６が保持部材２に形成されている凹部１７と突き合わされて、排煙口が形成される。尚、排煙口は、フィルム外装電池１００の安全弁１０７から排出されたガスをデバイスケース４の外に排気するためのものである。安全弁１０７は、フィルム外装電池１００の内圧が所定値以上に上昇すると、自動的に開く。   Refer to FIG. 1 again. A first notch 13 having substantially the same width as the positive electrode terminal 103 and the negative electrode terminal 104 of the film-covered battery 100 is formed on the side wall 5 raised from the short side support portions 7a and 7b. When the holding member 2 is fitted inside the housing member 1, an electrode lead-out port is formed between the housing member 1 and the holding member 2. Further, a second notch 16 is formed in the side wall 5 raised from the long side support portion 6 b of the housing member 1. When the holding member 2 is fitted inside the housing member 1, the second notch 16 is abutted with the recess 17 formed in the holding member 2, and a smoke exhaust port is formed. Note that the smoke exhaust port is for exhausting the gas discharged from the safety valve 107 of the film-clad battery 100 to the outside of the device case 4. The safety valve 107 automatically opens when the internal pressure of the film-clad battery 100 rises above a predetermined value.

以上の構造を有するデバイスケース４内にフィルム外装電池１００を収容して電池セル１８を形成する。形成された電池セル１８を図２に示すように同一の向きで多数枚積層させると組電池２０が組み上がる。このとき、隣接する電池セル１８（デバイスケース４）の間に隙間２１が形成される。具体的には、複数の電池セル１８（デバイスケース４）を同一の向きで積層すると、あるデバイスケース４の収容部材１と、このデバイスケース４に隣接する他のデバイスケース４の保持部材２とが突き合わされる。このとき、収容部材１の短辺支持部７ａ、７ｂ及び流路形成部８の外面１０、１２と、長辺支持部６ａ、６ｂの外面１１との間には前記段差が存在している。一方、保持部材２の外面２２（図１）は平坦である。従って、一方のデバイスケース４の収容部材１の長辺支持部６ａ、６ｂの外面１１と、他方のデバイスケース４の保持部材２の外面２２との間に前記段差に応じた隙間２１が形成される。これに対し、一方のデバイスケース４の短辺支持部７ａ、７ｂ及び流形成部８の外面１０、１２と、他方のデバイスケース４の保持部材２の外面２２とはほぼ隙間なく密着する。よって、所望数の電池セル１８を積層して組電池２０を組み立てた後に、隣接する電池セル１８間に形成されている隙間２１に温度センサ（サーミスタ２３）を挿入することができる。尚、図２では、便宜上一部の隙間２１のみを図示し、その他は省略してある。また、各デバイスケース４からは、図１に示す正電極端子１０３及び負電極端子１０４が引き出されているが、これも便宜上の理由から図示を省略してある。   The battery case 18 is formed by accommodating the film-clad battery 100 in the device case 4 having the above structure. When a large number of the formed battery cells 18 are stacked in the same direction as shown in FIG. 2, the assembled battery 20 is assembled. At this time, a gap 21 is formed between adjacent battery cells 18 (device case 4). Specifically, when a plurality of battery cells 18 (device case 4) are stacked in the same direction, a housing member 1 of a certain device case 4 and a holding member 2 of another device case 4 adjacent to the device case 4 Are matched. At this time, the step is present between the outer side surfaces 10 and 12 of the short side support portions 7a and 7b and the flow path forming portion 8 of the housing member 1 and the outer surface 11 of the long side support portions 6a and 6b. On the other hand, the outer surface 22 (FIG. 1) of the holding member 2 is flat. Accordingly, a gap 21 corresponding to the step is formed between the outer surface 11 of the long side support portions 6 a and 6 b of the housing member 1 of one device case 4 and the outer surface 22 of the holding member 2 of the other device case 4. The On the other hand, the short side support portions 7a and 7b of the one device case 4 and the outer surfaces 10 and 12 of the flow forming portion 8 and the outer surface 22 of the holding member 2 of the other device case 4 are in close contact with each other. Therefore, after assembling the assembled battery 20 by stacking a desired number of battery cells 18, the temperature sensor (thermistor 23) can be inserted into the gap 21 formed between the adjacent battery cells 18. In FIG. 2, only a part of the gaps 21 is shown for convenience, and the others are omitted. Further, from each device case 4, the positive electrode terminal 103 and the negative electrode terminal 104 shown in FIG. 1 are drawn out, but this is also omitted for convenience.

隙間２１は、各デバイスケース４の流路形成部８と短辺支持部７ａとの間、及び流路形成部８と短辺支持部７ｂとの間の二箇所に形成される。一方の隙間２１にのみサーミスタ２３を挿入してもよく、双方の隙間２１にサーミスタ２３を挿入してもよい。さらには、隙間２１内の何れの位置にサーミスタ２３を挿入するかも任意に決定することができる。もっとも、フィルム外装電池１００は、その中心部ほど高温になる特性を有するので、温度管理の観点からは中心部の温度をより正確に測温可能な位置にサーミスタ２３を挿入することが望ましい。例えば、図３に示すように、流路形成部８と短辺支持部７ｂとの間に形成された隙間２１に、流路形成部８の側面２４に沿ってサーミスタ２３を挿入することが望ましい。図３に示す位置にサーミスタ２３を挿入すると、フィルム外装電池１００の中心に近い位置にサーミスタ２３が配置されるばかりでなく、組電池２０内における複数のサーミスタ２３の配置位置のバラツキも少なくなる。   The gap 21 is formed at two locations between the flow path forming portion 8 and the short side support portion 7a of each device case 4 and between the flow path forming portion 8 and the short side support portion 7b. The thermistor 23 may be inserted only into one gap 21, or the thermistor 23 may be inserted into both gaps 21. Furthermore, it is possible to arbitrarily determine at which position in the gap 21 the thermistor 23 is inserted. However, since the film-covered battery 100 has a characteristic that the temperature increases at the center, it is desirable to insert the thermistor 23 at a position where the temperature of the center can be measured more accurately from the viewpoint of temperature management. For example, as shown in FIG. 3, it is desirable to insert the thermistor 23 along the side surface 24 of the flow path forming portion 8 in the gap 21 formed between the flow path forming portion 8 and the short side support portion 7b. . When the thermistor 23 is inserted at the position shown in FIG. 3, not only the thermistor 23 is disposed at a position close to the center of the film-covered battery 100, but also variation in the arrangement positions of the plurality of thermistors 23 in the assembled battery 20 is reduced.

次に、図３に示すサーミスタ２３の構造について図４を参照しながら詳細に説明する。サーミスタ２３は、測温電極３０をその一部が露出するようにして樹脂でモールドしたものである。測温電極３０をモールドしている樹脂（モールド樹脂３１）は、測温電極３０の軸線に沿って細長く、かつ、ある程度の弾性を備えている。モールド樹脂３１は、測温電極３０に何らかの外力が作用した際に、測温電極３１が屈曲しないように保護する役割を有する。特に、サーミスタ２３を上記のようにして隙間２１へ挿入する際に、サーミスタ２３の先端を誤ってデバイスケース４の何処かにぶつけてしまっても、測温電極３０が屈曲しないように保護する役割を有する。さらに、モールド樹脂３１の先端３２は、隙間２１への挿入時に、フィルム外装電池１００の表面を傷付けることがないように円弧面とされている。また、モールド樹脂３１の後端には、他の部分よりも径の大きなストッパー３３が一体に形成されている。このストッパー３３は、サーミスタ２３が所定長だけ隙間２１へ挿入されると、長尺支持部６ａの外側面３５に当たって、サーミスタ２３がそれ以上隙間２１内へ挿入されることを規制する（図３参照）。さらに、モールド樹脂３１の長手方向所定位置には、略三角形の係止部３６が一体に形成されている。この係止部３６は、サーミスタ２３が所定長だけ隙間２１へ挿入されると、長尺支持部６ａの内側面３７に係止し、サーミスタ２３の抜けを防止する。長尺支持部６ａの外面１１に、係止部３６が係止可能な突起を設けておくこともできる。尚、サーミスタ２３は、測温電極３０の露出している部分がフィルム外装電池１００の表面と対向する向きで隙間２１へ挿入される。   Next, the structure of the thermistor 23 shown in FIG. 3 will be described in detail with reference to FIG. The thermistor 23 is obtained by molding the temperature measuring electrode 30 with a resin so that a part thereof is exposed. The resin molding the temperature measuring electrode 30 (mold resin 31) is elongated along the axis of the temperature measuring electrode 30 and has a certain degree of elasticity. The mold resin 31 has a role of protecting the temperature measuring electrode 31 from being bent when some external force is applied to the temperature measuring electrode 30. In particular, when the thermistor 23 is inserted into the gap 21 as described above, the temperature measuring electrode 30 is protected from bending even if the tip of the thermistor 23 is accidentally hit anywhere on the device case 4. Have Further, the tip 32 of the mold resin 31 has an arcuate surface so as not to damage the surface of the film-clad battery 100 when inserted into the gap 21. In addition, a stopper 33 having a larger diameter than other portions is integrally formed at the rear end of the mold resin 31. When the thermistor 23 is inserted into the gap 21 by a predetermined length, the stopper 33 abuts against the outer surface 35 of the long support portion 6a and restricts further insertion of the thermistor 23 into the gap 21 (see FIG. 3). ). Further, a substantially triangular locking portion 36 is integrally formed at a predetermined position in the longitudinal direction of the mold resin 31. When the thermistor 23 is inserted into the gap 21 by a predetermined length, the locking portion 36 is locked to the inner side surface 37 of the long support portion 6a and prevents the thermistor 23 from coming off. A protrusion that can be locked by the locking portion 36 may be provided on the outer surface 11 of the long support portion 6a. The thermistor 23 is inserted into the gap 21 so that the exposed portion of the temperature measuring electrode 30 faces the surface of the film-clad battery 100.

図５に示すように、保持部材１の長尺支持部６ａの外面にサーミスタ２３を嵌め込み可能な凹部４０を形成することによって、隣接する電池セル１８間に、サーミスタ２３を挿入可能とすることもできる。すなわち、図５に示すような凹部４０が形成された収容部材１を備えたデバイスケース４内にフィルム外装電池１００を収容して電池セル１８とする。電池セル１８を複数枚積層させると、図６に示すように、隣接する電池セル１８（隣接するデバイスケース４）間に、サーミスタ２３を挿入可能な挿入口４１が形成される。さらに、保持部材１に、図５に示すような凹部４０が形成されていれば、該収容部材１の長辺支持部６ａ及び流路形成部８の外面１１、１２と、短辺支持部７ａ、７ｂの外面１０とが面一であってもサーミスタ２３の挿入が阻害されることはない（図５、図６参照）。   As shown in FIG. 5, the thermistor 23 can be inserted between the adjacent battery cells 18 by forming a recess 40 into which the thermistor 23 can be fitted on the outer surface of the long support portion 6 a of the holding member 1. it can. That is, the film-clad battery 100 is accommodated in the device case 4 provided with the accommodating member 1 in which the recess 40 as shown in FIG. When a plurality of battery cells 18 are stacked, as shown in FIG. 6, an insertion port 41 into which the thermistor 23 can be inserted is formed between adjacent battery cells 18 (adjacent device cases 4). Furthermore, if the holding member 1 has a recess 40 as shown in FIG. 5, the long side support portion 6 a of the housing member 1 and the outer surfaces 11 and 12 of the flow path forming portion 8, and the short side support portion 7 a. Even if the outer surface 10 of 7b is flush with the outer surface 10, insertion of the thermistor 23 is not hindered (see FIGS. 5 and 6).

これまでは、温度センサがサーミスタである場合を例にとって本発明の実施形態を説明した。しかし、温度センサは、サーミスタ以外の測温抵抗体（例えば、白金測温抵抗体）であってもよい。また、フィルム外装電池の表面温度を側温可能な温度センサであれば、測温抵抗体以外の温度センサであってもよい。また、フィルム外装電気デバイスは、フィルム外装電池に限定されるものではない。例えば、電気エネルギを内部に蓄積可能な電気デバイス要素（例えば、電気二重層キャパシタや電解コンデンサに代表されるキャパシタ素子）が外装用フィルムによって被覆されたフィルム外装電気デバイスも含まれる。   So far, the embodiments of the present invention have been described taking the case where the temperature sensor is a thermistor as an example. However, the temperature sensor may be a resistance temperature detector (for example, a platinum resistance temperature detector) other than the thermistor. Further, any temperature sensor other than the resistance temperature detector may be used as long as it is a temperature sensor capable of laterally measuring the surface temperature of the film-clad battery. The film-clad electrical device is not limited to a film-clad battery. For example, a film-covered electric device in which an electric device element (for example, a capacitor element typified by an electric double layer capacitor or an electrolytic capacitor) capable of storing electric energy is covered with a covering film is also included.

本発明によれば、２以上のデバイスケースを重ね合わせた際に、隣接するデバイスケース間に温度センサを挿入可能な隙間が形成される。従って、フィルム外装電気デバイスが収容されたデバイスケースを２以上積層させてデバイス集合体を形成した後に、隣接するデバイスケース間に、フィルム外装電気デバイスの表面や表面近傍の温度を測定するための温度センサを配置することができる。
According to the present invention, when two or more device cases are overlapped, a gap in which a temperature sensor can be inserted is formed between adjacent device cases. Therefore, after two or more device cases containing film-covered electrical devices are stacked to form a device assembly, the temperature for measuring the temperature of the surface of the film-covered electrical device or the vicinity of the surface between adjacent device cases Sensors can be placed.

Claims (9)

充放電可能な電気デバイス要素がフィルムによって被覆されたフィルム外装電気デバイスを収容可能な収容部材と、前記収容部材内に収容された前記フィルム外装電気デバイスを前記収容部材の内面との間に挟持可能な保持部材とを有するデバイスケースであって、
前記収容部材の外面に、他のデバイスケースと重ね合わされた際に、前記収容部材の外面と前記他のデバイスケースとの間に、温度センサが挿入される隙間を形成するための凹凸が設けられているデバイスケース。A chargeable / dischargeable electrical device element can be sandwiched between a housing member capable of housing a film-covered electrical device covered with a film, and the film-covered electrical device housed in the housing member. A device case having a holding member,
The outer surface of the housing member is provided with irregularities for forming a gap into which the temperature sensor is inserted between the outer surface of the housing member and the other device case when overlapped with the other device case. Device case. 前記収容部材は、該収容部材内に収容された前記フィルム外装電気デバイスの長辺部に接する長辺支持部と、前記フィルム外装電気デバイスの短辺部に接する短辺支持部とを有し、前記短辺支持部の外面が前記長辺支持部の外面よりも高い位置にある請求項１記載のデバイスケース。  The housing member has a long side support portion that contacts a long side portion of the film-covered electrical device housed in the housing member, and a short side support portion that contacts a short side portion of the film-wrapped electrical device, The device case according to claim 1, wherein an outer surface of the short side support portion is at a position higher than an outer surface of the long side support portion. 前記収容部材は、該収容部材内に収容された前記フィルム外装電気デバイスの長辺部に接する長辺支持部と、前記フィルム外装電気デバイスの短辺部に接する短辺支持部とを有し、前記長辺支持部の外面には、凹部が形成されている請求項１記載のデバイスケース。  The housing member has a long side support portion that contacts a long side portion of the film-covered electrical device housed in the housing member, and a short side support portion that contacts a short side portion of the film-wrapped electrical device, The device case according to claim 1, wherein a concave portion is formed on an outer surface of the long side support portion. 請求項１記載のデバイスケースに、発電要素がフィルムによって被覆されたフィルム外装電池が収容されている電池セル。  The battery cell in which the film-cased battery with which the electric power generation element was coat | covered with the film was accommodated in the device case of Claim 1. 請求項２記載のデバイスケースに、発電要素がフィルムによって被覆されたフィルム外装電池が収容されている電池セル。  A battery cell in which a film-cased battery in which a power generation element is covered with a film is accommodated in the device case according to claim 2. 請求項３記載のデバイスケースに、発電要素がフィルムによって被覆されたフィルム外装電池が収容されている電池セル。  The battery case in which the film-clad battery with which the electric power generation element was coat | covered with the film is accommodated in the device case of Claim 3. 請求項４記載の電池セルが２以上積層され、隣接するデバイスケース間の隙間に温度センサが配置されている組電池。  An assembled battery in which two or more battery cells according to claim 4 are stacked and a temperature sensor is disposed in a gap between adjacent device cases. 請求項５記載の電池セルが２以上積層され、隣接するデバイスケース間の隙間に温度センサが配置されている組電池。  An assembled battery in which two or more battery cells according to claim 5 are stacked and a temperature sensor is arranged in a gap between adjacent device cases. 請求項６記載の電池セルが２以上積層され、隣接するデバイスケース間の隙間に温度センサが配置されている組電池。  An assembled battery in which two or more battery cells according to claim 6 are laminated and a temperature sensor is arranged in a gap between adjacent device cases.
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