JP2003162989A - Battery pack - Google Patents
Battery packInfo
- Publication number
- JP2003162989A JP2003162989A JP2002165131A JP2002165131A JP2003162989A JP 2003162989 A JP2003162989 A JP 2003162989A JP 2002165131 A JP2002165131 A JP 2002165131A JP 2002165131 A JP2002165131 A JP 2002165131A JP 2003162989 A JP2003162989 A JP 2003162989A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- assembled battery
- unit cell
- unit cells
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Battery Mounting, Suspending (AREA)
Abstract
Description
【発明の属する技術分野】本発明は、複数個の二次電池
単電池を組み合わせて成る組電池に係り、特に小型の二
次電池を組み合わせて電気自動車等のモータ駆動用電池
として公的に使用できる組電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembled battery formed by combining a plurality of secondary battery unit cells, and particularly publicly used as a motor drive battery for electric vehicles by combining small secondary batteries. Regarding the assembled battery that can be.
【０００１】[0001]
【従来の技術】近年、環境保護運動の高まりを背景とし
て、二酸化炭素排出規制が切に望まれる中、自動車業界
ではガソリン車等の化石燃料を使用する自動車に替え
て、電気自動車(EV)、ハイブリッド自動車(HEV)、燃料
電池自動車（FCV）の導入を促進すべく、これらの実用
化の鍵を握るモータ駆動用電池の開発が鋭意行われてい
る。この用途には、繰り返し充電が可能な二次電池が使
用される。EV、HEV、FCVのモータ駆動のような高出力及
び高エネルギー密度が要求される用途では、単一の大型
電池は事実上作れず、複数個の電池を直列に接続して構
成した組電池を使用することがこれまで一般的であっ
た。2. Description of the Related Art In recent years, carbon dioxide emission regulations have been eagerly awaited against the backdrop of increasing environmental protection movements, and in the automobile industry, electric vehicles (EV) are being replaced by vehicles using fossil fuels such as gasoline vehicles. In order to promote the introduction of hybrid vehicles (HEVs) and fuel cell vehicles (FCVs), the development of motor drive batteries that hold the key to their practical use is being eagerly pursued. A rechargeable secondary battery is used for this purpose. For applications that require high output and high energy density, such as EV, HEV, and FCV motor drives, it is practically impossible to make a single large battery, and an assembled battery composed of multiple batteries connected in series can be used. It has been common to use.
【０００２】しかし、この方法では単位電池の容量を非
常に大きくする必要があり、専用の製造ラインを設けて
生産する必要があった。また特に大容量が必要とされる
EV用電池等では、1個の電池が非常に重くなり取り扱い
が困難である。However, with this method, it is necessary to make the capacity of the unit battery extremely large, and it is necessary to provide a dedicated production line for production. Also especially large capacity is required
For EV batteries, etc., one battery is very heavy and difficult to handle.
【０００３】そこで、取り扱いの容易な小型の電池（以
下、素電池と記載する）を多数接続して、EV、HEV、FCV
用途に供することが考えられている。また、高出力、高
エネルギ密度であるリチウムイオン二次電池を自動車用
組電池として充放電に使用する場合、素電池を複数個並
列に接続したグループを直列に接続した組電池を用い、
全体として400Vの電圧を得るように考えられている。ま
た、自動車用12V,42Vバッテリーを更に高性能、コンパ
クト、低コストにするためには民生用のリチウムイオン
電池を利用することが有望となってくる。また、高い電
圧が要求される自動車用組電池を構成する素電池として
は、集電対の一方の面に正極が形成され、他方の面に負
極を形成されたバイポーラ電極を、固体高分子電解質を
挟んで複数枚直列に積層したバイポーラリチウムイオン
二次電池も有望である。Therefore, a large number of small batteries (hereinafter referred to as unit cells) that are easy to handle are connected to EV, HEV, FCV
It is considered to be used for purposes. Further, when using a high-output, high-energy-density lithium-ion secondary battery for charging and discharging as a battery pack for automobiles, a battery pack in which a plurality of unit cells are connected in parallel is used,
Overall it is designed to get a voltage of 400V. Further, in order to further improve the performance, compactness, and cost reduction of the 12V and 42V batteries for automobiles, it will be promising to use consumer-use lithium ion batteries. Further, as a unit cell constituting an assembled battery for automobiles that requires a high voltage, a bipolar electrode having a positive electrode formed on one surface of a current collector and a negative electrode formed on the other surface is a solid polymer electrolyte. A promising bipolar lithium-ion secondary battery in which a plurality of sheets are stacked in series with sandwiching therebetween is also promising.
【０００４】ここで、電気自動車用組電池は、常に振動
が加わる状態で使用されるため、素電池内部における集
電片の破断や集電溶接部の破断等の構造破壊、素電池を
電気的に接続した接続タブの破断等の不具合が発生しな
いための耐振動性が要求されている。Here, since the assembled battery for an electric vehicle is used in a state where vibration is constantly applied, structural damage such as breakage of a current collecting piece and breakage of a current collecting weld portion inside the unit battery, and electrical damage to the unit battery Vibration resistance is required so that the connection tab connected to the connection does not cause a failure such as breakage.
【０００５】上述のような、素電池を複数個接続した組
電池の従来技術として、例えば特開平１１−２７３６４
３号公報に記載の技術がある。この公報には、図１３に
示すように、金属等からなる円筒形の缶に収装された素
電池の両端が、支持体に緩衝部材である連結ゴムを介し
て支持されている。また、支持体内には素電池が２つ
（２以上の複数個でもよい）組み込まれ、このケースを
１つのサブモジュールとして複数個接続することができ
るよう構成されている。As a conventional technique of the assembled battery in which a plurality of unit cells are connected as described above, for example, JP-A-11-27364
There is a technique described in Japanese Patent No. 3 publication. In this publication, as shown in FIG. 13, both ends of a unit cell housed in a cylindrical can made of metal or the like are supported by a support through a connecting rubber that is a buffer member. Further, two unit cells (a plurality of unit cells may be plural) may be incorporated in the support body, and a plurality of cases may be connected as one sub-module.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、このよ
うな組電池においては、缶の両側の連結部だけにゴムの
緩衝部材を設定しており、缶と支持体の間は空気を介し
ているのみであるため、加振されると缶の長さ方向の一
次、二次等の固有振動周波数において缶の中央部、もし
くは1/4，3/4波長部での振幅が大きく、缶の円筒側面が
疲労を起こすおそれがあった。更にその応力が缶の両側
緩衝部材に直接かかるため、緩衝部材の耐久性を低下さ
せるおそれがあった。However, in such an assembled battery, rubber cushioning members are provided only at the connecting portions on both sides of the can, and only air is interposed between the can and the support. Therefore, when it is vibrated, the amplitude at the center of the can, or at the 1/4 or 3/4 wavelength part is large at the natural vibration frequencies such as the primary and secondary vibrations in the length direction of the can. Could cause fatigue. Further, since the stress is directly applied to the cushioning members on both sides of the can, there is a possibility that the durability of the cushioning member is reduced.
【０００７】また、素電池の上面もしくは下面のみに正
極と負極の両極が位置する素電池においては、両極が位
置する側のみで支持する必要があり、更に加振に対して
耐久性を確保することが困難である。Further, in the unit cell in which both the positive electrode and the negative electrode are located only on the upper surface or the lower surface of the unit cell, it is necessary to support only on the side where the both electrodes are located, and further durability against vibration is secured. Is difficult.
【０００８】仮に、缶と支持体との間に緩衝部材等を充
填することを考えた場合、従来技術のような素電池は、
周りを緩衝部材等で覆ってしまうと、メインテナンスを
必要とするため、取り外しの容易さを損なうとともに、
熱がこもってしまい、電池自体の耐久性の悪化を招くと
いう問題があった。If it is considered to fill a cushioning member or the like between the can and the support, a unit cell like the prior art is
If you cover the surroundings with a cushioning member, etc., maintenance will be required, which will reduce the ease of removal and
There is a problem that heat is accumulated and the durability of the battery itself is deteriorated.
【０００９】本発明は、上記問題点に着目してなされた
もので、その目的とするところは、複数の素電池が組み
合わされた組電池において、加振されたとしても構造破
壊や接続タブの破断が起きることなく、安定した性能を
発揮することが可能な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 the above problems, and an object of the present invention is to provide a battery pack in which a plurality of unit cells are combined, even if it is vibrated, and structural damage or connection tab It is an object of the present invention to provide an assembled battery capable of exhibiting stable performance without breakage.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するた
め、請求項１記載の発明では、少なくとも２以上の素電
池を支持体内に設置した組電池において、前記素電池を
ラミネート外装した薄型ラミネート電池とし、前記素電
池を少なくとも１以上の樹脂群によって被覆したことを
特徴とする。In order to achieve the above object, the invention according to claim 1 is an assembled battery in which at least two unit cells are installed in a support body, and a thin laminated battery in which the unit cells are laminated and packaged. The unit cell is covered with at least one resin group.
【００１１】[0011]
【発明の作用および効果】本願発明にあっては、素電池
をメインテナンスフリーのラミネート外装した薄型ラミ
ネート電池とすることで、樹脂で被覆することが可能と
なり、メインテナンス上不利となることがない。また、
充放電によって体積変化が無いため、樹脂で被覆したと
しても支持体等に影響を与えることがない。また、樹脂
で被覆することで外部から入力される振動を十分に減衰
することが可能となり、素電池の耐久性の向上を図るこ
とができる。更に、防水性、防湿性、冷熱サイクル性、
耐熱安定性、絶縁性、難燃性の向上を図ることができ
る。In the present invention, since the unit cell is a maintenance-free thin laminated battery with a laminated outer package, it can be covered with a resin, which is not disadvantageous in terms of maintenance. Also,
Since there is no volume change due to charge and discharge, it does not affect the support or the like even if it is coated with resin. Further, by coating with resin, it becomes possible to sufficiently damp vibrations input from the outside, and it is possible to improve the durability of the unit cell. Furthermore, waterproofness, moisture resistance, thermal cycleability,
It is possible to improve heat resistance stability, insulation properties, and flame retardancy.
【００１２】[0012]
【発明の実施の形態】以下、図面に基づいて本発明の実
施の形態を説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００１３】（実施の形態１）図１は実施の形態１の組
電池を表す上面図、端面図及びＡ−Ａ断面図である。ま
ず構成を説明すると、１は支持体、２は各素電池４の充
放電状態をコントロールするセルコントローラ、３は外
部端子、４はラミネートパックされた素電池、５は各素
電池４を接続するバスバー、６は素電池の端子と外部端
子を接続する接続リード、７は素電池４と支持体１の間
に充填された樹脂である。(Embodiment 1) FIG. 1 is a top view, an end view, and an AA sectional view showing an assembled battery according to a first embodiment. First, the configuration will be described. 1 is a support body, 2 is a cell controller that controls the charging / discharging state of each unit cell 4, 3 is an external terminal, 4 is a laminated-packed unit cell, and 5 is each unit cell 4 connected. A bus bar, 6 is a connecting lead for connecting the terminal of the unit cell to an external terminal, and 7 is a resin filled between the unit cell 4 and the support 1.
【００１４】この組電池に組み込まれる素電池４は、図
２の素電池４の上面図及び側面図に示すように、ラミネ
ート外装されたシート型の電池本体４ａと、電池本体４
ａの両端に設けられ正極及び負極となるタブ４ｂから構
成されている。また、図３の組電池の概略斜視図に示す
ように、各素電池４を２並列に接続した素電池群１０を
バスバー５によりタブ４ｂを接続することで１２直列に
接続し、４×６列となるように支持体１内に樹脂７とと
もに収装する。各素電池４の隙間は樹脂７が充填され、
電池外部からの加振によって素電池４やタブ４ｂ及びバ
スバー５等に十分に振動が伝わりにくいよう構成されて
いる。また、ここで薄型ラミネート電池である素電池４
には、正極活物質にマンガン酸リチウム、負極活物質に
カーボンを用いたリチウムイオン二次電池、もしくは、
集電体の一方の面に正極が形成され、他方の面に負極が
形成されたバイポーラ電極を、固体高分子電解質を挟ん
で複数枚直列に積層したバイポーラリチウムイオン二次
電池を用いることが望ましい。As shown in the top view and side view of the unit cell 4 of FIG. 2, the unit cell 4 incorporated in this assembled battery is a laminated sheet-type battery body 4a, and the battery body 4
The tabs 4b are provided at both ends of a and serve as a positive electrode and a negative electrode. Further, as shown in the schematic perspective view of the assembled battery of FIG. 3, the unit cells group 10 in which the unit cells 4 are connected in two parallel are connected in 12 series by connecting the tabs 4b by the bus bar 5 to form a 4 × 6 unit. The resin 7 is housed in the support 1 so as to form a row. The resin 7 is filled in the gaps between the unit cells 4,
Vibration is sufficiently transmitted to the unit cell 4, the tabs 4b, the bus bar 5 and the like by vibration from the outside of the battery. Also, here, the unit cell 4 which is a thin laminated battery
Includes a lithium ion secondary battery using lithium manganate as the positive electrode active material and carbon as the negative electrode active material, or
It is desirable to use a bipolar lithium ion secondary battery in which a plurality of bipolar electrodes each having a positive electrode formed on one surface of a current collector and a negative electrode formed on the other surface are stacked in series with a solid polymer electrolyte sandwiched therebetween. .
【００１５】ここで、組電池の防振構造について説明す
る。図４は、実施の形態１において使用される素電池４
の１つを、タブ４ｂによって支持体に支持した場合の１
自由度のマスバネモデルである。素電池本体４ａの質量
をＭとすると、支持体に物理的に設置されたタブ４ｂの
バネ定数ｋ１と支持体内の空気のバネ定数ｋ２が並列接
続されたモデルになると考えられる。通常では、空気バ
ネが非常に小さいため、支持体に入る振動はタブ４ｂ部
のバネが素電池本体４ａの質量によって振られ、その振
幅により、タブ４ｂに各方向から応力がかかることにな
る。従って、構造的にタブ４ｂ部が弱くなり、接続部の
強度が低下する虞がある。Here, the vibration isolation structure of the assembled battery will be described. FIG. 4 shows a unit cell 4 used in the first embodiment.
1 when one of the two is supported by the support by the tab 4b.
This is a mass-spring model with degrees of freedom. When the mass of the unit cell body 4a is M, it is considered that the model is a model in which the spring constant k1 of the tab 4b physically installed on the support and the spring constant k2 of air in the support are connected in parallel. Normally, since the air spring is very small, the vibration of the tab 4b is vibrated by the mass of the unit cell body 4a, and the vibration of the tab 4b causes stress to the tab 4b from each direction. Therefore, the tab 4b portion is structurally weakened, and the strength of the connection portion may be reduced.
【００１６】図５は、実施の形態１において使用される
素電池４の１つを、タブ４ｂ及び充填された樹脂７によ
って支持体に支持した場合の１自由度のマスバネモデル
である。図４で示した空気バネの部分が樹脂バネに置換
され、樹脂７のバネ定数の絶対値がタブ４ｂのバネ定数
の絶対値に近くなるため、該マスバネ系の一次共振周波
数が高周波にシフトする。また、入力が同じ場合には、
バネ定数の増加により、振幅が反比例で小さくなるた
め、タブ４ｂ部にかかる変位の絶対値が減少する。更
に、樹脂ダンピングにより振動エネルギを熱エネルギに
変換するため、効率的に振動エネルギを低減することが
できる。FIG. 5 shows a mass spring model with one degree of freedom when one of the unit cells 4 used in the first embodiment is supported on a support by the tab 4b and the filled resin 7. The air spring portion shown in FIG. 4 is replaced with a resin spring, and the absolute value of the spring constant of the resin 7 becomes close to the absolute value of the spring constant of the tab 4b, so that the primary resonance frequency of the mass spring system shifts to a high frequency. . If the input is the same,
As the spring constant increases, the amplitude decreases in inverse proportion, so that the absolute value of the displacement applied to the tab 4b portion decreases. Further, since the vibration energy is converted into heat energy by resin damping, the vibration energy can be efficiently reduced.
【００１７】本実施の形態１における組電池は、それぞ
れの素電池４の厚さ(mm)、素電池４の面密度(kg/m2)、
素電池４の間の樹脂群の厚さ、面密度、種類を操作する
ことにより、素電池４を質量部とし、タブ４ｂ部及び樹
脂群をバネ部とした少なくとも２自由度以上の振動計に
おいて、一次共振周波数、二次共振周波数を任意に設定
することができる。In the assembled battery according to the first embodiment, the thickness (mm) of each unit cell 4, the surface density (kg / m 2 ) of each unit cell 4,
In a vibrometer having at least two degrees of freedom, in which the unit cell 4 is a mass part and the tab 4b part and the resin group are spring parts by operating the thickness, surface density, and type of the resin group between the unit cells 4. The primary resonance frequency and the secondary resonance frequency can be set arbitrarily.
【００１８】実施の形態１における組電池は、厳密に
は、図７に示すように、素電池４を質量部とし、タブ４
ｂ部及び樹脂群をバネ部とした４自由度、またはそれ以
上の多自由度のマスバネ系を形成している。素電池４が
２以上の組電池では、素電池の数の自由度を有するマス
バネ系となり、振動のエネルギを減衰させる。Strictly speaking, the assembled battery according to the first embodiment has the unit cell 4 as a mass part and the tab 4 as shown in FIG.
A mass spring system having four degrees of freedom or more degrees of freedom is formed by using the portion b and the resin group as a spring portion. In the case of an assembled battery in which the unit cells 4 are two or more, a mass spring system having a degree of freedom of the number of unit cells is provided, and vibration energy is attenuated.
【００１９】ここで、図６に示す２自由度のマスバネ系
を用いて固有角振動数（共振振動周波数）ω１，ω２を
算出すると、タブ４ｂ部及び樹脂ａ，ｅの並列バネ定
数、素電池４の質量により、下記の式からほぼ決定され
る。Here, when the natural angular frequencies (resonance vibration frequencies) ω1 and ω2 are calculated using the mass spring system having two degrees of freedom shown in FIG. 6, the parallel spring constants of the tab 4b portion and the resins a and e, and the unit cell are calculated. The mass of 4 determines approximately from the following formula.
ω１：一次共振周波数
ω２：二次共振周波数
ｍ１：素電池ａの質量
ｍ２：素電池ｂの質量
ｋ３：樹脂ａのバネ定数と素電池ａのタブ部のバネ定数
との並列バネ定数
ｋ４：樹脂ｅのバネ定数と素電池ｂのタブ部のバネ定数
との並列バネ定数
本実施の形態１の組電池は、完全な２自由度型、または
多自由度型マスバネ系ではないため、上式では完全に説
明することができないが、上式を参考に性能のチューニ
ングを行うことができる。 ω1: primary resonance frequency ω2: secondary resonance frequency m1: mass of the unit cell a m2: mass of the unit cell b k3: parallel spring constant of the spring constant of the resin a and the spring constant of the tab of the unit cell a k4: resin The parallel spring constant of the spring constant of e and the spring constant of the tab portion of the unit cell b is not a perfect 2-degree-of-freedom type or multi-degree-of-freedom type mass spring system. Although it cannot be explained completely, the performance can be tuned by referring to the above formula.
【００２０】特に本願発明の目的は、自動車に使用する
場合に自動車に発生する振動周波数の周波数範囲内から
組み電池の共振周波数を除外することである。多自由度
のマスバネ系では共振周波数を無くすことは不可能であ
るが、自動車上で発生しうる周波数範囲内から組電池の
共振周波数を除外することは可能となる。これにより自
動車上で使用する限り、組電池は共振周波数に達するこ
とがない。特に素電池質量や樹脂種類を変化させること
により、多自由度マスバネ系の一次共振周波数と二次共
振周波数を100Hz以上に任意に設定することができる。Particularly, the object of the present invention is to exclude the resonance frequency of the assembled battery from the frequency range of the vibration frequency generated in the automobile when used in the automobile. It is impossible to eliminate the resonance frequency in a mass-spring system with multiple degrees of freedom, but it is possible to exclude the resonance frequency of the battery pack from the frequency range that can occur on an automobile. As a result, the assembled battery does not reach the resonance frequency as long as it is used on an automobile. In particular, the primary resonance frequency and the secondary resonance frequency of the multi-degree-of-freedom mass spring system can be arbitrarily set to 100 Hz or higher by changing the mass of the unit cell or the resin type.
【００２１】ここで、本実施の形態１で使用するラミネ
ート型の素電池４の場合には、特にタブ４ｂ部が強度的
に弱いため、外部の振動によって金属疲労が発生しやす
い。特に一般的なラミネート型の素電池の構成では、質
量が約100ｇ程度に対し、タブ４ｂ部は、アルミ、もし
くはニッケル等の箔であり、数100μmの厚みしかないた
め、金属疲労が起きやすかった。しかしながら、本実施
の形態１では、樹脂７を充填することで、ラミネート型
の電池本体４ａの振動振幅が減少し、タブ４ｂ部にかか
る応力が減少するものである。Here, in the case of the laminated type unit cell 4 used in the first embodiment, the tab 4b portion is particularly weak in strength, so that metal fatigue is likely to occur due to external vibration. Particularly in the case of a general laminate type unit cell structure, the tab 4b is a foil such as aluminum or nickel and has a thickness of only several hundreds of μm, and metal fatigue is apt to occur, while the weight is about 100 g. . However, in the first embodiment, by filling the resin 7, the vibration amplitude of the laminated battery body 4a is reduced, and the stress applied to the tab 4b portion is reduced.
【００２２】複数の素電池４を連結するバスバー５に関
して説明すると、タブ４ｂとバスバー５は質量が異なる
ため同位相で振動しない。よって、タブ４ｂとバスバー
５の連結部分やタブ４ｂの根本部分で金属疲労が起きや
すかった。しかしながら、本実施の形態１では、支持体
１内に樹脂７を充填することで、バスバー５の振動振幅
が減少し、タブ４ｂとバスバー５の接合強度の低下を防
止するものである。The bus bar 5 connecting the plurality of unit cells 4 will be described. Since the tabs 4b and the bus bar 5 have different masses, they do not vibrate in the same phase. Therefore, metal fatigue is likely to occur at the connecting portion between the tab 4b and the bus bar 5 and the root portion of the tab 4b. However, in the first embodiment, the resin 7 is filled in the support 1 to reduce the vibration amplitude of the bus bar 5 and prevent the joint strength between the tab 4b and the bus bar 5 from decreasing.
【００２３】次に、樹脂７について説明する。実施の形
態１における樹脂７群は、この樹脂７群によって素電池
４が包まれていることが必要であるが、支持体１内の素
電池４以外の空間の一部分、もしくは全空間に充填され
ていても効率的に振動エネルギを低減することができ
る。また、振動の低減のためには素電池４及びバスバー
５といった振幅が大きい部位に樹脂７群を設定すること
が有効であり、組電池全体の質量を軽減することもでき
る。特に、素電池４の振動を低減するために、素電池４
の周辺部位に樹脂７を設定することも可能であり、バス
バー５部分の振動を低減するために、バスバー５の部分
のみを樹脂７で包むことも効果的である。Next, the resin 7 will be described. In the resin 7 group in the first embodiment, the unit cell 4 needs to be wrapped by the resin 7 group, but a part of the space other than the unit cell 4 in the support 1 or the entire space is filled. However, the vibration energy can be efficiently reduced. Further, in order to reduce the vibration, it is effective to set the resin 7 group in a portion having a large amplitude such as the unit cell 4 and the bus bar 5, and the mass of the entire assembled battery can be reduced. In particular, in order to reduce the vibration of the unit cell 4,
It is also possible to set the resin 7 in the peripheral portion of the above, and it is also effective to wrap only the portion of the bus bar 5 with the resin 7 in order to reduce the vibration of the portion of the bus bar 5.
【００２４】ここで、樹脂７の動的バネ定数は、素電池
４をタブ４ｂを介して支持体１に接続するマスバネ系の
動的バネ定数よりもその絶対値が小さいことが望まし
い。すなわち、タブ４ｂを介して支持体１に接続された
バスバー５をバネとし、素電池４をマスとするマスバネ
系を考えると、バスバー５を包む樹脂７の動的バネ定数
を、空気バネのような極めて小さなバネ定数ではなく、
バスバー５等のバネ定数に近づけることで、バスバー５
やタブ４ｂにかかる応力を低減することができる。これ
に対し、樹脂７の動的バネ定数の絶対値が、素電池４を
タブ４ｂを介して支持体１に支持するマスバネ系の動的
バネ定数の絶対値よりも大きいときには、応力がタブ４
ｂ部及びバスバー５にかかる可能性が高くなってしまう
からである。Here, the dynamic spring constant of the resin 7 is preferably smaller in absolute value than the dynamic spring constant of the mass spring system that connects the unit cell 4 to the support 1 via the tab 4b. That is, considering a mass spring system in which the bus bar 5 connected to the support 1 via the tab 4b is used as a spring and the unit cell 4 is used as a mass, the dynamic spring constant of the resin 7 wrapping the bus bar 5 can be calculated as an air spring. Not a very small spring constant,
By approaching the spring constant of bus bar 5 etc.,
The stress applied to the tabs 4b can be reduced. On the other hand, when the absolute value of the dynamic spring constant of the resin 7 is larger than the absolute value of the dynamic spring constant of the mass spring system that supports the unit cell 4 on the support 1 via the tab 4b, the stress is increased.
This is because the possibility of hitting the b portion and the bus bar 5 increases.
【００２５】また、一般的に振動伝達率は小さいほど防
振に対して効果が大きい。ここで、振動伝達率は、その
物体の動的バネ定数に大きく依存し、防振性能を向上さ
せるためには、動的バネ定数を低減させることが必要で
あるからであるが、特に限定しない。Further, generally, the smaller the vibration transmissibility, the greater the effect on the image stabilization. Here, the vibration transmissibility greatly depends on the dynamic spring constant of the object, and it is necessary to reduce the dynamic spring constant in order to improve the vibration isolation performance, but it is not particularly limited. .
【００２６】図６及び図７は、２以上の樹脂群を使用し
た場合の組電池のモデル図である。図６に示すように、
少なくとも２以上の樹脂群（樹脂ａ，樹脂ｅ）を使用す
る場合には、支持体１内壁と素電池４に設定する樹脂ａ
の硬度の絶対値が、各素電池４間に設定する樹脂ｅの硬
度の絶対値よりも小さいことが望ましい。すなわち、外
部から支持体１に入力される振動が素電池４に入力する
ことを極力低減するためには、複数の素電池群が支持体
１より振動的に絶縁されることが望ましいからであり、
樹脂ａの硬度の絶対値が、樹脂ｅの硬度の絶対値よりも
小さいときには、支持体１が振動しても素電池４は群で
まとまり、外部からの振動を絶縁し、素電池４に対して
振動が伝わりにくくなるからである。FIGS. 6 and 7 are model diagrams of the assembled battery when two or more resin groups are used. As shown in FIG.
When using at least two or more resin groups (resin a, resin e), the resin a set on the inner wall of the support 1 and the unit cell 4 is used.
It is desirable that the absolute value of the hardness of is smaller than the absolute value of the hardness of the resin e set between the unit cells 4. That is, in order to reduce as much as possible the vibration input from the outside to the support body 1 to the unit cell 4, it is desirable that the plurality of unit cell groups be vibrationally insulated from the support body 1. ,
When the absolute value of the hardness of the resin a is smaller than the absolute value of the hardness of the resin e, the unit cells 4 are grouped together even if the support 1 vibrates to insulate the unit 4 from external vibration. Vibration is less likely to be transmitted.
【００２７】図７に示すように、素電池４が３つ以上の
場合には、中央に位置する樹脂ｄが最も硬度の絶対値が
大きく、樹脂ｄ→樹脂ｅ→樹脂ａと支持体１に向かうに
連れて小さくすることが望ましいが、特に限定は行わな
い。また、素電池４と支持体１の間である最外部の樹脂
ａ以外の樹脂群を統一して、樹脂ａの硬度の絶対値より
も大きな硬度の絶対値を有する同じ樹脂（樹脂ｄの硬度
の絶対値＝樹脂ｅの硬度の絶対値）を用いるのが望まし
いが、特に限定は行わない。As shown in FIG. 7, when the number of the unit cells 4 is three or more, the resin d located at the center has the largest absolute value of hardness, and the resin d → resin e → resin a is transferred to the support 1. It is desirable to make it smaller as it goes, but there is no particular limitation. In addition, by unifying the resin group other than the outermost resin a between the unit cell 4 and the support 1, the same resin (hardness of the resin d) having a hardness absolute value larger than that of the resin a is unified. It is desirable to use the absolute value of = the absolute value of the hardness of the resin e), but there is no particular limitation.
【００２８】また、硬度と同様に、誘電正接も、樹脂ａ
の誘電正接の絶対値が、各素電池４間に設定する樹脂ｄ
及び樹脂ｅ等の誘電正接の絶対値よりも小さいことが望
ましい。これは、素電池４間は振動的絶縁性を確保しな
ければならないためである。また、誘電正接を損失正接
としても効果は得られるが、特に限定は行わない。Similarly to the hardness, the dielectric loss tangent also has a resin a
The absolute value of the dielectric loss tangent of the resin d set between the unit cells 4
And smaller than the absolute value of the dielectric loss tangent of the resin e and the like. This is because it is necessary to secure vibrational insulation between the unit cells 4. Further, the loss tangent can be used as the loss tangent, but the effect can be obtained, but it is not particularly limited.
【００２９】ここで、樹脂の硬度JISＡは、5〜95の範囲
にあることが望ましい。硬度JISＡが５以下になると樹
脂が柔らかいため、素電池４やタブ４ｂに連結されたバ
スバー５の自重により樹脂に沈み込んでしまう可能性が
高くなり、95以上になると振動減衰効果が小さくなるか
らである。Here, the hardness JIS A of the resin is preferably in the range of 5 to 95. If the hardness JISA is 5 or less, the resin is soft, so there is a high possibility that it will sink into the resin due to the weight of the unit cell 4 or the bus bar 5 connected to the tab 4b, and if it is 95 or more, the vibration damping effect will decrease. Is.
【００３０】また、樹脂の10〜1kHzの誘電正接は1.0×1
0-3〜5.0×10-1の範囲にあることが望ましい。組電池に
必要な防振周波数は、10〜100Hzの範囲であり、10Hz以
下の周波数領域では、組電池のサイズ的観点からも共振
周波数が存在する可能性が低い。また、1kHz以上の周波
数は、音の領域に入るため、防振の必要性も低くなる。
振動の低減効果は、損失正接に依存されるが、この損失
正接は、動的粘弾性試験によって得ることが可能であ
る。しかしながら、本試験は比較的柔らかな樹脂を正確
に測定することが困難であるため、損失正接とほぼ対応
が等しい誘電正接を用いることでその特性を予想でき
る。The dielectric loss tangent of resin at 10 to 1 kHz is 1.0 × 1.
It is preferably in the range of 0 -3 to 5.0 x 10 -1 . The vibration-proof frequency required for the battery pack is in the range of 10 to 100 Hz, and in the frequency range of 10 Hz or lower, the resonance frequency is unlikely to exist from the viewpoint of the size of the battery pack. In addition, since frequencies above 1 kHz fall within the sound range, the need for vibration isolation is reduced.
The vibration reduction effect depends on the loss tangent, which can be obtained by the dynamic viscoelasticity test. However, since it is difficult to accurately measure a relatively soft resin in this test, its characteristics can be predicted by using a dielectric loss tangent whose correspondence is almost the same as the loss tangent.
【００３１】この誘電正接は-30℃〜80℃の通常の使用
温度範囲で1.0×10-3〜5.0×10-1の範囲にあることが望
ましい。1.0×10-3以下では、樹脂が比較的柔らかく、
振動が伝わることにより、素電池の自重により沈み込ん
でしまう可能性が高くなり、5.0×10-1以上では、十分
な減衰効果が得られないからである。This dielectric loss tangent is preferably in the range of 1.0 × 10 −3 to 5.0 × 10 −1 in the normal operating temperature range of −30 ° C. to 80 ° C. Below 1.0 × 10 -3 , the resin is relatively soft,
This is because when the vibration is transmitted, there is a high possibility that the unit cell will sink due to its own weight, and at 5.0 × 10 −1 or more, a sufficient damping effect cannot be obtained.
【００３２】また、損失正接が正確に測定できる場合に
は、損失正接も1.0×10-3〜5.0×10 -1の範囲にあること
が望ましい。理由は誘電正接の場合と同様である。When the loss tangent can be accurately measured,
Also has a loss tangent of 1.0 × 10-3~ 5.0 x 10 -1Be in the range
Is desirable. The reason is the same as in the case of dielectric loss tangent.
【００３３】樹脂群を構成する樹脂は、エポキシ系樹
脂、ウレタン系樹脂、ナイロン系樹脂、オレフィン系樹
脂から、単独、もしくは複合で選ばれることが望まし
い。組電池内に充填する樹脂群は、素電池４への振動の
伝達を低減するのはもちろんのこと、素電池４を外部の
環境から守る目的も有する。例えば、防水性、防湿性、
冷熱サイクル性、耐熱安定性、絶縁性、難燃性等の性能
を有することが必要である。これらの性能を満たすため
には、数ある樹脂群の中では、エポキシ系樹脂、ウレタ
ン系樹脂、ナイロン系樹脂、オレフィン系樹脂が望まし
いからである。The resins constituting the resin group are preferably selected from epoxy resins, urethane resins, nylon resins and olefin resins, either alone or in combination. The resin group filled in the assembled battery not only reduces the transmission of vibration to the unit cell 4, but also has the purpose of protecting the unit cell 4 from the external environment. For example, waterproof, moisture proof,
It is necessary to have properties such as cold-heat cycle property, heat resistance stability, insulation property, and flame retardancy. In order to satisfy these performances, epoxy resins, urethane resins, nylon resins, and olefin resins are desirable among many resin groups.
【００３４】また、特にウレタン系樹脂は前記性能が優
れているため樹脂として用いることが望ましい。また、
これら以外のシリコンゴム、オレフィン系エラストマー
等の樹脂でも本発明の目的を達成することが可能であ
り、前述した諸性能を満足するものであれば、樹脂群と
して使用することができるため、前記樹脂群に限られる
ものではない。また、これらの樹脂を複合で用いること
も有効である。サブモジュールの種々の部位にその部位
に適した樹脂を配置することにより、より効果的な防振
を達成することができる。Further, since urethane type resin is particularly excellent in the above performance, it is desirable to use it as a resin. Also,
It is possible to achieve the object of the present invention with resins other than these, such as silicone rubber and olefin elastomers, and as long as they satisfy the above-mentioned various properties, they can be used as a resin group. It is not limited to groups. It is also effective to use a composite of these resins. By arranging a resin suitable for each part in various parts of the submodule, more effective vibration isolation can be achieved.
【００３５】また、支持体内の素電池以外の空間は、95
〜100vol％が樹脂群によって占有されていることが望ま
しい。樹脂群は、振動伝達率の低減、防水性、防湿性、
冷熱サイクル性、耐熱安定性、絶縁性、難燃性等の目的
を有するものであるから、基本的に支持体１内の空き空
間には全て樹脂が存在することが望ましい。従って、95
vol％以下では前記性能が低減するため好ましくない。
また、組電池は放熱性も良好である必要があるため、空
間に空気が存在すると放熱性が悪化する。従って可能な
限り95vol％以上が放熱性の観点から望ましい。The space other than the unit cells in the support is 95
It is desirable that ~ 100vol% be occupied by the resin group. The resin group has reduced vibration transmissibility, waterproofness, moisture resistance,
Since it has the purpose of cooling / heating cycle property, heat resistance stability, insulation property, flame retardancy, etc., it is basically desirable that all the resin is present in the empty space in the support 1. Therefore, 95
If it is less than vol%, the above-mentioned performance is reduced, which is not preferable.
Moreover, since the assembled battery needs to have good heat dissipation, the presence of air in the space deteriorates the heat dissipation. Therefore, 95 vol% or more is desirable as much as possible from the viewpoint of heat dissipation.
【００３６】また、素電池４は電極の積層方向の厚さが
1〜10mmの薄型ラミネート電池であることが望ましい。
組電池は小単位の素電池４を効率よく集合させて、大容
量、高電圧の電池とする手段であり、樹脂群に包まれる
のに効率の良い素電池４は、外部が樹脂より構成されて
いるラミネート型電池とすることで、従来技術で説明し
た缶の電池に比べ外壁がナイロン等の高分子フィルムで
あるため、素電池４の動的バネ定数が低く、振動低減効
率が高いからである。また同じ樹脂の環境になるため、
素材的になじみやすく、振動劣化により素電池４と樹脂
群の界面において剥離が起きにくいからである。また、
放熱性の観点からラミネート電池の厚さは1mm以上10mm
以下が望ましい。The unit cell 4 has a thickness in the electrode stacking direction.
A thin laminated battery of 1 to 10 mm is desirable.
The assembled battery is a means for efficiently assembling small unit cells 4 into a large-capacity, high-voltage battery. The unit cells 4 that are efficient to be wrapped in a resin group are made of resin on the outside. By using a laminated battery, the outer wall is a polymer film such as nylon as compared to the can battery described in the prior art, so the dynamic spring constant of the unit cell 4 is low and the vibration reduction efficiency is high. is there. Also, because it is the same resin environment,
This is because the material is easy to fit in and the peeling hardly occurs at the interface between the unit cell 4 and the resin group due to vibration deterioration. Also,
From the viewpoint of heat dissipation, the thickness of the laminated battery is 1 mm or more and 10 mm
The following is desirable.
【００３７】以上のことから、素電池４は1mm〜10mmの
薄型ラミネート電池が好ましく、振動低減効果のみなら
ず、放熱性等の性能も高くなり、種々の劣化も低減され
るという効果を有する。From the above, the unit cell 4 is preferably a thin laminated battery of 1 mm to 10 mm, and has not only the effect of reducing vibration but also the effect of improving performance such as heat dissipation and various deteriorations.
【００３８】（実施の形態２）図８は実施の形態２の組
電池を表す上面図、端面図及びＡ−Ａ断面図である。基
本的な構成は実施の形態１と同様であるため、異なる部
分のみ説明する。８はラミネートパックされた素電池で
あり、図９の素電池８の上面図及び側面図に示すよう
に、ラミネート外装されたシート型の電池本体８ａと、
電池本体８ａの一端に設けられ正極及び負極となる２つ
のタブ８ｂから構成されている。また、図１０の組電池
の概略斜視図に示すように、各素電池８を２並列に接続
した素電池群１１をバスバー５によりタブ８ｂを接続す
ることで１２直列に接続し、４×６列となるように支持
体１内に樹脂７とともに収装する。各素電池４の隙間は
樹脂７が充填され、電池外部からの加振によって素電池
８やタブ８ｂ及びバスバー５等に十分に振動が伝わりに
くいよう構成されている。尚、防振構造については、実
施の形態１で説明したものと同じであるため省略する。(Embodiment 2) FIG. 8 is a top view, an end view and an AA sectional view showing an assembled battery according to a second embodiment. Since the basic configuration is the same as that of the first embodiment, only different parts will be described. Reference numeral 8 denotes a laminated-packed unit cell, and as shown in the top view and side view of the unit cell 8 in FIG.
It is composed of two tabs 8b provided at one end of the battery body 8a and serving as a positive electrode and a negative electrode. In addition, as shown in the schematic perspective view of the assembled battery of FIG. 10, the unit cell group 11 in which each unit cell 8 is connected in two parallel is connected in 12 series by connecting the tab 8b by the bus bar 5, and 4 × 6 is obtained. The resin 7 is housed in the support 1 so as to form a row. The gap between the unit cells 4 is filled with a resin 7 so that vibration is not sufficiently transmitted to the unit cells 8, the tabs 8b, the bus bar 5 and the like due to vibration from the outside of the cells. Since the vibration isolation structure is the same as that described in the first embodiment, its description is omitted.
【００３９】（実施例）以下、本発明を実施例に基づい
て更に詳細に説明するが、本発明はこれによって限定さ
れるものではない。尚、各実施例の仕様及び評価結果を
表１に示し、用いた樹脂の仕様を表２に示す。(Examples) The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited thereto. The specifications and evaluation results of each example are shown in Table 1, and the specifications of the resin used are shown in Table 2.
【００４０】（実施例１）図１１は実施例１における組
電池を表す図である。金属製の支持体に図２に示すラミ
ネート外装の素電池（表中形状１と記載）を２並列で設
置し、樹脂ａを支持体内に流し込み常温で固化させた。
このとき厚さ方向、タブ方向とも適切な空間を設けて素
電池を設置し、全ての空間に樹脂ａを流し込むことによ
って、組電池を作製した。樹脂ａのスペックは表２にあ
る通りである。また、組電池の素電池の質量をマスと
し、樹脂ａの厚さ方向のマスバネ系でタブ部の動的バネ
定数と樹脂ａの動的バネ定数の比を60％とした。ここ
で、素電池には、正極活物質にマンガン酸リチウム、負
極活物質にカーボンを用いたリチウムイオン二次電池を
用いたが、これに限定されるものではない。(Embodiment 1) FIG. 11 is a diagram showing an assembled battery in Embodiment 1. Two laminated outer unit cells (described as shape 1 in the table) shown in FIG. 2 were installed in parallel on a metal support, and a resin a was poured into the support and solidified at room temperature.
At this time, a unit cell was installed by providing appropriate spaces in both the thickness direction and the tab direction, and the resin a was poured into all the spaces to manufacture an assembled battery. The specifications of the resin a are as shown in Table 2. Further, the mass of the unit cell of the assembled battery was used as a mass, and the ratio of the dynamic spring constant of the tab portion to the dynamic spring constant of the resin a was set to 60% in the mass spring system in the thickness direction of the resin a. Here, as the unit cell, a lithium ion secondary battery using lithium manganate as the positive electrode active material and carbon as the negative electrode active material was used, but it is not limited to this.
【００４１】（実施例２）樹脂を樹脂ｂとし、動的バネ
定数比を80％とした以外は実施例１と全く同様にして組
電池を作製した。Example 2 An assembled battery was manufactured in exactly the same manner as in Example 1 except that the resin was resin b and the dynamic spring constant ratio was 80%.
【００４２】（実施例３）樹脂を樹脂ｃとし、動的バネ
定数比を70％とした以外は実施例１と全く同様にして組
電池を作製した。Example 3 An assembled battery was manufactured in exactly the same manner as in Example 1 except that the resin was resin c and the dynamic spring constant ratio was 70%.
【００４３】（実施例４）樹脂を樹脂ｄとし、動的バネ
定数比を95％とした以外は実施例１と全く同様にして組
電池を作製した。Example 4 An assembled battery was manufactured in exactly the same manner as in Example 1 except that the resin was resin d and the dynamic spring constant ratio was 95%.
【００４４】（実施例５）樹脂を樹脂ｅとし、動的バネ
定数比を80％とした以外は実施例１と全く同様にして組
電池を作製した。Example 5 An assembled battery was manufactured in exactly the same manner as in Example 1 except that the resin was resin e and the dynamic spring constant ratio was 80%.
【００４５】（実施例６）樹脂を樹脂ｆとし、動的バネ
定数比を85％とした以外は実施例１と全く同様にして組
電池を作製した。Example 6 An assembled battery was manufactured in exactly the same manner as in Example 1 except that the resin was resin f and the dynamic spring constant ratio was 85%.
【００４６】（実施例７）支持体との空間の95％に樹脂
ａを注入した以外は、実施例１と全く同様にして組み電
池を作製した。Example 7 An assembled battery was manufactured in exactly the same manner as in Example 1 except that the resin a was injected into 95% of the space between the support and the support.
【００４７】（実施例８）図１に示す実施の形態１に示
す組電池の構成であって、全ての空間に樹脂ａを流し込
むことによって組電池を作製した。また、組電池の素電
池の質量をマスとし、樹脂ａの厚さ方向のマスバネ系で
タブ部の動的バネ定数と樹脂ａの動的バネ定数の比を、
それぞれ素電池の平均で60％とした。(Example 8) In the structure of the assembled battery shown in FIG. 1 according to the first embodiment, the assembled battery was produced by pouring the resin a into all the spaces. In addition, the mass of the unit cell of the assembled battery is taken as a mass, and the ratio of the dynamic spring constant of the tab portion to the dynamic spring constant of the resin a in the mass spring system in the thickness direction of the resin a is
The average of each unit cell was set to 60%.
【００４８】（実施例９）図８に示す実施の形態２に示
す組電池の構成であって、図９に示すラミネート外装の
素電池８（表中形状２と記載）を２並列で設置し、全て
の空間に樹脂ａを流し込むことによって組電池を作製し
た。それ以外は実施例８と全く同様に組み電池を作製し
た。(Example 9) In the structure of the assembled battery shown in FIG. 8 according to the second embodiment, two unit cells 8 (shown as shape 2 in the table) having a laminated exterior shown in FIG. 9 are installed in parallel. A battery pack was prepared by pouring resin a into all the spaces. An assembled battery was produced in exactly the same manner as in Example 8 except for the above.
【００４９】（実施例１０）図６に示す組電池であっ
て、金属製の支持体に図２に示すラミネート外装の素電
池４（表中形状１と記載）を２並列で設置し、支持体と
素電池ｂとの間の空間に樹脂ａを流し込み固化させ、続
いて素電池ｂと素電池ａの間の空間に樹脂ｅを流し込み
固化させた後、更に上部の支持体と素電池ａの間の空間
に樹脂ａを流し込み常温で固化させた。このとき厚さ方
向、タブ方向とも適切な空間を設けて素電池を設置し、
全ての空間に樹脂ａ及び樹脂ｅを流し込むことによっ
て、組電池を作製した。樹脂ａ及び樹脂ｅのスペックは
表２にある通りである。また、組電池の素電池の質量を
マスとし、樹脂ａの厚さ方向のマスバネ系でタブ部の動
的バネ定数と樹脂ａの動的バネ定数の比を60％、樹脂ｅ
の動的バネ定数を80％とした。(Example 10) In the assembled battery shown in Fig. 6, two unit cells 4 (shown as shape 1 in the table) having a laminated outer package shown in Fig. 2 are installed in parallel on a metal support. After the resin a is poured into the space between the body and the unit cell b to be solidified, and subsequently the resin e is poured into the space between the unit cell b and the unit cell a to be solidified, further, the upper support and the unit cell a. Resin a was poured into the space between them to solidify at room temperature. At this time, install the unit cells by providing appropriate spaces in the thickness direction and the tab direction,
A battery pack was produced by pouring resin a and resin e into all the spaces. The specifications of the resin a and the resin e are as shown in Table 2. The mass of the unit cell of the assembled battery is taken as the mass, and the ratio of the dynamic spring constant of the tab portion to the dynamic spring constant of the resin a is 60% in the mass spring system in the thickness direction of the resin a, and the resin e
The dynamic spring constant of was set to 80%.
【００５０】（実施例１１）図７に示す組電池であっ
て、金属製の支持体に図２に示すラミネート外装の素電
池４（表中形状１と記載）を２並列で設置し、支持体と
素電池ｄとの間の空間に樹脂ａを流し込み固化させ、続
いて素電池ｄと素電池ｃの間の空間に樹脂ｅを流し込み
固化させ、続いて素電池ｅと素電池ｂの間の空間に樹脂
ｄを流し込み固化させ、続いて素電池ｂと素電池ａの間
の空間に樹脂ｅを流し込み固化させた後、更に上部の支
持体と素電池ａの間の空間に樹脂ａを流し込み常温で固
化させた。このとき厚さ方向、タブ方向とも適切な空間
を設けて素電池を設置し、全ての空間に樹脂ａ，樹脂ｄ
及び樹脂ｅを流し込むことによって、組電池を作製し
た。樹脂ａ，樹脂ｄ及び樹脂ｅのスペックは表２にある
通りである。また、組電池の素電池の質量をマスとし、
樹脂ａの厚さ方向のマスバネ系でタブ部の動的バネ定数
と樹脂ａの動的バネ定数の比を60％、樹脂ｄの動的バネ
定数の比を80％、樹脂ｅの動的バネ定数を90％とした。(Embodiment 11) In the assembled battery shown in FIG. 7, two unit batteries 4 (shown as shape 1 in the table) having a laminated exterior shown in FIG. 2 are installed in parallel on a metal support. The resin a is poured into the space between the body and the unit cell d to be solidified, and the resin e is poured into the space between the unit cell d and the unit cell c to be solidified, followed by the unit cell e and the unit cell b. The resin d is poured into the space of the unit cell and solidified, and subsequently the resin e is poured into the space between the unit cell b and the unit cell a to be solidified, and the resin a is further placed in the space between the upper support and the unit cell a. It was poured and solidified at room temperature. At this time, the unit cells are installed by providing appropriate spaces both in the thickness direction and the tab direction, and the resin a and the resin d are provided in all the spaces.
A battery pack was produced by pouring resin and resin e. The specifications of the resin a, the resin d, and the resin e are as shown in Table 2. In addition, the mass of the unit cell of the assembled battery is taken as the mass,
In the mass spring system in the thickness direction of the resin a, the ratio of the dynamic spring constant of the tab portion to the dynamic spring constant of the resin a is 60%, the ratio of the dynamic spring constant of the resin d is 80%, and the dynamic spring of the resin e is The constant was 90%.
【００５１】（比較例１）樹脂をケース内に全く入れな
いで実施例１と全く同様の組電池を作製した。(Comparative Example 1) An assembled battery was manufactured in exactly the same manner as in Example 1 except that no resin was put in the case.
【００５２】（試験例）上記実施例１〜１１、及び比較
例１で得られた組電池について以下の実験を実施した。(Test Example) The following tests were carried out on the assembled batteries obtained in Examples 1 to 11 and Comparative Example 1.
【００５３】（動的バネ定数の測定）上記各実施例、及
び比較例の方法によって得られた組電池の上部の素電池
面中央位置に加速度ピックアップを設定し（樹脂はピッ
クアップのスペース分を確保し、樹脂被覆を剥がした）
を強制加振し、ピックアップにより得られた曲線をカー
ブフィッティング法により収束計算し、動的バネ定数の
数値を算出した。ここで、動的バネ定数比は、樹脂を入
れないで加振して得られた数値を基準にした比率であ
る。(Measurement of Dynamic Spring Constant) An acceleration pickup is set at the center position of the cell surface on the upper part of the assembled battery obtained by the method of each of the above examples and comparative example (the resin secures a space for the pickup). And peeled off the resin coating)
Was forcedly excited, and the curve obtained by the pickup was converged by the curve fitting method to calculate the numerical value of the dynamic spring constant. Here, the dynamic spring constant ratio is a ratio based on a numerical value obtained by vibrating without resin.
【００５４】（加速度比の測定）動的バネ定数測定で設
定した位置に加速度ピックアップを設定し、10Hz，50H
z，100Hzで強制加振したときに得られたピックアップの
加速度値を、樹脂無しのときに同条件で得られた加速度
値を基準にして比率を算出した。従って、加速度比＝1.
0のときは、樹脂有りと樹脂無しの加速度の絶対値が同
じことを意味し、加速度値0.0〜1.0までの値が振動低減
されたことになり、1.0以上のときは反共振で逆に加速
度が上昇し、振動が増強されたことを意味する。(Measurement of acceleration ratio) The acceleration pickup is set at the position set by the dynamic spring constant measurement, and 10Hz, 50H
The ratio was calculated based on the acceleration value of the pickup obtained when forced vibration was applied at z, 100 Hz, based on the acceleration value obtained under the same conditions without resin. Therefore, acceleration ratio = 1.
When it is 0, it means that the absolute value of the acceleration with and without resin is the same, which means that the value of the acceleration value from 0.0 to 1.0 has been reduced by vibration. Means that the vibration is increased and the vibration is increased.
【００５５】（平均低減率の測定）加速度比を10〜300H
zで測定し、その低減量を平均したもので数値が大きい
ほど、振動が低減されたことを意味する。(Measurement of average reduction rate) Acceleration ratio is 10 to 300H
It is measured by z and the reduction amount is averaged, and the larger the value, the more the vibration is reduced.
【００５６】（硬度の測定）JIS K6301の硬度測定方法
に基づいて測定を行った。(Measurement of Hardness) The hardness was measured according to JIS K6301.
【００５７】（誘電正接の測定）JIS K6911の誘電率測
定方法に基づいて測定を行った。(Measurement of Dielectric Loss Tangent) The measurement was performed based on the dielectric constant measuring method of JIS K6911.
【００５８】これらの試験結果を表１に示す。The results of these tests are shown in Table 1.
【表１】 実施例で使用した樹脂の特性値を表２に示す。[Table 1] The characteristic values of the resins used in the examples are shown in Table 2.
【表２】 [Table 2]
【図１】実施の形態１の組電池構造体を表す概略図であ
る。FIG. 1 is a schematic diagram showing an assembled battery structure according to a first embodiment.
【図２】実施の形態１の素電池を表す上面図及び側面図
である。2A and 2B are a top view and a side view showing the unit cell of the first embodiment.
【図３】実施の形態１の組電池構造体を表す概略斜視図
である。FIG. 3 is a schematic perspective view showing an assembled battery structure according to the first embodiment.
【図４】素電池の１つを、タブによって支持体に支持し
た場合の１自由度のマスバネモデルである。FIG. 4 is a 1-degree-of-freedom mass spring model in which one of the unit cells is supported by a support by a tab.
【図５】素電池の１つを、タブ及び充填された樹脂によ
って支持体に支持した場合の１自由度のマスバネモデル
である。FIG. 5 is a one degree-of-freedom mass spring model in which one of the unit cells is supported by a support by a tab and a filled resin.
【図６】２つの素電池を２以上の樹脂群により被覆した
場合の組電池のモデル図である。FIG. 6 is a model diagram of an assembled battery when two unit cells are covered with two or more resin groups.
【図７】４つの素電池を２以上の樹脂群により被覆した
場合の組電池のモデル図である。FIG. 7 is a model diagram of an assembled battery in which four unit cells are covered with two or more resin groups.
【図８】実施の形態２の組電池構造体を表す概略図であ
る。FIG. 8 is a schematic diagram showing an assembled battery structure according to a second embodiment.
【図９】実施の形態２の素電池を表す上面図及び側面図
である。9A and 9B are a top view and a side view showing a unit cell according to a second embodiment.
【図１０】実施の形態２の組電池構造体を表す概略斜視
図である。FIG. 10 is a schematic perspective view showing an assembled battery structure according to a second embodiment.
【図１１】実施例１〜７の組電池構造体を表す概略図で
ある。FIG. 11 is a schematic diagram showing an assembled battery structure of Examples 1 to 7.
【図１２】実施例９の組電池構造体を表す概略図であ
る。FIG. 12 is a schematic diagram showing an assembled battery structure of Example 9.
【図１３】従来技術の組電池構造体を表す概略斜視図で
ある。FIG. 13 is a schematic perspective view showing a battery pack structure of the related art.
１ 支持体 ２ コントローラ ３ 外部端子 ４ 素電池 ４ａ 電池本体 ４ｂ タブ ５ バスバー ６ 接続リード ７ 樹脂 ８ 素電池 ８ａ 電池本体 ８ｂ タブ １０ 素電池群 １１ 素電池群 1 support 2 controller 3 external terminals 4 cells 4a Battery body 4b tab 5 busbars 6 connection lead 7 resin 8 cells 8a Battery body 8b tab 10 unit cell group 11 unit cell group
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大澤 康彦 神奈川県横浜市神奈川区宝町２番地 日産 自動車株式会社内 (72)発明者 渡辺 恭一 神奈川県横浜市神奈川区宝町２番地 日産 自動車株式会社内 (72)発明者 堀江 英明 神奈川県横浜市神奈川区宝町２番地 日産 自動車株式会社内 (72)発明者 菅原 浩 神奈川県横浜市神奈川区宝町２番地 日産 自動車株式会社内 Ｆターム(参考） 5H040 AS07 AT04 AY06 CC28 CC30 CC33 LL06 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Yasuhiko Osawa Nissan, Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Inside the automobile corporation (72) Inventor Kyoichi Watanabe Nissan, Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Inside the automobile corporation (72) Inventor Hideaki Horie Nissan, Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Inside the automobile corporation (72) Inventor Hiroshi Sugawara Nissan, Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Inside the automobile corporation F-term (reference) 5H040 AS07 AT04 AY06 CC28 CC30 CC33 LL06
Claims (10)
設置した組電池において、 前記素電池をラミネート外装した薄型ラミネート電池と
し、 前記素電池を少なくとも１以上の樹脂群によって被覆し
たことを特徴とする組電池。1. An assembled battery in which at least two or more unit cells are installed in a support body, wherein the unit cells are laminated outer packaging, and the unit cells are covered with at least one or more resin groups. Batteries to do.
電池がタブを介して支持体に接続したマスバネ系の動的
バネ定数の絶対値よりも小さい樹脂群としたことを特徴
とする組電池。2. The assembled battery according to claim 1, wherein the resin group is a mass spring system dynamic spring in which the absolute value of the dynamic spring constant of the resin is such that the unit cell is connected to a support through a tab. An assembled battery characterized in that the resin group is smaller than the absolute value of the constant.
て、 少なくとも２以上の樹脂群を設置し、該樹脂群は、前記
支持体内壁と前記素電池の間に設定する樹脂の硬度の絶
対値が、各素電池間に設定する樹脂の硬度の絶対値より
も小さい樹脂群としたことを特徴とする組電池。3. The assembled battery according to claim 1, wherein at least two or more resin groups are installed, and the resin groups have an absolute resin hardness set between the inner wall of the support and the unit cell. An assembled battery in which the value is a resin group that is smaller than the absolute value of the hardness of the resin set between the unit cells.
する樹脂の誘電正接の絶対値が、各素電池間に設定する
樹脂の誘電正接の絶対値よりも小さい樹脂群としたこと
を特徴とする組電池。4. The assembled battery according to claim 3, wherein in the resin group, the absolute value of the dielectric loss tangent of the resin set between the inner wall of the support and the unit cells is set between the unit cells. The assembled battery is characterized in that the resin group is smaller than the absolute value of the dielectric loss tangent.
組電池において、 前記樹脂群を、樹脂の硬度JISＡが５〜９５の範囲にあ
る樹脂群としたことを特徴とする組電池。5. The assembled battery according to any one of claims 1 to 4, wherein the resin group is a resin group having a resin hardness JIS A in a range of 5 to 95.
組電池において、 前記樹脂群を、樹脂の10〜1kHzの誘電正接が、-30〜80
℃の温度範囲で、1.0×10-3〜5.0×10-1の範囲にある樹
脂群としたことを特徴とする組電池。6. The assembled battery according to claim 1, wherein the resin group has a dielectric loss tangent of 10 to 1 kHz of -30 to 80.
An assembled battery characterized by being a resin group in the range of 1.0 × 10 -3 to 5.0 × 10 -1 in a temperature range of ℃.
組電池において、 前記樹脂群を、エポキシ系樹脂、ウレタン系樹脂、ナイ
ロン系樹脂、及びオレフィン系樹脂からなる群より、単
独、もしくは複合で選ばれた樹脂群としたことを特徴と
する組電池。7. The assembled battery according to claim 1, wherein the resin group is selected from the group consisting of epoxy resins, urethane resins, nylon resins, and olefin resins, or An assembled battery characterized by being a composite selected resin group.
組電池において、 前記支持体内の空間であって、前記素電池以外の空間の
95〜100vol％を樹脂群により占有することを特徴とする
組電池。8. The assembled battery according to claim 1, wherein the space inside the support body is a space other than the unit cell.
An assembled battery characterized by occupying 95 to 100 vol% by a resin group.
組電池において、 前記素電池を、正極活物質にマンガン酸リチウム、負極
活物質にカーボンを用いたリチウムイオン二次電池とし
たことを特徴とする組電池。9. The assembled battery according to claim 1, wherein the unit cell is a lithium ion secondary battery using lithium manganate as a positive electrode active material and carbon as a negative electrode active material. Battery pack characterized by.
の組電池において、 前記素電池を、集電体の一方の面に正極が形成され、他
方の面に負極が形成されたバイポーラ電極を、固体高分
子電解質を挟んで複数枚直列に積層したバイポーラリチ
ウムイオン二次電池としたことを特徴とする組電池。10. The assembled battery according to claim 1, wherein the unit cell is a bipolar electrode in which a positive electrode is formed on one surface of a current collector and a negative electrode is formed on the other surface. Is a bipolar lithium-ion secondary battery in which a plurality of sheets are stacked in series with a solid polymer electrolyte sandwiched therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002165131A JP3575476B2 (en) | 2001-09-17 | 2002-06-06 | Battery pack |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001-281217 | 2001-09-17 | ||
| JP2001281217 | 2001-09-17 | ||
| JP2002165131A JP3575476B2 (en) | 2001-09-17 | 2002-06-06 | Battery pack |
Publications (2)
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| JP2003162989A true JP2003162989A (en) | 2003-06-06 |
| JP3575476B2 JP3575476B2 (en) | 2004-10-13 |
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| JP2006164782A (en) * | 2004-12-08 | 2006-06-22 | Nissan Motor Co Ltd | Bipolar battery, battery pack, composite battery, and vehicle mounting them |
| JP2008166169A (en) * | 2006-12-28 | 2008-07-17 | Toyota Motor Corp | Power storage device |
| WO2009031470A1 (en) * | 2007-09-06 | 2009-03-12 | Meidensha Corporation | Electric double-layer capacitor |
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| JP2005340016A (en) * | 2004-05-27 | 2005-12-08 | Nec Lamilion Energy Ltd | Electric device module with film envelope, and battery pack system |
| JP2006164782A (en) * | 2004-12-08 | 2006-06-22 | Nissan Motor Co Ltd | Bipolar battery, battery pack, composite battery, and vehicle mounting them |
| JP4635589B2 (en) * | 2004-12-08 | 2011-02-23 | 日産自動車株式会社 | Bipolar battery, assembled battery, composite battery and vehicle equipped with these |
| JP2008166169A (en) * | 2006-12-28 | 2008-07-17 | Toyota Motor Corp | Power storage device |
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| US8254085B2 (en) | 2007-09-07 | 2012-08-28 | Meidensha Corporation | Stacked electric double layer capacitor |
| US8218288B2 (en) | 2007-09-14 | 2012-07-10 | Meidensha Corporation | Bipolar layered type electric double layer capacitor |
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| US9070516B2 (en) | 2010-11-08 | 2015-06-30 | Kawasaki Jukogyo Kabushiki Kaisha | Electric double-layer capacitor |
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| JP2012204040A (en) * | 2011-03-24 | 2012-10-22 | Kayaba Ind Co Ltd | Electrical storage device |
| JP2014049427A (en) * | 2012-09-04 | 2014-03-17 | Toshiba Corp | Battery pack |
| JP2016095960A (en) * | 2014-11-13 | 2016-05-26 | 本田技研工業株式会社 | Electric vehicle |
| JP2019507472A (en) * | 2016-09-29 | 2019-03-14 | エルジー・ケム・リミテッド | battery pack |
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| JP7473383B2 (en) | 2020-04-20 | 2024-04-23 | 日本特殊陶業株式会社 | battery |
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