JP2003229107A - Battery pack - Google Patents
Battery packInfo
- Publication number
- JP2003229107A JP2003229107A JP2002024805A JP2002024805A JP2003229107A JP 2003229107 A JP2003229107 A JP 2003229107A JP 2002024805 A JP2002024805 A JP 2002024805A JP 2002024805 A JP2002024805 A JP 2002024805A JP 2003229107 A JP2003229107 A JP 2003229107A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- batteries
- end faces
- connection body
- assembled battery
- 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.)
- Pending
Links
- 230000005489 elastic deformation Effects 0.000 claims abstract 2
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- 238000003466 welding Methods 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 description 33
- 238000007789 sealing Methods 0.000 description 21
- 238000009826 distribution Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000006262 metallic foam Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は複数の電池を直線状
に連結している組電池に関する。TECHNICAL FIELD The present invention relates to an assembled battery in which a plurality of batteries are linearly connected.
【０００２】[0002]
【従来の技術】二次電池を直線状に連結している組電池
は、主としてハイブリッドカーなどの電動車両に使用さ
れる。この構造の組電池は、低抵抗な状態でしっかりと
二次電池を連結することが大切である。大きな接続抵抗
は、組電池の出力を低下させるばかりでなく、ジュール
熱が発生して発熱し、さらに抵抗ロスにより電力を有効
利用できなくなるからである。二次電池を直線状に連結
する組電池として、接続体を使用する構造が特開平１０
−１０６５３３号公報に記載される。この公報の組電池
と接続体を図１と図２に示す。この組電池は、接続体９
０に金属キャップを使用する。金属キャップは、図２に
示すように、平面部９３の外周に円筒部９４を連結した
形状に金属板をプレス成形したものである。この金属キ
ャップは、図１の断面図に示すように、一方の二次電池
１０の封口板１２に平面部９３をスポット溶接して、他
方の二次電池１０の円筒外装缶１１の円周面に円筒部９
４をスポット溶接してふたつの二次電池１０を直線状に
連結する。2. Description of the Related Art A battery pack in which secondary batteries are linearly connected is mainly used in electric vehicles such as hybrid cars. It is important for the assembled battery of this structure to securely connect the secondary batteries in a low resistance state. This is because a large connection resistance not only lowers the output of the assembled battery, but also generates Joule heat to generate heat, and resistance loss makes it impossible to effectively use electric power. A structure using a connecting body as an assembled battery for linearly connecting secondary batteries is disclosed in Japanese Patent Application Laid-Open No. HEI10-104.
-106533. The assembled battery and the connection body of this publication are shown in FIGS. 1 and 2. This assembled battery is a connection body 9
Use a metal cap for 0. As shown in FIG. 2, the metal cap is formed by press-molding a metal plate into a shape in which a cylindrical portion 94 is connected to the outer periphery of a flat portion 93. As shown in the cross-sectional view of FIG. 1, this metal cap is formed by spot welding the flat surface portion 93 to the sealing plate 12 of one of the secondary batteries 10 and the circumferential surface of the cylindrical outer can 11 of the other secondary battery 10. Cylindrical part 9
4 is spot-welded to connect the two secondary batteries 10 linearly.
【０００３】[0003]
【発明が解決しようとする課題】以上の図に示す直線状
の組電池は、複数本をケースに入れて電源装置として使
用される。電源装置は、ハイブリッドカー等に搭載され
て使用される。このとき、組電池を充放電させると電池
が発熱して温度が上昇する。複数の電池を直線状に直列
接続している組電池は、全ての電池温度を同じようには
できない。組電池は、たとえば、６本の電池を直列に接
続した場合、図３のグラフに示すように中央部分の電池
温度が高くなり、両端部分の電池温度が低くなる。電池
の温度上昇は、電池を劣化させる原因となる。このた
め、中央部分の電池の温度が高くなると、この部分の電
池が劣化しやすくなる。組電池は複数の電池を直列に接
着しているので、いずれかの電池が劣化すると、組電池
全体の電気特性が著しく低下して使用できなくなる。劣
化した電池の内部インピーダンスが高くなって、組電池
の出力電流を著しく減少させるからである。さらに困っ
たことに、複数の電池を直列に接着している組電池は、
いずれかの電池が劣化すると、この電池の劣化が加速さ
れて急激に電池特性は低下する。それは、劣化した電池
は充電できる最大容量が小さくなるので、直列に接続し
て、劣化していない他の電池と同じ充電電流と放電電流
で充放電されると、過充電または過放電され、あるいは
深く充放電されるからである。このことから、組電池全
体の寿命を長くして、各々の電池特性を低下させないた
めには、全ての電池温度を均一にすることが特に大切で
ある。The linear battery pack shown in the above figures is used as a power supply device by putting a plurality of batteries in a case. The power supply device is used by being mounted on a hybrid car or the like. At this time, when the assembled battery is charged and discharged, the battery generates heat and the temperature rises. An assembled battery in which a plurality of batteries are linearly connected in series cannot have the same battery temperature. In the assembled battery, for example, when six batteries are connected in series, the battery temperature at the central portion becomes high and the battery temperatures at both end portions become low as shown in the graph of FIG. A rise in battery temperature causes deterioration of the battery. Therefore, when the temperature of the battery in the central portion becomes high, the battery in this portion is likely to deteriorate. Since a plurality of batteries are adhered in series in the assembled battery, if any one of the batteries deteriorates, the electrical characteristics of the entire assembled battery are significantly deteriorated and the battery cannot be used. This is because the deteriorated battery has a high internal impedance and the output current of the battery pack is significantly reduced. To make matters worse, the battery pack that glues multiple batteries in series
When any one of the batteries deteriorates, the deterioration of the battery is accelerated and the battery characteristics suddenly deteriorate. It is because a deteriorated battery has a smaller maximum chargeable capacity, so if it is connected in series and charged and discharged with the same charging and discharging currents as other batteries that are not deteriorated, it will be overcharged or overdischarged, or This is because it is deeply charged and discharged. From this, it is particularly important to make all the battery temperatures uniform in order to prolong the life of the entire assembled battery and prevent the respective battery characteristics from being deteriorated.
【０００４】本発明は、極めて簡単な構造で、従来の組
電池の欠点を解決することを目的に開発されたものであ
る。本発明の重要な目的は、電池の間に緩衝部品を挟着
するという簡単な構造で、直列に接続している隣接電池
の温度差を少なくし、直線状に連結している複数の電池
温度を均一化すると共に、直列に接続している電気抵抗
をも小さくできる組電池を提供することにある。The present invention has an extremely simple structure and was developed with the object of solving the drawbacks of the conventional battery pack. An important object of the present invention is to reduce the temperature difference between adjacent batteries connected in series with a simple structure in which a buffer component is sandwiched between the batteries, and to improve the temperature of a plurality of batteries connected in a straight line. It is an object of the present invention to provide an assembled battery which can make the electric resistances connected in series small while making the battery uniform.
【０００５】[0005]
【課題を解決するための手段】本発明の組電池は、対向
して配設している電池端面を、直接あるいは接続体２０
を介して互いに溶接して、複数の電池１０を直線状に連
結している。組電池は、直線状に連結している電池１０
の電池端面の間に隙間５４を設け、この隙間５４に、導
電性と熱伝導性があって弾性変形できる緩衝部品５５を
弾性的に圧縮される状態で配設している。この緩衝部品
５５は、対向する面をそれ自体の復元力で電池端面に押
圧している。さらに、この緩衝部品５５は、対向して配
設している電池端面を電気的に接続すると共に、対向し
て配設している電池端面に熱伝導する状態で接触してい
る。In the assembled battery of the present invention, the end faces of the batteries, which are arranged so as to face each other, can be connected directly or to the connecting member 20.
The plurality of batteries 10 are linearly connected to each other by welding them to each other. The assembled battery is a battery 10 that is linearly connected.
A gap 54 is provided between the battery end faces, and a cushioning component 55, which has electrical conductivity and thermal conductivity and is elastically deformable, is disposed in the gap 54 in a state of being elastically compressed. The cushioning component 55 presses the opposing surface against the battery end surface by its own restoring force. Further, the shock-absorbing component 55 electrically connects the end faces of the batteries arranged opposite to each other and is in contact with the end faces of the batteries arranged opposite to each other in a heat conducting state.
【０００６】緩衝部品５５は、発泡金属、金属繊維の集
合体、スプリングワッシャ、導電ゴム、導電性のある軟
質プラスチックのいずれかとすることができる。The cushioning component 55 can be any of foam metal, metal fiber aggregate, spring washer, conductive rubber, and conductive soft plastic.
【０００７】さらに、本発明の組電池は、中心孔２１の
ある接続体２０を介して電池１０を直線状に連結すると
共に、接続体２０の中心孔２１に緩衝部品５５を配設す
ることができる。この組電池は、接続体２０で緩衝部品
５５を定位置に保持すると共に、緩衝部品５５を接続体
２０に接触させて緩衝部品５５と接続体２０を電気接続
し、かつ、緩衝部品５５から接続体２０に熱伝導できる
状態で接触させることができる。緩衝部品５５は、一方
の面を電池端面の凸部電極１３に押圧して電気接続する
と共に、他方の面を電池端面の平面電極１８に押圧して
電気接続することができる。Further, in the assembled battery of the present invention, the battery 10 is linearly connected through the connecting body 20 having the central hole 21, and the buffer component 55 is arranged in the central hole 21 of the connecting body 20. it can. This battery pack holds the cushioning component 55 in a fixed position by the connecting body 20, and makes the cushioning component 55 contact the connecting body 20 to electrically connect the cushioning component 55 and the connecting body 20, and to connect from the cushioning component 55. It can be brought into contact with the body 20 in a heat conductive state. The cushioning component 55 is capable of pressing one surface against the convex electrode 13 on the battery end surface for electrical connection and pressing the other surface against the flat electrode 18 on the battery end surface for electrical connection.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施例を図面に基
づいて説明する。ただし、以下に示す実施例は、本発明
の技術思想を具体化するための組電池を例示するもので
あって、本発明は組電池を以下のものに特定しない。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. However, the examples described below exemplify the assembled battery for embodying the technical idea of the present invention, and the present invention does not specify the assembled battery to the following.
【０００９】さらに、この明細書は、特許請求の範囲を
理解しやすいように、実施例に示される部材に対応する
番号を、「特許請求の範囲の欄」、および「課題を解決
するための手段の欄」に示される部材に付記している。
ただ、特許請求の範囲に示される部材を、実施例の部材
に特定するものでは決してない。Further, in this specification, in order to facilitate understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "the claims column" and "to solve the problems. It is added to the members shown in "Means column".
However, the members shown in the claims are not limited to the members of the embodiment.
【００１０】図４に示す組電池は、複数の二次電池１０
を直列に接続して直線状に連結している。この組電池
は、図５に示すように、対向して配設している電池端面
を接続体２０を介して互いに溶接して、複数の二次電池
１０を直線状に連結している。図の組電池は、接続体２
０を溶接して二次電池１０を直線状に連結しているが、
二次電池を直接に溶接して直線状に連結することもでき
る。二次電池を直接に溶接して連結する構造は、一方の
二次電池の外装缶の底面に、他方の二次電池の凸部電極
あるいは封口板を溶接して連結する。The assembled battery shown in FIG. 4 comprises a plurality of secondary batteries 10.
Are connected in series and connected in a straight line. As shown in FIG. 5, this assembled battery has a plurality of secondary batteries 10 connected linearly by welding the end faces of the batteries, which are arranged opposite to each other, through a connector 20. The assembled battery shown in the figure is a connection body 2
0 is welded and the secondary battery 10 is linearly connected,
It is also possible to directly weld the secondary batteries and connect them linearly. In the structure in which the secondary battery is directly welded and connected, the convex electrode or the sealing plate of the other secondary battery is welded and connected to the bottom surface of the outer can of the one secondary battery.
【００１１】組電池は、複数個を直列に接続して、主と
してハイブリッドカー等の電動車両に使用される。た
だ、本発明の組電池は、電動車両以外の用途であって、
大出力が要求される用途にも使用できる。図の組電池
は、円筒型電池である二次電池を直線状に連結して直列
に接続している。ただし、組電池は、角型電池である二
次電池を直線状に連結して直列に接続することもでき
る。二次電池１０は、ニッケル−水素電池、リチウムイ
オン二次電池、ニッケル−カドミウム電池等の充電でき
る全ての電池を使用することができる。ただ、電動車両
用の組電池に使用される二次電池には、ニッケル−水素
電池が適している。体積と重量に対する出力が大きく
て、優れた大電流特性を有するからである。A plurality of assembled batteries are connected in series and are mainly used in electric vehicles such as hybrid cars. However, the assembled battery of the present invention is used for applications other than electric vehicles,
It can also be used in applications where high output is required. In the assembled battery shown in the figure, cylindrical secondary batteries are linearly connected and connected in series. However, in the assembled battery, it is also possible to connect the secondary batteries, which are prismatic batteries, linearly and connect them in series. As the secondary battery 10, all rechargeable batteries such as a nickel-hydrogen battery, a lithium-ion secondary battery, and a nickel-cadmium battery can be used. However, the nickel-hydrogen battery is suitable for the secondary battery used in the assembled battery for the electric vehicle. This is because it has a large output with respect to volume and weight and has excellent large current characteristics.
【００１２】二次電池１０は、図５の断面図に示すよう
に、外装缶１１の開口部を封口板１２で気密に密閉して
いる。外装缶１１と封口板１２は金属板である。外装缶
１１は、金属板を底のある筒状にプレス成形して製作さ
れる。封口板１２は、中央に凸部電極１３を溶接してい
る。外装缶１１の内部には、電極（図示せず）が内蔵さ
れる。さらに、電解液も充填される。外装缶１１は、開
口部の端部をかしめ加工して封口板１２を気密に固定し
ている。封口板１２は、ガスケット１４を介して外装缶
１１のかしめ部に挟着されて気密に固定される。ガスケ
ット１４は絶縁材のゴム状弾性体で、封口板１２と外装
缶１１とを絶縁すると共に、封口板１２と外装缶１１と
の隙間を気密に閉塞する。この構造の二次電池１０は、
封口板１２をかしめて挟着するために、封口板１２を設
けている端部に、周囲に沿って溝部１５が設けられる。
さらに、封口板１２の周縁にはカシメ凸条１６が設けら
れる。この二次電池１０は、封口板１２を第１の電極と
して、外装缶１１を第２の電極としている。ニッケル−
水素電池は、第１の電極を正極として第２の電極を負極
としている。二次電池は、第１の電極を負極として第２
の電極を正極とすることもできる。In the secondary battery 10, as shown in the sectional view of FIG. 5, the opening of the outer can 11 is hermetically sealed with a sealing plate 12. The outer can 11 and the sealing plate 12 are metal plates. The outer can 11 is manufactured by pressing a metal plate into a cylindrical shape having a bottom. The sealing plate 12 has a convex electrode 13 welded to the center thereof. An electrode (not shown) is incorporated inside the outer can 11. Further, the electrolyte solution is also filled. The outer can 11 has the end of the opening portion crimped to hermetically fix the sealing plate 12. The sealing plate 12 is airtightly fixed by being sandwiched by the caulking portion of the outer can 11 via a gasket 14. The gasket 14 is a rubber-like elastic body made of an insulating material, which insulates the sealing plate 12 and the outer can 11 and hermetically closes the gap between the sealing plate 12 and the outer can 11. The secondary battery 10 having this structure is
In order to crimp and seal the sealing plate 12, a groove portion 15 is provided along the periphery at the end portion where the sealing plate 12 is provided.
Further, a caulking ridge 16 is provided on the periphery of the sealing plate 12. The secondary battery 10 uses the sealing plate 12 as a first electrode and the outer can 11 as a second electrode. Nickel-
A hydrogen battery has a first electrode as a positive electrode and a second electrode as a negative electrode. The secondary battery has a second electrode with the first electrode as a negative electrode.
The electrode of can also be used as a positive electrode.
【００１３】組電池は、直線状に連結している二次電池
１０の電池端面の間に隙間５４を設けて、この隙間５４
に緩衝部品５５を弾性的に圧縮する状態で配設してい
る。緩衝部品５５は、導電性と熱伝導性があって弾性変
形できるもので、発泡金属、金属繊維の集合体、スプリ
ングワッシャ、導電ゴム、導電性のある軟質プラスチッ
ク等である。発泡金属は、ニッケル等の金属を連続気
泡、または独立気泡を有する発泡状態に成形したもので
ある。金属繊維の集合体は、ステンレス線やアルミニウ
ム線等を立体的に方向性なく集合して成形したもの、あ
るいは金属結晶繊維であるウイスカを立体的に集合した
ものである。In the assembled battery, a gap 54 is provided between the battery end faces of the secondary batteries 10 which are linearly connected, and the gap 54 is formed.
Further, the cushioning component 55 is arranged in a state of being elastically compressed. The cushioning component 55 is electrically conductive and thermally conductive and elastically deformable, and is made of foam metal, an assembly of metal fibers, a spring washer, conductive rubber, conductive soft plastic, or the like. The metal foam is formed by molding a metal such as nickel into a foamed state having open cells or closed cells. The aggregate of metal fibers is formed by assembling stainless wires, aluminum wires and the like in a three-dimensionally non-directional manner, or is a three-dimensional assembly of whiskers which are metal crystal fibers.
【００１４】緩衝部品５５は、弾性的に圧縮される状態
で配設されるので、それ自体の復元力で対向する面を電
池端面に押圧する。この状態で電池端面に押圧される緩
衝部品５５は、対向する電池端面を電気的に接続すると
共に、対向して配設している電池端面に熱伝導する状態
で接触する。Since the cushioning component 55 is disposed in a state where it is elastically compressed, the opposing face presses the opposing face against the battery end face by its own restoring force. In this state, the cushioning component 55 pressed against the battery end face electrically connects the opposing battery end faces and contacts the opposing battery end faces in a heat conducting state.
【００１５】図５の組電池は、中心孔２１のある接続体
２０で二次電池１０を直線状に連結し、この接続体２０
の中心孔２１に緩衝部品５５を配設して、接続体２０で
緩衝部品５５を定位置に保持している。この緩衝部品５
５は、接続体２０の中心孔２１に入れることができるよ
うに、外形を中心孔２１の内形にほぼ等しくしてなる柱
状としている。この緩衝部品５５は、接続体２０の中心
孔２１の内周縁に接触する。したがって、この組電池
は、緩衝部品５５を接続体２０に電気接続すると共に、
緩衝部品５５と接続体２０とを熱伝導できる状態で接触
させる。この緩衝部品５５は、対向する電池端面に接触
して、両電池端面から熱伝導され、伝導される熱を接続
体２０に熱伝導して外部に放熱できる。In the assembled battery of FIG. 5, the secondary battery 10 is linearly connected by a connecting body 20 having a center hole 21, and the connecting body 20 is connected.
A buffer component 55 is disposed in the center hole 21 of the connector, and the connector 20 holds the buffer component 55 at a fixed position. This buffer component 5
5 has a columnar shape having an outer shape substantially equal to the inner shape of the center hole 21 so that it can be inserted into the center hole 21 of the connection body 20. The cushioning component 55 contacts the inner peripheral edge of the central hole 21 of the connection body 20. Therefore, this battery pack electrically connects the buffer component 55 to the connection body 20, and
The cushioning component 55 and the connection body 20 are brought into contact with each other in a state where heat can be conducted. The buffer component 55 contacts the opposite battery end faces and is thermally conducted from both battery end faces, and the conducted heat can be conducted to the connection body 20 and radiated to the outside.
【００１６】接続体２０の中心孔２１に配設される緩衝
部品５５は、一方の面を電池端面の凸部電極１３に押圧
して電気接続され、他方の面を電池端面の平面電極１８
に押圧して電気接続している。ただし、本発明は、緩衝
部品５５をこの位置に配設する構造に特定しない。緩衝
部品５５は、図６に示すように、接続体２０と電池端面
との間に配設することもできる。この図に示す接続体２
０は、中心孔を開口することなく、凸部電極１３を案内
する突出部２９を設けている。接続体２０は、この突出
部２９に凸部電極１３を案内する状態で封口板１２ある
いは凸部電極１３に溶接される。緩衝部品５５は、接続
体２０と突出部２９の表面と電池端面でる平面電極１８
に押圧する状態で配設されてこれらを電気接続してい
る。The buffer component 55 arranged in the center hole 21 of the connector 20 is electrically connected by pressing one surface against the convex electrode 13 on the battery end surface, and the other surface on the flat electrode 18 on the battery end surface.
Press to make an electrical connection. However, the present invention does not specify the structure in which the cushioning component 55 is arranged at this position. The cushioning component 55 can also be arranged between the connector 20 and the battery end face as shown in FIG. 6. Connection body 2 shown in this figure
No. 0 has a protrusion 29 that guides the convex electrode 13 without opening the central hole. The connecting body 20 is welded to the sealing plate 12 or the convex electrode 13 while guiding the convex electrode 13 to the projecting portion 29. The buffer component 55 is a flat electrode 18 formed by the surfaces of the connection body 20, the protruding portion 29, and the battery end surface.
They are arranged so as to be pressed against and electrically connected to each other.
【００１７】図５に示す接続体２０は、図７〜図１０に
示すように、電池端面に設けているカシメ凸条１６の内
形よりも外形を大きくしている。図５の接続体２０は、
二次電池１０の外形にほぼ等しい外形としている。二次
電池１０は、封口板１２を第１の電極、外装缶１１を第
２の電極としているので、封口板１２に接続される接続
体２０が外装缶１１の一部であるカシメ凸条１６に接触
するとショートする。この接続体２０は、カシメ凸条１
６に接触してショートするのを阻止するために、カシメ
凸条１６との間に絶縁リング４１を配設している。絶縁
リング４１は、ゴム状弾性体やプラスチック等の絶縁材
をリング状に成形したものである。図の絶縁リング４１
は、外形を二次電池１０の外形にほぼ等しくしている。
内周縁にはカシメ凸条１６の内面を被覆するリング凸条
４２を一体成形して設けている。リング凸条４２は、カ
シメ凸条１６の内側に嵌入される形状である。この絶縁
リング４１は、リング凸条４２をカシメ凸条１６の内側
に嵌入して定位置に配設される。As shown in FIGS. 7 to 10, the connector 20 shown in FIG. 5 has an outer shape larger than the inner shape of the caulking ridge 16 provided on the battery end surface. The connection body 20 of FIG.
The outer shape is substantially equal to the outer shape of the secondary battery 10. Since the secondary battery 10 uses the sealing plate 12 as the first electrode and the outer can 11 as the second electrode, the connector 20 connected to the sealing plate 12 is a caulking ridge 16 which is a part of the outer can 11. It will be shorted if it touches. This connecting body 20 is a caulking ridge 1.
An insulating ring 41 is arranged between the caulking ridge 16 and the caulking ridge 16 in order to prevent the short-circuiting due to contact with the wire 6. The insulating ring 41 is formed by molding an insulating material such as a rubber-like elastic body or plastic into a ring shape. Illustrated insulation ring 41
Has an outer shape substantially equal to the outer shape of the secondary battery 10.
A ring ridge 42 that covers the inner surface of the crimped ridge 16 is integrally formed on the inner peripheral edge. The ring ridge 42 has a shape to be fitted inside the caulking ridge 16. The insulating ring 41 is arranged at a fixed position by inserting the ring ridge 42 into the caulking ridge 16.
【００１８】この図の接続体２０は、内周部２３と外周
部２４とに段差のある形状に、金属板をプレス成形して
いる。内周部２３は封口板１２の表面に接近する位置に
配設され、外周部２４は絶縁リング４１の表面で外装缶
１１の底面に接近する位置に配設される。接続体２０
は、内周部２３と外周部２４に、各々溶接するために複
数の溶接凸部２２を設けている。内周部２３の溶接凸部
２２は、封口板１２の方向に突出して封口板１２に溶接
される。外周部２４の溶接凸部２２は、外装缶１１の底
面に向かって突出して外装缶１１の底面に溶接される。
内周部２３と外周部２４の溶接凸部２２が、対向する二
次電池１０に溶接されて、二次電池１０は直列に接続さ
れる。In the connection body 20 of this figure, a metal plate is press-molded into a shape having a step between the inner peripheral portion 23 and the outer peripheral portion 24. The inner peripheral portion 23 is arranged at a position closer to the surface of the sealing plate 12, and the outer peripheral portion 24 is arranged at a position closer to the bottom surface of the outer can 11 on the surface of the insulating ring 41. Connector 20
Is provided with a plurality of welding protrusions 22 for welding on the inner peripheral portion 23 and the outer peripheral portion 24, respectively. The welding convex portion 22 of the inner peripheral portion 23 projects toward the sealing plate 12 and is welded to the sealing plate 12. The welding protrusion 22 of the outer peripheral portion 24 projects toward the bottom surface of the outer can 11 and is welded to the bottom surface of the outer can 11.
The welding protrusions 22 of the inner peripheral portion 23 and the outer peripheral portion 24 are welded to the opposing secondary battery 10, and the secondary batteries 10 are connected in series.
【００１９】さらに、接続体２０は、図１１と図１２に
示す構造とすることもできる。この組電池は、一方の二
次電池１０の封口板１２に接続体２０の内周部２３を溶
接して、他方の二次電池１０の外装缶１１の外周面に接
続体２０の外周部２４を溶接して、ふたつの二次電池１
０を直線状に連結している。接続体２０の外周部２４
は、二次電池１０の電池端面に対向する平面部２７と、
平面部２７の外周縁から外装缶１１の外周面に沿って延
長された立上部２８とを備える。立上部２８は、外周部
２４の周縁部を、二次電池１０の外装缶１１の底部に沿
う形状に折曲加工したものである。立上部２８は、外装
缶１１の外周面に溶接するための溶着凸部２２を内面に
有する。Further, the connecting body 20 may have the structure shown in FIGS. 11 and 12. In this assembled battery, the inner peripheral portion 23 of the connector 20 is welded to the sealing plate 12 of one secondary battery 10, and the outer peripheral portion 24 of the connector 20 is attached to the outer peripheral surface of the outer can 11 of the other secondary battery 10. Weld the two secondary batteries 1
0s are connected linearly. Outer peripheral portion 24 of connecting body 20
Is a flat surface portion 27 facing the battery end surface of the secondary battery 10,
The rising portion 28 extends from the outer peripheral edge of the flat portion 27 along the outer peripheral surface of the outer can 11. The rising portion 28 is formed by bending the peripheral portion of the outer peripheral portion 24 into a shape along the bottom portion of the outer can 11 of the secondary battery 10. The rising portion 28 has a welding convex portion 22 on the inner surface for welding to the outer peripheral surface of the outer can 11.
【００２０】この接続体２０も、内周部２３と外周部２
４とを段差のある形状に成形しており、外周部２４の平
面部２７と電池端面のカシメ凸条１６との間に絶縁リン
グ４１を配設している。絶縁リング４１は、カシメ凸条
１６の内面を被覆するリング凸条４２を内周縁に一体成
形して設けており、リング凸条４２をカシメ凸条１６の
内側に嵌入して定位置に配設している。さらに、絶縁リ
ング４１は、接続体２０の段差部２５を内周面に当接さ
せて、接続体２０を定位置に配置している。この構造の
組電池も、接続体２０の中心孔２１に緩衝部品５５を配
設して、接続体２０で緩衝部品５５を定位置に保持して
いる。This connecting body 20 also has an inner peripheral portion 23 and an outer peripheral portion 2.
4 is formed in a stepped shape, and an insulating ring 41 is arranged between the flat surface portion 27 of the outer peripheral portion 24 and the crimped ridge 16 on the battery end surface. The insulating ring 41 is provided with a ring ridge 42 that covers the inner surface of the caulking ridge 16 integrally formed on the inner peripheral edge thereof. The ring ridge 42 is fitted inside the caulking ridge 16 and disposed at a fixed position. is doing. Further, the insulating ring 41 brings the stepped portion 25 of the connection body 20 into contact with the inner peripheral surface, and arranges the connection body 20 at a fixed position. Also in the assembled battery of this structure, the buffer component 55 is arranged in the center hole 21 of the connection body 20, and the connection component 20 holds the buffer component 55 at a fixed position.
【００２１】さらに、本発明の組電池は、図１３と図１
４に示す構造とすることもできる。これらの図に示す組
電池は、直線状に連結している二次電池１０の端面の間
に、二次電池１０を電気接続する接続体２０と、この接
続体２０を定位置に配設する保持キャップ３０とを配設
しており、さらに、接続体２０の中心孔２１には、緩衝
部品５５を配設している。これらの図に示す接続体２０
は、前述の図７〜図１０に示す構造のものである。した
がって、以下の実施例において、前述の実施例と同じ構
成要素については、同一番号を付してその説明を省略す
る。Further, the assembled battery of the present invention is shown in FIGS.
Alternatively, the structure shown in FIG. In the assembled battery shown in these drawings, a connecting body 20 for electrically connecting the secondary battery 10 and the connecting body 20 are arranged at fixed positions between the end faces of the linearly connected secondary batteries 10. A holding cap 30 is provided, and a buffer component 55 is provided in the center hole 21 of the connection body 20. Connection body 20 shown in these figures
Is of the structure shown in FIGS. 7 to 10 described above. Therefore, in the following embodiments, the same components as those in the above-mentioned embodiments are designated by the same reference numerals and the description thereof will be omitted.
【００２２】保持キャップ３０は、全体をプラスチック
等の絶縁材で成形している。保持キャップ３０は、隣接
する二次電池１０の間に配設されて、接続体２０を抜け
難いように定位置に保持する。保持キャップ３０は、保
持する接続体２０の両面を対向する電池端面に溶接する
ために貫通孔３３を設けている。The holding cap 30 is entirely made of an insulating material such as plastic. The holding cap 30 is provided between the adjacent secondary batteries 10, and holds the connection body 20 in a fixed position so that the connection body 20 does not easily come off. The holding cap 30 is provided with a through hole 33 for welding both surfaces of the connection body 20 to be held to opposing battery end surfaces.
【００２３】図１３の保持キャップ３０は、接続体２０
を定位置に保持する保持部３２と、この保持部３２の外
周に連結するように成形している筒部３１とを備える。
プラスチック製の保持キャップ３０は、筒部３１と保持
部３２からなる全体を一体的に成形できるので、保持部
３２と筒部３１を別々に製作して連結する必要がない。
貫通孔３３は、保持部３２に開口される。筒部３１は、
周囲に溝部１５のある二次電池１０の端部を挿入してい
る。さらに筒部３１は、抜け難いように二次電池１０に
挿入するために、内面に突出して係止凸部３４を設けて
いる。係止凸部３４は、二次電池１０の端部にある溝部
１５に嵌入されて、保持キャップ３０が二次電池１０か
ら抜け難くする。図の保持キャップ３０は、筒部３１の
内面に沿う凸条を設けて係止凸部３４としている。係止
凸部３４は、必ずしも凸条の形状とする必要はない。係
止凸部は、部分的に突出する凸部を、二次電池の溝部と
対向する位置に設ける形状とすることもできる。The holding cap 30 shown in FIG.
And a cylindrical portion 31 formed to be connected to the outer periphery of the holding portion 32.
Since the plastic holding cap 30 can be integrally molded with the whole of the tubular portion 31 and the holding portion 32, it is not necessary to separately manufacture and connect the holding portion 32 and the tubular portion 31.
The through hole 33 is opened in the holding portion 32. The tube portion 31 is
The end portion of the secondary battery 10 having the groove 15 on the periphery is inserted. Further, the cylindrical portion 31 is provided with a locking convex portion 34 protruding toward the inner surface so as to be inserted into the secondary battery 10 so as not to come off easily. The locking protrusion 34 is fitted into the groove 15 at the end of the secondary battery 10 so that the holding cap 30 does not easily come off from the secondary battery 10. The holding cap 30 shown in the figure is provided with a convex strip along the inner surface of the tubular portion 31 to serve as a locking convex portion 34. The locking protrusion 34 does not necessarily have to be in the shape of a ridge. The locking protrusion may have a shape in which a partially protruding protrusion is provided at a position facing the groove of the secondary battery.
【００２４】係止凸部３４の内面突出高さは、高すぎる
と筒部３１に二次電池１０の端部をスムーズに挿入でき
なくなる。反対に低すぎると、挿入した二次電池１０が
抜けやすくなる。したがって、係止凸部３４の高さは、
スムーズに挿入できて、抜け難いように設計される。保
持キャップは、筒部に縦方向にスリットを設けることが
できる。この筒部は、高い係止凸部を設けてスムーズに
二次電池の端部を挿入できる。スリットで複数に切り離
された筒部が弾性変形しやすくなるからである。ただ、
係止凸部の高さを最適にして、スリットのない筒部に二
次電池をスムーズに挿入しながら、抜け難くすることも
できる。If the protrusion height of the inner surface of the locking projection 34 is too high, the end portion of the secondary battery 10 cannot be smoothly inserted into the tubular portion 31. On the other hand, if it is too low, the inserted secondary battery 10 is likely to come off. Therefore, the height of the locking protrusion 34 is
It is designed so that it can be inserted smoothly and is hard to pull out. The holding cap may be provided with a slit in the longitudinal direction on the tubular portion. The cylindrical portion is provided with a high locking protrusion so that the end portion of the secondary battery can be smoothly inserted. This is because the tubular portion separated by the slit is easily elastically deformed. However,
By optimizing the height of the locking projections, the secondary battery can be inserted into the cylinder portion without slits smoothly and can be made difficult to come off.
【００２５】図１３の保持キャップ３０は、貫通孔３３
を大きくして、保持部３２の幅を狭くしている。大きな
貫通孔３３は、カシメ凸条１６の上方に配設される接続
体２０の外周部２４を、図において上に配設している外
装缶１１の底面に表出させる。保持部３２は、接続体２
０の外周縁の上面に位置して、接続体２０を抜け難いよ
うに定位置に保持する。接続体２０の外形は二次電池１
０の外形にほぼ等しく、いいかえると筒部３１の内形と
ほぼ等しく、筒部３１の内面に当接して水平方向のずれ
が阻止される。さらに、緩衝リング５０の外形も筒部３
１の内形とほぼ等しく、筒部３１に緩衝リング５０を嵌
入している。さらにまた、この図の接続体２０は、内周
部２３と外周部２４との間に段差を設けているので、こ
の段差部２５を緩衝リング５０の内周面に当接して、定
位置に配置される。The holding cap 30 shown in FIG. 13 has a through hole 33.
Is made larger to narrow the width of the holding portion 32. The large through hole 33 exposes the outer peripheral portion 24 of the connecting body 20 arranged above the crimping ridge 16 to the bottom surface of the outer can 11 arranged above in the drawing. The holding part 32 is the connection body 2
It is located on the upper surface of the outer peripheral edge of 0, and holds the connector 20 in a fixed position so as not to come off easily. The outer shape of the connecting body 20 is the secondary battery 1
The outer shape is substantially equal to 0, in other words, substantially the same as the inner shape of the tubular portion 31, and contacts the inner surface of the tubular portion 31 to prevent horizontal displacement. Further, the outer shape of the buffer ring 50 is also the cylindrical portion 3.
A buffer ring 50 is fitted in the tubular portion 31 in a shape substantially equal to the inner shape of the first embodiment. Furthermore, since the connecting body 20 in this figure has a step between the inner peripheral portion 23 and the outer peripheral portion 24, the step portion 25 is brought into contact with the inner peripheral surface of the buffer ring 50 to be in a fixed position. Will be placed.
【００２６】さらに、保持キャップ３０は、図１４に示
す構造とすることもできる。この保持キャップ３０は、
隣接する二次電池１０の間に配設されて、隣接する二次
電池１０を連結する。隣接する二次電池１０を連結する
ために、保持キャップ３０は、互いに連結される一方の
二次電池１０の端部を挿入して連結する第１筒部３７
と、他方の二次電池１０の端部を挿入して連結する第２
筒部３８とを有し、第１筒部３７と第２筒部３８とを互
いに直線状に配設している。隣接するふたつの二次電池
１０は、各々の端部を第１筒部３７と第２筒部３８に挿
入して、保持キャップ３０でもって直線状に連結され
る。Further, the holding cap 30 may have the structure shown in FIG. This holding cap 30
The secondary battery 10 is disposed between the adjacent secondary batteries 10 and connects the adjacent secondary batteries 10. In order to connect the secondary batteries 10 adjacent to each other, the holding cap 30 has a first tubular portion 37 into which the ends of one of the secondary batteries 10 connected to each other are inserted and connected.
And a second secondary battery 10 for inserting and connecting the end of the other secondary battery 10
The tubular portion 38 is provided, and the first tubular portion 37 and the second tubular portion 38 are linearly arranged with respect to each other. The two adjacent secondary batteries 10 are inserted into the first tubular portion 37 and the second tubular portion 38 at their ends, and are linearly connected by the holding cap 30.
【００２７】第１筒部３７及び第２筒部３８は、二次電
池１０の外装缶１１の端部を隙間なく挿入できる筒状に
成形される。円筒型電池の二次電池１０を挿入する第１
筒部３７及び第２筒部３８は、円筒形で、その内径を円
筒型電池の外径にほぼ等しく、正確には内径を円筒型電
池の外径よりもわずかに小さくする。わずかに小さい円
筒状の第１筒部３７及び第２筒部３８は、二次電池１０
を挿入するとわずかに伸びて、二次電池１０の外装缶１
１にぴったりと隙間なく密着する。また、二次電池１０
の外装缶１１は、製造工程によって外径にわずかなバラ
ツキがある。規定の寸法よりもわずかに小さく成形して
いる第１筒部３７及び第２筒部３８は、外径にバラツキ
のある外装缶、とくに細い外装缶の二次電池を隙間なく
挿入できる。第１筒部３７及び第２筒部３８が弾性的に
伸びて、外装缶の太さのバラツキを吸収するからであ
る。The first tubular portion 37 and the second tubular portion 38 are formed into a tubular shape into which the end portion of the outer can 11 of the secondary battery 10 can be inserted without a gap. First to insert the secondary battery 10 of the cylindrical battery
The tubular portion 37 and the second tubular portion 38 are cylindrical and have an inner diameter approximately equal to the outer diameter of the cylindrical battery, and more precisely, an inner diameter slightly smaller than the outer diameter of the cylindrical battery. The slightly smaller cylindrical first cylinder portion 37 and second cylinder portion 38 are used for the secondary battery 10
When inserted, it expands slightly and the outer can 1 of the secondary battery 10
It fits closely to 1 without a gap. In addition, the secondary battery 10
The outer can 11 has a slight variation in outer diameter depending on the manufacturing process. The first cylinder portion 37 and the second cylinder portion 38, which are formed to be slightly smaller than the specified size, can be inserted into an outer can having an outer diameter variation, particularly a secondary battery having a thin outer can without any gap. This is because the first tubular portion 37 and the second tubular portion 38 elastically extend to absorb the variation in the thickness of the outer can.
【００２８】第１筒部３７は、周囲に溝部１５のある二
次電池１０の端部を挿入している。この第１筒部３７
は、内面に突出して係止凸部３４を設けている。係止凸
部３４は、二次電池１０の端部にある溝部１５に嵌入さ
れて、保持キャップ３０が二次電池１０から抜け難くす
る。図の保持キャップ３０は、第１筒部３７の内面に沿
う凸条を設けて係止凸部３４としている。係止凸部は、
必ずしも凸条の形状とする必要はない。係止凸部３４
は、部分的に突出する凸部を、二次電池の溝部と対向す
る位置に設ける形状とすることもできる。さらに、保持
キャップは、第１筒部と第２筒部に縦方向にスリットを
設けて、二次電池の端部にスムーズに挿入することもで
きる。とくに、スリットのある第１筒部は、高い係止凸
部を設けてスムーズに二次電池の端部を挿入できる。ス
リットで複数に切り離された第１筒部が弾性変形しやす
くなるからである。The first cylindrical portion 37 has the end portion of the secondary battery 10 having the groove portion 15 in its periphery inserted therein. This first tubular portion 37
Has a locking projection 34 protruding toward the inner surface. The locking protrusion 34 is fitted into the groove 15 at the end of the secondary battery 10 so that the holding cap 30 does not easily come off from the secondary battery 10. The holding cap 30 shown in the figure is provided with a convex strip along the inner surface of the first tubular portion 37 to serve as a locking convex portion 34. The locking protrusion is
It does not necessarily have to be a convex shape. Locking protrusion 34
Can have a shape in which a partially protruding convex portion is provided at a position facing the groove portion of the secondary battery. Further, the holding cap may be provided with slits in the vertical direction in the first cylinder portion and the second cylinder portion so as to be smoothly inserted into the end portion of the secondary battery. In particular, the first tubular portion having the slit is provided with a high locking protrusion so that the end portion of the secondary battery can be smoothly inserted. This is because the first tubular portion separated into a plurality of slits is easily elastically deformed.
【００２９】さらに、図の保持キャップ３０は、接続体
２０を抜け難いように定位置に保持する保持部３２を設
けている。保持部３２は、第１筒部３７と第２筒部３８
との間に配設されると共に、保持する接続体２０の両面
を対向する電池端面に溶接するために貫通孔３３を設け
ている。貫通孔３３は、保持部３２に開口される。この
保持キャップ３０も、貫通孔３３を大きくして、保持部
３２の幅を狭くしている。大きな貫通孔３３は、カシメ
凸条１６の上方に配設される接続体２０の外周部２４
を、図において上に配設している外装缶１１の底面に表
出させる。保持部３２は、接続体２０の外周縁の上面に
位置して、接続体２０を抜け難いように定位置に保持す
る。接続体２０の外形は二次電池１０の外形にほぼ等し
く、いいかえると第１筒部３７の内形とほぼ等しく、第
１筒部３７の内面に当接して水平方向のずれが阻止され
る。さらに、絶縁リング４１の外形も第１筒部３７の内
形とほぼ等しく、第１筒部３７に絶縁リング４１を嵌入
している。Further, the holding cap 30 shown in the figure is provided with a holding portion 32 for holding the connecting body 20 in a fixed position so as to prevent the connecting body 20 from coming off easily. The holding portion 32 includes a first tubular portion 37 and a second tubular portion 38.
And a through hole 33 for welding both surfaces of the holding connection body 20 to the opposing battery end surfaces. The through hole 33 is opened in the holding portion 32. Also in this holding cap 30, the through hole 33 is enlarged and the width of the holding portion 32 is narrowed. The large through hole 33 is provided on the outer peripheral portion 24 of the connector 20 arranged above the crimped ridge 16.
Is exposed on the bottom surface of the outer can 11 arranged on the upper side in the drawing. The holding portion 32 is located on the upper surface of the outer peripheral edge of the connection body 20 and holds the connection body 20 at a fixed position so as not to come off easily. The outer shape of the connection body 20 is substantially the same as the outer shape of the secondary battery 10, in other words, substantially the same as the inner shape of the first tubular portion 37, and contacts the inner surface of the first tubular portion 37 to prevent horizontal displacement. Furthermore, the outer shape of the insulating ring 41 is substantially the same as the inner shape of the first tubular portion 37, and the insulating ring 41 is fitted in the first tubular portion 37.
【００３０】図１３と図１４に示す保持キャップ３０
は、保持部３２で接続体２０を抜け難いように保持する
が、本発明は、保持キャップが接続体を定位置に保持す
る構造を以上のものに特定しない。保持キャップは、接
続体を保持部の貫通孔に抜け難いように嵌着して定位置
に保持することができる。また、プラスチック製の保持
キャップを成形するときに、接続体をインサートして定
位置に保持することもでき、さらに、接続体を接着して
定位置に保持することもできる。The holding cap 30 shown in FIGS. 13 and 14.
Holds the connection body 20 with the holding portion 32 so as not to come off easily, but the present invention does not specify the structure in which the holding cap holds the connection body in the fixed position as above. The holding cap can be fitted in the through hole of the holding portion so as not to come off easily and can be held in a fixed position. Further, when molding the plastic holding cap, the connector can be inserted and held in place, and the connector can also be bonded and held in place.
【００３１】[0031]
【発明の効果】本発明の組電池は、極めて簡単な構造
で、直列に接続している隣接電池の温度差を少なくし、
直線状に連結している複数の電池温度を均一化できる特
長がある。それは、本発明の組電池が、直線状に連結し
ている電池の電池端面の間に隙間を設け、この隙間に導
電性と熱伝導性があって弾性変形できる緩衝部品を弾性
的に圧縮される状態で配設しているからである。この構
造の組電池は、対向する電池端面の間に熱伝導性を有す
る緩衝部品を配設しているので、隣接する電池間の接触
面積を大きくして、これらの電池間における熱伝導を高
めて、組電池全体における温度分布を均一にできる。と
くに、この緩衝部品は、対向する面をそれ自体の復元力
で電池端面に押圧するように配設しているので、対向し
て配設される電池端面に確実に接触して電気的に接続し
ながら効率よく熱伝導できる。ちなみに、本発明の実施
例の組電池における各電池の温度状態を測定したとこ
ろ、図１５に示すように、従来の組電池に比較して、中
央部分の温度を１割近く下げることができ、全体の温度
分布を均一にできた。このことは、中央部分の電池の、
温度上昇に起因する劣化を有効に防止できることを意味
している。The assembled battery of the present invention has an extremely simple structure and reduces the temperature difference between adjacent batteries connected in series.
It has the feature that the temperatures of multiple batteries connected in a straight line can be equalized. This is because the battery pack of the present invention has a gap between the battery end faces of the linearly connected batteries, and the gap is elastically compressed by the cushioning component that is electrically and thermally conductive and can be elastically deformed. This is because they are arranged in a state where In the assembled battery of this structure, since the buffer component having thermal conductivity is arranged between the opposing battery end faces, the contact area between adjacent batteries is increased to enhance the heat conduction between these batteries. Therefore, the temperature distribution in the entire assembled battery can be made uniform. In particular, since this cushioning component is arranged so that the opposing faces are pressed against the battery end faces by the restoring force of itself, it is ensured that the opposing end faces of the battery are contacted and electrically connected. While conducting heat efficiently. By the way, when the temperature state of each battery in the assembled battery of the example of the present invention was measured, as shown in FIG. 15, the temperature of the central portion could be reduced by nearly 10% as compared with the conventional assembled battery, The entire temperature distribution could be made uniform. This means that the central battery
This means that deterioration due to temperature rise can be effectively prevented.
【００３２】さらに、本発明の組電池は、熱伝導性に加
えて導電性を有する緩衝部品を対向する電池端面の間に
配設しているので、隣接する電池間の接触抵抗を低減し
て、複数の電池を直列に接続する部分の電気抵抗を小さ
くできる特長がある。このように接続部分の電気抵抗を
小さくできる組電池は、電気的な損失を低減して出力電
圧を大きくできる。Further, in the assembled battery of the present invention, since the buffer component having heat conductivity as well as conductivity is disposed between the opposing battery end faces, the contact resistance between adjacent batteries can be reduced. , It has a feature that the electric resistance of the part where a plurality of batteries are connected in series can be reduced. In the battery pack in which the electrical resistance of the connection portion can be reduced in this manner, the electrical loss can be reduced and the output voltage can be increased.
【図１】従来の組電池の連結構造を示す縦断面図FIG. 1 is a vertical cross-sectional view showing a conventional assembled battery connecting structure.
【図２】図１に示す組電池の接続体を示す斜視図FIG. 2 is a perspective view showing a connected body of the assembled battery shown in FIG.
【図３】従来の組電池の温度分布を示すグラフFIG. 3 is a graph showing a temperature distribution of a conventional battery pack.
【図４】本発明の一実施例にかかる組電池の側面図FIG. 4 is a side view of an assembled battery according to an embodiment of the present invention.
【図５】図４に示す組電池の連結構造を示す拡大断面図5 is an enlarged cross-sectional view showing a connecting structure of the assembled battery shown in FIG.
【図６】本発明の他の実施例にかかる組電池の連結構造
を示す拡大断面図FIG. 6 is an enlarged sectional view showing a connecting structure of an assembled battery according to another embodiment of the present invention.
【図７】図５に示す組電池の接続体を示す斜視図FIG. 7 is a perspective view showing a connected body of the assembled battery shown in FIG.
【図８】図７に示す接続体の正面図8 is a front view of the connection body shown in FIG.
【図９】図７に示す接続体の平面図9 is a plan view of the connection body shown in FIG.
【図１０】図９に示す接続体のＡ−Ａ線断面図10 is a cross-sectional view taken along the line AA of the connection body shown in FIG.
【図１１】本発明の他の実施例にかかる組電池の連結構
造を示す拡大断面図FIG. 11 is an enlarged sectional view showing a connecting structure of an assembled battery according to another embodiment of the present invention.
【図１２】図１１に示す接続体の斜視図FIG. 12 is a perspective view of the connection body shown in FIG.
【図１３】本発明の他の実施例にかかる組電池の連結構
造を示す拡大断面図FIG. 13 is an enlarged cross-sectional view showing an assembled battery connecting structure according to another embodiment of the present invention.
【図１４】本発明の他の実施例にかかる組電池の連結構
造を示す拡大断面図FIG. 14 is an enlarged sectional view showing a connecting structure of an assembled battery according to another embodiment of the present invention.
【図１５】本発明の一実施例にかかる組電池の温度分布
を示すグラフFIG. 15 is a graph showing a temperature distribution of an assembled battery according to an example of the present invention.
１０…電池 １１…外装缶 １２…封口板 １３…凸部電極 １４…ガスケット １５…溝部 １６…カシメ凸条 １８…平面電極 ２０…接続体 ２１…中心孔 ２２…溶接凸部 ２３…内周部 ２４…外周部 ２５…段差部 ２７…平面部 ２８…立上部 ２９…突出部 ３０…保持キャップ ３１…筒部 ３２…保持部 ３３…貫通孔 ３４…係止凸部 ３７…第１筒部 ３８…第２筒部 ４１…絶縁リング ４２…リング凸条 ５４…隙間 ５５…緩衝部品 ９０…接続体 ９３…平面部 ９４…円筒部 10 ... Battery 11 ... Exterior can 12 ... Sealing plate 13 ... Convex electrode 14 ... Gasket 15 ... Groove 16 ... Caulking convex strip 18 ... Planar electrode 20 ... Connected body 21 ... central hole 22 ... Welding protrusion 23 ... Inner circumference 24 ... Outer periphery 25 ... Step 27 ... Plane 28 ... Rise 29 ... Projection 30 ... Retaining cap 31 ... Cylinder 32 ... Holding unit 33 ... Through hole 34 ... Locking protrusion 37 ... 1st cylinder part 38 ... Second cylinder 41 ... Insulation ring 42 ... Ring ridge 54 ... Gap 55 ... Cushion parts 90 ... Connected body 93 ... Plane 94 ... Cylindrical part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤田 健 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 Ｆターム(参考） 5H031 AA09 EE01 EE04 KK01 KK08 5H040 AA19 AA28 AS07 AT01 AY01 JJ03 LL01 LL06 LL07 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Ken Fujita 2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture Within Yo Denki Co., Ltd. F-term (reference) 5H031 AA09 EE01 EE04 KK01 KK08 5H040 AA19 AA28 AS07 AT01 AY01 JJ03 LL01 LL06 LL07
Claims (4)
あるいは接続体(20)を介して互いに溶接して、複数の電
池(10)を直線状に連結している組電池であって、 直線状に連結している電池(10)の電池端面の間に隙間(5
4)を設け、この隙間(54)に、導電性と熱伝導性があって
弾性変形できる緩衝部品(55)を弾性的に圧縮される状態
で配設しており、この緩衝部品(55)は対向する面をそれ
自体の復元力で電池端面に押圧しており、緩衝部品(55)
が対向して配設している電池端面を電気的に接続すると
共に、対向して配設している電池端面に熱伝導する状態
で接触してなる組電池。1. An assembled battery in which a plurality of batteries (10) are linearly connected to each other by welding end faces of the batteries, which are arranged to face each other, directly or through a connecting body (20). Between the battery end faces of the batteries (10) connected in a straight line (5
4) is provided, and a buffer component (55) having electrical conductivity and thermal conductivity and capable of elastic deformation is disposed in this gap (54) in an elastically compressed state. Presses the opposing surface against the battery end surface with its own restoring force, and the cushioning component (55)
A battery pack that electrically connects the end faces of the batteries that are arranged so as to face each other and is in contact with the end faces of the batteries that are arranged so as to be in thermal conduction.
集合体、スプリングワッシャ、導電ゴム、導電性のある
軟質プラスチックのいずれかである請求項１に記載の組
電池。2. The assembled battery according to claim 1, wherein the cushioning component (55) is any one of a foam metal, an assembly of metal fibers, a spring washer, conductive rubber, and conductive soft plastic.
を介して直線状に連結され、接続体(20)の中心孔(21)に
緩衝部品(55)を配設して、接続体(20)で緩衝部品(55)を
定位置に保持すると共に、緩衝部品(55)を接続体(20)に
接触させて緩衝部品(55)と接続体(20)を電気接続し、か
つ、緩衝部品(55)から接続体(20)に熱伝導できる状態と
してなる請求項１に記載の組電池。3. A connection body (20) for a battery (10) having a central hole (21).
Linearly connected via, the buffer member (55) is arranged in the central hole (21) of the connection body (20), and the connection member (20) holds the buffer component (55) in place. A state in which the cushioning component (55) is brought into contact with the connection body (20) to electrically connect the cushioning component (55) and the connection body (20), and heat can be conducted from the cushioning component (55) to the connection body (20). The assembled battery according to claim 1, wherein:
凸部電極(13)に押圧して電気接続しており、他方の面を
電池端面の平面電極(18)に押圧して電気接続してなる請
求項１に記載の組電池。4. The buffer component (55) presses one surface against the convex electrode (13) on the battery end surface for electrical connection, and presses the other surface against the flat electrode (18) on the battery end surface. The battery pack according to claim 1, wherein the battery pack is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002024805A JP2003229107A (en) | 2002-01-31 | 2002-01-31 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002024805A JP2003229107A (en) | 2002-01-31 | 2002-01-31 | Battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003229107A true JP2003229107A (en) | 2003-08-15 |
Family
ID=27747141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002024805A Pending JP2003229107A (en) | 2002-01-31 | 2002-01-31 | Battery pack |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003229107A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005317280A (en) * | 2004-04-27 | 2005-11-10 | Sanyo Electric Co Ltd | Battery pack |
| WO2007094263A1 (en) * | 2006-02-13 | 2007-08-23 | Nissan Motor Co., Ltd. | Cell module, battery pack and vehicle with such batteries mounted thereon |
| JP2008084691A (en) * | 2006-09-27 | 2008-04-10 | Toyota Motor Corp | Battery unit and vehicle |
| KR101089094B1 (en) * | 2006-11-13 | 2011-12-06 | 주식회사 엘지화학 | Electrical Connecting Structure Having Uniform Contact Resistance at High Temperature |
| JP2012530334A (en) * | 2009-06-19 | 2012-11-29 | リ−テック・バッテリー・ゲーエムベーハー | Battery structure and manufacturing method thereof |
| JP2016534518A (en) * | 2013-08-30 | 2016-11-04 | ゴゴロ インク | Portable electric energy storage device with thermal runaway mitigation |
-
2002
- 2002-01-31 JP JP2002024805A patent/JP2003229107A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005317280A (en) * | 2004-04-27 | 2005-11-10 | Sanyo Electric Co Ltd | Battery pack |
| WO2007094263A1 (en) * | 2006-02-13 | 2007-08-23 | Nissan Motor Co., Ltd. | Cell module, battery pack and vehicle with such batteries mounted thereon |
| JP2007242593A (en) * | 2006-02-13 | 2007-09-20 | Nissan Motor Co Ltd | Battery module, battery pack, and vehicle with such batteries mounted thereon |
| KR100977353B1 (en) | 2006-02-13 | 2010-08-20 | 닛산 지도우샤 가부시키가이샤 | Cell module, battery pack and vehicle with such batteries mounted thereon |
| CN101385161B (en) * | 2006-02-13 | 2011-04-13 | 日产自动车株式会社 | Cell module, battery pack and vehicle with such batteries mounted thereon |
| US9299973B2 (en) | 2006-02-13 | 2016-03-29 | Nissan Motor Co., Ltd. | Battery module, assembled battery, and vehicle including these batteries |
| JP2008084691A (en) * | 2006-09-27 | 2008-04-10 | Toyota Motor Corp | Battery unit and vehicle |
| KR101089094B1 (en) * | 2006-11-13 | 2011-12-06 | 주식회사 엘지화학 | Electrical Connecting Structure Having Uniform Contact Resistance at High Temperature |
| JP2012530334A (en) * | 2009-06-19 | 2012-11-29 | リ−テック・バッテリー・ゲーエムベーハー | Battery structure and manufacturing method thereof |
| JP2016534518A (en) * | 2013-08-30 | 2016-11-04 | ゴゴロ インク | Portable electric energy storage device with thermal runaway mitigation |
| JP2020115452A (en) * | 2013-08-30 | 2020-07-30 | ゴゴロ インク | Portable electric energy storage device with thermal runaway mitigation |
| JP7106589B2 (en) | 2013-08-30 | 2022-07-26 | ゴゴロ インク | Portable electrical energy storage device with thermal runaway mitigation |
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