JP4683855B2 - Pack battery - Google Patents

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JP4683855B2
JP4683855B2 JP2004134093A JP2004134093A JP4683855B2 JP 4683855 B2 JP4683855 B2 JP 4683855B2 JP 2004134093 A JP2004134093 A JP 2004134093A JP 2004134093 A JP2004134093 A JP 2004134093A JP 4683855 B2 JP4683855 B2 JP 4683855B2
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battery
metal plate
battery pack
welded
lead
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JP2005317368A (en
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正一 遠矢
秀世 森田
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Sanyo Electric Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Connection Of Batteries Or Terminals (AREA)

Description

本発明は、複数の二次電池の電極に金属プレートを溶接し、この金属プレートでもって、隣接する電池を電気的に直列又は並列に接続し、さらに、この金属プレートでもって電池を連結しているパック電池に関する。   The present invention welds a metal plate to the electrodes of a plurality of secondary batteries, electrically connects adjacent batteries in series or in parallel with the metal plate, and further connects the batteries with the metal plate. It relates to the battery pack.

電池は、リード板を電極にスポット溶接する構造で確実に接続される。このため、機器に内蔵される電池、あるいは複数の電池を直列又は並列に接続するパック電池において、この構造が採用される。   The battery is securely connected with a structure in which the lead plate is spot welded to the electrode. For this reason, this structure is adopted in a battery built in a device or a battery pack in which a plurality of batteries are connected in series or in parallel.

電極にスポット溶接されたリード板は、電極に対して動かないようにしっかりと固定される。スポット溶接は、リード板を電極に接続する電気的な特性、たとえば接触不良を解消することからすれば理想的な特性を示す。ただ、リード板と電池との間に遊びがないために、電池が振動する時に、あるいは電池の相対位置がずれるときに、リード板を介して電池に無理な力が作用することがある。電池の溶接部に作用する無理な力は、電池の封口板のかしめ部やレーザー溶接部に損傷を与えて、隙間を発生させる等の原因となる。この部分に隙間ができると、外装缶に充填している電解液が漏れる等の弊害が発生する。   The lead plate spot welded to the electrode is firmly fixed so as not to move with respect to the electrode. Spot welding exhibits ideal characteristics from the viewpoint of eliminating electrical characteristics that connect the lead plate to the electrodes, for example, poor contact. However, since there is no play between the lead plate and the battery, an excessive force may act on the battery via the lead plate when the battery vibrates or when the relative position of the battery shifts. The unreasonable force acting on the welded part of the battery causes damage to the caulking part of the sealing plate of the battery and the laser welded part, and causes a gap. If there is a gap in this part, there will be a negative effect such as leakage of the electrolyte filled in the outer can.

リード板の無理な力が電池に作用するのを防止するために、リード板の途中を湾曲させて、その先端部を電池に溶接する接続構造が開発されている（特許文献１及び２参照）。
特許第３４５９５６７号公報 特開２００３−７７４５０号公報 In order to prevent an excessive force of the lead plate from acting on the battery, a connection structure has been developed in which the lead plate is bent in the middle and its tip is welded to the battery (see Patent Documents 1 and 2). .
Japanese Patent No. 3449567 JP 2003-77450 A

これ等の公報に記載されるパック電池は、細長いリード板の一部をＵ曲して、その先端を電極に溶接して接続している。この構造のリード板は、Ｕ曲部を変形させることで、リード板に作用する無理な力を吸収できる。このため、リード板に作用する力が直接に電池に作用するのを防止できる。ただ、この構造では、隣接する電池を位置がずれないように連結することができない。それは、細長いリード板が変形して、隣接する電池の相対位置がずれるからである。また、Ｕ曲したリード板は実質的な厚さが相当に厚くなる。また、自由に変形できるようにＵ曲部の曲率半径を大きくすると、実質的な厚さは益々厚くなってしまう欠点もある。したがって、この構造は、電気機器に内蔵される電池をリード板で回路基板等に接続する構造には利用できても、複数の電池を位置ずれしないようにブロック状に連結するパック電池には採用できない。とくに車両用のパック電池のように、各々の電池をリード板でしっかりと連結してケースに収納するものには利用できない。   In the battery pack described in these publications, a part of an elongated lead plate is bent in a U shape, and its tip is welded to an electrode. The lead plate having this structure can absorb an unreasonable force acting on the lead plate by deforming the U-curved portion. For this reason, it can prevent that the force which acts on a lead board acts on a battery directly. However, in this structure, it is not possible to connect adjacent batteries so as not to shift their positions. This is because the elongated lead plates are deformed and the relative positions of adjacent batteries are shifted. Also, the U-curved lead plate is substantially thicker. In addition, if the radius of curvature of the U-curved portion is increased so that it can be freely deformed, there is a disadvantage that the substantial thickness becomes increasingly thicker. Therefore, this structure can be used to connect batteries built in electrical equipment to circuit boards, etc. using lead plates, but it is used for battery packs that connect multiple batteries in blocks so that they do not shift their positions. Can not. In particular, such as a battery pack battery, it is not possible to use each battery that is firmly connected with a lead plate and stored in a case.

本発明は、隣の電池をしっかりと連結しながら、電池を連結するリード板のように金属プレートを介して無理な力が作用するのを解消することを目的に開発されたもので、本発明の大切な目的は、金属プレートを介して各々の電池をしっかりと連結すると共に、金属プレートの専有するスペースを増加させることなく、金属プレートを介して電池の連結部分に作用する力を少なくできるパック電池を提供することにある。   The present invention was developed for the purpose of eliminating an excessive force acting through a metal plate like a lead plate connecting batteries while firmly connecting adjacent batteries. The important purpose of the pack is to firmly connect each battery through the metal plate and reduce the force acting on the connection part of the battery through the metal plate without increasing the space occupied by the metal plate To provide a battery.

本発明のパック電池は、隣接する電池１の電極２に金属プレート３を溶接して電池１を連結している。金属プレート３は、隣接する電池１に溶接して固定される本体部４の平面視における内部に内部溶着部５を設けており、この内部溶着部５の外周には、スリットである複数の貫通孔７を設け、該貫通孔７の間の金属プレート３をリード部８として、貫通孔７と貫通孔７の間のリード部８とからなる可撓性周壁部６を設けている。この金属プレート３は、可撓性周壁部６でもって、内部溶着部５を本体部４に対して変位できる状態で電池１の電極２に溶接して固定している。
 Packs battery of the present invention, connects the battery 1 by welding metal plate 3 on the electrode 2 of the adjacent cell 1. The metal plate 3 is provided with an internal weld portion 5 in a plan view of the main body portion 4 that is welded and fixed to the adjacent battery 1, and a plurality of slits that are slits are formed on the outer periphery of the internal weld portion 5. A hole 7 is provided, and the metal plate 3 between the through holes 7 is used as a lead portion 8, and a flexible peripheral wall portion 6 including the through hole 7 and the lead portion 8 between the through holes 7 is provided. The metal plate 3 is welded and fixed to the electrode 2 of the battery 1 in a state where the inner welded portion 5 can be displaced with respect to the main body portion 4 with the flexible peripheral wall portion 6.

本発明のパック電池は、リード部８を湾曲するように成形することができる。さらに、さらに、本発明のパック電池は、可撓性周壁部６に複数の貫通孔７と複数のリード部８とを設けて、貫通孔７を内部溶着部５の外周に沿う方向に細長い形状のスリットとすることができる。   The battery pack of the present invention can be formed such that the lead portion 8 is curved. Furthermore, the battery pack of the present invention is provided with a plurality of through-holes 7 and a plurality of lead portions 8 in the flexible peripheral wall portion 6, and the through-holes 7 are elongated in the direction along the outer periphery of the internal weld portion 5. It can be set as a slit.

さらに、本発明のパック電池は、本体部４に複数の内部溶着部５を設けて、各々の内部溶着部５を電池１の電極２に溶接して、互いに平行な姿勢で隣接している複数の電池１を連結することができる。さらにまた、本発明のパック電池は、車両用のパック電池とすることができる。   Furthermore, the battery pack of the present invention is provided with a plurality of internal welds 5 in the main body 4 and welds each internal weld 5 to the electrode 2 of the battery 1 so as to be adjacent to each other in parallel postures. The battery 1 can be connected. Furthermore, the battery pack of the present invention can be a vehicle battery pack.

本発明のパック電池は、金属プレートを介して各々の電池をしっかりと連結すると共に、金属プレートの専有するスペースを増加させることなく、金属プレートを介して電池の連結部分に作用する力を少なくできる特長がある。それは、本発明のパック電池が、独特の構造の金属プレートを介して電池を連結しているからである。電池を連結する金属プレートは、本体部の内部を内部溶着部とし、この内部溶着部の周囲に変形しやすい可撓性周壁部を設けている。可撓性周壁部は、金属プレートをダイヤフラムの周囲のように湾曲して変形しやすくし、または貫通孔の間にリード部を設けて変形しやすくしている。この構造のパック電池は、衝撃で電池が振動し、あるいは何等かの原因で電池の相対位置がずれても、そのずれや衝撃力を可撓性周壁部に吸収できる。このため、衝撃等を受けても電池に無理な力が作用せず、とくに金属プレートに溶接している封口板等に無理な力が作用せず、封口板のかしめ部やレーザー溶接部の損傷や液漏れを有効に阻止できる。   The battery pack according to the present invention can securely connect each battery via the metal plate, and can reduce the force acting on the connecting portion of the battery via the metal plate without increasing the space occupied by the metal plate. There are features. This is because the battery pack of the present invention connects the batteries via a metal plate having a unique structure. The metal plate for connecting the batteries has an inner welded portion inside the main body portion, and a flexible peripheral wall portion that is easily deformed is provided around the inner welded portion. The flexible peripheral wall portion is easily deformed by bending the metal plate like the periphery of the diaphragm or by providing a lead portion between the through holes. In the battery pack having this structure, even if the battery vibrates due to an impact or the relative position of the battery shifts due to some reason, the shift or impact force can be absorbed by the flexible peripheral wall. For this reason, an excessive force does not act on the battery even if it receives an impact, etc. Especially, an excessive force does not act on the sealing plate welded to the metal plate, and damage to the caulking portion of the sealing plate and the laser welded portion. And liquid leakage can be effectively prevented.

とくに、本発明のパック電池は、本体部の内部に内部溶着部を設け、この内部溶着部の周囲を可撓性周壁部として本体部に連結するので、従来の金属プレートに比較して一部がわずかに厚くなるのみで、金属プレートが専有する体積が増加して、パック電池の外形を大きくする等の弊害はない。とくに、金属プレートを封口板の凸部電極に溶接する構造にあっては、凸部電極の周囲に隙間ができ、この隙間に可撓性周壁部を配置することができる。このため、従来のパック電池と外形を全く同じにしながら、電池に受ける衝撃等を可撓性周壁部で緩衝して、これに起因する故障を極減できる。   In particular, the battery pack according to the present invention is provided with an internal weld portion inside the main body portion, and the periphery of the internal weld portion is connected to the main body portion as a flexible peripheral wall portion. However, there is no adverse effect such as increasing the volume of the metal plate and enlarging the outer shape of the battery pack. In particular, in the structure in which the metal plate is welded to the convex electrode of the sealing plate, a gap is formed around the convex electrode, and a flexible peripheral wall portion can be disposed in this gap. For this reason, while making the external shape exactly the same as that of the conventional battery pack, the impact received on the battery is buffered by the flexible peripheral wall portion, and the failure due to this can be minimized.

さらにまた、本発明のパック電池は、金属プレートの本体部の内部に内部溶着部を設けて、内部溶着部を電池に連結している。電池を溶接して固定する内部溶着部は、その全周に本体部があり、この本体部に内部溶着部を連結している。このため、内部溶着部と本体部との連結強度を強く保持しながら、内部溶着部を本体部に対して変位できる状態にできる。したがって、金属プレートが隣の電池をしっかりと連結しながら、衝撃等で電池に作用する無理な力を可撓性周壁部に有効に吸収できる。   Furthermore, in the battery pack of the present invention, an internal weld is provided inside the main body of the metal plate, and the internal weld is connected to the battery. The internal welded part for welding and fixing the battery has a main body part on the entire circumference, and the internal welded part is connected to the main body part. For this reason, it can be made the state which can displace an internal weld part with respect to a main-body part, hold | maintaining strongly the connection strength of an internal weld part and a main-body part. Therefore, an excessive force acting on the battery due to an impact or the like can be effectively absorbed by the flexible peripheral wall portion while the metal plate firmly connects the adjacent batteries.

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パック電池を例示するものであって、本発明はパック電池を以下のものに特定しない。   Embodiments of the present invention will be described below with reference to the drawings. However, the example shown below illustrates the battery pack for embodying the technical idea of the present invention, and the present invention does not specify the battery pack as follows.

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

本発明のパック電池は、電池が振動し、あるいは電池の相対位置がずれても無理な力が作用しないように金属プレートで連結したものであるから、振動の激しい自動車、電動バイク、自転車等の車両用の電源、または電動工具の電源に適している。   Since the battery pack of the present invention is connected by a metal plate so that an excessive force does not act even if the battery vibrates or the relative position of the battery shifts, the battery such as an automobile, an electric motorcycle, a bicycle, etc. Suitable for power supplies for vehicles or power tools.

図１に示すパック電池は、隣接する電池１の電極２に金属プレート３を溶接して電池１を連結している。パック電池は、金属プレート３で連結している電池１をケース（図示せず）に収納している。この図に示すパック電池は、図２の回路図に示すように、直列に接続している電池１をさらに並列に接続している。したがって、両端の電池１は、金属プレート３で２本が並列に接続され、中間では４本の電池１が金属プレート３で接続される。   In the battery pack shown in FIG. 1, a battery 1 is connected by welding a metal plate 3 to an electrode 2 of an adjacent battery 1. The battery pack stores a battery 1 connected by a metal plate 3 in a case (not shown). In the battery pack shown in this figure, as shown in the circuit diagram of FIG. 2, the batteries 1 connected in series are further connected in parallel. Therefore, two batteries 1 at both ends are connected in parallel by the metal plate 3, and four batteries 1 are connected by the metal plate 3 in the middle.

図１のパック電池は、複数の電池１を平行な姿勢で横に並べて金属プレート３で連結している。さらに、この図のパック電池は、同一平面に並べている２組の電池ブロック１０を、２段に並べて金属プレート３で連結している。上段の電池ブロック１０と下段の電池ブロック１０は、金属プレート３で互いに並列に接続されている。さらに、各々の電池ブロック１０は、金属プレート３を介して電池１を直列に接続している。   In the battery pack of FIG. 1, a plurality of batteries 1 are arranged side by side in a parallel posture and connected by a metal plate 3. Furthermore, in the battery pack of this figure, two sets of battery blocks 10 arranged in the same plane are arranged in two stages and connected by a metal plate 3. The upper battery block 10 and the lower battery block 10 are connected to each other in parallel by a metal plate 3. Further, each battery block 10 connects the batteries 1 in series via the metal plate 3.

隣の電池１を連結する金属プレート３は金属板で製作される。図１のパック電池は、２本の電池１を連結する細長い形状の金属プレート３と、４本の電池１を連結する四角形の金属プレート３とが、電池１を連結している。これ等の金属プレート３は、隣接する電池１に溶接して固定される本体部４の内部に内部溶着部５を設けている。図３と図４の金属プレート３は、図５と図６の断面図に示すように、本体部４と内部溶着部５を同一平面に位置させており、内部溶着部５の周囲に可撓性周壁部６を設けて、可撓性周壁部６を介して、内部溶着部５を本体部４に連結している。   The metal plate 3 that connects the adjacent batteries 1 is made of a metal plate. In the battery pack of FIG. 1, an elongated metal plate 3 that connects two batteries 1 and a rectangular metal plate 3 that connects four batteries 1 connect the batteries 1. These metal plates 3 are provided with an internal weld portion 5 inside a main body portion 4 which is welded and fixed to the adjacent battery 1. The metal plate 3 of FIGS. 3 and 4 has the main body 4 and the inner welded portion 5 located on the same plane as shown in the cross-sectional views of FIGS. 5 and 6, and is flexible around the inner welded portion 5. A peripheral wall portion 6 is provided, and the internal welded portion 5 is connected to the main body portion 4 via the flexible peripheral wall portion 6.

図の金属プレート３は、内部溶着部５の外周に円形リング状に設けている可撓性周壁部６に、複数の貫通孔７を設け、隣接する貫通孔７の間にリード部８を設けて可撓性周壁部６としている。貫通孔７は、内部溶着部５の外周に沿う方向に細長い形状のスリットである。図の金属プレート３は、可撓性周壁部６を円形リング状としているので、スリットは円形リングに沿う細長い形状としている。さらに、図の金属プレート３は、可撓性周壁部６に４つの貫通孔７を設けて、貫通孔７の間に４つのリード部８を設けている。さらにまた、図の金属プレート３は、リード部８を湾曲する形状にプレス加工している。この構造の金属プレート３は、可撓性周壁部６のリード部８の幅を広くしながら変形しやすくできる。このため、リード部８の電気抵抗を小さくしながら、内部溶着部５を本体部４に対して変位させやすく、内部溶着部５を溶接して固定している電池１に無理な力が作用するのを特に効果的に防止できる。   In the illustrated metal plate 3, a plurality of through holes 7 are provided in a flexible peripheral wall portion 6 provided in a circular ring shape on the outer periphery of the internal weld portion 5, and lead portions 8 are provided between adjacent through holes 7. Thus, the flexible peripheral wall portion 6 is formed. The through hole 7 is a slit that is elongated in the direction along the outer periphery of the internal weld 5. In the illustrated metal plate 3, the flexible peripheral wall 6 has a circular ring shape, so that the slit has an elongated shape along the circular ring. Furthermore, the metal plate 3 shown in the figure is provided with four through holes 7 in the flexible peripheral wall portion 6, and four lead portions 8 are provided between the through holes 7. Furthermore, the metal plate 3 in the figure is pressed into a shape that curves the lead portion 8. The metal plate 3 having this structure can be easily deformed while increasing the width of the lead portion 8 of the flexible peripheral wall portion 6. For this reason, it is easy to displace the internal welding part 5 with respect to the main body part 4 while reducing the electrical resistance of the lead part 8, and an unreasonable force acts on the battery 1 that is welded and fixed to the internal welding part 5. Can be effectively prevented.

ただし、本発明のパック電池は、必ずししも可撓性周壁部にスリットを設ける必要はなく、内部溶着部の周囲を湾曲成形して、湾曲成形された部分を可撓性周壁部とすることもできる。この構造の金属プレートは、内部溶着部の全周に連続して可撓性周壁部を設けることができるので、可撓性周壁部の電気抵抗を最も小さくしながら、内部溶着部と本体部とをしっかりと連結できる。このため、金属プレートを介して隣接する電池を強固に連結できる特長がある。この金属プレートは、湾曲形状で変形しやすくしている可撓性周壁部を変形させて、内部溶着部を本体部に対して変位させる。   However, in the battery pack of the present invention, it is not always necessary to provide a slit in the flexible peripheral wall, and the periphery of the inner welded part is curved and the curved part is used as the flexible peripheral wall. You can also. Since the metal plate having this structure can be provided with a flexible peripheral wall portion continuously around the entire circumference of the internal weld portion, the internal weld portion, the main body portion, Can be firmly connected. For this reason, there exists the feature which can connect the adjacent battery firmly through a metal plate. The metal plate deforms the flexible peripheral wall portion that is easily deformed with a curved shape, and displaces the internal welded portion with respect to the main body portion.

さらに、本発明のパック電池は、貫通孔の間に設けているリード部を湾曲成形することなく、内部溶着部と本体部とリード部を平面状とすることもできる。この金属プレートは、細長いスリット状の貫通孔を長く、リード部の幅を狭くして、リード部を変形しやすくできる。幅が狭くて細いリード部は変形しやすく、内部溶着部を変位できる状態で本体部に連結する。このため、内部溶着部を連結している電池が振動し、あるいは位置がずれるときに、電池に作用する無理な力を少なくできる。   Furthermore, in the battery pack of the present invention, the internal welded portion, the main body portion, and the lead portion can be made flat without bending the lead portion provided between the through holes. This metal plate can be easily deformed by making the elongated slit-like through hole long and narrowing the width of the lead portion. The narrow and narrow lead part is easily deformed and is connected to the main body part in a state where the internal welded part can be displaced. For this reason, when the battery which connected the internal welding part vibrates or a position shifts, the unreasonable force which acts on a battery can be decreased.

図３と図４に示す金属プレート３は、本体部４に複数の内部溶着部５を設け、各々の内部溶着部５を電池１に接続している。この構造の金属プレート３で連結されるパック電池は、全ての電池１を金属プレート３の内部溶着部５に接続しているので、各々の内部溶着部５の外周に設けている可撓性周壁部６を、各々の電池１に作用する無理な力の緩衝部として、電池１に作用する力を少なくできる。とくに、金属プレート３の内部溶着部５を電池１の封口板にスポット溶接しているパック電池は、内部溶着部５の周囲に設けている可撓性周壁部６を各々の電池１に作用する力の緩衝部とすることができる。このため、全ての電池１の封口板に無理な力が作用せず、振動や衝撃で封口板やかしめ部の損傷を有効に防止できる。   The metal plate 3 shown in FIG. 3 and FIG. 4 is provided with a plurality of internal welds 5 in the main body 4, and each internal weld 5 is connected to the battery 1. In the battery pack connected by the metal plate 3 having this structure, since all the batteries 1 are connected to the internal welded portions 5 of the metal plate 3, the flexible peripheral wall provided on the outer periphery of each internal welded portion 5. The force acting on the battery 1 can be reduced by using the portion 6 as a buffer portion for excessive force acting on each battery 1. In particular, in a battery pack in which the internal welded portion 5 of the metal plate 3 is spot-welded to the sealing plate of the battery 1, the flexible peripheral wall portion 6 provided around the internal welded portion 5 acts on each battery 1. Can be a force buffer. For this reason, excessive force does not act on the sealing plates of all the batteries 1, and damage to the sealing plates and the caulking portions can be effectively prevented due to vibration and impact.

たた、本発明のパック電池は、図示しないが、本体部を直接に隣の電池に溶接して固定し、内部溶着部を別の電池に溶接して連結する構造とすることもできる。   However, although not shown, the battery pack of the present invention may be structured such that the main body portion is directly welded and fixed to the adjacent battery, and the internal welded portion is welded and connected to another battery.

さらに、図１のパック電池は、電池１の中間に接続される金属プレート３に電圧端子９を設けている。電圧端子９は各々の電池１の電圧を検出するための端子である。この電圧端子９は、図２の回路図に示すように、リード線１１を介して電圧検出回路１２に接続されて、各々の電池電圧が検出される。電圧検出回路１２は、電池電圧を検出して、電池１の過充電や過放電を検出し、電池１の過充電と過放電を防止するように、充放電を制御する。このように各々の電池電圧を検出するパック電池は、電池１をリチウムイオン二次電池とするものに適している。リチウムイオン二次電池は、電池電圧で残容量を検出でき、さらに電圧が高いので、電圧をコントロールしながら充放電させることが大切であるからである。ただし、本発明のパック電池は、電池をリチウムイオン二次電池に特定しない。電池には、ニッケル水素電池やニッケルカドミウム電池など、充電できる全ての電池とすることができる。   Further, the battery pack of FIG. 1 is provided with a voltage terminal 9 on a metal plate 3 connected in the middle of the battery 1. The voltage terminal 9 is a terminal for detecting the voltage of each battery 1. As shown in the circuit diagram of FIG. 2, the voltage terminal 9 is connected to a voltage detection circuit 12 via a lead wire 11, and each battery voltage is detected. The voltage detection circuit 12 detects battery voltage, detects overcharge and overdischarge of the battery 1, and controls charging and discharging so as to prevent overcharge and overdischarge of the battery 1. Thus, the pack battery which detects each battery voltage is suitable for what uses the battery 1 as a lithium ion secondary battery. This is because the lithium ion secondary battery can detect the remaining capacity based on the battery voltage and has a higher voltage. Therefore, it is important to charge and discharge while controlling the voltage. However, the battery pack of the present invention does not specify a battery as a lithium ion secondary battery. The battery can be any battery that can be charged, such as a nickel metal hydride battery or a nickel cadmium battery.

図の金属プレート３は、内部溶着部５にスポット溶接の無効電流を少なくする内部スリット１３を設けている。内部溶着部５は、この内部スリット１３の両側で電池１の電極２にスポット溶接して固定される。   The metal plate 3 shown in the figure is provided with an internal slit 13 in the internal weld 5 for reducing the reactive current of spot welding. The internal weld 5 is fixed by spot welding to the electrode 2 of the battery 1 on both sides of the internal slit 13.

本発明の一実施例にかかるパック電池の斜視図である。1 is a perspective view of a battery pack according to an embodiment of the present invention. 本発明の一実施例にかかるパック電池の回路図である。1 is a circuit diagram of a battery pack according to an embodiment of the present invention. ４本の電池を連結する金属プレートの一例を示す正面図である。It is a front view which shows an example of the metal plate which connects four batteries. ２本の電池を連結する金属プレートの一例を示す正面図である。It is a front view which shows an example of the metal plate which connects two batteries. 図４に示す金属プレートのＡ−Ａ線断面図である。It is the sectional view on the AA line of the metal plate shown in FIG. 図４に示す金属プレートのＢ−Ｂ線断面図である。FIG. 5 is a cross-sectional view of the metal plate shown in FIG. 4 taken along line BB.

符号の説明Explanation of symbols

１…電池
２…電極
３…金属プレート
４…本体部
５…内部溶着部
６…可撓性周壁部
７…貫通孔
８…リード部
９…電圧端子
１０…電池ブロック
１１…リード線
１２…電圧検出回路
１３…内部スリット DESCRIPTION OF SYMBOLS 1 ... Battery 2 ... Electrode 3 ... Metal plate 4 ... Main-body part 5 ... Internal weld part 6 ... Flexible surrounding wall part 7 ... Through-hole 8 ... Lead part 9 ... Voltage terminal 10 ... Battery block 11 ... Lead wire 12 ... Voltage detection Circuit 13 ... Internal slit

Claims (5)

隣接する電池(1)の電極(2)に金属プレート(3)を溶接して電池(1)を連結しているパック電池であって、
金属プレート(3)は、隣接する電池(1)に溶接して固定される本体部(4)の平面視における内部に内部溶着部(5)を設けると共に、この内部溶着部(5)の外周には、スリットである複数の貫通孔(7)を設け、該貫通孔(7)の間の金属プレート(3)をリード部(8)として、貫通孔(7)と貫通孔(7)の間のリード部(8)とからなる可撓性周壁部(6)を設けており、この可撓性周壁部(6)でもって、内部溶着部(5)を本体部(4)に対して変位できる状態で電池(1)の電極(2)に溶接して固定しているパック電池。 A battery pack in which a metal plate (3) is welded to an electrode (2) of an adjacent battery (1) to connect the battery (1),
The metal plate (3) is provided with an internal weld portion (5) in a plan view of the main body portion (4) that is welded and fixed to the adjacent battery (1), and an outer periphery of the internal weld portion (5). Is provided with a plurality of through-holes (7) as slits, and the metal plate (3) between the through-holes (7) is used as a lead portion (8), so that the through-hole (7) A flexible peripheral wall portion (6) consisting of a lead portion (8) is provided between the inner welded portion (5) and the main body portion (4). A battery pack that is welded and fixed to the electrode (2) of the battery (1) in a displaceable state. リード部(8)を湾曲するように成形している請求項１に記載されるパック電池。 The battery pack according to claim 1 , wherein the lead portion (8) is shaped to be curved. 可撓性周壁部(6)に複数の貫通孔(7)と複数のリード部(8)とを設けると共に、貫通孔(7)を内部溶着部(5)の外周に沿う方向に細長い形状のスリットとしている請求項１または２に記載されるパック電池。 The flexible peripheral wall portion (6) is provided with a plurality of through holes (7) and a plurality of lead portions (8), and the through holes (7) are elongated in the direction along the outer periphery of the inner welded portion (5). The battery pack according to claim 1 or 2 , wherein the battery pack is a slit. 本体部(4)に複数の内部溶着部(5)を設けており、各々の内部溶着部(5)が電池(1)の電極(2)に溶接されて、互いに平行な姿勢で隣接している複数の電池(1)を連結している請求項１に記載されるパック電池、 The main body (4) is provided with a plurality of internal welds (5), and each internal weld (5) is welded to the electrode (2) of the battery (1) and adjacent to each other in a parallel posture. The battery pack according to claim 1, wherein a plurality of batteries (1) connected to each other are connected. パック電池が車両用である請求項１に記載されるパック電池。 The battery pack according to claim 1, wherein the battery pack is for vehicles.
JP2004134093A 2004-04-28 2004-04-28 Pack battery Expired - Lifetime JP4683855B2 (en)

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JP2009289578A (en) * 2008-05-29 2009-12-10 Makita Corp Battery pack of electric tool
KR101198869B1 (en) * 2008-10-14 2012-11-07 주식회사 엘지화학 Connecting Member of Electrode Terminals for Preparation of Core Pack
KR20130096247A (en) * 2010-08-31 2013-08-29 파나소닉 주식회사 Assembled battery
KR102317503B1 (en) * 2015-04-09 2021-10-26 삼성에스디아이 주식회사 Battery Pack

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Publication number Priority date Publication date Assignee Title
JPH06215754A (en) * 1993-01-16 1994-08-05 Sony Corp Battery pack
JPH0817466A (en) * 1994-04-27 1996-01-19 Ngk Insulators Ltd Sodium-sulfur battery
JP2000040500A (en) * 1998-07-23 2000-02-08 Japan Storage Battery Co Ltd Terminal connector for battery
JP2005093363A (en) * 2003-09-19 2005-04-07 Kyosho Corp Battery terminal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06215754A (en) * 1993-01-16 1994-08-05 Sony Corp Battery pack
JPH0817466A (en) * 1994-04-27 1996-01-19 Ngk Insulators Ltd Sodium-sulfur battery
JP2000040500A (en) * 1998-07-23 2000-02-08 Japan Storage Battery Co Ltd Terminal connector for battery
JP2005093363A (en) * 2003-09-19 2005-04-07 Kyosho Corp Battery terminal

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