WO2007083702A1 - Connection plate for battery pack - Google Patents

Connection plate for battery pack Download PDF

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Publication number
WO2007083702A1
WO2007083702A1 PCT/JP2007/050696 JP2007050696W WO2007083702A1 WO 2007083702 A1 WO2007083702 A1 WO 2007083702A1 JP 2007050696 W JP2007050696 W JP 2007050696W WO 2007083702 A1 WO2007083702 A1 WO 2007083702A1
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WO
WIPO (PCT)
Prior art keywords
connection plate
slit
battery
battery pack
connection
Prior art date
Application number
PCT/JP2007/050696
Other languages
French (fr)
Japanese (ja)
Inventor
Yasuyuki Tsunakawa
Original Assignee
Sanoh Kogyo Kabushiki Kaisha
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanoh Kogyo Kabushiki Kaisha filed Critical Sanoh Kogyo Kabushiki Kaisha
Publication of WO2007083702A1 publication Critical patent/WO2007083702A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • 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

Definitions

  • connection plate for connecting battery cells in an assembled battery, and in particular, an improved assembled battery that is excellent in handleability and can reduce the influence of reactive current generated when the connection plate is welded.
  • Connection board
  • a battery pack in which battery cells, which are secondary battery power, are connected in series or in parallel, is widely used in various applications including electric bicycles, batteries, and hybrid vehicles.
  • battery capacity and density have been rapidly increasing.
  • connection plates are used to connect the battery cells in series or in parallel, and the connection plates are welded by resistance welding.
  • 6 and 7 show the conventional connection plates.
  • connection plate 1 indicates a connection plate
  • this connection plate 1 is a rectangular metal thin plate, and the central portion 2 rises in parallel as shown in FIG. It has a medium to high shape.
  • the slit 4 extends from the center of the short sides on both sides of the connecting plate 1 to a position reaching the central portion 2 in parallel with the long sides. Weld beads 5 are formed on both sides of these slits 4.
  • the connecting plate 1 is made of a nickel thin plate material, an iron thin plate plated with nickel, or a clad material in which a nickel thin plate is bonded to both front and back surfaces of a copper plate.
  • connection plate 1 when such a connection plate 1 is welded to the battery cell 7 by resistance welding, a current is passed while the connection plate 1 is pressed against the battery cell 7 with the welding electrode 6. Thereby, the weld bead 5 is melted by the Joule heat generated by the electric resistance, and the connection plate 1 can be welded to the battery cell 7.
  • connection plate 1 is preferably copper having a low electric resistance in view of the original function as a connection plate for a battery.
  • the connection plate 1 has proposed an assembled battery connection plate 1 as shown in FIG. 9 (Japanese Patent No. 3636603).
  • the slits 4 and 4 are lengthened, and the connection portion 8 between them is thin.
  • the slit 4 is long and the connection portion 8 is melted by an instantaneous reactive current, so that the influence of the reactive current is reduced, and the copper connection plate 1 can be stably welded.
  • connection plate 1 in FIG. 9 has the advantage that stable resistance welding can be performed while using copper as a material, but the slit 4 is long, resulting in a structure that is difficult to handle. There is a problem. In other words, in the plating process of the connection plate manufacturing process, another connection plate enters into the long slit 4 and is entangled with each other, resulting in frequent deformation and breakage such as bending and twisting.
  • the object of the present invention is to solve the problems of the prior art, reduce the effect of reactive current, perform stable welding while being a connection plate made of copper, handleability,
  • An object of the present invention is to provide an assembled battery connection plate that contributes to improvement in welding workability.
  • connection plate for connecting battery cells to each other in an assembled battery including a plurality of battery cells, the connection plate main body cover having copper as a main material.
  • the connecting plate body has a closed slit extending in the longitudinal direction, and is provided with a thin coupling portion that can be melted by an instantaneous reactive current generated during welding at both ends of the connecting plate body where the slit ends. It is characterized by this.
  • connection plate main body has two body force separated by the slit, and the thin connection portion connects both end portions of the body portion. It is characterized by being cross-linked together.
  • connection plate main body has a middle-high body having a central portion that is one step higher than both ends where the weld beads are formed.
  • the width of the center of the body of the connecting plate body may be set larger than the width of both ends where the weld beads are formed. it can.
  • connection plate at least one fine coupling portion that can be fused by an instantaneous reactive current at the time of welding is connected to the slit in the middle of the slit. It is characterized by the formation.
  • connection plate body since the slit is closed by the details of both ends of the connection plate body, there is no room for other connection plates to enter, so that deformation and breakage are prevented, and handling is easy.
  • stable welding can be performed while using copper as the material.
  • the present invention by increasing the width of the central portion of the trunk portion, the effect of lowering the electrical resistance of the current path during discharge is increased, and efficient charging / discharging becomes possible.
  • FIG. 1 is a plan view showing a first embodiment of a connection plate of a battery pack according to the present invention.
  • FIG. 2 is a side view of the connection plate of the assembled battery in FIG.
  • FIG. 3 is a plan view showing the action at the time of welding with the connection plate of the assembled battery in FIG. 1.
  • FIG. 4 is a plan view showing a modification of the connection plate of the assembled battery in FIG. 1.
  • FIG. 5 is a plan view showing a second embodiment of the connection plate of the battery pack according to the present invention.
  • FIG. 6 is a plan view showing a connection plate of a battery pack according to a conventional technique.
  • FIG. 7 is a side view of the connection plate of the battery pack of FIG.
  • FIG. 8 is a side view showing a situation when a connection plate of a conventional assembled battery is welded to a battery cell.
  • FIG. 9 is a plan view showing another example of a connection plate for a battery pack according to the prior art.
  • FIG. 1 is a plan view showing a connection plate of an assembled battery according to the first embodiment
  • FIG. 2 is a side view of the connection plate.
  • the connecting plate 10 has a middle-high shape in which the center of the body portion 11 is raised in parallel at both end portions. The width of the body of the connecting plate 10 is constant.
  • the connection plate 10 is made of copper. It should be noted that the surface of the connecting plate 10 is Ni plating-plated force. There is nothing more than this, and the copper plate itself can also be used.
  • a slit 12 is formed in the longitudinal direction along the center line of the main body of the connection plate 10.
  • the slit 12 extends parallel to the long side of the connection plate 10 and separates the body 11 into two.
  • the slit 12 extends to both ends of the main body of the connection plate 10 and stops at a position near the short side. In this way, the slit 12 is a closed slit 12, and at both ends of the connecting plate 10 where the slit 12 ends, a thin coupling portion 14 is formed to integrally bridge both ends.
  • the fine coupling portion 14 is formed to a thickness that can be melted by an instantaneous reactive current generated in the connection plate 10 during welding.
  • weld beads 5 are formed on both sides of the slit 12 on the back surface of the connecting plate 10.
  • connection plate 10 configured as described above, when the connection plate 10 is welded to the battery cell 7 by resistance welding, the welding electrode 6 is attached to the end of the connection plate 10 as shown in FIG. Current flows in the pressed state. As indicated by the arrows, an ineffective current flows through the fine coupling portions 14 formed at both ends of the connection plate 10 at the moment of energization, so that the fine coupling portions 14 are fused by heat generation. At the same time, since the weld bead 5 melts, the connection plate 10 can be welded to the battery cell 7.
  • the slit 12 blocks the reactive current, and even if the connecting plate 10 is made of copper having a small electrical resistance, it is not affected by the reactive current. Less stable welding can be realized. Actually, when the connection plate 10 of this embodiment and the conventional connection plate 1 shown in FIG. 9 were welded to the same battery cell, the same welding strength could be obtained.
  • the connecting plate 10 of the present embodiment has a structure in which the slit 12 is closed by forming the thin coupling portion 14, the following handling is possible. An advantageous effect can be obtained.
  • conventionally in the process of fitting the connecting plate, there is a problem that a long slit or other connecting plate enters and gets entangled with each other, resulting in frequent deformation and breakage such as bending and twisting.
  • the connection plate 10 of the present embodiment since the slit 12 is closed by the thin coupling portions 14 at both ends, there is no room for other connection plates to enter, so that deformation and breakage can be prevented.
  • FIG. 4 shows a modification of the connection plate 10 according to the present embodiment.
  • a thin coupling portion 15 for connecting the body portions 11 on both sides is formed in the middle of the slit 12.
  • the thin connecting portion 15 is the same as the thin connecting portion 14 in that the thin connecting portion 15 can be melted by an instantaneous reactive current during welding.
  • a thin connecting portion 15 for bridging the central portion of the trunk portion is provided, so that the rigidity of the main body of the connecting plate 10 itself is provided. Therefore, there is an advantage that deformation and breakage are less likely to occur.
  • the fine connecting portions 14 and 15 are instantaneously blown by energization during welding.
  • Fig. 4 shows an example in which only one thin connecting portion 15 is formed. The force is not limited to this, and it may be formed at multiple locations.
  • FIG. 5 is a plan view showing a connection plate of an assembled battery according to the second embodiment of the present invention.
  • the center width A of the body 11 of the connection plate body is set larger than the width B of both end portions where the weld beads 5 are formed.
  • the width A at the center of the trunk is preferably about 5 to 20% larger than the width B at both ends. Similar to the first embodiment, both ends of the body slit 12 are terminated at the thin connecting portion 14.
  • connection plate 10 of the second embodiment the effect of welding is the same as that of the first embodiment. Furthermore, according to the connection plate 10 of the second embodiment, when battery cells are connected by the connection plate 10 to form an assembled battery, the width of the body 11 is increased, so that the current path during discharge This makes it possible to charge and discharge efficiently, which greatly reduces the electrical resistance. Actually, the battery cell connected with the connection plate 10 of this embodiment (the width A of the body 11 is increased by 10%) and the battery cell connected with the connection plate 1 of FIG. As a result of measuring the resistance value in the meantime, in the connection plate 10 of this embodiment, the resistance was reduced by about 7%, and the result was obtained.
  • connection plate 10 of the second embodiment as shown in Fig. 4, the fine coupling portions 15 at both ends are supported and the thin coupling portions 15 are attached at the center.
  • connection plate 10 when the connection plate 10 is welded to form a battery pack, the battery cells are connected in series or parallel.

Abstract

A slit (12) extending in the longitudinal direction is formed in the main body of a connection plate (10) and thin coupling portions (14) which can be blown out with an instantaneous reactive current during welding work are formed at the opposite ends of the main body of the connection plate (10) where the slit (12) ends, thus forming a closed slit. Consequently, impact of the reactive current is reduced, stabilized welding is ensured even when copper is a main material, and handling performance and workability of welding are enhanced.

Description

明 細 書  Specification
組電池の接続板  Battery connection board
技術分野  Technical field
[0001] 本発明は、組電池において電池セル同士を接続する接続板に係り、特に、取扱性 に優れるとともに接続板を溶接するときに発生する無効電流の影響を少なくできるよ うに改良した組電池の接続板に関する。  TECHNICAL FIELD [0001] The present invention relates to a connection plate for connecting battery cells in an assembled battery, and in particular, an improved assembled battery that is excellent in handleability and can reduce the influence of reactive current generated when the connection plate is welded. Connection board.
背景技術  Background art
[0002] 二次電池力 なる電池セルを直列または並列につな 、だ組電池は、電動式自転車 、ノ、イブリツド車をはじめとして、さまざまな用途で広く利用されている。そして近年で は、バッテリの高容量化、高密度化が急速に進んでいる。  [0002] A battery pack in which battery cells, which are secondary battery power, are connected in series or in parallel, is widely used in various applications including electric bicycles, batteries, and hybrid vehicles. In recent years, battery capacity and density have been rapidly increasing.
[0003] この種の組電池では、電池セル同士を直列または並列に接続するために、長方形 の接続板が用いられており、この接続板を抵抗溶接により溶接している。そこで、図 6 および図 7に従来の接続板を示す。  [0003] In this type of battery pack, rectangular connection plates are used to connect the battery cells in series or in parallel, and the connection plates are welded by resistance welding. 6 and 7 show the conventional connection plates.
[0004] 図 6および図 7において、参照番号 1は接続板を示し、この接続板 1は、長方形の金 属製薄板であって、図 7に示すように、中央部 2が平行にせり上がった中高の形状に なっている。そして、接続板 1の両側短辺の中央からは、スリット 4が長辺と平行に中 央部 2に達する位置まで延びて 、る。これらのスリット 4の両側には溶接ビード 5が形 成されている。接続板 1の材質には、従来は、ニッケル薄板材、鉄の薄板にニッケル めっきを施したものや、銅板の表裏両面にニッケル薄板を接合したクラッド材等が用 いられている。  In FIG. 6 and FIG. 7, reference numeral 1 indicates a connection plate, and this connection plate 1 is a rectangular metal thin plate, and the central portion 2 rises in parallel as shown in FIG. It has a medium to high shape. The slit 4 extends from the center of the short sides on both sides of the connecting plate 1 to a position reaching the central portion 2 in parallel with the long sides. Weld beads 5 are formed on both sides of these slits 4. Conventionally, the connecting plate 1 is made of a nickel thin plate material, an iron thin plate plated with nickel, or a clad material in which a nickel thin plate is bonded to both front and back surfaces of a copper plate.
[0005] 図 8に示すように、このような接続板 1を抵抗溶接により電池セル 7に溶接する場合 、溶接電極 6で接続板 1を電池セル 7に押し付けた状態で電流を流す。これにより、 電気抵抗により発生するジュール熱により溶接ビード 5が溶け、接続板 1を電池セル 7 に溶接することができる。  As shown in FIG. 8, when such a connection plate 1 is welded to the battery cell 7 by resistance welding, a current is passed while the connection plate 1 is pressed against the battery cell 7 with the welding electrode 6. Thereby, the weld bead 5 is melted by the Joule heat generated by the electric resistance, and the connection plate 1 can be welded to the battery cell 7.
[0006] 接続板 1の材質としては、電池用の接続板としての本来の機能からいえば電気抵 抗の低い銅が好ましい。しかし、銅製の接続板を抵抗溶接するとなると、導電率の高 さという長所が逆に障害になる。 [0007] そこで、本出願人は、図 9に示すような組電池の接続板 1を提案している（特許第 3 636603号公報)。この接続板 1では、スリット 4、 4を長くして、その間の接続部 8が細 い形状になっている。この接続板 1では、スリット 4が長ぐまた瞬間的な無効電流で 接続部 8が溶断することで、無効電流の影響が少なくなり、銅製の接続板 1でも安定 した溶接が可能となった。 [0006] The material of the connection plate 1 is preferably copper having a low electric resistance in view of the original function as a connection plate for a battery. However, when resistance welding copper connection plates, the advantage of high conductivity is an obstacle. [0007] Therefore, the applicant of the present application has proposed an assembled battery connection plate 1 as shown in FIG. 9 (Japanese Patent No. 3636603). In this connection plate 1, the slits 4 and 4 are lengthened, and the connection portion 8 between them is thin. In this connection plate 1, the slit 4 is long and the connection portion 8 is melted by an instantaneous reactive current, so that the influence of the reactive current is reduced, and the copper connection plate 1 can be stably welded.
発明の開示  Disclosure of the invention
[0008] しカゝしながら、図 9の接続板 1の場合、銅を材料としながら安定した抵抗溶接が可能 となる利点がある反面、スリット 4が長くなる結果、取り扱い難い構造になっているとい う問題がある。すなわち接続板の製造過程のめっき工程などで、長いスリット 4に他の 接続板が入り込むなどして互いに絡み合ってしまい、曲がり、捻れ等の変形、破損が 多発するという問題があった。  However, the connection plate 1 in FIG. 9 has the advantage that stable resistance welding can be performed while using copper as a material, but the slit 4 is long, resulting in a structure that is difficult to handle. There is a problem. In other words, in the plating process of the connection plate manufacturing process, another connection plate enters into the long slit 4 and is entangled with each other, resulting in frequent deformation and breakage such as bending and twisting.
[0009] この点、接続部 8を無くして 2分割形状とすることが考えられる。しかし、接続板 1を 2 分割にすると、電池セル 7に溶接するときに、位置決めのセッティングに手間が力かり 、作業能率が非常に悪いという問題があり、実用性に欠ける。  In this respect, it is conceivable to eliminate the connecting portion 8 and form a two-divided shape. However, if the connecting plate 1 is divided into two parts, when welding the battery cell 7, there is a problem that the positioning setting is troublesome and the work efficiency is very poor, so that it is not practical.
[0010] そこで、本発明の目的は、前記従来技術の有する問題点を解消し、無効電流の影 響を少なくし、銅を材料とする接続板でありながら安定した溶接を行え、取り扱い性、 溶接の作業性の向上にも資するようにした組電池の接続板を提供することにある。  [0010] Therefore, the object of the present invention is to solve the problems of the prior art, reduce the effect of reactive current, perform stable welding while being a connection plate made of copper, handleability, An object of the present invention is to provide an assembled battery connection plate that contributes to improvement in welding workability.
[0011] 前記の目的を達成するために、本発明は、複数の電池セルからなる組電池におい て電池セル同士を接続する接続板であって、銅を主材料とする接続板本体カゝらなり 、前記接続板本体は、長手方向に延びる閉じたスリットを有し、前記スリットの終止す る接続板本体の両端部に、溶接時に発生する瞬間的無効電流で溶断可能な細連結 部を備えることを特徴とするものである。  [0011] In order to achieve the above object, the present invention provides a connection plate for connecting battery cells to each other in an assembled battery including a plurality of battery cells, the connection plate main body cover having copper as a main material. The connecting plate body has a closed slit extending in the longitudinal direction, and is provided with a thin coupling portion that can be melted by an instantaneous reactive current generated during welding at both ends of the connecting plate body where the slit ends. It is characterized by this.
[0012] また、本発明は、前記の接続板にお!ヽて、前記接続板本体は、前記スリットで隔て られた二つの胴部力 なり、前記細連結部は胴部の両端部同士を一体に架橋するこ とを特徴とする。  [0012] Further, according to the present invention, in the connection plate, the connection plate main body has two body force separated by the slit, and the thin connection portion connects both end portions of the body portion. It is characterized by being cross-linked together.
[0013] 本発明の好適な実施形態によれば、前記接続板本体は、溶接ビードの形成された 両端部に較べて中央部が一段高くなつた中高の胴部を有する。前記接続板本体の 胴部中央の幅は溶接ビードの形成された両端部の幅と較べて大きく設定することも できる。 [0013] According to a preferred embodiment of the present invention, the connection plate main body has a middle-high body having a central portion that is one step higher than both ends where the weld beads are formed. The width of the center of the body of the connecting plate body may be set larger than the width of both ends where the weld beads are formed. it can.
[0014] また、本発明は、前記の接続板において、前記スリットには、その中間に両側の前 記胴部を接続し、溶接時の瞬間的無効電流で溶断可能な細連結部を少なくとも 1つ 形成したことを特徴とするものである。  [0014] Further, according to the present invention, in the above connection plate, at least one fine coupling portion that can be fused by an instantaneous reactive current at the time of welding is connected to the slit in the middle of the slit. It is characterized by the formation.
[0015] 本発明によれば、スリットが接続板本体の両端部の細部で閉じて 、る形状になって いるため、他の接続板が入り込む余地がないので、変形や破損を防止し取り扱い性 を高められる上に、無効電流の影響を少なくし、銅を材質としながらも安定した溶接 を行うことが可能となる。  [0015] According to the present invention, since the slit is closed by the details of both ends of the connection plate body, there is no room for other connection plates to enter, so that deformation and breakage are prevented, and handling is easy. In addition to reducing the effect of reactive current, stable welding can be performed while using copper as the material.
[0016] また、本発明によれば、胴部中央部の幅を大きくすることにより、放電時の電流経路 の電気抵抗を下げる効果が大きくなり、効率的な充放電が可能となる。  [0016] Further, according to the present invention, by increasing the width of the central portion of the trunk portion, the effect of lowering the electrical resistance of the current path during discharge is increased, and efficient charging / discharging becomes possible.
図面の簡単な説明  Brief Description of Drawings
[0017] [図 1]図 1は、本発明による組電池の接続板の第 1の実施形態を示す平面図である。  [0017] FIG. 1 is a plan view showing a first embodiment of a connection plate of a battery pack according to the present invention.
[図 2]図 2は、図 1の組電池の接続板の側面図である。  FIG. 2 is a side view of the connection plate of the assembled battery in FIG.
[図 3]図 3は、図 1の組電池の接続板での溶接時の作用を示す平面図である。  FIG. 3 is a plan view showing the action at the time of welding with the connection plate of the assembled battery in FIG. 1.
[図 4]図 4は、図 1の組電池の接続板の変形例を示す平面図である。  FIG. 4 is a plan view showing a modification of the connection plate of the assembled battery in FIG. 1.
[図 5]図 5は、本発明による組電池の接続板の第 2の実施形態を示す平面図である。  FIG. 5 is a plan view showing a second embodiment of the connection plate of the battery pack according to the present invention.
[図 6]図 6は、従来技術に係る組電池の接続板を示す平面図である。  FIG. 6 is a plan view showing a connection plate of a battery pack according to a conventional technique.
[図 7]図 7は、図 6の組電池の接続板の側面図である。  FIG. 7 is a side view of the connection plate of the battery pack of FIG.
[図 8]図 8は、従来の組電池の接続板を電池セルに溶接するときの状況を示す側面 図である。  FIG. 8 is a side view showing a situation when a connection plate of a conventional assembled battery is welded to a battery cell.
[図 9]図 9は、従来技術に係る組電池の接続板の他の例を示す平面図である。  FIG. 9 is a plan view showing another example of a connection plate for a battery pack according to the prior art.
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0018] 以下、本発明による組電池の接続板の一実施形態について、添付の図面を参照し ながら説明する。 Hereinafter, an embodiment of an assembled battery connection plate according to the present invention will be described with reference to the accompanying drawings.
[0019] 第 1実施形態 [0019] First Embodiment
図 1は、第 1実施形態による組電池の接続板を示す平面図、図 2は同接続板の側 面図である。この接続板 10は、図 2に示すように、胴部 11の中央が両端部力も一段 平行にせり上がった中高の形状となっている。接続板 10の本体の幅は一定である。 この実施形態では、接続板 10の材質は銅が用いられている。なお、接続板 10の表 面には、 Niめっきが施されている力 これに限定されるものではなぐ何もめつきされ て!、な 、銅板自体を用いることもできる。 FIG. 1 is a plan view showing a connection plate of an assembled battery according to the first embodiment, and FIG. 2 is a side view of the connection plate. As shown in FIG. 2, the connecting plate 10 has a middle-high shape in which the center of the body portion 11 is raised in parallel at both end portions. The width of the body of the connecting plate 10 is constant. In this embodiment, the connection plate 10 is made of copper. It should be noted that the surface of the connecting plate 10 is Ni plating-plated force. There is nothing more than this, and the copper plate itself can also be used.
[0020] 接続板 10の本体の中心線上にそって長手方向にスリット 12が形成されている。こ のスリット 12は、接続板 10の長辺と平行に延びて、胴部 11を 2つに隔てている。そし て、このスリット 12は、接続板 10の本体の両端部まで延び、短辺に近い位置で終止 するようになつている。このようにしてスリット 12は、閉じたスリット 12になっており、スリ ット 12の終止する接続板 10の両端部には、両端部を一体に架橋する細連結部 14が 形成されている。この細連結部 14は、溶接時に接続板 10に発生する瞬間的無効電 流で溶断可能な細さに形成されている。なお、図 1、 2において、接続板 10の裏面に はスリット 12の両側に溶接ビード 5が形成されて 、る。  A slit 12 is formed in the longitudinal direction along the center line of the main body of the connection plate 10. The slit 12 extends parallel to the long side of the connection plate 10 and separates the body 11 into two. The slit 12 extends to both ends of the main body of the connection plate 10 and stops at a position near the short side. In this way, the slit 12 is a closed slit 12, and at both ends of the connecting plate 10 where the slit 12 ends, a thin coupling portion 14 is formed to integrally bridge both ends. The fine coupling portion 14 is formed to a thickness that can be melted by an instantaneous reactive current generated in the connection plate 10 during welding. In FIGS. 1 and 2, weld beads 5 are formed on both sides of the slit 12 on the back surface of the connecting plate 10.
[0021] 以上のように構成される接続板 10によれば、接続板 10を抵抗溶接により電池セル 7に溶接する場合、図 3に示すように、溶接電極 6を接続板 10の端部に押し付けた状 態で電流を流す。矢印で記すように、接続板 10の両端部に形成されている細連結部 14には、通電の瞬間に無効電流が流れるので、発熱により細連結部 14は溶断され る。そして同時に、溶接ビード 5が溶融するので、接続板 10を電池セル 7に溶接する ことができる。このように細連結部 14は、瞬間的に溶断してしまうので、スリット 12が無 効電流を遮断し、電気抵抗の小さな銅を材質とする接続板 10であっても、無効電流 による影響を少なくして安定した溶接を実現することができる。実際、本実施形態の 接続板 10と図 9に示した従来の接続板 1とを同じ電池セルに溶接したところ、同等の 溶接強度を得ることができた。  According to the connection plate 10 configured as described above, when the connection plate 10 is welded to the battery cell 7 by resistance welding, the welding electrode 6 is attached to the end of the connection plate 10 as shown in FIG. Current flows in the pressed state. As indicated by the arrows, an ineffective current flows through the fine coupling portions 14 formed at both ends of the connection plate 10 at the moment of energization, so that the fine coupling portions 14 are fused by heat generation. At the same time, since the weld bead 5 melts, the connection plate 10 can be welded to the battery cell 7. In this way, since the thin coupling portion 14 is instantaneously melted, the slit 12 blocks the reactive current, and even if the connecting plate 10 is made of copper having a small electrical resistance, it is not affected by the reactive current. Less stable welding can be realized. Actually, when the connection plate 10 of this embodiment and the conventional connection plate 1 shown in FIG. 9 were welded to the same battery cell, the same welding strength could be obtained.
[0022] し力も、本実施形態の接続板 10では、細連結部 14を形成したことによってスリット 1 2を閉じたスリットとなる構造をもって 、るので、次のような取り扱 、の面での有利な効 果が得られる。すなわち、従来、接続板をめつきをする工程などでは、長いスリット〖こ 他の接続板が入り込むなどして互いに絡み合ってしまい、曲がり、捻れ等の変形、破 損が多発するという問題があつたが、本実施形態の接続板 10では、スリット 12が両端 部の細連結部 14で閉じている形状になっているため、他の接続板が入り込む余地が ないので、変形や破損を防止できる。 [0023] 次に、図 4は、本実施形態による接続板 10の変形例を示す。この図 4の接続板 10 では、スリット 12の中間には両側の胴部 11を接続する細連結部 15が形成されて 、る 。なお、細連結部 15は、溶接時の瞬間的無効電流で溶断可能である点は細連結部 14と同様である。 [0022] Since the connecting plate 10 of the present embodiment has a structure in which the slit 12 is closed by forming the thin coupling portion 14, the following handling is possible. An advantageous effect can be obtained. In other words, conventionally, in the process of fitting the connecting plate, there is a problem that a long slit or other connecting plate enters and gets entangled with each other, resulting in frequent deformation and breakage such as bending and twisting. However, in the connection plate 10 of the present embodiment, since the slit 12 is closed by the thin coupling portions 14 at both ends, there is no room for other connection plates to enter, so that deformation and breakage can be prevented. Next, FIG. 4 shows a modification of the connection plate 10 according to the present embodiment. In the connecting plate 10 of FIG. 4, a thin coupling portion 15 for connecting the body portions 11 on both sides is formed in the middle of the slit 12. The thin connecting portion 15 is the same as the thin connecting portion 14 in that the thin connecting portion 15 can be melted by an instantaneous reactive current during welding.
[0024] この接続板 10では、両端部にある細連結部 14に加えて、胴部の中央部を架橋す る細連結部 15を付けカ卩えているため、接続板 10の本体自体の剛性を高めることがで きるので、変形、破損がより生じ難くなる利点がある。なお、溶接時の通電によって、 これらの細連結部 14、 15は瞬間的に溶断する点は上述した通りである。なお、図 4 は、細連結部 15を 1つだけ形成した例である力 これに限定されるものではなぐ複 数箇所に形成するようにしてもょ ヽ。  [0024] In this connecting plate 10, in addition to the thin connecting portions 14 at both ends, a thin connecting portion 15 for bridging the central portion of the trunk portion is provided, so that the rigidity of the main body of the connecting plate 10 itself is provided. Therefore, there is an advantage that deformation and breakage are less likely to occur. Note that, as described above, the fine connecting portions 14 and 15 are instantaneously blown by energization during welding. Note that Fig. 4 shows an example in which only one thin connecting portion 15 is formed. The force is not limited to this, and it may be formed at multiple locations.
[0025] 第 2実施形態  [0025] Second Embodiment
次に、本発明の第 2実施形態による組電池の接続板について図 5を参照して説明 する。  Next, an assembled battery connection plate according to a second embodiment of the present invention will be described with reference to FIG.
[0026] 図 5は、本発明の第 2実施形態による組電池の接続板を示す平面図である。この第 2実施形態の接続板 10では、接続板本体の胴部 11の中央の幅 Aが溶接ビード 5の 形成されている両端部分の幅 Bと較べて大きく設定されている。この胴部中央の幅 A は、両端部分の幅 Bに較べて 5〜20%程度大きいことが好ましい。胴部スリット 12の 両端は細連結部 14で終止している点は第 1実施形態と同様である。  FIG. 5 is a plan view showing a connection plate of an assembled battery according to the second embodiment of the present invention. In the connection plate 10 of the second embodiment, the center width A of the body 11 of the connection plate body is set larger than the width B of both end portions where the weld beads 5 are formed. The width A at the center of the trunk is preferably about 5 to 20% larger than the width B at both ends. Similar to the first embodiment, both ends of the body slit 12 are terminated at the thin connecting portion 14.
[0027] この第 2実施形態の接続板 10によれば、溶接での作用効果は第 1実施形態と同様 である。さら〖こ、第 2実施形態の接続板 10によれば、電池セルを接続板 10で接続し て組電池とした場合に、胴部 11の幅が大きくなつているため、放電時の電流経路の 電気抵抗を下げる効果が大きぐ効率的な充放電が可能となる。実際、本実施形態 の接続板 10で電池セルを接続したもの (胴部 11の幅 Aを 1割増し)と、図 9の接続板 1で電池セルを接続したものとで、同じ条件で 2セル間の抵抗値を測定したところ、本 実施形態の接続板 10では、 7%程度抵抗が減少して 、ると 、う結果が得られた。  [0027] According to the connection plate 10 of the second embodiment, the effect of welding is the same as that of the first embodiment. Furthermore, according to the connection plate 10 of the second embodiment, when battery cells are connected by the connection plate 10 to form an assembled battery, the width of the body 11 is increased, so that the current path during discharge This makes it possible to charge and discharge efficiently, which greatly reduces the electrical resistance. Actually, the battery cell connected with the connection plate 10 of this embodiment (the width A of the body 11 is increased by 10%) and the battery cell connected with the connection plate 1 of FIG. As a result of measuring the resistance value in the meantime, in the connection plate 10 of this embodiment, the resistance was reduced by about 7%, and the result was obtained.
[0028] なお、この第 2実施形態の接続板 10において、図 4に示したように、両端部にある 細連結部 14にカ卩えて、中央部に細連結部 15を付けカ卩えるようにしてもょ 、。  [0028] In the connection plate 10 of the second embodiment, as shown in Fig. 4, the fine coupling portions 15 at both ends are supported and the thin coupling portions 15 are attached at the center. Anyway.
[0029] 以上、本発明に係る溶接方法について、好適な実施形態を挙げて説明したが、本 発明では、接続板 10を溶接し組電池にする場合、電池セルの直列接続、並列接続As described above, the welding method according to the present invention has been described with reference to the preferred embodiment. In the invention, when the connection plate 10 is welded to form a battery pack, the battery cells are connected in series or parallel.
、直列と並列の組み合わせの 、ずれにも利用できることはもちろんである。 Of course, the combination of series and parallel can also be used for deviation.

Claims

請求の範囲 The scope of the claims
[1] 複数の電池セル力 なる組電池にぉ 、て電池セル同士を接続する接続板であって 銅を主材料とする接続板本体からなり、前記接続板本体は、長手方向に延びる閉 じたスリットを有し、前記スリットの終止する接続板本体の両端部に、溶接時に発生す る瞬間的無効電流で溶断可能な細連結部を備えることを特徴とする組電池の接続板  [1] A connection plate for connecting battery cells to an assembled battery having a plurality of battery cell forces, comprising a connection plate main body mainly composed of copper, and the connection plate main body is closed in a longitudinal direction. A connecting plate for a battery pack, comprising: a thin connecting portion that can be melted by an instantaneous reactive current generated at the time of welding at both ends of the connecting plate body where the slit ends.
[2] 前記接続板本体は、前記スリットで隔てられた二つの胴部からなり、前記細連結部 は胴部の両端部同士を一体に架橋することを特徴とする請求項 1に記載の組電池の 接続板。 [2] The set according to claim 1, wherein the connecting plate body includes two body parts separated by the slit, and the thin coupling part integrally bridges both end parts of the body part. Battery connection board.
[3] 前記接続板本体は、溶接ビードの形成された両端部に較べて中央部が一段高くな つた中高の胴部を有すること特徴とする請求項 2に記載の組電池の接続板。  [3] The battery pack connection plate according to claim 2, wherein the connection plate main body has a middle-high body having a central portion that is one step higher than both end portions where weld beads are formed.
[4] 前記接続板本体は、一定の幅を有することを特徴とする請求項 2に記載の組電池 の接続板。  [4] The battery pack connection plate according to claim 2, wherein the connection plate body has a certain width.
[5] 前記接続板本体の胴部中央の幅を溶接ビードの形成された両端部の幅と較べて 大きく設定したことを特徴とする請求項 2に記載の組電池の接続板。  5. The battery pack connection plate according to claim 2, wherein a width of a center portion of the body portion of the connection plate body is set larger than a width of both end portions where weld beads are formed.
[6] 前記スリットには、その中間に両側の前記胴部を接続し、溶接時の瞬間的無効電 流で溶断可能な細連結部を少なくとも 1つ形成したことを特徴とする請求項 4または 5 に記載の組電池の接続板。 6. The slit is characterized in that at least one fine coupling portion that can be melted by an instantaneous reactive current during welding is formed in the slit by connecting the body portions on both sides. 5. The battery pack connection plate described in 5.
[7] 前記接続板本体は、表面にめっきの施されて 、な 、銅板力もなることを特徴とする 請求項 1乃至 6のいずれかの項に記載の組電池の接続板。 7. The battery pack connection plate according to any one of claims 1 to 6, wherein the connection plate body is plated on the surface and has a copper plate force.
[8] 前記接続板本体の表面には、 Niめっきが施されたことを特徴とする請求項 1乃至 6 の!、ずれかの項に記載の組電池の接続板。 [8] The assembled battery connection plate according to any one of claims 1 to 6, wherein the surface of the connection plate body is Ni-plated.
PCT/JP2007/050696 2006-01-18 2007-01-18 Connection plate for battery pack WO2007083702A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2843731A3 (en) * 2013-08-27 2015-04-22 Samsung SDI Co., Ltd. Battery module
CN105598567A (en) * 2016-03-03 2016-05-25 合肥国轩高科动力能源有限公司 Battery connection pole piece manufacturing method
WO2018215131A1 (en) * 2017-05-24 2018-11-29 Robert Bosch Gmbh Arrester element for an electrode assembly of a plurality of electrochemical cells

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5115696B2 (en) 2007-05-16 2013-01-09 ソニー株式会社 Battery pack
JP5200420B2 (en) 2007-05-16 2013-06-05 ソニー株式会社 Battery pack
JP5141090B2 (en) 2007-05-16 2013-02-13 ソニー株式会社 Battery pack
JP5119735B2 (en) 2007-05-16 2013-01-16 ソニー株式会社 Battery pack
JP5205805B2 (en) * 2007-05-16 2013-06-05 ソニー株式会社 Battery pack
EP2448039A4 (en) * 2010-07-15 2012-06-20 Panasonic Corp Method for manufacturing assembled battery, and assembled battery
JP5622676B2 (en) * 2011-07-13 2014-11-12 日本アビオニクス株式会社 Battery and tab connection method and tab
JP5930368B2 (en) * 2011-12-16 2016-06-08 株式会社Ｇｓユアサ Power storage device and bus bar used for power storage device
US9553294B2 (en) 2011-12-16 2017-01-24 Gs Yuasa International Ltd. Electric storage device, manufacturing method of electric storage device, and bus bar used for electric storage device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5717067U (en) * 1980-07-03 1982-01-28
JPS61281457A (en) * 1985-09-13 1986-12-11 Sanyo Electric Co Ltd Manufacture of storage battery
JPH0714569A (en) * 1993-06-24 1995-01-17 Yuasa Corp Current collecting terminal and manufacture of storage battery using same
JP2000106170A (en) * 1998-09-29 2000-04-11 Sanoh Industrial Co Ltd Connecting plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5717067U (en) * 1980-07-03 1982-01-28
JPS61281457A (en) * 1985-09-13 1986-12-11 Sanyo Electric Co Ltd Manufacture of storage battery
JPH0714569A (en) * 1993-06-24 1995-01-17 Yuasa Corp Current collecting terminal and manufacture of storage battery using same
JP2000106170A (en) * 1998-09-29 2000-04-11 Sanoh Industrial Co Ltd Connecting plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2843731A3 (en) * 2013-08-27 2015-04-22 Samsung SDI Co., Ltd. Battery module
CN105598567A (en) * 2016-03-03 2016-05-25 合肥国轩高科动力能源有限公司 Battery connection pole piece manufacturing method
WO2018215131A1 (en) * 2017-05-24 2018-11-29 Robert Bosch Gmbh Arrester element for an electrode assembly of a plurality of electrochemical cells

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