JP5019679B2 - Battery manufacturing method - Google Patents

Battery manufacturing method Download PDF

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Publication number
JP5019679B2
JP5019679B2 JP2001215727A JP2001215727A JP5019679B2 JP 5019679 B2 JP5019679 B2 JP 5019679B2 JP 2001215727 A JP2001215727 A JP 2001215727A JP 2001215727 A JP2001215727 A JP 2001215727A JP 5019679 B2 JP5019679 B2 JP 5019679B2
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Japan
Prior art keywords
lead
assembly
battery
insulating sheet
piece
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Expired - Fee Related
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JP2001215727A
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Japanese (ja)
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JP2003031193A (en
Inventor
雅光 殿西
稔 青山
健次 藪野
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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Priority to JP2001215727A priority Critical patent/JP5019679B2/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Description

【0001】
【発明の属する技術分野】
本発明は、電池本体の外側に一対の電流取り出し部を設けた電池及びその製造方法に関する。
【0002】
【従来の技術】
例えば角形のリチウムイオン電池では、次のような構造が知られている。すなわち、扁平な箱形をなす金属製の電池缶内に発電要素が収容されて電池本体が構成される。その電池本体には外面に沿わせてリード片が設けられており、電池本体の一側面には正負一対の電流取り出し部が突設されている。このような電池の製造方法は具体的には図7に示すようである。まず、電池本体1の側面部に絶縁シート2を接着してここにPTC等の保護素子3を溶接により接続した負極リード片4をさらに接着する。そして、保護素子3の端部を電池本体1の負の電極部1N側の端面に折り曲げてその電極部1Nに溶接し、負極リード片4の反対側は正の電極部1P側の端面に折り曲げて接着剤により絶縁シートに接着しておく。なお、この負極リード片4の端部には、負極側電流取り出し部4Nが折り曲げ形成してある。一方、正極側は電流取り出し部5Pを備えた正極リード5が電池本体1の正の電極部1Pに溶接により固定される。すると、その完成形態が図7(B)に示すようになる。
【0003】
【発明が解決しようとする課題】
ところが、以上のような構成では数多くの部品を電池本体に対して順次組み付けなくてはならず、組立工数が増大してコスト高となるだけではなく、組み付け精度を高くできず組立不良の原因となるという問題があった。
【0004】
本発明は上記のような事情に基づいて完成されたものであって、電池本体への組み付け工数を減らすことができ、また、組み付け精度を高めることができる電池及びその製造方法を提供することを目的とする。
【0007】
請求項の発明は、発電要素を内部に収容した電池本体の外面に絶縁シートを介してリード片を沿わせ、前記電池本体にその電極部に連なる正負一対の電流取り出しリード部を設けてなる電池の製造方法であって、前記リード片及び前記一対の電流取り出し部を前記絶縁シートに共に予め一体化してリードアッセンブリを形成し、その後、そのリードアッセンブリの前記リード片を前記電池本体の電極部に接続し、一対の電流取り出し部は、リードアッセンブリの形成前には切断可能部を介して一連に
連なっており、前記絶縁シートに貼り付けた後に前記切断可能部を切り落とすことにより前記絶縁シートを介して連なりながら電気的には独立させた形態とするところに特徴を有する。
【0008】
そして、請求項の発明は、請求項に記載の製造方法において、リードアッセンブリの前記リード片に、電流遮断用の保護素子を予め一体化しておくところに特徴を有する。
【0010】
発明によれば、予めリード片が一体化されたリードアッセンブリを形成するから、電池本体に対しては一体化されたリードアッセンブリという単一の部品を取り付けるという作業のみで済み、組立工程の工数が大幅に削減できる。また、主要部品を別工程で一体化してリードアッセンブリを製造するから、精度を向上させることができ、そのために組み付け位置のバラツキが減少して組立不良を削減することができる。
【0011】
また、発明によれば、電流遮断用の保護素子を予め一体化するから、部品点数・組立工数が一層削減され、不良率もさらに低下させることができる。
【0012】
そして、発明によれば、本来、電気的には分離していなくてはならない正負のリード片もリードアッセンブリの形で一体化して扱うことができ、部品点数・組み立て工数のさらなる削減が可能になる。
【0013】
【発明の実施の形態】
<第1実施形態>
本発明の第1実施形態を図1ないし図4によって説明する。
図1(B)は本実施形態に係る電池の完成形態を示し、扁平な箱形をなす電池本体10の側面部にリードアッセンブリ20が取り付けられ、その電池本体10の一端面からリードアッセンブリ20に設けた一対の電流取り出しリード部31,32が突設された形態である。電池本体10は例えばリチウムイオンタイプの二次電池であり、例えばアルミニウム製の扁平角形の電池缶内に周知の発電要素が収容されており、その両端面部に正の電極部11及び負の電極部12が設けられている。
【0014】
この電池の組立前の状態は図1(A)に示すようであり、前述した電池本体10とリードアッセンブリ20との2部品からなる。リードアッセンブリ20は、図2〜図4に示すように製造されたものである。
例えばニッケルの薄板から周知の順送プレス方式により所定形状のリード素片21が打ち抜かれる。このリード素片21は、長い帯状をなすマイナスリード主体部21Aと、短い帯状をなすプラスリード主体部21Bとを備えており、両リード主体部21A,21B間に位置する連結部21Cにより一体的に連続している。この連結部21Cには特にこの実施形態では横に長いスリット21Dが形成され、これにより両リード主体部21A,21Bがスリット21Dの両側に位置する細幅の切断可能部21E,21Fを介して連続した形態となっている(図2(B)参照)。また、マイナスリード主体部21Aの連結部21C側の端部には前記電流取り出しリード部31が下向きに延設され、プラスリード主体部21Bの連結部21C側とは反対側に前記電流取り出しリード部32が下向きに延設されている。
【0015】
また、このリード素片21には電流遮断用の保護素子としての例えばPTC素子22が接続される。このPTC素子22の一方のリード部22Aがリード素片21のマイナスリード主体部21Aの端部に例えば抵抗溶接或いは超音波溶接により接続されることで両者が一体化されるのである。
【0016】
一方、2枚の同一形状の絶縁テープ23(絶縁シートに相当する)が準備される。これは上記リード素片21のマイナスリード主体部21AやPTC素子22の幅寸法よりも僅かに広い幅寸法を有すると共に、PTC素子22を含めたリード素片21の全長よりも僅かに短い長さ寸法であり、リード素片21及びPTC素子22を両側から挟み付けて、図3に示すように、両端からPTC素子22の他方のリード部22Bと、プラスリード主体部21Bの端部のみが露出した形態となる。
【0017】
なお、両絶縁テープ23の合わせ面(リード素片21側の面)のみには予め例えば感熱性接着剤が塗布してあり、PTC素子22及びリード素片21を挟んで加熱することにより両絶縁テープ23が互いに或いはリード素片21等に接着して一体化されている。また、両絶縁テープ23のうちプラスリード主体部21Bに対応する部分には、溶接用窓部23Aが開口形成されており、リード素片21を挟み付けた状態でその一部が溶接用窓部23Aを通して露出している(図3(B)参照)。
【0018】
そして、以上のように製造されたリードアッセンブリ20は、次にリード素片21の切断可能部21E,21F部分にそれぞれプレス孔24が形成される(図4参照)。このプレス孔24は、絶縁テープ23の幅寸法よりも小さく、かつ、リード素片21の切断可能部21E,21Fの上下方向長さよりも大きな寸法である。これにより、切断可能部21E,21Fがリード素片21から除去され、マイナスリード主体部21Aとプラスリード主体部21Bとが分断されて電気的に独立する。この状態でも2枚の絶縁テープ23は、互いに、或いはマイナスリード主体部21Aやプラスリード主体部21Bに接着しているから、リードアッセンブリ20の一体化状態に変化はなく、依然として単一の部品として扱うことができる。なお、このようなプレス孔24の形成による分断工程は順送プレス工程の中で実行され、マイナスリード主体部21Aとプラスリード主体部21Bとが分断されて電気的に独立しつつ絶縁テープ23により一体化されたリードアッセンブリ20が完成した後に、個片として切り離される。
【0019】
次に、図1に示すように、このリードアッセンブリ20を電池本体10の側面部に巻き付けるように宛い、リードアッセンブリ20の端部から露出するPTC素子22のリード部22Bを電池本体10の電極部12に例えば抵抗溶接或いは超音波溶接にて接続し、反対側のプラスリード主体部21Bの端部は電池本体10の電極部11にやはり抵抗溶接や超音波溶接によって接続する。なお、このときプラスリード主体部21Bの溶接は、絶縁テープ23に形成した溶接用窓部23Aを通して溶接電極又は溶接ホーンをプラスリード主体部21Bに押し当てることで可能である。
これにて、リードアッセンブリ20が電池本体10に2カ所で固定されることになり、電池の組立が完了する。
【0020】
このように本実施形態によれば、マイナスリード主体部21A、プラスリード主体部21B及びPTC素子22を予め一体化したリードアッセンブリ20を製造し、これを1部品として取り扱って電池本体10の2カ所に接続すればよいから、電池の組立工数を大幅に削減することができる。また、リードアッセンブリ20は電池本体10への接続とは異なる別工程で一体化するものであるから、各構成部品の組み付け位置を高精度に決めることができ、この結果、バラツキが減少して組立不良を削減することができる。しかも、特に本実施形態では、PTC素子22を予め一体化するから、部品点数・組立工数が一層削減され、不良率もさらに低下させることができる。また、マイナスリード主体部21Aとプラスリード主体部21Bとをリード素片21の形で一体化して扱い、リードアッセンブリ20とした後に両者を分断するから、部品点数・組み立て工数のさらなる削減が可能であり、かつ、位置精度がより高くなる。
【0021】
<第2実施形態>
図5は本発明の第2実施形態を示す。前記第1実施形態との相違は、PTC素子22を備えていないところにあり、その他は第1実施形態と同様であるから、同一部分に同一符号を付して重複する説明を省略する。
【0022】
このような構成としても、上記実施形態と同様な効果が得られることはもちろんである。
【0023】
<第3実施形態>
図6は本発明の第3実施形態を示す。前記第1実施形態との相違は、マイナスリード主体部21Aとプラスリード主体部21Bとが一体化されておらず、2本のリード片21A,21Bとして独立しているところにある。その他の構成は第1実施形態と同様であるから、同一部分に同一符号を付して重複する説明を省略する。
【0024】
このような構成としても、リードアッセンブリ20としてマイナスリード主体部21A、プラスリード主体部21B及びPTC素子22を予め単一部品化できるから、部品点数の削減及び電池本体10への組み付けの工数削減、並びに位置精度の向上による不良率低減等の優れた効果が得られる。
【0025】
<他の実施形態>
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。
【0026】
(1)上記各実施形態では、2枚の絶縁テープ23を使用してリードアッセンブリ20を構成するようにしたから、リード主体部21A,21B等が露出しないようにできるが、これに限らず、電池本体10の側の絶縁テープ23のみを使用してリードアッセンブリ20を構成するようにしてもよい。
【0027】
(2)上記各実施形態では、切断可能部21E,21Fを2カ所に設けたが、これは1カ所であっても良く、また、ここを分離するためのプレス孔は円形に限らず、矩形であってもよい。さらには、切断可能部を分離するにはプレスによらずとも、例えばレーザ照射によって切断分離してもよく、要は、マイナスリード主体部21Aとプラスリード主体部21Bとがリードアッセンブリ20の形成前には切断可能部21E,21Fを介して一連に連なっており、絶縁テープ23と一体化した後に切断可能部21E,21Fを切り落とすことにより電気的に独立させるようにすれば、製造工程が最も合理的になるという効果が得られる。
【0028】
(3)上記実施形態では、絶縁テープ23を感熱性接着剤により貼り付けたが、これに限られず、粘着性の両面テープ、嫌気性や二液混合性の接着剤を使用してもよい。
【図面の簡単な説明】
【図1】本発明の第1実施形態に係る組立工程の斜視図であり、(A)は組立前、(B)は組立後を示す。
【図2】リードアッセンブリの製造過程を示す斜視図であり、(A)は全体図,(B)は一部の拡大図を示す。
【図3】リードアッセンブリの製造過程を示す斜視図であり、(A)は全体図,(B)は一部の拡大図を示す。
【図4】リードアッセンブリの完成形態を示す斜視図であり、(A)は全体図,(B)は一部の拡大図を示す。
【図5】本発明の第2実施形態に係る組立工程の斜視図であり、(A)は組立前、(B)は組立後を示す。
【図6】本発明の第3実施形態に係る組立工程の斜視図であり、(A)は全体図,(B)は一部の拡大図を示す。
【図7】従来例を示す斜視図であり、(A)は組立前、(B)は組立後を示す。
【符号の説明】
10…電池本体
11…電極部
12…電極部
20…リードアッセンブリ
21…リード素片
21E,21F…切断可能部
22…PTC素子(保護素子)
23…絶縁テープ(絶縁シート)
31、32…電流取り出しリード部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery in which a pair of current extraction portions are provided outside a battery body, and a method for manufacturing the battery.
[0002]
[Prior art]
For example, a prismatic lithium ion battery has the following structure. In other words, the power generation element is housed in a metal battery can having a flat box shape to constitute a battery body. A lead piece is provided along the outer surface of the battery main body, and a pair of positive and negative current extraction portions project from one side surface of the battery main body. A specific method of manufacturing such a battery is as shown in FIG. First, the insulating sheet 2 is bonded to the side surface portion of the battery body 1, and the negative electrode lead piece 4 to which the protective element 3 such as PTC is connected by welding is further bonded. Then, the end portion of the protective element 3 is bent to the end surface on the negative electrode portion 1N side of the battery body 1 and welded to the electrode portion 1N, and the opposite side of the negative electrode lead piece 4 is bent to the end surface on the positive electrode portion 1P side. Adhere to the insulating sheet with an adhesive. Note that a negative-electrode-side current extraction portion 4N is bent at the end of the negative-electrode lead piece 4. On the other hand, on the positive electrode side, the positive electrode lead 5 having the current extraction portion 5P is fixed to the positive electrode portion 1P of the battery body 1 by welding. Then, the completed form is as shown in FIG.
[0003]
[Problems to be solved by the invention]
However, in the configuration as described above, a large number of parts must be sequentially assembled to the battery body, which not only increases the number of assembly steps and increases the cost, but also increases assembly accuracy and causes assembly failure. There was a problem of becoming.
[0004]
The present invention has been completed based on the above-described circumstances, and can provide a battery that can reduce the number of steps for assembling the battery body and can increase the assembling accuracy, and a method for manufacturing the same. Objective.
[0007]
According to the first aspect of the present invention, a lead piece is provided along an outer surface of a battery main body in which a power generating element is accommodated via an insulating sheet, and a pair of positive and negative current extraction lead portions connected to the electrode portion is provided on the battery main body. A method of manufacturing a battery, wherein the lead piece and the pair of current extraction portions are integrated together in advance with the insulating sheet to form a lead assembly, and then the lead piece of the lead assembly is connected to an electrode portion of the battery body. The pair of current extraction parts are connected in series through the severable part before the lead assembly is formed.
It is characterized in that it is electrically connected while being connected via the insulating sheet by cutting off the severable portion after being attached to the insulating sheet.
[0008]
The invention of claim 2 is characterized in that, in the manufacturing method of claim 1 , a protection element for interrupting current is integrated in advance with the lead piece of the lead assembly.
[0010]
According to the present invention, since the lead assembly in which the lead pieces are integrated in advance is formed, it is only necessary to attach a single component called the integrated lead assembly to the battery body, and the number of steps in the assembly process Can be greatly reduced. In addition, since the lead parts are manufactured by integrating the main parts in separate processes, the accuracy can be improved, and as a result, variations in the assembly position can be reduced and assembly defects can be reduced.
[0011]
In addition, according to the present invention, since the protection element for current interruption is integrated in advance, the number of parts and the number of assembly steps can be further reduced, and the defect rate can be further reduced.
[0012]
According to the present invention, positive and negative lead pieces, which must be electrically separated from each other, can be integrated and handled in the form of a lead assembly, further reducing the number of parts and the number of assembly steps. Become.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
<First Embodiment>
A first embodiment of the present invention will be described with reference to FIGS.
FIG. 1B shows a completed battery according to the present embodiment, in which a lead assembly 20 is attached to a side surface portion of the battery body 10 having a flat box shape, and the lead assembly 20 is attached to one end face of the battery body 10. A pair of provided current extraction lead portions 31 and 32 is provided in a protruding manner. The battery body 10 is, for example, a lithium ion type secondary battery. For example, a well-known power generation element is accommodated in a flat rectangular battery can made of aluminum, and a positive electrode portion 11 and a negative electrode portion are formed at both end portions thereof. 12 is provided.
[0014]
The state before the battery is assembled is as shown in FIG. 1A, and consists of two parts, the battery body 10 and the lead assembly 20 described above. The lead assembly 20 is manufactured as shown in FIGS.
For example, a lead element 21 having a predetermined shape is punched from a thin nickel plate by a known progressive press method. The lead piece 21 includes a negative lead main body portion 21A having a long belt shape and a positive lead main body portion 21B having a short belt shape, and is integrally formed by a connecting portion 21C positioned between both lead main body portions 21A and 21B. It is continuous. In this embodiment, in particular, in this embodiment, a long slit 21D is formed in the connecting portion 21C, whereby both lead main portions 21A and 21B are continuously connected via narrow cuttable portions 21E and 21F located on both sides of the slit 21D. (See FIG. 2B). Further, the current extraction lead portion 31 extends downward at the end of the minus lead main portion 21A on the connecting portion 21C side, and the current extraction lead portion on the opposite side of the plus lead main portion 21B from the connection portion 21C side. 32 is extended downward.
[0015]
Further, for example, a PTC element 22 as a current interrupting protective element is connected to the lead piece 21. One lead portion 22A of the PTC element 22 is connected to the end portion of the minus lead main portion 21A of the lead piece 21 by, for example, resistance welding or ultrasonic welding, so that both are integrated.
[0016]
On the other hand, two insulating tapes 23 having the same shape (corresponding to insulating sheets) are prepared. This has a width dimension slightly larger than the width dimension of the minus lead main portion 21A of the lead piece 21 and the PTC element 22, and a length slightly shorter than the total length of the lead piece 21 including the PTC element 22. 3 and sandwiching the lead element 21 and the PTC element 22 from both sides, as shown in FIG. 3, only the other lead part 22B of the PTC element 22 and the end part of the plus lead main part 21B are exposed from both ends. It will be in the form.
[0017]
In addition, for example, a heat-sensitive adhesive is applied in advance only to the mating surface (the surface on the lead piece 21 side) of both insulating tapes 23, and both insulation is achieved by heating the PTC element 22 and the lead piece 21 between them. The tapes 23 are integrated with each other or with the lead piece 21 or the like. In addition, a welding window portion 23A is formed in a portion corresponding to the plus lead main body portion 21B of both insulating tapes 23, and a part of the welding window portion is sandwiched with the lead piece 21 sandwiched therebetween. It is exposed through 23A (see FIG. 3B).
[0018]
In the lead assembly 20 manufactured as described above, press holes 24 are then formed in the cutable portions 21E and 21F of the lead piece 21, respectively (see FIG. 4). The press hole 24 is smaller than the width of the insulating tape 23 and larger than the vertical length of the cutable portions 21E and 21F of the lead piece 21. As a result, the breakable portions 21E and 21F are removed from the lead piece 21, and the minus lead main portion 21A and the plus lead main portion 21B are separated and electrically independent. Even in this state, since the two insulating tapes 23 are bonded to each other or to the minus lead main body 21A and the plus lead main body 21B, there is no change in the integrated state of the lead assembly 20, and it remains as a single component. Can be handled. The dividing process by forming the press hole 24 is performed in the progressive pressing process, and the minus lead main part 21A and the plus lead main part 21B are divided and electrically isolated by the insulating tape 23. After the integrated lead assembly 20 is completed, the lead assembly 20 is separated into individual pieces.
[0019]
Next, as shown in FIG. 1, the lead assembly 20 is wound around the side surface portion of the battery body 10, and the lead portion 22B of the PTC element 22 exposed from the end portion of the lead assembly 20 is connected to the electrode of the battery body 10. For example, resistance welding or ultrasonic welding is connected to the part 12, and the end of the positive lead main part 21 </ b> B on the opposite side is also connected to the electrode part 11 of the battery body 10 by resistance welding or ultrasonic welding. At this time, the plus lead main part 21B can be welded by pressing a welding electrode or a welding horn against the plus lead main part 21B through a welding window 23A formed on the insulating tape 23.
As a result, the lead assembly 20 is fixed to the battery body 10 at two locations, and the assembly of the battery is completed.
[0020]
As described above, according to the present embodiment, the lead assembly 20 in which the minus lead main portion 21A, the plus lead main portion 21B, and the PTC element 22 are integrated in advance is manufactured, and this is handled as one component, so that two locations of the battery body 10 are obtained. Therefore, the number of battery assembly steps can be greatly reduced. Further, since the lead assembly 20 is integrated in a separate process different from the connection to the battery body 10, the assembly position of each component can be determined with high accuracy, and as a result, the variation is reduced and the assembly is performed. Defects can be reduced. Moreover, in particular, in the present embodiment, since the PTC element 22 is integrated in advance, the number of parts and the number of assembly steps can be further reduced, and the defect rate can be further reduced. Further, since the minus lead main part 21A and the plus lead main part 21B are integrally handled in the form of the lead piece 21 and divided into the lead assembly 20, the number of parts and assembly man-hours can be further reduced. Yes, and the positional accuracy is higher.
[0021]
Second Embodiment
FIG. 5 shows a second embodiment of the present invention. The difference from the first embodiment is that the PTC element 22 is not provided, and the others are the same as those of the first embodiment. Therefore, the same parts are denoted by the same reference numerals, and redundant description is omitted.
[0022]
Even with such a configuration, it is needless to say that the same effect as in the above embodiment can be obtained.
[0023]
<Third Embodiment>
FIG. 6 shows a third embodiment of the present invention. The difference from the first embodiment is that the minus lead main portion 21A and the plus lead main portion 21B are not integrated and are independent as two lead pieces 21A and 21B. Since other configurations are the same as those of the first embodiment, the same portions are denoted by the same reference numerals, and redundant description is omitted.
[0024]
Even in such a configuration, since the negative lead main body 21A, the positive lead main body 21B, and the PTC element 22 can be made into a single part in advance as the lead assembly 20, the number of parts and the number of steps for assembling the battery main body 10 can be reduced. In addition, excellent effects such as a reduction in defective rate due to an improvement in position accuracy can be obtained.
[0025]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
[0026]
(1) In each of the above embodiments, since the lead assembly 20 is configured using the two insulating tapes 23, the lead main body portions 21A, 21B and the like can be prevented from being exposed. The lead assembly 20 may be configured using only the insulating tape 23 on the battery body 10 side.
[0027]
(2) In each of the embodiments described above, the severable portions 21E and 21F are provided at two locations. However, this may be one location, and the press hole for separating them is not limited to a circle, but a rectangular shape. It may be. Furthermore, the severable portion may be separated by laser irradiation, for example, without using a press. In short, the minus lead main portion 21A and the plus lead main portion 21B are formed before the lead assembly 20 is formed. Is connected in series through the cuttable portions 21E and 21F, and if the cuttable portions 21E and 21F are electrically separated by being cut off after being integrated with the insulating tape 23, the manufacturing process is most rational. The effect of becoming effective is obtained.
[0028]
(3) In the above embodiment, the insulating tape 23 is affixed with a heat-sensitive adhesive. However, the present invention is not limited to this, and an adhesive double-sided tape, an anaerobic or two-component mixed adhesive may be used.
[Brief description of the drawings]
FIGS. 1A and 1B are perspective views of an assembling process according to a first embodiment of the present invention, where FIG. 1A shows before assembly and FIG. 1B shows after assembly.
2A and 2B are perspective views showing a manufacturing process of a lead assembly, in which FIG. 2A is an overall view, and FIG. 2B is a partially enlarged view.
3A and 3B are perspective views showing a manufacturing process of the lead assembly, where FIG. 3A is an overall view, and FIG. 3B is a partially enlarged view.
4A and 4B are perspective views showing a completed form of the lead assembly, where FIG. 4A is an overall view and FIG. 4B is a partially enlarged view.
FIGS. 5A and 5B are perspective views of an assembling process according to a second embodiment of the present invention, where FIG. 5A shows before assembly and FIG. 5B shows after assembly.
6A and 6B are perspective views of an assembling process according to a third embodiment of the present invention, where FIG. 6A is an overall view, and FIG. 6B is a partially enlarged view.
7A and 7B are perspective views showing a conventional example, in which FIG. 7A shows before assembly and FIG. 7B shows after assembly.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Battery main body 11 ... Electrode part 12 ... Electrode part 20 ... Lead assembly 21 ... Lead piece 21E, 21F ... Cutting | disconnection part 22 ... PTC element (protection element)
23 ... Insulating tape (insulating sheet)
31, 32 ... Current extraction lead part

Claims (2)

発電要素を内部に収容した電池本体の外面に絶縁シートを介してリード片を沿わせ、前記電池本体にその電極部に連なる正負一対の電流取り出しリード部を設けてなる電池の製造方法であって、前記リード片及び前記一対の電流取り出し部を前記絶縁シートに共に予め一体化してリードアッセンブリを形成し、その後、そのリードアッセンブリの前記リード片を前記電池本体の電極部に接続し、
前記一対の電流取り出し部は前記リードアッセンブリの形成前には切断可能部を介して一連に連なっており、前記絶縁シートに貼り付けた後に前記切断可能部を切り落とすことにより前記絶縁シートを介して連なりながら電気的には独立させてあることを特徴とする電池の製造方法。
A battery manufacturing method in which a lead piece is placed along an outer surface of a battery body containing an electric power generation element via an insulating sheet, and a pair of positive and negative current extraction leads connected to the electrode part is provided on the battery body. The lead piece and the pair of current extraction parts are integrated together in advance in the insulating sheet to form a lead assembly, and then the lead piece of the lead assembly is connected to the electrode part of the battery body ,
The pair of current extraction portions are connected in series through a cuttable portion before the lead assembly is formed, and are connected through the insulating sheet by cutting off the cuttable portion after being attached to the insulating sheet. However, it is electrically independent, The manufacturing method of the battery characterized by the above-mentioned.
リードアッセンブリの前記リード片には電流遮断用の保護素子を予め一体化しておくことを特徴とする請求項記載の電池の製造方法。Method for producing a battery according to claim 1, wherein the advance integrated protection device for current interruption in the reed of the lead assembly.
JP2001215727A 2001-07-16 2001-07-16 Battery manufacturing method Expired - Fee Related JP5019679B2 (en)

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