JP3397132B2 - Manufacturing method of secondary battery - Google Patents
Manufacturing method of secondary batteryInfo
- Publication number
- JP3397132B2 JP3397132B2 JP11971198A JP11971198A JP3397132B2 JP 3397132 B2 JP3397132 B2 JP 3397132B2 JP 11971198 A JP11971198 A JP 11971198A JP 11971198 A JP11971198 A JP 11971198A JP 3397132 B2 JP3397132 B2 JP 3397132B2
- Authority
- JP
- Japan
- Prior art keywords
- current collecting
- secondary battery
- collecting tab
- current
- positive electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、正極と負極がセパ
レータを介して捲回された電極群、該電極群が電解液と
共に収容された円筒容器、該円筒容器の端面から導出さ
れた出力端子を有する二次電池の製造法に関するもので
あり、特に、電気自動車用二次電池に適した製造法を提
供するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode group in which a positive electrode and a negative electrode are wound with a separator interposed therebetween, a cylindrical container in which the electrode group is accommodated together with an electrolytic solution, and an output terminal led out from the end face of the cylindrical container. The present invention relates to a method for manufacturing a secondary battery having the above, and particularly to a method for manufacturing a secondary battery for an electric vehicle.
【０００２】[0002]
【従来の技術】従来、正極と負極がセパレータを介して
捲回された電極群、該電極群が電解液と共に収容された
円筒容器、該円筒容器の端面から導出された出力端子を
有する二次電池で、特に、電気自動車用二次電池では、
内部抵抗を下げて集電特性を向上させるために、特開平
９−９２３３８号公報記載のように、前記電極群の端面
において正極または負極から多数の集電タブを導出し、
前記出力端子の極柱に設けた円板状部分の外周部に前記
集電タブを溶接することが提案された。2. Description of the Related Art Conventionally, a secondary electrode has an electrode group in which a positive electrode and a negative electrode are wound via a separator, a cylindrical container in which the electrode group is accommodated together with an electrolytic solution, and an output terminal led out from an end surface of the cylindrical container. In batteries, especially in secondary batteries for electric vehicles,
In order to reduce the internal resistance and improve the current collecting characteristics, as described in JP-A-9-92338, a large number of current collecting tabs are derived from the positive electrode or the negative electrode on the end face of the electrode group,
It has been proposed to weld the current collecting tab to the outer peripheral portion of the disk-shaped portion provided on the pole of the output terminal.
【０００３】[0003]
【発明が解決しようとする課題】ところが、上記の方法
では、予め多数の集電タブに所定量の弛みをもたせてそ
ろえおき、この状態で集電タブを円板状部分の外周部に
溶接した後、先の弛みを折畳んでいるために、この弛み
が集電タブと円板状部分間の位置ずれを起こし易く、一
部の集電タブに応力が集中した場合、その集電タブが破
断して集電性を損なうおそれがあった。本発明は、集電
タブからの集電性の良い軽量な二次電池の製造法を提供
することを目的とするものである。However, in the above method, a large number of current collecting tabs are provided in advance with a predetermined amount of slack, and in this state, the current collecting tabs are welded to the outer peripheral portion of the disk-shaped portion. After that, since the slack is folded, this slack is likely to cause a positional deviation between the current collecting tab and the disk-shaped part, and when stress concentrates on some current collecting tabs, the current collecting tab is There was a risk of breaking and impairing current collection. It is an object of the present invention to provide a method of manufacturing a lightweight secondary battery having good current collecting property from a current collecting tab.
【０００４】[0004]
【課題を解決するための手段】本発明の二次電池の製造
法は、上記課題を解決するためになされたもので、第１
の発明は、正極と負極がセパレータを介して捲回された
電極群、該電極群が電解液と共に収容された円筒容器、
該円筒容器の端面から導出された出力端子を有する二次
電池を有する二次電池の製造法であって、充電時に前記
正極がリチウムイオンを放出可能な物質を含み、前記負
極がリチウムイオンを吸収可能な物質を含み、前記正極
から導出された集電タブとしてアルミニウムまたはアル
ミニウム合金の薄片を用い、前記負極から導出された集
電タブとして銅または銅合金の薄片を用い、前記電極群
の端面において前記正極または負極から導出された多数
の集電タブを屈曲集合させて集電タブによる環状の突出
部を形成し、次いで該突出部の内側に、前記出力端子に
電気的に接続されている金属製のリング状またはフラン
ジ状の集電部を挿入し、該集電部の集縁に前記突出部を
溶接する際、該突出部の上から前記集電タブの厚さより
厚く前記集電タブと同系の金属からなる金属片を当接
し、該金属片の上から超音波溶接を行うことを特徴とす
ることにより、形成された集電タブによる環状の突出部
は、集電タブとしての弛みがなくなるため、スペース効
率を向上すると共に、金属製のリング状またはフランジ
状の集電部との間で位置ずれを起こしにくく、一部の集
電タブが破断して集電性を損なうようなことが起こりに
くい。また、小型軽量化でき、エネルギー密度向上をも
たらす。 前記集電部の周縁に前記突出部を溶接する際、
該突出部の上から前記集電タブの厚さより厚く前記集電
タブと同系の金属からなる金属片を当接し、該金属片の
上から超音波溶接を行うことにより、溶接時の集電タブ
の破断を防止でき、溶接後の熱収縮で歪が出ない。 A method of manufacturing a secondary battery according to the present invention is made to solve the above-mentioned problems.
The invention of, an electrode group in which a positive electrode and a negative electrode are wound via a separator, a cylindrical container in which the electrode group is housed together with an electrolytic solution,
A method for manufacturing a secondary battery having a secondary battery having an output terminal led out from an end surface of the cylindrical container, the method comprising:
The positive electrode contains a substance capable of releasing lithium ions,
The positive electrode includes a substance capable of absorbing lithium ions,
Aluminum or aluminum as a current collector tab derived from
Using a thin piece of a minium alloy, a collector derived from the negative electrode was used.
A thin piece of copper or a copper alloy is used as the current collecting tab, and a large number of current collecting tabs derived from the positive electrode or the negative electrode are bent and assembled at the end surface of the electrode group to form an annular protrusion by the current collecting tab, and then the current collecting tab is formed. Inside the protrusion, insert a metal ring-shaped or flange-shaped current collector electrically connected to the output terminal, when welding the protrusion to the edge of the current collector , From the thickness of the current collecting tab above the protrusion
A thick metal piece made of the same metal as the current collector tab is abutted
However , since the ultrasonic projection is performed from above the metal piece, the annular projection formed by the current collecting tab has no slack as the current collecting tab, thus improving space efficiency and The metal-ring-shaped or flange-shaped current collector is less likely to be displaced, and some of the current-collecting tabs are less likely to be broken to impair the current-collecting property. In addition, it can be made smaller and lighter, and can also improve energy density.
Let me down. When welding the protrusion to the periphery of the current collector,
From the top of the projecting portion, the current collecting tab is thicker than the current collecting tab.
Touch a metal piece made of the same metal as the tab, and
By performing ultrasonic welding from above, the current collecting tab during welding
Can be prevented and no distortion occurs due to heat shrinkage after welding.
【０００５】第２の発明は、前記第１の発明において、
前記金属片として前記集電タブより柔軟な材料を用いる
ことを特徴とすることにより、該金属片が緩衝材として
作用し、集電タブを保護しつつ確実な溶接をもたらす。A second invention is the same as the first invention,
By using a material that is softer than the current collecting tab as the metal piece, the metal piece acts as a cushioning material and provides reliable welding while protecting the current collecting tab.
【０００６】[0006]
【発明の実施の形態】本発明に係る二次電池の製造法の
実施の形態の一例を図１〜２に示す。図１は、本発明二
次電池の組立方法を示しており、正極と負極がセパレー
タを介して捲回された電極群１、該電極群１が電解液と
共に収容された円筒容器２、該円筒容器２の端面から導
出された出力端子３を有する二次電池の製造法であっ
て、前記電極群１の端面において前記正極または負極か
ら導出された多数の集電タブ４を屈曲集合させて図２に
示すような集電タブ４による環状の突出部５を形成し、
次いで該突出部５の内側に、前記出力端子３に電気的に
接続されている金属製のリング状またはフランジ状の集
電部６を挿入し、該集電部６の周縁に前記突出部５を溶
接する。前記突出部５を形成する前段階では集電タブ４
の長さは一律とし、前記突出部５を形成した後段階では
該突出部５に必要な高さ以上の集電タブ４の余剰長さの
部分を切除する。前記集電部６の周縁に前記突出部５を
溶接する際、該突出部５の上から前記集電タブ４の厚さ
より厚い金属片７を当接し、該金属片７の上から超音波
溶接を行う。前記金属片７として前記集電タブ４と同系
の金属で該集電タブ４より柔軟な材料を用いる。充電時
に前記正極がリチウムイオンを放出可能な物質を含み、
前記負極がリチウムイオンを吸収可能な物質を含み、前
記正極から導出された集電タブ４としてアルミニウムま
たはアルミニウム合金の薄片を用い、前記負極から導出
された集電タブ４として銅または銅合金の薄片を用い
る。尚、図１における８は、円筒容器の蓋部、９は樹脂
製の支持部材１０に嵌合される樹脂製のスペーサであ
る。1 and 2 show an example of an embodiment of a method for manufacturing a secondary battery according to the present invention. FIG. 1 shows a method for assembling a secondary battery of the present invention, which includes an electrode group 1 in which a positive electrode and a negative electrode are wound with a separator interposed therebetween, a cylindrical container 2 in which the electrode group 1 is accommodated together with an electrolytic solution, and a cylinder. A method of manufacturing a secondary battery having an output terminal 3 led out from an end face of a container 2, wherein a plurality of current collecting tabs 4 led out from the positive electrode or the negative electrode are bent and assembled on an end face of the electrode group 1. Forming an annular protrusion 5 by the current collecting tab 4 as shown in FIG.
Then, a metal ring-shaped or flange-shaped current collector 6 electrically connected to the output terminal 3 is inserted into the inside of the protrusion 5, and the protrusion 5 is provided on the periphery of the current collector 6. To weld. In the previous stage of forming the protrusion 5, the current collecting tab 4
Has a uniform length, and in the subsequent stage after the formation of the protruding portion 5, a portion having an excess length of the current collecting tab 4 which is higher than the height required for the protruding portion 5 is cut off. When the protrusion 5 is welded to the periphery of the current collector 6, a metal piece 7 thicker than the thickness of the current collector tab 4 is abutted on the protrusion 5 and ultrasonic welding is performed on the metal piece 7. I do. As the metal piece 7, a metal similar to the current collecting tab 4 and softer than the current collecting tab 4 is used. The positive electrode contains a substance capable of releasing lithium ions during charging,
The negative electrode contains a substance capable of absorbing lithium ions, and a thin piece of aluminum or an aluminum alloy is used as the current collecting tab 4 derived from the positive electrode, and a thin piece of copper or a copper alloy is used as the current collecting tab 4 derived from the negative electrode. To use. In FIG. 1, 8 is a lid of the cylindrical container, and 9 is a resin spacer fitted to a resin support member 10.
【０００７】[0007]
【発明の効果】上述したように、本発明により、集電タ
ブからの集電性の良い軽量な二次電池を提供でき、その
結果、高いエネルギー密度(Wh/kg,Wh/l)や出力密度(W/k
g,W/l)が要求される実用的な電気自動車用二次電池とし
て利用できる。As described above, according to the present invention, it is possible to provide a lightweight secondary battery having good current collecting property from the current collecting tab, and as a result, high energy density (Wh / kg, Wh / l) and output. Density (W / k
It can be used as a practical secondary battery for electric vehicles that requires g, W / l).
【図１】本発明の一実施形態における組立方法を示す斜
視図である。FIG. 1 is a perspective view showing an assembly method according to an embodiment of the present invention.
【図２】本発明の一実施形態における集電タブによる環
状の突出部を形成した電極群を示す斜視図である。FIG. 2 is a perspective view showing an electrode group in which an annular protrusion is formed by a current collecting tab according to the embodiment of the present invention.
１は電極群、２は円筒容器、３は出力端子、４は集電タ
ブ、５は環状に形成された突出部、６はリング状または
フランジ状の集電部、７は金属片、８は円筒容器の蓋
部、９は樹脂製のスペーサ、１０は樹脂製の支持部材DESCRIPTION OF SYMBOLS 1 is an electrode group, 2 is a cylindrical container, 3 is an output terminal, 4 is a current collecting tab, 5 is an annular protrusion, 6 is a ring-shaped or flange-shaped current collector, 7 is a metal piece, and 8 is Cylindrical container lid, 9 resin spacer, 10 resin support member
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 10/04 H01M 2/22 H01M 2/26 H01M 4/02 H01M 10/38 H01M 10/40 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) H01M 10/04 H01M 2/22 H01M 2/26 H01M 4/02 H01M 10/38 H01M 10/40
Claims (2)
た電極群、該電極群が電解液と共に収容された円筒容
器、該円筒容器の端面から導出された出力端子を有する
二次電池を有する二次電池の製造法であって、充電時に
前記正極がリチウムイオンを放出可能な物質を含み、前
記負極がリチウムイオンを吸収可能な物質を含み、前記
正極から導出された集電タブとしてアルミニウムまたは
アルミニウム合金の薄片を用い、前記負極から導出され
た集電タブとして銅または銅合金の薄片を用い、前記電
極群の端面において前記正極または負極から導出された
多数の集電タブを屈曲集合させて集電タブによる環状の
突出部を形成し、次いで該突出部の内側に、前記出力端
子に電気的に接続されている金属製のリング状またはフ
ランジ状の集電部を挿入し、該集電部の集縁に前記突出
部を溶接する際、該突出部の上から前記集電タブの厚さ
より厚く前記集電タブと同系の金属からなる金属片を当
接し、該金属片の上から超音波溶接を行うことを特徴と
する二次電池の製造法。1. A secondary battery having an electrode group in which a positive electrode and a negative electrode are wound with a separator interposed therebetween, a cylindrical container in which the electrode group is accommodated together with an electrolytic solution, and an output terminal led out from an end face of the cylindrical container. a manufacturing method of a secondary battery having, during charging
The positive electrode includes a material capable of releasing lithium ions,
The negative electrode contains a substance capable of absorbing lithium ions, and
Aluminum or as a current collector tab derived from the positive electrode
Using aluminum alloy flakes, derived from the negative electrode
Using a thin piece of copper or a copper alloy as a current collecting tab, a plurality of current collecting tabs derived from the positive electrode or the negative electrode are bent and assembled at the end face of the electrode group to form an annular protrusion by the current collecting tab, then the inside of the projecting portion, when the electrically connected and insert the ring-shaped or flange-like current collecting portion of the metal to the output terminal, welding the projecting portions to the current edges of the current collecting portion , The thickness of the current collecting tab from above the protrusion
Touch a thicker metal piece made of the same metal as the current collecting tab.
A method for manufacturing a secondary battery , comprising contacting and ultrasonic welding from above the metal piece .
材料を用いることを特徴とする請求項１記載の二次電池
の製造法。2. A method for producing a secondary battery according to claim 1, characterized by using a flexible material than the current collector tabs as said metal strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11971198A JP3397132B2 (en) | 1998-04-28 | 1998-04-28 | Manufacturing method of secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11971198A JP3397132B2 (en) | 1998-04-28 | 1998-04-28 | Manufacturing method of secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11312532A JPH11312532A (en) | 1999-11-09 |
| JP3397132B2 true JP3397132B2 (en) | 2003-04-14 |
Family
ID=14768222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11971198A Expired - Lifetime JP3397132B2 (en) | 1998-04-28 | 1998-04-28 | Manufacturing method of secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3397132B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003100886A1 (en) | 2002-05-27 | 2003-12-04 | Japan Storage Battery Co., Ltd. | Battery |
| JP4606079B2 (en) * | 2004-07-21 | 2011-01-05 | 三洋電機株式会社 | battery |
| JP7262041B2 (en) * | 2018-12-14 | 2023-04-21 | パナソニックＩｐマネジメント株式会社 | Electrochemical device |
| KR102490097B1 (en) | 2019-01-02 | 2023-01-17 | 주식회사 엘지에너지솔루션 | Mrthod for manufacturing cylindrical battery having multiple tabs and cylindrical battery manufactured using the same |
-
1998
- 1998-04-28 JP JP11971198A patent/JP3397132B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11312532A (en) | 1999-11-09 |
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