JP2000173562A - Sealing method of bag for thin battery and die for use in method - Google Patents

Sealing method of bag for thin battery and die for use in method

Info

Publication number
JP2000173562A
JP2000173562A JP10342187A JP34218798A JP2000173562A JP 2000173562 A JP2000173562 A JP 2000173562A JP 10342187 A JP10342187 A JP 10342187A JP 34218798 A JP34218798 A JP 34218798A JP 2000173562 A JP2000173562 A JP 2000173562A
Authority
JP
Japan
Prior art keywords
lead wire
heat
sealing
thin battery
mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10342187A
Other languages
Japanese (ja)
Inventor
Masahiko Tatsuki
雅彦 辰木
Masaki Goto
正樹 後藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Riko Co Ltd
Original Assignee
Sumitomo Riko Co Ltd
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 Sumitomo Riko Co Ltd filed Critical Sumitomo Riko Co Ltd
Priority to JP10342187A priority Critical patent/JP2000173562A/en
Publication of JP2000173562A publication Critical patent/JP2000173562A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7234—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/735—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3468—Batteries, accumulators or fuel cells
    • 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

Abstract

PROBLEM TO BE SOLVED: To offer a sealing method for a bag for a thin battery capable of reducing the cost for insulating and provide a die for use in the method. SOLUTION: A laminate sheet 1 is formed from metal foils 2 and sealant layers 3 for an electricity generating element of a thin battery, and the sealant layers 3 are subjected to heat sealing into a sack form, wherein a lead 4 is pinched by the sealant layers 3, and the heat sealing is conducted using a die 5 having a recess 6 following the shape of the lead 4.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、リチウムイオン二
次電池（ＬＩＢ）等の薄型電池用の発電要素を収納する
薄型電池用袋体のシール方法およびそれに用いる金型に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sealing a thin battery bag for accommodating a power generating element for a thin battery such as a lithium ion secondary battery (LIB) and a mold used therefor.

【０００２】[0002]

【従来の技術】最近の種々の電子機器の発達に伴い、電
子機器の小型化，省スペース化のニーズが高まってお
り、これに用いる薄型電池（シート状電池）にも更なる
薄型化と可撓性が求められている。このようなニーズに
応えるものとして、ゲル状ポリマー電解質を用いたリチ
ウムイオン二次電池が実用化段階に入りつつある。2. Description of the Related Art With the recent development of various electronic devices, there is an increasing need for miniaturization and space saving of electronic devices. Flexibility is required. In order to meet such needs, a lithium ion secondary battery using a gel polymer electrolyte is entering a stage of practical use.

【０００３】図２および図３はそのゲル状ポリマー電解
質を用いたリチウムイオン二次電池の構造例を示してい
る。図において、２１は正極集電体（アルミニウム
箔）、２２は正極（コバルト酸リチウム等のリチウム含
有複合酸化物）、２３は隔離材（溶媒で可塑化されたポ
リマー電解質）、２４は負極（炭素材）、２５は負極集
電体（銅箔）であり、これら発電要素が収納手段２６
（この構造例では、収納手段２６としてアルミニウムラ
ミネートフィルムが用いられている）に収納されてい
る。また、２６ａは収納手段２６の外周部に形成された
ヒートシール部、２７は外周部に絶縁皮膜が形成（絶縁
処理）されているリード線である。このリード線２７に
形成された絶縁皮膜は、収納手段２６のアルミニウム材
との短絡を防止している。FIGS. 2 and 3 show an example of the structure of a lithium ion secondary battery using the gel polymer electrolyte. In the figure, 21 is a positive electrode current collector (aluminum foil), 22 is a positive electrode (a lithium-containing composite oxide such as lithium cobalt oxide), 23 is a separator (polymer electrolyte plasticized with a solvent), and 24 is a negative electrode (charcoal). ) And 25 are negative electrode current collectors (copper foil).
(In this structural example, an aluminum laminated film is used as the storage means 26). Reference numeral 26a denotes a heat seal portion formed on the outer peripheral portion of the storage means 26, and 27 denotes a lead wire having an outer peripheral portion on which an insulating film is formed (insulated). The insulating film formed on the lead wire 27 prevents a short circuit with the aluminum material of the storage means 26.

【０００４】このようなリチウムイオン二次電池は発電
要素に可撓性を持たせることができるうえ、液漏れの危
険性が低いため、上記構造例のように、発電要素を薄い
ラミネート材で収納することができる。例えば、特開平
９−７６３６号公報では、ラミネート材として、ポリエ
チレン層とアルミニウム箔層とポリエチレン層との三層
ラミネート箔が用いられている。そして、電極の取り出
しは、収納手段の内側に正極集電体および負極集電体を
接合させ、窓を開けた部分に出力端子を設け、この出力
端子にリード線を接続している構造をとっている。In such a lithium ion secondary battery, the power generating element can be made flexible and the danger of liquid leakage is low, so that the power generating element is housed in a thin laminated material as in the above-described structural example. can do. For example, in JP-A-9-7636, a three-layer laminate foil of a polyethylene layer, an aluminum foil layer, and a polyethylene layer is used as a laminate material. The electrode is taken out by joining a positive electrode current collector and a negative electrode current collector inside the storage means, providing an output terminal at a portion where the window is opened, and connecting a lead wire to the output terminal. ing.

【０００５】[0005]

【発明が解決しようとする課題】しかしながら、上記リ
ード線２７は、収納手段２６のアルミニウム材との短絡
を防止するために、その外周部に絶縁皮膜が形成（絶縁
処理）されることが必要である。このため、絶縁皮膜が
形成（絶縁処理）される分の材料コストが上がる。一
方、絶縁皮膜が形成されていないリード線を用いると、
収納手段２６とリード線２７との短絡防止のためには、
正極集電体２１，負極集電体２５および外部電極接点の
金属部のみを露出させてその他の部分を絶縁皮膜で覆う
（絶縁処理する）必要がある。このため、絶縁皮膜で覆
う（絶縁処理する）分の材料コストが上がる。However, in order to prevent a short circuit between the lead wire 27 and the aluminum material of the housing means 26, it is necessary that an insulating film is formed (insulated) on the outer peripheral portion. is there. For this reason, the material cost for the formation (insulation treatment) of the insulating film increases. On the other hand, if a lead wire with no insulating film is used,
In order to prevent a short circuit between the storage means 26 and the lead wire 27,
It is necessary to expose only the metal part of the positive electrode current collector 21, the negative electrode current collector 25, and the external electrode contact, and cover the other part with an insulating film (insulation treatment). For this reason, the material cost for covering (insulating) with the insulating film increases.

【０００６】本発明は、このような事情に鑑みなされた
もので、絶縁処理に必要なコストを低減させる薄型電池
用袋体のシール方法およびそれに用いる金型の提供をそ
の目的とする。The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method of sealing a thin battery bag and a mold used therefor, which reduce the cost required for insulation treatment.

【０００７】[0007]

【課題を解決するための手段】上記の目的を達成するた
め、本発明は、薄型電池用発電要素を収納するために金
属層とシーラント層とからなるラミネート材のシーラン
ト層同士をヒートシールして袋状に形成する薄型電池用
袋体のシール方法であって、リード線をヒートシールさ
れるシーラント層間で挟持し、リード線の形状に対応さ
せた凹部を有する金型を用いてヒートシールする薄型電
池用袋体のシール方法を第１の要旨とし、薄型電池用発
電要素を収納するために金属層とシーラント層とからな
るラミネート材のシーラント層同士をヒートシールして
袋状に形成する際に用いるヒートシール用の金型であっ
て、この金型の押圧面に、ヒートシールされるシーラン
ト層間から取り出されるリード線の形状に対応する凹部
が形成されているヒートシール用の金型を第２の要旨と
する。In order to achieve the above object, the present invention provides a method for heat-sealing sealant layers of a laminate comprising a metal layer and a sealant layer in order to accommodate a power generating element for a thin battery. A method of sealing a thin battery bag formed in a bag shape, wherein a lead wire is sandwiched between heat-sealed sealant layers and heat-sealed using a mold having a concave portion corresponding to the shape of the lead wire. The first aspect of the present invention is a method of sealing a bag for a battery. When a sealant layer of a laminate material including a metal layer and a sealant layer is heat-sealed to form a bag shape for housing a power generating element for a thin battery. A heat-sealing mold to be used, wherein a depression corresponding to the shape of a lead wire taken out from a sealant layer to be heat-sealed is formed on a pressing surface of the mold. The molds for Toshiru the second aspect.

【０００８】すなわち、本発明の薄型電池用袋体のシー
ル方法は、リード線をヒートシールされるシーラント層
間で挟持し、リード線の形状に対応させた凹部を有する
金型を用いてヒートシールするため、リード線には過剰
の圧力がかからなくなり、製造された薄型電池用袋体の
ヒートシール部は、リード線に対応した形状になる。こ
のため、リード線は、ラミネート材の金属層と接触しな
くなる。このことから、リード線に絶縁皮膜を形成する
必要がなくなり、その結果、絶縁皮膜の材料コストを低
減することができる。That is, according to the method of sealing a thin battery bag of the present invention, a lead wire is sandwiched between heat-sealed sealant layers and heat-sealed using a mold having a concave portion corresponding to the shape of the lead wire. Therefore, excessive pressure is not applied to the lead wire, and the heat seal portion of the manufactured thin battery bag has a shape corresponding to the lead wire. Therefore, the lead wire does not come into contact with the metal layer of the laminate material. Therefore, it is not necessary to form an insulating film on the lead wire, and as a result, the material cost of the insulating film can be reduced.

【０００９】また、本発明の金型は、その押圧面に、ヒ
ートシールされるシーラント層間から取り出されるリー
ド線の形状に対応する凹部が形成されているため、リー
ド線に過剰の圧力をかけることなく、シーラント層をヒ
ートシールすることができる。このため、製造された薄
型電池用袋体のヒートシール部は、リード線に対応した
形状になり、リード線は、ラミネート材の金属層と接触
しなくなる。このことから、リード線に絶縁皮膜を形成
する必要がなくなり、その結果、絶縁皮膜の材料コスト
を低減することができる。なお、これら両発明におい
て、「リード線」とは、絶縁皮膜が形成されていない導
線からなるものである。Further, in the mold of the present invention, since a concave portion corresponding to the shape of the lead wire taken out from the sealant layer to be heat-sealed is formed on the pressing surface, excessive pressure may be applied to the lead wire. In addition, the sealant layer can be heat-sealed. For this reason, the heat seal portion of the manufactured thin battery bag has a shape corresponding to the lead wire, and the lead wire does not come into contact with the metal layer of the laminate material. Therefore, it is not necessary to form an insulating film on the lead wire, and as a result, the material cost of the insulating film can be reduced. In these two inventions, the “lead wire” is a conductive wire on which no insulating film is formed.

【００１０】つぎに、本発明を詳しく説明する。Next, the present invention will be described in detail.

【００１１】本発明の薄型電池用袋体のシール方法は、
金属層とシーラント層とからなるラミネート材のシーラ
ント層同士をヒートシールする。The method for sealing a thin battery bag according to the present invention is as follows.
The sealant layers of the laminate made of the metal layer and the sealant layer are heat-sealed.

【００１２】上記薄型電池用袋体を構成するラミネート
材の金属層の材料としては、圧延，電解等により得られ
る、アルミニウム，アルミニウム合金，銅，銅合金，
鉄，ステンレス，チタン，チタン合金等が用いられ、箔
等各種形態に成形される。そして、その膜厚は５〜１０
０μｍの範囲に設定されることが好ましい。上記膜厚が
５μｍを下回ると、金属層にピンホールが発生し易くな
り、ラミネート材のガスバリア性や遮水性が低下し、１
００μｍを上回ると、薄型電池用袋体の薄型化や可撓性
に不利となる。As the material of the metal layer of the laminate constituting the thin battery bag, aluminum, aluminum alloy, copper, copper alloy, and the like obtained by rolling, electrolysis and the like can be used.
Iron, stainless steel, titanium, titanium alloy and the like are used, and are formed into various forms such as foil. And the film thickness is 5-10
It is preferable that the distance is set in the range of 0 μm. When the film thickness is less than 5 μm, pinholes are likely to be generated in the metal layer, and the gas barrier property and the water-shielding property of the laminate material are reduced.
If it exceeds 00 μm, it is disadvantageous for thinning and flexibility of the thin battery bag.

【００１３】また、上記シーラント層の材料としては、
ポリプロピレン，ポリエチレン，ポリエステル，ポリア
クリロニトリル，エチレン酢酸ビニルコポリマー（ＥＶ
Ａ），ポリビニルアルコール（ＰＶＡ），変性ポリプロ
ピレン，ポリ酢酸ビニル，ポリビニルアセテート等が用
いられる。特に、バリア性および耐薬品性の面からポリ
プロピレン，ポリエチレンが好ましい。そして、その膜
厚は５〜１０００μｍの範囲に設定されることが好まし
い。上記膜厚が５μｍを下回ると、リード線シール部の
気密性（シーラントの埋まり性）およびリード線と金属
層との絶縁性が低下し、１０００μｍを上回ると、薄型
電池用袋体の薄型化に不利となる。The material of the sealant layer is as follows:
Polypropylene, polyethylene, polyester, polyacrylonitrile, ethylene vinyl acetate copolymer (EV
A), polyvinyl alcohol (PVA), modified polypropylene, polyvinyl acetate, polyvinyl acetate and the like are used. Particularly, polypropylene and polyethylene are preferable from the viewpoint of barrier properties and chemical resistance. The thickness is preferably set in the range of 5 to 1000 μm. When the film thickness is less than 5 μm, the airtightness of the lead wire sealing portion (embedding property of the sealant) and the insulation between the lead wire and the metal layer are reduced. Disadvantageous.

【００１４】[0014]

【発明の実施の形態】つぎに、本発明の実施の形態を図
面にもとづいて詳しく説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

【００１５】図１は、本発明の薄型電池用袋体のシール
方法の一実施の形態を示している。この実施の形態で
は、シール方法としてヒートシールを採用し、図２およ
び図３に示すようなリチウムイオン二次電池を製造す
る。そして、ヒートシールする際に用いる金型５の押圧
面５ａには、リード線４の形状に対応させた凹部６が形
成されている。FIG. 1 shows an embodiment of a method for sealing a thin battery bag according to the present invention. In this embodiment, heat sealing is adopted as a sealing method, and a lithium ion secondary battery as shown in FIGS. 2 and 3 is manufactured. A depression 6 corresponding to the shape of the lead wire 4 is formed on the pressing surface 5a of the mold 5 used for heat sealing.

【００１６】この実施の形態の薄型電池用袋体のシール
方法は、上記金型５を用い、つぎのようにして行われ
る。すなわち、まず、２枚のシート材１および発電要素
（図示せず）を準備する。上記シート材１は、アルミニ
ウムからなる金属箔（金属層）２と、この金属箔２の表
面に設けられたポリプロピレンからなるシーラント層３
とからなるラミネート材である。また、上記発電要素
は、図２および図３に示す従来の技術で説明した可撓性
を有するものであり、その大きさは、通常、４０ｍｍ×
８０ｍｍ×２ｍｍ（厚み）程度である。The method of sealing a thin battery bag according to this embodiment is performed as follows using the mold 5 described above. That is, first, two sheet materials 1 and a power generation element (not shown) are prepared. The sheet material 1 includes a metal foil (metal layer) 2 made of aluminum and a sealant layer 3 made of polypropylene provided on the surface of the metal foil 2.
And a laminate material comprising: The power generating element has the flexibility described in the related art shown in FIGS. 2 and 3, and its size is usually 40 mm ×
It is about 80 mm x 2 mm (thickness).

【００１７】ついで、上記２枚のシート材１の間に上記
発電要素を挟む。このとき、シート材１は、そのシーラ
ント層３が対峙するようにする。また、発電要素の電極
に接続されているリード線４は、外周部に絶縁皮膜が形
成（絶縁処理）されていないもので、正極接続用のもの
は、アルミニウム，チタンおよびこれらの合金製導線
（金属部）からなるものであり、負極接続用のものは、
ニッケル，銅およびこれらの合金製導線（金属部）から
なるものであり、上記シーラント層３間で挟まれて外部
に取り出される。Next, the power generating element is sandwiched between the two sheet materials 1. At this time, the sheet material 1 is set so that the sealant layer 3 faces the same. The lead wire 4 connected to the electrode of the power generating element has no insulating film formed on the outer peripheral portion (insulation treatment), and the lead wire for connecting the positive electrode is made of a conductive wire made of aluminum, titanium, or an alloy thereof. Metal part), and for the negative electrode connection,
It is made of a conductive wire (metal portion) made of nickel, copper, or an alloy thereof, and is taken out between the sealant layers 3.

【００１８】そののち、重なったシート材１の周側縁部
（４つの側縁部）を上記金型５を用いてヒートシールす
る。このとき、金型５の押圧面５ａに形成された凹部６
がリード線４に対応する位置に位置決めされるようにし
ておく。After that, the peripheral edge portions (four side edge portions) of the overlapped sheet material 1 are heat-sealed using the mold 5. At this time, the concave portion 6 formed on the pressing surface 5a of the mold 5
Is positioned at a position corresponding to the lead wire 4.

【００１９】上記構成において、リード線４をヒートシ
ールされるシーラント層３間で挟持し、上記金型５を用
いてヒートシールすると、リード線４には過剰の圧力が
かからなくなり、製造された薄型電池用袋体のヒートシ
ール部は、リード線４に対応した形状になる。このた
め、リード線４は、シート材１の金属箔３と接触しなく
なる。In the above configuration, when the lead wire 4 is sandwiched between the sealant layers 3 to be heat-sealed and heat-sealed using the mold 5, no excessive pressure is applied to the lead wire 4. The heat seal portion of the thin battery bag has a shape corresponding to the lead wire 4. Therefore, the lead wire 4 does not contact the metal foil 3 of the sheet material 1.

【００２０】上記実施の形態によれば、ヒートシールす
る際に用いる金型５の押圧面５ａに、リード線４の形状
に対応させた凹部６が形成されているため、リード線４
は、シート材１の金属箔２と接触しなくなる。このこと
から、リード線４に絶縁皮膜を形成する必要がなくな
り、その結果、絶縁皮膜の材料コストを低減することが
できる。According to the above-described embodiment, the recess 6 corresponding to the shape of the lead wire 4 is formed on the pressing surface 5a of the mold 5 used for heat sealing.
Will not come into contact with the metal foil 2 of the sheet material 1. Therefore, it is not necessary to form an insulating film on the lead wire 4, and as a result, the material cost of the insulating film can be reduced.

【００２１】また、絶縁皮膜が形成されていないリード
線４を用いる際に、そのリード線４とシート材１の金属
箔２との短絡防止のために、シーラント層３を厚くする
必要がない。このため、シーラント材の材料コストを低
減することができる。When the lead wire 4 on which the insulating film is not formed is used, it is not necessary to make the sealant layer 3 thick to prevent a short circuit between the lead wire 4 and the metal foil 2 of the sheet material 1. For this reason, the material cost of the sealant material can be reduced.

【００２２】[0022]

【発明の効果】以上のように、本発明の薄型電池用袋体
のシール方法は、リード線をヒートシールされるシーラ
ント層間で挟持し、リード線の形状に対応させた凹部を
有する金型を用いてヒートシールするため、リード線に
は過剰の圧力がかからなくなり、製造された薄型電池用
袋体のヒートシール部は、リード線に対応した形状にな
る。このため、リード線は、ラミネート材の金属層と接
触しなくなる。このことから、リード線に絶縁皮膜を形
成する必要がなくなり、その結果、絶縁皮膜の材料コス
トを低減することができる。As described above, the method for sealing a thin battery bag according to the present invention comprises a mold having a concave portion corresponding to the shape of a lead wire by sandwiching the lead wire between heat-sealed sealant layers. Since heat sealing is performed by using the same, excessive pressure is not applied to the lead wire, and the heat seal portion of the manufactured thin battery bag has a shape corresponding to the lead wire. Therefore, the lead wire does not come into contact with the metal layer of the laminate material. Therefore, it is not necessary to form an insulating film on the lead wire, and as a result, the material cost of the insulating film can be reduced.

【００２３】また、本発明の金型は、その押圧面に、ヒ
ートシールされるシーラント層間から取り出されるリー
ド線の形状に対応する凹部が形成されているため、リー
ド線に過剰の圧力をかけることなく、ヒートシールする
ことができる。このため、製造された薄型電池用袋体の
ヒートシール部は、リード線に対応した形状になり、リ
ード線は、ラミネート材の金属層と接触しなくなる。こ
のことから、リード線に絶縁皮膜を形成する必要がなく
なり、その結果、絶縁皮膜の材料コストを低減すること
ができる。Further, in the mold of the present invention, since a concave portion corresponding to the shape of the lead wire taken out from the sealant layer to be heat-sealed is formed on the pressing surface, excessive pressure may be applied to the lead wire. Without heat sealing. For this reason, the heat seal portion of the manufactured thin battery bag has a shape corresponding to the lead wire, and the lead wire does not come into contact with the metal layer of the laminate material. Therefore, it is not necessary to form an insulating film on the lead wire, and as a result, the material cost of the insulating film can be reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の薄型電池用袋体のシール方法およびそ
れに用いる金型の一実施の形態を示す説明図である。FIG. 1 is an explanatory view showing one embodiment of a method for sealing a thin battery bag according to the present invention and a mold used for the method.

【図２】従来のリチウムイオン二次電池を示す斜視図で
ある。FIG. 2 is a perspective view showing a conventional lithium ion secondary battery.

【図３】従来のリチウムイオン二次電池の構造例を示す
断面図である。FIG. 3 is a cross-sectional view showing a structural example of a conventional lithium ion secondary battery.

【符号の説明】[Explanation of symbols]

１ シート材 ２ 金属箔 ３ シーラント層 ４ リード線 ５ 金型 ６ 凹部 DESCRIPTION OF SYMBOLS 1 Sheet material 2 Metal foil 3 Sealant layer 4 Lead wire 5 Mold 6 Depression

フロントページの続き Ｆターム(参考） 5H011 CC02 CC06 CC10 DD13 DD26 FF04 GG01 HH02 JJ04 JJ12 JJ29 5H029 AJ14 AL12 BJ04 CJ05 CJ30 DJ02 DJ03 DJ05 DJ14 Continued on the front page F-term (reference) 5H011 CC02 CC06 CC10 DD13 DD26 FF04 GG01 HH02 JJ04 JJ12 JJ29 5H029 AJ14 AL12 BJ04 CJ05 CJ30 DJ02 DJ03 DJ05 DJ14

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 薄型電池用発電要素を収納するために金
属層とシーラント層とからなるラミネート材のシーラン
ト層同士をヒートシールして袋状に形成する薄型電池用
袋体のシール方法であって、リード線をヒートシールさ
れるシーラント層間で挟持し、リード線の形状に対応さ
せた凹部を有する金型を用いてヒートシールすることを
特徴とする薄型電池用袋体のシール方法。1. A method for sealing a thin battery bag, wherein a sealant layer of a laminate material including a metal layer and a sealant layer is heat-sealed to form a bag shape for housing a thin battery power generating element. A method for sealing a thin battery bag, wherein a lead wire is sandwiched between sealant layers to be heat-sealed and heat-sealed using a mold having a concave portion corresponding to the shape of the lead wire. 【請求項２】 薄型電池用発電要素を収納するために金
属層とシーラント層とからなるラミネート材のシーラン
ト層同士をヒートシールして袋状に形成する際に用いる
ヒートシール用の金型であって、この金型の押圧面に、
ヒートシールされるシーラント層間から取り出されるリ
ード線の形状に対応する凹部が形成されていることを特
徴とするヒートシール用の金型。2. A heat-sealing mold used to form a bag by heat-sealing sealant layers of a laminate material comprising a metal layer and a sealant layer to accommodate a power generating element for a thin battery. Then, on the pressing surface of this mold,
A mold for heat sealing, wherein a concave portion corresponding to a shape of a lead wire taken out from a sealant layer to be heat-sealed is formed.
JP10342187A 1998-12-01 1998-12-01 Sealing method of bag for thin battery and die for use in method Pending JP2000173562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10342187A JP2000173562A (en) 1998-12-01 1998-12-01 Sealing method of bag for thin battery and die for use in method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10342187A JP2000173562A (en) 1998-12-01 1998-12-01 Sealing method of bag for thin battery and die for use in method

Publications (1)

Publication Number Publication Date
JP2000173562A true JP2000173562A (en) 2000-06-23

Family

ID=18351797

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP2000173562A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
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JP2001229889A (en) * 2000-02-14 2001-08-24 Toyota Motor Corp Battery of film sealing structure and manufacturing method thereof
JP2004087364A (en) * 2002-08-28 2004-03-18 Sanyo Electric Co Ltd Thin sealed battery and its manufacturing method
KR101067755B1 (en) 2009-07-09 2011-09-28 주식회사 엘티케이 Fabrication method for electrode of pouch type secondary battery by injection molding method
JP2011258570A (en) * 2011-08-24 2011-12-22 Dainippon Printing Co Ltd Seal method using seal head for polymer battery packaging
JP2012094374A (en) * 2010-10-27 2012-05-17 Enax Inc External packaging material of laminate battery, method of producing external packaging material of laminate battery, method of manufacturing laminate battery, and laminate battery
WO2013128594A1 (en) * 2012-02-29 2013-09-06 エナックス株式会社 Exterior material for laminated battery, method for manufacturing exterior material for laminated battery, method for manufacturing laminated battery and laminated battery
KR20160096417A (en) * 2015-02-05 2016-08-16 주식회사 엘지화학 Apparatus and method for sealing pouch of secondary battery
JP2017152140A (en) * 2016-02-23 2017-08-31 積水化学工業株式会社 Secondary battery, seal bar, and method of manufacturing secondary battery
KR20180016481A (en) * 2015-06-09 2018-02-14 인더스트리-파트너 게엠베하 라데보일-코스빅 Electrolyte pouch type cell manufacturing method for electric battery device, corresponding manufacturing device and electrolyte pouch type cell
WO2020125696A1 (en) * 2018-12-18 2020-06-25 宁德新能源科技有限公司 Battery cell and battery
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001229889A (en) * 2000-02-14 2001-08-24 Toyota Motor Corp Battery of film sealing structure and manufacturing method thereof
JP2004087364A (en) * 2002-08-28 2004-03-18 Sanyo Electric Co Ltd Thin sealed battery and its manufacturing method
KR101067755B1 (en) 2009-07-09 2011-09-28 주식회사 엘티케이 Fabrication method for electrode of pouch type secondary battery by injection molding method
JP2012094374A (en) * 2010-10-27 2012-05-17 Enax Inc External packaging material of laminate battery, method of producing external packaging material of laminate battery, method of manufacturing laminate battery, and laminate battery
JP2011258570A (en) * 2011-08-24 2011-12-22 Dainippon Printing Co Ltd Seal method using seal head for polymer battery packaging
WO2013128594A1 (en) * 2012-02-29 2013-09-06 エナックス株式会社 Exterior material for laminated battery, method for manufacturing exterior material for laminated battery, method for manufacturing laminated battery and laminated battery
KR20160096417A (en) * 2015-02-05 2016-08-16 주식회사 엘지화학 Apparatus and method for sealing pouch of secondary battery
KR20180016481A (en) * 2015-06-09 2018-02-14 인더스트리-파트너 게엠베하 라데보일-코스빅 Electrolyte pouch type cell manufacturing method for electric battery device, corresponding manufacturing device and electrolyte pouch type cell
JP2018524790A (en) * 2015-06-09 2018-08-30 インドゥストリー−パートナー ゲゼルシャフト ミット ベシュレンクテル ハフツング ラーデボイル−コスヴィヒＩｎｄｕｓｔｒｉｅ−Ｐａｒｔｎｅｒ ＧｍｂＨ Ｒａｄｅｂｅｕｌ−Ｃｏｓｗｉｇ Method for producing electrolyte pouch cell for electric battery device, corresponding device and electrolyte pouch cell
KR102608812B1 (en) * 2015-06-09 2023-12-04 인더스트리-파트너 게엠베하 라데보일-코스빅 Electrolyte pouch-type cell manufacturing method, corresponding manufacturing device, and electrolyte pouch-type cell for electric battery devices
JP2017152140A (en) * 2016-02-23 2017-08-31 積水化学工業株式会社 Secondary battery, seal bar, and method of manufacturing secondary battery
WO2020125696A1 (en) * 2018-12-18 2020-06-25 宁德新能源科技有限公司 Battery cell and battery
US11342616B2 (en) 2018-12-18 2022-05-24 Ningde Amperex Technology Limited Cell and battery
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