WO2017035835A1 - Composant à fils et composant en forme de bande-bobine - Google Patents

Composant à fils et composant en forme de bande-bobine Download PDF

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Publication number
WO2017035835A1
WO2017035835A1 PCT/CN2015/088969 CN2015088969W WO2017035835A1 WO 2017035835 A1 WO2017035835 A1 WO 2017035835A1 CN 2015088969 W CN2015088969 W CN 2015088969W WO 2017035835 A1 WO2017035835 A1 WO 2017035835A1
Authority
WO
WIPO (PCT)
Prior art keywords
flat conductor
resin film
lead
insulating resin
metal layer
Prior art date
Application number
PCT/CN2015/088969
Other languages
English (en)
Chinese (zh)
Inventor
木谷昌幸
宫泽圭太郎
田口晓彦
Original Assignee
住友电气工业株式会社
住友电工(上海)电子线制品有限公司
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 住友电气工业株式会社, 住友电工(上海)电子线制品有限公司 filed Critical 住友电气工业株式会社
Priority to PCT/CN2015/088969 priority Critical patent/WO2017035835A1/fr
Publication of WO2017035835A1 publication Critical patent/WO2017035835A1/fr

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Classifications

    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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

  • the present invention relates to a lead member and a rolled member.
  • a nonaqueous electrolyte battery such as a lithium ion battery is known in which a positive electrode plate, a negative electrode plate, and an electrolytic solution are housed in an outer casing (encapsulated body) composed of a multilayer film, and are connected to a positive electrode plate and a negative electrode plate.
  • the lead member is sealed and taken out to the outside.
  • a tab lead having a flat conductor and an insulating resin film covering the central portion of the flat conductor from both surfaces thereof is used.
  • a portion of the insulating resin film serves as a sealing portion with the exterior body.
  • the flat conductor aluminum or an aluminum alloy is usually used for the positive electrode side, and nickel-plated copper is used for the negative electrode side.
  • Patent Document 1 discloses a coil-shaped member for a lead member.
  • a conductive metal which is easily soldered is partially formed on a surface of a strip-shaped flat conductor made of aluminum or an aluminum alloy at a predetermined interval.
  • the metal layer is interposed between the metal layers, and the insulating resin film is bonded from both sides of the flat conductor.
  • the formation of the metal layer is carried out by spraying Ni or the like onto the lead member by cold spraying, and forming a metal layer of Ni or the like on the entire surface of the lead member exposed from the battery.
  • Patent Document 2 discloses a technique in which a plurality of conductors for a lead member are arranged side by side, and an insulating film is attached to the conductors at a time, and the insulating film is cut with high precision.
  • Patent Document 1 Japanese Patent Laid-Open Publication No. 2012-3877
  • Patent Document 2 Japanese Laid-Open Patent Publication No. 2011-249115
  • the lead member is bent at the sealing portion or the portion exposed from the sealing portion.
  • the present invention has been made in view of the above-described circumstances, and an object thereof is to provide an insulating resin film having a flat conductor and bonded from both surfaces of the flat conductor, and being partially formed on the surface of the flat conductor
  • the lead member of the metal layer made of a soldered conductive metal when the lead member is bent and used, it is possible to avoid the case where the metal layer peels off and flies.
  • the lead member according to the present invention has a flat conductor made of aluminum or an aluminum alloy, and an insulating resin film bonded from both surfaces of the flat conductor, and the lead member is on the surface of the flat conductor from the insulating resin film.
  • a metal layer made of a conductive metal which is easy to be soldered is formed at intervals in which the end portions are spaced apart by 2 mm or more.
  • the tape-like member according to the present invention has a strip-shaped flat conductor made of aluminum or an aluminum alloy, and a metal layer partially formed on the surface of the flat conductor at a predetermined interval, and is easily soldered. a conductive metal film to be welded; and an insulating resin film which is bonded from both surfaces of the flat conductor between the respective metal layers, and the tape-shaped member from the end portion of the insulating resin film to the metal layer The interval is greater than or equal to 2 mm, and the flat conductor is exposed at the portion of the interval.
  • the metal layer formed of the conductive metal which is easy to be soldered is partially formed on the surface of the flat conductor When the lead member is bent and used, it is possible to avoid the case where the metal layer peels off and flies.
  • Fig. 1A is a view showing the manufacture of a rolled member according to an embodiment of the present invention.
  • FIG. 1B is a schematic view showing one configuration example of a tape-like member according to an embodiment of the present invention.
  • Fig. 1C is a schematic view showing a configuration example of a lead member cut out from the wound member of Fig. 1B.
  • Fig. 2A is a cross-sectional view showing an example of a nonaqueous electrolyte battery using the lead member of Fig. 1C.
  • FIG. 2B is a cross-sectional view showing a state in which a lead member is bent in the nonaqueous electrolyte battery of FIG. 2A.
  • the lead member according to the present invention has a flat conductor made of aluminum or an aluminum alloy, and an insulating resin film bonded from both surfaces of the flat conductor, wherein the lead member has the insulating layer on the surface of the flat conductor
  • a metal layer made of a conductive metal which is easy to be soldered is formed at an interval of the resin film at intervals of 2 mm or more. Therefore, when the lead member is bent and used, it is possible to avoid the case where the metal layer is peeled off and flies.
  • the conductive metal is a combination of any one or a combination of Ni, Sn, Au, Zn, Ag, and Cu.
  • the metal layer can be easily formed locally on the flat conductor by partial plating, cold spraying, cold welding or the like.
  • the tape-like member according to the present invention has a strip-shaped flat conductor made of aluminum or an aluminum alloy, and a metal layer partially formed on the surface of the flat conductor at a predetermined interval, and is easy to be formed.
  • a conductive metal structure for soldering and an insulating resin film which is bonded from both surfaces of the flat conductor between the metal layers, and the strip-shaped member is from the end of the insulating resin film to the metal
  • the interval between the layers is greater than or equal to 2 mm, and the flat conductor is exposed at the portion of the interval. Therefore, when the lead member cut out from the rolled member is bent and used, it is possible to avoid occurrence of the The case where the metal layer peels off and flies off.
  • the conductive metal is a combination of any one or a combination of Ni, S n , Au, Zn, Ag, and Cu.
  • the metal layer can be easily formed partially on the flat conductor by partial plating, cold spraying, cold welding or the like.
  • FIGS. 1A to 2B are views showing an example of a configuration of an intermediate member (referred to as a metal tape roll member) in the middle of a roll-shaped member according to an embodiment of the present invention
  • FIG. 1B shows the completion of the rolled member.
  • a diagram of a structural example of a product is shown in FIG. 1A.
  • FIG. 1C is a schematic view showing one configuration example of a lead member (a tab lead) cut out from the wound member.
  • the metal coiled member 10a has a strip-shaped flat conductor 11 made of aluminum or an aluminum alloy, and a metal layer 7 made of a conductive metal which is easy to be soldered.
  • the metal layer 7 is partially formed at a predetermined interval on the surface (single or both sides) of the flat conductor 11.
  • the metal strip-shaped member 10a winds the strip-shaped flat conductor 11 in which the metal layer 7 is partially formed as described above into a coil shape.
  • the metal layer 7 may be, for example, any one of Ni, Sn, Au, Zn, Ag, and Cu, or an alloy obtained by combining a plurality of these metals.
  • the metal layer 7 is not limited to this example as long as it is electrically conductive and can be easily soldered.
  • the coiled member 10b As illustrated in FIG. 1B, the coiled member 10b according to the present embodiment is bonded to the metal coiled member 10a of FIG. 1A by the insulating resin film 6 for sealing on the battery exterior body. It is wound up in a roll shape.
  • the insulating resin film 6 is bonded from both surfaces of the flat conductor 11 between the respective metal layers 7 (between the adjacent metal layers 7).
  • the interval d from the end portion of the insulating resin film 6 to the metal layer 7 is greater than or equal to 2 mm, and the portion of the flat conductor 11 at the interval d is exposed.
  • the interval d refers to a short (exposed to the outside when mounted on the battery exterior body)
  • the interval of one side of the part, of course, the longer interval is also greater than or equal to 2 mm.
  • the upper limit of the interval d is 10 mm. This size is sufficient in actual use.
  • the tape-like member 10b is cut at the cutting position K of the broken line, and is set as an independent lead member (pole lead) 3 as illustrated in Fig. 1C. Further, the exemplified cutting position K is the boundary of the metal layer 7, but as long as the metal layer 7 does not span the two tab leads, the exposed portion of the flat conductor 11 may be cut with a certain amount of margin.
  • the tab lead 3 is sealed in a non-aqueous electrolyte battery or the like in a manner to be described later, but is formed in the middle of a flat lead conductor (hereinafter referred to as a lead conductor) 5 based on the flat conductor 11 .
  • a lead conductor flat lead conductor
  • the insulating resin film 6 is attached as a sealing portion, and a metal layer (softened joint portion) 7 made of a metal material which is easily soldered is provided at an end portion exposed to the outside. Further, as described above as the main feature, the interval d between the solder joint portion 7 and the insulating resin film 6 is greater than or equal to 2 mm.
  • the monolithic lead wire shown in Fig. 1C can be constructed using a structure having a thickness of 0.08 to 0.2 mm, a conductor width of 1.0 mm to 5 mm, and a conductor length of 15 mm to 70 mm.
  • FIGS. 2A and 2B The mounting state when the tab lead 3 is sealed in a nonaqueous electrolyte battery such as a lithium ion battery will be described with reference to FIGS. 2A and 2B.
  • 2A is a cross-sectional view showing an example of a non-aqueous electrolyte battery using the lead member (pole lead) 3 of FIG. 1C
  • FIG. 2B is a cross-sectional view showing a state in which the lead member 3 is bent in the non-aqueous electrolyte battery. .
  • the nonaqueous electrolyte battery 1 illustrated in FIG. 2A is configured such that a positive electrode plate and a negative electrode plate laminated with a separator and an electrolytic solution are housed in an exterior body 2 composed of a multilayer film including a metal foil, and the positive electrode side is provided.
  • the tab lead 3 and the tab lead (not shown) of the negative electrode are sealed and sealed on the sealing portion 2d of the exterior body 2 via the insulating resin film 6, and taken out from the exterior body 2.
  • the conductor of the tab lead 3 on the positive electrode side is formed of a metal material which is not dissolved in the electrolytic solution at a high potential, that is, an alloy of aluminum or aluminum, because a high potential is applied.
  • Most of the tab leads on the negative side are nickel-plated copper.
  • an alloy of aluminum or aluminum is used for the conductors of the tab wires on the positive electrode side and the negative electrode side. Therefore, even the tab lead on the negative side can be used as the tab lead 3 The configuration described.
  • the exterior body 2 is an exterior case of the nonaqueous electrolyte battery 1, and is sealed by, for example, sealing the sealing portion 2d around the two rectangular multilayer films by heat welding.
  • the insulating resin film 6 is bonded to the tab lead of the positive electrode and the tab wire of the negative electrode by thermal fusion bonding in advance.
  • the insulating resin film 6 and the multilayer film of the exterior body 2 are thermally welded, and these tab leads are hermetically sealed.
  • the tab lead 3 on the positive electrode side is cut out from the tape-like member 10b, as shown in Fig. 1C, by a process of forming a lead conductor 5 which cuts an aluminum conductor into a rectangular shape, and at the lead conductor 5
  • Two insulating resin films 6 are bonded to the removed portions of the exterior body 2 on both sides.
  • a portion exposed to the outside of the outer casing 2 that is, a portion on the side where the insulating resin film 6 is bordered on the portion electrically connected to the outside, has a metal layer which can be soldered.
  • the joint 7 is soldered.
  • the boundary and the solder joint portion 7 have an interval d of 2 mm or more. The state in which the aluminum conductor is held on the other end side of the boundary with the insulating resin film 6 is connected to the electrode plate lead 8 in the battery.
  • the insulating resin film 6 can be formed, for example, of two layers of the inner layer 6a bonded or welded to the lead conductor 5 and the outer layer 6b welded to the outer casing 2.
  • the inner layer 6a is in close contact with the lead conductor 5 by heat fusion in advance, and encapsulates the conductor.
  • the outer layer 6b is made of a material having a melting point higher than the melting point of the inner layer 6a, and retains its shape when it is packaged with the lead conductor 5. Further, at the time of sealing with the exterior body 2, the outer layer 6b and the exterior body 2 can be welded, and the metal foil layer 2b and the lead conductor 5 in the exterior body 2 are not electrically short-circuited.
  • the insulating resin film can be formed in one layer or three layers. In the case of three layers, the melting point of the intermediate layer is set to be higher than the melting point of the two layers (outer layer or inner layer).
  • the multilayer film forming the exterior body 2 is composed of at least three layers of a laminate which is a material which does not dissolve in the electrolytic solution and is suitable for preventing leakage of the electrolytic solution from the sealing portion 2d.
  • a laminate which is a material which does not dissolve in the electrolytic solution and is suitable for preventing leakage of the electrolytic solution from the sealing portion 2d.
  • the metal foil layer 2b is made of a metal foil such as aluminum, copper or stainless steel to improve the sealing property to the electrolytic solution.
  • the outermost layer film 2c is a structure for protecting the thin metal foil layer 2b, and is formed of polyethylene terephthalate (PET) or the like.
  • the above nonaqueous electrolyte battery 1 has, for example, a battery temperature for connection in actual use.
  • the monitoring of the degree of charge, the control of charge and discharge, and the protection of the protective circuit board (not shown) of the battery are integrated, or the tab lead 3 on the positive side of the plurality of batteries and the tab lead on the negative side are electrically connected in series. Connection and use, etc. Even in the case as described above, if the tab wire of aluminum having the solder joint portion 7 capable of soldering is used, the conductor of the protective circuit which can be connected to the above-mentioned protective circuit substrate by soldering can be used. Easy to assemble on the pattern.
  • the tab lead 3 can be bent at a portion where the lead conductor 5 is exposed when it is bent and used as illustrated in FIG. 2B. Therefore, it is possible to prevent the solder joint portion 7 from being flake off. The situation of falling.
  • the thickness of the flat conductor 11 is about 0.1 mm to 0.2 mm, and may be appropriately determined so as to be bent only at the exposed portion in correspondence with the interval d.
  • the tab lead 3 illustrated in FIGS. 2A and 2B is not limited to the structure cut out from the rolled member 10b illustrated in FIG. 1B, and may be manufactured one by one.
  • the plurality of flat conductors 11 may be arranged in parallel and travel, and the insulating resin film 6 may be pasted from both sides across the plurality of flat conductors 11 (transversely intersecting the plurality of flat conductors 11). .
  • the above-described interval d can be kept constant with high precision.
  • the formation of the solder joint portion 7 is easy to be performed before the insulating resin film 6 is bonded, but it may be performed after bonding.
  • a plurality of flat conductors are arranged in parallel to collectively adhere an insulating resin film (a plurality of flat conductors are bridged by an insulating resin film).
  • An insulating resin film is attached at a plurality of places at a constant interval in the longitudinal direction of the flat conductor.
  • the insulating resin film is cut, and a tape wound member in which an insulating resin film is adhered to a plurality of flat conductors can be obtained.
  • a soldering metal layer (cold spray or the like) is provided at a portion spaced apart from the insulating resin film by a certain distance (for example, 2 mm).
  • a certain distance for example, 2 mm.
  • the interval from the insulating resin film to the metal layer for soldering is required to be constant at each portion.
  • the method of disposing the metal layer on each of the flat conductors after the insulating resin film is pasted is easy to be insulated. The distance from the resin film to the metal layer was made constant.
  • 1...nonaqueous electrolyte battery 2...extrind body, 2a... innermost layer film, 2b...metal foil layer, 2c... outermost layer film, 2d...sealing portion, 3...electrode side lead wire (lead member), 5...lead conductor (flat conductor), 6...insulating resin film, 6a...inner layer, 6b...outer layer, 7...metal layer (solder joint), 8...electrode plate lead, 10a...metal strip roll , 10b... with a roll-shaped member, 11... a strip-shaped flat conductor.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

La présente invention concerne un composant à fils ayant un conducteur plat (11) et un film de résine isolante (6) collé sur deux faces du conducteur plat (11). Une couche de métal (7) constituée par un métal conducteur qui est facile à souder est partiellement formée sur une surface du conducteur plat (11). Dans le composant à fils, lorsque le composant à fils est utilisé de manière incurvée, la possibilité, par exemple, de détachement de la couche de métal (7) peut également être évitée. Le composant à fils impliqué (un fil de cosse d'électrode (3)) comporte le conducteur plat (11) composé d'aluminium ou d'un alliage d'aluminium et le film de résine isolante (6) collé sur les deux faces du conducteur plat (11). Sur la surface du conducteur plat (11), la couche de métal (une partie de connexion par soudage) (7) constituée par un métal conducteur qui est facile à souder, est formée en séparant un intervalle qui est supérieur ou égal à 2 mm d'une partie d'extrémité du film de résine isolante (6).
PCT/CN2015/088969 2015-09-06 2015-09-06 Composant à fils et composant en forme de bande-bobine WO2017035835A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/088969 WO2017035835A1 (fr) 2015-09-06 2015-09-06 Composant à fils et composant en forme de bande-bobine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/088969 WO2017035835A1 (fr) 2015-09-06 2015-09-06 Composant à fils et composant en forme de bande-bobine

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WO2017035835A1 true WO2017035835A1 (fr) 2017-03-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109585908A (zh) * 2018-12-27 2019-04-05 深圳瑞隆新能源科技有限公司 一种软包装锂离子电芯及电池
CN113966567A (zh) * 2021-03-24 2022-01-21 宁德新能源科技有限公司 电芯与用电装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102290552A (zh) * 2010-06-15 2011-12-21 住友电气工业株式会社 铝极耳用箍状部件
CN202839816U (zh) * 2011-08-09 2013-03-27 住友电气工业株式会社 引线部件
CN204257745U (zh) * 2014-11-21 2015-04-08 住友电气工业株式会社 极耳引线以及蓄电设备
CN104704647A (zh) * 2012-10-10 2015-06-10 株式会社自动网络技术研究所 蓄电模块

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102290552A (zh) * 2010-06-15 2011-12-21 住友电气工业株式会社 铝极耳用箍状部件
CN202839816U (zh) * 2011-08-09 2013-03-27 住友电气工业株式会社 引线部件
CN104704647A (zh) * 2012-10-10 2015-06-10 株式会社自动网络技术研究所 蓄电模块
CN204257745U (zh) * 2014-11-21 2015-04-08 住友电气工业株式会社 极耳引线以及蓄电设备

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109585908A (zh) * 2018-12-27 2019-04-05 深圳瑞隆新能源科技有限公司 一种软包装锂离子电芯及电池
CN113966567A (zh) * 2021-03-24 2022-01-21 宁德新能源科技有限公司 电芯与用电装置
CN113966567B (zh) * 2021-03-24 2023-06-20 宁德新能源科技有限公司 电芯与用电装置

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