WO2018049576A1 - Boîtier de batterie à bloc souple - Google Patents

Boîtier de batterie à bloc souple Download PDF

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Publication number
WO2018049576A1
WO2018049576A1 PCT/CN2016/098929 CN2016098929W WO2018049576A1 WO 2018049576 A1 WO2018049576 A1 WO 2018049576A1 CN 2016098929 W CN2016098929 W CN 2016098929W WO 2018049576 A1 WO2018049576 A1 WO 2018049576A1
Authority
WO
WIPO (PCT)
Prior art keywords
packaging film
battery case
soft pack
main body
pack battery
Prior art date
Application number
PCT/CN2016/098929
Other languages
English (en)
Chinese (zh)
Inventor
郭培培
何平
汪云龙
彭业军
谢斌
程文强
Original Assignee
东莞新能源科技有限公司
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 东莞新能源科技有限公司 filed Critical 东莞新能源科技有限公司
Priority to PCT/CN2016/098929 priority Critical patent/WO2018049576A1/fr
Publication of WO2018049576A1 publication Critical patent/WO2018049576A1/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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • 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 the field of battery manufacturing, and more particularly to a soft pack battery case.
  • the metal layer is exposed at the interface of the coating, and the metal layer is exposed to the risk of short-circuiting the electrical components, and the metal layer is easily exposed to the air and is corroded. There are safety quality issues.
  • the insulating metal foil is usually coated on the exposed metal layer, but the flexibility of the adhesive tape is poor, the bonding process is complicated, the automation requirement for the device is high, the production efficiency is low, and the product yield rate is not High; there is also a double hemming process to prevent the metal layer from being exposed, but the double hemming causes the thickness of the hemming to increase, reducing the volumetric energy density of the battery.
  • an object of the present invention is to provide a soft pack battery case which can save materials, reduce cost, improve automated production efficiency, and improve the volumetric energy of a battery using the soft pack battery case of the present invention. density.
  • the present invention provides a soft pack battery case which is formed by sealingly connecting an upper packaging film and a lower packaging film, and the upper packaging film and the lower packaging film each include an outer protective layer and an inner layer. And a fusion layer and a metal layer between the outer protective layer and the inner fusion layer, wherein the upper packaging film and the lower packaging film are sealingly connected by the inner fusion layer.
  • the soft pack battery case comprises: a main body portion, wherein the upper packaging film is provided with a groove for accommodating the electric core; the side sealing portion is located at both sides of the main body portion in the width direction, and is bonded to the side of the main body portion along the width direction on.
  • the lower packaging film on the side sealing portion exceeds the upper end surface of the upper packaging film in the thickness direction, and the excess portion is folded back between the upper packaging film and the side surface of the main body portion, and the excess portion is covered with the packaging film
  • the upper end surface is covered with a metal layer exposed on the upper end surface of the packaging film, and the metal layer exposed by the lower end surface of the lower packaging film in the thickness direction is sandwiched between the upper packaging film and the side surface of the main body portion.
  • the lower packaging film on the side seal portion covers the metal layer exposed on the upper end surface of the packaging film, and the metal layer exposed at the lower end surface of the lower package film is sandwiched Between the upper packaging film and the side surface of the main body portion, it is not necessary to affix the insulating adhesive paper on the upper end surface of the upper packaging film and the lower end surface of the lower packaging film, thereby saving material, reducing cost, improving automation production efficiency, and saving
  • the space occupied by the insulating tape increases the volumetric energy density of the battery to which the soft pack battery case of the present invention is applied.
  • the soft pack battery case according to the present invention can further improve the volume energy density of the battery to which the soft pack battery case of the present invention is applied.
  • the present invention provides a soft-pack battery case which is formed by sealingly connecting an upper packaging film and a lower packaging film, and the upper packaging film and the lower packaging film each include an outer protective layer and an inner layer. And a fusion layer and a metal layer between the outer protective layer and the inner fusion layer, wherein the upper packaging film and the lower packaging film are sealingly connected by the inner fusion layer.
  • the soft pack battery case comprises: a main body portion, wherein the upper packaging film is provided with a groove for accommodating the electric core; the side sealing portion is located at both sides of the main body portion in the width direction, and is bonded to the side of the main body portion along the width direction on.
  • the upper packaging film on the side sealing portion exceeds the upper end surface of the lower packaging film in the thickness direction, and the excess portion is folded back onto the lower packaging film, and the excess portion covers the upper end surface of the lower packaging film to cover the lower packaging
  • the metal layer exposed on the upper end surface of the film; the metal layer exposed on the lower end surface of the upper packaging film in the thickness direction is coated with an insulating paste.
  • the upper packaging film on the side seal portion covers the metal layer exposed on the upper end surface of the lower packaging film, and the metal layer exposed on the lower end surface of the upper packaging film is coated on the metal layer. Covered with insulating glue to prevent the metal layer from being exposed by the combination of the bent structure and the coated insulating glue, it is not necessary to apply an insulating adhesive tape on the lower end surface of the upper packaging film and the upper end surface of the lower packaging film.
  • the utility model can save material, reduce cost, improve automation production efficiency, save space occupied by the insulating adhesive paper, and improve the volume energy density of the battery of the soft pack battery case to which the present invention is applied.
  • the process of coating the insulating glue is simple, the applicability is strong, and the occupied space is small; at the same time, since only the portion of the upper packaging film beyond the upper end surface of the lower packaging film is folded back to the lower packaging film, the existing double folding The thickness of the lower packaging film is reduced as compared with the side process, so that the soft-pack battery case according to the present invention can further improve the volumetric energy density of the battery to which the soft-pack battery case of the present invention is applied.
  • FIG. 1 is a schematic view of an embodiment of a soft pack battery case in accordance with the present invention.
  • FIG. 2 is a schematic view of the front side seal portion of the soft pack battery case of FIG. 1 before being bonded to the main body portion;
  • Figure 3 is a cross-sectional view taken along line A-A of Figure 1;
  • FIG. 4 is a schematic illustration of another embodiment of a pouch battery housing in accordance with the present invention.
  • Figure 5 is a plan view showing the side seal portion of the soft pack battery case of Figure 4 before being bonded to the main body portion;
  • Figure 6 is an enlarged view of a circled portion of Figure 5;
  • FIG. 7 is a schematic illustration of yet another embodiment of a pouch battery housing in accordance with the present invention.
  • Figure 8 is a schematic view showing the side seal portion of the soft pack battery case of Figure 7 before being bonded to the main body portion;
  • Figure 9 is a cross-sectional view taken along line C-C of Figure 7.
  • the soft pack battery case according to the present invention is formed by sealingly connecting the upper package film 1 and the lower package film 2, and the upper package film 1 and the lower package film 2 each include an outer protective layer P1 and an inner fusion layer. P2 and a metal layer P3 between the outer protective layer P1 and the inner fusion layer P2, wherein the upper packaging film 1 and the lower packaging film 2 are hermetically connected by the inner fusion layer P2.
  • the soft pack battery case includes: a main body portion M, which The upper upper packaging film 1 is provided with a recess 14 for accommodating the battery core B; the side seal portion S is located on both sides in the width direction W of the main body portion M, and is bonded to the side surface M1 of the main body portion M in the width direction W.
  • the lower package film 2 on the side seal portion S exceeds the upper end surface 11 of the upper package film 1 in the thickness direction T, and the excess portion is folded back to the upper package film 1 and the main body portion M (on the side seal portion S) Between the side faces M1, the excess portion covers the upper end surface 11 of the packaging film 1 to cover the metal layer P3 exposed by the upper end surface 11 of the packaging film 1, and the lower packaging film 2 is exposed at the lower end surface 22 of the thickness direction T.
  • the metal layer P3 is sandwiched between the upper packaging film 1 and the side surface M1 of the main body portion M.
  • the lower package film 2 on the side seal portion S covers the metal layer P3 exposed by the upper end surface 11 of the packaging film 1, and the lower end surface 22 of the lower package film 2 is exposed
  • the metal layer P3 is sandwiched between the upper packaging film 1 and the side surface M1 of the main body portion M, so that it is not necessary to apply an insulating tape on the upper end surface 11 of the upper packaging film 1 and the lower end surface 22 of the lower packaging film 2, thereby saving material.
  • the cost is reduced, the automated production efficiency is improved, the space occupied by the insulating adhesive tape is saved, and the volumetric energy density of the battery to which the soft pack battery case of the present invention is applied is improved.
  • the soft pack battery case according to the present invention can further improve the volumetric energy density of the battery to which the soft pack battery case of the present invention is applied.
  • the exposure of the metal layer is liable to cause short circuit of the battery and corrosion of the battery case of the soft pack.
  • the inner fusion layer P2 of the upper packaging film 1 and the inner fusion layer P2 of the lower packaging film 2 are fused together.
  • the side seal portion S is bonded to the side surface M1 of the main body portion M in the width direction W by the glue G1.
  • the side seal portion S is usually bonded to the side surface M1 of the main body portion M by using a double-sided tape.
  • the adhesive strength of the double-sided tape is poor, and the problem that the side seal portion S is opened easily occurs.
  • the soft bag of the present invention The battery case is bonded to the side surface M1 of the main body portion M by the glue G1 having high adhesive property, and the adhesive force between the side seal portion S and the side surface M1 of the main body portion M can be effectively ensured.
  • Glue G1 can be a hot melt adhesive (such as polyurethane hot melt adhesive, ethylene and its copolymer hot melt adhesive).
  • the metal layer P3 exposed by the lower end film 23 of the lower wrap film 2 beyond the portion of the upper wrap film 1 is coated with an insulating paste G2. .
  • the width (the state in FIG. 2) of the lower packaging film 2 in the width direction W can be made larger than the upper packaging film 1, and the rear end surface 23 of the lower packaging film 2 beyond the upper packaging film 1 in the longitudinal direction L can expose the metal layer. Therefore, the insulating rubber G2 is coated on the rear end surface 23 to prevent the metal layer P3 from being exposed.
  • the insulating glue G2 is a hot melt adhesive or a UV adhesive, preferably an acrylate UV adhesive, a polyurethane hot melt adhesive or a hot melt adhesive of ethylene and a copolymer thereof.
  • the portion of the lower wrap film 2 that extends beyond the upper wrap film 1 in the longitudinal direction L is bent inwardly so that the rear end face 23 is bent.
  • the exposed metal layer P3 is sandwiched between the side surface M1 of the main body portion M and the lower packaging film 2.
  • the rear end surface 23 is bent inwardly onto the lower packaging film 2, and finally the side sealing portion S is bent.
  • the upper packaging film 1 and the lower packaging film 2 are bonded to the side surface M1 of the main body portion M; at this time, referring to FIG. 4, the rear end surface 23 is sandwiched between the side surface M1 of the main body portion M and the lower packaging film 2 Therefore, the metal layer P3 exposed by the rear end surface 23 is prevented from being exposed.
  • the side seal portion S is provided with an opening in the coating range of the glue G1.
  • the opening can increase the amount of application of the glue G1, thereby increasing the adhesion between the side seal portion S and the side surface M1 of the main body portion M.
  • the upper package film 1 and the lower package film 2 are an aluminum plastic film or a steel plastic film.
  • the soft pack battery case according to the present invention is formed by sealingly connecting the upper package film 1 and the lower package film 2, and the upper package film 1 and the lower package film 2 each include an outer protective layer P1 and an inner fusion layer. P2 and a metal layer P3 between the outer protective layer P1 and the inner fusion layer P2, wherein the upper packaging film 1 and the lower packaging film 2 are hermetically connected by the inner fusion layer P2.
  • the soft pack battery case includes a main body portion M on which the upper package film 1 is provided with a recess 14 for accommodating the battery core B, and a side seal portion S located on both sides of the main body portion M in the width direction W and bonded thereto.
  • the main body portion M is on the side surface M1 in the width direction W.
  • the upper packaging film 1 on the side seal portion S extends beyond the upper end surface 21 of the lower packaging film 2 in the thickness direction T, and the excess portion is folded back onto the lower packaging film 2 (on the side seal portion S), the excess The upper end surface 21 of the lower packaging film 2 is covered to cover the metal layer P3 exposed by the upper end surface 21 of the lower packaging film 2; the metal layer P3 exposed by the lower end surface 12 of the upper packaging film 1 in the thickness direction T is coated with Insulating glue G2.
  • the upper package film 1 on the side seal portion S covers the metal layer P3 exposed by the upper end surface 21 of the lower package film 2, and the lower end surface 12 of the upper package film 1 is exposed
  • the metal layer P3 is coated with an insulating glue G2 to prevent the metal layer P3 from being exposed by the combination of the bent structure and the coating insulating glue G2, so that the lower end surface 12 and the lower packaging film of the upper packaging film 1 are not required.
  • the adhesive tape is adhered to the upper end surface 21 of the second surface, which can save material, reduce cost, improve automation production efficiency, save space occupied by the insulating adhesive paper, and improve the volume energy density of the battery of the soft pack battery case to which the present invention is applied. .
  • the process of coating the insulating glue G2 is simple, the applicability is strong, and the occupied space is small; at the same time, since only the portion of the side sealing portion S beyond the upper end surface 21 of the lower packaging film 2 is folded back to the lower packaging film 2, so compared with the existing double-folding process, the thickness of the lower packaging film 2 is reduced (the lower packaging film 2 is not folded back), so the soft-pack battery case according to the present invention can further improve the application The volumetric energy density of the battery of the inventive soft pack battery case.
  • the side seal portion S is bonded to the side surface M1 of the main body portion M in the width direction W by the glue G1.
  • the side seal portion S is usually bonded to the side surface M1 of the main body portion M by using a double-sided tape.
  • the adhesive strength of the double-sided tape is poor, and the problem that the side seal portion S is opened easily occurs.
  • the soft bag of the present invention The battery case is bonded to the side surface M1 of the main body portion M by the glue G1 having high adhesive property, and the adhesive force between the side seal portion S and the side surface M1 of the main body portion M can be effectively ensured.
  • Glue G1 can be a hot melt adhesive (such as polyurethane hot melt adhesive, ethylene and its copolymer hot melt adhesive).
  • the metal layer P3 exposed by the rear end face 13 of the upper package film 1 beyond the lower package film 2 in the longitudinal direction L is coated with an insulating glue G2.
  • the lower wrap film 2 needs to be cut so that the width of the upper wrap film 1 in the width direction W (the state in FIG. 2) exceeds the lower wrap film 2
  • the rear end surface 13 of the above-mentioned packaging film 1 beyond the portion of the lower packaging film 2 in the longitudinal direction L exposes the metal layer, so that the insulating rubber G2 is coated on the rear end surface 13 to prevent the metal layer P3 from being exposed.
  • the insulating glue G2 is a hot melt adhesive or a UV adhesive, preferably an acrylate UV adhesive, a polyurethane hot melt adhesive or a hot melt adhesive of ethylene and a copolymer thereof.
  • the side seal portion S is provided with an opening in the coating range of the glue G1.
  • the opening can increase the coating amount of the glue G1, thereby improving the side seal portion S and The adhesive force between the side faces M1 of the main body portion M.
  • the upper package film 1 and the lower package film 2 are an aluminum plastic film or a steel plastic film.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un boîtier de batterie à bloc souple. Le boîtier de batterie est formé en reliant de manière étanche un film d'emballage supérieur (1) et un film d'emballage inférieur (2). Le film d'emballage supérieur (1) et le film d'emballage inférieur (2) comprennent chacun une couche de protection externe (P1), une couche de fusion interne (P2) et une couche métallique (P3) située entre la couche de protection externe (P1) et la couche de fusion interne (P2), le film d'emballage supérieur (1) et le film d'emballage inférieur (2) étant reliés de manière étanche par l'intermédiaire de la couche de fusion interne (P2). Le boîtier de batterie à bloc souple comprend : une partie de corps principal (M), le film d'emballage supérieur (1) étant pourvu d'une rainure (14) destinée à recevoir une cellule (B); et des parties d'étanchéité latérale (S) situées sur deux côtés, dans la direction de la largeur, de la partie de corps principal (M), et collée à des faces latérales (M1), dans la direction de la largeur, de la partie de corps principal (M). Le film d'emballage inférieur (2) sur la partie d'étanchéité latérale dépasse une face d'extrémité supérieure (11), dans la direction de l'épaisseur, du film d'emballage supérieur (1); la section dépassée est repliée entre le film d'emballage supérieur (1) et la face latérale (M1) de la partie de corps principal; la section dépassée recouvre la face d'extrémité supérieure (11) du film d'emballage supérieur pour recouvrir la couche métallique (P3) exposée hors de la face d'extrémité supérieure du film d'emballage supérieur; et la couche métallique (P3) exposée à l'extérieur d'une face d'extrémité inférieure (22), dans la direction de l'épaisseur, du film d'emballage inférieur (2) est serrée entre le film d'emballage supérieur (1) et la face latérale (M1) de la partie de corps principal.
PCT/CN2016/098929 2016-09-13 2016-09-13 Boîtier de batterie à bloc souple WO2018049576A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/098929 WO2018049576A1 (fr) 2016-09-13 2016-09-13 Boîtier de batterie à bloc souple

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/098929 WO2018049576A1 (fr) 2016-09-13 2016-09-13 Boîtier de batterie à bloc souple

Publications (1)

Publication Number Publication Date
WO2018049576A1 true WO2018049576A1 (fr) 2018-03-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111081940A (zh) * 2020-01-09 2020-04-28 惠州亿纬锂能股份有限公司 一种电池箱体结构及其组装和拆卸方法、蓄电池
EP3783683A4 (fr) * 2019-07-08 2021-02-24 Jiangsu Contemporary Amperex Technology Limited Batterie secondaire

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1767228A (zh) * 2004-09-22 2006-05-03 三星Sdi株式会社 用于二次电池的袋、使用该袋的二次电池及用于密封二次电池袋状壳体的装置
JP2007273606A (ja) * 2006-03-30 2007-10-18 Nippon Chemicon Corp ラミネートフィルム外装電子部品
CN201369344Y (zh) * 2009-02-27 2009-12-23 深圳市中天平步科技有限公司 一种软包装锂电芯的折边结构
CN102969533A (zh) * 2012-07-10 2013-03-13 东莞新能源科技有限公司 一种软包锂离子电池的折边结构及其制作方法
CN203674276U (zh) * 2014-01-20 2014-06-25 东莞新能源科技有限公司 软包装锂离子电池
CN105098253A (zh) * 2014-05-21 2015-11-25 东莞新能源科技有限公司 一种软包装锂离子电池用双折边装置
CN205429015U (zh) * 2015-12-31 2016-08-03 深圳市大富精工有限公司 电池及其电池壳

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1767228A (zh) * 2004-09-22 2006-05-03 三星Sdi株式会社 用于二次电池的袋、使用该袋的二次电池及用于密封二次电池袋状壳体的装置
JP2007273606A (ja) * 2006-03-30 2007-10-18 Nippon Chemicon Corp ラミネートフィルム外装電子部品
CN201369344Y (zh) * 2009-02-27 2009-12-23 深圳市中天平步科技有限公司 一种软包装锂电芯的折边结构
CN102969533A (zh) * 2012-07-10 2013-03-13 东莞新能源科技有限公司 一种软包锂离子电池的折边结构及其制作方法
CN203674276U (zh) * 2014-01-20 2014-06-25 东莞新能源科技有限公司 软包装锂离子电池
CN105098253A (zh) * 2014-05-21 2015-11-25 东莞新能源科技有限公司 一种软包装锂离子电池用双折边装置
CN205429015U (zh) * 2015-12-31 2016-08-03 深圳市大富精工有限公司 电池及其电池壳

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3783683A4 (fr) * 2019-07-08 2021-02-24 Jiangsu Contemporary Amperex Technology Limited Batterie secondaire
CN111081940A (zh) * 2020-01-09 2020-04-28 惠州亿纬锂能股份有限公司 一种电池箱体结构及其组装和拆卸方法、蓄电池

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