US20110123844A1 - Pressure-relief mechanism to improve safety in lithium-polymer battery cells - Google Patents

Pressure-relief mechanism to improve safety in lithium-polymer battery cells Download PDF

Info

Publication number
US20110123844A1
US20110123844A1 US12/622,788 US62278809A US2011123844A1 US 20110123844 A1 US20110123844 A1 US 20110123844A1 US 62278809 A US62278809 A US 62278809A US 2011123844 A1 US2011123844 A1 US 2011123844A1
Authority
US
United States
Prior art keywords
pouch
battery cell
seal
weakness
includes
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.)
Abandoned
Application number
US12/622,788
Inventor
Ramesh C. Bhardwaj
Taisup Hwang
Richard M. Mank
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.)
Apple Inc
Original Assignee
Apple Inc
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 Apple Inc filed Critical Apple Inc
Priority to US12/622,788 priority Critical patent/US20110123844A1/en
Assigned to APPLE INC. reassignment APPLE INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MANK, RICHARD M., BHARDWAJ, RAMESH C., HWANG, TAISUP
Publication of US20110123844A1 publication Critical patent/US20110123844A1/en
Application status is Abandoned legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/12Vent plugs or other mechanical arrangements for facilitating escape of gases
    • H01M2/1235Emergency or safety arrangements of non-resealable design
    • H01M2/1241Emergency or safety arrangements of non-resealable design in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/34Gastight accumulators
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0202Cases, jackets or wrappings for small-sized cells or batteries, e.g. miniature battery or power cells, batteries or cells for portable equipment
    • H01M2/0207Flat-shaped cells or batteries of flat cells
    • H01M2/021Flat-shaped cells or batteries of flat cells with both terminals passing through the case or cover
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0202Cases, jackets or wrappings for small-sized cells or batteries, e.g. miniature battery or power cells, batteries or cells for portable equipment
    • H01M2/0207Flat-shaped cells or batteries of flat cells
    • H01M2/0212Flat-shaped cells or batteries of flat cells with plate-like or sheet-like terminals
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0257Cases, jackets or wrappings characterised by the material
    • H01M2/0275Cases, jackets or wrappings characterised by the material of flexible envelopes or bags around open cell elements
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/10Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M2/1016Cabinets, cases, fixing devices, adapters, racks or battery packs
    • H01M2/1022Cabinets, cases, fixing devices, adapters, racks or battery packs for miniature batteries or batteries for portable equipment
    • H01M2/1061Cabinets, cases, fixing devices, adapters, racks or battery packs for miniature batteries or batteries for portable equipment for cells of prismatic configuration or for sheet-like batteries
    • H01M2/1066Cabinets, cases, fixing devices, adapters, racks or battery packs for miniature batteries or batteries for portable equipment for cells of prismatic configuration or for sheet-like batteries forming a whole with or incorporated in or fixed to the electronic appliance
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0257Cases, jackets or wrappings characterised by the material
    • H01M2/0287Cases, jackets or wrappings characterised by the material comprising layers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/49108Electric battery cell making
    • Y10T29/4911Electric battery cell making including sealing

Abstract

The disclosed embodiments relate to a battery cell which includes a weakness for relieving pressure. This battery cell includes a jelly roll comprising layers which are wound together, including a cathode with an active coating, a separator and an anode with an active coating. The jelly roll also includes a first conductive tab coupled to the cathode and a second conductive tab coupled to the anode. The jelly roll is enclosed in a flexible pouch, wherein the first and second conductive tabs extend through seals in the pouch to provide terminals for the battery cell. This pouch includes a weakness which yields when internal pressure in the pouch exceeds a threshold to create a hole which releases the internal pressure.

Description

    BACKGROUND
  • 1. Field
  • The disclosed embodiments relate to techniques for improving safety in rechargeable lithium-polymer battery cells. More specifically, the disclosed embodiments relate to the design of a pressure-relief mechanism which improves the safety in lithium-polymer battery cells.
  • 2. Related Art
  • Rechargeable batteries are presently used to provide power to a wide variety of portable electronic devices, including laptop computers, cell phones, PDAs, digital music players and cordless power tools. The most commonly used type of rechargeable battery is a lithium battery, which can include a lithium-ion or a lithium-polymer battery.
  • A potential safety issue can arise if there is a gas buildup within a rechargeable lithium battery cell. This can occur, for example, if the cell is overcharged, if there is a short within the cell, or if the cell is left uncharged for a significant period of time. This type of gas buildup can potentially cause the battery cell to swell or even to explode, which can seriously damage the portable electronic device, and may even start a fire.
  • To alleviate this problem, cylindrical lithium-ion battery cells are often equipped with a vent valve to release the internal pressure in the battery cell when a gas buildup occurs. However, there exist no comparable pressure-relief mechanisms for lithium-polymer batteries, which are becoming increasingly popular in portable electronic devices. A lithium-polymer battery is typically enclosed in a flexible pouch, which is lightweight and inexpensive to manufacture. However, no pressure-relief mechanism has been developed for these pouches so far.
  • SUMMARY
  • The disclosed embodiments relate to a battery cell which includes a weakness for relieving pressure. This battery cell includes a jelly roll comprising layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating. The jelly roll also includes a first conductive tab coupled to the cathode and a second conductive tab coupled to the anode. The jelly roll is enclosed in a flexible pouch, wherein the first and second conductive tabs extend through seals in the pouch to provide terminals for the battery cell. This pouch includes a weakness which yields when internal pressure in the pouch exceeds a threshold to create a hole which releases the internal pressure.
  • In some embodiments, the pouch includes multiple weaknesses at different locations on the pouch.
  • In some embodiments, the weakness can include: a V-shaped notch cut into a seal for the pouch; a half-circle cut into a seal for the pouch; a pattern of tiny holes formed in a seal for the pouch; and a thinned region of the pouch material.
  • In some embodiments, the weakness can be located on: a side seal for the pouch; a terrace seal for the pouch; a corner of the pouch; a fold in the pouch material; and a location on a surface of the pouch which is not part of a seal.
  • In some embodiments, the pouch is comprised of a layer of aluminum and a layer of polypropylene.
  • In some embodiments, the battery cell is a lithium-polymer battery cell, or a silver-zinc battery cell.
  • BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 illustrates a battery cell in accordance with the disclosed embodiments.
  • FIG. 2 illustrates a battery cell with V-shaped notches cut into seals for a pouch in accordance with the disclosed embodiments.
  • FIG. 3 illustrates a battery cell with half-circles cut into seals for a pouch in accordance with the disclosed embodiments.
  • FIG. 4 illustrates a battery cell with patterns of tiny holes formed in a seal for a pouch in accordance with the disclosed embodiments.
  • FIG. 5 illustrates a battery cell including a pouch with corner cuts in accordance with the disclosed embodiments.
  • FIG. 6 illustrates a battery cell with weak regions formed in the pouch material in accordance with the disclosed embodiments.
  • FIG. 7 illustrates a portable computing device in accordance with the disclosed embodiments.
  • DETAILED DESCRIPTION
  • The following description is presented to enable any person skilled in the art to make and use the disclosed embodiments, and is provided in the context of a particular application and its requirements. Various modifications to the disclosed embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the disclosed embodiments. Thus, the disclosed embodiments are not limited to the embodiments shown, but are to be accorded the widest scope consistent with the principles and features disclosed herein.
  • The data structures and code described in this detailed description are typically stored on a computer-readable storage medium, which may be any device or medium that can store code and/or data for use by a computer system. The computer-readable storage medium includes, but is not limited to, volatile memory, non-volatile memory, magnetic and optical storage devices such as disk drives, magnetic tape, CDs (compact discs), DVDs (digital versatile discs or digital video discs), or other media capable of storing code and/or data now known or later developed.
  • The methods and processes described in the detailed description section can be embodied as code and/or data, which can be stored in a computer-readable storage medium as described above. When a computer system reads and executes the code and/or data stored on the computer-readable storage medium, the computer system performs the methods and processes embodied as data structures and code and stored within the computer-readable storage medium. Furthermore, the methods and processes described below can be included in hardware modules. For example, the hardware modules can include, but are not limited to, application-specific integrated circuit (ASIC) chips, field-programmable gate arrays (FPGAs), and other programmable-logic devices now known or later developed. When the hardware modules are activated, the hardware modules perform the methods and processes included within the hardware modules.
  • Battery Cell
  • FIG. 1 illustrates a battery cell 100 in accordance with the disclosed embodiments. Battery cell 100 includes a jelly roll 101 comprising a number of layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating. Jelly rolls are well known in the art and will not be described further. During assembly of battery cell 100, jelly roll 101 is enclosed in a flexible pouch, which is formed by folding a flexible sheet along a fold line 108. For example, the flexible sheet can be comprised of aluminum with a polymer film, such as polypropylene. After the flexible sheet is folded, the flexible sheet can be sealed, for example by applying heat along side seals 102 and along a terrace seal 104.
  • Note that jelly roll 101 includes conductive tabs 103 coupled to the cathode and the anode. These conductive tabs 103 extend through seals in the pouch (for example, formed using sealing tape 104) to provide terminals for battery cell 100.
  • Also note that a battery pack can be formed by coupling together a number of such battery cells: in series, in parallel, or both in series and in parallel. The coupled cells can then be enclosed in a hard case.
  • Battery Cell Including a Weakness
  • As mentioned above, a gas buildup can potentially occur within battery cell 100 if: battery cell 100 is overcharged; there is a short within battery cell 100; or battery cell 100 is left uncharged for a significant period of time. This gas buildup can potentially cause the battery cell to swell or even explode. To deal with this problem, the pouch includes one or more preformed weaknesses which yield when internal pressure in the pouch exceeds a threshold value to create a hole which releases the internal pressure.
  • There are a number of different ways to create such a weakness. For example, a number of V-shaped notches, including V-shaped notch 202, can be cut into the seals for the pouch as is illustrated in FIG. 2. These V-shaped notches can be cut using some type of cutting tool after the pouch is formed. Alternatively, a number half-circles, including half-circle 302, can be cut into the seals for the pouch as is illustrated in FIG. 3. In yet another embodiment which is illustrated in FIG. 4, instead of cutting notches in the seals, weaknesses can be created by forming a pattern of tiny holes 402 in the seals.
  • Weaknesses can also be formed at other locations on the battery cell pouch. For example, FIG. 5 illustrates a battery cell having a pouch with weaknesses which are formed as corner cuts 502. Alternatively, FIG. 6 illustrates a battery cell with weak regions 602 which are formed at various locations on the pouch material. These weak regions 602 can be formed, for example, by thinning the pouch material.
  • In general, such weaknesses can be formed at any location on the battery pouch, including at: a side seal for the pouch; a terrace seal for the pouch; a corner of the pouch; a fold in the pouch material; and any location on a surface of the pouch which is not part of a seal. Moreover, although a number of different types of weaknesses are illustrated in FIGS. 2-6, in general any type of weakness which yields to internal pressure in the battery cell can be used by the disclosed embodiments.
  • Computing Device
  • The above-described rechargeable battery cell can generally be used in any type of electronic device. For example, FIG. 7 illustrates a portable computing device 700 which includes a processor 702, a memory 704 and a display 708, which are all powered by a battery 706. Battery 706 comprises a battery pack, which includes multiple battery cells that are coupled together in series and/or in parallel.
  • The foregoing descriptions of embodiments have been presented for purposes of illustration and description only. They are not intended to be exhaustive or to limit the present description to the forms disclosed. Accordingly, many modifications and variations will be apparent to practitioners skilled in the art. Additionally, the above disclosure is not intended to limit the present description. The scope of the present description is defined by the appended claims.

Claims (22)

1. A battery cell with a weakness for relieving pressure, comprising:
a jelly roll comprising layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating;
a pouch, which encloses the jelly roll, wherein the pouch is flexible;
a first conductive tab coupled to the cathode; and
a second conductive tab coupled to the anode;
wherein the first and second conductive tabs extend through seals in the pouch to provide terminals for the battery cell; and
wherein the pouch includes a weakness which yields when internal pressure in the pouch exceeds a threshold to create a hole which releases the internal pressure.
2. The battery cell of claim 1, wherein the pouch includes multiple weaknesses at different locations on the pouch.
3. The battery cell of claim 1, wherein the weakness includes one of:
a V-shaped notch cut into a seal for the pouch;
a half-circle cut into a seal for the pouch;
a corner of the pouch which is cut;
a pattern of tiny holes formed in a seal for the pouch; and
a thinned region of the pouch material.
4. The battery cell of claim 1, wherein the weakness is located on one of:
a side seal for the pouch;
a terrace seal for the pouch;
a corner of the pouch;
a fold in the pouch material; and
a location on a surface of the pouch which is not part of a seal.
5. The battery cell of claim 1, wherein the pouch is comprised of:
a layer of aluminum; and
a layer of polypropylene.
6. The battery cell of claim 1, wherein the battery cell is one of:
a lithium-polymer battery cell; and
a silver-zinc battery cell.
7. A battery pack comprising one or more battery cells coupled together and enclosed in a hard case, wherein each of the one or more battery cells includes:
a jelly roll comprising layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating;
a pouch, which encloses the jelly roll, wherein the pouch is flexible;
a first conductive tab coupled to the cathode; and
a second conductive tab coupled to the anode;
wherein the first and second conductive tabs extend through seals in the pouch to provide terminals for the battery cell; and
wherein the pouch includes a weakness which yields when internal pressure in the pouch exceeds a threshold to create a hole which releases the internal pressure.
8. The battery pack of claim 7, wherein the one or more battery cells are coupled together:
in series;
in parallel; or
in series and parallel.
9. The battery pack of claim 7, wherein each pouch includes multiple weaknesses at different locations on the pouch.
10. The battery pack of claim 7, wherein the weakness includes one of:
a V-shaped notch cut into a seal for the pouch;
a half-circle cut into a seal for the pouch;
a corner of the pouch which is cut;
a pattern of tiny holes formed in a seal for the pouch; and
a thinned region of the pouch material.
11. The battery pack of claim 7, wherein the weakness is located on one of:
a side seal for the pouch;
a terrace seal for the pouch;
a corner of the pouch;
a fold in the pouch material; and
a location on a surface of the pouch which is not part of a seal.
12. The battery pack of claim 7, wherein the pouch is comprised of:
a layer of aluminum; and
a layer of polypropylene,
13. The battery pack of claim 7, wherein each battery cell is one of:
a lithium-polymer battery cell; and
a silver-zinc battery cell.
14. A portable computing device, comprising:
a processor;
a memory; and
a battery pack, which includes one or more battery cells coupled together;
wherein each of the one or more battery cells includes:
a jelly roll comprising layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating;
a pouch, which encloses the jelly roll, wherein the pouch is flexible;
a first conductive tab coupled to the cathode; and
a second conductive tab coupled to the anode;
wherein the first and second conductive tabs extend through seals in the pouch to provide terminals for the battery cell; and
wherein the pouch includes a weakness which yields when internal pressure in the pouch exceeds a threshold to create a hole which releases the internal pressure.
15. The portable computing device of claim 14, wherein the portable device includes one of:
a laptop or notebook computer system;
a personal digital assistant; and
a cellular telephone.
16. A method for assembling a battery cell, comprising:
obtaining a jelly roll comprising layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating, wherein the jelly roll includes a first conductive tab coupled to the cathode and a second conductive tab coupled to the anode;
obtaining a pouch to accommodate the jelly roll, wherein the pouch is flexible; and
sealing the jelly roll in the pouch, wherein the pouch is sealed so that the first and second conductive tabs extend through seals in the pouch to provide terminals for the battery cell;
wherein the pouch includes or is configured to include one or more weaknesses, which yield when internal pressure in the pouch exceeds a threshold to create a hole which releases the internal pressure.
17. The method of claim 16, wherein the weakness in the pouch is created:
prior to sealing the jelly roll in the pouch; or
after sealing the jelly roll in the pouch.
18. The method of claim 16, wherein creating the weakness in the pouch involves creating multiple weaknesses at different locations on the pouch.
19. The method of claim 16, wherein the weakness includes one of:
a V-shaped notch cut into a seal for the pouch;
a half-circle cut into a seal for the pouch;
a corner of the pouch which is cut;
a pattern of tiny holes formed in a seal for the pouch; and
a thinned region of the pouch material.
20. The method of claim 16, wherein the weakness is located on one of:
a side seal for the pouch;
a terrace seal for the pouch;
a corner of the pouch;
a fold in the pouch material; and
a location on a surface of the pouch which is not part of a seal.
21. The method of claim 16, wherein the pouch is comprised of:
a layer of aluminum; and
a layer of polypropylene,
22. The method of claim 16, wherein the battery cell is one of:
a lithium-polymer battery cell; and
a silver-zinc battery cell.
US12/622,788 2009-11-20 2009-11-20 Pressure-relief mechanism to improve safety in lithium-polymer battery cells Abandoned US20110123844A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/622,788 US20110123844A1 (en) 2009-11-20 2009-11-20 Pressure-relief mechanism to improve safety in lithium-polymer battery cells

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12/622,788 US20110123844A1 (en) 2009-11-20 2009-11-20 Pressure-relief mechanism to improve safety in lithium-polymer battery cells
US13/722,734 US8617734B2 (en) 2009-11-20 2012-12-20 Pressure-relief mechanism to improve safety in lithium-polymer battery cells
US14/107,902 US20140106190A1 (en) 2009-11-20 2013-12-16 Pressure-relief mechanism to improve safety in lithium-polymer battery cells

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/722,734 Division US8617734B2 (en) 2009-11-20 2012-12-20 Pressure-relief mechanism to improve safety in lithium-polymer battery cells

Publications (1)

Publication Number Publication Date
US20110123844A1 true US20110123844A1 (en) 2011-05-26

Family

ID=44062314

Family Applications (3)

Application Number Title Priority Date Filing Date
US12/622,788 Abandoned US20110123844A1 (en) 2009-11-20 2009-11-20 Pressure-relief mechanism to improve safety in lithium-polymer battery cells
US13/722,734 Active US8617734B2 (en) 2009-11-20 2012-12-20 Pressure-relief mechanism to improve safety in lithium-polymer battery cells
US14/107,902 Abandoned US20140106190A1 (en) 2009-11-20 2013-12-16 Pressure-relief mechanism to improve safety in lithium-polymer battery cells

Family Applications After (2)

Application Number Title Priority Date Filing Date
US13/722,734 Active US8617734B2 (en) 2009-11-20 2012-12-20 Pressure-relief mechanism to improve safety in lithium-polymer battery cells
US14/107,902 Abandoned US20140106190A1 (en) 2009-11-20 2013-12-16 Pressure-relief mechanism to improve safety in lithium-polymer battery cells

Country Status (1)

Country Link
US (3) US20110123844A1 (en)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102544626A (en) * 2012-03-09 2012-07-04 天津市捷威动力工业有限公司 Method and device for removing internal gas from laminated lithium ion battery
US20120244420A1 (en) * 2011-03-25 2012-09-27 Nec Corporation Secondary battery
US20130065109A1 (en) * 2010-05-31 2013-03-14 Nissan Motor Co., Ltd. Thin battery
US20140109397A1 (en) * 2012-10-22 2014-04-24 Apple Inc. Heated folding of seals in battery cells
WO2014062693A1 (en) * 2012-10-18 2014-04-24 Apple Inc. Three-dimensional non-rectangular battery cell structures
WO2014084988A1 (en) * 2012-11-27 2014-06-05 Apple Inc. Battery packaging
US20150194654A1 (en) * 2014-01-06 2015-07-09 Apple Inc. Thermally curable composite separators for batteries in portable electronic devices
CN105981196A (en) * 2014-02-14 2016-09-28 株式会社Lg化学 Pouch-type secondary battery including sealing part having recess
US9570775B2 (en) 2013-03-15 2017-02-14 Apple Inc. Thin film transfer battery systems
US9601751B2 (en) 2013-03-15 2017-03-21 Apple Inc. Annealing method for thin film electrodes
US9711770B2 (en) 2012-11-27 2017-07-18 Apple Inc. Laminar battery system
US9887403B2 (en) 2013-03-15 2018-02-06 Apple Inc. Thin film encapsulation battery systems
US9899661B2 (en) 2013-03-13 2018-02-20 Apple Inc. Method to improve LiCoO2 morphology in thin film batteries
US9929393B2 (en) 2015-09-30 2018-03-27 Apple Inc. Wound battery cells with notches accommodating electrode connections
US10033029B2 (en) 2012-11-27 2018-07-24 Apple Inc. Battery with increased energy density and method of manufacturing the same
US10135097B2 (en) 2010-07-16 2018-11-20 Apple Inc. Construction of non-rectangular batteries
US10141600B2 (en) 2013-03-15 2018-11-27 Apple Inc. Thin film pattern layer battery systems
WO2019027162A1 (en) * 2017-07-31 2019-02-07 주식회사 엘지화학 Cell cartridge and battery module comprising same
US10297798B2 (en) * 2015-10-23 2019-05-21 Samsung Sdi Co., Ltd. Rechargeable battery

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130052892A (en) * 2011-11-14 2013-05-23 에스케이이노베이션 주식회사 Battery cell, and secondary battery
US9786883B2 (en) 2014-08-27 2017-10-10 X Development Llc Battery containment mesh
US20170271626A1 (en) * 2016-03-15 2017-09-21 Andrew W. Keates Package-less battery cell apparatus, and method for forming the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007043392A1 (en) * 2005-10-03 2007-04-19 Densei-Lambda Kabushiki Kaisha Battery pack
US20070122714A1 (en) * 2002-03-28 2007-05-31 Tdk Corporation Lithium secondary battery

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4862211B2 (en) * 2000-08-08 2012-01-25 株式会社Gsユアサ sealed secondary battery
JP4604441B2 (en) * 2002-07-18 2011-01-05 日本電気株式会社 Film-clad battery and manufacturing method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070122714A1 (en) * 2002-03-28 2007-05-31 Tdk Corporation Lithium secondary battery
WO2007043392A1 (en) * 2005-10-03 2007-04-19 Densei-Lambda Kabushiki Kaisha Battery pack
US20090053585A1 (en) * 2005-10-03 2009-02-26 Densei-Lambda Kabushiki Kaisha Battery Pack

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130065109A1 (en) * 2010-05-31 2013-03-14 Nissan Motor Co., Ltd. Thin battery
US9178187B2 (en) * 2010-05-31 2015-11-03 Nissan Motor Co., Ltd. Thin battery
US10135097B2 (en) 2010-07-16 2018-11-20 Apple Inc. Construction of non-rectangular batteries
US9076995B2 (en) * 2011-03-25 2015-07-07 Nec Corporation Secondary battery
US20120244420A1 (en) * 2011-03-25 2012-09-27 Nec Corporation Secondary battery
CN102544626A (en) * 2012-03-09 2012-07-04 天津市捷威动力工业有限公司 Method and device for removing internal gas from laminated lithium ion battery
WO2014062693A1 (en) * 2012-10-18 2014-04-24 Apple Inc. Three-dimensional non-rectangular battery cell structures
US20140109397A1 (en) * 2012-10-22 2014-04-24 Apple Inc. Heated folding of seals in battery cells
WO2014084988A1 (en) * 2012-11-27 2014-06-05 Apple Inc. Battery packaging
US10211433B2 (en) 2012-11-27 2019-02-19 Apple Inc. Battery packaging
US10033029B2 (en) 2012-11-27 2018-07-24 Apple Inc. Battery with increased energy density and method of manufacturing the same
US9711770B2 (en) 2012-11-27 2017-07-18 Apple Inc. Laminar battery system
US10439187B2 (en) 2012-11-27 2019-10-08 Apple Inc. Laminar battery system
US9899661B2 (en) 2013-03-13 2018-02-20 Apple Inc. Method to improve LiCoO2 morphology in thin film batteries
US10141600B2 (en) 2013-03-15 2018-11-27 Apple Inc. Thin film pattern layer battery systems
US9887403B2 (en) 2013-03-15 2018-02-06 Apple Inc. Thin film encapsulation battery systems
US9570775B2 (en) 2013-03-15 2017-02-14 Apple Inc. Thin film transfer battery systems
US9601751B2 (en) 2013-03-15 2017-03-21 Apple Inc. Annealing method for thin film electrodes
US20150194654A1 (en) * 2014-01-06 2015-07-09 Apple Inc. Thermally curable composite separators for batteries in portable electronic devices
US10014497B2 (en) 2014-02-14 2018-07-03 Lg Chem, Ltd. Pouch-type secondary battery including sealed part having recess
CN105981196A (en) * 2014-02-14 2016-09-28 株式会社Lg化学 Pouch-type secondary battery including sealing part having recess
EP3091593A4 (en) * 2014-02-14 2017-07-19 LG Chem, Ltd. Pouch-type secondary battery including sealing part having recess
US9929393B2 (en) 2015-09-30 2018-03-27 Apple Inc. Wound battery cells with notches accommodating electrode connections
US10297798B2 (en) * 2015-10-23 2019-05-21 Samsung Sdi Co., Ltd. Rechargeable battery
WO2019027162A1 (en) * 2017-07-31 2019-02-07 주식회사 엘지화학 Cell cartridge and battery module comprising same

Also Published As

Publication number Publication date
US8617734B2 (en) 2013-12-31
US20130115491A1 (en) 2013-05-09
US20140106190A1 (en) 2014-04-17

Similar Documents

Publication Publication Date Title
CN100416907C (en) Bag-type lithium accumulator cell
JP4235538B2 (en) Secondary battery unit
EP3026729B1 (en) Design and construction of non-rectangular batteries
US7442465B2 (en) Jelly-roll type electrode assembly, lithium secondary battery having the same, and method for manufacturing the same
CA2562960C (en) Electrochemical cell comprising electrode lead with protector element
US7935436B2 (en) Rechargeable battery with gas release safety vent
JP2006261128A (en) Nonaqueous electrolytic solution battery
KR101009517B1 (en) Electrode Assembly and Lithium Secondary battery with the Same
CN104303332B (en) Battery cell with step structure
CN101345323B (en) Pouched lithium secondary battery
KR100876270B1 (en) Rechargeable battery
EP2477252A1 (en) Seal tape and secondary battery using same
CN202434647U (en) Battery pack and portable electronic equipment
JP3937422B2 (en) Lithium ion battery and manufacturing method thereof
EP1946396B1 (en) Secondary battery with advanced safety
US20100028772A1 (en) Pouch-type secondary battery having an non-sealing residue portion
TWI459608B (en) Curved battery cells for portable electronic devices
TWI460899B (en) Non-rectangular batteries for portable electronic devices
CN1222055C (en) Battery assembly and producing method thereof
US7976981B2 (en) Pouch-type lithium secondary battery and fabricating method thereof
US7122271B2 (en) Battery unit and lithium secondary battery employing the same
CN103201872B (en) Comprise the rechargeable battery of the jellyroll with multiple thickness
CN101312253B (en) Bag type secondary battery
CN1753237A (en) Lithium polymer battery with reinforcement layer and its manufacturing method
JP5219587B2 (en) Laminated battery and battery module including the laminated battery

Legal Events

Date Code Title Description
AS Assignment

Owner name: APPLE INC., CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BHARDWAJ, RAMESH C.;HWANG, TAISUP;MANK, RICHARD M.;SIGNING DATES FROM 20091116 TO 20091119;REEL/FRAME:023978/0747

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION