WO2008016229A1 - Pouch-type secondary battery having an non-sealing residue portion - Google Patents
Pouch-type secondary battery having an non-sealing residue portion Download PDFInfo
- Publication number
- WO2008016229A1 WO2008016229A1 PCT/KR2007/003531 KR2007003531W WO2008016229A1 WO 2008016229 A1 WO2008016229 A1 WO 2008016229A1 KR 2007003531 W KR2007003531 W KR 2007003531W WO 2008016229 A1 WO2008016229 A1 WO 2008016229A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sealing
- secondary battery
- electrode assembly
- sealing portion
- battery
- Prior art date
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Classifications
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- 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
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- 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 of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
-
- 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 of a single cell or a single battery
- H01M50/14—Primary casings, jackets or wrappings of a single cell or a single battery for protecting against damage caused by external factors
-
- 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
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
-
- 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
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- 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
Definitions
- the present invention relates to a pouch-shaped secondary battery having a non-sealing residue portion, and, more particularly, to a secondary battery including an electrode assembly mounted in a pouch-shaped battery case in a sealed state, wherein a residue portion, which is not sealed (non-sealing residue portion), is defined between a sealing portion of the battery case and the electrode assembly for collecting generated gas, and the non-sealing residue portion is formed at the outside of an electrode assembly receiving part adjacent to the one-side sealing portion.
- secondary batteries may be classified based on the construction of an electrode assembly having a cathode/separator/anode structure.
- the electrode assembly may be constructed in a jelly-roll (winding) type structure in which long-sheet type cathodes and anodes are wound while separators are disposed respectively between the cathodes and the anodes, a stacking type structure in which pluralities of cathodes and anodes having a predetermined size are successively stacked while separators are disposed respectively between the cathodes and the anodes, or a stacking/folding type structure in which pluralities of cathodes and anodes having a predetermined size are successively stacked while separators are disposed respectively between the cathodes and the anodes to constitute a bi-cell or a full-cell, and then the bi-cell or the full-cell is wound.
- a jelly-roll (winding) type structure in which long-sheet type cathodes and anodes are wound while separators are
- FIG. 1 is an exploded perspective view typically illustrating the general structure of a conventional representative pouch-shaped secondary battery.
- the pouch-shaped secondary battery 10 includes an electrode assembly 30, pluralities of electrode tabs 40 and 50 extending from the electrode assembly 30, electrode leads 60 and 70 welded to the electrode tabs 40 and 50, respectively, and a battery case 20 for receiving the electrode assembly 30.
- the electrode assembly 30 is a power generating element comprising cathodes and anodes successively stacked while separators are disposed respectively between the cathodes and the anodes.
- the electrode assembly 30 is constructed in a stacking structure or a stacking/folding structure.
- the electrode tabs 40 and 50 extend from corresponding electrode plates of the electrode assembly 30.
- the electrode leads 60 and 70 are electrically connected to the electrode tabs 40 and 50 extending from the corresponding electrode plates of the electrode assembly 30, respectively, for example, by welding.
- the electrode leads 60 and 70 are partially exposed to the outside of the battery case 20.
- To the upper and lower surfaces of the electrode leads 60 and 70 are partially attached insulative films 80 for improving sealability between the battery case 20 and the electrode leads 60 and 70 and, at the same time, for securing electrical insulation between the battery case 20 and the electrode leads 60 and 70.
- the battery case 20 is made of an aluminum laminate sheet.
- the battery case 20 has a space defined therein for receiving the electrode assembly 30.
- the battery case 20 is formed generally in the shape of a pouch.
- the electrode assembly 30 is a stacking type electrode assembly as shown in FIG. 1, the inner upper end of the battery case 20 is spaced apart from the electrode assembly 30 such that the plurality of cathode tabs 40 and the plurality of anode tabs 50 can be coupled to the electrode leads 60 and 70, respectively.
- Japanese Patent Application Publication No. 2005-332726 discloses a structure in which a space having a predetermined width is formed inside the receiving part of the laminate sheet, in which the electrode assembly is mounted, along the outer circumference of the receiving part.
- the size of the receiving part is large as compared to the size of the electrode assembly. Consequently, it is difficult to correctly position of the electrode assembly in the receiving part, such that the space is formed inside the receiving part, in a practical manufacturing process.
- 2005-222872 discloses a structure in which a gas channel, for allowing a gas discharge region to be reliably widened, is mounted in a laminate battery case, and a gas channel guide member is made of a material having a higher strength than that of the laminate sheet. Consequently, the manufacturing process is complicated, and manufacturing costs are high, with the result that the disclosed structure is limited to be applied to a practical manufacturing process.
- the present invention has been made to solve the above problems, and other technical problems that have yet to be resolved.
- an object of the present invention is to provide a secondary battery including an electrode assembly received in a receiving part of a laminate sheet, wherein a non-sealing portion, through which an electrolyte is injected into a battery case, is not sealed at a region adjacent to the electrode assembly, but a non-sealing residue portion is formed between the sealing portion of the battery case and the electrode assembly for collecting gas generated due to the decomposition of the electrolyte under an abnormal operating condition of the battery, whereby the generation of high pressure in the battery case and the deformation of the battery are effectively prevented under the abnormal operating condition.
- Another object of the present invention is to provide a secondary battery that can be easily manufactured while the safety of the battery is secured.
- a secondary battery including an electrode assembly of a cathode/separator/anode structure mounted in a pouch-shaped battery case in a sealed state, wherein a residue portion, which is not sealed (non- sealing residue portion), is defined between a sealing portion of the battery case and the electrode assembly for collecting generated gas, and the non-sealing residue portion is formed by (a) mounting the electrode assembly between upper and lower laminate sheets, at least one of which has a receiving part of a size approximately corresponding to the electrode assembly, (b) sealing three sides of the upper and lower laminate sheets, including two sides where electrode terminals are disposed, among four sides of the upper and lower laminate sheets, (c) injecting an electrolyte in the battery case through the non-sealing portion, and (d) sealing the non-sealing portion at a region
- the pouch-shaped battery according to the present invention includes the non-sealing residue portion, defined between the sealing portion of the battery case and the electrode assembly for collecting gas. Consequently, when high pressure is generated in the battery due to an abnormal operating condition, such as the overcharge of the battery or the exposure of the battery to high temperature, the non-sealing residue portion expands primarily to collect generated gas within the allowable volume of the non-sealing residue portion, thereby restraining the increase in internal pressure of the battery.
- the non-sealing residue portion, for collecting the generated gas is not located in the electrode assembly receiving part. Consequently, it is not necessary to manufacture the receiving part such that the receiving part has a size greater than necessary, and therefore, it is easy to receive the electrode assembly in the receiving part.
- the electrode assembly is not particularly restricted so long as the electrode assembly is constructed in a structure in which a plurality of electrode tabs are connected to form cathodes and anodes.
- the electrode assembly is constructed in a winding, stacking, or stacking/folding type structure.
- the details of the stacking/folding type electrode assembly are disclosed in Korean Patent Application Publication No. 2001-0082058, No. 2001-0082059, and No. 2001- 0082060, which have been filed in the name of the applicant of the present patent application.
- the disclosures of the above-mentioned patent publications are hereby incorporated by reference as if fully set forth therein.
- the secondary battery according to the present invention is applied to a pouch-shaped secondary battery including an electrode assembly mounted in a receiving part of a pouch-shaped case made of a laminate sheet, for example an aluminum laminate sheet, including a resin layer and a metal layer.
- a laminate sheet for example an aluminum laminate sheet, including a resin layer and a metal layer.
- the pouch-shaped secondary battery is constructed in a structure in which the electrode assembly is mounted in the receiving part of the pouch-shaped battery case made of, for example, the aluminum laminate sheet.
- the pouch-shaped secondary battery is manufactured by forming the receiving part, for receiving the electrode assembly, at the laminate sheet, and thermally welding an additional sheet separated from the laminate sheet or a sheet extending from the laminate sheet, while the electrode assembly is placed in the receiving part, to seal the receiving part.
- the laminate sheet may be constructed in a structure in which the electrode assembly receiving part is formed at at least one of the upper and lower laminate sheets at step (a).
- the upper and lower laminate sheets may be separated from each other or connected to each other at one-side ends thereof.
- a laminate sheet having a thickness of dozens or hundreds of centimeters is partially pressed, in a drawing process using a die and a punch, to form the receiving part.
- the laminate sheet is constructed in a structure in which the upper and lower laminate sheets are joined to each other at one-side ends thereof.
- the two-unit separation type battery case is constructed in a structure in which the two battery case units are joined to each other at four sides thereof, thereby forming the sealing portion.
- the four-side sealing portion is exposed to the atmosphere, and therefore, a possibility of air (especially, moisture) penetrating the battery case is greatly increased after the battery case is used for a long period of time. Consequently, the life span of the battery is reduced.
- the above-mentioned problem does not occur.
- the receiving part of the laminate sheet of the secondary battery according to the present invention is constructed in a shape approximately corresponding to the electrode assembly, as defined in step (a).
- the inside surface of the receiving part is formed in the shape of a downward inclined surface (tapered surface) in order to prevent the breakage of the sheet when the receiving part is formed by the drawing process.
- the bottom surface of the receiving part has a size approximately corresponding to the electrode assembly.
- the side of the electrode assembly stably reaches the bottom surface of the receiving part along the downward inclined surface of the receiving part in spite of the positional error of the electrode assembly in the receiving part, and therefore, the installation of the electrode assembly is very easily accomplished.
- the three sides of the upper and lower laminate sheets, including the two sides where electrode terminals are disposed, among the four sides of the upper and lower laminate sheets are sealed.
- the battery case constructed in the structure in which the one-side ends thereof are connected to each other, as previously described only two sides of the battery case may be sealed.
- the electrode terminals may relatively lower the sealability of the sealing portion due to the material and the thickness thereof. For this reason, it is necessary to seal the electrode terminals during the above-described sealing process.
- the electrolyte is injected into the battery case through the non-sealing portion left by the partial sealing process at step (c), and the activation process is carried out at step (d).
- the non-sealing portion is resealed at step (e) after the electrolyte injection process and the activation process. For this reason, the non-sealing portion is formed such that the non-sealing portion is larger than the remaining sealing portion.
- the width A of the side including the non-sealing portion is not particularly restricted so long as the width A of the side including the non-sealing portion is greater than the width L of the remaining sides including the sealing portion.
- a lithium secondary battery uses metal oxide, such as LiCoO 2 , as a cathode active material, and carbon as an anode active material.
- Metal oxide such as LiCoO 2
- Polyolefin-based porous separators are disposed between anodes and cathodes, and a non-aqueous electrolyte including lithium salt, such as LiPF 6 , is injected into the lithium secondary battery.
- LiPF 6 lithium salt
- the lithium secondary battery is manufactured.
- lithium ions are discharged from the cathode active material and inserted into a carbon layer of the anode.
- lithium ions are discharged from the carbon layer of the anode and inserted into the cathode active material.
- the non-aqueous electrolyte serves as a medium to move the lithium ions between the respective anodes and cathodes. It is necessary for the lithium secondary battery to be basically stable within the operating voltage range of the battery and have a performance to transfer ions at a sufficiently high speed.
- the electrolyte is decomposed at the surface of the anode active material, during the continuous charge and discharge of the battery, with the result that gas is generated.
- a solid electrolyte interface (SEI) film is formed at the surface of the anode active material for restraining the further generation of gas.
- the activation process carried out at step (d) is necessary to form the SEI film, which is required before the completion of the battery.
- a step of sealing only the outer circumferential end region (end sealing portion) of the non-sealing portion, through which the electrolyte is injected into the battery case, to form a gas pocket of a predetermined size in the battery case, and cutting the end sealing portion to remove gas generated during an activation process and discharge an excess of the electrolyte or replenish an shortage of the electrolyte is further carried out.
- the width B of the gas pocket part is not particularly restricted so long as the width B of the gas pocket part is a predetermined portion of the width A of the corresponding side.
- the electrolyte when the electrolyte has been consumed during the activation process or when the electrolyte has been insufficiently injected into the battery case during the manufacturing process of the battery, the electrolyte may be replenished through a second injection process.
- the battery is left as it is for a predetermined period of time (for example, 12 hours), and then an activation process and a charge process may be carried out again.
- the non-sealing portion is sealed at the region where the non- sealing portion is spaced a predetermined width from the receiving part.
- C (0.3 ⁇ 0.6) A.
- the specific side having the width A including the non-sealing residue portion having the width C, has a lower joint force than the remaining sealing portion having the width L. Consequently, when high pressure is generated in the battery, the non- sealing residue portion having the width C, which is located at the above-specified side among the four sides of the battery case, expands primarily to restrain the increase in internal pressure of the battery, and, when high pressure greater than a critical value is generated in the battery, the sealing portion of the side having the width A adjacent to the non-sealing residue portion is widened secondarily to discharge high-pressure gas. Consequently, the explosion of the battery is prevented, and therefore, the safety of the battery is secured.
- the secondary battery according to the present invention is a lithium secondary battery.
- the present invention is particularly applied to a so-called a lithium ion polymer battery having an electrode assembly impregnated with a lithium-containing electrolyte in the form of a gel.
- a middle- or large-sized battery pack including the pouch-shaped battery as a unit cell.
- the middle- or large-sized battery pack includes a plurality of unit cells. For this reason, a chain reaction may be induced when some of the unit cells are abnormally operated. Consequently, it is possible to further improve the overall safety of the battery pack by including the above-described non-sealing residue portion.
- FIG. 1 is an exploded perspective view illustrating the general structure of a conventional pouch-shaped secondary battery
- FIG. 2 is typical view illustrating a step of injecting an electrolyte during the manufacture of a pouch-shaped secondary battery according to the present invention
- FIG. 3 is a vertical sectional view taken along line A-A of FIG. 2;
- FIG. 4 is an enlarged view, in section, illustrating a drawn portion B of FIG.
- FIG. 5 is typical view illustrating a step of performing an activation process, while a gas pocket part is defined in a non-sealing portion, after the electrolyte injection step is completed, according to a preferred embodiment of the present invention
- FIGS. 6 and 7 are typical views illustrating a step of removing an end sealing portion to discharge collected gas and a step of forming a non-sealing residue portion, respectively;
- FIG. 8 is a typical view illustrating the occurrence of a swelling phenomenon under an abnormal operating condition of a secondary battery according to the present invention.
- FIG. 2 is typical view illustrating a step of injecting an electrolyte during the manufacture of a pouch-shaped secondary battery according to the present invention.
- the pouch-shaped secondary battery 100 is constructed in a structure in which an electrode assembly 110, to which electrode terminals 112 and 114 are connected, is mounted in a battery case 130 including two laminate sheets, one of which has a receiving part 120.
- the battery case 130 is provided at three sides thereof, including the top side and the bottom side of the battery case 130, at which the electrode terminals 112 and 114 are disposed, respectively, with a sealing portion 140, which is formed by a thermal press.
- the battery case 130 is provided at the remaining side thereof with a non-sealing portion 150. An electrolyte is injected into the battery case 130 through the non-sealing portion 150.
- FIG. 3 is a vertical sectional view taken along line A-A of FIG. 2, and FIG. 4 is an enlarged view, in section, typically illustrating a drawn portion B of FIG. 3.
- the electrode assembly is received in the receiving part 120 of the lower case 134, and is covered by the upper case 132.
- the contact area Ll between the upper case 132 and the lower case 134 is sealed.
- An aluminum laminate sheet having a thickness of approximately 113 ⁇ m is partially pressed by a drawing process using a die and a punch, whereby the receiving part 120 is formed at the lower case 134.
- the sheet having such a small thickness may be torn when the sheet is pressed. Consequently, it is necessary to form bent regions 134a and 134b gently in the drawing process.
- the side surface of the receiving part is formed in the shape of a downward inclined surface 122, and the top surface of the receiving part 120 is slightly greater than the bottom surface of the receiving part 120.
- the electrode assembly 110 has a size approximately corresponding to the bottom surface of the receiving part 120. Consequently, the electrode assembly 110 is easily received in the receiving part 12 although a positional error somewhat occurs when the electrode assembly 110 is received in the receiving part 120.
- FIG. 5 is typical view illustrating a step of performing an activation process, while a gas pocket part is defined in a non-sealing portion, after the electrolyte injection step is completed, according to a preferred embodiment of the present invention.
- the non-sealing portion 150 (see FIG. 2) of the battery case is sealed, with a predetermined width, only at the outer circumferential end of the battery case, to define a relatively large gas pocket part 160.
- the end sealing portion 162 is formed to define the gas pocket part 160, which serves to temporarily collect gas generated during the activation process. Consequently, the width of the end sealing portion 162 is less than that of the remaining sealing portion 140.
- a protective film is formed at the anodes of the electrode assembly 110, during the initial charge and discharge of the secondary battery through the activation process. At this time, some of a carbonate compound is decomposed, and gas, generated by the decomposition, is collected in the gas pocket part 160. Through the activation process, the previously protective film may reduce an additional amount of gas generated under a normal operating condition when a finally completed battery cell is charged.
- FIGS. 6 and 7 are typical views illustrating a step of removing an end sealing portion to discharge collected gas and a step of forming a non-sealing residue portion, respectively.
- the gas pocket 160 is partially removed to remove the end sealing portion 162 shown in FIG. 5, with the result that gas collected in the gas pocket part 160 is removed. At this time, an excess of the electrolyte may be squeezed out and/or a shortage of the electrolyte may be replenished.
- the cut size of the gas pocket part 160 is appropriately adjusted such that a sealing portion having a predetermined size is formed while a non-sealing residue portion is formed.
- a predetermined outer circumferential portion is sealed to form a side sealing portion 172 such that a non-sealing residue portion 170 is formed.
- the side sealing portion 172 preferably has a smaller width than that of the remaining sealing portion 140, although the width of the side sealing portion 172 may be equal to that of the remaining sealing portion 140.
- FIG. 8 is a typical view illustrating the occurrence of a swelling phenomenon under an abnormal operating condition of a secondary battery according to the present invention.
- a residue volume Va having a predetermined size which is formed during a drawing process, exists inside of the electrode assembly receiving part 120 under a normal operating condition.
- gas is generated, under an abnormal operating condition, for example, when the secondary battery is overcharged or exposed to high temperature, with the result that internal pressure is increased to deform the non-sealing residue portion 170.
- the deformation of the non-sealing residue portion 170 may reach the region where the side sealing portion 172 is formed. Consequently, the residue volume may be changed into a volume deformation Vb or a volume deformation Vc depending upon the amount of gas generated.
- the volume deformation Vb and the volume deformation Vc with respect to the residue volume Va are increased in proportion to approximately the length, obtained by subtracting the length L2 of the side corresponding to the side sealing portion 172 from the whole length Ll of the side including the non-sealing residue portion 170, to the third power. Consequently, the amount of gas collectable in the non-sealing residue portion 170 is relatively large.
- the sealing portion having the smallest size among the four sides of the battery case i.e., the side sealing portion 172 adjacent to the non-sealing residue portion 170 is widened, with the result that high-pressure gas is discharged from the battery case. Consequently, the explosion of the battery is prevented.
- the secondary battery according to the present invention is constructed in a structure in which the movement of the electrode assembly is restrained, when the battery drops or external impacts are applied to the battery, whereby the occurrence of an internal short circuit is prevented. Furthermore, the non-sealing residue portion primarily expands, when high pressure is generated in the battery due to overcharge of the battery or exposure of the battery to high temperature, whereby the increase in internal pressure of the secondary battery is restrained, and therefore, the safety of the secondary battery is further improved.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800358151A CN101517776B (en) | 2006-07-31 | 2007-07-21 | Pouch-type secondary battery having an non-sealing residue portion |
US12/309,912 US8277970B2 (en) | 2006-07-31 | 2007-07-21 | Pouch-type secondary battery having an non-sealing residue portion |
JP2009522704A JP4990975B2 (en) | 2006-07-31 | 2007-07-21 | Pouch-type secondary battery with unsealed residue |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2006-0071834 | 2006-07-31 | ||
KR1020060071834A KR100876455B1 (en) | 2006-07-31 | 2006-07-31 | Pouch type secondary battery with unsealed surplus |
Publications (1)
Publication Number | Publication Date |
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WO2008016229A1 true WO2008016229A1 (en) | 2008-02-07 |
Family
ID=38997384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2007/003531 WO2008016229A1 (en) | 2006-07-31 | 2007-07-21 | Pouch-type secondary battery having an non-sealing residue portion |
Country Status (5)
Country | Link |
---|---|
US (1) | US8277970B2 (en) |
JP (1) | JP4990975B2 (en) |
KR (1) | KR100876455B1 (en) |
CN (1) | CN101517776B (en) |
WO (1) | WO2008016229A1 (en) |
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Also Published As
Publication number | Publication date |
---|---|
KR100876455B1 (en) | 2008-12-29 |
CN101517776B (en) | 2011-11-09 |
JP4990975B2 (en) | 2012-08-01 |
KR20080011477A (en) | 2008-02-05 |
US8277970B2 (en) | 2012-10-02 |
JP2009545849A (en) | 2009-12-24 |
CN101517776A (en) | 2009-08-26 |
US20100028772A1 (en) | 2010-02-04 |
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