WO2013027935A1 - Battery module - Google Patents

Battery module Download PDF

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Publication number
WO2013027935A1
WO2013027935A1 PCT/KR2012/006048 KR2012006048W WO2013027935A1 WO 2013027935 A1 WO2013027935 A1 WO 2013027935A1 KR 2012006048 W KR2012006048 W KR 2012006048W WO 2013027935 A1 WO2013027935 A1 WO 2013027935A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrolyte
electrode assembly
retaining structure
battery module
electrode
Prior art date
Application number
PCT/KR2012/006048
Other languages
French (fr)
Inventor
Jong Hwan Kim
Young Suk Kim
Chang Mook HWANG
Original Assignee
Sk Innovation Co.,Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sk Innovation Co.,Ltd. filed Critical Sk Innovation Co.,Ltd.
Priority to US14/126,039 priority Critical patent/US20140154554A1/en
Priority to CN201280040609.0A priority patent/CN103748707A/en
Priority to EP20120826220 priority patent/EP2748881A4/en
Publication of WO2013027935A1 publication Critical patent/WO2013027935A1/en

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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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • 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
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/049—Processes for forming or storing electrodes in the battery container
    • 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
    • H01M10/058—Construction or manufacture
    • 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
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/673—Containers for storing liquids; Delivery conduits therefor
    • H01M50/682—Containers for storing liquids; Delivery conduits therefor accommodated in battery or cell casings
    • 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
    • H01M50/70—Arrangements for stirring or circulating the electrolyte
    • 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 battery module, and more particularly, to a battery module capable of having improved performance by inserting an electrolyte retaining structure into a cell of the battery module.
  • a battery may be largely divided into a primary battery and a secondary battery.
  • the primary battery may not be reused after it is used once since it generates electricity using an irreversible reaction.
  • An example of the primary battery includes a dry battery, a mercury battery, a volta battery, and the like.
  • the secondary battery may be reused through charging after it is used since it generates electricity using a reversible reaction unlike the primary battery.
  • An example of the secondary battery includes a lead storage battery, a lithium ion battery, a nickel-cadmium battery, and the like.
  • a battery module is configured to include an electrode assembly including a plurality of anode plates, a plurality of cathode plates, and a plurality of separators; and a pouch receiving the electrode assembly therein.
  • an electrolyte is injected into the pouch to generate an electrical reaction.
  • a limitation value in the amount of electrolyte is determined by a degassing process, and the electrolyte is discharged in the degassing process when the amount of electrolyte increases, such that a contamination problem occurs.
  • the degassing process indicates a process of removing gas dissolved in the electrolyte.
  • an excessive amount of electrolyte decreases close adhesion between Ca and An to deteriorate output characteristics and robustness of the battery, such that the battery is deformed.
  • An object of the present invention is to provide a battery module capable of storing an extra electrolyte therein, preventing an electrolyte from being discharged to the outside in a degassing process, and improving lifespan and storage characteristics of a battery by supplying an electrolyte corresponding to an amount of electrolyte decomposed and consumed in the case in which the electrolyte is consumed during repetitive charging and discharging of the battery module.
  • a battery module includes: an electrode assembly including a plurality of cathode plates, a plurality of anode plates, and a plurality of separators each interposed between the plurality of cathode plates and the plurality of anode plates; a pouch receiving the electrode assembly therein; and an electrode retaining structure received together with the electrode assembly in the pouch and having a space capable of retaining an electrolyte.
  • the electrode retaining structure may have the same thickness as that of the electrode assembly.
  • the electrode retaining structure may be positioned at a lower portion of the electrode assembly.
  • the electrode retaining structure may be positioned at a side of the electrode assembly.
  • the electrode retaining structure may be positioned at an upper portion of the electrode assembly and be positioned at a position at which it does not interfere with an anode tap and a cathode tap of the electrode assembly.
  • the electrode retaining structure may be manufactured in a lattice shape.
  • the electrode retaining structure may be manufactured in a pipe shape in which it has a plurality of holes perforated therein.
  • the electrolyte retaining structure capable of retaining the electrolyte is inserted into the pouch, thereby making it possible to store an extra electrolyte in the battery module, prevent the electrolyte from being discharged to the outside in a degassing process, and improve lifespan and storage characteristics of a battery by supplying the electrolyte corresponding to an amount of electrolyte decomposed and consumed in the case in which the electrolyte is consumed during repetitive charging and discharging of the battery module.
  • FIG. 1 is an exploded view of a battery module according to an exemplary embodiment of the present invention.
  • FIG. 2 is a view showing a battery module according to a first exemplary embodiment of the present invention.
  • FIG. 3 is a view showing a battery module according to a second exemplary embodiment of the present invention.
  • FIG. 4 is a view showing a battery module according to a third exemplary embodiment of the present invention.
  • FIGS. 5A and 5B are, respectively, views showing an electrolyte retaining structure according to first and second exemplary embodiments of the present invention.
  • cathode tab 112 anode tab
  • lattice type structure 132 pipe type structure
  • a structure and a shape of a battery module 100 according to an exemplary embodiment of the present invention will be described with reference to FIG. 1.
  • the battery module 100 is configured to include an electrode assembly 110, a pouch 120, and an electrolyte retaining structure 130.
  • the electrode assembly 110 includes battery cells each including a cathode plate, an anode plate, and a separator interposed between the cathode plate and the anode plate; and electrode tabs 111 and 112 bonded to each other so that the battery cells are electrically connected to each other.
  • the electrode assembly 110 is configured to include the anode plate generally made of carbon, the cathode plate generally made of a lithium compound, and the separator preventing a contact between the cathode plate and the anode plate.
  • an inner portion of the electrode assembly 110 is filled with an electrolyte.
  • Lithium ions in the electrolyte moves toward the anode plate at the time of charging and moves toward the cathode plate at the time of discharging, and each of the anode and cathode plates discharges or absorbs surplus electrons to generate a chemical reaction.
  • the electrons flow to the electrode tabs 111 and 112 connected to external terminals in this process.
  • the electrode tabs 111 and 112 include an anode tab 112 and a cathode tab 111 and are bonded to portions extended from the cathode plate and the anode plate, respectively.
  • the anode tab 112 is bonded to a portion extended from a plurality of anode plates and partially protrudes outwardly in the case in which the electrode assembly 110 is received in the pouch 120.
  • the cathode tab 111 is bonded to a portion extended from a plurality of cathode plates and partially protrudes outwardly in the case in which the electrode assembly 110 is received in the pouch 120.
  • the electrode assembly 110 is not limited to having a structure in which the anode tab 112 and the cathode tab 111 are formed at an upper portion as shown in FIG. 1, but may also have a structure in which the anode tab 112 is formed at one side and the cathode tab 111 is formed at the other side.
  • the pouch 120 receives the electrode assembly 110 therein and seals the electrode assembly 110 in a state in which the anode tab112 and the cathode tab 111 are exposed.
  • the electrolyte retaining structure 130 is received together with the electrode assembly 110 in the pouch 120.
  • the pouch 120 receives the electrode assembly 110 in which both of the cathode tab 111 and the anode tab 112 are formed at one side, only one side of the pouch 120 is opened, such that the electrode assembly 110 is inserted into the pouch 120 through the opened side and then sealed.
  • both sides of the pouch 120 are opened, such that the electrode assembly 110 is inserted into the pouch 120 through the opened sides and then sealed.
  • the pouch 120 has a structure in which a surface of a metal thin film is laminated with an insulating polymer.
  • the metal thin film has a structure for maintaining physical strength, prevents penetration of moisture, or the like, from the outside, and effectively radiates heat generated in the inside to the outside.
  • the metal thin film may be made of any one selected from a group consisting of an alloy of iron, carbon, chrome, and manganese, an alloy of iron, chrome, and nickel, aluminum, and an equivalent thereof.
  • the metal thin film is made of a material containing iron
  • strength of the metal thin film increases
  • the metal thin film is made of a material containing aluminum
  • flexibility of the metal thin film increases.
  • the electrolyte retaining structure 130 has a space formed therein and capable of retaining the electrolyte and is partially opened so that the electrolyte may be injected thereinto.
  • the electrolyte retaining structure 130 is manufactured to have the same thickness as that of the electrode assembly 110, such that the electrolyte retaining structure 130 is formed to be flat without a portion protruding outwardly in the case in which it is received in the pouch 120 and then sealed.
  • Battery modules 100 according to several exemplary embodiments of the present invention will be described with reference to FIGS. 2 to 4.
  • the electrode retaining structure 130 may be installed at any one or more of an upper portion, a side, and a lower portion of the electrode assembly 110.
  • the electrolyte retaining structure 130 may be positioned at the lower portion of the electrode assembly 110.
  • the electrolyte retaining structure 130 is positioned at the lower portion of the electrode assembly 110, the electrolyte is filled in the space formed in the electrolyte retaining structure 130, such that in the case in which charging and discharging are generated in the electrode assembly 110 to consume the electrolyte, thereby causing insufficiency of the electrolyte, the electrolyte filled in the electrolyte retaining structure 130 is supplied to the electrode assembly 110.
  • the electrolyte retaining structure 130 has an opened path in a surface thereof contacting the electrode assembly 110 so that the electrolyte may move, in order to smoothly supply the electrolyte to the electrode assembly 110.
  • the electrolyte retaining structure 130 may be positioned at the side of the electrode assembly 110.
  • the electrolyte retaining structure 130 is positioned at the side of the electrode assembly 110, the electrolyte is filled in the space formed in the electrolyte retaining structure 130, such that in the case in which charging and discharging are generated in the electrode assembly 110 to consume the electrolyte, thereby causing insufficiency of the electrolyte, the electrolyte filled in the electrolyte retaining structure 130 is supplied to the electrode assembly 110.
  • the electrolyte retaining structure 130 has an opened path in a surface thereof contacting the electrode assembly 110 so that the electrolyte may move, in order to smoothly supply the electrolyte to the electrode assembly 110.
  • the electrolyte retaining structure 130 may be positioned at the upper portion of the electrode assembly 110.
  • the electrolyte retaining structure 130 is positioned at the upper portion of the electrode assembly 110, the electrolyte is filled in the space formed in the electrolyte retaining structure 130, such that in the case in which charging and discharging are generated in the electrode assembly 110 to consume the electrolyte, thereby causing insufficiency of the electrolyte, the electrolyte filled in the electrolyte retaining structure 130 is supplied to the electrode assembly 110.
  • the electrolyte retaining structure is positioned at a position at which it does not interfere with the cathode tab 111 and the anode tab 112.
  • the electrolyte retaining structure 130 is positioned at one or more of an outer portion of the cathode tab 111, an outer portion of the anode tab 112, and a portion between the cathode tab 111 and the anode tab 112.
  • the electrolyte retaining structure 130 has an opened path in a surface thereof contacting the electrode assembly 110 so that the electrolyte may move, in order to smoothly supply the electrolyte to the electrode assembly 110.
  • the electrolyte in the electrolyte retaining structure 130 may be supplied to the electrode assembly 110 by gravity.
  • a shape of the electrolyte retaining structure 130 according to the exemplary embodiment of the present invention will be described with reference to FIGS. 5A and 5B.
  • the electrode retaining structure 130 may be manufactured as a lattice type structure 131 having a lattice shape. That is, the lattice type structure 131 is manufactured in a rectangular pillar shape and has an inner portion formed in a lattice shape, such that a space capable of retaining the electrolyte may be formed therein (See FIG. 5A).
  • a surface of the lattice type structure 131 through which the electrolyte moves is positioned at a portion at which it contacts the electrode assembly 110, such that the electrolyte may be smoothly supplied to the electrode assembly 110.
  • the electrode retaining structure 130 may be manufactured as a pipe type structure 132 having a pipe shape.
  • the pipe type structure 132 may be manufactured to have a plurality of holes perforated in an outer peripheral surface thereof, such that inner and outer portions thereof may be in communication with each other. That is, the pipe type structure 132 is manufactured in the pipe shape, such that the electrolyte may be retained therein, and has the plurality of holes perforated in then outer peripheral surface thereof to receive the electrolyte therein, thereby making it possible to supply the electrolyte to the electrode assembly 110 (See FIG. 5B).
  • the electrolyte retaining structure 130 is disposed so that the electrolyte may be smoothly supplied to the electrode assembly 110 since the electrolyte retaining structure 130 has a number of holes formed in a surface through which the electrolyte moves.
  • the electrolyte retaining structure 130 capable of retaining the electrolyte is inserted into the pouch, thereby making it possible to store an extra electrolyte in the battery module 100, prevent the electrolyte from being discharged to the outside in a degassing process, and improve lifespan and storage characteristics of a battery by supplying the electrolyte corresponding to an amount of electrolyte decomposed and consumed in the case in which the electrolyte is consumed during repetitive charging and discharging of the battery module 100.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Filling, Topping-Up Batteries (AREA)

Abstract

Provided is a battery module including: an electrode assembly including a plurality of cathode plates, a plurality of anode plates, and a plurality of separators each interposed between the plurality of cathode plates and the plurality of anode plates; a pouch receiving the electrode assembly therein; and an electrode retaining structure received together with the electrode assembly in the pouch and having a space capable of retaining an electrolyte.

Description

BATTERY MODULE
The present invention relates to a battery module, and more particularly, to a battery module capable of having improved performance by inserting an electrolyte retaining structure into a cell of the battery module.
A battery may be largely divided into a primary battery and a secondary battery. The primary battery may not be reused after it is used once since it generates electricity using an irreversible reaction. An example of the primary battery includes a dry battery, a mercury battery, a volta battery, and the like. The secondary battery may be reused through charging after it is used since it generates electricity using a reversible reaction unlike the primary battery. An example of the secondary battery includes a lead storage battery, a lithium ion battery, a nickel-cadmium battery, and the like.
Generally, a battery module is configured to include an electrode assembly including a plurality of anode plates, a plurality of cathode plates, and a plurality of separators; and a pouch receiving the electrode assembly therein.
In addition, an electrolyte is injected into the pouch to generate an electrical reaction.
In this case, it is advantageous in view of a lifespan and long term storage of the battery to increase an amount of electrolyte injected into the pouch. However, a limitation value in the amount of electrolyte is determined by a degassing process, and the electrolyte is discharged in the degassing process when the amount of electrolyte increases, such that a contamination problem occurs.
The degassing process indicates a process of removing gas dissolved in the electrolyte.
In addition, when an excessive amount of electrolyte is injected, an injection part is contaminated during a process of manufacturing a battery, such that a problem occurs in reliability of sealing of the pouch.
Further, in the case of decreasing a degree of vacuum in the degassing process in order to solve the problem that the electrolyte is discharged, an excessive amount of electrolyte decreases close adhesion between Ca and An to deteriorate output characteristics and robustness of the battery, such that the battery is deformed.
In order to solve these problems, a technology of forming a shape in which a plurality of tubes are connected to a sidewall of a battery to allow an electrolyte to satisfactorily flow to an outer side of an electrode assembly has been known. However, the shape is complicated and is applicable only to a hard case, such that it is difficult to apply the shape to a pouch type case.
An object of the present invention is to provide a battery module capable of storing an extra electrolyte therein, preventing an electrolyte from being discharged to the outside in a degassing process, and improving lifespan and storage characteristics of a battery by supplying an electrolyte corresponding to an amount of electrolyte decomposed and consumed in the case in which the electrolyte is consumed during repetitive charging and discharging of the battery module.
In one general aspect, a battery module includes: an electrode assembly including a plurality of cathode plates, a plurality of anode plates, and a plurality of separators each interposed between the plurality of cathode plates and the plurality of anode plates; a pouch receiving the electrode assembly therein; and an electrode retaining structure received together with the electrode assembly in the pouch and having a space capable of retaining an electrolyte.
The electrode retaining structure may have the same thickness as that of the electrode assembly.
The electrode retaining structure may be positioned at a lower portion of the electrode assembly.
The electrode retaining structure may be positioned at a side of the electrode assembly.
The electrode retaining structure may be positioned at an upper portion of the electrode assembly and be positioned at a position at which it does not interfere with an anode tap and a cathode tap of the electrode assembly.
The electrode retaining structure may be manufactured in a lattice shape.
The electrode retaining structure may be manufactured in a pipe shape in which it has a plurality of holes perforated therein.
With the battery modules according to an exemplary embodiment of the present invention, the electrolyte retaining structure capable of retaining the electrolyte is inserted into the pouch, thereby making it possible to store an extra electrolyte in the battery module, prevent the electrolyte from being discharged to the outside in a degassing process, and improve lifespan and storage characteristics of a battery by supplying the electrolyte corresponding to an amount of electrolyte decomposed and consumed in the case in which the electrolyte is consumed during repetitive charging and discharging of the battery module.
The above and other objects, features and advantages of the present invention will become apparent from the following description of preferred embodiments given in conjunction with the accompanying drawings, in which:
FIG. 1 is an exploded view of a battery module according to an exemplary embodiment of the present invention.
FIG. 2 is a view showing a battery module according to a first exemplary embodiment of the present invention.
FIG. 3 is a view showing a battery module according to a second exemplary embodiment of the present invention.
FIG. 4 is a view showing a battery module according to a third exemplary embodiment of the present invention.
FIGS. 5A and 5B are, respectively, views showing an electrolyte retaining structure according to first and second exemplary embodiments of the present invention.
[Detailed Description of Main Elements]
100: battery module 110: electrode assembly
111: cathode tab 112: anode tab
120: pouch 130: electrolyte retaining structure
131: lattice type structure 132: pipe type structure
Hereinafter, a technical spirit of the present invention will be described in more detail with reference to the accompanying drawings.
However, the accompanying drawings are only examples shown in order to describe the technical idea of the present invention in more detail. Therefore, the technical idea of the present invention is not limited to shapes of the accompanying drawings.
A structure and a shape of a battery module 100 according to an exemplary embodiment of the present invention will be described with reference to FIG. 1.
The battery module 100 is configured to include an electrode assembly 110, a pouch 120, and an electrolyte retaining structure 130.
The electrode assembly 110 includes battery cells each including a cathode plate, an anode plate, and a separator interposed between the cathode plate and the anode plate; and electrode tabs 111 and 112 bonded to each other so that the battery cells are electrically connected to each other.
More specifically, the electrode assembly 110 is configured to include the anode plate generally made of carbon, the cathode plate generally made of a lithium compound, and the separator preventing a contact between the cathode plate and the anode plate. In addition, an inner portion of the electrode assembly 110 is filled with an electrolyte.
Lithium ions in the electrolyte moves toward the anode plate at the time of charging and moves toward the cathode plate at the time of discharging, and each of the anode and cathode plates discharges or absorbs surplus electrons to generate a chemical reaction. The electrons flow to the electrode tabs 111 and 112 connected to external terminals in this process.
The electrode tabs 111 and 112 include an anode tab 112 and a cathode tab 111 and are bonded to portions extended from the cathode plate and the anode plate, respectively.
That is, the anode tab 112 is bonded to a portion extended from a plurality of anode plates and partially protrudes outwardly in the case in which the electrode assembly 110 is received in the pouch 120.
That is, the cathode tab 111 is bonded to a portion extended from a plurality of cathode plates and partially protrudes outwardly in the case in which the electrode assembly 110 is received in the pouch 120.
The electrode assembly 110 is not limited to having a structure in which the anode tab 112 and the cathode tab 111 are formed at an upper portion as shown in FIG. 1, but may also have a structure in which the anode tab 112 is formed at one side and the cathode tab 111 is formed at the other side.
The pouch 120 receives the electrode assembly 110 therein and seals the electrode assembly 110 in a state in which the anode tab112 and the cathode tab 111 are exposed.
The electrolyte retaining structure 130 is received together with the electrode assembly 110 in the pouch 120.
In the case in which the pouch 120 receives the electrode assembly 110 in which both of the cathode tab 111 and the anode tab 112 are formed at one side, only one side of the pouch 120 is opened, such that the electrode assembly 110 is inserted into the pouch 120 through the opened side and then sealed.
Further, in the case in which the pouch 120 receives the electrode assembly 110 in which the cathode tab 111 and the anode tab 112 are formed at both sides, respectively, both sides of the pouch 120 are opened, such that the electrode assembly 110 is inserted into the pouch 120 through the opened sides and then sealed.
In addition, the pouch 120 has a structure in which a surface of a metal thin film is laminated with an insulating polymer.
The metal thin film has a structure for maintaining physical strength, prevents penetration of moisture, or the like, from the outside, and effectively radiates heat generated in the inside to the outside.
In addition, the metal thin film may be made of any one selected from a group consisting of an alloy of iron, carbon, chrome, and manganese, an alloy of iron, chrome, and nickel, aluminum, and an equivalent thereof. In the case in which the metal thin film is made of a material containing iron, strength of the metal thin film increases, and in the case in which the metal thin film is made of a material containing aluminum, flexibility of the metal thin film increases. Generally, it is preferable to use a metal thin film made of the aluminum material.
Meanwhile, the electrolyte retaining structure 130 has a space formed therein and capable of retaining the electrolyte and is partially opened so that the electrolyte may be injected thereinto.
In addition, it is preferable that the electrolyte retaining structure 130 is manufactured to have the same thickness as that of the electrode assembly 110, such that the electrolyte retaining structure 130 is formed to be flat without a portion protruding outwardly in the case in which it is received in the pouch 120 and then sealed.
Battery modules 100 according to several exemplary embodiments of the present invention will be described with reference to FIGS. 2 to 4.
In the case in which the electrode retaining structure 130 is received together with the electrode assembly 110 in the pouch 120, the electrode retaining structure 130 may be installed at any one or more of an upper portion, a side, and a lower portion of the electrode assembly 110.
As shown in FIG. 2, the electrolyte retaining structure 130 may be positioned at the lower portion of the electrode assembly 110.
In the case in which the electrolyte retaining structure 130 is positioned at the lower portion of the electrode assembly 110, the electrolyte is filled in the space formed in the electrolyte retaining structure 130, such that in the case in which charging and discharging are generated in the electrode assembly 110 to consume the electrolyte, thereby causing insufficiency of the electrolyte, the electrolyte filled in the electrolyte retaining structure 130 is supplied to the electrode assembly 110.
In this case, it is preferable that the electrolyte retaining structure 130 has an opened path in a surface thereof contacting the electrode assembly 110 so that the electrolyte may move, in order to smoothly supply the electrolyte to the electrode assembly 110.
As shown in FIG. 3, the electrolyte retaining structure 130 may be positioned at the side of the electrode assembly 110.
In the case in which the electrolyte retaining structure 130 is positioned at the side of the electrode assembly 110, the electrolyte is filled in the space formed in the electrolyte retaining structure 130, such that in the case in which charging and discharging are generated in the electrode assembly 110 to consume the electrolyte, thereby causing insufficiency of the electrolyte, the electrolyte filled in the electrolyte retaining structure 130 is supplied to the electrode assembly 110.
In this case, it is preferable that the electrolyte retaining structure 130 has an opened path in a surface thereof contacting the electrode assembly 110 so that the electrolyte may move, in order to smoothly supply the electrolyte to the electrode assembly 110.
As shown in FIG. 4, the electrolyte retaining structure 130 may be positioned at the upper portion of the electrode assembly 110.
In the case in which the electrolyte retaining structure 130 is positioned at the upper portion of the electrode assembly 110, the electrolyte is filled in the space formed in the electrolyte retaining structure 130, such that in the case in which charging and discharging are generated in the electrode assembly 110 to consume the electrolyte, thereby causing insufficiency of the electrolyte, the electrolyte filled in the electrolyte retaining structure 130 is supplied to the electrode assembly 110.
In addition, since the cathode tab 111 and the anode tab 112 are positioned at the upper portion of the electrode assembly 110, it is preferable that the electrolyte retaining structure is positioned at a position at which it does not interfere with the cathode tab 111 and the anode tab 112.
That is, it is preferable that the electrolyte retaining structure 130 is positioned at one or more of an outer portion of the cathode tab 111, an outer portion of the anode tab 112, and a portion between the cathode tab 111 and the anode tab 112.
In this case, it is preferable that the electrolyte retaining structure 130 has an opened path in a surface thereof contacting the electrode assembly 110 so that the electrolyte may move, in order to smoothly supply the electrolyte to the electrode assembly 110.
Further, in the case in which the electrolyte retaining structure 130 is positioned at the upper portion of the electrode assembly 110, the electrolyte in the electrolyte retaining structure 130 may be supplied to the electrode assembly 110 by gravity.
A shape of the electrolyte retaining structure 130 according to the exemplary embodiment of the present invention will be described with reference to FIGS. 5A and 5B.
The electrode retaining structure 130 may be manufactured as a lattice type structure 131 having a lattice shape. That is, the lattice type structure 131 is manufactured in a rectangular pillar shape and has an inner portion formed in a lattice shape, such that a space capable of retaining the electrolyte may be formed therein (See FIG. 5A).
In this case it is preferable that a surface of the lattice type structure 131 through which the electrolyte moves is positioned at a portion at which it contacts the electrode assembly 110, such that the electrolyte may be smoothly supplied to the electrode assembly 110.
The electrode retaining structure 130 may be manufactured as a pipe type structure 132 having a pipe shape. The pipe type structure 132 may be manufactured to have a plurality of holes perforated in an outer peripheral surface thereof, such that inner and outer portions thereof may be in communication with each other. That is, the pipe type structure 132 is manufactured in the pipe shape, such that the electrolyte may be retained therein, and has the plurality of holes perforated in then outer peripheral surface thereof to receive the electrolyte therein, thereby making it possible to supply the electrolyte to the electrode assembly 110 (See FIG. 5B).
Here, it is preferable that the electrolyte retaining structure 130 is disposed so that the electrolyte may be smoothly supplied to the electrode assembly 110 since the electrolyte retaining structure 130 has a number of holes formed in a surface through which the electrolyte moves.
Therefore, with the battery modules 100 according to the exemplary embodiment of the present invention, the electrolyte retaining structure 130 capable of retaining the electrolyte is inserted into the pouch, thereby making it possible to store an extra electrolyte in the battery module 100, prevent the electrolyte from being discharged to the outside in a degassing process, and improve lifespan and storage characteristics of a battery by supplying the electrolyte corresponding to an amount of electrolyte decomposed and consumed in the case in which the electrolyte is consumed during repetitive charging and discharging of the battery module 100.

Claims (7)

  1. A battery module comprising:
    an electrode assembly including a plurality of cathode plates, a plurality of anode plates, and a plurality of separators each interposed between the plurality of cathode plates and the plurality of anode plates;
    a pouch receiving the electrode assembly therein; and
    an electrode retaining structure received together with the electrode assembly in the pouch and having a space capable of retaining an electrolyte.
  2. The battery module of claim 1, wherein the electrode retaining structure has the same thickness as that of the electrode assembly.
  3. The battery module of claim 1, wherein the electrode retaining structure is positioned at a lower portion of the electrode assembly.
  4. The battery module of claim 1, wherein the electrode retaining structure is positioned at a side of the electrode assembly.
  5. The battery module of claim 1, wherein the electrode retaining structure is positioned at an upper portion of the electrode assembly and is positioned at a position at which it does not interfere with an anode tap and a cathode tap of the electrode assembly.
  6. The battery module of claim 1, wherein the electrode retaining structure is manufactured in a lattice shape.
  7. The battery module of claim 1, wherein the electrode retaining structure is manufactured in a pipe shape in which it has a plurality of holes perforated therein.
PCT/KR2012/006048 2011-08-24 2012-07-30 Battery module WO2013027935A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US14/126,039 US20140154554A1 (en) 2011-08-24 2012-07-30 Battery module
CN201280040609.0A CN103748707A (en) 2011-08-24 2012-07-30 Battery module
EP20120826220 EP2748881A4 (en) 2011-08-24 2012-07-30 Battery module

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2011-0084254 2011-08-24
KR1020110084254A KR101327777B1 (en) 2011-08-24 2011-08-24 Battery Module

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WO2013027935A1 true WO2013027935A1 (en) 2013-02-28

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EP (1) EP2748881A4 (en)
JP (1) JP2014529855A (en)
KR (1) KR101327777B1 (en)
CN (1) CN103748707A (en)
WO (1) WO2013027935A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102316436B1 (en) 2014-11-17 2021-10-22 삼성전자주식회사 Method for controlling different kind of battery cells and electronic device thereof
KR101646381B1 (en) 2014-11-20 2016-08-05 현대자동차주식회사 Pouch cell
JP6686286B2 (en) * 2015-03-30 2020-04-22 三洋電機株式会社 Prismatic secondary battery and assembled battery using the same
KR101936074B1 (en) * 2015-05-12 2019-01-09 주식회사 엘지화학 Battery Cell Comprising Electrolyte-Containing Member for Supplying Electrolyte
KR102019061B1 (en) * 2015-09-08 2019-09-10 주식회사 엘지화학 Secondary Battery Comprising Electrode Assembly with Protrusion Portion and Storage Member for Electrolyte
US20190067729A1 (en) * 2017-08-29 2019-02-28 GM Global Technology Operations LLC Lithium ion electrochemical devices having excess electrolyte capacity to improve lifetime
JP7059644B2 (en) * 2018-01-23 2022-04-26 トヨタ自動車株式会社 Non-aqueous electrolyte secondary battery
CN113764787B (en) * 2020-05-18 2022-12-09 比亚迪股份有限公司 Electricity core subassembly, battery package and car
JP7313391B2 (en) * 2021-03-25 2023-07-24 プライムプラネットエナジー＆ソリューションズ株式会社 secondary battery
JP2023539705A (en) * 2021-07-13 2023-09-19 寧徳時代新能源科技股▲分▼有限公司 Battery cells, batteries and electricity consuming devices
KR20230030788A (en) * 2021-08-26 2023-03-07 에스케이온 주식회사 Pouch for secondary battery and secondary battery comprising the same
KR20230090674A (en) * 2021-12-15 2023-06-22 에스케이온 주식회사 Battery module
KR20230090675A (en) * 2021-12-15 2023-06-22 에스케이온 주식회사 Lithium secondary battery

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005149916A (en) * 2003-11-17 2005-06-09 Shin Kobe Electric Mach Co Ltd Control valve type lead storage battery
US20050191549A1 (en) * 2004-01-30 2005-09-01 Kang Hee G. Battery having specific package structure
KR20050120465A (en) * 2004-06-19 2005-12-22 삼성에스디아이 주식회사 Secondary battery with means for supplying electrolyte
KR20070021583A (en) * 2005-08-19 2007-02-23 주식회사 엘지화학 Secondary Battery of High Energy Density
JP2008262738A (en) * 2007-04-10 2008-10-30 Hitachi Maxell Ltd Enclosd battery

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591422A (en) * 1969-04-03 1971-07-06 Eltra Corp Water-activable battery utilizing absorbent open-celled material
JPS4835333A (en) * 1971-09-07 1973-05-24
JPS5240732B2 (en) * 1973-05-21 1977-10-14
JP2002117814A (en) * 2000-10-05 2002-04-19 Sanyo Electric Co Ltd Square-shaped sheath can and battery using this
US20030162085A1 (en) * 2002-02-25 2003-08-28 Sauseda Cynthia Carol Separator configuration providing a reservoir and wicking system for electrolyte
KR100570625B1 (en) * 2004-07-28 2006-04-12 삼성에스디아이 주식회사 Secondary battery
JP4803360B2 (en) * 2005-12-02 2011-10-26 三菱自動車工業株式会社 Lithium ion secondary battery
WO2007118358A1 (en) * 2006-04-17 2007-10-25 Citic Guoan Mengguli New Energy Technology Co., Ltd. A lithium ion battery
JP5096851B2 (en) * 2007-09-19 2012-12-12 富士重工業株式会社 Method for manufacturing power storage device
JP5252937B2 (en) * 2008-01-31 2013-07-31 三洋電機株式会社 Stacked battery and method for manufacturing the same
US20090197160A1 (en) * 2008-01-31 2009-08-06 Sanyo Electric Co., Ltd. Stack type battery
JP2012243672A (en) * 2011-05-23 2012-12-10 Nec Corp Lithium ion secondary battery

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005149916A (en) * 2003-11-17 2005-06-09 Shin Kobe Electric Mach Co Ltd Control valve type lead storage battery
US20050191549A1 (en) * 2004-01-30 2005-09-01 Kang Hee G. Battery having specific package structure
KR20050120465A (en) * 2004-06-19 2005-12-22 삼성에스디아이 주식회사 Secondary battery with means for supplying electrolyte
KR20070021583A (en) * 2005-08-19 2007-02-23 주식회사 엘지화학 Secondary Battery of High Energy Density
JP2008262738A (en) * 2007-04-10 2008-10-30 Hitachi Maxell Ltd Enclosd battery

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2748881A4 *

Also Published As

Publication number Publication date
EP2748881A4 (en) 2015-05-20
KR20130021784A (en) 2013-03-06
CN103748707A (en) 2014-04-23
EP2748881A1 (en) 2014-07-02
KR101327777B1 (en) 2013-11-12
JP2014529855A (en) 2014-11-13
US20140154554A1 (en) 2014-06-05

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