WO2013187687A1 - Module de batterie secondaire facile à assembler - Google Patents

Module de batterie secondaire facile à assembler Download PDF

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Publication number
WO2013187687A1
WO2013187687A1 PCT/KR2013/005165 KR2013005165W WO2013187687A1 WO 2013187687 A1 WO2013187687 A1 WO 2013187687A1 KR 2013005165 W KR2013005165 W KR 2013005165W WO 2013187687 A1 WO2013187687 A1 WO 2013187687A1
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WO
WIPO (PCT)
Prior art keywords
terminal
connection mold
battery cells
cathode
anode
Prior art date
Application number
PCT/KR2013/005165
Other languages
English (en)
Inventor
Tae Il Kim
Kwan Yong Kim
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.
Publication of WO2013187687A1 publication Critical patent/WO2013187687A1/fr

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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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • H01M50/147—Lids or covers
    • 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
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic 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
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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
    • 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
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side 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
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to an easily assembled secondary battery module capable of coupling battery cells to each other to be easily configured as a module, improving a low mechanical strength of the battery cell, and easily achieving an electrical connection between the battery cells.
  • a secondary battery is capable of being charged and discharged to be applied to various fields such as a digital camera, a cellular phone, a notebook and a hybrid car, unlike a primary battery, and research thereof has been actively conducted.
  • An example of the secondary battery may include a nickel-cadmium battery, a nickel-metal hydride battery, a nickel-hydrogen battery, and a lithium secondary battery.
  • the secondary batteries research into a lithium secondary battery having high energy density and discharge voltage has been largely conducted and the lithium secondary battery has been commercialized to be widely used.
  • the lithium secondary battery is capable of being manufactured so as to have various shapes, and cylindrical type and prismatic type lithium secondary batteries have been usually exemplified as the lithium secondary battery.
  • a lithium polymer battery recently in the spotlight is manufactured in a pouched type having flexibility, such that the shape thereof is relatively varied.
  • the pouch typed lithium polymer battery (hereinafter, referred to as a “pouch typed cell”) is easily bent or curved, a compact case is coupled to the outside thereof to reinforce a low strength of the pouch typed cell.
  • a plurality of pouch typed cells are stacked to be configured as a battery module or a battery pack.
  • the pouch typed cell does not have an excellent mechanical strength of the pouch sealing an electrode body
  • the pouch typed cells should be mounted on a pack case such as a cartridge, or the like, to manufacture the battery module and electrode tabs of the plurality of pouch typed cells should be electrically connected to each other in series or in parallel with each other, such that a size of the battery module is increased, and a structure thereof is complicated.
  • An object of the present invention is to provide an easily assembled secondary battery module capable of minimizing an increase in weight and size thereof while reinforcing a low mechanical strength of a battery cell, easily achieving an electrical connection between the battery cells, and more firmly fixing the battery cells to a case to thereby improve safety.
  • an easily assembled secondary battery module includes: two battery cells having electrode tabs formed at one side thereof and stacked in parallel with each other; a case having opened both sides to receive the battery cells therein; a lower cap coupled to the opened one side of the case and coupled to an opposite side to a side at which the electrode tabs are positioned; a connection mold having a plurality of terminals formed at one side thereof and inserted between facing electrode tabs of the two battery cells, such that the terminals are connected to the electrode tabs; and an upper cap coupled to the opened other side of the case to which the lower cap is coupled and having a cut part formed therein so that the terminals of the connection mold are exposed to the outside.
  • the two battery cells may be stacked so that a cathode tab and an anode tab face each other, and the terminal may include a cathode terminal, an anode terminal, and a voltage sensing terminal, the cathode terminal being connected to the cathode tab of a first battery cell, the anode terminal being connected to the anode tab of a secondary battery cell, and the voltage sensing terminal being connected to the anode tab of the first battery cell and the cathode tab of the secondary battery cell.
  • the cathode terminal may be bent from an upper surface to one side surface of the connection mold, the anode terminal may be bent from the upper surface to the other side surface of the connection mold, and the voltage sensing terminal may be bent from the upper surface to both side surfaces of the connection mold.
  • the two battery cells may be stacked so that cathode tabs face each other and anode tabs face each other, and the terminal may include a cathode terminal and an anode terminal, the cathode terminal being connected to the cathode tab of the battery cells and the anode terminal being connected to the anode tab of the battery cells.
  • the cathode terminal and the anode terminal may be bent from an upper surface to both side surfaces of the connection mold.
  • an easily assembled secondary battery module includes: two battery cells having electrode tabs formed at one side thereof and stacked in parallel with each other; a case having opened both sides to receive the battery cells therein; a lower cap coupled to the opened one side of the case and coupled to an opposite side to a side at which the electrode tabs are positioned; a first connection mold inserted between the facing electrode tabs of the two battery cells, such that one side thereof is fixed to the battery cells; a second connection mold having a plurality of terminals formed at one side thereof and coupled to the other side of the first connection mold, such that the terminals are connected to the electrode tabs; and an upper cap coupled to the opened other side of the case to which the lower cap is coupled and having a cut part formed therein so that the terminals of the second connection mold are exposed to the outside.
  • the two battery cells may be stacked so that a cathode tab and an anode tab face each other, and the terminal may include a cathode terminal, an anode terminal, and a voltage sensing terminal, the cathode terminal being connected to the cathode tab of a first battery cell, the anode terminal being connected to the anode tab of a secondary battery cell, and the voltage sensing terminal being connected to the anode tab of the first battery cell and the cathode tab of the secondary battery cell.
  • the cathode terminal may be bent from an upper surface to one side surface of the second connection mold, the anode terminal may be bent from the upper surface to the other side surface of the second connection mold, and the voltage sensing terminal may be bent from the upper surface to both side surfaces of the second connection mold.
  • the two battery cells may be stacked so that the cathode tabs face each other and the anode tabs face each other, and the terminal may include a cathode terminal and an anode terminal, the cathode terminal being connected to the cathode tab of the battery cells and the anode terminal being connected to the anode tab of the battery cells.
  • the cathode terminal and the anode terminal may be bent from an upper surface to both side surfaces of the second connection mold.
  • the first connection mold may have a hollow part formed at both sides each thereof in a length direction and having an opened upper surface, each of both side surfaces of the hollow part may have a coupling hole, and each of both sides of a lower surface of the second connection mold may have a hook inserted into the hollow part of the first connection mold to be coupled to the coupling hole.
  • the first connection mold may have a fixing groove formed at both sides each thereof, such that a pouch of the two battery cells may be inserted into the fixing groove.
  • the second connection mold may have a pair of guide plates formed at the center of both side surfaces thereof, such that the first connection mold and the pouch of the two battery cells may be inserted between the guide plates.
  • the case may be made of a plate material having a resin layer coated on both surfaces thereof, and may be manufactured by bending the plate material, folding both ends of the plate material, and then welding the both ends of the plate material to each other.
  • the case may have at least one open part in which a temperature sensor is installed.
  • the second connection mold may have an insertion groove and a through-hole formed at both sides each thereof in a length direction, the insertion groove having a nut inserted thereinto, and the upper cap may have a fixing hole formed at both sides thereof in the length direction to be coupled to the nut by a bolt at an outer side of the upper cap, the fixing hole corresponding to the through-hole.
  • the battery cells may be firmly fixed in the case to improve the safety, the battery cells may be fixed in the compact case to increase utilization of the space, and it is easy to electrically connect the electrode tabs of the battery cells to each other to thereby be easily assembled as the module.
  • FIGS. 1A and 1B are perspective views showing a battery cell according to an embodiment of the present invention.
  • FIGS. 2 and 3 are an exploded perspective view and an assembly perspective view showing an easily assembled secondary battery module according to an embodiment of the present invention, respectively;
  • FIGS. 4A and 4B and 5A and 5B are cross-sectional views taken along lines AA’, BB’, CC’, and DD’ of FIG. 3, respectively;
  • FIG. 6 is an exploded perspective view showing an easily assembled secondary battery module according to another embodiment of the present invention.
  • FIGS. 7A and 7B and 8A and 8B are an exploded perspective view and an assembly perspective view showing a first connection mold and a second connection mold according to the embodiment of the present invention
  • FIGS. 9A and 9B and 10A and 10B are cross-sectional views showing each cross section of the assembled secondary battery module of FIG. 6;
  • FIG. 11 is an exploded perspective showing a structure in which an upper cap and a second connection mold are coupled to each other according to the embodiment of the present invention
  • FIGS. 12A and 12B are schematic views showing an exemplary embodiment of a case according to the embodiment of the present invention.
  • FIG. 13 is a cross-sectional view showing a state in which a lower cap is coupled in the case according to the embodiment of the present invention.
  • FIG. 14 is a cross-sectional view showing a structure in which the first connection mold and the battery cell are coupled to each other according to the embodiment of the present invention.
  • 100a first battery cell 100b: second battery cell
  • electrode body 120 electrode tab
  • metal plate 320 resin layer
  • 500a first connection mold 500b: second connection mold
  • terminal 511 cathode terminal
  • fixing groove 531 fixing wing
  • FIGS. 2 and 3 are an exploded perspective view and an assembly perspective view showing the easily assembled secondary battery module according to an embodiment of the present invention, respectively.
  • the easily assembled secondary battery module 1000 may include: two battery cells 100 having electrode tabs 120 formed at one side thereof and stacked in parallel with each other; a case 300 having opened both sides to receive the battery cells 100 therein; a lower cap 400 coupled to the opened one side of the case 300 and coupled to an opposite side to a side at which the electrode tabs 120 are positioned; a connection mold 500 having a plurality of terminals 510 formed at one side thereof and inserted between facing electrode tabs 120 of the two battery cells 100, such that the terminals 510 are connected to the electrode tabs 120; and an upper cap 600 coupled to the opened other side of the case 300 to which the lower cap 400 is coupled and having a cut part 610 formed therein so that the terminals 510 of the connection mold 500 are exposed to the outside.
  • the battery cell 100 has the electrode tab 120 formed at one side of an electrode body 110 as shown in FIG. 1.
  • the electrode body 110 is configured of a cathode, an anode, an electrolyte, and a separating plate that separates the cathode and the anode to be charged and discharged, and the electrode tab 120 transmit a current generated from the electrode body 110 at the time of discharging or a current introduced from the outside at the time of charging.
  • the battery cell 100 may be a pouch typed cell sealed by being surrounded with pouch 130 or may have an external member coupled to an outer side of the pouch typed cell, and the electrode body 110 sealed by the pouch 130 may protrude to only one side surface of the pouch 130 or both side surfaces thereof, based on the pouch 130.
  • the two battery cells 100 are stacked in parallel with each other so that the electrode tabs 120 face each other, and in the case in which the electrode body 110 protrudes to the one side surface of the pouch 130, the battery cells are stacked so that protruding sides of the electrode body 110 are in contact with each other, such that the pouch 130 of the two battery cells 100 is positioned at an outer portion in a width direction. That is, the battery cells 100 are stacked so that the electrode tabs 120 of the two battery cells 100 are spaced apart from each other without being in contact with each other.
  • the case 300 has opened both sides, such that the stacked two battery cells 100 are inserted into the case 300 and received therein.
  • the case 300 may be formed of a metal plate having a thin thickness of 0.1mm to 1.0mm, a central portion on both surfaces in a width direction may be recessed to an inner side of the case 300, or a plurality of grooves recessed to the inner side may be formed to allow the two battery cells 100 received in the case 300 to be closely adhered.
  • An inner portion of the lower cap 400 may be hollow and an upper side thereof may be opened, and the lower cap 400 are coupled to the opened portion of the case 300 at an opposite side to a side at which the electrode tabs 120 of the battery cells 100 are positioned in a state in which the two battery cells 100 are inserted in the case 300. That is, the lower cap 400 is formed in a cap type, and the opened lower side of the case 300 is inserted into a hollowed inner side of the lower cap 400 and fixed thereto, such that the lower side of the case 300 is closed.
  • the case in which the electrode tabs 120 protrude to the outside of the upper side of the case 300 is easier to achieve an electrical connection in the electrode tabs 120 by a welding process, such that it is preferable that the case 300 may be slightly shorter than the battery cell 100.
  • connection mold 500 having the plurality of terminals 510 formed therein may be inserted between the facing electrode tabs 120 of the two battery cells 100 and the inserted terminals 510 may be electrically connected to the electrode tabs 120 by the welding process. That is, since the connection mold 500 is inserted between the facing electrode tabs 120 of the two battery cells 100 to support the inner side thereof, the electrode tabs 120 are pressed in a width direction of the connection mold 500 from the side surface thereof to thereby be easily welded to the terminals 510, and the terminals 510 connected to the electrode tab 120 are fixed to the connection mold 500. In addition, before the connection mold 500 is inserted, a hot-melt, an adhesive, or the like, may be applied between the two battery cells 100 and the connection mold 500 may be inserted therebetween and fixed to the battery cell.
  • the upper cap 600 is coupled to the upper side of the inserted connection mold, the inner portion thereof is hollow, and the lower side thereof is opened, thereby being insertedly coupled to the outer side of the case 300.
  • the cut-part 610 may be formed so that the terminals 510 of the connection mold 500 are exposed to the outside, such that the upper cap 600 is coupled to the case 300 and then the terminals 510 may be connected to external circuits.
  • the battery cells are firmly fixed in the case to improve safety, and the battery cells may be fixed in the compact case to increase utilization of space, and it is easy to electrically connect the electrode tabs of the battery cells to each other to thereby be easily assembled as a module.
  • the two battery cells 100 are stacked so that a cathode tab 120a and an anode tab 120b face each other
  • the terminal 510 includes a cathode terminal 511, an anode terminal 512, and a voltage sensing terminal 513, the cathode terminal 511 being connected to the cathode tab 120a of a first battery cell 100a, the anode terminal 512 being connected to the anode tab 120b of a secondary battery cell 100b, and the voltage sensing terminal 513 being connected to the anode tab 120b of the first battery cell 100a and the cathode tab 120a of the secondary battery cell 100b.
  • the battery cells 100 are stacked so that the electrode tabs 120 having different polarities of the battery cells 100 face each other, and as shown in FIG. 4A, the cathode tab 120a of the first battery cell 100a and the anode tab 120b of the second battery cell 100b are connected to each other by the voltage sensing terminal 513, and as shown in FIG. 5, remaining anode tab 120b of the first battery cell 100a is connected to the anode terminal 512 and remaining cathode tab 120a of the second battery cell 100b is connected to the cathode terminal 511.
  • the cathode terminal 511 and the anode terminal 512 are formed at one side of the connection mold 500 in a length direction, and the voltage sensing terminal 513 is formed at the other side thereof in the length direction.
  • the two battery cells 100 may be connected to each other in series, such that the cathode terminal 511 and the anode terminal 512 may become output terminals connected to the external circuits, and the voltage sensing terminal 513 may be connected to the cathode terminal 511 and the anode terminal 512 through a separate protecting circuit, respectively, thereby measuring each voltage of the battery cells 100a and 100b.
  • the cathode terminal 511 may be bent from the upper surface to one side surface of the connection mold 500
  • the anode terminal 512 may be bent from the upper surface to the other side surface of the connection mold 500
  • the voltage sensing terminal 513 may be bent from the upper surface to both side surfaces of the connection mold 500.
  • the terminals 510 are easily coupled to the electrode tabs 120 by the welding process, and the terminals 510 formed on the upper surface of the connection mold 500 are bent so that the terminal 510 and the electrode tab 120 are coupled to each other by the welding process while they are overlapped with each other, such that the terminal is extended to the side surface of the connection mold 500 in the width direction.
  • the anode terminal 512 is bent toward the anode tab 120b of the first battery cell 100a so as to have a “ ⁇ ”shape
  • the cathode terminal 511 is bent toward the cathode tab 120a of the second battery cell 100b so as to have a “ ⁇ ”shape
  • the voltage sensing terminal 513 is bent toward the cathode tab 120a of the first battery cell 100a and the anode tab 120b of the second battery cell 100b so as to have a “ ⁇ ” shape.
  • the bent side surface of the terminals 510 and the electrode tabs 120 may be closely adhered in the width direction while being overlapped with each other and may be coupled to each other by the welding process, such that the electrical connection between the terminal and the electrode tab may be easily achieved.
  • the two battery cells 100 may be stacked so that the cathode tabs 120a face each other and the anode tabs 120b face each other, the terminal 510 may include the cathode terminal 511 and the anode terminal 512, the cathode terminal 511 may be connected to the cathode tab 120a of the battery cells 100, and the anode terminal 512 may be connected to the anode tab 120b of the battery cells 100.
  • the battery cells are stacked so that electrode tabs 120 having the same polarities of the battery cells 100 face each other, such that the cathode tabs 120a of the first battery cell 100a and the second battery cell 100b are connected to the cathode terminal 511, and the anode tabs 120b are connected to the anode terminal 512.
  • the cathode terminal 511 is formed at one side of the connection mold 500 in the length direction
  • the anode terminal 512 is formed at the other side thereof in the length direction.
  • the two battery cells 100 are connected to each other in parallel, such that the cathode terminal 511 and the anode terminal 512 may serve as the external terminal connected to the external circuit, and at the same time, may serve as the voltage sensing terminal connected through the separate protecting circuit.
  • the cathode terminal 511 and the anode terminal 512 may be bent from the upper surface to both side surfaces of the connection mold 500.
  • the terminals 510 are easily coupled to the electrode tabs 120 by the welding process, and both sides of the cathode terminal 511 and the anode terminal 512 in the width direction are bent from the upper surface of the connection mold 500 so as to have a " ⁇ ” shape. Therefore, the bent side surface of the terminals 510 and the electrode tabs 120 may be closely adhered in the width direction while being overlapped with each other and may be coupled to each other by the welding process, such that the electrical connection between the terminal and the electrode tab may be easily achieved.
  • FIG. 6 is an exploded perspective view showing an easily assembled secondary battery module according to another embodiment of the present invention.
  • the easily assembled secondary battery module 1000 may include: two battery cells 100 having electrode tabs 120 formed at one side thereof and stacked in parallel with each other; a case 300 having opened both sides to receive the battery cells 100 therein; a lower cap 400 coupled to the opened one side of the case 300 and coupled to an opposite side to a side at which the electrode tabs 120 are positioned; a first connection mold 500a inserted between the facing electrode tabs 120 of the two battery cells 100, such that one side thereof is fixed to the battery cells 100; a second connection mold 500b having a plurality of terminals 510 formed at one side thereof and coupled to the other side of the first connection mold 500a, such that the terminals 510 are connected to the electrode tabs 120; and an upper cap 600 coupled to the opened other side of the case 300 to which the lower cap 400 is coupled and having a cut part 610 formed therein so that the terminals 510 of the second connection mold 500b are exposed to the outside.
  • connection mold 500 is configured of the first connection mold 500a and the second connection mold 500b, wherein the first connection mold 500a is inserted between the facing electrode tabs 120 of the two battery cells 100 and fixed thereto, an upper side of the first connection mold 500a is provided with the second connection mold 500b, and an upper side of the second connection mold 500b is provided with the plurality of terminals 510, such that the terminals 510 are connected to the electrode tabs 120.
  • the two battery cells 100 may be stacked so that the cathode tab 120a and the anode tab 120b face each other, the terminal 510 may include the cathode terminal 511, the anode terminal 512, and the voltage sensing terminal 513. As shown in FIGS.
  • the cathode terminal 511 may be connected to the cathode tab 120a of the first battery cell 100a
  • the anode terminal 512 may be connected to the anode tab 120b of the second battery cell 100b
  • the voltage sensing terminal 513 may be connected to the anode tab 120b of the first battery cell 100a and the cathode tab 120a of the second battery cell 100b, such that the battery cells 100 may be connected to each other in series.
  • the cathode terminal 511 may be bent from the upper surface to one side surface of the second connection mold 500b
  • the anode terminal 512 may be bent from the upper surface to the other side surface of the second connection mold 500b
  • the voltage sensing terminal 513 may be bent from the upper surface to both side surfaces of the second connection mold 500b.
  • the two battery cells 100 may be stacked so that the cathode tabs 120a face each other and the anode tabs 120b face each other, and the terminal 510 may include the cathode terminal 511 and the anode terminal 512, wherein the cathode terminal 511 may be connected to the cathode tab 120a of the battery cells 100, and the anode terminal 512 may be connected to the anode tab 120b of the battery cells 100, such that the battery cells 100 may be connected to each other in parallel.
  • the cathode terminal 511 and the anode terminal 512 may be bent from the upper surface to the both side surfaces of the second connection mold 500b.
  • the first connection mold 500a may have a hollow part 520 formed at both sides each thereof in the length direction and having an opened upper surface, each of both side surfaces of the hollow part 520 may be provided with a coupling hole 521, and each of both sides of a lower surface of the second connection mold 500b may have a hook 540 inserted into the hollow part 520 of the first connection mold 500a to be coupled to the coupling hole 520. Therefore, after the first connection mold 500a is inserted between the facing electrode tabs 120 of the battery cells 100 and fixed to the battery cell, the second connection mold 500b may be press-fitted from the upper side of the first connection mold, thereby making it possible to be easily coupled to each other.
  • connection mold 500 is easily fixed between the battery cells 100 as compared to the former case in which the connection mold 500 is formed integrally with each other.
  • the adhesive, or the like may be applied between the battery cells 100 having the connection mold 500 inserted thereinto, the first connection mold 500a is then inserted into the first connection mold and fixed thereto, and the second connection mold 500b is easily coupled to the upper side of the first connection mold, thereby improving an assembling property.
  • guides 541 protrude at the both sides in the length direction of the second connection mold 500b having the hook 540 formed therein, and the hook 540 is inserted into the hollow part 520 of the first connection mold 500a, thereby being easily coupled to the coupling hole 521.
  • the first connection mold 500a may have fixing grooves 530 formed at both sides thereof, such that the pouch 130 of the two battery cells 100 may be inserted into the fixing groove 530. That is, as shown in FIGS. 11 and 14, the fixing groove 530 may be formed by a fixing wing 531 protruding to the outside from the upper end of both sides in the length direction of both side surfaces of the first connection mold 500a in the width direction, such that when the first connection mold 500a is inserted between the battery cells 100, the pouch 130, which is an edge portion of an upper side of the battery cell 100, is inserted into the fixing groove 530.
  • the first connection mold 500a is caught by the pouch 130 of the battery cells 100 due to the fixing groove 530, such that a depth by which the first connection mold 500a is inserted into the lower side of the battery cell may be accurately determined, and it is easy to horizontally maintain the battery cells 100 and the first connection mold 500a.
  • the second connection mold 500b coupled to the upper side of the first connection mold 500a is horizontally maintained, a position at which the terminals 510 formed in the second connection mold 500b and the electrode tabs 120 are coupled to each other may be accurately determined.
  • the second connection mold 500b may have a pair of guide plates 550 formed at the center of both side surfaces thereof in the width direction, such that the first connection mold 500a and the pouch 130 of the two battery cells 100 may be inserted between the guide plates 550. That is, as shown in FIGS. 9B and 11, when the second connection mold 500b is inserted between the electrode tabs 120 facing each other of the battery cells 100, since a portion of the pouch 130 of the battery cells 100 is inserted to the inner side of the pair of guide plates 550, the electrode tabs 120 are positioned so as to be close to the side surface of the terminal 510, such that the welding process may be easily performed.
  • the case 300 may be made of a plate material having a resin layer coated on both surfaces thereof and may be manufactured by bending the plate material, folding both ends of the plate material, and then welding both ends of the plate material to each other. That is, as shown in FIG. 12, in the case 300, the resin layer 320 may be coated on both surfaces of the metal plate 310, wherein the resin layer 320 may be made of various resins containing casting poly propylene (CPP).
  • CPP casting poly propylene
  • the resin layer 320 is coated on both surfaces of the metal plate 310, at the time of bending both sides thereof, folding both ends so as to be alternated with each other, and welding both ends to each other, adhesive property is improved, and after the battery cell module is manufactured, insulation property is improved by the resin layer 320 formed at an inner side and an outer side of the case 300.
  • the case 300 may have at least one open part, wherein the open part may have a temperature sensor installed therein. That is, temperature of the battery cells 100 may be measured by inserting the temperature sensor through the open part (not shown) formed at one side of the case 300.
  • the second connection mold 500b may have an insertion groove 560 and a through-hole 561 formed at both sides each thereof in the length direction, the insertion groove having a nut 570 inserted thereinto, and the upper cap 600 may have a fixing hole 620 formed at both sides thereof in the length direction to be coupled to the nut 570 by a bolt 571 at the outer side of the upper cap 600, the fixing hole corresponding to the through-hole 561.
  • the second connection mold 500b may be made of a plastic resin
  • the nut 570 made of a metal material is inserted into the insertion groove 560, fixed thereto, is covered by the upper cap 600 to be coupled to each other.
  • the bolt 571 is used to pass through the fixing hole 620 and the through-hole 561 at the outer side of the upper cap 600 so as to be coupled to the nut 570, such that the upper cap 600 may be firmly fixed to the second connection mold 500b.
  • connection molds 500, 500a, and 500b and the upper cap 600 may be made of a plastic material for an electrical insulation
  • the lower cap 400 may be made of various materials such as plastic or a metal material.
  • the inner side of the lower cap 400 may be coated with a molten resin such as a hot melt, an adhesive agent, and the like, in order to fix the battery cells 100 to the case 300, and after the lower cap 400 is coupled to the lower side of the case 300, an injection inlet 410 may be formed in order to inject the molten resin, the adhesive agent, and the like.
  • a molten resin such as a hot melt, an adhesive agent, and the like
  • first connection mold 500a may be provided with a gas collecting part recessed to the center of both side surfaces in the width direction
  • the second connection mold 500b may be provided with a gas discharge pipe which is connected to the gas collecting part to discharge the gas to the outside
  • the upper cap 600 may be provided with the through-hole so that the gas discharge pipe is exposed to the outside. Accordingly, in the case in which the gas is generated by a defect of the battery cell 100, the discharged gas may be collected to the upper side of the battery cells 100 to be discharged to the outside of the second battery module through the gas discharge pipe.
  • both side surfaces of the upper cap 600 in the width direction are provided with a protrusion 630 and a groove 640, such that when a battery pack is configured by stacking a plurality of secondary battery modules, a position to be coupled to each other may be accurately determined.

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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)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

La présente invention concerne un module de batterie secondaire facile à assembler dans lequel deux cellules de batterie empilées parallèlement l'une à l'autre sont reçues dans un logement, un côté inférieur est couplé à un couvercle inférieur, un moule de liaison est introduit entre des languettes d'électrodes se faisant face des deux cellules de batterie de sorte que les bornes sont connectées aux languettes d'électrodes, et un couvercle supérieur est ensuite couplé à un côté supérieur du moule de liaison. L'invention permet une configuration facile, comme module, des cellules de batterie couplées l'une à l'autre, améliore la faible résistance mécanique de la cellule de batterie et permet d'établir facilement une connexion électrique entre les cellules de batterie.
PCT/KR2013/005165 2012-06-12 2013-06-12 Module de batterie secondaire facile à assembler WO2013187687A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201261658487P 2012-06-12 2012-06-12
KR10-2012-0062398 2012-06-12
US61/658,487 2012-06-12
KR1020120062398A KR101908587B1 (ko) 2012-06-12 2012-06-12 조립이 용이한 이차전지모듈

Publications (1)

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WO2013187687A1 true WO2013187687A1 (fr) 2013-12-19

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KR (1) KR101908587B1 (fr)
WO (1) WO2013187687A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2905824A1 (fr) * 2014-02-11 2015-08-12 Samsung SDI Co., Ltd. Bloc-batteries
CN114171778A (zh) * 2020-09-11 2022-03-11 丰田自动车株式会社 二次电池
US20230145017A1 (en) * 2021-11-09 2023-05-11 Amita Technologies Inc. Battery module

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070264563A1 (en) * 2006-02-09 2007-11-15 Lg Chem, Ltd. Frame member for fabrication of battery module
US20090258285A1 (en) * 2008-04-11 2009-10-15 Heong-Sin Kim Battery pack
US20090317703A1 (en) * 2008-06-20 2009-12-24 Samsung Sdi Co. Ltd. Battery pack
US20110091747A1 (en) * 2009-10-21 2011-04-21 Samsung Sdi Co., Ltd. Battery assembly
US20110117399A1 (en) * 2009-11-16 2011-05-19 Changbum Ahn Lithium polymer secondary battery

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070264563A1 (en) * 2006-02-09 2007-11-15 Lg Chem, Ltd. Frame member for fabrication of battery module
US20090258285A1 (en) * 2008-04-11 2009-10-15 Heong-Sin Kim Battery pack
US20090317703A1 (en) * 2008-06-20 2009-12-24 Samsung Sdi Co. Ltd. Battery pack
US20110091747A1 (en) * 2009-10-21 2011-04-21 Samsung Sdi Co., Ltd. Battery assembly
US20110117399A1 (en) * 2009-11-16 2011-05-19 Changbum Ahn Lithium polymer secondary battery

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2905824A1 (fr) * 2014-02-11 2015-08-12 Samsung SDI Co., Ltd. Bloc-batteries
US9257691B2 (en) 2014-02-11 2016-02-09 Samsung Sdi Co., Ltd. Battery pack
US9653760B2 (en) 2014-02-11 2017-05-16 Samsung Sdi Co., Ltd. Battery pack
CN114171778A (zh) * 2020-09-11 2022-03-11 丰田自动车株式会社 二次电池
US20220085472A1 (en) * 2020-09-11 2022-03-17 Toyota Jidosha Kabushiki Kaisha Secondary battery
US11894579B2 (en) * 2020-09-11 2024-02-06 Toyota Jidosha Kabushiki Kaisha Secondary battery
US20230145017A1 (en) * 2021-11-09 2023-05-11 Amita Technologies Inc. Battery module
US11955664B2 (en) * 2021-11-09 2024-04-09 Amita Technologies Inc. Battery module

Also Published As

Publication number Publication date
KR20130138894A (ko) 2013-12-20
KR101908587B1 (ko) 2018-10-17

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