WO2017221536A1 - Élément de cadre et bloc-batterie utilisant l'élément de cadre - Google Patents

Élément de cadre et bloc-batterie utilisant l'élément de cadre Download PDF

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Publication number
WO2017221536A1
WO2017221536A1 PCT/JP2017/015823 JP2017015823W WO2017221536A1 WO 2017221536 A1 WO2017221536 A1 WO 2017221536A1 JP 2017015823 W JP2017015823 W JP 2017015823W WO 2017221536 A1 WO2017221536 A1 WO 2017221536A1
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WO
WIPO (PCT)
Prior art keywords
rectangular frame
frame member
frame
rectangular
flat plate
Prior art date
Application number
PCT/JP2017/015823
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English (en)
Japanese (ja)
Inventor
和人 廣間
禎広 小宮
Original Assignee
Ｎｅｃエナジーデバイス株式会社
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 Ｎｅｃエナジーデバイス株式会社 filed Critical Ｎｅｃエナジーデバイス株式会社
Priority to JP2018523545A priority Critical patent/JP6595108B2/ja
Publication of WO2017221536A1 publication Critical patent/WO2017221536A1/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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch 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
    • H01M50/10—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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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 a frame member used when laminating unit batteries using a laminate exterior material, and a battery pack using such a frame member.
  • Lithium ion secondary batteries which are charged and discharged by moving lithium ions between the negative electrode and the positive electrode, have been applied in various fields in recent years because of their high energy density and high output battery characteristics. .
  • a laminate in which an aluminum foil or the like and a synthetic resin are laminated on the exterior of the lithium ion secondary battery is advantageous in that it is highly flexible and lightweight. Film exterior materials are often used.
  • a battery using a laminate film exterior material includes an electrode laminate in which a plurality of positive electrodes and a plurality of negative electrodes are laminated via a separator, and an electrolyte solution impregnating the electrode laminate in the laminate film exterior material.
  • the periphery of the laminate film exterior material is sealed by heat welding.
  • the laminate film exterior material is a flexible material, it is necessary to use some case when a plurality of lithium ion secondary batteries using the laminate film exterior material are stacked to form a battery pack.
  • Patent Document 1 International Publication No. 2014/196331
  • a frame is used, and the outer peripheral portion of the frame is arranged so as to be positioned between the flanges of adjacent film-clad batteries, and the battery pack is used. It is disclosed.
  • International Publication No. 2014/196331 International Publication No. 2014/196331
  • Patent Document 1 there is a problem that it is difficult to position the film-clad battery when the film-clad battery is attached to the frame and the battery pack is assembled. In addition, there is a problem that the productivity of the battery pack is reduced due to the difficulty in positioning the film-clad battery with respect to the frame.
  • This invention solves the above problems, and the frame member which concerns on this invention is extended in the thickness direction of the said rectangular frame from the rectangular frame and the outermost peripheral side surface of the said rectangular frame.
  • the convex flat plate portion and the thin concave portion are arranged side by side in the thickness direction of the rectangular frame body, and the convex flat plate portion passes from the space outside the rectangular frame body through the rectangular frame body.
  • a plurality of position restricting protrusions protruding in a direction toward the rectangular frame body space are arranged.
  • the frame member according to the present invention is characterized in that the convex flat plate portions and the thin concave portions are alternately arranged in a direction surrounding the rectangular frame body in a rectangular shape.
  • the frame member according to the present invention is characterized in that an engaging step portion is disposed between the convex flat plate portion and the thin concave portion adjacent to each other in a direction surrounding the rectangular frame body in a rectangular shape. To do.
  • the frame member according to the present invention is characterized by having an intermediate plate that shields the space in the rectangular frame body in the thickness direction.
  • the battery pack according to the present invention is characterized in that a unit battery having a laminate film exterior material is sandwiched between the first frame member and the second frame member.
  • the battery pack according to the present invention is characterized in that the position of the peripheral edge of the unit battery is regulated by the position regulating projection.
  • the convex flat plate portion is provided with a plurality of position restricting protrusions protruding in a direction from the outer space of the rectangular frame toward the space of the rectangular frame while passing through the rectangular frame. Therefore, according to such a frame member according to the present invention, the unit battery can be easily positioned, and the workability at the time of manufacturing the battery pack can be improved.
  • the battery pack using the frame member according to the present invention is easy to manufacture and has high manufacturability.
  • FIG. 4 is a diagram illustrating a state in which a tab member 125 is joined to the positive electrode extraction tab 120 and the negative electrode extraction tab 120 of the unit battery 100. It is a figure which shows the example of a process of the extension tab member 125.
  • FIG. It is the figure which extracted and showed the unit battery 100 in the battery pack 1000 which concerns on embodiment of this invention. It is a disassembled perspective view of the battery pack 1000 which concerns on embodiment of this invention. It is a perspective view of the 1st frame member 300 concerning the embodiment of the present invention. It is a figure explaining the definition of the direction in a frame member.
  • FIG. 4 is a diagram illustrating a state in which a tab member 125 is joined to the positive electrode extraction tab 120 and the negative electrode extraction tab 120 of the unit battery 100. It is a figure which shows the example of a process of the extension tab member 125.
  • FIG. It is the figure which extracted and showed the unit battery 100 in the battery pack 1000 which concerns on embodiment of this invention. It is a disassembled
  • FIG. 7 is a drawing of the first frame member 300 according to the embodiment of the present invention and a perspective view seen from an angle different from FIG. 6. It is a perspective view of the 2nd frame member 400 concerning the embodiment of the present invention.
  • FIG. 10 is a drawing of the second frame member 400 according to the embodiment of the present invention and a perspective view seen from an angle different from FIG. 9. It is a figure explaining the manufacturing process of the battery pack 1000 which concerns on embodiment of this invention. It is a figure explaining positioning of the unit battery 100 by the 1st frame member 300 which concerns on embodiment of this invention. It is a figure explaining the manufacturing process of the battery pack 1000 which concerns on embodiment of this invention.
  • FIG. 3 is a diagram showing a cross section of a unit battery 100 held between a first frame member 300 and a second frame member 400. It is a figure explaining the cover member used for the battery pack 1000 which concerns on embodiment of this invention.
  • 1 is a perspective view of a battery pack 1000 according to an embodiment of the present invention.
  • FIG. 1 is a diagram showing a unit battery 100 constituting a battery pack according to an embodiment of the present invention.
  • a lithium ion secondary battery that is a kind of electrochemical element in which charging and discharging are performed by moving lithium ions between a negative electrode and a positive electrode will be described as an example.
  • the invention can also be applied to power storage elements such as other types of batteries.
  • the battery main body 110 of the unit battery 100 has an electrode laminate in which a plurality of sheet-like positive electrodes and a plurality of sheet-like negative electrodes are laminated via a separator, and an electrolyte solution (both not shown) are rectangular in a plan view.
  • the structure is housed in a laminate film exterior material 80.
  • the battery main body 110 has a first side 111, a second side 112 that faces the first side 111, a third side 113, and a fourth side 114 that faces the third side 113.
  • the positive electrode extraction tab 120 and the negative electrode extraction tab 130 are arranged to be extracted from the first side 111.
  • the positive electrode pull-out tab 120 and the negative electrode pull-out tab 130 are both flat, and are connected to the sheet-shaped positive electrode and the sheet-shaped negative electrode directly or via a lead body in the laminate film exterior material 80, respectively.
  • the laminate film exterior material 80 has a configuration in which a resin layer and a metal layer such as an aluminum foil are laminated.
  • the electrode laminate including the sheet-like positive electrode, the sheet-like negative electrode, and the separator and the electrolytic solution are sealed by heat-welding the resin layer of the laminated film exterior member 80 facing each other. .
  • the metal piece drawn out from the battery body 110 made of the laminate film exterior material such as the positive electrode extraction tab 120 and the negative electrode extraction tab 130 is referred to as a “drawer tab”.
  • a sheet-like positive electrode or a sheet-like negative electrode laminated via an electrolytic solution or the like is referred to as an “electrode”.
  • the electrode laminate in addition to a laminate of a plurality of sheet-like positive electrodes and a plurality of sheet-like negative electrodes via a separator as described above, a laminate of a sheet-like positive electrode and a sheet-like negative electrode via a separator The thing which makes a laminated body by winding this and compressing this is also contained.
  • the positive electrode has a rectangular positive electrode main body portion and a strip-shaped positive electrode terminal portion extending from the positive electrode main body portion.
  • a positive electrode active material such as lithium cobalt composite oxide is applied to a thin plate-like aluminum plate.
  • the negative electrode has a rectangular negative electrode main body portion and a strip-shaped negative electrode terminal portion extending from the negative electrode main body portion.
  • a negative electrode active material such as graphite is applied to a thin nickel plate or copper plate.
  • the positive terminal portion of the positive electrode is conductively connected to the positive lead tab 120.
  • the negative electrode terminal portion of the negative electrode is conductively connected to the negative electrode extraction tab 130.
  • An aluminum plate or the like is used for the positive electrode extraction tab 120, and a nickel plate or a copper plate is used for the negative electrode extraction tab 130.
  • the negative electrode lead tab 130 is formed of a copper plate, the surface may be plated with nickel.
  • the separator is a sheet-like member that can be impregnated with an electrolytic solution, such as a microporous film (microporous film), a nonwoven fabric, or a woven fabric made of a thermoplastic resin such as polyolefin.
  • an electrolytic solution such as a microporous film (microporous film), a nonwoven fabric, or a woven fabric made of a thermoplastic resin such as polyolefin.
  • the laminate film exterior member 80 of the unit battery 100 is composed of two laminate films that sandwich and surround the electrode stack from both sides in the stacking direction, and the first side 111 and the first side of the opposing surfaces that overlap each other around the electrode stack.
  • the two sides 112, the third side 113, and the fourth side 114 are heat-welded to form a heat-welded portion 81, which is used as a sealing region, so that the electrode stack is sealed together with an electrolyte (not shown). ing.
  • the electrode laminate and the electrolytic solution are sealed with two laminate films.
  • the electrode laminate and the electrolyte may be sealed.
  • the positive electrode lead tab 120 is made of aluminum or an aluminum alloy
  • the negative electrode lead tab 130 is made of nickel
  • other metals are plated with nickel.
  • nickel-plated materials for example, nickel-plated copper
  • clads of nickel and other metals nickel-clad materials, for example, nickel-copper clad
  • copper and the like.
  • the unit battery 100 has a positive electrode extraction tab 120 containing aluminum and a negative electrode extraction tab 130 containing nickel.
  • a positive electrode extraction tab 120 made of aluminum and a negative electrode extraction tab 130 made of nickel are used.
  • FIG. 2 is a diagram illustrating a state in which the tab member 125 is joined to the positive electrode extraction tab 120 and the negative electrode extraction tab 120 of the unit battery 100.
  • the extension tab member 125 made of nickel is joined to the positive electrode extraction tab 120 and the negative electrode extraction tab 120 by ultrasonic welding, and the hole 127 to be added is used when the additional tab members 125 are screwed together by a spiral (not shown). Used for etc.
  • an extension tab 125 joined to the positive electrode pull-out tab 12 of one unit cell 100 and an add-on tab joined to the negative electrode lead-out tab 130 of the other unit cell 100.
  • 125 is mechanically coupled with a spiral or the like to solve the problem of conductivity deterioration due to the potential difference problem.
  • FIG. 3 is a view showing a processing example of the additional tab member 125.
  • FIG. 3 shows an example in which the extension tab 125 added to the positive electrode extraction tab 120 is bent 90 ° downward, and the extension tab 125 added to the negative electrode extraction tab 130 is bent 90 ° upward.
  • FIG. 4 is a diagram showing the unit battery 100 extracted from the battery pack 1000 according to the embodiment of the present invention.
  • FIG. 5 is an exploded perspective view of the battery pack 1000 according to the embodiment of the present invention.
  • the battery pack 1000 includes a first frame member 300 provided with an intermediate plate, a frame member such as a second frame member 400 provided with no intermediate plate, a first lid member 500, a second lid member 600, The first side plate 700, the second side plate 800, and the like serve as cases and have a structure in which a plurality of unit batteries 100 are accommodated.
  • the extension tab 125 indicated by the double arrow is screwed with a spiral (not shown) using the respective holes 127, so that electrical connection and mechanical connection are performed. Further, the shaft portion in which a spiral groove (not shown) used for electrical connection and mechanical connection is cut is accommodated in the first frame member 300, the second frame member 400, and the like in FIG. It has become.
  • the first frame member 300 and the second frame member 400 serve as a manufacturing jig for positioning the unit cell 100 when the unit cells 100 are stacked, in addition to being used for spiral fastening as described above.
  • the battery pack 1000 also functions as a casing.
  • the use of such a frame member such as the first frame member 300 and the second frame member 400 is one of the major features. explain.
  • Two types of frame members are used for the frame member according to the present invention, such as a first frame member 300 provided with an intermediate plate and a second frame member 400 provided with no intermediate plate.
  • first frame member 300 provided with the intermediate plate will be described.
  • FIG. 6 is a perspective view of the first frame member 300 according to the embodiment of the present invention.
  • FIG. 7 is a figure explaining the definition of the direction in a frame member.
  • FIG. 8 is a drawing of the first frame member 300 according to the embodiment of the present invention.
  • FIG. 8A is a front view of the rectangular frame 310
  • FIG. 8B is a view of the rectangular frame 310 viewed from the first side 311
  • FIG. 8D is a view of the rectangular frame 310 viewed from the third side 313
  • FIG. 8E is a view of the rectangular frame 310 viewed from the fourth side 314.
  • 8 (F) is a rear view of the rectangular frame 310
  • FIG. 8 (G) is a perspective view of the first frame member 300 viewed from an angle different from FIG.
  • the first frame member 300 has a substantially rectangular rectangular frame 310 as a basic structure.
  • the first frame member 300 is a synthetic resin member.
  • the rectangular frame 310 is not divided into a strict geometric rectangle. Further, since the frame member is made of synthetic resin, it has a structure in which reinforcing ribs are provided everywhere in order to save material costs and reduce weight.
  • the direction P in FIG. 7 is defined as the thickness direction of the rectangular frame 310.
  • the direction P is the same direction as the stacking direction of the electrode stack of the unit battery 100 when the unit battery 100 is accommodated in the frame member.
  • the Q directions of the first side 311, the second side 312, the third side 313, and the fourth side 314 in the rectangular frame 310 are different from each other. Further, the Q direction is orthogonal to the P direction.
  • the direction R in FIG. 7 is defined as the direction surrounding the rectangular frame 310 in a rectangular shape.
  • the R directions of the first side 311, the second side 312, the third side 313, and the fourth side 314 in the rectangular frame 310 are different from each other.
  • the R direction is orthogonal to the P direction.
  • the R directions of the first side 311, the second side 312, the third side 313, and the fourth side 314 are orthogonal to the respective Q directions.
  • the first frame member 300 is provided with an intermediate plate 305 that shields the space in the rectangular frame 310 in the thickness direction (P direction).
  • This intermediate plate 305 is not provided on the second frame member 400.
  • the presence or absence of the intermediate plate 305 is one of the major differences between the first frame member 300 and the second frame member 400.
  • the thickness in the direction Q in the first side 311, the second side 312, the third side 313, and the fourth side 314 of the rectangular frame 310 is thick enough to mount the heat welding portion 81 of the unit battery 100.
  • the portion of the electrode laminate of the unit battery 100 is dimensioned so as not to run over the thick portion.
  • the laminate film exterior member 80 on which the electrode laminate of the unit battery 100 is positioned is substantially in contact with the intermediate plate 305.
  • An intermediate plate 305 is provided.
  • the positive electrode pull-out tab 120, the negative electrode pull-out tab 130, and the additional tab member 125 of the unit battery 100 are provided on the first side 311 of the rectangular frame 310. It is placed on the tab placement part 340.
  • a space used for connecting the additional tab members 125 and a space for accommodating a lead wire (not shown) for monitoring the potential of the additional tab member 125 and the like are provided. It has been.
  • extension tab members 125 When the extension tab members 125 are connected to each other, they are spirally fastened by the holes 127 between the extension tab members 125, and a space in which the spiral shaft portion is accommodated is defined as a spiral shaft accommodation recess 363. It is provided on the side surface of the mounting portion 340.
  • the tab placement portion 340 is provided with lead wire accommodation spaces 352 that are spaces for accommodating the lead wires on both side portions of the tab placement portion 340.
  • the frame members according to the present invention are used by being stacked.
  • a tab side convex portion 343 and a tab side concave portion 344 are provided side by side on the tab placement portion 340 on the first side 311 as members used for positioning.
  • the tab side convex portion 343 in the lower frame member is fitted into the tab side concave portion 344 stacked thereabove.
  • stacked on the tab side recessed part 344 in a lower frame member fits. As a result, the frame members are sequentially positioned and stacked in an appropriate position upward.
  • a corner recess 335 is provided between the second side 312 and the third side 313 of the rectangular frame 310 of the frame member, and between the second side 312 and the fourth side 314 of the rectangular frame 310.
  • the corner protrusions 333 in the lower frame member are fitted into the corner recesses 335 stacked above them.
  • the corner convex portion 333 stacked above the corner concave portion 335 of the lower frame member is fitted. As a result, the frame members are sequentially positioned and stacked in an appropriate position upward.
  • the angular convex portion 333 can position the unit battery 100 when the battery pack 1000 is manufactured by restricting the position of the periphery of the unit battery 100.
  • the first frame member 300 has a convex flat plate portion 320 extending from the outermost peripheral side surface of the rectangular frame 310 in the thickness direction (P direction) of the rectangular frame 310.
  • the first frame member 300 has the outermost peripheral side surface of the rectangular frame 310 when viewed in the direction (Q direction) from the outer space of the rectangular frame 310 toward the inner space of the rectangular frame 310 while passing through the rectangular frame 310. It has a thin concave portion 325 that is thinner than the thickness of the portion.
  • the convex flat plate portion 320 and the thin concave portion 325 are arranged side by side in the thickness direction (P direction) of the rectangular frame 310. That is, as shown in FIG. 6, when the convex flat plate portion 320 is provided on the upper side, the thin concave portion 325 is provided on the lower side, and the thin concave portion 325 is provided on the upper side. In the case where it is present, a convex flat plate portion 320 is provided on the lower side thereof.
  • convex flat plate portions 320 and thin concave portions 325 are alternately arranged in a direction (R direction) surrounding the rectangular frame 310 in a rectangular shape. That is, a thin concave portion 325 is provided next to the convex flat plate portion 320 (in the R direction), and a convex flat plate portion 320 is provided next to the thin concave portion 325.
  • an engaging step portion 327 is disposed between the flat plate portion 320 and the thin concave portion 325 which are adjacent to each other in the direction (R direction) surrounding the rectangular frame 310 in a rectangular shape.
  • the length of the engagement step portion 327 in the R direction is set to a length approximately equal to that when the frame members are stacked.
  • the convex flat plate portion 320 in the lower frame member is fitted along the thin concave portion 325 laminated thereon. Further, a convex flat plate portion 320 stacked above the thin concave portion 325 of the lower frame member is fitted along the thin concave portion 325. As a result, the frame members are positioned and stacked sequentially at appropriate positions upward.
  • the convex flat plate portion 320 is provided with a plurality of position restricting protrusions 323 that pass through the rectangular frame 310 and protrude in the direction (Q direction) from the space outside the rectangular frame 310 toward the space inside the rectangular frame 310. ing.
  • the position restricting protrusion 323 restricts the laminate film exterior material 80 at the periphery of the unit battery 100 and can position the unit battery 100. ing.
  • the convex flat plate portion 320 can position the frame members when the frame members are stacked, and the unit cell 100 is stacked by the position restricting protrusion 323 provided on the convex flat plate portion 320.
  • the unit battery 100 can also be positioned.
  • the second frame member 400 provided with no intermediate plate will be described as a frame member according to the present invention.
  • FIG. 9 is a perspective view of the second frame member 400 according to the embodiment of the present invention.
  • FIG. 10 is a drawing of the second frame member 400 according to the embodiment of the present invention and a perspective view seen from an angle different from FIG.
  • FIG. 10A is a front view of the rectangular frame 410
  • FIG. 10B is a view of the rectangular frame 410 viewed from the first side 411
  • FIG. 10D is a view of the rectangular frame 410 viewed from the third side 413
  • FIG. 10E is a view of the rectangular frame 410 viewed from the fourth side 414.
  • 10 (F) is a rear view of the rectangular frame 410
  • FIG. 10 (G) is a perspective view of the second frame member 400 viewed from an angle different from that in FIG.
  • the definition related to the direction is the same as the definition of the first frame member 300, and thus the description thereof is omitted.
  • the configuration of the second frame member 400 with the same name as that of the first frame member 300 is the same as that of the first frame member 300, and thus the description thereof is omitted.
  • the second frame member 400 is not provided with an intermediate plate. Therefore, the second frame member 400 does not have a member that shields in the thickness direction (P direction) in the rectangular frame 410.
  • the second frame member 400 is different from the first frame member 300 in the configuration of the third side 413 in the rectangular frame 410.
  • an outer inner rectangular through hole 465 that is a rectangular opening penetrating from the outer space of the rectangular frame 410 to the inner space of the rectangular frame 410 is provided. The reason why such outer and inner rectangular through holes 465 can be provided also depends on the necessity of providing an intermediate plate.
  • a lead wire accommodating thin-walled recess 466 is formed which is thinner than other peripheral portions.
  • the unit battery 100 constituting the battery pack 1000 is preferably managed and controlled based on the detected temperature by detecting the temperature with a thermistor (not shown) or the like.
  • the outer / inner rectangular through hole 465 can be suitably used for inserting a lead wire (not shown) from a thermistor (not shown) attached to the unit battery 100. Further, this lead wire (not shown) may be routed to the lead wire accommodating space 452 through the lead wire accommodating thin-walled recess 466.
  • FIG. 11 is a diagram for explaining a manufacturing process of the battery pack 1000 according to the embodiment of the present invention.
  • FIG. 11 is a diagram illustrating the middle of the manufacturing process, and illustrates a state in which the first frame member 300 is stacked on the unit battery 100 that has already been stacked, and the unit battery 100 is further stacked.
  • a double-sided tape 190 (indicated by a dotted line) is attached to the unit battery 100 that has already been laminated, and the first frame member 300 is placed thereon.
  • the middle plate 305 of the first frame member 300 and the laminated unit battery 100 are fixed by the double-sided tape 190.
  • it can replace with such a double-sided tape 190, and can also use an adhesive agent.
  • a double-sided tape 190 is newly affixed to the middle plate 305 of the first frame member 300, and a new unit battery 100 is laminated thereon.
  • extension tab member 125 of the already stacked unit cells 100, the extension tab member 125 of the newly stacked unit cells 100, and the holes 127 are screwed together with a spiral (not shown) to mechanically and Electrical connection is made.
  • the spiral shaft portion (not shown) is accommodated in the spiral shaft housing recess 363 (not shown in FIG. 11) of the first frame member 300.
  • FIG. 12 is a view for explaining the positioning of the unit battery 100 by the first frame member 300 according to the embodiment of the present invention, and is a view of the stacking operation of the unit battery 100 as viewed from directly above.
  • 12A is a view of the first frame member 300 before the unit battery 100 is stacked
  • FIG. 12B is a view illustrating the unit frame 100 after being stacked on the first frame member 300. It is.
  • the convex flat plate portion 320 of the first frame member 300 is provided with a plurality of position restricting protrusions 323 that protrude in the Q direction, and the periphery of the unit battery 100 is formed by these position restricting protrusions 323 as shown in FIG. By being regulated as described above, the unit battery 100 is positioned.
  • the unit cell 100 is positioned by the corner portion of the unit battery 100 being restricted by the corner projection 333.
  • the unit battery 100 can be positioned in the two-dimensional plane viewed in FIG. 12B by the regulation by the position regulation protrusion 323 and the angular projection 333 as described above.
  • the manufacturing process shown in FIG. 13 is executed.
  • the second frame member 400 is further laminated on the first frame member 300.
  • the convex flat plate portion 320 of the lower first frame member 300 is fitted along the thin concave portion 425 of the second frame member 400 laminated thereon.
  • the convex flat plate portion 420 of the second frame member 400 stacked above the thin concave portion 325 of the lower first frame member 300 is fitted along the thin concave portion 325.
  • the second frame member 400 is stacked on the first frame member 300 at an appropriate position.
  • the unit battery 100 is sandwiched between the first frame member 300 and the second frame member 400 by the second frame member 400 stacked on the first frame member 300.
  • FIG. 14 is a view showing a cross section of the unit battery 100 held between the first frame member 300 and the second frame member 400.
  • FIG. 14 schematically shows the X-X ′ cross section in FIG. 13 after the second frame member 400 is laminated.
  • the position of the heat welded portion 81 (sealing region) at the periphery of the unit battery 100 is regulated by the first frame member 300 from below while being regulated by the position regulating projection 323 of the first frame member 300.
  • the state of being sandwiched from above by the second frame member 400 can be understood.
  • FIG. 15 is a diagram illustrating a cover member used in the battery pack 1000 according to the embodiment of the present invention.
  • the first lid member 500 and the second lid member 600 are members that protect the lower and upper portions of the stacked unit cells 100, and the first side plate 700 covers the first side of the unit cells 100.
  • the second side plate 800 is a member that protects the second side of the unit battery 100.
  • the first lid member 500 and the second lid member 600 are provided with a convex flat plate portion and a thin concave portion, so that the lid member and the frame member are laminated seamlessly. Can be done.
  • first lid member 500 since the first lid member 500 and the second lid member 600 have the same configuration, the first lid member 500 will be described as an example of the lid member.
  • the first lid member 500 is provided with a convex flat plate portion 520 and a thin concave portion 525 so as to correspond to the frame member. Furthermore, the engagement step portion 527 is also provided between the adjacent convex flat plate portion 520 and the thin concave portion 525 as in the case of the frame member. Furthermore, a plurality of position restricting protrusions 523 are also provided on the convex flat plate portion 520 so as to protrude in the Q direction.
  • the first lid member 500 is provided with angular convex portions 533 and angular concave portions 535 on both end sides of the second side of the unit battery 100 to be accommodated.
  • the angular convex portion 533 and the angular concave portion 535 are also provided in a dimensional relationship that corresponds to the frame member.
  • one end side of the first lid member 500 (the first side of the unit cell 100 to be accommodated) and the other end side of the first lid member 500 opposite to the one end side (the first unit cell 100 to be accommodated).
  • a fitting recess 548 is provided on the second side.
  • the insertion convex portion 747 of the first side plate 700 and the insertion convex portion 847 of the second side plate 800 are inserted into the insertion concave portion 548 of the first lid member 500.
  • the first side plate 700 is arranged on the first side of the unit battery 100 to be accommodated, the power supply lead 1020 and the lead wire that lead out the power supply lead 1030 that are power supply lines of the unit batteries 100 connected in series are provided.
  • An insertion notch 770 is provided. Such a lead wire insertion notch 770 is not provided in the second side plate 800.
  • a battery pack 1000 as shown in FIG. 16 can be obtained by assembling as shown in FIG. 5 using the frame member, lid member, and side plate as described above.
  • FIG. 16 is a perspective view of the battery pack 1000 according to the embodiment of the present invention.
  • the battery pack 1000 is a tape having an adhesive layer on the outer periphery from the state shown in FIG. 16 in which all members of the first lid member 500, the second lid member 600, the first side plate 700, and the second side plate 800 are attached. To fix the battery pack 1000, or to wind the same tape around the outer periphery with only the first side plate 700 and the second side plate 800 attached before the first lid member 500 and the second lid member 600 are attached.
  • the first frame member 300, the second frame member 400, and the unit battery 100 before the stacked state is fixed or the first lid member 500, the second lid member 600, the first side plate 700, and the second side plate 800 are attached. It is also possible to wind the same tape around the outer periphery of the laminated body. By doing in this way, even if the unit battery 100 expand
  • the convex flat plate portion (320, 420) passes through the rectangular frame (310, 410) while passing through the rectangular frame (310, 410). 410) Since a plurality of position restricting protrusions (323, 423) projecting in the direction from the outer space toward the inner space of the rectangular frame (310, 410) are arranged, the frame member ( 300, 400), the unit battery (100) can be easily positioned, and the workability in manufacturing the battery pack (1000) can be improved.
  • the battery pack (1000) using the frame members (300, 400) according to the present invention is easy to manufacture and highly manufacturable.
  • the present invention relates to a battery pack made of a lithium ion secondary battery which is mounted on an electric motorcycle or an electric vehicle in recent years and whose application is rapidly expanding.
  • a lithium ion secondary battery using a laminate film exterior material has a high degree of freedom in shape and is lightweight, and can be used in various fields.
  • a plurality of such lithium ion secondary batteries are connected in series and assembled into a battery pack.
  • the convex flat plate portion is provided with a plurality of position restricting protrusions that protrude in the direction from the outer space of the rectangular frame toward the space of the rectangular frame while passing through the rectangular frame. Therefore, according to such a frame member according to the present invention, the positioning of the unit battery can be easily performed, the workability at the time of manufacturing the battery pack can be improved, and the industrial utility is very high. Big.
  • Laminate film exterior material 81 ... Thermal welded part (sealing region) 100 ... Unit battery 110 ... Battery body 111 ... First side 112 ... Second side 113 ... Third side 114 ... Fourth side 120 ... Positive electrode pull-out tab 125 ..Additional tab member 127... Hole 130 .. negative electrode extraction tab 190... Double-sided tape 300. 305 ... Middle plate 310 ... Rectangular frame 311 ... First side 312 ... Second side 313 ... Third side 314 ... Fourth side 320 ... Convex flat plate portion 323 ... Position restriction protrusion 325 ... Thin concave part 327 ... Engagement step part 333 ... Angular convex part 335 ...
  • Angular concave part 340 ... Tab placement part 343 ... Tab side convexity 344... Tab side recess 352... Lead wire receiving space 363...
  • Second frame member (no intermediate plate) 410 ... rectangular frame 411 ... first side 412 ... second side 413 ... third side 414 ... fourth side 420 ... convex flat plate portion 423 ... position regulation protrusion Part 425 ... Thin concave part 427 ... Engagement step part 433 ... Square convex part 435 ... Square concave part 440 ... Tab placement part 443 ... Tab side convex part 444 ... Tab Side recess 452 ... Lead wire receiving space 463 ...
  • First lid member 520 ... Convex shape Flat plate portion 523 ... Position regulating protrusion 525 ... Thin concave portion 527 ... Engagement step portion 533 ... Square convex portion 535 ... Square concave portion 548 ... Insertion concave portion 600 ... Second Lid member 620... Convex flat plate portion 623... Position restricting protrusion 625.
  • engaging step 633 ... angular convex part 635 ... angular concave part 648 ... fitting concave part 700 ... first side plate 747 ... fitting convex part 770 ... lead wire insertion notch 800 ... Second side plate 847 ... Insertion convex part 1000 ... Battery pack 1020 ... Power supply lead wire 1030 ... Power supply lead wire

Landscapes

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

Abstract

La présente invention concerne un élément de cadre permettant de positionner simplement une batterie unitaire, et d'améliorer l'efficacité de travail pendant la production d'un bloc-batterie. À cet effet, cet élément de cadre 300 est caractérisé en ce qu'il comprend : un corps de cadre rectangulaire 310 ; des parties de plaque plates saillantes 320 s'étendant depuis la surface latérale périphérique extérieure du corps de cadre rectangulaire 310 dans la direction de l'épaisseur du corps de cadre rectangulaire 310 ; et des parties évidées à paroi mince 325 ayant une paroi plus mince que l'épaisseur de paroi à des positions ayant la surface latérale périphérique extérieure du corps de cadre rectangulaire 310 lorsqu'elles sont visualisées dans une direction faisant face à l'espace interne du corps de cadre rectangulaire 310 depuis l'espace externe du corps de cadre 310 tout en traversant l'intérieur du corps de cadre rectangulaire 310. Les parties de plaque saillantes 320 et les parties évidées à paroi mince 325 sont alignées dans la direction de l'épaisseur du corps de cadre rectangulaire 310. Une pluralité de saillies de restriction de position 323 sont disposées sur la partie de plaque plate saillante 320, chacune des saillies de restriction de position faisant saillie dans une direction faisant face à l'espace interne du corps de cadre rectangulaire 310 depuis l'espace externe du corps de cadre 310 tout en traversant l'intérieur du corps de cadre rectangulaire 310.
PCT/JP2017/015823 2016-06-21 2017-04-20 Élément de cadre et bloc-batterie utilisant l'élément de cadre WO2017221536A1 (fr)

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JP2016-122272 2016-06-21

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CN112582747A (zh) * 2019-09-30 2021-03-30 株式会社牧田 电池组
US20210184302A1 (en) * 2019-09-29 2021-06-17 Ningde Amperex Technology Limited Cell frame set and energy storage device package including cell frame set
CN113169396A (zh) * 2018-11-26 2021-07-23 京瓷株式会社 电化学电池
JP2022516792A (ja) * 2019-01-09 2022-03-02 ビーワイディー カンパニー リミテッド 電池パック、車両及びエネルギー蓄積装置
JP2022519394A (ja) * 2019-09-29 2022-03-24 東莞新能源科技有限公司 コアブラケットセット及び前記コアブラケットセットを含むエネルギー貯蔵装置パッケージ材
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CN112582747A (zh) * 2019-09-30 2021-03-30 株式会社牧田 电池组
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JP7492986B2 (ja) 2022-03-22 2024-05-30 本田技研工業株式会社 バッテリパック

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