WO2018070373A1 - 組電池 - Google Patents

組電池 Download PDF

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Publication number
WO2018070373A1
WO2018070373A1 PCT/JP2017/036644 JP2017036644W WO2018070373A1 WO 2018070373 A1 WO2018070373 A1 WO 2018070373A1 JP 2017036644 W JP2017036644 W JP 2017036644W WO 2018070373 A1 WO2018070373 A1 WO 2018070373A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
housing
battery
rib
cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2017/036644
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
季之 本橋
由和 高松
貴之 平瀬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Corp
Original Assignee
Calsonic Kansei Corp
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 Calsonic Kansei Corp filed Critical Calsonic Kansei Corp
Priority to US16/341,229 priority Critical patent/US20190259995A1/en
Publication of WO2018070373A1 publication Critical patent/WO2018070373A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • 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
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted 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
    • H01M50/20—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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 assembled battery.
  • Patent Document 1 discloses an assembled battery in which a battery cell is accommodated in a housing hole of a block, and the battery cell is bonded to an inner wall of the housing hole with an adhesive.
  • the battery cell described in Patent Document 1 includes a battery main body and a halon tube as an exterior film that covers the periphery of the battery main body.
  • the battery cell in an assembled battery having a plurality of battery cells, it is required to ensure insulation between the plurality of battery cells in order to suppress a short circuit between the battery cells.
  • the battery cell may be configured to be covered with an exterior film.
  • the inventor of the present application has conceived a configuration in which an insulating sheet is interposed between battery cells in place of such an exterior film or in addition to the above-described exterior film in order to further improve the insulation properties. If the insulating sheet is not fixed, the insulating sheet moves between battery cells due to, for example, traveling vibration of an automobile on which the assembled battery is mounted, and noise is generated. As a result of recognizing that the problem may occur, and as a result of intensive studies, an assembled battery capable of easily fixing the position of the insulating sheet between the plurality of battery cells has been created.
  • An object of the present invention is to provide an assembled battery that can easily fix the position of an insulating sheet between a plurality of battery cells.
  • the assembled battery as the first aspect of the present invention includes a plurality of battery cells, a plurality of first accommodation spaces that accommodate one end side of each battery cell, and a plurality of second accommodation spaces that accommodate the other end side.
  • a housing that holds the plurality of battery cells, an adhesive portion that contacts both the battery cells and the housing, and bonds the battery cells to the housing, and is disposed between the plurality of battery cells.
  • the housing includes a first frame that defines the plurality of first accommodation spaces, and a second frame that defines the plurality of second accommodation spaces, and the insulation sheet Is interposed between the first frame body and the second frame body and is in contact with the adhesive portion.
  • FIG. 7A is an external perspective view from the upper surface side of the single cell holder shown in FIG. 1
  • FIG. 7B is an external perspective view from the lower surface side of the single cell holder shown in FIG.
  • FIG. 1 is an exploded perspective view of an assembled battery 100 as an embodiment of the present invention.
  • the assembled battery 100 includes a battery module 2, an auxiliary machine module 3, and an upper case 300.
  • the assembled battery 100 is formed by fixing the upper case 300 after assembling the battery module 2 and the auxiliary machine module 3.
  • FIG. 2 is an external perspective view showing an external appearance of the assembled battery 100 assembled. However, FIG. 2 shows a state in which the upper case 300 is removed for convenience of explanation.
  • the side where the battery module 2 and the auxiliary module 3 are located with respect to the upper case 300 of FIG. The side where is located is described as the “upper” side.
  • FIG. 3 is a functional block diagram showing an outline of a power supply system 400 including the assembled battery 100 shown in FIGS. 1 and 2.
  • the assembled battery 100 will be described as being used by being mounted on a vehicle such as a vehicle including an internal combustion engine or a hybrid vehicle capable of traveling with the power of both the internal combustion engine and the electric motor.
  • the use of the assembled battery 100 is not limited to the vehicle described below.
  • the power supply system 400 includes an assembled battery 100, an alternator 410, a starter 420, a second secondary battery 430, a load 440, a switch 450, and a control unit 460.
  • the assembled battery 100 includes a first secondary battery 130 housed in the battery module 2.
  • the first secondary battery 130, the alternator 410, the starter 420, the second secondary battery 430, and the load 440 are connected in parallel.
  • the assembled battery 100 includes a MOSFET (metal oxide semiconductor field effect device transistor) 210, a relay 220, a current sensor 230, a fusible link 240, a first secondary battery 130, and a battery controller (LBC) 140. .
  • Relay 220, current sensor 230, fusible link 240, and first secondary battery 130 are connected in series in this order.
  • MOSFET 210 is connected in series to second secondary battery 430 and load 440.
  • the SSG terminal 250 is connected to the alternator 410 and the LOAD terminal 260 is connected to the load 440.
  • the GND terminal 270 is used for grounding.
  • the relay 220 functions as a switch that connects or disconnects the first secondary battery 130 in parallel with each component outside the assembled battery 100 in the power supply system 400.
  • the current sensor 230 has an appropriate structure and measures the current flowing through the circuit including the first secondary battery 130 by an appropriate method.
  • the fusible link 240 includes a fuse body, a fuse housing made of insulating resin that accommodates and holds the fuse body, and a cover made of insulating resin that covers the news housing, and melts when an overcurrent occurs.
  • the first secondary battery 130 is configured by an assembly of battery cells 150 housed in the battery module 2 as shown in FIG.
  • Each battery cell 150 constituting the first secondary battery 130 is a secondary battery such as a lithium ion battery or a nickel metal hydride battery.
  • the first secondary battery 130 has a positive electrode side connected to the fusible link 240 and a negative electrode side grounded via a GND terminal 270.
  • a housing 4 described later of the battery module 2 is drawn in a transparent state for convenience of explanation.
  • the MOSFET 210 functions as a switch that connects or disconnects the second secondary battery 430 and the load 440 in parallel with other components in the power supply system 400.
  • the LBC 140 is connected to the first secondary battery 130 and estimates the state of the first secondary battery 130. For example, the LBC 140 estimates a state of charge (SOC) of the first secondary battery 130 and the like.
  • SOC state of charge
  • the alternator 410 is a generator and is mechanically connected to the vehicle engine. Alternator 410 generates power by driving the engine. The power generated by the alternator 410 by driving the engine can be supplied to the first secondary battery 130, the second secondary battery 430, and the load 440 included in the assembled battery 100 by adjusting the output voltage with a regulator. The alternator 410 can generate power by regeneration when the vehicle is decelerated. The electric power regenerated by the alternator 410 is used to charge the first secondary battery 130 and the second secondary battery 430.
  • the starter 420 is configured to include a cell motor, for example, and receives power supply from at least one of the first secondary battery 130 and the second secondary battery 430 to start the engine of the vehicle.
  • the second secondary battery 430 is composed of, for example, a lead storage battery and supplies power to the load 440.
  • the load 440 includes, for example, an audio, an air conditioner, and a navigation system provided in the vehicle, and operates by consuming the supplied power.
  • the load 440 operates by receiving power supply from the first secondary battery 130 while the engine driving is stopped, and operates by receiving power supply from the alternator 410 and the second secondary battery 430 while driving the engine.
  • the switch 450 is connected in series with the starter 420.
  • the switch 450 connects or disconnects the starter 420 in parallel with other components.
  • the control unit 460 controls the overall operation of the power supply system 400.
  • the control unit 460 is configured by, for example, an ECU (Electronic Control Unit or Engine Control Unit) of the vehicle.
  • the control unit 460 controls the operation of the switch 450, the MOSFET 210, and the relay 220, respectively, and supplies power by the alternator 410, the first secondary battery 130, and the second secondary battery 430, and the first secondary battery 130.
  • the second secondary battery 430 is charged.
  • the MOSFET 210, the relay 220, the current sensor 230, the fusible link 240, the SSG terminal 250, the LOAD terminal 260, and the GND terminal 270 described above are assembled in the auxiliary machine module 3. Further, in the assembled battery 100 of the present embodiment, the three terminals, the SSG terminal 250, the LOAD terminal 260, and the GND terminal 270 described above, protrude to the outside of the upper case 300 when the upper case 300 is attached.
  • the battery module 2 includes a plurality of battery cells 150, a housing 4 that houses the plurality of battery cells 150, and an inter-cell bus bar 160 that electrically connects the battery cells 150.
  • the battery cell 150 has a substantially rectangular parallelepiped shape.
  • the assembled battery 100 according to this embodiment includes a plurality of battery cells 150. Specifically, five battery cells 150 are accommodated in the assembled battery 100 of the present embodiment. However, the number of battery cells 150 that can be accommodated in the assembled battery 100 is not limited to the five shown in the present embodiment, but depends on the maximum output of the battery cells 150 and the power consumed by the driven device such as a vehicle. Can be determined as appropriate.
  • FIG. 4 is a perspective view showing five battery cells 150 extracted from the present embodiment in a state of being accommodated in the housing 4.
  • the five battery cells of the present embodiment are accommodated in the housing 4 in the state shown in FIG.
  • each battery cell 150 has a positive electrode terminal 152 and a negative electrode terminal 153 on one cap surface 151 having a substantially rectangular parallelepiped shape.
  • the cap surface 151 has a rectangular shape having a long side and a short side, and the positive electrode terminal 152 and the negative electrode terminal 153 are provided near both ends of the cap surface 151 in the long side direction.
  • a safety valve that is opened at the center of the cap surface 151 to discharge gas to the outside when gas is generated inside the battery cell 150 due to aging, thermal runaway, or the like and the pressure inside the battery cell 150 exceeds a predetermined value. 154 is provided.
  • the plurality of battery cells 150 are arranged in the housing 4 such that the arrangement of the positive electrode terminal 152 and the negative electrode terminal 153 of the battery cells 150 adjacent to each other is opposite.
  • the surfaces other than the cap surface 151 of the battery cell 150 are formed by a uniform plane.
  • the lower surface 7 opposite to the cap surface 151 of the battery cell 150 and the four side surfaces 8 other than the cap surface 151 and the lower surface 7 of the battery cell 150 are formed by a uniform plane.
  • FIG. 5 is an external perspective view of the lower case 110 of the housing 4, and FIG. 6 is a top view of the lower case 110 of the housing 4.
  • FIG. 7 is an external perspective view of the cell holder 120 of the housing 4. Specifically, FIG. 7A is an external perspective view from the upper surface side of the cell holder 120, and FIG. 7B is from the opposite side (hereinafter also referred to as “lower surface side”) of the cell holder 120.
  • FIG. The housing 4 includes a plurality of first accommodation spaces 15 that accommodate one end side of each battery cell 150 and a plurality of second accommodation spaces 16 that accommodate the other end side of each battery cell 150. Is held in a state of being accommodated in the plurality of first accommodation spaces 15 and the plurality of second accommodation spaces 16.
  • the housing 4 of the present embodiment includes a lower case 110 that houses the lower side as one end side of the battery cell 150, and a cell holder 120 that houses the upper side as the other end side of the battery cell 150. Yes.
  • the plurality of first accommodation spaces 15 are provided in the lower case 110, and the plurality of second accommodation spaces 16 are provided in the cell holder 120.
  • the lower case 110 is a rectangular box-shaped housing having a space 110 a that can accommodate the battery cells 150 from above. That is, the lower case 110 has a bottom wall 111 and four side walls 112a, 112b, 112c, and 112d, and has an opening 113 on the opposite side (that is, the upper side) of the bottom wall 111.
  • the side walls 112a and 112c face each other, and the side walls 112b and 112d face each other.
  • the side walls 112a, 112b, 112c and 112d are collectively referred to as the side walls 112.
  • the height of the side wall 112 is lower than the height of the battery cell 150 accommodated in the lower case 110. Therefore, the battery cell 150 is accommodated in the lower case 110 so that the cap surface 151 (see FIG. 4) protrudes from the opening 113, that is, on the upper surface side.
  • the side walls 112b and 112d include an attachment mechanism 114 for attaching the assembled battery 100 to the vehicle on the outer surface of the lower case 110 (that is, the side opposite to the space 110a).
  • the attachment mechanism 114 is appropriately determined in shape and position on the side walls 112b and 112d according to the attachment method with the vehicle.
  • each side wall 112 has an engagement hole 115 for engagement with the cell holder 120 on the opening 113 side.
  • each side wall 112 has three engagement holes 115 in the center on the opening 113 side and in the vicinity of both ends.
  • a rib 116 is provided as a first frame that protrudes upward and extends in a direction perpendicular to the vertical direction. ing.
  • the rib 116 as the first frame body indicates the position of the battery cell 150 to be accommodated and prevents displacement of the battery cell 150 to be accommodated.
  • the ribs 116 are also spacers that maintain a space between the battery cells 150. Note that an insulating sheet 6 described later is disposed in a space between adjacent battery cells 150 formed by the ribs 116.
  • the height of the rib 116 as the first frame is lower than the height of the side wall 112.
  • four ribs 116 are provided at equal intervals in parallel to the side walls 112b and 112d. That is, in the present embodiment, the lower case 110 has five first accommodation spaces 15 partitioned by the side walls 112b, 112d, and ribs 116, and the lower end of each battery cell 150 is It is accommodated in the first accommodating space 15. Therefore, the five battery cells 150 of the present embodiment are arranged so as to be stacked from the side wall 112b to the side wall 112d. In other words, the five first accommodation spaces 15 of the present embodiment are formed in the vicinity of the bottom wall 111 in the lower case 110.
  • the position and size of the rib 116 are appropriately determined according to the shape and quantity of the battery cell 150 accommodated in the lower case 110, the position and size of the present embodiment are not limited.
  • the first frame body of the present embodiment protrudes upward from the upper surface of the bottom wall 111 of the lower case 110 and extends in a direction perpendicular to the vertical direction (in the present embodiment, the opposing direction of the side walls 112a and 112c).
  • it is configured by existing ribs 116, it may be a first frame body that divides a plurality of first accommodation spaces 15 that accommodate one end side of each battery cell 150, and has the shape of the ribs 116 shown in the present embodiment. It is not limited.
  • the first frame is configured so as not to be continuous with the bottom wall 111 and spanned between the opposing side walls 112. It is good.
  • the cell holder 120 is attached to the cap surface 151 side of the battery cell 150, that is, the opening 113 side of the lower case 110.
  • the cell holder 120 has a substantially rectangular shape when viewed from above, an outer peripheral frame 121 having a predetermined height, and a battery cell with the cell holder 120 engaged with the lower case 110 inside the outer peripheral frame 121. And a holding lid 122 that covers and holds 150 from the upper surface side.
  • the outer peripheral frame 121 has four side walls 121a, 121b, 121c and 121d.
  • the four side walls 121a, 121b, 121c and 121d are arranged at positions corresponding to the four side walls 112a, 112b, 112c and 112d of the lower case 110, respectively, in a state where the outer peripheral frame 121 and the lower case 110 are engaged.
  • the outer peripheral frame 121 includes screw hole forming portions 123 having screw holes 123a for fixing the accessory module 3 to the cell holder 120 by screwing at the end portions of the side walls 121b and 121d.
  • the outer peripheral frame 121 is formed so as to protrude outward from the side walls 121b and 121d.
  • the screw hole 123a is formed so that a screw can be inserted from the upper surface side.
  • the outer peripheral frame 121 has a bus bar of the auxiliary module 3, more specifically, a total plus copper bus bar 286 and a total minus copper bus bar 285 (see FIG. 2), which will be described later, on the upper end side of the side walls 121b and 121d.
  • a screw hole 123b for screwing is preferably provided in the vicinity of an opening 124a to which a total plus terminal bus bar 165 and a total minus terminal bus bar 164 described later are attached.
  • the outer peripheral frame 121 has an engagement insertion portion 121e having a predetermined height over the entire circumference.
  • the engagement insertion portion 121e is thinner than other portions of the outer peripheral frame 121. Therefore, on the outer surface of the outer peripheral frame 121, the engagement insertion portion 121 e is recessed from other portions of the outer peripheral frame 121.
  • the engagement insertion portion 121e is inserted into the space 110a in the lower case 110 from the opening 113 of the lower case 110 when the cell holder 120 is engaged with the lower case 110.
  • the engagement insertion portion 121e includes three engagement claws 128 in the center and in the vicinity of both ends.
  • the engagement claw 128 is provided at a position corresponding to the engagement hole 115 of the lower case 110.
  • the engagement claw 128 of the cell holder 120 is fitted into the engagement hole 115 of the lower case 110 to be engaged, whereby the cell holder 120 and the lower case 110 are engaged.
  • the positions and quantities of the engagement holes 115 and the engagement claws 128 are not limited to the examples shown in the present embodiment, and can be determined as appropriate positions and quantities.
  • the outer peripheral frame 121 is provided with an engagement hole 129a on the upper end side of the side walls 121a and 121c and in the vicinity of the screw hole 123b.
  • the engagement hole 129a is provided so as to protrude outward from the outer peripheral frame 121, and is a substantially rectangular hole in a top view.
  • the engagement hole 129a is used when the cell holder 120 and the accessory module 3 are assembled.
  • the outer peripheral frame 121 includes an engagement hole 129b on the upper end side near the center of each of the side walls 121a, 121b, 121c and 121d.
  • the engagement hole 129b is provided so as to protrude outward from the outer peripheral frame 121, and is a substantially rectangular hole in a top view.
  • the engagement hole 129b is used when the cell holder 120 and the upper case 300 (see FIG. 1) are assembled.
  • the engagement hole 129b is not necessarily provided near the center of each of the side walls 121a, 121b, 121c, and 121d, and may be provided at any position as long as the engagement hole 129b can be engaged with the upper case 300. it can.
  • the holding lid 122 holds the battery cell 150 accommodated in the lower case 110 from above.
  • the holding lid 122 has an opening 124 a at a position corresponding to the positive electrode terminal 152 and the negative electrode terminal 153 of the battery cell 150 when the cell holder 120 and the lower case 110 are engaged. Therefore, in the engaged state between the cell holder 120 and the lower case 110, the positive terminal 152 and the negative terminal 153 of the battery cell 150 are exposed to the upper surface side of the holding lid 122 from the opening 124a.
  • the holding lid 122 has an opening 124b at a position corresponding to the safety valve 154 of the battery cell 150 when the cell holder 120 and the lower case 110 are engaged. Therefore, in the engaged state between the cell holder 120 and the lower case 110, the gas discharged from the safety valve 154 is discharged from the opening 124b to the outside of the battery cell 150.
  • the positive electrode terminal 152 and the negative electrode terminal 153 that are exposed from the opening 124 a and are aligned in a row are adjacent to each other except for the positive electrode terminal 152 connected to the fusible link 240 and the negative electrode terminal 153 connected to the GND terminal 270. Are electrically connected by the inter-cell bus bar 160.
  • the holding lid 122 prevents electrical connection between the bus bars between the inter-cell bus bars 160 attached to the cell holder 120 and between the inter-cell bus bar 160 and the total plus terminal bus bar 165 or the total minus terminal bus bar 164. And a bead 125 for positioning the bus bar. The bead 125 projects to the upper surface side of the holding lid 122.
  • the holding lid 122 includes a screw hole forming portion 126 for fixing the LBC 140 on the upper surface side.
  • the screw hole forming portion 126 is formed between the opening 124 a and the opening 124 b on the upper surface side of the holding lid 122. That is, in the present embodiment, the holding lid 122 includes ten screw hole forming portions 126.
  • the screw hole forming portion 126 has a substantially cylindrical shape, and a screw hole 126a is provided at the center.
  • the LBC 140 is placed on the upper surface side of the cell holder 120 and is screwed to the cell holder 120 from the upper surface side using the screw holes 126a formed in the screw hole forming portion 126.
  • the lower surface of the holding lid 122 that is the surface facing the battery cell 150 of the holding lid 122 of the cell holder 120 protrudes downward and serves as a second frame that extends in a direction perpendicular to the vertical direction.
  • Ribs 127 are provided.
  • the ribs 127 as the second frame prevent displacement of the accommodated battery cells 150.
  • the rib 127 is also a spacer that maintains a space between the battery cells 150.
  • the height of the rib 127 as the second frame body from the lower surface of the holding lid 122 is lower than the height of the portion of the outer peripheral frame 121 protruding from the lower surface of the holding lid 122.
  • four ribs 127 are provided in parallel with the side walls 121b and 121d at equal intervals. That is, in the present embodiment, the cell holder 120 has five second accommodation spaces 16 that are partitioned by the side wall 121b, the side wall 121d, and the rib 127, and the upper end of each battery cell 150 has a second end. It is accommodated in the accommodating space 16.
  • the five battery cells 150 of the present embodiment are arranged so as to be stacked from the side wall 121b to the side wall 121d.
  • the five second accommodation spaces 16 of the present embodiment are formed near the lower surface of the holding lid 122 of the cell holder 120.
  • the rib 127 as the second frame of the cell holder 120 is provided in a direction and position corresponding to the rib 116 as the first frame of the lower case 110 in a state where the cell holder 120 and the lower case 110 are engaged. It is done. More specifically, in a state where the cell holder 120 and the lower case 110 are engaged, the upper end portion of each battery cell 150 is housed in the second housing space 16, and the lower end portion of each battery cell 150. Is housed in the first housing space 15. And the rib 116 as a 1st frame and the rib 127 as a 2nd frame oppose in the up-down direction in the position between the adjacent battery cells 150. FIG. Therefore, the space between the adjacent battery cells 150 formed by the ribs 116 described above is the same as the space between the adjacent battery cells 150 formed by the ribs 127, and this space includes the insulating sheet 6 described later. Is placed.
  • FIG. 8 is an enlarged external perspective view of the inter-cell bus bar 160 attached to the cell holder 120.
  • the inter-cell bus bar 160 is made of a conductive metal such as aluminum.
  • the inter-cell bus bar 160 is attached to the cell holder 120, and is connected between the opening 124a (see FIG. 7) in a state of being connected to the positive terminal 152 (see FIG. 4) and the negative terminal 153 (see FIG. 4) of the battery cell 150.
  • the holding lid 122 has a projection 161 for avoiding interference with the frame portion 122a (see FIG. 7).
  • the inter-cell bus bar 160 protrudes from the terminal connection part 162 connecting the two terminal connection parts 162 and the two terminal connection parts 162 connected to the positive electrode terminal 152 and the negative electrode terminal 153 to the upper surface side in a side view. And a convex portion 161.
  • the terminal connecting portion 162 has a welding opening 162a at the center, for example, as shown in FIG.
  • the inter-cell bus bar 160 and the later-described total plus terminal bus bar 165 and total minus terminal bus bar 164 are connected to each terminal of the battery cell 150 by bead welding at the periphery of the welding opening 162a.
  • each terminal connection portion 162 has a voltage sensor attachment terminal 163 that protrudes toward the opening 124b (see FIG. 7) when attached to the cell holder 120.
  • Each voltage sensor attachment terminal 163 has a screw hole 163a.
  • each voltage sensor mounting terminal 163 forms a screw hole when the terminal connection portion 162 of the inter-cell bus bar 160 is connected to the positive terminal 152 (see FIG. 4) or the negative terminal 153 (see FIG. 4). It is formed so as to be disposed on the portion 126 (see FIG. 7).
  • the screw hole 163a overlaps with the screw hole 126a (see FIG.
  • the voltage sensor attachment terminal 163 is connected to the voltage sensor and used to detect a voltage between the terminals.
  • the total plus terminal bus bar 165 (see FIG. 1) is connected to the positive terminal 152 (see FIG. 4) connected to the fusible link 240 (see FIGS. 1 and 2).
  • the total negative terminal bus bar 164 (see FIG. 1) is connected to the negative terminal 153 (see FIG. 4) connected to the GND terminal 270 (see FIGS. 1 and 2).
  • the total positive terminal bus bar 165 and the total negative terminal bus bar 164 are made of a conductive metal such as aluminum, for example.
  • Each of the total positive terminal bus bar 165 and the total negative terminal bus bar 164 has one terminal connection 162 connected to the positive terminal 152 or the negative terminal 153 of the battery cell 150 (see FIG. 8.
  • the bus bar shown in FIG. 8 is the inter-cell bus bar 160. Therefore, two terminal connection parts 162 are drawn.) And connected to the total plus copper bus bar 286 or the total minus copper bus bar 285 (see FIG. 2) attached to the auxiliary machine base 200 of the auxiliary machine module 3.
  • An external connection portion 166 (see FIG. 1).
  • the external connection portion 166 and the terminal connection portion 162 of the present embodiment protrude above the terminal connection portion 162 and have a U-shaped connecting portion that sandwiches the outer peripheral frame 121 (see FIG. 7) of the cell holder 120 from the upper end side. It is integrally formed via Therefore, the external connection portion 166 is located outside the outer peripheral frame 121.
  • the external connection portion 166 is attached along a bus bar support portion 123 c formed from the inner surface to the outer surface of the outer peripheral frame 121.
  • the external connection part 166 (refer FIG. 1) has the insertion hole 166a (refer FIG. 1) in the position corresponding to the screw hole 123b (refer FIG.
  • terminal connection portions 162 of the total plus terminal bus bar 165 and the total minus terminal bus bar 164 also have voltage sensor mounting terminals 163 (see FIG. 8) protruding toward the opening 124b (see FIG. 7) in the state where they are attached to the cell holder 120. Have.
  • the adhesion part 5 contacts both the battery cells 150 and the housing 4, and bonds the battery cells 150 to the housing 4.
  • the adhesion part 5 of this embodiment is comprised by the adhesive agent interposed between each battery cell 150 and the housing 4.
  • the adhesive as the bonding portion 5 can be any adhesive that can bond the battery cell 150 and the housing 4, and for example, an epoxy-based adhesive can be used.
  • FIG. 9 is a view showing a bonding position between the battery cell 150 and the housing 4.
  • FIG. 9 shows a longitudinal section at the center position in the longitudinal direction of the cap surface 151 of the battery cell 150.
  • each battery cell 150 of the present embodiment is housed in a first housing space 15 formed in the lower case 110 of the housing 4 at the lower portion, and the cell holder 120 of the housing 4 in the upper portion. In the state accommodated in the formed second accommodation space 16, it is adhered to the lower case 110 and the cell holder 120 by the adhesion part 5.
  • each battery cell 150 of the present embodiment is bonded to the lower case 110 by an adhesive portion 5 interposed between each battery cell 150 and the lower case 110.
  • each battery cell 150 is bonded to the cell holder 120 by an adhesive portion 5 interposed between each battery cell 150 and the cell holder 120.
  • the adhesive as the adhesive portion 5 does not necessarily need to be in contact with the entire battery cell 150.
  • the adhesive as the adhesive portion 5 of the present embodiment includes the cap surface 151 of each battery cell 150, the lower surface 7 opposite to the cap surface 151 of each battery cell 150, the lower end portion of the side surface 8 of each battery cell 150, and It is in contact with the upper end.
  • first bonding portions 5 a the bonding portions that contact the cap surface 151 of the battery cell 150 (hereinafter referred to as “first bonding portions 5 a”) are the positive terminal 152 and the negative electrode.
  • the cap surface 151 is bonded to the lower surface of the holding lid 122 by contacting only the peripheral portion of the cap surface 151 so as not to contact the terminal 153 and the safety valve 154 and being interposed between the lower surface of the holding lid 122 of the cell holder 120. is doing.
  • the bonding portion that contacts the lower surface 7 of the battery cell 150 (hereinafter referred to as “second bonding portion 5 b”) is in contact with at least a part of the lower surface 7, and the lower case.
  • the lower surface 7 is bonded to the upper surface of the bottom wall 111 by being interposed between the upper surface of the bottom wall 111 of 110.
  • an adhesive portion that contacts the upper end portion of the side surface 8 of the battery cell 150 (hereinafter referred to as “third adhesive portion 5 c”) is a rib 127 as the second frame of the cell holder 120.
  • the upper end portion of the side surface 8 is bonded to the side surface of the rib 127 by being interposed between the side surfaces of the ribs 127.
  • an adhesive part (hereinafter referred to as “fourth adhesive part 5 d”) that contacts the lower end part of the side surface 8 of the battery cell 150 in the adhesive part 5 is used as a first frame of the lower case 110.
  • fourth adhesive part 5 d an adhesive part that contacts the lower end part of the side surface 8 of the battery cell 150 in the adhesive part 5 is used as a first frame of the lower case 110.
  • the first bonding portion 5 a and the third bonding portion 5 c are holder bonding portions that bond the battery cell 150 to the cell holder 120.
  • the second bonding portion 5 b and the fourth bonding portion 5 d are case bonding portions that bond the battery cell 150 to the lower case 110.
  • the position of the adhesive as the bonding portion 5 is not limited as long as it is provided at a position where each battery cell 150 can be bonded and fixed to the housing 4 and an insulating sheet 6 described later can be bonded and fixed.
  • the position is not limited to the position of the embodiment.
  • first adhesive part 5a and the third adhesive part 5c as the holder adhesive part of the present embodiment are connected to each other without being separated from each other, and form an integral adhesive region, but are separated from each other. You may arrange.
  • second adhesive portion 5b and the fourth adhesive portion 5d as the case adhesive portion of the present embodiment are connected without being separated from each other, and form an integrated adhesive region, but are separated from each other. You may arrange in.
  • an adhesive as the second adhesive portion 5b is applied between the battery cell 150 and the bottom surface of the lower case 110 (in this embodiment, the upper surface of the bottom wall 111).
  • another filler may be interposed.
  • the filler those having elasticity are particularly preferable.
  • the insulating sheet 6 is disposed between the plurality of battery cells 150 as shown in FIG. In the present embodiment, the insulating sheet 6 is disposed in each of the four gaps formed between the five battery cells 150. The insulating sheet 6 can suppress a short circuit between the battery cells 150.
  • the insulating sheet 6 can be formed of a resin material such as polyethylene or polypropylene, for example.
  • the insulating sheet 6 is interposed between the rib 116 as the first frame and the rib 127 as the second frame, and is in contact with the above-described bonding portion 5. Therefore, the position of the insulating sheet 6 is fixed between the rib 116 and the rib 127 by an adhesive as the bonding portion 5. Thereby, it can suppress that the insulating sheet 6 moves between the battery cells 150 by the driving
  • the third adhesive portion 5c of the present embodiment extends to the lower side of the lower end of the rib 127 as the second frame body, and is positioned below the lower end of the rib 127 at the position of the insulating sheet 6. The upper end is in contact with the third adhesive portion 5c.
  • the fourth adhesive portion 5d of the present embodiment extends to the upper side of the upper end of the rib 116 as the first frame body, and the lower end portion of the insulating sheet 6 is the fourth position above the upper end of the rib 116. It is in contact with the bonding part 5d.
  • the position of the insulating sheet 6 according to the present embodiment is fixed in a state where the insulating sheet 6 is in contact with both the third adhesive portion 5c that is the holder adhesive portion and the fourth adhesive portion 5d that is the case adhesive portion.
  • the configuration is not limited to this configuration, and for example, a configuration may be adopted in which the position is fixed by contacting only one of the holder bonding portion and the case bonding portion.
  • FIG. 10 is a diagram illustrating an outline of the assembly process of the battery module 2 in order.
  • FIG. 10A shows a step of applying an adhesive (denoted by reference numeral “5” in FIG. 10A) to the lower case 110 and the cell holder 120 to be the adhesive portion 5.
  • an adhesive denoted by reference numeral “5” in FIG. 10A
  • the lower case 110 and the fourth adhesive portion 5a to the fourth adhesive portion 5d are formed.
  • An adhesive is applied to a predetermined position of the cell holder 120.
  • the adhesive is applied to substantially the entire region of the upper surface of the bottom wall 111 of the lower case 110 in the central region in the extending direction of the ribs 116 and where the ribs 116 are not formed.
  • the second adhesive portion 5b and the fourth adhesive portion 5d see FIG.
  • the position where the adhesive is applied is not limited to that shown in FIG. 10A.
  • the adhesive is applied to the end regions on both sides in the extending direction of the rib 116 and the rib 127. May be.
  • the adhesive applied to the lower case 110 and the cell holder 120 may be both the central region and the end region in the extending direction of the rib 116 and the rib 127.
  • the adhesive is prevented from coming into contact with the positive terminal 152, the negative terminal 153, and the safety valve 154 (see FIG. 4) on the cap surface 151.
  • the application position of the adhesive in the extending direction of the rib 116 and the rib 127 may be different between the lower case 110 and the cell holder 120.
  • an adhesive is applied to the lower case 110 and the cell holder 120, but it is also possible to apply an adhesive to the battery cell 150 side.
  • FIG. 10B shows a process of setting the battery cell 150 in the cell holder 120.
  • the cap surface 151 of the battery cell 150 is directed downward, and the battery cell 150 according to the rib 127 is placed on the lower surface side of the holding lid 122 of the cell holder 120 (upper side in the state of FIG. (See the white arrow in FIG. 10B).
  • the end of the battery cell 150 on the cap surface 151 side is accommodated in the second accommodation space 16 partitioned by the rib 127.
  • the 1st adhesion part 5a and 3rd adhesion part 5c (refer to Drawing 9) which adhere battery cell 150 and cell holder 120 are formed.
  • the adhesive applied in the step shown in FIG. 10A serving as the third adhesive portion 5c is fitted to the second accommodation space 16 of the cell holder 120 when the battery cell 150 is fitted into the lower end of the rib 127 (FIG. 10 ( In the state of b), it is applied so as to protrude beyond the upper end) (upward in the state of FIG. 10B).
  • FIG. 10C shows a process of inserting the insulating sheet 6 between the battery cells 150.
  • the insulating sheet 6 is inserted between the battery cells 150 until the tip in the insertion direction adheres to the adhesive that extends below the lower end of the rib 127 (see the white arrow in FIG. 10C).
  • the insulating sheet 6 is preferably inserted until the tip in the insertion direction contacts the adhesive and contacts the lower end of the rib 127.
  • FIG. 10D shows a process of setting the lower case 110 to the cell holder 120.
  • the lower case 110 is engaged with the cell holder 120 so as to cover the cell holder 120 in which the battery cell 150 is inserted (see a white arrow in FIG. 10D).
  • the engaging claw 128 (see FIG. 7) of the cell holder 120 is engaged with the engaging hole 115 (see FIG. 5) of the lower case 110.
  • the first storage space 15 in which the end portion on the lower surface 7 side of the battery cell 150 is partitioned by the rib 116 (see FIG. 6). (Refer to FIG. 6 etc.). Thereby, the 2nd adhesion part 5b and the 4th adhesion part 5d (refer to Drawing 9) which adhere battery cell 150 and lower case 110 are formed.
  • the adhesive applied in the step shown in FIG. 10A that becomes the fourth adhesive portion 5d is fitted to the first accommodation space 15 of the lower case 110 when the battery cell 150 is fitted into the upper end of the rib 116 (FIG. 10D). In this state, it is applied so as to protrude beyond the lower end) (lower side in the state of FIG.
  • the distance between the battery cell 150 and the rib 127 is the battery cell 150 and the rib 116. Narrower than the distance between.
  • the distance between the battery cell 150 and the rib 127 is narrow.
  • the positioning accuracy of the lower surface 7 with respect to the lower case 110 does not need to be as high as the positioning accuracy of the cap surface 151 with respect to the cell holder 120.
  • the distance between the battery cell 150 and the rib 116 is relatively wide so that the assembly tolerance can be absorbed. Therefore, as shown in FIG. 10B, when the battery cell 150 is inserted into the second housing space 16 of the cell holder 120 to form the third adhesive portion 5c (see FIG. 9), the adhesive is applied in an amount of coating. Depending on the capillarity and viscosity, between the battery cell 150 and the rib 127, the lower side of the rib 127 (the upper end in the state of FIG. 10B) is lower (in the state of FIG. 10B). It extends beyond the upper side. Similarly, as shown in FIG. 10D, when the battery cell 150 is inserted into the first housing space 15 of the lower case 110 to form the fourth adhesive portion 5d (see FIG.
  • the adhesive is Depending on the coating amount, gravity, and viscosity, it passes between the battery cell 150 and the rib 116 and is above the upper end of the rib 116 (the lower end in the state of FIG. 10D) (the state of FIG. 10D). Then, it spreads out to the lower side.
  • the third adhesive portion 5 c can be extended to the lower side of the lower end of the rib 127
  • the fourth adhesive portion 5 d can be extended to the upper side of the upper end of the rib 116. . Therefore, it is possible to reduce the step of applying the adhesive only to adhere the insulating sheet 6 to any one of the battery cell 150, the lower case 110, and the cell holder 120, and as a result, it is possible to reduce the manufacturing cost. Become.
  • FIG. 10E shows a process of attaching the inter-cell bus bar 160, the total positive terminal bus bar 165, and the total negative terminal bus bar 164.
  • the battery cell 150, the lower case 110, the cell holder 120, and the insulating sheet 6 assembled together are turned upside down, and the positive terminal 152 and the negative terminal exposed from the opening 124a of the cell holder 120.
  • the inter-cell bus bar 160, the total plus terminal bus bar 165, and the total minus terminal bus bar 164 are attached to 153 by welding (see white arrows in FIG. 10E).
  • the assembly of the battery module 2 is completed by attaching the LBC 140 (see FIG. 1) to the holding lid 122.
  • the LBC 140 is attached to the holding lid 122 by, for example, screwing.
  • the battery module 2 according to the present embodiment is assembled through the above-described steps, but is not limited to the steps shown here.
  • the battery cell 150 can be placed in the lower case 110 without turning the lower case 110 and the cell holder 120 upside down.
  • the cell holder 120 may be engaged with the lower case 110 from above the space 110a (see FIG. 5).
  • the auxiliary machine module 3 of the assembled battery 100 will be described.
  • the auxiliary equipment module 3 is arranged on the auxiliary equipment base 200, the MOSFET 210, the relay 220, the current sensor 230 and the fusible link 240 arranged on the auxiliary equipment base 200, and the auxiliary equipment base 200.
  • the copper bus bar of this embodiment includes a copper bus bar 280 that electrically connects the terminal of the fusible link 240 and one terminal of the current sensor 230, and the other terminal of the current sensor 230 and the relay.
  • a copper bus bar 281 that electrically connects one terminal of 220, a copper bus bar 282 that electrically connects the other terminal of relay 220 and the terminal of MOSFET 210, and is electrically connected to this copper bus bar 282;
  • a copper bus bar 283 that electrically connects the other terminal of the relay 220 and the SSG terminal 250 via the copper bus bar 282, a copper bus bar 284 that electrically connects the terminal of the MOSFET 210 and the LOAD terminal 260, and a fusible link
  • a total plus copper bus bar 286 that electrically connects 240 terminals and a total plus terminal bus bar 165 of the battery module 2;
  • the total negative copper bus bar 285 electrically connects the total negative terminal bus bar 164 of the D terminal 270 and the battery module 2,
  • the upper case 300 has three openings 310a and 310b for exposing the SSG terminal 250, the LOAD terminal 260 and the GND terminal 270 from the upper case 300 when the assembled battery 100 is assembled. And 310c.
  • the upper case 300 includes engagement claws 320 for engaging the cell holder 120 on the lower surfaces of the four side surfaces.
  • the engagement claw 320 is provided at a position corresponding to the engagement hole 129b in a state where the cell holder 120 and the upper case 300 are assembled.
  • the engaging claw 320 extends in the lower surface direction from the outer side of each side surface, and the front end portion of the engaging claw 320 has a wedge shape in a side view.
  • the upper case 300 includes a bus bar protection unit 330 for protecting the total plus copper bus bar 286 and the total minus copper bus bar 285 in a state where the cell holder 120 and the upper case 300 are assembled.
  • Assembly of the battery module 2 and the auxiliary machine module 3 is realized by assembling the cell holder 120 and the auxiliary machine base 200.
  • the cell holder 120 and the auxiliary machine base 200 are assembled by fitting the engaging claws 205 into the engaging holes 129a and engaging them (see FIG. 1).
  • the cell holder 120 and the auxiliary machine base 200 are coupled using the bolts 340 in a state where the auxiliary machine base 200 is placed on the cell holder 120.
  • the insertion holes formed in the total plus copper bus bar 286 and the total minus copper bus bar 285 fixed to the auxiliary machine base 200 and the external connection portion 166 of the total plus terminal bus bar 165 and the total minus terminal bus bar 164 are formed.
  • the bolts 340 are screwed together in a state where the insertion holes 166a and the screw holes 123b of the cell holder 120 are in communication with each other. Thereby, the cell holder 120 and the auxiliary machine base 200 can be coupled indirectly via the total plus copper bus bar 286 and the total minus copper bus bar 285.
  • the cell holder 120 and the auxiliary machine base 200 are formed by inserting a bolt 350 from the upper surface side in a state where the auxiliary machine base 200 is placed on the cell holder 120, and screw holes 123 a of the cell holder 120.
  • the cell holder 120 and the auxiliary machine base 200 are screwed together.
  • the upper case 300 is assembled.
  • the upper case 300 is engaged with the cell holder 120 by engaging the engagement claw 320 with the engagement hole 129 b of the cell holder 120.
  • the assembly of the assembled battery 100 is completed by engaging the upper case 300 with the cell holder 120.
  • FIG. 11 is a diagram schematically illustrating an example of a modified example of the first frame body and the second frame body of the present embodiment.
  • a housing 4 ′ shown in FIG. 11 includes a lower case 110 ′ and a cell holder 120 ′.
  • the rib 116 ′ as the first frame shown in FIG. 11 is different in configuration in that it has an adhesion promoting portion that promotes the adhesion portion 5 to contact the insulating sheet 6 as compared with the rib 116 of the present embodiment.
  • other configurations are the same.
  • rib 127 'as a 2nd frame shown in FIG. 11 is comprised by the point which has the adhesion promotion part which accelerates
  • the other configurations are the same.
  • FIG. 12 is an enlarged cross-sectional view showing a part of the rib 127 ′ shown in FIG. 11 in an enlarged manner.
  • the adhesion promoting portion of the rib 127 ′ as the second frame is a groove 9 b provided in the rib 127 ′ as the second frame. More specifically, a groove 9b extending in the vertical direction is formed on the side surface of the rib 127 ′. The upper end of the groove 9b is closed by the lower surface of the holding lid 122 'of the cell holder 120'. Further, the lower end of the groove 9b extends to the lower end of the rib 127 ′ and is open.
  • the third adhesive portion 5c (see FIG. 9) is compared with the above-described rib 127 that does not have the groove 9b as the adhesion promoting portion. ) Can easily reach the lower side of the lower end of the rib 127 ′ through the groove 9 b as the adhesion promoting portion. Thereby, the structure which the insulating sheet 6 and the 3rd adhesion part 5c contact more easily is realizable. Further, a plurality (two in the example of FIG. 11) of the grooves 9b are arranged at a predetermined interval in the extending direction of the rib 127 ′.
  • the adjacent grooves 9b in the extending direction of the rib 127 ' may be formed on the same side surface of the rib 127' or may be formed on different side surfaces. In the example shown in FIG. 127 'is formed on the same side surface.
  • grooves (two grooves 9 a at both ends in FIG. 11) formed on the side surface located on the far side in the direction perpendicular to the paper surface are indicated by broken lines.
  • the thickness of the rib 127 ′ at the position of the groove 9 b is preferably made thinner than the thickness of the insulating sheet 6.
  • the adhesive as the third adhesive portion 5c that moves through the groove 9b is used not only for the surface in the thickness direction of the insulating sheet 6, but also for the upper end surface of the insulating sheet 6 at the open position of the lower end of the groove 9b. Can be easily contacted.
  • the area of the insulating sheet 6 which contacts an adhesive agent will increase, and the adhesive fixing of the insulating sheet 6 can be strengthened more.
  • the groove 9b of the rib 127 ′ as the second frame is shown, but the groove 9a of the rib 116 ′ as the first frame provided on the bottom wall 111 ′ of the lower case 110 ′ (see FIG. 12). 11) is the same as the groove 9b except that the vertical direction is opposite. Therefore, the adhesive as the fourth adhesive portion 5d (see FIG. 9) is likely to reach above the upper end of the rib 116 ′ by the groove 9a. Further, for the same reason as the groove 9b, it is preferable that the thickness of the rib 116 ′ at the position of the groove 9a is smaller than the thickness of the insulating sheet 6.
  • the groove 9a and the groove 9b as adhesion promoting portions shown in FIGS. 11 and 12 are formed at different positions in the extending direction of the rib 116 ′ and the rib 127 ′. By doing in this way, it can suppress that the dispersion
  • both the groove 9a and the groove 9b are formed, but only one of them may be formed. However, it is preferable that both the groove 9a and the groove 9b are formed so that the insulating sheet 6 is easily bonded and fixed.
  • FIG. 13 is a diagram schematically illustrating another modification of the first frame, the second frame, and the insulating sheet of the present embodiment.
  • the housing 4 ′′ shown in FIG. 13 includes a lower case 110 ′′ and a cell holder 120 ′′.
  • An adhesion promoting portion is configured by the groove 10b provided on the top end surface of the rib 127 ′′ as the second frame body of the cell holder 120 ′′.
  • the insulating sheet 6 ′′ is different from the insulating sheet 6 of the present embodiment in that the configuration has protrusions 6a ′′ at the upper and lower ends, and the other configurations are the same.
  • the rib 116 ′′ is fitted with the protruding portion 6a ′′ at the lower end of the insulating sheet 6 ′′ on the top end surface, and penetrates the rib 116 ′′ in the thickness direction, as compared with the rib 116 of the present embodiment.
  • the configuration is different in that it has a groove 10a to be used, and the other configurations are the same.
  • the rib 127 ′′ is fitted to the protruding portion 6a ′′ at the upper end of the insulating sheet 6 ′′ on the top end surface, and penetrates the rib 127 ′′ in the thickness direction.
  • the configuration is different in that it has a groove 10b to be used, and the other configurations are the same.
  • the third bonding which is a holder bonding portion
  • the portion 5c (see FIG. 9) and the fourth bonding portion 5d (see FIG. 9) can easily come into contact with the insulating sheet 6 ′′, and the insulating sheet 6 ′′ can be bonded and fixed more easily.
  • the protrusions 6 a ′′ are provided on both the upper end and the lower end of the insulating sheet 6 ′′, and the grooves 10 a and 10 b are provided on both the ribs 116 ′′ and the rib 127 ′′.
  • the protruding portion 6a ′′ is provided only on either the upper end or the lower end of the insulating sheet 6 ′′, and the rib 116 ′ corresponding to the upper end or the lower end of the insulating sheet 6 ′′ provided with the protruding portion 6a ′′. It is good also as a structure by which the groove
  • a plurality of protruding portions 6 a ′′ of the insulating sheet 6 ′′ are formed on the upper end and the lower end of the insulating sheet 6 ′′ respectively. It is preferable to avoid the position of 6a ′′ corresponding to the positive electrode terminal 152 (see FIG. 4), the negative electrode terminal 153 (see FIG. 4), and the safety valve 154 (see FIG. 4) of the battery cell 150. In this case, since the groove 10b is not formed in the rib 127 ′′ at a position in the vicinity of the positive electrode terminal 152, the negative electrode terminal 153, and the safety valve 154, the battery is compared with the configuration in which the groove 10b is formed at this position.
  • a wide bonding area between the cell 150 and the rib 127 ′′ can be secured. Therefore, the bonding strength between the battery cell 150 and the cell holder 120 ′′ around the positive electrode terminal 152 and the negative electrode terminal 153 can be secured, and the sealing performance around the safety valve 154 can be secured.
  • FIG. 14 is a diagram schematically showing another modification of the first frame body and the second frame body of the present embodiment. Specifically, FIG. 14 is a diagram schematically showing the cross-sectional shapes of the rib 516 as the first frame and the rib 527 as the second frame.
  • a housing 504 shown in FIG. 14 includes a lower case 510 and a cell holder 520.
  • the rib 516 serving as the first frame of the lower case 510 is different in cross-sectional shape from the rib 116 of the present embodiment.
  • the rib 527 as the second frame of the cell holder 520 has a different cross-sectional shape compared to the rib 127 of the present embodiment.
  • the top end surface 516a of the rib 516 as the first frame body and the top end surface 527a of the rib 527 as the second frame body are in the thickness direction of the ribs as the respective frame bodies. It is formed by a uniform inclined surface that is inclined with respect to the surface. Further, the top end surface 516a of the rib 516 and the top end surface 527a of the rib 527 shown in FIG. 14 are inclined to the opposite side with respect to the thickness direction of the rib as each frame body.
  • the insulating sheet 6 is guided by the inclined surface and adjacent to each other. Since it approaches one side of the battery cell 150, the insulating sheet 6 can be more reliably brought into contact with the bonding portion 5 (see FIG. 9) on the one side. Moreover, since the top end surface 516a of the rib 516 is an inclined surface, the height to the top end surface 516a at one end in the thickness direction is lower than the height to the top end surface 516a at the other end in the thickness direction (example in FIG. 14).
  • the left end of the top end face 516a is lower than the right end).
  • the adhesive as the adhesive portion 5 can easily reach the insulating sheet 6 from that position.
  • the adhesive as the bonding portion 5 and the insulating sheet 6 can be more easily contacted.
  • the rib 527 The same applies to the rib 527.
  • FIG. 15 is a diagram schematically showing still another modified example of the first frame and the second frame of the present embodiment.
  • a housing 604 shown in FIG. 15 includes a lower case 610 and a cell holder 620.
  • the rib 616 as the first frame of the lower case 610 shown in FIG. 15 has a different cross-sectional shape as compared with the rib 116 of the present embodiment.
  • the rib 627 as the second frame of the cell holder 620 shown in FIG. 15 has a different cross-sectional shape compared to the rib 127 of the present embodiment.
  • FIG. 16 is a diagram schematically showing the cross-sectional shapes of the rib 616 as the first frame and the rib 627 as the second frame.
  • an accommodation groove 11 a that accommodates the insulating sheet 6 that extends along the extending direction of the rib 616 is formed on the top end surface 616 a of the rib 616 serving as the first frame body.
  • a housing groove 11 b that houses the insulating sheet 6 that extends along the extending direction of the rib 627 is formed on the top end surface 627 a of the rib 627 serving as the second frame.
  • the insulating sheet 6 can be positioned more reliably.
  • the adhesive agent as the adhesion part 5 may become difficult to contact the insulating sheet 6 by the groove wall which divides the accommodation grooves 11a and 11b. Therefore, as shown in FIG. 16, the groove wall 11a1 that defines the receiving groove 11a of the rib 616 as the first frame body has an opening 12a that leads from the receiving groove 11a to the side of the rib 616. Is preferred. Further, as shown in FIG.
  • the groove wall 11b1 that defines the receiving groove 11b of the rib 627 as the second frame body has an opening 12b that communicates from the receiving groove 11b to the side of the rib 627. Is preferred.
  • the adhesive as the bonding portion 5 can easily enter the housing grooves 11a and 11b through the openings 12a and 12b. As a result, the adhesive as the bonding portion 5 is likely to come into contact with the insulating sheet 6.
  • the opening 12a is formed in the rib 616 as the first frame, and the opening 12b is formed in the rib 627 as the second frame.
  • An opening may be formed in only one of the ribs. However, if the openings are formed in both the ribs 616 and 627 as in the example shown in FIGS. 15 and 16, the adhesive fixing of the insulating sheet 6 can be made stronger.
  • the openings 12a and 12b are groove-shaped openings that open to the top end surfaces 616a and 627a. .
  • the housing grooves 11a ′ and 11b ′ may be defined by the groove walls 11a1 ′ and 11b1 ′ in which the groove width W gradually decreases toward the groove bottom. If the groove width W is such that the receiving grooves 11a ′ and 11b ′ gradually decrease toward the groove bottom, the tapered groove walls 11a1 ′ and 11b1 ′ serve as guide surfaces, and the insulating sheet 6 is easily guided to the groove bottom. Thus, the positioning of the insulating sheet 6 can be realized more easily.
  • the assembled battery according to the present invention is not limited to the specific configurations shown in the above-described embodiments and modifications, and various modifications can be made without departing from the scope of the claims. is there. For example, it is also included in the technical scope of the present invention to appropriately combine the configurations shown in the above-described embodiments and modifications to make another configuration.
  • the present invention relates to an assembled battery.
  • Battery module 3 Auxiliary machine module 4, 4 ′, 4 ′′, 504, 604 Housing 5

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WO2022035295A1 (ko) * 2020-08-14 2022-02-17 주식회사 엘지에너지솔루션 배터리 팩, 그리고 이를 포함하는 자동차
CN119725921A (zh) * 2020-12-29 2025-03-28 东莞新能安科技有限公司 电池模组、电池包及无人机
KR102798589B1 (ko) * 2021-01-14 2025-04-18 주식회사 엘지에너지솔루션 전지 모듈 및 이를 포함하는 전지 팩
US12046773B2 (en) * 2021-12-17 2024-07-23 GM Global Technology Operations LLC Battery module cover with thermal runaway mitigation
CN115332698B (zh) * 2022-08-15 2023-09-29 东莞市博森新能源有限公司 一种安全防护式锂电池及其制造方法

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JP2015002082A (ja) * 2013-06-14 2015-01-05 株式会社Ｇｓユアサ 蓄電装置
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