WO2022080845A1 - 폼 키트 조립체를 구비하는 배터리 팩 및 그 제조 방법 - Google Patents

폼 키트 조립체를 구비하는 배터리 팩 및 그 제조 방법 Download PDF

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Publication number
WO2022080845A1
WO2022080845A1 PCT/KR2021/014080 KR2021014080W WO2022080845A1 WO 2022080845 A1 WO2022080845 A1 WO 2022080845A1 KR 2021014080 W KR2021014080 W KR 2021014080W WO 2022080845 A1 WO2022080845 A1 WO 2022080845A1
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WO
WIPO (PCT)
Prior art keywords
foam
battery pack
kit
kit assembly
liquid
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/KR2021/014080
Other languages
English (en)
French (fr)
Korean (ko)
Inventor
구자언
유재욱
공진학
권민호
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.)
LG Chem Ltd
Original Assignee
LG Chem Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to CN202180065718.7A priority Critical patent/CN116368668B/zh
Priority to US18/030,161 priority patent/US12614798B2/en
Priority to EP21880492.0A priority patent/EP4213287A4/en
Priority to JP2023514128A priority patent/JP7657914B2/ja
Publication of WO2022080845A1 publication Critical patent/WO2022080845A1/ko
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • 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
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • 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 battery pack having a foam kit assembly and a method for manufacturing the same, and more particularly, to a battery pack having a foam kit assembly capable of uniformly filling the inside of a battery pack case with foam and a method for manufacturing the same it's about
  • a secondary battery is a battery capable of charging and discharging, and is used in various fields from smartphones to electric vehicles.
  • the secondary battery is used in the form of one battery cell or a battery pack in which a plurality of battery cells are connected according to the type of device in which the secondary battery is used.
  • a secondary battery used in a small device such as a smartphone is used in the form of one battery cell.
  • a secondary battery used in a medium or large device such as an electric vehicle is used in the form of a battery pack in which a plurality of battery cells are connected.
  • a large number of battery cells are required to satisfy the output voltage and charging capacity required in the medium-large device.
  • These battery cells are manufactured to be densely packed in a narrow space, and foam is filled between them.
  • Foam serves many roles, such as blocking heat transfer between a plurality of battery cells, directing material leaking from a failed battery cell away from other battery cells, and preventing short circuits between the plurality of battery cells.
  • This foam is injected into the battery pack housing through a plurality of ports on the sidewall of the battery pack housing.
  • a plurality of batteries arranged narrowly within the battery pack housing due to the narrow spacing between the plurality of battery cells. It is not easy to evenly fill the foam between the cells.
  • the foam generally used for the battery pack has a high viscosity, it is difficult to deeply inject the foam from the outer shell of the battery pack housing to the center of the inside through the port. is difficult to obtain
  • Patent Document 1 KR10-2019-0097231 A
  • Patent Document 2 KR10-0897899 B1
  • the present invention provides a battery pack having a foam kit assembly capable of uniformly filling the inside of the battery pack case with foam, and a method for manufacturing the same.
  • a battery pack having a foam kit assembly includes: a battery pack case in which an inner space is formed; a plurality of battery cells accommodated in the inner space of the battery pack case and arranged in a horizontal direction, each of which extends in a vertical direction; a foam kit assembly housed in the inner space of the battery pack case to be positioned on the plurality of battery cells and isolated from the outside; and a foam discharged from the foam kit assembly and filled between the inner surface of the battery pack case and the foam kit assembly, wherein the foam kit assembly extends in the horizontal direction, and the A support frame provided with one or more openings to allow the liquid foam to pass in the vertical direction; a foam kit that is seated on the support frame so as to be pressed in contact with the top cover of the battery pack case and has an accommodating space for accommodating the liquid foam therein; and a pressure needle protruding from the support frame so as to penetrate the foam kit, and the foam includes, wherein the liquid foam passes through the through hole of the foam kit formed by the
  • the foam kit is characterized in that the upper surface is pressed downward in contact with the top cover, and the lower surface is penetrated by the pressure needle.
  • the battery pack case may include: the housing having an interior open upward; and the top cover mounted on the upper opening of the housing so as to press the foam kit of the foam kit assembly downward.
  • the foam is formed in a solid state by foaming and curing of the liquid foam, and it surrounds each of the plurality of battery cells and uniformly fills gaps between the plurality of battery cells in the vertical direction.
  • the support frame discharged from the through hole of the foam kit, characterized in that it supports the upper form of the foam formed between the plurality of battery cells, the support frame, the inside of the opening of the upper portion of the housing a rim member extending along the circumference; It is disposed on the inside of the frame member to seat the foam kit, is extended in the horizontal direction and supported by the frame member, and the one or more openings are formed in a grid shape. .
  • the pressure needle protrudes upward from a plurality of positions on the upper surface of the stem member, and the lower surface of the foam kit is penetrated by the pressure needle, and between the penetrating portion of the foam kit and the outer peripheral surface of the pressure needle. , characterized in that a gap is formed to allow the liquid foam to flow down.
  • the plurality of battery cells are divided into a plurality of groups according to positions in the horizontal direction, and the pressure needles are provided in plurality so as to be vertically aligned at the center position of each of the plurality of groups in the horizontal direction. It is characterized in that they are spaced apart from each other in the direction.
  • the foam kit a pouch-type vinyl membrane; and at least one storage chamber formed in the interior of the pouch-type vinyl membrane to accommodate the liquid foam, and the liquid foam is characterized in that it is a one-component liquid foam.
  • the foam kit a pouch-type vinyl membrane; a plurality of storage chambers formed inside the pouch-type vinyl film to accommodate the liquid foam;
  • a separation membrane that is provided inside the pouch-type vinyl membrane to partition the plurality of storage chambers and that can be broken by pressure applied from the top cover to the pouch-type vinyl membrane; is configured to include, and the liquid foam is a two-component type It is a liquid foam, and the main and curing agent of the two-component liquid foam can be accommodated in each of the plurality of storage compartments.
  • the pouch-type vinyl film is characterized in that it can be melted at the exothermic temperature during foaming and curing of the liquid foam.
  • a battery pack manufacturing method having a foam kit assembly is arranged in a horizontal direction in a housing having an open interior, and a battery cell accommodation for accommodating a plurality of battery cells each extending in the vertical direction. step; A foam kit assembly arrangement step of disposing a foam kit assembly having a liquid foam stored therein on the plurality of battery cells; a battery pack case assembling step of assembling a battery pack case by mounting a top cover in an opening of an upper portion of the housing; a liquid foam spreading step of pressing the foam kit assembly while in contact with the top cover to penetrate a part of the foam kit assembly and spreading the liquid foam from the inside of the foam kit assembly to the entire interior space of the battery pack case; It is characterized in that it comprises a; foam forming step of foaming and curing the liquid foam to form a foam between the inner surface of the battery pack case and the foam kit assembly.
  • the foam kit assembly arrangement step may include: a support frame seating step of seating the support frame of the foam kit assembly on the plurality of battery cells; a foam kit seating step of seating the foam kit of the foam kit assembly on the support frame; It characterized in that it comprises; a pressure needle contacting step of contacting the foam kit with the pressure needle of the foam kit assembly protruding from the support frame.
  • the liquid foam spreading step may include a foam kit pressing step of pressing the foam kit downward with the top cover; a discharge hole forming step of penetrating the pressure needle through the lower surface of the foam kit to form a discharge hole; and a liquid foam discharging step of discharging the liquid foam accommodated in the foam kit onto the plurality of battery cells through a gap between the discharge hole and the outer peripheral surface of the pressure needle.
  • the liquid foam spreading step may include a liquid foam spreading step of spreading the liquid foam on the plurality of battery cells in a horizontal direction; From the top to the bottom of each of the plurality of battery cells, a liquid foam flowing step for inducing a falling flow of the liquid foam; characterized in that it is configured to include.
  • the foam forming step may include: a liquid foam solidifying step of solidifying the liquid foam by foaming and curing;
  • the battery cell is a cylindrical secondary battery, and the foam formed through the foam forming step is characterized in that the gap between the plurality of battery cells is uniformly filled in the vertical direction.
  • the foam kit assembly is used while assembling the battery pack case and the foam is formed inside the battery pack case.
  • the foam kit assembly can be uniformly charged. Accordingly, the uniformity of the foam inside the battery pack case can be ensured, and the time required for manufacturing the battery pack can be reduced.
  • FIG. 1 is an exploded perspective view of a foam kit assembly and a battery pack having the same according to an embodiment of the present invention.
  • FIG. 2 is a plan view of a support frame and a pressure needle according to an embodiment of the present invention.
  • FIG. 3 is an exploded perspective view of a foam kit assembly according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a foam kit according to a modification of the present invention.
  • FIG. 5 is a view for explaining the liquid foam diffusion step and the foam forming step of the battery pack manufacturing method having a foam kit assembly according to an embodiment of the present invention.
  • FIG. 6 is a view for explaining a foam forming step according to an embodiment of the present invention.
  • 1 is an exploded perspective view of a foam kit assembly and a battery pack having the same according to an embodiment of the present invention.
  • 2 is a plan view of a support frame and a pressure needle according to an embodiment of the present invention.
  • 3 is an exploded perspective view of a foam kit assembly according to an embodiment of the present invention.
  • a battery pack having a form kit assembly according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3 .
  • the battery pack may include a battery pack case 100 , a plurality of battery cells 200 , a form kit assembly 300 , and a form (f).
  • the battery pack case 100 has an internal space to accommodate the plurality of battery cells 200 .
  • the battery pack case 100 may have a rectangular cylindrical shape. Of course, the shape of the battery pack case 100 may vary.
  • a plurality of battery cells 200 , the form kit assembly 300 , and the form f may be accommodated in the battery pack case 100 .
  • the plurality of battery cells 200 may be located below the foam kit assembly 300 .
  • the foam (f) may be formed to surround each of the plurality of battery cells 200 while completely enclosing the plurality of battery cells 200 .
  • the form f may be formed to fill the gap S between the plurality of battery cells 200 while filling the space between the plurality of battery cells 200 and the inner surface of the battery back case 100 . there is.
  • the battery pack case 100 includes the top cover 120 mounted in the opening of the upper part of the housing 110 so as to press the housing 110 and the foam kit assembly 300 having the inside open upwards downward. may be included.
  • the housing 110 includes a plate-shaped lower plate 111 having a predetermined area in which the plurality of battery cells 200 can be seated, and extending along the circumference of the lower plate 111 and having a predetermined height, for example, a plurality of batteries. It may be configured to include an upper frame 112 in the shape of a quadrangular tubular having a predetermined height higher than the cell 200 .
  • the top cover 120 may extend in a horizontal direction and may have a predetermined area to be seated on the upper end of the upper frame 112 .
  • the plurality of battery cells 200 are accommodated in the inner space of the battery pack case 100 and may be arranged in a horizontal direction.
  • Each of the plurality of battery cells 200 may be a cylindrical secondary battery cell extending in the vertical direction.
  • a separator is interposed between a positive electrode plate with a positive electrode tab and a negative electrode plate with a negative electrode tab, and the electrode assembly in which the positive electrode plate, the separator, and the negative electrode plate are wound in the form of a jelly roll is formed in the cell case. It may be provided in a form accommodated therein.
  • electrode terminals may be formed on one side and the other side opposite to the one side. In this case, when the positive terminal is formed on one side of the secondary battery cell, the negative terminal may be formed on the other side opposite to the one side.
  • the plurality of battery cells 200 are arranged in a row direction and a column direction, and the battery cells arranged in the row direction have positive and negative terminals alternately arranged upward, and the battery cells arranged in the column direction have the same electrode terminal.
  • the battery pack case 100 may be accommodated in the inner space of the battery pack case 100 by being disposed upward.
  • the plurality of battery cells 200 may be connected in series in a row direction by a bus bar (not shown), and may be connected in parallel in a column direction, respectively.
  • a structure in which the plurality of battery cells 200 are disposed and a connection method thereof may vary.
  • the row direction may be referred to as a left-right direction
  • the column direction may be referred to as a front-back direction.
  • the left-right direction and the front-rear direction are collectively referred to as the horizontal direction.
  • a direction crossing the horizontal direction may be referred to as a vertical direction.
  • the foam kit assembly 300 is accommodated in the inner space of the battery pack case 100 so as to be positioned on the plurality of battery cells 200 and is isolated from the outside.
  • the foam kit assembly 300 may be partially penetrated by being pressed by contact with the battery pack case 100 .
  • the penetrated portion of the foam kit assembly 300 may be used as a passage through which the liquid foam is discharged during the manufacture of a battery pack to be described later. That is, the foam kit assembly 300 serves to supply the liquid foam to the inner space of the battery pack case 100 .
  • the foam kit assembly 300 may include a support frame 310 , a foam kit 320 , and a pressure needle 330 .
  • the support frame 310 may be disposed on the plurality of battery cells 200 .
  • the support frame 310 may be formed to extend in a horizontal direction.
  • the support frame 310 may seat the foam kit 320 on the upper surface.
  • the support frame 310 may be provided with one or more openings to allow the foam to pass through in the vertical direction.
  • the support frame 310 includes a spoke member 311 in which one or more openings described above are formed in a grid shape, a frame member 312 on which the edge of the spoke member 311 is supported, and the frame member 312 in a housing ( It may be configured to include a locking member 313 to be seated on the upper end of the upper frame 112 of the 110).
  • the spoke member 311 may have a predetermined area to allow the foam kit 320 to be seated.
  • the spoke member 311 may be disposed inside the rim member 312 , may extend in a horizontal direction, and may be supported under the rim member 312 .
  • the spoke member 311 may have one or more openings formed in a grid shape.
  • the rib member 311 may include a plurality of first ribs extending in the left and right directions and a plurality of second ribs extending in the front-rear direction. In this case, the plurality of first poles and the plurality of second poles may be arranged in a lattice shape and interconnected.
  • the frame member 312 is formed to extend along the inner circumference of the opening in the upper portion of the housing 110 .
  • the edge member 312 may be formed, for example, in a rectangular frame shape.
  • the frame member 312 may be inserted into the opening of the upper portion of the housing 110 and may be in contact with the inner surface of the opening of the upper portion of the housing 110 .
  • the locking member 313 may be formed by bending the upper end of the edge member 312 outward. That is, the locking member 313 may have a rectangular ring shape.
  • the lower surface of the locking member 313 may be seated on the upper end of the upper frame 112 of the housing 110 .
  • the top cover 120 may be seated on the upper surface of the locking member 313 .
  • the locking member 313 may be inserted into the opening of the upper portion of the housing 110 .
  • the frame member 312 may be spaced apart from the inner surface of the opening of the upper portion of the housing 110 within the opening of the upper portion of the housing 110 , and the top cover 120 may be disposed on the upper frame of the housing 110 ( 112) may have a structure that is seated on the top.
  • the foam kit 320 is seated on the support frame 310 so that it can be pressed downward in contact with the top cover 120 , and an accommodating space capable of accommodating the liquid foam is formed therein. That is, the foam kit 320 serves to temporarily store the liquid foam therein, and then spray the liquid foam therein into the inner space of the battery pack case 100 when the battery pack is manufactured.
  • the thickness t2 in the vertical direction of the foam kit 320 may be greater than the thickness t1 in the vertical direction of the frame member 312 . Accordingly, when the top cover 120 is assembled to the opening of the upper portion of the housing 110 , the foam kit 320 may contact the lower surface of the top cover 120 and be pressed downward.
  • the thickness t2 in the vertical direction of the foam kit 320 may be the same as the thickness t1 in the vertical direction of the frame member 312 .
  • the foam kit 320 may be seated on the pressure needle 330 to protrude a predetermined height upward of the rim member 312 , and the top cover 120 may be assembled into the opening of the upper portion of the housing 110 .
  • the kit 320 may be pressed downward in contact with the lower surface of the top cover 120 .
  • the foam kit 320 is seated on the pressure needle 330.
  • the protrusion height of the pressure needle 330 may be determined so as to protrude upward by a predetermined height.
  • the battery pack case 100 may not have a port for injecting liquid foam, and the structure of the battery pack case 100 may be simplified.
  • the foam kit 320 in the embodiment of the present invention, since the liquid foam is moved inside the battery pack case 100 , the manufacturing step of the battery pack can be simplified, and the It is possible to simplify the battery pack manufacturing facility by not using a device for forced injection of the liquid foam from the outside to the inside.
  • the foam kit 320 may include a pouch-type vinyl film 321 and at least one storage compartment 322 formed inside the pouch-type vinyl film 321 to accommodate the liquid foam.
  • the liquid foam may be a one-component liquid foam, and may include various materials that can be foamed and cured in contact with air.
  • the liquid foam may be kept in a liquid state by blocking contact with air by the pouch-type vinyl film 321 in a state accommodated in the storage chamber 322 .
  • the pouch-type vinyl film 321 is broken, the liquid foam flows into the inner space of the battery pack case 100 and comes into contact with air to be foamed and cured. At this time, predetermined heat may be generated.
  • the pouch-type vinyl film 321 may be disposed on the stem member 311 .
  • the pouch-type vinyl film 321 serves to temporarily store the liquid foam therein, and when a part is broken by the pressure needle 330 , the liquid foam inside is discharged into the inner space of the battery pack case 100 .
  • the pouch-type vinyl film 321 may include a predetermined material to be melted at the exothermic temperature during foaming and curing of the liquid foam, and may have a predetermined thickness. Accordingly, when the foaming and curing of the liquid foam is completed and the foam (f) is formed, at least a portion of the pouch-type vinyl film 321 may be melted and removed by heat.
  • the pressure needle 330 protrudes from the support frame 310 to penetrate the foam kit 320 . Specifically, the pressure needle 330 protrudes upward from a plurality of positions on the upper surface of the stem member 331 , and thus, when assembling the battery pack case 100 , the foam kit 320 is lowered by the pressure needle 330 . This can be penetrated.
  • the pressure needle 330 may be formed in a cone shape. Of course, the shape of the pressure needle 330 may vary.
  • a gap to allow the liquid foam to flow down may be formed, and the liquid inside the foam kit 320 through this gap Foam may flow downwards.
  • the plurality of battery cells 200 may be divided into a plurality of groups according to positions in the horizontal direction.
  • a plurality of pressure needles 330 are provided to be vertically aligned at the center position of each of the plurality of groups, and each of the pressure needles 330 may be spaced apart from each other in the horizontal direction. Accordingly, the above-described gaps that allow the liquid foam to flow down may be uniformly spaced apart from each other in the horizontal direction, and the liquid foam may be uniformly supplied onto the plurality of battery cells 200 during the manufacture of the battery pack. there is.
  • the foam f is discharged from the foam kit assembly 300 and is filled between the inner surface of the battery pack case 100 and the foam kit assembly 300 .
  • the foam (f) is discharged downward from the portion penetrated by the pressure needle 330 of the foam kit assembly 300 to close the gap (S) between the plurality of battery cells 200 in the vertical direction.
  • FIG. 4 is a schematic diagram of a foam kit according to Modification Example 1 of the present invention.
  • the foam kit 320 ′ according to Modification Example 1 of the present invention includes a plurality of pouch-type vinyl films 321 and a plurality of pouch-type vinyl films 321 formed inside the pouch-type vinyl film 321 to accommodate the liquid foam.
  • the storage chambers 322a, 322b and the plurality of storage chambers 322a and 322b are provided inside the pouch-type vinyl film 321 to partition, and the pressure applied from the top cover 120 to the pouch-type vinyl film 321 is It is configured to include a separation membrane 323 that can be broken by the
  • the liquid foam may be a two-component liquid foam. That is, the liquid foam may be configured to include a base material and a curing agent. In this case, the main agent and the curing agent should be separated from each other and mixed at the time of forming the foam (f). Accordingly, a plurality of storage chambers 322a and 322b are provided inside the pouch-type vinyl film 321 , and the main agent and curing agent of the two-component liquid foam are accommodated in the plurality of storage chambers, respectively, and the battery pack case 100 of They may be mixed with each other by the breakage of the separation membrane 323 during assembly.
  • the separator 323 may be formed to a predetermined thickness to make it easier to break than the pouch-type vinyl film 321, and when the pouch-type vinyl film 321 is pressed by the top cover 120, the pressure needle ( 330), the pouch-type vinyl film 321 may be broken first before being penetrated.
  • the foam kit 320 is penetrated by the pressure needle 330 and the liquid foam flows down through the gap therebetween. At this time, the liquid foam flows down from the upper part of the battery cell to the lower part. At this time, the air near the lower part of the battery cell may not escape to the upper side of the liquid foam and may be isolated in the lower part of the battery pack case 100 by the liquid foam. In addition, when the liquid foam solidifies while foaming and curing, a predetermined gas may be released, and the released gas may accumulate in the lower portion of the battery pack case 100 .
  • the housing 110 of the battery pack case according to Modification Example 2 of the present invention may have a predetermined air pressure control hole (not shown).
  • the housing 110 includes a lower plate 111 having an area in which a plurality of battery cells 200 can be seated, and a plurality of battery cells 200 extending along the circumference of the lower plate 111 . It may be configured to include an upper frame 112 having a higher height.
  • the air pressure control hole is formed to extend from the inside of the lower plate 111 and the inside of the upper frame 112 , the inlet is formed on the upper surface of the lower plate 111 , and the outlet is the inner circumferential surface of the upper end of the upper frame 112 . Alternatively, it may be formed on the outer peripheral surface of the upper end of the upper frame 112 . At least one such air pressure control hole may be formed.
  • 5 is a view for explaining the liquid foam diffusion step and the foam forming step of the battery pack manufacturing method having a foam kit assembly according to an embodiment of the present invention.
  • 6 is a view for explaining a foam forming step according to an embodiment of the present invention.
  • a method of manufacturing a battery pack including a foam kit assembly according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6 .
  • the content overlapping with the above description of the battery pack having the form kit assembly according to the embodiment of the present invention will be omitted or simply described.
  • a method for manufacturing a battery pack having a foam kit assembly may include the following processes.
  • a plurality of battery cells 200 arranged in the horizontal direction and each extending in the vertical direction are accommodated in the housing 110 having the inside open upward.
  • Each of the plurality of battery cells 200 may be a cylindrical secondary battery.
  • the plurality of battery cells 200 may be electrically connected to each other by a bus bar (not shown).
  • the plurality of battery cells 200 may be spaced apart from each other by a predetermined distance to form a gap S between them.
  • the foam kit assembly arrangement step performs an operation of disposing the foam kit assembly 300 in which the liquid foam is stored on the plurality of battery cells 200 .
  • the foam kit assembly placement step includes a support frame seating step of seating the support frame 310 of the foam kit assembly 300 on the plurality of battery cells 200, and the foam kit 320 of the foam kit assembly 300.
  • a foam kit seating step of seating on the support frame 310 a pressure needle contacting step of bringing the pressure needle 330 of the foam kit assembly 300 protruding from the support frame 310 and the foam kit 320 into contact with each other can be configured.
  • the foam kit 320 since pressure by the top cover 120 is not applied to the foam kit 320 , the foam kit 320 may be seated on the pressure needle 330 .
  • the battery pack case is assembled by mounting the top cover 120 in the upper opening of the housing 310 .
  • the top cover 120 may be seated and mounted on the upper surface of the engaging member 313 .
  • the top cover 120 may be seated and mounted on the upper end of the upper frame 112 of the housing 110 .
  • the liquid foam diffusion step may be performed together. That is, in the embodiment of the present invention, the liquid foam diffusion step can be quickly performed by assembling the battery pack case 100 , thereby shortening the entire manufacturing process of the battery pack.
  • the liquid foam spreading step brings the foam kit 320 of the foam kit assembly 300 into contact with the lower surface of the top cover 120 and presses the foam kit 320 to form a part of the foam kit 320 of the foam kit assembly 300.
  • the operation of spreading the liquid foam from the inside of the foam kit 320 of the foam kit assembly 300 to the entire interior space of the battery pack case 100 is performed.
  • the liquid foam diffusion step includes a foam kit pressing step of pressing the foam kit 320 downward with the top cover 120 , and a discharge forming a discharge hole by penetrating the pressure needle 330 through the lower surface of the foam kit 320 . It includes a hole forming step and a liquid foam discharging step of discharging the liquid foam accommodated in the foam kit 320 onto the plurality of battery cells 200 through a gap between the discharge hole and the outer peripheral surface of the pressure needle 330 . can be configured.
  • the foam kit 320 is pressed downwardly with the top cover 120, and the foam kit ( 320) can be penetrated. Accordingly, a plurality of through-holes, for example, a discharge hole, may be formed on the lower surface of the foam kit 320 , and the liquid foam temporarily stored in the foam kit 320 may be moved downward through the gap between the through-hole and the pressure needle 330 . can be discharged smoothly.
  • a plurality of through-holes for example, a discharge hole
  • the liquid foam spreading step is a liquid foam spreading step of spreading the liquid foam on the plurality of battery cells 200 in the horizontal direction, and the falling flow of the liquid foam from the top to the bottom of each of the plurality of battery cells 200 ( It can be configured to include a liquid foam shedding step to induce F). That is, the liquid foam discharged onto the plurality of battery cells 200 through the through-hole has a predetermined viscosity, and before flowing down into the gap between the plurality of battery cells 200, flows in a horizontal direction that is easier to flow.
  • the battery cells 200 may be spread evenly in the horizontal direction. In this case, one or more lattice-shaped openings formed in the stem member 311 may be utilized.
  • the liquid foam may flow down from the top of each of the plurality of battery cells 200 through the gap S between the plurality of battery cells 200 .
  • the liquid foam may be uniformly filled in the vertical direction in the gap (S) between the plurality of battery cells (200).
  • the foam forming step may be performed while performing the liquid foam spreading step and the liquid foam flowing step.
  • the foam forming step is to form a solidified foam (f) between the inner surface of the battery pack case 100 and the foam kit assembly 300 by foaming and curing the liquid foam in the inner space of the battery pack case 100 .
  • the foam forming step is a liquid foam solidifying step of solidifying the liquid foam by foaming and curing
  • the pouch-type vinyl film 321 that constituted the exterior of the foam kit 320 is formed by foaming and curing the liquid foam.
  • It may be configured to include a foam kit exterior melting step of melting with heat, such as heat of about 40°C.
  • the liquid foam may be foamed and cured in contact with air inside the battery pack case 100 , or may be foamed and cured by mixing the main agent and the curing agent.
  • the foam f may be formed in the space occupied by the pouch-type vinyl film 321 .
  • only a portion of the pouch-type vinyl film 321 may be melted and removed by heat, or the entire pouch may remain on the support frame 310 .
  • the foam (f) formed through this foam forming step can uniformly fill the gap (S) between the plurality of battery cells 200 in the vertical direction, and after being solidified, heat transfer between the plurality of battery cells 200 is performed. It is possible to block, induce a material leaking from a failed battery cell to flow away from another battery cell, and prevent a short circuit between the plurality of battery cells 200 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)
PCT/KR2021/014080 2020-10-14 2021-10-13 폼 키트 조립체를 구비하는 배터리 팩 및 그 제조 방법 Ceased WO2022080845A1 (ko)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202180065718.7A CN116368668B (zh) 2020-10-14 2021-10-13 电池组以及制造该电池组的方法
US18/030,161 US12614798B2 (en) 2020-10-14 2021-10-13 Battery pack including foam kit assembly, and manufacturing method therefor
EP21880492.0A EP4213287A4 (en) 2020-10-14 2021-10-13 BATTERY PACK WITH FOAM KIT ARRANGEMENT AND PRODUCTION METHOD THEREOF
JP2023514128A JP7657914B2 (ja) 2020-10-14 2021-10-13 フォームキット組立体付きバッテリーパック及びその製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020200133011A KR102737970B1 (ko) 2020-10-14 2020-10-14 폼 키트 조립체를 구비하는 배터리 팩 및 그 제조 방법
KR10-2020-0133011 2020-10-14

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WO2022080845A1 true WO2022080845A1 (ko) 2022-04-21

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Country Status (6)

Country Link
US (1) US12614798B2 (cg-RX-API-DMAC7.html)
EP (1) EP4213287A4 (cg-RX-API-DMAC7.html)
JP (1) JP7657914B2 (cg-RX-API-DMAC7.html)
KR (1) KR102737970B1 (cg-RX-API-DMAC7.html)
CN (1) CN116368668B (cg-RX-API-DMAC7.html)
WO (1) WO2022080845A1 (cg-RX-API-DMAC7.html)

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WO2024107608A1 (en) * 2022-11-14 2024-05-23 Archer Aviation Inc. Systems and methods for improved battery assemblies for evtol aircraft
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Also Published As

Publication number Publication date
US12614798B2 (en) 2026-04-28
KR102737970B1 (ko) 2024-12-04
CN116368668B (zh) 2026-02-24
JP7657914B2 (ja) 2025-04-07
JP2023540722A (ja) 2023-09-26
US20230378582A1 (en) 2023-11-23
KR20220049410A (ko) 2022-04-21
EP4213287A1 (en) 2023-07-19
EP4213287A4 (en) 2024-03-20
CN116368668A (zh) 2023-06-30

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