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WO2019017637A1 - Matériau de gaine de poche de batterie secondaire, batterie secondaire de type poche l'utilisant et son procédé de fabrication - Google Patents

Matériau de gaine de poche de batterie secondaire, batterie secondaire de type poche l'utilisant et son procédé de fabrication Download PDF

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Publication number
WO2019017637A1
WO2019017637A1 PCT/KR2018/007813 KR2018007813W WO2019017637A1 WO 2019017637 A1 WO2019017637 A1 WO 2019017637A1 KR 2018007813 W KR2018007813 W KR 2018007813W WO 2019017637 A1 WO2019017637 A1 WO 2019017637A1
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WO
WIPO (PCT)
Prior art keywords
electrode assembly
pouch
secondary battery
type secondary
depth
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/KR2018/007813
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English (en)
Korean (ko)
Inventor
정태진
정병천
강달모
문정오
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
Priority claimed from KR1020180075766A external-priority patent/KR102109926B1/ko
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to CN201880004185.XA priority Critical patent/CN110062964B/zh
Priority to PL18834580T priority patent/PL3561899T3/pl
Priority to JP2019529972A priority patent/JP6734482B2/ja
Priority to EP18834580.5A priority patent/EP3561899B1/fr
Priority to US16/334,509 priority patent/US11239515B2/en
Publication of WO2019017637A1 publication Critical patent/WO2019017637A1/fr
Anticipated expiration legal-status Critical
Priority to US17/547,657 priority patent/US12057545B2/en
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
    • H01M50/60—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
    • H01M50/627—Filling ports
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a pouch outer cover material for a secondary battery, a pouch type secondary battery using the same, and a manufacturing method thereof. More particularly, the present invention relates to a pouch outer cover material for a secondary battery, And a method for manufacturing such a pouch-type secondary battery.
  • This application claims priority to Korean Patent Application No. 10-2017-0092152 filed on July 20, 2017 and Korean Patent Application No. 10-2018-0075766 filed on June 29, 2018 , The disclosure of which is incorporated herein by reference in its entirety.
  • Secondary batteries are widely used as power sources for mobile devices such as mobile phones, notebooks, and camcorders. Particularly, the use of a lithium secondary battery is rapidly increasing due to the advantage that the operating voltage is high and the energy density per unit weight is high.
  • Such a lithium secondary battery mainly uses a lithium-based oxide as a cathode active material and a carbonaceous material as an anode active material, and is generally classified into a lithium ion battery, a lithium ion polymer battery, and a lithium polymer battery depending on the type of electrolyte used. Depending on the external shape of the battery, it may be classified as a cylindrical battery, a square battery, and a pouch type secondary battery. Typically, there is a high demand for a prismatic secondary battery and a pouch-type secondary battery that can be applied to products such as mobile phones with a thin thickness in view of the shape of the battery.
  • the pouch type secondary battery has a structure in which an electrode assembly is embedded in a pouch outer case made of an aluminum laminate sheet. That is, in the pouch type secondary battery, a holding portion for mounting the electrode assembly is formed on the aluminum laminate sheet, and a separate aluminum laminate sheet separated from the aluminum laminate sheet in the state where the electrode assembly is mounted on the receiving portion, And an aluminum laminate sheet is thermally fused.
  • Such a pouch exterior member can form the receiving portion by partially compressing an aluminum laminate sheet having a thickness of approximately 113 mu m in a similar manner to the deep-drawing process using a die and a punch.
  • the aluminum laminate sheet having such a thin thickness as described above may be ruptured during the compression, it is difficult to form the receiving portion having a depth of 15 mm or more.
  • FIG. 1 is a top plan view of a conventional three-sided sealing pouch type secondary battery pouch.
  • FIG. 2 is a cross-sectional view of a pouch type secondary battery manufacturing method using the pouch outer casing of FIG. 1, and corresponds to a cross-sectional view taken along line II-II 'of
  • FIG. 3 is a top view of a pouch-type secondary battery manufactured by the method shown in FIG.
  • the receptacles 20a and 20b having two perfectly matching shapes and sizes are attached to one unit of the pouch outer casing 10 to a thickness larger than the thickness of the electrode assembly 30 And is formed so as to be spaced apart by a predetermined distance d.
  • This pouch type secondary battery manufacturing technique can reduce the depth t of the accommodating portions 20a and 20b forming the pouch outer casing 10 to approximately half the thickness of the electrode assembly 30, One of the surfaces (the bent central portion F side) can be kept in a sealed state.
  • the central portion F to be bent later is formed with the receiving portions 20a and 20b on both sides
  • the mechanical strength becomes weaker than in the case of stretching only in one direction. Therefore, there is a high possibility that the housing portions 20a and 20b are ruptured in the process of forming and / or bending the accommodating portions 20a and 20b. high. Therefore, the receptacles 20a and 20b are formed at a predetermined distance d apart from each other. In consideration of the bent shape of the folded portion of the pouch outer casing 10, And is formed so as to have a margin of 1.5 mm to 3 mm.
  • the pouch-type secondary battery has many demands from customers for high capacity and miniaturization, and researches and develops various structures and processes to realize the needs of customers.
  • pouch-type secondary batteries there are many attempts to increase the capacity of battery by utilizing unnecessary space to increase the capacity.
  • Fig. 4 is a schematic view showing a production example of a conventional pouch-type secondary battery according to a process order.
  • the pouch outer casing 60 which has been processed to have a required length and width, is bent at a substantially central portion C in the longitudinal direction to form the pouch outer casing 60, (40). At this time, the lead 50 drawn out from the electrodes forming the electrode assembly 40 is led to the tip end side of the pouch outer casing 60.
  • Fig. 4 According to the manufacturing form of Fig. 4, no folding portion is formed. However, as shown in Fig. 4 (b), the protruding portion is generated in the direction of the bottom surface as the pouch exterior member 60 of the folded portion is pressed at the time of sealing (S) .
  • These protrusions like the above-mentioned folding parts, act as a limitation of the cell capacity and are inhibited to increase the energy density in the module / pack, and they are arranged in a bur form called a bat ear, there is a problem.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide an electrode assembly which can easily mount the electrode assembly in a proper position in a storage unit and minimizes a sealing part in contact with the atmosphere, And it is an object of the present invention to provide a pouch exterior material which can prevent the pouch exterior material from being ruptured during the assembling process and can prevent an unnecessary space such as a folding portion and a protruding portion to improve the energy density of the cell.
  • Another object of the present invention is to provide a pouch type secondary battery using the pouch case and a method of manufacturing the same.
  • a pouch outer cover material for a secondary battery is a unit-type sheet pouch outer cover material used for packaging an electrode assembly, and is formed at the center of the pouch outer cover material and has a width An insertion portion; A receiving portion which is gradually deeper from a portion corresponding to a middle portion of the electrode assembly width to a portion corresponding to an edge of the electrode assembly and formed symmetrically on both sides of the insertion portion; And a triangular step formed at both ends of the insertion part and having a gradually decreasing depth toward the end.
  • the depth of the bottom edge of the accommodating portion remote from the inserting portion is preferably at least one-half of the thickness of the electrode assembly.
  • the inserting portion and the receiving portions are flat sections. And the outer side of the receiving portion facing the insertion portion may be elongated relatively long.
  • the pouch type secondary battery according to the present invention includes an electrode assembly housed in the pouch case and thermally fused.
  • the pouch type secondary battery according to the present invention includes an electrode assembly; And a unit-type sheet-like pouch exterior member used to package the electrode assembly, wherein the pouch exterior member comprises: an insertion portion formed at the center of the pouch exterior member and having a width corresponding to the thickness of the electrode assembly; A receiving portion which is gradually deeper from a portion corresponding to a middle portion of the electrode assembly width to a portion corresponding to an edge of the electrode assembly and formed symmetrically on both sides of the insertion portion; And a triangular step formed at both ends of the insertion part and having a gradually decreasing depth toward the end.
  • An insertion unit formed at the center of the pouch exterior member and having a width corresponding to the thickness of the electrode assembly, the unit-type pouch outer case being used to package the electrode assembly; A receiving portion which is gradually deeper from a portion corresponding to a middle portion of the electrode assembly width to a portion corresponding to an edge of the electrode assembly and formed symmetrically on both sides of the insertion portion; And a triangular stepped portion formed at both ends of the insertion portion and having a gradually decreasing depth toward the end, the method comprising: preparing a pouch exterior member; Placing the side of the electrode assembly on the inserting portion and folding the pouches on both pouches to overlap the pouches; And thermally fusing the periphery of the stacked receptacles.
  • the outer side of the pouch exterior member facing the inserting portion is elongated by a relatively long length so that the insides of the pouch exterior member are covered with the insides of the inserting portion and then the portion excluding the outside of the inserting portion is thermally fused and the electrolyte is injected through the outside of the inserting portion, And then cutting the outer side of the receiving portion.
  • the present invention provides a pouch exterior material that can eliminate an unnecessary space of a folding portion in a three-sided pouch-shaped secondary battery, and prevents a protrusion after a sealing from being formed.
  • the pouch outer sheath according to the present invention is not folded at the central portion as in the prior art but is folded up on both sides of the pouch outer sheath in a state where the electrode assembly side is mounted on the inserting portion so that the pouch outer sheath It is not necessary to have a margin of 1.5 mm to 3 mm.
  • the present invention it is possible to maximize the area of the electrode assembly in the pouch exterior material without leaving an unnecessary space in the cell, so that the energy density of the cell can be improved. It is possible not only to increase the cell capacity by deleting the unnecessary space of the folding unit but also to increase the energy density of the module / pack including the pouch type secondary battery.
  • the module / pack cooling structure and the assembling process can be simplified by deleting an unnecessary space of the folding unit.
  • the bottom surface of the pouch type secondary battery the surface corresponding to the side surface of the electrode assembly sandwiched by the inserting portion
  • the bottom surface can be brought into close contact with the cooling member,
  • the module / pack cooling performance of the module can be improved.
  • the pouch type secondary battery according to the present invention does not have burr-shaped protrusions, it does not hinder the assembling process efficiency since the pouch type secondary battery can not be assembled in assembling the module.
  • the pouch outer sheath according to the present invention can prevent the pouch outer sheath from being ruptured during the manufacturing process to reduce the defective rate and can mount the electrode assembly in a proper position without any additional device, , Moisture and the like, and the possibility of leakage of the electrolytic solution can be further reduced, thereby improving the lifetime characteristics of the battery.
  • FIG. 1 is a top plan view of a conventional three-sided sealing pouch type secondary battery pouch.
  • FIG. 2 is a cross-sectional view of a pouch type secondary battery manufacturing method using the pouch outer casing of FIG. 1, and corresponds to a cross-sectional view taken along line II-II 'of FIG.
  • FIG. 3 is a top view of a pouch-type secondary battery manufactured by the method shown in FIG.
  • Fig. 4 is a schematic view showing a production example of a conventional pouch-type secondary battery according to a process order.
  • FIG. 5 is an exploded perspective view of a pouch type secondary battery according to an embodiment of the present invention.
  • FIG. 6 is a top view of the pouch exterior material included in Fig.
  • FIG. 8 is a cross-sectional view of the pouch type secondary battery manufacturing method using the pouch exterior member of FIG. 7, which corresponds to the section VII-VII 'of FIG.
  • FIG. 9 is a top view of a pouch type secondary battery manufactured by the method shown in FIG.
  • FIG. 10 is a schematic cross-sectional view illustrating the configuration of a battery module including a pouch type secondary battery according to the present invention.
  • FIG. 11 is a photograph of a pouch exterior member manufactured according to the experimental example of the present invention.
  • FIG. 12 is a photograph of a pouch type secondary battery manufactured using the pouch exterior member of Fig. 13 is a photograph of a sealing part of a pouch type secondary battery according to the prior art.
  • FIG. 14 is a photograph of a pouch-type secondary battery manufactured using the pouch case according to another experimental example of the present invention.
  • FIG. 15 is a photograph of the bottom surface of the pouch type secondary battery shown in Fig.
  • 16 is a photograph of a bottom surface of a pouch type secondary battery according to the prior art.
  • FIG. 5 is an exploded perspective view of a pouch type secondary battery according to an embodiment of the present invention.
  • 6 is a top view of the pouch exterior material included in Fig. 7 corresponds to a section of VII-VII 'of Fig.
  • the pouch type secondary battery 100 includes an electrode assembly 200 and a pouch case 300.
  • the electrode assembly 200 may be a stacked (stacked) electrode assembly in which a plurality of positive electrode plates and negative electrode plates cut in units of a predetermined size are sequentially stacked with a separator interposed therebetween.
  • the positive electrode lead 210 and the negative electrode lead 220 of the electrode assembly 200 protrude from opposite sides of the pouch case 300.
  • two corresponding receivers 310a and 310b are formed.
  • An insertion portion 315 is formed between the storage portions 310a and 310b and the storage portions 310a and 310b are not in communication with each other.
  • the receiving portions 310a and 310b are symmetrically formed on both sides of the insertion portion 315.
  • the receptacles 310a and 310b are gradually deeper from the portions a1 and b1 corresponding to the middle width of the electrode assembly 200 toward the portions a2 and b2 corresponding to the edge of the electrode assembly 200.
  • the pouch exterior member 300 between the insertion portion 315 and the receiving portions 310a and 310b is a flat section.
  • the inserting portion 315 has a width as much as the thickness T of the electrode assembly 200 compared with a distance between the accommodating portions that is greater than the thickness of the electrode assembly by a distance of about 1.5 to 3 mm, .
  • the distance between the two receiving portions 310a and 310b is larger than the conventional case.
  • the mechanical strength of a specific portion is weakened in forming the pouch exterior member 300 to form the insertion portion 315 and the receptacles 310a and 310b as compared with the case where the receptacles are conventionally formed adjacent to each other There is no fear of rupture.
  • the receiving portions 310a and 310b are formed on both sides of the inserting portion 315.
  • a triangular step portion 317 is formed at both ends of the inserting portion 315 orthogonal to both sides of the inserting portion 315, . If the length of the triangular step 317 is short, the inclination of the bottom of the triangular step 317 is relatively steep. If the length of the triangular step 317 is long, the inclination of the bottom of the triangular step 317 is relatively gentle. Also, if the depth h of the insert 315 is deep, the inclination of the bottom of the triangular step 317 is relatively steep.
  • the depth h of the insertion portion 315 is shallow, the inclination of the bottom of the triangular step 317 is relatively gentle.
  • the depth h of the inserting portion 315 and the shape of the triangular step 317 determine the final shape of the sealing portion during the thermal welding step in manufacturing the pouch type secondary battery.
  • reference numerals 320, 330, and 350 denote an upper sealing portion, a lower sealing portion, and a side sealing portion, respectively.
  • the pouch exterior member 300 may have a structure in which the outside of the receiving portions 310a and 310b facing the insertion portion 315, that is, the side sealing portion 350 is extended relatively long.
  • the pouch type secondary battery 100 accommodates the electrode assembly 200 by stacking the storage parts 310a and 310b, and the remaining sealing parts except the side of the elongated side sealing parts 350
  • the upper sealing part 320 and the lower sealing part 330 are sealed so that the electrolyte is injected through the side sealing part 350 and then sealed to seal the side sealing part 350 to a predetermined size
  • the structure of the pouch exterior member 300 not only facilitates the injection of the electrolytic solution but also overcomes the problem that the electrolytic solution overflows due to a mistake of the operator during the injection process.
  • the pouch exterior member 300 may be formed of a laminate sheet including a metal layer and a resin layer.
  • the laminate sheet may be an aluminum laminate sheet.
  • the pouch exterior member 300 includes a core portion made of a metal layer, a heat seal layer formed on the upper surface of the core portion, and an insulating layer formed on the lower surface of the core portion.
  • the thermally fusible layer functions as an adhesive layer using a modified polypropylene such as CPP (Casted Polypropylene) which is a polymer resin
  • the insulating layer may be formed of a resin material such as nylon or polyethylene terephthalate (PET) But the structure and material of the exterior material are not limited.
  • the pouch exterior member 300 is a unit sheet and is a deep-drawing type using a die and a punch. Through such compression molding of the aluminum laminate sheet, the receiving portions 310a and 310b can be simultaneously formed by one step have.
  • the insertion portion 315 and the triangular step portion 317 can be simultaneously formed by a single process.
  • the receiving portions 310a and 310b, the insertion portion 315, and the triangular step portion 317 can be simultaneously formed by a single process.
  • the depth t1 of the bottom edge a2 of the receiving portion 310a farther from the insertion portion 315 is equal to or more than half the thickness T of the electrode assembly 200
  • the depth t1 of the bottom edge b2 of the accommodating portion 310b farther from the insertion portion 315 is equal to or more than half of the thickness T of the electrode assembly 200.
  • the depth t1 of the bottom edges a2 and b2 may be ideal because there is no portion of the thickness T of the electrode assembly 200 remaining but it may be formed a little deeper have. Therefore, the depth t1 of the bottom edges a2 and b2 is set to be not less than 1/2 of the thickness T of the electrode assembly 200.
  • each of the receiving portions 310a and 310b has a bottom surface inclined.
  • the receptacles 310a and 310b are gradually deeper from the portions a1 and b1 corresponding to the middle width of the electrode assembly 200 toward the portions a2 and b2 corresponding to the edge of the electrode assembly 200.
  • the portions a1 and b1 corresponding to the middle width of the electrode assembly 200 are movable along the depth h of the insertion portion 315. [ The portions a1 and b1 corresponding to the middle width of the electrode assembly 200 approach the insertion portion 315 as the depth h of the insertion portion 315 becomes deeper. Conversely, as the depth h of the inserting portion 315 becomes shallower, portions a1 and b1 corresponding to the middle width of the electrode assembly 200 move away from the inserting portion 315.
  • the depth h of the insertion portion 315 can be determined in consideration of the material and the elongation rate of the pouch outer casing 300 and the depth h of the insertion portion 315 can be determined by the triangle step portion 317, And ultimately determines the final contour of the sealing area, which is a factor to be considered carefully.
  • the depth of the accommodating portions is conventionally about half of the thickness of the electrode assembly, and the bottom of the receiving portion is not inclined.
  • the receiving portions 310a and 310b of the pouch case 300 according to the present invention have a maximum depth of at least one half of the thickness T of the electrode assembly 200 and a minimum depth of 0, (A portion corresponding to the width of the electrode assembly 200) having the minimum depth from the one edge (the portion corresponding to the edge of the electrode assembly 200) having the maximum depth.
  • the pouch exterior member 300 of the present invention has the molding depth, the bottom surface shape, the presence of the insertion portion between the two receiving portions, and the triangular stepped portions at both ends of the insertion portion, different.
  • FIG. 8 is a cross-sectional view of a pouch type secondary battery manufacturing method using the pouch case of FIG. 6, which corresponds to the section VII-VII 'of FIG.
  • FIG. 9 is a top view of a pouch type secondary battery manufactured by the method shown in FIG.
  • FIG. 8A is a cross-sectional view of the pouch outer casing 300 after being formed, and is moved upwardly of the insertion portion 315 in order to mount the electrode assembly 200.
  • FIG. 8 (c) and FIG. 8 (d) in a state where the side surface 230 of the electrode assembly 200 is inserted into the inserting portion 315 of the pouch outer casing 300, as shown in FIG. 8 (b)
  • the pouch exterior member 300 on the side of both the receptacles 310a and 310b is folded up so that the receptacles 310a and 310b are held on both sides of the electrode assembly 200, (240 in Fig. 5).
  • the side surface 230 of the electrode assembly 200 is inserted into the insertion portion 320 such that the positive electrode lead 210 and the negative electrode lead 220 correspond to the upper sealing portion 320 and the lower sealing portion 330,
  • the upper sealing part 320 and the lower sealing part 330 and the side sealing part 350 contact the upper and lower sealing parts 315 and 315, respectively.
  • the pouch case 300 is folded up with the electrode assembly 200 fitted in the insertion portion 315 Therefore, the side surface 230 of the electrode assembly 200 can be wrapped without unnecessary space, and the bending angle is not greater than that of the prior art, so that an unreasonable bending force is not applied.
  • the interval between the inserting portion 315 and the accommodating portions 310a and 310b is a flat section, and the accommodating portions 310a and 310b extend from the portions a1 and b1 corresponding to the middle width of the electrode assembly 200,
  • the wide surface 240 of the electrode assembly 200 is also fit to the side surface 230 of the electrode assembly 200 while the electrode assembly 200 is wrapped around the electrode assembly 200, You can cover the corners of the other side.
  • the pouch outer cover 300 according to the present invention is flexible and can be easily folded up. Since there is no bent portion requiring a large force, it can be firmly sealed at a later stage without wrinkles or the like.
  • the folded portion bent by one folding line which is the center portion between the two compartments, is constituted by an excess portion in the middle portion of the side surface of the electrode assembly.
  • 315 there is no unnecessary portion on the side surface 230 of the electrode assembly 200 to be inserted therein.
  • the opposite side surfaces of the side surface 230 of the electrode assembly 200 to be inserted into the inserting portion 315 can be accommodated in a perfect fit through the bottom surface inclination structure of the receiving portions 310a and 310b.
  • the present invention can provide a pouch-type secondary battery which can be used for a high-capacity high-density electric vehicle battery and a large-capacity secondary battery, and a method of manufacturing the same.
  • the side sealing portion 350 is thermally fused by injecting an electrolyte into the gap between the side sealing portions 350 and then sealing the side sealing portion 350 with a predetermined Followed by cutting to length.
  • the depth of the triangular step 317 gradually decreases toward the end of the inserting portion 315. Therefore, after the sealing portions 320, 330, 230 are not formed with protrusions.
  • the upper and lower sealing parts 320 and 330 are sealed up to the sealing (S) after the heat sealing.
  • protrusions are formed by pressing the pouch exterior material at the upper and lower ends, But rather the indentation is formed as indicated by " B ".
  • the shape of the triangular step 317 determines the final shape of the sealing part, so that the shape of the triangular step 317 affects the shape and indentation of the recess. Since the length of the triangular step 317 and the depth h of the insertion portion 315 affect the shape of the triangular step 317, the shape of the indent portion B can be determined through the adjustment of these factors .
  • the bottom surface of the pouch type secondary battery can be manufactured in a flat shape.
  • the triangular step 317 is formed at both ends of the inserting portion 315, the protrusions generated during sealing are not protruded from the bottom surface of the pouch type secondary battery.
  • the present invention can increase the capacity of the electrode assembly included in the pouch type secondary battery by eliminating unnecessary spaces such as the folding portion of the pouch outer case and the protrusion when sealing.
  • the pouch type secondary battery manufactured using the pouch type outer sheath according to the present invention no burr-shaped protrusions are formed, so that dead space is not formed, and the energy density of the module / pack including the pouch type secondary battery is remarkably increased . Further, the protrusions are removed, and the assembling property of the module is facilitated.
  • the efficiency of the assembling process of the module / pack including the pouch type secondary battery according to the present invention can be remarkably increased because no interference or the like between neighboring components or the like which may be caused by the protrusion like the conventional one occurs.
  • the flat bottom surface is very advantageous for edge cooling type cooling.
  • the pouch type secondary battery 100 has been described with reference to the electrode assembly 200 in which the positive electrode lead 210 and the negative electrode lead 220 are protruded from each other but the positive electrode lead and the negative electrode lead protrude to the same side
  • the electrode assembly can also be manufactured as a pouch-type secondary battery using the pouch case according to the present invention.
  • the pouch type secondary battery 100 as shown in FIG. 9 may be stacked to form a module / pack.
  • 10 is a schematic cross-sectional view illustrating the configuration of a battery module including a pouch type secondary battery according to the present invention.
  • a plurality of pouch-type secondary batteries 100 may be assembled so that one surface, which is not sealed, is positioned at the bottom and attached to the upper surface of the cooling plate 600 have.
  • the pouch-type secondary battery 100 may be configured such that the surface corresponding to the left side surface of the pouch type secondary battery 100 is located at the lower side in the configuration of FIG. 9, so that the surface of the pouch type secondary battery 100 is seated on the upper surface of the cooling plate 600.
  • the pouch type secondary battery 100 can be completely brought into close contact with the cooling plate 600 and the top surface structure of the cooling plate 600 can be simplified .
  • the electrode assembly in the pouch type secondary battery 100 and the cooling plate 600 can be positioned very close to each other. That is, since there is no unnecessary protrusion on the unsealed surface, the cooling plate 600 and the pouch type secondary battery 100 can be brought into close contact with each other. Therefore, the volume of the entire battery module 500 can be reduced to increase the energy density.
  • the contact area between the pouch type secondary battery 100 and the cooling plate 600 can be maximized and heat transfer can be increased. Accordingly, the heat generated in the electrode assembly inside the pouch-type secondary battery 100 can be more quickly and smoothly transferred to the cooling plate 600, thereby improving the cooling efficiency.
  • FIG. 11 is a photograph of a pouch exterior member manufactured according to the experimental example of the present invention.
  • the pouch exterior member 300 is turned upside down so that the receiving portions 310a and 310b are downward, and the bottom surface of the pouch exterior member 300 is seen.
  • the pouch case 300 has an insertion portion 315 having a width corresponding to the thickness of the electrode assembly, which is formed at the center of one unit of the sheet-like pouch outer casing,
  • the accommodating portions 310a and 310b gradually becoming deeper toward the corresponding portions are symmetrically formed on both sides of the inserting portion 315.
  • a triangular step portion 317 is formed at both ends of the insertion portion 315 so that the depth gradually decreases toward the end. As can be seen from FIG.
  • the foam can be formed without tearing or tearing in the manufacturing process of the pouch outer cover 300 according to the present invention. It has been confirmed that the receiving parts 310a and 310b, the insertion part 315 and the triangular step part 317 are formed as desired and the forming can be performed without any distortion or concentration of stress.
  • FIG. 12 is a photograph of a pouch type secondary battery manufactured by using the pouch case 300 of FIG.
  • the upper and lower sealing portions are slightly protruded by p1 and p2, respectively, as compared with the side corresponding to the inserting portion 315 of the pouch case 300 of Fig. 11, Compared to p3, which is very small.
  • the degree of protrusion can be removed by adjusting the depth of the insertion portion 315 of the pouch exterior member 300 as described above.
  • the protrusion can be removed by adjusting the depth of the insertion portion 315 by a protruding amount.
  • FIG. 14 is a photograph of a pouch-type secondary battery manufactured using the pouch case according to another experimental example of the present invention.
  • the depth of the inserting portion 315 is adjusted so as to be deeper by the protrusion amount of p1 to p2, and another pouch outer cover material is manufactured.
  • the pouch type secondary battery is manufactured.
  • the lower sealing portion is located further inside than the predetermined distance p4 with respect to the side corresponding to the inserting portion 315 of the pouch exterior member 300.
  • FIG. 15 is a bottom view of the pouch type secondary battery according to the experimental example of the present invention (inserted into the insertion portion 315 of the pouch exterior member 300), and the module / pack cooling structure and the assembling process can be simplified.
  • FIG. 16 is a photograph of the bottom surface of the pouch type secondary battery according to the related art. 15 and FIG. 16, it is possible to confirm that the bottom surface of the pouch type secondary battery is flattened in the case of the present invention, and the adhesion is improved in the edge cooling type module, thereby improving the cooling performance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

L'invention concerne un matériau de gaine de poche, une batterie secondaire de type poche l'utilisant et un procédé de fabrication associé, un ensemble d'électrode pouvant être facilement monté dans une position désignée sur une portion de contenant, la batterie étant intégrée de sorte que, en réduisant au minimum une portion d'étanchéité qui entre en contact avec l'atmosphère, les caractéristiques de vie de celle-ci puissent être améliorées, qu'il soit possible d'empêcher le matériau de gaine de poche de se fracturer pendant un processus d'assemblage et que la densité d'énergie de cellule puisse être améliorée. Un matériau de gaine de poche de batterie secondaire selon la présente invention est un matériau de gaine de poche de type feuille unitaire utilisé pour encapsuler un ensemble d'électrode et comprend : une portion d'insertion qui est formée au centre du matériau de gaine de poche et qui a une largeur correspondant à l'épaisseur de l'ensemble d'électrode ; des portions de contenant symétriquement formées sur les deux côtés de la portion d'insertion, respectivement, de sorte que la profondeur de celles-ci augmente progressivement, d'une partie correspondant au milieu de la largeur de l'ensemble d'électrode vers une partie correspondant à une périphérie de l'ensemble d'électrode ; et des portions étagées triangulaires formées sur les deux extrémités des portions d'insertion, respectivement, de sorte que la profondeur de celles-ci diminue progressivement vers leurs extrémités.
PCT/KR2018/007813 2017-07-20 2018-07-10 Matériau de gaine de poche de batterie secondaire, batterie secondaire de type poche l'utilisant et son procédé de fabrication Ceased WO2019017637A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN201880004185.XA CN110062964B (zh) 2017-07-20 2018-07-10 二次电池的袋型外部材料、采用其的袋型二次电池及其制造方法
PL18834580T PL3561899T3 (pl) 2017-07-20 2018-07-10 Materiał zewnętrzny saszetki baterii akumulatorowej, bateria akumulatorowa typu saszetkowego, w której go wykorzystano i sposób jej wytwarzania
JP2019529972A JP6734482B2 (ja) 2017-07-20 2018-07-10 二次電池用パウチ外装材、これを用いたパウチ型二次電池及びこの製造方法
EP18834580.5A EP3561899B1 (fr) 2017-07-20 2018-07-10 Matériau de gaine de poche de batterie secondaire, batterie secondaire de type poche l'utilisant et son procédé de fabrication
US16/334,509 US11239515B2 (en) 2017-07-20 2018-07-10 Pouch exterior material for secondary battery, pouch type secondary battery using the same, and method of manufacturing the same
US17/547,657 US12057545B2 (en) 2017-07-20 2021-12-10 Pouch exterior material for secondary battery, pouch type secondary battery using the same, and method of manufacturing the same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2017-0092152 2017-07-20
KR20170092152 2017-07-20
KR10-2018-0075766 2018-06-29
KR1020180075766A KR102109926B1 (ko) 2017-07-20 2018-06-29 이차전지용 파우치 외장재, 이를 이용한 파우치형 이차전지 및 그 제조 방법

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US16/334,509 A-371-Of-International US11239515B2 (en) 2017-07-20 2018-07-10 Pouch exterior material for secondary battery, pouch type secondary battery using the same, and method of manufacturing the same
US17/547,657 Continuation US12057545B2 (en) 2017-07-20 2021-12-10 Pouch exterior material for secondary battery, pouch type secondary battery using the same, and method of manufacturing the same

Publications (1)

Publication Number Publication Date
WO2019017637A1 true WO2019017637A1 (fr) 2019-01-24

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3382771A4 (fr) * 2016-09-12 2019-04-24 LG Chem, Ltd. Matériau extérieur de poche de batterie secondaire, batterie secondaire de type poche l'utilisant, et son procédé de fabrication
US20200343604A1 (en) * 2019-04-26 2020-10-29 Sk Innovation Co., Ltd. Battery Module
EP3836283A3 (fr) * 2019-09-30 2021-08-11 SK Innovation Co., Ltd. Boîtier en sachet souple, batterie secondaire de type en sachet souple et procédé de fabrication associé
CN113348575A (zh) * 2019-06-07 2021-09-03 株式会社Lg新能源 制造二次电池的设备和方法
CN114424387A (zh) * 2019-12-17 2022-04-29 株式会社Lg新能源 二次电池的壳体和二次电池
EP3958343A4 (fr) * 2019-05-31 2022-06-29 LG Energy Solution, Ltd. Compartiment de batterie pour batterie secondaire et batterie secondaire de type poche
CN115149161A (zh) * 2021-03-30 2022-10-04 株式会社Lg新能源 袋型二次电池和具有该袋型二次电池的电池模块
CN115917843A (zh) * 2020-08-19 2023-04-04 株式会社 Lg新能源 软包型电池壳体及软包型二次电池
US12308392B2 (en) 2019-04-16 2025-05-20 Lg Energy Solution, Ltd. Apparatus and method for manufacturing secondary battery

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100895202B1 (ko) * 2006-04-17 2009-05-06 주식회사 엘지화학 파우치형 전지
KR101253671B1 (ko) * 2010-11-12 2013-04-11 주식회사 이아이지 리튬 이차전지 및 그 제조방법
JP2013206691A (ja) * 2012-03-28 2013-10-07 Nec Corp 二次電池の製造方法および製造装置
KR20160019314A (ko) * 2014-08-11 2016-02-19 삼성에스디아이 주식회사 커브드 이차 전지 및 이의 제조 방법
KR20170052061A (ko) * 2015-11-03 2017-05-12 주식회사 엘지화학 이차 전지용 파우치 외장재
KR20170092152A (ko) 2014-12-02 2017-08-10 로레알 아이 라이너를 포장 및 도포하기 위한 디바이스
KR20180075766A (ko) 2016-12-26 2018-07-05 계양전기 주식회사 킥보드의 핸들프레임 고정장치

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100895202B1 (ko) * 2006-04-17 2009-05-06 주식회사 엘지화학 파우치형 전지
KR101253671B1 (ko) * 2010-11-12 2013-04-11 주식회사 이아이지 리튬 이차전지 및 그 제조방법
JP2013206691A (ja) * 2012-03-28 2013-10-07 Nec Corp 二次電池の製造方法および製造装置
KR20160019314A (ko) * 2014-08-11 2016-02-19 삼성에스디아이 주식회사 커브드 이차 전지 및 이의 제조 방법
KR20170092152A (ko) 2014-12-02 2017-08-10 로레알 아이 라이너를 포장 및 도포하기 위한 디바이스
KR20170052061A (ko) * 2015-11-03 2017-05-12 주식회사 엘지화학 이차 전지용 파우치 외장재
KR20180075766A (ko) 2016-12-26 2018-07-05 계양전기 주식회사 킥보드의 핸들프레임 고정장치

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3561899A4

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10892448B2 (en) 2016-09-12 2021-01-12 Lg Chem, Ltd. Pouch exterior for secondary battery, pouch-type secondary battery using the pouch exterior, and method of manufacturing the pouch-type secondary battery
EP3382771A4 (fr) * 2016-09-12 2019-04-24 LG Chem, Ltd. Matériau extérieur de poche de batterie secondaire, batterie secondaire de type poche l'utilisant, et son procédé de fabrication
US11935997B2 (en) 2016-09-12 2024-03-19 Lg Energy Solution, Ltd. Pouch exterior for secondary battery, pouch-type secondary battery using the pouch exterior, and method of manufacturing the pouch-type secondary battery
US12308392B2 (en) 2019-04-16 2025-05-20 Lg Energy Solution, Ltd. Apparatus and method for manufacturing secondary battery
CN111864132B (zh) * 2019-04-26 2024-02-02 Sk新能源株式会社 电池模块
US20200343604A1 (en) * 2019-04-26 2020-10-29 Sk Innovation Co., Ltd. Battery Module
CN111864132A (zh) * 2019-04-26 2020-10-30 Sk新技术株式会社 电池模块
US11984567B2 (en) 2019-04-26 2024-05-14 Sk On Co., Ltd. Battery module
US12237517B2 (en) 2019-05-31 2025-02-25 Lg Energy Solution, Ltd. Battery case for secondary battery and pouch type secondary battery
EP3958343A4 (fr) * 2019-05-31 2022-06-29 LG Energy Solution, Ltd. Compartiment de batterie pour batterie secondaire et batterie secondaire de type poche
JP2022515783A (ja) * 2019-06-07 2022-02-22 エルジー エナジー ソリューション リミテッド 二次電池の製造装置及び方法
CN113348575A (zh) * 2019-06-07 2021-09-03 株式会社Lg新能源 制造二次电池的设备和方法
JP7242119B6 (ja) 2019-06-07 2023-03-31 エルジー エナジー ソリューション リミテッド 二次電池の製造装置及び方法
JP7242119B2 (ja) 2019-06-07 2023-03-20 エルジー エナジー ソリューション リミテッド 二次電池の製造装置及び方法
US11817559B2 (en) 2019-06-07 2023-11-14 Lg Energy Solution, Ltd. Apparatus and method for manufacturing secondary battery
CN113348575B (zh) * 2019-06-07 2023-12-22 株式会社Lg新能源 制造二次电池的设备和方法
EP3836283A3 (fr) * 2019-09-30 2021-08-11 SK Innovation Co., Ltd. Boîtier en sachet souple, batterie secondaire de type en sachet souple et procédé de fabrication associé
CN114424387A (zh) * 2019-12-17 2022-04-29 株式会社Lg新能源 二次电池的壳体和二次电池
US12444793B2 (en) 2019-12-17 2025-10-14 Lg Energy Solution, Ltd. Secondary battery and secondary battery case
CN115917843A (zh) * 2020-08-19 2023-04-04 株式会社 Lg新能源 软包型电池壳体及软包型二次电池
EP4068445A3 (fr) * 2021-03-30 2023-05-24 LG Energy Solution, Ltd. Batterie secondaire de type à sachet et module de batterie
CN115149161A (zh) * 2021-03-30 2022-10-04 株式会社Lg新能源 袋型二次电池和具有该袋型二次电池的电池模块
CN115149161B (zh) * 2021-03-30 2024-10-18 株式会社Lg新能源 袋型二次电池和具有该袋型二次电池的电池模块
US12482881B2 (en) 2021-03-30 2025-11-25 Lg Energy Solution, Ltd. Pouch-type secondary battery and battery module having the same

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