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WO2019050180A1 - Batterie secondaire - Google Patents

Batterie secondaire Download PDF

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Publication number
WO2019050180A1
WO2019050180A1 PCT/KR2018/009257 KR2018009257W WO2019050180A1 WO 2019050180 A1 WO2019050180 A1 WO 2019050180A1 KR 2018009257 W KR2018009257 W KR 2018009257W WO 2019050180 A1 WO2019050180 A1 WO 2019050180A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
electrode
case
terminal
bus bar
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/KR2018/009257
Other languages
English (en)
Korean (ko)
Inventor
장명재
변상원
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.)
Samsung SDI Co Ltd
Original Assignee
Samsung SDI Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung SDI Co Ltd filed Critical Samsung SDI Co Ltd
Publication of WO2019050180A1 publication Critical patent/WO2019050180A1/fr
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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/562—Terminals characterised by the material
    • 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 secondary battery.
  • a secondary battery is a battery capable of charging and discharging unlike a primary battery which can not be charged.
  • the secondary battery is used in a portable electronic device such as a mobile phone and a camcorder , And a large-capacity battery of a battery pack unit having dozens of battery packs is widely used as a power source for driving a motor such as a hybrid vehicle.
  • the secondary battery includes an electrode assembly and an electrolyte formed between a positive electrode plate and a negative electrode plate via a separator, which is an insulator, and a cap plate provided in the case.
  • a typical example of the electrode assembly is a jelly-roll type.
  • the electrode assembly of the jelly roll type uses a method in which a solid portion is protruded to the upper side of the electrode assembly and a collector is connected to the upper side.
  • the position of the electrode terminals of the general-purpose secondary battery is located on the upper surface, and the position of the electrode terminals may be located in the lateral direction or in the left-right direction depending on the space constraint or the coupling structure with the electronic device.
  • the present invention provides a secondary battery capable of reducing space in a height direction by moving a bus bar connecting portion electrically connected to an electrode terminal portion to a side surface of a case.
  • the secondary battery according to the present invention includes an electrode assembly including a first electrode plate, a second electrode plate, and a separator formed between the first electrode plate and the second electrode plate; A case having the electrode assembly inserted therein and having a bottom surface and a side extending upward from the bottom surface; A cap plate coupled to an upper portion of the case; A first electrode terminal portion electrically connected to the first electrode plate and formed through the cap plate; And a first bus bar connection part electrically connected to the first electrode terminal part and extending from a top of the cap plate to a side of the case.
  • An insulating portion may be formed between the first bus bar connecting portion, the cap plate, and the side surface of the case.
  • the first electrode terminal portion includes a first current collector electrically connected to the first current collector plate; A first terminal coupled to the first current collector and formed through the cap plate; A terminal plate coupled to an upper portion of the first terminal; And an insulating member formed between the terminal plate and the cap plate.
  • first bus bar connection portion is electrically connected to the terminal plate and extends in the horizontal direction; And a bent portion bent from the extended portion and extending to a lower portion of the case, the bent portion being formed in parallel with the side surface of the case.
  • a second bus bar connection may be further formed between the second bus bar and the side of the case.
  • the cap plate may further include a shorting plate installed on a cap plate disposed below the terminal plate and shorting the cap plate and the terminal plate when the pressure inside the case is greater than a predetermined pressure.
  • the side surface of the case includes a pair of long side surfaces and a pair of short side surfaces connecting the pair of long side surfaces and narrower in area than the pair of long side surfaces, And may be formed parallel to the short side of the pair.
  • the thickness of the pair of short side surfaces may be greater than the thickness of the pair of long side surfaces.
  • the secondary battery according to an embodiment of the present invention is formed by extending the bus bar connecting portion, which is electrically connected to the first terminal and is connected to the bus bar, from the cap plate to the side of the case, thereby reducing the height of the secondary battery, .
  • FIG. 1 is a perspective view illustrating a secondary battery according to an embodiment of the present invention.
  • Fig. 2 is a cross-sectional view showing the line I-I in Fig. 1.
  • FIG 3 is a plan view showing a case in a secondary battery according to an embodiment of the present invention.
  • FIG. 4 is an exploded perspective view showing a coupling relation between the first electrode terminal portion and the bus bar connection portion.
  • FIG. 5 is a perspective view illustrating a secondary battery according to another embodiment of the present invention.
  • FIG. 1 is a perspective view illustrating a secondary battery according to an embodiment of the present invention.
  • Fig. 2 is a cross-sectional view showing the line I-I in Fig. 1.
  • Fig. 3 is a plan view showing a case in a secondary battery according to an embodiment of the present invention.
  • 4 is an exploded perspective view showing a coupling relation between the first electrode terminal portion and the bus bar connection portion.
  • a secondary battery 100 includes an electrode assembly 110, a case 120, a first electrode terminal 130, a second electrode terminal 140, A cap assembly 150, and a bus bar connection 160.
  • FIG. 1 a secondary battery 100 according to an embodiment of the present invention includes an electrode assembly 110, a case 120, a first electrode terminal 130, a second electrode terminal 140, A cap assembly 150, and a bus bar connection 160.
  • the electrode assembly 110 is formed by winding or stacking a stack of a first electrode plate 111, a separator 113, and a second electrode plate 112 which are formed in a thin plate or film shape.
  • the first electrode plate 111 can operate as a cathode
  • the second electrode plate 112 can operate as an anode.
  • the first electrode plate 111 and the second electrode plate 112 may be disposed at different polarities from one another according to the selection of a person skilled in the art.
  • the first electrode plate 111 is formed by applying a first electrode active material such as graphite or carbon to a first electrode current collector formed of a metal foil such as copper or nickel, Electrode uncoated portion 111a.
  • the first electrode non-holding portion 111a protrudes to one side of the electrode assembly 110.
  • the first electrode non-holding portion 111a provides a path for current flow between the first electrode plate 111 and the first electrode plate.
  • the second electrode plate 112 is formed by applying a second electrode active material such as a transition metal oxide to a second electrode current collector formed of a metal foil such as aluminum, And a non-printed portion 112a.
  • the second electrode uncoated portion 112a protrudes to the other side of the electrode assembly 110.
  • the second electrode non-holding portion 112a is a path for current flow between the second electrode plate 112 and the outside of the second electrode plate.
  • the separator 113 is positioned between the first electrode plate 111 and the second electrode plate 112 to prevent short-circuiting and enable movement of lithium ions.
  • the separator 113 may be made of polyethylene, polypropylene or a composite film of polyethylene and polypropylene.
  • the first electrode assembly 110 is housed in the case 120 together with the electrolyte solution.
  • the electrolyte may be a lithium salt such as LiPF 6 or LiBF 4 in an organic solvent such as EC, PC, DEC, EMC and DMC.
  • the electrolytic solution may be liquid, solid or gel-like.
  • the case 120 is formed of a conductive metal such as aluminum, aluminum alloy, or nickel-plated steel, and has a substantially hexahedron shape with an opening through which the electrode assembly 110 can be inserted. 2, the peripheral portion of the cap assembly 150 is substantially opened, although the opening portion is not shown because the case 120 and the cap assembly 150 are shown in a coupled state.
  • the case 120 may function as one polarity, for example, an anode.
  • the inner surface of the case 120 is insulated and insulated from the electrode assembly 110.
  • the case 120 includes a bottom surface 121 and four side surfaces 123 and 124 extending upward from the bottom surface 121.
  • the side surfaces 123 and 124 may include a pair of long side surfaces 123 and a pair of short side surfaces 124.
  • the pair of long side surfaces 123 refers to a side surface having a relatively large cross-sectional area among the four side surfaces 122.
  • the bus bar 170 may be coupled to one of the four side surfaces 123 and 124 by welding and the side surface of the portion where the bus bar 170 is coupled may be thicker than the other side surface .
  • the bus bar 170 may be coupled to the short side 124, and the thickness t1 of the pair of short side surfaces 124 may be greater than the thickness t2 of the pair of long side surfaces 123 (T1 > t2).
  • the thickness of the short side surface 124 is greater than the thickness t3 of the bottom surface 121 (t1 > t3).
  • the thickness of the short side surface 124 is greater than about 2 mm. This is to ensure safety when the bus bar 170 is directly coupled to the short side 124 of the case 120. [ That is, if the thickness of the short side 124 is less than 2 mm when the bus bar 170 is directly welded to the short side 124 of the case 120, the case 120 may be damaged during welding.
  • the first electrode terminal part 130 is formed of a conductive material such as copper or nickel, and is electrically connected to the first electrode plate 111.
  • the first electrode terminal part 130 includes a first current collector 131, a first terminal 132, a terminal plate 133, and an insulating member 134.
  • the first current collector 131 has a first connection part 131a connected to the first electrode non-conductive part 111a and a second connection part 131b bent from the end of the first connection part 131a, And a first extension portion 131b extending from the first extension portion 131b.
  • the first connection part 131a is formed on one side of the electrode assembly 110 and is formed in the form of a plate substantially in contact with the first electrode non-conductive part 111a.
  • the first electrode non-holding portion 111a may be welded to the first connecting portion 131a.
  • the first extension part 131b is bent and extended at an end of the first connection part 131a and is disposed between the upper part of the electrode assembly 110 and the lower part of the cap assembly 150 and is formed in a plate shape .
  • a first terminal hole 131c is formed on one side of the first extension part 131b. The first terminal 132 is inserted into the first terminal hole 131c.
  • the first terminal 132 is formed in a column shape and penetrates through a cap plate 151 to be described later, and protrudes and extends for a predetermined length to an upper portion of the cap plate 151.
  • a flange 132a is formed below the first terminal 132 to prevent the first terminal 132 from being detached from the cap plate 151. [ A region located below the flange 132a at the first terminal 132 is fitted in the first terminal hole 131c.
  • the terminal plate 133 is coupled to the first terminal 132 protruding upward from the cap plate 151.
  • the terminal plate 134 is welded to the first terminal 132 to fix the first terminal 122 to the cap plate 151.
  • the boundary region between the first terminal 132 and the terminal plate 133 is welded to each other.
  • a laser beam is irradiated to a boundary region between the first terminal 132 and the terminal plate 133 exposed above the cap plate 151, and the boundary regions are melted and cooled and welded to each other.
  • an insulating member 134 is formed between the terminal plate 133 and the cap plate 151 to insulate the first terminal 132 from the cap plate 151.
  • a through hole 134a is formed in the insulating member 134 at a position corresponding to the shorting plate 155 so that the shorting plate 155 can be short-circuited to the terminal plate 133.
  • the second electrode terminal part 140 is formed of a conductive material such as aluminum and is electrically connected to the second electrode plate 112.
  • the second electrode terminal part 140 includes a second current collector 141 and a second terminal 142.
  • the second current collector 141 has a second connection portion 141a connected to the second electrode non-conductive portion 112a and a second connection portion 141b bent from the end of the second connection portion 141a, And a second extension 141b extending from the second extension 141b.
  • the second connection part 141a is formed on the other side of the electrode assembly 110 and is formed in a plate shape substantially in contact with the second electrode non-conductive part 112a.
  • the second electrode non-holding portion 112a may be welded to the second connecting portion 141a.
  • the second extension portion 141b is bent and extended at an end of the second connection portion 141a and is disposed between the upper portion of the electrode assembly 110 and the lower portion of the cap assembly 150 and is formed in a plate shape .
  • a second terminal hole 141c is formed on one side of the second extension 141b. And the second terminal portion 142 is inserted into the second terminal hole 141c.
  • a fuse hole 141d is formed on the other side of the second extension 141b. The fuse hole 141d is spaced apart from the second terminal hole 141c and is located at a portion adjacent to the second connection portion 141a. The fuse hole 141d functions as a fuse to cut off the flow of current by melting and cutting a region where the fuse hole 141d is formed due to heat generated when a short circuit occurs in the secondary battery and a large current flows.
  • the second terminal 142 is formed in a column shape and is electrically connected to the second current collector 141.
  • a flange 142a is formed under the second terminal 142 so that the second terminal 142 does not come off from the second extension 141b.
  • the second terminal 142 is fitted in the second terminal hole 141c.
  • the upper portion of the second terminal 142 is electrically connected to the lower surface of the cap plate 151 and does not extend upwardly through the cap plate 151.
  • the second terminal 142 may be electrically connected to the lower surface of the cap plate 151 by welding. Accordingly, the cap plate 151 has the same polarity (positive polarity) as the second terminal 142.
  • the case 120 to which the cap plate 151 is coupled also has the same polarity (anode) as the second terminal 142, the anode bus bar 172 or the second bus bar 172 You will be able to connect to anywhere.
  • the second terminal 142 does not protrude to the outside of the cap plate 151, the height of the secondary battery 100 can be reduced. 1, since the case 120 electrically connected to the second terminal 142 has a positive electrode, the second bus bar 172 is connected to the short side 124 of the case 120 The height of the secondary battery 100 can be reduced.
  • the cap assembly 150 is coupled to the upper portion of the case 120.
  • the cap assembly 150 includes a cap plate 151, a gasket 152, a cap 153, a safety vent 154, and a shorting plate 155.
  • the cap plate 151 seals the upper opening of the case 120 and may be formed of the same material as the case 120.
  • the cap plate 151 may be coupled to the case 120 by laser welding.
  • the cap plate 151 is formed with an electrolyte injection hole 151a for injecting an electrolyte solution and a short hole 151c in which a vent hole 151b and a shorting plate 155 for forming a safety vent 154 are formed.
  • the gasket 152 is formed of an insulating material between the first terminal 132 and the cap plate 151 to seal the gap between the first terminal 132 and the cap plate 151. Specifically, the gasket 152 extends downward through the cap plate 151 and is formed to cover the flange portion 132a of the first terminal 132. The gasket 152 prevents external moisture from penetrating the interior of the secondary battery 100 or prevents the electrolyte contained in the secondary battery 100 from flowing out. The gasket 152 also serves to insulate the first terminal 132 from the cap plate 151.
  • the cap 153 seals the electrolyte injection hole 151a of the cap plate 151.
  • the safety vent 154 is installed in the vent hole 151b of the cap plate 151 and is provided with a notch .
  • the shorting plate 155 is disposed in the shorting hole 151c of the cap plate 151 and is located between the insulating member 134 of the second terminal unit 130 and the cap plate 151.
  • the shorting plate 155 may include an inverting plate including a downwardly convex round portion and a rim portion fixed to the cap plate 151. Therefore, the shorting plate 155 is electrically connected to the cap plate 151.
  • the shorting plate 155 is inverted and protrudes upward to contact the terminal plate 133 to cause a short circuit.
  • the shorting plate 155 is reversed when the pressure inside the case 120 is larger than the set pressure, thereby shorting the cap plate 151 and the first terminal 132. If the short circuit is caused, a large current flows and heat is generated. At this time, the region where the fuse hole 141d is formed is melted and cut to function as a fuse, thereby improving the safety of the secondary battery 100.
  • the bus bar connecting part 160 is electrically connected to the first electrode terminal part 130 and is connected to the bus bar 170.
  • the bus bar connecting portion 160 includes a bent portion 162 bent from the extending portion 161 and the extending portion 161.
  • the bus bar connecting portion 160 may be defined as a cathode bus bar connecting portion 160 or a first bus bar connecting portion 160 since the bus bar connecting portion 160 is electrically connected to the first collector plate 111,
  • the extended portion 161 is electrically connected to the terminal plate 133 and extends horizontally from the terminal plate 133.
  • the extended portion 161 is parallel to the cap plate 151 and extends toward the outside of the cap plate 151. That is, the extension portion 161 is coupled to the outside of the terminal plate 133 and is formed in a flat plate shape so as to form the same surface as the terminal plate 133.
  • the extended portion 161 can be electrically connected to the terminal plate 133 by welding the surface on which the terminal plate 133 and the extended portion 161 contact.
  • a portion of the extension 161 may extend over the top of the insulating member 134.
  • the bent portion 162 is bent from the extended portion 161 and extends to the lower portion of the case 120.
  • the bent portion 162 is formed parallel to the short side surface 124 of the case 120.
  • a bus bar 170 may be connected to the bent portion 162.
  • the bus bar 170 connected to the bent portion 162 may be defined as a negative bus bar 171 or a first bus bar 171. Since the case 120 is electrically connected to the second electrode terminal part 140, the anode bus bar 172 or the second bus bar 172 is directly connected to the short side 124 of the case 120 Can be connected.
  • the bus bar 170 may form a single battery pack by connecting a plurality of secondary batteries to each other in series or in parallel.
  • the bus bar 170 may be welded to the bus bar connecting part 160 and the short side 124 of the case 120, respectively. Therefore, the bus bar 170 is formed parallel to the short side surface 124 of the case 120.
  • An insulating portion 165 is formed between the first bus bar connecting portion 160 and the end surface 124 of the cap plate 151 and the case 120 so that the first bus bar connecting portion 160, The cap plate 151 and the case 120 are insulated.
  • the insulating portion 165 is located between the extension portion 161 and the cap plate 151 and between the bent portion 162 and the short side surface 124 of the case 120.
  • the insulating portion 165 is made of an insulating material.
  • the secondary battery 100 includes the bus bar connecting portion 160 electrically connected to the first terminal 132 from the cap plate 151 to the side surface 124 of the case 120
  • the height of the secondary battery 100 can be reduced and the space in the height direction can be reduced.
  • the electrode terminal is to be formed on the side of the case (i.e., the structure in which the cap plate is moved to the side of the case), it is difficult to form a structure such as a safety vent and a short- There was a case.
  • the safety vent 154 and the shorting plate 155 may be connected to the cap plate (not shown) by extending the bus bar connecting portion 160 electrically connected to the first terminal 132 to the side surface 124 of the case 120.
  • 151 and the first terminal 132 is located on the side surface 124 of the case 120. In this case,
  • FIG. 5 is a perspective view illustrating a secondary battery according to another embodiment of the present invention.
  • the secondary battery 200 shown in FIG. 5 is the same as the secondary battery 100 shown in FIG. 1 except that the second bus bar connecting portion 260 is further formed.
  • the second bus bar 172 of the rechargeable battery 200 is not directly connected to the case 120 but includes a separate second bus bar connection part 260, Lt; / RTI >
  • the second bus bar connection part 260 is formed in a substantially rectangular plate shape and is electrically connected to the short side surface 124 of the case 120. Since the second electrode terminal portion 140 is electrically connected to the cap plate 151 and the case 120, the second bus bar connecting portion 260 connected to the short side surface 124 of the case 120 And has the same polarity as the second electrode terminal portion 140, that is, an anode. Accordingly, the second bus bar connecting part 260 may be referred to as a positive bus bar connecting part.
  • a second bus bar 172 is connected to the second bus bar connection part 260.
  • the second bus bar connecting portion 260 is formed on the short side 124 of the case 120 as described above, the short side surface 124 of the case 120 is divided into the long side surface 123 and the bottom surface 121, It is not necessary to form it thick.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne une batterie secondaire qui a un espace réduit dans la direction de la hauteur au moyen d'un déplacement d'une partie de connexion de barre omnibus, qui est électroconnectée à une partie de borne d'électrode, au côté latéral d'un boîtier. Par exemple, l'invention concerne une batterie secondaire comprenant : un ensemble d'électrodes qui comprend une première plaque d'électrode, une seconde plaque d'électrode et un séparateur formé entre la première plaque d'électrode et la seconde plaque d'électrode ; un boîtier dans lequel l'ensemble d'électrodes est inséré et qui a une surface de fond et une surface latérale s'étendant vers le haut à partir de la surface de fond ; une plaque de capuchon qui est couplée à la partie supérieure du boîtier ; une première partie de borne d'électrode qui est électroconnectée à la première plaque d'électrode et est formée à travers la plaque de capuchon ; et une première partie de connexion de barre omnibus qui est électroconnectée à la première partie de borne d'électrode et s'étend de la partie supérieure de la plaque de capuchon à la surface latérale du boîtier.
PCT/KR2018/009257 2017-09-07 2018-08-13 Batterie secondaire Ceased WO2019050180A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2017-0114758 2017-09-07
KR1020170114758A KR102425799B1 (ko) 2017-09-07 2017-09-07 이차 전지

Publications (1)

Publication Number Publication Date
WO2019050180A1 true WO2019050180A1 (fr) 2019-03-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2018/009257 Ceased WO2019050180A1 (fr) 2017-09-07 2018-08-13 Batterie secondaire

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KR (1) KR102425799B1 (fr)
WO (1) WO2019050180A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20240117454A (ko) * 2023-01-25 2024-08-01 주식회사 파인엠텍 이차 전지용 캡 플레이트 어셈블리 및 캡 플레이트 어셈블리의 제조 방법
EP4376207A4 (fr) * 2022-06-14 2024-12-11 Lg Energy Solution, Ltd. Batterie secondaire ayant une structure de borne améliorée

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102676180B1 (ko) 2022-04-05 2024-06-19 주식회사 엘지에너지솔루션 각형 이차전지
KR20240008184A (ko) * 2022-07-11 2024-01-18 주식회사 엘지에너지솔루션 단자 구조가 개선된 이차전지
KR20240059428A (ko) * 2022-10-27 2024-05-07 주식회사 엘지에너지솔루션 버스바를 일체로 구비하는 단자 구조체 어셈블리

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