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WO2025135508A1 - Barre omnibus et module de batterie la comprenant - Google Patents

Barre omnibus et module de batterie la comprenant Download PDF

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Publication number
WO2025135508A1
WO2025135508A1 PCT/KR2024/017780 KR2024017780W WO2025135508A1 WO 2025135508 A1 WO2025135508 A1 WO 2025135508A1 KR 2024017780 W KR2024017780 W KR 2024017780W WO 2025135508 A1 WO2025135508 A1 WO 2025135508A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductor layer
metal
bus bar
side edge
busbar
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.)
Pending
Application number
PCT/KR2024/017780
Other languages
English (en)
Korean (ko)
Inventor
한상우
전승호
신진환
윤광석
박형근
금민근
신용식
김지용
배재인
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 Energy Solution Ltd
Original Assignee
LG Energy Solution 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 KR1020240155190A external-priority patent/KR20250098910A/ko
Application filed by LG Energy Solution Ltd filed Critical LG Energy Solution Ltd
Publication of WO2025135508A1 publication Critical patent/WO2025135508A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • 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
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • 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
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • 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
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic 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 busbar and a battery module including the same, and more specifically, to a busbar formed by joining dissimilar metals and a battery module including the same.
  • the battery module means a component in which multiple battery cells are connected in series or parallel
  • the battery pack may mean a component in which multiple battery modules are connected in series or parallel to increase capacity and output, etc.
  • a battery module is composed of a number of cells electrically connected using a busbar, and the electrode leads of the battery cells are connected to the busbar.
  • the electrode lead of the battery cell when the electrode lead of the battery cell is connected to the bus bar, the electrode lead, which is made of a metal of a different material from the bus bar, is connected to the bus bar, which may increase the occurrence rate of cracks along with corrosion at the welding surface and reduce weldability.
  • a busbar comprises: a first conductor layer having a first side edge, a second side edge opposite the first side edge, and a first surface extending between the first and second side edges, the first conductor layer being made of a first metal; and a second conductor layer being made of a second metal different from the first metal and laminated and bonded to the first surface of the first conductor layer; wherein the first conductor layer has an exposed area where the first metal is exposed on the first surface of the first conductor layer to which the second conductor layer is bonded, and the second conductor layer leaves an exposed area of the first conductor layer and extends from the first side edge of the first conductor layer toward the second side edge.
  • the second conductor layer extends from the first side edge to the second side edge.
  • the exposure area of the first conductor layer extends from the second side edge toward the first side edge.
  • the first metal or the second metal includes aluminum.
  • the through hole is positioned between the exposed area and the second conductor layer.
  • the first portion of the second conductor layer is arranged parallel to the exposed area of the first conductor layer.
  • an electrode lead of the battery cell made of the first metal is bonded to the exposed area of the first conductor layer, and an electrode lead of the battery cell made of the second metal is bonded to the second conductor layer.
  • the battery module further includes a terminal bus bar made of the first metal, and an electrode lead of the battery cell made of the first metal is connected to the terminal bus bar.
  • the battery module further includes a terminal bus bar made of the second metal, and an electrode lead of the battery cell made of the second metal is connected to the terminal bus bar.
  • the battery module further includes a busbar frame arranged on one side of the battery cell stack, and the busbar is arranged in the busbar frame.
  • Figure 2 is an exploded perspective view of a battery module according to one embodiment of the present invention.
  • FIG. 4 is a perspective view of a terminal bus bar in one embodiment of the present invention.
  • FIG. 5 is a perspective view of an insulating cover and an end plate in one embodiment of the present invention.
  • FIG. 8 is a drawing showing a bus bar in one embodiment of the present invention.
  • Figure 9 is an exploded perspective view of the bus bar of Figure 8.
  • Fig. 10 is a cross-sectional view taken along line A-A in Fig. 8.
  • Fig. 11 is a rear view of the bus bar of Fig. 8,
  • FIG. 9 is an exploded perspective view of the bus bar of FIG. 8, FIG. 10 is a cross-sectional view taken along line A-A in FIG. 8, FIG. 11 is a rear view of the bus bar of FIG. 8, FIG. 12 is a drawing showing a bus bar according to another embodiment of the present invention, and FIG. 13 is a drawing showing a bus bar according to another embodiment of the present invention.
  • This is a drawing showing a busbar (terminal busbar) joint plate in one embodiment.
  • a battery module (1000) may include a battery cell stack (100) in which a plurality of battery cells (110) are stacked, a module case (200) that accommodates the battery cell stack (100), a bus bar frame (300) positioned on one side and/or the other side of the battery cell stack (100), an insulating cover (500) positioned on the outside of the bus bar frame (300), and an end plate (400) positioned on the outside of the insulating cover (500).
  • the above battery cell stack (100) may be formed by stacking a plurality of battery cells (110) along one direction, and the plurality of battery cells (110) may be electrically connected.
  • the direction in which the plurality of battery cells (110) are stacked may be the X-axis direction (or -X-axis direction) in FIG. 2.
  • the longitudinal direction of the battery cell stack (100) may be substantially the same as the longitudinal direction of the battery cell (110).
  • the electrode leads (111, 112) of the battery cell (110) may be positioned on the front and rear sides of the battery cell stack (100), and the bus bars (310, 320) of the battery module (1000) may be positioned close to the front and rear sides of the battery cell stack (100) to easily form an electrical connection with the electrode leads (111, 112).
  • the battery cell (110) may be provided as a pouch-shaped battery cell, and the number of pouch-shaped battery cells stacked per unit area may be maximized.
  • the battery cell (110) does not necessarily have to be provided as a pouch-shaped cell, and may be provided in a square shape, a cylindrical shape, or other various shapes.
  • a battery cell (110) provided in a pouch type may include an electrode assembly and a cell case (115) that accommodates the electrode assembly (see FIG. 3).
  • the upper and lower cases can both be formed of a laminate structure including an inner covering layer, a metal layer, and an outer covering layer.
  • the inner covering layer is located on the inside of the cell case (115) based on the metal layer and is in direct contact with the electrode assembly, so it must have insulation and electrolytic resistance, and in order to seal it from the outside, it is required to have sealing properties, that is, the sealing portion where the inner layers are thermally bonded must have excellent thermal bonding strength.
  • the metal layer is located between the inner covering layer and the outer covering layer and serves as a barrier layer that prevents moisture or various gases from penetrating into the battery from the outside, and a preferable material for the metal layer in contact with the inner covering layer is an aluminum (Al) thin film that is lightweight and has excellent formability.
  • a receiving groove (116) may be formed in each of the upper and lower cases, and an electrode assembly may be accommodated within the receiving groove (116) of the upper and lower cases.
  • the electrode assembly accommodated in the cell case (115) may be one from a group consisting of a jelly-roll type electrode assembly having a structure in which a separator is interposed between long sheet-shaped positive and negative electrodes and then rolled up, a stack type electrode assembly having unit cells having a structure in which rectangular positive and negative electrodes are laminated with a separator interposed between them, a stack-folding type electrode assembly in which the unit cells are rolled up by a long separator film, and a lamination-stack type electrode assembly in which the unit cells are laminated with a separator interposed between them and attached to each other.
  • the electrode assembly may include two electrode tabs and two electrode leads (111, 112) each connected to the electrode tabs by a weld.
  • a lead film (113) may be attached to each of the electrode leads (111, 112).
  • the lead film (113) attached to the electrode leads (111, 112) is positioned between the electrode leads (111, 112) and the cell case (115) to prevent a short circuit from occurring between the electrode leads (111, 112) and the cell case (115) and to improve sealing strength, thereby preventing leakage of the electrolyte, etc.
  • the structure of the module case (200) may be formed by combining an upper plate on the upper side of a U-shaped frame, which is a metal plate having a lower surface and both side surfaces combined or integrated, and each frame or plate may be manufactured by press molding.
  • the structure of the module case (200) may be provided as an L-shaped frame structure in addition to a mono-frame or a U-shaped frame, and may be provided as various structures not described in the above-described examples.
  • the structure of the module case (200) may be provided in an open form along the length direction of the battery cell stack (100).
  • the front and rear sides of the battery cell stack (100) may not be covered by the module case (200).
  • the electrode leads (111, 112) of the battery cells (110) may not be covered by the module case (200).
  • the front and rear sides of the battery cell stack (100) may be covered by a bus bar frame (300), an end plate (400), or a bus bar (310, 320) to be described later, and through this, the front and rear sides of the battery cell stack (100) may be protected from external physical impacts, etc.
  • a compression pad (150) may be positioned between one side of the inner surface of the battery cell stack (100) and the module case (200).
  • the compression pad (150) can be placed so as to face the battery cell (110) at the outermost end of the battery cell stack (100) in the X-axis direction in the drawing.
  • a thermally conductive resin may be injected between the inner surface of the battery cell stack (100) and the module case (200), and a thermally conductive resin layer (not shown) may be formed between one of the inner surfaces of the battery cell stack (100) and the module case (200) by the injected thermally conductive resin.
  • the thermally conductive resin layer may be positioned on the Z-axis of the battery cell stack (100), and the thermally conductive resin layer may be formed between the battery cell stack (100) and the bottom surface positioned on the -Z-axis of the module case (200).
  • the busbar frame (300) may be made of an electrically insulating material or may include an insulating material.
  • the busbar frame (300) may limit the busbars (310, 320) from contacting other parts of the battery cells (110) other than the parts where they are connected to the electrode leads (111, 112), and may prevent electrical short circuits from occurring.
  • the busbar frame (300) may be positioned on one side and the other side of the battery cell stack (100), respectively.
  • FIG. 6 is a drawing illustrating a busbar frame (300) according to an embodiment of the present invention.
  • a busbar (310, 320) may be mounted on one surface of the busbar frame (300), and the busbar (310, 320) may be for electrically connecting a battery cell stack (100) or battery cells (110) and an external device circuit.
  • a plurality of busbars (310, 320) may be arranged, and are positioned between the battery cell stack (100) or the busbar frame (300) and the end plate (400), so as to be protected from external impacts, etc., and to minimize deterioration of durability due to external moisture, etc.
  • the busbar (310, 320) can be electrically connected to the battery cell stack (100) through the electrode leads (111, 112) of the battery cell (110).
  • the electrode leads (111, 112) of the battery cell (110) can be bent and connected to the bus bars (310, 320) after passing through the lead slit formed in the bus bar frame (300).
  • the bus bar (310) may be for electrically connecting the battery cells, and as shown in FIGS. 6 and 7, electrode leads (111, 112) of the battery cells (110) may be connected to both sides of the bus bar (310), and the electrode lead (111) connected to one side of the bus bar (310, 320) may be a positive lead, and the electrode lead (112) connected to the other side of the bus bar (310, 320) may be a negative lead.
  • the busbar (310) may be a clad metal busbar formed by joining different types of metals.
  • the busbar (310) may be formed by joining a first conductor layer (311) and a second conductor layer (315) as illustrated in FIGS. 8 to 10, and may be formed by laminating a second conductor layer (315) on the first conductor layer (311).
  • the busbar (310) may have a through hole (312).
  • the busbar (310) may not have a through hole (312).
  • FIG. 12 is a drawing illustrating a busbar (310) without a through hole (312).
  • the first conductor layer (311) and the second conductor layer (315) may be laminated metal plates.
  • the first conductor layer (311) may have an approximately square shape.
  • the first conductor layer (311) may have a first side edge (311a) and a second side edge (311b).
  • the first side edge (311a) and the second side edge (311b) may be parallel and arranged on opposite sides.
  • the first conductor layer (311) has a first surface (311c), and a second conductor layer can be laminated on the first surface (311c).
  • the first surface (311c) can extend between the first side edge (311a) and the second side edge (311b), and can be formed as a plane.
  • the first conductor layer (311) may be made of a first metal
  • the second conductor layer (315) may be made of a second metal different from the first metal.
  • the first metal may include aluminum (Al) or may be aluminum.
  • the second metal may include copper (Cu) or may be copper.
  • the second metal may include aluminum (Al) or may be aluminum.
  • the first metal may include copper (Cu) or may be copper.
  • the first metal or the second metal may be made of an alloy in which another metal is combined with aluminum or copper.
  • the first conductive layer (311) may have a through hole (312) in the center as illustrated, and an exposed region (313) in which the first metal is exposed may be formed in a region where the second conductive layer (315) is not laminated on the first side (311c) of the first conductive layer (311).
  • the exposed region (313) may extend from the second side edge (311b) toward the first side edge (311a).
  • the exposed region (313) may not extend to the first side edge (311a).
  • the exposed region (313) may extend from the second side edge (311b) to one edge of the through hole (312).
  • An electrode lead (111) of a positive electrode made of a first metal (or aluminum) from a battery cell (110) can be joined to the exposed area (313), and the electrode lead (111) of the positive electrode can be electrically connected to the first conductor layer (311) by welding at the exposed area (313).
  • the second conductor layer (315) may be laminated on the first surface (311c) of the first conductor layer (311).
  • the second conductor layer (315) may cover the entire first surface (311c) of the first conductor layer (311), or may cover a portion of the first surface (311c) of the first conductor layer (311).
  • the portion of the first surface (311c) of the first conductor layer (311) covered by the second conductor layer (315) may be 50 to 80% of the first surface (311c).
  • the exposed area (313) of the first conductor layer (311) may be 20 to 50% of the first surface (311c).
  • a second conductor layer (315) may be laminated on an area excluding the exposed area (313) on the first surface (311c) of the first conductor layer (311), and an exposed area (316) that is exposed to the outside may be formed on the second conductor layer (315) in an area excluding the exposed area (313).
  • the second conductor layer (315) may be about 30-40% of the thickness of the first conductor layer (311), or for example, about 1/3. Accordingly, when the second metal is heavier than the first metal, for example, when the first metal includes aluminum and the second metal includes copper, the bus bar can reduce its weight while ensuring a minimum welding strength with the electrode lead.
  • the second conductor layer (315) may extend from the first side edge (311a) of the first conductor layer (311) toward the second side edge (311b) while leaving the exposed area (313) of the first conductor layer (311).
  • the second conductor layer (315) may extend from the first side edge (311a) to the second side edge (311b).
  • the second conductor layer (315) may include a first portion (317), a second portion (318), and a third portion (319), and the first portion (317), the second portion (318), and the third portion (319) may be formed integrally.
  • the first portion (317) may be arranged parallel to the exposed area (313) of the first conductor layer (311), and a through hole (312) may be arranged between the first portion (317) and the exposed area (313).
  • a negative electrode lead (112) may be joined to the first portion (317).
  • the second portion (318) may extend from one end of the first portion (317) toward the second side edge (311b).
  • the second portion (318) may extend from one end of the first portion (317) to the second side edge (311b).
  • the third portion (319) can extend from the other end of the first portion (317) toward the second side edge (311b).
  • the third portion (319) can extend from the other end of the first portion (317) to the second side edge (311b).
  • the second portion (318) and the third portion (319) can extend parallel from both ends of the first portion (317).
  • An exposed area (313) of the first conductor layer (311) can be arranged between the second portion (318) and the third portion (319).
  • the first portion (317), the second portion (318), and the third portion (319) can form an exposed area (316) in the second conductor layer (315).
  • an exposed area (313) where a first conductor layer (311) is exposed and an exposed area (316) where a second conductor layer (315) is exposed can be arranged together on one surface of a bus bar (310), and a positive electrode lead (111) can be joined to the exposed area (313), and a negative electrode lead (112) can be joined to the exposed area (316).
  • an anode electrode lead (111) made of aluminum can be joined to a first conductor layer (311) made of a first metal, aluminum, and a cathode electrode lead (112) made of copper can be joined to a second conductor layer (315) made of a second metal, copper.
  • the positive electrode lead (111) is joined to a first conductor layer (311) of the same metal material as that of the positive electrode lead, and the negative electrode lead (112) is joined to a second conductor layer (315) of the same metal material as that of the negative electrode lead, thereby forming a homogeneous joint, thereby reducing the crack occurrence rate and improving weldability.
  • a busbar weld plate (310a) can be joined to the second part (318) of the second conductor layer (315) (see FIG. 13).
  • the busbar weld plate (310a) can be connected to a connector (not shown), and the connector to which the busbar weld plate (310a) is connected can be connected to a connector (350) shown in FIG. 6.
  • the connector (350) can be connected to a sensing unit (sensing plate) (not shown) to perform functions such as voltage sensing of the battery cell (110).
  • the sensing unit is connected to the bus bar (310) through the bus bar joint plate (310a) coupled to the bus bar (310) and can sense the voltage of the battery cell (110), etc.
  • the busbar joint plate (310a) may be made of a second metal (e.g., copper). Accordingly, it may be welded to a second conductor layer (315) made of the second metal, thereby improving weldability.
  • a second metal e.g., copper
  • Battery cells (110) constituting the battery cell stack (100) can be connected in series or in parallel by bus bars (310, 320).
  • the busbars (310, 320) may include terminal busbars (320) for electrically connecting one battery module (100) to another battery module (100).
  • At least a portion of the terminal bus bar (320) may be exposed to the outside of the end plate (400) to be connected to another battery module (100), and the end plate (400) may be provided with a terminal opening (410) for this purpose.
  • the terminal bus bar (320) can have one end (second part (322)) exposed through the opening (510) of the insulating cover (500) and the terminal opening (410) of the end plate (400).
  • the terminal bus bar (320) may include a first portion (321) connected to the electrode leads (111, 112) of the battery cell (110) and a second portion (322) exposed to the outside through the terminal opening (410).
  • the terminal bus bar (320) may further include a bending portion (323) formed between the first portion (321) and the second portion (322).
  • the first part (321) can be connected to the second part (322) through the bending part (323), and one side of the first part (321) and one side of the second part (322) can be perpendicular to each other. That is, by forming a bent bending part (323) in the terminal bus bar (320), the second part (322) can protrude and be seated in the seating part (530) of the insulating cover (500), and the second part (322) can be electrically connected to the pack bus bar (not shown).
  • a joining hole (322a) is formed in the second part (322) constituting one end of the terminal bus bar (320), and the second part (322) of the terminal bus bar (320) is fixed by a fixing pin (not shown) inserted into the joining hole (322a).
  • two terminal bus bars (320) can be arranged on both sides of the bus bar frame (300).
  • one terminal bus bar (320) may be a positive (+) terminal bus bar (320), and the other may be a negative (-) terminal bus bar (320).
  • the negative electrode lead (112) of the second metal can be joined to the terminal bus bar (320) on the right side made of a second metal (e.g. copper), and weldability can be improved by forming a joint of the same metal.
  • a second metal e.g. copper
  • a terminal busbar weld plate (320b) can be joined to the terminal busbar (320) on the right.
  • the terminal busbar joint plate (320b) can be connected to a connector (not shown) like the busbar joint plate (310a), and the connector connected to the terminal busbar joint plate (320b) can be connected to the connector (350) shown in Fig. 6.
  • the connector (350) can be connected to a sensing unit (sensing plate) (not shown) to perform functions such as voltage sensing of the battery cell (110).
  • the terminal bus bar joint plate (320b) can be made of a second metal (e.g., copper). Accordingly, it can be welded to the negative terminal bus bar (320) made of the second metal, thereby improving weldability.
  • a second metal e.g., copper
  • the end plate (400) may be used to protect the battery cell stack (100) and electrical components connected thereto from external physical impact by covering the open surface of the module case (200).
  • the end plate (400) may be manufactured from a material having a predetermined strength, and for example, the end plate (400) may include a metal such as aluminum or a plastic material.
  • a terminal opening (410) may be formed in the end plate (400).
  • the terminal opening (410) may be positioned on each side of the end plate (400), and a part of the insulating cover (500) and one end (second part (322)) of the terminal bus bar (320) may be exposed through the terminal opening (410).
  • a connector opening may be located between terminal openings (410) located on both sides of the end plate (400), and a module connector may be exposed to the outside through the connector opening.
  • the end plate (400) can be combined with the module case (200) while covering the busbar frame (300) or busbar (310, 320) located on one side of the battery cell stack (100). Each corner of the end plate (400) can be combined with a corresponding corner of the module case (200) by welding, bolt fastening, hook fastening, or the like.
  • the end plates (400) can be positioned on one side and the other side of the module case (200) to cover both sides of the battery cell stack (100). In this embodiment, an example in which the end plates (400) are positioned on the front and rear sides of the module case (200) is shown.
  • the insulating cover (500) may be placed inside the end plate (400) and outside the busbar frame (300).
  • an insulating cover (500) for electrical insulation may be positioned between the end plate (400) and the busbar frame (300). That is, the busbar frame (300), the insulating cover (500), and the end plate (400) may be sequentially positioned outside the battery cell stack (100).
  • the busbar frame (300) and the insulating cover (500) may each be configured in multiples.
  • the insulating cover (500) may be made of or include an electrically insulating material and may block the busbar (310, 320) from contacting the end plate (400).
  • the insulating cover (500) may include an opening (510) and a fixing portion (530).
  • the opening (510) may be positioned on each of the upper sides of the insulating cover (500), and one end (second portion (322)) of the terminal bus bar (320) may be exposed through the opening (510).
  • a connector opening may be located between the openings (510) located on both sides of the insulating cover (500), and the module connector may be exposed to the outside through the connector opening.
  • the insulating cover (500) may be positioned on the inner surface of the end plate (400) and may be in close contact with the inner surface of the end plate (400), but this is not necessarily the case.
  • one end (the second part (322)) of the terminal bus bar (320) can be exposed through the opening (510), and the exposed one end (the second part (322)) of the terminal bus bar (320) can be mounted on the mounting portion (530). Accordingly, the mounting portion (530) can be positioned adjacent to the opening (510) and can be positioned on the upper outer surface.
  • the fixing portion (530) can have the second part (322) of the terminal bus bar (320) fixed on its upper surface, and thus the upper surface of the fixing portion (530) can form a fixing surface.
  • the fixing portion (530) can include a fixing member (531) for fixing the terminal bus bar (320).
  • the fixed member (531) can fix the second part (322) of the terminal bus bar (320) and may include a fixing hole (531a).
  • a fixing pin (not shown) can be inserted into the above fixing hole (531a).
  • a fixing pin (not shown) inserted into a joining hole (322a) formed in a second part (322) of the terminal bus bar (320) is fixed by being coupled to the fixing hole (531a), thereby allowing the second part (322) of the terminal bus bar (320) to be fixed to the insulating cover (500).
  • the second part (322) of the terminal bus bar (320) is secured to the mounting part (530) of the insulating cover (500), and the second part (322) is secured to and comes into contact with the fixing member (531) arranged in the mounting part (530).
  • a terminal cover portion (not shown) covering one end (second portion (322)) of the exposed terminal bus bar (320) can be placed on the insulating cover (500).
  • the pack bus bar is a member for connecting one battery module (1000) to another adjacent battery module (1000) or a BDU (Battery Disconnection Unit), and can be connected to an exposed end (second part (322)) of a terminal bus bar (320).
  • the pack bus bar can be connected to overlap the upper end (second part (322)) of one end (second part (322)) of the terminal bus bar (320).
  • the fixing pin is sequentially inserted into the joining hole of the pack bus bar and the joining hole (322a) of the second part (322) of the terminal bus bar (320), and then the fixing pin is fixed to the fixing groove (531a) of the fixing portion (530) so that the pack bus bar can be connected to the terminal bus bar (320).
  • the second part (322) of the terminal bus bar (320) can be fixed to the insulating cover (500) together with the pack bus bar by the fixed pin.
  • One or more battery modules (1000) according to the present invention as described above can form a battery pack.
  • the battery pack according to the present invention can accommodate at least one battery module (1000) inside a pack case and can include various control and protection systems such as a BMS (Battery Management System) and a cooling system.
  • BMS Battery Management System
  • the battery module (1000) and battery pack according to the present invention configured in this manner can be applied to various devices. Specifically, it can be applied to means of transportation such as electric bicycles, electric vehicles, and hybrid vehicles, or ESS (Energy Storage System), but is not limited thereto and can be applied to various devices that can use secondary batteries.
  • means of transportation such as electric bicycles, electric vehicles, and hybrid vehicles, or ESS (Energy Storage System), but is not limited thereto and can be applied to various devices that can use secondary batteries.
  • the present invention can provide a busbar and battery module in which the electrode lead and the busbar are welded in the same manner to improve weldability.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

Selon un mode de réalisation de la présente invention, une barre omnibus est caractérisée en ce qu'elle comprend : une première couche conductrice, en un premier métal, comportant un premier bord latéral, un second bord latéral opposé au premier et une première surface s'étendant entre les premier et second bords latéraux ; et une seconde couche conductrice, en un second métal différent du premier, stratifiée sur, et liée à, la première surface de la première couche conductrice. La première couche conductrice comporte une région exposée dans laquelle le premier métal est exposé sur la première surface de la première couche conductrice à laquelle la seconde couche conductrice est liée. La seconde couche conductrice s'étend du premier bord latéral de la première couche conductrice vers le second bord latéral en laissant telle quelle la région exposée de la première couche conductrice.
PCT/KR2024/017780 2023-12-22 2024-11-11 Barre omnibus et module de batterie la comprenant Pending WO2025135508A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2023-0190382 2023-12-22
KR20230190382 2023-12-22
KR1020240155190A KR20250098910A (ko) 2023-12-22 2024-11-05 버스바 및 이를 포함하는 배터리 모듈
KR10-2024-0155190 2024-11-05

Publications (1)

Publication Number Publication Date
WO2025135508A1 true WO2025135508A1 (fr) 2025-06-26

Family

ID=96065010

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2024/017780 Pending WO2025135508A1 (fr) 2023-12-22 2024-11-11 Barre omnibus et module de batterie la comprenant

Country Status (2)

Country Link
CN (1) CN120199983A (fr)
WO (1) WO2025135508A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180130281A (ko) * 2017-05-29 2018-12-07 주식회사 엘지화학 배터리 모듈
CN215816266U (zh) * 2021-06-09 2022-02-11 恒大新能源技术(深圳)有限公司 一种汇流排及电池模组
KR20230001269A (ko) * 2021-06-28 2023-01-04 에스케이온 주식회사 배터리 모듈
KR102526844B1 (ko) * 2022-01-18 2023-05-03 삼보모터스주식회사 버스바 프레임 및 이를 갖는 배터리 모듈
KR20230123747A (ko) * 2022-02-17 2023-08-24 주식회사 엘지에너지솔루션 전지 모듈 및 이를 포함하는 전지팩

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180130281A (ko) * 2017-05-29 2018-12-07 주식회사 엘지화학 배터리 모듈
CN215816266U (zh) * 2021-06-09 2022-02-11 恒大新能源技术(深圳)有限公司 一种汇流排及电池模组
KR20230001269A (ko) * 2021-06-28 2023-01-04 에스케이온 주식회사 배터리 모듈
KR102526844B1 (ko) * 2022-01-18 2023-05-03 삼보모터스주식회사 버스바 프레임 및 이를 갖는 배터리 모듈
KR20230123747A (ko) * 2022-02-17 2023-08-24 주식회사 엘지에너지솔루션 전지 모듈 및 이를 포함하는 전지팩

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