WO2019117436A1 - 배터리 팩 - Google Patents

배터리 팩 Download PDF

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Publication number
WO2019117436A1
WO2019117436A1 PCT/KR2018/011652 KR2018011652W WO2019117436A1 WO 2019117436 A1 WO2019117436 A1 WO 2019117436A1 KR 2018011652 W KR2018011652 W KR 2018011652W WO 2019117436 A1 WO2019117436 A1 WO 2019117436A1
Authority
WO
WIPO (PCT)
Prior art keywords
input port
adhesive
battery cell
bus bar
input
Prior art date
Application number
PCT/KR2018/011652
Other languages
English (en)
French (fr)
Korean (ko)
Inventor
윤철중
손기석
안재필
양승우
Original Assignee
삼성에스디아이 주식회사
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 삼성에스디아이 주식회사 filed Critical 삼성에스디아이 주식회사
Priority to CN201880077794.8A priority Critical patent/CN111527640B/zh
Publication of WO2019117436A1 publication Critical patent/WO2019117436A1/ko

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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • 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
    • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
    • 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
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery pack.
  • 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 as an energy source for a mobile device, an electric vehicle, a hybrid vehicle, an electric bicycle, an uninterruptible power supply, etc., and may be used in the form of a single battery cell depending on the type of an external device. Or may be used in the form of a battery pack in which a plurality of battery cells are connected to one unit.
  • a small mobile device such as a mobile phone can operate for a predetermined time with the output and capacity of a single battery.
  • the battery pack can increase the output voltage or the output current according to the number of the built-in battery cells.
  • An embodiment of the present invention includes a battery pack in which a coupling structure between an input point and a battery cell side is improved so that electrical reliability can be improved at an input point where an electrical signal relating to state information of the battery cell is input .
  • a battery cell to which a signal input unit for acquiring status information is connected;
  • a wiring board for collecting status information of the battery cell
  • An input port coupled to the signal input unit; an output port coupled to the wiring board to output status information of the battery cell; and a sensing unit including a connection unit between the input port and the output port,
  • a first adhesive portion applied on an outer surface of the welded portion
  • the present invention in a configuration for acquiring status information of a battery cell through a conductive connection with a battery cell side and controlling charging and discharging operations of the battery cell based on collected status information,
  • the conductive connection portion with the battery cell side is doubly enclosed and protected from the external harmful environment so that the electrical signal relating to the state information of the battery cell is not distorted due to the deterioration of the part or the increase of the electric resistance,
  • a battery pack capable of improving reliability can be provided.
  • FIG. 1 is an exploded perspective view of a battery pack according to an embodiment of the present invention.
  • Fig. 2 is an exploded perspective view of a part of the battery pack shown in Fig.
  • Fig. 3 is a view showing a part of the battery pack of Fig. 1 from above.
  • Fig. 4 is an exploded perspective view of a part of Fig.
  • FIG. 5 is an exploded perspective view for explaining the coupling structure of the sensing unit.
  • FIG. 6 and 7 are cross-sectional views taken along the line VI-VI of FIG. 5, wherein different cross-sectional views for illustrating the coupling structure of the sensing portion are shown.
  • Fig. 8 is an exploded perspective view of the sensing unit shown in Fig.
  • a battery cell to which a signal input unit for acquiring status information is connected;
  • a wiring board for collecting status information of the battery cell
  • An input port coupled to the signal input unit; an output port coupled to the wiring board to output status information of the battery cell; and a sensing unit including a connection unit between the input port and the output port,
  • a first adhesive portion applied on an outer surface of the welded portion
  • first and second adhesive portions may double-surround the welded portion.
  • the first bonding portion may be formed by solidification of the liquid bonding agent.
  • the second adhesive portion may be formed by a solid-state adhesive.
  • the second adhesive portion may include a double-sided tape.
  • the signal input unit and the input port may be coupled to each other via a second adhesive portion attached along the rim of the input port.
  • the second bonding portion may continuously surround the outer periphery of the welded portion between the signal input portion and the input port.
  • the first bonding portion may be filled in the filling region between the welding portion and the second bonding portion.
  • the input port may be provided with an injection hole for allowing the injection of the liquid adhesive forming the first adhesive portion.
  • the injection holes may be formed as slits formed in parallel with the opposing sides of the input ports.
  • the first bonding portion may be formed on the upper surface of the input port opposite to the welding portion.
  • first and second adhesive portions may be electrically insulative.
  • the welded portion may be an ultrasonic welded portion.
  • a push-in mark of an ultrasonic horn may be formed on the upper surface of the input port opposite to the welding portion.
  • the signal input unit may be a bus for electrically connecting neighboring battery cells
  • a voltage signal of the battery cell may be input to the input port coupled to the bus bar.
  • FIG. 1 is an exploded perspective view of a battery pack according to an embodiment of the present invention.
  • Fig. 2 is an exploded perspective view of a part of the battery pack shown in Fig.
  • Fig. 3 is a view showing a part of the battery pack of Fig. 1 from above.
  • the battery pack of the present invention includes a battery cell B and a battery cell B arranged along one direction (Z1 direction, hereinafter the same) with the battery cell B, (C) for collecting state information of the battery cell (B) from the battery cell (B), which is seated on the frame (F) do.
  • the battery cells B may be arranged along one direction (Z1 direction).
  • a plurality of frames F may be arranged along one direction (Z1 direction) so as to be coupled with the battery cell (B) through the battery cell (B).
  • the frame F is arranged along one direction (Z1 direction), and the neighboring frames F are interposed between the neighboring frames F with the battery cell B interposed therebetween. .
  • the frame F may enclose the outer periphery of the battery cell B to accommodate the battery cell B and may extend along the outer edge of the battery cell B, (FA) can be defined. More specifically, the frame F may extend along the outer edge of the battery cell B across the upper, lower, right and left sides of the battery cell B.
  • the frame F includes a counterpart of an inner area where the battery cell B is accommodated and a counterpart that forms an electrical connection with the battery cell B, for example, a bus bar 15 And a supporting portion FS of an outer region where the wiring board C is supported.
  • the support part FS may be formed on a part of the frame F extending across the upper side of the battery cell B on which the electrode 10 is formed.
  • the frame F surrounds the battery cell B on the inner side and forms a support part FS on the outer side so as to form a counterpart that forms an electrical connection with the battery cell B.
  • the support base for the bar 15 and the wiring board C can be provided.
  • the frame F is arranged along one direction (Z1 direction, hereinafter the same), and the neighboring frames F are interposed between the adjacent frames F with the battery cell B interposed therebetween. have.
  • each of the battery cells B is surrounded by a frame F arranged forward and backward in one direction (Z1 direction), and the frame F arranged forward and backward is surrounded by the battery cells B interposed therebetween
  • the outer shape of the battery cell B may be enclosed to form an outer shape covering the battery cell B, and the battery cell B may be protected as a housing.
  • the array of the frames F arranged in one direction (Z1 direction) can substantially form the appearance of the battery pack, Inside the array, the battery cell B can be enclosed by the frame F and accommodated.
  • the frame F is arranged to alternate with the battery cells B along one direction (Z1 direction, hereinafter the same), and each frame F has a different accommodating capacity for accommodating different neighboring battery cells B (FA).
  • each frame F may include different receiving portions FA for accommodating different battery cells B arranged in the forward and backward directions along one direction (Z1 direction) (FA) can be separated from each other by the partition wall (W).
  • the partition walls W of the frame F can partition different receiving portions FA between different receiving portions FA and block electrical and thermal interference to different battery cells B .
  • the battery cell B may be connected to the bus bar 15 for electrical connection with another neighboring battery cell B and may be connected to the battery cell B such as the voltage or temperature of the battery cell B,
  • the wiring board C may be connected to the battery cell B in order to obtain information and collect status information of a plurality of battery cells B.
  • the bus bar 15 and the wiring board C may correspond to a counterpart forming an electrical connection with the battery cell B, Lt; / RTI >
  • the supporting part FS of the frame F may include a bus bar supporting part FSB supporting the bus bar 15 and a substrate supporting part FSC on which the wiring board C is seated and supported.
  • the bus bar support part FSB and the substrate support part FSC may be formed at different positions of the support part FS.
  • the bus bar support part FSB may be formed at the left edge or the right edge of the frame F to correspond to the position of the electrode 10 of the battery cell B.
  • the substrate support FSC may be formed at the center of the frame F.
  • the wiring board C supported on the substrate support FSC can be disposed at a central position of the plurality of battery cells B to easily collect the state information of the battery cells B collected from a plurality of locations .
  • a sensing unit S for transmitting status information from the battery cell B side may be connected to the wiring board C.
  • the wiring board C is disposed at a central position, The distance of the sensing unit S connected to a plurality of points can be balanced substantially equally and the electrical resistance of the sensing unit S connected to a plurality of points can be balanced to prevent signal distortion.
  • the bus bar support portion FSB and the substrate support portion FSC may be formed to have different widths.
  • the bus bar support portion FSB may be formed relatively narrowly so as not to interfere with the electrical connection between the bus bar 15 and the battery cell B (more specifically, the electrode 10 of the battery cell B) have.
  • the bus bar support portion FSB can support the front and rear ends of the bus bar 15 disposed on both sides of the bent portion 15a of the bus bar 15, To provide isolation.
  • the bus bar support portion FSB supports both ends of the bus bar 15 and supports the bus bar 15 between the adjacent bus bars 15 so that both ends of the bus bar 15 do not come into contact with the ends of the adjacent other bus bars 15. [ To provide electrical isolation.
  • the bus bar support portion FSB does not need to make physical contact with both ends of the bus bar 15, as long as the bus bar support portion FSB is interposed between neighboring bus bars 15 to provide electrical insulation.
  • the bus bar support part FSB may be interposed between neighboring bus bars 15 to prevent electrical contact between neighboring bus bars 15.
  • the bus bars 15 and the electrodes of the battery cells B 10 so as not to narrowly limit the energizing area between them.
  • the bus bar support portion FSB is formed to have a wide width like the substrate support portion FSC, the bus bar support portion FSB is provided between the bus bar 15 and the battery cell B (more specifically, the electrode 10 of the battery cell B) Electrical contact is obstructed and the energizing area between the bus bar 15 and the battery cell B is limited so that the electrical resistance of the entire charge and discharge path is increased and the electrical output may be lowered.
  • the bus bar support part FSB may be formed along the left and right edge positions of the support part FS corresponding to the different electrodes 10 formed on the right and left sides along the width direction of the battery cell B.
  • the frame F may be arranged in a pattern that is laterally reversed along one direction (Z1 direction), so that the bus bar support part FSB along the one direction (Z1 direction) They may be arranged in alternating patterns and arranged along the left and right edges.
  • the bus bar support part FSB may be formed at a left or right side of a substrate supporting part FSC formed at a central position of the frame F, and a plurality of frames F may extend in one direction (Z1 direction)
  • the bus bar supporting part FSB can be arranged on both sides of the substrate supporting part FSC along one direction (Z1 direction).
  • the substrate support FSC may be formed to have a relatively wide width so that the wiring board C can be stably mounted and supported.
  • the wiring board C may be disposed on the substrate supporting portions FSC of the respective frames F and the substrate supporting portions FSC of the respective frames F may be connected to each other along one direction (Z1 direction), and it is possible to provide a support base for supporting the entire wiring board (C). That is, the substrate supporting portions FSC of each frame F support the wiring substrate C, and the substrate supporting portions FSC of the respective frames F are connected to each other along one direction (Z1 direction)
  • a supporting surface extending in a long direction along the longitudinal direction of the wiring substrate C may be formed to provide a stable supporting base of the entire wiring board C.
  • the bus bar 15 is for connecting the neighboring battery cells B to each other.
  • the bus bars 15 connect the adjacent battery cells B in series or in parallel, or may be connected in a serial / parallel combination manner .
  • the bus bar 15 electrically connects the electrodes 10 of the neighboring battery cells B to electrically connect neighboring battery cells B to each other. More specifically, the bus bar 15 can form a parallel connection by connecting the same polarities of neighboring battery cells B, and by connecting the opposite polarities of neighboring battery cells B to each other, Can be formed.
  • the bus bar 15 is disposed to face the electrode 10 formed on the upper surface of the battery cell B and can connect the electrodes 10 of the battery cell B disposed adjacent to each other. More specifically, the bus bar 15 is electrically connected to the electrode 10 of the battery cell B adjacent to both sides of the bus bar 15, around the bent portion 15a formed at the central position of the bus bar 15 ). ≪ / RTI > The bus bar 15 may be formed to connect the electrodes 10 of a pair of adjacent battery cells B to each other.
  • the substrate support FSC may be formed at a central position between the bus bar supports FSB formed on the left and right edges.
  • the wiring board C may be seated on the substrate support FSC.
  • the wiring board C may include a plurality of conductive patterns (not shown) for collecting state information of the battery cell B and transferring the collected state information to a battery management unit (not shown).
  • the wiring board C is connected to a bus bar 15 for electrically coupling neighboring battery cells B to obtain voltage information of the battery cells B.
  • the wiring board C may be connected to a thermistor (not shown) disposed on the upper surface of the battery cell B to obtain temperature information of the battery cell B.
  • the wiring board C collects status information about the status information, for example, voltage and temperature, obtained from the plurality of battery cells B and transfers the collected status information to a separate battery management unit (not shown) Discharge operation of the battery cell B based on the state information obtained through the battery management unit provided with the wiring board C or to control the charge and discharge operations of the battery cell B Can be controlled.
  • a separate battery management unit not shown
  • a flexible sensing unit S may be connected to the wiring board C for mediating signal transmission related to the state information of the battery cell B.
  • FIG. The sensing unit S may be provided in a film form so as to be flexibly deformable.
  • the sensing unit S includes an input port SI connected to the battery cell B side (for example, a bus bar 15 electrically connected to the battery cell B) and an output port SI connected to the wiring board C side. (SO), and may include a connection part (SC) connecting the input port (SI) and the output port (SO).
  • SC connection part
  • the input port SI may correspond to a position where state information of the battery cell B is input from the battery cell B side (for example, the bus bar 15 electrically connected to the battery cell B)
  • the output port SO may correspond to a position where the state information of the battery cell B is output toward the wiring board C.
  • the connecting portion SC connects the input port SI and the output port SO and may be formed in a curved shape including a curved portion and disposed to overlap with each other.
  • the input port SI of the sensing unit S may be connected to the battery cell B side. More specifically, the input port SI of the sensing unit S may be connected to a bus bar 15 that electrically connects neighboring battery cells B, The voltage signal of the battery cell B from the bus bar 15 can be input. Although not shown in the drawings, in another embodiment of the present invention, the input port SI may be connected on a thermistor (not shown) disposed on the upper surface of the battery cell B, The temperature signal of the battery cell B can be input from the thermistor (not shown). In this sense, the input port SI of the sensing unit S may be connected to a signal input unit for acquiring status information of the battery cell B.
  • the signal input unit is connected to the battery cell B in order to acquire status information such as the voltage and the temperature of the battery cell B.
  • the signal input unit may include a bus bar electrically connected to the battery cell B, (Not shown) thermally connected to the battery cell 15 or the battery cell B.
  • the connection portion SC of the sensing portion S connects the input port SI and the output port SO and may be formed in a curved shape including a curved portion and disposed to overlap with each other.
  • the battery pack may include a frame F which is coupled to the battery cell B in the one direction (Z1 direction) in which the battery cells B are arranged to face each other via the battery cells B.
  • the battery cell B can experience swelling that swells along one direction (Z1 direction) in accordance with charging and discharging operations and can be swung along the Z1 direction in one direction (Z1 direction) via the battery cell (B)
  • the frame F is slid in one direction (Z1 direction) to accommodate deformation due to swelling of the battery cell B.
  • connection portions SC are formed in a curved shape that includes the curved portions and are disposed so as to overlap with each other, so that the connection portions SC follow the relative position extension between the input port SI and the output port SO according to the swelling, And the concentration of stress accumulated in the connection portion SC can be reduced.
  • the output port SO of the sensing unit S may be connected to a pad (not shown) of the wiring board C.
  • An electrical signal transmitted through the output port SO of the sensing unit S may be, (Not shown) on the wiring board C through a pad (not shown) of the wiring board C.
  • the output port SO of the sensing unit S may be welded or soldered on a pad (not shown) of the wiring board C or may be coupled using a conductive adhesive or the like.
  • FIG. 1 and 2 denote an end block E and an end plate 210.
  • the end block E and the end plate 210 are connected to a battery cell B to provide a fastening force for physically restricting the plurality of battery cells B constituting the battery pack.
  • Fig. 4 is an exploded perspective view of a part of Fig. 5 is an exploded perspective view for explaining the coupling structure of the sensing unit.
  • 6 and 7 are cross-sectional views taken along the line VI-VI of FIG. 5, wherein different cross-sectional views for illustrating the coupling structure of the sensing portion are shown.
  • the input port SI of the sensing unit S and the signal input unit are connected to each other by a coupling unit CP coupled to each other, Can be formed.
  • the coupling portion CP between the input port SI and the bus bar 15 includes the welded portion WD corresponding to the conductive coupling so that the voltage signal of the bus bar 15 passes through the input port SI, (S).
  • the first and second adhesive portions A1 and A2 may be formed around the welded portion WD of the input port SI.
  • the ultrasonic horn UH having a plurality of protruding tips formed thereon is pressed onto the input port SI,
  • the ultrasonic welding can be performed in such a manner that the input port SI and the bus bar 15 are fusion-bonded to each other by applying ultrasonic vibration to the SI.
  • the first and second adhesive portions A1 and A2 may be sequentially formed around the welded portion WD.
  • the first adhesive portion A1 may be formed of a liquid adhesive
  • the second adhesive portion A2 may be formed of a solid adhesive.
  • the first and second bonding portions A1 and A2 can function to protect the welded portion WD by enclosing the periphery of the welding portion WD in a double manner.
  • the first and second adhesive portions A1 and A2 may surround the welded portion WD in a double manner to insulate the welded portion WD from an external harmful environment such as moisture or oxygen, It is possible to prevent the deterioration of the welded portion WD such as oxidation of the welded portion WD and to prevent the increase in the electrical resistance of the welded portion WD.
  • the coupling part CP between the input port SI and the bus bar 15 includes a welding part WD, a first bonding part A1 applied on the outer surface of the welding part WD, And a second bonding portion A2 surrounding the outer periphery of the first bonding portion A1.
  • the welding portion WD corresponds to a conductive coupling capable of mediating an electrical connection between the input port SI and the bus bar 15.
  • the first and second bonding portions A1 and A2 are welded WD) to protect the welded portion WD, and may correspond to an insulating coupling that does not form a conductive bond.
  • the first bonding portion A1 is formed in a liquid phase and can be injected onto the welded portion WD so as to be applied to the outer surface of the welded portion WD. More specifically, in the input port SI, an injection hole IH for allowing the injection of the liquid adhesive can be formed for forming the first adhesive portion A1.
  • the injection hole IH may be formed at a plurality of positions of the input port SI so that the liquid adhesive injected through the injection hole IH can be uniformly applied along the outer surface of the welded portion WD. And may be formed symmetrically with respect to each other so that the first bonding portion A1 is applied at a uniform position along the outer surface of the welded portion WD. More specifically, the injection holes IH may be formed in the form of slits along the edge of the input port SI and may extend in parallel along a pair of opposing sides of the input port SI.
  • the liquid adhesive is injected through the injection hole IH of the input port SI in the formation of the first adhesive portion A1
  • a liquid adhesive can be applied on the outer surface of the weld WD formed between the input port SI and the bus bar 15 and the solid adhesive A1 is formed as the liquid adhesive coagulates .
  • the first adhesive portion A1 is formed by injecting a liquid adhesive so that it can be uniformly applied on the outer surface of the weld portion WD and can be uniformly applied to the inside of the filling region FF defined by the second adhesive portion A2, So as to cover the welded portion WD.
  • the first bonding portion A1 is formed on the outer surface of the welding portion WD to protect the welding portion WD and may be formed of an insulating adhesive having no conductivity.
  • a conductive adhesive other than an insulating adhesive may be used.
  • more stringent process control is required in the step of injecting the adhesive in order to avoid an electrical short circuit with other surrounding structures .
  • the second adhering portion A2 can form an adhered state between the input port SI and the bus bar 15 even before welding and is particularly formed in a solid state so as to maintain the shape even during welding such as ultrasonic welding,
  • the connection state between the port SI and the bus bar 15 can be maintained.
  • the input port SI may be disposed on the bus bar 15 such that the input port SI is connected to the bus bar 15 via the second bonding portion A2, And the input port SI and the bus bar 15 can be joined to each other via the second adhesive portion A2.
  • the second bonding portion A2 is formed in a solid state, the shape of the second bonding portion A2 can be maintained in spite of repetitive external forces such as ultrasonic vibration, and the bonding state between the input port SI and the bus bar 15 is firmly maintained .
  • the second adhesive portion A2 may be made of a solid adhesive so as to maintain its shape even by ultrasonic vibration, and may be provided as a double-sided tape, for example.
  • the second adhesive portion A2 may be attached along the rim between the input port SI and the bus bar 15. [ More specifically, the second adhesive portion A2 may be attached along the rim of the input port SI so as to surround the periphery of the welded portion WD to be formed between the input port SI and the bus bar 15. [ That is, the second bonding portion A2 and the welding portion WD can be spaced apart from each other via the filling region FF and the filling region FF between the second bonding portion A2 and the welding portion WD, The first bonding portion A1 may be formed.
  • the second adhering portion A2 along the rim of the input port SI, it is possible to form the filling region between the welding portion WD formed around the center position of the input port SI and the second adhering portion A2, (FF) is defined, and a liquid adhesive is injected into the filling region FF defined as described above to form the first bonding portion A1.
  • the second adhesive portion A2 defines a filling region FF filled with a first adhesive portion A1 formed of a liquid adhesive and the liquid adhesive uses a second adhesive portion A2 as a stopper, It may not leak to a position outside the port SI.
  • the first bonding portion A1 may be formed in the filling region between the second bonding portion A2 and the weld portion WD in accordance with the guidance of the second bonding portion A2 surrounding the outer periphery of the first bonding portion A1.
  • a sufficient height can be formed in the filling region FF by limiting the flow so that the second bonding portion A2 does not flow out of the filling region FF and the welding portion WD Can be sufficiently covered.
  • the second adhering portion A2 may be continuously formed along the periphery between the input port SI and the bus bar 15. [ That is, the second adhering portion A2 continuously surrounds the outer edge of the welded portion WD formed between the input port SI and the bus bar 15, thereby forming a gap between the welded portion WD and the second adhering portion A2 A solid filled region FF may be formed and the liquid adhesive of the first adhesive portion A1 filled in the filling region FF may be trapped by the second adhesive portion A2 and may not leak to the outside.
  • the second adhesive portion A2 can be continuously formed along the rim of the input port SI, and the second adhesive portion A2 is continuously formed along the outer edge of the first adhesive portion A1 ,
  • the liquid adhesive of the first bonding portion A1 can be prevented from flowing out, and the formation range of the first bonding portion A1 can be clearly restricted.
  • the second adhesive portion A2 is sandwiched between the input port SI and the bus bar 15 and is connected to the input port SI and the bus bar 15 in spite of the vibration of the ultrasonic horn UH, It is preferable that the adhesive agent has a cushioning property while being a solid adhesive so as to maintain the bonding state between the bars 15.
  • the second adhesive portion A2 may be provided as a double-sided tape. Since the input port SI and the bus bar 15 form a conductive connection through the welded portion WD, the second bonded portion A2 surrounding and protecting the welded portion WD is connected to the input port SI It is possible to form an insulating bond between the bus bars 15. If the second bonding portion A2 to which ultrasonic vibration is applied is formed of a conductive bond, more stringent process control may be required to prevent electrical short-circuiting with other peripheral structures.
  • the coupling between the input port SI and the bus bar 15 may be performed in the following order.
  • the input port SI is arranged on the bus bar 15 in such a manner that the input port SI is overlapped with the input port SI via the second bonding portion A2 between the input port SI and the bus bar 15.
  • the bus bar 15 are connected to each other.
  • Ultrasonic vibration is applied to the bus bar 15 and the input port SI to perform ultrasonic welding.
  • an ultrasonic welding portion WD can be formed between the input port SI and the bus bar 15 by providing the ultrasonic vibration by pressing the ultrasonic horn UH against the upper surface of the input port SI , And an imprinting station of the ultrasonic horn UH may be formed on the upper surface of the input port SI.
  • the upper surface of the input port SI may be a surface opposite to the welded portion WD of the input port SI, and an indentation mark by ultrasonic welding may be formed on the upper surface of the input port SI. have. Thereafter, the liquid adhesive is injected through the injection hole IH of the input port SI to form the first adhesive portion A1 coated on the outer surface of the welded portion WD.
  • the liquid adhesive When the liquid adhesive is injected for forming the first adhesive portion A1, the liquid adhesive can be applied on the upper surface of the input port SI, and the liquid adhesive applied on the input port SI Permeates between the input port SI and the bus bar 15 through the injection hole IH of the input port SI and penetrates into the filling region FF between the second adhering portion A2 and the welded portion WD It is possible to cover the welded portion WD.
  • the liquid adhesive (first adhesive portion A1) is filled in the filling port (SI) in such a manner that the liquid adhesive (first adhesive portion A1) is simply applied to the upper surface of the input port SI through the injection hole IH formed in the input port SI
  • the adhesive agent (first adhesive portion A1) in the liquid state can be adhered to the input port (SI) by the second adhesive portion A2 attached along the rim of the input port SI, SI to a height sufficient to cover the weld WD without flowing out to an external position outside the welded portion WD.
  • the second adhesive portion A2 defines the position where the first adhesive portion A1 is formed, and prevents the liquid adhesive forming the first adhesive portion A1 from flowing out to an external position out of the input port SI It can serve as a dam that is confined inside the filling area (FF).
  • the first bonding portion A1 includes not only the filling region FF between the input port SI and the signal input portion (for example, the bus bar 15 electrically connected to the battery cell B) And may also be formed on the upper surface of the input port SI.
  • the upper surface of the input port SI may be a surface opposite to the welded portion WD of the input port SI and the first adhesive portion A1 may be formed on the upper surface of the input port SI. have.
  • the input port SI of the sensing unit S may be coupled to a portion of the bus bar 15 disposed on the coupling support CB and may be relatively fixed by the coupling support CB And may be coupled to a portion of the bus bar 15 held at a high level.
  • the coupling between the input port SI and the bus bar 15 can be physically supported by the coupling support CB and the portion of the bus bar 15 associated with the input port SI can be supported by a relatively high It is possible to reduce the interference with other components in the formation of the first and second adhesive portions A1 and A2 including the ultrasonic welding between the input port SI and the bus bar 15, The ease of the process can be improved.
  • the coupling support CB may be formed on the bus bar support part FSB and integrally formed with the bus bar support part FSB.
  • Fig. 8 is an exploded perspective view of the sensing unit shown in Fig.
  • the sensing unit S includes a conductive line S10 for mediating signal transmission relating to state information of the battery cell B, a conductive line S10 for insulation of the conductive line S10, (Not shown).
  • the conductive line S10 may be formed in a copper foil pattern, and an insulating film S20 may be disposed to embed the conductive line S10 so that an electric signal transmitted through the conductive line S10 is supplied from the outside It can be insulated.
  • the input port SI of the sensing unit S is formed with an injection hole IH for allowing injection of the liquid adhesive corresponding to the first adhesive portion A1.
  • the injection hole IH may be formed in the conductive line S10 and the insulating film S20 may be formed to cover the conductive line S10 formed with the injection hole IH, An input port SI may be provided.
  • the periphery of the injection hole IH can be surrounded by the insulating film S20, and the remaining liquid adhesive (corresponding to the first adhesion portion A1) flows around the injection hole IH to other peripheral structures It is possible to block the flow of the liquid adhesive (corresponding to the first bonding portion A1).
  • the present invention can be applied to various devices using a battery pack as an energy source capable of charging and discharging and a battery pack as a driving power source.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)
PCT/KR2018/011652 2017-12-11 2018-10-01 배터리 팩 WO2019117436A1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880077794.8A CN111527640B (zh) 2017-12-11 2018-10-01 电池组

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KR1020170169533A KR102152885B1 (ko) 2017-12-11 2017-12-11 배터리 팩
KR10-2017-0169533 2017-12-11

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KR102152885B1 (ko) 2020-09-07
CN111527640A (zh) 2020-08-11
KR20190069128A (ko) 2019-06-19

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