WO2015152527A1 - Module de batterie et bloc-batterie le comportant - Google Patents

Module de batterie et bloc-batterie le comportant Download PDF

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Publication number
WO2015152527A1
WO2015152527A1 PCT/KR2015/002212 KR2015002212W WO2015152527A1 WO 2015152527 A1 WO2015152527 A1 WO 2015152527A1 KR 2015002212 W KR2015002212 W KR 2015002212W WO 2015152527 A1 WO2015152527 A1 WO 2015152527A1
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WO
WIPO (PCT)
Prior art keywords
electrode
terminal
bus bar
electrode leads
battery module
Prior art date
Application number
PCT/KR2015/002212
Other languages
English (en)
Korean (ko)
Inventor
최종운
강달모
성준엽
Original Assignee
주식회사 엘지화학
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 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to CN201580017493.2A priority Critical patent/CN106133948B/zh
Priority to EP15773941.8A priority patent/EP3109925B1/fr
Priority to PL15773941.8T priority patent/PL3109925T3/pl
Priority to US15/128,778 priority patent/US10396334B2/en
Priority claimed from KR1020150031449A external-priority patent/KR101821378B1/ko
Publication of WO2015152527A1 publication Critical patent/WO2015152527A1/fr

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    • 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
    • H01M50/20—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
    • H01M50/50—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
    • H01M50/50—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
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • 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 module, and more particularly, to a battery module including a structure in which three or more secondary cells are connected in parallel, and a technique in which a novel coupling structure of an electrode lead and a bus bar is applied.
  • водородн ⁇ е ⁇ е ⁇ ество Commercially available secondary batteries include nickel cadmium batteries, nickel hydride batteries, nickel zinc batteries, and lithium secondary batteries. Among them, lithium secondary batteries have almost no memory effect compared to nickel-based secondary batteries, and thus are free of charge and discharge. The self-discharge rate is very low and the energy density is high.
  • Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as positive electrode active materials and negative electrode active materials, respectively.
  • the lithium secondary battery includes an electrode assembly in which such a positive electrode active material and a negative electrode active material are respectively coated with a separator interposed therebetween, and a packaging material that seals the electrode assembly together with an electrolyte, that is, a case.
  • a lithium secondary battery may be classified into a can type secondary battery in which an electrode assembly is embedded in a metal can and a pouch type secondary battery in which an electrode assembly is embedded in a pouch of an aluminum laminate sheet, according to a shape of a case.
  • the battery pack of the hybrid vehicle or the electric vehicle includes a plurality of secondary batteries, and the plurality of secondary batteries are connected to each other in series and in parallel to improve capacity and output.
  • the serial connection or parallel connection between the secondary batteries may be determined in various forms according to the output, capacity, structure, etc. of the battery pack in consideration of the device to which the battery pack is applied. Accordingly, the secondary batteries are connected in various series connection and parallel connection forms to form a battery module, and the battery modules may be included in one or more battery packs. In particular, the battery module may be configured in a form in which three or more secondary cells are connected in parallel in some cases.
  • electrode leads of the same polarity need to be coupled to each other through a bus bar, and welding is performed to maintain the coupling state stably. many.
  • the laser welding method is mentioned typically.
  • the electrode leads when welding a plurality of electrode leads, for example, three or more electrode leads overlap with each other in a state where the busbars are overlapped with each other, there is a problem in that welding reliability is not properly secured. That is, as the number of electrode leads welded to the busbar increases, the electrode leads may not be properly welded to the busbar, the welding itself may not be performed, or even if the welding is performed, the weld parts may fall during subsequent manufacturing or use processes. have.
  • the battery module may be degraded or malfunction, and the separated electrode lead may cause a short circuit inside the battery module. There is a risk of fire or explosion.
  • the welding method is limited to the ultrasonic welding method, and thus there is a problem in that the degree of freedom in design and processing is greatly reduced.
  • the ultrasonic welding method has a problem that the welding strength is not large compared to the laser welding method and the cost may be increased due to the replacement of consumables such as horns and anvils.
  • a welding process may be complicated, a space occupied by the busbars in the battery module may increase, and a cost may increase.
  • the present invention has been made to solve the above problems, it is possible to use the laser welding method in a configuration in which three or more electrode leads are coupled to one bus bar, the bonding force is enhanced and the processability is improved and
  • An object of the present invention is to provide a battery pack including the same, and a vehicle to which the battery module is applied.
  • Battery module for achieving the above object, a plurality of secondary batteries having an electrode assembly, a case and an electrode lead; And a coupling part formed in a plate shape, and the electrode leads of the same polarity provided in each of three or more secondary batteries are coupled to the coupling part, and two or more electrode leads are in contact with one end of the coupling part in a state of being stacked on each other. And at least one other electrode lead in contact with the other end of the terminal busbar.
  • one electrode lead is in contact with the other end of the coupling portion of the terminal bus bar.
  • each of the electrode leads may be bent in a portion, and an end portion of the bent portion may be in contact with the terminal busbar.
  • the two or more electrode leads and the other one or more electrode leads may be bent in opposite directions to each other at both ends of the coupling portion to be in contact with the terminal busbar.
  • the at least two electrode leads and the at least one other electrode lead are bent in the vertical direction.
  • the at least two electrode leads and the at least one other electrode lead are in contact with the same surface of the coupling portion of the terminal busbar.
  • the coupling portion of the terminal busbar may be interposed between the end of the electrode lead and the case to be in contact with the electrode lead.
  • the two or more electrode leads and the coupling portion of the terminal busbar are coupled by laser welding.
  • the battery module according to the present invention further includes an inter busbar connected to electrode leads of different polarities.
  • the inter busbar may include a first coupling portion and a second coupling portion formed in a plate shape, and a connection portion connecting the first coupling portion and the second coupling portion, respectively, Three or more electrode leads of different polarities are coupled to the second coupling portion, and the first coupling portion and the second coupling portion are in contact with one end in a state in which two or more electrode leads are stacked on each other, and the other 1 More than one electrode lead is in contact with the other end.
  • terminal busbars are included.
  • the battery module according to the present invention further includes a support member for supporting the two or more terminal busbars.
  • two or more of the supporting members may be included and provided at opposite sides of the secondary battery, respectively.
  • the terminal busbar further includes a terminal portion connected to an electrode terminal of the battery module and bent in a direction perpendicular to the coupling portion.
  • the secondary battery is a pouch type secondary battery.
  • the pouch type secondary battery includes an electrode lead such that the positive electrode lead and the negative electrode lead protrude in opposite directions.
  • the battery pack according to the present invention for achieving the above object includes a battery module according to the present invention.
  • the vehicle according to the present invention for achieving the above object includes a battery module according to the present invention.
  • the welding strength of the bus bar and the electrode lead may be improved by reducing the number of electrode leads overlapping on the bus bar.
  • three or more electrode leads are coupled to one bus bar by contact, and the coupling part may be applied to the ultrasonic welding method as well as the laser welding method.
  • a battery module including a configuration in which three or more secondary cells are connected in parallel, such as a 3P (Parellel) connection configuration
  • 3P Parellel
  • the ultrasonic welding method as well as the laser welding method can be used when welding the bus bar and the electrode lead, the freedom of design and process application of the battery module can be increased.
  • the welding strength is stronger than that of ultrasonic welding method, and there is no cost of replacing consumables such as horns and anvils, and according to this aspect of the present invention, the bonding force between the electrode lead and the busbar is stably secured and manufactured. The cost can also be lowered.
  • FIG. 1 is a perspective view schematically illustrating a configuration of a battery module according to an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view of a partial configuration of FIG. 1.
  • FIG. 3 is an exploded perspective view schematically showing only a part of a configuration in which a pouch type secondary battery is stacked using a stacking frame in the configuration of FIGS. 1 and 2.
  • FIG. 4 is a top view of the configuration of FIG. 1.
  • FIG. 5 is an enlarged view of a portion A of FIG. 4.
  • FIG. 6 is an enlarged view of a portion B of FIG. 4.
  • FIG. 7 is an enlarged view of portions C1 and C2 of FIG. 4.
  • FIG. 8 is an enlarged view of a portion D of FIG. 4.
  • FIG. 1 is a combined perspective view schematically illustrating a configuration of a battery module according to an embodiment of the present invention
  • FIG. 2 is an exploded perspective view of some components of FIG. 1.
  • a battery module according to the present invention includes a plurality of secondary cells 100 and a terminal bus bar 200.
  • the secondary battery 100 includes an electrode assembly, a case 120, and an electrode lead 110.
  • An electrolyte may be accommodated in the case 120 of the secondary battery 100.
  • the electrode lead 110 may include a positive electrode lead and a negative electrode lead, and the positive electrode lead may be connected to the positive electrode plate of the electrode assembly, and the negative electrode lead may be connected to the negative electrode plate of the electrode assembly.
  • the secondary battery 100 may be a pouch type secondary battery.
  • the case 120 may be a pouch exterior material.
  • Such a pouch packaging material may be configured in a form in which a metal thin film such as aluminum is interposed between insulating layers.
  • a connection configuration of a plurality of secondary batteries 100 may be easier.
  • the battery module according to the present invention may further include a stacking frame 400 for stacking the pouch type secondary battery.
  • FIG. 3 is an exploded perspective view schematically showing only a part of a configuration in which the pouch type secondary battery 100 is stacked using the stacking frame 400 in the configuration of FIGS. 1 and 2. In the configuration of FIG. 3, only four pouch-type secondary batteries 100 and two stacking frames 400 are illustrated for convenience of description.
  • the stacking frame 400 is a component used to stack the pouch type secondary battery 100, and is configured to hold the secondary battery 100 to prevent its flow and to be stacked on each other. Assembly of the battery 100 may be guided.
  • the stacking frame 400 may be replaced with various other terms such as a cartridge, and may be configured in the form of a rectangular ring with a hollow central portion. In this case, four corners of the stacking frame 400 may be located at an outer circumferential portion of the secondary battery 100. In addition, secondary batteries 100 may be located on both sides of the stacking frame 400, respectively.
  • the battery module according to the present invention may further include a cooling fin 410.
  • the cooling fins 410 may be made of a thermally conductive material such as aluminum to allow heat exchange with the secondary battery 100.
  • the cooling fin 410 may be configured to be inserted into the center of the stacking frame 400. Therefore, when the secondary batteries 100 are stacked using the stacking frame 400, the secondary batteries 100 may be configured to have a cooling fin 410 interposed between the secondary batteries 100. Meanwhile, the cooling fins 410 may be coupled to the stacking frame 400 by insert molding.
  • the two electrode leads 110 may be provided to protrude in opposite directions to each other, as illustrated in FIGS. 1 to 3.
  • the pouch-type secondary battery 100 may be configured such that the shape viewed in the horizontal direction with respect to FIG. 3 is a quadrangular shape having approximately four sides.
  • the positive electrode lead and the negative electrode lead are located on opposite sides. It may be provided to protrude from the side.
  • at least one of the positive electrode lead and the negative electrode lead may protrude in the front direction, and the other may protrude in the rear end direction. have.
  • each electrode lead 110 can be sufficiently large.
  • the contact area between the electrode lead 110 and the terminal bus bar 200 is widened, so that the coupling process between the electrode lead 110 and the terminal bus bar 200 can be performed more easily.
  • the amount of heat generated at the contact portion between the 110 and the terminal bus bar 200 may be reduced.
  • the present invention is not necessarily limited to these embodiments, and the positive lead and the negative lead may be positioned on the same side of each other, or may be positioned on adjacent sides of each other.
  • the terminal bus bar 200 includes a coupling part 210 formed in a plate shape, and the electrode lead 110 is coupled to a flat surface of the coupling part 210.
  • the electrode lead 110 is coupled to a flat surface of the coupling part 210.
  • three or more electrode leads 110 may be coupled to the coupling portion 210 of the terminal bus bar 200.
  • a configuration in which the coupling portion 210 and the electrode lead 110 of the terminal bus bar 200 are coupled to each other will be described in detail with reference to FIGS. 4 and 5.
  • FIG. 4 is a top view of the configuration of FIG. 1, and FIG. 5 is an enlarged view of a portion A of FIG. 4.
  • FIG. 4 six stacking frames 400 are stacked in left and right directions, and two secondary batteries 100 may be accommodated in each stacking frame 400.
  • the coupling configuration of the terminal busbar 200 and the electrode lead 110 in the upper left portion is as shown in FIG. 5.
  • the terminal bus bar 200 is formed in a plate shape and includes a coupling part 210 having wide sides at both sides.
  • the wide surface of the coupling part 210 is disposed to face in the upper direction and the lower direction.
  • the electrode lead 110 provided in the secondary battery 100 is formed in a plate shape and has wide surfaces at both sides thereof, and one of the wide surfaces thereof is in contact with the wide surface of the coupling portion 210. Can be combined.
  • three electrode leads 110 may be coupled to the coupling portion 210 of one terminal bus bar 200.
  • the three electrode leads 110 may be provided in three different secondary batteries 100, respectively, and may have the same polarity.
  • all three electrode leads 110 shown in FIG. 5 connected to one terminal bus bar 200 may be positive electrode leads.
  • the three secondary batteries 100 may be connected in parallel with each other.
  • two or more electrode leads 110 of the three or more electrode leads 110 may be formed.
  • One end of the coupling part 210 may be in contact with each other in a stacked state, and the remaining one or more electrode leads 110 may be in contact with the other end of the coupling part 210.
  • the two bus bars are at least partially, in particular, the terminal bus bar 200 with the ends overlapping each other.
  • Contact the left end of the coupling portion 210 of the, and the remaining one electrode lead 110 may be configured such that at least a portion, in particular the end thereof in contact with the right end of the coupling portion 210 of the terminal busbar 200. .
  • the coupling portion of the electrode lead 110 and the terminal bus bar 200 may be fixed to each other by performing a welding process, as indicated by L in FIG. 5.
  • one or two electrode leads 110 overlap with the coupling portion 210 of one terminal bus bar 200. Therefore, laser welding may be performed to mutually fix the contact portion of the electrode lead 110 and the terminal busbar 200 as indicated by L.
  • FIG. In the case of laser welding, it is difficult to weld to the busbar in a state where three or more electrode leads 110 are overlapped, but according to the configuration of the present invention, three or more electrode leads 110 are coupled to one terminal busbar 200. However, since the maximum number of overlapping electrode leads 110, it is possible to combine the laser welding method.
  • a laser welding method may be adopted at the time of coupling between the electrode lead 110 and the terminal busbar 200.
  • the welding strength is higher than that of other welding methods, such as ultrasonic welding, so that the welding reliability can be secured, and the cost of replacing consumables such as horns and anvils used in the ultrasonic welding method can be secured. Can be reduced.
  • the laser welding method to be used together with other methods such as ultrasonic welding, the freedom of design and manufacturing process for the battery module and the battery pack can be increased due to the availability of various welding methods.
  • the electrode lead 110 may be bent to have a bent portion, and an end portion of the bent portion may contact the terminal bus bar 200.
  • each of the three electrode leads 110 is bent at a portion indicated by C, and an end portion of the bent portion is coupled to the coupling portion 210 of the terminal bus bar 200. Can be combined in contact.
  • the plurality of electrode leads 110 in contact with the coupler 210 of the terminal busbar 200 may be bent in opposite directions at both ends of the coupler 210 to be connected to the terminal busbar 200. Can be contacted.
  • the two left electrode leads 110 are bent in the right direction.
  • the right one electrode lead 110 is bent in the left direction to the right end of the coupling portion 210 of the terminal bus bar 200 Can be contacted.
  • the plurality of electrode leads 110 may be bent in a vertical direction so that the bent end may contact the coupling portion 210 of the terminal bus bar 200.
  • the left two electrode leads 110 are in the right direction 90 degrees.
  • the right one electrode lead 110 is coupled to the terminal bus bar 200 in a form bent 90 degrees in the left direction May be in contact with the unit 210.
  • the coupling portion of the terminal bus bar 200 formed in a flat plate form ( 210 can be easily coupled.
  • the terminal bus bar 200 may be contacted at any part of the left end portion or the right end portion of the coupling portion 210 of the terminal bus bar 200. It can be stably in contact with the wide surface of the flat coupling portion (210) of.
  • the bent ends of the two electrode leads 110 overlap with the left end of the coupling portion 210 of the terminal bus bar 200, and the bent end contacts the terminal bus bar 200.
  • one electrode lead 110 is bent alone at the right end of the coupling portion 210, the bent end is contacted, but the present invention is not necessarily limited to this embodiment.
  • one electrode lead 110 is bent to the left end of the coupling portion 210 of the terminal bus bar 200 and the bent end is contacted, and the coupling portion 210 of the terminal bus bar 200 is contacted.
  • the two electrode leads 110 may be bent in a state where the two electrode leads 110 overlap each other, and the bent ends may be in contact with each other.
  • three or more electrode leads 110 coupled to one terminal bus bar 200 may contact the same surface of the coupling portion 210 of the terminal bus bar 200.
  • the coupling part 210 of the terminal bus bar 200 may be formed in a plate shape and may have a wide surface at the top and the bottom thereof, respectively, the left two electrode leads 110 and the right one electrode lead 110. All may contact the outer surface of the coupling portion 210 of the terminal busbar 200 or both may contact the inner surface.
  • the outer surface means a surface opposite to the side where the case 120 of the secondary battery 100 is located among both surfaces of the coupling portion 210 of the terminal bus bar 200, and the inner surface is the secondary battery 100. The side surface of the case 120 is located.
  • both the left two electrode leads 110 and the right one electrode lead 110 are formed on the upper side surface of the coupling portion 210 of the terminal busbar 200, that is, the outer surface. Can be contacted.
  • the coupling part 210 of the terminal bus bar 200 may be interposed between the end of the electrode lead 110 and the case 120 of the secondary battery 100 to be in contact with the electrode lead 110. That is, in the configuration of FIG. 5, the coupling part 210 of the terminal bus bar 200 may be coupled to contact the inner surface of the electrode lead 110.
  • the coupling portion 210 of the terminal bus bar 200 is the electrode Without being easily separated from the lead 110, the bonding state with the electrode lead 110 may be more firmly maintained. That is, in the configuration of FIG. 5, the bent end of the electrode lead 110 is located on the upper side surface of the coupling portion 210 of the terminal busbar 200, whereby the terminal busbar 200 moves in the upper side direction. It can play a role of holding it.
  • the terminal bus bar 200 is sandwiched between the bent end of the electrode lead 110 and the main body of the secondary battery 100, and thus, the front side of the battery module is disposed on the front side of the battery module.
  • the located terminal busbar 200 may not be easily separated in the front direction.
  • the terminal bus bar 200 in the state in which the electrode lead 110 is bent in FIG. As indicated by the arrow, it may be manufactured to be slidably inserted into the space between the bent end of the electrode lead 110 and the case 120 from the upper to the lower direction.
  • the coupling portion 210 of the terminal bus bar 200 may have a protrusion having a shape protruding outwardly on the outer surface.
  • the protrusions may be interposed between the bent ends of the electrode leads 110 coupled to the outer surface of the terminal busbar 200.
  • a protrusion protruding in the front side direction may be provided on the front side surface, that is, the outer surface of the coupling portion 210 of the terminal bus bar 200.
  • one or two electrode leads 110 may be contacted in a bent form to the left and right ends of the coupling portion 210 of the terminal bus bar 200, respectively.
  • the protrusions formed on the coupling portion 210 of the terminal bus bar 200 may be located between the bent ends of the one or two electrode leads 110.
  • the protrusion of the terminal busbar 200 is bent at the left end of the terminal busbar 200 and the right side of the end of the electrode lead 110 contacted and the terminal busbar ( It may be located at the left end of the electrode lead 110 is bent and contacted at the right end of the 200.
  • the projection of the terminal bus bar 200 may serve as a guide during the insertion process of the terminal bus bar 200 and the electrode lead 110.
  • the terminal bus bar 200 may be formed.
  • the terminal bus bar 200 may be inserted while the protrusion is positioned between the bent ends of the electrode lead 110. Therefore, according to this configuration of the present invention, when the terminal bus bar 200 is inserted and moved, it may be easier to position.
  • the protrusion may serve to prevent the terminal bus bar 200 from moving in the left and right directions in a state in which the terminal bus bar 200 is coupled with the electrode lead 110. Strengthen the bonding force.
  • terminal bus bar 200 may include a terminal bus bar 200 coupled to three or more positive electrode leads and a terminal bus bar 200 coupled to three or more negative electrode leads, respectively.
  • FIG. 6 is an enlarged view of a portion B of FIG. 4.
  • three electrode leads 110 are coupled to the coupling portion 210 of the terminal bus bar 200.
  • the battery module illustrated in FIG. 4 includes a total of 12 secondary batteries 100, when the three electrode leads 110 positioned in the A portion are the anode leads, the three electrode leads 110 positioned in the B portion are provided. May be a negative electrode lead.
  • one of the three electrode leads 110 of the three electrode leads 110 included in the different secondary batteries 100 contacts the left end of the terminal bus bar 200,
  • the remaining two right electrode leads 110 may contact the right end of the coupling portion 210 of the terminal bus bar 200.
  • the left one electrode lead 110 is bent 90 degrees in the right direction, the bent end may be in contact with the left end of the coupling portion 210 of the terminal bus bar 200, the right two electrode leads 110 ) May be bent 90 degrees in a left direction so that the bent end may contact the right end of the coupling portion 210 of the terminal bus bar 200.
  • the coupling portion of the one electrode lead 110 and the terminal bus bar 200 in contact with the left end of the coupling portion 210 of the terminal bus bar 200, similarly to the configuration of FIG. 5.
  • Two electrode leads 110 in contact with the right end may be in contact with the same surface of the coupling portion 210 of the terminal bus bar 200.
  • both the left one electrode lead 110 and the right two electrode leads 110 may be in contact with the upper surface, that is, the outer surface, of the coupling portion 210 of the terminal busbar 200.
  • the coupling part 210 of the bus bar 200 may be interposed between the end of the electrode lead 110 and the case 120.
  • the terminal bus bar 200 may further include a terminal unit 220.
  • the terminal unit 220 may be referred to as a portion directly or indirectly connected to the electrode terminal of the battery module in the terminal bus bar 200.
  • the terminal 220 may be configured in the form of a plate, and may be configured to be bent in a vertical direction with the coupling portion 210 to which the electrode lead 110 is coupled.
  • the coupling part 210 of the terminal bus bar 200 is configured to be erected in the vertical direction, and the terminal part 220 is perpendicular to the coupling part 210. It may be configured to be laid down in the front-rear direction, that is, the horizontal direction.
  • the electrode terminal that is, the positive terminal or the negative terminal may be configured in the form of a bolt standing in the vertical direction, in order to facilitate the coupling with the electrode terminal of this type, in order to insert the electrode terminal on one side of the terminal portion 220
  • Concave grooves may be formed.
  • a U-shaped groove may be formed at the front end side of the terminal portion 220, and an electrode terminal may be inserted into and contact with the groove.
  • the battery module according to the present invention may further include an inter busbar 300.
  • the inter busbar 300 may be connected to electrode leads 110 having different polarities, and in particular, three or more positive electrode leads and three or more negative electrode leads may be in contact with one inter bus bar 300. have.
  • a coupling configuration of the inter busbar 300 with the electrode lead 110 will be described in more detail with reference to FIGS. 7 and 8.
  • FIG. 7 is an enlarged view of portions C1 and C2 of FIG. 4, and FIG. 8 is an enlarged view of portion D of FIG. 4.
  • the inter bus bar 300 may include a first coupling part 310, a second coupling part 320, and a connection part 330.
  • the inter bus bar 300 may be combined with six or more electrode leads 110.
  • the first coupling part 310 and the second coupling part 320 may be configured in the form of a plate having a wide surface, and three or more electrode leads 110 may be coupled to each other.
  • three electrode leads (left) are positioned on the left side of the first coupling portion 310. 110 may be coupled, and three electrode leads 110 positioned on the right may be coupled to the second coupling portion 320.
  • the electrode lead 110 coupled to the first coupling portion 310 and the electrode lead 110 coupled to the second coupling portion 320 may have different polarities.
  • the left three secondary batteries 100 are the same secondary batteries 100 as the three secondary batteries 100 shown in FIG. 5. can do. Therefore, when all three electrode leads 110 shown in FIG. 5 are positive electrode leads, three electrode leads coupled to the first coupling part 310 positioned on the left side of the inter bus bar 300 shown in FIG. All of the 110 may be negative lead. In addition, all three electrode leads 110 coupled to the second coupling part 320 positioned on the right side of the inter bus bar 300 of FIG. 7 may be positive electrode leads.
  • each of the first coupling portion 310 and the second coupling portion 320 of the inter busbar 300 are in contact with each other in a state in which two electrode leads 110 are stacked on one end, and one or the other end is in contact with each other.
  • Two electrode leads 110 may be in contact. 7 and 8, a configuration in which one electrode lead 110 is in contact with the other end of the inter bus bar 300 is illustrated.
  • the left three electrode leads 110 when the left three electrode leads 110 are coupled to the first coupling portion 310 of the inter busbar 300, two of the electrode leads 110 may be formed. Being stacked on each other and bent in the right vertical direction to contact the left end of the first coupling portion 310, the other one electrode lead 110 is bent in the left vertical direction to the right end of the first coupling portion 310 Can be contacted.
  • one of the electrode leads 110 may be right vertical. Is bent in the direction to contact the left end of the second coupling portion 320, the other two electrode leads 110 are bent in the left vertical direction in a state of being stacked with each other to contact the right end of the second coupling portion 320 Can be.
  • connection part 330 connects the first coupling part 310 and the second coupling part 320 to each other. Therefore, the electrode lead 110 coupled to the first coupling portion 310 and the electrode lead 110 coupled to the second coupling portion 320 may be electrically connected to each other. Therefore, of the six secondary batteries 100 illustrated in FIG. 7, the negative electrode leads of the left three secondary batteries 100 are coupled to the first coupling part 310, and the positive electrodes of the remaining three secondary batteries 100 are right. When the leads are coupled to the second coupling part 320, three left secondary batteries 100 and three right secondary batteries 100 are respectively connected in parallel by three, but the three secondary batteries 100 connected in parallel are connected to each other. Can be connected in series.
  • FIG. 8 when the configuration illustrated in FIG. 7 is a configuration applied to the C1 part of FIG. 4, the left three secondary batteries of the six secondary batteries 100 illustrated in FIG. 8 are illustrated in FIG. 7. It may be the same secondary battery as the right three secondary batteries. Therefore, when the right three electrode leads 110 shown in FIG. 7 are positive lead, the left three electrode leads 110 shown in FIG. 8 may be negative lead.
  • the left three electrode leads 110 may be coupled to the first coupling part 310 of the inter bus bar 300 illustrated in FIG. 8.
  • one electrode lead 110 positioned at the leftmost side of the three left electrode leads 110 may be bent in a right direction to contact the left end of the first coupling part 310, and the remaining two electrode leads ( The 110 may be bent in the left direction in an overlapping state and may contact the right end of the first coupling part 310.
  • the right three electrode leads 110 may be positive electrode leads.
  • the right three electrode leads 110 may be coupled to the second coupling part 320 of the inter bus bar 300 illustrated in FIG. 8.
  • the left two electrode leads 110 of the right three electrode leads 110 may be bent in the right direction while being stacked with each other and may be in contact with the left end of the second coupling part 320.
  • the electrode lead 110 may be bent in a left direction to contact the right end of the second coupling part 320.
  • the first coupling part 310 and the second coupling part 320 may be connected to each other by the connection part 330. Therefore, in the configuration of FIG. 8, the left three secondary batteries 100 are connected in parallel with each other, and the right three secondary batteries 100 are connected in parallel with each other, and each of the three secondary batteries 100 connected in parallel is connected in series with each other.
  • 3P-2S (3 Parallel-2 Series) connection can be configured.
  • the configuration of Figure 7 may be applied to the C2 portion of FIG.
  • the three left secondary batteries 100 of FIG. 7 may be the same as the three right secondary batteries 100 of FIG. 8. Therefore, when the right three electrode leads 110 shown in FIG. 8 are positive lead, the left three electrode leads 110 shown in FIG. 7 may be negative lead.
  • two negative electrode leads among the three left negative leads are bent in the right direction while being stacked with each other, and are in contact with the left end of the first coupling part 310, and the other one negative lead is bent in the left direction to form a first one. 1 may be in contact with the right end of the coupling portion (310).
  • the right three electrode leads 110 shown in FIG. 7 may be positive electrode leads, and one of the positive electrode leads may be bent in a right direction to contact the left end of the second coupling part 320.
  • the two anode leads may be bent in a left direction while being stacked with each other and may contact the right end of the second coupling part 320.
  • the battery module according to the present invention may further include a support member 500.
  • the support member 500 may support two or more terminal bus bars 200.
  • the support member 500 may support the inter bus bar 300.
  • at least a portion of the terminal bus bar 200 and / or the inter bus bar 300 may be fixedly coupled to the support member 500.
  • the terminal bus bar 200 or the inter bus bar 300 or the distance between each other is fixed in advance, the terminal bus bar 200 or the inter bus bar 300 is replaced with a secondary battery ( When combined with the electrode lead 110 of the 100 may be performed more smoothly.
  • any one of the terminal bus bar 200 or the inter As long as the support member 500 is moved in the direction of the arrow in accordance with the assembly position of the bus bar 300, the assembly position of the terminal bus bar 200 or the inter bus bar 300 provided in the support member 500 is changed. All can be customized.
  • the electrode leads 110 may include a positive electrode lead, a negative electrode lead, and at least two electrode leads 110
  • at least two support members 500 may be included in the battery module.
  • the two support members 500 may be provided on opposite sides of the secondary battery 100.
  • the positive lead and the negative lead of each secondary battery 100 may be provided at a front end and a rear end thereof.
  • one support member 500 may be a secondary battery 100.
  • the remaining one support member 500 may be located at a rear end of the secondary battery 100.
  • the assembling process may be facilitated, and the risk of occurrence of an internal short circuit or the like may be reduced by being electrically connected to each other.
  • the electrode leads 110 of the secondary battery 100 may be located in the same direction.
  • some terminal bus bar 200 or inter bus bar 300 is inserted from the top to the lower direction
  • the other terminal bus bar 200 or inter bus bar 300 is inserted from the bottom to the upper direction.
  • the two supporting members 500 may include secondary electrodes having the electrode leads 110. It may be located at the front end side of the battery (100).
  • one of the support members 500 moves from the upper side to the lower side so that the outer surface of the terminal bus bar 200 or the inter bus bar 300 supported thereon is in contact with the electrode lead 110.
  • One support member 500 may move from the bottom to the upper direction such that the outer surface of the terminal bus bar 200 or the inter bus bar 300 supported thereon is in contact with the electrode lead 110.
  • FIGS. 5 to 8 only the configuration in which all three electrode leads 110 are in contact with one surface of the coupling portion 210 of the bus bar is illustrated. It may be in contact with different surfaces of the coupling portion (210).
  • the left one electrode lead 110 and the right one electrode lead 110 of the three electrode leads 110 may be disposed on the outer surface of the coupling portion 210, that is, the upper side surface.
  • the center electrode lead 110 may be configured to contact the inner surface of the coupling portion 210, that is, the lower side surface.
  • the movement of the coupling portion 210 in the outward direction is limited by the one left electrode lead 110 and the right one electrode lead 110, and the one electrode lead 110 in the middle thereof is restricted.
  • the movement in the inner direction of the coupling portion 210 may be limited. Therefore, according to this configuration of the present invention, the movement in the inner and outer directions of the terminal bus bar 200 or the inter bus bar 300 can be prevented.
  • the battery module according to the present invention may include a connector 600.
  • the connector 600 may function as a terminal for connecting to a control device included in a battery pack such as a battery management system (BMS).
  • BMS battery management system
  • the connector 600 may be provided in the supporting member 500 for supporting the terminal bus bar 200 and the inter bus bar 300.
  • the battery pack according to the present invention includes one or more battery modules described above.
  • the battery pack may further include a case 120 for covering the battery module, various devices for controlling charging and discharging of the battery module, such as a BMS, a current sensor, and a fuse.
  • the battery module according to the present invention can be applied to an automobile such as an electric vehicle or a hybrid vehicle. That is, the vehicle according to the present invention may include a battery module according to the present invention.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un module de batterie et un bloc-batterie le comportant, caractérisés en ce qu'une soudure par laser peut être utilisée pour coupler au moins trois conducteurs d'électrodes à une barre omnibus, renforçant ainsi l'adhérence et améliorant la commodité d'un processus de fabrication. Le module de batterie selon la présente invention comporte: une pluralité de batteries rechargeables comprenant chacune un ensemble d'électrodes, un bac et un conducteur d'électrode; et une barre omnibus de bornes dotée d'une partie de couplage aplatie, des conducteurs d'électrodes de la même polarité incorporés à chaque batterie parmi au moins trois batteries rechargeables étant couplés à la partie de couplage, au moins deux conducteurs d'électrodes adhérant entre eux dans un empilement étant en contact avec une extrémité de la partie de couplage, et l'autre ou les autres conducteurs d'électrodes étant en contact avec l'autre extrémité de la partie de couplage.
PCT/KR2015/002212 2014-03-31 2015-03-06 Module de batterie et bloc-batterie le comportant WO2015152527A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201580017493.2A CN106133948B (zh) 2014-03-31 2015-03-06 电池模块和包括该电池模块的电池组
EP15773941.8A EP3109925B1 (fr) 2014-03-31 2015-03-06 Module de batterie et bloc-batterie le comportant
PL15773941.8T PL3109925T3 (pl) 2014-03-31 2015-03-06 Moduł akumulatorowy i zawierający go pakiet akumulatorowy
US15/128,778 US10396334B2 (en) 2014-03-31 2015-03-06 Battery module and battery pack comprising same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20140037969 2014-03-31
KR10-2014-0037969 2014-03-31
KR1020150031449A KR101821378B1 (ko) 2014-03-31 2015-03-06 전극 리드와 버스바 사이의 결합력 및 공정성이 향상된 배터리 모듈 및 이를 포함하는 배터리 팩
KR10-2015-0031449 2015-03-06

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CN108140793A (zh) * 2016-02-12 2018-06-08 株式会社Lg化学 用于冷却电池单体的汇流条和使用汇流条的电池模块
CN110168799A (zh) * 2017-06-13 2019-08-23 株式会社Lg化学 电池模块
CN110622341A (zh) * 2017-11-24 2019-12-27 株式会社Lg化学 具有增强的电连接稳定性的电池模块
CN110692149A (zh) * 2017-11-30 2020-01-14 株式会社Lg化学 具有汇流条组件的电池模块
CN110915024A (zh) * 2017-12-14 2020-03-24 株式会社Lg化学 包括汇流条组件的电池模块
CN112042004A (zh) * 2018-11-12 2020-12-04 株式会社Lg化学 包括模块壳体的电池模块
CN113711432A (zh) * 2019-06-25 2021-11-26 株式会社Lg新能源 电池模块和包括该电池模块的电池组
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CN110692149A (zh) * 2017-11-30 2020-01-14 株式会社Lg化学 具有汇流条组件的电池模块
CN110915024B (zh) * 2017-12-14 2022-06-10 株式会社Lg化学 电池模块、和包括该电池模块的电池组和车辆
CN110915024A (zh) * 2017-12-14 2020-03-24 株式会社Lg化学 包括汇流条组件的电池模块
CN112042004A (zh) * 2018-11-12 2020-12-04 株式会社Lg化学 包括模块壳体的电池模块
CN112042004B (zh) * 2018-11-12 2024-03-08 株式会社Lg新能源 包括模块壳体的电池模块
CN113711432A (zh) * 2019-06-25 2021-11-26 株式会社Lg新能源 电池模块和包括该电池模块的电池组
CN113711432B (zh) * 2019-06-25 2023-09-29 株式会社Lg新能源 电池模块和包括该电池模块的电池组
US11600842B2 (en) * 2020-03-16 2023-03-07 GM Global Technology Operations LLC Multistage plunger press systems and methods with interlocking fingers for forming battery cell tabs

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