WO2020101073A1 - Battery module - Google Patents

Battery module Download PDF

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Publication number
WO2020101073A1
WO2020101073A1 PCT/KR2018/014028 KR2018014028W WO2020101073A1 WO 2020101073 A1 WO2020101073 A1 WO 2020101073A1 KR 2018014028 W KR2018014028 W KR 2018014028W WO 2020101073 A1 WO2020101073 A1 WO 2020101073A1
Authority
WO
WIPO (PCT)
Prior art keywords
cartridge
icb
battery module
bus bar
snap
Prior art date
Application number
PCT/KR2018/014028
Other languages
French (fr)
Korean (ko)
Inventor
방석준
Original Assignee
엘지전자 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 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to PCT/KR2018/014028 priority Critical patent/WO2020101073A1/en
Publication of WO2020101073A1 publication Critical patent/WO2020101073A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • 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
    • 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
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • 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
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/193—Means for increasing contact pressure at the end of engagement of coupling part, e.g. zero insertion force or no friction
    • 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 capable of connecting the power of the battery cells in a non-welding manner without deformation of the cell leads.
  • a secondary battery As a power source for a vehicle, a high-output large-capacity is required, so it is necessary to develop a medium-to-large battery module having a structure in which a plurality of small secondary batteries (unit cells) are connected in series and / or in parallel.
  • the battery module according to the prior art uses techniques such as laser welding and ultrasonic welding as a method of connecting small secondary batteries in series and / or in parallel, but the welding and electrode terminal bonding method is complicated in manufacturing and assembly processes, There was a problem that the process cost is increased and maintenance is difficult.
  • the first problem to be solved by the present invention is to provide a battery module that can connect the power of the battery cells in a weldingless manner.
  • the second problem to be solved by the present invention is to provide a battery module capable of minimizing damage to a cell lead between assembly and removal of the battery module.
  • the third problem to be solved by the present invention is to provide a battery module that is easy to assemble and remove and replaces damaged battery cells.
  • a fourth problem to be solved by the present invention is to provide a battery module with improved electrical connection of battery cells.
  • the battery module according to the present invention each comprising a cell body, a cell lead protruding from the cell body, a plurality of battery cells stacked on each other; A plurality of cartridges, each of which includes a cartridge body in which the cell body is disposed, and a cartridge bus bar protruding from the cartridge body and contacting the cell lead; And an ICB (Interconnect Circuit Board) including a plurality of ICB busbars that pressurize the cartridge busbar so that the cell leads and cartridge busbars are in close contact, and a circuit board electrically connected to the ICB busbars. On the side and the other side opposite to the one side, the cartridge busbars are respectively contacted to form a cell lead-busbar contact.
  • ICB Interconnect Circuit Board
  • the ICB bus bar includes a fixing part fixed to the ICB; And an insertion portion protruding from the fixing portion and into which the cell lead-bus bar contact portion is inserted.
  • the ICB includes a snap protrusion at an upper end and a lower end, and the cartridge may include a snap hole engaged with the snap protrusion and snap-fitted.
  • the cartridge body may include at least one of a snap protrusion and a snap groove, and the plurality of cartridges may be mutually coupled by snap-fit engagement by the snap protrusion and the snap groove.
  • the cell lead-busbar contacts are in close contact to connect the power of the battery cells in a weldingless manner.
  • the cell lead is in close contact with the cartridge bus bar without bending deformation, so that damage to the cell lead between assembly and removal of the battery module can be minimized.
  • each of the plurality of cell lead-bus bar contacts may be inserted into the plurality of ICB bus bars to facilitate assembly and removal of the battery module.
  • the electrical connection of the battery cells can be improved by the ICB busbar pressing the cell lead-busbar contacts.
  • FIG. 1 is a conceptual diagram of a vehicle including a battery pack according to the present invention.
  • FIG. 2 is an exploded perspective view of a battery pack including a battery module according to the present invention.
  • FIG 3 is a perspective view of a battery module according to the present invention.
  • FIG. 4 is an exploded perspective view of a battery module according to the present invention.
  • FIG. 5 is a diagram briefly showing the configuration of a battery module according to the present invention.
  • FIG. 6 is a perspective view of a first cartridge according to the present invention.
  • FIG. 7 is a perspective view of a second cartridge according to the present invention.
  • FIG. 8 is a perspective view of a cartridge bus bar according to the present invention.
  • FIG. 9 is a view showing a contact state between the cell lead and the cartridge bus bar according to the present invention.
  • FIG. 10 is a view showing a state in which the ICB is assembled to the cell lead-bus bar contact according to the present invention.
  • FIG. 11 is a cross-sectional view of the ICB bus bar according to the present invention.
  • FIG. 12 is a perspective view of an ICB according to the present invention.
  • FIG. 13 is a perspective view of first and second ICB busbars according to the present invention.
  • FIG. 14 is a cross-sectional view showing a state in which the boss portion is coupled to the fixing portion according to the present invention.
  • 15 is a side view showing a state in which the ICB according to the present invention is coupled to the cartridge.
  • FIG. 16 is a perspective view of an ICB according to another embodiment of the present invention.
  • 17 is a view showing one surface of a pressing body according to another embodiment of the present invention.
  • the present invention is described in the three-dimensional coordinate system, respectively, shown in Figures 1 and 2, named as front, rear, upper, lower, left and right. Can be.
  • the present invention may be described based on a spatial Cartesian coordinate system by x-axis, y-axis, and z-axis orthogonal to each other shown in FIG. 3 and the like.
  • the x-axis, y-axis, and z-axis are defined with the vertical direction as the Z-axis direction and the longitudinal direction of the battery cell as the x-axis direction.
  • Each axial direction (x-axis direction, y-axis direction, z-axis direction) means both directions in which each axis extends.
  • each axis direction (+ x-axis direction, + y-axis direction, + z-axis direction) means a positive direction which is one of both directions in which each axis extends.
  • the '-' sign in front of each axial direction (-x-axis direction, -y-axis direction, -z-axis direction) means a negative direction, which is the other of the two directions in which each axis extends.
  • FIGS. 1 and 2 a battery pack including a battery module according to the present invention will be described with reference to FIGS. 1 and 2.
  • FIG. 1 is a conceptual diagram of a vehicle including a battery pack according to the present invention.
  • 2 is an exploded perspective view of a battery pack including a battery module according to the present invention.
  • the vehicle 1 may include a motor 5 that generates power to drive the vehicle 1.
  • the vehicle 1 may include a battery pack 10 that generates electrical energy.
  • the motor 5 is operated by receiving electric energy from the battery pack 10 and can convert electric energy into kinetic energy.
  • the battery pack 10 may be located at the center of the bottom of the vehicle body.
  • the battery pack 10 may be disposed between the front rotation axis and the rear rotation axis of the vehicle 1.
  • the battery pack 10 may repeat charging to increase the battery capacity and discharging to decrease the battery capacity. When charging and discharging the battery pack 10, heat may be generated.
  • the battery pack 10 may include a casing 20 forming an outer shape.
  • the casing 20 may include a tray 22 that supports the load of the battery module 100.
  • the casing 20 may include a cover 21 coupled to the tray 22 to cover the battery module 100.
  • the casing 20 may include a support panel 25 that reinforces the rigidity of the tray 22 and distributes the load of the heat sink 40 evenly on the tray 22.
  • the battery pack 10 may include a heat sink 40 through which cooling water absorbing thermal energy generated in the battery module 100 flows.
  • the heat sink 40 is formed of a material having a high heat transfer coefficient, and cooling water may flow therein.
  • the battery pack 10 may include a thermal pad 60 that transfers heat energy of the battery module 100 to the heat sink 40.
  • the thermal pad 60 may be a thermal conductive pad.
  • the thermal pad 60 may be formed of a material having high thermal conductivity.
  • the battery pack 10 may include a bracket 80 disposed on an upper side of the battery module 100 to support the cover 21.
  • the battery pack 10 may include a battery module 100 including cells generating electric energy.
  • a plurality of battery modules 100 may be provided in the battery pack 10.
  • the plurality of battery modules 100 may be electrically connected.
  • the plurality of battery modules 100 in the battery pack 10 may be disposed on the same plane.
  • a plurality of battery modules 100 may be arranged up and down.
  • FIG. 3 is a perspective view of a battery module according to the present invention.
  • 4 is an exploded perspective view of a battery module according to the present invention.
  • 5 is a diagram briefly showing the configuration of a battery module according to the present invention.
  • 6 is a perspective view of a first cartridge according to the present invention.
  • 7 is a perspective view of a second cartridge according to the present invention.
  • 8 is a perspective view of a cartridge bus bar according to the present invention.
  • 9 is a view showing a contact state between the cell lead and the cartridge bus bar according to the present invention.
  • 10 is a view showing a state in which the ICB is assembled to the cell lead-bus bar contact according to the present invention.
  • 11 is a cross-sectional view of the ICB bus bar according to the present invention.
  • 12 is a perspective view of an ICB according to the present invention.
  • 13 is a perspective view of first and second ICB busbars according to the present invention.
  • 14 is a cross-sectional view showing a state in which the boss portion is coupled to the fixing portion according to the present invention.
  • 15 is a side view showing a state in which the ICB according to the present invention is coupled to the cartridge.
  • the battery module 100 includes a battery cell 130, cartridges 110 and 120, and an ICB (Interconnect Circuit Board) 160.
  • ICB Interconnect Circuit Board
  • the battery cell 130 may generate electrical energy.
  • the structure and method of generating the electric energy by the battery cell 130 is not different from that of the well-known secondary battery, so a detailed description thereof will be omitted.
  • a plurality of battery cells 130 may be stacked with each other.
  • the battery cells 130 may be stacked with each other in the y-axis direction.
  • Each of the plurality of battery cells 130 may include a cell body 131 and a cell lead 133 protruding from the cell body 131.
  • the cell lead 133 may protrude from the cell body 131 in the x-axis direction.
  • the cell lead 133 may be understood as an electrode terminal in a secondary battery.
  • the cell lead 133 may protrude from at least one side of the cell body 131. As an example, as shown in FIG. 4, the cell leads 133 may protrude from each side of the cell body 131. In this case, the cartridge bus bars 111 and 121, which will be described later, may also protrude from both sides of the cartridge bodies 119 and 129 corresponding to the cell leads 133.
  • the cell lead 133 according to the present invention is not bent or deformed for contact with a bus bar described later. Accordingly, damage to the cell lead 133 can be prevented, and will be described later in more detail.
  • the battery cells 130 may be disposed inside the cartridges 110 and 120.
  • a plurality of cartridges 110 and 120 may be stacked with each other.
  • the cartridges 110 and 120 may be stacked mutually in the y-axis direction.
  • Each of the plurality of cartridges 110 and 120 includes cartridge bodies 119 and 129 in which the cell body 131 is disposed, and cartridge bus bars 111 and 121 protruding from the cartridge bodies 119 and 129. can do.
  • the cartridge bus bars 111 and 121 may protrude from the cartridge bodies 119 and 129 in the x-axis direction.
  • the cartridge bus bars 111 and 121 may be electrically connected by contacting the cell lead 133 which is an electrode terminal. That is, the electrical energy generated by the battery cell 130 may be transmitted to the outside through the electrical connection between the cell lead 133 and the cartridge busbars 111 and 121.
  • the cartridge busbars 111 and 121 are respectively contacted to form the cell lead-busbar contact portion A. have.
  • the one side of the cell lead 133 is in contact with the cartridge bus bar 121 in the -y axis direction, the cell lead 133 The other side may contact the cartridge busbar 111 in the + y-axis direction to form a cell lead-busbar contact portion A.
  • the gap between the cartridge busbars 111 and 121 contacting both sides of the cell lead 133 may be made smaller than the thickness of the cell lead 133 before the cartridge busbar 121 contacts. Thereby, the electrical connection of the cell lead-busbar contact portion A can be improved.
  • a plurality of cell lead-bus bar contacts A may also be formed as shown in FIG. 3 and the like. have.
  • a plurality of ICB bus bars 170 and 180 may also be provided, and electrically connected to the plurality of cell lead-bus bar contacts A formed as described above, which will be described later in more detail.
  • the cartridge bodies 119 and 129 and the cartridge bus bars 111 and 121 may be integrally inserted and injected.
  • the manufacturing process of the battery module 100 may be simplified.
  • reference numeral 111b is a cartridge bus bar 111 protruding from the cartridge body 119. Further, reference numerals 111a and 111c are cartridge bus bars 111 inserted or recessed in the cartridge body 119.
  • the part 111a recessed in the cartridge body 119 of the cartridge busbar 111 is flat, whereas in the case of FIG. 8 (b), the cartridge body of the cartridge busbar 111
  • the portions 111a and 111c recessed in (119) are formed by bending once.
  • the cartridge busbar 111 formed as shown in FIG. 8 (b) may be easier to prevent departure from the cartridge body 119 than the cartridge busbar 111 formed as shown in FIG. 8 (a).
  • the shape of the cartridge bus bar 111 shown in FIG. 8 is merely exemplary, and the shape of the cartridge bus bar 111 according to the present invention is not limited thereto.
  • the cartridges 110 and 120 may include a first cartridge 110 and a second cartridge 120. 3 to 5, the second cartridge 120 is disposed at both ends of the battery module 100 among the cartridges 110 and 120, and the first cartridge 110 is disposed in the remaining areas Can be At this time, a separator 140 that divides the space of the battery module 100 may be further included.
  • the first cartridge 110 may include a first cartridge body 119 and a first cartridge bus bar 111.
  • the second cartridge 120 may include a second cartridge body 129 and a second cartridge bus bar 121.
  • the first cartridge body 119 may include a first snap protrusion 114 and a first snap groove 113.
  • the second cartridge body 129 may include a second snap groove 123.
  • the combination of the plurality of first cartridges 110, or between the first cartridge 110 and the second cartridge 120, the first snap protrusion 114 and the first snap groove 113, or It may be implemented by a snap fit coupling between the first snap protrusion 114 and the second snap groove 123.
  • the first snap of the any one of the first cartridges 110 may be snap-fit to the first snap groove 113 of the adjacent cartridge 110.
  • the first snap protrusion 114 of any one of the first cartridges 110 is snap-fitted to the second snap groove 123 of the second cartridge 120 Can be.
  • the battery module 100 may further include a bolt 150 that integrally fixes the plurality of cartridges 110 and 120.
  • the cartridge bodies 119 and 129 may be formed with bolt holes 115 and 125 through which the bolt 150 penetrates in the y-axis direction.
  • the separator 140 may also be formed with a bolt hole 145 through which the bolt 150 passes.
  • the plurality of cartridges 110 and 120 accommodating the plurality of battery cells 130 therein are firstly snap-fitted to each other, and secondly bolted by bolts 150 to be securely fixed. .
  • the thermal pad 60 may be disposed under the battery module 100 according to the present invention.
  • the battery module 100 is assembled as a whole Will be described in detail.
  • the ICB 160 is an ICB body 161, an ICB bus bar 170, 180, and a circuit board (PCB, Printed Circuit Board) electrically connected to the ICB bus bar 170, 180. And a connector 164.
  • PCB Printed Circuit Board
  • Each component of the ICB 160 may be disposed or combined on the ICB body 161.
  • the ICB bus bars 170 and 180 are fixed to the ICB body 161, 171 and 181, protruding from the fixed parts 171 and 181, and the cell lead-bus bar contact portion A is inserted. It may include the insertion portion (172, 182).
  • the ICB 160 may include a boss portion 165 protruding perpendicular to a surface facing the fixing portions 171 and 181 of the ICB body 161.
  • the boss portion 165 may protrude from the ICB body 161 in the -x axis direction.
  • the fixing parts 171 and 181 may be formed with through holes 175 and 185 through which the boss part 165 penetrates.
  • the fixing parts 171 and 181 may be formed with through holes 175 and 185 through which the boss part 165 penetrates.
  • three through holes 175 and 185 are formed in each of the fixing parts 171 and 181, but this is only an example.
  • the boss portion 165 may pass through the through-holes 175 and 185 and be heat-sealed with the fixing portions 171 and 181 to be combined with the fixing portions 171 and 181, and then separated by applying heat again. have.
  • the boss portion 165 is formed of a plurality of forks that widen the gap toward the end, and is formed to narrow the gap when an external force is applied, and the fixing portion 171 and the snap Fit can be combined.
  • the insertion portions 172 and 182 may protrude from the fixing portions 171 and 181 in the -x axis direction.
  • the first ICB bus bar 170 includes two inserting portions 172a and 172b, but based on the inserting portion 172a located in the + y axis direction for a brief description.
  • the inserting portion 172a located in the + y axis direction for a brief description.
  • the insertion portion 172a includes a cell press-bus bar contact portion A, a first pressing body 1721, a second pressing body 1722 spaced apart from each other, and the first and second pressing bodies 1721, 1722) may include a connector 1723 connecting each upper end.
  • connection body 1723 can exhibit a function of protecting the cell lead-busbar contact portion A from impact and contamination from the outside.
  • the first and second pressing bodies 1721 and 1722 may be formed to extend in the z-axis direction.
  • the first and second pressing bodies 1721 and 1722 may contact the cartridge busbars 111 and 121 constituting the cell lead-busbar contact portion A. In other words, the first and second pressing bodies 1721 and 1722 may be in contact with the cartridge busbars 111 and 121 constituting the cell lead-busbar contact portion A in the y-axis direction.
  • the cell leads 133 may be sequentially electrically connected to the cartridge busbars 111 and 121 and the first ICB busbar 170.
  • the interval between the first and second pressing bodies 1721, 1722 is greater than the width of the cell lead-busbar contact portion A It can be narrow.
  • the first and second pressing bodies 1721 and 1722 press the cartridge bus bars 111 and 121 largely, thereby leading to the cell lead-
  • the electrical connection of the busbar contacts A can be improved.
  • the improvement of the electrical connection of the cell lead-busbar contact A described above can be achieved in the battery module according to the second or third embodiment of the present invention, which will be described below.
  • the ICB 160 according to the second embodiment of the present invention, one end is connected to any one of the outer surface of the first and second pressing bodies (1721, 1722), the other end A rod 169 that is a fixed end may be further included.
  • the rod 169 may have a cylindrical shape, but is not particularly limited in shape or material.
  • the rod 169 may be disposed along the y-axis direction, and both ends thereof are fixed ends, thereby assisting the first and second pressing bodies 1721 and 1722 to press the cartridge busbars 111 and 121,
  • the electrical connection of the cell lead-busbar contact A can be improved.
  • the first and second pressing bodies 1721 to improve the electrical connection of the cell lead-bus bar contact (A) , 1722) may include reinforcing members (176, 177, 179) on at least one of the surfaces facing each other.
  • the reinforcing members 176, 177, and 179 may be made of materials different from the materials of the first and second pressing bodies 1721 and 1722.
  • the reinforcing member may be a protrusion 176 protruding from the first and second pressing bodies 1721, 1722 to a predetermined height.
  • a plurality of protrusions 176 may be arranged at intersections to improve the electrical connection of the cell lead-bus bar contacts A.
  • the reinforcing member may be a protruding line 177 formed to extend in the z-axis direction of the first and second pressing bodies 1721 and 1722.
  • the protruding lines 177 are spaced apart from each other to improve the electrical connection of the cell lead-bus bar contact portion (A).
  • both the protrusion 176 and the protrusion line 177 can be understood as examples of the protruding member.
  • the reinforcing member may be an electrical conductor 179 attached to the first and second pressing bodies 1721 and 1722.
  • the electrical conductor 179 is formed of a material having a higher electrical conductivity than the first and second pressing bodies 1721 and 1722, thereby improving the electrical connection of the cell lead-bus bar contact portion A.
  • each of the first and second pressing bodies 1721 and 1722 may include first and second entry bodies 1724 and 1725 at the bottom.
  • the distance between the first and second entry bodies 1724 and 1725 may increase as the distance from the first and second pressing bodies 1721 and 1722 respectively.
  • the insertion path is widened, so that it is easy to insert the cell lead-bus bar contact portion A into the insertion portion 172a.
  • the ICB bus bars 170 and 180 may include connection terminals 173 and 183 protruding from the fixing parts 171 and 181 in the + z axis direction.
  • connection terminals 173 and 183 may be electrically connected to the circuit board 163, and a connector 164 for transmitting power to the outside may be installed on the circuit board 163.
  • the electrical energy generated by the battery cell 130 sequentially leads to the cell leads 133, the cartridge busbars 111 and 121, the ICB busbars 170 and 180, the circuit board 163 and the connector 164. It can be passed through and transmitted to the outside.
  • the ICB bus bars 170 and 180 may include a first ICB bus bar 170 and a second ICB bus bar 180.
  • the second ICB bus bar 180 is located at both ends of the ICB 160, and the rest may be the first ICB bus bar 170.
  • first ICB bus bar 170 is provided with two inserts 172a and 172b
  • second ICB bus bar 180 is provided with one insert 182.
  • a plurality of ICB busbars 170 and 180 are provided in one ICB 160 so that a plurality of cell lead-busbar contacts A can be electrically connected simultaneously.
  • the ICB 160 may include snap projections 166 and 167 at the upper and lower ends.
  • the cartridges 110 and 120 engage the snap holes 116, 117, 126, and 127 engaged with the snap projections 166, 167 and snap-fitted. It can contain.
  • the ICB 160 is spaced apart from the second cartridge 120 by a predetermined distance in the + x axis direction, and the cell lead-busbar contact portion A is gradually inserted and moves in the -z axis direction.
  • the snap projection 166 provided on the upper portion of the ICB 160 moves in the -x axis direction and is inserted into the snap hole 126 provided on the upper portion of the second cartridge 120 to be snap-fit
  • the snap protrusion 167 provided at the lower end of the ICB 160 also moves in the -x axis direction and is inserted into the snap hole 127 provided at the lower end of the second cartridge 120 to be snap-fit.
  • the ICB 160 into which the cell lead-bus bar contact portion A is inserted may be firmly fixed to the second cartridge 120.
  • the snap projection 166 provided at the upper end of the ICB 160 protrudes in the -x axis direction from the ICB 160 and the snap projection provided at the lower end of the ICB 160 ( 167) may protrude in the direction from the ICB 160 toward the inside of the ICB 160 among the y-axis directions.
  • the snap-fit engagement direction at the upper end of the ICB 160 may intersect at a right angle to the snap-fit engagement direction at the lower end of the ICB 160. Thereby, the ICB 160 can be more firmly fixed to the cartridges 110 and 120.
  • Vehicle 10 Battery pack
  • battery module 110 first cartridge
  • first cartridge busbar 121 second cartridge busbar
  • PCB 165 boss section

Abstract

The present invention relates to a battery module comprising: multiple battery cells stacked together, each of the battery cells comprising a cell body and a cell lead protruding from the cell body; multiple cartridges stacked together, each of the cartridges comprising a cartridge body in which the cell body is disposed, and a cartridge bus bar protruding from the cartridge body and coming in contact with the cell lead; and an interconnect circuit board (ICB) comprising multiple ICB bus bars each of which presses the cartridge bus bar such that the cartridge bus bar comes into close contact with the cell lead, and a circuit board electrically connected to the ICB bus bars, wherein the cartridge bus bar comes in contact with each of one side and the other opposite side of the cell lead to form a cell lead-bus bar contact.

Description

배터리 모듈Battery module
본 발명은 배터리 모듈에 관한 것으로, 더욱 상세하게는 셀 리드의 변형없이 무용접 방식으로 배터리 셀의 전력을 연결할 수 있는 배터리 모듈에 관한 것이다.The present invention relates to a battery module, and more particularly, to a battery module capable of connecting the power of the battery cells in a non-welding manner without deformation of the cell leads.
최근 차량의 동력원으로 이차전지를 사용하는 경우가 많아지고 있다.2. Description of the Related Art Recently, secondary batteries are increasingly used as a power source for vehicles.
이차전지가 차량의 동력원으로 사용되기 위해서는 고출력 대용량이 요구되므로, 다수의 소형 이차전지(단위전지)들을 직렬 및/또는 병렬로 연결한 구조의 중대형 배터리 모듈을 개발할 필요가 있다.In order to use a secondary battery as a power source for a vehicle, a high-output large-capacity is required, so it is necessary to develop a medium-to-large battery module having a structure in which a plurality of small secondary batteries (unit cells) are connected in series and / or in parallel.
종래 기술에 따른 배터리 모듈은, 소형 이차전지들을 직렬 및/또는 병렬로 연결하는 방법으로서 레이저 용접, 초음파 용접 등의 기술을 사용하였으나, 용접에 의한 전극단자 접합 방식은 제조 및 조립 공정이 복잡하고, 공정 비용이 증가되며, 유지 보수가 힘든 문제가 있었다.The battery module according to the prior art uses techniques such as laser welding and ultrasonic welding as a method of connecting small secondary batteries in series and / or in parallel, but the welding and electrode terminal bonding method is complicated in manufacturing and assembly processes, There was a problem that the process cost is increased and maintenance is difficult.
이와 같은 문제를 해결하고자, 전극단자를 절곡 변형 시켜 용접 없이 전극단자를 전력 전달체에 연결하는 시도가 있었으나, 변형에 따른 전극단자 손상이 야기되는 문제가 있었다.In order to solve this problem, attempts have been made to flexibly deform the electrode terminals to connect the electrode terminals to the power transmission body without welding, but there is a problem that electrode terminal damage is caused by deformation.
본 발명이 해결하고자 하는 제1 과제는, 무용접 방식으로 배터리 셀의 전력을 연결할 수 있는 배터리 모듈을 제공하는 데 있다.The first problem to be solved by the present invention is to provide a battery module that can connect the power of the battery cells in a weldingless manner.
본 발명이 해결하고자 하는 제2 과제는, 배터리 모듈의 조립 및 분리 간에 셀 리드의 손상을 최소화할 수 있는 배터리 모듈을 제공하는 데 있다.The second problem to be solved by the present invention is to provide a battery module capable of minimizing damage to a cell lead between assembly and removal of the battery module.
본 발명이 해결하고자 하는 제3 과제는, 조립 및 분리가 용이하여 손상된 배터리 셀의 교체가 용이한 배터리 모듈을 제공하는 데 있다.The third problem to be solved by the present invention is to provide a battery module that is easy to assemble and remove and replaces damaged battery cells.
본 발명이 해결하고자 하는 제4 과제는, 배터리 셀의 전기적 연결이 향상된 배터리 모듈을 제공하는 데 있다. A fourth problem to be solved by the present invention is to provide a battery module with improved electrical connection of battery cells.
본 발명의 과제들은 이상에서 언급한 과제들로 제한되지 않으며, 언급되지 않은 또 다른 과제들은 아래의 기재로부터 통상의 기술자에게 명확하게 이해될 수 있을 것이다.The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.
상기 과제를 해결하기 위하여, 본 발명에 따른 배터리 모듈은, 각각이 셀 바디와, 상기 셀 바디로부터 돌출되는 셀 리드를 포함하고, 상호 적층되는 복수 개의 배터리 셀; 각각이 상기 셀 바디가 내부에 배치되는 카트리지 바디와, 상기 카트리지 바디로부터 돌출되어 상기 셀 리드와 접촉되는 카트리지 버스바를 포함하고, 상호 적층되는 복수 개의 카트리지; 및 상기 셀 리드와 카트리지 버스바가 밀착되도록 상기 카트리지 버스바를 가압하는 복수 개의 ICB 버스바와, 상기 ICB 버스바와 전기적으로 연결되는 회로기판을 포함하는 ICB(Interconnect Circuit Board)를 포함하고, 상기 셀 리드의 일측면과 상기 일측면에 반대되는 타측면에는, 상기 카트리지 버스바가 각각 접촉되어 셀 리드-버스바 접촉부를 형성한다.In order to solve the above problems, the battery module according to the present invention, each comprising a cell body, a cell lead protruding from the cell body, a plurality of battery cells stacked on each other; A plurality of cartridges, each of which includes a cartridge body in which the cell body is disposed, and a cartridge bus bar protruding from the cartridge body and contacting the cell lead; And an ICB (Interconnect Circuit Board) including a plurality of ICB busbars that pressurize the cartridge busbar so that the cell leads and cartridge busbars are in close contact, and a circuit board electrically connected to the ICB busbars. On the side and the other side opposite to the one side, the cartridge busbars are respectively contacted to form a cell lead-busbar contact.
상기 ICB 버스바는, 상기 ICB에 고정되는 고정부; 및 상기 고정부로부터 돌출되고, 상기 셀 리드-버스바 접촉부가 삽입되는 삽입부를 포함할 수 있다.The ICB bus bar includes a fixing part fixed to the ICB; And an insertion portion protruding from the fixing portion and into which the cell lead-bus bar contact portion is inserted.
상기 삽입부는, 상기 셀 리드-버스바 접촉부를 사이에 두고 서로 이격된 제1 및 제2 가압체; 상기 제1 및 제2 가압체 각각의 상단을 연결하는 연결체를 포함할 수 있다.The insertion portion, the cell lead-bus bar first and second pressing bodies spaced apart from each other with the contact portion therebetween; It may include a connecting body for connecting the upper end of each of the first and second pressing bodies.
상기 ICB는, 상단부 및 하단부에 스냅돌기를 포함하고, 상기 카트리지는, 상기 스냅돌기와 맞물려 스냅핏 결합되는 스냅홀을 포함할 수 있다.The ICB includes a snap protrusion at an upper end and a lower end, and the cartridge may include a snap hole engaged with the snap protrusion and snap-fitted.
상기 카트리지 바디는, 스냅돌편 및 스냅홈 중 적어도 하나를 포함하고, 상기 복수 개의 카트리지는, 상기 스냅돌편 및 스냅홈에 의한 스냅핏 결합으로 상호 결합될 수 있다.The cartridge body may include at least one of a snap protrusion and a snap groove, and the plurality of cartridges may be mutually coupled by snap-fit engagement by the snap protrusion and the snap groove.
본 발명에 따르면 다음과 같은 효과가 하나 혹은 그 이상 있다.According to the present invention, there are one or more of the following effects.
첫째, ICB 버스바가 카트리지 버스바를 가압함으로써 셀 리드-버스바 접촉부가 밀착되어 무용접 방식으로 배터리 셀의 전력을 연결할 수 있다.First, as the ICB busbar presses the cartridge busbar, the cell lead-busbar contacts are in close contact to connect the power of the battery cells in a weldingless manner.
둘째, 셀 리드는 절곡 변형 없이 카트리지 버스바와 밀착됨으로써 배터리 모듈의 조립 및 분리 간에 상기 셀 리드 손상이 최소화될 수 있다.Second, the cell lead is in close contact with the cartridge bus bar without bending deformation, so that damage to the cell lead between assembly and removal of the battery module can be minimized.
셋째, 복수 개의 셀 리드-버스바 접촉부 각각이 복수 개의 ICB 버스바에 삽입됨으로써 배터리 모듈의 조립 및 분리가 용이할 수 있다.Third, each of the plurality of cell lead-bus bar contacts may be inserted into the plurality of ICB bus bars to facilitate assembly and removal of the battery module.
넷째, ICB 버스바가 셀 리드-버스바 접촉부를 가압함으로써 배터리 셀의 전기적 연결이 향상될 수 있다.Fourth, the electrical connection of the battery cells can be improved by the ICB busbar pressing the cell lead-busbar contacts.
도 1은 본 발명에 따른 배터리 팩을 포함하는 차량의 개념도이다.1 is a conceptual diagram of a vehicle including a battery pack according to the present invention.
도 2는 본 발명에 따른 배터리 모듈을 포함하는 배터리 팩의 분해 사시도이다.2 is an exploded perspective view of a battery pack including a battery module according to the present invention.
도 3은 본 발명에 따른 배터리 모듈의 사시도이다.3 is a perspective view of a battery module according to the present invention.
도 4는 본 발명에 따른 배터리 모듈의 분해 사시도이다.4 is an exploded perspective view of a battery module according to the present invention.
도 5는 본 발명에 따른 배터리 모듈의 구성을 간략하게 도시한 도면이다.5 is a diagram briefly showing the configuration of a battery module according to the present invention.
도 6은 본 발명에 따른 제1 카트리지의 사시도이다.6 is a perspective view of a first cartridge according to the present invention.
도 7은 본 발명에 따른 제2 카트리지의 사시도이다.7 is a perspective view of a second cartridge according to the present invention.
도 8은 본 발명에 따른 카트리지 버스바의 사시도이다.8 is a perspective view of a cartridge bus bar according to the present invention.
도 9는 본 발명에 따른 셀 리드와 카트리지 버스바 간의 접촉되는 모습을 도시한 도면이다.9 is a view showing a contact state between the cell lead and the cartridge bus bar according to the present invention.
도 10은 본 발명에 따른 셀 리드-버스바 접촉부에 ICB가 조립되는 모습을 도시한 도면이다.10 is a view showing a state in which the ICB is assembled to the cell lead-bus bar contact according to the present invention.
도 11은 본 발명에 따른 ICB 버스바의 단면도이다.11 is a cross-sectional view of the ICB bus bar according to the present invention.
도 12는 본 발명에 따른 ICB의 사시도이다.12 is a perspective view of an ICB according to the present invention.
도 13은 본 발명에 따른 제1 및 제2 ICB 버스바의 사시도이다.13 is a perspective view of first and second ICB busbars according to the present invention.
도 14는 본 발명에 따른 보스부가 고정부에 결합되는 모습을 도시한 단면도이다.14 is a cross-sectional view showing a state in which the boss portion is coupled to the fixing portion according to the present invention.
도 15는 본 발명에 따른 ICB가 카트리지에 결합되는 모습을 도시한 측면도이다.15 is a side view showing a state in which the ICB according to the present invention is coupled to the cartridge.
도 16은 본 발명의 다른 실시예에 따른 ICB의 사시도이다.16 is a perspective view of an ICB according to another embodiment of the present invention.
도 17은 본 발명의 또 다른 실시예에 따른 가압체의 일면을 도시한 도면이다.17 is a view showing one surface of a pressing body according to another embodiment of the present invention.
본 발명은, 도 1 및 2에 도시된 각각이 전방(front), 후방(rear), 상방(upper), 하방(lower), 좌방(left) 및 우방(right)로 명명된 3차원 좌표계로 설명될 수 있다. The present invention is described in the three-dimensional coordinate system, respectively, shown in Figures 1 and 2, named as front, rear, upper, lower, left and right. Can be.
본 발명은, 도 3 등에 도시된 서로 직교하는 x축, y축 및 z축에 의한 공간 직교 좌표계를 기준으로 설명될 수도 있다. 본 명세서에서, 상하 방향을 Z축 방향으로 하고, 배터리 셀의 길이 방향을 x축 방향으로 하여 x축, y축 및 z축을 정의한다. 각 축 방향(x축 방향, y축 방향, z축 방향)은, 각 축이 뻗어나가는 양쪽 방향을 의미한다. 각 축 방향의 앞에 '+'부호가 붙는 것(+x축 방향, +y축 방향, +z축 방향)은, 각 축이 뻗어나가는 양쪽 방향 중 어느 한 방향인 양의 방향을 의미한다. 각 축방향의 앞에 '-'부호가 붙는 것(-x축 방향, -y축 방향, -z축 방향)은, 각 축이 뻗어나가는 양쪽 방향 중 나머지 한 방향인 음의 방향을 의미한다.The present invention may be described based on a spatial Cartesian coordinate system by x-axis, y-axis, and z-axis orthogonal to each other shown in FIG. 3 and the like. In this specification, the x-axis, y-axis, and z-axis are defined with the vertical direction as the Z-axis direction and the longitudinal direction of the battery cell as the x-axis direction. Each axial direction (x-axis direction, y-axis direction, z-axis direction) means both directions in which each axis extends. The '+' sign in front of each axis direction (+ x-axis direction, + y-axis direction, + z-axis direction) means a positive direction which is one of both directions in which each axis extends. The '-' sign in front of each axial direction (-x-axis direction, -y-axis direction, -z-axis direction) means a negative direction, which is the other of the two directions in which each axis extends.
제1, 제2 등과 같이 서수를 포함하는 용어는 다양한 구성요소들을 설명하는데 사용될 수 있지만, 상기 구성요소들은 상기 용어들에 의해 한정되지는 않는다. 상기 용어들은 하나의 구성요소를 다른 구성요소로부터 구별하는 목적으로만 사용된다.Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.
어떤 구성요소가 다른 구성요소에 "연결되어" 있다거나 "접속되어" 있다고 언급된 때에는, 그 다른 구성요소에 직접적으로 연결되어 있거나 또는 접속되어 있을 수도 있지만, 중간에 다른 구성요소가 존재할 수도 있다고 이해되어야 할 것이다. 반면에, 어떤 구성요소가 다른 구성요소에 "직접 연결되어" 있다거나 "직접 접속되어" 있다고 언급된 때에는, 중간에 다른 구성요소가 존재하지 않는 것으로 이해되어야 할 것이다.When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but there may be other components in between. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.
단수의 표현은 문맥상 명백하게 다르게 뜻하지 않는 한, 복수의 표현을 포함한다.Singular expressions include plural expressions unless the context clearly indicates otherwise.
본 출원에서, "포함한다" 또는 "가지다" 등의 용어는 명세서상에 기재된 특징, 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것이 존재함을 지정하려는 것이지, 하나 또는 그 이상의 다른 특징들이나 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것들의 존재 또는 부가 가능성을 미리 배제하지 않는 것으로 이해되어야 한다.In this application, terms such as "comprises" or "have" are intended to indicate the presence of features, numbers, steps, actions, components, parts or combinations thereof described in the specification, but one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.
이하에서는, 도 1 및 도 2를 참고하여 본 발명에 따른 배터리 모듈을 포함하는 배터리 팩에 대하여 설명하도록 한다.Hereinafter, a battery pack including a battery module according to the present invention will be described with reference to FIGS. 1 and 2.
도 1은 본 발명에 따른 배터리 팩을 포함하는 차량의 개념도이다. 도 2는 본 발명에 따른 배터리 모듈을 포함하는 배터리 팩의 분해 사시도이다.1 is a conceptual diagram of a vehicle including a battery pack according to the present invention. 2 is an exploded perspective view of a battery pack including a battery module according to the present invention.
도 1을 참고하면, 본 발명에 따른 차량(1)은 차량(1)을 구동하는 동력을 생성하는 모터(5)를 포함할 수 있다. 차량(1)은 전기에너지를 생성하는 배터리 팩(10)을 포함할 수 있다. 모터(5)는 배터리 팩(10)으로부터 전기에너지를 전달받아 작동되며, 전기에너지를 운동에너지로 변환할 수 있다.Referring to FIG. 1, the vehicle 1 according to the present invention may include a motor 5 that generates power to drive the vehicle 1. The vehicle 1 may include a battery pack 10 that generates electrical energy. The motor 5 is operated by receiving electric energy from the battery pack 10 and can convert electric energy into kinetic energy.
배터리 팩(10)은 차체 바닥의 중앙부에 위치할 수 있다. 배터리 팩(10)은 차량(1)의 전방 회전축과 후방 회전축 사이에 배치될 수 있다. The battery pack 10 may be located at the center of the bottom of the vehicle body. The battery pack 10 may be disposed between the front rotation axis and the rear rotation axis of the vehicle 1.
배터리 팩(10)은 배터리 용량을 증가시키는 충전과 배터리 용량을 감소시키는 방전을 반복할 수 있다. 배터리 팩(10)의 충전 및 방전 시 열이 발생될 수 있다.The battery pack 10 may repeat charging to increase the battery capacity and discharging to decrease the battery capacity. When charging and discharging the battery pack 10, heat may be generated.
도 2를 참고하면, 배터리 팩(10)은 외형을 형성하는 케이싱(20)을 포함할 수 있다. Referring to FIG. 2, the battery pack 10 may include a casing 20 forming an outer shape.
케이싱(20)은 배터리 모듈(100)의 하중을 지지하는 트레이(22)를 포함할 수 있다. 케이싱(20)은 트레이(22)와 결합되어 배터리 모듈(100)을 덮는 커버(21)를 포함할 수 있다.The casing 20 may include a tray 22 that supports the load of the battery module 100. The casing 20 may include a cover 21 coupled to the tray 22 to cover the battery module 100.
케이싱(20)은 트레이(22)의 강성을 보강하고, 히트싱크(40)의 하중을 트레이(22)에 고르게 분배하는 지지패널(25)을 포함할 수 있다.The casing 20 may include a support panel 25 that reinforces the rigidity of the tray 22 and distributes the load of the heat sink 40 evenly on the tray 22.
배터리 팩(10)은 배터리 모듈(100)에서 발생한 열에너지를 흡수하는 냉각수가 유동되는 히트싱크(40)를 포함할 수 있다. 히트싱크(40)는 열전달계수가 높은 소재로 형성되며, 내부에 냉각수가 유동될 수 있다.The battery pack 10 may include a heat sink 40 through which cooling water absorbing thermal energy generated in the battery module 100 flows. The heat sink 40 is formed of a material having a high heat transfer coefficient, and cooling water may flow therein.
배터리 팩(10)은 배터리 모듈(100)의 열 에너지를 히트싱크(40)로 전달하는 써멀패드(thermal pad)(60)를 포함할 수 있다. 써멀패드(60)는 열전도 패드일 수 있다. 써멀패드(60)는 열전도율이 높은 소재로 형성될 수 있다.The battery pack 10 may include a thermal pad 60 that transfers heat energy of the battery module 100 to the heat sink 40. The thermal pad 60 may be a thermal conductive pad. The thermal pad 60 may be formed of a material having high thermal conductivity.
배터리 팩(10)은 배터리 모듈(100)의 상측에 배치되어 커버(21)를 지지하는 브라켓(80)을 포함할 수 있다.The battery pack 10 may include a bracket 80 disposed on an upper side of the battery module 100 to support the cover 21.
배터리 팩(10)은 전기에너지를 발생하는 셀을 포함하는 배터리 모듈(100)을 포함할 수 있다. 배터리 모듈(100)은 배터리 팩(10)에 복수개가 구비될 수 있다.The battery pack 10 may include a battery module 100 including cells generating electric energy. A plurality of battery modules 100 may be provided in the battery pack 10.
배터리 팩(10)에서 복수의 배터리 모듈(100)은 전기적으로 연결될 수 있다. 배터리 팩(10)에서 복수의 배터리 모듈(100)은 동일 평면상에 배치될 수 있다. 배터리 팩(10)에서 복수의 배터리 모듈(100)은 상하로 배치될 수 있다.In the battery pack 10, the plurality of battery modules 100 may be electrically connected. The plurality of battery modules 100 in the battery pack 10 may be disposed on the same plane. In the battery pack 10, a plurality of battery modules 100 may be arranged up and down.
이하에서는, 도 3 내지 도 15를 참고하여 본 발명의 일 실시예에 따른 배터리 모듈(100)을 구체적으로 설명하도록 한다.Hereinafter, the battery module 100 according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 to 15.
도 3은 본 발명에 따른 배터리 모듈의 사시도이다. 도 4는 본 발명에 따른 배터리 모듈의 분해 사시도이다. 도 5는 본 발명에 따른 배터리 모듈의 구성을 간략하게 도시한 도면이다. 도 6은 본 발명에 따른 제1 카트리지의 사시도이다. 도 7은 본 발명에 따른 제2 카트리지의 사시도이다. 도 8은 본 발명에 따른 카트리지 버스바의 사시도이다. 도 9는 본 발명에 따른 셀 리드와 카트리지 버스바 간의 접촉되는 모습을 도시한 도면이다. 도 10은 본 발명에 따른 셀 리드-버스바 접촉부에 ICB가 조립되는 모습을 도시한 도면이다. 도 11은 본 발명에 따른 ICB 버스바의 단면도이다. 도 12는 본 발명에 따른 ICB의 사시도이다. 도 13은 본 발명에 따른 제1 및 제2 ICB 버스바의 사시도이다. 도 14는 본 발명에 따른 보스부가 고정부에 결합되는 모습을 도시한 단면도이다. 도 15는 본 발명에 따른 ICB가 카트리지에 결합되는 모습을 도시한 측면도이다.3 is a perspective view of a battery module according to the present invention. 4 is an exploded perspective view of a battery module according to the present invention. 5 is a diagram briefly showing the configuration of a battery module according to the present invention. 6 is a perspective view of a first cartridge according to the present invention. 7 is a perspective view of a second cartridge according to the present invention. 8 is a perspective view of a cartridge bus bar according to the present invention. 9 is a view showing a contact state between the cell lead and the cartridge bus bar according to the present invention. 10 is a view showing a state in which the ICB is assembled to the cell lead-bus bar contact according to the present invention. 11 is a cross-sectional view of the ICB bus bar according to the present invention. 12 is a perspective view of an ICB according to the present invention. 13 is a perspective view of first and second ICB busbars according to the present invention. 14 is a cross-sectional view showing a state in which the boss portion is coupled to the fixing portion according to the present invention. 15 is a side view showing a state in which the ICB according to the present invention is coupled to the cartridge.
본 발명의 일 실시예에 따른 배터리 모듈(100)은, 배터리 셀(130), 카트리지(110, 120), ICB(Interconnect Circuit Board)(160)를 포함한다.The battery module 100 according to an embodiment of the present invention includes a battery cell 130, cartridges 110 and 120, and an ICB (Interconnect Circuit Board) 160.
배터리 셀(130)은 전기 에너지를 생성할 수 있다. 배터리 셀(130)이 전기 에너지를 생성하는 구조 및 방법은 널리 알려진 이차전지의 그것과 다르지 않으므로, 자세한 설명은 생략하도록 한다.The battery cell 130 may generate electrical energy. The structure and method of generating the electric energy by the battery cell 130 is not different from that of the well-known secondary battery, so a detailed description thereof will be omitted.
도 4 및 도 5에 도시된 바와 같이, 배터리 셀(130)은 복수 개가 상호 적층될 수 있다. 배터리 셀(130)은 y축 방향으로 상호 적층될 수 있다.4 and 5, a plurality of battery cells 130 may be stacked with each other. The battery cells 130 may be stacked with each other in the y-axis direction.
복수 개의 배터리 셀(130) 각각은, 셀 바디(131)와, 셀 바디(131)로부터 돌출되는 셀 리드(133)를 포함할 수 있다. 셀 리드(133)는 셀 바디(131)로부터 x축 방향으로 돌출될 수 있다.Each of the plurality of battery cells 130 may include a cell body 131 and a cell lead 133 protruding from the cell body 131. The cell lead 133 may protrude from the cell body 131 in the x-axis direction.
셀 리드(133)는 이차전지에서의 전극단자로 이해될 수 있다.The cell lead 133 may be understood as an electrode terminal in a secondary battery.
셀 리드(133)는 셀 바디(131)의 적어도 일측으로부터 돌출될 수 있다. 일 예로써, 도 4에 도시된 바와 같이, 셀 바디(131)의 양측 각각으로부터 셀 리드(133)가 돌출될 수 있다. 이 경우, 후술하는 카트리지 버스바(111, 121)도 셀 리드(133)에 대응하여 카트리지 바디(119, 129)의 양측 각각으로부터 돌출될 수 있다.The cell lead 133 may protrude from at least one side of the cell body 131. As an example, as shown in FIG. 4, the cell leads 133 may protrude from each side of the cell body 131. In this case, the cartridge bus bars 111 and 121, which will be described later, may also protrude from both sides of the cartridge bodies 119 and 129 corresponding to the cell leads 133.
본 발명에 따른 셀 리드(133)는 셀 바디(131)로부터 돌출되는 것 외에, 후술하는 버스바와의 접촉을 위해 절곡되거나 변형되지 않는다. 이로써, 셀 리드(133)의 손상을 방지할 수 있고, 보다 상세히는 후술하도록 한다.In addition to protruding from the cell body 131, the cell lead 133 according to the present invention is not bent or deformed for contact with a bus bar described later. Accordingly, damage to the cell lead 133 can be prevented, and will be described later in more detail.
배터리 셀(130)은 카트리지(110, 120)의 내부에 배치될 수 있다.The battery cells 130 may be disposed inside the cartridges 110 and 120.
도 3 및 도 5에 도시된 바와 같이, 카트리지(110, 120)는 복수 개가 상호 적층될 수 있다. 카트리지(110, 120)는 y축 방향으로 상호 적층될 수 있다.3 and 5, a plurality of cartridges 110 and 120 may be stacked with each other. The cartridges 110 and 120 may be stacked mutually in the y-axis direction.
복수 개의 카트리지(110, 120) 각각은, 셀 바디(131)가 내부에 배치되는 카트리지 바디(119, 129)와, 카트리지 바디(119, 129)로부터 돌출되는 카트리지 버스바(111, 121)를 포함할 수 있다. 카트리지 버스바(111, 121)는 카트리지 바디(119, 129)로부터 x축 방향으로 돌출될 수 있다.Each of the plurality of cartridges 110 and 120 includes cartridge bodies 119 and 129 in which the cell body 131 is disposed, and cartridge bus bars 111 and 121 protruding from the cartridge bodies 119 and 129. can do. The cartridge bus bars 111 and 121 may protrude from the cartridge bodies 119 and 129 in the x-axis direction.
카트리지 버스바(111, 121)는 전극단자인 셀 리드(133)와 접촉됨으로써 전기적으로 연결될 수 있다. 즉, 배터리 셀(130)에서 생성된 전기 에너지는 셀 리드(133)와 카트리지 버스바(111, 121)의 전기적 연결을 통해 외부로 전달될 수 있다.The cartridge bus bars 111 and 121 may be electrically connected by contacting the cell lead 133 which is an electrode terminal. That is, the electrical energy generated by the battery cell 130 may be transmitted to the outside through the electrical connection between the cell lead 133 and the cartridge busbars 111 and 121.
도 9를 참고하면, 셀 리드(133)의 일측면과 상기 일측면에 반대되는 타측면에는, 카트리지 버스바(111, 121)가 각각 접촉되어 셀 리드-버스바 접촉부(A)를 형성할 수 있다.Referring to FIG. 9, on one side of the cell lead 133 and the other side opposite to the one side, the cartridge busbars 111 and 121 are respectively contacted to form the cell lead-busbar contact portion A. have.
보다 구체적으로, 도 9(a)-(c)에 도시된 바와 같이, 셀 리드(133)의 상기 일측면이 -y축 방향으로 카트리지 버스바(121)에 접촉되고, 셀 리드(133)의 상기 타측면이 +y축 방향으로 카트리지 버스바(111)에 접촉되어 셀 리드-버스바 접촉부(A)를 형성할 수 있다.More specifically, as shown in Figure 9 (a)-(c), the one side of the cell lead 133 is in contact with the cartridge bus bar 121 in the -y axis direction, the cell lead 133 The other side may contact the cartridge busbar 111 in the + y-axis direction to form a cell lead-busbar contact portion A.
이때, 셀 리드(133)의 양측면에 접촉되는 카트리지 버스바(111, 121) 사이의 간격은, 카트리지 버스바(121)가 접촉되기 이전의 셀 리드(133)의 두께보다 좁도록 할 수 있다. 이로써, 셀 리드-버스바 접촉부(A)의 전기적 연결이 향상될 수 있다.At this time, the gap between the cartridge busbars 111 and 121 contacting both sides of the cell lead 133 may be made smaller than the thickness of the cell lead 133 before the cartridge busbar 121 contacts. Thereby, the electrical connection of the cell lead-busbar contact portion A can be improved.
이를 구현하기 위해, 배터리 셀(130)을 사이에 둔 인접하는 카트리지(110, 120) 간의 견고한 결합이 필요하며, 이는 후술하는 스냅돌편(114), 스냅홈(113, 123)의 스냅핏(Snap-fit) 결합에 의해 가능하며 보다 상세히는 후술하도록 한다.In order to implement this, a solid coupling between adjacent cartridges 110 and 120 with the battery cell 130 therebetween is required, which is described later in the snap protrusions 114 and snap grooves 113 and 123. -fit) and it will be described later in more detail.
상기한 대로, 본 발명은 복수 개의 배터리 셀(130) 및 복수 개의 카트리지(110, 120)을 포함하므로, 셀 리드-버스바 접촉부(A)도, 도 3 등에 도시된 바와 같이 복수 개가 형성될 수 있다.As described above, since the present invention includes a plurality of battery cells 130 and a plurality of cartridges 110 and 120, a plurality of cell lead-bus bar contacts A may also be formed as shown in FIG. 3 and the like. have.
후술하는 ICB 버스바(170, 180)도 복수 개가 구비되어, 이와 같이 형성된 복수 개의 셀 리드-버스바 접촉부(A)에 전기적으로 연결될 수 있으며 보다 상세히는 후술하도록 한다.A plurality of ICB bus bars 170 and 180, which will be described later, may also be provided, and electrically connected to the plurality of cell lead-bus bar contacts A formed as described above, which will be described later in more detail.
도 6 및 도 7에 도시된 바와 같이, 카트리지 바디(119, 129)와 카트리지 버스바(111, 121)는 일체로서 인서트 사출될 수 있다. 이로써 배터리 모듈(100)의 제작 공정이 간단해질 수 있다.6 and 7, the cartridge bodies 119 and 129 and the cartridge bus bars 111 and 121 may be integrally inserted and injected. Thus, the manufacturing process of the battery module 100 may be simplified.
도 8에서 부호 111b가 카트리지 바디(119)로부터 돌출되는 카트리지 버스바(111)이다. 또한, 부호 111a, 111c가 카트리지 바디(119)에 삽입 또는 함몰되는 카트리지 버스바(111)이다.In Fig. 8, reference numeral 111b is a cartridge bus bar 111 protruding from the cartridge body 119. Further, reference numerals 111a and 111c are cartridge bus bars 111 inserted or recessed in the cartridge body 119.
도 8(a)의 경우 카트리지 버스바(111) 중 카트리지 바디(119)에 함몰된 부분(111a)이 평평하게 되어 있는 데 반해, 도 8(b)의 경우 카트리지 버스바(111) 중 카트리지 바디(119)에 함몰된 부분(111a, 111c)이 한번 절곡되어 형성되어 있다.In the case of FIG. 8 (a), the part 111a recessed in the cartridge body 119 of the cartridge busbar 111 is flat, whereas in the case of FIG. 8 (b), the cartridge body of the cartridge busbar 111 The portions 111a and 111c recessed in (119) are formed by bending once.
도 8(b)와 같이 형성된 카트리지 버스바(111)는, 도 8(a)와 같이 형성된 카트리지 버스바(111)에 비해 카트리지 바디(119)로부터의 이탈 방지에 용이할 수 있다.The cartridge busbar 111 formed as shown in FIG. 8 (b) may be easier to prevent departure from the cartridge body 119 than the cartridge busbar 111 formed as shown in FIG. 8 (a).
다만, 도 8에 도시된 카트리지 버스바(111)의 형상은 예시적인 것일 뿐, 본 발명에 따른 카트리지 버스바(111)의 형상이 이것으로 한정되는 것은 아니다.However, the shape of the cartridge bus bar 111 shown in FIG. 8 is merely exemplary, and the shape of the cartridge bus bar 111 according to the present invention is not limited thereto.
이하에서는, 복수 개의 카트리지(110, 120)가 상호 결합되는 구성에 대해 구체적으로 설명하도록 한다.Hereinafter, a configuration in which the plurality of cartridges 110 and 120 are mutually coupled will be described in detail.
카트리지(110, 120)는 제1 카트리지(110) 및 제2 카트리지(120)를 포함할 수 있다. 도 3 내지 도 5에 도시된 바와 같이, 카트리지(110, 120) 중 배터리 모듈(100)의 양 끝단에 배치되는 것이 제2 카트리지(120)이고, 나머지 영역에 배치되는 것이 제1 카트리지(110)일 수 있다. 이때, 배터리 모듈(100)의 공간을 구획하는 세퍼레이터(separator)(140)가 더 포함될 수 있다.The cartridges 110 and 120 may include a first cartridge 110 and a second cartridge 120. 3 to 5, the second cartridge 120 is disposed at both ends of the battery module 100 among the cartridges 110 and 120, and the first cartridge 110 is disposed in the remaining areas Can be At this time, a separator 140 that divides the space of the battery module 100 may be further included.
제1 카트리지(110)는 제1 카트리지 바디(119)와, 제1 카트리지 버스바(111)를 포함할 수 있다. 제2 카트리지(120)는 제2 카트리지 바디(129)와, 제2 카트리지 버스바(121)를 포함할 수 있다.The first cartridge 110 may include a first cartridge body 119 and a first cartridge bus bar 111. The second cartridge 120 may include a second cartridge body 129 and a second cartridge bus bar 121.
도 6에 도시된 바와 같이, 제1 카트리지 바디(119)는 제1 스냅돌편(114)과 제1 스냅홈(113)을 포함할 수 있다.6, the first cartridge body 119 may include a first snap protrusion 114 and a first snap groove 113.
도 7에 도시된 바와 같이, 제2 카트리지 바디(129)는 제2 스냅홈(123)을 포함할 수 있다.As illustrated in FIG. 7, the second cartridge body 129 may include a second snap groove 123.
이때, 복수 개의 제1 카트리지(110) 상호 간, 또는 제1 카트리지(110)와 제2 카트리지(120) 간의 결합은, 상기한 제1 스냅돌편(114)과 제1 스냅홈(113), 또는 제1 스냅돌편(114)과 제2 스냅홈(123) 간의 스냅핏 결합에 의해 구현될 수 있다.At this time, the combination of the plurality of first cartridges 110, or between the first cartridge 110 and the second cartridge 120, the first snap protrusion 114 and the first snap groove 113, or It may be implemented by a snap fit coupling between the first snap protrusion 114 and the second snap groove 123.
보다 구체적으로, 도 6의 A-A 단면도에 도시된 바와 같이, 어느 하나의 제1 카트리지(110)가 이와 인접한 카트리지(110)와 결합하는 경우, 상기 어느 하나의 제1 카트리지(110)의 제1 스냅돌편(114)이, 상기 인접한 카트리지(110)의 제1 스냅홈(113)에 스냅핏 결합될 수 있다.More specifically, as shown in the AA sectional view of FIG. 6, when any one of the first cartridges 110 engages the cartridge 110 adjacent thereto, the first snap of the any one of the first cartridges 110 The protrusion 114 may be snap-fit to the first snap groove 113 of the adjacent cartridge 110.
또한, 도 7의 B-B 단면도에 도시된 바와 같이, 어느 하나의 제1 카트리지(110)의 제1 스냅돌편(114)이, 제2 카트리지(120)의 제2 스냅홈(123)에 스냅핏 결합될 수 있다.In addition, as shown in the cross-sectional view BB of FIG. 7, the first snap protrusion 114 of any one of the first cartridges 110 is snap-fitted to the second snap groove 123 of the second cartridge 120 Can be.
한편, 도 4 및 도 5에 도시된 바와 같이, 본 발명에 따른 배터리 모듈(100)은, 복수 개의 카트리지(110, 120)를 일체로 고정시키는 볼트(150)를 더 포함할 수 있다.Meanwhile, as illustrated in FIGS. 4 and 5, the battery module 100 according to the present invention may further include a bolt 150 that integrally fixes the plurality of cartridges 110 and 120.
이 경우, 카트리지 바디(119, 129)는 볼트(150)가 y축 방향으로 관통하는 볼트공(115, 125)이 형성될 수 있다. 또한, 세퍼레이터(140) 역시 볼트(150)가 관통하는 볼트공(145)이 형성될 수 있다.In this case, the cartridge bodies 119 and 129 may be formed with bolt holes 115 and 125 through which the bolt 150 penetrates in the y-axis direction. In addition, the separator 140 may also be formed with a bolt hole 145 through which the bolt 150 passes.
이로써, 복수 개의 배터리 셀(130)을 내부에 수용하는 복수 개의 카트리지(110, 120)가 1차적으로 상호 스냅핏 결합되고, 2차적으로 볼트(150)에 의해 볼팅 체결됨으로써 견고하게 고정될 수 있다.Accordingly, the plurality of cartridges 110 and 120 accommodating the plurality of battery cells 130 therein are firstly snap-fitted to each other, and secondly bolted by bolts 150 to be securely fixed. .
한편, 본 발명에 따른 배터리 모듈(100)의 하부에는 써멀패드(60)가 배치될 수 있음은 전술하였다.Meanwhile, it has been described above that the thermal pad 60 may be disposed under the battery module 100 according to the present invention.
이하에서는, 셀 리드-버스바 접촉부(A)와 ICB(160) 간의 결합 구성을 살핀 후, ICB(160)와 카트리지(110, 120) 간의 결합 구성을 살펴 배터리 모듈(100)이 전체적으로 조립되는 구성을 구체적으로 설명하도록 한다.Hereinafter, after examining the coupling configuration between the cell lead-bus bar contact portion (A) and the ICB (160), look at the coupling configuration between the ICB (160) and the cartridge (110, 120), the battery module 100 is assembled as a whole Will be described in detail.
도 10에 도시된 바와 같이, ICB(160)는 ICB 바디(161), ICB 버스바(170, 180), ICB 버스바(170, 180)와 전기적으로 연결되는 회로기판(PCB, Printed Circuit Board) 및 커넥터(164)를 포함할 수 있다.10, the ICB 160 is an ICB body 161, an ICB bus bar 170, 180, and a circuit board (PCB, Printed Circuit Board) electrically connected to the ICB bus bar 170, 180. And a connector 164.
ICB 바디(161) 상에 ICB(160)의 각 구성들이 배치되거나 결합될 수 있다.Each component of the ICB 160 may be disposed or combined on the ICB body 161.
ICB 버스바(170, 180)는, ICB 바디(161)에 고정되는 고정부(171, 181)와, 고정부(171, 181)로부터 돌출되고, 셀 리드-버스바 접촉부(A)가 삽입되는 삽입부(172, 182)를 포함할 수 있다.The ICB bus bars 170 and 180 are fixed to the ICB body 161, 171 and 181, protruding from the fixed parts 171 and 181, and the cell lead-bus bar contact portion A is inserted. It may include the insertion portion (172, 182).
도 12 및 도 14에 도시된 바와 같이, ICB(160)는, ICB 바디(161) 중 고정부(171, 181)를 향하는 면에 수직하게 돌출되는 보스부(165)를 포함할 수 있다. 보스부(165)는, ICB 바디(161)로부터 -x축 방향으로 돌출될 수 있다.12 and 14, the ICB 160 may include a boss portion 165 protruding perpendicular to a surface facing the fixing portions 171 and 181 of the ICB body 161. The boss portion 165 may protrude from the ICB body 161 in the -x axis direction.
이 경우, 고정부(171, 181)는 보스부(165)가 관통되는 관통홀(175, 185)이 형성될 수 있다. 도 10 등에서는 고정부(171, 181) 각각에 3 개의 관통홀(175, 185)이 형성되는 것으로 도시되어 있으나, 이는 예시적일 뿐이다.In this case, the fixing parts 171 and 181 may be formed with through holes 175 and 185 through which the boss part 165 penetrates. In FIG. 10 and the like, three through holes 175 and 185 are formed in each of the fixing parts 171 and 181, but this is only an example.
보스부(165)는 관통홀(175, 185)을 관통한 다음, 고정부(171, 181)와 열융착되어 고정부(171, 181)와 결합될 수 있고, 이후 다시 열을 가하여 분리될 수 있다.The boss portion 165 may pass through the through-holes 175 and 185 and be heat-sealed with the fixing portions 171 and 181 to be combined with the fixing portions 171 and 181, and then separated by applying heat again. have.
또는, 도 14에 도시된 바와 같이, 보스부(165)는, 단부로 갈수록 간격이 넓어지는 복수 개의 갈래로 형성되되, 외력이 가해지면 상기 간격이 좁아지도록 형성되어, 고정부(171)와 스냅핏 결합될 수 있다.Alternatively, as illustrated in FIG. 14, the boss portion 165 is formed of a plurality of forks that widen the gap toward the end, and is formed to narrow the gap when an external force is applied, and the fixing portion 171 and the snap Fit can be combined.
삽입부(172, 182)는, 고정부(171, 181)로부터 -x축 방향으로 돌출될 수 있다.The insertion portions 172 and 182 may protrude from the fixing portions 171 and 181 in the -x axis direction.
이하에서는, 간략한 설명을 위해 ICB 버스바(170, 180) 중 제1 ICB 버스바(170)를 기준으로 설명하도록 한다.Hereinafter, for the sake of simplicity, the first ICB bus bar 170 among the ICB bus bars 170 and 180 will be described.
또한, 도 13에 도시된 바와 같이, 제1 ICB 버스바(170)는 2 개의 삽입부(172a, 172b)를 포함하나, 간략한 설명을 위해 +y축 방향에 위치한 삽입부(172a)를 기준으로 설명하도록 한다.In addition, as shown in FIG. 13, the first ICB bus bar 170 includes two inserting portions 172a and 172b, but based on the inserting portion 172a located in the + y axis direction for a brief description. Explain.
삽입부(172a)는, 셀 리드-버스바 접촉부(A)를 사이에 두고 서로 이격된 제1 가압체(1721), 제2 가압체(1722) 및 상기 제1 및 제2 가압체(1721, 1722) 각각의 상단을 연결하는 연결체(1723)를 포함할 수 있다.The insertion portion 172a includes a cell press-bus bar contact portion A, a first pressing body 1721, a second pressing body 1722 spaced apart from each other, and the first and second pressing bodies 1721, 1722) may include a connector 1723 connecting each upper end.
연결체(1723)는, 셀 리드-버스바 접촉부(A)를 외부로부터의 충격과 오염으로부터 보호하는 기능을 발휘할 수 있다.The connection body 1723 can exhibit a function of protecting the cell lead-busbar contact portion A from impact and contamination from the outside.
도 11 및 도 13d에 도시된 바와 같이, 제1 및 제2 가압체(1721, 1722)는 z축 방향으로 길게 연장 형성될 수 있다.11 and 13D, the first and second pressing bodies 1721 and 1722 may be formed to extend in the z-axis direction.
제1 및 제2 가압체(1721, 1722)는, 셀 리드-버스바 접촉부(A)를 구성하는 카트리지 버스바(111, 121)와 접촉될 수 있다. 다시 말해, 제1 및 제2 가압체(1721, 1722)는, 셀 리드-버스바 접촉부(A)를 구성하는 카트리지 버스바(111, 121)와 y축 방향으로 접촉될 수 있다.The first and second pressing bodies 1721 and 1722 may contact the cartridge busbars 111 and 121 constituting the cell lead-busbar contact portion A. In other words, the first and second pressing bodies 1721 and 1722 may be in contact with the cartridge busbars 111 and 121 constituting the cell lead-busbar contact portion A in the y-axis direction.
이로써, 셀 리드(133)는 카트리지 버스바(111, 121) 및 제1 ICB 버스바(170)와 순차적으로 전기적으로 연결될 수 있다.Accordingly, the cell leads 133 may be sequentially electrically connected to the cartridge busbars 111 and 121 and the first ICB busbar 170.
삽입부(172a)에 셀 리드-버스바 접촉부(A)가 삽입되지 않은 경우에, 제1 및 제2 가압체(1721, 1722) 간의 간격은, 셀 리드-버스바 접촉부(A)의 폭보다 좁을 수 있다.When the cell lead-busbar contact portion A is not inserted in the insertion portion 172a, the interval between the first and second pressing bodies 1721, 1722 is greater than the width of the cell lead-busbar contact portion A It can be narrow.
이로써, 삽입부(172a)에 셀 리드-버스바 접촉부(A)가 삽입되면, 제1 및 제2 가압체(1721, 1722)가 카트리지 버스바(111, 121)를 크게 가압함으로써, 셀 리드-버스바 접촉부(A)의 전기적 연결이 향상될 수 있다.Thus, when the cell lead-bus bar contact portion A is inserted into the insertion portion 172a, the first and second pressing bodies 1721 and 1722 press the cartridge bus bars 111 and 121 largely, thereby leading to the cell lead- The electrical connection of the busbar contacts A can be improved.
이와 관련하여, 상기한 셀 리드-버스바 접촉부(A)의 전기적 연결의 향상은, 아래에서 설명될 본 발명의 제2 또는 제3 실시예에 따른 배터리 모듈에서도 달성할 수 있다.In this regard, the improvement of the electrical connection of the cell lead-busbar contact A described above can be achieved in the battery module according to the second or third embodiment of the present invention, which will be described below.
즉, 도 16에 도시된 바와 같이, 본 발명의 제2 실시예에 따른 ICB(160)는, 일단이 제1 및 제2 가압체(1721, 1722)의 외측면 중 어느 하나에 연결되고, 타단이 고정단인 로드(169)를 더 포함할 수 있다. 로드(169)는 원기둥 형상일 수 있으나, 형상이나 재질에 특별한 한정이 있는 것은 아니다.That is, as shown in Figure 16, the ICB 160 according to the second embodiment of the present invention, one end is connected to any one of the outer surface of the first and second pressing bodies (1721, 1722), the other end A rod 169 that is a fixed end may be further included. The rod 169 may have a cylindrical shape, but is not particularly limited in shape or material.
로드(169)는 y축 방향을 따라 배치될 수 있고, 양단이 모두 고정단이어서, 제1 및 제2 가압체(1721, 1722)가 카트리지 버스바(111, 121)를 가압하는 것을 보조하여, 셀 리드-버스바 접촉부(A)의 전기적 연결이 향상될 수 있다.The rod 169 may be disposed along the y-axis direction, and both ends thereof are fixed ends, thereby assisting the first and second pressing bodies 1721 and 1722 to press the cartridge busbars 111 and 121, The electrical connection of the cell lead-busbar contact A can be improved.
또한, 도 17에 도시된 바와 같이, 본 발명의 제3 실시예에 따른 삽입부(172a)는, 셀 리드-버스바 접촉부(A)의 전기적 연결이 향상되도록 제1 및 제2 가압체(1721, 1722)가 서로 마주보는 면 중 적어도 일면에, 보강 부재(176, 177, 179)를 포함할 수 있다.In addition, as shown in Figure 17, the insertion portion 172a according to the third embodiment of the present invention, the first and second pressing bodies 1721 to improve the electrical connection of the cell lead-bus bar contact (A) , 1722) may include reinforcing members (176, 177, 179) on at least one of the surfaces facing each other.
보강 부재(176, 177, 179)는, 제1 및 제2 가압체(1721, 1722)의 재질과 다른 재질일 수 있다.The reinforcing members 176, 177, and 179 may be made of materials different from the materials of the first and second pressing bodies 1721 and 1722.
도 17(a)에 도시된 바와 같이, 보강 부재는, 제1 및 제2 가압체(1721, 1722)로부터 일정 높이로 돌출되는 돌기(176)일 수 있다. 돌기(176)는 복수 개가 교차로 배치되어, 셀 리드-버스바 접촉부(A)의 전기적 연결을 향상시킬 수 있다.As shown in FIG. 17 (a), the reinforcing member may be a protrusion 176 protruding from the first and second pressing bodies 1721, 1722 to a predetermined height. A plurality of protrusions 176 may be arranged at intersections to improve the electrical connection of the cell lead-bus bar contacts A.
도 17(b)에 도시된 바와 같이, 보강 부재는, 제1 및 제2 가압체(1721, 1722)의 z축 방향으로 길게 연장 형성되는 돌기선(177)일 수 있다. 돌기선(177)은 서로 이격 배치되어, 셀 리드-버스바 접촉부(A)의 전기적 연결을 향상시킬 수 있다.As shown in FIG. 17 (b), the reinforcing member may be a protruding line 177 formed to extend in the z-axis direction of the first and second pressing bodies 1721 and 1722. The protruding lines 177 are spaced apart from each other to improve the electrical connection of the cell lead-bus bar contact portion (A).
상기한, 돌기(176)와 돌기선(177)은 모두 돌출 부재의 예로서 이해될 수 있다.As described above, both the protrusion 176 and the protrusion line 177 can be understood as examples of the protruding member.
도 17(c)에 도시된 바와 같이, 보강 부재는, 제1 및 제2 가압체(1721, 1722)에 부착된 전기 전도체(179)일 수 있다. 전기 전도체(179)는 제1 및 제2 가압체(1721, 1722)보다 전기 전도성이 높은 물질로 형성되어, 셀 리드-버스바 접촉부(A)의 전기적 연결을 향상시킬 수 있다.As shown in FIG. 17 (c), the reinforcing member may be an electrical conductor 179 attached to the first and second pressing bodies 1721 and 1722. The electrical conductor 179 is formed of a material having a higher electrical conductivity than the first and second pressing bodies 1721 and 1722, thereby improving the electrical connection of the cell lead-bus bar contact portion A.
도 13에 도시된 바와 같이, 제1 및 제2 가압체(1721, 1722) 각각은, 하단에 제1 및 제2 진입체(1724, 1725)를 포함할 수 있다.13, each of the first and second pressing bodies 1721 and 1722 may include first and second entry bodies 1724 and 1725 at the bottom.
제1 및 제2 진입체(1724, 1725) 간의 간격은, 제1 및 제2 가압체(1721, 1722) 각각으로부터 멀어질수록 넓어질 수 있다.The distance between the first and second entry bodies 1724 and 1725 may increase as the distance from the first and second pressing bodies 1721 and 1722 respectively.
이로써, 삽입 진입로가 넓어져, 삽입부(172a)에 셀 리드-버스바 접촉부(A)를 삽입하는 것이 용이해질 수 있다.As a result, the insertion path is widened, so that it is easy to insert the cell lead-bus bar contact portion A into the insertion portion 172a.
ICB 버스바(170, 180)는 고정부(171, 181)로부터 +z축 방향으로 돌출되는 접속 단자(173, 183)을 포함할 수 있다.The ICB bus bars 170 and 180 may include connection terminals 173 and 183 protruding from the fixing parts 171 and 181 in the + z axis direction.
접속 단자(173, 183)는 회로기판(163)과 전기적으로 연결될 수 있고, 회로기판(163)에는 외부로 전력을 전달하는 커넥터(164)가 설치될 수 있다.The connection terminals 173 and 183 may be electrically connected to the circuit board 163, and a connector 164 for transmitting power to the outside may be installed on the circuit board 163.
이로써, 배터리 셀(130)에서 생성된 전기 에너지는 셀 리드(133), 카트리지 버스바(111, 121), ICB 버스바(170, 180), 회로기판(163) 및 커넥터(164)를 순차적으로 통과하여 외부로 전달될 수 있다.Thus, the electrical energy generated by the battery cell 130 sequentially leads to the cell leads 133, the cartridge busbars 111 and 121, the ICB busbars 170 and 180, the circuit board 163 and the connector 164. It can be passed through and transmitted to the outside.
ICB 버스바(170, 180)는 제1 ICB 버스바(170)와, 제2 ICB 버스바(180)를 포함할 수 있다.The ICB bus bars 170 and 180 may include a first ICB bus bar 170 and a second ICB bus bar 180.
ICB 버스바(170, 180) 중 ICB(160)의 양 끝단에 위치한 것이 제2 ICB 버스바(180)이고, 나머지가 제1 ICB 버스바(170)일 수 있다.Among the ICB bus bars 170 and 180, the second ICB bus bar 180 is located at both ends of the ICB 160, and the rest may be the first ICB bus bar 170.
도 10 등에서는, 제1 ICB 버스바(170)에 2 개의 삽입부(172a, 172b)가 구비되고, 제2 ICB 버스바(180)에 1 개의 삽입부(182)가 구비되는 것으로 도시되어 있으나, 이와 달리 구성하는 것도 가능함은 물론이다.In FIG. 10 and the like, it is illustrated that the first ICB bus bar 170 is provided with two inserts 172a and 172b, and the second ICB bus bar 180 is provided with one insert 182. Of course, it is also possible to configure differently.
하나의 ICB(160)에 복수 개의 ICB 버스바(170, 180)가 구비됨으로써, 복수 개의 셀 리드-버스바 접촉부(A)를 동시에 전기적으로 연결할 수 있다는 것도 본 발명의 특징 중 하나이다.It is also one of the features of the present invention that a plurality of ICB busbars 170 and 180 are provided in one ICB 160 so that a plurality of cell lead-busbar contacts A can be electrically connected simultaneously.
도 12에 도시된 바와 같이, ICB(160)는, 상단부 및 하단부에 스냅돌기(166, 167)를 포함할 수 있다.12, the ICB 160 may include snap projections 166 and 167 at the upper and lower ends.
이 경우, 도 9, 도 10 및 도 15에 도시된 바와 같이, 카트리지(110, 120)는, 스냅돌기(166, 167)와 맞물려 스냅핏 결합되는 스냅홀(116, 117, 126, 127)을 포함할 수 있다.In this case, as shown in FIGS. 9, 10 and 15, the cartridges 110 and 120 engage the snap holes 116, 117, 126, and 127 engaged with the snap projections 166, 167 and snap-fitted. It can contain.
상기 스냅핏 결합의 간략한 설명을 위해, 도 15를 참고하여, ICB(160)가 제2 카트리지(120)에 결합되는 구성을 설명하도록 한다.For a brief description of the snap-fit engagement, referring to FIG. 15, the configuration in which the ICB 160 is coupled to the second cartridge 120 will be described.
ICB(160)는 제2 카트리지(120)와 +x축 방향으로 소정 간격 이격된 채로, 셀 리드-버스바 접촉부(A)가 점차 삽입되며 -z축 방향으로 이동한다.The ICB 160 is spaced apart from the second cartridge 120 by a predetermined distance in the + x axis direction, and the cell lead-busbar contact portion A is gradually inserted and moves in the -z axis direction.
이후에, ICB(160)의 상단부에 구비된 스냅돌기(166)가 -x축 방향으로 이동하며 제2 카트리지(120)의 상단부에 구비된 스냅홀(126)에 삽입되어 스냅핏 결합되고, 이때 ICB(160)의 하단부에 구비된 스냅돌기(167)도 -x축 방향으로 이동하며 제2 카트리지(120)의 하단부에 구비된 스냅홀(127)에 삽입되어 스냅핏 결합될 수 있다.Subsequently, the snap projection 166 provided on the upper portion of the ICB 160 moves in the -x axis direction and is inserted into the snap hole 126 provided on the upper portion of the second cartridge 120 to be snap-fit, The snap protrusion 167 provided at the lower end of the ICB 160 also moves in the -x axis direction and is inserted into the snap hole 127 provided at the lower end of the second cartridge 120 to be snap-fit.
이로써, 셀 리드-버스바 접촉부(A)가 삽입된 ICB(160)는 제2 카트리지(120)에 견고하게 고정될 수 있다.As a result, the ICB 160 into which the cell lead-bus bar contact portion A is inserted may be firmly fixed to the second cartridge 120.
한편, 도 12에 도시된 바와 같이, ICB(160)의 상단부에 구비된 스냅돌기(166)는 ICB(160)로부터 -x축 방향으로 돌출되고, ICB(160)의 하단부에 구비된 스냅돌기(167)는 ICB(160)로부터 y축 방향 중 ICB(160)의 내측을 향하는 방향으로 돌출될 수 있다. Meanwhile, as illustrated in FIG. 12, the snap projection 166 provided at the upper end of the ICB 160 protrudes in the -x axis direction from the ICB 160 and the snap projection provided at the lower end of the ICB 160 ( 167) may protrude in the direction from the ICB 160 toward the inside of the ICB 160 among the y-axis directions.
즉, ICB(160) 상단부에서의 스냅핏 결합 방향은, ICB(160) 하단부에서의 스냅핏 결합 방향과 직각으로 교차될 수 있다. 이로써, ICB(160)가 카트리지(110, 120)에 더욱 견고하게 고정될 수 있다.That is, the snap-fit engagement direction at the upper end of the ICB 160 may intersect at a right angle to the snap-fit engagement direction at the lower end of the ICB 160. Thereby, the ICB 160 can be more firmly fixed to the cartridges 110 and 120.
본 발명의 범위는 첨부된 청구항의 합리적 해석에 의해 결정되어야 하고, 본 발명의 등가적 범위 내에서의 모든 변경은 본 발명의 범위에 포함된다.The scope of the invention should be determined by rational interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.
[부호의 설명][Description of codes]
1: 차량 10: 배터리 팩1: Vehicle 10: Battery pack
100: 배터리 모듈 110: 제1 카트리지100: battery module 110: first cartridge
111: 제1 카트리지 버스바 121: 제2 카트리지 버스바111: first cartridge busbar 121: second cartridge busbar
130: 배터리 셀 131: 셀 바디130: battery cell 131: cell body
133: 셀 리드 140: 세퍼레이터133: cell lead 140: separator
160: ICB 161: ICB 바디160: ICB 161: ICB body
163: PCB 165: 보스부163: PCB 165: boss section
170, 180: ICB 버스바 171, 181: 고정부170, 180: ICB bus bar 171, 181: fixing part
172, 182: 삽입부 172, 182: insert

Claims (15)

  1. 각각이 셀 바디와, 상기 셀 바디로부터 돌출되는 셀 리드를 포함하고, 상호 적층되는 복수 개의 배터리 셀;A plurality of battery cells, each of which comprises a cell body, a cell lead protruding from the cell body, and stacked with each other;
    각각이 상기 셀 바디가 내부에 배치되는 카트리지 바디와, 상기 카트리지 바디로부터 돌출되어 상기 셀 리드와 접촉되는 카트리지 버스바를 포함하고, 상호 적층되는 복수 개의 카트리지; 및A plurality of cartridges, each of which includes a cartridge body in which the cell body is disposed, and a cartridge bus bar protruding from the cartridge body and contacting the cell lead; And
    상기 셀 리드와 카트리지 버스바가 밀착되도록 상기 카트리지 버스바를 가압하는 복수 개의 ICB 버스바와, 상기 ICB 버스바와 전기적으로 연결되는 회로기판을 포함하는 ICB(Interconnect Circuit Board)를 포함하고,And a plurality of ICB busbars which pressurize the cartridge busbar so that the cell leads and cartridge busbars are in close contact, and an ICB (Interconnect Circuit Board) including a circuit board electrically connected to the ICB busbars,
    상기 셀 리드의 일측면과 상기 일측면에 반대되는 타측면에는,On one side of the cell lead and the other side opposite to the one side,
    상기 카트리지 버스바가 각각 접촉되어 셀 리드-버스바 접촉부를 형성하는 배터리 모듈.A battery module in which the cartridge busbars are respectively contacted to form a cell lead-busbar contact.
  2. 제1항에 있어서,According to claim 1,
    상기 ICB 버스바는,The ICB bus bar,
    상기 ICB에 고정되는 고정부; 및A fixing part fixed to the ICB; And
    상기 고정부로부터 돌출되고, 상기 셀 리드-버스바 접촉부가 삽입되는 삽입부를 포함하는 배터리 모듈.A battery module including an insertion portion protruding from the fixing portion and into which the cell lead-bus bar contact portion is inserted.
  3. 제2항에 있어서,According to claim 2,
    상기 삽입부는,The insertion portion,
    상기 셀 리드-버스바 접촉부를 사이에 두고 서로 이격된 제1 및 제2 가압체;First and second pressing bodies spaced apart from each other with the cell lead-bus bar contact portion interposed therebetween;
    상기 제1 및 제2 가압체 각각의 상단을 연결하는 연결체를 포함하는 배터리 모듈.A battery module including a connecting body connecting upper ends of the first and second pressing bodies.
  4. 제3항에 있어서,According to claim 3,
    상기 삽입부에 상기 셀 리드-버스바 접촉부가 삽입되지 않은 경우에,When the cell lead-bus bar contact is not inserted in the insertion portion,
    상기 제1 및 제2 가압체 간의 간격은,The interval between the first and second pressing bodies,
    상기 셀 리드-버스바 접촉부의 폭보다 좁은 배터리 모듈.The battery module narrower than the width of the cell lead-bus bar contact.
  5. 제4항에 있어서,According to claim 4,
    상기 제1 및 제2 가압체 각각은,Each of the first and second pressing bodies,
    하단에 제1 및 제2 진입체를 포함하고,The first and second entry body at the bottom,
    상기 제1 및 제2 진입체 간의 간격은,The distance between the first and second entry bodies,
    상기 제1 및 제2 가압체 각각으로부터 멀어질수록 넓어지는 배터리 모듈.The battery module widens as it moves away from each of the first and second pressing bodies.
  6. 제3항에 있어서,According to claim 3,
    상기 ICB는,The ICB,
    일단이 상기 제1 및 제2 가압체의 외측면 중 어느 하나에 연결되고, 타단이 고정단인 로드를 더 포함하는 배터리 모듈.One end is connected to any one of the outer surface of the first and second pressing bodies, the other end of the battery module further comprises a rod that is a fixed end.
  7. 제3항에 있어서,According to claim 3,
    상기 삽입부는,The insertion portion,
    상기 셀 리드-버스바 접촉부의 전기적 연결이 향상되도록 상기 제1 및 제2 가압체가 서로 마주보는 면 중 적어도 일면에, 상기 제1 및 제2 가압체의 재질과 다른 재질의 보강 부재를 더 포함하는 배터리 모듈.The cell lead-bus bar further comprises a reinforcing member of a material different from the material of the first and second pressing bodies on at least one surface of the first and second pressing bodies facing each other so as to improve the electrical connection of the contact portion. Battery module.
  8. 제7항에 있어서,The method of claim 7,
    상기 보강 부재는,The reinforcing member,
    전기 전도체 및 일정 높이로 돌출되는 돌출 부재 중 적어도 하나인 배터리 모듈.A battery module that is at least one of an electrical conductor and a protruding member protruding to a certain height.
  9. 제2항에 있어서,According to claim 2,
    상기 ICB는,The ICB,
    상기 고정부를 향하는 면에 수직하게 돌출되는 보스부를 포함하고,And a boss portion projecting perpendicular to a surface facing the fixing portion,
    상기 고정부는,The fixing part,
    상기 보스부가 관통되는 관통홀이 형성되는 배터리 모듈.A battery module in which a through hole through which the boss portion passes is formed.
  10. 제9항에 있어서,The method of claim 9,
    상기 보스부는,The boss portion,
    단부로 갈수록 간격이 넓어지는 복수 개의 갈래로 형성되되, 외력이 가해지면 상기 간격이 좁아지도록 형성되어, 상기 고정부와 스냅핏 결합되는 배터리 모듈.The battery module is formed of a plurality of forks that widen the gap toward the end, and is formed to narrow the gap when an external force is applied, and is snap-fitted with the fixing part.
  11. 제1항에 있어서,According to claim 1,
    상기 ICB는,The ICB,
    상단부 및 하단부에 스냅돌기를 포함하고,Includes snap projections at the top and bottom,
    상기 카트리지는,The cartridge,
    상기 스냅돌기와 맞물려 스냅핏 결합되는 스냅홀을 포함하는 배터리 모듈.A battery module including a snap hole engaged with the snap protrusion and engaged with a snap fit.
  12. 제11항에 있어서,The method of claim 11,
    상기 ICB 상단부에서의 스냅핏 결합 방향은,The snap-fit coupling direction at the upper end of the ICB,
    상기 ICB 하단부에서의 스냅핏 결합 방향과 직각으로 교차되는 배터리 모듈.Battery module crossing at right angles to the snap-fit engagement direction at the bottom of the ICB.
  13. 제1항에 있어서,According to claim 1,
    상기 카트리지 바디는,The cartridge body,
    스냅돌편 및 스냅홈 중 적어도 하나를 포함하고,At least one of a snap stone piece and a snap groove,
    상기 복수 개의 카트리지는,The plurality of cartridges,
    상기 스냅돌편 및 스냅홈에 의한 스냅핏 결합으로 상호 결합되는 배터리 모듈.A battery module that is mutually coupled by snap-fit engagement by the snap protrusion and the snap groove.
  14. 제13항에 있어서,The method of claim 13,
    상기 복수 개의 카트리지를 일체로 고정시키는 볼트를 더 포함하고,Further comprising a bolt for fixing the plurality of cartridges integrally,
    상기 카트리지 바디는,The cartridge body,
    상기 볼트가 관통하는 볼트공이 형성되는 배터리 모듈.A battery module in which a bolt hole through which the bolt passes is formed.
  15. 제1항에 있어서,According to claim 1,
    상기 카트리지 바디와 카트리지 버스바는,The cartridge body and the cartridge bus bar,
    일체로 인서트 사출되고,Integral insert injection,
    상기 카트리지 버스바 중 상기 카트리지 바디에 함몰된 부분은,The portion of the cartridge bus bar that is recessed in the cartridge body,
    적어도 한번 절곡되어 형성되는 배터리 모듈.A battery module formed by bending at least once.
PCT/KR2018/014028 2018-11-15 2018-11-15 Battery module WO2020101073A1 (en)

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Publication number Priority date Publication date Assignee Title
TWI754413B (en) * 2020-07-03 2022-02-01 美商莫仕有限公司 battery connection module

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JP2013187046A (en) * 2012-03-08 2013-09-19 Nissan Motor Co Ltd Battery pack
KR20140128477A (en) * 2013-04-25 2014-11-06 에스케이컨티넨탈이모션코리아 주식회사 Housing for Pouch cell and Pouch cell unit having the housing
US20150171399A1 (en) * 2013-12-18 2015-06-18 Hyundai Motor Company High voltage battery for vehicle
KR20170021631A (en) * 2015-08-18 2017-02-28 주식회사 엘지화학 Cell Lead Connecting Apparatus and Battery module including the same
KR20170077467A (en) * 2015-12-28 2017-07-06 한국단자공업 주식회사 Series connection apparatus of battery module

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JP2013187046A (en) * 2012-03-08 2013-09-19 Nissan Motor Co Ltd Battery pack
KR20140128477A (en) * 2013-04-25 2014-11-06 에스케이컨티넨탈이모션코리아 주식회사 Housing for Pouch cell and Pouch cell unit having the housing
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KR20170021631A (en) * 2015-08-18 2017-02-28 주식회사 엘지화학 Cell Lead Connecting Apparatus and Battery module including the same
KR20170077467A (en) * 2015-12-28 2017-07-06 한국단자공업 주식회사 Series connection apparatus of battery module

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TWI754413B (en) * 2020-07-03 2022-02-01 美商莫仕有限公司 battery connection module

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