WO2015046725A1 - 전기 절연성 부재를 포함하는 전지팩 - Google Patents
전기 절연성 부재를 포함하는 전지팩 Download PDFInfo
- Publication number
- WO2015046725A1 WO2015046725A1 PCT/KR2014/006415 KR2014006415W WO2015046725A1 WO 2015046725 A1 WO2015046725 A1 WO 2015046725A1 KR 2014006415 W KR2014006415 W KR 2014006415W WO 2015046725 A1 WO2015046725 A1 WO 2015046725A1
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- Prior art keywords
- battery
- pack
- battery pack
- frame
- pcm
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims description 36
- 238000003466 welding Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 9
- 229910052744 lithium Inorganic materials 0.000 claims description 9
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- 239000011255 nonaqueous electrolyte Substances 0.000 description 5
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0463—Cells or batteries with horizontal or inclined electrodes
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- 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
- H01M50/204—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
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
- H01M50/557—Plate-shaped terminals
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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
- H01M50/572—Means for preventing undesired use or discharge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
-
- 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
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a battery pack including an electrically insulating member, and more particularly, a pack frame including two or more plate-shaped battery cells arranged in a plane, two or more battery cell housings, and controlling the operation of the battery pack.
- a battery pack comprising a protection circuit module (PCM), an intermediate mold mounted on a sealing surplus, an electrically insulating member, and a label.
- PCM protection circuit module
- Secondary batteries are classified into cylindrical batteries, square batteries, and pouch-type batteries according to their appearance. Due to the recent trend toward miniaturization of mobile devices, the demand for thinner rectangular batteries and pouch-type batteries is increasing. Doing. 1 and 2 schematically show an exploded perspective view and a combined perspective view of the pouch-type battery.
- the pouch type battery 10 includes a pouch type case 20 in which an internal space 21 having a predetermined size is formed; A cover 30 hingedly connected to the pouch-type case 20; An electrode assembly 40 including the positive plate 41, the negative plate 42, and the separator 43, and seated on the housing 21 of the pouch-type case 20; Electrode tabs 41a and 42a extending from the ends of the positive electrode plate 41 and the negative electrode plate 41 of the electrode assembly 40; And electrode terminals 50 and 51 connected to the electrode tabs 41a and 42a.
- the upper edge portion of the accommodating portion 21 of the pouch-shaped case 20 has a side extension portion 22 having a predetermined width for heat fusion, and the electrode terminals 50 and 51 connected to the electrode tabs 41a and 42a are formed.
- a short is formed between the electrode terminals 50 and 51.
- the terminal tape 52 of an insulating material is coated so as not to be generated.
- the electrode assembly 40 consisting of a plurality of positive electrode plates 41, negative electrode plates 42, and separators 43 is placed in the accommodating portion 21 of the pouch-type case 20, and then a predetermined amount of electrolyte is contained in the inner space thereof.
- the electrode tabs 41a and 42a of the electrode assembly 40 are connected to the corresponding electrode terminals 50 and 51 having a central portion coated with the terminal tape 52, and the electrode terminals 50 and 51 and the terminal tape. A part of 52 protrudes out of the pouch-shaped case 20 and the cover 30.
- the cover 3 is brought into close contact with the pouch-type case 20, and the side extension part 22 of the pouch-type case 20 and the side part 31 of the cover 30 are prevented from leaking a heat welder ( Seal (not shown).
- FIG. 3 The shape of a typical battery pack in which such a pouch-type battery is incorporated is shown in FIG. 3, and a state diagram of separation before assembly thereof is schematically illustrated in FIG. 4.
- the battery pack 60 may accommodate a rectangular battery 10 and a battery 10 in which the electrode assembly of the positive electrode, the negative electrode, and the separator and the electrolyte are sealed.
- a case body 70 having an inner space and an upper cover 80 coupled to the case body 70 in which the battery 10 is housed and sealing the battery 10 are formed.
- a double-sided tape 90 is attached between the case body 70 and the battery 10 and between the top cover 80 and the battery 10.
- the battery pack 60 of this structure is assembled by mutually coupling the case body 70 and the upper cover 80, each of which is made of a plastic material such as PC, ABS, or the like by ultrasonic welding.
- the ultrasonic welding method is, for example, a method in which friction heat is generated by vibration using a high frequency of 20,000 Hz to melt-bond two surfaces to be bonded.
- the thickness of the case body 70 and the top cover 80 has been thinned to 0.3 to 0.35 mm, respectively, and therefore, difficult to mold and injection molding.
- the pouch-type battery 10 having the structure as shown in FIG. 1 is provided with an appropriate strength against external impact even with a thin case due to the structural characteristics of the can. ) Is limited in the application of a thin case because the structural strength of the external impact is small.
- the battery 10 may be moved up and down in the inner space of the case body 70 and the upper cover 80 to cause a short or a short circuit.
- the secondary battery may be used in the form of a single battery, or in the form of a battery pack electrically connected to a plurality of unit cells, depending on the type of external device that is used.
- a small device such as a mobile phone can operate for a predetermined time with one battery output and capacity
- a medium or large device such as a notebook computer, tablet computer, small PC, electric vehicle, hybrid electric vehicle, etc.
- a battery pack containing a plurality of batteries due to the capacity problem is required.
- lithium secondary batteries are frequently used due to their high output characteristics and large capacity.
- a lithium secondary battery Since various lithium combustible materials are built in the lithium secondary battery, there is a risk of overheating, explosion, etc. due to overcharging, overcurrent, and other physical external shocks. Therefore, a lithium secondary battery has a PTC (Positive Temperature Coefficient) element and a protection circuit module (PCM) connected to the battery cell as a safety device that can effectively control abnormal conditions such as overcharge and overcurrent. It is mounted.
- PTC Physical Temperature Coefficient
- one or two or four battery cells are used for small mobile devices, whereas a medium to large battery module electrically connecting a plurality of battery cells is required due to the necessity of high output capacity for medium and large devices such as automobiles. Used. Since the size and weight of the battery module are directly related to the accommodation space and the output of the medium and large devices, manufacturers are trying to manufacture a battery module that is as small and lightweight as possible.
- a plurality of unit cells are embedded in a cartridge in series or parallel connection, and a battery pack is manufactured by electrically connecting a plurality of such cartridges.
- FIG. 5 schematically shows a series connection of unit cells in a high power / large capacity battery pack of the prior art.
- the unit cell 110 is sealed by a case in which a positive electrode, a negative electrode, a separator, and an electrolyte are embedded therein, and a positive electrode tab 120 and a negative electrode tab 130 protrude from upper and lower portions thereof, respectively. It is.
- the positive electrode tab 120 is positioned upward in the first unit cell 110
- the adjacent second unit cell 111 is disposed such that the positive electrode tab 121 is positioned downward.
- These unit cells 110 and 111 are electrically connected to each other by the electrode lead 140 while the opposite electrodes are adjacent to each other.
- the third unit cell 112 is also connected in series with the second unit cell 111 in a state arranged in such a manner. Adjacent to the first battery group consisting of a plurality of unit cells connected in a series manner as described above, a second battery group consisting of a plurality of unit cells not shown in FIG. Adjacent to the battery group is connected in parallel.
- the positive electrode tab 120 of the first unit cell 110 of each cell group is connected to the positive external terminal 150 and the negative electrode tab of the last unit cell 115 ( 133 is embedded in the housing 170 in a state connected to the cathode external terminal 160.
- the electrode tabs 120 and 130 are formed in the long axis direction of the unit cell 110 of FIG. 1, in some cases, a structure in which the electrode tabs face each other in the short axis direction is also developed.
- the same plurality of unit cells 110, 111, 112, 113, 114, and 115 have the same size or capacity. Since the battery pack is configured to have a battery pack, in order to make the battery pack light and thin in consideration of the design of the device to which the battery pack is applied, there is a problem of reducing the capacity of the battery pack or changing the design of the device to a larger size. In addition, there is a problem that it is difficult to manufacture a battery pack that satisfies the desired conditions due to the complicated electrical connection method in the design change process.
- the present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
- An object of the present invention by accommodating a plurality of battery cells in a specific manner to be stored in a battery pack, by connecting a plurality of unit cells to maintain the capacity of the battery pack while being applicable to the shape of the device to which the battery pack is applied Is to provide a pack.
- Another object of the present invention by fixing the battery cell and the battery pack frame with a specific material, to provide a battery pack having a good strength against external impact and excellent safety against short to power failure, even when using a thin case.
- Two or more plate-shaped battery cells having a negative electrode terminal and a positive electrode terminal formed on one side including a sealing surplus and arranged in a plane such that the electrode terminals are aligned in one direction;
- a pack frame including two or more battery cell accommodating parts surrounding the outer circumferential surface of the battery cell with the top and bottom surfaces of the planarly arranged plate-shaped battery cells open;
- a protection circuit module electrically connected to electrode terminals aligned in one direction of the battery cells and controlling operation of the battery pack;
- a middle mold accommodating the protection circuit module and mounted on the sealing surplus
- the battery pack of the present invention can be fixed by mounting the battery in the pack frame without resorting to the ultrasonic welding method, the size or structure of the case is not particularly limited, and the movement of the battery in the inner space of the case is suppressed, so that the external shock Short-circuit by a short circuit can be prevented.
- the battery pack according to the present invention by forming the structure of the battery pack by combining the battery cells to correspond to the design shape of the device to which the battery pack is applied, providing a high capacity while being flexibly adapted to fit the various shapes of the device Can be.
- the pack frame is not particularly limited as long as the pack frame has an inner space capable of accommodating the battery and surrounds the side of the battery.
- the pack frame may be a frame member that surrounds only the side of the battery.
- the material of the pack frame is not particularly limited as long as it is a material capable of protecting the battery therein.
- a plastic material such as Polycarbonate (PC), Polyacrylonitrile-butadiene-styrene (ABS), or stainless steel ( Metal material such as SUS).
- the plate-shaped battery cell may be, for example, a rectangular secondary battery or a pouch secondary battery.
- the rectangular secondary battery may have a structure in which an electrode assembly is sealed in a rectangular metal case
- the pouch type secondary battery may specifically have a structure in which an electrode assembly is sealed in a laminate sheet including a resin layer and a metal layer.
- the secondary battery may preferably be a lithium secondary battery having high energy density, discharge voltage, and output stability. Other components of the lithium secondary battery will be described in detail below.
- a lithium secondary battery is composed of a positive electrode, a negative electrode, a separator, a lithium salt-containing nonaqueous electrolyte, and the like.
- the positive electrode is produced by, for example, applying a mixture of a positive electrode active material, a conductive material, and a binder onto a positive electrode current collector, followed by drying, and further, a filler may be further added as necessary.
- the negative electrode is also manufactured by applying and drying a negative electrode material on the negative electrode current collector, and if necessary, the components as described above may be further included.
- the separator is interposed between the cathode and the anode, and an insulating thin film having high ion permeability and mechanical strength is used.
- the lithium salt-containing non-aqueous electrolyte solution consists of a nonaqueous electrolyte solution and a lithium salt, and a liquid nonaqueous electrolyte solution, a solid electrolyte, an inorganic solid electrolyte, and the like are used as the nonaqueous electrolyte solution.
- the current collector the electrode active material, the conductive material, the binder, the filler, the separator, the electrolyte, the lithium salt, and the like are known in the art, a detailed description thereof will be omitted herein.
- Such lithium secondary batteries may be prepared by conventional methods known in the art. That is, it may be prepared by inserting a porous separator between the anode and the cathode and injecting the electrolyte therein.
- the positive electrode may be manufactured by, for example, applying a slurry containing the lithium transition metal oxide active material, the conductive material, and the binder described above onto a current collector and then drying.
- the negative electrode can be prepared by, for example, applying a slurry containing the above-described carbon active material, a conductive material and a binder onto a thin current collector and then drying it.
- the plate-shaped battery cell may preferably have a structure in which two plate-shaped battery cells are arranged in a plane so that the electrode terminals are aligned in one direction.
- the battery cells may have a structure in which they are electrically connected in parallel or in series with each other via a PCM.
- the battery pack according to the present invention has a thickness corresponding to the thickness of approximately one battery cell by the planar arrangement of the battery cells, for example, 1 to 10% of the thickness of the battery cell or more than that. It can be of large size.
- the pack frame may have a structure including a battery cell separating wall in which battery cells are disposed between one side adjacent to each other and integrally formed with the pack frame so as to prevent flow of the battery cells stored therein. . Therefore, the presence of the separating walls in the adjacent portions of the battery cells, it is possible to more securely and securely accommodate the battery cells stored in the pack frame.
- a partition wall is formed in a size corresponding to the outer dimensions of each battery cell, it is possible to provide a more simple assembly process in the assembly process for mounting the battery cell to the pack frame.
- At least one side surface of the pack frame may be a structure in which at least one fastening portion formed to protrude outward in a direction parallel to the planar arrangement direction of the plate-shaped battery cells is formed.
- This fastening part may serve as a fastening fixing member so that the pack frame can be more firmly and stably fixed to the application device.
- fastenings can be fastened to each other by means of bolts and nuts with the application device, and can be fastened to each other by means of rivets or hook structures. Therefore, the battery cells stored in the pack frame can be guaranteed for stability even after being applied to the device.
- At least one side of the pack frame may have a structure in which one or more openings are formed so that a bus bar or a wire can be drawn out from the PCM.
- the opening may be formed at any one side of the pack frame, but preferably, may be formed at a position adjacent to the battery cell sealing surplus.
- the bus bar or wire is drawn out from the PCM connection terminal part and electrically connected to the external connection terminal part, that is, the circuit of the external device, and serves as an electrically conductive member for charging and discharging and sensing the battery cells stored in the pack frame.
- the PCM may be in various forms, for example, a printed circuit board (PCB) on which a protection circuit is printed.
- PCB printed circuit board
- the battery pack may have a structure including one PCM electrically connected to the electrode terminals of the battery cells stored in the pack frame and mounted on the battery cell sealing excess.
- the plurality of battery cells stored inside the pack frame can be electrically connected to a single PCM, and the PCM can be mounted on the battery cell sealing surplus, a more compact structure than the conventional battery pack Provides a battery pack.
- the PCM since only one PCM is applied, it is possible to achieve an effect of simplifying the electrical wiring as compared with the conventional battery pack.
- the PCM may be mounted on the battery cell sealing excess alone, but preferably, it may be mounted on the sealing excess after being mounted in the intermediate mold.
- the size of the intermediate mold is not particularly limited as long as it is a shape and a size corresponding to the battery cell sealing surplus.
- the length of the intermediate mold corresponds to the length of the sealing surplus width of all battery cells stored in the pack frame. It may be formed of a structure.
- the PCM can be protected from impact by external force by the intermediate mold and mounted on the intermediate mold having a shape and size corresponding to the battery cell sealing surplus, so that the PCM can be mounted on the battery cell surplus more stably and firmly. have.
- an insulation tape may be additionally attached to the single excess and the intermediate mold die, for example, the insulation tape may be a double-sided tape.
- the PCM can be mounted more stably and firmly on the battery cell sealing surplus, and can prevent an electrical short circuit between the circuit elements mounted on the PCM and the battery cell sealing surplus due to the characteristics of the insulating tape. have.
- the battery cell is particularly preferably a pouch-type battery which can be manufactured with a small weight and thickness, but of low mechanical strength, and among them, a lithium ion polymer battery having a low possibility of leakage of electrolyte solution is particularly preferable.
- the pouch-type battery when the pouch-type battery is seated in the space inside the pack frame, it is empty between the top surface of the pack frame due to the configuration of electrode terminals, protection circuit modules (PCMs), and insulating materials that are mounted or coupled to the top of the pack frame. Space occurs.
- the upper end of the battery is relatively fragile, and when the battery pack falls or an external shock is applied, deformation may be easily caused, resulting in a defect. For example, if the battery moves to the top of the inner space of the pack frame by dropping or applying an external impact, a short may be caused by the electrical contact between the elements, and conversely, the battery moves to the bottom of the inner space of the pack frame. When moved, the electrical connections of the devices located on the top of the cell may be cut off.
- One of the features of the present invention is an insulating member that can act as a buffer against dropping, external impact, etc. and complementary electrical connections on the inner space formed by the sealing surplus and the pack frame, the intermediate mold and the protection circuit module. Is applied.
- the insulating member is preferably made of a material which is hot melted and applied onto the space formed by the sealing surplus and the pack frame, the intermediate mold and the protection circuit module and then solidified.
- specific examples of such materials include plastic resins, but are not limited thereto.
- plastic resins it may be desirable to have a thermoplastic material whose melting point is in a temperature range that does not cause deformation of the elements located between the top surface of the pack frame and the top of the cell.
- the space formed by the sealing surplus and the pack frame, the intermediate mold, and other materials that can be solidified by chemical reaction, physical reaction, etc. after being applied on the module are particularly insulated. It can be used without limitation.
- the chemical reaction is meant to include a reaction in which the material is solidified by curing with heat, light (visible light, ultraviolet light, etc.), a catalyst, and the like, and the physical reaction is due to the solidification of the material by vaporization of a solvent. It is meant to include reactions that occur.
- the insulating member may be further applied to other spaces between the outer surface of the battery and the inner surface of the pack frame.
- the present invention also provides a method for manufacturing the battery pack, the method for manufacturing a battery pack according to the present invention,
- the welding is not particularly limited as long as it is a welding capable of achieving electrical connection between the electrode terminal of the battery cell and the PCM.
- the welding may be spot welding.
- the present invention also provides a mobile device including the battery pack as a power source.
- the mobile device in which the battery pack according to the present invention may be used include a mobile device such as a notebook computer, a netbook, a tablet PC, a smart pad, and the like.
- the battery pack according to the present invention has a very high flexibility in the arrangement of the battery cells by a battery group having a variety of sizes and capacities, so that these problems can be solved at once.
- FIG. 1 is an exploded perspective view of a typical pouch type battery
- FIG. 2 is a perspective view of a coupled state of the pouch-type battery of FIG. 1;
- FIG. 3 is a perspective view of a battery pack of the prior art in which a pouch-type battery is incorporated;
- FIG. 4 is an exploded perspective view of the battery pack of FIG. 3;
- FIG. 5 is a perspective view of a cartridge in a state where four unit cells according to the prior art are embedded;
- FIG. 6 is a perspective view of a battery pack according to an embodiment of the present invention.
- FIG. 7 is an exploded perspective view of the battery pack shown in FIG. 6;
- FIGS. 8 to 12 are schematic diagrams showing a process of manufacturing a battery pack according to an embodiment of the present invention.
- FIG. 6 is a perspective view of a battery pack according to an embodiment of the present invention
- Figure 7 is an exploded perspective view of the battery pack shown in FIG.
- the battery pack 800 accommodates two battery cells 210 and 220 in the pack frame 500, and the label 700 has four sides of the pack frame 500. A portion of the two battery cells 210 and 220 is wrapped, and a barcode label 710 is additionally attached to an upper surface of the battery cells 210 and 220 not covered by the label 700.
- fastening portions 520 are formed at both sides of the pack frame 500 to protrude outward in a direction parallel to the planar arrangement direction of the battery cells 210 and 220 accommodated in the pack frame 500.
- the opening 530 is formed on one side of the top of the pack frame 500 so that the wires 310 serving as the external input / output terminals can be derived.
- the battery pack 800 includes a total of six members (battery cells 210 and 220, pack frame 500, PCM 300, intermediate mold 400, and plastic resin). 600, a label 700). In addition, two members (insulation tape 410, barcode label 710) are further configured.
- the two battery cells 210 and 220 are provided with negative electrode terminals 212 and 222 and positive electrode terminals 213 and 223 on one side including the sealing surplus portions 211 and 221.
- the pack frame 500 has an internal space for accommodating two battery cells 210 and 220 and has a frame structure surrounding only side surfaces of the battery cells 210 and 220.
- Fasteners 520 including fastening holes 521 are formed at both sides of the pack frame 500.
- the separation wall 510 interposed between the adjacent parts 230 of the battery cells 210 and 220 and fixed thereto. ) Is formed.
- one side of the PCM 300 is formed with wires 310 connected to the external input / output terminal unit 311 and drawn out.
- plastic resin 600 shown in Figure 7 is shown in a simple unfolded state for easy understanding of the components of the battery pack 800, the actual plastic resin 600 is the PCM 300 and the intermediate mold ( It is integrated with the pack frame 500 together with 400.
- the plastic resin 600 after the battery cells 210 and 220 are mounted to the pack frame 500 together with the PCM 300 and the intermediate mold 400, the plastic resin 600 is heat-melted to the battery cell sealing excess ( The space formed by the 211, 221 and the pack frame 500, and after being applied on the intermediate mold 400 and the PCM 300, is solidified.
- FIGS. 8 to 12 are schematic diagrams showing a process of manufacturing a battery pack according to an embodiment of the present invention.
- the battery cells 210 and 220 bend 240 upwardly the sealing surplus portions 214 and 224 formed on both sides, and then the electrode terminals 212, One side surface (mutual adjoining portion 230) is arranged in a plane and in contact with each other so that the 213, 222, and 223 are aligned in one direction.
- the PCM is connected to the battery cells 220 and 210, the wires 310 that act as external input and output terminals connected to the external input and output terminal unit 311.
- the electrode terminals 223, 222, 213, and 212 of the battery cells 210 and 220 may be connected to the spot welding 320 at the terminal connections 301, 302, 303, and 304 of the PCM 300, respectively. Is connected by.
- a third step (C) the insulating tape 410 is attached 411 to the intermediate mold 400.
- the intermediate mold 400 to which the insulating tape 410 is attached is mounted on the PCM 300.
- the intermediate mold 400 having the PCM 300 mounted therein bends the electrode terminals 223, 222, 213, and 212 to be mounted on the battery cell sealing excess. do. At this time, the intermediate mold 400 is firmly mounted on the battery cell sealing surplus by the insulating tape 410 which simultaneously serves as a double-sided tape.
- a sixth step F the battery cells 210 and 220 are mounted to the pack frame 500 together with the PCM 300 and the intermediate mold 400.
- the separation wall 510 formed at the center portion of the pack frame 500 is interposed between the adjacent portions 230 of the battery cells 210 and 220 to firmly hold the two battery cells 210 and 220. It is fixed.
- the plastic resin 600 is hot melted to form a space 400 formed by the battery cell sealing surplus portions 211 and 221 and the pack frame 500, and the intermediate mold 400 and the PCM. It is solidified after being applied on 300.
- the label 700 surrounds the four sides of the pack frame 500 and a portion of the two battery cells 210, 220.
- the barcode label 710 is additionally attached to the top surface of the battery cells 210 and 220 which are not wrapped in the label 700.
- the battery pack according to the present invention is capable of manufacturing a battery pack having a thin thickness without using an ultrasonic welding method, and thus does not require the use of a precise and expensive ultrasonic welding machine, and the assembly process is very simple. Since the insulating member is filled and solidified in the space between the upper end and the inner surface of the upper end of the battery pack, there is an effect of preventing a short circuit or power failure due to the movement of the battery even when the battery is dropped or an external shock is applied.
- the battery pack according to the present invention is configured by combining the battery cells to correspond to the design shape of the device to configure the design of the battery pack, it can be flexibly applied to fit the various shapes of the device while maintaining high capacity performance.
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- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Battery Mounting, Suspending (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims (25)
- 밀봉 잉여부를 포함하는 일측면에 음극단자 및 양극단자가 형성되어 있고, 전극단자들이 일측 방향으로 정렬되도록 평면 배열된 둘 이상의 판상형 전지셀들(battery cells);상기 평면 배열된 판상형 전지셀들의 상면 및 하면이 개방된 상태로 전지셀의 외주면을 감싸는 둘 이상의 전지셀 수납부들을 포함하고 있는 팩 프레임(pack frame);상기 전지셀들의 일측 방향으로 정렬된 전극단자들에 전기적으로 연결되어 있고, 전지팩의 작동을 제어하는 보호회로 모듈(PCM);상기 보호회로 모듈을 수납하고, 상기 밀봉 잉여부 상에 탑재되는 중간 몰드(middle mold);상기 중간 몰드 및 보호회로 모듈이 상기 팩 프레임과 일체화 되도록, 상기 밀봉 잉여부 및 팩 프레임에 의해 형성되는 공간, 및 중간 몰드 및 보호회로 모듈 상에 적용되는 전기 절연성 부재; 및상기 전지셀들과 팩 프레임 및 전기 절연성 부재를 감싸는 라벨(label);을 포함하고 있는 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 판상형 전지셀은 각형 이차전지 또는 파우치형 이차전지인 것을 특징으로 하는 전지팩.
- 제 2 항에 있어서, 상기 파우치형 이차전지는 수지층과 금속층을 포함하는 라미네이트 시트에 전극조립체가 밀봉되어 있는 구조로 이루어진 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 전지셀은 리튬 이차전지인 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 전극단자들이 일측 방향으로 정렬되도록 2개의 판상형 전지셀들이 평면 배열되어 있는 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 전지셀들은 PCM을 경유하여 상호 전기적으로 병렬 연결 또는 직렬 연결되어 있는 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 팩 프레임의 두께는 전지셀의 두께와 동일하거나 10% 이하의 크기로 큰 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 팩 프레임은, 내부에 수납한 전지셀들의 유동을 방지하도록, 전지셀들이 서로 인접하는 일측면 사이에 위치하고, 팩 프레임과 일체형으로 형성되어 있는 전지셀 분리벽을 포함하는 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 팩 프레임의 적어도 일측면에는, 상기 판상형 전지셀들의 평면 배열 방향과 평행한 방향으로 외부로 돌출되어 형성된 하나 이상의 체결부가 형성되어 있는 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 팩 프레임의 적어도 일측면에는, 상기 PCM으로부터 외부로 버스 바 또는 와이어가 도출될 수 있도록, 하나 이상의 개구부가 형성되어 있는 것을 특징으로 하는 전지팩.
- 제 10 항에 있어서, 상기 개구부는 팩 프레임의 측면들 중 전지셀 밀봉 잉여부와 인접한 위치에 형성되어 있는 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 PCM은 보호회로가 인쇄되어 있는 인쇄회로기판(PCB)인 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 전지팩은, 팩 프레임 내부에 수납된 전지셀들의 전극단자들과 전기적으로 연결되고, 전지셀 밀봉 잉여부 상에 탑재되는 한 개의 PCM을 포함하는 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 중간 몰드는, 팩 프레임 내부에 수납된 모든 전지셀들의 밀봉 잉여부 폭 길이와 대응되는 길이로 형성되어 있는 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 밀봉 잉여부와 중간 몰드 사이에 절연 테이프가 추가로 부착되어 있는 것을 특징으로 하는 전지팩.
- 제 15 항에 있어서, 상기 절연 테이프는 양면 테이프인 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 전기 절연성 부재는, 열용융되어 상기 밀봉 잉여부 및 팩 프레임에 의해 형성되는 공간, 및 중간 몰드 및 보호회로 모듈 상에 적용된 후 고화되는 소재로 되어있는 것을 특징으로 하는 전지팩.
- 제 17 항에 있어서, 상기 소재는 플라스틱 수지인 것을 특징으로 하는 전지팩.
- 제 18 항에 있어서, 상기 플라스틱 수지는 그것의 융점이 팩 프레임 상단 내면과 PCM에 위치하는 소자들의 변형을 유발하지 않는 온도 범위에 있는 열가소성 수지인 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 전기 절연성 부재는, 상기 밀봉 잉여부 및 팩 프레임에 의해 형성되는 공간, 및 중간 몰드 및 보호회로 모듈 상에 적용된 후 화학적 반응 또는 물리적 반응에 의해 고화되는 소재인 것을 특징으로 하는 전지팩.
- 제 1 항에 있어서, 상기 전기 절연성 부재는 전지셀의 외면과 팩 프레임 내면의 기타 이격 공간에도 더 적용되는 것을 특징으로 하는 전지팩.
- 제 1 항 내지 제 21 항 중 어느 하나에 따른 전지팩을 제조하는 방법으로서,(a) 전지셀들을 전극단자들이 일측 방향으로 정렬되도록 평면 배열하는 단계;(b) 전지셀의 전극단자를 용접에 의해 PCM에 연결하는 단계;(c) PCM에 중간 몰드를 장착하는 단계;(d) 중간 몰드를 전지셀의 밀봉 잉여부상에 탑재하는 단계;(e) 전지셀을 팩 프레임에 장착하는 단계;(f) 중간 몰드 및 PCM 상에 전기 절연성 부재를 적용하는 단계; 및(e) 전지셀을 포함한 팩 프레임에 라벨을 부착하는 단계;를 포함하는 것을 특징으로 하는 전지팩 제조 방법.
- 제 22 항에 있어서, 용접은 스폿(spot) 용접인 것을 특징으로 하는 전지팩 제조 방법.
- 제 1 항 내지 제 21 항 중 어느 하나에 따른 전지팩을 전원으로 포함하는 것을 특징으로 하는 모바일 디바이스.
- 제 24 항에 있어서, 상기 모바일 디바이스는 노트북 컴퓨터, 넷북, 태플릿 PC 또는 스마트 패드인 것을 특징으로 하는 모바일 디바이스.
Priority Applications (4)
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CN201480052596.8A CN105580161B (zh) | 2013-09-30 | 2014-07-16 | 具有电绝缘构件的电池组 |
US15/024,617 US10312482B2 (en) | 2013-09-30 | 2014-07-16 | Battery pack having electric insulating member |
JP2016516853A JP6178504B2 (ja) | 2013-09-30 | 2014-07-16 | 電気絶縁性部材を含む電池パック |
EP14847041.2A EP3038188B1 (en) | 2013-09-30 | 2014-07-16 | Battery pack comprising electrically insulating member |
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KR10-2013-0116641 | 2013-09-30 | ||
KR1020130116641A KR101699855B1 (ko) | 2013-09-30 | 2013-09-30 | 전기 절연성 부재를 포함하는 전지팩 |
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EP (1) | EP3038188B1 (ko) |
JP (1) | JP6178504B2 (ko) |
KR (1) | KR101699855B1 (ko) |
CN (1) | CN105580161B (ko) |
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KR102092111B1 (ko) * | 2015-06-05 | 2020-03-23 | 주식회사 엘지화학 | 전극단자 용접 장치 |
KR102183995B1 (ko) * | 2016-10-31 | 2020-11-27 | 삼성에스디아이 주식회사 | 배터리 팩 |
KR102221781B1 (ko) | 2017-07-21 | 2021-03-02 | 주식회사 엘지화학 | 배터리 팩 |
KR102384153B1 (ko) * | 2018-01-09 | 2022-04-06 | 주식회사 엘지에너지솔루션 | 이형지 커버를 포함하는 전지팩 |
EP4329056A2 (en) | 2019-01-09 | 2024-02-28 | BYD Company Limited | Power battery pack and electric vehicle |
KR20200124552A (ko) * | 2019-04-24 | 2020-11-03 | 삼성에스디아이 주식회사 | 배터리 팩 |
KR102357832B1 (ko) * | 2019-05-08 | 2022-02-03 | 삼성에스디아이 주식회사 | 배터리 팩 |
CN110416461B (zh) * | 2019-08-09 | 2022-04-15 | 湖北华中光电科技有限公司 | 一种抗冲击电池仓 |
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2013
- 2013-09-30 KR KR1020130116641A patent/KR101699855B1/ko active IP Right Grant
-
2014
- 2014-07-16 US US15/024,617 patent/US10312482B2/en active Active
- 2014-07-16 WO PCT/KR2014/006415 patent/WO2015046725A1/ko active Application Filing
- 2014-07-16 CN CN201480052596.8A patent/CN105580161B/zh active Active
- 2014-07-16 JP JP2016516853A patent/JP6178504B2/ja active Active
- 2014-07-16 EP EP14847041.2A patent/EP3038188B1/en active Active
- 2014-07-28 TW TW103125702A patent/TWI525879B/zh active
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JP2004356027A (ja) * | 2003-05-30 | 2004-12-16 | Sanyo Electric Co Ltd | 薄型バッテリパック |
KR20080036738A (ko) * | 2006-10-24 | 2008-04-29 | 삼성에스디아이 주식회사 | 이차전지 및 그 제조방법 |
KR20100082678A (ko) * | 2009-01-09 | 2010-07-19 | 주식회사 엘지화학 | 신규한 구조의 전지팩 |
KR20130030285A (ko) * | 2011-08-09 | 2013-03-26 | 주식회사 엘지화학 | 이차전지 팩 |
JP2013080569A (ja) * | 2011-10-03 | 2013-05-02 | Sanyo Electric Co Ltd | 電池パック |
Non-Patent Citations (1)
Title |
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See also references of EP3038188A4 * |
Also Published As
Publication number | Publication date |
---|---|
CN105580161B (zh) | 2018-01-23 |
JP6178504B2 (ja) | 2017-08-09 |
US10312482B2 (en) | 2019-06-04 |
TW201530855A (zh) | 2015-08-01 |
CN105580161A (zh) | 2016-05-11 |
KR20150037222A (ko) | 2015-04-08 |
JP2016536738A (ja) | 2016-11-24 |
EP3038188A1 (en) | 2016-06-29 |
KR101699855B1 (ko) | 2017-01-25 |
EP3038188A4 (en) | 2016-09-07 |
TWI525879B (zh) | 2016-03-11 |
EP3038188B1 (en) | 2018-05-09 |
US20160211493A1 (en) | 2016-07-21 |
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