WO2006109610A1 - Procede de production pour un assemblage de dispositif electrique et assemblage de dispositif electrique - Google Patents

Procede de production pour un assemblage de dispositif electrique et assemblage de dispositif electrique Download PDF

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Publication number
WO2006109610A1
WO2006109610A1 PCT/JP2006/307074 JP2006307074W WO2006109610A1 WO 2006109610 A1 WO2006109610 A1 WO 2006109610A1 JP 2006307074 W JP2006307074 W JP 2006307074W WO 2006109610 A1 WO2006109610 A1 WO 2006109610A1
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WO
WIPO (PCT)
Prior art keywords
electrode tabs
electrode
device assembly
electrical device
electrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2006/307074
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English (en)
Japanese (ja)
Inventor
Toshizo Hosoya
Takeshi Kanai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Subaru Corp
NEC Corp
NEC Lamilion Energy Ltd
Original Assignee
NEC Corp
NEC Lamilion Energy Ltd
Fuji Jukogyo KK
Fuji Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, NEC Lamilion Energy Ltd, Fuji Jukogyo KK, Fuji Heavy Industries Ltd filed Critical NEC Corp
Publication of WO2006109610A1 publication Critical patent/WO2006109610A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • 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
    • 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 an electric device assembly (for example, an assembled battery) in which a plurality of electric devices such as battery cells are assembled, and a method for manufacturing the same.
  • the present invention relates to a device that uses the extracted electrical device.
  • a lightweight and small battery has been developed as a power source for driving a motor of an electric vehicle.
  • an assembled battery in which multiple thin batteries (also called “battery cells”) are assembled is known.
  • Patent Document 1 discloses a method of connecting electrode tabs when manufacturing such an assembled battery.
  • the configuration of the assembled battery and the method of connecting the electrode tabs described in the same document will be described with reference to FIG.
  • the assembled battery 250 includes a plurality of battery cells 220 assembled in a stacked state, and positive and negative electrode tabs 225a and 225b are drawn out from each battery cell 220. Has been.
  • the battery cells 220 that are adjacent to each other are sandwiched between the electrode tabs 225a and 225b and the sandwiching member 240 that also has an insulating material force, whereby the battery cells 220 are electrically connected.
  • connection method disclosed in Patent Document 1 is to connect by sandwiching electrode tabs and bringing them into close contact with each other as described above.
  • laser welding or ultrasonic welding may be used for the connection between the electrode tabs as disclosed in Japanese Patent Laid-Open No. 2003-338275 (Patent Document 2).
  • connection method disclosed in Patent Document 1 has the advantage that the electrode tabs can be securely brought into close contact with each other using the clamping member 240.
  • the clamping member 240 since the clamping member 240 is used, it is not suitable for downsizing the assembled battery 250 as a whole.
  • connection method described in Patent Document 2 directly joins the electrode tabs by welding or the like without using a clamping member or the like, which is advantageous for downsizing the assembled battery. It is.
  • the connection method described in the same document, like Patent Document 1 involves welding the electrode tabs in a state where a plurality of battery cells are stacked, so there is room for improvement in terms of connection workability. Left behind!
  • the configuration shown in FIG. 17 is disadvantageous in terms of the viewpoint power to inspect the formed weld afterwards. That is, it is relatively difficult to inspect each welded part after welding with the battery cells overlapped in this way, and an efficient inspection operation cannot be performed.
  • the present invention has been made in view of the above-described problems, and an object of the present invention is to connect the electrode tabs with good workability, and afterwards connect the connection parts (welding parts, etc.). ), Even if it is inspected! It is to provide a method for manufacturing an electrical device assembly.
  • Another object of the present invention is a structure that can be manufactured by using the manufacturing method of the present invention, and the shikaji is also a case where the connecting portion between the electrode tabs is sandwiched between, for example, a pair of members. It is also easy to sandwich the device and provide an electrical device assembly.
  • a method of manufacturing an electrical device assembly of the present invention includes a step of preparing a plurality of electrical devices in which sheet-like electrode tabs are drawn out in opposite directions from two opposing sides; The step of arranging a plurality of electrical devices in a row so that the electrode tabs partially overlap each other due to the relationship between adjacent electrical devices, and the overlapping of the electrode tabs in a state where the plurality of electrical devices are arranged. There are a step of connecting the electrode tabs across the mating portion, and a step of stacking a plurality of electrical devices so as to be folded in a zigzag manner after connecting the electrode tabs.
  • the electric devices are arranged in a line and the electrode tabs are arranged in this state Connection. Therefore, workability is improved as compared with the method of connecting the electrode tabs in a state where the electrical devices are three-dimensionally overlapped as described above. In addition, according to such a method, there is an advantage that the inspection work can be easily performed even when the connection portion is inspected later.
  • the plurality of electric devices in the step of arranging the electric devices in a line, may be arranged so that the electrode tabs of the electric devices adjacent to each other are straight. I like it.
  • the present invention is not limited to the arrangement of the electric devices one by one as described above, and may be the following method. That is, another method for producing an electric device assembly of the present invention includes a step of preparing a plurality of electric devices in which opposing two-side force sheet-like electrode tabs are drawn out in opposite directions, and two or more electric devices. Stacking electrical devices and partially overlapping each of the electrode tabs drawn from the electrical devices to form a plurality of electrical device assemblies so that the stacked electrical devices are connected in parallel; In the relationship between adjacent electrical device assemblies, the device assembly is arranged in a row so that the portions where the electrode tabs overlap each other, and the electrode tabs are aligned between the electrical device assemblies. A step of connecting the electrode tabs in the overlapping portion of the electrode, and after connecting the electrode tabs to each other, the electrodes are folded in a zigzag manner. Laminating the device assembly, and has a.
  • the present invention may further be as follows.
  • the step of connecting the electrode tabs may include connecting a plate-like member made of a metal material cover to the overlapping portion of the electrode tabs.
  • the step of connecting the electrode tabs may use laser welding or ultrasonic welding.
  • the electrode tabs are overlapped from the surface opposite to the side where the plate members are disposed in a state where the plate members are disposed on one surface of the overlapping portion of the electrode tabs. It may include irradiating a laser beam to the mating portion.
  • the opposing two side forces are also pulled out in directions opposite to each other.
  • the plurality of electric devices are connected in series by connecting the electrode tabs, and are bent in a zigzag manner by bending the electrode tabs. Therefore, in the relationship between two electrical devices that are supported and adjacent to each other, the electrode tabs of one electrical device and the electrode tabs of the other electrical device are pulled out of each electrical device in a direction away from each other. Yes.
  • Another electrical device assembly of the present invention is formed by stacking a plurality of electrical devices having sheet-like electrode tabs drawn out in opposite directions to each other with opposing two-side forces so as to be connected in parallel. And a plurality of electrical device assemblies.
  • the plurality of electrical device assemblies are directly connected by connecting the electrode tabs to each other, and are zigzag folded by bending the electrode tabs so that the plurality of electrical device assemblies are electrically connected.
  • the connection between the electrode tabs connected to each other is supported by a fixed support, and is adjacent to one electrical device assembly in one electrical device assembly and one electrical device assembly in the other. In relation to the electric device, the electrode tab of one electric device and the electrode tab of the other electric device are pulled out from the electric devices in a direction away from each other.
  • the present invention may further be as follows. It is preferable that the drawing angle ⁇ of the electrode tabs drawn out in the direction away from each other is in the range of 0.5 ° to 6.0 ° with respect to the reference line in the drawing direction.
  • the electrode tabs drawn out from the electrical device in at least one of the plurality of electrical devices including not only the electrode tabs drawn away from each other but also other electrode tabs.
  • the force bent portion may be drawn straight along the reference line in the pulling direction, and the force may be bent at the bent portion.
  • the fixed support portion is disposed on the opposite side of the bus bar between the bus bar disposed in the region surrounded by the two electrode tabs drawn in the direction away from each other, and cooperates with the bus bar. And a plate-like member that sandwiches the connecting portion. Also
  • the plate-like member may be bonded to the overlapping portion between the electrode tabs.
  • the electrical device Since the electrode tabs are connected to each other in a lined state, the electrode tabs can be connected with good workability, and it is also advantageous when inspecting the connection parts (welded parts, etc.) afterwards. It is. Further, according to the electric device assembly of the present invention, the pair of electrode tabs are pulled out in a direction away from each other, so that a space between the electrode tabs is widened. Even when the connection portion between the electrode tabs is clamped, the clamping is easy.
  • FIG. 1 is a perspective view showing a battery cell in a single state.
  • FIG. 2A is a side view of the assembled battery for illustrating the manufacturing method of the first embodiment.
  • FIG. 2B is a plan view of the assembled battery shown in FIG. 2A.
  • FIG. 3 is a drawing for explaining the manufacturing method according to the first embodiment.
  • FIG. 4 is a diagram showing a specific example of a jig used during welding.
  • FIG. 5 is a diagram for explaining the manufacturing method of the second embodiment.
  • FIG. 6 is a drawing for explaining the manufacturing method of the second embodiment.
  • FIG. 7 is a perspective view showing an assembled battery and a storage box for storing it.
  • FIG. 8 is a perspective view showing the storage box of FIG. 7 in a single state.
  • FIG. 9A is a side view at the connection portion of the electrode tab in the assembled battery for explaining the manufacturing method of the third embodiment.
  • FIG. 9B is a plan view of the part shown in FIG. 9A.
  • FIG. 10 is a perspective view showing a pair of members that sandwich a connection portion between electrode tabs.
  • FIG. 11 is a schematic diagram showing a state in which the connecting portion between the electrode tabs is sandwiched between the pair of members shown in FIG.
  • FIG. 12A is a diagram showing a configuration of an assembled battery according to a fourth embodiment.
  • FIG. 12B is an enlarged view of the lead portion of the electrode tab in FIG. 12A.
  • FIG. 13 is a diagram showing a configuration of another assembled battery according to the fourth embodiment.
  • FIG. 14 is a view showing, as a comparative example, a configuration in which three battery cells having electrode tabs having the same length are assembled.
  • FIG. 15 is a diagram showing a configuration of an assembled battery according to a fifth embodiment.
  • FIG. 16A A diagram showing a state before connection of the cell sample for explaining a method of manufacturing the assembled battery according to the fifth embodiment.
  • FIG. 16B A diagram showing a state after connection of the cell assembly for explaining the method of manufacturing the assembled battery according to the fifth embodiment.
  • FIG. 17 is a diagram showing an example of a method for joining electrode tabs in a conventional assembled battery. Explanation of symbols
  • the battery cell 20 includes a thin battery element 22 that outputs a predetermined electromotive force (for example, 3.6 V) and is hermetically sealed with an exterior film 24.
  • a sealing portion 23 in which the films are fused to each other is formed. From two sides of the sealing portion 23 facing each other, a sheet-like positive electrode tab 25a and a negative electrode tab 25b are drawn out in opposite directions.
  • Such a battery cell is sometimes called a “film-covered battery” because it uses an exterior film as an outer package of the battery element 22! /.
  • the electrode tabs 25a and 25b will be described more specifically.
  • the thickness of the electrode tabs 25a and 25b is, for example, about several hundred m (for example, 50 ⁇ to 300 / ⁇ m).
  • the electrode tabs 25a and 25b have flexibility. By providing the electrode tabs 25a and 25b with flexibility, the electrode tab can be bent in the form shown in FIG.
  • Each of the electrode tabs 25a, 25b is connected to the internal battery element 22, and a suitable material is selected according to the polarity.
  • the material of the electrode tab 25a for the positive electrode is selected from aluminum, an aluminum alloy, or any one of them subjected to alumite treatment or resin coating (“aluminum-based material”). be able to.
  • the material of the electrode tab 25b for the negative electrode is either copper, copper alloy, or a metal plating (for example, nickel plating) applied to them ("Copper-based material" and ⁇ ⁇ ). You can choose.
  • the entire assembled battery has a configuration in which a plurality of stacked battery cells 20 are connected in series. In FIG. 3, three battery cells 20 are shown. The number of power battery cells 20 is not limited to this! /.
  • the electromotive force per battery cell 20 is about 3.6 V as described above, for example, it is preferable to configure the assembled battery 50 by collecting, for example, 12 battery cells. In this case, the total output of the assembled battery as a whole is 43.2 V (3.6 VX 12 units), and the total output is 50 V or less in this way, for example, safety for workers handling the assembled battery 50. It is preferable in terms of increase.
  • FIG. 3 shows a state in which each battery cell 20 is housed in a cell case or the like!
  • the present invention is not limited to this.
  • each battery cell 20 may be accommodated in a predetermined cell case.
  • a plurality of battery cells 20 are prepared, and these are arranged in a line in a plane (two-dimensional) as shown in FIGS. 2A and 2B.
  • the electrode tab 25a for the positive electrode of one battery cell 20 and the electrode tab 25b for the negative electrode of the battery cell 20 adjacent thereto are partially overlapped with each other.
  • the portions where the electrode tabs 25a and 25b are overlapped are shown as overlapping portions 35A and 35B (hereinafter also referred to as “the overlapping portion 35” without distinction).
  • the electrode tab 25b for negative electrode is overlapped on the electrode tab 25a for positive electrode.
  • the other overlapping portion 35B has the opposite configuration.
  • FIG. 2A the force depicted in a state where the electrode tabs are separated from each other in any of the overlapping portions 35A and 35B.
  • the electrode tabs are in contact with each other in close contact with each other. Yes.
  • a predetermined jig (not shown) may be used, or the electrode tabs may be temporarily fixed using an adhesive or the like.
  • the form of superposition is changed in the superposition portions 35A and 35B as described above, but naturally the present invention is not limited to this, and all the superposition portions may have the same form. .
  • laser welding is sequentially performed on the overlapping portions 35A and 35B in a state where the battery cells 20 are arranged as described above.
  • Laser welding can be performed, for example, by irradiating a laser beam from the upper surface side while supporting the lower surface side of the overlapping portion 35 with the jig 38.
  • the shape of the welded portion formed in the overlapping portion 35 is not particularly limited, and may be, for example, a linear welded portion 30a as shown in the overlapping portion 35A, or the overlapping portion 35B. However, it may be a spot-like weld 30b as shown.
  • the battery cells 20 are connected to each other in this way, the battery cells 20 are folded one by one in a zigzag shape in the form shown in FIG. As a result, an assembled battery 50 in which a plurality of battery cells 20 are stacked is manufactured.
  • the rigidity thereof is higher than that of the other portion (the portion having one electrode tab). Therefore, as illustrated in FIG. 3, the overlapping portion 35A remains substantially flat, and the electrode tabs 25a and 25b are curved in a natural R shape at both upper and lower ends of the overlapping portion 35A.
  • a spacer (not shown) is used, for example, between lmm to the main surfaces (referred to as maximum area surfaces) of the battery cells 20. It is preferable to secure a gap of about 3 mm. This is because the heat of the battery cell 20 that generates heat during use can be released through this gap.
  • the electrode tabs of adjacent battery cells 20 are welded in a state where the plurality of battery cells 20 are arranged in a line, so that the battery cells 20 are three-dimensionally arranged. Therefore, workability is improved compared to the conventional method. Further, in the connection method of this embodiment, the electrode tabs can be overlapped with each other in a straight (flat) state without bending each electrode tab. Therefore, the tabs are in good contact with each other, so that the occurrence of poor welding is minimized. Further, for example, even when the formed welded portion is inspected after welding is performed on all the overlapping portions 35, this inspection can be performed with a plurality of battery cells 20 arranged in a plane. The inspection work is also easy and easy.
  • the electrode tabs can be connected to each other using a pair of clamping members as described with reference to FIG. Even in this case, it is possible to improve workability because the clamping member can be attached in a state where the plurality of battery cells 20 are arranged.
  • a resin sealant may be applied to the overlapping portions 35A and 35B after welding to make the overlapping portions 35A and 35B airtight.
  • the electrode tabs 25a and 25b which are different metals, are in close contact with each other, and such contact between different metals tends to cause problems due to electrolytic corrosion. This In order to prevent this, it is effective to make the contact portion between different metals airtight so that moisture does not enter the contact surfaces of the electrode tabs 25a and 25b.
  • FIG. 4 is a diagram showing a specific example of a jig used during welding.
  • the receiving jig 49 is a member that also supports the lower surface side force of the overlapping portion between the electrode tabs 25a and 25b.
  • a slit 49a is formed corresponding to a region where a welded portion (not shown) is formed.
  • the pair of holding jigs 48 is arranged on the opposite side of the receiving jig 49 with the electrode tabs 25a and 25b interposed therebetween, and is configured so that the overlapping portion can be pressed during welding. By using such jigs 48 and 49, the overlapped portion is stably held, which contributes to improvement in welding reliability.
  • FIG. 5 and 6 show a second embodiment of the present invention. That is, according to the present invention, as shown in FIG. 5 and FIG. 6 in which battery cells 20 are not connected one by one, a cell assembly in which a plurality (two in this embodiment) of battery cells 20 are connected in parallel. 27 may be connected in series.
  • each cell assembly 27 two battery cells 20 are stacked in the thickness direction of the battery cell, and the electrode tab 25a of one battery cell and the electrode tab 25a of the other battery cell face each other. It has become. That is, in the cell assembly 27, the two battery cells 20 are stacked so that the electrode tabs having the same polarity are drawn from the same side.
  • Each electrode tab 25a is bent into a predetermined shape in advance by, for example, a press carriage, so that the tip sides thereof are in close contact with each other.
  • the electrode tab 25b for negative electrode has the same configuration as the electrode tab 25a for positive electrode.
  • a predetermined gap is secured between the main surfaces of the battery cells 20 by a spacer (not shown).
  • the cell assemblies 27 are arranged in a line in a plane as in the first embodiment.
  • two electrode tabs 25a are positioned on the upper side in the overlapping portion 35C
  • the electrode tab 25b is positioned on the upper side in the overlapping portion 35D. This is also described in the first embodiment. As described above, the present invention is not limited to such a form.
  • the assembled battery of the present embodiment configured as described above can also be manufactured by the same method as in the first embodiment. That is, laser welding is sequentially performed on the overlapping portions 35C and 35D in a state where the cell assemblies 27 are arranged as described above. The four electrode tabs are joined by irradiating the overlapped part with a laser beam. After the cell assemblies 27 are connected to each other in this way, the cell assembly 27 is folded one by one in a form as shown in FIG.
  • the assembled battery 52 may be housed and used in a housing box 33 composed of a case 31 and a lid 32.
  • the storage box 33 is characterized in that, for example, a plurality of bus bars 39, which are plate-like members made of metal material, are attached to a part of the peripheral wall surface. More specifically, a plurality of bar grooves 37 are formed on the side surface of the case 31, and one bus bar 39 is attached to each bar groove 37.
  • the nose bar 39 functions as a voltage extraction terminal corresponding to each battery 20 by being connected to each of the connection portions of the electrode tabs 25a and 25b as will be described later. That is, by connecting a predetermined electrical circuit to each voltage extraction terminal (bus bar 39), the voltage of each battery cell 20 is managed, or even if an abnormality occurs in one battery cell 20, the entire circuit It is possible to install a fuse for each battery cell 20 so that the battery is not damaged.
  • the bus bar 39 is attached to the side of the case as shown in FIG. This increases the rigidity of the entire storage box.
  • the present invention can also be applied to the assembled battery 52 using the bus bar 39.
  • the nose bar 39 is positioned below the overlapped portion.
  • the electrode tabs 25a, 25b and the bus bar 39 are shown in a state where they are separated from each other.
  • a laser beam is irradiated from the upper side (the side opposite to the side where the bus bar 39 is disposed) with respect to the overlapping portion of the electrode tabs.
  • the two electrode tabs 25a, 25b and the bus bar 39 are joined to each other.
  • Subsequent steps are similar to the first embodiment, whereby the battery cells 20 with bus bars are manufactured by folding the battery cells 20 in a zigzag shape. The battery cells 20 are folded so that the bus bar 39 is outside the electrode tabs 25a and 25b.
  • the assembled battery 52 with a bus bar manufactured by the above process is disposed in the case 31, and the final battery is assembled by attaching the bus bar 39 to the bar groove 37 on the side surface of the case.
  • the surface (upper surface in FIG. 9A) of the bus bar 39 that is in close contact with the electrode tab is preferably a flat surface. Yes.
  • the same advantages as those of the first embodiment are obtained by performing the welding process by arranging the battery cells 20 in a plane.
  • the bus bar 39 can be joined together, so that a further advantage can be obtained that the work process can be simplified.
  • the bus bar 39A attached to the side surface of the case is arranged inside the electrode tabs 25a and 25b, and the electrode tab is sandwiched between the bus bar 39A and the fixing member 36.
  • the bus bar 39A needs to be joined to the overlapping portion of the electrode tabs. What is necessary is just to join the fixing member 36 to the overlapping part of electrode tabs.
  • the fixing member 36 can be joined in the same manner as described above with reference to FIG. 9A.
  • the fixing member 36 When assembling the battery, the fixing member 36 is joined, and the assembled battery folded in zigzag is inserted into the case 31, and then the bus bar 39A is positioned inside the electrode tabs 25a and 25b. Install on the side. Next, both ends of the fixing member 36 are fixed to the bus bar 39A. As a result, the overlapping portion of the electrode tab is sandwiched between the bus bar 39A and the fixing member 36, and the nose bar 39A is brought into conduction with the electrode tab.
  • FIG. 11 shows a state in which the tip side force of the electrode tab of each battery cell is fixedly supported by the bus bar 39A and the fixing member 36 described with reference to FIG.
  • the bus bar 39A and the fixing member 36 constitute a fixed support portion, and the connection portion between the electrode tabs is supported by the fixed support portion.
  • FIG. 12A shows an enlarged view of the electrode tab lead-out portion of FIG. 12A.
  • the electrode tab 25a of one battery cell 20 and the electrode tab 25b of the other battery cell 20 extend from each battery cell 20 in a direction away from each other. Yes.
  • the electrode tab lead angle ⁇ at this time may be within a range of, for example, 0.5 ° to 6.0 ° with respect to the reference line L in the lead-out direction. If the angle ⁇ is smaller than 0.5 °, the effect of giving the electrode tab a sufficient space cannot be obtained. On the other hand, if the angle ⁇ exceeds 6.0 °, the electrode tab is too long and requires extra space.
  • the electrode tab when the electrode tab is pulled out at a steep angle, that is, when the electrode tab 25a is bent at a steep angle, for example, the base tab force is also bent, the tab is bent and sealed. There is a risk that the stopper 23 may be subjected to a force to peel off the films. If such a force is applied, the airtightness of the sealing portion 23 may be impaired. This means a decrease in the reliability of the battery cell 20. From this point of view, it is preferable that the lead angle ⁇ of the electrode tab be kept relatively small.
  • the electrode tab 25a has a base force in the region L up to a predetermined distance.
  • region L The specific dimensions of region L are variously changed in consideration of the size of battery cell 20 and the like.
  • the bending of the electrode tab as described above may be performed, for example, by a pre-press carriage.
  • an R portion 26b bent with a curvature on the tip side of each electrode tab it is preferable to have an R portion 26b bent with a curvature on the tip side of each electrode tab.
  • the radius of curvature of the R portion 26b may be, for example, about 5 times the thickness of the electrode tab.
  • the R portion 26b may be formed by a predetermined process after the tabs are welded together, for example, by embossing using a jig or the like, or through such a prior process. It is naturally formed when the zigzag is folded.
  • the following advantages can be obtained by adopting the configuration as described above.
  • the electrode tabs 25a and 25b are relatively long, the electrode tabs are damaged even if the battery cell 20 is moved under some impact force. Hard to occur.
  • the electrode tabs 25a and 25b are bent in a direction away from each other, a space surrounded by the electrode tabs 25a and 25b is widened. This is advantageous in that the above-described bus bar 39A can be easily placed in this space.
  • Fig. 13 shows a configuration example in which the fourth embodiment is applied to a parallel type assembled battery. is doing.
  • the assembled battery 52 is formed by connecting the cell assemblies 27 as in the second embodiment, and the inner electrode tabs are denoted by reference numerals 25a 'and 25b'.
  • the outer electrode tabs are indicated by reference numerals 25a and 25b.
  • Inner electrode tabs 25a 'and 25b' are provided in the same manner as in the configuration of FIG. In this way, the electrode tabs 25a ′ and 25b ′ are pulled out by being directed outward (forced away from each other) and bent at the R portion 26b.
  • the space between 25b ' is wide. Therefore, as described above, there is an advantage that the nose bar 39A can be easily placed in this space. Furthermore, such a configuration can be performed even if all electrode tabs are the same length.
  • the battery cells 20 having the same configuration can be used, and it is not necessary to distinguish the battery cells in the manufacturing process. Also, it is preferable that the outer electrode tabs 25a and 25b be pulled out with a gentle extraction angle, as with the inner electrode tabs.
  • FIG. 14 shows an example in which a cell assembly 127 is configured by superposing three battery cells 120 having electrode tabs of the same length! / The electrode tab length!
  • the innermost (left side) electrode tab 125 is pulled out of the sealing portion 123 toward the outside (right side) at a relatively steep angle.
  • the electrode tab member is wasted and the electrode tab is pulled out at a relatively steep angle, so that an extra force may be applied to the sealing portion 123.
  • FIG. 12B if the bent portion 26a is provided in advance, it is different force. Otherwise, pulling out the electrode tab at a steep angle as described above means that the sealing portion 123 This means that a force is applied to peel the films apart. Therefore, from this point of view, it is preferable that the electrode tab is pulled out from the sealing portion 123 at a relatively gentle angle.
  • cell assembly 127 is a stack of three battery cells 120A, 120B, and 120C.
  • Battery cell 120A has the longest positive electrode tab 125a-3 and the shortest negative electrode.
  • Electrode tab 125b-l In the battery cell 120C, the shortest positive electrode tab 125a-l and the longest negative electrode tab 125b-3 are arranged opposite to the battery cell 120A.
  • the battery cell 120B is an intermediate battery, and includes a positive electrode tab 125a-2 and a negative electrode tab 125b-2 having an intermediate length.
  • the shortest electrode tabs 125a-l and 125b-l have the same length as the electrode tabs 25a and 25b in FIG. 12A (see FIG. 15). As a result, as shown in FIG. 15, the electrode tabs 125a-l and 125b-l are drawn away from each other, and the space between the electrode tabs is widened.
  • electrode tabs having different lengths may be provided in the process of manufacturing the battery cell.
  • the assembled battery 53 having the above-described configuration is manufactured as follows. First, the cell assemblies 127 are arranged in a plane so as to have a form as shown in FIG. 16B. In the overlapping portion 135A, the shortest electrode tabs 125a-l and 125b-l are partially overlapped with each other while being in a straight state. With respect to the remaining four electrode tabs, the respective leading ends are overlapped with the overlapping portions of the electrode tabs 125a-l and 125b-l.
  • the overlapping portion 135B is basically configured in the same manner as the above-described overlapping portion 135A !, but the bow I protruding position of each electrode tab is vertically inverted. Therefore, the position of the overlapping portion 135B is opposite to the overlapping portion 135A.
  • the cell assemblies 127 are connected to each other by welding the overlapping portions 135A and 135B in a state where the cell assemblies 127 are arranged in a plane as described above.
  • the assembled battery 53 according to the present embodiment is obtained by sequentially folding the cell assembly 127 in a zigzag shape.
  • the same advantages as those of the second embodiment can be obtained by arranging the cell assemblies 127 in a plane and performing the welding process.
  • the shortest power Since the polar tabs 125a-l and 125b-l are drawn away from each other as in the above embodiment, the same advantages as in the fourth embodiment can be obtained in this embodiment.
  • the length of each electrode tab is set to an appropriate length, and as a result, the angle of the electrode tab drawn out from the sealing portion 123 of each battery cell becomes relatively gentle. It is also possible to prevent extra force from being applied to part 123.
  • the battery cell 20 whose outer package is the outer film 24 is described as an example.
  • the battery cell electric device
  • the battery element 22 electrical device element
  • the battery element 22 used in the battery cell is a lithium ion secondary battery, specifically, a positive electrode such as lithium manganese oxide or lithium cobalt oxide.
  • a positive electrode plate coated with active material on both sides such as aluminum foil and a negative electrode plate coated with lithium-doped / de-doped carbon material on both sides such as copper foil are opposed to each other with a separator therebetween.
  • the battery elements may be battery elements of other types of chemical batteries such as nickel metal hydride batteries, nickel cadmium batteries, lithium metal primary batteries or secondary batteries, and lithium polymer batteries. Good.
  • the battery element is not limited to a laminated type, and a positive electrode side active electrode and a negative electrode side active electrode are stacked with a separator interposed between them, wound, and then compressed into a flat shape to compress the positive electrode side active electrode. It may be a wound type having a structure in which electrodes and negative electrode side active electrodes are alternately laminated.
  • the electric device element a device that stores and outputs electric energy such as a capacitor element such as an electric double layer capacitor or an electrolytic capacitor may be used.

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

Abstract

Cellules de batterie (20) ayant chacune des languettes d’électrode en forme de feuille (25a, 25b) conduites depuis des extrémités opposées étant connectées les unes aux autres de la manière suivante. D’abord, des cellules de batterie (20) sont agencées à plat dans une rangée de sorte que la languette d’électrode (25a) d’une cellule de batterie (20) et la languette d’électrode (25b) de l’autre cellule de batterie (20) se recouvrent partiellement l’une l’autre. Ensuite, les languettes d’électrode sont connectées les unes aux autres au niveau des parties en recouvrement (35A, 35B) où les languettes d’électrode se recouvrent. Puis, une pluralité de cellules de batterie (20) est stratifiée les unes sur les autres sous une forme espacée et repliée.
PCT/JP2006/307074 2005-04-05 2006-04-04 Procede de production pour un assemblage de dispositif electrique et assemblage de dispositif electrique Ceased WO2006109610A1 (fr)

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CN111063941A (zh) * 2019-12-11 2020-04-24 周俊英 一种锂电池极片叠片装置
CN111477797A (zh) * 2020-04-30 2020-07-31 昆山宝创新能源科技有限公司 折叠电池组和车辆
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CN115241578A (zh) * 2021-04-23 2022-10-25 泰星能源解决方案有限公司 层压电池的连接构造、电池组以及层压电池的连接方法
WO2023210587A1 (fr) 2022-04-28 2023-11-02 株式会社エンビジョンＡｅｓｃジャパン Cellule de batterie et module de batterie
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WO2024014321A1 (fr) 2022-07-12 2024-01-18 株式会社Ａｅｓｃジャパン Module de batterie et procédé de production de module de batterie
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EP2416431A4 (fr) * 2009-04-01 2013-10-23 Lg Chemical Ltd Module de batterie à structure de conception flexible de module et de milieu pour ensemble batterie de grande taille qui en est équipé
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KR101835542B1 (ko) 2009-12-18 2018-03-07 콘티넨탈 오토모티브 게엠베하 셀 인출 도체들 및 배터리 어레인지먼트를 접속하기 위한 방법
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EP2637236A1 (fr) * 2012-03-09 2013-09-11 Hitachi Ltd. Module de batterie et cellule de batterie plate
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EP3305460A4 (fr) * 2016-05-18 2018-07-11 LG Chem, Ltd. Appareil de soudage de fils, module de batterie fabriqué au moyen dudit appareil de soudage de fils et bloc-batterie comprenant ledit module de batterie
JP2018533820A (ja) * 2016-05-18 2018-11-15 エルジー・ケム・リミテッド リード溶接装置、該リード溶接装置によって製造されるバッテリーモジュール及び該バッテリーモジュールを含むバッテリーパック
DE102017200993A1 (de) 2017-01-23 2018-07-26 Audi Ag Verfahren zum Herstellen einer Batterie, Batterie und Kraftfahrzeug
DE102017200993B4 (de) * 2017-01-23 2021-02-25 Audi Ag Verfahren zum Herstellen einer Batterie, Batterie und Kraftfahrzeug
CN112740467A (zh) * 2018-09-19 2021-04-30 标致雪铁龙汽车股份有限公司 用于组装具有三重密封的部分重叠的两个金属板的方法
CN112740467B (zh) * 2018-09-19 2024-02-09 标致雪铁龙汽车股份有限公司 用于组装具有三重密封的部分重叠的两个金属板的方法
WO2020058592A1 (fr) * 2018-09-19 2020-03-26 Psa Automobiles Sa Procede d'assemblage de deux toles se chevauchant partiellement avec triple etancheite
FR3085869A1 (fr) * 2018-09-19 2020-03-20 Psa Automobiles Sa Procede d’assemblage de deux toles se chevauchant partiellement avec triple etancheite
CN114175334A (zh) * 2019-07-29 2022-03-11 三星Sdi株式会社 二次电池
JP7494284B2 (ja) 2019-07-29 2024-06-03 三星エスディアイ株式会社 二次電池
WO2021020708A1 (fr) * 2019-07-29 2021-02-04 삼성에스디아이(주) Batterie secondaire
JP2022541041A (ja) * 2019-07-29 2022-09-21 三星エスディアイ株式会社 二次電池
US11171391B2 (en) * 2019-09-09 2021-11-09 GM Global Technology Operations LLC Battery assembly and method
CN111063941A (zh) * 2019-12-11 2020-04-24 周俊英 一种锂电池极片叠片装置
CN113644389A (zh) * 2020-04-27 2021-11-12 北京小米移动软件有限公司 电池模组及其制作方法
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CN111477797A (zh) * 2020-04-30 2020-07-31 昆山宝创新能源科技有限公司 折叠电池组和车辆
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JP2021191589A (ja) * 2020-06-04 2021-12-16 古河電気工業株式会社 溶接方法、溶接装置、および電池アセンブリ
WO2022084648A1 (fr) * 2020-10-23 2022-04-28 Ricardo Uk Limited Blocs-batteries
GB2600147A (en) * 2020-10-23 2022-04-27 Ricardo Uk Ltd Battery packs
GB2600147B (en) * 2020-10-23 2022-11-23 Ricardo Uk Ltd Battery packs
IT202000026593A1 (it) * 2020-11-06 2022-05-06 Ferrari Spa Metodo di assemblaggio celle, unita' di accumulo e relativo pacco batteria veicolare
EP3996181A1 (fr) * 2020-11-06 2022-05-11 FERRARI S.p.A. Procédé d'assemblage de cellules, unité de stockage et bloc-batterie de véhicule correspondant
CN115241578A (zh) * 2021-04-23 2022-10-25 泰星能源解决方案有限公司 层压电池的连接构造、电池组以及层压电池的连接方法
JP2022167596A (ja) * 2021-04-23 2022-11-04 プライムプラネットエナジー＆ソリューションズ株式会社 ラミネートセルの接続構造、組電池およびラミネートセルの接続方法
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EP4080665A1 (fr) * 2021-04-23 2022-10-26 Prime Planet Energy & Solutions, Inc. Structure de connexion de cellules stratifiées; bloc-batterie et procédé de connexion de cellules stratifiées
US12315958B2 (en) 2021-04-23 2025-05-27 Prime Planet Energy & Solutions, Inc. Connection structure of laminate cells, battery pack, and method of connecting laminate cells
JP2023551213A (ja) * 2021-10-27 2023-12-07 エルジー エナジー ソリューション リミテッド バッテリーモジュールおよびこれを含むバッテリーパック
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