WO2008050720A1 - Storage battery manufacturing method - Google Patents
Storage battery manufacturing method Download PDFInfo
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- WO2008050720A1 WO2008050720A1 PCT/JP2007/070552 JP2007070552W WO2008050720A1 WO 2008050720 A1 WO2008050720 A1 WO 2008050720A1 JP 2007070552 W JP2007070552 W JP 2007070552W WO 2008050720 A1 WO2008050720 A1 WO 2008050720A1
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- WIPO (PCT)
- Prior art keywords
- storage device
- power storage
- electrode
- stacking direction
- electrode bodies
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
- H01G11/12—Stacked hybrid or EDL capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/74—Terminals, e.g. extensions of current collectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/74—Terminals, e.g. extensions of current collectors
- H01G11/76—Terminals, e.g. extensions of current collectors specially adapted for integration in multiple or stacked hybrid or EDL capacitors
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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
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
-
- 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
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
- H01M10/0418—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes with bipolar electrodes
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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
- H01M10/0477—Construction or manufacture in general with circular plates
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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
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
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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
- H01M50/531—Electrode connections inside a battery casing
- H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
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- 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
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- 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
- Y02E60/13—Energy storage using capacitors
-
- 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
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
- Y10T29/4911—Electric battery cell making including sealing
Definitions
- the present invention relates to a method for manufacturing a power storage device in which a plurality of electrode bodies are stacked via an electrolyte layer.
- a voltage detection tab for detecting the voltage of each unit cell is provided for each unit cell (see, for example, Patent Documents;! To 3). Specifically, a voltage detection tab is provided in a part of the current collector constituting the unit cell.
- the plurality of voltage detection tabs are arranged so as not to overlap each other when viewed from the stacking direction. This is to prevent voltage detection tabs adjacent in the stacking direction from contacting each other and short-circuiting.
- Patent Document 1 Japanese Patent Laid-Open No. 2005-11658 (paragraph number 0022, FIG. 2, FIG. 6, etc.)
- Patent Document 2 Japanese Patent Laid-Open No. 2005-235428 (FIGS. 17, 18, etc.)
- Patent Document 3 Japanese Unexamined Patent Application Publication No. 2004-319362 (Fig. 1, Fig. 3 etc.)
- a main object of the present invention is to provide a method for manufacturing a power storage device that can easily manufacture a power storage device in which a plurality of electrode bodies are stacked via an electrolyte layer. Means for solving the problem
- the present invention is a method of manufacturing a power storage device in which a plurality of electrode bodies are stacked via an electrolyte layer, and has a substantially rotationally symmetric outer shape when viewed from the stacking direction.
- the first step of forming an electrode body having terminal portions protruding outward from the power storage device and the plurality of electrode bodies obtained in the first step are viewed from the stacking direction.
- the plurality of terminal portions are arranged along one direction on the outer periphery of the power storage device from one end side to the other end side in the stacking direction of the power storage device.
- Electrode bodies can be stacked.
- the plurality of electrode bodies can be stacked such that the plurality of terminal portions are arranged at substantially equal intervals when viewed from the stacking direction.
- the outer shape of the electrode body when viewed from the stacking direction can be a substantially circular shape or a substantially regular polygon.
- the electrode body is composed of a current collector including a terminal portion, and a positive electrode layer and a negative electrode layer formed on surfaces of the current collector facing each other, with a force S.
- terminal portions of the electrode bodies located at both ends in the stacking direction of the power storage device can be used as terminal portions used for charging and discharging of the power storage device.
- the terminal portions of the electrode bodies arranged at positions different from both ends in the stacking direction of the power storage device among the plurality of electrode bodies are used. It can be set as the terminal part used.
- the power storage device of the present invention has a substantially rotationally symmetric outer shape when viewed from the stacking direction, and includes a plurality of terminals each including a terminal portion that protrudes outward from the power storage device.
- a plurality of electrode bodies and an electrolyte layer disposed between the electrode bodies, and the plurality of electrode bodies are arranged in the stacking plane so that the terminal portions do not overlap each other when viewed from the stacking direction. It is characterized by being laminated in a state where the angles of are different.
- a substrate having a plurality of wirings arranged along the outer periphery of the power storage device and electrically connected to each terminal portion can be provided.
- the method for manufacturing a power storage device of the present invention by using a plurality of electrode bodies having a substantially rotationally symmetric outer shape, and laminating these electrode bodies while varying the angles in the laminating plane, When viewed from the stacking direction, the plurality of terminal portions can be prevented from overlapping each other. In addition, since the electrode body having the same shape can be used, the power S can be reduced to reduce the manufacturing cost of the power storage device.
- FIG. 1 is an external perspective view of a secondary battery that is Embodiment 1 of the present invention.
- FIG. 2 is an exploded perspective view of a secondary battery that is Example 1.
- FIG. 3A is a front view showing a configuration of an electrode body in Example 1.
- FIG. 3B is a cross-sectional view showing the configuration of the electrode body in Example 1.
- FIG. 4 is a diagram for explaining a method of laminating electrode bodies in Example 1.
- FIG. 5 is a diagram showing a configuration for taking out the output of the secondary battery of Example 1.
- FIG. 6 is a diagram showing a configuration for taking out the output of the secondary battery of Example 1.
- FIG. 1 is an external perspective view of the secondary battery
- FIG. 2 is an exploded perspective view of the secondary battery
- FIG. 3A is a front view of a bipolar electrode used in the secondary battery
- FIG. 3B is a cross-sectional view of the bipolar electrode.
- FIG. 4 is a diagram for explaining a method of laminating bipolar electrodes.
- the secondary battery 1 of the present embodiment has a configuration in which the bipolar electrode (electrode body) 10 shown in FIG. 3 is stacked via the electrolyte layer 30 (see FIG. 2). As shown in FIG.
- the bipolar electrode 10 has a positive electrode layer 12 formed on one surface of a current collector 11 and a negative electrode layer 13 formed on the other surface facing the one surface. As shown in FIGS. 3A and 3B, the positive electrode layer 12 and the negative electrode layer 13 are formed in a region along the outer edge of the current collector 11 (excluding a voltage detection tab 11a described later).
- FIG. 3A shows one surface of the bipolar electrode 10 (surface on which the positive electrode layer 12 is formed).
- FIG. 3B shows a BB cross-sectional view in FIG. 3A.
- the current collector 11 can be formed of, for example, an aluminum foil or can be formed of a plurality of metals (alloys). It is also possible to use a current collector 11 with a metal surface coated with aluminum.
- the composite current collector aluminum or the like can be used as the material for the positive electrode current collector, and Lucky copper or the like can be used as the material for the current collector for the negative electrode.
- a positive electrode current collector and a negative electrode current collector that are in direct contact with each other are used, or a conductive layer is provided between the positive electrode current collector and the negative electrode current collector. Use force with S.
- Each electrode layer 12, 13 contains an active material corresponding to the positive electrode or the negative electrode.
- each electrode layer 12, 13 includes a conductive auxiliary agent, a node, a polymer gel electrolyte for increasing ion conductivity, a polymer electrolyte, an additive, and the like as necessary.
- a known material can be used as a material constituting each of the electrode layers 12 and 13.
- nickel oxide is used as the active material of the positive electrode layer 12
- MmNi Al Mn Co Mm: Misch metal
- the hydrogen storage alloy can be used.
- a lithium transition metal composite oxide can be used as the active material of the positive electrode layer 12, and carbon can be used as the active material of the negative electrode layer 13.
- the conductive agent acetylene black, carbon black, graphite, carbon fiber, or carbon nanotube can be used.
- a solid electrolyte polymer solid electrolyte or inorganic solid electrolyte
- the electrolyte layer 30 is not limited to a solid electrolyte.
- a gel or liquid electrolyte can also be used.
- a sealing material (not shown) is arranged between the current collectors 11 adjacent in the stacking direction, and the electrolyte is external (the secondary battery 1 of the secondary battery 1). It is necessary to prevent leakage to the outside. That is, the space in which the electrolyte is accommodated needs to be sealed by the sealing material and the current collector 11.
- the present invention can be applied to a secondary battery that is not a bipolar type as described in connection with the bipolar secondary battery 1 !.
- a secondary battery that is not a bipolar type an electrode body in which the same electrode layer (positive electrode layer or negative electrode layer) is formed on both surfaces of the current collector 11 or an electrode layer on only one surface of the current collector 11 is used. It is possible to use an electrode body in which is formed.
- the present invention can also be applied to a multilayer capacitor (electric double layer capacitor) as a power storage device described for the secondary battery 1.
- a multilayer capacitor electric double layer capacitor
- this laminated capacitor for example, a plurality of positive electrodes and negative electrodes are alternately stacked via separators.
- an aluminum foil is used as a current collector of an electrode body (positive electrode body or negative electrode body), activated carbon is used as a positive electrode active material and a negative electrode active material, and polyethylene is used as a separator.
- a porous membrane can be used.
- the current collector 11 has a voltage detection tab 11a protruding outward in the radial direction of the current collector 11.
- the current force of the current collector 11 excluding the voltage detection tab 11a is substantially circular (including manufacturing errors)!
- the voltage detection tab 11a is used to detect the voltage of the unit cell in the secondary battery 1 of the present embodiment, in other words, the voltage between two bipolar electrodes 10 adjacent in the stacking direction. By detecting the voltage of the single cell in this way, the capacity balance with other single cells can be adjusted.
- the single battery is a power generation element including the positive electrode layer 12 and the negative electrode layer 13 and the electrolyte layer 30 (see FIG. 2) sandwiched between the electrode layers 12 and 13.
- an electrode layer (positive electrode layer or negative electrode layer) is formed on one surface of the current collector.
- the current collectors of these electrode bodies 21 and 22 are each formed with a positive electrode tab 2 la and a negative electrode tab 22 a that protrude outward in the radial direction of the current collector.
- the positive electrode tab 2 la and the negative electrode tab 2 2a are used for charging and discharging the secondary battery 1.
- the region excluding the positive electrode tab 21a is formed in a substantially circular shape (including manufacturing errors).
- the region excluding the negative electrode tab 22a is formed in a substantially circular shape (including manufacturing errors).
- the width of the positive electrode tab 21a and the negative electrode tab 22a (the length in the circumferential direction of the secondary battery 1) is wider than the width of the voltage detection tab 11 1a (the same length as described above). It is summer.
- the current collectors of the electrode bodies 21 and 22 and the current collector 11 of the bipolar electrode 10 differ only in the shape of the tabs formed on these current collectors, and the region excluding the tabs is substantially the same. It has the same shape (substantially circular).
- the shapes of the tabs 21a and 22a and the shape of the tab 1la can be made substantially equal. With this configuration, all the current collectors constituting the secondary battery 1 can be formed in the same shape. Further, without forming the tabs 21a and 22a on the current collectors of the electrode bodies 21 and 22, wirings may be connected to the end faces (end faces in the stacking direction) of these current collectors. In this case, the electrode bodies 21 and 22 are formed in a substantially circular shape when viewed from the stacking direction.
- the secondary battery 1 of the present embodiment is formed in a substantially cylindrical shape, and a plurality of voltage detection tabs lla, positive electrode tabs 21a, and A negative electrode tab 22a is arranged.
- the tabs l la, 21a, and 22a are arranged so that they do not overlap each other when the secondary battery 1 is viewed from the stacking direction (the arrow X direction in FIG. 2)! / (See Figure 4).
- a sheet-like roll (metal foil) constituting the current collector 11 is prepared, and the positive electrode layer 12 is applied to one surface of the roll, and the negative electrode layer 13 is applied to the other surface.
- the positive electrode is applied to the surface of the current collector 11 by using a known coater coating method or inkjet coating method.
- the layer 12 and the negative electrode layer 13 can be formed.
- the current collector on which the positive electrode layer 12 and the negative electrode layer 13 are formed is formed by press molding or the like.
- the electrode bodies 21 and 22 located at both ends of the secondary battery 1 are formed by press molding or the like after applying a positive electrode layer or a negative electrode layer to one surface of the current collector.
- the electrolyte layer 30 is overlaid on the negative electrode body 22 having the negative electrode tab 22a, and the bipolar electrode 10 having the voltage detection tab 11a is overlaid on the electrolyte layer 30. Then, the electrolyte layer 30 is stacked on the bipolar electrode 10 and another bipolar electrode 10 is stacked. In this manner, the electrolyte layer 30 and the bipolar electrode 10 are stacked! After the desired number of electrolyte layers 30 and the bipolar electrode 10 are stacked, the positive electrode body 21 having the positive electrode tab 21a is stacked.
- the electrolyte layer 30 includes the positive electrode layer 12 of one bipolar electrode 10 and the negative electrode layer of the other bipolar electrode 10. It is arrange
- the tabs lla, 21a, 22a do not overlap each other when the secondary battery 1 is viewed from the stacking direction.
- the bipolar electrodes 10 and the electrode bodies 21 and 22 are arranged with different stacking angles (phases). This lamination method will be specifically described with reference to FIG.
- the voltage detection tab 11a of the bipolar electrode 10 is positioned at the position of the negative electrode tab 22a in the negative electrode body 22.
- the secondary battery 1 is laminated so as to be shifted in one circumferential direction (direction indicated by an arrow in FIG. 4). That is, when the secondary battery 1 is viewed from the stacking direction, the voltage detection tab 11a is stacked such that it is displaced from the negative electrode tab 22a by a predetermined angle.
- the shape of the current collector excluding the tabs 22a and 1 la is a substantially rotationally symmetric circular shape and is substantially equal to each other, the bipolar electrode 10 excluding the voltage detection tab 11a and The negative electrode body 22 excluding the negative electrode tab 22a overlaps (matches) each other when viewed from the stacking direction. The same applies to the case where the positive electrode body 21 is laminated.
- the voltage detection tab 11a of the laminated bipolar electrode 10 includes: Lamination is performed so that the voltage detection tab 11a of the laminated bipolar electrode 10 is displaced in one circumferential direction of the secondary battery 1 (direction indicated by an arrow in FIG. 4). That is, when viewed from the stacking direction, the stacked voltage detection tabs 11a are stacked so as to be shifted by a predetermined angle with respect to the stacked voltage detection tabs 11a.
- the shape of the bipolar electrode 10 excluding the voltage detection tab 11a is a circular shape that is substantially rotationally symmetric when viewed from the stacking direction and is substantially equal to each other.
- the other two bipolar electrodes 10 overlap (match) each other when viewed from the stacking direction.
- the plurality of voltage detection tabs 11a are arranged at equal intervals at a predetermined angle ⁇ .
- the predetermined angle ⁇ can be set appropriately.
- the outer periphery (360 degrees) of the nopolar electrode 10 is set to the number of bipolar electrodes 10 and electrode bodies 21 and 22 to be stacked, in other words, the tab l la, It can be set to a value divided by the number of 21a and 22a.
- the tabs lla, 21a, and 22a need not be arranged at equal intervals. That is, when viewed from the stacking direction, the intervals between the adjacent tabs lla, 21a, 22a in the circumferential direction of the secondary battery 1 are varied.
- the tabs lla, 21a, and 22a are placed at different positions when the secondary battery 1 is viewed from the stacking direction simply by stacking the bipolar electrodes 10 and the like while changing the stacking angle (phase).
- the ability to place S the shape of the bipolar electrode 10 excluding the tab 11a and the shape of the electrode bodies 21 and 22 excluding the tabs 21a and 22a are formed in a substantially circular shape that is rotationally symmetric. Electrode 10 and electrode bodies 21 and 22 can be stacked Therefore, it is not necessary to form electrode bodies with different tab positions according to the positions in the stacking direction as in the prior art, and the secondary battery 1 is manufactured using the bipolar electrodes 10 and the like having the same shape. I can do it. If the bipolar electrode 10 and the like having the same shape can be used, the manufacturing cost of the secondary battery 1 can be reduced as compared with the case where the bipolar electrode and the like having different shapes are formed.
- the bipolar electrode 10 having the same shape or the like is used. Since they are used, there is no need to stack them in a predetermined order. As a result, the secondary battery 1 can be easily manufactured. In addition, the productivity of the secondary battery 1 can be improved.
- FIG. 5 is a schematic diagram showing a first configuration for taking out the output of the secondary battery
- FIG. 6 is a schematic diagram showing a second configuration for taking out the output of the secondary battery. .
- the structure of the flexible substrate that is electrically and mechanically connected to the voltage detection tab 11a of the secondary battery 1 is different.
- the flexible substrate 40 is disposed on the outer periphery of the secondary battery 1 and has a plurality of wires (not shown) connected to the respective voltage detection tabs 11a. That is, the wiring of the flexible substrate 40 is provided by the number of voltage detection tabs 1 la! /.
- a terminal portion (not shown) is provided at an end portion of each wiring, and this terminal portion is electrically and mechanically connected to the corresponding voltage detection tab 11a.
- the terminal portion and the voltage detection tab 11a are connected with, for example, a force S that is connected using a conductive adhesive or connected via an anisotropic conductive film.
- some of the voltage detection tabs 11a are connected to one surface of the flexible board 40, and the other voltage detection tabs 11a are connected to the other side of the flexible board 40. Connected to the surface.
- the terminal portion of the wiring connected to the part of the voltage detection tabs 1 la is exposed on one surface of the flexible substrate 40. Yes. Further, the terminal portion of the wiring connected to the other voltage detection tab 11a is exposed on the other surface of the flexible substrate 40! /.
- one end of the flexible substrate 40 is bent into a cylindrical shape and connected to a voltage detection circuit (not shown). Thereby, the voltage of the unit cell can be detected in the voltage detection circuit.
- the flexible substrate 41 is disposed on the outer periphery of the secondary battery 1, and the inner peripheral surface of the flexible substrate 41 is connected to the tip of each voltage detection tab 1la. ! /
- the flexible substrate 41 includes a plurality of terminal portions (not shown) electrically and mechanically connected to each voltage detection tab 1 la, and these terminal portions. And a plurality of wirings (not shown) connected to each other.
- the terminal portion is exposed on the inner peripheral surface of the flexible substrate 41 (surface on the secondary battery 1 side).
- the terminal portion and the voltage detection tab 1 la are connected using, for example, a conductive adhesive.
- an anisotropic conductive film can be interposed for connection.
- control circuit controls the charging voltage and the discharging voltage for each cell based on the voltage output to the voltage detection circuit (not shown) via the flexible substrates 40 and 41. That power S. That is, the control circuit can detect the voltage of the single cell via the voltage detection circuit, and can adjust the current during charging / discharging for each single cell based on this detection voltage.
- the configuration in which the plurality of voltage detection tabs 11a and the voltage detection circuit are electrically connected is not limited to the configuration shown in FIGS. In other words, any configuration may be used as long as the wiring is electrically and mechanically connected to each voltage detection tab 11a and the voltage of the unit cell can be detected. Note that, if a configuration in which a plurality of wirings are arranged in one flexible substrate 40, 41 as in the present embodiment, the configuration for detecting the voltage of a single cell can be simplified with the force S.
- the shape of the bipolar electrode 10 excluding the voltage detection tab 11a and the shape of the electrode bodies 21 and 22 excluding the tabs 2la and 22a are formed in a substantially circular shape.
- bipolar electrodes excluding tabs l la, 21a, 22a 1 The shapes of 0 and the electrode bodies 21 and 22 can be formed into substantially regular polygons (including manufacturing errors). Note that the shape is not limited to a regular polygon as long as it has a rotationally symmetric shape when viewed from the stacking direction.
- the shape of the bipolar electrodes, etc., excluding the tabs is formed into a substantially regular polygon that is a rotational symmetry when viewed from the stacking direction, the stacking angles (phases) of these bipolar electrodes, etc. are made different. However, by stacking, it is possible to arrange S so that the tabs do not overlap when viewed from the stacking direction. In addition, when viewed from the stacking direction, the bipolar electrodes other than the tabs can be stacked so as to overlap (match) each other.
- the lamination angle of each bipolar electrode or the like depends on the angle occupied by one side of the regular polygon. It will be.
- any shape may be used as long as it is a regular polygon. However, in order to suppress contact between tabs or to efficiently arrange tabs using the entire outer surface of the secondary battery. It is preferable to use a regular polygon approximating a circle.
- the force arranged within the range of one round on the outer surface of 1 is not limited to this.
- the bipolar electrode 10 or the like can be laminated so that a plurality of tabs lla, 21a, 22a are arranged along a spiral locus on the outer surface of the secondary battery 1.
- the secondary battery 1 of the present embodiment can be used as a power storage device for driving a motor in, for example, an electric vehicle (EV), a hybrid vehicle (HEV), and a fuel cell vehicle (FCV).
- EV electric vehicle
- HEV hybrid vehicle
- FCV fuel cell vehicle
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CN2007800357290A CN101517808B (zh) | 2006-10-24 | 2007-10-22 | 蓄电装置及其制造方法 |
US12/086,998 US8133605B2 (en) | 2006-10-24 | 2007-10-22 | Method of manufacturing power storage device |
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JP2006-288180 | 2006-10-24 | ||
JP2006288180A JP4775226B2 (ja) | 2006-10-24 | 2006-10-24 | 蓄電装置の製造方法 |
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WO2008050720A1 true WO2008050720A1 (en) | 2008-05-02 |
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PCT/JP2007/070552 WO2008050720A1 (en) | 2006-10-24 | 2007-10-22 | Storage battery manufacturing method |
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US (1) | US8133605B2 (ja) |
JP (1) | JP4775226B2 (ja) |
CN (1) | CN101517808B (ja) |
WO (1) | WO2008050720A1 (ja) |
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US20110014520A1 (en) * | 2008-07-25 | 2011-01-20 | Tomohiro Ueda | Bipolar battery |
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JP5870588B2 (ja) * | 2011-09-28 | 2016-03-01 | Tdk株式会社 | 蓄電素子、蓄電装置及び回路基板 |
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