WO2016093015A1 - 電極 - Google Patents
電極 Download PDFInfo
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- WO2016093015A1 WO2016093015A1 PCT/JP2015/081973 JP2015081973W WO2016093015A1 WO 2016093015 A1 WO2016093015 A1 WO 2016093015A1 JP 2015081973 W JP2015081973 W JP 2015081973W WO 2016093015 A1 WO2016093015 A1 WO 2016093015A1
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- ptc element
- electrode
- secondary battery
- electrode according
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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
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors
- H01C1/1406—Terminals or electrodes formed on resistive elements having positive temperature coefficient
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors
- H01C1/144—Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors the terminals or tapping points being welded or soldered
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
- H01G11/04—Hybrid capacitors
- H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
- H01G11/14—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors
- H01G11/16—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors against electric overloads, e.g. including fuses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
- 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
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
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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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
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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
- H01M50/543—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
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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
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
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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
- H01M50/543—Terminals
- H01M50/562—Terminals characterised by the material
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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
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/106—PTC
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0082—Organic polymers
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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
Definitions
- the present invention relates to an electrode for flowing a current to or from an electric device, for example, a take-out electrode for a secondary battery, and an electric device having the electrode, for example, a secondary battery.
- lithium ion secondary batteries are widely used in electronic devices, particularly mobile devices.
- lithium ion secondary batteries are liquid electrolytes, they prevent liquid leakage.
- aluminum cans or iron cans having a certain degree of strength are used for the exterior. Accordingly, even if the lithium ion secondary battery is small and light, there is a structural limit that it cannot be made thinner or lighter than a certain degree in order to give strength to the exterior.
- a lithium ion secondary battery uses a hard material for an exterior, there is also a limitation on the shape.
- Lithium ion polymer secondary batteries that do not use liquid as an electrolyte are attracting attention.
- Lithium ion polymer secondary batteries use a non-fluid substance such as gel as an electrolyte. This is because there is no risk of liquid leakage, and an aluminum laminate film can be used as the exterior, so it can be pouch-type, very light, small, and highly flexible.
- a protection element is used in a circuit using the secondary battery.
- a PTC (positive temperature coefficient) element is usually used.
- a PTC element is disposed between the substrate and the electrode of the lithium ion polymer secondary battery. That is, the PTC element is disposed on the substrate, preferably in a state of being integrated with a welding block in advance, and an electrode of a lithium ion polymer secondary battery is connected thereon.
- a PTC element used as a protection element for a secondary battery operates (trips) when it reaches a predetermined temperature, cuts off a current flowing therethrough, and protects a target to be protected.
- the PTC element When protecting the secondary battery from abnormal heat generation, when the secondary battery cell heats abnormally, the heat is transmitted to the PTC element, the temperature of the PTC element rises, the PTC element operates, and the current is cut off. And protect what is to be protected. Further, when protecting a secondary battery or a circuit to which a secondary battery is connected from an overcurrent, the PTC element generates heat due to the overcurrent flowing therethrough, and operates when the temperature reaches a predetermined temperature due to the heat. Protect the objects that should be protected.
- FIG. 4 shows an example of a state in which a conventional secondary battery and a PTC element 38 including a cell 32, an anode 34, and a cathode 36 are electrically connected to a substrate 40.
- the PTC element 38 is disposed on the substrate 40 and connected to the cathode 36 via a welding tab 42.
- the anode 34 is connected to the substrate 40 while being sandwiched between welding tabs 44 for facilitating welding to the substrate.
- an object of the present invention is to provide a protective element that operates quickly when an abnormal heat is generated in a secondary battery cell, interrupts the current, and is hardly affected by other electronic components.
- the present inventors have arranged terminals on both main surfaces or one main surface of the PTC element to serve as a take-out electrode of the secondary battery, and the electrode has a function as a protective element. As a result, the inventors have found that the above problem can be solved, and have reached the present invention.
- an extraction electrode of an electric device A PTC element; A first terminal disposed on one major surface of the PTC element and extending in one direction; An extraction electrode is provided that is disposed on the other major surface of the PTC element and has a first terminal and a second terminal extending in a different direction.
- an extraction electrode of an electrical device A PTC element; A first terminal disposed on a portion of one main surface of the PTC element and extending in one direction; An extraction electrode is provided on the other part of the main surface, the second electrode being spaced apart from the first terminal and having a second terminal extending in a direction different from the first terminal.
- the first terminal and the second terminal are arranged on both main surfaces or one main surface of the PTC element so as to extend in different directions, and these are arranged as the take-out electrode of the secondary battery.
- position a PTC element closer to a secondary battery cell.
- the PTC element since the PTC element can be disposed closer to the secondary battery cell, when the secondary battery cell abnormally generates heat, the PTC element senses the heat more quickly and operates. can do.
- the PTC element exists at a position away from the substrate, it is difficult to be affected by heat generated by other electronic components on the substrate, and a decrease in holding current due to such heat can be suppressed.
- FIG. 1 schematically shows a perspective view of an extraction electrode 1a according to the present invention in one embodiment.
- FIG. 2 schematically shows a side view of the extraction electrode 1a of FIG.
- FIG. 3 schematically shows a perspective view of the secondary battery 11 having the extraction electrode 1a of FIG. 1 in one embodiment connected to a substrate.
- FIG. 4 schematically shows a perspective view of a conventional secondary battery and PTC element connected to a substrate.
- FIG. 5 schematically shows a perspective view of the extraction electrode 1b of the present invention in another embodiment.
- FIG. 6 schematically shows a perspective view of the extraction electrode 1c of the present invention in another embodiment.
- FIG. 7 schematically shows a perspective view of the extraction electrode 1d of the present invention in another embodiment.
- the take-out electrode 1a schematically has a structure as shown in FIGS. Specifically, the extraction electrode 1 a includes a PTC element 2, a first terminal 4, and a second terminal 6. The first terminal 4 and the second terminal 6 are located on the main surface of the PTC element 2 and extend in opposite directions from the PTC element. The first terminal 4 is electrically connected to the internal electrode or current collector of the secondary battery cell, and the second terminal is electrically connected to another electrical element (for example, a substrate). Since the extraction electrode 1a of the present invention has a PTC element, it also has a function as a protective element.
- the PTC element used in the present invention may be either a ceramic PTC element or a polymer PTC element, but it is preferable to use a polymer PTC element.
- the polymer PTC element is advantageous in that it is easy to manufacture, the resistance value of the element itself is low, and self-destruction is unlikely to occur even when the temperature exceeds a certain level, compared to the ceramic PTC element.
- the polymer PTC element can be a well-known one, and generally includes a polymer (for example, polyethylene, polyvinylidene fluoride, etc.) in which a conductive filler (for example, carbon black, nickel alloy, etc.) is dispersed. It is obtained by extruding a conductive composition comprising:
- the PTC element may have a thin layered metal electrode (for example, a foil electrode) on at least one of its main surfaces, preferably both (a so-called PTC element may be used). That is, in one aspect, the extraction electrode of the present invention can further include a layered metal electrode positioned between the main surface of the PTC element and the first terminal or the second terminal disposed above the main surface.
- a thin layered metal electrode for example, a foil electrode
- the material constituting the layered metal electrode is not particularly limited as long as it is a conductive metal, and may be, for example, copper, nickel, aluminum, gold, or an alloy thereof.
- the layered metal electrode is formed by simultaneously extruding the PTC composition constituting the PTC element together with the metal sheet (or metal foil) constituting the layered metal electrode, thereby forming a layered product of the PTC composition between the layered metal electrodes. It can arrange
- the layered metal electrode is obtained by, for example, extruding a layered product of a PTC composition, sandwiching the layered product between metal sheets (or metal foils), and thermocompression bonding them together to form a pressed product. It can also be arranged by obtaining.
- the layered metal electrode may be formed on both main surfaces of the layered product by plating the layered product of the PTC composition with a conductive metal.
- the layered material treated in this way is a state in which a large number of PTC elements are gathered adjacent to each other and have a layered metal electrode layer on both main surfaces.
- a PTC element having a layered metal electrode can be obtained.
- the first terminal 4 is arranged on one main surface of the PTC element 2, and the second terminal 6 is arranged on the other main surface.
- the joining method of the PTC element and each terminal is not particularly limited, and examples thereof include a method using crimping and a conductive adhesive.
- a PTC element (with thin layer metal electrodes on both main surfaces of the PTC element) is used, and the thin layer metal electrode of the PTC element and each terminal are joined by soldering, welding, pressure bonding, or conductive adhesive. May be.
- a clad material or a partial clad material may be used at each terminal, and a joint portion of each terminal with the PTC element (PTC element) may be plated.
- the shape of the first terminal 4 and the second terminal 6 is not particularly limited as long as it can function as an extraction electrode, and may be, for example, a rod shape or a strip shape. Moreover, the shape of the 1st terminal 4 and the 2nd terminal 6 may be the same, or may differ.
- the first terminal 4 and the second terminal 6 have extending portions 8 and 10 extending outward from the main surface of the PTC element, respectively, as shown.
- the extending portions 8 and 10 of the first terminal 4 and the second terminal 6 respectively extend in opposite directions (directions forming 180 °) from the main surface of the PTC element.
- the present invention is not limited to such an embodiment, and may extend in any direction as long as the first terminal 4 can be connected to the secondary battery cell and the second terminal can be connected to another electrical element.
- the first terminal and the second terminal may be arranged so as to form 90 ° (at right angles).
- the second terminal may extend not only in one direction but also in two or three directions.
- the first terminal 4 and the second terminal 6 are preferably arranged so as to match the shape of the main surface of the PTC element and cover the entire main surface except for the extending portion 8.
- each terminal may be arranged so as to cover only a part of the main surface of the PTC element.
- Each terminal may be arranged so as to protrude from the main surface of the PTC element, that is, slightly extend in any direction.
- the thickness of the first terminal 4 and the second terminal 6 is not particularly limited, but is, for example, 0.05 mm to 3.0 mm, preferably 0.07 to 0.30 mm, more preferably 0.10 to 0.15 mm. There may be. Further, the thicknesses of the first terminal and the second terminal may be the same or different. Moreover, the thickness of each terminal does not necessarily need to be uniform and may be different.
- the length of the first terminal may be 10 to 200 mm, preferably 20 to 140 mm, more preferably 30 to 80 mm.
- the length of the second terminal may be 5 to 100 mm, preferably 7 to 50 mm, more preferably 10 to 30 mm.
- the length of the first terminal 4 and the second terminal 6 is not particularly limited.
- the length of the first terminal can be appropriately selected according to the size and type of the secondary battery in which the extraction electrode of the present invention is disposed, the distance between the PTC element and the secondary battery cell, etc.
- the length of the terminal can be appropriately selected according to the size and shape of another electric element (for example, a substrate), the distance between the PTC element and the other electric element, and the like.
- the materials constituting the first terminal 4 and the second terminal 6 may be the same or different.
- the material constituting the first terminal 4 and the second terminal 6 is not particularly limited as long as it is a conductive material.
- a conductive metal material specifically nickel, aluminum, stainless steel, iron, copper, tin, Titanium or an alloy of these metals can be mentioned.
- the first terminal 4 and the second terminal 6 may each be formed of only one kind of metal or a plurality of metals.
- the first terminal and the second terminal may have a multilayer structure in which two or more metal layers are bonded together.
- the first terminal and the second terminal may be so-called clad materials and may have a plating layer on the surface.
- a multilayer structure may exist in the whole of each terminal, and may exist in only one part.
- the first terminal 4 is made of the same material as that of the internal electrode or current collector of the secondary battery cell.
- the material constituting the first terminal 4 may be aluminum.
- the take-out electrode 1 a and the internal electrode Alternatively, electrical connection with the current collector is facilitated.
- the material which comprises the 1st terminal 4 may be nickel. By using nickel as the material constituting the first terminal 4, when the electrode of the present invention is used as the negative electrode, electrical connection between the electrode and the internal electrode or current collector of the secondary battery cell is facilitated. .
- the material of the second terminal 6 is the same material as the material of the connection portion with the secondary battery of another electrical element.
- the material constituting the second terminal 6 is another extraction electrode (that is, when the extraction electrode of the present invention is used as an anode, the extraction electrode of the cathode, and the extraction electrode of the present invention is used as the cathode). In this case, it may be the same material as that of the anode extraction electrode).
- the other extraction electrode is made of nickel
- the second terminal 6 of the extraction electrode 1a of the present invention is made of nickel.
- the materials of the second terminal and other extraction electrodes are same in this way, when the anode and cathode extraction electrodes are connected to other electrical elements such as a substrate, connection to the other electrical elements is facilitated.
- the other electrical element is a printed circuit board
- the surface of the connection portion (for example, pad) of the extraction electrode is usually made of a kind of metal. That is, when the materials are different between the anode and the cathode of the secondary battery, at least one of the materials is different from the material of the connection portion of the substrate, and connection between different metals is necessary.
- the connection between the anode and the substrate is a connection between different metals, so welding
- the connection between the anode and the substrate is a connection between different metals, so welding
- the extraction electrode of the present invention can use different materials for the first terminal 4 and the second terminal 6, the first terminal 4 uses a material corresponding to the secondary battery cell, and the second terminal 6 is advantageous in that a material corresponding to the substrate can be used.
- the take-out electrode 1a of the present invention is a lithium ion polymer secondary battery, particularly a lithium ion polymer secondary battery in which the anode internal electrode or current collector is aluminum and the cathode internal electrode or current collector is nickel. It is suitably used as an extraction electrode.
- take-out electrode 1a of the present invention is suitably used in a pouch-type secondary battery that requires a take-out electrode for both the anode and the cathode.
- the present invention also provides a secondary battery comprising the extraction electrode of the present invention.
- the secondary battery of the present invention is not particularly limited, and may be a lithium ion polymer secondary battery, a lithium ion secondary battery, an alkaline secondary battery, or the like, and is preferably a lithium ion polymer secondary battery.
- FIG. 3 shows a state in which the lithium ion polymer secondary battery 11 (hereinafter, simply referred to as “secondary battery 11”) according to one embodiment of the present invention is electrically connected to the substrate 12.
- the lithium ion polymer secondary battery 11 of the present invention comprises a cell 14, an extraction electrode 1 a of the present invention as an anode, and a cathode 16.
- a plurality of secondary battery cells are stacked inside the secondary battery pack.
- the first terminal 4 of the extraction electrode 1 a is electrically connected to the internal electrode or current collector of the secondary battery cell inside the cell 14.
- the second terminal 6 of the extraction electrode 1a is electrically connected to the substrate 12 via the welding tab 18 (note that wiring on the substrate is omitted).
- the secondary battery 11 of the present invention has the above-described extraction electrode 1a of the present invention as an extraction electrode for the anode.
- the internal electrode and current collector of the secondary battery cell are preferably composed of a material mainly composed of aluminum.
- the connection portion between the extraction electrode and the anode current collector is made of aluminum.
- the entire extraction electrode is made of aluminum as in the prior art (for example, the embodiment shown in FIG. 4), it is difficult to connect to other electrical elements such as a substrate whose connection point is other than aluminum because it is a connection between different metals. It may become.
- connection portion that is, the first terminal
- the internal electrode or current collector of the secondary battery cell is made of aluminum
- connection with the electrical element ie, the second terminal
- the connection with the electrical element can be made of another material (for example, nickel) suitable for connection with another electrical element. That is, both the connection with the secondary battery cell and the connection with other electric elements can be facilitated.
- the take-out electrode 1a of the present invention is preferably arranged so that the PTC element 2 is as close to the cell 14 as possible, preferably in contact with it. That is, the length of the extending portion of the first terminal 4 of the extraction electrode 1a is substantially the same as or slightly the length from the connecting portion between the first terminal and the current collector to the portion where the first terminal is exposed from the cell. It is preferable that the length is very long.
- the PTC element When the PTC element is positioned closer to the cell, when the secondary battery cell abnormally generates heat, the heat can be detected and operated more quickly.
- the present invention is not limited to this embodiment.
- the PTC element 2 may be located near or on the substrate.
- the extraction electrode since the extraction electrode has the PTC element, the secondary battery itself has a protection function against overcurrent and abnormal heat generation, and the PTC element is disposed at a position close to the secondary battery cell. Therefore, a good protective function can be exhibited especially against abnormal heat generation. Furthermore, since the material of the 2nd terminal of an extraction electrode can be set arbitrarily, the connection to another electronic element becomes easy.
- the electrode of the present invention is manufactured by connecting the first terminal to one main surface of the PTC element and electrically connecting the second terminal to the other main surface.
- the connection method between the main surface of the PTC element and the first terminal or the second terminal is not particularly limited as long as they can be electrically and mechanically connected.
- each terminal and the PTC element are bonded by thermocompression bonding.
- a so-called PTC element having thin layer metal electrodes on both main surfaces of the PTC element is used, and the layered metal electrode of the PTC element and the first terminal or the second terminal are connected to a solder material, a conductive adhesive, You may connect using connection materials, such as an electrically conductive paste and a silver brazing material, or you may connect both by welding.
- connection materials such as an electrically conductive paste and a silver brazing material, or you may connect both by welding.
- the connection between the main surface of the PTC element and the first terminal and the second terminal may be performed simultaneously or sequentially.
- the electrode of the present invention and the secondary battery including the electrode have been described above. However, the present invention is not limited to this, and various modifications can be made. It can also be used as a device electrode.
- the extraction electrode 1b according to the second embodiment is shown in FIG.
- the second terminal 6 extends from the PTC element 2 in a direction substantially perpendicular to the first terminal 4.
- the angle formed by the first terminal 4 and the second terminal 6 is substantially a right angle, that is, does not need to be completely a right angle, for example, 75 to 105 °, preferably 80 to 100 °, more preferably 85 to 95 °.
- the electrode 1b may have the same configuration as that of the first embodiment except for the extending direction of the second terminal.
- a take-out electrode 1c according to the third embodiment is shown in FIG.
- the second terminal 6 extends from the PTC element 2 in two directions.
- the second terminal 6 extending in each direction extends in a direction substantially perpendicular to the first terminal 4.
- the angle formed between the second terminal 6 extending in each direction and the first terminal 4 is substantially a right angle, that is, does not need to be completely a right angle, for example, 75 to 105 °, preferably 80 to 100 °. More preferably, it may be 85 to 95 °.
- the electrode 1c may have the same configuration as that of the first embodiment described above except for the extending direction of the second terminal. In the present embodiment, the two extending portions of the second terminal extend at right angles to the first terminal.
- the present invention is not limited to this, and each extends in an arbitrary direction. It may be.
- the extending directions of the second terminals are opposite to each other, but are not limited to this, and may extend in any direction.
- one of the extension portions of the second terminal extends at a right angle to the first terminal, and the other extension portion extends in the opposite direction (direction forming 180 °) with respect to the first terminal. May be present. That is, the second terminal may not be linear but may be bent, or in the above case, may be bent at a right angle.
- the extraction electrode 1d is A PTC element; A first terminal disposed on a portion of one main surface of the PTC element and extending in one direction; The other part on the main surface has a second terminal which is arranged to be separated from the first terminal and extends in a direction different from the first terminal.
- the electrode 1d may have a configuration similar to that of the first embodiment described above, except that both the first terminal and the second terminal are present on the same main surface of the PTC element.
- the 2nd terminal may extend like the above-mentioned 2nd and 3rd embodiment.
- the PTC element 2 has a layered metal electrode on the main surface to which the first and second terminals are connected, the layered metal electrode between the first terminal 4 and the PTC element 2, Note that the layered metal electrode between the two terminals 6 and the PTC element 2 is spaced apart.
- the extraction electrode of the present invention can be suitably used as an extraction electrode for various secondary batteries.
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Abstract
Description
PTC要素と、
PTC要素の一方の主表面上に配置され、一の方向に延在した第1ターミナルと、
PTC要素の他の主表面上に配置され、第1ターミナルと別の方向に延在した第2ターミナルと
を有して成る取り出し電極が提供される。
PTC要素と、
PTC要素の一方の主表面上の一部に配置され、一の方向に延在した第1ターミナルと、
上記主表面上の他の一部に、第1ターミナルと離隔するように配置され、第1ターミナルとは別の方向に延在した第2ターミナルと
を有して成る取り出し電極が提供される。
PTC要素と、
PTC要素の一方の主表面上の一部に配置され、一の方向に延在した第1ターミナルと、
上記主表面上の他の一部に、第1ターミナルと離隔するように配置され、第1ターミナルとは別の方向に延在した第2ターミナルと
を有して成る。電極1dは、第1ターミナルおよび第2ターミナルの両方が、PTC要素の同じ主表面上に存在すること以外は、上記した第1の実施形態と同様の構成を有し得る。また、上記した第2および第3の実施形態と同様に、第2ターミナルが延在していてもよい。尚、この態様において、PTC要素2が、第1および第2ターミナルが接続される主表面上に層状金属電極を有する場合、第1ターミナル4とPTC要素2の間にある層状金属電極と、第2ターミナル6とPTC要素2の間にある層状金属電極とは、離隔されることに注意されたい。
4…第1ターミナル; 6…第2ターミナル;
8…第1ターミナルの延在部; 10…第2ターミナルの延在部;
11…リチウムイオンポリマー二次電池; 12…基板;
14…セル; 16…陰極; 18…溶接タブ; 32…セル;
34…陰極; 36…陽極; 38…PTC素子; 40…基板;
42…溶接タブ; 44…溶接タブ
Claims (22)
- 電気装置の電極であって、
PTC要素と、
PTC要素の一方の主表面上に配置され、一の方向に延在した第1ターミナルと、
PTC要素の他の主表面上に配置され、第1ターミナルとは別の方向に延在した第2ターミナルと
を有して成る電極。 - 第2ターミナルが、PTC要素を基準に、第1ターミナルと逆方向に延在していることを特徴とする、請求項1に記載の電極。
- 第2ターミナルが、PTC要素を基準に、第1ターミナルと略直角をなす方向に延在していることを特徴とする、請求項1に記載の電極。
- 第2ターミナルが、PTC要素から2方向に延在していることを特徴とする、請求項1に記載の電極。
- 第2ターミナルが、PTC要素から2方向に延在し、各方向に延在した第2ターミナルが、それぞれ、第1ターミナルと略直角をなす方向に延在していることを特徴とする、請求項4に記載の電極。
- 電気装置の電極であって、
PTC要素と、
PTC要素の一方の主表面上の一部に配置され、一の方向に延在した第1ターミナルと、
上記主表面上の他の一部に、第1ターミナルと離隔するように配置され、第1ターミナルとは別の方向に延在した第2ターミナルと
を有して成る電極。 - 第2ターミナルが、PTC要素を基準に、第1ターミナルと逆方向に延在していることを特徴とする、請求項6に記載の電極。
- 第2ターミナルが、PTC要素を基準に、第1ターミナルと略直角をなす方向に延在していることを特徴とする、請求項6に記載の電極。
- 第2ターミナルが、PTC要素から2方向に延在していることを特徴とする、請求項6に記載の電極。
- 第2ターミナルが、PTC要素から2方向に延在し、各方向に延在した第2ターミナルが、それぞれ、第1ターミナルと略直角をなす方向に延在していることを特徴とする、請求項9に記載の電極。
- 二次電池の取り出し電極である、請求項1~10のいずれかに記載の電極。
- さらに、PTC要素の主表面と、その上に配置された第1ターミナルまたは第2ターミナルの間に位置する層状金属電極を有することを特徴とする、請求項1~11のいずれかに記載の電極。
- 第1ターミナルがアルミニウムから形成されることを特徴とする、請求項1~12のいずれかに記載の電極。
- 第1ターミナルがアルミニウムから形成され、第2ターミナルがニッケルから形成されることを特徴とする、請求項1~13のいずれかに記載の電極。
- 二次電池の陽極として用いられることを特徴とする、請求項1~14のいずれかに記載の電極。
- 二次電池が、リチウムイオンポリマー二次電池であることを特徴とする、請求項15に記載の電極。
- 二次電池がパウチ型であることを特徴とする、請求項15または16に記載の電極。
- 請求項1~17のいずれかに記載の電極を有して成る二次電池。
- リチウムイオンポリマー二次電池である請求項18に記載の二次電池。
- 請求項1~17のいずれかに記載の電極が、二次電池の陽極として用いられていることを特徴とする、請求項18または19に記載の二次電池。
- 第1ターミナルがアルミニウムから形成され、第2ターミナルがニッケルから形成される、請求項1~17のいずれかに記載の電極が陽極として用いられ、ニッケルから形成される別の電極が陰極として用いられていることを特徴とする、請求項18~20のいずれかに記載の二次電池。
- 請求項1~17のいずれかに記載の電極の製造方法であって、PTC要素の主表面に、第1ターミナルおよび第2ターミナルを、順次または同時に電気的かつ機械的に接続することを特徴とする方法。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201580061465.0A CN107004824A (zh) | 2014-12-08 | 2015-11-13 | 电极 |
| US15/528,950 US20170279107A1 (en) | 2014-12-08 | 2015-11-13 | Electrode |
| KR1020177013478A KR20170068593A (ko) | 2014-12-08 | 2015-11-13 | 전극 |
| EP15867779.9A EP3232496A4 (en) | 2014-12-08 | 2015-11-13 | Electrode |
| JP2016563580A JPWO2016093015A1 (ja) | 2014-12-08 | 2015-11-13 | 電極 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014247959 | 2014-12-08 | ||
| JP2014-247959 | 2014-12-08 | ||
| JP2015100894 | 2015-05-18 | ||
| JP2015-100894 | 2015-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016093015A1 true WO2016093015A1 (ja) | 2016-06-16 |
Family
ID=56107209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2015/081973 Ceased WO2016093015A1 (ja) | 2014-12-08 | 2015-11-13 | 電極 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20170279107A1 (ja) |
| EP (1) | EP3232496A4 (ja) |
| JP (1) | JPWO2016093015A1 (ja) |
| KR (1) | KR20170068593A (ja) |
| CN (1) | CN107004824A (ja) |
| TW (1) | TW201622213A (ja) |
| WO (1) | WO2016093015A1 (ja) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102601624B1 (ko) | 2018-06-20 | 2023-11-10 | 주식회사 엘지에너지솔루션 | 개선된 전극 탭들 사이의 연결 구조를 갖는 전극 조립체 |
| JP7469093B2 (ja) * | 2020-03-25 | 2024-04-16 | 本田技研工業株式会社 | リチウムイオン二次電池 |
| CN112968256A (zh) * | 2021-02-03 | 2021-06-15 | 东莞新能安科技有限公司 | 电化学装置和电子装置 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61149306U (ja) * | 1985-03-05 | 1986-09-16 | ||
| JP2005129442A (ja) * | 2003-10-27 | 2005-05-19 | Sony Corp | 二次電池および電池パック |
| JP2005527100A (ja) * | 2001-08-06 | 2005-09-08 | タイコ・エレクトロニクス・コーポレイション | 回路保護デバイス |
| JP2006114475A (ja) * | 2004-10-18 | 2006-04-27 | Samsung Sdi Co Ltd | 放熱層が形成された電池外装材及びこれを用いるリチウムポリマー電池 |
| JP2007533099A (ja) * | 2004-04-13 | 2007-11-15 | エルジー・ケム・リミテッド | 保護素子を内蔵した電極リードを有する電気化学素子 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100477752B1 (ko) * | 2002-12-26 | 2005-03-21 | 삼성에스디아이 주식회사 | 보호소자 및 이를 구비한 리튬 이차 전지 |
| CN201084774Y (zh) * | 2007-08-31 | 2008-07-09 | 比亚迪股份有限公司 | 一种电池保护结构 |
| US9065085B2 (en) * | 2011-04-19 | 2015-06-23 | Samsung Sdi Co., Ltd. | Battery pack |
-
2015
- 2015-11-13 US US15/528,950 patent/US20170279107A1/en not_active Abandoned
- 2015-11-13 WO PCT/JP2015/081973 patent/WO2016093015A1/ja not_active Ceased
- 2015-11-13 EP EP15867779.9A patent/EP3232496A4/en not_active Withdrawn
- 2015-11-13 CN CN201580061465.0A patent/CN107004824A/zh active Pending
- 2015-11-13 KR KR1020177013478A patent/KR20170068593A/ko not_active Abandoned
- 2015-11-13 JP JP2016563580A patent/JPWO2016093015A1/ja not_active Withdrawn
- 2015-11-30 TW TW104139884A patent/TW201622213A/zh unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61149306U (ja) * | 1985-03-05 | 1986-09-16 | ||
| JP2005527100A (ja) * | 2001-08-06 | 2005-09-08 | タイコ・エレクトロニクス・コーポレイション | 回路保護デバイス |
| JP2005129442A (ja) * | 2003-10-27 | 2005-05-19 | Sony Corp | 二次電池および電池パック |
| JP2007533099A (ja) * | 2004-04-13 | 2007-11-15 | エルジー・ケム・リミテッド | 保護素子を内蔵した電極リードを有する電気化学素子 |
| JP2006114475A (ja) * | 2004-10-18 | 2006-04-27 | Samsung Sdi Co Ltd | 放熱層が形成された電池外装材及びこれを用いるリチウムポリマー電池 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP3232496A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2016093015A1 (ja) | 2017-09-14 |
| TW201622213A (zh) | 2016-06-16 |
| EP3232496A1 (en) | 2017-10-18 |
| US20170279107A1 (en) | 2017-09-28 |
| KR20170068593A (ko) | 2017-06-19 |
| CN107004824A (zh) | 2017-08-01 |
| EP3232496A4 (en) | 2018-06-27 |
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