WO2016147967A1 - Pile rechargeable - Google Patents

Pile rechargeable Download PDF

Info

Publication number
WO2016147967A1
WO2016147967A1 PCT/JP2016/057267 JP2016057267W WO2016147967A1 WO 2016147967 A1 WO2016147967 A1 WO 2016147967A1 JP 2016057267 W JP2016057267 W JP 2016057267W WO 2016147967 A1 WO2016147967 A1 WO 2016147967A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery container
battery
flat plate
opening
secondary battery
Prior art date
Application number
PCT/JP2016/057267
Other languages
English (en)
Japanese (ja)
Inventor
山田　直毅
木舩　素成
英毅 篠原
Original Assignee
日立オートモティブシステムズ株式会社
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 日立オートモティブシステムズ株式会社 filed Critical 日立オートモティブシステムズ株式会社
Publication of WO2016147967A1 publication Critical patent/WO2016147967A1/fr

Links

Images

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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • 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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • 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 the structure of a lithium ion secondary battery used as a power source for automobiles, for example.
  • lithium ion secondary batteries have been used as power sources for electric vehicles and hybrid vehicles.
  • Lithium ion secondary batteries for automobiles are required to have high output, high energy density, and long life.
  • the required capacity is much larger than secondary batteries used in personal computers and portable devices.
  • Patent Document 1 proposes a structure having a lid having terminal parts.
  • Patent Document 1 the exterior material is fixed over the entire surface with respect to the side surface of the lid. Therefore, since the flexible resin layer covers the surface except for the upper surface which is the exposed portion of the cover plate, the dimensional accuracy is lowered and it is difficult to use the holder.
  • lithium ion secondary batteries for automobiles need to determine their position by engaging with surrounding parts to cope with vibration and acceleration during driving.
  • the exterior material covers the entire side surface of the lid plate.
  • the fixed secondary battery there is no part that can ensure dimensional accuracy other than one side of the cover plate located outside the secondary battery, it is difficult to use the holder, and it can cope with the vibration and acceleration. Is difficult.
  • the present invention solves the above-mentioned conventional problems.
  • the position of a lithium-ion secondary battery for automobiles is determined by engaging with peripheral parts, etc., and it is easy to deal with vibration and acceleration during driving. It aims at providing the means to do.
  • the secondary battery of the present invention is a secondary battery having a battery container constituted by a film-shaped package and a lid plate for hermetically sealing the opening of the battery container.
  • the battery container has an opening edge of the opening of the battery container fixed to a side surface of the lid plate, and the lid plate has an exposed portion exposed from the battery container on a side surface of the lid plate. It is characterized by having.
  • the position in the direction along the surface of the cover plate can be determined by contact or engagement with peripheral components. Therefore, for example, when mounted on an automobile, it is possible to provide a secondary battery that can easily cope with vibration and acceleration during traveling. Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.
  • FIG. 1 is an external perspective view of a secondary battery according to a first embodiment of the present invention.
  • the disassembled perspective view of the secondary battery shown in FIG. The figure explaining the structure of a cover plate.
  • the figure explaining the other structural example of a battery container The figure explaining the other structural example of a battery container.
  • the figure explaining the structure of a cover plate The figure explaining an example of the fixing structure of a battery container.
  • the figure explaining other examples of the fixation structure of a battery container The figure explaining other examples of the fixation structure of a battery container.
  • FIG. 1 is an external perspective view of the secondary battery in the present embodiment
  • FIG. 2 is an exploded perspective view of the secondary battery shown in FIG.
  • FIG. 3 is a diagram for explaining the configuration of the lid plate
  • FIG. 3 (a) is a front view schematically showing the structure of the lid plate
  • FIG. 3 (b) is a bottom view.
  • FIG. 4 is a figure explaining the fixing structure to the cover plate of a film-form package body.
  • the secondary battery 1 is a lithium ion secondary battery, and includes a battery container 2 that houses a wound body 4 that is a power generation element, and a lid plate 3 that closes and seals the opening 2D of the battery container 2. .
  • the battery container 2 is configured by a film-shaped package, and the cover plate 3 is configured by a metal plate-shaped member having a predetermined plate thickness.
  • the wound body 4 is supported on the cover plate 3 by the positive electrode side terminal component 5 and the negative electrode terminal component 6.
  • the film-like package 21 constituting the battery container 2 preferably has a laminated structure of a metal film and a resin film, or a laminated structure in which a resin layer is formed on the metal film. 4, a laminate material having a laminated structure in which resin layers 23 are formed on both surfaces of a metal film 22 is used.
  • the material of the metal film 22 is preferably SUS or aluminum.
  • the battery container 2 has a bottomed box shape capable of storing an electrolytic solution.
  • the battery case 2 includes a bottom surface 2A having a long side and a short side, a pair of wide side surfaces 2B and 2B that stand up from the long side that is spaced apart from the bottom surface 2A, and a pair that stands up from the short side that is spaced from the bottom surface 2A. 2C and 2C, and a rectangular opening 2D that opens upward is formed at the top.
  • the battery container 2 using the film-shaped package 21 can be obtained, for example, by forming a single film-like member into a flat rectangular box shape with one surface opened by bending and welding or welding, or between Of the edge portions of the two film-shaped packages formed in such a manner that the power generation element can be sandwiched between them, the portions located other than the opening can be welded together.
  • the laminated resin layer 23 is heated to a melting point or higher and welded.
  • Thermal welding is suitable. In the welding of aluminum, sufficient melting is difficult due to the thermal conductivity of aluminum, and there is a possibility that a uniform weld portion cannot be obtained and the hermeticity is lowered.
  • the material is suitable for welding. It is also possible to weld metal films by a technique such as laser welding or resistance welding. Thus, by metal-to-metal welding, the airtightness is high and it is possible to easily suppress the penetration of moisture and the like from the outside. As a welding method, laser welding is preferable from the viewpoint of position accuracy and workability.
  • the lid plate 3 is welded to the battery case 2 and hermetically seals the opening 2D of the battery case 2.
  • the lid plate 3 is made of a metal material, and is preferably a SUS material or aluminum.
  • a film-like package 21 in which a SUS thin film is applied to a metal film is used for the battery container 2, the battery container 2 and The weldability of the battery is improved, and the sealing performance of the battery is increased.
  • the cover plate 3 includes a flat plate portion 10 having a certain thickness and ribs 11 provided so as to protrude from the lower surface of the flat plate portion 10.
  • the flat plate portion 10 has a rectangular shape larger than the opening 2D of the battery case 2.
  • the rib 11 constitutes a welded portion to which the battery case 2 is welded, and is continuously formed in a circumferential shape along the outer edge of the flat plate portion 10 as shown in FIG. Yes.
  • the cover plate 3 has a side surface 10 a of the flat plate portion 10 and a rib outer surface 11 a of the rib 11 as side surfaces.
  • the rib 11 is provided at a position that is inward of the outer end edge portion of the flat plate portion 10 and at a position that is larger than the thickness of the film-shaped package 21 between the outer end edge portion of the flat plate portion 10. ing.
  • the rib 11 is inserted into the battery container 2 from the opening 2D of the battery container 2, and the rib outer surface 11a has a size facing the inner wall surface of the battery container 2 over a predetermined height.
  • the rib 11 of the cover plate 3 is inserted into the battery container 2 from the opening 2D of the battery container 2, and the opening end of the opening 2D of the battery container 2 is ribbed. It is made to oppose the outer surface 11a.
  • the laser beam of laser welding is irradiated toward the opening edge part from the outer side of the battery container 2.
  • FIG. The laser beam is continuously irradiated over the entire circumference along the opening end of the battery case 2.
  • the battery container 2 is fixed by hermetically sealing the opening end of the opening 2D of the battery container 2 by being welded to the rib outer surface 11a of the rib 11 of the cover plate 3 by laser beam irradiation.
  • a broken line WL shown in FIG. 1 schematically shows a welding mark by laser welding.
  • the resin layer 23 where the laser beam of the film-shaped package 21 is irradiated by laser welding is evaporated, and the metal film 22 of the film-shaped package 21 is covered with the cover plate 3 as shown in FIG. 4. It is welded to the rib 11.
  • the cover plate 3 is exposed to the outside without being covered with the battery container 2 while the rib outer surface 11a of the rib 11 is covered with the battery container 2 among the side faces. Yes. That is, the side surface 10a of the flat plate portion 10 constitutes an exposed portion where at least a part of the side surface of the cover plate 3 is exposed to the outside.
  • a side surface 10a of the flat plate portion 10 which is an exposed portion of the cover plate 3 serves as a reference point for lateral positioning of the lithium ion secondary battery 1 which is a direction along the lower surface 10b of the flat plate portion 10, and is made of metal.
  • the cover plate 3 can be used for fixing. Therefore, the lithium ion secondary battery 1 can be positioned at a desired position, and the battery can be easily held.
  • the flexibility and smoothness of the resin layer 23 constituting the film-shaped package 21 are the main causes.
  • the positioning accuracy of the lithium ion secondary battery is lowered, and the lithium ion secondary battery cannot be sufficiently fixed, and as a result, it may be difficult to hold.
  • the welded portion does not have a uniform shape after welding and forms irregular irregular surfaces, so that it cannot be used as a reference surface for positioning and is difficult to reliably hold.
  • the battery case 2 is fixed to the rib 11 of the cover plate 3, and the side surface 10a of the flat plate portion 10 of the cover plate 3 is not covered with the battery case 2, but is exposed to the outside as an exposed portion. Therefore, the side surface 10a can be brought into contact with or sandwiched with another member, and can be used as a reference surface for positioning the lithium ion secondary battery 1.
  • the flat plate portion 10 of the cover plate 3 has a constant shape of the side surface 10a and can improve the positioning accuracy of the lithium ion secondary battery 1 in the lateral direction.
  • the rib 11 is located at a position where the rib 11 enters the inner side of the outer end edge of the flat plate portion 10, and the gap between the rib 11 and the outer end edge of the flat plate portion 10 is larger than the thickness of the film-shaped package 21. Therefore, when the battery case 2 is fixed to the cover plate 3, the side surface 10 a of the flat plate portion 10 is arranged at a position protruding laterally from the battery case 2. Therefore, the side surface 10a can be easily brought into contact with another member, or the flat plate portion 10 can be sandwiched and held.
  • the cover plate 3 includes a positive electrode side terminal component 5 electrically connected to the positive electrode 34 of the wound body 4 and a negative electrode side terminal component 6 electrically connected to the negative electrode 32 of the wound body 4. Yes.
  • the positive electrode side terminal component 5 includes a positive electrode external terminal 51, a positive electrode connection terminal 52, a gasket (not shown) disposed inside the battery container 2, and a positive electrode current collector 53.
  • the positive external terminal 51, the positive connection terminal 52, the gasket and the positive current collector 53 are fixed integrally and attached to the lid plate 3. In this state, the positive electrode current collector 53, the positive electrode connection terminal 52, and the positive electrode external terminal 51 are electrically connected.
  • the positive electrode current collector 53, the positive electrode connection terminal 52, and the positive electrode external terminal 51 are insulated from the cover plate 3 by a positive electrode side external insulator (not shown) and a gasket.
  • the negative electrode side terminal component 6 includes a negative electrode external terminal 61, a negative electrode connection terminal 62, a gasket (not shown) disposed inside the battery container 2, and a negative electrode current collector 63.
  • the negative electrode side terminal component 6 has the same structure as the positive electrode terminal component 5, and the negative electrode external terminal 61, the negative electrode connection terminal 62, and the negative electrode current collector 63 are integrally fixed and attached to the lid plate 3. ing. In this state, the negative electrode current collector 63, the negative electrode connection terminal 62, and the negative electrode external terminal 61 are electrically connected.
  • the negative electrode current collector 63 and the negative electrode external terminal 61 are insulated from the cover plate 3 by a negative electrode side external insulator (not shown) and a gasket.
  • the positive external terminal 51 and the negative external terminal 61 protrude outside the cover plate 3 and have a screw structure. Therefore, when connecting the battery to an external circuit, the positive electrode external terminal 51 or the negative electrode external terminal 61 is inserted into a bus bar (not shown) provided with a hole or notch, and assembled with a nut. Thereby, a battery and an external circuit are electrically connected.
  • the cover plate 3 is provided with a gas discharge valve 71 as a safety valve.
  • the gas discharge valve 71 is formed by partially thinning the cover plate 3 by press working. Note that a thin film member may be attached to the opening of the cover plate 3 by laser welding or the like, and the thin portion may be used as a gas discharge valve.
  • the gas discharge valve 71 generates heat when the prismatic secondary battery 1 generates heat due to an abnormality such as overcharge, and the gas discharge valve 71 is cleaved when the pressure in the battery container increases and reaches a predetermined pressure. By discharging, the pressure in the battery container is reduced.
  • the lid plate 3 is provided with a liquid injection hole 72 for injecting an electrolytic solution into the battery container.
  • the liquid injection hole 72 is sealed by a liquid injection plug 73 after injecting the electrolytic solution.
  • the electrolytic solution for example, a non-aqueous electrolytic solution in which a lithium salt such as lithium hexafluorophosphate (LiPF 6 ) is dissolved in a carbonate-based organic solvent such as ethylene carbonate can be used.
  • FIG. 5 is a perspective view showing the basic configuration of the wound body 4, and shows a state where the winding end is disassembled.
  • the wound body 4 is produced by winding the positive electrode 34 and the negative electrode 32 with the separators 33 and 35 being stacked therebetween.
  • the positive electrode 34 and the negative electrode 32 are each composed of a positive electrode coated portion 34a and a positive electrode uncoated portion 34b in which a mixture layer is formed, and similarly, a negative electrode coated portion 32a and a negative electrode uncoated portion 32b.
  • the portion where charging / discharging occurs due to insertion / extraction of lithium ions is performed, and the uncoated portion is a portion that mediates input / output of current to the battery by contacting or welding with an external terminal.
  • FIG. 6 is an exploded perspective view illustrating a method of holding the secondary battery according to the present invention to the holder
  • FIG. 7 is a cross-sectional view illustrating a state of holding the secondary battery according to the present invention to the holder
  • FIG. It is the B section enlarged view of FIG.
  • a box-shaped battery can formed by subjecting a metal plate to a deep drawing process has been suitably used for lithium ion secondary batteries for automobiles in particular. This is because the use of a battery can increases the strength of the battery container and provides excellent dimensional accuracy when installing and fixing a jig around the periphery.
  • the thickness of the can wall is limited to about 0.5 mm, and it is difficult to make it thinner.
  • the reason why it is difficult to make the film thinner is that, in the method by deforming the metal plate, there are a mixture of a part that tends to be thin in the manufacturing process and a part that tends to keep the original thickness relatively. Therefore, it is mentioned that the whole battery can has thickness variation.
  • Such a variation in the thickness of the can wall causes, for example, a bias in the pressure resistance of the battery container, and when the internal pressure of the battery rises, it ruptures from a specific part, and the contents erupt.
  • the possibility of developing into a state increases.
  • an additional process such as a rust prevention process is performed, the possibility that the thin part is physically broken increases, which may contribute to a decrease in yield.
  • the film-shaped packaging body 21 is previously formed into a thin film shape, when the box-shaped battery container 2 is produced using the film-shaped packaging body 21, the thickness variation of the box wall shall be extremely small. Can do. If the film-shaped package 21 can ensure the strength of the joint portion, the pressure resistance is less biased. Therefore, by providing a mechanism such as the gas discharge valve 71 for relieving the pressure at a specific part such as the cover plate 3, the battery container 2 with higher safety can be obtained.
  • the film-shaped package 21 is generally very flexible in terms of its structure, and there is a concern that the battery internal pressure tends to expand compared to the can structure obtained by the above-described deep drawing method.
  • a holder having a function of providing pressure resistance in addition to holding the lithium ion secondary battery 1 around the position where the lithium ion secondary battery 1 is installed. 7 is installed and the lithium ion secondary battery 1 is held, so that measures can be easily taken.
  • the holder 7 is made of a resin material such as reinforced plastic, and has a box shape that can accommodate the battery container 2.
  • the holder 7 has an inner wall surface 7a that is opposed to the battery container 2 with a predetermined gap, and suppresses expansion of the battery container 2 by bringing the battery container 2 into contact with the inner wall surface 7a. be able to.
  • the stepped portion 7b contacts the lower surface 10b of the flat plate portion 10 by placing the lid plate 3, and performs positioning of the lithium ion secondary battery 1 in the thickness direction of the flat plate portion 10 in the height direction.
  • the lateral positioning of the lithium ion secondary battery 1, which is in contact with the side surface 10 a of the flat plate portion 10 and is along the lower surface 10 b of the flat plate portion 10 is performed.
  • the lithium ion secondary battery 1 can be fixed to the holder 7 by inserting a screw through the through hole 8 formed in the flat plate portion 10.
  • the holder 7 suppresses the expansion of the battery container 2 made of the film-shaped package 21, thereby suppressing deformation of the lithium ion secondary battery 1 due to fluctuations in the battery internal pressure during use and designing the battery internal pressure when abnormal.
  • a pressure-sensitive current cutoff valve (not shown) installed on the lid plate 3 cuts off the current and stops the use of the battery.
  • the gas discharge valve 71 installed on the lid plate 3 is similarly ruptured and opened by the pressure, and measures such as preventing the battery itself from being ruptured by releasing the pressure can be taken.
  • secondary batteries used especially for in-vehicle applications etc. are used as assembled batteries in which two or more secondary batteries are connected in series in addition to being used alone because the required output is large.
  • the holders 7 that provide the pressure resistance described above are not individually installed, but, for example, the batteries are arranged so as to be in close contact with each other, and the surroundings have sufficient strength. It is also possible to adopt a form in which the secondary battery itself is used as a component that imparts pressure resistance to the adjacent secondary battery.
  • the holding method of the secondary battery 1 to the holder 7 is not only by engagement but also fixed by using a member that sandwiches the exposed portion of the cover plate 3, so-called clamp, or externally with respect to the cover plate 3 made of metal. Techniques such as welding and fixing metal parts can also be selected, and can be appropriately selected according to a desired fixing situation.
  • the negative electrode 32 has a negative electrode mixture layer 32a on both surfaces of the negative electrode current collector.
  • the negative electrode mixture layer 32a is formed on both surfaces of the negative electrode current collector through a slurry in which the negative electrode mixture is dissolved or dispersed in an appropriate solvent.
  • an aqueous system or an organic system can be used.
  • water is used as the aqueous system, and N-methylpyrrolidone (hereinafter abbreviated as NMP) is preferable as the organic system, but as long as the slurry properties are not affected. Widely used organic solvents can also be used.
  • the negative electrode mixture has at least a negative electrode active material and a binder.
  • the negative electrode active material is not particularly limited as long as it can occlude and release lithium ions, occludes lithium ions during battery charging, and releases them during discharging.
  • a carbon material is particularly useful as a material that satisfies the above requirements and can ensure a practically necessary amount, and examples thereof include crystalline carbon and amorphous carbon.
  • graphite which is a kind of crystalline carbon, is preferable because it has a large amount of occlusion of lithium ions per unit weight.
  • the negative electrode active material of the present invention preferably uses graphite powder as a main material.
  • Examples of graphite include natural graphite produced in addition to artificial graphite obtained by granulating and firing at high temperature using an organic material as a raw material. Artificial graphite is obtained by firing an organic compound as a raw material, but the maximum firing temperature exceeds 2000 ° C. A high firing temperature indicates a high heat cost during production.
  • natural graphite is a carbon material that has already been graphitized, and does not require the above-mentioned firing process by being naturally produced. For this reason, the manufacturing cost of a negative electrode active material can be restrained cheaply.
  • graphite has a high reactivity at the edge surface of the graphite crystal structure exposed at the end face, and reacts with the electrolyte during charge / discharge of the secondary battery to decompose it.
  • a method of forming a coating layer made of amorphous carbon on the surface of the graphite powder is known, and in this embodiment, the graphite powder having a coating layer made of amorphous carbon formed on the surface is also used.
  • the coating layer made of amorphous carbon can be obtained by a technique in which petroleum or coal-based pitch is attached to the surface of graphite powder serving as a nucleus and baked at a temperature of 1000 ° C. or lower to form a carbon layer.
  • the shape of the negative electrode mixture layer according to the present embodiment is maintained by binding the negative electrode active materials to each other and / or the negative electrode active material and the current collector with a binder.
  • the binder of the present invention is not particularly limited as long as it is a material that gives an aqueous slurry in which the material is dissolved and dispersed in water and enables the preparation of the negative electrode mixture layer.
  • the binder contains a binder component that gives a binding force and a thickening component that adjusts the properties of the aqueous slurry.
  • the binder component those having an olefinically unsaturated bond in the molecule are suitable, and the type is not particularly limited.
  • styrene butadiene rubber, styrene-isoprene-styrene rubber, acrylonitrile-butadiene rubber, styrene-acrylic copolymer are used.
  • examples thereof include polymers.
  • SBR styrene butadiene rubber
  • the thickening component is not particularly limited as long as it is difficult to handle when preparing the negative electrode mixture layer, but carboxymethyl cellulose (hereinafter abbreviated as CMC) is preferable from the viewpoint of chemical stability and availability. .
  • SBR is an artificial polymer whose main raw materials are styrene and 1,3-butadiene, and in order to obtain the desired properties, other organic compounds having an unsaturated bond can be added as desired to obtain desired properties. It can be a binder of characteristics. Usually, it is stored and used in the form of an emulsion in which particles having a diameter of less than 1 ⁇ m are dispersed in water.
  • the amount of SBR added is preferably 0.5 parts by mass or more and 2.0 parts by mass or less, more preferably 0.7 parts by mass or more and 1.5 parts by mass or less, with respect to the weight of the whole negative electrode mixture layer. 8 parts by mass or more and 1.2 parts by mass or less are more preferable. If the amount is less than 0.5 parts by mass, there is a strong possibility that the binding ability is significantly insufficient. If the amount exceeds 2.0 parts by mass, the binding ability becomes excessive, and the excess SBR inhibits the migration of lithium ions. The rise of becomes obvious.
  • CMC is a derivative obtained by chemically treating cellulose and imparting water solubility.
  • Cellulose as a raw material is a polysaccharide in which ⁇ -glucose is linked in a chain and is a polymer obtained in nature.
  • Cellulose itself has poor solubility and is insoluble in water and many organic solvents, but carboxymethylcellulose added with water solubility by chemical treatment can be dissolved in water and thickens the aqueous solution. High effect.
  • the amount of CMC added is preferably 0.5 parts by mass or more and 2.0 parts by mass or less, more preferably 0.7 parts by mass or more and 1.5 parts by mass or less, with respect to the total weight of the negative electrode mixture layer. 8 parts by mass or more and 1.2 parts by mass or less are more preferable. If the amount is less than 0.5 parts by mass, the stability of the aqueous slurry used in the production of the negative electrode is likely to be insufficient. If the amount exceeds 2.0 parts by mass, the thickening ability becomes excessive, making it difficult to apply the negative electrode during production. . Further, as in the case of SBR, an increase in DCR becomes obvious.
  • the negative electrode mixture layer can be formed by a method of applying and drying a slurry on a current collector.
  • the method for applying the slurry on the current collector include a knife coating method, a roll coating method, a spray coating method, a gravure coating method, a bar coating method, a curtain coating method, and a die coating method.
  • the die coating method is preferable because the application amount can be easily adjusted and the uniformity is excellent.
  • heat drying is preferable, and the drying temperature and drying time are appropriately adjusted according to the amount of slurry applied as long as the material contained in the mixture layer does not change in quality. It's okay.
  • the coating amount of the negative electrode mixture layer is not particularly limited as long as the desired battery performance can be achieved, and is preferably about 10 to 200 g after drying per square meter. If it is less than 10 g, coating becomes difficult and production becomes difficult. On the other hand, if it exceeds 200 g, the flexibility of the mixture layer becomes poor, and peeling from the current collector and destruction due to cracking of the mixture layer are likely to occur.
  • the desired mixture layer density can be adjusted by pressing the obtained mixture layer.
  • a roll press is preferable from the productivity.
  • the density after pressing is preferably 1.0 g or more and 3.0 g or less per cubic centimeter, more preferably 1.2 g or more and 2.0 g or less, and further preferably 1.4 g or more and 1.6 g or less. If it is less than 1.0 g, the electrical continuity between the active materials and / or the active material and the current collector becomes poor, and the active material with poor continuity makes it difficult to insert and desorb lithium ions during charge and discharge, and the battery capacity is reduced. Incurs a decline. On the other hand, when the amount exceeds 3.0 g, it is difficult to permeate the electrolytic solution, so that lithium ions are not sufficiently transported, and the battery performance may be deteriorated such as a decrease in capacity and an increase in DCR.
  • the positive electrode 34 has a positive electrode mixture layer 34a on both surfaces of the positive electrode current collector.
  • the positive electrode mixture layer 34a is formed on both surfaces of the positive electrode current collector through a slurry in which the positive electrode mixture is dissolved or dispersed in an appropriate solvent.
  • an organic system is preferably used.
  • NMP N-methylpyrrolidone
  • a widely used organic solvent can be used as long as the slurry properties are not affected.
  • aromatic compounds such as toluene and xylene, aliphatic compounds such as hexane, ketone compounds such as acetone and methyl ethyl ketone, and alcohols may be used.
  • the positive electrode mixture has at least a positive electrode active material and a binder.
  • ⁇ Positive electrode active material> The positive electrode active material occludes and releases lithium ions in the non-aqueous electrolyte that the battery normally has, and takes in electrons.
  • the physical properties and types of the positive electrode active material are arbitrary as long as the effects of the present invention are not significantly impaired. Therefore, a positive electrode active material having any known physical property that is preferably used for a non-aqueous electrolyte secondary battery may be used.
  • lithium oxide or the like can be mentioned as a suitable material.
  • Specific examples of such lithium oxide include lithium cobalt oxide, lithium manganate, lithium nickelate, lithium iron phosphate, and lithium composite oxide (that is, two or more selected from the group consisting of cobalt, nickel, and manganese).
  • Lithium oxide containing the above metal and the like.
  • a positive electrode active material may be used individually by 1 type, and may be used 2 or more types by arbitrary ratios and combinations.
  • ⁇ Positive electrode binder> those having arbitrary physical properties can be used as long as the effects of the present invention are not significantly impaired.
  • examples thereof include a rubber binder similar to the negative electrode binder, and polyvinylidene fluoride (PVDF).
  • PVDF polyvinylidene fluoride
  • 1 type of binders other than a rubber binder may be contained independently, and 2 or more types may be contained by arbitrary ratios and combinations.
  • the positive electrode mixture layer can be formed by applying a slurry on a current collector and drying it, and a die coating method is preferred. NMP is preferred as the solvent for the slurry. The method of removing the solvent contained in the applied slurry is also preferably heat-dried in the same manner as the negative electrode, and the drying temperature and drying time are appropriately determined according to the amount of slurry applied, as long as the material contained in the mixture layer is not altered. You may adjust.
  • the coating amount of the positive electrode mixture layer is not particularly limited as long as the desired battery performance can be achieved, and is preferably about 15 to 300 g after drying per square meter. If it is less than 15 g, coating becomes difficult and production becomes difficult. Moreover, when it exceeds 300 g, the softness
  • the desired mixture layer density can be adjusted by pressing the obtained mixture layer.
  • a roll press is preferable from the productivity.
  • the density after pressing is preferably 2.0 g or more and 4.0 g or less per cubic centimeter, more preferably 2.5 g or more and 3.5 g or less, and even more preferably 2.7 g or more and 3.3 g or less. If it is less than 2.0 g, the electrical continuity between the active materials and / or the active material and the current collector becomes poor, and the active material with poor continuity makes it difficult to insert and desorb lithium ions during charge and discharge, and the battery capacity is reduced. Incurs a decline. On the other hand, when the amount exceeds 4.0 g, it is difficult to permeate the electrolytic solution, so that lithium ions are not sufficiently transported and battery performance may be deteriorated.
  • the thickness of the negative electrode current collector is usually 4 ⁇ m or more, preferably 6 ⁇ m or more, and its upper limit is usually 20 ⁇ m or less, preferably 10 ⁇ m or less.
  • the thickness of the positive electrode current collector is usually 5 ⁇ m or more, preferably 10 ⁇ m or more, and the upper limit is usually 20 ⁇ m or less, preferably 15 ⁇ m or less. If the thickness of the current collector is too thin, the strength of the electrode will decrease, and the electrode may be easily damaged. If it is too thick, the flexibility of the electrode will be impaired, and there will be restrictions on the battery manufacturing method in the subsequent process May occur.
  • the type of the current collector is arbitrary as long as the effect of the present invention is not significantly impaired, but usually a conductive material is used.
  • a current collector having conductivity for example, copper or a copper alloy is suitably used for the negative electrode, and aluminum or an aluminum alloy is suitably used for the positive electrode.
  • One type of current collector may be used alone, or two or more types may be used in any ratio and combination.
  • the shape of the current collector is arbitrary as long as the effect of the present invention is not significantly impaired, but is usually a foil shape.
  • the conductive material assists the exchange of electrons between the current collector and the active material.
  • the physical properties and types of the conductive material usually included in the negative electrode and the positive electrode according to the present embodiment are arbitrary as long as the effects of the present invention are not significantly impaired. Therefore, a conductive material having any known physical property that is suitably used for a non-aqueous electrolyte secondary battery may be used. Specific examples of such a conductive material include acetylene black and graphite.
  • a conductive material may be used individually by 1 type, and may be used 2 or more types by arbitrary ratios and combinations.
  • Examples of other materials included in the electrode mixture as needed include surfactants, antifoaming agents, and dispersing agents.
  • the electrode mixture contains a surfactant
  • the dispersion stability of each material contained in the slurry used for forming the mixture layer can be improved.
  • coating the slurry containing surfactant can be suppressed because an electrode mixture contains an antifoamer.
  • an electrode mixture contains a dispersing agent, aggregation of the active material contained in a slurry, and a conductive material etc. can be reduced when it contains.
  • Non-aqueous electrolyte The battery according to this embodiment usually has a non-aqueous electrolyte in addition to the binder.
  • a nonaqueous electrolytic solution is not particularly limited as long as it can occlude and release lithium ions with respect to the active material.
  • the non-aqueous electrolyte usually consists of a non-aqueous solvent and a non-aqueous electrolyte.
  • Any nonaqueous solvent may be used as long as the effects of the present invention are not significantly impaired.
  • a carbonate solvent is preferable.
  • Specific examples of the carbonate solvent include cyclic carbonates such as ethylene carbonate (EC) and propylene carbonate (PC), and chain carbonates such as dimethyl carbonate (DMC) and methyl ethyl carbonate (MEC).
  • a non-aqueous solvent may be used individually by 1 type, and may be used 2 or more types by arbitrary ratios and combinations.
  • any nonaqueous electrolyte contained in the nonaqueous electrolytic solution can be used as long as the effects of the present invention are not significantly impaired.
  • a lithium salt is particularly suitable.
  • Specific examples of such a lithium salt include lithium fluorophosphate (LiPF 6 ), lithium fluoroborate (LiBF 4 ), and the like.
  • a non-aqueous electrolyte may also be used individually by 1 type, and may use 2 or more types by arbitrary ratios and combinations.
  • a desired battery can be manufactured by combining the electrode and the non-aqueous electrolyte produced as described above.
  • FIG. 9 is a diagram for explaining the configuration of a battery container formed by bending a single film-shaped package
  • FIG. 9A is a development view of the battery container
  • FIG. 9B is a battery container
  • FIG. 9C is a cross-sectional view for explaining the sealing structure at the position C shown in FIG. 9A.
  • the battery container 2 is formed by folding a film-like package 201 cut into a shape along a development view of a desired battery container 2 along a fold line BL and having a flat bottomed shape. It is assembled into a simple box shape. And the tab 202 which is a part which opposes and overlaps is joined by laser welding, and it seals so that electrolyte solution may not leak. Further, for example, as shown in part C of FIG. 9A, when the battery case 2 is assembled, pinholes may be formed at the corners of the bottom surface 2A. A resin 203 as shown in c) is applied and sealed.
  • Ribs 11 are provided on the lower surface 10 b of the cover plate 3 so as to follow the shape of the opening 2 ⁇ / b> D of the battery container 2.
  • the material of the rib 11 was set to a composition similar to the SUS material included in the film-shaped package, and the weldability was improved.
  • a gas discharge valve 71 is installed in the lid plate 3 to improve battery safety, and an abnormal increase in battery internal pressure is detected between the positive electrode connection terminal 52 and the positive electrode external terminal 51 to provide current.
  • CID current cutoff valve, not shown
  • the viscosity was measured using a cone-plate viscometer according to JIS Z 8803.
  • the slurry was applied to the surface of a copper foil having a thickness of 10 ⁇ m by a die coating method so that the coating amount was 95 g / m 2 , sufficiently dried, further pressed, and a mixture density of 1.5 g / cm 3.
  • a negative electrode was prepared.
  • the negative electrode 32 was provided with a negative electrode uncoated portion 32b having no mixture layer at the end on one side in the longitudinal direction of the coating, and was used as a portion to which a current collector component was attached during battery assembly described later.
  • a kneaded positive electrode mixture was prepared. This positive electrode mixture was applied to the surface of an aluminum foil (positive electrode foil) having a thickness of 15 ⁇ m so that the coating amount on one side was 185 g / m 2 and dried sufficiently. A positive electrode of 2.75 g / cm 3 was produced. Then, similarly to the negative electrode 32, an uncoated portion (positive electrode uncoated portion 34b) was provided at one end in the longitudinal direction of the positive electrode 34.
  • a positive electrode current collector 53 and a negative electrode current collector 63 as current collector parts were welded to the positive electrode uncoated part 34 b and the negative electrode uncoated part 32 b of the obtained wound body 4, and stored in the battery container 2.
  • the opening 2D of the battery container 2 and the rib 11 of the lid plate 3 were brought into contact with each other and connected by laser welding to hermetically seal the battery container 2. Further, an electrolytic solution was injected from the liquid injection hole 72 to produce the lithium ion secondary battery 1.
  • FIG. 10 is a diagram for explaining another configuration of the battery container, in which FIG. 10 (a) is a perspective view showing an exploded state, and FIG. 10 (b) is a perspective view showing an assembled state.
  • the battery container 2 is configured by joining two three-dimensionally molded film-like packaging bodies 211.
  • each film-like package 211 includes a flat portion 212 that forms the wide side surface 2B, a flat portion 213 that forms part of the narrow side surface 2C, and a portion of the bottom surface 2A. It has a plane part 214 to be configured.
  • the flat portions 213 and 214 have a width that is half the thickness width of the battery case 2.
  • a flange 215 is provided at the edge of the flat portions 213 and 214.
  • the battery container 2 is formed by bringing the flanges 215 of the pair of film-shaped packaging bodies 211 into contact with each other and joining them by laser welding.
  • Example 2 Similarly to Example 1, the positive electrode current collector 53 and the negative electrode current collector 63 were welded to the wound body 4 and stored in the battery container 2. The opening 2D of the battery container 2 and the rib 11 of the lid plate 3 were brought into contact with each other and connected by laser welding to hermetically seal the battery. Further, an electrolytic solution was injected into the battery container 2 from the liquid injection hole 72 to produce the lithium ion secondary battery 1.
  • FIG. 11A and 11B are views for explaining a modification of the battery case shown in FIG. 10, FIG. 11A is a perspective view showing an assembled state, and FIG. 11B is a plan view showing an enlarged main part. It is.
  • the flat portion 213 constituting the narrow side surface 2C is inclined with respect to the flat portion 212.
  • the flat surface portion 213 is inclined so as to protrude in the lateral width direction as it approaches the flange 215 from the flat surface portion 212 constituting the wide side surface 2B.
  • the rib 11 is also formed with the rib outer surface 11 a inclined so as to face the flat portion 213.
  • the angle of the boundary portion between the flanges 215 is acute due to the inclination of the flat portion 213, and the rib outer surface 11 a of the cover plate 3 is also along the flat portion 213. Inclined. Therefore, the gap between the boundary portion of the pair of flat portions 213 and the rib outer surface 11a of the cover plate 3 can be reduced, and the battery case 2 can be sealed and sealed more reliably by the cover plate 3.
  • FIGS. 10 and 11 are diagrams for explaining another example of the configuration of the battery case.
  • the method of forming the battery container 2 is not limited to the method shown in FIGS. 10 and 11 and can be formed by various methods. For example, in the example shown in FIG. 12, it is formed by bending one sheet-like package body 21 into a U shape and binding both ends in the width direction. Binding ears 221 are provided on the pair of narrow side surfaces 2 ⁇ / b> C of the battery container 2.
  • FIG. 13 it forms by joining the sheet-like package body 21 so that the inner wall surfaces of both ends may overlap, and making it a cylinder shape, and also binding the lower end used as the bottom face 2A.
  • a binding ear 222 is provided on one narrow side surface 2 ⁇ / b> C and bottom surface 2 ⁇ / b> A of the battery container 2.
  • one film-shaped package 21 is joined into a cylindrical shape so that the inner wall surface of one end 224 and the outer wall surface of the other end 225 overlap each other, and further, the bottom surface 2A It is formed by binding the lower ends.
  • a binding ear 223 is provided on the bottom surface 2 ⁇ / b> A of the battery container 2.
  • the length of the binding ears 221 and 222 can be shortened and the sealing performance can be improved as compared with the battery container 2 shown in FIGS. 10 and 11. .
  • the length of the binding ear 223 can be further shortened, and the battery container 2 can be downsized.
  • FIG. 15 is an external perspective view of a secondary battery according to the second embodiment of the present invention
  • FIG. 16 is a diagram illustrating the configuration of a cover plate
  • FIG. 17 is a diagram illustrating an example of a battery container fixing structure.
  • the same components as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.
  • What is characteristic in the present embodiment is that the battery container 2 is fixed to a lower region that is a part of the side surface 10 a of the flat plate portion 10 of the cover plate 3, and the upper region that is a part of the side surface 10 a is covered by the battery container 2. It is an exposed part that is exposed to the outside without breaking.
  • the lithium ion secondary battery 1 includes a battery container 2 that houses a wound body 4 (see FIG. 2), and a lid plate 3 that closes an opening 2D of the battery container 2.
  • the battery container 2 is configured by a film-shaped package 21, and the cover plate 3 is configured by a metal material having a composition similar to the metal film 22 of the film-shaped package 21.
  • the flat plate portion 10 of the cover plate 3 has a substantially constant thickness, and the rib 11 (see FIG. 2) in the first embodiment is not provided.
  • the flat plate part 10 has a size that can be inserted into the opening 2D of the battery case 2, has a thickness larger than that of the first embodiment, and has a wide side surface 10a.
  • the side surface 10a has a lower region located on the lower surface 10b side and an upper region located on the front surface 10c side.
  • the battery container 2 is inserted with the cover plate 3 through the opening 2D, and the lower region of the side surface of the cover plate 3 is connected to the opening end of the battery container 2 as shown in FIGS. 16 (a) and 16 (b). It is arranged to face each other, and is arranged at a position where the upper region of the side surface 10a protrudes from the battery container 2 and is exposed.
  • the open end of the battery container 2 is laser welded to the lower region of the side surface 10a of the cover plate 3 and hermetically sealed.
  • the upper region of the side surface 10a of the cover plate 3 that hermetically seals the battery container 2 is not covered with the battery container 2, and constitutes an exposed portion that is exposed to the outside.
  • the lithium ion secondary battery 1 can be positioned at a desired position using the upper region of the side surface 10a of the cover plate 3 as a reference point for lateral positioning of the lithium ion secondary battery 1, and the battery can be held. It becomes easy.
  • the cover plate 3 is simpler and easier to make than the first embodiment, and the manufacturing cost can be reduced.
  • FIGS. 18 and 19 are diagrams illustrating another example of the battery container fixing structure.
  • the cover plate 3 has a side surface fixed to the opening edge of the opening 2D of the battery container 2 and an exposed portion outside. It is only necessary to have an upper region that is exposed.
  • the thickness of the flat plate portion 10 is as thin as in the first embodiment, but ribs 12 and 13 are provided on the outer edge of the flat plate portion 10, and the side surface of the lid plate 3. Is extended or extended downward or upward.
  • the flat plate portion 10 has a size that can be inserted into the opening 2D of the battery case 2.
  • the side surface of the cover plate 3 is configured by a side surface 10 a of the flat plate portion 10 and rib outer surfaces 12 a and 13 a of ribs 12 and 13 that are flush with the side surface 10 a of the flat plate portion 10.
  • the rib 12 shown in FIG. 18 protrudes downward from the outer edge of the flat plate portion 10, and the rib outer surface 12 a is continuous with the side surface 10 a of the flat plate portion 10.
  • the side surface of the cover plate 3 is configured by the side surface 10 a of the flat plate portion 10 and the rib outer surface 12 a of the rib 12, and the rib 12 side is a lower region welded to the battery container 2.
  • the part 10 side is an upper region exposed to the outside.
  • the rib 13 shown in FIG. 19 protrudes upward from the outer edge of the flat plate portion 10, and the rib outer surface 13 a is continuous with the side surface 10 a of the flat plate portion 10.
  • the side surface of the cover plate 3 is constituted by the side surface 10 a of the flat plate portion 10 and the rib outer surface 13 a of the rib 13, and the flat plate portion 10 side is a lower region welded to the battery container 2.
  • the rib 13 side is an upper region exposed to the outside.
  • the cover plate 3 is inserted into the battery container 2 from the opening 2D, the lower region of the side surface of the cover plate 3 is disposed opposite the inner wall surface of the opening 2D of the battery container 2, and the upper region of the side surface of the cover plate 3 Is disposed at a position protruding from the battery container 2 and exposed. Then, the opening edge of the opening 2D of the battery container 2 is laser-welded to the lower region of the side surface of the cover plate 3 and hermetically sealed. The upper region of the side surface of the cover plate 3 is not covered with the battery container 2 and constitutes an exposed portion exposed to the outside.
  • the upper region of the side surface of the cover plate 3 is used as a reference point for lateral positioning of the lithium ion secondary battery 1, and the lithium ion secondary battery 1 is placed at a desired position. Can be positioned, and the battery can be easily held.
  • the thickness of the flat plate portion 10 can be reduced, and the material cost can be reduced and the weight can be reduced.
  • both the wide side surface 2B and the narrow side surface 2C of the battery case 2 are arranged on the inner side of the side surface 10a of the flat plate portion 10 of the lid plate 3, and the second embodiment Then, both the wide side surface 2 ⁇ / b> B and the narrow side surface 2 ⁇ / b> C of the battery container 2 are configured to protrude from the side surface 10 a of the flat plate portion 10 of the lid plate 3.
  • one of the wide side surface 2B and the narrow side surface 2C of the battery container 2 has a configuration in which the side surface 10a of the flat plate portion 10 of the lid plate 3 protrudes.
  • the length in the long side direction of the flat plate portion 10 is the same as the length in the long side direction of the rib 11, and the side surface 10 a of the flat plate portion 10 and the rib outer surface 11 a of the rib 11 are short. Are continuously formed on the same plane.
  • the battery case 2 is disposed at a position where the narrow side surface 2C of the battery case 2 protrudes from the battery case 2 as shown in FIGS. 20 (a) and 20 (c).
  • the length of the flat plate portion 10 in the short side direction is longer than the length of the rib 11 in the short side direction, and the side surface 10a of the flat plate portion 10 is longer than the rib outer surface 11a of the rib.
  • the battery container 2 is disposed at a position where the side surface 10 a of the flat plate portion 10 of the cover plate 3 protrudes more laterally than the wide side surface 2 ⁇ / b> B of the battery container 2.
  • the length in the long side direction of the flat plate portion 10 can be made shorter than in the first and second embodiments, and the size of the unit cell can be reduced.
  • the lid plates 3 of the lithium ion secondary batteries 1 adjacent to each other are connected to the side surfaces 10 a of the flat plate portion 10. Can be positioned by abutting.
  • the length in the short side direction of the flat plate portion 10 is the same as the length in the short side direction of the rib 11, and the side surface 10 a of the flat plate portion 10 and the rib outer surface 11 a of the rib 11 are long. Are continuously formed on the same plane.
  • the battery case 2 is disposed at a position where the wide side surface 2B of the battery case 2 protrudes from the battery case 2, as shown in FIGS. 21 (a) and 21 (b).
  • the length in the long side direction of the flat plate portion 10 is longer than the length in the long side direction of the rib 11, and the side surface 10 a of the flat plate portion 10 protrudes from the rib outer surface 11 a of the rib 11 on the short side. Is arranged.
  • the battery container 2 is disposed at a position where the side surface 10 a of the flat plate portion 10 of the cover plate 3 protrudes more laterally than the narrow side surface 2 C of the battery container 2.
  • positioning can be performed by the side surface 10a of the flat plate portion 10 of the lid plate 3 protruding to the side from the narrow side surface 2C of the battery case 2.
  • the length of the short side direction of the flat plate part 10 can be shortened rather than 1st and 2nd embodiment, and size reduction as a unit cell can be achieved.
  • the adjacent battery containers 2 are brought into contact with each other to shorten the length in the column direction.
  • the battery pack can be reduced in size.
  • FIG. 22 is a diagram for explaining the configuration of the lithium ion secondary battery according to the fourth embodiment.
  • FIG. 22 (a) is a perspective view
  • FIG. 22 (b) is an enlarged view of a main part from the front. It is.
  • detailed description is abbreviate
  • a notch is provided in the opening edge of the opening 2D of the battery container 2 to form an exposed portion in which the side surface of the cover plate 3 is partially exposed to the outside.
  • the battery container 2 is welded to the side surface 10 a of the flat plate portion 10 of the lid plate 3 with the opening edge of the opening portion 2 ⁇ / b> D disposed at the same height as the upper end of the rib 13.
  • the battery case 2 has a notch 2E formed by partially notching the opening edge of the opening 2D.
  • the notch 2E is provided on each of the pair of wide side surfaces 2B, and is formed at a central position in the long side direction.
  • the lithium ion secondary battery 1 can be positioned in the lateral direction with the exposed portion on the side surface of the cover plate 3 exposed from the notch 2E of the battery container 2 as a reference.
  • the lithium ion secondary battery 1 according to the present invention has a metal film-like package 21 in the battery container 2, has a high capacity, and uses the exposed portion on the side surface of the cover plate 3 to surround the surrounding members. It can be held with high positional accuracy, can withstand long-term use, and can be suitably used particularly for automobiles, railways and the like.
  • the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed.
  • the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described.
  • a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

La présente invention vise à proposer un moyen de positionnement d'une pile rechargeable par mise en prise, etc, avec un élément environnant, et pour faciliter des mesures vis-à-vis de vibration et d'accélération pendant le déplacement. La pile rechargeable (1) selon la présente invention comprend un conteneur de pile (2), qui comprend un corps de conditionnement en forme de film (21), et une plaque de couvercle (3) destinée à sceller hermétiquement la partie d'ouverture (2D) du conteneur de pile (2), la pile rechargeable (1) étant caractérisée en ce que le bord d'ouverture de la partie d'ouverture (2D) du conteneur de pile (2) est fixé à la surface latérale de la plaque de couvercle (3) et la plaque de couvercle (3) a une partie exposée, qui est exposée depuis le conteneur de pile, sur la surface latérale de la plaque de couvercle (3).
PCT/JP2016/057267 2015-03-17 2016-03-09 Pile rechargeable WO2016147967A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015053411A JP2018077931A (ja) 2015-03-17 2015-03-17 二次電池
JP2015-053411 2015-03-17

Publications (1)

Publication Number Publication Date
WO2016147967A1 true WO2016147967A1 (fr) 2016-09-22

Family

ID=56920156

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/057267 WO2016147967A1 (fr) 2015-03-17 2016-03-09 Pile rechargeable

Country Status (2)

Country Link
JP (1) JP2018077931A (fr)
WO (1) WO2016147967A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3968444A1 (fr) * 2020-09-09 2022-03-16 Prime Planet Energy & Solutions, Inc. Batterie et boîtier de batterie inclus dans la batterie et élément de boîtier de batterie pour la construction de boîtier de batterie

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6748936B2 (ja) * 2015-09-24 2020-09-02 株式会社Ｇｓユアサ 蓄電素子
JP7334140B2 (ja) * 2020-09-09 2023-08-28 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 密閉型二次電池および該電池用電池ケース

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62229655A (ja) * 1986-03-28 1987-10-08 Shin Kobe Electric Mach Co Ltd 密閉形鉛蓄電池
JPH04149957A (ja) * 1990-10-13 1992-05-22 Japan Storage Battery Co Ltd 密閉式鉛蓄電池
JP2006318671A (ja) * 2005-05-10 2006-11-24 Mitsubishi Motors Corp 電池
JP2011181485A (ja) * 2010-02-05 2011-09-15 Sanyo Electric Co Ltd 角形電池及びその製造方法ならびにこれを用いてなる組電池
WO2012057169A1 (fr) * 2010-10-26 2012-05-03 三洋電機株式会社 Dispositif d'alimentation, véhicule l'utilisant, élément de batterie et procédé de fabrication d'élément de batterie
JP2013184290A (ja) * 2012-03-05 2013-09-19 Nippon Steel & Sumikin Materials Co Ltd レーザー溶接用ラミネート金属箔

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62229655A (ja) * 1986-03-28 1987-10-08 Shin Kobe Electric Mach Co Ltd 密閉形鉛蓄電池
JPH04149957A (ja) * 1990-10-13 1992-05-22 Japan Storage Battery Co Ltd 密閉式鉛蓄電池
JP2006318671A (ja) * 2005-05-10 2006-11-24 Mitsubishi Motors Corp 電池
JP2011181485A (ja) * 2010-02-05 2011-09-15 Sanyo Electric Co Ltd 角形電池及びその製造方法ならびにこれを用いてなる組電池
WO2012057169A1 (fr) * 2010-10-26 2012-05-03 三洋電機株式会社 Dispositif d'alimentation, véhicule l'utilisant, élément de batterie et procédé de fabrication d'élément de batterie
JP2013184290A (ja) * 2012-03-05 2013-09-19 Nippon Steel & Sumikin Materials Co Ltd レーザー溶接用ラミネート金属箔

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3968444A1 (fr) * 2020-09-09 2022-03-16 Prime Planet Energy & Solutions, Inc. Batterie et boîtier de batterie inclus dans la batterie et élément de boîtier de batterie pour la construction de boîtier de batterie
CN114243179A (zh) * 2020-09-09 2022-03-25 泰星能源解决方案有限公司 电池及该电池具备的电池壳体、和用于构建该电池壳体的电池壳体部件

Also Published As

Publication number Publication date
JP2018077931A (ja) 2018-05-17

Similar Documents

Publication Publication Date Title
JP6517917B2 (ja) ２つ以上のケース部材を含む角型電池セル
JP6250567B2 (ja) 密閉型電池
JP6538650B2 (ja) 円筒形密閉電池
JP6254102B2 (ja) 密閉型電池
WO2015045632A1 (fr) Cellule assemblée
JP6086240B2 (ja) 非水電解液電池およびその製造方法
WO2018180828A1 (fr) Batterie cylindrique
WO2009157507A1 (fr) Pile secondaire lithium-ion
JP6198844B2 (ja) 組電池
US20130209849A1 (en) Prismatic secondary battery
KR20090065587A (ko) 안전성이 개선된 파우치형 이차전지
CN103227311A (zh) 密闭型二次电池
KR101787254B1 (ko) 이차 전지
US20120003512A1 (en) Secondary battery and production method thereof
JP2011210390A (ja) 電池及び電池モジュール
JP2019053862A (ja) 積層電極体及び蓄電素子
US20160351949A1 (en) Lithium ion secondary battery
JP2013026123A (ja) 二次電池および電極板
JP6862919B2 (ja) 角形リチウムイオン二次電池
WO2016147967A1 (fr) Pile rechargeable
WO2018062231A1 (fr) Batterie secondaire en forme de carré
JP6113972B2 (ja) 二次電池
JP2019016494A (ja) 積層電極体の製造方法及び蓄電素子の製造方法
JP2017188338A (ja) 二次電池
JP2020149935A (ja) 電池モジュール

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16764797

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: JP

122 Ep: pct application non-entry in european phase

Ref document number: 16764797

Country of ref document: EP

Kind code of ref document: A1