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WO2001078165A1 - Batterie fermee, corps etanche et contenant exterieur monobloc - Google Patents

Batterie fermee, corps etanche et contenant exterieur monobloc Download PDF

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Publication number
WO2001078165A1
WO2001078165A1 PCT/JP2001/002436 JP0102436W WO0178165A1 WO 2001078165 A1 WO2001078165 A1 WO 2001078165A1 JP 0102436 W JP0102436 W JP 0102436W WO 0178165 A1 WO0178165 A1 WO 0178165A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
hole
plate
metal
internal pressure
Prior art date
Application number
PCT/JP2001/002436
Other languages
English (en)
Japanese (ja)
Inventor
Hiroaki Kawamura
Akira Kaneko
Yoshihiko Isobe
Kunio Nishimura
Original Assignee
Toyo Kohan Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Kohan Co., Ltd. filed Critical Toyo Kohan Co., Ltd.
Priority to AU44561/01A priority Critical patent/AU4456101A/en
Publication of WO2001078165A1 publication Critical patent/WO2001078165A1/fr

Links

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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • 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 a sealed battery, a sealing body, and an outer can that can be ruptured at a predetermined pressure, particularly at low pressure, when the battery temperature or battery internal pressure increases, to release the internal pressure promptly and at the same time to cut off the current.
  • non-aqueous electrolytes such as lithium ion secondary batteries, which are lightweight and have a high energy density
  • lithium polymer batteries using gel electrolytes which are non-aqueous electrolytes
  • the alkali metal reacts very easily with water and generates gas.
  • Such a completely sealed battery has the advantage of excellent storage properties, but on the other hand, because of its high sealing properties, it is exposed to high temperatures, short-circuited inside or outside the battery, and a large current flows.
  • Hydrogen gas generated by water mixed in during production can cause abnormal rise in internal pressure of the battery, causing the battery to rupture and damage equipment, and in some cases, injure the user. Therefore, a mechanism is required to release the pressure to the outside before the internal pressure becomes too high.
  • a valve chamber having a valve hole communicating with the inside of the battery and an exhaust hole communicating with the outside is formed in a part of the outer can, and at least the valve hole is formed in the valve chamber.
  • a valve body made of rubber whose surface facing the side and the rubber surface of the valve body This is a safety valve equipped with an elastic body that presses the valve into the valve hole. The rubber seals the valve hole to maintain hermeticity, and when the internal pressure rises, the valve opens when the internal pressure reaches the release pressure set in advance for the elastic body. The hole is opened to prevent the internal pressure from rising more than the set value.
  • the method of forming the thin inner part is to cold compress the can wall with a suitable press device and to provide a part of the can wall with a thickness of about half of the original thickness. Since the processing is only to change the shape, the sealability at this place is good.
  • a valve membrane is provided in an opening above an electrode body in a bottomed cylindrical outer can, and a current interrupting lead is provided above the valve membrane.
  • a current interrupting lead is provided above the valve membrane.
  • the present invention provides a valve element which can be stably and accurately obtained at a low pressure, can be released at a predetermined pressure to release the internal pressure promptly, and is easily manufactured.
  • a technical problem is to provide a sealed battery having a chip, a sealing body and an outer can used for the battery. Further, the present invention provides a sealing body, an outer can, and a sealing body having a structure that is easy to handle and hard to generate a defective portion that cannot be adopted as a product when manufacturing the above-described sealing body and the outer can. Providing sealed batteries is also a technical issue. Disclosure of the invention
  • an electrode body composed of a positive electrode, a negative electrode, and a separator is housed in a battery outer can together with an electrolytic solution, and is fitted and supported on the inner periphery of the outer can opening.
  • the sealing body is formed from a metal substrate having a circular or linear through hole provided on an endless circumference with a small space therebetween. And a metal foil laminated on the inner surface of the metal substrate so as to close the through-hole, wherein the metal plate can be easily deformed with a small force when the internal pressure of the battery rises.
  • the present invention provides a sealed battery in which a narrow portion and an interval portion extend to protrude a valve body portion surrounded by a circular or linear through hole provided on the endless periphery. Further, the present invention provides a sealed battery including an outer can having such a valve structure.
  • the valve body chip made of a metal base having a circular or linear through-hole and a metal foil laminated with a metal plate so as to close the through-hole is used as a pressure-receiving plate.
  • the flat contact surface portion of 1 protrudes, and the welded portion breaks further, electrically separating from the metal foil and interrupting the electrical connection.
  • the metal foil laminated so as to close the opening of the valve body made of the metal plate having the through hole is broken and gas inside the battery is released to the outside, thereby preventing the explosion of the battery can.
  • Materials with this configuration can also be applied to battery outer cans. When the internal pressure of the battery rises, the laminated metal foil that closes the through hole breaks and gas is released to the outside.
  • the through holes are circular or linear, and each hole is on the endless circumference.
  • the through hole may be a combination of a circular shape and a linear shape, or may be a linear shape only.
  • the circle includes a circle, an ellipse, a march, and the like, and the size thereof is not particularly limited.
  • the width of the through hole is not particularly limited, but is preferably in the range of 0.6 to 1.4 mm.
  • the width of the opening is narrow, when laminating metal foil, wrinkling of the foil at the opening is less likely to occur. Since the occurrence of wrinkles is small, a sealing body or an outer can having a stable operating pressure is obtained.
  • the metal plate substrate is a steel plate, a stainless steel plate, a copper plate, an aluminum plate, a nickel plate, a lead plate, a chromium plate or an alloy plate thereof, and a metal plate obtained by plating these metal plates is preferable.
  • the metal foil is preferably a steel foil, a stainless steel foil, a copper foil, an aluminum foil, a nickel foil, or a nickel alloy foil such as a nickel-iron alloy.
  • sealing body or the outer can of the present invention a part of the sealing body or the outer can is deformed at a constant pressure due to the internal pressure of the battery, and a part of the sealing body or the outer can is broken at a constant pressure. It has a mechanism to release the internal pressure, and the internal pressure release pressure can be set arbitrarily by the material and thickness of the metal foil.
  • These sealing bodies or outer cans can be used not only for secondary batteries such as lithium-ion batteries, polymer batteries, Ni-Cd batteries or nickel-hydrogen batteries, but also for primary batteries such as manganese batteries, alkaline manganese batteries or lithium batteries. Also applicable to batteries. BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 is an upper longitudinal sectional view of an example of the completely sealed battery of the present invention.
  • FIG. 2 is a plan view of an example of the sealing body having the valve body of the present invention.
  • FIG. 3 is a longitudinal sectional view of the sealing body.
  • FIG. 4 is an explanatory diagram of the operation of the sealing body when the battery internal pressure rises abnormally.
  • FIG. 5 is a plan view of another example of the sealing body having the valve body of the present invention.
  • FIG. 6 is a longitudinal sectional view of the sealing body.
  • FIG. 7 is an explanatory diagram of the operation of the sealing body when the battery internal pressure rises abnormally.
  • FIG. 1 is an upper longitudinal section of an example of the completely sealed battery of the present invention.
  • FIG. 2 is a plan view of an example of a sealing body having a valve body.
  • FIG. 3 is a longitudinal sectional view of the sealing body shown in FIG. 2
  • FIG. 4 is an operation explanatory diagram of the sealing body when the battery internal pressure in the sealing body shown in FIG.
  • FIG. 5 is a plan view of another example of a sealing body having a valve body.
  • FIG. 6 is a longitudinal sectional view of the sealing body shown in FIG. 5
  • FIG. 7 is an explanatory diagram of the operation of the sealing body when the internal pressure of the battery in the sealing body shown in FIG.
  • an electrode body 12 shielded from the outside in an electrolyte is accommodated in a bottomed cylindrical outer can 11 also serving as a negative electrode terminal.
  • the electrode body 12 has a configuration in which a laminate of a positive electrode 13 and a negative electrode 15 provided in a state of being insulated and opposed to the positive electrode 13 via a separator 14 is spirally wound.
  • Sealing lid 2 1 having a gas vent hole 3 7 serving as a explosion-proof function and a positive electrode terminal are caulked via an insulating gasket 1 6 a to an upper end opening of the outer can 1 1.
  • a pressure receiving plate 18 having a gas vent hole 24 is provided above the electrode body 12.
  • a shielding plate 20 is provided, and the shielding plate 20 is a PTC thermistor element 2 3, the PTC thermistor element 23 is in contact with the sealing lid 21, and the PTC thermistor element 23 is caulked and fixed to the outer can 11 via the insulating gasket 16a.
  • the inner surface of the shielding plate 20 forming a sealing body for closing the opening at the upper part of the battery is formed by applying a lead 17 to the inner surface of the pressure receiving plate 18 attached to the pressure receiving plate 18 by welding or the like.
  • the lead wire 17 extends to the positive electrode 13 of the electrode body 12. Thus, a current path in the battery is formed.
  • the shielding plate 20 is substantially circular in plan view as shown in FIGS. 2 and 5, and the shielding plate 20 is a circular metal substrate 38 and a metal foil laminated and adhered to the inner surface of the metal substrate 38.
  • the material of the metal substrate 38 is a steel plate, a stainless steel plate, a copper plate, an aluminum plate or an alloy plate of these metals, and the metal foil 34 is a steel foil or a stainless steel foil. Either a copper foil, an aluminum foil, a nickel foil or a nickel alloy foil such as a nickel-iron alloy is used.
  • a plurality of through holes 33 (crescent shape in FIG. 2) (n, three in FIG. 2) It is located on the dressing circumference 3 and is provided so as to be connected endlessly.
  • These processes are performed, for example, by the following method. First, a crescent-shaped hole is punched in the metal substrate by pressing along the opening, and the space between the crescent-shaped holes is crushed so that the foil is not pressed during the subsequent cladding process and then cut. And cut out the opening. The base material of the cut-out opening is pushed into the original base material by the pushback method at the time of press working, and is used as a base material for cladding. As shown in FIG.
  • a metal foil 34 is laminated on a metal substrate 38 having a circular through hole 33 and a linear through hole 31 to produce a sealing body made of a clad material.
  • a known method can be applied to the method for producing the clad material, and is not particularly limited. For example, as disclosed in Japanese Patent Application Laid-Open No. 1224184, a method of performing cold rolling at a low rolling reduction is particularly preferable because deformation due to rolling is small.
  • the sealing body shown in Fig. 3 has a circular through hole as shown in Fig. 4.
  • the metal foil of 33 or the linear through hole 31 is broken, and gas is discharged to the outside through the gas vent hole 37 of the sealing lid 21 through the broken part of the metal foil.
  • the shape of the through-hole in the shielding plate is not only that a plurality of crescent-shaped through-holes are provided so as to be continuous on the circumference, but also, for example, as shown in Fig. 5,
  • the through-hole 31 may be configured such that it exists on the circumference of a circle centered on the center of the shielding plate 20.
  • the easily deformable portion sandwiched between the through-hole groups provided in the metal substrate 38 protrudes the first flat contact surface 27, cuts the adhesive portion, and cuts off the electrical connection.
  • the portion that closed the circular through hole 33 or the linear through hole 31 of the metal foil 34 ruptures at a predetermined pressure to generate a valve hole, thereby discharging the gas inside the battery to the outside. As a result, it is possible to prevent sudden temperature rise and explosion of the battery.
  • the pressure for operating the first flat contact surface 27 to protrude is such that the size of the easily deformable portion of the circular through hole 33 or the linear through hole 31 formed in the metal substrate 38 is within an appropriate range.
  • the material composition and selecting the material composition of the metal substrate 38 It can be set in the specified range.
  • the metal foil 34 closing the circular through-hole 33 or the linear through-hole 31 can be manufactured with high accuracy on the order of microns, a stable material can be obtained by selecting the material composition of the metal foil 34. Can be ruptured at operating pressure.
  • the sealing body or the outer can of the present invention even if the internal pressure of the battery increases due to short-circuiting, overcharging, reverse charging, or the like, when the internal pressure of the battery reaches a relatively low predetermined value.
  • the easily deformable portion provided on the metal substrate is deformed by a stable operating force and the internal pressure of the battery is further increased, the metal foil closing the through hole provided on the metal substrate is ruptured stably and accurately. The gas inside is exhausted to the outside, and it is possible to prevent sudden temperature rise and explosion of the battery.
  • the opening of the sealing body or the outer can is covered with a metal plate, the metal foil is extremely unlikely to be damaged and damaged by an external impact or the like, and the safety is remarkably improved.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

L'invention concerne une batterie complètement fermée comprenant des moyens permettant d'empêcher, de manière efficace, la montée en température et l'explosion de la batterie quand la pression interne de celle-ci augmente en raison de court-circuit, de surcharge ou de charge inverse et de permettre à une pression interne de la batterie d'être libérée immédiatement lors de l'arrêt du courant de manière à garantir la sécurité de la fiabilité de la batterie. Celle-ci comprend un corps étanche ou un contenant extérieur monobloc présentant une surface formée par une première surface de contact plate comprenant un substrat métallique doté de trous circulaires traversants disposés sur une périphérie sans fin ou des trous linéaires traversants séparés les uns des autres par une faible distance, ainsi que des feuilles métalliques fixées sur la surface intérieure du substrat métallique, de manière à fermer les trous circulaires ou linéaires traversants, une partie du substrat métallique comprenant un petit intervalle pouvant être déformé au moyen d'une faible force s'étendant lors que la pression interne de la batterie augmente et permettant à une partie entourée par les trous circulaires ou linéaires traversants situés sur la périphérie sans fin d'être projetés.
PCT/JP2001/002436 2000-04-05 2001-03-27 Batterie fermee, corps etanche et contenant exterieur monobloc WO2001078165A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU44561/01A AU4456101A (en) 2000-04-05 2001-03-27 Enclosed battery, sealed body, and outer packaged container

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-103927 2000-04-05
JP2000103927A JP2001291502A (ja) 2000-04-05 2000-04-05 密閉型電池、封口体及び外装缶

Publications (1)

Publication Number Publication Date
WO2001078165A1 true WO2001078165A1 (fr) 2001-10-18

Family

ID=18617554

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/002436 WO2001078165A1 (fr) 2000-04-05 2001-03-27 Batterie fermee, corps etanche et contenant exterieur monobloc

Country Status (3)

Country Link
JP (1) JP2001291502A (fr)
AU (1) AU4456101A (fr)
WO (1) WO2001078165A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2073269A1 (fr) 2007-12-21 2009-06-24 Helianthos B.V. Procédé pour la fourniture d'une connexion en série dans un système de cellule solaire
CN114497819A (zh) * 2022-01-27 2022-05-13 常州市华耀智能科技有限公司 一种可针对多环境使用的高效电动车电池

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07130346A (ja) * 1993-11-04 1995-05-19 Sony Corp 非水電解液二次電池
JPH10284035A (ja) * 1997-04-02 1998-10-23 Matsushita Electric Ind Co Ltd 密閉型電池用防爆封口板およびその製造方法
JPH1116558A (ja) * 1997-06-24 1999-01-22 Daido Steel Co Ltd クラッド板とその製造方法
JPH1186822A (ja) * 1997-09-09 1999-03-30 Matsushita Electric Ind Co Ltd 密閉型電池

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07130346A (ja) * 1993-11-04 1995-05-19 Sony Corp 非水電解液二次電池
JPH10284035A (ja) * 1997-04-02 1998-10-23 Matsushita Electric Ind Co Ltd 密閉型電池用防爆封口板およびその製造方法
JPH1116558A (ja) * 1997-06-24 1999-01-22 Daido Steel Co Ltd クラッド板とその製造方法
JPH1186822A (ja) * 1997-09-09 1999-03-30 Matsushita Electric Ind Co Ltd 密閉型電池

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2073269A1 (fr) 2007-12-21 2009-06-24 Helianthos B.V. Procédé pour la fourniture d'une connexion en série dans un système de cellule solaire
CN114497819A (zh) * 2022-01-27 2022-05-13 常州市华耀智能科技有限公司 一种可针对多环境使用的高效电动车电池

Also Published As

Publication number Publication date
AU4456101A (en) 2001-10-23
JP2001291502A (ja) 2001-10-19

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