JP3738466B2 - Sealed battery - Google Patents

Sealed battery Download PDF

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Publication number
JP3738466B2
JP3738466B2 JP18734395A JP18734395A JP3738466B2 JP 3738466 B2 JP3738466 B2 JP 3738466B2 JP 18734395 A JP18734395 A JP 18734395A JP 18734395 A JP18734395 A JP 18734395A JP 3738466 B2 JP3738466 B2 JP 3738466B2
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Japan
Prior art keywords
thin film
film material
hole
ring member
sealed battery
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JP18734395A
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Japanese (ja)
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JPH0935699A (en
Inventor
寛 西川
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Sony Corp
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Sony Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Description

【０００１】
【発明の属する技術分野】
本発明は密閉型電池に関し、より詳細には、斯かる密閉型電池における安全装置に関する。
【０００２】
【従来の技術】
密閉型電池には過充電等によって内部圧力が上昇したときに電池の破裂を防止するための安全装置又機構が設けられている。斯かる安全装置又は機構は、ケーシングの内部圧力が所定の値を超えると作動して内部圧力を解放するように構成されている。
【０００３】
斯かる安全装置として、ゴム等の弾性材料を使用したリリーフ弁型と封口板に刻印を設けた開裂弁型とがある。
【０００４】
【発明が解決しようとする課題】
リリーフ弁型は、使用するゴム等の材料が熱等により変質すると、ケーシングの密閉構造を維持することが困難になる欠点がある。ケーシングの密閉構造に欠陥が生じると、内部の電極材又は電解質が水分を吸収したり、外部に漏れることがある。
【０００５】
開裂弁型は、弁を開裂させるのに必要な極限圧を正確に設定するのが困難である欠点を有する。通常、弁の薄肉部の厚さ、刻印の大きさ及び深さ等を設定することによって開裂極限圧を設定するが、それでもバラツキが生ずる。
【０００６】
本発明は斯かる点に鑑み、正確に且つ高い精度にて作動する安全装置を設けた密閉型電池を提供することを目的とする。
【０００７】
本発明は斯かる点に鑑み、作動圧力の管理が容易であり、正確な作動圧力範囲を有する安全装置を設けた密閉型電池を提供することを目的とする。
【０００８】
【課題を解決するための手段】
本発明の密閉型電池は、安全装置を有する密閉型電池において、この安全装置は、密閉されたケーシングに孔が設けられ、該孔がリング部材で周囲を補強された薄膜材によって封口されてなり、このリング部材がこの孔に対応した寸法の孔を有し、この薄膜材の受圧面積は孔に一致されてなり、このケーシング、リング部材、及び薄膜材が全てシーム溶接によって接合されているとともに、このケーシングの孔が蓋部に設けられ、リング部材及び薄膜材が、溝が不存在の薄膜材とされ、電極と同一面上に離間された位置にあるものである。
また、本発明の密閉型電池は、上記の密閉型電池において、このケーシングの孔が底板に設けられているものである。
【０００９】
また、本発明の密閉型電池は、上記の密閉型電池において、このリング部材を介して薄膜材とケーシングの間を接合した接合力が開裂圧力より大きいものである。
【００１０】
また、本発明の密閉型電池は、上記の密閉型電池において、溝が不存在の薄膜材であるものである。
【００１１】
また、本発明の密閉型電池は、上記の密閉型電池において、このリング状部材が中心方向に突出しかつ先端が尖った突起部を有するものである。
【００１２】
また、本発明の密閉型電池の製造方法は、安全装置を有する密閉型電池の製造方法において、この安全装置は、密閉されたケーシングに孔を設け、該孔をリング部材で周囲を補強された薄膜材によって封口して作製し、このリング部材がこの孔に対応した寸法の孔を有し、この薄膜材の受圧面積は孔に一致されてなり、このケーシング、リング部材、及び薄膜材を全てシーム溶接によって接合する方法である。
【００１３】
また、本発明の密閉型電池の製造方法は、上記の密閉型電池の製造方法において、このリング部材を介して薄膜材とケーシングの間を接合した接合力を開裂圧力より大きくする方法である。
【００１４】
【発明の実施の形態】
以下に図１〜図３を参照して本発明による密閉型電池の安全装置の例を説明する。図１に本例による密閉型電池の組立図を示す。密閉型電池はケーシング３１と蓋部又は封口板４１とを有し、ケーシング３１内には図示しない適当な電極部材及び電解質が封入される。
【００１５】
本例によると蓋部４１には孔４２が設けられており、斯かる孔４２を覆うように薄膜材２１が設けられ、斯かる薄膜材２１の上にリング部材１１が装着されている。リング部材１１は蓋部４１の孔４２に対応した寸法の孔１２を有する。本例の安全装置は孔４２と薄膜材２１とリング部材１１とよりなる。
【００１６】
薄膜材２１は適当な厚さを有する金属箔であってよく、所定の開裂圧力によって破裂するように構成されている。薄膜材２１は適当な方法によって蓋部４１に接合されてよく、好ましくはレーザ溶接又は電子ビーム溶接法によるシーム溶接によって接合されてよい。
【００１７】
本例によると、開裂圧力は薄膜材２１の厚さと薄膜材２１の受圧面の寸法によって決まる。薄膜材２１の受圧面積は孔４２の面積に対応している。従って開裂圧力を調節するためには、薄膜材２１の厚さ又は孔４２の寸法を調節すればよい。
【００１８】
リング部材１１は薄膜材２１の周囲を補強するために設けられている。リング部材１１を使用しない場合、薄膜材２１と蓋部４１の間の接合は、開裂圧力によって乖離しないように十分を強度を有する必要がある。即ち、ケーシング３１の内部圧が上昇したとき、薄膜材２１と蓋部４１の間の接合が破壊する前に、薄膜材２１が開裂することが必要である。
【００１９】
しかしながら、薄膜材２１と蓋部４１の間の接合力を開裂圧力より大きくすることは一般に困難であるため、リング部材１１を設ける。斯かるリング部材１１は適当な金属材よりなり、同様に、好ましくはレーザ溶接又は電子ビーム溶接法によるシーム溶接によって接合されてよい。斯かる場合、薄膜材２１とリング部材１１は同時にシーム溶接によって接合されてよい。
【００２０】
図２を参照して本発明による密閉型電池の安全装置の他の例を説明する。この例では、安全装置はケーシング３１の底板５１に設けられた孔５２と薄膜材２１とリング部材１１とよりなる。本例の安全装置は図１の例と比較して蓋部４１に設けた代わりにケーシング３１の底板５１に設け点が異なり、それ以外は同様な構成であってよい。尚、本発明によると安全装置は蓋部４１及び底板５１に限らずケーシング３１の所望の位置に設けてよい。
【００２１】
図３はリング部材１１の例を示す。上述のようにリング部材１１は中心孔１２を有するが、斯かる孔１２は必ずしも円形である必要はない。図３Ａに示す例では斯かる孔１２は円形であるが、図３Ｂに示す例では孔１２は中心方向に突起した２つの突起部１２Ａを有し、図３Ｃに示す例では孔１２は中心方向に突起した１つの突起部１２Ａを有する。
【００２２】
斯かる突起部１２Ａの先端は鋭く尖っており、薄膜材２１の開裂を促進するように構成されている。
【００２３】
以上本発明の実施例について詳細に説明したが、本発明はこれらの例に限定されることなく特許請求の範囲に記載された発明の範囲にて様々な変更等が可能であることは当業者にとって理解されよう。
【００２４】
例えば、図１及び図２に示した例では、薄膜材２１及びリング部材１１はケーシング３１の外側面上に装着したが、ケーシング３１の内側面上に装着してもよい。
【００２５】
【発明の効果】
本発明の密閉型電池によると、開裂圧力は薄膜材の厚さ及び受圧面積を変化させることによって調節することができるから、安全装置のリリーフ圧を容易に且つ正確に管理することができる利点を有する。
【００２６】
本発明の密閉型電池によると、安全装置を構成する薄膜材２１及びリング部材は金属材より構成し、適当な方法によって接合されるから、腐食、熱変質等によって密閉構造が破壊されることがない利点がある。
【００２７】
本発明の密閉型電池によると、安全装置は孔、薄膜材及びリング部材よりなり、簡単な構造とすることができる利点がある。また、安全装置を簡単な製造方法によって製造することができる利点がある。
【００２８】
本発明の密閉型電池によると、安全装置の設計及び組立が容易になり安価に製造することができる利点がある。
【図面の簡単な説明】
【図１】本発明による密閉型電池の組立図である。
【図２】本発明による密閉型電池の他の例の組立図である。
【図３】本発明による密閉型電池の安全装置の構成例を示す図である。
【符号の説明】
１１ リング部材
１２ 孔
１２Ａ 突起部
２１ 薄膜材
３１ ケーシング
４１ 蓋部又は封口板
４２ 孔
５１ 底板
５２ 孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealed battery, and more particularly to a safety device in such a sealed battery.
[0002]
[Prior art]
The sealed battery is provided with a safety device or mechanism for preventing the battery from bursting when the internal pressure increases due to overcharge or the like. Such a safety device or mechanism is configured to operate and release the internal pressure when the internal pressure of the casing exceeds a predetermined value.
[0003]
As such a safety device, there are a relief valve type using an elastic material such as rubber and a cleavage valve type provided with a seal on a sealing plate.
[0004]
[Problems to be solved by the invention]
The relief valve mold has a drawback that it is difficult to maintain a sealed structure of the casing when the material such as rubber used is altered by heat or the like. If a defect occurs in the sealed structure of the casing, the internal electrode material or electrolyte may absorb moisture or leak to the outside.
[0005]
The cleavage valve type has the disadvantage that it is difficult to accurately set the ultimate pressure required to cleave the valve. Usually, the ultimate pressure is set by setting the thickness of the thin portion of the valve, the size and depth of the marking, etc., but variations still occur.
[0006]
In view of the above, an object of the present invention is to provide a sealed battery provided with a safety device that operates accurately and with high accuracy.
[0007]
In view of such a point, the present invention has an object to provide a sealed battery provided with a safety device that can easily manage the operating pressure and has an accurate operating pressure range.
[0008]
[Means for Solving the Problems]
The sealed battery according to the present invention is a sealed battery having a safety device. The safety device is provided with a hole in a sealed casing, and the hole is sealed with a thin film material whose periphery is reinforced by a ring member. , has a hole sized to the ring member corresponding to the hole, the pressure receiving area of the thin film material will be matched to the hole, the casing, the ring member, and with the thin film material is joined by all seam welding the casing of the hole is provided in the lid portion, the ring member and the thin film material, grooves are the thin film material of the absence, but in spaced positions on the electrode in the same plane.
Moreover, the sealed battery of the present invention is such that the hole of the casing is provided in the bottom plate in the above sealed battery.
[0009]
Further, the sealed battery of the present invention is such that, in the above sealed battery, the joining force for joining the thin film material and the casing through the ring member is larger than the cleavage pressure.
[0010]
The sealed battery of the present invention is a thin film material having no groove in the above sealed battery.
[0011]
Further, the sealed battery of the present invention is the above-described sealed battery, wherein the ring-shaped member has a protrusion protruding in the center direction and having a sharp tip.
[0012]
The sealed battery manufacturing method of the present invention is a sealed battery manufacturing method having a safety device, wherein the safety device is provided with a hole in a sealed casing, and the hole is reinforced by a ring member. The ring member has a hole having a size corresponding to the hole, and the pressure receiving area of the thin film material is matched to the hole , and the casing, the ring member, and the thin film material are all It is a method of joining by seam welding.
[0013]
The method for manufacturing a sealed battery according to the present invention is a method in which, in the above-described method for manufacturing a sealed battery, a bonding force for bonding the thin film material and the casing through the ring member is larger than the cleavage pressure.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An example of a sealed battery safety device according to the present invention will be described below with reference to FIGS. FIG. 1 shows an assembly drawing of a sealed battery according to this example. The sealed battery has a casing 31 and a lid or sealing plate 41, and an appropriate electrode member and electrolyte (not shown) are enclosed in the casing 31.
[0015]
According to this example, the lid portion 41 is provided with a hole 42, the thin film material 21 is provided so as to cover the hole 42, and the ring member 11 is mounted on the thin film material 21. The ring member 11 has a hole 12 having a size corresponding to the hole 42 of the lid portion 41. The safety device of this example includes a hole 42, a thin film material 21, and a ring member 11.
[0016]
The thin film material 21 may be a metal foil having an appropriate thickness, and is configured to be ruptured by a predetermined cleavage pressure. The thin film material 21 may be joined to the lid portion 41 by an appropriate method, and preferably joined by seam welding by laser welding or electron beam welding.
[0017]
According to this example, the cleavage pressure is determined by the thickness of the thin film material 21 and the size of the pressure receiving surface of the thin film material 21. The pressure receiving area of the thin film material 21 corresponds to the area of the hole 42. Therefore, in order to adjust the cleavage pressure, the thickness of the thin film material 21 or the size of the hole 42 may be adjusted.
[0018]
The ring member 11 is provided to reinforce the periphery of the thin film material 21. When the ring member 11 is not used, the bonding between the thin film material 21 and the lid portion 41 needs to have sufficient strength so as not to be separated by the cleavage pressure. That is, when the internal pressure of the casing 31 increases, the thin film material 21 needs to be cleaved before the joint between the thin film material 21 and the lid portion 41 is broken.
[0019]
However, since it is generally difficult to make the joining force between the thin film material 21 and the lid part 41 larger than the cleavage pressure, the ring member 11 is provided. Such a ring member 11 is made of a suitable metal material and may also be joined by seam welding, preferably by laser welding or electron beam welding. In such a case, the thin film material 21 and the ring member 11 may be joined simultaneously by seam welding.
[0020]
With reference to FIG. 2, another example of the safety device for a sealed battery according to the present invention will be described. In this example, the safety device includes a hole 52 provided in the bottom plate 51 of the casing 31, the thin film material 21, and the ring member 11. The safety device of this example differs from the example of FIG. 1 in that it is provided on the bottom plate 51 of the casing 31 instead of being provided on the lid 41, and the other configuration may be the same. According to the present invention, the safety device is not limited to the lid portion 41 and the bottom plate 51, and may be provided at a desired position of the casing 31.
[0021]
FIG. 3 shows an example of the ring member 11. As described above, the ring member 11 has the central hole 12, but the hole 12 does not necessarily have a circular shape. In the example shown in FIG. 3A, the hole 12 is circular, but in the example shown in FIG. 3B, the hole 12 has two protruding portions 12A protruding in the center direction, and in the example shown in FIG. 3C, the hole 12 is in the center direction. One protrusion 12A protruding from the bottom.
[0022]
The tip of the protrusion 12A is sharp and sharp, and is configured to promote the tearing of the thin film material 21.
[0023]
Although the embodiments of the present invention have been described in detail above, the present invention is not limited to these examples, and it will be understood by those skilled in the art that various modifications and the like can be made within the scope of the invention described in the claims. Will be understood.
[0024]
For example, in the example shown in FIGS. 1 and 2, the thin film material 21 and the ring member 11 are mounted on the outer surface of the casing 31, but may be mounted on the inner surface of the casing 31.
[0025]
【The invention's effect】
According to the sealed battery of the present invention, the cleavage pressure can be adjusted by changing the thickness of the thin film material and the pressure receiving area, so that the relief pressure of the safety device can be easily and accurately managed. Have.
[0026]
According to the sealed battery of the present invention, the thin film material 21 and the ring member constituting the safety device are made of a metal material and are joined by an appropriate method, so that the sealed structure may be destroyed by corrosion, thermal alteration, or the like. There are no advantages.
[0027]
According to the sealed battery of the present invention, the safety device includes a hole, a thin film material, and a ring member, and has an advantage that a simple structure can be obtained. Moreover, there exists an advantage which can manufacture a safety device with a simple manufacturing method.
[0028]
According to the sealed battery of the present invention, there is an advantage that the safety device can be easily designed and assembled and can be manufactured at low cost.
[Brief description of the drawings]
FIG. 1 is an assembly view of a sealed battery according to the present invention.
FIG. 2 is an assembly view of another example of a sealed battery according to the present invention.
FIG. 3 is a diagram showing a configuration example of a sealed battery safety device according to the present invention.
[Explanation of symbols]
11 Ring member 12 Hole 12A Projection 21 Thin film material 31 Casing 41 Lid or sealing plate 42 Hole 51 Bottom plate 52 Hole

Claims (7)

安全装置を有する密閉型電池において、
上記安全装置は、密閉されたケーシングに孔が設けられ、該孔がリング部材で周囲を補強された薄膜材によって封口されてなり、
上記リング部材は上記孔に対応した寸法の孔を有し、
上記薄膜材は、溝が不存在の薄膜材とされ、上記薄膜材の受圧面積は上記孔に一致されてなり、
上記ケーシング、リング部材、及び薄膜材は全てシーム溶接によって接合されていることを特徴とする密閉型電池。In a sealed battery having a safety device,
The safety device is provided with a hole in a sealed casing, and the hole is sealed with a thin film material whose periphery is reinforced by a ring member,
The ring member has a hole having a size corresponding to the hole,
The thin film material is a thin film material having no grooves, and the pressure receiving area of the thin film material is matched with the hole,
The casing, ring member, and thin film material are all joined by seam welding. 請求項１記載の密閉型電池において、上記ケーシングの孔は蓋部に設けられ、リング部材及び薄膜材は、電極と同一面上に離間された位置にあることを特徴とする密閉型電池。  2. The sealed battery according to claim 1, wherein the hole of the casing is provided in the lid portion, and the ring member and the thin film material are located on the same plane as the electrode. 請求項１記載の密閉型電池において、上記ケーシングの孔は底板に設けられていることを特徴とする密閉型電池。  2. The sealed battery according to claim 1, wherein the hole of the casing is provided in the bottom plate. 請求項１記載の密閉型電池において、上記リング部材を介して薄膜材とケーシングの間を接合した接合力が開裂圧力より大きいことを特徴とする密閉型電池。  2. The sealed battery according to claim 1, wherein a joining force obtained by joining the thin film material and the casing through the ring member is larger than a cleavage pressure. 請求項４又は５記載の密閉型電池において、上記リング状部材は中心方向に突出しかつ先端が尖った突起部を有することを特徴とする密閉型電池。  6. The sealed battery according to claim 4, wherein the ring-shaped member has a protrusion protruding in the center direction and having a sharp tip. 安全装置を有する密閉型電池の製造方法において、
上記安全装置は、密閉されたケーシングに孔を設け、該孔をリング部材で周囲を補強された薄膜材によって封口して作製し、
上記リング部材は上記孔に対応した寸法の孔を有し、
上記薄膜材は、溝が不存在の薄膜材であって、その受圧面積は上記孔に一致されてなり、
上記ケーシング、リング部材、及び薄膜材を全てシーム溶接によって接合することを含むことを特徴とする密閉型電池の製造方法。In a method for manufacturing a sealed battery having a safety device,
The safety device is prepared by providing a hole in a sealed casing and sealing the hole with a thin film material whose periphery is reinforced by a ring member.
The ring member has a hole having a size corresponding to the hole,
The thin film material is a thin film material having no grooves, and the pressure receiving area is matched with the hole,
A method of manufacturing a sealed battery, comprising joining all of the casing, the ring member, and the thin film material by seam welding. 請求項６記載の密閉型電池の製造方法において、上記リング部材を介して薄膜材とケーシングの間を接合した接合力を開裂圧力より大きくすることを特徴とする密閉型電池の製造方法。  7. The method for manufacturing a sealed battery according to claim 6, wherein a joining force for joining the thin film material and the casing through the ring member is larger than a cleavage pressure.
JP18734395A 1995-07-24 1995-07-24 Sealed battery Expired - Fee Related JP3738466B2 (en)

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Application Number Priority Date Filing Date Title
JP18734395A JP3738466B2 (en) 1995-07-24 1995-07-24 Sealed battery

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JPH0935699A JPH0935699A (en) 1997-02-07
JP3738466B2 true JP3738466B2 (en) 2006-01-25

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11111246A (en) * 1997-08-06 1999-04-23 Toshiba Corp Sealed battery and manufacture thereof
US6355372B2 (en) * 1997-11-21 2002-03-12 Sony Corporation Non-aqueous electrolyte secondary cell
US6190798B1 (en) 1998-01-09 2001-02-20 Kabushiki Kaisha Toshiba Sealed battery and method of manufacturing the same
JP2000182589A (en) * 1998-12-17 2000-06-30 Sanyo Electric Co Ltd Sealed-type battery and port sealing cover thereof
JP2002063886A (en) * 2000-06-06 2002-02-28 Fdk Corp Safety valve for sealed battery
US6887618B2 (en) * 2002-08-09 2005-05-03 The Gillette Company Electrochemical cell with flat casing and vent
CN109579718B (en) * 2019-01-09 2020-10-30 广州市顶丰自动化设备有限公司 Method and device for detecting welding seam parameters, computer equipment and storage medium

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