WO2015079672A1 - Cylindrical battery - Google Patents
Cylindrical battery Download PDFInfo
- Publication number
- WO2015079672A1 WO2015079672A1 PCT/JP2014/005880 JP2014005880W WO2015079672A1 WO 2015079672 A1 WO2015079672 A1 WO 2015079672A1 JP 2014005880 W JP2014005880 W JP 2014005880W WO 2015079672 A1 WO2015079672 A1 WO 2015079672A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery
- cylindrical battery
- current
- battery case
- pressure
- Prior art date
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 of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/20—Pressure-sensitive devices
-
- 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 cylindrical battery in which a wound electrode group is stored in a battery case.
- chargeable / dischargeable cylindrical batteries have high energy density, when overcharge occurs due to external short circuit or equipment failure, rapid gas generation occurs due to chemical reaction such as rapid charge / discharge reaction inside the battery. As a result, the battery case may expand or further rupture. Therefore, many cylindrical batteries are provided with a current interrupt mechanism that interrupts the energization current when the pressure in the battery reaches a predetermined value.
- the opening of the battery case is sealed using a sealing plate provided with a valve body that breaks when the pressure in the battery reaches a predetermined value.
- the valve body is broken, whereby the energization current is interrupted and the external short circuit or overcharge is not continued.
- the present invention has been made in view of the above problems, and its main object is to provide a cylindrical battery having an excellent safety with a current interruption mechanism that operates at a stable operating pressure without being influenced by atmospheric pressure. It is to provide.
- the present invention provides a cylindrical battery including a power generation element, a cylindrical battery case that houses the power generation element, and an assembly sealing body that seals an opening of the battery case.
- the sealing plate has a sealed space at least partially configured by a current interrupting mechanism.
- the present invention it is possible to provide a cylindrical battery with excellent safety, in which the current interruption mechanism operates reliably without being influenced by the atmospheric pressure when an abnormality such as overcharge occurs.
- FIG. 1 to 5 are diagrams showing the configuration of a cylindrical nonaqueous electrolyte secondary battery according to an embodiment of the present invention.
- FIG. 6 is a cross-sectional view of a sealing plate of a conventional cylindrical nonaqueous electrolyte secondary battery.
- an electrode group 20 in which a positive electrode 2 and a negative electrode 3 are wound through a separator (porous insulating layer) 4 has a bottomed cylindrical shape as a power generation element together with a non-aqueous electrolyte (not shown).
- the battery case 1 is housed.
- a ring-shaped upper insulating plate 8 and a lower insulating plate 9 are arranged above and below the electrode group 20, the positive electrode 2 is joined to the filter 14 via the positive electrode lead 6, and the negative electrode 3 is connected via the negative electrode lead 7.
- the filter 14 is joined to the current interruption mechanism 12 which is a metal valve plate. Further, the current interrupt mechanism 12 is connected to a terminal plate 11 that also serves as a positive terminal.
- the terminal plate 11, the current interruption mechanism 12, the inner gasket 13 as an insulator, and the filter 14 are integrated to form an assembly sealing plate 5, and the opening of the battery case 1 is sealed via the outer gasket 15. ing.
- the inner gasket 13 is disposed between the flat portion 12b of the current interrupting mechanism 12 and the filter caulking portion 14c of the filter 14 to prevent the flat portion 12b and the filter caulking portion 14c from contacting each other.
- the current interrupting mechanism 12 is formed with a diaphragm 12a that disconnects the joint with the filter 14 when the pressure in the battery rises and reaches a predetermined pressure (first operating pressure). There is a sealed space between the mechanism 12 and the terminal plate 11. With this configuration, when the pressure inside the battery reaches a predetermined pressure at the time of abnormality, the sealed space between the terminal plate 11 is not affected by the pressure change outside the battery due to atmospheric pressure, etc. A cylindrical battery that can cut off the current and has excellent safety can be realized. In addition, you may interrupt
- the volume of the sealed space is 3% or more and 20% or less of the volume other than the parts (including the electrolytic solution in the parts) in the space for storing the power generation element. If the volume of the sealed space is less than 3%, it is not preferable because it is difficult to produce an assembly sealing plate, and if the volume of the sealed space exceeds 20%, the battery capacity per volume is not preferable.
- a battery case thin portion 1a that is broken when the pressure in the battery reaches a predetermined value (second operating pressure) is formed on the bottom or side of the battery case 1, It is preferable that the safety valve is comprised by the battery case thin part 1a. It is preferable to provide the battery case thin portion 1a because gas can be exhausted to the outside of the battery and safety can be ensured when the pressure increases rapidly.
- the material of the current interrupting mechanism is preferably aluminum or an aluminum alloy
- the material of the terminal plate is preferably iron, nickel or a nickel alloy.
- Aluminum is excellent in drawability and weldability in parts processing, so it is suitable for thinning and diaphragms, has low resistance, and does not affect battery characteristics.
- Iron (including nickel-plated) and nickel are excellent in strength and resistant to external impact.
- the breaking pressure of the battery case thin portion 1a is formed so as to be larger than the pressure at which the joint between the diaphragm 12a and the filter 14 is cut off. That is, the second operating pressure is set higher than the first operating pressure.
- a temperature sensing type current interruption element (Positive Coefficient: PTC) may be interposed between the current interruption mechanism 12 and the terminal plate 11.
- first operating pressure and the second operating pressure are not uniquely determined, and may be appropriately determined in consideration of the type of battery used, an assumed gas generation mode (pressure increase mode), and the like. Good.
- the second operating pressure is set lower than the pressure resistance of the battery case (or the pressure resistance of the sealing plate), but is preferably set in the range of 2 to 8 MPa.
- the second operating pressure is set to less than 2 MPa, the case bottom thin portion may be broken only by the battery being subjected to some weak impact such as dropping, and the electrolyte may flow out from the inside of the battery.
- the second operating pressure is set to 8 MPa or more, the case bottom thin-walled portion may not be in time for the rapid gas generation, and the sealing portion may be deformed to cause rupture.
- the current interruption mechanism may be constituted by an upper valve plate 16 and a lower valve plate 17. If the current cut-off mechanism is composed of an upper valve plate and a lower valve plate, it can be broken due to thinning, and in general, the current can be supplied more stably than the current cut-off mechanism that cuts off joints such as welding like a diaphragm. Can be blocked.
- the terminal plate 11, the circular upper valve plate 16, the lower valve plate 17, the inner gasket 13, and the filter 14 are integrated to form the assembly sealing plate 5.
- the inner gasket 13 is disposed between the periphery of the upper valve plate 16 and the periphery of the lower valve plate 17 to prevent the periphery of the upper valve plate 16 and the periphery of the lower valve plate 17 from contacting each other. It is out.
- the upper valve plate 16 is formed with a circular inner portion 16a surrounded by an annular groove 16c at the center.
- the inner part 16a of the upper valve plate 16 is supported by an outer part 16b around the inner part 16a.
- the lower valve plate 17 has a circular inner portion 17a surrounded by an annular groove 17c formed at the center.
- the inner part 17a of the lower valve plate 17 is supported by an outer part 17b around the inner part 17a.
- the nonaqueous electrolyte secondary battery has been described as an example of the cylindrical battery.
- the present invention is not limited thereto, and examples thereof include a lead storage battery, a nickel cadmium secondary battery, a nickel hydrogen secondary battery, and an alkaline dry battery. It can also be applied to.
- the type of the non-aqueous electrolyte secondary battery is not particularly limited, and can be applied to, for example, a lithium ion secondary battery and a lithium primary battery.
- the cylindrical battery according to the present invention is suitably used for electronic devices such as personal computers and mobile phones, and electric power sources such as electric vehicles and electric tools.
Abstract
Provided is a cylindrical battery capable of, when the pressure inside the battery reaches a predetermined pressure value during the occurrence of an abnormality such as, for example, an external short-circuit, reliably cutting off the current by activating a current cutoff mechanism without being affected by an external environment such as, for example, atmospheric pressure and therefore excellent in safety.
The cylindrical battery includes a power generation element, a bottomed cylindrical battery case for housing the power generation element, and an assembly sealing plate for sealing the opening portion of the battery case, wherein the assembly sealing plate has a hermetic space, at least a part of which is constituted by a current cutoff mechanism.
Description
本発明は、捲回された電極群が電池ケース内に収納された円筒形電池に関する。
The present invention relates to a cylindrical battery in which a wound electrode group is stored in a battery case.
充放電可能な円筒形電池は、エネルギー密度が高いため、外部短絡あるいは機器の故障による過充電が発生した場合、電池内部で急激な充放電反応等の化学反応により急激なガス発生が起こり、これにより、電池ケースが膨張したり、さらには破裂するおそれがある。そのため、多くの円筒形電池には、電池内の圧力が所定値に達すると、通電電流を遮断する電流遮断機構が設けられている。
Since chargeable / dischargeable cylindrical batteries have high energy density, when overcharge occurs due to external short circuit or equipment failure, rapid gas generation occurs due to chemical reaction such as rapid charge / discharge reaction inside the battery. As a result, the battery case may expand or further rupture. Therefore, many cylindrical batteries are provided with a current interrupt mechanism that interrupts the energization current when the pressure in the battery reaches a predetermined value.
円筒形電池に設けられる電流遮断機構としては、電池内の圧力が所定値に達したときに破断する弁体を備えた封口板を用いて電池ケースの開口部を密閉した構造のものがある。この構造の機構では、電池内が所定の圧力に達したとき、弁体が破断することにより、通電電流が遮断され、外部短絡や過充電が継続されなくなる。
As the current interruption mechanism provided in the cylindrical battery, there is a structure in which the opening of the battery case is sealed using a sealing plate provided with a valve body that breaks when the pressure in the battery reaches a predetermined value. In the mechanism of this structure, when the inside of the battery reaches a predetermined pressure, the valve body is broken, whereby the energization current is interrupted and the external short circuit or overcharge is not continued.
しかしながら、図６に示すように、特許文献１に記載された電流遮断機構では、電池キャップの通気孔が電池外部に対して開口しているため、電流遮断機構の作動圧が大気圧により左右されてしまう。
However, as shown in FIG. 6, in the current interruption mechanism described in Patent Document 1, since the battery cap vent hole is open to the outside of the battery, the operating pressure of the current interruption mechanism depends on the atmospheric pressure. End up.
そのため、異常時における電池内部のガス発生量に関わらず、安定して所定の電池内圧で安全弁を作動させることが困難となり、過充電などの異常時に正確に電流遮断機構が作動しないおそれがある。
Therefore, regardless of the amount of gas generated inside the battery at the time of abnormality, it becomes difficult to stably operate the safety valve at a predetermined battery internal pressure, and there is a possibility that the current interruption mechanism does not operate correctly at the time of abnormality such as overcharge.
さらに、電流遮断機構が作動した場合において、電池内部に存在する電解液が液状で通気孔を通過してパック内部へ浸透し、パック基板を損傷させてしまうおそれもある。
Furthermore, when the current interruption mechanism is activated, there is a possibility that the electrolyte present in the battery is liquid and passes through the vent and penetrates into the pack, thereby damaging the pack substrate.
本発明は、かかる課題に鑑みなされたもので、その主な目的は、大気圧に左右されることなく、安定した動作圧力で作動する電流遮断機構を備え、安全性に優れた円筒形電池を提供することにある。
The present invention has been made in view of the above problems, and its main object is to provide a cylindrical battery having an excellent safety with a current interruption mechanism that operates at a stable operating pressure without being influenced by atmospheric pressure. It is to provide.
上記課題を解決するために、本発明は、発電要素と、発電要素を収納する円筒形の電池ケースと、電池ケースの開口部を封口する組立封口体とを含む円筒形電池であって、組立封口板が、少なくとも一部を電流遮断機構で構成された密閉空間を有する。
In order to solve the above problems, the present invention provides a cylindrical battery including a power generation element, a cylindrical battery case that houses the power generation element, and an assembly sealing body that seals an opening of the battery case. The sealing plate has a sealed space at least partially configured by a current interrupting mechanism.
本発明によれば、過充電などの異常時に電流遮断機構が大気の圧力に左右されることなく確実に動作し、安全性に優れた円筒形電池を提供することができる。
According to the present invention, it is possible to provide a cylindrical battery with excellent safety, in which the current interruption mechanism operates reliably without being influenced by the atmospheric pressure when an abnormality such as overcharge occurs.
以下、本発明の実施形態を図面に基づいて詳細に説明する。なお、本発明は、以下の実施形態に限定されるものではない。また、本発明の効果を奏する範囲を逸脱しない範囲で、適宜変更は可能である。さらに、他の実施形態との組み合わせも可能である。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment. Moreover, it can change suitably in the range which does not deviate from the range which has the effect of this invention. Furthermore, combinations with other embodiments are possible.
図１～図５は、本発明の一実施形態における円筒形非水電解質二次電池の構成を示した図である。また、図６は、従来の円筒形非水電解質二次電池の封口板の断面図である。
1 to 5 are diagrams showing the configuration of a cylindrical nonaqueous electrolyte secondary battery according to an embodiment of the present invention. FIG. 6 is a cross-sectional view of a sealing plate of a conventional cylindrical nonaqueous electrolyte secondary battery.
図１に示すように、正極２及び負極３がセパレータ（多孔質絶縁層）４を介して捲回された電極群２０が、非水電解液（不図示）とともに、発電要素として有底円筒形の電池ケース１に収納されている。電極群２０の上下には、それぞれリング状の上部絶縁板８、下部絶縁板９が配置され、正極２は、正極リード６を介してフィルタ１４に接合され、負極３は、負極リード７を介して負極端子を兼ねる電池ケース１の底部に接合されている。
As shown in FIG. 1, an electrode group 20 in which a positive electrode 2 and a negative electrode 3 are wound through a separator (porous insulating layer) 4 has a bottomed cylindrical shape as a power generation element together with a non-aqueous electrolyte (not shown). The battery case 1 is housed. A ring-shaped upper insulating plate 8 and a lower insulating plate 9 are arranged above and below the electrode group 20, the positive electrode 2 is joined to the filter 14 via the positive electrode lead 6, and the negative electrode 3 is connected via the negative electrode lead 7. Are joined to the bottom of the battery case 1 which also serves as a negative electrode terminal.
フィルタ１４は、金属製の弁板である電流遮断機構１２に接合されている。さらに、電流遮断機構１２は、正極端子を兼ねる端子板１１に接続されている。そして、端子板１１、電流遮断機構１２、絶縁体であるインナーガスケット１３、フィルタ１４が一体となって、組立封口板５が構成され、アウターガスケット１５を介して電池ケース１の開口部を封口している。インナーガスケット１３は電流遮断機構１２の平坦部１２ｂとフィルタ１４のフィルタかしめ部１４ｃとの間に配設されて、平坦部１２ｂとフィルタかしめ部１４ｃとが接触するのを防いでいる。
The filter 14 is joined to the current interruption mechanism 12 which is a metal valve plate. Further, the current interrupt mechanism 12 is connected to a terminal plate 11 that also serves as a positive terminal. The terminal plate 11, the current interruption mechanism 12, the inner gasket 13 as an insulator, and the filter 14 are integrated to form an assembly sealing plate 5, and the opening of the battery case 1 is sealed via the outer gasket 15. ing. The inner gasket 13 is disposed between the flat portion 12b of the current interrupting mechanism 12 and the filter caulking portion 14c of the filter 14 to prevent the flat portion 12b and the filter caulking portion 14c from contacting each other.
電流遮断機構１２には、電池内の圧力が上昇し、所定の圧力（第１の作動圧）に達したときに、フィルタ１４との接合部が切り離されるダイヤフラム１２ａが形成されており、電流遮断機構１２と端子板１１との間には密閉空間を有している。この構成により、異常時に、電池内の圧力が所定の圧力に達するときには、端子板１１との間の密閉空間により、気圧等による電池外の圧力変化の影響を受けることなく、安定した動作圧力で電流を遮断することができ、安全性に優れた円筒形電池を実現することができる。なお、ダイヤフラム１２ａが破断することにより電流を遮断してもよい。
The current interrupting mechanism 12 is formed with a diaphragm 12a that disconnects the joint with the filter 14 when the pressure in the battery rises and reaches a predetermined pressure (first operating pressure). There is a sealed space between the mechanism 12 and the terminal plate 11. With this configuration, when the pressure inside the battery reaches a predetermined pressure at the time of abnormality, the sealed space between the terminal plate 11 is not affected by the pressure change outside the battery due to atmospheric pressure, etc. A cylindrical battery that can cut off the current and has excellent safety can be realized. In addition, you may interrupt | block an electric current by the diaphragm 12a breaking.
さらに、密閉空間の体積が、発電要素を収納する空間における部品以外（電解液も部品に含む）の体積の３％以上、２０％以下であることが好ましい。密閉空間の体積が３％未満であると、組立封口板の作製が困難となるため好ましくなく、密閉空間の体積が２０％を超えると体積当りの電池容量が少なくなり好ましくない。
Furthermore, it is preferable that the volume of the sealed space is 3% or more and 20% or less of the volume other than the parts (including the electrolytic solution in the parts) in the space for storing the power generation element. If the volume of the sealed space is less than 3%, it is not preferable because it is difficult to produce an assembly sealing plate, and if the volume of the sealed space exceeds 20%, the battery capacity per volume is not preferable.
さらに、図３に示すように、電池ケース１の底部または側部には、電池内の圧力が所定値（第２の作動圧）に達したときに破断する電池ケース薄肉部１ａが形成され、電池ケース薄肉部１ａで安全弁が構成されていることが好ましい。電池ケース薄肉部１ａを設けていると、急激な圧力上昇時に、電池外にガスを排気でき安全性を確保できるため好ましい。
Further, as shown in FIG. 3, a battery case thin portion 1a that is broken when the pressure in the battery reaches a predetermined value (second operating pressure) is formed on the bottom or side of the battery case 1, It is preferable that the safety valve is comprised by the battery case thin part 1a. It is preferable to provide the battery case thin portion 1a because gas can be exhausted to the outside of the battery and safety can be ensured when the pressure increases rapidly.
さらに、電流遮断機構の材質は、アルミニウムまたはアルミニウム合金であることが好ましく、端子板の材質は、鉄、ニッケルまたはニッケル合金であることが好ましい。アルミニウムは部品加工において、絞り性、溶接性に優れているため、薄肉化やダイヤフラムに適しており、また抵抗が低く、電池特性に影響が出ない。また、鉄（ニッケルメッキしたものを含む）やニッケルは強度に優れ、外的衝撃に強い。
Furthermore, the material of the current interrupting mechanism is preferably aluminum or an aluminum alloy, and the material of the terminal plate is preferably iron, nickel or a nickel alloy. Aluminum is excellent in drawability and weldability in parts processing, so it is suitable for thinning and diaphragms, has low resistance, and does not affect battery characteristics. Iron (including nickel-plated) and nickel are excellent in strength and resistant to external impact.
ここで、電池ケース薄肉部１ａの破断圧力は、ダイヤフラム１２ａとフィルタ１４との接合部が切り離される圧力よりも大きくなるように形成されている。すなわち、第２の作動圧は、第１の作動圧よりも高く設定されている。
Here, the breaking pressure of the battery case thin portion 1a is formed so as to be larger than the pressure at which the joint between the diaphragm 12a and the filter 14 is cut off. That is, the second operating pressure is set higher than the first operating pressure.
また、組立封口板５において、電流遮断機構１２と端子板１１との間に、温度感知型の電流遮断素子（Positive Temperature Coefficient：ＰＴＣ）を介しても良い。
Further, in the assembly sealing plate 5, a temperature sensing type current interruption element (Positive Coefficient: PTC) may be interposed between the current interruption mechanism 12 and the terminal plate 11.
また、第１の作動圧及び第２の作動圧は、一義的に決まるものではなく、使用する電池の種類や、想定されるガス発生モード（圧力上昇モード）等を考慮して、適宜決めればよい。
In addition, the first operating pressure and the second operating pressure are not uniquely determined, and may be appropriately determined in consideration of the type of battery used, an assumed gas generation mode (pressure increase mode), and the like. Good.
なお、第２の作動圧は、電池ケースの耐圧（若しくは、封口板の耐圧）よりも低く設定されるが、２～８ＭＰａの範囲に設定することが好ましい。第２の作動圧を２ＭＰａ未満に設定した場合、電池が落下等の何らかの弱い衝撃を受けただけで、ケース底部薄肉部が破断し、電池内部から電解液が流出する恐れがある。また、第２の作動圧を８ＭＰａ以上に設定した場合、急激なガス発生に対してケース底部薄肉部破断が間に合わず封口部が変形して破裂が発生する恐れがあるからである。
The second operating pressure is set lower than the pressure resistance of the battery case (or the pressure resistance of the sealing plate), but is preferably set in the range of 2 to 8 MPa. When the second operating pressure is set to less than 2 MPa, the case bottom thin portion may be broken only by the battery being subjected to some weak impact such as dropping, and the electrolyte may flow out from the inside of the battery. In addition, when the second operating pressure is set to 8 MPa or more, the case bottom thin-walled portion may not be in time for the rapid gas generation, and the sealing portion may be deformed to cause rupture.
また、図４に示すように、電流遮断機構が上部弁板１６と下部弁板１７とで構成されてもよい。電流遮断機構が上部弁板と下部弁板とで構成されると薄肉化による破断が可能であり、一般的にダイヤフラムのような溶接などの接合を切り離す電流遮断機構よりも更に安定して電流を遮断することができる。
Further, as shown in FIG. 4, the current interruption mechanism may be constituted by an upper valve plate 16 and a lower valve plate 17. If the current cut-off mechanism is composed of an upper valve plate and a lower valve plate, it can be broken due to thinning, and in general, the current can be supplied more stably than the current cut-off mechanism that cuts off joints such as welding like a diaphragm. Can be blocked.
端子板１１、円形の上部弁板１６および下部弁板１７、インナーガスケット１３、フィルタ１４が一体となって、組立封口板５が構成される。インナーガスケット１３は上部弁板１６の周辺部と下部弁板１７の周辺部との間に配設されて、上部弁板１６の周辺部と下部弁板１７の周辺部とが接触するのを防いでいる。
The terminal plate 11, the circular upper valve plate 16, the lower valve plate 17, the inner gasket 13, and the filter 14 are integrated to form the assembly sealing plate 5. The inner gasket 13 is disposed between the periphery of the upper valve plate 16 and the periphery of the lower valve plate 17 to prevent the periphery of the upper valve plate 16 and the periphery of the lower valve plate 17 from contacting each other. It is out.
上部弁板１６は、環状の溝１６ｃにより囲われた円形の内側部１６ａが中央部に形成されている。上部弁板１６の内側部１６ａは、内側部１６ａの周囲の外側部１６ｂにより支持されている。
The upper valve plate 16 is formed with a circular inner portion 16a surrounded by an annular groove 16c at the center. The inner part 16a of the upper valve plate 16 is supported by an outer part 16b around the inner part 16a.
一方、下部弁板１７は、環状の溝１７ｃにより囲われた円形の内側部１７ａが中央部に形成されている。下部弁板１７の内側部１７ａは、内側部１７ａの周囲の外側部１７ｂにより支持されている。
On the other hand, the lower valve plate 17 has a circular inner portion 17a surrounded by an annular groove 17c formed at the center. The inner part 17a of the lower valve plate 17 is supported by an outer part 17b around the inner part 17a.
そして、図５に示すように、電池内の圧力が所定の圧力に達すると下部弁板１７の内側部１７ａが破断し、電流を遮断することができる。
Then, as shown in FIG. 5, when the pressure in the battery reaches a predetermined pressure, the inner portion 17a of the lower valve plate 17 is broken, and the current can be cut off.
以上、本発明を好適な実施形態により説明してきたが、こうした記述は限定事項ではなく、もちろん、種々の改変が可能である。例えば、上記実施形態においては、円筒形電池として非水電解質二次電池を例に説明したが、これに限らず、例えば、鉛蓄電池、ニッケルカドミウム二次電池、ニッケル水素二次電池、アルカリ乾電池等にも適用することができる。また、非水電解質二次電池も、その種類は特に限定されず、例えば、リチウムイオン二次電池、リチウム一次電池に適用することができる。
As mentioned above, although this invention has been demonstrated by suitable embodiment, such description is not a limitation matter and of course various modifications are possible. For example, in the above-described embodiment, the nonaqueous electrolyte secondary battery has been described as an example of the cylindrical battery. However, the present invention is not limited thereto, and examples thereof include a lead storage battery, a nickel cadmium secondary battery, a nickel hydrogen secondary battery, and an alkaline dry battery. It can also be applied to. The type of the non-aqueous electrolyte secondary battery is not particularly limited, and can be applied to, for example, a lithium ion secondary battery and a lithium primary battery.
本発明による円筒形電池は、パーソナルコンピュータ、携帯電話等の電子機器や、電気自動車や電動工具等の電源に好適に用いられる。
The cylindrical battery according to the present invention is suitably used for electronic devices such as personal computers and mobile phones, and electric power sources such as electric vehicles and electric tools.
１ 電池ケース
１ａ 電池ケース薄肉部
２ 正極
２ａ 正極集電体
２ｂ 正極活物質
３ 負極
３ａ 負極集電体
３ｂ 負極活物質
４ セパレータ
５ 組立封口板
６ 正極リード
７ 負極リード
８ 上部絶縁板
９ 下部絶縁板
１０ 円筒形電池
１１ 端子板
１２ 電流遮断機構
１２ａ ダイヤフラム
１２ｂ 平坦部
１３ インナーガスケット
１４ フィルタ
１４ａ フィルタ底板
１４ｂ フィルタ通気孔
１４ｃ フィルタかしめ部
１５ アウターガスケット
１６ 上部弁板
１７ 下部弁板
２０ 電極群
１０１ 上部金属箔
１０２ 下部金属箔
１０３ 絶縁ガスケット
１０４ ＰＴＣ（Positive Temperature Coefficient）素子
１０５ 通気孔
１０６ キャップ
１０７ 通気孔
１０８ 金属ケース
１０９、１１０ 易破断部
１１１ 溶接部
DESCRIPTION OFSYMBOLS 1 Battery case 1a Battery case thin part 2 Positive electrode 2a Positive electrode collector 2b Positive electrode active material 3 Negative electrode 3a Negative electrode collector 3b Negative electrode active material 4 Separator 5 Assembly sealing board 6 Positive electrode lead 7 Negative electrode lead 8 Upper insulating plate 9 Lower insulating plate DESCRIPTION OF SYMBOLS 10 Cylindrical battery 11 Terminal board 12 Current interruption mechanism 12a Diaphragm 12b Flat part 13 Inner gasket 14 Filter 14a Filter bottom plate 14b Filter ventilation hole 14c Filter caulking part 15 Outer gasket 16 Upper valve plate 17 Lower valve plate 20 Electrode group 101 Upper metal foil 102 Lower metal foil 103 Insulating gasket 104 PTC (Positive Temperature Coefficient) element 105 Vent hole 106 Cap 107 Vent hole 108 Metal case 109, 110 Easy breakable part 111 Welded part
１ａ 電池ケース薄肉部
２ 正極
２ａ 正極集電体
２ｂ 正極活物質
３ 負極
３ａ 負極集電体
３ｂ 負極活物質
４ セパレータ
５ 組立封口板
６ 正極リード
７ 負極リード
８ 上部絶縁板
９ 下部絶縁板
１０ 円筒形電池
１１ 端子板
１２ 電流遮断機構
１２ａ ダイヤフラム
１２ｂ 平坦部
１３ インナーガスケット
１４ フィルタ
１４ａ フィルタ底板
１４ｂ フィルタ通気孔
１４ｃ フィルタかしめ部
１５ アウターガスケット
１６ 上部弁板
１７ 下部弁板
２０ 電極群
１０１ 上部金属箔
１０２ 下部金属箔
１０３ 絶縁ガスケット
１０４ ＰＴＣ（Positive Temperature Coefficient）素子
１０５ 通気孔
１０６ キャップ
１０７ 通気孔
１０８ 金属ケース
１０９、１１０ 易破断部
１１１ 溶接部
DESCRIPTION OF
Claims (5)
- 発電要素と、前記発電要素を収納する有底円筒形の電池ケースと、前記電池ケースの開口部を封口する組立封口板とを含む円筒形電池であって、前記組立封口板が、少なくとも一部を電流遮断機構で構成された密閉空間を有する円筒形電池。 A cylindrical battery including a power generation element, a bottomed cylindrical battery case that houses the power generation element, and an assembly sealing plate that seals an opening of the battery case, wherein the assembly sealing plate is at least partially A cylindrical battery having a sealed space constituted by a current interruption mechanism.
- 前記密閉空間が、少なくとも前記電流遮断機構と、端子板とで囲まれている請求項１に記載の円筒形電池。 The cylindrical battery according to claim 1, wherein the sealed space is surrounded by at least the current interrupt mechanism and a terminal plate.
- 前記密閉空間の体積は、前記発電要素を収納する空間における部品以外の体積の３％以上、２０％以下である請求項１に記載の円筒形電池。 2. The cylindrical battery according to claim 1, wherein a volume of the sealed space is 3% or more and 20% or less of a volume other than components in a space in which the power generation element is stored.
- 前記電池ケースの底部または側部に安全弁が設けられている請求項１に記載の円筒形電池。 The cylindrical battery according to claim 1, wherein a safety valve is provided at the bottom or side of the battery case.
- 前記電流遮断機構の材質はアルミニウムまたはアルミニウム合金であり、前記端子板の材質は鉄またはニッケルまたはニッケル合金である請求項２に記載の円筒形電池。
3. The cylindrical battery according to claim 2, wherein a material of the current interrupt mechanism is aluminum or an aluminum alloy, and a material of the terminal plate is iron, nickel, or a nickel alloy.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013247141 | 2013-11-29 | ||
| JP2013-247141 | 2013-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015079672A1 true WO2015079672A1 (en) | 2015-06-04 |
Family
ID=53198639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2014/005880 WO2015079672A1 (en) | 2013-11-29 | 2014-11-25 | Cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2015079672A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016121319A1 (en) * | 2015-01-30 | 2016-08-04 | 三洋電機株式会社 | Cylindrical nonaqueous electrolyte secondary battery |
| CN105977411A (en) * | 2016-06-27 | 2016-09-28 | 宁德时代新能源科技股份有限公司 | Secondary cell top cap and secondary cell |
| JP2017059526A (en) * | 2015-09-16 | 2017-03-23 | パナソニック株式会社 | Nonaqueous electrolyte secondary battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60155174U (en) * | 1984-03-24 | 1985-10-16 | 日本電池株式会社 | Sealed cylindrical alkaline storage battery |
| JP2004063254A (en) * | 2002-07-29 | 2004-02-26 | Sanyo Electric Co Ltd | Sealed type battery |
| JP2008027668A (en) * | 2006-07-19 | 2008-02-07 | Sony Corp | Battery |
-
2014
- 2014-11-25 WO PCT/JP2014/005880 patent/WO2015079672A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60155174U (en) * | 1984-03-24 | 1985-10-16 | 日本電池株式会社 | Sealed cylindrical alkaline storage battery |
| JP2004063254A (en) * | 2002-07-29 | 2004-02-26 | Sanyo Electric Co Ltd | Sealed type battery |
| JP2008027668A (en) * | 2006-07-19 | 2008-02-07 | Sony Corp | Battery |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016121319A1 (en) * | 2015-01-30 | 2016-08-04 | 三洋電機株式会社 | Cylindrical nonaqueous electrolyte secondary battery |
| JP2017059526A (en) * | 2015-09-16 | 2017-03-23 | パナソニック株式会社 | Nonaqueous electrolyte secondary battery |
| US10535860B2 (en) | 2015-09-16 | 2020-01-14 | Panasonic Corporation | Nonaqueous electrolyte secondary battery |
| CN105977411A (en) * | 2016-06-27 | 2016-09-28 | 宁德时代新能源科技股份有限公司 | Secondary cell top cap and secondary cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8802256B2 (en) | Safety device for a sealed cell | |
| KR101627626B1 (en) | Rechargeable battery | |
| JP5517974B2 (en) | Secondary battery | |
| KR101768656B1 (en) | Cap assembly and secondary battery including the same | |
| US8871369B2 (en) | Hermetic battery | |
| EP1422771A1 (en) | Non-aqueous electrolytic secondary battery | |
| JP5507623B2 (en) | Nonaqueous electrolyte secondary battery | |
| KR101310731B1 (en) | Secondary battery | |
| CN106887539B (en) | Sealed battery, sealing body, and electric vehicle | |
| KR20180005455A (en) | Cap assembly and secondary battery using the same | |
| JP4806936B2 (en) | Sealed battery | |
| KR101293208B1 (en) | Cap assembly for secondary battery | |
| WO2015079672A1 (en) | Cylindrical battery | |
| KR101484099B1 (en) | Secondary battery | |
| JP2006066269A (en) | Sealed-type storage battery | |
| KR101121205B1 (en) | Secondary battery | |
| WO2015068353A1 (en) | Stopper for sealed battery, and sealed battery | |
| JP2017162570A (en) | Power storage element | |
| JP5152098B2 (en) | Sealed secondary battery | |
| JPH10247483A (en) | Safety structure of sealed battery | |
| JP2007227283A (en) | Sealed battery | |
| KR102335696B1 (en) | The Current Interrupt Device And The Cap Assembly | |
| JP2013062113A (en) | Secondary battery and assembled battery using the same | |
| JP2015099735A (en) | Power storage device | |
| KR20140097082A (en) | Secondary battery |
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: 14865088 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 14865088 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: JP |