JP2007066616A - Non-aqueous electrolytic liquid battery - Google Patents

Non-aqueous electrolytic liquid battery Download PDF

Info

Publication number
JP2007066616A
JP2007066616A JP2005249378A JP2005249378A JP2007066616A JP 2007066616 A JP2007066616 A JP 2007066616A JP 2005249378 A JP2005249378 A JP 2005249378A JP 2005249378 A JP2005249378 A JP 2005249378A JP 2007066616 A JP2007066616 A JP 2007066616A
Authority
JP
Japan
Prior art keywords
positive electrode
electrode lead
battery
components
composition
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2005249378A
Other languages
Japanese (ja)
Inventor
Kenta Yamamoto
賢太 山本
Ryosuke Takagi
良介 高木
Naoko Yamakawa
直子 山川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP2005249378A priority Critical patent/JP2007066616A/en
Publication of JP2007066616A publication Critical patent/JP2007066616A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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

Landscapes

  • Gas Exhaust Devices For Batteries (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Primary Cells (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-aqueous electrolytic liquid battery capable of preventing abnormal heat generation due to misuse, without installing a constituent component as a misuse countermeasure. <P>SOLUTION: A positive electrode lead 10, for example, comprising a low melting point material is connected to a positive electrode 2. The positive electrode lead 10 is connected electrically to a battery lid 7 by being welded to a safety valve 8. The low melting point material is used as a material of the positive electrode lead 10. Thereby, abnormal heat generation due to misuse can be prevented. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、非水電解液電池、例えば二硫化鉄を正極活物質とする正極と、リチウムを負極活物質とする負極と、有機溶媒に電解質を溶解した電解液とからなるリチウム／二硫化鉄一次電池に関する。   The present invention relates to a non-aqueous electrolyte battery, for example, a lithium / iron disulfide comprising a positive electrode using iron disulfide as a positive electrode active material, a negative electrode using lithium as a negative electrode active material, and an electrolytic solution in which an electrolyte is dissolved in an organic solvent. The present invention relates to a primary battery.

現在、市販されている１．５Ｖ級一次電池には、水溶液を電解液に用いるマンガン電池、アルカリマンガン電池、酸化銀電池、空気電池、ニッケル/亜鉛電池、および有機溶媒を電解液に用いるリチウム/二硫化鉄一次電池等がある。   Currently, commercially available 1.5V class primary batteries include manganese batteries, alkaline manganese batteries, silver oxide batteries, air batteries, nickel / zinc batteries, and lithium / organic solvents that use organic solvents as the electrolyte. There are iron disulfide primary batteries.

リチウム/二硫化鉄一次電池は、正極活物質の二硫化鉄が約８９４ｍＡｈ／ｇ、負極活物質のリチウムが約３８６３ｍＡｈ／ｇと、既存の電池材料の中でも高い理論容量を示す材料から構成されており、高容量を実現できる。さらに、リチウム/二硫化鉄一次電池は、負荷特性、低温特性等の電池特性の面からも、他の１．５Ｖ級一次電池とは一線を隔する極めて優れた電池である。   The lithium / iron disulfide primary battery is made of a material having a high theoretical capacity among the existing battery materials, with about 894 mAh / g of the positive electrode active material iron disulfide and about 3863 mAh / g of the negative electrode active material lithium. High capacity can be realized. Furthermore, the lithium / iron disulfide primary battery is an extremely excellent battery that is different from other 1.5 V class primary batteries in terms of battery characteristics such as load characteristics and low temperature characteristics.

しかしながら、リチウム／二硫化鉄一次電池は、負極として金属リチウムを、電解液として有機溶媒を用いるために、例えば、充電、外部短絡、多本数使用の機器に対して逆奏填する等の誤使用を行った場合は、極めて大きな電流が流れ、これに伴い電池が異常発熱する。電池が異常発熱すると、電池の破裂、熱暴走を引き起こすおそれがある。   However, since lithium / iron disulfide primary batteries use metallic lithium as a negative electrode and an organic solvent as an electrolyte solution, for example, charging, external short-circuiting, reverse use against multiple-use devices, etc. When the battery is used, a very large current flows, and the battery abnormally generates heat. Abnormal heat generation of the battery may cause battery rupture or thermal runaway.

誤使用による電池の破裂、熱暴走を防止するための対策としては、例えば下記特許文献１に記載されているように、電池構成部材中に熱感抵抗素子（Positive Temperature Coefficient；PTC素子）を設けることが提案されている。   As measures for preventing battery rupture and thermal runaway due to misuse, for example, as described in Patent Document 1, a thermal resistance element (Positive Temperature Coefficient; PTC element) is provided in a battery component. It has been proposed.

特開平１０−２１４６１３号公報Japanese Patent Laid-Open No. 10-214613

熱感抵抗素子は、電池が異常発熱すると、その熱によって抵抗が増大し、熱暴走の原因となる大電流の通電を抑制する機能を有しており、リチウム／二硫化鉄一次電池以外にも、例えばリチウムイオン二次電池等に対して一般的に使用されるものである。   The thermal resistance element has a function to suppress energization of a large current that causes thermal runaway when the battery abnormally generates heat, and has the function of suppressing the energization of the battery other than the lithium / iron disulfide primary battery. For example, it is generally used for lithium ion secondary batteries.

しかしながら、誤使用による異常発熱を防止するために、誤使用対策としての構成部品である熱感抵抗素子が設けられると、電池の構成部品が増加し、製造コストの増加、電池の小型化の妨げとなる問題があった。   However, in order to prevent abnormal heat generation due to misuse, if a thermal resistance element, which is a component as a countermeasure against misuse, is provided, the number of battery components increases, which increases manufacturing costs and hinders downsizing of the battery. There was a problem.

したがって、この発明の目的は、誤使用対策としての構成部品を設けることなく、誤使用による異常発熱を防止できる非水電解液電池を提供することにある。   Accordingly, an object of the present invention is to provide a non-aqueous electrolyte battery capable of preventing abnormal heat generation due to misuse without providing a component as a countermeasure against misuse.

本願発明者等は、誤使用による異常発熱を防止できる安全機構を開発するために鋭意検討を続けてきた。その結果、低融点材料からなる正極リードを用いることによって、誤使用による異常発熱を防止できることを知見し、この発明を完成するに至った。   The inventors of the present application have been intensively studied in order to develop a safety mechanism that can prevent abnormal heat generation due to misuse. As a result, the inventors have found that by using a positive electrode lead made of a low melting point material, abnormal heat generation due to misuse can be prevented, and the present invention has been completed.

すなわち、上述した課題を解決するために、この発明は、
正極集電体に正極リードが接続され、
正極リードの材料である正極リード材料が低融点金属材料であることを特徴とする非水電解液電池である。 That is, in order to solve the above-described problem, the present invention
The positive electrode lead is connected to the positive electrode current collector,
The non-aqueous electrolyte battery is characterized in that the positive electrode lead material, which is the material of the positive electrode lead, is a low melting point metal material.

この発明によれば、誤使用対策としての構成部品を設けることなく、誤使用による異常発熱を防止できる。   According to the present invention, abnormal heat generation due to misuse can be prevented without providing a component as a countermeasure against misuse.

以下、この発明の実施の形態について図面を参照して説明する。図１は、この発明の一実施形態によるリチウム／二硫化鉄一次電池の構成の一例を示す。この電池は、正極端子側内部に配置される安全弁８と、正極リード１０とが直接溶接された電池構造である。   Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of the configuration of a lithium / iron disulfide primary battery according to an embodiment of the present invention. This battery has a battery structure in which a safety valve 8 disposed inside a positive electrode terminal and a positive electrode lead 10 are directly welded.

図１に示すように、ほぼ中空円柱状の電池缶１の内部に、渦巻型電極体を有する。この渦巻型電極体は、正極活物質を含む正極合剤を、例えばＣｕ（銅）電極箔に塗布されてなる帯状の正極２と、負極活物質である例えばリチウム金属からなる帯状の負極３とが、イオン透過性を有するセパレータ４を介して多数回巻回されてなる。   As shown in FIG. 1, a spiral electrode body is provided inside a substantially hollow cylindrical battery can 1. In this spiral electrode body, a positive electrode mixture containing a positive electrode active material is applied to, for example, a Cu (copper) electrode foil, and a belt-like positive electrode 2 made of, for example, lithium metal that is a negative electrode active material. Is wound many times through the separator 4 having ion permeability.

電池缶１は、例えばＮｉ（ニッケル）めっきが施された鉄により構成されており、一端部が閉鎖され、他端部が開放されている。また、電池缶１の内部には、渦巻型電極体を挟み込むように周面に対して垂直に一対の絶縁板５，６がそれぞれ配置されている。   The battery can 1 is made of, for example, iron plated with Ni (nickel), and has one end closed and the other end open. In addition, a pair of insulating plates 5 and 6 are arranged inside the battery can 1 perpendicular to the peripheral surface so as to sandwich the spiral electrode body.

電池缶１の開放端部には、電池蓋７と、この電池蓋７の内側に設けられた安全弁８が、封口ガスケット９を介してかしめられることにより取り付けられており、電池缶１の内部が密閉される。電池蓋７は、例えば電池缶１と同様の材料により構成されている。   A battery lid 7 and a safety valve 8 provided on the inner side of the battery lid 7 are attached to the open end of the battery can 1 by caulking through a sealing gasket 9. Sealed. The battery lid 7 is made of, for example, the same material as the battery can 1.

安全弁８は、電池蓋７と電気的に接続されており、外部からの加熱等がなされ、電池の内圧が一定以上となった場合に、電池内部のガスを、弁作動で外部に放出することによって、電池の破裂を防止する機構を備えている。封口ガスケット９は、例えば絶縁材料により構成されており、表面には、例えばアスファルトが塗布されている。   The safety valve 8 is electrically connected to the battery lid 7, and when the internal pressure of the battery exceeds a certain level due to external heating or the like, the gas inside the battery is released to the outside by the valve operation. Thus, a mechanism for preventing the battery from bursting is provided. The sealing gasket 9 is made of, for example, an insulating material, and the surface thereof is coated with, for example, asphalt.

正極２には、例えば、低融点材料よりなる正極リード１０が接続されている。負極３には、例えばニッケル等よりなる負極リード１１が接続されている。正極リード１０は、安全弁８に溶接されることによって、電池蓋７と電気的に接続される。負極リード１１は、電池缶１に溶接されることによって、電気的に接続される。   For example, a positive electrode lead 10 made of a low melting point material is connected to the positive electrode 2. A negative electrode lead 11 made of, for example, nickel is connected to the negative electrode 3. The positive electrode lead 10 is electrically connected to the battery lid 7 by being welded to the safety valve 8. The negative electrode lead 11 is electrically connected to the battery can 1 by welding.

また、正極２と負極３との間のセパレータ４には、非水電解質として例えば非水電解液が含浸されている。セパレータ４は、正極２と負極３との間に配されることによって、これらの物理的接触を防止する機能を有する。   In addition, the separator 4 between the positive electrode 2 and the negative electrode 3 is impregnated with, for example, a non-aqueous electrolyte as a non-aqueous electrolyte. The separator 4 is disposed between the positive electrode 2 and the negative electrode 3, thereby having a function of preventing these physical contacts.

さらに、セパレータ４は、孔中に非水電解液を保持する機能を有する。すなわち、セパレータ４が非水電解液を吸収することによって、放電時にリチウムイオンを通過させることができる。   Furthermore, the separator 4 has a function of holding the nonaqueous electrolytic solution in the holes. That is, when the separator 4 absorbs the nonaqueous electrolytic solution, lithium ions can pass through during discharge.

[正極リード１０]
正極リード１０の材料である正極リード材料としては、例えば、低融点材料を用いることができる。また、正極リード材料の融点は、２５０℃以下とされる。融点が２５０℃以下の材料を用いることで、大電流通電時に十分な遮断機能を発現できる。 [Positive lead 10]
As a positive electrode lead material that is a material of the positive electrode lead 10, for example, a low melting point material can be used. The melting point of the positive electrode lead material is 250 ° C. or less. By using a material having a melting point of 250 ° C. or less, a sufficient blocking function can be exhibited when a large current is applied.

一実施形態では、低融点材料からなる正極リード１０を用いることによって、充電／外部短絡等の誤使用により電池に大電流が流れた場合、ジュール熱によってリードが溶断され、電流を遮断できるため、従来技術である熱感抵抗素子を用いた場合と同様、電池の異常発熱を防止できる。   In one embodiment, by using a positive electrode lead 10 made of a low melting point material, when a large current flows through the battery due to misuse such as charging / external short circuit, the lead is blown by Joule heat, and the current can be cut off. As in the case of using the conventional thermosensitive resistor element, abnormal heat generation of the battery can be prevented.

なお、正極リード１０に関して試験を重ねた結果、正極リード１０を溶断する電流は、正極リード１０の断面積に比例する傾向が得られた。したがって、正極リード１０の形状については、特に制限はない。例えば、帯状、線状等の正極リード１０を用いることができる。   As a result of repeated tests on the positive electrode lead 10, the current for fusing the positive electrode lead 10 tended to be proportional to the cross-sectional area of the positive electrode lead 10. Therefore, the shape of the positive electrode lead 10 is not particularly limited. For example, a strip-like, linear, etc. positive electrode lead 10 can be used.

さらに、正極リード１０の断面積については、電池を正しく使用した場合の電流領域、および誤使用時に発生する電流の大きさ等から、適宜設計されるのが好ましい。   Furthermore, the cross-sectional area of the positive electrode lead 10 is preferably designed as appropriate from the current region when the battery is correctly used, the magnitude of the current generated during incorrect use, and the like.

具体的に、正極リード材料としては、例えば、Ｓｎ（スズ），Ｉｎ（インジウム）の内から選ばれた１成分で構成される。また、例えば、Ｓｎ，Ｉｎ，Ｂｉ（ビスマス），Ｐｂ（鉛）の内から選ばれた２成分で構成される。さらに、例えば、Ｓｎ，Ｉｎ，Ｂｉ，Ｐｂの内から選ばれた３成分で構成される。さらに、例えば、Ｓｎ，Ｉｎ，Ｂｉ，Ｐｂの４成分で構成される。   Specifically, the positive electrode lead material is composed of, for example, one component selected from Sn (tin) and In (indium). Further, for example, it is composed of two components selected from Sn, In, Bi (bismuth), and Pb (lead). Further, for example, it is composed of three components selected from Sn, In, Bi, and Pb. Furthermore, for example, it is composed of four components of Sn, In, Bi, and Pb.

正極リード材料の組成は、十分な延性、展性を有し、形状の加工および変形が容易であり、且つ正極リード材料の融点が２５０℃以下となり、大電流通電時に十分な遮断機能を発現できる点から規定される。   The composition of the positive electrode lead material has sufficient ductility and malleability, can be easily processed and deformed in shape, and the positive electrode lead material has a melting point of 250 ° C. or less, and can exhibit a sufficient blocking function when a large current is applied. It is defined in terms of points.

正極リード材料が２成分で構成される場合、例えば、ＳｎとＢｉとの２成分で構成される場合は、正極リード材料のＢｉの組成が５重量％以下であることが好ましい。   When the positive electrode lead material is composed of two components, for example, when the positive electrode lead material is composed of two components of Sn and Bi, the composition of Bi in the positive electrode lead material is preferably 5% by weight or less.

例えば、ＳｎとＰｂとの２成分で構成される場合は、正極リード材料のＰｂの組成が６５重量％以下であることが好ましい。   For example, when composed of two components of Sn and Pb, the composition of Pb in the positive electrode lead material is preferably 65% by weight or less.

例えば、ＩｎとＢｉとの２成分で構成される場合は、正極リード材料のＢｉの組成が２５重量％以下であることが好ましい。   For example, in the case of being composed of two components of In and Bi, the composition of Bi in the positive electrode lead material is preferably 25% by weight or less.

例えば、ＩｎとＰｂとの２成分で構成される場合は、正極リード材料のＰｂの組成が７０重量％以下であることが好ましい。   For example, when composed of two components of In and Pb, the composition of Pb in the positive electrode lead material is preferably 70% by weight or less.

例えば、ＢｉとＰｂとの２成分で構成される場合は、正極リード材料のＰｂの組成が６０重量％以上７５重量％以下であることが好ましい。   For example, in the case of being composed of two components of Bi and Pb, the composition of Pb in the positive electrode lead material is preferably 60% by weight or more and 75% by weight or less.

正極リード材料が３成分で構成される場合、例えば、Ｓｎ，Ｂｉ，Ｐｂの３成分で構成される場合は、正極リード材料のＢｉの組成が２５重量％以下であり、且つＰｂの組成が４５重量％以上７０重量％以下であることが好ましい。   When the positive electrode lead material is composed of three components, for example, when composed of three components of Sn, Bi, and Pb, the composition of Bi in the positive electrode lead material is 25% by weight or less and the composition of Pb is 45. It is preferable that the content is not less than 70% by weight.

例えば、Ｉｎ，Ｂｉ，Ｐｂの３成分で構成される場合は、正極リード材料のＢｉの組成が２５重量％以下であり、且つＰｂの組成が７０重量％以下であることが好ましい。   For example, when it is composed of three components of In, Bi, and Pb, it is preferable that the composition of Bi in the positive electrode lead material is 25% by weight or less and the composition of Pb is 70% by weight or less.

例えば、Ｓｎ，Ｉｎ，Ｐｂの３成分で構成される場合は、正極リード材料のＰｂの組成が６５重量％以下であることが好ましい。   For example, when composed of three components of Sn, In, and Pb, the composition of Pb in the positive electrode lead material is preferably 65% by weight or less.

例えば、Ｓｎ，Ｉｎ，Ｂｉの３成分で構成される場合は、正極リード材料のＢｉの組成が、式（Ｂｉの重量％）≦２５−（Ｓｎの重量％）×０．２５を満たすことが好ましい。   For example, in the case of being composed of three components of Sn, In, and Bi, the composition of Bi in the positive electrode lead material satisfies the formula (% by weight of Bi) ≦ 25 − (% by weight of Sn) × 0.25. preferable.

正極リード材料が４成分で構成される場合、例えば、Ｓｎ，Ｉｎ，Ｂｉ，Ｐｂで構成される場合は、正極リード材料のＰｂの組成が７０重量％以下であることが好ましい。さらに、正極リード材料のＢｉの組成が２５重量％以下であることが好ましい。   When the positive electrode lead material is composed of four components, for example, when it is composed of Sn, In, Bi, and Pb, the composition of Pb in the positive electrode lead material is preferably 70% by weight or less. Further, the Bi composition of the positive electrode lead material is preferably 25% by weight or less.

さらに、一実施形態による正極リード１０は、正極２および正極端子側内部に配置される安全弁８と、例えば溶接等の手法で、電気的に接続された状態となる。しかしながら、このときの接続強度が十分でないと、電池に対して物理的衝撃を加えた際に正極リード１０が脱落し、電池として機能しなくなる。   Furthermore, the positive electrode lead 10 according to the embodiment is in a state of being electrically connected to the safety valve 8 disposed inside the positive electrode 2 and the positive electrode terminal side by a technique such as welding. However, if the connection strength at this time is not sufficient, the positive electrode lead 10 drops off when a physical impact is applied to the battery, and the battery does not function.

したがって、十分な接続強度を確保する必要がある点から、正極２はＣｕで構成されるのが好ましい。さらに、安全弁８の溶接表面はＣｕとされる。溶接表面をＣｕとするために、安全弁８の材料としては、例えばＣｕを用いる。さらに、例えば他の金属であって、その表面をＣｕで覆うようにしたものを用いてもよい。   Therefore, it is preferable that the positive electrode 2 is made of Cu from the viewpoint of ensuring sufficient connection strength. Furthermore, the welding surface of the safety valve 8 is Cu. In order to set the welding surface to Cu, for example, Cu is used as the material of the safety valve 8. Furthermore, for example, another metal having a surface covered with Cu may be used.

正極リード１０との溶接を行う際には、正極２および安全弁８と正極リード１０との濡れ性を良くし、良好な溶接状態とするために、例えば、適当なフラックスを用いるのが好ましい。   When welding with the positive electrode lead 10, it is preferable to use an appropriate flux, for example, in order to improve the wettability of the positive electrode 2 and the safety valve 8 and the positive electrode lead 10 and to achieve a good welding state.

[正極２]
正極２は、帯状の形状を有する正極集電体と、この正極集電体の両面に形成された正極合剤層とからなる。正極集電体としては、正極リード１０との濡れ性を良くできる点から、Ｃｕ箔を用いることができる。 [Positive electrode 2]
The positive electrode 2 is composed of a positive electrode current collector having a strip shape and a positive electrode mixture layer formed on both surfaces of the positive electrode current collector. As the positive electrode current collector, a Cu foil can be used because wettability with the positive electrode lead 10 can be improved.

正極合剤層は、例えば、正極活物質である二硫化鉄（ＦｅＳ2）と、導電助剤と、結着剤とからなる。二硫化鉄としては、主に自然界に存在する黄鉄鉱（pyrite）を粉砕したものを用いることができる。 The positive electrode mixture layer is made of, for example, iron disulfide (FeS 2 ) that is a positive electrode active material, a conductive additive, and a binder. As iron disulfide, what pulverized pyrite which exists mainly in nature can be used.

さらに、二硫化鉄としては、例えば化学合成して得られるものを用いることができる。具体的には、例えば、塩化第一鉄（ＦｅＣｌ2）を硫化水素（Ｈ2Ｓ）中にて焼成して得られる二硫化鉄等を用いることができる。 Furthermore, as iron disulfide, for example, one obtained by chemical synthesis can be used. Specifically, for example, iron disulfide obtained by firing ferrous chloride (FeCl 2 ) in hydrogen sulfide (H 2 S) can be used.

導電助剤としては、正極活物質に適量混合して導電性を付与できるものであれば、特に制限なく用いることができる。導電助剤としては、例えば、グラファイト、カーボンブラックなどの炭素粉末を用いることができる。   Any conductive aid can be used without particular limitation as long as it can be mixed with an appropriate amount of the positive electrode active material to impart conductivity. As the conductive aid, for example, carbon powder such as graphite and carbon black can be used.

結着剤としては、公知の結着剤を用いることができ、例えば、ポリフッ化ビニル（ＰＶＦ）、ポリフッ化ビニリデン（ＰＶＤＦ）、ポリテトラフルオロエチレン等のフッ素系樹脂を用いることができる。   As the binder, a known binder can be used. For example, a fluorine-based resin such as polyvinyl fluoride (PVF), polyvinylidene fluoride (PVDF), polytetrafluoroethylene, or the like can be used.

[負極３]
負極３は、例えば、帯状の形状を有する負極活物質としての金属箔からなる。金属箔の材料としては、例えば、リチウム金属またはリチウムにアルミニウム（Ａｌ）などの合金元素を添加したリチウム合金等を用いることができる。 [Negative electrode 3]
The negative electrode 3 is made of, for example, a metal foil as a negative electrode active material having a strip shape. As a material of the metal foil, for example, lithium metal or a lithium alloy obtained by adding an alloy element such as aluminum (Al) to lithium can be used.

[電解液]
電解液としては、例えばリチウム塩を電解質として、これを有機溶媒に溶解させた電解液を用いることができる。有機溶媒としては、例えば、プロピレンカーボネート、エチレンカーボネート、１，２−ジメトキシエタン、γ−ブチロラクトン、テトラヒドロフラン、２−メチルテトラヒドロフラン、１，３−ジオキソラン、スルホラン、アセトニトリル、ジメチルカーボネート、ジプロピルカーボネート等の単独または二種類以上の混合溶媒を用いることができる。 [Electrolyte]
As the electrolytic solution, for example, an electrolytic solution in which a lithium salt is used as an electrolyte and dissolved in an organic solvent can be used. Examples of the organic solvent include propylene carbonate, ethylene carbonate, 1,2-dimethoxyethane, γ-butyrolactone, tetrahydrofuran, 2-methyltetrahydrofuran, 1,3-dioxolane, sulfolane, acetonitrile, dimethyl carbonate, dipropyl carbonate and the like. Alternatively, two or more kinds of mixed solvents can be used.

電解質としては、過塩素酸リチウム(ＬｉＣｌＯ4)、六フッ化リン酸リチウム(ＬｉＰＦ6)、四フッ化ホウ酸リチウム(ＬｉＢＦ4)、トリフルオロメタンスルホン酸リチウム(ＬｉＣＦ3ＳＯ3)、ヨウ化リチウム(ＬｉＩ)等を用いることができる。 Examples of the electrolyte include lithium perchlorate (LiClO 4 ), lithium hexafluorophosphate (LiPF 6 ), lithium tetrafluoroborate (LiBF 4 ), lithium trifluoromethanesulfonate (LiCF 3 SO 3 ), lithium iodide (LiI) or the like can be used.

[セパレータ４]
セパレータ４としては、例えばポリプロピレン、ポリエチレン等のポリオレフィン系の微多孔性フィルム等を用いることができる。 [Separator 4]
As the separator 4, for example, a polyolefin microporous film such as polypropylene or polyethylene can be used.

次に、この発明の一実施形態によるリチウム／二硫化鉄一次電池の製造方法について説明する。   Next, a method for manufacturing a lithium / iron disulfide primary battery according to an embodiment of the present invention will be described.

まず、例えば、正極活物質と、結着剤と、導電助剤とを混合して正極合剤を調製し、この正極合剤をＮ−メチル−２−ピロリドン（ＮＭＰ）などの溶剤に分散してペースト状の正極合剤スラリーとする。   First, for example, a positive electrode active material, a binder, and a conductive additive are mixed to prepare a positive electrode mixture, and this positive electrode mixture is dispersed in a solvent such as N-methyl-2-pyrrolidone (NMP). To make a paste-like positive electrode mixture slurry.

次に、この正極合剤スラリーを正極集電体上に塗布して乾燥させた後、例えばローラプレス機等で圧縮成型して正極合剤層を形成し、帯状の正極２を作製する。   Next, this positive electrode mixture slurry is applied onto a positive electrode current collector and dried, and then, for example, is formed by compression molding using a roller press or the like to form a positive electrode mixture layer, thereby producing a belt-like positive electrode 2.

次に、帯状の形状を有する正極２と、帯状の形状を有する負極３と、帯状の形状を有するセパレータ３とを、例えば正極２、セパレータ４、負極３、セパレータ４の順に積層し、長手方向に多数回巻回して、渦巻型電極体を作製する。   Next, the positive electrode 2 having a strip shape, the negative electrode 3 having a strip shape, and the separator 3 having a strip shape are laminated in the order of, for example, the positive electrode 2, the separator 4, the negative electrode 3, and the separator 4, and the longitudinal direction To make a spiral electrode body.

次に、渦巻型電極体を電池缶１に収納する。渦巻型電極体を収納する前に、電池缶１の内側に例えばニッケルメッキを施し、電池缶１の下部に絶縁板６を挿入しておく。電池缶１に、渦巻型電極体を収納した後、渦巻型電極体の上面に絶縁板５を配設する。   Next, the spiral electrode body is accommodated in the battery can 1. Before housing the spiral electrode body, for example, nickel plating is applied to the inside of the battery can 1 and an insulating plate 6 is inserted into the lower portion of the battery can 1. After the spiral electrode body is accommodated in the battery can 1, the insulating plate 5 is disposed on the upper surface of the spiral electrode body.

次に、負極３の集電をとるために、例えばニッケルからなる負極リード１１の一端を負極３に取り付け、他端を電池缶１に溶接する。負極リード１１が負極３および電池缶１に接続されると、電池缶１は、負極３と導通を有することとなり、外部負極となる。   Next, in order to collect current of the negative electrode 3, one end of the negative electrode lead 11 made of, for example, nickel is attached to the negative electrode 3 and the other end is welded to the battery can 1. When the negative electrode lead 11 is connected to the negative electrode 3 and the battery can 1, the battery can 1 is electrically connected to the negative electrode 3 and becomes an external negative electrode.

次に、正極２の集電をとるために、低融点金属材料からなる正極リード１０の一端を正極２に取り付け、他端を安全弁８を介して電池蓋７と電気的に接続する。正極リード１０が正極２および電池蓋７に接続されると、電池蓋７は、正極２と導通を有することとなり、外部正極となる。   Next, in order to collect current from the positive electrode 2, one end of the positive electrode lead 10 made of a low melting point metal material is attached to the positive electrode 2, and the other end is electrically connected to the battery lid 7 through the safety valve 8. When the positive electrode lead 10 is connected to the positive electrode 2 and the battery cover 7, the battery cover 7 has electrical continuity with the positive electrode 2 and becomes an external positive electrode.

次に、この電池缶１の中に、電解質を有機溶媒に溶解させて調製した電解液を注入し、アスファルトを塗布した封口ガスケット９を介して電池缶１をかしめる。これにより、電池蓋７が固定される。以上により、この発明の一実施形態によるリチウム／二硫化鉄一次電池が作製される。   Next, an electrolytic solution prepared by dissolving an electrolyte in an organic solvent is injected into the battery can 1 and the battery can 1 is caulked through a sealing gasket 9 coated with asphalt. Thereby, the battery cover 7 is fixed. As described above, the lithium / iron disulfide primary battery according to the embodiment of the present invention is manufactured.

上述の一実施形態によるリチウム／二硫化鉄一次電池の一例では、正極リードが安全弁８に直接溶接された構造を有するものについて説明したが、安全弁８の材料として、例えばアルミニウムのように、正極リード１０を溶接することができないものを用いた場合は、正極リード１０を直接安全弁８に溶接することが不可能となる。   In the example of the lithium / iron disulfide primary battery according to the above-described embodiment, the positive electrode lead has a structure in which the positive electrode lead is directly welded to the safety valve 8. However, as the material of the safety valve 8, for example, positive electrode lead such as aluminum is used. In the case where an electrode that cannot weld 10 is used, it is impossible to weld the positive electrode lead 10 directly to the safety valve 8.

そこで、リチウム／二硫化鉄一次電池は、例えば、図２に示すように、安全弁８とは別に正極リード１０を直接溶接するための部材（以下、溶接用部品と称する）を内部に配置した構造とされる。   Therefore, the lithium / iron disulfide primary battery has a structure in which a member (hereinafter referred to as a welding part) for directly welding the positive electrode lead 10 is arranged inside the safety valve 8, as shown in FIG. It is said.

図２に示すように、電池缶１の開放端部には、電池蓋７と、この電池蓋７の内側に設けられた安全弁８、更にその内側に溶接用部品１２が設けられている。溶接用部品１２には、正極リード１０が直接溶接される。溶接用部品１２は、封口ガスケット９を介してかしめられることにより取り付けられており、電池缶１の内部は密閉されている。   As shown in FIG. 2, a battery lid 7, a safety valve 8 provided inside the battery lid 7, and a welding part 12 inside the battery lid 7 are provided at the open end of the battery can 1. The positive electrode lead 10 is directly welded to the welding component 12. The welding part 12 is attached by caulking through a sealing gasket 9, and the inside of the battery can 1 is sealed.

また、十分な接続強度を確保する必要がある点から、溶接用部品１２の溶接表面がＣｕとされる。溶接表面をＣｕとするために、溶接用部品１２の材料としては、例えばＣｕを用いることができる。さらに、例えば他の金属であって、その表面をＣｕで覆うようにしたものを用いてもよい。   Moreover, the welding surface of the welding component 12 is made into Cu from the point which needs to ensure sufficient connection strength. In order to set the welding surface to Cu, for example, Cu can be used as the material of the welding part 12. Furthermore, for example, another metal having a surface covered with Cu may be used.

また、正極リード１０との溶接を行う際には、正極および溶接用部品１２と正極リード１０との濡れ性を良くし、良好な溶接状態とするために、例えば、適当なフラックスを用いるのが好ましい。その他は、図１に示す一実施形態による電池の一例と同様であるので説明を省略する。   Further, when welding with the positive electrode lead 10, for example, an appropriate flux is used in order to improve the wettability between the positive electrode and the welding component 12 and the positive electrode lead 10 and to achieve a good welding state. preferable. Others are the same as the example of the battery according to the embodiment shown in FIG.

＜実施例１＞
まず、正極活物質である二硫化鉄９８重量％と、炭素粉末１重量％と、結着剤１重量％（乾燥重量）とを混合し、溶剤であるＮ−メチル−２−ピロリドン（ＮＭＰ）に十分に分散させて正極合剤スラリーとした。 <Example 1>
First, 98% by weight of iron disulfide that is a positive electrode active material, 1% by weight of carbon powder, and 1% by weight (dry weight) of a binder are mixed, and N-methyl-2-pyrrolidone (NMP) that is a solvent is mixed. To make a positive electrode mixture slurry.

次に、正極集電体として厚さ２０μｍのＣｕ箔を用い、正極集電体の両面に対して、正極合剤スラリーを、正極集電体の一端部に未塗布部を残すように塗布した。   Next, a 20 μm-thick Cu foil was used as the positive electrode current collector, and the positive electrode mixture slurry was applied to both sides of the positive electrode current collector so as to leave an uncoated portion at one end of the positive electrode current collector. .

次に、正極集電体に塗布された正極合剤を、１２０℃の温度条件で、２時間乾燥させてＮ−メチル−２−ピロリドンを揮発させた後、一定圧力下、ローラプレス機で圧縮成型を行うことによって、厚さ１５０μｍの帯状の正極２を作製した。   Next, the positive electrode mixture applied to the positive electrode current collector was dried at 120 ° C. for 2 hours to volatilize N-methyl-2-pyrrolidone, and then compressed with a roller press under a constant pressure. By molding, a belt-like positive electrode 2 having a thickness of 150 μm was produced.

その後、正極端部の正極合剤未塗布部分に、正極リード１０を溶接した。正極リード材料は、Ｓｎの１成分で構成した。なお、正極リード１０の溶断電流は、４Ａ程度となるように設計した。   Then, the positive electrode lead 10 was welded to the positive electrode mixture uncoated part of the positive electrode end. The positive electrode lead material was composed of one component of Sn. The fusing current of the positive electrode lead 10 was designed to be about 4A.

次に、厚さ１５０μｍの帯状の金属リチウム負極３の端部一方にＮｉリードを圧着し、この負極３と、以上のようにして作製した帯状の正極２とを、正極２、セパレータ４、負極３、セパレータ４の順に積層してから多数回巻回し、外形９ｍｍの渦巻型電極体を作製した。   Next, a Ni lead is pressure-bonded to one end of a 150 μm thick strip-shaped metallic lithium negative electrode 3, and the negative electrode 3 and the strip-shaped positive electrode 2 manufactured as described above are connected to the positive electrode 2, the separator 4, and the negative electrode. 3 and separator 4 were laminated in this order and then wound many times to produce a spiral electrode body having an outer diameter of 9 mm.

次に、以上のようにして得た渦巻型電極体を、ニッケルメッキを施した鉄製の電池缶１に収納した。そして、渦巻型電極体の上下両面に絶縁板５，６を配設し、正極リード１０を正極集電体から導出して電池蓋７に、ニッケル製の負極リード１１を負極集電体から導出して電池缶１に溶接した。   Next, the spiral electrode body obtained as described above was accommodated in an iron battery can 1 plated with nickel. Insulating plates 5 and 6 are disposed on the upper and lower surfaces of the spiral electrode body, the positive electrode lead 10 is led out from the positive electrode current collector, and the negative electrode lead 11 made of nickel is led out from the negative electrode current collector. And welded to the battery can 1.

次に、１，２−ジメトキシエタン（ＤＭＥ）と、１，３−ジオキソランとを１：１の体積比で混合した溶媒に、ヨウ化リチウム（ＬｉＩ）を１．０ｍｏｌ／ｌとなるように添加した電解液を作製し、その後、この電解液を、渦巻型電極体が収容された電池缶１の中に注入した。   Next, lithium iodide (LiI) was added to a solvent in which 1,2-dimethoxyethane (DME) and 1,3-dioxolane were mixed at a volume ratio of 1: 1 so as to be 1.0 mol / l. Then, this electrolytic solution was injected into the battery can 1 in which the spiral electrode body was accommodated.

次に、アスファルトが表面に塗布された絶縁封口ガスケット９を介して、電池缶１をかしめることによって、電池蓋７および安全弁８を固定し、電池内の気密性を保持させた。以上の工程によって、直径１０ｍｍ、高さ約４４ｍｍを有する円筒型のリチウム／二硫化鉄一次電池を作製した。   Next, the battery lid 7 and the safety valve 8 were fixed by caulking the battery can 1 through an insulating sealing gasket 9 having asphalt coated on the surface, and the airtightness in the battery was maintained. Through the above steps, a cylindrical lithium / iron disulfide primary battery having a diameter of 10 mm and a height of about 44 mm was produced.

＜実施例２＞
正極リード材料を、Ｓｎ，Ｂｉの２成分で、表１に示す組成で構成した以外は、実施例１と同様にして、実施例２のリチウム／二硫化鉄一次電池を作製した。 <Example 2>
A lithium / iron disulfide primary battery of Example 2 was fabricated in the same manner as Example 1, except that the positive electrode lead material was composed of two components of Sn and Bi and having the composition shown in Table 1.

＜実施例３〜実施例１１＞
正極リード材料を、Ｓｎ，Ｉｎの２成分で、表１に示す組成で構成した以外は、実施例１と同様にして、実施例３〜実施例１１のリチウム／二硫化鉄一次電池を作製した。 <Example 3 to Example 11>
Lithium / iron disulfide primary batteries of Examples 3 to 11 were fabricated in the same manner as in Example 1 except that the positive electrode lead material was composed of two components of Sn and In and the composition shown in Table 1. .

＜実施例１２〜実施例２０＞
正極リード材料を、Ｓｎ，Ｐｂの２成分で、表１に示す組成で構成した以外は、実施例１と同様にして、実施例１２〜実施例２０のリチウム／二硫化鉄一次電池を作製した。 <Example 12 to Example 20>
Lithium / iron disulfide primary batteries of Examples 12 to 20 were fabricated in the same manner as in Example 1 except that the positive electrode lead material was composed of the two components Sn and Pb and the composition shown in Table 1. .

＜実施例２１＞
正極リード材料を、Ｉｎの１成分で、表２に示す組成で構成した以外は、実施例１と同様にして、実施例２１のリチウム／二硫化鉄一次電池を作製した、 <Example 21>
A lithium / iron disulfide primary battery of Example 21 was produced in the same manner as in Example 1 except that the positive electrode lead material was composed of one component of In and the composition shown in Table 2.

＜実施例２２〜実施例２４＞
正極リード材料を、Ｉｎ，Ｂｉの２成分で、表２に示す組成で構成した以外は、実施例１と同様にして、実施例２２〜実施例２４のリチウム／二硫化鉄一次電池を作製した。 <Example 22 to Example 24>
Lithium / iron disulfide primary batteries of Examples 22 to 24 were fabricated in the same manner as in Example 1 except that the positive electrode lead material was composed of two components of In and Bi and had the composition shown in Table 2. .

＜実施例２５〜実施例３０＞
正極リード材料を、Ｉｎ，Ｐｂの２成分で、表２に示す組成で構成した以外は、実施例１と同様にして、実施例２５〜実施例３０のリチウム／二硫化鉄一次電池を作製した。 <Example 25 to Example 30>
Lithium / iron disulfide primary batteries of Examples 25 to 30 were fabricated in the same manner as in Example 1 except that the positive electrode lead material was composed of two components of In and Pb and the composition shown in Table 2. .

＜実施例３１〜実施例３５＞
正極リード材料を、Ｂｉ，Ｐｂの２成分で、表３に示す組成で構成した以外は、実施例１と同様にして、実施例３１〜実施例３５のリチウム／二硫化鉄一次電池を作製した。 <Example 31 to Example 35>
Lithium / iron disulfide primary batteries of Examples 31 to 35 were fabricated in the same manner as in Example 1 except that the positive electrode lead material was composed of the two components Bi and Pb and the composition shown in Table 3. .

＜実施例３６〜実施例５２＞
正極リード材料を、Ｓｎ，Ｐｂ，Ｂｉの３成分で、表４に示す組成で構成した以外は、実施例１と同様にして、実施例３６〜実施例５２のリチウム／二硫化鉄一次電池を作製した。 <Example 36 to Example 52>
The lithium / iron disulfide primary batteries of Examples 36 to 52 were made in the same manner as in Example 1 except that the positive electrode lead material was composed of three components of Sn, Pb, and Bi and had the composition shown in Table 4. Produced.

＜実施例５３〜実施例７１＞
正極リード材料を、Ｉｎ，Ｐｂ，Ｂｉの３成分で、表５に示す組成で構成した以外は、実施例１と同様にして、実施例５３〜実施例７１のリチウム／二硫化鉄一次電池を作製した。 <Example 53 to Example 71>
The lithium / iron disulfide primary batteries of Examples 53 to 71 are the same as Example 1 except that the positive electrode lead material is composed of three components of In, Pb, and Bi and has the composition shown in Table 5. Produced.

＜実施例７２〜実施例８０＞
正極リード材料を、Ｓｎ，Ｉｎ，Ｂｉの３成分で、表６に示す組成で構成した以外は、実施例１と同様にして、実施例７２〜実施例８０のリチウム／二硫化鉄一次電池を作製した。 <Example 72 to Example 80>
The lithium / iron disulfide primary batteries of Examples 72 to 80 are the same as Example 1 except that the positive electrode lead material is composed of three components of Sn, In, and Bi and has the composition shown in Table 6. Produced.

＜実施例８１〜実施例１０１＞
正極リード材料を、Ｓｎ，Ｉｎ，Ｐｂの３成分で、表６に示す組成で構成した以外は、実施例１と同様にして、実施例８１〜実施例１０１のリチウム／二硫化鉄一次電池を作製した。 <Example 81 to Example 101>
The lithium / iron disulfide primary batteries of Examples 81 to 101 are the same as Example 1 except that the positive electrode lead material is composed of three components of Sn, In, and Pb and has the composition shown in Table 6. Produced.

＜実施例１０２〜実施例１２３＞
正極リード材料を、Ｉｎ，Ｓｎ，Ｐｂ，Ｂｉの４成分で、表７に示す組成で構成した以外は、実施例１と同様にして、実施例１０２〜実施例１２３のリチウム／二硫化鉄一次電池を作製した。 <Example 102 to Example 123>
The lithium / iron disulfide primary of Examples 102 to 123 is the same as Example 1 except that the positive electrode lead material is composed of four components of In, Sn, Pb, and Bi and has the composition shown in Table 7. A battery was produced.

＜比較例＞
正極リード材料を、Ｎｉの１成分で構成した以外は、実施例１と同様にして、比較例のリチウム／二硫化鉄一次電池を作製した。 <Comparative example>
A lithium / iron disulfide primary battery of a comparative example was fabricated in the same manner as in Example 1 except that the positive electrode lead material was composed of one component of Ni.

次に、上述のようにして得られた実施例１〜実施例１２３および比較例のリチウム／二硫化鉄一次電池を１００ｍＡの定電流で１．５時間（１５０ｍＡ）の条件で予備放電した。リチウム／二硫化鉄電池系では、作製直後の開回路電圧は２Ｖ以上と高いため、上述のように予備放電と呼ばれる工程により、電池容量の１０％程度を放電させて電位を降下させるのが一般的である。   Next, the lithium / iron disulfide primary batteries of Examples 1 to 123 and Comparative Example obtained as described above were predischarged at a constant current of 100 mA for 1.5 hours (150 mA). In the lithium / iron disulfide battery system, the open circuit voltage immediately after fabrication is as high as 2 V or more, so it is common to discharge about 10% of the battery capacity and lower the potential by a process called preliminary discharge as described above. Is.

次に、誤使用の条件として逆装填を想定し、実施例１〜実施例１２３および比較例の電池を各１００本準備し、定電流電源装置を用いて、５Ａの電流にて充電試験を行った。表１〜表７に測定結果を示す。

Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
 Next, assuming reverse loading as a condition of misuse, 100 batteries of Examples 1 to 123 and Comparative Example were prepared, and a charge test was performed at a current of 5 A using a constant current power supply device. It was. Tables 1 to 7 show the measurement results.
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616

次に、誤使用の条件として外部短絡を想定し、実施例１〜実施例１２３および比較例の電池を各１００本準備し、４本直列外部短絡試験を行った。表８〜表１４に測定結果を示す。

Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
 Next, assuming an external short circuit as a misuse condition, 100 batteries of Examples 1 to 123 and Comparative Example were prepared, and a four-series external short circuit test was performed. Tables 8 to 14 show the measurement results.
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616
Figure 2007066616

表１に示すように、比較例は、充電試験中、電池温度が非常に高温に達し、その後、電池が非常に高い確率で熱暴走に至るのに対し、実施例１〜実施例１８は、電池温度が低く熱暴走に至らないことがわかる。   As shown in Table 1, in the comparative example, the battery temperature reached a very high temperature during the charging test, and then the battery reached a thermal runaway with a very high probability. It can be seen that the battery temperature is low and thermal runaway does not occur.

試験後、実施例１〜実施例１８の電池を解体して調べたところ、正極リードが溶断されており、大電流の充電環境に対しても確実に機能することが確認できた。なお、実施例１９および実施例２０については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては不十分である。   After the test, the batteries of Examples 1 to 18 were disassembled and examined. As a result, it was confirmed that the positive electrode lead was melted and functioned reliably even in a large current charging environment. In addition, about Example 19 and Example 20, although the probability is low with respect to a comparative example, the case leading to thermal runaway was confirmed, and it is inadequate as a safety mechanism.

また、表８に示すように、充電試験と同様、比較例は、電池から高確率でガス噴出または熱暴走するが、実施例１〜実施例１８は、ガス噴出および熱暴走が確認されなかった。   Further, as shown in Table 8, as in the charge test, the comparative example has a high probability of gas ejection or thermal runaway from the battery, but in Examples 1 to 18, gas ejection and thermal runaway were not confirmed. .

なお、充電試験と同様、実施例１〜実施例１８の電池を解体したところ、正極リードが溶断されており、外部短絡によって、電池に大電流が流れた際に機能していることが確認できた。実施例１９および実施例２０については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては、不十分である。   As with the charge test, when the batteries of Examples 1 to 18 were disassembled, it was confirmed that the positive electrode lead was blown and that it functions when a large current flows through the battery due to an external short circuit. It was. For Example 19 and Example 20, although the probability is lower than that of the comparative example, a case of thermal runaway has been confirmed, which is insufficient as a safety mechanism.

また、表１および表８に示すように、正極リード材料がＳｎ，Ｂｉの２成分で構成される場合において、Ｂｉの組成が５重量％を超えると、材料が脆く加工ができなかった。   As shown in Tables 1 and 8, when the positive electrode lead material was composed of two components of Sn and Bi, when the Bi composition exceeded 5% by weight, the material was brittle and could not be processed.

さらに、表１および表８に示すように、正極リード材料がＳｎ，Ｐｂの２成分で構成される場合において、Ｐｂの組成が６５重量％を超えると、熱暴走に至ることがわかる。   Further, as shown in Tables 1 and 8, when the positive electrode lead material is composed of two components of Sn and Pb, it can be seen that thermal runaway occurs when the Pb composition exceeds 65% by weight.

表２に示すように、比較例は、充電試験中、電池温度が非常に高温に達し、その後、電池が非常に高い確率で熱暴走に至るのに対し、実施例２１〜実施例２８は、電池温度が低く熱暴走に至らないことがわかる。   As shown in Table 2, in the comparative example, the battery temperature reached a very high temperature during the charging test, and then the battery reached a thermal runaway with a very high probability. It can be seen that the battery temperature is low and thermal runaway does not occur.

試験後、実施例２１〜実施例２８の電池を解体して調べたところ、正極リードが溶断されており、大電流の充電環境に対しても確実に機能することが確認できた。実施例２９および実施例３０については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては不十分である。   After the test, when the batteries of Examples 21 to 28 were disassembled and examined, it was confirmed that the positive electrode lead was melted and functioned reliably even in a high-current charging environment. For Example 29 and Example 30, although the probability is lower than that of the comparative example, a case of thermal runaway has been confirmed, which is insufficient as a safety mechanism.

また、表９に示すように、充電試験と同様、比較例は、電池から高確率でガス噴出または熱暴走するが、実施例２１〜実施例２８は、ガス噴出および熱暴走が確認されなかった。   Further, as shown in Table 9, as in the charge test, the comparative example has a high probability of gas ejection or thermal runaway from the battery, but in Examples 21 to 28, gas ejection and thermal runaway were not confirmed. .

なお、充電試験と同様、実施例２１〜実施例２８の電池を解体したところ、正極リードが溶断されており、外部短絡によって、電池に大電流が流れた際に機能していることが確認できた。実施例２９および実施例３０については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては、不十分である。   As in the charge test, when the batteries of Examples 21 to 28 were disassembled, the positive electrode lead was blown, and it was confirmed that the battery was functioning when a large current flowed through the battery due to an external short circuit. It was. Although the probability of Example 29 and Example 30 is low compared to the comparative example, a case of thermal runaway has been confirmed, which is insufficient as a safety mechanism.

また、表２および表９が示すように、正極リード材料がＩｎ，Ｂｉの２成分で構成される場合において、Ｂｉの組成が２５重量％を超えると、材料が脆く加工ができなかった。   Further, as shown in Tables 2 and 9, when the positive electrode lead material was composed of two components of In and Bi, when the Bi composition exceeded 25% by weight, the material was brittle and could not be processed.

さらに、表２および表９が示すように、正極リード材料がＩｎ，Ｐｂの２成分で構成される場合において、Ｐｂの組成が７０重量％を超えると、熱暴走に至ることがわかる。   Further, as shown in Tables 2 and 9, it can be seen that when the positive electrode lead material is composed of two components of In and Pb, thermal runaway occurs when the Pb composition exceeds 70% by weight.

表３に示すように、比較例は、充電試験中、電池温度が非常に高温に達し、その後、電池が非常に高い確率で熱暴走に至るのに対し、実施例３１〜実施例３３は、電池温度が低く熱暴走に至らないことがわかる。   As shown in Table 3, in the comparative example, the battery temperature reached a very high temperature during the charging test, and then the battery reached a thermal runaway with a very high probability. It can be seen that the battery temperature is low and thermal runaway does not occur.

試験後、実施例３１〜実施例３３の電池を解体して調べたところ、正極リードが溶断されており、大電流の充電環境に対しても確実に機能することが確認できた。実施例３４および実施例３５については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては不十分である。   After the test, the batteries of Examples 31 to 33 were disassembled and examined. As a result, it was confirmed that the positive electrode lead was melted and functioned reliably even in a high-current charging environment. In Examples 34 and 35, although the probability is low compared to the comparative example, a case of thermal runaway has been confirmed, which is insufficient as a safety mechanism.

また、表１０に示すように、充電試験と同様、比較例は、電池から高確率でガス噴出または熱暴走するが、実施例３１〜実施例３３は、ガス噴出および熱暴走が確認されなかった。   Further, as shown in Table 10, as in the charge test, the comparative example has a high probability of gas ejection or thermal runaway from the battery, but in Examples 31 to 33, gas ejection and thermal runaway were not confirmed. .

なお、充電試験と同様、実施例３１〜実施例３３の電池を解体したところ、正極リードが溶断されており、外部短絡によって、電池に大電流が流れた際に機能していることが確認できた。実施例３４および実施例３５については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては、不十分である。   As in the charge test, when the batteries of Examples 31 to 33 were disassembled, it was confirmed that the positive electrode lead was blown and that it functions when a large current flows through the battery due to an external short circuit. It was. For Example 34 and Example 35, although the probability is lower than that of the comparative example, a case of thermal runaway has been confirmed, which is insufficient as a safety mechanism.

また、表３および表１０に示すように、正極リード材料がＢｉ，Ｐｂの２成分で構成される場合において、Ｐｂの組成が６０重量％よりも小さくなると、材料が脆く加工できなかった。   As shown in Tables 3 and 10, when the positive electrode lead material was composed of two components of Bi and Pb, the material was brittle and could not be processed when the Pb composition was less than 60% by weight.

さらに、表３および表１０に示すように、正極リード材料がＢｉ，Ｐｂの２成分で構成される場合において、Ｐｂの組成が７５重量％を超えると、熱暴走に至ることがわかる。   Further, as shown in Tables 3 and 10, it can be seen that when the positive electrode lead material is composed of two components of Bi and Pb, thermal runaway occurs when the Pb composition exceeds 75% by weight.

表４に示すように、比較例は、充電試験中、電池温度が非常に高温に達し、その後、電池が非常に高い確率で熱暴走に至るのに対し、実施例３６〜実施例３９，実施例４３〜実施例４６，実施例４９〜実施例５２は、電池温度が低く熱暴走に至らないことがわかる。   As shown in Table 4, in the comparative example, the battery temperature reached a very high temperature during the charging test, and then the battery reached a thermal runaway with a very high probability. It can be seen that Examples 43 to 46 and Examples 49 to 52 have a low battery temperature and do not cause thermal runaway.

試験後、実施例３６〜実施例３９，実施例４３〜実施例４６，実施例４９〜実施例５２の電池を解体して調べたところ、正極リードが溶断されており、大電流の充電環境に対しても確実に機能することが確認できた。実施例４０〜実施例４２，実施例４７〜実施例４８については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては不十分である。   After the test, the batteries of Example 36 to Example 39, Example 43 to Example 46, and Example 49 to Example 52 were disassembled and examined. As a result, the positive electrode lead was blown and the battery was charged with a large current. It was confirmed that it works reliably. In Examples 40 to 42 and 47 to 48, although the probability is lower than that of the comparative example, a case of thermal runaway has been confirmed, which is insufficient as a safety mechanism.

また、表１１に示すように、充電試験と同様、比較例は、電池から高確率でガス噴出または熱暴走するが、実施例３６〜実施例３９，実施例４３〜実施例４６，実施例４９〜実施例５２は、ガス噴出および熱暴走が確認されなかった。   Further, as shown in Table 11, as in the charge test, the comparative example has a high probability of gas ejection or thermal runaway from the battery, but Examples 36 to 39, Examples 43 to 46, and Example 49. In Example 52, gas ejection and thermal runaway were not confirmed.

なお、充電試験と同様、実施例３６〜実施例３９，実施例４３〜実施例４６，実施例４９〜実施例５２の電池を解体したところ、正極リードが溶断されており、外部短絡によって、電池に大電流が流れた際に機能していることが確認できた。実施例４０〜実施例４２，実施例４７〜実施例４８については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては、不十分である。   As in the charge test, the batteries of Examples 36 to 39, Examples 43 to 46, and Examples 49 to 52 were disassembled. As a result, the positive electrode lead was blown and the battery was shorted by an external short circuit. It has been confirmed that it is functioning when a large current flows through it. In Examples 40 to 42 and Examples 47 to 48, although the probability is lower than that of the comparative example, a case leading to thermal runaway has been confirmed, which is insufficient as a safety mechanism.

また、表４および表１１に示すように、正極リード材料がＳｎ，Ｐｂ，Ｂｉの３成分で構成される場合において、Ｂｉの組成が２５重量％を超えると、材料が脆く加工できなかった。さらに、Ｐｂの組成が４５重量％より小さくなると、材料が脆く加工できなかった。   Further, as shown in Tables 4 and 11, when the positive electrode lead material is composed of three components of Sn, Pb, and Bi, if the Bi composition exceeds 25% by weight, the material was brittle and could not be processed. Furthermore, when the Pb composition was less than 45% by weight, the material was brittle and could not be processed.

さらに、表４および表１１に示すように、正極リード材料がＳｎ，Ｐｂ，Ｂｉの３成分で構成される場合において、Ｐｂの組成が７０重量％を超えると、熱暴走に至ることがわかる。   Further, as shown in Tables 4 and 11, it can be seen that when the positive electrode lead material is composed of three components of Sn, Pb, and Bi, thermal runaway occurs when the Pb composition exceeds 70% by weight.

表５に示すように、比較例は、充電試験中、電池温度が非常に高温に達し、その後、電池が非常に高い確率で熱暴走に至るのに対し、実施例５３〜実施例５７，実施例６０〜実施例６４，実施例６７〜実施例７１は、電池温度が低く熱暴走に至らないことがわかる。   As shown in Table 5, in the comparative example, the battery temperature reached a very high temperature during the charge test, and then the battery reached thermal runaway with a very high probability. It can be seen that in Examples 60 to 64 and Examples 67 to 71, the battery temperature is low and thermal runaway does not occur.

試験後、実施例５３〜実施例５７，実施例６０〜実施例６４，実施例６７〜実施例７１の電池を解体して調べたところ、正極リードが溶断されており、大電流の充電環境に対しても確実に機能することが確認できた。なお、実施例５８〜実施例５９，実施例６５〜実施例６６については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては不十分である。   After the test, the batteries of Example 53 to Example 57, Example 60 to Example 64, and Example 67 to Example 71 were disassembled and examined. As a result, the positive electrode lead was blown and the battery was charged with a large current. It was confirmed that it works reliably. In Examples 58 to 59 and 65 to 66, although the probability is lower than that of the comparative example, a case of thermal runaway has been confirmed, which is insufficient as a safety mechanism.

また、表１２に示すように、充電試験と同様、比較例は、電池から高確率でガス噴出または熱暴走するが、実施例５３〜実施例５７，実施例６０〜実施例６４，実施例６７〜実施例７１は、ガス噴出および熱暴走が確認されなかった。   Further, as shown in Table 12, as in the charge test, the comparative example has a high probability of gas ejection or thermal runaway from the battery, but Examples 53 to 57, Examples 60 to 64, and Example 67. In Example 71, gas ejection and thermal runaway were not confirmed.

なお、充電試験と同様、実施例５３〜実施例５７，実施例６０〜実施例６４，実施例６７〜実施例７１の電池を解体したところ、正極リードが溶断されており、外部短絡によって、電池に大電流が流れた際に機能していることが確認できた。実施例５８〜実施例５９，実施例６５〜実施例６６については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては、不十分である。   As in the charge test, when the batteries of Examples 53 to 57, Examples 60 to 64, and Examples 67 to 71 were disassembled, the positive electrode lead was blown out, and the battery was shorted by an external short circuit. It has been confirmed that it is functioning when a large current flows through it. In Examples 58 to 59 and 65 to 66, although the probability is low compared to the comparative example, a case of thermal runaway has been confirmed, which is insufficient as a safety mechanism.

また、表５および表１２に示すように、正極リード材料がＩｎ，Ｐｂ，Ｂｉの３成分で構成される場合において、Ｂｉの組成が２５重量％を超えると、材料が脆く加工できなかった。   Further, as shown in Table 5 and Table 12, when the positive electrode lead material was composed of three components of In, Pb, and Bi, when the Bi composition exceeded 25% by weight, the material was brittle and could not be processed.

さらに、表５および表１２に示すように、正極リード材料がＩｎ，Ｐｂ，Ｂｉの３成分で構成される場合において、Ｐｂの組成が７０重量％を超えると、熱暴走に至ることがわかる。   Further, as shown in Tables 5 and 12, it can be seen that when the positive electrode lead material is composed of three components of In, Pb, and Bi, thermal runaway occurs when the Pb composition exceeds 70% by weight.

表６に示すように、比較例は、充電試験中、電池温度が非常に高温に達し、その後、電池が非常に高い確率で熱暴走に至るのに対し、実施例７２〜実施例８５，実施例８８〜実施例９２，実施例９５〜実施例９９は、電池温度が低く熱暴走に至らないことがわかる。   As shown in Table 6, in the comparative example, the battery temperature reached a very high temperature during the charging test, and then the battery reached a thermal runaway with a very high probability. It can be seen that in Examples 88 to 92 and Examples 95 to 99, the battery temperature is low and thermal runaway does not occur.

試験後、実施例７２〜実施例８５，実施例８８〜実施例９２，実施例９５〜実施例９９の電池を解体して調べたところ、正極リードが溶断されており、大電流の充電環境に対しても確実に機能することが確認できた。実施例８６〜実施例８７，実施例９３〜実施例９４，実施例１００〜実施例１０１については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては不十分である。   After the test, the batteries of Example 72 to Example 85, Example 88 to Example 92, and Example 95 to Example 99 were disassembled and examined. As a result, the positive electrode lead was blown and the battery was charged with a large current. It was confirmed that it works reliably. For Examples 86 to 87, 93 to 94, and 100 to 101, the probability of thermal runaway has been confirmed although the probability is lower than that of the comparative example. Is insufficient.

また、表１３に示すように、充電試験と同様、比較例は、電池から高確率でガス噴出または熱暴走するが、実施例７２〜実施例８５，実施例８８〜実施例９２，実施例９５〜実施例９９は、ガス噴出および熱暴走が確認されなかった。   Further, as shown in Table 13, as in the charge test, the comparative example has a high probability of gas ejection or thermal runaway from the battery, but Examples 72 to 85, Example 88 to Example 92, and Example 95. In Example 99, gas ejection and thermal runaway were not confirmed.

なお、充電試験と同様、実施例７２〜実施例８５，実施例８８〜実施例９２，実施例９５〜実施例９９の電池を解体したところ、正極リードが溶断されており、外部短絡によって、電池に大電流が流れた際に機能していることが確認できた。実施例８６〜実施例８７，実施例９３〜実施例９４，実施例１００〜実施例１０１については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては、不十分である。   As in the charge test, when the batteries of Example 72 to Example 85, Example 88 to Example 92, and Example 95 to Example 99 were disassembled, the positive electrode lead was blown out, and the battery was disconnected by an external short circuit. It has been confirmed that it is functioning when a large current flows through it. For Examples 86 to 87, 93 to 94, and 100 to 101, the probability of thermal runaway has been confirmed although the probability is lower than that of the comparative example. Is insufficient.

また、表６および表１３に示すように、正極リード材料がＳｎ，Ｉｎ，Ｂｉの３成分で構成される場合において、Ｂｉの組成が、式（Ｂｉの重量％）≦２５−（Ｓｎ重量％）×０．２５を満たさないと、材料が脆く加工できなかった。   Further, as shown in Table 6 and Table 13, when the positive electrode lead material is composed of three components of Sn, In, and Bi, the composition of Bi is expressed by the formula (wt% of Bi) ≦ 25− (Sn wt%). ) If not satisfying × 0.25, the material was brittle and could not be processed.

さらに、表６および表１３に示すように、正極リード材料がＳｎ，Ｉｎ，Ｐｂの３成分で構成される場合において、Ｐｂの組成が６５重量％を超えると、熱暴走に至ることがわかる。   Furthermore, as shown in Tables 6 and 13, it can be seen that when the positive electrode lead material is composed of three components of Sn, In and Pb, thermal runaway occurs when the Pb composition exceeds 65% by weight.

表７に示すように、比較例は、充電試験中、電池温度が非常に高温に達し、その後、電池が非常に高い確率で熱暴走に至るのに対し、実施例１０２〜実施例１０７，実施例１１０〜実施例１１５，実施例１１８〜実施例１２３は、電池温度が低く熱暴走に至らないことがわかる。   As shown in Table 7, in the comparative example, the battery temperature reached a very high temperature during the charge test, and then the battery reached a thermal runaway with a very high probability. It can be seen that in Examples 110 to 115 and Examples 118 to 123, the battery temperature is low and thermal runaway does not occur.

試験後、実施例１０２〜実施例１０７，実施例１１０〜実施例１１５，実施例１１８〜実施例１２３の電池を解体して調べたところ、正極リードが溶断されており、大電流の充電環境に対しても確実に機能することが確認できた。実施例１０８〜実施例１０９，実施例１１６〜実施例１１７については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては不十分である。   After the test, the batteries of Example 102 to Example 107, Example 110 to Example 115, and Example 118 to Example 123 were disassembled and examined. As a result, the positive electrode lead was blown and the battery was charged with a large current. It was confirmed that it works reliably. In Examples 108 to 109 and Examples 116 to 117, although the probability is lower than that of the comparative example, a case of thermal runaway has been confirmed, which is insufficient as a safety mechanism.

また、表１４に示すように、充電試験と同様、比較例は、電池から高確率でガス噴出または熱暴走するが、実施例１０２〜実施例１０７，実施例１１０〜実施例１１５，実施例１１８〜実施例１２３は、ガス噴出および熱暴走が確認されなかった。   Further, as shown in Table 14, as in the charge test, the comparative example has a high probability of gas ejection or thermal runaway from the battery, but Examples 102 to 107, Examples 110 to 115, and Example 118. In Example 123, gas ejection and thermal runaway were not confirmed.

なお、充電試験と同様、実施例１０２〜実施例１０７，実施例１１０〜実施例１１５，実施例１１８〜実施例１２３の電池を解体したところ、正極リードが溶断されており、外部短絡によって、電池に大電流が流れた際に機能していることが確認できた。実施例１０８〜実施例１０９，実施例１１６〜実施例１１７については、比較例に対して確率は低いものの、熱暴走に至るケースが確認されており、安全機構としては、不十分である。   As in the charge test, the batteries of Example 102 to Example 107, Example 110 to Example 115, and Example 118 to Example 123 were disassembled. It has been confirmed that it is functioning when a large current flows through it. In Examples 108 to 109 and Examples 116 to 117, although the probability is lower than that of the comparative example, a case of thermal runaway has been confirmed, which is insufficient as a safety mechanism.

また、表７および表１４に示すように、正極リード材料がＩｎ，Ｓｎ，Ｐｂ，Ｂｉの４成分で構成される場合において、Ｂｉの組成が２５重量％を超えると、材料が脆く加工できなかった。   As shown in Tables 7 and 14, when the positive electrode lead material is composed of four components of In, Sn, Pb, and Bi, if the Bi composition exceeds 25% by weight, the material is brittle and cannot be processed. It was.

さらに、表７および表１４に示すように、正極リード材料がＩｎ，Ｓｎ，Ｐｂ，Ｂｉの４成分で構成される場合において、Ｐｂの組成が７０重量％を超えると、熱暴走に至ることがわかる。   Further, as shown in Table 7 and Table 14, when the positive electrode lead material is composed of four components of In, Sn, Pb, and Bi, thermal runaway may occur if the composition of Pb exceeds 70% by weight. Recognize.

以上この発明の一実施形態について説明したが、この発明は、上述の一実施形態に限定されるものではなく、この発明の技術的思想に基づく各種の変形が可能である。   Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications based on the technical idea of the present invention are possible.

例えば、上述の一実施形態では、円筒形のリチウム／二硫化鉄一次電池に対してこの発明を適用した例について説明したが、この発明はこの形状の電池に限定されるものではない。   For example, in the above-described embodiment, the example in which the present invention is applied to the cylindrical lithium / iron disulfide primary battery has been described. However, the present invention is not limited to the battery having this shape.

さらに、例えば、正極活物質として酸化第二銅、硫化鉄、鉄複合酸化物、三酸化ビスマス等を用い、負極としては、リチウムに加え、ナトリウム等のアルカリ金属やそれらの合金等を用いた場合も適用可能である。   Furthermore, for example, when cupric oxide, iron sulfide, iron composite oxide, bismuth trioxide, etc. are used as the positive electrode active material, and in addition to lithium, an alkali metal such as sodium or an alloy thereof is used as the negative electrode Is also applicable.

この発明の一実施形態によるリチウム／二硫化鉄一次電池の構成の一例を示す断面図である。It is sectional drawing which shows an example of a structure of the lithium / iron disulfide primary battery by one Embodiment of this invention. この発明の一実施形態によるリチウム／二硫化鉄一次電池の構成の他の例を示す断面図である。It is sectional drawing which shows the other example of a structure of the lithium / iron disulfide primary battery by one Embodiment of this invention.

符号の説明Explanation of symbols

１・・・電池缶
２・・・正極
３・・・負極
４・・・セパレータ
５・・・絶縁板
６・・・絶縁板
７・・・電池蓋
８・・・安全弁
９・・・封口ガスケット
１０・・・正極リード
１１・・・負極リード
１２・・・溶接用部品
DESCRIPTION OF SYMBOLS 1 ... Battery can 2 ... Positive electrode 3 ... Negative electrode 4 ... Separator 5 ... Insulating plate 6 ... Insulating plate 7 ... Battery cover 8 ... Safety valve 9 ... Sealing gasket 10 ... Positive electrode lead 11 ... Negative electrode lead 12 ... Parts for welding

Claims (20)

正極集電体に正極リードが接続され、
上記正極リードの材料である正極リード材料が低融点金属材料であることを特徴とする非水電解液電池。 The positive electrode lead is connected to the positive electrode current collector,
A non-aqueous electrolyte battery, wherein the positive electrode lead material, which is a material of the positive electrode lead, is a low melting point metal material. 請求項１において、
上記正極リード材料の融点が２５０℃以下であることを特徴とする非水電解液電池。 In claim 1,
A nonaqueous electrolyte battery characterized in that the positive electrode lead material has a melting point of 250 ° C. or lower. 請求項１において、
上記正極リード材料がＳｎ，Ｉｎの内から選ばれた１成分で構成されたことを特徴とする非水電解液電池。 In claim 1,
A non-aqueous electrolyte battery characterized in that the positive electrode lead material is composed of one component selected from Sn and In. 請求項１において、
上記正極リード材料がＳｎ，Ｉｎ，Ｂｉ，Ｐｂの内から選ばれた２成分で構成されたことを特徴とする非水電解液電池。 In claim 1,
A non-aqueous electrolyte battery characterized in that the positive electrode lead material is composed of two components selected from Sn, In, Bi, and Pb. 請求項１において、
上記正極リード材料がＳｎ，Ｂｉの２成分で構成され、Ｂｉの組成が５重量％以下であることを特徴とする非水電解液電池。 In claim 1,
A non-aqueous electrolyte battery characterized in that the positive electrode lead material is composed of two components of Sn and Bi, and the composition of Bi is 5% by weight or less. 請求項１において、
上記正極リード材料がＳｎ，Ｐｂの２成分で構成され、Ｐｂの組成が６５重量％以下であることを特徴とする非水電解液電池。 In claim 1,
A nonaqueous electrolyte battery characterized in that the positive electrode lead material is composed of two components of Sn and Pb, and the composition of Pb is 65% by weight or less. 請求項１において、
上記正極リード材料がＩｎ，Ｂｉの２成分で構成され、Ｂｉの組成が２５重量％以下であることを特徴とする非水電解液電池。 In claim 1,
A non-aqueous electrolyte battery characterized in that the positive electrode lead material is composed of two components of In and Bi, and the composition of Bi is 25% by weight or less. 請求項１において、
上記正極リード材料がＩｎ，Ｐｂの２成分で構成され、Ｐｂの組成が７０重量％以下であることを特徴とする非水電解液電池。 In claim 1,
A nonaqueous electrolyte battery characterized in that the positive electrode lead material is composed of two components of In and Pb, and the composition of Pb is 70% by weight or less. 請求項１において、
上記正極リード材料がＢｉ，Ｐｂの２成分で構成され、Ｐｂの組成が６０重量％以上７５重量％以下であることを特徴とする非水電解液電池。 In claim 1,
A nonaqueous electrolyte battery characterized in that the positive electrode lead material is composed of two components of Bi and Pb, and the composition of Pb is 60 wt% or more and 75 wt% or less. 請求項１において、
上記正極リード材料がＳｎ，Ｉｎ，Ｂｉ，Ｐｂの内から選ばれた３成分で構成されたことを特徴とする非水電解液電池。 In claim 1,
A non-aqueous electrolyte battery characterized in that the positive electrode lead material is composed of three components selected from Sn, In, Bi, and Pb. 請求項１において、
上記正極リード材料がＳｎ，Ｂｉ，Ｐｂの３成分で構成され、Ｂｉの組成が２５重量％以下であり、且つＰｂの組成が４５重量％以上７０重量％以下であることを特徴とする非水電解液電池。 In claim 1,
The positive electrode lead material is composed of three components of Sn, Bi, and Pb, the composition of Bi is 25% by weight or less, and the composition of Pb is 45% by weight or more and 70% by weight or less. Electrolyte battery. 請求項１において、
上記正極リード材料がＩｎ，Ｂｉ，Ｐｂの３成分で構成され、Ｂｉの組成が２５重量％以下であり、且つＰｂ組成が７０重量％以下であることを特徴とする非水電解液電池。 In claim 1,
A non-aqueous electrolyte battery characterized in that the positive electrode lead material is composed of three components of In, Bi, and Pb, the composition of Bi is 25% by weight or less, and the Pb composition is 70% by weight or less. 請求項１において、
上記正極リード材料がＳｎ，Ｉｎ，Ｐｂの３成分で構成され、Ｐｂの組成が６５重量％以下であることを特徴とする非水電解液電池。 In claim 1,
A non-aqueous electrolyte battery characterized in that the positive electrode lead material is composed of three components of Sn, In and Pb, and the composition of Pb is 65% by weight or less. 請求項１において、
上記正極リード材料がＳｎ，Ｉｎ，Ｂｉの３成分で構成され、Ｂｉの組成が、
（Ｂｉの重量％）≦２５−（Ｓｎの重量％）×０．２５
を満たすことを特徴とする非水電解液電池。 In claim 1,
The positive electrode lead material is composed of three components of Sn, In and Bi, and the composition of Bi is
(Weight% of Bi) ≦ 25− (Weight% of Sn) × 0.25
The nonaqueous electrolyte battery characterized by satisfy | filling. 請求項１において、
上記正極リード材料がＳｎ，Ｉｎ，Ｂｉ，Ｐｂの４成分で構成されたことを特徴とする非水電解液電池。 In claim 1,
A non-aqueous electrolyte battery characterized in that the positive electrode lead material is composed of four components of Sn, In, Bi, and Pb. 請求項１において、
上記正極リード材料がＳｎ，Ｉｎ，Ｐｂ，Ｂｉの４成分で構成され、Ｐｂの組成が７０重量％以下であることを特徴とする非水電解液電池。 In claim 1,
A non-aqueous electrolyte battery characterized in that the positive electrode lead material is composed of four components of Sn, In, Pb, and Bi, and the composition of Pb is 70% by weight or less. 請求項１において、
上記正極リード材料がＳｎ，Ｉｎ，Ｐｂ，Ｂｉの４成分で構成され、Ｂｉの組成が２５重量％以下であることを特徴とする非水電解液電池。 In claim 1,
A non-aqueous electrolyte battery characterized in that the positive electrode lead material is composed of four components of Sn, In, Pb, and Bi, and the composition of Bi is 25% by weight or less. 請求項１において、
上記正極集電体がＣｕ箔であることを特徴とする非水電解液電池。 In claim 1,
The non-aqueous electrolyte battery, wherein the positive electrode current collector is a Cu foil. 請求項１において、
上記正極リードが正極端子側内部に配置された安全弁に溶接され、
上記安全弁の溶接表面がＣｕであることを特徴とする非水電解液電池。 In claim 1,
The positive lead is welded to a safety valve arranged inside the positive terminal,
A non-aqueous electrolyte battery characterized in that the welding surface of the safety valve is Cu. 請求項１において、
上記正極リードが正極端子側内部に配置された溶接用部品に溶接され、
上記溶接用部品の溶接表面がＣｕであることを特徴とする非水電解液電池。 In claim 1,
The positive electrode lead is welded to a welding part arranged inside the positive electrode terminal side,
A non-aqueous electrolyte battery characterized in that the welding surface of the welding component is Cu.
JP2005249378A 2005-08-30 2005-08-30 Non-aqueous electrolytic liquid battery Pending JP2007066616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005249378A JP2007066616A (en) 2005-08-30 2005-08-30 Non-aqueous electrolytic liquid battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005249378A JP2007066616A (en) 2005-08-30 2005-08-30 Non-aqueous electrolytic liquid battery

Publications (1)

Publication Number Publication Date
JP2007066616A true JP2007066616A (en) 2007-03-15

Family

ID=37928585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005249378A Pending JP2007066616A (en) 2005-08-30 2005-08-30 Non-aqueous electrolytic liquid battery

Country Status (1)

Country Link
JP (1) JP2007066616A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009069266A1 (en) * 2007-11-26 2009-06-04 Panasonic Corporation Nonaqueous electrolyte secondary battery
JP2013089318A (en) * 2011-10-13 2013-05-13 Toyota Industries Corp Secondary battery
CN105229822A (en) * 2013-07-30 2016-01-06 株式会社Lg化学 The lithium secondary battery that fail safe improves

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009069266A1 (en) * 2007-11-26 2009-06-04 Panasonic Corporation Nonaqueous electrolyte secondary battery
JP2009152182A (en) * 2007-11-26 2009-07-09 Panasonic Corp Nonaqueous electrolyte secondary battery
US9093704B2 (en) 2007-11-26 2015-07-28 Panasonic Intellectual Property Management Co., Ltd. Non-aqueous electrolyte secondary battery
JP2013089318A (en) * 2011-10-13 2013-05-13 Toyota Industries Corp Secondary battery
CN105229822A (en) * 2013-07-30 2016-01-06 株式会社Lg化学 The lithium secondary battery that fail safe improves
KR101608631B1 (en) * 2013-07-30 2016-04-05 주식회사 엘지화학 Lithium Secondary Battery having Electrode Terminal Comprising Wood's Metal
JP2016522969A (en) * 2013-07-30 2016-08-04 エルジー・ケム・リミテッド Lithium secondary battery with enhanced safety
US9812692B2 (en) 2013-07-30 2017-11-07 Lg Chem, Ltd. Lithium secondary battery having enhanced safety

Similar Documents

Publication Publication Date Title
CN101626093B (en) Battery
JP5264099B2 (en) Nonaqueous electrolyte secondary battery
JP5003117B2 (en) Batteries and battery units
US10707539B2 (en) Battery
WO2017047353A1 (en) Nonaqueous electrolyte secondary battery
JP2002203553A (en) Positive-electrode active material and non-aqueous electrolyte secondary battery
JP2007227221A (en) Lithium/iron disulphide primary cell
JPH10199574A (en) Nonaqueous electrolyte battery
KR20110018415A (en) Assembled sealing body and battery using same
JP2006344505A (en) Electrolyte solution and battery
JP4952878B2 (en) Primary battery
JP2009129553A (en) Battery
US20060172180A1 (en) Non-aqueous electrolyte secondary battery
WO2017057359A1 (en) Nonaqueous electrolyte secondary battery, electricity storage device, method for manufacturing same, and electricity storage circuit
JP2007128747A (en) Battery
JP2004259547A (en) Nonaqueous electrolyte battery
JP2013016328A (en) Cell
JP4836612B2 (en) Nonaqueous electrolyte battery and battery pack
JP2006100164A (en) Lithium/iron disulfide primary battery
WO2012101693A1 (en) Negative electrode collector for lithium ion batteries, and lithium ion battery
JP2007066616A (en) Non-aqueous electrolytic liquid battery
JP2007042447A (en) Lithium/iron disulphide primary cell
JP2009259749A (en) Nonaqueous electrolyte secondary battery
JP2008021431A (en) Non-aqueous electrolyte secondary battery
JP2000149924A (en) Nonaqueous electrolyte secondary battery