JPH05151993A - Angular type lithium secondary battery - Google Patents
Angular type lithium secondary batteryInfo
- Publication number
- JPH05151993A JPH05151993A JP3315633A JP31563391A JPH05151993A JP H05151993 A JPH05151993 A JP H05151993A JP 3315633 A JP3315633 A JP 3315633A JP 31563391 A JP31563391 A JP 31563391A JP H05151993 A JPH05151993 A JP H05151993A
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- electrode plate
- negative electrode
- segment
- secondary battery
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
-
- 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
- H01M50/531—Electrode connections inside a battery casing
- H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、各種電子機器の電源
として用いられる角型リチウム二次電池に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prismatic lithium secondary battery used as a power source for various electronic devices.
【０００２】[0002]
【従来の技術】従来、小型の二次電池はＯＡ、ＦＡ、家
電、通信等のポータブル電子機器用電源として幅広く使
用されており、さらに、機器に装着した場合に容積効率
がよく、機器の小型化、軽量化につながる角型の二次電
池が要求されている。2. Description of the Related Art Conventionally, small secondary batteries have been widely used as a power source for portable electronic equipment such as office automation equipment, factory automation equipment, home appliances, and communications. There is a demand for prismatic rechargeable batteries that can be made smaller and lighter.
【０００３】図１１は従来の角型ニッケルカドミウム電
池を示す断面図であり、図において２１は活物質２２が
塗布または含浸され、セパレータ（図示せず）と交互に
複数枚配置された集電体、２７は露出した集電体２３と
リード端子２５を介して電気的に集合結合された正極端
子、２８は露出した集電体２４とリード端子２６を介し
て電気的に集合結合された負極端子である。同様の例と
して、電池技術（１９８９，創刊号，ｐ．６２〜８０，
（社）電気化学協会電池技術委員会）に掲載された角型
密閉式ニッケルカドミウム電池が挙げられる。FIG. 11 is a cross-sectional view showing a conventional rectangular nickel-cadmium battery. In the figure, reference numeral 21 is a current collector in which an active material 22 is applied or impregnated and a plurality of current collectors are arranged alternately with separators (not shown). Reference numeral 27 denotes a positive electrode terminal electrically coupled to the exposed current collector 23 via a lead terminal 25, and 28 denotes a negative electrode terminal electrically coupled to the exposed current collector 24 via a lead terminal 26. Is. As a similar example, battery technology (1989, first issue, p. 62-80,
The prismatic sealed nickel-cadmium battery described in (Japan Electrochemical Society Battery Technology Committee) can be mentioned.
【０００４】従来のニッケルカドミウム電池は、上記の
ように角型電池が構成され、機器に挿入した場合に、円
筒型電池では空間になる四隅が、角型電池では容量に寄
与するため、実質的に高エネルギ密度を達成している。In the conventional nickel-cadmium battery, a prismatic battery is constructed as described above, and when it is inserted into a device, the four corners which are spaces in the cylindrical battery contribute to the capacity in the prismatic battery, so that they are substantially effective. Has achieved high energy density.
【０００５】しかし、電池の高性能化の要求から、高エ
ネルギ密度、高電圧、長期保存性に優れたリチウム二次
電池が要求されている。図１２、図１３はそれぞれ角型
リチウム二次電池の正極板および負極板の構造を示す平
面図であり、図において３０はアルミニウムやステンレ
ス等の薄板からなる集電板３１とその集電板３１上に塗
布された再充電可能な活物質３２とからなる正極板、３
３は正極板３０の上部に設けられた集電のための耳部、
４０はリチウム金属あるいはリチウムアルミニウム合金
からなる負極板、４１は負極板４０の上部に設けられた
集電のための耳部である。However, due to the demand for higher performance of the battery, a lithium secondary battery having high energy density, high voltage and excellent long-term storability is required. 12 and 13 are plan views showing the structures of the positive electrode plate and the negative electrode plate of the prismatic lithium secondary battery, respectively. In FIG. 12, reference numeral 30 denotes a current collector plate 31 made of a thin plate such as aluminum or stainless steel and its current collector plate 31. A positive electrode plate comprising a rechargeable active material 32 coated on the above, 3.
3 is an ear portion provided on the positive electrode plate 30 for collecting current,
Reference numeral 40 is a negative electrode plate made of lithium metal or lithium aluminum alloy, and 41 is an ear portion provided on the negative electrode plate 40 for collecting current.
【０００６】上記角型リチウム二次電池は、図１１に示
す角型ニッケルカドミウム電池と同様の構造をとり、正
極板３０と負極板４０とがセパレータを介して交互に複
数枚配置され、正極板３０は耳部３３を集合させて、電
気的に接続されたリード端子２５を介して正極端子２７
に接続し、負極板４０は耳部４１を集合させ電気的に接
続させたリード端子２６を介して電池のケースをかねる
負極端子２８に接続している。The prismatic lithium secondary battery has a structure similar to that of the prismatic nickel-cadmium battery shown in FIG. 11, in which a plurality of positive electrode plates 30 and negative electrode plates 40 are alternately arranged with a separator interposed therebetween. Reference numeral 30 denotes a positive electrode terminal 27 via a lead terminal 25, which is an assembly of the ears 33 and is electrically connected.
The negative electrode plate 40 is connected to the negative electrode terminal 28 which also serves as the case of the battery via the lead terminal 26 in which the ears 41 are assembled and electrically connected.
【０００７】この角型リチウム二次電池は、放電時はリ
チウムがセパレータ中の電解液中にリチウムイオンとし
て溶け出し、そのリチウムイオンが活物質３２と結合
し、充電時は、活物質３２とリチウムとが解離してリチ
ウムイオンとして電解液中に放出され、負極板４０の上
に再析出して、充放電動作を行っている。In this prismatic lithium secondary battery, during discharge, lithium dissolves out into the electrolyte solution in the separator as lithium ions, and the lithium ions combine with the active material 32, and during charge, the active material 32 and lithium are charged. And are dissociated and released into the electrolytic solution as lithium ions, and are re-deposited on the negative electrode plate 40 to perform the charging / discharging operation.
【０００８】[0008]
【発明が解決しようとする課題】従来の角型リチウム二
次電池は以上のように構成されているので、充放電のた
めの繰り返しにより再析出したリチウムが、デントライ
ト（樹枝状）となり、セパレータを突き破り、正極と負
極との局部的な短絡を起こす可能性があり、最悪の場
合、内部の局所的な発熱により発火、破裂に至るという
課題があった。Since the conventional prismatic lithium secondary battery is constructed as described above, the lithium re-deposited by repeated charging and discharging becomes dendrite (dendritic) and the separator There is a possibility that the positive electrode and the negative electrode may be locally short-circuited, and in the worst case, there is a problem that local internal heat generation causes ignition and bursting.
【０００９】この発明は、上記のような課題を解決する
ためになされたもので、内部短絡による電池の発火、破
裂を未然に防止し、電池の損傷を最小限に抑える角型リ
チウム二次電池を得ることを目的とする。The present invention has been made in order to solve the above problems, and prevents the ignition and rupture of the battery due to an internal short circuit, thereby minimizing the damage to the battery. Aim to get.
【００１０】[0010]
【課題を解決するための手段】この発明の第１の発明に
係る角型リチウム二次電池は、プラスチックフィルム上
に、集電部、この集電部に接続形成された複数のヒュー
ズ部および複数のヒューズ部のそれぞれに独立して接続
形成された複数のセグメント電極を形成し、さらにそれ
ぞれのセグメント電極上に独立して正極活物質を積層し
て、正極板を構成するものである。A prismatic lithium secondary battery according to a first aspect of the present invention comprises a plastic film, a current collecting portion, a plurality of fuse portions connected to the current collecting portion, and a plurality of fuse portions. A plurality of segment electrodes are formed so as to be independently connected to each of the fuse parts, and a positive electrode active material is independently laminated on each segment electrode to form a positive electrode plate.
【００１１】また、この発明の第２の発明に係る角型リ
チウム二次電池は、プラスチックフィルム上に、集電
部、この集電部に接続形成された複数のヒューズ部およ
び複数のヒューズ部のそれぞれに独立して接続形成され
た複数のセグメント電極を形成し、さらにそれぞれのセ
グメント電極上に独立して正極活物質あるいは負極活物
質を積層して、正極板および負極板を構成し、これらの
正極板と負極板とを、セパレータを介して、それぞれの
セグメント電極が互いに直交するように、複数枚重ね合
わせて配置するものである。A prismatic lithium secondary battery according to a second aspect of the present invention comprises a plastic film, a current collecting portion, a plurality of fuse portions connected to the current collecting portion, and a plurality of fuse portions. Forming a plurality of segment electrodes that are independently connected to each other, and further stacking a positive electrode active material or a negative electrode active material independently on each segment electrode to form a positive electrode plate and a negative electrode plate. A plurality of positive electrode plates and negative electrode plates are arranged so as to be orthogonal to each other with a separator interposed therebetween so that the segment electrodes are orthogonal to each other.
【００１２】[0012]
【作用】この発明においては、正極板もしくは負極板に
複数のセグメント電極を設け、これらのセグメント電極
のそれぞれにヒューズ部を設けているので、内部短絡の
発生したセグメント電極に設けられたヒューズ部が、正
極板と負極板との内部短絡の発生にともなう短絡電流に
より速やかに溶断され、短絡セグメント電極を電池から
切り放し、電池の発火、破裂を防止できる。In the present invention, a plurality of segment electrodes are provided on the positive electrode plate or the negative electrode plate, and a fuse portion is provided on each of these segment electrodes. Therefore, the fuse portion provided on the segment electrode where the internal short circuit occurs Further, the short circuit current is rapidly melted due to the occurrence of an internal short circuit between the positive electrode plate and the negative electrode plate, the short-circuited segment electrode is cut off from the battery, and it is possible to prevent ignition and rupture of the battery.
【００１３】また、正極板と負極板とのそれぞれに形成
された複数のセグメント電極を互いに直交するように配
置しているので、セグメント電極同士の交差面積が小さ
く、内部短絡によって損なう電池容量を少なく、発生す
る熱量および続流電流も少なくできる。Further, since the plurality of segment electrodes formed on each of the positive electrode plate and the negative electrode plate are arranged so as to be orthogonal to each other, the cross-sectional area between the segment electrodes is small, and the battery capacity lost due to an internal short circuit is small. Also, the amount of heat generated and the continuous current can be reduced.
【００１４】[0014]
【実施例】以下、この発明の実施例を図について説明す
る。 実施例１．図１はこの発明の実施例１を示す角型リチウ
ム二次電池の斜視図であり、図において１は正極端子、
２は角型ケースをかねる負極端子である。Embodiments of the present invention will be described below with reference to the drawings. Example 1. 1 is a perspective view of a prismatic lithium secondary battery showing Embodiment 1 of the present invention, in which 1 is a positive electrode terminal,
Reference numeral 2 is a negative electrode terminal which doubles as a rectangular case.
【００１５】つぎに、上記実施例１における角型リチウ
ム二次電池の内部構造について説明する。図２はこの発
明の実施例１を示す角型リチウム二次電池の内部構造の
斜視図であり、３はその上部一端に欠落部、他端に集電
部を有する正極板、４はその上部一端に欠落部を有する
負極板、５はその上部両端に欠落部を有するセパレー
タ、６は正極板３あるいは負極板４の集電用金属板、６
ａ、６ｂはそれぞれ集電用金属板６の一端に設けられた
正極用リード端子および負極用リード端子である。Next, the internal structure of the prismatic lithium secondary battery in Example 1 will be described. 2 is a perspective view of an internal structure of a prismatic lithium secondary battery showing Embodiment 1 of the present invention, 3 is a positive electrode plate having a cutout portion at one end of the upper portion thereof, and a current collecting portion at the other end thereof, 4 is an upper portion thereof. A negative electrode plate having a cutout portion at one end, 5 a separator having cutout portions at both upper ends thereof, 6 a metal plate for collecting the positive electrode plate 3 or the negative electrode plate 4, 6
Reference numerals a and 6b denote a positive electrode lead terminal and a negative electrode lead terminal, respectively, which are provided at one end of the current collecting metal plate 6.
【００１６】この角型リチウム二次電池は、正極板３の
集電部と負極板４の欠落部とが対向するように、正極板
３とセパレータ５と負極板４とを交互に複数枚重ね合わ
せて配置し、正極板３の集電部同士を集電用金属板６で
電気的に接続し、正極用リード端子６ａを正極端子１に
接続し、また負極板４同士を集電用金属板６で電気的に
接続し、負極用リード端子６ｂを負極端子２に接続して
構成し、セパレータ５には電解液が含浸されている。In this prismatic lithium secondary battery, a plurality of positive electrode plates 3, separators 5 and negative electrode plates 4 are alternately stacked so that the current collecting portion of the positive electrode plate 3 and the lacking portion of the negative electrode plate 4 face each other. The collector portions of the positive electrode plates 3 are electrically connected to each other by the metal plate 6 for collecting current, the lead terminals 6a for positive electrodes are connected to the positive electrode terminals 1, and the negative electrode plates 4 are connected to each other. The plate 5 is electrically connected, and the negative electrode lead terminal 6b is connected to the negative electrode terminal 2. The separator 5 is impregnated with the electrolytic solution.
【００１７】ここで、各構成について詳細に説明する。
図３の（ａ）、（ｂ）はそれぞれこの発明の実施例１に
おける正極板の構造を示す一部破断平面図である。正極
板３は、欠落部３ｆを有するプラスチックフィルム３ａ
の基板上に金属被膜を蒸着形成した後、金属被膜の一部
をエッチングして除去し、図３の（ａ）に示すように、
集電部３ｃと、２個以上のヒューズ部３ｄと、それぞれ
のヒューズ部３ｄに接続され、それぞれが独立して放射
状に同面積の矩冊状パターンのセグメント電極３ｂとを
形成し、さらに、図３の（ｂ）に示すように、集電部３
ｃとヒューズ部３ｄとを除くそれぞれのセグメント電極
３ｂ上に再充電可能な正極活物質３ｅをそれぞれ独立し
て塗布形成して作製している。Here, each component will be described in detail.
3A and 3B are partially cutaway plan views showing the structure of the positive electrode plate according to the first embodiment of the present invention. The positive electrode plate 3 has a plastic film 3a having a missing portion 3f.
After depositing a metal coating on the substrate of No. 3, a part of the metal coating is removed by etching, and as shown in FIG.
A current collecting portion 3c, two or more fuse portions 3d, and each of which is connected to each fuse portion 3d to independently form a segment electrode 3b of a rectangular pattern having the same area in a radial pattern. As shown in (b) of FIG.
The rechargeable positive electrode active material 3e is independently applied and formed on each segment electrode 3b except c and the fuse portion 3d.
【００１８】ここで、正極活物質３ｅとしては、リチウ
ムと複合化したＭｎＯ2、Ｖ2Ｏ5、ＴｉＳ2、ＭｏＳ2等
の酸化物や硫化物、あるいはポリアニリン、ポリピロー
ル等の導電性ポリマー等が用いられる。Here, as the positive electrode active material 3e, oxides and sulfides such as MnO 2 , V 2 O 5 , TiS 2 and MoS 2 complexed with lithium, and conductive polymers such as polyaniline and polypyrrole are used. Used.
【００１９】図４はこの発明の実施例１における負極板
の構造を示す平面図である。負極板４は、リチウムを主
体とする活物質で構成され、前述の正極板３の集電部３
ｃと対向する部分に欠落部４ａを有している。ここで、
活物質としては、リチウム金属、リチウムアルミ合金、
リチウムと他の元素との合金が用いられる。FIG. 4 is a plan view showing the structure of the negative electrode plate according to the first embodiment of the present invention. The negative electrode plate 4 is composed of an active material containing lithium as a main component, and the negative electrode plate 4 has the current collector 3 of the positive electrode plate 3 described above.
It has a missing portion 4a in a portion facing c. here,
As the active material, lithium metal, lithium aluminum alloy,
Alloys of lithium with other elements are used.
【００２０】図５はこの発明の実施例１におけるセパレ
ータの構造を示す平面図である。セパレータ５は、ポリ
プロピレン、ポリエチレン等の微孔性フィルムや不織物
で構成され、性極板３と負極板４の欠落物質３ｆ、４ａ
と対向する部分に欠落部を有している。FIG. 5 is a plan view showing the structure of the separator according to the first embodiment of the present invention. The separator 5 is composed of a microporous film such as polypropylene or polyethylene or a non-woven fabric, and is a missing substance 3f, 4a of the polar plate 3 and the negative electrode plate 4.
It has a missing part in the part facing.
【００２１】図６はこの発明の実施例１における集電用
金属板の構造を示す側面図である。集電用金属板６は、
交互に折り曲げた形状をとり、その一端を正極用、ある
いは負極用リード端子６ａ、６ｂとしている。FIG. 6 is a side view showing the structure of the metal plate for current collection according to the first embodiment of the present invention. The metal plate 6 for collecting current is
It has a bent shape alternately, and one end thereof is used as a positive electrode or negative electrode lead terminal 6a, 6b.
【００２２】ここで、集電用金属板６による集電方法に
ついて説明する。正極板３および負極板４は、セパレー
タ５を介して交互に複数枚重ね合わせて配置されてお
り、図７に示すように、正極板３の集電部３ｃ同士を集
電用金属板６によって機械的にカシメて接続し、さらに
は、図８に示すように、負極板４同士を欠落部４ａの反
対側で集電用金属板６によって機械的にカシメて接続し
ている。Now, a method of collecting current by the metal plate 6 for collecting current will be described. A plurality of the positive electrode plates 3 and the negative electrode plates 4 are alternately stacked with the separators 5 in between, and as shown in FIG. 7, the current collecting portions 3c of the positive electrode plates 3 are separated by the current collecting metal plate 6. Mechanically caulking and connecting, and further, as shown in FIG. 8, the negative electrode plates 4 are mechanically caulking and connected to each other on the opposite side of the cutout portion 4a by the metal plate 6 for current collection.
【００２３】つぎに、上記実施例１の動作について説明
する。放電時は、負極板４からセパレータ５に含浸され
た電解液中にリチウムがイオンとなって溶け出し、その
リチウムイオンが正極板３の正極活物質３ｅと結合し、
充電時は、正極活物質３ｅとリチウムとが解離してリチ
ウムイオンとして電解液中に放出され、負極板４上にリ
チウムが析出して、充放電動作を繰り返すものである。Next, the operation of the first embodiment will be described. At the time of discharge, lithium is dissolved as ions from the negative electrode plate 4 into the electrolytic solution with which the separator 5 is impregnated, and the lithium ions are bonded to the positive electrode active material 3e of the positive electrode plate 3,
During charging, the positive electrode active material 3e and lithium are dissociated and released as lithium ions into the electrolytic solution, lithium is deposited on the negative electrode plate 4, and the charge / discharge operation is repeated.
【００２４】この時、負極板４上に析出するリチウム
は、デンドライト（樹枝状）となり、セパレータ５を突
き破り、正極板３のある１つのセグメント電極３ｂと負
極板４との内部短絡が発生しても、短絡したセグメント
電極３ｂと負極板４とで構成するセグメント電池に、他
のセグメント電池から集中して流れ込む短絡電流による
過大電流によって、短絡したセグメント電池に設けられ
たヒューズ部３ｄが速やかに溶断され、それ以降の他の
セグメント電池からの電流の流れ込みが阻止される。し
たがって、電池容量の損失は、内部短絡したセグメント
電池のみであり、電池の発火、破裂等の最悪の状態を防
ぐことができる。さらに、内部短絡をしたセグメント電
池のみを切り離しているので、電池は再び動作可能とな
る。At this time, the lithium deposited on the negative electrode plate 4 becomes dendrite (dendritic) and penetrates the separator 5, causing an internal short circuit between one segment electrode 3b having the positive electrode plate 3 and the negative electrode plate 4. In addition, the fuse portion 3d provided in the short-circuited segment battery is quickly blown by the excessive current due to the short-circuit current that flows from the other segment batteries to the segment battery composed of the short-circuited segment electrode 3b and the negative electrode plate 4. Then, the inflow of current from other segment batteries thereafter is blocked. Therefore, the loss of the battery capacity is only in the segment battery with the internal short circuit, and it is possible to prevent the worst condition such as the ignition and the explosion of the battery. Further, since only the segment battery having the internal short circuit is disconnected, the battery can be operated again.
【００２５】このように、上記実施例１によれば、複数
の矩冊状のセグメント電極３ｂ、集電部３ｃ、それぞれ
のセグメント電極３ｂと集電部３ｃとをそれぞれ接続す
るヒューズ部３ｄおよびそれぞれのセグメント電極３ｂ
上に独立して塗布形成された正極活物質３ｅをプラスチ
ックフィルム３ａの基板上に形成して正極板３を構成し
ているので、たとえ正極板３と負極板４とが短絡して
も、短絡しているセグメント電池のヒューズ部３ｄのみ
が溶断して、電池の発火、破裂等を未然に防止すること
ができ、安全な角型リチウム二次電池が得られる。As described above, according to the first embodiment, the plurality of rectangular segment electrodes 3b, the current collecting portion 3c, the fuse portions 3d connecting the respective segment electrodes 3b and the current collecting portion 3c, and the respective fuse electrodes 3d. Segment electrode 3b
Even if the positive electrode plate 3 and the negative electrode plate 4 are short-circuited, even if the positive electrode plate 3 and the negative electrode plate 4 are short-circuited, the positive electrode active material 3e that is independently applied and formed on the substrate is formed on the plastic film 3a substrate. Only the fuse portion 3d of the operating segment battery is blown to prevent ignition and rupture of the battery, and a safe prismatic lithium secondary battery is obtained.
【００２６】また、正、負極板３、４の集電を集電用金
属板６を用いて接続する方法を取っているので、極板の
上方の空間を極力小さくすることができ、容積効率の高
い角型リチウム二次電池が得られる。Further, since the current collection of the positive and negative electrode plates 3 and 4 is connected by using the metal plate 6 for current collection, the space above the electrode plate can be made as small as possible, and the volume efficiency is improved. It is possible to obtain a prismatic lithium secondary battery having a high price.
【００２７】実施例２．図９の（ａ）、（ｂ）はそれぞ
れこの発明の実施例２を示す角型リチウム二次電池の正
極板の一部破断平面図であり、正極板３は、欠落部３ｆ
を有するプラスチックフィルム３ａの基板上に金属被膜
を蒸着形成した後、金属被膜の一部をエッチングして除
去し、図９の（ａ）に示すように、集電部３ｃと、２個
以上のヒューズ部３ｄと、それぞれのヒューズ部３ｄに
接続され、それぞれが独立して平行に同面積の矩冊状パ
ターンのセグメント電極３ｂとを形成し、さらに、図９
の（ｂ）に示すように、集電部３ｃとヒューズ部３ｄと
を除くそれぞれのセグメント電極３ｂ上に再充電可能な
正極活物質３ｅをそれぞれ独立して塗布して作製してい
る。Example 2. 9A and 9B are partially cutaway plan views of the positive electrode plate of the prismatic lithium secondary battery showing the second embodiment of the present invention, in which the positive electrode plate 3 has a missing portion 3f.
After forming a metal film by vapor deposition on the substrate of the plastic film 3a having a metal film, a part of the metal film is removed by etching, and as shown in FIG. The fuse portions 3d and the segment electrodes 3b, which are connected to the respective fuse portions 3d and are parallel to each other and have the same area, are formed in parallel with each other.
(B), the rechargeable positive electrode active material 3e is independently applied on each segment electrode 3b excluding the current collecting portion 3c and the fuse portion 3d to manufacture.
【００２８】図１０はこの発明の実施例２を示す角型リ
チウム二次電池の負極板の一部破断平面図である。この
負極板４は、上記正極板３と同様に、欠落部４ａを有す
るプラスチックフィルム４ｂの基板上に、集電部４ｄ
と、２個以上のヒューズ部４ｅと、ヒューズ部４ｅのそ
れぞれに接続され、それぞれが独立して平行に同面積の
矩冊状パターンのセグメント電極４ｃとを形成し、さら
に、リチウムイオンを担持できるカーボン材をこれらの
セグメント電極４ｃ上に塗布形成して、負極活物質４ｆ
としている。ここで、正極板３のセグメント電極３と負
極板４のセグメント電極４ｃとは、矩冊状のパターンが
互いに直交するように形成されている。FIG. 10 is a partially cutaway plan view of a negative electrode plate of a prismatic lithium secondary battery showing a second embodiment of the present invention. Like the positive electrode plate 3, the negative electrode plate 4 has a collector 4d on a substrate of a plastic film 4b having a cutout 4a.
And two or more fuse portions 4e and the segment electrodes 4c connected to each of the fuse portions 4e and having the same area in parallel with each other and having the same area, and can further carry lithium ions. A carbon material is applied on these segment electrodes 4c to form a negative electrode active material 4f.
I am trying. Here, the segment electrode 3 of the positive electrode plate 3 and the segment electrode 4c of the negative electrode plate 4 are formed such that rectangular patterns are orthogonal to each other.
【００２９】上記実施例２では、正極板３と負極板４と
を、セパレータ５を介して、セグメント電極３ｂ、４ｃ
同士が直交するように、交互に複数枚重ね合わせて配置
し、正極板３の集電部３ｃ同士を集電用金属板６によっ
て機械的にカシメて接続し、一方、負極板４の集電部４
ｄ同士を集電用金属板６によって機械的にカシメて接続
し、さらに、集電用金属板６の正極用リード端子６ａお
よび負極用リード端子６ｂを正極端子１および角型ケー
スをかねる負極端子２に接続して、角型リチウム二次電
池を作製している。In the second embodiment, the positive electrode plate 3 and the negative electrode plate 4 are connected via the separator 5 to the segment electrodes 3b and 4c.
Plural sheets are alternately arranged so as to be orthogonal to each other, and the current collecting portions 3c of the positive electrode plate 3 are mechanically caulked and connected by the metal plate 6 for current collection, while the current collection of the negative electrode plate 4 is performed. Part 4
d are mechanically caulked and connected by a current collecting metal plate 6, and further, the positive electrode lead terminal 6a and the negative electrode lead terminal 6b of the current collecting metal plate 6 are used as the positive electrode terminal 1 and the negative electrode terminal also serving as a rectangular case. 2 is connected to produce a prismatic lithium secondary battery.
【００３０】つぎに、上記実施例２の動作について説明
する。放電時は、負極板４からセパレータ５に含浸され
た電解液中にリチウムイオンが溶け出し、そのリチウム
イオンが正極板３の正極活物質３ｅと結合し、一方、充
電時は、正極活物質３ｅとリチウムとが解離してリチウ
ムイオンとして電解液中に放出され、負極板４上にリチ
ウムイオンが担持され、充放電動作が繰り返し行われ
る。この時、正極板３と負極板４との間で、デンドライ
ト状の析出物が発生し、セパレータ５を突き破って、正
極板３と負極板４との間が導通状態になる内部短絡が発
生する場合がある。ここで、負極板４の負極活物質４ｆ
としてカーボン材を用いているので、正常に使用してい
る限りデンドライトによる内部短絡は発生しないが、過
充電等の誤使用や、外部圧力により電池が変形したりす
ると、デンドライトによる内部短絡が発生する可能性が
ある。Next, the operation of the second embodiment will be described. At the time of discharging, lithium ions are dissolved out from the negative electrode plate 4 into the electrolytic solution impregnated in the separator 5, and the lithium ions are bonded to the positive electrode active material 3e of the positive electrode plate 3, while at the time of charging, the positive electrode active material 3e is discharged. And lithium are dissociated and released into the electrolytic solution as lithium ions, the lithium ions are carried on the negative electrode plate 4, and the charging / discharging operation is repeated. At this time, a dendrite-like deposit is generated between the positive electrode plate 3 and the negative electrode plate 4, breaks through the separator 5, and an internal short circuit occurs in which the positive electrode plate 3 and the negative electrode plate 4 are electrically connected. There are cases. Here, the negative electrode active material 4f of the negative electrode plate 4
Since the carbon material is used as a material, an internal short circuit due to the dendrite will not occur as long as it is normally used, but if the battery is deformed due to misuse such as overcharging or due to external pressure, an internal short circuit due to the dendrite occurs. there is a possibility.
【００３１】しかし、デンドライト状の析出物がセパレ
ータ５を突き破り、正極板３のある１つのセグメント電
極３ｂと負極板４のある１つのセグメント電極４ｃとの
内部短絡が発生しても、短絡したセグメント電極３ｂ、
４ｃで構成するセグメント電池に、他のセグメント電池
から集中して流れ込む短絡電流による過大電流によっ
て、短絡したセグメント電池に設けられたヒューズ部３
ｄ、４ｅが速やかに溶断され、それ以降の他のセグメン
ト電池からの電流の流れ込みが阻止される。したがっ
て、電池容量の損失は、内部短絡したセグメント電池の
みであり、電池の発火、破裂等の最悪の状態を防ぐこと
ができる。さらに、内部短絡をしたセグメント電池のみ
を切り離しているので、電池は再び動作可能となる。However, even if a dendrite-like precipitate pierces the separator 5 and an internal short circuit occurs between one segment electrode 3b having the positive electrode plate 3 and one segment electrode 4c having the negative electrode plate 4, the shorted segment Electrode 3b,
The fuse portion 3 provided in the segment battery short-circuited by the excessive current due to the short-circuit current flowing from the other segment batteries in a concentrated manner into the segment battery composed of 4c.
d and 4e are quickly melted, and the subsequent inflow of current from other segment batteries is blocked. Therefore, the loss of the battery capacity is only in the segment battery with the internal short circuit, and it is possible to prevent the worst condition such as the ignition and the explosion of the battery. Further, since only the segment battery having the internal short circuit is disconnected, the battery can be operated again.
【００３２】このように、上記実施例２によれば、複数
の矩冊状のセグメント電極３ｂ、集電部３ｃ、それぞれ
のセグメント電極３ｂと集電部３ｃとをそれぞれ接続す
るヒューズ部３ｄおよびそれぞれのセグメント電極３ｂ
上に独立して塗布形成された正極活物質３ｅをプラスチ
ックフィルム３ａの基板上に形成して正極板３を構成
し、複数の矩冊状のセグメント電極４ｃ、集電部４ｄ、
それぞれのセグメント電極４ｃと集電部４ｄとをそれぞ
れ接続するヒューズ部４ｅおよびそれぞれのセグメント
電極４ｃ上に独立して塗布形成された負極活物質４ｆを
プラスチックフィルム４ｂの基板上に形成して負極板４
を構成し、正極板３と負極板４とをセパレータ５を介し
て、セグメント電極３ｂ、４ｃが互いに直交するよう
に、交互に複数枚重ね合わせて配置しているので、たと
え正極板３と負極板４とが短絡しても、短絡しているセ
グメント電池のヒューズ部３ｄ、４ｅのみが溶断して、
電池の発火、破裂等を未然に防止することができ、安全
な角型リチウム二次電池が得られる。As described above, according to the second embodiment, the plurality of rectangular segment electrodes 3b, the current collecting portion 3c, the fuse portions 3d connecting the respective segment electrodes 3b and the current collecting portion 3c, and the respective fuse electrodes 3d. Segment electrode 3b
The positive electrode active material 3e independently applied and formed on the substrate is formed on the substrate of the plastic film 3a to form the positive electrode plate 3, and a plurality of rectangular segment electrodes 4c, a current collecting portion 4d,
A fuse part 4e for connecting each segment electrode 4c and the current collecting part 4d, and a negative electrode active material 4f independently applied and formed on each segment electrode 4c are formed on a substrate of a plastic film 4b to form a negative electrode plate. Four
Since the positive electrode plate 3 and the negative electrode plate 4 are alternately superposed on each other via the separator 5 so that the segment electrodes 3b and 4c are orthogonal to each other, Even if the plate 4 is short-circuited, only the fuses 3d and 4e of the short-circuited segment battery are blown,
It is possible to prevent ignition and rupture of the battery, and obtain a safe prismatic lithium secondary battery.
【００３３】また、正、負極板３、４の集電を集電用金
属板６を用いて接続する方法を取っているので、極板の
上方の空間を極力小さくすることができ、容積効率の高
い角型リチウム二次電池が得られる。Further, since the positive and negative electrode plates 3 and 4 are connected to each other by using the metal plate 6 for collecting current, the space above the electrode plate can be made as small as possible, and the volumetric efficiency is improved. It is possible to obtain a prismatic lithium secondary battery having a high price.
【００３４】さらに、ヒューズ部３ｄ、４ｅが溶断した
後にセグメント電池内で発生し続ける続流電流は、主に
セグメント電池の正負極が対面交差する部分でしか発生
せず、上記実施例２では、正極板３および負極板４のそ
れぞれに複数のセグメント電極３ｂ、４ｃを設けている
ので、セグメント電極３ｂ、４ｃの交差するセグメント
電池部分を小さくでき、内部短絡によって損なう電池容
量を少なくでき、しかも発生する熱量および続流電流も
少なく、電池の安全性が向上できる。Further, the continuous current that continues to be generated in the segment battery after the fuse portions 3d and 4e are blown is mainly generated only in the portion where the positive and negative electrodes of the segment battery intersect face-to-face. Since each of the positive electrode plate 3 and the negative electrode plate 4 is provided with a plurality of segment electrodes 3b and 4c, the segment battery portion where the segment electrodes 3b and 4c intersect can be made small, and the battery capacity lost due to an internal short circuit can be reduced, and moreover, it can be generated. The amount of heat generated and the follow-up current are small, and the safety of the battery can be improved.
【００３５】なお、上記各実施例では、内部短絡による
動作を説明しているが、ヒューズ部３ｄ、４ｅの金属薄
膜の厚み、パターン幅を調節することにより、外部短絡
によっても動作させることもできる。In each of the above-described embodiments, the operation due to the internal short circuit is described, but the operation can be performed due to the external short circuit by adjusting the thickness and the pattern width of the metal thin films of the fuse portions 3d and 4e. ..
【００３６】また、この発明は、短絡電流によるジュー
ル熱により蒸着金属被膜を溶断することが動作の基本と
なっており、このジュール熱によって電解液の発火、発
熱を誘発しないように、電解液の選定、あるいはヒュー
ズ部３ｄの上面を不燃性樹脂膜等で被覆する等の保護手
段に配慮する必要がある。Further, in the present invention, the operation is basically performed by melting the deposited metal film by Joule heat due to a short circuit current. In order to prevent ignition and heat generation of the electrolyte solution by this Joule heat, It is necessary to consider the protection means such as selection or covering the upper surface of the fuse portion 3d with a nonflammable resin film or the like.
【００３７】[0037]
【発明の効果】この発明は、以上説明したように構成さ
れているので、以下に記載されるような効果を奏する。Since the present invention is constructed as described above, it has the following effects.
【００３８】プラスチックフィルム上に、集電部、この
集電部に接続形成された複数のヒューズ部および複数の
ヒューズ部のそれぞれに独立して接続形成された複数の
セグメント電極を形成しているので、内部短絡が発生し
ても、内部短絡しているセグメント電極に接続するヒュ
ーズ部が短絡電流により速やかに溶断され、短絡セグメ
ント電極を電池から切り放し、電池の発火、破裂を防止
でき、電池の損傷を最小限に抑えることができる。Since the current collector, the plurality of fuses connected to the current collector, and the plurality of segment electrodes independently connected to each of the fuses are formed on the plastic film. Even if an internal short circuit occurs, the fuse part connected to the internally short-circuited segment electrode is quickly blown by the short-circuit current, disconnecting the short-circuited segment electrode from the battery, preventing the battery from igniting and bursting, and damaging the battery. Can be minimized.
【００３９】また、正極板および負極板を構成する各プ
ラスチックフィルム上に、集電部、この集電部に接続形
成された複数のヒューズ部および複数のヒューズ部のそ
れぞれに独立して接続形成された複数のセグメント電極
を形成し、さらにこれらの正極板と負極板とを、セパレ
ータを介して、それぞれのセグメント電極が互いに直交
するように、複数枚重ね合わせて配置しているので、セ
グメント電極同士の交差面積が小さくなり、内部短絡に
よって損なう電池容量を少なくでき、発生する熱量およ
び続流電流も少なくでき、電池の安全性を向上すること
ができる。Further, on each of the plastic films forming the positive electrode plate and the negative electrode plate, a current collecting portion, a plurality of fuse portions connected to the current collecting portion, and a plurality of fuse portions are independently connected and formed. A plurality of segment electrodes are formed, and further, the positive electrode plate and the negative electrode plate are arranged so as to be orthogonal to each other with a separator interposed therebetween. The cross-sectional area can be reduced, the battery capacity lost due to an internal short circuit can be reduced, the amount of heat generated and the follow-up current can be reduced, and battery safety can be improved.
【図１】この発明の実施例１を示す角型リチウム二次電
池の斜視図である。FIG. 1 is a perspective view of a prismatic lithium secondary battery showing a first embodiment of the present invention.
【図２】この発明の実施例１を示す角型リチウム二次電
池内部構造の斜視図である。FIG. 2 is a perspective view of the internal structure of a prismatic lithium secondary battery showing Embodiment 1 of the present invention.
【図３】（ａ）、（ｂ）はそれぞれこの発明の実施例１
を示す角形リチウム二次電池の正極板の構造を説明する
一部破断平面図である。3 (a) and 3 (b) are each a first embodiment of the present invention.
4 is a partially cutaway plan view illustrating the structure of the positive electrode plate of the prismatic lithium secondary battery shown in FIG.
【図４】この発明の実施例１を示す角型リチウム二次電
池の負極板の平面図である。FIG. 4 is a plan view of a negative electrode plate of a prismatic lithium secondary battery showing Example 1 of the present invention.
【図５】この発明の実施例１を示す角型リチウム二次電
池のセパレータの平面図である。5 is a plan view of a separator of a prismatic lithium secondary battery showing Example 1 of the present invention. FIG.
【図６】この発明の実施例１を示す角型リチウム二次電
池の集電用金属板の側面図である。FIG. 6 is a side view of a collector metal plate of the prismatic lithium secondary battery according to the first embodiment of the present invention.
【図７】この発明の実施例１を示す角型リチウム二次電
池の正極集電構造を説明する断面図である。FIG. 7 is a cross-sectional view illustrating a positive electrode current collecting structure of a prismatic lithium secondary battery showing Example 1 of the present invention.
【図８】この発明の実施例１を示す角型リチウム二次電
池の負極集電構造を説明する断面図である。FIG. 8 is a cross-sectional view illustrating a negative electrode current collecting structure of a prismatic lithium secondary battery showing Example 1 of the present invention.
【図９】（ａ）、（ｂ）はそれぞれこの発明の実施例２
を示す角形リチウム二次電池の正極板の構造を説明する
一部破断平面図である。9 (a) and 9 (b) are each a second embodiment of the present invention.
4 is a partially cutaway plan view illustrating the structure of the positive electrode plate of the prismatic lithium secondary battery shown in FIG.
【図１０】この発明の実施例２を示す角型リチウム二次
電池の負極板の構造を説明する一部破断平面図である。FIG. 10 is a partially cutaway plan view illustrating the structure of the negative electrode plate of the prismatic lithium secondary battery showing the second embodiment of the present invention.
【図１１】従来の角型ニッケルカドミウム電池の一例を
示す断面図である。FIG. 11 is a cross-sectional view showing an example of a conventional rectangular nickel-cadmium battery.
【図１２】従来の角型リチウム二次電池の正極板の一例
を示す平面図である。FIG. 12 is a plan view showing an example of a positive electrode plate of a conventional prismatic lithium secondary battery.
【図１３】従来の角型リチウム二次電池の負極板の一例
を示す平面図である。FIG. 13 is a plan view showing an example of a negative electrode plate of a conventional prismatic lithium secondary battery.
３ 正極板 ３ａ プラスチックフィルム ３ｂ セグメント電極 ３ｃ 集電部 ３ｄ ヒューズ部 ３ｅ 正極活物質 ４ 負極板 ４ｂ プラスチックフィルム ４ｃ セグメント電極 ４ｄ 集電部 ４ｅ ヒューズ部 ４ｆ 負極活物質 ５ セパレータ 3 Positive electrode plate 3a Plastic film 3b Segment electrode 3c Current collecting part 3d Fuse part 3e Positive electrode active material 4 Negative electrode plate 4b Plastic film 4c Segment electrode 4d Current collecting part 4e Fuse part 4f Negative electrode active material 5 Separator
───────────────────────────────────────────────────── フロントページの続き (72)発明者 須藤 尚志 千葉県松戸市稔台333番地 東洋高砂乾電 池株式会社開発部内 (72)発明者 望月 康正 千葉県松戸市稔台333番地 東洋高砂乾電 池株式会社開発部内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naoshi Sudo, 333 Minorita, Matsudo City, Chiba Toyo Takasago Dry Electric Battery Co., Ltd. Company Development Department
Claims (2)
をセパレータを介して複数枚重ね合わせて角型容器内に
収納された角型リチウム二次電池において、前記正極板
は、プラスチックフィルム上に、集電部、前記集電部に
接続された複数のヒューズ部および複数の前記ヒューズ
部のそれぞれに互いに独立して接続された複数のセグメ
ント電極が形成され、かつ複数の前記セグメント電極上
に正極活物質が互いに独立して積層されて構成されてい
ることを特徴とする角型リチウム二次電池。1. A prismatic lithium secondary battery in which a plurality of negative electrode plates mainly composed of lithium and positive electrode plates are stacked via a separator and housed in a rectangular container, wherein the positive electrode plate is a plastic film. A current collector, a plurality of fuses connected to the current collector, and a plurality of segment electrodes independently connected to each of the plurality of fuses are formed on the plurality of segment electrodes. A prismatic lithium secondary battery comprising positive electrode active materials laminated independently of each other.
をセパレータを介して複数枚重ね合わせて角型容器内に
収納された角型リチウム二次電池において、前記正極板
は、プラスチックフィルム上に、集電部、前記集電部に
接続された複数のヒューズ部および複数の前記ヒューズ
部のそれぞれに互いに独立して接続された複数のセグメ
ント電極が形成され、かつ複数の前記セグメント電極上
に正極活物質が互いに独立して積層されて構成され、前
記負極板は、プラスチックフィルム上に、集電部、前記
集電部に接続された複数のヒューズ部および複数の前記
ヒューズ部のそれぞれに互いに独立して接続された複数
のセグメント電極が形成され、かつ複数の前記セグメン
ト電極上に負極活物質が互いに独立して積層されて構成
され、前記正極板と前記負極板とを、それぞれの前記セ
グメント電極同士が互いに直交するように重ね合わせて
配置していることを特徴とする角型リチウム二次電池。2. A prismatic lithium secondary battery in which a plurality of negative electrode plates mainly composed of lithium and positive electrode plates are stacked via a separator and housed in a rectangular container, wherein the positive electrode plate is a plastic film. A current collector, a plurality of fuses connected to the current collector, and a plurality of segment electrodes independently connected to each of the plurality of fuses are formed on the plurality of segment electrodes. The positive electrode active material is laminated independently of each other, and the negative electrode plate has a current collector, a plurality of fuses connected to the current collector, and a plurality of fuses connected to each other on the plastic film. A plurality of independently connected segment electrodes are formed, and negative electrode active materials are laminated on the plurality of segment electrodes independently of each other, and the positive electrode plate and A prismatic lithium secondary battery, wherein the negative electrode plate and the segment electrodes are arranged so as to overlap each other so as to be orthogonal to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3315633A JP2942040B2 (en) | 1991-11-29 | 1991-11-29 | Prismatic lithium secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3315633A JP2942040B2 (en) | 1991-11-29 | 1991-11-29 | Prismatic lithium secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05151993A true JPH05151993A (en) | 1993-06-18 |
| JP2942040B2 JP2942040B2 (en) | 1999-08-30 |
Family
ID=18067713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3315633A Expired - Fee Related JP2942040B2 (en) | 1991-11-29 | 1991-11-29 | Prismatic lithium secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2942040B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002071510A1 (en) * | 2001-03-07 | 2002-09-12 | Schneider Electric Industries Sas | Connection device for an electric accumulator |
| JP2011503769A (en) * | 2006-12-21 | 2011-01-27 | ヒューマン， ジャン， ペトルス | Power storage device |
| CN102832393A (en) * | 2011-12-23 | 2012-12-19 | 中航锂电（洛阳）有限公司 | Lithium battery positive plate, preparation method thereof and lithium battery containing positive plate |
| CN108631012A (en) * | 2017-03-20 | 2018-10-09 | 波音公司 | Cell designs for preventing internal short-circuit from occurring and propagating |
-
1991
- 1991-11-29 JP JP3315633A patent/JP2942040B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002071510A1 (en) * | 2001-03-07 | 2002-09-12 | Schneider Electric Industries Sas | Connection device for an electric accumulator |
| FR2821983A1 (en) * | 2001-03-07 | 2002-09-13 | Schneider Electric Ind Sa | CONNECTION DEVICE FOR ELECTRIC BATTERY |
| US7666544B2 (en) | 2001-03-07 | 2010-02-23 | Batscap | Connection device for electric accumulator |
| JP2011503769A (en) * | 2006-12-21 | 2011-01-27 | ヒューマン， ジャン， ペトルス | Power storage device |
| CN102832393A (en) * | 2011-12-23 | 2012-12-19 | 中航锂电（洛阳）有限公司 | Lithium battery positive plate, preparation method thereof and lithium battery containing positive plate |
| CN108631012A (en) * | 2017-03-20 | 2018-10-09 | 波音公司 | Cell designs for preventing internal short-circuit from occurring and propagating |
| CN108631012B (en) * | 2017-03-20 | 2023-08-11 | 波音公司 | Battery, method for storing power using battery, and method for supplying power |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2942040B2 (en) | 1999-08-30 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |