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JP2002324568A - Cell having a plurality of wound pole plates - Google Patents

Cell having a plurality of wound pole plates

Info

Publication number
JP2002324568A
JP2002324568A JP2001126539A JP2001126539A JP2002324568A JP 2002324568 A JP2002324568 A JP 2002324568A JP 2001126539 A JP2001126539 A JP 2001126539A JP 2001126539 A JP2001126539 A JP 2001126539A JP 2002324568 A JP2002324568 A JP 2002324568A
Authority
JP
Japan
Prior art keywords
battery
electrode
electrode plate
wound
group
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
JP2001126539A
Other languages
Japanese (ja)
Inventor
Takashi Ito
伊藤  隆
Toshiki Tanaka
俊樹 田中
Yoshikatsu Otani
佳克 大谷
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.)
Yuasa Corp
Original Assignee
Yuasa Corp
Yuasa Battery 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 Yuasa Corp, Yuasa Battery Corp filed Critical Yuasa Corp
Priority to JP2001126539A priority Critical patent/JP2002324568A/en
Publication of JP2002324568A publication Critical patent/JP2002324568A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Landscapes

  • Secondary Cells (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a cell of high efficiency which has an excellent function to suppress temperature rise even at discharging and which is excellent in charging/discharging cycle. SOLUTION: The cell has a positive pole plate, a separator, and a negative pole plate stacked and wound into a plurality of wound pole plates held between a positive pole collecting terminal and a negative pole collecting terminal. A core of the pole plate is exposed on one side of the positive pole plate and the negative pole plate, and the core of the exposed positive pole plate and that of the negative pole plate are allowed to protrude from a facing wound end surfaces of the pole plates. The protruded core, the positive plate collecting terminal, and the negative plate collecting terminal are welded at the engagement part. A sheet holding an electrolyte abuts on the outer peripheral surface of a plurality of wound pole plates.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、電解液量制限方式
(以下液制限式という)の電池であって、複数個の捲回
式極板群を備え、該複数個の捲回式極板群を相対向する
1対の正極集電端子と負極集電端子の間に狭持させるこ
とによって、並列に接続した発電体(ここでいう発電体
とは、電池の発電もしくは蓄電に関与する部分で、極板
群と集電端子の集合体を指す)を有する電池に関するも
のである。尚、ここでいう液制限式の電池とは、電解液
量をほぼ極板群の液保持量に見合う量に制限し、フリー
の電解液の存在を極力抑えた電池を指す。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery of an electrolytic solution limiting type (hereinafter referred to as a "liquid limiting type"), comprising a plurality of wound electrode groups, and a plurality of wound electrode plates. A power generator connected in parallel by holding the group between a pair of opposed positive and negative electrode current collector terminals (the power generator referred to here is a part involved in power generation or storage of a battery). And a collection of electrode plates and current collecting terminals). Here, the battery of the liquid limiting type refers to a battery in which the amount of the electrolytic solution is almost limited to a value corresponding to the liquid holding amount of the electrode plate group, and the presence of a free electrolytic solution is suppressed as much as possible.

【0002】[0002]

【従来の技術】従来の積層式極板群を備えた電池の内部
構造を図6に示す。図6で発電体60は、図に示すよう
にセパレータ62を介して負極板64および正極板66
を積層した極板群68と、負極板64の一端部および正
極板66の一端部にそれぞれ接合した板状の負極集電端
子70および正極集電端子72とを有している。
2. Description of the Related Art FIG. 6 shows the internal structure of a battery provided with a conventional stacked electrode group. In FIG. 6, the power generator 60 is connected to a negative electrode plate 64 and a positive electrode plate 66 via a separator 62 as shown in FIG.
And a plate-like negative electrode current collecting terminal 70 and a positive electrode current collecting terminal 72 joined to one end of the negative electrode plate 64 and one end of the positive electrode plate 66, respectively.

【0003】これらの負極集電端子70および正極集電
端子72は、負極板64および正極板66の芯体突出面
に当接させて配置すると共に、負極集電端子70および
正極集電端子72の各表面70A、72A(背面に隠れ
ている)にレーザ光若しくは電子線を照射するか、又は
抵抗溶接により負極板64および正極板66の芯体に接
合し、この状態で略箱状の電槽78に収容する。
The negative electrode current collecting terminal 70 and the positive electrode current collecting terminal 72 are arranged in contact with the core projecting surfaces of the negative electrode plate 64 and the positive electrode plate 66, and the negative electrode current collecting terminal 70 and the positive electrode current collecting terminal 72 are arranged. The surface 70A, 72A (hidden on the back surface) is irradiated with a laser beam or an electron beam, or joined to the cores of the negative electrode plate 64 and the positive electrode plate 66 by resistance welding. It is stored in a tank 78.

【0004】前記従来の積層式極板群を備えた電池の場
合、極板群を電槽に収納してはじめて極板群が固定され
位置ずれを起こす虞がなくなる。従って、正極板、セパ
レータおよび負極板を積層した後、集電端子の接合工程
を含めて極板群を電槽に挿入し終わるまで位置ずれを起
こさないよう極板群を両面から押圧して狭持する。
[0004] In the case of a battery provided with the above-mentioned conventional stacked electrode group, the electrode group is not fixed until the electrode group is housed in the battery case, and there is no risk of displacement. Therefore, after laminating the positive electrode plate, the separator and the negative electrode plate, the electrode plate group is pressed from both sides to prevent positional displacement until the electrode plate group is completely inserted into the battery container including the step of joining the current collecting terminals. Carry.

【0005】次いで、所定量の電解液を注液して、液制
限式電池とする。該液制限式電池は、電槽内に電解液を
満たした電池(以下液式電池という)と比較して耐漏液
性能に優れ、軽量でありさらに過充電時等に電池内で発
生するガスの吸収機能に優れる。
[0005] Next, a predetermined amount of electrolyte is injected to obtain a liquid-limited battery. The liquid-limited battery is superior in leak-proof performance and lighter in weight than a battery filled with an electrolytic solution in a battery case (hereinafter referred to as a “liquid battery”). Excellent absorption function.

【0006】但し、液制限式電池は、液式電池に比べ熱
容量が小さくかつ極板群から外部への熱伝導性が劣る。
このため高負荷が加わると極板群で発生した熱が籠も
り、電池温度が上昇し易い欠点がある。例えば、ハイブ
リッド型電気自動車用電池の場合、放電電流が200A
に達する。液制限式電池の場合、電池をこのような高率
で放電させると、液式電池に比べて電池温度の上昇が顕
著である。
However, the liquid-limited type battery has a smaller heat capacity and lower heat conductivity from the electrode plate group to the outside than the liquid-type battery.
For this reason, when a high load is applied, the heat generated in the electrode group is trapped and the battery temperature tends to increase. For example, in the case of a battery for a hybrid electric vehicle, the discharge current is 200 A
Reach In the case of a liquid-limited battery, when the battery is discharged at such a high rate, the battery temperature rises more remarkably than in a liquid battery.

【0007】電気自動車用電源のように大きな出力、大
きなエネルギーが要求される用途には、複数個の電池を
組み合わせた組電池を備えた電池システムを適用し、こ
の電池システムには、空冷もしくは水冷機構を配備して
電池を冷却し、電池の温度が上昇し過ぎない様にしてい
る。しかし、前記従来の積層式極板群を備えた電池の場
合、極板群から外部への放熱機能が十分でなく、高率で
放電させると、放熱が発熱に追いつかず、電池温度が上
昇する欠点があった。
[0007] A battery system having an assembled battery in which a plurality of batteries are combined is applied to an application requiring a large output and a large energy, such as a power supply for an electric vehicle. This battery system is air-cooled or water-cooled. A mechanism is provided to cool the battery and prevent the battery temperature from rising too high. However, in the case of the battery provided with the conventional stacked electrode group, the function of dissipating heat from the electrode group to the outside is not sufficient, and when discharging at a high rate, the heat radiation does not catch up with the heat generation, and the battery temperature increases. There were drawbacks.

【0008】[0008]

【発明が解決しようとする課題】高率放電が短時間で終
了する時は、電池の冷却機構が作動して、電池温度は規
定内に維持される。しかし、電気自動車用電源におい
て、登坂や加速の時のように連続して大きな負荷がかか
る場合、冷却機能が電池の発熱に追いつかず電池温度が
上昇する虞がある。
When the high-rate discharge is completed in a short time, the battery cooling mechanism is activated, and the battery temperature is maintained within the specified range. However, when a large load is continuously applied to the electric vehicle power supply, such as when climbing a hill or accelerating, the cooling function may not catch up with the heat generated by the battery, and the battery temperature may increase.

【0009】電池温度の上昇は、電池の性能劣化や電池
内圧の上昇を招くので、性能面や安全面で好ましくな
い。殊にニッケル・水素蓄電池やニッケル・カドミウム
電池の場合、回生充電効率が低下して、充電時に正極で
酸素が発生する。該酸素発生により電池内圧が上昇し
て、圧力が規定値を超えるとガス排出弁が作動して酸素
を外部に放出する。さらに、酸素によって負極の水素吸
蔵合金やカドミウムが酸化する。前記ガスの放出や負極
の酸化は、容量の低下を招くので好ましくない。
[0009] An increase in battery temperature causes deterioration of battery performance and an increase in battery internal pressure, which is not preferable in terms of performance and safety. In particular, in the case of a nickel-hydrogen storage battery or a nickel-cadmium battery, the regenerative charging efficiency is reduced, and oxygen is generated at the positive electrode during charging. The internal pressure of the battery rises due to the generation of oxygen, and when the pressure exceeds a specified value, the gas discharge valve operates to release oxygen to the outside. Further, oxygen oxidizes the hydrogen storage alloy and cadmium of the negative electrode. The release of the gas and the oxidation of the negative electrode are not preferable because they cause a decrease in capacity.

【0010】また、前記の如く積層式極板群を適用する
場合、極板群に位置ずれを起こさせずに積層状態を保持
しようとすると、正極板、セパレータおよび負極板を積
層後一貫して極板群を押圧狭持する必要があり、極板が
大きくになるに従い積層体の保持が難しくなる欠点があ
った。このため、大きな容量の電池に於いて、重ねた極
板やセパレータが位置ずれを起こしにくい極板群の適用
が求められていた。
In the case where the stacked electrode group is applied as described above, if the stacked state is to be maintained without causing the electrode group to be misaligned, the positive electrode plate, the separator, and the negative electrode plate must be consistently stacked after being stacked. It was necessary to press and hold the electrode plate group, and there was a disadvantage that the larger the electrode plate, the more difficult it was to hold the laminate. For this reason, in a battery having a large capacity, application of an electrode plate group in which a stacked electrode plate or a separator is unlikely to be displaced has been demanded.

【0011】本発明は、前記従来電池の欠点に鑑み成さ
れたものであって、前記従来の電池が備えている電池の
冷却機構以外に、電池内の極板群の構造改良によって極
板群の放熱機能を高め、さらに極板群の積層状態の維持
を容易にするものであって、前記従来電池の欠点を解決
しようとするものである。
The present invention has been made in view of the above-mentioned drawbacks of the conventional battery. In addition to the battery cooling mechanism provided in the conventional battery, the present invention has been made by improving the structure of the electrode group in the battery. The purpose of the present invention is to improve the heat dissipation function of the above and further facilitate the maintenance of the laminated state of the electrode group, and to solve the drawbacks of the conventional battery.

【0012】[0012]

【課題を解決するための手段】本発明に係る電池は、正
極板、セパレータおよび負極板を重ね捲回して成る複数
個の捲回式極板群を備えた電池であって、前記正極板の
芯体および負極板の芯体が極板群の一方の端面に露出し
ており、該正極板の芯体と負極板の芯体とが、極板群の
相対向する二面に突出しており、該極板群を、これと対
面部を有し向かい合う1対の正極集電端子と負極集電端
子とで狭持し、該集電端子と前記芯体とを、係合部にお
いて溶接して成る複数個の捲回式極板群を備えた電池で
ある。
The battery according to the present invention is a battery provided with a plurality of wound type electrode groups formed by stacking and winding a positive electrode plate, a separator and a negative electrode plate. The core body and the core body of the negative electrode plate are exposed at one end surface of the electrode plate group, and the core body of the positive electrode plate and the core body of the negative electrode plate protrude from two opposing surfaces of the electrode plate group. , The electrode plate group is sandwiched between a pair of positive and negative electrode current collecting terminals facing each other and facing each other, and the current collecting terminal and the core are welded at an engaging portion. Provided with a plurality of wound electrode plates.

【0013】本発明に係る電池においては、極板群の積
層状態の維持を容易にするために捲回式極板群を適用す
る。平板型積層式極板群の場合は、極板群を両面から押
圧して保持しないと極板およびセパレータの位置ずれが
生じるが、前記捲回式極板群の場合は、巻終わり部分を
固定しさえすれば、巻が緩むことがなく極板およびセパ
レータの位置ずれ発生を防止できる利点がある。
[0013] In the battery according to the present invention, a wound electrode group is applied in order to easily maintain the laminated state of the electrode group. In the case of the plate-type laminated electrode group, if the electrode group is not pressed and held from both sides and the electrode plate and the separator are misaligned, in the case of the wound electrode group, the winding end portion is fixed. As long as this is done, there is an advantage that the displacement of the electrode plate and the separator can be prevented without the winding being loosened.

【0014】本発明電池においては、捲回式極板群とし
て捲回端面の形状が円形の他、楕円形や扁平形状のもの
が適用できる。そして、通電に伴って発生した熱が極板
群に籠もらないようにするために、前記捲回式極板群の
直径(捲回端面形状が円の場合)もしくは短径(捲回端
面形状が楕円や扁平の場合)を小さくする。それと共
に、複数個の極板群を備えることによって、所定の容量
を確保する。
In the battery of the present invention, an electrode group having a wound end face other than a circular shape, an elliptical shape, or a flat shape can be applied as a wound type electrode plate group. Then, in order to prevent heat generated due to energization from being trapped in the electrode plate group, the diameter (when the wound end surface shape is circular) or the short diameter (the wound end surface shape) of the wound electrode plate group is used. (When is an ellipse or flat). At the same time, a predetermined capacity is ensured by providing a plurality of electrode plate groups.

【0015】捲回端面が円形の捲回式極板群の場合、外
周面が円弧状なので、複数個の極板群を接触させて(す
なわち極板群と極板群の外周面の間隔が0mm)配置し
ても点接触であり、間に隙間が生じるので、熱が籠もり
にくい利点がある。極板群の間の間隔が大きと過ぎると
容積効率が低下する以外に後述の如くサイクル性能に悪
影響を及ぼす。捲回端面の形状が円形の場合、前記間隔
は8mm未満、さらには5mm以下に設定することが望
ましい。
In the case of a wound electrode group having a wound end surface having a circular shape, since the outer peripheral surface is in an arc shape, a plurality of electrode groups are brought into contact with each other (that is, the interval between the outer peripheral surfaces of the electrode group and the electrode group is reduced. 0 mm), it is point contact even if it is arranged, and there is a gap between the two. If the distance between the electrode groups is too large, not only the volume efficiency is reduced but also the cycle performance is adversely affected as described later. When the shape of the wound end face is circular, it is desirable to set the interval to less than 8 mm, and more preferably to 5 mm or less.

【0016】楕円形もしくは扁平形状の捲回端面を有す
る極板群を適用する場合は、電池の容積効率がなるべく
高くなるよう、捲回端面の長軸が平行になるように複数
の極板群を配置する。捲回端面が楕円形や扁平型の複数
の極板群を長軸に平行な外周面同志を接触させて配置す
ると、前記円形の場合と異なり、極板群同志の間に隙間
を確保することができない虞がある。この場合には、後
記の理由によって極板群同志の間に1mm以上8mm未
満、さらには1〜5mmの間隔を設けることが望まし
い。ここでいう間隔とは、2つの極板群の外周面同志の
最短距離指す。
When an electrode group having an elliptical or flat wound end face is applied, a plurality of electrode groups are arranged such that the long axis of the wound end face is parallel so that the volumetric efficiency of the battery is as high as possible. Place. If a plurality of elliptical or flat electrode plates are arranged such that the outer peripheral surfaces parallel to the long axis are in contact with each other, unlike the circular case, a gap is secured between the electrode plates. May not be possible. In this case, it is desirable to provide an interval of 1 mm or more and less than 8 mm, more preferably 1 to 5 mm, between the electrode groups for the reasons described below. Here, the interval refers to the shortest distance between the outer peripheral surfaces of the two electrode groups.

【0017】また、本発明は液制限式電池に関するもの
であって、本発明電池に於いては、前記複数個の捲回式
極板群の、各々の極板群の表面に電解液を保持させたシ
ートを当接させる。極板群の表面に電解液で保持させた
シートを当接することにより、極板群の液涸れを防止で
きる。電解液含浸シートから極板群内への電解液の移行
を容易にするためには、極板群を構成する帯状セパレー
タを極板より長く設定し、捲回した極板群の外周面にセ
パレータを露出させ、該セパレータの露出部分に前記電
解液含浸シートを当接させることが望ましい。
Further, the present invention relates to a liquid-limited battery. In the battery of the present invention, an electrolyte is held on the surface of each of the plurality of wound electrode groups. The sheet that has been made to abut is brought into contact. By contacting the sheet held by the electrolyte with the surface of the electrode group, it is possible to prevent the electrode group from drying out. To facilitate the transfer of the electrolyte from the electrolyte impregnated sheet into the electrode group, the band-shaped separator constituting the electrode group is set to be longer than the electrode plate, and the separator is provided on the outer peripheral surface of the wound electrode group. , And the electrolyte-impregnated sheet is preferably brought into contact with the exposed portion of the separator.

【0018】前記のように、極板群と電解液含浸シート
を当接させることによって、極板群が発熱し異常に昇温
した時に、前記シートに含まれた電解液が蒸発しその際
に極板群から潜熱を奪うので、極板群を冷却する効果が
ある。
As described above, by bringing the electrode group into contact with the electrolyte impregnated sheet, when the electrode group generates heat and abnormally rises in temperature, the electrolyte contained in the sheet evaporates. Since the latent heat is taken from the electrode group, there is an effect of cooling the electrode group.

【0019】[0019]

【発明の実施の形態】図1は、捲回式極板群10の斜視
図である。図で帯状のセパレータ12を帯状の負極板1
4と帯状の正極板16の間に介在させ、巻芯18の周囲
に捲回して極板群とする。図の上側に正極板の一方の側
辺(図では上側側辺)に芯体17、負極板の一方の側辺
(図では下側側辺)に芯体15を突出させる。該極板群
においては、平板型極板群と異なり、巻終わり部分を粘
着テープ等で固定して、巻が緩まないようにさえすれば
極板がずれることが無いので保持が容易である。
FIG. 1 is a perspective view of a wound electrode plate group 10. FIG. In the figure, the strip-shaped separator 12 is replaced with the strip-shaped negative electrode plate 1.
4 and a belt-like positive electrode plate 16 and wound around the core 18 to form an electrode plate group. On the upper side of the figure, the core 17 is projected on one side (upper side in the figure) of the positive electrode plate, and the core 15 is projected on one side (lower side in the figure) of the negative electrode plate. In the electrode group, unlike the flat-type electrode group, the end of the winding is fixed with an adhesive tape or the like so that the winding is not loosened.

【0020】図2は、図1に示した捲回端面が円形状の
捲回式極板群10を4個並べ、該極板群10を負極集電
端子1と正極集電端子2に狭持させた、セルの発電体を
示す図である(極板群10が集電端子の陰に隠れるのを
避けるために、負極集電端子をわざと離してある)。前
記極板群の捲回端面に突出させた正極板の芯体と正極集
電端子、負極板の芯体と負極集電端子の係合部を溶接に
よって接合して発電体を構成する。負極および正極集電
端子の上辺に突部を設け、該突部にはセル間接続部材ま
たは外部端子を装着するための貫通孔を設けている。
FIG. 2 shows four wound electrode plates 10 each having a circular wound end face as shown in FIG. 1, and the electrode plate 10 is narrowed to the negative current collecting terminal 1 and the positive current collecting terminal 2. FIG. 3 is a view showing a power generator of the cell held by the battery (a negative electrode current collecting terminal is intentionally separated in order to prevent the electrode group 10 from being hidden behind a current collecting terminal). The core of the positive electrode plate protruding from the wound end face of the electrode plate group and the positive current collecting terminal, and the engaging portion of the core of the negative electrode plate and the negative current collecting terminal are joined by welding to form a power generator. Protrusions are provided on the upper sides of the negative and positive electrode current collector terminals, and the protrusions are provided with through holes for mounting inter-cell connecting members or external terminals.

【0021】図2の例では、極板群を離して配置してい
るが、円形状の捲回端面を有する捲回式極板群を適用す
る場合には、極板群同志を接触させてもよい。極板群の
外周面が円弧状なので、極板群同志を接触させても、隣
合う極板群の間には、隙間が確保される。本発明に係る
電池の場合、前記極板群の外周面に、後述の電解液を含
浸したシートを当接させ、発電体を電槽4に挿入してセ
ルを構成する。
In the example shown in FIG. 2, the electrode groups are arranged apart from each other. However, when a wound electrode group having a circular wound end surface is applied, the electrode groups are brought into contact with each other. Is also good. Since the outer peripheral surface of the electrode group is arc-shaped, a gap is secured between adjacent electrode groups even when the electrode groups are brought into contact with each other. In the case of the battery according to the present invention, a sheet impregnated with an electrolyte described below is brought into contact with the outer peripheral surface of the electrode group, and a power generator is inserted into the battery case 4 to constitute a cell.

【0022】図3は、捲回端面の形状が楕円もしくは扁
平形状の捲回式極板群10を適用した発電体の構造を説
明するための説明図である。ここで適用する捲回式極板
群の構造は、前記円筒型極板群と基本的に同一である。
また、複数個の捲回式極板群を1対の正極集電端子と負
極集電端子の間に配置し、極板の芯体と集電端子を溶接
にて接合する発電体の構造も図2に示したものと同一で
ある。但し、捲回端面が円形の場合と異なり、長径に平
行な極板群の側面が平面に近くなる。このため、極板群
同志を接触させると、極板群相互の間に隙間が確保でき
ない。従って、捲回端面の形状が楕円もしくは扁平形状
の極板群においては、極板群に熱が籠もらないように、
極板群と極板群の間に1mm以上8mm未満、さらには
1〜5mmの間隔を設けることが望ましい。
FIG. 3 is an explanatory view for explaining the structure of a power generating body to which a wound electrode plate group 10 having an elliptical or flattened wound end face is applied. The structure of the wound electrode group applied here is basically the same as that of the cylindrical electrode group.
Further, there is also a structure of a power generating body in which a plurality of wound electrode groups are arranged between a pair of a positive electrode current collecting terminal and a negative electrode current collecting terminal, and the core of the electrode plate and the current collecting terminal are joined by welding. It is the same as that shown in FIG. However, unlike the case where the wound end surface is circular, the side surface of the electrode plate group parallel to the long diameter becomes nearly flat. Therefore, when the electrode groups are brought into contact with each other, a gap cannot be secured between the electrode groups. Therefore, in the electrode group in which the shape of the wound end surface is elliptical or flat, so that heat does not remain in the electrode group,
It is desirable to provide an interval of 1 mm or more and less than 8 mm, and more preferably 1 to 5 mm between the electrode plate groups.

【0023】図4は、前記図2に示した4個の捲回式極
板群を備えた、発電体を正面から見た図である。セパレ
ータを極板より長くして、前記極板群の外周面には少な
くとも1周セパレータのみを捲回している。前記4個の
極板群10の周囲を少なくとも1周電解液電解液を含浸
したシート5で囲み、極板群10と電解液含浸シート5
を当接させている。
FIG. 4 is a front view of a power generator provided with the four wound electrode plates shown in FIG. The separator is longer than the electrode plate, and at least one round of the separator is wound around the outer peripheral surface of the electrode plate group. At least one round of the periphery of the four electrode groups 10 is surrounded by a sheet 5 impregnated with the electrolytic solution, and the electrode group 10 and the electrolyte impregnated sheet 5
Is abutted.

【0024】図5は、6個のセルを1個の電槽4に収納
したモノブロック電池の内部を説明するための図であ
る。各々のセルには図4で示した発電体(見易くするた
めに電解液含浸シートを省略した)が収納してあり、隣
合うセルとセルは前記集電端子の突部および電槽の隔壁
に設けた貫通孔を通して装着したセル間接続部材(見易
くするために省略した)で直列に接続してある。また、
両端のセルの負極集電端子30cと正極集電端子30b
には、それぞれ負極端子、正極端子を装着する。
FIG. 5 is a diagram for explaining the inside of a monobloc battery in which six cells are housed in one battery case 4. Each cell contains the power generator shown in FIG. 4 (the electrolyte impregnated sheet is omitted for clarity), and the adjacent cells and cells are located at the protrusion of the current collecting terminal and the partition of the battery case. They are connected in series by inter-cell connecting members (not shown for clarity) mounted through the provided through holes. Also,
The negative electrode current collecting terminal 30c and the positive electrode current collecting terminal 30b of the cells at both ends.
Are equipped with a negative electrode terminal and a positive electrode terminal, respectively.

【0025】[0025]

【実施例】以下アルカリ蓄電池を例に採り上げ、その一
実施例に基づいて本発明の詳細を説明する。なお、本発
明の形状、部品の材質等は、以下に記述する例に限定さ
れるものではない。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment using an alkaline storage battery as an example. In addition, the shape of the present invention, the material of the parts, and the like are not limited to the examples described below.

【0026】(実施例1)厚さ0.1mm、側辺端部に
設けた幅2mmの芯体露出部を有する厚さ0.6mm、
幅40mm、長さ180mmの焼結式ニッケル正極板を
2つ折りにした厚さ150μmのポリプロピレン製帯状
セパレータで挟み込み、該正極と厚さ0.06mm、側
辺に設けた幅2mmの芯体露出部を有する厚さ0.4m
m、幅40mm、長さ200mmのペースト式水素吸蔵
合金負極板を、それぞれの芯体露出部が両サイドに突出
するように配置し、該極板およびセパレータを捲回し
て、図1に示した直径15mm、幅42mmの捲回端面
が円形の捲回式極板群を作製した。尚、前記ポリプロピ
レン製帯状セパレータを極板より長くし、極板群の外周
面に1周セパレータのみの捲回部分を設けた。
(Example 1) A thickness of 0.1 mm, a thickness of 0.6 mm having a core exposed portion having a width of 2 mm provided at an end of a side edge,
A sintered nickel positive electrode plate having a width of 40 mm and a length of 180 mm is sandwiched between folded 150-μm-thick polypropylene strip separators, and the positive electrode is exposed to a thickness of 0.06 mm and a core exposed portion having a width of 2 mm provided on a side. 0.4m thick with
m, a width of 40 mm, and a length of 200 mm, a paste-type hydrogen-absorbing alloy negative electrode plate was arranged such that the respective core exposed portions protruded on both sides, and the electrode plate and the separator were wound, as shown in FIG. A wound electrode plate group having a diameter of 15 mm and a width of 42 mm and having a circular wound end surface was prepared. The strip-shaped polypropylene separator was made longer than the electrode plate, and a wound portion of only one turn of the separator was provided on the outer peripheral surface of the electrode plate group.

【0027】前記捲回式極板群4個を、それぞれの間隔
が3mmになるよう一列に配置した。極板群の一方の捲
回端面に突出させた正極板の芯体に厚さ0.6mm、幅
15.2mm、長さ85mmのニッケル製集電端子を当
接し、レーザ溶接により接合した。さらに、対向面に突
出させた負極板の芯体に前記と同一サイズ、同一材質の
負極集電端子を接合して、4個の極板群を備えた発電体
を構成した。該4個の極板群の周囲に厚さ120μmの
親水処理を施したポリプロピレン製不織布を2周させ、
シートの端を固定した。
The four wound type electrode plates were arranged in a line so that the interval between them was 3 mm. A nickel current collecting terminal having a thickness of 0.6 mm, a width of 15.2 mm, and a length of 85 mm was brought into contact with the core of the positive electrode plate protruding from one of the wound end surfaces of the electrode plate group, and was joined by laser welding. Furthermore, a negative electrode current collector terminal of the same size and the same material as described above was joined to the core of the negative electrode plate protruding from the opposing surface to form a power generator having four electrode groups. Around a circumference of the four electrode plate groups, a nonwoven fabric made of polypropylene having a thickness of 120 μm and subjected to a hydrophilic treatment is rotated twice,
The edge of the sheet was fixed.

【0028】4個の捲回式極板群を備え、該極板群の外
周面に前記電解液を含浸した不織布を巻いた発電体6組
を電槽に挿入し、セル同志をセル間接続部材でシリーズ
に接続し、6セルから成るモノブロック型電池を構成し
た。各セルに所定濃度の苛性カリ水溶液を主成分とする
アルカリ電解液を所定量注入した後、ガス排出弁を備え
た蓋を装着して密閉し、電圧7.2V、容量6.5Ah
の液制限式電池とした。
[0028] Six sets of power generating bodies, each of which is provided with four wound electrode groups, and in which the non-woven fabric impregnated with the electrolytic solution is wound on the outer peripheral surface of the electrode groups, are inserted into a battery case, and the cells are connected to each other. The members were connected in series to form a monoblock battery composed of 6 cells. After injecting a predetermined amount of an alkaline electrolyte containing a caustic potassium aqueous solution of a predetermined concentration as a main component into each cell, a lid equipped with a gas discharge valve was attached and sealed, and the voltage was 7.2 V and the capacity was 6.5 Ah.
Liquid limiting type battery.

【0029】(実施例2)実施例1において極板群同志
の間隔を0mm(極板群の外周面同志が接触している)
となるように配置した。その他は実施例1と同一の構成
とする電池を作製した。
(Embodiment 2) In Embodiment 1, the interval between the electrode groups is 0 mm (the outer peripheral surfaces of the electrode groups are in contact with each other).
It was arranged so that it might become. Otherwise, a battery having the same configuration as in Example 1 was produced.

【0030】(実施例3)実施例1において、極板群同
志の間隔を5mmとなるように配置した。その他は実施
例1と同一の構成とする電池を作製した。
(Example 3) In Example 1, the electrode plates were arranged so that the interval between them was 5 mm. Otherwise, a battery having the same configuration as in Example 1 was produced.

【0031】(実施例4)実施例1において、極板群同
志の間隔を8mmとなるように配置した。その他は実施
例1と同一の構成とする電池を作製した。
(Example 4) In Example 1, the electrode groups were arranged so that the interval between them was 8 mm. Otherwise, a battery having the same configuration as in Example 1 was produced.

【0032】(比較例1)前記実施例1において、極板
群の外周面にポリプロピレン製不織布を配置しなかった
以外は実施例と同一の構成のモノブロック型電池を作製
した。
Comparative Example 1 A monoblock battery having the same structure as in Example 1 except that no polypropylene nonwoven fabric was arranged on the outer peripheral surface of the electrode plate group was prepared.

【0033】(比較例2)側辺に厚さ0.1mm、幅2
mmの芯材を露出させた厚さ0.6mm、幅40mm、
高さ70mmの焼結式ニッケル正極板と、側辺に厚さ
0.06mm、幅2mmの芯材を露出させた厚さ0.4
mm、幅40mm、高さ70mmのペースト式水素吸蔵
合金負極板および厚さ150μmのポリプロピレン不織
布製セパレータを用意した。間にセパレータを介して正
極板12枚と負極板13枚を積層し、厚さ15mm、幅
42mm、高さ60mmの積層式極板群とした。該積層
式の極板群の、電極およびセパレータの位置がずれない
ように、極板群を保持しながら側辺に突出させた正極板
の芯体および負極板の芯体にそれぞれ正極集電端子、負
極集電端子を当接しレーザー溶接にて接合し、単電池の
極板群とした。該極板群6個を用意し、実施例1と同様
6セルをシリーズに接続したモノブロック型の液制限式
電池を作製した。実施例電池と同様、電池電圧を7.2
V、容量を6.5Ahに設定した。
(Comparative Example 2) Thickness 0.1 mm, width 2 on the side
0.6mm thickness, 40mm width, exposing the core material of mm
A sintered nickel positive electrode plate having a height of 70 mm and a core material having a thickness of 0.06 mm and a width of 2 mm exposed on the side sides and a thickness of 0.4.
A paste-type hydrogen storage alloy negative electrode plate having a thickness of 40 mm and a width of 40 mm and a height of 70 mm, and a polypropylene nonwoven fabric separator having a thickness of 150 μm were prepared. Twelve positive electrode plates and thirteen negative electrode plates were laminated with a separator interposed therebetween to form a laminated electrode group having a thickness of 15 mm, a width of 42 mm, and a height of 60 mm. The positive electrode current collector terminals are respectively provided on the positive electrode plate core and the negative electrode plate core protruding to the side while holding the electrode group so that the positions of the electrodes and the separator of the laminated electrode group do not shift. Then, the negative electrode current collecting terminals were brought into contact with each other and joined by laser welding to form a group of electrodes of a unit cell. Six electrode plates were prepared, and a monoblock-type liquid-limited battery in which six cells were connected in series as in Example 1 was produced. As in the case of the example battery, the battery voltage was set to 7.2.
V and the capacity were set to 6.5 Ah.

【0034】(電池の活性化)これらの電池をそれぞれ
温度25℃において0.2It(A){注1It(A)
=C5(Ah)/1h}の電流で充放電を実施した。該
充放電操作を5回繰り返して電池を活性化した。
(Activation of batteries) Each of these batteries was heated at a temperature of 25 ° C. for 0.2 It (A) ANote 1 It (A)
= C5 (Ah) / 1h}. The charge / discharge operation was repeated five times to activate the battery.

【0035】(放電時の電池温度調査)前記活性化した
電池を各率で放電し、その時の電池温度を測定した。放
電試験は、周囲温度25℃、放電電流1.0It(A)
から15It(A)、放電終止電圧4.8Vに設定して
実施した。極板群表面の極板群の幅方向に対して中央に
温度センサーを配置して温度を測定した。
(Investigation of Battery Temperature During Discharge) The activated battery was discharged at various rates, and the battery temperature at that time was measured. The discharge test was performed at an ambient temperature of 25 ° C. and a discharge current of 1.0 It (A).
To 15 It (A), and the discharge end voltage was set to 4.8 V. The temperature was measured by disposing a temperature sensor at the center of the electrode group surface in the width direction of the electrode group.

【0036】測定結果を図5に示す。図5では、電池温
度を上昇温度で表記した。図に示した如く、実施例電池
の場合、15It(A)という極めて高いレートで放電
した場合でも電池上昇温度は、低く抑えられている。本
実施例のように、捲回端面の形状が円形の場合、極板群
同志の間隔が0mmの実施例2の場合でも温度上昇は2
3℃に抑えられている。極板群同志の間に間隔を設けた
実施例1、実施例3および実施例4の温度上昇は実施例
2よりもさらに低い。他方比較例2の場合、同一の放電
条件における温度上昇は35℃と高い値を示した。これ
は積層式極板の場合、放熱機能が低く、極板群に熱が籠
もり易い結果である。
FIG. 5 shows the measurement results. In FIG. 5, the battery temperature is represented by a rising temperature. As shown in the figure, in the case of the battery of the present embodiment, the battery rise temperature is kept low even when the battery is discharged at an extremely high rate of 15 It (A). As in the present embodiment, when the shape of the wound end face is circular, even in the case of Embodiment 2 in which the interval between the electrode groups is 0 mm, the temperature rise is 2
It is kept at 3 ° C. The temperature rise in Examples 1, 3 and 4 in which an interval is provided between the electrode groups is even lower than in Example 2. On the other hand, in the case of Comparative Example 2, the temperature rise under the same discharge condition showed a high value of 35 ° C. This is a result of the laminated electrode plate having a low heat dissipation function and being easily trapped in the electrode group.

【0037】また、前記実施例に係る捲回式極板群を備
えた電池の場合、極板群が4個に分割されていること、
極板群と極板群の間に隙間が確保されていることで放熱
機能が高まったため放電によって発生するジュール熱が
籠もらずに放散するために温度上昇が小さく抑えられた
ものであろう。
In the case of the battery provided with the wound electrode group according to the above embodiment, the electrode group is divided into four.
Since the gap between the electrode groups is secured, the heat radiation function is enhanced, and the Joule heat generated by the discharge is dissipated without a cage, so that the temperature rise may be suppressed to a small level.

【0038】今回の実験例において差は大きくはない
が、比較例1の温度上昇値は、実施例1の温度上昇値よ
り高い。実施例1の場合は、極板群の外周面に当接させ
た電解液を含浸したシートによる冷却効果が現れた結果
であろう。
Although the difference is not large in the present experimental example, the temperature rise value of Comparative Example 1 is higher than the temperature rise value of Example 1. In the case of the first embodiment, it may be the result that the cooling effect by the sheet impregnated with the electrolytic solution brought into contact with the outer peripheral surface of the electrode plate group appears.

【0039】詳細なデータを省くが、前記捲回式極板群
の直径もしくは短径が大きくなると放熱機能が低下し熱
が籠もり易くなる。極板群の直径もしくは短径が35m
m以下であれば、放電時の温度上昇は、前記実施例と同
等であるのに対して、35mmを超えると温度上昇が顕
著になる。また、捲回式極板群の場合、巻芯の直径が3
〜5mmであるため、極板群の直径もしくは短径が12
mm未満では、極板群に占める巻芯の容積比率が大きく
なり、容積効率が低下する欠点がある。以上の理由によ
り、本発明に係る捲回式極板群の直径もしくは短径は、
12〜35mmの範囲に納めることが望ましい。
Although detailed data is omitted, when the diameter or the short diameter of the wound electrode group is increased, the heat radiation function is reduced and heat is easily stored. The diameter or minor diameter of the electrode group is 35m
If m or less, the temperature rise at the time of discharge is equivalent to that of the above-described embodiment, whereas if it exceeds 35 mm, the temperature rise becomes remarkable. In the case of a wound electrode group, the diameter of the core is 3 mm.
Since the diameter or the short diameter of the electrode plate group is 12
If it is less than mm, the volume ratio of the core in the electrode plate group becomes large, and there is a disadvantage that the volume efficiency is reduced. For the above reasons, the diameter or the short diameter of the wound electrode group according to the present invention is:
It is desirable to set it within the range of 12 to 35 mm.

【0040】また、放電時に極板群内で発生した熱の一
部は、集電端子を伝わって放熱される。従って、捲回式
極板の幅が大きくなると前記伝導による放熱機能が低下
する。本発明に係る極板群の構成においては、極板群の
幅が50mm以下であれば放電時の温度上昇が前記実施
例と同程度に納まる。しかし、幅が50mmを超えると
温度上昇が顕著になる。また、本発明に係る電池の場
合、極板群の両側に板状集電端子を備え、かつその外側
には電槽の側壁が位置する。集電端子の厚さは0.5〜
2mmを必要とする。極板群の幅が25mmを下回る
と、発電体に占める集電端子の容積比率が大きくなって
容積効率が低下する。以上の理由により、本発明に係る
捲回式極板群の幅は、25〜50mmの範囲に納めるこ
とが望ましい。
Further, part of the heat generated in the electrode group during the discharge is dissipated through the current collecting terminal. Therefore, when the width of the wound electrode plate is increased, the heat dissipation function due to the conduction is reduced. In the configuration of the electrode group according to the present invention, if the width of the electrode group is 50 mm or less, the temperature rise during discharge is substantially the same as in the above-described embodiment. However, when the width exceeds 50 mm, the temperature rise becomes remarkable. Further, in the case of the battery according to the present invention, plate-shaped current collecting terminals are provided on both sides of the electrode plate group, and the side wall of the battery case is located outside the terminal. The thickness of the collecting terminal is 0.5 ~
Requires 2 mm. When the width of the electrode group is less than 25 mm, the volume ratio of the current collecting terminals in the power generator increases, and the volume efficiency decreases. For the above reasons, it is desirable that the width of the wound electrode plate group according to the present invention be within the range of 25 to 50 mm.

【0041】(充放電サイクル試験)前記電池を温度2
5℃において充放電サイクル試験に供した。電流1It
(A)で1時間充電後、同電流にて終止電圧1.0Vの
条件で繰り返し充放電を行った。
(Charge / discharge cycle test)
It was subjected to a charge / discharge cycle test at 5 ° C. Current 1It
After charging for 1 hour in (A), charge and discharge were repeatedly performed at the same current under the condition of a final voltage of 1.0 V.

【0042】実施例1、実施例2および実施例3の電池
は、500サイクル経過後においても78〜80%の容
量を維持していた。実施例電池4の場合は、500サイ
クル経過後容量が65%にまで低下していた。一方比較
例1では500サイクルに達する以前に容量が尽きてし
まった。比較例2は500サイクル経過後において82
%の容量を維持していた。
The batteries of Examples 1, 2 and 3 maintained a capacity of 78 to 80% even after 500 cycles. In the case of Example Battery 4, the capacity was reduced to 65% after 500 cycles. On the other hand, in Comparative Example 1, the capacity was exhausted before reaching 500 cycles. Comparative Example 2 showed 82 after 500 cycles.
% Capacity was maintained.

【0043】比較例1の場合には、試験終了後の電池に
電解液の液涸れ現象が認められた。液涸れによってイン
ピーダンスが上昇し容量低下を来したものと考えられ
る。実施例4のサイクル性能が実施例1〜3や比較例2
に比べて少し劣っている。実施例4の電池には、他の実
施例電池に比べ、インピーダンスの増大が観測された。
実施例4の場合、極板群の表面に電解液を充填した不織
布を配しているが、極板群同志の間隔を大きくしたため
に水分の蒸発が起きた可能性がある。
In the case of Comparative Example 1, the battery after the test showed a phenomenon of electrolyte drying. It is considered that the impedance increased due to the drying up and the capacity decreased. The cycle performance of Example 4 was changed from Examples 1 to 3 and Comparative Example 2.
Is slightly inferior to. In the battery of Example 4, an increase in impedance was observed as compared with the batteries of the other examples.
In the case of the fourth embodiment, a nonwoven fabric filled with an electrolyte is disposed on the surface of the electrode plate group. However, since the interval between the electrode plate groups is increased, there is a possibility that the evaporation of water may occur.

【0044】前記のように、本発明に係る電池の極板群
の構成においては、極板群の外周表面の少なくとも一部
に電解液を含芯させたシートを当接させる。このこと
は、極板群の液涸れを防ぐ方策として極めて有効であ
る。
As described above, in the configuration of the electrode group of the battery according to the present invention, a sheet containing an electrolyte is brought into contact with at least a part of the outer peripheral surface of the electrode group. This is extremely effective as a measure for preventing the electrode group from drying out.

【0045】また、前記のように極板群同志の間隔が8
mmと大きくした場合には、サイクル性能が低下する。
さらに、活物質の充填容積が減るので容積効率の低下を
招く。このような理由によって、極板群間の間隔は8m
m未満、さらには5mm以下とすることが望ましい。
As described above, the interval between the electrode groups is 8
When it is increased to mm, the cycle performance is reduced.
Further, since the filling volume of the active material is reduced, the volume efficiency is reduced. For this reason, the interval between the electrode groups is 8 m.
It is desirable that the thickness be less than m, and more preferably 5 mm or less.

【0046】捲回端面が楕円形または扁平形状の場合、
前記のように複数個の極板群を捲回端面の長軸が平行に
なるように配置する。その際、極板群と極板群の間に1
mm以上8mm未満の間隔、さらには1〜5mmの間隔
をおくのが望ましい。間隔が全くないと極板群に熱が籠
もる虞がある。極板群に熱が籠もること、サイクル寿命
等電池性能に対して悪影響を及ぼす虞がある。極板群の
間隔が8mm以上では前記同様充放電サイクル特性に悪
影響が生じ、容積効率が低下する欠点がある。
When the wound end face is elliptical or flat,
As described above, the plurality of electrode plates are arranged such that the long axes of the wound end surfaces are parallel. At this time, one between the electrode groups
It is desirable to provide an interval of not less than 8 mm and less than 8 mm, and more preferably, an interval of 1 to 5 mm. If there is no interval, heat may be trapped in the electrode plate group. There is a possibility that heat may be trapped in the electrode plate group and the battery performance such as cycle life may be adversely affected. When the distance between the electrode groups is 8 mm or more, the charge / discharge cycle characteristics are adversely affected as described above, and there is a disadvantage that the volume efficiency is reduced.

【0047】[0047]

【発明の効果】以上詳述した如く、本発明の請求項1に
よれば高率放電を行っても温度上昇が小さく、かつ充放
電サイクル性能の優れた電池を提供することができる。
本発明の請求項2および請求項3によれば請求項1の効
果をさらに高めることができる。
As described in detail above, according to the first aspect of the present invention, it is possible to provide a battery having a small temperature rise even when high-rate discharge is performed and having excellent charge-discharge cycle performance.
According to claims 2 and 3 of the present invention, the effect of claim 1 can be further enhanced.

【0048】[0048]

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係る捲回式極板群の斜視図である。FIG. 1 is a perspective view of a wound electrode group according to the present invention.

【図2】本発明に係る複数個の円形捲回式極板群を備え
た発電体を示す図である。
FIG. 2 is a view showing a power generator provided with a plurality of circularly wound electrode plates according to the present invention.

【図3】本発明に係る複数個の楕円または扁平型捲回式
極板群を備えた発電体を示す図である。
FIG. 3 is a view showing a power generator including a plurality of elliptical or flat wound electrode plates according to the present invention.

【図4】電解液を含芯したシートで極板群を包んだ発電
体を示す図である。
FIG. 4 is a view showing a power generator in which an electrode group is wrapped in a sheet containing an electrolyte;

【図5】本発明に係る複数のセルを備えたモノブロック
型の電池の構造を示す図である。
FIG. 5 is a diagram showing a structure of a monoblock battery having a plurality of cells according to the present invention.

【図6】従来の積層式極板群を示す図である。FIG. 6 is a view showing a conventional laminated electrode group.

【図7】放電した時の電池の温度上昇を示すグラフであ
る。
FIG. 7 is a graph showing the temperature rise of a battery when discharged.

【図8】本発明電池と比較電池の充放電サイクル性能を
示すグラフである。
FIG. 8 is a graph showing the charge / discharge cycle performance of the battery of the present invention and a comparative battery.

【符号の説明】[Explanation of symbols]

1 負極集電端子 2 正極集電端子 5 電解液を含浸したシート 10 捲回式極群 DESCRIPTION OF SYMBOLS 1 Negative electrode current collecting terminal 2 Positive electrode current collecting terminal 5 Sheet impregnated with electrolyte 10 Rolled electrode group

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 5H028 AA06 AA08 BB05 CC08 HH05 HH06  ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H028 AA06 AA08 BB05 CC08 HH05 HH06

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】帯状の正極板、セパレータおよび負極板か
ら成る複数個の捲回式極板群を備え、該複数個の捲回式
極板群を1対の正極集電端子と負極集電端子の間に狭持
させた電池であって、前記正極板および負極板の片方の
側辺に極板の芯体を露出させ、該露出させた正極板の芯
体と負極板の芯体とを、極板群の相対向する捲回端面に
突出させ、該突出させた芯体と前記正極集電端子および
負極集電端子とをその係合部において接合して成り、前
記複数個の捲回式極板群の各々の外周表面に電解液を保
持したシートを当接したことを特徴とする電池。
1. A plurality of wound electrode groups each comprising a strip-shaped positive electrode plate, a separator and a negative electrode plate, wherein the plurality of wound electrode groups are formed by a pair of a positive electrode current collector terminal and a negative electrode current collector. A battery sandwiched between terminals, wherein a core of an electrode plate is exposed on one side of the positive electrode plate and the negative electrode plate, and the exposed core of the positive electrode plate and the core of the negative electrode plate are exposed. Projecting from opposed winding end faces of the electrode plate group, and joining the projected core and the positive electrode current collecting terminal and the negative electrode current collecting terminal at their engaging portions, A battery in which a sheet holding an electrolyte is brought into contact with the outer peripheral surface of each of the rotating electrode plates.
【請求項2】前記複数個の極板群と極板群の間に8mm
未満の間隔を設けたことを特徴とする請求項1記載の電
池。
2. The method according to claim 1, wherein the distance between the plurality of electrode groups is 8 mm.
The battery according to claim 1, wherein an interval of less than is provided.
【請求項3】前記捲回式極群の直径もしくは短径が12
〜35mmφ、幅が25〜50mmであることを特徴と
する請求項1記載の電池。
3. The wound electrode group having a diameter or a short diameter of 12
The battery according to claim 1, wherein the battery has a diameter of 25 to 50 mm.
JP2001126539A 2001-04-24 2001-04-24 Cell having a plurality of wound pole plates Pending JP2002324568A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001126539A JP2002324568A (en) 2001-04-24 2001-04-24 Cell having a plurality of wound pole plates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001126539A JP2002324568A (en) 2001-04-24 2001-04-24 Cell having a plurality of wound pole plates

Publications (1)

Publication Number Publication Date
JP2002324568A true JP2002324568A (en) 2002-11-08

Family

ID=18975557

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001126539A Pending JP2002324568A (en) 2001-04-24 2001-04-24 Cell having a plurality of wound pole plates

Country Status (1)

Country Link
JP (1) JP2002324568A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009537945A (en) * 2006-05-15 2009-10-29 エルジー・ケム・リミテッド Double-winding electrode assembly
JP2011077026A (en) * 2009-09-30 2011-04-14 Samsung Sdi Co Ltd Secondary battery
JP2011113965A (en) * 2009-11-23 2011-06-09 Research In Motion Ltd Rechargeable battery with reduced magnetic leak
US9240610B2 (en) 2009-11-23 2016-01-19 Blackberry Limited Rechargeable battery with reduced magnetic leak
WO2017204137A1 (en) * 2016-05-23 2017-11-30 株式会社Gsユアサ Electricity storage element, electricity storage device provided with electricity storage element, moving body provided with electricity storage element, and electricity storage system provided with electricity storage element

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009537945A (en) * 2006-05-15 2009-10-29 エルジー・ケム・リミテッド Double-winding electrode assembly
JP2011077026A (en) * 2009-09-30 2011-04-14 Samsung Sdi Co Ltd Secondary battery
KR101165503B1 (en) * 2009-09-30 2012-07-13 삼성에스디아이 주식회사 Rechargeable battery
US8450006B2 (en) 2009-09-30 2013-05-28 Samsung Sdi Co., Ltd. Rechargeable battery
JP2011113965A (en) * 2009-11-23 2011-06-09 Research In Motion Ltd Rechargeable battery with reduced magnetic leak
US9240610B2 (en) 2009-11-23 2016-01-19 Blackberry Limited Rechargeable battery with reduced magnetic leak
WO2017204137A1 (en) * 2016-05-23 2017-11-30 株式会社Gsユアサ Electricity storage element, electricity storage device provided with electricity storage element, moving body provided with electricity storage element, and electricity storage system provided with electricity storage element
JPWO2017204137A1 (en) * 2016-05-23 2019-03-22 株式会社Gsユアサ Power storage device, power storage device including power storage element, mobile body including power storage element, and power storage system including power storage element
JP7049603B2 (en) 2016-05-23 2022-04-07 株式会社Gsユアサ A power storage element, a power storage device including a power storage element, a mobile body including a power storage element, and a power storage system including a power storage element.

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