JP4706087B2 - Battery and method for manufacturing the battery - Google Patents

Battery and method for manufacturing the battery Download PDF

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Publication number
JP4706087B2
JP4706087B2 JP30293299A JP30293299A JP4706087B2 JP 4706087 B2 JP4706087 B2 JP 4706087B2 JP 30293299 A JP30293299 A JP 30293299A JP 30293299 A JP30293299 A JP 30293299A JP 4706087 B2 JP4706087 B2 JP 4706087B2
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Prior art keywords
battery case
battery
side surfaces
lithium ion
ion secondary
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JP2001126677A (en
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直澄 宮永
吉田　　浩明
文隆 今村
剛文 井上
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GS Yuasa International Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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

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  • Secondary Cells (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、放熱のために電池ケースを放熱板で挟持した電池の製造方法に関する。
【０００２】
【従来の技術】
電池は、充放電時に高温になると、劣化によって寿命が短くなるおそれがある。ただし、通常の小型電池の場合には、電池ケースから外気に放熱を行う空冷によって、電池内部の温度上昇を十分に防止することができる。しかし、大型のリチウムイオン二次電池等では、発熱量が大きいために、空冷だけでは十分な放熱ができない場合がある。また、このリチウムイオン二次電池を人工衛星等で用いる場合には、周囲が宇宙空間の真空であるため、空冷を行うことができない。
【０００３】
そこで、従来は、例えば図４に示すような長円筒形のリチウムイオン二次電池１を、図５に示すように、２枚のアルミプレート２で挟持して、これらのアルミプレート２を通じて電池の放熱を行うようにする場合がある。このリチウムイオン二次電池１は、図４に示すように、長円筒形の容器状をなすアルミニウム製の電池ケース１ａ内に図示しないエレメントを収納し、上端開口部をアルミニウム製の蓋板１ｂで塞いで溶接により内部を密閉したものである。そして、この電池ケース１ａの対向する平面状の２つの側面をアルミニウム製の２枚のアルミプレート２で挟んで、これらのアルミプレート２同士をボルト３で引き合うように締め付けることにより挟持する。また、これらの２枚のアルミプレート２は、図示しない温度制御装置に繋がるアルミ基盤４に底面を固着する。従って、リチウムイオン二次電池１で発生した熱は、電池ケース１ａの平面状の対向する２つの側面を介して２枚のアルミプレート２に伝わり、さらにアルミ基盤４に熱伝導して温度制御装置で吸熱されることにより放熱が行われるようになる。
【０００４】
【発明が解決しようとする課題】
ところが、上記リチウムイオン二次電池１の電池ケース１ａは、アルミニウム板をインパクト成形して容器状に形成する場合に、容器内に入り込んだ金型を引き抜く際の負圧によって、図６及び図７に示すように、この電池ケース１ａの側面で最も強度の弱い平面状の対向する２つの側面が外気の圧力により凹状に窪み反りが発生するようになる。そして、このような電池ケース１ａを用いたリチウムイオン二次電池１をアルミプレート２で挟持すると、図８に示すように、２枚のアルミプレート２が電池ケース１ａの対向する２つの側面における上下端部にのみ当接するので、それ以上圧迫しても強度の高い電池ケース１ａの底部と蓋板１ｂに制限されて対向する２つの側面に密着することができない。
【０００５】
このため、従来は、アルミプレート２と電池ケース１ａとの接触面積が小さくなるために熱伝導効率が悪くなり、リチウムイオン二次電池１の放熱が不十分になるという問題があった。しかも、このようにアルミプレート２が電池ケース１ａの上下端部のみを圧迫すると、蓋板１ｂを取り付けるための溶接部に応力が集中して、この溶接が外れるおそれがあるという問題も生じていた。
【０００６】
なお、リチウムイオン二次電池１は、エレメントを真空引きしてから電解液を充填するので、電池ケース１ａを密閉した後にこの電解液がエレメントに浸透する段階で電池ケース１ａの内部がわずかに負圧となり、両平面部に凹状の反りが発生する場合もある。従って、上記問題点は、インパクト成形によって電池ケース１ａを成形する場合にのみ発生するとは限らない。また、長円筒形に限らず、強度的に弱い平面を有する角形の電池ケース１ａでも、同様の問題は生じ得る。さらに、リチウムイオン二次電池１に限らず、長円筒形又は角形の電池ケース１ａを用いる電池一般についても同様の問題は生じ得る。
【０００７】
本発明は、かかる事情に対処するためになされたものであり、電池ケースの側面を凸面状にしておくことにより、放熱板等で挟持した際の電池ケースとの接触面積を大きくすることができる電池及びこの電池の製造方法を提供することを目的としている。
【０００８】
【課題を解決するための手段】
本出願の第１の発明は、長円筒形又は角形の電池ケースにエレメントを収納して密閉した電池の製造方法において、前記電池ケースの対向する２つの平面状の側面が前記側面の中心部ほど外側に膨らんだ凸面状に形成されており、凸面状に形成させた前記対向する２つのそれぞれの側面に放熱板を備え、前記放熱板から前記電池ケースへの方向に圧迫を加えることで凸面状に形成された前記側面を平坦化することを特徴とする。
【０００９】
本出願の第１の発明によれば、電池ケースの対向する２つの側面が凸面状に形成されているので、ここに平面を押し当てると、これら側面の凸面状が圧迫によって平坦になり、側面全体が密着するようになる。従って、この電池を２枚の金属板の間に挟持させたり、金属製の凹部に押し込む等することにより、電池ケースの対向する２つの側面の全体をこれらの金属等に密着させれば、電池の放熱を確実に行うことができるようになる。
【００１０】
本出願の第２の発明は、上記第１の発明の電池の製造方法において、対向する２つの平面状の側面が前記側面の中心部ほど外側に膨らんだ凸部状に形成させた前記電池ケースにエレメントを収納することを特徴とする。
【００１５】
【発明の実施の形態】
以下、本発明の実施形態について図面を参照して説明する。
【００１６】
図１〜図３は本発明の一実施形態を示すものであって、図１はアルミプレートで挟持されたリチウムイオン二次電池の正面図、図２は電池ケースの縦断面正面図、図３はアルミプレートで挟持し締め付けたリチウムイオン二次電池の正面図である。なお、図３〜図４に示した従来例と同様の機能を有する構成部材には同じ番号を付記する。また、以下では「対向する２つの側面」を「両側面」とする。
【００１７】
本実施形態は、人工衛星等に搭載して真空の宇宙空間で使用する長円筒形のリチウムイオン二次電池１について説明する。リチウムイオン二次電池１は、従来例と同様の構成である。ただし、このリチウムイオン二次電池１の電池ケース１ａは、インパクト成形によって一旦平面状の両側面が、図７に示したように凹状に窪んだものを、図２に示すように、外側に凸面状に変形させる。この電池ケース１ａの両側面を凸面状に変形させるには、電池ケース１ａの内部に例えば偏平した卵形の治具を挿入し回転させることにより内側から押し広げる方法や、この電池ケース１ａの両側面を外側から例えば真空吸着させて引っ張る方法などを用いることができる。また、内側から押し広げる方法としては、内部に風船状のものを挿入し、これに空気を注入して膨らませることにより圧力を加えることもできる。なお、図２では説明を分かりやすくするために、電池ケース１ａの両側面の変形を強調して示している。また、図１、図７及び図８も同様である。
【００１８】
上記電池ケース１ａの両側面の凸面状は、側面の中心部ほど外側に膨らんだものであればよく、電池ケース１ａの底部や、後に説明する蓋板１ｂの取り付け部を変形させることは困難であるため、アルミプレート２との密着性を高めるには、上下端部に近づくほどなだらかに膨らみが減少するような凸面状となっていることが好ましい。なお、この両側面の凸面状が電池ケース１ａの両湾曲面側に近づく方向については特に限定しないが、長円筒形の両湾曲面を変形させることは困難であるため、この方向にもなだらかに膨らみが減少するように形成することが好ましい。
【００１９】
上記電池ケース１ａは、図４に示した従来例と同様に、内部に図示しないエレメントを収納した後に、上端開口部を蓋板１ｂで塞いで溶接により内部を密閉する。この際、蓋板１ｂには、小さな注入口を開口しておき、ここから電解液を注入する。また、この注入口は、その後溶接等により封口する。
【００２０】
上記のようにして製造されたリチウムイオン二次電池１は、図１に示すように、電池ケース１ａの両側面を２枚のアルミプレート２で挟む。すると、電池ケース１ａの両側面が凸面状であるため、アルミプレート２は、これらの両側面の中央部のみに当接することになる。しかし、２枚のアルミプレート２は、図５に示したように、ボルト３によって互いに引き合うように締め付けられるので、図３に示すように、電池ケース１ａの両側面の全面をアルミプレート２に密着させることができる。しかも、このアルミプレート２の締め付けを、電池ケース１ａの両側面が十分に密着した時点で止めれば、電池ケース１ａの上下端部への圧迫がほとんどなくなり、蓋板１ｂの溶接部に不要な応力を加える心配もなくなる。なお、図１では、ボルト３を省略して示している。また、図３及び図８も同様である。
【００２１】
上記構成によれば、電池ケース１ａの上下端部に不要な圧迫を加えることなく、両側面の全面をアルミプレート２に密着させることができるので、リチウムイオン二次電池１で発した熱をこれらのアルミプレート２に円滑に伝え、真空中においても確実な放熱を行うことができるようになる。
【００２２】
なお、上記実施形態では、電池ケース１ａに長円筒形のものを使用したが、アルミプレート２を密着させるようなほぼ平面状の側面を有すればよいので、角形の電池ケース１ａを使用する場合にも同様に実施可能である。また、上記実施形態では、電池ケース１ａに底のある容器状のものを用いたが、筒状の両端開口部を共に蓋板１ｂで塞ぐようにしたものであってもよい。さらに、上記実施形態では、電池ケース１ａやアルミプレート２にアルミニウム製のものを使用したが、これらの材質も、熱伝導性のよいものであれば特に限定されない。
【００２３】
さらに、上記実施形態では、アルミプレート２のような放熱板を用いる場合について説明したが、電池ケース１ａが凸面状に形成された両側面を有していれば、どのような平面を押し当ててもよく、例えば金属製の放熱ブロックの深い凹部に、このリチウムイオン二次電池１を押し込むようにしてもよく、また、電池ケース１ａの側面を下にしてリチウムイオン二次電池１を金属製等の床面に置き、この上に底面が平面の金属ブロックを載置するだけでもよい。従来のように電池ケース１ａの両側面が凹面状に窪んでいると、これの全面を密着させるには、凸面を持った放熱板等を用意する必要があり、放熱のために特別に加工した専用の放熱板等が必要になるが、本発明によれば、既存の任意の平面に押し当てるだけで、容易に確実な放熱を行わせることができるようになる。
【００２４】
さらに、上記実施形態では、リチウムイオン二次電池１について説明したが、他の電池であっても、放熱板等による積極的な放熱を行う場合もあるので、必ずしも電池の種類は問わない。
【００２５】
【発明の効果】
以上の説明から明らかなように、本発明の電池の製造方法によれば、放熱板等が電池ケースの両側面に密着するので、これらの接触面積を広くして十分な放熱を行うことができるようになる。
【図面の簡単な説明】
【図１】アルミプレートで挟持されたリチウムイオン二次電池の正面図である。
【図２】対向する２つの平面状の側面が前記側面の中心部ほど外側に膨らんだ凸面状に形成された電池ケースの縦断面正面図である。
【図３】本発明の第一実施形態を示すものであって、アルミプレートで挟持し締め付けたリチウムイオン二次電池の正面図である。
【図４】リチウムイオン二次電池の斜視図である。
【図５】アルミプレートで挟持されたリチウムイオン二次電池の斜視図である。
【図６】従来例を示すものであって、電池ケースの斜視図である。
【図７】従来例を示すものであって、電池ケースの縦断面正面図である。
【図８】従来例を示すものであって、アルミプレートで挟持されたリチウムイオン二次電池の正面図である。
【符号の説明】
１ リチウムイオン二次電池
１ａ 電池ケース
２ アルミプレート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a battery in which a battery case is held between heat sinks for heat dissipation.
[0002]
[Prior art]
When a battery becomes high temperature during charging / discharging, there is a risk that its life will be shortened due to deterioration. However, in the case of a normal small battery, temperature rise inside the battery can be sufficiently prevented by air cooling that radiates heat from the battery case to the outside air. However, since a large-sized lithium ion secondary battery or the like generates a large amount of heat, it may not be able to sufficiently dissipate heat by air cooling alone. In addition, when this lithium ion secondary battery is used in an artificial satellite or the like, air cooling cannot be performed because the surrounding area is a vacuum in outer space.
[0003]
Therefore, conventionally, for example, a long cylindrical lithium ion secondary battery 1 as shown in FIG. 4 is sandwiched between two aluminum plates 2 as shown in FIG. There is a case where heat is dissipated. As shown in FIG. 4, in the lithium ion secondary battery 1, an element (not shown) is accommodated in an aluminum battery case 1a having a long cylindrical container shape, and an upper end opening is covered with an aluminum lid plate 1b. Closed and sealed inside by welding. Then, the two opposite planar side surfaces of the battery case 1 a are sandwiched between two aluminum plates 2 made of aluminum, and the aluminum plates 2 are clamped by being tightened so as to be attracted with bolts 3. Further, these two aluminum plates 2 have their bottom surfaces fixed to an aluminum substrate 4 connected to a temperature control device (not shown). Therefore, the heat generated in the lithium ion secondary battery 1 is transmitted to the two aluminum plates 2 through the two planar opposing side surfaces of the battery case 1a, and is further conducted to the aluminum substrate 4 to be temperature controlled. The heat is dissipated by absorbing the heat.
[0004]
[Problems to be solved by the invention]
However, when the battery case 1a of the lithium ion secondary battery 1 is formed into a container shape by impact molding of an aluminum plate, the negative pressure at the time of pulling out the mold that has entered the container is shown in FIGS. As shown in FIG. 2, the two opposite flat side surfaces having the weakest strength on the side surface of the battery case 1a are concavely warped due to the pressure of the outside air. When a lithium ion secondary battery 1 using such a battery case 1a is sandwiched between aluminum plates 2, as shown in FIG. 8, the two aluminum plates 2 are vertically moved on two opposite side surfaces of the battery case 1a. Since it abuts only on the end portion, even if it is further pressed, it is not possible to make close contact with the two side surfaces facing each other limited to the bottom of the battery case 1a and the lid plate 1b.
[0005]
For this reason, conventionally, since the contact area between the aluminum plate 2 and the battery case 1a is small, there is a problem that the heat conduction efficiency is deteriorated and the heat radiation of the lithium ion secondary battery 1 is insufficient. In addition, when the aluminum plate 2 presses only the upper and lower ends of the battery case 1a in this way, there is a problem that stress is concentrated on the welded portion for attaching the cover plate 1b, and this welding may be disconnected. .
[0006]
In addition, since the lithium ion secondary battery 1 is evacuated from the element and filled with the electrolytic solution, the inside of the battery case 1a is slightly negative when the electrolytic solution penetrates into the element after the battery case 1a is sealed. In some cases, concave warpage occurs in both plane portions. Therefore, the above problem does not always occur only when the battery case 1a is molded by impact molding. Further, the same problem may occur not only in the long cylindrical shape but also in the rectangular battery case 1a having a plane that is weak in strength. Furthermore, not only the lithium ion secondary battery 1 but also a general battery using a long cylindrical or rectangular battery case 1a may cause the same problem.
[0007]
The present invention has been made to cope with such a situation, and by making the side surface of the battery case convex, it is possible to increase the contact area with the battery case when sandwiched by a heat sink or the like. An object is to provide a battery and a method of manufacturing the battery.
[0008]
[Means for Solving the Problems]
According to a first aspect of the present application, in a battery manufacturing method in which an element is housed and sealed in a long cylindrical or rectangular battery case, the two planar side surfaces of the battery case facing each other are closer to the center of the side surface. It is formed in a convex shape that bulges outward, and is provided with a heat sink on each of the two opposing side surfaces formed in a convex shape, and is convex by applying pressure in the direction from the heat sink to the battery case. The side surface formed in the step is flattened .
[0009]
According to the first invention of the present application, since the two opposite side surfaces of the battery case are formed in a convex shape, when the flat surface is pressed here, the convex shape of these side surfaces becomes flat by compression, and the side surface The whole comes into close contact. Therefore, if the battery is sandwiched between two metal plates or pressed into a metal recess to bring the two opposite side surfaces of the battery case into close contact with these metals, the heat dissipation of the battery Can be performed reliably.
[0010]
According to a second invention of the present application, in the battery manufacturing method according to the first invention, the two battery-like flat side surfaces are formed in a convex shape that bulges outward toward the center of the side surface. The element is housed in.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0016]
1 to 3 show an embodiment of the present invention. FIG. 1 is a front view of a lithium ion secondary battery sandwiched between aluminum plates, FIG. 2 is a longitudinal sectional front view of a battery case, and FIG. FIG. 3 is a front view of a lithium ion secondary battery that is clamped and clamped by an aluminum plate. In addition, the same number is attached | subjected to the structural member which has a function similar to the prior art example shown in FIGS. In the following, “two opposing side surfaces” are referred to as “both side surfaces”.
[0017]
In the present embodiment, a long cylindrical lithium ion secondary battery 1 mounted on an artificial satellite or the like and used in a vacuum space will be described. The lithium ion secondary battery 1 has the same configuration as the conventional example. However, the battery case 1a of the lithium ion secondary battery 1 has a flat side surface that has been recessed once as shown in FIG. To deform. In order to deform the both side surfaces of the battery case 1a into a convex shape, for example, a flat egg-shaped jig is inserted into the battery case 1a and rotated to spread from the inside, or both sides of the battery case 1a are For example, a method of pulling the surface by vacuum suction from the outside can be used. Further, as a method of expanding from the inside, a pressure can be applied by inserting a balloon-like object inside and inflating it by injecting air. In FIG. 2, the deformation of both side surfaces of the battery case 1 a is emphasized for easy understanding. The same applies to FIG. 1, FIG. 7 and FIG.
[0018]
The convex shape of the both side surfaces of the battery case 1a only needs to bulge outward toward the center of the side surface, and it is difficult to deform the bottom part of the battery case 1a or the attachment part of the cover plate 1b described later. Therefore, in order to improve the adhesion with the aluminum plate 2, it is preferable that the convex shape is such that the bulge gradually decreases as it approaches the upper and lower ends. Note that the direction in which the convex surfaces of both side surfaces approach the both curved surfaces of the battery case 1a is not particularly limited, but it is difficult to deform the long cylindrical curved surfaces, so that the direction is also gentle in this direction. It is preferable to form so as to reduce the swelling.
[0019]
As in the conventional example shown in FIG. 4, the battery case 1a contains an element (not shown) inside, and then closes the upper end opening with a lid plate 1b and seals the inside by welding. At this time, a small inlet is opened in the lid plate 1b, and the electrolytic solution is injected therefrom. Further, the inlet is then sealed by welding or the like.
[0020]
As shown in FIG. 1, the lithium ion secondary battery 1 manufactured as described above sandwiches both side surfaces of the battery case 1 a between two aluminum plates 2. Then, since both the side surfaces of the battery case 1a are convex, the aluminum plate 2 comes into contact with only the center part of these both side surfaces. However, as shown in FIG. 5, the two aluminum plates 2 are tightened so as to be attracted to each other by the bolt 3, so that the entire surfaces of both side surfaces of the battery case 1a are in close contact with the aluminum plate 2 as shown in FIG. Can be made. Moreover, if the tightening of the aluminum plate 2 is stopped when both side surfaces of the battery case 1a are sufficiently adhered, the pressure on the upper and lower ends of the battery case 1a is almost eliminated, and unnecessary stress is applied to the welded portion of the cover plate 1b. No need to worry about adding. In FIG. 1, the bolt 3 is omitted. The same applies to FIGS. 3 and 8.
[0021]
According to the above configuration, the entire surface of both sides can be brought into close contact with the aluminum plate 2 without applying unnecessary pressure to the upper and lower ends of the battery case 1a, so that the heat generated by the lithium ion secondary battery 1 can be The aluminum plate 2 can be smoothly transmitted to and reliably radiated even in a vacuum.
[0022]
In the above embodiment, a long cylindrical shape is used for the battery case 1a. However, since the battery case 1a only needs to have a substantially flat side face that allows the aluminum plate 2 to be in close contact, the rectangular battery case 1a is used. Similarly, it can be implemented. Moreover, in the said embodiment, although the container-shaped thing with a bottom was used for the battery case 1a, you may close | seal | close both cylindrical opening parts with the cover board 1b. Furthermore, in the said embodiment, although the thing made from aluminum was used for the battery case 1a and the aluminum plate 2, these materials will also not be specifically limited if heat conductivity is good.
[0023]
Furthermore, although the said embodiment demonstrated the case where a heat sink like the aluminum plate 2 was used, if the battery case 1a has the both sides | surfaces formed in convex shape, what plane will be pressed against? For example, the lithium ion secondary battery 1 may be pushed into a deep recess of a metal heat dissipation block, or the lithium ion secondary battery 1 may be made of metal with the side surface of the battery case 1a facing down. It is also possible to place a metal block having a flat bottom surface on the floor. If both side surfaces of the battery case 1a are recessed in a conventional manner as in the prior art, it is necessary to prepare a heat sink with a convex surface in order to bring the entire surface into close contact, and specially processed for heat dissipation A dedicated heat radiating plate or the like is required, but according to the present invention, reliable heat radiation can be easily performed simply by pressing against an existing arbitrary plane.
[0024]
Furthermore, in the said embodiment, although the lithium ion secondary battery 1 was demonstrated, even if it is another battery, since positive heat dissipation with a heat sink etc. may be performed, the kind of battery is not necessarily ask | required.
[0025]
【The invention's effect】
As is clear from the above description, according to the battery manufacturing method of the present invention, since the heat radiating plate and the like are in close contact with both side surfaces of the battery case, these contact areas can be widened to perform sufficient heat dissipation. It becomes like this.
[Brief description of the drawings]
FIG. 1 is a front view of a lithium ion secondary battery sandwiched between aluminum plates .
FIG. 2 is a longitudinal sectional front view of a battery case in which two opposing planar side surfaces are formed in a convex shape that bulges outward toward the center of the side surface .
FIG. 3 shows a first embodiment of the present invention, and is a front view of a lithium ion secondary battery clamped by being clamped by an aluminum plate.
FIG. 4 is a perspective view of a lithium ion secondary battery.
FIG. 5 is a perspective view of a lithium ion secondary battery sandwiched between aluminum plates.
FIG. 6 shows a conventional example and is a perspective view of a battery case.
FIG. 7 shows a conventional example and is a longitudinal sectional front view of a battery case.
FIG. 8 shows a conventional example and is a front view of a lithium ion secondary battery sandwiched between aluminum plates.
[Explanation of symbols]
1 Lithium ion secondary battery 1a Battery case 2 Aluminum plate

Claims (2)

長円筒形又は角形の電池ケースにエレメントを収納して密閉した電池の製造方法において、
前記電池ケースの対向する２つの平面状の側面が前記側面の中心部ほど外側に膨らんだ凸面状に形成されており、凸面状に形成させた前記対向する２つのそれぞれの側面に放熱板を備え、前記放熱板から前記電池ケースへの方向に圧迫を加えることで凸面状に形成された前記側面を平坦化することを特徴とする電池の製造方法。In a battery manufacturing method in which an element is housed and sealed in a long cylindrical or rectangular battery case,
Two planar side surfaces of the battery case facing each other are formed in a convex shape that bulges outward toward the center of the side surface, and a heat sink is provided on each of the two opposing side surfaces formed in a convex shape. A method for producing a battery, characterized in that the side surface formed in a convex shape is flattened by applying pressure in a direction from the heat radiating plate to the battery case . 対向する２つの平面状の側面が前記側面の中心部ほど外側に膨らんだ凸部状に形成させた前記電池ケースにエレメントを収納することを特徴とする請求項１に記載の電池の製造方法。2. The battery manufacturing method according to claim 1, wherein the element is housed in the battery case in which two opposing planar side surfaces are formed in a convex shape that bulges outward toward the center of the side surface.
JP30293299A 1999-10-25 1999-10-25 Battery and method for manufacturing the battery Expired - Fee Related JP4706087B2 (en)

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