JPH02281552A - Sealed battery - Google Patents
Sealed batteryInfo
- Publication number
- JPH02281552A JPH02281552A JP1103893A JP10389389A JPH02281552A JP H02281552 A JPH02281552 A JP H02281552A JP 1103893 A JP1103893 A JP 1103893A JP 10389389 A JP10389389 A JP 10389389A JP H02281552 A JPH02281552 A JP H02281552A
- Authority
- JP
- Japan
- Prior art keywords
- case
- thin
- battery
- forming
- raised portion
- 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
Links
- 239000000463 material Substances 0.000 abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 5
- 239000010935 stainless steel Substances 0.000 abstract description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052744 lithium Inorganic materials 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000004745 nonwoven fabric Substances 0.000 abstract description 2
- 239000013543 active substance Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- SOZVEOGRIFZGRO-UHFFFAOYSA-N [Li].ClS(Cl)=O Chemical compound [Li].ClS(Cl)=O SOZVEOGRIFZGRO-UHFFFAOYSA-N 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 2
- KPZGRMZPZLOPBS-UHFFFAOYSA-N 1,3-dichloro-2,2-bis(chloromethyl)propane Chemical compound ClCC(CCl)(CCl)CCl KPZGRMZPZLOPBS-UHFFFAOYSA-N 0.000 description 1
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、防爆安全装置を備えた密閉形電池に関し、特
に、オキシハロゲン化物系液体活物質を用い、ハーメチ
ックシールを採用した密閉形電池に関するものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a sealed battery equipped with an explosion-proof safety device, and in particular to a sealed battery using an oxyhalide-based liquid active material and employing a hermetic seal. be.
従来の技術
塩化チオニル−リチウム電池で代表されるような正極活
物質としてオキシハロゲン化物を用い、負極活物質とし
てアルカリ金属を用いる電池では。Batteries that use oxyhalides as positive electrode active materials and alkali metals as negative electrode active materials, such as conventional thionyl chloride-lithium batteries.
活物質が水分と非常に反応しやすいため、電池ケースを
ハーメチックシールにより封口する完全密閉構造が採用
されている。Because the active material is highly reactive with moisture, a completely sealed structure is used to seal the battery case with a hermetic seal.
このようなハーメチックシールを採用した電池では、密
閉性が高い反面、高温加熱下に置かれたり、高電圧で充
電されるなどの事態に遭遇すると。Batteries that use such a hermetic seal have a high degree of airtightness, but if they encounter situations such as being placed under high temperature heating or being charged at high voltage.
電池の内部圧力が異常に上昇して破裂に至り、電池使用
機器を破損するおそれがある。そこで１種々の防爆安全
装置が提案されてきたが、特に電池ケースの底部に溝を
加工し薄肉部を形成したものが多かった。There is a risk that the internal pressure of the battery will rise abnormally, leading to it bursting and damaging equipment that uses the battery. Therefore, various explosion-proof safety devices have been proposed, but in particular, many of them have a groove formed in the bottom of the battery case to form a thin wall portion.
従来、この種の密閉形電池は、第６図に示すような構成
であった。第６図に於いて、塩化チオニル−リチウム電
池の発電要素、例えばリチウム負極１１、セパレータ１
２．炭素多孔質成形体正極１３などを収納した電池容器
１の開口部にガラス層１６を介して正極端子１７を設け
た電池蓋１６を溶接してあり、正極端子１７はパイプ状
をしていて、その上端部を電解液１８を注入した後正極
集電体１４の上部と溶接して封止してあった。電池容器
１の底部２には平面形状が十字状の溝３が形成されてい
た。第６図は、第６図に示す従来の構成による密閉形電
池に用いた電池容器の底部の。Conventionally, this type of sealed battery has had a configuration as shown in FIG. In FIG. 6, power generation elements of a thionyl chloride-lithium battery, such as a lithium negative electrode 11 and a separator 1, are shown.
2. A battery lid 16 with a positive electrode terminal 17 provided thereon is welded to the opening of the battery container 1 containing a carbon porous molded positive electrode 13 through a glass layer 16, and the positive electrode terminal 17 has a pipe shape. After the electrolytic solution 18 was injected into the upper end thereof, the upper end was welded to the upper part of the positive electrode current collector 14 and sealed. A groove 3 having a cross-shaped planar shape was formed in the bottom 2 of the battery container 1. FIG. 6 shows the bottom of a battery container used in the conventional sealed battery shown in FIG.
プレス成形による薄肉加工の状態を示す要部拡大断面図
である。第６図において、金型Ｄ（溝加工用ポンチ）と
金型罵（受台）とによるプレス成形によって、電池容器
１の底部２の外面に、底部に平坦部３１Ｌを有する断面
倒立台形状の溝３を形成していた（特開昭６３−８６２
４３号公報）。FIG. 3 is an enlarged cross-sectional view of a main part showing a state of thin-wall processing by press forming. In FIG. 6, by press forming using a mold D (grooving punch) and a mold holder (receiving stand), a truncated trapezoidal cross-sectional shape having a flat portion 31L at the bottom is formed on the outer surface of the bottom 2 of the battery container 1. Groove 3 was formed (Japanese Patent Application Laid-Open No. 63-862
Publication No. 43).
発明が解決しようとする課題
このような従来の構成では、溝底部に平坦部を設けたこ
とによる切欠効果と、平面形状において複数の溝が交点
を持つことにより電池の内部圧力が該交点に集中してか
かるようになり、薄肉部の厚さをある程度維持しても、
比較的低い圧力で。Problems to be Solved by the Invention In such a conventional configuration, the internal pressure of the battery is concentrated at the intersection point due to the notch effect due to the flat portion provided at the bottom of the groove and the intersection point between the plurality of grooves in the planar shape. Even if the thickness of the thin part is maintained to some extent,
at relatively low pressure.
溝底部の端部から切裂破壊が生じるようになっている。Cutting failure occurs from the end of the groove bottom.
しかし、プレス成形により溝加工をして量産対応を行な
う場合、どうしても溝形成用のポンチの損傷が避けられ
ず、溝底部の端部における薄肉部の厚さがポンチの損傷
に伴い厚くなり、前記切欠効果が期待できなくなるおそ
れがあった。即ち、第６図において、溝底部３ａの端部
３１Ｌ２において、電池の内部圧力上昇時の曲げによる
引張力に対する抵抗が大きくなり、切裂破壊が生じる箇
所が溝底部３１Ｌの端部３１Ｌ２から中央部３！Ｌ。However, when processing grooves by press forming for mass production, damage to the groove forming punch is unavoidable, and the thickness of the thin part at the end of the groove bottom becomes thicker due to the damage to the punch. There was a possibility that the notch effect could not be expected. That is, in FIG. 6, at the end 31L2 of the groove bottom 3a, the resistance to the tensile force due to bending when the internal pressure of the battery increases is large, and the location where cutting failure occurs is from the end 31L2 of the groove bottom 31L to the center. 3! L.
になるものもあり、防爆機能の作動圧力にバラツキを生
じた。特に、電池容器の材質がステンレス鋼である場合
、その加工硬化のためにポンチの破損が著しかった。そ
こで薄肉部４の厚さｔを比較的薄い状態で安定して量産
することがやはり基本となる。そういう観点から、溝底
部に幅広い平坦部があったり、平面形状に見る溝の交点
近傍においては、プレス成形による薄肉加工時にケース
材料が逃げにくいので、薄くつぶそうとするほど加工荷
重が大きくなり、ポンチに負担がかかり、金型寿命が短
くなるという課題があった。This caused variations in the operating pressure of the explosion-proof function. In particular, when the material of the battery container is stainless steel, the punch is severely damaged due to its work hardening. Therefore, it is essential to stably mass-produce the thin portion 4 with a relatively small thickness t. From this point of view, if there is a wide flat part at the bottom of the groove or near the intersection of the grooves when seen in a plan view, it is difficult for the case material to escape during thin wall processing by press forming, so the more you try to crush the case thinner, the greater the processing load will be. The problem was that it put a strain on the punch and shortened the life of the mold.
本発明はこのような課題を解決するもので、電池ケース
の底部のプレス成形による薄肉加工を安定化させること
によシ、安全性及び量産性の高い防爆機能を備えた密閉
形電池を提供することを目的とするものである。The present invention solves these problems and provides a sealed battery with explosion-proof function that is highly safe and mass-producible by stabilizing the thin-walled press molding of the bottom of the battery case. The purpose is to
課題を解決するための手段
この課題を解決するために本発明は、電池ケースの底部
の内面と外面のどちらか一方に凸部、他方に該凸部よシ
も大きな凹部を部分的に形成し、該凸部以外の面と対向
する該凹部の底面に挾まれた薄肉部を設けたものであシ
、好ましくはこの薄肉部を略Ｃ形状に形成し、防爆機能
を持たせたものである。Means for Solving the Problem In order to solve this problem, the present invention partially forms a convex portion on one of the inner and outer surfaces of the bottom of the battery case, and a recess that is larger than the convex portion on the other side. , a thin part is provided between the bottom surface of the recessed part facing the surface other than the convex part, preferably this thin part is formed into a substantially C shape, and has an explosion-proof function. .
作用
この構成によシ、プレス成形による薄肉加工時に、ケー
ス底部に凸部を形成するための金型の凹部がケース材料
の逃げ場所になり、また従来の構成の平面形状に見るよ
うな溝の交点に相当するような部分もないので、比較的
加工荷重が小さくて済む。また、従来の構成で用いた溝
加工用ポンチに比べ、ポンチ自体の加工部の肉厚を確保
する設計ができるので、ポンチの負担が軽減できる。そ
の結果、金型寿命が長くなり、量産対応において安定し
た薄肉加工を実現できる。Effects With this configuration, during thin-wall processing by press molding, the concave part of the mold for forming the convex part on the bottom of the case becomes a place for the case material to escape, and the grooves that are seen in the planar shape of the conventional configuration are Since there is no part that corresponds to an intersection, the machining load can be relatively small. Furthermore, compared to the groove processing punch used in the conventional configuration, the punch itself can be designed to ensure the thickness of the processed portion, so the burden on the punch can be reduced. As a result, the life of the mold is extended, and stable thin-wall processing can be achieved in mass production.
更に、薄肉部を略Ｃ形状に形成することにより、防爆機
能の作動時には、該Ｃ形状内の面積が完全に開放して電
池内部で発生したガスの逸散を充分性なうことができ、
破片の飛散もなく、安全性の高い防爆機能を得ることが
できることとなる。Furthermore, by forming the thin wall portion into a substantially C-shape, when the explosion-proof function is activated, the area within the C-shape is completely opened, allowing sufficient dissipation of the gas generated inside the battery.
There is no scattering of fragments, and a highly safe explosion-proof function can be obtained.
実施例
第１図は本発明の一実施例による密閉形電池の半裁断面
図であり、第１図において、金属リテクム２をステンレ
ス製の電池ケース１の内周面に圧着し、この金属リチウ
ム２の内側には、ガラス繊維不織布からなるセパレータ
３．上紙３ａ、底紙３ｂを介して炭素成形体（正極）４
を収納する。Embodiment FIG. 1 is a half-cut sectional view of a sealed battery according to an embodiment of the present invention. In FIG. Separator 3 made of glass fiber nonwoven fabric is placed inside the separator 3. A carbon molded body (positive electrode) 4 is passed through the top paper 3a and the bottom paper 3b.
to store.
四塩化アルミニウムリチウムを含む塩化チオニル溶液６
の一部を、前記セパレータ３、上紙３ａ底紙３ｂ及び炭
素成形体４が含浸している。ニッケル製集電体６は、下
部大半を炭素成形体４に埋設してあり、上部先端は、ス
テンレス製パイプ７の上部先端と溶接している（溶接部
１１）。他極性端子を兼ねるステンレス製パイプ７は、
ガラスハーメチック層８を介して電池蓋９に挿着されて
いる。電池蓋９の周縁端部は、電池ケース１の開口部に
溶接され（溶接部１２）、完全密閉構造になっている。Thionyl chloride solution containing lithium aluminum tetrachloride 6
The separator 3, the top paper 3a, the bottom paper 3b, and the carbon molded body 4 are partially impregnated with the carbon material. Most of the lower part of the nickel current collector 6 is buried in the carbon molded body 4, and the upper tip is welded to the upper tip of the stainless steel pipe 7 (welded part 11). The stainless steel pipe 7 that also serves as the other polarity terminal is
It is inserted into the battery cover 9 via the glass hermetic layer 8. The peripheral end of the battery cover 9 is welded to the opening of the battery case 1 (welded portion 12), creating a completely sealed structure.
電池ケース１の底部１ｏの内面に凸部１３．外面に凹部
１４を部分的に形成し、底部１ｏの内面の凸部１３以外
の面１０１Ｌと対向する凹部１４の底面１４＆に挾まれ
た薄肉部１６を設けている。第２図は、第１図に示す本
発明の実施例による密閉形電池に用いた電池ケースのプ
レス成形による薄肉加工の状態を示す要部拡大断面図で
ある。第２図において、金型ムと金型Ｂによるプレス成
形によって、電池ケース１の底部１ｏの内面に凸部１３
．外面に凸部１３より大きな径を有する凹部１４を形成
すると、ケース材料が矢印Ｃに示すように逃げて、凸部
以外の電池ケースの底部の内面１０１Ｌと対向する凹部
１４の底面１４２Ｌに挾まれた薄肉部１６が形成されて
いる。A convex portion 13 is provided on the inner surface of the bottom portion 1o of the battery case 1. A recess 14 is partially formed on the outer surface, and a thin portion 16 is provided between the bottom surface 14& of the recess 14 facing the surface 101L of the inner surface of the bottom 1o other than the convex portion 13. FIG. 2 is an enlarged cross-sectional view of a main part showing a state in which the battery case used in the sealed battery according to the embodiment of the present invention shown in FIG. 1 is thin-walled by press molding. In FIG. 2, a convex portion 13 is formed on the inner surface of the bottom portion 1o of the battery case 1 by press molding using a mold M and a mold B.
．． When a concave portion 14 having a larger diameter than the convex portion 13 is formed on the outer surface, the case material escapes as shown by arrow C and is sandwiched between the bottom surface 142L of the concave portion 14 opposite to the inner surface 101L of the bottom of the battery case other than the convex portion. A thin wall portion 16 is formed.
第３図は１本発明による電池ケースを真下から見た外観
図である。第３図において、斜線部で示すように、金型
Ｂにぬすみを設けることにより凹部１４の底面１４＆の
形状を変形させ、その結果、薄肉部１６の平面形状が略
Ｃ形状になっている。FIG. 3 is an external view of a battery case according to the present invention viewed from directly below. In FIG. 3, as shown by the hatched area, the shape of the bottom surface 14& of the recess 14 is deformed by providing a recess in the mold B, and as a result, the planar shape of the thin portion 16 becomes approximately C-shaped.
量産対応における防爆機能の作動の安全性を以下の方法
で評価した。電池ケースの材料にステンレス鋼（ＳＵＳ
３ｏ４）を用いて、薄肉加工金型の材料に超硬を用いた
。金型形状については、本発明の場合、第２図に示すＲ
，、Ｒ２を各々０．１６鱈とし、θ１．θ２を各々１Ｑ
ｏ０とし、Ｗは。The safety of the activation of the explosion-proof function in mass production was evaluated using the following method. Stainless steel (SUS) is used as the material for the battery case.
3o4), and carbide was used as the material for the thin-walled mold. Regarding the mold shape, in the case of the present invention, R as shown in FIG.
, , R2 are each 0.16 cod, and θ1. θ2 each 1Q
Let o0 be W.
０．１５ｆｆと０．３０１’ｌの２種類を用いて、金型
ム金型Ｂの間隔（薄肉加工部）ｔを０．０５ ｆｌに設
定し、従来の構成の場合は、第６図に示すθを６０°と
し。Using two types of 0.15ff and 0.301'l, set the interval t between the mold B (thin-walled part) to 0.05 fl, and in the case of the conventional configuration, as shown in Fig. 6. Let θ shown be 60°.
Ｗは０．１５１１と０．３０鰭の２種類を用いて、金型
Ｄ（溝加工用ポンチ）と金型Ｘ（受台）の間隔ｔを０．
０６ ｆｆに設定し、溝の加工形状は十字状にした。尚
、加工荷重は全て一定で、薄肉部の加工面積は、ＷがＯ
Ａ５ＭＭと０．３０ｊｆｆの各々の比較において、本発
明と従来の構成が同じ面積になるようにした。以上の金
型構成において、まず１万個の薄肉加工を行なった後１
次に加工した６０個を抜き取り、更に１０万個の薄肉加
工を行なった後。Two types of W were used, 0.1511 and 0.30 fins, and the distance t between the mold D (grooving punch) and the mold X (pedestal) was set to 0.
06 ff, and the groove was machined into a cross shape. In addition, the machining load is all constant, and the machining area of the thin part is
In each comparison between A5MM and 0.30jff, the present invention and the conventional configuration were made to have the same area. In the above mold configuration, first 10,000 thin-walled pieces are processed, then 1
Next, the processed 60 pieces were extracted and 100,000 pieces were thin-walled.
次に加工した６０個を抜き取り、それらを１０１０℃で
１０分間焼鈍し、作動圧を測定した結果の度数分布を第
４図に示した。また、加工後の金型の損傷状況も比較し
た。Next, 60 processed pieces were extracted and annealed at 1010°C for 10 minutes, and the frequency distribution of the results of measuring the working pressure is shown in Figure 4. We also compared the damage to the molds after processing.
第４図に示すように１本発明による薄肉加工を施した電
池ケースの方が、従来の構成による薄肉加工を施した電
池ケースよりも、量産対応において作動圧のバラツキが
小さく、また作動圧のレベルの変化も殆どない。従来の
電池ケースの作動圧の高いものについて、薄肉部の厚み
を測定した結果、金型の設定（ｔ＝ｏ、ｏ６ｍ）よりも
大きい値であった。これは、薄肉部のケース材料の逃げ
が悪いため、加工荷重が不足していただめと思われる。As shown in Fig. 4, the battery case with the thin wall processing according to the present invention has smaller variations in operating pressure for mass production than the battery case with the conventional structure and thin wall processing. There is almost no change in level. As a result of measuring the thickness of the thin portion of a conventional battery case with high operating pressure, the thickness was larger than the mold setting (t=o, o6m). This is thought to be due to insufficient machining load due to poor escape of the case material in the thin wall portion.
加工後の金型の損傷状況については、従来の構成では、
溝加工用ポンチの第６図に示す３Ｊに相当する部分の損
傷が見られ、特に溝の交点近傍に相当する部分の破損が
顕著であったのに対し１本発明による金型においては殆
ど損傷が見られなかった。Regarding the damage status of the mold after processing, in the conventional configuration,
Damage was observed in the part corresponding to 3J shown in Figure 6 of the groove processing punch, and the damage was particularly noticeable in the part corresponding to the intersection of the grooves, whereas in the mold according to the present invention, there was almost no damage. was not seen.
発明の効果
以上のように本発明によれば、プレス成形による薄肉加
工時に、薄肉部分のケース材料が逃げ易いため、加工荷
重が小さくて済み、また、ポンチ自体の加工部の肉厚を
確保する設計ができるので。Effects of the Invention As described above, according to the present invention, when thin-walled by press forming, the case material in the thin-walled part easily escapes, so the processing load is small, and the thickness of the processed part of the punch itself is ensured. Because I can design it.
ポンチの負担が軽減できる。そこで、量産対応において
も、金凰の損傷が殆どなく、プレス成形による薄肉加工
を安定して行なうことができる。そして、電池の内圧が
異常に上昇した場合には所定の面積が完全に開放して、
電池内部で発生したガスの逸散を充分に行なうことがで
き、安全性が高く且つ量産性のある防爆機能を備えるこ
とができるという効果が得られる。The burden on the punch can be reduced. Therefore, even in mass production, there is almost no damage to the metal enamel, and thin-wall processing by press molding can be stably performed. If the internal pressure of the battery rises abnormally, the predetermined area will be completely opened.
It is possible to sufficiently dissipate the gas generated inside the battery, and it is possible to provide an explosion-proof function that is highly safe and suitable for mass production.
第１図は本発明の一実施例による密閉形電池の半裁断面
図、第２図は第１図に示す本発明の実施例による密閉形
電池に用いた電池ケースのプレス成形による薄肉加工の
状態を示す要部拡大断面図、第３図は本発明による電池
ケースを真下から見た外観図、第４図は量産対応におけ
る防爆の作動の安定性を評価した度数分布図、第６図は
従来の構成による密閉形電池を示す半裁断面図、第６図
は第６図に示す従来の構成による密閉形電池に用いた電
池容器の、プレス成形による薄肉加工の状態を示す要部
拡大断面図である。
１・・・・・・電池ケース、２・・・・・・金属リチウ
ム（負極）、３・・・・・・セパレータ、３１Ｌ・・・
・・・上紙、３ｂ・・・・・・底紙、４・・・・・・炭
素成形体（正極）、６・・・・・・正極活物質兼電解液
、６・・・・・・集電体、７・・・・・・金属パイプ、
８・・・・・・ガラスハーメチック層、９・・・・・・
電池蓋、１０・・・・・・電池ケースの底部、１０！Ｌ
・・・・・・凸部以外のケース底部内面、１１．１２・
・・・・・溶接部、１３・・・・・・凸部、１４・・・
・・・凹部、１４ａ・・・・・・凹部の底面、１６・・
・・・・薄肉部。
代理人の氏名 弁理士 粟 野 重 孝 ほか１名第４
図
「◆・−凹部
Ｉ４＆−−・凹１Ｐの／ｉｆｌ
＋ｙ−４＊枠
イ一一−＜ｔγ−ス
２−４シ島り子つ４０載閾υ
５・・−ぜバし−９
３ｅＬ−−一上加＼
７−・−表番７（）ヂ
Ｂ・−一７”ラスハーメナ、１２４FIG. 1 is a half-cut sectional view of a sealed battery according to an embodiment of the present invention, and FIG. 2 is a state of thin wall processing by press molding of a battery case used in the sealed battery according to an embodiment of the present invention shown in FIG. Figure 3 is an external view of the battery case according to the present invention viewed from directly below, Figure 4 is a frequency distribution diagram evaluating the stability of explosion-proof operation in mass production, and Figure 6 is the conventional battery case. FIG. 6 is an enlarged sectional view of a main part of a battery container used in a sealed battery having the conventional structure shown in FIG. be. 1...Battery case, 2...Metal lithium (negative electrode), 3...Separator, 31L...
...Top paper, 3b...Bottom paper, 4...Carbon molded body (positive electrode), 6...Positive electrode active material and electrolyte solution, 6...・Current collector, 7...Metal pipe,
8...Glass hermetic layer, 9...
Battery cover, 10...Bottom of battery case, 10! L
...Inner surface of the bottom of the case other than the convex portion, 11.12.
...Welded part, 13... Convex part, 14...
...Recess, 14a...Bottom of recess, 16...
...Thin wall part. Name of agent: Patent attorney Shigetaka Awano and 1 other person No. 4
Figure ``◆・-Concave I4 & --・Concave 1P /ifl +y-4*Frame I1-<tγ-S2-4 Shishima Rikotsu 40 threshold υ 5...-Zebashi-9 3eL --Ichijoka＼ 7-・-Table number 7()jiB・-17”Lashamena, 124
Claims (2)
方に凸部、他方に該凸部よりも大きな凹部を部分的に形
成し、該凸部以外の面と対向する該凹部の底面に挾まれ
た薄肉部を設けたことを特徴とする密閉形電池。(1) A convex portion is partially formed on one of the inner and outer surfaces of the bottom of the bottom battery case, and a concave portion larger than the convex portion is partially formed on the other side, and the bottom surface of the concave portion faces the surface other than the convex portion. A sealed battery characterized by having a thin-walled part sandwiched between.
とを特徴とする特許請求の範囲第１項記載の密閉形電池
。(2) The sealed battery according to claim 1, wherein the thin portion has a substantially C-shaped planar shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1103893A JPH02281552A (en) | 1989-04-24 | 1989-04-24 | Sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1103893A JPH02281552A (en) | 1989-04-24 | 1989-04-24 | Sealed battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02281552A true JPH02281552A (en) | 1990-11-19 |
Family
ID=14366102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1103893A Pending JPH02281552A (en) | 1989-04-24 | 1989-04-24 | Sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02281552A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04366545A (en) * | 1991-06-13 | 1992-12-18 | Toyo Takasago Kandenchi Kk | Sealed battery |
| JPH0638155U (en) * | 1992-10-26 | 1994-05-20 | 株式会社ユアサコーポレーション | Sealed battery |
| JP2000311669A (en) * | 1999-04-27 | 2000-11-07 | Shin Kobe Electric Mach Co Ltd | Safety valve for rectangular nonaqueous electrolyte secondary battery |
| US8187742B2 (en) * | 2007-04-20 | 2012-05-29 | Samsung Sdi Co., Ltd. | Rechargeable battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59154743A (en) * | 1983-02-23 | 1984-09-03 | Hitachi Maxell Ltd | Sealed type battery |
| JPS6360273B2 (en) * | 1981-01-04 | 1988-11-24 |
-
1989
- 1989-04-24 JP JP1103893A patent/JPH02281552A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6360273B2 (en) * | 1981-01-04 | 1988-11-24 | ||
| JPS59154743A (en) * | 1983-02-23 | 1984-09-03 | Hitachi Maxell Ltd | Sealed type battery |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04366545A (en) * | 1991-06-13 | 1992-12-18 | Toyo Takasago Kandenchi Kk | Sealed battery |
| JPH0638155U (en) * | 1992-10-26 | 1994-05-20 | 株式会社ユアサコーポレーション | Sealed battery |
| JP2000311669A (en) * | 1999-04-27 | 2000-11-07 | Shin Kobe Electric Mach Co Ltd | Safety valve for rectangular nonaqueous electrolyte secondary battery |
| US8187742B2 (en) * | 2007-04-20 | 2012-05-29 | Samsung Sdi Co., Ltd. | Rechargeable battery |
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