JPH07272703A - Button type air battery - Google Patents
Button type air batteryInfo
- Publication number
- JPH07272703A JPH07272703A JP6057341A JP5734194A JPH07272703A JP H07272703 A JPH07272703 A JP H07272703A JP 6057341 A JP6057341 A JP 6057341A JP 5734194 A JP5734194 A JP 5734194A JP H07272703 A JPH07272703 A JP H07272703A
- Authority
- JP
- Japan
- Prior art keywords
- air
- positive electrode
- battery
- electrode case
- convex 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.)
- Granted
Links
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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ボタン形空気電池の、
とくにその断面が略Ｌ字状の絶縁パッキングを用いた封
口構造に関するものである。BACKGROUND OF THE INVENTION The present invention relates to a button type air battery,
Particularly, the present invention relates to a sealing structure using an insulating packing having a substantially L-shaped cross section.
【０００２】[0002]
【従来の技術】従来のボタン形空気電池の断面図を図４
に示す。2. Description of the Related Art A sectional view of a conventional button type air battery is shown in FIG.
Shown in.
【０００３】１は負極ケース、２は亜鉛とアルカリ電解
液からなる負極、３は断面略Ｌ字状の絶縁ガスケット、
４は触媒層と撥水層とからなる空気極、５はセパレー
タ、６は正極ケース、７は電解液の電池外部への漏出を
防止するための撥水膜、８は空気拡散紙、９は正極ケー
スの底面から上方に向かって同心円状に形成された凸
部、１０は正極ケース底面に設けられた空気取り入れ孔
である。Reference numeral 1 is a negative electrode case, 2 is a negative electrode made of zinc and an alkaline electrolyte, 3 is an insulating gasket having a substantially L-shaped cross section,
Reference numeral 4 is an air electrode composed of a catalyst layer and a water repellent layer, 5 is a separator, 6 is a positive electrode case, 7 is a water repellent film for preventing leakage of an electrolytic solution to the outside of the battery, 8 is air diffusion paper, and 9 is Convex portions 10 formed concentrically upward from the bottom surface of the positive electrode case are air intake holes provided on the bottom surface of the positive electrode case.
【０００４】空気拡散紙８は、圧縮されて空気拡散機能
が低下しないように、正極ケース底面の凸部９によって
形成された凹部内に収納されている。The air diffusion paper 8 is housed in a concave portion formed by a convex portion 9 on the bottom surface of the positive electrode case so as not to be compressed and the air diffusion function is deteriorated.
【０００５】また、この空気拡散紙８の上部にはシート
状の撥水膜７、空気極４およびセパレータ５が積層され
ており、空気極４とセパレータ５は正極ケース底面の凸
部９より上方に位置している。A sheet-shaped water-repellent film 7, an air electrode 4 and a separator 5 are laminated on the upper part of the air diffusion paper 8, and the air electrode 4 and the separator 5 are located above the convex portion 9 on the bottom surface of the positive electrode case. Is located in.
【０００６】そして、絶縁ガスケット３の平面状底部と
正極ケース底面の凸部９とで、空気極４およびセパレー
タ５を押圧挟持することによりこれらを固定して、電池
を封口し電解液の漏出を防止している。Then, the flat bottom of the insulating gasket 3 and the convex portion 9 on the bottom surface of the positive electrode case fix the air electrode 4 and the separator 5 by pressing and holding them, and seal the battery to prevent leakage of the electrolytic solution. To prevent.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、この構
成のボタン形空気電池では、図５にその絶縁ガスケット
底部の拡大断面図を示したように、正極ケース底面の凸
部と正極ケース側面との間の同心円状凹部内で、絶縁ガ
スケット底部、正極ケースおよび空気極の間に隙間が生
じていた。However, in the button type air battery of this structure, as shown in the enlarged cross-sectional view of the bottom of the insulating gasket in FIG. 5, there is a gap between the convex portion on the bottom surface of the positive electrode case and the side surface of the positive electrode case. In the concentric concave portion, there was a gap between the insulating gasket bottom, the positive electrode case and the air electrode.
【０００８】このため、前記凸部９の両側で空気極４が
上下方向に湾曲して、空気極にひずみ、変形が生じ、絶
縁ガスケット、正極ケースおよび空気極との間に生じた
隙間から電解液が漏出して電池の耐漏液性が低下してい
た。For this reason, the air electrode 4 is bent in the vertical direction on both sides of the convex portion 9 and the air electrode is distorted and deformed, and electrolysis is performed from the gap formed between the insulating gasket, the positive electrode case and the air electrode. The liquid leaked out and the leak resistance of the battery was lowered.
【０００９】また、空気極の変形が大きいと、電解液を
含む負極の空気極による圧縮力が低下して変形部分に電
解液が過剰に滞り、この溜った電解液によって空気極へ
のガス透過性が低下して電池の放電特性が低下してい
た。Further, if the air electrode is greatly deformed, the compressive force of the air electrode of the negative electrode containing the electrolyte solution is reduced, and the electrolyte solution is excessively retained in the deformed portion, and the accumulated electrolyte solution permeates the gas to the air electrode. And the discharge characteristics of the battery were deteriorated.
【００１０】本発明は、このような課題を解決するもの
であり、正極ケース底面の凸部によって形成された凹部
内に空気拡散紙を収納したボタン形空気電池において、
絶縁ガスケットと正極ケース底面の凸部によって空気極
を湾曲しないように固定し、電池を液密に封口して耐漏
液性および放電特性に優れたボタン形空気電池を提供す
るものである。The present invention is intended to solve such a problem, and a button type air battery in which an air diffusion paper is housed in a concave portion formed by a convex portion on the bottom surface of the positive electrode case is provided.
(EN) A button type air battery excellent in liquid leakage resistance and discharge characteristics by fixing an air electrode so as not to bend by an insulating gasket and a convex portion on the bottom surface of a positive electrode case and sealing the battery in a liquid-tight manner.
【００１１】[0011]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明のボタン形空気電池は、底面に空気取り入
れ孔があるとともに、底面から電池内側に向かって同心
円状に凸部が形成された正極ケースと、前記凸部によっ
て形成された正極ケースの凹部内に収納した空気拡散紙
と、前記空気拡散紙と凸部の上に配され、凸部が形成す
る同心円より大きいシート状の空気極と、内部に負極を
収納した負極ケースと、前記空気極の周縁部を上方から
押圧するとともに、正、負極ケース間を絶縁する断面略
Ｌ字形の絶縁ガスケットとからなり、前記絶縁パッキン
グの底部断面は、前記正極ケース底面の凸部と正極ケー
ス側面との間の同心円状凹部に向かって凸形になってい
るものである。In order to solve the above-mentioned problems, the button type air battery of the present invention has an air intake hole on the bottom surface, and a convex portion is formed concentrically from the bottom surface toward the inside of the battery. Positive electrode case, an air diffusing paper housed in the concave portion of the positive electrode case formed by the convex portion, a sheet-like sheet that is arranged on the air diffusing paper and the convex portion, and is larger than the concentric circle formed by the convex portion. An air electrode, a negative electrode case having a negative electrode housed therein, and an insulating gasket having a substantially L-shaped cross section that presses the peripheral portion of the air electrode from above and insulates between the positive and negative electrode cases. The bottom cross section is convex toward the concentric concave portion between the convex portion on the bottom surface of the positive electrode case and the side surface of the positive electrode case.
【００１２】[0012]
【作用】本発明のボタン形空気電池では、底面から内側
に向かって同心円状に形成された凸部を有する正極ケー
ス内で、前記同心円より大きいシート状空気極の周縁部
を、底部断面が正極ケース底面の凸部と正極ケース側面
との間の同心円状凹部に向かって凸形になっている絶縁
ガスケットで押圧して固定している。In the button type air battery of the present invention, in the positive electrode case having the convex portion formed concentrically from the bottom surface toward the inner side, the peripheral portion of the sheet-like air electrode larger than the concentric circle has the bottom cross section of the positive electrode. It is fixed by pressing with an insulating gasket that is convex toward the concentric concave portion between the convex portion on the bottom surface of the case and the side surface of the positive electrode case.
【００１３】このため、空気極の周縁部を、絶縁ガスケ
ットと正極ケースとによって下方に引っ張るように挟持
しているので、空気極が上下方向に湾曲することはな
く、空気極の一部に電解液が過剰に溜ることを防止する
ことができ空気極における気−液−固相の三相界面を良
好に保って電池の放電特性を向上させることができる。For this reason, since the peripheral portion of the air electrode is sandwiched by the insulating gasket and the positive electrode case so as to be pulled downward, the air electrode is not bent in the vertical direction, and a part of the air electrode is electrolyzed. It is possible to prevent the liquid from accumulating excessively, and it is possible to improve the discharge characteristics of the battery by keeping the three-phase interface of gas-liquid-solid phase in the air electrode favorable.
【００１４】また、正極ケース底面の凸部と正極ケース
側面との間の同心円状凹部内で、絶縁ガスケット底部、
正極ケースおよび空気極の周縁部が隙間なく密着してい
るので、この部分を完全に密封することができ液密状態
で耐漏液性に優れた空気電池を提供できる。Further, in the concentric concave portion between the convex portion on the bottom surface of the positive electrode case and the side surface of the positive electrode case, the insulating gasket bottom portion,
Since the positive electrode case and the peripheral portion of the air electrode are in close contact with each other without a gap, this portion can be completely sealed, and an air cell excellent in liquid leakage resistance in a liquid tight state can be provided.
【００１５】[0015]
【実施例】以下、本発明の実施例を図面を参照にしなが
ら説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１６】図１に本発明のボタン形空気電池の絶縁ガ
スケット底部の拡大断面図を示す。３は正極ケース底面
の凸部９と正極ケース側面との間の同心円状凹部１１の
断面形状に沿った形状の凸部１２を備えた本発明の絶縁
ガスケットである。FIG. 1 shows an enlarged sectional view of the bottom of the insulating gasket of the button type air battery of the present invention. Reference numeral 3 is an insulating gasket of the present invention having a convex portion 12 having a shape along the cross-sectional shape of the concentric concave portion 11 between the convex portion 9 on the bottom surface of the positive electrode case and the side surface of the positive electrode case.
【００１７】図１に示したように、空気極４の周縁部
を、絶縁ガスケット３の凸部１２と正極ケース底面の凸
部９で下方に引っ張るように挟持しているので、空気極
を湾曲することなく固定することができる。As shown in FIG. 1, since the peripheral portion of the air electrode 4 is sandwiched by the convex portion 12 of the insulating gasket 3 and the convex portion 9 on the bottom surface of the positive electrode case so as to be pulled downward, the air electrode is curved. It can be fixed without doing.
【００１８】また、空気極の周縁部と絶縁ガスケットお
よび正極ケースは隙間なく密着しているので、完全密封
により電池の耐漏液性を向上させることができる。Further, since the peripheral portion of the air electrode, the insulating gasket and the positive electrode case are in close contact with each other without a gap, the liquid leakage resistance of the battery can be improved by perfect sealing.
【００１９】一方、比較の電池として図４に示したよう
なボタン形空気電池を作製し、これを従来の電池とし
た。On the other hand, as a comparative battery, a button type air battery as shown in FIG. 4 was produced and used as a conventional battery.
【００２０】ここで、本発明と従来のボタン形空気電池
の大きさは直径７．９mm、高さ５．４mmとした。Here, the size of the button type air battery according to the present invention and the conventional one is 7.9 mm in diameter and 5.4 mm in height.
【００２１】ついで、本発明と従来の電池をそれぞれ１
０個ずつ用いて、耐漏液性試験を行った。Next, the present invention and the conventional battery are respectively
A leak resistance test was performed by using 0 pieces each.
【００２２】耐漏液性試験は、電池の空気取り入れ孔を
密封した状態で、電池を温度６０℃湿度９０％の雰囲気
下で２００，４００，６００，８００，１０００，１２
００時間保存して、各時間経過時の漏液個数を調べた。The liquid leakage resistance test is carried out in a state where the air intake hole of the battery is sealed and the battery is heated to 200, 400, 600, 800, 1000, 12 in an atmosphere of a temperature of 60 ° C. and a humidity of 90%.
The sample was stored for 00 hours, and the number of leaked liquids at each time elapsed was examined.
【００２３】この結果を（表１）に示す。The results are shown in (Table 1).
【００２４】[0024]
【表１】 [Table 1]
【００２５】（表１）に示したように、本発明の電池で
は絶縁ガスケットと正極ケースとの間で空気極が隙間な
く密着した状態で固定されているので、電池の耐漏液性
を向上させることができた。As shown in (Table 1), in the battery of the present invention, the air electrode is fixed between the insulating gasket and the positive electrode case in a state where the air electrode is in close contact with no gap, so that the liquid leakage resistance of the battery is improved. I was able to.
【００２６】次に本発明と従来の電池を用い、温度６０
℃湿度７０％の雰囲気下で抵抗６２０Ωでの放電を行
い、このときの電圧変化を調べた。Next, using the battery of the present invention and a conventional battery, a temperature of 60 was used.
Discharge was performed at a resistance of 620Ω in an atmosphere of 70 ° C and 70% humidity, and the voltage change at this time was examined.
【００２７】この結果を図２に示す。図２に示したよう
に、本発明の電池では、空気極の周縁部を、絶縁ガスケ
ットと正極ケースによって下方に引っ張るように挟持し
ているので、空気極がひずむことなく固定され、空気極
の一部に電解液が過剰に溜ることを防止して電池の放電
特性を向上させることができた。The results are shown in FIG. As shown in FIG. 2, in the battery of the present invention, the peripheral portion of the air electrode is sandwiched by the insulating gasket and the positive electrode case so as to be pulled downward. Therefore, the air electrode is fixed without being distorted, and It was possible to improve the discharge characteristics of the battery by preventing the electrolytic solution from being excessively accumulated in a part.
【００２８】さらに、本発明のボタン形空気電池の他の
例を図３に示す。図３に示したように、３は底部が平面
状の絶縁ガスケットであり、１３は正極ケース底面の凸
部９と正極ケース側面との間の同心円状凹部１１に収納
された耐アルカリ性のフッ素樹脂製Ｏリングである。こ
のため、空気極４の周縁部は、絶縁ガスケット３の底部
とＯリング１３によって密着した状態で固定されている
ので、電池の耐漏液性を向上させることができる。ま
た、絶縁ガスケットを押圧するとＯリングが圧縮される
が、このときの下向きの力により空気極の周縁部が下方
に引っ張られて固定されるので、空気極にひずみが生じ
ることはない。Further, another example of the button type air battery of the present invention is shown in FIG. As shown in FIG. 3, 3 is an insulating gasket having a flat bottom, and 13 is an alkali-resistant fluororesin housed in a concentric recess 11 between the protrusion 9 on the bottom surface of the positive electrode case and the side surface of the positive electrode case. It is an O-ring made. For this reason, the peripheral portion of the air electrode 4 is fixed in a state of being in close contact with the bottom portion of the insulating gasket 3 by the O-ring 13, so that the liquid leakage resistance of the battery can be improved. Further, when the insulating gasket is pressed, the O-ring is compressed, but the downward force at this time pulls and fixes the peripheral edge of the air electrode downward, so that the air electrode is not distorted.
【００２９】[0029]
【発明の効果】以上のように、本発明のボタン形空気電
池は、底面から内側に向かって同心円状に形成された凸
部を有する正極ケース内で、前記同心円より大きいシー
ト状空気極の周縁部を、絶縁ガスケットと正極ケースに
よって隙間が生じることなく挟持し固定している。As described above, in the button type air battery of the present invention, in the positive electrode case having the convex portion formed concentrically from the bottom surface toward the inner side, the periphery of the sheet-like air electrode larger than the concentric circle is provided. The part is clamped and fixed by the insulating gasket and the positive electrode case without a gap.
【００３０】このため、空気極、絶縁ガスケットおよび
正極ケースの隙間から電解液が漏出することはない。Therefore, the electrolytic solution does not leak from the gap between the air electrode, the insulating gasket and the positive electrode case.
【００３１】また、空気極をひずむことなく固定してい
るので、空気極の一部に電解液が過剰に溜まることを防
止することができ、空気極における気−液−固相の三相
界面を良好に保って電池の放電特性を向上させることが
できる。Further, since the air electrode is fixed without being distorted, it is possible to prevent the electrolytic solution from excessively accumulating in a part of the air electrode, and the three-phase interface of gas-liquid-solid phase in the air electrode. Can be maintained satisfactorily and the discharge characteristics of the battery can be improved.
【図１】本発明のボタン形空気電池の絶縁ガスケット底
部の拡大断面図FIG. 1 is an enlarged sectional view of an insulating gasket bottom portion of a button type air battery of the present invention.
【図２】本発明と従来のボタン形空気電池の放電特性を
示す図FIG. 2 is a diagram showing discharge characteristics of the present invention and a conventional button type air battery.
【図３】本発明のボタン形空気電池の他の例を示す図FIG. 3 is a diagram showing another example of the button type air battery of the present invention.
【図４】従来のボタン形空気電池の断面図FIG. 4 is a sectional view of a conventional button type air battery.
【図５】同電池の絶縁ガスケット底部の拡大断面図FIG. 5 is an enlarged sectional view of the bottom of the insulating gasket of the battery.
１ 負極ケース ２ 負極 ３ 絶縁ガスケット ４ 空気極 ５ セパレータ ６ 正極ケース ７ 撥水膜 ８ 空気拡散紙 ９ 正極ケース底面の凸部 １０ 空気取り入れ孔 １１ 同心円状凹部 １２ 絶縁ガスケット底部の凸部 １３ Ｏリング 1 Negative Electrode Case 2 Negative Electrode 3 Insulation Gasket 4 Air Electrode 5 Separator 6 Positive Electrode Case 7 Water-Repellent Film 8 Air Diffusing Paper 9 Protrusions on Bottom of Positive Electrode Case 10 Air Intake Holes 11 Concentric Concave 12 Protrusions on Bottom of Insulation Gasket 13 O-ring
Claims (4)
面から電池内側に向かって同心円状に凸部が形成された
正極ケースと、 前記凸部によって形成された正極ケースの凹部内に収納
した空気拡散紙と、 前記空気拡散紙と凸部の上に配され、凸部が形成する同
心円より大きいシート状の空気極と、 内部に負極を収納した負極ケースと、 前記空気極の周縁部を上方から押圧するとともに、正、
負極ケース間を絶縁する断面略Ｌ字形の絶縁ガスケット
とからなり、 前記絶縁ガスケットの底部断面は、前記正極ケース底面
の凸部と正極ケース側面との間の同心円状凹部に向かっ
て凸形になっているボタン形空気電池。1. A positive electrode case having an air intake hole on the bottom surface, and a convex portion formed in a concentric shape from the bottom surface toward the inside of the battery, and air contained in the concave portion of the positive electrode case formed by the convex portion. A diffusion paper, a sheet-shaped air electrode that is arranged on the air diffusion paper and the convex portion and is larger than a concentric circle formed by the convex portion, a negative electrode case that accommodates a negative electrode inside, and a peripheral portion of the air electrode that is upward. While pressing from the positive,
The insulating gasket has a substantially L-shaped cross section for insulating between negative electrode cases, and the bottom cross section of the insulating gasket is convex toward a concentric circular concave portion between the convex portion on the bottom surface of the positive electrode case and the side surface of the positive electrode case. Button type air battery.
ス底面の凸部と正極ケース側面との間の同心円状凹部の
断面形状に沿った形状の凸形になっている請求項１記載
のボタン形空気電池。2. The button shape according to claim 1, wherein the cross section of the bottom of the insulating gasket is a convex shape along the cross-sectional shape of the concentric circular concave portion between the convex portion on the bottom surface of the positive electrode case and the side surface of the positive electrode case. Air battery.
外側に向かって傾斜した略三角形の凸形になっている請
求項１記載のボタン形空気電池。3. A button type air battery according to claim 1, wherein the bottom section of the insulating gasket has a substantially triangular convex shape inclined toward the outside of the gasket.
面から電池内側に向かって同心円状に凸部が形成された
正極ケースと、 前記凸部によって形成された正極ケースの凹部内に収納
した空気拡散紙と、 前記空気拡散紙と凸部の上に配され、凸部が形成する同
心円より大きいシート状の空気極と、 内部に負極を収納した負極ケースと、 前記空気極の周縁部を上方から押圧するとともに、正、
負極ケース間を絶縁する断面略Ｌ字形の絶縁ガスケット
とからなり、 前記正極ケース底面の凸部と正極ケース側面との間の同
心円状凹部にＯリングを収納して、前記絶縁ガスケット
とＯリングによって空気極の周縁部を押圧挟持している
ボタン形空気電池。4. A positive electrode case having an air intake hole on the bottom surface and concentric convex portions formed from the bottom surface toward the inside of the battery, and air contained in the concave portion of the positive electrode case formed by the convex portion. A diffusion paper, a sheet-shaped air electrode that is arranged on the air diffusion paper and the convex portion and is larger than a concentric circle formed by the convex portion, a negative electrode case that accommodates a negative electrode inside, and a peripheral portion of the air electrode that is upward. While pressing from the positive,
An insulating gasket having a substantially L-shaped cross section that insulates between the negative electrode cases, and an O ring is housed in a concentric circular concave portion between the convex portion on the bottom surface of the positive electrode case and the side surface of the positive electrode case. A button type air battery that presses and holds the periphery of the air electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06057341A JP3136891B2 (en) | 1994-03-28 | 1994-03-28 | Button type air battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06057341A JP3136891B2 (en) | 1994-03-28 | 1994-03-28 | Button type air battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07272703A true JPH07272703A (en) | 1995-10-20 |
| JP3136891B2 JP3136891B2 (en) | 2001-02-19 |
Family
ID=13052878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06057341A Expired - Fee Related JP3136891B2 (en) | 1994-03-28 | 1994-03-28 | Button type air battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3136891B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010504615A (en) * | 2006-09-22 | 2010-02-12 | エバレデイ バツテリ カンパニー インコーポレーテツド | Battery having air electrode and biasing lever gasket |
| CN109193023A (en) * | 2018-09-18 | 2019-01-11 | 朱程显 | With lateral opening and convex surface steel loop lithium coin cells |
| CN111370636A (en) * | 2020-05-11 | 2020-07-03 | 福建南平延平区南孚新能源科技有限公司 | Production method of button battery without welding trace and button battery manufactured by same |
-
1994
- 1994-03-28 JP JP06057341A patent/JP3136891B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010504615A (en) * | 2006-09-22 | 2010-02-12 | エバレデイ バツテリ カンパニー インコーポレーテツド | Battery having air electrode and biasing lever gasket |
| CN109193023A (en) * | 2018-09-18 | 2019-01-11 | 朱程显 | With lateral opening and convex surface steel loop lithium coin cells |
| CN111370636A (en) * | 2020-05-11 | 2020-07-03 | 福建南平延平区南孚新能源科技有限公司 | Production method of button battery without welding trace and button battery manufactured by same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3136891B2 (en) | 2001-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |