CN1078750C - 二次电池的负电极结构 - Google Patents
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Abstract
一种镍金属氢化物二次电池,它包含:一个由正电极板、负电极板和插入它们之间的隔离板卷成的圆柱形的叠层构件,用于密封该叠层构件的保护亮以及电解液,负电极包括电解活性物质,一个用于承载电解活性物质并起集电器作用的多孔承载板,电解活性物质涂敷在该承载极的两个侧面,其中,使多孔承载板外侧部分的孔眼密度比中心部分的大,以便使多孔承载板和电解活性物质之间的粘合力在整个承载板上基本上均匀,并显著地提高承载板的集电能力。
Description
本发明涉及镍金属氢化物二次电池,它具有包括正电极板、负电极板和插入它们之间的隔离板卷成的圆柱形的叠层构件,更准确地说,涉及其负电极的结构。
目前,主要用镍镉电池作为二次电池。但是,这种电池的储存能量小,并且,镉产生严重的环境污染。因此,一种不产生环境污染并且其储存容量比镍镉电池大30%至50%的碱性镍金属氢化物二次电池有取代镍镉电池的趋势。这种镍金属氢化物电池包含金属氧化物正电极和储氢合金(hydrogen retainer alloy)负电极,因而具有高的输出强度。所述储氢合金吸收充电过程中产生的氢,而在放电过程中将氢释放到电解液中。
镍金属氢化物电池通常包含一个由正电极板、负电极板和插入它们之间的隔离板卷成的圆柱形的叠层构件,一个用于密封所述圆柱形叠层构件的保护外壳以及电解液。在这种碱性二次电池中,负电极需要一种用于承载电解活性物质并作为集电器的承载装置。这种承载装置通常由镀镍的多孔钢板构成,在该钢板的两侧面涂敷电解活性物质的浆料。
在这种情况下,多孔结构对电池的物理性能有不利的影响。例如,当增加整个承载板的孔眼密度时,承载板表面与电解活性物质之间的粘合力增强了,这样,活性物质从承载板脱离的现象减弱了,然而,承载板的集电能力减小了,而且,承载板的物理强度变弱,从而产生裂缝。相反,随着孔眼密度的减小,承载板的物理强度和集电能力提高了,但是,活性物质容易从承载板上脱离而导致电池使用寿命缩短。
按照常规,孔眼直径φ为1.0至2.5mm,两个相邻的孔眼开口中心的间距为1.0至3.0mm,而承载板的厚度为0.04至0.1mm。然而,尽管从中心部分到外侧部分,承载板与活性物质之间的粘合力是不同的,但整个承载板上孔眼直径和间距却是均匀的,结果是降低了集电能力并缩短了电池的使用寿命。
本发明的目的是提供一种用于改善碱性二次电池中承载板集电能力的装置。
本发明的另一个目的是提供一种用于改善碱性二次电池中负电极结构的强度的装置。
本发明的再一个目的是提供一种用于延长碱性二次电池的使用寿命的装置。
根据本发明的一个实施例,镍金属氢化物二次电池包含:
一个由正电极板、负电极板和插入它们之间的隔离板卷成的圆柱形的叠层构件,所述负电极板包括电解活性物质,一个用于承载所述电解活性物质并起集电器作用的多孔承载板,所述电解活性物质是涂敷在所述承载板的两个侧面;
一个用于密封所述卷成圆柱形叠层构件的保护外壳;以及
一种电解液,其中,使所述多孔承载板的外侧部分的孔眼密度大于中心部分的孔眼密度,结果是,在整个承载板上电解活性物质与承载板之间的粘合力基本上是均匀的,并且,显著地提高了所述承载板的集电能力。
本发明的一种情况是在整个承载板上保持孔眼开口直径不变而使两个相邻孔眼开口之间的距离变化,以便使外侧部分的孔眼密度大于中心部分的孔眼密度。
本发明的另一种情况是使孔眼的开口直径在整个承载板上变化而保持两个相邻孔眼的开口之间的距离不变,以便使外侧部分的孔眼密度大于中心部分的孔眼密度。
下面将参照仅作为实施例的附图更准确地说明本发明。
图1示出在传统的碱性二次电池的负电极中用于承载电解活性物质并作为集电器的多孔承载板;
图2是图1中所示的多孔承载板的外侧部分A的局部放大图;
图3是描绘本发明第一个实施例的多孔承载板结构的示意图;
图4是描绘本发明第二个实施例的多孔承载板结构的示意图;
图5是包含本发明结构的二次电池的示意的剖面图。
参照图5,镍金属氢化物二次电池由包括正电极板12、负电极板16和插入它们之间的隔离板14卷成的圆柱形的叠层构件18构成。电极叠层构件18密封在装有液态电解质的保护外壳10中。帽形组件20盖住外壳10的顶端。
为了制作本发明的二次电池负电极,首先制成镀镍的多孔承载钢板。使该多孔承载板外侧部分的孔眼密度比中心部分的孔眼密度大20%至30%。为此目的,参照图3本发明的第一实施例,使整个承载板上孔眼的口径φ′保持不变而使两个相邻孔眼的开口中心的间距P′x、P′y变化,以便使外侧部分的孔眼密度大于中心部分的孔眼密度。在这种情况下,在笛卡尔坐标系中量出所述间距P′x、P′y。即,使外侧部分的间距P′x、P′y比中心部分的减小20%至30%,以便使外侧部分的开口数目比中心部分的大。
参照图4本发明的第二实施例,使整个承载板上孔眼口径φ″变化而使两个相邻孔眼开口的间距保持不变,以便使外侧部分的孔眼密度比中心部分的大。即,使外侧部分的孔眼口径φ″比中心部分的大,从而,使外侧部分的孔眼密度比中心部分的大。
另外,可以将所述承载板划分成若干部分,以便它们具有彼此不同但从中心部分到外侧部分逐渐增加的孔眼密度。
这样,在整个承载板上,电解活性物质与承载板之间的粘合力基本上是均匀的,并且,显著地提高了承载板的集电能力。于是,所述电池的使用寿命显著地延长了,结果,获得了1000次以上的充、放电周期数,这与普通二次电池的大约500次的充、放电周期数形成鲜明的对比。当然,其集电能力提高了95%以上。
Claims (4)
1、一种镍金属氢化物二次电池,它包含:
一个由正电极板、负电极板和插入它们之间的隔离板卷成的圆柱形的叠层构件,所述负电极包括电解活性物质,一个用于承载所述电解活性物质并起集电器作用的多孔承载板,所述电解活性物质涂敷在所述承载板的两个侧面,
一个用于密封所述卷成圆柱形叠层构件的保护外壳,以及
电解液,其特征在于,所述多孔承载板外侧部分的孔眼密度比中心部分的大,以致所述承载板与所述电解活性物质之间的粘合力在整个所述承载板上基本上是均匀的、并显著地提高所述承载板的集电能力。
2、根据权利要求1的镍金属氢化物二次电池,其特征在于,在整个所述承载板上所述孔眼的口径保持不变而使两个相邻的所述孔眼的开口中心之间的距离变化,以便使所述外侧部分的孔眼密度比所述中心部分的大。
3、根据权利要求1的镍金属氢化物二次电池,其特征在于,使所述孔眼的口径在整个所述承载板上变化,而保持两个相邻的所述孔眼的开口中心之间的距离不变,以便使所述外侧部分的孔眼密度比所述中心部分的大。
4、根据权利要求1的镍金属氢化物二次电池,其特征在于,使所述孔眼口径和两个相邻的所述孔眼的开口中心之间的距离都在整个所述承载板上变化,以便使所述外侧部分的所述孔眼密度比所述中心部分的大。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR14252/95 | 1995-05-31 | ||
KR1019950014252A KR960043320A (ko) | 1995-05-31 | 1995-05-31 | 2차 전지 및 극판용 집전체 제조 방법 |
Publications (2)
Publication Number | Publication Date |
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CN1146641A CN1146641A (zh) | 1997-04-02 |
CN1078750C true CN1078750C (zh) | 2002-01-30 |
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Application Number | Title | Priority Date | Filing Date |
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CN95117211A Expired - Fee Related CN1078750C (zh) | 1995-05-31 | 1995-09-25 | 二次电池的负电极结构 |
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Country | Link |
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JP (1) | JPH08329951A (zh) |
KR (1) | KR960043320A (zh) |
CN (1) | CN1078750C (zh) |
DE (1) | DE19534928B4 (zh) |
FR (1) | FR2734949B1 (zh) |
Families Citing this family (4)
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KR200150028Y1 (ko) * | 1996-07-02 | 1999-07-01 | 손욱 | 무지부를 형성한 극판 |
CN103782438A (zh) * | 2011-09-14 | 2014-05-07 | 株式会社杰士汤浅国际 | 圆筒形电池 |
JP6094807B2 (ja) * | 2013-04-26 | 2017-03-15 | 株式会社Gsユアサ | 渦巻状電極群を備える電池 |
CN103825008B (zh) * | 2014-03-21 | 2016-01-13 | 中国科学院新疆理化技术研究所 | 一种三维多孔锂电池正极片的制备方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6037662A (ja) * | 1983-08-09 | 1985-02-27 | Sanyo Electric Co Ltd | 亜鉛極 |
WO1995006333A1 (en) * | 1993-08-27 | 1995-03-02 | Eveready Battery Company, Inc. | Electrode structure for nickel metal hydride cells |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5999675A (ja) * | 1982-11-30 | 1984-06-08 | Shin Kobe Electric Mach Co Ltd | アルカリ蓄電池 |
JPS59117062A (ja) * | 1982-12-23 | 1984-07-06 | Furukawa Battery Co Ltd:The | アルカリ電池用極板の製造方法 |
JPS6010560A (ja) * | 1983-06-29 | 1985-01-19 | Furukawa Battery Co Ltd:The | 鉛蓄電池極板用基板 |
JPH0680589B2 (ja) * | 1985-12-10 | 1994-10-12 | 松下電器産業株式会社 | ペ−スト式カドミウム電極 |
JP2975616B2 (ja) * | 1989-10-27 | 1999-11-10 | 東芝電池株式会社 | ニッケル酸化物・水素吸蔵合金二次電池 |
JPH056763A (ja) * | 1991-06-26 | 1993-01-14 | Shin Kobe Electric Mach Co Ltd | 極板用スポンジ状金属多孔体の製造方法 |
JP2592824Y2 (ja) * | 1992-10-26 | 1999-03-31 | 富士電気化学株式会社 | リチウム電池の正極集電体 |
US5527638A (en) * | 1993-06-30 | 1996-06-18 | Matsushita Electric Industrial Co., Ltd. | Hydrogen storage alloy electrode and sealed-type nickel-metal hydride storage battery using the same |
-
1995
- 1995-05-31 KR KR1019950014252A patent/KR960043320A/ko not_active Application Discontinuation
- 1995-09-20 DE DE19534928A patent/DE19534928B4/de not_active Expired - Fee Related
- 1995-09-25 CN CN95117211A patent/CN1078750C/zh not_active Expired - Fee Related
- 1995-09-28 FR FR9511410A patent/FR2734949B1/fr not_active Expired - Fee Related
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1996
- 1996-02-29 JP JP8041972A patent/JPH08329951A/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6037662A (ja) * | 1983-08-09 | 1985-02-27 | Sanyo Electric Co Ltd | 亜鉛極 |
WO1995006333A1 (en) * | 1993-08-27 | 1995-03-02 | Eveready Battery Company, Inc. | Electrode structure for nickel metal hydride cells |
Also Published As
Publication number | Publication date |
---|---|
DE19534928A1 (de) | 1996-12-05 |
FR2734949B1 (fr) | 1998-11-06 |
DE19534928B4 (de) | 2004-09-02 |
KR960043320A (ko) | 1996-12-23 |
JPH08329951A (ja) | 1996-12-13 |
CN1146641A (zh) | 1997-04-02 |
FR2734949A1 (fr) | 1996-12-06 |
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