JP3301309B2 - Alkaline secondary battery - Google Patents
Alkaline secondary batteryInfo
- Publication number
- JP3301309B2 JP3301309B2 JP10738196A JP10738196A JP3301309B2 JP 3301309 B2 JP3301309 B2 JP 3301309B2 JP 10738196 A JP10738196 A JP 10738196A JP 10738196 A JP10738196 A JP 10738196A JP 3301309 B2 JP3301309 B2 JP 3301309B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- alkaline secondary
- secondary battery
- plate electrode
- present
- 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.)
- Expired - Fee Related
Links
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000004049 embossing Methods 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
Landscapes
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電気自動車等の急
速充放電用のニッケルカドミウム蓄電池、ニッケル水素
蓄電池等のアルカリ二次電池に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alkaline secondary battery such as a nickel cadmium storage battery and a nickel hydrogen storage battery for rapid charging and discharging of electric vehicles and the like.
【０００２】[0002]
【従来の技術】電池容量が１０Ａｈを超える大容量のア
ルカリ二次電池では、平板電極及びセパレータを積層
し、外装ケースが角型であるものが一般的に多く使用さ
れてきた。そして、平板電極及びセパレータを積層した
電極群を外装ケースに挿入する際に、スペーサの調整板
を一緒に挿入して電極群に加える圧力を調整してきた。
しかし、平板電極厚み、セパレータ厚みがバラツキを生
じたり、平板電極が湾曲を生じるため、スペーサの調整
板による電極群に加える圧力調整効果は不十分となる場
合があった。このため、電解液の液抵抗にバラツキを生
じ、電池個々の充電電圧、放電電圧のバラツキを生じて
いた。特に、急速充放電時に、この現象がより顕著化し
ていた。また、充放電を電圧制御する場合に大きな弊害
をもたらしていた。更に、電極群に加わる圧力調整効果
が不十分な場合、急速充電時に目的とする充電反応が速
やかに進行しないでガス発生反応の割合が増加し、電池
内部圧力が上昇し易くなり、充電受入れ量低下や短寿命
の弊害を招いていた。2. Description of the Related Art In general, a large-capacity alkaline secondary battery having a battery capacity exceeding 10 Ah, in which a plate electrode and a separator are laminated and an outer case is square, has been widely used. Then, when inserting the electrode group in which the plate electrode and the separator are laminated into the outer case, the pressure applied to the electrode group has been adjusted by inserting the adjusting plate of the spacer together.
However, since the thickness of the flat plate electrode and the thickness of the separator vary and the flat plate electrode is curved, the effect of adjusting the pressure applied to the electrode group by the adjusting plate of the spacer is sometimes insufficient. For this reason, the liquid resistance of the electrolytic solution varies, and the charging voltage and the discharging voltage of each battery vary. In particular, at the time of rapid charging and discharging, this phenomenon became more prominent. In addition, there has been a serious problem in controlling the voltage of charging and discharging. Further, when the effect of adjusting the pressure applied to the electrode group is insufficient, the target charging reaction does not proceed rapidly during rapid charging, the rate of gas generation reaction increases, the internal pressure of the battery tends to rise, and the amount of charge accepted. This has led to a reduction and a short service life.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上記問題点に
鑑みてなされたものであり、急速充放電時の電池個々の
充電電圧、放電電圧のバラツキが小さく、急速充電受入
れ量が大で長寿命となるアルカリ二次電池を提供しよう
とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a small variation in the charge voltage and discharge voltage of each battery during rapid charge and discharge, and a large amount of rapid charge. An object of the present invention is to provide an alkaline secondary battery having a long life.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に本発明は、平板電極及びセパレータを積層した電極群
を、金属製の角型電槽に挿入してなるアルカリ二次電池
であって、該平板電極に平行な電槽面にエンボスプレス
加工を施すことによって、前記電槽面に複数の円形の凹
みを設けたアルカリ二次電池とするものである。According to one aspect of the present invention, there is provided an alkaline secondary battery in which an electrode group in which a plate electrode and a separator are laminated is inserted into a metal square battery case. By performing embossing press processing on a battery case surface parallel to the plate electrode, a plurality of circular concaves are formed on the battery case surface.
This is an alkaline secondary battery provided only with the above.
【０００５】本発明は、外装ケース面にエンボスプレス
加工を施すことにより、平板電極厚み、セパレータ厚み
にバラツキを生じても電極群に十分な圧力が加えられる
ことが可能となった。また、平板電極が湾曲を生じても
エンボスプレス加工を施すことにより是正され、平板電
極とセパレータの密着性は良好なものとなる。このた
め、急速充放電時の電池個々の充電電圧、放電電圧のバ
ラツキが小さくなり、且つ急速充電受入れが大で長寿命
のアルカリ二次電池を提供できる。According to the present invention, a sufficient pressure can be applied to the electrode group even when the thickness of the flat plate electrode and the thickness of the separator are varied by applying the embossing press to the outer case surface. Further, even if the flat plate electrode is curved, it is corrected by performing the embossing press process, and the adhesion between the flat plate electrode and the separator is improved. For this reason, it is possible to provide a long-life alkaline secondary battery in which the variation in the charge voltage and the discharge voltage of each battery at the time of rapid charging and discharging is reduced, and the rapid charging is large, and the life is long.
【０００６】[0006]
【発明の実施の形態】以下、本発明を実施例に基づき説
明する。 （実施例１）定格容量が４０Ａｈの密閉式ニッケルカド
ミウム蓄電池を準備した。その電池正面図を図１に示
す。図１において、１は端子、２は平板電極に平行な電
槽面である。この電池の外装ケースは、ステンレス製
（ＳＵＳ３０４）を用いた。次にエンボスプレス加工の
概略図を図２に示す。平板電極及びセパレータを積層し
た電極群を、金属製の角型電槽に挿入して成るアルカリ
二次電池であって、該平板電極に平行な電槽面２に押し
型３を用いてエンボスプレス加工を施すものである。エ
ンボスプレス加工後の形状が、円形（直径８ｍｍ、片面
６個）のものを図３に示す。図３において、４は円形凹
部である。なお、エンボスプレス加工圧力は、２０００
Ｋｇにて実施した。一方、比較例として従来手法のエン
ボス加工処理を行わない電池を準備した。そして、本発
明である図３の円形のエンボスプレス加工処理した電池
と比較例の電池、各５０セルを放電末状態からの２５℃
における５ＣＡ（２００Ａ）で急速充電にて評価した。
６分目の充電電圧のバラツキを図４、図５に示す。ま
た、電池内圧が０．５Ｋｇ・ｃｍ-2に達するまでの充電
受入れ量のバラツキを図６、図７に示す。なお、充電受
入れ量は、定格容量に対する百分率で表した。これによ
り、本発明であるエンボスプレス加工を施すことにより
急速充電時の電圧バラツキが大幅に圧縮されるとともに
充電受入れ量が増大した。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments. (Example 1) A sealed nickel-cadmium storage battery having a rated capacity of 40 Ah was prepared. FIG. 1 shows a front view of the battery. In FIG. 1, reference numeral 1 denotes a terminal, and 2 denotes a battery case surface parallel to the flat plate electrode. The outer case of this battery was made of stainless steel (SUS304). Next, a schematic diagram of the embossing press working is shown in FIG. An alkaline secondary battery in which an electrode group in which a plate electrode and a separator are laminated is inserted into a metal square battery case, and an embossing press is carried out by using a pressing mold 3 on a battery case surface 2 parallel to the plate electrode. It is to be processed. FIG. 3 shows a shape having a circular shape (diameter 8 mm, six on one side) after embossing. In FIG. 3, reference numeral 4 denotes a circular recess. The embossing pressure was 2000
Performed at Kg. On the other hand, as a comparative example, a battery not subjected to the conventional embossing treatment was prepared. Then, 50 cells of each of the battery of the present invention and the battery of the comparative example subjected to the embossing press processing of FIG.
5CA (200A) was evaluated by quick charging.
The variation of the charging voltage at the sixth minute is shown in FIGS. 6 and 7 show variations in the amount of charge that can be received until the internal pressure of the battery reaches 0.5 kg · cm −2 . In addition, the charge acceptance amount was represented by the percentage with respect to the rated capacity. As a result, by performing the embossing press work according to the present invention, the voltage variation at the time of quick charging is greatly reduced, and the charge acceptance amount is increased.
【０００７】（実施例２）２００Ａ充電（５ＣＡ）、１
００Ａ（２．５ＣＡ）×５分放電（放電深度定格容量比
２０．８％）を１サイクルとする４０℃でのサイクル充
放電試験結果を図８に示す。なお、放電容量は定格容量
に対する百分率で表した。電池は、実施例１で示した円
形のエンボスプレス加工を施した電池２０セルを直列に
接続したものを用いた。比較例として従来手法のエンボ
スプレス加工を施していない電池にて同様な試験を行っ
た。充電は、２０セル総電圧が３１．０Ｖに達した時点
で完了させ、放電サイクルに移行させた。従来手法のエ
ンボスプレス加工を施していない比較例の電池は、サイ
クル数を重ねるにつれ電池容量が低下しているが、本発
明であるエンボスプレス加工を施した電池は、安定して
電池容量が維持できている。(Embodiment 2) 200 A charging (5 CA), 1
FIG. 8 shows the results of a cycle charge / discharge test at 40 ° C., where one cycle is discharge at 00 A (2.5 CA) × 5 minutes (20.8% of rated capacity at depth of discharge). The discharge capacity was expressed as a percentage of the rated capacity. As the battery, a battery was used in which 20 cells, each of which had been subjected to the circular embossing press working shown in Example 1, were connected in series. As a comparative example, a similar test was performed on a battery that was not subjected to the embossing press processing of the conventional method. The charging was completed when the total voltage of the 20 cells reached 31.0 V, and the discharge cycle was started. The battery of the comparative example not subjected to the embossing press of the conventional method has a reduced battery capacity as the number of cycles increases, but the battery subjected to the embossing of the present invention maintains the battery capacity stably. is made of.
【０００８】[0008]
【発明の効果】以上のように本発明は、エンボスプレス
加工を施すことにより、急速充放電用途に適したアルカ
リ二次電池が得られるものであって、その工業的価値は
大きい。As described above, according to the present invention, an alkaline secondary battery suitable for rapid charge / discharge applications can be obtained by embossing press working, and its industrial value is great.
【図１】エンボスプレス加工前の電池の正面図である。FIG. 1 is a front view of a battery before embossing.
【図２】本発明のエンボスプレス加工中の側面図であ
る。FIG. 2 is a side view during embossing press processing of the present invention.
【図３】本発明のエンボスプレス加工後の電池の正面図
である。FIG. 3 is a front view of the battery after embossing according to the present invention.
【図４】本発明電池の充電電圧分布を示す図である。FIG. 4 is a diagram showing a charging voltage distribution of the battery of the present invention.
【図５】比較例の電池の充電電圧分布を示す図である。FIG. 5 is a diagram showing a charging voltage distribution of a battery of a comparative example.
【図６】本発明電池の充電受入れ量の分布を示す図であ
る。FIG. 6 is a diagram showing a distribution of a charge acceptance amount of the battery of the present invention.
【図７】比較例の電池の充電受入れ量の分布を示す図で
ある。FIG. 7 is a diagram showing a distribution of a charge acceptance amount of a battery of a comparative example.
【図８】本発明と比較例の電池のサイクル数と放電容量
との関係図である。FIG. 8 is a diagram showing the relationship between the number of cycles and the discharge capacity of the batteries of the present invention and the comparative example.
１ 端子 ２ 平板電極に平行な電槽面 ３ 押し型 ４ 円形凹部 1 Terminal 2 Battery case surface parallel to plate electrode 3 Push type 4 Circular recess
Claims (1)
群を、金属製の角形電槽に挿入してなるアルカリ二次電
池であって、前記平板電極に平行な電槽面に複数の円形
の凹みを設けたことを特徴とするアルカリ二次電池。An alkaline secondary battery in which an electrode group in which a flat plate electrode and a separator are laminated is inserted into a rectangular battery case made of metal, and a plurality of circular shapes are provided on a battery case surface parallel to the flat plate electrode.
An alkaline secondary battery characterized by having a concave portion .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10738196A JP3301309B2 (en) | 1996-04-26 | 1996-04-26 | Alkaline secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10738196A JP3301309B2 (en) | 1996-04-26 | 1996-04-26 | Alkaline secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09293488A JPH09293488A (en) | 1997-11-11 |
| JP3301309B2 true JP3301309B2 (en) | 2002-07-15 |
Family
ID=14457685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10738196A Expired - Fee Related JP3301309B2 (en) | 1996-04-26 | 1996-04-26 | Alkaline secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3301309B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6248472B1 (en) | 1998-12-11 | 2001-06-19 | Eveready Battery Company, Inc. | Electrochemical cell formed with can having walls extending radially inward |
| KR100490538B1 (en) * | 2002-09-03 | 2005-05-17 | 삼성에스디아이 주식회사 | Battery |
| KR20210051164A (en) | 2019-10-30 | 2021-05-10 | 주식회사 엘지화학 | Pressing jig and method for manufacturing secondary battery using the same |
-
1996
- 1996-04-26 JP JP10738196A patent/JP3301309B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09293488A (en) | 1997-11-11 |
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