JP2538054B2 - Sealed lead acid battery - Google Patents
Sealed lead acid batteryInfo
- Publication number
- JP2538054B2 JP2538054B2 JP1118925A JP11892589A JP2538054B2 JP 2538054 B2 JP2538054 B2 JP 2538054B2 JP 1118925 A JP1118925 A JP 1118925A JP 11892589 A JP11892589 A JP 11892589A JP 2538054 B2 JP2538054 B2 JP 2538054B2
- Authority
- JP
- Japan
- Prior art keywords
- separator
- electrode plate
- sub
- negative electrode
- acid battery
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/34—Gastight accumulators
- H01M10/342—Gastight lead accumulators
-
- 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
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、ポータブル電子機器用電源として用いられ
ている密閉式鉛蓄電池に関するものである。Description: TECHNICAL FIELD The present invention relates to a sealed lead acid battery used as a power source for portable electronic devices.
従来の技術 密閉式鉛蓄電池に関しては数々の提案が為されてきて
いる。その中でも正極板及び負極板を１枚のメインセパ
レータを介し対向させ、負極板あるいは正極板と負極板
の両方のそれぞれメインセパレータに対向しない面にサ
ブセパレータを配置する極板群構成については、活物質
利用率を向上させる目的や、極板群全体の電解液保持能
力を減少させることなく、正極板−負極板間の距離を少
なくすることにより、高率放電特性を向上させる目的で
用いられてきている。2. Description of the Related Art A number of proposals have been made regarding sealed lead acid batteries. Among them, the positive electrode plate and the negative electrode plate are opposed to each other with one main separator interposed therebetween, and the electrode plate group configuration in which the sub separators are arranged on the surfaces not facing the main separators of both the negative electrode plate and the positive electrode plate and the negative electrode plate is It has been used for the purpose of improving the material utilization rate and for improving the high rate discharge characteristics by reducing the distance between the positive electrode plate and the negative electrode plate without reducing the electrolyte holding capacity of the entire electrode plate group. ing.
発明が解決しようとする課題 前述の構成の極板群を有する密閉式鉛蓄電池について
は、負極板あるいは負極板と正極板の両方は全面電解液
を豊富に保持したセパレータで覆われているために活物
質利用率が向上する反面、充電時に正極板上で発生した
酸素ガスが負極板で拡散・吸収されにくいため、高率電
流が過充電を行った場合、負極板からは水素ガスが発生
し、これが正極板から発生した酸素ガスとともに安全弁
から電池系外に放出される。これにより電解液中の水分
が減少する結果、蓄電池容量が減少するという課題があ
った。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Regarding the sealed lead-acid battery having the above-configured electrode plate group, since the negative electrode plate or both the negative electrode plate and the positive electrode plate are covered with a separator holding abundant electrolyte solution, While the active material utilization rate improves, the oxygen gas generated on the positive electrode plate during charging is difficult to diffuse and be absorbed by the negative electrode plate, so when overcharging with a high rate current, hydrogen gas is generated from the negative electrode plate. This is released from the safety valve to the outside of the battery system together with the oxygen gas generated from the positive electrode plate. As a result, the water content in the electrolytic solution is reduced, and as a result, the storage battery capacity is reduced.
今一つの課題は、単セルの厚みを薄くするためには、
サブセパレータが非常に薄く、また電解液保持能力のよ
いバインダーを有しないセパレータ材質のものであった
ために、サブセパレータ自体の強度が弱く、極板群構成
工程においてサブセパレータが破損しやすいため手作業
に頼らざるを得ず、工程自動化の障害となっていた。Another issue is to reduce the thickness of the single cell.
Since the sub-separator is very thin and it is made of a separator material that does not have a binder with good electrolyte retention capacity, the strength of the sub-separator itself is weak and the sub-separator is easily damaged in the electrode plate assembly process I had to rely on the company, which was an obstacle to the automation of the process.
課題を解決するための手段 前述課題を解決するために、本発明は正極板及び負極
板がメインセパレータを介し対向し、さらに負極板ある
いは負極板と正極板の両方のメインセパレータと対向し
ない面にサブセパレータが対向し、このサブセパレータ
の一定圧力印加時のおける単位重量当たりの電解液保持
能力がメインセパレータの95〜60％であり、さらにメイ
ンセパレータとしてバインダーを有しないガラスマット
セパメータ，サブセバレータとしてアクリル樹脂をバイ
ンダーとして有するガラスマットセパレータを用いるこ
とを特徴とする密閉式鉛蓄電池である。Means for Solving the Problems In order to solve the above problems, the present invention has a positive electrode plate and a negative electrode plate facing each other through a main separator, further on the surface not facing the negative electrode plate or both the negative electrode plate and the positive electrode plate of the main separator. The sub-separator faces each other, and the electrolyte retention capacity per unit weight when a constant pressure is applied is 95 to 60% of the main separator. Furthermore, as a main separator, a glass mat separator without a binder, a sub-separator It is a sealed lead storage battery characterized by using a glass mat separator having an acrylic resin as a binder.
作用 本発明によれば、メインセパレータに比較して、電解
液を保持せず、空孔率の多いサブセパレータを用い、従
来構成の密閉式鉛蓄電池に比較して初期容量の減少を抑
制しつつ充電時に正極板から発生した酸素ガスがサブセ
パレータ中の空孔を通して効率よく負極板上に供給さ
れ、直ちに吸収されるために、特に高率過充電時の電解
中の水分減少が少なくなり、容量劣化を抑制するととも
に、サブセパレータはアクリル樹脂をバインダーとして
用いているために、サブセパレータ自体の強度も向上
し、従来手作業に頼っていた極板群構成工程の自動化が
可能となり、生産性が向上する。Effect According to the present invention, compared with the main separator, not holding the electrolytic solution, using a sub-separator with a high porosity, while suppressing the decrease in the initial capacity compared to the sealed lead-acid battery of the conventional configuration Oxygen gas generated from the positive electrode plate during charging is efficiently supplied to the negative electrode plate through the pores in the sub-separator and immediately absorbed, so that the decrease in water content during electrolysis at the time of high-rate overcharging is reduced and the capacity is reduced. In addition to suppressing deterioration, the sub-separator uses acrylic resin as a binder, so the strength of the sub-separator itself is also improved, making it possible to automate the electrode plate assembly process that has traditionally relied on manual work, thus improving productivity. improves.
実施例 以下、本発明の実施例を説明してゆく。Examples Hereinafter, examples of the present invention will be described.
第１図は本発明による密閉式鉛蓄電池の極板群を示す
図である。正極板１がメインセパレータ２を介して負極
板３と対向し、正極板１と負極板３のメインセパレータ
２に対向しない面にサブセパレータ４が配置されてい
る。この極板群構成自体、従来構成と何ら変わるもので
ない。ここでメインセパレータ２としてノンバインダー
のガラスマットセパレータを用い、サブセパレータ４と
してバインダーであるアクリル樹脂の添加量を変化さ
せ、一定圧力印加時における単位重量当たりの電解液保
持能力がA:100％,B:98％,C:95％,D:60％,E:50％,F:40％
の６種のガラスマットセパレータを用いた。ここでＡの
100％のものは従来例に他ならない。FIG. 1 is a view showing an electrode plate group of a sealed lead acid battery according to the present invention. The positive electrode plate 1 faces the negative electrode plate 3 via the main separator 2, and the sub-separator 4 is arranged on the surfaces of the positive electrode plate 1 and the negative electrode plate 3 that do not face the main separator 2. This electrode plate group structure itself is no different from the conventional structure. Here, a non-binder glass mat separator is used as the main separator 2, and the addition amount of the acrylic resin that is the binder is changed as the sub separator 4, so that the electrolyte holding capacity per unit weight when a constant pressure is applied is A: 100%, B: 98%, C: 95%, D: 60%, E: 50%, F: 40%
6 kinds of glass mat separators were used. Where A
100% is nothing but the conventional example.
これらのセパレータと同一極板、，同一電解液を用い
第１図に示したような極板群構成を有する密度式鉛蓄電
池を作製した。尚、電解液量はサブセパレータの電解液
保持能力に応じて変化させている。ここで従来例の電池
は容量0.7Ah（1MR）である。Using these separators, the same electrode plate, and the same electrolyte solution, a density lead acid battery having the electrode plate group structure as shown in FIG. 1 was produced. The amount of electrolytic solution is changed according to the electrolytic solution holding capacity of the sub separator. Here, the battery of the conventional example has a capacity of 0.7 Ah (1 MR).
これらの電池を単セルで0.85A定電流放電（終止電圧
1.75V）ののちに0.85A定電流で70分間充電（これは初期
容量に対して130％充電となる）を行う過充電サイクル
テストを20サイクル行い、容量変化と、試験前後の電池
の重量変化を求めた。これらの結果を第２図及び第３図
に示した。第２図によれば、用いたサブセパレータがC,
D,E,Fのものについては従来例（Ａ）に比較して過充電
サイクルテスト中の容量劣化は抑制される。しかしなが
らサブセパレータとしてＥおよびＦについては初期容量
が従来例に比較して低下している。第３図に示した過充
電サイクル前後の重量減では従来例Ａに比較してＣ〜Ｆ
のものについて低い量で抑えられている。これらの結果
よりサブサパレータとして一定圧力印加時の単位重量あ
たりの電解液保持能力がメインセパレータのそれに比較
して少ないものを用いた場合、メインセパレータに対し
て多く存在するサブセパレータ中の空孔を通して充電時
に正極板上で発生した酸素ガスが効率的に負極板上まで
拡散しそして負極板上で吸収される為に過充電時の電解
液中の水分減少が抑制され、過充電サイクル特性は向上
する。0.85A constant current discharge (cutoff voltage)
1.75V) followed by 0.85A constant current for 70 minutes for charging (this is 130% of the initial capacity) overcharge cycle test for 20 cycles, capacity change and battery weight change before and after the test I asked. The results are shown in FIGS. 2 and 3. According to FIG. 2, the used sub separator is C,
As for D, E, and F, capacity deterioration during the overcharge cycle test is suppressed as compared with the conventional example (A). However, the initial capacities of E and F as sub-separators are lower than those of the conventional example. In the weight reduction before and after the overcharge cycle shown in FIG.
It is suppressed at a low amount. From these results, when a sub-sparator with a smaller electrolyte holding capacity per unit weight when a constant pressure is applied is used as compared to that of the main separator, charging is performed through the holes in the sub-separator that are present in large numbers with respect to the main separator. Sometimes oxygen gas generated on the positive electrode plate is efficiently diffused to the negative electrode plate and is absorbed on the negative electrode plate, so that the decrease of water content in the electrolytic solution at the time of overcharge is suppressed and the overcharge cycle characteristic is improved. .
しかしサブセパレータの電解液保持能力を下げすぎる
と、正極板，負極板のサブセパレータに対向する部分の
活物質利用率が低下する結果、初期容量の低下を招くた
め余り実用的ではなく、サブセパレータの一定圧力印加
時の単位重量当たりの電解液保持能力はメインセパレー
タの95〜60％適当である。However, if the electrolyte holding capacity of the sub-separator is lowered too much, the active material utilization rate of the part of the positive electrode plate and the negative electrode plate facing the sub-separator will decrease, resulting in a decrease in the initial capacity. The electrolyte holding capacity per unit weight when a constant pressure is applied is 95 to 60% of that of the main separator.
さらにサブセパレータとしてアクリル樹脂をバインダ
ーとして用いたものを採用することによって、サブセパ
レータ自体の強度が増す結果、極板群構成工程における
サブセパレータ破損不良は減少し、従来不良が多量発生
するために困難であった設備の自動化が実現でき、生産
性も向上した。Furthermore, by adopting the one using acrylic resin as the binder as the sub separator, the strength of the sub separator itself is increased, resulting in a decrease in the sub separator separator failure in the electrode plate assembly process, which is difficult because a large number of conventional failures occur. It was possible to realize the automation of equipment, which was the same as before, and productivity was also improved.
発明の効果 これまで述べてきたように、サブセパレータとして、
メインセパレータよりも電解液保持能力の低いセパレー
タを一定圧力印加時の単位当たりの電解液保液能力をメ
インセパレータのそれの95〜60％とすることでアクリル
樹脂をバインダーとしたガラスマットセパレータを用い
ることにより、サブセパレータ中の空孔を通して充電時
に正極板より発生した酸素ガスが負極板上に効率的に拡
散し、さらに負極板上で吸収されるため、高率過充電の
蓄電池の電解液中の水分減少による容量劣化を抑制しつ
つ、従来例に比較して初期容量の低下を招くこともな
く、さらにアクリル樹脂をバインダーとして用いた結
果、サブセパレータ自体の強度も向上するため従来、手
作業のみに頼っていた極板群構成工程を自動化すること
が可能になり、本発明の工業的価値は大きい。Effects of the Invention As described above, as the sub separator,
Use a glass mat separator with an acrylic resin as a binder by setting the electrolyte retention capacity per unit when a constant pressure is applied to the electrolyte with a lower electrolyte retention capacity than the main separator to 95-60% of that of the main separator. Oxygen gas generated from the positive electrode plate during charging through the pores in the sub-separator efficiently diffuses on the negative electrode plate and is absorbed on the negative electrode plate. While suppressing the capacity deterioration due to the decrease of water content, without causing a decrease in the initial capacity compared to the conventional example, as a result of using an acrylic resin as a binder, the strength of the sub-separator itself is also improved. It becomes possible to automate the electrode plate assembly process, which relies solely on this, and the industrial value of the present invention is great.
第１図は本発明及び従来例による密閉式鉛蓄電池の極板
群を示した断面図、第２図は本発明及び従来例による密
閉式鉛蓄電池の過充電サイクル寿命特性図、第３図は過
充電サイクル試験後の電池の重量減を示す図である。FIG. 1 is a sectional view showing an electrode plate group of a sealed lead acid battery according to the present invention and a conventional example, FIG. 2 is an overcharge cycle life characteristic diagram of a sealed lead acid battery according to the present invention and a conventional example, and FIG. It is a figure which shows the weight reduction of the battery after an overcharge cycle test.
Claims (3)
対向し、さらに負極板あるいは負極板と正極板の両方の
前記メインセパレータと対向しない面にサブセパレータ
が対向している構成を有する密閉式鉛蓄電池系におい
て、サブセパレータの一定圧力印加時における単位重量
あたりの電解液保持能力が前記メインセパレータのそれ
の60〜95％であることを特徴とする密閉式鉛蓄電池。1. A hermetically sealed structure having a structure in which a positive electrode plate and a negative electrode plate are opposed to each other with a main separator interposed therebetween, and a sub separator is opposed to a surface of the negative electrode plate or both of the negative electrode plate and the positive electrode plate which is not opposed to the main separator. A lead-acid battery system, wherein the sub-separator has an electrolyte retention capacity per unit weight when a constant pressure is applied to 60 to 95% of that of the main separator.
ないガラスマットセパレータ，サブセパレータとしてバ
インダーを有するガラスマットセパレータを用いたこと
を特徴とする特許請求の範囲第１項記載の密閉式鉛蓄電
池。2. The sealed lead-acid battery according to claim 1, wherein a glass mat separator having no binder is used as the main separator and a glass mat separator having a binder is used as the sub separator.
ル樹脂を用いることを特徴とする特許請求の範囲第１項
又は第２項記載の密閉式鉛蓄電池。3. A sealed lead acid battery according to claim 1, wherein an acrylic resin is used as a binder of the sub separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1118925A JP2538054B2 (en) | 1989-05-12 | 1989-05-12 | Sealed lead acid battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1118925A JP2538054B2 (en) | 1989-05-12 | 1989-05-12 | Sealed lead acid battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02299172A JPH02299172A (en) | 1990-12-11 |
| JP2538054B2 true JP2538054B2 (en) | 1996-09-25 |
Family
ID=14748595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1118925A Expired - Fee Related JP2538054B2 (en) | 1989-05-12 | 1989-05-12 | Sealed lead acid battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2538054B2 (en) |
-
1989
- 1989-05-12 JP JP1118925A patent/JP2538054B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02299172A (en) | 1990-12-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |