JPH0346950B2 - - Google Patents
Info
- Publication number
- JPH0346950B2 JPH0346950B2 JP58045801A JP4580183A JPH0346950B2 JP H0346950 B2 JPH0346950 B2 JP H0346950B2 JP 58045801 A JP58045801 A JP 58045801A JP 4580183 A JP4580183 A JP 4580183A JP H0346950 B2 JPH0346950 B2 JP H0346950B2
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- binder
- electrode plate
- amount
- nonaqueous electrolyte
- 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 - Lifetime
Links
- 239000000203 mixture Substances 0.000 claims description 30
- 239000011230 binding agent Substances 0.000 claims description 22
- 239000011255 nonaqueous electrolyte Substances 0.000 claims description 10
- 239000006258 conductive agent Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000007774 positive electrode material Substances 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 1
- 229910052783 alkali metal Inorganic materials 0.000 claims 1
- 150000001340 alkali metals Chemical class 0.000 claims 1
- 229910052700 potassium Inorganic materials 0.000 claims 1
- 239000011591 potassium Substances 0.000 claims 1
- 239000011149 active material Substances 0.000 description 6
- 238000005336 cracking Methods 0.000 description 4
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910021594 Copper(II) fluoride Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- GWFAVIIMQDUCRA-UHFFFAOYSA-L copper(ii) fluoride Chemical compound [F-].[F-].[Cu+2] GWFAVIIMQDUCRA-UHFFFAOYSA-L 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229910001923 silver oxide Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
- H01M6/16—Cells with non-aqueous electrolyte with organic electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/04—Cells with aqueous electrolyte
- H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
- H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Primary Cells (AREA)
Description
【発明の詳細な説明】
この発明は電池性能および容量の劣化を防止す
ることができる円筒形非水電解液電池に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cylindrical nonaqueous electrolyte battery that can prevent deterioration of battery performance and capacity.
従来、円筒形非水電解液電池は正極活物質、導
電剤および結着剤を混合した同一の正極合剤を集
電体の両面に均等に付着させて帯状正極板とし、
この帯状正極板と負極板との間にセパレータを介
在させて巻回し渦巻電極群を形成した後、渦巻電
極群と非水電解液を電池容器に充填した。 Conventionally, cylindrical non-aqueous electrolyte batteries are made by uniformly depositing the same positive electrode mix, which is a mixture of a positive electrode active material, a conductive agent, and a binder, on both sides of a current collector to form a strip-shaped positive electrode plate.
A separator was interposed between the strip-shaped positive electrode plate and the negative electrode plate to form a wound spiral electrode group, and then the spiral electrode group and the non-aqueous electrolyte were filled into a battery container.
上記、帯状正極板は集電体の両面に結着剤を同
量混合した正極合剤を均等に付着してあるため、
渦巻状電極群を形成する際、巻回中心部において
内測に位置する正極合剤に大きな圧縮力が加わる
とともに、外測に位置する正極合剤に大きな張力
が加わる。 The above strip-shaped positive electrode plate has a positive electrode mixture mixed with the same amount of binder evenly adhered to both sides of the current collector.
When forming a spiral electrode group, a large compressive force is applied to the positive electrode mixture located in the inner part of the winding center, and a large tension is applied to the positive electrode mixture located in the outer part.
このため、外測の正極合剤にひび割れが入つた
り、また正極合剤が剥離し易くなるため、電気的
接解不良による放電利用率が低下するとともに、
剥離した正極合剤が負極板に接触して内部短絡の
原因となる。また、正極合剤のひび割れや剥離を
防止するために、結着剤の混合量を増やすと、そ
の分活物質成分および導電剤の容量が減少して利
用率が低下して電池容量が小さくなつてしまう欠
点などがあつた。 For this reason, cracks appear in the externally measured positive electrode mixture, and the positive electrode mixture tends to peel off, which reduces the discharge utilization rate due to poor electrical connection.
The peeled positive electrode mixture comes into contact with the negative electrode plate, causing an internal short circuit. In addition, if the amount of binder mixed is increased to prevent cracking or peeling of the positive electrode mixture, the capacity of the active material component and conductive agent will decrease, resulting in a decrease in utilization rate and a decrease in battery capacity. There were some drawbacks.
この発明は上記の問題点を解決するためになさ
れたもので、集電体の外測に付着される正極合剤
に対して結着剤の量を内側に付着される正極合剤
の量に比べて多くすることにより、帯状正極板を
巻回する際張力によるひび割れや剥離を少なくし
電気的接触不良または剥離合剤による内部短絡を
防止することができる円筒形非水電解液電池を提
供しようとするものである。 This invention was made to solve the above problems, and the amount of the binder is adjusted to the amount of the positive electrode mixture attached to the inside of the current collector with respect to the positive electrode mixture attached to the outside of the current collector. It is an object of the present invention to provide a cylindrical non-aqueous electrolyte battery that can reduce cracking and peeling due to tension when winding a strip positive electrode plate and prevent internal short circuits due to poor electrical contact or peeling mixture by increasing the number of positive electrode plates compared to each other. That is.
以下、図面を参照してこの考案の一実施例を説
明する。 An embodiment of this invention will be described below with reference to the drawings.
第１図において１は帯状正極板で、この正極板
１はエキスパンドメタル、パンチドメタル、焼結
金網などの集電体の両面に活物質、導電剤、結合
剤を混合した正極合剤を付着して構成される。正
極合剤は二酸化マンガン、酸化銀などの酸化物や
フツ化炭素、フツ化銅などのフツ化物を活物質と
し、これに導電剤、結着剤を混入して作られる。 In Figure 1, 1 is a strip-shaped positive electrode plate, and this positive electrode plate 1 has a positive electrode mixture containing an active material, a conductive agent, and a binder attached to both sides of a current collector such as expanded metal, punched metal, or sintered wire mesh. It is composed of The positive electrode mixture is made by using oxides such as manganese dioxide and silver oxide, and fluorides such as carbon fluoride and copper fluoride as active materials, and mixing them with a conductive agent and a binder.
このとき、正極板１の一方の面上に付着される
正極合剤は他方の面に付着される正極合剤に対し
て結合剤の量を多く混入する。 At this time, the positive electrode mixture deposited on one surface of the positive electrode plate 1 contains a larger amount of binder than the positive electrode mixture deposited on the other surface.
この正極板１の上にポリプロピレンなどの不織
布からなるセパレータ２を介在させてリチウム、
ナトリウム、マグネシウム等の軽金属よりなる負
極板３を積層する。そして正極板１、セパレータ
２、負極板３よりなる積層体の一方の平面にセパ
レータ２′を積層し結合剤の配合量の少ない面を
内側にして巻回することにより渦巻状電極群を形
成する。この電極群を電池容器４に挿入し、プロ
ピレンカーボネート、ジメトキシエタン、γ−ブ
チルラクトンなどの電解液を予め脱水した無機塩
を溶解した非水液系電解液を注液する。 A separator 2 made of a nonwoven fabric such as polypropylene is interposed on the positive electrode plate 1 to
A negative electrode plate 3 made of a light metal such as sodium or magnesium is laminated. Then, a separator 2' is laminated on one plane of the laminate consisting of the positive electrode plate 1, separator 2, and negative electrode plate 3, and the spiral electrode group is formed by winding the separator 2' with the side containing the least amount of binder inside. . This electrode group is inserted into the battery container 4, and a non-aqueous electrolytic solution in which an inorganic salt obtained by dehydrating an electrolytic solution such as propylene carbonate, dimethoxyethane, or γ-butyl lactone in advance is dissolved is poured into the battery container 4.
最後に、正極端子５を備えた封口板６を電池容
器４の開口部より挿入し、この開口部を内側にカ
ーリングして封口する。 Finally, the sealing plate 6 provided with the positive electrode terminal 5 is inserted into the opening of the battery container 4, and the opening is curled inward to seal it.
このように、正極板１の渦巻電極群の中心に対
して外側に位置する面側の正極合剤に活物質と導
電剤を結着させる結着剤を多目に混入させること
により、粘性抵抗が大きくなり、特に巻回半径の
小さな中心部における大きな張力に対して強くな
るため、ひび割や剥離が少なくなり、電気的接触
不良、または内部短絡による電池性能の劣化を防
止することができる。 In this way, by mixing a large amount of the binder that binds the active material and the conductive agent into the positive electrode mixture on the surface side located outside of the center of the spiral electrode group of the positive electrode plate 1, the viscous resistance can be reduced. This increases the resistance to large tensions, especially at the center where the winding radius is small, which reduces cracking and peeling, and prevents deterioration of battery performance due to poor electrical contact or internal short circuits.
ちなみに、正極活物質として二酸化マンガンを
用い、これに導電剤としてグラフアイトと結着剤
としてポリテトラフロロエタンを混合して正極合
剤を作り、これを集電体であるエキスパンドメタ
ルの両側に付着させて正極板とする。 By the way, we used manganese dioxide as the positive electrode active material, mixed it with graphite as a conductive agent, and polytetrafluoroethane as a binder to create a positive electrode mixture, which was then attached to both sides of the expanded metal that is the current collector. This is used as a positive electrode plate.
負極活物質にリチウムを用い、電解液にはプロ
ピレンカーボネートにジメトキシエタンを１：１
の体積比で混合し１モルの過塩素酸リチウムを溶
解させたものを用いる。 Lithium is used as the negative electrode active material, and the electrolyte is propylene carbonate and dimethoxyethane in a ratio of 1:1.
A solution containing 1 mole of lithium perchlorate is used.
そして、本発明品Ａは内側に巻回される面側の
正極合剤の結着剤を2ωt％に渦巻電極群の中心に
対して外側に巻回される面側の正極合剤の結着剤
を10ωt％とし、従来品Ｂは内外両面の正極合剤
の結着剤の量を6ωt％と、また従来品Ｃは内外と
もに結着剤の量を10ωt％として、径16.5mm高さ33
mmの2/3Ａ型電池を製造する。この電池を常温で
１ケ月間貯蔵した後で、60Ωの負荷抵抗により放
電特性をとつたところ第２図に示す定負荷放電曲
線が得られた。 In the product A of the present invention, the binder of the positive electrode mixture on the side wound on the inside is set to 2ωt%, and the binding agent of the positive electrode mixture on the side wound on the outside with respect to the center of the spiral electrode group is set to 2ωt%. Conventional product B has a binder amount of 6ωt% in the positive electrode mixture on both the inner and outer surfaces, and conventional product C has a binder amount of 10ωt% on both the inside and outside, and has a diameter of 16.5 mm and a height of 33 mm.
Manufacture 2/3A type batteries of mm. After storing this battery at room temperature for one month, the discharge characteristics were measured using a load resistance of 60Ω, and a constant load discharge curve shown in FIG. 2 was obtained.
この結果、従来品Ｂは本発明品Ａに比べて20％
程度容量が少なくなつている。また従来品Ｃは本
発明品Ａに比べて25％程度容量が少なくなつてい
る。 As a result, conventional product B was 20% lower than inventive product A.
capacity is decreasing. Furthermore, the capacity of conventional product C is about 25% smaller than that of product A of the present invention.
データを収録後、各電池を分解して正極板の状
態を調べたみた結果、本発明品Ａと従来品Ｃの場
合には正極合剤にはひび割れや剥離が見うけられ
なかつたが、従来品Ｂの場合には外側合剤が集電
体から剥離していることがわかつた。 After recording the data, we disassembled each battery and examined the condition of the positive electrode plate. As a result, in the case of the present invention product A and the conventional product C, no cracks or peeling were observed in the positive electrode mix, but compared to the conventional product In the case of product B, it was found that the outer mixture had peeled off from the current collector.
このことから、本発明品Ａと従来品Ｂは電池容
器に充填されている正極活物質の量が等しいにも
かかわらず、従来品Ｂの容量が本発明品Ａに比べ
て小さくなつている。これは従来品Ｂの正極合剤
の剥離による電気的接触不良によるものである。 From this, although the present invention product A and the conventional product B have the same amount of positive electrode active material filled in the battery container, the capacity of the conventional product B is smaller than that of the present invention product A. This is due to poor electrical contact due to peeling of the positive electrode mixture in Conventional Product B.
また、従来品Ｃの場合は本発明品Ａおよび従来
品Ｂに比べて結着剤の量が多くなつた分だけ正極
活物質の量が少なくなるため、容量が小さくなる
とともに内部抵抗が高くなるためである。 In addition, in the case of conventional product C, compared to product A of the present invention and conventional product B, the amount of the positive electrode active material is reduced due to the increased amount of binder, resulting in a decrease in capacity and a high internal resistance. It's for a reason.
以上のことから、本発明品Ａ正極板の渦巻電極
群の中心に対して外側の結着剤の量を内側の結着
剤の量より多くすることにより、活物質量を減少
させずに合剤の剥離などによる電気的接触不良お
よび合剤の落下などによる内部短絡をなくし電池
性能および容量の劣化を防止するものである。 From the above, it was found that by increasing the amount of binder on the outside of the center of the spiral electrode group of the positive electrode plate of the present invention A than the amount of binder on the inside, the amount of active material can be combined without decreasing the amount of active material. This prevents deterioration of battery performance and capacity by eliminating poor electrical contact due to peeling of the agent and internal short circuits due to falling of the mixture.
以上述べたようにこの発明によれば、集電体の
外側に付着される正極合剤の結着剤の量を内側に
付着される正極合剤の結着剤の量に比べて多くす
ることにより、帯状正極板を巻回する際張力によ
るひび割れや剥離を少なくして電気的接触不良ま
たは剥離合剤による内部短絡を防止することがで
きる円筒形非水電解液電池を提供することができ
る。 As described above, according to the present invention, the amount of the binder of the positive electrode mixture attached to the outside of the current collector is made larger than the amount of the binder of the positive electrode mixture attached to the inside. Accordingly, it is possible to provide a cylindrical non-aqueous electrolyte battery that can reduce cracking and peeling due to tension when winding a strip-shaped positive electrode plate, thereby preventing poor electrical contact or internal short circuits due to peeling mixture.
なお、この発明は上記実施例に限定されるもの
ではなく、要旨を変更しない範囲において種々変
形して実施することができる。 Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without changing the gist.
第１図はこの発明の一実施例の構成を示す縦断
面図、第２図は同実施例と従来品の定負荷放電曲
線図である。
１……帯状正極板、２，２′……セパレータ、
３……負極板、４……電池容器、５……正極端
子、６……封口板。
FIG. 1 is a longitudinal sectional view showing the structure of an embodiment of the present invention, and FIG. 2 is a constant load discharge curve diagram of the embodiment and a conventional product. 1... Strip positive electrode plate, 2, 2'... Separator,
3... Negative electrode plate, 4... Battery container, 5... Positive electrode terminal, 6... Sealing plate.
Claims (1)
着剤を成分とする正極合剤を付着させて形成した
正極板とアルカリ金属からなる負極板との間にセ
パレータを介在させて渦巻き状に巻回した渦巻状
電極電極群および非水液系電解液を電池容器に充
填した円筒形非水電解液電池において、上記正極
板の渦巻状電極群の中心に対して外側に位置する
面側の正極合剤の結着剤配合量を内側に位置する
面側の結着剤配合量より多くすることを特徴とす
る円筒形非水電解液電池。 ２ 上記集電体はエキスパンドメタル、パンチド
メタルまたは焼結金網等を用いることを特徴とす
る特許請求の範囲第１項記載の円筒形非水電解液
電池。 ３ 上記負極板はリチウム、ナトリウムまたはカ
リウム等の軽金属よりなることを特徴とする特許
請求の範囲第１項記載の円筒形非水電解液電池。[Claims] 1. A separator is provided between a positive electrode plate formed by adhering a positive electrode mixture containing a positive electrode active material, a conductive agent, and a binder to both sides of a current collector, and a negative electrode plate made of an alkali metal. In a cylindrical nonaqueous electrolyte battery in which a battery container is filled with a spirally wound electrode group and a nonaqueous electrolyte with a A cylindrical non-aqueous electrolyte battery characterized in that the amount of binder compounded in the positive electrode mixture on the surface side located on the outside is greater than the amount of binder compounded on the surface side located on the inside. 2. The cylindrical nonaqueous electrolyte battery according to claim 1, wherein the current collector is made of expanded metal, punched metal, sintered wire mesh, or the like. 3. The cylindrical nonaqueous electrolyte battery according to claim 1, wherein the negative electrode plate is made of a light metal such as lithium, sodium, or potassium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4580183A JPS59194363A (en) | 1983-03-18 | 1983-03-18 | Cylindrical nonaqueous electrolyte battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4580183A JPS59194363A (en) | 1983-03-18 | 1983-03-18 | Cylindrical nonaqueous electrolyte battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59194363A JPS59194363A (en) | 1984-11-05 |
| JPH0346950B2 true JPH0346950B2 (en) | 1991-07-17 |
Family
ID=12729368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4580183A Granted JPS59194363A (en) | 1983-03-18 | 1983-03-18 | Cylindrical nonaqueous electrolyte battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59194363A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5683834A (en) * | 1994-09-07 | 1997-11-04 | Fuji Photo Film Co., Ltd. | Nonaqueous secondary battery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5699970A (en) * | 1979-12-11 | 1981-08-11 | Hitachi Ltd | Battery with volute electrode |
-
1983
- 1983-03-18 JP JP4580183A patent/JPS59194363A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5699970A (en) * | 1979-12-11 | 1981-08-11 | Hitachi Ltd | Battery with volute electrode |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59194363A (en) | 1984-11-05 |
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