WO2015145800A1 - 鉛蓄電池及び鉛蓄電池用の電極集電体 - Google Patents
鉛蓄電池及び鉛蓄電池用の電極集電体 Download PDFInfo
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- WO2015145800A1 WO2015145800A1 PCT/JP2014/071775 JP2014071775W WO2015145800A1 WO 2015145800 A1 WO2015145800 A1 WO 2015145800A1 JP 2014071775 W JP2014071775 W JP 2014071775W WO 2015145800 A1 WO2015145800 A1 WO 2015145800A1
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- Prior art keywords
- lead alloy
- lead
- mass
- current collector
- maximum
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- 210000000352 storage cell Anatomy 0.000 title abstract 3
- 229910000978 Pb alloy Inorganic materials 0.000 claims abstract description 92
- 238000005096 rolling process Methods 0.000 claims abstract description 62
- 239000012535 impurity Substances 0.000 claims abstract description 22
- 238000003860 storage Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 8
- 239000007774 positive electrode material Substances 0.000 claims description 6
- 229910052738 indium Inorganic materials 0.000 claims description 5
- 239000007773 negative electrode material Substances 0.000 claims description 4
- 229910052718 tin Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 abstract description 16
- 239000003792 electrolyte Substances 0.000 abstract description 3
- 239000013543 active substance Substances 0.000 abstract 2
- 230000000052 comparative effect Effects 0.000 description 19
- 230000007797 corrosion Effects 0.000 description 13
- 238000005260 corrosion Methods 0.000 description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 230000007423 decrease Effects 0.000 description 7
- 239000011575 calcium Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 4
- 238000001953 recrystallisation Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910014474 Ca-Sn Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002003 electrode paste Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/12—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of lead or alloys based thereon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/68—Selection of materials for use in lead-acid accumulators
- H01M4/685—Lead alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/72—Grids
- H01M4/74—Meshes or woven material; Expanded metal
-
- 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
- H01M10/06—Lead-acid 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
Definitions
- the present invention relates to a lead storage battery in which an electrode plate group in which a negative electrode plate and a positive electrode plate are laminated via a separator is housed in a battery case together with an electrolytic solution, and an electrode current collector thereof.
- Patent Document 1 discloses a technique for manufacturing an electrode grid (electrode current collector) for a lead storage battery using a lead alloy (lead sheet of a slab casting) containing calcium and tin. Has been. In this technique, a rolling material obtained by rolling a lead alloy is used for the purpose of increasing the lattice density of the current collector.
- Patent Document 2 discloses a grid for a lead storage battery (current collector) made of a lead alloy containing Bi (bismuth) as an impurity in a Pb—Ca—Sn alloy. It is disclosed. Since the lead alloy containing impurities has a low raw material cost, if such a raw material is used to manufacture a grid for a lead storage battery, the manufacturing cost of the lead storage battery can be kept low.
- An object of the present invention is to provide a lead storage battery and an electrode collection for the lead storage battery that can improve the battery performance by increasing the rolling reduction even when the current collector is manufactured using a lead alloy containing Bi. It is to provide an electric body.
- Another object of the present invention is to produce a current collector using a lead alloy containing Bi, and to reduce the durability of the electrode current collector even when the rolling reduction ratio is increased, It is providing the electrode electrical power collector for lead acid batteries.
- the lead storage battery to be improved by the present invention is an electrode plate group in which a negative electrode plate holding a negative electrode active material on a negative electrode current collector and a positive electrode plate holding a positive electrode active material on a positive electrode current collector are stacked via a separator.
- a lead storage battery configured to be housed in a battery case together with an electrolytic solution.
- the positive electrode current collector constituting the lead storage battery of the present invention is made of a lead alloy.
- This lead alloy contains Ca: 0.05 to 0.1 mass%, Sn: 1.2 to 2.2 mass%, and In: 0.002 to 0.03 mass%, and at least Bi as inevitable impurities. : It has 0.001 thru
- This lead alloy is subjected to rolling at a rolling reduction (working degree) of 80 to 97.5%.
- the occurrence of intergranular corrosion can be suppressed even when rolling is performed at an extremely high reduction ratio (80 to 97.5% reduction ratio). It is possible to reduce the deterioration of the durability of the electric body. In other words, even when a lead alloy containing impurities such as Bi is used, the rolling process can be performed at an extremely high reduction rate (80 to 97.5% reduction rate) that has been impossible in the past. For this reason, the grid density of the current collector can be made higher than before, so that battery performance (cycle life, etc.) can be improved.
- the strength improvement (effect of suppressing the occurrence of intergranular corrosion) is not impaired.
- the ductility and malleability (workability) of lead alloys can be improved. That is, when In and Ag are contained together in a lead alloy containing Bi, a positive electrode current collector having both high durability and good workability can be obtained.
- the rolling process for the lead alloy is preferably when the rolling process is further performed after reaching the maximum strength with respect to the maximum elongation of the lead alloy when the lead alloy reaches the maximum strength (relative value of tensile strength). Until the maximum elongation of the lead alloy reaches 150% or more.
- the rate is 150% or more means that when the lead alloy is rolled, the maximum strength (relative value of tensile strength) is first reached, compared to the elongation of the lead alloy compared to before rolling.
- the elongation of the lead alloy is 150% when further rolling is performed after reaching the maximum strength.
- the lead alloy used in the present invention can be further expanded.
- the lead alloy is hardened by work hardening, but lead recrystallization (recrystallization temperature is 0 to 60 ° C.) occurs, and the strength of the lead alloy is reduced.
- lead recrystallization recrystallization temperature is 0 to 60 ° C.
- the expanding process is preferably performed when the tensile strength of the lead alloy before the expanding process is 52 MPa or less. Needless to say, punching may be performed as an alternative processing method of the expanding process.
- the positive electrode current collector constituting a part of the above-described lead storage battery can constitute the electrode current collector for the lead storage battery of the present invention.
- the electrode electrical power collector for lead acid batteries of this invention is not limited to a positive electrode electrical power collector, It may target a negative electrode electrical power collector. Of course you can.
- the lead storage battery used in the embodiment of the present invention is not particularly shown, but by using a known technique, the negative electrode plate holding the negative electrode active material on the negative electrode current collector and the positive electrode active material held on the positive electrode current collector
- This is a lead storage battery in which an electrode plate group is formed by laminating a positive electrode plate with a separator interposed therebetween, and this electrode plate group is housed in a battery case together with an electrolytic solution.
- the electrode current collector used in the embodiment of the present invention is a positive electrode current collector constituting the positive electrode plate of the lead storage battery of this example. Various tests were conducted using the lead storage battery of this example.
- a positive electrode current collector used in the test of this example was produced as follows. First, a lead alloy slab having an alloy composition shown in Table 1 was prepared, rapidly cooled, and stored at 0 ° C. The lead alloy slab maintained at 0 ° C. was rolled to a predetermined thickness by a roller. Specifically, the degree of reduction (rolling rate) (%) is calculated from the thickness (20 mm) of the slab before rolling and the thickness (mm) of the slab after rolling, and the relationship between the rolling rate and workability. I investigated. The results are shown in Table 1.
- Comparative Example 1 substantially free of Bi (impurities) showed good workability even when the rolling reduction was increased.
- the comparative example 2 containing Bi (impurity) was the same component as the comparative example 1 except containing Bi, and when the rolling reduction became high, workability was unstable.
- the composition ratio of Ca, Sn, Ag, and In was adjusted as shown in Table 1.
- the workability was good when the rolling reduction ranged from 0 to 97.5% (Comparative Example). 3-10, Examples 1-7).
- the rolling reduction was 97.75%, the workability became unstable (Comparative Example 11), and when the rolling reduction was 98%, the machining was impossible (Comparative Example 12).
- a lead storage battery was manufactured as follows, and each test of battery characteristics was performed.
- a positive electrode active material paste was prepared by adding 10 parts of 40 mass% sulfuric acid and appropriate water to 90 parts of lead powder containing 75% lead monoxide. Then, after filling the positive electrode current collector with the positive electrode active material paste, the positive electrode current collector is left in an atmosphere at a temperature of 80 ° C. and a relative humidity of 98% or more for 6 hours, and then an atmosphere at a temperature of 60 ° C. and a relative humidity of 98% or more. And then left for 72 hours in an atmosphere at a temperature of 80 ° C. and a relative humidity of 40% to obtain a positive electrode plate.
- a separator was made using a glass paper having a density of 0.18 g / cm 3 , a width of 310 mm, a length of 210 mm, and a thickness of 1.4 mm.
- Electrode group Two positive electrode plates, three negative electrode plates, and the above separator were overlapped between the positive electrode plate and the negative electrode plate to produce an electrode plate group.
- the Sn content is 1.2 to When out of the range of 2.2% by mass and when the content of In is out of the range of 0.002 to 0.03% by mass, when at least one condition is satisfied (Comparative Examples 14 to 17, 19 to 22, 24 to 27, 29 to 32, 34 to 38, 40 to 59), the number of cycles is 100% (battery characteristics are maintained) or less than 100% (battery characteristics are deteriorated) ).
- the Ca content is in the range of 0.05 to 0.1% by mass, and the Sn content is 1.2 to
- the content is in the range of 2.2% by mass and the In content is in the range of 0.002 to 0.03% by mass (Examples 8 to 38)
- the number of cycles exceeds 100% in all cases. (Battery characteristics improved).
- Corrosion elongation identifies the four corner points of a rectangular current collector and the midpoint of each of the four sides, and the distance between each side of the current collector (four distances) and the distance between the opposing middle points ( Two distances).
- the maximum strength was 160 or more when a lead alloy substantially free of Bi as an impurity was used (Comparative Examples 23, 28, 33, and 39). Further, among the cases where a lead alloy substantially containing Bi as an impurity was used, the maximum strengths of Comparative Examples 14 to 17 and 19 to 22 (the composition content was outside the scope of the present invention) were both lower than 160. In contrast, the maximum strengths of Examples 8 to 38 (with composition contained within the scope of the present invention) all exceeded 160.
- the lead alloy composition with good corrosion elongation (creep durability), cycle life (battery characteristics), workability and maximum strength is Ca: 0.05 to 0.1. Wt%, Sn: 1.2 to 2.2 wt%, and In: 0.002 to 0.03 wt%, and at least Bi: 0.001 to 0.04 wt% as unavoidable impurities,
- the component composition was such that the balance was Pb (Examples 8 to 38).
- ductility and malleability (workability) are very good, and tensile strength (maximum strength) is also good. It turns out that there is.
- the workability was evaluated as ⁇ when it was good, ⁇ when it was unstable, and ⁇ when it was not workable.
- the lead alloy used in the present embodiment is further subjected to an expanding process (however, the tensile strength of the lead alloy before the expanding process is 52 MPa).
- the lead alloy having the above component composition and subjected to the rolling process at a very high rolling reduction is subject to recrystallization of the lead alloy although work hardening occurs even if the expansion process is performed. Since it becomes difficult to occur, the strength reduction of the current collector can be prevented.
- Examples 1 to 38 a lead alloy having a Bi content of 50 ppm was used, but as shown in Table 4, the Bi content of the lead alloy was in the range of 0.001 to 0.04 mass% (10 to 400 ppm).
- the lead alloys described in Examples 1 to 39 Examples 39 to 44
- Bi is not substantially included (Comparative Examples 60 and 62)
- the number of cycles (battery life) is maintained as in Comparative Examples 13, 18, 23, 28, 33, and 39 in Tables 2 and 3.
- the Bi content exceeds 400 ppm, the maximum strength decreases (the maximum strength is less than 160), and the cycle number decreases (the cycle number is less than 100).
- the present invention is not limited to these embodiments and experimental examples.
- a positive electrode current collector is used in this example.
- the negative electrode current collector may of course be used. That is, the dimensions, materials, shapes, and the like of the members described in the above-described embodiments and experimental examples can be changed based on the technical idea of the present invention unless otherwise specified.
- Ca 0.05 to 0.1% by mass
- Sn 1.2 to 2.2% by mass
- In 0.002 to 0.03% by mass
- Bi A lead alloy having a component composition containing 0.001 to 0.04% by mass and the balance being Pb is rolled at a rolling reduction of 80 to 97.5% to obtain a grid of the current collector
- the density can be increased and the strength of the current collector can be increased. Therefore, according to the present invention, battery performance (cycle life and the like) can be improved, and a decrease in battery durability can be reduced.
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Abstract
Description
本例の試験で用いる正極集電体を次のように作製した。まず、表1に示す合金組成を有する鉛合金のスラブを準備し、これを急冷して0℃で保管した。この0℃に維持された鉛合金のスラブを、ローラにより所定の厚さに圧延加工した。具体的には、圧延加工前のスラブの厚さ(20mm)と圧延加工後のスラブの厚さ(mm)から加工度(圧下率)(%)を算出して、圧下率と加工性の関係を調べた。その結果を表1に示す。
上記のように圧延加工して得た正極集電体を0℃で保管しておき、次いで60℃で200時間の時効硬化を行った後に引張強度を測定した。引張強度は、島津製作所製のオートグラフAGS-X5KNを用い、JIS-13Bに基づく試験片を10mm/minの速度で測定した。引張強度は、圧下率が0%場合(比較例3)の引張強度を100としたときの相対値(最大強度)として示した。その結果は、表1に示されている。
表1に示されるように、圧延加工性および引張強度から、圧下率は80~97.5%の範囲(実施例1~7)が良好であることが判った。実施例1~7では、鉛合金の引張強度が最大強度に到達したときの最大強度に対する、圧延加工時の最大強度の伸び率(表1の限界伸び)が150%以上のときに圧延加工が終了するように、鉛合金の圧延加工を行った。具体的には、まず52MPaで冷間圧延を行い、その後85MPaで熱処理を行った。このような条件で鉛合金の圧延加工を行うと、鉛合金が硬化する前に圧延加工が施され(結晶粒界へ歪みが集中するのを低減することができるため)、正極集電体の耐久性の低下を確実に小さくすることができる。
以下のように鉛蓄電池を製造し、電池特性の各試験を行った。
後述する表2及び表3に示す組成を有する長辺300mm(幅方向)、短辺200mm、厚さ2.5mmの複数種類の打ち抜き格子を正極集電体として用いた。
Pb-0.08質量%Ca-0.8質量%Sn合金からなる長辺300mm(幅方向)、短辺200mm、厚さ1.5mmのエキスパンド格子を負極集電体として用いた。
密度0.18g/cm3、幅310mm、長さ210mm、厚さ1.4mmのガラス紙状体を用いてセパレータを作った。
正極板2枚と負極板3枚と上記のセパレータを正極板と負極板の間に2枚重ねて極板群を作製した。
25質量%の希硫酸を使用して電槽内で化成を行い、仕上がりが35%になるように(希硫酸溶液)調整して電解液を作り、上記の極板群と電解液を組み合わせて鉛蓄電池を組み立てた。
次に、集電体の合金組成がサイクル寿命に与える影響を調べた。厚さが20mmのスラブを厚さが1.5mmになるまで圧延加工した表2及び表3に示す組成を有する正極集電体(圧下率92.5%)を用いて作製した鉛蓄電池について、高温環境でのサイクル寿命特性の試験を行った。具体的には、75℃の恒温槽の中で、充電電圧14.8V(ただし14.8Vに達する前の電流を25Aに制限した)、充電時間10分、25Aの定電流放電、放電時間4分とするサイクルを1サイクルとし、480サイクル毎に300Aの定電流放電を30秒行ったときの性能確認を行った。この試験では、30秒間の放電中に電圧が7.2V以下になる時点で電池が寿命を迎えたと判断した。サイクル寿命は、現行品(不純物としてBiを実質的に含まない鉛合金を用いた比較例23)のサイクル数を100としたときのサイクル数の相対比(%)にて示した(表2及び表3参照)。
上述のサイクル寿命特性の試験で寿命に達した電池から正極板を取り出し、集電体の腐食伸びを測定した。腐食伸びは、長方形の集電体の四隅の点と4辺の各辺の中点とを特定し、集電体の各辺の距離(4つの距離)と、対向する中点間の距離(2つの距離)とを測定する。サイクル寿命特定の試験前に測定した6つの距離をLa0~Lf0とし、サイクル寿命特性の試験後に測定した6つの距離をLat~Lftとしたときに、Σ(Lnt-Ln0)/n(%)を伸び率として示した結果は、上記の表2及び表3に示されている。腐食伸びは、伸び率が3.7未満ならクリープ耐久性が維持されたものと評価し、腐食伸びが3.7以上の場合はクリープ耐久性が維持できなかったものと評価した。
Claims (11)
- 負極活物質を負極集電体に保持した負極板と正極活物質を正極集電体に保持した正極板とをセパレータを介して積層した極板群を、電解液とともに電池ケース内に収納されてなる鉛蓄電池であって、
前記正極集電体は、Ca:0.05乃至0.1質量%、Sn:1.2乃至2.2質量%、In:0.002乃至0.03質量%及びAg:0.003乃至0.2質量%を含有し、不可避不純物として少なくともBi:0.001乃至0.04質量%を含有し、かつ残部がPbである鉛合金からなり、
前記鉛合金には、80乃至97.5%の圧下率で圧延加工が施されており、
前記圧延加工は、前記鉛合金が最大強度に到達した後の前記鉛合金の最大伸び率が150%以上になるまで行われ、
前記鉛合金には、さらにエキスパンド加工が施されており、
前記エキスパンド加工を施す前の前記鉛合金の引張強度が52MPa以下であることを特徴とする鉛蓄電池。 - 負極活物質を負極集電体に保持した負極板と正極活物質を正極集電体に保持した正極板とをセパレータを介して積層した極板群を、電解液とともに電池ケース内に収納されてなる鉛蓄電池であって、
前記正極集電体は、Ca:0.05乃至0.1質量%、Sn:1.2乃至2.2質量%、及びIn:0.002乃至0.03質量%を含有し、不可避不純物として少なくともBi:0.001乃至0.04質量%を含有し、かつ残部がPbである鉛合金からなり、
前記鉛合金には、80乃至97.5%の圧下率で圧延加工が施されていることを特徴とする鉛蓄電池。 - 前記鉛合金は、Ag:0.003乃至0.2質量%をさらに含有する請求項2に記載の鉛蓄電池。
- 前記鉛合金が最大強度に到達したときの前記鉛合金の最大伸び率に対して、前記最大強度に到達した後さらに前記圧延加工を施したときの前記鉛合金の最大伸び率が150%以上になるまで、前記圧延加工が行われていることを特徴とする請求項2または3に記載の鉛蓄電池。
- 前記鉛合金が最大強度に到達したときの前記鉛合金の最大伸び率に対して、前記最大強度に到達した後さらに前記圧延加工を施したときの前記鉛合金の最大伸び率が150%以上になるまで、前記圧延加工が行われており、
前記鉛合金には、さらにエキスパンド加工が施されている請求項2または3に記載の鉛蓄電池。 - 前記鉛合金が最大強度に到達したときの前記鉛合金の最大伸び率に対して、前記最大強度に到達した後さらに前記圧延加工を施したときの前記鉛合金の最大伸び率が150%以上になるまで、前記圧延加工が行われており、
前記鉛合金には、さらにエキスパンド加工が施されており、
前記エキスパンド加工を施す前の前記鉛合金の引張強度が52MPa以下である請求項2または3に記載の鉛蓄電池。 - Ca:0.05乃至0.1質量%、Sn:1.2乃至2.2質量%、及びIn:0.002乃至0.03質量%を含有し、不可避不純物として少なくともBi:0.001乃至0.04質量%を含有し、かつ残部がPbである鉛合金からなり、
前記鉛合金には、80乃至97.5%の圧下率で圧延加工が施されていることを特徴とする鉛蓄電池用の電極集電体。 - 前記鉛合金は、Ag:0.003乃至0.2質量%をさらに含有する請求項7に記載の鉛蓄電池用の電極集電体。
- 前記鉛合金が最大強度に到達したときの前記鉛合金の最大伸び率に対して、前記最大強度に到達した後さらに前記圧延加工を施したときの前記鉛合金の最大伸び率が150%以上になるまで、前記圧延加工が行われている請求項7または8に記載の鉛蓄電池用の電極集電体。
- 前記鉛合金が最大強度に到達したときの前記鉛合金の最大伸び率に対して、前記最大強度に到達した後さらに前記圧延加工を施したときの前記鉛合金の最大伸び率が150%以上になるまで、前記圧延加工が行われており、
前記鉛合金には、さらにエキスパンド加工が施されている請求項7または8に記載の鉛蓄電池用の電極集電体。 - 前記鉛合金が最大強度に到達したときの前記鉛合金の最大伸び率に対して、前記最大強度に到達した後さらに前記圧延加工を施したときの前記鉛合金の最大伸び率が150%以上になるまで、前記圧延加工が行われており、
前記鉛合金には、さらにエキスパンド加工が施されており、
前記エキスパンド加工を施す前の前記鉛合金の引張強度が52MPa以下である請求項7または8に記載の鉛蓄電池用の電極集電体。
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WO2022113731A1 (ja) * | 2020-11-30 | 2022-06-02 | 古河電気工業株式会社 | 鉛合金、鉛蓄電池用電極、鉛蓄電池、及び蓄電システム |
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CN110265733A (zh) * | 2019-06-14 | 2019-09-20 | 江西奥沃森新能源有限公司 | 一种新能源电动车电源控制铅酸蓄电池 |
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