WO2005045956A1 - 鉛蓄電池およびその製造方法 - Google Patents
鉛蓄電池およびその製造方法 Download PDFInfo
- Publication number
- WO2005045956A1 WO2005045956A1 PCT/JP2004/016712 JP2004016712W WO2005045956A1 WO 2005045956 A1 WO2005045956 A1 WO 2005045956A1 JP 2004016712 W JP2004016712 W JP 2004016712W WO 2005045956 A1 WO2005045956 A1 WO 2005045956A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- strap
- electrode plate
- lead
- boundary
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C11/00—Alloys based on lead
- C22C11/08—Alloys based on lead with antimony or bismuth as the next major constituent
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
- H01M50/541—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges for lead-acid accumulators
-
- 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
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- 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 and a method for manufacturing the same.
- an electrode plate group is usually formed by laminating or winding a positive electrode plate and a negative electrode plate via a separator. Thereafter, the lugs of the same polarity are joined together by welding, so that the lugs are electrically connected.
- the current collector formed during this bonding is called a strap.
- the joining method there are a cast 'on' strap method (Caston Strap, abbreviated as COS) and a burner method.
- COS Cast 'on' strap method
- molten lead or a molten lead alloy is poured into a rectangular shape having a strap shape, and a bundle of electrode lugs is inverted and immersed in the rectangular shape.
- the burner method is a method in which the upper ends of the plate ears are melted with a gas burner and at the same time, additional lead is supplied while being melted, and the plate ears are joined together by welding. The latter method has been applied to lead-acid batteries of low production because of its simple manufacturing equipment and easy application to various types.
- FIG. 3 is a perspective view of an essential part showing an example of forming a strap by joining electrode plate ears by welding by a burner method.
- 1 is an electrode plate group
- 2 is an electrode plate ear
- 3 is a completed strap
- 4 is a welding aid A having a comb-shaped notch (usually referred to as a comb shape. Description)
- 41 is a comb-like cut portion provided in the comb shape
- 6 is a burner
- 7 is an additional lead.
- the shape of the comb 4 is omitted for the sake of simplicity, but the actual comb 4 forms a container into which the lead 7 serving as the strap 3 is poured.
- the shape is shown in Fig. 5 (a), (b) and (c).
- the electrode plate ears 2 are partially melted by the burner 6, and at the same time, the additional lead 7 is supplied while being melted to form the strap 3. In this way, the electrode plate ears 2 are joined by welding to form the strap 3.
- FIG. 4 is a schematic view showing a cross section in which electrode lugs manufactured by the structure are integrally joined by a wrench method shown in FIG.
- reference numeral 2 denotes an electrode plate ear
- 3 denotes a strap
- 23 denotes a welded joint
- 15 and 8 denote metal structures formed in the strap.
- a columnar structure is formed as described later.
- Reference numeral 9 denotes a structural structure formed at the ears of the electrode plate
- 10 denotes a boundary of the metal structure
- 11 denotes a boundary of the distribution of metal elements.
- the electrode lug 2 and the additional lead 7 are mutually melted.
- the formed portion, that is, the joint between the lower surface of the strap 3 and the upper end of the electrode plate ear 2 is referred to as a weld joint 23.
- the wrench method When the wrench method is used, heat is easily transferred via a welding jig such as the comb 4 shown in FIG. 3 during welding. Therefore, the added lead in the molten state is cooled from the strap lower surface. As a result, as shown in FIG. 4, the strap 3 is formed by the growth of the columnar crystal microstructure 8 from the lower surface to the upper surface. On the other hand, the metal ear formed at the time when the lattice was formed is formed in the electrode lug 2. In FIG. 4, since the lug of the electrode plate is produced by gravity structure, a granular structure 9 is formed as a metal structure. In this way, different portions of the metal structure are formed at the welded joint 23. This is called the boundary 10 of the metallographic structure. In this way, at the boundary of the metallographic structure, the structural structures on both sides are different,
- the composition (usually alloy type) of the additional lead forming the strap 3 and the electrode plate ear 2 is often different.
- the additional lead 7 has pure lead (Pb), a Pb—Sn alloy, and a pole plate (grid) with Pb. — C a — S n-based alloys are often used.
- the welded joint is analyzed using an electron beam microanalyzer (EPMA, hereinafter referred to as EPMA).
- EPMA electron beam microanalyzer
- the phrase “different compositions between the electrode plate ear 2 and the strap 3” does not mean only the case where a different metal element is contained. This includes the case where the types of elements constituting the alloy are the same, but the composition ratio of each element is different.
- a method for improving the corrosion at the plate ears when the alloys are different between the plate ears and the strap and the two are joined together by welding is disclosed in Japanese Patent Laid-Open Publication No. It is proposed in Japanese Patent No. 2500894.
- the gist of the invention of JP-A-11-250894 is as follows.
- the electrode lug produced by rolling has a fibrous metal structure.
- the fibrous metal structure changes to a granular structure due to heat. This granular structure had a problem that it was inferior in corrosion resistance to the fibrous structure.
- the electrode plate lugs are coated with a low melting point lead alloy and then joined by welding. This suppresses "change in fiber structure to granular structure due to recrystallization" at the time of welding, thereby improving corrosion resistance. Disclosure of the invention
- the boundary 10 of the metal structure and the boundary 11 of the distribution of metal elements are formed at the same welded joint 23.
- the lead storage battery was found to have a short life.
- the reason is that the corrosion caused by the different metallographic structures mentioned above and the electric current caused by the difference of the alloy type. This is because the corrosion caused by the difference occurs in the same place, and corrosion is intensively promoted in the welded joint 23 due to a synergistic effect of the two.
- the determination as to whether or not “the boundary 10 of the metal structure and the boundary 11 of the distribution of the metal elements are formed in the same welded joint 23” is made as follows.
- the longest distance between the boundary 10 of the metal structure and the boundary 11 of the distribution of metal elements in the height direction (vertical direction in FIGS. 4 and 6) of the electrode plate ear is 0.5 mm.
- the boundary 10 of the metal structure and the boundary 11 of the distribution of the metal elements are not formed in the same welded joint 23.
- the longest distance between the boundary 10 of the metallographic structure and the boundary 11 of the distribution of metal elements in the height direction of the lug of the electrode plate is less than 0.5 mm, the condition The boundary 10 of the structure and the boundary 11 of the distribution of metal elements are formed in the same welded joint 23.
- An object of the present invention is to provide a lead-acid battery which suppresses corrosion at a welded joint and has excellent life performance and a method for manufacturing the same.
- a lead-acid battery in which an electrode plate ear and a strap are integrally formed, wherein an alloy type is different between the electrode plate ear and the strap.
- the longest length of the distance between the boundary of the metal structure to be formed and the boundary of the distribution of metal elements is 0.5 mm or more.
- the phrase “the electrode plate ears and the strap are integrally formed” described in this specification does not mean that the electrode plate ears and the strap are formed simultaneously by a single structure. This means that in the finished lead-acid battery, the electrode lugs and the strap are formed as one metal part.
- the strap is formed by the method shown in FIG. 3 in which the strap is joined to the pole ears previously formed as a solid at the same time when the strap for melting and solidifying the added lead is formed. Including the joined body of the electrode plate ear and the strap.
- a second invention according to the present invention is the lead-acid battery according to the first invention, wherein the distance between the boundary of the metal structure and the boundary of the distribution of metal elements formed in the electrode lug is determined by the distance The maximum length on the surface is 0.5 mm or more.
- the measuring method of “the length of the distance between the boundary of the metal structure and the boundary of the distribution of metal elements on the surface of the electrode lug” is a method of measuring the distance on the surface of the electrode lug. Except for doing the same, in the first invention, "the boundary of the metal structure formed in the The distance from the boundary of the metal element distribution is the same as the measurement method.
- Corrosion of the plate ears progresses from the surface of the plate ears to ⁇ . Therefore, if the distance between the boundary of the metal tissue and the boundary of the distribution of metal elements is 0.5 mm or more on the surface of the electrode lug, use of a lead-acid battery near that part Almost no corroded parts can be present over a long period of time from the start.
- a third invention according to the present invention is the lead storage battery according to the first invention or the second invention, wherein the electrode plate ear and the strap are used for a positive electrode.
- a fourth invention according to the present invention is the lead-acid battery according to the first invention or the second invention, wherein the proportion of Pb in the composition of the strap is 90 mass. / 0 or more and 100% by mass or less, and the ratio occupied by Sn is 0% by mass or more and 5% by mass or less, and the ratio occupied by Pb in the composition of the electrode plate ears is 90% by mass. /. Not less than 100% by mass, the proportion occupied by Ca is 0% by mass or more and less than 0.05% by mass, and the proportion occupied by Sn is 0% by mass or more and 5% by mass. /. It is as follows.
- a fifth invention according to the present invention is the lead-acid battery according to the first invention or the second invention, wherein the proportion of Pb in the composition of the strap is 90% by mass or more and 100% by mass. /. And the proportion occupied by Sn is 0% by mass or more and 5% by mass or less, and the composition occupied by Pb is 90% by mass or more and 100% by mass in the composition of the electrode lugs. /.
- the proportion occupied by Ca is from 0.05% by mass to 0.15% by mass, and the proportion occupied by Sn is from 0% by mass to 3% by mass.
- a sixth invention according to the present invention is a method for manufacturing a lead-acid battery in which an electrode plate ear and a strap are integrally formed, wherein at least a part of the electrode plate ear is melted and then solidified by cooling. Thereafter, the strap is formed by solidifying molten lead or a molten lead alloy so as to be joined to the electrode lug.
- a seventh invention according to the present invention is the lead-acid battery manufacturing method according to the sixth invention, wherein at least a part of the electrode plate ears is melted and then solidified by cooling, the longest length of the height of the part.
- the force is SO .5 mm or more.
- the method for measuring “the height of the portion solidified by cooling after melting at least a part of the electrode plate ear” in the seventh invention is described in “The height of the electrode plate ear is formed in the electrode plate ear”. Distance between the boundary of the metallographic structure and the boundary of the distribution of the metal elements ”.
- An eighth invention according to the present invention is the lead-acid battery manufacturing method according to the sixth invention, wherein at least a part of the electrode plate ears is melted and then solidified by cooling, The longest length on the side surface of the plate ear is 0.5 mm or more.
- the “side surface of the electrode plate ear” in the eighth invention refers to the left and right surfaces of the electrode plate ear in FIG.
- the measuring method of “the height of the height of the portion solidified by cooling after melting at least a part of the electrode plate ear portion on the side surface of the electrode plate ear portion” is as follows. , This is the same as the measuring method of the “length of the distance between the boundary of the metal structure and the boundary of the distribution of metal elements on the surface of the electrode lug” in the second invention.
- a ninth invention according to the present invention is the method for producing a lead storage battery according to the sixth, seventh or eighth invention, wherein the electrode plate ears and the strap are used as a positive electrode.
- a tenth invention according to the present invention is the method for manufacturing a lead storage battery according to the sixth, seventh, or eighth invention, wherein a ratio of Pb to the composition of the strap is 90 mass. / 0 or more 100 mass. / 0 or less, and the proportion occupied by Sn is 0 mass% or more and 5 mass%. / 0 or less, the proportion of Pb in the composition of the electrode plate ears is 90% by mass or more and 100% by mass. / 0 or less, the proportion occupied by Ca is 0% by mass or more and less than 0.05% by mass, or the proportion occupied by Sn is 0% by mass. / 0 or more 5 mass. /. The following is assumed.
- An eleventh invention according to the present invention is the method for manufacturing a lead storage battery according to the sixth, seventh or eighth invention, wherein the composition of the strap is as follows.
- the ratio occupied by ⁇ is 90% by mass or more and 100% by mass. / 0 or less
- the ratio occupied by Sn is 0% by mass or more and 5% by mass or less
- the ratio occupied by Pb in the composition of the electrode plate ears is 90% by mass. / 0 to 100% by mass
- Ca accounts for 0.05% to 0.15% by mass
- Sn accounts for 0%. / 0 to 3% by mass.
- the strap is formed using a comb having a notch having a thickness of 4 mm or more.
- the present invention provides a lead-acid battery in which an electrode lug and a strap of different alloy types are integrally formed, and separates a boundary of a metal structure and a boundary of a distribution of metal elements near a joint thereof. It is. This disperses the corrosion of the electrode plate ears during use of the lead-acid battery, so that corrosion that penetrates deeply into the electrode plate ears is suppressed. As a result, the life performance of lead-acid batteries is greatly improved.
- the method for manufacturing a lead storage battery of the present invention is a method of forming a boundary portion of a metal structure and a boundary portion of a distribution of metal elements on an electrode plate ear portion separately.
- a part of the electrode lugs is first melted with a burner or the like, and then solidified by cooling. In this way, the melted portion solidifies while the metal structure grows from bottom to top, so that the same columnar crystal metal structure as when the strap is formed is formed.
- a strap is formed so as to be joined to the pole lug.
- the same columnar crystal microstructure is formed on both sides of the strap and the plate lug in the welded joint.
- the boundary of the metal structure is not formed in this portion, but only the boundary of the element distribution due to the difference in the alloy type between the strap and the electrode plate ear is formed.
- the height of the portion constituted by the columnar crystal microstructure formed by cooling after melting a part of the electrode lug is the highest.
- the high part must be at least 0.5 mm.
- FIG. 1 is a schematic diagram showing the corrosion state of the product of the present invention.
- FIG. 2 is a schematic diagram showing the corrosion state of a conventional product.
- FIG. 3 is a perspective view of an essential part showing an example of joining by welding.
- FIG. 4 is a schematic view of a cross section joined by welding.
- FIG. 5 is a schematic view showing one example of the production method of the present invention.
- FIG. 6 is a schematic view of a cross section joined by welding in the present invention.
- FIG. 7 is a schematic view showing a cell for an energization test.
- FIG. 8 is a schematic diagram showing elements of a lead storage battery in Examples and Comparative Examples.
- FIG. 9 is a schematic diagram showing a joint state between the electrode tabs and the strap of the lead storage battery in the example.
- FIG. 10 is a schematic diagram showing a joint state between the electrode tabs and the strap of the lead storage battery in the embodiment.
- FIG. 11 is a diagram showing the effect of the distance between the boundary of the metal structure and the boundary of the distribution of metal elements on the corrosion depth. Preferred embodiments for implementing the present invention
- FIGS. 5 (a), (b), (c) and (d) are schematic views showing an example of the method of implementation.
- reference numeral 1 denotes an electrode plate group
- 2 denotes an electrode plate ear
- 21 denotes a part of the electrode plate ear in a molten state.
- 3 is a strap
- 4 is a comb
- 4 1 is a comb-shaped notch provided in the comb 4
- 5 is a welding aid B (generally referred to as an agate). Show.
- FIG. 5 (a) shows a state in which the electrode tabs 2 having a granular structure formed by gravity structure are fitted into the notches 41 of the comb 4 and the metal 5 is in contact with the comb 4.
- the comb 4 and the metal 5 used had a thickness of 4 mm.
- the thickness of the comb 4 here refers to the distance from the upper surface of the cutout 41 of the comb 4 (that is, the lower surface of the container into which the lead 7 serving as the strap 3 flows) to the lower surface of the comb 4. That is, the thickness of the comb 4 is equal to the thickness of the notch 41 of the comb 4.
- FIG. 5 (b) shows a part of the electrode plate A state in which the molten portion 21 of the electrode plate ear 2 is formed to a portion below the upper surface of the cut portion 41 of the comb 4 (that is, the lower surface of the container into which the lead 7 serving as the strap 3 is poured). Show.
- the heat of the burner is conducted to the back side of the comb 4, and the molten portion 21 of the electrode plate 2 frequently drops off from the comb. Occurred.
- the use of the 4-mm comb 4 and the gold 5 prevented dripping. Therefore, in the present invention, it is preferable to use a comb having a thickness of 4 mm or more.
- the molten portion 21 is solidified by being temporarily cooled, the melted portion solidifies while the metal structure grows from bottom to top, so that the same columnar crystal as that used when forming the strap is formed.
- Metal structure is formed. At this stage, two types of metal structures are formed within the same electrode lug, while having the same alloy composition, but with columnar crystals at the upper end and granular structures at the lower end.
- FIG. 5 (c) is a view showing a process in which the additional lead 7 is melted by the burner 6 and poured into a container composed of the comb 4 and the metal 5.
- the additional lead 7 is supplied while being melted to form the strap 3. Thereby, the strap 3 joined to the electrode plate ear 2 is formed.
- FIG. 5 (d) shows a state in which the strap 3 and the electrode plate ear 2 are integrally formed by the above method.
- FIG. 6 is a schematic diagram showing a cross section of the strap 3 and the electrode plate ear 2 formed by the above method.
- 2 is the electrode plate ear
- 3 is the strap
- 2 3 is the welded joint
- 8 is the columnar metal structure
- 9 is the rust metal structure
- 10 is the boundary of the metal structure
- 11 is the metal element distribution. The boundaries are indicated.
- the boundary 11 of the metal element distribution is formed at the welded joint 23.
- the boundary 10 of the metallographic structure is the lower part of the columnar crystal structure formed in the plate ear 2 and the metal structure originally possessed by the plate ear 2 (here, the granular structure). Formed at the boundary with. In this way, the boundary 10 of the metal structure and the boundary 11 of the distribution of the metal elements are separated.
- Pure lead is used for the additional lead that forms the strap, and 97.0 mass is used for the electrode plate ears. / o P b—3.0 mass. /.
- An Sn alloy was used.
- the grid was fabricated by a forging method, and the dimensions of the electrode lugs were 15 mm in width and 4.5 mm in thickness. After melting the electrode lugs, including the process of cooling and solidifying, according to the order of Fig. 5 (a), (b), (c) and (d), the electrode lugs are joined by welding, A strap was formed.
- the plate lugs were joined by welding in the same manner as in Example 1 except that the composition of the lead forming the strap and the Pb—Sn alloy used for the plate lugs were changed. Was formed.
- FIG. 7 reference numeral 2 denotes an electrode plate ear, 3 denotes a strap, 12 denotes a conductive rod, 13 denotes an electrolyte surface, 14 denotes a glass separator, and 15 denotes a counter electrode.
- a voltage is applied so that a current flows from the strap and the plate ear to the counter electrode (that is, the potential of the strap and the plate ear becomes more noble than the counter electrode).
- a test was conducted in which a current of 30 O mA was applied for 4 months. The electrolyte level was always kept above the strap, and dilute sulfuric acid with a specific gravity of 1.30 (at 20 ° C) was used for the electrolyte. After the test was completed, each cell was disassembled and the strap portion was taken out, and the corrosion state of the electrode plate ear and the strap was compared and observed by observing the cross section.
- FIG. 1 is a schematic diagram showing the corrosion state of the strap and the electrode plate ears in Examples 1 to 12 after the test. 16 indicates a corroded layer, and 17 indicates intergranular corrosion.
- the other components are given the same numbers as in FIG.
- FIG. 2 is a schematic view showing the corrosion state of the strap and the electrode plate ears in Comparative Examples 1 to 12 after the test. 16 indicates a corroded layer, and 17 indicates intergranular corrosion.
- the other components are given the same numbers as in FIG. Comparative evaluations of the corrosion state of Examples 1 to 12 and Comparative Examples 1 to 12 were made based on the length of intergranular corrosion that penetrated into the inside from the surface of the electrode plate. For example, the length of the part a in Fig. 1 or the part b in Fig. 2 was measured, and when multiple intergranular corrosion occurred, the length of each was measured and integrated. .
- the intergranular corrosion length at the boundary of the metal structure and the boundary of the distribution of metal elements was measured by a metal micrograph of one cross section of the strap and the lug of the electrode plate.
- the position of the boundary of the distribution of the metal elements was analyzed by EPM A.
- Example 1 the composition and the intergranular corrosion length of the Pb—Sn alloy used for the “electrode lug” and the “lead forming the strap” Table 1 shows the measurement results.
- the numerical value of the length of intergranular corrosion in Table 1 is the average of the measured values at multiple electrode lugs.
- Example 1 2 0.6. 2. 9
- Comparative Example 112 since the boundary of the metallographic structure and the boundary of the distribution of the metal elements are formed in the same place, intergranular corrosion is intensive in this part. happens. As a result, as shown in Table 1, it became clear that intergranular corrosion had deeply penetrated into the inside of the electrode plate ears.
- Example 112 the boundary where the intergranular corrosion occurs is dispersed because the boundary of the metal structure and the boundary of the distribution of the metal elements are separated. Therefore, intergranular corrosion plates The length of penetration into the ear has been reduced. As a result, no deeply penetrated intergranular corrosion leading to breakage of the electrode plate ears was found, and the effect of the present invention became clear.
- Examples 1 to 12 and Comparative Examples 1 to 12 pure lead (Pb) and Pb-3 to 7 were used for "additional lead forming the strap" and "electrode plate ear". Although a 3% by mass alloy was used, the intergranular corrosion tended to increase as the amount of Sn increased. However, as in Examples 1 to 12, when a part of the plate lug is melted and then solidified by cooling, and then the strap is formed so as to be joined to the plate lug, Also in this case, the effect of the present invention was confirmed that the internal penetration of corrosion was suppressed.
- Pure lead is used for the additional lead that forms the strap, and 98.9% by mass to 13_0.1% by mass C a—1.0 mass for the pole plate ears.
- a / oSn alloy was used.
- the grid was fabricated by a fabrication method, and the dimensions of the electrode lugs were 15 mm in width and 4.5 mm in thickness. According to the order shown in Fig. 5 (a), (b), (c), and (d), including the process of melting part of the electrode lugs and then solidifying by cooling, the electrode lugs are joined by welding.
- a strap was formed.
- Pure lead is used for the additional lead that forms the strap, and 98.9 mass is used for the pole ears.
- / oP b 0.1 mass. /.
- a Ca—1.0 mass% 3 n alloy was used.
- the grid was fabricated by a fabrication method, and the dimensions of the electrode lugs were 15 mm in width and 4.5 mm in thickness. Then, the electrode plate lugs were joined by welding to form a strap by the conventional method shown in FIG.
- the electrode plate ears were joined by welding in the same manner as in Example 13 except that the composition of the Pb—Ca—Sn alloy used for the electrode plate ears was changed to form a strap.
- the plate ears were joined by welding to form a strap in the same manner as in Comparative Example 13 except that the composition of the Pb-Ca-Sn alloy used for the plate ears was changed. did.
- Table 2 shows the measurement results of the composition and intergranular corrosion length of the Pb—Ca—Sn alloy used for the electrode tabs of Examples 13 to 26 and Comparative Examples 13 to 26.
- the numerical value of the length of intergranular corrosion in Table 2 is the average value of the measured values at multiple electrode lugs.
- the content of Ca was 0.05, 0.15, and 0.2 mass. /.
- Comparative Example 14 Example 14, Comparative Example 18, Example 18, Comparative Example 22 and Example 22 using an electrode plate having Sn content of 2% by mass.
- the integrated amount of the length of intergranular corrosion was smaller at all Ca contents than when the Sn content was higher or lower than 2.0% by mass. This is probably because almost all of 2.0 mass% of Sn precipitates at the grain boundary as an intermetallic compound Sn 3 Ca, and this substance has high corrosion resistance.
- the amount of corrosion varied depending on the amounts of Ca and Sn, but in each case, the corrosion was dispersed in the case of the example.
- the integrated amount of the length of intergranular corrosion was smaller in the example than in the comparative example, and it was clarified that the present invention was effective in improving the life of the lead storage battery.
- the Sn content in the entire lead alloy is preferably 0% by mass or more and 5% by mass or less.
- the content of Ca in the entire lead alloy is less than 0.05, the content of Sn in the entire lead alloy is 0% by mass or more and 5% by mass or less. Is preferred.
- the content of Sn in the whole lead alloy is 0% by mass or more and 3% by mass or less.
- the content of Ca in the entire lead alloy is preferably from 0.05% by mass to 0.15% by mass.
- the content of pure lead or lead in the total lead alloy used is preferably 90% by mass or more, both in the electrode lugs and in the lead forming the strap.
- a strap was formed in the same manner as in Example 1 except for the following two points. One is 98.44% by mass of the paste on the pole plate and 0.03% by mass of 3-1.5% by mass. / o Sn alloy, plus 99 mass of lead. / o Pb-1 mass% 5 n alloy was used. The other is that in the process of melting and then cooling and solidifying the electrode plate ears, several types of bonding were performed with varying amounts of melting of the electrode plate ears. Here, by changing the amount of melting, the height direction of the electrode plate edge between the boundary 10 of the metal structure and the boundary 11 of the distribution of the metal element after joining (vertical direction in FIG. 1) Distance can be controlled. A control valve type lead-acid battery (2 V 200 Ah / lO hour rate) in which the positive electrode lugs were joined in this manner was produced.
- a float life test was performed at 65 ° C, a set voltage of 2.23 V, and 10 months of cells.
- the battery was disassembled, the AA cross section shown in Fig. 8 was cut and polished, and the metal structure and the corrosion state were observed.
- Fig. 8 shows the elements of the produced lead storage battery. The element is obtained by laminating a positive electrode and a negative electrode via a separator.
- 51 is the positive plate
- 52 is the negative plate
- 53 is the separator
- 54 is the positive strap
- 55 is the negative strap
- 56 is the positive pole
- FIG. 9 is a schematic cross-sectional view of a part of a positive electrode plate ear and a strap
- FIG. 10 is an enlarged view of a portion surrounded by a dotted line in FIG.
- 61 is a region that did not melt during welding of the plate ears
- 62 was a region that melted and solidified before forming the strap during welding of the plate ears
- 63 was along the boundary.
- Corrosion, c is the depth of corrosion along the boundary
- d is the longest length at the distance between boundaries.
- the longest length d at the distance between the boundary of the metallographic structure and the boundary of the distribution of metal elements, and corrosion along the boundary The depth was measured.
- the corrosion depth along the boundary when corrosion extending from both sides was separated, the value with the larger corrosion depth was used. This measurement was performed on all of the positive electrode lugs of the positive electrode of the manufactured lead storage battery.
- Figure 11 shows the measurement results of the longest distance between the boundaries of the positive electrode strap and the average corrosion depth.
- the maximum length of the distance between the boundaries is divided at intervals of 0.25 mm, and the average corrosion depth is shown for each.
- the method of calculating the average is as follows. Based on the "longest distance between boundaries" of each pole ear, each pole ear is classified at 0.25 mm intervals. For each category, determine the average corrosion depth of the plate ears that fall into that category.
- FIG. 11 shows the product of the present invention
- B shows a comparative example. From Fig. 11, it can be seen that if the maximum length of the distance between the boundary of the metal structure and the boundary of the metal element distribution is 0.5 mm or more, corrosion along these boundaries is significantly suppressed. all right.
- the welding connection by the burner method was described.
- the welding method is not limited to the burner method, and the present inventor has another request that the same effect can be obtained by the welding method by the arc method. Confirmed by test.
- the present invention separates the boundary of the metal structure and the boundary of the distribution of metal elements in a lead-acid battery in which an electrode lug and a strap of different alloy types are integrally formed. It is a structure that has been made. This disperses the corrosion of the plate ears during use of the lead-acid battery, suppresses corrosion that penetrates deeply into the ⁇ of the plate ears, and greatly improves the life performance. Therefore, its industrial effect is extremely large.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005515365A JPWO2005045956A1 (ja) | 2003-11-07 | 2004-11-04 | 鉛蓄電池およびその製造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-378142 | 2003-11-07 | ||
JP2003378142 | 2003-11-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005045956A1 true WO2005045956A1 (ja) | 2005-05-19 |
Family
ID=34567165
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/016712 WO2005045956A1 (ja) | 2003-11-07 | 2004-11-04 | 鉛蓄電池およびその製造方法 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPWO2005045956A1 (ja) |
WO (1) | WO2005045956A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017092038A (ja) * | 2016-12-28 | 2017-05-25 | 株式会社Gsユアサ | 制御弁式鉛蓄電池 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01117269A (ja) * | 1987-10-30 | 1989-05-10 | Shin Kobe Electric Mach Co Ltd | 鉛蓄電池の群溶接方法 |
JPH076766A (ja) * | 1993-06-14 | 1995-01-10 | Matsushita Electric Ind Co Ltd | 鉛蓄電池 |
JPH076750A (ja) * | 1993-06-14 | 1995-01-10 | Matsushita Electric Ind Co Ltd | 鉛蓄電池の製造法 |
JPH11111329A (ja) * | 1997-10-02 | 1999-04-23 | Shin Kobe Electric Mach Co Ltd | 鉛蓄電池及びその製造法 |
JP2002008624A (ja) * | 2000-06-22 | 2002-01-11 | Japan Storage Battery Co Ltd | 鉛蓄電池用ストラップ |
-
2004
- 2004-11-04 WO PCT/JP2004/016712 patent/WO2005045956A1/ja active Application Filing
- 2004-11-04 JP JP2005515365A patent/JPWO2005045956A1/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01117269A (ja) * | 1987-10-30 | 1989-05-10 | Shin Kobe Electric Mach Co Ltd | 鉛蓄電池の群溶接方法 |
JPH076766A (ja) * | 1993-06-14 | 1995-01-10 | Matsushita Electric Ind Co Ltd | 鉛蓄電池 |
JPH076750A (ja) * | 1993-06-14 | 1995-01-10 | Matsushita Electric Ind Co Ltd | 鉛蓄電池の製造法 |
JPH11111329A (ja) * | 1997-10-02 | 1999-04-23 | Shin Kobe Electric Mach Co Ltd | 鉛蓄電池及びその製造法 |
JP2002008624A (ja) * | 2000-06-22 | 2002-01-11 | Japan Storage Battery Co Ltd | 鉛蓄電池用ストラップ |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017092038A (ja) * | 2016-12-28 | 2017-05-25 | 株式会社Gsユアサ | 制御弁式鉛蓄電池 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2005045956A1 (ja) | 2007-05-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5002954B2 (ja) | 鉛蓄電池 | |
JP5050309B2 (ja) | 鉛蓄電池 | |
JP2000077076A (ja) | 蓄電池用鉛基合金 | |
JP2006210210A (ja) | 鉛蓄電池 | |
WO2005045956A1 (ja) | 鉛蓄電池およびその製造方法 | |
JP2005228685A (ja) | 鉛蓄電池 | |
JP2000315519A (ja) | 鉛蓄電池 | |
JP2008218258A (ja) | 鉛蓄電池 | |
JP6455105B2 (ja) | 鉛蓄電池 | |
JPH11250894A (ja) | 鉛蓄電池及びその製造法 | |
JP5182464B2 (ja) | 鉛蓄電池用負極集電体及び該集電体を用いた鉛蓄電池の製造方法 | |
JP4265260B2 (ja) | 制御弁式鉛蓄電池 | |
JP4896392B2 (ja) | 鉛蓄電池 | |
JP2002093457A (ja) | 鉛蓄電池 | |
JP2003323881A (ja) | 制御弁式鉛蓄電池 | |
JPH11111329A (ja) | 鉛蓄電池及びその製造法 | |
JP4793518B2 (ja) | 鉛蓄電池 | |
JPH07245101A (ja) | 鉛蓄電池極板群の製造法 | |
JP3509294B2 (ja) | 鉛蓄電池 | |
JP2007157610A (ja) | 鉛蓄電池 | |
JP3334299B2 (ja) | 鉛蓄電池 | |
JP2002343334A (ja) | 鉛蓄電池およびその製造方法 | |
JP3134466B2 (ja) | 鉛蓄電池 | |
JPH10208750A (ja) | 鉛蓄電池 | |
JP3658871B2 (ja) | 鉛蓄電池 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2005515365 Country of ref document: JP |
|
122 | Ep: pct application non-entry in european phase |