Source: https://patents.google.com/patent/US6385829
Timestamp: 2018-04-19 23:30:59
Document Index: 575114850

Matched Legal Cases: ['application No. 09', 'art) 8', 'art 11', 'art 11', 'art 11', 'art 12', 'arts 11', 'arts 8', 'arts 8', 'art 8', 'art=400', 'art 11', 'arts 11', 'arts 11', 'art 20', 'art 8', 'art 20', 'art 20', 'art 8', 'art 20', 'art 19', 'art 20', 'art 8', 'art 8', 'art 8']

US6385829B2 - Manufacturing method for a lead-acid battery electrode plate - Google Patents
Manufacturing method for a lead-acid battery electrode plate Download PDF
US6385829B2
US6385829B2 US09878973 US87897301A US6385829B2 US 6385829 B2 US6385829 B2 US 6385829B2 US 09878973 US09878973 US 09878973 US 87897301 A US87897301 A US 87897301A US 6385829 B2 US6385829 B2 US 6385829B2
US09878973
US20010042288A1 (en )
Takao Omae
Akira Kamada
H01M4/82—Multi-step processes for manufacturing carriers for lead-acid accumulators
H01M4/14—Electrodes for lead-acid accumulators
H01M4/16—Processes of manufacture
H01M4/20—Processes of manufacture of pasted electrodes
A lead-acid battery electrode plate is manufactured by consecutively supplying a lead or lead alloy sheet; leaving a part in the vicinity of the center of the sheet as a non-expansion portion and expanding both sides like mesh to form a grid body; filling active material paste into the grid body; and cutting the grid body to predetermined dimensions. In the lead-acid battery electrode plate, the non-expansion portion forms a current collector part of the electrode plate along an expansion portion in an up and down direction of the electrode plate. One or more openings are made in a part of the non-expansion portion. A part of the non-expansion portion is projected above the position of an upper margin of the cut expansion portion as a current collector lug part. When the current collector lug part is placed upside, the expansion direction is the width direction of the electrode plate.
This is a divisional of application No. 09/488,639 filed Jan. 21, 2000, the disclosure of which is incorporated herein by reference.
BACKGROUND OF THE TNVENTION
This invention relates to an expanded grid body mainly used with a large-sized lead-acid battery and a manufacturing method of an electrode plate using the expanded grid body.
As a manufacturing method of pasted-type lead-acid battery electrode plate, for example, there is the following manner as shown in FIG. 1. That is, a lead or lead alloy sheet 1 is expanded like mesh by an expanding machine 2. A current collector lug part (simply referred lug part) 8 is formed in a non-expansion portion 4. A grid body which is an expansion portion 3 is filled with an active material paste. Thereafter, the grid body is cut by a cutter 9 to separate electrode plates of a predetermined size. This method is high in productivity and so-called expanded electrode plates manufactured by the method are uniform and the mass of the grid body relative to the active material can be decreased, so that weight reduction is possible.
Hereinafter, the width and the height of the grid body or electrode plate will refer to directions when the grid body or electrode plate is placed with the lug part upside.
An electrode plate of a large-capacity lead-acid battery used as a backup power source of telecommunication, etc., or an emergency power source is sized about 150 mm in the width direction, but about 250 to 500 mm in the height direction with a lug part upside. If such a large-sized electrode plate is formed of an expanded plate which is expanded in the grid body height direction with a non-expansion portion left as shown in FIG. 2, the expanded portion grows and thus the following disadvantages are included:
Since the height of expanded portion becomes large, the manufacturing devices are upsized;
handling at the assembling time becomes difficult to perform (warpage, deformation of electrode plate because of insufficient strength); and
voltage drop in the expansion portion becomes remarkably large and poor discharge performance results.
As a method of overcoming these disadvantages, a method of increasing a non-expansion portion 4 in the upper part of a grid body and providing an opening 13 in the increased part (JP-U-58-133271) as shown in FIG. 3, and a method of leaving a non-expansion portion 4 both in margins and in the center and providing an opening 13 in the center (JP-A-2-267864, FIG. 4) have been proposed. However, improvement in the discharge performance is insufficient for a large-sized electrode plate of which is large in the height direction as compared with the width direction. Then, several expanded electrode plates (grid bodies), each expanded in the grid body width direction with a non-expansion portion left in the grid body height direction were proposed in the past (for example, JP-A-54-177525, JP-B-59-51107, JP-B-61-8540, and JP Patent No. 2765020).
Since an electric current flowing into an electrode plate also becomes large in a large battery, it is necessary to widen the lug part width to some extent. However, if the lug part and the non-expansion portion following the lug part are set to the same width, the grid body mass is increased and the active material holding (filling) amount is decreased. Then, in the expanded electrode plates which are expanded in the grid body width direction, the width of the non-expansion portion 4 following the lug part 11 is made narrower than the width of the lug part 11 as shown in FIG. 5. However, the lug part 11 of the grid body of this shape extends off an active material fill part 12 to one side. Thus, as shown in FIG. 6, if an electrode plate using the grid body of this shape is superposed on an electrode plate different in polarity to manufacture a battery, a portion 14 not overlapping the adjacent electrode plate occurs and the efficiency of active material availability decreases, leading to capacity shortage of the battery. Particularly, in a valve regulated sealed lead-acid battery using a fine glass fiber separator, it is known that a battery with a compression degree of the electrode plate and the separator is inferior in life performance, and there is a possibility that capacity lowering at an early stage will occur because of shortage of the pressure degree in the portion not overlapping the adjacent electrode plate. On the other hand, as shown in FIG. 7, if the electrode plates are placed one upon another so as to completely superpose the active material fill portion 12, current collector lug parts 11 project to a side, thus a battery container 15 must be designed large, resulting in lowering of the volume energy density. Further, a grid body extends in a gap 16 between the electrode plate and the battery container 15, whereby adhesion properties of grid members with active material worsen, leading to lowering of the battery capacity.
To furthermore improve current collection performance and decrease scrap loss, a mesh part is provided on both sides of a non-expansion portion in JP-B-61-8545. However, if a decrease in the scrap loss is given a high priority, an increase in the grid body mass and battery capacity shortage caused by decrease of the active material filling amount introduce a problem.
To provide an active material mass in the expanded grid body expanded in the grid body width direction, an active material may also be filled into a non-expansion portion. As shown in FIG. 1, to fill an active material into the expanded grid body of the conventional shape, the active material is prevented from being deposited on current collection lug parts 8, because welding becomes extremely difficult to perform if an active material is deposited on electrode plate lug parts when the electrode plate of the same polarity lug parts are welded at the battery assembling process. However, as shown in FIG. 8, in the expanded electrode plate expanded in the grid body width direction, to consecutively fill an active material also into non-expansion portion 4 in a concatenation state of grid body like a belt, the active material is also deposited on the lug parts because the electrode plate lug parts 8 are positioned on the same line as the fill part with respect to the grid body travel direction To circumvent this problem, it is also possible that the direction is changed after cut to separate grid body forms and that the grid body is passed through a pasting machine with the grid body set perpendicular to the travel direction, but uniformity of filling and the productivity of electrode plates are degraded.
In fact, the expanded grid bodies expanded in the width direction are scarcely used because of the problems.
It is therefore an object of the invention to provide a grid body form that can be intended for reducing the weight of an electrode plate and enhancing the productivity of the electrode plate and a manufacturing method of an electrode plate using the grid body form without degrading battery performance to apply an expanded electrode plate to a large-sized lead-acid battery.
According to the present invention, a lead-acid battery electrode plate manufactured by a process comprises the steps of: (1) consecutively supplying a lead or lead alloy sheet; (2) leaving a part in the vicinity of the center of the sheet as a non-expansion portion and expanding both sides like mesh to form a grid body; (3) filling active material paste into the grid body; and (4) cutting the grid body to predetermined dimensions; wherein the non-expansion portion forms a current collector part of the electrode plate along an expansion portion in an up and down direction of the electrode plate; one or more openings are made in a part of the non-expansion portion; a part of the non-expansion portion is projected above the position of an upper margin of the cut expansion portion as a current collector lug part; and when the current collector lug part is placed upside, the expansion direction is the width direction of the electrode plate.
According to the present invention, a manufacturing method of a lead-acid battery electrode plate comprises the steps of: consecutively supplying a lead or lead alloy sheet; leaving a part in the vicinity of the center of the sheet as a non-expansion portion and expanding both sides like mesh to form a grid body, so that the non-expansion portion forms a current collector part of the electrode plate along an expansion portion in an up and down direction of the electrode plate; making one or more openings in a part of the non-expansion portion; filling active material paste into the grid body; and cutting the grid body to predetermined dimensions; wherein a part of the non-expansion portion is projected above the position of an upper margin of the cut expansion portion as a current collector lug part; and when the current collector lug part is placed upside, the expansion direction is the width direction of the electrode plate.
According to the invention, the electrode plate using the expanded grid body excellent in discharge performance and productivity can be provided particularly as a large-sized lead-acid battery electrode plate.
FIG. 1 is a schematic drawing to show a manufacturing method of a conventional expanded grid body and an electrode plate using the grid body;
FIGS. 2 to 5 are drawings to show conventional examples of large-sized expanded grid bodies;
FIGS. 6 and 7 are drawings to show combination examples of electrode plates using conventional large-sized expanded grid body expanded in the grid body width direction;
FIG. 8 is a drawing to show an example of taking out a grid body expanded in the width direction from an expanded sheet;
FIG. 9 is a drawing to show the form of a grid body of the invention before filling and cutting;
FIG. 10 is a drawing to show the form of the grid body of the invention after cutting;
FIG. 11 is an enlarged schematic drawing to show the grid body of the invention;
FIG. 12 is a drawing to show an example of a conventional large-sized expanded grid body;
FIG. 13 is a drawing to show a comparison example of an expanded grid body of the invention;
FIGS. 14 to 16 are drawings to show the outlines of large-sized expand electrode plates different in grid body shape;
FIGS. 17A, 17B and 17C are enlarged schematic drawings to show the comparison example of the expanded grid body of the invention shown in FIG. 13;
FIG. 18 shows comparison of 0.2C10A discharge duration of different types of batteries before and after overcharge test;
FIG. 19 is a drawing to show the outline of a positive plate of batteries A and G before and after overcharge test;
FIG. 20 is a drawing to show the outline of a positive plate of batteries B, C and D before and after overcharge test;
FIG. 21 is a drawing to show the outline of a positive plate of battery E before and after overcharge test;
FIG. 22 is a drawing to show the outline of a positive plate of battery F before and after overcharge test;
FIG. 23 is a schematic drawing to show an electrode plate using the grid body of the invention subjected to pasting the active material and cutting steps;
FIG. 24 is a schematic drawing to show an example of a manufacturing method of an electrode plate using the grid body of the invention;
FIG. 25 is a schematic drawing to show the electrode plate of the invention after a lug part is ground; and
FIG. 26 is a drawing to show an example of the grid body of the invention.
PREFERRED EMBODTMENTS OF THE INVENTION
Preferred embodiments of the present invention will be discussed, but it is understood that the present invention is not limited to the embodiments.
A sheet 2.0 mm thick manufactured by rolling a lead-calcium-tin alloy was consecutively expanded with a non-expansion port 4 left in the center as shown in FIG. 9. Subsequently, the non-expansion portion 4 of the expanded sheet was formed with openings 13 intermittently and a part of the expansion portion was cut at a position indicated by a dotted line 7, whereby a current collector lug part 8 was formed and an expanded grid body of the present invention (grid height H except lug part=400 mm, grid width W=140 mm) as shown in FIG. 10 was manufactured. The openings were made by stamping about 45% of the non-expansion portion when electrode plates were separated. Considering the electrical conductivity, the strength, the active material mass, and the mass of each electrode plate, a proper percentage of the openings is 30% to 70% to the non-expansion portion per electrode plate. This time, each opening was made rectangular, but the shape may be changed as desired depending on a consideration similar to the percentage of the openings described above.
As in the embodiment, the expansion portion is stamped, whereby the stamp chippings can be minimized and the lug part width can also be maximaized.
If high-rate discharge is executed with a battery using the grid body, it is estimated that current will concentrate on the part just below the lug part 11. Thus, as shown in FIG. 11, a distance 17 from the lug part (grid body shoulder, expansion part upper end) to the first opening was set to 1.1 times a mesh major axis dimension 18 of the expansion portion and no opening existed at the side of a top intersection point 19 of mesh intersection points in contact with the non-expansion portion.
To make a comparison, expanded grid bodies having the same grid body mass, the same grid body height except the lug part, and the same (maximum) width as shown in FIGS. 2 to 5, 12 and 13 were manufactured from the same rolled sheet. FIG. 2 shows a grid body in the related art expanded in the grid body height direction; the grid body is matched with the grid body of the invention in mass by changing the cut width at the expanding process. FIG. 3 shows a grid body expanded in the grid body height direction with a non-expansion portion provided in an upper part of the grid body and formed with openings. FIG. 4 shows a grid body expanded in the grid body height direction with a non-expansion portion provided in an intermediate part of the grid body and formed with openings. FIG. 5 shows a grid body expanded in the grid body width direction with the gradually lessened width of a non-expansion portion following a lug part. FIG. 12 shows a grid body having the same mass as the grid body of the invention with no openings made in a non-expansion portion, a wide expansion portion, and the non-expansion portion having a small width compared with the invention grid body. FIG. 13 shows a grid body having the same outside shape as the grid body of the invention with openings in a non-expansion portion increased in the lug part direction (top) and the non-expansion portion width slightly widened accordingly.
Next, pasting paper was applied to the grid bodies, a positive active material was filled so as provide a thickness of 4.0 mm, and the active material was dried only on the surface in a flash drying furnace. Subsequently, unformed positive plates were manufactured through a normal curing and drying process. Since the grid body types differ, after cutting to grid body shapes, filling was performed so as not to fill active material 6 into the lug parts 11; for the grid bodies in FIGS. 5 and 12, the active material was not filled into the non-expansion portion (FIGS. 14 and 15) and for other grid bodies, the active material 6 was filled into the full faces except the lug parts 11 (FIG. 16). Using a lead-calcium-tin alloy rolled sheet 1.1 mm thick, similar working to that of positive grid bodies was performed, whereby expanded grid bodies having the same shapes as the positive grid bodies different only in grid body thickness were manufactured, pasting paper was applied to the expanded grid bodies, and active material was filled so as to provide a thickness of 2.2 mm, then unformed negative plates were manufactured through a similar process to that of the positive plates. The positive and negative plates of the same shape were combined through a fine glass fiber separator to manufacture valve-regulated lead acid batteries of 2 V-150 Ah/10 hour rate. Table 1 lists the contents of the storage batteries.
Batteries used in test in First Embodiment
Battery Positive and Negative Electrode Plates and
No. Content of Grid Bodies corresponding thereto Remarks
A Expansion Direction: Width direction Inventive
Grid body: An openings were provided in a non- Product
expansion portion at a predetermined distance
below a lug part. (FIG. 10)
B Expansion Direction: Height direction Conventional
(FIG. 2) Product
C Expansion Direction: Height direction Conventional
The upper part of a non-expansion portion was Product
widen, and openings were formed. (FIG. 3)
D Expansion Direction: Height direction Conventional
A non-expansion portion was provided in an Product
intermediate part of a grid body and openings
were formed. (FIG. 4)
E Expansion Direction: Width direction Conventional
The width of a non-expansion portion was Product
gradually lessened following a lug part. (FIG. 5)
F Expansion Direction: Width direction Conventional
A non-expansion portion was made small, and Product
openings were not formed. (FIG. 12)
G Expansion Direction: Width direction Comparative
An openings formed non-expansion portions were Product
increased in the lug part direction (top) and a
non-expansion portion width slightly widened.
A dilute sulfuric acid was poured into the storage batteries and container formation was performed, then discharge tests at some discharge rates were carried out. Table 2 lists the test results.
Discharge Test Results of Each Rate
1C10A (150A) 3C10A (450A) 3C10A (450A) Condition of
0.1C10A (15A) Discharge Discharge voltage at Electrode
Battery Discharge Duration Duration fifth sec. of Plate after
No. Duration (h) (min) (min) discharge Test
A 10.37 33.63 5.58 1.78 No abnormal
B 10.53 20.62 1.23 1.56 *1
C 10.42 25.67 3.58 1.64 *1
D 10.43 26.22 1.46 1.58 *1
E 9.53 28.85 5.08 1.76 No abnormal
F 10.25 32.57 4.68 1.71 *1
G 10.33 33.12 3.93 1.74 *1
*1: Negative grid body was melted and diminished.
In low-rate (0.1 C10A) discharge, any batteries except battery E having a small active material mass showed the substantially same discharge duration. In high-rate (1C10A, 3C10A) discharge, storage batteries A, F and G using a grid body expanded in the width direction as a positive electrode showed a longer discharge duration than storage batteries B, C and D using a grid body expanded in the electrode plate height direction. The 3C10A discharge duration of the storage batteries F and G showing the same discharge duration to that of the battery A in the 1C10A discharge was shorter than that of the battery A. After the test, the batteries were disassembled. The negative electrode lug part of the battery F, the mesh intersection point in contact with the upper margin of each of the batteries B, C, and D, and a part 20 (see, FIG. 17A) at the side of the opening just below the negative electrode lug part of the battery G were melted and diminished. Even in the 3C10A discharge, the grid body of the storage battery E was not melted and diminished, but the storage battery E has a smaller active material mass than the battery A using the grid body of the invention, thus showed a small discharge capacity (discharge duration) at each rate.
To reveal the difference between the grid body used with the battery G having the grid body melted and diminished and the grid body of the present invention, a grid body having openings shifted lower than an intersection point 19 nearest to a lug part 8 among mesh intersection points in contact with a non-expansion portion as shown in FIG. 17B, and a grid body having openings shifted exactly as the grid body in FIG. 17B and a mesh intersection point positioned at the side of the opening nearest to a lug part as shown in FIG. 17C were manufactured. These batteries were manufactured in a similar manner to that described above, and 3C10A discharge was executed. The negative electrode grid body of the shape in FIG. 17B was not melted and diminished, but the part 20 at the side of the opening nearest to the lug part of the grid body in FIG. 17C was melted and diminished.
Considering the magnitude of current flowing per cross-sectional area of the grid body, there is a possibility that the mesh intersection point 19 nearest to the lug part may be melted and diminished. However, considering an electrical path with the lower part than the melted and diminished point, it is considered that the effect on the discharge characteristic is small particularly in a battery large in the height direction as compared with the case where the part 20 in the non-expansion portion is melted and diminished. Then, the grid body of the invention was used as a positive electrode, and the grid body of the invention (FIG. 11) wherein the intersection point 19 nearest to the lug part 8 among the mesh intersection points in contact with the non-expansion portion was previously cut and the comparison grid body (FIG. 17C) wherein the part 20 on the expansion portion side at the side of the opening nearest to the lug part was previously cut were used as negative electrodes to manufacture two types of batteries, and 1C10A discharge test was carried out. Table 3 lists discharge duration. The test result indicates that if the mesh intersection point 19 near to the lug part is melted and diminished in high-rate discharge, discharge performance is less degraded if the grid body of the invention is used.
1C10A discharge test result
Battery using negative Battery using negative
electrode with previously cut electrode with previously cut
part 19 of grid body of the part 20 of comparison grid
invention (FIG. 11) cut body (FIG. 17C) cut
Discharge 27.33 19.83
To cut grid bodies consecutively from an expanded sheet to form lug parts, the position of the mesh intersection point 19 nearest to the lug part changes depending on the cut position of the upper end of the expansion portion as in FIGS. 17B and 17C. Thus, to prevent the grid body from being melted and diminished in high-rage discharge, it is desirable that an opening does not exist at the side of mesh intersection point nearest to the lug part. For this purpose, it is advisable to place no openings at least within the mesh major axis dimension 18 from the upper end of the expansion portion.
Thus, it was found that the storage battery A using the grid body of the present invention has excellent discharge performance at both low rate and high rate.
Batteries (A to G) provided aside from the above-described each discharge rate test were subjected to 0.2C10A discharge test, then 0.1C10A constant-current overcharge test was carried out. The overcharge test was carried out at test temperature 60° C. for 60 days, then 0.2C10A discharge test was carried out. Subsequently, the storage batteries were disassembled and the corrosion state of each positive electrode grid body was examined. FIG. 18 shows the capacity test results before and after the overcharge test and FIGS. 19 to 22 show the outlines of the positive plates. FIG. 19 is a drawing to show the outline of a positive plate of batteries A and G before and after overcharge test. FIG. 20 is a drawing to show the outline of a positive plate of batteries B, C and D before and after overcharge test. FIG. 21 is a drawing to show the outline of a positive plate of battery E before and after overcharge test. FIG. 22 is a drawing to show the outline of a positive plate of battery F before and after overcharge test.
The capacities of the batteries B, C, and D after the overcharge test lowered large and the capacity of the battery F lowered large next to those of the batteries B, C, and D. The capacities of the batteries A, E and G lowered small as compared with those before the overcharge test; the capacities of the storage batteries A and G each having a large amount of active material mass were also larger than the battery E after the test. As shown in FIGS. 19 to 22, comparing positive plate outlines 21 before the overcharge test with outlines 22 after the test, the deformation degree of the positive plate of each of the storage batteries B, C, D and F (FIGS. 20 and 22) is larger than that of each of the storage batteries A, E and G (FIGS. 19 and 21) and it is considered that the deformation degree is involved in capacity lowering. That is, it is considered that the capacity is maintained because the positive plate becomes less deformed if the grid body of the invention is used as the positive plate.
Therefore, it was found that the grid body of the invention is a grid body excellent in both discharge performance and life performance.
In the first embodiment, it was found that the grid body of the invention has excellent discharge performance and life performance. An example of a method of actually manufacturing electrode plates consecutively will be discussed. FIG. 24 shows a sequence of steps.
To manufacture the expanded electrode plate shown in FIG. 10, a lead-calcium-tin alloy rolled sheet 2 mm thick and 130 mm wide was expanded to both sides with a non-expansion portion left in the center by a reciprocation-type expanding machine. Next, openings were stamped to provide the shape shown in FIG. 9. If the expanded sheet is cut in the length direction, electrode plates can be taken out two at a time; paraffin as a parting agent of an active material was applied only to a part 8′ corresponding to electrode plate lug part of one series of electrode plates. The sheet was passed through a pasting machine 5 for filling active material paste 6 into the full face of the sheet. At the pasting process, pasting paper was applied to the rear and surface of the expanded sheet and roll press was performed for bringing the pasting paper into intimate contact with the active material. After the pasting, the expanded sheet was cut to predetermined dimensions to form the state shown in FIG. 23. The electrode plate dimensions were 140 mm wide, 400 mm high, 15 mm in lug part width, and 30 mm in lug part height. The cut electrode plate was passed through a flash drying furnace 23 (FIG. 24) and was dried at 200° C. for one minute, whereby only the surface of the electrode plate was dried. After the electrode plate was passed through the flash drying furnace, the lug part of the electrode plate was parallel to the travel direction. Then, the electrode plate whose surface was dried was rotated 90 degrees by a rotating machine 24, making the electrode plate lug part perpendicular to the travel direction of the electrode plate. Subsequently, the lug part was ground by a rotating brush (grinding machine 25) for removing the deposited active material. The grinding time of the lug part by the grinding machine was changed for testing. The active material on an electrode plate lug part 8′ to which paraffin was applied before pasting can be completely removed in about a third the time required for removing the active material on an electrode plate lug part 8 to which no treatment was applied, and a metal shine was observed. In addition to paraffin, grease and Vaseline were also used for testing, and similar results were provided. Before pasting, a parting agent is thus applied to the lug part, whereby the active material removal time can be shortened and the risk of thinning the lug part by grinding it can be lessened.
The purpose of rotating the electrode plate 90 degrees before passing it through the grinding machine 25 is to align the electrode plate lug parts relative to the grinding machine and grind only the lug parts consecutively so that the active material in other portions is not removed. In doing so, the active material on the lug parts can be removed easily and completely.
FIG. 25 shows a state in which the active material on the lug part was removed. Then, the electrode plate was cured at 50° C. for two days. The post-cured electrode plate and a separator were combined to assemble a 2V-1000Ah battery by a normal method. At the assembling process, lug part weldability did not introduce a problem and workability similar to that of conventional articles was observed.
In the sequence of the electrode plate manufacturing steps described in the second embodiment, the timing of removing the active material on the electrode plate lug part using the grid body of the invention was studied. The active material removal timings listed below are possible and thus an experiment was conducted at the timings. Before an active material was pasted into an expansion sheet, paraffin was applied to the part which becomes a lug part as a parting agent.
1) Just after filling, 2) after passing through flash drying furnace, 3) after completion of curing, and 4) just before assembling.
1) Just after pasting: The active material was soft, a rotating brush of a grinding machine was clogged with the active material, and it became hard to remove the active material with time.
2) After passing through flash drying furnace: The active material became hard as compared with that just after pasting, and can be easily removed without being caught in the rotating brush of the grinding machine.
3) After completion of curing: The active material was hard and it took about twice the time in removing the active material; in addition, unintended parts other than the lug part also peeled off together.
4) Just before assembling: Similar result to that in 3) after completion of curing.
From the results, it was found that the appropriate timing of removing the active material on the electrode plate lug part is before curing after passing through flash drying furnace in which only the surface of the electrode plate is dried.
In the description of the embodiments, the lug part placed in the margin of the grid body is taken as an example. However, it was found that the discharge performance of a battery using a grid body comprising an expansion portion on both sides of a non-expansion portion formed with a lug part and openings (FIG. 26) is further enhanced (for example, 1C10A discharge duration is increased about 10%) although the grid body can be taken out only one at a time when an expanded sheet is cut in the length direction to provide grid bodies.
As described throughout the specification, to use an expanded grid body for a lead-acid battery, particularly for a large-sized battery using an electrode plate having a large height dimension, the invention provides an expanded grid body excellent in productivity, voltage characteristic, and life characteristic and a method of efficiently manufacturing an electrode plate from the grid body.
1. A manufacturing method of a lead-acid battery electrode plate, comprising the steps of:
consecutively supplying a lead or lead alloy sheet;
leaving a portion in the vicinity of a center of the sheet as a non-expansion portion and expanding both sides like mesh to form a grid body, so that the non-expansion portion forms a current collector part of the electrode plate along an expansion portion in an up and down direction of the electrode plate;
making one or more openings in a portion of the non-expansion portion;
filling active material paste into the grid body; and
cutting the grid body to predetermined dimensions;
wherein a portion of the non-expansion portion is projected above a position of an upper margin of a cut expansion portion as a current collector lug part; and when the current collector lug part is placed upside, an expansion direction is a width direction of the electrode plate.
2. The lead-acid battery electrode plate manufacturing method as claimed in claim 1, further comprising the step of, after an active material is pasted into a full face containing the non-expansion portion of the grid body, partially removing the active material on a portion corresponding to the current collector lug part for exposing a metal surface.
3. The lead-acid battery electrode plate manufacturing method as claimed in claim 2, wherein the step of partially removing the active material on a portion corresponding to the current collector lug part is performed after a surface of the electrode plate is dried and before a curing step.
4. The lead-acid battery electrode plate manufacturing method as claimed in claim 2, further comprising the steps of, after the active material is consecutively pasted into the grid body concatenated like a belt, separating electrode plates, and subsequently rotating the electrode plate 90 degrees, then partially removing the active material.
5. The lead-acid battery electrode plate manufacturing method as claimed in claim 2, further comprising the step of: before pasting the active material, applying a parting agent onto the portion on which the active material is to be removed after pasting.
6. A manufacturing method of a lead-acid battery electrode plate as claimed in claim 1, wherein after the grid body is cut to predetermined dimensions, active material paste is pasted into a full face containing the non-expansion portion.
US09878973 1999-01-21 2001-06-13 Manufacturing method for a lead-acid battery electrode plate Expired - Fee Related US6385829B2 (en)
JP1356499A JP2000215898A (en) 1999-01-21 1999-01-21 Lead-acid battery grid body
JPP.HEI.11-013564 1999-01-21
JP11-013564 1999-01-21
JP11-121052 1999-04-28
JP12105299A JP2000311678A (en) 1999-04-28 1999-04-28 Manufacture of electrode for lead-acid battery
JP11-199898 1999-07-14
JP19989899A JP2001028262A (en) 1999-07-14 1999-07-14 Manufacture of electrode plate for lead-acid battery
US09488639 US6338919B1 (en) 1999-01-21 2000-01-21 Electrode plate for lead-acid battery
US09878973 US6385829B2 (en) 1999-01-21 2001-06-13 Manufacturing method for a lead-acid battery electrode plate
US20010042288A1 true US20010042288A1 (en) 2001-11-22
US6385829B2 true US6385829B2 (en) 2002-05-14
ID=27280321
US09488639 Active US6338919B1 (en) 1999-01-21 2000-01-21 Electrode plate for lead-acid battery
US09878973 Expired - Fee Related US6385829B2 (en) 1999-01-21 2001-06-13 Manufacturing method for a lead-acid battery electrode plate
US (2) US6338919B1 (en)
EP (1) EP1022791B1 (en)
DE (2) DE60005413T2 (en)
JP4831269B2 (en) * 2000-03-17 2011-12-07 ソニー株式会社 Method for producing a battery
US7159805B2 (en) 2002-03-25 2007-01-09 Evanite Fiber Corporation Methods of modifying fibers
US6929858B2 (en) 2002-03-25 2005-08-16 Squannacook Technologies Llc Glass fibers
US7846574B2 (en) * 2004-08-27 2010-12-07 Panosonic Corporation Positive electrode plate for alkaline storage battery and method for producing the same
KR20080058772A (en) * 2006-12-22 2008-06-26 에스케이에너지 주식회사 Manufacturing method of electrode for battery
US20100216021A1 (en) * 2007-06-19 2010-08-26 Rhodri Evans Electrode plate
DE102008055775A1 (en) * 2008-11-04 2010-05-06 Vb Autobatterie Gmbh & Co. Kgaa Electrode for an accumulator
CN102157720B (en) * 2010-12-31 2013-01-30 东莞市飞新达精密机械科技有限公司 Forming machining method of battery pole piece
CN102513443A (en) * 2011-12-09 2012-06-27 深圳市雄韬电源科技股份有限公司 Method for processing punched grids of lead-acid accumulators
DE102012102461B4 (en) * 2012-03-22 2013-10-10 Vb Autobatterie Gmbh & Co. Kgaa A process for the manufacture of electrodes for lead-acid batteries, lead-acid battery electrode and then prepared
CN102709507B (en) * 2012-06-18 2014-04-09 林子进 High-lead-ion-energy polar plate
US20140050956A1 (en) * 2012-08-15 2014-02-20 Dijiya Energy Saving Technology Inc. Single winding core, lithium cell with single winding core and successive winding method for single winding core
CN103624158B (en) * 2013-11-17 2015-10-21 保定金阳光能源装备科技有限公司 A lead acid battery grid curved plate multi-position into the stamping die
US4271586A (en) 1979-08-27 1981-06-09 General Motors Corporation Method of making battery plates
JPS5818875A (en) 1981-07-24 1983-02-03 Japan Storage Battery Co Ltd Lead storage battery prepared by use of expanded grids
JPS58133271A (en) 1982-02-02 1983-08-08 Toyo Rubber Chemical Ind Co Production of ball
JPS60185365A (en) 1984-03-01 1985-09-20 Furukawa Battery Co Ltd:The Manufacture of substrate for storage battery plate
JPH02267864A (en) 1989-04-07 1990-11-01 Yuasa Battery Co Ltd Storage battery electrode plate and its manufacture
EP0682378A1 (en) 1992-12-28 1995-11-15 Yuasa Corporation Expanded net, method for its manufacture, and plate for lead storage battery
US5762654A (en) 1996-10-08 1998-06-09 Gnb Technologies, Inc. Method for making lead-acid grids and cells and batteries using such grids
JPS58133271U (en) * 1982-03-04 1983-09-08
DE60005413D1 (en) 2003-10-30 grant
EP1022791A3 (en) 2000-11-15 application
EP1022791A2 (en) 2000-07-26 application
EP1022791B1 (en) 2003-09-24 grant
US20010042288A1 (en) 2001-11-22 application
US6338919B1 (en) 2002-01-15 grant
DE60005413T2 (en) 2004-09-16 grant
US6582855B1 (en) 2003-06-24 Current collector substrate in electrode for use in alkaline secondary battery, electrode using the same, and alkaline secondary battery having incorporated thereinto the electrode
US20030148174A1 (en) 2003-08-07 Battery unit, lithium polymer battery using the same, and method for manufacturing lithium polymer battery
US20080241647A1 (en) 2008-10-02 Cylindrical lithium secondary battery
US20070072083A1 (en) 2007-03-29 Electrode for lithium ion secondary batteries, lithium ion secondary battery using the same, and method for manufacturing the battery
US5691087A (en) 1997-11-25 Sealed lead-acid cells and batteries
US6180286B1 (en) 2001-01-30 Lead-acid cells and batteries
US5434025A (en) 1995-07-18 Battery grids and plates and lead-acid batteries made using such grids and plates
US5874186A (en) 1999-02-23 Lead-acid cells and batteries
US5948566A (en) 1999-09-07 Method for making lead-acid grids and cells and batteries using such grids
JPH08170126A (en) 1996-07-02 Porous metallic body, its production and plate for battery using the same
JP2004127561A (en) 2004-04-22 Micro-patterned thin film electrode and lithium secondary battery using the same as negative electrode
US5652074A (en) 1997-07-29 Battery grids, a method for making such battery grids and lead-acid batteries using such battery grids
JPH09115523A (en) 1997-05-02 Nonaqueous electrolytic secondary battery
US5496663A (en) 1996-03-05 Lithium ion battery with lithium vanadium pentoxide positive electrode
EP0696823A1 (en) 1996-02-14 Hydrogen absorbing electrode and production method thereof
US5762654A (en) 1998-06-09 Method for making lead-acid grids and cells and batteries using such grids
EP0814525A2 (en) 1997-12-29 Electrode plate for nonaqueous electrolyte battery, method of manufacture and apparatus
JP2005038773A (en) 2005-02-10 Sealed type battery with cleavage groove
US20040002006A1 (en) 2004-01-01 Battery including carbon foam current collectors
US20060240323A1 (en) 2006-10-26 Storage battery manufacturing method which uses a polar plate having a foamed-metal electrode substrate and joins a current collector to the electrode substrate, and storage battery obtained through the manufacturing method
US4507856A (en) 1985-04-02 Method of assembling multicell electric storage batteries
JP2003187774A (en) 2003-07-04 Safety valve of battery
US20100192362A1 (en) 2010-08-05 Split Charge Forming Process for Battery
JP2000021452A (en) 2000-01-21 Nonaqueous electrolyte secondary battery
2010-05-14 LAPS Lapse for failure to pay maintenance fees