JP2019200970A - Lead battery - Google Patents

Abstract

To provide a lead battery capable of improving a torque life.SOLUTION: A lead battery 1 comprises: an electrode plate group 4; and an array shift suppression member 31. The electrode plate group 4 is formed by arranging a plurality of electrode plate units 20 having a positive electrode plate 9, a negative electrode plate 10, and a retainer 11 arranged between the positive electrode plate 9 and the negative electrode plate 10. The array shift suppression member 31 is attached to the electrode plate group 4 and suppresses an array shift of the electrode plate group 4.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lead acid battery.

  There is known a lead storage battery including an electrode plate group having a structure in which a positive electrode plate and a negative electrode plate are alternately stacked via a retainer (for example, see Patent Document 1). In such a lead storage battery, the ears of the polar plates of the same polarity are connected by a strap. The electrode plate group is accommodated in the battery case in a state of being pressurized in the stacking direction of the electrode plates.

Japanese Patent Laid-Open No. 2006-162611

  In the lead storage battery as described above, the electrode plate may be deformed due to, for example, corrosion. In this case, the internal resistance may increase and the trickle life may be reduced.

  Then, an object of this invention is to provide the lead storage battery which can improve a trickle lifetime.

  A lead storage battery according to the present invention includes a positive electrode plate, a negative electrode plate, a positive electrode plate group including a plurality of electrode plate units having a retainer disposed between the positive electrode plate and the negative electrode plate, and an electrode plate attached to the electrode plate group. A misalignment suppressing member that suppresses misalignment of the group.

  In this lead storage battery, deformation of the positive electrode plate and the negative electrode plate can be suppressed by the alignment deviation suppressing member. As a result, an increase in internal resistance can be suppressed and the trickle life can be improved. Furthermore, vibration resistance can be improved.

  In the lead storage battery according to the present invention, the arrangement deviation suppressing member may be a member that tightly binds the electrode plate group. In this configuration, the electrode group can be combined into one while being pressed by the arrangement deviation suppressing member.

  In the lead storage battery according to the present invention, the misalignment suppressing member may be an acid resistant film or clip. According to this configuration, it is possible to effectively suppress misalignment of the electrode plate group using an acid-resistant film or clip.

  The lead acid battery according to the present invention may be used in a motorcycle. In this case, in the motorcycle, the vibration is often increased, and the above-described effect of improving the vibration resistance is effectively exhibited.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the lead storage battery which can improve a trickle lifetime. Furthermore, the vibration resistance of the lead storage battery can be improved.

FIG. 1 is an exploded perspective view showing a lead-acid battery according to an embodiment. FIG. 2 is a side view showing an electrode plate group according to an embodiment. FIG. 3 is a graph showing the results of the life test. Fig.4 (a) is a side view of the electrode group which concerns on a modification. FIG. 4B is a side view of an electrode plate group according to another modification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

<Lead battery>
As shown in FIG. 1, the lead storage battery 1 includes a battery case 2 whose upper surface is open, a lid 3 that closes the opening of the battery case 2, and an electrode plate group 4. The lead acid battery 1 is a control valve type lead acid battery in which there is no free electrolyte flowing inside. The lead storage battery 1 is used for a motorcycle, for example. In the following description, the direction in which the lid 3 is located is “up” for convenience.

  The battery case 2 and the lid 3 are made of, for example, polypropylene (PP), ABS, and polyphenylene ether (PPE). The lid 3 is provided with a positive electrode terminal 5, a negative electrode terminal 6, and a control valve 7 for discharging excess gas out of the battery case 2. An electrode plate group 4 is accommodated inside the battery case 2.

  As shown in FIGS. 1 and 2, the electrode plate group 4 includes a plurality of electrode plate units 20 arranged. The electrode plate unit 20 includes a positive electrode plate 9, a negative electrode plate 10, and a retainer 11 disposed between the positive electrode plate 9 and the negative electrode plate 10. The plurality of electrode plate units 20 are stacked so as to overlap in the thickness direction. In other words, the electrode plate group 4 has a structure in which the positive electrode plates 9 and the negative electrode plates 10 are alternately stacked via the retainers 11.

  The positive electrode plate 9 and the negative electrode plate 10 are arranged so that their main surfaces are perpendicular to the opening surface of the battery case 2. In the electrode plate group 4, the ears 23 included in each of the positive electrode grid bodies 12 in the plurality of positive electrode plates 9 are integrally welded with a positive electrode strap 16. Similarly, the ears 23 of the negative electrode grid bodies 14 in the plurality of negative electrode plates 10 are integrally welded with the negative electrode strap 17. The positive strap 16 is connected to the positive terminal 5 through the positive pole 18. The negative strap 17 is connected to the negative terminal 6 via the negative pole 19.

  The positive electrode plate 9 includes a positive electrode lattice body 12 and a positive electrode material 13 filled in the positive electrode lattice body 12. The positive grid 12 is a grid used for the positive plate 9 of the lead storage battery 1. The positive electrode grid 12 is made of, for example, a lead alloy containing lead as a main component. The lead alloy may contain one or more elements of antimony, tin, calcium, and aluminum as components other than lead. The lead alloy may further contain, for example, at least one of bismuth and silver. The positive electrode material 13 includes a positive electrode active material, an additive, and the like. Examples of the positive electrode active material include lead dioxide. Examples of the additive include carbon materials and reinforcing short fibers.

  The negative electrode plate 10 includes a negative electrode lattice body 14 and a negative electrode material 15 filled in the negative electrode lattice body 14. The negative electrode grid 14 is a grid used for the negative electrode plate 10 of the lead storage battery 1. The negative electrode grid 14 is made of, for example, a lead alloy containing lead as a main component. The lead alloy may contain one or more elements of antimony, tin, calcium, and aluminum as components other than lead. The lead alloy may further contain, for example, at least one of bismuth and silver. The negative electrode material 15 includes a negative electrode active material, an additive, and the like. Examples of the negative electrode active material include spongylead. Examples of the additive include barium sulfate, a carbon material, and reinforcing short fibers.

  The retainer 11 is an electrolytic solution holding body that holds an electrolytic solution. The retainer 11 holds the electrolytic solution and allows sulfate ions and hydrogen ions (protons) to pass through while preventing electrical contact between the positive electrode plate 9 and the negative electrode plate 10. The retainer 11 is, for example, an AGM (Absorbed Glass Mat) obtained by making fine glass fibers (cotton). The retainer 11 has a plate shape, but may have a bag shape that can wrap the positive electrode plate 9, for example. The electrolytic solution is, for example, dilute sulfuric acid. The electrolytic solution may contain aluminum ions. The electrolytic solution may be contained not only in the retainer 11 but also in the positive electrode plate 9 and the negative electrode plate 10.

  In the present embodiment, the lead storage battery 1 includes a misalignment suppressing member 31. The misalignment suppressing member 31 suppresses misalignment of the electrode plate group 4. The misalignment suppressing member 31 is an acid resistant (oxidation resistant) film. Here, the misalignment suppressing member 31 is a heat shrink film mainly composed of polyolefin having excellent acid resistance.

  The misalignment suppressing member 31 is attached to the electrode plate group 4. Specifically, the alignment deviation suppressing member 31 has a band shape or a string shape, and is wound around the electrode plate group 4 so as to surround the electrode plate group 4. The misalignment suppressing member 31 is a member that binds the electrode plate group 4 together. The misalignment suppressing member 31 is attached to the central portion of the electrode plate group 4 in the vertical direction. The misalignment suppressing member 31 is, for example, a band having a width of 250 mm and a thickness of 15 μm. The misalignment suppressing member 31 applies a predetermined tightening pressure to the electrode plate group 4.

<Method for producing lead-acid battery>
Next, the manufacturing method of the lead acid battery 1 is demonstrated.

  First, paste-like positive electrode material 13 and negative electrode material 15 are kneaded onto the positive electrode grid body 12 and the negative electrode grid body 14, respectively, and the unformed positive electrode plate 9 and negative electrode plate 10 are obtained. The unformed positive electrode plate 9 and the negative electrode plate 10 are laminated via the retainer 11 to produce the electrode plate unit 20. A plurality of electrode plate units 20 are arranged to obtain the electrode plate group 4.

  Subsequently, the alignment deviation suppressing member 31 is wound around the electrode plate group 4 and the electrode plate group 4 is tightly bound. The ears 23 of the positive electrode grid 12 are connected by the positive strap 16, and the ears 23 of the negative grid 14 are connected by the negative strap 17. The electrode plate group 4 is accommodated in the battery case 2, and the lid 3 is attached to the battery case 2 by heat fusion or adhesion using an adhesive. The electrolytic solution is injected into the battery case 2 from the upper control valve 7 and a direct current is applied to perform battery case formation. The lead storage battery 1 is obtained by the above.

  As described above, in the lead storage battery 1, the misalignment suppressing member 31 is attached to the electrode plate group 4. Thereby, it can suppress that the positive electrode plate 9 and the negative electrode plate 10 deform | transform by corrosion (for example, the positive electrode grid body 12 and the negative electrode grid body 14 extend). An increase in internal resistance can be suppressed, and the stability of the internal resistance can be increased. The trickle life can be improved. The trickle life is a life under trickle charge which is a charging method for maintaining full charge by continuously applying a weak current. As the trickle life, for example, JIS C 8702-1 can be referred to.

  Furthermore, since the arrangement | sequence deviation suppression member 31 is attached to the electrode group 4, it becomes possible to improve the vibration resistance of the lead acid battery 1. Moreover, before the positive electrode strap 16 and the negative electrode strap 17 are connected, the handling property of the electrode plate group 4 can be enhanced, and the rotation of the positive electrode plate 9 and the negative electrode plate 10 can be suppressed. When the positive strap 16 and the negative strap 17 are connected, the connection can be easily performed.

  In the lead storage battery 1, the misalignment suppressing member 31 is a member that binds the electrode plate group 4 together. Thereby, the electrode group 4 can be put together while being pressed. The effect of suppressing the deformation of the positive electrode plate 9 and the negative electrode plate 10 is remarkable.

  In the lead storage battery 1, the misalignment suppressing member 31 is an acid resistant film. Thereby, the arrangement | sequence shift | offset | difference of the electrode group 4 can be effectively suppressed using an acid-resistant film.

  The lead storage battery 1 is used in a motorcycle. In this case, in the motorcycle, the vibration is often increased, and the above-described effect of improving the vibration resistance is effectively exhibited. When the suspension of the motorcycle is weak, the above-described effect of improving the vibration resistance is more effectively exhibited.

<Life test>
About Examples 1-3 and Comparative Examples 1-3, the life test which measures a trickle life was implemented. The result of the life test is shown in FIG. In the life test, the test temperature was 65 ° C., the set voltage was 2.23 V, and the capacity was confirmed every 48 days (equivalent to 2 years). The capacity confirmation conditions were a 10-hour rate and a final voltage of 1.8V. Examples 1 to 3 are lead acid batteries corresponding to the lead acid battery 1. Comparative Examples 1 to 3 are lead storage batteries similar to the lead storage battery 1 except that the arrangement deviation suppressing member 31 is not provided. In the graph in FIG. 3, the vertical axis represents the capacity retention rate, and the horizontal axis represents the trickle life. The trickle life was defined as the number of years converted to 25 ° C. The capacity maintenance rate for determining the lifetime was 80%. As shown in FIG. 3, it can be confirmed that Examples 1 to 3 have improved trickle life compared to Comparative Examples 1 to 3.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment.

  In the said embodiment, the position and range in which the arrangement | sequence deviation suppression member 31 is attached to the electrode group 4 are not specifically limited, It is good also as all positions and ranges. For example, as shown in FIG. 4A, an alignment deviation suppressing member 41 is attached to the lower part of the electrode plate group 4, and an arrangement deviation suppressing member 42 is attached to the center in the vertical direction of the electrode plate group 4. The misalignment suppressing member 43 may be attached to the upper part of the group 4. The misalignment suppressing members 41 to 43 are configured in the same manner as the misalignment suppressing member 31. In this case, deformation of the positive electrode plate 9 and the negative electrode plate 10 can be reliably suppressed.

  Further, for example, as shown in FIG. 4B, the alignment deviation suppressing member 51 may be attached only to the lower part of the electrode plate group 4. The misalignment suppressing member 51 is configured in the same manner as the misalignment suppressing member 31. In this case, since the misalignment suppressing member 51 is attached to the lower part, it is possible to avoid the misalignment suppressing member 51 from interfering with the injection of the electrolytic solution from the upper control valve 7.

  In the said embodiment, the thickness of the arrangement | sequence deviation suppression member 31 is not specifically limited, It is good also as various thickness. In the above embodiment, the tightening pressure applied to the electrode plate group 4 by the misalignment suppressing member 31 is not particularly limited, and may be various tightening pressures. In the embodiment described above, the misalignment suppressing member 31 may be an acid resistant clip. The lead acid battery according to the present invention is not limited to a motorcycle, but may be a stationary one, and can be used for various applications. At least some of the plurality of ears 23 in the electrode plate group 4 may be not parallel to each other but parallel to each other.

  DESCRIPTION OF SYMBOLS 1 ... Lead storage battery, 4 ... Electrode plate group, 9 ... Positive electrode plate, 10 ... Negative electrode plate, 11 ... Retainer, 20 ... Electrode plate unit, 31, 41, 42, 43, 51 ... Arrangement | positioning deviation suppression member.

Claims (4)

An electrode plate group in which a plurality of electrode plate units each having a positive electrode plate, a negative electrode plate, and a retainer disposed between the positive electrode plate and the negative electrode plate are arranged;
A lead storage battery, comprising: an alignment shift suppressing member that is attached to the electrode plate group and suppresses an alignment shift of the electrode plate group.   The lead storage battery according to claim 1, wherein the misalignment suppressing member is a member that binds the electrode plate group together.   The lead acid battery according to claim 1, wherein the misalignment suppressing member is an acid-resistant film or clip.   The lead acid battery as described in any one of Claims 1-3 used for a motorcycle.

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