JPH1145737A - Lead-acid battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage battery which has a satisfactory function of anchor bond and has good vibration proof, by opening a part contacting with the lower end of a plate of a separator which includes the lower end of the plate, and filling a adhesive between the bottom of a plate group and the bottom in a battery jar. SOLUTION: A separator 3 of a retainer mat is bent in a U-shaped and sandwiches a positive plate 1, and slits 6 are provided at two points in a part contacting the bottom part of a plate. A prescribed amount of un-hardened epoxy resin as a filling adhesive 4 is injected into a battery jar 5, a plate group is inserted into the battery jar, cells are connected to each other, a lid is mounted, a pole column is adhered to the lid, then, the epoxy resin is hardened, and the plate group is fixed to the battery jar 5. A shape of opening of the separator 3 is not limited to slit 6, and may be any shape such that the filled adhesive 6 contacts the plate. Even if an opening is provided in the separator 3 the opening is sealed with the adhesive 6, therefore, function provided from bag-shaped and U-shaped structures is kept without damaging.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in vibration resistance of a lead storage battery.

[0002]

2. Description of the Related Art In recent years, lead storage batteries have come to be used for applications with large vibrations and shocks, such as for electric vehicles and motor sports. When used in such applications, as a method to improve the vibration resistance of the battery, a gap between the lower part of the electrode group and the lower part in the battery case is filled with a filling adhesive such as epoxy resin. Attempts have been made to use a so-called anchor bond for fixing the electrode group and the battery case by polymerization and curing.

[0003] The reason for using anchor bonds is that the electrode group of a lead-acid battery is integrated with a pole made of lead alloy or a connecting part between cells. Fixed on top of lid or cell spacing wall. Therefore, the electrode group is assembled in a suspended state, and about 60% to 85% of the weight of the storage battery is the weight of the electrode group.

[0004] Therefore, when strong vibration or impact is applied, the base of the pole lug welded to the pole, the connection between cells, or the strap may cause metal fatigue and break.

On the other hand, with the spread of expanded electrode plates and retainer-type sealed storage batteries, bag-shaped separators and U-shaped separators are used in these storage batteries.

[0006]

However, in an electrode group using a U-shaped separator, the lower end of either the positive or negative electrode plate wrapped by the separator cannot contact the resin by the separator. In addition, only the positive or negative electrode plate is fixed to the battery case, and there is a problem that the effect of the anchor bond is not sufficiently exhibited.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a separator having a structure enclosing the lower end of an electrode plate, the portion of which is in contact with the lower end of the electrode plate. It is characterized in that a filling adhesive is filled between the bottom and the inner bottom of the battery case.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described by way of an embodiment applied to a retainer type sealed lead-acid battery.

FIG. 1 is a schematic diagram showing the present embodiment.
Reference numeral 1 denotes an anode plate, 2 denotes a cathode plate, and 3 denotes a separator of a retainer mat, which is bent in a U-shape to sandwich the anode plate, and has slits 6 at two positions in contact with the lower end of the electrode plate.
5 is a battery case, 4 is an epoxy resin, a predetermined amount of uncured resin is put into the battery case, an electrode plate group is inserted, connection between cells, mounting of a lid, and fixing of a pole and a lid. After that, the epoxy resin is cured to fix the electrode plate group and the battery case.

[0010] A 12V battery having a capacity of 5 amps and a capacity of 50 amp-hours was manufactured using 9 anode plates and 10 cathode plates per cell. The electrolytic solution was prepared by adding diluted sulfuric acid having a specific gravity of 1.300 to 500〓.
Injected.

As batteries for comparison, a battery having no separator provided in the separator (hereinafter referred to as A battery) and a battery having no separator provided in the separator and not filled with epoxy resin (hereinafter referred to as B battery) were produced. The amount of the electrolytic solution of the B battery was increased by injecting an amount of the liquid equivalent to the amount of the epoxy resin.

[0012] These batteries were subjected to a vibration test. Vibration condition at this time, at an acceleration of 15G while discharging at 0.2 CA (10 amps), frequency 100H from 10H _{Z Z}
The interval is swept in 20 minutes. as a result,
Battery B caused a significant voltage drop in 35 minutes and Battery A
Caused a similar voltage drop at 1 hour 41 minutes. However, the battery of the present invention could be discharged without abnormality until the entire battery capacity was discharged (time required: 5 hours and 10 minutes). A significant voltage drop is a measure of disconnection inside the battery.

When these batteries were disassembled, batteries A and B
Was broken at the connection between the cells. On the other hand, no abnormality was observed in the batteries of the examples of the present invention.

Although the opening of the separator of this embodiment employs a slit, the shape of the opening is not limited as long as the filler substantially contacts the electrode plate.

Similar results were obtained for a liquid storage battery using a bag-shaped separator.

The bag-shaped or U-shaped separator has an effective shape for preventing short-circuiting due to the active material dropped from the electrode plate. Is closed by the filler, so that the function of the bag or U-shape is not impaired.

[0017]

According to the storage battery of the present invention, it is possible to provide a lead storage battery exhibiting an anchor bond function sufficiently and having excellent vibration resistance.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a sealed lead-acid battery according to the present invention.

[Explanation of symbols]

 1. 1. positive electrode plate Negative electrode plate 3. Separator 4. Fillable adhesive 5. Battery case 6. slit

Claims (1)

[Claims] In a lead storage battery, a portion of a separator having a structure surrounding a lower end portion of an electrode plate is opened at a portion abutting on a lower end portion of the electrode plate. A lead storage battery characterized by being filled with an agent.