JP2005050699A - Lead-acid storage battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lead-acid storage battery aiming at safety of a user by preventing a tap of liquid injection port from being imprudently removed by the user, without increasing the height of a space for housing, which can be mounted on an automobile by using a commonly used stay. <P>SOLUTION: A concave face 2 is formed on an upper face 1 of a lid of a battery case B2, a liquid injection port 3 is formed in the concave face 2, and a liquid injection cylinder 4 is extended downward from an outer periphery of the liquid injection port 3, and a tap of liquid injection port 5 is arranged in the liquid injection cylinder 4. The liquid injection port 3 is closed by housing and putting a lid plate 6 in the concave face 2 so as not to protrude upward from the upper face 1 of the lid of battery case B2, and the lid plate is fixed to the concave face 2 by welding 7 or the like. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a so-called maintenance-free lead storage battery that does not require replenishment.

As a maintenance-free lead-acid battery, a large amount of electrolytic solution is poured so that the electrode plate group is housed in the battery case and the electrode plate group is immersed. At this time, in order to prevent leakage due to the scattering of the gas and electrolyte generated by the charge / discharge reaction of the storage battery, a liquid stopper plug cylinder was extended directly under the liquid injection port formed on the upper surface of the lid on the battery case. And mounting the liquid spigot equipped with a filter made of a splash proof plate or porous ceramic on the liquid spigot mounting cylinder so that the head is at the same level as the upper surface of the battery case lid, The liquid mist containing the generated gas is removed and safely released slowly to the outside, and the electrolyte is prevented from leaking out. In the conventional lead-acid battery, when the electrolytic solution in the battery case is reduced during use, it is normal to remove the liquid stopper and replenish with purified water.
However, in recent years, improvements in this type of lead-acid battery have led to the development of a virtually maintenance-free lead-acid battery that has almost no decrease in electrolyte and has excellent liquid-reducing properties that do not require replenishment until the end of the battery life. .

  Even for lead-acid batteries that do not require such replenisher, the liquid spigot can be freely removed as with conventional lead-acid batteries. Excessive electrolyte overflows from the injection port, and the splashes cause damage to the user's clothes. In particular, in the lead storage battery in which the distance between the electrode plate group and the back surface of the battery case lid is extremely narrowed in order to increase the capacity and output of the lead storage battery, the above problem is more likely to occur.

Japanese Patent Application Laid-Open No. 8-203498 discloses an invention for solving the above problems.
That is, the invention described in the publication describes the liquid port that is irreversibly attached to the battery lid 2 at the stage of delivery to a battery dealer of a lead storage battery that includes the liquid port plug 5 attached to the battery case lid 2. Delivered with a cover 3 for covering the stopper 5, the battery seller enables maintenance of the lead-acid battery and irreversibly attaches the cover, then sells it, and the user forcibly removes the cover. Since it does not come off unless it is broken, the injection stopper is removed so that the clothes and the like are not damaged by the splash of the electrolyte, etc. The structure of the cover 3 is as shown in FIGS. When the undercut-shaped projections 6 provided on both ends of the bottomless rectangular cover 3 covering all the liquid spouts are fitted into the notches 7 provided on the upper surface of the battery case lid 3, In the state where the undercut portion of the protrusion 6 is caught in the notch 7 Because it is Attach, then, to prevent it from being removed pulling the undercut-shaped projections 6, in which the user has to no longer be maintained by easily remove the said cover lid.
JP-A-8-203498

In the invention disclosed in the above Japanese Patent Laid-Open No. 8-203498, the cover is attached in a state of protruding from the upper surface of the battery case cover, so that the space for accommodating the lead storage battery is larger than that of a normal lead storage battery having a flat upper surface. In addition, the U-shaped stay that is usually used cannot be used when installing and fixing to an automobile, and a specially shaped stay suitable for installation must be created and used. There is an inconvenience.
The present invention solves such a problem, the height of the lead-acid battery is not different from the conventional one, it is sufficient that there is a storage space having a normal height space, and it is generally used for installation in an automobile. Another object of the present invention is to provide a lead-acid battery that provides the convenience of being able to use a U-shaped stay and further eliminates the maintenance work of the battery dealer and the installation work of the cover.

The present invention relates to a lead-acid battery that achieves the above-mentioned object, wherein a concave surface is formed on the upper surface of the battery case lid, a liquid injection port is provided in the concave surface, and a liquid injection cylinder is dropped from the periphery of the liquid injection port. The liquid stopper is extended and attached to the liquid injection cylinder, while the lid is accommodated and placed in the concave surface so as not to protrude upward from the upper surface of the battery case cover, thereby closing the liquid stopper. At the same time, it is characterized in that it is fixed to the battery case lid by fusion or adhesion to the concave surface.
Furthermore, the present invention provides a lead storage battery in which an exhaust hole is formed in the cover plate and a filter that closes the exhaust hole is provided on the back surface of the battery, which is accommodated and placed in a long rectangular concave surface. The four peripheral edges of the cover plate are fixed to the concave surface by fusion or adhesion, and a long rectangular exhaust space communicating with all the liquid spouts is formed below the cover plate.

According to the first aspect of the present invention, the user cannot play the cover plate from the concave surface for maintenance because of mischief. In addition to being able to prevent dangers such as contamination, the lid plate is accommodated in the concave surface and does not protrude upward from the upper surface of the battery case lid. Since it is the same height as the storage battery, it eliminates the inconvenience due to the increase in the height space seen in the lead storage battery with the lid cover protruding from the upper surface of the conventional battery case cover. The same general stay as that of the lead acid battery can be installed, and the inconvenience of preparing a specially shaped stay like the conventional lead acid battery can be eliminated.
According to the invention of claim 2, not only the same effect as that of the invention of claim 1 is brought about for all the liquid plugs, but also the gas exhausted from all the liquid plugs is combined with one filter. The liquid mist contained through one exhaust hole can be removed and discharged to the outside at once.

  1 to 3 show a lead storage battery according to an embodiment of the present invention. FIG. 1 is a perspective view of the lead storage battery B. FIG. The lead storage battery B is a monoblock lead storage battery consisting of 6 cells C. The battery case B1 is made of a thermoplastic synthetic resin made of polypropylene or the like, and the inside thereof is divided into 6 cell chambers by partition walls. In each cell chamber, electrode plate groups are housed, these electrode plate groups are connected in series, and a negative electrode terminal pole column and a positive electrode terminal pole column stand upright from the straps at both ends thereof, and the upper ends of the respective electrode chambers. The part penetrates the battery case lid B2 applied to the battery case B1, and constitutes a positive electrode terminal P and a negative electrode terminal N, respectively. The battery case lid B2 is made of the same synthetic resin as the battery case B1, and the four side walls and the partition wall partitioning the back space into six are fixed to the corresponding four side walls and the partition wall of the battery case B1 by heat sealing or the like. Has been.

The above configuration is the same as the conventional lead storage battery. In this configuration, the basic invention of the present application is that a concave surface 2 is formed on the upper surface 1 of the battery case lid B2, a liquid injection port 3 is provided in the concave surface 2, and the liquid injection port 3 is suspended from the periphery. The liquid injection cylinder 4 is extended, and a liquid stopper 5 is screwed into the liquid injection cylinder 4 while a lid plate 6 made of a thermoplastic synthetic resin such as polypropylene is installed in the concave surface 2. The liquid injection port 3 is closed and accommodated so as not to protrude upward from the upper surface 1 of the tank lid B2, and the lid plate 6 is partially fused to the concave surface 2 by heat sealing or ultrasonic heating. It exists in adhering to this battery case lid B2 by adhesion | attachment. In the drawing, reference numeral 7 denotes a fixing portion by fusion or the like. The lid plate 6 is preferably made of a synthetic resin material made of the same material as the battery case lid B2.
Thus, since the lid plate 6 cannot be removed from the battery case lid B2, the above-mentioned inconvenience caused by the user's mischievous removal of the liquid stopper 5 below the liquid inlet 3 can be solved, and the above-described problem can be solved. The effect specific to the present invention is brought about.

  In this case, when the exhaust space 8 is provided between the liquid injection stopper 4 and the lid plate 6 above the liquid stopper 5 mounted in the liquid injection cylinder 4, the exhaust from the liquid stopper 5 is smoothly performed. It is general and preferable to ensure a good level. Thus, as will be described later, the exhausted gas is discharged to the outside through gaps 9, 9,... Between the opposed surfaces of the cover plate 6 and the concave surface 2 that are not fused or bonded.

  FIGS. 1 to 3 show such a basic invention applied to a monoblock type lead-acid battery B consisting of 6 cells, and the concave surface 2 formed on the upper surface 1 of the battery case lid B2 is an elongated rectangular battery. A long rectangular concave surface 2 having a desired width and a length spanning six cell chambers on the central axis of the width of the tank lid B2 is formed, and a desired surface is formed on the bottom surface of the concave surface 2 at the center of each cell chamber. The circular liquid injection ports 3 having a diameter are arranged in a row, and the liquid injection cylinders 4 are extended from the concave surface 2 on the outer periphery of each liquid injection hole 3, On the lower side, that is, located below the liquid injection port 3, a screw thread 4 a is provided on the inner peripheral surface thereof, and a certain amount of electrolyte is supplied from each liquid injection port 3, 3. After the liquid injection, the liquid spigot 5 was screwed and attached to the screw cylinder part 4a having the screw thread of each liquid injection cylinder 4 by the screw thread part 5a formed on the outer periphery of the cylindrical part. Thereafter, a long rectangular lid plate 6 that is suitable for just fitting to the long rectangular concave surface 2 and has a thickness substantially the same as the depth of the concave surface 2 is received and placed in the concave surface 2 of the long rectangular shape. The upper surface of the six liquid injection ports 3, 3,... Arranged side by side is closed, and the four peripheral edges 6a of the lid plate 6 and the concave surface 2 on which the four peripheral edges 6a are placed and enclosed are L-shaped. The surface 2a is partially fused 7 by, for example, heat sealing, and the lid plate 6 is fixed to the concave surface 2, that is, the battery case lid B2. Thus, since the user cannot remove the cover plate 6 from the concave surface 2, the user inadvertently removes the liquid injection stoppers 5, 5... Attached to the liquid injection ports 3, 3. You can completely eliminate the fear. Further, since the cover plate 6 is in the same plane as the upper surface 1 of the battery case cover B2, it is possible to secure a height that is the same as the height of a general lead-acid battery, and it is advantageous that it can be installed using a general stay. . ,

  In the illustrated example, all of the six liquid injection ports 3, 3,..., And therefore the liquid injection stoppers 5, 5,. All of them were closed, and the closing operation was most easily and efficiently performed. However, a plurality of short lid plates were prepared depending on the length of the concave groove, and six liquid injection ports 3, 3, All of ... may be closed.

Each liquid stopper 5 has a plurality of baffle plates 5b in the hollow portion in the cylindrical portion, and an exhaust hole 5d is formed in the center of the head portion 5c. The flat portion of the head portion 5c is flat. Although not shown, the upper surface of the surface has a notch for engaging a + or − driver as is well known. Each of the liquid injection ports 3 is formed in advance with a diameter sufficient to pass through the head portion 5c of the liquid spout 5. Thus, when the threaded portion 5a of the liquid spout 5 inserted from each liquid filling port 3 and the threaded portion 4a of the liquid injection tube 4 are screwed in, the outer peripheral portion of the head 5c is It is preferable that the upper end surface of the threaded portion 4a of the liquid injection cylinder 4 is sealed in a liquid-tight manner through a packing 10 previously applied.
Thus, the gas generated in each cell chamber in the storage battery flows into each liquid plug 5 while the liquid mist is removed and only the gas is discharged from the exhaust hole 5d of the head 5c. It passes through the gap 9 between the opposed surfaces which are not fused or bonded between the long rectangular lid plate 6 and the concave surface 2 of the long rectangular shape and is discharged to the outside.

In order to improve the exhaust from each of the liquid injection stoppers 5, the upper cylindrical body 4 b of each liquid injection cylinder 4, that is, the height of the cylindrical portion 4 b surrounding each liquid injection port 3 and extending downward from the concave surface 2. The exhaust space 8 having a sufficient height is formed between the upper surface of the head portion 5c of the liquid spigot 5 and the lower surface of the lid plate 6 placed on the concave surface 2. preferable. Thus, the gas generated in each cell chamber of the monoblock type lead-acid battery is smoothly and satisfactorily discharged from each liquid plug 5 to the exhaust space 8 and then discharged to the outside through the opposing gap 9.
In FIG. 1, the side surface of the lid plate 6 and the four circumferential side surfaces of the concave surface 2 facing this are partially fused 9. However, in terms of appearance, the back surface of the lid plate 6 and the bottom surface of the concave surface 2 facing it. May be partially fused. Further, instead of fusion, it may be fixed by an adhesive.

4 and 5 show a storage battery B 'according to another embodiment of the present invention.
In the figure, a long rectangular lid plate 6 'is provided with one exhaust hole 11 in the middle of its length direction, for example, and a filter 12 with the exhaust hole 11 closed on the back surface. It is. Reference numeral 13 denotes a surrounding frame that holds the filter 12. The cover plate 6 'has a long rectangular concave surface 2 formed on the upper surface 1 of the battery case lid B2 on the entire periphery of a four-side protruding frame 6'a protruding downward from the four peripheral edges of the cover plate 6'. Is mounted and mounted so as not to protrude from the upper surface 1 of the battery case lid B2, and is fixed to the L-shaped step surface of the entire peripheral surface of the concave surface 2 by heat fusion 7 '. A common rectangular exhaust space 8 ′ is interposed between the six liquid injection plugs 5, 5,... In line with the back side of the plate 6 ′, Thus, the exhaust from each of the liquid injection stoppers 5, 5,... Was exhausted from the exhaust hole 11 through the filter 12.
In this monoblock type lead-acid battery B ′, the long rectangular lid plate 6 ′ is fused to the four peripheral edges of the concave surface 2 over the entire four peripheral edges 6 ′ a. The fixing of the cover plate 6 'to the battery case cover B2 is obtained more firmly.

The perspective view of the lead acid battery of one example of implementation of this invention. FIG. 2 is a sectional view taken along line II-II in FIG. 1. FIG. 3 is a sectional view taken along line III-III in FIG. 1. The perspective view of the lead acid battery of the other Example of this invention. FIG. 5 is a sectional view taken along line VV in FIG. 4. FIG. 6 is a sectional view taken along line VI-VI in FIG. 4.

Explanation of symbols

B, B 'Lead-acid battery B1 Battery case B2 Battery case cover 1 Upper surface communication tube of battery case cover 2 Concave surface 3 Injection port 4 Injection tube 4a Injection tube installation port 4b Injection tube assembly Head receiving cylinder 5 Liquid plug 6, 6 'Cover plate 7, 7' Fusing, adhering, adhering part 8, 8 'Exhaust space 9 Clearance 11 Exhaust hole of cover plate 12 Filter

Claims (2)

  A concave surface is formed on the upper surface of the battery case lid, a liquid injection port is provided in the concave surface, a liquid injection tube is extended from the periphery of the liquid injection port, and a liquid port plug is mounted in the liquid injection tube. On the other hand, the lid plate is accommodated in the concave surface so as not to protrude upward from the upper surface of the battery case lid to close the liquid stopper, and is fixed to the battery case lid by fusion or adhesion. Lead acid battery characterized by that.   The cover plate is provided with an exhaust hole and a filter that closes the exhaust hole on the back surface of the cover plate. The cover plate is accommodated in a long rectangular concave surface, and the four peripheral edges of the cover plate are fused to the concave surface. 2. The lead-acid battery according to claim 1, wherein a long rectangular exhaust space which is fixed by adhesion or adhesion and communicates with all the liquid spigots is formed thereunder.

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