JP2010192281A - Lead-acid battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lead-acid battery which suppresses breakage of the lead acid battery in a case that ignitable gas accumulated in a battery container is ignited by any fire point, enables to reuse the lead-acid battery, and also secures areas for labeling, forming various display, and mounting a deterioration determination device or the like, on a lid. <P>SOLUTION: The lead-acid battery having a vent plug mounted on a vent, includes at least one of a first elastic member which is in contact with an inner circumference of the vent and an outer circumference of a cylinder part, and a second elastic member pressed in a gap between an outer circumference of a head part and the inner circumference of the vent. As the vent plug is separated from the lid even by impact of hydrogen ignition in the battery, the impact is relieved and breakage of the lid and battery container is suppressed. In addition, it is not necessary to provide a structure for relieving the impact in a place except for the vent plug of the lid, and a space for labeling and arranging the deterioration determining device is secured. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lead-acid battery.

  When the lead storage battery is charged, hydrogen gas and oxygen gas are generated by electrolysis of water in the dilute sulfuric acid electrolyte. These gases are released into the atmosphere from the exhaust port of the liquid plug, but the hydrogen gas and oxygen gas described above remain in the battery case during or immediately after charging. In this situation, for example, when static electricity is applied to the lid or battery case of a lead storage battery, the static electricity enters the inside of the battery via the exhaust port or the gap between the liquid port plug and the lid, and discharge sparks are generated. There was a possibility of generating.

  When such a discharge spark is ignited by hydrogen gas, the battery case or the lid constituting the battery exterior may be deformed or cracked, or the liquid tightness of the joint between the battery case and the lid may be impaired. there were. In particular, in a general liquid type lead acid battery for starting, there is a case where the electrolytic solution is scattered from the crack because the electrolytic solution is abundant.

  Note that such damage to the battery is not only the ignition of hydrogen gas, but also a phenomenon that occurs when, for example, the exhaust port is blocked by dust or foreign matter and the internal pressure of the battery rises abnormally.

  As a technique for suppressing the damage of the battery as described above, for example, in Patent Document 1, a through-hole communicating with the inside and outside of the battery case is provided in the lid of the lead storage battery independently from the liquid port. It is shown that the through-hole is configured to be closed with a closing plate formed of an elastic body, for example. When the internal pressure of the battery rises abnormally due to ignition of hydrogen gas, or when a pressure wave is generated inside the battery, the internal pressure of the battery is decreased or the pressure wave is reduced by removing the blocking plate from the through hole. By escaping to the outside of the battery, the battery case and the lid are prevented from being damaged.

In addition, Patent Document 2 shows a configuration in which a thin portion having a lower strength than other portions is formed on a position above the electrolyte surface, for example, a lid, in order to suppress scattering of the electrolyte when the battery is broken. Yes. And when ignition to hydrogen occurs in the battery, a breakage portion is generated in the lid along the thin wall portion, thereby suppressing further damage to the battery case and the lid, and the breakage portion is Since it is on the surface of the electrolytic solution, scattering of the electrolytic solution can also be suppressed.
Japanese Patent Laid-Open No. 10-64498 US Pat. No. 4,245,010

  According to the configuration of Patent Document 1, although the effect of suppressing breakage of the battery case and the lid can be obtained by removing the closing plate, it has been found that there are the following problems in the implementation.

  In other words, the first issue is to attach a so-called caution label, which expresses handling methods and precautions in terms of words and symbols, from the viewpoint of ensuring product safety and thorough dissemination to consumers. In addition to being required by the IEC standard and the JIS standard that cites it, a label indicating the product number, brand, etc. of the lead storage battery is affixed to the lid, or decoration processing such as embossing, satin or laser In general, various displays are formed directly on the lid surface by the above method. However, in the configuration of Patent Document 1, an area for attaching these labels on the lid or for forming a display is provided. It is extremely difficult to secure.

  In addition, in order to obtain the effect of Patent Document 1, the diameter of the through hole must be greater than a predetermined value. Furthermore, when the label is affixed on the closing plate, the closing plate is detached from the through hole. Since it disappears, the effect of patent document 1 is impaired. Therefore, the area where the label is to be attached must be a narrow area avoiding the liquid stopper and closing plate on the lid, and depending on the type of lead-acid battery, the area for attaching the label is secured on the lid. It was extremely difficult.

  Also, in the case where the display is formed by the above-described various decoration processes instead of performing the display with the label, if the display is formed over the lid and the closure plate, the display area is provided between the closure plate and the lid. Since the boundary line is located, it is not preferable in terms of design or ensuring display visibility. In addition, a dedicated closing plate is required for each through-hole so that the indication on the lid and the indication on the closing plate are continuous, and the indication on the lid is not only attached to the through-hole. Alignment with the display of the closing plate is necessary, which is not preferable in terms of productivity.

  Therefore, even when the display is formed by a technique that does not use a label, it is still necessary to form the display in the area excluding the liquid stopper and the closing plate on the lid, and it is the same as the display by the pasted label. Securing the display area is extremely difficult, and the degree of freedom in designing the display has been significantly impaired. In particular, in a small-capacity lead-acid battery having a small lid area, it is more difficult to secure a display area.

  Furthermore, a deterioration determination device for determining and displaying the deterioration state of the lead storage battery is installed on the lid, or a lead storage battery in which such a deterioration determination device is integrally stored in the lid is known. Even in this case, there should be no interference between the closing plate and the deterioration determining device, as in the case of the above-described label and various displays. Therefore, the configuration of Patent Document 1 has a very low degree of freedom in the mounting position and storage position of the deterioration determination device, as well as difficulty in securing various display areas on the lid. It became a more serious issue.

  Further, as a second problem, in the configuration of Patent Document 2, there is a problem that the lead storage battery cannot be reused because a predetermined position of the lid is irreversibly destroyed. The configuration of Patent Document 2 also has the first problem described above, as in the configuration of Patent Document 1.

  The present invention suppresses structural damage of a lead storage battery caused by hydrogen ignition in the battery, and simultaneously solves the first and second problems described above.

  In order to solve the above-described problems, an invention according to claim 1 of the present invention includes a battery case that accommodates a group of electrode plates, a lid that is attached to the battery case and has a liquid port, and an exhaust. A lead-acid battery in which a liquid mouth plug comprising a head having a mouth and a cylindrical portion that projects downward from the head and has a smaller diameter than the head is attached to the liquid mouth, A lead storage battery comprising at least one of a first elastic member in contact with the outer periphery and the outer periphery of the cylindrical portion, or a second elastic member press-fitted into a gap between the outer periphery of the head and the inner periphery of the liquid port It is shown.

  In the first aspect of the present invention, the liquid spout is attached to the lid via the first elastic member or the second elastic member, and the battery case or the lid is caused by an impact such as hydrogen ignition or an abnormal increase in internal pressure. Before the breakage occurs, the liquid stopper is detached from the lid, thereby preventing the battery case and the lid from being damaged. In addition, since the liquid spout is attached to the lid via the first elastic member or the second elastic member, the liquid spout and the lid do not directly interfere with each other. Will not be damaged by interference with the lid.

  In addition, the first elastic member and / or the second elastic member are temporarily deformed when detached from the lid of the liquid spigot, but both of them are elastic and therefore themselves are damaged. In addition, the liquid stopper and the lid are not deformed.

  Therefore, even if the liquid spout is detached, the lead storage battery can be reused by reattaching the liquid spigot to the lead storage battery, and the second problem described above is solved.

  Depending on each embodiment of the present invention to be described later, when the liquid spout is detached from the lid, the first elastic member or the second elastic member is attached to the liquid spout or attached to the liquid spout. Or in a state where these elastic members are not attached to the liquid spigot or the liquid spout, but in any state, each member will not be damaged. By reattaching the liquid spigot, the lead-acid battery can be reused, and the second problem described above is solved.

  According to the invention of claim 1, in the configuration using the first elastic member, the surface shape of the lid is almost the same as that of the conventional lead storage battery in which the liquid spigot is screwed into the lid. Since the degree of freedom in designing the label attachment position on the lid, the attachment position of the deterioration determination device, or the storage position is not impaired at all, the first problem described above is solved.

  Furthermore, in the first aspect of the invention, in the configuration using the second elastic member, it is necessary to secure a gap in which the second elastic member can be press-fitted in the gap between the head of the liquid stopper and the liquid mouth. If the outer diameter of the head is made small by the gap, the occupied area on the lid surface of the second elastic member will not increase substantially, so that it is the same as the lead storage battery using the first elastic member The first problem is solved.

  Further, it is obvious that the first problem and the second problem can be solved even if the first elastic member and the second elastic member are used in combination, and such a configuration is the invention of claim 1 of the present invention. Is included.

  In the first aspect of the invention, the first elastic member and / or the second elastic member is compressed between the liquid spigot and the liquid spout while the liquid spigot is mounted on the liquid spout. Thus, the liquid plug is held in the liquid port by the frictional force between the first elastic member and / or the second elastic member, the liquid port plug, and the liquid port.

  The invention according to claim 2 of the present invention is the lead storage battery having the configuration of claim 1, comprising the first elastic member, the inner periphery of the liquid port, and the outer periphery of the first elastic member in contact with the inner periphery The lead storage battery is provided with at least one of the first locking means for locking the first elastic member and the second locking means for locking the inner periphery of the first elastic member and the cylindrical portion. .

  In the invention of claim 2, in the state in which the liquid spout is attached to the lid via the first elastic member, in the configuration of the invention of claim 2, when the liquid spout is detached from the lid, most of the In this case, the first elastic member is locked to the liquid port plug or is locked to the liquid port, and the first elastic member can be prevented from dropping from both the liquid port plug and the liquid port. The detachment of the elastic member due to this can be suppressed, and there is an effect that the liquid spigot can be quickly reattached to the lid.

  Note that the first locking means and the second locking means may be used in combination. Since either one is the first elastic member, either one of the first elastic members is elastically deformed, and the liquid stopper is detached from the lid. Note that the locking resistance between the inner periphery of the liquid port by the first locking means and the first elastic member (the tensile force required to pull out the first elastic member from the liquid port) and the cylinder by the second locking means When the liquid spout is detached from the lid depending on the locking resistance (the tensile force required to pull out the liquid spout from the first elastic member) between the outer periphery and the first elastic member, the first locking It is determined whether the means is released or whether the second locking means is released.

  According to a third aspect of the present invention, in the lead-acid battery having the configuration of the second aspect, in the case where the first locking means is provided, the first locking means is provided on the outer periphery of the first elastic member. At least one of the first protrusion or the first depression, and the second depression or the second that is engaged with the first protrusion or the first depression and provided on the inner periphery of the liquid port When the second locking means includes at least one of the protrusions and has the second locking means, the second locking means is a third protrusion or a third depression provided on the inner periphery of the first elastic member. A lead-acid battery comprising at least one and a fourth depressed portion or a fourth protruding portion that is engaged with the third protruding portion or the third depressed portion and provided on the outer periphery of the cylindrical portion is shown. That is, both the first locking portion and the second locking portion are constituted by a protruding portion and a depressed portion that accommodates and fits the protruding portion.

  According to a fourth aspect of the present invention, in the lead-acid battery having the configuration of the third aspect, at least one of the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion is at least one of the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion. 1 shows a lead-acid battery formed continuously or discontinuously along the circumferential direction of the outer periphery of the liquid port, the outer periphery or inner periphery of the first elastic member, or the outer periphery of the cylindrical portion. In addition, according to the formation shape of the 1st projection part-the 4th projection part, it has a shape which fits into these projection parts and latches together, and is respectively 1st depression part and 2nd depression part At least one of a third depression and a fourth depression is provided.

  According to a fifth aspect of the present invention, in the lead-acid battery having the configuration according to the first to fourth aspects, the outer periphery of the liquid port, the outer periphery or inner periphery of the first elastic member, or the outer periphery of the cylindrical portion A linear protrusion formed in a line along the mounting direction of the liquid stopper to the liquid opening, and a groove portion fitted to the linear protrusion are provided.

  The invention according to claim 6 of the present invention is a lead storage battery having the configuration of claim 2, and shows a lead storage battery in which at least one of the first locking means or the second locking means is screwed. is there.

  The invention according to claim 7 of the present invention is the lead storage battery having the configuration of claims 1 to 6, further comprising a second elastic member, the second elastic member including a press-fitting portion press-fitted into the gap, and the press-fitting The lead acid battery which is provided integrally with the part and includes a first flat part covering at least a part of the head is shown.

  According to an eighth aspect of the present invention, in the lead-acid battery having the configuration of the first to seventh aspects, the second elastic member includes a second elastic member, and the second elastic member includes a press-fit portion that is press-fitted into the gap, and the press-fit portion. The lead storage battery is formed integrally with the second portion and includes a second flat portion covering at least a part of the outer periphery of the opening outside the lid of the liquid port.

  The invention according to claim 9 of the present invention is the lead storage battery having the configuration according to claim 8, wherein the battery case is partitioned into a plurality of cell chambers, and an electrode plate group is accommodated in each cell chamber. Corresponding to the chamber, a plurality of the liquid ports are provided in the lid, and at least two of the press-fitting parts press-fitted into the respective gaps share the same second plane part. According to the configuration of the ninth aspect, even if the liquid port plug of one cell is removed from the liquid port, the liquid port plug is not removed from the liquid port in the other cells sharing the flat portion. The elastic member can be prevented from falling off, and the dropped liquid stopper can be prevented from falling off.

  According to a tenth aspect of the present invention, in the lead-acid battery having the configuration according to the ninth aspect, mounting portions to be mounted with at least one of a lid or a battery case are provided at both ends of the second flat surface portion. It is characterized by that. According to this configuration, the effect of the invention according to claim 9 can be obtained more reliably. That is, according to this configuration, the liquid spigot is removed by elastic elongation of the flat surface portion, but both ends of the flat surface portion are fixed to the fitting portion, so that dropping of the flat surface portion from the battery is suppressed, As a result, dropping from the battery after the liquid spout is detached from the liquid spout is also suppressed. For this reason, since the liquid spout is not completely detached from the liquid spout, it is easier to reattach the liquid spout to the liquid spout.

  According to an eleventh aspect of the present invention, there is provided a lead storage battery having the structure of any one of the first to tenth aspects, wherein the lead storage battery covers the head of the liquid spigot and is repeatedly attached and detached with a cover or battery case. Is shown. According to the invention of claim 10, when the liquid spout is pulled out from the liquid spout, the liquid spout is held between the cover and the lid. Accordingly, it is possible to suppress the falling off or loss of the dropped liquid stopper. And the user of a lead acid battery should just remove a cover from a lid | cover or a battery case, and should equip a liquid spout with a liquid spout again.

  The invention according to claim 12 of the present invention is a lead storage battery having the configuration of claim 11, and shows a lead storage battery having a cover made of an elastic material. When the liquid spout is energized and pulled out of the liquid spout, the kinetic energy of the liquid spout is absorbed by an elastic material (finally converted to thermal energy), thereby suppressing the spatter of the liquid spout, There is no need to form a thick cover, and the amount of resin used can be reduced. Further, it is possible to suppress a collision sound between the liquid spout and the cover.

  The invention according to claim 13 of the present invention is the lead storage battery having the configuration according to claim 11, wherein the lead storage battery is provided with an elastic material layer on the surface corresponding to at least the head of the inner wall of the cover. The invention of claim 13 is the same as the invention of claim 12 described above. However, if the cover body is made of an acid resistant resin such as PP resin, the elastic material layer may not be able to maintain the shape of the cover, for example, a foamed sponge such as EPDM or chloroprene rubber is used. The amount of elastic material layer used can be reduced.

  According to the present invention, even when the battery internal pressure rises abnormally, such as when hydrogen is ignited in the battery, or when an impact occurs inside the battery, the liquid port plug is detached from the liquid port, so that the battery internal pressure The abnormal rise and impact of the battery are alleviated, and structural damage to the lead-acid battery, that is, deformation and cracking of the lid and the battery case, or a decrease in liquid tightness at the joint between the lid and the battery case can be suppressed. In the state that the stopper is detached from the liquid mouth, the liquid mouth provided on the lid and the liquid mouth stopper are prevented from being damaged. Therefore, the lead-acid battery can be reused by reattaching the liquid mouth stopper to the liquid mouth. It has a remarkable effect of becoming.

  Furthermore, according to the present invention, unlike Patent Document 1 and Patent Document 2 as described above, it is not necessary to provide a structure for alleviating abnormal increase in battery internal pressure or impact at a place other than the liquid spigot. The regions other than the liquid mouth can be used for pasting various labels such as caution labels and product number labels, various displays that do not depend on the label, and storage or installation of a lead-acid battery deterioration determination device. There is a remarkable effect that cannot be achieved with the configuration.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.

(First embodiment of the present invention)
FIG. 1 is a view showing an appearance of a lead storage battery 101 according to the first embodiment of the present invention. In the lead storage battery 101, a lid 104 provided with a liquid port 103 is attached to a battery case 102 that houses an electrode plate group consisting of a positive electrode plate, a negative electrode plate, and a separator disposed between them. A liquid plug 105 is attached to the liquid port 103, and the liquid plug 105 has an exhaust port 106 for discharging gas (hydrogen gas and oxygen gas) generated from the electrode plate group in the battery case 102 to the atmosphere. Have. In addition, although the example shown in FIG. 1 has shown the example of the 12V lead acid battery in which six electrode plate groups were connected in series, it is not limited to this. Therefore, the example of FIG. 1 includes six liquid ports 103 corresponding to six electrode plate groups and six liquid port plugs 105 attached thereto.

  The present invention is characterized by the mounting structure of the liquid stopper 105 and the lid 104. FIG. 2A is a diagram showing a state before the liquid port plug 105 is mounted on the liquid port 103 provided on the lid 104 in the lead storage battery 101 of the present invention. FIG. 2B is a diagram showing a state in which the liquid port plug 105 is attached to the liquid port 103.

  In the first embodiment, the liquid spout 105 includes a head portion 105a in which an exhaust port 106 is formed, and a cylindrical portion 105b that extends from the head portion 105a and has a smaller diameter than the head portion 105a. It is preferable to dispose the porous filter 105c inside the cylindrical portion 105b. The porous filter 105c is effective in suppressing contamination of foreign matter inside the battery, suppressing discharge sparks and flames generated outside to the inside of the battery, and suppressing moisture reduction in the electrolyte, It consists of a known porous material suitable for these purposes. Also, a splash-proof plate having a known shape for suppressing the overflow of the electrolyte solution from the exhaust port 106 when the lead storage battery 101 is vibrated or overcharged is disposed inside the cylindrical portion 105b. Is preferred.

  In this embodiment, an example of a cylindrical shape is shown as the cylindrical portion 105b. However, the cylindrical portion 105b is not limited to this example. For example, the cylindrical portion may be hollow, and the cross-sectional shape is appropriately selected. be able to. In general, the diameter of the cylindrical portion 105b is larger than that of the head portion 105a. This is to prevent the liquid stopper 105 from dropping into the battery through the liquid opening 103, and will be described later. In order to obtain the above effect, the cylindrical portion 105b and the head portion 105a have the same diameter or smaller, or the outer cross-sectional shape of the cylindrical portion 105b and the shape of the top surface 105d of the head portion 105a are the same, or the cylindrical portion 105b The shape of the top surface 105d may be included in the cross-sectional shape.

  As shown in FIG. 2B, the lead storage battery 101 has a first elastic contact with the inner periphery of the liquid port 103 and the outer periphery of the cylindrical portion 105b in a state where the liquid port plug 105 is attached to the liquid port 103. A member 107 is disposed.

  If the 1st elastic member 107 has the acid resistance and heat resistance of the grade which can endure the tolerance with respect to the sulfuric acid in electrolyte solution, and the environmental temperature (for example, -20 degreeC-80 degreeC) where a lead acid battery is used. For example, it may be appropriately selected from materials such as chloroprene rubber (CR rubber) or ethylene-propylene-diene rubber (EPDM) used for the valve body of a control valve type lead-acid battery.

  In the present invention, the first elastic member 107 is compressed in the radial direction in a state where the liquid spout 105 is attached to the liquid spout 103. As a result, a frictional force is generated between the first elastic member 107 and the liquid spout 105 and between the first elastic member 107 and the liquid spout 103. Therefore, in a state where the battery internal pressure is normal, this frictional force is generated. Thus, the state in which the liquid spout 105 is attached to the liquid spout 103 is maintained.

  Then, when a shock wave is generated in the battery or the battery internal pressure rises abnormally due to some reason such as ignition of hydrogen gas staying in the battery, the liquid plug 105 is detached from the liquid port 103. Thus, the battery case 102 and the lid 104 are prevented from being damaged. Further, when the liquid spout 105 is detached, the first elastic member 107 is elastically deformed, so that the first elastic member 107 or the liquid spout 105 is subjected to irreversible deformation such as plastic deformation or breakage. Absent. Therefore, it is possible to reattach the liquid spout 105 to the liquid spout 103, and thus, the lead storage battery 101 can be reused.

  In the present invention, by detaching the liquid stopper 105, the lid 104 and the battery case 102 can be prevented from being damaged and the electrolyte solution from being scattered. And unlike the above-mentioned patent documents 1 and patent documents 2, since it becomes unnecessary to arrange the structure for controlling breakage in parts other than the liquid spigot on a lid, affixing a display label on a lid In addition, it is possible to solve the problem that a region necessary for these cannot be secured on the lid when forming various displays, attaching the deterioration determination device, or integrating it into the lid.

  In the first embodiment, the first elastic member 107 has a hollow ring shape, and the inner diameter of the first elastic member 107 in the free state is smaller than the outer diameter of the cylindrical portion 105b. One elastic member 107 is attached to and held by the cylindrical portion 105 b by its elastic force, and the outer diameter of the first elastic member 107 in the state of being attached to the cylindrical portion 105 b is larger than the inner diameter of the liquid port 103. By setting as described above, when the liquid spigot 105 with the first elastic member 107 attached is attached to the liquid spout 103, the first elastic member 107 is compressed and the liquid spout 105 is brought into the liquid spout 103. When attached, the liquid spout 105 is held in the liquid spout 103 by the elastic force of the first elastic member 107.

  Alternatively, the outer diameter of the first elastic member 107 in the free state is set to be smaller than the inner diameter of the liquid port 103, and the first elastic member 107 is press-fitted into the liquid port 103. If the inner diameter of the elastic member 107 is made smaller than the outer diameter of the cylindrical portion 105 b of the liquid port stopper 105, the cylindrical portion 105 b is attached by the elastic force when the cylindrical portion 105 b is mounted on the first elastic member 107 mounted on the liquid port 103. The portion 105 b is held in the liquid port 103, and as a result, the liquid port stopper 107 is held in the liquid port 105.

  In addition, the first elastic member 107 can be bonded to either the cylindrical portion 105b or the liquid port 103 by adhesion or fusion. For example, when the first elastic member 107 and the cylindrical portion 105 b are joined, if the outer diameter of the first elastic member 107 in this state is made larger than the inner diameter of the liquid port 103, the first elastic member 107 is joined. When the liquid stopper 105 is inserted into the liquid opening 103, the first elastic member 107 is compressed, and the liquid stopper 105 is attached and held in the liquid opening 103. As another example, the first elastic member 107 is bonded to the liquid port 103 by adhesion or fusion, and the inner diameter of the first elastic member 107 bonded to the liquid port 103 is set to the cylindrical portion 105b. By setting the diameter larger than the outer diameter, the liquid spigot 105 can be fixed to the liquid spout 103 by the elastic force of the first elastic member 107.

  In the above-described embodiment, the first elastic member 107 is elastic depending on the dimensional relationship between the outer diameter and inner diameter of the first elastic member 107, the inner diameter of the liquid port 103 and the outer diameter of the cylindrical portion 105b, and the material of the first elastic member 107. Since the force, that is, the holding force between the liquid port 103 and the liquid port plug 105 changes, the liquid port plug 105 does not separate from the liquid port 103 during normal use, and an abnormality such as when hydrogen is ignited inside the battery. It is obvious from the operational effects of the present invention described above that the dimensional relationship may be appropriately set so that the liquid stopper 105 is sometimes detached from the liquid opening 103.

(Second embodiment of the present invention)
FIG. 3 shows a mounting structure between the liquid spout 105 and the liquid spout 103 of the lead storage battery according to the second embodiment of the present invention. In addition, the structure of the part except the mounting structure between the liquid port stopper 105 and the liquid port 103 of the lead storage battery of the second embodiment is not different from the lead storage battery 101 of the first embodiment.

  In the second embodiment, there is a first locking means for locking the outer periphery of the first elastic member 108 and the inner periphery of the liquid port 103, and the first locking means is a first elastic member. The first protrusion 108 a formed on the outer periphery of the member 108, and the second depression 103 a formed on the inner periphery of the liquid port 103, which is engaged with the first protrusion 108 a. Note that the first elastic member 108 can be made of the same material as the first elastic member 107.

  Further, the example shown in FIG. 3 has second locking means for locking the inner periphery of the first elastic member 108 and the cylindrical portion 105b of the liquid spout 105. Similar to the first locking means, the second locking means includes a third protrusion 108b formed on the inner periphery of the first elastic member 108 and an outer periphery of the cylindrical portion 105b, as shown in FIG. And a fourth depression 105e that is engaged with the third protrusion 108b.

  In the example shown in FIG. 3, although the example which used the 1st latching means and the 2nd latching means together was shown, it is good also as only either one. Further, the shape of the protrusion and the depressed portion, the mutual positional relationship, or the formation position can be modified within a range that does not hinder the operation and effect of the present invention. According to the second embodiment, the liquid spigot 105 is held in the liquid spout 103 by the locking force with the first locking means and / or the second locking means. Similarly to the embodiment, when a force higher than the locking force is applied to the liquid stopper 105 due to an abnormal increase in the internal pressure of the battery or generation of a shock wave inside the battery, the liquid stopper 105 is detached from the liquid opening 103 and the lid 104 or Damage to the battery case 102 is suppressed. Further, unlike the above-described Patent Document 1 and Patent Document 2, as in the first embodiment, it is not necessary to arrange a structure for suppressing breakage in a portion other than the liquid spigot on the lid. When affixing display labels on the lid, forming various displays, or attaching a deterioration determination device or integrating it into the lid, it is possible to solve the problem that the area necessary for these cannot be secured on the lid. .

  In addition, according to the second embodiment, when the liquid spigot 105 is remounted on the liquid spout 103, the first locking means and / or the second locking means are locked at the same time as the liquid plug 103 is remounted. Since the insertion resistance of the plug 105 into the liquid port 103 is drastically reduced, the operator who remounts has an advantage that the completion of the attachment can be easily recognized with the decrease in the insertion resistance.

  In the second embodiment, when the liquid spout 105 is detached from the liquid spout 103, the first elastic member 108 may remain in either the liquid spout 103 or the cylindrical portion 105b. Therefore, it is possible to prevent the first elastic member 108 from detaching from both the liquid port 103 and the liquid port plug 105 and then being lost.

  When either one of the first locking means and the second locking means is not used, one of them has the same configuration as that of the first embodiment, that is, the first elastic member 108 is connected to the cylindrical portion 105b. Alternatively, it is also possible to employ a configuration in which one of the liquid ports 103 is press-fitted or a configuration in which the first elastic member 108 is joined to one of the cylindrical portion 105 b or the liquid port 103.

  In the example shown in FIG. 3, the first protrusion 108 a and the third protrusion 108 b are formed from the first elastic member 108, and the second depression 103 a that is locked to these protrusions is formed in the liquid port. 103 shows an example in which the fourth depressed portion 105e is provided in the cylindrical portion 105b. However, the relationship between the protruding portion and the depressed portion is reversed, and a second protruding portion (not shown) is formed on the inner periphery of the liquid port 103. A fourth protrusion (not shown) is provided on the outer periphery of the cylindrical portion 105b, and a first depression (not shown) and an inner periphery of the first elastic member 108 are provided on the outer periphery of the first elastic member 108. A third depression (not shown) may be formed in the other, or another combination may be used.

  In the example shown in FIG. 3, the first protrusion and the third protrusion are respectively provided over the outer periphery of the first elastic member 108 to provide the first protrusion 108 a, and the first elastic member An example in which the third protrusion 108b is provided continuously over the inner periphery of 108 is shown. These protrusions can be provided intermittently without being continuous. However, in such a case, when the liquid stopper 105 and the liquid outlet 103 are remounted, the protrusions and the depressions that are locked to the protrusions are aligned. Therefore, it is preferable to arrange them continuously on the circumference because it is easier to reattach the liquid stopper 105 to the liquid port 103 than to discontinuously provide them.

(Third embodiment of the present invention)
FIGS. 4 and 5 show the mounting structure of the liquid port plug 105 and the liquid port 103 of the lead storage battery according to the third embodiment of the present invention. The structure of the lead storage battery of the third embodiment except for the mounting structure between the liquid spout 105 and the liquid spout 103 is not different from the lead storage battery 101 of the first embodiment, and the present invention. The same effects as those of the first embodiment are obtained.

  FIG. 5 is a view showing an AA ′ cross section in FIG. 4. As shown in FIG. 5, in the third embodiment of the present invention, the outer periphery of the cylindrical portion 105 b and the inner periphery of the liquid port 103 are linearly formed along the mounting direction of the liquid port plug 105 to the liquid port 103. The formed linear protrusion 201 and the groove portion 202 fitted to the linear protrusion 201 are provided on the outer periphery of the liquid port 103, the outer periphery and the inner periphery of the first elastic member 109. By fitting the liquid spout 105 to the liquid spout 103 via the first elastic member 109 with the linear protrusion 201 and the groove portion 202, the liquid spout 105 is compared with the first embodiment of the present invention. Since the contact area between the first elastic member 109 and the first elastic member 109 and the liquid port 103 becomes larger, the compression rate of the first elastic member 109 can be set lower, so the first elastic member It is more preferable because the elasticity of 109 can be maintained for a long time. In the example shown in FIG. 5, the groove 202 is formed on the inner periphery and the outer periphery of the first elastic member 109, but either one may be used, and the inner periphery or the outer periphery of the first elastic member Alternatively, the linear protrusion 201 may be formed in place of the groove portion 202, and the groove portion may be formed on the inner periphery of the cylindrical portion 105b or the liquid port 103, and modifications can be made within the range where the effects of the present invention can be obtained. Note that the first elastic member 109 can be made of the same material as the first elastic member 107.

  The first to third embodiments described above can be used in combination with each other, and it is obvious from the description of the present specification so far that the effects of the present invention can be obtained.

(Fourth embodiment of the present invention)
FIG. 6 shows a mounting structure of the liquid port plug 105 and the liquid port 103 of the lead storage battery according to the fourth embodiment of the present invention. Note that the structure of the lead storage battery of the fourth embodiment except for the mounting structure between the liquid spout 105 and the liquid spout 103 is the same as the lead storage battery 101 of the first embodiment.

  In the fourth embodiment, the first locking means for locking the inner periphery of the liquid port 103 and the first elastic member 110, or the second locking means for locking the first elastic member 110 and the cylindrical portion 105b. Either one of the locking means is provided. In the example shown in FIG. 6, the first locking means is provided and the second locking means is not provided. The first locking means is formed by screwing, and the male port 103 b is connected to the liquid port 103. The example which formed the internal thread 110c in the outer periphery of the 1st elastic member 110 is shown. The first elastic member 110 can be made of the same material as the first elastic member 107.

  Although FIG. 6 shows an example in which the first locking means is provided and the second locking means is not provided, it is sufficient that both or one of them exists. Alternatively, the relationship between the male screw 103b and the female screw 110c may be reversed to form a female screw (not shown) in the liquid port 103 and a male screw (not shown) in the tube portion.

  According to the fourth embodiment, the same effect as that of the first embodiment can be obtained, and the wearer of the liquid port plug 105 can attach the liquid port plug 105 to the liquid port 103. When the torque for rotating 105 increases rapidly, it is possible to easily confirm the completion of mounting of the liquid spout 105.

  In addition, according to the fourth embodiment, as in the second embodiment, the first elastic member 110 is attached to the liquid port 103 or the liquid port plug 105 when the liquid port plug 105 is detached from the liquid port 103. Since this state is maintained, the first elastic member 110 can be prevented from being detached or lost alone, and the liquid stopper 105 can be quickly reattached to the liquid opening 103.

(Fifth embodiment of the present invention)
FIG. 7 shows a mounting structure of the liquid port plug 105 and the liquid port 103 of the lead storage battery according to the fifth embodiment of the present invention. The lead storage battery structure other than the mounting structure of the liquid spout 105 and the liquid spout 103 shown in FIG. 7 is not different from the lead storage battery 1 according to the first embodiment described above.

  In the fifth embodiment of the present invention, as shown in FIG. 7, a gap 203 is provided between the outer periphery of the head 105a of the liquid spout 105 and the inner periphery of the liquid spout 103 opposite to this. The second elastic member 204 is press-fitted into the gap 203.

  As the material used for the second elastic member 204, the same material as that used for the first elastic members 107, 108, 109, and 110 can be applied.

  According to the fifth embodiment, the same operational effects as those of the first embodiment described above can be obtained.

(Sixth embodiment of the present invention)
FIG. 8 shows a mounting structure of the liquid port plug 105 and the liquid port 103 of the lead storage battery according to the sixth embodiment of the present invention. The structure of the lead storage battery other than the mounting structure of the liquid spigot 105 and the liquid spout 103 shown in FIG. 8 is not different from the lead storage battery 1 according to the first embodiment described above.

  In the sixth embodiment of the present invention, the second elastic member 204 press-fitted into the gap 203 in the fifth embodiment is provided integrally with the press-fit portion 204a press-fitted into the gap 203, and the head 105a. The first flat surface 204b that covers at least a part of the top surface 105d of the liquid or the second flat surface that is provided integrally with the press-fitting portion 204a and covers at least a part of the outer periphery of the opening on the outside of the lid 104 of the liquid port 103. One or both of the parts 204c are provided. Note that the first flat portion 204b should be disposed at a position away from the exhaust port 106 so as not to hinder gas discharge from the exhaust port 106.

  Also in the sixth embodiment of the present invention, the same operational effects as in the first embodiment of the present invention are exhibited.

  When only the first flat portion 204b is provided, the state in which the second elastic member 204 is attached to the head portion 105a of the liquid spout 105 is maintained even when the liquid spout 105 is detached from the liquid spout 103. It is possible to prevent the second elastic member 204 from dropping off or being lost.

  When only the second flat surface portion 204c is provided, the state in which the second elastic member 204 is attached to the liquid port 103 is maintained even when the liquid port stopper 105 is detached from the liquid port 103. 204 can be prevented from being dropped or lost.

  When the first flat surface portion 204b and the second flat surface portion 204c coexist, a difference occurs in the behavior when the liquid spout 105 is detached from the liquid spout 103 depending on the area of the first flat surface portion 204b. That is, when the ratio of the first flat surface portion 204b covering the top surface 105d becomes high, the state where the first flat surface portion 204b is attached to the head is maintained when the liquid spout 105 is detached. On the other hand, when the ratio of the first flat surface portion 204b covering the top surface 105d becomes small, the liquid stopper 105 elastically deforms the first flat surface portion 204b and separates from the portion without the first flat surface portion 204b, and the second The elastic member 204 remains attached to the liquid port 103. In any combination, it is possible to prevent the second elastic member 204 from dropping or lost.

(Seventh embodiment of the present invention)
FIG. 9 shows a mounting structure of the liquid port plug 105 and the liquid port 103 of the lead storage battery according to the seventh embodiment of the present invention. In addition, the structure other than the mounting structure of the liquid port plug 105 and the liquid port 103 in the seventh embodiment is not different from the lead storage battery 101 of the first embodiment.

  In the seventh embodiment of the present invention, the battery case 102 is partitioned into a plurality of cell chambers 102a, and an electrode plate group (not shown) is accommodated in each cell chamber 102a. A plurality of liquid ports 103 corresponding to each cell chamber 102a are formed.

  In the second elastic member of the seventh embodiment of the present invention, the plurality of press-fitting portions 204a press-fitted into the gap 203 between the liquid port 103 and the head portion 105a in the sixth embodiment are the second plane. It has a configuration that shares parts. Other configurations are the same as those of the sixth embodiment, and the same effects as those of the sixth embodiment are achieved.

  In the present invention, in the case of a lead-acid battery composed of a plurality of cells, the lid 104 and the battery case 102 are damaged due to an abnormal increase in internal pressure due to factors such as hydrogen ignition in the cell chamber 102a or an impact. However, it rarely occurs simultaneously in adjacent cell chambers 102a. Therefore, even if one liquid spout 105 is detached, one liquid spout 105 is not detached, so that the second elastic member 204 is attached to the gap 203 of the liquid spout 105 that has not been detached. The second elastic member 204 can be prevented from being dropped or lost.

  At the same time, the first flat portion covers the portion of the top surface 105d excluding the exhaust port 106, so that the head 105a of the detached liquid port plug 105 has a press-fit portion 204a and a first flat portion 204b. Therefore, in addition to the dropout / loss of the second elastic member 204, the dropout / loss of the liquid spout 105 can be suppressed. In addition, as a structure of the mounting portion 205, a pin (not shown) that protrudes toward the side surface of the lid 104 may be provided, and a hole that engages with this pin may be provided on the side surface of the lid 104. May be adopted.

  In the seventh embodiment, more preferably, as shown in FIG. 10, mounting portions 205 are provided at both ends of the second flat surface portion 204 c, and the mounting portions 205 are mounted on the lid 104 or the battery case 102. The second flat portion 204c is prevented from falling off from the lead storage battery 101 ′. Further, by increasing the ratio of covering the top surface 105d of the first flat portion 204b, when the liquid spout 105 is detached from the liquid port 103, the top surface 105d of the first flat portion 204b is not covered. Since the liquid stopper 105 penetrates the hole 206 and is prevented from dropping from the lead storage battery 101 ′ body, it is possible to prevent the liquid stopper 105 from being dropped and lost, and as a result, the liquid outlet 103 of the liquid stopper 105. It becomes easy to reattach to.

  The fifth, sixth, and seventh embodiments described above can be used in combination with the first to fourth embodiments described above, and even if these are combined, the effects in the embodiments can be obtained. It will not be damaged.

(Eighth embodiment of the present invention)
The lead storage battery 101 ″ according to the eighth embodiment of the present invention is a cover that covers the head portion 105a of the liquid spout 105 as shown in FIG. 11 in the lead storage batteries of the first to seventh embodiments described above. 207 is attached to the lid 104 or the battery case 102. In addition, the cover 207 is detachable from the lid 104 or the battery case 102 because it is necessary to reattach the liquid stopper 105 to the liquid port 103. Obviously, the exhaust port 106 should not be blocked by the cover 207 from the outside air. The cover 207 has an exhaust hole (not shown) or between the cover 207 and the lid 104. In addition, an exhaust path, such as an exhaust gap (not shown), may be secured as appropriate.

  When the liquid spout 105 is removed from the liquid spout 103, the liquid spout 105 is held between the cover 207 and the lid 104. Accordingly, it is possible to more surely prevent the dropped liquid stopper 105, the first elastic member 107, 108, 109, 110, or the second elastic member 204 from dropping or missing. Then, the user of the lead storage battery 101 ″ only needs to remove the cover 207 from the lid 104 or the battery case 102 and attach the liquid spout 105 to the liquid spout 103 again.

  In the eighth embodiment of the present invention, more preferably, the cover 207 is made of an elastic material. When the liquid port stopper 105 is energized and escapes from the liquid outlet 103 due to an impact such as internal ignition of the cell chamber 102a or abnormal internal pressure, the kinetic energy of the liquid outlet stopper 105 is absorbed by an elastic material (finally heat By converting to energy, it is possible to suppress scattering of the liquid spout 105 and to eliminate the need to form the cover 207 thick, thereby reducing the amount of resin used. Further, it is possible to suppress a collision sound due to the collision between the cover 207 and the liquid spout 105.

  In the eighth embodiment of the present invention, more preferably, an elastic material layer (not shown) is provided on a surface corresponding to at least the head of the inner wall of the cover 207. This has the same technical significance as that of forming the cover 207 from an elastic material. In such a configuration, if the cover 207 body is made of an acid-resistant resin such as PP resin, the elastic material layer may not be able to maintain the shape as the cover. For example, EPDM, chloroprene rubber, etc. A foamed sponge can be used, and the usage amount of the elastic material layer can be reduced. In any case, it is obvious that the effects of the first embodiment can be achieved.

  38B19 (12V28Ah) battery defined in JIS D5301 (lead battery for start-up), battery according to the invention example and battery according to the comparative example in which the heating filament is arranged in the second cell counting from the positive electrode terminal to the negative electrode terminal side It was created. In the battery of the example of the present invention, the first elastic member 107 and the second elastic member 204 described in each embodiment are not used together, but are used independently. Chloroprene rubber was used for both the first elastic member 107 and the second elastic member.

(Invention Example 1)
The battery of Example 1 of the present invention is a lead storage battery according to the first embodiment of the present invention, and has the configuration shown in FIG. The first elastic member 107 is not bonded or fused to the liquid port 103 or the liquid port plug 105.

(Invention Example 2)
The battery of Example 2 of the present invention is a lead storage battery according to the second embodiment of the present invention, and has the structure shown in FIG.

(Invention Example 3)
The battery of Example 3 of the present invention is a lead storage battery according to the third embodiment of the present invention, and has the structure shown in FIGS. 4 and 5.

(Invention Example 4)
The battery of Example 4 of the present invention is a lead storage battery according to the fourth embodiment of the present invention, and has the structure shown in FIG.

(Invention Example 5)
The battery of Example 5 of the present invention is a lead storage battery according to the fifth embodiment of the present invention, and has the structure shown in FIG.

(Invention Example 6)
The battery of Example 6 of the present invention is the lead storage battery according to the sixth embodiment of the present invention, and has the configuration shown in FIG. 8, one for each gap 203, that is, a total of six second elastic members. This is a lead storage battery using 204.

(Invention Example 7)
The battery of Example 7 of the present invention is the lead storage battery according to the seventh embodiment of the present invention, and has the configuration shown in FIG. 9, and the second elastic member 204 is formed on the common second plane portion 204 c. This is a lead storage battery having two press-fit portions 204a.

(Invention Example 8)
The battery of Example 8 of the present invention is a lead storage battery according to the seventh embodiment of the present invention, and has the configuration shown in FIG.

(Invention Example 9)
A battery of Inventive Example 9 is a lead storage battery according to the eighth embodiment of the present invention, in which a PP resin cover 207 is attached to the battery of Inventive Example 1.

(Invention Example 10)
A battery of Inventive Example 10 is a lead storage battery according to the eighth embodiment of the present invention, in which a cover 207 in which an EPDM foam sheet is laminated is attached to the battery of Inventive Example 1.

(Battery of Comparative Example 1)
The battery of Comparative Example 1 is a battery in which the liquid spout 301 is screwed into the lid 302 as shown in FIG. The liquid port plug 301 is formed with an exhaust port 106 for discharging the gas in the battery.

(Battery of Comparative Example 2)
In the battery of Comparative Example 2, as shown in FIG. 13, a through hole 401a is formed in the head of the liquid spigot 401, and a closing plate 402 made of EPDM is press-fitted into the through hole 401a. When the battery internal pressure rises abnormally, the pressure input is adjusted so that the blocking plate 402 drops off from the through hole 401a. Note that an exhaust port 106 is formed in the closing plate 402 in order to release gas during normal charging into the atmosphere. The liquid spigot 401 and the lid 302 are screwed together.

  In all of the batteries of Examples 1 to 10 of the present invention and Comparative Examples 1 and 2, the porous filter 105c is disposed in the liquid stopper.

(Battery of Comparative Example 3)
In the battery of Comparative Example 3, as shown in FIG. 14, a through hole 401a is formed in the head of the liquid spigot 401, and a blocking plate 402 made of EPDM is press-fitted into the through hole 401a. When the battery internal pressure rises abnormally, the pressure input is adjusted so that the blocking plate 402 drops off from the through hole 401a. Note that an exhaust port 106 is formed in the closing plate 402 in order to release gas during normal charging into the atmosphere. The liquid spigot 401 and the lid 302 are screwed together. However, unlike the battery of Comparative Example 2, the liquid spigot 401 does not have the porous filter 105c and is provided with a splash-proof body 403 for preventing vibration overflow from the exhaust port 106. .

(Battery of Comparative Example 4)
The battery of Comparative Example 4 is a battery in which the splash-proof body 403 used in the battery of Comparative Example 3 is disposed in the liquid spout of the battery of Comparative Example 2.

  Hydrogen batteries and oxygen gas were intentionally generated in the cell by continuously charging 10 of each of the batteries described above after being fully charged with a constant current of 2.8 A. 10 minutes after the start of charging, the filament is energized, the hydrogen gas staying in the battery is forcibly ignited, the battery is damaged at that time, the liquid port plug can be reattached to the liquid port, and the lead storage battery We confirmed the situation such as reusability. These results are shown in Table 1.

  From the results shown in Table 1, all the batteries of Comparative Example 1 were energized in the filament, and at the same time, the hydrogen gas staying inside the cell was ignited, and the impact caused cracks in the lid and the battery case. This crack extends not only to the second cell from the ignited positive electrode terminal but also to the adjacent cell, and the total number of batteries of Comparative Example 1 became unreusable. Even in this state, the liquid spigot and the lid were kept screwed together.

  The batteries of Comparative Example 2 all ignited the hydrogen gas staying inside the cell at the same time as the filament was energized, and the impact caused cracks in the lid and the battery case, making it impossible to reuse. In this test, although the total number of the blocking plates 402 was detached from the liquid plug 401, the damage to the battery body could not be suppressed. In addition, the porous filter 105c housed inside the liquid stopper 401 was cracked and completely broken. Also in this state, the liquid spigot and the lid were kept screwed together.

  Similarly to the batteries of Comparative Examples 1 and 2, all of the batteries of Comparative Example 3 ignited the hydrogen gas staying inside the cell at the same time as the filament was energized, and the impact caused cracks in the lid and battery case. However, it cannot be reused. In this test, although the total number of the blocking plates 402 was detached from the liquid plug 401, the damage to the battery body could not be suppressed. Further, the splash-proof body 403 housed inside the liquid spout 401 was deformed. Even in this state, the liquid stopper and the lid were kept screwed together.

  Similarly to the batteries of Comparative Example 1, Comparative Example 2 and Comparative Example 3, all of the batteries of Comparative Example 4 ignited the hydrogen gas retained in the cell at the same time as the filament was energized, and the impact caused the lid and battery case. Cracks occurred and it was impossible to reuse. In this test, although the total number of the blocking plates 402 was detached from the liquid plug 401, the damage to the battery body could not be suppressed. Further, the porous filter 105c housed in the liquid stopper 401 was cracked, and the splash-proof body 403 was deformed. Even in this state, the liquid stopper and the lid were kept screwed together.

  For the battery of Example 1 of the present invention, the liquid spout is completely removed from the lid, but there is no trouble in reattaching the liquid sput to the liquid spout, and it is transformed into a lid, a battery case, etc. No abnormalities such as damage and damage were found, and the battery could be reused. In addition, the state with which the 1st elastic member was mounted | worn with the liquid spout was maintained. No structural abnormality was observed in the porous filter 105c.

  For the battery of Example 2 of the present invention, the liquid spout is completely removed from the lid, but there is no trouble in reattaching the liquid sput to the liquid spout and it is transformed into a lid, a battery case, etc. No abnormalities such as damage and damage were found, and the battery could be reused. In addition, the state with which the 1st elastic member was mounted | worn with the liquid port was maintained. No structural abnormality was observed in the porous filter 105c.

  For the battery of Example 3 of the present invention, the liquid spout is completely removed from the lid, but there is no trouble in reattaching the liquid sput to the liquid spout and it is transformed into a lid, a battery case, etc. No abnormalities such as damage and damage were found, and the battery could be reused. In addition, the state with which the 1st elastic member was mounted | worn with the liquid port was maintained. No structural abnormality was observed in the porous filter 105c.

  For the battery of Example 4 of the present invention, the liquid spout is completely detached from the lid, but there is no trouble in reattaching the liquid sput to the liquid spout, and it is transformed into a lid, a battery case, etc. No abnormalities such as damage and damage were found, and the battery could be reused. In addition, the state with which the 1st elastic member was mounted | worn with the liquid port was maintained. No structural abnormality was observed in the porous filter 105c.

  For the battery of Example 5 of the present invention, the liquid spout is completely removed from the lid, but there is no major problem in reattaching the liquid sput to the liquid spout, and the lid, battery case, etc. Since there was no abnormality such as breakage, it could be reused as a battery. Note that the first elastic member was detached from the liquid port and the liquid port plug, and was dropped on the lid or around the battery. No structural abnormality was observed in the porous filter 105c.

  For the battery of Example 6 of the present invention, the liquid spout is completely detached from the lid, but there is no trouble in reattaching the liquid sput to the liquid spout and it is transformed into a lid, a battery case, etc. No abnormalities such as damage and damage were found, and the battery could be reused. In addition, the state with which the 1st elastic member was mounted | worn with the liquid spout was maintained. No structural abnormality was observed in the porous filter 105c.

  For the battery of Example 7 of the present invention, the liquid port plug is completely detached from the lid, but there is no trouble in reattaching the liquid port plug to the liquid port, and it is transformed into a lid, a battery case, etc. No abnormalities such as damage and damage were found, and the battery could be reused. The liquid spout was in a state of being attached to the second elastic member. Further, the second elastic member was maintained in a state where it was press-fitted into the gap between the liquid port of the cell that did not ignite and the head of the liquid port plug, and did not fall off from the lid. No structural abnormality was observed in the porous filter 105c.

  For the battery of Example 8 of the present invention, the liquid spout is removed from the lid, but immediately after that, it is returned to the liquid spout by the second elastic member. In this state, it was possible to reattach the liquid spigot by pushing the head of the liquid spigot, and there was no abnormality such as deformation or breakage in the lid, battery case, etc. It was possible to use. No structural abnormality was observed in the porous filter 105c.

  For the battery of Example 9 of the present invention, the liquid spout was removed from the lid, but the removed liquid spout was held in the cover. When the liquid stopper was removed, the liquid stopper and the cover collided to produce sound. There was no breakage of the liquid stopper, no damage to the lid and the battery case, and the liquid stopper could be remounted and reused as a battery. No structural abnormality was observed in the porous filter 105c.

  The battery of Inventive Example 10 shows the same behavior as the battery of Inventive Example 9, but an EPDM foamed sheet is stuck inside the cover. Was significantly reduced as compared with the battery of Example 9 of the present invention. No structural abnormality was observed in the porous filter 105c.

  Moreover, in all the batteries of Invention Examples 1 to 10, there was no damage to the liquid plug main body, the liquid port, the first elastic member, or the second elastic member. Further, although not shown in Table 1, the present invention examples 1 to 10 were also applied to the batteries in which the porous filter 105c was removed from the liquid spigot and the splash-proof body 403 was disposed in all of the present invention examples 1 to 10. Similar results were obtained, and no damage or deformation of the splash-proof body 403 was observed. Further, in all the batteries of Invention Examples 1 to 10, the same results as those of Invention Examples 1 to 10 were obtained in the batteries to which the splash-proof body 403 was added, and the porous filter 105c and the splash-proof body 403 were damaged. No deformation was observed.

  As described above, according to the configuration of the present invention, even when the impact such as hydrogen ignition in the battery or the internal pressure abnormally rises due to some factor, the liquid spout is detached from the lid and the impact or In order to alleviate the abnormal increase in internal pressure, the lid and the battery case were significantly prevented from being damaged. And since the mounting structure of the liquid stopper and the lid is not damaged, the liquid stopper can be reattached to the liquid outlet, and the remarkable effect that it can be reused as a lead storage battery was obtained.

  Furthermore, according to the present invention, the structure that relaxes the abnormal internal pressure and impact by removing the liquid spigot occupies only a small part around the liquid spigot, and forms various labels and various displays, or A region for installing the deterioration determination device or integrally provided on the lid is ensured in the same manner as the battery of the comparative example, and has a remarkable effect that is not found in Patent Document 1 and Patent Document 2.

  According to the configuration of the present invention, it is particularly effective in suppressing breakage of a liquid type lead storage battery, can be applied to lead storage batteries for various uses, and is extremely effective industrially.

The figure which shows the external appearance of the lead acid battery by the 1st Embodiment of this invention. (A) The figure which shows the principal part cross section of the lead acid battery by the 1st Embodiment of this invention (b) The other figure which shows the principal part cross section of the lead acid battery by the 1st Embodiment of this invention The figure which shows the principal part cross section of the lead acid battery by the 2nd Embodiment of this invention. The figure which shows the principal part cross section of the lead acid battery by the 3rd Embodiment of this invention. The figure which shows the other principal part cross section of the lead acid battery by the 3rd Embodiment of this invention. The figure which shows the principal part cross section of the lead acid battery by the 4th Embodiment of this invention. The figure which shows the principal part cross section of the lead acid battery by the 5th Embodiment of this invention. The figure which shows the principal part cross section of the lead acid battery by the 6th Embodiment of this invention. The figure which shows the principal part cross section of the lead acid battery by the 7th Embodiment of this invention. The figure which shows the other lead acid battery by the 7th Embodiment of this invention. The figure which shows the lead acid battery by the 8th Embodiment of this invention. The figure which shows the principal part cross section of the lead acid battery of a comparative example The figure which shows the principal part cross section of the lead acid battery of another comparative example. The figure which shows the principal part cross section of the lead acid battery of another comparative example.

101, 101 ′, 101 ″ lead storage battery 102 battery case 102a cell chamber 103 liquid port 103a second depressed portion 103b male screw 104 lid 105 liquid port stopper 105a head portion 105b cylindrical portion 105c porous filter 105d top surface 105e fourth depressed portion Portion 106 exhaust port 107, 108, 109, 110 first elastic member 108a first protrusion 108b third protrusion 110c female thread 201 linear protrusion 202 groove 203 gap 204 second elastic member 204a press-fit portion 204b first Flat portion 204c second flat portion 205 mounting portion 206 hole 207 cover 301 liquid port plug 302 lid 401 liquid port plug 401a through hole 402 blockage plate 403 splash-proof body

Claims (13)

A battery case containing an electrode plate group; a head mounted on the battery case and having a lid with a liquid port; and an exhaust port; and a head projecting downward from the head and the head A lead-acid battery in which a liquid spout comprising a cylindrical portion having a smaller diameter is attached to the liquid spout, the first elastic member in contact with the inner periphery of the liquid spout and the outer periphery of the cylindrical portion, or the head A lead-acid battery comprising at least one second elastic member press-fitted into a gap between the outer periphery of the part and the inner periphery of the liquid port. A first locking means provided with the first elastic member, for locking the inner periphery of the liquid port and the outer periphery of the first elastic member in contact with the inner periphery; or the first elastic member The lead acid battery of Claim 1 provided with at least any one of the 2nd latching means which latches an inner periphery and the said cylinder part. In the case where the first locking means is provided, the first locking means includes at least one of a first protrusion or a first depression provided on an outer periphery of the first elastic member, and the first locking means. And the at least one of the second depression or the second protrusion provided on the inner periphery of the liquid port.
In the case where the second locking means is provided, the second locking means includes at least one of a third protrusion or a third depression provided on an inner periphery of the first elastic member, and the second locking means. The lead acid battery according to claim 2, further comprising: a fourth depressed portion or a fourth protruding portion that is locked to the three protruding portions or the third depressed portion and provided on an outer periphery of the cylindrical portion. At least one of the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion is an outer periphery of the liquid port, an outer periphery or an inner periphery of the first elastic member. The lead acid battery according to claim 3, or formed continuously or discontinuously along the respective circumferential directions of the outer periphery of the cylindrical portion. Linear protrusions formed linearly on the outer periphery of the liquid port, on the outer periphery or inner periphery of the first elastic member, or on the outer periphery of the cylindrical portion along the mounting direction of the liquid port plug to the liquid port And the lead acid battery of Claims 1-4 provided with the groove part fitted to the said linear protrusion. The lead-acid battery according to claim 2, wherein at least one of the first locking means or the second locking means is screwed. The second elastic member includes the press-fit portion that is press-fitted into the gap, and a first flat portion that is provided integrally with the press-fit portion and covers at least a part of the head. The lead acid battery according to claim 1, comprising: The second elastic member includes a press-fitting portion that is press-fitted into the gap, and is provided integrally with the press-fitting portion, and at least the outer periphery of the opening outside the lid of the liquid port. The lead acid battery according to claim 1, comprising a second flat portion covering a part thereof. The battery case is partitioned into a plurality of cell chambers, and electrode plate groups are accommodated in the respective cell chambers, and a plurality of the liquid ports are provided in the lid corresponding to the respective cell chambers. The lead storage battery according to claim 8, wherein at least two of the press-fitted parts press-fitted into the same share the same second flat part. The lead acid battery according to claim 9, wherein mounting portions that can be mounted on at least one of a lid and a battery case are provided at both ends of the second flat surface portion. The lead acid battery according to claim 1, wherein a cover that can be repeatedly attached and detached is attached to the lid or the battery case while covering the head of the liquid spigot. The lead acid battery according to claim 11, wherein the cover is made of an elastic material. The lead acid battery according to claim 11, wherein an elastic material layer is provided on at least a surface of the inner wall of the cover corresponding to the head.

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