JP2003162990A - Lead storage battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lead storage battery which can surely evacuate gases even if gas outlets are covered with a nonporous sheet or the like when the lead storage battery is on charge or discharge. <P>SOLUTION: A space is formed between a sheet or the like covering the outlet 26 and the outlet 26 by arranging protrusions around the outlet 26 opened in a top cover 23 of the lead storage battery, and the exhaust gases are exhausted into the space. Or at least two protrusions are arranged, and the outlet 26 is opened in the valley portion formed between the protrusions. Or grooves 9 are formed around the protrusions, and the outlets 26 are opened in the grooves 9. Grooves 11 are formed so as to cross with grooves 10 connected to the grooves 9 on the middle cover 22 formed on the top face or side face of the battery. Moreover, the grooves 10 and/or 11 formed on the top face or side face of the battery are extended so as to reach ends of the middle cover 22. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead-acid battery in which the gas generated inside the battery can be effectively discharged to the outside of the battery, and in particular, even if the top and side surfaces are covered with a non-breathable rubber sheet or the like. The present invention relates to a lead storage battery that does not interfere with gas discharge.

[0002]

2. Description of the Related Art Lead-acid batteries are used as secondary batteries mounted on automobiles and ships. However, when lead-acid batteries are overcharged, electrolysis reaction of water, which is electrolyte solution, occurs and hydrogen gas is generated. And oxygen gas is generated. If the generated gas is left as it is, the internal pressure of the lead storage battery increases and the battery case swells, degrading the performance of the lead storage battery, and in some cases it may become unusable. Therefore, it is necessary to discharge the generated gas from the inside of the lead storage battery. In the control valve type lead-acid battery,
A control valve and an exhaust port are provided on the lid to generate gas inside,
When the internal pressure exceeds a certain level, the control valve opens, and the electrolyte is not leaked out of the lead storage battery, and only the gas is discharged.

FIG. 8 is a vertical sectional view of an example of a valve-regulated lead-acid battery. Inside the battery case 21, there is housed a power generation element (both not shown) formed by arranging a positive electrode active material, a negative electrode active material, and a separator arranged between these positive and negative active materials in a layered manner. It is immersed. The upper portion of the battery case 21 is covered with an inner lid 22 and is sealed by thermal welding so that the electrolytic solution does not leak from the inside of the lead storage battery.
There is a recess 24 in the center of the inner lid 22.
A rubber-made control valve 25 is attached so as to close the cylindrical opening 12 formed in 4. When the internal pressure of the lead storage battery becomes high due to the generation of gas inside the lead storage battery due to overcharge of the lead storage battery or the like, the control valve 25 is broken when the pressure exceeds a certain pressure value, and the inside of the lead storage battery is damaged. Exhaust the gas generated in. In this way, the internal pressure of the lead storage battery is adjusted so as not to exceed a predetermined pressure. Furthermore, the depression 2
The upper surface of 4 is covered with an upper lid 23 to protect the control valve 25 made of rubber and to prevent the electrolytic solution from scattering inside, and its periphery is heat-welded or ultrasonic-welded. Furthermore, an exhaust port 26 for exhausting the gas exhausted from the control valve 25 from the recess 24 is opened in the upper lid 23.

FIG. 9 is an overall perspective view showing a state in which the lead storage battery is fixed. As shown in this figure, when the lead storage battery 1 is mounted on an automobile or the like, the lead storage battery 1 is placed on a tray 27, and the lead storage battery 1 is pressed from above with an iron plate 28a serving as a fixing bracket 28 by a bolt 28b. To fix by. In this case, the fixing member 28 straddles the upper lid 23 provided with the exhaust port 26 and fixes the central portion thereof. In this case, in order to alleviate slight vibrations caused by the engine or running, prevent the lead storage battery 1 from shifting on the tray 27, and prevent the lead storage battery 1 from being damaged by the fixing metal fitting 28, the lead storage battery 1 and the lead storage battery 1 are prevented from being damaged. An elastic sheet 29 such as a rubber sheet may be sandwiched between the upper or side surface of the storage battery 1 and the fixture 28. Further, in the case of a small lead storage battery mounted on a motorcycle or the like, it may be fixed to the tray with a rubber band or the like without using a fixing metal fitting.

[0005]

The fixing metal fitting 28 for mounting the lead storage battery has various shapes depending on the type of vehicle to be mounted, and there are cases where the lead storage battery 1 is pressed from above or the side surface is sandwiched as described above. , Its fixed position is also different. Therefore, the seat 2 used for fixing
9 covers the exhaust port 26, and even if the sheet 29 is not used, the iron plate 28a used for the fixing fitting 28 is the exhaust port 2
6 may be closed, and the exhaust port 26 may be closed even when fixed with a rubber band. Such an iron plate 2
Since a fixture such as 8a or a rubber band blocks the exhaust port 26,
In the control valve type lead storage battery, there is a problem that the gas generated inside the lead storage battery 1 is not discharged to the outside of the lead storage battery 1 even if the control valve 25 operates.

If gas accumulates inside the lead-acid battery 1, the battery case 21 will swell and cause deterioration of the performance of the lead-acid battery 1, or in the worst case, the battery will become unusable. It may be possible to increase the diameter of the exhaust port 26 or increase the number of the exhaust ports 26 in order to improve the exhaust of the gas generated inside the battery. Dust or water will infiltrate into the valve, which may adversely affect the operation of the control valve 25 or damage the filter in the control valve type lead storage battery. On the other hand, the component of the discharged gas is mainly a mixed gas of hydrogen and oxygen, and it is necessary to take all possible measures in consideration of the case where a spark or the like enters from the exhaust port 26.

The present invention has been made to solve the above problems, and even when the exhaust port is covered with a sheet having no air permeability during charging or discharging of the lead storage battery, An object of the present invention is to provide a lead acid battery that can reliably discharge gas.

[0008]

The invention according to claim 1 is characterized in that an exhaust port is opened on the upper surface or the side surface of the battery, and a protrusion is provided in the peripheral portion of the exhaust port.

According to the first aspect of the invention, since the projection is provided in the peripheral portion of the exhaust port, even if the exhaust port is covered with a non-breathable sheet such as a rubber sheet, it is between the exhaust port and the sheet. Since the space is created, the gas can be discharged to the outside of the lead storage battery without blocking the gas exhaust port.

According to a second aspect of the present invention, at least two of the above-mentioned protrusions are provided, and an exhaust port is opened in a valley formed between the protrusions.

According to the second aspect of the present invention, since the exhaust port is opened in the valley formed between the protrusions, it is possible to prevent the exhaust port from being covered with a non-breathable sheet such as a rubber sheet. Also, since the seat or the like does not come into close contact with the exhaust port and a space is formed between the exhaust port and the seat due to the trough, the gas can be reliably exhausted. Further, if the valley portion has a length and continues to the outside of the covered sheet, the space serves as an exhaust passage for the discharged gas, so that the gas can be surely discharged.

A third aspect of the invention is characterized in that a groove is formed in the peripheral portion of the protrusion.

According to the third aspect of the present invention, even when the exhaust port is covered with a non-breathable sheet such as a rubber sheet, a gap is formed between the sheet and the exhaust port, so that the exhaust gas is exhausted. Will flow into the gap and be reliably discharged through the groove formed in the peripheral portion of the protrusion.

The invention according to claim 4 is characterized in that a groove is formed on the upper surface or the side surface of the battery, and an exhaust port is opened in the groove.

According to the fourth aspect of the invention, even when the exhaust port is covered with a non-breathable sheet such as a rubber sheet, the sheet does not come into close contact with the exhaust port, and the discharged gas is As a result, the gas flows through the groove to a place where the sheet is not covered, and the gas can be reliably discharged.

The invention of claim 5 is characterized in that another groove is formed so as to intersect with the groove formed on the upper surface or the side surface of the battery, and the exhaust port is opened in any of these grooves. is there.

According to the fifth aspect of the present invention, by providing another groove that intersects with the groove in which the exhaust port is opened, the gas exhaust passage can be secured even when the sheet covers a wide area. , Will be reliably discharged.

The invention of claim 6 is characterized in that one or both of the grooves formed on the upper surface or the side surface of the battery reach the end portion.

According to the invention of claim 6, any of the grooves always reaches the end of the upper surface or side surface of the storage battery.
Even if the upper surface is covered with a rubber sheet or the like, the gas will enter the groove, and will surely travel along the groove to reach the outside and be discharged.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the lead acid battery of the present invention will be described below with reference to the drawings. In addition, in order to avoid using different reference numerals for the same elements, the same reference numerals as the reference numerals described in the related art will be used for the same constituent elements.

FIG. 1 shows the first embodiment of the present invention and is an overall perspective view of a lead storage battery in which a protrusion is provided in the peripheral portion of an exhaust port. FIG. 2 is a partially enlarged vertical cross-sectional view of the vicinity of the exhaust port when the upper surface of the lead storage battery having a protrusion around the exhaust port is covered with a rubber sheet. As shown in the conventional example, the lead storage battery 1 (hereinafter, referred to as a lead storage battery or a control valve type lead storage battery) has a battery case 21 in which a power generating element is housed, an inner lid 22 having a control valve structure therein, And an upper lid 23. The upper lid 23 protects the internal control valve 25 and seals the periphery of the inner lid 22 to the inner lid 22 by heat welding or the like to prevent the electrolyte from leaking. Protrusions 2 and 2 are provided on the upper surface of the upper lid 23 at regular intervals, and exhaust ports 26 and 26 are provided near the protrusions 2 and 2 in the internal space 2
4 (see FIG. 2). As shown in FIG. 2, the exhaust ports 26, 26 are covered with the sheet 29 by the protrusions 2 as shown in FIG. 2 even when they are covered with the vibration-proof sheet 29 and the battery fixing fixture 28 (see FIG. 7).
However, a space 3 is formed between the exhaust port 26 and the seat 29 without adhering to the exhaust port.

That is, the control valve 25 is broken by the high pressure gas,
The gas discharged from the inside of the battery into the recess 24 is discharged through the exhaust port 2
6 is discharged into the space 3 outside the lead storage battery, and passes between the sheet 29 and the upper surface of the lead storage battery 1. Therefore,
The high-pressure gas is not hindered from being discharged and is reliably discharged to the outside. It should be noted that the shape of the protrusion 2 is such that when the sheet or the like is covered, the space 3 is formed in the vicinity of the exhaust port 26.
Since it is sufficient that the gas is formed and the gas can be discharged, its shape and size can be arbitrarily determined depending on the material such as the sheet.

FIG. 3 shows a second embodiment of the present invention, and is an overall perspective view of a lead storage battery in which an exhaust port 26 is opened in a valley portion 5 formed by opposing projections (4, 4). . As shown in the conventional example, the control valve type lead-acid battery which is the lead-acid battery 1 has a central portion of an inner lid 22 placed on a battery case 21 accommodating a power generating element, and its periphery is sealed by heat welding or the like. Is provided (the same configuration is applied to the lead storage batteries below). Then, the protruding portion 4 and the protruding portion 4 facing each other at a short distance are fixedly installed between the inner lid 22 and the upper lid 23 having the control valve structure inside, and the valley portion 5 is formed by these protruding portions. In this figure, two sets of valleys 5 formed by the projections (4, 4) are formed, but one set or three sets or more may be formed. An exhaust port 26 for exhausting gas generated in the battery case 21 is formed in the upper lid 23 in the valley 5 so as to penetrate to the internal space 24.

In this embodiment, even if the vibration isolating sheet 29 and the battery fixing fixtures 28 (see FIG. 9) are covered on the exhaust port 26, the projections 4 and 4 are used to cover the exhaust port 26 and the sheet. Since the space 3 (see FIG. 2) is formed between 29 and the fixing fitting 28, gas can be exhausted. Further, the valley portion 5 formed between the protrusions 4 and 4 serves as a passage for the discharged gas, and the gas can be discharged to a place where the sheet 29 or the like is not covered. In the present embodiment,
The protrusion 4 has two elongated rectangular shapes, but it is sufficient that the space 3 is formed when the sheet 29 and the fixing metal fitting 28 are covered with the exhaust port 26 and gas can be discharged.
The shape and size of the fixing metal fitting 28 and the fixing place,
The number and the number of sheets 29 may be arbitrarily determined depending on the material and size of the sheet 29. Further, by extending the length of the protruding portion 4 to the edge forming the upper surface of the lead storage battery 1, the gas may be discharged from the side surface even when the entire upper surface is covered with a sheet or the like.

FIG. 4 shows a third embodiment of the present invention, and is an overall perspective view of a lead storage battery in which an exhaust port is opened in a valley formed by opposing projections and a groove is further provided. This control valve type lead-acid battery 1 is slightly similar to that of the second embodiment, but in this case, there are two projecting portions 6 facing each other on the upper surface of the upper lid 23, and they are formed between the projecting portions 6. An exhaust port 26 is formed in the valley portion 7, and a groove 8 is provided at the cut of the valley portion 7. Also in this case, two sets of the projecting portions 6 and 6 facing each other and the valley portion 7 between them are provided, but one set may be provided, or three or more sets may be provided.

In this embodiment, the exhaust port 26
The gas exhausted from the exhaust port 26 is exhausted to the space formed between the exhaust port 26 and the seat 29, etc.
It can be discharged through the groove 8 to a place where the sheet 29 and the like are not covered. Since the exhaust passage formed by the valleys 7 formed by the protrusions 6 and 6 and the exhaust direction of the groove 8 are different from each other, the gas can be effectively discharged when the exhaust passage is covered over a wide area.

FIG. 5 shows a fourth embodiment of the present invention, and is an overall perspective view of a lead storage battery in which an exhaust port is opened in a groove and other intersecting grooves are provided. In this control valve type lead-acid battery 1, a groove 9 is provided on the upper surface of the upper lid 23, and an exhaust port 26 is opened in the groove 9. Also,
Grooves 10, 10 connected to the groove 9 and a groove 1 intersecting with the groove 10 are formed on the upper surface of the inner lid 22 in which the upper lid 23 is fitted.
1 and 11 are provided. In addition, these grooves (9, 10,
11) may be provided on only one of them.

According to the fourth embodiment, the exhaust port 2
Even when 6 is covered with the seat 29 and the fixing fitting 28 (both of which are shown in FIG. 9), the exhaust port 26 is in the groove, so that the seat 29 and the fixing fitting 28 do not adhere to the exhaust opening 26. The gas discharged from the exhaust port 26 is supplied to the grooves 9, 10
It is discharged to the place where the sheet is not covered by passing through. Even when the sheet or the like covers all of the grooves 9 and 10, the gas flows into the grooves 11 and 11 which are orthogonal to each other, so that even if it covers a wide range, it can be effectively discharged.

FIG. 6 shows a fifth embodiment of the present invention. As in the case of the fourth embodiment, an exhaust port is opened in the groove, and the other lead storage battery is provided with another groove intersecting with it. It is a perspective view. In this control valve type lead-acid battery 1, a groove 9 is provided on the upper surface of the upper lid 23, and an exhaust port 26 is provided in the groove 9.
Is open. Grooves 10 and 10 connected to the groove 9 and grooves 11 and 11 intersecting with the groove 10 are also provided on the upper surface of the inner lid 22 into which the upper lid 23 is fitted. In this case, the grooves 10 and 10 are provided. 11 and 11 are provided so as to reach the end of the inner lid 22. In addition, these grooves (9, 1
0, 11) may be provided on only one of them, and further reach the end of the inner lid 22 as shown in FIG.
It may be a part of the grooves 10, 10 or the grooves 11, 11.

According to the fifth embodiment, the exhaust port 2
Even when 6 is covered with the seat 29 and the fixing fitting 28 (both of which are shown in FIG. 9), since the exhaust port 26 is in the groove, the seat 29 and the fixing fitting 28 do not come into close contact with the exhaust opening 26. The gas discharged from the exhaust port 26 is supplied to the grooves 9, 10
It is exhausted to the place where the sheet etc. is not covered. Even when the sheet or the like covers all of the grooves 9 and 10, the gas flows into the grooves 11 and 11 which are orthogonal to each other, so that even if it covers a wide range, it can be effectively discharged. Furthermore, the groove 10 or / and the groove 11 or a part thereof is
By forming up to the end of the inner lid 22 that constitutes the battery upper surface, the gas can be reliably discharged from the battery side surface even if the entire battery upper surface is covered with a sheet or the like.

In each of the above embodiments, the inner lid 2
2 or the upper surface of the upper lid 23, the protrusion 2 and the groove (9, 10, 1
1) and the case where the exhaust port 26 and the like are provided,
These may be provided on the side surface of the inner lid 22, when it is better to provide the side surface of the inner lid 22 than the upper surface depending on the installation location of the lead storage battery.

[0032]

As described above in detail, according to the lead-acid battery of the present invention, even if the exhaust port is covered with an object by providing the protrusions around the exhaust port, the gas is exhausted. Since the passage is secured, gas will not be accumulated inside the battery. Alternatively, by opening the exhaust port in a groove carved on the surface of the battery, it is possible to prevent the exhaust port from being blocked and the groove serves as an exhaust passage so that the gas accumulated inside the battery can be effectively discharged. You can

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention and is an overall perspective view of a lead storage battery in which a protrusion is provided in the peripheral portion of an exhaust port.

FIG. 2 is a partially enlarged vertical cross-sectional view of the lead storage battery in the vicinity of the exhaust port when the upper surface of the battery is covered with a sheet, showing a usage example of the first embodiment of the present invention.

FIG. 3 shows a second embodiment of the present invention and is an overall perspective view of a lead storage battery in which an exhaust port is opened in a valley between two protrusions.

FIG. 4 shows a third embodiment of the present invention, and is an overall perspective view of a lead storage battery in which an exhaust port is opened in a valley between two protrusions and a groove is provided around the protrusion. It is a figure.

FIG. 5 shows a fourth embodiment of the present invention and is an overall perspective view of a lead storage battery in which an exhaust port is opened in a groove and another groove intersecting with the groove is provided.

FIG. 6 shows a fifth embodiment of the present invention, in which an exhaust port is opened in a groove provided in the upper lid, and another groove intersecting with the groove provided so as to be connected to the inner lid is provided. FIG. 3 is an overall perspective view of a lead storage battery provided on the upper surface of the inner lid and having these grooves provided up to the end portion of the inner lid.

FIG. 7 is a modification of the fifth embodiment of the present invention,
It is the whole lead storage battery perspective view when a part of groove provided in the inner lid reaches the end of the inner lid.

FIG. 8 shows a conventional example and is a vertical cross-sectional view of a lead storage battery.

FIG. 9 is a perspective view of a conventional example, in which a lead storage battery is fixed when mounted on a vehicle.

[Explanation of symbols]

2, 4, 6 protrusions 5, 7 Tanibe 8, 9, 10, 11 groove 3 space

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5H011 AA13 BB03 CC02 DD07 KK00                 5H012 AA07 BB02 CC01 JJ10                 5H028 BB02 CC07 HH00

Claims (6)

[Claims] 1. A lead storage battery, characterized in that an exhaust port is opened on a top surface or a side surface of the battery and a protrusion is provided in a peripheral portion of the exhaust port. 2. A lead storage battery characterized in that at least two protrusions described above are provided, and an exhaust port is opened in a valley formed between the protrusions. 3. The lead acid battery according to claim 1, wherein a groove is formed in the peripheral portion of the protrusion. 4. A lead storage battery characterized in that a groove is formed on the upper surface or side surface of the battery, and an exhaust port is opened in the groove. 5. A lead storage battery characterized in that another groove is formed so as to intersect with a groove formed on the upper surface or side surface of the battery, and an exhaust port is opened in any of these grooves. 6. The groove formed on the upper surface or the side surface of the battery, either one or both of which reach the end portion of the upper surface or the side surface of the battery. Lead acid battery.