JP3965665B2 - Sealed lead acid battery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a monoblock sealed lead-acid battery mainly used for motorcycles.
[0002]
[Prior art]
Among sealed lead-acid batteries, batteries used for starting engines such as motorcycles consume a large amount of current when starting the engine, and when the engine starts, the rotation of the engine is used to control the current or voltage generated from the alternator. Automatically charged. On the other hand, a battery mounted on an electric vehicle is used for a so-called cycle application in which charging is performed when the voltage is reduced to a predetermined value after being substantially unilaterally discharged and discharged when the voltage is fully charged.
[0003]
Generally, a sealed lead-acid battery used for a motorcycle or the like is divided into six cell chambers with a partition wall inside a unit battery, and the cell elements are housed in these cell chambers to constitute six cells in total. It consists of cells. The battery for either engine start or cycle use is provided with an exhaust hole for discharging exhaust gas generated inside the battery during charging to the outside of the battery when the battery internal pressure becomes a certain value or more. There are cases where six exhaust holes are provided in the lid corresponding to each cell chamber, and there are cases where one or two lids are provided. In the latter case, exhaust gas generated in each cell chamber is provided. Are exhausted in a concentrated manner in one or two exhaust holes through an exhaust chamber formed on the back of the lid.
[0004]
For convenience of explanation, a method of exhausting the exhaust gas in each cell chamber from an exhaust hole provided corresponding to each cell chamber is called an individual cell exhaust method, and exhaust gases generated in two or more cell chambers are exhausted. A system in which exhaust is concentrated in one exhaust hole is called a one-cell concentrated exhaust system.
[0005]
Generally, a sealed battery used for starting an engine of a motorcycle or the like employs a 1-cell concentrated exhaust system, and a sealed battery used for cycle use employs an individual exhaust system for each cell.
[0006]
As described above, the exhaust system differs depending on the application. In the case of engine start, the amount of electricity consumed for engine start is compensated by charging immediately after the engine starts, and the battery discharge state is normally within a range of 10 to 30%. Used in. This is a state in which the burden on the battery is small, almost no gas is generated, and the internal pressure does not increase. For this reason, the exhaust valve attached to the exhaust hole hardly operates during use of the vehicle, and if it does, the capacity will drop due to long-term non-use or forgetting to remove the engine key during the life of the battery. Only when charged. Therefore, even a one-cell concentrated exhaust system does not have a short life. The 1-cell centralized exhaust system has fewer exhaust valves than the individual cell exhaust system, and has fewer man-hours for fitting the exhaust valves to the exhaust holes, which is advantageous for cost reduction. Yes.
[0007]
However, in cycle applications, the battery is often discharged to nearly 100% per cycle, and charging after discharging does not charge 105 to 110% of the discharge amount in consideration of charging efficiency in order to ensure 100% of the charged state. Therefore, it is in an overcharged state where gas is generated at the end of charging. In each cell, the charging efficiency may be slightly different due mainly to variations in the amount of electrode plate active material and the amount of electrolyte, and the timing of gas generation in each cell may differ when the discharge and charge cycles are repeated. become. When this deviation is extreme, if the battery in such a state is a single cell concentrated exhaust system, the oxygen gas generated from the cell with the fast gas generation moves to the slow cell, and the state of charge varies among the cells. And battery life is shortened. Therefore, in the cycle application in which this state occurs every time, the individual cell exhaust system that is not affected by other cells is adopted.
[0008]
[Problems to be solved by the invention]
Thus, since the exhaust system is different between the battery for starting the engine and the battery for cycle use, the battery for one application cannot be used as the battery for the other application even in the same size and shape. For this reason, two types of lids with different exhaust methods have to be prepared, leading to an increase in component costs. In particular, when the production quantity of a battery for one application is small, a mold or the like for the battery is necessary, and the cost per battery is high.
[0009]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a sealed lead-acid battery that can reduce the cost by sharing parts of batteries having different exhaust systems.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a sealed lead-acid battery having a plurality of cell chambers, wherein each cell chamber is provided with an exhaust hole corresponding to each cell chamber, and one cell chamber has A concentrated exhaust hole that is different from the exhaust hole is provided corresponding to the cell chamber, and when the individual exhaust system is adopted, the concentrated exhaust hole is closed and the gas from the exhaust hole corresponding to each cell chamber is When the one-cell exhaust system is adopted, the gas from the exhaust holes corresponding to each cell chamber is discharged to the outside through the concentrated exhaust holes. Is.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 is a perspective view in the middle of assembly showing an embodiment of the present invention adopting each cell individual exhaust system, in which a cover of an exhaust hole portion on the left end and a part of an upper cover are cut away. 2 is a schematic plan view of the present invention for each cell individual exhaust system, FIG. 3 is a cross-sectional view showing the exhaust part of the completed battery of FIG. 1, and FIG. 4 is an embodiment of the present invention that employs a one-cell concentrated exhaust system. It is the perspective view in the middle of the assembly shown, and the part similar to FIG. 1 is notched. FIG. 5 is a schematic plan view of the present invention of the one-cell concentrated exhaust system. Reference numeral 1 denotes a battery case, and the inside is partitioned into six cell chambers 3 by partition walls 2. 4 is a cover that covers the upper surface of the battery case 1, and has a convex portion 5 on the upper surface, and a concave portion 6 is formed on the upper surface of the convex portion 5. One exhaust hole 7 penetrating from the upper surface to the lower surface of the lid is formed at a position corresponding to each cell chamber 3 of the recess 6, and the recess corresponding to the third cell chamber from the left in FIG. 1 or FIG. In addition, a single concentrated exhaust hole 8 penetrating from the upper surface to the lower surface of the lid is formed.
[0013]
In order to make such a battery an individual exhaust system for each cell, an exhaust valve 9 is fitted into each cell chamber 3 in an exhaust hole 7 corresponding to one-to-one as shown in FIG. 3, and a filter 11 is mounted thereon. The exhaust part 10 is used. The central exhaust hole 8 is closed by replacing with a nested mold in advance when the lid 4 is formed, or is covered and closed with a stopper or a seal. And the upper cover 12 is attached to the recessed part 6 upper surface in which these exhaust holes 7 and 8 were formed, and the lead acid battery of this invention is produced. Reference numeral 13 denotes a hole for discharging the gas discharged from the exhaust portion 10 and accumulated in the common space 16 formed by the recess 6 and the upper lid 12 to the outside of the battery, 14 is a positive terminal, and 15 is a negative terminal. It is. Further, the filter 11 may not be provided on each exhaust valve 9 but may be provided only under the hole 13 to reduce the number. Further, the central exhaust hole 8 may be closed with an exhaust valve having a valve opening pressure equal to or higher than that of the exhaust valve 9 that closes the exhaust hole 7. In this case, the number of exhaust valves is increased, but work with a mold is not required. Therefore, there are advantages depending on the number of production.
[0014]
Further, in order to adopt the one-cell centralized exhaust method, as shown in FIG. 5, no exhaust valve is attached to the exhaust hole 7 corresponding to each cell chamber 3 on a one-to-one basis, and it corresponds to the third cell chamber 3 from the left. An exhaust valve 9 and a filter 11 are attached only to the concentrated exhaust hole 8. Then, the upper lid 12 is attached to the upper surfaces of the six exhaust holes 7, and the space between the upper lid 12 and the recess 6 is hermetically sealed to form a common space 16 for each cell. With this configuration, the exhaust gas in each cell chamber 3 except for the third cell chamber 3 from the left gathers in the common space 16 through the exhaust holes 7, and then third from the left from the third exhaust hole 7 from the left. 4 is discharged from the concentrated exhaust hole 8 together with the gas in the cell chamber 3 to the outside of the battery as indicated by the arrow in FIG.
[0015]
As described above, the lid 4 of the present invention can be easily used for both the individual cell exhaust method and the one-cell concentrated exhaust method, and the cost of the mold for the lid can be reduced.
[0016]
In both the above systems, the installation of the filter 11 can be omitted. In the 1-cell concentration method, the concentrated exhaust holes 8 may be provided in any of the plurality of cell chambers 3. In the case of a monoblock battery having a large number of cells (for example, 6 cells), the gas is concentrated in units of 3 cells. A plurality (two) of exhaust holes may be provided.
[0017]
In the above-described embodiment, the exhaust holes 7 and the concentrated exhaust holes 8 having substantially the same size and shape are provided in the third cell chamber from the left, but the sizes of both exhaust holes can be changed as necessary. Moreover, the exhaust hole 7 of a specific cell can be used as a concentrated exhaust hole, and a small exhaust hole can be formed in the same cell on the side. In this case, in order to adopt the individual exhaust system for each cell, it is only necessary to close the exhaust hole of the small hole with a stopper or a nest at the time of molding. What is necessary is just to make airtight and to form the common space of the other exhaust hole 7 and a small hole. In this case, there is an advantage that the mold can be easily manufactured from the exhaust hole considering the mounting of the exhaust valve.
[0018]
【The invention's effect】
As described above, according to the present invention, since a common lid mold can be applied to either the individual cell exhaust system or the one-cell concentrated exhaust system, the mold cost can be reduced. In addition, since there are fewer types of lids, management costs are also reduced. Therefore, an inexpensive sealed lead-acid battery can be provided.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view in the middle of assembly showing an embodiment of the present invention of each cell individual exhaust system.
FIG. 2 is a schematic plan view of the present invention of each cell individual exhaust system.
FIG. 3 is a cross-sectional view of an exhaust part in one embodiment of the present invention.
FIG. 4 is a partially cutaway perspective view in the middle of assembly showing an embodiment of the present invention of a one-cell concentrated exhaust system.
FIG. 5 is a schematic plan view of the present invention of a one-cell concentrated exhaust system.
[Explanation of symbols]
3 Cell chamber 7 Exhaust hole corresponding to each cell chamber 8 Concentrated exhaust hole 16 Common space

Claims (1)

In a sealed lead-acid battery having a plurality of cell chambers, each of the cell chambers is provided with an exhaust hole corresponding to the cell chamber, and one cell chamber is different from the exhaust hole corresponding to the cell chamber. Concentrated exhaust holes are provided, and the exhaust holes corresponding to the cell chambers are used as exhaust parts and the concentrated exhaust holes are closed, so that the gas from the exhaust holes corresponding to the cell chambers can be discharged to the outside without passing through the concentrated exhaust holes. The exhaust holes corresponding to each cell chamber are opened and the gas from the exhaust holes corresponding to each cell chamber is released to the outside through the concentrated exhaust holes. A sealed lead-acid battery characterized in that it can be discharged or either .

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