JP2011159501A - Lead-acid battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems wherein sealing structures of an individual exhaust system and a collective exhaust system used for a lead-acid battery of a conventional monoblock type battery case are different between types of the lead-acid batteries, and can not be standardized and shared; reduction of a size and weight of the battery, prolongation of service life, enhancement of efficiency of maintenance, and cost reduction or the like are restricted; as mounting and sealing of a sealing component are nearly the same, a sealing component can not be mounted at an optimal time point; and total cost reduction by optimization of cost distribution can not be carried out. <P>SOLUTION: Common cap-like sealing components and common sealing component mounting parts are arranged on two adjacent battery cells. A pressure control valve or the like, which suppresses moisture dissipation of an electrolyte and suppresses deformation caused by an inner pressure of an outer wall of a battery case and a battery cell barrier wall, is mounted thereon. A liquid injection port and gas ventilation port are opened and closed by rotating the sealing component to standardize and share the sealing structure, and problems of the cost reduction or the like of the lead-acid battery of the monoblock type battery case are improved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

 The present invention relates to a lead acid battery having a plurality of battery cells.

Conventional exhaust methods for internally generated gas of the lead-acid battery are generally an individual exhaust method and a collective exhaust method. In the individual exhaust system, a battery plug is screwed into a liquid injection port for each battery cell provided on the battery case lid or a pressure control valve is directly mounted, and the battery cell is exhausted. The liquid stopper is equipped with a splash-proof body, an explosion-proof filter, a pressure control valve, and the like, and is removable. When the pressure control valve is directly mounted, the pressure control valve holding lid is fixed to the battery case lid to prevent the pressure control valve from falling off when the internal pressure rises, and the pressure control valve is generally not removable. In the batch exhaust method, a battery case upper lid for exhausting gases from the liquid injection port at once is heat-sealed to the battery case cover. In this case, since the liquid injection port is covered with the upper lid of the battery case, water cannot be replenished unless a liquid injection port is provided separately.
As described above, there are various methods for exhausting internally generated gas, that is, liquid filling and sealing methods, depending on the type of lead-acid battery as shown in the section of “Effects of the Invention” and “Mode for Carrying Out the Invention”. There have been proposed various improvement methods as shown in Patent Documents 1 to 6 regarding the injection port sealing structure, the injection method, the injection port sealing method, the related manufacturing process, the maintenance method of the lead storage battery, etc. Yes.

Patent application title: Sealed lead-acid battery and method for manufacturing the same JP 2003-142148 lead acid battery JP2003-142151 IMMEDIATE TYPE LEAD BATTERY AND METHOD OF USING THE SAME Patent 4422762 Controlled valve storage battery JP2008-146895 Lead acid battery JP 2008-186690 Lead acid battery

As described above, the liquid injection port sealing structure differs depending on the type of the lead storage battery, and the liquid injection port sealing structure is not standardized or standardized as a whole, and each liquid injection port sealing structure has the following drawbacks.
The sealing method using a liquid stopper requires a liquid stopper for each battery cell and the cost for mounting it, and the height above the electrode plate cannot be lowered due to the liquid stopper, which is an obstacle to miniaturization of lead-acid batteries. There is. The sealing method using the pressure control valve has a drawback that it requires a pressure control valve for each battery cell and the cost for mounting it, and the pressure control valve cannot be attached or detached, so that replenishment or replenishment cannot be performed when the electrolyte is reduced. The batch exhaust method requires the cost of heat-sealing the battery case lid and heat-sealing it to the battery case lid, and it is not possible to refill or replenish the electrolyte when the electrolyte is reduced unless a separate injection port and sealing plug are provided for each battery cell. There is.
In addition, the mounting of a conventional lead storage battery sealing component (liquid stopper, pressure control valve, battery case upper lid) to the liquid injection port, heat fusion to the battery case lid, and sealing are performed simultaneously with substantially the same meaning. Therefore, in a state in which the sealing part is attached, the electrolyte solution injection and the gas replacement / decompression in the apparatus cannot be performed, and the sealing part cannot be attached in advance at the optimal time before sealing. In addition, the VA (value analysis) of sealing-related parts is premised on the same meaning for the installation and sealing of sealing parts, and the improvement effect is also limited to this range. Furthermore, it is necessary to install and manage the sealing part mounting device in the production line after the liquid injection, which causes a reduction in the operating rate of the entire manufacturing line due to the trouble of the sealing part mounting device.

The present invention has been devised in view of the problems as described above to solve the problem, and for a plurality of adjacent battery cells, the sealing parts common to the plurality of adjacent battery cells and the plurality of adjacent adjacent battery cells. By providing a common sealing part mounting part for all types of battery cells, it is possible to standardize and standardize the sealing structure and sealing-related parts for each type of lead-acid battery, while reducing the size and weight, extending the service life, and storing it. It is an object of the present invention to provide a lead storage battery capable of improving the efficiency of maintenance work, rehydrating and replenishing water as needed, and improving safety. Here, the plurality of adjacent battery cells refers to two adjacent battery cells in a 12V lead acid battery in which battery cells are arranged in series, such as a 24V system or a 36V system in which the battery cells are arranged in a grid. In the lead storage battery, it means four or two adjacent battery cells. In addition, we will reduce the total cost by VA (value analysis) from a new viewpoint of the injection port sealing structure that allows injection and gas replacement / depressurization inside the device with the sealing parts attached. That is, another object of the present invention is to provide a lead-acid battery whose total cost is reduced by optimally allocating component costs, equipment-related costs, and labor costs, because the sealing parts can be mounted at an optimal time.

A first invention made to solve these problems is a lead-acid battery having a plurality of battery cells, wherein a sealing part mounting portion common to the plurality of adjacent battery cells is provided for the plurality of adjacent battery cells. Provided with an electrolyte solution injection path for each battery cell and an external air passage common to each of the battery cells or the plurality of adjacent battery cells in the sealing component mounting portion. The lead storage battery is characterized in that the electrolyte solution injection passage is sealed by mounting a component on the sealing component mounting portion. The sealing component mounting method includes various methods such as press-fitting, screwing, and abutting according to the shape of the sealing component and the sealing component mounting portion, and the cap-shaped sealing component is mounted on the sealing component. The method of externally detachably fitting to the part is the simplest and can provide a safety valve function. The external air passage is used for exhaust or intake or both, and an explosion-proof filter is provided if necessary.

The second invention is characterized in that moisture in the gas generated in the battery cell is condensed and condensed, and an exhaust chamber for each battery cell connected to the external air passage is further provided in the sealing part mounting portion. The lead storage battery according to the first invention. The exhaust chamber passes through small chambers divided as much as possible in order to improve the condensation / condensation capability, and is provided with a step or a gradient on the bottom surface so that the condensed and condensed water flows back into the battery cell. Further, the exhaust chamber is provided in the sealing part mounting portion that is integrally formed with the battery case lid, so that the upper surface is formed in an open state, but the upper surface is preferably sealed with the sealing part. . The integral molding is possible even when the upper surface is sealed and the bottom surface is opened, but a separate bottom member for each battery cell is required, resulting in an increase in cost.

A third invention is the first or second invention, wherein a pressure control valve for controlling the pressure in the battery cell by opening and closing the external air passage is further provided in the sealing part mounting portion. Such a lead storage battery. The pressure control valve includes a pressurization control valve for controlling the rising pressure in the battery and a pressure reduction control valve for controlling the pressure reduction in the battery. Either one or both are used.

According to a fourth aspect of the present invention, in the configuration of the third aspect, when only the pressurization control valve for controlling the rising pressure in the battery cell is provided, a micro-ventilation passage that can be continuously vented is opened to the outside. A lead-acid battery according to a third invention characterized by the above. The micro air passage is provided in order to converge the internal pressure in the battery cell to the atmospheric pressure with a slight air flow amount that hardly affects the water loss of the electrolytic solution. Finally, all the battery cells converge to the same pressure (atmospheric pressure), and plastic deformation due to the pressure difference between the outer wall of the battery case and the partition walls between the battery cells is prevented.

According to a fifth aspect of the present invention, in order to optimize the wall thickness of the partition wall, the pressure control valve is configured such that the partition wall thickness between the common battery cells is thinner than the partition wall thickness between the other battery cells. It is the lead acid battery concerning 3rd invention characterized by the above-mentioned. The partition wall between battery cells of the battery case that does not share the pressure control valve is subjected to a differential pressure generated by the variation in the opening / closing operation pressure between the pressure control valves, so it is necessary to increase the thickness in consideration of the differential pressure. However, since the differential pressure does not occur in the partition wall where the pressure control valve is common, the wall thickness can be reduced. The partition walls between the battery cells of the battery case lid that do not share the pressure control valve need not necessarily be thick because the pressure receiving area is small and reinforced with the battery case cover.

According to a sixth aspect of the present invention, there is provided a partition wall between battery cells not sharing the pressure control valve in order to suppress partition wall deformation between the battery cells not sharing the pressure control valve, which is generated due to variation in the opening / closing operation pressure between the pressure control valves. A lead storage battery according to the third or fifth aspect of the present invention, characterized in that a micro vent is provided in the battery. The minute ventilation hole is provided with a minute hole in the partition wall of the battery case lid, or a portion that is not thermally fused by providing a notch such as a small triangle in a heat fusion part between the battery case and the battery case. The shape of the cut is not particularly limited to a triangle as long as the minute ventilation hole can be formed.

In a seventh aspect of the present invention, the sealing component mounted on the sealing component mounting portion enables the injection of electrolyte or gas replacement in the battery cell in a state where the sealing component is mounted on the sealing component mounting portion. The first mounting state in which the electrolyte injection passage is constituted by the sealing component mounting portion and the sealing component, and the electrolyte injection passage is sealed by the sealing component. The lead-acid battery according to any one of the first to sixth aspects, wherein the second mounting state is configured to be selectively maintainable.

The eighth invention provides at least one of the external ventilation path, the external ventilation path opened and closed by the pressure control valve, or the external ventilation path provided with the minute ventilation path and opened and closed by the pressurization control valve. The lead-acid battery according to any one of the first to seventh inventions, wherein one is provided in the sealing part without being provided in the sealing part mounting part. This structure in which a part of the function of the sealing part mounting part is transferred to the sealing part is a structure for simplifying the shape of the sealing part mounting part and securing a larger area of the exhaust chamber.

The effects of the present invention include the effects common to each type of lead-acid battery and the individual effects that differ for each type. The individual effects that differ for each type are shown below for typical types. In addition, a lead storage battery having a similar structure has the same effect as the following typical types of lead storage batteries. (For the individual effects on typical types of lead-acid batteries, refer to the contents described in the section “Mode for Carrying Out the Invention”)

1) Effects common to each type of lead-acid battery Common effects when the first to sixth inventions are adopted are described below.
a) For each type of lead-acid battery, the number of sealing parts and sealing part mounting parts is reduced to less than half compared to the individual exhaust system, and the sealing structure and sealing-related parts can be shared and standardized. Total cost is reduced.
b) At any stage of product inventory, distribution, storage, and use, deformation of the outer wall of the battery case and the battery cell partition wall is suppressed, and various problems due to plastic deformation of the battery case and electrolyte leakage due to battery case cracking Is prevented. As a result, the design conditions for the material and thickness of the battery case are relaxed, and weight reduction and cost reduction are possible.
c) When the cap-shaped sealing part is detachably fitted to the sealing part mounting part, an emergency gas release valve that releases internal gas when the battery internal pressure rises abnormally and prevents cracking or rupture of the battery case Can be substituted, so that it is not necessary to provide the emergency gas release valve separately, and safety is improved.
d) In addition, the common effect of adopting the seventh invention is that the sealing part can be mounted at the optimal time, so that the part cost (part cost / part management cost) and the equipment related cost (capital investment) Total cost reduction by optimizing the cost allocation including the total production line utilization rate and labor cost (direct / indirect) and labor cost (direct / indirect).

2) Individual effects on starting lead-acid batteries with control valves.
A liquid lead-acid battery for starting an automobile is a lead-acid battery that has a sufficient amount of electrolyte and has a gas discharge port for an internally generated gas (water electrolysis gas, water vapor, electrolyte mist) always open. However, water replenishment is necessary due to the loss of water in the electrolyte during the period of use. On the other hand, the pressure control valve that operates only when the internal pressure rises is attached to the gas discharge port to suppress the loss of moisture and start with a control valve type start-up storage battery that does not require rehydration or a control valve Lead storage batteries have been proposed. In contrast, the first embodiment adopting the second, third, fourth and seventh inventions and the second embodiment adopting the second, third, fifth, sixth and seventh inventions. And the effect in Example 3 is described below.
a) Since the height above the electrode plate can be lowered without using a conventional liquid stopper, a split exhaust lead acid battery capable of being miniaturized can be provided. In addition, compared with the package exhaust type lead-acid battery that is also adopted for miniaturization, it does not require heat fusion to the upper lid or the battery case lid of the upper lid, and it is a note for each battery cell for water replenishment. There is no need to provide a liquid port and a sealing plug separately, and the parts cost, molding die cost, and mounting cost necessary for these are reduced.
b) The amount of water lost in the electrolytic solution is equal to or less than that of the conventional control valve type lead acid battery, and a long life start lead acid battery that does not require rehydration can be provided at low cost. Especially in Example 2 and Example 3, the service life is significantly extended. Also, if rehydration is necessary, it can be done on-board at any time.
c) Maintenance work such as supplementary charging to prevent battery case deformation is not required during the storage period, and compared to the current situation where this is necessary, the equipment burden and storage cost on the receiving side in product inventory / distribution / storage, especially in import / export Reduction effect is great.

3) Individual effects on ready-to-use lead-acid batteries with control valves.
Ready-to-use lead-acid batteries are used for starting automobiles, etc., but are used if products are stocked, distributed and stored in a state where the electrolyte is discharged and sealed after the battery is formed, and the electrolyte is injected before use. Lead-acid battery that can be used. On the other hand, the effect in Example 4 which employ | adopted the structure substantially the same as Example 2 and Example 5 which employ | adopted the structure substantially the same as Example 3 is described below.
a) The same effect as the item a) of the individual effect on the starting lead-acid battery with the control valve is obtained.
b) The same effect as the item b) of the individual effect on the starting lead-acid battery with the control valve is obtained.
c) It has the same effect as the item b) of the individual effect on the starting lead-acid battery with the control valve. Furthermore, it is not necessary to separately attach or remove the liquid stopper for immediate use, and the liquid injection work is greatly simplified.

4) Individual effects on control valve type lead acid batteries.
The negative electrode absorption control valve type lead acid battery is used for starting automobiles, etc., but the negative electrode plate absorbs oxygen gas generated from the positive electrode plate during charging by suppressing the amount of electrolyte and partially exposing the electrode plate. Thus, in the sealed lead-acid battery in which the disappearance of moisture is suppressed, the pressurization control valve for releasing the internal gas when the internal gas pressure increases is provided in the liquid injection port. On the other hand, the effect in Example 6 which employ | adopted the structure substantially the same as Example 2 or Example 3 is described below.
a) Since the height above the electrode plate can be lowered without using the liquid stopper, a split exhaust type lead-acid battery capable of being miniaturized can be provided. Installation steps such as heat fusion of the control valve pressing cover and the pressing cover to the battery case cover, which have been necessary in the past, are unnecessary, and the cost is reduced. In addition, since the water can be replenished at any time due to the presser lid, the life can be further extended.
b) The same effect as the item b) of the individual effect on the starting lead-acid battery with the control valve is obtained.
c) It has the same effect as the item b) of the individual effect on the starting lead-acid battery with the control valve.
d) The reduced pressure injection method has the effect of stabilizing the discharge capacity and improving the life of the lead-acid battery by reducing the variation in formation within the positive and negative electrode plates and between the battery cells.

5) Individual effects on 24V or 36V lead acid batteries.
In 24V and 36V lead acid batteries, the battery cells are arranged in a grid. On the other hand, the effect in Example 7 which employ | adopted this invention is described below.
a) Compared to the individual exhaust type 24V or 36V lead acid battery, the number of the sealing parts and the sealing part mounting part is greatly reduced, and the part cost (part cost / management cost) and the mounting cost are reduced. The 24V series from 12 sets to 3 sets, 36V series from 18 sets to 5 sets (4 sets common to 4 battery cells and 1 set common to 2 battery cells) or 6 sets (3 sets common to 4 battery cells and 3 sets common to 2 battery cells) ).
b) It has the same effect as a 12V lead-acid battery of the same type.

External appearance explanatory drawing of the 2nd mounting state of the lead acid battery of Example 1, 2, 4, 6. It is explanatory drawing which shows the 1st, 2nd mounting state of the lead livestock battery of Example 1, 2, 4, 6 and demonstrates a liquid injection path | route and a gas discharge | release path | route. FIGS. 2-1 and 3 are explanatory diagrams (plan view, cross-sectional view) showing the first mounting state, and FIGS. 2-5 and 6 are explanatory diagrams (plan view) showing the second mounting state in which the sealing part is rotated 180 degrees. FIGS. 2-2, 4 are explanatory views (plan view, cross-sectional view) of the sealing part mounting portion excluding the sealing part, the pressure control valve, and the explosion-proof filter. External appearance explanatory drawing of the 2nd mounting state of the lead acid battery of Example 3, 5, 6. FIG. It is explanatory drawing which shows the 1st, 2nd mounting state of the lead livestock battery of Example 3, 5, and 6, and also demonstrates a liquid injection path | route and a gas discharge | release path | route. FIGS. 4-1 and 3 are explanatory diagrams (plan view, cross-sectional view) showing the first mounting state, and FIGS. 4-5 and 6 are explanatory diagrams (plan view) showing the second mounting state where the sealing part is rotated 180 degrees. FIGS. 4-2 and 4 are explanatory views (a plan view and a sectional view) of the sealing part mounting portion excluding the sealing part. Exhaust paths and intake paths will also be described with reference to the control valve mounting portions of the first to sixth embodiments. 5A and 5B are explanatory views of the pressurization control valve mounting portion, and FIG. In the explanatory view showing the first and second mounting states of the lead-acid battery when the pressurization control valve mounting portion 8j of the first and second embodiments is provided for each battery cell, the gas discharge path will also be described. FIG. 6A is an explanatory diagram illustrating the first mounting state, FIG. 6-3 is an explanatory diagram illustrating a second mounting state in which the sealing component is rotated 180 degrees, and FIG. 6-2 is a sealing component excluding the sealing component. It is explanatory drawing of a mounting part. It is explanatory drawing which shows the 1st, 2nd mounting state of the lead live battery at the time of providing the pressurization control valve mounting part 8j and pressure reduction control valve mounting part 8t of Example 3 for every battery cell, and also about a gas discharge path | route. explain. FIG. 7-1 is an explanatory diagram showing the first mounting state, FIG. 7-3 is an explanatory diagram showing a second mounting state in which the sealing component is rotated 180 degrees, and FIG. 7-2 is a sealing component excluding the sealing component. It is explanatory drawing of a mounting part. It is explanatory drawing at the time of not providing a pressurization control valve and the micro groove | channel for regular ventilation in a sealing component mounting part, but providing in a sealing component. It is explanatory drawing at the time of providing a pressure-reduction control valve in a sealing component, without providing in a sealing component mounting part. FIG. 7 is an external appearance explanatory view (plan view) of the first and second mounting states of the 24V lead storage battery of Example 7.

Since the specific sealing structure differs somewhat depending on the type and application of the lead storage battery, the sealing structure of the present invention will be described below for a typical type of lead storage battery. However, the following description items show typical examples, and are also applied to lead storage batteries having a similar structure, and are not limited to the description examples. In addition, the same reference numerals are used for those having the same function as much as possible.

1) Lead-acid storage battery with control valve (1)
Embodiments for the lead-acid storage battery for starting having the pressure control valve adopting the second, third, fourth and seventh inventions will be described below. In the conventional lead-acid battery for control valve type starting, the amount of electrolyte is suppressed, and the injection port is provided in each battery cell, and each is sealed with the pressure control valve or the liquid stopper with the pressure control valve, In this embodiment, a liquid type lead acid storage battery having a sufficient amount of electrolytic solution is used except for the liquid inlet sealing structure, and the two adjacent battery cells have a common sealing against the two adjacent battery cells. Provided with a component mounting part, an electrolyte injection passage (injection port) for each battery cell, and an exhaust chamber for each battery cell for condensing and condensing moisture in the gas generated in the battery cell In addition, the common external ventilation opening having the micro ventilation path for the continuous ventilation and having the pressurization control valve mounted thereon is provided. The common sealing part has a cap shape and is provided with a liquid injection port for each battery cell and the common gas discharge port.
The configuration and operation of each component are as follows. (See Figures 1, 2, and 5)

a) Other than the liquid inlet sealing structure of the present embodiment, the conventional liquid type lead storage battery for start-up is used, and a positive / negative electrode plate and a separator are built in a 6-cell monoblock battery case. The tank lid is heat-sealed to form external terminals. The positive / negative electrode plates and the positive / negative external terminals are electrically connected before heat-sealing the battery case lid. In this example, only the liquid inlet sealing structure related to the battery case lid will be described in detail.
b) The sealing part mounting portion 8a is integrally formed with the battery case lid 8 made of synthetic resin. The sealing part mounting portion 8a has a slightly conical disk shape with a center on the battery cell partition wall 8b, and has a pilot hole 8c for the tapping screw 11 at the center of the upper surface. Inside, a continuous exhaust chamber 8d divided by a liquid injection port 8h and an exhaust chamber partition wall 8e for each battery cell, and a columnar portion 8g for sealing the liquid injection port 10h of the sealing component 10 in the second mounted state are provided on the bottom surface. The gas inlet 8f is provided, and the common pressurizing control valve mounting portion 8j is provided on the battery cell partition wall 8b. The shape of the gas inlet 8f is preferably a rectangle of 1 to 3 mm × 2 to 4 mm. The upper end surface of the exhaust chamber partition wall 8e that comes into contact with the inner surface of the sealing part 10 has a U-shaped shape with a minimal contact area in order to avoid sticking. An exhaust throttle narrow vertical groove 8i is provided between the exhaust chamber 8d of each battery cell and the pressurization control valve mounting portion 8j. Most of the moisture / electrolyte mist in the generated gas is condensed in the exhaust chamber 8d until it reaches the narrow vertical groove 8i for exhaust throttling, and is condensed and recirculated into the battery cell. However, the exhaust throttle narrow vertical groove 8i prevents the generated gas of each battery cell from flowing directly into the adjacent battery cell as much as possible. The pressurizing control valve mounting portion 8j is provided with a columnar projection 8k having a conical sealing surface 8m at the center and a ventilation vertical groove 8p at the periphery. Two to three micro-grooves 8n for ventilation are always provided on the sealing surface 8m. The dimensions of the micro-groove 8n for continuous ventilation are about 1 mm in height and about 0.4 mm in width. The bottom surface of the exhaust chamber 8d is formed so that the bottom surface of the exhaust chamber having the gas inlet 8f is sequentially raised to the lowest position to condense and condense moisture / electrolyte to flow back into the battery cell from the gas inlet 8f. A lower cylindrical portion 8q is provided at the lower part of the gas inlet 8f to make it difficult for the electrolyte or splashes to flow directly into the gas inlet 8f. A step-like discharge path 8r is provided inside, and a side wall is provided on the side wall. A narrow ventilation slit 8s is provided. The discharge path 8r changes the cross section of the path in order to make it difficult for the electrolytic solution or the splash of electrolytic solution to directly flow into the exhaust chamber 8d. Instead of the discharge path 8r, a splash-proof body that is mounted inside a conventional liquid stopper may be mounted inside the lower cylindrical portion 8q.
c) Pressurize the pressurization control valve 13 that opens at 5 to 15 kPa into the pressurization control valve mounting portion 8j and press the explosion-proof filter 12 into the cylindrical portion 13a of the pressurization control valve 13 in an airtight manner. The pressurization control valve 13 is made of an elastic body such as synthetic rubber, thermoplastic elastomer, or synthetic resin, and includes a cylindrical portion 13a and a thin valve 13b, and has a gas discharge port 13c at the center of the thin valve 13b. The pressurization control valve 13 and the explosion-proof filter 12 are not only held by press-fitting, but also pressed by the head portion 10a of the sealing part 10 so as not to drop off. Further, either the pressurization control valve 13 or the explosion-proof filter 12 is pressed against the inner surface of the head 10a in an airtight manner. When there is a concern about sticking of the sealing surface of the thin valve 13b, it is better to apply a sealing agent such as silicon oil or grease to the sealing surface. Or you may coat a fluororesin etc.
d) The cap-shaped sealing part 10 that also serves as the emergency gas release valve is made of an elastic body such as synthetic rubber, thermoplastic elastomer, or synthetic resin, and includes a head 10a and thin ribs 10b on the outer periphery. The head 10a is provided with a hexagonal head 10d for rotation and a mounting hole 10c for the tapping screw 11 at the center, and two liquid injection ports 10h and the common gas discharge port 10j at the outer periphery. The valve opening pressure of the sealing component 10 is set to a pressure that does not crack the battery case, for example, 25 to 35 kPa. The sealing part 10 is airtightly detachably fitted to the sealing part mounting part 8a of the battery case lid 8 on which the pressurization control valve 13 and the explosion-proof filter 12 are mounted, and is fixed rotatably with a tapping screw 11. To do. Instead of using the tapping screw 11, a press-fitting pin with a flange may be press-fitted. Further, in order to improve sealing performance and reduce rotational resistance during sealing, a lubricating sealant such as silicon oil or grease is applied to at least the inner surface of the thin rib 10b. Or you may coat a fluororesin etc.
e) The battery case lid 8 to which the sealing part 10 is attached is heat-sealed to the battery case in which the positive and negative electrode plates and the separator are incorporated, and can be injected from the liquid injection port 10h. It is better to purchase and store the battery case lid 8 with the sealing part 10 in the first mounting state and put it into the production line. In this case, if the three gas discharge ports 10j are sealed with a continuous adhesive tape, they are easy to peel off during the rotation of the sealing process, and dust does not accumulate on the explosion-proof filter 12 during storage. It is not polluted by the electrolyte during the chemical conversion process. If the sealing part 10 is not installed in the production line, the pressurization control valve 13 and the explosion-proof filter 12 can be purchased and stored in the battery case cover or before the sealing part 10 is installed. Either it is attached, but it is better to purchase and store it while attached to the battery case lid. If it is purchased without mounting the sealing part 10, there is an advantage that the sealing part 10 is not contaminated with the electrolytic solution in the process of injecting electrolyte or forming a battery case. There is a disadvantage that it is necessary to install and manage the sealing parts 10 and to supply the sealing parts 10 and the like.
f) The generated gas during the formation of the battery case is directly discharged to the outside from the liquid injection port 10h for each battery cell. Next, if necessary, after adjusting the concentration and amount of the electrolytic solution, the sealing component 10 is sealed by half-turning. The sealing component 10 is held by the frictional force between the thin rib 10b and the outer peripheral wall of the sealing component mounting portion 8a and the tapping screw 11, the liquid injection port 10h is sealed by the columnar portion 8g, and the gas discharge port 10j is the explosion-proof filter 12. It is located above.
g) The internally generated gas (water electrolysis gas / water vapor / electrolyte mist) flows from the stepped discharge path 8r of the lower cylindrical portion 8q through the gas inlet 8f and flows into the exhaust chamber 8d. Moisture and electrolyte condensed and condensed in the exhaust chamber 8d recirculate into each battery cell through the gas inlet 8f, and the others are pressurized from the gas exhaust vertical groove 8p via the narrow exhaust vertical groove 8i. It flows into the valve mounting part 8j. If the amount of gas is small, such as during self-discharge, the gas vent 13c of the pressurization control valve 13 and the explosion-proof filter 12 pass through the constant ventilation micro-groove 8n on the sealing surface 8m, and go out of the battery through the gas discharge port 10j. Released.
h) The gas discharge path shown in FIG. 2 is an example and is not limited to this. However, when it is necessary to reverse the lead storage battery and discharge the electrolyte from the liquid injection port 8h, the liquid injection port It is necessary to arrange 8h and the gas inlet 8f as far apart as possible in the width direction of the lead storage battery so that the electrolyte does not flow into the gas inlet 8f. In addition, the external terminals are also arranged so as to be upward when they are reversed so that they are not contaminated with the electrolyte. Similarly, the gas discharge port 10j is arranged so as to be on the upper side or sealed with a continuous tape as described above.
i) When a large amount of gas is generated due to large current charging, etc., and the internal pressure rises above the opening pressure of the pressurization control valve 13, the gap formed between the sealing surface 8m by deforming the thin valve 10b outward The internal gas is also released from. Since this gas discharge method can reduce the height above the electrode plate as compared with the conventional liquid stopper mounting method, it is possible to provide a split exhaust type lead-acid battery that can be miniaturized. In addition, it does not require heat fusion to the battery lid of the top cover or top cover required for the package exhaust type lead-acid battery adopted for miniaturization, and the liquid inlet and seal for each battery cell required for water replenishment There is no need to provide a plug separately, and the parts cost, molding die cost, and mounting cost required for these components are reduced.
j) As described in the above-mentioned “Patent Document 5 Japanese Patent Application Laid-Open No. 2008-146895 Lead Acid Battery”, the lead acid battery is always slightly opened to the outside by the micro-groove 8n for constant ventilation, and the internal pressure of any battery cell is Since it converges to atmospheric pressure, no differential pressure is generated between the battery cells. For this reason, pressure that causes plastic deformation is not constantly applied to the outer wall of the battery case or the partition walls of the battery cells. Therefore, at any stage during product inventory, distribution, storage, and use, pressurization and decompression of the outer wall of the battery case and the battery cell partition are suppressed, and various problems due to plastic deformation of the battery case and electrolysis due to cracks are suppressed. Liquid leakage is prevented. As a result, the battery case can be made of an inexpensive material and the thickness can be reduced, which is effective in reducing the weight and cost of the lead storage battery.
k) When the internal pressure abnormally rises above the valve opening pressure of the sealing component 10 during use of the battery due to an internal short circuit or the like, the head 10a of the sealing component 10 and the thin rib 10b on the outer peripheral portion are deformed. As a result, the gas flows into the sealing part mounting part 8a on the adjacent battery cell side, and the internal gas is released from the gap formed between the sealing part mounting part 8a and the outer peripheral wall of the sealing part mounting part 8a and the liquid injection port 10h. In this case, there is no need to consider the continued use of lead-acid batteries, and it is only necessary to prevent leakage and scattering of the electrolyte due to cracking or rupture of the battery case, but unlike conventional cap-shaped small explosion-proof valves, the pressure for a large pressure-receiving area Therefore, even if there is a little sticking of the sealing valve, it operates reliably and there is little change in the valve opening pressure. The thin rib 10b may be provided with a partial thin wall portion or a small cutout portion so that the thin rib 10b is reliably expanded and broken. Since the sealing component 10 is held by the tapping screw 11 and the positional relationship with the sealing component mounting portion 8a does not change, it does not fall off after the operation and returns to the original mounting state.
l) Although there is very slight ventilation due to the always fine ventilation groove 8n, the water loss of the electrolyte due to the attachment of the pressurization control valve 13 is described in the above-mentioned “Patent Document 5 Japanese Patent Laid-Open No. 2008-146895 Lead Acid Battery”. Therefore, replenishment of the battery is usually almost unnecessary and the life of the lead-acid battery is extended.However, if the sealing part 10 is rotated half a turn, it can be replenished without removing the sealing part 10 at any time. Water can be replenished with the lead-acid battery mounted on the vehicle body.
m) If the continuous sheet 15 common to the gas discharge port 10j is attached as shown in FIG. 1, the influence of the air current around the lead storage battery is eliminated, the amount of water loss is reduced, and the accumulation of dust in the gas discharge port 10i is reduced. Will also disappear. In order to secure the gas discharge path, the adhesive of the continuous sheet is limited to the shaded portion.
n) The above is the case where the pressure adjusting valve 13 is used in common. However, as shown in FIG. 6, the inside of the sealing part mounting portion 8a is separated for each battery cell, and the pressure adjusting valve mounting portion 8j is connected to the battery cell. You may provide for every. In this case, the gas discharge port 10i of the sealing part 10 is also used as the liquid injection port 10h. In most cases, the starting lead-acid battery is mounted in a high-temperature engine room, and the temperature of the battery cells at both ends becomes higher, and the moisture evaporation of the electrolytic solution tends to increase more than the inner battery cells. Therefore, when the pressure adjusting valve 13 common to the battery cell at the end and the battery cell at the inner side is used, depending on the use conditions, the inner battery from the battery cell at the end can be changed even if there is a narrow vertical groove 8i for exhaust throttling. There is a possibility that a gas containing moisture unilaterally flows into the cell, and the electrolyte of the inner battery cell increases and overflows due to long-term use of the lead storage battery. For this, use this structure that separates the inside of the sealing part mounting portion 8a for each battery cell, and the opening pressure of the pressurizing regulating valve 13 is made higher than the inner battery cell. Is preferable, and the thickness of the battery cell partition is also increased.
o) By adopting the above-mentioned eighth invention, the pressurizing regulating valve 13 and the constant ventilation fine groove 8n can be provided in the sealing component 10 without being provided in the sealing component mounting portion 8a. In order to provide the functions of the pressure adjusting valve 13 and the constant ventilation micro groove 8n inside the sealing part head 10a, the following structure is adopted. A pressure adjusting valve shaft mounting portion 10k for mounting the pressure adjusting valve shaft 16 is provided on the sealing component head portion 10a. The pressure regulating valve shaft mounting portion 10k includes a disk-shaped recess 101 on both upper and lower end surfaces of the sealing part head 10a, a thin valve 10n integrally formed with the sealing part 10 between the recesses 101, and a thin valve 10n. A through hole 10m having a diameter larger than that of the pressure adjusting valve central shaft 16b is provided at the center. The thin valve 10n is pressed against the sealing surface of the flange portion 16a. The thin-walled valve 10n may be a ring-shaped thin-walled valve that is not integrally molded with the sealing part 10, and may be airtightly mounted on the pressure adjusting valve shaft mounting portion 10k. The pressure adjusting valve shaft 16 includes a flange portion 16a and a central shaft 16b. The ring-shaped explosion-proof filter 12 is fixed to the center shaft 16b so that the flange portion 16a is airtightly attached to the pressure regulating valve shaft attachment portion 10k. Further, a ring-shaped groove 16d is formed on the outer periphery of the sealing surface of the flange portion 16a with the thin valve 10n, a plurality of constant ventilation microgrooves 16n are formed on a part of the sealing surface, and the ring-shaped groove 16d and the exhaust chamber 8d. A vent hole 16e is provided for connecting the two. The ventilation hole 16e is arranged so that gas flows through the exhaust throttle narrow vertical groove 8i. The material of the pressure regulating valve shaft 16 is a non-conductive material such as a synthetic resin in order to prevent ignition and explosion of the sealing valve mounting portion 8a due to external spark. The thin valve 10n is hermetically pressed against the flange portion 16a when the pressure of the sealing part mounting portion 8a is reduced, and is deformed outward when pressurized. As a result, the internally generated gas exceeding the on-off valve pressure is sent to the outside through the vent hole 16e via the ring-shaped groove 16d, the gap between the thin valve 10n and the flange portion 16a, the through hole 10m, and the ring-shaped explosion-proof filter 12. Discharged. This structure simplifies the shape of the sealing part mounting portion 8a, reduces the cost of the molding die, and secures a larger area of the exhaust chamber 8d, thereby improving the condensation / condensation capability and eliminating water in the electrolyte. The amount is reduced. (See Figure 8)
p) When the liquid injection port 10h is not provided in the sealing part 10 in the configuration of the seventh invention, the first mounting state and the second mounting state cannot be selectively maintained, The mounting of parts 10 and sealing are synonymous, and there is no common effect of total cost reduction by optimizing the cost distribution mentioned above and no individual effect of water replenishment without removing sealing parts 10, but all other effects are possible. is there. In this case, the columnar portion 8g for sealing the liquid injection port 10h is naturally unnecessary. In addition, since the shape of the sealing part mounting portion 8a can be a rectangle that does not consider the rotation of the sealing part 10, it is possible to improve the condensation / condensation capability by expanding the area of the exhaust chamber 8d.

2) Lead-acid storage battery with control valve (2)
For liquid-type starting with a control valve that adopts the second, third, fifth, sixth, and seventh inventions that do not have the above-described micro-ventilation passage (always micro-groove 8n). Examples for lead-acid batteries are described below. Since the present embodiment is the sealing structure of Example 1 except that there is no microscopic groove 8n for constant ventilation and the battery cell partition wall 8b is partially different, the description of the same configuration part is omitted and the different configuration part is omitted. Only listed. (See Figures 1, 2, and 5)

In the present embodiment, since there is no always fine ventilation groove 8n, the battery cell is sealed for each pressurization control valve 13. For this reason, as described below, there are advantages that lead-acid batteries have a longer life and disadvantages that the battery case is easily deformed, and the measures described below are taken for the disadvantages.
a) The advantage is that the battery cell is sealed by the pressurization control valve 13, so that not only the electrolyte depletion is further suppressed and the service life is extended, but also the control valve can be used even if the electrode plate is exposed due to liquid reduction. It will operate as a lead-acid battery, and as shown in the above-mentioned “Patent Document 2 Japanese Patent Application Laid-Open No. 2003-142148 Lead-acid battery”, the life is significantly extended. The lead storage battery of the present embodiment having an exhaust chamber for condensation / condensation of the electrolytic solution has a longer life because the liquid reduction of the electrolytic solution is further suppressed than the lead storage battery of Patent Document 2 that does not have the exhaust chamber.
b) The first disadvantage is that it cannot cope with the internal decompression that occurs during the storage period, and the battery case is deformed or cracked as described in "Patent Document 4 Patent 4224762 Control Valve Lead Acid Battery". There is a risk of leakage of electrolyte and performance (discharge capacity / lifetime). Inside the lead-acid battery after battery cell formation, the partial pressure of water vapor, electrolyte mist, and oxygen gas / hydrogen gas generated in the positive and negative electrode plates is high, and if this is sealed (sealed) in this state, the oxygen gas will be negative during the storage period. The hydrogen gas passes through the battery case and is released to the outside, and the water vapor / electrolyte mist is condensed. Therefore, the inside of the lead storage battery is depressurized during the storage period, and this may cause cracks and electrolyte leakage due to creep deformation of the outer wall of the battery case, and performance deterioration due to irreversible deformation of the separator due to battery cell partition deformation. As a countermeasure, the space inside the lead-acid battery is replaced with nitrogen gas before sealing (sealing) to prevent decompression during storage. In the case of the present embodiment, the injection port 10h having a sufficient diameter not equipped with the pressure control valve is open to each battery cell, so that a sufficient level of nitrogen gas can be obtained by inserting a nitrogen gas nozzle here. Replacement is easy. Thereafter, the sealing part 10 is sealed by half-turning. The nozzle opens to the side of the tip, and nitrogen gas is blown to the side so as not to blow directly onto the electrolyte.
c) The second disadvantage is that the internal pressure of the battery cell does not converge to atmospheric pressure, and a differential pressure is generated between the battery cells where the sealing component 10 is not common due to the variation in the open / close pressure between the pressurization control valves 13. It is to be. Although this differential pressure is small but the pressure receiving area is large, if the battery cell partition wall of the battery case part is not repulsively supported by the electrode plate group without applying group pressure to the electrode plate group, the partition wall may be greatly deformed to one side. There is. When the partition wall is greatly deformed, the electrolytic solution surface becomes higher and the other becomes lower due to a change in the volume of the battery cell, and there is a risk of overflow of the electrolytic solution or strap corrosion. For this, the measures according to the fifth and / or the sixth invention are implemented.
d) According to the fifth aspect of the present invention, the cost is reduced and the weight is reduced while preventing the inconvenience. In addition, it is better to provide a plurality of narrow thin vertical grooves on both sides of the partition wall where the pressure regulating valve 13 is not common so that the electrolyte passage can be secured even if the partition wall and the electrode plate are in close contact with each other. Good.
e) According to the sixth invention, as in the fifth invention, the cost is reduced and the weight is reduced while preventing the problems. The measures according to the fifth and sixth inventions may be implemented in parallel. The area of the micro vent is preferably 10% or less of the area of the gas inlet 8f. The micro vent is for converging the pressure of adjacent battery cells to the same pressure, and most of the gas generated in the high-pressure battery cell flows into the exhaust chamber 8d to condense and condense moisture. And reflux the electrolyte. Since all the battery cells communicate with each other through the sealing valve 10 and the minute ventilation hole, they finally converge to the same pressure. If the area of the micro vent is increased, a large amount of generated gas flows directly from the battery cell on the high-pressure side to the low-pressure side. Since equilibrium occurs, it must be avoided. This method has the advantage that the specification change of the battery case is not required and only the specification of the battery case lid is changed, and a new molding die cost is not generated.
f) As described above, in any stage of product inventory, distribution, storage, and use, the lead-acid storage battery with a control valve that suppresses the deformation of the outer wall of the battery case and the battery cell partition wall is used, and the above-described plastic deformation of the battery case Electrolyte leakage due to defects and cracks is prevented. As a result, the battery case can be made of an inexpensive material and the wall thickness can be reduced, which is effective in reducing the weight and cost of the lead storage battery. In addition, the maintenance work for preventing plastic deformation of the battery case due to a change in internal pressure during storage, which was conventionally required for a start-up lead-acid battery with a control valve type or with a control valve, is no longer necessary. In particular, it is very effective in reducing the equipment burden and storage costs on the receiving side in import and export. Further, the starting lead-acid battery of the present embodiment is a starting lead-acid battery with a control valve whose life is significantly extended from that of the first embodiment at substantially the same cost as the first embodiment. Moreover, this structure is applicable also to lead acid batteries other than the starting lead acid battery.
g) The above is the case where the pressure adjusting valve 13 is the same as the above, but as in the first embodiment, the inside of the sealing valve mounting portion 8a is separated for each battery cell, and the pressure adjusting valve mounting portion 8j is set for each battery cell. May be provided. In this case, since each battery cell is hermetically sealed, it is better to provide the micro vent in the battery cell partition wall. (See Figure 6)
h) In the configuration of the seventh invention, the case where the sealing part 10 is not provided with the liquid injection port 10h is the same as that of the first embodiment.

3) Lead-acid storage battery with control valve (3)
Examples of the liquid type lead acid storage battery with a control valve adopting the second, third, fifth, sixth and seventh inventions will be described below. The present embodiment is substantially the same as the sealing structure of the second embodiment, but the common control valve mounting portion has two places, and the pressurization control valve and the pressure reduction control valve are mounted. Further, since the liquid injection port 10h is located above the control valve mounting portion and also serves as a gas discharge port in the second mounting state, the common gas discharge port 10j is not provided. Moreover, the nitrogen gas replacement after the battery case formation is not performed. (See Figures 3-5)
The configuration and operation of each component are as follows. In the same manner as in the second embodiment, the description is simplified or omitted.

a) Except for the injection hole sealing structure of this embodiment, the conventional lead-acid storage battery for starting is a monoblock type synthetic resin battery case with 6 battery cells, and a positive / negative electrode plate and a separator are built in. The tank lid is heat-sealed to form external terminals. Also in the present embodiment, only the injection port sealing structure related to the battery case lid will be described in detail.
b) As shown in FIG. 4, the sealing component mounting portion 8a has two control valve mounting portions, a pressurization control valve mounting portion 8j and a pressure reduction control valve mounting portion 8t, and a liquid injection port 8h and a control valve mounting portion 8j. , 8t is substantially the same as the second embodiment except that the positional relationship with respect to the rotation is a position corresponding to the rotation.
However, there is no sealing columnar portion 8g, and the pressurizing control valve mounting portion 8j is not always provided with the ventilation groove 8n.
c) The pressurization control valve 13 in which the explosion-proof filter 12 is press-fitted in an airtight manner is press-fitted in an airtight manner into the pressurization control valve mounting portion 8j, and the pressure-reduction control valve 14 is press-fitted in a pressure-reduction control valve mounting portion 8t. Both on-off valve pressures are 5-15 kPa from atmospheric pressure. The decompression control valve 14 is also made of an elastic body such as synthetic rubber, thermoplastic elastomer, or synthetic resin, and includes a cylindrical portion 14a and a cylindrical valve 14b, and has a gas discharge port 14c at the center of the cylindrical valve 14b. When there is a concern about sticking of the sealing surface of the cylindrical valve 14b, it is better to apply a sealing agent such as silicon oil or grease to the sealing surface. Or you may coat a fluororesin etc.
d) The cap-shaped sealing part 10 is the same as that of the second embodiment except that the liquid injection port 10h also serves as a ventilation port and therefore there is no gas discharge port 10j.
e) The liquid injection method, the formation of the battery case, the adjustment of the concentration and the amount of the electrolyte when necessary, and the sealing method are the same as in Example 2 except that the nitrogen gas replacement after the formation of the battery case is not performed. . However, in the second mounting state, the liquid injection port 10h is located above the pressurizing control valve mounting portion 8j and the pressure reducing control valve mounting portion 8t.
f) As described above, the internally generated gas is discharged to the outside from the liquid injection port 10h of the pressurization control valve mounting portion 8j, and the cylindrical valve 14b of the pressure reduction control valve 14 expands from the liquid injection port 10h for internal pressure reduction. Since the external air is sucked through the air inlet 14c, the battery case is not plastically deformed by pressurization or decompression.
g) For the differential pressure due to the variation in the open / close pressure between the pressure regulating valves, the measures according to the fifth and / or sixth invention are implemented as in the second embodiment.
h) As described above, the effect of the present embodiment is the same as that of the second embodiment.
i) If a common continuous sheet 15 is affixed to the injection port 10h as shown in FIG. 3, the influence of the air current around the battery is eliminated, the amount of water lost is reduced, and dust is deposited in the injection port 10h. Will also disappear. In order to secure the ventilation path, the adhesive to the continuous sheet is only the hatched portion.
j) The above is the case where the pressure adjusting valve 13 and the pressure reducing valve 14 are made common, but as in the first embodiment, the inside of the sealing part mounting portion 8a is separated for each battery cell, and the pressure adjusting valve is mounted. The portion 8j and the pressure reducing adjustment valve mounting portion 8t may be provided for each battery cell. In this case, since each battery cell is in a sealed state, it is better to provide the micro vent in the battery cell partition wall. (See Figure 7)
k) By adopting the above-mentioned eighth invention, it is also possible to provide the pressure adjusting valve 13 and the pressure reducing adjusting valve 14 in the sealing component 10 without providing them in the sealing component mounting portion 8a. In order to provide the function of the pressure reducing control valve 14 inside the sealing part head 10a, the following structure is adopted. The pressurizing adjustment valve 13 is the same as that in the first embodiment. A pressure adjusting valve shaft mounting portion 10k for mounting the pressure adjusting valve shaft 16 is provided on the sealing part head portion 10a. The pressure regulating valve shaft mounting portion 10k includes a disk-shaped recess 101 on both upper and lower end surfaces of the sealing part head 10a, a thin valve 10n integrally formed with the sealing part 10 between the recesses 101, and a thin valve 10n. A through hole 10m having a diameter larger than that of the pressure adjusting valve central shaft 16b is provided at the center. The thin valve 10n is pressed against the sealing surface of the flange portion 16a. The thin-walled valve 10n may be a ring-shaped thin-walled valve that is not integrally molded with the sealing part 10, and may be airtightly mounted on the pressure adjusting valve shaft mounting portion 10k. The pressure regulating valve shaft 16 is composed of a flange portion 16a, a central shaft 16b, and a ring portion 16c. The ring portion 16c has a central shaft 16b so that the pressure regulating valve shaft 16 is airtightly mounted on the pressure regulating valve shaft mounting portion 10k. It is fixed to. The flange portion 16a is provided with a ventilation cutout portion 16f, and the central shaft 16b is provided with a ventilation vertical groove 16g. A ventilation hole 16e may be provided in the ring portion 16c instead of the ventilation vertical groove 16g. The ventilation vertical groove 16g or the ventilation hole 16e is arranged so that external air flows into the exhaust chamber 8d via the exhaust throttle narrow vertical groove 8i. When the ring part 16c is the explosion-proof filter 12, neither the ventilation vertical groove 16g nor the ventilation hole 16e is provided. The material of the pressure regulating valve shaft 16 is a non-conductive material such as a synthetic resin in order to prevent ignition and explosion of the sealing valve mounting portion 8a due to external spark. The thin valve 10n is hermetically pressed against the flange portion 16a when the pressure of the sealing part mounting portion 8a is higher than the atmospheric pressure, and is deformed inward when the pressure is reduced, so that the gap between the thin valve 10n and the flange portion 16a is less than the ventilation cutout portion 16f. The air is sucked from the outside through the through hole 10m and the vertical groove 16g for ventilation. Similar to the case where the pressurizing adjustment valve 13 is provided in the sealing part 10, this structure simplifies the shape of the sealing part mounting portion 8a, reduces the molding die cost, and secures a larger area of the exhaust chamber 8d. As a result, the condensation / condensation ability is improved, and the amount of water lost in the electrolyte is reduced. (See Figure 9)
l) The case where the sealing part 10 is not provided with the liquid injection port 10h in the configuration of the seventh invention is the same as in the first embodiment. However, a gas discharge port is provided at a position corresponding to the pressurization control valve mounting portion 8j of the sealing component 10, and an air suction port is provided at a position corresponding to the pressure reduction control valve mounting portion 8t.
In addition, the structure of a present Example is applicable not only to the start lead acid battery with a control valve but to other control valve type lead acid batteries, and has the same effect.

4) Ready-to-use lead acid battery with control valve (1)
An example of a liquid type lead acid storage battery with a control valve adopting the sealing structure of Example 2 will be described below. The present embodiment has a sealing structure similar to that of the second embodiment, but the manufacturing process / distribution / storage method is partially different. In the case similar to the second embodiment, the description is simplified or omitted. (See Figures 1, 2, and 5)

a) The manufacturing process up to the formation of the battery case is the same as in Example 2. After the formation of the battery case, the electrolytic solution is discharged from the injection port, and after the nitrogen gas replacement is performed, the sealing component 10 is half-turned and sealed. Product inventory, distribution, and storage are performed in this state, and the sealing part 10 is opened by half-turning before use, and a predetermined electrolytic solution is injected and then half-turned again to make a finished product. This eliminates the need for maintenance work during storage to prevent battery case deformation, which was necessary in the past, and also eliminates the need to attach or remove the liquid stopper separately, making the injection work before use very simple. It becomes.
b) Responding to changes in internal pressure during product inventory, distribution, storage, and use, including effects of extending the life of lead-acid batteries, and the effects thereof are the same as in Example 2.
c) The continuous sheet 15 common to the gas discharge port 10j is the same as in the second embodiment.
d) As in the second embodiment, the inside of the sealing component mounting portion 8a may be separated for each battery cell. (See Figure 6)
e) When the pressurizing regulating valve 13 and the like are provided in the sealing part 10, the same as in the second embodiment.
f) The case of not adopting the configuration of the seventh invention and not providing the liquid injection port 10h in the sealing part 10 is the same as that of the second embodiment.

5) Ready-to-use lead acid battery with control valve (2)
An example of a liquid type lead acid battery with a control valve that employs the sealing structure of Example 3 will be described below. The present embodiment has a sealing structure similar to that of the third embodiment, but the manufacturing process, distribution, and storage method are partially different. In the case similar to the third embodiment, the description is simplified or omitted. (See Figures 3-5)

a) The production process up to the formation of the battery case is the same as in Example 3. Example 4 is the same as Example 4 except that the nitrogen gas replacement is not performed after the formation of the battery case.
b) Responding to changes in internal pressure during product inventory / distribution / storage / use and effects, including the effect of extending the life of lead-acid batteries, are the same as in Example 3.
c) The continuous sheet 15 common to the liquid injection port 10h is the same as in Example 3.
d) When the pressurizing regulating valve 13 or the like is provided in the sealing part 10, it is the same as in the third embodiment.
e) In the configuration of the seventh invention, the case where the sealing member 10 is not provided with the liquid injection port 10h is the same as that of the third embodiment.

6) Control valve type lead acid battery
A conventional negative electrode absorption control valve type lead-acid battery is provided with a liquid injection port in each battery cell, and each pressure cell is sealed (sealed) and the pressure control valve holding lid is fixed to the battery case lid. Or the above-mentioned maintenance work during storage is necessary. In some cases, the maintenance work during storage is not required by the pressurization / decompression control valve of the “Patent Document 4 Patent 4224762 Control Valve Lead Acid Battery”. These disadvantages are that when sealing with the liquid stopper, the height above the electrode plate cannot be lowered, and there is a limit to downsizing the lead-acid battery, and when sealing with the control valve, the liquid is injected for the holding lid. Is in fact not possible. On the other hand, the Example with respect to the control valve type lead acid battery which employ | adopted the sealing structure substantially the same as Example 2 or Example 3 is described below. In the case similar to the second embodiment or the third embodiment, the description is simplified or omitted. (See Figures 1-5)

a) Other than the sealing structure of the control valve type lead-acid battery, it is a conventional one, and a positive and negative electrode plate and a separator are built in a monoblock type synthetic resin battery case with 6 battery cells, and the battery case lid is heat-sealed to external terminals. Is formed. Also in this example, only the sealing structure related to the battery case lid will be described in detail.
b) The sealing part mounting portion 8a is substantially the same as in the second or third embodiment, but the lower cylindrical portion 8q is unnecessary because the amount of the electrolyte is suppressed. Further, since the water vapor flowing into the exhaust chamber 8d is condensed and condensed and then returned to each battery cell, the pressurization to the pressurization control valve due to the partial pressure of water vapor is reduced, and the valve opening probability is lowered. The amount of water loss is suppressed and the life is extended compared to a control valve type lead-acid battery without a battery.
c) The sealing part 10 is the same as in Example 2 or Example 3. Since the sealing part 10 is fixed by the tapping screw 11 and does not fall off, the presser cover, which has been necessary in the past, is unnecessary, and fixing of the presser cover to the battery case cover is not required. . This not only reduces the cost, but also makes it possible to replenish water at any time, which has not been possible with the use of the presser lid, so that the life of the lead-acid battery can be extended.
d) A pressure reducing nozzle covering the whole battery is pressed and sealed on the battery mounting table, and the inside and outside of the battery are evacuated, and then the electrolyte is injected so that the positive and negative electrode plates are completely buried. Open to atmosphere. According to this injection method, the air in the battery, including the positive and negative electrode plates and the air in the separator, is almost completely discharged before the injection, and then the electrolyte is pushed into the positive and negative electrode plates and the separator at atmospheric pressure. . This improves the rate of penetration and diffusion of electrolyte in the positive and negative electrode plates and the separator, homogenizes by eliminating bubbles, increases the amount of liquid that can be injected by reducing the apparent volume of the positive and negative plates and separator, There are effects such as stabilization of discharge capacity and reduction in the life of lead-acid batteries due to reduction of chemical variation between battery cells.
e) Battery case formation after electrolyte injection is performed by a method in which gas generated from the positive and negative electrode plates during battery case formation is suppressed by repeated charging and discharging while suppressing charging current. Adjust the concentration and volume of the electrolyte after forming the battery case. The gas generated during the formation of the battery case is discharged to the outside through the injection port 10h.
f) A part of the electrode plate of the control valve type lead-acid battery is exposed and must be stored in a sealed state to prevent oxidation. Countermeasures against pressure and pressure reduction generated in the sealed lead-acid battery and the effects thereof are the same as those in the second and third embodiments. However, in the control valve type lead storage battery in which a predetermined group pressure is applied to the electrode plate group, the battery cell partition wall is repelled and supported by the electrode plate group, and the amount of the electrolyte is suppressed. No countermeasure is required.
g) By the above, the maintenance work during storage is unnecessary, and it is possible to reduce the size, weight, and cost, and the negative electrode absorption has a longer electrolyte life than any conventional control valve type lead-acid battery. Type control valve type lead acid battery can be provided. Moreover, as shown in the above-mentioned “Patent Document 2 Japanese Patent Application Laid-Open No. 2003-142148 lead-acid battery”, if the amount of the electrolyte is not suppressed from the beginning and the amount of the electrolyte is sufficient, the electrolyte is initially reduced to the liquid lead-acid battery. For example, it becomes a control valve type lead-acid battery, and the life is further extended.
h) The above configuration includes an exhaust chamber 8d for each battery cell that condenses and condenses moisture. However, the control valve type lead storage battery is not an essential component, and the exhaust chamber 8d may be omitted. . However, the amount of water lost in the electrolyte is about the same as that of a conventional control valve type lead-acid battery, and there is no life extension effect.
i) When the sealing structure of Example 2 is adopted, the inside of the sealing part mounting portion 8a may be separated for each battery cell. (See Figure 6)
j) When the pressure adjusting valve 13 or the like is provided in the sealing part 10, it is the same as in the second or third embodiment.
k) The case of not providing the liquid injection port 10h in the sealing part 10 in the configuration of the seventh aspect of the invention is the same as in Example 2 or Example 3.

7) 24V or 36V lead acid battery
In the 24V or 36V lead acid battery adopting the first to seventh inventions, the sealing component 10 and the sealing component mounting portion 8a that are common to four adjacent battery cells are arranged in a grid shape and 12V. Different from lead-acid batteries. The external vent is either an external vent for each battery cell, an external vent common to two adjacent battery cells, or an external vent common to four adjacent battery cells. However, depending on the arrangement of the battery cells, the sealing component 10 and the sealing component mounting portion 8a common to two adjacent battery cells are also used. The internal structure of the sealing component 10 and the sealing component mounting portion 8a is substantially the same as that of Examples 1 to 6 depending on the type of the lead storage battery, but the area per battery cell of the sealing component mounting portion 8a is halved. The pressure control valve should be provided not in the sealing part mounting portion 8a but in the sealing part 10 to ensure the area of the exhaust chamber 8d. FIG. 10 shows an external appearance explanatory view of an embodiment in which the pressurizing control valve 13 for the 24V lead acid battery is provided in the sealing part 10.

8) Example Comparison Table The comparison of Examples 1 to 7 is shown in the table below.

8 Battery case lid
8a Sealing part mounting part of battery case lid
8b Battery cell partition of battery case lid
8c Tapping screw pilot hole in sealing part mounting part
8d Exhaust chamber of sealing part mounting part
8e Exhaust chamber partition wall for sealing parts
8f Gas inlet for sealing part mounting part
8g Sealing column part of sealing part mounting part
8h Injection port for sealing parts
8i Narrow vertical groove for exhaust throttling at sealing part mounting part
8j Pressure control valve mounting part of sealing part mounting part
8k Columnar projection of control valve mounting part
8m Conical sealing surface of columnar protrusion of control valve mounting part
8n Micro-grooves for continuous ventilation in the columnar protrusions of the control valve mounting part
8p Vertical groove for ventilation of control valve mounting part
8q Lower cylindrical part of sealing part mounting part
8r Stepped discharge path of lower cylindrical part
8s Ventilation slit in the lower cylindrical part
8t Pressure reducing valve mounting part of sealing part mounting part
10 Sealing parts
10a Sealing part head
10b Thin ribs on the outer periphery of the sealing part
10c Tapping screw mounting hole for sealing parts
10d Hexagon head of sealing part head
10h Injection port for sealing parts
10j Gas outlet for sealing parts
10k Sealing parts decompression adjustment valve shaft mounting part
10 l Disc-shaped recess on the pressure reducing valve shaft mounting part of the sealing part
10m Through hole in the pressure reducing valve shaft mounting part of the sealing part
10n Thin valve on the pressure reducing adjustment valve shaft mounting part of the sealing part
11 Tapping screw
12 Explosion-proof filter
13 Pressure control valve
13a Cylindrical part of pressurizing control valve
13b Thin valve of pressurization control valve
13c Gas outlet of pressurization control valve
14 Pressure reducing valve
14a Cylindrical part of pressure reducing control valve
14b Cylindrical valve of pressure reducing control valve
14c Inlet of pressure reducing control valve
15 Continuous seal for gas outlet
16 Depressurization adjusting valve stem
16a Flange part of pressure reducing adjustment valve shaft
16b Center axis of pressure reducing adjustment valve shaft
16c Ring part of pressure reducing valve shaft
16d Ventilation notch in the flange of the pressure reducing valve shaft
16e Ventilation longitudinal groove on the central axis of the pressure reducing valve shaft

Claims (8)

In a lead storage battery having a plurality of battery cells, a sealing component mounting portion common to the plurality of adjacent battery cells is provided for the plurality of adjacent battery cells, and an electrolyte solution injection for each battery cell is provided in the sealing component mounting portion. And an external air passage common to each of the battery cells or the plurality of adjacent battery cells, and mounting the sealing component common to the plurality of adjacent battery cells on the sealing component mounting portion. A lead-acid battery, wherein the liquid passage is sealed. 2. The sealing part mounting portion further includes an exhaust chamber for each battery cell that condenses and condenses moisture in the gas generated in the battery cell and is connected to the external air passage. Lead acid battery. The lead storage battery according to claim 1 or 2, further comprising a pressure control valve for controlling a pressure in the battery cell by opening and closing the external air passage in the sealing part mounting portion. 4. The structure according to claim 3, wherein when only a pressurization control valve for controlling the rising pressure in the battery cell is provided, a micro-ventilation passage that can be continuously vented is opened to the outside. Lead acid battery. 4. The lead-acid battery according to claim 3, wherein the pressure control valve has a wall thickness between the battery cells that is common to the pressure control valve thinner than a wall thickness between the other battery cells. The lead storage battery according to claim 3 or 5, wherein a minute vent is provided in a partition between battery cells not sharing the pressure control valve. A first mounting state in which the sealing component mounting portion and the sealing component constitute the electrolyte injection passage by rotating the sealing component mounted on the sealing valve mounting portion, and the electrolytic solution The lead storage battery according to any one of claims 1 to 6, wherein the second mounting state in which the liquid injection passage is sealed with the sealing component is configured to be selectively maintained. At least one of the external ventilation path, the external ventilation path that is opened and closed by the pressure control valve, or the external ventilation path that is provided with the minute ventilation path and is opened and closed by the pressurization control valve is used as the sealing component. The lead storage battery according to claim 1, wherein the lead storage battery is provided in the sealing part without being provided in the mounting portion.

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