JP2007207624A - Lead storage battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control progression of deterioration of a lead storage battery used in a harsh condition. <P>SOLUTION: A group of electrodes 3 are placed in a plurality of cell chambers 2 divided by partitions 1. On the top of the group of electrodes 3, a water tank 4 having a water filling pipe 41 and a water refilling opening 42 is prepared to store water for supplying to the cell chamber 2. An aperture 41a is formed an end of the water filling pipe 41 so that it responds to the liquid level in each cell chamber 2 and refills water automatically to the cell chamber 2 when the liquid level falls. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lead storage battery having a simple water replenishment function.

  Lead storage batteries, especially lead storage batteries for automobiles housed in the hood of automobiles, have become smaller in installation space due to expansion of functions such as engine output improvement, exhaust gas countermeasures, and anti-theft. The installation environment is becoming harsh. In addition, since such a lead storage battery is used in a state close to constant voltage charging, in the environment described above, the charge overvoltage is reduced and the charging current is likely to increase. Electrolysis is accelerated and moisture in the electrolyte is easily lost. Furthermore, in such an environment, moisture is lost even by evaporation.

  When the water in the electrolyte is lost, the sulfuric acid concentration increases, so that the lead dioxide particles in the positive electrode active material are refined to reduce the bonding force and shorten the battery life. In addition, since the electrolyte level is lowered, the strap is exposed, the ear is corroded at the boundary between the strap and the electrode plate ear, and it becomes difficult to discharge by a large current such as starting the engine.

  Therefore, regular water replenishment, especially in the summer when the installation environment is the harshest, frequent replenishment is indispensable, but in the situation where users themselves do not perform regular water replenishment, Replenishing water was a cumbersome task.

Proposals such as Patent Documents 1 and 2 have been made to reduce such water replenishment work.
Japanese Utility Model Publication No. 56-122267 JP, 10-188949, A In the above-mentioned patent documents 1, the auxiliary tank which can be sealed for storing battery replenisher is provided in the upper part of the battery main part which has a plurality of cell chambers, and a battery is put on the bottom of this auxiliary tank. A communication pipe that communicates with each cell chamber of the main body is protruded, the lower end of the communication pipe reaches the appropriate level of the battery liquid in each cell chamber, the liquid level of the battery liquid falls from the lower end of the communication pipe, and it enters the communication pipe A battery liquid replenishing device is disclosed in which a float valve that opens when air flows in is provided in a communication pipe. Further, in Patent Document 2 described above, the sheet of a water container having a protrusion plugged with a sheet at the opening is immersed in an electrolytic solution, assuming that the sheet contains a substance that is decomposed by concentrated sulfuric acid. An automatic water replenishing device is disclosed in which water is added to an electrolytic solution in a container when the liquid level is lowered and the sheet is destroyed.

  The above-mentioned Patent Document 1 has a problem that the space occupied by the battery increases because the auxiliary tank protrudes above the battery. Moreover, since the material of the above-mentioned patent document 2 must make the material of a sheet into a special material, there existed a problem that it was not preferable at the point of cost.

  The present invention has been made in view of the above problems. That is, the present invention is a lead storage battery in which a group of electrode plates is housed in a plurality of cell chambers partitioned by a partition wall, and a water tank storing water for supplying the cell chamber is disposed above the electrode plate group. The water tank is provided with a water injection pipe and a water replenishment port, the water injection pipe is provided so that an opening formed at one end thereof corresponds to the liquid level of each cell chamber, and The lead-acid storage battery is provided with a thread-like body inserted into the water injection pipe, and one end of the thread-like body is opened at one end. The other end is attached to the lower surface of the liquid port plug, and the other end is attached to the stopper for extending the opening and closing the opening.

  In the present invention, as described above, a water tank that stores water to be supplied to the cell chamber is disposed above the electrode plate group, and the water tank is not made of a special material. Therefore, there is no problem that the water tank protrudes to increase the occupied space or increase the cost.

  Hereinafter, the present invention will be described based on the embodiments.

  FIG. 1 is a cutaway cross-sectional view of a main part of a lead storage battery according to an embodiment of the present invention.

  As shown in FIG. 1, the lead storage battery according to the present invention includes six cell chambers 2 partitioned by a partition wall 1. Each cell chamber 2 stores an electrode plate group 3. The water to be supplied to the cell chamber 2 in which the electrode plate group 3 is stored is stored, and a water tank 4 provided with a water injection pipe 41 and a water replenishing port 42 is disposed. The material of the water tank 4 is preferably a polyethylene or polypropylene material with excellent acid resistance.

  The water tank 4 is provided with a water injection pipe 41 and a water replenishing port 42, and the water injection pipe 41 is provided so that an opening 41 a formed at one end corresponds to the liquid level of each cell chamber 2. As a method of providing the water tank 4 in this way, the electrode plate group 3 may be accommodated in the cell chamber 2 and then placed on the positive or negative strap, but the opening 41a of the water injection pipe 41 may be provided. A protrusion is formed on the inner wall of the battery case at a position where each cell chamber 2 is at a predetermined liquid level (for example, an intermediate position between the highest liquid level and the lowest liquid level). Also good.

  The water replenishing port 42 is provided at a position to be closed together with the liquid injection port 6 of the lead storage battery by a liquid port plug 5 that closes the cell chamber 2. In order to achieve such a configuration, the liquid spout 5 has a lower threaded portion 51 for closing the water replenishing port 42 of the water tank 4 and an upper threaded portion 52 for closing the liquid injection port 6 as shown in the figure. Preferably, the space between the lower screwing portion 51 and the upper screwing portion 52 is like a bellows structure so as to be flexible according to the interval between the water tank 4 and the liquid injection port 6. It should be kept elastic.

  Further, as shown in the drawing, an acid-resistant thread-like body 5a is attached to the lower end of the liquid spout 5 and an acid-resistant sphere 5b is attached to the tip thereof. 6, the water replenishing port 42 and the water injection pipe 41 are inserted, and when the liquid spout 5 is opened, the sphere 5b at the tip is pulled by the filament 5a to close the opening 41a. In addition, as the filament 5a, like the water tank 4, an acid-resistant one, particularly a polypropylene-based one excellent in strength, may be used. The sphere 5b is also acid-resistant like the filament 5a. Polypropylene type that is excellent in strength is also preferable.

  Next, the operation of the lead storage battery having such a configuration will be described.

  When the lead storage battery is used under the harsh environment as described above, the water in the electrolytic solution is lost, the liquid level is lowered, and a gap is formed between the liquid level and the opening 41a. If such a gap is formed, the opening 41a is opened by the sphere 5b when the liquid spout 5 is closed in a normal use state, so that the water from the water tank 4 is opened by the gap described above. Is added to the electrolytic solution through the opening 41a, and the liquid level can be returned to an appropriate level.

  Once the water from the water tank 4 is added to the electrolyte, the water tank 4 is almost empty. In the thing of the above-mentioned patent document 2, although the rubber container corresponding to the water tank 4 is provided, when water runs out in this rubber container, it cannot replenish, whereas the thing of the present invention is When the liquid spout 5 is opened, the sphere 5b is pulled by the filament 5a and closes the opening 41a, so that the water tank 4 can be replenished with water through the liquid injection port 6 and the water replenishment port 42. Moreover, when water is replenished, it is conceivable that the water will overflow from the water replenishing port 42. However, even if the water overflows, it is only added to the electrolyte solution, so that there is no problem due to this. In addition, when it is not preferable that water overflows from the water replenishing port 42, it is preferable to use a dropper or the like.

  According to the present invention, the lead rechargeable battery whose liquid level is lowered by being used in a severe environment is provided with an automatic water replenishment function having a simple configuration. However, the progress of deterioration can be suppressed, and its industrial applicability is great.

1 is a partially cutaway cross-sectional view of a lead storage battery according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Partition 2 Cell chamber 3 Electrode plate group 4 Water tank 41 Water injection pipe 41a Opening part 42 Water replenishment port 5 Liquid port stopper 51 Lower screwing part 52 Upper screwing part 5a Filamentous body 5b Sphere 6 Injection hole

Claims (2)

A lead acid battery in which a group of electrode plates is stored in a plurality of cell chambers partitioned by a partition wall, and a water tank storing water for supplying to the cell chamber is disposed above the electrode plate group. Are provided with a water injection pipe and a water replenishment opening, the water injection pipe is provided with an opening formed at one end corresponding to the liquid level of each cell chamber, and the water replenishment opening closes the cell chamber. A lead-acid battery, wherein the lead-acid battery is provided so as to be closed. 2. The lead-acid battery according to claim 1, wherein a thread-like body is inserted into the water injection pipe, and the thread-like body is attached to a plug for extending one end from the opening and closing the opening, and the other end is attached. A lead-acid battery, characterized in that it is attached to the lower surface of the liquid spigot.

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