JP6245050B2 - Lead acid battery - Google Patents

Description

  The present invention mainly relates to a lead storage battery for starting an engine.

  A lead-acid battery for starting an engine is a container with a lid provided with a liquid port corresponding to the cell chamber after each of a plurality of electrode plates composed of a positive electrode plate, a negative electrode plate and a separator is stored in the cell chamber. , And after pouring dilute sulfuric acid as an electrolytic solution from the liquid port, the liquid port is sealed with a liquid port plug provided with an exhaust hole for discharging the gas generated in each cell chamber. Since the liquid port plug has an exhaust hole, such a lead-acid battery is not completely sealed, and the electrolyte tends to decrease due to evaporation or the like. Therefore, as shown in Patent Documents 1 and 2, a sheet in which an adhesive layer is provided under the resin layer except for a part (hereinafter referred to as a non-joined portion), the non-joined portion is provided with an exhaust hole via the adhesive layer. By joining on the lid so as to be placed directly above, the gas generated in the cell chamber from one end of the non-joined portion can be efficiently released to the outside, while reducing the electrolyte can be prevented. It is disclosed.

JP 2010-267507 A JP 2008-034168 A

  However, due to the characteristics of the configuration of the car, water droplets such as rain water may be easily applied directly on the lead storage battery after being mounted on the vehicle. Then, even if the periphery of the exhaust hole is covered with a sheet as in Patent Documents 1 and 2, water droplets enter each cell chamber and the amount of electrolyte increases, and the diluted electrolyte overflows from the cell chamber. A bug sometimes occurred.

  The present invention was made in view of such problems, and even if it is placed in a place where water droplets such as rainwater are likely to be splashed, it prevents the intrusion of water droplets, thereby preventing an increase or decrease in electrolytic solution, a high quality liquid type The purpose is to supply lead acid batteries.

  A lead storage battery according to the present invention includes an electrode plate group including a positive electrode plate, a negative electrode plate, and a separator, a battery case having a plurality of cell chambers for storing the electrode plate groups, and a liquid port corresponding to each cell chamber. A lid that seals the opening of the battery case, a liquid plug that seals the liquid port with an exhaust hole for releasing the gas generated in each cell chamber, and under the resin layer except for the non-joined part An adhesive layer is provided on the lid so that the non-joined portion is placed on the cover so that the non-joined portion is disposed immediately above all the exhaust holes. The sheet is provided with a gas discharge path to be discharged, and a water-repellent layer containing at least a water-repellent material is provided at a location corresponding to the non-joined portion on the upper surface of the sheet, and at least a part of the other locations. A water-repellent layer is not provided.

  In a preferred embodiment, a notch is provided in a part of the non-joint portion in the vicinity of the exhaust hole in the sheet, and in another preferred embodiment, the plurality of exhaust holes communicate with each other via a gas exhaust path. doing.

  In another preferred embodiment, the character writing area at the location where the water repellent layer is not provided is larger than the character writing area at the location where the water repellent layer is provided.

  According to the present invention, even if it is placed in a place where water droplets such as rainwater are likely to be splashed, it prevents the water droplets from entering the inside, so that an increase or decrease in the electrolyte can be prevented and a high-quality liquid lead-acid battery can be supplied. It becomes possible.

Overview of the lead-acid battery of the present invention schematically The schematic diagram which showed an example of the principal part in the lead acid battery of this invention The schematic diagram which showed an example of the principal part in the lead acid battery of this invention The schematic diagram which showed an example of the principal part in the lead acid battery of this invention

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view schematically showing a lead storage battery 1 of the present invention, and FIG. 2 is a schematic view showing the main part thereof.

  A positive electrode plate 2 and a negative electrode plate 3 filled with an active material corresponding to each polarity are laminated on a positive electrode lattice and a negative electrode lattice made of Pb or a Pb alloy (for example, Pb—Ca alloy) via a separator 4. It becomes a plate group 6.

  The plurality of electrode plate groups 6 are accommodated in the respective cell chambers 7b of the battery case 7 partitioned into the cell chambers 7b by the partition walls 7a. The current collecting positive electrode ear 2a provided on the positive electrode plate 2 is connected to the positive electrode strap 5a, and the current collecting negative electrode ear 3a provided on the negative electrode plate 3 is connected to the negative electrode strap 5b. One of the positive strap 5a and the negative strap 5b arranged in the cell chamber 7b at both ends is connected to the pole column and then becomes the terminal 5c, and the other is internally connected with different polarities.

  The opening of the battery case 7 is sealed with a lid 8, and after pouring dilute sulfuric acid as an electrolytic solution from the liquid port 9, the liquid port 9 is sealed with a liquid port plug 10. The liquid spout 10 is provided with an exhaust hole 11 for releasing the gas generated inside each cell chamber 7b.

  The sheet 12 covering the exhaust hole 11 provided in the liquid stopper 10 is composed of a resin layer and an adhesive layer, and an adhesive layer is provided under the resin layer except for a non-joined portion. Then, the non-joining portion is arranged directly above all the exhaust holes 11 through the adhesive layer, and the sheet 12 is joined on the lid 8 at a portion other than the non-joining portion provided with the adhesive layer indicated by A. Thus, the gap between the non-joined portion and the lid 8 becomes a gas discharge path 13 that can discharge the gas generated inside the cell chamber 7b from the end portion 12a to the outside. Here, the resin layer of the sheet 12 is made of an acid-resistant resin such as polyethylene or polypropylene, and the adhesive layer is made of an adhesive such as an acrylic emulsion.

  A feature of this embodiment is that a water repellent layer containing at least a water repellent material is provided at a location corresponding to the non-joined portion on the upper surface of the sheet 12, and at least a part (location indicated by B) of the other locations. Does not provide a water repellent layer.

  As described above, due to the characteristics of the configuration of the vehicle, water droplets such as rainwater may be easily applied directly on the lead storage battery 1 after being mounted. Then, water droplets that have entered from the end portion 12a, which is the gap between the sheet 12 and the lid 8, pass through the gas discharge passage 13 and the exhaust hole 11 and are guided to the inside of the cell chamber 7b, and the amount of the electrolyte increases in a thinned form. . As a result, the electrolyte solution diluted from each cell chamber 7b overflows through the exhaust hole 11 and corrodes the vehicle-mounted components around the lead storage battery 1.

  Here, if a water repellent layer containing a water repellent material is provided on the upper portion of the sheet 12, it is considered that water droplets are uniformly removed from the lead-acid battery 1. Further, it has been found that the above-mentioned problems are not solved even if a water repellent layer is provided on the upper surface of the sheet 12. The inventors provide a water-repellent layer containing at least a water-repellent material at a location corresponding to the non-bonded portion on the upper surface of the sheet 12, and at least a part of the other locations (location indicated by B). It has been found that the above-mentioned problems can be solved if the water repellent layer is not provided.

  Specifically, in the case where the water repellent layer is provided on the entire sheet 12 by allowing water droplets to collect at a location where the water repellent layer indicated by B is not provided and separating the location from the gas discharge path 13. It was found that water droplets are less likely to enter the gas discharge path 13 than when the water droplet collection point is not intentionally provided, and the problem that the electrolyte solution increases and overflows inside the cell chamber 7b can be suppressed. . The present embodiment utilizes this knowledge.

  In FIG. 2, a notch 14 is provided in a part of the non-joining portion (gas exhaust path 13) near the exhaust hole 11. When the internal pressure of the corresponding cell chamber 7b becomes abnormally high and a large amount of gas generated from the exhaust hole 11 is released, the notch 14 is deformed upward as a discharge path other than the end 12a, and the gas It has an action of promoting smooth discharge and is closed during normal times, so that it does not induce evaporation of the electrolyte. However, if water droplets are present on the notches 14, there is a risk that they will be deformed downward due to their weight, or drawn into the gas discharge passage 13 when the internal pressure of the battery becomes abnormally low. That is, it can be said that this configuration having the advantage of facilitating smooth gas release and the disadvantage of easily mixing water droplets is a form in which the effect of the present invention is more easily exhibited.

  FIG. 3 shows various forms of the gas discharge passages 13 other than FIG. Although the effect of the present invention can be exhibited for any of these, when a gas discharge path is provided for each individual exhaust hole as shown in FIG. 3A, a “location where no water repellent layer is provided (B ) ”Is relatively small, and the number of end portions 12a that serve as water droplet entrances is increased, which is not preferable. Therefore, in order to fully exhibit the effects of the present invention, it is preferable that the plurality of exhaust holes 11 communicate with each other via the gas exhaust passage 13 as shown in FIG. 2 and FIG.

  FIG. 4 shows a form in which characters that call attention to the user or the operator are printed on the sheet 12. The characters printed on the portion where the water repellent layer is not provided appear to be distorted to the user or the operator due to the refraction of light when a water droplet gets on. For example, if the user (operator) inspects the lead storage battery 1 and its peripheral devices during refueling in the rain, the user (operator) will notice this distortion of characters. If the user (worker) clearly recognizes the distortion of this character, wiping off the water droplets will eliminate the possibility of water droplets entering the gas discharge passage 13, and the vehicle-mounted structure itself is susceptible to water droplets. By encouraging car manufacturers to improve the structure, the probability of occurrence of the above-described defects can be greatly reduced. In order to expect such an effect, the character notation area (X in FIG. 4) at the location where the water repellent layer is not provided is greater than the character notation area (Y in FIG. 4) at the location where the water repellent layer is provided. It is preferable to make it large so that it can be appealed visually.

  As mentioned above, although this invention was demonstrated by suitable embodiment, such description is not a limitation matter and of course various modifications are possible.

  The present invention is particularly useful in a liquid lead-acid battery for starting an engine.

DESCRIPTION OF SYMBOLS 1 Lead acid battery 2 Positive electrode plate 2a Positive electrode ear 3 Negative electrode plate 3a Negative electrode ear 4 Separator 5a Positive electrode strap 5b Negative electrode strap 6 Electrode plate group 7 Battery case 7a Partition wall 7b Cell chamber 8 Lid 9 Liquid port 10 Liquid port plug 11 Exhaust hole 12 Sheet 12a End 13 Gas exhaust passage 14 Notch

Claims (4)

An electrode plate group consisting of a positive electrode plate, a negative electrode plate and a separator;
A battery case having a plurality of cell chambers for storing electrode groups;
A lid that seals the opening of the battery case with a liquid port corresponding to each cell chamber;
A liquid port plug that seals the liquid port with an exhaust hole for discharging gas generated in each cell chamber;
An adhesive layer is provided under the resin layer except for the non-joined portion, and the non-joined portion is joined to the non-joined portion via the adhesive layer so that the non-joined portion is disposed immediately above all the exhaust holes. A sheet provided with a gas discharge path for releasing the gas generated in the cell chamber from the end to the outside;
Consists of
A lead-acid battery in which a water-repellent layer containing at least a water-repellent material is provided at a location corresponding to the non-joined portion on the upper surface of the sheet, and a water-repellent layer is not provided at least at some other locations. The lead acid battery according to claim 1, wherein a notch is provided in a part of the non-joining portion in the vicinity of the exhaust hole in the sheet. The lead storage battery according to claim 1, wherein the plurality of exhaust holes communicate with each other through the gas discharge path. The lead storage battery according to claim 1, wherein a notation area of characters in a place where the water repellent layer is not provided is larger than a notation area of characters in a place where the water repellent layer is provided.

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