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Lead storage battery

A lead-acid battery and battery technology, applied in secondary battery manufacturing, battery pack components, circuits, etc., can solve the problems of lead-acid battery prices rising and productivity decline, and achieve the effect of reducing the number of parts and reducing costs

Inactive Publication Date: 2008-03-26
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, it is necessary to strictly control the thickness deviation of the electrode plate or the diaphragm, or the deformation of the battery cell due to the pack pressure, which further leads to a decrease in productivity compared with the liquid lead-acid battery, and is the main cause of the price increase of the lead-acid battery.

Method used

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Experimental program
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Effect test

no. 1 Embodiment approach

[0066] First, the first embodiment will be described. FIG. 1 is a diagram showing a cross section of a main part of a liquid lead-acid storage battery according to a first embodiment.

[0067] In the lead acid storage battery 10 of the first embodiment, the liquid port plug 13 provided with the vent hole 12 for discharging the gas inside the battery to the outside of the battery is attached to the liquid port 11 provided in the battery case. In addition, in the example shown in FIG. 1, the example in which the liquid port 11 is provided in the cover 14 which is a battery case is shown.

[0068] The positive electrode plate 16, the negative electrode plate 17, and the separator 18 accommodated in the electric tank 15 of the lead acid battery 10 are configured such that the entire surface of the electrode plate surface of the positive electrode plate 16 and the electrode plate surface of the negative electrode plate 17 are immersed in Electrolyte 19. In this lead-acid battery ...

no. 2 Embodiment approach

[0088] FIG. 4 is a diagram showing a cross section of a main part of a lead acid battery 50 according to the second embodiment. In addition, the same reference numerals are assigned to the same structures as those in the above-mentioned embodiment, and only differences will be mainly described in detail. In the lead acid battery 50 of the second embodiment, the air-permeable porous filter 51 is arranged on the passage between the vent hole 12 and the control valve part 21 in the main body cylinder 20 of the liquid port plug 13 .

[0089] The porous filter 51 can prevent foreign matter such as dust and sand particles from falling from the outside of the battery to the control valve unit 21, and can stabilize the valve opening operation of the control valve. In addition, when the flame or electric spark generated outside the battery ignites the oxygen and hydrogen existing around the exhaust hole 22, the combustion flame may reach the control valve part 21 and damage the control...

no. 3 Embodiment approach

[0094] FIG. 5 is a diagram showing a cross section of a lead storage battery 70 according to the third embodiment. In addition, the same reference numerals are assigned to the same structures as those in the above-mentioned embodiment, and only differences will be mainly described in detail. In the lead storage battery 70 of the third embodiment, the anti-foaming plate 71 facing the exhaust hole 22 is arranged in the main body cylinder 20 , which is characterized in that.

[0095] In the lead-acid storage battery 70 of the third embodiment, unlike the valve-controlled lead-acid storage battery in which there is almost no electrolytic solution released from the electrode plate group, since there is an electrolytic solution that immerses the entire surface of the electrode plate, vibrations applied to the battery may The liquid surface is shaken to make the electrolytic solution adhere to the control valve unit 21 . In such a case, the valve opening operation of the control val...

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Abstract

A liquid-inlet cap (13) is installed in a liquid inlet (11) provided in a battery casing, the liquid-inlet cap (13) having a ventilating hole (12) for expelling a gas from the inside of a battery to the outside of the battery. A control valve section (21) is installed inside a cylindrical body (20) of the liquid-inlet cap (13) separately from the cylindrical body (20) and responds to the internal pressure of the battery to form a ventilating passage from a vent hole (22) provided on one end to a ventilating opening (28) provided on the other end.

Description

technical field [0001] The present invention relates to a lead-acid battery, and more particularly to a lead-acid battery having a valve structure in a liquid-inlet cap, and a lead-acid battery capable of exhibiting excellent life characteristics without replenishing water even when the liquid-inlet cap is reduced. Background technique [0002] Lead storage batteries are used in various applications including starting applications for automobiles. Especially for lead-acid batteries used for starting automobiles, the positive and negative plates have been immersed in the electrolyte (dilute sulfuric acid), and the liquid port is equipped with a liquid port plug connecting the inside and outside of the battery. (exhaust plug) of the so-called "liquid lead-acid battery". In addition to this, a negative electrode absorption type control valve type lead acid battery is also used in which oxygen generated in the battery is absorbed in the negative electrode plate exposed from the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/36H01M2/12H01M2/28H01M4/68H01M10/04H01M50/541
CPCY02E60/12Y02E60/126Y02E60/10Y02P70/50
Inventor 安斋诚二石牧圭安田博古屋定男
Owner PANASONIC CORP
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