Positive plate for high-intensity grid of lead acid storage battery
A lead-acid battery, positive plate technology, applied in the direction of electrode carrier/current collector, etc., can solve the problems of reducing the service life of lead-acid battery, loss of supporting active material, failure of lead-acid battery, etc., to enhance structural strength and dimensional stability. , The effect of improving creep resistance and improving service life
Inactive Publication Date: 2014-08-27
SUZHOU UNIV
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Problems solved by technology
At present, the common positive electrode grid materials in production include lead-antimony alloy, low-antimony or ultra-low-antimony alloy, lead-calcium, etc. The positive electrode grid formed by these materials will be corroded into PbO during the charging process of the battery. 2 , while PbO 2 The molecular volume of PbO is about 1.4 times the volume of lead, plus PbO 2 The film has certain pores, so the volume of the corrosion product is much larger than that of the lead alloy, so that the positive grid is under stress, and then gradually creeps and grows linearly, and finally loses the role of supporting the active material, making the positive electrode grid The above-mentioned active substances soften and fall off, resulting in the failure of the lead-acid battery and reducing the service life of the lead-acid battery
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[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0020] As mentioned in the background section, since the positive grid is easily corroded into PbO during the charging process of the lead-acid battery 2 , resulting in creep and linear growth, causing the active material to soften and fall off, eventually leading to the failure of the lead-acid battery and reducing its service life.
[0021] The inventor has done in-depth research on this, and found that the lead-acid batteries used in electric bicycles are u...
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Abstract
The embodiment of the invention discloses a positive plate for a high-intensity grid of a lead acid storage battery. The positive plate includes a positive grid and active substance coated on the surface of the positive grid, wherein the positive grid is made of carbon fiber reinforced lead-based composite material. In the positive plate for the high-intensity grid of the lead acid storage battery provided by the invention, as the positive grid is made of carbon fiber reinforced lead-based composite material with higher specific strength and higher specific modulus and components of the carbon fiber do not take part in the electrochemical reaction of the battery during the charge-discharge process of the battery, the positive grid has high intensity, high carrying capacity and stronger creep deformation resistance, so that the binding force between the active substance as well as between the active substance and small grids of the positive grid are remarkably enhanced, as a result, the possibilities of softening and shedding of the active substance are low, and the service life of the lead acid storage battery can be further prolonged.
Description
technical field [0001] The invention relates to the technical field of accumulators, and more specifically relates to a high-strength grid positive plate of a lead-acid accumulator. Background technique [0002] Today, when oil and other energy sources are increasingly tense and air pollution is becoming more and more serious, electric bicycles, which are light, fast, pollution-free, and low-cost vehicles, have become more and more popular. The equipment that provides electric energy to the electric bicycle is the storage battery, that is, the storage battery is the energy source of the electric bicycle. At present, most of the accumulators used in electric bicycles are lead-acid accumulators (accounting for more than 95% of the market share). [0003] However, compared with battery systems such as nickel-metal hydride batteries or lithium batteries, the lead-acid battery has the disadvantage of short service life. According to a number of studies, the main reason for the ...
Claims
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IPC IPC(8): H01M4/68
CPCY02E60/10
Inventor 柳颖高建峰周建国张娟
Owner SUZHOU UNIV