Rechargeable mobile phone battery with low resistance losses

Abstract

The invention belongs to rechargeable batteries for mobile phones, and provides a rechargeable mobile phone battery with low resistance losses. The rechargeable mobile phone battery with low resistance losses has the advantages that foil rod tabs are adopted and arranged on current collectors and along other paths, and two protection plates are mounted, so that the internal resistances of a mobilephone core and the mobile phone battery can be greatly reduced, and a theoretical value of the synchronous resistance pressure in the mobile phone core can be reduced to 1 / 16 of that of the conventional mobile phone, which can effectively reduce heat consumption of the mobile phone battery during charging; calculation results show that under the condition that an anode material, a cathode material and diaphragms in the battery can withstand large currents, the mobile phone battery may be fully charged within 69.8 minutes; and obviously, the charging speed can be improved, battery protection can be achieved, and the service life of the battery can be prolonged.

Description

technical field [0001] The invention belongs to a rechargeable battery used in a mobile phone; Background technique [0002] In order to facilitate the statement, the rechargeable battery used in the mobile phone is referred to as the mobile phone battery, and the battery cell of the mobile phone battery is referred to as the mobile phone battery. The mobile phone battery has two wide flat surfaces and four long and narrow sides. The side of the core In this paper, the long and narrow side formed by the long side of the layered object wound in the cell phone cell is called the end face, and the long and narrow side formed by the bending of the layered object wound in the cell phone cell is called the curved surface. At present, the internal resistance of mobile phone batteries is mainly composed of two parts: the resistance of the protection board (generally less than 60 milliohms) and the resistance of the mobile phone battery (generally less than 60 milliohms). Install th...

AI Technical Summary

Problems solved by technology

[0002] In order to facilitate the statement, the rechargeable battery used in the mobile phone is referred to as the mobile phone battery, and the battery cell of the mobile phone battery is referred to as the mobile phone battery. The mobile phone battery has two wide flat surfaces and four long and narrow sides. The side of the core In this paper, the long and narrow side formed by the long side of the layered object wound in the cell phone cell is called the end face, and the long and narrow side formed by the bending of the layered object wound in the cell phone cell is called the curved surface. At present, the internal resistance of mobile phone batteries is mainly composed of two parts: the resistance of the protection board (generally less than 60 milliohms) and the resistance of the mobile phone battery (generally less than 60 milliohms). Install the protective board, which should realize the following four functions: ① overcharge protection; ② over-discharge protection; ③ over-current protection; On the other hand, although the current mobile phone batteries, whether they are lithium-ion batteries or polymer batteries, either use a laminated structure or a winding structure, the mobile phone battery with a laminated structure has a small internal resistance and good performance, but the process is complicated. The cost is high. The tabs of the positive and negative poles of the mobile phone battery with a winding structure are connected to the corresponding current collectors near the innermost winding layer. This connection is indeed convenient for manufacturing and low cost, but this connection leads to charges in the current collector. The flow process is very different, and the internal resistance is large and the performance is poor. In order to reduce the manufacturing cost of mobile phone batteries and improve performance, this paper mainly makes relevant statements on mobile phone batteries with winding structures. Therefore, for the convenience of stating the current mobile phones with winding structures The electric core is referred to as the current wound mobile phone battery. In the mobile phone battery, the current collector is made of metal foil. For the convenience of expression, the negative electrode current collector is called the negative electrode foil, and the positive electrode current collector is called the positive electrode foil. When charging , a large number of electrons flow into the negative electrode foil from the negative electrode ear. Under the action of the voltage, some electrons will enter the negative electrode material on the negative electrode foil as soon as they flow into the negative electrode foil, and at the same time, there will be a corresponding number of electrons in the positive electrode material adjacent to the negative electrode material. For the positive electrode foil, the flow of the current formed by the electrons flowing through this path in the current collector is only a few centimeters. In addition, after the electrons flow into the negative electrode foil from the negative electrode ear, some of them will flow to the outermost negative electrode foil before entering the negative electrode foil. At the same time, a corresponding number of electrons in the positive electrode material adjacent to the negative electrode material enters the positive electrode foil, and the flow of the current formed by these electrons flowing through this path in the current collector may exceed 100 cm. When charging with high current, this kind of process difference will not only cause significant differences in the potential difference of each point inside the battery, but also cause the charging voltage in some places of the battery to be too high, and in some places the charging voltage is too low, which not only reduces the charging speed, but also causes the charging voltage to be too high. It is easy to accelerate battery aging,

Images