Mobile phone lithium ion battery suitable for low-temperature environment

Abstract

The invention discloses a mobile phone lithium ion battery suitable for a low-temperature environment. The lithium ion battery comprises a lithium ion battery body, an annular cavity is formed in theside wall of the lithium ion battery body, and a friction ring is slidably connected to the inner wall of the annular cavity. A heat preservation plate is embedded in the inner wall of the annular cavity, a strip-shaped groove is formed on the side wall of the lithium ion battery body, and a driving device for driving the friction ring to move up and down is installed in the strip-shaped groove. According to the invention, a capacitor and a spiral coil are connected in series to form an LC series circuit through a temperature control sheet in a low-temperature state, and an oscillation currentof which the size and direction are periodically changed is generated in the LC series circuit, so that the spiral coil internally provided with an iron core generates a magnetic field with constantly changing magnetic force and direction, the magnetic friction ring can be pushed to slide up and down in the annular cavity, and heat is generated through constant friction, and accordingly the temperature of the environment where the lithium ion battery is located is increased, and the damage to the battery or a mobile phone due to discharging of the lithium ion battery in the low-temperature environment is avoided.

Description

technical field [0001] The invention relates to the technical field of machinery, in particular to a mobile phone lithium ion battery suitable for low-temperature environments. Background technique [0002] The working principle of lithium-ion batteries is that the internal electrolyte changes through chemical reactions, and a potential difference appears between the positive and negative electrodes to generate current. At present, the batteries used in electronic products such as mobile phones are mostly lithium-ion batteries. [0003] Among them, the ambient temperature of the battery is the key factor affecting the performance of the battery. In low-temperature areas such as northern my country, the outdoor temperature in winter can often reach about -30°C. In this low-temperature environment, the electrolyte moves quite slowly, thus Affect the transfer activity of lithium ions between the positive and negative electrodes, resulting in smaller battery discharge current an...

AI Technical Summary

Problems solved by technology

[0003] Among them, the ambient temperature of the battery is the key factor affecting the performance of the battery. In low-temperature areas such as northern my country, the outdoor temperature in winter can often reach about -30°C. In this low-temperature environment, the electrolyte moves quite slowly, thus Affect the transfer activity of lithium ions between the positive and negative electrodes, resulting in smaller battery discharge current and reduced battery capacity, which may lead to rapid power consumption, black screen, crash, touch screen failure, and inability to access the Internet. When entering a warm room, the temperature change may also cause condensation inside the phone, circuit board short circuit or other malfunctions

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