Cylindrical lithium battery

Abstract

The invention discloses a cylindrical lithium battery. The cylindrical lithium battery comprises a battery cell, a cylindrical inner housing, a housing, a positive terminal and a negative terminal, wherein the battery cover is packaged in the inner housing; the housing covers the inner housing; the positive terminal and the negative terminal are positioned on middle positions of upper and lower end surfaces of the housing respectively, and a cover plate is arranged on the upper end surface of the housing; a glue injection opening A is formed in the cover plate; a glue injection opening B is formed in a position, corresponding to the glue injection opening A, in the lower end surface of the housing; high heat-conduction electronic silica gel is filled between the inner housing and the housing. According to the cylindrical lithium battery disclosed by the invention, the high heat-conduction electronic silica gel can enable the cylindrical lithium ion battery to conduct heat produced by the battery cell into the environment more quickly and uniformly, the sealing performance and the vibration resistance of the housing are effectively improved; the high heat-conduction electronic silica gel belongs to room-temperature curing organic silicon rubber, has excellent electrical performance, ageing resistance, cold and hot alternating resistance, moisture resistance, non-swelling performance, vibration resistance and water resistance, so that the safety coefficient of the lithium battery in the using process can be increased.

Description

technical field [0001] The invention relates to a battery, in particular to a cylindrical lithium battery with fast heat dissipation and good stability. Background technique [0002] Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. The earliest lithium battery came from the great inventor Edison, using the following reaction: Li+MnO 2 =LiMnO 2 The reaction is a redox reaction, discharge. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have become the mainstream now. [0003] Lithium batteries were first used in pacemakers. The self-discharge rate of lithium batteries is extremely low, and the discharge voltage is gentle. It enabl...

AI Technical Summary

Problems solved by technology

[0007] 3. The quality and performance of the electrolyte itself;

[0008] 4. When injecting liquid, the amount of liquid injected cannot meet the process requirements;

[0009] 5. In the assembly process, the sealing performance of laser welding is poor, and there is air leakage, and the leakage is missed when measuring the air leakage;

[0010] 6. Dust, pole piece dust is easy to cause micro-short circuit at first;

[0011] 7. The positive and negative plates are thicker than the process range, and it is difficult to enter the shell;

[0012] 8. Liquid injection sealing problem, steel ball sealing performance is not good, resulting in air bulge;

[0013] 9. The incoming material of the shell has a thicker shell wall, and the deformation of the shell affects the thickness;

[0014] 10. Excessive ambient temperature outside is also the main cause of the explosion

[0015] In the prior art cylindrical lithium battery, there is a certain gap between the battery cell and the casing due to technical process factors. The gap is usually low vacuum or there is a certain amount of gas, so the heat generated by the battery cell cannot be effectively and uniformly conducted. To the battery case and then dissipate into the external environment, it is easy to overheat when the battery is working, resulting in thermal runaway of the battery, deformation of the battery, or even explosion, causing casualties; the sealing and shock resistance of the battery case are not ideal, and it is easy to damage the battery , causing security issues

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