Thermal insulation device for lithium batteries

Abstract

The invention relates to a thermal insulation device for lithium batteries. The thermal insulation device comprises a body and a cover body, wherein the cover body covers one end of the body; the body comprises a heat conduction layer, a water bag layer, a top thermal insulation layer, a bottom thermal insulation layer and a shell, wherein the heat conduction layer is provided with at least one accommodating cavity for accommodating the lithium battery; the water bag layer covers the periphery of the heat conduction layer; the water bag layer is mainly composed of a film bag and pure water filled in the film bag; the top thermal insulation layer and the bottom thermal insulation layer are respectively arranged on two ends of the heat conduction layer; the top thermal insulation layer is provided with channels which are communicated with the accommodating cavities in a one-to-one correspondence manner; the shell is used for accommodating the water bag layer, the heat conduction layer, the top thermal insulation layer and the bottom thermal insulation layer. The thermal insulation device is simple in structure and low in cost; the temperature of the heat conduction layer cannot be continuously reduced along with the temperature of the environment, so that the charging/discharging performance of the lithium batteries are not affected by low-temperature environment; the water bag layer can absorb most heat, thus effectively relieving the impact of the high-temperature environment on the lithium batteries.

Description

technical field [0001] The invention relates to the field of heat preservation, in particular to a heat preservation device for a lithium battery. Background technique [0002] Lithium batteries are made of lithium metal or lithium alloy as the negative electrode material and use non-aqueous electrolyte solution. They are widely used in various current products and equipment that require battery power. They are one of the most practical power supply sources. [0003] In the environment where lithium batteries are used, temperature has the greatest impact on the charging and discharging performance of lithium batteries. The interface between the electrode and the electrolyte is regarded as the heart of the battery. The temperature mainly affects the reaction rate of the electrode and the transmission speed of the electrolyte. Therefore, an appropriate temperature environment is the key to maintaining the charging and discharging performance of the lithium battery. If the tem...

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Problems solved by technology

[0005] Based on this, it is necessary to provide a solution for the poor charge and discharge performance of traditional lithium batteries at ambient temperatures below -20°C and above 60°C, and the low-temperature battery manufacturing process is complex, expensive, and unable to withstand high-temperature shocks. A lithium battery heat preservation device that can effectively improve the charging and discharging performance of lithium batteries in low-temperature or high-temperature environments, is simple to manufacture, and is cheap

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