Mean-temperature method of cylindrical battery

Abstract

The invention discloses a mean-temperature method of a cylindrical battery. The mean-temperature method of the cylindrical battery has the technical scheme that 1, the arrangement mode is determined according to the battery pack forming requirements, and a casing module is designed; 2, a cylindrical battery cell is assembled in the casing module, and sealant is coated for sealing; 3, liquid phase change material composite glue is prepared; 4, the phase change material composite glue is poured into the casing module, and a battery pack with good temperature consistency is obtained after curing and forming. The phase change material composite glue is prepared by phase change materials and organic silicon filling and sealing glue according to a certain ratio, wherein the phase change materials use paraffin and graphite as major components; the organic silicon filling and sealing glue uses vinyl silicone oil and modified aluminum oxide powder as major components. Through the structure features of the mean-temperature method, the mean-temperature method has the beneficial effects that the battery core has good temperature consistency; the module structure is good in intensity and can pass by the battery pack-relevant vibration, falling and collision tests. The phase change material composite glue is encapsulated in the casing; no loss occurs after the long-time cyclic use; the permanent service life is realized.

Description

technical field [0001] The present invention relates to a temperature equalization method for a cylindrical battery, especially a module that uses phase change heat storage technology and heat conduction potting material technology to absorb and conduct heat generated by the battery during operation, and belongs to the technical field of battery heat management . Background technique [0002] With the rapid development of electric vehicles, smart devices and electric energy storage products, in the application of power batteries, the 18650 cylindrical battery has relatively mature technology, low production cost, high utilization rate of battery packs, and stable performance. It has been widely used by manufacturers. When the power battery is working, due to the large power consumption of the load, the battery pack is prone to generate a lot of heat when it is discharged at a high power in an instant. The difference in consistency is an important factor affecting the worki...

AI Technical Summary

Problems solved by technology

Traditional cooling methods such as fan cooling are still the main cooling method because of its low cost and unsatisfactory effects. Liquid cooling is rarely used by manufacturers because of its high cost and the risk of liquid leakage.

As people put forward higher requirements for safety and reliability of battery packs, traditional cooling solutions cannot fully meet them, and the difficulty of thermal management design of battery packs is gradually increasing according to specific applications.

Furthermore, when the battery pack of the device proposes that each battery cell has a good temperature consistency (±2°C) on the basis of meeting requirements such as waterproof, impact resistance, compression resistance, vibration resistance, and flame retardancy, it is currently not yet no good solution

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