Cooling-fin cylindrical battery pack heat dissipation device and method employing composite phase changing material

A technology of composite phase change materials and heat dissipation fins, which is applied to battery pack parts, secondary batteries, circuits, etc., can solve the problems of increasing the temperature difference of the battery pack, detrimental to the overall performance of the battery pack, and increasing the battery pack, etc., to achieve improved Temperature uniformity, improved heat dissipation and stability, and reduced design costs

Inactive Publication Date: 2018-01-23
BEIHANG UNIV
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  • Abstract
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Problems solved by technology

[0005] Today, lithium battery packs generally use liquid cooling for heat dissipation and heat preservation. Although it is convenient for electronic control, the additional pipelines, hydraulic pumps and other devices increase the weight of the battery pack, which poses

Method used

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  • Cooling-fin cylindrical battery pack heat dissipation device and method employing composite phase changing material
  • Cooling-fin cylindrical battery pack heat dissipation device and method employing composite phase changing material
  • Cooling-fin cylindrical battery pack heat dissipation device and method employing composite phase changing material

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0025] The radiating fins adopted in the present invention can be processed by currently quite mature cold-rolling and welding processes, wherein the main fins are shell structures, and the phase-change materials are encapsulated inside, and the phase-change materials are solid at normal temperature, so the encapsulation process is relatively Simple, can be packaged by welding, and various types of fins can be selected for the auxiliary fins, such as pin fins, straight ribs, ring ribs, and sleeve fins.

[0026] The radiating fins using the composite phase change material of the present invention need to cooperate with the cylindrical battery. The height, spacing, and thickness of the ribs can be adjusted according to the actual situation of the battery pack, but the sub-fins need to be in tangential contact with the surface of the battery case. For the ...

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Abstract

The invention discloses a cooling-fin cylindrical battery pack heat dissipation device and method employing a composite phase changing material. A cooling fin comprises a main fin and auxiliary fins,wherein the main fin is of a fully-closed shell structure, a phase changing material is packaged in the main fin, the auxiliary fins are expanded towards two sides from a surface of the main fin, andtail ends of the auxiliary fins are in tangential contact with the surface of a battery. Cylindrical batteries in different specification sizes can be adapted by adjusting the size and the distance ofthe fins and the thickness of the phase changing material, and the heat dissipation and the heat preservation performance requirement is met. A fixed base is arranged at the bottom of a battery pack,the battery pack can be reinforced, the shock resistant capability is improved, a fan can be externally connected to improve convection, and the heat dissipation and heat preservation effect is improved. By the heat dissipation device, the advantage of the phase changing material is fully utilized, the temperature uniformity of the battery pack is improved, light requirement is conformed, thermaldisaster is prevented from propagating in a battery stack, the thermal safety of the battery pack is improved, and the heat dissipation device can be widely applied to various fields of automobile and aerospace.

Description

technical field [0001] The invention relates to the field of thermal management of electric vehicle lithium battery packs, in particular to a cylindrical battery pack heat dissipation device and method using heat dissipation fins of composite phase change materials. Background technique [0002] Lithium batteries are widely used in electric vehicles, and always work in the form of battery modules and battery packs to output electric energy. Among them, thermal management is a key part of the battery management system. Effectively enhancing the heat dissipation and heat preservation of the battery pack and reducing the complexity of the thermal management system is an important part of the thermal management technology design of the battery pack. [0003] Cylindrical lithium batteries have high energy density and power density, and good monomer consistency, which is the mainstream of the development trend of lithium batteries today. In the cylindrical lithium battery module,...

Claims

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Application Information

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IPC IPC(8): H01M10/613H01M10/617H01M10/625H01M10/643H01M10/6551H01M10/659H01M2/10H01M50/204
CPCY02E60/10
Inventor 许骏吴依静高翔王璐冰
Owner BEIHANG UNIV
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