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Power battery pack thermal management system based on immersed boiling heat transfer

A technology for power battery packs and thermal management systems, applied to secondary batteries, circuits, electrical components, etc., can solve the problems of increasing space requirements, weight and cost

Pending Publication Date: 2021-05-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest challenge of passive phase change material thermal management technology (PCM-BTMS) is to improve its thermal conductivity, and also consider the issue of latent heat recovery
Additionally, the integration of PCM systems necessarily increases space requirements, weight and cost

Method used

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  • Power battery pack thermal management system based on immersed boiling heat transfer
  • Power battery pack thermal management system based on immersed boiling heat transfer
  • Power battery pack thermal management system based on immersed boiling heat transfer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention will be further explained below in conjunction with the accompanying drawings.

[0020] Such as figure 1 , image 3 As shown, a power battery pack thermal management system based on submerged boiling heat transfer includes a power battery 9 arranged inside an aluminum barrel 10, and a heat insulation pad 8 made of airgel is arranged between each piece of power battery 9 . Foam 7 is arranged between the power battery 9 and the aluminum barrel 10 , and the power battery 9 together with the aluminum barrel 10 is immersed in the low-boiling-point working medium 5 in the steel sealed tank 1 . The bottom of the sealing groove 1 is provided with a PTC heating film 6, and a vacuum pump 3 is used to vacuumize the sealing groove 1. Among them, the low-boiling-point working medium has a gas point less than 40°C, preferably an electronic fluorinated liquid, specifically hydrofluoroether, liquid ammonia, liquid propane, and the like. When thermal runaway occ...

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PUM

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Abstract

The invention discloses a power battery pack thermal management system based on immersed boiling heat transfer. A power battery pack is immersed in a working medium with a low boiling point, and when the power battery pack generates a large amount of heat, the working medium is heated to boil and vaporize so as to efficiently dissipate heat of the battery. Heat insulation pads are arranged among power batteries, heat transfer can be blocked when a certain power battery is in thermal runaway, thermal runaway of multiple batteries is prevented, the safety of the electric automobile is improved, the foam is arranged on the contact surfaces of the batteries and an aluminum barrel, and the safety problem caused by bulging and extrusion of the batteries in the working process is avoided. The optimal temperature range of the batteries is 25-40 DEG C, the batteries can always work in the optimal temperature range, namely, the temperature of the power batteries can be regulated and controlled in real time under different working conditions.

Description

technical field [0001] The invention belongs to the technical field of thermal management of power batteries, and in particular relates to a thermal management system and a method thereof for direct immersion boiling heat transfer of a liquid medium. Background technique [0002] With the continuous innovation and development of power battery technology, especially the sharp drop in the cost of lithium-ion batteries, the development of the global electric vehicle industry has accelerated significantly. [0003] The power increase of electric vehicles requires large-capacity batteries and high-current discharge. During the working process of batteries, a large amount of heat such as electrochemical reaction heat, current Joule heat, and polarization heat will be generated, resulting in an increase in the temperature of the battery body. Battery heating is the main safety issue of lithium-ion batteries. Excessively high, too low or uneven temperature will affect the discharge ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/615H01M10/617H01M10/625H01M10/637H01M10/6569H01M10/6571H01M10/658
CPCH01M10/613H01M10/615H01M10/617H01M10/625H01M10/637H01M10/6569H01M10/658H01M10/6571Y02E60/10
Inventor 连文磊任雪萍
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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