Subcooled phase change material-based passive battery thermal regulator, method and management system

A phase-change material and passive technology, applied in the field of battery thermal regulators and passive battery thermal regulators, can solve the problems of non-use, inability to absorb heat at high temperature, etc., and achieve the effect of maintaining charge and discharge performance

Active Publication Date: 2021-07-09
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF14 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the scheme adopted, the difference of the "supercooled" phase transition point may not be used, and the temperature of the heat released and the heat absorbed are the same, and the effect of absorbing heat at a high temperature and releasing heat at a low temperature cannot be passively realized based on the physical properties of the material, or the volume near the freezing point and melting point is not used. Significantly changing characteristics work in conjunction with thermal switches

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Subcooled phase change material-based passive battery thermal regulator, method and management system
  • Subcooled phase change material-based passive battery thermal regulator, method and management system
  • Subcooled phase change material-based passive battery thermal regulator, method and management system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Such as figure 1 As shown, the embodiment of the present application provides a passive thermal regulator device, which can control the temperature of the battery pack within a reasonable temperature working range by storing and releasing the heat generated by the battery pack 30, It includes the shell 10 , the supercooled phase change module 50 , the auxiliary heat exchange device 20 and the thermal switch device 40 .

[0077] Figure 2A It shows that when the fin 4013 is fixed on the piston body 4010, figure 1 Side view cross-sectional structure of the device shown. image 3 shown as figure 1 , Figure 2ATop sectional view of the device shown. The battery pack is provided with a battery pack case 10 formed of a rigid casing made of copper or other metal with good thermal conductivity in order to enclose the Li-ion battery pack and ensure mechanical support for the pack and its thermal conductivity, while enhancing communication with the battery. The natural conv...

Embodiment 2

[0089] This embodiment provides a passive heat regulator device, the structure of which is basically the same as that of Embodiment 1, the difference lies in: Figure 8 As shown, the finned piston 401 in the thermal switch device 40 is changed to a non-finned piston 4011 structure. The design of the fins can increase the heat exchange area and enhance the heat exchange effect, but it will reduce the space of the supercooled phase change module 50 . Changing the piston 4011 without fins can increase the storage space of the supercooled phase change module to store more supercooled phase change modules, which can store more heat, increase the energy storage capacity, and prolong the heating time of the battery.

Embodiment 3

[0091] This embodiment provides a passive heat regulator device, the structure of which is basically the same as that of Embodiment 2, except that: Figure 9As shown, the supercooled phase change module 50 is changed to a combination of multilayer phase change energy storage materials 501 . The multi-layer phase change energy storage material 501 may include: a phase change material with supercooling, such as a layer of sodium thiosulfate pentahydrate, a layer of sodium acetate trihydrate, a layer of lithium nitrate trihydrate, etc., which contribute to different solidification-melting batteries The realization of the working temperature control range; phase change materials with large volume changes, such as unsaturated fatty acid (lauric acid) layer, etc., contribute to large volume changes during the phase change process; phase change materials with large latent heat, such as Aliphatic hydrocarbons, polypolyols, polyenols and other organic solid-liquid phase change material...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thermal conductivityaaaaaaaaaa
latent heataaaaaaaaaa
melting pointaaaaaaaaaa
Login to view more

Abstract

A subcooled phase change material-based passive battery thermal regulator comprises a phase change module and a thermal switch device. The phase change module is made of the phase change material with a certain supercooling degree, and passive battery temperature management and control can be achieved by combining the characteristics of volume change, freezing point and melting point inconsistency in the heat charging and discharging process of the phase change material; the phase change material with the supercooling degree has the effects that power is provided for the closing and opening process of the thermal switch device based on the volume change, the phase change material melts and absorbs heat generated by the battery at a high temperature to maintain the temperature of the battery not to rise continuously through different melting points and freezing points, and the phase change material is solidified at a low temperature to release heat to the battery to increase the temperature of the battery; and therefore, the working temperature of the battery is further controlled on the basis of the thermal switch device. The supercooling phenomenon is utilized, heat is absorbed near a high-temperature melting point, heat is released near a low-temperature freezing point, the thermal switch is pushed to be switched on and off in combination with remarkable change of the volume during melting and solidification, and the effect of dual passive control over the upper limit and the lower limit of the battery temperature is achieved.

Description

technical field [0001] The invention discloses a battery heat regulator, in particular relates to a passive battery heat regulator based on supercooled phase change materials, and belongs to the field of thermal management of power batteries and energy storage batteries. Background technique [0002] Most of the internal combustion engines of automobiles use gasoline and diesel as fuel, and the exhaust gas generated by the combustion is directly discharged into the atmosphere, which will cause environmental pollution. Therefore, my country is gradually promoting electric vehicles to replace fuel vehicles. However, the temperature of the power battery pack of electric vehicles has always restricted the promotion and use of electric vehicles. Whether it is traditional lead-acid batteries or current nickel-hydrogen and lithium-ion batteries, temperature has a very significant impact on battery performance. Too high or too low is not conducive to the performance of the battery. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/615H01M10/625H01M10/659
CPCH01M10/613H01M10/615H01M10/625H01M10/659Y02E60/10
Inventor 巨星王泽旭许瑶李冰辰李凯璇徐超
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap