Graphene and heat pump coupled heating and cooling device for power battery pack

A power battery pack and graphene technology, which is applied to battery pack parts, secondary batteries, circuits, etc., can solve the problems of low warm-up efficiency and low energy utilization rate

Pending Publication Date: 2021-11-19
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, this novel design is a device coupled with a heater, a heat pump, and a liquid cooling system to solve the problem of low preheating efficiency when it is cold, low energy utiliza...

Method used

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  • Graphene and heat pump coupled heating and cooling device for power battery pack
  • Graphene and heat pump coupled heating and cooling device for power battery pack
  • Graphene and heat pump coupled heating and cooling device for power battery pack

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Embodiment Construction

[0024] The graphene element of the present invention uses graphene oxide ink as a raw material, and the required shape is printed layer by layer by a 3D printer, and then the graphene is reduced through a Joule heating process.

[0025] The graphene oxide preparation method adopted by the graphene element is as follows: using graphite as a raw material, 1.5 g of graphite is added to 200 ml of sulfuric acid / H3PO4 (volume ratio 9:1) solution by using the improved Hummer method. 9 g of kmno4 was gradually added to the above solution and stirred at 250 rpm for 12 h at 50 °C. The solution was then cooled to room temperature and poured onto 400 ml ice, while 3 ml H2O2 was added to the solution while stirring. The solution was washed with 30 ml of 37% hydrochloric acid, and then centrifuged with distilled water at a speed of 8000 rpm. The upper clear solution was decanted and refilled with distilled water and centrifuged until no precipitation of AgCl was visible in the test solutio...

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Abstract

The invention discloses a graphene and heat pump coupled heating and cooling device for a power battery pack. The device is characterized by being formed by coupling an air heat pump preheating device, an electric heater preheating device and a liquid cooling device; a heat management device is formed by sequentially connecting a battery pack (1), an electromagnetic valve (3), a condenser (4) and a compressor (5). The raw material of an electric heater adopted by the preheating system is graphene, and an auxiliary battery pack provides electricity for the heater. Temperature control probes are distributed in the battery pack, when the temperature is cold, low and high, the heater preheating system, the air heat pump preheating device and the liquid cooling device control the temperature of the power battery respectively, it is guaranteed that the power battery works at the proper temperature, and therefore the service life of the automobile battery pack is prolonged.

Description

technical field [0001] The invention belongs to the field of thermal management of electric vehicle batteries, and in particular relates to effective preheating and thermal safety management technologies of power batteries. Background technique [0002] The power core of electric vehicles is the power battery pack, generally lithium-ion batteries, nickel-cadmium batteries, nickel-metal hydride batteries, etc. Due to the structure and electrolyte of these batteries, the performance of the battery is greatly affected at low temperature, and its capacity, life, discharge capacity, etc. will all decrease significantly with the decrease of temperature, which will affect the power and cruising range of the vehicle. will have very adverse effects. In addition, the intercalation and lithium plating reactions of lithium ions on the graphite electrodes of batteries exist simultaneously and compete with each other during low-temperature charging. The diffusion of lithium ions in grap...

Claims

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Application Information

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IPC IPC(8): H01M50/209H01M10/613H01M10/615H01M10/625H01M10/6551H01M10/6554H01M10/6556H01M10/6568H01M10/6569H01M50/242H01M50/244H01M50/249H01M50/258H01M50/264H01M50/289H01M10/6571
CPCH01M50/209H01M50/244H01M50/249H01M50/258H01M50/264H01M50/289H01M50/242H01M10/6571H01M10/613H01M10/625H01M10/615H01M10/6554H01M10/6556H01M10/6568H01M10/6569H01M10/6551Y02E60/10
Inventor 张天时韩志武王智炜陈昊鹏莫子鸣
Owner JILIN UNIV
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