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Cooling/heating double circulation system for heat management of power battery pack

A technology of power battery pack and circulation system, which is applied to secondary batteries, circuits, electrical components, etc., can solve the problems of high cost and complicated process of battery pack cooling device, and achieves a small footprint, simple structure, and simple system control. Effect

Active Publication Date: 2018-09-18
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of effective heat dissipation during the charging and discharging process of the power battery pack, the starting and charging of the battery pack in low temperature weather, and the complicated process and high cost of the current heat sink

Method used

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  • Cooling/heating double circulation system for heat management of power battery pack
  • Cooling/heating double circulation system for heat management of power battery pack
  • Cooling/heating double circulation system for heat management of power battery pack

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Embodiment Construction

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

[0025] Such as figure 1 As shown, a cold / heat dual cycle system for thermal management of a power battery pack includes a heat exchanger 2 connected to the battery pack 1, and the interface A of the heat exchanger 2 is connected to the condenser 4 through a shut-off valve C3 , there is an accumulator 5 connected to the pipeline under the condenser 4, and an outlet under the accumulator 5 is connected to the interface B of the heat exchanger 2 through a shut-off valve D6 to form a figure 2 The cooling circuit shown by the arrow; the interface B of the heat exchanger 2 is connected to the inlet pipeline of the bubble pump 8 through the check valve 7, and the outlet of the bubble pump 8 is connected to the pipeline of the gas-liquid separator 9 arranged above the liquid reservoir 5 connection, the gas outlet of the gas-liquid separator...

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Abstract

The invention belongs to the field of power battery pack, and in particular, relates to a heat management system for a power battery pack, wherein the heat management system includes a cooling circuitand a heating circuit; the cooling circuit is formed by a heat exchanger, a condenser and a liquid storage device and is connected to the battery pack; the heating circuit is formed by a heat exchanger, a bubble pump and a gas-liquid separator; a liquid outlet of the gas-liquid separator is connected with the liquid storage device by a pipeline. The liquid storage device is connected with the bubble pump by a pipeline to supplement a liquid cooling working medium for the bubble pump. The heat management system comprises the technical effects that high-efficient heat transfer is achieved, a heat exchange coefficient is greatly improved by working medium phase change heat transfer; compared with a traditional wind cooling heat transfer coefficient, the heat exchange coefficient is increasedby two orders of magnitude and is increased by one order of magnitude as compared with liquid cooling; and heat dissipation and cooling double circulation is achieved, heat dissipation circulation omits power components of a traditional liquid cooling system, and heat dissipation and heating are combined into a system, the structure is simpler and the operation is more reliable.

Description

technical field [0001] The invention belongs to the field of power battery packs, in particular to a thermal management system for power battery packs. Background technique [0002] As a new type of environmentally friendly energy, the lithium-ion power battery system is environmentally friendly, low-noise, energy-saving, and has a good prospect for use. As a power source for vehicles, lithium-ion battery packs are currently one of the main directions for the development of electric vehicle power in the world. However, there are still many problems in the use process: ① Due to the large amount of heat generated by the lithium-ion battery pack during operation, the temperature of the battery pack rises, which affects the safety and service life of the battery. Especially in a high temperature environment, the temperature of the battery pack causes the battery pack to attenuate sharply, especially the difference in the consistency of the battery pack caused by the temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/615H01M10/625H01M10/637H01M10/6556H01M10/6568H01M10/6569
CPCH01M10/613H01M10/615H01M10/625H01M10/637H01M10/6556H01M10/6568H01M10/6569Y02E60/10
Inventor 梁坤峰王林高春艳任岘乐万容君李亚超王莫然米国强
Owner HENAN UNIV OF SCI & TECH
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