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Battery heat management system realized by using heat pump technology

A technology of battery thermal management and heat pump technology, applied in the field of battery thermal management systems, can solve the problems of increasing the risk of liquid leakage, product cost, and a large amount of space in the liquid cooling system, and achieve low noise, good temperature consistency, and small temperature difference Effect

Inactive Publication Date: 2017-02-01
臻昊(北京)新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantages of this solution are high cooling efficiency and small temperature difference, but the liquid cooling system requires a lot of space, increasing the risk of liquid leakage and product cost

Method used

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  • Battery heat management system realized by using heat pump technology
  • Battery heat management system realized by using heat pump technology

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Embodiment Construction

[0018] Through the following examples, combined with the attached Figure 1-2 , the technical solution of the present invention will be further specifically described.

[0019] figure 1 For the cooling principle of the battery system, when the management system monitors that the temperature of the battery is higher than the set threshold, it controls the K1, K2, K3, and K4 valves of the multi-way valve to switch to the cooling cycle mode. After the coolant passes through the battery heat exchanger, it absorbs the heat of the battery. After absorbing the heat, the coolant is vaporized into a low-pressure gas. After the low-pressure gas passes through the compressor, it becomes a high-pressure gas. After passing through the radiator, the high-pressure gas releases heat and is transformed into a high-pressure liquid again. , After the high-pressure liquid passes through the expansion valve, the expansion valve throttles, lowers the pressure, and lowers the temperature of the hig...

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Abstract

The invention relates to the technical field of electric automobile power batteries, and provides a battery heat management system realized by using a heat pump technology. The battery heat management system comprises a heat exchanger in contact with a battery core surface, and a compressor, a radiator, a radiating fan, an expansion valve, a controller, a closed-loop pipeline and a multi-channel valve, wherein the controller is used for judging whether a battery needs cooling or heating; the multi-channel valve is arranged on the closed-loop pipeline, and the valve is controlled by the controller; the heat exchanger is in physical contact with the battery core surface and a cooling pipeline; throttling and pressure reduction are realized through the expansion valve, and meanwhile the temperature of liquid is reduced; the radiator and the radiating fan are used for radiating gas of pipelines and converting the gas into low-pressure liquid together. According to the principle of phase change heat dissipation, the battery is cooled and heated efficiently through the conversion between the liquid and the gas so as to realize the transfer of heat, so that the temperature of the battery is effectively controlled in an ideal temperature range, quick cooling and quick cooling of the battery are realized, and the temperature uniformity of the battery is guaranteed.

Description

technical field [0001] The invention relates to the technical field of electric vehicle power batteries, in particular to a battery thermal management system for electric vehicles. Background technique [0002] With the large-scale commercial operation of electric vehicles, the influence of ambient temperature on the charging and discharging performance and driving range of electric vehicles has become increasingly prominent. In a high or low temperature environment, the charging and discharging performance and discharge capacity of the power battery are limited, which reduces the vehicle's power and driving range, and increases the charging time of the vehicle. For example, the comparison between the ambient temperature of minus 10 degrees and the ambient temperature of 25 degrees , the driving range of the vehicle is shortened by 20%, and the fast charging time of the vehicle is greatly increased. [0003] In order to reduce the impact of electric vehicles on the ambient ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/615H01M10/617H01M10/625H01M10/6569B60L11/18
CPCB60L58/24H01M10/613H01M10/615H01M10/617H01M10/625H01M10/6569Y02E60/10Y02T10/70
Inventor 李亚辉刘杏华
Owner 臻昊(北京)新能源科技有限公司
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