System for testing thermal performance of vehicle power battery

A power battery and test system technology, which is applied in the direction of measuring electricity, measuring devices, and material thermal development, can solve problems such as thermal runaway, and achieve the effect of uniform ambient temperature

Inactive Publication Date: 2016-03-02
BEIJING UNIV OF TECH
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Problems solved by technology

At present, the experimental devices for the research on the thermal characteristics of batteries mainly include vacuum tanks, incubators,

Method used

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  • System for testing thermal performance of vehicle power battery

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Embodiment Construction

[0019] The present invention will be further explained below in conjunction with the drawings and specific embodiments:

[0020] This system uses a temperature following method to synchronize the device temperature with the temperature of the battery under test to create an adiabatic environment. During the charging and discharging process, the temperature of the cabinet and the battery are detected at the same time. If the battery temperature rises by 1°C within one minute, we pass the accuracy as The 0.01℃ / min PID control heating and cooling device (6) heats the cabinet in time to increase the temperature by 1℃ within one minute. During charging and discharging, the temperature of the cabinet and the battery are synchronized at the same time. The heat generated cannot be dissipated, and the environment is sealed and insulated in this way. This system mainly includes three parts: First, the thermal characteristics test system of lithium-ion batteries for electric vehicles. The ...

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Abstract

A system for testing thermal performance of a vehicle power battery belongs to the field of electric vehicle batteries. The system includes a high-temperature explosion-proof box; a pressure sensor, a temperature sensor, a heating and cooling device, a battery module and a circulating fan are arranged in the high temperature explosion-proof box; the circulating fan is connected with a circulating motor; the high temperature explosion-proof box is provided with an exhaust hole; the exhaust hole, a ball valve, a sampling port, a cut-off valve and a gas chromatograph are connected in sequence; the ball valve is connected to a gas collecting bag through an air exhaust pipe; the pressure sensor and the temperature sensor are connected to the computer through a data collector; a charge-discharge machine is connected to the battery module through a socket; the high temperature explosion-proof box is provided with an observation window; and the observation window is connected to a camera through an endoscope. The system can perform thermal property test of the battery, battery discharge analysis and thermal runaway test of the battery. The system has the advantages of simple structure and low cost, can carry out test on multiple functions of the lithium ion battery, so as to realize design optimization on the structure of the battery pack; and the system has broad market prospects.

Description

Technical field [0001] The invention provides a thermal performance test system for a vehicle power battery, which belongs to the field of electric vehicle batteries. Background technique [0002] With the development of modern technology and the increasingly prominent energy and environmental issues, the application of electric vehicles has become more and more extensive, and the performance requirements for power batteries have become higher and higher. Lithium-ion batteries have become people’s first choice due to their high voltage, high specific energy, long cycle life, and low environmental pollution. However, fire and explosion accidents caused by thermal runaway of lithium-ion batteries have been reported frequently, and safety issues have become obstacles. One of the main reasons for the mass production and application of lithium-ion batteries. Therefore, many scholars at home and abroad have carried out researches on the thermal characteristics and thermal runaway of l...

Claims

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Application Information

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IPC IPC(8): G01N25/20G01R31/36G01N30/88
CPCG01N25/20G01N30/88G01R31/36
Inventor 纪常伟林深汪硕峰余梦辉王兵徐溥言
Owner BEIJING UNIV OF TECH
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