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Energy storage power station battery thermal runaway protection system

A technology of energy storage power station and protection system, applied in the field of battery thermal runaway protection system of energy storage power station, can solve the problems of low cooling efficiency and single battery temperature, and achieve safe and effective temperature control, good chemical stability, and high cooling capacity. Effect

Inactive Publication Date: 2020-12-25
国网陕西省电力公司汉中供电公司 +3
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Problems solved by technology

[0005] In view of the low efficiency of battery temperature cooling and various technical problems existing in the current single heat dissipation technology, the purpose of the present invention is to provide a thermal runaway protection system composed of solid-solid phase change materials and liquid cold plates. The combination with the liquid cold plate realizes the efficient heat dissipation of the faulty thermal runaway battery and avoids the occurrence of chain fire accidents caused by the propagation of thermal runaway of the battery

Method used

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  • Energy storage power station battery thermal runaway protection system
  • Energy storage power station battery thermal runaway protection system

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Embodiment

[0032] In order to compare the effect of solid-solid phase change materials and liquid-cooled plate battery components on thermal runaway propagation behavior, experiments were conducted using the controlled variable method. The materials used in the test include: battery module (6 batteries in series), battery thermal runaway trigger heater, paraffin / expanded graphite solid-solid composite phase change material cooling plate, cooling water circulator, cold liquid plate, and heat-conducting silicone layer. Table 1 lists the variable combinations for the five sets of experiments. The five experiment numbers are: 1#, 2#, 3#, 4#, 5#. The ambient temperature during the experiment was 25° C. and the atmospheric pressure was 101 KPa. The block heater consists of six circular heating tubes with a diameter of 18mm and a square iron block, the same size as the battery, with a maximum power of 780 watts. The thermal runaway of the battery is triggered by using the power supply to driv...

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Abstract

The invention discloses an energy storage power station battery thermal runaway protection system which comprises solid-solid composite phase change material heat dissipation plates tightly attached to the two sides of battery modules. The battery modules are formed by connecting a plurality of single batteries in series, and the batteries are attached to the solid-solid composite phase change material heat dissipation plates through heat conduction and insulating double-faced adhesive tapes. Cold liquid plates are arranged between the adjacent battery module bodies, and the cold liquid platesare arranged between the battery modules in an S shape. Heat conduction silica gel layers are arranged between the solid-solid composite phase change material heat dissipation plates and the cold liquid plates, and the solid-solid composite phase change material heat dissipation plates are made of a paraffin / expanded graphite solid-solid composite phase change material. Al2O3 / H2O nano sol coolingliquid is adopted as cooling liquid in the cold liquid plates. Through combination of the solid-solid phase change material and the liquid cooling plates, efficient heat dissipation of a faulted thermal runaway battery is realized, and chain fire accidents caused by thermal runaway propagation of the battery are avoided.

Description

technical field [0001] The invention relates to a thermal runaway protection technology for an energy storage power station, in particular to a battery thermal runaway protection system for an energy storage power station. Background technique [0002] Energy storage is one of the important means to solve the intermittent fluctuations of new energy wind power and photovoltaics and realize the function of peak shaving and flat valley. Due to its high energy density and high energy conversion efficiency, lithium-ion batteries are currently the most widely used batteries in electrochemical energy storage projects. More and more lithium-ion battery energy storage power stations are becoming important components of power grid transmission, transformation and distribution. part. However, for large-scale lithium-ion battery energy storage systems, the frequent occurrence of battery fire and explosion accidents is an obstacle hindering its large-scale and commercial application. ,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/627H01M10/653H01M10/6555H01M10/6557H01M10/6567H01M10/659A62C3/16
CPCH01M10/613H01M10/627H01M10/653H01M10/6555H01M10/6557H01M10/6567H01M10/659A62C3/16H01M2220/10Y02E60/10
Inventor 李程廖强强豆河伟田涛于广亮郑楠李义仓王友平鲍磊林嵩博林学兵李小军马长明蒋浩穆菲陈晓丽陈丰
Owner 国网陕西省电力公司汉中供电公司
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