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Emergency refrigerating device for battery energy storage system

A battery energy storage system and refrigeration device technology, applied in battery circuit devices, circuit devices, secondary batteries, etc., can solve problems such as thermal runaway of battery packs, achieve convenient low-pressure storage of liquid nitrogen, and improve system reliability and safety. , Solve the effect of inconvenient supply

Inactive Publication Date: 2016-03-30
周哲明
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AI Technical Summary

Problems solved by technology

[0003] To solve the safety problem of the current battery energy storage system, it is mainly to solve the thermal runaway problem of the battery pack, including the thermal runaway caused by the heat accumulation of the densely packed batteries, and the thermal runaway chain reaction caused by the local combustion and explosion of the battery pack

Method used

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  • Emergency refrigerating device for battery energy storage system

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Such as figure 1 Shown: An emergency refrigeration device for a battery energy storage system, using liquid nitrogen phase change refrigeration, including a nitrogen generator 1, a liquid nitrogen tank 2, a cooling pipe 3, a cooling valve 4, a cooling channel 5 and a pressure relief valve 6.

[0018] The nitrogen generator 1 is connected with the liquid nitrogen tank 2, and nitrogen is produced when the battery is charged, and the cooling capacity is stored. The liquid nitrogen tank 2 is connected with the cooling pipe 3, and the cooling pipe 3 is a Dewar tube, that is, a vacuum insulation interlayer pipe. The pressure control device 2-1 on the liquid nitrogen tank 2 controls the liquid nitrogen within a reasonable pressure range. A cooling valve 4 is installed on the cooling pipe 3, the cooling valve 4 includes a controller 4-1, a plurality of ...

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Abstract

The invention relates to the field of battery energy storage system security, in particular to the field of power battery security. An emergency refrigerating device for a battery energy storage system adopts liquid nitrogen phase-change refrigeration, and comprises a nitrogen generator, a liquid nitrogen container, a cooling pipe, a cooling valve, refrigerating passages and a pressure release valve. The nitrogen generator is used for nitrogen generation and cooling storage during battery charging. A rechargeable micro battery supplies power for the cooling valve, and the controller is provided with an independent signal collecting and logic processing mechanism without depending on a battery management system (BMS); and the controller comprises a vibration sensor which can sense the accidents such as collision and explosion. A closed refrigerating passage is generally mounted on a heat-dissipation module of the battery, and the heat of the battery is dissipated through the heat-dissipation module. An open refrigerating passage is mounted on the battery, and a plurality of small holes formed in the part, close to the battery, of the pipeline are used for uniformly spraying liquid nitrogen onto the battery. The emergency refrigerating device has the beneficial effects that the liquid nitrogen is used for emergency refrigeration, and can reach the effect of quick cooling, so that thermal runaway of a battery pack is prevented, and a thermal runaway chain reaction is avoided to the maximum extent.

Description

technical field [0001] The invention relates to the field of battery energy storage system safety, in particular to the field of power battery safety. Background technique [0002] With the rapid development of the global new energy revolution, countries around the world are competing to develop industries such as photovoltaics, wind power, and electric vehicles. One of the core technologies is energy storage systems, especially battery energy storage systems. However, under the existing battery technical conditions, the battery will generate a lot of heat during charging and discharging, and may burn and explode under the conditions of overcharging, overheating and short circuit. As a battery pack of an energy storage system, the batteries are densely packed together, and heat is easy to accumulate during use, and it is easy to cause a chain reaction when the battery burns and explodes. The battery energy storage system is an energy-intensive object, and when it burns and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/637H01M10/6569H01M10/42
CPCH01M10/4257H01M2010/4271Y02E60/10
Inventor 周哲明
Owner 周哲明
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