System and control method for realizing inerting fire prevention and heat management optimization of vehicle-mounted battery pack

A vehicle-mounted battery and thermal management technology, applied in battery/fuel cell control devices, battery/battery traction, secondary batteries, etc., to eliminate fire causes, reduce safety risks, and reduce fire causes

CN113147312APending Publication Date: 2021-07-23西安鹏泰航空动力技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-07-23

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Abstract

The invention discloses a system for realizing inerting fire prevention and heat management optimization of a vehicle-mounted battery pack, and further discloses a control method of a fresh air system for realizing an oxygen-enriched environment of a passenger space of a new energy automobile. When the vehicle-mounted power battery pack is in an abnormal state, a vehicle-mounted inerting comprehensive control unit monitors data changes of pressure and oxygen concentration of a certain part in the vehicle-mounted power battery pack, and then controls a direct-current variable-frequency air compressor and large-flow and small-flow electromagnetic valves to maintain the temperature, the pressure and the oxygen concentration in the battery pack in a normal safe state; and after the gas passes through a gas inlet electromagnetic valve of the vehicle-mounted battery pack, the nitrogen-rich gas is distributed and injected into the vehicle-mounted power battery pack through a nitrogen-rich gas outlet pipeline of the primary cooling or direct cooling and heating management system. The method can realize the current oxygen isolation and fire prevention in the inner space of the power battery pack, and meanwhile, the temperature uniformity control efficiency of current battery pack liquid cooling or direct cooling and heating management in a local micro space is improved and enhanced.
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Description

technical field

[0001] The invention belongs to the technical field of inerting fire prevention and thermal management optimization of power battery packs of new energy vehicles, and specifically relates to a system for realizing inert fire prevention and thermal management optimization of vehicle battery packs. The invention also includes a system for realizing inertization of vehicle battery packs Control methods for fire protection and thermal management optimization systems. Background technique

[0002] The power source of new energy vehicles mainly relies on the coexistence of lithium-ion batteries / battery packs or nickel-metal hydride batteries / battery packs loaded on electric vehicles, as well as other such as lithium iron phosphate blade batteries. Various battery packs have different advantages and disadvantages. , but as a means of transportation, electric vehicles still have many potential risk factors under various harsh operating conditions. At present, they ar...

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Embodiment Construction

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

[0025] The present invention is a system for achieving inert fire prevention and thermal management optimization of vehicle battery packs, the structure of which is as follows figure 1 As shown, the air nitrogen oxygen separation membrane group 103 is included, and the air nitrogen oxygen separation membrane group 103 is communicated with the vehicle interior space 201 through the oxygen-enriched gas outlet pipeline 110, and the air nitrogen oxygen separation membrane group 103 is also connected to the vehicle air conditioner evaporator through the pipeline. 203, the vehicle-mounted air-conditioning evaporator 203 communicates with the liquid-cooled or direct-cooled nitrogen-enriched gas outlet pipeline 107 in the vehicle-mounted power battery pack 202 through pipelines, and the bottom of the vehicle-mounted power battery pack 202 is provided ...