A method for flame retardant and cooling inside a high specific energy battery pack
A technology for battery packs and flame retardants, applied in battery pack components, isolation of batteries from their environment, circuits, etc., can solve problems such as inability to actively control combustion and explosion, large temperature difference between inside and outside, and impact on battery performance, so as to eliminate fire Hidden hazards, avoided installation, high safety and reliability effects
Active Publication Date: 2019-10-15
江苏海四达电源有限公司 +1
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Problems solved by technology
During the use of existing battery packs for electric vehicles, there is a large temperature difference between the inside and outside, and there is a certain temperature gradient, which will have different effects on the performance of the battery
Although the existing battery packs for electric vehicles are equipped with a battery management system to manage the temperature, for the "thermal runaway" of the battery pack in extreme cases, the power supply is only passively cut off, and the "thermal runaway" caused by "thermal runaway" cannot be actively controlled. "caused combustion and explosion
Method used
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[0013] Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, enumerating specific embodiment is the preferred embodiment of the present invention, can not limit the claims of the present invention, the present invention still has multiple other specific implementation modes, All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
[0014] refer to figure 1 , a method for flame retardant and fire extinguishing inside the battery pack. The method is to microencapsulate the flame retardant and fill it inside the battery pack box. The microcapsule coating of the flammable agent dissolves quickly and releases the flame retardant. By cooling and diluting the inside of the battery pack, the physical way of forming an isolation film and the chemical way of terminating free radicals can eliminate and reduce fire hazards and flame retard...
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The invention relates to the technical field of making secondary battery packs, and provides a method for flame retarding and cooling inside a high specific energy battery pack. In the battery pack, due to a fault such as a short circuit of a battery cell, the temperature changes drastically, causing fire, combustion or even explosion. The function of the present invention is that when the internal temperature of the battery pack rises to a certain value, the microcapsule shell containing the flame retardant dissolves or ruptures rapidly, releasing the flame retardant, and forms an isolation film on the local high temperature area inside the battery pack and its surroundings. The physical way and the chemical way of terminating free radicals consume or dilute oxygen, achieve the function of flame retardancy and cooling, stop the diffusion of high temperature areas, eliminate and reduce fire hazards, and improve the safety performance of battery packs. The invention has the advantages of high safety and reliability, and the microcapsule flame retardant avoids the installation of a large fire extinguishing device, and is more portable and environment-friendly.
Description
technical field [0001] The invention relates to a method for flame retardant cooling and fire extinguishing inside a battery pack, which belongs to the technical field of manufacturing lithium ion secondary battery packs. Background technique [0002] With the development of my country's strategic emerging industries and the decision-making and deployment of energy-saving and emission-reduction work, the government attaches great importance to the cultivation and development of energy-saving and new energy vehicle industries. As a green and environmentally friendly vehicle, electric vehicles will become a future development trend. Compared with traditional lead-acid, nickel-cadmium, and nickel-hydrogen secondary batteries, polymer lithium-ion secondary batteries are environmentally friendly, have high operating voltage, long cycle life, and small self-discharge, and are environmentally friendly. The concept of automotive energy has received great attention and is being incre...
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IPC IPC(8): H01M2/10H01M50/224H01M50/227H01M50/24H01M50/249
CPCH01M50/24Y02E60/10
Inventor 沈涛唐琛明王进茅海忠顾凯凯朱汉林
Owner 江苏海四达电源有限公司