Lithium battery and fire extinguishing device for lithium battery
A fire extinguishing device and battery technology, which is applied in secondary batteries, battery pack components, circuits, etc., can solve problems such as low fire extinguishing efficiency, failure to cover batteries, and thermal runaway of batteries, so as to avoid large-scale fires and explosions, The effect of suppressing the development of thermal runaway and avoiding potential safety hazards
Pending Publication Date: 2020-05-22
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology
[0004] Aiming at the problem that batteries are prone to thermal runaway, on the one hand, many institutions have done flame retardant research on battery materials such as electrolytes, but the existing lithium-ion battery early warning and fire extinguishing devices are not only bulky, but most of them cannot cover all batteries. core, when thermal runaway occurs in the battery, the internal gas will continue to be generated, and the internal pressure of the battery will be high, resulting in the fire extinguishing agent being unable to enter the high temperature point inside the battery, resulting in low fire extinguishing efficiency and poor suppression effect
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[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0025] Please refer to Figure 1 to Figure 5 , figure 1 It is a schematic diagram of a fire extinguishing device for a lithium-based battery provided in the first embodiment of the present invention; figure 2 It is a schematic diagram of a fire extinguishing device for a lithium-based battery provided by the second embodiment of the present invention; image 3 A schematic diagram of the lithium-based battery provided by the present invention; Figure 4 for image 3 internal diagram of Figure 5 for Figure 4 top view.
[0026] The invention provides a fire extinguishing device for a lithium-based battery, which includes a heat-sensitive case and a fire-extinguishing medium. The fire-extinguishing medium is packaged inside the...
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The invention provides a fire extinguishing device for a lithium battery. The fire extinguishing device comprises a thermosensitive shell and a fire extinguishing medium packaged in the thermosensitive shell. According to the fire extinguishing device for the lithium battery, provided by the invention, when the battery is subjected to thermal runaway, the thermosensitive shell can be broken and release the fire extinguishing medium to directly act on a high-temperature point in the battery, so that the inhibition effect of the fire extinguishing medium is exerted to the maximum extent. Compared with a traditional fire extinguishing device, the fire extinguishing device for the lithium battery has the advantages of being light in weight, sensitive in reaction, efficient and accurate in effect, safe to use, environmentally friendly, free of pollution and the like, and large-scale application and popularization are easy to achieve. The invention further provides a lithium battery comprising the fire extinguishing device, and the lithium battery has the technical advantages.
Description
technical field [0001] The invention relates to the technical field of lithium-based power battery fire-fighting and fire extinguishing, and more specifically, relates to a fire-extinguishing device for lithium-based batteries. The present invention also relates to a lithium-based battery comprising the above-mentioned fire extinguishing device. Background technique [0002] In recent years, with the gradual advancement of energy transformation, high specific energy batteries have become more and more widely used in fields such as electric vehicles and smart grids. Lithium-ion batteries have become a leader in the field of new energy due to their long cycle life and high energy density. [0003] Although the performance of lithium-ion batteries is excellent, when they are in a state of abuse, internal heat accumulation will trigger reactions such as the decomposition of the solid-liquid surface film (SEI) of the battery, which in turn will generate more heat accumulation, t...
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IPC IPC(8): H01M2/02H01M10/0525A62C3/16A62C35/10
CPCA62C3/16A62C35/10H01M10/0525H01M50/124Y02E60/10
Inventor 王青松刘昱君段强领李煌孙金华
Owner UNIV OF SCI & TECH OF CHINA