Heat absorption and heat insulation structure of the battery module
A battery module and heat absorbing agent technology, which is applied in the direction of secondary batteries, battery pack components, circuits, etc., can solve the problems of thermal runaway diffusion of batteries, and achieve the effects of ensuring safety, avoiding thermal runaway diffusion, and reducing heat conduction
Active Publication Date: 2021-03-05
BEIJING KEY POWER TECH
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Problems solved by technology
[0005] The invention provides a heat-absorbing and heat-insulating structure of a battery module to solve the problem in the prior art that adjacent battery cells in a battery module are prone to thermal runaway diffusion
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[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0041] refer to figure 1 The heat-absorbing and heat-insulating structure of a battery module shown in the present invention includes a battery module with a plurality of battery cells 1 and a sealed bag 2, and the sealed bag 2 is provided with a colloid 3 and a heat-absorbing agent that can g...
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Abstract
The invention provides a heat-absorbing and heat-insulating structure of a battery module, which includes: a package having a first cavity inside the package; a heat-absorbing agent arranged in the first cavity, and the heat-absorbing agent can absorb heat and generate gas. Applying the technical scheme of the present invention, after the heat-absorbing and heat-insulating structure is arranged between two adjacent electric cells, if a thermal runaway occurs in one electric cell, the heat generated by the electric cell can be conducted to the heat-absorbing agent in the package , The endothermic agent vaporizes after absorbing heat, and the gas generated can bring a large amount of heat to the outside of the battery module, thereby preventing the damaged cell from transferring a large amount of heat to the adjacent cell and causing further damage. Therefore, the technical solution of the present invention can reduce heat conduction between adjacent battery cells, avoid thermal runaway spread, and thus ensure the safety of the battery module.
Description
technical field [0001] The invention relates to the field of electric vehicle battery systems, in particular to a heat absorption and heat insulation structure of a battery module. Background technique [0002] With the rapid development of new energy vehicles, the safety of new energy vehicle battery systems has also received more and more attention. The current electric vehicle battery system is composed of many cells connected in series and in parallel. A layer of insulating film or buffer foam is usually arranged between adjacent cells to play the role of insulation or buffering. However, if a cell experiences thermal runaway, If the surface temperature is too high, it will quickly pass through the insulating film or buffer cotton and transfer heat to adjacent monomers, causing chain thermal runaway expansion, causing safety accidents such as combustion or even explosion. [0003] In order to prevent the spread of thermal runaway and to prevent the heat generated by the...
Claims
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IPC IPC(8): H01M10/613H01M10/625H01M10/658H01M10/6569
CPCH01M10/613H01M10/625H01M10/6569H01M10/658H01M10/653Y02E60/10H01M50/204H01M50/242H01M10/6551H01M10/6552
Inventor 李立国华剑锋田硕
Owner BEIJING KEY POWER TECH