A self-protection device for a new energy battery and its application method

Abstract

The invention discloses a self-protection device for a new energy battery and a method for using the same, belonging to the field of new energy batteries. A self-protection device for a new energy battery can firstly disperse the heat at the welding point evenly on the bottom of the battery pack, And through the U-shaped heating network to disperse the heat to the surface of the shell, compared with the existing technology, the heat accumulation at the welding point is significantly reduced, and the battery pack is effectively protected from local overheating, thereby reducing safety hazards and prolonging its service life. At the same time, under the action of double protection points, on the one hand, the inner buffer ball can play a buffering role, reducing the probability of battery pack damage in case of accidental impact; , and then significantly accelerate the speed of heat dissipated from the outer shell, and at the same time cooperate with the function of the moisture-absorbing heat-consuming block, which can not only consume heat but also absorb moisture, effectively maintaining a dry and safe environment when the battery pack is in use.

Description

technical field [0001] The invention relates to the field of new energy batteries, and more specifically, to a self-protection device for new energy batteries and a method for using the same. Background technique [0002] In the current new energy industry, especially in the field of power batteries, lithium-ion batteries have gained a great advantage due to their high energy density, long cycle life, and no memory effect in charging and discharging, and have become the new energy vehicle powertrain. the only solution. Among them, round batteries and square batteries have always been two different directions. Especially for passenger cars represented by Tesla, they are more inclined to use cylindrical batteries. In the early stage, standard 18650 batteries were mainly used. At the same time, 21700 batteries are also developing rapidly as an emerging round battery generation. The energy density of the developed battery module and battery pack system is about 300Wh / kg, which...

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Problems solved by technology

[0005] In view of the problems existing in the prior art, the object of the present invention is to provide a self-protection device for a new energy battery and its application method, which can firstly disperse the heat at the welding point evenly at the bottom of the battery pack, and pass the U-shaped The heat distribution network disperses the heat to the surface of the shell, which significantly reduces the heat accumulation at the welding point compared with the existing technology, effectively protecting the battery pack from local overheating, thereby reducing potential safety hazards and prolonging its service life. Under the action of the point, on the one hand, the internal buffer ball can play a buffering role, reducing the probability of battery pack damage in case of accidental impact; The speed at which heat is dissipated from the shell, combined with the function of the moisture-absorbing heat-consuming block, can not only consume heat, but also absorb moisture, effectively maintaining a dry and safe environment when the battery pack is in use

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