A lithium battery filler

Abstract

The invention relates to a lithium battery filling agent. The lithium battery filing agent is used for filling a gap of a lithium battery pack and comprises the following components in percentage by mass: 25%-90% of paraffin, 5%-70% of a flame retardant and 3%-20% of a cooling agent. The lithium battery can be efficiently cooled, the technology is simple, and no peripheral cooling device is needed; as the flame retardant is added, heat produced in a using process of the battery pack can be absorbed, and when the temperature of a battery is too high and is close to or higher than a combustion value of paraffin, a flame retardant effect can be realized and potential safety hazards, such as outbreak of a fire and explosion, of the lithium battery can be eliminated; cooling is carried out from interior of the battery pack by adding the cooling agent, the cooling capacity of the lithium battery is further improved, the working temperature of the lithium battery is reduced, the temperature of the battery pack is uniform, the temperature difference among batteries in the battery pack is eliminated, and accidents that the batteries are soft and bulged as local temperature is too high owning to nonuniform cooling of the battery pack can be effectively prevented.

Description

technical field [0001] The invention relates to a functional material filled in the gaps of battery packs, in particular to a lithium battery filler. Background technique [0002] Lithium battery with power (power lithium-ion battery or lithium-ion battery pack) is the most critical component of electric vehicles, which can be called the heart of electric vehicles and is the focus of electric vehicle research. [0003] The high power and fast charging and discharging of power lithium batteries are the general trend of the development of electric vehicles. For a battery pack, the higher the charge-discharge rate, the faster its temperature rises, and the temperature has a double impact on the battery: the higher the temperature, the smaller the internal resistance of the battery, and the higher the corresponding battery efficiency; at the same time, High temperature accelerates various chemical reactions in the system, especially the rate of harmful reactions that may cause ...

AI Technical Summary

Problems solved by technology

Furthermore, when the temperature is uneven, some battery pole pieces under high temperature conditions are also easily damaged, which can easily lead to battery overcharging, seriously affecting the performance of the battery (pack) and its service life, showing that the amount of electricity that can be charged is getting less and less , the heat generation is also more serious. When the heat cannot be effectively transmitted or dissipated, it will easily lead to the decrease of the electrochemical performance of the battery pack and the occurrence of a single battery lagging behind. ACCIDENT