Lithium ion battery system and fixing device thereof

Abstract

The invention belongs to the technical field of lithium ion batteries, particularly relates to a lithium ion battery system and a fixing device thereof, and provides the following scheme directed at the technical problem that the safety of a lithium ion battery system is not high due to the fact that a battery module cannot be cooled in time when the temperature is too high: the lithium ion battery system comprises a plurality of battery module monomers and a battery shell, a plurality of monomer mounting cavities are formed in the inner side of the battery shell, a heat assisting assembly is arranged between every two adjacent monomer mounting cavities, each heat assisting assembly comprises a fixed partition plate and a pair of heat assisting modules, a memory telescopic body is fixedly connected between each heat assisting module and the corresponding fixed partition plate, and a plurality of heat dissipation holes are formed in each heat assisting module. According to the invention, when the temperature of the battery module monomers is too high, and accordingly the temperature of the heat assisting modules is also too high, the memory telescopic bodies contract to drive the heat assisting modules to be far away from the battery module monomers, so that the heat assisting modules are prevented from continuously heating the battery module monomers, and the heat dissipation holes formed in the heat assisting modules can be used for stably dissipating heat of the battery module monomers, and the high-temperature loss of the battery module monomers is reduced.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a lithium-ion battery system and a fixing device thereof. Background technique [0002] Low temperature is an obstacle to the promotion of electric vehicles in northern my country and alpine regions, and it is also a heart problem for power battery companies. Overcoming the low temperature resistance of power batteries has always been one of the key efforts of the industry. At present, the feasible and effective method for enterprises to solve low-temperature batteries is to preheat the batteries, that is, to use PTC, resistors, heat pipes and phase change materials to preheat systems. However, this method needs to rely on external energy to heat the materials, which is subject to a large Moreover, these preheating methods have low heating efficiency and high energy consumption. Not only that, but in some harsh environments, including acid-base, humid, high temperat...

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Problems solved by technology

[0004] In the actual application process, with the increase of operating time and power consumption of the battery module, when the current in the circuit is too large, the temperature of the battery module will be too high, and the loss of the battery will be increased if the temperature is not cooled in time. Even burned, the above problems lead to low safety of lithium-ion battery system

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