A lithium-ion battery module thermal balance management system

Abstract

The invention discloses a heat balance management system for a lithium-ion battery module. The heat balance management system comprises heat-conducting structure parts, a deformation heat-conducting pad, a heating film, a cooling fin, a balance and temperature control circuit board and a battery management system circuit board, wherein the heat-conducting structure parts are tightly connected with lithium-ion soft package single cells; the deformation heat-conducting pad is arranged on the periphery of a lithium-ion soft package single cell queue; the heating film is arranged on one of two relatively wide surfaces of the rectangular battery module; the cooling fin is arranged on the other one of the two relatively wide surfaces of the rectangular battery module and is tightly connected with the deformation heat-conducting pad; the balance and temperature control circuit board is connected with the battery management system circuit board and each lithium-ion soft package single cell; and the battery management system circuit board is arranged at the end of the battery module and is connected with a safety protection circuit, a balance circuit, the lithium-ion soft package single cells, temperature sensors and a current sensor separately. By the heat balance management system, application of the battery module at any environment temperature can be achieved.

Description

technical field [0001] The invention relates to the technical field of thermal balance management of lithium-ion battery modules, in particular to a thermal balance management system of lithium-ion battery modules. Background technique [0002] In recent years, environmental pollution and energy depletion have attracted increasing attention. With the continuous progress of new high-energy secondary battery technology, especially lithium-ion power battery technology, the development and development of electric vehicle technology represented by electric bicycles and electric vehicles Promotional applications are gaining more and more attention. [0003] The battery systems required by electric vehicle manufacturers tend to be integrated, miniaturized, and lightweight, that is, to arrange as many batteries as possible in a limited space. Compared with lead-acid and nickel-metal hydride batteries, lithium-ion new high-energy secondary batteries have the characteristics of high ...

AI Technical Summary

Problems solved by technology

Lithium-ion batteries will generate heat due to the existence of ohmic internal resistance during charging and discharging at room temperature. If the heat generated by the battery cannot be released in time, there will be thermal runaway, resulting in safety accidents such as battery burning or bulging; When used at high temperature, it is more likely to cause heat accumulation; therefore, when used in normal and high temperature environments, a heat dissipation system is required

When the lithium-ion battery is used in a low temperature environment, its capacity will not be fully released and there is a risk of damaging the battery; therefore, when used in a low temperature environment, a heating system is required

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