Lithium ion battery pack heat management device based on PTC resistance tape heating

Abstract

The invention relates to a battery heat management device, in particular to a lithium ion battery pack heat management device based on PTC resistance tape heating. According to the technical scheme, aluminum sheets (5) are respectively provided a plurality of grooves and are attached to the sides, with the largest superficial area, of lithium ion batteries (4), PTC resistance tapes (3) are embedded into the aluminum sheets (5) and wound around the surfaces of the lithium ion batteries (4), temperature acquisition units (6) are arranged on the single lithium ion batteries (4) to acquire temperature and report acquired temperature information to a battery slave control unit (8), and a battery main control unit (9) receives the temperature information reported by the battery slave control unit (8) to manage a power distribution unit (2) or issue a control signal of starting a fan (7) to the battery slave control unit (8). According to the lithium ion battery pack heat management device, the heating power can be conveniently adjusted, and the heating and heat dissipation integration level is high.

Description

technical field [0001] The invention relates to a thermal management device for a battery, in particular to a thermal management device for a lithium-ion battery pack. Background technique [0002] With the development of electric vehicles, batteries, as the power source of electric vehicles, have achieved unprecedented development. Among all kinds of power batteries, lithium-ion power batteries have the advantages of high energy density and long cycle life, and are widely used in electric vehicles. [0003] However, the temperature adaptability of existing lithium-ion power batteries cannot meet the requirements of electric vehicles. In a low-temperature environment, the internal resistance of the lithium-ion power battery increases, and the charging and discharging performance of the battery will be greatly reduced, which will affect the performance of the electric vehicle. The internal resistance of the battery will increase and the inconsistency will increase. The capa...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned battery thermal management device adopts forced air cooling for heat dissipation and electric heating for heating, but there are problems such as difficulty in heating and power supply of the battery pack, complex heating power adjustment circuit, low heat transfer efficiency, and poor integration of heating and heat dissipation, especially for high-voltage battery packs. There are potential electrical safety hazards in heating and power supply

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