Lithium-ion battery pack with low-temperature self-heating function and self-heating method of lithium-ion battery pack

Abstract

A lithium-ion battery pack with a low-temperature self-heating function is characterized by comprising a casing, a thermal insulation layer, an electrical connector, a cell stack, a heater, a heating controller and a switch, wherein the casing is processed and assembled by metal or non-metal materials with higher strength; the thermal insulation layer is a thermal insulation material thermal with higher structural strength of flexibility and is mounted in a gap between the cell stack and the casing; the electrical connector is mounted on a wall plate of the casing and serves as an interface for providing electric energy or signal transmission outwards; the cell stack is mounted in the center of the battery pack and serves as the main body for storing and providing electric energy; the heater is tightly attached to the periphery of the cell stack and ha good thermal conductivity with the cell stack; the heating controller is a temperature relay or a temperature control switch, a heating control part is mounted in the controller in or out of the lithium-ion battery pack, a temperature sensing part is tightly attached to the cell stack or performs temperature sensing through other materials with good thermal conductivity; the switch is mounted in the controller in or out of the lithium-ion battery pack.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and relates to a lithium-ion battery pack with a low-temperature self-heating function and a heating method thereof. Under low temperature conditions, this design method can raise the internal temperature of the lithium-ion battery pack to a suitable temperature range, thereby achieving the purpose of improving the capacity utilization rate and voltage accuracy of the lithium-ion battery pack. Background technique [0002] At present, lithium-ion batteries are widely used in aerospace, missiles, weapons, ships and other fields. These fields have higher requirements for low-temperature environments. Generally, the requirements for low-temperature environments reach -45°C, which affects the low-temperature performance of lithium-ion batteries. challenge. [0003] Judging from the research status at home and abroad, lithium-ion batteries with better performance in low temperature e...

AI Technical Summary

Problems solved by technology

[0009] The main technical problem solved by the present invention is: to overcome the shortcoming of the low-temperature capacity utilization rate of the existing lithium-ion battery, and to provide a lithium-ion battery pack with low-temperature self-heating function and its self-heating method

Images