Power lithium battery temperature control device

Abstract

The invention discloses a power lithium battery temperature control device, which comprises a temperature control battery holder, wherein the temperature control battery holder forms a circulation loop with a high and low temperature liquid source through a pipe; the circulation loop is provided with a circulating pump; and a temperature sensor and a control unit are connected between the circulating pump and the temperature control battery holder. In the invention, the temperature sensor detects in real time and the control unit regulates in time, thereby providing a suitable work environment temperature for a lithium battery, improving the electrochemical reaction speed, and ensuring the output current and voltage and discharge capacity of the lithium battery so as to enable the lithiumbattery to achieve the optimal property and meet the utilization requirement of a power source.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, in particular to a power lithium battery temperature control device. Background technique [0002] A lithium battery refers to a secondary battery that uses two compounds that can reversibly intercalate and deintercalate lithium ions as the positive and negative electrodes. The positive electrode material of a lithium battery is usually composed of lithium active compounds. Common positive electrode materials are mainly composed of lithium cobaltate, lithium manganese oxide, ternary nickel-cobalt materials and lithium iron phosphate, and the negative electrode is carbon with a special molecular structure. A lithium battery generally includes a positive electrode, a negative electrode, an electrolyte, a separator, a positive electrode lead, a negative electrode lead, and a battery case. Since the lithium battery uses a colloidal electrolyte, there will be no leakage of electro-hydraulic...

AI Technical Summary

Problems solved by technology

The extreme low temperature in the low temperature environment of lithium batteries may be as low as below -40°C. Under such low temperature conditions, the electrochemical reaction speed will decrease, the output current and voltage of the battery will decrease, and the discharge capacity will also drop significantly. Such low temperature The performance obviously cannot meet the requirements of the power supply

On the contrary, the limit temperature in high temperature use environment can reach 50°C, even as high as 60°C, even if the high temperature performance of lithium iron phosphate battery is better, its discharge capacity will drop significantly

Images