Design Of Lithium-ion Battery Pack Discharge Regulatted Module

With the highly developed lithium battery technology and green energy concept, high-capacity lithium-ion batteries have been widely used in many industries, like aerospace electric cars, electric bicycles, hybrid cars, solar power systems and other new energy and aerospace fields. In high-power applications, make full use of serial-parallel technology put multi-cell lithium battery into battery pack to meet the requirements.Performance spacecraft power system is one of the key factors that determine the success or failure of a spacecraft mission. As a main component of the power controller, the discharging performance of battery discharge regulator plays a major role. Output voltage, discharging current and so on is important indicators of the battery discharge current battery discharge performance.therefore, the battery discharge technology research priorities should be focused on controlling these parameters.This paper designs the Lithium-ion battery pack discharging module. The module which is based on Boost Topology uses Average current control method, the simulation results reflect closed loop circuit’s stability by establishing Small signal modeling. The paper establishes Lithium-ion battery pack’s hardware design platform, hardware circuits give the main circuit and single module design parameters, including the driver circuit, protection circuit, sampling circuit and control circuit design. Because of the application environment is aerospace power, security, and stability is primary considerations. Lithium-ion battery pack discharging module use backup mode, this paper gives the design based on cold backup and hot backup mode separately. The design of hot backup mode achieves dynamical allocation of variable reference. In two backup solutions, Lithium-ion battery pack discharging module have achieved constant discharging current with high accuracy and efficiency, the results reflect stability and viability of discharging module in two programs.The paper Completes the dynamical pulsed current load by designing pulsed current generation circuit. Lithium ion battery module is used as pulse current generating circuit’s pre-discharging circuit, the capacitor charging circuit of the pulse current regulator is charged to a predetermined value, then the pulse current circuit performed the pulse load under logic control circuits. It achieves lithium ion battery pack’s pulsed current discharge indirectly.