Battery pack multi-cell state estimation

• Main Authors: ARROYO XAVIER, MONTSERRAT, HUGHES, JOHN, T
• Format: Patent
• Language: Chinese; English
• Published: 17.02.2023
• Subjects: ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL

The invention provides battery pack multi-cell state estimation. A controller discharges a traction battery according to a power limit defined by an output indicative of a state of charge of the traction battery and updated by a bar delta filter according to a balancing current. The balancing current is associated with each cell in a string of series connected cells of the traction battery and represents a deviation of an estimated current through the cell from a total current of the string. 本公开提供了"电池组多单元状态估计"。一种控制器根据由指示牵引电池的荷电状态并由条形Δ滤波器根据平衡电流进行更新的输出限定的功率限制对所述牵引电池进行放电。所述平衡电流与所述牵引电池的串联连接单元串中的每个单元相关联并且表示通过所述单元的估计电流与所述串的总电流的偏差。