用于控制的降阶的电池热动力学建模

Reduced order battery thermal dynamics modeling for controls

Abstract

公开了一种用于控制的降阶的电池热动力学建模。一种车辆包括牵引电池,牵引电池由多个电池单元组成。控制器根据每个电池单元的温度操作牵引电池。温度基于多个系数,所述多个系数表示至少一个电池单元边界热状况和在电池单元中产生的热对电池单元内的预定位置的稳态温度的贡献。贡献可被过滤,以预测温度对所述至少一个电池单元边界热状况和在电池单元中产生的热的变化的动态响应。可从全阶模型推导出所述多个系数。产生的降阶的模型需要较少的执行时间,同时获得与全阶模型相似的精确性。此外,可针对每个电池单元获得特性温度的范围。
The invention discloses reduced order battery thermal dynamics modeling for controls. A vehicle includes a traction battery that is comprised of a number of cells. A controller operates the traction battery according to a temperature for each of the cells. The temperature is based on a number of coefficients representing a contribution of at least one cell boundary thermal condition and a heat generated in the cell to a steady-state temperature at a predetermined location within the cell. The contributions may be filtered to predict a dynamic response of the temperature to changes in the boundary thermal conditions and the heat generated in the cell. The coefficients may be derived from a full-order model. The resulting reduced-order model requires less execution time while achieving accuracy similar to the full-order model. In addition, a range of characteristic temperatures may be obtained for each cell.

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