Active and passive cooling for an energy storage module

Abstract

The present disclosure relates to cooling an energy storage module using passive and active cooling techniques. Passive cooling is provided by storing heat in a phase change material that is contact with the energy storage cells of the energy storage module. Active cooling is provided by circulating coolant through coolant passages that are in thermal contact with the energy storage cells. A control system for determining the temperature of the energy storage module and controlling coolant flow when the temperature reaches a predetermined threshold is disclosed.

Description

TECHNICAL FIELD[0001]The present disclosure relates cooling an energy storage module, and more particularly, an energy storage module equipped with coolant passages and a phase change material.BACKGROUND[0002]Energy storage modules are increasingly used in mobile and stationary applications. Uses include hybrid and electric drive vehicles, as well as stationary power generation. The modules usually contain battery or ultracapacitor cells as a way of storing electrical energy for long periods of time, and / or rapidly charging or discharging as needed. The charge / discharge process quickly generates a large amount of heat, which should be managed. Also, the performance and life of the cells depends upon their temperature. Therefore, the steady state temperature of the cells should be managed.[0003]A further requirement of the energy storage module is that it is capable of operation when exposed to harsh environments. Shock and vibration are problematic when packaging energy storage cell...

AI Technical Summary

Benefits of technology

The patent describes a method, system, and devices for cooling an energy storage module. This involves using a phase change material in thermal contact with a coolant passage and the energy storage cells to cool the module. The method involves determining the first temperature of the module, comparing it to preset thresholds, and adjusting the coolant flow based on the comparison. The technical effect is to improve the efficiency and reliability of energy storage modules by managing their thermal conditions.

Problems solved by technology

Shock and vibration are problematic when packaging energy storage cells into an energy storage module.

Such movement can break inter-cell connections or wear through the protective case of the cell.

Excess heat or a manufacturing defect can lead to high levels of heat in a cell which can then cause the destruction of the cell, known as thermal runaway.

Destruction of a cell can cause heat damage to adjacent cells which can in turn cause destruction of one or more of the adjacent cells.

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