Battery cell cooling structure

Battery cell cooling structure with reduced temperature deviation using a graded thermal conductivity multilayer design

This technology minimizes temperature gradients across battery cells by utilizing a thermal interface module between the battery cell and the cooling plate, featuring a multilayer structure (first to third conductive layers) with progressively increasing thermal conductivity from the inlet to the outlet, combined with adjustable cross-sectional areas (converging/diverging channels) for the internal fluid pipes of the cooling plate.

Conventional cooling structures suffer from significant temperature deviations within battery cells due to the temperature difference between the coolant inlet and outlet, and attempts to resolve this using heat pipes or phase-change materials often lead to increased system complexity and costs.

This technology offers a distinct competitive advantage in the battery thermal management and safety system market by 1) utilizing a hybrid thermal interface module (TIM) configured with layers of increasing thermal conductivity along the direction of coolant flow, from low at the inlet to high at the outlet.

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Key Features:

• A cooling plate comprising an inlet for coolant, fluid channels for circulation, and an outlet.
• A thermal interface module positioned between the battery cell and the cooling plate to facilitate heat exchange between the coolant and the battery cell.
• A configuration where the thermal interface module includes first through third conductive layers with thermal conductivity that increases in stages from the inlet side to the outlet side.
• A battery cell cooling structure that reduces overall cell temperature deviation through a graded thermal conductivity multilayer design.

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