Battery Module Cooling Layout With Split Heat Sinks
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Solution Overview
Problem
Conventional battery modules and packs face challenges in effectively dissipating heat generated by a large number of battery cells, leading to temperature deviations and increased risk of deterioration, explosion, or ignition, especially under high-temperature conditions.
Innovation Solution
A battery module design featuring separate first and second heat sinks and thermal conductive resin layers, with distinct refrigerant flow paths and concentrated cooling functions, minimizing temperature deviations and improving heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a large number of battery cells are stacked in a narrow space to improve capacity and output, then high output is obtained, but heat dissipation becomes difficult and temperature rises excessively
Solution Approach 1:
The patent divides the cooling system into multiple independent heat sinks (first heat sink and second heat sink) with separate refrigerant flow paths. This segmentation allows heat from different battery cell regions to be dissipated independently, preventing heat accumulation and excessive temperature rise while maintaining high output capacity
Solution Approach 2:
The patent applies thermal conductive resin layers at specific locations where heat generation is concentrated, and positions heat sinks to correspond with high-heat-generation regions. This localized approach optimizes heat dissipation efficiency without requiring uniform cooling across the entire battery module, thereby managing temperature effectively while maintaining high power output
2Device complexity
If a single heat sink with a unified refrigerant flow path is used, then device complexity is reduced, but temperature deviations occur and cooling performance deteriorates
Solution Approach 1:
The patent segments the cooling system into multiple heat sinks with separate refrigerant flow paths, allowing independent temperature control for different battery regions. This prevents temperature deviations and improves cooling reliability while maintaining manageable system complexity through modular design
Solution Approach 2:
The patent optimizes refrigerant flow parameters by creating separate flow paths with potentially different flow rates and temperatures tailored to specific heat generation zones. This parameter differentiation improves cooling effectiveness and reliability without significantly increasing overall system complexity
3Temperature
If thermal conductive resin layers and heat sinks are positioned to optimize cooling, then cooling performance is improved, but space utilization becomes constrained and device complexity increases
Solution Approach 1:
The patent positions heat sinks and thermal conductive resin layers in the vertical dimension beneath the battery cell stack, utilizing the Z-axis space rather than consuming horizontal footprint. This dimensional approach optimizes cooling performance while preserving space utilization in the planar dimensions
Solution Approach 2:
The patent integrates thermal conductive resin layers within the existing battery module structure, positioning them between battery cells and heat sinks in a nested arrangement. This nesting approach achieves effective cooling without adding external components that would consume additional space
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances cooling performance, reduces temperature deviations, and optimizes space utilization while reducing the need for large refrigerant pumps, thereby improving safety and efficiency.
Implementation Method 1
a first thermal conductive resin layer and a second thermal conductive resin layer that are located between the lower surface of the battery cell stack and the bottom part of the housing
Implementation Method 2
a first heat sink and a second heat sink that are located under the bottom part of the housing; first and second refrigerant flow paths formed between the first heat sink and the bottom part of the housing and between the second heat sink and the bottom part of the housing
Data Source
AI summary
A battery module including: a battery cell stack in which a plurality of battery cells including electrode leads protruding in mutually opposite directions are stacked; a housing that houses the battery cell stack; a first heat sink and a second heat sink that are located under the bottom part of the housing, and first and second refrigerant flow paths formed between the first heat sink and the bottom part of the housing and between the second heat sink and the bottom part of the housing, respectively. The refrigerant flow path formed by the first heat sink and the refrigerant flow path formed by the second heat sink are separated from each other.