Battery Heat Exchange Assembly With Protrusions for Fast-Charge Cooling
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Solution Overview
Problem
Existing battery packs face issues with low heat exchange efficiency, particularly under high-charging-rate conditions, leading to excessive heat generation, reduced service life, and safety hazards.
Innovation Solution
A heat exchange assembly with protrusion structures on the heat exchange walls to increase surface area and structural strength, enhancing heat dissipation efficiency and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single liquid-cooling solution is adopted for cylindrical battery cells, then the device complexity is reduced, but the heat exchange efficiency deteriorates
Solution Approach 1:
The cooling plate is segmented into multiple independent cooling channels instead of using a single liquid-cooling solution. Each cooling channel is independently designed to optimize heat exchange with specific battery cell groups, thereby improving heat exchange efficiency while maintaining reasonable device complexity
Solution Approach 2:
Different regions of the cooling plate are designed with different cooling channel configurations to match the local heat generation characteristics of battery cells. The cooling channels are positioned and sized according to the thermal distribution map of the battery pack, providing localized optimal cooling where needed most
2Productivity
If the charging rate is increased to meet user demands, then the productivity is improved, but the temperature control deteriorates
Solution Approach 1:
The cooling channels are pre-configured in the cooling plate before battery operation, with optimal positioning and dimensions determined in advance. This preliminary design ensures that when high charging rates are applied, the cooling system is already in place to immediately manage the increased heat generation, maintaining temperature control during high-productivity operation
Solution Approach 2:
Multiple identical cooling channel structures are replicated across the cooling plate to match the battery cell arrangement. Each cooling channel copy serves a specific group of battery cells, ensuring uniform temperature control across all cells even during high-rate charging when heat generation is maximized
3Reliability
If the heat exchange area is increased to improve heat dissipation, then the heat exchange efficiency is improved, but the structural strength deteriorates
Solution Approach 1:
The cooling channels are designed with three-dimensional depth and cross-sectional variations rather than simple two-dimensional flat channels. This dimensional complexity allows increased heat exchange surface area within the same planar footprint, improving heat dissipation without requiring a larger cooling plate that would compromise structural strength
Solution Approach 2:
The cooling plate is designed as a composite structure combining cooling channels with reinforcing ribs. The channels provide heat exchange functionality while the ribs provide structural reinforcement, creating a composite system that simultaneously achieves high heat exchange efficiency and maintains the structural strength needed to support battery cells
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
Improves heat exchange efficiency, maintains optimal battery cell temperatures, and enhances structural integrity, thereby prolonging the battery's service life and improving safety.
Implementation Method 1
the heat exchange wall is in heat exchange with the fluid channel
Implementation Method 2
to increase a heat exchange area of the heat exchange body and enhance structural strength of the heat exchange body
Data Source
AI summary
The present disclosure provides a heat exchange assembly for a battery, including: a heat exchange body, where a fluid channel is provided inside the heat exchange body, and at least one heat exchange wall is further provided on the heat exchange body, the heat exchange wall being configured to be in contact with a side surface of a battery cell, and the heat exchange wall being in heat exchange with the fluid channel; and a plurality of protrusion structures, where each protrusion structure is located on a side, of the heat exchange wall, that is close to the fluid channel, and two adjacent protrusion structures abut against each other, to increase a heat exchange area of the heat exchange body and enhance structural strength of the heat exchange body.