Battery Module Cooling Structure for Uniform Cell Temperature
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Solution Overview
Problem
Existing battery technologies face issues with temperature unevenness leading to lithium plating and dendrite growth, which can cause damage and thermal runaway, particularly exacerbated by rapid charging, necessitating improved heat management for safety and cycle performance.
Innovation Solution
A battery module design incorporating a cell assembly, a module case, a cooling member, and a heat dissipation member with protruding portions to manage heat distribution and temperature uniformity, including a heat dissipation member with varying protrusions to target high-temperature areas and electrode terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rapid charging is performed to increase charging speed, then charging efficiency is improved, but heat generation increases causing temperature unevenness and safety issues
Solution Approach 1:
The heat dissipation member is designed with varying thickness to provide localized heat dissipation capacity. The thicker portions are positioned at locations where temperature tends to concentrate, enabling targeted heat dissipation exactly where needed during rapid charging operations.
Solution Approach 2:
The heat dissipation member acts as an intermediary component between the battery cell and the cooling member. It receives heat from the battery cell and transfers it to the cooling member, facilitating efficient heat management during rapid charging while maintaining temperature uniformity.
2Reliability
If heat dissipation member is added to improve temperature uniformity, then safety and cycle performance are improved, but device complexity increases
Solution Approach 1:
The heat dissipation member is integrated with the cooling member to form a combined heat management structure. This merging of functions reduces the number of separate components and simplifies the overall device structure while maintaining improved temperature uniformity and cycle performance.
Solution Approach 2:
The heat dissipation member serves multiple functions: it acts as a thermal management component, a structural support element, and a space optimizer. By combining these functions into a single component, the device complexity is minimized while achieving multiple technical objectives.
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
The design effectively reduces local temperature differences, preventing lithium plating and dendrite growth, ensuring stable performance and safety by maintaining temperature uniformity and suppressing thermal runaway.
Implementation Method 1
a cooling member disposed at least on one side of the cell assembly and configured to discharge heat through a coolant
Implementation Method 2
a heat dissipation member disposed to face at least one battery cell and configured to transfer heat from the battery cell to the cooling member
Data Source
Figure 1
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AI summary
Disclosed is a battery module with improved cycle performance. The battery module according to one aspect of the present disclosure includes: a cell assembly including a plurality of battery cells stacked in at least one direction and respectively configured to provide an electrode terminal; a module case configured to accommodate the cell assembly in an inner space; a cooling member disposed at least on one side of the cell assembly and configured to discharge heat through a coolant; and a heat dissipation member disposed to face at least one battery cell and configured to transfer heat from the battery cell to the cooling member and partially protrude from a side of the cooling member.