Battery Module Assembly With Side-Wall Cooling for Uniform Cell Temperature
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Solution Overview
Problem
Existing battery pack thermal management systems face inefficiencies due to the smaller bottom area of battery cells, leading to suboptimal heat dissipation and uneven temperature control, which can result in safety hazards and reduced service life.
Innovation Solution
A battery module assembly design where battery cells are arranged with a larger first side wall perpendicular to the direction of heat exchange, allowing a cooling plate to effectively interact with the maximum surface area, and incorporating a thermally conductive adhesive layer for enhanced heat transfer, along with a separator beam to improve structural rigidity and assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the cooling plate is arranged on the bottom of the battery pack to control battery cell temperature, then thermal management function is provided, but the heat dissipation efficiency is suboptimal due to the smaller bottom area of battery cells
Solution Approach 1:
The cooling plate is repositioned from the bottom of the battery pack to the side wall of the battery module, changing the spatial dimension of heat exchange. This allows the cooling plate to contact the larger first side wall of the battery cell instead of the smaller bottom surface, significantly increasing the effective heat dissipation area and improving thermal management efficiency.
2Temperature
If the cooling plate contacts the battery cell to remove heat, then temperature control is achieved, but uneven temperature control occurs due to suboptimal heat dissipation
Solution Approach 1:
By relocating the cooling plate to the side wall position and orienting it to contact the larger first side wall of the battery cell, the patent achieves more uniform heat dissipation across the battery cell surface. This dimensional change in heat exchange geometry eliminates hot spots and ensures balanced temperature control throughout the battery module.
3Loss of energy
If the first side wall of the battery cell is used for heat exchange, then heat dissipation efficiency is improved, but the battery cell structure must be specifically oriented
Solution Approach 1:
The patent designates the first side wall of the battery cell as the primary heat exchange surface, giving it a specific functional quality that differs from other surfaces. The cooling plate is specifically configured to contact this designated area, optimizing heat dissipation from the most effective location on the battery cell structure.
Solution Approach 2:
The battery cells are arranged with their first side walls oriented to face the cooling plate, creating a specific spatial configuration. This dimensional arrangement allows multiple battery cells to efficiently exchange heat with the cooling plate simultaneously, improving overall system heat dissipation without excessive complexity.
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
This design enhances heat dissipation efficiency, ensures balanced temperature control, reduces the risk of thermal runaway, and improves the overall safety and longevity of the battery pack by effectively managing temperature across the battery cells.
Implementation Method 1
a cooling plate arranged between two adjacent battery modules to perform heat exchange with the first side walls of the battery cells of the two adjacent battery modules
Implementation Method 2
the cooling plate is heated to control the temperature of the battery cell
Implementation Method 3
a thermally conductive adhesive layer arranged between the cooling plate and the first side wall of the battery cell adjacent to the cooling plate
Data Source
AI summary
A battery module assembly, a battery pack, and a device using a battery as a power source are provided. The battery module assembly includes: at least two battery modules arranged along a first direction, each of the battery modules including a plurality of battery cells, and a shell side wall of the battery cell including two oppositely arranged first side walls and two oppositely arranged second side walls, an area of the first side wall being larger than that of the second side wall, and the first side wall being perpendicular to the first direction; and a cooling plate arranged between two adjacent battery modules, and configured to perform heat exchange with the first side walls of the battery cells of the two adjacent battery modules. The battery pack includes the battery module assembly. The device using a battery as a power source includes the battery pack.