Side Bus Bar Heat Dissipation in Battery Packs
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Solution Overview
Problem
Conventional battery packs have inefficient heat dissipation due to the placement of heat dissipation members at the bottom of the battery module, rather than at the side surface where heat is generated most, leading to increased thickness and manufacturing costs.
Innovation Solution
A battery pack design where a heat dissipation member is positioned in contact with the bus bar at the side surface of the battery module, allowing for direct heat emission from the electrode leads and bus bar, and incorporating a thermal pad and heatsink to enhance cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the heat dissipation member is placed at the bottom portion of the battery module, then the structure is simple and easy to manufacture, but the heat dissipation efficiency is low because heat is not effectively removed from the electrode leads and bus bar where it is generated most
Solution Approach 1:
The heat dissipation member is positioned to contact specifically the electrode leads and bus bar at the side surface of the battery module, rather than uniformly distributing heat dissipation across the entire bottom portion. This localized approach targets the specific regions where heat is generated most, improving heat dissipation efficiency while maintaining manufacturing simplicity
Solution Approach 2:
The heat dissipation member is moved from the bottom surface (horizontal dimension) to the side surface (vertical dimension) of the battery module, where it can directly contact the electrode leads and bus bar. This dimensional change allows the heat dissipation member to target the heat generation sources more effectively without complicating the manufacturing process
2Reliability
If the thermal pad and heatsink are coupled to the bottom portion of the battery module, then the heat dissipation structure is complete, but the total height of the battery pack is increased
Solution Approach 1:
The heat dissipation components are repositioned from the bottom surface to the side surface of the battery module. This dimensional shift allows heat dissipation to occur laterally rather than vertically, reducing the total height requirement of the battery pack while maintaining effective heat removal from the electrode leads and bus bar
3Reliability
If the thermal pad and heatsink are manufactured to have a size corresponding to the total size of the bottom portion of the battery module, then the heat dissipation coverage is maximized, but the manufacturing cost increases due to the large area required
Solution Approach 1:
The heat dissipation member is sized and positioned to cover only the electrode leads and bus bar regions at the side surface, rather than covering the entire bottom portion of the battery module. This localized heat dissipation approach reduces the required area of the thermal pad and heatsink, thereby lowering manufacturing costs while maintaining effective heat removal from the critical heat generation zones
Solution Approach 2:
The unnecessary portions of the heat dissipation member that would cover non-heat-generating areas are removed. By extracting only the essential heat dissipation function needed for the electrode leads and bus bar, the design reduces material usage and manufacturing cost while maintaining adequate heat dissipation performance
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 improves heat dissipation efficiency, reduces the overall height of the battery pack, and decreases manufacturing costs by minimizing the area of the heat dissipation member required.
Implementation Method 1
a heat dissipation member provided in contact with a bus bar at a side surface of the battery module where electrode leads of the plurality of battery cells and the bus bar coupled to the electrode leads are disposed
Implementation Method 2
incorporating a thermal pad and heatsink to enhance cooling efficiency
Data Source
AI summary
Disclosed is a battery pack including a battery module having a plurality of battery cells, and a heat dissipation member provided in contact with a bus bar at a side surface of the battery module where electrode leads of the battery cells and the bus bar coupled to the electrode leads are disposed.