Battery Pack Thermal Conduction Layout for Vertical Temperature Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery packs face reduced service life due to temperature differences across the assembly, as current temperature control systems only effectively cool one side, leading to uneven heat distribution and potential thermal runaway.
Innovation Solution
A battery pack design incorporating a thermally conductive beam and cover that forms a chamber with a temperature control component, along with a thermal barrier layer, to balance heat distribution and reduce temperature differences between upper and lower regions, enhancing thermal uniformity and consistency of depth of discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a temperature control system is provided only at the bottom of the case to cool the battery assembly, then the cooling structure is simple and cost-effective, but the battery assembly forms temperature difference in height direction with non-uniform temperature distribution
Solution Approach 1:
The patent introduces a thermally conductive cover that extends the thermal management in the vertical dimension. The cover is in thermal contact with the battery assembly and conducts heat from the upper portion, complementing the bottom cooling system and achieving three-dimensional heat dissipation, thus resolving the temperature uniformity issue without significantly increasing system complexity.
2Device complexity
If only one side of the battery assembly is actively cooled by the temperature control system, then the cooling system is simple, but the service life of the battery assembly is reduced due to large temperature difference between two sides
Solution Approach 1:
The patent segments the thermal management function into two parts: bottom cooling (temperature control system) and top cooling (thermally conductive cover). This segmentation allows heat to be dissipated from both ends of the battery assembly, reducing the temperature difference between sides and preventing thermal stress that would reduce service life, while maintaining relative system simplicity.
3Device complexity
If the temperature control system cools only the bottom region, then the system design is simple, but the depth of discharge consistency deteriorates due to uneven temperature distribution
Solution Approach 1:
The thermally conductive cover acts as an intermediary element between the battery assembly and the ambient environment. It mediates heat transfer from the upper portion of the battery assembly, working in conjunction with the bottom cooling system to achieve uniform temperature distribution, which ensures consistent electrochemical reactions and depth of discharge across all 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
The solution effectively balances temperature distribution along the height of the battery pack, reducing temperature differences and improving the service life by ensuring consistent thermal management and preventing thermal runaway.
Implementation Method 1
the thermally conductive beam being disposed in the case and connected to the case, and the temperature control component being disposed in a bottom region of the case; a thermally conductive cover connected to the thermally conductive beam
Implementation Method 2
a thermal barrier layer disposed between a bottom surface of the battery assembly and an inner bottom surface of the case, where a thermal conductivity coefficient of the thermal barrier layer is smaller than a thermal conductivity coefficient of the thermally conductive beam
Data Source
AI summary
The present application relates to a battery pack, a method for manufacturing a battery pack and a vehicle. The battery pack includes a case assembly including a case, a thermally conductive beam and a temperature control component, the thermally conductive beam being disposed in the case and connected to the case, and the temperature control component being disposed in a bottom region of the case; a thermally conductive cover connected to the thermally conductive beam and located above the thermally conductive beam along a height direction of the battery pack, where the thermally conductive cover, the case and the thermally conductive beam enclose and form a first chamber; and a plurality of battery cells integrally forming a battery assembly, the battery assembly being disposed in the first chamber and located above the temperature control component.