Energy Storage Module Cooling System for Uniform Cell Temperature
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Solution Overview
Problem
Existing energy storage modules face reduced service life due to uneven cooling, which causes significant temperature differences between storage cells, leading to increased thermal stress and premature degradation.
Innovation Solution
The energy storage module incorporates a cooling system that dissipates heat from both storage cells and connection conductors, using a rigid busbar with a flat cooling surface and an electrically insulating, thermally conductive intermediate layer, or flexible power cables wound around a heat sink, to maintain uniform temperature across all cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only storage cells are cooled without cooling connection conductors, then the cooling system is simpler, but temperature differences between storage cells increase significantly
Solution Approach 1:
The connection conductors serve as thermal intermediaries between the storage cells and the cooling device. By cooling the connection conductors, thermal energy is extracted from the storage cells through these intermediary elements, achieving uniform temperature distribution without directly cooling each cell
Solution Approach 2:
The connection conductors perform dual functions: electrical connection between storage cells and thermal conduction to the cooling device. This multi-functionality allows the same component to serve both electrical and thermal management purposes, simplifying the overall cooling system
2Reliability
If connection conductors are cooled to achieve uniform temperature, then service life of storage cells is extended, but the cooling system becomes more complex
Solution Approach 1:
The connection conductors are designed to serve both electrical connection and thermal conduction functions simultaneously. This multi-functionality extends service life through uniform cooling without requiring separate cooling components for each storage cell
Solution Approach 2:
The cooling system merges the electrical connection function and thermal management function into a single integrated approach. The connection conductors are thermally coupled to the cooling device, combining electrical and thermal pathways into one system
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 approach ensures more uniform temperature control, thereby extending the service life of the energy storage module by effectively managing thermal energy dissipation and reducing temperature variations.
Implementation Method 1
an electrically insulating and thermally conductive intermediate layer
Implementation Method 2
an electrically insulating and thermally conductive intermediate layer
Implementation Method 3
a cooling body of the cooling device... the heat sink can, for example, extend over a housing wall
Implementation Method 4
thermal energy produced in it can be dissipated
Data Source
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AI summary
The invention relates to an energy storage module (1), comprising a plurality of storage cells (2', 2) for electrical energy which are electrically connected in series, a module housing (5) which surrounds the storage cells (2', 2), a module port (6) arranged on the module housing (5) for the purpose of making external electrical contact with the storage cells (2', 2), a supply lead that electrically connects the module port (6) to a first of the series-connected storage cells (2', 2), and a cooling device which is thermally coupled to the storage cells (2' 2) for the purpose of absorbing and dissipating heat energy. According to the invention, the supply lead is designed and arranged such that heat energy generated in it can be dissipated. This evens out the cooling of the storage cells and hence extends the life of the storage cells and hence that of the entire energy storage module.