Prismatic Battery Cell Casing With Integrated Coolant Recess
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Solution Overview
Problem
High temperatures negatively impact the performance and service life of prismatic battery cells in electric energy storage systems, necessitating effective cooling solutions that are both cost-effective and efficient.
Innovation Solution
Integration of a coolant recess within the outer casing of prismatic battery cells, featuring a longitudinal extension with a coolant inlet and outlet, and optionally including offset wall segments and sealing elements, to enhance heat dissipation and coolant flow, thereby improving cooling efficiency and packaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling system with coolant conduits is implemented, then cooling performance is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The coolant conduit is integrated directly into the outer casing of the battery cell, merging the structural housing function with the thermal management function. This eliminates the need for separate cooling components and reduces overall system complexity while maintaining effective cooling performance.
Solution Approach 2:
The outer casing serves dual purposes: providing mechanical protection/structural support and functioning as a coolant conduit for thermal management. This multi-functionality reduces the number of separate components needed in the system.
2Temperature
If a cooling system with coolant conduits is implemented, then cooling performance is improved, but manufacturing cost increases
Solution Approach 1:
The coolant conduit is formed as an integral part of the outer casing during the same manufacturing process, eliminating the need for separate manufacturing steps and assembly operations. This reduces manufacturing complexity and cost while achieving effective cooling.
Solution Approach 2:
The outer casing structure itself provides the cooling function through its integrated coolant conduit design, eliminating the need for additional dedicated cooling components and reducing overall system manufacturing costs.
3Volume of moving object
If battery cells are connected in compact arrangements, then space utilization is improved, but cooling homogeneity deteriorates
Solution Approach 1:
The coolant conduit is positioned to extend along the longitudinal direction of the battery cell, creating localized cooling zones that can be optimized for different thermal conditions. This allows for homogeneous cooling across the cell while maintaining compact packaging arrangements.
Solution Approach 2:
The longitudinal extension of the coolant conduit ensures uniform coolant flow distribution along the length of the battery cell, creating equipotential thermal conditions that promote homogeneous cooling across all cells in the battery assembly, even in compact arrangements.
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 configuration provides improved cooling performance, increased service life, and cost-effective manufacturing, while allowing for compact and homogenous cooling of connected battery cells, enhancing the reliability and efficiency of electric energy storage systems.
Implementation Method 1
the recess for coolant extends in the longitudinal direction from the coolant inlet portion to the coolant outlet portion
Implementation Method 2
increased heat dissipation to the coolant
Data Source
AI summary
A prismatic battery cell for an electric energy storage system, the prismatic battery cell extending in a longitudinal direction, a width direction and a height direction, the prismatic battery cell comprising an outer casing for enclosing an electrochemical cell, the outer casing having a longitudinal extension in the longitudinal direction and a width extension in the with direction; wherein the outer casing comprises a bottom end section, as seen in the height direction; wherein the bottom end section comprises a recess for coolant; and wherein the recess for coolant extends in the longitudinal direction from a coolant inlet portion to a coolant outlet portion. A battery assembly, an electrical energy storage system, and a vehicle are also disclosed.