Cylindrical Battery Side Vent Layout for Cooling and Capacity
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Solution Overview
Problem
Existing cylindrical battery cells face inefficiencies in venting and cooling due to the placement of vents at the bottom, which limits space utilization, cooling efficiency, and overall performance.
Innovation Solution
Repositioning the vents to the sidewall of the battery cell enclosure, allowing for direct welding of electrode tabs to the bottom plate, and incorporating a ventilation and cooling conduit system that enhances thermal conductivity and space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If vents are placed at the bottom of the battery cell, then the structure is simple, but space utilization is limited and cooling efficiency is reduced
Solution Approach 1:
The vent is relocated from the bottom (vertical dimension) to the sidewall (horizontal dimension) of the battery cell enclosure. This dimensional shift allows the vent to be positioned in a location that does not interfere with base cooling plate placement, thereby improving space utilization and allowing for more efficient thermal management without significantly increasing structural complexity
2Temperature
If vents are placed at the bottom of the battery cell, then the structure is simple, but cooling efficiency is reduced
Solution Approach 1:
By moving the vent to the sidewall, the bottom surface of the battery cell is fully available for thermal management components. This enables the implementation of a base cooling plate that can make full contact with the bottom surface, significantly improving cooling efficiency through enhanced thermal conduction without adding complex venting structures
3Reliability
If electrode tabs are welded to the bottom plate, then electrical connection is achieved, but venting space is blocked
Solution Approach 1:
The vent is positioned on the sidewall rather than the bottom, separating the venting function from the electrode tab welding location. This allows electrode tabs to be welded to the bottom plate for reliable electrical connection while the sidewall vent remains unobstructed, enabling effective pressure relief without compromising electrical connectivity
4Temperature
If base cooling plate is placed under the battery cell, then cooling contact is maximized, but vent placement is restricted
Solution Approach 1:
The vent is relocated to the sidewall, freeing up the bottom surface entirely for base cooling plate placement. This configuration allows the cooling plate to maximize contact with the bottom surface for efficient heat dissipation, while the sidewall vent provides unobstructed pressure relief capability, achieving both cooling effectiveness and venting functionality simultaneously
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
Improves cooling efficiency, increases cell capacity by 3%, reduces cell resistance, and extends battery life by maintaining homogeneous operating temperatures.
Implementation Method 1
a vent in the sidewall of the enclosure, the vent configured to open to release at least one of gas and ejecta out from within the enclosure when pressure within the enclosure exceeds a threshold
Implementation Method 2
a cooling conduit extends along sides of the plurality of battery cells, the side cooling conduit configured to direct coolant along the sides of the plurality of battery cells to cool the plurality of battery cells
Implementation Method 3
a base cooling conduit extends along the second end of each one of the plurality of battery cells, the base cooling conduit configured to direct coolant along the second end of each one of the plurality of battery cells to cool the plurality of battery cells
Implementation Method 4
The ventilation conduit includes an internal thermal barrier
Data Source
AI summary
A battery system including a battery cell. The battery cell including: an enclosure including a first end, a second end opposite to the first end, and a sidewall extending from the first end to the second end; a first terminal at a first end of the enclosure and a second terminal at a second end of the enclosure; an assembly of an anode electrode and a cathode electrode within the enclosure, the cathode electrode is connected to the first terminal and the anode electrode is connected to the second terminal; and a vent in the sidewall of the enclosure, the vent configured to open to release at least one of gas and ejecta out from within the enclosure when pressure within the enclosure exceeds a threshold.