Pouch Battery Cell Structure for Lateral Face Cooling
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Solution Overview
Problem
Existing battery cell designs face challenges in effectively cooling the lateral faces, which can lead to overheating and potential fires due to limited cooling surface areas.
Innovation Solution
A battery cell design featuring a pouch cover extending from the pouch sheet wrapping the electrode assembly and a heat transfer unit contacting the lateral face, along with a battery module configuration that includes multiple cells with these features, to enhance heat dissipation from both lateral faces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a cooling plate contacts one edge of the battery cell, then heat can be discharged from that edge, but the cooling surface area is limited and cannot effectively cool the lateral faces
Solution Approach 1:
The pouch cover extends from the top end of the cell body in a direction perpendicular to the lateral faces, creating a three-dimensional heat dissipation structure. This extension allows the cooling surface to reach lateral faces that would otherwise be inaccessible to a conventional edge-contacting cooling plate, effectively adding a new spatial dimension to the cooling approach.
Solution Approach 2:
The pouch cover acts as an intermediary component between the cell body and the external environment. It extends from the top end to contact lateral faces, serving as a mediator that transfers heat from areas not directly accessible to the cooling plate, thereby enhancing overall cooling effectiveness.
2Device complexity
If the pouch sheet is simply wrapped around the electrode assembly, then the structure is simple, but heat cannot be effectively removed from lateral faces
Solution Approach 1:
The pouch sheet is segmented into functional zones: a main body wrapping the electrode assembly and a延伸 portion (pouch cover) extending from the top end. This segmentation allows different parts of the pouch sheet to serve different functions - the main body provides structural containment while the延伸 portion provides lateral face cooling contact.
Solution Approach 2:
The pouch sheet serves multiple functions: it acts as a protective wrapper for the electrode assembly, provides structural integrity, and through its延伸 portion, creates a heat transfer path to lateral faces. This multi-functionality allows a single component to address both structural and thermal management requirements.
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 effectively removes heat from both lateral faces of the battery cell, improving cooling performance and reducing the risk of overheating and thermal runaway.
Implementation Method 1
a heat transfer unit disposed between the cell body and the pouch cover
Data Source
AI summary
A battery cell and a battery module including the same are disclosed. The battery cell includes a cell body including an electrode assembly and a pouch sheet wrapping the electrode assembly, the cell body extending from a lower end and leading to an upper end, the pouch sheet overlapping and contacting each other at the upper end; a pouch cover formed of the pouch sheet, the pouch cover extending from the upper end of the cell body and facing a lateral face of the cell body; and a heat transfer unit disposed between the cell body and the pouch cover.