Battery Pack Cooling Structure With Segmented Jackets
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Solution Overview
Problem
The existing cooling structures for battery packs in hybrid vehicles have complex and lengthy cooling medium passages due to the division of cooling medium jackets, which complicates the cooling process and increases the number of components.
Innovation Solution
A cooling structure where the first battery case is divided into left and right case bottom walls by a recess portion, allowing the first cooling medium jacket to communicate with the second cooling medium jacket through separate passages, thereby simplifying the structure and maintaining high cooling performance while minimizing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the cooling medium jacket at the first level is divided into left and right to avoid interference with the exhaust passage member, then the cooling medium passage becomes long and complicated, but the cooling performance can be maintained
Solution Approach 1:
The first cooling medium jacket is segmented into a left first cooling medium jacket and a right first cooling medium jacket, which are positioned on opposite sides of the exhaust passage member. This segmentation allows the cooling system to avoid interference with the exhaust passage while maintaining effective cooling coverage through separate cooling zones.
Solution Approach 2:
The left and right first cooling medium jackets are merged with the second cooling medium jacket through shared cooling medium passages. The left end of the left first cooling medium jacket communicates with the left end of the second cooling medium jacket via a left cooling medium passage, and similarly for the right side, creating an integrated cooling system that reduces overall complexity.
2Reliability
If the battery pack is formed by superimposing two battery cases with separate cooling medium jackets, then the cooling coverage is improved, but the number of components and passage complexity increases
Solution Approach 1:
The second cooling medium jacket serves multiple functions by being positioned to cool both the first battery case (through communication with left and right first cooling medium jackets) and the second battery case simultaneously. This multi-functional design extends cooling coverage to two levels without requiring completely separate cooling systems for each battery case.
Solution Approach 2:
The cooling medium passages are nested such that the left and right cooling medium passages connect the first cooling medium jacket with the second cooling medium jacket. This nested arrangement allows compact integration of multiple cooling zones while minimizing the number of external connections and components.
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 enables efficient cooling of battery packs with a simplified structure, reducing the number of components and ensuring high cooling performance even with a two-level cooling medium jacket system.
Implementation Method 1
a first cooling medium jacket through which cooling medium flows being formed on a lower face of the first battery case and a second cooling medium jacket through which cooling medium flows being formed on a lower face of the second battery case
Data Source
AI summary
In a cooling structure for a battery pack, a case bottom wall of a first battery case is divided into left and right case bottom walls. A first cooling medium jacket includes left and right first cooling medium jackets formed respectively in the left and right case bottom walls. Left ends of the left first cooling medium jacket and second cooling medium jacket are made to communicate with each other via a left cooling medium passage. Right ends of the right first cooling medium jacket and second cooling medium jacket are made to communicate with each other via a right cooling medium passage. Accordingly, it is possible to simplify the structure of a cooling medium passage for supplying cooling medium to a cooling medium jacket of battery cases on two levels.