Vehicle Battery Cooling Plate Layout for Collision Leak Prevention
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Solution Overview
Problem
In power storage devices mounted on vehicles, external forces such as collisions can damage the cooling plate, leading to refrigerant leakage and potential secondary battery cell leakage, which is undesirable.
Innovation Solution
The power storage device design includes a battery frame, battery trays, and a cooling plate with refrigerant flow paths and main pipes positioned on the outer side of the battery frame, overlapping it in the top-bottom direction, to prevent refrigerant from entering the battery trays and reduce the risk of secondary battery cell leakage during collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cooling plate is positioned to cool the battery block, then cooling efficiency is improved, but the cooling plate becomes vulnerable to external forces and damage
Solution Approach 1:
The main pipes are repositioned from a horizontal arrangement within the battery block to a vertical arrangement on the outer side of the battery frame. This dimensional change allows the pipes to overlap the battery frame in the top-bottom direction, placing them in a safer position that absorbs external forces while maintaining cooling functionality through the refrigerant flow path connection.
2Reliability
If the main pipes are positioned on the outer side of the battery frame, then protection from external forces is improved, but device complexity increases
Solution Approach 1:
The main pipes are merged with the cooling plate to form an integrated cooling system. The continuous refrigerant flow path between the main pipes and the cooling plate eliminates the need for separate connection components, simplifying the overall structure while maintaining the protective positioning of the pipes on the outer side of the battery frame.
3Object-generated harmful factors
If the cooling plate is damaged by external forces, then refrigerant leakage occurs, but preventing leakage requires additional protective structures
Solution Approach 1:
The main pipes are preliminarily positioned on the outer side of the battery frame in a location that naturally absorbs external forces before they can reach the cooling plate. This preliminary protective positioning prevents the cooling plate from being damaged by collisions, thereby preventing refrigerant leakage without requiring additional protective structures.
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 effectively prevents refrigerant from entering the battery trays, reducing the risk of secondary battery cell leakage and improving cooling efficiency by positioning the main pipes to absorb external forces, thereby enhancing the device's durability and maintainability.
Implementation Method 1
a cooling plate (13) having a plate portion (21) provided above the battery trays (12) and the battery frame (11) and having a refrigerant flow path (21c) through which a refrigerant flows
Implementation Method 2
the main pipes (22) are disposed on an outer side of the battery frame (11) so as to overlap the battery frame (11) in a top-bottom direction
Data Source
AI summary
A power storage device to be mounted below a floor of a vehicle includes a battery tray, a battery frame, and a cooling plate. The battery tray accommodates a secondary battery cell. The battery frame surrounds the battery tray. The cooling plate includes a plate portion provided above the battery tray and the battery frame and having a refrigerant flow path through which a refrigerant flows, and a main pipe disposed on an outer side of the battery frame so as to overlap the battery frame in a top-bottom direction and continuous with the plate portion such that the refrigerant flow path and an internal space of the main pipe communicate with each other.