Connection Module Ventilation Passage for Battery Heat Dissipation
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Solution Overview
Problem
Conventional power storage modules face challenges in effectively dissipating heat generated by connection members, which can lead to increased temperatures and potential thermal deformation of insulation protectors, affecting battery performance, especially in restricted installation conditions where active cooling methods are difficult to implement.
Innovation Solution
A connection module with a cover featuring intake and exhaust ports positioned vertically, creating a ventilation passage that utilizes the chimney effect to efficiently dissipate heat generated by the connection member, enhanced by ribs for improved airflow and structural rigidity, allowing for effective heat dissipation through natural convection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover is provided to cover the connection member for insulation and protection, then the insulation and protection of the connection member is improved, but heat is accumulated inside the cover and the temperature inside the connection module becomes high
Solution Approach 1:
The cover is designed with intake ports and exhaust ports creating a ventilation passage, allowing air to flow through the cover structure. This porous-like configuration enables heat dissipation while maintaining the protective enclosure, resolving the contradiction between protection and heat accumulation.
Solution Approach 2:
Air is introduced as an intermediary medium to transfer heat from the connection member to the external environment. The ventilation passage allows air to flow through the cover, absorbing heat from the connection member and carrying it outside, thus mediating between the protected connection member and the external cooling environment.
2Temperature
If blast cooling is performed by arranging a blower, then heat dissipation is improved, but installation conditions and costs are restricted
Solution Approach 1:
The connection module performs its own cooling function through naturally convecting air that flows through the ventilation passage. The structure itself provides the cooling mechanism without requiring external active cooling devices, achieving self-service heat dissipation that reduces installation complexity and cost.
Solution Approach 2:
The mechanical cooling system (blower) is replaced with a passive natural convection system. The ventilation passage structure replaces the need for mechanical air movement, using natural air flow driven by temperature differences instead of mechanical forcing, thus eliminating the blower and associated complexity.
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
The solution effectively reduces internal heat within the connection module, enhancing cooling efficiency without increasing manufacturing costs or complexity, while ensuring safe and efficient operation, particularly suitable for power storage modules in vehicles.
Implementation Method 1
heat inside the connection module can be efficiently dissipated due to the chimney effect. Specifically, air that flows into the connection module from the intake port provided in the cover is warmed by coming into contact with the connection member arranged inside the ventilation passage. The air whose density has been reduced by being warmed becomes lighter, goes up inside the ventilation path, and flows out from the exhaust port
Data Source
AI summary
A connection module attachable to a power storage element group formed by lining up a plurality of power storage elements is provided with a bus bar (connection member) that extends in a vertical direction and is connected to electrode terminals, an insulating protector having a holding portion that holds the bus bar, and a cover that covers the bus bar. The cover is provided with an intake port and an exhaust port positioned above the intake port, and a ventilation passage through which air can flow in the vertical direction is formed between the cover and the holding portion, the ventilation passage being in communication with the intake port and the exhaust port, and the bus bar is arranged inside the ventilation passage.