Busbar Holder Insulator for Battery Cell Vent Fire Isolation
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Solution Overview
Problem
In battery modules, gases and flammable materials discharged from abnormal battery cells can quickly spread to other cells, leading to potential fire accidents due to the lack of effective venting and containment mechanisms.
Innovation Solution
A busbar holder with an insulator that includes cell vent covering portions made of materials like mica, aerogel, or ceramic, which are designed to rupture and allow gases to escape while blocking the spread of flames and materials to other battery cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If cell vents are provided in battery cells to discharge gases, then gas discharge function is improved, but flames and flammable materials can spread to other battery cells
Solution Approach 1:
The insulator serves as an intermediary component positioned between adjacent battery cells. It includes cell vent covering portions that cover the cell vents and are configured to rupture when gases are discharged, allowing controlled gas release while blocking the transmission of flames and flammable materials to neighboring cells. This mediator structure resolves the contradiction by enabling necessary gas discharge while preventing harmful fire spread.
Solution Approach 2:
The insulator is divided into multiple cell vent covering portions, each corresponding to a specific cell vent. These segmented portions can independently rupture and cover individual cell vents, allowing localized gas discharge control for each battery cell while maintaining isolation between adjacent cells. This segmentation enables precise management of gas discharge and fire prevention at the cell level.
2Reliability
If busbars are arranged close to battery cells for electrical connection, then electrical connectivity is improved, but risk of thermal damage from discharged gases increases
Solution Approach 1:
The insulator acts as a protective intermediary between the busbars and the battery cells' cell vents. By positioning the insulator to cover the cell vents and block discharged gases and flames, it protects the nearby busbars from thermal damage while allowing the busbars to maintain their close proximity to the battery cells for effective electrical connection.
3Object-generated harmful factors
If no vent covering is provided, then gas discharge is unobstructed, but flammable materials spread quickly to other cells
Solution Approach 1:
The insulator with cell vent covering portions serves as a mediator that allows unobstructed gas discharge while preventing fire spread. The covering portions are designed to rupture and open for gas discharge, yet they maintain a barrier that blocks flames and flammable materials from reaching adjacent battery cells, thus simultaneously achieving free gas discharge and fire safety.
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 contains and directs the discharge of gases and flammable materials, reducing the risk of fire propagation and enhancing the safety of battery modules by preventing the spread of high-temperature gases and flammable materials.
Implementation Method 1
be ruptured when gases are discharged from inside to outside of the battery cells through the plurality of cell vents
Implementation Method 2
an insulator which is fixed to the holder base and includes a plurality of cell vent covering portions configured to cover a plurality of cell vents
Data Source
AI summary
A busbar holder includes a holder base configured to support a plurality of busbars, each busbar electrically connecting a pair of adjacent battery cells among a plurality of battery cells, and an insulator which is fixed to the holder base and includes a plurality of cell vent covering portions configured to cover a plurality of cell vents provided to face a first direction in the plurality of battery cells and be ruptured when gases are discharged from inside to outside of the plurality of battery cells through the plurality of cell vents.