Fireproof Busbar Separation in Battery Packs to Prevent Short Circuits
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Solution Overview
Problem
Existing battery packs are prone to thermal runaway due to short circuits caused by fires, which can occur when a busbar or wire is compromised during a fire, necessitating a solution to prevent such events.
Innovation Solution
Incorporation of fireproof members, such as mica, gel, or tape, between busbars and battery modules, as well as between wires and support structures, to physically separate and insulate these components, thereby preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fireproof members are added to prevent short circuits, then safety and reliability are improved, but device complexity increases
Solution Approach 1:
The patent introduces fireproof members as intermediary components positioned between the busbar and battery modules. These members act as a protective barrier that prevents direct contact between electrical components during fire conditions, thereby eliminating the short circuit risk without fundamentally altering the core battery system architecture.
Solution Approach 2:
The fireproof members are pre-installed in critical locations before any fire incident can occur. This preliminary protective measure ensures that when a fire does happen, the electrical isolation is already in place, preventing the thermal runaway chain reaction before it can initiate.
2Reliability
If fireproof members are disposed between busbar and battery modules, then thermal runaway prevention is improved, but manufacturing complexity increases
Solution Approach 1:
Rather than providing uniform protection throughout the entire battery pack, the fireproof members are strategically positioned only at critical locations where busbars are in close proximity to battery modules. This localized approach provides maximum thermal runaway prevention where it is most needed while minimizing the overall number of components and assembly steps.
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 implementation of fireproof members effectively prevents short circuits and thermal runaway, enhancing the safety and reliability of battery packs by maintaining electrical isolation during fires.
Implementation Method 1
a fireproof member that is disposed between the busbar and the battery modules and that extends to cover the busbar
Data Source
AI summary
An embodiment battery pack includes a battery housing defining a receiving space, a plurality of battery modules accommodated in the receiving space, each battery module comprising a battery cell, a busbar electrically connected to the battery cell and disposed on a first side of the battery modules, and a fireproof member disposed between the busbar and the battery modules, the fireproof member extending to cover the busbar.