Battery Module Flame Retardant Insulation Film
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Solution Overview
Problem
Secondary battery modules are prone to explosions or fires due to short circuits caused by external damage, leading to overheating.
Innovation Solution
A battery module design that incorporates a flame retardant filled within the module case, which permeates into damaged areas to form an insulation film, preventing short circuits and subsequent fires or explosions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the battery module uses secondary batteries connected in series or parallel to increase voltage or capacity, then the power output is improved, but the risk of short circuit and fire increases when damaged by external impact
Solution Approach 1:
The patent introduces flame retardant as an intermediary substance between the battery cells and the external environment. When damage occurs, this flame retardant permeates into the damaged portion to form an insulation film, acting as a mediator that prevents direct contact between electrodes and thus prevents short circuits while allowing the battery module to maintain high voltage or capacity configurations
Solution Approach 2:
The flame retardant is pre-filled in the module case before any damage occurs. This preliminary placement ensures that when damage happens, the flame retardant is already in position to immediately permeate and form an insulation film, preventing short circuits before they can propagate through the series or parallel connected battery cells
2Strength
If the battery module is damaged by external impact, then the structural integrity deteriorates, but high current flows instantly causing overheating and fire
Solution Approach 1:
The patent converts the harmful effect of damage (exposed electrodes) into a beneficial outcome by having the flame retardant permeate into the damaged portion. The damage creates a pathway for the flame retardant to reach and coat the exposed electrodes, forming an insulation film that prevents the high current flow and overheating that would otherwise result from the structural compromise
3Device complexity
If no insulation protection is provided in the module case, then the device complexity is reduced, but explosion or fire occurs when battery cells are damaged
Solution Approach 1:
The flame retardant is designed to automatically permeate into damaged portions and form an insulation film without requiring external intervention or complex control systems. This self-service mechanism provides safety protection while maintaining simple module case structure, as the flame retardant activates autonomously when damage occurs
Solution Approach 2:
The patent changes the physical state and distribution parameters of the flame retardant based on damage conditions. When damage occurs, the flame retardant transitions from a static filled state to an active permeation state, changing its distribution parameters to concentrate at the damaged portion and form an insulation film where it is most needed
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 prevents explosions and fires by forming an insulation film at the site of damage, enhancing the durability and safety of the battery module through the non-conductive and cooling properties of the flame retardant.
Implementation Method 1
the flame retardant 130 permeates into the damaged portion to form an insulation film
Implementation Method 2
the flame retardant 130 permeates into the damaged portion to form an insulation film... through the non-conductive and cooling properties of the flame retardant
Data Source
AI summary
The present invention relates to a battery module. The battery module includes a battery cell, a module case in which the battery cell is built, and a flame retardant filled in the module case. Thus, when the battery module is damaged, an insulation film is formed on the damaged portion to prevent fire or explosion from occurring.