Battery Cell Thermal Insulation Layout to Contain Chain Reactions
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Solution Overview
Problem
Existing battery technologies face safety issues due to thermal instability, where high-energy density battery cells can trigger violent thermal failure reactions, leading to chain reactions and increased risks of fire and explosion, compromising the safety of the battery.
Innovation Solution
The implementation of a battery design that includes a first battery cell with higher energy density and a second battery cell with lower energy density, separated by a thermal insulation member, which delays or stops thermal transfer between the cells, reducing the probability of chain reactions and enhancing safety through pressure relief mechanisms and discharge channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high energy density battery cells are used to improve battery capacity, then the battery capacity increases, but the thermal stability decreases and the risk of violent thermal failure and chain reactions increases
Solution Approach 1:
The battery pack is divided into multiple battery modules, and each module is further divided into multiple battery cells. Thermal insulation members are placed between adjacent battery cells to segment the thermal pathways, preventing heat from one cell from rapidly propagating to neighboring cells, thus addressing the thermal stability issue while maintaining high capacity
Solution Approach 2:
Thermal insulation members are introduced as intermediary elements between adjacent battery cells. These members act as thermal barriers that delay or stop heat transfer, serving as a mediator that protects high energy density cells from triggering chain reactions in neighboring cells
2Reliability
If thermal insulation members are added between battery cells to prevent chain reactions, then safety improves, but the device complexity increases
Solution Approach 1:
The thermal insulation members are designed to perform multiple functions: they provide thermal insulation to prevent chain reactions, serve as mechanical spacers to maintain proper cell spacing, and can be integrated with the module housing structure. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device 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
This design effectively reduces the likelihood of chain reactions and improves overall safety by managing thermal transfer and pressure release, thereby enhancing the safety and reliability of the battery.
Implementation Method 1
a first thermal insulation member, disposed between the first battery cell and the second battery cell
Data Source
AI summary
This application provides a battery, an apparatus, a preparation method of battery, and a preparation apparatus of battery. The battery includes a first battery cell, a second battery cell, and a first thermal insulation member. The second battery cell is disposed adjacent to the first battery cell, an energy density of the second battery cell is less than that of the first battery cell, and the first thermal insulation member is disposed between the first battery cell and the second battery cell.