Battery Cell Thermal Insulation Layout for Runaway Containment
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Solution Overview
Problem
Existing batteries face safety issues due to thermal instability and violent failure reactions in high-energy density cells, leading to increased risks of fire and explosion through chain reactions.
Innovation Solution
The implementation of a first thermal insulation member between high-energy density and lower-energy density battery cells, along with pressure relief mechanisms and discharge channels, to delay or stop thermal transfer and release pressure, reducing the probability of chain reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high-energy density battery cells are used to improve energy storage capacity, then the energy density increases, but the thermal stability decreases and the risk of thermal runaway increases
Solution Approach 1:
The battery pack is segmented into multiple independent battery modules, each containing high-energy-density cells. Thermal insulation members are placed between modules to create physical barriers that prevent thermal runaway propagation while maintaining high energy density within each module.
Solution Approach 2:
Thermal insulation members act as intermediary elements between adjacent battery modules. These insulators (such as ceramic coatings, air gaps, or thermal barrier materials) mediate the thermal interaction, blocking heat transfer pathways that would otherwise propagate thermal runaway while allowing the high-energy-density cells to operate at optimal temperatures.
2Reliability
If thermal insulation members are added between battery modules to prevent thermal runaway propagation, then safety improves, but the device complexity increases
Solution Approach 1:
The thermal insulation members are merged with the existing battery module structure, such as integrating insulation layers into the module housing or combining insulation functions with structural support elements. This approach adds safety functionality without significantly increasing overall device complexity.
Solution Approach 2:
The thermal insulation members are designed to serve multiple functions: thermal insulation, structural support, and mechanical spacing between modules. By making the insulation components multi-functional, the patent avoids adding dedicated separate structures for each function, thereby limiting the increase in device complexity.
3Reliability
If thermal insulation members are placed between all adjacent battery modules, then thermal runaway propagation is prevented, but the manufacturing cost increases
Solution Approach 1:
Thermal insulation members are strategically placed only at specific locations where thermal runaway propagation risk is highest, such as between modules with direct thermal contact or at ends of battery packs. This localized approach provides effective thermal runaway prevention while minimizing the total amount of insulation material required, thereby controlling manufacturing costs.
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
Enhances battery safety by effectively preventing thermal transfer and timely pressure release, thereby reducing the likelihood of chain reactions and improving overall safety.
Implementation Method 1
a first thermal insulation member is disposed between the first battery cell and the second battery cell, and the first thermal insulation member can effectively delay or stop thermal transfer between the first battery cell and the second battery cell
Data Source
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AI summary
This application provides a battery, an apparatus, a preparation method of battery, and a preparation apparatus of battery, and relates to the field of battery technologies, so as to resolve the technical problem of low battery safety. The battery includes a battery, including a first battery cell, a second battery cell, and a first thermal insulation member, where 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. The apparatus in this application includes the battery. The preparation method of battery in this application includes: configuring a first battery cell; configuring a second battery cell; and configuring a first thermal insulation member. The preparation apparatus of battery in this application includes a first battery cell configuration module, a second battery cell configuration module, and a first thermal insulation member configuration module. The battery, apparatus, preparation method of battery, and preparation apparatus of battery provided in this application are used to improve use safety of the battery.