Heat-Resistant Battery Pack Containing Member for Thermal Runaway Prevention
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Solution Overview
Problem
Current battery packs face safety concerns due to increased heat generation from higher energy density secondary batteries, leading to potential thermal runaway and fire spreading, which existing safety measures have not adequately addressed.
Innovation Solution
Incorporating a ceramic material or polymer with a heat resistance temperature of 300°C or higher in the containing and protective members, and using a hydrate-containing material as a fire-extinguishing agent to prevent heat transfer and extinguish fires, thereby reducing the risk of thermal runaway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the energy density of secondary batteries is increased to achieve higher performance, then the power and energy capacity are improved, but the heat generation increases leading to safety issues
Solution Approach 1:
A protective member made of heat-resistant material (ceramic or polymer with heat resistance temperature of 300°C or higher) is introduced as an intermediary between the secondary batteries and the external environment. This protective member acts as a thermal barrier that prevents heat generated by the high-energy-density batteries from spreading to surrounding components, thus resolving the contradiction between achieving high power and preventing harmful heat effects.
2Reliability
If conventional safety measures are used in battery packs, then some level of protection is provided, but the safety is not sufficient to prevent fire spreading
Solution Approach 1:
The patent changes the thermal parameter of the protective member by using materials with extremely high heat resistance temperatures (300°C or higher). This parameter change enables the protective member to withstand and resist fire conditions that would normally compromise conventional safety materials, thus preventing fire spreading and achieving sufficient safety levels.
Solution Approach 2:
The protective member is constructed using composite materials that combine ceramic materials or high-heat-resistant polymer materials. These composite materials provide superior thermal stability and fire resistance compared to conventional single materials, enabling the battery pack to achieve adequate safety against fire spreading.
3Object-affected harmful factors
If heat-resistant materials with temperature of 300°C or higher are used in containing and protective members, then the resistance to heat and fire is improved, but the device complexity increases
Solution Approach 1:
The protective member is designed to serve multiple functions simultaneously: it provides mechanical protection for the secondary batteries, acts as a thermal barrier against heat generation, and serves as a fire-resistant shield. By consolidating these multiple functions into a single component made of heat-resistant material, the patent achieves high heat resistance without proportionally increasing 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
The solution effectively reduces the likelihood of fire spreading among secondary batteries, enhancing safety by preventing overheating and extinguishing fires, thus improving the overall safety of battery packs.
Implementation Method 1
the protective member includes a hydrate-containing material
Data Source
AI summary
Provided herein is a battery pack including a plurality of secondary batteries, a containing member, a protective member, and a wiring member. The plurality of secondary batteries include a plurality of terminals at each secondary battery. The containing member contains the plurality secondary batteries to expose the plurality of terminals. The protective member includes a plurality of openings, and the plurality of secondary batteries contained in the containing member are covered with the protective member to expose the plurality of terminals from the plurality of openings. The wiring member is coupled to the plurality of terminals exposed from the plurality of openings. One or both of the containing member and the protective member include one or both of a ceramic material and a polymer material having a heat resistance temperature of 300° C. or higher.