Battery Pack Isolation Structure for Thermal Runaway Suppression
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Solution Overview
Problem
Current battery packs lack sufficient safety measures to prevent thermal runaway and excessive temperature rises, which can lead to damage and safety hazards.
Innovation Solution
A battery pack design incorporating an isolating member with a heat absorbing agent housed inside, featuring a housing portion and a heat conduction part with higher thermal conductivity than the housing portion, to isolate and cool individual batteries, thereby preventing heat accumulation and excessive temperature rises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat absorbing member is placed in contact with the battery unit, then heat absorption capability is improved, but the structural complexity increases
Solution Approach 1:
The patent combines the isolating member and heat absorbing member into a single integrated component. The isolating member includes a housing portion that houses the heat absorbing agent, eliminating the need for separate heat absorption structures and reducing overall device complexity while maintaining both isolation and heat absorption functions.
Solution Approach 2:
The isolating member serves multiple functions simultaneously: it provides electrical isolation between adjacent battery units and contains the heat absorbing agent for thermal management. This multi-functional design reduces the number of components needed while achieving both safety isolation and heat absorption objectives.
2Reliability
If thermal insulation is enhanced to isolate batteries, then safety is improved, but heat dissipation efficiency deteriorates
Solution Approach 1:
The patent applies different thermal conductivity properties to different parts of the isolating member. The housing portion has lower thermal conductivity for insulation, while the heat conduction part has higher thermal conductivity for efficient heat transfer to the heat absorbing agent. This localized differentiation allows simultaneous achievement of safety isolation and heat dissipation efficiency.
Solution Approach 2:
The heat conduction part acts as an intermediary component between the battery unit and the heat absorbing agent. It efficiently transfers heat from the battery to the heat absorbing agent, overcoming the thermal insulation barrier while maintaining safety isolation, thus mediating between the conflicting requirements of insulation and heat dissipation.
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 design effectively suppresses excessive exothermic reactions and temperature rises, enhancing safety by isolating batteries and efficiently dissipating heat, thus preventing thermal runaway and ensuring safer operation.
Implementation Method 1
a heat conduction part that is arranged between the housing portion and each of the plurality of batteries and has a thermal conductivity higher than a thermal conductivity of the housing portion
Implementation Method 2
a heat absorbing agent that is housed inside the isolating member and cools the plurality of batteries
Data Source
AI summary
A battery pack includes a plurality of batteries, an isolating member that is arranged among the plurality of batteries and isolates the plurality of batteries from each other, and a heat absorbing agent that is housed inside the isolating member and cools the plurality of batteries. The isolating member includes a housing portion that is arranged among the plurality of batteries and houses a heat absorbing agent inside, and a heat conduction part that is arranged between the housing portion and each of the plurality of batteries and has a thermal conductivity higher than a thermal conductivity of the housing portion.