Battery Unit Heat Dissipation Layout for Thermal Runaway Suppression
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Solution Overview
Problem
Power storage devices in electrified vehicles experience temperature variations and thermal runaway due to localized heat generation in storage battery units, which existing heat dissipating plates fail to adequately address by only transferring heat between adjacent units, leading to uneven temperature distribution.
Innovation Solution
A power storage device configuration with a heat dissipating material that includes a first portion between adjacent storage battery units and a second portion that transfers heat to a wider range of units, effectively distributing heat generated in one unit to multiple adjacent units, thereby suppressing local temperature rises and reducing thermal runaway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat dissipating plate is provided between adjacent storage battery units, then heat is discharged from the storage battery units, but local temperature rise is not suppressed and temperature variation among units increases
Solution Approach 1:
The heat dissipating material is divided into multiple portions (first portion between adjacent units, second portion extending to other units) to create separate heat transmission pathways. This segmentation allows heat to be distributed to multiple target units simultaneously, preventing localized heat accumulation and reducing temperature variations among storage battery units.
Solution Approach 2:
The heat dissipating material extends in multiple spatial directions beyond the conventional single-direction heat dissipation. By adding the second portion that transmits heat to other storage battery units beyond adjacent ones, the system transitions from one-dimensional heat transfer to multi-dimensional heat distribution, thereby suppressing local temperature rises more effectively.
2Reliability
If heat is transmitted only to adjacent storage battery units, then heat dissipation is simple, but temperature distribution remains uneven and thermal runaway risk persists
Solution Approach 1:
The heat dissipating material performs multiple functions: the first portion dissipates heat between adjacent storage battery units, while the second portion extends heat transmission to other non-adjacent units. This multi-functional design allows a single component to address both local and distributed heat management needs, improving reliability without proportionally increasing complexity.
Solution Approach 2:
The heat dissipating material acts as an intermediary that facilitates heat transfer between storage battery units. By introducing this intermediate heat transmission medium with extended portions, heat is redistributed more uniformly across the battery pack, preventing thermal runaway while maintaining structural simplicity through a single integrated component.
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 configuration reduces temperature variations among storage battery units, minimizing the risk of thermal runaway by uniformly distributing heat across a wider range of units, as demonstrated by a reduction in maximum temperature from 200°C to 150°C or less.
Implementation Method 1
a first portion disposed between the first storage battery unit and the second storage battery unit, and a second portion that transmits heat between the first storage battery unit and another one of the storage battery units than the second storage battery unit
Data Source
AI summary
The power storage device includes a plurality of storage battery units stacked in a predetermined direction, and a heat dissipating material for dissipating heat generated in the storage battery unit. The plurality of storage battery units includes a storage battery unit and a storage battery unit disposed at a position adjacent to the storage battery unit along a predetermined direction. The heat dissipating material includes a first flat plate portion disposed between the storage battery unit and the storage battery unit, and a second flat plate portion that transmits heat between the storage battery unit and a storage battery unit different from the storage battery unit and the storage battery unit.