Battery Connection Terminal with Fusing Unit for Thermal Management
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Solution Overview
Problem
Power storage devices face safety challenges due to the risk of short-circuits and thermal management issues, which existing technologies have not adequately addressed.
Innovation Solution
A power storage device design featuring battery lines arranged in parallel with a connection terminal unit that includes a fusing unit with specific electrical and thermal resistance properties, and a configuration that allows for efficient heat dissipation and current interception during abnormal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If battery cells are connected in parallel to increase current capacity, then power output is improved, but the risk of short-circuit and thermal runaway increases
Solution Approach 1:
The connection terminal unit is divided into multiple independent connection regions, each serving separate battery cell groups. This segmentation isolates potential short-circuit paths, so that a failure in one region does not propagate to other regions, thereby maintaining system reliability while supporting high current capacity through parallel connections.
Solution Approach 2:
The connection terminal unit acts as an intermediary component between battery cells, incorporating designed resistance and thermal management features. This intermediary structure controls current distribution and dissipates heat, preventing direct thermal runaway propagation while maintaining efficient power transmission.
2Loss of energy
If connection terminal unit has high electrical conductivity to reduce resistance loss, then energy efficiency is improved, but heat dissipation becomes more difficult
Solution Approach 1:
Different regions of the connection terminal unit have different material properties or structural characteristics. Regions with higher current density incorporate materials or structures optimized for low resistance, while regions with higher thermal load incorporate features enhanced for heat dissipation, allowing simultaneous optimization of both electrical conductivity and thermal management.
Solution Approach 2:
The connection terminal unit incorporates three-dimensional heat dissipation structures such as heat sinks or cooling channels that extend in directions perpendicular to the current flow path. This adds thermal management capability in additional dimensions without interfering with the electrical conductivity optimized for current flow.
3Quantity of substance
If battery lines are arranged in parallel to increase power storage capacity, then energy capacity is improved, but thermal management complexity increases
Solution Approach 1:
Multiple battery lines are thermally managed through a unified thermal management system that integrates heat dissipation pathways across all parallel-connected battery lines. This merging approach consolidates thermal management components and control logic, reducing overall system complexity while supporting increased energy capacity through parallel configuration.
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 safety by effectively managing short-circuit currents and thermal stress, ensuring reliable operation and preventing damage from overheating.
Implementation Method 1
a fusing unit to be fused to intercept a current
Implementation Method 2
a fusing unit to be fused to intercept a current
Implementation Method 3
Rθ is a thermal resistance in degrees Kelvin per Watts of the fusing unit and Rθ=(1/λ)×(L/S), λ is a thermal conductivity in Watts per meters of a heat transfer unit in the connection terminal unit
Data Source
AI summary
There is provided a power storage system comprising a plurality of battery lines and a connection terminal unit. Each battery line comprises a plurality of battery cells arranged in a first direction. The connection terminal unit is electrically connected to terminal faces of each battery cell of a group of the battery cells, and the group of the battery cells is disposed in a second direction. At least one cut out is formed in the connection terminal unit. There are also provided a power storage system for a house, a power storage system for a vehicle, an electronic device and an electric vehicle including the power storage device. There is also provided a connection terminal unit for electrically connecting a plurality of battery cells, in which at least one cut out is formed in the connection terminal unit.