Battery Venting Structure With Heat-Resistant Plate for Safer Gas Discharge
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Solution Overview
Problem
Existing power source devices with discharge valves for secondary batteries have complex structures that increase costs and hinder downsizing, while also posing safety risks due to high-temperature gas emissions and sparks.
Innovation Solution
A power source device with a simple structure featuring a heat-resistant plate inside the outer case, incorporating energy attenuation and heat radiation gaps to safely discharge emission gas, reducing the risk of fire and sparks by attenuating kinetic and thermal energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gas cooler and spark trap are provided in the exhaust duct, then safety is improved by preventing fire generation, but device complexity increases and manufacturing cost rises
Solution Approach 1:
The patent extracts and eliminates the gas cooler and spark trap components from the exhaust duct, retaining only the essential discharge function. The exhaust duct is simplified to directly connect the battery case to the external environment without intermediate safety components, achieving structural simplification while maintaining adequate safety through proper duct design and material selection.
Solution Approach 2:
Instead of adding safety components to the exhaust duct, the patent inverts the approach by designing the duct itself to inherently handle safety requirements through its structure, material properties, and thermal management design, eliminating the need for separate safety devices.
2Reliability
If a gas cooler and spark trap are provided in the exhaust duct, then safety is improved by preventing fire generation, but manufacturing cost increases
Solution Approach 1:
The patent removes the gas cooler and spark trap components, significantly reducing part count, assembly steps, and manufacturing cost. The simplified exhaust duct can be produced as a single component or with fewer parts, enabling low-cost mass production while maintaining essential safety functions.
Solution Approach 2:
The patent employs a simple, inexpensive exhaust duct design that can be manufactured using cost-effective materials and processes, suitable for mass production in consumer electronics applications where cost sensitivity is high.
3Reliability
If a gas cooler and spark trap are provided in the exhaust duct, then safety is improved by preventing fire generation, but the space required increases making downsizing difficult
Solution Approach 1:
By removing the gas cooler and spark trap components, the patent eliminates the space they would occupy within the battery assembly. The simplified exhaust duct requires minimal volume, enabling compact battery designs and facilitating device downsizing while maintaining adequate safety margins.
4Reliability
If connecting pipe portions come into close contact with discharge valves by highly heat resistant adhesive, then emission gas flow without leak is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent integrates the connecting pipe portions and discharge valve assembly into a unified structure where the exhaust duct directly interfaces with the battery case opening. This merging eliminates the need for separate connecting pipes and heat-resistant adhesives, simplifying the manufacturing process while ensuring reliable gas-tight sealing through direct contact and structural integration.
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 device achieves high safety and low-cost mass production by efficiently attenuating the energy of high-temperature emission gas, preventing fire generation, and simplifying the structure to reduce manufacturing costs.
Implementation Method 1
provided with, along an outer peripheral edge, an energy attenuation gap 6 between the heat-resistant plate itself and an inner surface of the outer case
Implementation Method 2
provided with planar heat radiation gap 7 between the heat-resistant plate itself and an inner surface of the exhaust surface
Implementation Method 3
heat-resistant plate 5 that is a part outer case 2 and is composed by being disposed in a facing attitude in an inside of exhaust surface 25
Data Source
AI summary
A power source device includes: a plurality of batteries each including a discharge valve that opens when an internal pressure becomes higher than a set pressure and jets emission gas; outer case that houses these batteries and is composed by providing discharge opening that discharges, to an outside, the emission gas from the discharge valve; and heat-resistant plate that is a part of outer case and is composed by being disposed in a facing attitude in an inside of exhaust surface (25) composed by providing discharge opening, wherein heat-resistant plate is: provided with, along an outer peripheral edge, energy attenuation gap between the heat-resistant plate itself and an inner surface of the outer case; provided with planar heat radiation gap between the heat-resistant plate itself and an inner surface of the exhaust surface; and composed to cause the emission gas jetted from the discharge valves to pass through energy attenuation gap and heat radiation gap, and to be discharged from discharge opening to an outside.