Fluid heating device for electric vehicle
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Solution Overview
Problem
Conventional fluid heating devices for electric vehicle batteries can overheat when insufficient fluid flow occurs, leading to rapid internal temperature increases and potential device failure, which deteriorates battery performance.
Innovation Solution
A fluid heating device with an overheating prevention unit positioned close to the heater, which includes a plate with a support member, connecting member, and mounting member to block power to the heater when a preset temperature is reached, preventing overheating by minimizing fluid influence and using ceramic materials for the tube members to break and stop heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the heater is positioned to efficiently heat the fluid, then heating effectiveness is improved, but the risk of overheating increases when fluid flow is insufficient
Solution Approach 1:
An overheating prevention unit is introduced as an intermediary component between the power supply and the heater. This unit includes a thermal cut-off mechanism that automatically interrupts power supply when the heater reaches a predetermined temperature, preventing overheating while allowing efficient heating operation under normal conditions
Solution Approach 2:
The heating system incorporates a feedback mechanism through the overheating prevention unit that continuously monitors the heater temperature and automatically adjusts power supply accordingly. When temperature exceeds the safety threshold, the system feedbacks by cutting off power, creating a self-regulating safety mechanism
2Device complexity
If the overheating prevention unit is positioned far from the heater, then device complexity is reduced, but temperature measurement accuracy deteriorates
Solution Approach 1:
The overheating prevention unit is positioned in close proximity to the heater, creating a localized temperature monitoring zone. This local placement ensures accurate detection of the heater's actual temperature at the heat generation point, enabling precise temperature control and timely overheating prevention
3Measurement precision
If a plate structure is added to position the overheating prevention unit closer to the heater, then temperature monitoring accuracy is improved, but device complexity increases
Solution Approach 1:
The plate structure serves multiple functions simultaneously: it acts as a mounting support for the overheating prevention unit, provides thermal isolation between the heater and housing, and maintains the positional relationship of components. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in overall 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
Prevents overheating and ensures the stability of the heating device by cutting off power to the heater when excessive temperatures are detected, thereby maintaining battery performance and preventing device defects.
Implementation Method 1
a heating member provided between the first tube and the second tube to generate heat
Implementation Method 2
blocking power provided to the heater when heat applied from the heater reaches a preset range
Data Source
AI summary
The fluid heating device comprises: a housing forming a first space in which a fluid is introduced and heated, and a second space separated from the first space by a partition wall formed therein; a heater that extends from an outside of the housing into the first space to form a path through which the fluid flows into the first space and heats the fluid; a plate provided on the partition wall between the first space and the second space to be close to the heater; and an overheating prevention unit provided on a side of the plate facing the second space and blocking power provided to the heater when heat applied from the heater reaches a preset range.