Charging Temperature Protection Circuit With Dual Cutoff Paths
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing charging devices rely on single-mode temperature control protection, which poses a safety risk due to excessive temperature, potentially leading to component damage or fire, and results in degraded user experience with incomplete charging.
Innovation Solution
A temperature control protection device with a temperature acquisition unit, comparison unit, control unit, driving unit, and switch unit, utilizing a hysteresis comparator and triode driving unit to monitor and regulate temperature, ensuring safe operation by cutting off charging current when thresholds are exceeded, and adjusting power to prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-mode temperature control protection device is used, then the device complexity is reduced, but the reliability of temperature control protection deteriorates
Solution Approach 1:
The temperature control protection device is segmented into two independent parallel protection paths: a first protection path using a comparison unit with hysteresis comparator, and a second protection path using a control unit with threshold comparator. This segmentation allows each path to operate independently, so that if one path fails, the other can still provide protection, thereby improving reliability without significantly increasing overall system complexity.
Solution Approach 2:
The patent implements redundant protection mechanisms in advance by providing both a first protection path and a second protection path before any temperature failure occurs. The hysteresis comparator in the first path and the threshold comparator in the second path are both activated beforehand, creating a cushioning effect where multiple layers of protection are ready to catch any single point of failure.
2Reliability
If the charging current is cut off when temperature exceeds threshold, then the safety of charging device is improved, but the productivity of charging deteriorates
Solution Approach 1:
The control unit dynamically adjusts the charging current based on real-time temperature monitoring. When the temperature exceeds the first threshold, the control unit reduces or stops the charging current to prevent overheating. When the temperature drops below the threshold, charging resumes. This dynamic adjustment ensures safety while minimizing interruptions to charging productivity.
Solution Approach 2:
The patent implements a feedback mechanism where the temperature sensor continuously monitors the charging device temperature and feeds this information back to the control unit. The control unit then adjusts the charging current accordingly, creating a closed-loop control system that maintains safety while optimizing charging efficiency by resuming charging as soon as safe conditions are restored.
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 charging safety by preventing component aging and fires, stabilizing the system, reducing implementation costs, and improving user experience by maintaining efficient charging within safe temperature ranges.
Implementation Method 1
Through the hysteresis comparator, it is possible to avoid the instability of the charging device caused by the frequent switching of the switch unit when the temperature is close to the temperature threshold.
Implementation Method 2
In the prior art, the temperature of the charging device is detected by a temperature-sensitive resistor to determine whether the temperature exceeds a preset temperature threshold.
Data Source
AI summary
A temperature control protection device and a corresponding charging device. The temperature control protection device includes: a temperature acquisition unit (101); a comparison unit (102) configured to compare an environment temperature signal with a preset reference voltage and output a first comparison result; a control unit (103) configured to compare the environment temperature signal with a preset threshold and output a second comparison result; a driving unit (104) configured to output a driving signal to a switch unit (105) according to the first comparison result or the second comparison result for switching on or off the switch unit (105); and the switch unit (105) configured to output charging current when being conducted. The temperature control protection device and the charging device with it according to the embodiments of the present disclosure realize the multiple protections of temperature monitoring during charging, and improve the charging safety.