Integrated Current Sensing and Cutoff for Fast Overcurrent Blocking
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Solution Overview
Problem
Current battery pack safety systems, particularly in electric vehicles, face delays in blocking overcurrent due to the need for communication between current sensors and control devices like BMS, leading to potential safety hazards.
Innovation Solution
A current measurement apparatus with a resistor and a cutting unit that can block overcurrent independently, without relying on a separate control device, by using a control unit to measure current and physically cut the resistor when excessive, thereby quickly interrupting the current flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate control device (BMS) is used to block overcurrent, then the control function is distributed and reliable, but the response time is delayed due to communication between current sensor and control device
Solution Approach 1:
The patent combines the current measurement function and the current blocking function into a single integrated device. The current sensor, control unit, and cutting unit are merged into one apparatus, eliminating the need for separate control devices and communication protocols. This integration allows the device to autonomously detect overcurrent conditions and immediately block the current without any communication delay, thus resolving the contradiction between control reliability and response time.
Solution Approach 2:
The current measurement apparatus is designed to be self-sufficient by incorporating both sensing and actuation capabilities within the same device. When overcurrent is detected, the control unit automatically triggers the cutting unit to block the current without requiring external control signals. This self-service mechanism eliminates communication overhead and ensures the fastest possible response while maintaining system reliability.
2Adaptability or versatility
If communication protocol is used between current sensor and control device, then data transmission is standardized, but the blocking operation cannot be performed quickly
Solution Approach 1:
The patent extracts the communication function from the current blocking system. By removing the need for communication protocols between separate devices, the system achieves immediate response. The cutting unit is directly controlled by the control unit within the same apparatus, eliminating any data transmission steps and achieving the fastest possible blocking speed while maintaining adaptability through direct electrical control.
3Adaptability or versatility
If multiple separate components are used for current blocking, then system functionality is comprehensive, but device complexity increases
Solution Approach 1:
The patent merges multiple separate components (current sensor, control device, cutting unit) into a single integrated current measurement apparatus. This consolidation maintains comprehensive functionality while reducing device complexity by eliminating inter-component connections, mounting structures, and control wiring. The integrated design achieves both comprehensive system functionality and reduced 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
Enables rapid overcurrent blocking, reducing the risk of damage and accidents by eliminating the need for communication delays between sensors and control devices, ensuring quicker intervention in abnormal current situations.
Implementation Method 1
a control unit (500) mounted on the circuit board (400) and configured to measure a current flowing in the resistor (300) by using a voltage value between the first terminal (100) and the second terminal (200) and a resistance value of the resistor (300)
Implementation Method 2
a cutting unit (600) located above or below the resistor (300) and configured to cut the resistor (300) according to a control signal of the control unit (500)
Data Source
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AI summary
Disclosed is a current measurement apparatus configured to quickly block current. The current measurement apparatus includes a first terminal; a second terminal; a resistor interposed in a separated space between the first terminal and the second terminal; a circuit board; a control unit mounted on the circuit board and configured to measure a current flowing in the resistor by using a voltage value between the first terminal and the second terminal and a resistance value of the resistor; and a cutting unit located above or below the resistor and configured to cut the resistor according to a control signal of the control unit.