Semiconductor Device for Battery Cell Voltage Equalization
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Solution Overview
Problem
The existing semiconductor device technology for battery cell voltage equalization requires high-voltage resistant elements, leading to increased size and cost of IC chips due to the need for group voltage detection circuits, which is not suitable for the miniaturization of integrated circuits.
Innovation Solution
A semiconductor device with a serial resistance element section and a comparison section that compares voltages at connection points of battery cells to corresponding resistance elements, allowing for selective discharge of battery cells to maintain optimal voltage levels without measuring the total voltage, thereby using low-voltage resistant elements and preventing size and cost increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a group voltage detection circuit is used to measure total voltage of battery cells connected in series, then cell voltage equalization can be achieved, but high voltage resistant elements are required which increase the size and cost of the IC chip
Solution Approach 1:
The patent segments the voltage detection function by introducing individual resistance elements corresponding to each battery cell, rather than using a single group voltage detection circuit. This allows the system to measure and control each cell's voltage independently using low-voltage resistant elements, thereby reducing IC chip size while maintaining equalization reliability
Solution Approach 2:
The patent introduces resistance elements as intermediary components between the battery cells and the detection circuit. These resistance elements enable voltage division and measurement without requiring the detection circuit to directly handle high voltages, thus allowing the use of low-voltage resistant elements and reducing IC chip size
2Reliability
If a group voltage detection circuit is used to measure total voltage of battery cells connected in series, then cell voltage equalization can be achieved, but high voltage resistant elements are required which increase the cost of the IC chip
Solution Approach 1:
The patent segments the voltage detection function by introducing individual resistance elements corresponding to each battery cell, rather than using a single group voltage detection circuit. This allows the system to measure and control each cell's voltage independently using low-voltage resistant elements, thereby reducing IC chip size while maintaining equalization reliability
Solution Approach 2:
The patent replaces expensive high-voltage resistant elements with cheaper low-voltage resistant elements by using resistance elements as intermediary components. This substitution reduces material costs and manufacturing expenses while achieving the same functional goal of cell voltage equalization
3Measurement precision
If high voltage resistant elements are used in the semiconductor element, then group voltage detection can be performed, but the size of the IC chip increases
Solution Approach 1:
The patent introduces resistance elements as intermediary components between the battery cells and the detection circuit. These resistance elements enable voltage division and measurement without requiring the detection circuit to directly handle high voltages, thus allowing the use of low-voltage resistant elements and reducing IC chip size
Solution Approach 2:
The patent changes the voltage parameter handled by the detection circuit by using resistance elements to divide and reduce the voltage level. This transformation allows the detection circuit to operate with low-voltage resistant elements, thereby reducing IC chip size while maintaining measurement capability
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
This approach allows for stable voltage measurement and equalization of battery cells without increasing the size or cost of IC chips, enabling miniaturization and reducing the complexity of the IC chip design.
Implementation Method 1
a voltage of a connection point between the resistance elements that correspond to the battery cells
Implementation Method 2
a comparison section that compares a voltage of a connection point of the plural battery cells connected in series to a voltage of a connection point between the resistance elements
Implementation Method 3
discharging, based on a result of comparing, a battery cell that satisfies a condition
Data Source
AI summary
A semiconductor device includes a serial resistance element section including plural resistance elements connected in series, each resistance element provided so as to correspond to one of a plural battery cells connected in series; a comparison section that compares a voltage of a connection point of the plural battery cells connected in series to a voltage of a connection point between the resistance elements that correspond to the battery cells; and a measurement section that measures a voltage of one of the plural battery cells.