Voltage Detection Device Circuit Reduction
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Solution Overview
Problem
Conventional voltage detection devices for secondary batteries require extensive circuits and insulating devices to transmit multiple signals, leading to increased costs due to the need for 3N circuits and insulating devices when N voltage-detecting ICs are used, which is costly and inefficient.
Innovation Solution
A voltage detection device with a plurality of voltage detectors in the high-voltage region and an interruption control unit in the low-voltage region, where all voltage detectors are reset by a trigger signal, and only the designated detector performs an interruption operation, reducing the need for separate chip selection, reset, and interruption circuits to a single trigger signal line, and data communication lines are connected in a daisy chain fashion to minimize insulating devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate circuits are provided for chip selection, reset, and interruption signals to each voltage-detecting IC, then reliable control of each detector is achieved, but the number of circuits and insulating devices increases to 3N, significantly increasing cost
Solution Approach 1:
The patent combines three separate control signal lines (chip selection, reset, and interruption) into a single shared line. By encoding control information in the timing and sequence of signals on this single line, the system achieves the same control functionality with fewer physical circuits and insulating devices, directly reducing the 3N complexity while maintaining reliability through systematic signal management
2Reliability
If 3N pieces of insulating devices are used to connect voltage-detecting ICs in the high-voltage region to the main microcomputer in the low-voltage region, then electrical insulation is ensured, but the cost increases significantly
Solution Approach 1:
The patent merges multiple insulating device requirements into a single insulation barrier. By consolidating three separate signal lines into one shared line, the system requires only one insulating device to maintain electrical isolation between high-voltage and low-voltage regions, rather than requiring three insulating devices per voltage-detecting IC, thereby significantly reducing the total number of insulating devices from 3N to a much smaller number while preserving electrical safety
3Ease of operation
If individual control circuits are provided for each voltage-detecting IC, then precise control of each detector is achieved, but the overall system cost increases due to the large number of required circuits
Solution Approach 1:
The patent makes a single control line universal by enabling it to perform multiple functions: chip selection, reset, and interruption control. By encoding different control operations in the timing and sequence of signals on this single line, the system achieves precise control of individual voltage-detecting ICs without requiring separate dedicated circuits for each function, thereby reducing system cost while maintaining control precision through intelligent signal encoding and timing
Data Source
AI summary
A voltage detection device includes: a plurality of voltage-detecting ICs installed in order to detect voltages of a plurality of blocks of a secondary battery, each of the voltage-detecting ICs being installed for each of the blocks; and an interruption control unit that controls interruption operations of the voltage-detecting ICs. After resetting all of the voltage-detecting ICs by transmitting a trigger signal to all of the voltage detecting ICs, the interruption control unit transmits a control signal in which an address of a voltage-detecting IC allowed to execute an interruption operation is designated. Each of the voltage-detecting ICs receives the control signal within a designated time set in advance, executes the interruption operation when an address of its own is designated, and is left reset when the address of its own is not designated.