Battery Management System Using Analog Voltage Detection
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Solution Overview
Problem
Conventional battery management systems for electric vehicles are cost-ineffective and vulnerable to environmental conditions like electromagnetic interference, particularly due to complex data transmission methods that can lead to reliability issues over time.
Innovation Solution
A battery management system that replaces data transmission through communication protocols with analog voltage detection using switching devices like latch relays, isolating signal detection to a high-power circuit loop, thereby simplifying maintenance and enhancing durability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data transmission through communication protocols (CAN bus, RS485) is used for battery monitoring and control, then monitoring and control functionality is achieved, but the system becomes vulnerable to electromagnetic interference and reliability deteriorates over time
Solution Approach 1:
The patent replaces electronic communication protocols (CAN bus, RS485) with a mechanical/electrical switching system. Switching devices connected in series to the high-power circuit loop physically open or close based on detection device signals, eliminating the need for vulnerable data transmission through communication protocols while maintaining monitoring and control functionality.
Solution Approach 2:
The patent introduces switching devices as intermediaries between the detection devices and the control system. These switching devices convert detection signals into physical circuit state changes (open/closed), serving as a mediator that translates battery status information into a form that can be detected by monitoring the high-power circuit loop without requiring vulnerable data transmission.
2Measurement precision
If complex data transmission protocols are implemented for battery management, then monitoring capability is improved, but system cost increases and complexity increases
Solution Approach 1:
The patent replaces complex electronic communication protocols with a simple series switching mechanism. Instead of implementing sophisticated data transmission through CAN bus or RS485, the system uses switching devices that simply open or close based on detection signals, dramatically reducing system complexity while maintaining monitoring precision.
Solution Approach 2:
The patent extracts and removes the complex data transmission layer (CAN bus, RS485 protocols) from the battery management system. By eliminating this intermediate communication layer and directly coupling detection devices to switching devices through the high-power circuit loop, the system achieves simplified architecture while preserving essential monitoring capabilities.
3Ease of operation
If multiple communication interfaces (CAN bus, RS485) are used for master-slave level control, then control functionality is achieved, but the system becomes cost-ineffective and maintenance becomes complicated
Solution Approach 1:
The patent merges the control functionality into a single unified system that operates directly through the high-power circuit loop. Instead of maintaining separate master-slave control levels with multiple communication interfaces, the detection devices and switching devices work together in a integrated manner, eliminating the need for separate communication infrastructure and reducing manufacturing costs.
Solution Approach 2:
The high-power circuit loop serves multiple functions simultaneously: it provides power transmission to the motor and battery, and also serves as the signaling medium for monitoring and control. This multi-functionality eliminates the need for dedicated communication interfaces, simplifying the system and reducing costs while maintaining full control functionality.
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
The solution results in a cost-effective, reliable, and durable battery management system that is less prone to noise interference, offering a plug-and-play architecture and improved service life.
Implementation Method 1
a first switching device connected to, and operably switched by, a first detection device associated with a battery module to cause a voltage difference responsive to detection of an event corresponding to operation of the battery module
Data Source
AI summary
In one embodiment, a battery management system comprising a first circuit comprising a first plurality of circuit elements arranged in series, the first plurality of circuit elements comprising: a direct current (DC) voltage source, and first plural switching devices, each of the first plural switching devices connected to, and operably switched by, a first detection device associated with a battery module to cause a voltage difference responsive to detection of an event corresponding to operation of the battery module.