Integrated Battery Control System for Vehicle Power Management
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Solution Overview
Problem
Current battery management systems for lithium-ion batteries in vehicles face challenges in monitoring state of charge accurately due to non-linear discharge profiles, leading to potential damage from undercharging or overcharging, and require complex arrangements for connecting components to ensure proper charging and operation.
Innovation Solution
An integrated battery control system that combines a battery management system and a power control system within a single control enclosure, featuring a computing device, battery unit monitoring modules, and sensors to monitor voltage, temperature, and current, with safety features to prevent damage by disabling power delivery when batteries reach critical thresholds or are improperly charged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate battery charger is used with lithium-ion batteries, then the batteries can be charged, but the system becomes complex and safety risks increase from improper connection and user forgetfulness
Solution Approach 1:
The patent combines the battery management system and power control system into a single integrated control unit. The power control system directly monitors battery voltage and controls power delivery, eliminating the need for separate external chargers and reducing system complexity while improving safety through unified control.
Solution Approach 2:
The integrated power control system automatically monitors battery state and controls charging/discharging operations without requiring external management. The system self-regulates power delivery based on real-time battery voltage monitoring, eliminating the need for users to manually manage charging processes and reducing safety risks from user forgetfulness.
2Measurement precision
If battery voltage is monitored simply by measuring voltage, then the monitoring is simple, but the state of charge cannot be accurately determined due to non-linear discharge profiles
Solution Approach 1:
The power control system continuously monitors battery voltage and uses this feedback to dynamically adjust power delivery control. The system compares real-time voltage measurements against predetermined thresholds and adjusts charging/discharging operations accordingly, enabling accurate state of charge determination through continuous feedback loops rather than simple static measurements.
3Power
If multiple lithium batteries are connected in series to generate required voltage, then the voltage requirement is met, but the system complexity increases and charge balancing becomes difficult
Solution Approach 1:
The integrated power control system serves multiple functions simultaneously: it monitors all batteries in series, controls power delivery to maintain proper voltage levels, and prevents overcharging/over-discharging of individual cells. This multi-functional approach simplifies the overall system by using a single control unit to manage the entire battery pack rather than requiring separate control circuits for each battery.
4Ease of operation
If the battery management system reserves addresses for each battery unit sensor, then communication is organized, but the system requires significant resources and complex arrangements
Solution Approach 1:
The patent extracts the complex address management and communication protocols from the battery management system and consolidates control functions into the power control system. By using direct voltage monitoring and simple threshold-based control, the system eliminates the need for complex sensor address reservations and communication arrangements, reducing resource requirements while maintaining operational organization.
Data Source
AI summary
An integrated battery control system incorporates a battery management system and a power control system to reliably and safely provide power to vehicles and other mobile devices. The integrated power control system incorporates safety features to protect the batteries from dropping below a threshold voltage or being overcharged, and from operating the vehicle when it is coupled with an AC power supply. An integrated power control system may be contained in a control enclosure having a computing device, battery power input, an AC power input, a power output switch, a power output, a key-switch interface and a shunt to measure current flow. The power control system regulates electrical power delivery to a drive motor and a pre-charge resistor as a function of the battery state of charge. When a battery unit is below a threshold value, power delivery is disabled to the drive motor and a pre-charge resistor.