Electric Transport Battery Charge Management
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Solution Overview
Problem
Current solutions for managing electrical energy storage modules in electric transport systems, particularly in multi-vehicle systems like tunnel construction, face challenges in voltage balancing and energy recovery due to limitations in existing battery management systems, which restrict the full utilization of battery capacity and hinder efficient energy management across multiple modules.
Innovation Solution
A method and system for managing the charge of multiple electrical energy storage modules in an electric transport system, involving a central control unit that determines a target state of charge based on route characteristics and system efficiency, allowing for optimized charging and voltage balancing across modules, enabling energy recovery during braking and minimizing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If voltage balancing is performed on fully charged modules, then cell voltage balance is improved, but charging time increases significantly
Solution Approach 1:
The system performs voltage balancing operations during the charging process itself, before the module reaches full charge, rather than waiting for complete charging. The control unit monitors cell voltages in real-time and applies balancing current to cells that are ahead of the average, preventing voltage imbalances from developing in the first place.
Solution Approach 2:
The voltage balancing operation is integrated into the charging process and occurs continuously throughout charging, rather than being a separate post-charging step. This allows the charging and balancing operations to overlap, eliminating idle time and making the process more efficient.
2Quantity of substance
If modules are charged to 100% state of charge, then energy capacity is maximized, but regenerative braking capability is lost
Solution Approach 1:
The control unit dynamically adjusts the target state of charge for each module based on real-time system conditions, including whether regenerative braking is available or needed. Modules that will be used for energy recovery during braking are kept below full charge, while modules not needed for braking can be charged to maximum capacity.
Solution Approach 2:
The system changes the state of charge parameter of individual modules based on their role in the system. Modules designated for regenerative braking operations maintain a state of charge below 100%, while other modules can reach full charge, allowing the system to optimize both energy capacity and braking capability.
3Productivity
If multiple modules are managed independently, then individual module performance is optimized, but system-wide energy efficiency decreases
Solution Approach 1:
The control unit manages multiple modules as an integrated system rather than independent units. It monitors the state of charge of all modules and strategically selects which modules to charge or discharge based on system-wide optimization criteria, including minimizing energy losses and maximizing regenerative braking opportunities.
Solution Approach 2:
The control unit performs multiple functions simultaneously: it manages individual module charging states, coordinates regenerative braking energy recovery across all modules, performs voltage balancing, and optimizes overall system efficiency. This centralized multi-functional control resolves the contradiction between individual optimization and system-wide efficiency.
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 optimizes the state of charge of each module, ensures efficient energy use, and extends the availability of the transport system by allowing for regenerative braking and voltage balancing, thereby enhancing the system's operational efficiency and autonomy.
Implementation Method 1
an electrical energy storage module for supplying the motor with electrical energy
Implementation Method 2
a converter for controlling the electric motor
Implementation Method 3
at least one electric motor for driving the vehicle's wheels
Implementation Method 4
current solutions allow for the recovery of electrical energy from storage modules through regenerative braking within the transport system
Data Source
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Figure 6
AI summary
The invention relates to a method for managing the electric charging of a plurality of electrical-energy storage modules (Mi_X), said modules being employed in an electrically powered transport system (1) that is intended to carry out a trip, said process comprising: A step of determining a target state of charge (SOCtarget_T) required to be able to carry out said trip without recharging, and taking into account an electrical demand, for charging and discharging of the electrical-energy storage modules, induced by the operation of the transport system during said trip; A step of determining, for each storage module of the transport system, a state of charge (SOC_Mi_X) to be achieved, this state of charged being determined for each module depending: On the determined target state of charge (SOCtarget_T); On implementation of one or more management functions on the electrical-energy storage modules of the system.