Battery Stack AC Output for EV Motor Voltage Management
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Solution Overview
Problem
Existing charge storage devices for electric vehicles face inefficiencies in voltage management and power distribution, particularly in generating alternating current (AC) voltage for motors, which affects the performance and efficiency of electric vehicle systems.
Innovation Solution
The system employs multiple battery stacks connected in series to produce AC voltage with specific phases and amplitudes, canceling out DC offset by combining AC voltages from multiple battery stacks, and connects these stacks to motors with multiple coils to provide three-phase AC voltage, optimizing voltage distribution and motor operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple battery stacks are connected in series to generate AC voltage for motors, then the efficiency and performance of electric vehicle systems is improved, but the device complexity and voltage management difficulty increases
Solution Approach 1:
The battery system is divided into multiple independent battery stacks, each with its own control circuitry. This segmentation allows individual management of each stack's voltage and charge state, simplifying the overall control architecture while enabling efficient AC voltage generation through series connection. Each stack can be independently monitored and adjusted, resolving the complexity issue while maintaining high system efficiency.
2Reliability
If multiple battery stacks are used to produce AC voltage with specific phases and amplitudes, then the voltage distribution and motor operation are optimized, but the manufacturing complexity and assembly difficulty increases
Solution Approach 1:
Multiple battery stacks are merged into a unified modular architecture where identical standardized units are combined through series connection. This merging approach enables optimized voltage distribution and three-phase AC generation while simplifying manufacturing through standardization. The modular design allows for streamlined assembly processes and easier integration with motor systems.
3Loss of energy
If battery stacks are configured to cancel out DC offset by combining AC voltages, then energy losses are reduced and performance is improved, but the control system complexity increases
Solution Approach 1:
The control system leverages the inherent characteristics of multiple battery stacks to convert potential harmful DC offset into beneficial AC voltage generation. By synchronizing and combining AC voltages from multiple stacks with specific phase relationships, the system naturally cancels DC offset components while maximizing useful AC output. This approach reduces energy losses without requiring complex additional control mechanisms.
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 configuration enhances the efficiency of electric vehicle systems by providing a stable and optimized AC voltage supply to motors, improving performance and reducing energy losses, while allowing for flexible operation modes such as zero voltage loop and discharge/recovery modes.
Implementation Method 1
The plurality of battery cells may be connected to each other in one or more battery stacks. A battery stack may include multiple battery cells and multiple respective circuitries in a series string.
Implementation Method 2
The system employs multiple battery stacks connected in series to produce AC voltage with specific phases and amplitudes, canceling out DC offset by combining AC voltages from multiple battery stacks
Implementation Method 3
the plurality of battery cells may be connected to one or more coils of a motor of an electric vehicle
Data Source
AI summary
Systems, apparatuses, and methods are described for charge storage devices with a plurality of battery cells. The plurality of battery cells may be connected to each other in one or more battery stacks. The plurality of battery cells may be connected to one or more coils of a motor of an electric vehicle.