Energy-Buffered EV Charging for High Power Without Grid Upgrades
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Solution Overview
Problem
The charging speed of electric vehicles is a critical issue that affects their development and public acceptance, and upgrading the power grid with external transformers or expanding transformer capacity is costly and inefficient.
Innovation Solution
A charging method and apparatus that utilizes an energy storage apparatus to determine charging demand and discharge capacity, allowing for low-power input and high-power output without grid upgrades, with flexible charging modes based on actual conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If external transformers or transformer capacity are expanded to improve charging speed, then charging power is increased, but construction cost increases
Solution Approach 1:
An energy storage apparatus is introduced as an intermediary component between the power grid and the battery apparatus. The energy storage apparatus stores energy when power demand is low and releases it when charging is needed, enabling high-power charging without requiring expensive grid upgrades. This mediator allows the system to achieve high charging power while avoiding direct investment in transformer capacity expansion.
Solution Approach 2:
The energy storage apparatus performs preliminary energy accumulation during periods of low power demand or off-peak hours. By pre-storing energy in the energy storage apparatus, the system prepares high-density energy reserves that can be rapidly discharged during charging operations, eliminating the need for continuous high-power grid supply and associated infrastructure upgrades.
2Productivity
If energy storage apparatus with high discharge power is used to improve charging speed, then charging efficiency is improved, but device complexity increases
Solution Approach 1:
The energy storage apparatus serves multiple functions: it acts as an energy buffer between the grid and battery, provides peak shaving capability, enables rapid charging, and can potentially supply power during grid outages. By consolidating these multiple functions into a single component, the system achieves high charging efficiency without proportionally increasing overall device complexity.
Solution Approach 2:
The system dynamically adjusts operating parameters such as charge/discharge rate, power output, and energy transfer timing based on grid conditions, battery state of charge, and charging demand. This parameter optimization allows the energy storage apparatus to operate efficiently across varying conditions without requiring overly complex hardware designs for each specific scenario.
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 improves charging speed and efficiency while reducing construction costs by leveraging energy storage capabilities, accommodating various charging demands, and enhancing user experience.
Implementation Method 1
a charging method and apparatus that utilizes an energy storage apparatus to determine charging demand and discharge capacity
Data Source
AI summary
Embodiments of this application disclose a charging method and a charging apparatus, which can effectively improve the charging speed of a battery apparatus at a relatively low cost. The charging method is applied to a charging apparatus, where the charging apparatus includes an energy storage apparatus, and the charging apparatus is configured to charge a battery apparatus through the energy storage apparatus, the method including: determining charging demand information of the battery apparatus, where the charging demand information is used to indicate charging demand power of the battery apparatus; determining discharge capacity information of the energy storage apparatus; determining a charging parameter of the charging apparatus according to the discharge capacity information and the charging demand information; and charging the battery apparatus according to the charging parameter, where charging power corresponding to the charging parameter is less than or equal to the charging demand power.