Parallel Charging Power Distribution via Dynamic CSMS Control
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Solution Overview
Problem
Existing methods for parallel battery charging face inefficiencies due to power bottlenecks when charging multiple batteries with different charge levels and limited charger capacity, leading to increased charging time and energy losses, especially in EV charging stations that require DC power conversion from AC sources, resulting in suboptimal grid utilization.
Innovation Solution
A system utilizing a Charging Station Management System (CSMS) with variable power switches and power meters to dynamically adjust charging power based on real-time measurements, allowing for optimized power distribution across multiple chargers, reducing energy losses by eliminating unnecessary AC/DC conversions and maximizing charger utilization through protocols like OCPP and Energy Management Systems (EMS) for balancing and directing power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple batteries are charged in parallel with fixed power allocation, then charging capacity is maximized, but charging time increases and resources are wasted when load is lower than maximum capacity
Solution Approach 1:
The patent implements dynamic power allocation by continuously monitoring the charge levels of multiple batteries and adjusting the power distribution in real-time. The system transitions from fixed power allocation to dynamic adjustment, allowing the charging station to adapt power distribution based on current charging needs, thereby reducing overall charging time while maximizing resource utilization.
Solution Approach 2:
The system incorporates feedback mechanisms where the charge status of each battery is continuously monitored and fed back to the control unit. This feedback enables the control unit to adjust power allocation dynamically, ensuring that power is optimally distributed among batteries at different charge levels, thus preventing resource waste and reducing charging time.
2Adaptability or versatility
If AC/DC conversion is used to charge EV batteries, then charging standards are met, but energy losses occur due to conversion inefficiency and heat dissipation
Solution Approach 1:
The patent extracts and eliminates the AC/DC conversion step from the charging system by implementing direct DC charging. The charging station is designed to provide DC power output directly, bypassing the conventional AC input and AC/DC conversion process. This extraction of the conversion环节 removes the source of energy loss while still meeting EV charging standards that require DC battery connection.
3Reliability
If the number of chargers is limited by maximum power capacity, then circuit overload is prevented, but grid utilization decreases when chargers are idle
Solution Approach 1:
The system dynamically adjusts the power capacity available to each charger based on real-time monitoring of battery charge levels. When some batteries are fully charged or near completion, the system dynamically reallocates their power capacity to other batteries that still need charging. This dynamic adjustment allows the same physical infrastructure to serve more vehicles over time, increasing grid utilization while maintaining circuit safety through continuous monitoring.
Data Source
AI summary
A system for parallel charging comprising: An electrical power source; a charging station management system; variable electric power switch controlled by the charging station management system; a charging device connected to the electrical power source via the variable electric power switch; an electrical power meter; a data channel for sending the measurement from the electrical power meter to the charging station management system; a battery powered device connected to the charging device via electrical power cable that is monitored by the electrical power meter; at least one other variable electric power switch controlled by the charging station management system. A method for enabling the system is also presented.