Multi-Battery Power Station Relay Control for Safe Charge-Discharge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Power stations equipped with multiple battery packs face challenges in simultaneous charging and discharging due to the risk of explosion associated with lithium batteries, preventing simultaneous operation when a load is connected.
Innovation Solution
A method of controlling charging and discharging by a main controller that distinguishes between battery packs to be charged and discharged, using input and output relay units to manage connections with external charge sources and loads, allowing for sequential charging and discharging while ensuring safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If lithium batteries are used in power stations for charging and discharging, then energy storage capacity is improved, but the risk of explosion increases when simultaneous charging and discharging is attempted
Solution Approach 1:
The power station divides the battery system into multiple independent battery packs (first battery pack and second battery pack). Each battery pack can be independently controlled for charging or discharging operations, allowing simultaneous charging and discharging at the system level while maintaining safety at the individual pack level.
Solution Approach 2:
The control system dynamically assigns different battery packs to charging or discharging modes based on real-time operational needs. The main controller can switch which battery pack performs which function, enabling flexible simultaneous charging and discharging operations without fixed roles for each battery pack.
2Productivity
If multiple battery packs are connected to allow simultaneous charging and discharging, then operational efficiency is improved, but system complexity increases due to need for relay control
Solution Approach 1:
The relay units are designed with multi-functionality, serving both as connection switches and as control elements. Each relay unit can connect or disconnect its corresponding battery pack from either the charging source or the load, and the main controller uses these same relay units to manage both charging and discharging operations, reducing the need for separate control mechanisms.
3Adaptability or versatility
If battery packs are detachably provided for separate use, then user flexibility is improved, but connection reliability may deteriorate
Solution Approach 1:
The system performs preliminary checks before allowing detachment or connection of battery packs. The main controller verifies the operational state, charge level, and connection status before permitting user actions, ensuring that detachment occurs only when safe and appropriate, thus maintaining reliability while enabling flexibility.
Data Source
AI summary
A method of controlling charging and discharging of a power station equipped with multiple battery packs, performed by a power station including N (N is a natural number equal to or greater than 2) battery packs mounted to be electrically charged/discharged and including a main controller controlling the charging/discharging, includes charging, by the main controller, the N battery packs in a determined charge order by controlling N input relay units connecting the N battery packs to an external charge source, and when a load is connected from the outside during the charging operation, calculating, by the main controller, an amount of electricity required by the load, controlling N output relay units connecting the N battery packs to the load to connect battery packs by the number corresponding to the calculated amount of electricity to the load and perform a discharging operation, wherein the charging operation and the discharging operation are performed simultaneously.