Charging Control Device Using Current Detection for Connection State
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Solution Overview
Problem
Existing charging control systems for electric vehicles require dedicated sensors and additional wiring to detect vehicle connection states, leading to increased costs and complexity.
Innovation Solution
A charging control device that uses current detecting means to determine the connected or disconnected state of vehicles based on current values, eliminating the need for dedicated sensors and reducing costs by utilizing existing current detection infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dedicated sensor and signal line wiring are installed to detect vehicle connection state, then the connection detection accuracy is improved, but the system cost and complexity increase
Solution Approach 1:
The current detecting means is designed to serve multiple functions: it detects both the vehicle connection state and the charging current magnitude. By making the current detection system multi-functional, the patent eliminates the need for separate dedicated sensors and signal line wiring, thereby reducing system complexity and cost while maintaining accurate connection state detection
Solution Approach 2:
The system uses the existing current detection infrastructure to automatically determine connection state without requiring additional dedicated detection components. The current detecting means serves itself by providing dual functionality, eliminating the need for separate connection detection hardware and reducing overall system complexity
2Productivity
If multiple vehicles are charged simultaneously to meet power demand, then the productivity is improved, but the main breaker trips due to overloaded current
Solution Approach 1:
The control means periodically monitors the total current consumption across all charging paths and dynamically adjusts the charging schedule. By implementing periodic detection and control of current levels, the system can manage multiple vehicle charging sessions while preventing the main breaker from tripping due to overloaded current
Solution Approach 2:
The charging control system dynamically adjusts the charging parameters and schedule based on real-time current detection results. The control means modifies charging operations in response to changing load conditions, enabling flexible management of multiple vehicles being charged simultaneously while maintaining safe current levels
3Power
If the power under contract with power company is increased to accommodate higher power consumption, then the power capacity is improved, but the cost increases
Solution Approach 1:
The system implements feedback control by continuously detecting current consumption and using this information to optimize the charging schedule. The control means adjusts charging operations based on detected current levels, enabling efficient utilization of existing power capacity without requiring increased contracted power from the power company, thereby avoiding additional costs
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
The solution effectively reduces the cost of detecting vehicle connection states and prevents main breaker tripping by efficiently managing charging schedules and power distribution without increasing contracted power capacity.
Implementation Method 1
a current detecting means (11) configured to detect current supplied to a vehicle individually via one or a plurality of charging paths
Data Source
AI summary
In a charging control device, a determining unit individually determines whether a charging path and a vehicle are in a connected state or non-connected state based on a current value detected by a current detecting means. The state of connection with the vehicle is detected not by an exclusive sensor as it is done in the prior art but by using a current detection result by the current detecting means. Hence the cost for detecting the state of connection with the vehicle can be reduced.