EV Battery Controller Charging Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In electrically-driven vehicles, existing charging systems often result in unnecessary power consumption due to the charger controller being activated regardless of the battery state, leading to energy loss and reduced charging efficiency, even when the battery is fully charged.
Innovation Solution
An electrically-driven vehicle with a charging circuit that includes a battery controller to judge the battery state and activate the charger controller only when the battery is in a chargeable condition, using a switch and relay system to manage power flow between the battery and charger, ensuring efficient charging by calculating and applying the optimal charge power based on the battery state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the charger controller is activated regardless of the battery state, then the battery can be charged from the external power supply, but unnecessary power consumption occurs and energy is wasted when the battery is already fully charged
Solution Approach 1:
The battery controller is activated in advance upon detection of external power supply connection, performing preliminary assessment of battery state (charge level, temperature, voltage) before initiating charging. This preliminary action prevents unnecessary charger activation when the battery is already fully charged, thereby reducing energy waste while maintaining simple charging operation through automatic control.
2Productivity
If the charger controller is always activated, then charging can start immediately when power is supplied, but the charger controller consumes power unnecessarily when the battery does not need charging
Solution Approach 1:
The battery controller continuously monitors battery state parameters (charge level, temperature, voltage) and provides feedback to the charger controller. Based on this feedback, the charger controller intelligently activates or deactivates the charging function. This feedback mechanism ensures charging starts immediately when needed (maintaining high productivity) while preventing unnecessary power consumption when the battery is fully charged or in inappropriate states.
3Loss of energy
If the battery controller monitors battery state and controls charger activation, then energy loss is reduced, but the system complexity increases due to additional control logic
Solution Approach 1:
The patent merges the battery monitoring function and charger control function into an integrated control system. The battery controller simultaneously performs battery state monitoring, charging eligibility judgment, and charger activation control. This merging reduces overall system complexity by consolidating multiple functions into a single controller rather than requiring separate independent systems for each function.
Data Source
AI summary
In an electrically-driven vehicle comprising a battery which can be charged from an external power supply, a charger, a charger controller which controls the charger, and a battery controller which monitors a battery state, energy loss during the charging is reduced and charging efficiency is improved. A hybrid electric vehicle which is the electrically-driven vehicle includes a charging circuit having a charger which is connected to a high-voltage battery and a charge-time connection switch which is connected between the high-voltage battery and the charger, a charger ECU, and a battery ECU. The battery ECU is activated when a voltage signal is input, and when determining that the state of the high-voltage battery satisfies a chargeable condition, connects the charge-time connection switch, activates the charger ECU and transmits a signal representing the battery state to the charger ECU.