EV Battery Charging Controller Intermittent Heating
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Solution Overview
Problem
Battery exhaustion occurs due to frequent temperature increases in cold regions during timer charging settings in electric vehicles, leading to increased power consumption and potential battery degradation.
Innovation Solution
A battery charging system with a charging controller that intermittently activates during timer charging settings, using a heater to maintain battery temperature within specific target ranges, switching between first and second temperature increase modes to balance temperature rise and power consumption, thereby preventing battery freezing while minimizing energy expenditure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heater is operated to increase the battery temperature during timer charging setting period, then the battery temperature is maintained above freezing point, but the battery power is consumed causing battery exhaustion
Solution Approach 1:
The charging controller is intermittently activated during the timer charging setting period rather than continuously. The controller activates at specific intervals to check battery temperature and operate the heater only when necessary, rather than maintaining continuous heating. This periodic activation pattern reduces overall power consumption while still preventing battery freezing during the standby period.
2Reliability
If the charging controller is continuously activated to monitor and maintain battery temperature, then the battery is protected from freezing, but the power consumption increases causing battery exhaustion
Solution Approach 1:
The charging controller operates intermittently during the timer charging setting period, activating at predetermined intervals to check battery temperature and operate the heater only when the battery temperature is at or below the freezing point, rather than continuous monitoring and heating.
Solution Approach 2:
The system uses the external power supply that is already connected for charging purposes to power the heater during timer charging setting period, rather than relying solely on battery power. This allows the battery to serve itself by using the charging infrastructure to maintain its own temperature.
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 system effectively prevents battery freezing during timer charging settings by efficiently managing temperature increases, reducing power consumption, and extending the battery's operational period without causing exhaustion.
Implementation Method 1
a heater configured to increase the battery temperature
Data Source
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AI summary
In a case where an external charging start time is set in an external charging timer when a charging plug (30) is connected to a charging connector (32), a charging controller (64) is configured to perform standby setting of external charging before the external charging start time and transits to a pause state. The charging controller (64) is intermittently activated during a timer charging setting period from a pause period start time when transition is made to the pause state to the external charging start time, and when a battery temperature at the time of activation of the charging controller (64) is equal to or lower than a predetermined temperature, execute a temperature increase mode in which a heater is operated to increase the temperature of a main battery.