Efficient Battery Heating for Electric Vehicles in Cold Climates
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Summary
Problems
Battery exhaustion occurs due to frequent temperature increases during the timer charging setting period in electrically driven vehicles, especially in cold regions, leading to increased power consumption and potential battery freezing.
Innovation solutions
A battery charging system that includes a charging controller, temperature acquirer, and heater, which intermittently activates the heater to maintain the battery temperature above freezing levels during the timer charging setting period, using two temperature increase modes to balance temperature maintenance and power consumption, with the second mode having a lower temperature increase width and longer executable period to reduce power consumption.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the heater is operated frequently to increase battery temperature during timer charging setting period, then the battery temperature is maintained above freezing point, but the battery power is consumed excessively causing battery exhaustion
Why choose this principle:
The heating operation is performed periodically rather than continuously. The control unit determines whether heating is needed by checking if the battery temperature is below the freezing point at each activation during the timer charging setting period. This periodic action with conditional execution reduces overall power consumption while maintaining temperature above freezing when necessary.
Principle concept:
If the battery temperature is increased during timer charging setting period, then the battery remains operational and prevents freezing, but the charging controller must be activated frequently increasing system activity
Why choose this principle:
The charging controller utilizes its necessary intermittent activations during the timer charging setting period to also perform temperature monitoring and heating control. By combining the temperature check function with the existing activation schedule, the system achieves temperature management without requiring additional separate control activations, thus maintaining reliability while minimizing added complexity.
Application Domain
Data Source
AI summary:
A battery charging system that includes a charging controller, temperature acquirer, and heater, which intermittently activates the heater to maintain the battery temperature above freezing levels during the timer charging setting period, using two temperature increase modes to balance temperature maintenance and power consumption, with the second mode having a lower temperature increase width and longer executable period to reduce power consumption.
Abstract
In a case where an external charging start time is set in an external charging timer when a charging plug is connected to a charging connector, a charging controller is configured to perform standby setting of external charging before the external charging start time and transits to a pause state. The charging controller 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 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.