EV Battery Heating Control Across Charging and Post-Charge Periods
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Solution Overview
Problem
Existing vehicle power storage systems do not optimally adjust the temperature of the power storage device during and after external charging, particularly in low-temperature environments, affecting charging efficiency and power output.
Innovation Solution
A vehicle system with a heating device and controller that adjusts the temperature of the power storage device in two distinct periods: a first period during charging to maintain high efficiency and a second period after charging to conserve energy, with the second temperature adjustment being lower than the first to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the temperature of the power storage device is adjusted to a high level during external charging, then charging efficiency is improved, but power consumption increases during the period after charging
Solution Approach 1:
The patent applies dynamics by making the temperature adjustment target dynamic based on the charging state. The controller sets different temperature targets for the first period (during charging) and second period (after charging). During charging, a higher temperature target is used to optimize charging efficiency, while after charging, the target is lowered to reduce power consumption. This dynamic adjustment resolves the contradiction between maintaining high charging efficiency and reducing post-charging power consumption.
Solution Approach 2:
The patent changes the temperature parameter based on the charging state. The controller adjusts the temperature adjustment target from a first temperature (during charging) to a second temperature (after charging), where the second temperature is lower than the first. This parameter change allows the system to optimize charging performance when needed while reducing energy consumption when charging is complete, effectively resolving the technical contradiction.
2Power
If the temperature of the power storage device is maintained at a high level after external charging, then power output performance is improved, but energy waste increases
Solution Approach 1:
The patent applies partial action by providing temperature adjustment only when necessary. During external charging, temperature adjustment is performed to ensure optimal charging conditions. After charging, instead of maintaining high temperature continuously, the controller reduces the temperature target to a lower level that still ensures adequate power output performance while avoiding excessive energy waste. This partial action approach resolves the contradiction between power performance and energy loss.
3Productivity
If temperature adjustment control is performed continuously during and after external charging, then optimal charging and power output are achieved, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the temperature adjustment control into distinct segments based on charging state. The controller identifies the first period (during external charging) and the second period (after external charging) and applies different temperature adjustment strategies to each segment. This segmentation simplifies the control logic compared to continuous complex adjustment, while still achieving optimal charging efficiency and power output performance by tailoring the control approach to each operational phase.
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
This approach optimizes temperature adjustment for improved charging efficiency during external charging and reduces power consumption by maintaining the battery at a moderate temperature after charging, ensuring efficient power output when needed.
Implementation Method 1
the heating device is configured to heat the power storage device... heat generated in the reactor during external charging
Data Source
AI summary
A vehicle is configured to perform external charging for charging a battery using feed power that is supplied from a power facility provided outside the vehicle. The vehicle includes a heating device and an ECU. The heating device is configured to heat the battery. The ECU performs temperature adjustment control for adjusting a temperature of the battery by controlling the heating device in each of a first period and a second period, the first period being a period during which the external charging is performed, the second period being a period after the external charging is stopped. The temperature of the battery adjusted by the temperature adjustment control during the second period is lower than the temperature of the battery adjusted by the temperature adjustment control during the first period.