Battery Temperature Prediction for Efficient External Charging
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Solution Overview
Problem
Externally chargeable vehicles face inefficiencies in battery charging due to temperature mismatches between arrival destinations and optimal charging temperatures, leading to reduced charging efficiency.
Innovation Solution
A vehicle system that includes a power storage device, a driving unit, a coupling unit for external charging, and a control device that predicts and manages the battery temperature to ensure it falls within the range of highest charging efficiency upon arrival at a charging-available destination, using temperature control means like cooling and heating devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the vehicle arrives at a destination and immediately starts external charging, then charging can begin quickly, but the battery temperature may not be within the optimal range for charging, reducing charging efficiency
Solution Approach 1:
The control device performs preliminary temperature prediction and adjustment before charging begins. It calculates the predicted battery temperature at the destination and activates heating or cooling operations in advance to ensure the battery reaches the optimal temperature range (e.g., 15°C to 35°C) before external charging starts, thereby avoiding temperature-related charging inefficiency
Solution Approach 2:
The system dynamically adjusts the battery temperature management strategy based on real-time conditions. It continuously monitors current battery temperature, ambient temperature, and predicted destination temperature to adaptively control heating/cooling operations, ensuring the battery temperature remains within the optimal charging range while minimizing energy consumption and charging time
2Productivity
If the battery temperature is controlled to be within the optimal range for charging efficiency, then charging efficiency improves, but the complexity of temperature control increases
Solution Approach 1:
The control device implements a feedback mechanism that continuously monitors battery temperature and compares it with the optimal charging temperature range. Based on this feedback, it automatically adjusts heating or cooling operations to maintain the battery temperature within the desired range, simplifying the control process while ensuring optimal charging conditions
Solution Approach 2:
The system uses the vehicle's existing thermal management infrastructure (air conditioning system, heater) to self-regulate battery temperature. The control device leverages these existing components to provide heating or cooling to the battery as needed, avoiding the need for dedicated battery temperature control hardware and reducing overall system complexity
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
Enables quick and efficient external charging by maintaining the battery temperature within the optimal range for charging efficiency, preventing overheating, and ensuring efficient energy utilization.
Implementation Method 1
a cooling fan cooling a high voltage battery mounted on a vehicle
Implementation Method 2
a temperature sensor detecting the temperature of the high voltage battery
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
A vehicle (1) includes a battery (B) as a power storage device that can be charged and discharged, a booster unit (32), an inverter (36), and a motor generator (MG1, MG2) operating as a vehicle driving unit receiving electric power supply from the battery (B) to drive the vehicle, a coupling unit (37) coupling the vehicle with an external power supply for charging the battery (B) from the outside of the vehicle, and a control device (14) performing control related to the battery (B). The control device (14) determines whether or not a destination is a charging-available place where the battery (B) can be charged from the outside of the vehicle, and if the destination is a charging-available place, performs control related to the battery (B) so that the temperature of the battery (B) is a charging-efficient temperature on arrival at the destination.