Battery Precooling Control for Predicted High-Load EV Driving
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Solution Overview
Problem
In electric vehicles, high load conditions lead to excessive battery temperature increases, limiting output and reducing driving performance due to increased power consumption by the battery cooling, powertrain cooling, and HVAC systems, compromising safety and efficiency.
Innovation Solution
A control method that precools the battery before high-load driving conditions based on estimated driving information, adjusting HVAC and cooling system operations to maintain optimal temperatures and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the battery cooling system operates at high power to cool the battery during high load conditions, then the battery temperature is controlled, but the power consumption of the vehicle increases
Solution Approach 1:
The system performs preliminary cooling of the battery before high load conditions occur by detecting navigation destination information and estimating future battery temperature. The cooling system is activated in advance to maintain optimal battery temperature, avoiding the need for high-power cooling during actual high load operation when power consumption would be excessive.
2Reliability
If the battery output is limited to protect the battery from thermal damage, then battery safety is improved, but driving performance is reduced
Solution Approach 1:
The system predicts future battery temperature based on navigation destination information and estimated driving conditions. By cooling the battery in advance before thermal stress occurs, the battery remains within safe operating parameters during high load conditions, eliminating the need for output limitation while maintaining safety.
3Temperature
If the cooling system components (pump, expansion valve, compressor) operate at high capacity to cool the battery, then battery temperature control is improved, but the operating load and power consumption of HVAC and powertrain cooling systems increase
Solution Approach 1:
The system activates cooling components (pump, expansion valve, compressor) in advance based on predicted battery temperature from navigation data. This preliminary operation reduces battery temperature before high load conditions, allowing these components to operate at lower capacity during actual high load periods, thereby reducing overall power consumption and operating load.
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
Precooling the battery prevents power limits and enhances safety and efficiency by maintaining optimal operating conditions, reducing the risk of battery damage and improving overall vehicle performance.
Implementation Method 1
a battery cooling system configured to cool the battery
Implementation Method 2
heat generating amount of the battery
Data Source
AI summary
An embodiment is a control method for cooling a battery, the control method including in response to a destination being input to a navigation, determining estimated high-load driving timing of the battery based on estimated driving information of a vehicle, and in response to a determination that a temperature difference between the actual temperature of the battery and a reference temperature before the estimated high-load driving timing is lower than or equal to a precooling operating value, precooling the battery until an actual temperature of the battery reaches a target temperature by controlling an operation of each component of a battery cooling system.