Battery Temperature Control for External Charging Heat Accumulation
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Solution Overview
Problem
Existing battery temperature regulating devices for electric and hybrid vehicles inefficiently utilize battery heat, leading to increased power consumption and reduced travel distance, especially when external charging is used without an engine to warm the vehicle compartment.
Innovation Solution
A vehicular battery temperature regulating device that incorporates a heat exchanging unit and a control unit to manage battery temperature during external charging, allowing heat accumulation only when necessary, thereby optimizing power usage and extending travel distance by utilizing the battery as a heat accumulation unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the battery temperature is raised to the same temperature without variation during external charging, then the battery can be effectively utilized as a heat accumulation unit, but additional power will be consumed
Solution Approach 1:
The patent applies dynamics by making the target temperature variable rather than fixed. The control unit dynamically adjusts the target temperature based on outside air temperature conditions: setting it higher when outside temperature is low (to accumulate heat for compartment warming) and lower when outside temperature is high (to avoid unnecessary power consumption). This dynamic adjustment resolves the contradiction between effective heat accumulation and power consumption.
Solution Approach 2:
The patent changes the temperature parameter adaptively based on external conditions. By modifying the target temperature parameter according to outside air temperature, the system optimizes the balance between heat accumulation effectiveness and power consumption, avoiding the waste of raising battery temperature when it's not needed for compartment warming.
2Duration of action of moving object
If the battery is used as a heat accumulation unit during external charging, then the available traveling distance can be increased, but power consumption will increase if heat accumulation is unnecessary
Solution Approach 1:
The patent implements feedback control by continuously monitoring outside air temperature and adjusting the battery target temperature accordingly. The control unit receives feedback about environmental conditions and modifies charging parameters to accumulate heat only when it will benefit extended traveling distance through compartment warming, thereby avoiding unnecessary power consumption when heating is not required.
Solution Approach 2:
The system changes the target temperature parameter based on feedback from outside temperature sensors, optimizing the trade-off between heat accumulation benefits (extended travel distance) and power consumption costs.
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 solution effectively suppresses unnecessary power consumption during external charging and allows for the efficient use of battery heat to warm the vehicle compartment, enhancing the battery's performance and extending the vehicle's travel distance by determining the need for heat accumulation based on outside temperature.
Implementation Method 1
a heat exchanging unit configured to allow heat exchange with the air conditioning system
Implementation Method 2
using the heat in the battery to warm the compartment or the like. Since the drive battery in an electric vehicle or a hybrid vehicle is large in both size and heat capacity, it is possible to utilize the battery more effectively by using it as a heat accumulation unit
Data Source
AI summary
A battery temperature regulating device is provided with a low temperature heat exchanger configured to allow heat exchange with the air conditioning system, a battery temperature regulating unit configured to allow heat exchange with the low temperature heat exchanger so as to regulate the temperature of the battery to approach a target temperature, and a control unit configured to control the battery temperature regulating unit. In the case where the charging is performed from the power supply external to the vehicle, the control unit determines whether or not it is necessary to accumulate heat in the battery, and in the case where it is determined that the heat accumulation is necessary, the control unit sets the target temperature of the battery during charging higher than that in the case where it is determined that the heat accumulation is unnecessary.