Battery Pack Self-Heating Circuit for Faster Uniform Warm-Up
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Solution Overview
Problem
Battery packs in electric transportation means experience slow heating speed and long heating time due to large heat loss in external heating methods using air or water channels, and non-uniform temperature distribution.
Innovation Solution
A battery self-heating control system utilizing a battery pack with a first and second battery group connected in series, a winding, a first and second switch assembly, and a capacitor, where the controller controls the switch assemblies to alternate charging and discharging, generating an alternating current for internal heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If external heating method using air or water channel is used, then heating capability is provided, but heat loss is large and heating speed is slow
Solution Approach 1:
The battery pack uses its own internal resistance and current to generate heat directly within the battery cells, eliminating the need for external heating devices and long heat transfer channels. This self-heating approach reduces heat loss and improves heating speed by generating heat at the source rather than transferring it from outside.
Solution Approach 2:
The invention extracts the heating function from the external heating system and relocates it directly into the battery pack's internal circuitry. By using the battery's own current flowing through its internal resistance, the heating capability is integrated directly into the battery structure, removing the inefficient external heating pathway.
2Duration of action of moving object
If external heating method using air or water channel is used, then heating capability is provided, but heating time is long
Solution Approach 1:
The battery pack generates heat internally using its own electrical energy and internal resistance, eliminating the time-consuming heat transfer process through external channels. This self-heating mechanism significantly reduces heating time by directly heating the battery cells from within rather than transferring heat from outside.
3Stability of the object's composition
If external heating method using air or water channel is used, then heating capability is provided, but temperature field distribution is non-uniform
Solution Approach 1:
By generating heat directly within each battery cell through its internal resistance, the heating is distributed uniformly throughout the battery pack. This eliminates the non-uniform temperature fields caused by external heating channels, as each cell heats itself from the inside out, ensuring consistent temperature distribution across the entire battery assembly.
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 system achieves rapid and uniform heating of the battery pack by generating heat internally, reducing heating time and improving temperature distribution.
Implementation Method 1
a resistor of the battery heater is energized to generate heat
Implementation Method 2
making the first battery group and the second battery group perform alternate charging and discharging through the winding
Data Source
AI summary
A battery self-heating control system includes a battery pack, a winding, a first switch assembly, a second switch assembly, a capacitor, and a controller. The battery pack includes a first battery group and a second battery group connected in series, a connection line led out between the first and the second battery groups, and connected to one end of the winding. The first switch assembly and the second switch assembly are connected in series, the first switch assembly is electrically connected to a positive electrode of the first battery group and a first end of the capacitor, the second switch assembly is electrically connected to a negative electrode of the second battery group and a second end of the capacitor, the first end and the second end of the capacitor connected to a load. The controller is electrically connected to the first switch assembly and the second switch assembly.