Battery Group Internal Heating via Controlled Discharge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery heating systems face inefficiencies due to low heating power and slow heating times, as they rely on external heating sources and silicon heating wires that generate heat outside the battery group, requiring several hours to reach operational temperature.
Innovation Solution
A battery heating system utilizing a large-current discharge module with a switch and controller to internally heat the battery group via its internal resistance, employing a nickel-chromium alloy heating wire and cooling liquid to achieve rapid and efficient heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If silicon heating wires are used to heat the battery group from outside, then the battery group can be heated, but the heating speed is very slow and requires several hours
Solution Approach 1:
Instead of heating the battery group from outside using heating wires, the invention inverts the approach by using the battery group itself as the heating source. The battery's internal resistance generates heat through controlled discharge, heating the battery from within. This fundamental reversal of the heating direction enables rapid heating in under 30 seconds compared to the several hours required by external heating methods.
2Power
If a relay is used as a switch to control the heating wire, then the heating process can be controlled, but the heating power is relatively low
Solution Approach 1:
The battery group serves itself as both the heat source and the controlled object. By utilizing the battery's own internal resistance and controlled discharge, the system eliminates the need for external heating devices and complex switching mechanisms. The battery autonomously generates heat through its internal electrochemical processes, significantly increasing heating power while simplifying the overall system structure.
3Productivity
If the battery group discharges with low current to heat itself, then the battery can be heated, but the heating efficiency is low and cannot meet immediate use requirements
Solution Approach 1:
The system dynamically adjusts the discharge current to optimize heating efficiency. By controlling the discharge process to operate at higher currents rather than low current, the battery generates sufficient heat rapidly while maintaining safe operational parameters. This dynamic current control enables the battery to achieve both high heating power and high heating efficiency, meeting immediate vehicle use requirements.
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 quickly heats the battery group from the inside, reducing heating time to under 30 seconds and improving efficiency, allowing for immediate vehicle use or charging, while also being portable and not limited to external charging.
Implementation Method 1
the battery group discharges with a relatively large current via the large-current discharge module 4, so that the battery group 1 is heated due to an internal resistance of the battery group 1
Data Source
Figure 1~2
Figure 3
AI summary
Embodiments of the present disclosure provide a battery heating system, a battery assembly and an electric vehicle. The battery heating system includes: a battery group having a positive pole and a negative pole; a switch having a first end connected with the positive pole; a large-current discharge module, and a controller connected to the switch and configured to control the switch according to a temperature of the battery group. A first end of the large-current discharge module is connected to a second end of the switch, and a second end of the large-current discharge module is connected to the negative pole. When the switch is turned on, the battery group discharges via the large-current discharge module and the battery group is heated due to an internal resistance thereof.