Battery Module Self-Heating With Reverse Polarity and Low-Voltage Input
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Solution Overview
Problem
Electric vehicle batteries face significant limitations in low-temperature environments, requiring heating to maintain functionality, but existing heating systems rely on high-voltage power sources, making them impractical and costly for widespread application.
Innovation Solution
A heating system comprising two battery modules connected in reverse polarity, allowing heating with a low-voltage power source or power grid, with switches controlled by a unit to manage current flow and temperature, ensuring efficient and safe heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If batteries are heated using a particular high-voltage power source in low-temperature environments, then heating effectiveness is improved, but device complexity and cost increase
Solution Approach 1:
The battery modules heat themselves by controlling current flow through their own internal resistance. The system uses the batteries' inherent electrical properties to generate heat, eliminating the need for external heating devices or complex high-voltage power sources. The control unit manages the charging/discharging cycles to produce heat directly within the battery modules.
Solution Approach 2:
The system changes the electrical parameters (current direction and magnitude) flowing through the battery modules to control the heating process. By alternating between charging and discharging modes, the system varies the current parameters to generate heat while maintaining battery safety and efficiency.
2Temperature
If batteries are heated using conventional external heating methods, then heating function is achieved, but ease of operation and practicality deteriorate
Solution Approach 1:
The battery system performs multiple functions: it serves as both the power source and the heating element. The same battery modules that provide electrical energy also generate heat through controlled current flow, eliminating the need for separate heating systems and simplifying the overall device operation.
Solution Approach 2:
The batteries heat themselves through internal resistance when current flows through them during controlled charging/discharging cycles. This self-heating mechanism eliminates the need for external heating devices, making the system easier to operate and more practical for real-world applications.
3Productivity
If battery modules are heated simultaneously, then heating efficiency is improved, but control complexity increases
Solution Approach 1:
The battery system is divided into multiple modules, each with independent switch control. This segmentation allows the control unit to manage each module separately, enabling simultaneous heating of multiple modules while maintaining simple and modular control architecture. Each switch controls a specific battery module's charging/discharging state independently.
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 enables efficient and cost-effective battery heating in electric vehicles using a low-voltage power source, improving practicality and reducing the risk of combustion, while extending battery life and enhancing operational stability.
Implementation Method 1
the first battery module and the second battery module can be heated through a low-voltage power source or a power grid
Data Source
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AI summary
This application provides a heating system, a heating method and apparatus, and an electric device. The heating system includes a first input end, a second input end, a first battery module, a second battery module, a first switch, a second switch, and a control unit, where the first input end and the second input end are configured to connect to an external input power source. The first switch is connected between a first terminal of the first battery module and a first terminal of the second battery module, a second terminal of the first battery module is connected to a second terminal of the second battery module, the second switch is connected between the first input end and the first terminal of the second battery module, and the second input end is connected to the first terminal of the first battery module. The control unit is connected to the first switch and the second switch, and the control unit is configured to control the first switch and the second switch to be turned on or off, to heat the first battery module and the second battery module through the input power source. In the foregoing manner, a requirement for the heating power source is lowered, thereby improving practicability.