Battery Internal Heating Using SOC-Based Current Frequency Tuning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery heating technologies suffer from low heating rates, leading to inefficient and uneven heating, particularly in varying temperature environments, which can result in lithium precipitation and reduced battery performance.
Innovation Solution
A battery heating method that determines optimal current frequency and amplitude based on real-time temperature and state of charge using pre-established data tables, ensuring efficient and safe heating by adjusting parameters in each heating cycle to prevent lithium precipitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed heating parameters are used, then the heating process is simple to control, but the heating rate is low and heating efficiency is poor
Solution Approach 1:
The patent applies dynamics by transitioning from fixed heating parameters to dynamic parameter adjustment. The heating current frequency and amplitude are continuously adjusted based on real-time battery temperature and state of charge, allowing the system to adapt to changing battery conditions and achieve high heating rates while maintaining safety.
Solution Approach 2:
The patent implements parameter changes by modifying heating current frequency and amplitude based on battery state. Different heating stages use different frequency and amplitude combinations, with the heating current frequency being adjusted according to battery temperature and state of charge to optimize heating efficiency at each stage.
2Productivity
If high current amplitude is used for heating, then the heating rate increases, but lithium precipitation may occur reducing battery safety
Solution Approach 1:
The patent applies periodic action through pulsed heating current with variable frequency. By using alternating current with adjustable frequency and amplitude, the system achieves effective heating while preventing continuous high current exposure that would cause lithium precipitation. The periodic nature of the current allows thermal diffusion periods that prevent concentration gradients leading to precipitation.
Solution Approach 2:
The patent implements feedback control by continuously monitoring battery temperature and state of charge, then adjusting heating current parameters accordingly. The heating current frequency is determined based on real-time battery state, creating a closed-loop control system that prevents overheating and lithium precipitation while maintaining high heating rates.
3Productivity
If heating parameters are adjusted in real-time based on battery state, then heating efficiency improves, but computing resource consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing heating parameter lookup tables that store optimal heating current frequency and amplitude combinations for different battery states. During heating, the system only needs to query these pre-computed tables based on current temperature and state of charge, avoiding complex real-time calculations while maintaining optimal heating efficiency.
4Measurement precision
If multiple data tables for different current amplitudes are established, then heating parameter accuracy improves, but data table establishment complexity increases
Solution Approach 1:
The patent implements universality by creating a single comprehensive heating parameter lookup table that handles all heating scenarios. The table is designed to provide appropriate heating current frequency and amplitude for any battery state and heating requirement, eliminating the need for multiple separate data tables while maintaining parameter accuracy across all operating conditions.
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
This approach enhances heating efficiency and safety by optimizing current frequency and amplitude, improving battery performance across different temperature environments and extending battery life by preventing lithium precipitation.
Implementation Method 1
Batteries are usually heated based on fixed heating parameters
Data Source
AI summary
Embodiments of the present disclosure provide a battery heating method, apparatus, device and storage medium. A battery heating method includes: acquiring a first temperature and a first state of charge of a battery; determining a first current frequency based on the first temperature, the first state of charge, and one or more preset first data tables, the first data tables including correspondence between the first temperature, the first state of charge, and the first current frequency under a condition of a first current amplitude; heating the battery based on the first current amplitude and the first current frequency. In the embodiments of the present disclosure, the current frequency and amplitude used for internal heating can be determined based on the temperature of the battery to improve the heating rate of the battery at various temperature environments.