Resonant Pulse Charging Circuit for Electric Vehicle Battery Recovery
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Solution Overview
Problem
Traditional battery charging techniques are inefficient, particularly for large batteries like those in electric cars, as they convert most current into heat rather than charge, leading to long charging times and inability to recover batteries once they fall below a certain capacity or voltage.
Innovation Solution
A method and system that generate a series of current pulses at the resonant frequency of the battery, utilizing a regenerative braking system to convert mechanical energy into electrical energy, which is stored in capacitors and then fed to the battery as constructive resonant ringing pulses to enhance charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional continuous charging current is applied to the battery, then the battery can be charged, but most of the current is converted into heat energy rather than being retained as charge, resulting in low charging efficiency
Solution Approach 1:
The patent applies periodic pulsed current instead of continuous current to charge the battery. The controller delivers current in discrete pulses with specific timing, allowing the battery to accept charge more efficiently during the pulse periods while dissipating heat during the off periods. This periodic action resolves the contradiction by converting continuous current application into intermittent current delivery, improving charging efficiency while reducing heat generation.
2Productivity
If traditional charging techniques are used on large batteries such as electric car batteries, then the battery can be charged, but the charging process takes extremely long time (4-48 hours)
Solution Approach 1:
The system uses high-frequency pulsed current delivery to rapidly charge large batteries. By delivering current in intense periodic pulses rather than continuous low-level current, the system achieves much faster charging speeds. The pulsed nature allows the battery to accept charge in concentrated bursts, dramatically reducing charging time from hours to minutes while the controller manages the pulse timing and duration.
3Adaptability or versatility
If traditional battery chargers are used, then non-primary batteries can be charged, but batteries that fall below a certain capacity and voltage are considered dead and cannot be recovered
Solution Approach 1:
The patent employs periodic pulsed current with specific frequency and duration parameters that can stimulate and reactivate batteries that have fallen below traditional charging thresholds. The pulsed action can break through sulfation and other degradation effects that prevent traditional chargers from recovering dead batteries. By using controlled current pulses, the system can revive batteries that conventional continuous charging methods cannot handle, extending the usable life and reliability of the battery.
4Productivity
If pulse charging is applied to improve charging efficiency, then charging speed increases, but the system becomes more complex compared to traditional continuous charging
Solution Approach 1:
The controller is designed to perform multiple functions: it generates pulsed current, controls pulse timing and frequency, monitors battery state, and manages the charging process. By integrating these functions into a single multi-functional controller, the system achieves high charging efficiency through pulsed action without proportionally increasing overall system complexity. The controller handles both the power delivery and the control logic, making the pulsed charging system practical and manageable.
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 significantly improves charging efficiency by aligning electrons within the battery for better charge reception, reducing charging time and extending battery life, even for batteries that have lost capacity.
Implementation Method 1
converting, by the regenerative braking system, mechanical energy from braking of the vehicle into electrical energy
Implementation Method 2
storing the electrical energy in a bank of capacitors
Implementation Method 3
generating, by a pulsing circuit and from at least a portion of the electrical energy stored in the bank of capacitors, a series of current pulses at a frequency that corresponds to a resonant frequency of the battery
Data Source
AI summary
The inventive subject matter provides systems and methods for efficiently charging a battery of a vehicle using a regenerative braking system. In one aspect of the invention, the battery charging system includes a regenerative braking system that is configured to convert mechanical energy from braking of the vehicle into electrical energy. The battery charging system also includes a bank of capacitors that is configured to store the electrical energy generated by the regenerative braking system. The battery charging system also includes a circuit that is configured to feed into the battery at least a portion of the electrical energy stored in the bank of capacitors as a series of current pulses at a frequency that corresponds to a resonant frequency of the battery. The series of pulses includes constructive resonant ringing that is constructive with respect to charging the battery.