Hybrid Energy Charge Controller for Electric Vehicle Braking
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Solution Overview
Problem
Conventional energy recovery systems for electric vehicles face inefficiencies due to the small capacity of capacitors and high costs of ultra-capacitors, leading to incomplete kinetic energy recycling and reduced comfort, necessitating a low-cost, high-efficiency energy charge control system.
Innovation Solution
An energy charge controller with an estimation module and control module that evaluates driver behavior and vehicle conditions to optimize energy storage and distribution, using a power divider to assign electric power efficiently between storage elements and loads based on situational conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If capacitors with large charge rate are used for energy recovery, then charging speed is improved, but capacity is reduced leading to incomplete kinetic energy recycling
Solution Approach 1:
The patent divides the energy storage function into two separate components: capacitors for high-speed charging and storage batteries for large-capacity storage. This segmentation allows each component to specialize in its strengths, resolving the contradiction between charging speed and capacity.
Solution Approach 2:
The patent combines capacitors and storage batteries into a hybrid energy storage system where both components work together. The capacitor handles rapid charging during braking, while the storage battery provides supplementary storage capacity, achieving both high charging speed and sufficient capacity.
2Productivity
If ultra-capacitors are used for energy recovery, then energy recycling efficiency is improved, but cost, weight and volume increase excessively
Solution Approach 1:
The patent replaces expensive ultra-capacitors with a more economical combination of standard capacitors and storage batteries. This substitution achieves similar energy recovery functionality while significantly reducing cost and weight.
Solution Approach 2:
The patent creates a composite energy storage system combining capacitor and storage battery technologies. This composite approach leverages the advantages of both technologies to achieve effective energy recovery without the excessive weight and cost of ultra-capacitors.
3Quantity of substance
If capacitors are fully charged with only capacitors working in the system, then energy storage is achieved, but electric braking capability is lost affecting passenger comfort
Solution Approach 1:
The patent implements a control system that continuously monitors the charge state of the capacitor and dynamically adjusts the energy management strategy. When the capacitor approaches full charge, the system activates the storage battery to continue absorbing energy, preventing loss of braking capability.
Solution Approach 2:
The patent creates a dynamic energy management system that adaptively switches between capacitor-only mode and hybrid mode based on real-time conditions. This dynamic adjustment ensures continuous braking capability while maximizing energy recovery efficiency.
4Reliability
If braking power is reduced in advance to prevent capacitor overflow, then system safety is maintained, but kinetic energy recovery efficiency decreases significantly
Solution Approach 1:
The patent pre-charges the storage battery before the capacitor becomes full, creating a secondary energy absorption pathway in advance. This preliminary action prevents kinetic energy loss by ensuring continuous energy acceptance capability throughout the braking process.
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
Enhances energy recovery efficiency, extends the life of energy storage devices, reduces fuel consumption, and improves passenger comfort by adaptively managing energy distribution and storage.
Implementation Method 1
recycling electric energy generated from barking of the electric vehicles to a rechargeable battery
Data Source
AI summary
An energy charge controller for controlling electrical energy of a vehicle includes an estimation module and a control module. The estimation module includes a driver behavior judgment unit, a charge curve adjustment unit and an energy charge evaluation unit. The driver behavior judgment unit is configured to generate and output a driving mode signal. The driving mode signal is evaluated to generate a brake charging target datum by the charge curve adjustment unit. The brake charging target datum and a vehicle speed are evaluated to generate a chargeable braking energy value by the energy charge evaluation unit. The control module is configured to store a plurality of situational conditions, and select and output one of the situational conditions to the vehicle by comparing the chargeable braking energy value and a recoverable storage power value from an energy storage device.