Capacitor-Assisted Battery Module for Fast AC Regeneration Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional battery systems struggle to respond efficiently to fast changes in charging current, especially at low temperatures, limiting their ability to capture high regeneration pulses during vehicle operation.
Innovation Solution
Incorporating lithium ion capacitors in parallel with lithium ion batteries, utilizing anti-parallel diodes as AC switches to facilitate rapid charging by alternating current sources, allowing capacitors to absorb and redistribute power to batteries efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional battery systems are used, then the system structure is simple, but the system cannot respond efficiently to fast changes in charging current especially at low temperatures
Solution Approach 1:
The patent combines a capacitor and a battery into a single CAB (capacitor-assisted battery) module, where the capacitor and battery work together to provide both fast response capability and energy storage. The capacitor handles rapid current changes while the battery provides sustained power, resolving the contradiction between response speed and system simplicity.
Solution Approach 2:
The CAB module serves multiple functions: the capacitor provides fast response to charging current changes, the battery provides energy storage, and together they enable efficient power redistribution during regeneration events. This multi-functional design improves response speed without requiring entirely separate systems for each function.
2Power
If conventional battery systems are used, then the manufacturing process is simple, but the ability to capture high regeneration pulses is limited
Solution Approach 1:
By merging the capacitor's ability to rapidly absorb power with the battery's energy storage capacity, the CAB module can capture high regeneration pulses that would otherwise be lost. The capacitor acts as a buffer that quickly absorbs regenerative energy and transfers it to the battery, enabling high power capture without complex additional systems.
Solution Approach 2:
The capacitor is pre-charged during normal operation and automatically discharges to assist the battery during regeneration events, providing preliminary energy that enables rapid power capture. This preliminary action by the capacitor allows the system to respond immediately to regeneration pulses without waiting for the battery to charge.
3Use of energy by moving object
If conventional battery systems are used, then the system is easy to operate, but fast charging capability is limited especially at low temperatures
Solution Approach 1:
The capacitor and battery work together in the CAB module to enable fast charging. The capacitor can rapidly accept charging current even at low temperatures and then transfer energy to the battery, overcoming the battery's limited fast charging capability in cold conditions while maintaining a relatively simple system structure.
Solution Approach 2:
The capacitor acts as an intermediary between the charging source and the battery, buffering the charging current and protecting the battery from direct exposure to high-rate charging that would be problematic at low temperatures. This intermediary role enables fast charging capability while preserving battery health and system simplicity.
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 battery system performance by enabling fast charging and power redistribution during high regeneration events, even at low temperatures, improving overall efficiency and responsiveness.
Implementation Method 1
Each of the N CABs of the first CAB block includes a capacitor and a battery connected in parallel with the capacitor
Implementation Method 2
A first diode including an anode and a cathode. A second diode includes an anode and a cathode. The anode of the first diode is connected to the cathode of the second diode at a first node
Implementation Method 3
Each of the N CABs of the first CAB block includes a capacitor and a battery connected in parallel with the capacitor
Data Source
AI summary
A capacitor assisted battery module includes a first diode including an anode and a cathode. A second diode includes an anode and a cathode. The anode of the first diode is connected to the cathode of the second diode at a first node. A first capacitor assisted battery (CAB) block includes a positive terminal, a negative terminal and N CABs, where N is an integer greater than zero. The positive terminal of the first CAB block is connected to the cathode of the first diode. A second capacitor assisted battery (CAB) block includes a positive terminal, a negative terminal and N CABs, wherein the negative terminal of the second CAB block is connected to the anode of the second diode. The negative terminal of the first CAB block and the positive terminal of the second CAB block are connected to a second node.