Power Supply System with Dynamic Energy Storage Control
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Solution Overview
Problem
Existing power supply systems for electric vehicles fail to effectively manage the temperature and state of charge of energy storage devices, leading to inefficient power distribution and accelerated deterioration of batteries and capacitors.
Innovation Solution
A power supply system comprising a first energy storage device with high energy density and a second energy storage device with high power density, along with a power transmission circuit and control device that acquires and adjusts the remaining capacity and temperature of the second energy storage device to maintain it within a target range, optimizing power transmission among the load, first energy storage, and second energy storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power is supplied from both battery and capacitor without temperature and SOC management, then power supply capability is improved, but energy storage device deterioration accelerates
Solution Approach 1:
The control device continuously monitors the temperature and state of charge (SOC) of the capacitor, and adjusts the power distribution ratio between battery and capacitor based on this feedback. When capacitor temperature or SOC deviates from optimal ranges, the control device modifies the power allocation to prevent deterioration while maintaining power supply capability.
Solution Approach 2:
The power distribution ratio between battery and capacitor is made dynamic rather than fixed. The control device adjusts the capacitor's power distribution ratio in real-time based on its temperature and SOC conditions, allowing the system to adapt to changing operational states and prevent energy storage device deterioration.
2Speed
If capacitor power distribution ratio is increased for rapid power response, then response speed is improved, but capacitor temperature increases and deterioration accelerates
Solution Approach 1:
The control device uses temperature feedback from the capacitor to dynamically adjust the power distribution ratio. When capacitor temperature rises above optimal levels, the control device reduces the capacitor's power distribution ratio to limit temperature increase, while still maintaining adequate power response capability through coordinated battery power supply.
3Productivity
If power distribution between battery and capacitor is not optimized, then system complexity is reduced, but power supply efficiency decreases
Solution Approach 1:
The control device optimizes power supply efficiency by dynamically adjusting the capacitor's power distribution ratio based on its temperature and SOC parameters. This parameter-based control approach achieves efficient power distribution while maintaining manageable system complexity through clear control logic.
Data Source
AI summary
A power supply system includes a first energy storage, a second energy storage, a power transmission circuit, and circuitry. The circuitry is configured to acquire a remaining capacity and a temperature of the second energy storage. The circuitry is configured to determine a target remaining capacity range of the second energy storage in accordance with the temperature. The circuitry is configured to control the power transmission circuit to control power transmission among the electric load, the first energy storage, and the second energy storage such that the remaining capacity of the second energy storage is within the target remaining capacity range.