Monorail Hoist Battery Management With Ultracapacitor Energy Buffering
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Solution Overview
Problem
Existing monorail hoist locomotives face issues with high noise, exhaust gas pollution, heavy metal pollution, large size, heavy weight, frequent charging, and rapid capacity attenuation of lead-acid batteries, while lithium-ion batteries have low energy density and rapid energy consumption under complex underground conditions.
Innovation Solution
A high-efficiency lithium battery monorail hoist locomotive with a battery management system that includes a battery unit with ultra capacitors, sensors, and a control module to manage charging and discharging, temperature regulation, and energy recovery, optimizing power output and brake energy recovery under different operation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If lithium-ion batteries are used in monorail hoist locomotives, then energy density and cycle life are improved, but under high-power charging and discharging conditions, capacity attenuates rapidly
Solution Approach 1:
The battery system is segmented into multiple single cells arranged in series, allowing independent monitoring and management of each cell's state of charge. This segmentation enables the battery management system to identify and address capacity attenuation in specific cells without affecting the entire battery pack, thereby maintaining reliability under high-power operation while preserving the long cycle life benefit of lithium-ion batteries
2Power
If monorail hoist locomotive operates under high-power charging and discharging conditions, then power output is improved, but energy consumption increases and capacity attenuates rapidly
Solution Approach 1:
The battery management system continuously monitors the state of charge of each single cell and provides feedback control. Based on this feedback, the system dynamically adjusts charging and discharging parameters to optimize power output while minimizing energy consumption and preventing rapid capacity attenuation, enabling the locomotive to maintain high power output efficiently
Solution Approach 2:
The battery management system dynamically adjusts operating parameters based on real-time conditions, transitioning between different power delivery modes. This dynamic control allows the system to maximize power output when needed while conserving energy during normal operation, resolving the contradiction between power output and energy consumption
3Power
If lead-acid batteries are used in monorail hoist locomotives, then power supply is provided, but batteries have large size, heavy weight and frequent charging requirements
Solution Approach 1:
The invention changes the fundamental parameter of battery chemistry from lead-acid to lithium-ion, which fundamentally alters the energy density and weight characteristics. Lithium-ion batteries provide the same power supply capability with significantly reduced weight, directly resolving the contradiction between power supply capability and battery weight
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 utilization, extends battery life, and improves transportation efficiency by dynamically managing lithium battery operations and implementing brake energy recovery, ensuring safe and efficient underground travel.
Implementation Method 1
the battery unit includes a battery management system, an ultra capacitor and a battery pack formed by a plurality of single cells
Implementation Method 2
the ultra capacitor and the battery pack are controlled by the battery management system to charge and discharge
Implementation Method 3
The voltage sensor is configured to monitor a voltage of the single cells, the current sensor is configured to monitor a current of the single cells
Implementation Method 4
The temperature sensor is configured to monitor a temperature of the single cells. When the average temperature value T is less than the minimum starting temperature Tmin, the single cells is heated by the heater
Data Source
AI summary
A high-energy-efficiency lithium battery monorail hoist locomotive includes a driving unit, a battery unit and a bearing trolley. The bearing trolley bears cargoes, the battery unit outputs the power to the driving unit, and the driving unit drives the locomotive to move. The battery unit includes a battery management system (BMS), an ultra capacitor and a battery pack formed by single cells. The BMS obtains the minimum state of charge difference value ΔSOCmin between the single cells, the state of charge SOCn of each single cells, the maximum state of charge SOCmax among the single cells and the minimum state of charge SOCmin among the single cells. The ultra capacitor and the battery pack are controlled by the BMS to charge and discharge. The charging and discharging of the battery pack are managed by the BMS, and the ultra capacitor plays a buffering role in the charging and discharging process.