Battery Pack Auxiliary Power Activation Paths
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Solution Overview
Problem
The reliability of energy storage systems is compromised when auxiliary power supplies, typically external batteries, run out of electricity or expire, preventing the activation of the energy storage system.
Innovation Solution
A battery pack design with multiple unilateral conduction components and a direct current converter that activates the auxiliary power supply circuit through multiple paths, ensuring continued operation even if one path fails, and includes a direct current converter for voltage conversion and charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external battery is used as auxiliary power supply, then the auxiliary power supply circuit can be activated, but the reliability of the energy storage system is reduced when the battery runs out of electricity or expires
Solution Approach 1:
The energy storage system uses itself to activate the auxiliary power supply circuit. The controller directs the power supply module to output voltage to the auxiliary power supply circuit when the switch is in the second state, eliminating dependence on external batteries and enabling the system to self-activate without external power sources.
2Reliability
If a single activation path is used for the auxiliary power supply circuit, then the device complexity is reduced, but the reliability is compromised when that path fails
Solution Approach 1:
The system employs a dynamic switching mechanism where the controller can direct power through different paths based on system state. The switch between first and second states enables flexible activation of the auxiliary power supply circuit, providing redundancy without permanent dual-path complexity.
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
Ensures reliable activation and operation of the auxiliary power supply circuit, enhancing the reliability of the energy storage system by providing redundant activation paths and efficient voltage conversion.
Implementation Method 1
a first unilateral conduction component and a second unilateral conduction component... a conduction electrode of the first unilateral conduction component is configured to receive a first direct current signal, a conduction electrode of the second unilateral conduction component is configured to receive a second direct current signal
Implementation Method 2
the direct current converter is further connected to the cell, and the direct current converter is further configured to connect to a direct current bus... the direct current converter can convert a battery voltage of the cell into a discharge voltage and output the discharge voltage
Data Source
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AI summary
Embodiments of this application disclose a battery pack, an energy storage system, and a power supply method. A first unilateral conduction component is disposed in the battery pack, and the first unilateral conduction component serves as an activation path to activate an auxiliary power supply circuit. In addition, a second unilateral conduction component is further disposed in the battery pack, and the second unilateral conduction component serves as another activation path to activate the auxiliary power supply circuit. With this arrangement, a voltage source for activating a power conversion unit may be input through a plurality of activation paths. If a voltage for activating the auxiliary power supply circuit cannot be input through one of the activation paths, the voltage for activating the auxiliary power supply circuit can be input through another activation path, to ensure that the auxiliary power supply circuit can be activated to operate, and improve reliability of the energy storage system.