Battery Controller Wake-Up Path for Black Start and Power Control
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Solution Overview
Problem
Existing battery control systems face challenges in simultaneously performing black start and power control functions due to conflicting operational states of the external control device and battery controller, particularly during grid outages or high power consumption periods.
Innovation Solution
A battery control apparatus and method that includes a power supply, driver circuit, switch, and control unit to manage power transitions during a preset starting time, allowing for efficient black start and power control without switching the breaker state, utilizing a low voltage signal to wake up the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the external control device controls the ESS to sleep mode to minimize power consumption, then power consumption is reduced, but the ability to perform black start function is lost
Solution Approach 1:
The control apparatus is divided into two independent control paths: one for normal power control (external control device to battery controller) and another for black start function (battery controller self-activation). This segmentation allows both functions to operate independently without conflict, resolving the contradiction between power saving mode and black start capability.
Solution Approach 2:
The battery controller is designed with preliminary activation capability that operates independently of the external control device. During grid outage, the battery controller can automatically activate first (black start), establishing power supply before the external control device resumes operation. This preliminary action ensures black start function is available even when the system was in sleep mode.
2Reliability
If the breaker is switched off during grid outage, then power isolation is achieved, but the battery control apparatus cannot be activated for black start
Solution Approach 1:
A control signal transmission path is established that can operate independently of the breaker's main power switching function. The battery controller receives activation signals through this intermediary path even when the breaker is off, allowing black start activation without requiring breaker operation. This intermediary mechanism decouples the power isolation function from the activation function.
3Ease of operation
If the external control device is required to be operable to control ESS power, then power control function is available, but black start function cannot be implemented
Solution Approach 1:
The control system is designed with dynamic role assignment: normally the external control device controls the battery controller for power management, but during grid outage the battery controller dynamically becomes autonomous and activates itself for black start. This dynamic switching of control authority allows both functions to coexist without conflict.
Solution Approach 2:
The battery controller is equipped with self-activation capability that allows it to wake up and initiate black start procedure autonomously without requiring the external control device to be operable. This self-service feature ensures black start function can be implemented independently, resolving the contradiction with normal power control requirements.
Data Source
AI summary
A battery control apparatus may include a power supply unit connected to a charging and discharging path of a battery, a driving unit configured to operate the power supply unit by applying a starting power to the power supply unit during a preset starting time from the charging and discharging path, a switching unit connected between the charging and discharging path of the battery and the power supply unit, and a control unit configured to turn on the switching unit in response to that a first operation power output from the power supply unit is applied, and to be driven through a second operation power generated by the power supply unit after the starting time.