Motor Winding Charge-Discharge Control for Abnormal Current Detection
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Solution Overview
Problem
Existing power battery charging and discharging systems lack a solution for handling abnormal current conditions, leading to safety hazards due to excessive currents during low temperature operations.
Innovation Solution
A method and apparatus for controlling a charge and discharge circuit that includes acquiring current values through a neutral line and individual windings, determining if the current state is normal, and reducing power if abnormal, using a current detection module and power control module to ensure safe operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power battery heating is performed at excessively low temperature, then the power battery can operate normally, but abnormal current conditions occur leading to safety hazards
Solution Approach 1:
The control method performs preliminary detection of current values before heating operation proceeds, checking whether current values are within preset ranges. This preliminary action prevents abnormal current conditions from developing into safety hazards by detecting and responding to current anomalies before they cause harm.
Solution Approach 2:
The system continuously detects current values flowing through the heating circuit and feeds this information back to the control unit. Based on the feedback, the control unit adjusts the heating operation by controlling the charge and discharge circuit, thereby maintaining current values within safe ranges and preventing abnormal current conditions.
2Reliability
If current detection and control measures are implemented, then safety hazards are reduced, but system complexity increases
Solution Approach 1:
The control unit performs multiple functions using a single integrated component: it controls the charge and discharge circuit, detects current values, determines whether current is abnormal, and adjusts heating operation. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in system complexity while maintaining safety.
Solution Approach 2:
The control system automatically detects current abnormalities and adjusts heating operation without requiring external intervention. The system serves itself by monitoring its own operational parameters and making necessary adjustments to maintain safety, reducing the need for additional complex external monitoring systems.
Data Source
AI summary
The present application discloses a method, apparatus, system, device and storage medium for controlling a charge and discharge circuit. The charge and discharge circuit includes an M-phase motor winding, where M is a positive integer. The method includes: controlling the charge and discharge circuit to start charge and discharge; acquiring a first current value and second current values, where the first current value is a current value flowing through a neutral line of the M-phase motor winding, and the second current value is a current value flowing through a single winding; determining whether a current charge and discharge state is normal according to the first current value and the second current values; and if not, controlling the charge and discharge power to be reduced.