Base Station Battery Reverse Connection Protection Circuit
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Solution Overview
Problem
Large-medium-sized base station power supply systems lack effective protection against reverse battery connections, which can cause transient currents and damage to storage batteries and devices, as conventional diode-based and MOS transistor-controlled circuits are not applicable in these systems.
Innovation Solution
A control circuit comprising a normally-open contactor, relays, diodes, and a controller is designed to prevent reverse connections by controlling the connection and disconnection of battery packs, utilizing a diode-based protection mechanism to ensure safe operation and protect against reverse faults.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional diode-based or MOS transistor-controlled circuits are used for reverse connection protection, then the circuit structure is simple, but these circuits cannot be applied to large-medium-sized base station power supply systems due to transient current damage
Solution Approach 1:
The protection circuit is segmented into multiple independent components: a control circuit that detects reverse connections, a controllable switch (contactor) that physically disconnects the battery, and auxiliary relays that provide backup protection. This segmentation allows the system to handle large currents by distributing functions across multiple specialized components rather than relying on a single protection device.
Solution Approach 2:
The patent introduces a controllable switch (contactor) as an intermediary component between the battery and the power supply system. This intermediary can be controlled to open or close the circuit based on detection signals from the control circuit, providing reliable protection against reverse connections while allowing normal operation when correctly connected.
2Reliability
If a controllable switch-based protection circuit is implemented, then reverse connection protection is effective, but the device complexity increases
Solution Approach 1:
The control circuit performs preliminary detection of battery connection polarity before allowing power supply operation. The detection circuit checks the connection status and activates the controllable switch only when correct connection is confirmed, preventing reverse connection damage before it can occur.
Solution Approach 2:
The system implements feedback through the control circuit that continuously monitors battery connection status and provides control signals to the controllable switch and auxiliary relays. This feedback mechanism ensures the protection circuit responds dynamically to connection changes, maintaining system safety while automating the protection process.
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
The control circuit effectively prevents device damage by automatically disconnecting the battery pack during reverse connections, ensuring reliable operation of the base station power supply system and protecting both the battery pack and system components.
Implementation Method 1
a first diode, a second diode, a third diode
Implementation Method 2
a normally-open contactor, a first normally-open relay, a second normally-open relay
Data Source
Figure 1
AI summary
A control circuit for preventing a battery group (101) from being reversely connected includes a normally-open contactor (102), a first normally-open relay (103), a first diode (104), a second diode (105), a second normally-open relay (106), a third diode (107) and a controller (111). By sending a control command, the controller (111) controls the control coil of the second normally-open relay (106) to work or not to work, thus controls the normally-open contactor (102) to turn on or off, so that the battery group (101) being protected can be connected with or disconnected from a power supply system for a base station. The power supply system for a base station is also provided. With the control circuit, the battery group can be automatically connected to or disconnected from the power supply system for the base station, and a battery group with medium or high capacity can be disconnected from the power supply system in time when the battery group is reversely connected, thus protecting the system.