Bidirectional Battery Switching Circuit for Abnormal Discharge Prevention
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Solution Overview
Problem
Backup battery units in data centers can discharge abnormally when the input voltage is lower than their discharge voltage, leading to energy loss and inefficiency.
Innovation Solution
An energy storage device with a bidirectional switching circuit and rectifying circuit that compensates for power shortages and prevents abnormal discharge by using a processor to control the transistors based on input voltage thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the backup battery unit is used to provide backup power, then the instantaneous high-power discharge capability is improved, but the abnormal discharge occurs when input voltage is lower than discharge voltage
Solution Approach 1:
The patent introduces a bidirectional switching circuit as an intermediary between the power line and battery, controlled by a processor. This switching circuit acts as a mediator that prevents direct abnormal discharge while allowing controlled power transfer, resolving the contradiction between maintaining high-power discharge capability and preventing abnormal discharge conditions.
Solution Approach 2:
The processor monitors the input voltage and provides feedback control to the bidirectional switching circuit. When the input voltage drops below the discharge voltage threshold, the processor activates the switching circuit to prevent abnormal discharge. This feedback mechanism ensures reliable operation while preserving the battery's high-power discharge capability under normal conditions.
2Reliability
If the bidirectional switching circuit is turned on to prevent abnormal discharge, then the reliability is improved, but the heat generation increases
Solution Approach 1:
The bidirectional switching circuit operates periodically rather than continuously - it is activated only when the processor detects that input voltage falls below the discharge voltage threshold. This periodic operation prevents abnormal discharge events while minimizing heat generation by keeping the switching circuit off during normal operating conditions.
3Stability of the object's composition
If the rectifying circuit is used to compensate for power shortage, then the power supply stability is improved, but the device complexity increases
Solution Approach 1:
The bidirectional switching circuit serves multiple functions: it prevents abnormal discharge, enables controlled battery discharge to compensate for power shortages, and works in conjunction with the rectifying circuit. This multi-functionality reduces the need for separate dedicated circuits, thereby limiting the increase in device complexity while maintaining power supply stability.
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 device effectively compensates for power shortages, reduces heat generation, and prevents abnormal battery discharge, ensuring stable operation of loads.
Implementation Method 1
The rectifying circuit is configured to be turned on in response to the input voltage being smaller than a voltage threshold, so as to make the battery discharge to the power line through the second transistor and the rectifying circuit
Data Source
AI summary
An energy storage device includes a power line, a battery, a bidirectional switching circuit, a rectifying circuit and a processor. The power line uses an input voltage to supply power to the load. The bidirectional switching circuit includes a first transistor and a second transistor coupled between the power line and the battery in series sequentially. The first transistor and the second transistor are connected in a back-to-back manner. The rectifying circuit turns on when the input voltage is smaller than a voltage threshold to make the battery discharge to the power line through the second transistor and the rectifying circuit. The processor turns on the bidirectional switching circuit when the input voltage is smaller than the voltage threshold, so as to make the battery discharge to the power line through the first transistor and the second transistor.