外文翻譯---光伏系統(tǒng)中蓄電池的充電保護ic電路設(shè)計(編輯修改稿)
2025-01-08 22:29 本頁面
【文章內(nèi)容簡介】 drops to a lower float voltage VF. Protection Module Chip block diagram of the internal protection circuit shown in Figure 3. The circuit includes control logic circuit, sampling circuit, overcharge detection circuit, overdischarge detection parator, overcurrent detection parator, load shortcircuit detection circuit, levelshifting circuit and reference circuit (BGR). Figure3 Block diagram of battery protection This module constitutes a protection circuit shown in Figure 4. Under the chip supply voltage within the normal scope of work, and the VM pin voltage at the overcurrent detection voltage, the battery is in normal operation, the charge and discharge control of the chip high power end of the CO and DO are level, when the chip is in normal working mode. Larger when the battery discharge current will cause voltage rise of the VM pin at the VM pin voltage at above the current detection voltage Viov, then the battery is the current status, if this state to maintain the tiov overcurrent delay time, the chip ban on battery discharge, then the charge to control the end of CO is high, the discharge control side DO is low, the chip is in the current mode, general in order to play on the battery safer and more reasonable protection, the chip will battery overdischarge current to take over the discharge current delay time protection. The general rule is that the overdischarge current is larger, over the shorter the discharge current delay time. Above Overcharge detection voltage, the Sampling circuit Over discharge detection parator Control logic circuit Level conversion circuit Overcharge detection parator Overcurrent detection parator2 Overcurrent detection parator1 Overcurrent detection circuit Load short detection circuit 湖北科技學(xué)院本科畢業(yè)論文（設(shè)計）：外文翻譯 5 chip supply voltage (Vdd Vcu), the battery is in overcharge state, this state is to maintain the corresponding overcharge delay ti me tcu chip will be prohibited from charging the battery, then discharge control end DO is high, and charging control terminal CO is low, the chip is in charging mode. When the supply voltage of the chip under the overdischarge detection voltage (Vdd Vdl,), then the battery is discharged state, this state remains the overdischarge delay time tdl chip will be prohibited to discharge the battery at this time The charge control side CO is high, while the discharge control terminal DO is low, the chip is in discharge mode. Figure4 Protection circuit application schematic diagram Design Two charge protection module structure diagram, the circuit can be divided into four parts: the power detection circuit (undervoltage detection circuit), part of the bias circuit (sampling circuit, the reference circuit and bias circuit), the parator (including the overcharge detection /overdischarge detection parator, overcurrent detection and load shortcircuit detection circuit) and the logic control part. This paper describes the undervoltage detection circuit (Figure 5), and gives the bandgap reference circuit (Figure 6). Protection module 湖北科技學(xué)院本科畢業(yè)論文（設(shè)計）：外文翻譯 6 Figure5 Undervoltage detection circuit Figure6 A reference power supply circuit diagram Battery charging, voltage stability is particularly important, undervoltage, overvoltage protection is essential, therefore integrated overvoltage, undervoltage protection circuit inside the chip, to improve power supply reliability and security. And protection circuit design should be simple, practical, here designed a CMOS process, the undervoltage protection circuit, this simple circ
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