Battery charger, direct current charging anti-backflow device and control method
A technology of DC charging and anti-reverse charging, applied in battery circuit devices, circuit devices, current collectors, etc., can solve the problem of large power consumption of diodes, achieve the effects of low power consumption, improve charging efficiency, and reduce overall power consumption
Inactive Publication Date: 2017-05-24
XJ POWER CO LTD +4
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Problems solved by technology
[0004] The purpose of the present invention is to provide a DC charging anti-backfeed device to solve the problem of large power consumption of the diode when the charging current is large
Method used
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[0020] Example of charger
[0021] Such as figure 2 As shown, the charger is connected with the storage battery to provide electric energy for the storage battery. Among them, the charger includes a charger body, a charging circuit, and a DC charging anti-backfeed device. The charger body includes a high-frequency rectification circuit, which can be full-wave rectification, full-bridge rectification, synchronous rectification, and voltage doubler rectification. Or is their structural deformation. Since the charger body belongs to conventional technology, it will not be described in detail here. The specific composition and working process of the DC charging anti-backfeed device are described below.
[0022] The charger body has two DC voltage output terminals, and the battery has two charging terminals. The DC voltage output terminal of the charger is connected to one end of the charging circuit, and the charging terminal of the battery is connected to the other end of the...
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The invention relates to a battery charger, a direct current charging anti-backflow device and a control method. An electric control switch tube is in homonymous parallel connection with a diode of a charging circuit; when an output voltage of a charging device is more than a battery voltage, a storage battery is controlled to charge; the power consumption of the diode is less under a small current condition, so that the diode can be utilized to realize the charging conduction when the charging current is small; when the charging current is large, the power consumption of the diode is higher, so that the switch tube is controlled to conduct; and the conducting impedance of the switch tube is tiny, the diode is short-circuited after the switch tube is conducted, no power consumption is generated by the diode and the switch tube is low in power consumption due to low impedance, so that the power consumption of the switch tube is low under a large current condition, the overall power consumption of the device is reduced and the charging efficiency is increased.
Description
technical field [0001] The invention relates to a charger, a DC charging anti-backfeed device and a control method. Background technique [0002] In recent years, the use of DC chargers to charge batteries has become more and more widely used. When the existing DC charger is charging the storage battery, its output positive and negative busbars need to be connected with the storage battery. In this way, when the voltage of the battery is higher than that of the DC charger, the battery will reversely charge the capacitor inside the charger, which will easily cause the charger to fail for a long time. Especially when the DC charger is connected to the battery, it will cause the battery to generate a huge current or arc in an instant. In severe cases, it may cause a fire. Therefore, it is necessary to add an anti-backfeed circuit at the output of the charger to prevent such hidden dangers. [0003] The existing technology generally uses diodes as anti-backflow devices, such a...
Claims
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CPCH02J7/0029Y02E60/10
Inventor 尹强熊泽成赵启良罗治军于越庞浩任晓丹于海斌李国柱
Owner XJ POWER CO LTD