Shared battery circuit and uninterruptible power supply system
A power supply and circuit technology, applied in the field of uninterruptible power supply systems, can solve the problem of low reliability and achieve the effect of improving reliability
Inactive Publication Date: 2011-12-14
SHENZHEN INOVANCE TECH
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a shared battery circuit and an uninterruptible power supply system for the problem of low reliability caused by the direct connection of multiple inverter power supplies or uninterruptible power supply DC buses when sharing the battery
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[0022] In the present invention, a unidirectional conduction unit that conducts unidirectionally from the positive pole of the storage battery to the positive pole of the DC bus is added between the DC bus of each uninterruptible power supply or inverter power supply and the battery in the uninterruptible power supply system, so that multiple uninterruptible power supplies or inverters There is no direct connection between the DC bus bars of the variable power supply, which avoids the failure of a certain uninterruptible power supply or inverter power supply to cause power failure of all uninterruptible power supplies or inverter power supplies.
[0023] like figure 2 Shown is a schematic diagram of an embodiment of the shared battery circuit of the present invention (the switch is omitted in this figure). In this embodiment, the circuit includes a battery 23, a first uninterruptible power supply 21 and a second uninterruptible power supply 22, wherein the positive pole of th...
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The invention relates to a shared battery circuit, comprising a storage battery and at least two inverter power supplies or uninterruptible power supplies, the positive poles of the DC bus bars of the at least two inverter power supplies or uninterruptible power supplies are respectively connected to the storage battery via a unidirectional conduction unit The positive pole of the DC bus bar is respectively connected to the negative pole of the storage battery, and the unidirectional conduction unit conducts unidirectionally from the positive pole of the storage battery to the positive pole of the inverter power supply or the uninterruptible power supply. The present invention also provides an uninterruptible power supply system comprising the above shared battery circuit. In the present invention, a unidirectional conduction unit that is unidirectionally conducted from the positive pole of the storage battery to the positive pole of the DC bus is added between the DC bus of each inverter power supply or uninterruptible power supply and the storage battery, so that the DC bus of multiple inverter power supplies or uninterruptible power supplies There is no direct connection between them, which avoids the failure of a certain inverter power supply to cause power failure of all inverter power supplies or uninterruptible power supplies.
Description
technical field [0001] The present invention relates to an uninterruptible power supply system, and more specifically, relates to a shared battery circuit and an uninterruptible power supply system. Background technique [0002] An uninterruptible power system (UPS) is an important external device that can provide continuous, stable and uninterrupted power supply for important equipment. The DC power supply part (battery pack) in the UPS is in a charging state when the mains power supply is normal. Once the mains power is interrupted, the DC power supply part immediately outputs the stored DC power to the load to maintain the continuity of power supply to the load. [0003] In UPS equipment for powering motors (such as elevators), in order to improve capacity and reliability, there are usually multiple uninterruptible power supplies (or inverter power supplies) used in parallel. As for the battery used as the DC power supply part in the UPS equipment, one battery can be eq...
Claims
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IPC IPC(8): H02J7/34H02J7/02H02J3/08H02J9/00
Inventor 刘玉伟柏子平
Owner SHENZHEN INOVANCE TECH