CN-122026589-A - Uninterruptible power supply, uninterruptible power supply system, and uninterruptible power supply control method
Abstract
The application provides an uninterruptible power supply, an uninterruptible power supply system and a control method of the uninterruptible power supply, wherein the uninterruptible power supply comprises an energy storage device, a first on-off control device and an electric energy conversion circuit, the first on-off control device is in a communication state when the electric energy conversion circuit inputs external electric energy, the energy storage device is communicated with the electric energy conversion circuit, the first on-off control device is in a disconnection state when the electric energy conversion circuit stops inputting the external electric energy, and the energy storage device is disconnected with the electric energy conversion circuit, wherein the communication state or the disconnection state of the first on-off control device is controlled by the external electric energy. In this mode, this first on-off control device's break-make receives the control of outside electric energy, and when uninterrupted power source outage back, first on-off control device disconnection to make energy storage device and electric energy conversion circuit disconnection, need not manual operation, the reliability is higher, can effectively improve energy storage device's in the uninterrupted power source life.
Inventors
- LIU MENGWEI
- ZHAO LIKUN
- NIU ZHENG
Assignees
- 阳光电源股份有限公司
Dates
- Publication Date
- 20260512
- Application Date
- 20241030
Claims (15)
- 1. The uninterruptible power supply is characterized by comprising an energy storage device, a first on-off control device and an electric energy conversion circuit, wherein the energy storage device, the first on-off control device and the electric energy conversion circuit are sequentially connected in series; When the electric energy conversion circuit inputs external electric energy, the first on-off control device is in a communication state, and the energy storage device is communicated with the electric energy conversion circuit; When the electric energy conversion circuit stops inputting the external electric energy, the first on-off control device is in an off state, and the energy storage device is disconnected with the electric energy conversion circuit, wherein the on-state or the off state of the first on-off control device is controlled by the external electric energy.
- 2. The uninterruptible power supply of claim 1, wherein the first on-off control means comprises a time delay on-off control means; And the external electric energy stops supplying power to the first on-off control device, and stops supplying power to the first on-off control device for a preset duration, and the first on-off control device is switched from the on state to the off state.
- 3. The uninterruptible power supply of claim 1, further comprising a charging circuit therein; And when the voltage of the energy storage device does not meet the preset voltage condition, controlling the energy storage device to be communicated with the charging circuit so as to charge the energy storage device through the charging circuit.
- 4. The uninterruptible power supply of claim 3, wherein a second on-off control means is provided between the energy storage means and the first on-off control means; When the uninterruptible power supply is started, the second on-off control device is communicated with the first on-off control device, the energy storage device is communicated with the electric energy conversion circuit, and the energy storage device is charged through the electric energy conversion circuit; when the voltage of the energy storage device does not meet the preset voltage condition, the second on-off control device is disconnected with the first on-off control device, and the second on-off control device is communicated with the charging circuit.
- 5. The uninterruptible power supply of claim 4, wherein the second on-off control means comprises a switch comprising a plurality of contacts; the energy storage device, the first on-off control device and the charging circuit are connected with different contacts; when the uninterruptible power supply is started, the energy storage device is communicated with a contact connected with the first on-off control device, and the energy storage device is disconnected with a contact connected with the charging circuit; When the voltage of the energy storage device does not meet the preset voltage condition, the energy storage device is disconnected with the contact connected with the first on-off control device, and the energy storage device is communicated with the contact connected with the charging circuit.
- 6. The uninterruptible power supply of claim 3, wherein the charging circuit is connected to the external power or to a bus of the uninterruptible power supply.
- 7. The uninterruptible power supply of any of claims 1 to 6, wherein a third switching control means is further provided between the energy storage means and the electrical energy conversion circuit; When the electric energy conversion circuit stops inputting the external electric energy, the third switching-off control device is controlled to be communicated so that the energy storage device is communicated with the electric energy conversion circuit, and the energy storage device outputs stored electric energy to the electric energy conversion circuit.
- 8. An uninterruptible power supply system, characterized in that the system comprises the uninterruptible power supply of any one of claims 3-5, and further comprises a controller, wherein the controller is connected with an energy storage device in the uninterruptible power supply and is used for collecting the voltage of the energy storage device; The controller is also connected with a second on-off control device in the uninterrupted power supply and used for controlling the on-off state of the second on-off control device.
- 9. A method for controlling an uninterruptible power supply, the method comprising: When the electric energy conversion circuit of the uninterruptible power supply inputs external electric energy, the first on-off control device of the uninterruptible power supply is controlled to be communicated so that the energy storage device is communicated with the electric energy conversion circuit; when the electric energy conversion circuit stops inputting the external electric energy, the first on-off control device is controlled to be disconnected so as to disconnect the energy storage device from the electric energy conversion circuit, wherein the connection or disconnection of the first on-off control device is controlled by the external electric energy.
- 10. The method according to claim 9, wherein the step of controlling the first on-off control device to be turned off when the power conversion circuit stops inputting the external power, comprises: When the electric energy conversion circuit stops inputting the external electric energy, counting the duration of stopping supplying power to the first on-off control device; and when the duration reaches the preset duration, controlling the first on-off control device to be disconnected.
- 11. The method according to claim 9, wherein the method further comprises: When the uninterruptible power supply is started, a first on-off control device and a second on-off control device in the uninterruptible power supply are controlled to be communicated, so that an energy storage device in the uninterruptible power supply is communicated with the electric energy conversion circuit, and the energy storage device is charged through the electric energy conversion circuit; Detecting a voltage of the energy storage device; When the voltage of the energy storage device does not meet the preset voltage condition, the second on-off control device is controlled to be communicated with the charging circuit so as to charge the energy storage device through the charging circuit, wherein the charging voltage provided by the charging circuit to the energy storage device is larger than the charging voltage provided by the electric energy conversion circuit to the energy storage device.
- 12. The uninterruptible power supply of claim 11, wherein the predetermined voltage condition includes a voltage of the energy storage device reaching a predetermined voltage for a predetermined charge duration when the energy storage device is charged by the power conversion circuit.
- 13. The method of claim 11, wherein the method further comprises: And when the voltage of the energy storage device is not detected, generating alarm information of failure of the energy storage device.
- 14. The method of claim 11, wherein after the step of controlling the second on-off control device to communicate with the charging circuit to charge the energy storage device through the charging circuit, the method further comprises: When the voltage of the energy storage device meets a preset voltage condition, the second on-off control device is controlled to be communicated with the first on-off control device, so that the energy storage device is communicated with the electric energy conversion circuit.
- 15. The method of claim 11, wherein after the step of controlling the second on-off control device to communicate with the charging circuit to charge the energy storage device through the charging circuit, the method further comprises: And when the voltage of the energy storage device does not meet the preset voltage condition, generating alarm information of failure of the energy storage device.
Description
Uninterruptible power supply, uninterruptible power supply system, and uninterruptible power supply control method Technical Field The application relates to the technical field of electric power, in particular to an uninterruptible power supply, an uninterruptible power supply system and a control method of the uninterruptible power supply. Background The uninterruptible power supply (Uninterruptible Power Supply, abbreviated as UPS) comprises a battery and an electric energy conversion circuit such as a rectifier, an inverter and the like. When the UPS is stopped, the battery can be discharged through the electric energy conversion circuit, and after the battery is discharged to be lower than a certain voltage threshold value, the battery cannot be continuously charged for use. In the related art, in order to avoid discharging the battery, the connection between the battery and the electric energy conversion circuit is usually disconnected by manual operation, and this method is cumbersome to operate and has low reliability. Disclosure of Invention Accordingly, the present application is directed to an uninterruptible power supply, an uninterruptible power supply system, and a control method of the uninterruptible power supply, which do not require manual operation and have high reliability. In a first aspect, the embodiment of the application provides an uninterruptible power supply, which comprises an energy storage device, a first on-off control device and an electric energy conversion circuit, wherein the energy storage device, the first on-off control device and the electric energy conversion circuit are sequentially connected in series, when external electric energy is input into the electric energy conversion circuit, the first on-off control device is in a communication state, the energy storage device is communicated with the electric energy conversion circuit, when the electric energy conversion circuit stops inputting the external electric energy, the first on-off control device is in a disconnection state, the energy storage device is disconnected with the electric energy conversion circuit, and the communication state or the disconnection state of the first on-off control device is controlled by the external electric energy. The first on-off control device comprises a time delay on-off control device, external electric energy stops supplying power to the first on-off control device, and the power supply to the first on-off control device is stopped for a preset time period, and the first on-off control device is switched from a connected state to a disconnected state. The uninterruptible power supply further comprises a charging circuit, and when the voltage of the energy storage device does not meet the preset voltage condition, the energy storage device is controlled to be communicated with the charging circuit so as to charge the energy storage device through the charging circuit. A second on-off control device is arranged between the energy storage device and the first on-off control device, when the uninterruptible power supply is started, the second on-off control device is communicated with the first on-off control device, the energy storage device is communicated with the electric energy conversion circuit, the energy storage device is charged through the electric energy conversion circuit, and when the voltage of the energy storage device does not meet the preset voltage condition, the second on-off control device is disconnected with the first on-off control device, and the second on-off control device is communicated with the charging circuit. The second on-off control device comprises a change-over switch, the change-over switch comprises a plurality of contacts, the energy storage device, the first on-off control device and the charging circuit are connected with different contacts, when the uninterruptible power supply is started, the energy storage device is communicated with the contacts connected with the first on-off control device, the energy storage device is disconnected with the contacts connected with the charging circuit, and when the voltage of the energy storage device does not meet the preset voltage condition, the energy storage device is disconnected with the contacts connected with the first on-off control device, and the energy storage device is communicated with the contacts connected with the charging circuit. The charging circuit is connected with an external electric energy or a bus of an uninterruptible power supply. A third switching-off control device is further arranged between the energy storage device and the electric energy conversion circuit, when the electric energy conversion circuit stops inputting external electric energy, the third switching-off control device is controlled to be communicated so that the energy storage device is communicated with the electric energy conversion circuit, and the energy storage device outputs stored electric energy