CN102280922A - Shared battery circuit and uninterrupted power supply system - Google Patents
Shared battery circuit and uninterrupted power supply system Download PDFInfo
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- CN102280922A CN102280922A CN2010101978808A CN201010197880A CN102280922A CN 102280922 A CN102280922 A CN 102280922A CN 2010101978808 A CN2010101978808 A CN 2010101978808A CN 201010197880 A CN201010197880 A CN 201010197880A CN 102280922 A CN102280922 A CN 102280922A
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- power supply
- uninterrupted power
- storage battery
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- inverter
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Abstract
The invention relates to a shared battery circuit which comprises a storage battery and at least two inverter power supplies or uninterrupted power supplies, wherein the anodes of direct current buses of the two inverter power supplies or uninterrupted power supplies are connected to the anode of the storage battery through a one-way conduction unit respectively; the cathodes of the direct current buses are connected to the cathode of the storage battery respectively; and the one-way conduction unit is in one-way conduction from the anode of the storage battery to the anodes of the inverter power supplies or uninterrupted power supplies. The invention also provides an uninterrupted power supply system comprising the shared battery circuit. According to the invention, the one-way conduction unit, which is in one-way conduction from the anode of the storage battery to the anodes of the direct current buses, is arranged between the direct current bus of each inverter power supply or uninterrupted power supply and the storage battery, so that the direct current buses of multiple inverter power supplies or uninterrupted power supplies are not directly connected with one another to avoid the condition that a certain inverter power supply goes wrong to cause all the inverter power supplies or uninterrupted power supplies have power fails.
Description
Technical field
The present invention relates to uninterruptible power system, more particularly, relate to a kind of CB common battery circuit and uninterruptible power system.
Background technology
(uninterruptible power system UPS) is the important external equipment that lasting, stable, continual power supply supply can be provided for visual plant to uninterruptible power system.Direct current supply part (battery pack) among the UPS is in charged state when the civil power normal power supply.In case civil power interrupts, the direct current supply part is exported to load with the direct current that stores immediately, keeps the continuity to electric.
In the UPS equipment that is motor (for example elevator) power supply,, have a plurality of uninterrupted power supplys (or inverter) that use in parallel usually for raising capacity and reliability.For in the UPS equipment as the storage battery of direct current supply part, can be equipped with one respectively for each uninterrupted power supply, also can the shared group storage battery of a plurality of uninterrupted power supplys.And the scheme of the shared group storage battery of a plurality of uninterrupted power supplys is the great convenience that administering and maintaining of storage battery brought.
As shown in Figure 1, be the circuit diagram (this figure only illustrates the example of two shared batteries of uninterrupted power supply, has omitted switch among the figure) of existing shared storage battery scheme.In this example, the dc bus 14,15 of two uninterrupted power supplys 11,12 is directly linked together (as Fig. 1, omitted switch in the circuit), promptly the dc bus of two uninterrupted power supplys 11,12 directly connects, and is connected to the positive pole of a storage battery 13 simultaneously.Above-mentioned uninterrupted power supply 11,12 also can be an inverter.
Though aforesaid way can realize that storage battery is shared, this also will be originally independently two systems be connected in together.When a uninterrupted power supply breaks down, its bus is dragged down, because dc bus connects together, the dc bus of an other uninterrupted power supply discharges by the fault point, its voltage is equally also dragged down, thereby cause second also power down of uninterrupted power supply, lost uninterrupted power supply original redundancy feature in parallel.The reliability of ups power equipment reduces greatly.
Summary of the invention
The technical problem to be solved in the present invention is, thereby causes the not high problem of reliability because the dc bus of a plurality of inverters or uninterrupted power supply directly links to each other during at above-mentioned shared storage battery, and a kind of CB common battery circuit and uninterruptible power system are provided.
The technical scheme that the present invention solves the problems of the technologies described above is, a kind of CB common battery circuit is provided, comprise that storage battery reaches at least two inverters or uninterrupted power supply, the positive pole of the dc bus of described at least two inverters or uninterrupted power supply is connected to the positive pole of storage battery respectively via a unidirectional onunit, the negative pole of described dc bus is connected respectively to the negative pole of storage battery, and described unidirectional onunit is from the positive best inverter of storage battery or the anodal unidirectional conducting of uninterrupted power supply.
In CB common battery circuit of the present invention, also comprise at least two unidirectional gate-controlled switches in parallel with unidirectional onunit respectively, described unidirectional gate-controlled switch disconnects under normal condition and in inverter or uninterrupted power supply closure during to charge in batteries, described unidirectional gate-controlled switch when closure by the anodal unidirectional conducting of the dc bus positive pole of inverter or uninterrupted power supply to storage battery.
In CB common battery circuit of the present invention, described unidirectional onunit is a diode, and described unidirectional gate-controlled switch is a thyristor.
In CB common battery circuit of the present invention, also be serially connected with an insurance unit between the positive pole of each described inverter or uninterrupted power supply dc bus and the positive pole of storage battery, described insurance unit disconnects when overcurrent surpasses the scheduled time.
In CB common battery circuit of the present invention, described insurance unit is a fuse.
The present invention also provides a kind of uninterruptible power system, comprise that storage battery reaches at least two inverters or uninterrupted power supply, the positive pole of the dc bus of described at least two inverters or uninterrupted power supply is connected to the positive pole of storage battery respectively via a unidirectional onunit, the negative pole of described dc bus is connected respectively to the negative pole of storage battery, and described unidirectional onunit is from the positive best inverter of storage battery or the anodal unidirectional conducting of uninterrupted power supply.
In uninterruptible power system of the present invention, also comprise at least two unidirectional gate-controlled switches in parallel with unidirectional onunit respectively, described unidirectional gate-controlled switch disconnects under normal condition and in inverter or uninterrupted power supply closure during to charge in batteries, described unidirectional gate-controlled switch when closure by the anodal unidirectional conducting of the dc bus positive pole of inverter or uninterrupted power supply to storage battery.
In uninterruptible power system of the present invention, described unidirectional onunit is a diode, and described unidirectional gate-controlled switch is a thyristor.
In uninterruptible power system of the present invention, also be serially connected with an insurance unit between the positive pole of each described inverter or uninterrupted power supply dc bus and the positive pole of storage battery, described insurance unit disconnects when overcurrent surpasses the scheduled time.
In uninterruptible power system of the present invention, described insurance unit is a fuse.
Battery sharing circuit of the present invention and uninterruptible power system, by between the dc bus of each inverter or uninterrupted power supply and storage battery, increasing from the unidirectional onunit of battery positive voltage to the anodal unidirectional conducting of dc bus, make no longer directly to connect between the dc bus of a plurality of inverters or uninterrupted power supply, avoided a certain inverter or fault of uninterrupted power source and cause the situation of all inverters or uninterrupted power supply power down.The present invention can significantly improve the reliability of uninterruptible power system.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the schematic diagram of CB common battery circuit in the existing uninterruptible power system;
Fig. 2 is the schematic diagram of CB common battery embodiment of circuit of the present invention;
Fig. 3 is the schematic diagram of another embodiment of CB common battery circuit of the present invention.
Embodiment
The present invention passes through to increase between the dc bus of each uninterrupted power supply of uninterruptible power system or inverter and storage battery from the unidirectional onunit of battery positive voltage to the anodal unidirectional conducting of dc bus, make no longer directly to connect between the dc bus of a plurality of uninterrupted power supplys or inverter, avoided a certain uninterrupted power supply or inverter fault and cause the situation of all uninterrupted power supplys or inverter power down.
As shown in Figure 2, be the schematic diagram (having omitted switch among this figure) of CB common battery embodiment of circuit of the present invention.In the present embodiment, this circuit comprises storage battery 23, first uninterrupted power supply 21 and second uninterrupted power supply 22, wherein the positive pole of the dc bus 24 of first uninterrupted power supply 21 is connected to the positive pole of storage battery 23 via the first unidirectional onunit, the positive pole of the dc bus 25 of second uninterrupted power supply 22 is connected to the positive pole of storage battery 23 via the second unidirectional onunit, and dc bus 24,25 negative pole then is directly connected to the negative pole of storage battery 23, above-mentioned first respectively, the second unidirectional onunit is respectively from positive best first uninterrupted power supply 21 of storage battery 23 or the anodal unidirectional conducting of second uninterrupted power supply 22.
Owing to be provided with unidirectional onunit between uninterrupted power supply and storage battery, therefore suppose that first uninterrupted power supply 21 breaks down, storage battery 23 discharges to the fault point via the first unidirectional onunit, and because the second unidirectional onunit blocking-up that links to each other with second uninterrupted power supply 22, second uninterrupted power supply, 22 electric currents can not flow to the fault point of first uninterrupted power supply 21, and its dc bus 25 can not dragged down by fault.Second uninterrupted power supply 22 can lean on the capacitive energy of self dc bus 25 to keep work in short time.
Certainly, in actual use, above-mentioned CB common battery circuit can comprise plural uninterrupted power supply, the shared storage battery 23 of these uninterrupted power supplys.
In the present embodiment, the first unidirectional onunit and the second unidirectional onunit are respectively diode D1, D2.Certainly, in actual use, also can adopt other electronic component with unidirectional conducting function or circuit.
Between the positive pole of the positive pole of the dc bus of first uninterrupted power supply 21 and storage battery 23, also be serially connected with one first insurance unit, also be serially connected with one second insurance unit between the positive pole of the positive pole of the dc bus of second uninterrupted power supply 22 and storage battery 23, the above-mentioned first insurance unit and the second insurance unit disconnect when overcurrent surpasses the scheduled time.
Like this, suppose that first uninterrupted power supply 21 breaks down, storage battery 23 discharges to the fault point by the first insurance unit and the first unidirectional onunit.Because the blocking-up of the second unidirectional onunit, the electric current of second uninterrupted power supply 22 can not flow to the fault point of first uninterrupted power supply 21, and second uninterrupted power supply 22 can lean on the capacitive energy of self dc bus 25 to keep work in the short time.Disconnect after the first insurance unit reaches the scheduled time when storage battery 23 discharging currents flow through, fault is excised from system, and storage battery 23 can be normally to 22 power supplies of second uninterrupted power supply.In the whole failure process, the operate as normal of second uninterrupted power supply 22 is unaffected.
In the present embodiment, the above-mentioned first insurance unit and the second insurance unit adopt fuse F1F2 respectively.
In order to realize charging control, also can in foregoing circuit, increase unidirectional gate-controlled switch to storage battery 23.Particularly, this circuit can comprise the first unidirectional controllable switch S 1 in parallel with the first unidirectional onunit and the second unidirectional onunit respectively and the second unidirectional controllable switch S 2.The above-mentioned first unidirectional controllable switch S 1 and the second unidirectional controllable switch S 2 disconnect under normal condition, and in uninterrupted power supply closure during to storage battery 23 charging.The first unidirectional controllable switch S 1 and the second unidirectional controllable switch S 2 when closure by the anodal unidirectional conducting of the dc bus positive pole of uninterrupted power supply to storage battery.
In the present embodiment, can control first uninterrupted power supply 21 respectively and 22 pairs of storage batterys 23 of second uninterrupted power supply charge by the first unidirectional controllable switch S 1 and the second unidirectional controllable switch S 2.For example, in that to use 21 pairs of storage batterys of first uninterrupted power supply 23 to carry out rechargeable, control first unidirectional controllable switch S 1 closure, this moment, 24 pairs of storage batterys of dc bus of first uninterrupted power supply 21 charged.
If in the charging process of first uninterrupted power supply 21, if other fault of uninterrupted power source, then first uninterrupted power supply 21 might power down.But compare original parallel connection power supply circuit: in case a uninterrupted power supply breaks down, then other whole uninterrupted power supplys all can power down.And,, at most also only can make an extra uninterrupted power supply (uninterrupted power supply that is promptly charging) power down even take place under the worst condition by circuit of the present invention.The reliability of whole power-supply system is improved.
In the present embodiment, above-mentioned first controllable switch S 1 and second controllable switch S 2 are respectively thyristor.
As shown in Figure 3, be the schematic diagram (having omitted switch among this figure) of another embodiment of CB common battery circuit of the present invention.Different with a last embodiment is, present embodiment is applied to inverter situation about using in parallel, and promptly batteries 33 be inverter 31,32 power supplies, or inverter 31,32 to replace above-mentioned uninterrupted power supply 21,22 be that storage battery 33 charges.
The present invention also provides a kind of uninterruptible power system that comprises above-mentioned CB common battery circuit.The uninterruptible power system that this adopts above-mentioned CB common battery circuit has higher reliability.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. CB common battery circuit, it is characterized in that, comprise that storage battery reaches at least two inverters or uninterrupted power supply, the positive pole of the dc bus of described at least two inverters or uninterrupted power supply is connected to the positive pole of storage battery respectively via a unidirectional onunit, the negative pole of described dc bus is connected respectively to the negative pole of storage battery, and described unidirectional onunit is from the positive best inverter of storage battery or the anodal unidirectional conducting of uninterrupted power supply.
2. CB common battery circuit according to claim 1, it is characterized in that, also comprise at least two unidirectional gate-controlled switches in parallel with unidirectional onunit respectively, described unidirectional gate-controlled switch disconnects under normal condition and in inverter or uninterrupted power supply closure during to charge in batteries, described unidirectional gate-controlled switch when closure by the anodal unidirectional conducting of the dc bus positive pole of inverter or uninterrupted power supply to storage battery.
3. CB common battery circuit according to claim 2 is characterized in that, described unidirectional onunit is a diode, and described unidirectional gate-controlled switch is a thyristor.
4. according to each described CB common battery circuit among the claim 1-3, it is characterized in that, also be serially connected with an insurance unit between the positive pole of each described inverter or uninterrupted power supply dc bus and the positive pole of storage battery, described insurance unit disconnects when overcurrent surpasses the scheduled time.
5. CB common battery circuit according to claim 4 is characterized in that, described insurance unit is a fuse.
6. uninterruptible power system, it is characterized in that, comprise that storage battery reaches at least two inverters or uninterrupted power supply, the positive pole of the dc bus of described at least two inverters or uninterrupted power supply is connected to the positive pole of storage battery respectively via a unidirectional onunit, the negative pole of described dc bus is connected respectively to the negative pole of storage battery, and described unidirectional onunit is from the positive best inverter of storage battery or the anodal unidirectional conducting of uninterrupted power supply.
7. uninterruptible power system according to claim 6, it is characterized in that, also comprise at least two unidirectional gate-controlled switches in parallel with unidirectional onunit respectively, described unidirectional gate-controlled switch disconnects under normal condition and in inverter or uninterrupted power supply closure during to charge in batteries, described unidirectional gate-controlled switch when closure by the anodal unidirectional conducting of the dc bus positive pole of inverter or uninterrupted power supply to storage battery.
8. uninterruptible power system according to claim 7 is characterized in that, described unidirectional onunit is a diode, and described unidirectional gate-controlled switch is a thyristor.
9. according to each described uninterruptible power system among the claim 6-8, it is characterized in that, also be serially connected with an insurance unit between the positive pole of each described inverter or uninterrupted power supply dc bus and the positive pole of storage battery, described insurance unit disconnects when overcurrent surpasses the scheduled time.
10. uninterruptible power system according to claim 9 is characterized in that, described insurance unit is a fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101978808A CN102280922A (en) | 2010-06-11 | 2010-06-11 | Shared battery circuit and uninterrupted power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101978808A CN102280922A (en) | 2010-06-11 | 2010-06-11 | Shared battery circuit and uninterrupted power supply system |
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| Publication Number | Publication Date |
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| CN102280922A true CN102280922A (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101978808A Pending CN102280922A (en) | 2010-06-11 | 2010-06-11 | Shared battery circuit and uninterrupted power supply system |
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| CN (1) | CN102280922A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326442A (en) * | 2013-07-05 | 2013-09-25 | 清华大学 | Switching device for scheduling and balancing high voltage large capacity battery packs in parallel |
| CN103872761A (en) * | 2014-04-09 | 2014-06-18 | 厦门玛司特电子工业有限公司 | Switching method of UPS power supplier and UPS power supplier |
| CN109713775A (en) * | 2019-02-27 | 2019-05-03 | 广州宝狮新能源有限公司 | A kind of lithium battery group energy-storage system comprising multiple uninterruptible power supplies |
| TWI795712B (en) * | 2020-04-09 | 2023-03-11 | 台達電子工業股份有限公司 | Power supply system and method of operating the same |
| CN116339480A (en) * | 2023-05-29 | 2023-06-27 | 苏州浪潮智能科技有限公司 | Power-down holding circuit of power supply unit, control method and control device thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6311279B1 (en) * | 1998-10-27 | 2001-10-30 | Compaq Computer Corporation | Network node with internal battery backup |
| CN2689566Y (en) * | 2004-02-10 | 2005-03-30 | 山特电子（深圳）有限公司 | Uninterruptible power supply with battery shared |
| CN201038822Y (en) * | 2006-12-25 | 2008-03-19 | 孙毅彪 | Quick non-interrupted power system |
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2010
- 2010-06-11 CN CN2010101978808A patent/CN102280922A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6311279B1 (en) * | 1998-10-27 | 2001-10-30 | Compaq Computer Corporation | Network node with internal battery backup |
| CN2689566Y (en) * | 2004-02-10 | 2005-03-30 | 山特电子（深圳）有限公司 | Uninterruptible power supply with battery shared |
| CN201038822Y (en) * | 2006-12-25 | 2008-03-19 | 孙毅彪 | Quick non-interrupted power system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326442A (en) * | 2013-07-05 | 2013-09-25 | 清华大学 | Switching device for scheduling and balancing high voltage large capacity battery packs in parallel |
| CN103872761A (en) * | 2014-04-09 | 2014-06-18 | 厦门玛司特电子工业有限公司 | Switching method of UPS power supplier and UPS power supplier |
| CN109713775A (en) * | 2019-02-27 | 2019-05-03 | 广州宝狮新能源有限公司 | A kind of lithium battery group energy-storage system comprising multiple uninterruptible power supplies |
| TWI795712B (en) * | 2020-04-09 | 2023-03-11 | 台達電子工業股份有限公司 | Power supply system and method of operating the same |
| CN116339480A (en) * | 2023-05-29 | 2023-06-27 | 苏州浪潮智能科技有限公司 | Power-down holding circuit of power supply unit, control method and control device thereof |
| CN116339480B (en) * | 2023-05-29 | 2023-08-18 | 苏州浪潮智能科技有限公司 | Power-down holding circuit of power supply unit, control method and control device thereof |
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Application publication date: 20111214 |