CN100448135C - Float cut-off method for voltage of battery in UPS - Google Patents
Float cut-off method for voltage of battery in UPS Download PDFInfo
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- CN100448135C CN100448135C CNB011299789A CN01129978A CN100448135C CN 100448135 C CN100448135 C CN 100448135C CN B011299789 A CNB011299789 A CN B011299789A CN 01129978 A CN01129978 A CN 01129978A CN 100448135 C CN100448135 C CN 100448135C
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Abstract
The present invention discloses a float cut-off method for the voltage of a UPS battery, which is used for realizing a real-time count down function before battery discharge is stopped. Compared with a method generally used for cutting off the voltage of a built-in battery at present, a system of the present invention can count down to display seconds to zero and then cut off the voltage after warning for oncoming cut-off battery discharge is sent out in a use period before the battery is judged as an aging failure, and in this way, a certain discharge time of the battery is ensured, and the length of the time can be set in a definite range by users.
Description
Technical field:
The present invention relates to a kind of method of float cut-off of voltage of battery in UPS, it relates to the uninterrupted power supply battery and alarms a method that is provided with and realizes the countdown function in advance.
Background technology:
In municipal power failure and uninterrupted power supply UPS when work, the battery in the ups power the workable time be that preparation time is very important, people understand this time exactly, can predict battery when to shut down, thereby can take counter-measure.But no matter take which kind of computational methods, the calculating of battery backup time all can not be very accurate.Generally speaking, people wish battery a period of time before shutdown, during the first few minutes of for example shutting down, give prior warning, and the time that point sets from alarm point to shutdown can guarantee to finish necessary preparation before shutdown, but, because the battery cutoff voltage point is (concrete battery cutoff voltage point generally is made as with the discharging current increase and reduces) of fixing, along with constantly wearing out in the battery use is capacity attenuation, the time of this section setting can be shorter and shorter, thereby finish necessary preparation before might causing the user to have little time to finish shutdown, cause the loss that to retrieve.
Summary of the invention:
Purpose of the present invention is exactly in order to overcome the above problems, a kind of float cut-off method of voltage of battery in UPS is provided, put the time of shutdown point from pre-alarm and determine that battery cut-off point magnitude of voltage then floats, thereby realize the countdown function of battery discharge final stage.
For achieving the above object, the present invention proposes a kind of float cut-off method of voltage of battery in UPS, be used to realize that battery discharge ends preceding real-time countdown function, it is characterized in that comprising the steps: the time tp from pre-alarm point to reference shutdown point of power-supply system according to user's setting, look into by the discharge curve gained discharge later stage base data table of battery under different discharge powers or electric current, obtain the pre-alarm voltage U p of tp correspondence, when detecting cell voltage U smaller or equal to pre-alarm voltage U p, enter pre-alarm stage and countdown, system shuts down during to zero point in countdown.
Owing to adopted above scheme, tp that stores in advance in the base data table and the mapping table of Up method by experiment obtain, can measure relatively accurately, can guarantee following advantage like this: for new battery, after arriving pre-alarm point, can guarantee that battery tp time to the battery that can work on ended with reference near the time cut-off point; Require the used batteries changed and be about to report lost property to the authorities imitate, also can carry out hardware guaranteed the tp duration before the electrical voltage point of protection countdown work to battery in system for system.Like this, the time of putting shutdown point from pre-alarm can be set at a definite value tp, and it does not change with the change of the account form of battery backup time, is convenient to the user and finishes protectiveness work such as data backup before system closedown.
Description of drawings:
Fig. 1 is the pre-alarm and the countdown part of a kind of battery management schematic flow sheet of design according to the present invention.
Embodiment:
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
The float cut-off method of voltage of battery in UPS of the present invention comprises the steps: 1) user selects to put from pre-alarm the time tp of shutdown point, its value can as required and artificially be set, as wish that battery reports to the police in the time of preceding 5 minutes in shutdown, then can establish tp=5.2) put the time tp that shutdown is put according to what the user set from pre-alarm, look into base data table, obtain the pre-alarm voltage U p of tp correspondence; Table 1,2 is Up base data table examples (be the data of ten batteries series connection test, the basic data when it is permanent power discharge, in like manner, the basic data during constant current discharge can record equally, omits its example herein) of two kinds of batteries.3) detect cell voltage (general 5-20 cycle detection second once), when detecting cell voltage U, enter pre-alarm point smaller or equal to pre-alarm voltage U p.
Table 1, NP12-65AH battery alarm voltage U p (V)
| The discharge power data category | 0.5K W | 0.75 KW | 1KW | 1.5K W | 2KW | 3KW | 4KW | 5KW | 6KW |
| 3 minutes Up | 108. | 108. | 108. | 109. | 110. | 110. | 111. | 112. | 112. |
| 4 | 5 | 9 | 3 | 0 | 8 | 5 | 2 | 3 | |
| 6 minutes Up | 108. 8 | 108. 9 | 109. 5 | 110. 2 | 111. 1 | 111. 5 | 113 | 113. 9 | 114. 6 |
Table 2, NP12-38AH battery alarm voltage U p (V)
| The discharge power data category | 0.5K W | 0.75 KW | 1KW | 1.25 KW | 1.5K W | 2KW | 2.5K W | 3KW | 4KW |
| 3 minutes Up | 108. 7 | 108. 9 | 110. 0 | 109. 9 | 110. 1 | 110. 2 | 111. 2 | 111. 7 | 112. 0 |
| 6 minutes Up | 109. 3 | 109. 6 | 111. 3 | 111 | 111. 5 | 111. 7 | 112. 9 | 113. 1 | 113. 9 |
Pre-alarm point is in case find, and battery shutdown point just is easy to determine, only need after entering pre-alarm point, and the beginning countdown, the countdown amount is tp, countdown is promptly shut down, as shown in Figure 1 to zero the time.
Data in the base data table are limited, if when user-selected tp can not find corresponding value in base data table, available interpolation calculation goes out corresponding Up, for example uses linear interpolation:
Up＝U1+(tp-t1)·(U2-U1)/(t2-t1)。
Wherein t1, t2 be in the base data table with immediate two the time point values of tp, U1, U2 are alarm magnitudes of voltage corresponding with t1, t2 in the base data table, also can get t1, t2 simply for selecting the minimum and maximum time value of pre-alarm that is provided with for the user.
On the other hand, because Up and discharge power P have relation,, also need power is carried out interpolation calculation once more its formula summary when discharge power is not in the table during listed data.And when battery is constant current discharge, the base data table when then needing to search constant current discharge.
Owing to can cause damage to battery hardly when prolonging the discharge time of last a few minutes for low discharging current; and during for heavy-current discharge; because battery discharge is that cut-ff voltage can descend with the increase of discharging current by the requirement of battery producer; so battery cutoff voltage can not cause harmful effect to battery performance with floating downward gradually in the cell degradation process yet during heavy-current discharge; but must test the assurance system at full load; battery from the reference cut-off point to system to the discharge surplus of the hardware protection electrical voltage point of battery; can satisfy and be aged to the requirement that its cut-ff voltage of battery before requiring to change floats and glides; so, possibly can't guarantee fully to realize that battery ends the function of preceding countdown to zero shutdown for not through the battery of detailed data test.
Claims (3)
1, a kind of float cut-off method of voltage of battery in UPS, be used to realize that battery discharge ends preceding real-time countdown function, it is characterized in that comprising the steps: the time tp from pre-alarm point to reference shutdown point of power-supply system according to user's setting, look into by the discharge curve gained discharge later stage base data table of battery under different discharge powers or electric current, obtain the pre-alarm voltage U p of tp correspondence, when detecting cell voltage U smaller or equal to pre-alarm voltage U p, enter pre-alarm stage and countdown, system shuts down during to zero point in countdown.
2, the float cut-off method of voltage of battery in UPS as claimed in claim 1 is characterized in that: when looking into base data table, if there are not the Up data corresponding with tp in the base data table, then go out corresponding Up with interpolation calculation:
Up＝U1+(tp-t1)·(U2-U1)/(t2-t1)，
Wherein t1, t2 be in the base data table with immediate two the time point values of tp, U1, U2 are alarm magnitudes of voltage corresponding with t1, t2 in the base data table; Also can get t1, t2 simply and select the minimum and maximum time value of pre-alarm that is provided with for supplying the user.
3, the float cut-off method of voltage of battery in UPS as claimed in claim 1 or 2 is characterized in that: when looking into base data table, if there are not the Up data corresponding with discharge power in the base data table, then go out corresponding Up with interpolation calculation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011299789A CN100448135C (en) | 2001-11-24 | 2001-11-24 | Float cut-off method for voltage of battery in UPS |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011299789A CN100448135C (en) | 2001-11-24 | 2001-11-24 | Float cut-off method for voltage of battery in UPS |
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| CN1353492A CN1353492A (en) | 2002-06-12 |
| CN100448135C true CN100448135C (en) | 2008-12-31 |
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| CNB011299789A Expired - Lifetime CN100448135C (en) | 2001-11-24 | 2001-11-24 | Float cut-off method for voltage of battery in UPS |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034137B (en) * | 2006-03-07 | 2010-05-12 | 新德科技股份有限公司 | Measurement of battery ending discharge voltage and correcting method |
| JP4884404B2 (en) * | 2007-09-07 | 2012-02-29 | 日立ビークルエナジー株式会社 | Method and apparatus for detecting internal information of secondary battery |
| CN101930056B (en) * | 2009-06-24 | 2013-07-24 | 力博特公司 | Method for predicting power backup time of battery |
| CN101931248B (en) * | 2009-06-24 | 2013-12-25 | 力博特公司 | Self-feedback ageing soft start method and system for UPS power supply |
| CN104749526B (en) * | 2014-05-22 | 2017-11-28 | 佛山市新光宏锐电源设备有限公司 | A kind of method of critical battery failure detection |
| CN105629896A (en) * | 2014-10-29 | 2016-06-01 | 航天信息股份有限公司 | Power system management method and apparatus for self-service terminal equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0588615A2 (en) * | 1992-09-17 | 1994-03-23 | Sony Corporation | Battery protection circuits |
| CN1093811A (en) * | 1993-03-02 | 1994-10-19 | 汤姆森消费电子有限公司 | Used low-voltage detection circuit on the remote control unit |
| JPH11283677A (en) * | 1998-03-27 | 1999-10-15 | Fuji Film Celltec Kk | Battery pack and method for controlling its state monitoring operation mode |
| CN2402045Y (en) * | 1999-11-23 | 2000-10-18 | 高水来 | UPS unit for fluorescent lamp |
-
2001
- 2001-11-24 CN CNB011299789A patent/CN100448135C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0588615A2 (en) * | 1992-09-17 | 1994-03-23 | Sony Corporation | Battery protection circuits |
| CN1093811A (en) * | 1993-03-02 | 1994-10-19 | 汤姆森消费电子有限公司 | Used low-voltage detection circuit on the remote control unit |
| JPH11283677A (en) * | 1998-03-27 | 1999-10-15 | Fuji Film Celltec Kk | Battery pack and method for controlling its state monitoring operation mode |
| CN2402045Y (en) * | 1999-11-23 | 2000-10-18 | 高水来 | UPS unit for fluorescent lamp |
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| CN1353492A (en) | 2002-06-12 |
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Address after: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee after: Vitamin Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |
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