CN113169581A - Uninterruptible power supply device - Google Patents
Uninterruptible power supply device Download PDFInfo
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- CN113169581A CN113169581A CN201980079440.1A CN201980079440A CN113169581A CN 113169581 A CN113169581 A CN 113169581A CN 201980079440 A CN201980079440 A CN 201980079440A CN 113169581 A CN113169581 A CN 113169581A
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- 238000007600 charging Methods 0.000 claims abstract description 125
- 230000006866 deterioration Effects 0.000 claims description 23
- 238000012806 monitoring device Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 description 17
- 238000000034 method Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 12
- 238000012423 maintenance Methods 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 8
- 238000006731 degradation reaction Methods 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 6
- 230000002457 bidirectional effect Effects 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 238000010277 constant-current charging Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides an uninterruptible power supply device capable of prolonging the replacement cycle of a storage battery. The uninterruptible power supply device with a battery according to the present invention is characterized in that the operation is performed such that the charging rate of the battery after the operation of the battery is higher than the charging rate of the battery when the battery is mounted.
Description
Technical Field
The present invention relates to an uninterruptible power supply device.
Background
In the uninterruptible power supply device, the main power supply is a commercial frequency ac power supply, and the backup power supply is a battery, so that when the main power supply fails, the battery is boosted and dc/ac converted to continue power supply to the load. In this uninterruptible power supply device, when the power outage compensation time, which is the time during which the battery can continue to supply power to the load, is equal to or less than the nominal time, the battery is replaced. The battery replacement needs to be performed periodically by a user or a maintenance service while the uninterruptible power supply device is in use.
The uninterruptible power supply device has a function of charging the battery from the main power supply. The existing uninterruptible power supply device uses a constant voltage and constant current charging mode. In the constant-voltage constant-current charging method, charging is performed until the battery voltage becomes a desired constant voltage. Since the deterioration of the battery progresses and the effective capacity decreases as the use time elapses, the battery replacement cycle can be extended as compared with the constant-voltage constant-current charging method by switching the charging mode as the deterioration of the battery progresses.
As a countermeasure against the above-described problem in the uninterruptible power supply device, the following method is known. Patent document 1 discloses in paragraphs 0004 and 0007 that a charge control device for measuring an elapsed time from the start of use and increasing a charge voltage to a lithium ion secondary battery as the elapsed time progresses is provided, and that excessive charging more than necessary for the power failure compensation time is prevented at the beginning of use of the lithium ion secondary battery.
In patent document 2, when a deterioration determination unit based on data of the battery use time, temperature, and region performs deterioration determination, charging control to the battery is switched to secure a standby time as much as possible and suppress the progress of deterioration of the battery.
In patent document 3, the regions are classified into two regions, i.e., a first discharge region and a second discharge region, according to the depth of discharge of the battery, and the discharge control of the battery is switched in the first discharge region where partial overdischarge is likely to occur, and the discharge rate is restricted, thereby suppressing the progress of deterioration of the battery.
In any patent document, as a technology for suppressing deterioration of a lithium ion battery, charge/discharge control is switched according to a deterioration judgment algorithm or time progression, thereby preventing the battery from being deteriorated more than necessary.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2005-278334
Patent document 2: japanese laid-open patent publication No. 2017-168328
Patent document 3: japanese patent laid-open No. 2014-216266
Disclosure of Invention
Problems to be solved by the invention
According to the deterioration prevention measures of the patent documents, since the charging voltage of the battery is fixed, the progress of the deterioration more than necessary is promoted at the initial stage of the use of the battery. In addition, since the effective capacity decreases during the life of the battery, the power failure compensation time cannot be secured. As a result, there is a problem that the battery replacement cycle becomes short.
Accordingly, an object of the present invention is to provide an uninterruptible power supply device capable of extending a battery replacement cycle.
Means for solving the problems
As described above, the present invention provides an uninterruptible power supply unit having a battery, comprising: the operation is performed in such a manner that the charging rate of the storage battery after the operation of the storage battery is higher than the charging rate of the storage battery when the storage battery is mounted. ".
Further, according to the present invention, "an uninterruptible power supply device for supplying power to a load from an ac power supply and a battery and charging the battery from the ac power supply includes: a battery monitoring device for determining a battery charging rate of the battery; and a control device for controlling power supply to the load and charging and discharging of the battery, wherein the control device operates such that the charging rate of the battery after the operation of the battery is higher than the charging rate of the battery when the battery is mounted. ".
Effects of the invention
According to the invention, the storage battery replacement cycle of the uninterruptible power supply device can be prolonged.
Drawings
Fig. 1 is a schematic diagram showing an example of an uninterruptible power supply device of the present invention.
Fig. 2 is a schematic diagram showing an example of a decrease in the capacity retention rate as the deterioration of the battery progresses.
Fig. 3 is a schematic diagram showing the relationship between the deterioration progress (horizontal axis), the battery charge rate (vertical axis), and the effective battery capacity.
Fig. 4 is a schematic diagram showing effective capacitances in a case where the state of charge is increased N times while the battery is in use.
Fig. 5 is a schematic diagram showing a method of switching the battery charge mode according to the embodiment of the present invention.
Fig. 6 is a display diagram when the normal mode is selected.
Fig. 7 is a display diagram when the life prolonging mode is selected.
Fig. 8 is a flowchart showing an example of the increase in the charging rate according to the degree of deterioration of the battery.
Fig. 9 is a flowchart showing an example of the depth of discharge required to determine the power outage compensation time in the lifetime extension mode.
Detailed Description
Hereinafter, an embodiment of an uninterruptible power supply device according to the present invention will be described in detail with reference to the drawings.
Example 1
Fig. 1 is a schematic diagram showing an example of an uninterruptible power supply device of the present invention. First, an example of the structure and operation of the uninterruptible power supply device of the present invention will be described with reference to fig. 1.
The uninterruptible power supply unit 127 is connected to two or more ac power supplies including the main ac power supply 101 and the bypass ac power supply 102 and the battery 105, and supplies power from these to the load device 112. The main ac power supply 101 and the main power supply of the bypass ac power supply 102 may be different systems or may be the same system.
Specifically, the uninterruptible power supply device of fig. 1 is connected from a main ac power supply 101 to a load device 112 via a main ac power supply input switch 103, a forward power converter (rectifier) 108, a dc power supply (dc circuit) 130, a reverse power converter (inverter) 109, and an ac output switch 121. The bypass ac power supply 102 is connected to the load device 112 via the bypass ac input switch 104 and the ac semiconductor switch 111. The load device 112 is connected from the battery 105 through switches 106 and 107 between the battery 105 and the uninterruptible power supply device 127, the bidirectional dc converter 110, the dc circuit 130, the reverse power converter 109, and the ac output switch 121.
The uninterruptible power supply unit 127 having the above-described main circuit configuration is controlled by the control unit 120. The ac power supply side control by the controller 120 is performed as follows. First, when the voltage and frequency of the main ac power supply 101 are within the normal ranges, the main ac power supply input switch 103 is turned on. Similarly, when the voltage and frequency of the bypass ac power supply 102 fall within the normal ranges, the control device 120 turns on the bypass ac input switch 104.
The control device 120 also functions as the forward and reverse power converters 108 and 109 and the ac semiconductor switch 111. Thus, the main ac power supply 101 is converted into the dc power supply 130 by the ac/dc conversion of the forward power converter 108, and the dc power supply 130 is converted into the ac power supply again by the dc/ac conversion of the reverse power converter 109. Therefore, the ac output 129 can be obtained from the main ac power supply 101 by turning the main ac power supply input switch 103 and the ac output switch 121 on. The ac output 129 can be obtained from the bypass ac power supply 102 without passing through the forward/ reverse power converters 108 and 109 by turning the bypass ac input switch 104 and the ac semiconductor switch 111 on. The ac output 129 can continue power supply without instantaneous interruption by instantaneously switching the on states of the ac semiconductor switch 111 and the ac output switch 121. Therefore, the load device 112 can continue to operate regardless of the operating state of the uninterruptible power supply 127.
The battery side control by the control device 120 is performed as follows. In the battery-side control, the charging and discharging of the battery 105 is controlled by the bidirectional dc converter 110. Battery 105 is charged from dc power supply 130 by forward power converter 108 and dc converter 110. Further, the electric power is supplied to the load device 112 through the dc converter 110 and the reverse power converter 109 by discharging the battery 105. When the main ac power supply 101 is subjected to a power failure or disturbance, the control device 120 of the uninterruptible power supply device 127 can stop the forward power converter 108, and then maintain the state of power supply to the load device 112 by the stored power of the battery 105.
The above-described operation of the uninterruptible power supply unit 127 is performed by the control unit 120 and the battery monitoring unit 126. Next, the control device 120 and the battery monitoring device 126 of the uninterruptible power supply device 127 according to the present invention will be described with reference to fig. 1.
The control device 120 of the uninterruptible power supply 127 includes the following inputs as typical control inputs.
In fig. 1, these inputs are detection signals from an ac power supply input voltage detector 113, a main ac power supply input current detector 114, a bypass ac power supply input voltage detector 115, an output ac voltage detector 116, an output ac current detector 117, a battery voltage detector 118 related to control of the uninterruptible power supply device, and a battery current detector 119 related to control of the uninterruptible power supply device. Further, the input signal 128 is obtained from an interface between the battery monitoring device 126 and the uninterruptible power supply device 127.
The battery monitoring device 126 includes the following inputs as representative control inputs. However, the battery 105 is configured by a plurality of unit batteries connected in series or in series-parallel, and when there are m sets of unit batteries, for example, the cell voltage and current in each set of unit batteries are taken into the battery monitoring device 126. In fig. 1, these are, for example, a cell voltage detector 122 of the first unit battery, a cell voltage detector 123 of the second unit battery, a cell voltage detector 124 of the nth unit battery (n 2, 3, 4.), a cell temperature detector 131 of the first unit battery, a cell temperature detector 132 of the mth unit battery (m 2, 3, 4.), and a cell current detector 125 for the total current of the battery 105.
The battery monitoring device 126 estimates the state of charge and degradation of the battery based on these control inputs.
The control device 120 of the uninterruptible power supply unit 127 receives information on the state of charge of the battery and the estimated degradation of the battery as an input signal 128 from the battery monitoring device 126 via the interface between the battery monitoring device 105 and the uninterruptible power supply unit 127.
The control device 120 of the uninterruptible power supply 127 comprehensively processes the above-described inputs, and finally performs waveform control in the forward power converter 108, the reverse power converter 109, and the bidirectional dc converter 110, and sequence control in the main ac power supply input switch 103, the bypass ac input switch 104, the switches 106 and 107 between the battery and the uninterruptible power supply, the ac semiconductor switch 111, and the ac output switch 121. These controls in the control device 120 of the uninterruptible power supply device 127 are known methods, and therefore, a detailed description thereof is omitted. In addition, the present invention does not relate to these control methods.
The present invention is an invention of charging control of a battery using a bidirectional dc converter 110. Next, the method of carrying out the present invention will be described.
In the battery charging control according to the present invention, the uninterruptible power supply 127 receives information on the state of charge of the battery and the estimation of degradation, which is obtained by the battery monitoring device 126, as the input signal 128 via the interface, and charges the battery 105 to a desired charging rate based on the information on the battery charging rate included in the input signal 128.
The charging rate of the present embodiment is a ratio of the current amount of stored charge to the rated storage capacity. Specifically, for example, the charging rate is calculated by integrating the charge/discharge current of the battery current detector 125. By performing charge and discharge control according to the charging rate described above, the battery charging rate can be fixed to a range of a desired charging rate. The desired charging rate is calculated by the control device 120 of the uninterruptible power supply device 127 based on the input signal 128 received from the battery monitoring device 126. The control information (input signal 128) provided by the battery monitoring device 126 is, for example, temperature, battery cell voltage, battery charge rate, battery degradation estimation information, and the like, but other control information may be used. The method of controlling the storage battery according to the charging rate may perform storage battery management according to the progress of degradation of the storage battery or the elapsed time of use, as compared to the case of charging the storage battery only to a prescribed charging voltage.
The manner of thinking about the charging rate control according to the present invention will be described in more detail below.
Fig. 2 is a schematic diagram showing an example of a decrease in the capacity retention rate of the battery as the battery deterioration progresses. In fig. 2, the horizontal axis represents the deterioration state, and the vertical axis represents the initial capacity retention rate (%) representing the capacity retention rate characteristic for each initial state of charge.
In general, a battery stores electric energy that decreases as deterioration progresses or as time passes. Fig. 2 shows a state of decrease in the stored electric energy, and shows a characteristic of a capacity retention rate 201 as deterioration progresses in a battery having an initial charging rate of 95%, for example. Similarly, a battery capacity maintenance rate of 90% of the initial charging rate indicates the characteristic 202, a battery capacity maintenance rate of 80% of the initial charging rate indicates the characteristic 203, and a battery capacity maintenance rate of 70% of the initial charging rate indicates the characteristic 204. From these characteristics, the rate of capacity reduction accompanying the progress of deterioration becomes more gradual as the initial battery charge rate becomes lower.
Here, when the concept of the effective capacity of the battery is further explained, the effective capacity of the battery is a capacity obtained by multiplying the charging rate of the battery by the capacity maintenance rate. Therefore, the point at which the battery effective capacity becomes 50% for each charging rate can be represented as follows in fig. 2. A point at which the battery at the initial charging rate of 95% becomes the effective capacity of 50% is 205, a point at which the battery at the initial charging rate of 90% becomes the effective capacity of 50% is 206, a point at which the battery at the initial charging rate of 80% becomes the effective capacity of 50% is 207, a point at which the battery at the initial charging rate of 70% becomes the effective capacity of 50%, and a point at which the battery at the initial charging rate of 70% becomes the effective capacity of 50% is 208. At the point where the effective battery capacity becomes 50%, it can be said that the effective battery capacity reaches 50% at a time when the deterioration progresses earlier as the initial charging rate is higher.
In consideration of the above tendency of the battery as shown in fig. 2, the present invention proposes to use the battery while suppressing the charging rate low at the initial stage of use of the battery, and to use the battery while sequentially increasing the charging rate according to the degree of progress of deterioration. Specifically, the charging rate is sequentially increased by the stepwise switching operation.
An example of the operation of switching the battery state of charge according to the embodiment of the present invention will be described with reference to fig. 3.
The upper level of fig. 3 shows the relationship between the progress of degradation (horizontal axis) and the battery charge rate (vertical axis), and the lower level of fig. 3 shows the relationship between the progress of degradation (horizontal axis) and the battery effective capacity (vertical axis).
In the present embodiment, as shown in the upper layer of fig. 3, the initial T1 is used for the battery, and the battery is used while the charging rate is kept low. For example, at initial T1, the initial charging rate is set to 70%, and line 301 representing the battery charging rate of 70% is used. At this time, the effective battery capacity shown in the lower layer of fig. 3 can be represented by a decrease in the effective battery capacity 302 at a battery charge rate of 70%. For reference, the effective battery capacity shown in the lower layer of fig. 3 when the initial charging rate is set to 80% at the initial battery usage T1 is expressed as the effective battery capacity 307 of 80% of the battery charging rate. As is clear from comparison between 302 and 307, the charging rate is suppressed to be low (70%) in the initial state T1 of battery use, and therefore, a decrease in effective capacity can be suppressed as compared with the case where the charging rate is high (80%).
In the embodiment of the present invention, after the battery use initial T1 is set to the above operation, the charge rate switching control is performed while the battery is in use. Here, an example is shown in which the charging rate is initially increased by 10% to 80% at time t1 at which the effective capacity becomes 50%. In the lower layer of fig. 3, a point where the charging is performed by 10% is indicated by 305. This results in a state of charge of 80%, which in the upper layer of fig. 3 is shifted from 301 to a line 303 indicating a battery state of charge of 80%. At the same time, the degradation characteristic of the effective battery capacity accompanying the progress of the deterioration also inclines from 307 to 304, which is the effective battery capacity of 80% of the battery charging rate, as shown in the lower layer of fig. 3.
The effects of the embodiment of the present invention in the above-described operation will be described. Here, after the above-described operation change at time t1, attention is again paid to time t2 at point 306 at which the battery effective capacity becomes 50%. Note that, with respect to characteristic 307 in the case where the initial charging rate is fixed to 80%, attention is paid to time t3 at which the effective battery capacity becomes 50%. As is clear from comparison between t2 and t3, the battery can be used for a longer period of time only for 308 hours. The initial charging rate and the charging rate increase width shown in the present embodiment are examples for explanation, and the same can be applied even if these numbers are different.
As described above, in the uninterruptible power supply device according to the embodiment of the present invention, the charging rate is suppressed to be low at the initial stage of use of the battery. This suppresses the deterioration of the battery at the beginning of use. In addition, the target charging rate is increased during the use of the battery. Thus, even in the life time when the effective capacity of the battery is reduced, the necessary power failure compensation time can be ensured.
Example 2
In example 2, a case is shown in which N-stage (N-2, 3, 4..) charge rate switching control is performed with respect to one stage of charge rate switching control in the middle of use of the battery of example 1.
The control contents of embodiment 2 will be described with reference to fig. 4. The items of the vertical and horizontal axes of fig. 4 are the same as those of fig. 3. In fig. 4, the initial state of charge (70%) and its operating period are T1, which is the same as in fig. 2, and the state of charge is increased by 10% to 80% at time T1 when the effective capacity becomes 50% first.
In this example, for example, when the line 405 having the battery charging rate of 70% is presented according to the initial charging rate, the effective capacity is represented by the effective capacity decrease rate 302 at the charging rate of 70%. At time t1 when the effective capacity reaches 50%, first charging rate switching control (10% charging) 409 is performed. This causes the state of charge to be 80%, and the line 406 transitions to a line indicating 80% of the state of charge. At the same time, the effective capacity also follows the effective capacity decrease rate 402 at the charging rate of 80%.
Then, when the effective capacity reaches 50% again at time t2, second-time charging rate switching control (10% complementary charging) 410 is performed. This causes the charging rate to be 90%, and therefore, the charging rate transits to line 407 indicating 90%. At the same time, the effective capacity also follows the effective capacity decrease rate 403 at the charging rate of 90%.
Next, when the effective capacity reaches 50% again at time t4, third charging rate switching control (M% charging) (N.M ═ 1, 2, 3..) 411 is performed. This causes the state of charge to be (90+ M)%, and therefore, the transition is made to line 408 indicating the state of charge (90+ M)%. At the same time, the effective capacity also follows the effective capacity decrease rate 404 at charge rate (90+ M)%. Thus, as the effective capacity decreases, the charging rate can be switched N times while the battery is in use.
The limit value of the decrease in the effective capacity shown in the present embodiment is an example for explanation, and the same can be applied even if the implementation determination threshold values are different.
Example 3
In embodiment 3, the uninterruptible power supply devices of embodiments 1 and 2 are described. Fig. 5 is a schematic diagram of an uninterruptible power supply device.
First, a method of switching the battery charge mode according to an embodiment of the present invention will be described with reference to fig. 5. The cabinet 501 of the uninterruptible power supply shown in fig. 5 includes a liquid crystal display setting device 502 on the front surface portion. The user can arbitrarily select the mode of charging the battery of the uninterruptible power supply device by operating the setting unit of the liquid crystal display setting device 502. In the embodiment, there are the following two modes. Mode 1 is referred to as a normal mode, and mode 2 is referred to as a life extension mode.
Fig. 6 is a display diagram when the normal mode is selected. Further, the display screen of the setting unit of the liquid crystal display setting device 502 is set to transition to the battery charging mode selection screen 601 in order to select the system setting screen and the operation setting after selecting the menu screen from the initial screen.
The battery charge mode selection screen 601 in the normal mode selection has a section 602 indicating the battery charge mode and a section 603 indicating the output load factor. As described in embodiment 1 and embodiment 2, the normal mode can secure the power outage compensation time by controlling the charging rate while keeping the initial charging rate low.
Fig. 7 is a display diagram when the life prolonging mode is selected. Further, the display screen of the setting unit of the liquid crystal display setting device 502 is set with a first initial screen, from which a menu screen is selected, then a system setting screen is selected from the menu screen, and the operation setting is selected to transition in order, thereby reaching the battery charging mode selection screen 701.
The battery charging mode selection screen 701 for selecting the life extension mode is composed of a section 702 for indicating the battery charging mode, a section 703 for indicating the output load factor, and a section 704 for selecting the power outage compensation time. The standby power supply continuation time at the time of power failure can be set by the section 704 for selecting the power failure compensation time. In the life extension mode, a necessary battery charging rate is calculated from information on the power outage compensation time and the output load rate.
Fig. 8 is an example of a flowchart of a case where the charging rate is changed. In the processing of fig. 8, first, the current set charging rate is read in step S801, the battery use elapsed time is read in step S802, and the depth of discharge information necessary for the power outage compensation time is read in step S803. Based on these pieces of information, the capacity reduction degree is determined in step S804. The battery capacity reduction rate may be calculated from an approximation even if stored in advance as a table. The effective capacity can be determined by the product of the charging rate and the battery capacity reduction rate.
Next, in step S805, it is determined whether or not the effective capacity exceeds the depth of discharge + 5%, and if not sufficient, the process proceeds to step S807, where the process is executed to increase the charging rate by + 5%, and if sufficient, the process proceeds to step S806, where the power outage compensation time is satisfied.
Fig. 9 is an example of a flowchart for calculating the depth of discharge. In the embodiment of fig. 9, it is determined in the processing step S901 whether it is the life extension mode or a mode other than the life extension mode. In the case of the life extension mode, the process proceeds to step S902, where the time-averaged data of the output load factor is read, and then the set value of the power outage compensation time is read in step S903. In processing step S904, a necessary depth of discharge is calculated. And calculating according to the ratio of the power failure compensation time in the normal mode to the power failure compensation time in the service life prolonging mode. Finally, in processing step S905, the processing of updating the depth of discharge information DOD1 is executed, and the series of processing ends. When it is determined in step S901 that the mode is other than the life extension mode, 50% of the depth of discharge information DOD1 is supplied in step S906.
In addition, the depth of discharge selection mode selectable in the present embodiment may be other modes of the normal mode and the lifetime extension mode.
Description of the reference numerals
101: main ac power supply, 102: bypass ac power supply, 103: main ac power input switch, 104: bypass ac input switch, 105: storage battery, 106, 107: switch between battery and uninterruptible power supply device, 108: forward power converter, 109: reverse power converter, 110: bidirectional dc converter, 111: alternating current semiconductor switch, 112: load device, 113: main ac power supply input voltage detector, 114: main ac power supply input current detector, 115: bypass ac power supply input voltage detector, 116: output ac voltage detector, 117: output alternating current detector, 118: battery voltage detector related to control of uninterruptible power supply apparatus, 119: battery current detector related to control of uninterruptible power supply apparatus, 120: control device for uninterruptible power supply, 121: ac output switch, 122: cell voltage detector of the first battery monitoring apparatus, 123: cell voltage detector of the second battery monitoring apparatus, 124: cell voltage detector of nth battery monitoring apparatus, 125: cell current detector of battery monitoring device, 126: battery monitoring device, 127: uninterruptible power supply device, 128: input signal, 129: ac output, 130: direct current power supply, 131: cell temperature detector of the first battery monitoring apparatus, 132: cell temperature detector (m 2, 3, 4.), 201: battery capacity maintenance rate at initial charging rate of 95%, 202: battery capacity maintenance rate at initial charging rate of 90%, 203: battery capacity maintenance rate at initial charging rate of 80%, 204: battery capacity maintenance rate at initial charging rate of 70%, 205: the initial charging rate of 95% of the battery becomes the point of 50% of the effective capacity, 206: the point at which the battery with the initial charging rate of 90% becomes the effective capacity of 50%, 207: battery with initial charging rate of 80% becomes the point of 50% of effective capacity, 208: the initial charging rate of 70% of the battery reaches the point of 50% of the effective capacity, 301: line representing battery charge rate 70%, 302: battery effective capacity at battery charge rate 70%, 303: line representing 80% of battery charge rate, 304: battery effective capacity at battery charge rate 80%, 305: point where 10% of the charging is performed, 306: the battery effective capacity is again 50% after the battery charging rate is changed, 307: from the battery effective capacity of the case initially fixed at the battery charge rate of 80%, 308: the point at which the effective battery capacity becomes 50% as compared with the case where the initial charging rate is fixed at 80%, 402: effective capacity decrease rate at a charging rate of 80%, 403: effective capacity decrease rate at 90% of charge rate, 404: effective capacity decrease rate at 95% of charge rate, 405: line representing 70% of charging rate, 406: line representing 80% of charging rate, 407: line representing 90% of charge, 408: line representing 95% of charging rate, 409: first-time charging rate switching control (10% charging), 410: second charging rate switching control (10% charging), 411: nth charging rate switching control (M% charging) (N.M ═ 1, 2, 3.), 501: cabinet of uninterruptible power supply apparatus, 502: liquid crystal display, 601: battery charging mode selection screen in normal mode selection, 602: section indicating battery charging mode, 603: section representing output load rate, 701: battery charging mode selection screen in life extension mode selection, 702: section indicating battery charging mode, 703: section representing output load rate, 704: the portion of the outage compensation time is selected.
Claims (5)
1. An uninterruptible power supply device with a storage battery is characterized in that:
the operation is performed in such a manner that the charging rate of the storage battery after the operation of the storage battery is higher than the charging rate of the storage battery when the storage battery is mounted.
2. The uninterruptible power supply device of claim 1,
as the deterioration of the battery progresses or the use time of the battery elapses, charge control is performed to increase the charging rate of the battery.
3. The uninterruptible power supply device according to claim 1 or 2,
the battery is operated in stages so that the battery charging rate after the operation of the battery is higher than the battery charging rate at the time of mounting the battery, and the period for increasing the battery charging rate and the increased battery charging rate are determined in stages.
4. The uninterruptible power supply device according to any one of claims 1 to 3,
the power failure compensation time is selected, and the charging rate of the storage battery is suppressed to be lower according to the load rate.
5. An uninterruptible power supply apparatus for supplying power to a load from an ac power source and a battery and charging the battery from the ac power source, comprising:
a battery monitoring device for determining a battery charging rate of the battery; and
a control device for controlling the power supply to the load and controlling the charging and discharging of the storage battery,
the control device causes the battery to operate such that the battery charging rate after the operation of the battery is higher than the battery charging rate when the battery is mounted.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018237117A JP2020099150A (en) | 2018-12-19 | 2018-12-19 | Uninterruptible power supply device |
| JP2018-237117 | 2018-12-19 | ||
| PCT/JP2019/043272 WO2020129438A1 (en) | 2018-12-19 | 2019-11-05 | Uninterruptible power supply device |
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|---|---|
| CN113169581A true CN113169581A (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980079440.1A Pending CN113169581A (en) | 2018-12-19 | 2019-11-05 | Uninterruptible power supply device |
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| Country | Link |
|---|---|
| JP (1) | JP2020099150A (en) |
| CN (1) | CN113169581A (en) |
| WO (1) | WO2020129438A1 (en) |
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| JPH11215731A (en) * | 1998-01-20 | 1999-08-06 | Sony Corp | Apparatus and method for charging of lithium ion battery |
| CN101355258A (en) * | 2007-07-27 | 2009-01-28 | 联想（新加坡）私人有限公司 | Method and apparatus for charging batteries |
| JP2011130540A (en) * | 2009-12-16 | 2011-06-30 | Panasonic Corp | Apparatus |
| CN102648105A (en) * | 2009-11-17 | 2012-08-22 | 丰田自动车株式会社 | Vehicle and method for controlling vehicle |
| JP2013141379A (en) * | 2012-01-06 | 2013-07-18 | Toshiba Mitsubishi-Electric Industrial System Corp | Uninterruptible power supply device |
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| JP2003338323A (en) * | 2002-05-20 | 2003-11-28 | Japan Storage Battery Co Ltd | Lithium ion battery charging system |
| JP5587941B2 (en) * | 2012-05-07 | 2014-09-10 | Ｎｅｃエンジニアリング株式会社 | Uninterruptible power supply and uninterruptible power supply method |
-
2018
- 2018-12-19 JP JP2018237117A patent/JP2020099150A/en active Pending
-
2019
- 2019-11-05 WO PCT/JP2019/043272 patent/WO2020129438A1/en active Application Filing
- 2019-11-05 CN CN201980079440.1A patent/CN113169581A/en active Pending
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| JPH11215731A (en) * | 1998-01-20 | 1999-08-06 | Sony Corp | Apparatus and method for charging of lithium ion battery |
| CN101355258A (en) * | 2007-07-27 | 2009-01-28 | 联想（新加坡）私人有限公司 | Method and apparatus for charging batteries |
| CN102648105A (en) * | 2009-11-17 | 2012-08-22 | 丰田自动车株式会社 | Vehicle and method for controlling vehicle |
| US20120283903A1 (en) * | 2009-11-17 | 2012-11-08 | Toyota Jidosha Kabushiki Kaisha | Vehicle and method for controlling vehicle |
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| JP2013141379A (en) * | 2012-01-06 | 2013-07-18 | Toshiba Mitsubishi-Electric Industrial System Corp | Uninterruptible power supply device |
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| Publication number | Publication date |
|---|---|
| WO2020129438A1 (en) | 2020-06-25 |
| JP2020099150A (en) | 2020-06-25 |
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