CN108336809B - Uninterruptible power system capable of detecting battery equilibrium state - Google Patents
Uninterruptible power system capable of detecting battery equilibrium state Download PDFInfo
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- CN108336809B CN108336809B CN201710041537.6A CN201710041537A CN108336809B CN 108336809 B CN108336809 B CN 108336809B CN 201710041537 A CN201710041537 A CN 201710041537A CN 108336809 B CN108336809 B CN 108336809B
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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
- H02J9/061—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 for DC powered loads
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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
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
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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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a UPS system capable of detecting battery equilibrium state, which comprises a processor, a voltage measuring module, a voltage control module, a battery pack and a display unit, the voltage measuring module and the voltage control module are respectively connected with the battery pack and the processor, the processor is connected with the display unit and generates a voltage index value according to a plurality of voltage values measured to the battery pack by the voltage measuring module, generating a voltage status information according to the voltage index value and a set of index range information, controlling the charging of the battery pack through the voltage control module according to a plurality of voltage values, and re-acquire new battery status information and acquire the same battery status information within a status duration, the voltage of the battery is displayed to the user through the display unit for reference, so that the purpose of displaying the voltage balance state of the battery is achieved.
Description
Technical Field
The invention relates to an uninterruptible power system, in particular to an uninterruptible power system capable of detecting the equilibrium state of a battery.
Background
Currently, there is an Uninterruptible Power Supply (Uninterruptible Power Supply) on the market, which is used to provide temporary Power to electronic devices such as computers and servers when the commercial Power fails, so as to provide the computers and servers with instant data storage, thereby avoiding the loss of economy and data caused by data loss.
In the prior art, as shown in chinese application No. CN200910231060.3 (publication No. CN 102109577A) (hereinafter referred to as "the former case"), a method for displaying the electric quantity balance of a lead-acid battery based on the gray statistical theory is disclosed, which calculates the sequence of uniform polarity of the discharge end voltage of each cell of the lead-acid battery, the sequence of uniform polarity of the discharge current of each cell of the lead-acid battery, and the sequence of uniform polarity of the temperature of each cell of the lead-acid battery by the discharge end voltage of each cell, the discharge current of each cell of the lead-acid battery during periodic continuous discharge, and belongs to the gray class of the energy level states of full, high, medium, low and insufficient electric quantity, according to the sampling parameters of the lead-acid battery during discharge, according to the energy level samples of five energy level states of full, high, medium, low and insufficient electric quantity, so as to provide reliability of electric quantity display, Stability and the accuracy that improves the electric quantity and show.
Although the voltage, the current and the temperature of the lead-acid storage battery pack are calculated in the former case, the battery health state of the lead-acid storage battery pack cannot be known only by providing accurate electric quantity display in the former case, and even if the electric quantity of the current lead-acid storage battery pack can be accurately displayed, the battery health state cannot be known from the electric quantity.
In the prior art, as in chinese application No. CN201120529526.0 (publication No. CN 202395480U) (hereinafter referred to as "the second prior art"), a lithium battery protection board with a balanced display function is disclosed, in which an LED display lamp, a light emitting diode, a detection resistor, and a circuit board of the lithium battery protection board sequentially form a circuit loop, and the lithium battery protection board has the balanced display function, so that an installer can know whether the current balanced function is correct through on/off display of the balanced LED, thereby improving the balanced detection efficiency and the assembly power of the battery pack.
The second prior art reveals that the bright and dark that passes through LED shows to let the installer learn whether the lithium cell is normally installed, even if learn the normal installation of lithium cell, also can't learn whether the lithium cell is healthy state, whether the performance of lithium cell is normal promptly.
In the prior art, for example, PCT (Patent Cooperation treat, PCT, Patent Cooperation Treaty) application WO2013181121a1 Patent (hereinafter referred to as "third" for short), a battery string equalization method is disclosed, which discloses an equalization method of a battery string, mainly comprising a rechargeable battery module, wherein the rechargeable battery module comprises at least one battery string, and is charged by the rechargeable battery module until a first single battery string of the rechargeable battery module is charged to a preset maximum voltage, and then a pulsed charging current is reduced or given to the at least one battery string, and the foregoing steps are repeated, so that a charging characteristic curve of the battery module shows a concave state to increase a charging charge or voltage distribution.
In the prior art, the charging state is changed to make the characteristic curve of the battery module in a concave state so as to increase the charging charge or voltage distribution, but the health state of the battery module cannot be displayed, and the user cannot know when the battery module needs to be replaced.
Disclosure of Invention
In view of the above problems in the prior art, a primary objective of the present invention is to provide an uninterruptible power system capable of detecting a battery equalization state and a state determination method thereof, wherein the battery equalization state is detected by displaying and controlling the charging of the battery to restore the battery equalization state, and when the battery cannot restore the battery equalization state, the battery state is displayed to allow a user to know, so that the user can replace the battery conveniently, thereby achieving the purpose of improving the reliability of the battery.
In order to achieve the above object, the technical means is that the uninterruptible power system capable of detecting the battery equalization state includes:
an AC power input port for receiving an AC power;
the battery charging unit is connected with the alternating current power supply input port;
a DC-to-AC converter connected to the battery charging unit;
the first contact is connected with the alternating current power supply input port, the second contact is connected with the direct current-to-alternating current converter, and the selector switch receives signals to control the selector switch to be connected with the first contact or the second contact;
the alternating current power supply output port is connected with the switching end of the selector switch, so as to be connected with an external electronic device and provide alternating current power supply;
the processor comprises a plurality of input ends and a plurality of output ends, the input end of the processor is connected with the alternating current power input port, the output end of the processor is connected with the change-over switch, the processor sends a control signal to order the change-over switch to switch according to whether an alternating current signal is received or not, and the processor comprises a signal conversion unit which is used for converting the signal into a numerical value;
the display unit is connected with the output end of the processor and is used for displaying information;
a battery pack, which is connected with the battery charging unit and the DC-AC converter respectively, and is used for providing a DC power supply, receiving the power supply transmitted by the battery charging unit and charging;
the voltage measuring module comprises a plurality of input ends and a plurality of output ends, the output end of the voltage measuring module is connected with the input end of the processor, and the input end of the voltage measuring module is connected with the battery pack and used for measuring the voltage of the battery pack;
the voltage control module comprises a plurality of input ends and a plurality of output ends, the input end of the voltage control module is connected with the output end of the processor, and the output end of the voltage control module is respectively connected with the battery pack and the input end of the voltage measurement module;
the processor generates a voltage index value according to a plurality of voltage values of the battery pack measured by the voltage measurement module, generates a voltage state information according to the voltage index value and a set of index range information, controls the voltage control module to control the charging of the battery pack according to each voltage value, reacquires new battery state information, generates the same battery state information within a state duration, and controls the display unit to display the generated battery state information.
With the above structure, after the processor generates a voltage index value according to each voltage value, and generates a voltage state information according to the group index range information and the generated voltage index value, the voltage control module controls the charging of the battery pack and acquires new voltage values again to generate new voltage index values, and generates new battery state information according to the new voltage index values and the group index range information, and when the battery state information acquired within the state time is the same, the battery state information is displayed by the display unit for reference of a user, so that the user can know the voltage equilibrium state of the battery pack, and the user can know when to replace the battery pack conveniently, thereby achieving the purpose of displaying the voltage equilibrium state of the battery.
Drawings
FIG. 1 is a block diagram of a system architecture of a first preferred embodiment of the UPS of the present invention.
FIG. 2 is a block diagram of a voltage measurement module according to a first preferred embodiment of the UPS system of the present invention.
FIG. 3 is a block diagram and a current diagram of a voltage control module of the UPS according to the first preferred embodiment of the present invention.
FIG. 4 is another current diagram of the voltage control module of the UPS according to the first preferred embodiment of the present invention.
FIG. 5 is a schematic current diagram of the voltage control module of the UPS according to the first preferred embodiment of the present invention.
FIG. 6 is a block diagram of a system architecture of a second preferred embodiment of the UPS of the present invention.
FIG. 7 is a block diagram of a system architecture of a third preferred embodiment of the UPS of the present invention.
Reference numerals
11 ac power input port 12 battery charging unit
13 DC-AC converter 14 change-over switch
141 first contact 142 second contact
143 switching terminal 15 AC power supply output port
16 first processor 161 first signal conversion unit
16A second processor 161A second signal conversion unit
17 display unit 18 surge suppressor
19 filter 21 first battery
22 second battery 23 third battery
30 first measuring circuit of voltage measuring module 31
32 second measurement circuit 33 third measurement circuit
40 voltage control module 41 first crystal switch unit
411 first end 412 second end
413 third terminal 42 second crystal switch unit
421 first end 422 second end
423 third terminal 43 third transistor switching unit
431 a first end 432 a second end
433 third terminal 44 first signal switch unit
441 first end 442 second end
443 third terminal 45 second signal switching unit
451A first end 452 and a second end
453 third end 51 first DC transport interface port
52 second dc transport interface port 53 first communication interface port
54 second communication interface port
Detailed Description
The technical means adopted by the invention to achieve the preset purpose are further described below by combining the accompanying drawings and the preferred embodiments of the invention.
Referring to fig. 1, a first preferred embodiment of the uninterruptible power system for detecting a battery equalization state according to the present invention includes an ac power input port 11, a battery charging unit 12, a dc-ac converter 13, a switch 14, an ac power output port 15, a first processor 16, a display unit 17, a battery pack, a voltage measurement module 30, and a voltage control module 40, and in this embodiment, further includes a surge suppressor 18 and a filter 19.
The input end of the battery charging unit 12 is connected to the ac power input port 11, the output end of the battery charging unit 12 is connected to the input end of the dc-to-ac converter 13 and the battery pack, respectively, and the battery charging unit 12 receives the ac power from the ac power input port 11 and converts the ac power into a dc power to charge the battery pack.
The input end of the surge suppressor 18 is connected to the ac power input port 11, the output end of the surge suppressor 18 is connected to the input end of the filter 19, the surge suppressor 18 is used for suppressing the surge power, and the filter 19 is used for filtering out unnecessary signals.
The switch 14 includes a first contact 141, a second contact 142 and a switch 143, the first contact 141 is connected to the output terminal of the filter 19, the second contact 142 is connected to the output terminal of the dc-ac converter 13, and the switch 143 is connected to the ac power output port 15.
The first processor 16 includes a plurality of input terminals and a plurality of output terminals, the output terminal of the first processor 16 is connected to the switch 14 and the display unit 17, the input terminal of the first processor 16 is connected to the ac power input port 11, and the first processor 16 includes a first signal conversion unit 161 for converting an analog signal into a numerical value.
In the present embodiment, the battery pack includes a first battery 21, a second battery 22 and a third battery 23 connected in series in sequence, the positive terminal of the first battery 21 is connected to the input terminal of the dc-ac converter 13; in this embodiment, the first battery 21, the second battery 22 and the third battery 23 are all the same battery and have the same rated voltage, so the rated voltage is directly defined as a rated voltage reference value, that is, the rated voltage is equal to the rated voltage reference value; in the present embodiment, the number of the first battery 21, the second battery 22 and the third battery 23 is only an example and is not limited, and in fact, the battery of the battery pack may be connected in series with one or more batteries according to the requirement.
The ac power input port 11 is used for connecting to the commercial power, when the first processor 16 obtains an ac sensing signal from the ac power input port 11, the first processor 16 controls the switching terminal 143 of the switch 14 to switch to be connected to the first contact 141, so that the commercial power is directly supplied to an external electronic device (not shown) connected to the ac power output port 15, and when the first processor 16 does not obtain the ac sensing signal, the switching terminal 143 of the switch 14 is controlled to switch to be connected to the second contact 142, so that the power of the battery pack is output to the ac power output port 15 through the dc-to-ac converter 13 to be supplied to the external electronic device.
Referring to fig. 1 and 2, the voltage measuring module 30 includes a first measuring circuit 31, a second measuring circuit 32 and a third measuring circuit 33.
The first measurement circuit 31 includes a first resistor R1 and a second resistor R2, one end of the first resistor R1 is connected to the positive terminal of the first battery 21 and the input terminal of the dc-ac converter 13, and one end of the second resistor R2 is connected to the other end of the first resistor R1 and the input terminal of the first processor 16.
The second measurement circuit 32 includes a third resistor R3 and a fourth resistor R4, one end of the third resistor R3 is connected to the positive terminal of the second battery 22, and one end of the fourth resistor R4 is connected to the other end of the third resistor R and the input terminal of the first processor 16.
The third measuring circuit 33 includes a fifth resistor R5 and a sixth resistor R6, one end of the fifth resistor R5 is connected to the positive terminal of the third battery 23, one end of the sixth resistor R6 is connected to the other end of the fifth resistor R5 and the input terminal of the first processor 16, and the other ends of the second resistor R2, the fourth resistor R4 and the sixth resistor R6 are commonly connected to the negative terminal of the third battery 23.
The first measurement circuit 31 is configured to retrieve total voltage values of the first battery 21, the second battery 22, and the third battery 23 and transmit the total voltage values to the first processor 16, the second measurement circuit 32 is configured to retrieve total voltage values of the second battery 22 and the third battery 23 and transmit the total voltage values to the first processor 16, the third measurement circuit 33 is configured to retrieve voltage values of the third battery 23 and transmit the voltage values to the first processor 16, the first signal conversion unit 161 of the first processor 16 converts the voltage values in analog form transmitted by the first measurement circuit 31, the second measurement circuit 32, and the third measurement circuit 33 into corresponding values, the first processor 16 converts the voltage value of the third battery 23 into a third voltage value, and the first processor 16 converts the voltage value transmitted by the second measurement circuit 32, the third voltage value is subtracted to generate a second voltage value corresponding to the second battery 22, the first processor 16 converts the voltage value transmitted by the first measurement circuit 31, and then subtracts the second voltage value and the third voltage value to generate a first voltage value corresponding to the first battery 21, and the first processor 16 performs processing according to the converted first voltage value, second voltage value and third voltage value.
Referring to fig. 1 and 3, the voltage control module 40 includes a first transistor switch unit 41, a second transistor switch unit 42, a third transistor switch unit 43, a first signal switch unit 44, and a second signal switch unit 45.
The first transistor switch unit 41 has a first terminal 411, a second terminal 412, and a third terminal 413, the first terminal 411 of the first transistor switch unit 41 is connected to the positive terminal of the first battery 21, the second transistor switch unit 42 has a first terminal 421, a second terminal 422, and a third terminal 423, the first terminal 421 of the second transistor switch unit 42 is connected to the positive terminal of the second battery 22, the negative terminal of the first battery 21, and the second terminal 412 of the first transistor switch unit 41, the third transistor switch unit 43 has a first terminal 431, a second terminal 432, and a third terminal 433, the first terminal 431 of the third transistor switch unit 43 is connected to the positive terminal of the third battery 23, the negative terminal of the second battery 22, and the second terminal 422 of the second transistor switch unit 42, the second terminal 432 of the third transistor switch unit 43 is connected to the output terminal of the first processor 16, the third terminal 433 of the third transistor switch unit 43 is connected to the negative terminal of the third battery 23, the first signal switch unit 44 has a first terminal 441, a second terminal 442 and a third terminal 443, the first terminal 441 of the first signal switch unit 44 is connected to the third terminal 413 of the first transistor switch unit 41, the second terminal 442 of the first signal switch unit 44 is connected to the first processor 16, the third terminal 443 of the first signal switch unit 44 is connected to the negative terminal of the third battery 23, the second signal switch unit 45 has a first terminal 451, a second terminal 452 and a third terminal 453, the first terminal 451 of the second signal switch unit 45 is connected to the third terminal 423 of the second transistor switch unit 42, the second terminal 452 of the second signal switch unit 45 is connected to the first processor 16, the third terminal 453 of the second signal switching unit 45 is connected to a negative terminal of the third battery 23.
The first transistor switch unit 41 includes a first transistor Q1, a seventh resistor R7, an eighth resistor R8 and a ninth resistor R9, a first end (E end) of the first transistor Q1 is connected to one end of the seventh resistor R7 and the positive end of the first battery 21, a second end (B end) of the first transistor Q1 is connected to the other end of the seventh resistor R7 and one end of the eighth resistor R8, and a third end (C end) of the first transistor Q1 is connected to one end of the ninth resistor R9.
The second transistor switch unit 42 includes a second transistor Q2, a tenth resistor R10, an eleventh resistor R11 and a twelfth resistor R12, a first end (E end) of the second transistor Q2 is respectively connected to one end of the tenth resistor R10, the positive end of the second battery 22 and the other end of the ninth resistor R9 of the first transistor switch unit 41, a second end (B end) of the second transistor Q2 is connected to the other end of the tenth resistor R10 and one end of the eleventh resistor R11, and a third end (C end) of the second transistor is connected to one end of the twelfth resistor R12.
The third transistor switch unit 43 includes a third transistor Q3, a thirteenth resistor R13, a fourteenth resistor R14 and a fifteenth resistor R15, a first end (E end) of the third transistor Q3 is respectively connected to the negative terminal of the third battery 23 and one end of the fourteenth resistor R14, a second end (B end) of the third transistor Q3 is respectively connected to the other end of the fourteenth resistor R14 and one end of the fifteenth resistor R15, a third end (C end) of the third transistor Q3 is connected to one end of the thirteenth resistor R13, and the other end of the thirteenth resistor R13 is connected to the other end of the twelfth resistor R12 and the positive terminal of the third battery 23.
The first signal switch unit 44 includes a fourth transistor Q4, a sixteenth resistor R16 and a seventeenth resistor R17, wherein a first end (E end) of the fourth transistor Q4 is connected to an end of the seventeenth resistor R17, a negative end of the third battery 23, a first end (E end) of the third transistor Q3 and an end of the fourteenth resistor R14, respectively, a second end (B end) of the fourth transistor Q4 is connected to an end of the sixteenth resistor R16 and another end of the seventeenth resistor R17, respectively, a third end (C end) of the fourth transistor Q4 is connected to another end of the eighth resistor R8, and another end of the sixteenth resistor R16 is connected to the output terminal of the first processor 16.
The second signal switch unit 45 includes a fifth transistor Q5, an eighteenth resistor R18 and a nineteenth resistor R19, a first end (E end) of the fifth transistor Q5 is connected to one end of the eighteenth resistor R18, the negative end of the third battery 23, the first end (E end) of the third transistor Q3 and one end of the fourteenth resistor R14, respectively, a second end (B end) of the fifth transistor Q5 is connected to the other end of the eighteenth resistor R18 and one end of the nineteenth resistor R19, respectively, a third end (C end) of the fifth transistor Q5 is connected to the other end of the eleventh resistor R11, and the other end of the nineteenth resistor R19 is connected to the output end of the first processor 16.
Referring to fig. 3, when the charging of the first battery 21 is to be adjusted to equalize the voltages of the first battery 21, the second battery 22 and the third battery 23, the first processor 16 sends a corresponding control signal to turn on the fourth transistor Q4 of the first signal switching unit 44 and simultaneously turns on the first transistor Q1 of the first crystal switching unit 41, so that a small part of the current flows to the first battery 21, and a large part of the current flows to the second battery 22 and the third battery 23 through the first transistor Q1 and the ninth resistor R9 for charging.
Referring to fig. 4, when the charging of the second battery 22 is to be adjusted to equalize the voltages of the first battery 21, the second battery 22 and the third battery 23, the first processor 16 sends a corresponding control signal to turn on the fifth transistor Q5 of the second signal switching unit 45, and simultaneously turns on the second transistor Q2 of the second transistor switching unit 42, so that after the current flows through the first battery 21 for charging, a small portion of the current charges the second battery 22, and a large portion of the current flows through the second transistor Q2 and the twelfth resistor R12 for charging the third battery 23.
Referring to fig. 5, when the charging of the third battery 23 is to be adjusted to charge the first battery 21 and the second battery 22 so as to equalize the voltages of the first battery 21, the second battery 22 and the third battery 23, the first processor 16 sends a corresponding control signal to turn on the third transistor Q3 of the third transistor switch unit 43, so that when a current flows through the first battery 21 and the second battery 22 to charge, a small portion of the current charges the third battery 23, and a large portion of the current flows through the thirteenth resistor R13 and the third transistor Q3.
When the voltage balance state of the battery pack is to be detected, the first voltage value of the first battery 21, the second voltage value of the second battery 22 and the third voltage value of the third battery 23 are captured by the voltage measurement module 30 and transmitted to the first processor 16 for processing; in this embodiment, the first processor 16 processes the voltage value in three processing manners, a first processing manner is to subtract a minimum voltage value from a maximum voltage value and then divide the subtracted voltage value by the reference voltage value to generate a voltage index value, if the first voltage value is the maximum voltage value and the third voltage value is the minimum voltage value, subtract the third voltage value from the first voltage value and then divide the subtracted voltage value by the reference voltage value to generate the voltage index value, the first processor 16 determines an index range corresponding to the voltage index value according to a set of index range information to generate battery state information, where the set of index range information includes a first index range where the voltage index value is less than 0.5% (voltage index value < 0.5%) and a second index range where the voltage index value is more than or equal to 0.5% and less than 1% (voltage index value < 0.5% ≦ voltage index value ≦ 1%), a third index range in which the voltage index value is 1% or more and less than 2% (1% ≦ voltage index value < 2%), a fourth index range in which the voltage index value is 2% or more and less than 4% (2% ≦ voltage index value < 4%), and a fifth index range in which the voltage index value is 4% or more (4% ≦ voltage index value).
In a second processing manner, the voltage value with the smallest value is divided by the voltage with the largest value, if the first voltage value has the smallest value and the third voltage value has the largest value, the first voltage value is divided by the third voltage value to generate a corresponding voltage index value, and the first processor 16 determines an index range corresponding to the voltage index value according to the set of index range information to generate the battery state information A fourth index range where the voltage index value is greater than 0.96 and less than 0.98 (0.96< voltage index value ≦ 0.98), and a fifth index range where the voltage index value is less than 0.96 (voltage index value ≦ 0.96).
The third processing mode is to add the first voltage value, the second voltage value and the third voltage value and then take the average value to obtain a voltage average value, subtract the voltage average value from the first voltage value, the second voltage value and the third voltage value respectively and then take the absolute value respectively to generate a voltage calculation value respectively and correspondingly, and generate the voltage index value according to the voltage calculation value with the maximum voltage calculation value, the first processor 16 determines the index range corresponding to the voltage index value according to the set of index range information to generate the battery state information, in this embodiment, the index range information corresponding to the third processing mode includes a range where the voltage index value is less than 25mV (millivolt, mV) (voltage index value <25mV), A second index range in which the value of the voltage index is 25mV or more and less than 50mV (25mV <50mV), a third index range in which the value of the voltage index is 50mV or more and less than 100mV (50mV <100mV), a fourth index range in which the value of the voltage index is 100mV or more and less than 200mV (100mV <200mV), and a fifth index range in which the value of the voltage index is 200mV <200 mV).
In this embodiment, when the voltage index value falls within the first index range, battery state information indicating that the voltage balance state of the battery pack is Excellent (excelent) is generated, when the voltage index value falls within the second index range, battery state information indicating that the voltage balance state of the battery pack is Good (Good) is generated, when the voltage index value falls within the third index range, battery state information indicating that the voltage balance state of the battery pack is normal (usable), when the voltage index value falls within the fourth index range, battery state information indicating that the voltage balance state of the battery pack is poor (Not Good) is generated, and when the voltage index value falls within the fifth index range, battery state information indicating that the voltage balance state of the battery pack is poor (Bad) is generated.
The first processor 16 controls the charging of the first battery 21, the second battery 22 and the third battery 23 through the voltage control module 40 according to each voltage value, so that the battery pack is slowly recovered to a voltage equalization state, and the first processor 16 detects the battery pack again to obtain new battery state information when a detection time arrives, and displays the battery state information for a user to refer to through the display unit 17 when the first processor 16 generates the same battery state information in a set state duration; in this embodiment, the status duration may be at least 5 days, at least 7 days, or at least 10 days, and the status duration is only by way of example and not limitation, and may be set by the user according to the use environment.
In this embodiment, the display unit 17 may be a display and displays the battery status information in a text manner, and when the battery status information falls within the first index range, the battery status information is presented in excelent text for the user to refer to; when the battery state information falls in the second index range, Good characters are presented for the user to refer to; when the battery state information is in the third index range, displaying the battery state information in Uual characters for a user to refer to; when the battery state information is in the fourth index range, displaying the battery state information in Notgood characters for a user to refer to; and when the battery state information is in the fifth index range, displaying the battery state information in a Bad text for a user to refer to.
In this embodiment, the display unit 17 may be a display and display the battery status information in a backlight color, and when the battery status information falls within the first index range, the battery status information is presented in a green backlight for the user to refer to; when the battery state information is in the second index range, displaying the battery state information in blue backlight for a user to refer to; when the battery state information is in the third index range, displaying the battery state information in yellow backlight for a user to refer to; when the battery state information is in the fourth index range, orange backlight is presented for the user to refer to; and when the battery state information is within the fifth index range, displaying the battery state information in a red backlight mode for a user to refer to.
In this embodiment, the display unit 17 includes a plurality of LEDs, and respectively displays corresponding battery status information, and when the battery status information falls within the first index range, a first LED is presented for a user to refer to; when the battery state information is in the second index range, a second LED is presented for the user to refer to; when the battery state information is in the third index range, a third LED is presented for the user to refer to; when the battery state information is in the fourth index range, a fourth LED is presented for the user to refer to; and when the battery state information is within the fifth index range, presenting the battery state information by using a fifth LED for reference of a user.
Referring to fig. 6, a second preferred embodiment of the present invention is substantially the same as the first preferred embodiment, but a second processor 16A is further disposed between the first processor 16, the voltage measurement module 30 and the voltage control module 40 of the second preferred embodiment, the second processor 16A includes a second signal conversion unit 161A, a plurality of input terminals and a plurality of output terminals, the second processor 16A is connected to the first processor 16 for transmitting and receiving signals, the input terminal of the second processor 16A is connected to the voltage measurement module 30, the output terminal of the second processor 16A is connected to the voltage control module 40, the second processor 16A receives the voltage value measured by the voltage measurement module 30 and is converted by the second signal conversion unit 161A, for transmission to the first processor 16 for processing.
In this embodiment, since the second processor 16A includes the second signal conversion unit 161A, the voltage values measured by the voltage measurement module 30 are all processed by the second signal conversion unit 161A of the second processor 16A, so that the first processor 16 may not need to have the first signal conversion unit 161, or in order to reduce the operation load of the second processor 161A, the first processor 16 may also have the first signal conversion unit 161 to assist in processing signal conversion.
In this embodiment, the second processor 16A may also process the received voltage to generate the voltage status information, and transmit the voltage status information back to the first processor 16, and the first processor 16 causes the display unit 17 to display the voltage status information.
In this embodiment, the second processor 16A can directly send a control signal to the voltage control module 40 according to the voltage value transmitted by the voltage measurement module 30, so as to control the charging of the battery pack, so that the battery pack achieves the voltage balance of the battery, and the second processor 16A is disposed among the first processor 16, the voltage measurement module 30 and the voltage control module 40, so that the voltage measurement module 30 and the voltage control module 40 can be prevented from needing to pull a large number of circuits to the first processor 16, thereby simplifying the circuit arrangement.
Referring to fig. 7, a third preferred embodiment of the present invention is substantially the same as the second preferred embodiment, but considering the configuration problem of the uninterruptible power system, the battery pack, the voltage measurement module 30, the voltage control module 40 and the second processor 16A may be installed in different housings, so that the third preferred embodiment further includes a first dc transmission interface port 51, a second dc transmission interface port 52, a first communication interface port 53 and a second communication interface port 54.
The first dc transmission interface 51 is connected to the input end of the dc-ac converter 13, the second dc transmission interface 52 is connected to the positive terminal of the first battery 21 and the voltage measuring module 30, and the first dc transmission interface 51 is connected to the second dc transmission interface 52.
The first communication interface port 53 is connected to the first processor 16, the second communication interface port 54 is connected to the second processor 16A, and the first communication interface port 53 is connected to the second communication interface port 54.
In this embodiment, when any battery of the battery pack is aged, even if the voltage control module 40 controls the charging of the battery pack, the voltage equalization state of the battery pack cannot be improved, so that the battery state information is obtained by detecting the voltage equalization state of the battery pack, and when the same battery state information is obtained within the state duration, the battery state information is displayed to the user through the display unit 17 for reference, thereby achieving the purpose of displaying the voltage equalization state of the battery, and improving the reliability of detecting the voltage equalization state of the battery pack.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An uninterruptible power system capable of detecting battery equalization status, comprising:
an AC power input port for receiving an AC power;
the battery charging unit is provided with an input end and an output end, and the input end of the battery charging unit is connected with the alternating current power supply input port;
the direct current-to-alternating current converter is provided with an input end and an output end, and the input end of the direct current-to-alternating current converter is connected with the output end of the battery charging unit;
the first contact is connected with the alternating current power supply input port, the second contact is connected with the output end of the direct current-to-alternating current converter, and the change-over switch receives signals to control the change-over end to be connected with the first contact or the second contact;
the alternating current power supply output port is connected with the switching end of the selector switch, so as to be connected with an external electronic device and provide alternating current power supply;
a first processor, including a plurality of input terminals and a plurality of output terminals, wherein the input terminal of the first processor is connected to the ac power input port, the output terminal of the first processor is connected to the first contact of the switch, the first processor sends a control signal to instruct the switch to switch according to whether an ac signal is received, and the first processor includes a first signal converter for converting an analog signal into a digital value;
the display unit is connected with the output end of the first processor and is used for displaying information;
a battery pack comprising at least three batteries, wherein the at least three batteries comprise a first battery, a second battery and a third battery, the first battery, the second battery and the third battery respectively have a positive terminal and a negative terminal, the positive terminal of the first battery is respectively connected with the output terminal of the battery charging unit and the input terminal of the dc-to-ac converter and is used for providing a dc power supply;
the voltage measuring module comprises a plurality of input ends and a plurality of output ends, the output end of the voltage measuring module is connected with the input end of the first processor, and the input end of the voltage measuring module is connected with the battery pack and is used for measuring a plurality of voltage values of the battery pack;
a voltage control module, which includes a first crystal switch unit, a second crystal switch unit, a third crystal switch unit, a first signal switch unit, a second signal switch unit, a plurality of input terminals and a plurality of output terminals, wherein the input terminal of the voltage control module is connected with the output terminal of the first processor, and the output terminal of the voltage control module is respectively connected with the input terminals of the battery pack and the voltage measurement module;
wherein the first transistor switch unit has a first terminal, a second terminal, and a third terminal, the first terminal of the first transistor switch unit is connected to the positive terminal of the first battery, the second transistor switch unit has a first terminal, a second terminal, and a third terminal, the first terminal of the second transistor switch unit is connected to the positive terminal of the second battery, the negative terminal of the first battery, and the second terminal of the first transistor switch unit, the third transistor switch unit has a first terminal, a second terminal, and a third terminal, the first terminal of the third transistor switch unit is connected to the positive terminal of the third battery, the negative terminal of the second battery, and the second terminal of the second transistor switch unit, the second terminal of the third transistor switch unit is connected to the first processor, and the third terminal of the third transistor switch unit is connected to the negative terminal of the third battery, the first signal switch unit is provided with a first end, a second end and a third end, the first end of the first signal switch unit is connected with the third end of the first crystal switch unit, the second end of the first signal switch unit is connected with the first processor, the third end of the first signal switch unit is connected with the negative end of the third battery, the second signal switch unit is provided with a first end, a second end and a third end, the first end of the second signal switch unit is connected with the third end of the second crystal switch unit, the second end of the second signal switch unit is connected with the first processor, and the third end of the second signal switch unit is connected with the negative end of the third battery;
the first processor generates a voltage index value according to a plurality of voltage values of the battery pack measured by the voltage measurement module, and generates a voltage state information according to the voltage index value and a group of index range information, the first processor controls the voltage control module to control the charging of the battery pack according to each voltage value, so that after the battery pack restores an equilibrium state, the first processor acquires new battery state information again, and generates the same battery state information within a state duration, and the display unit displays the generated battery state information so as to be displayed for a user to refer through the display unit;
when the charging of the first battery is to be adjusted, the first processor sends a corresponding control signal to enable the first signal switch unit to be conducted, so that a small part of current flows to the first battery, and a large part of current flows to the second battery and the third battery for charging;
when the charging of the second battery is to be adjusted, the first processor sends a corresponding control signal to enable the second signal switch unit to be conducted, so that after the current flows through the first battery for charging, a small part of the current charges the second battery, and a large part of the current flows to the third battery for charging;
when the charging of the third battery is to be adjusted, the first processor sends a corresponding control signal to turn on the third transistor switch unit, so that a small part of current charges the third battery when the current flows through the first battery and the second battery for charging.
2. The UPS of claim 1, wherein the first processor subtracts the voltage value with the largest value from the voltage value with the smallest value in the voltage values and divides the subtracted value by a rated voltage reference value of the battery pack to generate the voltage index value.
3. The UPS of claim 1, wherein the first processor divides the voltage value with the smallest value and the voltage value with the largest value in the voltage values to generate the voltage index value.
4. The UPS of claim 1, wherein the first processor adds and averages the voltage values to generate a voltage average value, subtracts the voltage average value from the voltage average value to generate an absolute value, and generates a voltage calculation value according to the voltage calculation value with the largest voltage calculation value.
5. The system of claim 4, wherein the set of indicator range information includes a first indicator range in which the voltage indicator value is less than 25mV, a second indicator range in which the voltage indicator value is greater than 25mV and less than 50mV, a third indicator range in which the voltage indicator value is greater than 50mV and less than 100mV, a fourth indicator range in which the voltage indicator value is greater than 100mV and less than 200mV, and a fifth indicator range in which the voltage indicator value is greater than 200mV, and the first processor generates the corresponding voltage status information according to the indicator range corresponding to the voltage indicator value.
6. The UPS of any one of claims 1 to 5, wherein the display unit is a display and the generated battery status information is presented in text.
7. The UPS of any one of claims 1 to 5, wherein the display unit is a display and the generated battery status information is presented in a backlight color.
8. The uninterruptible power system capable of detecting battery equalization status according to any of claims 1 to 5, wherein the display unit includes a plurality of LEDs, and the generated battery status information is presented with each LED.
9. The UPS system of any one of claims 1 to 5, further comprising a second processor comprising a second signal conversion unit, a plurality of inputs and a plurality of outputs, wherein the second processor is disposed between the voltage measurement module, the voltage control module and the first processor, the second processor is configured to receive a plurality of voltage values measured by the voltage measurement module to the battery pack, and the second signal conversion unit converts each voltage value into a value to be transmitted to the first processor.
10. The system according to claim 9, further comprising a first dc transmission interface port, a second dc transmission interface port, a first communication interface port and a second communication interface port, wherein the first dc transmission interface port is connected to the input terminal of the dc-to-ac converter, the second dc transmission interface port is connected to the first terminal of the battery pack and the voltage measurement module, and the first dc transmission interface port is connected to the second dc transmission interface port; the first communication interface port is connected with the first processor and the second communication interface port respectively, and the second communication interface port is connected with the second processor.
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| CN201710041537.6A CN108336809B (en) | 2017-01-20 | 2017-01-20 | Uninterruptible power system capable of detecting battery equilibrium state |
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| CN110829584B (en) * | 2019-11-28 | 2021-11-16 | 广西电网有限责任公司南宁供电局 | Uninterrupted power source dynamic power distribution system based on battery state |
| CN113376532A (en) * | 2020-02-25 | 2021-09-10 | 北京新能源汽车股份有限公司 | Detection method, device and system for battery pack balancing module |
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