CN115411819B - BBU charge-discharge balance control method, system, equipment and storage medium - Google Patents
BBU charge-discharge balance control method, system, equipment and storage medium Download PDFInfo
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- CN115411819B CN115411819B CN202211127121.3A CN202211127121A CN115411819B CN 115411819 B CN115411819 B CN 115411819B CN 202211127121 A CN202211127121 A CN 202211127121A CN 115411819 B CN115411819 B CN 115411819B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000004044 response Effects 0.000 claims abstract description 27
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 10
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 10
- 239000004065 semiconductor Substances 0.000 claims abstract description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000032683 aging Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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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
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
-
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a BBU charge-discharge balance control method, a BBU charge-discharge balance control system, BBU charge-discharge balance control equipment and a BBU storage medium, wherein the BBU charge-discharge balance control method comprises the following steps: charging the main power supply battery pack and the standby balance battery pack, and bypassing the battery packs with the battery voltage reaching a first preset value until all the battery packs are fully charged; responding to PSU power failure, supplying power through the main power supply battery pack, and judging whether two batteries with voltage difference reaching a threshold value exist in the main power supply battery pack; in response to the existence of two batteries with voltage difference reaching a threshold value in the main power supply battery pack, controlling the on-off of MOS (metal oxide semiconductor) tubes corresponding to the two batteries to charge the battery with small voltage in the two batteries; and in response to the primary power supply battery voltage reaching a second preset value, connecting the backup balancing battery with the primary power supply battery in series to keep the output voltage stable. The invention can output a stabilized voltage power supply, can realize BBU charging and discharging energy balance, and can improve the inconsistency among single batteries.
Description
Technical Field
The invention relates to the field of power supply, in particular to a BBU charge-discharge balance control method, a BBU charge-discharge balance control system, BBU charge-discharge balance control equipment and a BBU storage medium.
Background
In order to improve the reliability of the storage system, the storage system adopts a PSU (Power Supply Unit, a power supply unit) and a BBU (Backup Battery Unit, a backup battery unit) to supply power in a combined way, the PSU is used as a main power supply, the BBU is used as an auxiliary power supply, and when the PSU is powered down due to the condition of AC power failure and the like, the BBU supplies power to the storage system, so that the unexpected loss of storage data caused by the unexpected power failure of the AC is avoided, and the immeasurable loss is caused.
The BBU of the storage system is generally a 4S3P battery pack, when the battery pack is charged by a 12V PSU through a BUCK-BOOST circuit, when the PSU is powered down due to AC power failure, the battery pack is discharged to provide an auxiliary power supply for the storage system, but the battery pack has inconsistency among single batteries, namely the battery voltage, the internal resistance, the SOC and other states, and the inconsistency among the single batteries is more obvious along with the increase of the number of charge and discharge cycles, so that the phenomenon easily causes overcharge or overdischarge of the battery, and the degradation and the aging of the battery pack are accelerated to influence the service life of the battery. The storage system needs 12V voltage stabilization power supply, when the BBU is adopted to supply power to the storage system, the voltage of the BBU is continuously reduced along with the progress of discharge, and stable voltage supply cannot be provided for the storage system.
Disclosure of Invention
In view of this, an object of the embodiments of the present invention is to provide a method, a system, a computer device and a computer readable storage medium for controlling charge and discharge balance of a BBU, which can output a voltage-stabilized 12V standby power supply, and can realize balance of charge and discharge energy of the BBU, improve inconsistency between single batteries, delay degradation and aging of a battery pack while providing reliability of a storage system, prolong service life of the battery pack, and reduce maintenance cost of the battery pack.
Based on the above object, an aspect of the embodiments of the present invention provides a method for controlling charge-discharge balance of a BBU, including the following steps: charging the main power supply battery pack and the standby balance battery pack, and bypassing the battery packs with the battery voltage reaching a first preset value until all the battery packs are fully charged; responding to PSU power failure, supplying power through the main power supply battery pack, and judging whether two batteries with voltage difference reaching a threshold value exist in the main power supply battery pack; in response to the existence of two batteries with voltage difference reaching a threshold value in the main power supply battery pack, controlling the on-off of MOS (metal oxide semiconductor) tubes corresponding to the two batteries to charge the battery with small voltage in the two batteries; and in response to the primary power supply battery voltage reaching a second preset value, connecting the backup balancing battery with the primary power supply battery in series to keep the output voltage stable.
In some embodiments, bypassing the battery pack where the battery voltage reaches a first preset value includes: and conducting the MOS tube connected in parallel with the battery pack with the battery voltage reaching a first preset value.
In some embodiments, the charging the primary power supply battery pack and the backup balancing battery pack comprises: and controlling the opening and closing of each MOS tube in the charging circuit module according to the charging voltage so as to adjust the working state of the charging circuit module.
In some embodiments, the controlling the opening and closing of each MOS transistor in the charging circuit module according to the magnitude of the charging voltage to adjust the state of the charging circuit module includes: controlling the first MOS tube to be normally on, controlling the second MOS tube to be normally off, and driving the third MOS tube and the fourth MOS tube to be alternately conducted by PWM signals in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being larger than a fourth preset value; controlling the first MOS tube and the second MOS tube to form a switching period in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being not larger than a fourth preset value; and responding to the charging voltage being smaller than a third preset value, controlling the third MOS tube to be normally closed, and the fourth MOS tube to be normally on, wherein the first MOS tube and the second MOS tube are driven by PWM signals to be alternately conducted.
In another aspect of the embodiments of the present invention, a system for controlling charge-discharge balance of a BBU is provided, including: the charging module is configured to charge the main power supply battery pack and the standby balance battery pack, and bypass the battery packs with the battery voltages reaching a first preset value until all the battery packs are fully charged; the judging module is configured to respond to power failure of the PSU, supply power through the main power supply battery pack and judge whether two batteries with voltage difference reaching a threshold value exist in the main power supply battery pack; the control module is configured to respond to the existence of two batteries with voltage difference reaching a threshold value in the main power supply battery pack, and control the on-off of MOS (metal oxide semiconductor) tubes corresponding to the two batteries so as to charge the battery with small voltage in the two batteries; and a power supply module configured to connect the backup balancing battery pack in series with the main power supply battery pack to keep an output voltage stable in response to the main power supply battery pack voltage reaching a second preset value.
In some embodiments, the charging module is configured to: and conducting the MOS tube connected in parallel with the battery pack with the battery voltage reaching a first preset value.
In some embodiments, the charging module is configured to: and controlling the opening and closing of each MOS tube in the charging circuit module according to the charging voltage so as to adjust the working state of the charging circuit module.
In some embodiments, the charging module is configured to: controlling the first MOS tube to be normally on, controlling the second MOS tube to be normally off, and driving the third MOS tube and the fourth MOS tube to be alternately conducted by PWM signals in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being larger than a fourth preset value; controlling the first MOS tube and the second MOS tube to form a switching period in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being not larger than a fourth preset value; and responding to the charging voltage being smaller than a third preset value, controlling the third MOS tube to be normally closed, and the fourth MOS tube to be normally on, wherein the first MOS tube and the second MOS tube are driven by PWM signals to be alternately conducted.
In yet another aspect of the embodiment of the present invention, there is also provided a computer apparatus, including: at least one processor; and a memory storing computer instructions executable on the processor, which when executed by the processor, perform the steps of the method as above.
In yet another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium storing a computer program which, when executed by a processor, implements the method steps as described above.
The invention has the following beneficial technical effects: the battery pack can output a voltage-stabilizing 12V standby power supply, can realize BBU charging and discharging energy balance, improve inconsistency among single batteries, delay degradation and aging of the battery pack while providing reliability of a storage system, prolong the service life of the battery pack and reduce the maintenance cost of the battery pack.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention and that other embodiments may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an embodiment of a method for BBU charge-discharge balance control provided by the present invention;
fig. 2 is a schematic diagram of an embodiment of a circuit for BBU charge-discharge equalization control provided by the present invention;
fig. 3 is a schematic diagram of an embodiment of a system for BBU charge-discharge balance control provided by the present invention;
fig. 4 is a schematic hardware structure diagram of an embodiment of a computer device for BBU charge-discharge balance control provided by the present invention;
fig. 5 is a schematic diagram of an embodiment of a computer storage medium for BBU charge-discharge balance control provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
It should be noted that, in the embodiments of the present invention, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present invention, and the following embodiments are not described one by one.
In a first aspect of the embodiment of the invention, an embodiment of a method for controlling BBU charge-discharge balance is provided. Fig. 1 is a schematic diagram of an embodiment of a method for controlling charge-discharge balance of a BBU according to the present invention. As shown in fig. 1, the embodiment of the present invention includes the following steps:
s1, charging a main power supply battery pack and a standby balance battery pack, and bypassing the battery packs with the battery voltages reaching a first preset value until all the battery packs are fully charged;
s2, responding to power failure of the PSU, supplying power through the main power supply battery pack, and judging whether two batteries with voltage difference reaching a threshold exist in the main power supply battery pack;
s3, in response to the fact that two batteries with voltage difference reaching a threshold value exist in the main power supply battery pack, controlling on-off of MOS (metal oxide semiconductor) tubes corresponding to the two batteries to charge the battery with low voltage in the two batteries; and
and S4, responding to the voltage of the main power supply battery pack reaching a second preset value, and connecting the standby balance battery pack with the main power supply battery pack in series to keep the output voltage stable.
Fig. 2 is a schematic diagram of an embodiment of a circuit for BBU charge-discharge equalization control provided by the present invention, and an embodiment of the present invention is described with reference to fig. 2. As shown in fig. 2, the circuit includes a charging circuit module, a battery balancing reconstruction module, a main power supply battery pack, a standby balancing battery pack, a balancing voltage stabilizing circuit module, and a discharging circuit module. The charging circuit module is a four-tube BUCK-BOOST circuit and comprises four NMOS tubes M1, M2, M3 and M4, an energy storage inductor L1, an input filter capacitor C1, an output filter capacitor C2, a charging control switch Sc and an anti-backflow diode D3. The battery equalization reconstruction module comprises an equalization switch array and a battery reconstruction switch array, wherein the equalization switch array comprises NMOS (N-channel metal oxide semiconductor) tubes S1-S8 and anti-backflow diodes D4-D11, and the battery reconstruction switch array comprises NMOS tubes K1-K11. The main power supply battery pack comprises B1-B4, namely a 4S3P lithium battery pack, and the working voltage is 9.5-16.4V. The standby balance battery pack comprises B5 and B6 which are 2S3P lithium battery packs, and the working voltage is 4.8V-8.2V. The equalizing voltage stabilizing circuit module is a BUCK circuit and comprises an NMOS tube M5, an energy storage inductor L2, a freewheeling diode D1 and a filter capacitor C3, and can output a 4.2V voltage stabilizing source Vo2. The discharging circuit module is a BUCK circuit and comprises an NMOS tube M6, an energy storage inductor L3, a freewheeling diode D2 and a filter capacitor C4, and can output a 12V voltage stabilizing source Vo3 to supply power for a storage system.
And charging the main power supply battery pack and the standby balance battery pack, and bypassing the battery packs with the battery voltage reaching a first preset value until all the battery packs are fully charged.
In some embodiments, bypassing the battery pack where the battery voltage reaches a first preset value includes: and conducting the MOS tube connected in parallel with the battery pack with the battery voltage reaching a first preset value. Bypass refers to connecting one channel in parallel.
When the battery pack is charged, the control MOS transistors K2, K4, K6, K8 and K10 are disconnected, the control MOS transistors K1, K3, K5, K7, K9 and K11 are conducted, the main power supply battery pack and the standby balance battery pack are connected with the access circuit, the control charging MOS transistor Sc is conducted, the BUCK-BOOST charging circuit module charges the main power supply battery pack and the standby balance battery pack at the moment, the voltage of each battery pack is monitored in real time, if any battery pack reaches the charging cut-off voltage of 4.2V, the battery pack can be considered to be fully charged at the moment, the battery balance reconstruction module is controlled, and the battery pack reaching the charging cut-off voltage is bypassed until all the battery packs are fully charged, for example: in the charging process, the battery B1 is charged to the cut-off voltage, firstly, the MOS tube K1 is disconnected, and when other switching tubes do not act yet, the charging current continues to charge the battery through the body diode of the MOS tube K1; then, the MOS tube K2 is conducted to bypass the battery B1, at the moment, the battery B1 stops charging, and if the rest batteries reach the cut-off voltage, the rest batteries are bypassed until all the batteries are fully charged. When all batteries are fully charged, the control MOS transistors K2, K4, K6 and K8 are disconnected, the control MOS transistors K1, K3, K5 and K7 are conducted, the control MOS transistors K10 are conducted, the control MOS transistors K9 and K11 are disconnected, the bypass standby balance battery pack is connected into the main power supply battery pack, and the standby balance battery pack enters a standby power initial state.
In some embodiments, the charging the primary power supply battery pack and the backup balancing battery pack comprises: and controlling the opening and closing of each MOS tube in the charging circuit module according to the charging voltage so as to adjust the working state of the charging circuit module.
In some embodiments, the controlling the opening and closing of each MOS transistor in the charging circuit module according to the magnitude of the charging voltage to adjust the state of the charging circuit module includes: controlling the first MOS tube to be normally on, controlling the second MOS tube to be normally off, and driving the third MOS tube and the fourth MOS tube to be alternately conducted by PWM signals in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being larger than a fourth preset value; controlling the first MOS tube and the second MOS tube to form a switching period in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being not larger than a fourth preset value; and responding to the charging voltage being smaller than a third preset value, controlling the third MOS tube to be normally closed, and the fourth MOS tube to be normally on, wherein the first MOS tube and the second MOS tube are driven by PWM signals to be alternately conducted.
In the initial charging state, the voltage of the battery pack is larger than 12V, at the moment, the control MOS tube M1 is normally on, the MOS tube M2 is normally closed, the MOS tube M3 and the MOS tube M4 are driven by PWM signals to be alternately conducted, and the charging circuit module works in a BOOST state to charge the whole battery pack; the battery with full charge is bypassed along with the charge equalization, the voltage of the battery pack is continuously reduced, when the voltage of the battery pack is close to 12V, the charging circuit module works in a BUCK-BOOST state, the MOS tube M1 and the MOS tube M2 are not in a normally-on and normally-off state any more, and start to switch, so that a switching period is formed, the first half period is BOOST, and the second half period is BUCK mode; when the voltage of the battery pack is smaller than 12V, the control MOS tube M4 is normally on, the control MOS tube M3 is normally off, the MOS tube M1 and the MOS tube M2 are alternately conducted under the drive of PWM signals, and the charging circuit module works in a buck state.
And responding to power failure of the PSU, supplying power through the main power supply battery pack, and judging whether two batteries with voltage differences reaching a threshold value exist in the main power supply battery pack. And in response to the fact that two batteries with voltage difference reaching a threshold value exist in the main power supply battery pack, controlling the on-off of MOS (metal oxide semiconductor) tubes corresponding to the two batteries to charge the battery with small voltage in the two batteries.
When PSU is powered off, the main power supply battery pack discharges to enter a standby state, the MOS tube M6 is driven by PWM signals to be alternately conducted, the discharging circuit module enters a working state, the voltage of the battery pack is reduced to Vo3 (12V) to supply power for the storage system, meanwhile, the MOS tube K9 is controlled to be conducted, the standby balance battery pack is connected to the balance voltage stabilizing circuit module, the MOS tube M5 is driven by PWM signals to be alternately conducted, the balance voltage stabilizing Vo2 (4.2V) is output, if the voltage of B1 in the main power supply battery pack is lowest at the moment, the voltage difference reaches 100mV, at the moment, the MOS tubes S1 and S2 are controlled to be conducted, the balance voltage stabilizing Vo2 charges B1, when the voltage difference is smaller than or equal to 20mV, the MOS tubes S1 and S2 are controlled to be disconnected, and the balance mode is exited, so that energy supplement is carried out on batteries with the lowest voltage in the battery pack, and the discharge balance of the battery pack is realized.
And in response to the voltage of the main power supply battery pack reaching a second preset value, connecting the standby balance battery pack with the main power supply battery pack in series to keep the output voltage stable.
When PSU is powered off, the main power supply battery pack discharges to enter a standby state, at the moment, MOS tubes K9 and K10 are in a conducting state, MOS tube K11 is in an off state, MOS tube M6 is driven by PWM signals to conduct alternately, a discharging circuit module enters a working state, the voltage of the battery pack is reduced to Vo3 (12V) to supply power for a storage system, when the voltage of the main power supply battery pack is close to 12V, at the moment, the PWM control signal duty ratio modulation of MOS tube M6 is maximum and cannot meet the requirement of output voltage, at the moment, MOS tube K10 is disconnected, MOS tube K11 is conducted, the main power supply battery pack and the standby balance battery pack are connected in series, the discharging circuit module is connected to provide stable 12V power for the storage system, and at the same time, the standby balance battery pack provides a balance voltage stabilizing source for the main power supply battery pack.
The invention can output a voltage-stabilizing 12V standby power supply, can realize the balance of charging and discharging energy of BBU, improves the inconsistency among single batteries, delays the degradation and aging of the battery pack, prolongs the service life of the battery pack and reduces the maintenance cost of the battery pack while providing the reliability of a storage system.
It should be noted that, in the above-mentioned method for controlling BBU charge-discharge balance, each step may be intersected, replaced, added and deleted, so that the method for controlling BBU charge-discharge balance by reasonable permutation and combination should also belong to the protection scope of the present invention, and the protection scope of the present invention should not be limited to the embodiments.
Based on the above object, in a second aspect of the embodiments of the present invention, a system for controlling charge-discharge balance of a BBU is provided. As shown in fig. 3, the system 200 includes the following modules: the charging module is configured to charge the main power supply battery pack and the standby balance battery pack, and bypass the battery packs with the battery voltages reaching a first preset value until all the battery packs are fully charged; the judging module is configured to respond to power failure of the PSU, supply power through the main power supply battery pack and judge whether two batteries with voltage difference reaching a threshold value exist in the main power supply battery pack; the control module is configured to respond to the existence of two batteries with voltage difference reaching a threshold value in the main power supply battery pack, and control the on-off of MOS (metal oxide semiconductor) tubes corresponding to the two batteries so as to charge the battery with small voltage in the two batteries; and a power supply module configured to connect the backup balancing battery pack in series with the main power supply battery pack to keep an output voltage stable in response to the main power supply battery pack voltage reaching a second preset value.
In some embodiments, the charging module is configured to: and conducting the MOS tube connected in parallel with the battery pack with the battery voltage reaching a first preset value.
In some embodiments, the charging module is configured to: and controlling the opening and closing of each MOS tube in the charging circuit module according to the charging voltage so as to adjust the working state of the charging circuit module.
In some embodiments, the charging module is configured to: controlling the first MOS tube to be normally on, controlling the second MOS tube to be normally off, and driving the third MOS tube and the fourth MOS tube to be alternately conducted by PWM signals in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being larger than a fourth preset value; controlling the first MOS tube and the second MOS tube to form a switching period in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being not larger than a fourth preset value; and responding to the charging voltage being smaller than a third preset value, controlling the third MOS tube to be normally closed, and the fourth MOS tube to be normally on, wherein the first MOS tube and the second MOS tube are driven by PWM signals to be alternately conducted.
In view of the above object, a third aspect of the embodiments of the present invention provides a computer device, including: at least one processor; and a memory storing computer instructions executable on the processor, the instructions being executable by the processor to perform the steps of: s1, charging a main power supply battery pack and a standby balance battery pack, and bypassing the battery packs with the battery voltages reaching a first preset value until all the battery packs are fully charged; s2, responding to power failure of the PSU, supplying power through the main power supply battery pack, and judging whether two batteries with voltage difference reaching a threshold exist in the main power supply battery pack; s3, in response to the fact that two batteries with voltage difference reaching a threshold value exist in the main power supply battery pack, controlling on-off of MOS (metal oxide semiconductor) tubes corresponding to the two batteries to charge the battery with low voltage in the two batteries; and S4, responding to the voltage of the main power supply battery pack reaching a second preset value, and connecting the standby balance battery pack with the main power supply battery pack in series to keep the output voltage stable.
In some embodiments, bypassing the battery pack where the battery voltage reaches a first preset value includes: and conducting the MOS tube connected in parallel with the battery pack with the battery voltage reaching a first preset value.
In some embodiments, the charging the primary power supply battery pack and the backup balancing battery pack comprises: and controlling the opening and closing of each MOS tube in the charging circuit module according to the charging voltage so as to adjust the working state of the charging circuit module.
In some embodiments, the controlling the opening and closing of each MOS transistor in the charging circuit module according to the magnitude of the charging voltage to adjust the state of the charging circuit module includes: controlling the first MOS tube to be normally on, controlling the second MOS tube to be normally off, and driving the third MOS tube and the fourth MOS tube to be alternately conducted by PWM signals in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being larger than a fourth preset value; controlling the first MOS tube and the second MOS tube to form a switching period in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being not larger than a fourth preset value; and responding to the charging voltage being smaller than a third preset value, controlling the third MOS tube to be normally closed, and the fourth MOS tube to be normally on, wherein the first MOS tube and the second MOS tube are driven by PWM signals to be alternately conducted.
As shown in fig. 4, a schematic hardware structure of an embodiment of the computer device for BBU charge-discharge balance control provided by the present invention is shown.
Taking the example of the apparatus shown in fig. 4, a processor 301 and a memory 302 are included in the apparatus.
The processor 301 and the memory 302 may be connected by a bus or otherwise, for example in fig. 4.
The memory 302 is used as a non-volatile computer readable storage medium, and can be used to store non-volatile software programs, non-volatile computer executable programs, and modules, such as program instructions/modules corresponding to the BBU charge-discharge balancing control method in the embodiments of the present application. The processor 301 executes various functional applications of the server and data processing, i.e., a method of implementing BBU charge-discharge balance control, by running nonvolatile software programs, instructions, and modules stored in the memory 302.
Memory 302 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created according to the use of the method of BBU charge-discharge balance control, and the like. In addition, memory 302 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 302 may optionally include memory located remotely from processor 301, which may be connected to the local module via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Computer instructions 303 corresponding to the method of controlling the charge-discharge balance of one or more BBUs are stored in the memory 302, which when executed by the processor 301, perform the method of controlling the charge-discharge balance of a BBU in any of the method embodiments described above.
Any one embodiment of the computer equipment for executing the BBU charge-discharge balance control method can achieve the same or similar effect as the corresponding any one embodiment of the method.
The invention also provides a computer readable storage medium storing a computer program which when executed by a processor performs a method of BBU charge-discharge equalization control.
As shown in fig. 5, a schematic diagram of an embodiment of the computer storage medium for controlling the charge-discharge balance of the BBU according to the present invention is shown. Taking a computer storage medium as shown in fig. 5 as an example, the computer readable storage medium 401 stores a computer program 402 that when executed by a processor performs the above method.
Finally, it should be noted that, as will be understood by those skilled in the art, implementing all or part of the above-mentioned methods in the embodiments may be implemented by a computer program to instruct related hardware, and the program of the BBU charge-discharge balance control method may be stored in a computer readable storage medium, where the program may include the flow of the embodiments of the above-mentioned methods when executed. The storage medium of the program may be a magnetic disk, an optical disk, a read-only memory (ROM), a random-access memory (RAM), or the like. The computer program embodiments described above may achieve the same or similar effects as any of the method embodiments described above.
The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
It should be understood that as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.
The foregoing embodiment of the present invention has been disclosed with reference to the number of embodiments for the purpose of description only, and does not represent the advantages or disadvantages of the embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, and the program may be stored in a computer readable storage medium, where the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
Those of ordinary skill in the art will appreciate that: the above discussion of any embodiment is merely exemplary and is not intended to imply that the scope of the disclosure of embodiments of the invention, including the claims, is limited to such examples; combinations of features of the above embodiments or in different embodiments are also possible within the idea of an embodiment of the invention, and many other variations of the different aspects of the embodiments of the invention as described above exist, which are not provided in detail for the sake of brevity. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the embodiments should be included in the protection scope of the embodiments of the present invention.
Claims (10)
1. The BBU charge-discharge balance control method is characterized by comprising the following steps:
charging the main power supply battery pack and the standby balance battery pack, and bypassing the battery packs with the battery voltage reaching a first preset value until all the battery packs are fully charged;
responding to PSU power failure, supplying power through the main power supply battery pack, and judging whether two batteries with voltage difference reaching a threshold value exist in the main power supply battery pack;
in response to the fact that two batteries with voltage difference reaching a threshold value exist in the main power supply battery pack, controlling on-off of MOS (metal oxide semiconductor) tubes corresponding to the two batteries to enable the standby balance battery pack to be connected into the balance voltage stabilizing circuit module to charge the battery with small voltage in the two batteries; and
and in response to the voltage of the main power supply battery pack reaching a second preset value, connecting the standby balance battery pack with the main power supply battery pack in series to keep the output voltage stable.
2. The method of claim 1, wherein bypassing the battery pack for which the battery voltage reaches a first preset value comprises:
and conducting the MOS tube connected in parallel with the battery pack with the battery voltage reaching a first preset value.
3. The method of claim 1, wherein charging the primary power supply battery pack and the backup equalization battery pack comprises:
and controlling the opening and closing of each MOS tube in the charging circuit module according to the charging voltage so as to adjust the working state of the charging circuit module.
4. The method of claim 3, wherein controlling the opening and closing of each MOS transistor in the charging circuit module according to the magnitude of the charging voltage to adjust the working state of the charging circuit module comprises:
controlling the first MOS tube to be normally on, controlling the second MOS tube to be normally off, and driving the third MOS tube and the fourth MOS tube to be alternately conducted by PWM signals in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being larger than a fourth preset value;
controlling the first MOS tube and the second MOS tube to form a switching period in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being not larger than a fourth preset value; and
and responding to the charging voltage being smaller than a third preset value, controlling the third MOS tube to be normally closed, and controlling the fourth MOS tube to be normally on, wherein the first MOS tube and the second MOS tube are driven by PWM signals to be alternately conducted.
5. A system for BBU charge-discharge balance control, comprising:
the charging module is configured to charge the main power supply battery pack and the standby balance battery pack, and bypass the battery packs with the battery voltages reaching a first preset value until all the battery packs are fully charged;
the judging module is configured to respond to power failure of the PSU, supply power through the main power supply battery pack and judge whether two batteries with voltage difference reaching a threshold value exist in the main power supply battery pack;
the control module is configured to respond to the existence of two batteries with voltage difference reaching a threshold value in the main power supply battery pack, and control the on-off of MOS (metal oxide semiconductor) tubes corresponding to the two batteries so as to enable the standby balance battery pack to be connected with the balance voltage stabilizing circuit module to charge the battery with small voltage in the two batteries; and
and the power supply module is configured to connect the standby balance battery pack with the main power supply battery pack in series to keep the output voltage stable in response to the voltage of the main power supply battery pack reaching a second preset value.
6. The system of claim 5, wherein the charging module is configured to:
and conducting the MOS tube connected in parallel with the battery pack with the battery voltage reaching a first preset value.
7. The system of claim 5, wherein the charging module is configured to:
and controlling the opening and closing of each MOS tube in the charging circuit module according to the charging voltage so as to adjust the working state of the charging circuit module.
8. The system of claim 7, wherein the charging module is configured to:
controlling the first MOS tube to be normally on, controlling the second MOS tube to be normally off, and driving the third MOS tube and the fourth MOS tube to be alternately conducted by PWM signals in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being larger than a fourth preset value;
controlling the first MOS tube and the second MOS tube to form a switching period in response to the charging voltage being larger than a third preset value and the difference value between the charging voltage and the third preset value being not larger than a fourth preset value; and
and responding to the charging voltage being smaller than a third preset value, controlling the third MOS tube to be normally closed, and controlling the fourth MOS tube to be normally on, wherein the first MOS tube and the second MOS tube are driven by PWM signals to be alternately conducted.
9. A computer device, comprising:
at least one processor; and
a memory storing computer instructions executable on the processor, which when executed by the processor, perform the steps of the method of any one of claims 1-4.
10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method of any of claims 1-4.
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| CN112886076A (en) * | 2021-01-14 | 2021-06-01 | 温州职业技术学院 | SOC balance control device and method of battery module |
| WO2022188117A1 (en) * | 2021-03-12 | 2022-09-15 | 华为数字能源技术有限公司 | Energy storage system, control method for energy storage system, and photovoltaic power generation system |
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| KR20060078967A (en) * | 2004-12-31 | 2006-07-05 | 주식회사 엠피에스 | Balance charging control method of 2nd-series battery pack |
| CN110758179A (en) * | 2019-11-11 | 2020-02-07 | 河南理工大学 | LC-L-based series battery pack equalization circuit and equalization method |
| CN112510792A (en) * | 2020-12-16 | 2021-03-16 | 安徽工程大学 | Reconfigurable converter of retired battery energy storage system and control method thereof |
| CN112886076A (en) * | 2021-01-14 | 2021-06-01 | 温州职业技术学院 | SOC balance control device and method of battery module |
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