CN113489091A - Distributed management and control system and method for storage battery pack - Google Patents
Distributed management and control system and method for storage battery pack Download PDFInfo
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- CN113489091A CN113489091A CN202110713516.0A CN202110713516A CN113489091A CN 113489091 A CN113489091 A CN 113489091A CN 202110713516 A CN202110713516 A CN 202110713516A CN 113489091 A CN113489091 A CN 113489091A
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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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a distributed management and control system of a storage battery pack, which comprises a storage battery, a voltage and current detection module, an uninterrupted power supply system and a voltage compensation system, wherein the uninterrupted power supply system comprises a battery state monitoring device, a power-on switch, a bypass switch and a bypass control unit, the voltage compensation system comprises an adjustable resistor, a compensation battery, a compensation switch, a voltage resistance sub-control unit and a DC-DC converter, the storage battery is connected in series to form the storage battery pack, when the storage battery has the problems of shortage or high temperature, the bypass control unit controls the closing of the bypass switch and the opening of the power-on switch to short-circuit the fault storage battery, the voltage resistance sub-control unit controls the closing of the compensation switch to enable the compensation battery to be connected into the storage battery pack, the output voltage and the connection resistance value are adjusted by controlling the DC-DC converter and the adjustable resistor, so that the storage battery pack can normally output 220V voltage to a direct current bus, the risks of stopping discharging of the whole storage battery and voltage loss of the direct-current bus are prevented, the constant current is ensured, and the power supply quality is improved.
Description
Technical Field
The invention relates to the technical field of storage battery stability control, in particular to a distributed management and control system and method for a storage battery pack.
Background
The storage battery is used as a backup power source of a direct current system in a transformer substation, 220V voltage is supplied to a direct current bus when a charger is powered off, the voltage of the storage battery is 2.1V, a total of 104 storage batteries in a storage battery chamber form 220V, the discharge cut-off threshold of a single storage battery is generally 1.8V, the cut-off threshold of a storage battery pack is determined by the nominal voltage of the direct current bus, and the discharge is stopped when the discharge cut-off voltage of the single storage battery or the whole group of storage batteries is reached.
After the storage batteries leave a factory, the capacity of individual storage batteries is low due to performance reduction in the unified discharging and charging process, and a barrel effect occurs, namely, the individual storage batteries are firstly reduced to a voltage threshold value in the discharging process, so that the whole group of storage batteries are suspended to be discharged.
Disclosure of Invention
Therefore, the invention provides a distributed management and control system and method for a storage battery pack, which can monitor the discharge state of the storage battery, carry out short circuit on a fault storage battery, and supplement discharge to ensure the continuous discharge of the storage battery pack and reduce the risk of power loss of a bus.
The technical scheme of the invention is realized as follows:
a distributed management and control system of a storage battery pack comprises storage batteries, a voltage and current detection module, an uninterruptible power supply system and a voltage compensation system, wherein the storage batteries are connected in series to form the storage battery pack, and the voltage and current detection module is connected in series with the storage battery pack; the uninterruptible power supply system comprises a battery state monitoring device, an electrifying switch, a bypass switch and a bypass control unit, wherein the storage battery is connected with the electrifying switch in series, the battery state monitoring device and the bypass switch are respectively connected with two ends of the storage battery and the electrifying switch in parallel, the battery state monitoring device comprises a voltage sensor and a temperature sensor, and the bypass control unit is respectively electrically connected with the bypass switch, the voltage sensor and the temperature sensor; the voltage compensation system comprises an adjustable rheostat, a compensation battery, a compensation switch, a voltage resistance sub-control unit and a DC-DC converter, wherein the adjustable rheostat is connected with the storage battery in series, the compensation switch, the compensation battery and the DC-DC converter are connected in series and then connected to two ends of the adjustable rheostat in parallel, and the voltage resistance sub-control unit is electrically connected with the voltage current detection module, the bypass control unit, the compensation switch, the DC-DC converter and the adjustable rheostat respectively.
Preferably, the bypass control unit includes a voltage equalization degree calculation unit and a temperature critical amount calculation unit, the voltage equalization degree calculation unit is electrically connected to the voltage sensor, the temperature critical amount calculation unit is electrically connected to the temperature sensor, and the voltage equalization degree calculation unit and the temperature critical amount calculation unit respectively control the bypass switch.
Preferably, the voltage and resistance sub-control unit comprises a voltage difference value calculation unit, a current difference value calculation unit, a voltage PI regulation unit, a resistance PI regulation unit and a switch control unit, wherein the voltage difference value calculation unit is electrically connected with the voltage and current detection module and the voltage PI regulation unit respectively, the voltage PI regulation unit is electrically connected with the DC-DC converter, the current difference value calculation unit is electrically connected with the voltage and current detection module and the resistance PI regulation unit respectively, the resistance PI regulation unit is electrically connected with the adjustable variable resistor, and the switch control unit is electrically connected with the bypass control unit and the compensation switch respectively.
Preferably, the system further comprises a data transmission terminal, a host and a background server, wherein the data transmission terminal is respectively in data connection with the bypass control unit and the voltage resistance sub-control unit, and the host is respectively in data connection with the background server and the data transmission terminal.
Preferably, the system further comprises a second direct current system, a switch and a switching control unit, wherein the storage battery pack and the second direct current system are connected to the power supply circuit through the switch, and the switching control unit is electrically connected with the switch and the bypass control unit respectively.
A distributed management and control method for a storage battery pack comprises the following steps:
step S1, the voltage sensor and the temperature sensor respectively collect voltage data and temperature data of the storage battery and transmit the voltage data and the temperature data to the bypass control unit;
step S2, the bypass control unit respectively carries out balance index calculation and temperature critical quantity calculation on the received voltage data and temperature data, and controls the closing of a bypass switch and the opening of an electrified switch when the calculation result of the bypass control unit is that the storage battery has a fault, so that the storage battery connected with the bypass switch in parallel is short-circuited;
step S3, the bypass control unit sends a short-circuit signal of the storage battery to the voltage resistance sub-control unit;
and step S4, the voltage resistance sub-control unit controls the compensation switch to be closed, meanwhile, the voltage resistance sub-control unit calculates according to the voltage value and the current value transmitted by the voltage current detection module, and adjusts the output voltage of the DC-DC converter and the access resistance value of the adjustable resistor according to the calculation result.
Preferably, the specific step of step S2 includes:
step S21, the bypass control unit establishes a storage battery equilibrium index and a single storage battery temperature critical quantity index according to storage battery maintenance standards and parameters;
step S22, the bypass control unit calculates the received voltage data, compares the calculated voltage data with the balance degree index, and turns to step S24 when the comparison result is that the storage battery has low-level faults;
step S23, the bypass control unit calculates the received temperature data, compares the temperature data with the critical amount index of the single storage battery temperature, and goes to step S24 when the comparison result is that the storage battery has high-temperature fault;
step S24, the bypass control unit controls the closing of the bypass switch and the opening of the power-on switch, so that the storage battery connected with the bypass switch in parallel is short-circuited;
preferably, the specific step of step S4 includes:
step S41, after the voltage resistance sub-control unit receives the storage battery short-circuit signal sent by the bypass control unit, the compensation switch is controlled to be closed, so that the compensation battery compensates the voltage value of the fault storage battery which is missed by short circuit;
step S42, the voltage resistance sub-control unit compares the voltage value transmitted by the voltage current detection module with the standard voltage and then calculates to obtain a voltage difference value, and adjusts the output voltage of the DC-DC converter according to the voltage difference value;
and step S43, the voltage resistance sub-control unit compares the current value transmitted by the voltage current detection module with the standard current and then calculates to obtain a current difference value, and adjusts the access resistance value of the adjustable rheostat according to the current difference value until the current is constant.
Preferably, the voltage difference and the current difference are calculated in steps S42 and S43 by using a PI regulation algorithm.
Preferably, the method further comprises a step S5, when the battery short-circuit signal sent by the bypass control unit is greater than a preset threshold or the compensated voltage is too much, the first dc system where the battery pack is located is cut off, and another dc system is connected to supply power.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a distributed management and control system and a method of a storage battery pack, which independently and distributively manage and control all storage batteries in the storage battery pack, wherein a battery state monitoring device is arranged to monitor the state of the storage batteries, when the storage batteries have faults, the storage batteries can ensure normal discharge of other storage batteries after short circuit of the fault storage batteries by controlling the closing of a bypass switch and the opening of a power switch, prevent the storage batteries from completely stopping discharge caused by the existence of the fault storage batteries, and after the short circuit of the fault storage batteries, the compensation batteries are connected into a circuit where the storage battery pack is located by controlling a compensation switch, and adjust the voltage and resistance values at two ends of an adjustable rheostat according to the voltage and current values, thereby compensating the voltage in a circuit where the storage battery pack is located, so as to ensure the constant whole discharge voltage and discharge current of the storage battery pack, the bus is ensured not to lose power.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic diagram of a distributed management and control system for a storage battery pack according to the present invention;
fig. 2 is a schematic diagram of a voltage resistance sub-control unit of a distributed management and control system of a storage battery pack according to the present invention;
fig. 3 is a schematic diagram of a dc system switching of a distributed management and control system of a storage battery pack according to the present invention;
fig. 4 is a flow chart of a distributed management and control method for a storage battery pack according to the present invention;
in the figure, 1 is a storage battery, 2 is a voltage and current detection module, 3 is an uninterruptible power supply system, 4 is a voltage compensation system, 5 is a battery state monitoring device, 6 is a bypass switch, 7 is a bypass control unit, 8 is a voltage sensor, 9 is a temperature sensor, 10 is an adjustable resistor, 11 is a compensation battery, 12 is a compensation switch, 13 is a voltage and resistance sub-control unit, 14 is a DC-DC converter, 15 is a voltage equalization calculation unit, 16 is a temperature critical quantity calculation unit, 17 is a voltage difference calculation unit, 18 is a current difference calculation unit, 19 is a voltage PI adjustment unit, 20 is a resistance PI adjustment unit, 21 is a switch control unit, 22 is a data transmission terminal, 23 is a host, 24 is a background server, 25 is a first DC system, 26 is a second DC system, 27 is a change-over switch, 28 is a change-over control unit, and 29 is a power-on switch.
Detailed Description
For a better understanding of the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described with reference to the accompanying drawings.
Referring to fig. 1 to 3, the distributed management and control system for the storage battery pack provided by the invention comprises a storage battery 1, a voltage and current detection module 2, an uninterruptible power supply system 3 and a voltage compensation system 4, wherein the storage battery 1 is connected in series to form the storage battery pack, and the voltage and current detection module 2 is connected in series with the storage battery pack; the uninterruptible power supply system 3 comprises a battery state monitoring device 5, an electrifying switch 29, a bypass switch 6 and a bypass control unit 7, the storage battery 1 is connected with the electrifying switch 29 in series, the bypass switch 6 of the battery state monitoring device 5 is respectively connected with two ends of the storage battery 1 and the electrifying switch 29 in parallel, the battery state monitoring device 5 comprises a voltage sensor 8 and a temperature sensor 9, and the bypass control unit 7 is respectively electrically connected with the bypass switch 6, the voltage sensor 8 and the temperature sensor 9; the voltage compensation system 4 includes an adjustable varistor 10, a compensation battery 11, a compensation switch 12, a voltage resistance sub-control unit 13, and a DC-DC converter 14, wherein the adjustable varistor 10 is connected in series with the battery pack, the compensation switch 12, the compensation battery 11, and the DC-DC converter 14 are connected in series and then connected in parallel to two ends of the adjustable varistor 10, and the voltage resistance sub-control unit 13 is electrically connected to the voltage current detection module 2, the bypass control unit 7, the compensation switch 12, the DC-DC converter 14, and the adjustable varistor 10, respectively.
The invention relates to a distributed management and control system of a storage battery pack, which adopts 104 storage batteries 1 which are connected in series, wherein the output voltage of each storage battery 1 is 2.1V, the total voltage of the formed storage battery pack is 220V, the storage battery pack forms a first direct current system 25 which can supply power for a direct current load on a direct current bus, the state of each storage battery 1 can be monitored by an arranged uninterrupted power supply system 3, when the problems of shortage, high temperature and the like of the storage batteries 1 are monitored, the failed storage battery 1 is short-circuited, the lost voltage is compensated by a voltage compensation system 4, the normal discharge of other storage batteries 1 in the storage battery pack is ensured, the discharge voltage received by the direct current bus is ensured to be stable, and the voltage loss of the direct current bus is prevented.
For the uninterrupted power supply system 3, it includes the power-on switch 29, the battery state monitoring device 5, the bypass switch 6 and the bypass control unit 7, when the accumulator 1 is in normal use, the power-on switch 29 is in the closed state, the number of the battery state monitoring device 5 and the bypass switch 6 is the same as the number of the accumulator 1, namely 104, the battery state monitoring device 5 and the bypass switch 6 are respectively connected in parallel at the two ends of the accumulator 1, the voltage sensor 8 and the temperature sensor 9 in the battery state monitoring device 5 can collect the voltage and the temperature of the accumulator 1, and transmit the collected data to the bypass control unit 7, if the accumulator 1 has the shortage or high temperature problem, the bypass control unit 7 controls the bypass switch 6 connected in parallel with the fault accumulator 1 to be closed, and controls the power-on switch 29 to be opened at the same time, so that the accumulator 1 is short-circuited, thereby the fault accumulator 1 can be removed from the first dc system 25, the fault storage battery 1 is prevented from influencing the discharge of other normal storage batteries 1, and the direct-current bus can normally receive the electric energy transmitted by the storage battery pack.
After controlling the bypass switch 6 to be closed, the bypass control unit 7 may simultaneously send a short-circuit signal of the storage battery 1 to a voltage and resistance sub-control unit 13 in the voltage compensation system 4, where the voltage and resistance sub-control unit 13 first controls the compensation switch 12 to be closed, so that the compensation battery 11 may be connected to the storage battery pack, the voltage of the compensation battery 11 is stepped up and stepped down by the DC-DC converter 14 and then applied to two ends of the adjustable resistor 10 for voltage compensation, and the voltage and resistance sub-control unit 13 may correspondingly control the voltage output by the DC-DC converter 14 and the resistance value of the adjustable resistor 10 according to the number of the short-circuit signals of the storage battery 1 transmitted by the bypass control unit 7, so that a series circuit where the storage battery pack and the adjustable resistor 10 are located may provide a 220V voltage for the DC bus, and guarantee the current to be constant.
Preferably, the bypass control unit 7 includes a voltage balance calculation unit 15 and a temperature threshold amount calculation unit 16, the voltage balance calculation unit 15 is electrically connected to the voltage sensor 8, the temperature threshold amount calculation unit 16 is electrically connected to the temperature sensor 9, and the voltage balance calculation unit 15 and the temperature threshold amount calculation unit 16 control the bypass switch 6, respectively.
The battery state monitoring device 5 collects voltage data and temperature data of the storage battery 1, the collected data is used for judging the undervoltage and the high temperature of the bypass control unit 7, therefore, a voltage balance degree calculating unit 15 and a temperature critical quantity calculating unit 16 are arranged in the bypass control unit 7, the voltage balance degree calculating unit 15 carries out balance degree index calculation according to the voltage data, the temperature critical quantity calculating unit 16 carries out temperature critical quantity index calculation according to the temperature data, and finally the bypass control unit 7 can carry out short circuit on the undervoltage or high-temperature storage battery 1 through the power-on switch 29 and the bypass switch 6.
Preferably, the voltage and resistance sub-control unit 13 includes a voltage difference calculation unit 17, a current difference calculation unit 18, a voltage PI adjustment unit 19, a resistance PI adjustment unit 20, and a switch control unit 21, the voltage difference calculation unit 17 is electrically connected to the voltage and current detection module 2 and the voltage PI adjustment unit 19, the voltage PI adjustment unit 19 is electrically connected to the DC-DC converter 14, the current difference calculation unit 18 is electrically connected to the voltage and current detection module 2 and the resistance PI adjustment unit 20, the resistance PI adjustment unit 20 is electrically connected to the adjustable varistor 10, and the switch control unit 21 is electrically connected to the bypass control unit 7 and the compensation switch 12.
After receiving the short-circuit signal of the storage battery 1 sent by the bypass control unit 7, the voltage and resistance sub-control unit 13 firstly controls the compensation switch 12 to be closed through the switch control unit 21 therein, so that the compensation battery 11 can be connected to the first DC system 25, then the voltage difference value calculation unit 17 and the current difference value calculation unit 18 respectively perform difference value calculation according to the data transmitted by the voltage and current detection module 2, the obtained voltage difference value and current difference value are respectively transmitted to the voltage PI adjustment unit 19 and the resistance PI adjustment unit 20, and after calculation, the voltage PI adjustment unit 19 and the resistance PI adjustment unit 20 can respectively adjust the output voltage of the DC-DC converter 14 and the resistance value of the adjustable resistor 10, so that the voltage and the current of the first DC system 25 are constant.
Preferably, the system further comprises a data transmission terminal 22, a host 23 and a background server 24, wherein the data transmission terminal 22 is respectively in data connection with the bypass control unit 7 and the voltage resistance sub-control unit 13, and the host 23 is respectively in data connection with the background server 24 and the data transmission terminal 22.
Preferably, the system further comprises a second dc system 26, a switch 27 and a switching control unit 28, the battery pack and the second dc system 26 are connected to the power supply circuit through the switch 27, and the switching control unit 28 is electrically connected to the switch 27 and the bypass control unit 7, respectively.
The invention also arranges a second direct current system 26 for connecting with the direct current bus to carry out backup power supply, when the number of the fault storage batteries 1 in the storage battery pack is large, the short circuit signals of the storage batteries 1 sent to the switching control unit 28 by the bypass control unit 7 are also large, at this moment, the switching control unit 28 controls the action of the switch 27, so that the first direct current system 25 where the storage battery pack is arranged is cut off, at this moment, the second direct current system 26 supplies power for the direct current bus, and the direct current bus is ensured not to lose power.
The second dc system 25 also includes 104 batteries, and the second dc system 25 can be used as a backup power source.
Referring to fig. 4, the distributed management and control method for the storage battery pack of the present invention includes the following steps:
step S1, the voltage sensor 8 and the temperature sensor 9 respectively collect voltage data and temperature data of the storage battery 1, and transmit the voltage data and the temperature data to the bypass control unit 7;
the voltage sensor 8 and the temperature sensor 9 respectively collect voltage data and temperature data of the storage battery 1, and transmit the voltage data and the temperature data to the bypass control unit 7 through a communication line.
Step S2, the bypass control unit 7 performs the equalization index calculation and the temperature threshold calculation on the received voltage data and temperature data, respectively, and controls the bypass switch 6 to be closed and the energizing switch 29 to be opened when the calculation result of the bypass control unit 7 is that the battery 1 is in failure, so as to short-circuit the battery 1 connected in parallel with the bypass switch 6;
the bypass control unit 7 is a terminal installed in the storage battery 1 room, and has multiple groups of serial ports to realize the access of the voltage, the temperature and the bypass switch 6 of the storage battery 1, and to complete the calculation of the voltage data and the temperature data and the control of the bypass switch 6.
The specific steps of step S2 include:
step S21, the bypass control unit 7 establishes an equilibrium index of the storage battery 1 and a temperature critical quantity index of the single storage battery 1 according to the maintenance standard and parameters of the storage battery 1;
step S22, the bypass control unit 7 calculates the received voltage data, compares the calculated voltage data with the balance degree index, and switches to step S24 when the comparison result is that the storage battery 1 has low-level faults;
step S23, the bypass control unit 7 calculates the received temperature data, compares the temperature data with the temperature critical quantity index of the single storage battery 1, and goes to step S24 when the comparison result is that the storage battery 1 has a high-temperature fault;
step S24, the bypass control means 7 controls the bypass switch 6 to be closed and the energization switch 29 to be opened, so that the battery 1 connected in parallel to the bypass switch 6 is short-circuited;
the bypass control unit 7 independently calculates voltage data and temperature data, after receiving the voltage data and the temperature data sent by the voltage sensor 8 and the temperature sensor 9, calculates and compares the voltage data and the temperature data with the balance index of the storage battery 1 and the temperature critical quantity index of the single storage battery 1 to judge whether the storage battery 1 has under-capacity and high-temperature conditions, when the storage battery 1 has the under-capacity condition, the bypass switch 6 is closed after the storage battery 1 continues to continuously discharge for 60 seconds, the power-on switch 29 is opened to short-circuit the storage battery 1, and when the storage battery 1 has the high-temperature condition, the storage battery 1 is immediately short-circuited through the bypass switch 6 and the power-on switch 29.
Step S3, the bypass control unit 7 sends a short-circuit signal of the storage battery 1 to the voltage resistance sub-control unit 13;
step S4, the voltage-resistance sub-control unit 13 controls the compensation switch 12 to close, calculates according to the voltage value and the current value transmitted by the voltage-current detection module 2, and adjusts the output voltage of the DC-DC converter 14 and the access resistance value of the adjustable resistor 10 according to the calculation result.
The specific steps of step S4 include:
step S41, after the voltage resistance sub-control unit 13 receives the short-circuit signal of the storage battery 1 sent by the bypass control unit 7, the compensation switch 12 is controlled to be closed, so that the compensation battery 11 compensates the voltage value of the failed storage battery 1 missing due to short circuit; for example, when there is a short circuit of the secondary battery 1, the voltage of 2.1V is lost, and at this time, the 2.1V voltage is compensated by controlling the compensation battery 11 and the DC-DC converter 14, and then the voltage regulation process of step S42 is performed;
step S42, the voltage resistance sub-control unit 13 compares the voltage value transmitted by the voltage current detection module 2 with the standard voltage, calculates a voltage difference value, and adjusts the output voltage of the DC-DC converter 14 according to the voltage difference value by using a PI adjustment algorithm;
step S43, the voltage resistance sub-control unit 13 compares the current value transmitted by the voltage current detection module 2 with the standard current and then calculates a current difference value, and adjusts the access resistance value of the adjustable resistor 10 according to the current difference value by using a PI adjustment algorithm until the current is constant.
When the storage battery 1 exits due to overhigh temperature or overlow voltage, a signal is transmitted to the voltage and resistance sub-control unit 13 through the bypass control unit 7, the voltage and resistance sub-control unit 13 controls the DC-DC converter 14 to output 2.1V voltage, the voltage and resistance sub-control unit 13 controls the compensation switch 12 to be closed at the same time, the voltage and current detection module 2 transmits voltage data to the voltage and resistance sub-control unit 13, the voltage and resistance sub-control unit 13 calculates the difference value between the actual voltage and the standard voltage, and the DC-DC converter 14 is controlled to output the voltage through a PI algorithm until the bus voltage reaches 220V.
After the voltage adjusting process is finished, the resistance is calculated according to the resistance voltage and the specified current, the resistance value is adjusted, the voltage and current detection module 2 transmits current data in the discharging process of the storage battery 1 to the voltage and resistance sub-control unit 13, the voltage and resistance sub-control unit 13 calculates the difference value between the actual current and the standard current, and the resistance value of the adjustable resistor 10 is adjusted through a PI adjusting algorithm until the constant current value reaches the specified discharging time of the storage battery pack.
The dynamic voltage-regulating and current-converting process is continued until the discharge is finished.
The voltage regulation and the resistance regulation adopt a PI (proportional integral) regulation algorithm, and the dynamic regulation is circularly carried out by setting a closed-loop regulation mode, so that the finally output voltage and current can compensate and replace the short-circuited fault storage battery.
Preferably, the method further includes step S5, when the short-circuit signal of the battery 1 sent by the bypass control unit 7 is greater than a preset threshold or the compensated voltage is too much, the first dc system 25 where the battery pack is located is cut off, and another dc system is connected for supplying power.
The switching control unit 28 stores the maximum threshold of the short circuit amount of the storage battery 1, which is generally set to 10, when the short circuit signal of the storage battery 1 sent by the bypass control unit 7 is greater than the maximum threshold, the first dc system 25 where the storage battery pack is located can be switched off, then the second dc system 26 is connected to the dc bus for power supply, so that no power loss risk of the dc bus occurs, and when the voltage of the dc bus decreases to below 90% of the rated voltage in the discharging process of the first dc system 25, the second dc system 26 is switched to supply power.
After switching to the second dc system 26, the faulty battery 1 and the bypass switch 6 in the first dc system 25 are self-checked by self-checking to find out the fault point.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A distributed management and control system of a storage battery pack is characterized by comprising storage batteries, a voltage and current detection module, an uninterruptible power supply system and a voltage compensation system, wherein the storage batteries are connected in series to form the storage battery pack, and the voltage and current detection module is connected in series with the storage battery pack; the uninterruptible power supply system comprises a battery state monitoring device, an electrifying switch, a bypass switch and a bypass control unit, wherein the storage battery is connected with the electrifying switch in series, the battery state monitoring device and the bypass switch are respectively connected with two ends of the storage battery and the electrifying switch in parallel, the battery state monitoring device comprises a voltage sensor and a temperature sensor, and the bypass control unit is respectively electrically connected with the bypass switch, the voltage sensor and the temperature sensor; the voltage compensation system comprises an adjustable rheostat, a compensation battery, a compensation switch, a voltage resistance sub-control unit and a DC-DC converter, wherein the adjustable rheostat is connected with the storage battery in series, the compensation switch, the compensation battery and the DC-DC converter are connected in series and then connected to two ends of the adjustable rheostat in parallel, and the voltage resistance sub-control unit is electrically connected with the voltage current detection module, the bypass control unit, the compensation switch, the DC-DC converter and the adjustable rheostat respectively.
2. The distributed management and control system for the storage battery pack according to claim 1, wherein the bypass control unit includes a voltage equalization degree calculation unit and a temperature critical amount calculation unit, the voltage equalization degree calculation unit is electrically connected to the voltage sensor, the temperature critical amount calculation unit is electrically connected to the temperature sensor, and the voltage equalization degree calculation unit and the temperature critical amount calculation unit respectively control the bypass switch.
3. The distributed management and control system of claim 1, wherein the voltage and resistance sub-control unit comprises a voltage difference calculation unit, a current difference calculation unit, a voltage PI adjustment unit, a resistance PI adjustment unit, and a switch control unit, the voltage difference calculation unit is electrically connected to the voltage and current detection module and the voltage PI adjustment unit, the voltage PI adjustment unit is electrically connected to the DC-DC converter, the current difference calculation unit is electrically connected to the voltage and current detection module and the resistance PI adjustment unit, the resistance PI adjustment unit is electrically connected to the adjustable resistor, and the switch control unit is electrically connected to the bypass control unit and the compensation switch.
4. The distributed management and control system for the storage battery pack according to claim 1, further comprising a data transmission terminal, a host and a background server, wherein the data transmission terminal is respectively in data connection with the bypass control unit and the voltage resistance sub-control unit, and the host is respectively in data connection with the background server and the data transmission terminal.
5. The distributed management and control system for the storage battery pack according to claim 1, further comprising a second direct current system, a switch and a switching control unit, wherein the storage battery pack and the second direct current system are connected to the power supply circuit through the switch, and the switching control unit is electrically connected to the switch and the bypass control unit respectively.
6. A distributed management and control method for a storage battery pack according to any one of the systems of claims 1-5, characterized by comprising the following steps:
step S1, the voltage sensor and the temperature sensor respectively collect voltage data and temperature data of the storage battery and transmit the voltage data and the temperature data to the bypass control unit;
step S2, the bypass control unit respectively carries out balance index calculation and temperature critical quantity calculation on the received voltage data and temperature data, and controls the closing of a bypass switch and the opening of an electrified switch when the calculation result of the bypass control unit is that the storage battery has a fault, so that the storage battery connected with the bypass switch in parallel is short-circuited;
step S3, the bypass control unit sends a short-circuit signal of the storage battery to the voltage resistance sub-control unit;
and step S4, the voltage resistance sub-control unit controls the compensation switch to be closed, meanwhile, the voltage resistance sub-control unit calculates according to the voltage value and the current value transmitted by the voltage current detection module, and adjusts the output voltage of the DC-DC converter and the access resistance value of the adjustable resistor according to the calculation result.
7. The distributed management and control method for the storage battery pack according to claim 6, wherein the specific step of the step S2 includes:
step S21, the bypass control unit establishes a storage battery equilibrium index and a single storage battery temperature critical quantity index according to storage battery maintenance standards and parameters;
step S22, the bypass control unit calculates the received voltage data, compares the calculated voltage data with the balance degree index, and turns to step S24 when the comparison result is that the storage battery has low-level faults;
step S23, the bypass control unit calculates the received temperature data, compares the temperature data with the critical amount index of the single storage battery temperature, and goes to step S24 when the comparison result is that the storage battery has high-temperature fault;
in step S24, the bypass control unit controls the bypass switch to be closed and the energization switch to be opened, so that the battery connected in parallel with the bypass switch is short-circuited.
8. The distributed management and control method for the storage battery pack according to claim 6, wherein the specific step of the step S4 includes:
step S41, after the voltage resistance sub-control unit receives the storage battery short-circuit signal sent by the bypass control unit, the compensation switch is controlled to be closed, so that the compensation battery compensates the voltage value of the fault storage battery which is missed by short circuit;
step S42, the voltage resistance sub-control unit compares the voltage value transmitted by the voltage current detection module with the standard voltage and then calculates to obtain a voltage difference value, and adjusts the output voltage of the DC-DC converter according to the voltage difference value;
and step S43, the voltage resistance sub-control unit compares the current value transmitted by the voltage current detection module with the standard current and then calculates to obtain a current difference value, and adjusts the access resistance value of the adjustable rheostat according to the current difference value until the current is constant.
9. The distributed management and control method for the storage battery pack according to claim 8, wherein a PI regulation algorithm is adopted for calculating the voltage difference and the current difference in steps S42 and S43.
10. The distributed management and control method for the storage battery pack according to claim 6, further comprising a step S5, when the storage battery short-circuit signal sent by the bypass control unit is greater than a preset threshold or the compensated voltage is too much, cutting off a first dc system where the storage battery pack is located, and switching in another dc system for supplying power.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114977504A (en) * | 2022-06-02 | 2022-08-30 | 国网山东省电力公司泰安供电公司 | Bypass load switch control system |
| CN116760150A (en) * | 2023-08-14 | 2023-09-15 | 安徽博诺思信息科技有限公司 | Fault-tolerant operation method and device for single storage battery fault |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1469525A (en) * | 2002-07-16 | 2004-01-21 | 飞瑞股份有限公司 | On-line interactive UPS device and its power supply method |
| WO2013015162A1 (en) * | 2011-07-27 | 2013-01-31 | 三菱自動車工業株式会社 | Battery-device charging and discharging system |
| CN104362695A (en) * | 2014-11-10 | 2015-02-18 | 中南民族大学 | Series-battery-pack equalization system and control method thereof |
| CN204452306U (en) * | 2014-12-23 | 2015-07-08 | 山东精久科技有限公司 | A kind of vehicle-mounted self powered supply system |
| CN111555433A (en) * | 2020-04-16 | 2020-08-18 | 广州市仟顺电子设备有限公司 | Bus coupler device of direct current system and control method thereof |
| CN211351821U (en) * | 2019-10-30 | 2020-08-25 | 武汉市豪迈电力自动化技术有限责任公司 | Storage battery pack open circuit monitoring and voltage loss compensation device |
| CN212518452U (en) * | 2020-06-30 | 2021-02-09 | 浙江省星炬科技有限公司 | Storage battery remote discharging system based on feed network inversion |
-
2021
- 2021-06-25 CN CN202110713516.0A patent/CN113489091B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1469525A (en) * | 2002-07-16 | 2004-01-21 | 飞瑞股份有限公司 | On-line interactive UPS device and its power supply method |
| WO2013015162A1 (en) * | 2011-07-27 | 2013-01-31 | 三菱自動車工業株式会社 | Battery-device charging and discharging system |
| CN104362695A (en) * | 2014-11-10 | 2015-02-18 | 中南民族大学 | Series-battery-pack equalization system and control method thereof |
| CN204452306U (en) * | 2014-12-23 | 2015-07-08 | 山东精久科技有限公司 | A kind of vehicle-mounted self powered supply system |
| CN211351821U (en) * | 2019-10-30 | 2020-08-25 | 武汉市豪迈电力自动化技术有限责任公司 | Storage battery pack open circuit monitoring and voltage loss compensation device |
| CN111555433A (en) * | 2020-04-16 | 2020-08-18 | 广州市仟顺电子设备有限公司 | Bus coupler device of direct current system and control method thereof |
| CN212518452U (en) * | 2020-06-30 | 2021-02-09 | 浙江省星炬科技有限公司 | Storage battery remote discharging system based on feed network inversion |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114977504A (en) * | 2022-06-02 | 2022-08-30 | 国网山东省电力公司泰安供电公司 | Bypass load switch control system |
| CN114977504B (en) * | 2022-06-02 | 2023-10-24 | 国网山东省电力公司泰安供电公司 | Bypass load switch control system |
| CN116760150A (en) * | 2023-08-14 | 2023-09-15 | 安徽博诺思信息科技有限公司 | Fault-tolerant operation method and device for single storage battery fault |
| CN116760150B (en) * | 2023-08-14 | 2023-11-14 | 安徽博诺思信息科技有限公司 | Fault-tolerant operation method and device for single storage battery fault |
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