CN111193281A - User side distributed energy storage system - Google Patents
User side distributed energy storage system Download PDFInfo
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- CN111193281A CN111193281A CN202010099279.9A CN202010099279A CN111193281A CN 111193281 A CN111193281 A CN 111193281A CN 202010099279 A CN202010099279 A CN 202010099279A CN 111193281 A CN111193281 A CN 111193281A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 21
- 238000002955 isolation Methods 0.000 claims abstract description 24
- 230000017525 heat dissipation Effects 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims description 52
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a user side distributed energy storage system which comprises a control cabinet, wherein the control cabinet comprises a cabinet body, the front end surface of the cabinet body is hinged with a cabinet door, one side of the cabinet body is provided with a heat dissipation groove, the inner side of the heat dissipation groove is provided with a filter screen, the upper end part of one side of the cabinet body is provided with a mains supply input end, the bottom of the inner cavity of the cabinet body is provided with a control module, a plurality of electric placing plates are arranged in the inner cavity of the cabinet body from top to bottom, and an isolation transformer, a PCS inverter, a contact relay and a battery pack are arranged on the electric placing plates.
Description
Technical Field
The invention relates to the technical field of energy storage systems, in particular to a user-side distributed energy storage system.
Background
The user side energy storage System mainly comprises four important components of a battery pack, a Power Control System (PCS), a controller and a battery management System. The control logic when the system runs is as follows: charging is performed with a valley period and discharging is performed with a tip/peak period. The user can set the time quantum and the power size of charging/discharging in the main control unit, and the main control unit can issue an instruction to the inversion unit at a corresponding time point, and the inversion unit executes the instruction of charging or discharging.
The existing distributed energy storage system has low charging and discharging efficiency and poor energy-saving effect, so that improvement is necessary.
Disclosure of Invention
The invention aims to provide a user-side distributed energy storage system to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a user side distributed energy storage system comprises a control cabinet, wherein the control cabinet comprises a cabinet body, a cabinet door is hinged to the front end face of the cabinet body, a heat dissipation groove is formed in one side of the cabinet body, a filter screen is installed on the inner side of the heat dissipation groove, a mains supply input end is formed in the upper end portion of one side of the cabinet body, a control module is installed at the bottom of the inner cavity of the cabinet body, a plurality of electric placing plates are installed in the inner cavity of the cabinet body from top to bottom, and a contact relay, an isolation transformer, a PCS inverter and a battery pack are;
the control module is provided with a main control chip, a battery management unit, a charging unit, a discharging unit and a charging and discharging control unit, the input end of the contact relay is connected with an external power grid, the output end of the contact relay is connected with a battery pack through an isolation transformer and a PCS inverter, the battery pack, the contact relay and the PCS inverter are connected with the main control chip, the battery pack is connected with an external load through the PCS inverter, the charging unit and the discharging unit are respectively connected with the main control chip, and the charging and discharging control unit is respectively connected with the charging unit, the discharging unit and the main control; the battery management unit is used for collecting and feeding back voltage, current, temperature and electric quantity signals of the battery, and the charging unit is used for controlling charging of the rechargeable battery pack; the discharging unit is used for controlling the discharging of the battery pack; the charging and discharging control unit is used for switching and controlling the charging and discharging of the battery pack.
Preferably, the battery management unit comprises a microprocessor, a CAN transceiving circuit unit, a power supply module, a balance management module unit, a voltage/current acquisition unit, a temperature acquisition module and an electric quantity metering unit, the microprocessor is respectively connected with the power supply module, the balance management module unit, the voltage/current acquisition unit and the temperature acquisition module, the microprocessor is connected with the main control chip through the CAN transceiving circuit unit, and the CAN transceiving circuit unit is used for transmitting voltage/current data and temperature data of the battery pack; wherein the power supply module is used for supplying power to a battery management system; the voltage/current acquisition unit is used for acquiring voltage and current signals of the battery pack; the temperature acquisition unit is used for acquiring the temperature of the battery pack; and the electric quantity metering unit is used for carrying out electric quantity metering management on the rechargeable battery pack.
Preferably, the charge and discharge control unit comprises a voltage-stabilizing integrated chip, an optocoupler isolation chip, a triode A and a triode B, wherein one pin of the voltage-stabilizing integrated chip is respectively connected with one end of a relay switch, one end of a resistor B and one end of a capacitor A, two pins of the voltage-stabilizing integrated chip are grounded, the three pins are respectively connected with an emitting electrode of the triode A and one end of the capacitor B, one pin of the optocoupler isolation chip is connected with the other end of the resistor B, two pins of the optocoupler isolation chip are respectively connected with the other end of the capacitor A and one end of a potentiometer, the other end of the potentiometer is respectively connected with a diode cathode and one end of the resistor A, the other end of the resistor A is respectively connected with the other end of the relay switch and a collector electrode of the triode B, a base electrode of the triode B is connected with a diode anode, the three pins of the optoco, and the base electrode of the triode B is connected with four pins of the optical coupling isolation core.
Preferably, the using method comprises the following steps:
A. according to the program setting, when the energy storage system is required to operate, the breaker switch is closed, and the battery pack is charged and discharged;
B. the battery management unit is connected with the rechargeable battery, collects voltage/current and temperature signals of the rechargeable battery in real time and feeds the signals back to the main control unit;
C. when charging and discharging are needed, the main control unit sends an instruction to the charging and discharging control unit, and the charging and discharging control unit controls the charging and discharging processing;
D. during discharging, the battery pack is inverted by the inversion module and then output, and then is connected to an external load through the contact relay and the isolation transformer;
E. and the background monitoring center tracks the charging and discharging conditions of the battery pack in real time.
Compared with the prior art, the invention has the beneficial effects that:
(1) the working principle of the invention is simple, the charging and discharging efficiency of the energy storage system is high, and the charging and discharging can be carried out in different time periods; the distributed energy storage system can also automatically compensate the capacity of the power distribution system through a control program to realize stable transformer load, improve the voltage quality of a user side, reduce the loss of the power distribution network, realize the capacity optimal configuration of the power distribution network, improve the voltage and stability of the power distribution network, and solve the problem that enough charging piles cannot be built due to insufficient power of the power network.
(2) The battery management unit adopted by the invention can automatically and accurately measure the service condition of the battery pack, protect the battery from over-charging and over-discharging, has the functions of over-current, over-voltage and temperature protection, and can reflect the working state information of the battery pack in real time to ensure the safe operation of the battery pack.
(3) The charge and discharge control unit adopted by the invention realizes the detection control of voltage by utilizing the triode and the optical coupling isolation chip, can automatically switch from a discharge state to a charge state when the battery pack is undervoltage, and can avoid overcharging at the same time, thereby comprehensively protecting the rechargeable battery pack.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a block diagram of the control scheme of the present invention;
FIG. 3 is a functional block diagram of a battery management unit according to the present invention;
fig. 4 is a circuit diagram of the charge and discharge control unit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a user side distributed energy storage system, includes the switch board, its characterized in that: the control cabinet comprises a cabinet body 1, a cabinet door 2 is hinged to the front end face of the cabinet body 1, a heat dissipation groove 4 is formed in one side of the cabinet body 1, a filter screen 5 is installed on the inner side of the heat dissipation groove 4, a commercial power input end 6 is formed in the upper end portion of one side of the cabinet body 1, a control module 7 is installed at the bottom of the inner cavity of the cabinet body 1, a plurality of electric placing plates 8 are installed in the inner cavity of the cabinet body 1 from top to bottom, and a contact relay 10, an isolation transformer 9, a PCS inverter 11 and a battery pack 12 are placed on each;
the control module 7 is provided with a main control chip 13, a battery management unit 14, a charging unit 15, a discharging unit 16 and a charging and discharging control unit 18, the input end of the contact relay 9 is connected with an external power grid, the output end of the contact relay is connected with a battery pack 12 through an isolation transformer 9 and a PCS inverter 11, the battery pack 12, the contact relay 10 and the PCS inverter 11 are connected with the main control chip 13, the battery pack 12 is connected with an external load 20 through a PCS inverter 17, the charging unit 15 and the discharging unit 16 are respectively connected with the main control chip 13, and the charging and discharging control unit 18 is respectively connected with the charging unit 15, the discharging unit 16 and the main control chip 13; the battery management unit is used for collecting and feeding back voltage, current, temperature and electric quantity signals of the battery, and the charging unit is used for controlling charging of the rechargeable battery pack; the discharge unit is used for controlling the discharge of the battery pack; the charging and discharging control unit is used for switching and controlling the charging and discharging of the battery pack.
In the invention, the battery management unit 14 comprises a microprocessor 21, a CAN transceiver circuit unit 22, a power supply module 23, a balance management module unit 24, a voltage/current acquisition unit 25, a temperature acquisition module 26 and an electric quantity metering unit 27, wherein the microprocessor 21 is respectively connected with the power supply module 23, the balance management module unit 24, the voltage/current acquisition unit 25, the temperature acquisition module 26 and the electric quantity metering unit 27, the microprocessor 21 is connected with the main control chip 13 through the CAN transceiver circuit unit 22, and the CAN transceiver circuit unit is used for transmitting voltage/current data and temperature data of the battery pack; wherein the power supply module 23 is used for supplying power to a battery management system; the voltage/current acquisition unit 25 is used for acquiring voltage and current signals of the battery pack; the temperature acquisition unit 26 is used for acquiring the temperature of the battery pack; the electricity metering unit 27 is used for conducting electricity metering management on the rechargeable battery pack. The battery management unit adopted by the invention can automatically and accurately measure the use condition of the battery pack, protect the battery from over-charging and over-discharging, has the functions of over-current, over-voltage and temperature protection, and can feed back the working state information of the battery pack in real time to ensure the safety of the battery pack.
In the invention, the charge and discharge control unit 18 comprises a voltage-stabilizing integrated chip 30, an optical coupling isolation chip 31, a triode A1d and a triode B2d, wherein one pin of the voltage-stabilizing integrated chip 30 is respectively connected with one end of a relay switch 32, one end of a resistor B2a and one end of a capacitor A1c, the two pins are grounded, the three pins are respectively connected with an emitter of the triode A1d and one end of a capacitor B2c, one pin of the optical coupling isolation chip 31 is connected with the other end of the resistor B2a, the two pins are respectively connected with the other end of the capacitor A1c and one end of a potentiometer 33, the other end of the potentiometer 33 is respectively connected with a cathode of a diode 34 and one end of a resistor A1a, the other end of the resistor A1a is respectively connected with the other end of the relay switch 32 and a collector of the triode B2d, a base of the triode B2d is connected with an anode of the diode 34, the three pins of, an emitting electrode of the triode A1d is respectively connected with the other end of the capacitor B2c and the three pins of the voltage-stabilizing integrated chip 30, and a base electrode of the triode B2d is connected with the four pins of the optocoupler isolation chip 31. The charge-discharge control unit realizes voltage detection control by using the triode and the optocoupler isolation chip, can automatically switch from a discharge state to a charge state when the battery pack is under-voltage, and can avoid overcharge at the same time, thereby comprehensively protecting the rechargeable battery pack.
The working principle is as follows: the using method of the invention comprises the following steps:
A. according to the program setting, when the energy storage system is required to operate, the breaker switch is closed, and the battery pack is charged and discharged;
B. the battery management unit is connected with the rechargeable battery, collects voltage/current and temperature signals of the rechargeable battery in real time and feeds the signals back to the main control unit;
C. when charging and discharging are needed, the main control unit sends an instruction to the charging and discharging control unit, and the charging and discharging control unit controls the charging and discharging processing;
D. during discharging, the battery pack is inverted by the inversion module and then output, and then is connected to an external load through the contact relay and the isolation transformer;
E. and the background monitoring center tracks the charging and discharging conditions of the battery pack in real time.
In conclusion, the working principle of the invention is simple, the charging and discharging efficiency of the energy storage system is high, and the charging and discharging can be carried out in different time periods; the distributed energy storage system can also automatically compensate the capacity of the power distribution system through a control program to realize stable transformer load, improve the voltage quality of a user side, reduce the loss of the power distribution network, realize the capacity optimal configuration of the power distribution network, improve the voltage and stability of the power distribution network, and solve the problem that enough charging piles cannot be built due to insufficient power of the power distribution network.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a user side distributed energy storage system, includes the switch board, its characterized in that: the control cabinet comprises a cabinet body (1), a cabinet door (2) is hinged to the front end face of the cabinet body (1), a heat dissipation groove (4) is formed in one side of the cabinet body (1), a filter screen (5) is installed on the inner side of the heat dissipation groove (4), a mains supply input end (6) is formed in the upper end portion of one side of the cabinet body (1), a control module (7) is installed at the bottom of an inner cavity of the cabinet body (1), a plurality of electric placing plates (8) are installed in the inner cavity of the cabinet body (1) from top to bottom, and a contact relay (10), an isolation transformer (9), a PCS inverter (11) and a battery pack (12) are;
the control module (7) is provided with a main control chip (13), a battery management unit (14), a charging unit (15), a discharging unit (16) and a charging and discharging control unit (18), the input end of the contact relay (9) is connected with an external power grid, the output end of the contact relay (9) is connected with a battery pack (12) through an isolation transformer (9) and a PCS inverter (11), the battery pack (12), the contact relay (10) and the PCS inverter (11) are connected with the main control chip (13), the battery pack (12) is connected with an external load (20) through a PCS inverter (17), the charging unit (15) and the discharging unit (16) are respectively connected with the main control chip (13), and the charging and discharging control unit (18) is respectively connected with the charging unit (15), the discharging unit (16); the battery management unit is used for collecting and feeding back voltage, current, temperature and electric quantity signals of the battery, and the charging unit is used for controlling charging of the rechargeable battery pack; the discharge unit is used for controlling the discharge of the battery pack; the charging and discharging control unit is used for switching and controlling the charging and discharging of the battery pack.
2. The user-side distributed energy storage system according to claim 1, wherein: the battery management unit (14) comprises a microprocessor (21), a CAN transceiving circuit unit (22), a power supply module (23), a balance management module unit (24), a voltage/current acquisition unit (25), a temperature acquisition module (26) and an electric quantity metering unit (27), wherein the microprocessor (21) is respectively connected with the power supply module (23), the balance management module unit (24), the voltage/current acquisition unit (25), the temperature acquisition module (26) and the electric quantity metering unit (27), the microprocessor (21) is connected with the main control chip (13) through the CAN transceiving circuit unit (22), and the CAN transceiving circuit unit is used for transmitting voltage/current data and temperature data of the battery pack; wherein the power supply module (23) is used for supplying power to a battery management system; the voltage/current acquisition unit (25) is used for acquiring voltage and current signals of the battery pack; the temperature acquisition unit (26) is used for acquiring the temperature of the battery pack; the electric quantity metering unit (27) is used for carrying out electric quantity metering management on the rechargeable battery pack.
3. The user-side distributed energy storage system according to claim 1, wherein: the charging and discharging control unit (18) comprises a voltage-stabilizing integrated chip (30), an optical coupling isolation chip (31), a triode A (1d) and a triode B (2d), wherein one pin of the voltage-stabilizing integrated chip (30) is respectively connected with one end of a relay switch (32), one end of a resistor B (2a) and one end of a capacitor A (1c), two pins of the voltage-stabilizing integrated chip are grounded, the three pins of the voltage-stabilizing integrated chip are respectively connected with an emitting electrode of the triode A (1d) and one end of the capacitor B (2c), one pin of the optical coupling isolation chip (31) is connected with the other end of the resistor B (2a), two pins of the optical coupling isolation chip are respectively connected with the other end of the capacitor A (1c) and one end of a potentiometer (33), the other end of the potentiometer (33) is respectively connected with a negative electrode of a diode (34) and one end of the resistor A (1a), diode (34) anodal is connected to triode B (2d) base, relay (35) one end, electric capacity B (2c) one end are connected respectively to opto-coupler isolation chip (31) tripod, triode A (1d) collecting electrode is connected to relay (35) other end, electric capacity B (2c) other end and steady voltage NULL (30) tripod are connected respectively to triode A (1d) projecting pole, four feet of opto-coupler isolation chip (31) are connected to triode B (2d) base.
4. The use method for realizing the user-side distributed energy storage system of claim 1 is characterized in that: the using method comprises the following steps:
A. according to the program setting, when the energy storage system is required to operate, the breaker switch is closed, and the battery pack is charged and discharged;
B. the battery management unit is connected with the rechargeable battery, collects voltage/current and temperature signals of the rechargeable battery in real time and feeds the signals back to the main control unit;
C. when charging and discharging are needed, the main control unit sends an instruction to the charging and discharging control unit, and the charging and discharging control unit controls the charging and discharging processing;
D. during discharging, the battery pack is inverted by the inversion module and then output, and then is connected to an external load through the contact relay and the isolation transformer;
E. and the background monitoring center tracks the charging and discharging conditions of the battery pack in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010099279.9A CN111193281A (en) | 2020-02-18 | 2020-02-18 | User side distributed energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010099279.9A CN111193281A (en) | 2020-02-18 | 2020-02-18 | User side distributed energy storage system |
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| CN111193281A true CN111193281A (en) | 2020-05-22 |
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| CN202010099279.9A Pending CN111193281A (en) | 2020-02-18 | 2020-02-18 | User side distributed energy storage system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201726205U (en) * | 2010-06-09 | 2011-01-26 | 王新保 | AC energy storage cabinet and energy storage power station system |
| CN204794897U (en) * | 2015-07-08 | 2015-11-18 | 湖北天地春现代农业发展有限公司 | Solar photovoltaic intelligence control system that generates electricity |
| CN105262157A (en) * | 2015-09-25 | 2016-01-20 | 江苏峰谷源储能技术研究院有限公司 | Container energy storage control system |
| CN205029416U (en) * | 2015-10-23 | 2016-02-10 | 深圳职业技术学院 | Little capacity distribution formula energy memory and energy storage cabinet |
| CN107968455A (en) * | 2017-12-04 | 2018-04-27 | 郑州天舜电子技术有限公司 | A kind of storage battery charging-discharging intelligent control circuit |
-
2020
- 2020-02-18 CN CN202010099279.9A patent/CN111193281A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201726205U (en) * | 2010-06-09 | 2011-01-26 | 王新保 | AC energy storage cabinet and energy storage power station system |
| CN204794897U (en) * | 2015-07-08 | 2015-11-18 | 湖北天地春现代农业发展有限公司 | Solar photovoltaic intelligence control system that generates electricity |
| CN105262157A (en) * | 2015-09-25 | 2016-01-20 | 江苏峰谷源储能技术研究院有限公司 | Container energy storage control system |
| CN205029416U (en) * | 2015-10-23 | 2016-02-10 | 深圳职业技术学院 | Little capacity distribution formula energy memory and energy storage cabinet |
| CN107968455A (en) * | 2017-12-04 | 2018-04-27 | 郑州天舜电子技术有限公司 | A kind of storage battery charging-discharging intelligent control circuit |
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Effective date of registration: 20230621 Address after: Room 208, Building A1-A3, Jinrui Lugu Science Park, 28 Lutian Road, Yuelu District, Changsha City, Hunan Province, 410205 Applicant after: Hunan Cloud Storage Recycling New Energy Technology Co.,Ltd. Address before: 410006 Lushan South Road, Changsha, Hunan Applicant before: CHANGSHA RESEARCH INSTITUTE OF MINING AND METALLURGY Co.,Ltd. |
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Application publication date: 20200522 |