CN111682626A - BMS battery management system and management method suitable for energy storage cabinet - Google Patents
BMS battery management system and management method suitable for energy storage cabinet Download PDFInfo
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- CN111682626A CN111682626A CN202010686363.0A CN202010686363A CN111682626A CN 111682626 A CN111682626 A CN 111682626A CN 202010686363 A CN202010686363 A CN 202010686363A CN 111682626 A CN111682626 A CN 111682626A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (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)
- Secondary Cells (AREA)
Abstract
The invention relates to a BMS battery management system suitable for an energy storage cabinet and a management method thereof, wherein the BMS battery management system comprises a high-voltage control box, one side of the high-voltage control box is provided with a positive electrode interface and a negative electrode interface which are connected with a battery assembly, the other side of the high-voltage control box is provided with a charge-discharge positive interface and a charge-discharge negative interface which are connected with an energy storage converter, a main relay assembly is arranged in the high-voltage control box and is connected with the positive electrode interface, the high-voltage control box is provided with an aerial plug assembly, the aerial plug assembly is connected with a battery management assembly, the aerial plug assembly is also connected with a current sensor. When the highest level alarm of 'discharging single under-voltage' is reached, after the main positive relay is disconnected, the self-locking relay is disconnected after the time delay of 30 s; and when the system is powered on, performing comparison judgment and executing corresponding operation. Therefore, the problem that the energy storage system cannot be started due to 'dead halt' caused by the power consumption of the system in the standby state is solved.
Description
Technical Field
The invention relates to a battery management system and a management method thereof, in particular to a BMS battery management system suitable for an energy storage cabinet and a management method thereof.
Background
The main purpose of the BMS battery management system is to guarantee the design performance of the battery system and provide functions ranging from safety to durability and power supply performance. In terms of safety, i.e., the BMS management system can protect the battery cells or the battery pack from damage, preventing safety accidents. In terms of durability, i.e., the battery operates in a reliable and safe manner within the region to extend the useful life of the battery. In terms of power supply, i.e. the operating state of the battery, should be maintained in the situation to meet the requirements of the energy storage system.
In the case of the conventional management system, when the system is in a standby state for a long time, the voltage across the battery is continuously reduced due to its own power consumption. When the voltage is lower than the lowest discharge voltage allowed by the system, the BMS controls the main positive relay to be switched off so as to protect the battery, but the power consumption of the BMS still consumes the system power.
When the system is to be started, the strategy of the BMS judges that the pull-in relay is not allowed to prevent over-discharge because the voltage of the battery is too low, so that the PCS cannot charge the battery, and the system cannot work.
Currently, the conventional solution is to skip over the high voltage box (PDU) and BMS, and charge the battery directly across it, until the battery voltage is sufficient for the BMS to close the main positive relay, thus charging and discharging through the PCS. The method is too complicated, a charger with corresponding voltage is needed, and the temporary emergency cannot be dealt with. For the energy storage cabinet of a high-voltage system, a corresponding charger is not available in the market, and the charger is not suitable for use. And it is unsafe to charge the battery directly across the protection system.
In view of the above-mentioned drawbacks, the present designer actively makes research and innovation to create a BMS battery management system and a management method thereof suitable for an energy storage cabinet, so that the BMS battery management system and the management method thereof have industrial utilization values.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a BMS battery management system suitable for an energy storage cabinet.
The BMS battery management system suitable for the energy storage cabinet comprises a high-voltage control box, wherein one side of the high-voltage control box is provided with a positive electrode interface and a negative electrode interface which are connected with a battery assembly, and the other side of the high-voltage control box is provided with a charge-discharge positive interface and a charge-discharge negative interface which are connected with an energy storage converter, wherein: the high-voltage control box is internally provided with a main relay assembly, the main relay assembly is connected with an anode interface, the high-voltage control box is provided with an aerial plug assembly, the aerial plug assembly is connected with a battery management assembly, the aerial plug assembly is further connected with a current sensor, the current sensor is connected with a cathode interface, a direct-current power supply module is further arranged in the high-voltage control box, a negative end of the direct-current power supply module is connected with a charging and discharging negative interface, the anode end of the direct-current power supply module is connected with an automatic-locking control assembly, the automatic-locking control assembly is a self-locking relay, and a self-recovery button type starting switch is arranged on the.
Further, foretell BMS battery management system suitable for energy storage cabinet, wherein, main relay subassembly is including main positive relay, electric connection has pre-charge relay and pre-charge resistance on the main positive relay, pre-charge resistance links to each other with charge-discharge negative interface, still be provided with emergency stop switch on the module circuit that main positive relay corresponds.
Furthermore, the above BMS battery management system for the energy storage cabinet, wherein the aviation plug component is a 19-core aviation plug, and the 19-core aviation plug is at least reserved with 2 main relay component interfaces, 2 pre-charging interfaces, and 2 self-locking interfaces.
Further, the BMS battery management system for the energy storage cabinet is described above, wherein a fuse is disposed between the current sensor and the negative interface.
Further, the above BMS battery management system for an energy storage cabinet, wherein the battery management assembly is a BMS module.
The BMS battery management method suitable for the energy storage cabinet comprises the following steps:
step one, in the operation process of the system, when the highest level alarm of 'discharging monomer under-voltage' is reached, after a main positive relay is disconnected, a self-locking relay is disconnected after a delay of 30 s;
and step two, when the system is powered on, comparing and judging and executing corresponding operation.
Further, in the BMS battery management method for the energy storage cabinet, the following determination manner and operation are adopted in the second step,
1) when Vmin is less than 2V, the system fails and cannot be powered on;
2) when 2V is larger than Vmin and smaller than 2.5V and no other highest-level fault exists, after the pre-charging is successful, the main positive relay is closed, the I is made to be 0, standing is carried out, and the self-locking relay is switched off after 30 s;
3) when the Vmin is more than 2V and less than 2.5V and no other highest-level fault exists, after the pre-charging is successful, the main positive relay is closed, the I is less than 0, the charging state is entered, the main positive relay is continuously kept closed, and the self-locking relay is closed;
4) when Vmin is more than 2V and less than 2.5V, and no other highest-level fault exists, after the pre-charging is successful, the main positive relay is closed, the I is more than 0, the discharging state is entered, after the time delay is 1s, the main positive relay is disconnected, and after the time delay is 30s, the self-locking relay is disconnected.
By the scheme, the invention at least has the following advantages:
1. the problem that the energy storage system cannot be started due to 'dead halt' caused by the power consumption of the system in a standby state is solved.
2. The self-locking relay is added in a loop corresponding to the direct-current power supply module, so that the power consumption of the direct-current power supply module can be cut off in time, and the voltage of the battery is prevented from being reduced continuously.
3. During starting, the battery can be easily charged on the basis of preventing the battery from being continuously over-discharged by relying on the control strategy of the BMS module, and the operation is simple and safe.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic circuit diagram of a BMS battery management system suitable for an energy storage cabinet.
The meanings of the reference symbols in the drawings are as follows.
1 high-voltage control box 2 anode interface
3 negative electrode interface 4 battery pack
5 energy storage converter 6 charging and discharging positive interface
7 charge-discharge negative interface 8 main relay assembly
9 aviation plug assembly 10 battery management assembly
11 current sensor 12 DC power supply module
13 self-locking control assembly 14 self-restoring button type starting switch
15 pre-charging relay 16 pre-charging resistor
17 scram switch 18 fuse
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
BMS battery management system suitable for energy storage cabinet as figure 1, including high-voltage control box 1, one side of high-voltage control box 1 is provided with positive electrode interface 2 and negative electrode interface 3 that link to each other with battery pack 4, and the opposite side of high-voltage control box 1 is provided with the positive interface 6 of charge-discharge and the negative interface 7 of charge-discharge that links to each other with energy storage converter 5, and its distinctive character lies in: a main relay assembly 8 is arranged in the high-voltage control box 1 and is connected with the positive electrode interface 2. Meanwhile, in order to realize subsequent wire plugging planning of each port of the battery management assembly 10, the high-voltage control box 1 is provided with an aerial plug assembly 9, the aerial plug assembly 9 is connected with the battery management assembly 10, the aerial plug assembly 9 is further connected with a current sensor 11, and the current sensor 11 is connected with the negative electrode interface 3. And, still be provided with DC power supply module 12 in the high voltage control box 1, the negative pole end of DC power supply module 12 is connected with charge-discharge negative interface 7, and the positive pole end of DC power supply module 12 is connected with from lock control assembly 13. In view of practical implementation, the self-locking control assembly 13 adopted by the invention is a self-locking relay, and a self-recovery button type starting switch 14 is arranged on the self-locking relay.
In a preferred embodiment of the present invention, the main relay assembly 8 includes a main positive relay, a pre-charge relay 15 and a pre-charge resistor 16 are electrically connected to the main positive relay, the pre-charge resistor 16 is connected to the charge-discharge negative interface 7, and an emergency stop switch 17 is further disposed on a module loop corresponding to the main positive relay. Thus, when the emergency stop switch is pressed, the input end of the direct current power supply module loses power, the corresponding output loses power, the battery management assembly 10 loses power and cannot work, the main relay is disconnected, and the system is stopped. Specifically, the aviation plug component 9 is a 19-core aviation plug, and at least 2 main relay component 8 interfaces, 2 pre-charging interfaces and 2 self-locking interfaces are reserved on the 19-core aviation plug. Therefore, the working control requirements of the main positive relay and the self-locking relay can be matched. Meanwhile, in order to effectively protect each component when an abnormality occurs, a fuse 18 is provided between the current sensor 11 and the negative electrode interface 3.
Further, the battery management assembly 10 employed in the present invention is a BMS module. In view of the BMS modules conventionally used in the art, the conventional model is BMU51 XX. Specifically, XX are 16, 32, and 48 types, which represent the number of battery strings that can be detected. The BMS can detect the voltage, current, temperature and other parameters of the battery in real time and compare the parameters with standard data, so that the on-off of the relay is controlled, and the protection and the charging and discharging control of the system are realized. Therefore, the BMS module with the proper model can be selected according to the actual application requirement. Meanwhile, as long as the BMS module of the present invention can be adopted, it is not described herein again.
In order to better implement the present invention, there is now provided a BMS battery management method for an energy storage cabinet, including the steps of:
step one, in the running process of the system, when the highest level alarm of 'discharging monomer under-voltage' is reached, after the main positive relay is disconnected, the self-locking relay is disconnected after 30s of delay,
and step two, when the system is powered on, comparing and judging and executing corresponding operation. Specifically, the determination method and the operation method adopted by the invention are as follows:
1) and when Vmin is less than 2V, the system is in failure and cannot be powered on.
2) And when 2V is less than Vmin and less than 2.5V and no other highest-level fault exists, closing the main positive relay after the pre-charging is successful, enabling I to be 0, standing, and waiting for 30s to cut off the self-locking relay.
3) And when the Vmin is more than 2V and less than 2.5V and no other highest-level fault exists, closing the main positive relay after the pre-charging is successful, enabling I to be less than 0, entering a charging state, continuously keeping the main positive closed, and closing the self-locking relay.
4) When Vmin is more than 2V and less than 2.5V, and no other highest-level fault exists, after the pre-charging is successful, the main positive relay is closed, the I is more than 0, the discharging state is entered, after the time delay is 1s, the main positive relay is disconnected, and after the time delay is 30s, the self-locking relay is disconnected.
The working principle of the invention is as follows:
when the battery voltage reaches the highest level of 'discharging monomer undervoltage' for alarming due to self power consumption, the BMS can disconnect the main positive relay RL1 and then disconnect the self-locking relay in a delayed way for 30 s. The self-locking relay is disconnected to ensure that the direct current power supply module loses power, the self power consumption of the system is cut off, and the voltage of the battery is prevented from being detected again.
When needs start, operating personnel can press main start button when having the weather of illumination, and BMS can close latching relay, pre-charge relay, main positive relay in proper order. At this time, the battery is connected to the power supply circuit of the PSC. If the BMS detects that the inverter can charge the battery (determined by the current direction), the state of the relay is continuously maintained, and the battery is continuously charged until the battery voltage reaches the working voltage, so that the system normally operates.
In short, when a user presses the self-recovery button type start switch for a long time, the input end of the direct-current power supply module is electrified. The output end of the direct current power supply module has 12V voltage to supply power to the battery management assembly, and the battery management assembly works. The battery management assembly then closes the latching relay, at which time the start button can be released.
And when the battery management assembly detects that the battery state is normal, the pre-charging relay is closed, then the main positive relay is closed, and the pre-charging relay is disconnected. Therefore, a power supply loop from the battery to the PCS is communicated, and the system can be charged and discharged to operate.
The invention has the following advantages by the aid of the character expression and the accompanying drawings:
1. the problem that the energy storage system cannot be started due to 'dead halt' caused by the power consumption of the system in a standby state is solved.
2. The self-locking relay is added in a loop corresponding to the direct-current power supply module, so that the power consumption of the direct-current power supply module can be cut off in time, and the voltage of the battery is prevented from being reduced continuously.
3. During starting, the battery can be easily charged on the basis of preventing the battery from being continuously over-discharged by relying on the control strategy of the BMS module, and the operation is simple and safe.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. BMS battery management system suitable for energy storage cabinet, including the high-voltage control box, one side of high-voltage control box is provided with the positive interface and the negative pole interface that link to each other with battery pack, the opposite side of high-voltage control box is provided with the positive interface of charge-discharge and the negative interface of charge-discharge that links to each other with energy storage converter, its characterized in that: the high-voltage control box is internally provided with a main relay assembly, the main relay assembly is connected with an anode interface, the high-voltage control box is provided with an aerial plug assembly, the aerial plug assembly is connected with a battery management assembly, the aerial plug assembly is further connected with a current sensor, the current sensor is connected with a cathode interface, a direct-current power supply module is further arranged in the high-voltage control box, a negative end of the direct-current power supply module is connected with a charging and discharging negative interface, the anode end of the direct-current power supply module is connected with an automatic-locking control assembly, the automatic-locking control assembly is a self-locking relay, and a self-recovery button type starting switch is arranged on the.
2. The BMS battery management system for energy storage cabinets of claim 1, characterized in that: the main relay assembly comprises a main positive relay, a pre-charging relay and a pre-charging resistor are electrically connected to the main positive relay, the pre-charging resistor is connected with a charging and discharging negative interface, and an emergency stop switch is further arranged on a module loop corresponding to the main positive relay.
3. The BMS battery management system for energy storage cabinets of claim 1, characterized in that: the aviation plug assembly is a 19-core aviation plug, and at least 2 main relay assembly interfaces, 2 pre-charging interfaces and 2 self-locking interfaces are reserved on the 19-core aviation plug.
4. The BMS battery management system for energy storage cabinets of claim 1, characterized in that: and a fuse is arranged between the current sensor and the negative electrode interface.
5. The BMS battery management system for energy storage cabinets of claim 1, characterized in that: the battery management assembly is a BMS module.
6. The BMS battery management method suitable for the energy storage cabinet is characterized by comprising the following steps of:
step one, in the operation process of the system, when the highest level alarm of 'discharging monomer under-voltage' is reached, after a main positive relay is disconnected, a self-locking relay is disconnected after a delay of 30 s;
and step two, when the system is powered on, comparing and judging and executing corresponding operation.
7. The BMS battery management method for an energy storage cabinet according to claim 6, wherein: the second step adopts the following judgment method and operation,
1) when Vmin is less than 2V, the system fails and cannot be powered on;
2) when 2V is larger than Vmin and smaller than 2.5V and no other highest-level fault exists, after the pre-charging is successful, the main positive relay is closed, the I is made to be 0, standing is carried out, and the self-locking relay is switched off after 30 s;
3) when the Vmin is more than 2V and less than 2.5V and no other highest-level fault exists, after the pre-charging is successful, the main positive relay is closed, the I is less than 0, the charging state is entered, the main positive relay is continuously kept closed, and the self-locking relay is closed;
4) when Vmin is more than 2V and less than 2.5V, and no other highest-level fault exists, after the pre-charging is successful, the main positive relay is closed, the I is more than 0, the discharging state is entered, after the time delay is 1s, the main positive relay is disconnected, and after the time delay is 30s, the self-locking relay is disconnected.
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| CN202010686363.0A CN111682626A (en) | 2020-07-16 | 2020-07-16 | BMS battery management system and management method suitable for energy storage cabinet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271742A (en) * | 2020-10-14 | 2021-01-26 | 深圳悠典能源科技有限公司 | Electric mop starting energy storage system |
| CN112265471A (en) * | 2020-10-27 | 2021-01-26 | 格力博(江苏)股份有限公司 | Battery pack on-off control system |
| CN114336908A (en) * | 2021-12-31 | 2022-04-12 | 杭州协能科技股份有限公司 | Control method for starting energy storage converter |
| CN116047149A (en) * | 2023-03-28 | 2023-05-02 | 石家庄杰泰特动力能源有限公司 | Fuel cell controller voltage detection device |
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| CN212258505U (en) * | 2020-07-16 | 2020-12-29 | 苏州阳丰科技有限公司 | BMS battery management equipment suitable for energy storage cabinet |
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| CN107591829A (en) * | 2017-09-25 | 2018-01-16 | 中天储能科技有限公司 | A kind of large-scale energy storage high direct voltage control system and its control method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112271742A (en) * | 2020-10-14 | 2021-01-26 | 深圳悠典能源科技有限公司 | Electric mop starting energy storage system |
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| CN114336908A (en) * | 2021-12-31 | 2022-04-12 | 杭州协能科技股份有限公司 | Control method for starting energy storage converter |
| CN116047149A (en) * | 2023-03-28 | 2023-05-02 | 石家庄杰泰特动力能源有限公司 | Fuel cell controller voltage detection device |
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