Semi-physical simulation device

Abstract

The utility model discloses a semi-physical simulation device, and belongs to the technical field of energy storage system simulation. The semi-physical simulation device comprises a battery pack simulation module which comprises a voltage source unit and a resistor unit; the voltage regulation module is electrically connected with the voltage source unit; the battery management unit is electrically connected with the voltage source unit and the resistor unit respectively; and the battery cluster management unit is electrically connected with the battery management unit. Thus, through the modular design, the battery pack simulation module, the voltage regulation module, the battery management unit and the battery cluster management unit are utilized to simulate the voltage, internal resistance and management functions of the energy storage system, different working conditions can be flexibly simulated without building a complete energy storage system, the development cost and complexity of the energy storage system are remarkably reduced, and the development efficiency of the energy storage system is improved. The simulation efficiency is improved, and the development process of the energy storage system is accelerated.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of energy storage system simulation, and particularly relates to a semi-physical simulation device. BACKGROUND

[0002] In actual operation, an energy storage system needs to undertake important tasks such as stabilizing a power system, providing a backup power supply, participating in peak regulation and frequency regulation. If the energy storage system has defects in functions, it may seriously affect the safe and stable operation of the power system. Therefore, before the energy storage system is put into use, the functions of each functional module and the overall system need to be verified to ensure that each functional module realizes the expected functions.

[0003] At present, a complete energy storage system is usually built for simulation in the development stage, however, the simulation efficiency of this method is low. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a semi-physical simulation device for improving the simulation efficiency of an energy storage system.

[0005] The application provides a semi-physical simulation device, which comprises:

[0006] A battery pack simulation module, which comprises a voltage source unit and a resistance unit;

[0007] A voltage regulation module, which is electrically connected with the voltage source unit;

[0008] A battery management unit, which is electrically connected with the voltage source unit and the resistance unit respectively;

[0009] A battery cluster management unit, which is electrically connected with the battery management unit.

[0010] In some embodiments, the voltage source unit has a first port and a second port, and the first port and the second port are both electrically connected with the battery management unit;

[0011] The voltage source unit comprises a plurality of battery monomer simulation channels, and the plurality of battery monomer simulation channels are connected in series between the first port and the second port;

[0012] Two adjacent battery monomer simulation channels have a node, and the node is electrically connected with the battery management unit through a first sampling line.

[0013] In some embodiments, the resistance unit comprises a plurality of resistors, and the resistors are connected with the battery management unit through a second sampling line.

[0014] In some embodiments, the resistors are programmed resistors.

[0015] In some embodiments, the voltage regulation module comprises:

[0016] a voltage collection unit, electrically connected with the voltage source unit;

[0017] a bidirectional DC power supply, communicatively connected with the voltage collection unit.

[0018] In some embodiments, the bidirectional DC power supply is communicatively connected with the voltage collection unit through a controller area network.

[0019] In some embodiments, the bidirectional DC power supply has a third port and a fourth port;

[0020] the semi-physical simulation device further comprises a contactor, the third port is electrically connected with the contactor, and the fourth port is used for accessing a power grid.

[0021] In some embodiments, further comprising:

[0022] a power regulation module, a DC side of the power regulation module is electrically connected with the power source, and an AC side is used for accessing the power grid;

[0023] a battery system control module, communicatively connected with the battery cluster management unit;

[0024] a local controller, communicatively connected with the power regulation module and the battery system control module;

[0025] a test control module, communicatively connected with the local controller and the battery pack simulation module.

[0026] In some embodiments, the contactor has a fifth port, a sixth port and a seventh port, the fifth port is electrically connected with the third port, the sixth port is electrically connected with the battery cluster management unit, and the seventh port is electrically connected with the DC side of the power regulation module.

[0027] In some embodiments, the battery cluster management unit is communicatively connected with the battery management unit through a daisy chain.

[0028] Beneficial effects: Compared with the prior art, the semi-physical simulation device provided by the embodiment of the application comprises: a battery pack simulation module, including a voltage source unit and a resistance unit; a voltage regulation module electrically connected with the voltage source unit; a battery management unit electrically connected with the voltage source unit and the resistance unit respectively; and a battery cluster management unit electrically connected with the battery management unit. In this way, by means of the modular design, the battery pack simulation module, the voltage regulation module, the battery management unit and the battery cluster management unit, the voltage, internal resistance and management function of the energy storage system are simulated, different working conditions can be flexibly simulated without building a complete energy storage system, the development cost and complexity of the energy storage system are significantly reduced, the simulation efficiency is improved, and the development process of the energy storage system is accelerated. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 A structural schematic diagram of the semi-physical simulation device provided by the embodiment of the application;

[0031] Figure 2 Another structural schematic diagram of the semi-physical simulation device provided by the embodiment of the application;

[0032] Figure 3 A structural schematic diagram of the battery pack simulation module in the semi-physical simulation device provided by the embodiment of the application;

[0033] Figure 4 Another structural schematic diagram of the semi-physical simulation device provided by the embodiment of the application.

[0034] The drawings show: 100-battery pack simulation module; 110-voltage source unit; 111-first port; 112-second port; 113-battery cell simulation channel; 114-node; 115-first sampling line; 120-resistance unit; 121-resistance; 122-second sampling line; 200-voltage regulation module; 210-voltage acquisition unit; 220-bidirectional direct current power supply; 221-third port; 222-fourth port; 300-battery management unit; 400-battery cluster management unit; 500-contactor; 510-fifth port; 520-sixth port; 530-seventh port; 600-power regulation module; 700-battery system control module; 800-local controller; 900-test control module. DETAILED DESCRIPTION

[0035] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0036] It should be noted that the terms "first", "second" and the like in the description of the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In the description of the present application, "a plurality of" means two or more, unless otherwise specified. The association relationship of the associated objects is described, and it means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the front and rear associated objects. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0037] Those skilled in the art can understand that the drawings are only schematic diagrams of example embodiments, and can not be to scale. The modules or flows in the drawings are not necessarily essential for implementing the present application, and therefore cannot be used to limit the scope of protection of the present application.

[0038] The applicant finds that the construction process of the energy storage system is complex, and the overall debugging of the energy storage system needs to be performed after debugging each functional module. The existing simulation scheme is to develop a complete energy storage system in the development stage, and the platform construction process is complex (debugging of the sub-modules is performed first and then overall debugging is performed), and resource coordination is difficult, resulting in long hardware resources and development cycle, which ultimately affects the product development efficiency. In addition, since complete electrochemical cells need to be used in the testing process, the testing resource cost is increased, and part of the test conditions cannot be effectively simulated on the real system platform, resulting in reduced test efficiency and coverage. Therefore, the current verification using the simulation model cannot verify the functional compatibility of each module and the reliability of the system platform.

[0039] Therefore, the embodiments of the present application provide a semi-physical simulation device to at least partially solve the above technical problems.

[0040] Please refer to Figure 1 ,Figure 2 and Figure 3 , Figure 1 Fig. 1 shows a structural schematic diagram of a semi-physical simulation device provided by an embodiment of the present application; Figure 2 Fig. 2 shows another structural schematic diagram of a semi-physical simulation device provided by an embodiment of the present application; Figure 3 Fig. 3 shows a structural schematic diagram of a battery pack simulation module in a semi-physical simulation device provided by an embodiment of the present application. The embodiment of the present application provides a semi-physical simulation device, which comprises a battery pack simulation module 100, a voltage regulation module 200, a battery management unit 300 and a battery cluster management unit 400; wherein the battery pack simulation module 100 comprises a voltage source unit 110 and a resistance unit 120, the voltage regulation module 200 is electrically connected with the voltage source unit 110, the battery management unit 300 is electrically connected with the voltage source unit 110 and the resistance unit 120 respectively, and the battery cluster management unit 400 is electrically connected with the battery management unit 300. Specifically, the embodiment of the present application simulates the characteristics of real battery monomers through the battery pack simulation module 100, especially simulates the voltage signal change of the battery monomers through the voltage source unit 110 and simulates the temperature signal change of the battery monomers through the resistance unit 120. The voltage signal of the voltage source unit 110 and the temperature signal of the resistance unit 120 are collected through the voltage regulation module 200, and the voltage signal and the temperature signal are flexibly adjusted to simulate the battery monomers under different working conditions, so as to meet the diversified testing requirements. In addition, the battery management unit 300 (BMU) is electrically connected with the voltage source unit 110 and the resistance unit 120 respectively to simulate the function of the battery management system; the battery cluster management unit 400 (CMU) is electrically connected with the battery management unit 300 to simulate the cooperative work of the battery cluster, which avoids the need to build a complex actual energy storage system and shortens the development cycle. It should be noted that the voltage source unit 110 in the present application can be a high-precision voltage source unit, and the resistance unit 120 can be a high-precision resistance unit, so as to effectively realize the simulation function.

[0041] Therefore, through the modular design, the battery pack simulation module 100, the voltage regulation module 200, the battery management unit 300 and the battery cluster management unit 400 are used to simulate the voltage, internal resistance and management function of the energy storage system, so that different working conditions can be flexibly simulated without building a complete energy storage system, which significantly reduces the development cost and complexity of the energy storage system, improves the simulation efficiency, and accelerates the development process of the energy storage system.

[0042] In some embodiments, the voltage source unit 110 has a first port 111 and a second port 112, both of which are electrically connected to the battery management unit 300; the voltage source unit 110 includes a plurality of battery cell analog channels 113, which are connected in series between the first port 111 and the second port 112; two adjacent battery cell analog channels 113 have a node 114, which is electrically connected to the battery management unit 300 through a first sampling line 115. Specifically, the series connection of the plurality of battery cell analog channels 113 can accurately simulate a plurality of battery cells, achieve high-precision simulation of the voltage of the battery pack, and provide the battery management unit 300 with a voltage sampling signal and a power supply. By arbitrarily changing the voltage of any battery cell analog channel 113, the change of the voltage signal sampled by the battery management unit 300 can be realized, and the test accuracy can be improved. In addition, the series connection design of the plurality of battery cell analog channels 113 can flexibly expand or reduce the number of channels as needed, adapt to the simulation needs of battery packs of different scales, and enhance the universality of the semi-physical simulation device. Especially, the connection of the node 114 between the two adjacent battery cell analog channels 113 to the battery management unit 300 through the first sampling line 115 can monitor the voltage state of each battery cell analog channel 113 in real time, provide accurate data support for the battery management unit 300, and optimize the management strategy. Moreover, the first port 111 and the second port 112 are both connected to the battery management unit 300, which, in combination with the sampling design of the node 114, reduces the need for complex wiring, reduces the difficulty and cost of integrating the semi-physical simulation system, and improves the development efficiency and system reliability.

[0043] In some embodiments, the resistance unit 120 includes a plurality of resistors 121, which are connected to the battery management unit 300 through a second sampling line 122. Specifically, the plurality of resistors 121 can accurately simulate the internal resistance characteristics of the battery pack, and can flexibly adjust the resistance value according to the simulation needs, adapt to the simulation needs of different battery cell types and working conditions, ensure that the simulation results are closer to the real battery cells, and improve the test accuracy. Moreover, the connection of the resistors 121 to the battery management unit 300 through the second sampling line 122 can monitor the state of the resistors 121 in real time, provide internal resistance data support for the battery management unit 300, and optimize the battery management strategy.

[0044] In some embodiments, the resistors 121 are programmable resistors. Specifically, the programmable resistors can dynamically and quickly adjust the resistance value of the resistors 121 through program control according to the simulation needs, accurately simulate the internal resistance changes of the battery cells under different working conditions, adapt to the simulation needs of various battery types, temperature conditions and aging states, improve the authenticity and accuracy of the simulation, and enhance the universality and flexibility of the semi-physical simulation device.

[0045] In some embodiments, the voltage regulation module 200 comprises a voltage acquisition unit 210 and a bidirectional DC power supply 220. The voltage acquisition unit 210 is electrically connected with the voltage source unit 110, and the bidirectional DC power supply 220 is communicatively connected with the voltage acquisition unit 210. Specifically, the voltage acquisition unit 210 is responsible for acquiring the total voltage of the battery in each cluster and controlling the output voltage of the bidirectional DC power supply 220 to the DC cable on the power regulation module 600 side. In this way, the voltage acquisition unit 210 is electrically connected with the voltage source unit 110, which can acquire the voltage data of the voltage source unit 110 in real time, and the bidirectional DC power supply 220 supports the regulation function of bidirectional energy flow, which can simulate the discharge state of the battery monomer and also can simulate the charging state of the battery monomer, realizes high-precision voltage output control, fully covers the simulation needs of the battery monomer charging and discharging process, and meets the needs of different simulation conditions. In addition, the voltage acquisition unit 210 is communicatively connected with the bidirectional DC power supply 220, which can real-time feedback voltage state and dynamically adjust the output, to ensure the stability and accuracy of the simulation process. It should be noted that the voltage acquisition unit 210 in the present application can be a high-precision voltage acquisition unit, and the bidirectional DC power supply 220 can be a high-power bidirectional DC power supply, to effectively realize the simulation function.

[0046] In some embodiments, the bidirectional DC power supply 220 is communicatively connected with the voltage acquisition unit 210 through a controller area network (CAN). Specifically, the CAN communication has the characteristics of strong anti-interference ability and high reliability, and supports high-speed data transmission, which can ensure the stability of data transmission between the bidirectional DC power supply 220 and the voltage acquisition unit 210, realize real-time data exchange between the voltage acquisition unit 210 and the bidirectional DC power supply 220, ensure the rapid response and accurate control of voltage regulation, and reduce the influence of communication failure on the simulation process. In addition, the CAN communication adopts a bus structure, which can connect multiple devices with only a small number of cables, significantly simplifying the wiring and reducing the hardware complexity and integration cost of the semi-physical simulation device.

[0047] In some embodiments, the bidirectional DC power supply 220 has a third port 221 and a fourth port 222; the semi-physical simulation device further comprises a contactor 500, the third port 221 is electrically connected with the contactor 500, and the fourth port 222 is used for accessing the power grid. Specifically, the fourth port 222 is used for accessing the power grid, so that the bidirectional DC power supply 220 can directly obtain electric energy from the power grid or feed back electric energy to the power grid, realizing the bidirectional flow of energy and expanding the application scenarios of the simulation device. The contactor 500 is electrically connected with the third port 221 and can realize the on-off control of the circuit, ensuring that the system safely and reliably switches the working state during the simulation process and avoiding unexpected situations. In addition, the contactor 500 as a circuit protection device can quickly cut off the circuit in abnormal situations, protecting the bidirectional DC power supply 220 and other equipment and improving the safety and reliability of the system. Through the access of the power grid and the control of the contactor 500, the bidirectional DC power supply 220 can efficiently utilize the grid electric energy during the charging and discharging process, reduce energy loss and test cost. That is, the present application combines the power grid access and the contactor 500, can more realistically simulate the grid-connected and off-grid states of the energy storage system in actual operation, and improve the accuracy and practicality of the simulation results.

[0048] Please refer to Figure 4 , Figure 4Another structure schematic diagram of the semi-physical simulation device provided by the embodiments of the present application is shown. In some embodiments, the semi-physical simulation device further comprises a power conditioning module 600, a battery system control module 700, a local controller 800 and a test control module 900; the direct current side of the power conditioning module 600 is electrically connected with the bidirectional direct current power supply 220, the alternating current side is used for accessing the power grid, the battery system control module 700 is in communication connection with the battery cluster management unit 400, the local controller 800 is in communication connection with the power conditioning module 600 and the battery system control module 700, and the test control module 900 is in communication connection with the local controller 800 and the battery pack simulation module 100. Specifically, the power conditioning module 600 (PCS) is responsible for converting direct current into alternating current (inverter function) or converting alternating current into direct current (rectifier function) to realize effective access of energy. The battery system control module 700 (BS) is used for collecting system information such as battery monomer, temperature control and fire control, and controlling the battery monomer and the temperature control system. The local controller 800 (LC) is a local centralized management device used for lower layer equipment monitoring (PCS, BMS and air conditioner, etc.), realizing local centralized control and data interaction with the upper layer EMS controller. The test control module 900 (PC) communicates with the local controller 800 to realize hardware unit and software strategy testing of the energy storage system, and controls the voltage source unit 110 and the resistance unit 120 to realize simulation of monomer voltage regulation and temperature regulation in each cluster.

[0049] In this way, the direct current side of the power conditioning module 600 is electrically connected with the bidirectional direct current power supply 220, and the alternating current side accesses the power grid, so that efficient conversion and regulation of direct current and alternating current energy can be realized, energy flow can be optimized, and the overall efficiency of the system can be improved. The battery system control module 700 is in communication connection with the battery cluster management unit 400, so that fine management and control of the battery cluster can be realized, and safe and stable operation of the battery system can be ensured. The local controller 800 is in communication connection with the power conditioning module 600 and the battery system control module 700, so as to coordinate power conditioning and battery system management and realize efficient collaborative operation of the system as a core control unit. The test control module 900 is in communication connection with the local controller 800 and the battery pack simulation module 100, so that simulation parameters can be flexibly configured according to test requirements, and simulation of multiple test scenes and working conditions can be supported. In this way, communication connection between the modules realizes real-time transmission and feedback of data, which facilitates monitoring of the state of the semi-physical simulation device and timely adjustment of the control strategy, and improves the accuracy and reliability of the simulation.

[0050] In some embodiments, the contactor 500 has a fifth port 510, a sixth port 520 and a seventh port 530, the fifth port 510 is electrically connected with the third port 221, the sixth port 520 is electrically connected with the battery cluster management unit 400, and the seventh port 530 is electrically connected with the direct current side of the power conditioning module 600. Specifically, through the connection of the fifth port 510 and the seventh port 530, the contactor 500 can efficiently transmit electric energy between the bidirectional direct current power supply 220 and the power conditioning module 600, optimize energy flow, and improve the overall efficiency of the system. The sixth port 520 is electrically connected with the battery cluster management unit 400, so that the contactor 500 can directly participate in the management and control of the battery cluster, ensuring the safe and stable operation of the battery cluster. In this way, the multifunctional connection of the contactor 500 is realized, and the integration and flexibility of the semi-physical simulation device are enhanced.

[0051] In some embodiments, the battery cluster management unit 400 is connected with the battery management unit 300 through daisy chain communication. Specifically, the daisy chain communication adopts a series connection mode, and only one communication line is needed to connect multiple battery management units 300 and battery cluster management units 400, which significantly simplifies the system wiring, reduces the hardware complexity and integration cost. In addition, the daisy chain communication structure is simple, reduces the number of connection points and interfaces, reduces the probability of communication failure, and improves the reliability and stability of the system. Moreover, the daisy chain communication supports flexible expansion, which is convenient for subsequent addition of more battery management units 300 or battery cluster management units 400, and adapts to different scales of battery cluster simulation needs.

[0052] In summary, the semi-physical simulation system controls the voltage source unit 110 and the resistance unit 120 to adjust the voltage and temperature of the battery monomer according to the test needs, and feeds back the voltage to the bidirectional direct current power supply 220 to realize the total pressure output of the battery cluster. The battery cluster management unit 400(CMU) realizes the information collection of the battery monomer through the daisy chain with the battery management unit 300(BMU), and controls the connection of the bidirectional direct current power supply 220 and the power conditioning module 600(PCS) direct current side. The battery system control module 700(BSC) realizes the processing of the data uploaded by the battery cluster management unit 400, and executes the instruction information issued by the local controller 800(LC). The power conditioning module 600 responds to the power scheduling information issued by the local controller 800, realizes the charging and discharging function.

[0053] Therefore, the application can not only simulate and lock faults of the related software and hardware of the on-site energy storage system by injecting faults into the semi-physical simulation device, but also verify the solution in a closed loop, while saving manpower and platform required for system verification. In addition, the semi-physical simulation device can quickly perform functional verification and early exploration of potential failure of the energy storage system to solve many software solutions and risks that need to be verified for the first time in the energy storage system, thereby shortening the development time, reducing the development cost, reducing the product failure rate, and reducing the fixed asset investment and electricity cost for testing by using the semi-physical simulation device to verify the software function.

[0054] The semi-physical simulation device provided by the embodiments of the application is described in detail above, and the principle and implementation manner of the application are described by applying specific examples. The above embodiment description is only used to help understand the technical solutions and core ideas of the application; those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A semi-physical simulation apparatus, characterized by comprising: The application relates to a semi-physical simulation device for testing a battery system. The semi-physical simulation device comprises a battery pack simulation module, a voltage regulation module, a battery management unit and a battery cluster management unit. The battery pack simulation module comprises a voltage source unit and a resistance unit. The voltage source unit has a first port and a second port, both of which are electrically connected to the battery management unit. The voltage source unit comprises a plurality of battery cell simulation channels, which are connected in series between the first port and the second port.

2. The semi-physical simulation device of claim 1, wherein, Each two adjacent battery cell simulation channels have a node, which is electrically connected to the battery management unit through a first sampling line. The resistance unit comprises a plurality of resistors, which are connected to the battery management unit through a second sampling line. The resistors are programmable resistors.

3. The semi-physical simulation apparatus according to claim 1, characterized in that, The voltage regulation module comprises a voltage collection unit and a bidirectional DC power supply.

4. The semi-physical simulation device of claim 3, wherein, The voltage collection unit is electrically connected to the voltage source unit.

5. The semi-physical simulation apparatus according to claim 2, wherein The bidirectional DC power supply is communicatively connected to the voltage collection unit through a controller area network. The bidirectional DC power supply has a third port and a fourth port. The semi-physical simulation device further comprises a contactor, the third port is electrically connected to the contactor, and the fourth port is used for connecting to a power grid.

6. The semi-physical simulation device of claim 5, wherein, The semi-physical simulation device further comprises a power regulation module, a battery system control module, a local controller and a test control module.

7. The semi-physical simulation apparatus according to claim 5, characterized in that, The power regulation module has a DC side and an AC side, the DC side is electrically connected to the bidirectional DC power supply, and the AC side is used for connecting to the power grid. The battery system control module is communicatively connected to the battery cluster management unit.

8. The semi-physical simulation device of claim 7, wherein, The local controller is communicatively connected to the power regulation module and the battery system control module. The test control module is communicatively connected to the local controller and the battery pack simulation module. The contactor has a fifth port, a sixth port and a seventh port, the fifth port is electrically connected to the third port, the sixth port is electrically connected to the battery cluster management unit, and the seventh port is electrically connected to the DC side of the power regulation module. The battery cluster management unit is communicatively connected to the battery management unit through a daisy chain. The semi-physical simulation device has the advantages that the battery system can be tested in a semi-physical simulation mode, the battery system can be tested in a real-time mode, and the battery system can be tested in a real-time simulation mode.

9. The semi-physical simulation device of claim 8, wherein, ​ 10. The semi-physical simulation apparatus of claim 1, wherein, ​

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