Programmable battery simulation equipment

Abstract

The utility model discloses a programmable battery simulation device, which belongs to the technical field of battery simulation devices and comprises a programmable battery simulation device which comprises a switching power supply, a plurality of groups of battery simulation modules and a communication bus. An internal circuit of the battery simulation module is provided with an MCU unit, and the MCU unit is externally connected with an RS communication bus; the battery simulation module further comprises a flyback switching power supply unit, a reference voltage unit A, a voltage output unit and a voltage and current sampling unit module, the flyback switching power supply unit is electrically connected with the MCU, the reference voltage unit A and the voltage output unit, and one side of the MCU is electrically connected with the voltage output module; according to the utility model, a real battery is replaced by the internal simulation battery unit, potential safety hazards possibly existing in the real battery are avoided, the system can be built in any environment, the voltage output of a real battery cell is simulated, the charging and discharging processes of the battery are simulated, and a basis is provided for the building of a BMS test system.

Description

Technical Field

[0001] The utility model relates to the technical field of battery simulation equipment, in particular to a programmable battery simulation equipment. Background Art

[0002] With the rapid growth of energy demand and the rise of renewable energy, the energy storage industry has a broad space and opportunities for development. As the key carrier in the energy storage system, how to ensure the long life and stable operation of the battery has put forward higher requirements for the BMS. It is particularly important to strengthen the testing of BMS (battery management system) and enhance the robustness of BMS. However, in actual applications, because real batteries may have fire safety hazards, it is impossible to build a real battery environment in any environment for BMS equipment testing, which brings great inconvenience to testers. In particular, after the energy storage system is delivered, the BMS equipment also loses the test environment. Therefore, we need to propose a programmable battery simulation device for building a BMS test system. Utility Model Content

[0003] The purpose of the utility model is to provide a programmable battery simulation device, in which a battery simulation module replaces a real battery cell, simulates the battery cell voltage output, and the charging and discharging functions, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides: a programmable battery simulation device, including a programmable battery simulation device, the programmable battery simulation device includes a switching power supply, multiple battery simulation modules, and a communication bus; the battery simulation module includes an MCU unit, the MCU unit is externally connected to an RS communication bus, the end of the RS communication bus is externally connected to a transfer device, and the transfer device is externally connected to a host computer; the battery simulation module includes a flyback switching power supply unit, a reference voltage unit A, a voltage output unit and a voltage and current sampling unit module, the flyback switching power supply unit is electrically connected to the MCU unit, the reference voltage unit A and the voltage output unit, one side of the MCU unit is electrically connected to the voltage output module, the differential operational amplifier circuit unit B of the voltage output module is electrically connected to the voltage and current sampling module through the voltage output unit, and the voltage and current sampling module is electrically connected to the MCU unit.

[0005] Preferably, an end conversion of the communication bus is connected with an external optical fiber, the other end of the external optical fiber is connected to a transfer device, and the transfer device is connected to a host computer via Ethernet.

[0006] Preferably, the switching power supplies are electrically connected to the battery simulation modules through RS lines, the battery simulation modules are connected to the communication bus through RS lines, and the MCU unit is movably plugged into the RS communication bus.

[0007] Preferably, the voltage output module includes a PWM signal output unit, an RC filter circuit unit, an amplification circuit unit and a differential operational amplifier circuit unit A. The voltage output module is electrically connected to the MCU through the PWM signal output unit, and the reference voltage unit A is electrically connected to the RC filter circuit unit.

[0008] Preferably, the PWM signal output unit is electrically connected to the RC filter circuit unit, the RC filter circuit unit is electrically connected to the amplifier circuit unit, and the amplifier circuit unit is electrically connected to the differential operational amplifier circuit unit A.

[0009] Preferably, the voltage and current sampling module includes a voltage sampling unit, a voltage AD sampling unit, a reference voltage B unit, a current sampling unit, a differential operational amplifier circuit and a current AD sampling unit, the voltage sampling unit is electrically connected to the voltage output unit, and the current sampling unit is connected to the voltage output unit.

[0010] Preferably, the voltage output unit is respectively connected to a discharge unit and a charging unit, the current sampling unit is respectively electrically connected to the charging unit and the discharge unit, the discharge unit is externally connected to an output voltage, and the charging unit is externally connected to an output voltage.

[0011] Preferably, the voltage sampling unit is electrically connected to a voltage AD sampling unit, and the voltage AD sampling unit is connected to an MCU unit.

[0012] Preferably, the current sampling unit is electrically connected to a differential operational amplifier circuit unit, and the differential operational amplifier circuit unit is connected to the current AD sampling unit.

[0013] Preferably, the voltage AD sampling unit and the current AD sampling unit are both connected to a reference voltage B unit, and the current AD sampling unit is electrically connected to the MCU unit.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The programmable battery simulation device of this utility model replaces the real battery with an internal simulated battery unit, avoiding the potential safety hazards of the real battery, and can be built in any environment;

[0016] 2. The programmable battery simulation device of the utility model can simulate the voltage output of a real battery cell, simulate the battery charging and discharging process, and provide a basis for the construction of a BMS test system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a connection block diagram of the programmable battery simulation device of the utility model;

[0018] Figure 2This is a block diagram of the programmable battery simulation device of the utility model;

[0019] Figure 3 This is a block diagram of the circuit composition of a single battery simulation module of the utility model;

[0020] Figure 4 The utility model is a programmable battery simulation device parameter setting recovery flow chart.

[0021] In the figure: 1. Host computer; 2. Transfer equipment; 3. Programmable battery simulation equipment; 4. Switching power supply; 5. Battery simulation module; 6. Communication bus; 7. External optical fiber; 8. Flyback switching power supply unit; 9. MCU unit; 10. Reference voltage unit A; 11. PWM signal output unit; 12. RC filter circuit unit; 13. Amplification circuit unit; 14. Differential operational amplifier circuit unit A; 15. Voltage output unit; 16. Discharging unit; 17. Charging unit; 18. Current sampling unit; 19. Differential operational amplifier circuit unit B; 20. Current AD sampling unit; 21. Voltage sampling unit; 22. Voltage AD sampling unit; 23. Reference voltage B unit. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 The utility model provides: a programmable battery simulation device, including a programmable battery simulation device 3, the programmable battery simulation device 3 includes a switching power supply 4, a plurality of battery simulation modules 5, and a communication bus 6; the battery simulation module 5 includes an MCU unit 9, the MCU unit 9 is externally connected to an RS485 communication bus 6, the end of the RS485 communication bus 6 is externally connected to a transfer device 2, and the transfer device 2 is externally connected to a host computer 1; the battery simulation module 5 includes a flyback switching power supply unit 8, a reference voltage unit A10, a voltage output unit 15 and a voltage and current sampling unit 18 module, the flyback switching power supply unit 8 is electrically connected to the MCU unit 9, the reference voltage unit A10 and the voltage output unit 15, one side of the MCU unit 9 is electrically connected to the voltage output module, the differential operational amplifier circuit unit B19 of the voltage output module is electrically connected to the voltage and current sampling module through the voltage output unit 15, and the voltage and current sampling module is electrically connected to the MCU unit 9.

[0024] It is worth noting that, through the coordinated setting of the flyback switching power supply unit 8, the MCU unit 9, the voltage output module and the voltage and current sampling module structure, the programmable battery simulation device 3 is composed of a number of battery simulation modules 5. Each battery simulation module 5 can set and collect the voltage of the battery simulation module 5 through the optical fiber interface. The circuit composition of a single battery simulation module 5 completes the programmable voltage output scheme of the battery simulation module 5. The real battery is replaced by the internal simulation battery module, avoiding the potential safety hazards of the real battery. It can be built in any environment, simulate the voltage output of the real battery cell, and simulate the battery charging and discharging process, providing a basis for the construction of the BMS test system.

[0025] Specifically, the end of the communication bus 6 is converted and plugged with an external optical fiber 7, the other end of the external optical fiber 7 is connected to the transfer device 2, and the transfer device 2 is connected to the host computer 1 via Ethernet. The switching power supply 4 is electrically connected to the battery simulation module 5 through the RS485 line, the battery simulation module 5 is connected to the communication bus 6 through the RS485 line, and the MCU unit 9 is movably plugged into the RS485 communication bus 6.

[0026] Furthermore, the host computer 1 is connected to the transfer device 2 via an Ethernet interface, and the optical fiber interface of the transfer device 2 is connected to the programmable battery simulation device 3. The programmable battery simulation device 3 is an optical fiber interface to the outside and an RS485 communication interface to the inside. The programmable battery simulation device 3 completes the mutual conversion between the optical fiber signal and the RS485 signal. The programmable battery simulation device 3 has a switching power supply 4 inside, which is used to power all battery simulation modules 5. The programmable battery simulation device 3 has several battery simulation modules 5 inside, and the battery simulation module 5 simulates the real battery cell.

[0027] The voltage output module includes a PWM signal output unit 11, an RC filter circuit unit 12, an amplifier circuit unit 13 and a differential operational amplifier circuit unit A14. The voltage output module is electrically connected to the MCU through the PWM signal output unit 11, and the reference voltage unit A10 is electrically connected to the RC filter circuit unit 12. The PWM signal output unit 11 is electrically connected to the RC filter circuit unit 12, the RC filter circuit unit 12 is electrically connected to the amplifier circuit unit 13, and the amplifier circuit unit 13 is electrically connected to the differential operational amplifier circuit unit A14.

[0028] Each battery simulation module 5 is powered by a flyback switching power supply unit 8, so that the voltage output terminals of each battery simulation module 5 are independent of each other and do not interfere with each other. The flyback switching power supply unit 8 is mainly used to power the MCU unit 9, the voltage output unit 15, and the reference voltage unit A10.

[0029] The voltage and current sampling module includes a voltage sampling unit 21, a voltage AD sampling unit 22, a reference voltage B unit 23, a current sampling unit 18, a differential operational amplifier circuit and a current AD sampling unit 20. The voltage sampling unit 21 is electrically connected to the voltage output unit 15, and the current sampling unit 18 is connected to the voltage output unit 15. The voltage output unit 15 is respectively connected to the discharge unit 16 and the charging unit 17, and the current sampling unit 18 is respectively electrically connected to the charging unit 17 and the discharge unit 16. The discharge unit 16 is externally connected to the output voltage, and the charging unit 17 is externally connected to the output voltage.

[0030] In addition, there is an MCU inside the battery simulation module 5. The MCU converts the RS485 signal to an optical fiber and communicates with an external host computer to set and collect the voltage of the battery simulation module 5. At the same time, the MCU will output a PWM signal according to the voltage to be output. After the PWM signal passes through the RC filtering circuit, it passes through the amplification circuit and the differential op amp amplification circuit to output the voltage. The battery simulation module 5 is in the discharge state by default and outputs the voltage. When the external voltage is greater than the voltage of the battery simulation module 5 and reaches the charging state, the battery simulation module 5 switches to the charging state.

[0031] The voltage sampling unit 21 is electrically connected to the voltage AD sampling unit 22, and the voltage AD sampling unit 22 is connected to the MCU unit 9. The current sampling unit 18 is electrically connected to the differential operational amplifier circuit unit, and the differential operational amplifier circuit unit is connected to the current AD sampling unit 20. The voltage AD sampling unit 22 and the current AD sampling unit 20 are both connected to the reference voltage B unit 23, and the current AD sampling unit 20 is electrically connected to the MCU unit 9.

[0032] Preferably, the battery simulation module 5 has voltage sampling and current sampling inside. The voltage sampling adopts independent AD sampling, and AD uses an external reference voltage. The current sampling first passes through a differential amplifier circuit, and then adopts independent AD sampling, and AD uses an external reference voltage. The collected voltage and current signals are then collected into the MCU through the IIC interface.

[0033] The upper computer 1 sends the parameters for setting the battery simulation device to the transfer device 2, and the transfer device 2 then sends the parameters to the programmable battery simulation device 3. After receiving the parameters, the battery simulation device sets the voltage of each battery simulation module 5. After the battery simulation module 5 is set, the battery simulation module 5 feeds back the setting status to the transfer device 2, and the transfer device 2 feeds back to the upper computer 1, completing the parameter setting and recovery of the entire programmable battery simulation device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A programmable battery simulation device, characterized in that, include: A programmable battery simulation device (3), the programmable battery simulation device (3) comprising a switching power supply (4), a plurality of battery simulation modules (5), and a communication bus (6); the battery simulation module (5) comprising an MCU unit (9), the MCU unit (9) being externally connected to the communication bus (6), the end of the communication bus (6) being externally connected to a transfer device (2), and the transfer device (2) being externally connected to a host computer (1); The battery simulation module (5) also includes a flyback switching power supply unit (8), a reference voltage unit A (10), a voltage output unit (15) and a voltage and current sampling unit (18) module. The flyback switching power supply unit (8) is electrically connected to the MCU unit (9), the reference voltage unit A (10) and the voltage output unit (15). One side of the MCU unit (9) is electrically connected to the voltage output module. The differential operational amplifier circuit unit B (19) of the voltage output module is electrically connected to the voltage and current sampling module through the voltage output unit (15). The voltage and current sampling module is electrically connected to the MCU unit (9).

2. A programmable battery simulation device according to claim 1, characterized in that: The end of the communication bus (6) is converted and plugged with an external optical fiber (7), the other end of the external optical fiber (7) is connected to a transfer device (2), and the transfer device (2) is connected to a host computer (1) via Ethernet.

3. A programmable battery simulation device according to claim 1, characterized in that: The switch power supply (4) is electrically connected to a battery simulation module (5), the battery simulation module (5) is connected to a communication bus (6), and the MCU unit (9) is actively plugged into the communication bus (6).

4. A programmable battery simulation device according to claim 1, characterized in that: The voltage output module comprises a PWM signal output unit (11), an RC filter circuit unit (12), an amplifying circuit unit (13) and a differential operational amplifier circuit unit A (14); the voltage output module is electrically connected to the MCU via the PWM signal output unit (11); and the reference voltage unit A (10) is electrically connected to the RC filter circuit unit (12).

5. A programmable battery simulation device according to claim 4, characterized in that: The PWM signal output unit (11) is electrically connected to the RC filter circuit unit (12), the RC filter circuit unit (12) is electrically connected to the amplifier circuit unit (13), and the amplifier circuit unit (13) is electrically connected to the differential operational amplifier circuit unit A (14).

6. A programmable battery simulation device according to claim 1, characterized in that: The voltage and current sampling module comprises a voltage sampling unit (21), a voltage AD sampling unit (22), a reference voltage B unit (23), a current sampling unit (18), a differential operational amplifier circuit and a current AD sampling unit (20); the voltage sampling unit (21) is electrically connected to the voltage output unit (15), and the current sampling unit (18) is connected to the voltage output unit (15).

7. A programmable battery simulation device according to claim 6, characterized in that: The voltage output unit (15) is respectively connected to a discharge unit (16) and a charging unit (17); the current sampling unit (18) is respectively electrically connected to the charging unit (17) and the discharge unit (16); the discharge unit (16) is externally connected to an output voltage; and the charging unit (17) is externally connected to an output voltage.

8. A programmable battery simulation device according to claim 7, characterized in that: The voltage sampling unit (21) is electrically connected to the voltage AD sampling unit (22), and the voltage AD sampling unit (22) is connected to the MCU unit (9).

9. A programmable battery simulation device according to claim 8, characterized in that: The current sampling unit (18) is electrically connected to a differential operational amplifier circuit unit, and the differential operational amplifier circuit unit is connected to a current AD sampling unit (20).

10. A programmable battery simulation device according to claim 9, characterized in that: The voltage AD sampling unit (22) and the current AD sampling unit (20) are both connected to a reference voltage B unit (23), and the current AD sampling unit (20) is electrically connected to the MCU unit (9).

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