Battery simulation device

Abstract

The utility model discloses a battery simulation device, which comprises a reference power supply module, an MCU (Microprogrammed Control Unit) master control module, an output voltage module and a charging module, the reference power supply module is connected with the MCU main control module and the output voltage module, the MCU main control module is connected with the output voltage module, the output voltage module is connected with the charging module, and the charging module is connected with an external power supply; the reference power module is used for providing working power and reference voltage; the MCU master control module is used for controlling and adjusting analog voltage output by the battery simulation device; the output voltage module is used for outputting analog voltage; the charging module is used for simulating a battery charging state. Through the reference power supply module, the MCU master control module and the output voltage module, different voltages can be output, that is, the battery simulation device can output different analog voltages to simulate the discharge function of a real battery; and the charging module is connected with an external power supply, so that the charging function of a real battery is simulated, and a foundation stone is provided for the establishment of a BMS test system.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage battery testing, and particularly relates to a battery simulation device. Background Art

[0002] With the rapid growth of energy demand and the rise of renewable energy, it provides broad space and opportunities for the development of the energy storage industry. As a key carrier in the energy storage system, how to ensure the long-life stable operation of the battery poses higher requirements for the battery management system (BMS). Strengthening the testing of BMS and enhancing its robustness are particularly important.

[0003] However, in practical applications, using real batteries may pose potential fire safety hazards, and it is impossible to build real batteries for BMS device testing in any environment. It is only possible to test the BMS at the energy storage system site. For each type of BMS system, a set of matching energy storage systems is required, which brings great inconvenience to testers. Especially after the delivery of the energy storage system, the BMS device also loses its testing environment. Therefore, designing a battery simulation device to replace real battery cells will have very important practical significance. Summary of the Utility Model

[0004] In order to overcome the above technical defects, the utility model provides a battery simulation device, which can simulate the voltage output and charge and discharge functions of a real battery.

[0005] To solve the above problems, the utility model is implemented according to the following technical solutions:

[0006] A battery simulation device, comprising:

[0007] A reference power supply module, an MCU main control module, an output voltage module and a charging module;

[0008] The reference power supply module is connected to the MCU main control module and the output voltage module, the MCU main control module is connected to the output voltage module, the output voltage module is connected to the charging module, and the charging module is connected to an external power supply;

[0009] The reference power supply module is used to provide a working power supply and a reference voltage;

[0010] The MCU main control module is used to control and adjust the simulated voltage output by the battery simulation device;

[0011] The output voltage module is used to output the simulated voltage;

[0012] The charging module is used to simulate the battery charging state.

[0013] Compared with the prior art, the beneficial effects of a battery simulation device provided by the present utility model are as follows: By means of a reference power supply module, an MCU main control module, and an output voltage module, voltages of different magnitudes can be output, that is, the battery simulation device can output analog voltages of different magnitudes to simulate the discharge function of a real battery; By connecting the charging module to an external power supply, the charging function of a real battery is simulated, providing a cornerstone for the construction of a BMS test system.

[0014] Optionally, it further includes a sampling module; the sampling module is connected to the reference power supply module, the MCU main control module, the output voltage module, and the charging module; the sampling module is used to sample the analog voltage and the external power supply and feedback them to the MCU main control module.

[0015] Optionally, the reference power supply module includes: a power supply voltage unit and a reference voltage circuit;

[0016] The power supply voltage unit is connected to the reference voltage circuit;

[0017] The power supply voltage unit is connected to the MCU main control module and the output voltage module;

[0018] The reference voltage circuit is connected to the output voltage module and the sampling module.

[0019] Optionally, the reference voltage circuit includes a first reference voltage unit and a second reference voltage unit;

[0020] The first reference voltage unit is connected to the power supply voltage unit and the second reference voltage unit;

[0021] The first reference voltage unit is connected to the output voltage module;

[0022] The second reference voltage unit is connected to the sampling module.

[0023] Optionally, the output voltage module includes: a PWM unit, a signal processing circuit, and an output circuit;

[0024] The PWM unit is connected to the output circuit through the signal processing circuit;

[0025] The PWM unit is connected to the MCU main control module;

[0026] The signal processing circuit is connected to the first reference voltage unit;

[0027] The output circuit is connected to the power supply voltage unit, the sampling module, and the charging module.

[0028] Optionally, the signal processing circuit includes: a filtering unit, an amplifying unit, and a first differential operational amplifier unit;

[0029] The filtering unit is connected to the first differential operational amplifier unit through the amplifying unit;

[0030] The filtering unit is connected to the PWM unit and the first reference voltage unit;

[0031] The first differential operational amplifier unit is connected to the output circuit.

[0032] Optionally, the output circuit includes: an output port and a discharging unit;

[0033] The output port is connected to the discharging unit, the first differential operational amplifier unit, the sampling module, and the charging module;

[0034] The discharging unit is connected to the sampling module.

[0035] Optionally, the sampling module includes: a voltage sampling circuit and a current sampling circuit;

[0036] The voltage sampling circuit is connected to the output port;

[0037] The current sampling circuit is connected to the discharging unit and the charging module;

[0038] The second reference voltage unit is connected to the voltage sampling circuit and the current sampling circuit;

[0039] The MCU main control module is connected to the voltage sampling circuit and the current sampling circuit.

[0040] Optionally, the voltage sampling circuit includes: a voltage sampling unit and a voltage AD sampling unit;

[0041] The voltage sampling unit is connected to the voltage AD sampling unit;

[0042] The voltage sampling unit is connected to the output port;

[0043] The voltage AD sampling unit is connected to the MCU main control module and the second reference voltage unit.

[0044] Optionally, the current sampling circuit includes: a current sampling unit, a second differential operational amplifier unit, and a current AD sampling unit;

[0045] The current sampling unit is connected to the current AD sampling unit through the second differential operational amplifier unit;

[0046] The current sampling unit is connected to the discharging unit and the charging module;

[0047] The current AD sampling unit is connected to the MCU main control module and the second reference voltage unit. Description of the Drawings

[0048] Figure 1 It is the overall block diagram of the present invention;

[0049] Figure 2 It is the pin connection diagram of the first reference voltage unit of the present invention;

[0050] Figure 3 It is the pin connection diagram of the second reference voltage unit of the present invention;

[0051] Figure 4 It is the pin connection diagram of the voltage sampling circuit of the present invention;

[0052] Figure 5 It is the pin connection diagram of the current sampling circuit of the present invention;

[0053] Figure 6 It is the output analog voltage circuit diagram of the present invention.

[0054] Description of the reference numerals: 1. Reference power supply module; 101. Power supply voltage unit; 102. First reference voltage unit; 103. Second reference voltage unit; 2. MCU main control module; 3. Output voltage module; 301. PWM unit; 302. Filtering unit; 303. Amplifying unit; 304. First differential operational amplifier unit; 305. Output port; 306. Discharging unit; 4. Charging module; 5. Sampling module; 501. Voltage sampling unit; 502. Voltage AD sampling unit; 503. Current sampling unit; 504. Second differential operational amplifier unit; 505. Current AD sampling unit. Detailed Embodiment

[0055] The following describes the preferred embodiments of the present invention with reference to the drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0056] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0057] Referring to Figures 1-5 As shown, the present utility model provides a battery simulation device, including a reference power supply module 1, an MCU main control module 2, an output voltage module 3, a charging module 4, and a sampling module 5;

[0058] The reference power supply module 1 is connected to the MCU main control module 2, the output voltage module 3, and the sampling module 5. The MCU main control module 2 is connected to the output voltage module 3 and the sampling module 5. The output voltage module 3 is connected to the charging module 4 and the sampling module 5. The charging module 4 is connected to the sampling module 5 and an external power supply.

[0059] The reference power supply module 1 is used to provide a working power supply and a reference voltage.

[0060] The MCU main control module 2 is used to control and adjust the analog voltage output by the battery simulation device.

[0061] The output voltage module 3 is used to output an analog voltage.

[0062] The charging module 4 is used to simulate the battery charging state.

[0063] The sampling module 5 is used to sample the analog voltage and the external power supply and feedback them to the MCU main control module 2.

[0064] The reference power supply module 1 includes a power supply voltage unit 101, a first reference voltage unit 102, and a second reference voltage unit 103.

[0065] The output voltage module 3 includes a PWM unit 301, a filtering unit 302, an amplifying unit 303, a first differential operational amplifier unit 304, an output port 305, and a discharging unit 306.

[0066] The sampling module 5 includes a voltage sampling circuit and a current sampling circuit. The voltage sampling circuit includes a voltage sampling unit 501 and a voltage AD sampling unit 502. The current sampling circuit includes a current sampling unit 503, a second differential operational amplifier unit 504, and a current AD sampling unit 505.

[0067] The power supply voltage unit 101 is connected to the MCU main control module 2 and the first reference voltage unit 102; the first reference voltage unit 102 is connected to the second reference voltage unit 103 and the filtering unit 302; the second reference voltage unit 103 is connected to the voltage AD sampling unit 502 and the current AD sampling unit 505; the MCU main control module 2 is connected to the discharge unit 306 through the PWM unit 301, the filtering unit 302, the amplifying unit 303, the first differential operational amplifier unit 304, and the output port 305; the MCU main control module 2 is connected to the voltage AD sampling unit 502 and the current AD sampling unit 505; the output port 305 is connected to the voltage sampling unit 501 through the output port 305; the output port 305 is connected to the charging module 4; the charging module 4 is connected to the current AD sampling unit 505 through the current sampling unit 503 and the second differential operational amplifier unit 504; the discharge unit 306 is connected to the current sampling unit 503; the voltage sampling unit 501 is connected to the voltage AD sampling unit 502.

[0068] The power supply voltage unit 101 is used to provide the working power supply for the MCU main control module 2 and the first reference voltage module.

[0069] The first reference voltage unit 102 is used to provide the working power supply for the second reference voltage unit 103 and also to provide the first reference voltage for the filtering unit 302.

[0070] The second reference voltage unit 103 is used to provide the second reference voltage for the voltage AD sampling unit 502 and the current AD sampling unit 505.

[0071] The MCU main control module 2 controls the analog voltage output by the battery simulation device by generating a control signal and adjusts the analog voltage output by the output voltage module 3 according to the sampling signal of the sampling module 5.

[0072] The PWM unit 301 is used to generate a PWM signal according to the control signal of the MCU main control module 2.

[0073] The filtering unit 302 is used to filter the first reference voltage and output an analog voltage according to the PWM signal.

[0074] The amplifying unit 303 is used to enhance the signal of the analog voltage.

[0075] The first differential operational amplifier unit 304 is used for anti-interference and suppressing the common-mode noise of the analog voltage.

[0076] The output port 305 is used to connect the power supply voltage unit 101, the charging module 4, and the voltage sampling unit 501.

[0077] The discharge unit 306 is used to output an analog voltage.

[0078] The voltage sampling unit 501 and the voltage AD sampling unit 502 are used to sample the voltages of the power supply voltage unit 101, the analog voltage, and the voltage signals of the external power supply, and feedback them to the MCU main control module 2.

[0079] The current sampling unit 503, the second differential operational amplifier unit 504, and the current AD sampling unit 505 are used to sample the analog voltage and the current signals of the external power supply, and feedback them to the MCU main control module 2.

[0080] The first reference voltage unit 102 includes a reference chip, which is used to convert the operating voltage provided by the power supply voltage unit 101 into a first reference voltage.

[0081] The second reference voltage unit 103 includes a voltage follower circuit, which is used to convert the operating power supply provided by the reference chip into a second reference voltage.

[0082] Through the reference power supply module 1, the MCU main control module 2, and the output voltage module 3, voltages of different magnitudes can be output, that is, the battery simulation device can output analog voltages of different magnitudes to simulate the discharge function of a real battery. Among them, the MCU main control module 2 adjusts the PWM signal of the PWM unit 301 in the output voltage module 3, thereby realizing the control of the magnitude of the output analog voltage.

[0083] By connecting to an external power supply through the charging module 4, the charging function of a real battery is simulated, providing a cornerstone for the construction of the BMS test system. The process of realizing the charging function through the charging module 4 refers to the prior art, and the present utility model will not elaborate on this.

[0084] Through the sampling module 5, the voltages of the power supply voltage unit 101, the analog voltage, and the voltage signals of the external power supply can be sampled, and the analog voltage and the current signals of the external power supply can also be sampled. These voltage signals and current signals are fed back to the MCU main control module 2, enabling the MCU main control module 2 to adjust the PWM signal output by the PWM unit 301 according to these voltage signals and current signals, and further realizing the precise adjustment of the magnitude of the analog voltage output by the output voltage module 3. This adjustment enables the battery simulation device to more accurately simulate the voltage output characteristics of a real battery, thereby providing a reliable simulation environment for the construction of the BMS (Battery Management System) test system.

[0085] Through the voltage AD sampling unit 502 and the current AD sampling unit 505 in the sampling module 5, it is convenient for subsequent SOC voltage and current calculations. The SOC voltage and current calculations refer to the prior art, and the present utility model will not elaborate on this.

[0086] Next, the circuit principle of the quick closing device will be further explained in combination with the specific implementation process as follows:

[0087] Refer to Figure 6 As shown, assume that the first reference voltage is Vref, the PWM signal output by the PWM unit is K, the voltage at pin 5 of the input terminal of the amplification unit is Ui, the voltage at pin 7 of the output terminal is Uo, the voltage at pin 3 of the first differential operational amplifier unit is U+, the voltage at pin 2 is U-, the sampling resistors R15C, R17C, R18C, R19C, R21C, R24C of the current sampling unit are in parallel, the voltage after parallel connection is Ug, the positive voltage of the output analog voltage U is VBAT+, and the negative voltage of the output analog voltage U is VBAT-; according to the output analog voltage circuit, the following calculation formulas can be obtained:

[0088] Ui = K * Vref;

[0089] U0 = 2 * Ui;

[0090] U = VBAT+ - VBAT-;

[0091] (U0 - U+) / R4C = (U+ - Ug) / R6C;

[0092] VBAT+ = U- / R9C * (R9C + R8C);

[0093] U+ = U-;

[0094] VBAT- = Ug;

[0095] Assume that R4C = R6C = R8C = R9C;

[0096] The analog voltage output by this circuit is: U = 2 * K * Vref;

[0097] Through this output analog voltage circuit, it can be found that the finally output analog voltage is related to the first reference voltage and the PWM signal. Therefore, by adjusting the PWM signal through the MCU main control module, analog voltages of different magnitudes can be output.

[0098] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A battery simulation device, characterized in that: include: Reference power module, MCU main control module, output voltage module and charging module; The reference power supply module is connected to the MCU main control module and the output voltage module, the MCU main control module is connected to the output voltage module, the output voltage module is connected to the charging module, and the charging module is connected to an external power supply; The reference power supply module is used to provide working power supply and reference voltage; The MCU main control module is used to control and adjust the simulated voltage output by the battery simulation device; The output voltage module is used to output the analog voltage; The charging module is used to simulate the battery charging state.

2. A battery simulation device according to claim 1, characterized in that: It also includes a sampling module; the sampling module is connected to the reference power module, the MCU main control module, the output voltage module, and the charging module; the sampling module is used to sample the analog voltage and the external power supply, and feed back to the MCU main control module.

3. A battery simulation device according to claim 2, characterized in that: The reference power supply module comprises: a power supply voltage unit and a reference voltage circuit; The power supply voltage unit is connected to the reference voltage circuit; The power supply voltage unit is connected to the MCU main control module and the output voltage module; The reference voltage circuit is connected to the output voltage module and the sampling module.

4. A battery simulation device according to claim 3, characterized in that: The reference voltage circuit includes a first reference voltage unit and a second reference voltage unit; The first reference voltage unit is connected to the power supply voltage unit and the second reference voltage unit; The first reference voltage unit is connected to the output voltage module; The second reference voltage unit is connected to the sampling module.

5. A battery simulation device according to claim 4, characterized in that: The output voltage module includes: a PWM unit, a signal processing circuit and an output circuit; The PWM unit is connected to the output circuit via the signal processing circuit; The PWM unit is connected to the MCU main control module; The signal processing circuit is connected to the first reference voltage unit; The output circuit is connected to the power supply voltage unit, the sampling module and the charging module.

6. A battery simulation device according to claim 5, characterized in that: The signal processing circuit includes: a filtering unit, an amplifying unit and a first differential operational amplifier unit; The filtering unit is connected to the first differential operational amplifier unit through the amplifying unit; The filtering unit is connected to the PWM unit and the first reference voltage unit; The first differential operational amplifier unit is connected to the output circuit.

7. A battery simulation device according to claim 6, characterized in that: The output circuit comprises: an output port and a discharge unit; The output port is connected to the discharge unit, the first differential operational amplifier unit, the sampling module, and the charging module; The discharge unit is connected to the sampling module.

8. A battery simulation device according to claim 7, characterized in that: The sampling module includes: a voltage sampling circuit and a current sampling circuit; The voltage sampling circuit is connected to the output port; The current sampling circuit is connected to the discharge unit and the charging module; The second reference voltage unit is connected to the voltage sampling circuit and the current sampling circuit; The MCU main control module is connected to the voltage sampling circuit and the current sampling circuit.

9. A battery simulation device according to claim 8, characterized in that: The voltage sampling circuit comprises: a voltage sampling unit and a voltage AD sampling unit; The voltage sampling unit is connected to the voltage AD sampling unit; The voltage sampling unit is connected to the output port; The voltage AD sampling unit is connected to the MCU main control module and the second reference voltage unit.

10. A battery simulation device according to claim 8, characterized in that: The current sampling circuit comprises: a current sampling unit, a second differential operational amplifier unit and a current AD sampling unit; The current sampling unit is connected to the current AD sampling unit via the second differential operational amplifier unit; The current sampling unit is connected to the discharge unit and the charging module; The current AD sampling unit is connected to the MCU main control module and the second reference voltage unit.

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