Battery output simulation device

Abstract

The utility model relates to the technical field of circuits, in particular to a battery output simulation device. The device comprises a control circuit, wherein the control circuit is used for generating a plurality of mutually independent control signals; wherein the control signal is a digital quantity signal; and a plurality of analog output circuits in one-to-one correspondence with the plurality of control signals, wherein the analog output circuits are used for converting the corresponding control signals into analog quantity signals and outputting the analog quantity signals. Wherein an analog quantity signal output by the analog output circuit is an analog battery output signal. According to the utility model, the control circuit controls the analog output circuits in a centralized manner, so that the output of the analog output circuits can be flexibly adjusted in a digital control manner, the operation process is simplified, the operation difficulty is reduced, and the flexible application of equipment in different test environments and occasions is improved.

Description

Technical Field

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

[0002] With the development of battery technology, multi-string battery systems are becoming more and more common in various applications, especially in electric vehicles and energy storage systems. These systems require precise battery management systems (BMS) to monitor and control the status of the batteries to ensure safe and efficient operation.

[0003] During the development and testing of BMS protection boards, it's often necessary to connect multiple battery strings for actual testing. However, direct battery testing carries certain risks, such as overcharging, over-discharging, and even high currents that can burn out the circuit board. These potential safety hazards seriously impact the safety and reliability of the test.

[0004] To address these issues, a number of battery simulation devices have emerged on the market, enabling testing of BMS protection boards without the use of actual batteries. These devices simulate the voltage and current characteristics of batteries, providing a safe testing environment for BMS protection boards. However, most existing simulation devices lack effective centralized control, requiring testers to frequently switch between different devices during operation. This not only increases operational complexity but also limits the device's flexible application in diverse testing environments and scenarios. Utility Model Content

[0005] The utility model relates to a battery output simulation device, which can overcome certain defects of the prior art.

[0006] A battery output simulation device, comprising:

[0007] A control circuit, the control circuit is used to generate a plurality of independent control signals; wherein the control signals are digital signals; and

[0008] A plurality of analog output circuits corresponding one to one with the plurality of control signals, the analog output circuits being used to convert the corresponding control signals into analog signals and output them; wherein the analog signals output by the analog output circuits are analog battery output signals.

[0009] The present invention adopts a control circuit to generate multiple independent digital control signals, and the corresponding analog output circuits convert these control signals into analog battery output signals. Each analog output circuit can accurately output the analog battery output signal according to the corresponding control signal, which enables the battery output simulation device of the present invention to simulate a variety of different battery characteristics and test scenarios.

[0010] At the same time, the battery output simulation device of the present invention realizes centralized management and control of multiple simulation output circuits through a centralized control design, simplifies the operation process, reduces the operation difficulty, and improves the flexible application of the equipment in different test environments and occasions.

[0011] Preferably, it further includes: a first voltage conversion circuit, which is used to output a first power supply voltage for powering the control circuit and a second power supply voltage for powering the analog output circuit based on an external power supply.

[0012] Through the configuration of the first voltage conversion circuit, the first voltage conversion circuit can provide a suitable power supply voltage according to different requirements of the control circuit and the analog output circuit.

[0013] Preferably, the analog output circuit includes an isolation circuit, and the isolation circuit is used to achieve communication isolation between the signal output end of the control circuit and the signal input end of the analog output circuit.

[0014] By setting an isolation circuit in the analog output circuit, communication isolation between the control circuit signal output terminal and the analog output circuit signal input terminal can be effectively achieved, ensuring that the analog output circuit can respond to the control signal independently and accurately.

[0015] Preferably, the analog output circuit includes a signal converter, which is used to realize digital-to-analog conversion between the control signal and the analog battery output signal.

[0016] By integrating a signal converter in the analog output circuit, it is responsible for efficiently and accurately converting the digital control signal generated by the control circuit into an analog battery output signal.

[0017] Preferably, the analog output circuit includes an operational amplifier circuit, which is used to process the analog signal output by the signal converter to obtain an analog battery output signal.

[0018] Preferably, the operational amplifier circuit includes an operational amplifier follower circuit based on an operational amplifier.

[0019] By configuring an op amp circuit in the analog output circuit, and specifically using an op amp follower circuit based on an operational amplifier, the analog signal output by the signal converter can be amplified and buffered with high quality while keeping the phase and amplitude characteristics of the signal unchanged, thereby accurately generating the required analog battery output signal.

[0020] As preferred, the analog output circuit comprises a second voltage conversion circuit, which is configured to convert the second supply voltage into a third supply voltage for powering the isolation circuit, a fourth supply voltage for powering the signal converter, and a fifth supply voltage for powering the operational amplifier circuit.

[0021] By integrating the second voltage conversion circuit in the analog output circuit, the circuit is responsible for accurately converting the second supply voltage into three different levels of supply voltage: the third supply voltage is used to power the isolation circuit, ensuring the isolation and safety of signal transmission; the fourth supply voltage provides a stable working voltage for the signal converter, ensuring the accuracy and efficiency of digital-to-analog conversion; and the fifth supply voltage is specifically provided for the operational amplifier circuit to support its high-performance signal amplification and processing.

[0022] As preferred, the plurality of analog output circuits each has a corresponding positive output end and a negative ground end, and the negative ground ends of the plurality of analog output circuits are independent of each other.

[0023] By making the negative ground ends of all analog output circuits independent of each other, the analog output circuits can be connected in series as needed, so that the positive output ends are connected in sequence, while the negative ground ends are independently grounded, thereby maintaining the independence between channels, and the voltage range or current capacity of the output signal can be increased by connecting in series.

[0024] As preferred, it further comprises an interaction unit, which is configured to generate a control instruction and display an analog battery output signal; wherein the control circuit is configured to generate a corresponding control signal based on the control instruction.

[0025] As preferred, the interaction unit comprises an input circuit and a display circuit, the input circuit is configured to generate a control instruction and send it to the control circuit, and the display circuit is configured to receive and display an analog battery output signal.

[0026] By integrating the input circuit and the display circuit into the interaction unit, comprehensive and intuitive user interaction can be achieved, the input circuit provides a convenient way for the user to generate and send control instructions to the control circuit, thereby achieving precise regulation and control of system functions. At the same time, the display circuit can receive and display the output signal of the analog battery in real time, so that the user can grasp the working state and performance parameters of the battery at a glance. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the architecture of a battery output simulation device according to the embodiment 1 of the present application.

[0028] Figure 2 It is a schematic diagram of the architecture of an isolation circuit.

[0029] Figure 3 This is the circuit diagram of the op amp follower circuit. DETAILED DESCRIPTION

[0030] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the embodiments. It should be understood that the embodiments are only for explaining the utility model and are not intended to limit it.

[0031] Example 1

[0032] like Figure 1 A battery output simulation device is shown, characterized in that it includes:

[0033] A control circuit, the control circuit is used to generate a plurality of independent control signals; wherein the control signals are digital signals; and

[0034] A plurality of analog output circuits corresponding one to one with the plurality of control signals, the analog output circuits being used to convert the corresponding control signals into analog signals and output them; wherein the analog signals output by the analog output circuits are analog battery output signals.

[0035] The battery output simulation device in this embodiment generates multiple independent digital control signals upon receiving instructions from its control circuit. These signals are transmitted one-to-one to the analog output circuit, which converts them into simulated battery output signals, achieving accurate simulation of the multi-string battery system test environment. This device not only simplifies the testing process and avoids the safety hazards associated with directly using real batteries, but also improves testing efficiency through centralized control, effectively addressing the operational complexity and lack of flexibility in the development and testing of BMS protection boards.

[0036] This embodiment also includes: a first voltage conversion circuit, which is used to output a first power supply voltage for powering the control circuit and a second power supply voltage for powering the analog output circuit based on an external power supply.

[0037] The first voltage conversion circuit in this embodiment converts the output of the external power supply into the first and second supply voltages required by the control circuit and analog output circuit, ensuring stable power supply for the entire device. It also enables the control circuit to smoothly generate independent digital control signals, which are accurately converted into analog battery output signals by the analog output circuit. The use of this first voltage conversion circuit improves the stability and reliability of the device's operation, further enhancing its application in testing battery management system protection boards.

[0038] In this embodiment, the analog output circuit includes an isolation circuit, and the isolation circuit is used to achieve communication isolation between the signal output end of the control circuit and the signal input end of the analog output circuit.

[0039] like Figure 2 As shown, specifically, the analog output circuit in this embodiment includes an isolation circuit, and its isolation circuit can specifically adopt an IIC isolator of model π220N31. By setting the isolation circuit in the analog output circuit, communication isolation between the signal output end of the control circuit and the signal input end of the analog output circuit is achieved, which ensures the safety and stability of the control signal during the transmission process, and effectively avoids the risk of signal interference and false triggering.

[0040] In this embodiment, the analog output circuit includes a signal converter, which is used to implement digital-to-analog conversion between the control signal and the analog battery output signal.

[0041] Specifically, the analog output circuit includes a signal converter, which can be a digital-to-analog converter (DAC), which efficiently converts the digital control signal generated by the control circuit into an analog battery output signal. This DAC process not only ensures accurate signal transmission but also streamlines the entire device's use, enabling rapid response to testing requirements.

[0042] In this embodiment, the analog output circuit includes an operational amplifier circuit, which is used to process the analog signal output by the signal converter to obtain an analog battery output signal.

[0043] In this embodiment, the operational amplifier circuit includes an operational amplifier follower circuit based on an operational amplifier.

[0044] like Figure 3 As shown, specifically, the battery output simulation device in this embodiment has an operational amplifier circuit built into its analog output circuit. Specifically, the operational amplifier circuit utilizes an operational amplifier follower circuit (also known as a voltage follower) based on an operational amplifier. The operational amplifier follower circuit has the characteristics of high input impedance and low output impedance. It can effectively buffer and isolate signals, preventing signal loss and interference during transmission. In the battery output simulation device, the operational amplifier follower circuit receives the analog signal output by the signal converter, accurately receives the input signal through its high input impedance, and stably outputs the processed signal as a simulated battery output signal through its low output impedance. In addition, for the 0-5V output range, when the operational amplifier uses a follower structure, its characteristics enable high system accuracy to be achieved through open-loop control of the output voltage. This open-loop architecture is not only low-cost, but also simple and reliable in structure, making it suitable for battery output simulation devices with cost and space requirements.

[0045] In this embodiment, the analog output circuit includes a second voltage conversion circuit, which is used to convert the second supply voltage into a third supply voltage for powering the isolation circuit, a fourth supply voltage for powering the signal converter, and a fifth supply voltage for powering the operational amplifier circuit.

[0046] In this embodiment, a second voltage conversion circuit is integrated into the analog output circuit to flexibly convert the second supply voltage into multiple different levels of supply voltages, including a third supply voltage for powering the isolation circuit, a fourth supply voltage for powering the signal converter, and a fifth supply voltage for powering the operational amplifier circuit. This ensures that each key component can obtain a stable and adaptive power supply, thereby improving the reliability and performance of the entire analog output circuit.

[0047] In this embodiment, the multiple analog output circuits all have corresponding positive output terminals and negative ground terminals, and the negative ground terminals of the multiple analog output circuits are independent of each other.

[0048] In this embodiment, each analog output circuit is equipped with an independent positive output terminal and negative ground terminal, and the negative ground terminals of multiple analog output circuits are independent of each other, allowing each analog output circuit to independently perform signal output and ground processing, systematically avoiding mutual interference between signals. Furthermore, the analog output circuits can be connected in series. By connecting multiple analog output circuits in series, more complex and diverse battery pack output characteristics can be simulated, providing a more comprehensive and accurate simulation environment for the development and testing of battery management system protection boards.

[0049] In this embodiment, an interaction unit is further included, which is used to generate control instructions and display the simulated battery output signal; wherein the control circuit is used to generate corresponding control signals based on the control instructions.

[0050] In this embodiment, the interaction unit includes an input circuit and a display circuit. The input circuit is used to generate a control instruction and send it to the control circuit. The display circuit is used to receive and display the simulated battery output signal.

[0051] Specifically, in this embodiment, a sampling circuit may be provided after the op amp circuit to sample the analog battery output signal output by the op amp circuit in real time and transmit the sampled signal back to the control circuit. After receiving these sampled signals, the control circuit further transmits them to the display circuit of the interactive unit so that the user can intuitively see the current analog battery output signal.

[0052] In this embodiment, the device also includes an interactive unit that integrates an input circuit and a display circuit. The input circuit allows the user to generate control instructions through simple operations and send these instructions to the control circuit. The display circuit can receive and display the simulated battery output signal transmitted by the control circuit and the sampled signal returned by the sampling circuit in real time, providing the user with intuitive and clear visual feedback. Based on the information on the display circuit, the user can monitor and adjust the output of the analog output circuit in real time, achieving precise control of the test environment. This not only simplifies the operating process and improves work efficiency, but also ensures the accuracy and reliability of the analog output signal.

[0053] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on one or several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0054] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The embodiments shown are only part of the embodiments of the present invention, and the actual structure is not limited to them. Therefore, if a person skilled in the art is inspired by the above and designs a structure and embodiment similar to the technical solution without creatively designing it without departing from the inventive purpose of the present invention, it shall fall within the scope of protection of the present invention.

Claims

1. A battery output simulation device, characterized in that: include: A control circuit, the control circuit is used to generate a plurality of independent control signals; wherein the control signals are digital signals; and A plurality of analog output circuits corresponding one to one with the plurality of control signals, the analog output circuits being used to convert the corresponding control signals into analog signals and output them; wherein the analog signals output by the analog output circuits are analog battery output signals.

2. A battery output simulation device according to claim 1, characterized in that: It also includes: a first voltage conversion circuit, which is used to output a first power supply voltage for supplying power to the control circuit and a second power supply voltage for supplying power to the analog output circuit based on an external power supply.

3. A battery output simulation device according to claim 2, characterized in that: The analog output circuit includes an isolation circuit, which is used to achieve communication isolation between the signal output end of the control circuit and the signal input end of the analog output circuit.

4. A battery output simulation device according to claim 3, characterized in that: The analog output circuit includes a signal converter, which is used to realize digital-to-analog conversion between the control signal and the analog battery output signal.

5. A battery output simulation device according to claim 4, characterized in that: The analog output circuit includes an operational amplifier circuit, which is used to process the analog signal output by the signal converter to obtain an analog battery output signal.

6. A battery output simulation device according to claim 5, characterized in that: The operational amplifier circuit includes an operational amplifier follower circuit based on an operational amplifier.

7. A battery output simulation device according to claim 6, characterized in that: The analog output circuit includes a second voltage conversion circuit, which is used to convert the second power supply voltage into a third power supply voltage for powering the isolation circuit, a fourth power supply voltage for powering the signal converter, and a fifth power supply voltage for powering the operational amplifier circuit.

8. A battery output simulation device according to claim 6, characterized in that: The multiple analog output circuits each have a corresponding positive output terminal and a negative ground terminal, and the negative ground terminals of the multiple analog output circuits are independent of each other.

9. The battery output simulation device according to claim 1, characterized in that: It also includes an interaction unit, which is used to generate control instructions and display simulated battery output signals; wherein the control circuit is used to generate corresponding control signals based on the control instructions.

10. The battery output simulation device according to claim 1, characterized in that: The interactive unit includes an input circuit and a display circuit. The input circuit is used to generate a control instruction and send it to the control circuit. The display circuit is used to receive and display the analog battery output signal.

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