CN106645925A - Electric energy storage device power test system - Google Patents

Abstract

The invention discloses a power testing system for electric energy storage equipment. The electric energy storage device is connected to the host computer through the power test equipment. The power test equipment includes a precision power meter, a programmable power supply and a programmable load. Correspondingly controlled precision power meter module, programmable power supply module and programmable load module, each module includes a connection module, command module and user operation module for connecting, communicating and measuring multiple different types of electric energy storage devices. The system of the invention can effectively control the power meter, power supply and electronic load, and the control process is convenient, fast and effective, and can save a lot of manpower and material resources.

Description

A power test system for electric energy storage equipment

technical field

The invention relates to a test system, in particular to a power test system for electric energy storage equipment.

Background technique

As electric energy storage devices such as batteries and capacitors are more and more widely used in real life, the detection and charge and discharge control of such electric energy storage devices are becoming more and more important. If the power detection and charging and discharging of the electric energy storage device can be successfully performed, it will be beneficial to the protection of the electric energy storage device and the normal operation of the electric device. In the prior art, there is a lack of systems or devices that can better monitor and manage the charging and discharging of electric energy storage devices in real time.

Contents of the invention

The main problem to be solved by the present invention is: how to realize the connection and communication of multiple different types of equipment (precision power meters, programmable power supplies and programmable loads) through only one host computer, and how to effectively control the operation of electric energy storage equipment Output status, real-time high-precision measurement of charging and discharging power status of electric energy storage equipment, making the test process convenient, reliable, intelligent and automatic, and the test effect is accurate and timely. In order to solve the above problems, the present invention proposes a power test system for electric energy storage equipment, which can be widely used.

According to the document of the device, the present invention utilizes Matlab/Simulink to present the system. One of the main considerations of the present invention is how to control the device, and the other is how to make it easy for users to use. The technical scheme adopted in the present invention is:

The precision power meter, programmable power supply and programmable load are all connected to the host computer through a serial port, and the host computer is built with software modules for connection and communication of different types of equipment (precision power meter, programmable power supply and programmable load).

The power testing equipment includes: a precision power meter, a programmable power supply and a programmable load. The electric energy storage device is connected to a programmable power supply, and the programmable power supply charges it; the electric energy storage device is connected to a programmable load to discharge the programmable load; the electric energy storage device is connected to a precision power meter, and the voltage and current are measured through the precision power meter. , electric power and other measurements; the precision power meter, programmable power supply and programmable load are all connected to the host computer, and the precision power meter, programmable power supply and programmable load are respectively connected and controlled in the host computer through Matlab/simulink. A power meter module, a programmable power supply module and a programmable load module, each of which includes a connection module, an instruction module and a user operation module for connecting, communicating and measuring multiple different types of electric energy storage devices. When the connection module, the instruction module and the user operation module communicate with each other and the communication between the connection module and the power test equipment, the two different communication types of writing and query are respectively written with encapsulation functions for communication.

The user operation module is used for user input control and display information, the instruction module is used for translating the control information input by the user into corresponding instructions, and the connection module is used for sending instructions to the power test equipment through the serial port for control. When working, the information data detected by the power testing equipment is directly sent to the user operation module for display after passing through the connection module. The user's operation will also input control requirements through the user operation module, and then the instrument will be controlled accordingly through the command module and the connection module in turn.

For different power test equipment, the connection module constructs the unique corresponding instance path of the power test equipment connected to each electric energy storage device, and realizes the connection between different power test equipment of the same model by modifying the instance path of the power test equipment corresponding to the electric energy storage device. Connection switching.

The user operation module is constructed in a modular manner using Matlab/simulink tools, adopts a modular design, and has scalability. Simulink runs in real time during operation and is synchronized with physical time. In addition, the user operation module of the present invention can be added to the Matlab/simulink custom library, and can be used together with other original function modules in the simulink custom library when applied.

The function of the connection module: the host computer can be connected with multiple different hardware devices through the serial port at the same time through the connection module. Because each device has a unique ID number through the serial port data cable, each device has its own path after the connection is successful, and then use the connection module on the Matlab platform to modify the device instance path of the target device to connect After success, the device will buzz to indicate a successful connection. According to this method, any device of the same model can be connected and communicated. Multiple serial ports on a computer can connect to multiple different hardware devices, and each hardware device can connect to several electric energy storage devices. The WT1800 power detector used in this system can also perform multi-channel detection, so the present invention can realize the connection and communication of multiple devices.

The function of the command module: the command module is encapsulated in the Matlab software, and the module contains hundreds of commands with a unified format, which are relatively common and can be used for related tests on the equipment. The instructions mainly include basic parts such as input and output settings, measurement settings, and basic mode selection. Through programming instructions, charge and discharge the equipment and perform high-precision measurement, so as to control and adjust the entire system. For the composition and configuration of the specific instruction module, see the specific implementation below.

The function of the user operation module: the user operation module is built based on simulink. After the instruction module is packaged, a visual interface is realized, and the user can directly operate it. The user is easy to understand and easy to use. At the same time, the simulink tool is synchronized with the physical time, and the system can be monitored and controlled in real time, thus realizing the goal of remote synchronous detection. Moreover, the simulink tool can complete intelligent automatic monitoring for a long time. Users can independently set the monitoring time or design control means to realize automatic control without the need for staff to observe all the time.

The beneficial effects of the present invention are:

The invention realizes the connection and communication of multiple different types of electric power detection instruments through only one host computer, effectively controls the output status of the electric energy storage equipment, and measures the charging and discharging power status of the electric energy storage equipment in real time with high precision, so that the test The process is convenient, reliable, intelligent and automatic, and the test results are accurate and timely.

The present invention can be operated remotely, effectively controls the power meter, power supply, and electronic load, and the control process is convenient, fast, and effective, and can save a lot of manpower and material resources, realizes intelligent automatic monitoring, and can monitor the status without people for a long time down to work.

The system of the present invention has good versatility and advancement, and also has very good expansibility. Users can expand and improve the system according to their own needs, such as storing historical data obtained for a long time.

The invention has expandability and can perform multi-channel testing functions, so as to realize the testing of multiple electric energy storage devices.

Description of drawings

Fig. 1 is a connection block diagram of the system of the present invention.

detailed description

The present invention will be further described below in conjunction with drawings and embodiments.

Embodiments of the present invention and its implementation process are as follows:

In a preferred embodiment of the present invention, the electric energy storage device test system uses the Matlab/simulink platform, which has good compatibility and scalability, can be widely promoted, and can realize long-term intelligent control and high-precision automation.

In the embodiment, the precise power meter is used to accurately acquire the situation in real time, and the data is added to the database to store the data, and the collected data is stored and analyzed.

Step 1: Solve the connection and communication between the upper computer and the device.

The ID number and path parameters of the device are required to communicate with the device, and the parameters can be obtained for a specific device in tmtool. At the same time, use the built-in generation function of tmtool in matlab to communicate with the device, but this communication is still too rough for users, and needs to be packaged and optimized.

First of all, the connection of devices requires communication operations, and there are two main types of communication, namely writing and querying. The writing module uses the above two communication methods to write the corresponding encapsulation functions respectively.

Secondly, after the device is connected, it is necessary to perform frequent read and write access operations on the device, and at the same time, reasonably save the connection of the device to ensure efficiency.

In this step, the communication between the upper computer and the device is realized, and the packaging makes it easy to use.

Step 2: Implement the commands described in the device documentation.

Through the integrated analysis of the instructions and the synthesis of the information required for each step, five types of configurable information for each instruction are extracted:

1. Initialize whether to send information

Indicates whether commands need to be sent to the device when the program starts running. In the code, it is mainly controlled through the access array.

The implementation idea is: use the persistent keyword in Matlab to use the same access array every time you enter the function, and the value of the corresponding position of the access will increase by one every time you access a certain command, indicating that this command is in the process of system startup this time has been visited several times. In the subsequent code, whether to actually execute the instruction is selected by judging whether the value of the access corresponding to the instruction is greater than 0.

The initial access is 0 during initialization, which means that no instruction needs to be executed when accessing for the first time, and the initialization with a value of 0 mainly corresponds to the input type that will call callback when the program starts to execute. This property will be described in detail in the third step.

2. Query or write commands

Corresponding to the operation method in the communication module, the specific value is related to whether the instruction needs to return a value. Configure through the array method, 1 means query, 0 means write.

3. The number of additional parameters

Indicates whether the command has additional optional parameters. Configure through the value array, and the program obtains the value of the constituent instruction through the corresponding value in the value array during the running process.

4. Command aliases

A short name used to represent a command. Use the param array for configuration.

This name is unique throughout the program and is the instruction's identity. External functions call instructions in this group by this name. At the same time, in the mask package of the third step, it is also guaranteed that the name of the mask variable of this command is also this alias, which is convenient for obtaining user input.

5. Command format

The command format indicates the format of a certain command, that is, how to concatenate the command sent to the device according to multiple required user input values. This command is closely related to the third parameter, which is mainly configured by the command array.

After the configuration code ends, enter the command execution process. The execution sequence is to find out all the corresponding configurations according to the command alias, and read the command parameters and command format according to the configuration parameters. After generating the actual command, communicate with the device according to the method provided in the previous step to achieve the purpose of controlling the device.

This step truly realizes the user's control over the lower computer.

third step:

At this point, it is necessary to be able to optimize the instruction execution method in the previous step. The graphical interface uses the sub-system and mask package in simulink.

In the mask package, write-in instructions are mainly stored.

The characteristic of this instruction is that the number of calls is small, and at the same time, in most cases, some parameters need to be added manually. The mask package can just meet this requirement. There are commonly used drop-down menus, input boxes and buttons in the graphical interface encapsulated by mask. With the support of multiple types of input, the write command can be well encapsulated, and the user does not need to know how each command is sent to the device, but only needs to know the meaning of each input item to use it conveniently.

Beneath the surface used by the user is a callback function in simulink. Callback is an item of mask configuration. After the value of each item changes, the system will actively call the small program segment written inside the callback. Therefore, you only need to write the statement that triggers the sending of the corresponding command in the callback, that is, the command line statement written in the second step.

When the mask is running for the first time, except for the button type, all other input types will call the set callback once. For the correctness of the settings, you can manually disable this type of initialization callback in the code. This is why the access attribute is 0. Of course, if a button does not call a callback function during initialization, you only need to set the access attribute to 1 to use it normally during configuration.

The most considered above is the writing of instructions, and a small number of instructions have return values. For user experience, the return value cannot be output on the command line. Therefore, there is a fixed area set in advance on the interface, and each return value will be directly written into that area, which is convenient for users to view the return value.

Here, take the inputState command that appeared above as an example to illustrate how to perform mask encapsulation. First of all, since this command is a write command and requires an open input at the same time, the editor is used as the input box of the command to receive input. And if it is a limited input, you can use popup, that is, the drop-down list type to control. And if you don't need to input, you can directly use the button, that is, the button type.

In the properties of the editor, you need to set the variable name as an alias inputState in the mask configuration to facilitate the program to obtain it. At the same time, as mentioned above, in the callback column, it is necessary to actively call the trigger command of the corresponding module to notify the program to obtain the latest value and send it to the device.

In the Sub-system package, query-type instructions are mainly stored. This command is called many times, but the parameters of each call are basically the same. Therefore, similar to step 2, it is necessary to first use the query function to encapsulate the query of the device. Then, use the subsystem to encapsulate the query function, and finally provide the query result to the outside world, and all users in the middle can ignore it.

At the same time, the significance of Sub-system, that is, the encapsulation of subsystems, does not stop there. Its main function is to encapsulate specific implementation details for users and only retain ports. In this encapsulation method, the readability and reliability of the module are greatly improved. In the subsystem package, in order to interact with the outside world, several in ports and out ports need to be specified. The number of each port depends on the input that the module depends on or the output that needs to be exposed to the outside world.

In addition, after encapsulating the Sub-system, it can be added to SimulinkLibrary Brower in some ways for subsequent use. For the specific method, please refer to the link at the end of the article, and will not repeat it in the article. Here, the subsystem is not just an application, but a module in Simulink. When users need to use this subsystem, they only need to find and configure it. Modularity is greatly enhanced.

For the sub-system package of the high-precision analyzer, it is necessary to provide four outputs, which respectively represent the voltage, current, and power values read by the device and the power value calculated by Matlab, and no input is required.

For the voltage, you need to write another function to read the voltage specifically for reading. At the same time, a square wave generator is needed to trigger the operation of the read function regularly. An output point is also required as the output of the function. At this point, the voltage value can already be acquired by the outside.

Claims (7)

1. A power test system for electric energy storage equipment, characterized in that: the electric energy storage equipment is connected with the host computer through the power test equipment, and the host computer is constructed with Matlab for connecting and communicating with multiple different types of electric energy storage equipment Measured software modules. 2. A power testing system for electric energy storage equipment according to claim 1, wherein the power testing equipment includes a programmable power supply, a precision power meter and a programmable load; the electric energy storage equipment is connected to the programmable power supply , the programmable power supply charges the electric energy storage device; the electric energy storage device is connected to a programmable load, and the electric energy storage device discharges to the programmable load; the electric energy storage device is connected to a precision power meter, and the voltage, current, Measurement of electric power etc. The precision power meter, programmable power supply and programmable load are all connected to the host computer through the serial port, and the precision power meter module, programmable power meter module, programmable A power supply module and a programmable load module, each of which includes a connection module, an instruction module and a user operation module for connecting, communicating and measuring different types of power test equipment. The user operation module is used for the user to input control information, the instruction module is used for translating the control information input by the user into corresponding instructions, and the connection module is used for sending the instructions to the power testing equipment through the serial port. 3. A power test system for electric energy storage equipment according to claim 2, characterized in that: when the connection module, the command module and the user operation module communicate with each other and the communication between the connection module and the power test equipment, for The two different communication types of write and query write wrapper functions for communication respectively. 4. A power test system for electric energy storage devices according to claim 2, characterized in that: for different electric energy storage devices, the connection module constructs a unique corresponding instance path for power test devices connected to each electric energy storage device, By modifying the instance path of the power testing equipment corresponding to the electric energy storage equipment, the connection switching of different power testing equipment of the same model is realized. 5. A power test system for electric energy storage equipment according to claim 2, wherein the user operation module is built in a modular manner using the simulink tool in Matlab. 6. A kind of electric energy storage equipment power test system according to claim 2, it is characterized in that: the user operation module of the present invention can be added in the simulink storehouse of Matlab, can be used with original other functions in the simulink storehouse The modules are used together. 7. A power testing system for an electric energy storage device according to claim 1, wherein the electric energy storage device is a battery, a capacitor or a super capacitor.