CN102590680A - Intelligent power supply capable of simulating characteristics of true battery - Google Patents

Abstract

The invention provides an intelligent power supply capable of simulating the characteristics of a true battery, which is characterized by comprising a battery model establishing module, a central processing unit, a program-controlled power supply module, a detection module and a power supply output interface, wherein the battery model establishing module is used for establishing a battery model; the battery model establishing module is used for establishing a battery model based on the mutual relation among voltage, current, electric quantity, internal resistance, temperature and aging times; the detection module is used for detecting the voltage, current, electric quantity and temperature parameters of the program-controlled power supply module; and inputting the detected parameters to a central processing unit; the central processing unit is used for supplying power to the program-controlled power supply module by using a model function established in the battery model establishing module according to the parameters input by the detection module and is used for setting a battery aging frequency parameter; the program control power supply module is used for outputting corresponding voltage and current according to the control of the central processing unit; the power supply output interface is used for transmitting the voltage and the current output by the program-controlled power supply module to a load.

Description

A smart power supply that mimics the characteristics of a real battery

technical field

The invention relates to an intelligent power supply, in particular to an intelligent power supply capable of simulating the characteristics of a real battery.

Background technique

Today, with the rapid update of electronic products, the speed of product update is getting faster and faster, and the time left for product development is getting shorter and shorter. Good test tools can greatly shorten the development and testing cycle, and gain valuable time for products to go to market. In the development process of electronic products, power test equipment is an indispensable development tool, which is widely used in our development, testing and production processes. When a power supply device is used to simulate a battery to power a product that uses a battery, such as a mobile phone, we usually call the power supply device a "fake battery". The current power supply equipment generally can only output at a fixed voltage value according to the value set by the user, that is, a stabilized voltage source. Factors such as the number of aging times change in real time. For developers and testers, the current regulated power supply cannot simulate these characteristics of a real battery, so that it cannot expose some problems that may occur when using a real battery or when testing with a real battery. A long cycle is required, and developers and testers are eager to find a power supply that can simulate the characteristics of real battery voltage, power, internal resistance, temperature, etc., so as to facilitate product development and debugging.

Contents of the invention

The main purpose of the present invention is to provide a power supply device capable of simulating the dynamic changes of real battery parameters such as voltage, power, and internal resistance with factors such as battery charging and discharging current, ambient temperature, and aging times.

In order to achieve the purpose of the above invention, the present invention proposes an intelligent power supply capable of simulating the characteristics of a real battery, which is characterized in that the intelligent power supply includes a battery model building module, a central processing unit, a program-controlled power supply module, a detection module and a power output interface;

The battery model building module is used to find the starting point on the curve with the initial voltage or power when discharging, detect the discharge power ΔQ according to the power detection module, find a new Vore value according to the curve relationship, and then control according to Vout=Vcore-I*R The program-controlled power supply module externally outputs voltage Vout; when charging: find the starting point on the curve with the initial voltage or power, detect the charging power ΔQ according to the power detection module, find a new Vore value according to the curve relationship, and then follow Vout=Vcore+I* R controls the external output voltage Vout of the programmable power supply module;

The detection module is used to detect the voltage, current, power and temperature parameters of the programmable power supply module; and input the detected parameters to the central processing unit;

The central processing unit is used to supply power to the programmable power supply module by using the model function established in the battery model establishment module according to the parameters input by the detection module, and is used to set the battery aging times parameter;

The program-controlled power supply module is used to output corresponding voltage and current according to the control of the central processing unit;

The power output interface is used to transmit the voltage and current output by the programmable power supply module to the load.

More preferably, the smart power supply also includes a memory.

More preferably, the detection module includes a voltage detection unit, a current detection unit, a power detection unit and a temperature detection unit.

More preferably, the smart power supply also includes an interface communication interface for data transmission between the smart power supply and external devices.

More preferably, the communication interface is USB, serial port or network port.

More preferably, the smart power supply also includes a display for displaying the status, voltage, power, temperature and current information of the smart power supply.

More preferably, the smart power supply also includes an input device.

More preferably, the input device is a physical button or a touch screen.

The advantage of the present invention is that the intelligent power supply proposed by the present invention that can simulate the characteristics of a real battery can simulate the impact of battery internal resistance on the output voltage, Vcore is the battery voltage when the battery is no-load, R is the internal resistance of the battery pack, and I is the discharge voltage. current, then the output voltage after the battery is loaded is V=Vcore-I*R. It can simulate the relationship between battery power and voltage with the charge and discharge current and charge and discharge time. When charging or discharging, the power detection unit detects the accumulated charge or discharge power and reports it to the CPU. The CPU dynamically adjusts the power according to the power and voltage relationship in the battery model. Output voltage, so the battery voltage slowly drops when discharging, and the battery voltage slowly rises when charging. The influence of aging times on battery characteristics can be simulated. When setting the initial parameters, the battery aging times can be set, and the CPU can call the battery model corresponding to the aging times. The impact of aging times on battery characteristics can be manifested as changes in internal resistance, changes in the relationship between battery voltage and power, etc. The influence of temperature on battery characteristics can be simulated, the ambient temperature can be set when setting the initial parameters, and the CPU can call the battery model corresponding to the ambient temperature. The influence of temperature on battery characteristics can be manifested as changes in internal resistance, changes in the relationship between battery voltage and power, etc.

Description of drawings

Fig. 1 is a block diagram of an intelligent power supply technology solution proposed by the present invention that can simulate the characteristics of a real battery.

Detailed ways

The technical solutions of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in FIG. 1 , FIG. 1 is a block diagram of an intelligent power supply technology solution proposed by the present invention that can simulate the characteristics of a real battery. As can be seen from Fig. 1, a kind of intelligent power supply that the present invention proposes can simulate the characteristics of a real battery includes: a central processing unit, a program-controlled power supply module, a detection module, a battery model building module and a power output interface; the battery model building module and The central processing unit is connected, the central processing unit is connected to the input end of the programmable power supply module, the output end of the programmable power supply module is connected to the input end of the detection module, and the output end of the detection module is connected to the output interface of the power supply ; The third end of the detection module is connected to the central processing unit. The intelligent power supply also includes a communication interface for transmitting data with external devices; the communication interface is connected with the central processing unit. The intelligent power supply also includes a display connected with the central processing unit. The intelligent power supply also includes a memory connected to the central processing unit. The intelligent power supply also includes a keyboard connected with the central processing unit. The detection module includes a voltage detection unit, a current detection unit, a power detection unit and a temperature detection unit.

The principle of this technical solution: the battery model building module first builds a battery model for each battery, and the battery model includes the relationship between voltage, current, power, internal resistance, temperature, and aging times, and stores the model in the storage device of the intelligent power supply Internally, when using the smart power supply, you only need to select the corresponding battery model, and after setting the initial conditions such as voltage, internal resistance, temperature, and aging times, the smart power supply can simulate the characteristics of the battery model for external power supply, and the output voltage, power and other characteristics will change with the Factors such as charge and discharge current, ambient temperature, and aging times change in real time.

Central processing unit: as the controller, responsible for the control of the entire device;

Communication interface: the interface for intelligent power supply and external device data transmission, which can be USB, serial port, network port, etc.;

Display: It is the display unit of the device, which can display the status, voltage, power and other information of the device;

Memory: the storage unit of the device;

Keyboard: It is the manual input device of the device, which can be a physical button or a touch screen;

Program-controlled power supply module: it is a power supply module controlled by the central processing unit, and its characteristics such as voltage and current can be controlled by the central processing unit;

Voltage detection: It is the detection module of the power output path, responsible for the detection of the output voltage;

Current detection: It is the detection module of the power output path, which is responsible for the detection of the output current;

Power detection: It is the detection module of the power output path, which is responsible for measuring the power consumption or charging power of external power consumption equipment, and feeding the information back to the central processing unit.

The general workflow of this technical solution is as follows:

1. On the computer, use the supporting tool software to make the battery model. The tool software has a default battery model for calling and can be edited and modified according to actual needs (such as directly calling the built-in battery model in the power supply, you can skip this step);

2. Copy the battery model parameter file to the internal memory of the power supply through the communication interface (such as directly calling the built-in battery model in the power supply, this step can be skipped);

3. Select the relevant parameters of the battery model to be called through the keyboard;

4. Set some initial parameters of the battery through the keyboard, such as the current battery voltage, power, aging times, ambient temperature, etc.;

5. Connect the power supply and electrical equipment, turn on the output switch, the power supply can simulate the relevant characteristics of the real battery to supply power to the electrical equipment, and the dynamic changes of the relevant characteristics will be displayed on the display.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limit them. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent replacements to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and all of them should be included in the scope of the present invention. within the scope of the claims.

Claims (8)

1. An intelligent power supply capable of simulating the characteristics of a real battery is characterized in that the intelligent power supply comprises a battery model building module, a central processing unit, a program-controlled power supply module, a detection module and a power output interface; The battery model building module is used to find the starting point on the curve with the initial voltage or power when discharging, detect the discharge power ΔQ according to the power detection module, find a new Vore value according to the curve relationship, and then control according to Vout=Vcore-I*R The program-controlled power supply module externally outputs voltage Vout; when charging: find the starting point on the curve with the initial voltage or power, detect the charging power ΔQ according to the power detection module, find a new Vore value according to the curve relationship, and then follow Vout=Vcore+I* R controls the external output voltage Vout of the programmable power supply module; The detection module is used to detect the voltage, current, power and temperature parameters of the programmable power supply module; and input the detected parameters to the central processing unit; The central processing unit is used to supply power to the programmable power supply module by using the model function established in the battery model establishment module according to the parameters input by the detection module, and is used to set the battery aging times parameter; The program-controlled power supply module is used to output corresponding voltage and current according to the control of the central processing unit; The power output interface is used to transmit the voltage and current output by the programmable power supply module to the load. 2. The intelligent power supply capable of simulating the characteristics of a real battery according to claim 1, wherein the intelligent power supply further comprises a memory. 3. An intelligent power supply capable of simulating the characteristics of a real battery according to claim 1 or 2, wherein the detection module includes a voltage detection unit, a current detection unit, a power detection unit and a temperature detection unit. 4. An intelligent power supply capable of simulating the characteristics of a real battery according to claim 1 or 2, characterized in that the intelligent power supply further comprises an interface communication interface for data transmission between the intelligent power supply and external devices. 5. The intelligent power supply capable of simulating the characteristics of a real battery according to claim 4, wherein the communication interface is a USB, a serial port or a network port. 6. An intelligent power supply capable of simulating the characteristics of a real battery according to claim 1 or 2, characterized in that the intelligent power supply also includes a display for displaying the state, voltage, power, temperature and current information of the intelligent power supply. 7. An intelligent power supply capable of simulating the characteristics of a real battery according to claim 1 or 2, characterized in that the intelligent power supply further comprises an input device. 8. The intelligent power supply capable of simulating the characteristics of a real battery according to claim 7, wherein the input device is a physical button or a touch screen.

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