Lithium battery simulator and its simulation system

Abstract

The present application provides a lithium battery simulator and a simulation system thereof. In the lithium battery simulator, a current detection device is used to detect the current data of a target load in real time; a voltage detection device is used to detect the voltage data of a target load in real time; a control device is used to receive the current data and the voltage data, and the control device is also used to be electrically connected to the target load; a battery simulator is connected to the control device in communication, and the battery simulator is used to receive the current data and the voltage data sent by the control device, and outputs predetermined data according to the current data and the voltage data and sends it to the control device, so that the control device provides the target load with a predetermined voltage corresponding to the predetermined data, wherein the predetermined data is the voltage data output by the battery simulator simulating the lithium battery. The present application realizes the simulation of the discharge process of a lithium battery.

Description

Technical Field

[0001] The present application relates to the field of battery simulation, and in particular, to a lithium battery simulator and a simulation system thereof. Background Art

[0002] Currently, the use of handheld mobile devices is very popular, so lithium batteries play a key role in the power supply of handheld devices. How to create an optimized system to utilize the full power of the battery has become a burden for system designers. Therefore, the impact of load current data on lithium battery discharge is studied, and the characteristics of the battery under different discharge behaviors are analyzed. Then, based on these characteristics, the optimal discharge mode is found in order to increase the discharge life of the lithium battery.

[0003] The use of actual lithium batteries to study discharge behavior requires repeated charging and discharging of the lithium batteries, which will cause great inconvenience. In addition, since the life of lithium batteries is limited, the number of charge and discharge cycles also requires frequent replacement, which will cause pollution to the environment.

[0004] However, existing battery simulators are mostly used in the automotive field, and there is a lack of simulators for lithium batteries.

[0005] The above information disclosed in the background technology section is only used to enhance the understanding of the background technology of the technology described in this article. Therefore, the background technology may contain certain information that does not form the prior art known in this country for those skilled in the art. Summary of the invention

[0006] The main purpose of the present application is to provide a lithium battery simulator and a simulation system thereof to solve the problem of lack of lithium battery simulators in the prior art.

[0007] In order to achieve the objective, according to one aspect of the present application, a lithium battery emulator is provided, the lithium battery emulator comprising a current detection device, a voltage detection device, a control device and a battery simulator, wherein the current detection device is used to be electrically connected to a target load, and the current detection device is used to detect the current data of the target load in real time; the voltage detection device is used to be electrically connected to the target load, and the voltage detection device is used to detect the voltage data of the target load in real time; the control device is electrically connected to the current detection device and the voltage detection device respectively, the control device is used to receive the current data and the voltage data, and the control device is also used to be electrically connected to the target load; the battery simulator is communicatively connected to the control device, the battery simulator is used to receive the current data and the voltage data sent by the control device, output predetermined data according to the current data and the voltage data and send it to the control device, so that the control device provides the target load with a predetermined voltage corresponding to the predetermined data, wherein the predetermined data is the voltage data output by the battery simulator simulating a lithium battery.

[0008] Optionally, the current data and the voltage data are both analog signals, the control device includes a first microcontroller, the first microcontroller includes a first analog-to-digital conversion module or a first digital-to-analog conversion module, the first microcontroller is electrically connected to the current detection device and the voltage detection device respectively, the first microcontroller is also used to convert the current data and the voltage data into corresponding first digital data through the first analog-to-digital conversion module and send them to the battery simulator, or the first microcontroller is also used to receive the predetermined voltage through the first digital-to-analog conversion module, and convert the predetermined voltage into a first analog voltage and send it to the target load.

[0009] Optionally, in the case where the first microcontroller includes the first analog-to-digital conversion module and the predetermined voltage is a digital signal, the lithium battery emulator further includes a first digital-to-analog converter, the first microcontroller is electrically connected to the target load through the first digital-to-analog converter, the first digital-to-analog converter is used to receive the predetermined voltage, and convert the predetermined voltage into a first analog voltage and send it to the target load, in the case where the first microcontroller includes the first digital-to-analog conversion module, the lithium battery emulator further includes a first analog-to-digital converter, the first microcontroller is electrically connected to the current detection device and the voltage detection device respectively through the first analog-to-digital converter, the first analog-to-digital converter is used to receive the current data and the voltage data, and convert the current data and the voltage data into fourth digital data and send them to the first microcontroller. .

[0010] Optionally, the lithium battery emulator further includes a voltage regulator, and the first digital-to-analog converter is electrically connected to the target load via the voltage regulator.

[0011] Optionally, the current data and the voltage data are both analog signals, the control device includes a second microcontroller, the second microcontroller includes a second analog-to-digital conversion module and a second digital-to-analog conversion module, the second microcontroller is further used to convert the voltage data and the current data into corresponding second digital data through the second analog-to-digital conversion module and send them to the battery simulator, the second microcontroller is further used to convert the predetermined voltage into a second analog voltage through the second digital-to-analog conversion module and send them to the target load.

[0012] Optionally, the current data and the voltage data are both analog signals, the predetermined voltage is a digital signal, and the lithium battery emulator also includes a second digital-to-analog converter and a first analog-to-digital converter, wherein the control device is electrically connected to the target load through the second digital-to-analog converter, and the second digital-to-analog converter is used to convert the predetermined voltage into a third analog voltage and send it to the target load; the first analog-to-digital converter is electrically connected to the current detection device, the voltage detection device and the control device, respectively, and the first analog-to-digital converter is used to convert the current data and the voltage data into third digital data and send them to the control device.

[0013] Optionally, the current detection device includes a current sensor and a second analog-to-digital converter, wherein the current sensor is used to be electrically connected to the target load, and the current sensor is used to detect analog current data in real time; the second analog-to-digital converter is electrically connected to the current sensor and the control device respectively, and the second analog-to-digital converter is used to convert the analog current data into digital current data.

[0014] Optionally, the voltage detection device includes a voltage sensor and a third analog-to-digital converter, the voltage sensor is used to be electrically connected to the target load, and the voltage sensor is used to detect analog voltage data in real time; the third analog-to-digital converter is electrically connected to the voltage sensor and the control device respectively, and the third analog-to-digital converter is used to convert the analog voltage data into the voltage data.

[0015] Optionally, the battery simulator comprises a DualFoil model.

[0016] According to another aspect of the present application, a lithium battery simulation system is also provided, and the lithium battery simulation system includes a load and any one of the lithium battery simulators described above.

[0017] By applying the technical solution of the present application, in the lithium battery simulator, the current detection device obtains the current data of the target load in real time, and the voltage detection device obtains the voltage data of the target load in real time. The voltage data represents the current supply voltage of the lithium battery. The control device receives the voltage data and the current data and sends them to the battery simulator, so that the battery simulator simulates the lithium battery to output predetermined data to the control device based on the voltage data and the current data, so that the control device provides the predetermined voltage corresponding to the predetermined data to the target load to simulate the output state and discharge characteristics of the real lithium battery. The lithium battery simulator of the present application can simulate the discharge process of the lithium battery, so there is no need to use a real lithium battery for discharge, and the simulation of the lithium battery is realized. It can be more convenient to study the response of the target load under different lithium battery conditions, and because there is no need to use a real lithium battery, it is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 A schematic structural diagram of a lithium battery simulator according to an embodiment of the present application is shown;

[0020] Figure 2 An equivalent circuit diagram of a lithium battery and a load according to an embodiment of the present application is shown;

[0021] Figure 3 An equivalent circuit diagram of a lithium battery simulator according to an embodiment of the present application is shown;

[0022] Figure 4 A schematic structural diagram of a lithium battery simulator according to a specific embodiment of the present application is shown;

[0023] Figure 5 A comparison diagram of an actual lithium battery discharge curve according to an embodiment of the present application and a lithium battery simulator simulated discharge curve is shown.

[0024] The above drawings include the following reference numerals:

[0025] 10. Current detection device; 20. Voltage detection device; 30. Control device; 40. Battery simulator; 50. Target load; 60. Second digital-to-analog converter; 70. Voltage regulator; 80. First analog-to-digital converter; 90. Voltage source; 100. First resistor; 110. Capacitor; 120. Second resistor; 130. Lithium battery simulator. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element may be directly on the other element, or there may be intermediate elements. Moreover, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element, or "connected" to the other element through a third element.

[0029] As introduced in the background technology, the prior art lacks the problem of lithium battery simulator. In order to solve the above problem, the present application proposes a lithium battery simulator and a simulation system thereof.

[0030] According to a typical embodiment of the present application, a lithium battery simulator is provided, such as Figure 1 As shown, the above-mentioned lithium battery simulator includes a current detection device 10, a voltage detection device 20, a control device 30 and a battery simulator 40, wherein the above-mentioned current detection device 10 is used to be electrically connected to the target load 50, and the above-mentioned current detection device 10 is used to detect the current data of the above-mentioned target load 50 in real time; the above-mentioned voltage detection device 20 is used to be electrically connected to the above-mentioned target load, and the above-mentioned voltage detection device 20 is used to detect the voltage data of the above-mentioned target load 50 in real time; the above-mentioned control device 30 is electrically connected to the above-mentioned current detection device 10 and the above-mentioned voltage detection device 20 respectively, and the above-mentioned control device 30 is used to connect The control device 30 receives the above-mentioned current data and the above-mentioned voltage data, and is also used to be electrically connected to the above-mentioned target load 50; the above-mentioned battery simulator 40 is communicatively connected to the above-mentioned control device 30, and the above-mentioned battery simulator 40 is used to receive the above-mentioned current data and the above-mentioned voltage data sent by the above-mentioned control device 30, output predetermined data according to the above-mentioned current data and the above-mentioned voltage data, and send it to the above-mentioned control device 30, so that the above-mentioned control device 30 provides the above-mentioned target load 50 with a predetermined voltage corresponding to the above-mentioned predetermined data, wherein the above-mentioned predetermined data is the voltage data output by the above-mentioned battery simulator 40 simulating the lithium battery.

[0031] In the above-mentioned lithium battery simulator, the above-mentioned current detection device obtains the current data of the target load in real time, and the voltage detection device obtains the voltage data of the target load in real time, and the voltage data represents the current supply voltage of the lithium battery. The above-mentioned control device receives the above-mentioned voltage data and the above-mentioned current data and sends them to the battery simulator, so that the above-mentioned battery simulator simulates the lithium battery to output predetermined data to the above-mentioned control device according to the above-mentioned voltage data and the above-mentioned current data, so that the above-mentioned control device provides the predetermined voltage corresponding to the above-mentioned predetermined data to the above-mentioned target load to simulate the output state and discharge characteristics of the real lithium battery. The above-mentioned lithium battery simulator of the present application can simulate the discharge process of the lithium battery, so that there is no need to use a real lithium battery for discharge, and the simulation of the lithium battery is realized. It can be more convenient to study the response of the above-mentioned target load under different lithium battery conditions, and because there is no need to use a real lithium battery, it is more environmentally friendly.

[0032] In actual application, the equivalent circuit diagram of lithium battery and load is as follows: Figure 2 The lithium battery equivalent circuit includes a voltage source 90 and a first resistor 100, wherein the open loop voltage of the voltage source 90 is V oc , the resistance of the first resistor 100 is R i , the load equivalent circuit includes a capacitor 110 and a second resistor 120. If the current of the line is I, then the observed predetermined voltage V b for

[0033] V b =V oc -I×R i

[0034] When the lithium battery is discharged, V oc Will follow R i Based on this circuit mode, the equivalent circuit diagram of the lithium battery simulator 130 is as follows: Figure 3 As shown, the simulator performs the following steps: Step 1), obtaining voltage data and current data of the load; Step 2), sending the voltage data and the current data to the battery simulator to calculate V according to the voltage data and the current data. oc and R i ; Step 3), V calculated in step 2) oc and R i Assign values ​​to the voltage source 90 and the first resistor so that the lithium battery equivalent circuit outputs a predetermined voltage; step 4), repeat the above steps 1), 2) and 3) in sequence.

[0035] Specifically, the target load is a handheld device, that is, the lithium battery is used to power the handheld device. Moreover, compared with the bulky battery simulators in the prior art, such as the battery simulators for powering electric vehicles, the components of the lithium battery simulator of the present application, such as the current detection device, the voltage detection device, the control device, and the battery simulator, are all small components. Therefore, the lithium battery simulator of the present application, which is composed of these small components, is small in size, that is, the present application realizes the miniaturization of the battery simulator, which is easy to carry.

[0036] In the actual application process, the above current data and the above voltage data are both analog signals. At this time, in order to further ensure the normal operation of the above lithium battery simulator and further realize the simulation of the discharge characteristics of the lithium battery, according to a specific embodiment of the present application, the above control device includes a first microcontroller, the above first microcontroller includes a first analog-to-digital conversion module or a first digital-to-analog conversion module, the above first microcontroller is electrically connected to the above current detection device and the above voltage detection device respectively, the above first microcontroller is also used to convert the above current data and the above voltage data into corresponding first digital data through the above first analog-to-digital conversion module and send them to the above battery simulator, or the above first microcontroller is also used to receive the above predetermined voltage through the above first digital-to-analog conversion module, and convert the above predetermined voltage into the first analog voltage and send it to the above target load. In this embodiment, by selecting the above first microcontroller with analog-to-digital conversion function, or selecting the above first microcontroller with digital-to-analog conversion function, it is further ensured that the overall occupied area of ​​the above simulator is small, the miniaturization of the simulator is further realized, and the above simulation is further ensured to be easy to carry.

[0037] Specifically, in the above-mentioned first microcontroller, a 10-bit analog-to-digital converter can be built into the microcontroller, and the sampling interval time of the analog-to-digital converter can be set to 19.72μs. After the above-mentioned current data and the above-mentioned voltage data are converted into corresponding first digital data by the above-mentioned analog-to-digital converter, they are transmitted to the above-mentioned battery simulator through the network interface.

[0038] In another specific embodiment, when the first microcontroller includes the first analog-to-digital conversion module and the predetermined voltage is a digital signal, the emulator of the lithium battery also includes a first digital-to-analog converter, the first microcontroller is electrically connected to the target load through the first digital-to-analog converter, the first digital-to-analog converter is used to receive the predetermined voltage, and convert the predetermined voltage into a first analog voltage and send it to the target load. When the first microcontroller includes the first digital-to-analog conversion module, the emulator of the lithium battery also includes a first analog-to-digital converter, the first microcontroller is electrically connected to the current detection device and the voltage detection device respectively through the first analog-to-digital converter, the first analog-to-digital converter is used to receive the current data and the voltage data, and convert the current data and the voltage data into fourth digital data and send them to the first microcontroller. Since the above-mentioned target load can only receive analog voltage signals, when the above-mentioned first microcontroller has only an analog-to-digital conversion function, the digital signal emitted by the above-mentioned first microcontroller is converted into an analog signal through the above-mentioned first digital-to-analog converter; since the above-mentioned current data and the above-mentioned voltage data are both analog signals, when the above-mentioned first microcontroller has only a digital-to-analog conversion function, the above-mentioned current and voltage data are converted into digital signals through the above-mentioned first analog-to-digital converter, thereby further realizing the simulation of lithium battery powering the above-mentioned target load, and further facilitating the experiment of the response of the above-mentioned target load under different lithium battery conditions.

[0039] According to another specific embodiment of the present application, the lithium battery simulator further includes a voltage stabilizer, and the first digital-to-analog converter is electrically connected to the target load via the voltage stabilizer. The voltage stabilizer can stabilize the first analog voltage output by the first digital-to-analog converter within a predetermined range, thereby automatically adjusting the balance of the voltage output to the target load, thereby ensuring a better power supply effect for the target load.

[0040] In a specific embodiment, the above-mentioned voltage regulator is an adjustable linear voltage regulator IC. When the above-mentioned first analog voltage changes, the above-mentioned control circuit adjusts the voltage regulator IC to generate a simulated battery voltage through the above-mentioned second digital-to-analog converter, and the voltage range is from 1.0V to 4.2V, so as to ensure the stability of the above-mentioned first analog voltage.

[0041] According to another specific embodiment of the present application, the above current data and the above voltage data are both analog signals, the above control device includes a second microcontroller, the above second microcontroller includes a second analog-to-digital conversion module and a second digital-to-analog conversion module, the above second microcontroller is also used to convert the above voltage data and the above current data into corresponding second digital data through the above second analog-to-digital conversion module and send them to the above battery simulator, the above second microcontroller is also used to convert the above predetermined voltage into a second analog voltage through the above second digital-to-analog conversion module and send it to the above target load. Selecting a microcontroller with analog-to-digital conversion function and digital-to-analog conversion function can reduce external digital-to-analog converters and analog-to-digital converters, thereby further realizing the miniaturization of the simulator.

[0042] In one embodiment, when the second microcontroller includes the second analog-to-digital conversion module and the second digital-to-analog conversion module, one end of the voltage regulator can be directly electrically connected to the second microcontroller, and the other end of the voltage regulator is electrically connected to the target load.

[0043] Of course, in the actual application process, those skilled in the art can also select a microcontroller without analog-to-digital conversion function and digital-to-analog conversion function as the above-mentioned control device. In this case, in order to further realize the simulation of the discharge characteristics of the lithium battery, in another specific embodiment of the present application, the above-mentioned current data and the above-mentioned voltage data are both analog signals, and the above-mentioned predetermined voltage is a digital signal, such as Figure 4 As shown, the emulator of the lithium battery mentioned above also includes a second digital-to-analog converter 60 and a first analog-to-digital converter 80, wherein the control device 30 is electrically connected to the target load 50 through the second digital-to-analog converter 60, and the second digital-to-analog converter 60 is used to convert the predetermined voltage into a third analog voltage and send it to the target load 50; the first analog-to-digital converter 80 is electrically connected to the current detection device 10, the voltage detection device 20 and the control device 30, respectively, and the first analog-to-digital converter 80 is used to convert the current data and the voltage data into third digital data and send them to the control device 30, respectively.

[0044] In the above embodiment, the control device includes a microcontroller, and the microcontroller controls the second digital-to-analog converter via a three-wire serial peripheral interface (SPI). Of course, the connection method between the microcontroller and the second digital-to-analog converter is not limited to the above method.

[0045] In addition, in order to further ensure that the simulator has a better power supply effect on the target load, in the above embodiment, Figure 4 As shown, the lithium battery simulator further includes a voltage regulator 70 , and the second digital-to-analog converter 60 is electrically connected to the target load 50 via the voltage regulator 70 .

[0046] Specifically, the current detection device includes a current sensor and a second analog-to-digital converter, wherein the current sensor is used to be electrically connected to the target load, and the current sensor is used to detect analog current data in real time; the second analog-to-digital converter is electrically connected to the current sensor and the control device, respectively, and the second analog-to-digital converter is used to convert the analog current data into digital current data. In this way, there is no need for an external analog-to-digital converter or for the analog-to-digital converter to be built into the control device, further ensuring the flexibility of the simulator.

[0047] Specifically, the voltage detection device includes a voltage sensor and a third analog-to-digital converter, wherein the voltage sensor is electrically connected to the target load and is used to detect analog voltage data in real time; the third analog-to-digital converter is electrically connected to the voltage sensor and the control device, respectively, and is used to convert the analog voltage data into the voltage data. In this way, there is no need for an external analog-to-digital converter or for the analog-to-digital converter to be built into the control device, further ensuring the flexibility of the simulator.

[0048] According to another specific embodiment of the present application, the above-mentioned digital-to-analog converter can be a 10-bit digital-to-analog converter, and the above-mentioned voltage regulator can be an adjustable linear voltage regulator, the output voltage range of the voltage regulator is 1.0V to 4.5V, and the maximum rated current is 800mA. Of course, the above-mentioned digital-to-analog converter is not limited to the above-mentioned digital-to-analog converter, and the above-mentioned voltage regulator is not limited to the adjustable linear voltage regulator. Those skilled in the art can select any suitable digital-to-analog converter and voltage regulator. In addition, the working parameters of the voltage regulator are not limited to the above-mentioned parameters.

[0049] In another specific embodiment, the battery simulator can be installed in a terminal such as a PC or a computer. The microcontroller has a FLASH memory, which can be a 256K character FLASH memory. The microcontroller is responsible for the configuration control of the entire simulator. Its bandwidth can be set to 2.5Mpbs, and its operating frequency can be 20MHz. The microcontroller has built-in ADCs and UART serial interfaces, and the firmware program resides in its built-in FLASH memory. In addition, the network control interface of the microcontroller uses an Ethernet control chip (Ethernet PHY) to communicate with the terminal where the battery simulator is located. The microcontroller acts as the executor of the command through the Ethernet control chip.

[0050] In actual application, the battery simulator includes a DualFoil model. The DualFoil model is constructed using the DualFoil simulation software. The DualFoil simulation software is the most accurate and free battery simulation program. The DualFoil simulation software is an electrochemical battery model (Electro-chemical model) established by Dr. John Newman of the UC Berkeley Chemical Institute. It uses concentrated electrolyte theory (Concentrated Electrolyte Theory) and porous electrode theory (Porous Electrode Theory), using mathematical models and computer (PC) simulation methods, adding more than 60 parameters to the current and time parameters, and solving partial differential equations with computer programming language.

[0051] In order to achieve the purpose of instant and correct data flow exchange between the control device and the terminal where the battery simulator is located, both parties must follow a standard communication protocol. When the system is started, the terminal first sends a command to the control device to set its timer resolution and simulation cycle, and also transmits an initial voltage value, and then starts the battery simulator to simulate the lithium battery in the open loop state. At this time, the control device receives the initial voltage and adds it to the corresponding connection line, and then measures the current and voltage data of the load during each timer interrupt. After the first simulation cycle, the terminal completes the simulation, sends the simulated voltage value to the control device and reads the current and voltage values ​​recently obtained by the control device. The terminal continues to calculate the simulated load voltage, while the control device continues to obtain the current and voltage data at each timer, and the next simulation step repeats this process and continues.

[0052] According to another typical embodiment of the present application, a lithium battery simulation system is further provided. The lithium battery simulation system includes a load and any one of the lithium battery simulators described above.

[0053] The above-mentioned lithium battery simulation system includes a load and any one of the above-mentioned lithium battery simulators. The above-mentioned simulator can simulate the lithium battery discharge process, so there is no need to use a real lithium battery for discharge, thereby realizing the simulation of the lithium battery. It is more convenient to study the response of the above-mentioned target load under different lithium battery conditions, and since there is no need to use a real lithium battery, it is more environmentally friendly.

[0054] In actual application, the load includes an LED array, and the LED array can simulate load devices with different working parameters by lighting up different numbers of LEDs.

[0055] In order to verify the accuracy of the above-mentioned lithium battery simulator of the present application, the present application records the output voltage data of the lithium battery when it is actually working, and compares it with the voltage data output by the above-mentioned simulator of the present application, as follows: Under a load current of 400mA, the initial fully charged lithium battery voltage is set to 4.2V, and after connecting a 400mA load, it starts to discharge, and the voltage gradually decreases slowly, such as Figure 5 As shown, curve 300 is the actual lithium battery discharge curve, and curve 400 is the discharge curve of the lithium battery simulator. The two curves basically overlap, indicating that the output voltage curve of the simulator of the present application is basically consistent with the actual lithium battery voltage curve characteristics.

[0056] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0057] 1) In the above-mentioned lithium battery simulator of the present application, the above-mentioned current detection device obtains the current data of the target load in real time, and the voltage detection device obtains the voltage data of the target load in real time. The voltage data represents the current supply voltage of the lithium battery. The above-mentioned control device receives the above-mentioned voltage data and the above-mentioned current data and sends them to the battery simulator, so that the above-mentioned battery simulator simulates the lithium battery to output predetermined data to the above-mentioned control device according to the above-mentioned voltage data and the above-mentioned current data, so that the above-mentioned control device provides the predetermined voltage corresponding to the above-mentioned predetermined data to the above-mentioned target load to simulate the output state and discharge characteristics of the real lithium battery. The above-mentioned lithium battery simulator of the present application can simulate the discharge process of the lithium battery, so that there is no need to use a real lithium battery for discharge, and the simulation of the lithium battery is realized. It can be more convenient to study the response of the above-mentioned target load under different lithium battery conditions, and because there is no need to use a real lithium battery, it is more environmentally friendly.

[0058] 2) The above-mentioned lithium battery simulation system of the present application includes a load and any one of the above-mentioned lithium battery simulators. The above-mentioned simulator can simulate the discharge process of the lithium battery. In this way, there is no need to use a real lithium battery for discharge, thereby realizing the simulation of the lithium battery. It is convenient to study the response of the above-mentioned target load under different lithium battery conditions, and since there is no need to use a real lithium battery, it is more environmentally friendly.

[0059] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lithium battery simulator, characterized in that: include: A current detection device, used to be electrically connected to a target load, and the current detection device is used to detect current data of the target load in real time; A voltage detection device, used to be electrically connected to the target load, and the voltage detection device is used to detect voltage data of the target load in real time; a control device, electrically connected to the current detection device and the voltage detection device respectively, the control device being used to receive the current data and the voltage data, and the control device being also electrically connected to the target load; A battery simulator is communicatively connected to the control device, and is used to receive the current data and the voltage data sent by the control device, and output predetermined data according to the current data and the voltage data and send it to the control device, so that the control device provides the target load with a predetermined voltage corresponding to the predetermined data, wherein the predetermined data is the voltage data output by the battery simulator simulating the lithium battery, The lithium battery equivalent circuit includes a voltage source and a first resistor, and the open-loop circuit voltage of the voltage source is V oc , the resistance of the first resistor is R i , satisfying the formula V b =V oc -I×R i , I is the current data, V b The battery simulator calculates V according to the voltage data and the current data. oc and R i , and the calculated V oc and R i The voltage source and the first resistor are assigned values ​​so that the control device outputs the predetermined voltage.

2. The lithium battery simulator according to claim 1, characterized in that: The current data and the voltage data are both analog signals, and the control device includes: A first microcontroller includes a first analog-to-digital conversion module or a first digital-to-analog conversion module. The first microcontroller is electrically connected to the current detection device and the voltage detection device respectively. The first microcontroller is also used to convert the current data and the voltage data into corresponding first digital data through the first analog-to-digital conversion module and send them to the battery simulator, or the first microcontroller is also used to receive the predetermined voltage through the first digital-to-analog conversion module, and convert the predetermined voltage into a first analog voltage and send it to the target load.

3. The lithium battery simulator according to claim 2, characterized in that: In the case where the first microcontroller includes the first analog-to-digital conversion module and the predetermined voltage is a digital signal, the lithium battery emulator further includes: a first digital-to-analog converter, wherein the first microcontroller is electrically connected to the target load via the first digital-to-analog converter, and the first digital-to-analog converter is used to receive the predetermined voltage, convert the predetermined voltage into a first analog voltage, and then send the first analog voltage to the target load; In the case where the first microcontroller includes the first digital-to-analog conversion module, the lithium battery simulator further includes: A first analog-to-digital converter, wherein the first microcontroller is electrically connected to the current detection device and the voltage detection device respectively through the first analog-to-digital converter, and the first analog-to-digital converter is used to receive the current data and the voltage data, and convert the current data and the voltage data into fourth digital data respectively and send them to the first microcontroller.

4. The lithium battery simulator according to claim 3, characterized in that: The lithium battery simulator also includes: A voltage regulator, wherein the first digital-to-analog converter is electrically connected to the target load through the voltage regulator.

5. The lithium battery simulator according to claim 1, characterized in that: The current data and the voltage data are both analog signals, and the control device includes: The second microcontroller includes a second analog-to-digital conversion module and a second digital-to-analog conversion module. The second microcontroller is also used to convert the voltage data and the current data into corresponding second digital data through the second analog-to-digital conversion module and send them to the battery simulator. The second microcontroller is also used to convert the predetermined voltage into a second analog voltage through the second digital-to-analog conversion module and send it to the target load.

6. The lithium battery simulator according to claim 1, characterized in that: The current data and the voltage data are both analog signals, the predetermined voltage is a digital signal, and the lithium battery simulator further includes: a second digital-to-analog converter, wherein the control device is electrically connected to the target load via the second digital-to-analog converter, and the second digital-to-analog converter is used to convert the predetermined voltage into a third analog voltage and then send the converted voltage to the target load; The first analog-to-digital converter is electrically connected to the current detection device, the voltage detection device and the control device respectively, and is used to convert the current data and the voltage data into third digital data respectively and send the third digital data to the control device.

7. The lithium battery simulator according to claim 1, characterized in that: The current detection device comprises: A current sensor, used to be electrically connected to the target load, and the current sensor is used to detect analog current data in real time; The second analog-to-digital converter is electrically connected to the current sensor and the control device respectively, and is used for converting the analog current data into digital current data.

8. The lithium battery simulator according to claim 1, characterized in that: The voltage detection device comprises: A voltage sensor, used to be electrically connected to the target load, and the voltage sensor is used to detect analog voltage data in real time; A third analog-to-digital converter is electrically connected to the voltage sensor and the control device respectively, and the third analog-to-digital converter is used to convert the analog voltage data into the voltage data.

9. The lithium battery simulator according to any one of claims 1 to 8, characterized in that: The battery simulator includes a DualFoil model.

10. A lithium battery simulation system, characterized in that: include: load; A lithium battery simulator as claimed in any one of claims 1 to 9.

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