CN114977454A - Universal dummy battery and use method thereof - Google Patents

Universal dummy battery and use method thereof Download PDF

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Publication number
CN114977454A
CN114977454A CN202210458452.9A CN202210458452A CN114977454A CN 114977454 A CN114977454 A CN 114977454A CN 202210458452 A CN202210458452 A CN 202210458452A CN 114977454 A CN114977454 A CN 114977454A
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CN
China
Prior art keywords
resistance value
power supply
adjustable potentiometer
processing unit
central processing
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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CN202210458452.9A
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Chinese (zh)
Inventor
鲁维
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Guangdong Yinuo Communication Co Ltd
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Guangdong Yinuo Communication Co Ltd
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Priority to CN202210458452.9A priority Critical patent/CN114977454A/en
Publication of CN114977454A publication Critical patent/CN114977454A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/24—Arrangements for testing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Power Sources (AREA)

Abstract

The invention relates to a universal dummy battery, comprising: the device comprises a central processing unit, an MOS (metal oxide semiconductor) tube, an adjustable potentiometer, a pull-up resistor and an LCD (liquid crystal display) screen, wherein the adjustable potentiometer is used for changing a resistance value according to user adjustment; the central processing unit comprises a first ADC, an SPI interface and a conduction signal output interface, the SPI interface is connected with the LCD display screen, the conduction signal output interface is connected with a grid electrode of an MOS (metal oxide semiconductor) tube, a source electrode of the MOS tube is connected with a pull-up resistor, and a drain electrode of the MOS tube is connected with the adjustable potentiometer; the first ADC is used for collecting voltage data in real time; the central processing unit obtains power supply voltage from external equipment, is used for receiving instructions sent by the external equipment to control the conduction of the MOS tube, obtains voltage data from the first ADC in real time, calculates the resistance value of the adjustable potentiometer and displays the resistance value on the LCD display screen. The resistance value of the adjustable potentiometer is obtained and displayed until the resistance value is adjusted to be recognized, the adjusting range is large and continuous, the universality is strong, convenience and rapidness are realized, and the change of the resistance value can be seen at any time.

Description

Universal dummy battery and use method thereof
Technical Field
The invention relates to the technical field of electronic equipment testing, in particular to a universal dummy battery and a power supply method thereof.
Background
The dummy battery is a necessary device for mobile phone test, and plays a very important role in project debugging. At present, false electricity for mobile phone project test is manufactured by battery manufacturers, when a plurality of battery suppliers exist, resources need to be coordinated to each manufacturer, the process is complicated, the timeliness is poor, and false batteries cannot be used universally among projects. Designing a universal dummy battery can save a lot of time for enterprise research and development.
The existing scheme utilizes a switch to switch a plurality of paths of ID identification resistors, has limited adjustability, weak universality and single battery interface, does not have universality structurally, is not adaptive in circuit design, does not support real-time display of ID, Vout and Iout information, and is not convenient for research and development personnel to debug and use.
Disclosure of Invention
Based on the above, the invention provides a universal dummy battery and a using method thereof, which can adjust the resistance value to a preset identification resistance value by acquiring and displaying the resistance value of an adjustable potentiometer in real time. The general false battery has the advantages that the adjustment range is large and continuous, the universality is high, a technician can use the general false battery more conveniently and quickly, and the change of the resistance value can be seen at any time.
According to a first aspect of some embodiments of the present application, there is provided a universal dummy battery comprising:
the device comprises a central processing unit, an MOS (metal oxide semiconductor) tube, an adjustable potentiometer, a pull-up resistor and an LCD (liquid crystal display) screen, wherein the adjustable potentiometer is used for changing a resistance value according to user adjustment;
the central processing unit comprises a first ADC, an SPI interface and a conducting signal output interface, the SPI interface is connected with the LCD display screen, the conducting signal output interface is connected with a grid electrode of the MOS tube, a source electrode of the MOS tube is connected with the pull-up resistor, and a drain electrode of the MOS tube is connected with the adjustable potentiometer;
the first ADC is used for collecting voltage data between the adjustable potentiometer and the pull-up resistor in real time when the MOS tube is conducted;
the central processing unit obtains power supply voltage from external equipment, is used for receiving an instruction sent by the external equipment to control the conduction of the MOS tube, obtains voltage data from the first ADC in real time, calculates the resistance value of the adjustable potentiometer, and displays the resistance value on the LCD display screen.
Further, the central processing unit is further configured to control the MOS transistor to be turned off when the resistance value is consistent with a preset identification resistance value.
And further, the digital power supply is used for supplying power to the terminal after the resistance value of the adjustable potentiometer is consistent with the identification resistance value.
Further, the central processing unit further comprises a second ADC, and the second ADC is configured to acquire a power supply voltage of the digital power supply when the digital power supply supplies power to the terminal.
Further, the central processing unit further comprises a third ADC, and the third ADC is configured to collect a power supply current of the digital power supply when the digital power supply supplies power to the terminal.
Further, the CPU also comprises a protocol conversion chip and a USB interface, and the protocol conversion chip is connected with the USB interface and the serial interface;
the protocol conversion chip is used for acquiring an instruction sent by the external equipment from the USB interface;
the central processing unit is used for acquiring an input instruction of external equipment from the protocol conversion chip and transmitting the acquired power supply voltage and the acquired power supply current to the protocol conversion chip.
The USB interface is connected with the central processing unit, and the linear voltage stabilizer is used for supplying power to the central processing unit after reducing the voltage of the power supply of the USB interface.
The mobile phone further comprises a protection IC connected with the digital power supply, wherein the protection IC is used for protecting the mobile phone mainboard from overcharge, overdischarge and overcurrent when being connected with the mobile phone mainboard of the terminal.
According to a second aspect of some embodiments of the present application, there is provided a method for using a universal dummy cell, the universal dummy cell comprising a central processing unit, a MOS transistor, an adjustable potentiometer, a pull-up resistor, and an LCD display screen; the central processing unit comprises a first ADC, an SPI interface and a conduction signal output interface, the SPI interface is connected with the LCD display screen, the conduction signal output interface is connected with a grid electrode of the MOS tube, a source electrode of the MOS tube is connected with the pull-up resistor, and a drain electrode of the MOS tube is connected with the adjustable potentiometer, and the method comprises the following steps:
acquiring an external sending instruction, and controlling the MOS tube to be conducted according to the sending instruction;
controlling the first ADC to acquire voltage data between the adjustable potentiometer and the pull-up resistor in real time;
acquiring the voltage data, and calculating to obtain the resistance value of the adjustable potentiometer;
and displaying the resistance value on the LCD display screen.
Further, the method further comprises:
judging whether the resistance value is consistent with a preset identification resistance value or not;
if yes, the MOS tube is controlled to be cut off.
The resistance value of the adjustable potentiometer is obtained in real time and displayed until the resistance value is consistent with the identification resistance value of the terminal. The universal dummy battery with the adjustable potentiometer has the advantages of large and continuous resistance adjusting range and strong universality. And secondly, when the universal dummy battery is connected with a terminal for power supply, the power supply voltage and the power supply current of the dummy battery can be acquired and recorded in real time, so that technicians can conveniently check historical data during pressure testing. The universal false battery is strong in universality, convenient and fast, and the change of the resistance value can be seen at any time.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Drawings
FIG. 1 is a schematic diagram of a circuit module of a general dummy battery according to an embodiment of the present application;
fig. 2 is a flowchart illustrating steps of a method for using a universal dummy battery according to an embodiment of the present application.
Reference numerals: 100. a universal dummy cell; 110. a central processing unit; 111. a first ADC; 112. a conducting signal output interface; 113. an SPI interface; 114. a second ADC; 115. a third ADC; 116. a serial port interface; 120. an MOS tube; 130. an adjustable potentiometer; 140. a pull-up resistor; 150. an LCD display screen; 160. a digital power supply; 170. a protocol conversion chip; 180. a linear regulator; 190. the IC is protected.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims. In the description of the present application, it is to be understood that the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
A dummy cell is an electronic device that interfaces with a real cell, but does not have the capability to store and release electrical energy. Generally, when a true battery is inconvenient to test, for example, parameters such as voltage and current need to be adjusted during testing, or on occasions such as current and voltage needing to be constant for a long time, power supply equipment such as a controllable power supply is introduced through a false battery and then output to a corresponding test terminal to supply power to the test terminal.
Identifying the resistance: the corresponding battery ID (identification) is arranged on the batteries of different manufacturers, so that the batteries of different manufacturers cannot be used universally. In the existing battery identification technology, when a mobile terminal is powered on, the mobile terminal identifies a battery and then performs related processing, wherein if the battery is a legal battery, the mobile terminal is allowed to be powered on, otherwise, the mobile terminal is not allowed to be powered on, and the like. Since the range for a legal battery in the prior art is always fixed after the mobile terminal is shipped. The battery ID is also the corresponding battery ID resistance, the battery ID resistance is the resistance of the mobile phone for identifying the battery, the identification is carried out through different resistance values, if the battery ID resistance is wrong, the mobile phone can judge that the battery is invalid, and the mobile phone can not be started.
In conclusion, the false batteries for the mobile phone project test are all manufactured by battery manufacturers, when a plurality of battery suppliers exist, resources need to be coordinated with all the manufacturers, the process is complicated, the timeliness is poor, and the false batteries cannot be used universally among projects. To address the problems involved in the background. Referring to fig. 1, the present application provides a universal dummy battery 100, including:
the device comprises a central processing unit 110, a MOS tube 120, an adjustable potentiometer 130, a pull-up resistor 140 and an LCD display screen 150.
The adjustable potentiometer 130 is used to adjust the resistance value according to the user's needs. Embodied as adjusting the resistance value of the adjustable potentiometer 130 to the identification resistance value of the terminal to be detected.
The central processing unit 110 includes a first ADC111, an SPI interface 113 and a conduction signal output interface 112, the SPI interface 113 is connected to the LCD display screen 150, the conduction signal output interface 112 is connected to the gate of the MOS transistor 120, the source of the MOS transistor 120 is connected to the pull-up resistor 140, and the drain of the MOS transistor 120 is connected to the adjustable potentiometer 130.
The first ADC111 is configured to collect voltage data between the adjustable potentiometer 130 and the pull-up resistor 140 in real time when the MOS transistor 120 is turned on.
The central processing unit 110 obtains a power supply voltage from an external device, and is configured to receive an instruction sent from the outside to control the conduction of the MOS transistor 120, obtain voltage data from the first ADC111 in real time, calculate a resistance value of the adjustable potentiometer 130, and display the resistance value on the LCD display 150.
The central processing unit 110 may be an STM32 single chip microcomputer, the MOS transistor 120 is a P-type MOS transistor, the adjustable range of the adjustable potentiometer 130 is 100-1M Ω, and the pull-up resistor 140 is a 100K high-precision resistor.
In a specific application scenario, knowing the identification resistance value of the terminal, adjusting the adjustable potentiometer 130 changes its own resistance value, and the resistance of the adjustable potentiometer 130 changes with the adjustment action. After obtaining the power supply voltage from the external device, the cpu 110 receives the command sent from the external device, and controls the MOS transistor 120 to be turned on, and the resistor Rid of the adjustable potentiometer 130 and the pull-up resistor R140 form a voltage dividing circuit, where the pull-up resistor R140 is used to clamp the signal line with an indeterminate state to a high level through a resistor. The first ADC111 acquires voltage data between the resistor Rid and the pull-up resistor R140 in real time, and transmits the voltage data to the cpu 110. After the central processing unit 110 obtains the voltage data, the real-time resistance value of the adjustable potentiometer 130 is calculated. And displays the real-time resistance value through the LCD screen 150 so that the technician can more accurately adjust the adjustable potentiometer 130 according to the display of the LCD screen 150 until the LCD screen 150 displays the known identification resistance value.
In a specific embodiment, the cpu 110 is further configured to control the MOS transistor 120 to be turned off when the resistance value is consistent with a preset identification resistance value.
After the resistance value of the adjustable potentiometer 130 is consistent with the identification resistance value, the terminal can be connected with the dummy battery without continuously obtaining the resistance of the adjustable potentiometer 130. At this time, the MOS transistor 120 is turned off, and the resistor Rid is disconnected from the pull-up resistor R140.
In a specific embodiment, the universal dummy battery 100 further comprises:
a digital power supply 160, wherein the digital power supply 160 is configured to supply power to the terminal after the resistance value of the adjustable potentiometer 130 is consistent with the identification resistance value. The digital power supply 160 can stably and continuously supply power to the terminal, and the supply voltage thereof is 2-5V.
In a preferred embodiment:
the central processing unit 110 further comprises a second ADC114, wherein the second ADC114 is configured to collect a supply voltage of the digital power supply 160 when the digital power supply 160 supplies power to the terminal. The central processing unit 110 further comprises a third ADC115, wherein the third ADC115 is configured to collect a supply current of the digital power supply 160 when the digital power supply 160 supplies power to the terminal.
In order to ensure the stability of the power supply to the terminal, the power supply voltage and the power supply current need to be monitored and recorded in real time, which can help technicians to trace in the follow-up problem inspection.
In a preferred embodiment, the universal dummy battery 100 further includes:
the central processing unit 110 further includes a serial interface 116, and the protocol conversion chip 170 is connected to the USB interface and the serial interface 116. The protocol conversion chip is used for acquiring the instruction sent by the external equipment from the USB interface. The central processor 110 is configured to obtain an input instruction from the protocol conversion chip 170, and transmit the collected power supply voltage and the collected power supply current to the protocol conversion chip 170.
The protocol conversion chip 170 is a protocol chip for converting UART to USB, and may specifically be an FT232 chip. The protocol conversion chip 170 sends the instruction of turning off or turning on the MOS transistor 120 sent by the upper computer to the central processing unit 110 through the USB interface, so that the central processing unit 110 controls the turning off or turning on of the MOS transistor 120 according to the received instruction. The protocol conversion chip 170 can also obtain the voltage and current data collected by the cpu 110 through the serial interface 116, and transmit and print the data information to the serial tool of the computer. When the stress test is required, the history data of the general-purpose dummy battery 100 can be visually checked.
In a preferred embodiment, the universal dummy battery 100 further includes:
and the linear voltage stabilizer 180 is connected with the USB interface and the central processing unit 110, and the linear voltage stabilizer 180 is used for supplying power to the central processing unit 110 after the voltage of the power supply of the USB interface is reduced. In the embodiment of the present application, the linear regulator 180 is used to step down the output voltage from 5V to 3.3V for powering the cpu 110, the LCD panel 150 and the protocol conversion chip 170.
The linear regulator 180 is used to supply power to the cpu 110 when the resistance Rid of the adjustable potentiometer 130 has not been adjusted to a predetermined identification resistance value. In a specific application scenario, the linear regulator 180 is used for adjusting the adjustable potentiometer 130, and may or may not be used when the universal dummy battery 100 is connected to a terminal for power supply.
In a preferred embodiment, the universal dummy battery 100 further includes a protection IC190, which is connected to the digital power supply 160, and the protection IC190 is used for protecting the mobile phone motherboard from overcharge, overdischarge, and overcurrent when being connected to the mobile phone motherboard of the terminal.
Corresponding to the general false battery, the application also provides a using method of the general false battery, and the general false battery comprises a central processing unit, an MOS tube, an adjustable potentiometer, a pull-up resistor and an LCD display screen; the central processing unit includes a first ADC, an SPI interface, and a conduction signal output interface, the SPI interface is connected to the LCD display screen, the conduction signal output interface is connected to a gate of the MOS transistor, a source of the MOS transistor is connected to the pull-up resistor, and a drain of the MOS transistor is connected to the adjustable potentiometer, referring to fig. 2, the method includes:
step S1: acquiring an external sending instruction, and controlling the MOS tube to be conducted according to the sending instruction;
step S2: controlling the first ADC to acquire voltage data between the adjustable potentiometer and the pull-up resistor in real time;
step S3: acquiring the voltage data, and calculating to obtain the resistance value of the adjustable potentiometer;
step S4: and displaying the resistance value on the LCD display screen.
In a preferred embodiment, the method further comprises:
step S5: and judging whether the resistance value is consistent with a preset identification resistance value or not.
Step S6: if yes, the MOS tube is controlled to be cut off.
The preset identification resistance value is the identification resistance value of the terminal to be detected. Different terminals and different identification resistors are used, and the false battery is used without changing a power supply circuit and only by adjusting the resistance value of the adjustable potentiometer according to the identified resistance value.
The resistance value of the adjustable potentiometer is obtained in real time and displayed until the resistance value is consistent with the identification resistance value of the terminal. The universal dummy battery with the adjustable potentiometer has the advantages of large and continuous resistance adjusting range and strong universality. And secondly, when the universal dummy battery is connected with a terminal for power supply, the power supply voltage and the power supply current of the dummy battery can be acquired and recorded in real time, so that technicians can conveniently check historical data during pressure testing. The universal false battery is strong in universality, convenient and fast, and the change of the resistance value can be seen at any time.
It is to be understood that the embodiments of the present application are not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the following claims. The above-mentioned embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the concept of the embodiments of the present application, and these embodiments are within the scope of the present application.

Claims (10)

1. A universal dummy battery applied to a terminal, comprising:
the device comprises a central processing unit, an MOS (metal oxide semiconductor) tube, an adjustable potentiometer, a pull-up resistor and an LCD (liquid crystal display) screen, wherein the adjustable potentiometer is used for changing a resistance value according to user adjustment;
the central processing unit comprises a first ADC, an SPI interface and a conducting signal output interface, the SPI interface is connected with the LCD display screen, the conducting signal output interface is connected with a grid electrode of the MOS tube, a source electrode of the MOS tube is connected with the pull-up resistor, and a drain electrode of the MOS tube is connected with the adjustable potentiometer;
the first ADC is used for collecting voltage data between the adjustable potentiometer and the pull-up resistor in real time when the MOS tube is conducted;
the central processing unit obtains power supply voltage from external equipment, is used for receiving an instruction sent by the external equipment to control the conduction of the MOS tube, obtains voltage data from the first ADC in real time, calculates the resistance value of the adjustable potentiometer, and displays the resistance value on the LCD display screen.
2. The universal dummy battery according to claim 1, wherein:
the central processing unit is also used for controlling the MOS tube to be cut off when the resistance value is consistent with a preset identification resistance value.
3. The universal dummy battery according to claim 1, further comprising:
and the digital power supply is used for supplying power to the terminal after the resistance value of the adjustable potentiometer is consistent with the identification resistance value.
4. The universal dummy battery according to claim 1, wherein:
the central processing unit further comprises a second ADC, and the second ADC is used for collecting the power supply voltage of the digital power supply when the digital power supply supplies power to the terminal.
5. The universal dummy battery according to claim 4, wherein:
the central processing unit further comprises a third ADC, and the third ADC is used for collecting the power supply current of the digital power supply when the digital power supply supplies power to the terminal.
6. The universal dummy battery according to claim 5, wherein:
the CPU also comprises a protocol conversion chip and a USB interface, and the protocol conversion chip is connected with the USB interface and the serial interface;
the protocol conversion chip is used for acquiring an instruction sent by the external equipment from the USB interface;
the central processing unit is used for acquiring an input instruction of an external device from the protocol conversion chip and transmitting the acquired power supply voltage and the acquired power supply current to the protocol conversion chip.
7. The universal dummy battery according to claim 1, wherein:
the linear voltage stabilizer is used for reducing the voltage of the power supply of the USB interface and supplying power to the central processing unit.
8. A universal dummy battery according to claim 1, wherein:
the mobile phone further comprises a protection IC connected with the digital power supply, and the protection IC is used for protecting overcharge, overdischarge and overcurrent of the mobile phone mainboard when the protection IC is connected with the mobile phone mainboard of the terminal.
9. The using method of the universal false battery is characterized in that the universal false battery comprises a central processing unit, an MOS tube, an adjustable potentiometer, a pull-up resistor and an LCD display screen; the central processing unit comprises a first ADC, an SPI interface and a conduction signal output interface, the SPI interface is connected with the LCD display screen, the conduction signal output interface is connected with a grid electrode of the MOS tube, a source electrode of the MOS tube is connected with the pull-up resistor, and a drain electrode of the MOS tube is connected with the adjustable potentiometer, and the method comprises the following steps:
acquiring an external sending instruction, and controlling the MOS tube to be conducted according to the sending instruction;
controlling the first ADC to acquire voltage data between the adjustable potentiometer and the pull-up resistor in real time;
acquiring the voltage data, and calculating to obtain the resistance value of the adjustable potentiometer;
and displaying the resistance value on the LCD display screen.
10. The method for using a universal dummy battery as claimed in claim 8, further comprising:
judging whether the resistance value is consistent with a preset identification resistance value or not;
if yes, the MOS tube is controlled to be cut off.
CN202210458452.9A 2022-04-28 2022-04-28 Universal dummy battery and use method thereof Pending CN114977454A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210458452.9A CN114977454A (en) 2022-04-28 2022-04-28 Universal dummy battery and use method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210458452.9A CN114977454A (en) 2022-04-28 2022-04-28 Universal dummy battery and use method thereof

Publications (1)

Publication Number Publication Date
CN114977454A true CN114977454A (en) 2022-08-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210458452.9A Pending CN114977454A (en) 2022-04-28 2022-04-28 Universal dummy battery and use method thereof

Country Status (1)

Country Link
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