CN217769581U

CN217769581U - General false battery

Info

Publication number: CN217769581U
Application number: CN202221015090.8U
Authority: CN
Inventors: 鲁维
Original assignee: Guangdong Yinuo Communication Co Ltd
Current assignee: Guangdong Yinuo Communication Co Ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-11-08
Anticipated expiration: 2032-04-28

Abstract

The utility model relates to a false battery of general type, include: the device comprises a central processing unit, an MOS tube, an adjustable potentiometer, a pull-up resistor, an LCD display screen and a USB interface; the input end of the USB interface is connected with an external power supply, and the output end of the USB interface is connected with the central processing unit; the central processing unit comprises a conducting signal output interface (SPI) interface and a first ADC (analog to digital converter) used for acquiring voltage data, 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, a drain electrode of the MOS tube is connected with the adjustable potentiometer, and the SPI interface is connected with the LCD display screen; the first ADC is connected with a source electrode of the MOS tube and used for collecting voltage data between the adjustable potentiometer and the pull-up resistor. 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

General type dummy battery

Technical Field

The utility model relates to a technical field of electronic equipment test especially relates to a false battery of general type.

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.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a false battery of general type, the resistance value and the demonstration through acquireing adjustable potentiometer in real time, until adjusting this resistance value to predetermined discernment resistance value. 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 some embodiments of the present application, there is provided a universal dummy battery including:

the device comprises a central processing unit, an MOS (metal oxide semiconductor) tube, an adjustable potentiometer, a pull-up resistor, an LCD (liquid crystal display) screen and a USB (universal serial bus) interface;

the input end of the USB interface is connected with an external power supply, and the output end of the USB interface is connected with the central processing unit;

the first ADC is connected with a source electrode of the MOS tube and is used for collecting voltage data between the adjustable potentiometer and the pull-up resistor;

the central processing unit comprises a conduction signal output interface SPI interface and a first ADC used for acquiring voltage data, 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 the pull-up resistor, a drain electrode of the MOS tube is connected with the adjustable potentiometer, and the SPI interface is connected with the LCD display screen.

Further, still include:

and the digital power supply is connected with the adjustable potentiometer and the terminal.

Further, the central processing unit further comprises a second ADC, and the second ADC is connected to the positive electrode of the digital power supply and is used for collecting the power supply voltage of the digital power supply.

Further, the central processing unit further comprises a third ADC, wherein the negative electrode of the digital power supply of the third ADC is connected and used for collecting the power supply current of the digital power supply.

The USB interface is connected with the input end of the linear voltage stabilizer, and the output end of the linear voltage stabilizer is connected with the central processing unit.

The digital power supply further comprises a protection IC, wherein the input end of the protection IC is connected with the positive pole of the digital power supply, and the output end of the protection IC is connected with the negative pole of the digital power supply.

Furthermore, the digital power supply also comprises an NTC resistor, wherein the input end of the NTC resistor is connected with the anode of the digital power supply, and the output end of the NTC resistor is connected with the cathode of the digital power supply.

Further, the central processing unit is an STM32 single chip microcomputer;

the MOS tube is a PMOS tube;

furthermore, the adjustable range of the adjustable potentiometer is 100-1 MOmega;

the pull-up resistor is a high-precision resistor of 100K.

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 false 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 general false battery has the advantages of strong universality, convenience and rapidness, 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 universal dummy battery according to an embodiment of the present disclosure.

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

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 some 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 implementations described in the following exemplary examples do not represent all implementations 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 the case may be.

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 object, indicating that there may be three relationships, for example, a and/or B, which may indicate: 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 need to be constant for a long time, power supply equipment such as a controllable power supply is led in through a false battery and then output to a corresponding test terminal to supply power to the test terminal.

Identifying the resistance: batteries of different manufacturers are provided with corresponding battery IDs (identifications), 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, for example, 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. 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, an LCD display screen 150 and a USB interface.

The input end of the USB interface is connected to an external power source, and the output end of the USB interface is connected to the central processing unit 110. The central processing unit 110 includes a conducting signal output interface 112, an SPI interface 113 and a first ADC111, the conducting 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, the drain of the MOS transistor 120 is connected to the adjustable potentiometer 130, and the SPI interface 113 is connected to the LCD display 150. The first ADC111 is connected to the source of the MOS transistor 120, and is configured to collect voltage data between the adjustable potentiometer 130 and the pull-up resistor 140.

The central processing unit 110 is configured to receive an instruction sent from the outside to control the conduction of the MOS transistor 120, obtain the resistance value of the adjustable potentiometer 130 from the first ADC111 in real time, and display the resistance value on the LCD screen 150. The first ADC111 is configured to acquire a voltage value between the adjustable potentiometer 130 and the pull-up resistor 140 in real time when the MOS transistor 120 is turned on, and calculate a resistance value of the adjustable potentiometer 130 according to the voltage value. The adjustable potentiometer 130 may adjust its own resistance according to the user's needs.

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 high-precision resistor of 100K.

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 division 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 acquiring the voltage data, the cpu 110 calculates a real-time resistance value of the adjustable potentiometer 130. And displays the real-time resistance value through the LCD screen 150 to enable a technician to more precisely adjust the adjustable potentiometer 130 according to the display of the LCD screen 150 until the LCD screen 150 displays a known identifying resistance value.

When the resistance value is consistent with the preset identification resistance value, the central processing unit 110 controls the MOS transistor 120 to be turned off. 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, the digital power supply 160 being connected to the adjustable potentiometer 130 and the terminal. After the resistance value of the adjustable potentiometer 130 is identical to the identification resistance value, power is supplied to the terminal. The digital power supply 160 can stably and continuously supply power to the terminal, and the supply voltage of the digital power supply is 2-5V.

In a preferred embodiment:

the central processing unit 110 further includes a second ADC114, the second ADC is connected to the positive electrode of the digital power supply 160, and the second ADC114 is configured to collect the power supply voltage of the digital power supply 160 when the digital power supply 160 supplies power to the terminal. The central processor 110 further comprises a third ADC115 connected to the negative pole of the digital power supply 160. 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, an input end of the protocol conversion chip 170 is connected to the USB interface, and an output end of the protocol conversion chip 170 is connected to the serial interface 116.

And the protocol conversion chip acquires the instruction sent by the external equipment from the USB interface. The central processor 110 obtains an input instruction from the protocol conversion chip 170, and transmits the collected power supply voltage and 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 for 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 comprises:

and the input end of the linear voltage stabilizer 180 is connected with the USB interface, and the output end of the linear voltage stabilizer 180 is connected with the central processing unit 110. The linear regulator 180 is used to step down the supply voltage of the USB interface and supply power to the central processing unit 110. In the embodiment of the present application, the linear regulator 180 steps 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 comprises a protection IC190, an input terminal of the protection IC190 is connected to the positive terminal of the digital power supply 160, and an output terminal of the protection IC190 is connected to the negative terminal of the digital power supply 160. The protection IC190 is used for protecting the mobile phone motherboard from overcharge, overdischarge, and overcurrent when connected with the mobile phone motherboard of the terminal.

In a preferred embodiment, the universal dummy battery 100 further comprises an NTC resistor, an input terminal of the NTC resistor being connected to a positive terminal of the digital power supply, and an output terminal of the NTC resistor being connected to a negative terminal of the digital power supply. The NTC is a temperature-sensitive resistor with a negative temperature coefficient, and the temperature of the terminal mainboard can be detected through the NTC resistor.

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 several implementation manners of the embodiments of the present application, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, without departing from the concept of the embodiments of the present application, several variations and modifications can be made, which all fall within the scope of the embodiments of the present application.

Claims

1. A universal dummy battery applied to a terminal, comprising:

the central processing unit comprises a conduction signal output interface, an SPI interface and a first ADC used for obtaining voltage data, the first ADC is connected with a source electrode of the MOS tube and used for collecting the voltage data between the adjustable potentiometer and the pull-up resistor, the conduction signal output interface is connected with a grid electrode of the MOS tube, the source electrode of the MOS tube is connected with the pull-up resistor, a drain electrode of the MOS tube is connected with the adjustable potentiometer, and the SPI interface is connected with the LCD display screen.

2. The universal dummy battery according to claim 1, further comprising:

3. A universal dummy battery as claimed in claim 2, wherein:

the central processing unit further comprises a second ADC, and the second ADC is connected with the positive pole of the digital power supply and used for collecting the power supply voltage of the digital power supply.

4. A universal dummy battery as claimed in claim 2, wherein:

the central processing unit further comprises a third ADC, and the third ADC is connected with the negative electrode of the digital power supply and used for collecting the power supply current of the digital power supply.

5. A universal dummy battery according to claim 1, wherein:

the USB interface circuit further comprises a linear voltage stabilizer, wherein the input end of the linear voltage stabilizer is connected with the USB interface, and the output end of the linear voltage stabilizer is connected with the central processing unit.

6. A universal dummy battery as claimed in claim 2, wherein:

the protection IC is characterized by further comprising a protection IC, wherein the input end of the protection IC is connected with the positive pole of the digital power supply, and the output end of the protection IC is connected with the negative pole of the digital power supply.

7. A universal dummy battery as claimed in claim 2, wherein:

the digital power supply further comprises an NTC resistor, wherein the input end of the NTC resistor is connected with the positive electrode of the digital power supply, and the output end of the NTC resistor is connected with the negative electrode of the digital power supply.

8. The universal dummy battery according to claim 1, wherein:

the central processing unit is an STM32 single chip microcomputer;

the MOS tube is a PMOS tube.

9. The universal dummy battery according to claim 1, wherein:

the adjustable range of the adjustable potentiometer is 100-1 MOmega;

the pull-up resistor is a high-precision resistor of 100K.