CN215071711U

CN215071711U - Handheld yard POS of sweeping face two sections series connection battery charge-discharge device of sweeping

Info

Publication number: CN215071711U
Application number: CN202120967576.0U
Authority: CN
Inventors: 卢建旭; 李宗宇; 邱文庆; 丘春碧
Original assignee: Fujian Centerm Information Co Ltd
Current assignee: Fujian Centerm Information Co Ltd
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2021-12-07
Anticipated expiration: 2031-05-08

Abstract

The utility model provides a handheld yard POS two sections series battery charge and discharge devices of sweeping face includes: the battery comprises an AP module, a charge-discharge module, a fuel gauge module, a resistor NTC _1, a resistor NTC _2 and a double-battery series battery, wherein the AP module is respectively connected with the charge-discharge module and the fuel gauge module, and the charge-discharge module is connected with the fuel gauge module; the double-battery-in-series battery is respectively connected with a charge-discharge module and a fuel gauge module, the charge-discharge module is connected to the resistor NTC _2, the fuel gauge module is connected to the resistor NTC _1, the resistor NTC _2 is arranged on one side of the double-battery-in-series battery, and the resistor NTC _1 is arranged in the double-battery-in-series battery; through monitoring the battery temperature, calculate battery capacity in real time, promote the battery and detect the precision, improved the user and used the experience and feel.

Description

Handheld yard POS of sweeping face two sections series connection battery charge-discharge device of sweeping

Technical Field

The utility model relates to a handheld yard POS two sections series connection battery charge-discharge device of sweeping face.

Background

In the prior art, handheld intelligent face-brushing POS machine adopts single section battery power supply, and the voltage of single section battery is lower, and print in the POS machine and need use voltage more than 7V, often need give the printer power supply through stepping up, and battery supply current is great, leads to its consumption loss great, and this directly leads to the stand-by time not long, and battery voltage detects the condition such as inaccurate, and it is relatively poor to bring user experience.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is providing a handheld two sections series battery charge and discharge devices of sign indicating number POS of sweeping the face, adopt two sections series battery designs, and the battery power supply scope reaches between 6.5 ~ 8.7V, through monitoring battery temperature, calculates battery capacity in real time, promotes the battery and detects the precision, has improved the user and has used experience and feel.

The utility model discloses a realize like this: the utility model provides a two sections series connection battery charge-discharge device of handheld sign indicating number POS of sweeping face, includes: the battery comprises an AP module, a charge-discharge module, a fuel gauge module, a resistor NTC _1, a resistor NTC _2 and a double-battery series battery, wherein the AP module is respectively connected with the charge-discharge module and the fuel gauge module, and the charge-discharge module is connected with the fuel gauge module; the double-battery-in-series battery is respectively connected with the charge-discharge module and the electricity meter module, the charge-discharge module is connected to the resistor NTC _2, the electricity meter module is connected to the resistor NTC _1, the resistor NTC _2 is arranged on one side of the double-battery-in-series battery, and the resistor NTC _1 is arranged in the double-battery-in-series battery.

Further, the charging and discharging module comprises a charging chip, and the charging chip is respectively connected with the AP module, the electricity meter module, the resistor NTC _2 and the double batteries connected in series.

Further, the electricity meter module comprises an electricity meter chip, and the electricity meter chip is respectively connected with the AP module, the charge-discharge module, the resistor NTC _1 and the two batteries connected in series.

The utility model has the advantages of as follows: the utility model discloses a two sections series connection battery design, the battery power supply scope reaches between 6.5 ~ 8.7V, increase the design of coulomb meter module, real-time detection battery power, the coulomb meter module possesses oneself learning function, the accessible adopts big data monitoring battery charge-discharge number of times, charging voltage, through monitoring battery temperature, calculate battery capacity in real time, and record the battery capacity under the different temperatures, promote the battery and detect the precision, the coulomb meter passes through I2C signal with battery capacity, on send the AP module to, the AP module shows the display liquid crystal with battery capacity percentage, accurate reaction battery capacity, it feels to have improved user's use experience.

Drawings

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

Fig. 1 is a schematic block diagram of two batteries in series of a two-battery charging and discharging device of a handheld code-scanning and face-brushing POS;

FIG. 2 is a schematic view of a two-battery charging/discharging device of a handheld code-scanning face-brushing POS;

FIG. 3 is a first charging flow chart of the charging and discharging device for the two batteries connected in series of the hand-held code-scanning and face-brushing POS of the present invention;

FIG. 4 is a second flowchart illustrating the charging process of the two-battery charging/discharging device of the hand-held code-scanning and face-brushing POS;

fig. 5 illustrates a charging current setting method according to the present invention;

fig. 6 is a schematic circuit diagram of the fuel gauge module of the present invention;

fig. 7 is a schematic circuit diagram of the charge-discharge module of the present invention;

fig. 8 is a schematic view of J30 in the present invention;

FIG. 9 is a schematic diagram of a voltage-dividing circuit NTC _1 according to the present invention;

FIG. 10 is a schematic diagram of a voltage-dividing circuit NTC _2 according to the present invention;

fig. 11 is a schematic diagram of the voltage dividing circuit BAT _ ID of the present invention.

Detailed Description

The utility model discloses a two sections series connection battery design, the battery power supply scope reaches between 6.5 ~ 8.7V, increase the design of coulomb meter, real-time detection battery power, the coulomb meter possesses oneself learning function, the accessible adopts big data monitoring battery charge-discharge number of times, charging voltage, through monitoring battery temperature, calculate battery capacity in real time, and record the battery capacity under the different temperatures, promote the battery and detect the precision, the coulomb meter passes through I2C signal with battery capacity, on send to the AP module, the AP module shows the display liquid crystal with battery capacity percentage, accurate reaction battery capacity, it detects the precision to promote the battery, user experience is felt to have improved.

The utility model discloses when the battery charges, adopted battery temperature to detect, when ambient temperature is less than-10 degrees or the temperature is higher than 60 degrees and carries out the restriction of charging and do not charge, when the temperature was between-10 ~ 60 degrees, normally charge.

When the battery of the utility model discharges, the battery temperature detection is adopted, and when the temperature is lower than-10 ℃ and higher than 60 ℃, the discharging is forbidden; through charging, the management and control of discharging promotes battery life.

As shown in fig. 2, the utility model discloses a basic framework mode of AP module + chip that charges + two NTC + two section series batteries realizes charging, the management of discharging.

(1) As shown in fig. 1, the double-battery series connection design, the two single batteries are connected in series, and the voltage V + of the packaged battery is the sum of the voltage V1 of battery 1 and the voltage V2 of battery 2, so as to realize the voltage power supply capability of the product.

(2) The battery is internally provided with an NTC _1 resistor, the NTC _1 resistor is close to a circuit board of a battery signal interface end at the battery end, the NTC _1 resistor can sensitively reflect the change of the environmental temperature in the charging or discharging process of the battery interface end, and the temperature change accurately reflects the NTC _1 resistor. The NTC _1 resistance signal is connected to an ADC (analog to digital converter) of the electricity meter through a battery and an interface at the battery end of the mainboard, and the electricity meter monitors the resistance change of the NTC _1 in real time. And monitoring the environmental change of the battery.

(3) On the mainboard, the battery interface at the mainboard end is designed with NTC _2 resistor, which is arranged beside the battery interface, and the closer the more the better. The NTC _2 resistor is connected to a temperature detection ADC pin of the charge-discharge module through the wiring of the mainboard PCB, the charge-discharge module detects the resistance value change of the NTC _2 resistor in real time, and the environmental change of the battery end interface is monitored in real time.

(4) The battery built-in resistor NTC _1 and the mainboard battery interface design resistor NTC _2 use the same specification

(5) The main board is provided with a fuel gauge module which is arranged close to a battery port, the VCELL PIN of the fuel gauge samples the voltage of the battery, the voltage change of each charging or discharging process is tracked, the operation condition of the battery is tracked, the process voltage and time change data of full-charging to discharging and emptying of the battery are sampled and recorded in a storage area of the fuel gauge, and the charging and discharging curve management and updating of the battery are realized through the accumulated calculation of time, voltage, capacity data and no offset and the learning period of the battery from full to empty and from empty to full.

(6) The internal temperature of the battery is monitored when the resistor NTC _1 (with the bit number R1267) is adopted, the battery capacity at different temperatures is calculated by the fuel gauge according to battery charging and discharging data at different temperatures, and the available capacity of the battery is accurately calculated and fed back in the discharging process at different temperatures.

(7) The electricity meter accurately calculates the charging times of the battery, the charging times are stored in an electricity meter register, and the main control CPU reads the charging times of the electricity meter. The method is used for after-sale judgment of battery faults and the like.

(8) As shown in fig. 5, VCELL PIN of the fuel gauge samples battery voltage VBAT _ V +, divides the voltage by series battery VBAT _ V +, divides the voltage by resistors R1270(200K) and R1269(200K) with 1% precision, and outputs the voltage to the battery voltage detection VCELL PIN. The electricity meter records a charging curve and a discharging curve through real-time voltage detection. The CHG _ SDA and CHG _ SCL signals are connected with the AP module, and the AP module reads battery state information such as the calculated battery capacity and the charging times of the electricity meter through the serial port. When the fuel gauge detects the battery abnormality, the AP module can be informed of the battery abnormality through the INT interrupt signal. BAT _ ID of the fuel gauge is used for reading battery ID configuration, different battery manufacturers or different types of battery specifications are configured with different ID configurations, and different battery specifications are distinguished.

(9) As shown in fig. 5, in the charging current setting method, a TS pin of a charging and discharging module detects a voltage change of NTC _2, when the voltage of NTC _2 changes to a certain threshold, a TS register value of the charging and discharging module is triggered to change, the TS register value changes, the charging and discharging module generates an INT # interrupt pulse signal and outputs the INT # interrupt pulse signal to an AP module, the AP module reads the TS register value through I2C to obtain a peripheral environment temperature of a two-cell series battery, and determines a temperature, and according to a determined temperature condition, the AP module sets different charging current values for a charging current Ichg register of the charging and discharging module, so as to realize charging currents under different temperature conditions and a full charging voltage of the battery, and protect a service life of the battery.

As shown in fig. 3 and 7, the charge-discharge module (using the chip BQ25883) is connected to the NTC _2 resistor (the resistor R1197 in the figure) on the battery interface side of the main board of the terminal, and monitors the ambient temperature of the battery in real time, so as to perform charge control and battery discharge control, thereby prolonging the service life of the battery. CHG _ SDA, CHG _ SCL, CHG _ INT and CHG _ CE signals in the charge-discharge module are connected with the AP module, information of a charging process is fed back to the AP module, meanwhile, the AP module can set different battery charging currents for the charge-discharge module through the I2C signal, the charging currents of the battery are controlled, the charging currents under different temperature conditions are achieved, and when the temperature is too high or too low, the AP module can also set the charge-discharge module to stop charging through the I2C signal. Thereby protecting the battery and prolonging the service life of the battery.

(10) As shown in fig. 4, since the AP module can set the charging current and the charging switch to the charging and discharging module through I2C, the battery charging management under different environments can be managed more finely, for example, the battery charging management is implemented at-10 degrees to 0 degrees, the charging current is set to be smaller, at 0 degrees to 40 degrees, the charging current is set to be larger, and the charging current is set to be smaller, at 40 degrees to 60 degrees, so as to implement more usage scenarios and at the same time, protect the battery life to the maximum.

As shown in FIG. 7, Vchg is the charging head, and is similar to the single power supply that our mobile phone 220V converts into 5V/2A through the charging head

Vsys _ IN for the AP module, the fuel gauge module and the like, and the whole system is powered; when the device is connected with the electricity meter module, the device is connected with VCC _ SYS of the chip CW 2017;

vchg charges the battery through a VBAT + signal, and meanwhile, when the battery is not charged, the battery is discharged through the VBAT +;

during charging: vchg charges battery VBAT + while powering Sys-IN.

When the charging is not carried out, VBAT + is discharged, power is supplied to the SYS-IN through the conduction of BAT1\ BAT2 pins and SYS1\ SYS2 pins IN the charging and discharging module, and when the temperature exceeds the set discharge-forbidding temperature, the battery discharge-forbidding function is realized through the disconnection of BAT1\ BAT2 pins and SYS1\ SYS2 pins IN the charging and discharging module.

VREF, also known as a reference voltage, or reference comparison circuit, or reference voltage. It is as if the height of the object is indicated, always using sea level as a reference (called "altitude"), otherwise, it is impossible to determine the height; VCC _ SYS is the BQ25883 chip operating voltage; VBAT _ V + is the battery voltage; CHA _ STAT, which is connected with an indicator light and indicates the charging state; the charging management chip is connected with the detection pin meeting the requirements, and is connected to the AP module, and the AP module can judge whether the connected charging power supply is normal or not through the pin; CHA _ CE, the charging management chip enable pin, is connected to the AP module, and the charging management chip can be turned off through the pin without charging or discharging.

As shown in fig. 8, J30 is a socket for battery connection to the motherboard.

As shown in FIG. 9, the NTC _1 node, representing the voltage of the NTC _1 resistor, divides the reference voltage inside the fuel gauge by the NTC resistor (i.e., R1267) to obtain a voltage level signal of temperature change.

As shown in FIG. 10, the NTC _2 node, representing the voltage of the NTC _2 resistor, divides the VREF voltage by R1198 and the NTC resistor (i.e., R1197) to obtain a voltage level signal of temperature variation.

As shown in fig. 11, BAT _ ID, which represents the voltage of the ID identification signal of the battery, obtains a voltage level signal by dividing the VREF voltage by R1280, R1279.

Example one

As shown in fig. 2, the utility model relates to a handheld two sections series battery charge and discharge devices of sign indicating number POS of sweeping face, include: the battery comprises an AP module, a charge-discharge module, a fuel gauge module, a resistor NTC _1, a resistor NTC _2 and a double-battery series battery, wherein the AP module is respectively connected with the charge-discharge module and the fuel gauge module, and the charge-discharge module is connected with the fuel gauge module; the double-battery-in-series battery is respectively connected with the charge-discharge module and the electricity meter module, the charge-discharge module is connected to the resistor NTC _2, the electricity meter module is connected to the resistor NTC _1, the resistor NTC _2 is arranged on one side of the double-battery-in-series battery, and the resistor NTC _1 is arranged in the double-battery-in-series battery.

The charging and discharging module comprises a charging chip, and the charging chip is respectively connected with the AP module, the fuel gauge module, the resistor NTC _2 and the double batteries connected in series.

The electricity meter module comprises an electricity meter chip, and the electricity meter chip is respectively connected with the AP module, the charge-discharge module, the resistor NTC _1 and the double batteries connected in series.

The device comprises the following specific operation steps:

charging the two batteries in series: judging through the temperature acquired by the resistor NTC _2, and when the temperature is lower than a first limit temperature or higher than a second limit temperature, not charging, and when the temperature is higher than or equal to the first limit temperature and lower than the second limit temperature, charging;

discharging the double batteries in series: the temperature acquired by the resistor NTC _1 is used for judging, and when the temperature is lower than a third limit temperature or higher than a fourth limit temperature, discharging is forbidden; when the temperature is equal to or higher than the third limit temperature and equal to or lower than the fourth limit temperature, discharging is performed.

In a preferred embodiment, the charging of the two batteries connected in series is further specifically: the charge-discharge module acquires temperature through the resistor NTC _2, sends the acquired temperature to the AP module, and the AP module receives the temperature and judges: when the temperature is lower than a first limit temperature or higher than a second limit temperature, the AP module sends a non-charging signal to the charging and discharging module, and the charging and discharging module is powered off and stops charging after receiving the non-charging signal; and when the temperature is greater than or equal to the first limit temperature and less than a second limit temperature, the AP module sends a charging signal to continue charging.

In a preferred embodiment, the AP module sends the charging signal and the non-charging signal to the charging and discharging module by writing different values to the charging and discharging module in the form of I2C signals, where the different values correspond to different charging operations, different charging current values, and stopping the charging operation.

In a preferred embodiment, when the temperature is greater than or equal to the first limit temperature and less than or equal to the second limit temperature, the AP module sends a charging signal, and the continuing to charge further specifically includes: when the temperature is higher than equal-10 ℃ and lower than 0 ℃, the charging and discharging module sets the charging current to be a first set current for charging; when the temperature is greater than or equal to 0 ℃ and less than 40 ℃, the charging and discharging module sets the charging current to be a second set current for charging; when the temperature is greater than or equal to 40 ℃ and less than or equal to 60 ℃, the charging and discharging module sets the charging current to be a third set current for charging.

In a preferred embodiment, the resistor NTC _2 is a thermistor, the resistance is represented as different resistance values following the change of the peripheral environment temperature of the two serially connected batteries, VREF is set during charging and discharging, the VREF is a reference voltage with a fixed value, the voltage value of the node of the NTC _2 follows the resistance change of the resistor NTC _2, the charging and discharging module performs ADC sampling on the node voltage of the NTC _2, and the sampled node voltage values of different NTC _2 correspond to different peripheral environment temperatures of the two serially connected batteries; the node voltage value of NTC _2 is stored in the charge-discharge module, when the node voltage value of NTC _2 changes, an INT # pin of the charge-discharge module outputs a pulse signal, an I2C signal informs an AP module, after the AP module acquires the INT # pin pulse signal, the node voltage value of NTC _2 of the charge-discharge module is read through an I2C signal, the peripheral environment temperature of the double-battery-cell series battery is acquired, and when the temperature is greater than or equal to a first limited temperature and less than a second limited temperature, a first set current, a second set current and a third set current are set for the charging current of the charge-discharge module; when the temperature is higher than equal-10 ℃ and lower than 0 ℃, the charging and discharging module sets the charging current as a first set current to charge; when the temperature is greater than or equal to 0 ℃ and less than 40 ℃, the charging and discharging module sets the charging current to be a second set current for charging; when the temperature is greater than or equal to 40 ℃ and less than or equal to 60 ℃, the charging and discharging module sets the charging current to be a third set current for charging.

In a preferred embodiment, the discharging of the two batteries connected in series is further specifically: the electric quantity meter module acquires the temperature through the resistor NTC _1, sends the acquired temperature to the AP module, and the AP module receives the temperature and judges: when the temperature is lower than a third limit temperature or higher than a fourth limit temperature, the AP module sends a discharge prohibition signal to the charge and discharge module, and the charge and discharge module receives the signal and is powered off;

the AP module controls the CE # pin of the charge-discharge module at high and low levels through the CHG _ CE signal, controls the on and off of the charge-discharge modules BAT1 and BAT2 and SYS1 and SYS2, and realizes the discharge and discharge prohibition operation of the two-section series battery.

In a preferred embodiment, the device of the present invention further comprises: the electricity meter module records a charging curve and a discharging curve by detecting the voltage of the two batteries connected in series in real time, and calculates the battery capacity; and sending the battery capacity and the charging times to the AP module, informing the AP module of battery abnormity when the electricity meter detects the battery abnormity, and reading the battery ID configuration by the electricity meter module and sending the battery ID configuration to the AP module.

Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a two sections series battery charge-discharge device of handheld sign indicating number POS of sweeping face which characterized in that: the method comprises the following steps: the battery comprises an AP module, a charge-discharge module, a fuel gauge module, a resistor NTC _1, a resistor NTC _2 and a double-battery series battery, wherein the AP module is respectively connected with the charge-discharge module and the fuel gauge module, and the charge-discharge module is connected with the fuel gauge module; the double-battery-in-series battery is respectively connected with the charge-discharge module and the electricity meter module, the charge-discharge module is connected to the resistor NTC _2, the electricity meter module is connected to the resistor NTC _1, the resistor NTC _2 is arranged on one side of the double-battery-in-series battery, and the resistor NTC _1 is arranged in the double-battery-in-series battery.

2. The POS double-battery series-connection battery charging and discharging device with the handheld code and face sweeping function as claimed in claim 1, wherein: the charging and discharging module comprises a charging chip, and the charging chip is respectively connected with the AP module, the fuel gauge module, the resistor NTC _2 and the double batteries connected in series.

3. The POS double-battery series-connection battery charging and discharging device with the handheld code and face sweeping function as claimed in claim 1, wherein: the electricity meter module comprises an electricity meter chip, and the electricity meter chip is respectively connected with the AP module, the charge-discharge module, the resistor NTC _1 and the double batteries connected in series.