CN106324506A

CN106324506A - Embedded equipment battery test method, device and system

Info

Publication number: CN106324506A
Application number: CN201510337528.2A
Authority: CN
Inventors: 凃浩明
Original assignee: JUCAI MICRO DEVICES (SHENZHEN) CO Ltd
Current assignee: JUCAI MICRO DEVICES (SHENZHEN) CO Ltd
Priority date: 2015-06-17
Filing date: 2015-06-17
Publication date: 2017-01-11

Abstract

The invention discloses an embedded equipment battery test method, device and system. The method comprises the steps that when terminal voltage of a battery reaches the maximum voltage, the control terminal of a switching circuit is enabled to be low-level so as to stop charging to the battery; the battery discharges at constant discharge current until the terminal voltage of the battery reaches the minimum voltage, the terminal voltage and the discharge current of the battery are acquired according to the preset sampling frequency, and first discharge time consumed by discharging of the battery from the maximum voltage to the minimum voltage at the constant discharge current is acquired; first discharge internal resistance of the battery is read; and the present open-circuit voltage OCV of the battery is calculated according to the acquired terminal voltage and the discharge current of the battery and the first discharge internal resistance of the battery; and the time point of the state of charge SOC of the battery in each discharge interval is acquired according to the first discharge time, then the corresponding OCV value of the time point is searched and then an OCV-SOV table is generated. With application of the embedded equipment battery test method, device and system, the battery can be conveniently and rapidly tested so as to be simple and easy to implement.

Description

The battery testing method of embedded device, Apparatus and system

Technical field

The present invention relates to cell art, particularly relate to a kind of embedded device battery testing method, Apparatus and system.

Background technology

Battery (such as lithium battery), because of advantages such as its energy density are high, have extended cycle life, is widely used in In electric automobile, portable electric appts.Battery in use, its state-of-charge be one important The actual electricity that can be provided by and the electricity that can be provided by when being completely filled with electricity under index, i.e. current state Ratio, represents with SOC (State Of Charge), it is known that the dump energy of battery current state, It is easy to cell managing device and battery is sent various instruction.Open-circuit voltage, i.e. battery are under open-circuit condition Terminal voltage, represents with OCV (Open Circuit Voltage), it is considered that battery is after charge or discharge Through standing for a long time, battery has eliminated polarization impact and has reached steady statue, battery in this time two ends Voltage be open-circuit voltage, open-circuit voltage is not affected by charging and discharging currents, with battery material and charged shape State is relevant.The OCV-SOC curve of battery is an important datum curve, is mainly used in open-circuit voltage method The state-of-charge of estimation battery, i.e. just can learn the dump energy of battery by measuring open-circuit voltage.

The assay method of current battery SOC-OCV, needs at a relatively high professional skill and complicated test Equipment completes, and tests apparatus expensive, and user can not oneself be done directly, and causes great inconvenience. It addition, the assay method of current battery SOC-OCV, need to measure SOC and OCV simultaneously, survey Examination process is complicated.

Summary of the invention

Present invention is primarily targeted at and the battery testing method of a kind of embedded device, device are provided and are System, it is intended to conveniently test battery, generates SOC-OCV table, it is not necessary to use special survey Trial work tool and equipment.

For achieving the above object, the present invention provides the battery testing method of a kind of embedded device, the method Including:

When the terminal voltage of battery reaches maximum voltage, the control end making on-off circuit is low level, to stop Only battery is charged；

To battery with constant discharge current electric discharge until the terminal voltage of battery reaches minimum voltage, and according in advance If sample frequency gathers the terminal voltage of battery, discharge current, and obtains described battery with constant discharge current The first discharge time consumed when maximum voltage discharges into minimum voltage；

Read the first electric discharge internal resistance of described battery；

First electric discharge internal resistance of the terminal voltage of the battery according to described collection, discharge current and described battery, Calculate the open-circuit voltage OCV that battery is current；

According to the described state-of-charge SOC time at each discharge range obtaining battery the first discharge time Point, then search the OCV value that described time point is corresponding, then generate OCV-SOC table.

Preferably, when the terminal voltage of battery reaches maximum voltage, the control end making on-off circuit is low electricity Flat, before stopping the step to battery charging, described method also includes:

Generate the first electric discharge internal resistance of described battery.

Preferably, the step of the first electric discharge internal resistance of the described battery of described generation includes:

When battery is charged to maximum voltage, charging current is set to 0, and makes the control end of on-off circuit For low level, control battery and discharge, until battery discharge is to minimum voltage；

When battery is discharged, it is the brightest electric discharge first by the backlight of the LCD of embedded device Preset Time, then closes the second Preset Time by the LCD of embedded device；By embedded device After LCD closes the second Preset Time, it is the brightest electric discharge by the backlight of the LCD of embedded device again One Preset Time, then closes the second Preset Time by the LCD of embedded device, circulates successively, until Battery discharge is to minimum voltage；And according to preset sample frequency gather the first voltage atdischarge end of battery, the One discharge current, and obtain the second discharge time that described battery is consumed from maximum voltage to minimum voltage；

Calculate the described battery the second electric discharge internal resistance R during each discharge cycles_{N is put in circulation}；

According to described second electric discharge internal resistance R_{N is put in circulation}Calculate the first electric discharge internal resistance R of described battery_Put。

Preferably, described method also includes:

According to the second electric discharge internal resistance R during described second discharge time and each discharge cycles_{N is put in circulation}, Export the electric discharge internal drag curve of described battery.

Preferably, described method also includes:

When to battery discharge to minimum voltage, the control end making on-off circuit is high level, enters battery Row charging；

When battery is charged, with constant charging current to described battery charging the 3rd Preset Time, It is then shut off charging current the 4th Preset Time；After charge closing electric current the 4th Preset Time, again with perseverance Described battery is charged the 3rd Preset Time by fixed charging current, is then shut off charging current the 4th when presetting Between, circulate successively, until battery is charged to maximum voltage；And gather battery according to preset sample frequency First charging end voltage, the first charging current, and obtain described battery from minimum voltage to maximum voltage institute The first charging interval consumed；

Calculate battery internal charging resistance R during each charging cycle_{N is filled in circulation}；

According to the internal charging resistance R during described first charging interval and each charging cycle_{N is filled in circulation}, defeated Go out the internal charging resistance curve of described battery.

For achieving the above object, the present invention also provides for the battery tester of a kind of embedded device, described Device is connected with battery, tests battery, and described device includes on-off circuit, control module, with The open-circuit voltage that the processing module that battery connects is connected with processing module calculates module, with described open circuit electricity The read module that pressure computing module connects, calculate with processing module and open-circuit voltage that module is connected respectively the One generation module, the first input end of described battery is connected with the first outfan of power supply adaptor, described Second input of battery is connected with the outfan of described on-off circuit, the input of described on-off circuit with Second outfan of described power supply adaptor connects, the control end of described on-off circuit and described control module Control end connect；Wherein:

Described control module, for when the terminal voltage of battery reaches maximum voltage, makes the control of on-off circuit End processed is low level, to stop charging battery；

Described processing module, for reaching until the terminal voltage of battery with constant discharge current electric discharge battery Minimum voltage, and gather the terminal voltage of battery, discharge current according to preset sample frequency, and obtain described The first discharge time that battery is consumed when maximum voltage discharges into minimum voltage with constant discharge current；

Described open-circuit voltage calculates module, for the terminal voltage of battery according to described collection, discharge current With the first electric discharge internal resistance of described battery, calculate the open-circuit voltage OCV that battery is current；

Described read module, for reading the first electric discharge internal resistance of described battery；

Described first generation module, for according to the described state-of-charge obtaining battery the first discharge time SOC is at the time point of each discharge range, then searches the OCV value that described time point is corresponding, then generates OCV-SOC table.

Preferably, described device also includes that be connected respectively with described read module and processing module second is raw Become module, for generating the first electric discharge internal resistance.

Preferably, described second generation module includes the first computing unit and the second computing unit；

Described control module, is additionally operable to, when battery is charged to maximum voltage, charging current is set to 0, And to make the control end of on-off circuit be low level, control battery and discharge, until battery discharge is to minimum Voltage；

Described processing module, is additionally operable to when discharging battery, by the back of the body of the LCD of embedded device Light settings is the brightest electric discharge the first Preset Time, when then the LCD closedown second of embedded device being preset Between；After the LCD of embedded device is closed the second Preset Time, again by the LCD of embedded device Backlight be the brightest electric discharge the first Preset Time, then the LCD of embedded device is closed second pre- If the time, circulate successively, until battery discharge is to minimum voltage；And gather electricity according to preset sample frequency First voltage atdischarge end in pond, the first discharge current, and obtain described battery from maximum voltage to minimum electricity The second discharge time that pressure is consumed；

Described first computing unit, for calculating the battery the second electric discharge during each discharge cycles Internal resistance R_{N is put in circulation}；

Described second computing unit, for according to described second electric discharge internal resistance internal resistance R_{N is put in circulation}Calculate first to put Electricity internal resistance R_Put。

Preferably, described device also includes be connected respectively with described second generation module and processing module One output module, described first output module, for according to described second discharge time and each electric discharge The second electric discharge internal resistance R in cyclic process_{N is put in circulation}, export the electric discharge internal drag curve of described battery.

Preferably, described device also includes the 3rd computing unit being connected with described processing module, with described The second output module that processing module and the 3rd computing unit connect respectively,

Described control module, is additionally operable to, when to battery discharge to minimum voltage, make the control of on-off circuit End is high level, is charged battery；

Described processing module, is additionally operable to when being charged battery, with constant charging current to described Battery charging the 3rd Preset Time, is then shut off charging current the 4th Preset Time；At charge closing electric current After 4th Preset Time, again with constant charging current to described battery charging the 3rd Preset Time, then Charge closing electric current the 4th Preset Time, circulates successively, until battery is charged to maximum voltage；And according to Preset sample frequency gathers the first charging end voltage of battery, the first charging current, and obtains described battery The first charging interval consumed from minimum voltage to maximum voltage；

Described 3rd computing unit, for calculating battery internal charging resistance R during each charging cycle_{N is filled in circulation}；

Described second output module, for according to described first charging interval and each charging cycle process In internal charging resistance R_{N is filled in circulation}, export the internal charging resistance curve of described battery.

For achieving the above object, the present invention also provides for the battery test system of a kind of embedded device, including The battery tester of the embedded device described in any of the above-described item, and with the battery of described embedded device The battery that test device connects.

Use technical scheme, when the terminal voltage of battery reaches maximum voltage, make on-off circuit Control end be low level, with stop to battery charge；To battery with constant discharge current electric discharge until electricity The terminal voltage in pond reaches minimum voltage, and gathers the terminal voltage of battery, electric discharge electricity according to preset sample frequency Stream, and obtain what described battery was consumed when maximum voltage discharges into minimum voltage with constant discharge current First discharge time；Read the first electric discharge internal resistance of described battery；The end electricity of the battery according to described collection First electric discharge internal resistance of pressure, discharge current and described battery, calculates the open-circuit voltage OCV that battery is current； According to the described state-of-charge SOC time point at each discharge range obtaining battery the first discharge time, Search the OCV value that described time point is corresponding again, then generate OCV-SOC table.Use the present invention, can Conveniently battery is tested, simple easily enforcement, do not use special test equipment and specialty Test technical ability.

Accompanying drawing explanation

Fig. 1 is the schematic flow sheet of the first embodiment of the battery testing method of embedded device of the present invention；

Fig. 2 is the schematic flow sheet of the second embodiment of the battery testing method of embedded device of the present invention；

Fig. 3 is the detailed process schematic diagram of step S15 in Fig. 2；

Fig. 4 is the electric discharge internal drag curve of the battery exported in the battery testing method of embedded device of the present invention Schematic diagram；

Fig. 5 is the schematic flow sheet of the 3rd embodiment of the battery testing method of embedded device of the present invention；

Fig. 6 is the internal charging resistance curve of the battery exported in the battery testing method of embedded device of the present invention Schematic diagram；

Fig. 7 is the structural representation of the first embodiment of the battery tester of embedded device of the present invention；

Fig. 8 is the structural representation of the second embodiment of the battery tester of embedded device of the present invention.

The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, do referring to the drawings further Explanation.

Detailed description of the invention

Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit Determine the present invention.

The present invention provides the battery testing method of a kind of embedded device, with reference to Fig. 1, in one embodiment, The battery testing method of this embedded device includes:

S10, when the terminal voltage of battery reaches maximum voltage, the control end making on-off circuit is low level, To stop battery being charged.

This battery connects power supply adaptor by on-off circuit, and power supply adaptor is connected with external power source, should On the control end controlling the control module that end is connected to embedded device of on-off circuit, it is used for controlling whether Battery is charged, when the incoming level controlling end of on-off circuit is high level, this on-off circuit Conducting, battery is charged by external power source by power supply adaptor, when on-off circuit control end defeated Entering level when being low level, this on-off circuit disconnects, and external power source stops charging battery.

The maximum voltage of different batteries differs, and in the present embodiment, the maximum voltage of battery is 4.18V. In this step, battery is charged to maximum voltage, will be full of by battery, reach maximum state-of-charge, The electricity that i.e. we are commonly seen is 100%；Maximum voltage is reached in the terminal voltage that battery is charged to this battery Time, the control end output low level of the control module of embedded device is to the control end of on-off circuit, switch Circuit disconnects, and stops being charged battery.

S11, to battery with constant discharge current electric discharge until the terminal voltage of battery reaches minimum voltage, and press Gather the terminal voltage of battery, discharge current according to preset sample frequency, and obtain this battery with constant discharge electricity The first discharge time that stream was consumed when maximum voltage discharges into minimum voltage.

This constant discharge current can pre-set according to actual needs.The minimum voltage of different batteries differs, In the present embodiment, the minimum voltage of battery is 3.4V.

This battery is discharged into minimum voltage with constant discharge current, in discharge process, adopts according to presetting The terminal voltage of sample frequency collection battery, discharge current, and obtain this battery discharge and complete required first Discharge time T.In one embodiment, in a complete discharge process, this first discharge time, T could It can be 5 hours.

This preset sample frequency can pre-set, and as may be configured as 1 time/second, within the most each second, gathers once electricity The terminal voltage in pond, discharge current.Accordingly, the most recordable sampling number.

S12, read this battery first electric discharge internal resistance.

In this step, the specific deposit position from the first electric discharge internal resistance reads this first electric discharge internal resistance.

S13, the first electric discharge internal resistance according to the terminal voltage of battery, discharge current and this battery of this collection, Calculate the open-circuit voltage OCV that battery is current.

The computing formula of the open-circuit voltage OCV that this battery is current is as follows: OCV=V_bat+R_Put* I, wherein V_batRepresent the terminal voltage of battery, R_PutRepresent that the first electric discharge internal resistance of battery, I represent the discharge current of battery.

In this step, the open-circuit voltage OCV that this battery is current is calculated in real time, when adopting in step s 11 The number of times of collection is the most, and the number of the open-circuit voltage OCV the most here calculated is the most.Such as preset and adopt Sample frequency is 1 time/second, and the first discharge time was 5 hours, then sampled 18000 in whole discharge process Secondary, the most in this step, calculate 18000 open-circuit voltage OCV, the corresponding each sampled point of difference The open-circuit voltage OCV of battery.

The discharge current I of the battery gathered may be identical with this constant discharge current, it is also possible to has small difference Not, in the ideal situation, the discharge current I of the battery of this collection is identical with constant discharge current.

S14, obtain the state-of-charge SOC of battery according to this first discharge time at each discharge range Time point, then search the OCV value that this time point is corresponding, then generate OCV-SOC table.

Because this battery discharges with constant discharge current, therefore the state-of-charge SOC of this battery is respectively Individual discharge range presents linear decrease state, can be by the division that was averaged for the first discharge time, really The state-of-charge of this battery fixed is at time point corresponding to each discharge range.As being the first discharge time 5 little Time, dividing 100 equal portions by 5 hours, the most each equal portions are 180 seconds, then arrived the 1st second discharge time When the 180th second, the state-of-charge SOC of this battery is 100%, discharge time be the 181st second to When 360 seconds, the state-of-charge SOC of this battery is 99%, discharge time be the 361st second to the 540th During the second, the state-of-charge SOC of this battery is 98%, the like, it is the 17821st second in discharge time During by the 18000th second, the state-of-charge of this battery is 1%；Then according to each of the state-of-charge of battery Time point finds the OCV value of correspondence, and when being 100% such as the state-of-charge of battery, corresponding time point is The 1st second to the 180th second discharge time, then search and be calculated by the 180th second the 1st second this discharge time OCV value, in step s 12, the 1st second discharge time to the 180th time, acquire 180 times, The most calculated OCV value has 180, can these 180 OCV value additions be averaged, as The OCV value that the state-of-charge of this battery is corresponding when being 100%, then generates OCV-SOC table, such as table Shown in one.

Table one:

The second embodiment flow process with reference to the battery testing method that Fig. 2, Fig. 2 are embedded device of the present invention is shown It is intended to.

The first embodiment of battery testing method based on above-mentioned embedded device, before step S10, The method also includes:

S15, generate this battery first electric discharge internal resistance.

In this step, generating the first electric discharge internal resistance of this battery, battery is in the process of use, and it first is put Electricity internal resistance also can respective change, time as long in service time of battery, this first electric discharge internal resistance can increase.

In one embodiment, as it is shown on figure 3, this step S15 includes:

S150, when battery is charged to maximum voltage, charging current is set to 0, and makes on-off circuit Control end be low level, control battery discharge, until battery discharge is to minimum voltage.

When original state, the incoming level controlling end of on-off circuit is high level, and external power source passes through Battery is charged by power supply adaptor, when battery is charged to maximum voltage, charging current is set to 0, Allowing this battery standing 20 minutes, the incoming level controlling end making on-off circuit the most again is low level, control Battery processed discharges, and the functional module on this embedded device can be powered by this battery.

S151, when battery is discharged, the backlight of the LCD of embedded device is put for the brightest Electricity the first Preset Time, then closes the second Preset Time by the LCD of embedded device；By embedded After the LCD of equipment closes the second Preset Time, it is by the backlight of the LCD of embedded device again Bright electric discharge the first Preset Time, then closes the second Preset Time by the LCD of embedded device, follows successively Ring, until battery discharge is to minimum voltage；And the first discharge end of battery is gathered according to preset sample frequency Voltage, the first discharge current, and obtain that this battery consumed from maximum voltage to minimum voltage second put The electricity time.

This preset sample frequency can pre-set, as could be arranged to 1 time/second.

This first Preset Time can be arranged according to actual needs, and as could be arranged to 10 minutes, this is second years old Preset Time can be arranged according to actual needs, as could be arranged to 30 seconds.

When battery is discharged, it is the brightest electric discharge first by the backlight of the LCD of embedded device Preset Time, is the brightest by the backlight of the LCD of this embedded device, then can strengthen discharge current； After the backlight of the LCD of embedded device is the brightest electric discharge the first Preset Time, then will embed The LCD of formula equipment closes the second Preset Time, and LCD closes so that discharge current reduces, in order to calculate Second electric discharge internal resistance.

It is being the brightest electric discharge the first Preset Time by the backlight of the LCD of embedded device, then by embedding The LCD entering formula equipment closes the second Preset Time；Preset the LCD of embedded device is closed second After time, it is the brightest electric discharge the first Preset Time by the backlight of the LCD of embedded device again, then The LCD of embedded device is closed the second Preset Time, circulates successively, i.e. in battery discharge procedure, It is the brightest electric discharge the first Preset Time by the backlight of the LCD of embedded device, then sets embedded It is a circulation that standby LCD closes the second Preset Time.In each cyclic process of this battery discharge, Whether the terminal voltage detecting this battery in real time is preferably minimized voltage, if the terminal voltage of this battery has been lowered to Low-voltage, then this battery stops electric discharge, calculate that this battery consumed from maximum voltage to minimum voltage the Two discharge time t1.

S152, calculating battery the second electric discharge internal resistance R during each discharge cycles_{N is put in circulation}。

In one embodiment, this battery the second electric discharge internal resistance R during each discharge cycles_{N is put in circulation} Obtained by formula calculated below: R_{N is put in circulation}=(V0-V1)/(I0-I1), wherein, V0 represents that battery exists Magnitude of voltage before LCD closedown, V1 represent that battery magnitude of voltage after LCD closes, I0 represent that battery exists Current value before LCD closedown, I1 represent battery current value after LCD closes.

This V0 can be the first voltage atdischarge end average gathered in 10 seconds before this LCD closes Value, when being 1 time/second such as sample frequency, then the first electric discharge gathered in 10 seconds before this LCD closes Terminal voltage has 10, and being averaged by these 10 first voltage atdischarge ends obtains this V0.This V1 is permissible It is the meansigma methods of the first voltage atdischarge end gathered in 10 seconds after this LCD closes, such as sample frequency When being 1 time/second, then the first voltage atdischarge end gathered in 10 seconds after this LCD closes has 10, These 10 first voltage atdischarge ends are averaged and obtains this V1.

In like manner, putting down of the first discharge current gathered in this I0 can be 10 seconds before this LCD closes Average, when being 1 time/second such as sample frequency, then first gathered in 10 seconds before this LCD closes is put Electricity electric current has 10, and being averaged by these 10 first discharge currents obtains this I0.This I1 can be This LCD close after 10 seconds in the meansigma methods of the first discharge current that gathers, as sample frequency be 1 time/ Second time, then this LCD close after 10 seconds in gather the first discharge current have 10, by this 10 Individual first discharge current is averaged and is obtained this I1.

The the second electric discharge internal resistance R that will calculate_{N is put in circulation}It is saved in discharge_info.log file, and will This discharge_info.log file is saved in the specific deposit position of the first electric discharge internal resistance.

S153, according to this second electric discharge internal resistance R_{N is put in circulation}Calculate the first electric discharge internal resistance R_Put。

In one embodiment, this first electric discharge internal resistance R_PutObtained by formula calculated below: R_Put=(R_Circulation _{Put 1}+R_{Circulation puts 2}+R_{Circulation puts 3}+……+R_{N is put in circulation})/n, wherein n represents discharge cycles number of times.

In this step, by the second electric discharge internal resistance R calculated in step S152_{N is put in circulation}Ask Meansigma methods, obtains this first electric discharge internal resistance R_Put, the first electric discharge internal resistance R obtained can be made_PutMore accurate.

Further, after step S152, the method also includes:

S154, according to during this second discharge time and each discharge cycles second electric discharge internal resistance R_Follow _{Ring puts n}, export the electric discharge internal drag curve of this battery.

In this step, the electric discharge internal drag curve of battery battery in discharge process is exported, in order to user Understand the electric discharge inner resistance of this battery.

In one embodiment, be averaged division to this second discharge time of t1, determines the charged of this battery State is at time point corresponding to each discharge range.As being the second discharge time 5 hours, 5 hours are drawn Being divided into 10 equal portions, the most each equal portions are 30 minutes, when discharge time is the 1st second to the 1800th second, The state-of-charge SOC of this battery is 100%, when discharge time is the 1801st second to the 3600th second, The state-of-charge SOC of this battery is 90%, the like, discharge time be the 16201st second to When 18000 seconds, the state-of-charge of this battery is 10%；Then according to each time of the state-of-charge of battery Point finds the electric discharge internal resistance R during the discharge cycles of correspondence_{N is put in circulation}, if the state-of-charge of battery is 100% Time, corresponding time point is the 1st second to the 1800th second, then obtain between the 1st second to the 1800th second All discharge cycles during electric discharge internal resistance R_{N is put in circulation}, all of electric discharge internal resistance R to this acquisition_Circulation _{Put n}Average, obtain electric discharge internal resistance corresponding when the state-of-charge SOC of this battery is 100%, In like manner, when being 90% such as the state-of-charge of battery, corresponding time point is the 1801st second to the 3600th second, Then obtain the electric discharge internal resistance R during all discharge cycles between the 1801st second to the 3600th second_Circulation _{Put n}, all of electric discharge internal resistance R to this acquisition_{N is put in circulation}Average, obtain the charged shape of this battery The electric discharge internal resistance that state SOC is corresponding when being 90%, the like, respectively obtain the state-of-charge SOC of this battery It is the electric discharge internal resistance of 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10% correspondence, then Generating electric discharge internal drag curve, abscissa represents the state-of-charge SOC of this battery, in vertical coordinate represents electric discharge Resistance, as shown in Figure 4.

The 3rd embodiment flow process with reference to the battery testing method that Fig. 5, Fig. 5 are embedded device of the present invention is shown It is intended to.

The first embodiment of battery testing method based on above-mentioned embedded device, the method also includes:

S20, when to battery discharge to minimum voltage, the control end making on-off circuit is high level, to electricity Pond is charged.

The minimum voltage of different batteries differs, and in the present embodiment, the minimum voltage of battery is 3.4V. In this step, during to battery discharge to minimum voltage, i.e. battery electric quantity has been used up.Arrive at battery discharge During minimum voltage, the end that controls of the control module of embedded device exports high level to the control of on-off circuit End, is charged battery.

S21, when battery is charged, with constant charging current to this battery charging the 3rd preset time Between, it is then shut off charging current the 4th Preset Time；After charge closing electric current the 4th Preset Time, again With constant charging current to this battery charging the 3rd Preset Time, it is then shut off charging current the 4th and presets Time, circulate successively, until battery is charged to maximum voltage；And gather battery according to preset sample frequency The first charging end voltage, the first charging current, and obtain this battery from minimum voltage to maximum voltage institute The first charging interval consumed.

This constant current can pre-set according to actual needs, as may be configured as 1A.This preset sample frequency Can pre-set, as could be arranged to 1 time/second.

3rd Preset Time can be arranged according to actual needs, and as could be arranged to 10 minutes, this is second years old Preset Time can be arranged according to actual needs, as could be arranged to 30 seconds.

When battery is charged, with constant charging current to this battery charging the 3rd Preset Time, so Rear charge closing electric current the 4th Preset Time so that electric current reduces, in order to calculate internal charging resistance.

This battery charged the 3rd Preset Time with constant charging current, be then shut off charging current the Four Preset Times；After charge closing electric current the 4th Preset Time, again with constant charging current to this electricity Pond charging the 3rd Preset Time, is then shut off charging current the 4th Preset Time, circulates successively, i.e. at electricity In the charging process of pond, by with constant charging current to this battery charge the 3rd Preset Time, be then shut off Charging current the 4th Preset Time is a circulation.In each cyclic process that this battery charges, in real time Whether the terminal voltage detecting this battery reaches maximum voltage, if the terminal voltage of this battery has reached maximum voltage, Then stop this battery is charged, calculate the first charging that this battery is consumed from minimum voltage to maximum voltage Time t2.

S22, calculating battery internal charging resistance R during each charging cycle_{N is filled in circulation}。

In one embodiment, this internal charging resistance R_{N is filled in circulation}Obtained by formula calculated below: R_{N is filled in circulation}= (V2-V3)/(I2-I3), wherein, V2 represents battery magnitude of voltage before charge closing electric current, V3 table Show battery magnitude of voltage after charge closing electric current, I2 represent battery current value before charge closing electric current, I3 represents battery current value after charge closing electric current.

This V2 can be the average of the first charging end voltage of gathering in 10 seconds before charge closing electric current Value, when being 1 time/second such as sample frequency, then first gathered in 10 seconds before this charge closing electric current is filled Electricity terminal voltage has 10, and being averaged by these 10 the first charging end voltages obtains this V2.This V3 can To be the meansigma methods of the first charging end voltage gathered in 10 seconds after this charge closing electric current, such as sampling When frequency is 1 time/second, then the first charging end voltage gathered in 10 seconds after this charge closing electric current has 10, these 10 the first charging end voltages are averaged and obtains this V3.

In like manner, the first charging current gathered in this I2 can be 10 seconds before this charge closing electric current Meansigma methods, when being 1 time/second such as sample frequency, then the gathered in 10 seconds before this charge closing electric current One charging current has 10, and these 10 first charging currents being averaged obtains this I2.This I3 is permissible It is the meansigma methods of the first charging current gathered in 10 seconds after this charge closing electric current, such as sample frequency When being 1 time/second, then the first charging current gathered in 10 seconds after this charge closing electric current has 10, These 10 first charging currents are averaged and obtains this I3.

S23, according to the internal charging resistance R during this first charging interval and each charging cycle_{N is filled in circulation}, Export the internal charging resistance curve of this battery.

In this step, the internal charging resistance curve of battery battery in charging process is exported, in order to user Understand the internal charging resistance characteristic of this battery.

In one embodiment, be averaged division to this first charging interval t2, determines the charged of this battery State is at the interval corresponding time point of each charging.If the first charging interval was 5 hours, 5 hours are drawn Being divided into 10 equal portions, the most each equal portions are 30 minutes, when the charging interval is the 1st second to the 1800th second, The state-of-charge SOC of this battery is 10%, when the charging interval is the 1801st second to the 3600th second, and should The state-of-charge SOC of battery is 20%, the like, the charging interval be the 16201st second to the 18000th During the second, the state-of-charge of this battery is 100%；Then look for according to each time point of the state-of-charge of battery Internal charging resistance R during corresponding charging cycle_{N is filled in circulation}, when being 10% such as the state-of-charge of battery, Corresponding time point is the 1st second to the 1800th second, then obtain the institute between the 1st second to the 1800th second There is the internal charging resistance R during charging cycle_{Circulation is put and is filled}, all of internal charging resistance R to this acquisition_{N is filled in circulation}Enter Row is averaged, and obtains internal charging resistance corresponding when the state-of-charge SOC of this battery is 10%, in like manner, When being 20% such as the state-of-charge of battery, corresponding time point be the 1801st second by the 3600th second, then obtain Take the internal charging resistance R during all charging cycle between the 1801st second to the 3600th second_{N is filled in circulation}, All of internal charging resistance R to this acquisition_{N is filled in circulation}Average, obtain the state-of-charge of this battery The internal charging resistance that SOC is corresponding when being 20%, the like, respectively obtain the state-of-charge SOC of this battery It is the internal charging resistance of 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% correspondence, then Generating internal charging resistance curve, abscissa represents the state-of-charge SOC of this battery, in vertical coordinate represents charging Resistance, as shown in Figure 6.

First embodiment structure with reference to the battery tester that Fig. 7, Fig. 7 are embedded device of the present invention is shown Be intended to, this device 100 is connected with battery 20, tests battery, this device include on-off circuit 21, Control module 10, the open-circuit voltage that the processing module 11 being connected with battery 20 is connected with processing module 11 Computing module 12, calculates, with this open-circuit voltage, the read module 14 that module 12 is connected, with processing module 11 The first generation module 13 that module 12 connects respectively is calculated, the first input of this battery 20 with open-circuit voltage End is connected with the first outfan of power supply adaptor 22, the second input of this battery 20 and this switch electricity The outfan on road 21 connects, and the input of this on-off circuit 21 exports with the second of this power supply adaptor 22 End connects, and the end that controls of this on-off circuit 21 is connected with the control end of this control module 10；Wherein:

This control module 10, for when the terminal voltage of battery 20 reaches maximum voltage, makes on-off circuit The control end of 21 is low level, to stop charging battery 20；

This processing module 11, for reaching until the terminal voltage of battery with constant discharge current electric discharge battery 20 To minimum voltage, and gather the terminal voltage of battery 20, discharge current according to preset sample frequency, and obtain During the first electric discharge that this battery 20 is consumed when maximum voltage discharges into minimum voltage with constant discharge current Between；

This open-circuit voltage calculates module 12, for the terminal voltage of battery 20 according to this collection, discharge current With the first electric discharge internal resistance of this battery 20, calculate the open-circuit voltage OCV that battery 20 is current；

This read module 14, for reading the first electric discharge internal resistance of this battery；

This first generation module 13, for according to the state-of-charge obtaining battery 20 this first discharge time SOC is at the time point of each discharge range, then searches the OCV value that this time point is corresponding, then generates OCV-SOC table.

The computing formula of the open-circuit voltage OCV of this battery is as follows: OCV=V_bat+R_Put* I, wherein V_batTable Show the terminal voltage of battery 20, R_PutRepresent that the first electric discharge internal resistance of battery 20, I represent the electric discharge of battery 20 Electric current

This battery 20 connects power supply adaptor 22, power supply adaptor 22 and external electrical by on-off circuit 21 Source 23 connects.The control end of this on-off circuit 21 is connected to the control of the control module 10 of embedded device On end, it is used for controlling whether battery 20 is charged, when the input electricity controlling end of on-off circuit 21 When putting down as high level, this on-off circuit 21 turns on, and external power source 23 passes through power supply adaptor 22 to battery 20 are charged, when the incoming level controlling end of on-off circuit 21 is low level, and this on-off circuit 21 disconnect, and external power source 23 stops charging battery 20.

The maximum voltage of different batteries 20 differs, and in the present embodiment, the maximum voltage of battery 20 is 4.18V.Battery 20 is charged to maximum voltage, will be full of by battery 20, reach maximum state-of-charge, The electricity that i.e. we are commonly seen is 100%；Reach maximum in the terminal voltage that battery 20 is charged to this battery During voltage, the control end output low level of the control module 10 of embedded device is to the control of on-off circuit 21 End processed, on-off circuit 21 disconnects, and stops being charged battery 20.

This constant discharge current can pre-set according to actual needs.The minimum voltage not phase of different batteries 20 With, in the present embodiment, the minimum voltage of battery 20 is 3.4V.

This processing module 11 discharges into minimum voltage to this battery 20 with constant discharge current, is discharging Cheng Zhong, gathers the terminal voltage of battery 20, discharge current according to preset sample frequency, and obtains this battery 20 Discharged required first discharge time T.In a complete discharge process, during this first electric discharge Between T may be 5 hours.

This preset sample frequency can pre-set, and as may be configured as 1 time/second, within the most each second, gathers once electricity The terminal voltage in pond 20, discharge current.Accordingly, the most recordable sampling number.

This read module 14 reads this first electric discharge internal resistance from the specific deposit position of the first electric discharge internal resistance.

This open-circuit voltage calculate module 12 calculate the open-circuit voltage OCV that this battery 20 is current in real time, when The number of times gathered in processing module 11 is the most, and the number of the open-circuit voltage OCV the most here calculated is just The most.Such as preset sample frequency is 1 time/second, and the first discharge time was 5 hours, then in whole electric discharge During sampled 18000 times, then this open-circuit voltage calculate module 12 calculate 18000 open-circuit voltages OCV, respectively the open-circuit voltage OCV of the battery 20 of corresponding each sampled point.

The discharge current I of the battery 20 gathered may be identical with this constant discharge current, it is also possible to has small Difference, in the ideal situation, the discharge current I of the battery 20 of this collection is identical with constant discharge current.

Because this battery 20 discharges with constant discharge current, the therefore state-of-charge SOC of this battery 20 Presenting linear decrease state, i.e. this first generation module 13 at each discharge range can be by the first electric discharge Time is averaged division, determines that the state-of-charge of this battery 20 is at time point corresponding to each discharge range. As being the first discharge time 5 hours, dividing 100 equal portions by 5 hours, the most each equal portions are 180 seconds, Then when the 1st second to the 180th second discharge time, the state-of-charge SOC of this battery 20 is 100%, When discharge time is the 181st second to the 360th second, the state-of-charge SOC of this battery 20 is 99%, When discharge time is the 361st second to the 540th second, the state-of-charge SOC of this battery 20 is 98%, depends on Secondary analogizing, when discharge time is the 17821st second to the 18000th second, the state-of-charge of this battery 20 is 1%；Then this first generation module 13 finds correspondence according to each time point of the state-of-charge of battery 20 OCV value, when being 100% such as the state-of-charge of battery 20, corresponding time point is discharge time the 1st Second by the 180th second, then searches the 1st second to the 180th second this discharge time of calculated OCV value, Processing module 11 the 1st second discharge time to the 180th time, acquire 180 times, the most calculated OCV value has 180, can average, these 180 OCV value additions as the lotus of this battery 20 The OCV value that electricity condition is corresponding when being 100%, then generates OCV-SOC table, as shown in above-mentioned table one.

Further, this device also includes be connected respectively with this read module 14 and processing module 11 Two generation modules 15, for generating the first electric discharge internal resistance.

Battery 20 use process, its first electric discharge internal resistance also can respective change, when using such as battery 20 Between long time, this first electric discharge internal resistance can increase.

Further, this second generation module 15 includes the first computing unit 151 and the second computing unit 152；

This control module 10, is additionally operable to when battery 20 is charged to maximum voltage, charging current is arranged It is 0, and to make the control end of on-off circuit 21 be low level, control battery 20 and discharge, until battery 20 discharge into minimum voltage；

This processing module 11, is additionally operable to when discharging battery 20, by the LCD of embedded device Backlight be the brightest electric discharge the first Preset Time, then the LCD of embedded device is closed second pre- If the time；After the LCD of embedded device is closed the second Preset Time, again by the LCD of embedded device Backlight be the brightest electric discharge the first Preset Time, then the LCD of embedded device is closed second pre- If the time, circulate successively, until battery 20 discharges into minimum voltage；And according to preset sample frequency collection First voltage atdischarge end of battery 20, the first discharge current, and obtain this battery 20 from maximum voltage to The second discharge time that minimum voltage is consumed；

This first computing unit 152, for calculating battery 20 second during each discharge cycles Electric discharge internal resistance R_{N is put in circulation}；

This second computing unit 152, for according to this second electric discharge internal resistance internal resistance R_{N is put in circulation}Calculate first to put Electricity internal resistance R_Put。

When original state, control module 10 make this on-off circuit 21 control end incoming level be High level, battery 20 is charged by power supply adaptor 22, fills at battery 20 by external power source 23 When electricity is to maximum voltage, charging current is set to 0, allows this battery 20 stand 20 minutes, then this control Molding block 10 makes the incoming level controlling end of on-off circuit 21 be low level, controls battery 20 and puts Electricity, the functional module on this embedded device can be powered by this battery 20.

The backlight of the LCD of embedded device, when discharging battery 20, is set by this processing module 11 It is set to the brightest electric discharge the first Preset Time, is the brightest, then by the backlight of the LCD of this embedded device Discharge current can be strengthened；The backlight of the LCD of embedded device is being preset for the brightest electric discharge first After time, then the LCD of embedded device closing the second Preset Time, LCD closes so that electric discharge Electric current reduces, in order to calculate the second electric discharge internal resistance.

It is being the brightest electric discharge the first Preset Time by the backlight of the LCD of embedded device, then by embedding The LCD entering formula equipment closes the second Preset Time；Preset the LCD of embedded device is closed second After time, it is the brightest electric discharge the first Preset Time by the backlight of the LCD of embedded device again, then The LCD of embedded device is closed the second Preset Time, circulates successively, i.e. at battery 20 discharge process In, it is the brightest electric discharge the first Preset Time by the backlight of the LCD of embedded device, then will embed It is a circulation that the LCD of formula equipment closes the second Preset Time.Each circulation in the electric discharge of this battery 20 During, this processing module 11 detects whether the voltage of this battery 20 is preferably minimized voltage in real time, if should The voltage of battery 20 has been lowered to minimum voltage, then this battery 20 stop electric discharge, calculate this battery 20 from Maximum voltage to minimum voltage consumed second discharge time t1.

Calculate second electric discharge internal resistance is saved in discharge_info.log by this second computing unit 152 In file, and this discharge_info.log file is saved in the specific deposit position of the first electric discharge internal resistance.

This second computing unit 152 is by the second electric discharge internal resistance R calculated in the first computing unit_Follow _{Ring puts n}Average, obtain this first electric discharge internal resistance R_Put, the first electric discharge internal resistance R obtained can be made_PutMore accurate.

Further, this device also includes being connected respectively with this second generation module 15 and processing module 11 The first output module 16, the during according to this second discharge time and each discharge cycles Two electric discharge internal resistance R_{N is put in circulation}, export the electric discharge internal drag curve of this battery 20.

This first output module 16 exports the electric discharge internal drag curve of the battery 20 battery 20 in discharge process, So that user understands the electric discharge inner resistance of this battery 20.

In one embodiment, this second discharge time of t1 is averaged division by this first output module 16, Determine that the state-of-charge of this battery 20 is at time point corresponding to each discharge range.As the second discharge time was 5 hours, being divided into 10 equal portions by 5 hours, the most each equal portions are 30 minutes, are the 1st in discharge time When second was by the 1800th second, the state-of-charge SOC of this battery 20 is 100%, is the 1801st in discharge time When second was by the 3600th second, the state-of-charge SOC of this battery 20 is 90%, the like, when electric discharge Between when being the 16201st second to the 18000th second, the state-of-charge of this battery 20 is 10%；Then first is defeated During going out the discharge cycles that module 16 finds correspondence according to each time point of the state-of-charge of battery 20 Electric discharge internal resistance R_{N is put in circulation}, when being 100% such as the state-of-charge of battery 20, corresponding time point is the 1st Second by the 1800th second, then during obtaining all discharge cycles between the 1st second to the 1800th second Electric discharge internal resistance R_{N is put in circulation}, all of electric discharge internal resistance R to this acquisition_{N is put in circulation}Average, be somebody's turn to do Electric discharge internal resistance corresponding when being 100% for the state-of-charge SOC of battery 20, in like manner, such as the lotus of battery 20 When electricity condition is 90%, corresponding time point be the 1801st second by the 3600th second, then obtain the 1801st The electric discharge internal resistance R during all discharge cycles between second to the 3600th second_{N is put in circulation}, institute to this acquisition Some electric discharge internal resistance R_{N is put in circulation}Averaging, the state-of-charge SOC obtaining this battery 20 is 90% Time corresponding electric discharge internal resistance, the like, respectively obtain the state-of-charge SOC of this battery 20 be 80%, 70%, the electric discharge internal resistance of 60%, 50%, 40%, 30%, 20%, 10% correspondence, then generates in electric discharge Resistance curve, abscissa represents the state-of-charge SOC of this battery 20, and vertical coordinate represents electric discharge internal resistance, such as figure Shown in 4.

The second example structure with reference to the battery tester that Fig. 8, Fig. 8 are embedded device of the present invention is shown It is intended to.

The first embodiment of battery tester based on above-mentioned embedded device, this device also includes and is somebody's turn to do The 3rd computing unit 17 that processing module 11 connects, with this processing module 11 and the 3rd computing unit 17 points The second output module 18 not connected.

This control module 10, is additionally operable to, when battery 20 is discharged into minimum voltage, make on-off circuit 21 Control end be high level, battery 20 is charged；

This processing module 11, is additionally operable to when being charged battery 20, with constant charging current to this Battery 20 charges the 3rd Preset Time, is then shut off charging current the 4th Preset Time；At charge closing electricity After flowing the 4th Preset Time, this battery 20 charged the 3rd Preset Time with constant charging current again, so Rear charge closing electric current the 4th Preset Time, circulates successively, until battery 20 is charged to maximum voltage；And Gather the first charging end voltage of battery 20, the first charging current according to preset sample frequency, and acquisition should The first charging interval that battery 20 is consumed from minimum voltage to maximum voltage；

3rd computing unit 17, for calculating in the battery 20 charging during each charging cycle Resistance R_{N is filled in circulation}；

This second output module 18, during according to this first charging interval and each charging cycle Internal charging resistance R_{N is filled in circulation}, export the internal charging resistance curve of this battery 20.

The minimum voltage of different batteries 20 differs, and in the present embodiment, the minimum voltage of battery 20 is 3.4V.When battery 20 is discharged into minimum voltage, i.e. battery 20 electricity has been used up.Discharge at battery 20 During to minimum voltage, the control end output high level of the control module 10 of embedded device is to on-off circuit 21 Control end, battery 20 is charged.

This battery 20, when battery 20 is charged, is filled by this processing module 11 with constant charging current Electricity the 3rd Preset Time, is then shut off charging current the 4th Preset Time so that electric current reduces, in order to meter Calculate internal charging resistance.

This battery 20 charged the 3rd Preset Time with constant charging current, be then shut off charging current 4th Preset Time；After charge closing electric current the 4th Preset Time, again with constant charging current to this Battery 20 charges the 3rd Preset Time, is then shut off charging current the 4th Preset Time, circulates successively, i.e. In battery 20 charging process, this battery 20 will be charged the 3rd Preset Time with constant charging current, Being then shut off charging current the 4th Preset Time is a circulation.Each being circulated throughout in the charging of this battery 20 Cheng Zhong, whether the voltage detecting this battery 20 in real time reaches maximum voltage, if the voltage of this battery 20 is Reach maximum voltage, then stop this battery 20 is charged, calculate this battery 20 from minimum voltage to maximum The first charging interval t2 that voltage is consumed.

This second output module 18 exports the internal charging resistance curve of the battery 20 battery 20 in charging process, So that user understands the internal charging resistance characteristic of this battery 20.

In one embodiment, this first charging interval t2 is averaged division by this second output module 18, Determine that the state-of-charge of this battery 20 is at the interval corresponding time point of each charging.As the first charging interval was 5 hours, being divided into 10 equal portions by 5 hours, the most each equal portions are 30 minutes, are the 1st in the charging interval When second was by the 1800th second, the state-of-charge SOC of this battery 20 is 10%, is the 1801st in the charging interval When second was by the 3600th second, the state-of-charge SOC of this battery 20 is 20%, the like, when charging Between when being the 16201st second to the 18000th second, the state-of-charge of this battery 20 is 100%；Then second Output module 17 finds the charging cycle process of correspondence according to each time point of the state-of-charge of battery 20 In internal charging resistance R_{N is filled in circulation}, when being 10% such as the state-of-charge of battery 20, corresponding time point is the 1st Second by the 1800th second, then during obtaining all charging cycle between the 1st second to the 1800th second Internal charging resistance R_{Circulation is put and is filled}, all of internal charging resistance R to this acquisition_{N is filled in circulation}Average, be somebody's turn to do The internal charging resistance that the state-of-charge SOC of battery 20 is corresponding when being 10%, in like manner, charged such as battery 20 When state is 20%, corresponding time point is the 1801st second to the 3600th second, then obtain the 1801st second The internal charging resistance R during all charging cycle between the 3600th second_{N is filled in circulation}, this acquisition is owned Internal charging resistance R_{N is filled in circulation}Average, obtain the state-of-charge SOC of this battery 20 when being 20% Corresponding internal charging resistance, the like, respectively obtain the state-of-charge SOC of this battery 20 be 30%, 40%, the internal charging resistance of 50%, 60%, 70%, 80%, 90%, 100% correspondence, then generates charging Internal drag curve, abscissa represents the state-of-charge SOC of this battery 20, and vertical coordinate represents internal charging resistance, as Shown in Fig. 6.

The present invention also provides for the battery test system of a kind of embedded device, including any of the above-described technical scheme The battery tester of embedded device, and the electricity being connected with the battery tester of this embedded device Pond.

These are only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every Utilize equivalent structure or equivalence flow process conversion that description of the invention and accompanying drawing content made, or directly or Connect and be used in other relevant technical fields, be the most in like manner included in the scope of patent protection of the present invention.

Claims

1. the battery testing method of an embedded device, it is characterised in that described method includes:

Read the first electric discharge internal resistance of described battery；

2. the battery testing method of embedded device as claimed in claim 1, it is characterised in that work as electricity When the terminal voltage in pond reaches maximum voltage, the control end making on-off circuit is low level, to stop battery Before the step of charging, described method also includes:

Generate the first electric discharge internal resistance of described battery.

3. the battery testing method of embedded device as claimed in claim 2, it is characterised in that described The step of the first electric discharge internal resistance generating described battery includes:

4. the battery testing method of embedded device as claimed in claim 3, it is characterised in that described Method also includes:

5. the battery testing method of embedded device as claimed in claim 2, it is characterised in that described Method also includes:

6. the battery tester of an embedded device, it is characterised in that described device is connected with battery, Testing battery, described device includes on-off circuit, control module, the process mould being connected with battery The open-circuit voltage that block is connected with processing module calculates module, calculates what module was connected with described open-circuit voltage Read module, calculates, with processing module and open-circuit voltage, the first generation module that module is connected respectively, described The first input end of battery is connected with the first outfan of power supply adaptor, the second input of described battery It is connected with the outfan of described on-off circuit, the input of described on-off circuit and described power supply adaptor Second outfan connects, and the end that controls of described on-off circuit is connected with the control end of described control module；Its In:

7. the battery tester of embedded device as claimed in claim 6, it is characterised in that described Device also includes the second generation module being connected respectively with described read module and processing module, is used for generating First electric discharge internal resistance.

8. the battery tester of embedded device as claimed in claim 7, it is characterised in that described Second generation module includes the first computing unit and the second computing unit；

9. the battery tester of embedded device as claimed in claim 8, it is characterised in that described Device also includes the first output module being connected respectively with described second generation module and processing module, described First output module, for according to second during described second discharge time and each discharge cycles Electric discharge internal resistance R_{N is put in circulation}, export the electric discharge internal drag curve of described battery.

10. the battery tester of embedded device as claimed in claim 7, it is characterised in that institute State the 3rd computing unit that device also includes being connected with described processing module, with described processing module and the 3rd The second output module that computing unit connects respectively,

The battery test system of 11. 1 kinds of embedded devices, it is characterised in that include such as claim 6 To the battery tester of the embedded device described in 10 any one, and with the battery of described embedded device The battery that test device connects.