CN206945919U - Electric quantity of lithium battery test device - Google Patents
Electric quantity of lithium battery test device Download PDFInfo
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- CN206945919U CN206945919U CN201720647469.3U CN201720647469U CN206945919U CN 206945919 U CN206945919 U CN 206945919U CN 201720647469 U CN201720647469 U CN 201720647469U CN 206945919 U CN206945919 U CN 206945919U
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Abstract
The utility model discloses a kind of electric quantity of lithium battery test device, including constant-current discharge module, control of discharge module, data acquisition module and processing and control module；Processing and control module includes Date Conversion Unit, data processing unit and control unit；Constant-current discharge module is connected respectively with control of discharge module and data acquisition module connection；Control of discharge module is connected with Date Conversion Unit and control unit respectively；Data acquisition module is connected with Date Conversion Unit；Data processing unit is connected with Date Conversion Unit and control unit respectively；The utility model overdischarge control module coordinates constant-current discharge module to carry out control of discharge to battery, and discharge current and discharge time are recorded by data processing unit, the final technical scheme for obtaining battery capacity, there is convenient and swift, the accurate technique effect for obtaining battery capacity.
Description
Technical field
Battery electric quantity test device is the utility model is related to, specifically relates to a kind of electric quantity of lithium battery test device, is belonged to
In battery electric quantity test device technical field.
Background technology
At present, lithium battery quality is uneven, and electricity often differs greatly with itself mark, and user is in purchase lithium battery
Afterwards, it can not judge whether the lithium battery quality of purchase is up to standard, and especially whether electricity reaches mark.To lithium battery quality, especially
It is that measuring for electric quantity of lithium battery must could be completed by the electric quantity of lithium battery test device of specialty, but the lithium battery of specialty
Test device complex operation is measured, price is also higher, and domestic consumer does not possess the condition tested electric quantity of lithium battery.
The content of the invention
The purpose of this utility model is to provide a kind of electric quantity of lithium battery test device, to realize the accurate of electric quantity of lithium battery
Test provides hardware circuit, conveniently and efficiently detects lithium battery quality.
To reach above-mentioned purpose, the utility model is achieved by the following technical programs：
A kind of electric quantity of lithium battery test device, including constant-current discharge module 1, control of discharge module 2, data acquisition module 3
And processing and control module 4；
Processing and control module 4 includes Date Conversion Unit 41, data processing unit 42 and control unit 43；
Constant-current discharge module 1 is connected with control of discharge module 2 and data acquisition module 3 respectively；Control of discharge module 2 is divided
It is not connected with Date Conversion Unit 41 and control unit 43；Data acquisition module 3 is connected with Date Conversion Unit 41；At data
Reason unit 42 is connected with Date Conversion Unit 41 and control unit 43 respectively.
The purpose of this utility model can also further be realized by following technical measures：
Further, the constant-current discharge module 1 includes：Direct current source interface DC, resistance R3, resistance R4, resistance R5, resistance
R7, resistance R9, variable resistor R1, electrochemical capacitor C1, electric capacity C3, electrochemical capacitor C4, controllable accurate source of stable pressure U1, N ditch field-effect
Pipe Q1 and operational amplifier U2A；
Direct current source interface DC 2 pin are connected with positive 12 volts of dc sources and resistance R9 one end respectively；The resistance R9 other ends
Negative electrode with controllable accurate source of stable pressure U1, controllable accurate source of stable pressure U1 reference pole, electrochemical capacitor C1 positive poles and variable respectively
Resistance R1 1 pin connection；Variable resistor R1 2 pin are connected with resistance R3 one end；The resistance R3 other ends respectively with electric capacity C3 mono-
The 3 pin connection at end, resistance R4 one end and operational amplifier U2A；Operational amplifier U2A 2 pin respectively with resistance R7 one end with
And N ditch FETs Q1 S poles connection；Operational amplifier U2A 1 pin is connected with N ditch FETs Q1 G poles；N ditch field-effects
Pipe Q1 D poles are connected with resistance R5 one end；Operational amplifier U2A 8 pin are connected with positive 12 volts of dc sources；The resistance R5 other ends
It is connected with electrochemical capacitor C4 positive poles and control of discharge module 2；Direct current source interface DC 1 pin is respectively with simulating ground, controllable accurate
Source of stable pressure U1 anode, electrochemical capacitor C1 negative poles, variable resistor R1 3 pin, the electric capacity C3 other end, the resistance R4 other ends, fortune
Calculate amplifier U2A 4 pin, electrochemical capacitor C4 negative poles and the resistance R7 other ends connection；Data acquisition module is accessed at resistance R7 both ends
Block 3.
Further；The data acquisition module 3 includes：Resistance R2, resistance R6, resistance R8, resistance R11 and computing are put
Big device U2B；
Operational amplifier U2B 5 pin are connected with resistance R7 one end；Operational amplifier U2B 6 pin respectively with resistance R2 one end
And resistance R8 one end connection；Operational amplifier U2B 7 pin respectively with the resistance R2 other ends, resistance R6 one end and resistance R11
One end connects；The resistance R11 other ends are connected with Date Conversion Unit 41；The resistance R8 other ends respectively with the resistance R7 other ends, electricity
Hinder the R6 other ends and operational amplifier U2B 4 pin connection.
Further, the control of discharge module 2 includes：Resistance R10, resistance R12, resistance R13, resistance R14, triode
Q2, diode D1, LED 1 and relay K1；
Control unit 43 is connected with resistance R13 one end；The resistance R13 other ends respectively with resistance R12 one end and triode
Q2 base stages connect；The resistance R12 other ends are connected with positive 5 volts of power supplys and triode Q2 emitter stages respectively；Relay K1 3 pin with
Anode connects, and relay K1 4 pin are hanging, relay K1 1 the pin colelctor electrode with triode Q2, light emitting diode respectively
LED1 positive poles and the connection of diode D1 negative poles；Relay K1 5 pin connect with resistance R10 one end and the resistance R5 other ends respectively
Connect；Relay K1 2 pin are connected with diode D1 positive poles, simulation ground and resistance R14 one end respectively；The resistance R14 other ends with
The negative pole of LED 1 connects；The resistance R10 other ends are connected with Date Conversion Unit 41.
Further, the processing and control module 4 is Arduino development boards, wherein, Date Conversion Unit 41 is that ADC is adopted
Sample circuit；Data processing unit 42 and control unit 43 are programmable chips.
Compared with prior art, the beneficial effects of the utility model are：
In the utility model, constant-current discharge module is coordinated to carry out control of discharge to battery by control of discharge module, and
Discharge current and discharge time are recorded by data processing unit, the final technical scheme for obtaining battery capacity, can be with
It is convenient and swift, accurately obtain battery capacity.
In the utility model, the discharge current of constant-current discharge module is controlled by adjustable resistance, is suitable for not
With battery and test environment.
In the utility model, operational amplifier is amplified to sampled voltage, can improve sampling precision, improves capacity
The precision of detection.
In the utility model, by control relay attracting state, the control to battery charging and discharging is realized, can be prevented
Over-discharge damages battery.
Brief description of the drawings
Fig. 1 is the system block diagram of the utility model electric quantity of lithium battery test device；
Fig. 2 is the specific embodiment circuit diagram of the utility model electric quantity of lithium battery test device.
Wherein, 1- constant-current discharges module, 2- control of discharge modules, 3- data acquisition modules, 4- processing and control modules；41-
Date Conversion Unit；42- data processing units；43- control units.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, electric quantity of lithium battery test device provided by the utility model includes constant-current discharge module 1, electric discharge control
Molding block 2, data acquisition module 3 and processing and control module 4；
Processing and control module 4 includes Date Conversion Unit 41, data processing unit 42 and control unit 43；
Constant-current discharge module 1 is connected respectively with control of discharge module 2 and data acquisition module 3 connects；Control of discharge mould
Block 2 is connected with Date Conversion Unit 41 and control unit 43 respectively；Data acquisition module 3 is connected with Date Conversion Unit 41；
Data processing unit 42 is connected with Date Conversion Unit 41 and control unit 43 respectively.
The utility model combines control of discharge module 2 by constant-current discharge module 1 and discharge process, number is carried out to mesuring battary
Discharge voltage is acquired according to acquisition module 3, and analog voltage signal is converted into by digital letter by Date Conversion Unit 41
Data processing unit 42 number is passed to, data processing unit 42 is carried out according to incoming voltage and discharge time to battery capacity
Calculate.In order to protect security of the battery in discharge process, using data processing unit 42 by control unit 43 to electric discharge
The discharge condition of control module 2 controls, and when cell voltage is less than certain value, stops control of discharge 2 electric discharge to battery of module.
As shown in Fig. 2 constant-current discharge module 1 includes：Direct current source interface DC, resistance R3, resistance R4, resistance R5, resistance R7,
Resistance R9, variable resistor R1, electrochemical capacitor C1, electric capacity C3, electrochemical capacitor C4, controllable accurate source of stable pressure U1, N ditch FET Q1
And operational amplifier U2A；Data acquisition module 3 includes：Resistance R2, resistance R6, resistance R8, resistance R11 and operation amplifier
Device U2B；Control of discharge module 2 includes：Resistance R10, resistance R12, resistance R13, resistance R14, triode Q2, diode D1, hair
Optical diode LED1 and relay K1；
Direct current source interface DC 2 pin are connected with positive 12 volts of dc sources and resistance R9 one end respectively；The resistance R9 other ends
Negative electrode with controllable accurate source of stable pressure U1, controllable accurate source of stable pressure U1 reference pole, electrochemical capacitor C1 positive poles and variable respectively
Resistance R1 1 pin connection；Variable resistor R1 2 pin are connected with resistance R3 one end；The resistance R3 other ends respectively with electric capacity C3 mono-
The 3 pin connection at end, resistance R4 one end and operational amplifier U2A；Operational amplifier U2A 2 pin respectively with resistance R7 one end with
And N ditch FETs Q1 S poles connection；Operational amplifier U2A 1 pin is connected with N ditch FETs Q1 G poles；N ditch field-effects
Pipe Q1 D poles are connected with resistance R5 one end；Operational amplifier U2A 8 pin are connected with positive 12 volts of dc sources；The resistance R5 other ends
It is connected with electrochemical capacitor C4 positive poles；Direct current source interface DC 1 pin respectively with simulation ground, controllable accurate source of stable pressure U1 anode, electricity
Solve electric capacity C1 negative poles, variable resistor R1 3 pin, the electric capacity C3 other end, the resistance R4 other ends, operational amplifier U2A 4 pin,
Electrochemical capacitor C4 negative poles and the connection of the resistance R7 other ends；Operational amplifier U2B 5 pin are connected with resistance R7 one end；Computing is put
Big device U2B 6 pin are connected with resistance R2 one end and resistance R8 one end respectively；Operational amplifier U2B 7 pin respectively with resistance R2
The other end, resistance R6 one end and the connection of resistance R11 one end；The resistance R11 other ends are connected with Date Conversion Unit 41；Resistance R8
4 pin of the other end respectively with the resistance R7 other ends, the resistance R6 other ends and operational amplifier U2B are connected；Control unit 43 with
Resistance R13 one end connects；The resistance R13 other ends are connected with resistance R12 one end and triode Q2 base stages respectively；Resistance R12 is another
One end is connected with positive 5 volts of power supplys and triode Q2 emitter stages respectively；Relay K1 3 pin are connected with anode, and 4 pin hang
Sky, the colelctor electrode with triode Q2, the positive pole of LED 1 and diode D1 negative poles are connected 1 pin respectively；Relay K1
5 pin be connected respectively with resistance R10 one end and the resistance R5 other ends；Relay K1 2 pin respectively with diode D1 positive poles, mould
Intend ground and the connection of resistance R14 one end；The resistance R14 other ends are connected with the negative pole of LED 1；The resistance R10 other ends with
Date Conversion Unit 41 connects.
Operational amplifier U2A and operational amplifier U2B can select a LM358N with double operational, controllable accurate
Source of stable pressure U1 selects TL431, forms a constant-current discharge circuit in conjunction with N ditch FETs Q1, discharge current can be by can
The resistance for becoming resistance R1 is adjusted, and according to design parameter, discharge current can adjust between 50mA to 2A.
Operational amplifier U2B and resistance R2 and resistance R8 forms the operation amplifier electricity of 10 times of amplifications of an anode input
Road, the amplifying circuit amplify the pressure drop on resistance R7, then analog voltage are converted into digital letter by Date Conversion Unit 41
Number, magnitude of voltage is converted into current value by data processing unit 42 according to Ohm's law, so as to obtain real-time discharge current.
In use, full electric mesuring battary positive pole is linked on relay K1 3 pin, the now non-adhesives of relay K1；
I.e. relay K1 3 pin and 4 pin are connected.When needing electric discharge, control unit 43 exports low level, triode Q2 conductings, relay
Device K1 adhesives；I.e. relay K1 3 pin and 5 pin are connected, and mesuring battary discharge circuit is connected, the luminous instruction of LED 1
Start to discharge, now data processing unit 42 starts timing, and by being linked into the resistance R10 of Date Conversion Unit 41 come in real time
Cell voltage is detected, when the cell voltage monitored is more than discharge cut-off voltage, then continues electric discharge simultaneously timing, when monitoring electricity
When cell voltage is less than blanking voltage, then terminates and discharge and stop timing, now control unit 43 exports high level, and triode Q2 is not
Turn on again, relay K1 coils disconnect；Relay K1 3 pin and 4 pin are connected, and are realized and are stopped electric discharge, prevent over-discharge from damaging
Battery.
Data processing unit 42 combines the discharge time of the discharge current obtained and record, passes through calculation formula：
Battery capacity (mah MAHs)=discharge time (hour) * discharge currents (milliampere)；
To calculate battery capacity.
The utility model can realize that is, processing and control module 4 is developed from Arduino by Arduino development boards
Plate, Date Conversion Unit 41, number can be realized using ADC change-over circuits, control and the process chip in Arduino development boards
According to processing unit 42 and the function of control unit 43.Other modules of the present utility model can independently be used as an external extension
Plate is integrally accessed in Arduino development boards, and expansion board goes for the Arduino such as UNO, MEGA2560, LEONARDO, M0 and opened
Plate and other compatible Arduino development boards are sent out, the exploitation such as Arduino mini, Micro is readily applicable to by being adapted to conversion
Plate.
In addition to the implementation, the utility model can also have other embodiment, all to use equivalent substitution or equivalent change
The technical scheme of shape is changed, all falls within the protection of the requires of the utility model.
Claims (5)
- A kind of 1. electric quantity of lithium battery test device, it is characterised in that including：Constant-current discharge module (1), control of discharge module (2), Data acquisition module (3) and processing and control module (4)；Processing and control module (4) includes Date Conversion Unit (41), data processing unit (42) and control unit (43)；Constant-current discharge module (1) is connected with control of discharge module (2) and data acquisition module (3) respectively；Control of discharge module (2) it is connected respectively with Date Conversion Unit (41) and control unit (43)；Data acquisition module (3) and Date Conversion Unit (41) connect；Data processing unit (42) is connected with Date Conversion Unit (41) and control unit (43) respectively.
- 2. electric quantity of lithium battery test device as claimed in claim 1, it is characterised in that the constant-current discharge module (1) includes： Direct current source interface DC, resistance R3, resistance R4, resistance R5, resistance R7, resistance R9, variable resistor R1, electrochemical capacitor C1, electric capacity C3, Electrochemical capacitor C4, controllable accurate source of stable pressure U1, N ditch FET Q1 and operational amplifier U2A；Direct current source interface DC 2 pin are connected with positive 12 volts of dc sources and resistance R9 one end respectively；The resistance R9 other ends are distinguished Reference pole, electrochemical capacitor C1 positive poles and the variable resistor of negative electrode, controllable accurate source of stable pressure U1 with controllable accurate source of stable pressure U1 R1 1 pin connection；Variable resistor R1 2 pin are connected with resistance R3 one end；The resistance R3 other ends respectively with electric capacity C3 one end, electricity Hinder R4 one end and operational amplifier U2A 3 pin connection；Operational amplifier U2A 2 pin respectively with resistance R7 one end and N ditches FET Q1 S poles connection；Operational amplifier U2A 1 pin is connected with N ditch FETs Q1 G poles；N ditch FETs Q1 D poles be connected with resistance R5 one end；Operational amplifier U2A 8 pin are connected with positive 12 volts of dc sources；The resistance R5 other ends and electricity Solve electric capacity C4 positive poles and control of discharge module (2) connection；Direct current source interface DC 1 pin is steady with simulation ground, controllable accurate respectively Potential source U1 anode, electrochemical capacitor C1 negative poles, variable resistor R1 3 pin, the electric capacity C3 other end, the resistance R4 other ends, computing Amplifier U2A 4 pin, electrochemical capacitor C4 negative poles and the connection of the resistance R7 other ends；Data acquisition module is accessed at resistance R7 both ends (3)。
- 3. electric quantity of lithium battery test device as claimed in claim 2, it is characterised in that the data acquisition module (3) includes： Resistance R2, resistance R6, resistance R8, resistance R11 and operational amplifier U2B；Operational amplifier U2B 5 pin are connected with resistance R7 one end；Operational amplifier U2B 6 pin respectively with resistance R2 one end and Resistance R8 one end connects；Operational amplifier U2B 7 pin respectively with the resistance R2 other ends, resistance R6 one end and resistance R11 one end Connection；The resistance R11 other ends are connected with Date Conversion Unit (41)；The resistance R8 other ends respectively with the resistance R7 other ends, resistance The R6 other ends and operational amplifier U2B 4 pin connect.
- 4. electric quantity of lithium battery test device as claimed in claim 3, it is characterised in that the control of discharge module (2) includes： Resistance R10, resistance R12, resistance R13, resistance R14, triode Q2, diode D1, LED 1 and relay K1；Control unit (43) is connected with resistance R13 one end；The resistance R13 other ends respectively with resistance R12 one end and triode Q2 Base stage connects；The resistance R12 other ends are connected with positive 5 volts of power supplys and triode Q2 emitter stages respectively；Relay K1 3 pin and electricity The connection of pond positive pole, relay K1 4 pin are hanging, relay K1 1 the pin colelctor electrode with triode Q2, light emitting diode respectively LED1 positive poles and the connection of diode D1 negative poles；Relay K1 5 pin connect with resistance R10 one end and the resistance R5 other ends respectively Connect；Relay K1 2 pin are connected with diode D1 positive poles, simulation ground and resistance R14 one end respectively；The resistance R14 other ends with The negative pole of LED 1 connects；The resistance R10 other ends are connected with Date Conversion Unit (41).
- 5. the electric quantity of lithium battery test device as described in any in claim 1-4, it is characterised in that the processing and control module (4) it is Arduino development boards, wherein, Date Conversion Unit (41) is ADC sample circuits；Data processing unit (42) and control Unit (43) processed is programmable chip.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720647469.3U CN206945919U (en) | 2017-06-06 | 2017-06-06 | Electric quantity of lithium battery test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720647469.3U CN206945919U (en) | 2017-06-06 | 2017-06-06 | Electric quantity of lithium battery test device |
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| CN206945919U true CN206945919U (en) | 2018-01-30 |
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| CN201720647469.3U Active CN206945919U (en) | 2017-06-06 | 2017-06-06 | Electric quantity of lithium battery test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990364A (en) * | 2017-06-06 | 2017-07-28 | 镇江市高等专科学校 | Electric quantity of lithium battery test device |
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2017
- 2017-06-06 CN CN201720647469.3U patent/CN206945919U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990364A (en) * | 2017-06-06 | 2017-07-28 | 镇江市高等专科学校 | Electric quantity of lithium battery test device |
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