CN209356650U - A kind of cell phone battery capacity detection circuit - Google Patents
A kind of cell phone battery capacity detection circuit Download PDFInfo
- Publication number
- CN209356650U CN209356650U CN201822007269.9U CN201822007269U CN209356650U CN 209356650 U CN209356650 U CN 209356650U CN 201822007269 U CN201822007269 U CN 201822007269U CN 209356650 U CN209356650 U CN 209356650U
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- resistance
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- voltage comparator
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Abstract
The utility model discloses a kind of cell phone battery capacity detection circuits, battery of mobile phone anode and NMOS tube drain electrode connect, NMOS tube grid is connect with one output end of voltage comparator, one inverting input terminal of voltage comparator is connect with first diode, silicon-controlled cathode respectively with two non-inverting input terminal of voltage comparator, eleventh resistor connection, 7th resistance, the common end of 8th resistance is connect with the first NPN transistor base, first NPN triode collector is connect by third diode with the second NPN transistor base, second NPN transistor base is connected to third diode cathode, second NPN triode collector is connect with power supply, second NPN triode emitter is connect with quartz clock anode, quartz clock cathode ground connection.The utility model has the beneficial effects that by being discharged by battery with constant electric current fully charged battery, discharge time is recorded by quartz clock, and stopping electric discharge when battery decline is to lower voltage limit, discharge current and the product of discharge time are exactly the capacity of battery.
Description
Technical field
The utility model belongs to battery of mobile phone field, and in particular to a kind of cell phone battery capacity detection circuit.
Background technique
With the continuous development of mechanics of communication, mobile phone becomes the indispensable tool of people, and as the function of mobile phone is got over
Come it is more, such as: stock, news, weather, traffic, commodity, application program downloading, music picture downloading, therefore, mobile phone
Frequency of use increasingly increases, and cell-phone battery electric-charge quantity selects a standard of mobile phone as people.For handset manufacturers, more
It should be ensured that the problem of cell phone battery capacity, therefore, manufacturer, should detect cell phone battery capacity, it is ensured that battery of mobile phone is full
The volumetric(al) standards set enough.
Utility model content
To overcome technological deficiency of the existing technology, the utility model discloses a kind of cell phone battery capacity detection electricity
Road is detected, it is ensured that cell phone battery capacity is normal by capacity of the detection circuit to battery of mobile phone.
Technical solution adopted by the utility model to solve its technical problems is a kind of cell phone battery capacity detection circuit, packets
Battery of mobile phone, the first NPN triode, the second NPN triode, NMOS tube, power supply, voltage comparator one, voltage is included to compare
Device two, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance,
9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor, the 14th resistance, first capacitor, the one or two
Pole pipe, the second diode, third diode, quartz clock and silicon-controlled；
Battery of mobile phone anode and NMOS tube drain electrode connect, and NMOS tube source electrode is grounded by first resistor, and NMOS tube grid is logical
It crosses 3rd resistor to connect with one output end of voltage comparator, NMOS tube grid is also grounded by second resistance, and NMOS tube source electrode is logical
It crosses the 4th resistance to connect with one inverting input terminal of voltage comparator, one inverting input terminal of voltage comparator and first diode cathode
Connection, first diode anode are connect with two output end of voltage comparator, and eleventh resistor one end is connect with power supply, and the tenth
The one resistance other end is successively connected with the 6th resistance, the 5th resistance, and the common end of the 6th resistance and the 5th resistance and voltage ratio
It is connected compared with one non-inverting input terminal of device；
9th resistance one end is connect with battery of mobile phone anode, and the 9th resistance other end is connected with the tenth resistance, the 9th resistance,
The common end of tenth resistance is connect with two inverting input terminal of voltage comparator, silicon-controlled cathode respectively with the same phase of voltage comparator two
Input terminal, eleventh resistor connection, silicon-controlled plus earth, first capacitor are connected in parallel between SCR control pole and ground, voltage
Two output end of comparator passes sequentially through the 7th resistance, the 8th resistance eutral grounding, the common end and first of the 7th resistance, the 8th resistance
NPN transistor base connection, the first NPN triode collector are connect with the second diode cathode, third diode cathode respectively,
Second diode cathode is connect with the 9th resistance, the tenth resistance common end, third diode cathode and the second NPN transistor base
Connection, the first NPN triode emitter ground connection；
Twelfth resistor one end is connect with eleventh resistor, and the other end is grounded by thirteenth resistor, tri- pole the 2nd NPN
Pipe base stage is connected to the common end of twelfth resistor and thirteenth resistor, and the second NPN triode collector is connect with power supply,
Second NPN triode emitter is also connect with quartz clock anode by the 14th resistance eutral grounding, the second NPN triode emitter,
Quartz clock cathode ground connection.
It preferably, further include the second capacitor, the second capacitor is connected in parallel to battery of mobile phone both ends.
It preferably, further include ammeter, ammeter anode is connect with battery of mobile phone anode, and ammeter cathode and NMOS tube are leaked
Pole connection.
Preferably, further include light emitting diode, light emitting diode anode is connect with power supply, light emitting diode cathode with
The connection of second NPN triode collector.
Preferably, the model LM358 of the voltage comparator one and voltage comparator two.
The utility model has the beneficial effects that its structure is simple, and it is at low cost, by guaranteeing hand to battery of mobile phone electric power detection
The quality of machine battery, specifically, being remembered by being discharged by battery with constant electric current fully charged battery by quartz clock
Record discharge time, and when battery decline arrive lower voltage limit when stop discharge, discharge current and the product of discharge time are exactly battery
Capacity.
Detailed description of the invention
Fig. 1 is a kind of specific embodiment schematic illustration of the utility model.
Fig. 2 is another specific embodiment schematic illustration of the utility model.
Appended drawing reference: E- battery, C1- first capacitor, the second capacitor of C2-, the first NPN triode of Q1-, the 2nd NPN tri- of Q2-
Pole pipe, Q3-NMOS pipe, U1- voltage comparator one, U2- voltage comparator two, U3- is silicon-controlled, D1- first diode, D2- the
Two diodes, D3- third diode, ZD- breakdown pipe, R1- first resistor, R2- second resistance, R3- 3rd resistor, R4- the 4th
Resistance, the 5th resistance of R5-, the 6th resistance of R6-, the 7th resistance of R7-, the 8th resistance of R8-, the 9th resistance of R9-, the tenth electricity of R10-
Resistance, R11- eleventh resistor, R12- twelfth resistor, R13- thirteenth resistor, the 14th resistance of R14-, LED- light-emitting diodes
Pipe, VCC- power supply, A- ammeter.
Specific embodiment
More detailed description is done to the embodiments of the present invention below in conjunction with attached drawing and appended drawing reference, makes to be familiar with ability
The technology people in domain can implement accordingly after studying this specification carefully.It should be appreciated that specific embodiment described herein is only to solve
The utility model is released, is not used to limit the utility model.
In the description of the present invention, it should be noted that the orientation of the instructions such as term " on ", "horizontal", "inner" or
Positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description,
Rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, because
This should not be understood as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in utility model.
Embodiment: referring to attached drawing 1, a kind of attached cell phone battery capacity detection circuit shown in Fig. 2, including battery of mobile phone E,
One NPN triode Q1, the second NPN triode Q2, NMOS tube Q3, power supply VCC, one U1 of voltage comparator, voltage comparator
Two U2, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th electricity
Hinder R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor
R13, the 14th resistance R14, first capacitor C1, first diode D1, the second diode D2, third diode D3, quartz clock and
Silicon-controlled U3；
Battery of mobile phone E anode and NMOS tube Q3 drain electrode connect, and NMOS tube Q3 source electrode is grounded by first resistor R1, NMOS tube
Q3 grid is connect by 3rd resistor R3 with one U1 output end of voltage comparator, and NMOS tube Q3 grid also passes through second resistance R2 and connects
Ground, NMOS tube Q3 source electrode are connect by the 4th resistance R4 with one U1 inverting input terminal of voltage comparator, and one U1 of voltage comparator is anti-
Phase input terminal is connect with first diode D1 cathode, and first diode D1 anode is connect with two U2 output end of voltage comparator, the
11 one end resistance R11 are connect with power supply VCC, the eleventh resistor R11 other end successively with the 6th resistance R6, the 5th resistance
R5 series connection, and the 6th resistance R6 is connect with the common end of the 5th resistance R5 with one U1 non-inverting input terminal of voltage comparator；
9th one end resistance R9 is connect with battery of mobile phone E anode, and the 9th resistance R9 other end is connected with the tenth resistance R10,
9th resistance R9, the tenth resistance R10 common end connect with two U2 inverting input terminal of voltage comparator, silicon-controlled U3 cathode difference
It is connect with two U2 non-inverting input terminal of voltage comparator, eleventh resistor R11, silicon-controlled U3 plus earth, first capacitor C1 is in parallel
To between silicon-controlled U3 control electrode and ground, two U2 output end of voltage comparator passes sequentially through the 7th resistance R7, the 8th resistance R8 connects
Ground, the 7th resistance R, the 8th resistance R8 common end connect with the first NPN triode Q1 base stage, the first NPN triode Q1 current collection
Pole is connect with the second diode D2 cathode, third diode D3 cathode respectively, the second diode D2 anode and the 9th resistance R9,
The connection of ten common ends resistance R10, third diode D3 anode are connect with the second NPN triode Q2 base stage, the first NPN triode Q1
Emitter ground connection；
The one end twelfth resistor R12 is connect with eleventh resistor R11, and the other end is grounded by thirteenth resistor R13, the
Two NPN triode Q2 base stages are connected to the common end of twelfth resistor R12 Yu thirteenth resistor R13, the second NPN triode Q2 collection
Electrode is connect with power supply VCC, and the second NPN triode Q2 emitter is grounded by the 14th resistance R14, tri- pole the 2nd NPN
Pipe Q2 emitter is also connect with quartz clock anode, quartz clock cathode ground connection.
In the present embodiment, by being discharged by battery E with constant electric current fully charged battery E, pass through quartz clock
Discharge time is recorded, and stops electric discharge when battery E drops to lower voltage limit, discharge current and the product of discharge time are exactly electricity
The capacity of pond E.
Specifically, one U1 of voltage comparator, NMOS tube Q3, first resistor R1, second resistance R2,3rd resistor R3 and the 4th
Resistance R4 forms constant-current source circuit, and one U1 non-inverting input terminal of voltage comparator accesses reference voltage two, and the reference voltage two is by the
Six resistance R6, the 5th resistance R5 and eleventh resistor R11 partial pressure gained, first resistor R1 is the sample resistance of discharge current, is taken
Sample electric current becomes sampling voltage by the 4th resistance R4 and transports to one U1 inverting input terminal of voltage comparator, sets when discharge current reaches
When definite value, one U1 inverting input terminal voltage of voltage comparator is lower than its non-inverting input terminal voltage, one U1 output end of voltage comparator
Voltage increases, and NMOS tube Q3 electric current increases；One U1 inverting input terminal voltage of voltage comparator is higher than its non-inverting input terminal voltage, electricity
One U1 output end voltage of comparator is pressed to reduce, NMOS tube Q3 electric current reduces；This negative-feedback of constant-current source circuit makes NMOS tube Q3's
Electric current is constant.Wherein, setting value is reference voltage two.
Silicon-controlled U3, eleventh resistor R11, first capacitor C1 form reference voltage circuit, produce in the cathode of silicon-controlled U3
Raw reference voltage one, and the reference voltage one is transported into two U2 non-inverting input terminal of voltage comparator, battery of mobile phone E voltage is through the 9th
Resistance R9, the tenth resistance R10 partial pressure, which transports to two U2 inverting input terminal of voltage comparator, under battery E voltage is higher than
When voltage limit, two U2 inverting input terminal voltage of voltage comparator is higher than its non-inverting input terminal voltage, two U2 of voltage comparator output
Low level, the reverse-biased cut-off of first diode D1, the cut-off of the first NPN triode Q1, the second diode D2 cut-off, twelfth resistor
R12 is that the second NPN triode Q2 normally provides conducting electric current, causes to turn it on, and constant-current source circuit works normally, and quartz clock is electricity
Pond E electric discharge recording discharge time；When battery E voltage is lower than lower voltage limit, two U2 inverting input terminal voltage of voltage comparator is low
In its non-inverting input terminal voltage, two U2 of voltage comparator exports high level, and first diode D1 is connected, and one U1 of voltage comparator is anti-
The voltage of phase input terminal improves, and makes it higher than one U1 non-inverting input terminal voltage of voltage comparator, and one U1 of voltage comparator output is low
Level, the low level drag down NMOS tube Q3 grid level, end NMOS tube Q3, and electric discharge stops；The electricity of 7th resistance R7 and the 8th
Resistance R8 partial pressure provides conducting electric current for the first NPN triode Q1, causes the first NPN triode Q1, the first NPN triode Q1 current collection
Pole level is pulled low, and the second diode D2 and third diode D3 is caused to be connected, and the first NPN triode Q1 collector passes through second
Diode D2 pulls down two U2 inverting input terminal voltage of voltage comparator, prevents battery of mobile phone E voltage recovery after stopping discharging from making
Two U2 inverting input terminal of voltage comparator is higher than its non-inverting input terminal, even if two U2 output end of voltage comparator exports always high electricity
It is flat, guarantee that electric discharge will not be waken up because battery of mobile phone E voltage recycles after electric discharge stops；First NPN triode Q1 collector is also
The second NPN triode Q2 base potential is pulled down by third diode D3, causes the second NPN triode Q2 to end, quartz clock
Stop timing, i.e., timing stops while electric discharge stops.Wherein, lower voltage limit, that is, reference voltage one；
Wherein, the model LM358, LM358 of two U2 of one U1 of voltage comparator and voltage comparator is double operational device, can
The peripheral circuit of two U2 of one U1 of voltage comparator and voltage comparator is built, simultaneously convenient for the integrated of integrated circuit.
It preferably, further include that the second capacitor C2, the second capacitor C2 is connected in parallel to the both ends battery of mobile phone E.
In another embodiment, as shown in Fig. 2, the second capacitor C2 is connected in parallel to the both ends battery of mobile phone E, keeps mobile phone electric
Pond E, which can stablize, exports its own voltage to late-class circuit.
It preferably, further include ammeter A, ammeter A anode is connect with battery of mobile phone E anode, ammeter A cathode and NMOS
Pipe Q3 drain electrode connection.
In another embodiment, as shown in Fig. 2, ammeter A can make operator in mobile phone as display device
During battery E discharges, whether detection discharge current is constant, it is ensured that the accuracy of capacity check.
It preferably, further include Light-emitting diode LED, Light-emitting diode LED anode is connect with power supply VCC, and luminous two
Pole pipe LED cathode is connect with the second NPN triode Q2 collector.
In another embodiment, as shown in Fig. 2, Light-emitting diode LED is as the aobvious of battery of mobile phone E discharge process
Show device, when Light-emitting diode LED shines in battery of mobile phone E discharge process, when discharge off, Light-emitting diode LED is extinguished.
The above content is the further descriptions made in conjunction with specific preferred embodiment to the utility model, cannot recognize
Determine specific embodiment of the present utility model to be only limited to these instructions.For the common skill of the utility model technical field
For art personnel, the other embodiments obtained in the case where not departing from the technical solution of the utility model be should be included in practical
In novel protection scope.
Claims (5)
1. a kind of cell phone battery capacity detection circuit, it is characterised in that: including battery of mobile phone, the first NPN triode, the 2nd NPN
Triode, NMOS tube, power supply, voltage comparator one, voltage comparator two, first resistor, second resistance, 3rd resistor,
4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, eleventh resistor,
12 resistance, thirteenth resistor, the 14th resistance, first capacitor, first diode, the second diode, third diode, quartz
Clock and silicon-controlled；
Battery of mobile phone anode and NMOS tube drain electrode connect, and NMOS tube source electrode is grounded by first resistor, and NMOS tube grid passes through the
Three resistance are connect with one output end of voltage comparator, and NMOS tube grid is also grounded by second resistance, and NMOS tube source electrode passes through the
Four resistance are connect with one inverting input terminal of voltage comparator, and one inverting input terminal of voltage comparator and first diode cathode connect
It connecing, first diode anode is connect with two output end of voltage comparator, and eleventh resistor one end is connect with power supply, and the 11st
The resistance other end is successively connected with the 6th resistance, the 5th resistance, and the 6th resistance with the common end of the 5th resistance compared with voltage
The connection of one non-inverting input terminal of device；
9th resistance one end is connect with battery of mobile phone anode, and the 9th resistance other end is connected with the tenth resistance, the 9th resistance, the tenth
The common end of resistance is connect with two inverting input terminal of voltage comparator, silicon-controlled cathode respectively with two homophase input of voltage comparator
End, eleventh resistor connection, silicon-controlled plus earth, first capacitor are connected in parallel between SCR control pole and ground, and voltage compares
Two output end of device passes sequentially through the 7th resistance, the 8th resistance eutral grounding, the 7th resistance, the common end of the 8th resistance and the first NPN tri-
The connection of pole pipe base stage, the first NPN triode collector are connect with the second diode cathode, third diode cathode respectively, and second
Diode cathode is connect with the 9th resistance, the tenth resistance common end, and third diode cathode and the second NPN transistor base connect
It connects, the first NPN triode emitter ground connection；
Twelfth resistor one end is connect with eleventh resistor, and the other end is grounded by thirteenth resistor, the second NPN triode base
Pole is connected to the common end of twelfth resistor and thirteenth resistor, and the second NPN triode collector is connect with power supply, and second
NPN triode emitter is also connect with quartz clock anode by the 14th resistance eutral grounding, the second NPN triode emitter, quartz
Clock cathode ground connection.
2. cell phone battery capacity detection circuit as described in claim 1, it is characterised in that: further include the second capacitor, the second electricity
Appearance is connected in parallel to battery of mobile phone both ends.
3. cell phone battery capacity detection circuit as described in claim 1, it is characterised in that: further include ammeter, ammeter is just
Pole is connect with battery of mobile phone anode, and ammeter cathode and NMOS tube drain electrode connect.
4. cell phone battery capacity detection circuit as described in claim 1, it is characterised in that: further include light emitting diode, shine
Diode cathode is connect with power supply, and light emitting diode cathode is connect with the second NPN triode collector.
5. cell phone battery capacity detection circuit as described in claim 1, it is characterised in that: the voltage comparator one and voltage
The model LM358 of comparator two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822007269.9U CN209356650U (en) | 2018-12-03 | 2018-12-03 | A kind of cell phone battery capacity detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822007269.9U CN209356650U (en) | 2018-12-03 | 2018-12-03 | A kind of cell phone battery capacity detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209356650U true CN209356650U (en) | 2019-09-06 |
Family
ID=67798186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822007269.9U Expired - Fee Related CN209356650U (en) | 2018-12-03 | 2018-12-03 | A kind of cell phone battery capacity detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209356650U (en) |
-
2018
- 2018-12-03 CN CN201822007269.9U patent/CN209356650U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190906 Termination date: 20211203 |
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| CF01 | Termination of patent right due to non-payment of annual fee |