CN108233482A - It is a kind of to be used to detect battery capacity, the Talkabout charger to battery pack charge balancing - Google Patents
It is a kind of to be used to detect battery capacity, the Talkabout charger to battery pack charge balancing Download PDFInfo
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- CN108233482A CN108233482A CN201810125171.5A CN201810125171A CN108233482A CN 108233482 A CN108233482 A CN 108233482A CN 201810125171 A CN201810125171 A CN 201810125171A CN 108233482 A CN108233482 A CN 108233482A
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- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000005669 field effect Effects 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 5
- MKGHDZIEKZPBCZ-ULQPCXBYSA-N methyl (2s,3s,4r,5r,6r)-4,5,6-trihydroxy-3-methoxyoxane-2-carboxylate Chemical compound CO[C@H]1[C@H](O)[C@@H](O)[C@H](O)O[C@@H]1C(=O)OC MKGHDZIEKZPBCZ-ULQPCXBYSA-N 0.000 claims 8
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
-
- H02J7/0021—
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- H02J7/008—
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- H02J7/0091—
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
Present invention offer is a kind of for detecting battery capacity, the Talkabout charger to battery pack charge balancing, and the Talkabout charger includes the MCU with pin AD1, pin AD2, pin AD3, pin AD4, pin VC1, pin VC2 and pin PWM；MCU detects the voltage of battery pack by pin AD2, resistance R14 and resistance R15；MCU detects the voltage of single battery in battery pack by AD2, resistance R14 and resistance R15 and pin AD1, resistance R12 and resistance R13 respectively；The pulsewidth and triode Q2 of MCU controlling switch PWM, triode Q1 are charged the battery；Pin AD4 detection charging currents are sent to after amplification of checking the mark is made of resistance R1 and amplifier U1B.The Talkabout charger energy easy detection battery capacity of the present invention, the Talkabout charger to battery pack charge balancing and quick charge.
Description
Technical field
The present invention relates to charger technologies field, specifically, being related to one kind for detecting battery capacity, battery pack being filled
The Talkabout charger of electrical equalization.
Background technology
The lithium battery of intercom of the transmission power more than more than 2W is usually the battery being connected in series by 2 single lithium batteries
Group, after a period of time, the parameters such as the internal resistance of cell, voltage, capacity generate fluctuation, form inconsistent state, will produce
Raw such or such difference.This species diversity is presented as voltage when battery pack is full of or discharges between series-connected cell core not phase
Together.In this case during leading to battery pack charging, the battery of overtension triggers battery pack overcharge protection ahead of time,
And the battery of brownout leads to battery pack in discharge process, so as to make the whole volume of battery pack apparent
Decline, when the capacity of the entire reflected capacity of the battery pack battery worst for performance in battery pack is so as to reduce power supply
Between, and using when be easy to overcharge and cross and put phenomenon, and be not easy to find, lead to battery pack premature failure.
Invention content
In place of solving above-mentioned the deficiencies in the prior art, hold the purpose of the present invention is to provide one kind for detecting battery
Amount, to the Talkabout charger of battery pack charge balancing, the defects of to overcome in the prior art.
To achieve these goals, the present invention provides a kind of for detecting battery capacity, to battery pack charge balancing
Talkabout charger, the Talkabout charger connect with the battery pack being connected in series by the first battery BT1 and the second battery BT2
It connects, the positive terminal of the first battery BT1 sets the first charging input end, and connection is set between the first battery BT1 and the second battery BT2
End, the negative pole end of the second battery BT2 set the second charging input end, and the battery pack is additionally provided with thermistor end；Wherein, institute
It states Talkabout charger and includes that there is pin AD1, pin AD2, pin AD3, pin AD4, pin VC1, pin VC2 and pin
The MCU of PWM；Pin AD1 is connect respectively with resistance R12 and resistance R13, resistance R13 ground connection, the connection of resistance R12 and battery pack
End connection；Pin AD2 is connect respectively with resistance R14 and resistance R15, and resistance R14 is connect with the first charging input end, resistance R15
It is connect with the second charging input end and resistance R15 is grounded；Pin AD2 is connected, for detecting the voltage of battery pack；Pin AD1 and
Pin AD2 is connected, for detecting the voltage of single battery in battery pack.
Pin PWM successively with resistance R7, resistance R6, resistance R5, the base stage of triode Q2, triode Q1, resistance R1 and 9V
Power supply connects, for charging to battery pack.Wherein, capacitance C2 is accessed between resistance R7 and resistance R6 and capacitance C2 is grounded,
Capacitance C1 is accessed between resistance R6 and resistance R5 and capacitance C1 is grounded, resistance R5 is connect with the base stage of triode Q2, triode Q2
Emitter ground connection, the collector of triode Q2 connect with the base stage of triode Q1, emitter and resistance the R1 company of triode Q1
It connects, resistance R1 is connect with 9V power supplys, and the collector of triode Q1 is connect with the first charging input end 1.
Resistance R1 is connect successively with amplifier U1B and pin AD4, for detecting the charging current of battery pack.Wherein, resistance R1
Input terminal be sequentially ingressed into resistance R2, resistance R18, resistance R18 ground connection, lead-out wire accesses amplifier between resistance R2 and resistance R18
The noninverting input of U1B；Resistance R1 is connect with resistance R3, and resistance R3 is connect with resistance R4, the output of resistance R4 access amplifiers U1B
End；The reverse input end of resistance R3 access amplifiers U1B, the output terminal access pin AD4 of amplifier U1B.
Pin VC1 connects successively with resistance R8, triode Q3, field-effect tube Q4, resistance R10 and the first charging input end end
It connects, for reducing the charging current to the first battery BT1.Wherein, resistance R8 is connect with the base stage of triode Q3, triode Q3's
Emitter is grounded, and the collector of triode Q3 is connect with resistance R9 and field-effect tube Q4,1 end of resistance R9 and the first charging input end
Connection, field-effect tube Q4 are connect with resistance R10 and connecting pin 2, and resistance R10 is connect with 1 end of the first charging input end.Pin VC 2
It is connect successively with field-effect tube Q5, resistance R11 and connecting pin connects, for reducing the charging current to the second battery BT2.
Second charging input end is connect successively with thermistor NTC and thermistor end, thermistor end respectively with pin
AD3, resistance R17 are connected with resistance R16, for detecting the temperature in battery pack.Wherein, resistance R17 is grounded, and resistance R16 connects electricity
Source VCC.
As the further explanation to Talkabout charger of the present invention, it is preferable that pin AD1 and pin AD2 are led
It is logical, when MCU detects that the voltage of the batteries in the first battery BT1 and the second battery BT2 reaches 4.15V, and than another
During one economize on electricity high more than the 50mV of cell voltage, start battery balanced.
As the further explanation to Talkabout charger of the present invention, it is preferable that as the first battery BT1 and second
When the voltage difference of battery BT2 is less than 20mV, MCU controlling switch VC1 closes field-effect tube Q4, to stop battery balanced and restore just
Often charging.
As the further explanation to Talkabout charger of the present invention, it is preferable that pin AD2 is connected, when MCU is examined
When measuring the voltage of battery pack less than 6.2V, the Talkabout charger uses 50mA current versus cells group into line precharge.
As the further explanation to Talkabout charger of the present invention, it is preferable that pin AD2 is connected, when MCU is examined
When measuring the voltage of battery pack in the range of 6.2V-8.3V, the Talkabout charger is carried out using 800mA current versus cells group
High current constant-current charge.
As the further explanation to Talkabout charger of the present invention, it is preferable that pin AD2 is connected, when MCU is examined
When measuring the voltage of battery pack higher than 8.4V, the Talkabout charger uses constant-voltage charge, charging voltage 8.4V.
As the further explanation to Talkabout charger of the present invention, it is preferable that pin AD2 is connected, when MCU is examined
When the voltage of survey battery pack is down to 7.8V, the Talkabout charger will recharge battery pack.
As the further explanation to Talkabout charger of the present invention, it is preferable that pin AD3 is connected, MCU detections
In the temperature of charging process battery pack, stop charging when the temperature of battery pack is more than or equal to 45 DEG C, when temperature is less than 43 DEG C
It recharges.
The Talkabout charger energy easy detection battery capacity of the present invention, pair to battery pack charge balancing and quick charge
It says machine charger, avoids the battery pack Problem of Failure as caused by overcharge and overdischarge.
Description of the drawings
Fig. 1 is the circuit diagram of the Talkabout charger of the present invention.
Specific embodiment
It is attached in conjunction with appended preferred embodiment in order to further appreciate that structure, feature and the other purposes of the present invention
With attached drawing, detailed description are as follows, this attached drawing embodiment described is merely to illustrate technical scheme of the present invention, and non-limiting
Invention.
As shown in FIG. 1, FIG. 1 is the circuit diagrams of the Talkabout charger of the present invention；The Talkabout charger with by first
The battery pack connection that battery BT1 and the second battery BT2 are connected in series, positive terminal setting the first charging input of the first battery BT1
End 1, sets connecting pin 2 between the first battery BT1 and the second battery BT2, the second charging of negative pole end setting of the second battery BT2 is defeated
Enter end 3, the battery pack is additionally provided with thermistor end 4；Wherein, the Talkabout charger is included with pin AD1, pin
AD2, pin AD3, pin AD4, pin VC1, pin VC2 and pin PWM MCU5.
Pin AD1 is connect respectively with resistance R12 and resistance R13, resistance R13 ground connection, the connecting pin of resistance R12 and battery pack
2 connections；Pin AD2 is connect respectively with resistance R14 and resistance R15, and resistance R14 is connect with the first charging input end 1, resistance R15
It is connect with the second charging input end 3 and resistance R15 is grounded；Pin AD2 is connected, for detecting the voltage of battery pack；Pin AD1 and
Pin AD2 is connected, for detecting the voltage of single battery in battery pack.
Pin PWM successively with resistance R7, resistance R6, resistance R5, the base stage of triode Q2, triode Q1, resistance R1 and 9V
Power supply connects, for charging to battery pack；Wherein, capacitance C2 is accessed between resistance R7 and resistance R6 and capacitance C2 is grounded,
Capacitance C1 is accessed between resistance R6 and resistance R5 and capacitance C1 is grounded, resistance R5 is connect with the base stage of triode Q2, triode Q2
Emitter ground connection, the collector of triode Q2 connect with the base stage of triode Q1, emitter and resistance the R1 company of triode Q1
It connects, resistance R1 is connect with 9V power supplys, and the collector of triode Q1 is connect with the first charging input end 1.
Resistance R1 is connect successively with amplifier U1B and pin AD4, for detecting the charging current of battery pack；Wherein, resistance R1
Input terminal be sequentially ingressed into resistance R2, resistance R18, resistance R18 ground connection, lead-out wire accesses amplifier between resistance R2 and resistance R18
The noninverting input of U1B；Resistance R1 is connect with resistance R3, and resistance R3 is connect with resistance R4, the output of resistance R4 access amplifiers U1B
End；The reverse input end of resistance R3 access amplifiers U1B, the output terminal access pin AD4 of amplifier U1B.
Pin VC1 connects successively with resistance R8, triode Q3, field-effect tube Q4, resistance R10 and 1 end of the first charging input end
It connects, for reducing the charging current to the first battery BT1；Wherein, resistance R8 is connect with the base stage of triode Q3, triode Q3's
Emitter is grounded, and the collector of triode Q3 is connect with resistance R9 and field-effect tube Q4,1 end of resistance R9 and the first charging input end
Connection, field-effect tube Q4 are connect with resistance R10 and connecting pin 2, and resistance R10 is connect with 1 end of the first charging input end.Pin VC 2
It is connect successively with field-effect tube Q5, resistance R11 and connecting pin 2 connects, field-effect tube Q5 ground connection, for reducing to the second battery
The charging current of BT2.
Second charging input end 3 is connect successively with thermistor NTC and thermistor end 4, and thermistor end 4 is respectively with drawing
Foot AD3, resistance R17 are connected with resistance R16, and for detecting the temperature in battery pack, resistance R17 ground connection, resistance R16 connects power supply
VCC。
Detect battery capacity
When walkie-talkie is inserted into cradle, MCU detects battery pack by pin AD2, resistance R14 and resistance R15
Voltage, the pulsewidth and triode Q2 of controlling switch PWM, triode Q1 are charged the battery, by current sampling resistor R1 and fortune
Put U1B form differential amplification after be sent to MCU pin AD4 detection charging current, pass through MCU Software Integrations charging current and time
Variation and internal resistance value in conjunction with cell voltage judge whether battery capacity becomes smaller roughly, when battery capacity is less than originally
Judge that cell degradation must be replaced when 70%.
Charge balancing
MCU is each single by pin AD2, resistance R14, resistance R15 and pin AD1, resistance R12, resistance R13 detections respectively
The voltage of batteries, when MCU5 detects that the voltage of the batteries in the first battery BT1 and the second battery BT2 reaches 4.15V
When, and during 50mV more than higher than another economize on electricity cell voltage, start battery balanced.
When the first battery BT1 cell voltages exceed more than 50mV than the second battery BT2 batteries.MCU by pin VC1,
Triode Q3 control field-effect tube Q4 conductings, make charging current be diverted to resistance R10 and field-effect tube Q4, reduce to the first battery
The charging current of BT1 stops balanced field of closing when the voltage difference of the first battery BT1 and the second battery BT2 are less than 20mV and imitates
Should pipe Q4, then charge normal.Likewise, when the second battery BT2 cell voltages exceed more than 50mV than the first battery BT1 batteries
When.MCU controls field-effect tube Q5 conductings by pin VC2, and charging current is made to be diverted to resistance R11 and field-effect tube Q5, reduces
To the charging current of the second battery BT2, stop when the voltage difference of the first battery BT1 and the second battery BT2 are less than 20mV balanced
Field-effect tube Q5 is closed, is then charged normal.Charge balancing make each single battery can full capacity charging, battery pack can be made
Extend supplying power for outside.
Quick charge
MCU detects the voltage of battery pack, the pulsewidth of controlling switch PWM and three by pin AD2, resistance R14 and resistance R15
Pole pipe Q2, triode Q1 control the charging current and voltage of battery, and differential amplification is formed by current sampling resistor R1 and amplifier U1B
It is sent to the pin AD4 detection charging currents of MCU afterwards.
Charging process is divided into three phases constant current precharge, high current constant-current charge and constant-voltage charge.When cell voltage is low
When 6.2V, charger can use 50mA current versus cells group to be used into line precharge when cell voltage is in 6.2V to 8.3V
800mA current versus cells group carries out high current constant-current charge, when cell voltage is raised to 8.4V, is changed to constant-voltage charge, keeps charging
Voltage is 8.4V.At this point, charging current is gradually reduced, when electric current drops to 50mA, charging terminates.As battery voltage is down to
It will be recharged during 7.8V.
In the temperature of charging process detection battery pack, stop charging when temperature is increased to 45 DEG C, when temperature is less than 43 DEG C
When recharge.MCU detects battery pack by thermistor NTC, resistance R16, resistance R17 and the pin AD3 in battery pack
Interior temperature.
MCU further includes serial ports RXD, TXD and can communicate with battery management system, and battery management system can set each fill
The charging current and voltage in electric stage, inquiry battery current electric quantity etc..
It is to be understood that foregoing invention content and specific embodiment are intended to prove technical solution provided by the present invention
Practical application should not be construed as limiting the scope of the present invention.Those skilled in the art are in spirit and principles of the present invention
It is interior, when can various modifications may be made, equivalent replacement or improvement.Protection scope of the present invention is subject to the appended claims.
Claims (8)
1. a kind of be used to detect battery capacity, the Talkabout charger to battery pack charge balancing, which is characterized in that the intercommunication
Machine charger is connect with the battery pack being connected in series by the first battery BT1 and the second battery BT2, the positive terminal of the first battery BT1
First charging input end (1) is set, connecting pin (2) are set between the first battery BT1 and the second battery BT2, the second battery BT2's
Negative pole end sets the second charging input end (3), and the battery pack is additionally provided with thermistor end (4)；Wherein,
The Talkabout charger include with pin AD1, pin AD2, pin AD3, pin AD4, pin VC1, pin VC2 and
The MCU (5) of pin PWM；
Pin AD1 is connect respectively with resistance R12 and resistance R13, connecting pin (2) connection of resistance R12 and battery pack；Pin AD2
It is connect respectively with resistance R14 and resistance R15, resistance R14 is connect with the first charging input end (1), and resistance R15 and the second charging are defeated
Enter end (3) connection；Pin AD2 is connected, for detecting the voltage of battery pack；Pin AD1 and pin AD2 conductings, for detecting electricity
The voltage of single battery in the group of pond；
Pin PWM successively with resistance R7, resistance R6, resistance R5, the base stage of triode Q2, triode Q1, resistance R1 and 9V power supply
Connection, for charging to battery pack；Resistance R1 is connect successively with amplifier U1B and pin AD4, for detecting filling for battery pack
Electric current；
Pin VC1 holds with resistance R8, triode Q3, field-effect tube Q4, resistance R10 and the first charging input end (1) connect successively,
For reducing the charging current to the first battery BT1；
Pin VC 2 successively with field-effect tube Q5, resistance R11 is connect and connecting pin (2) connect, for reduce to the second battery BT2
Charging current；
Second charging input end (3) is connect successively with thermistor NTC and thermistor end (4), thermistor end (4) respectively with
Pin AD3, resistance R17 are connected with resistance R16, for detecting the temperature in battery pack.
2. Talkabout charger as described in claim 1, which is characterized in that pin AD1 and pin AD2 conductings, when MCU (5)
When detecting that the voltage of the first battery BT1 and the batteries in the second battery BT2 reaches 4.15V, and than another batteries
During high more than the 50mV of voltage, start battery balanced.
3. Talkabout charger as claimed in claim 2, which is characterized in that as the first battery BT1 and the electricity of the second battery BT2
When pressure difference is less than 20mV, MCU (5) controlling switch VC1 closes field-effect tube Q4, to stop battery balanced and restore to charge normal.
4. Talkabout charger as described in claim 1, which is characterized in that pin AD2 is connected, when MCU (5) detects battery
When the voltage of group is less than 6.2V, the Talkabout charger uses 50mA current versus cells group into line precharge.
5. Talkabout charger as described in claim 1, which is characterized in that pin AD2 is connected, when MCU (5) detects battery
When the voltage of group is in the range of 6.2V-8.3V, the Talkabout charger carries out high current perseverance using 800mA current versus cells group
Current charge.
6. Talkabout charger as described in claim 1, which is characterized in that pin AD2 is connected, when MCU (5) detects battery
When the voltage of group is higher than 8.4V, the Talkabout charger uses constant-voltage charge, charging voltage 8.4V.
7. Talkabout charger as claimed in claim 6, which is characterized in that pin AD2 is connected, when MCU (5) detects battery pack
Voltage when being down to 7.8V, the Talkabout charger will recharge battery pack.
8. Talkabout charger as described in claim 1, which is characterized in that pin AD3 is connected, and MCU (5) detections were being charged
The temperature of journey battery pack stops charging when the temperature of battery pack is more than or equal to 45 DEG C, is recharged when temperature is less than 43 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810125171.5A CN108233482B (en) | 2018-02-08 | 2018-02-08 | Interphone charger for detecting battery capacity and balancing charging of battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810125171.5A CN108233482B (en) | 2018-02-08 | 2018-02-08 | Interphone charger for detecting battery capacity and balancing charging of battery pack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108233482A true CN108233482A (en) | 2018-06-29 |
| CN108233482B CN108233482B (en) | 2023-11-07 |
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ID=62670942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810125171.5A Active CN108233482B (en) | 2018-02-08 | 2018-02-08 | Interphone charger for detecting battery capacity and balancing charging of battery pack |
Country Status (1)
| Country | Link |
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| CN (1) | CN108233482B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282185A (en) * | 2018-02-08 | 2018-07-13 | 福建省万华电子科技有限公司 | A kind of control circuit for transmitting intercommunication machine information by charger seat |
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2018
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| CN108282185A (en) * | 2018-02-08 | 2018-07-13 | 福建省万华电子科技有限公司 | A kind of control circuit for transmitting intercommunication machine information by charger seat |
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| Publication number | Publication date |
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| CN108233482B (en) | 2023-11-07 |
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