CN108808784A - A kind of zero volt battery charger of protection chip for the charging of binodal lithium battery - Google Patents
A kind of zero volt battery charger of protection chip for the charging of binodal lithium battery Download PDFInfo
- Publication number
- CN108808784A CN108808784A CN201810671213.5A CN201810671213A CN108808784A CN 108808784 A CN108808784 A CN 108808784A CN 201810671213 A CN201810671213 A CN 201810671213A CN 108808784 A CN108808784 A CN 108808784A
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- China
- Prior art keywords
- nmos tube
- resistance
- connection
- zero volt
- lithium battery
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Links
- 230000004224 protection Effects 0.000 title claims abstract description 41
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 37
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 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
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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
A kind of zero volt battery charger of protection chip for the charging of binodal lithium battery; when there is a situation where battery total voltages to be reduced to zero volt; protection chip internal circuits such as benchmark etc. can not work normally, and battery pack logic is abnormal after connecting charger, can not charge to battery pack.The present invention is on the basis of existing binodal charging protective circuit of lithium cell; zero volt battery charger is set, even if battery total voltage can continue charging and use if being reduced to zero volt; the self discharge of effective solution battery causes cell voltage is too low can not continue to charge, the problem of to thrashing.
Description
Technical field
The present invention relates to lithium battery power supply, the zero volt battery of especially a kind of protection chip for the charging of binodal lithium battery
Charging circuit.
Background technology
In recent years, PDA, DSC, CellularPhone, Camcorde, Portable, Audio, Advanced Game,
The use lithium electricity of more and more products such as AssistBicycle, Electric Scooter, Bluetooth Device rapidly
The main power source as it is carried out in pond, trace it to its cause small nothing more than its, energy density is high, memory-less effect, cycle life are high,
The advantages such as cell voltage is high, self-discharge rate is low.But battery itself is there are internal resistance, in addition the power consumption of the protection chip of system, i.e.,
Battery capacity in the case of not being large current discharge is set also constantly to reduce, it is in this case no when battery placement a period of time
Words, cell voltage will be reduced to zero volt, by taking binodal lithium battery as an example, single battery voltage 3.7V, two section total voltage ability 7.4V,
Cell voltage is relatively low, and more easily there is a situation where battery total voltages to be reduced to zero volt in this case, at this time due to battery
Total voltage is zero volt, and chip internal circuits such as benchmark etc. can not work normally, and connects battery charger group logic exception, can not
It opens chip exterior control charging NMOS tube to charge to battery pack, entire battery pack can not just be continuing with, scrap.
Invention content
It can not charge to solve the problem of that binodal lithium battery total voltage is reduced to zero volt system, the present invention provides a kind of use
It is when battery total voltage is reduced to zero volt in the zero volt battery charger of the protection chip of binodal lithium battery charging
System can also be charged with NMOS tube, realize the rising of cell voltage, to make battery pack return normal work state.
In order to achieve the above object, the technical solution adopted by the present invention is：A kind of protection core for the charging of binodal lithium battery
The zero volt battery charger of piece, including lithium battery Battery1, Battery2, resistance R1, R2, R3, capacitance C1, C2, electric discharge
NMOS tube M1, charge control NMOS tube M2 and protection chip IC are controlled, the power port VDD and lithium battery of chip IC are protected
One end of one end and resistance R2 of the voltage monitoring port connection capacitance C2 of Battery2, the other end ground connection of capacitance C2, resistance
The anode of the anode and charger of the other end connection lithium battery Battery2 of R2, protects the lithium battery Battery1's of chip IC
One end of one end and resistance R1 of voltage monitoring port VC connection capacitances C1, the core of the other end connection protection chip IC of capacitance C1
The cathode of piece grounding ports VSS and lithium battery Battery1 and ground connection, the other end connection lithium battery Battery2's of resistance R1
The anode of cathode and lithium battery Battery1 protects the grid of the control of discharge port OD connection NMOS tubes M1 of chip IC, NMOS
The source electrode of pipe M1 is grounded, the drain electrode of the drain electrode connection NMOS tube M2 of NMOS tube M1, the grid connection protection chip IC of NMOS tube M2
Re-charge control port OC, NMOS tube M2 source electrode connection charger cathode simultaneously pass through resistance R3 connections protection chip IC electricity
Stream detection port CS；
It is characterized in that：Setting zero volt battery charger, including PMOS tube PM1, PM2, PM3, NMOS tube NM1, NM2,
Resistance R4, R5, R6；The grid of the grid connection NMOS tube NM1 of PMOS tube PM1 simultaneously connects the logic control inside protection chip IC
Drain electrode connecting resistance R4 one end of signal LOGIC_N, PMOS tube PM1, the grid and NMOS tube NM2 of PMOS tube grid, resistance R4
The other end connects the drain electrode of NMOS tube NM1, and the source electrode of NMOS tube NM1 and the source electrode of NMOS tube NM2 are all connected with protection chip IC
The source electrode of source electrode connection PMOS tube PM2 and the source electrode of PMOS tube PM3 of current detecting port CS, PMOS tube PM1 simultaneously connect vdd terminal
Mouthful, the drain electrode of one end, the one end resistance R6 and PMOS tube PM3 of the drain electrode connection resistance R5 of PMOS tube PM2, the other end of resistance R5
The drain electrode of NMOS tube NM2 is connected, the logic control signal LOGIC_N's inside the grid connection protection chip IC of PMOS tube PM3
Inversion signal LOGIC, the re-charge control port OC of resistance R6 other ends connection protection chip IC.
The minimum rated voltage of the charger is more than PMOS tube PM1, PM2, PM3 and NMOS tube NM1, NM2 and NMOS
The threshold voltage of pipe M1, M2.
Zero volt battery charger can be integrated in protection chip IC, the protection with zero volt battery charging function is made
Chip IC.
The invention has the advantages that and advantageous effect：In the application of two section lithium electricity charge protections, even if battery total voltage
Be reduced to zero volt, if being equipped with zero volt battery charger, system can also continue charging and use, effective solution battery from
Electric discharge causes cell voltage is too low can not continue to charge, thus the problem of thrashing.
Description of the drawings
Fig. 1 is that the prior art two saves lithium electric protection system application drawing；
Fig. 2 is zero volt battery charger figure of the present invention；
Fig. 3 is the charging curve of no zero volt charge function；
Fig. 4 is the charging curve for having zero volt charge function.
Specific implementation mode
As shown in Figure 1, known binodal lithium battery charging circuit includes lithium battery Battery1, Battery2, resistance R1,
R2, R3, capacitance C1, C2, NMOS tube M1, M2 and protection chip IC (FS3332), protect VDD (chip power, the battery of chip IC
2 voltage monitoring terminals) port connection capacitance C2 one end and resistance R2 one end, the other end ground connection of capacitance C2, resistance R2's
The other end connects the anode of the positive PB+ and charger of lithium battery Battery2, protects VC (1 voltage monitorings of battery of chip IC
Terminal) port connection capacitance C1 one end and resistance R1 one end, the VSS (cores of the other end connection protection chip IC of capacitance C1
Piece ground terminal) port and lithium battery Battery1 cathode and ground connection, the other end connection lithium battery Battery2 of resistance R1
Cathode and lithium battery Battery1 anode, protect OD (control of discharge terminal) port of chip IC to connect the grid of NMOS tube M1
Pole (poles G), source electrode (poles the S) ground connection of NMOS tube M1, the drain electrode (poles D) of drain electrode (poles D) the connection NMOS tube M2 of NMOS tube M1,
OC (charge control terminal) port of grid (poles D) the connection protection chip IC of NMOS tube M2, the source electrode (poles S) of NMOS tube M2
The cathode of PB- connection chargers and CS (current sense terminal) port that chip IC is protected by resistance R3 connections.
As shown in Fig. 2, the present invention is on the basis of Fig. 1, zero volt battery charger is set, including PMOS tube PM1, PM2,
PM3, NMOS tube NM1, NM2, resistance R4, R5, R6；The grid of the grid connection NMOS tube NM1 of PMOS tube PM1 simultaneously connects protection core
One end drain electrode connecting resistance R4 of logic control signal LOGIC_N inside piece IC, PMOS tube PM1, the grid and NMOS of PMOS tube
The grid of pipe NM2, the resistance R4 other ends connect the drain electrode of NMOS tube NM1, the source level of the source electrode and NMOS tube NM2 of NMOS tube NM1
It is all connected with the ports CS of protection chip IC, the source electrode of the source electrode and PMOS tube PM3 of the source electrode connection PMOS tube PM2 of PMOS tube PM1
And VDD is connected, and the drain electrode of one end, the one end resistance R6 and PMOS tube PM3 of the drain electrode connection resistance R5 of PMOS tube PM2, resistance R5
Other end connection NMOS tube NM2 drain electrode, the logic control signal inside the grid connection protection chip IC of PMOS tube PM3
The inversion signal LOGIC of LOGIC_N, the ports OC of resistance R6 other ends connection protection chip IC.Can charge zero volt battery electricity
Road is integrated in protection chip IC, and the protection chip IC with zero volt battery charging function is made.
The operation principle of the present invention：As shown in Figure 1, when lithium battery is in normal condition, such as VSS=0V, VC=3.7V,
VDD=7.4V, the OC outputs of charge control terminal are vdd voltage 7.4V, and control of discharge terminal OD output voltages are vdd voltage
7.4V, control of discharge NMOS tube M1 and the M2 conductings of charge control NMOS tube, system can be charged normal and be discharged at this time.Such as figure
Shown in 1, when cell voltage is reduced due to load discharge, for example (,) VSS=0V, VC=2.0V, VDD=4.0V, charge control end
Sub- OC outputs are vdd voltage 4.0V, and control of discharge terminal OD output voltages are VSS voltage 0V, at this time control of discharge NMOS tube M1
Cut-off, charge control NMOS tube M2 conducting, battery pack cannot discharge at this time, and connection charger is chargeable, and charging current is from M1 bodies
Diode flows through.As shown in Figure 1, when cell voltage is reduced due to self-discharge of battery, such as VSS=0V, VC=0V, VDD=
0V, due to not having zero volt battery charger, the OC outputs of charge control terminal are PB- voltage -12V (charger voltage 12V),
Control of discharge terminal OD output voltages are VSS voltage 0V, and control of discharge NMOS tube M1 ends at this time, and charge control NMOS tube M2 is cut
Only, the charger of battery pack connection at this time can not continue to charge.
As shown in Fig. 2, provided with after zero volt battery charger, when cell voltage is reduced due to self-discharge of battery, example
Such as VSS=0V, VC=0V, VDD=0V, connection charger PB- current potentials are -12V (charger voltage 12V), CS current potentials and PB-
Identical is also -12V, and in zero volt battery charger, the current potential of LOGIC, LOGIC_N and VDD are all zero volt, PMOS tube at this time
PM3 ends, PMOS PM1 cut-offs, NMOS tube NM1 conductings, and PM2, NM2 grid potential are CS current potentials (- 12V), PM2 conductings, NM2
Cut-off, charge control leading-out terminal OC current potentials are VDD current potentials, and NMOS tube M2 source potentials are PB- current potentials (- 12V), grid potential
For VDD current potentials (0V), M2 conductings, control of discharge NMOS tube M1 source potentials are zero volt, and grid potential is also zero volt, and M1 ends,
Charging current can be flowed through from M1 body diodes at this time, and charger can charge the battery, until to rise to IC normal for cell voltage
When operating voltage, control of discharge terminal OD output high level is VDD current potentials, and M1 is connected, and system enters the charging mould under normal state
Formula.
It should be noted, to ensure the normal of zero volt battery functi on, the minimum rated voltage of selected charger should be greater than
The threshold voltage of metal-oxide-semiconductor PM1, PM2, PM3, NM1, NM2 and NMOS tube M1, M2.
As shown in figure 3, being no zero volt battery charging function charging curve, abscissa is the charging time, and ordinate is electricity
Pond total voltage, when cell voltage is zero volt, with the increase in charging time, cell voltage can not increase or be zero volt, electricity
Pond group can not continue electric discharge and use.
As shown in figure 4, to there is zero volt battery charging function charging curve, with the increase in charging time, cell voltage by
Edge up height, until reaching system charge cutoff voltage, disconnection charger connection load can continue electric discharge and use.
Claims (3)
1. a kind of zero volt battery charger of protection chip for the charging of binodal lithium battery, including lithium battery Battery1,
Battery2, resistance R1, R2, R3, capacitance C1, C2, control of discharge NMOS tube M1, charge control NMOS tube M2 and protection chip
IC, protect the voltage monitoring port of the power port VDD and lithium battery Battery2 of chip IC connect capacitance C2 one end and
One end of resistance R2, the other end ground connection of capacitance C2, the anode of the other end connection lithium battery Battery2 of resistance R2 and charging
The anode of device protects one end and the resistance R1 of the voltage monitoring port VC connection capacitances C1 of the lithium battery Battery1 of chip IC
One end, the cathode of the chip ground port VSS and lithium battery Battery1 of the other end connection protection chip IC of capacitance C1 simultaneously connect
Ground, the anode of the cathode and lithium battery Battery1 of the other end connection lithium battery Battery2 of resistance R1, protects chip IC
The grid of control of discharge port OD connection NMOS tubes M1, the source electrode ground connection of NMOS tube M1, the drain electrode of NMOS tube M1 connect NMOS tube
The drain electrode of M2, the re-charge control port OC of the grid connection protection chip IC of NMOS tube M2, the source electrode connection charging of NMOS tube M2
The cathode of device and the current detecting port CS that chip IC is protected by resistance R3 connections；
It is characterized in that：Zero volt battery charger, including PMOS tube PM1, PM2, PM3, NMOS tube NM1, NM2, resistance are set
R4,R5,R6；The grid of the grid connection NMOS tube NM1 of PMOS tube PM1 simultaneously connects the logic control signal inside protection chip IC
Drain electrode connecting resistance R4 one end of LOGIC_N, PMOS tube PM1, the grid and NMOS tube NM2 of PMOS tube grid, resistance R4 is another
The drain electrode of end connection NMOS tube NM1, the source electrode of NMOS tube NM1 and the source electrode of NMOS tube NM2 are all connected with the electric current of protection chip IC
Port CS is detected, the source electrode of source electrode connection PMOS tube PM2 and the source electrode of PMOS tube PM3 of PMOS tube PM1 simultaneously connect vdd terminal mouth,
The drain electrode of one end, the one end resistance R6 and PMOS tube PM3 of the drain electrode connection resistance R5 of PMOS tube PM2, the other end of resistance R5 connect
The drain electrode of NMOS tube NM2 is connect, the logic control signal LOGIC_N's inside the grid connection protection chip IC of PMOS tube PM3 is anti-
Phase signals LOGIC, the re-charge control port OC of resistance R6 other ends connection protection chip IC.
2. the zero volt battery charger of the protection chip according to claim 1 for the charging of binodal lithium battery, special
Sign is：The minimum rated voltage of the charger is more than PMOS tube PM1, PM2, PM3 and NMOS tube NM1, NM2 and NMOS tube
The threshold voltage of M1, M2.
3. the zero volt battery charger of the protection chip according to claim 1 or 2 for the charging of binodal lithium battery,
It is characterized in that：Zero volt battery charger is integrated in protection chip IC, the protection with zero volt battery charging function is made
Chip IC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810671213.5A CN108808784A (en) | 2018-06-26 | 2018-06-26 | A kind of zero volt battery charger of protection chip for the charging of binodal lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810671213.5A CN108808784A (en) | 2018-06-26 | 2018-06-26 | A kind of zero volt battery charger of protection chip for the charging of binodal lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108808784A true CN108808784A (en) | 2018-11-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810671213.5A Pending CN108808784A (en) | 2018-06-26 | 2018-06-26 | A kind of zero volt battery charger of protection chip for the charging of binodal lithium battery |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10225007A (en) * | 1997-02-04 | 1998-08-21 | Seiko Instr Inc | Charging type power supply device |
| CN1909325A (en) * | 2005-08-01 | 2007-02-07 | 三洋电机株式会社 | Battery pack with circuit protection function |
| CN103178499A (en) * | 2013-03-08 | 2013-06-26 | 深圳市富满电子有限公司 | Rechargeable battery protection circuit with zero-volt recharge function |
| CN103384076A (en) * | 2013-07-18 | 2013-11-06 | 中船重工鹏力（南京）新能源科技有限公司 | Zero-v charging circuit for lithium battery protection and working method thereof |
| CN204205656U (en) * | 2014-11-10 | 2015-03-11 | 东莞启益电器机械有限公司 | No-voltage works the battery charger filled |
| CN207021748U (en) * | 2017-07-19 | 2018-02-16 | 东莞启益电器机械有限公司 | No-voltage acts the battery charger filled |
| CN207368709U (en) * | 2017-10-27 | 2018-05-15 | 周成坤 | A kind of battery 0V chargings and battery protection system |
-
2018
- 2018-06-26 CN CN201810671213.5A patent/CN108808784A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10225007A (en) * | 1997-02-04 | 1998-08-21 | Seiko Instr Inc | Charging type power supply device |
| CN1909325A (en) * | 2005-08-01 | 2007-02-07 | 三洋电机株式会社 | Battery pack with circuit protection function |
| CN103178499A (en) * | 2013-03-08 | 2013-06-26 | 深圳市富满电子有限公司 | Rechargeable battery protection circuit with zero-volt recharge function |
| CN103384076A (en) * | 2013-07-18 | 2013-11-06 | 中船重工鹏力（南京）新能源科技有限公司 | Zero-v charging circuit for lithium battery protection and working method thereof |
| CN204205656U (en) * | 2014-11-10 | 2015-03-11 | 东莞启益电器机械有限公司 | No-voltage works the battery charger filled |
| CN207021748U (en) * | 2017-07-19 | 2018-02-16 | 东莞启益电器机械有限公司 | No-voltage acts the battery charger filled |
| CN207368709U (en) * | 2017-10-27 | 2018-05-15 | 周成坤 | A kind of battery 0V chargings and battery protection system |
Non-Patent Citations (1)
| Title |
|---|
| JOHN E.AYERS著: "《数字集成电路分析与设计 第2版》", 31 March 2013 * |
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| PB01 | Publication | ||
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Application publication date: 20181113 |