CN102170117B - Battery protecting device and protecting method - Google Patents
Battery protecting device and protecting method Download PDFInfo
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- CN102170117B CN102170117B CN201110107490.1A CN201110107490A CN102170117B CN 102170117 B CN102170117 B CN 102170117B CN 201110107490 A CN201110107490 A CN 201110107490A CN 102170117 B CN102170117 B CN 102170117B
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Abstract
The invention relates to a battery protecting device, comprising a charge-discharge control logic device, a feedback end and a discharge control unit, wherein one output end of the charge-discharge control logic device is connected with the grid electrode of a first MOS (metal oxide semiconductor) tube, and the other output end of the charge-discharge control logic device is connected with the grid electrode of a second MOS tube; the source electrode of the first MOS tube is connected with the earth, the drain electrode of the first MOS tube is connected with the source electrode of the second MOS tube, and the drain electrode of the second MOS tube is connected with the negative electrode of a discharge port; one end of the discharge control unit is connected with the feedback end, and one end of the discharge control unit is connected with the discharge port; the feedback end is used for obtaining a feedback voltage when a battery is connected with a load; the discharge control unit is used for controlling a discharge switching tube to delay breakover when the feedback voltage is obtained in the feedback section; and a breakover electric resistance of the discharge switching tube is changed from high to low, so that a battery discharge current is applied to the load. The invention also provides a battery protecting method. With the device and the method, a transient heavy current is effectively restrained, and the accident of striking a light to hurt a person is avoided, so that the safety of using the battery is enhanced.
Description
Technical field
The present invention relates to electronic circuit field, particularly a kind of battery protecting apparatus and guard method.
Background technology
General chargeable battery protection scheme is that battery core voltage is exported to load by charge switch and the discharge switch of two serial connections; if in the scope that battery core voltage is set at battery protection chip; charge switch and discharge switch are opened always, can outwards export large electric current at any time.Because the pole piece of battery is exposed in air, easily by extraneous conductive body, touched, when between the electric discharge output positive and negative plate of battery, there is conductor short circuit, there is High-current output battery moment, produces therefrom pole piece sparking, easily the accident of initiation fire or scald.
Chargeable battery is used on hand-held electrical equipment, and while changing battery, due to the charging of battery to electric appliance circuits electric capacity, battery pole piece has large current flowing at powered on moment, occurs pole piece sparking carbonization.After repeatedly changing the sparking carbonization that battery produces, battery pole piece loose contact, must maintenance or change battery pole piece, and electrical equipment could normal power supply, affects the reliability of battery and electrical equipment.
At present, overcurrent protection majority is first output current to be converted to voltage to sample, and by sampled voltage and predefined reference voltage comparison, adjusts the operating state of battery discharge switching tube according to comparative result, reaches the object that changes output current.But due to the delayed action of current controlled circuit, for the fast-changing large electric current of output, when Current limited Control starts to move, the actual output current of battery has exceeded predefined Limited Current value.Within this period of time of delay, instantaneous large-current may cause the accident fast.
Referring to Fig. 1, existing battery protecting apparatus is shown, comprise and discharge and recharge control logic device U1 and voltage comparator U2, voltage comparator U2 mono-input access reference voltage V ref, another input connects battery discharge port negative pole P-by resistance R S, discharge and recharge the grid that control logic device U1 mono-output connects electric discharge metal-oxide-semiconductor Q1, another output connects the grid of charging metal-oxide-semiconductor Q2; The electric discharge metal-oxide-semiconductor Q1 source electrode utmost point connects the negative pole of battery core, and drain electrode connects the source electrode of charging metal-oxide-semiconductor Q2, and the drain electrode of charging metal-oxide-semiconductor Q2 connects electric discharge port negative pole P-.Electric discharge metal-oxide-semiconductor Q1 controlled discharge, charging metal-oxide-semiconductor Q2 controls charging.
Under normal circumstances, electric discharge metal-oxide-semiconductor Q1, charging metal-oxide-semiconductor Q2 is in conducting state, during conducting, there is certain conducting resistance Rds (on), as the anodal P+ of battery discharge port, between P-, add after load, the output current of battery can be at the electric discharge metal-oxide-semiconductor Q1 of conducting, the upper generation of charging metal-oxide-semiconductor Q2 pressure drop, voltage comparator U2 compares the sampled voltage of electric discharge port negative pole P-with the reference voltage V ref setting in advance, when battery output current is greater than limit value, the employing voltage of electric discharge port negative pole P-is higher than reference voltage V ref, voltage comparator U1 will change output state, discharging and recharging control logic device U1 controlled discharge metal-oxide-semiconductor Q1 disconnects, battery stops electric discharge.
This control mode does not first limit electric current, when electric current is greater than set point, then limits.But circuit is made comparisons sampled voltage and the reference voltage V ref of electric discharge port negative pole P-, and then output signal Dout goes controlled discharge metal-oxide-semiconductor Q1 disconnection, and this process has certain time of delay.Because exist this time of delay, if the circuital current fast rise of battery output, when electric discharge metal-oxide-semiconductor Q1 disconnects, the actual current value that will limit of current ratio of battery output will be much bigger.For example; the battery that has the above-mentioned current-limiting protection scheme of a use; 3A during electric discharge output-current limitation that circuit arranges; but; when this battery, giving hand-held electric power supply moment (maximum average current during this electrical equipment normal operation is 1.7A), the instantaneous peak current of testing can reach 15A (seeing Fig. 2).
Visible, the defect of existing cell discharge protective device is, because the external power switch of battery is at ordinary times normal open, just has electric current output, if output suddenly-applied short circuit is easy to occur the accident that sparking is hurted sb.'s feelings as long as the electric discharge output port of battery connects load.And sparking accident makes battery pole piece be prone to the phenomenon of carbonization loose contact, affects the useful life of battery pole piece, thereby affects the reliability of electronic product.
Summary of the invention
Object of the present invention provides a kind of battery protecting apparatus, and the Transient Currents that this battery protecting apparatus effectively suppresses prevents the accident that sparking is hurted sb.'s feelings, and strengthens the fail safe that battery is used.
A kind of battery protecting apparatus of the present invention, comprises and discharges and recharges control logic device, and an output connects the grid (Q1) of the first metal-oxide-semiconductor, and another output connects the grid of the second metal-oxide-semiconductor (Q2); The first metal-oxide-semiconductor (Q1) source electrode connects ground, and drain electrode connects the second metal-oxide-semiconductor (Q2) source electrode, and the drain electrode of the second metal-oxide-semiconductor (Q2) connects electric discharge port negative pole (P-); Also comprise: feedback end (S) and control of discharge unit: one end, control of discharge unit is connected feedback end (S), one end connects electric discharge port; Feedback end (S), while connecting load for battery, obtains feedback voltage; Control of discharge unit, for when feedback end (S) obtains feedback voltage, controlled discharge switching tube Delayed conducting, and make the descending variation of conducting resistance of discharge switch pipe.
Preferably, described control of discharge unit comprises the 3rd metal-oxide-semiconductor (Q3), the 4th metal-oxide-semiconductor (Q4) and the 5th metal-oxide-semiconductor (Q5), the 5th metal-oxide-semiconductor (Q5) source electrode connects the drain electrode of charging the second metal-oxide-semiconductor (Q2), the 5th metal-oxide-semiconductor (Q5) drain electrode connects electric discharge port negative pole (P-), the 5th metal-oxide-semiconductor (Q5) grid is by the first electric capacity (C1) ground connection in parallel, the drain electrode of also receiving the 3rd metal-oxide-semiconductor (Q3); The source electrode of the 3rd metal-oxide-semiconductor (Q3) connects electric discharge port anodal (P+), and grid is received electric discharge port anodal (P+), the drain electrode of also receiving the 4th metal-oxide-semiconductor (Q4); The 4th metal-oxide-semiconductor (Q4) source ground, grid is received feedback end (S).
Preferably, described control of discharge unit also comprises the second resistance (R2) being connected in parallel with the first electric capacity (C1).
Preferably, the 4th metal-oxide-semiconductor (Q4) grid is by the 6th resistance (R6) ground connection.
Preferably, control of discharge unit comprises the 3rd metal-oxide-semiconductor (Q3) and the 4th metal-oxide-semiconductor (Q4), the 3rd metal-oxide-semiconductor (Q3) drain electrode connects electric discharge port anodal (P+), grid connects electric discharge port anodal (P+) by the 3rd resistance (R3), also connects the drain electrode of the 4th metal-oxide-semiconductor (Q4); The 4th metal-oxide-semiconductor (Q4) source ground, grid meets feedback end S; The grid of the 3rd metal-oxide-semiconductor (Q3) connects the first metal-oxide-semiconductor (Q1) grid, the first electric capacity in parallel (C1) between the first metal-oxide-semiconductor (Q1) grid and battery core negative pole.
Preferably, control of discharge unit comprises and also comprises the first diode (D1), the anodic bonding of the first diode (D1) the first metal-oxide-semiconductor (Q1) grid that discharges, and negative electrode connects the electric discharge output of electric control logic device.
Preferably, the grid of the 4th metal-oxide-semiconductor (Q4) is by the 6th resistance (R6) ground connection.
Preferably, control of discharge unit comprises the 5th metal-oxide-semiconductor (Q5), and the 5th metal-oxide-semiconductor (Q5) source electrode connects the charging port (C+) of battery, and grid meets feedback end S, between source electrode and grid, connect the first electric capacity (C1), drain electrode connects electric discharge port anodal (P+).
Preferably, control of discharge unit also comprises second resistance (R2) in parallel with the first electric capacity (C1).
The present invention also provides a kind of battery protecting method, and the Transient Currents that the method can effectively suppress prevents the accident that sparking is hurted sb.'s feelings, and strengthens the fail safe that battery is used.
A kind of battery protecting method of the present invention, the method also comprises: when battery is connected load, obtain the feedback voltage of electric discharge port; Control the discharge switch pipe Delayed conducting being connected with electric discharge port in battery protecting circuit, make the descending variation of conducting resistance of discharge switch pipe.Compared with prior art, the present invention has the following advantages:
When the present invention connects load at battery, Time Delay Opening discharge switch pipe, the moment of avoiding the electric discharge output port of battery to connect load has compared with High-current output, prevents the accident that sparking is hurted sb.'s feelings.Because protecting exposed electric discharge pole piece to be discharged switching tube, cut off, without the sorrow of electric leakage, extended the memory time of battery.And the present invention makes the descending variation of the conducting resistance of discharge switch pipe, the Transient Currents effectively suppressing.
Accompanying drawing explanation
Fig. 1 is existing battery protecting apparatus structure chart;
Fig. 2 is existing battery protecting apparatus test design sketch;
Fig. 3 is battery protecting apparatus structure chart of the present invention;
Fig. 4 is battery protecting apparatus the first example structure figure of the present invention;
Fig. 5 is battery protecting apparatus the second example structure figure of the present invention;
Fig. 6 is battery protecting apparatus of the present invention the 3rd example structure figure;
Fig. 7 is battery output current wave figure of the present invention;
Fig. 8 is battery protecting method flow chart of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
The present invention increases at battery discharge output the judgement that a feedback end S connects as load, when the load of battery and appointment is connected, feedback end S obtains a feedback voltage, when feedback voltage meets the requirements, instruction discharge switch pipe starts conducting, the conducting of discharge switch pipe have one by large resistance the variable resistance process to small resistor, to suppress the Transient Currents of battery discharge.
Referring to Fig. 3, battery protecting apparatus of the present invention is shown, comprise and discharge and recharge control logic device U1, discharge and recharge control logic device U1 one end and connect battery discharge port negative pole P-by resistance R S, discharge and recharge the grid that control logic device U1 mono-output connects electric discharge metal-oxide-semiconductor Q1, another output connects the grid of charging metal-oxide-semiconductor Q2; The electric discharge metal-oxide-semiconductor Q1 source electrode utmost point connects the negative pole of battery core, and drain electrode connects the source electrode of charging metal-oxide-semiconductor Q2, and the drain electrode of charging metal-oxide-semiconductor Q2 connects electric discharge port negative pole P-;
One feedback end S is set, and feedback end S is connected with the anodal P+ of electric discharge port or electric discharge port negative pole P-, and feedback end S connects a control of discharge unit 11.When battery is connected after load, control of discharge unit 11 obtains feedback voltage at feedback end S, when feedback voltage reaches set point, control of discharge unit 11 controlled discharge switching tube Delayed conductings, and the descending variation of the conducting resistance that makes discharge switch pipe, effectively suppresses the Transient Currents of battery discharge.
The first embodiment.
Referring to Fig. 4, battery protecting apparatus the first embodiment of the present invention is shown, comprise and discharge and recharge control logic device U1, discharge and recharge control logic device U1 one end and connect battery recharger port negative pole C-by resistance R S, discharge and recharge the grid that control logic device U1 mono-output connects electric discharge metal-oxide-semiconductor Q1, another output connects the grid of charging metal-oxide-semiconductor Q2; Electric discharge metal-oxide-semiconductor Q1 source electrode connects the negative pole of battery core, and drain electrode connects the source electrode of charging metal-oxide-semiconductor Q2, and the anodal P+ of electric discharge port, the anodal C+ of charging port are connected with the positive pole of battery core;
Also comprise the feedback end S being connected with the anodal P+ of electric discharge port, control of discharge unit 11 comprises metal-oxide-semiconductor Q 3, metal-oxide-semiconductor Q4 and metal-oxide-semiconductor Q5, metal-oxide-semiconductor Q5 source electrode connects the drain electrode of charging metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q5 drain electrode meets electric discharge port negative pole P-, metal-oxide-semiconductor Q5 grid is by capacitor C in parallel 1 and resistance R 2 ground connection, the drain electrode of also receiving metal-oxide-semiconductor Q3 by resistance R 1; The source electrode of metal-oxide-semiconductor Q3 meets the anodal P+ of electric discharge port, and grid is received the anodal P+ of electric discharge port, the drain electrode of also receiving metal-oxide-semiconductor Q4 by resistance R 4 by resistance R 3; Metal-oxide-semiconductor Q4 source ground, grid is received feedback end S by resistance R 5, also by resistance R 6 ground connection.
When battery adds load, feedback end S obtains a positive feedback voltage input from the anodal P+ of electric discharge port, makes metal-oxide-semiconductor Q4 conducting, after metal-oxide-semiconductor Q4 conducting, metal-oxide-semiconductor Q3 obtains bias voltage conducting, and after metal-oxide-semiconductor Q3 conducting, anode voltage is by metal-oxide-semiconductor Q3,1 charging of 1 pair of capacitor C of resistance R.Along with the charging voltage in capacitor C 1 raises, when charging voltage is greater than the conducting voltage of metal-oxide-semiconductor Q5, metal-oxide-semiconductor Q5 proceeds to conducting by disconnection, and electric discharge port anodal P+, P-have electric current output.
Between capacitor C 1 charge period, the conducting resistance of metal-oxide-semiconductor Q5 has a descending change procedure, has limited the Transient Currents of battery output.The present invention also can pass through the resistance of adjusting resistance R1 and the capacitance of capacitor C 1, changes the pace of change of metal-oxide-semiconductor Q5 conducting resistance, to adapt to the requirement of different load circuits.
In this embodiment, metal-oxide-semiconductor Q4 and metal-oxide-semiconductor Q5 are N-type field effect transistor switch pipe, and metal-oxide-semiconductor Q3 is P type field effect transistor switch pipe.Metal-oxide-semiconductor Q5 is discharge switch pipe.
The second embodiment.
Referring to Fig. 5, battery protecting apparatus the second embodiment of the present invention is shown, comprise and discharge and recharge control logic device U1, discharge and recharge control logic device U1 one end and connect battery discharge port negative pole P-by resistance R S, discharge and recharge the grid that control logic device U1 mono-output connects electric discharge metal-oxide-semiconductor Q1, another output connects the grid of charging metal-oxide-semiconductor Q2; The electric discharge metal-oxide-semiconductor Q1 source electrode utmost point connects the negative pole of battery core, and drain electrode connects the source electrode of charging metal-oxide-semiconductor Q2, and the anodal P+ of electric discharge port connects the positive pole of battery core;
Also comprise the feedback end S being connected with the anodal P+ of electric discharge port, control of discharge unit 11 comprises metal-oxide-semiconductor Q3 and metal-oxide-semiconductor Q4, and metal-oxide-semiconductor Q3 drain electrode meets the anodal P+ of electric discharge port, and grid meets the anodal P+ of electric discharge port by resistance R 3, also by resistance R 4, connects the drain electrode of metal-oxide-semiconductor Q4; Metal-oxide-semiconductor Q4 source ground, grid meets feedback end S by resistance R 5, and arrives ground by resistance R 6; The drain electrode of metal-oxide-semiconductor Q3 connects electric discharge metal-oxide-semiconductor Q1 grid, shunt capacitance C1 and resistance R 2 between metal-oxide-semiconductor Q1 grid and battery core negative pole by resistance R 1; The anodic bonding electric discharge metal-oxide-semiconductor Q1 grid of diode D1, negative electrode connects the electric discharge output Dout of electric control logic device U1.
When battery adds load, feedback end S has a positive feedback voltage input, and this positive feedback voltage will make metal-oxide-semiconductor Q4 conducting, after metal-oxide-semiconductor Q4 conducting, metal-oxide-semiconductor Q3 obtains bias voltage conducting, and after metal-oxide-semiconductor Q3 conducting, anode voltage is by metal-oxide-semiconductor Q3,1 charging of 1 pair of capacitor C of resistance R.Along with charging voltage in capacitor C 1 raises, metal-oxide-semiconductor Q1 proceeds to conducting by disconnection.Between capacitor C 1 charge period, the conducting resistance of metal-oxide-semiconductor Q1 has a descending change procedure, has limited the Transient Currents of battery output.By the resistance of adjusting resistance R1 and the capacitance of C1, can regulate the pace of change of metal-oxide-semiconductor Q1 conducting resistance, to adapt to the requirement of different load circuits.
In this embodiment, metal-oxide-semiconductor Q4 is N-type field effect transistor switch pipe, and metal-oxide-semiconductor Q3 is P type field effect transistor switch pipe.Metal-oxide-semiconductor Q1 is discharge switch pipe.
The 3rd embodiment.
Referring to Fig. 6, battery protecting apparatus of the present invention the 3rd embodiment is shown, comprise and discharge and recharge control logic device U1, discharge and recharge control logic device U1 one end and connect battery discharge port negative pole P-by resistance R S, discharge and recharge the grid that control logic device U1 mono-output connects electric discharge metal-oxide-semiconductor Q1, another output connects the grid of charging metal-oxide-semiconductor Q2; The electric discharge metal-oxide-semiconductor Q1 source electrode utmost point connects the negative pole of battery core, and drain electrode connects the source electrode of charging metal-oxide-semiconductor Q2, and the anodal P+ of electric discharge port connects the positive pole of battery core;
Also comprise the feedback end S being connected with the anodal P+ of electric discharge port, control of discharge unit 11 comprises metal-oxide-semiconductor Q5, and metal-oxide-semiconductor Q5 source electrode meets the anodal C+ of charging port, and grid meets feedback end S by resistance R 1, between source electrode and control grid, connect capacitor C in parallel 1 and resistance R 2, drain electrode meets the anodal P+ of electric discharge port.
When battery is connected load, feedback end S is connected with battery discharge port negative pole P-by load circuit, and battery core cathode voltage is by 1 charging of 1 pair of capacitor C of resistance R, and along with charging voltage in capacitor C 1 raises, metal-oxide-semiconductor Q5 proceeds to conducting by disconnection.Between capacitor C 1 charge period, the conducting resistance of metal-oxide-semiconductor Q5 has one to have the large little change procedure that arrives, and has limited the Transient Currents of battery output.The capacitance of resistance and capacitor C 1 by adjusting resistance R1, can regulate the pace of change of metal-oxide-semiconductor Q5 conducting resistance, to adapt to different load circuit requirements.
In this embodiment, metal-oxide-semiconductor Q5 is P type field effect transistor switch pipe.Metal-oxide-semiconductor Q5 is discharge switch pipe.
Referring to Fig. 7, battery output current wave of the present invention is shown.This current waveform transient current value only has 2.5A.Visible, the present invention connects the large current limit successful of load transient to battery.
When the present invention connects load at battery, Time Delay Opening discharge switch pipe, the moment of avoiding the electric discharge output port of battery to connect load has compared with High-current output, prevents the accident that sparking is hurted sb.'s feelings.Because protecting exposed electric discharge pole piece to be discharged switching tube, cut off, without the sorrow of electric leakage, extended the memory time of battery.And the present invention makes the descending variation of the conducting resistance of discharge switch pipe, the Transient Currents effectively having suppressed.
Based on above-mentioned battery protecting apparatus, the present invention also provides a kind of battery discharge protection method.Referring to Fig. 8, concrete steps are as follows.
Step S801, when battery is connected load, obtain the feedback voltage of electric discharge port;
Step S802, control the discharge switch pipe Delayed conducting being connected with electric discharge port in battery protecting circuit, and make the descending variation of conducting resistance of discharge switch pipe, reduce gathering way of battery discharge current, effectively suppress the Transient Currents of battery discharge.
The foregoing is only the preferred embodiment of the present invention, do not form limiting the scope of the present invention.Any any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection range of the present invention.
Claims (9)
1. a battery protecting apparatus, comprises and discharges and recharges control logic device, and an output connects the grid (Q1) of the first metal-oxide-semiconductor, and another output connects the grid of charging the second metal-oxide-semiconductor (Q2); The first metal-oxide-semiconductor (Q1) source electrode connects ground, and drain electrode connects charging the second metal-oxide-semiconductor (Q2) drain electrode, and the source electrode of the second metal-oxide-semiconductor (Q2) that charges connects electric discharge port negative pole (P-); It is characterized in that, also comprise: feedback end (S) and control of discharge unit: one end, control of discharge unit is connected feedback end (S), one end connects electric discharge port anodal (P+);
Feedback end (S), while connecting load for battery, obtains feedback voltage;
Control of discharge unit, for when feedback end (S) obtains feedback voltage, controlled discharge switching tube Delayed conducting, and make the descending variation of conducting resistance of discharge switch pipe.
2. device as claimed in claim 1, it is characterized in that, described control of discharge unit comprises the 3rd metal-oxide-semiconductor (Q3), the 4th metal-oxide-semiconductor (Q4) and the 5th metal-oxide-semiconductor (Q5), the 5th metal-oxide-semiconductor (Q5) source electrode connects the source electrode of charging the second metal-oxide-semiconductor (Q2), the 5th metal-oxide-semiconductor (Q5) drain electrode connects electric discharge port negative pole (P-), the 5th metal-oxide-semiconductor (Q5) grid is by the first electric capacity (C1) ground connection in parallel, the drain electrode of also receiving the 3rd metal-oxide-semiconductor (Q3); The source electrode of the 3rd metal-oxide-semiconductor (Q3) connects electric discharge port anodal (P+), and grid is received electric discharge port anodal (P+), the drain electrode of also receiving the 4th metal-oxide-semiconductor (Q4); The 4th metal-oxide-semiconductor (Q4) source ground, grid is received feedback end (S), and the 5th metal-oxide-semiconductor (Q5) is discharge switch pipe.
3. device as claimed in claim 2, is characterized in that, described control of discharge unit also comprises the second resistance (R2) being connected in parallel with the first electric capacity (C1).
4. device as claimed in claim 2, is characterized in that, the 4th metal-oxide-semiconductor (Q4) grid is by the 6th resistance (R6) ground connection.
5. device as claimed in claim 1, it is characterized in that, control of discharge unit comprises the 3rd metal-oxide-semiconductor (Q3) and the 4th metal-oxide-semiconductor (Q4), the 3rd metal-oxide-semiconductor (Q3) source electrode connects electric discharge port anodal (P+), grid connects electric discharge port anodal (P+) by the 3rd resistance (R3), also connects the drain electrode of the 4th metal-oxide-semiconductor (Q4); The 4th metal-oxide-semiconductor (Q4) source ground, grid connects feedback end (S); The drain electrode of the 3rd metal-oxide-semiconductor (Q3) connects the first metal-oxide-semiconductor (Q1) grid, the first electric capacity in parallel (C1) between the first metal-oxide-semiconductor (Q1) grid and battery core negative pole, and the first metal-oxide-semiconductor (Q1) is discharge switch pipe.
6. device as claimed in claim 5, it is characterized in that, control of discharge unit also comprises the first diode (D1), the anodic bonding of the first diode (D1) the first metal-oxide-semiconductor (Q1) grid that discharges, and negative electrode connects the electric discharge output that discharges and recharges control logic device.
7. device as claimed in claim 5, is characterized in that, the grid of the 4th metal-oxide-semiconductor (Q4) is by the 6th resistance (R6) ground connection.
8. device as claimed in claim 1, it is characterized in that, control of discharge unit comprises the 5th metal-oxide-semiconductor (Q5), the 5th metal-oxide-semiconductor (Q5) source electrode connects the charging port (C+) of battery, grid connects feedback end (S), between source electrode and grid, connect the first electric capacity (C1), drain electrode connects electric discharge port anodal (P+), and the 5th metal-oxide-semiconductor (Q5) is discharge switch pipe.
9. device as claimed in claim 8, is characterized in that, control of discharge unit also comprises second resistance (R2) in parallel with the first electric capacity (C1).
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| CN106026277A (en) * | 2016-07-01 | 2016-10-12 | 北京云迹科技有限公司 | Controllable battery charging circuit and charger |
| CN106130100A (en) * | 2016-07-01 | 2016-11-16 | 北京云迹科技有限公司 | Controlled battery charger and charger |
| CN108767837B (en) * | 2018-08-20 | 2023-10-13 | 深圳市格瑞普智能电子有限公司 | Power connection method, power connector anti-sparking circuit and power with circuit |
| DE102018220212A1 (en) * | 2018-11-26 | 2020-05-28 | Robert Bosch Gmbh | Method for operating an electrical energy store |
| CN111835048B (en) * | 2019-04-22 | 2022-07-15 | 添可智能科技有限公司 | Charging and discharging switching circuit and electronic equipment |
| CN110266085A (en) * | 2019-07-17 | 2019-09-20 | 深圳市超力源科技有限公司 | A kind of unmanned plane battery management discharge-preventing sparking method |
| CN111342526A (en) * | 2020-04-11 | 2020-06-26 | 东莞市福洋电子有限公司 | Output protection device of charger |
| WO2022061516A1 (en) * | 2020-09-22 | 2022-03-31 | 海能达通信股份有限公司 | Control circuit and battery |
| CN112583078B (en) * | 2020-12-17 | 2022-06-21 | 西安稳先半导体科技有限责任公司 | Battery pack, battery protection chip and electronic product |
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| CN102170117A (en) | 2011-08-31 |
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