CN202906496U - Mobile power supply - Google Patents
Mobile power supply Download PDFInfo
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- CN202906496U CN202906496U CN 201220346890 CN201220346890U CN202906496U CN 202906496 U CN202906496 U CN 202906496U CN 201220346890 CN201220346890 CN 201220346890 CN 201220346890 U CN201220346890 U CN 201220346890U CN 202906496 U CN202906496 U CN 202906496U
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Abstract
The utility model provides a mobile power supply. The mobile power supply comprises a battery protection circuit, a battery, a switch combination circuit and an internal load circuit, wherein the battery supplies the power outside via the internal load circuit. The battery protection circuit detects whether the discharge of the battery is abnormal or not; if yes, a control signal for forbidding the discharge is output, if no, a control signal for allowing the discharge is output. The switch combination circuit cuts off the discharge circuit of the battery based on the control signal for forbidding the discharge, and connects the discharge circuit of the battery based on the control signal for allowing the discharge. The internal load circuit is made to stop working based on the control signal for forbidding the discharge, and start to work based on the control signal for allowing the discharge. Thus the exiting of the discharge over-current protection state is facilitated without an external power supply.
Description
[technical field]
The utility model relates to field of power supplies, particularly a kind of portable power source.
[background technology]
Portable power source is a kind of portable charger that integrates power supply and charge function, and it can charge or the standby power supply whenever and wherever possible to digital equipments such as mobile phones.Generally by lithium cell or dry cell as charge storage unit.Be different from the battery of interiors of products configuration, also be externally hanging battery.The general multiple power sources adapter that is equipped with, usually have large capacity, multipurpose, volume is little, the life-span is long and the characteristics such as safe and reliable, be can be whenever and wherever possible to be the functional product of the multiple digital product power supply such as mobile phone, MP3, MP4, mobile phone, PDA, palmtop PC, handheld device or standby charging.
Common described portable power source inside has battery protecting circuit and comes discharging and recharging of the battery in it protected.When portable power source owing to output port short circuit or load be heavier etc. when reason causes output current excessive, described battery protecting circuit can cause described portable power source to enter the discharge over-current guard mode.When the positive pole of the described battery pressure reduction to the negative pole of the enough height of pressure reduction on ground or described battery to ground was enough low, described battery protecting circuit just can allow the battery recovery normal power supply.Yet, generally, eliminate even cause the reason of discharge overcurrent, such as having recovered again not short circuit after the short circuit, again load have been got rid of after the heavy duty, described portable power source can't reach the condition that withdraws from the discharge overcurrent protection usually.Therefore, described portable power source system is eliminated even cause the reason of discharge overcurrent after entering the discharge overcurrent protection, and system still can enter the state of self-locking.Only have external power source is connected to described portable power source, the described portable power source externally driving of power supply is issued to the condition that withdraws from the discharge overcurrent protection, and then recovers the normal power supply of described battery.In other words, described mobile battery must could activate again by connecting external power source after entering the discharge overcurrent protection, and this has hindered the application of portable power source greatly, has brought inconvenience also for the use of portable power source.
Therefore, be necessary to provide a kind of improved portable power source to overcome the problems referred to above.
[utility model content]
The purpose of this utility model is to provide a kind of portable power source, and it can withdraw from discharge overcurrent protection state in not by the situation of external power supply automatically, so that the normal supplying power for outside of battery.
In order to address the above problem, the utility model provides a kind of portable power source, and it comprises battery protecting circuit, battery, switch combination circuit and internal load circuit, and described battery is externally powered via described internal load circuit.Whether described battery protecting circuit detects the discharge of described battery unusual, and if so, then discharge control signal is forbidden in output, and if not, then output allows discharge control signal; Described switch combination circuit cuts off the discharge loop of described battery based on the described discharge control signal of forbidding, based on allowing discharge control signal to be communicated with the discharge loop of described battery; According to the described discharge control signal of forbidding described internal load circuit is quit work, according to described permission discharge control signal described internal load circuit is started working.
Further, described internal load circuit comprises booster circuit, this booster circuit comprises boost control circuit, according to the described discharge control signal of forbidding described boost control circuit is quit work, and according to described permission discharge control signal described boost control circuit is started working.
Further; described battery protecting circuit is exported described permission discharge control signal and the described discharge control signal of forbidding by the control of discharge output; described control of discharge output directly links to each other with the Enable Pin of described boost control circuit or links to each other with the Enable Pin of described boost control circuit by a resistance; when the described permission discharge control signal of described control of discharge output output; Enable Pin by described boost control circuit enables described boost control circuit; in that the output of described control of discharge output is described when forbidding discharge control signal, by the described boost control circuit of described Enable Pin disable.
Further, this booster circuit also comprises the bleeder circuit that boosts, and according to the described discharge control signal of forbidding the described bleeder circuit that boosts is quit work, and according to described permission discharge control signal the described bleeder circuit that boosts is started working.
Further; described battery protecting circuit is exported described permission discharge control signal and the described discharge control signal of forbidding by the control of discharge output; the described bleeder circuit that boosts comprises series connection enable circuits in the inner; described control of discharge output directly links to each other with the Enable Pin of described boost control circuit or links to each other with the Enable Pin of described boost control circuit through a resistance; described control of discharge output also directly links to each other with the control end of the enable circuits of the described bleeder circuit that boosts or links to each other with the control end of enable circuits in being series at the described bleeder circuit that boosts through a resistance; when the described permission discharge control signal of described control of discharge output output; Enable Pin by described boost control circuit enables described boost control circuit; control end by the enable circuits in the described bleeder circuit that boosts enables the described bleeder circuit that boosts; in that the output of described control of discharge output is described when forbidding discharge control signal; by the described boost control circuit of Enable Pin disable of described boost control circuit, by the described bleeder circuit that boosts of the control end disable of the enable circuits in the described bleeder circuit that boosts.
Further, the described bleeder circuit that boosts comprises the output voltage that is connected on described portable power source and two divider resistances between the ground, the switch of the enable circuits of the described bleeder circuit that boosts for connecting with described divider resistance, the control end of described switch is the control end of the enable circuits of the described bleeder circuit that boosts.
Further, the described bleeder circuit that boosts comprises the output voltage that is connected on described portable power source and two divider resistances between its enable circuits, the enable circuits of the described bleeder circuit that boosts is inverter, the input of described inverter is the control end of the enable circuits of the described bleeder circuit that boosts, and the low level of described inverter output is ground.
Further, described booster circuit comprises the output circuit that boosts, this output circuit that boosts include power tube and be connected on power tube and ground between so that enable circuits that can described power tube, the described bleeder circuit that boosts comprises enable circuits and is connected on the output voltage of described portable power source and two divider resistances between its enable circuits, described control of discharge output directly links to each other with the control end of the enable circuits of the bleeder circuit that boosts or the control end by a resistance and described enable circuits, described control of discharge output also links to each other with the control end of enable circuits of power tube in the output circuit that boosts, the enable circuits of bleeder circuit of boosting links to each other with the earth terminal of described boost control circuit with node between one of them divider resistance, when the described permission discharge control signal of described control of discharge output output, the control end of the enable circuits by the described bleeder circuit that boosts is so that the direct ground connection of that node between the enable circuits of the described bleeder circuit that boosts and one of them divider resistance, the bleeder circuit and enable described boost control circuit so that can be described boost, the control end of the enable circuits by the power tube in the described output circuit that boosts is so that can described power tube, in that the output of described control of discharge output is described when forbidding discharge control signal, the control end of the enable circuits by the described bleeder circuit that boosts so that node between the enable circuits of the described bleeder circuit that boosts and one of them divider resistance disconnect with ground, with described bleeder circuit and the described boost control circuit of disable of boosting of disable, the control end of the enable circuits by the power tube in the described output circuit that boosts is with the described power tube of disable.
Further, the enable circuits of described boost bleeder circuit or described power tube is switch, a link of described switch connects ground, and another link connects a link of one of them divider resistance or power tube, and the control end of described switch is the control end of described enable circuits; Perhaps the enable circuits of described boost bleeder circuit or described power tube is inverter, the output of described inverter connect one of them divider resistance or or a link of power tube, the input of described inverter is the control end of described enable circuits, and the low level of described inverter output is ground.
Further, described booster circuit also includes the output circuit that boosts, the output of this output circuit that boosts is as the output of portable power source, described boost control circuit has the test side, feedback end, Enable Pin, the control output end, power end and earth terminal, described feedback end receives the described bleeder circuit that boosts and obtains feedback voltage, it obtains exporting control signal according to described feedback voltage, and export described output control signal by described control output end and give the described output circuit that boosts, the described output circuit that boosts obtains suitable output voltage under the control of described boost control circuit.
Further; described discharge comprises that unusually the discharge overcurrent is unusual and the discharge overvoltage is unusual; both any one think that unusually discharge is unusual; when unusual and discharge overvoltage is unusual at the discharge overcurrent; described switch combination circuit based on described forbid that discharge control signal cuts off the discharge loop of described battery after; enter discharge overcurrent protection state this moment; whether whether the absolute value that described battery protecting circuit detects the positive pole voltage difference over the ground of described battery under this state is higher than the predetermined absolute value that withdraws from the negative pole voltage difference over the ground of voltage threshold or described battery is lower than another predetermined voltage threshold that withdraws from; if; then output allows discharge control signal; so that the described switch combination circuit discharge loop of the described battery of conducting again; otherwise continue output and forbid discharge control signal; under discharge overcurrent protection state; described battery still can be exported a weak current, the voltage that this weak current can charge to draw high gradually described anode to the positive pole that is connected to battery and the electric capacity between the ground.
Further, under discharge overcurrent protection state, between the negative pole of battery and ground, keep a very weak discharge path so that described battery still can be exported described weak current, this weak current be milliampere and following grade other.
Compared with prior art; portable power source in the utility model is after entering discharge overcurrent protection state; internal load circuit behind the shutoff battery; described battery still can be exported faint output current (or being called weak current or weak output current) under discharge overcurrent protection state; the cathode voltage that this faint output current charges to improve constantly described battery to the positive pole that is connected to battery and the electric capacity between the ground; thereby finally can reach the condition that withdraws from the discharge overcurrent protection; realize automatically withdrawing from discharge overcurrent protection state; so that the normal supplying power for outside of battery, thereby user-friendly.
[description of drawings]
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.Wherein:
Fig. 1 is the portable power source structured flowchart in one embodiment in the utility model;
Fig. 2 is the internal load circuit among Fig. 1 and cooperates the circuit block diagram of circuit in the first embodiment;
Fig. 3 is the internal load circuit among Fig. 1 and cooperates circuit circuit block diagram in a second embodiment;
Fig. 4 is the internal load circuit among Fig. 1 and cooperates the circuit block diagram of circuit in the 3rd embodiment;
Fig. 5 is the internal load circuit among Fig. 1 and cooperates the circuit block diagram of circuit in the 4th embodiment; With
Fig. 6 is the internal load circuit among Fig. 1 and cooperates the circuit block diagram of circuit in the 5th embodiment.
[embodiment]
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Alleged " embodiment " or " embodiment " refer to be contained in special characteristic, structure or the characteristic at least one implementation of the utility model herein.Different local in this manual " in one embodiment " that occur not are all to refer to same embodiment, neither be independent or the embodiment mutually exclusive with other embodiment optionally.Unless stated otherwise, herein connection, the word that the expression that links to each other, join is electrically connected all represents directly or indirectly to be electrical connected.
In the utility model; (it comprises two states to the discharge control signal of exporting according to the battery protecting circuit in the portable power source; a kind of is to forbid discharge control signal; another kind is to allow discharge control signal) control the internal load circuit behind the battery; so that when battery is in discharge overcurrent protection state; the corresponding state of forbidding work that is in of described internal load circuit prevents from making portable power source can't withdraw from the discharge over-current state owing to the internal load circuit starts too early.
Fig. 1 is portable power source 100 structured flowchart in one embodiment in the utility model.As shown in Figure 1, described portable power source 100 comprises charging control circuit 110, battery protecting circuit 120, switch combination circuit 130, battery 140 and internal load circuit 150, and described battery 140 is externally powered via described internal load circuit 150.
The input of described charging control circuit 110 can connect external power supply, and output connects the anodal BATP of described battery 140, and it can be controlled the charging of described battery 140 described external power supply.Such as, the control charging current, when control stops described battery 140 is charged.Do not affect the realization of the technical solution of the utility model about the detailed charging control process of described charging control circuit 110, and the charging control process of described battery can adopt any one battery charging control technology of the prior art, so locate to repeat no more.
Described battery protecting circuit 120 is used for described battery is carried out charge protection and discharge prevention.
Whether the charging that described battery protecting circuit 120 detects described battery is unusual; if unusual; then forbid charging control signal by its charging control output end C_OUT output, if not unusual, then allow charging control signal by its charging control output end C_OUT output.This is forbidden charging control signal and allows charging control signal can be two kinds of logic states of a signal, and such as forbidding that charging control signal is low level, described permission charging control signal is high level.Described charging generally includes two kinds unusually, and a kind of is that the charging overcurrent is unusual, and a kind of is that the charging overvoltage is unusual, and both any one occur unusually then thinking that charging is unusual.Described charging overcurrent refers to the charging current of battery unusually more than or equal to predetermined charging overcurrent threshold value, otherwise it is not unusual to be considered as charging current.Described charging overvoltage refers to the charging voltage of battery unusually more than or equal to predetermined charging overvoltage threshold, otherwise it is not unusual to be considered as charging voltage.
Whether the discharge that described battery protecting circuit 120 detects described battery is unusual; if unusual; then forbid discharge control signal by its control of discharge output D_OUT output, if not unusual, then allow discharge control signal by its control of discharge output D_OUT output.This is forbidden discharge control signal and allows discharge control signal can be two kinds of logic states of a signal, and such as forbidding that discharge control signal is low level, described permission discharge control signal is high level.Described discharge generally includes two kinds unusually, and a kind of is that the discharge overcurrent is unusual, and a kind of is that the discharge overvoltage is unusual, and both any one occur unusually then thinking that discharge is unusual.Described discharge overcurrent refers to the discharging current of battery unusually more than or equal to predetermined discharge overcurrent threshold value, otherwise it is not unusual to be considered as discharging current.Described discharge overvoltage refers to that unusually the discharge voltage of battery is less than or equal to the predetermined discharge overvoltage threshold, otherwise it is not unusual to be considered as discharge voltage.
In one embodiment; described battery protecting circuit 120 is determined described discharging current or charging current based on the voltage of the voltage of the link VSS that links to each other with the negative pole BATN of battery 140 and the link VM that is connected to the ground, and described battery protecting circuit 120 is determined described discharge voltage and charging voltage based on the voltage of the link VDD that links to each other with the anodal BATP of battery 140 with the voltage of the link VSS that links to each other with the negative pole BATN of battery 140.
Described switch combination circuit 130 cuts off the charge circuit of described battery 140 according to the described charging control signal of forbidding, according to the charge circuit of the described battery 140 of described permission charging control signal conducting, so that described battery 140 is carried out charge protection.Described switch combination circuit 130 cuts off the discharge loop of described battery 140 based on the described discharge control signal of forbidding, is communicated with the discharge loop of described battery 140 based on described permission discharge control signal, so that described battery is carried out discharge prevention.
Described switch combination resistance 130 can adopt general switch combination in the relevant battery charging and discharging path of the prior art, be associated between the negative pole and ground of battery 140 such as two NMOS (N-type Metal Oxide Semiconductor) strings of transistors, at diode of the drain-source two ends of each nmos pass transistor series connection, the grid of one of them nmos pass transistor receives the discharge control signal (comprise and forbid discharge control signal and allow discharge control signal) from described discharge output control terminal, the grid of another nmos pass transistor receives the charging control signal (comprise and forbid charging control signal and allow charging control signal) from described charging output control terminal, a variety of implementation methods in the prior art, can choose at random, in the utility model, not do particular determination.
In the utility model, the anodal BATP of battery 140 is referred to as internal load circuit 150 to the circuit between the output VOUT of described portable power source, it may consume the output current on the described battery 140.Corresponding with the internal load circuit, the load circuit of outside that is connected in the output VOUT of described portable power source 100 can be referred to as external load circuit.
When unusual and discharge overvoltage is unusual at the discharge overcurrent, described switch combination circuit 130 based on battery protecting circuit 120 outputs forbid that discharge control signal cuts off the discharge loop of described battery after, described portable power source enters discharge overcurrent protection state.At this moment; whether whether the absolute value that described battery protecting circuit 120 detects the anodal BATP voltage difference over the ground of described battery is higher than a predetermined absolute value that withdraws from the negative pole BATN voltage difference over the ground of voltage threshold or described battery is lower than another and withdraws from predetermined voltage threshold (namely withdrawing from the condition of discharge overcurrent protection); if; then output allows discharge control signal; so that described switch combination circuit 130 discharge loop of the described battery 140 of conducting again; thereby withdraw from described discharge prevention state; recover the normal supplying power for outside of battery, otherwise continue the described discharge control signal of forbidding of output.
Yet, described in background, generally, to eliminate even cause the reason of discharge overcurrent, described portable power source 100 can't reach the condition that withdraws from the discharge overcurrent protection usually, therefore must the external power supply insertion could again activate described portable power source.
For this reason in the utility model; after portable power source 100 enters discharge overcurrent protection state; described battery 140 still can be exported a weak current; such as milliampere and following other electric current of level; if discharge overcurrent reason is eliminated; this weak current can be charged to the anodal BATP that is connected to battery 140 and the capacitor C 1 between the ground; along with the charging of described weak current to described capacitor C 1; the cathode voltage of described battery raises gradually; also gradually rising of the cathode voltage of described battery (this moment, cathode voltage was negative value); be higher than the predetermined absolute value that withdraws from the negative pole BATN voltage difference over the ground of voltage threshold or described battery at the absolute value of the anodal BATP of described battery voltage difference over the ground and be lower than another predetermined voltage threshold that withdraws from; described battery protecting circuit 120 outputs allow discharge control signal, so that the external normal power supply of described battery recovery.For example; suppose that described cell voltage be BATP to the pressure reduction of BATN is 3.7V; and for battery protecting circuit 120; (voltage such as negative pole BATN is negative 0.14V when the absolute value of the negative pole BATN voltage difference over the ground that detects battery is lower than 0.15V; ground level is 0V) or the positive pole voltage difference over the ground of battery when being higher than 3.55V, battery protecting circuit 120 just can be exported and allow discharge control signal again to make the discharge path conducting of described battery.
In one embodiment, under discharge overcurrent protection state, can be at the negative pole BATN of described battery to a weak discharge path be set between the ground, thus can produce weak current, this weak discharge by on have kilohm and other resistance of higher level.For instance, under discharge overcurrent protection state, the negative pole BATN of described battery by link VSS and VM with conducting, be provided with on the conduction path kilohm and other resistance of higher level.
Yet; in order to reduce the power consumption under the discharge prevention state; also avoid under the state of discharge overcurrent protection, destroying the internal circuit of external loading and portable power source; common described weak current all be milliampere and following level other; in practice; described weak current is when charging to draw high the cathode voltage of described battery to described capacitor C 1; when not arriving the condition that withdraws from the discharge overcurrent protection; will produce some load currents on the follow-up internal load circuit; when these internal load electric currents during greater than described weak current; described weak current is charged to described capacitor C 1 with regard to illegal again; thereby can't continue to rise to the voltage between the ground with the anodal BATP that causes battery, can not withdraw from the discharge prevention state.
In one embodiment, as shown in Figure 1, described discharge control signal can be connected to the Enable Pin of described internal load circuit, can described internal load circuit 150 be quit work according to the described discharge control signal of forbidding like this, according to described permission discharge control signal described internal load circuit 150 be started working.Like this; when entering discharge overcurrent protection state; the described discharge control signal of forbidding of control of discharge output output of battery protecting circuit 120; described internal load circuit 150 no longer produces the internal load electric current; the cathode voltage of described like this battery will constantly be drawn high; until that the absolute value of its voltage over the ground is lower than is predetermined when withdrawing from voltage threshold, thereby withdraw from discharge overcurrent protection state, so that the normal supplying power for outside of described battery.After withdrawing from discharge overcurrent protection state, described internal load circuit 150 can work, and does not therefore affect the normal use of described portable power source.
Described internal load circuit and arranged with the control of discharge output of described battery protecting circuit 120 various the connection and implementation, below selectivity describe.
Fig. 2 is the internal load circuit 150 among Fig. 1 and is mated the circuit block diagram of circuit in the first embodiment.As shown in Figure 2, described internal load circuit 150 comprises (BOOST) circuit that boosts, and usually generally is connected with booster circuit in the rear end of battery 140, externally powers afterwards so that cell voltage is boosted.For instance; described BOOST circuit is just started working before generally can returning at the positive pole voltage over the ground of battery and being scheduled to withdraw from voltage threshold; its work power consumption is far longer than the weak current of battery output under the described overcurrent protection state; the positive pole of battery voltage difference over the ground can't be elevated to the predetermined voltage threshold that withdraws from that recovers normal power supply like this; after causing portable power source output current overload, it is normal that system also can't recover.
Described booster circuit comprises the output circuit that boosts, the bleeder circuit that boosts, boost control circuit and booster power supply circuit.The described inductance L 1 of output circuit of boosting, a nmos pass transistor MN1 (or claiming power tube), a diode D1, one end of inductance L 1 links to each other with the positive pole of battery, the other end links to each other with the anode of diode D1, the negative electrode of diode D1 is the output VOUT of described booster circuit, the grid of described nmos pass transistor receives output control signal (EXT end) from described boost control circuit as the control end of the output circuit that boosts, the drain electrode of described nmos pass transistor MN1 links to each other with the intermediate node of inductance L 1 with diode D1, and the source electrode of described nmos pass transistor MN1 is connected to the ground.The described bleeder circuit that boosts comprises that the second resistance R 2 of being connected between output VOUT and the ground and the intermediate node of the 3rd resistance R 3, the second resistance R 2 and the 3rd resistance R 3 link to each other with the feedback end FB of described boost control circuit, and being used for provides feedback voltage to it.
Described booster power supply circuit comprises resistance R 1 and the capacitor C 2 that is connected between anode and the ground; node between the two is connected to the power end VDD of described boost control circuit; the test side LX of described boost control circuit connects the node between described inductance L 1 and the diode D1; the earth terminal GND ground connection of described boost control circuit, the Enable Pin EN of described boost control circuit links to each other with the control of discharge output D OUT of described battery protecting circuit 120 by resistance R 4.In when work, described boost control circuit according to feedback voltage produce described output control signal to the grid of described nmos pass transistor so that whole booster circuit is controlled, so that the output VOUT of described booster circuit obtains suitable output voltage.
Booster circuit among Fig. 2 in the utility model can also adopt the booster circuit of other types of the prior art, or the control circuit of other types.The Enable Pin EN of especially different from common boost control circuit is described boost control circuit no longer is connected to the output OUT of described booster circuit 150, but links to each other with the control of discharge output D_OUT of described battery protecting circuit 120 by resistance R 4.Like this, the discharge control signal of forbidding of described control of discharge output D_OUT output just can be so that boost control circuit quits work, the permission discharge control signal that described control of discharge output D_OUT exports just can so that boost control circuit start working.
In one embodiment, it is the megohm rank that resistance R 4 is recommended value, and the voltage of the Enable Pin EN of described boost control circuit is higher than 2V, and it just can enable work, is lower than 1V and namely forbids described boost control circuit work.If described battery protecting circuit allows the normal supplying power for outside of battery, D_OUT can draw high and be higher than 2V, also allows booster circuit startup work this moment; If described battery protecting circuit is in when forbidding discharge prevention; D_OUT is pulled low to the current potential of battery cathode BATN; the current potential of the negative pole BATN of battery is negative potential relatively at this moment; if directly D_OUT is connected to the Enable Pin of described boost control circuit; have larger electric current by described Enable Pin EN from systematically flowing to described control of discharge output D_OUT; cause easily circuit malfunction even damage; so increase current-limiting resistance R4 here, this electric leakage be restricted in safety and the acceptable scope of performance.Certainly, in one embodiment, also can directly described control of discharge output D_OUT be connected to the Enable Pin EN of described boost control circuit, each following embodiment also can skip resistance R 4 and directly D_OUT be linked to each other with Enable Pin EN.
Fig. 3 is the internal load circuit among Fig. 1 and cooperates circuit circuit block diagram in a second embodiment that described internal load circuit still comprises booster circuit.
In Fig. 2; under the discharge over-current state; still there are the resistance R 2 and the R3 that are connected between output VOUT and the ground in running order; this still can produce certain load current; thereby may be so that the weak current of described battery can not be charged to described capacitor C 1, the discharge prevention state is normally withdrawed from impact.Therefore; booster circuit as shown in Figure 3 is with the difference of the booster circuit shown in Fig. 2: in the described bleeder circuit that the boosts enable circuits of connecting; the control end of this enable circuits also links to each other with the control of discharge output D_OUT of described battery protecting circuit 120 by described resistance R 4, and all the other both structures are similar.
The discharge control signal of forbidding of described control of discharge output D_OUT output not only can so that boost control circuit quit work, can also enable the described bleeder circuit that boosts and quit work, thereby further reduce the internal load electric current.The permission discharge control signal of described control of discharge output D_OUT output not only can so that boost control circuit start working, can also so that the described bleeder circuit that boosts begin to work.
As shown in Figure 3, the enable circuits of the described bleeder circuit that boosts is the effect that a nmos pass transistor MN2(plays switch at this moment, also can be referred to as switch), the grid of this nmos pass transistor MN2 is control end, it ends when discharge control signal is forbidden in described control of discharge output D_OUT output, conducting when described control of discharge output D_OUT output allows discharge control signal.
Fig. 4 is the internal load circuit among Fig. 1 and cooperates the circuit block diagram of circuit in the 3rd embodiment that described internal load circuit still comprises booster circuit.Booster circuit as shown in Figure 4 and the structure major part of the booster circuit shown in Fig. 3 are similar, its main distinction is: made the enable circuits of the described bleeder circuit that boosts into inverter INV1 by nmos pass transistor MN2, the low level of this inverter INV1 output is ground.The input of described inverter INV1 links to each other with the control of discharge output D_OUT of described battery protecting circuit 120 by described resistance R 4, and the output of described inverter INV1 links to each other with an end of described resistance R 3.
Output high level when described inverter INV1 forbids discharge control signal in described control of discharge output D_OUT output, bleeder circuit is not worked so that boost, output low level when described control of discharge output D_OUT output allows discharge control signal is so that the bleeder circuit normal operation of boosting.
Fig. 5 is the internal load circuit among Fig. 1 and cooperates the circuit block diagram of circuit in the 4th embodiment that described internal load circuit still comprises booster circuit.Booster circuit shown in Fig. 5 comprises with the something in common of the booster circuit shown in Fig. 3: in the described bleeder circuit that the boosts enable circuits of connecting, the control end of this enable circuits also links to each other with the control of discharge output D_OUT of described battery protecting circuit 120 by described resistance R 4.Booster circuit shown in Fig. 5 is with the difference of the booster circuit shown in Fig. 3: 1) enable circuits of the bleeder circuit that boosts among Fig. 5 links to each other with the earth terminal GND of described boost control circuit with node between one of them divider resistance R3, the Enable Pin EN of described boost control circuit meets described output VOUT, then is not such connected mode among Fig. 3; 2) also be in series with the enable circuits that enables described power tube MN1 between power tube MN1 and ground, the control end of this enable circuits also links to each other with the control of discharge output D_OUT of described battery protecting circuit 120 by described resistance R 4.
When the described permission discharge control signal of described control of discharge output output, the control end of the enable circuits by the described bleeder circuit that boosts is so that the direct ground connection of node between the enable circuits of the described bleeder circuit that boosts and the divider resistance R3, described like this bleeder circuit and the described boost control circuit of boosting can both work, the control end of the enable circuits by power tube MN1 so that described power tube MN1 can work.In that the output of described control of discharge output is described when forbidding discharge control signal, the control end of the enable circuits by the described bleeder circuit that boosts so that the node between the enable circuits of the described bleeder circuit that boosts and one of them the divider resistance R3 disconnect with ground, described like this bleeder circuit and the described boost control circuit of boosting all quit work, the control end of the enable circuits by power tube MN1 is so that described power tube MN1 can't work, and the load current of described like this internal load circuit has just reduced a lot.
As shown in Figure 5, the enable circuits of the described bleeder circuit that boosts is a nmos pass transistor MN2, the grid of this nmos pass transistor MN2 is control end, it ends when discharge control signal is forbidden in described control of discharge output D_OUT output, conducting when described control of discharge output D_OUT output allows discharge control signal.The enable circuits of described power tube MN1 is a nmos pass transistor MN3, the grid of this nmos pass transistor MN3 is control end, it ends when discharge control signal is forbidden in described control of discharge output D_OUT output, conducting when described control of discharge output D_OUT output allows discharge control signal.
Fig. 6 is the internal load circuit among Fig. 1 and cooperates the circuit block diagram of circuit in the 5th embodiment that described internal load circuit still comprises booster circuit.Booster circuit as shown in Figure 6 and the difference of the booster circuit shown in Fig. 5 are: made the enable circuits of the described bleeder circuit that boosts into inverter INV1 by nmos pass transistor, the low level of this inverter INV1 output is ground.The input of described inverter INV1 links to each other with the control of discharge output D_OUT of described battery protecting circuit 120 by described resistance R 4, and the output of described inverter INV1 links to each other with an end of described resistance R 3.
Described inverter INV1 described control of discharge output D_OUT output forbid discharge control signal the time output high level, bleeder circuit is not worked so that boost, also so that described boost control circuit do not work, output low level when the permission discharge control signal of described control of discharge output D_OUT output, the bleeder circuit normal operation so that boost is also so that the normal operation of described boost control circuit.
Certainly in other embodiments, can also make the nmos pass transistor MN3 in Fig. 5 and 6 into inverter.
In above-mentioned example; introduce take the internal load circuit as booster circuit as example; described internal load circuit can also be other any internal load circuit obviously; as long as this circuit produces the part of load current in described portable power source withdraws from the process of discharge overcurrent protection state; all need to enable or disable control according to the discharge control signal of described control of discharge output D_OUT output; to produce the little load current of trying one's best in the process that withdraws from discharge overcurrent protection state at described portable power source, even do not produce any electric current.Such as be connected on output voltage VO UT and between other resistance string, also needing to connect, enable circuits is carried out so that it begins or quits work.
In sum; internal load circuit portable power source in the utility model turn-offs battery after entering discharge overcurrent protection state after; the faint output current of described battery output under discharge overcurrent protection state; this faint electric current charges to improve constantly the cathode voltage of described battery to an electric capacity; thereby finally can reach the condition that withdraws from the discharge overcurrent protection; realize automatically withdrawing from discharge overcurrent protection state, so that the normal supplying power for outside of battery, thereby user-friendly.
Enabling expression in the utility model makes its work, disable represent to make it not work.
Above-mentioned explanation has fully disclosed embodiment of the present utility model.It is pointed out that and be familiar with the scope that any change that the person skilled in art does embodiment of the present utility model does not all break away from claims of the present utility model.Correspondingly, the scope of claim of the present utility model also is not limited only to previous embodiment.
Claims (11)
1. portable power source, it comprises battery protecting circuit, battery, switch combination circuit and internal load circuit, described battery is externally powered via described internal load circuit,
Whether described battery protecting circuit detects the discharge of described battery unusual, and if so, then discharge control signal is forbidden in output, and if not, then output allows discharge control signal;
Described switch combination circuit cuts off the discharge loop of described battery based on the described discharge control signal of forbidding, based on allowing discharge control signal to be communicated with the discharge loop of described battery;
It is characterized in that, according to the described discharge control signal of forbidding described internal load circuit is quit work, according to described permission discharge control signal described internal load circuit is started working.
2. portable power source according to claim 1, it is characterized in that, described internal load circuit comprises booster circuit, this booster circuit comprises boost control circuit, according to the described discharge control signal of forbidding described boost control circuit is quit work, according to described permission discharge control signal described boost control circuit is started working.
3. portable power source according to claim 2; it is characterized in that; described battery protecting circuit is exported described permission discharge control signal and the described discharge control signal of forbidding by the control of discharge output; described control of discharge output directly links to each other with the Enable Pin of described boost control circuit or links to each other with the Enable Pin of described boost control circuit by a resistance; when the described permission discharge control signal of described control of discharge output output; Enable Pin by described boost control circuit enables described boost control circuit; in that the output of described control of discharge output is described when forbidding discharge control signal, by the described boost control circuit of described Enable Pin disable.
4. portable power source according to claim 2, it is characterized in that, this booster circuit also comprises the bleeder circuit that boosts, and according to the described discharge control signal of forbidding the described bleeder circuit that boosts is quit work, and according to described permission discharge control signal the described bleeder circuit that boosts is started working.
5. portable power source according to claim 4; it is characterized in that; described battery protecting circuit is exported described permission discharge control signal and the described discharge control signal of forbidding by the control of discharge output; the described bleeder circuit that boosts comprises series connection enable circuits in the inner; described control of discharge output directly links to each other with the Enable Pin of described boost control circuit or links to each other with the Enable Pin of described boost control circuit through a resistance; described control of discharge output also directly links to each other with the control end of the enable circuits of the described bleeder circuit that boosts or links to each other with the control end of enable circuits in being series at the described bleeder circuit that boosts through a resistance
When the described permission discharge control signal of described control of discharge output output, Enable Pin by described boost control circuit enables described boost control circuit, control end by the enable circuits in the described bleeder circuit that boosts enables the described bleeder circuit that boosts, in that the output of described control of discharge output is described when forbidding discharge control signal, by the described boost control circuit of Enable Pin disable of described boost control circuit, by the described bleeder circuit that boosts of the control end disable of the enable circuits in the described bleeder circuit that boosts.
6. portable power source according to claim 5, it is characterized in that, the described bleeder circuit that boosts comprises the output voltage that is connected on described portable power source and two divider resistances between the ground, the switch of the enable circuits of the described bleeder circuit that boosts for connecting with described divider resistance, the control end of described switch is the control end of the enable circuits of the described bleeder circuit that boosts.
7. portable power source according to claim 5, it is characterized in that, the described bleeder circuit that boosts comprises the output voltage that is connected on described portable power source and two divider resistances between its enable circuits, the enable circuits of the described bleeder circuit that boosts is inverter, the input of described inverter is the control end of the enable circuits of the described bleeder circuit that boosts, and the low level of described inverter output is ground.
8. portable power source according to claim 4, it is characterized in that, described booster circuit comprises the output circuit that boosts, this output circuit that boosts include power tube and be connected on power tube and ground between so that enable circuits that can described power tube, the described bleeder circuit that boosts comprises enable circuits and is connected on the output voltage of described portable power source and two divider resistances between its enable circuits, described control of discharge output directly links to each other with the control end of the enable circuits of the bleeder circuit that boosts or the control end by a resistance and described enable circuits, described control of discharge output also links to each other with the control end of enable circuits of power tube in the output circuit that boosts, the enable circuits of bleeder circuit of boosting links to each other with the earth terminal of described boost control circuit with node between one of them divider resistance
When the described permission discharge control signal of described control of discharge output output, the control end of the enable circuits by the described bleeder circuit that boosts is so that the direct ground connection of that node between the enable circuits of the described bleeder circuit that boosts and one of them divider resistance, the bleeder circuit and enable described boost control circuit so that can be described boost, the control end of the enable circuits by the power tube in the described output circuit that boosts is so that can described power tube
In that the output of described control of discharge output is described when forbidding discharge control signal, the control end of the enable circuits by the described bleeder circuit that boosts so that node between the enable circuits of the described bleeder circuit that boosts and one of them divider resistance disconnect with ground, with described bleeder circuit and the described boost control circuit of disable of boosting of disable, the control end of the enable circuits by the power tube in the described output circuit that boosts is with the described power tube of disable.
9. portable power source according to claim 10, it is characterized in that, the enable circuits of described boost bleeder circuit or described power tube is switch, a link of described switch connects ground, another link connects a link of one of them divider resistance or power tube, and the control end of described switch is the control end of described enable circuits; Perhaps the enable circuits of described boost bleeder circuit or described power tube is inverter, the output of described inverter connect one of them divider resistance or or a link of power tube, the input of described inverter is the control end of described enable circuits, and the low level of described inverter output is ground.
10. portable power source according to claim 4 is characterized in that, described booster circuit also includes the output circuit that boosts, and the output of this output circuit that boosts is as the output of portable power source,
Described boost control circuit has test side, feedback end, Enable Pin, control output end, power end and earth terminal, described feedback end receives the described bleeder circuit that boosts and obtains feedback voltage, it obtains exporting control signal according to described feedback voltage, and export described output control signal by described control output end and give the described output circuit that boosts
The described output circuit that boosts obtains suitable output voltage under the control of described boost control circuit.
11. portable power source according to claim 1; it is characterized in that, under discharge overcurrent protection state, between the negative pole of battery and ground, keep a very weak discharge path; so that described battery still can be exported described weak current, this weak current be milliampere and following level other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201220346890 CN202906496U (en) | 2012-06-19 | 2012-07-17 | Mobile power supply |
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| CN201210203612.1 | 2012-06-19 | ||
| CN201210203612 | 2012-06-19 | ||
| CN 201220346890 CN202906496U (en) | 2012-06-19 | 2012-07-17 | Mobile power supply |
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| CN202906496U true CN202906496U (en) | 2013-04-24 |
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| CN201210248747.XA Active CN102761161B (en) | 2012-06-19 | 2012-07-17 | Mobile power supply |
| CN 201220346890 Expired - Lifetime CN202906496U (en) | 2012-06-19 | 2012-07-17 | Mobile power supply |
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| CN201210248747.XA Active CN102761161B (en) | 2012-06-19 | 2012-07-17 | Mobile power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761161A (en) * | 2012-06-19 | 2012-10-31 | 无锡中星微电子有限公司 | Mobile power supply |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983556B (en) * | 2012-11-22 | 2016-03-09 | 无锡中星微电子有限公司 | There is the battery protecting circuit of self-recovering function after electric discharge overcurrent protection |
| TWI485948B (en) * | 2013-06-07 | 2015-05-21 | Asustek Comp Inc | Power system and short protection circuit thereof |
| CN104753182A (en) * | 2013-12-30 | 2015-07-01 | 南京理工大学常熟研究院有限公司 | Environmental radio-frequency energy collector |
| CN104617782B (en) * | 2014-12-25 | 2017-12-12 | 广东美的制冷设备有限公司 | Anti-surging current device, Anti-surging current methods and household electrical appliance |
| EP3258567B1 (en) * | 2015-03-10 | 2018-09-19 | Huawei Technologies Co., Ltd. | Self-loop detection method and apparatus for charging device |
| CN113794367B (en) * | 2021-09-13 | 2024-08-20 | 深圳威迈斯新能源(集团)股份有限公司 | Power supply with anti-surge function, control method thereof and vehicle-mounted charger |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3431867B2 (en) * | 1999-09-21 | 2003-07-28 | 松下電器産業株式会社 | Battery power supply device and electric equipment using the same |
| CN2768266Y (en) * | 2004-11-15 | 2006-03-29 | 比亚迪股份有限公司 | Overcurrent protection circuit |
| CN101447666B (en) * | 2007-11-27 | 2013-10-30 | 深圳迈瑞生物医疗电子股份有限公司 | Power supply system and power overvoltage safety protection control method |
| CN101739938A (en) * | 2008-11-04 | 2010-06-16 | 北京同方微电子有限公司 | Driving power circuit for vacuum fluorescent display |
| KR101097262B1 (en) * | 2009-12-28 | 2011-12-21 | 삼성에스디아이 주식회사 | Battery pack, how to charge it |
| CN102761161B (en) * | 2012-06-19 | 2014-07-02 | 无锡中星微电子有限公司 | Mobile power supply |
-
2012
- 2012-07-17 CN CN201210248747.XA patent/CN102761161B/en active Active
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761161A (en) * | 2012-06-19 | 2012-10-31 | 无锡中星微电子有限公司 | Mobile power supply |
| CN102761161B (en) * | 2012-06-19 | 2014-07-02 | 无锡中星微电子有限公司 | Mobile power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102761161A (en) | 2012-10-31 |
| CN102761161B (en) | 2014-07-02 |
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Address after: 214028 10th Floor, Area A, 530 Building, Qingjia Road, Taihu International Science Park, Wuxi New District, Jiangsu Province Patentee after: Zgmicro Corporation Address before: 214028 10th Floor, Area A, 530 Building, Qingjia Road, Taihu International Science Park, Wuxi New District, Jiangsu Province Patentee before: WUXI VIMICRO Corp. |
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Granted publication date: 20130424 |
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