CN104716715A - Multi-battery-based power supply circuit and electronic product with power supply circuit - Google Patents
Multi-battery-based power supply circuit and electronic product with power supply circuit Download PDFInfo
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- CN104716715A CN104716715A CN201510153913.1A CN201510153913A CN104716715A CN 104716715 A CN104716715 A CN 104716715A CN 201510153913 A CN201510153913 A CN 201510153913A CN 104716715 A CN104716715 A CN 104716715A
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Abstract
The invention discloses a multi-battery-based power supply circuit and an electronic product with the power supply circuit. N charge batteries are arranged, and N power supply voltages output by positive electrodes of the N batteries are respectively transmitted to electricity load via a reverse bias prevention diode; a charge loop of each battery is connected with a switch circuit, and a first switch circuit in a charge loop connected to the first battery is communicated with a charge loop communicated of the first battery when a charge power supply is connected on a charge interface; the subsequent N-1 switch circuits respectively act when the previous battery is charged fully so as to control the subsequent N-1 batteries to be charged sequentially. According to the invention, the problem of flow backward charge among the batteries when the electronic product is normally used can be solved, each battery can be charged fully by adopting the design mode that multiple batteries are charged one by one sequentially, so that the battery capacity is enhanced further, and the time of endurance of the electronic product can be prolonged.
Description
Technical field
The invention belongs to power circuit technical field, specifically, the electronic product relating to a kind of power circuit based on polylith battery design and adopt this power circuit to design.
Background technology
Along with the progress of science and technology, dress electronic product favor by increasing consumer and widely use, the function achieved by it is also increasing.Due to increasing of function, need integrated electronic unit in wearing electronic product also to increase thereupon, then cause the power consumption of this electronic product to increase thereupon.In order to ensure that the cruising time of dressing electronic product obviously can not reduce because of increasing of function, need the capacity promoting such interiors of products battery, to meet the demand that consumer's long-time continuous uses.
At present, in order to improve battery capacity, modal method is that the cell parallel of employing two pieces or more polylith forms power circuit, an electricity consumption load supplying being all electronic product inside.Problem existing for this cell parallel scheme is: must select battery behavior and the identical polylith battery of cell voltage directly could carry out Parallel Design, once be connected in parallel two pieces of cell voltages are different or bulk properties are incomplete same, then in use there will be the phenomenon that the high battery of voltage charges to the battery that voltage is low, therefore can not export the due battery capacity of each block battery, cause the reduction of battery utilance.In addition, in the design phase of electronic product, want to pick out battery behavior and cell voltage identical polylith battery is also more difficult, therefore adopt the power circuit designed by this cell parallel scheme, its actual service condition is unsatisfactory.
Summary of the invention
The present invention is in order to solve existing employing by direct for polylith battery parallel connection to the problems referred to above existing for the technical scheme promoting battery capacity, propose the design of a kind of circuit construction of electric power based on many batteries, not only avoid the high battery of in use voltage pours in down a chimney problem from charging to the battery that voltage is low, achieve the maximization of each block battery capacity utilance, and requirement is also reduced in the selection of battery types, reduce the difficulty of circuit design.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
Based on a power circuit for many batteries, described battery is rechargeable battery, is provided with N block, N be greater than 1 positive integer; The N road supply power voltage exported by the positive pole of N block battery transfers to by electric loading via the anti-back biased diode in N road correspondingly; A switching circuit is connected in the charge circuit of each block battery, wherein, when the first switching circuit be connected in the charge circuit of first piece of battery has charge power supply to access on charging inlet, be communicated with the charge circuit of first piece of battery, utilize described charge power supply to be first piece of battery charging; Be connected to the action when i-th piece of battery is full of electricity of i-th in the charge circuit of the i-th+1 piece battery+1 switching circuit, be communicated with the charge circuit of the i-th+1 piece battery, utilize described charge power supply to be the i-th+1 piece battery charging, described i=1,2 ..., N-1.
In order to realize charging in turn one by one of N block battery, N-1 comparison circuit is provided with in described power circuit, connect one to one with other N-1 switching circuit except described first switching circuit respectively, when i-th comparison circuit detects that the cathode voltage of i-th piece of battery is greater than the i-th reference voltage after dividing potential drop, judge that i-th piece of battery is full of electricity, output switching signal controls the i-th+1 switching circuit action, is communicated with the charge circuit of the i-th+1 piece battery.
As a kind of preferred electrical architecture design of described comparison circuit, a comparator is provided with in comparison circuit described in each, the cathode voltage of described i-th piece of battery is acted on the in-phase input end of i-th comparator via the partial pressure value formed after a resistance pressure-dividing network dividing potential drop, the i-th reference voltage that one DC power supply is formed after another electric resistance partial pressure networking dividing potential drop is acted on the inverting input of i-th comparator, the resistance of the divider resistance in resistance pressure-dividing network described in configuration two-way, make i-th piece of battery only when being full of electricity, the partial pressure value of its cathode voltage is greater than the i-th described reference voltage, described switching signal is exported to the i-th+1 described switching circuit by the output of i-th comparator.
Further, described DC power supply connects the power supply terminal of each comparator, for comparator is powered; The output of each comparator, each via the DC power supply described in pull-up resistor connection, stablizes the high level amplitude exported by comparator.
Preferably, described DC power supply can be generated by voltage stabilizing circuit conversion by the supply power voltage transferring to described electric loading.
Preferably, the anode of the anti-back biased diode in described N road is connected one to one with the positive pole of N block battery, and the negative electrode of the anti-back biased diode in N road is connected to same road discharge and recharge interface; Switching circuit at the two ends of the anti-back biased diode in each road respectively described in one in parallel.
As a kind of preferred electrical architecture design of described switching circuit, a P channel MOS tube and a N-channel MOS pipe is provided with in switching circuit described in each, the drain electrode of described P channel MOS tube connects the positive pole of battery, discharge and recharge interface described in source electrode connects, grid connects the drain electrode of N-channel MOS pipe, and the discharge and recharge interface described in being connected by current-limiting resistance; The source ground of described N-channel MOS pipe, the switching signal that the charge power supply described in grid receives or described comparison circuit export.
Further, described discharge and recharge interface can directly with described charging inlet be connected by electric loading, also can be connected with a charging management chip, namely, in described power circuit, can a charging management chip be set further, connect described charging inlet, discharge and recharge interface and by electric loading respectively, described charging management chip detect described charging inlet has charge power supply to access time, charge power supply is transferred to respectively described discharge and recharge interface and by electric loading, for described battery charges, and it is electricity consumption load supplying; When described charging management chip detect described charging inlet accesses without charge power supply time, battery is transferred to described use electric loading by the supply power voltage that described discharge and recharge interface exports, utilizes battery for electricity consumption load supplying.
According to the above-mentioned design of the circuit construction of electric power based on many batteries, the invention allows for described in a kind of employing based on the electronic product that the power circuit of many batteries designs, be provided with power circuit and by electric loading, wherein, in described power circuit, be provided with N block rechargeable battery, N be greater than 1 positive integer; The N road supply power voltage exported by the positive pole of N block battery transfers to by electric loading via the anti-back biased diode in N road correspondingly; A switching circuit is connected in the charge circuit of each block battery, wherein, when the first switching circuit be connected in the charge circuit of first piece of battery has charge power supply to access on charging inlet, be communicated with the charge circuit of first piece of battery, utilize described charge power supply to be first piece of battery charging; Be connected to the action when i-th piece of battery is full of electricity of i-th in the charge circuit of the i-th+1 piece battery+1 switching circuit, be communicated with the charge circuit of the i-th+1 piece battery, utilize described charge power supply to be the i-th+1 piece battery charging, described i=1,2 ..., N-1.Can ensure thus after last piece of battery is full of electricity, rear one piece of battery just starts charging, achieves the Charge Management process that a kind of N block battery charges one by one in turn.
Compared with prior art, advantage of the present invention and good effect are: the present invention is directed in electronic product the situation designing power supply circuit being provided with polylith battery, by connecting anti-back biased diode at the positive pole of each block battery, the battery that can prevent electronic product from occurring that in the normal process used voltage is high pours in down a chimney the problem of charging to the battery that voltage is low, not only can ensure that each block battery can export its due battery capacity, promote the utilance of battery capacity, and too high requirement is not had in the type selecting of battery, even if selected battery is incomplete same in bulk properties and output voltage, as long as difference not quite can meet design requirement, thus reduce the difficulty in battery type selecting, simplify hardware designs.In addition, the present invention by arranging switching circuit in the charge circuit of each block battery, the charging sequential of each block battery is controlled by switching circuit, rear one piece of battery is made only just to start charging when last piece of battery is full of electricity, can ensure that each block battery can be full of electricity thus, then achieve the further lifting of battery capacity, contribute to the cruising time extending electronic product, be especially applicable to being applied in and dress in electronic product.
After reading the detailed description of embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of a kind of embodiment of the power circuit based on many batteries proposed by the invention;
Fig. 2 is the circuit theory diagrams of a kind of specific embodiment of power circuit shown in Fig. 1;
Fig. 3 is the schematic block circuit diagram of a kind of embodiment of charging management chip and peripheral circuit thereof.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in more detail.
The present embodiment is for the design of electronic products power circuit being built-in with polylith battery, in order to ensure that each block battery can export its due battery capacity, the present embodiment sets up an anti-back biased diode respectively in the supply power voltage outlet line of each block battery, utilize the reverse cut-off characteristics of diode, prevent electronic product in use, the battery that voltage is high pours in down a chimney charging to the battery that voltage is low, and then achieves the maximum using of battery capacity.
Shown in Figure 1, to be provided with N block battery, (described N block battery is rechargeable battery, such as N block lithium battery) electronic product be that example is described, described N be greater than 1 positive integer, then need adopt N number of anti-back biased diode D1, D2 ... DN and N block battery connects one to one, specifically can by N number of anti-back biased diode D1, D2 ... the anode of DN is connected one to one with the positive pole of N block battery respectively, by N number of anti-back biased diode D1, D2 ... the negative electrode of DN is all connected to discharge and recharge interface VBAT.When output voltage higher than other batteries of the output voltage of wherein one piece of battery, due to the existence of anti-back biased diode, stopping is exported supply power voltage by the battery that voltage is low, by the high battery of voltage separately to the electricity consumption load supplying of electronic product inside; Further, the electric current exported by the battery that voltage is high can not flow to the low battery of voltage, can ensure that each block battery can export its due battery capacity thus, ensure that making full use of of battery capacity.
In addition, in order to ensure that each block battery can be full of electricity in electronic product charging process, the present embodiment sets up a switching circuit respectively in the charge circuit of each block battery, as shown in Figure 1, specifically the switch ways of N number of switching circuit can be connected in parallel on correspondingly N number of anti-back biased diode D1, D2, the two ends of DN, the charge power supply utilizing the charging inlet VBUS of electronic product to introduce controls the first switching circuit (switching circuit 1) action, when having charge power supply to access in outside, be communicated with the charge circuit of first piece of battery (battery 1), outside charge power supply is utilized first to charge for battery 1.Now, other each path switching circuits keep off state, thus make remaining N-1 block battery to enter charge mode.
For second switch circuit (switching circuit 2), design its conducting when battery 1 is full of electricity, be communicated with the charge circuit of second piece of battery (battery 2), outside charge power supply is utilized to charge for battery 2, until when battery 2 is full of electricity, 3rd switching circuit (switching circuit 3) action, then controlling charge power supply is the 3rd piece of battery (battery 3) charging ... by that analogy, until after N-1 block battery is full of electricity, N switching circuit (switching circuit N) conducting, controlling charge power supply is that battery N charges.Thus, charging in turn one by one of N block battery is just achieved.
The design of the present embodiment by adopting rear one piece of battery to enter charge mode again after last piece of battery is full of electricity, can ensure that each the block battery in electronic product can be full of electricity thus, compare the design that tradition adopts battery directly in parallel, farthest can promote the overall charge volume of battery pack, extend the cruising time of electronic product.
In order to control switch circuit 2 to switching circuit N can row conducting again after last piece of battery is full of electricity, the present embodiment arranges N-1 road comparison circuit in a power, as shown in Figure 1, be defined as comparison circuit 1, comparison circuit 2 ..., comparison circuit N-1.N-1 road comparison circuit and other N-1 path switching circuits except switching circuit 1 are connected one to one, respectively break-make control is carried out to described N-1 path switching circuit.Specifically, when can be full of electricity according to battery 1, corresponding cell voltage VBAT_1 determines suitable first reference voltage Vref _ 1 in advance, utilize comparison circuit 1 to detect the cathode voltage of battery 1, namely described cathode voltage equals below cell voltage VBAT_1(represents battery 1 cathode voltage with VBAT_1).When the partial pressure value that the cathode voltage VBAT_1 of battery 1 obtains after dividing potential drop is less than the first described reference voltage Vref _ 1, think that underfill electricity gone back by battery 1, comparison circuit 1 exports invalid switching signal ON/OFF_1(such as low level signal) to switching circuit 2, control switch circuit 2 maintains off state, now, battery 2 is in the state of not charging and also not discharging, and can directly utilize outside charge power supply to be the electricity consumption load supplying in electronic product.After battery 1 charges a period of time, when the partial pressure value that its cathode voltage VBAT_1 obtains after dividing potential drop is more than or equal to the first described reference voltage Vref _ 1, think that battery 1 is full of electricity, comparison circuit 1 exports effective switching signal ON/OFF_1(such as high level signal) to switching circuit 2, control switch circuit 2 conducting, be communicated with the charge circuit of battery 2, charge power supply is started as battery 2 charges.Now, can still be provided by the charge power supply of outside by the working power needed for electric loading.In like manner, according to battery 2, battery 3 ..., the cell voltage VBAT_2 corresponding when being full of electricity of battery N-1, VBAT_3 ... VBAT_N-1, pre-determine respectively with it corresponding suitable reference voltage Vref _ 2, Vref_3 ..., Vref_N-1.Detected the cathode voltage VBAT_2 of battery 2 by comparison circuit 2, judge whether battery 2 is full of electricity in conjunction with reference voltage Vref _ 2, and when detecting that battery 2 is full of electricity, control switch circuit 3 conducting, makes charge power supply be that battery 3 charges.By that analogy, until after comparison circuit N-1 detects that battery N-1 is full of electricity, control switch circuit N conducting, utilizes charge power supply to charge for battery N, until N block battery is all full of electricity, thus achieves the control procedure of N block battery order charging successively.
As a kind of preferred circuit design of the present embodiment, described comparison circuit can adopt comparator to coordinate simple periphery circuit design to form, and described switching circuit can adopt a N-channel MOS pipe and a P channel MOS tube to be formed by connecting.To be provided with two pieces of batteries J1, J2 in electronic product, the comparison circuit of the present embodiment and the concrete assembling structure of switching circuit are described in detail, shown in Figure 2.
In Fig. 2, P channel MOS tube Q1 coordinates N-channel MOS pipe Q2 to form the first switching circuit, is connected in the charge circuit of first piece of battery J1.Specifically, the source electrode of P channel MOS tube Q1 and drain electrode can be connected in parallel on the two ends of anti-back biased diode D1, the drain electrode of P channel MOS tube Q1 is utilized to be connected the positive pole of first piece of battery J1 with the anode of anti-back biased diode D1, the negative electrode of the source electrode of P channel MOS tube Q1 and anti-back biased diode D1 is connected to discharge and recharge interface VBAT, the grid of P channel MOS tube Q1 is leaded up to current-limiting resistance R2 and is connected to described discharge and recharge interface VBAT, and another road connects the drain electrode of N-channel MOS pipe Q2.By the source ground of described N-channel MOS pipe Q2, grid connects the charging inlet VBUS of electronic product, or after the charge power supply that the charging inlet VBUS by electronic product introduces is utilized resistance R3 and resistance R4 dividing potential drop, then be applied to the grid of described N-channel MOS pipe Q2.
In like manner, adopt P channel MOS tube Q3 to coordinate N-channel MOS pipe Q4 to form second switch circuit, be connected in the charge circuit of second piece of battery J2.Specifically, the source electrode of P channel MOS tube Q3 and drain electrode can be connected in parallel on the two ends of anti-back biased diode D2, wherein, the drain electrode of P channel MOS tube Q3 is connected the positive pole of second piece of battery J1 with the anode of anti-back biased diode D2, the source electrode of P channel MOS tube Q3 and the negative electrode of anti-back biased diode D2 are connected to discharge and recharge interface VBAT, the grid of P channel MOS tube Q3 is leaded up to current-limiting resistance R1 and is connected to described discharge and recharge interface VBAT, and another road connects the drain electrode of N-channel MOS pipe Q4.By the source ground of described N-channel MOS pipe Q4, grid connects comparison circuit, receives the switching signal that comparison circuit exports.
In the comparison circuit of the present embodiment, be provided with a comparator U1, by the divider node of the in-phase input end of described comparator U1+be connected to the first resistance pressure-dividing network, utilize the cathode voltage VBAT_1 of the first resistance pressure-dividing network to first piece of battery J1 to carry out dividing potential drop; By the divider node of the inverting input of described comparator U1-be connected to the second resistance pressure-dividing network, after utilizing the second resistance pressure-dividing network to carry out dividing potential drop to a DC power supply VCC, obtain the first reference voltage Vref _ 1.In the present embodiment, resistance R8, R9 can be adopted to be connected to form the first resistance pressure-dividing network, be connected to first piece of battery J1 positive pole and systematically between; Adopt resistance R6, R7 to be connected to form the second resistance pressure-dividing network, be connected to DC power supply VCC and systematically between.The resistance of configuration divider resistance R6, R7 and divider resistance R8, R9, make the cathode voltage VBAT_1 of first piece of battery J1 only when first piece of battery J1 is full of electricity, it is greater than in the partial pressure value that the intermediate node place of resistance R8, R9 is formed the first reference voltage Vref _ 1 that DC power supply VCC formed at the intermediate node place of resistance R6, R7.
In the present embodiment, can set each block battery charge arrive its full capacity more than 90% time think and be full of electricity, according to first piece of battery J1 charge arrive its full capacity 90% time corresponding cathode voltage VBAT_1 to determine the amplitude of the first reference voltage Vref _ 1 through the partial pressure value that divider resistance R8, R8 are formed, and then the resistance of divider resistance R6, R7 is configured according to the magnitude of voltage of DC power supply VCC, the partial pressure value that DC power supply VCC is formed after divider resistance R6, R7 dividing potential drop just equals the amplitude of the first determined reference voltage Vref _ 1.Just whether power circuit is full of electricity automatic detection and Identification to battery J1 can be realized thus.
In Fig. 2, be connected to comparator U1 inverting input-and systematically between shunt capacitance C1 can filtering interfering, play the effect making the first reference voltage Vref _ 1 stable.
In the present embodiment, described DC power supply VCC can adopt and arrange a voltage stabilizing circuit in electronic product inside, (described supply power voltage may be provided by battery to utilize the supply power voltage transferred to by electric loading, the charge power supply that also may be inputted by outside provides) mode of carrying out voltage stabilizing conversion through described voltage stabilizing circuit generates, such as, by 3.0V direct voltage that voltage stabilizing circuit conversion generates.Simultaneously, described DC power supply VCC is utilized to power for comparator U1, and the output of comparator U1 is connected to by pull-up resistor R5, the output of comparator U1 is connected to the grid of N-channel MOS pipe Q2 by current-limiting resistance R4, break-make control is carried out to N-channel MOS pipe Q2.By described DC power supply VCC by shunt capacitance C2 ground connection, utilize the filter action of electric capacity C2 that DC power supply VCC can be made more stable, to promote the stability of whole power circuit work.
The operation principle of power circuit shown in Fig. 2 is: when electronic product does not have external charge power supply, utilizes battery J1, J2 to export the electricity consumption load supplying that supply power voltage is electronic product inside.When the output voltage of battery J1 is greater than the output voltage of battery J2, anti-back biased diode D1 conducting, anti-back biased diode D2 oppositely ends, due to the existence of anti-back biased diode D2, can ensure that the voltage of battery J1 can not pour in down a chimney as battery J2 charges, now, entirely provided by battery J1 with the supply power voltage needed for electric loading.When the output voltage of battery J1 reduces to time equal with the output voltage of battery J2, diode D1, D2 conducting, utilizes two pieces of batteries J1, J2 for electricity consumption load supplying.Otherwise when the output voltage of battery J2 is greater than the output voltage of battery J1, diode D1 oppositely ends, avoid the electric current exported by battery J2 to pour in down a chimney charging to battery J1, just ensure that two pieces of batteries J1, J2 all can export its due battery capacity thus.
When having external charging plant-grid connection on the charging inlet VBUS of electronic product, N-channel MOS pipe Q2 saturation conduction in first switching circuit, drag down the grid potential of P channel MOS tube Q1, make P channel MOS tube Q1 saturation conduction, be communicated with the charge circuit of battery J1, now, the charging current that charge power supply exports transfers to the positive pole of battery J1, for battery J1 charges via the source electrode of discharge and recharge interface VBAT, P channel MOS and drain electrode.
When also underfill is electric for battery J1, the partial pressure value formed after divider resistance R9, R8 dividing potential drop due to the cathode voltage VBAT_1 of battery J1 is less than the first reference voltage Vref _ 1, thus now, the anti-phase input terminal voltage of comparator U1 is greater than its in-phase input end voltage, comparator U1 output low level, the N-channel MOS pipe Q4 controlled in second switch circuit ends.Because N-channel MOS pipe Q4 ends, therefore the grid voltage of P channel MOS tube Q3 is pulled to equal with its source voltage by resistance R1, and thus P channel MOS tube Q3 ends, and battery J2 does not charge.During this period, the voltage magnitude due to the charge power supply of outside is greater than the cathode voltage of battery J1, and therefore diode D2 oppositely ends, and utilizes the electricity consumption load supplying that charge power supply is electronic product inside.
When battery J1 is full of electricity, the partial pressure value that the cathode voltage VBAT_1 of battery J1 is formed after divider resistance R9, R8 dividing potential drop is greater than the first reference voltage Vref _ 1, now, the anti-phase input terminal voltage of comparator U1 is less than its in-phase input end voltage, comparator U1 exports high level, and under the pull-up effect of pull-up resistor R5 and DC power supply VCC, be stabilized on the voltage magnitude of DC power supply VCC, control the N-channel MOS pipe Q4 saturation conduction in second switch circuit thus.After N-channel MOS pipe Q4 saturation conduction, drag down the grid potential of P channel MOS tube Q3, make P channel MOS tube Q3 proceed to saturation conduction state, be communicated with the charge circuit of battery J2, charge power supply is started as battery J2 charges.In the process that battery J2 charges, because the first switching circuit remains conducting state, therefore charge power supply can also continue as battery J1 and charges, until battery J1 is charged to saturated.
When the charge power supply of outside is from after charging inlet VBUS extracts, the N-channel MOS pipe Q2 in the first switching circuit proceeds to cut-off state immediately, and now P channel MOS tube Q1 ends, and cuts off the charge circuit of battery J1, utilizes battery J1, J2 for electricity consumption load supplying.Decline at the cathode voltage VBAT_1 of battery J1, and when the partial pressure value formed after divider resistance R9, R8 dividing potential drop is less than the first reference voltage Vref _ 1, comparator U1 output low level, controls second switch circuit shut-down, cuts off the charge circuit of battery J2.
In order to ensure the fail safe of battery J1, J2 charging process, the present embodiment preferably sets up charging management chip in described electronic product, as shown in Figure 3, connects described charging inlet VBUS, discharge and recharge interface VBAT respectively and uses electric loading.When charging management chip detect charging inlet VBUS has charge power supply to access time, current delivery charge power supply exported on the one hand, to discharge and recharge interface VBAT, is battery J1, J2 charging; On the other hand, charge power supply being transferred to by electric loading, is electricity consumption load supplying.When charging management chip detect charging inlet VBUS does not have charge power supply to access time, be communicated with by electric loading by described discharge and recharge interface VBAT, the cell voltage utilizing battery J1, J2 to export is electricity consumption load supplying.
Certainly, the switching circuit for the present embodiment also can adopt other switch elements except metal-oxide-semiconductor such as triode, controllable silicon to design; Also other circuit structure design except comparator U1 can be adopted to realize for described comparison circuit, the present embodiment is not limited in above citing.
Fig. 2 only lists the circuit connection structure of two pieces of batteries J1, J2, for the electronic product being built-in with more polylith battery, can copy in Fig. 2 and carry out multichannel expansion for the circuit design mode controlling battery J2 discharge and recharge, to realize the charge and discharge control to other each piece of battery, the present embodiment no longer launches explanation at this.
Certainly; above-mentioned explanation is not limitation of the present invention; the present invention is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (10)
1. based on a power circuit for many batteries, it is characterized in that: described battery is rechargeable battery, be provided with N block, N be greater than 1 positive integer; The N road supply power voltage exported by the positive pole of N block battery transfers to by electric loading via the anti-back biased diode in N road correspondingly; A switching circuit is connected in the charge circuit of each block battery, wherein, when the first switching circuit be connected in the charge circuit of first piece of battery has charge power supply to access on charging inlet, be communicated with the charge circuit of first piece of battery, utilize described charge power supply to be first piece of battery charging; Be connected to the action when i-th piece of battery is full of electricity of i-th in the charge circuit of the i-th+1 piece battery+1 switching circuit, be communicated with the charge circuit of the i-th+1 piece battery, utilize described charge power supply to be the i-th+1 piece battery charging, described i=1,2 ..., N-1.
2. the power circuit based on many batteries according to claim 1, it is characterized in that: in described power circuit, be provided with N-1 comparison circuit, connect one to one with other N-1 switching circuit except described first switching circuit respectively, when i-th comparison circuit detects that the cathode voltage of i-th piece of battery is greater than the i-th reference voltage after dividing potential drop, judge that i-th piece of battery is full of electricity, output switching signal controls the i-th+1 switching circuit action, is communicated with the charge circuit of the i-th+1 piece battery.
3. the power circuit based on many batteries according to claim 2, it is characterized in that: in the comparison circuit described in each, be provided with a comparator, the cathode voltage of described i-th piece of battery acts on the in-phase input end of i-th comparator via the partial pressure value formed after a resistance pressure-dividing network dividing potential drop, the i-th reference voltage that one DC power supply is formed after another electric resistance partial pressure networking dividing potential drop is acted on the inverting input of i-th comparator, the resistance of the divider resistance in resistance pressure-dividing network described in configuration two-way, make i-th piece of battery only when being full of electricity, the partial pressure value of its cathode voltage is greater than the i-th described reference voltage, described switching signal is exported to the i-th+1 described switching circuit by the output of i-th comparator.
4. the power circuit based on many batteries according to claim 3, is characterized in that: described DC power supply connects the power supply terminal of each comparator, for comparator is powered; The output of each comparator is each via the DC power supply described in pull-up resistor connection.
5. the power circuit based on many batteries according to claim 4, is characterized in that: described DC power supply is generated by voltage stabilizing circuit conversion by the supply power voltage transferring to described electric loading.
6. the power circuit based on many batteries according to any one of claim 2 to 5, it is characterized in that: the anode of the anti-back biased diode in described N road is connected one to one with the positive pole of N block battery, the negative electrode of the anti-back biased diode in N road is connected to same road discharge and recharge interface; Switching circuit at the two ends of the anti-back biased diode in each road respectively described in one in parallel.
7. the power circuit based on many batteries according to claim 6, it is characterized in that: in the switching circuit described in each, be provided with a P channel MOS tube and a N-channel MOS pipe, the drain electrode of described P channel MOS tube connects the positive pole of battery, discharge and recharge interface described in source electrode connects, grid connects the drain electrode of N-channel MOS pipe, and the discharge and recharge interface described in being connected by current-limiting resistance; The source ground of described N-channel MOS pipe, the switching signal that the charge power supply described in grid receives or described comparison circuit export.
8. the power circuit based on many batteries according to claim 6, it is characterized in that: in described power circuit, be also provided with a charging management chip, connect described charging inlet, discharge and recharge interface and by electric loading respectively, described charging management chip detect described charging inlet has charge power supply to access time, charge power supply is transferred to respectively described discharge and recharge interface and by electric loading, for described battery charges, and it is electricity consumption load supplying; When described charging management chip detect described charging inlet accesses without charge power supply time, battery is transferred to described use electric loading by the supply power voltage that described discharge and recharge interface exports, utilizes battery for electricity consumption load supplying.
9. the power circuit based on many batteries according to claim 6, is characterized in that: described discharge and recharge interface connects described charging inlet respectively and uses electric loading.
10. an electronic product, is provided with power circuit and by electric loading, it is characterized in that: described power circuit is as claimed in any one of claims 1-9 wherein based on the power circuit of many batteries.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492934A (en) * | 2017-09-19 | 2017-12-19 | 上海丹焱信息科技有限公司 | A kind of electronic installation with power supply circuit |
| CN108879618A (en) * | 2018-07-20 | 2018-11-23 | 坎德拉（深圳）科技创新有限公司 | A kind of battery protecting circuit and more level battery protecting circuits |
| CN109193873A (en) * | 2018-11-09 | 2019-01-11 | 广东电网有限责任公司 | Spare gridding battery pack and its method of controlling security after a kind of |
| CN110492619A (en) * | 2019-09-12 | 2019-11-22 | 浙江齐享科技有限公司 | A kind of combined type energy-accumulating power station |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123359A (en) * | 2006-08-10 | 2008-02-13 | 东华能源科技股份有限公司 | A charging circuit without loss balance charging multiple serial batteries |
| CN101841176A (en) * | 2009-03-19 | 2010-09-22 | 罗伯特·博世有限公司 | Charging method and charging system |
| CN201829988U (en) * | 2010-10-29 | 2011-05-11 | 刘隽帆 | Expander for lithium battery charging |
| CN102113191A (en) * | 2008-05-28 | 2011-06-29 | 美国信赖股份有限公司 | DC power control for maximizing battery charging time |
| CN202474990U (en) * | 2011-11-23 | 2012-10-03 | 惠州市亿能电子有限公司 | Non-circulating-current battery pack device |
| CN204481525U (en) * | 2015-04-02 | 2015-07-15 | 青岛歌尔声学科技有限公司 | Based on many batteries power circuit and there is the electronic product of described power circuit |
-
2015
- 2015-04-02 CN CN201510153913.1A patent/CN104716715A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123359A (en) * | 2006-08-10 | 2008-02-13 | 东华能源科技股份有限公司 | A charging circuit without loss balance charging multiple serial batteries |
| CN102113191A (en) * | 2008-05-28 | 2011-06-29 | 美国信赖股份有限公司 | DC power control for maximizing battery charging time |
| CN101841176A (en) * | 2009-03-19 | 2010-09-22 | 罗伯特·博世有限公司 | Charging method and charging system |
| CN201829988U (en) * | 2010-10-29 | 2011-05-11 | 刘隽帆 | Expander for lithium battery charging |
| CN202474990U (en) * | 2011-11-23 | 2012-10-03 | 惠州市亿能电子有限公司 | Non-circulating-current battery pack device |
| CN204481525U (en) * | 2015-04-02 | 2015-07-15 | 青岛歌尔声学科技有限公司 | Based on many batteries power circuit and there is the electronic product of described power circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492934A (en) * | 2017-09-19 | 2017-12-19 | 上海丹焱信息科技有限公司 | A kind of electronic installation with power supply circuit |
| CN107492934B (en) * | 2017-09-19 | 2024-01-30 | 上海丹焱信息科技有限公司 | Electronic device with power supply circuit |
| CN108879618A (en) * | 2018-07-20 | 2018-11-23 | 坎德拉（深圳）科技创新有限公司 | A kind of battery protecting circuit and more level battery protecting circuits |
| CN109193873A (en) * | 2018-11-09 | 2019-01-11 | 广东电网有限责任公司 | Spare gridding battery pack and its method of controlling security after a kind of |
| CN110492619A (en) * | 2019-09-12 | 2019-11-22 | 浙江齐享科技有限公司 | A kind of combined type energy-accumulating power station |
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