CN206894276U - A kind of battery formation circuit - Google Patents

Abstract

The utility model discloses a kind of battery formation circuit, including power supply module, voltage control module and current control module.The power supply module includes supply lines, switch element, driving chip and main control chip.Supply lines includes input side and outlet side.Input side receives input voltage and input current.Outlet side exports charging voltage and charging current.Switch element includes input pole, output stage and control pole.Input pole electrically connects with input side, and output stage electrically connects with outlet side, and control pole electrically connects with driving chip.Main control chip produces control signal and passes to driving chip, and driving chip sends drive signal to switch element according to control signal, is turned on or off with control input pole with output stage.Voltage control module and current control module electrically connect with power supply module.Charging voltage is maintained a scheduled voltage by voltage control module.Charging current is maintained a predetermined current value by current control module.The beneficial effects of the utility model are：Cost is relatively low.

Description

A kind of battery formation circuit

【Technical field】

It the utility model is related to cell art, more particularly to a kind of battery formation circuit.

【Background technology】

Present battery production needs that by chemical conversion and a series of discharge and recharge steps such as partial volume finished product electricity could be formed later Pond.Battery formation refers to a kind of process to secondary cell (rechargeable battery) discharge and recharge.The chemical conversion of battery refers to new production Battery carry out primary charging, the meaning that " chemical conversion " " is transformed ", using chemistry with electrochemical reaction pole plate is changed into tool There is the process of the positive and negative pole plate of electrochemical properties.This process is to influence the important step of battery life.Normally it is divided into constant current to fill Electricity and constant-voltage charge two benches, should first adopt low current trickle charge makes battery terminal voltage constant current is charged to again to final discharging voltage Battery terminal voltage reaches constant-voltage charge voltage, then changes constant-voltage charge untill being full of.Present Battery formation is needed from other Company buys Special Equipment, and cost consumption is big；And equipment once go wrong need contact producer, delay production；It is simultaneously autonomous It is handling not strong, fail fully according to battery behavior to design, commissioning device, it is impossible to parameter is changed in real time, if problematic needs Producer is seeked advice from, is taken time and effort.

In view of above drawback, is necessary to provide a kind of battery formation circuit in fact to overcome disadvantages described above.

【Utility model content】

The purpose of this utility model is to provide a kind of battery formation circuit, and cost is relatively low and can adjust ginseng according to battery behavior Number is time saving and energy saving.

To achieve these goals, the utility model provides a kind of battery formation circuit, including the control of power supply module, voltage Module and current control module.The power supply module includes a pair of supply lines, a switch element, a driving chip and a master Control chip.This includes input side and outlet side to supply lines.The input side includes the first positive pole and the first negative pole, defeated for receiving Enter voltage and input current.The outlet side includes the second positive pole and the second negative pole, for exporting charging voltage and charging current.Should Switch element includes input pole, output stage and control pole.The input pole electrically connects with first positive pole, the output stage with this first Negative pole electrically connects, and the control pole electrically connects with the driving chip.The main control chip electrically connects with the driving chip.The main control chip Produce a control signal and simultaneously pass to the driving chip, the driving chip according to the control signal send a drive signal to The switch element, to control the input pole and the output stage to be turned on or off.The voltage control module and the current control module Electrically connected with the power supply module.The voltage control module is used to the charging voltage maintaining a scheduled voltage, should Current control module is used to the charging current maintaining a predetermined current value.

In a preferred embodiment, the switch element is N-type metal oxide semiconductor transistor.The input is extremely Drain electrode, the output extremely source electrode, the control extremely grid.

In a preferred embodiment, the main control chip includes controlling switch.The driving chip inputs including high potential Pin, high potential output pin, high potential connection pin and high potential boosting pin.The high potential input pin draws with the control Pin electrically connects, and the high potential output pin electrically connects with the control pole, and high potential connection pin electrically connects with the output stage, should High potential boosting pin is electrically connected by first electric capacity with the output stage.

In a preferred embodiment, the high potential output pin is electrically connected by a first resistor with the control pole Connect, the control pole is electrically connected by a second resistance with the output stage.

In a preferred embodiment, on the supply lines between output stage and second positive pole of the switch element With a voltage acquisition point.The main control chip also includes compensation pin and reference voltage pin.The voltage control module includes First photo-coupler, the first amplifier, the first diode, the first divider resistance and the second divider resistance.First photo-coupler Including first end, the second end, the 3rd end and the 4th end.The first end electrically connects a fixed voltage source.3rd end is grounded.Should 4th end electrically connects with the compensation pin and the reference voltage pin.First amplifier includes the first in-phase input end, first Inverting input and the first output end.First in-phase input end is used to receive a first stable reference voltage.This first Inverting input is electrically connected by first divider resistance with the voltage acquisition point, and with being grounded by second divider resistance. First inverting input also electrically connects with first output end.First output end passes through first diode and first light Second end electrical connection of coupler.The positive pole of first diode electrically connects with second end, the negative pole of first diode Electrically connected with first output end.

In a preferred embodiment, the current control module includes current detecting chip, precision resistance, fixed electricity Resistance, the second amplifier, the second diode, the 3rd divider resistance and the 4th divider resistance.The current detecting chip includes positive input Pin, negative input pin, the first pin, second pin and voltage output pin.The both ends of the precision resistance are just defeated with this respectively Enter pin and negative input pin electrical connection.The positive input pin electrically connects with second positive pole.The negative input pin and the electricity Press collection point electrical connection.First pin is electrically connected by the fixed resistance with the second pin.Second amplifier includes the Two in-phase input ends, the second inverting input and the second output end.Second in-phase input end is used to receiving one stable the Two reference voltages.Second inverting input is electrically connected by the 3rd divider resistance with the voltage output pin, and by this Four divider resistances are grounded.Second output end is electrically connected by second diode with second end of first photo-coupler. The positive pole of second diode electrically connects with second end, and the negative pole of second diode electrically connects with second output end.

In a preferred embodiment, the battery formation circuit also includes benchmark comparison module.The benchmark comparison module Including the first benchmark comparison circuit and the second benchmark comparison circuit.The first benchmark comparison circuit is used to carry to first amplifier For first reference voltage, the second benchmark comparison circuit is used to provide second reference voltage to second amplifier.

In a preferred embodiment, the first benchmark comparison circuit includes the first adjustable reference voltage source and first point Volt circuit.The first adjustable reference voltage source includes the first positive terminal, the first negative pole end and the first reference edge.First positive terminal Ground connection, first negative pole end electrically connect with first in-phase input end of first amplifier.First reference edge by this One bleeder circuit electrically connects with the fixed voltage source.The second benchmark comparison circuit includes the second adjustable reference voltage source and second Bleeder circuit.The second adjustable reference voltage source includes the second positive pole, the second negative pole and the second reference edge.Second positive pole connects Ground, second negative pole electrically connect with second in-phase input end of second amplifier.Second reference edge passes through this second point Volt circuit electrically connects with the fixed voltage source.

In a preferred embodiment, the battery formation circuit also includes limiting voltage protection module.The limiting voltage Module includes the second photoelectrical coupler and the 3rd benchmark comparison circuit.3rd benchmark comparison circuit and first benchmark are more electric The circuit structure on road is identical.Second photoelectrical coupler includes the 5th end, the 6th end, the 7th end and the 8th end.5th end with The voltage acquisition point electrically connects.6th end electrically connects with the 3rd benchmark comparison circuit.Draw with the current detecting at 7th end Pin electrically connects.8th end electrically connects with the reference voltage pin.

In a preferred embodiment, the battery formation circuit also includes carrying current protection module.The carrying current Protection module includes transformer and the 3rd diode.The transformer includes primary side and primary side.The primary side includes the 9th end And the tenth end, the primary side include the tenth one end and the 12nd end.9th end electrically connects with first positive pole.Tenth end with The input pole electrical connection of the switch element.Tenth one end is electrically connected by voltage regulation resistance with the 12nd end.12nd End ground connection.Tenth one end is also electrically connected by the 3rd diode with the current detecting pin.The positive pole of 3rd diode Electrically connected with the tenth one end, the negative pole of the 3rd diode electrically connects with the current detecting pin.

Compared with prior art, a kind of beneficial effect of battery formation circuit provided by the utility model is：Using normal Electronic component can carry out Battery formation, and cost is relatively low and can be time saving and energy saving according to battery behavior adjusting parameter.

【Brief description of the drawings】

Fig. 1 is the functional block diagram of battery formation circuit of the present utility model.

Fig. 2 is the circuit diagram of the power supply module of the battery formation circuit shown in Fig. 1.

Fig. 3 is the circuit diagram of the voltage control module of the battery formation circuit shown in Fig. 1.

Fig. 4 is the circuit diagram of the current control module of the battery formation circuit shown in Fig. 1.

Fig. 5 is the circuit diagram of the benchmark comparison module of the battery formation circuit shown in Fig. 1.

Fig. 6 is the circuit diagram of the limiting voltage protection module of the battery formation circuit shown in Fig. 1.

Fig. 7 is the circuit diagram of the carrying current protection module of the battery formation circuit shown in Fig. 1.

【Embodiment】

In order that the purpose of this utility model, technical scheme and advantageous effects become apparent from understanding, below in conjunction with attached Figure and embodiment, the utility model is further elaborated.It should be appreciated that described in this specification Embodiment is not intended to limit the utility model just for the sake of explaining the utility model.

As shown in figure 1, a kind of battery formation circuit 100 provided by the utility model, including the control of power supply module 10, voltage Module 20, current control module 30, benchmark comparison module 40, limiting voltage protection module 50 and carrying current protection module 60.

As shown in Fig. 2 the power supply module 10 includes supply lines 110, main control chip Z1, driving chip Z2, switch element Q. The supply lines 110 includes input side and outlet side.The input side includes the first positive pole P1 and the first negative pole P4, is inputted for receiving Voltage U1 and input current I1.The outlet side includes the second positive pole P2 and the second negative pole P3, for exporting charging voltage U2 and filling Electric current I2.In the present embodiment, U1>U2, I1<I2, U1=12V, I1=2A, U2=4.2V, I2=5A.

Switch element Q includes input pole D, output stage S and control pole G.Switch element Q input pole D with this first Positive pole P1 is electrically connected, and output stage S electrically connects with second positive pole P2, and control pole G electrically connects with driving chip Z2.This is defeated Going out has a voltage acquisition point B1+ between pole S and second positive pole P2.In the present embodiment, switch element Q is N-type metal Oxide semiconductor (N Metal Oxide Semiconductor, NMOS) transistor, input pole D are drain electrode, the output stage S is source electrode, control pole G is grid.

Main control chip Z1 includes controlling switch GATE, compensation pin COMP, reference voltage pin VREF, Voltage Feedback and drawn Pin VFB, crystal oscillator pin OSC and current detecting pin ISENSE.Controlling switch GATE electrically connects with driving chip Z2.The benefit Repay pin COMP and reference voltage pin VREF electrically connects with the voltage control module 20.The Voltage Feedback pin VFB and Crystal oscillator pin OSC is grounded.The current detecting pin ISENSE protects with the limiting voltage protection module 50 and the carrying current Module 60 electrically connects.In the present embodiment, main control chip U1 model UCC28C40D.

Driving chip Z2 include high potential input pin HI, high potential connection pin HS, high potential output pin HO and High potential boosting pin HB.The high potential input pin HI electrically connects with controlling switch GATE.High potential connection pin HS Electrically connected with output stage S.High potential boosting pin HB is electrically connected by the first electric capacity C1 with output stage S.The high potential Output pin HO is electrically connected by first resistor R2 with control pole G, and control pole G passes through second resistance R3 and output stage S Electrical connection.In the present embodiment, driving chip Z2 model UCC27200DDAR.

The operation principle of the power supply module 10 is：One control signal is produced by main control chip Z1 and passes to the driving Chip Z2, driving chip Z2 send a drive signal according to the control signal and give switch element Q, to control the input pole D is turned on or off with output stage S's, so as to which electric energy is delivered into the outlet side by the input side of the supply lines 101.

As shown in figure 3, the voltage control module 20 be used for by the charging voltage maintain a scheduled voltage (such as 4.2V), it includes the first photo-coupler OP1, the first amplifier Z4A, the first diode D1, the first divider resistance Ra and second point Piezoresistance Rb.

First photo-coupler OP1 includes first end 1, the second end 2, the 3rd end 3 and the 4th end 4.The first end 1 is with fixing Voltage source V0 is electrically connected, and second end 2 is electrically connected with first amplifier Z4A, and the 3rd end 3 is grounded, the 4th end 4 and the benefit Repay pin COMP and reference voltage pin VREF electrical connections.In the present embodiment, first photo-coupler OP1 model PS2701-1。

First amplifier Z4A includes the first output end a1, the first in-phase input end a2 and the first inverting input a3.Should First output end a1 is electrically connected by the first diode D1 with first photo-coupler OP1 second end 2.Specifically, should First diode D1 positive pole electrically connects with second end 2, and first diode D1 negative pole and first output end a1 are electrically connected Connect.First in-phase input end a2 is used to receive stable first reference voltage (such as 2.5V).First anti-phase input End a3 is electrically connected by the first divider resistance Ra with voltage acquisition point B1+, and with being grounded by second divider resistance Rb. First inverting input a3 also electrically connects with first output end a1.In the present embodiment, first amplifier Z4A model For LM2904DR.

The operation principle of the voltage control module 20 is：Because switch element Q is turned on, so the master of the charging circuit 10 The voltage of voltage acquisition point B1+ on loop gradually rises.Voltage acquisition point B1+ voltage can be transferred to first amplification On device Z4A, and after carrying out partial pressure by the first divider resistance Ra and second divider resistance Rb, with first in-phase input end First reference voltage (such as 2.5V) is compared, relatively after result by first diode D1 after, by this first Photo-coupler OP1 feeds back to main control chip Z1, and main control chip Z1 can control output duty cycle to adjust switch Q conducting Pulse width, fed back with this to limit voltage acquisition point B1+ voltage, allow it be always held at the scheduled voltage (such as It is 4.0V) constant.

As shown in figure 4, the current control module 30 is used to the charging current maintaining a predetermined current value (such as 5A), It includes current detecting chip Z3, precision resistance R101 (see Fig. 1), fixed resistance R102, the second amplifier Z4B, the two or two pole Pipe D2, the 3rd divider resistance Rc and the 4th divider resistance Rd.

Current detecting chip Z3 includes positive input pin+IN, negative input pin-IN, the first pin R-G, second pin R-G, positive electricity source pin+VS, negative electricity source pin-VS, low reference pin REF and voltage output pin V-OUT.Precision resistance R101 Both ends electrically connected respectively with positive input pin+IN and the negative input pin-IN.The positive input pin+IN also with this second Positive pole P2 is electrically connected.Negative input pin-IN electrically connects with voltage acquisition point B1+.Positive electricity source pin+VS and fixation electricity Pressure side V0 is electrically connected, and negative electricity source pin-VS and low reference pin REF ground connection, the first pin R-G pass through the fixed resistance R102 electrically connects with second pin R-G.Voltage output pin V-OUT exports a detection signal V-isence.In this reality Apply in example, fixed resistance R102 includes two resistance being serially connected, current detecting chip Z3 model AD8226.

Second amplifier Z4B includes the second output end b1, the second in-phase input end b2 and the second inverting input b3.Should Second output end b1 is electrically connected by the second diode D2 with first photo-coupler OP1 second end 2.The second same phase Input b2 is used to receive stable second reference voltage (such as 2.5V).The second inverting input b3 passes through the 3rd point Piezoresistance Rc electrically connects with current detecting chip Z3 voltage output pin V-OUT, to receive detection signal V- isence；Also it is grounded simultaneously by the 4th divider resistance Rd.The second inverting input b3 electrically connects with second output end b1. In the present embodiment, second amplifier Z4B model LM2904DR.

The operation principle of the current control module 30 is：When electric current flows through precision resistance R101, according to voltage=electricity Stream × resistance, precision resistance R101 both ends can produce a corresponding voltage, and the numerical value of this voltage is smaller, and it will lead to Cross and gathered and amplified by a certain percentage according to fixed resistance R102 resistance by current detecting chip Z3, pass through the voltage output Pin V-OUT is transferred to second amplifier Z4B, by the 3rd divider resistance Rc and the 4th divider resistance Rd in transmitting procedure After carrying out partial pressure, compared with second in-phase input end b2 second reference voltage, relatively after result by this Two diode D2, main control chip Z1 is fed back to via first photo-coupler OP1, main control chip Z1 can control output duty Than adjusting switch element Q conduction pulses width, fed back with this and be always held at this to limit the electric current on the major loop Predetermined current value (such as 5A) is constant.

As shown in figure 5, the benchmark comparison module 40 includes the first benchmark comparison circuit 41 and the second benchmark comparison circuit 42.

The first benchmark comparison circuit 41 includes the first adjustable reference voltage source TL1 and the first bleeder circuit 201.This first Adjustable reference voltage source TL1 includes the first positive terminal d1, the first negative pole end d2 and the first reference edge d3.First positive terminal d1 connects Ground, the first negative pole end d2 electrically connect with first amplifier Z4A first in-phase input end a2, for giving first amplification Device Z4A provides first reference voltage (such as 2.5V).The first reference edge d3 is fixed by first bleeder circuit 201 with this Voltage source V0 is electrically connected.First bleeder circuit 201 includes the 5th divider resistance Re and the 6th divider resistance Rf.First reference End d3 is electrically connected by the 5th divider resistance Re with fixed voltage source V0, and is grounded by the 6th divider resistance Rf.

The second benchmark comparison circuit 42 includes the second adjustable reference voltage source TL2 and the second bleeder circuit 202.This second Adjustable reference voltage source TL2 includes the second positive terminal e1, the second negative pole end e2 and the second reference edge e3.Second positive terminal e1 connects Ground, the second negative pole end e2 electrically connect with second amplifier Z4B second in-phase input end b2, for giving second amplification Device Z4B provides second reference voltage (such as 2.5V).The second reference edge e3 is fixed by second bleeder circuit 202 with this Voltage source V0 is electrically connected.Second bleeder circuit 202 includes the 7th divider resistance Rh and the 8th divider resistance Ri.Second reference End e3 is electrically connected by the 7th divider resistance Rh with fixed voltage source V0, and is grounded by the 8th divider resistance Ri.

The operation principle of the benchmark comparison module 40 is：Using the first adjustable reference voltage source TL1 and this is second adjustable Reference voltage source TL2 characteristic, by the first negative pole end d2 and second negative pole end e2 output voltage stabilization in a predetermined electricity Pressure value (such as 2.5V) keeps constant, and the scheduled voltage can be as the first amplifier Z4A and second amplifier Z4B comparison Reference voltage.In the present embodiment, the first adjustable reference voltage source TL1 and the second adjustable reference voltage source TL2 model It is AZ431.

As shown in fig. 6, the limiting voltage protection module 50 includes the second photo-coupler OP2 and the 3rd benchmark comparison circuit 51。

Second photo-coupler OP2 includes the 5th end 5, the 6th end 6, the 7th end 7 and the 8th end 8.5th end 5 and the electricity Press collection point B1+ electrical connections.6th end 6 electrically connects with the 3rd benchmark comparison circuit 51, for receiving one stable the Three reference voltages (such as 2.5V).7th end 7 electrically connects with current detecting pin ISENSE.8th end 8 and the reference Voltage pin VREF is electrically connected.In the present embodiment, second photo-coupler OP2 model PS2701-1.

3rd benchmark comparison circuit 52 is identical with the circuit structure of the first benchmark comparison circuit 41, and it includes the 3rd can Adjust reference voltage source TL3 and the 3rd bleeder circuit 203.3rd adjustable reference voltage source TL3 includes the 3rd positive terminal f1, the 3rd Negative pole end f2 and the 3rd reference edge f3.3rd positive terminal f1 is grounded, and the 3rd negative pole end f2 electrically connects with the 6th end 6, is used The 3rd reference voltage (such as 2.5V) is provided in giving second photo-coupler OP2.3rd reference edge f3 passes through the 3rd point Volt circuit 203 electrically connects with the 6th end 6.3rd bleeder circuit 203 includes the 9th divider resistance Rk and the tenth divider resistance Rn.3rd reference edge f3 is electrically connected by the 9th divider resistance Rk with the 6th end 6, and passes through the tenth divider resistance Rn Ground connection.In the present embodiment, the 3rd adjustable reference voltage source TL3 model AZ431AN.

The limiting voltage protection module 50 is the second class protection measure of voltage, and its operation principle is：According to the voltage acquisition Point B1+ and the reference voltage pin VREF signal produce an analog control signal, and analog signal is examined by the electric current Survey pin ISENSE and be transferred to main control chip Z1, when main control chip Z1 reaches voltage threshold threshold value (such as a 4.5V) Switch Q is cut off, protection output voltage is no more than the voltage threshold threshold value, avoids causing the rechargeable battery because overcharging Damage.

As shown in fig. 7, the carrying current protection module 60 includes transformer T and the 3rd diode D3.Transformer T includes Primary side and primary side.The primary side includes the 9th end 9 and the tenth end 10, and the primary side includes the tenth one end 11 and the 12nd end 12.9th end 9 electrically connects with first positive pole P1.Tenth end 10 electrically connects with switch element Q input pole D.Should Tenth one end 11 is electrically connected by voltage regulation resistance R103 with the 12nd end 12.12nd end 12 is grounded.Tenth one end 11 Also electrically connected by the 3rd diode D3 with current detecting pin ISENSE.Specifically, the 3rd diode D3 positive pole Electrically connected with the tenth one end 11, the 3rd diode D3 negative pole electrically connects with current detecting pin ISENSE.

Second class protection measure of the carrying current protection module 60 as electric current, its operation principle are：Supervised according to transformer T The change of the input current is surveyed, and an analog control signal is produced according to the input current, and the analog control signal is led to Cross current detecting pin ISENSE and be transferred to main control chip Z1, when main control chip Z1 reaches a threshold threshold value Q is cut off when (such as 5.5A), protection output current is avoided because super-high-current or short circuit cause this not over the threshold threshold value Rechargeable battery damages.

Further, current detecting pin ISENSE is also grounded by 3rd resistor R1 and the second electric capacity C2, the compensation Pin COMP is also electrically connected by the 4th diode D4 with second electric capacity C2 first end, and reference voltage pin VREF leads to The first end that the 5th diode D5 is crossed with second electric capacity C2 electrically connects, second electric capacity C2 the second end ground connection so that when Electric moment on one, the 4th diode D4 and the 5th diode D5 are respectively to compensation pin COMP and the reference voltage pin VREF discharges simultaneously, to be charged to second electric capacity C2, so as to slowly be started to the battery formation circuit 100, with protection Output.Specifically, the 4th diode D4 positive pole electrically connects with compensation pin COMP, negative pole should with second electric capacity C2's First end electrically connects；5th diode D5 positive pole electrically connects with the second electric capacity C2 first end, negative pole and the reference electricity Press pin VREF electrical connections.

The crystal oscillator pin OSC is electrically connected by a 4th resistance R4 with the 5th diode D5 negative pole, and passes through one Individual 3rd electric capacity C3 ground connection, the 4th resistance R4 and the 3rd electric capacity C3 forms resonance circuit, to produce the triangle of fixed frequency Ripple is transferred to main control chip Z1 crystal oscillator pin OSC.The crystal oscillator pin OSC is by one by the electricity of the 5th resistance R5 and the 4th The filter circuit for holding C4 compositions electrically connects with current detecting pin ISENSE.The current detecting pin ISENSE passes through a filter Ripple electric capacity C103 is grounded.Current detecting pin ISENSE also passes through a 6th resistance R6's and second photo-coupler OP2 3rd diode D3 of the 7th end 7 and the carrying current protection module 60 negative pole electrical connection.6th resistance R6 plays limit Stream acts on.

Further, the power supply module 10 also includes inductance L, the 6th diode D6, the first electrochemical capacitor C104, the 5th electricity Hold C5, the 7th resistance R7, the 8th resistance R8, the 6th electric capacity C6, the second electrochemical capacitor C105, the 3rd electrochemical capacitor C106, the 7th Electric capacity C7 and the 8th electric capacity C8.

Inductance L one end electrically connects with switch element Q output stage S, and the other end is electrically connected with precision resistance R101 Connect.Voltage acquisition point B1+ is located between inductance L and precision resistance R101.6th diode D6 plus earth, bear Pole is connected electrically between output stage S and the switch element Q output stage S.First electrochemical capacitor C104 positive pole electrical connection Between the first positive pole P1 and transformer T the 9th end 9, negative pole ground connection.5th electric capacity C5 and the first electrolysis electricity It is in parallel to hold C104.Second electrochemical capacitor C105 positive pole electrically connects with voltage acquisition point B1+, negative pole ground connection.7th electricity It is in parallel with second electrochemical capacitor C105 to hinder R7, the 8th resistance R8 and the 7th electric capacity C7.3rd electrochemical capacitor C106 One end be connected electrically between precision resistance R101 and second positive pole P2, the other end ground connection.7th electric capacity C7 and this Eight electric capacity C8 are in parallel with the 3rd electrochemical capacitor C106.

Further, first photo-coupler OP1 first end 1 passes through the 9th resistance R9 and fixed voltage source V0 electricity Connection, the 4th end 4 is electrically connected by the tenth resistance R10 with reference voltage pin VREF.3rd end 3 is also by by the 9th The wave filter of electric capacity C9 and the 11st resistance R11 compositions electrically connects with compensation pin COMP.First in-phase input end a2 leads to The 12nd resistance R12 is crossed to electrically connect with the first benchmark comparison circuit 41.The first divider resistance Ra and first anti-phase input A the 13rd resistance R13 is also electrically connected between the a3 of end, between the first inverting input a3 and first output end a1 also A wave filter being composed in series by the 14th resistance R14 and the tenth electric capacity C10 is electrically connected with, first output end a1 also passes through 15th resistance R15 electrically connects with first diode D1 negative pole.

Further, positive electricity source pin+VS is electrically connected by the 16th resistance R16 with fixed voltage end V0, and this Two output end b1 are also electrically connected by the 17th resistance R17 with second diode D2 negative pole, second in-phase input end b1 Electrically connected by the 18th resistance R18 with second reference circuit 42.The second inverting input b3 passes through one the 19th electricity Resistance R19 electrically connects with the first divider resistance Rc and second divider resistance Rd.Second inverting input b3 passes through the 11st Electric capacity C11 and the 20th resistance R20 electrically connects with second output end b1.

Further, the first benchmark comparison circuit 41 also includes the first current-limiting resistance Rg and the first filter capacitor C101. 5th divider resistance Re is electrically connected by the first current-limiting resistance Rg with fixed voltage source V0.First reference edge d3 passes through First filter capacitor C101 is grounded.

Further, the second benchmark comparison circuit 42 also includes the second current-limiting resistance Rj and the second filter capacitor C102. 7th divider resistance Rh is electrically connected by the second current-limiting resistance Rj with fixed voltage source V0.Second reference edge e3 passes through Second filter capacitor C102 is grounded.

Further, second photo-coupler OP2 the 5th end 5 passes through a 21st resistance R21 and the voltage Collection point B1+ is electrically connected.8th end 8 is electrically connected by the 22nd resistance R22 with reference voltage pin VREF.

Further, the 3rd benchmark comparison circuit 51 also includes the 3rd current-limiting resistance Rm and the 3rd filter capacitor C103. 9th divider resistance Rk is electrically connected by the 3rd current-limiting resistance Rm with the 6th end 6.3rd reference edge f3 by this Three filter capacitor C103 are grounded.

Further, the 3rd diode D3 negative pole also passes through the 23rd resistance R23 parallel with one another and the 12nd Electric capacity C12 is grounded.

Compared with prior art, a kind of battery formation circuit provided by the utility model, conventional electronics member device is used Part can carry out Battery formation, and cost is relatively low, and parameter adjustment can be carried out according to battery behavior, convenient and swift, time saving and energy saving.

The utility model is not restricted to described in specification and embodiment, therefore for the personnel of familiar field For additional advantage and modification is easily achieved, therefore in the universal limited without departing substantially from claim and equivalency range Spirit and scope in the case of, the utility model is not limited to specific details, representational equipment and shown here as with retouching The examples shown stated.

Claims (10)

1. a kind of battery formation circuit, including power supply module, it is characterised in that the power supply module include a pair of supply lines, one Switch element, a driving chip and a main control chip, this includes input side and outlet side to supply lines, and the input side includes First positive pole and the first negative pole, for receiving input voltage and input current；The outlet side includes the second positive pole and the second negative pole, For exporting charging voltage and charging current；The switch element includes input pole, output stage and control pole, and the switch element is somebody's turn to do Input pole electrically connects with first positive pole, and the output stage electrically connects with first negative pole, and the control pole is electrically connected with the driving chip Connect；The main control chip electrically connects with the driving chip, and the main control chip produces a control signal and passes to the driving chip, The driving chip sends a drive signal according to the control signal and gives the switch element, to control the input pole and the output stage It is turned on or off；The battery formation circuit also includes voltage control module and the current control mould electrically connected with the power supply module Block, the voltage control module are used to the charging voltage maintaining a scheduled voltage, and the current control module is used for should Charging current maintains a predetermined current value.

2. battery formation circuit as claimed in claim 1, it is characterised in that：The switch element is that N-type metal oxide is partly led Body transistor, the input extremely drain, the output extremely source electrode, the control extremely grid.

3. battery formation circuit as claimed in claim 2, it is characterised in that：The main control chip includes controlling switch, the driving Chip includes high potential input pin, high potential output pin, high potential connection pin and high potential boosting pin, the high potential Input pin electrically connects with the controlling switch, and the high potential output pin electrically connects with the control pole, high potential connection pin Electrically connected with the output stage, high potential boosting pin is electrically connected by first electric capacity with the output stage.

4. battery formation circuit as claimed in claim 3, it is characterised in that：The high potential output pin passes through one first electricity Resistance is electrically connected with the control pole, and the control pole is electrically connected by a second resistance with the output stage.

5. battery formation circuit as claimed in claim 1, it is characterised in that：In the output of the switch element on the supply lines There is a voltage acquisition point between pole and second positive pole, the main control chip also includes compensation pin and reference voltage pin, The voltage control module includes the first photo-coupler, the first amplifier, the first diode, the first divider resistance and the second partial pressure electricity Resistance, first photo-coupler include first end, the second end, the 3rd end and the 4th end, and the first end electrically connects a fixed voltage Source, the 3rd end ground connection, the 4th end electrically connects with the compensation pin and the reference voltage pin；First amplifier includes the One in-phase input end, the first inverting input and the first output end, first in-phase input end are used to receive a stable base Quasi- voltage；First inverting input is electrically connected by first divider resistance with the voltage acquisition point, and with by this second Divider resistance is grounded；First inverting input also electrically connects with first output end, and first output end passes through the one or two Pole pipe electrically connects with second end of first photo-coupler, and the positive pole of first diode electrically connects with second end, and this The negative pole of one diode electrically connects with first output end.

6. battery formation circuit as claimed in claim 5, it is characterised in that：The current control module includes current detecting core Piece, precision resistance, fixed resistance, the second amplifier, the second diode, the 3rd divider resistance and the 4th divider resistance, the electric current Detection chip includes positive input pin, negative input pin, the first pin, second pin and voltage output pin, the precision resistance Both ends electrically connected respectively with the positive input pin and the negative input pin, the positive input pin electrically connects with second positive pole, The negative input pin is electrically connected with the voltage acquisition point, and first pin is electrically connected by the fixed resistance with the second pin, Second amplifier includes the second in-phase input end, the second inverting input and the second output end, and second in-phase input end is used In one stable reference voltage of reception；Second inverting input is electrically connected by the 3rd divider resistance and the voltage output pin Connect, and be grounded by the 4th divider resistance；Second output end passes through this of second diode and first photo-coupler Second end electrically connects, and the positive pole of second diode electrically connects with second end, the negative pole of second diode and this second Output end electrically connects.

7. battery formation circuit as claimed in claim 6, it is characterised in that：The battery formation circuit also compares mould including benchmark Block, the benchmark comparison module include the first benchmark comparison circuit and the second benchmark comparison circuit, and the first benchmark comparison circuit is used In giving first amplifier to provide first reference voltage, the second benchmark comparison circuit, which is used to provide to second amplifier, to be somebody's turn to do Second reference voltage.

8. battery formation circuit as claimed in claim 7, it is characterised in that：It is adjustable that the first benchmark comparison circuit includes first Reference voltage source and the first bleeder circuit；The first adjustable reference voltage source includes the first positive terminal, the first negative pole end and first Reference edge；First positive terminal is grounded, and first negative pole end electrically connects with first in-phase input end of first amplifier；Should First reference edge is electrically connected by first bleeder circuit with the fixed voltage source；The second benchmark comparison circuit can including second Adjust reference voltage source and the second bleeder circuit；The second adjustable reference voltage source includes the second positive pole, the second negative pole and the second ginseng Examine end；Second plus earth, second negative pole electrically connect with second in-phase input end of second amplifier；Second ginseng End is examined to electrically connect with the fixed voltage source by second bleeder circuit.

9. battery formation circuit as claimed in claim 8, it is characterised in that：The battery formation circuit, which also includes limiting voltage, to be protected Module is protected, the limiting voltage module includes the second photoelectrical coupler and the 3rd benchmark comparison circuit, the 3rd benchmark comparison circuit It is identical with the circuit structure of the first benchmark comparison circuit, second photoelectrical coupler include the 5th end, the 6th end, the 7th end and 8th end, the 5th end electrically connect with the voltage acquisition point, and the 6th end electrically connects with the 3rd benchmark comparison circuit, and the 7th End electrically connects with the current detecting pin；8th end electrically connects with the reference voltage pin.

10. battery formation circuit as claimed in claim 9, it is characterised in that：The battery formation circuit also includes carrying current Protection module, the carrying current protection module include transformer and the 3rd diode, and the transformer includes primary side and primary side, The primary side includes the 9th end and the tenth end, and the primary side includes the tenth one end and the 12nd end, the 9th end with this first just Pole electrically connects, and the tenth end electrically connects with the input pole of the switch element, and the tenth one end passes through voltage regulation resistance and the tenth Two ends are electrically connected, and the 12nd end ground connection, the tenth one end is also electrically connected by the 3rd diode with the current detecting pin, The positive pole of 3rd diode electrically connects with the tenth one end, and the negative pole of the 3rd diode is electrically connected with the current detecting pin Connect.