CN102969757A - Micro-current constant voltage device - Google Patents
Micro-current constant voltage device Download PDFInfo
- Publication number
- CN102969757A CN102969757A CN2012104446582A CN201210444658A CN102969757A CN 102969757 A CN102969757 A CN 102969757A CN 2012104446582 A CN2012104446582 A CN 2012104446582A CN 201210444658 A CN201210444658 A CN 201210444658A CN 102969757 A CN102969757 A CN 102969757A
- Authority
- CN
- China
- Prior art keywords
- voltage
- resistance
- circuit
- constant
- current constant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a micro-current constant voltage device. The device is applied to a constant current constant voltage charging circuit. The device comprises a peak suppression circuit and a voltage stabilizing circuit, wherein one or more capacitors are connected in parallel to form the peak suppression circuit, the peak suppression circuit is connected between the cathode and the anode of the output end of the constant current constant voltage charging circuit, the voltage stabilizing circuit consists of a voltage stabilizing control circuit, an electronic switch and a shunt resistor, the electronic switch and the shunt resistor are connected in series and are connected between the cathode and the anode of the output end of the constant current constant voltage charging circuit, the voltage stabilizing control circuit has a proportionality coefficient of less than one, the output end of the voltage stabilizing control circuit is connected to a control end of the electronic switch, the voltage stabilizing control circuit is based whether the product of the output voltage value of the constant current constant voltage charging circuit and the proportionality coefficient is larger than the constant voltage setting value of the constant current constant voltage charging circuit, and the electronic switch is controlled to be connected or disconnected. By the aid of the device, the peak voltage output by the constant current constant voltage charging circuit can be suppressed and the voltage stabilizing output of the constant current constant voltage charging circuit can be maintained during the no loading.
Description
Technical field
The present invention relates to a kind of voltage-stabilizing protection device, specifically a kind of little electric current constant-voltage equipment that is applied to the constant-current constant-voltage charging circuit.
Background technology
The rechargeable type battery generally by battery protecting plate to its battery core overcharge, overdischarge and short-circuit protection.Protection switch is the battery protecting plate performer that realization is protected to battery core, and battery protecting plate detects battery and whether has abnormal conditions, by the break-make of protection switch control battery battery core and battery plus-negative plate ear.Protection switch is closed under normal circumstances, and battery core and battery plus-negative plate ear are conductings, and battery can discharge and recharge; Protection switch disconnects under the abnormal conditions when occurring, and the positive and negative lug of battery only is connected with battery protecting plate, thereby and disconnects the battery core realization to the protection of battery.
In the production process of rechargeable type battery, for the quality to battery is carried out management and control, need to carry out the constant-current constant-voltage charging test to finished product or half-finished battery, and battery protecting plate is carried out performance test.As shown in Figure 1, adopt constant-current constant-voltage charging circuit commonly used that battery is carried out charging measurement, the access of battery forward is between the output head anode I+ and negative pole of output end I-of constant-current constant-voltage charging circuit, and the constant-current constant-voltage charging circuit is sampled to its output voltage V in by sampling measurement circuit V+ and V-.When the disconnection of abnormal conditions protection switch appears in battery, because the battery core of battery disconnects, charging current moment of battery is reduced to zero, and the positive and negative lug of battery protecting plate this moment by battery still is connected with the constant-current constant-voltage charging circuit, the voltage that is carried on the battery protecting plate raises rapidly, although the constant-current constant-voltage charging circuit all has the constant voltage circuit that is provided with constant voltage set point Vset, this constant voltage circuit can start with regulated output voltage when charging circuit output voltage V in is increased to constant voltage set point Vset, but because there is the response time in constant voltage circuit, output voltage still can produce peak voltage because of raising fast, charging current value originally is larger, the peak voltage value that produces is then larger, particularly the peak voltage value is especially large under the constant current charge state, is easy to cause the damage of battery protecting plate; And, after disconnecting, protection switch can cause the constant-current constant-voltage charging circuit unloaded, can't continue to keep the voltage stabilizing state, and therefore the constant-current constant-voltage charging operating mode is cancelled, and also test job is exerted an influence, and makes charging measurement have potential safety hazard.
Summary of the invention
The purpose of this invention is to provide a kind of little electric current constant-voltage equipment, it is applied in the constant-current constant-voltage charging circuit, can suppress the peak voltage of constant-current constant-voltage charging circuit output also so that it keeps voltage stabilizing output when zero load.
The objective of the invention is to realize by following technical measures:
A kind of little electric current constant-voltage equipment is characterized in that described little electric current constant-voltage equipment is applied in the constant-current constant-voltage charging circuit, and this device comprises peak restrained circuit and voltage stabilizing circuit; Described peak restrained circuit is comprised of one or above energy storage capacitor, wherein two or more described energy storage capacitors is in parallel, this energy storage capacitor branch road is connected between the output head anode and negative pole of output end of constant-current constant-voltage charging circuit, described voltage stabilizing circuit is by controlling circuit of voltage regulation, electronic switch and shunt resistance form, described electronic switch and shunt resistance are in series and this series arm is connected between the output head anode and negative pole of output end of constant-current constant-voltage charging circuit, described controlling circuit of voltage regulation is provided with the proportionality coefficient less than 1, the output of this controlling circuit of voltage regulation is connected to the control end of described electronic switch, described controlling circuit of voltage regulation whether greater than the constant voltage set point of constant-current constant-voltage charging circuit, is controlled described electronic switch conducting or disconnection based on the product of the output voltage values of constant-current constant-voltage charging circuit and described proportionality coefficient.The peak restrained circuit suppresses the voltage jump response, it is the peak voltage that its decrease uptake constant-current constant-voltage charging circuit produces, in the situation of constant-current constant-voltage charging circuit zero load, controlling circuit of voltage regulation is at the product of the output voltage values of constant-current constant-voltage charging circuit and proportionality coefficient during greater than the constant voltage set point, by controlling the electronic switch conducting so that shunt resistance and peak restrained circuit are in parallel, the electric charge of storing in the peak restrained circuit discharges to reduce the output voltage of constant-current constant-voltage charging circuit by shunt resistance, otherwise then control the electronic switch cut-off, so that the peak restrained circuit charges to improve the output voltage of constant-current constant-voltage charging circuit, thereby so that the constant-current constant-voltage charging circuit keeps voltage stabilizing output when zero load.
As a kind of improvement of the present invention, described little electric current constant-voltage equipment also is provided with one-level or the above voltage stabilizing circuit; The proportionality coefficient of controlling circuit of voltage regulation and the resistance of shunt resistance are all successively decreased successively in the described voltage stabilizing circuit at different levels.Rising along with the constant-current constant-voltage charging circuit output voltage, proportionality coefficient and the large voltage stabilizing circuit of shunt resistance resistance work first, namely access successively the shunt resistance of peak restrained circuit, the shunt current of their place branch roads increases gradually, little electric current constant-voltage equipment can be according to the size of constant-current constant-voltage charging circuit output voltage, for the peak restrained circuit accesses the voltage stabilizing circuit of respective numbers and guarantees that the peak restrained circuit discharges the speed of electric charge, make the constant-current constant-voltage charging circuit can keep efficiently voltage stabilizing output.
As a kind of improvement of the present invention, described little electric current constant-voltage equipment also comprises conversion hysteria relay and access control circuit; Described conversion hysteria relay has control coil and the first contact combination, described the first contact combination is connected between the output head anode of described peak restrained circuit and constant-current constant-voltage charging circuit, wherein the moving contact of the first contact combination is connected with described peak restrained circuit, the normally opened contact of the first contact combination is connected with the output head anode of described constant-current constant-voltage charging circuit, the normally-closed contact of the first contact combination is unsettled, the output of described access control circuit is connected with the control coil of conversion hysteria relay, whether the access control circuit normally is connected to based on battery between the output head anode and negative pole of output end of constant-current constant-voltage charging circuit, by the contact combination double-throw contact of control coil control conversion hysteria relay.By the access control circuit, the peak restrained circuit only between the output head anode and negative pole of output end of access constant-current constant-voltage charging circuit in the correct situation of battery attaching, avoids reverse voltage to the damage of peak restrained circuit.
As preferred implementation of the present invention, described little electric current constant-voltage equipment also comprises power resistor, described relay also has the second contact combination, the moving contact of described the second contact combination is connected with the tie point of the first contact combination with the peak restrained circuit, the normally-closed contact of the second contact combination is connected to the negative pole of output end of constant-current constant-voltage charging circuit by power resistor, and the normally opened contact of the second contact combination is unsettled.In the incorrect situation of battery attaching, peak restrained circuit and constant-current constant-voltage charging circuit disconnect, and discharge the electric charge of its storage in order to again devote oneself to work by power resistor, and the operating efficiency of little electric current constant-voltage equipment is improved.
As one embodiment of the present invention, described access control circuit comprises for the battery that accesses the constant-current constant-voltage charging circuit is carried out the voltage sampling circuit of voltage sample, the Drive and Control Circuit that is provided with the access control threshold values and relay drive circuit; Described voltage sampling circuit, Drive and Control Circuit are connected with relay drive circuit and are connected, the sampling input of voltage sampling circuit is connected to the output of constant-current constant-voltage charging circuit, the output of relay drive circuit is connected to the control coil of described conversion hysteria relay, described Drive and Control Circuit whether greater than described access control threshold values, is controlled described control coil energising or outage by relay drive circuit based on the voltage sample value of voltage sampling circuit input.
Compared with prior art, the present invention has following beneficial effect:
The first, the present invention can suppress the peak voltage of constant-current constant-voltage charging circuit output and so that it keeps voltage stabilizing output when zero load, realize the voltage-stabilizing protection to the constant-current constant-voltage charging circuit;
The second, circuit structure of the present invention is simple, and operating current is little, and is little on the normal operation impact of constant-current constant-voltage charging circuit;
The 3rd, the present invention can by multistage voltage stabilizing circuit is set, improve speed and stability to the voltage-stabilizing protection of constant-current constant-voltage charging circuit.
Description of drawings
The present invention is described in further detail below in conjunction with the drawings and specific embodiments:
Fig. 1 is the connection diagram of constant-current constant-voltage charging circuit and rechargeable type battery;
Fig. 2 is schematic block circuit diagram of the present invention;
Fig. 3 is circuit theory diagrams of the present invention.
Embodiment
As shown in Figures 2 and 3, little electric current constant-voltage equipment of the present invention is applied in the constant-current constant-voltage charging circuit, and this device comprises two-stage voltage stabilizing circuit, peak restrained circuit MD5, conversion hysteria relay, access control circuit and power resistor R9.
First order voltage stabilizing circuit of the present invention is comprised of controlling circuit of voltage regulation MD1, electronic switch MD3 and shunt resistance R8, electronic switch MD3 and shunt resistance R8 are in series and this series arm is connected between the output head anode I+ and negative pole of output end I-of constant-current constant-voltage charging circuit, controlling circuit of voltage regulation MD1 is provided with the proportionality coefficient less than 1, and the output of this controlling circuit of voltage regulation MD1 is connected to the control end of electronic switch MD3.Referring to Fig. 3, controlling circuit of voltage regulation MD1 comprises resistance R 1, resistance R 3, divider resistance R6, divider resistance R5, capacitor C 1 and operational amplifier U1; Wherein, the ratio of divider resistance R5 resistance and divider resistance R6 and divider resistance R5 resistance sum is the proportionality coefficient of controlling circuit of voltage regulation MD1, one end of resistance R 1 is the first input end for the controlling circuit of voltage regulation MD1 that receives constant voltage set point Vset, the other end of resistance R 1 is connected with the inverting input of operational amplifier U1, the end of divider resistance R6 is the second input for the controlling circuit of voltage regulation MD1 that receives output voltage values Vin, the other end of divider resistance R6 is by divider resistance R5 ground connection, resistance R 3 is connected between the tie point of the in-phase input end of operational amplifier U1 and divider resistance R6 and divider resistance R5, capacitor C 1 is connected between the inverting input and output of operational amplifier U1, the first input end of controlling circuit of voltage regulation MD1 and the second input are connected respectively to the corresponding port of constant-current constant-voltage circuit, and the output of operational amplifier U1 is connected to the control end of electronic switch MD3.Electronic switch MD3 comprises resistance R 2, triode Q1, diode D1, capacitor C 3, resistance R 7, resistance R 4 and optocoupler U2A; One end of resistance R 2 is the control end of electronic switch MD3, the other end of resistance R 2 is connected with the base stage of triode Q1, the collector electrode of triode Q1 is connected to the power supply VCC of little electric current constant-voltage equipment, the emitter of triode Q1 is connected to the input anode of optocoupler U2A successively by diode D1 and resistance R 4, wherein the negative electrode of diode D1 is connected with resistance R 4, capacitor C 3 and resistance R 7 are in parallel and are connected between the negative electrode and ground end of diode D1, the input cathode ground connection of optocoupler U2A, the output head anode of optocoupler U2A is connected to the output head anode I+ of constant-current constant-voltage charging circuit, the negative pole of output end of optocoupler U2A is connected to the negative pole of output end I-of constant-current constant-voltage charging circuit by shunt resistance R8, and wherein the effect of diode D1 is to avoid the negative voltage that bears between the base stage of triode Q1 and the emitter and puncture.
The second level of the present invention voltage stabilizing circuit is comprised of controlling circuit of voltage regulation MD2, electronic switch MD4 and shunt resistance R17, referring to Fig. 3, controlling circuit of voltage regulation MD2 comprises resistance R 10, resistance R 12, divider resistance R15, divider resistance R14, capacitor C 6 and operational amplifier U3; Wherein, the ratio of divider resistance R14 resistance and divider resistance R15 and divider resistance R14 resistance sum is the proportionality coefficient of controlling circuit of voltage regulation MD2.Electronic switch MD4 comprises resistance R 11, triode Q2, diode D2, capacitor C 8, resistance R 16, resistance R 13 and optocoupler U2B.Second level voltage stabilizing circuit is identical with the circuit connecting mode of first order voltage stabilizing circuit, do not repeat them here, their difference is: the proportionality coefficient of controlling circuit of voltage regulation MD2 is less than the proportionality coefficient of controlling circuit of voltage regulation MD1, and the resistance of shunt resistance R17 is less than the resistance of shunt resistance R8.
Conversion hysteria relay of the present invention has control coil JK1A, the first contact combination JK1B and the second contact combination JK1C, peak restrained circuit MD5 of the present invention is comprised of the capacitor C 4 that is in parallel and capacitor C 5, these two electric capacity are generally selected the jumbo polarity electrochemical capacitor that has, and suppress ability with the peak voltage that increases circuit.The first contact combination JK1B of conversion hysteria relay is connected between the output head anode I+ of peak restrained circuit MD5 and constant-current constant-voltage charging circuit, wherein the normally opened contact of the first contact combination JK1B is connected with the output head anode I+ of constant-current constant-voltage charging circuit, the normally-closed contact of the first contact combination JK1C is unsettled, the moving contact of the first contact combination JK1B is connected with peak restrained circuit MD5, an end that is capacitor C 4 and capacitor C 5 parallel branches is connected with the moving contact of the first contact combination JK1B, and the other end of capacitor C 4 and capacitor C 5 parallel branches is connected with the negative pole of output end I-of constant-current constant-voltage charging circuit; The moving contact of the second contact combination JK1C is connected with the tie point of peak restrained circuit MD5 with the first contact combination JK1B, the normally-closed contact of the second contact combination JK1C is connected to the negative pole of output end I-of constant-current constant-voltage charging circuit by power resistor R9, and the normally opened contact of the second contact combination JK1C is unsettled.
Access control circuit of the present invention comprises for the battery that accesses the constant-current constant-voltage charging circuit is carried out the voltage sampling circuit MD6 of voltage sample, the Drive and Control Circuit MD7 that is provided with the access control threshold values and relay drive circuit MD8; Voltage sampling circuit MD6, Drive and Control Circuit MD7 are connected with relay drive circuit MD8 and are connected, the sampling input of voltage sampling circuit MD6 is connected to the output of constant-current constant-voltage charging circuit, and the output of relay drive circuit MD8 is connected to the control coil JK1A of conversion hysteria relay.Referring to Fig. 3, voltage sampling circuit MD6 comprises capacitor C 9, resistance R 24, resistance R 20, resistance R 23, resistance R 18, operational amplifier U4 and resistance R 26; Capacitor C 9 and resistance R 24 are in parallel and their parallel branch is connected between the output head anode I+ and negative pole of output end I-of constant-current constant-voltage charging circuit, one end of capacitor C 9 is connected to the in-phase input end of operational amplifier U4 by resistance R 20, the other end is connected to the inverting input of operational amplifier U4 by resistance R 23, the in-phase input end of operational amplifier U4 is by resistance R 18 ground connection, and resistance R 26 is connected between the inverting input and output of operational amplifier U4.Drive and Control Circuit MD7 comprises resistance R 21, divider resistance R28, divider resistance R27, operational amplifier U5 and capacitor C 10; Resistance R 21 is connected between the in-phase input end of the output of operational amplifier U4 and operational amplifier U5, divider resistance R28 and divider resistance R27 are connected between the power supply VCC and ground end of little electric current constant-voltage equipment, and the tie point of divider resistance R28 and divider resistance R27 is connected with the inverting input of operational amplifier U5, capacitor C 10 is connected between the inverting input and output of operational amplifier U5, and the access control threshold values of Drive and Control Circuit MD7 is regulated by divider resistance R28 and divider resistance R27 dividing potential drop.Relay drive circuit MD8 comprises diode D4, resistance R 22, resistance R 25 and triode Q3; The anode of diode D4 is connected with the output of operational amplifier U5, the negative electrode of diode D4 is connected to the base stage of triode Q3 by resistance R 22, resistance R 25 is connected between the base stage and emitter of triode Q3, and the grounded emitter of triode Q3, the collector electrode of triode Q3 are connected to the power supply VCC of little electric current constant-voltage equipment by the control coil JK1A of conversion hysteria relay.
The constant-current constant-voltage charging circuit that utilization is equipped with little electric current constant-voltage equipment of the present invention detects battery, and job analysis of the present invention is as follows:
When battery access constant-current constant-voltage charging circuit carried out charging measurement, Drive and Control Circuit MD7 whether greater than its default access control threshold values, judged whether battery normally accesses based on the voltage sample value of voltage sampling circuit MD6 input.When the battery forward accesses, triode Q3 conducting among the relay drive circuit MD8, the control coil JK1A energising of conversion hysteria relay, so that the first contact combination JK1B and the second contact combination JK1C all switch to normally opened contact, capacitor C 4 and capacitor C 5 parallel branches are linked between the output head anode I+ and negative pole of output end I-of constant-current constant-voltage charging circuit, and disconnect with power resistor R9.When reverse battery accesses or does not access; triode Q3 cut-off among the relay drive circuit MD8; the control coil JK1A outage of conversion hysteria relay; the first contact combination JK1B and the second contact combination JK1C all remain on normally-closed contact; capacitor C 4, capacitor C 5 and power resistor R9 are in parallel and disconnect with the constant-current constant-voltage charging circuit; the electric charge that stores in capacitor C 4 and the capacitor C 5 discharges by power resistor R9, and protection electric capacity is unlikely is the reverse voltage damage.
After the normal access of battery, because tie point current potential Vin1=(R5/ (R5+R6)) the * Vin of resistance R 5 and resistance R 6 among the controlling circuit of voltage regulation MD1, the tie point current potential Vin2=of resistance R 14 and resistance R 15 (R14/ (R14+R15)) * Vin among the controlling circuit of voltage regulation MD2, and the proportionality coefficient of controlling circuit of voltage regulation MD2 is less than the proportionality coefficient of controlling circuit of voltage regulation MD1, so that current potential Vin2 is less than current potential Vin1.Therefore, when battery is in the constant current charge state, the output voltage values Vin of constant-current constant-voltage charging circuit is less than constant voltage set point Vset, current potential Vin2 and current potential Vin1 are all less than constant voltage set point Vset, operational amplifier U1 and U2 all export negative voltage, electronic switch MD3 and MD4 disconnect, and namely triode Q1, optocoupler U2A, triode Q2 and optocoupler U2B all end, so that shunt resistance R8 and R17 and peak restrained circuit MD5 disconnect.When battery is in the constant voltage charge state, the output voltage values Vin of constant-current constant-voltage charging circuit equals constant voltage set point Vset, current potential Vin2 and current potential Vin1 are all less than constant voltage set point Vset, and be same so that shunt resistance R8 and R17 and peak restrained circuit MD5 disconnection.
Battery abnormal conditions occur carrying out charging measurement; so that the protection switch of battery protecting plate disconnects; the battery core of battery and constant-current constant-voltage charging circuit disconnect; the constant-current constant-voltage charging circuit output head anode I+ and negative pole of output end I-between only be connected with capacitor C 4; capacitor C 5 and battery protecting plate; under constant-current constant-voltage charging circuit control with and the impact of distributed capacitance under; the output voltage values Vin of constant-current constant-voltage charging circuit rises thereby capacitor C 4 and capacitor C 5 are recharged; but protection switch disconnects moment generation peak voltage to be suppressed by capacitor C 4 and capacitor C 5; and the appearance value by Rational choice capacitor C 4 and capacitor C 5 can guarantee when suppressing peak voltage that capacitor C 4 and capacitor C 5 do not affect the dynamic characteristic of constant-current constant-voltage charging circuit.
Rising along with constant-current constant-voltage charging circuit output voltage value Vin, current potential Vin1 and current potential Vin2 rise thereupon, because current potential Vin2 is less than current potential Vin1, when voltage rises to current potential Vin1 current potential Vin2 is still less than constant voltage set point Vset greater than constant voltage set point Vset, analysis according to preamble, optocoupler U2A conducting this moment, shunt resistance R8 and peak restrained circuit MD5 are in parallel, and shunt resistance R17 still disconnects with peak restrained circuit MD5, and the electric charge in capacitor C 4 and the capacitor C 5 discharges by shunt resistance R8; If constant-current constant-voltage charging circuit output voltage value Vin still continues to rise, so that current potential Vin1 and current potential Vin2 are during all greater than constant voltage set point Vset, optocoupler U2A and the equal conducting of optocoupler U2B, shunt resistance R8, shunt resistance R17 and peak restrained circuit MD5 are in parallel, electric charge in capacitor C 4 and the capacitor C 5 discharges at faster speed by shunt resistance R8 and shunt resistance R17 simultaneously, and this moment since output voltage values Vin greater than constant voltage set point Vset, the constant voltage circuit of constant-current constant-voltage charging circuit works, so that charging current reduces, therefore these two shunt resistances consume rapidly the quantity of electric charge in capacitor C 4 and the capacitor C 5, so that constant-current constant-voltage charging circuit output voltage value Vin descends rapidly.And as current potential Vin1 and current potential Vin2 during all less than constant voltage set point Vset, optocoupler U2A and optocoupler U2B all end, shunt resistance R8 and shunt resistance R17 and peak restrained circuit MD5 disconnect, and output voltage values Vin stops to descend and it is close to constant voltage set point Vset.If this moment, the abnormal conditions of battery were not eliminated yet, because the constant voltage circuit of constant-current constant-voltage charging circuit fails at this moment, output voltage values Vin rises so capacitor C 4 and capacitor C 5 will be charged again, and said process will reappear.Therefore, the constant-current constant-voltage charging circuit occurs in the unusual situation at battery, what two shunt resistance place branch roads constantly repeated disconnects and access with peak restrained circuit MD5, the output voltage values Vin of constant-current constant-voltage charging circuit can maintain on the magnitude of voltage near constant voltage set point Vset, so that the constant-current constant-voltage charging circuit keeps the voltage stabilizing output state, be specially current potential Vin1=Vset, the output voltage values Vin=of constant-current constant-voltage charging circuit ((R5+R6)/R5) * Vset; And after battery elimination abnormal conditions protection switch connected again, current potential Vin1 and current potential Vin2 were all less than constant voltage set point Vset, and the constant-current constant-voltage charging circuit continues battery is carried out normal constant-current constant-voltage charging test.In addition, do not access battery and unloaded situation for the constant-current constant-voltage charging circuit, said process is applicable equally, and the output voltage values Vin of constant-current constant-voltage charging circuit can maintain on the magnitude of voltage near constant voltage set point Vset equally.
The present invention does not limit to and above-mentioned embodiment; according to foregoing; ordinary skill knowledge and customary means according to this area; do not breaking away under the above-mentioned basic fundamental thought of the present invention prerequisite; the present invention can also make the equivalent modifications of other various ways; replace or change; as the one-level voltage stabilizing circuit only is set among the above-mentioned embodiment; three grades and above voltage stabilizing circuit perhaps are set and the proportionality coefficient of controlling circuit of voltage regulation in the voltage stabilizing circuits at different levels and the resistance of shunt resistance are all arranged in the mode of successively decreasing successively; or the peak restrained circuit only is comprised of an electric capacity; or formed by three and above Capacitance parallel connection, all drop among protection scope of the present invention.
Claims (10)
1. little electric current constant-voltage equipment, it is characterized in that: described little electric current constant-voltage equipment is applied in the constant-current constant-voltage charging circuit, and this device comprises peak restrained circuit and voltage stabilizing circuit; Described peak restrained circuit is comprised of one or above energy storage capacitor, wherein two or more described energy storage capacitors is in parallel, this energy storage capacitor branch road is connected between the output head anode (I+) and negative pole of output end (I-) of constant-current constant-voltage charging circuit, described voltage stabilizing circuit is by controlling circuit of voltage regulation, electronic switch and shunt resistance form, described electronic switch and shunt resistance are in series and this series arm is connected between the output head anode (I+) and negative pole of output end (I-) of constant-current constant-voltage charging circuit, described controlling circuit of voltage regulation is provided with the proportionality coefficient less than 1, the output of this controlling circuit of voltage regulation is connected to the control end of described electronic switch, described controlling circuit of voltage regulation whether greater than the constant voltage set point (Vset) of constant-current constant-voltage charging circuit, is controlled described electronic switch conducting or disconnection based on the product of the output voltage values (Vin) of constant-current constant-voltage charging circuit and described proportionality coefficient.
2. little electric current constant-voltage equipment according to claim 1, it is characterized in that: described little electric current constant-voltage equipment also is provided with one-level or the above voltage stabilizing circuit; The proportionality coefficient of controlling circuit of voltage regulation and the resistance of shunt resistance are all successively decreased successively in the described voltage stabilizing circuit at different levels.
3. little electric current constant-voltage equipment according to claim 1 and 2, it is characterized in that: described little electric current constant-voltage equipment also comprises conversion hysteria relay and access control circuit; Described conversion hysteria relay has control coil (JK1A) and the first contact combination (JK1B), described the first contact combination (JK1B) is connected between the output head anode (I+) of described peak restrained circuit and constant-current constant-voltage charging circuit, wherein the moving contact of the first contact combination (JK1B) is connected with described peak restrained circuit, the normally opened contact of the first contact combination (JK1B) is connected with the output head anode (I+) of described constant-current constant-voltage charging circuit, the normally-closed contact of the first contact combination (JK1C) is unsettled, the output of described access control circuit is connected with the control coil (JK1A) of conversion hysteria relay, whether the access control circuit normally is connected to based on battery between the output head anode (I+) and negative pole of output end (I-) of constant-current constant-voltage charging circuit, by the contact combination double-throw contact of control coil (JK1A) control conversion hysteria relay.
4. little electric current constant-voltage equipment according to claim 3, it is characterized in that: described little electric current constant-voltage equipment also comprises power resistor (R9), described relay also has the second contact combination (JK1C), the moving contact of described the second contact combination (JK1C) is connected with the tie point of the first contact combination (JK1B) and peak restrained circuit, the normally-closed contact of the second contact combination (JK1C) is connected to the negative pole of output end (I-) of constant-current constant-voltage charging circuit by power resistor (R9), and the normally opened contact of the second contact combination (JK1C) is unsettled.
5. little electric current constant-voltage equipment according to claim 4, it is characterized in that: described controlling circuit of voltage regulation comprises the first resistance, the second resistance, the first divider resistance, the second divider resistance, the first electric capacity and the first operational amplifier; Wherein, the ratio of the second divider resistance resistance and the first divider resistance and the second divider resistance resistance sum is described proportionality coefficient, one end of described the first resistance is the first input end for the controlling circuit of voltage regulation that receives described constant voltage set point (Vset), the other end of the first resistance is connected with the inverting input of the first operational amplifier, one end of described the first divider resistance is the second input for the controlling circuit of voltage regulation that receives described output voltage values (Vin), the other end of the first divider resistance is by the second divider resistance ground connection, described the second resistance is connected between the tie point of the in-phase input end of the first operational amplifier and the first divider resistance and the second divider resistance, the first electric capacity is connected between the inverting input and output of the first operational amplifier, the first input end of described controlling circuit of voltage regulation and the second input are connected respectively to the corresponding port of constant-current constant-voltage circuit, and the output of described the first operational amplifier is connected to the control end of described electronic switch.
6. little electric current constant-voltage equipment according to claim 5, it is characterized in that: described electronic switch comprises the 3rd resistance, the first triode, the first diode, the second electric capacity, the 4th resistance, the 5th resistance and optocoupler; One end of described the 3rd resistance is the control end of electronic switch, the other end of the 3rd resistance is connected with the base stage of the first triode, the collector electrode of the first triode is connected to the power supply (VCC) of little electric current constant-voltage equipment, the emitter of the first triode is connected to the input anode of optocoupler successively by the first diode and the 5th resistance, wherein the negative electrode of the first diode is connected with the 5th resistance, the second electric capacity and the 4th resistance are in parallel and are connected between the negative electrode and ground end of the first diode, the input cathode ground connection of optocoupler, the output head anode of optocoupler is connected to the output head anode (I+) of constant-current constant-voltage charging circuit, and the negative pole of output end of optocoupler is connected to the negative pole of output end (I-) of constant-current constant-voltage charging circuit by described shunt resistance.
7. little electric current constant-voltage equipment according to claim 6 is characterized in that: described access control circuit comprises for the battery to access constant-current constant-voltage charging circuit and carries out the voltage sampling circuit of voltage sample, the Drive and Control Circuit that is provided with the access control threshold values and relay drive circuit; Described voltage sampling circuit, Drive and Control Circuit are connected with relay drive circuit and are connected, the sampling input of voltage sampling circuit is connected to the output of constant-current constant-voltage charging circuit, the output of relay drive circuit is connected to the control coil (JK1A) of described conversion hysteria relay, described Drive and Control Circuit whether greater than described access control threshold values, is controlled described control coil (JK1A) energising or outage by relay drive circuit based on the voltage sample value of voltage sampling circuit input.
8. little electric current constant-voltage equipment according to claim 7, it is characterized in that: described voltage sampling circuit comprises the 3rd electric capacity, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the second operational amplifier and the tenth resistance; Described the 3rd electric capacity and the 6th resistance are in parallel and their parallel branch is connected between the output head anode (I+) and negative pole of output end (I-) of constant-current constant-voltage charging circuit, one end of the 3rd electric capacity is connected to the in-phase input end of the second operational amplifier by the 7th resistance, the other end is connected to the inverting input of the second operational amplifier by the 8th resistance, the in-phase input end of the second operational amplifier is by the 9th grounding through resistance, and the tenth resistance is connected between the inverting input and output of the second operational amplifier.
9. little electric current constant-voltage equipment according to claim 8 is characterized in that: described Drive and Control Circuit comprises that the 11 resistance, the 3rd divider resistance, the 4th divider resistance, ternary calculate amplifier and the 4th electric capacity; The 11 resistance is connected to output and the ternary of described the second operational amplifier and calculates between the in-phase input end of amplifier, the 3rd divider resistance and the 4th divider resistance are connected between the power supply (VCC) and ground end of little electric current constant-voltage equipment, and the tie point of the 3rd divider resistance and the 4th divider resistance is connected with the inverting input that ternary is calculated amplifier, and the 4th electric capacity is connected to ternary and calculates between the inverting input and output of amplifier.
10. little electric current constant-voltage equipment according to claim 9, it is characterized in that: described relay drive circuit comprises the second diode, the 12 resistance, the 13 resistance and the second triode; The anode of the second diode is connected with the output that described ternary is calculated amplifier, the negative electrode of the second diode is connected to the base stage of the second triode by the 12 resistance, the 13 resistance is connected between the base stage and emitter of the second triode, and the grounded emitter of the second triode, the collector electrode of the second triode are connected to the power supply (VCC) of little electric current constant-voltage equipment by the control coil (JK1A) of described conversion hysteria relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210444658.2A CN102969757B (en) | 2012-11-08 | 2012-11-08 | Micro-current constant voltage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210444658.2A CN102969757B (en) | 2012-11-08 | 2012-11-08 | Micro-current constant voltage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102969757A true CN102969757A (en) | 2013-03-13 |
| CN102969757B CN102969757B (en) | 2015-03-25 |
Family
ID=47799712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210444658.2A Active CN102969757B (en) | 2012-11-08 | 2012-11-08 | Micro-current constant voltage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102969757B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107567130A (en) * | 2017-08-21 | 2018-01-09 | 矽力杰半导体技术(杭州)有限公司 | Power supply circuit and apply its LED drive circuit |
| CN107819455A (en) * | 2017-12-08 | 2018-03-20 | 成都前锋电子仪器有限责任公司 | A kind of level window control circuit |
| CN109066876A (en) * | 2018-08-31 | 2018-12-21 | 上海艾为电子技术股份有限公司 | A kind of switched charge chip and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118460A (en) * | 1994-05-31 | 1996-03-13 | 大宇电子株式会社 | Regulator with an overcurrent protection device |
| CN2265619Y (en) * | 1995-09-05 | 1997-10-22 | 何钢 | High-efficiency automatic charger for nickel-hydrogen single battery |
| JP2008033461A (en) * | 2006-07-27 | 2008-02-14 | Ricoh Co Ltd | Constant voltage power circuit |
| CN102095921A (en) * | 2009-12-11 | 2011-06-15 | 鸿富锦精密工业（深圳）有限公司 | Surging current test circuit |
-
2012
- 2012-11-08 CN CN201210444658.2A patent/CN102969757B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118460A (en) * | 1994-05-31 | 1996-03-13 | 大宇电子株式会社 | Regulator with an overcurrent protection device |
| CN2265619Y (en) * | 1995-09-05 | 1997-10-22 | 何钢 | High-efficiency automatic charger for nickel-hydrogen single battery |
| JP2008033461A (en) * | 2006-07-27 | 2008-02-14 | Ricoh Co Ltd | Constant voltage power circuit |
| CN102095921A (en) * | 2009-12-11 | 2011-06-15 | 鸿富锦精密工业（深圳）有限公司 | Surging current test circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107567130A (en) * | 2017-08-21 | 2018-01-09 | 矽力杰半导体技术(杭州)有限公司 | Power supply circuit and apply its LED drive circuit |
| CN107567130B (en) * | 2017-08-21 | 2023-09-12 | 矽力杰半导体技术(杭州)有限公司 | Power supply circuit and LED driving circuit applying same |
| CN107819455A (en) * | 2017-12-08 | 2018-03-20 | 成都前锋电子仪器有限责任公司 | A kind of level window control circuit |
| CN107819455B (en) * | 2017-12-08 | 2024-02-06 | 成都前锋电子仪器有限责任公司 | Level window control circuit |
| CN109066876A (en) * | 2018-08-31 | 2018-12-21 | 上海艾为电子技术股份有限公司 | A kind of switched charge chip and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102969757B (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102957173B (en) | Multi-cell serially-connected lithium battery pack equalization and protection system | |
| CN104600799A (en) | Balancing circuit and method of series battery pack | |
| CN107147197B (en) | Flexible following type intelligent charging method and charging device | |
| CN202111486U (en) | Lithium battery group intelligent charge and discharge supervisory control system used for electric bicycle | |
| CN102593795B (en) | Go here and there high-power lithium battery control panel more | |
| CN102957172B (en) | Multi-cell serially-connected lithium battery pack equalization and protection system | |
| CN103199312B (en) | The management method of battery current and device | |
| CN201562729U (en) | A balancing control circuit for lithium battery | |
| CN102969757A (en) | Micro-current constant voltage device | |
| CN102957175B (en) | Multi-cell serially-connected lithium battery pack equalization and protection system | |
| CN117318214A (en) | Battery pack high-voltage system and control method thereof | |
| CN202142882U (en) | Power battery charger having discharging function | |
| CN110912086A (en) | Reverse connection prevention protection circuit of storage battery charger | |
| CN103779839B (en) | A kind of automatic shutoff start-up circuit adopting rechargeable battery to power | |
| CN104283195A (en) | Storage battery protection circuit preventing overcharge | |
| CN2865021Y (en) | Equilibrium battery group | |
| CN112994196A (en) | Charging shunt power regulator | |
| CN203983422U (en) | The large electric current lithium ion battery group with self-protection function and extensibility | |
| CN208570834U (en) | Prolonging service life of battery mould group | |
| CN202798079U (en) | Charging/discharging protection circuit of lithium battery | |
| CN203193337U (en) | Power battery pack discharge equalizer | |
| CN102097846B (en) | Nickel-metal hydride battery pack charging device | |
| CN203398833U (en) | Battery charging/discharging circuit of uninterruptible power supply | |
| CN201174603Y (en) | Solar inverter | |
| CN201966795U (en) | Alternating current instant power down protection circuit for frequency conversion air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151211 Address after: Shiling Town, Huadu District, Guangzhou City, Guangdong province 511450 Yufeng Road No. 16 Patentee after: Qingtian Industry Co., Ltd., Guangzhou Address before: 510302 Xingang West Road, Guangdong, China, No. 204, No. Patentee before: China National Electric Apparatus Research Institute Co., Ltd. |