CN204441989U - A kind of charger of automatic adaptation lead-acid battery group voltage - Google Patents

A kind of charger of automatic adaptation lead-acid battery group voltage Download PDF

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CN204441989U
CN204441989U CN201520140643.6U CN201520140643U CN204441989U CN 204441989 U CN204441989 U CN 204441989U CN 201520140643 U CN201520140643 U CN 201520140643U CN 204441989 U CN204441989 U CN 204441989U
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circuit
voltage
resistance
chip
battery
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李成祥
郝建波
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Abstract

The utility model discloses a kind of charger of automatic adaptation lead-acid battery group voltage, comprises SCR Intelligent rectification circuit, switching power circuit, voltage sample circuit, battery voltage detection circuit and single chip machine controlling circuit.Single-chip microcomputer, according to the joint number of battery pack, exports a road control signal to scr rectification circuit, and control the angle of flow of scr rectification circuit, battery number is more, controls turn on thyristors angle larger, and the direct voltage that rectification exports is higher; Single-chip microcomputer exports the voltage sample circuit of the second road signal to Switching Power Supply, for changing the data of voltage sample circuit.By the cooperation control of above two aspects, the ratio of the high and low value of switch power source output voltage is made to reach 9 times.

Description

A kind of charger of automatic adaptation lead-acid battery group voltage
Technical field:
The utility model relates to a kind of lead-acid battery charger.Specifically, relating to a kind of by detecting battery voltage, judging lead-acid battery group joint number, determining the lead-acid battery charger of charging voltage, belong to electronic technology field.
Background technology
Along with growth in the living standard, the electric equipment such as electric bicycle, electric automobile using lead-acid battery to power is popularized, but different electric equipment, because the lead-acid battery joint number used is different, charger output voltage also just different, the charger of different electric equipment generally can not be used with, so each electric equipment is provided with special charger, this results in the rising of electric equipment cost.
Utility model content
The utility model for above deficiency, provide a kind of can to electric equipment use battery pack connect joint number number judge, and the lead-acid battery charger of the charger charging voltage determined.
When lead-acid battery has just been full of electricity, every batteries voltage ranges up to more than 12.5V, in use, voltage reduces gradually along with discharge process, when voltage drop to a certain extent time (such as 9V), the electric current that battery can export significantly reduces, and at this moment just needs again to charge.But when zero load, the change in voltage of battery is little, every batteries voltage substantially all between 11.5V-12.5V, so voltage time unloaded by lead-acid battery group, can judge the series connection joint number of battery pack.
Lead-acid battery charger described in the utility model, be provided with battery voltage detection circuit, effect is before charger starts charging to battery pack, first battery floating voltage is measured, voltage signal is changed road through A/D and converts 8 bit binary number signals to, be transported to single chip circuit, single chip circuit is by the voltage value that records divided by 11.5, and round numbers N is as the foundation judging serial battery joint number.Single chip circuit exports two path control signal according to battery number, and a road controls the angle of flow of scr rectification circuit, and adjustment scr rectification circuit output voltage, makes the direct voltage of supply Switching Power Supply be suitable numerical value; Another road control voltage sample circuit, chooses applicable data, and make switch power source output voltage be (12*N+2) V, charging voltage exceeds 2V than cell voltage, and in this charger, adaptable battery number N is 1-9 joint.
This charger have employed scr rectification circuit, because the duty ratio of switch power module TL494 is between 10%-50%, according to the operation principle of Switching Power Supply, during Switching Power Supply use diode rectification, the direct voltage of rectification circuit supply Switching Power Supply is fixing 300V, the output voltage changing Switching Power Supply can only be realized, so the highest and minimum voltage ratio of Switching Power Supply energy output voltage is 4 times by the data of the voltage sample circuit of adjustment Switching Power Supply.If make switch power source output voltage adapt to the charging of 1-9 batteries, then output ceiling voltage and minimum voltage ratio are 9 times, so adopt general diode rectifier circuit, the ratio that can not realize output voltage height low value reaches the charger of 9 times.
In this charger, single-chip microcomputer, according to the series connection joint number of battery pack, exports a road control signal to scr rectification circuit, control the angle of flow of scr rectification circuit, serial battery joint number is more, controls turn on thyristors angle larger, and the direct voltage that rectification exports is higher; Single-chip microcomputer exports the voltage sample circuit of the second road signal to Switching Power Supply, for changing the data of voltage sample circuit, the output voltage of voltage sample circuit is sampling voltage, sampling voltage is produced by sample circuit dividing potential drop from switch power source output voltage, voltage sample circuit data determine sampling voltage and electric power output voltage ratio, and Switching Power Supply being by changing output voltage, making sampling voltage equal with the reference voltage of power supply, realizing voltage stabilizing object.Therefore, also just there is different output voltages in the different duty of the data determine switch power supply of different voltage sample circuits.By the cooperation control of above two aspects, the ratio of the high and low value of switch power source output voltage is made to reach 9 times.
For overcoming the above problems, the technical scheme that the utility model adopts is: a kind of charger of automatic adaptation lead-acid battery group voltage, comprises SCR Intelligent rectification circuit, switching power circuit, voltage sample circuit, battery voltage detection circuit and single chip machine controlling circuit;
SCR Intelligent rectification circuit, receives the control signal of single chip machine controlling circuit, changes turn on thyristors angle, the direct voltage that adjustment rectification exports;
Switching power circuit, by changing the data of voltage sample circuit, exports the voltage-stabilized power supply circuit being applicable to batteries charging voltage;
Voltage sample circuit, it is a component units of switching power circuit, be made up of two upper sample resistances in parallel and two lower sample resistances in parallel, each sample resistance is connected with a field effect transistor respectively, under the control of single chip machine controlling circuit, by the conducting of different effect pipe, one or two above sample resistances and one or two lower sample resistances connections can be selected, obtain the combination of 9 kinds of sample resistances altogether, often kind of corresponding a kind of output voltage of sample resistance value Switching Power Supply, the exportable 9 kinds of magnitudes of voltage of switching power circuit;
Described battery voltage detection circuit, measures battery floating voltage, voltage signal is changed road through A/D and converts 8 bit binary number signals to single chip circuit, as the foundation judging battery number;
Single chip machine controlling circuit, receive the signal of battery voltage detection circuit, judge the joint number of battery, two path control signal is exported according to battery number, one tunnel controls the angle of flow of SCR Intelligent commutating voltage, the numerical value of another road control voltage sample circuit, makes Switching Power Supply export corresponding burning voltage.
SCR Intelligent rectification circuit is by chip IC 1, IC 2, resistance R 1-R 5, capacitor C 1-C 2composition; Chip IC 1for intelligent controlled rectification chip, model is MJYD-JL-100, chip IC 1two exchange termination 220V alternating currents, two DC terminal shunt-wound capacitance C 1, chip IC 1dC power supply terminal DC12V connect 12V power supply, two earth terminal GND ground connection, chip IC 1control end CON outer meeting resistance R 5, R 5another termination integrated transporting discharging IC 2, IC 2integrated transporting discharging IC 2model be LM324, IC 2output and resistance R 3tie point, R 3another termination and amplifier IC 2end of oppisite phase, IC 2in-phase end through resistance R 4ground connection, IC 2end of oppisite phase connecting resistance R 2, R 2other end connecting resistance R 1with C 2tie point, C 2other end ground connection, R 1the other end connect single chip machine controlling circuit.
Switch power supply route chip IC 3form with peripheral cell, chip IC 3for power supply special chip, model is TL494; Chip IC 31 pin connecting resistance R 6, R 6another termination voltage sample circuit output V f, voltage sample circuit "+", "-" connect positive pole and the negative pole of battery respectively, form voltage feedback circuit, realize stabilized voltage power supply; Current sampling resistor R 13one end ground connection, other end connecting resistance R 11, resistance R 11another termination chip IC 315 pin, realize current feedback circuit, form current-limiting protection circuit.
Voltage sample circuit is by chip IC 4, IC 5, field effect transistor T 1-T 4, resistance R 14-R 29composition; Chip IC 4, IC 5for double operational, model is LM324, four transport and placing devices and peripheral resistance R 14, R 15, R 16, R 17, R 18, R 19, R 24, R 25, R 26, R 27, R 28, R 29form 4 inverting amplifiers, the control signal that single chip machine controlling circuit (4) exports is through resistance R 14, R 17, R 26, R 29, be input to the inverting input of 4 inverting amplifiers respectively; The output signal of 4 inverting amplifiers hinders R respectively through resistance 16, R 19, R 24, R 27meet field effect transistor T 1-T 4grid, field effect transistor T 1, T 3source electrode and field effect transistor T 2, T 4drain electrode be connected together, connect sampling voltage output V f, field effect transistor T 1, T 3drain electrode respectively connecting resistance R 20and R 22, resistance R 20and R 22the positive pole that another termination power exports, resistance R 20and R 22for upper sample resistance; Field effect transistor T 2, T 4source electrode respectively connecting resistance R 21and R 23, resistance R 21and R 23other end ground connection, resistance R 21and R 23for lower sample resistance.
Battery voltage detection circuit is by chip IC 6, resistance R 30and R 31composition, resistance R 30and R 31series connection, upper termination anode, lower end ground connection, R 30and R 31the connection of 26 pin of tie point and chip, chip IC 68,14,15,17,18,19,20 and 21 pin connect single chip circuit, chip IC 6model is ADC0809, is A/D conversion chip, exports 8 position digital signals to single chip machine controlling circuit, realizes the front voltage detecting function of battery charging.
Basis is novel takes above technical scheme, compared with prior art, has the following advantages: this charger to the electric equipment charging using battery voltage different, can realize a charger multiplex, saved the cost of electric equipment, used convenient.
Be described further originally novel below in conjunction with accompanying drawing and enforcement.
Accompanying drawing explanation
Accompanying drawing 1 is the block diagram of the charger of a kind of automatic adaptation lead-acid battery group voltage in this new embodiment;
Accompanying drawing 2 is the SCR Intelligent rectification circuit figure of the charger of a kind of automatic adaptation lead-acid battery group voltage in this new embodiment;
Accompanying drawing 3 is the Switching Power Supply structure chart of the charger of a kind of automatic adaptation lead-acid battery group voltage in this new embodiment;
Accompanying drawing 4 is the voltage sample circuit structure figure of the charger of a kind of automatic adaptation lead-acid battery group voltage in this new embodiment;
Accompanying drawing 5 is the battery voltage detection circuit structure chart of the charger of a kind of automatic adaptation lead-acid battery group voltage in this new embodiment;
In figure:
1-SCR Intelligent rectification circuit, 2-switching power circuit, 3-battery voltage detection circuit, 4-single chip machine controlling circuit, 5-voltage sample circuit.
Embodiment
As shown in Figure 1, a kind of charger of automatic adaptation lead-acid battery group voltage, comprises SCR Intelligent rectification circuit 1, switching power circuit 2, voltage sample circuit, battery voltage detection circuit 3 and single chip machine controlling circuit 4.
SCR Intelligent rectification circuit 1 is the rectification circuit that can change output voltage under control signal effect.
Switching power circuit 2, being the data by changing voltage sample circuit, can changing the voltage-stabilized power supply circuit of output voltage size;
Battery voltage detection circuit 3, measures battery floating voltage, voltage signal is changed road through A/D and converts 8 bit binary number signals to single chip circuit 4, as the foundation judging battery number.
Voltage sample circuit, it is a unit of switching power circuit, be made up of two upper sample resistances in parallel and two lower sample resistances in parallel, each sample resistance is connected with an effect pipe, under the control of single-chip microcomputer, by the conducting of different effect pipe, one or two above sample resistances and one or two lower sample resistances connections can be selected, obtain the combination of 9 kinds of sample resistances altogether, the corresponding exportable 9 kinds of magnitudes of voltage of power supply.
Single chip machine controlling circuit 4, receive the signal of battery voltage detection circuit 3, judge the joint number of battery, two path control signal is exported according to battery number, one tunnel controls the angle of flow of SCR Intelligent rectification circuit 1, the numerical value of another road control voltage sample circuit 5, makes switching power circuit 2 export corresponding burning voltage.
As shown in Figure 2, SCR Intelligent rectification circuit 1 is by chip IC 1, IC 2, resistance R 1-R 5, capacitor C 1-C 2composition; Chip IC 1for intelligent controlled rectification chip, model is MJYD-JL-100, chip IC 1two exchange termination 220V alternating currents, two DC terminal shunt-wound capacitance C 1, chip IC 1dC power supply terminal DC12V connect 12V power supply, two earth terminal GND ground connection, chip IC 1control end CON outer meeting resistance R 5, R 5another termination integrated transporting discharging IC 2, IC 2integrated transporting discharging C 2model be LM324, IC 2output and resistance R 3tie point, R 3another termination and amplifier IC 2end of oppisite phase, IC 2in-phase end through resistance R 4ground connection, IC 2end of oppisite phase connecting resistance R 2, R 2other end connecting resistance R 1with C 2tie point, C 2other end ground connection, R 1the other end connect single chip machine controlling circuit 4.
As shown in Figure 3, switching power circuit 2 is by chip IC 3form with peripheral cell, chip IC 3for power supply special chip, model is TL494; Chip IC 31 pin connecting resistance R 6, R 6another termination voltage sample circuit 5 output V f, voltage sample circuit 5 "+", "-" connect positive pole and the negative pole of battery respectively, form voltage feedback circuit, realize stabilized voltage power supply; Current sampling resistor R 13one end ground connection, other end connecting resistance R 11, resistance R 11another termination chip IC 315 pin, realize current feedback circuit, form current-limiting protection circuit.
As shown in Figure 4, voltage sample circuit 5 is by chip IC 4, IC 5, field effect transistor T 1-T 4, resistance R 14-R 29composition; Chip IC 4, IC 5for double operational, model is LM324, four transport and placing devices and peripheral resistance R 14, R 15, R 16, R 17, R 18, R 19, R 24, R 25, R 26, R 27, R 28, R 29form 4 inverting amplifiers, the control signal that single chip machine controlling circuit 4 exports is through resistance R 14, R 17, R 26, R 29, be input to the inverting input of 4 inverting amplifiers respectively; The output signal of 4 inverting amplifiers hinders R respectively through resistance 16, R 19, R 24, R 27meet field effect transistor T 1-T 4grid, field effect transistor T 1, T 3source electrode and field effect transistor T 2, T 4drain electrode be connected together, connect sampling voltage output V f, field effect transistor T 1, T 3drain electrode respectively connecting resistance R 20and R 22, resistance R 20and R 22the positive pole that another termination power exports, resistance R 20and R 22for upper sample resistance; Field effect transistor T 2, T 4source electrode respectively connecting resistance R 21and R 23, resistance R 21and R 23other end ground connection, resistance R 21and R 23for lower sample resistance.
As shown in Figure 5, battery voltage detection circuit 3 is by chip IC 6, resistance R 30and R 31composition, resistance R 30and R 31series connection, upper termination anode, lower end ground connection, R 30and R 31the connection of 26 pin of tie point and chip, chip IC 68,14,15,17,18,19,20 and 21 pin connect single chip circuit, chip IC 6model is ADC0809, is A/D conversion chip, exports 8 position digital signals to single chip machine controlling circuit, realizes the front voltage detecting function of battery charging.
Below be only a physical circuit of the present utility model, the utility model is not limited to above circuit, and the change that any those skilled in the art does in scope of the present utility model is encompassed among the utility model the scope of the claims.

Claims (5)

1. automatically adapt to a charger for lead-acid battery group voltage, comprise SCR Intelligent rectification circuit (1), switching power circuit (2), voltage sample circuit (5), battery voltage detection circuit (3) and single chip machine controlling circuit (4);
It is characterized in that:
Described SCR Intelligent rectification circuit (1), receives the control signal of single chip machine controlling circuit (4), changes turn on thyristors angle, adjustment rectifier output voltage;
Described switching power circuit (2), by changing the data of voltage sample circuit (5), exports the voltage-stabilized power supply circuit being applicable to batteries charging voltage;
Described voltage sample circuit (5), it is a component units of switching power circuit (2), be made up of two upper sample resistances in parallel and two lower sample resistances in parallel, each sample resistance is connected with a field effect transistor respectively, under the control of single chip machine controlling circuit (4), by the conducting of different effect pipe, one or two above sample resistances and one or two lower sample resistances connections can be selected, obtain the combination of 9 kinds of sample resistances altogether, each sample resistance value Switching Power Supply correspondence exports a kind of voltage, the exportable 9 kinds of magnitudes of voltage of switching power circuit (2),
Described battery voltage detection circuit (3), measures battery floating voltage, voltage signal is changed road through A/D and converts 8 bit binary number signals to single chip circuit (4), as the foundation judging serial battery joint number;
Described single chip machine controlling circuit (4), receive the signal of battery voltage detection circuit (3), judge the series connection joint number of battery, two path control signal is exported according to serial battery joint number, one tunnel controls the angle of flow of SCR Intelligent rectification circuit (1), the numerical value on another road control voltage sample circuit (5), makes Switching Power Supply export corresponding burning voltage.
2. the charger of a kind of automatic adaptation lead-acid battery group voltage as claimed in claim 1, is characterized in that: described SCR Intelligent rectification (1) circuit is by chip IC 1, IC 2, resistance R 1-R 5, capacitor C 1-C 2composition; Chip IC 1for intelligent controlled rectification chip, model is MJYD-JL-100, chip IC 1two exchange termination 220V alternating currents, two DC terminal shunt-wound capacitance C 1, chip IC 1dC power supply terminal DC12V connect 12V power supply, two GND earth terminal ground connection, chip IC 1control end CON outer meeting resistance R 5, R 5another termination integrated transporting discharging IC 2, integrated transporting discharging IC 2model be LM324, IC 2output and resistance R 3tie point, R 3another termination and amplifier IC 2end of oppisite phase, IC 2in-phase end through resistance R 4ground connection, IC 2end of oppisite phase connecting resistance R 2, R 2other end connecting resistance R 1with C 2tie point, C 2other end ground connection, R 1the other end connect single chip machine controlling circuit (4).
3. the charger of a kind of automatic adaptation lead-acid battery group voltage as claimed in claim 1, is characterized in that: described switching power circuit (2) is by chip IC 3form with peripheral cell, chip IC 3for power supply special chip, model is TL494; Chip IC 31 pin connecting resistance R 6, R 6another termination voltage sample circuit (5) output V f, voltage sample circuit (5) "+", "-" end connect positive pole and the negative pole of battery respectively, form voltage feedback circuit, realize stabilized voltage power supply; Current sampling resistor R 13one end ground connection, other end connecting resistance R 11, resistance R 11another termination chip IC 315 pin, realize current feedback circuit, form current-limiting protection circuit.
4. the charger of a kind of automatic adaptation lead-acid battery group voltage as claimed in claim 1, is characterized in that: described voltage sample circuit (5) is by chip IC 4, IC 5, field effect transistor T 1-T 4, resistance R 14-R 29composition; Chip IC 4, IC 5for double operational, model is LM324, four transport and placing device IC 4A, IC 4B, IC 5A, IC 5Bwith peripheral resistance R 14, R 15, R 16, R 17, R 18, R 19, R 24, R 25, R 26, R 27, R 28, R 29form 4 inverting amplifiers, the control signal that single chip machine controlling circuit (4) exports is through resistance R 14, R 17, R 26, R 29, be input to the inverting input of 4 inverting amplifiers respectively; The output signal of 4 inverting amplifiers is respectively through resistance R 16, R 19, R 24, R 27meet field effect transistor T 1-T 4grid, field effect transistor T 1, T 3source electrode and field effect transistor T 2, T 4drain electrode be connected together, connect sampling voltage output V f, field effect transistor T 1, T 3drain electrode respectively connecting resistance R 20and R 22, resistance R 20and R 22the positive pole that another termination power exports, resistance R 20and R 22for upper sample resistance; Field effect transistor T 2, T 4source electrode respectively connecting resistance R 21and R 23, resistance R 21and R 23other end ground connection, resistance R 21and R 23for lower sample resistance.
5. the charger of a kind of automatic adaptation lead-acid battery group voltage as claimed in claim 1, is characterized in that: described battery voltage detection circuit (3) is by chip IC 6, resistance R 30and R 31composition, resistance R 30and R 31series connection, upper termination anode, lower end ground connection, R 30and R 31tie point and chip IC 6the connection of 26 pin, chip IC 68,14,15,17,18,19,20 and 21 pin connect single chip circuit, chip IC 6model is ADC0809, is A/D conversion chip, exports 8 position digital signals to single chip machine controlling circuit, realizes the front voltage detecting function of battery charging.
CN201520140643.6U 2015-03-13 2015-03-13 A kind of charger of automatic adaptation lead-acid battery group voltage Withdrawn - After Issue CN204441989U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104682529A (en) * 2015-03-13 2015-06-03 李成祥 Charger automatically adaptive to lead-acid battery pack voltage
CN105048613A (en) * 2015-09-02 2015-11-11 泉州市海通电子设备有限公司 Electric vehicle intelligent charger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104682529A (en) * 2015-03-13 2015-06-03 李成祥 Charger automatically adaptive to lead-acid battery pack voltage
CN105048613A (en) * 2015-09-02 2015-11-11 泉州市海通电子设备有限公司 Electric vehicle intelligent charger

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