CN203289085U - Battery charge protection circuit, and charger using battery charge protection circuit - Google Patents
Battery charge protection circuit, and charger using battery charge protection circuit Download PDFInfo
- Publication number
- CN203289085U CN203289085U CN2013202517140U CN201320251714U CN203289085U CN 203289085 U CN203289085 U CN 203289085U CN 2013202517140 U CN2013202517140 U CN 2013202517140U CN 201320251714 U CN201320251714 U CN 201320251714U CN 203289085 U CN203289085 U CN 203289085U
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a battery charge protection circuit, and a charger using the battery charge protection circuit. The battery charge protection circuit comprises an output detection unit, an electric switch unit and a switch control unit, wherein the switch control unit is arranged on the negative output electrode of a charge output circuit, and a first operational amplifier of the output detection unit is used for detecting a voltage difference between the positive output electrode and the negative output electrode of the charge output circuit, thus controlling the switch control unit to control the opening or closing of a charge loop; and the electric switch unit is used for re-conducting the charge loop in case of eliminating reverse connection or short circuit. The battery charge protection circuit, and the charger using the battery charge protection circuit disclosed by the utility model are capable of realizing reverse-connection and short-circuit protection, and have the advantage of high stability.
Description
Technical field
The utility model relates to the battery charger field, particularly the charge protector used of a kind of lead-acid battery and the charger that uses this charge protector.
Background technology
Lead-acid battery is that a kind of electrode is mainly made by lead and oxide thereof, and electrolyte is the storage battery of sulfuric acid solution.It mainly is used in the main equipments such as solar energy system, communication apparatus, electric locomotive.Lead-acid battery needs it is charged to reuse after use.Cause battery failure in when charging due to reversal connection or charger short circuit in order to ensure lead-acid battery, therefore be necessary to arrange reverse-connection protection circuit and short-circuit protection circuit in charger.Yet the protective circuit that existing charger mainly adopts field effect transistor or triode to form.For example; Granted publication day is that the Granted publication number on April 3rd, 2013 has disclosed a kind of electric motor car rechargeable battery reverse-connection protection circuit for the Chinese utility model patent of CN202856325U; this reverse-connection protection circuit comprises the protective circuit that is comprised of a plurality of resistance, field effect transistor and triode; yet; field effect transistor is the device that very easily lost efficacy, and this just makes this reverse-connection protection circuit less stable.
The utility model content
In view of this, the charger that is necessary to provide the high charge protector of battery of a kind of stability and uses this charge protector.
one of technical scheme that the utility model provides is: a kind of charge protector of battery, comprise the charging output circuit, electric switch unit and charge protector, described charge protector comprises output detections unit and switch control unit, wherein the output detections unit comprises the first operational amplifier, the second operational amplifier, the 3rd operational amplifier and four-operational amplifier, the backward end of described the first operational amplifier is connected with the output negative pole of charging output circuit unit, in-phase end is connected with a minute pressure side that is arranged on the electric resistance partial pressure unit between charging output circuit output both positive and negative polarity, the unit output is connected with the in-phase end of the second operational amplifier, and pass through capacity earth, the anti-phase termination reference voltage of described the second operational amplifier, output is connected with the end of oppisite phase of four-operational amplifier by the counnter attack diode, while ground connection, the end of oppisite phase of described the 3rd operational amplifier connects the charging output negative pole and passes through capacity earth, homophase termination reference voltage, output is connected with the end of oppisite phase of described four-operational amplifier by the counnter attack diode, the in-phase end of described four-operational amplifier connects reference voltage, connect simultaneously the electric switch unit, described electric switch unit provides the state switching signal for switch control unit, the output of described four-operational amplifier is connected with the input of switch control unit, while ground connection, described switch control unit be arranged on the charging output circuit charge circuit on, be used for controlling conducting or the shutoff of charge circuit.
two of the technical scheme that the utility model provides is: a kind of battery charger, comprise body and drive circuit, described drive circuit comprises the charging output circuit, electric switch unit and charge protector, described charge protector comprises output detections unit and switch control unit, wherein the output detections unit comprises the first operational amplifier, the second operational amplifier, the 3rd operational amplifier and four-operational amplifier, the backward end of described the first operational amplifier is connected with the output negative pole of charging output circuit unit, in-phase end is connected with a minute pressure side that is arranged on the electric resistance partial pressure unit between charging output circuit output both positive and negative polarity, the unit output is connected with the in-phase end of the second operational amplifier, and pass through capacity earth, the anti-phase termination reference voltage of described the second operational amplifier, output is connected with the end of oppisite phase of four-operational amplifier by the counnter attack diode, while ground connection, the end of oppisite phase of described the 3rd operational amplifier connects the charging output negative pole and passes through capacity earth, homophase termination reference voltage, output is connected with the end of oppisite phase of described four-operational amplifier by the counnter attack diode, the in-phase end of described four-operational amplifier connects reference voltage, connect simultaneously the electric switch unit, described electric switch unit provides the state switching signal for switch control unit, the output of described four-operational amplifier is connected with the input of switch control unit, while ground connection, described switch control unit be arranged on the charging output circuit charge circuit on, be used for controlling conducting or the shutoff of charge circuit.
compared with prior art, the charge protector of battery that the utility model provides and adopt the battery charger of this charge protector of battery to adopt mainly switch control module between the output detections module that is formed by a plurality of operational amplifiers and the output both positive and negative polarity that is arranged on the output circuit that charges, detect the voltage difference of charging output circuit output by the output detections module, when charging output both positive and negative polarity reversal connection or short circuit, the output detections module can be exported a low level, make ON-OFF control circuit turn-off, thereby charge circuit disconnects, thereby avoided the inefficacy of battery because of reversal connection or short circuit photograph.This circuit also is provided with the electric switch unit,, so that get rid of while charging output reversal connection or short circuit, makes the charge circuit conducting.This main circuit will adopt operational amplifier to form protective circuit, and the device performance of operational amplifier is comparatively stable, has avoided using field effect transistor of the prior art, thereby has improved the stability of this charge protector of battery.
Description of drawings
Accompanying drawing 1 is the circuit diagram of charge protector of battery shown in the first embodiment of the present utility model.
Embodiment
Now with embodiment, the utility model is further described by reference to the accompanying drawings.
Accompanying drawing 1 is the circuit diagram of the utility model charge protector of battery the first embodiment, and this charge protector of battery 100 comprises charging output circuit 10, charge protector 20, electric switch unit 30 and switching power circuit 40.Described charge protector 20 is arranged on the charge circuit of charging output circuit,, for detection of the voltage difference between the output cathode B+ negative pole B-of charging output circuit 10, controls the turn-on and turn-off of charge circuit by this voltage difference.Described electric switch unit 30 is arranged on the control end of charge protector 20, is used to charge protector 20 that Continuity signal is provided.Described switching power circuit 40 converts civil power in charge protector reference voltage V CC.
Please refer to Fig. 1, described charging output circuit 10 comprises transformer T2 and charging output rectifier bridge, and described transformer is provided with main winding, inferior winding and the first auxiliary winding, and described main winding connects civil power, and described winding connects the input of charging output rectifier bridge.The output of described charging output rectifier bridge connects respectively the negative pole of the controllable silicon T1 of charging output cathode B+ and electric switch unit.This charge protector of battery also comprises the first rectifier bridge, and described the first auxiliary winding is connected with the input of the first rectifier bridge.
Please refer to Fig. 1; the input of described switching power circuit 40 is connected with the output of described the first rectifier bridge; described switching power circuit 40 passes through the attenuator circuit step-down with the voltage of the transformer T2 of described charging output circuit the first auxiliary winding output, thereby exports a reference voltage V CC for charge protector work.
Please refer to Fig. 1, described charge protector 20 comprises output detections unit 21 and switch control unit 22.wherein output detections unit 21 comprises the first operational amplifier U3A, the second operational amplifier U1C, the 3rd operational amplifier U1B and four-operational amplifier U1D, the backward end of described the first operational amplifier U3A is connected with the output negative pole B-of charging output circuit 10, in-phase end is connected with minute pressure side of the electric resistance partial pressure unit that the resistance R 4 that is arranged between charging output circuit 10 output cathode B+ negative pole B-is connected with R5, output is connected with the in-phase end of the second operational amplifier U1C, and by capacitor C 3 ground connection, the anti-phase termination reference voltage V CC of described the second operational amplifier U1C, output is connected with the end of oppisite phase of four-operational amplifier U1D by counnter attack diode D16, while ground connection, the end of oppisite phase of described the 3rd operational amplifier U1B connects charging output negative pole B-and passes through capacitor C 4 ground connection, homophase termination reference voltage V CC, output is connected with the end of oppisite phase of described four-operational amplifier U1D by counnter attack diode D15, the in-phase end of described four-operational amplifier U1D connects reference voltage, connect simultaneously the electric switch unit, the output of described four-operational amplifier U1D is connected with the input of switch control unit 22, while ground connection, described switch control unit 22 is arranged on charging output circuit 10 charge circuits, thereby control the turn-on and turn-off of charge circuit.
described switch control unit 22 comprises the first triode Q2, the second triode Q1 and counnter attack diode D14, described the first triode Q2 is NPN type triode, the second triode Q1 is the positive-negative-positive triode, the base stage of described the first triode Q2 is connected with the four-operational amplifier U1D output of described output detections unit 21, collector electrode is connected with the base stage of the second triode Q1, the grounded emitter of the first triode Q2, the output cathode B+ of described charging output circuit 10 is connected with the emitter of the second triode Q1 by described counnter attack diode D14, the collector electrode of described the second triode Q1 connects the control end of the controllable silicon T1 of electric switch unit 30, the positive pole of described controllable silicon T1 is connected with the output negative pole B-of charging output circuit 10, the negative pole of described controllable silicon T1 with the output negative pole of charging output rectifier bridge be connected.
please refer to Fig. 1, described electric switch unit 30 comprises the 5th operational amplifier U1A, the 3rd triode Q3 and controllable silicon T1, the homophase termination reference voltage V CC of described the 5th operational amplifier U1A, while ground connection, end of oppisite phase is connected with the output cathode of the first rectifier bridge, the output of described the 5th operational amplifier U1A is connected with the base stage of the 3rd triode Q3, the emitter of the 3rd triode Q3 connects the end of oppisite phase of four-operational amplifier U1D by capacitor C 2, while ground connection, collector electrode is connected with the in-phase end of four-operational amplifier U1D, this just makes the 3rd triode Q3 and capacitor C 2 form oscillation circuit, be used to controllable silicon T1 that conducting voltage is provided.
During work, when the charging output cathode B+ of output circuit 10 and negative pole B-reversal connection, the end of oppisite phase voltage of the first operational amplifier U3A is near battery both end voltage V, and in-phase end voltage is starkly lower than end of oppisite phase, thereby the output output low level of the first operational amplifier U3A, the in-phase end of the second operational amplifier U1C are low level.At this moment, the end of oppisite phase voltage of the second operational amplifier U1C is greater than in-phase end, thus the output output low level of the second operational amplifier U1C, diode D16 cut-off.Due to the homophase termination charging output negative pole B-of the 3rd operational amplifier U1B, this moment, B-voltage was positive voltage+V; The in-phase end of the 3rd operational amplifier U1B connects reference voltage 6.4V, can obtain thus the in-phase end voltage of the 3rd operational amplifier U1B greater than end of oppisite phase, thus the D15 conducting, thus the end of oppisite phase input high level of four-operational amplifier U1D.The in-phase end voltage of four-operational amplifier U1D after resistance R 35 dividing potential drops less than end of oppisite phase voltage, thereby the output output low level of four-operational amplifier U1D, this just makes the first triode Q2 and the second triode Q1 cut-off of switch control module, thereby controllable silicon T1 cut-off, the loop that forms between battery and charger disconnects.
When between the charging output cathode B+ of output circuit 10 and negative pole B-during short circuit, between output cathode B+ and negative pole B-, voltage equates, thus the output output low level of the first operational amplifier U3A, and the in-phase end of the second operational amplifier U1C is low level.At this moment, the end of oppisite phase voltage of the second operational amplifier U1C is greater than in-phase end, thus the output output low level of the second operational amplifier U1C, diode D16 cut-off.due to the homophase termination charging output negative pole B-of the 3rd operational amplifier U1B, this moment, B-voltage was V, the homophase termination reference voltage 6.4V of the 3rd operational amplifier U1B, can obtain thus the in-phase end voltage of the 3rd operational amplifier U1B greater than end of oppisite phase, thereby D15 conducting, thereby the end of oppisite phase input high level of four-operational amplifier U1D, the in-phase end voltage of four-operational amplifier U1D is after resistance R 35 dividing potential drops, less than end of oppisite phase voltage, thereby the output output low level of four-operational amplifier U1D, this just makes the first triode Q2 and the second triode Q1 cut-off of switch control module, thereby controllable silicon T1 cut-off, the loop that forms between battery and charger disconnects.
When getting rid of reversal connection or short-circuit condition, the energizing signal that oscillation circuit by the electric switch unit produces is given four-operational amplifier U1D, make four-operational amplifier U1D output output high level, thereby with the first triode Q2 of switch control unit 22 and the second triode Q1 conducting, to such an extent as to trigger the controllable silicon T1 conducting of electric switch unit 30.
in sum, the charge protector of battery that the utility model provides and adopt the battery charger of this charge protector of battery to adopt mainly switch control module between the output detections module that is formed by a plurality of operational amplifiers and the output both positive and negative polarity that is arranged on the output circuit that charges, detect the voltage difference of charging output circuit output by the output detections module, when charging output both positive and negative polarity reversal connection or short circuit, the output detections module can be exported a low level, make ON-OFF control circuit turn-off, thereby charge circuit disconnects, thereby avoided the inefficacy of battery because of reversal connection or short circuit photograph.This circuit also is provided with the electric switch unit,, so that get rid of while charging output reversal connection or short circuit, makes the charge circuit conducting.This main circuit will adopt operational amplifier to form protective circuit, and the device performance of operational amplifier is comparatively stable, has avoided using field effect transistor of the prior art, thereby has improved the stability of this charge protector of battery.In addition, the switch control module of this charge protector of battery adopts controllable silicon also can improve the sensitivity of this charge protector as switching device.Further, described switch control module is provided with the control signal module, thereby makes the controllable silicon conducting again after the situation of getting rid of reversal connection and short circuit of can having no progeny in pass.
Although in conjunction with preferred embodiment, specifically show and introduced the utility model; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.
Claims (6)
1. charge protector of battery, comprise the charging output circuit, electric switch unit and charge protector, it is characterized in that: described charge protector comprises output detections unit and switch control unit, wherein the output detections unit comprises the first operational amplifier, the second operational amplifier, the 3rd operational amplifier and four-operational amplifier, the backward end of described the first operational amplifier is connected with the output negative pole of charging output circuit unit, in-phase end is connected with a minute pressure side that is arranged on the electric resistance partial pressure unit between charging output circuit output both positive and negative polarity, output is connected with the in-phase end of the second operational amplifier, and pass through capacity earth, the anti-phase termination reference voltage of described the second operational amplifier, output is connected with the end of oppisite phase of four-operational amplifier by the counnter attack diode, while ground connection, the end of oppisite phase of described the 3rd operational amplifier connects the charging output negative pole and passes through capacity earth, homophase termination reference voltage, output is connected with the end of oppisite phase of described four-operational amplifier by the counnter attack diode, the in-phase end of described four-operational amplifier connects reference voltage, connect simultaneously the electric switch unit, the output of described four-operational amplifier is connected with the input of switch control unit, while ground connection, described switch control unit be arranged on the charging output circuit charge circuit on, be used for controlling unlatching or the shutoff of charge circuit.
2. charge protector of battery according to claim 1, it is characterized in that: described charging output circuit comprises transformer and charging output rectifier bridge, described transformer is provided with main winding, inferior winding and the first auxiliary winding, described main winding connects civil power, and described winding connects the input of charging output rectifier bridge; The output of described charging output rectifier bridge connects respectively the controllable silicon negative pole of charging output cathode and electric switch unit, also comprises the first rectifier bridge, and described the first auxiliary winding is connected with the input of the first rectifier bridge.
3. charge protector of battery according to claim 2; it is characterized in that: also comprise switching power circuit; the input of described switching power circuit is connected with the output of described the first rectifier bridge; described switching power circuit passes through the attenuator circuit step-down with the voltage of the transformer of described charging output circuit the first auxiliary winding output, thereby exports a reference voltage for charge protector work.
4. charge protector of battery according to claim 3, it is characterized in that: described electric switch unit comprises the 5th operational amplifier, the 3rd triode and controllable silicon, the homophase termination reference voltage of described the 5th operational amplifier, while ground connection, end of oppisite phase is connected with the output of the first rectifier bridge, the output of described the 5th operational amplifier is connected with the base stage of the 3rd triode, the emitter of the 3rd triode connects the end of oppisite phase of four-operational amplifier by electric capacity, while ground connection, collector electrode is connected with the in-phase end of four-operational amplifier, this just makes the 3rd triode and electric capacity form oscillation circuit, be used to controllable silicon that cut-in voltage is provided.
5. charge protector of battery according to claim 3, it is characterized in that: described switch control unit comprises the first triode, the second triode and counnter attack diode, described the first triode is NPN type triode, the second triode is the positive-negative-positive triode, the base stage of described the first triode is connected with the four-operational amplifier output of described output detections unit, collector electrode is connected with the base stage of the second triode, the grounded emitter of the first triode, the output cathode of described charging output circuit is connected with the emitter of the second triode by described counnter attack diode, the collector electrode of described the second triode connects the silicon controlled control end of electric switch unit, the anodal output negative pole with the charging output circuit of described silicon controlled is connected, described silicon controlled negative pole is connected with the output negative pole of transformation output circuit.
6. a battery charger, comprise body and drive circuit, it is characterized in that: described drive circuit comprises the described charge protector of battery of employing claim 1 to 5 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202517140U CN203289085U (en) | 2013-05-10 | 2013-05-10 | Battery charge protection circuit, and charger using battery charge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202517140U CN203289085U (en) | 2013-05-10 | 2013-05-10 | Battery charge protection circuit, and charger using battery charge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203289085U true CN203289085U (en) | 2013-11-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202517140U Expired - Lifetime CN203289085U (en) | 2013-05-10 | 2013-05-10 | Battery charge protection circuit, and charger using battery charge protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203289085U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300247A (en) * | 2015-06-05 | 2017-01-04 | 中兴通讯股份有限公司 | Voltage protection circuit and system |
| CN111722127A (en) * | 2020-05-07 | 2020-09-29 | 武汉市蓝电电子股份有限公司 | Reverse connection prevention protection circuit for current line of battery test equipment |
-
2013
- 2013-05-10 CN CN2013202517140U patent/CN203289085U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300247A (en) * | 2015-06-05 | 2017-01-04 | 中兴通讯股份有限公司 | Voltage protection circuit and system |
| CN111722127A (en) * | 2020-05-07 | 2020-09-29 | 武汉市蓝电电子股份有限公司 | Reverse connection prevention protection circuit for current line of battery test equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: XIAMEN HUALIAN ELECTRONIC SCIENCE TECHNOLOGY CO., Free format text: FORMER NAME: XIAMEN NEW ERA ELECTRONIC INDUSTRY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 361000 Fujian city of Xiamen province Tong'an District Hongtang Head Road No. 120 Building No. 15 layer 1-4 Patentee after: XIAMEN HUALIAN ELECTRONICS CO.,LTD. Address before: Siming District of Xiamen City, Fujian province 361000 Qianpu Road No. 502 5 floor Patentee before: XIAMEN NEW ERA ELECTRONICS Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |