CN218449481U - Anti-reverse connection circuit of storage battery charger, charger and storage battery - Google Patents
Anti-reverse connection circuit of storage battery charger, charger and storage battery Download PDFInfo
- Publication number
- CN218449481U CN218449481U CN202221985221.5U CN202221985221U CN218449481U CN 218449481 U CN218449481 U CN 218449481U CN 202221985221 U CN202221985221 U CN 202221985221U CN 218449481 U CN218449481 U CN 218449481U
- Authority
- CN
- China
- Prior art keywords
- charger
- circuit
- battery
- storage battery
- reverse
- 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.)
- Active
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a battery charger prevents reverse connection circuit, charger and battery, battery charger prevents reverse connection circuit includes relay switch, reverse connection detection circuit, control circuit and power supply, and relay switch's movable contact is used for connecting the charger output positive terminal, and relay switch's normally open contact is used for connecting the battery positive terminal; the reverse connection detection circuit comprises a photoelectric coupler and a resistor string, wherein the anode of the photoelectric coupler is connected with the positive end of the storage battery through the resistor string, the cathode of the photoelectric coupler is connected with the negative end of the storage battery, the collector of the photoelectric coupler is connected with a power supply, and the emitter of the photoelectric coupler is connected with the control circuit; the control circuit comprises a triode Q1, a diode D1, a state indicating circuit and the like. The utility model discloses a relay switch, reversal connection detection circuitry and control circuit etc. control charger are normal or stop to battery charging, avoid damaging the battery because of the charger reversal connection.
Description
Technical Field
The utility model relates to a power electronic technology field, specific theory has related to a battery charger prevents reverse connection circuit, charger and battery.
Background
For electronic products or circuits powered by direct current, serious consequences such as part damage and the like can be caused by reverse connection of the power supply polarity; for a battery charging system, once the polarity of a power supply is reversed, the charger and the storage battery may be damaged, even a combustion accident may be caused, and a great loss may be caused.
In the existing anti-reverse connection circuit of the storage battery, a single chip microcomputer is generally selected as an output control end, whether the voltage polarity of the output end of the charging circuit is correct or not and whether the polarity of the storage battery is correct or not are detected through software, and if the voltage polarity is correct, a switch is controlled to be switched on, so that the circuit is switched on, and the storage battery is charged; if not, the control switch is not conducted, the circuit cannot be connected, and no loss is caused. However, the prior art has the following disadvantages: the circuitry is complex and requires the introduction of software control.
In order to solve the above problems, people always seek an ideal technical solution.
Disclosure of Invention
The utility model aims at the not enough of prior art to a circuit, charger and battery are prevented reversing connection by battery charger is provided.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is:
the utility model discloses a first aspect provides a battery charger prevents reverse connection circuit, it includes relay switch, reverse connection detection circuit, control circuit and power supply, the movable contact of relay switch is used for connecting charger output positive terminal, the normally open contact of relay switch is used for connecting the battery positive terminal;
the reverse connection detection circuit comprises a photoelectric coupler and a resistor string, wherein the anode of the photoelectric coupler is connected with the positive end of the storage battery through the resistor string, the cathode of the photoelectric coupler is connected with the negative end of the storage battery, the collector of the photoelectric coupler is connected with the power supply, and the emitter of the photoelectric coupler is connected with the control circuit;
the control circuit comprises a triode Q1, a diode D1 and a state indicating circuit, the diode D1 and the state indicating circuit are connected to two ends of a coil of the relay switch in parallel, a base electrode of the triode Q1 is connected with an emitting electrode of the photoelectric coupler through a resistor, a collector electrode of the triode Q1 is connected with a positive electrode of the diode D1 and one end of the state indicating circuit respectively, the emitting electrode of the triode Q1 is grounded, and a negative electrode of the diode D1 and the other end of the state indicating circuit are connected with the power supply respectively.
The utility model discloses the second aspect provides a charger, it includes the charger main circuit, the charger main circuit sets up charger output positive terminal and charger output negative terminal, still includes foretell battery charger and prevents reverse connection circuit, charger output positive terminal is connected the battery charger prevents reversing connection circuit relay switch's movable contact and power supply, charger output negative terminal is connected the grounding terminal in the battery charger prevents reverse connection circuit.
The utility model discloses the third aspect provides a storage battery, it includes the battery body, the battery body sets up storage battery positive end and battery negative terminal, still includes foretell battery charger and prevents the reverse connection circuit, the storage battery positive end is connected respectively the battery charger prevents reversing connection circuit relay switch's normally open contact and the reverse detection circuitry that connects, the battery negative terminal is connected the earthing terminal among the battery charger prevents the reverse connection circuit
The beneficial effects of the utility model are that:
1) The utility model provides a reverse connection prevention circuit of a storage battery charger, which directly connects the output negative terminal of the charger with the negative terminal of the storage battery, and a relay switch is connected in series with the positive terminal of the storage battery at the output positive terminal of the charger, and the charger is controlled to be normal or stop charging the storage battery by the suction or release of the reverse connection detection circuit and the control circuit driving relay switch, thereby realizing the reverse connection prevention protection function of the storage battery charger, effectively avoiding the occurrence of dangerous situations and improving the stability of a charging system;
2) The reverse connection detection circuit adopts the photoelectric coupler, detects whether the storage battery and the charger are reversely connected according to the input signal of the photoelectric coupler, adjusts the switching state of a triode in the control circuit by utilizing the output signal of the photoelectric coupler, and further drives a relay switch to suck or release, so the utility model has the advantages of simple circuit structure, no need of software to control the relay, and realization of reverse connection prevention protection of the storage battery charger through hardware;
3) A state indicating circuit is arranged in the control circuit, and whether the storage battery is reversely connected with the charger or not is visually displayed through the state of an indicating lamp in the state indicating circuit;
4) The anti-reverse connection circuit of the storage battery charger can be used in the charger and also can be used for the storage battery, and the phenomenon that the battery is damaged due to reverse connection of the battery caused by misoperation is prevented.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a circuit schematic diagram of the anti-reverse connection circuit of the storage battery charger of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
Example 1
As shown in the attached drawings 1 and 2, the anti-reverse connection circuit of the storage battery charger comprises a relay switch K1, a reverse connection detection circuit, a control circuit and a power supply, wherein a movable contact of the relay switch K1 is used for connecting a positive output terminal of the charger, and a normally open contact of the relay switch K1 is used for connecting a positive terminal of the storage battery;
the reverse connection detection circuit comprises a photoelectric coupler U2 and a resistor string, the anode of the photoelectric coupler U2 is connected with the positive end of the storage battery through the resistor string, the cathode of the photoelectric coupler U2 is connected with the negative end of the storage battery, the collector of the photoelectric coupler U2 is connected with the power supply, and the emitter of the photoelectric coupler U2 is connected with the control circuit;
the control circuit comprises a triode Q1, a diode D1 and a state indicating circuit, the diode D1 and the state indicating circuit are connected to two ends of a coil of the relay switch in parallel, a base of the triode Q1 is connected with an emitting electrode of the photoelectric coupler through a resistor R8, a collector of the triode Q1 is connected with a positive electrode of the diode D1 and one end of the state indicating circuit respectively, the emitting electrode of the triode Q1 is grounded, and a negative electrode of the diode D1 and the other end of the state indicating circuit are connected with the power supply respectively.
The normally closed contact of the relay switch is suspended, and the resistor string comprises a resistor R1 and a resistor R2 which are connected in series.
The battery charger anti-reverse connection protection circuit enables the output negative end of the charger to be directly connected with the negative end of the battery, a relay switch K1 is connected in series between the output positive end of the charger and the positive end of the battery, a photoelectric coupler is arranged between the positive electrode and the negative electrode of the battery, and the photoelectric coupler is used for isolating and detecting the polarity of the battery; when the storage battery is reversely connected, the relay switch K1 does not act (is in a release state or a closing state), and the rechargeable battery outputs no voltage and cannot charge the storage battery. When the storage battery is connected positively, the relay switch K1 acts (is in a pull-in state), the charger can normally charge the storage battery, and the state indicator lamp is on; therefore, the utility model discloses need not software and controlling the relay, can realize opening and closing of relay through hardware, and then realize the anti-protection of connecing of battery charger.
It can be understood that when the reverse connection detection circuit detects the polarity of the storage battery: when the current is positively connected, the photoelectric coupler U2 is positively conducted, and the internal light is transmitted to the triode in the photoelectric coupler U2 to conduct the triode in the photoelectric coupler U2; when the photoelectric coupler U2 is reversely connected, the inside of the photoelectric coupler U2 is cut off in a reverse direction and does not shine, and a triode in the photoelectric coupler is not conducted; therefore, the emitter output signal of the photoelectric coupler U2 in the reverse connection detection circuit can reflect whether the storage battery is reversely connected with the charger or not;
when the control circuit drives the relay switch K1 to act:
when the charging circuit is positively connected, the base electrode of the triode Q1 of the triode conducting control circuit in the photoelectric coupler U2 is in a high level, the collector electrode and the emitter electrode of the triode Q1 are conducted, at the moment, the coil of the relay switch K1 is electrified to enable the relay switch K1 to be attracted, the output positive end of the charger is connected with the positive end of the storage battery, and the charger normally charges the storage battery;
when the circuit is reversely connected, the triode in the photoelectric coupler U2 is not conducted, the base electrode of the triode Q1 of the control circuit receives low level, the collector electrode and the emitter electrode of the triode Q1 are not conducted, the coil of the relay switch K1 is not electrified, so that the relay switch K1 is released, and the charger cannot charge the storage battery.
As shown in fig. 2, the power supply is connected in parallel between the output positive terminal and the output negative terminal of the charger, and is configured to supply power to the relay switch K1 and the state indicating circuit; the BUCK circuit specifically comprises a BUCK chip U1, an inductor L1, a capacitor C3, a resistor R4, a resistor R6 and the like, wherein the BUCK chip U1 is provided with an IN pin for connecting a positive output terminal of a charger, and a GND pin for connecting a negative output terminal of the charger;
the IN pin of the voltage reduction chip U1 is also connected with the RON pin of the voltage reduction chip through a resistor R3 and a resistor R4 which are connected IN series, and the EN pin of the voltage reduction chip U1 is connected with the positive output end of the charger through a resistor R6;
the BS pin of the voltage reduction chip U1 is connected with the LX pin of the voltage reduction chip through the capacitor C1, the LX pin of the voltage reduction chip U1 is also connected with one end of the inductor L1, and the other end of the inductor L1 is respectively connected with the anode of the diode D2, one end of the capacitor C3 and the control circuit;
the other end of the inductor L1 is also respectively connected with the anode of the diode D2 and one end of the capacitor C3, the cathode of the diode D2 is connected with the VCC pin of the voltage reduction chip U1, and the other end of the capacitor C3 is connected with the FB pin of the voltage reduction chip U1.
Specifically, the type of the voltage reduction chip U1 is SY8502FCC, the input voltage range is wide and is DC12V-DC72V, and the input voltage is reduced to DC12V, so that power is supplied to the relay switch K1 and the state indicating circuit; it should be noted that, a specific process of the power supply converting the input voltage to DC12V is prior art, and is not described herein again.
Further, the state indicating circuit comprises a light emitting diode LED1 and a resistor R5, the negative electrode of the light emitting diode LED1 is connected with the collector electrode of a triode Q1 in the control circuit through the resistor R5, and the positive electrode of the light emitting diode LED1 is connected with the power supply;
specifically, emitting diode LED1 is green pilot lamp, and green pilot lamp is by going out to bright, can indicate whether the user's charger connects the battery correctly.
Example 2
On the basis of embodiment 1, this embodiment provides a specific implementation of a charger, where the charger includes a charger main circuit, the charger main circuit is provided with a charger output positive terminal and a charger output negative terminal, and the charger further includes an anti-reverse-connection circuit of the battery charger in embodiment 1, where the charger output positive terminal is connected to a moving contact of a relay switch and a power supply in the anti-reverse-connection circuit of the battery charger, and the charger output negative terminal is connected to a ground terminal in the anti-reverse-connection circuit of the battery charger.
As shown in fig. 1 and fig. 2, the charger output positive terminal of the charger main circuit is respectively connected to the relay switch K1 and the power supply in the anti-reverse connection circuit of the storage battery charger, and the charger output negative terminal of the charger main circuit is respectively connected to the photoelectric coupler and the resistor string of the anti-reverse connection detection circuit, the triode Q1 and the state indication circuit in the control circuit, and the voltage reduction chip U1 in the power supply;
specifically, the output negative terminal of the charger is connected with the cathode of the photoelectric coupler U2, and is also connected with the anode of the photoelectric coupler U2 and the resistor string through a capacitor C5;
the output negative end of the charger is respectively connected with the negative electrode of the diode D1 and the positive electrode of the light-emitting diode LED1 through a capacitor C4, and is also respectively connected with the base electrode of the triode Q1 through a resistor R10 and a capacitor C10, and the resistor R10 is connected with the capacitor C10 in parallel;
the charger output negative terminal is connected through electric capacity C2 the IN pin of step-down chip U1 connects through resistance R9 the EN pin of step-down chip U1 connects through electric capacity C7 the VCC pin of step-down chip U1 connects through resistance R11 the FB pin of step-down chip U1.
It can be understood that, in the embodiment, the anti-reverse-connection circuit of the storage battery charger is arranged in the charger, and when the storage battery charger is reversely connected, the charger is controlled from the charger side to normally or stop charging the storage battery, so that the anti-reverse-connection protection of the storage battery charger is realized.
Example 3
On the basis of embodiment 1, this embodiment provides a specific implementation mode of battery, the battery includes the battery body, the battery body sets up battery positive terminal and battery negative terminal, still includes the battery charger anti-reverse connection circuit in embodiment 1, the battery positive terminal is connected respectively the battery charger prevents reverse connection detection circuit that the normally open contact of reverse connection circuit relay switch with, the battery negative terminal is connected the grounding terminal in the battery charger prevents reverse connection circuit.
As shown in fig. 1 and fig. 2, the positive end of the storage battery body is respectively connected to the relay switch K1 and the reverse connection detection circuit in the reverse connection prevention circuit of the storage battery charger, and the negative end of the storage battery body is respectively connected to the photoelectric coupler and the resistor string of the reverse connection detection circuit, the triode Q1 and the state indication circuit in the control circuit, and the voltage reduction chip U1 in the power supply;
specifically, the positive end of the storage battery is connected with the normally open contact of the relay switch K1 and the resistor string of the reverse connection detection circuit respectively.
It can be understood that, in the embodiment, the anti-reverse-connection circuit of the storage battery charger is arranged in the storage battery, and when the storage battery charger is reversely connected, the charger is controlled from the side of the storage battery to normally or stop charging the storage battery, so that the anti-reverse-connection protection of the storage battery charger is realized.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: modifications can still be made to the embodiments of the invention or equivalents may be substituted for some of the features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (5)
1. The utility model provides a battery charger prevents reverse connection circuit which characterized in that: the charger comprises a relay switch, a reverse connection detection circuit, a control circuit and a power supply, wherein a movable contact of the relay switch is used for connecting a positive output terminal of the charger, and a normally open contact of the relay switch is used for connecting a positive terminal of a storage battery;
the reverse connection detection circuit comprises a photoelectric coupler and a resistor string, wherein the anode of the photoelectric coupler is connected with the positive end of the storage battery through the resistor string, the cathode of the photoelectric coupler is connected with the negative end of the storage battery, the collector of the photoelectric coupler is connected with the power supply, and the emitter of the photoelectric coupler is connected with the control circuit;
the control circuit comprises a triode Q1, a diode D1 and a state indicating circuit, the diode D1 and the state indicating circuit are connected to two ends of a coil of the relay switch in parallel, a base electrode of the triode Q1 is connected with an emitting electrode of the photoelectric coupler through a resistor, a collector electrode of the triode Q1 is connected with a positive electrode of the diode D1 and one end of the state indicating circuit respectively, the emitting electrode of the triode Q1 is grounded, and a negative electrode of the diode D1 and the other end of the state indicating circuit are connected with the power supply respectively.
2. A battery charger anti-reverse connection circuit as claimed in claim 1, wherein: the power supply comprises a voltage reduction chip, an inductor L1, a capacitor C3, a resistor R4 and a resistor R6, wherein an IN pin of the voltage reduction chip is used for connecting the output positive end of the charger, and a GND pin of the voltage reduction chip is used for connecting the output negative end of the charger;
the IN pin of the voltage reduction chip is also connected with the RON pin of the voltage reduction chip through a resistor R3 and a resistor R4 which are connected IN series, and the EN pin of the voltage reduction chip is connected with the positive output end of the charger through a resistor R6;
the BS pin of the voltage reduction chip is connected with the LX pin of the voltage reduction chip through the capacitor C1, the LX pin of the voltage reduction chip is also connected with one end of the inductor L1, and the other end of the inductor L1 is respectively connected with the anode of the diode D2, one end of the capacitor C3 and the control circuit;
the negative pole of diode D2 is connected the VCC pin of step-down chip, the FB pin of step-down chip is connected to the other end of electric capacity C3.
3. A battery charger anti-reverse connection circuit as claimed in claim 1, wherein: the state indicating circuit comprises a light emitting diode LED1 and a resistor R5, the negative electrode of the light emitting diode LED1 is connected with the collector electrode of a triode Q1 in the control circuit through the resistor R5, and the positive electrode of the light emitting diode LED1 is connected with the power supply.
4. The utility model provides a charger, includes the charger main circuit, the charger main circuit sets up charger output positive terminal and charger output negative terminal, its characterized in that: the battery charger anti-reverse-connection circuit comprises a battery charger anti-reverse-connection circuit according to any one of claims 1 to 3, wherein the positive output end of the charger is connected with a movable contact of a relay switch of the battery charger anti-reverse-connection circuit and a power supply, and the negative output end of the charger is connected with a grounding end in the battery charger anti-reverse-connection circuit.
5. The utility model provides a storage battery, includes battery body, battery body sets up positive end of battery and battery negative end, its characterized in that: the anti-reverse-connection circuit of the storage battery charger is further included, the positive end of the storage battery is respectively connected with a normally open contact of a relay switch in the anti-reverse-connection circuit of the storage battery charger, and the negative end of the storage battery is connected with the grounding end in the anti-reverse-connection circuit of the storage battery charger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221985221.5U CN218449481U (en) | 2022-07-29 | 2022-07-29 | Anti-reverse connection circuit of storage battery charger, charger and storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221985221.5U CN218449481U (en) | 2022-07-29 | 2022-07-29 | Anti-reverse connection circuit of storage battery charger, charger and storage battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218449481U true CN218449481U (en) | 2023-02-03 |
Family
ID=85092071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221985221.5U Active CN218449481U (en) | 2022-07-29 | 2022-07-29 | Anti-reverse connection circuit of storage battery charger, charger and storage battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218449481U (en) |
-
2022
- 2022-07-29 CN CN202221985221.5U patent/CN218449481U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101908771A (en) | Circuit for realizing fast and slow charging in linear circuits and charging control method | |
| EP3096430B9 (en) | Electric vehicle and power supply circuit for a vehicle control device with alternating current charging thereof | |
| CN104410139A (en) | Automatic power off circuit and automatic power off device for full charging of storage battery of accumulator car | |
| WO2017020782A1 (en) | Battery charging and discharging control circuit and battery charging and discharging system | |
| CN103321814A (en) | Emergency ignition device for vehicle | |
| CN201813158U (en) | Circuit for charging battery jar and preventing anode and cathode from reverse connection | |
| CN218449481U (en) | Anti-reverse connection circuit of storage battery charger, charger and storage battery | |
| CN104242252A (en) | Battery over-discharge protecting circuit | |
| CN104065043B (en) | Battery under-voltage protection and display circuit | |
| CN214255774U (en) | Battery charging dormancy control circuit | |
| CN201616693U (en) | Intelligent power supply device | |
| CN211456722U (en) | Multi-stage protection charger charging auxiliary circuit | |
| CN213838196U (en) | Door closer control circuit | |
| CN108448681A (en) | A kind of online method for detecting of the charger of battery management system | |
| CN211530748U (en) | Double-direct-current power supply series-parallel switching circuit and charging system | |
| CN210041353U (en) | Charger circuit | |
| CN103917003B (en) | A kind of emergency light and emergency light control circuit | |
| CN202008076U (en) | Solar emergency lamp | |
| CN219843429U (en) | Intelligent automatic power-off charging control device | |
| CN204391863U (en) | Battery of battery-driven truck is full of automatic power-off circuit and auto-power-off device | |
| CN100547877C (en) | The automatic stop function control circuit of positive and negative combined pulse charge machine | |
| CN215042116U (en) | Novel hard switch power battery system for AGV | |
| CN104022554A (en) | Battery charging and discharging circuit based on AT89C2051 single chip microcomputer and UC3842 chip | |
| CN2487143Y (en) | Intelligent Nickel-cadmium (Nickel-hydrogen) cell charger | |
| CN203057186U (en) | Automatic charging router |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |