CN220107635U - Circuit for preventing reverse connection of positive electrode and negative electrode of battery - Google Patents
Circuit for preventing reverse connection of positive electrode and negative electrode of battery Download PDFInfo
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- CN220107635U CN220107635U CN202321684706.5U CN202321684706U CN220107635U CN 220107635 U CN220107635 U CN 220107635U CN 202321684706 U CN202321684706 U CN 202321684706U CN 220107635 U CN220107635 U CN 220107635U
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to the technical field of battery charging protection circuits, and discloses a circuit which is simpler in circuit design and higher in reliability and is used for preventing the reverse connection of the positive electrode and the negative electrode of a battery, and the circuit comprises a power supply primary circuit (101), a secondary rectifying, filtering and voltage stabilizing circuit (102), a main charging switch circuit (103) and a switch circuit (104), wherein the power supply primary circuit (101) is used for receiving a voltage signal output by a mains supply side and carrying out rectification and voltage reduction treatment on the voltage signal, when the positive electrode and the negative electrode of a load are reversely connected, a current signal flows through and is controlled to be conducted at the input end of the switch circuit (104), the potential of the power supply primary circuit (101) is pulled down to a low level, and the power supply primary circuit (101) does not work, so that a charging loop does not have current output.
Description
Technical Field
The utility model relates to the technical field of battery charging protection circuits, in particular to a circuit for preventing reverse connection of positive and negative poles of a battery.
Background
Battery chargers are more common charging devices in high frequency power technology. At present, most battery chargers only output with two common cores, positive and negative electrodes have no anti-reverse connection function, if a user carelessly connects the batteries reversely, the batteries and the chargers can be damaged to different degrees, therefore, most battery chargers are structurally added with the function of preventing the positive and negative connection of the dead batteries or are provided with an MCU to detect whether the interfaces of the batteries connected with the output of the charger are reversely connected and processed, but by adopting the circuit structure mode, the manufacturing cost of the charger can be increased, the popularization of products is not facilitated, and the circuit design is complex.
Therefore, how to simplify the design layout of the charging circuit and solve the faults caused by the reverse connection of the positive and negative poles of the battery is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The utility model aims to solve the technical problems that aiming at the defects that most chargers in the prior art are structurally added with the function of preventing the positive and negative connection of a battery or added with an MCU to detect whether an interface of a battery connected with the output of the charger is reversely connected and processed, the circuit structure mode is adopted, the manufacturing cost of the charger is increased, the popularization of products is not facilitated, and the circuit design is complex, the circuit for preventing the positive and negative reverse connection of the battery is simpler in circuit design and higher in reliability.
The technical scheme adopted for solving the technical problems is as follows: a circuit for preventing reverse connection of a battery positive electrode and a battery negative electrode is provided with:
the power supply primary circuit is arranged in the reverse connection circuit, and the input end of the power supply primary circuit is used for receiving a voltage signal output by the mains supply side and rectifying and reducing the voltage signal;
the input end of the secondary rectifying, filtering and voltage stabilizing circuit is coupled with the output end of the primary circuit of the power supply and is used for receiving the voltage signal after the voltage is reduced, and then filtering and voltage stabilizing treatment is carried out on the voltage signal to obtain a charging signal;
the input end of the main charging switch circuit is connected with the output end of the secondary rectifying, filtering and voltage stabilizing circuit and is used for receiving the charging signal so as to charge a load to be charged;
the input end of the switching circuit is respectively connected with one output end of the power supply primary circuit and the output end of the main charging switching circuit, and when the positive electrode and the negative electrode of the load are correctly connected, the switching circuit is cut off;
when the positive electrode and the negative electrode of the load are reversely connected, a current signal flows through the input end of the switch circuit and is controlled to be conducted, the potential of the primary circuit of the power supply is pulled down to a low level, and the primary circuit of the power supply does not work, so that the charging loop does not output current.
In some embodiments, the main charging switch circuit includes at least a first switch tube and a second switch tube,
the drain electrode of the first switching tube is connected with the output end of the secondary rectifying, filtering and voltage stabilizing circuit,
the drain electrode of the second switching tube is connected with the positive electrode of the load and the input end of the switching circuit,
the source electrode of the first switching tube is connected with the source electrode of the second switching tube,
and the grid electrode of the first switching tube and the grid electrode of the second switching tube are connected with a driving signal end.
In some embodiments, the main charge switch circuit further comprises a voltage divider circuit,
one end of the voltage dividing circuit is connected with the driving signal end,
the other end of the voltage dividing circuit is connected with the grid electrode of the first switching tube and the grid electrode of the second switching tube,
and the third end of the voltage dividing circuit is connected with the common end.
In some implementations, the voltage divider circuit includes a seventh resistor, a fifteenth resistor and a fifth diode,
one end of the seventh resistor is connected with the driving signal end,
the other end of the seventh resistor is respectively connected with one end of the fifteenth resistor, the grid electrode of the first switching tube and the grid electrode of the second switching tube,
the other end of the fifteenth resistor is connected with the anode of the fifth diode,
and the cathode of the fifth diode is connected with the common terminal.
In some embodiments, the main charge switch circuit further comprises a fourth diode and a tenth resistor,
the cathode of the fourth diode is connected with the anode of the load,
an anode of the fourth diode is connected with one end of the tenth resistor,
the other end of the tenth resistor is connected with an output signal end of the switching circuit.
In some embodiments, the switching circuit includes at least a photo coupler and a thyristor,
a signal end of the photoelectric coupler is connected with the positive electrode of the load,
the anode of the controllable silicon and the other signal end of the photoelectric coupler are connected with an output end of the power supply primary circuit,
the control end of the controllable silicon is connected with a signal output end of the photoelectric coupler,
and the cathode of the controllable silicon is connected with the common terminal.
In some embodiments, the power supply primary circuit includes at least a PWM controller,
the power input end of the PWM controller is connected with the anode of the controllable silicon and the other signal end of the photoelectric coupler,
when the positive electrode and the negative electrode of the load are reversely connected, a current signal flows through a signal end of the photoelectric coupler and is controlled to be conducted, so that the silicon controlled rectifier is controlled to be conducted, the potential of a power input end of the PWM controller is pulled down to a low level, the power primary circuit does not work, and the grid electrodes of the first switching tube and the second switching tube lose driving level, so that a charging loop does not have current output.
In some embodiments, the first switching tube and the second switching tube are selected as P-channel MOS tubes.
The utility model discloses a circuit for preventing reverse connection of a battery anode and a cathode, which comprises a power supply primary circuit, a secondary rectifying and filtering voltage stabilizing circuit, a main charging switch circuit and a switch circuit, wherein the power supply primary circuit is used for receiving a voltage signal output by a mains supply side and rectifying and reducing the voltage signal, when the anode and the cathode of a load are reversely connected, a current signal flows through an input end of the switch circuit and is controlled to be conducted, the potential of the power supply primary circuit is pulled down to a low level, and the power supply primary circuit does not work, so that a charging loop does not output current. Compared with the prior art, through setting up main charge switch circuit and switch circuit cooperation, when the positive negative pole of load is reverse, switch circuit switches on to control power primary circuit turns into from switching on to cut off, stops outputting the charging current signal, provides multiple protection circuit when being reverse for battery positive negative polarity, and then improves battery and charger life, can effectively solve among the prior art most chargers all from the structure increase prevent that the foolproof battery is the function of reverse, perhaps increase MCU and go to discern and handle, but adopt foretell circuit structure mode, can increase the manufacturing cost's of charger problem.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic circuit diagram of an embodiment of a circuit for preventing reverse connection of a battery anode and a battery cathode;
FIG. 2 is a schematic circuit diagram of an embodiment of a power supply primary circuit and a switching circuit according to the present utility model;
fig. 3 is a schematic circuit diagram of an embodiment of a secondary rectifying, filtering and voltage stabilizing circuit and a primary charging switch circuit provided by the present utility model.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of the battery positive and negative reverse connection preventing circuit 10 according to the present utility model, the battery positive and negative reverse connection preventing circuit includes a power source primary circuit 101, a secondary rectifying and filtering voltage stabilizing circuit 102, a primary charging switch circuit 103 and a switch circuit 104.
The primary power supply circuit 101 is configured to receive an ac voltage signal input from a mains supply side, and rectify and step down the voltage signal;
the device comprises an AC input, an EMI filter, a rectifying filter, a PWM switch control circuit and a transformer T1;
the AC input is connected with the 220V commercial power side, and then the input voltage signal is subjected to EMI filtering and rectification filtering, and the voltage signal is coupled to the secondary rectification filtering voltage stabilizing circuit 102 through the PWM switch control circuit and the transformer T1.
The secondary rectifying, filtering and voltage stabilizing circuit 102 receives a voltage signal output by the secondary side of the transformer T1, and then carries out secondary rectifying and filtering processing on the voltage signal so as to output a charging signal which can be used for charging a load (which can be a lead-acid storage battery);
the main charging switch circuit 103 is configured to receive the charging signal that is output by the secondary rectifying, filtering and voltage stabilizing circuit 102 and is used to charge a load (which may be a lead-acid battery);
under the condition that the anode and the cathode of the lead-acid storage battery are normally connected, the voltage division circuit forwards reaches the ground through a fifth diode D5 to enable a switching tube (corresponding to Q1 and Q2) in the main charging switching circuit 103 to be conducted, and at the moment, a tenth resistor R10 and a photoelectric coupler (corresponding to PC 2A) of the switching circuit 104 do not work due to the reverse direction of a fourth diode D4, so that the main circuit is normally charged;
the switch circuit 104 is used for controlling the switch state of the charging current output by the primary circuit 101;
when the positive electrode and the negative electrode of the lead-acid storage battery are reversely connected, the photoelectric coupler (corresponding to PC 2A) of the switch circuit 104 and the fourth diode D4 obtain forward voltage drop, and current flows from bottom to top through the tenth resistor R10 through the circuit;
at this time, the light emitting diode in the photo coupler (corresponding to PC 2A) is turned on, the electric signal is transmitted to the photo coupler (corresponding to PC 2B) so that the photo coupler (corresponding to PC 2B) has a current signal flowing through, the resistance value is very small when it is turned on, the voltage of VDD of the 1 pin of the PWM controller U1 in the primary power supply circuit 101 is sent to the G pole of the thyristor U2 in the switch circuit 104 through the photo coupler (corresponding to PC 2B), when the G pole of the thyristor U2 is higher than the starting threshold value of 0.8V, the voltage of the 1 pin of the PWM controller U1 in the primary power supply circuit 101 is pulled to the low level (corresponding to 0V), so that the PWM controller U1 does not work, at this time, no charging voltage is output from the output side of the secondary rectifying and voltage stabilizing circuit 102, and charging is terminated.
Specifically, the primary power supply circuit 101 is configured in a reverse circuit, and an input end of the primary power supply circuit is used for receiving a voltage signal output by a mains supply side (-220V), rectifying and step-down processing the voltage signal, and then outputting the voltage signal to the secondary rectifying, filtering and voltage stabilizing circuit 102;
the input end of the secondary rectifying, filtering and voltage stabilizing circuit 102 is coupled with the output end of the primary power supply circuit 101 through a transformer T1, the secondary rectifying, filtering and voltage stabilizing circuit 102 receives a voltage signal which is output by the secondary winding side of the transformer T1 and is subjected to voltage filtering and voltage stabilizing treatment to obtain a charging signal, and the charging signal is output to the main charging switch circuit 103;
the input end of the main charging switch circuit 103 is connected with the output end of the secondary rectifying, filtering and voltage stabilizing circuit 102 and is used for receiving a charging signal so as to charge a load to be charged (which can be a lead-acid storage battery);
the input end of the switch circuit 104 is respectively connected with an output end of the primary power supply circuit 101 and an output end of the main charging switch circuit 103, and is used for acquiring a voltage signal when a load is charged, and when the positive electrode and the negative electrode of the load are correctly connected, the switch circuit 104 is cut off;
when the positive and negative poles of the load are reversely connected, a current signal flows through the input end of the switch circuit 104 and is controlled to be conducted, the potential of the primary power circuit 101 is pulled down to a low level, the primary power circuit 101 does not work, so that the secondary rectifying, filtering and voltage stabilizing circuit 102 does not have current output to stop charging the load, and a plurality of protection circuits are provided when the positive and negative poles of the battery are reversely connected, so that the service lives of the battery and the charger are prolonged.
By using the technical scheme, through setting the main charging switch circuit 103 and the switch circuit 104 to cooperate, when the positive and negative poles of the load are reversely connected, the switch circuit 104 is conducted to control the power primary circuit 101 to be turned from on to off and stop outputting the charging current signal, so that the problem that the manufacturing cost of the charger can be increased by adding the function of preventing the positive and reverse connection of the dead battery or adding the MCU to identify and process the charging current in the prior art can be effectively solved.
In some embodiments, as shown in fig. 3, the main charging switch circuit 103 at least includes a first switch Q1 and a second switch Q2, wherein the first switch Q1 and the second switch Q2 are selected as P-channel MOS transistors, which have a switching effect, and when the gate is at a low level, the first switch Q1 and the second switch Q2 are controlled to be turned on.
Specifically, the drain electrode of the first switching tube Q1 is connected to the output end of the secondary rectifying, filtering and voltage stabilizing circuit 102, and is used for receiving a charging signal;
the drain of the second switching tube Q2 is connected to the positive pole of the load and the input of the switching circuit 104,
the source electrode of the first switching tube Q1 is connected with the source electrode of the second switching tube Q2,
the grid electrode of the first switching tube Q1 and the grid electrode of the second switching tube Q2 are connected with a driving signal end.
Under the condition that the anode and the cathode of a load are normally connected, and when the first switching tube Q1 and the second switching tube Q2 are conducted, a charging signal is output to the load through the first switching tube Q1 and the second switching tube Q2 so as to charge the load;
further, the main charging switch circuit 103 further includes a voltage divider circuit, wherein one end of the voltage divider circuit is connected to a driving signal end (not shown), the other end of the voltage divider circuit is connected to the gate of the first switch tube Q1 and the gate of the second switch tube Q2, and the third end of the voltage divider circuit is connected to the common end.
Specifically, the voltage dividing circuit comprises a seventh resistor R7, a fifteenth resistor R15 and a fifth diode D5,
wherein one end of the seventh resistor R7 is connected with a driving signal end (not shown),
the other end of the seventh resistor R7 is respectively connected with one end of the fifteenth resistor R15, the grid electrode of the first switching tube Q1 and the grid electrode of the second switching tube Q2,
the other end of the fifteenth resistor R15 is connected to the anode of the fifth diode D5,
the cathode of the fifth diode D5 is connected to the common terminal.
Further, the main charging switch circuit 103 further includes a fourth diode D4 and a tenth resistor R10, where a cathode of the fourth diode D4 is connected to an anode of the load, an anode of the fourth diode D4 is connected to one end of the tenth resistor R10, and the other end of the tenth resistor R10 is connected to an output signal end of the switch circuit 104.
Specifically, under the condition that the anode and the cathode of the battery are normally connected, a control signal is divided by a seventh resistor R7 and a fifteenth resistor R15 and is forward connected to the ground through a fifth diode D5, so that the first switching tube Q1 and the second switching tube Q2 are conducted, at the moment, the tenth resistor R10 and the photoelectric coupler (corresponding to PC 2A) do not work due to the reverse direction of the fourth diode D4, and the main circuit is charged normally;
when the battery is connected in reverse, the photo coupler (corresponding to PC 2A) and the fourth diode D4 obtain a forward voltage drop, and a current flows from bottom to top through the tenth resistor R10, at this time, the light emitting diode in the photo coupler (corresponding to PC 2A) is turned on, and when the photo coupler (corresponding to PC 2A) is turned on, a current signal is transmitted to the photo coupler (corresponding to PC 2B) to turn on, so that the resistance value is small when the photo coupler is turned on, the voltage of VDD at the 1 pin of the PWM controller U1 in the power supply primary circuit 101 is sent to the G pole of the silicon controlled rectifier U2 in the switch circuit 104 through the photo coupler (corresponding to PC 2B), and when the G pole of the silicon controlled rectifier U2 is higher than 0.8V, the voltage at the 1 pin of the PWM controller U1 in the power supply primary circuit 101 is pulled to a low level (corresponding to 0V), so that the PWM controller U1 does not work, at this time, no charge voltage is output at the output side of the PWM controller 102, and charging is terminated.
In some embodiments, as shown in fig. 2, the switch circuit 104 at least includes a photo-coupler (corresponding to PC2A-PC 2B) and a thyristor U2, and the photo-coupler (corresponding to PC2A-PC 2B) has functions of signal transmission and isolation;
the thyristor U2 has a switching function.
Specifically, one signal end (corresponding to K) of the photoelectric coupler (corresponding to PC 2A) is connected with the positive electrode of the load, the other signal end (corresponding to A) of the photoelectric coupler (corresponding to PC 2A) is connected with the public end,
the anode a of the thyristor U2 and the other signal end of the photo coupler (corresponding to the PC 2B) are connected to an output end of the power supply primary circuit 101,
the control end G of the silicon controlled rectifier U2 is connected with a signal output end of the photoelectric coupler (corresponding to the PC 2B),
the control end G of the silicon controlled rectifier U2 is also connected with one end of a twenty-first resistor R21, and the cathode of the silicon controlled rectifier U2 and the other end of the twenty-first resistor R21 are connected with a common end.
In some embodiments, as shown in fig. 2, the power primary circuit 101 includes at least a PWM controller U1,
when the anode and the cathode of the load are reversely connected, a signal end of the photoelectric coupler (corresponding to the PC 2B) has a current signal flowing through and is controlled to be conducted, so that the controllable silicon U2 is controlled to be conducted, the potential of the power input end (corresponding to the 1 pin) of the PWM controller U1 is pulled down to a low level, the power primary circuit 101 does not work, and the grid electrodes of the first switching tube Q1 and the second switching tube Q2 lose driving levels, so that the charging loop does not have current output.
The working principle is as follows: under the condition that the anode and the cathode of the battery are normally connected, a control signal is divided by a seventh resistor R7 and a fifteenth resistor R15 and is forward grounded through a fifth diode D5, so that the first switching tube Q1 and the second switching tube Q2 are conducted, at the moment, the tenth resistor R10 and a photoelectric coupler (corresponding to PC 2A) do not work due to the reverse direction of a fourth diode D4, and the main circuit is charged normally;
since the photocoupler (corresponding to PC 2A) and the fourth diode D4 obtain a forward voltage drop, and a current flows from bottom to top through the loop through the tenth resistor R10, at this time, the light emitting diode in the photocoupler (corresponding to PC 2A) is turned on, when the current signal photocoupler (corresponding to PC 2A) is turned on, the current signal photocoupler (corresponding to PC 2B) is transferred to the photocoupler (corresponding to PC 2B) to make it turned on, the resistance value is small when it is turned on, the voltage of VDD at the 1 pin of the PWM controller U1 in the primary power supply circuit 101 is sent to the G pole of the thyristor U2 in the switch circuit 104 through the photocoupler (corresponding to PC 2B), when the G pole of the thyristor U2 is higher than 0.8V, the AK pole of the thyristor U2 is turned on to be 0Ω, and the voltage at the 1 pin of the PWM controller U1 in the primary power supply circuit 101 is pulled to a low level (corresponding to 0V), so that the output side of the secondary rectifying and voltage stabilizing circuit 102 is not operated, and charging is terminated.
At this time, no matter whether the voltage of the G pole of the silicon controlled rectifier U2 is the voltage or not, the AK end of the silicon controlled rectifier U2 is always triggered to be turned on, and when the silicon controlled rectifier U2 is turned off, the anode of the silicon controlled rectifier U2 is controlled to be 0V, so that the AK of the silicon controlled rectifier U2 can be turned off. The photoelectric coupler (corresponding to PC 2B) is conducted, namely the 1-pin VDD voltage of the PWM controller U1 is pulled to be 0V, the charging loop is free of current, and damage caused by the fact that the positive electrode and the negative electrode of the battery are connected is effectively protected.
At this time, the anode maintaining voltage of the thyristor U2 is provided by the second resistor R2 and the fifth resistor R5 of the primary circuit 101, so that the AK pole of the thyristor U2 is always in a short circuit state, so that the fault can be relieved only when the AC power is turned off again and turned on again, and the false operation of repeated starting after reverse connection of the battery is effectively protected;
when the positive and negative polarities of the batteries are reversely connected, the fifth diode D5 is reverse, no current passes through the fifth diode D5, the seventh resistor R7 and the fifteenth resistor R15 have no voltage division, the first switching tube Q1 and the second switching tube Q2 are cut off, and the charging main loop is disconnected, namely, no charging current is output to damage the batteries, so that the power supply and the batteries are effectively protected, and the batteries and the chargers are prevented from being damaged due to the fact that the batteries are connected with wrong polarities.
The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.
Claims (8)
1. A circuit for preventing reverse connection of positive and negative electrodes of a battery is characterized by comprising:
the power supply primary circuit is arranged in the reverse connection circuit, and the input end of the power supply primary circuit is used for receiving a voltage signal output by the mains supply side and rectifying and reducing the voltage signal;
the input end of the secondary rectifying, filtering and voltage stabilizing circuit is coupled with the output end of the primary circuit of the power supply and is used for receiving the voltage signal after the voltage is reduced, and then filtering and voltage stabilizing treatment is carried out on the voltage signal to obtain a charging signal;
the input end of the main charging switch circuit is connected with the output end of the secondary rectifying, filtering and voltage stabilizing circuit and is used for receiving the charging signal so as to charge a load to be charged;
the input end of the switching circuit is respectively connected with one output end of the power supply primary circuit and the output end of the main charging switching circuit, and when the positive electrode and the negative electrode of the load are correctly connected, the switching circuit is cut off;
when the positive electrode and the negative electrode of the load are reversely connected, a current signal flows through the input end of the switch circuit and is controlled to be conducted, the potential of the primary circuit of the power supply is pulled down to a low level, and the primary circuit of the power supply does not work, so that the charging loop does not output current.
2. The circuit for preventing reverse connection of positive and negative poles of a battery according to claim 1, wherein,
the main charging switch circuit at least comprises a first switch tube and a second switch tube,
the drain electrode of the first switching tube is connected with the output end of the secondary rectifying, filtering and voltage stabilizing circuit,
the drain electrode of the second switching tube is connected with the positive electrode of the load and the input end of the switching circuit,
the source electrode of the first switching tube is connected with the source electrode of the second switching tube,
and the grid electrode of the first switching tube and the grid electrode of the second switching tube are connected with a driving signal end.
3. The circuit for preventing reverse connection of positive and negative poles of a battery according to claim 2, wherein,
the main charge switch circuit further includes a voltage divider circuit,
one end of the voltage dividing circuit is connected with the driving signal end,
the other end of the voltage dividing circuit is connected with the grid electrode of the first switching tube and the grid electrode of the second switching tube,
and the third end of the voltage dividing circuit is connected with the common end.
4. The circuit for preventing reverse connection of positive and negative poles of a battery according to claim 3, wherein,
the voltage dividing circuit comprises a seventh resistor, a fifteenth resistor and a fifth diode,
one end of the seventh resistor is connected with the driving signal end,
the other end of the seventh resistor is respectively connected with one end of the fifteenth resistor, the grid electrode of the first switching tube and the grid electrode of the second switching tube,
the other end of the fifteenth resistor is connected with the anode of the fifth diode,
and the cathode of the fifth diode is connected with the common terminal.
5. The circuit for preventing reverse connection of positive and negative poles of a battery according to claim 3, wherein,
the main charge switch circuit further includes a fourth diode and a tenth resistor,
the cathode of the fourth diode is connected with the anode of the load,
an anode of the fourth diode is connected with one end of the tenth resistor,
the other end of the tenth resistor is connected with an output signal end of the switching circuit.
6. The circuit for preventing reverse connection of positive and negative poles of a battery according to claim 2, wherein,
the switch circuit at least comprises a photoelectric coupler and a controllable silicon,
a signal end of the photoelectric coupler is connected with the positive electrode of the load,
the anode of the controllable silicon and the other signal end of the photoelectric coupler are connected with an output end of the power supply primary circuit,
the control end of the controllable silicon is connected with a signal output end of the photoelectric coupler,
and the cathode of the controllable silicon is connected with the common terminal.
7. The circuit for preventing reverse connection of battery anode and cathode as claimed in claim 6, wherein,
the power supply primary circuit includes at least a PWM controller,
the power input end of the PWM controller is connected with the anode of the controllable silicon and the other signal end of the photoelectric coupler,
when the positive electrode and the negative electrode of the load are reversely connected, a signal end of the photoelectric coupler is provided with a current signal to flow through and is controlled to be conducted, so that the controllable silicon is controlled to be conducted, the potential of the power input end of the PWM controller is pulled down to a low level, the power primary circuit does not work, and the grid electrodes of the first switching tube and the second switching tube lose driving level, so that the charging loop does not output current.
8. The circuit for preventing reverse connection of battery anode and cathode as claimed in claim 7, wherein,
the first switching tube and the second switching tube are selected as P-channel MOS tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321684706.5U CN220107635U (en) | 2023-06-30 | 2023-06-30 | Circuit for preventing reverse connection of positive electrode and negative electrode of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321684706.5U CN220107635U (en) | 2023-06-30 | 2023-06-30 | Circuit for preventing reverse connection of positive electrode and negative electrode of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220107635U true CN220107635U (en) | 2023-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321684706.5U Active CN220107635U (en) | 2023-06-30 | 2023-06-30 | Circuit for preventing reverse connection of positive electrode and negative electrode of battery |
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| Country | Link |
|---|---|
| CN (1) | CN220107635U (en) |
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2023
- 2023-06-30 CN CN202321684706.5U patent/CN220107635U/en active Active
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