CN213461184U - Battery reverse connection alarm protection circuit - Google Patents
Battery reverse connection alarm protection circuit Download PDFInfo
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- CN213461184U CN213461184U CN202022467034.5U CN202022467034U CN213461184U CN 213461184 U CN213461184 U CN 213461184U CN 202022467034 U CN202022467034 U CN 202022467034U CN 213461184 U CN213461184 U CN 213461184U
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Abstract
The utility model discloses a battery joins conversely warning protection circuit, it includes battery input port, battery output port, first MOS pipe, second MOS pipe, first DC power module, second DC power module, first bee calling organ and first switch, battery input positive port is connected with the drain electrode of second MOS pipe, the input negative terminal of second DC power module, still is connected with the input positive terminal of first DC power module through first switch, first diode; the battery input negative port is connected with the input negative end of the first DC/DC power supply module and the battery output negative end, and is also connected with the input positive end of the second DC/DC power supply module through a second diode; the output positive end of the first DC/DC power supply module is connected with the bases of the first and second MOS tubes, and the output negative end of the first DC/DC power supply module is connected with the sources of the first and second MOS tubes; and the output positive and negative terminals of the second DC/DC power supply module are connected with one end of the first buzzer. The utility model discloses can prevent effectively that the battery from joining conversely the destructive influence that brings, improve the reliability of power and protection output device's safety.
Description
Technical Field
The utility model belongs to the technical field of the DC power supply technique and specifically relates to a battery joins conversely warning protection circuit is related to.
Background
When the power supply supplies power to the dc load, the two poles of the battery need to be correctly connected, for example, the battery is used as the power supply, the positive pole and the negative pole of the battery need to be correctly connected according to the input of the electric equipment, and if the connection is mistakenly connected with the counter electrode, the electric equipment cannot work normally, and even some components in the circuit can be damaged. At present, because present transposition protection circuit structure is more complicated, and the cost is higher, does not set up transposition protection circuit in the battery power supply mostly, if improper operation in the use, connects the positive, negative pole of battery to the contrary very easily, connects the back at the battery transposition, and rear end consumer can produce destructive influence because the transposition of voltage source to make equipment unable work, cause the system paralyses, it is more troublesome and the price is higher to maintain.
Disclosure of Invention
In order to solve the above problem, the present invention provides a battery reverse connection alarm protection circuit, which can effectively prevent the destructive influence caused by the reverse connection of the battery, and improve the reliability of the power supply and the safety of the protection output device.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a battery reverse connection alarm protection circuit comprises a battery input port, a battery output port, a first MOS tube M1, a second MOS tube M2, a first DC/DC power supply module N1, a second DC/DC power supply module N2, a first buzzer BZ1 and a first switch S, wherein a positive input port of the battery is connected with one end of the first switch S, a drain electrode of the second MOS tube M2 and an input negative end of the second DC/DC power supply module N2, the other end of the first switch S is connected with an anode of a first diode D1, and a cathode of the first diode D1 is connected with an input positive end of the first DC/DC power supply module N1; the battery input negative port is connected with the input negative end of the first DC/DC power supply module N1 and the battery output negative end, and is also connected with the input positive end of the second DC/DC power supply module N2 through a second diode D2; the positive output terminal of the first DC/DC power supply module N1 is connected to the base of the first MOS transistor M1 and the base of the second MOS transistor M2 through a first resistor R1, and the negative output terminal is connected to the source of the first MOS transistor M1 and the source of the second MOS transistor M2; the drain electrode of the first MOS tube M1 is connected with the positive output end of the battery; the positive output terminal of the second DC/DC power supply module N2 is connected with one end of the first buzzer BZ1 through a second resistor R2, and the negative output terminal is connected with the other end of the first buzzer BZ 1.
Furthermore, the first MOS transistor M1 and the second MOS transistor M2 are both N-channel field effect transistors.
Due to the adoption of the technical scheme, the utility model discloses have following superiority:
this battery transposition warning protection circuit, its circuit design is simple, and the device is few, convenient to use, and control is accurate, and the reliability is high, is applicable to battery power supply, not only effectively prevents the destructive influence that the battery transposition brought, improves the reliability of power, can in time remind the maloperation through the alarming function of bee calling organ moreover, effectively protects the consumer at rear end, and application range is wide, has extensive application prospect in the power application field.
Drawings
Fig. 1 is a schematic diagram of the battery reverse connection alarm protection circuit of the present invention.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and examples.
As shown IN fig. 1, the reverse battery connection alarm protection circuit includes a battery input port, a battery output port, a first MOS transistor M1, a second MOS transistor M2, a first diode D1, a first DC/DC power module N1, a first resistor R1, a second diode D2, a second DC/DC power module N2, a second resistor R2, a first buzzer BZ1, and a first switch S, wherein the positive battery input port is connected to one end of the first switch S, the drain of the second MOS transistor M2, and the negative input terminal (-IN) of the second DC/DC power module N2, the other end of the first switch S is connected to the anode of the first diode D1, and the cathode of the first diode D1 is connected to the positive input terminal (+ IN) of the first DC/DC power module N1; the battery input negative port is connected with the input negative end (-IN) of the first DC/DC power supply module N1 and the battery output negative end, and is also connected with the input positive end (+ IN) of the second DC/DC power supply module N2 through a second diode D2; an output positive terminal (+ OUT) of the first DC/DC power supply module N1 is connected to the base of the first MOS transistor M1 and the base of the second MOS transistor M2 through a first resistor R1, and an output negative terminal (-OUT) is connected to the source of the first MOS transistor M1 and the source of the second MOS transistor M2; the drain electrode of the first MOS tube M1 is connected with the positive output end of the battery; the positive output terminal (+ OUT) of the second DC/DC power supply module N2 is connected to one end of the first buzzer BZ1 through a second resistor R2, and the negative output terminal (-OUT) is connected to the other end of the first buzzer BZ 1.
The battery output positive end and the output negative end are connected with the output port of the electric equipment.
The first MOS transistor M1 and the second MOS transistor M2 are both N-channel fets, and the type is preferably IXFH170N 10P.
The first DC/DC power supply module N1 and the second DC/DC power supply module N2 are preferably SUS1R 51212C.
The utility model discloses battery joins conversely warning protection circuit, its working process is: after the battery input positive port and the battery input negative port are respectively connected with a battery positive electrode and a battery negative electrode, the first switch S is closed, the first diode D1 is conducted, the first DC/DC module N1 is conducted, and the output positive end (+ OUT) and the output negative end (-OUT) of the first DC/DC module N1 have output voltage; meanwhile, the first MOS tube M1 and the second MOS tube M2 are conducted through the first resistor R1, and a battery is connected between the positive output end of the battery and the negative output end of the battery to supply power to electric equipment; while the second DC/DC block N2 is not damaged due to the reverse blocking function of the second diode D2.
The first switch S is disconnected, after the first diode D1 is cut off, the first DC/DC module N1 is not conducted, no output voltage exists at the positive output end (+ OUT) and the negative output end (-OUT) of the first DC/DC module, the first MOS tube M1 and the second MOS tube M2 are cut off, the battery voltage between the positive battery output end and the negative battery output end is stopped in a mode of butt joint and reverse cut-off of the diodes in the MOS tubes, and power supply of electric equipment is blocked.
When the battery is reversely connected, namely the negative input port and the positive input port of the battery are respectively connected with the positive electrode and the negative electrode of the battery, even if the first switch S is closed, the first DC/DC module N1 is not conducted, and the positive output port (+ OUT) and the negative output port (-OUT) of the first DC/DC module have no output voltage; the first diode D1 reverse blocking function at this time makes the first DC/DC module N1 not damaged; at this time, the second diode D2 is turned on, the second DC/DC module N2 is turned on, and the output positive terminal (+ OUT) and the output negative terminal (-OUT) of the second DC/DC module have output voltages; the first buzzer BZ1 is conducted through a current-limiting resistor, namely a second resistor R2, and the reverse connection alarm function is achieved. Meanwhile, the battery voltage between the battery output positive terminal and the battery output negative terminal is stopped in a mode of butt joint and reverse cut-off of a diode in the MOS tube, power supply at the rear end is blocked, and electric equipment is protected from being damaged.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A kind of battery connects the warning protective circuit conversely, its characteristic is: the battery power supply comprises a battery input port, a battery output port, a first MOS tube M1, a second MOS tube M2, a first DC/DC power supply module N1, a second DC/DC power supply module N2, a first buzzer BZ1 and a first switch S, wherein a positive input port of the battery is connected with one end of the first switch S, a drain electrode of the second MOS tube M2 and an input negative end of the second DC/DC power supply module N2, the other end of the first switch S is connected with an anode of a first diode D1, and a cathode of the first diode D1 is connected with an input positive end of the first DC/DC power supply module N1; the battery input negative port is connected with the input negative end of the first DC/DC power supply module N1 and the battery output negative end, and is also connected with the input positive end of the second DC/DC power supply module N2 through a second diode D2; the positive output terminal of the first DC/DC power supply module N1 is connected to the base of the first MOS transistor M1 and the base of the second MOS transistor M2 through a first resistor R1, and the negative output terminal is connected to the source of the first MOS transistor M1 and the source of the second MOS transistor M2; the drain electrode of the first MOS tube M1 is connected with the positive output end of the battery; the positive output terminal of the second DC/DC power supply module N2 is connected with one end of the first buzzer BZ1 through a second resistor R2, and the negative output terminal is connected with the other end of the first buzzer BZ 1.
2. The reverse battery protection circuit of claim 1, wherein: the first MOS transistor M1 and the second MOS transistor M2 are both N-channel field effect transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022467034.5U CN213461184U (en) | 2020-10-30 | 2020-10-30 | Battery reverse connection alarm protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022467034.5U CN213461184U (en) | 2020-10-30 | 2020-10-30 | Battery reverse connection alarm protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213461184U true CN213461184U (en) | 2021-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022467034.5U Active CN213461184U (en) | 2020-10-30 | 2020-10-30 | Battery reverse connection alarm protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213461184U (en) |
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2020
- 2020-10-30 CN CN202022467034.5U patent/CN213461184U/en active Active
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