CN210985684U - Portable power source charging protection circuit and portable power source leased equipment - Google Patents
Portable power source charging protection circuit and portable power source leased equipment Download PDFInfo
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- CN210985684U CN210985684U CN201921706186.7U CN201921706186U CN210985684U CN 210985684 U CN210985684 U CN 210985684U CN 201921706186 U CN201921706186 U CN 201921706186U CN 210985684 U CN210985684 U CN 210985684U
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Abstract
The utility model is suitable for an electricity field provides a portable power source charging protection circuit and portable power source leased equipment. The mobile power supply charging protection circuit comprises a charging interface, an anti-overcharging fuse, an electric switch, a first switch tube, a second switch tube, a third resistor and a fourth resistor; the other end of the anti-overcharging fuse is connected with the first end of the electric switch, the second end of the electric switch is connected with the power supply, the third end of the electric switch is connected with the collector/drain electrode of the first switching tube, the emitter/source electrode of the first switching tube is connected with the collector/drain electrode of the third switching tube, the emitter/source electrode of the second switching tube is grounded, the base/grid electrode of the second switching tube is connected with the first end of the fourth resistor, and the second ends of the third resistor and the fourth resistor are connected with the other output end of the control unit. The utility model discloses can break off charging circuit the very first time before preventing overcharging fuse disconnection circuit, the reaction is more timely rapid than preventing the overcharge fuse, and in time protective apparatus and circuit element do not receive the damage, and the embodiment is simple and easy, and is high-efficient reliable.
Description
Technical Field
The utility model belongs to the electricity field especially relates to a portable power source charging protection circuit and portable power source leased equipment.
Background
In order to prevent short circuit, it is a common practice in the prior art to connect a fuse in a circuit, and once short circuit occurs, the fuse will be blown, thereby automatically cutting off the circuit and protecting the electric appliance and circuit elements. However, since it takes a certain time for the fuse to be blown, the components of the electrical appliance and the circuit are damaged to various degrees before the fuse is blown. Therefore, when a short circuit occurs, the fuse alone cannot minimize damage to the electrical appliances and components because the fuse does not react quickly to the short circuit.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a portable power source protection circuit and portable power source lease equipment that charges aims at solving when taking place the short circuit, because the fuse is not fast enough to the reaction rate of short circuit, only the fuse can not furthest reduce the problem of the impaired degree of electrical apparatus and component.
In a first aspect, the utility model provides a portable power source charging protection circuit, including charging interface P1, prevent overcharging fuse F1, electric switch, first switch tube, second switch tube, third resistance and fourth resistance; the first switch tube and the second switch tube are both MOS tubes or triodes, the charging interface P1 is respectively connected with one end of an anti-overcharging fuse F1 and a first end of a third resistor, the other end of the anti-overcharging fuse F1 is connected with the first end of the electric switch, the second end of the electric switch is connected with a power supply, the third end of the electric switch is connected with a collector/drain electrode of the first switch tube, the collector/drain electrode of the first switch tube is also connected with the power supply, a base electrode/grid electrode of the first switch tube is connected with one output end of the control unit, an emitter electrode/source electrode of the first switch tube is connected with a collector/drain electrode of the second switch tube, an emitter electrode/source electrode of the second switch tube is grounded, a base electrode/grid electrode of the second switch tube is connected with a first end of a fourth resistor, and the second ends of the third resistor and the fourth resistor are both.
Further, the electric switch is a MOS switch U2, the other end of the anti-overcharging fuse F1 is connected with a drain D1 of the MOS switch U2, a source S1 of the MOS switch U2 is connected with a power supply, and a grid G1 of the MOS switch U2 is connected with a collector/drain of the first switch tube.
Furthermore, the electric switch is a triode Q3, the other end of the anti-overcharging fuse F1 is connected with the drain electrode of a triode Q3, the source electrode of the triode Q3 is connected with a power supply, and the grid electrode of the triode Q3 is connected with the collector/drain electrode of the first switching tube.
Further, the electric switch is a relay R L Y1, the other end of the anti-overcharging fuse F1 is connected with the output end of a relay R L Y1, the common end of the relay R L Y1 is connected with a power supply, the first control end of the relay R L Y1 is connected with the power supply through a first resistor R1, and the second control end of the relay R L Y1 is connected with the collector/drain of the first switching tube.
Further, the overcharge-prevention fuse is a resettable fuse.
In a second aspect, the present invention provides a portable power source leasing device including the portable power source charging protection circuit of the first aspect.
The utility model discloses in, because portable power source charge protection circuit includes the second switch tube, consequently utilize the second switch tube connection or disconnection on the voltage variation control protection circuit to control charging circuit's connection or disconnection, preempt one step earlier and break off charging circuit the very first time before preventing the overcharge fuse circuit-breaking, the reaction is more timely rapid than preventing the overcharge fuse, in time protective apparatus and circuit element do not receive the damage, and implementation scheme is simple and easy, high-efficient reliable. In addition, the overcharge-preventing fuse is a restorable fuse, and the fuse tube can automatically restore to be connected with a circuit after the circuit is short-circuited, so that the trouble of frequently replacing the fuse tube due to circuit faults is avoided, and the method is simple, convenient and efficient.
Drawings
Fig. 1 is a schematic diagram of a charging protection circuit of a mobile power supply according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a mobile power supply charging protection circuit provided by the embodiment of the present invention.
Fig. 3 is a schematic diagram of a charging protection circuit of a mobile power supply provided by the third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
Referring to fig. 1, a charging protection circuit of a portable power source according to a first embodiment of the present invention includes a charging interface P1, an overcharge-proof fuse F1, an electric switch (e.g., MOS switch U2), a first switch tube, a second switch tube, a third resistor, and a fourth resistor; the first switch tube and the second switch tube are both MOS tubes or triodes, the charging interface P1 is respectively connected with one end of an anti-overcharging fuse F1 and a first end of a third resistor, the other end of the anti-overcharging fuse F1 is connected with a first end of an electric switch (namely a drain D1 of an MOS switch U2), a second end of the electric switch (namely a source S1 of an MOS switch U2) is connected with a power supply, a third end of the electric switch (namely a grid G1 of the MOS switch U2) is connected with a collector/drain of the first switch tube, the collector/drain of the first switch tube is also connected with the power supply, a base/grid of the first switch tube is connected with an output end of the control unit, an emitter/source of the first switch tube is connected with a collector/drain of the second switch tube, an emitter/source of the second switch tube is grounded, a base/grid of the second switch tube is connected with a first end of the fourth resistor, and second ends of the third resistor and the fourth resistor are connected with another output end of the.
The third resistor is used for detecting whether output exists or not by the control unit after voltage division, the fourth resistor is used for performing closed-loop control, and when the output end is short-circuited, the control input end is quickly closed.
The embodiment of the utility model provides a portable power source protection circuit that charges can also include wave filter EC1, and the second end of electric switch passes through wave filter EC1 ground connection.
The embodiment of the utility model provides a portable power source charge protection circuit can also include first resistance R1 and second resistance R2, and the collecting electrode/drain electrode of first switch tube connects the power through first resistance R1, and the base/grid electrode of first switch tube passes through second resistance R2 and connects an output of the control unit, ensures to add the voltage value on the second switch tube and accords with the normal operating requirement of switch triode.
In the first embodiment of the present invention, the overcharge-preventing fuse may be a resettable fuse. The charging interface P1 may be a charging thimble. The first switching transistor shown in fig. 1 is a first switching transistor Q1, and the second switching transistor Q2. The first switching transistor Q1 and the second switching transistor Q2 are NPN transistors. The third and fourth resistances are resistances in the exclusion Rp 1.
The embodiment of the utility model provides a portable power source charge protection circuit's theory of operation as follows:
under the normal condition, first switch triode Q1 and second switch triode Q2 switch on, and other circuits normally work, portable power source's the interface that charges with the utility model provides a portable power source protection circuit that charges interface P1 normally contacts, and portable power source can normally charge. And once the internal power input of the mobile power supply is short-circuited, when the charging interface of the mobile power supply is in contact with the charging interface P1, the positive electrode and the negative electrode of the charging interface P1 are directly connected, and the charging circuit is short-circuited. During the short circuit, the current of the charging circuit becomes very large instantaneously, and the charging voltage output from the charging interface P1 is pulled down to 0V instantaneously.
Normally, the second switching transistor Q2 needs high level power supply to turn on the circuit, since the control pin controlling the second switching transistor Q2 is configured to input (with pull-down resistor) mode immediately after enabling charging, when there is 5V output at the charging interface P1, the second switching transistor Q2 is in on state at this time; when portable power source ' S power input short circuit, the embodiment of the utility model provides a portable power source charge protection circuit does not have the high level to insert, two switch triodes Q2 can be in off-state immediately, even first switch triode Q1 still is in on-state this moment, but MOS switch U2 is leading-in only 5V ' S high level, and MOS switch U2 ' S the G utmost point must the low level insert can control the S1 utmost point and the D1 utmost point on the MOS switch U2 and link to each other, with the charging circuit that switches on, consequently, MOS switch U2 disconnection this moment, the charging circuit who contains MOS switch U2 also breaks along with it, thereby close the function of charging, elements such as protection MOS switch U2 and portable power source do not receive the damage.
Referring to fig. 2, a charging protection circuit for a mobile power supply according to the second embodiment of the present invention is different from the charging protection circuit for a mobile power supply according to the first embodiment of the present invention in that the electric switch is a transistor Q3, which is an N-channel MOS transistor, the other end of the anti-overcharging fuse F1 is connected to the drain of a transistor Q3, the source of the transistor Q3 is connected to the power supply, and the gate of the transistor Q3 is connected to the collector/drain of the first switch tube.
Referring to fig. 3, a charging protection circuit for a mobile power supply provided by the third embodiment of the present invention is different from the charging protection circuit for a mobile power supply provided by the first embodiment of the present invention in that the electric switch is a relay R L Y1, the other end of the overcharge-proof fuse F1 is connected to the output end of the relay R L Y1, the common terminal of the relay R L Y1 is connected to the power supply, the first control terminal of the relay R L Y1 is connected to the power supply through a first resistor R1, and the second control terminal of the relay R L Y1 is connected to the collector/drain of the first switch tube.
The embodiment of the utility model provides a fourth still provides one kind and includes the utility model provides a portable power source leased equipment that portable power source charging protection circuit that one, two or three provided.
The utility model discloses in, because the portable power source protection circuit that charges includes second switch triode Q2, consequently utilize second switch triode Q2 on the voltage variation control protection circuit to connect or break off, with the connection or the disconnection of control charging circuit, the very first time disconnection charging circuit before preventing overcharging fuse disconnection circuit in advance, the reaction is more timely rapid than preventing overcharging fuse, in time protective apparatus and circuit element do not receive the damage, and the implementation scheme is simple and easy, and is high-efficient reliable. In addition, the overcharge-preventing fuse is a restorable fuse, and the fuse tube can automatically restore to be connected with a circuit after the circuit is short-circuited, so that the trouble of frequently replacing the fuse tube due to circuit faults is avoided, and the method is simple, convenient and efficient.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (11)
1. A charging protection circuit of a mobile power supply is characterized by comprising a charging interface P1, an anti-overcharging fuse F1, an electric switch, a first switch tube, a second switch tube, a third resistor and a fourth resistor; the first switch tube and the second switch tube are both MOS tubes or triodes, the charging interface P1 is respectively connected with one end of an anti-overcharging fuse F1 and a first end of a third resistor, the other end of the anti-overcharging fuse F1 is connected with the first end of the electric switch, the second end of the electric switch is connected with a power supply, the third end of the electric switch is connected with a collector/drain electrode of the first switch tube, the collector/drain electrode of the first switch tube is also connected with the power supply, a base electrode/grid electrode of the first switch tube is connected with one output end of the control unit, an emitter electrode/source electrode of the first switch tube is connected with a collector/drain electrode of the second switch tube, an emitter electrode/source electrode of the second switch tube is grounded, a base electrode/grid electrode of the second switch tube is connected with a first end of a fourth resistor, and the second ends of the third resistor and the fourth resistor are both.
2. The mobile power supply charging protection circuit of claim 1, wherein the electric switch is a MOS switch U2, the other end of the overcharge protection fuse F1 is connected to a drain D1 of a MOS switch U2, a source S1 of the MOS switch U2 is connected to a power supply, and a gate G1 of a MOS switch U2 is connected to a collector/drain of the first switch tube.
3. The charging protection circuit of claim 1, wherein the electric switch is a transistor Q3, the other end of the overcharge protection fuse F1 is connected to the drain of a transistor Q3, the source of the transistor Q3 is connected to the power supply, and the gate of the transistor Q3 is connected to the collector/drain of the first switch tube.
4. The charging protection circuit of claim 3, wherein the transistor Q3 is an N-channel MOS transistor.
5. The charging protection circuit for the mobile power supply of claim 1, wherein the electric switch is a relay R L Y1, the other end of the anti-overcharging fuse F1 is connected with the output end of a relay R L Y1, the common end of the relay R L Y1 is connected with the power supply, the first control end of the relay R L Y1 is connected with the power supply through a first resistor R1, and the second control end of the relay R L Y1 is connected with the collector/drain of the first switching tube.
6. The mobile power supply charging protection circuit of claim 1, further comprising a filter EC1, wherein the second terminal of the electrical switch is connected to ground through a filter EC 1.
7. The charging protection circuit for the mobile power supply of any one of claims 2 to 4, further comprising a first resistor R1 and a second resistor R2, wherein the collector/drain of the first switch is connected to the power supply through the first resistor R1, and the base/gate of the first switch is connected to an output terminal of the control unit through the second resistor R2.
8. The mobile power supply charging protection circuit of claim 1, wherein the anti-overcharge fuse is a resettable fuse; the charging interface P1 is a charging thimble.
9. The charging protection circuit of claim 1, wherein the first switching transistor is a first switching transistor Q1, the second switching transistor is a second switching transistor Q2, and the first switching transistor Q1 and the second switching transistor Q2 are NPN transistors.
10. The mobile power supply charge protection circuit of claim 1, wherein the third resistor and the fourth resistor are resistors within an exclusion Rp 1.
11. A mobile power supply rental device comprising the mobile power supply charging protection circuit of any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921706186.7U CN210985684U (en) | 2019-10-12 | 2019-10-12 | Portable power source charging protection circuit and portable power source leased equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921706186.7U CN210985684U (en) | 2019-10-12 | 2019-10-12 | Portable power source charging protection circuit and portable power source leased equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210985684U true CN210985684U (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921706186.7U Active CN210985684U (en) | 2019-10-12 | 2019-10-12 | Portable power source charging protection circuit and portable power source leased equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210985684U (en) |
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2019
- 2019-10-12 CN CN201921706186.7U patent/CN210985684U/en active Active
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Effective date of registration: 20210413 Granted publication date: 20200710 |
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| PD01 | Discharge of preservation of patent |
Date of cancellation: 20210918 Granted publication date: 20200710 |
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