CN203826921U - Charger short circuit protection device - Google Patents
Charger short circuit protection device Download PDFInfo
- Publication number
- CN203826921U CN203826921U CN201420181969.9U CN201420181969U CN203826921U CN 203826921 U CN203826921 U CN 203826921U CN 201420181969 U CN201420181969 U CN 201420181969U CN 203826921 U CN203826921 U CN 203826921U
- Authority
- CN
- China
- Prior art keywords
- charger
- relay
- output end
- positive output
- closed contact
- 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.)
- Expired - Fee Related
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Provided is a charger short circuit protection device, formed by a coil, a reed switch, a unidirectional SCR, a relay, a light emitting diode, a switch, a relay normally-closed contact, a capacitor, and a resistor. The coil is winded on the reed switch. The coil is connected in series between the normally-closed contact and the positive input end of the charger. The other end of the normally-closed contact is connected with the positive output end of the charger. The reed switch and the resistor are connected in series between the positive output end of the charger and the control electrode of the SCR. The relay and the SCR are connected in series between the positive output end and the negative output end of the charger. The resistor and the light emitting diode are connected in parallel with the relay. The switch is connected in series between the positive output end of the charger and the relay. The capacitor is connected in series between the reed switch and the negative output end of the charger. Working mode of the device is that when short-circuit current increases, electromagnetic field becomes larger, and the contacts in the reed switch are closed, the unidirectional SCR is connected, the relay is pulled in and the relay normally-closed contact is disconnected, and the circuit of the charger positive output plug is cut off, so that an objective of protection is achieved.
Description
Technical field
The utility model relates to a kind of protective device, relates to specifically a kind of charger protector.
Background technology
At present a lot of chargers all do not arrange short-circuit protection; this is easy to burn charger if any short circuit in use; even if the high state that do not have having of the circuit more complicated cost that has in addition the charger of short-circuit protection function to have shows and removing function; described removing function refers to: charger short circuit does not arrange a key restore funcitons after removing, plug attaching plug again while needing to recover charge function.
Summary of the invention
For overcoming that the charger having does not have short-circuit protection function and the complicated cost of the charger circuit that has is high and not showing, this deficiency of removing function, it is simple that the purpose of this utility model is to provide a kind of circuit, there is the charger short-circuit protection of demonstration and removing function, for reaching above-mentioned object the utility model for the technical scheme that technical solution problem adopts be: by a coil, a tongue tube, an one-way SCR, a relay, a light-emitting diode for show state, a switch recovering for a key, a relay normally-closed contact, an electric capacity, a charger short-circuit protection of two current-limiting resistance compositions, described coil is on tongue tube, one end of described coil is connected with the anode of charger output plug, and the other end is connected with one end of relay normally-closed contact, the other end of described relay normally-closed contact is connected with charger positive output end, described tongue tube one end is connected with the positive output end of charger, and the other end is connected with the control utmost point of one-way SCR by a resistance, be connected with the negative output terminal of charger by an electric capacity simultaneously, the described switch series of recovering for a key is connected on positive output end and the relay of charger, between a current-limiting resistance, the other end of described relay and the anodic bonding of one-way SCR, described silicon controlled negative electrode is connected with the negative output terminal of charger, the positive pole of described light-emitting diode is connected with a current-limiting resistance, and the negative pole of light-emitting diode and the anodic bonding of one-way SCR.
Working method of the present utility model is: be greatly that flowing through coil electric current is while also becoming large when short circuit current becomes, it is large that the electromagnetic field of its generation also becomes thereupon, the electromagnetic field that this change is large makes the contact adhesive in tongue tube, so one-way SCR conducting, relay attracting electric relay normally-closed contact disconnects, the loop of charger positive output plug is cut off, light-emitting diode is lighted simultaneously, because unidirectional controllable tube is connected in DC power supply, though at this moment control signal removed controllable silicon still keep conducting state be charger keep guard mode, if short-circuit bar just can recover charge function except clicking the switch recovering for a key afterwards.
The beneficial effects of the utility model are: it not only can play a protective role in the time of charger short circuit, but also acousto-optic shows and has a key restore funcitons.
Brief description of the drawings
Accompanying drawing 1 is circuit diagram of the present utility model
Embodiment
To specifically narrate the technical solution of the utility model with reference to accompanying drawing: by a coil 9, a tongue tube 2, an one-way SCR 5, a relay 8, a light-emitting diode 6 for show state, a switch 10 recovering for a key, a relay normally-closed contact 1, an electric capacity 3, two current-limiting resistances 4, a charger short-circuit protection of 7 compositions, coil 9 is on tongue tube 2, one end of coil 9 is connected with the anode of charger output plug, and the other end is connected with one end of relay normally-closed contact 1, the other end of relay normally-closed contact 1 is connected with charger positive output end, tongue tube 2 one end are connected with the positive output end of charger, and the other end is connected with the control utmost point of one-way SCR 5 by a resistance 4, be connected with the negative output terminal of charger by electric capacity 3 simultaneously, switch 10 is serially connected in positive output end and the relay 8 of charger, between current-limiting resistance 7, the anodic bonding of the other end of relay 8 and one-way SCR 5, the negative electrode of controllable silicon 5 is connected with the negative output terminal of charger, the positive pole of light-emitting diode 6 is connected with current-limiting resistance 7, and the anodic bonding of the negative pole of light-emitting diode 6 and one-way SCR 5.
Claims (2)
1. a charger short-circuit protection is characterized in that: coil (9) is on tongue tube (2), one end of coil (9) is connected with the anode of charger output plug, and the other end is connected with one end of relay normally-closed contact (1), the other end of relay normally-closed contact (1) is connected with charger positive output end, tongue tube (2) one end is connected with the positive output end of charger, and the other end is connected with the control utmost point of one-way SCR (5) by a resistance (4), be connected with the negative output terminal of charger by electric capacity (3) simultaneously, switch (10) is serially connected in positive output end and the relay (8) of charger, between current-limiting resistance (7), the anodic bonding of the other end of relay (8) and one-way SCR (5), the negative electrode of controllable silicon (5) is connected with the negative output terminal of charger.
2. a kind of charger short-circuit protection according to claim 1 is characterized in that: the positive pole of light-emitting diode (6) is connected with current-limiting resistance (7), and the anodic bonding of the negative pole of light-emitting diode (6) and one-way SCR (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420181969.9U CN203826921U (en) | 2014-04-15 | 2014-04-15 | Charger short circuit protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420181969.9U CN203826921U (en) | 2014-04-15 | 2014-04-15 | Charger short circuit protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203826921U true CN203826921U (en) | 2014-09-10 |
Family
ID=51482385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420181969.9U Expired - Fee Related CN203826921U (en) | 2014-04-15 | 2014-04-15 | Charger short circuit protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203826921U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655968A (en) * | 2016-03-25 | 2016-06-08 | 张恒雄 | Electrical device for direct-current overcurrent short-circuit protection |
| CN114498571A (en) * | 2022-04-15 | 2022-05-13 | 天津光电惠高电子有限公司 | Power battery charger fault protection device and use method |
| CN117748405A (en) * | 2024-02-21 | 2024-03-22 | 成都凯天电子股份有限公司 | Short-circuit protection device for heating wire of airspeed tube of aircraft |
| CN117748405B (en) * | 2024-02-21 | 2024-05-31 | 成都凯天电子股份有限公司 | Short-circuit protection device for heating wire of airspeed tube of aircraft |
-
2014
- 2014-04-15 CN CN201420181969.9U patent/CN203826921U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655968A (en) * | 2016-03-25 | 2016-06-08 | 张恒雄 | Electrical device for direct-current overcurrent short-circuit protection |
| CN114498571A (en) * | 2022-04-15 | 2022-05-13 | 天津光电惠高电子有限公司 | Power battery charger fault protection device and use method |
| CN117748405A (en) * | 2024-02-21 | 2024-03-22 | 成都凯天电子股份有限公司 | Short-circuit protection device for heating wire of airspeed tube of aircraft |
| CN117748405B (en) * | 2024-02-21 | 2024-05-31 | 成都凯天电子股份有限公司 | Short-circuit protection device for heating wire of airspeed tube of aircraft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20150415 |
|
| EXPY | Termination of patent right or utility model |