CN211880123U - Output protection device of charger - Google Patents
Output protection device of charger Download PDFInfo
- Publication number
- CN211880123U CN211880123U CN202020528229.3U CN202020528229U CN211880123U CN 211880123 U CN211880123 U CN 211880123U CN 202020528229 U CN202020528229 U CN 202020528229U CN 211880123 U CN211880123 U CN 211880123U
- Authority
- CN
- China
- Prior art keywords
- output
- charger
- mos tube
- protection device
- power output
- 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.)
- Withdrawn - After Issue
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 22
- 238000007599 discharging Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 2
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 230000017105 transposition Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an output protection device of a charger, which is connected with the output end of the charger, wherein, the output protection device comprises an MOS tube used as an electronic switch, a lamp-turning signal end connected with the grid electrode of the MOS tube, a power output V + end connected with the grid electrode of the MOS tube through a first capacitor, a power GND end connected with the source electrode of the MOS tube, and a power output V-end connected with the drain electrode of the MOS tube, the output V + end and the GND end of the power supply are respectively connected with the anode and the cathode of the output end of the charger, the signal end of the rotary lamp is connected with the charging state signal output end of the charger, the power supply output V + end and the power supply output V-end are respectively used for connecting the anode and the cathode of the battery, and the output protection device also comprises a triode starting unit which is respectively connected with the positive pole and the negative pole of the battery at the power output V + end and the power output V-end and then drives the MOS tube to be opened.
Description
The technical field is as follows:
the utility model relates to a charger accessory product technical field refers in particular to an output protection device of charger.
Background art:
a charger is a device for charging various electronic products, is widely used, and becomes an essential component of the electronic products.
When the existing charger is connected with a battery terminal reversely, an internal circuit and a battery of the charger are easy to burn, and safety accidents are easy to happen. Meanwhile, the charger cannot implement a hundred percent turn-off circuit to control not to charge the battery when fully charged.
In view of the above, the present inventors propose the following.
The utility model has the following contents:
an object of the utility model is to overcome prior art's not enough, provide an output protection device of charger.
In order to solve the technical problem, the utility model discloses a following technical scheme: the output protection device of the charger is connected with the output end of the charger, wherein the output protection device comprises an MOS tube used as an electronic switch, a lamp-turning signal end connected with the grid electrode of the MOS tube, a power output V + end connected with the grid electrode of the MOS tube through a first capacitor, a power GND end connected with the source electrode of the MOS tube, and a power output V-end connected with the drain electrode of the MOS tube, the output V + end and the GND end of the power supply are respectively connected with the anode and the cathode of the output end of the charger, the signal end of the rotary lamp is connected with the charging state signal output end of the charger, the power supply output V + end and the power supply output V-end are respectively used for connecting the anode and the cathode of the battery, and the output protection device also comprises a triode starting unit which is respectively connected with the positive pole and the negative pole of the battery at the power output V + end and the power output V-end and then drives the MOS tube to be opened.
Further, in the above technical solution, the triode starting unit includes a triode, a resistor R2 and a capacitor C2 connected to the b-pole of the triode, a resistor R1 connected to the e-pole of the triode, and a resistor R5 for discharging the capacitor C2, the resistor R1 and the resistor R2 are both connected to the V + end of the power output, the C-pole of the triode is connected to the gate of the MOS transistor, and the capacitor C2 is connected to the drain of the MOS transistor and the V-end of the power output.
Further, in the above technical solution, a voltage regulator tube is connected between the gate and the source of the MOS transistor.
Further, in the above technical solution, two ends of the voltage regulator tube are also connected in parallel with a resistor R3.
Further, in the above technical solution, the resistance of the resistor R2 is 28 times as large as the resistance of the resistor R1.
Further, in the above technical solution, a diode D1 is further connected between the gate of the MOS transistor and the lamp turning signal terminal.
Further, in the above technical solution, the MOS transistor is of the type NCEP01T 13.
Further, in the above technical solution, the type of the triode is 2N 5401.
An object of the utility model is to overcome prior art's not enough, provide an output protection device of charger.
In order to solve the technical problem, the utility model discloses a following technical scheme: the output protection device of the charger is connected with the output end of the charger, wherein the output protection device comprises an MOS tube used as an electronic switch, a power supply output V + end, a lamp-turning signal end connected with the grid electrode of the MOS tube, a VCC end connected with the grid electrode of the MOS tube through a first capacitor, a power supply GND end connected with the source electrode of the MOS tube, and a power supply output V-end connected with the drain electrode of the MOS tube, the output V + end and the GND end of the power supply are respectively connected with the anode and the cathode of the output end of the charger, the signal end of the rotary lamp is connected with the charging state signal output end of the charger, the VCC end is connected with the VCC end of the charger, the power output V + end and the power output V-end are respectively used for connecting the anode and the cathode of the battery, and the output protection device also comprises a triode starting unit which is respectively connected with the positive pole and the negative pole of the battery at the power output V + end and the power output V-end and then drives the MOS tube to be opened.
After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: the utility model relates to a little PCB board, with the charger independent design, additionally add little PCB board promptly on the charger, make the charger have multiple protect function: 1. no-load (do not connect the battery) does not have output protection, 2, battery transposition protection, 3, charger red light turn green light stop charging promptly the utility model discloses can realize multistage protection to supplementary charger charging work is applicable to various chargers, and it is very convenient to use, just the utility model provides an electronic components is few, and the overall arrangement is simple, still can realize multiple functions, the order the utility model has extremely strong market competition. Of course, the circuit in the present invention can also be designed and integrated on the PCB board of the charger, which can be designed according to the actual use requirement.
Description of the drawings:
fig. 1 is a circuit diagram of a first embodiment of the present invention;
fig. 2 is a circuit diagram of a second embodiment of the present invention.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following specific embodiments and accompanying drawings.
The first embodiment is as follows:
referring to fig. 1, the output protection device 100 of a charger is shown, the output protection device 100 is connected to an output terminal of the charger, wherein the output protection device 100 includes a MOS transistor 1 serving as an electronic switch, a lamp-turning signal terminal 2 connected to a gate of the MOS transistor 1, a power output V + terminal 3 connected to the gate of the MOS transistor 1 through a first capacitor 31, a power GND terminal 4 connected to a source of the MOS transistor 1, and a power output V-terminal 5 connected to a drain of the MOS transistor 1, the power output V + terminal 3 and the power GND terminal 4 are respectively connected to an anode and a cathode of the output terminal of the charger, the lamp-turning signal terminal 2 is connected to a charging state signal output terminal of the charger, the power output V + terminal 3 and the power output V-terminal 5 are respectively connected to an anode and a cathode of a battery 6, and the output protection device 100 further includes a power output V + terminal 3 and the power output V-terminal 5 are respectively connected to an anode and a cathode of the battery 6 And driving a triode starting unit 7 for turning on the MOS tube 1. When the power supply is standby (the charger is connected with the commercial power, but is not connected with the battery), the lamp-turning signal end is at a low potential (0V), and when the output current is more than 0.2A, the lamp-turning signal end is changed into a high potential (16V). When the power output V + end 3 and the power output V-end 5 are not connected with the battery 6 and a power supply is started (namely, a charger is connected with commercial power), the lamp turning signal end 2 is at a low potential, the triode starting unit 7 does not work, the voltage of the power output V + end 3 enables the grid voltage of the MOS tube 1 to be instantly greater than 2.5V through the first capacitor 31, the MOS tube 1 is instantly conducted, but because the lamp turning signal end 2 is at the low potential, the grid voltage of the MOS tube 1 is rapidly reduced and kept at the low potential, the MOS tube 1 is cut off, and the power output V + end 3 and the power output V-end 5 do not output, so that the purpose of no-load protection is achieved; when the anti-battery is connected firstly and then the power supply is started (namely the charger is connected with the commercial power), the voltage of the power supply output V + end 3 enables the grid voltage of the MOS tube 1 to be instantly larger than 2.5V through the first capacitor 31, the MOS tube 1 is instantly conducted, but as the lamp turning signal end 2 is at a low potential, the grid voltage of the MOS tube 1 is rapidly reduced and the low potential is kept, the MOS tube 1 is cut off, the anti-battery is connected, the triode starting unit 7 does not work, the MOS tube 1 is kept cut off, and the power supply output V + end 3 and the power supply output V-end 5 do not output, so that the aim of reverse connection protection is fulfilled; when the battery 6 is positively connected, the voltage of the battery 6 drives the triode starting unit 7 to work, the triode starting unit 7 enables the grid voltage of the MOS tube 1 to be larger than 2.5V, and the MOS tube 1 is conducted; the battery is charged, the charger outputs a high-level lamp-turning signal to the lamp-turning signal end 2, so that the lamp-turning signal end 2 keeps high potential, the grid voltage of the MOS tube 1 keeps more than 2.5V, and the charger continuously charges the battery; after the battery is fully charged, the charger outputs a low-level lamp turning signal to the lamp turning signal end 2, so that the lamp turning signal end 2 keeps a low potential, the grid voltage of the MOS tube 1 is reduced, the MOS tube 1 is cut off, the output is cut off, and the purpose of full-charge cut-off is achieved. Also, it will say that the utility model relates to a little PCB board, with the charger independent design, additionally add little PCB board promptly on the charger, make the charger have multiple protect function: 1. no-load (do not connect the battery) does not have output protection, 2, battery transposition protection, 3, charger red light turn green light stop charging promptly the utility model discloses can realize multistage protection to supplementary charger charging work is applicable to various chargers, and it is very convenient to use, just the utility model provides an electronic components is few, and the overall arrangement is simple, still can realize multiple functions, the order the utility model has extremely strong market competition. Of course, the circuit in the present invention can also be designed and integrated on the PCB board of the charger, which can be designed according to the actual use requirement.
The triode starting unit 7 comprises a triode 71, a resistor R2 and a capacitor C2 which are connected with the b pole of the triode 71, a resistor R1 which is connected with the e pole of the triode 71, and a resistor R5 which is used for discharging the capacitor C2, wherein the resistor R1 and the resistor R2 are both connected with the V + end 3 of the power output, the C pole of the triode 71 is connected with the grid electrode of the MOS tube 1, the capacitor C2 is connected with the drain electrode of the MOS tube 1 and the V-end 5 of the power output, and the resistance value of the resistor R2 is 28 times of the resistance value of the resistor R1. When the power output V + terminal 3 and the power output V-terminal 5 are not connected to the battery 6 and the power supply is started, or when the reverse battery is connected first and the power supply is started again, the transistors 71 in the transistor starting unit 7 are both in a non-conducting state, so that the transistor starting unit 7 does not work. When the battery 6 is connected positively, the voltage of the battery 6 charges the capacitor C2 through the resistor R2, the potential of the b electrode of the triode 71 is pulled down due to the charging of the capacitor C2 at the moment of charging, the triode 71 is conducted, the triode starting unit 7 works, the grid voltage of the MOS tube 1 is larger than 2.5V after the triode 71 is conducted, the MOS tube 1 is conducted, and then the resistor R5 discharges the capacitor C2 to ensure that the charger charges the battery normally; the battery is charged, a charging indicator lamp of the charger is turned on by a red lamp, the charger outputs a high-level lamp turning signal to a lamp turning signal end 2, the lamp turning signal end 2 keeps high potential, the grid voltage of the MOS tube 1 keeps more than 2.5V, and the charger continuously charges the battery; after the battery is fully charged, the charging indicator light of the charger is changed from a red light to a green light, the charger outputs a low-level light-turning signal to the light-turning signal end 2, the light-turning signal end 2 keeps a low potential, the grid voltage of the MOS tube 1 is reduced, the MOS tube 1 is cut off, the output is cut off, and the purpose of fully turning off the battery is achieved.
Be connected with stabilivolt 11 between MOS pipe 1's grid and the source electrode, guarantee that MOS pipe 1's grid voltage is greater than 2.5V and can switch on, guarantee MOS pipe 1 steady operation simultaneously, make the utility model discloses the operation is more reliable. And a resistor R3 is also connected in parallel at two ends of the voltage regulator tube 11.
Still be connected with diode D1 between MOS tube 1's grid and the signal terminal 2 that changes the light, this diode D1 can play and change the low level isolation of the signal of the light with MOS tube's grid, just so can reduce the capacity of first electric capacity 31, and the short circuit effect can be better.
The MOS tube 1 is of the model number of NCEP01T 13. The model of the triode 71 is 2N 5401.
To sum up, the utility model relates to a little PCB board, with the charger independent design, additionally add little PCB board promptly on the charger, make the charger have multiple protect function: 1. no-load (do not connect the battery) does not have output protection, 2, battery transposition protection, 3, charger red light turn green light stop charging promptly the utility model discloses can realize multistage protection to supplementary charger charging work is applicable to various chargers, and it is very convenient to use, just the utility model provides an electronic components is few, and the overall arrangement is simple, still can realize multiple functions, the order the utility model has extremely strong market competition. Of course, the circuit in the present invention can also be designed and integrated on the PCB board of the charger, which can be designed according to the actual use requirement.
Example two:
the second embodiment is different from the first embodiment in that: the output protection device 100 includes a MOS transistor 1 as an electronic switch, a power output V + terminal 3, a lamp-turning signal terminal 2 connected to the gate of the MOS transistor 1, a VCC terminal 8 connected to the gate of the MOS transistor 1 through a first capacitor 31, a power GND terminal 4 connected to the source of the MOS transistor 1, and a power output V-terminal 5 connected to the drain of the MOS transistor 1, where the VCC terminal 8 is connected to the VCC terminal of a charger, and the first capacitor 31 of the second embodiment is connected between the VCC terminal 8 and the gate of the MOS transistor 1, which is advantageous in that: the utility model provides a circuit also can design when integrated on the PCB board of charger, first electric capacity 31, VCC end 8, this MOS pipe 1's grid are connected, and it is convenient for walk the line.
The other structures of the second embodiment are the same as those of the first embodiment, and the same technical effects can be achieved, and are not described in detail herein.
Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.
Claims (9)
1. An output protection device of a charger, characterized in that: the output protection device (100) is connected with the output end of a charger, wherein the output protection device (100) comprises an MOS tube (1) used as an electronic switch, a lamp-turning signal end (2) connected with the grid electrode of the MOS tube (1), a power output V + end (3) connected with the grid electrode of the MOS tube (1) through a first capacitor (31), a power GND end (4) connected with the source electrode of the MOS tube (1), and a power output V-end (5) connected with the drain electrode of the MOS tube (1), the power output V + end (3) and the power GND end (4) are respectively connected with the positive electrode and the negative electrode of the output end of the charger, the lamp-turning signal end (2) is connected with the charging state signal output end of the charger, the power output V + end (3) and the power output V-end (5) are respectively used for connecting the positive electrode and the negative electrode of a battery (6), and the output protection device (100) also comprises a triode starting unit (7) which is connected with the positive electrode and the negative electrode of the battery (6) respectively at the power output V + end (3) and the power output V-end (5) and then drives the MOS tube (1) to be opened.
2. The output protection device of a charger according to claim 1, wherein: the triode starting unit (7) comprises a triode (71), a resistor R2 and a capacitor C2 which are connected with the b pole of the triode (71), a resistor R1 which is connected with the e pole of the triode (71), and a resistor R5 which is used for discharging the capacitor C2, wherein the resistor R1 and the resistor R2 are both connected with the power output V + end (3), the C pole of the triode (71) is connected with the grid electrode of the MOS tube (1), and the capacitor C2 is connected with the drain electrode of the MOS tube (1) and the power output V-end (5).
3. The output protection device of a charger according to claim 2, wherein: and a voltage stabilizing tube (11) is connected between the grid electrode and the source electrode of the MOS tube (1).
4. The output protection device of a charger according to claim 3, wherein: and two ends of the voltage-stabilizing tube (11) are also connected with a resistor R3 in parallel.
5. The output protection device of a charger according to claim 3, wherein: the resistance of the resistor R2 is 28 times of the resistance of the resistor R1.
6. The output protection device of a charger according to any one of claims 1 to 5, wherein: and a diode D1 is also connected between the grid of the MOS tube (1) and the lamp turning signal end (2).
7. The output protection device of a charger according to any one of claims 1 to 5, wherein: the MOS tube (1) is of the type NCEP01T 13.
8. The output protection device of a charger according to claim 2, wherein: the model of the triode (71) is 2N 5401.
9. An output protection device of a charger, characterized in that: the output protection device (100) is connected with the output end of a charger, wherein the output protection device (100) comprises an MOS tube (1) used as an electronic switch, a power output V + end (3), a lamp conversion signal end (2) connected with the grid electrode of the MOS tube (1), a VCC end (8) connected with the grid electrode of the MOS tube (1) through a first capacitor (31), a power GND end (4) connected with the source electrode of the MOS tube (1), and a power output V-end (5) connected with the drain electrode of the MOS tube (1), the power output V + end (3) and the power GND end (4) are respectively connected with the positive electrode and the negative electrode of the output end of the charger, the lamp conversion signal end (2) is connected with the charging state signal output end of the charger, the VCC end (8) is connected with the VCC end of the charger, the power output V + end (3) and the power output V-end (5) are respectively used for connecting the positive electrode and the negative electrode of a battery (6), and the output protection device (100) also comprises a triode starting unit (7) which is connected with the positive electrode and the negative electrode of the battery (6) respectively at the power output V + end (3) and the power output V-end (5) and then drives the MOS tube (1) to be opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020528229.3U CN211880123U (en) | 2020-04-11 | 2020-04-11 | Output protection device of charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020528229.3U CN211880123U (en) | 2020-04-11 | 2020-04-11 | Output protection device of charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211880123U true CN211880123U (en) | 2020-11-06 |
Family
ID=73249916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020528229.3U Withdrawn - After Issue CN211880123U (en) | 2020-04-11 | 2020-04-11 | Output protection device of charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211880123U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342526A (en) * | 2020-04-11 | 2020-06-26 | 东莞市福洋电子有限公司 | Output protection device of charger |
-
2020
- 2020-04-11 CN CN202020528229.3U patent/CN211880123U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342526A (en) * | 2020-04-11 | 2020-06-26 | 东莞市福洋电子有限公司 | Output protection device of charger |
| CN111342526B (en) * | 2020-04-11 | 2024-06-25 | 东莞市福洋电子有限公司 | Output protection device of charger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017020782A1 (en) | Battery charging and discharging control circuit and battery charging and discharging system | |
| CN105098891A (en) | Common-port charging awakening circuit for battery management system | |
| CN111071049A (en) | Voltage output reverse connection prevention circuit | |
| CN111969577A (en) | Low-power-consumption reverse connection protection circuit for vehicle and control method thereof | |
| CN211880123U (en) | Output protection device of charger | |
| WO2021258367A1 (en) | Control circuit, battery management system, and electrochemical device | |
| WO2021258366A1 (en) | Control circuit, battery management system and electrochemical device | |
| CN203691219U (en) | Isolating power drive circuit | |
| CN103326433B (en) | Powering portable devices control circuit and portable monitor | |
| CN211456722U (en) | Multi-stage protection charger charging auxiliary circuit | |
| US20210376648A1 (en) | Output protector for charger | |
| CN111342526B (en) | Output protection device of charger | |
| CN209402181U (en) | A kind of battery over-discharge protection circuit, communication equipment and battery | |
| CN210724557U (en) | Instantaneous power-down holding circuit with reverse-prevention and power-on impact current suppression | |
| CN209562228U (en) | Electrification circuit and clock circuit | |
| CN110854970B (en) | Multi-stage protection charger charging auxiliary circuit | |
| CN210380283U (en) | Be applied to charge-discharge circuit of lithium cell | |
| CN213185879U (en) | Charge pump circuit | |
| CN104283245A (en) | High-conversion-efficiency mobile power source circuit | |
| CN216959365U (en) | Robot charging circuit and robot | |
| CN210985703U (en) | Charger charging auxiliary circuit with full-charging turn-off function | |
| CN219875094U (en) | Reverse connection preventing protection circuit | |
| CN219394447U (en) | Driving circuit suitable for lithium battery protection board and lithium battery | |
| CN214154063U (en) | Charging protection circuit | |
| CN212343639U (en) | Efficient initiative discharge circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20201106 Effective date of abandoning: 20240625 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20201106 Effective date of abandoning: 20240625 |