CN220271539U - Effectual reverse connection detection circuit - Google Patents
Effectual reverse connection detection circuit Download PDFInfo
- Publication number
- CN220271539U CN220271539U CN202320934234.8U CN202320934234U CN220271539U CN 220271539 U CN220271539 U CN 220271539U CN 202320934234 U CN202320934234 U CN 202320934234U CN 220271539 U CN220271539 U CN 220271539U
- Authority
- CN
- China
- Prior art keywords
- resistor
- optocoupler
- reverse connection
- detection circuit
- connection detection
- 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.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to the technical field of battery management, in particular to an effective reverse connection detection circuit which comprises a first resistor, a first capacitor, an optocoupler, a first diode and a second resistor, wherein the first end of the first resistor is externally connected with a power supply, the second end of the first resistor is respectively connected with the first end of the first capacitor and the first end of the optocoupler, the second end of the first capacitor is connected with the second end of the optocoupler, the third end of the optocoupler is connected with a cathode of the first diode, the fourth end of the optocoupler is a positive input end, the anode of the first diode is connected with the first end of the second resistor, and the second end of the second resistor is a negative input end. The effective reverse connection detection circuit provided by the utility model judges whether reverse connection occurs or not through the detection level change of the I/O port of the singlechip, improves the charging reliability, can consider the charging efficiency, and realizes the monitoring and protection of the battery charging circuit with low cost, high reliability and easy realization.
Description
Technical Field
The utility model relates to the technical field of battery management, in particular to an effective reverse connection detection circuit.
Background
With the continuous development of new energy, people apply electric energy more and more widely, and the requirements of battery charge and discharge management are also more and more severe. Accordingly, the charging safety of the battery is also becoming more important, and in order to realize safe and reliable battery charging protection, a corresponding battery reverse connection protection method is required. The main body of the battery charging circuit protection board is a BUCK circuit, a charging process is realized by controlling a switch of an MOS tube, electric energy is stored in an inductor when the MOS tube is conducted, when the MOS tube is disconnected, the inductor releases energy and needs a follow current loop, the MOS tube is used for follow current to form a synchronous rectification circuit, or a diode is used for follow current to form an asynchronous rectification circuit, and in case that the voltage of the protection board is too high due to the reverse connection of the anode and the cathode of a charger, the MOS is damaged and the charging process cannot be continued.
The utility model relates to an effective reverse connection detection circuit which improves the charging reliability, can give consideration to the charging efficiency, and realizes the monitoring and protection of a battery charging circuit with low cost, high reliability and easy realization.
Disclosure of Invention
The present utility model aims to solve the above-mentioned drawbacks of the prior art by providing an effective reverse connection detection circuit.
The technical scheme adopted by the utility model is as follows:
the utility model provides an effectual reverse connection detection circuitry, including first resistance, first electric capacity, opto-coupler, first diode and second resistance, the external power supply of first electric capacity first end of first resistance second end respectively connects first electric capacity first end and opto-coupler first end, first electric capacity second end termination opto-coupler second end, opto-coupler third end connects first diode negative pole, opto-coupler fourth end is positive input, first diode positive pole connects the first end of second resistance, and the second end of second resistance is the negative input.
As a preferred technical scheme of the utility model: the third end of the optocoupler is also provided with an output end which is connected with an I/O port of the singlechip.
As a preferred technical scheme of the utility model: and the external power supply at the first end of the second resistor is 3.3V.
As a preferred technical scheme of the utility model: the second end of the first capacitor is also connected with the negative electrode of the battery.
As a preferred technical scheme of the utility model: the first resistance is 10kΩ.
As a preferred technical scheme of the utility model: the second resistance is 20kΩ.
As a preferred technical scheme of the utility model: the first capacitor model is 0.1uF/50V.
Compared with the prior art, the effective reverse connection detection circuit provided by the utility model has the beneficial effects that:
the effective reverse connection detection circuit provided by the utility model judges whether reverse connection occurs or not through the detection level change of the I/O port of the singlechip, improves the charging reliability, can consider the charging efficiency, and realizes the monitoring and protection of the battery charging circuit with low cost, high reliability and easy realization.
Drawings
Fig. 1 is a reverse connection detection circuit diagram of a preferred embodiment of the present utility model.
Detailed Description
It should be noted that, under the condition of no conflict, the embodiments of the present embodiments and features in the embodiments may be combined with each other, and the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and obviously, the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, a preferred embodiment of the present utility model provides an effective reverse connection detection circuit, which includes a first resistor, a first capacitor, an optocoupler, a first diode and a second resistor, where a first end of the first resistor is externally connected with a power supply, a second end of the first resistor is respectively connected with the first end of the first capacitor and the first end of the optocoupler, a second end of the first capacitor is connected with the second end of the optocoupler, a third end of the optocoupler is connected with a cathode of the first diode, a fourth end of the optocoupler is a positive input end, an anode of the first diode is connected with the first end of the second resistor, and a second end of the second resistor is a negative input end.
The third end of the optocoupler is also provided with an output end which is connected with an I/O port of the singlechip.
And the external power supply at the first end of the second resistor is 3.3V.
The second end of the first capacitor is also connected with the negative electrode of the battery.
The first resistance is 10kΩ.
The second resistance is 20kΩ.
The first capacitor model is 0.1uF/50V.
In this embodiment, the detection circuit includes a first resistor R1, a first capacitor C1, an optocoupler OP1, a first diode D1 and a second resistor R2, where a first end of the first resistor R1 is externally connected with a power supply, a second end of the first resistor R1 is respectively connected with a first end of the first capacitor C1 and a first end of the optocoupler OP1, where a third end of the optocoupler is provided with an output end RVIN, a second end of the first capacitor C1 is connected with a second end of the optocoupler OP1, a third end of the optocoupler OP1 is connected with a cathode of the first diode D1, a fourth end of the optocoupler OP1 is a positive input end b+, an anode of the first diode D1 is connected with a first end of the second resistor R2, and a second end of the second resistor R2 is a negative input end P-. The first resistor is 10KΩ, the second resistor is 20KΩ, the first capacitor model is 0.1uF/50V, the first diode D1 model is 4148WS, and the optocoupler is TLP291-1.
When the charger is reversely connected, the P-stage is the positive electrode of the charger, and the B+ is the negative electrode of the charger. When reverse connection occurs, the voltage of the charger enables the optical coupler OP1 to be conducted, the RVIN at the first end of the optical coupler OP1 is converted from a normal high level to a low level, the RVIN level change is detected by the I/O port of the singlechip, and the reverse connection can be judged by combining short-circuit current and short-circuit signals.
When no charger is reversely connected, namely the P-stage is the charger cathode, the B+ is the charger anode, or the circuit is not connected, the optocoupler OP1 is not conducted, RVIN corresponds to an open circuit to the ground, and the level of RVIN is pulled up to 3.3V by R1.
When the voltage of the charger is set to be 56V, the current of the input end of the optical coupler OP1 is about (56-0.6-0.6)/20K=2.74 mA during reverse connection, and the output saturation of the optical coupler OP1 is caused by the larger collector resistance of the output end of the optical coupler OP1, the voltage drop is very low, and the RVIN potential is about 0.3V, namely the low level.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. An effective reverse connection detection circuit, characterized in that: the high-voltage power supply comprises a first resistor, a first capacitor, an optocoupler, a first diode and a second resistor, wherein the first end of the first resistor is externally connected with a power supply, the second end of the first resistor is respectively connected with the first end of the first capacitor and the first end of the optocoupler, the second end of the first capacitor is connected with the second end of the optocoupler, the third end of the optocoupler is connected with a cathode of the first diode, the fourth end of the optocoupler is a positive input end, the anode of the first diode is connected with the first end of the second resistor, and the second end of the second resistor is a negative input end.
2. The active reverse connection detection circuit of claim 1, wherein: the third end of the optocoupler is also provided with an output end which is connected with an I/O port of the singlechip.
3. The active reverse connection detection circuit of claim 1, wherein: and the external power supply at the first end of the second resistor is 3.3V.
4. The active reverse connection detection circuit of claim 1, wherein: the second end of the first capacitor is also connected with the negative electrode of the battery.
5. The active reverse connection detection circuit of claim 1, wherein: the first resistance is 10kΩ.
6. The active reverse connection detection circuit of claim 1, wherein: the second resistance is 20kΩ.
7. The active reverse connection detection circuit of claim 1, wherein: the first capacitor model is 0.1uF/50V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320934234.8U CN220271539U (en) | 2023-04-24 | 2023-04-24 | Effectual reverse connection detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320934234.8U CN220271539U (en) | 2023-04-24 | 2023-04-24 | Effectual reverse connection detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220271539U true CN220271539U (en) | 2023-12-29 |
Family
ID=89311581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320934234.8U Active CN220271539U (en) | 2023-04-24 | 2023-04-24 | Effectual reverse connection detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220271539U (en) |
-
2023
- 2023-04-24 CN CN202320934234.8U patent/CN220271539U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101860084B (en) | Power supply source of high-voltage side measuring system | |
| CN108306402A (en) | A kind of master control borad super capacitor backup power supply | |
| CN201490745U (en) | Charger | |
| CN211377693U (en) | Power transmission line hybrid power supply based on solar energy and induction energy obtaining | |
| CN220271539U (en) | Effectual reverse connection detection circuit | |
| CN205829278U (en) | A kind of high efficiency energy collecting circuit under low light environment | |
| CN208691000U (en) | A kind of switching circuit for charged pool function device | |
| CN217956764U (en) | High conversion rate photovoltaic module | |
| CN201499006U (en) | Power supply for on-line monitoring system of transmission line | |
| CN212726547U (en) | Solar supplementary power supply system based on primary battery and composite capacitor | |
| CN213185598U (en) | Charging circuit capable of achieving zero-voltage charging | |
| CN209417237U (en) | DC relay closed state detection device | |
| CN209088563U (en) | A kind of electrically independent multichannel variety classes battery pack parallel control device of charge and discharge | |
| CN207705865U (en) | A kind of charging pile circuit | |
| CN210985720U (en) | Mixed type battery pack charging and discharging control system | |
| CN111431262A (en) | Solar supplementary power supply system based on primary battery and composite capacitor | |
| CN106911167B (en) | Unidirectional active equalization circuit for energy storage | |
| CN219611403U (en) | Improved constant-current and constant-voltage battery charging circuit | |
| CN220421476U (en) | Reverse connection charging protection circuit for lithium battery | |
| CN204190420U (en) | A kind of Novel photovoltaic battery charging circuit | |
| CN211296287U (en) | Breaker device of intelligence combined floodgate | |
| CN218771347U (en) | Protection circuit, power supply unit and power supply system | |
| CN211184375U (en) | Solar lawn lamp control circuit capable of being charged in parallel and discharged in series | |
| CN212572115U (en) | Multi-section efficient super capacitor charging and discharging management circuit suitable for TTU | |
| CN219164275U (en) | Storage battery pack charge-discharge protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |