CN109301897B - Circuit for preventing polarity reversal connection of external power supply and realizing controllable output of armored vehicle - Google Patents
Circuit for preventing polarity reversal connection of external power supply and realizing controllable output of armored vehicle Download PDFInfo
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- CN109301897B CN109301897B CN201811214545.7A CN201811214545A CN109301897B CN 109301897 B CN109301897 B CN 109301897B CN 201811214545 A CN201811214545 A CN 201811214545A CN 109301897 B CN109301897 B CN 109301897B
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- circuit
- external power
- power supply
- coil
- pole
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
Abstract
The invention discloses a circuit for preventing polarity reversal connection of an external power supply and realizing controllable output of an armored vehicle, and belongs to the technical field of electric systems of armored vehicles. When the polarity of the external power supply is reversed due to manual misoperation, the design of the invention can prevent the external power supply from being connected into the whole vehicle power grid, and avoid the occurrence of the hazardous consequence of electrical equipment; the invention also expands the application of the reverse connection prevention circuit through the circuit design thereof, and can realize external power transmission.
Description
Technical Field
The invention belongs to the technical field of electric system technical research of armored vehicles, and particularly relates to a circuit for preventing polarity reversal connection of an external power supply and realizing controllable output of an armored vehicle.
Background
The power supply of the external power supply is a power supply working mode commonly used by armored vehicles in the production debugging and army training processes. When the storage battery on the vehicle is insufficient and the vehicle cannot be started or the vehicle is not started to debug high-power electric equipment, the external power supply supplies power to the vehicle, so that the achievement of the current work task is ensured. Various reverse connection preventing circuits are designed for different project groups, and the reverse connection preventing function can be well realized. However, power transmission to an external load cannot be achieved due to the principle problem.
Disclosure of Invention
The purpose of the invention is 1) to solve the problem that the polarity of the power supply is reversed to damage the vehicle electronic equipment caused by artificial misoperation when the external power supply is used; 2) the defect that the original anti-reverse connection circuit cannot output external loads is overcome.
The invention provides a circuit for preventing polarity reversal connection of an external power supply and realizing controllable output of an armored vehicle, which comprises: a starting socket outside the dashboard or the switchboard, a diode D1 inside the dashboard or the switchboard, diodes D2 to D4, a main switch K1 inside the dashboard or the switchboard, an external power transmission switch K2, contactors J1 to J2, and a double-contact relay J3;
the circuit connection relationship is as follows: the positive pole of the starting socket is respectively connected with the positive pole of D1, the negative pole of D3 and the positive pole of the storage battery, and the negative pole is respectively connected with a normally closed contact of J3, a normally open contact of J2, one end of K2, a normally open contact of J1 and the negative pole of a coil thereof, the positive pole of D2 and the negative pole of the storage battery; the positive pole of D3 is connected with one pole of J3 coil, the other normally closed contact of J3 is connected with the negative pole of J2 coil and the positive pole of D4, the negative pole of D4 is connected with the positive pole of J2 coil and one end of K1, the negative pole of D2 is connected with the second end of K1 and the positive pole of J1 coil, and the negative pole of D1 is connected with the third end of K1.
Preferably, the circuit further comprises: and one end of the LED indicator lamp is connected with the other normally closed contact of J3, and the other end of the LED indicator lamp is connected with the negative electrode of D4, the positive electrode of the J2 coil and one end of K1.
Preferably, the other normally open contact of J1 is connected with the vehicle body ground.
Preferably, the starting socket is used for connecting an external power supply.
Preferably, the starting socket is used for connecting an external load.
Preferably, the starting socket is used for connecting an external charger.
The invention has the beneficial effects that: when the polarity of the external power supply is reversed due to manual misoperation, the design of the invention can prevent the external power supply from being connected into the whole vehicle power grid, and avoid the occurrence of the hazardous consequence of electrical equipment; the invention also expands the application of the reverse connection prevention circuit through the circuit design thereof, and can realize external power transmission.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The invention further describes an armored vehicle body deck tailor-welding integrated device with reference to the attached drawing 1.
The invention adjusts on the basis of the original anti-reverse connection circuit, and adds the manual output and accidental protection functions. Specifically, an anti-reverse-connection contactor J2 is added at the negative end of an external power supply entering an in-vehicle power grid, the power supply of the external power supply to a coil loop of the contactor is controlled by a diode D1, and when the polarity of the power supply is reversed, a diode D1 is cut off to realize the anti-reverse-connection function; diode D4 acts as a current reservoir and forms a bleed circuit for the back emf when the coil is open, as shown in fig. 1. When the external power supply is correctly connected with the "+", "-" on the vehicle, the diode D1 is conducted, the relay J2 is attracted, and the negative pole of the external power supply is connected with the ground of the vehicle body to realize the connection with the vehicle power supply; when the external power supply is connected with the "+", "-" on the vehicle reversely, the diode D1 is cut off, the external power supply cannot be connected with the power grid in the vehicle, and the effect of preventing the polarity of the power supply from being reversely connected is achieved.
When the external load is applied, the external power transmission switch K2 is pressed to realize the external output of the vehicle internal power supply.
As shown in FIG. 1, the circuit for preventing the reverse connection of the polarity of an external power supply and realizing the controllable output and prompt of the armored vehicle comprises: the system comprises a starting socket outside the instrument panel or the distribution board, a diode D1 inside the instrument panel or the distribution board, diodes D2-D4, a main switch K1 inside the instrument panel or the distribution board, an external power transmission switch K2, contactors J1-J2, a double-contact relay J3 and an LED indicator lamp.
The circuit connection relationship is as follows: the starting socket can be connected with an external power supply, a load or a charger; the positive pole of the starting socket is respectively connected with the positive pole of D1, the negative pole of D3 and the positive pole of the storage battery, and the negative pole is respectively connected with a normally closed contact of J3, a normally open contact of J2, one end of K2, a normally open contact of J1 and the negative pole of a coil thereof, the positive pole of D2 and the negative pole of the storage battery; the positive pole of D3 is connected with one pole of J3 coil, the other normally closed contact of J3 is connected with the negative pole of J2 coil, the positive pole of D4 and one end of LED indicator, the other end of LED indicator is connected with the negative pole of D4, the positive pole of J2 coil and one end of K1, the negative pole of D2 is connected with the second end of K1 and the positive pole of J1 coil, the negative pole of D1 is connected with the third end of K1, and the other normally open contact of J1 is connected with the ground of the vehicle body.
FIG. 1 shows an external power connection circuit on a vehicle after an improvement
The circuit operating principle of the present invention is described in detail below:
1. in the case of an external direct power supply,
normal operating mode
No matter the charging is inward or outward, in a normal path, the power enters from W +, the power reaches the positive pole of the main switch, the negative pole is prevented by the contactor J2, and the whole vehicle device does not work. When the main switch K1 is closed, the contactor J1 is closed, the contactor J2 is closed, and the external power supply and the vehicle-mounted storage battery work together.
2) Abnormal situation-accumulator removed
After J2 is closed, the negative electrode of an external power supply is introduced, the contactor J1 can be closed after the main switch K1 is closed, the load can work when the load is electrified, and the equipment in the vehicle works in a single fault mode.
3) Abnormal situation-reverse connection of external power supply
The current flows from the coil J2 to the main switch K1, and when the main switch K1 is closed, a loop cannot be formed due to the influence of D1, and J2 cannot be closed. (relay J3 will also open the J2 coil loop, ensuring that J2 cannot close);
note that after the external power source is removed, J2 remains in the on state, and the off state is restored after the main switch K1 is closed.
2. Without external power supply
1) Externally a load
Due to the fact that a load is prepared from the outside, after the main switch K1 is closed, the J2 cannot be closed, the return switch K2 needs to be closed, the negative electrode of the coil of the J2 and the negative electrode of the storage battery are connected, the J2 is in a closed state, and therefore the power source in the vehicle is transmitted to the load.
The external part is a charger and is not started
Under normal working conditions, after wiring is finished, the charger is started first, the external charger must be connected first, and after the red indicator light is lightened, power output is allowed to be realized according to K2.
Abnormal condition-the positive and negative electrodes are reversed, press K2, since J2 is closed at this time. When the connection is reversed, the coil J3 is electrified to disconnect the loop of the J2 relay and further disconnect the contact J2 (the working condition that the external charger and the storage battery form a loop, large current is generated before the circuit is cut off, the operation is forbidden due to the fact that a notice board needs to be manufactured, namely the external power supply is switched on, and the red light can trigger the K2 after being lighted).
In an abnormal condition, the positive electrode and the negative electrode are reversely connected, then the K2 is pressed, the J3 is attracted, the normally closed contact controlled by the K2 is disconnected, and the K2 pressing is invalid. And the control loop of J2 is also cut off by J3, so that the interference of an external power supply is prevented.
In order to make the display effect obvious, a red LED indicator lamp is added at two ends of the J2 coil, and the circuit is proved to be electrified after the circuit is closed.
Claims (6)
1. A circuit for preventing reverse connection of external power supply polarity and realizing controllable output of an armored vehicle is characterized by comprising: a starting socket outside the dashboard or the switchboard, a diode D1 inside the dashboard or the switchboard, diodes D2 to D4, a main switch K1 inside the dashboard or the switchboard, an external power transmission switch K2, contactors J1 to J2, and a double-contact relay J3;
the circuit connection relationship is as follows: the positive pole of the starting socket is respectively connected with the positive pole of D1, the negative pole of D3 and the positive pole of the storage battery, and the negative pole is respectively connected with a normally closed contact of J3, a normally open contact of J2, one end of K2, a normally open contact of J1 and the negative pole of a coil thereof, the positive pole of D2 and the negative pole of the storage battery; the positive pole of D3 is connected with one pole of J3 coil, the other normally closed contact of J3 is connected with the negative pole of J2 coil and the positive pole of D4, the negative pole of D4 is connected with the positive pole of J2 coil and the first end of K1, the negative pole of D2 is connected with the second end of K1 and the positive pole of J1 coil, and the negative pole of D1 is connected with the third end of K1.
2. The circuit of claim 1, wherein the circuit further comprises: and one end of the LED indicator lamp is connected with the other normally closed contact of J3, and the other end of the LED indicator lamp is connected with the negative electrode of D4, the positive electrode of the J2 coil and the first end of K1.
3. The circuit of claim 1, wherein the other normally open contact of J1 is connected to body ground.
4. A circuit as claimed in claim 1, 2 or 3, wherein the start socket is for connection to an external power source.
5. A circuit as claimed in claim 1, 2 or 3, wherein the start socket is for connection to an external load.
6. A circuit as claimed in claim 1, 2 or 3, wherein the starting socket is adapted to be connected to an external charger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811214545.7A CN109301897B (en) | 2018-10-18 | 2018-10-18 | Circuit for preventing polarity reversal connection of external power supply and realizing controllable output of armored vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811214545.7A CN109301897B (en) | 2018-10-18 | 2018-10-18 | Circuit for preventing polarity reversal connection of external power supply and realizing controllable output of armored vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109301897A CN109301897A (en) | 2019-02-01 |
| CN109301897B true CN109301897B (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811214545.7A Active CN109301897B (en) | 2018-10-18 | 2018-10-18 | Circuit for preventing polarity reversal connection of external power supply and realizing controllable output of armored vehicle |
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| CN (1) | CN109301897B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207218244U (en) * | 2017-09-05 | 2018-04-10 | 山东朗进科技股份有限公司 | A kind of direct current reverse-connection preventing circuit |
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2018
- 2018-10-18 CN CN201811214545.7A patent/CN109301897B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207218244U (en) * | 2017-09-05 | 2018-04-10 | 山东朗进科技股份有限公司 | A kind of direct current reverse-connection preventing circuit |
Non-Patent Citations (1)
| Title |
|---|
| 外部电源特性对装甲车辆电气设备可靠性的影响分析;郭会然等;《车辆与动力技术》;20150315(第1期);第57-58页 * |
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| CN109301897A (en) | 2019-02-01 |
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