Anti-countercurrent control box of charging system

Abstract

The utility model discloses an anti-countercurrent control box of a charging system, which comprises a shell, a first rectifier diode, a second rectifier diode, a fault change-over switch, a power supply state alarm circuit and a direct current contactor are arranged in the shell, one end of the power supply state alarm circuit is connected with the output end of a generator, and the other end of the power supply state alarm circuit is connected with the direct current contactor. The electric energy output end of the generator is connected with a first rectifier diode, the other end of the first rectifier diode is connected with the input end of a direct current contactor, and the output end of the direct current contactor is connected to the input end of a power supply state alarm circuit. The input end of the first rectifier diode is connected with a fault change-over switch and a second rectifier diode in parallel, and the output end of the second rectifier diode is connected with the input end of the direct current contactor. The anti-countercurrent control box for the charging system has the advantages of stable performance, low failure rate and dual circuit guarantee.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle power generation, and in particular relates to a backflow prevention control box for a charging system. Background Art

[0002] For the power supply and distribution circuits of the vehicle's DC power generation system, single-phase diodes or voltage difference relays are currently used, which have unstable performance and high failure rates. Once the existing equipment is damaged, it needs to be repaired and replaced, affecting the use of on-board equipment. Utility Model Content

[0003] The purpose of the utility model is to provide a charging system anti-backflow control box to solve the above-mentioned problems existing in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A charging system backflow prevention control box includes a shell, in which a first rectifier diode, a second rectifier diode, a fault transfer switch, a power supply status alarm circuit and a DC contactor are arranged. One end of the power supply status alarm circuit is connected to the output end of the generator, the power output end of the generator is connected to the first rectifier diode, the other end of the first rectifier diode is connected to the input end of the DC contactor, the output end of the DC contactor is connected to the input end of the power supply status alarm circuit, the input end of the first rectifier diode is connected in parallel to the fault transfer switch and the second rectifier diode, and the output end of the second rectifier diode is connected to the input end of the DC contactor.

[0006] The working process and principle of the above structure are as follows:

[0007] The on-board DC generator outputs DC current which is then turned on by the first rectifier diode and supplied to the equipment. The power supply status alarm circuit indicates the power supply status based on the voltage difference. If the power supply is abnormal or the first rectifier diode is damaged, the power supply status alarm circuit will issue an alarm prompt. At this time, the fault transfer switch will be pressed, and the other second rectifier diode will work, and the DC contactor will work to ensure normal operation of power transmission and distribution. A bidirectional high-power diode is used as a current conduction device, and a fault transfer switch is configured to achieve double conduction protection of the circuit. The charging indication and alarm circuit are installed based on the voltage difference, which can display the power supply working status. The working performance is intuitive, convenient and stable.

[0008] Furthermore, the power supply status alarm circuit includes a signal indicator light, a power supply, a buzzer and a voltage regulator connected in series in sequence, and the output end of the DC contactor is connected between the signal indicator light and the power supply.

[0009] If the power supply is abnormal or the first rectifier diode is damaged, the voltage supply of the voltage regulator is unstable, the indication alarm circuit uses a buzzer to give an alarm, and the signal indicator light also displays a warning light at the same time.

[0010] Furthermore, the output end of the generator is connected to a filter.

[0011] The setting of the filter helps to stabilize the output of current.

[0012] Furthermore, current limiting protection resistors are provided at both ends of the first rectifier diode and the second rectifier diode.

[0013] The current limiting protection resistor is mainly used to protect the first rectifier diode and the second rectifier diode to prevent the first rectifier diode and the second rectifier diode from being damaged due to overcurrent or overvoltage.

[0014] Furthermore, the housing is provided with a terminal.

[0015] The setting of the terminal makes it easy to connect the generator and external electrical equipment.

[0016] Beneficial effects: The utility model utilizes a bidirectional high-power diode as a current conduction device, configures a conversion button, realizes double conduction protection of the circuit, and uses the voltage difference to install a charging indication and alarm circuit, which can display the power supply working status. The working performance is intuitive and convenient with good stability. It effectively solves the current problems of high failure rate of voltage difference relays in vehicle-mounted power generation systems, unclear charging indications, and unstable power supply to vehicle-mounted equipment. It is simple and convenient to use, intuitive to work, and has a wide range of uses in both life and industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the circuit schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0020] Figure numerals: 1. Housing; 2. First rectifier diode; 3. Second rectifier diode; 4. Fault transfer switch; 5. Power supply status alarm circuit; 6. DC contactor; 7. Generator; 8. Signal indicator light; 9. Power supply; 10. Buzzer; 11. Voltage regulator; 12. Filter; 13. Current limiting protection resistor; 14. Terminal. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in conjunction with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structures of the drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0022] Example:

[0023] like Figure 1-Figure 3 As shown, this embodiment provides a charging system backflow prevention control box, including a shell 1, in which a first rectifier diode 2, a second rectifier diode 3, a fault transfer switch 4, a power supply status alarm circuit 5 and a DC contactor 6 are arranged. One end of the power supply status alarm circuit 5 is connected to the output end of the generator 7, and the power output end of the generator 7 is connected to the first rectifier diode 2. The other end of the first rectifier diode 2 is connected to the input end of the DC contactor 6. The output end of the DC contactor 6 is connected to the input end of the power supply status alarm circuit 5. The input end of the first rectifier diode 2 is connected in parallel with the fault transfer switch 4 and the second rectifier diode 3. The output end of the second rectifier diode 3 is connected to the input end of the DC contactor 6.

[0024] The working process and principle of the above structure are as follows:

[0025] The on-board DC generator 7 outputs DC current which is then turned on by the first rectifier diode 2 and then supplied to the equipment. The power supply status alarm circuit 5 indicates the power supply status according to the voltage difference. If the power supply is abnormal or the first rectifier diode 2 is damaged, the power supply status alarm circuit 5 will issue an alarm prompt. At this time, the fault transfer switch 4 will be pressed, and the other second rectifier diode 3 will work, and the DC contactor 6 will work to achieve normal power transmission and distribution. A bidirectional high-power diode is used as a current conduction device, and a fault transfer switch 4 is configured to achieve double conduction protection of the circuit. The charging indication and alarm circuit are installed using the voltage difference to display the power supply working status. The working performance is intuitive, convenient and stable.

[0026] In another embodiment of the present invention, Figure 1 As shown, the power supply status alarm circuit 5 includes a signal indicator light 8, a power supply 9, a buzzer 10 and a voltage regulator 11 connected in series in sequence, and the output end of the DC contactor 6 is connected between the signal indicator light 8 and the power supply 9.

[0027] If the power supply is abnormal or the first rectifier diode 2 is damaged, the voltage supply of the voltage regulator 11 is unstable, the indication alarm circuit uses the buzzer 10 to give an alarm, and the signal indicator light 8 also displays a warning light at the same time.

[0028] In another embodiment of the present invention, Figure 1 As shown, a filter 12 is connected to the output end of the generator 7 .

[0029] The setting of the filter 12 is helpful for the stable output of the current.

[0030] In another embodiment of the present invention, Figure 1 As shown, current limiting protection resistors 13 are provided at both ends of the first rectifier diode 2 and the second rectifier diode 3 .

[0031] The current limiting protection resistor 13 is mainly used to protect the first rectifier diode 2 and the second rectifier diode 3 to prevent the first rectifier diode 2 and the second rectifier diode 3 from being damaged due to overcurrent or overvoltage.

[0032] In another embodiment of the present invention, Figure 2 and Figure 3 As shown, the housing 1 is provided with a terminal 14 .

[0033] The provision of the terminal 14 facilitates the connection of the generator 7 and external electrical equipment.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A charging system backflow prevention control box, characterized in that: The invention comprises a shell, in which a first rectifier diode, a second rectifier diode, a fault conversion switch, a power supply status alarm circuit and a DC contactor are arranged. One end of the power supply status alarm circuit is connected to the output end of the generator, the power output end of the generator is connected to the first rectifier diode, the other end of the first rectifier diode is connected to the input end of the DC contactor, the output end of the DC contactor is connected to the input end of the power supply status alarm circuit, the input end of the first rectifier diode is connected in parallel to the fault conversion switch and the second rectifier diode, and the output end of the second rectifier diode is connected to the input end of the DC contactor.

2. The charging system anti-backflow control box according to claim 1, characterized in that: The power supply status alarm circuit comprises a signal indicator light, a power supply, a buzzer and a voltage regulator which are sequentially connected in series, and the output end of the DC contactor is connected between the signal indicator light and the power supply.

3. The charging system backflow prevention control box according to claim 1, characterized in that: The output end of the generator is connected to a filter.

4. The charging system backflow prevention control box according to claim 1, characterized in that: Current limiting protection resistors are provided at both ends of the first rectifier diode and the second rectifier diode.

5. The charging system backflow prevention control box according to claim 1, characterized in that: The shell is provided with a terminal.

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